drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 0;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2xuctrlirq = 1;
  70 module_param(ql2xuctrlirq, int, 0644);
  71 MODULE_PARM_DESC(ql2xuctrlirq,
  72     "User to control IRQ placement via smp_affinity."
  73     "Valid with qlini_mode=disabled."
  74     "1(default): enable");
  75
  76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  77
  78 static int qla_sam_status = SAM_STAT_BUSY;
  79 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  80
  81 /*
  82  * From scsi/fc/fc_fcp.h
  83  */
  84 enum fcp_resp_rsp_codes {
  85         FCP_TMF_CMPL = 0,
  86         FCP_DATA_LEN_INVALID = 1,
  87         FCP_CMND_FIELDS_INVALID = 2,
  88         FCP_DATA_PARAM_MISMATCH = 3,
  89         FCP_TMF_REJECTED = 4,
  90         FCP_TMF_FAILED = 5,
  91         FCP_TMF_INVALID_LUN = 9,
  92 };
  93
  94 /*
  95  * fc_pri_ta from scsi/fc/fc_fcp.h
  96  */
  97 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  98 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  99 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
 100 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 101 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 102 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 103 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 104
 105 /*
 106  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 107  * must be called under HW lock and could unlock/lock it inside.
 108  * It isn't an issue, since in the current implementation on the time when
 109  * those functions are called:
 110  *
 111  *   - Either context is IRQ and only IRQ handler can modify HW data,
 112  *     including rings related fields,
 113  *
 114  *   - Or access to target mode variables from struct qla_tgt doesn't
 115  *     cross those functions boundaries, except tgt_stop, which
 116  *     additionally protected by irq_cmd_count.
 117  */
 118 /* Predefs for callbacks handed to qla2xxx LLD */
 119 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 120         struct atio_from_isp *pkt, uint8_t);
 121 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 122         response_t *pkt);
 123 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 124         int fn, void *iocb, int flags);
 125 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 126         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 127 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 128         struct atio_from_isp *atio, uint16_t status, int qfull);
 129 static void qlt_disable_vha(struct scsi_qla_host *vha);
 130 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 131 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 132         struct imm_ntfy_from_isp *ntfy,
 133         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 134         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 135 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 136         struct imm_ntfy_from_isp *imm, int ha_locked);
 137 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 138         fc_port_t *fcport, bool local);
 139 void qlt_unreg_sess(struct fc_port *sess);
 140 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 141         struct abts_recv_from_24xx *);
 142 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 143     uint16_t);
 144 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 145 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 146
 147 /*
 148  * Global Variables
 149  */
 150 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 151 struct kmem_cache *qla_tgt_plogi_cachep;
 152 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 153 static struct workqueue_struct *qla_tgt_wq;
 154 static DEFINE_MUTEX(qla_tgt_mutex);
 155 static LIST_HEAD(qla_tgt_glist);
 156
 157 static const char *prot_op_str(u32 prot_op)
 158 {
 159         switch (prot_op) {
 160         case TARGET_PROT_NORMAL:        return "NORMAL";
 161         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 162         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 163         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 164         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 165         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 166         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 167         default:                        return "UNKNOWN";
 168         }
 169 }
 170
 171 /* This API intentionally takes dest as a parameter, rather than returning
 172  * int value to avoid caller forgetting to issue wmb() after the store */
 173 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 174 {
 175         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 176         *dest = atomic_inc_return(&base_vha->generation_tick);
 177         /* memory barrier */
 178         wmb();
 179 }
 180
 181 /* Might release hw lock, then reaquire!! */
 182 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 183 {
 184         /* Send marker if required */
 185         if (unlikely(vha->marker_needed != 0)) {
 186                 int rc = qla2x00_issue_marker(vha, vha_locked);
 187                 if (rc != QLA_SUCCESS) {
 188                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 189                             "qla_target(%d): issue_marker() failed\n",
 190                             vha->vp_idx);
 191                 }
 192                 return rc;
 193         }
 194         return QLA_SUCCESS;
 195 }
 196
 197 static inline
 198 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 199         uint8_t *d_id)
 200 {
 201         struct scsi_qla_host *host;
 202         uint32_t key = 0;
 203
 204         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 205             (vha->d_id.b.al_pa == d_id[2]))
 206                 return vha;
 207
 208         key  = (uint32_t)d_id[0] << 16;
 209         key |= (uint32_t)d_id[1] <<  8;
 210         key |= (uint32_t)d_id[2];
 211
 212         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 213         if (!host)
 214                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 215                     "Unable to find host %06x\n", key);
 216
 217         return host;
 218 }
 219
 220 static inline
 221 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 222         uint16_t vp_idx)
 223 {
 224         struct qla_hw_data *ha = vha->hw;
 225
 226         if (vha->vp_idx == vp_idx)
 227                 return vha;
 228
 229         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 230         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 231                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 232
 233         return NULL;
 234 }
 235
 236 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 237 {
 238         unsigned long flags;
 239
 240         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 241
 242         vha->hw->tgt.num_pend_cmds++;
 243         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 244                 vha->qla_stats.stat_max_pend_cmds =
 245                         vha->hw->tgt.num_pend_cmds;
 246         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 247 }
 248 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 249 {
 250         unsigned long flags;
 251
 252         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 253         vha->hw->tgt.num_pend_cmds--;
 254         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 255 }
 256
 257
 258 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 259         struct atio_from_isp *atio, uint8_t ha_locked)
 260 {
 261         struct qla_tgt_sess_op *u;
 262         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 263         unsigned long flags;
 264
 265         if (tgt->tgt_stop) {
 266                 ql_dbg(ql_dbg_async, vha, 0x502c,
 267                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 268                     vha->vp_idx);
 269                 goto out_term;
 270         }
 271
 272         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 273         if (u == NULL)
 274                 goto out_term;
 275
 276         u->vha = vha;
 277         memcpy(&u->atio, atio, sizeof(*atio));
 278         INIT_LIST_HEAD(&u->cmd_list);
 279
 280         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 281         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 282         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 283
 284         schedule_delayed_work(&vha->unknown_atio_work, 1);
 285
 286 out:
 287         return;
 288
 289 out_term:
 290         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 291         goto out;
 292 }
 293
 294 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 295         uint8_t ha_locked)
 296 {
 297         struct qla_tgt_sess_op *u, *t;
 298         scsi_qla_host_t *host;
 299         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 300         unsigned long flags;
 301         uint8_t queued = 0;
 302
 303         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 304                 if (u->aborted) {
 305                         ql_dbg(ql_dbg_async, vha, 0x502e,
 306                             "Freeing unknown %s %p, because of Abort\n",
 307                             "ATIO_TYPE7", u);
 308                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 309                             &u->atio, ha_locked, 0);
 310                         goto abort;
 311                 }
 312
 313                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 314                 if (host != NULL) {
 315                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 316                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 317                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 318                 } else if (tgt->tgt_stop) {
 319                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 320                             "Freeing unknown %s %p, because tgt is being stopped\n",
 321                             "ATIO_TYPE7", u);
 322                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 323                             &u->atio, ha_locked, 0);
 324                 } else {
 325                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 326                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 327                         if (!queued) {
 328                                 queued = 1;
 329                                 schedule_delayed_work(&vha->unknown_atio_work,
 330                                     1);
 331                         }
 332                         continue;
 333                 }
 334
 335 abort:
 336                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 337                 list_del(&u->cmd_list);
 338                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 339                 kfree(u);
 340         }
 341 }
 342
 343 void qlt_unknown_atio_work_fn(struct work_struct *work)
 344 {
 345         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 346             struct scsi_qla_host, unknown_atio_work);
 347
 348         qlt_try_to_dequeue_unknown_atios(vha, 0);
 349 }
 350
 351 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 352         struct atio_from_isp *atio, uint8_t ha_locked)
 353 {
 354         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 355                 "%s: qla_target(%d): type %x ox_id %04x\n",
 356                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 357                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 358
 359         switch (atio->u.raw.entry_type) {
 360         case ATIO_TYPE7:
 361         {
 362                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 363                     atio->u.isp24.fcp_hdr.d_id);
 364                 if (unlikely(NULL == host)) {
 365                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 366                             "qla_target(%d): Received ATIO_TYPE7 "
 367                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 368                             atio->u.isp24.fcp_hdr.d_id[0],
 369                             atio->u.isp24.fcp_hdr.d_id[1],
 370                             atio->u.isp24.fcp_hdr.d_id[2]);
 371
 372
 373                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 374                         break;
 375                 }
 376                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 377                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 378
 379                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 380                 break;
 381         }
 382
 383         case IMMED_NOTIFY_TYPE:
 384         {
 385                 struct scsi_qla_host *host = vha;
 386                 struct imm_ntfy_from_isp *entry =
 387                     (struct imm_ntfy_from_isp *)atio;
 388
 389                 qlt_issue_marker(vha, ha_locked);
 390
 391                 if ((entry->u.isp24.vp_index != 0xFF) &&
 392                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 393                         host = qlt_find_host_by_vp_idx(vha,
 394                             entry->u.isp24.vp_index);
 395                         if (unlikely(!host)) {
 396                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 397                                     "qla_target(%d): Received "
 398                                     "ATIO (IMMED_NOTIFY_TYPE) "
 399                                     "with unknown vp_index %d\n",
 400                                     vha->vp_idx, entry->u.isp24.vp_index);
 401                                 break;
 402                         }
 403                 }
 404                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 405                 break;
 406         }
 407
 408         case VP_RPT_ID_IOCB_TYPE:
 409                 qla24xx_report_id_acquisition(vha,
 410                         (struct vp_rpt_id_entry_24xx *)atio);
 411                 break;
 412
 413         case ABTS_RECV_24XX:
 414         {
 415                 struct abts_recv_from_24xx *entry =
 416                         (struct abts_recv_from_24xx *)atio;
 417                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 418                         entry->vp_index);
 419                 unsigned long flags;
 420
 421                 if (unlikely(!host)) {
 422                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 423                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 424                             "received, with unknown vp_index %d\n",
 425                             vha->vp_idx, entry->vp_index);
 426                         break;
 427                 }
 428                 if (!ha_locked)
 429                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 430                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 431                 if (!ha_locked)
 432                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 433                 break;
 434         }
 435
 436         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 437
 438         default:
 439                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 440                     "qla_target(%d): Received unknown ATIO atio "
 441                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 442                 break;
 443         }
 444
 445         return false;
 446 }
 447
 448 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 449         struct rsp_que *rsp, response_t *pkt)
 450 {
 451         switch (pkt->entry_type) {
 452         case CTIO_CRC2:
 453                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 454                         "qla_target(%d):%s: CRC2 Response pkt\n",
 455                         vha->vp_idx, __func__);
 456                 /* fall through */
 457         case CTIO_TYPE7:
 458         {
 459                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 460                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 461                     entry->vp_index);
 462                 if (unlikely(!host)) {
 463                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 464                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 465                             "received, with unknown vp_index %d\n",
 466                             vha->vp_idx, entry->vp_index);
 467                         break;
 468                 }
 469                 qlt_response_pkt(host, rsp, pkt);
 470                 break;
 471         }
 472
 473         case IMMED_NOTIFY_TYPE:
 474         {
 475                 struct scsi_qla_host *host = vha;
 476                 struct imm_ntfy_from_isp *entry =
 477                     (struct imm_ntfy_from_isp *)pkt;
 478
 479                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 480                 if (unlikely(!host)) {
 481                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 482                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 483                             "received, with unknown vp_index %d\n",
 484                             vha->vp_idx, entry->u.isp24.vp_index);
 485                         break;
 486                 }
 487                 qlt_response_pkt(host, rsp, pkt);
 488                 break;
 489         }
 490
 491         case NOTIFY_ACK_TYPE:
 492         {
 493                 struct scsi_qla_host *host = vha;
 494                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 495
 496                 if (0xFF != entry->u.isp24.vp_index) {
 497                         host = qlt_find_host_by_vp_idx(vha,
 498                             entry->u.isp24.vp_index);
 499                         if (unlikely(!host)) {
 500                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 501                                     "qla_target(%d): Response "
 502                                     "pkt (NOTIFY_ACK_TYPE) "
 503                                     "received, with unknown "
 504                                     "vp_index %d\n", vha->vp_idx,
 505                                     entry->u.isp24.vp_index);
 506                                 break;
 507                         }
 508                 }
 509                 qlt_response_pkt(host, rsp, pkt);
 510                 break;
 511         }
 512
 513         case ABTS_RECV_24XX:
 514         {
 515                 struct abts_recv_from_24xx *entry =
 516                     (struct abts_recv_from_24xx *)pkt;
 517                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 518                     entry->vp_index);
 519                 if (unlikely(!host)) {
 520                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 521                             "qla_target(%d): Response pkt "
 522                             "(ABTS_RECV_24XX) received, with unknown "
 523                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 524                         break;
 525                 }
 526                 qlt_response_pkt(host, rsp, pkt);
 527                 break;
 528         }
 529
 530         case ABTS_RESP_24XX:
 531         {
 532                 struct abts_resp_to_24xx *entry =
 533                     (struct abts_resp_to_24xx *)pkt;
 534                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 535                     entry->vp_index);
 536                 if (unlikely(!host)) {
 537                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 538                             "qla_target(%d): Response pkt "
 539                             "(ABTS_RECV_24XX) received, with unknown "
 540                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 541                         break;
 542                 }
 543                 qlt_response_pkt(host, rsp, pkt);
 544                 break;
 545         }
 546         default:
 547                 qlt_response_pkt(vha, rsp, pkt);
 548                 break;
 549         }
 550
 551 }
 552
 553 /*
 554  * All qlt_plogi_ack_t operations are protected by hardware_lock
 555  */
 556 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 557         struct imm_ntfy_from_isp *ntfy, int type)
 558 {
 559         struct qla_work_evt *e;
 560         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 561         if (!e)
 562                 return QLA_FUNCTION_FAILED;
 563
 564         e->u.nack.fcport = fcport;
 565         e->u.nack.type = type;
 566         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 567         return qla2x00_post_work(vha, e);
 568 }
 569
 570 static
 571 void qla2x00_async_nack_sp_done(void *s, int res)
 572 {
 573         struct srb *sp = (struct srb *)s;
 574         struct scsi_qla_host *vha = sp->vha;
 575         unsigned long flags;
 576
 577         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 578             "Async done-%s res %x %8phC  type %d\n",
 579             sp->name, res, sp->fcport->port_name, sp->type);
 580
 581         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 582         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 583         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 584
 585         switch (sp->type) {
 586         case SRB_NACK_PLOGI:
 587                 sp->fcport->login_gen++;
 588                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 589                 sp->fcport->logout_on_delete = 1;
 590                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 591                 sp->fcport->send_els_logo = 0;
 592                 break;
 593
 594         case SRB_NACK_PRLI:
 595                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 596                 sp->fcport->deleted = 0;
 597                 sp->fcport->send_els_logo = 0;
 598
 599                 if (!sp->fcport->login_succ &&
 600                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 601                         sp->fcport->login_succ = 1;
 602
 603                         vha->fcport_count++;
 604                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 605                         qla24xx_sched_upd_fcport(sp->fcport);
 606                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 607                 } else {
 608                         sp->fcport->login_retry = 0;
 609                         sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
 610                         sp->fcport->deleted = 0;
 611                         sp->fcport->logout_on_delete = 1;
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         sp->free(sp);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 break;
 639         case SRB_NACK_PRLI:
 640                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 641                 fcport->deleted = 0;
 642                 c = "PRLI";
 643                 break;
 644         case SRB_NACK_LOGO:
 645                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 646                 c = "LOGO";
 647                 break;
 648         }
 649
 650         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 651         if (!sp)
 652                 goto done;
 653
 654         sp->type = type;
 655         sp->name = "nack";
 656
 657         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 658         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 659
 660         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 661         sp->done = qla2x00_async_nack_sp_done;
 662
 663         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 664             "Async-%s %8phC hndl %x %s\n",
 665             sp->name, fcport->port_name, sp->handle, c);
 666
 667         rval = qla2x00_start_sp(sp);
 668         if (rval != QLA_SUCCESS)
 669                 goto done_free_sp;
 670
 671         return rval;
 672
 673 done_free_sp:
 674         sp->free(sp);
 675 done:
 676         fcport->flags &= ~FCF_ASYNC_SENT;
 677         return rval;
 678 }
 679
 680 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 681 {
 682         fc_port_t *t;
 683         unsigned long flags;
 684
 685         switch (e->u.nack.type) {
 686         case SRB_NACK_PRLI:
 687                 t = e->u.nack.fcport;
 688                 flush_work(&t->del_work);
 689                 flush_work(&t->free_work);
 690                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 691                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 692                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 693                 if (t) {
 694                         ql_log(ql_log_info, vha, 0xd034,
 695                             "%s create sess success %p", __func__, t);
 696                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 697                         /* create sess has an extra kref */
 698                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 699                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 700                 }
 701                 break;
 702         }
 703         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 704             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 705 }
 706
 707 void qla24xx_delete_sess_fn(struct work_struct *work)
 708 {
 709         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 710         struct qla_hw_data *ha = fcport->vha->hw;
 711         unsigned long flags;
 712
 713         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 714
 715         if (fcport->se_sess) {
 716                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 717                 ha->tgt.tgt_ops->put_sess(fcport);
 718         } else {
 719                 qlt_unreg_sess(fcport);
 720         }
 721         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 722 }
 723
 724 /*
 725  * Called from qla2x00_reg_remote_port()
 726  */
 727 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 728 {
 729         struct qla_hw_data *ha = vha->hw;
 730         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 731         struct fc_port *sess = fcport;
 732         unsigned long flags;
 733
 734         if (!vha->hw->tgt.tgt_ops)
 735                 return;
 736
 737         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 738         if (tgt->tgt_stop) {
 739                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 740                 return;
 741         }
 742
 743         if (fcport->disc_state == DSC_DELETE_PEND) {
 744                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 745                 return;
 746         }
 747
 748         if (!sess->se_sess) {
 749                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 750
 751                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 752                 sess = qlt_create_sess(vha, fcport, false);
 753                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 754
 755                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 756         } else {
 757                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 758                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 759                         return;
 760                 }
 761
 762                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 763                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 764                             "%s: kref_get fail sess %8phC \n",
 765                             __func__, sess->port_name);
 766                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 767                         return;
 768                 }
 769
 770                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 771                     "qla_target(%u): %ssession for port %8phC "
 772                     "(loop ID %d) reappeared\n", vha->vp_idx,
 773                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 774
 775                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 776                     "Reappeared sess %p\n", sess);
 777
 778                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 779                     fcport->loop_id,
 780                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 781         }
 782
 783         if (sess && sess->local) {
 784                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 785                     "qla_target(%u): local session for "
 786                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 787                     fcport->port_name, sess->loop_id);
 788                 sess->local = 0;
 789         }
 790         ha->tgt.tgt_ops->put_sess(sess);
 791         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 792 }
 793
 794 /*
 795  * This is a zero-base ref-counting solution, since hardware_lock
 796  * guarantees that ref_count is not modified concurrently.
 797  * Upon successful return content of iocb is undefined
 798  */
 799 static struct qlt_plogi_ack_t *
 800 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 801                        struct imm_ntfy_from_isp *iocb)
 802 {
 803         struct qlt_plogi_ack_t *pla;
 804
 805         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 806                 if (pla->id.b24 == id->b24) {
 807                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 808                             "%s %d %8phC Term INOT due to new INOT",
 809                             __func__, __LINE__,
 810                             pla->iocb.u.isp24.port_name);
 811                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 812                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 813                         return pla;
 814                 }
 815         }
 816
 817         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 818         if (!pla) {
 819                 ql_dbg(ql_dbg_async, vha, 0x5088,
 820                        "qla_target(%d): Allocation of plogi_ack failed\n",
 821                        vha->vp_idx);
 822                 return NULL;
 823         }
 824
 825         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 826         pla->id = *id;
 827         list_add_tail(&pla->list, &vha->plogi_ack_list);
 828
 829         return pla;
 830 }
 831
 832 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 833     struct qlt_plogi_ack_t *pla)
 834 {
 835         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 836         port_id_t port_id;
 837         uint16_t loop_id;
 838         fc_port_t *fcport = pla->fcport;
 839
 840         BUG_ON(!pla->ref_count);
 841         pla->ref_count--;
 842
 843         if (pla->ref_count)
 844                 return;
 845
 846         ql_dbg(ql_dbg_disc, vha, 0x5089,
 847             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 848             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 849             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 850             iocb->u.isp24.port_id[0],
 851             le16_to_cpu(iocb->u.isp24.nport_handle),
 852             iocb->u.isp24.exchange_address, iocb->ox_id);
 853
 854         port_id.b.domain = iocb->u.isp24.port_id[2];
 855         port_id.b.area   = iocb->u.isp24.port_id[1];
 856         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 857         port_id.b.rsvd_1 = 0;
 858
 859         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 860
 861         fcport->loop_id = loop_id;
 862         fcport->d_id = port_id;
 863         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 864                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 865         else
 866                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 867
 868         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 869                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 870                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 871                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 872                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 873         }
 874
 875         list_del(&pla->list);
 876         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 877 }
 878
 879 void
 880 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 881     struct fc_port *sess, enum qlt_plogi_link_t link)
 882 {
 883         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 884         /* Inc ref_count first because link might already be pointing at pla */
 885         pla->ref_count++;
 886
 887         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 888                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 889                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 890                 sess, link, sess->port_name,
 891                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 892                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 893                 pla->ref_count, pla, link);
 894
 895         if (link == QLT_PLOGI_LINK_CONFLICT) {
 896                 switch (sess->disc_state) {
 897                 case DSC_DELETED:
 898                 case DSC_DELETE_PEND:
 899                         pla->ref_count--;
 900                         return;
 901                 default:
 902                         break;
 903                 }
 904         }
 905
 906         if (sess->plogi_link[link])
 907                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 908
 909         if (link == QLT_PLOGI_LINK_SAME_WWN)
 910                 pla->fcport = sess;
 911
 912         sess->plogi_link[link] = pla;
 913 }
 914
 915 typedef struct {
 916         /* These fields must be initialized by the caller */
 917         port_id_t id;
 918         /*
 919          * number of cmds dropped while we were waiting for
 920          * initiator to ack LOGO initialize to 1 if LOGO is
 921          * triggered by a command, otherwise, to 0
 922          */
 923         int cmd_count;
 924
 925         /* These fields are used by callee */
 926         struct list_head list;
 927 } qlt_port_logo_t;
 928
 929 static void
 930 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 931 {
 932         qlt_port_logo_t *tmp;
 933         int res;
 934
 935         mutex_lock(&vha->vha_tgt.tgt_mutex);
 936
 937         list_for_each_entry(tmp, &vha->logo_list, list) {
 938                 if (tmp->id.b24 == logo->id.b24) {
 939                         tmp->cmd_count += logo->cmd_count;
 940                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 941                         return;
 942                 }
 943         }
 944
 945         list_add_tail(&logo->list, &vha->logo_list);
 946
 947         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 948
 949         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 950
 951         mutex_lock(&vha->vha_tgt.tgt_mutex);
 952         list_del(&logo->list);
 953         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 954
 955         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 956             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 957             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 958             logo->cmd_count, res);
 959 }
 960
 961 void qlt_free_session_done(struct work_struct *work)
 962 {
 963         struct fc_port *sess = container_of(work, struct fc_port,
 964             free_work);
 965         struct qla_tgt *tgt = sess->tgt;
 966         struct scsi_qla_host *vha = sess->vha;
 967         struct qla_hw_data *ha = vha->hw;
 968         unsigned long flags;
 969         bool logout_started = false;
 970         scsi_qla_host_t *base_vha;
 971         struct qlt_plogi_ack_t *own =
 972                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 973
 974         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 975                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 976                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 977                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 978                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 979                 sess->logout_on_delete, sess->keep_nport_handle,
 980                 sess->send_els_logo);
 981
 982         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 983                 if (sess->send_els_logo) {
 984                         qlt_port_logo_t logo;
 985
 986                         logo.id = sess->d_id;
 987                         logo.cmd_count = 0;
 988                         if (!own)
 989                                 qlt_send_first_logo(vha, &logo);
 990                         sess->send_els_logo = 0;
 991                 }
 992
 993                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 994                         int rc;
 995
 996                         if (!own ||
 997                             (own &&
 998                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 999                                 rc = qla2x00_post_async_logout_work(vha, sess,
1000                                     NULL);
1001                                 if (rc != QLA_SUCCESS)
1002                                         ql_log(ql_log_warn, vha, 0xf085,
1003                                             "Schedule logo failed sess %p rc %d\n",
1004                                             sess, rc);
1005                                 else
1006                                         logout_started = true;
1007                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1008                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1009                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1010                                     NULL);
1011                                 if (rc != QLA_SUCCESS)
1012                                         ql_log(ql_log_warn, vha, 0xf085,
1013                                             "Schedule PRLO failed sess %p rc %d\n",
1014                                             sess, rc);
1015                                 else
1016                                         logout_started = true;
1017                         }
1018                 }
1019         }
1020
1021         /*
1022          * Release the target session for FC Nexus from fabric module code.
1023          */
1024         if (sess->se_sess != NULL)
1025                 ha->tgt.tgt_ops->free_session(sess);
1026
1027         if (logout_started) {
1028                 bool traced = false;
1029
1030                 while (!READ_ONCE(sess->logout_completed)) {
1031                         if (!traced) {
1032                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1033                                         "%s: waiting for sess %p logout\n",
1034                                         __func__, sess);
1035                                 traced = true;
1036                         }
1037                         msleep(100);
1038                 }
1039
1040                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1041                     "%s: sess %p logout completed\n", __func__, sess);
1042         }
1043
1044         if (sess->logo_ack_needed) {
1045                 sess->logo_ack_needed = 0;
1046                 qla24xx_async_notify_ack(vha, sess,
1047                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1048         }
1049
1050         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1051         if (sess->se_sess) {
1052                 sess->se_sess = NULL;
1053                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1054                         tgt->sess_count--;
1055         }
1056
1057         sess->disc_state = DSC_DELETED;
1058         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1059         sess->deleted = QLA_SESS_DELETED;
1060
1061         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1062                 vha->fcport_count--;
1063                 sess->login_succ = 0;
1064         }
1065
1066         qla2x00_clear_loop_id(sess);
1067
1068         if (sess->conflict) {
1069                 sess->conflict->login_pause = 0;
1070                 sess->conflict = NULL;
1071                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1072                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1073         }
1074
1075         {
1076                 struct qlt_plogi_ack_t *con =
1077                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1078                 struct imm_ntfy_from_isp *iocb;
1079                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1080
1081                 if (con) {
1082                         iocb = &con->iocb;
1083                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1084                                  "se_sess %p / sess %p port %8phC is gone,"
1085                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1086                                  sess->se_sess, sess, sess->port_name,
1087                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1088                                  own ? own->ref_count : -1,
1089                                  iocb->u.isp24.port_name, con->ref_count);
1090                         qlt_plogi_ack_unref(vha, con);
1091                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1092                 } else {
1093                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1094                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1095                             sess->se_sess, sess, sess->port_name,
1096                             own ? "releasing own PLOGI" :
1097                             "no own PLOGI pending",
1098                             own ? own->ref_count : -1);
1099                 }
1100
1101                 if (own) {
1102                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1103                         qlt_plogi_ack_unref(vha, own);
1104                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1105                 }
1106         }
1107
1108         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1109
1110         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1111             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1112                 sess, sess->port_name, vha->fcport_count);
1113
1114         if (tgt && (tgt->sess_count == 0))
1115                 wake_up_all(&tgt->waitQ);
1116
1117         if (vha->fcport_count == 0)
1118                 wake_up_all(&vha->fcport_waitQ);
1119
1120         base_vha = pci_get_drvdata(ha->pdev);
1121
1122         sess->free_pending = 0;
1123
1124         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1125                 return;
1126
1127         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1128                 switch (vha->host->active_mode) {
1129                 case MODE_INITIATOR:
1130                 case MODE_DUAL:
1131                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1132                         qla2xxx_wake_dpc(vha);
1133                         break;
1134                 case MODE_TARGET:
1135                 default:
1136                         /* no-op */
1137                         break;
1138                 }
1139         }
1140 }
1141
1142 /* ha->tgt.sess_lock supposed to be held on entry */
1143 void qlt_unreg_sess(struct fc_port *sess)
1144 {
1145         struct scsi_qla_host *vha = sess->vha;
1146         unsigned long flags;
1147
1148         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1149             "%s sess %p for deletion %8phC\n",
1150             __func__, sess, sess->port_name);
1151
1152         spin_lock_irqsave(&sess->vha->work_lock, flags);
1153         if (sess->free_pending) {
1154                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1155                 return;
1156         }
1157         sess->free_pending = 1;
1158         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1159
1160         if (sess->se_sess)
1161                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1162
1163         qla2x00_mark_device_lost(vha, sess, 0, 0);
1164
1165         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1166         sess->disc_state = DSC_DELETE_PEND;
1167         sess->last_rscn_gen = sess->rscn_gen;
1168         sess->last_login_gen = sess->login_gen;
1169
1170         if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1171             !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1172                 sess->nvme_flag |= NVME_FLAG_DELETING;
1173                 schedule_work(&sess->nvme_del_work);
1174         } else {
1175                 INIT_WORK(&sess->free_work, qlt_free_session_done);
1176                 schedule_work(&sess->free_work);
1177         }
1178 }
1179 EXPORT_SYMBOL(qlt_unreg_sess);
1180
1181 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1182 {
1183         struct qla_hw_data *ha = vha->hw;
1184         struct fc_port *sess = NULL;
1185         uint16_t loop_id;
1186         int res = 0;
1187         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1188         unsigned long flags;
1189
1190         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1191         if (loop_id == 0xFFFF) {
1192                 /* Global event */
1193                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1194                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1195                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1196                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1197         } else {
1198                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1199                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1200                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1201         }
1202
1203         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1204             "Using sess for qla_tgt_reset: %p\n", sess);
1205         if (!sess) {
1206                 res = -ESRCH;
1207                 return res;
1208         }
1209
1210         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1211             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1212             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1213             mcmd, loop_id);
1214
1215         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1216 }
1217
1218 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1219 {
1220         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1221                 sess->logout_on_delete = 0;
1222                 sess->logo_ack_needed = 0;
1223                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1224                 sess->scan_state = 0;
1225         }
1226 }
1227
1228 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1229 {
1230         struct qla_tgt *tgt = sess->tgt;
1231         unsigned long flags;
1232         u16 sec;
1233
1234         switch (sess->disc_state) {
1235         case DSC_DELETE_PEND:
1236                 return;
1237         case DSC_DELETED:
1238                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1239                         wake_up_all(&tgt->waitQ);
1240                 if (sess->vha->fcport_count == 0)
1241                         wake_up_all(&sess->vha->fcport_waitQ);
1242
1243                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1244                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1245                         return;
1246                 break;
1247         case DSC_UPD_FCPORT:
1248                 /*
1249                  * This port is not done reporting to upper layer.
1250                  * let it finish
1251                  */
1252                 sess->next_disc_state = DSC_DELETE_PEND;
1253                 sec = jiffies_to_msecs(jiffies -
1254                     sess->jiffies_at_registration)/1000;
1255                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1256                         sess->sec_since_registration = sec;
1257                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1258                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1259                             __func__, sess->port_name, sec);
1260                 }
1261                 return;
1262         default:
1263                 break;
1264         }
1265
1266         spin_lock_irqsave(&sess->vha->work_lock, flags);
1267         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1268                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1269                 return;
1270         }
1271         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1272         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1273
1274         sess->disc_state = DSC_DELETE_PEND;
1275
1276         qla24xx_chk_fcp_state(sess);
1277
1278         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1279             "Scheduling sess %p for deletion %8phC\n",
1280             sess, sess->port_name);
1281
1282         INIT_WORK(&sess->del_work, qla24xx_delete_sess_fn);
1283         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1284 }
1285
1286 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1287 {
1288         struct fc_port *sess;
1289         scsi_qla_host_t *vha = tgt->vha;
1290
1291         list_for_each_entry(sess, &vha->vp_fcports, list) {
1292                 if (sess->se_sess)
1293                         qlt_schedule_sess_for_deletion(sess);
1294         }
1295
1296         /* At this point tgt could be already dead */
1297 }
1298
1299 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1300         uint16_t *loop_id)
1301 {
1302         struct qla_hw_data *ha = vha->hw;
1303         dma_addr_t gid_list_dma;
1304         struct gid_list_info *gid_list;
1305         char *id_iter;
1306         int res, rc, i;
1307         uint16_t entries;
1308
1309         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1310             &gid_list_dma, GFP_KERNEL);
1311         if (!gid_list) {
1312                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1313                     "qla_target(%d): DMA Alloc failed of %u\n",
1314                     vha->vp_idx, qla2x00_gid_list_size(ha));
1315                 return -ENOMEM;
1316         }
1317
1318         /* Get list of logged in devices */
1319         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1320         if (rc != QLA_SUCCESS) {
1321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1322                     "qla_target(%d): get_id_list() failed: %x\n",
1323                     vha->vp_idx, rc);
1324                 res = -EBUSY;
1325                 goto out_free_id_list;
1326         }
1327
1328         id_iter = (char *)gid_list;
1329         res = -ENOENT;
1330         for (i = 0; i < entries; i++) {
1331                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1332                 if ((gid->al_pa == s_id[2]) &&
1333                     (gid->area == s_id[1]) &&
1334                     (gid->domain == s_id[0])) {
1335                         *loop_id = le16_to_cpu(gid->loop_id);
1336                         res = 0;
1337                         break;
1338                 }
1339                 id_iter += ha->gid_list_info_size;
1340         }
1341
1342 out_free_id_list:
1343         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1344             gid_list, gid_list_dma);
1345         return res;
1346 }
1347
1348 /*
1349  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1350  * Caller must put it.
1351  */
1352 static struct fc_port *qlt_create_sess(
1353         struct scsi_qla_host *vha,
1354         fc_port_t *fcport,
1355         bool local)
1356 {
1357         struct qla_hw_data *ha = vha->hw;
1358         struct fc_port *sess = fcport;
1359         unsigned long flags;
1360
1361         if (vha->vha_tgt.qla_tgt->tgt_stop)
1362                 return NULL;
1363
1364         if (fcport->se_sess) {
1365                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1366                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1367                             "%s: kref_get_unless_zero failed for %8phC\n",
1368                             __func__, sess->port_name);
1369                         return NULL;
1370                 }
1371                 return fcport;
1372         }
1373         sess->tgt = vha->vha_tgt.qla_tgt;
1374         sess->local = local;
1375
1376         /*
1377          * Under normal circumstances we want to logout from firmware when
1378          * session eventually ends and release corresponding nport handle.
1379          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1380          * code will adjust these flags as necessary.
1381          */
1382         sess->logout_on_delete = 1;
1383         sess->keep_nport_handle = 0;
1384         sess->logout_completed = 0;
1385
1386         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1387             &fcport->port_name[0], sess) < 0) {
1388                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1389                     "(%d) %8phC check_initiator_node_acl failed\n",
1390                     vha->vp_idx, fcport->port_name);
1391                 return NULL;
1392         } else {
1393                 kref_init(&fcport->sess_kref);
1394                 /*
1395                  * Take an extra reference to ->sess_kref here to handle
1396                  * fc_port access across ->tgt.sess_lock reaquire.
1397                  */
1398                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1399                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1400                             "%s: kref_get_unless_zero failed for %8phC\n",
1401                             __func__, sess->port_name);
1402                         return NULL;
1403                 }
1404
1405                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1406                 if (!IS_SW_RESV_ADDR(sess->d_id))
1407                         vha->vha_tgt.qla_tgt->sess_count++;
1408
1409                 qlt_do_generation_tick(vha, &sess->generation);
1410                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1411         }
1412
1413         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1414             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1415             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1416             vha->vha_tgt.qla_tgt->sess_count);
1417
1418         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1419             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1420             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1421             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1422             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1423             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1424
1425         return sess;
1426 }
1427
1428 /*
1429  * max_gen - specifies maximum session generation
1430  * at which this deletion requestion is still valid
1431  */
1432 void
1433 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1434 {
1435         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1436         struct fc_port *sess = fcport;
1437         unsigned long flags;
1438
1439         if (!vha->hw->tgt.tgt_ops)
1440                 return;
1441
1442         if (!tgt)
1443                 return;
1444
1445         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1446         if (tgt->tgt_stop) {
1447                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1448                 return;
1449         }
1450         if (!sess->se_sess) {
1451                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1452                 return;
1453         }
1454
1455         if (max_gen - sess->generation < 0) {
1456                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1457                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1458                     "Ignoring stale deletion request for se_sess %p / sess %p"
1459                     " for port %8phC, req_gen %d, sess_gen %d\n",
1460                     sess->se_sess, sess, sess->port_name, max_gen,
1461                     sess->generation);
1462                 return;
1463         }
1464
1465         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1466
1467         sess->local = 1;
1468         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1469         qlt_schedule_sess_for_deletion(sess);
1470 }
1471
1472 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1473 {
1474         struct qla_hw_data *ha = tgt->ha;
1475         unsigned long flags;
1476         int res;
1477         /*
1478          * We need to protect against race, when tgt is freed before or
1479          * inside wake_up()
1480          */
1481         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1482         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1483             "tgt %p, sess_count=%d\n",
1484             tgt, tgt->sess_count);
1485         res = (tgt->sess_count == 0);
1486         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1487
1488         return res;
1489 }
1490
1491 /* Called by tcm_qla2xxx configfs code */
1492 int qlt_stop_phase1(struct qla_tgt *tgt)
1493 {
1494         struct scsi_qla_host *vha = tgt->vha;
1495         struct qla_hw_data *ha = tgt->ha;
1496         unsigned long flags;
1497
1498         mutex_lock(&ha->optrom_mutex);
1499         mutex_lock(&qla_tgt_mutex);
1500
1501         if (tgt->tgt_stop || tgt->tgt_stopped) {
1502                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1503                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1504                 mutex_unlock(&qla_tgt_mutex);
1505                 mutex_unlock(&ha->optrom_mutex);
1506                 return -EPERM;
1507         }
1508
1509         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1510             vha->host_no, vha);
1511         /*
1512          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1513          * Lock is needed, because we still can get an incoming packet.
1514          */
1515         mutex_lock(&vha->vha_tgt.tgt_mutex);
1516         tgt->tgt_stop = 1;
1517         qlt_clear_tgt_db(tgt);
1518         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1519         mutex_unlock(&qla_tgt_mutex);
1520
1521         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1522             "Waiting for sess works (tgt %p)", tgt);
1523         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1524         while (!list_empty(&tgt->sess_works_list)) {
1525                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1526                 flush_scheduled_work();
1527                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1528         }
1529         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1530
1531         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1532             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1533
1534         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1535
1536         /* Big hammer */
1537         if (!ha->flags.host_shutting_down &&
1538             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1539                 qlt_disable_vha(vha);
1540
1541         /* Wait for sessions to clear out (just in case) */
1542         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1543         mutex_unlock(&ha->optrom_mutex);
1544
1545         return 0;
1546 }
1547 EXPORT_SYMBOL(qlt_stop_phase1);
1548
1549 /* Called by tcm_qla2xxx configfs code */
1550 void qlt_stop_phase2(struct qla_tgt *tgt)
1551 {
1552         scsi_qla_host_t *vha = tgt->vha;
1553
1554         if (tgt->tgt_stopped) {
1555                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1556                     "Already in tgt->tgt_stopped state\n");
1557                 dump_stack();
1558                 return;
1559         }
1560         if (!tgt->tgt_stop) {
1561                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1562                     "%s: phase1 stop is not completed\n", __func__);
1563                 dump_stack();
1564                 return;
1565         }
1566
1567         mutex_lock(&vha->vha_tgt.tgt_mutex);
1568         tgt->tgt_stop = 0;
1569         tgt->tgt_stopped = 1;
1570         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1571
1572         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1573             tgt);
1574
1575         switch (vha->qlini_mode) {
1576         case QLA2XXX_INI_MODE_EXCLUSIVE:
1577                 vha->flags.online = 1;
1578                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1579                 break;
1580         default:
1581                 break;
1582         }
1583 }
1584 EXPORT_SYMBOL(qlt_stop_phase2);
1585
1586 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1587 static void qlt_release(struct qla_tgt *tgt)
1588 {
1589         scsi_qla_host_t *vha = tgt->vha;
1590         void *node;
1591         u64 key = 0;
1592         u16 i;
1593         struct qla_qpair_hint *h;
1594         struct qla_hw_data *ha = vha->hw;
1595
1596         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1597             !tgt->tgt_stopped)
1598                 qlt_stop_phase1(tgt);
1599
1600         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1601                 qlt_stop_phase2(tgt);
1602
1603         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1604                 unsigned long flags;
1605
1606                 h = &tgt->qphints[i];
1607                 if (h->qpair) {
1608                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1609                         list_del(&h->hint_elem);
1610                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1611                         h->qpair = NULL;
1612                 }
1613         }
1614         kfree(tgt->qphints);
1615         mutex_lock(&qla_tgt_mutex);
1616         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1617         mutex_unlock(&qla_tgt_mutex);
1618
1619         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1620                 btree_remove64(&tgt->lun_qpair_map, key);
1621
1622         btree_destroy64(&tgt->lun_qpair_map);
1623
1624         if (vha->vp_idx)
1625                 if (ha->tgt.tgt_ops &&
1626                     ha->tgt.tgt_ops->remove_target &&
1627                     vha->vha_tgt.target_lport_ptr)
1628                         ha->tgt.tgt_ops->remove_target(vha);
1629
1630         vha->vha_tgt.qla_tgt = NULL;
1631
1632         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1633             "Release of tgt %p finished\n", tgt);
1634
1635         kfree(tgt);
1636 }
1637
1638 /* ha->hardware_lock supposed to be held on entry */
1639 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1640         const void *param, unsigned int param_size)
1641 {
1642         struct qla_tgt_sess_work_param *prm;
1643         unsigned long flags;
1644
1645         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1646         if (!prm) {
1647                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1648                     "qla_target(%d): Unable to create session "
1649                     "work, command will be refused", 0);
1650                 return -ENOMEM;
1651         }
1652
1653         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1654             "Scheduling work (type %d, prm %p)"
1655             " to find session for param %p (size %d, tgt %p)\n",
1656             type, prm, param, param_size, tgt);
1657
1658         prm->type = type;
1659         memcpy(&prm->tm_iocb, param, param_size);
1660
1661         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1662         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1663         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1664
1665         schedule_work(&tgt->sess_work);
1666
1667         return 0;
1668 }
1669
1670 /*
1671  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1672  */
1673 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1674         struct imm_ntfy_from_isp *ntfy,
1675         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1676         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1677 {
1678         struct scsi_qla_host *vha = qpair->vha;
1679         struct qla_hw_data *ha = vha->hw;
1680         request_t *pkt;
1681         struct nack_to_isp *nack;
1682
1683         if (!ha->flags.fw_started)
1684                 return;
1685
1686         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1687
1688         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1689         if (!pkt) {
1690                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1691                     "qla_target(%d): %s failed: unable to allocate "
1692                     "request packet\n", vha->vp_idx, __func__);
1693                 return;
1694         }
1695
1696         if (vha->vha_tgt.qla_tgt != NULL)
1697                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1698
1699         pkt->entry_type = NOTIFY_ACK_TYPE;
1700         pkt->entry_count = 1;
1701
1702         nack = (struct nack_to_isp *)pkt;
1703         nack->ox_id = ntfy->ox_id;
1704
1705         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1706         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1707         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1708                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1709                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1710         }
1711         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1712         nack->u.isp24.status = ntfy->u.isp24.status;
1713         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1714         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1715         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1716         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1717         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1718         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1719         nack->u.isp24.srr_reject_code = srr_reject_code;
1720         nack->u.isp24.srr_reject_code_expl = srr_explan;
1721         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1722
1723         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1724             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1725             vha->vp_idx, nack->u.isp24.status);
1726
1727         /* Memory Barrier */
1728         wmb();
1729         qla2x00_start_iocbs(vha, qpair->req);
1730 }
1731
1732 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1733 {
1734         struct scsi_qla_host *vha = mcmd->vha;
1735         struct qla_hw_data *ha = vha->hw;
1736         struct abts_resp_to_24xx *resp;
1737         uint32_t f_ctl, h;
1738         uint8_t *p;
1739         int rc;
1740         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1741         struct qla_qpair *qpair = mcmd->qpair;
1742
1743         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1744             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1745             ha, mcmd->fc_tm_rsp);
1746
1747         rc = qlt_check_reserve_free_req(qpair, 1);
1748         if (rc) {
1749                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1750                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1751                     vha->vp_idx, __func__);
1752                 return -EAGAIN;
1753         }
1754
1755         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1756         memset(resp, 0, sizeof(*resp));
1757
1758         h = qlt_make_handle(qpair);
1759         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1760                 /*
1761                  * CTIO type 7 from the firmware doesn't provide a way to
1762                  * know the initiator's LOOP ID, hence we can't find
1763                  * the session and, so, the command.
1764                  */
1765                 return -EAGAIN;
1766         } else {
1767                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1768         }
1769
1770         resp->handle = MAKE_HANDLE(qpair->req->id, h);
1771         resp->entry_type = ABTS_RESP_24XX;
1772         resp->entry_count = 1;
1773         resp->nport_handle = abts->nport_handle;
1774         resp->vp_index = vha->vp_idx;
1775         resp->sof_type = abts->sof_type;
1776         resp->exchange_address = abts->exchange_address;
1777         resp->fcp_hdr_le = abts->fcp_hdr_le;
1778         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1779             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1780             F_CTL_SEQ_INITIATIVE);
1781         p = (uint8_t *)&f_ctl;
1782         resp->fcp_hdr_le.f_ctl[0] = *p++;
1783         resp->fcp_hdr_le.f_ctl[1] = *p++;
1784         resp->fcp_hdr_le.f_ctl[2] = *p;
1785
1786         resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1787         resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1788         resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1789         resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1790         resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1791         resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1792
1793         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1794         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1795                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1796                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1797                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1798                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1799                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1800                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1801         } else {
1802                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1803                 resp->payload.ba_rjt.reason_code =
1804                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1805                 /* Other bytes are zero */
1806         }
1807
1808         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1809
1810         /* Memory Barrier */
1811         wmb();
1812         if (qpair->reqq_start_iocbs)
1813                 qpair->reqq_start_iocbs(qpair);
1814         else
1815                 qla2x00_start_iocbs(vha, qpair->req);
1816
1817         return rc;
1818 }
1819
1820 /*
1821  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1822  */
1823 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1824         struct abts_recv_from_24xx *abts, uint32_t status,
1825         bool ids_reversed)
1826 {
1827         struct scsi_qla_host *vha = qpair->vha;
1828         struct qla_hw_data *ha = vha->hw;
1829         struct abts_resp_to_24xx *resp;
1830         uint32_t f_ctl;
1831         uint8_t *p;
1832
1833         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1834             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1835             ha, abts, status);
1836
1837         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1838             NULL);
1839         if (!resp) {
1840                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1841                     "qla_target(%d): %s failed: unable to allocate "
1842                     "request packet", vha->vp_idx, __func__);
1843                 return;
1844         }
1845
1846         resp->entry_type = ABTS_RESP_24XX;
1847         resp->handle = QLA_TGT_SKIP_HANDLE;
1848         resp->entry_count = 1;
1849         resp->nport_handle = abts->nport_handle;
1850         resp->vp_index = vha->vp_idx;
1851         resp->sof_type = abts->sof_type;
1852         resp->exchange_address = abts->exchange_address;
1853         resp->fcp_hdr_le = abts->fcp_hdr_le;
1854         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1855             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1856             F_CTL_SEQ_INITIATIVE);
1857         p = (uint8_t *)&f_ctl;
1858         resp->fcp_hdr_le.f_ctl[0] = *p++;
1859         resp->fcp_hdr_le.f_ctl[1] = *p++;
1860         resp->fcp_hdr_le.f_ctl[2] = *p;
1861         if (ids_reversed) {
1862                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1863                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1864                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1865                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1866                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1867                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1868         } else {
1869                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1870                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1871                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1872                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1873                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1874                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1875         }
1876         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1877         if (status == FCP_TMF_CMPL) {
1878                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1879                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1880                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1881                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1882                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1883                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1884         } else {
1885                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1886                 resp->payload.ba_rjt.reason_code =
1887                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1888                 /* Other bytes are zero */
1889         }
1890
1891         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1892
1893         /* Memory Barrier */
1894         wmb();
1895         if (qpair->reqq_start_iocbs)
1896                 qpair->reqq_start_iocbs(qpair);
1897         else
1898                 qla2x00_start_iocbs(vha, qpair->req);
1899 }
1900
1901 /*
1902  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1903  */
1904 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1905     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1906 {
1907         struct ctio7_to_24xx *ctio;
1908         u16 tmp;
1909         struct abts_recv_from_24xx *entry;
1910
1911         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1912         if (ctio == NULL) {
1913                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1914                     "qla_target(%d): %s failed: unable to allocate "
1915                     "request packet\n", vha->vp_idx, __func__);
1916                 return;
1917         }
1918
1919         if (mcmd)
1920                 /* abts from remote port */
1921                 entry = &mcmd->orig_iocb.abts;
1922         else
1923                 /* abts from this driver.  */
1924                 entry = (struct abts_recv_from_24xx *)pkt;
1925
1926         /*
1927          * We've got on entrance firmware's response on by us generated
1928          * ABTS response. So, in it ID fields are reversed.
1929          */
1930
1931         ctio->entry_type = CTIO_TYPE7;
1932         ctio->entry_count = 1;
1933         ctio->nport_handle = entry->nport_handle;
1934         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1935         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1936         ctio->vp_index = vha->vp_idx;
1937         ctio->exchange_addr = entry->exchange_addr_to_abort;
1938         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1939
1940         if (mcmd) {
1941                 ctio->initiator_id[0] = entry->fcp_hdr_le.s_id[0];
1942                 ctio->initiator_id[1] = entry->fcp_hdr_le.s_id[1];
1943                 ctio->initiator_id[2] = entry->fcp_hdr_le.s_id[2];
1944
1945                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1946                         tmp |= (mcmd->abort_io_attr << 9);
1947                 else if (qpair->retry_term_cnt & 1)
1948                         tmp |= (0x4 << 9);
1949         } else {
1950                 ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1951                 ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1952                 ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1953
1954                 if (qpair->retry_term_cnt & 1)
1955                         tmp |= (0x4 << 9);
1956         }
1957         ctio->u.status1.flags = cpu_to_le16(tmp);
1958         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1959
1960         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1961             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1962             le16_to_cpu(ctio->u.status1.flags),
1963             le16_to_cpu(ctio->u.status1.ox_id),
1964             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1965
1966         /* Memory Barrier */
1967         wmb();
1968         if (qpair->reqq_start_iocbs)
1969                 qpair->reqq_start_iocbs(qpair);
1970         else
1971                 qla2x00_start_iocbs(vha, qpair->req);
1972
1973         if (mcmd)
1974                 qlt_build_abts_resp_iocb(mcmd);
1975         else
1976                 qlt_24xx_send_abts_resp(qpair,
1977                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1978
1979 }
1980
1981 /* drop cmds for the given lun
1982  * XXX only looks for cmds on the port through which lun reset was recieved
1983  * XXX does not go through the list of other port (which may have cmds
1984  *     for the same lun)
1985  */
1986 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1987                                 u64 lun, uint8_t *s_id)
1988 {
1989         struct qla_tgt_sess_op *op;
1990         struct qla_tgt_cmd *cmd;
1991         uint32_t key;
1992         unsigned long flags;
1993
1994         key = sid_to_key(s_id);
1995         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1996         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1997                 uint32_t op_key;
1998                 u64 op_lun;
1999
2000                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2001                 op_lun = scsilun_to_int(
2002                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2003                 if (op_key == key && op_lun == lun)
2004                         op->aborted = true;
2005         }
2006
2007         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2008                 uint32_t op_key;
2009                 u64 op_lun;
2010
2011                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2012                 op_lun = scsilun_to_int(
2013                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2014                 if (op_key == key && op_lun == lun)
2015                         op->aborted = true;
2016         }
2017
2018         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2019                 uint32_t cmd_key;
2020                 u64 cmd_lun;
2021
2022                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2023                 cmd_lun = scsilun_to_int(
2024                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2025                 if (cmd_key == key && cmd_lun == lun)
2026                         cmd->aborted = 1;
2027         }
2028         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2029 }
2030
2031 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2032     uint64_t unpacked_lun)
2033 {
2034         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2035         struct qla_qpair_hint *h = NULL;
2036
2037         if (vha->flags.qpairs_available) {
2038                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2039                 if (!h)
2040                         h = &tgt->qphints[0];
2041         } else {
2042                 h = &tgt->qphints[0];
2043         }
2044
2045         return h;
2046 }
2047
2048 static void qlt_do_tmr_work(struct work_struct *work)
2049 {
2050         struct qla_tgt_mgmt_cmd *mcmd =
2051                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2052         struct qla_hw_data *ha = mcmd->vha->hw;
2053         int rc = EIO;
2054         uint32_t tag;
2055         unsigned long flags;
2056
2057         switch (mcmd->tmr_func) {
2058         case QLA_TGT_ABTS:
2059                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
2060                 break;
2061         default:
2062                 tag = 0;
2063                 break;
2064         }
2065
2066         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2067             mcmd->tmr_func, tag);
2068
2069         if (rc != 0) {
2070                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2071                 switch (mcmd->tmr_func) {
2072                 case QLA_TGT_ABTS:
2073                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2074                         qlt_build_abts_resp_iocb(mcmd);
2075                         break;
2076                 case QLA_TGT_LUN_RESET:
2077                 case QLA_TGT_CLEAR_TS:
2078                 case QLA_TGT_ABORT_TS:
2079                 case QLA_TGT_CLEAR_ACA:
2080                 case QLA_TGT_TARGET_RESET:
2081                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2082                             qla_sam_status);
2083                         break;
2084
2085                 case QLA_TGT_ABORT_ALL:
2086                 case QLA_TGT_NEXUS_LOSS_SESS:
2087                 case QLA_TGT_NEXUS_LOSS:
2088                         qlt_send_notify_ack(mcmd->qpair,
2089                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2090                         break;
2091                 }
2092                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2093
2094                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2095                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2096                     mcmd->vha->vp_idx, rc);
2097                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2098         }
2099 }
2100
2101 /* ha->hardware_lock supposed to be held on entry */
2102 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2103         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2104 {
2105         struct qla_hw_data *ha = vha->hw;
2106         struct qla_tgt_mgmt_cmd *mcmd;
2107         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2108
2109         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2110             "qla_target(%d): task abort (tag=%d)\n",
2111             vha->vp_idx, abts->exchange_addr_to_abort);
2112
2113         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2114         if (mcmd == NULL) {
2115                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2116                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2117                     vha->vp_idx, __func__);
2118                 return -ENOMEM;
2119         }
2120         memset(mcmd, 0, sizeof(*mcmd));
2121         mcmd->cmd_type = TYPE_TGT_TMCMD;
2122         mcmd->sess = sess;
2123         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2124         mcmd->reset_count = ha->base_qpair->chip_reset;
2125         mcmd->tmr_func = QLA_TGT_ABTS;
2126         mcmd->qpair = h->qpair;
2127         mcmd->vha = vha;
2128
2129         /*
2130          * LUN is looked up by target-core internally based on the passed
2131          * abts->exchange_addr_to_abort tag.
2132          */
2133         mcmd->se_cmd.cpuid = h->cpuid;
2134
2135         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2136                 struct qla_tgt_cmd *abort_cmd;
2137
2138                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2139                     abts->exchange_addr_to_abort);
2140                 if (abort_cmd && abort_cmd->qpair) {
2141                         mcmd->qpair = abort_cmd->qpair;
2142                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2143                         mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2144                         mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2145                 }
2146         }
2147
2148         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2149         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2150
2151         return 0;
2152 }
2153
2154 /*
2155  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2156  */
2157 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2158         struct abts_recv_from_24xx *abts)
2159 {
2160         struct qla_hw_data *ha = vha->hw;
2161         struct fc_port *sess;
2162         uint32_t tag = abts->exchange_addr_to_abort;
2163         uint8_t s_id[3];
2164         int rc;
2165         unsigned long flags;
2166
2167         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2168                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2169                     "qla_target(%d): ABTS: Abort Sequence not "
2170                     "supported\n", vha->vp_idx);
2171                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2172                     false);
2173                 return;
2174         }
2175
2176         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2177                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2178                     "qla_target(%d): ABTS: Unknown Exchange "
2179                     "Address received\n", vha->vp_idx);
2180                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2181                     false);
2182                 return;
2183         }
2184
2185         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2186             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2187             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2188             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2189             le32_to_cpu(abts->fcp_hdr_le.parameter));
2190
2191         s_id[0] = abts->fcp_hdr_le.s_id[2];
2192         s_id[1] = abts->fcp_hdr_le.s_id[1];
2193         s_id[2] = abts->fcp_hdr_le.s_id[0];
2194
2195         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2196         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2197         if (!sess) {
2198                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2199                     "qla_target(%d): task abort for non-existent session\n",
2200                     vha->vp_idx);
2201                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2202
2203                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2204                             false);
2205                 return;
2206         }
2207         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2208
2209
2210         if (sess->deleted) {
2211                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2212                     false);
2213                 return;
2214         }
2215
2216         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2217         if (rc != 0) {
2218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2219                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2220                     vha->vp_idx, rc);
2221                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2222                     false);
2223                 return;
2224         }
2225 }
2226
2227 /*
2228  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2229  */
2230 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2231         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2232 {
2233         struct scsi_qla_host *ha = mcmd->vha;
2234         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2235         struct ctio7_to_24xx *ctio;
2236         uint16_t temp;
2237
2238         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2239             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2240             ha, atio, resp_code);
2241
2242
2243         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2244         if (ctio == NULL) {
2245                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2246                     "qla_target(%d): %s failed: unable to allocate "
2247                     "request packet\n", ha->vp_idx, __func__);
2248                 return;
2249         }
2250
2251         ctio->entry_type = CTIO_TYPE7;
2252         ctio->entry_count = 1;
2253         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2254         ctio->nport_handle = mcmd->sess->loop_id;
2255         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2256         ctio->vp_index = ha->vp_idx;
2257         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2258         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2259         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2260         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2261         temp = (atio->u.isp24.attr << 9)|
2262                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2263         ctio->u.status1.flags = cpu_to_le16(temp);
2264         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2265         ctio->u.status1.ox_id = cpu_to_le16(temp);
2266         ctio->u.status1.scsi_status =
2267             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2268         ctio->u.status1.response_len = cpu_to_le16(8);
2269         ctio->u.status1.sense_data[0] = resp_code;
2270
2271         /* Memory Barrier */
2272         wmb();
2273         if (qpair->reqq_start_iocbs)
2274                 qpair->reqq_start_iocbs(qpair);
2275         else
2276                 qla2x00_start_iocbs(ha, qpair->req);
2277 }
2278
2279 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2280 {
2281         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2282 }
2283 EXPORT_SYMBOL(qlt_free_mcmd);
2284
2285 /*
2286  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2287  * reacquire
2288  */
2289 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2290     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2291 {
2292         struct atio_from_isp *atio = &cmd->atio;
2293         struct ctio7_to_24xx *ctio;
2294         uint16_t temp;
2295         struct scsi_qla_host *vha = cmd->vha;
2296
2297         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2298             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2299             "sense_key=%02x, asc=%02x, ascq=%02x",
2300             vha, atio, scsi_status, sense_key, asc, ascq);
2301
2302         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2303         if (!ctio) {
2304                 ql_dbg(ql_dbg_async, vha, 0x3067,
2305                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2306                     vha->host_no, __func__);
2307                 goto out;
2308         }
2309
2310         ctio->entry_type = CTIO_TYPE7;
2311         ctio->entry_count = 1;
2312         ctio->handle = QLA_TGT_SKIP_HANDLE;
2313         ctio->nport_handle = cmd->sess->loop_id;
2314         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2315         ctio->vp_index = vha->vp_idx;
2316         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2317         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2318         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2319         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2320         temp = (atio->u.isp24.attr << 9) |
2321             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2322         ctio->u.status1.flags = cpu_to_le16(temp);
2323         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2324         ctio->u.status1.ox_id = cpu_to_le16(temp);
2325         ctio->u.status1.scsi_status =
2326             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2327         ctio->u.status1.response_len = cpu_to_le16(18);
2328         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2329
2330         if (ctio->u.status1.residual != 0)
2331                 ctio->u.status1.scsi_status |=
2332                     cpu_to_le16(SS_RESIDUAL_UNDER);
2333
2334         /* Response code and sense key */
2335         put_unaligned_le32(((0x70 << 24) | (sense_key << 8)),
2336             (&ctio->u.status1.sense_data)[0]);
2337         /* Additional sense length */
2338         put_unaligned_le32(0x0a, (&ctio->u.status1.sense_data)[1]);
2339         /* ASC and ASCQ */
2340         put_unaligned_le32(((asc << 24) | (ascq << 16)),
2341             (&ctio->u.status1.sense_data)[3]);
2342
2343         /* Memory Barrier */
2344         wmb();
2345
2346         if (qpair->reqq_start_iocbs)
2347                 qpair->reqq_start_iocbs(qpair);
2348         else
2349                 qla2x00_start_iocbs(vha, qpair->req);
2350
2351 out:
2352         return;
2353 }
2354
2355 /* callback from target fabric module code */
2356 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2357 {
2358         struct scsi_qla_host *vha = mcmd->sess->vha;
2359         struct qla_hw_data *ha = vha->hw;
2360         unsigned long flags;
2361         struct qla_qpair *qpair = mcmd->qpair;
2362         bool free_mcmd = true;
2363
2364         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2365             "TM response mcmd (%p) status %#x state %#x",
2366             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2367
2368         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2369
2370         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2371                 /*
2372                  * Either the port is not online or this request was from
2373                  * previous life, just abort the processing.
2374                  */
2375                 ql_dbg(ql_dbg_async, vha, 0xe100,
2376                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2377                         vha->flags.online, qla2x00_reset_active(vha),
2378                         mcmd->reset_count, qpair->chip_reset);
2379                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2380                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2381                 return;
2382         }
2383
2384         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2385                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2386                 case ELS_LOGO:
2387                 case ELS_PRLO:
2388                 case ELS_TPRLO:
2389                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2390                             "TM response logo %phC status %#x state %#x",
2391                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2392                             mcmd->flags);
2393                         qlt_schedule_sess_for_deletion(mcmd->sess);
2394                         break;
2395                 default:
2396                         qlt_send_notify_ack(vha->hw->base_qpair,
2397                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2398                         break;
2399                 }
2400         } else {
2401                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2402                         qlt_build_abts_resp_iocb(mcmd);
2403                         free_mcmd = false;
2404                 } else
2405                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2406                             mcmd->fc_tm_rsp);
2407         }
2408         /*
2409          * Make the callback for ->free_mcmd() to queue_work() and invoke
2410          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2411          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2412          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2413          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2414          * qlt_xmit_tm_rsp() returns here..
2415          */
2416         if (free_mcmd)
2417                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2418
2419         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2420 }
2421 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2422
2423 /* No locks */
2424 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2425 {
2426         struct qla_tgt_cmd *cmd = prm->cmd;
2427
2428         BUG_ON(cmd->sg_cnt == 0);
2429
2430         prm->sg = (struct scatterlist *)cmd->sg;
2431         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2432             cmd->sg_cnt, cmd->dma_data_direction);
2433         if (unlikely(prm->seg_cnt == 0))
2434                 goto out_err;
2435
2436         prm->cmd->sg_mapped = 1;
2437
2438         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2439                 /*
2440                  * If greater than four sg entries then we need to allocate
2441                  * the continuation entries
2442                  */
2443                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2444                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2445                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2446                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2447         } else {
2448                 /* DIF */
2449                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2450                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2451                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2452                         prm->tot_dsds = prm->seg_cnt;
2453                 } else
2454                         prm->tot_dsds = prm->seg_cnt;
2455
2456                 if (cmd->prot_sg_cnt) {
2457                         prm->prot_sg      = cmd->prot_sg;
2458                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2459                                 cmd->prot_sg, cmd->prot_sg_cnt,
2460                                 cmd->dma_data_direction);
2461                         if (unlikely(prm->prot_seg_cnt == 0))
2462                                 goto out_err;
2463
2464                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2465                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2466                                 /* Dif Bundling not support here */
2467                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2468                                                                 cmd->blk_sz);
2469                                 prm->tot_dsds += prm->prot_seg_cnt;
2470                         } else
2471                                 prm->tot_dsds += prm->prot_seg_cnt;
2472                 }
2473         }
2474
2475         return 0;
2476
2477 out_err:
2478         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2479             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2480             0, prm->cmd->sg_cnt);
2481         return -1;
2482 }
2483
2484 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2485 {
2486         struct qla_hw_data *ha;
2487         struct qla_qpair *qpair;
2488         if (!cmd->sg_mapped)
2489                 return;
2490
2491         qpair = cmd->qpair;
2492
2493         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2494             cmd->dma_data_direction);
2495         cmd->sg_mapped = 0;
2496
2497         if (cmd->prot_sg_cnt)
2498                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2499                         cmd->dma_data_direction);
2500
2501         if (!cmd->ctx)
2502                 return;
2503         ha = vha->hw;
2504         if (cmd->ctx_dsd_alloced)
2505                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2506
2507         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2508 }
2509
2510 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2511         uint32_t req_cnt)
2512 {
2513         uint32_t cnt;
2514         struct req_que *req = qpair->req;
2515
2516         if (req->cnt < (req_cnt + 2)) {
2517                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2518                     RD_REG_DWORD_RELAXED(req->req_q_out));
2519
2520                 if  (req->ring_index < cnt)
2521                         req->cnt = cnt - req->ring_index;
2522                 else
2523                         req->cnt = req->length - (req->ring_index - cnt);
2524
2525                 if (unlikely(req->cnt < (req_cnt + 2)))
2526                         return -EAGAIN;
2527         }
2528
2529         req->cnt -= req_cnt;
2530
2531         return 0;
2532 }
2533
2534 /*
2535  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2536  */
2537 static inline void *qlt_get_req_pkt(struct req_que *req)
2538 {
2539         /* Adjust ring index. */
2540         req->ring_index++;
2541         if (req->ring_index == req->length) {
2542                 req->ring_index = 0;
2543                 req->ring_ptr = req->ring;
2544         } else {
2545                 req->ring_ptr++;
2546         }
2547         return (cont_entry_t *)req->ring_ptr;
2548 }
2549
2550 /* ha->hardware_lock supposed to be held on entry */
2551 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2552 {
2553         uint32_t h;
2554         int index;
2555         uint8_t found = 0;
2556         struct req_que *req = qpair->req;
2557
2558         h = req->current_outstanding_cmd;
2559
2560         for (index = 1; index < req->num_outstanding_cmds; index++) {
2561                 h++;
2562                 if (h == req->num_outstanding_cmds)
2563                         h = 1;
2564
2565                 if (h == QLA_TGT_SKIP_HANDLE)
2566                         continue;
2567
2568                 if (!req->outstanding_cmds[h]) {
2569                         found = 1;
2570                         break;
2571                 }
2572         }
2573
2574         if (found) {
2575                 req->current_outstanding_cmd = h;
2576         } else {
2577                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2578                     "qla_target(%d): Ran out of empty cmd slots\n",
2579                     qpair->vha->vp_idx);
2580                 h = QLA_TGT_NULL_HANDLE;
2581         }
2582
2583         return h;
2584 }
2585
2586 /* ha->hardware_lock supposed to be held on entry */
2587 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2588         struct qla_tgt_prm *prm)
2589 {
2590         uint32_t h;
2591         struct ctio7_to_24xx *pkt;
2592         struct atio_from_isp *atio = &prm->cmd->atio;
2593         uint16_t temp;
2594
2595         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2596         prm->pkt = pkt;
2597         memset(pkt, 0, sizeof(*pkt));
2598
2599         pkt->entry_type = CTIO_TYPE7;
2600         pkt->entry_count = (uint8_t)prm->req_cnt;
2601         pkt->vp_index = prm->cmd->vp_idx;
2602
2603         h = qlt_make_handle(qpair);
2604         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2605                 /*
2606                  * CTIO type 7 from the firmware doesn't provide a way to
2607                  * know the initiator's LOOP ID, hence we can't find
2608                  * the session and, so, the command.
2609                  */
2610                 return -EAGAIN;
2611         } else
2612                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2613
2614         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2615         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2616         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2617         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2618         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2619         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2620         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2621         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2622         temp = atio->u.isp24.attr << 9;
2623         pkt->u.status0.flags |= cpu_to_le16(temp);
2624         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2625         pkt->u.status0.ox_id = cpu_to_le16(temp);
2626         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2627
2628         return 0;
2629 }
2630
2631 /*
2632  * ha->hardware_lock supposed to be held on entry. We have already made sure
2633  * that there is sufficient amount of request entries to not drop it.
2634  */
2635 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2636 {
2637         int cnt;
2638         uint32_t *dword_ptr;
2639
2640         /* Build continuation packets */
2641         while (prm->seg_cnt > 0) {
2642                 cont_a64_entry_t *cont_pkt64 =
2643                         (cont_a64_entry_t *)qlt_get_req_pkt(
2644                            prm->cmd->qpair->req);
2645
2646                 /*
2647                  * Make sure that from cont_pkt64 none of
2648                  * 64-bit specific fields used for 32-bit
2649                  * addressing. Cast to (cont_entry_t *) for
2650                  * that.
2651                  */
2652
2653                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2654
2655                 cont_pkt64->entry_count = 1;
2656                 cont_pkt64->sys_define = 0;
2657
2658                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2659                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2660
2661                 /* Load continuation entry data segments */
2662                 for (cnt = 0;
2663                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2664                     cnt++, prm->seg_cnt--) {
2665                         *dword_ptr++ =
2666                             cpu_to_le32(lower_32_bits
2667                                 (sg_dma_address(prm->sg)));
2668                         *dword_ptr++ = cpu_to_le32(upper_32_bits
2669                             (sg_dma_address(prm->sg)));
2670                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2671
2672                         prm->sg = sg_next(prm->sg);
2673                 }
2674         }
2675 }
2676
2677 /*
2678  * ha->hardware_lock supposed to be held on entry. We have already made sure
2679  * that there is sufficient amount of request entries to not drop it.
2680  */
2681 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2682 {
2683         int cnt;
2684         uint32_t *dword_ptr;
2685         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2686
2687         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2688
2689         /* Setup packet address segment pointer */
2690         dword_ptr = pkt24->u.status0.dseg_0_address;
2691
2692         /* Set total data segment count */
2693         if (prm->seg_cnt)
2694                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2695
2696         if (prm->seg_cnt == 0) {
2697                 /* No data transfer */
2698                 *dword_ptr++ = 0;
2699                 *dword_ptr = 0;
2700                 return;
2701         }
2702
2703         /* If scatter gather */
2704
2705         /* Load command entry data segments */
2706         for (cnt = 0;
2707             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2708             cnt++, prm->seg_cnt--) {
2709                 *dword_ptr++ =
2710                     cpu_to_le32(lower_32_bits(sg_dma_address(prm->sg)));
2711
2712                 *dword_ptr++ = cpu_to_le32(upper_32_bits(
2713                         sg_dma_address(prm->sg)));
2714
2715                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2716
2717                 prm->sg = sg_next(prm->sg);
2718         }
2719
2720         qlt_load_cont_data_segments(prm);
2721 }
2722
2723 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2724 {
2725         return cmd->bufflen > 0;
2726 }
2727
2728 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2729 {
2730         struct qla_tgt_cmd *cmd;
2731         struct scsi_qla_host *vha;
2732
2733         /* asc 0x10=dif error */
2734         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2735                 cmd = prm->cmd;
2736                 vha = cmd->vha;
2737                 /* ASCQ */
2738                 switch (prm->sense_buffer[13]) {
2739                 case 1:
2740                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2741                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2742                             "se_cmd=%p tag[%x]",
2743                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2744                             cmd->atio.u.isp24.exchange_addr);
2745                         break;
2746                 case 2:
2747                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2748                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2749                             "se_cmd=%p tag[%x]",
2750                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2751                             cmd->atio.u.isp24.exchange_addr);
2752                         break;
2753                 case 3:
2754                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2755                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2756                             "se_cmd=%p tag[%x]",
2757                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2758                             cmd->atio.u.isp24.exchange_addr);
2759                         break;
2760                 default:
2761                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2762                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2763                             "se_cmd=%p tag[%x]",
2764                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2765                             cmd->atio.u.isp24.exchange_addr);
2766                         break;
2767                 }
2768                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2769         }
2770 }
2771
2772 /*
2773  * Called without ha->hardware_lock held
2774  */
2775 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2776         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2777         uint32_t *full_req_cnt)
2778 {
2779         struct se_cmd *se_cmd = &cmd->se_cmd;
2780         struct qla_qpair *qpair = cmd->qpair;
2781
2782         prm->cmd = cmd;
2783         prm->tgt = cmd->tgt;
2784         prm->pkt = NULL;
2785         prm->rq_result = scsi_status;
2786         prm->sense_buffer = &cmd->sense_buffer[0];
2787         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2788         prm->sg = NULL;
2789         prm->seg_cnt = -1;
2790         prm->req_cnt = 1;
2791         prm->residual = 0;
2792         prm->add_status_pkt = 0;
2793         prm->prot_sg = NULL;
2794         prm->prot_seg_cnt = 0;
2795         prm->tot_dsds = 0;
2796
2797         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2798                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2799                         return -EAGAIN;
2800         }
2801
2802         *full_req_cnt = prm->req_cnt;
2803
2804         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2805                 prm->residual = se_cmd->residual_count;
2806                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2807                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2808                        prm->residual, se_cmd->tag,
2809                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2810                        cmd->bufflen, prm->rq_result);
2811                 prm->rq_result |= SS_RESIDUAL_UNDER;
2812         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2813                 prm->residual = se_cmd->residual_count;
2814                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2815                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2816                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2817                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2818                 prm->rq_result |= SS_RESIDUAL_OVER;
2819         }
2820
2821         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2822                 /*
2823                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2824                  * ignored in *xmit_response() below
2825                  */
2826                 if (qlt_has_data(cmd)) {
2827                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2828                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2829                             (prm->rq_result != 0))) {
2830                                 prm->add_status_pkt = 1;
2831                                 (*full_req_cnt)++;
2832                         }
2833                 }
2834         }
2835
2836         return 0;
2837 }
2838
2839 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2840     int sending_sense)
2841 {
2842         if (cmd->qpair->enable_class_2)
2843                 return 0;
2844
2845         if (sending_sense)
2846                 return cmd->conf_compl_supported;
2847         else
2848                 return cmd->qpair->enable_explicit_conf &&
2849                     cmd->conf_compl_supported;
2850 }
2851
2852 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2853         struct qla_tgt_prm *prm)
2854 {
2855         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2856             (uint32_t)sizeof(ctio->u.status1.sense_data));
2857         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2858         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2859                 ctio->u.status0.flags |= cpu_to_le16(
2860                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2861                     CTIO7_FLAGS_CONFORM_REQ);
2862         }
2863         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2864         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2865         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2866                 int i;
2867
2868                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2869                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2870                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2871                                     "Skipping EXPLICIT_CONFORM and "
2872                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2873                                     "non GOOD status\n");
2874                                 goto skip_explict_conf;
2875                         }
2876                         ctio->u.status1.flags |= cpu_to_le16(
2877                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2878                             CTIO7_FLAGS_CONFORM_REQ);
2879                 }
2880 skip_explict_conf:
2881                 ctio->u.status1.flags &=
2882                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2883                 ctio->u.status1.flags |=
2884                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2885                 ctio->u.status1.scsi_status |=
2886                     cpu_to_le16(SS_SENSE_LEN_VALID);
2887                 ctio->u.status1.sense_length =
2888                     cpu_to_le16(prm->sense_buffer_len);
2889                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2890                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2891                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2892
2893                 qlt_print_dif_err(prm);
2894
2895         } else {
2896                 ctio->u.status1.flags &=
2897                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2898                 ctio->u.status1.flags |=
2899                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2900                 ctio->u.status1.sense_length = 0;
2901                 memset(ctio->u.status1.sense_data, 0,
2902                     sizeof(ctio->u.status1.sense_data));
2903         }
2904
2905         /* Sense with len > 24, is it possible ??? */
2906 }
2907
2908 static inline int
2909 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2910 {
2911         switch (se_cmd->prot_op) {
2912         case TARGET_PROT_DOUT_INSERT:
2913         case TARGET_PROT_DIN_STRIP:
2914                 if (ql2xenablehba_err_chk >= 1)
2915                         return 1;
2916                 break;
2917         case TARGET_PROT_DOUT_PASS:
2918         case TARGET_PROT_DIN_PASS:
2919                 if (ql2xenablehba_err_chk >= 2)
2920                         return 1;
2921                 break;
2922         case TARGET_PROT_DIN_INSERT:
2923         case TARGET_PROT_DOUT_STRIP:
2924                 return 1;
2925         default:
2926                 break;
2927         }
2928         return 0;
2929 }
2930
2931 static inline int
2932 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2933 {
2934         switch (se_cmd->prot_op) {
2935         case TARGET_PROT_DIN_INSERT:
2936         case TARGET_PROT_DOUT_INSERT:
2937         case TARGET_PROT_DIN_STRIP:
2938         case TARGET_PROT_DOUT_STRIP:
2939         case TARGET_PROT_DIN_PASS:
2940         case TARGET_PROT_DOUT_PASS:
2941             return 1;
2942         default:
2943             return 0;
2944         }
2945         return 0;
2946 }
2947
2948 /*
2949  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2950  */
2951 static void
2952 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2953     uint16_t *pfw_prot_opts)
2954 {
2955         struct se_cmd *se_cmd = &cmd->se_cmd;
2956         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2957         scsi_qla_host_t *vha = cmd->tgt->vha;
2958         struct qla_hw_data *ha = vha->hw;
2959         uint32_t t32 = 0;
2960
2961         /*
2962          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2963          * have been immplemented by TCM, before AppTag is avail.
2964          * Look for modesense_handlers[]
2965          */
2966         ctx->app_tag = 0;
2967         ctx->app_tag_mask[0] = 0x0;
2968         ctx->app_tag_mask[1] = 0x0;
2969
2970         if (IS_PI_UNINIT_CAPABLE(ha)) {
2971                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2972                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2973                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2974                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2975                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2976         }
2977
2978         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2979
2980         switch (se_cmd->prot_type) {
2981         case TARGET_DIF_TYPE0_PROT:
2982                 /*
2983                  * No check for ql2xenablehba_err_chk, as it
2984                  * would be an I/O error if hba tag generation
2985                  * is not done.
2986                  */
2987                 ctx->ref_tag = cpu_to_le32(lba);
2988                 /* enable ALL bytes of the ref tag */
2989                 ctx->ref_tag_mask[0] = 0xff;
2990                 ctx->ref_tag_mask[1] = 0xff;
2991                 ctx->ref_tag_mask[2] = 0xff;
2992                 ctx->ref_tag_mask[3] = 0xff;
2993                 break;
2994         case TARGET_DIF_TYPE1_PROT:
2995             /*
2996              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2997              * REF tag, and 16 bit app tag.
2998              */
2999             ctx->ref_tag = cpu_to_le32(lba);
3000             if (!qla_tgt_ref_mask_check(se_cmd) ||
3001                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3002                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3003                     break;
3004             }
3005             /* enable ALL bytes of the ref tag */
3006             ctx->ref_tag_mask[0] = 0xff;
3007             ctx->ref_tag_mask[1] = 0xff;
3008             ctx->ref_tag_mask[2] = 0xff;
3009             ctx->ref_tag_mask[3] = 0xff;
3010             break;
3011         case TARGET_DIF_TYPE2_PROT:
3012             /*
3013              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3014              * tag has to match LBA in CDB + N
3015              */
3016             ctx->ref_tag = cpu_to_le32(lba);
3017             if (!qla_tgt_ref_mask_check(se_cmd) ||
3018                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3019                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3020                     break;
3021             }
3022             /* enable ALL bytes of the ref tag */
3023             ctx->ref_tag_mask[0] = 0xff;
3024             ctx->ref_tag_mask[1] = 0xff;
3025             ctx->ref_tag_mask[2] = 0xff;
3026             ctx->ref_tag_mask[3] = 0xff;
3027             break;
3028         case TARGET_DIF_TYPE3_PROT:
3029             /* For TYPE 3 protection: 16 bit GUARD only */
3030             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3031             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3032                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3033             break;
3034         }
3035 }
3036
3037 static inline int
3038 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3039 {
3040         uint32_t                *cur_dsd;
3041         uint32_t                transfer_length = 0;
3042         uint32_t                data_bytes;
3043         uint32_t                dif_bytes;
3044         uint8_t                 bundling = 1;
3045         struct crc_context      *crc_ctx_pkt = NULL;
3046         struct qla_hw_data      *ha;
3047         struct ctio_crc2_to_fw  *pkt;
3048         dma_addr_t              crc_ctx_dma;
3049         uint16_t                fw_prot_opts = 0;
3050         struct qla_tgt_cmd      *cmd = prm->cmd;
3051         struct se_cmd           *se_cmd = &cmd->se_cmd;
3052         uint32_t h;
3053         struct atio_from_isp *atio = &prm->cmd->atio;
3054         struct qla_tc_param     tc;
3055         uint16_t t16;
3056         scsi_qla_host_t *vha = cmd->vha;
3057
3058         ha = vha->hw;
3059
3060         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3061         prm->pkt = pkt;
3062         memset(pkt, 0, sizeof(*pkt));
3063
3064         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3065                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3066                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3067                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3068
3069         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3070             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3071                 bundling = 0;
3072
3073         /* Compute dif len and adjust data len to incude protection */
3074         data_bytes = cmd->bufflen;
3075         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3076
3077         switch (se_cmd->prot_op) {
3078         case TARGET_PROT_DIN_INSERT:
3079         case TARGET_PROT_DOUT_STRIP:
3080                 transfer_length = data_bytes;
3081                 if (cmd->prot_sg_cnt)
3082                         data_bytes += dif_bytes;
3083                 break;
3084         case TARGET_PROT_DIN_STRIP:
3085         case TARGET_PROT_DOUT_INSERT:
3086         case TARGET_PROT_DIN_PASS:
3087         case TARGET_PROT_DOUT_PASS:
3088                 transfer_length = data_bytes + dif_bytes;
3089                 break;
3090         default:
3091                 BUG();
3092                 break;
3093         }
3094
3095         if (!qlt_hba_err_chk_enabled(se_cmd))
3096                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3097         /* HBA error checking enabled */
3098         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3099                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3100                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3101                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3102                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3103                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3104         }
3105
3106         switch (se_cmd->prot_op) {
3107         case TARGET_PROT_DIN_INSERT:
3108         case TARGET_PROT_DOUT_INSERT:
3109                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3110                 break;
3111         case TARGET_PROT_DIN_STRIP:
3112         case TARGET_PROT_DOUT_STRIP:
3113                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3114                 break;
3115         case TARGET_PROT_DIN_PASS:
3116         case TARGET_PROT_DOUT_PASS:
3117                 fw_prot_opts |= PO_MODE_DIF_PASS;
3118                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3119                 break;
3120         default:/* Normal Request */
3121                 fw_prot_opts |= PO_MODE_DIF_PASS;
3122                 break;
3123         }
3124
3125         /* ---- PKT ---- */
3126         /* Update entry type to indicate Command Type CRC_2 IOCB */
3127         pkt->entry_type  = CTIO_CRC2;
3128         pkt->entry_count = 1;
3129         pkt->vp_index = cmd->vp_idx;
3130
3131         h = qlt_make_handle(qpair);
3132         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3133                 /*
3134                  * CTIO type 7 from the firmware doesn't provide a way to
3135                  * know the initiator's LOOP ID, hence we can't find
3136                  * the session and, so, the command.
3137                  */
3138                 return -EAGAIN;
3139         } else
3140                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3141
3142         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3143         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3144         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3145         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3146         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3147         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3148         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3149         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3150
3151         /* silence compile warning */
3152         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3153         pkt->ox_id  = cpu_to_le16(t16);
3154
3155         t16 = (atio->u.isp24.attr << 9);
3156         pkt->flags |= cpu_to_le16(t16);
3157         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3158
3159         /* Set transfer direction */
3160         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3161                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3162         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3163                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3164
3165         pkt->dseg_count = prm->tot_dsds;
3166         /* Fibre channel byte count */
3167         pkt->transfer_length = cpu_to_le32(transfer_length);
3168
3169         /* ----- CRC context -------- */
3170
3171         /* Allocate CRC context from global pool */
3172         crc_ctx_pkt = cmd->ctx =
3173             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3174
3175         if (!crc_ctx_pkt)
3176                 goto crc_queuing_error;
3177
3178         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3179         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3180
3181         /* Set handle */
3182         crc_ctx_pkt->handle = pkt->handle;
3183
3184         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3185
3186         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3187         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3188         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3189
3190         if (!bundling) {
3191                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3192         } else {
3193                 /*
3194                  * Configure Bundling if we need to fetch interlaving
3195                  * protection PCI accesses
3196                  */
3197                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3198                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3199                 crc_ctx_pkt->u.bundling.dseg_count =
3200                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3201                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3202         }
3203
3204         /* Finish the common fields of CRC pkt */
3205         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3206         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3207         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3208         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3209
3210         memset((uint8_t *)&tc, 0 , sizeof(tc));
3211         tc.vha = vha;
3212         tc.blk_sz = cmd->blk_sz;
3213         tc.bufflen = cmd->bufflen;
3214         tc.sg = cmd->sg;
3215         tc.prot_sg = cmd->prot_sg;
3216         tc.ctx = crc_ctx_pkt;
3217         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3218
3219         /* Walks data segments */
3220         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3221
3222         if (!bundling && prm->prot_seg_cnt) {
3223                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3224                         prm->tot_dsds, &tc))
3225                         goto crc_queuing_error;
3226         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3227                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3228                 goto crc_queuing_error;
3229
3230         if (bundling && prm->prot_seg_cnt) {
3231                 /* Walks dif segments */
3232                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3233
3234                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3235                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3236                         prm->prot_seg_cnt, cmd))
3237                         goto crc_queuing_error;
3238         }
3239         return QLA_SUCCESS;
3240
3241 crc_queuing_error:
3242         /* Cleanup will be performed by the caller */
3243         qpair->req->outstanding_cmds[h] = NULL;
3244
3245         return QLA_FUNCTION_FAILED;
3246 }
3247
3248 /*
3249  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3250  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3251  */
3252 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3253         uint8_t scsi_status)
3254 {
3255         struct scsi_qla_host *vha = cmd->vha;
3256         struct qla_qpair *qpair = cmd->qpair;
3257         struct ctio7_to_24xx *pkt;
3258         struct qla_tgt_prm prm;
3259         uint32_t full_req_cnt = 0;
3260         unsigned long flags = 0;
3261         int res;
3262
3263         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3264             (cmd->sess && cmd->sess->deleted)) {
3265                 cmd->state = QLA_TGT_STATE_PROCESSED;
3266                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3267                 return 0;
3268         }
3269
3270         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3271             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3272             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3273             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3274             &cmd->se_cmd, qpair->id);
3275
3276         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3277             &full_req_cnt);
3278         if (unlikely(res != 0)) {
3279                 return res;
3280         }
3281
3282         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3283
3284         if (xmit_type == QLA_TGT_XMIT_STATUS)
3285                 qpair->tgt_counters.core_qla_snd_status++;
3286         else
3287                 qpair->tgt_counters.core_qla_que_buf++;
3288
3289         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3290                 /*
3291                  * Either the port is not online or this request was from
3292                  * previous life, just abort the processing.
3293                  */
3294                 cmd->state = QLA_TGT_STATE_PROCESSED;
3295                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3296                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3297                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3298                         vha->flags.online, qla2x00_reset_active(vha),
3299                         cmd->reset_count, qpair->chip_reset);
3300                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3301                 return 0;
3302         }
3303
3304         /* Does F/W have an IOCBs for this request */
3305         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3306         if (unlikely(res))
3307                 goto out_unmap_unlock;
3308
3309         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3310                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3311         else
3312                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3313         if (unlikely(res != 0)) {
3314                 qpair->req->cnt += full_req_cnt;
3315                 goto out_unmap_unlock;
3316         }
3317
3318         pkt = (struct ctio7_to_24xx *)prm.pkt;
3319
3320         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3321                 pkt->u.status0.flags |=
3322                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3323                         CTIO7_FLAGS_STATUS_MODE_0);
3324
3325                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3326                         qlt_load_data_segments(&prm);
3327
3328                 if (prm.add_status_pkt == 0) {
3329                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3330                                 pkt->u.status0.scsi_status =
3331                                     cpu_to_le16(prm.rq_result);
3332                                 pkt->u.status0.residual =
3333                                     cpu_to_le32(prm.residual);
3334                                 pkt->u.status0.flags |= cpu_to_le16(
3335                                     CTIO7_FLAGS_SEND_STATUS);
3336                                 if (qlt_need_explicit_conf(cmd, 0)) {
3337                                         pkt->u.status0.flags |=
3338                                             cpu_to_le16(
3339                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3340                                                 CTIO7_FLAGS_CONFORM_REQ);
3341                                 }
3342                         }
3343
3344                 } else {
3345                         /*
3346                          * We have already made sure that there is sufficient
3347                          * amount of request entries to not drop HW lock in
3348                          * req_pkt().
3349                          */
3350                         struct ctio7_to_24xx *ctio =
3351                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3352                                     qpair->req);
3353
3354                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3355                             "Building additional status packet 0x%p.\n",
3356                             ctio);
3357
3358                         /*
3359                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3360                          * ctio7_to_24xx
3361                          */
3362                         memcpy(ctio, pkt, sizeof(*ctio));
3363                         /* reset back to CTIO7 */
3364                         ctio->entry_count = 1;
3365                         ctio->entry_type = CTIO_TYPE7;
3366                         ctio->dseg_count = 0;
3367                         ctio->u.status1.flags &= ~cpu_to_le16(
3368                             CTIO7_FLAGS_DATA_IN);
3369
3370                         /* Real finish is ctio_m1's finish */
3371                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3372                         pkt->u.status0.flags |= cpu_to_le16(
3373                             CTIO7_FLAGS_DONT_RET_CTIO);
3374
3375                         /* qlt_24xx_init_ctio_to_isp will correct
3376                          * all neccessary fields that's part of CTIO7.
3377                          * There should be no residual of CTIO-CRC2 data.
3378                          */
3379                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3380                             &prm);
3381                 }
3382         } else
3383                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3384
3385
3386         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3387         spin_lock(&cmd->cmd_lock);
3388         cmd->cmd_sent_to_fw = 1;
3389         spin_unlock(&cmd->cmd_lock);
3390         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3391
3392         /* Memory Barrier */
3393         wmb();
3394         if (qpair->reqq_start_iocbs)
3395                 qpair->reqq_start_iocbs(qpair);
3396         else
3397                 qla2x00_start_iocbs(vha, qpair->req);
3398         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3399
3400         return 0;
3401
3402 out_unmap_unlock:
3403         qlt_unmap_sg(vha, cmd);
3404         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3405
3406         return res;
3407 }
3408 EXPORT_SYMBOL(qlt_xmit_response);
3409
3410 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3411 {
3412         struct ctio7_to_24xx *pkt;
3413         struct scsi_qla_host *vha = cmd->vha;
3414         struct qla_tgt *tgt = cmd->tgt;
3415         struct qla_tgt_prm prm;
3416         unsigned long flags = 0;
3417         int res = 0;
3418         struct qla_qpair *qpair = cmd->qpair;
3419
3420         memset(&prm, 0, sizeof(prm));
3421         prm.cmd = cmd;
3422         prm.tgt = tgt;
3423         prm.sg = NULL;
3424         prm.req_cnt = 1;
3425
3426         /* Calculate number of entries and segments required */
3427         if (qlt_pci_map_calc_cnt(&prm) != 0)
3428                 return -EAGAIN;
3429
3430         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3431             (cmd->sess && cmd->sess->deleted)) {
3432                 /*
3433                  * Either the port is not online or this request was from
3434                  * previous life, just abort the processing.
3435                  */
3436                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3437                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3438                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3439                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3440                         vha->flags.online, qla2x00_reset_active(vha),
3441                         cmd->reset_count, qpair->chip_reset);
3442                 return 0;
3443         }
3444
3445         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3446         /* Does F/W have an IOCBs for this request */
3447         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3448         if (res != 0)
3449                 goto out_unlock_free_unmap;
3450         if (cmd->se_cmd.prot_op)
3451                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3452         else
3453                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3454
3455         if (unlikely(res != 0)) {
3456                 qpair->req->cnt += prm.req_cnt;
3457                 goto out_unlock_free_unmap;
3458         }
3459
3460         pkt = (struct ctio7_to_24xx *)prm.pkt;
3461         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3462             CTIO7_FLAGS_STATUS_MODE_0);
3463
3464         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3465                 qlt_load_data_segments(&prm);
3466
3467         cmd->state = QLA_TGT_STATE_NEED_DATA;
3468         spin_lock(&cmd->cmd_lock);
3469         cmd->cmd_sent_to_fw = 1;
3470         spin_unlock(&cmd->cmd_lock);
3471         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3472
3473         /* Memory Barrier */
3474         wmb();
3475         if (qpair->reqq_start_iocbs)
3476                 qpair->reqq_start_iocbs(qpair);
3477         else
3478                 qla2x00_start_iocbs(vha, qpair->req);
3479         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3480
3481         return res;
3482
3483 out_unlock_free_unmap:
3484         qlt_unmap_sg(vha, cmd);
3485         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3486
3487         return res;
3488 }
3489 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3490
3491
3492 /*
3493  * it is assumed either hardware_lock or qpair lock is held.
3494  */
3495 static void
3496 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3497         struct ctio_crc_from_fw *sts)
3498 {
3499         uint8_t         *ap = &sts->actual_dif[0];
3500         uint8_t         *ep = &sts->expected_dif[0];
3501         uint64_t        lba = cmd->se_cmd.t_task_lba;
3502         uint8_t scsi_status, sense_key, asc, ascq;
3503         unsigned long flags;
3504         struct scsi_qla_host *vha = cmd->vha;
3505
3506         cmd->trc_flags |= TRC_DIF_ERR;
3507
3508         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3509         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3510         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3511
3512         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3513         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3514         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3515
3516         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3517             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3518
3519         scsi_status = sense_key = asc = ascq = 0;
3520
3521         /* check appl tag */
3522         if (cmd->e_app_tag != cmd->a_app_tag) {
3523                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3524                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3525                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3526                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3527                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3528                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3529
3530                 cmd->dif_err_code = DIF_ERR_APP;
3531                 scsi_status = SAM_STAT_CHECK_CONDITION;
3532                 sense_key = ABORTED_COMMAND;
3533                 asc = 0x10;
3534                 ascq = 0x2;
3535         }
3536
3537         /* check ref tag */
3538         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3539                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3540                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3541                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3542                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3543                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3544                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3545
3546                 cmd->dif_err_code = DIF_ERR_REF;
3547                 scsi_status = SAM_STAT_CHECK_CONDITION;
3548                 sense_key = ABORTED_COMMAND;
3549                 asc = 0x10;
3550                 ascq = 0x3;
3551                 goto out;
3552         }
3553
3554         /* check guard */
3555         if (cmd->e_guard != cmd->a_guard) {
3556                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3557                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3558                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3559                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3560                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3561                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3562
3563                 cmd->dif_err_code = DIF_ERR_GRD;
3564                 scsi_status = SAM_STAT_CHECK_CONDITION;
3565                 sense_key = ABORTED_COMMAND;
3566                 asc = 0x10;
3567                 ascq = 0x1;
3568         }
3569 out:
3570         switch (cmd->state) {
3571         case QLA_TGT_STATE_NEED_DATA:
3572                 /* handle_data will load DIF error code  */
3573                 cmd->state = QLA_TGT_STATE_DATA_IN;
3574                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3575                 break;
3576         default:
3577                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3578                 if (cmd->aborted) {
3579                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3580                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3581                         break;
3582                 }
3583                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3584
3585                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3586                     ascq);
3587                 /* assume scsi status gets out on the wire.
3588                  * Will not wait for completion.
3589                  */
3590                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3591                 break;
3592         }
3593 }
3594
3595 /* If hardware_lock held on entry, might drop it, then reaquire */
3596 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3597 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3598         struct imm_ntfy_from_isp *ntfy)
3599 {
3600         struct nack_to_isp *nack;
3601         struct qla_hw_data *ha = vha->hw;
3602         request_t *pkt;
3603         int ret = 0;
3604
3605         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3606             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3607
3608         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3609         if (pkt == NULL) {
3610                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3611                     "qla_target(%d): %s failed: unable to allocate "
3612                     "request packet\n", vha->vp_idx, __func__);
3613                 return -ENOMEM;
3614         }
3615
3616         pkt->entry_type = NOTIFY_ACK_TYPE;
3617         pkt->entry_count = 1;
3618         pkt->handle = QLA_TGT_SKIP_HANDLE;
3619
3620         nack = (struct nack_to_isp *)pkt;
3621         nack->ox_id = ntfy->ox_id;
3622
3623         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3624         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3625                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3626                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3627         }
3628
3629         /* terminate */
3630         nack->u.isp24.flags |=
3631                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3632
3633         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3634         nack->u.isp24.status = ntfy->u.isp24.status;
3635         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3636         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3637         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3638         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3639         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3640         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3641
3642         qla2x00_start_iocbs(vha, vha->req);
3643         return ret;
3644 }
3645
3646 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3647         struct imm_ntfy_from_isp *imm, int ha_locked)
3648 {
3649         unsigned long flags = 0;
3650         int rc;
3651
3652         if (ha_locked) {
3653                 rc = __qlt_send_term_imm_notif(vha, imm);
3654
3655 #if 0   /* Todo  */
3656                 if (rc == -ENOMEM)
3657                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3658 #else
3659                 if (rc) {
3660                 }
3661 #endif
3662                 goto done;
3663         }
3664
3665         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3666         rc = __qlt_send_term_imm_notif(vha, imm);
3667
3668 #if 0   /* Todo */
3669         if (rc == -ENOMEM)
3670                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3671 #endif
3672
3673 done:
3674         if (!ha_locked)
3675                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3676 }
3677
3678 /*
3679  * If hardware_lock held on entry, might drop it, then reaquire
3680  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3681  */
3682 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3683         struct qla_tgt_cmd *cmd,
3684         struct atio_from_isp *atio)
3685 {
3686         struct scsi_qla_host *vha = qpair->vha;
3687         struct ctio7_to_24xx *ctio24;
3688         struct qla_hw_data *ha = vha->hw;
3689         request_t *pkt;
3690         int ret = 0;
3691         uint16_t temp;
3692
3693         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3694
3695         if (cmd)
3696                 vha = cmd->vha;
3697
3698         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3699         if (pkt == NULL) {
3700                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3701                     "qla_target(%d): %s failed: unable to allocate "
3702                     "request packet\n", vha->vp_idx, __func__);
3703                 return -ENOMEM;
3704         }
3705
3706         if (cmd != NULL) {
3707                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3708                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3709                             "qla_target(%d): Terminating cmd %p with "
3710                             "incorrect state %d\n", vha->vp_idx, cmd,
3711                             cmd->state);
3712                 } else
3713                         ret = 1;
3714         }
3715
3716         qpair->tgt_counters.num_term_xchg_sent++;
3717         pkt->entry_count = 1;
3718         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3719
3720         ctio24 = (struct ctio7_to_24xx *)pkt;
3721         ctio24->entry_type = CTIO_TYPE7;
3722         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3723         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3724         ctio24->vp_index = vha->vp_idx;
3725         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3726         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3727         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3728         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3729         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3730                 CTIO7_FLAGS_TERMINATE;
3731         ctio24->u.status1.flags = cpu_to_le16(temp);
3732         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3733         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3734
3735         /* Memory Barrier */
3736         wmb();
3737         if (qpair->reqq_start_iocbs)
3738                 qpair->reqq_start_iocbs(qpair);
3739         else
3740                 qla2x00_start_iocbs(vha, qpair->req);
3741         return ret;
3742 }
3743
3744 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3745         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3746         int ul_abort)
3747 {
3748         struct scsi_qla_host *vha;
3749         unsigned long flags = 0;
3750         int rc;
3751
3752         /* why use different vha? NPIV */
3753         if (cmd)
3754                 vha = cmd->vha;
3755         else
3756                 vha = qpair->vha;
3757
3758         if (ha_locked) {
3759                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3760                 if (rc == -ENOMEM)
3761                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3762                 goto done;
3763         }
3764         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3765         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3766         if (rc == -ENOMEM)
3767                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3768
3769 done:
3770         if (cmd && !ul_abort && !cmd->aborted) {
3771                 if (cmd->sg_mapped)
3772                         qlt_unmap_sg(vha, cmd);
3773                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3774         }
3775
3776         if (!ha_locked)
3777                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3778
3779         return;
3780 }
3781
3782 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3783 {
3784         struct list_head free_list;
3785         struct qla_tgt_cmd *cmd, *tcmd;
3786
3787         vha->hw->tgt.leak_exchg_thresh_hold =
3788             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3789
3790         cmd = tcmd = NULL;
3791         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3792                 INIT_LIST_HEAD(&free_list);
3793                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3794
3795                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3796                         list_del(&cmd->cmd_list);
3797                         /* This cmd was never sent to TCM.  There is no need
3798                          * to schedule free or call free_cmd
3799                          */
3800                         qlt_free_cmd(cmd);
3801                         vha->hw->tgt.num_qfull_cmds_alloc--;
3802                 }
3803         }
3804         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3805 }
3806
3807 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3808 {
3809         uint32_t total_leaked;
3810
3811         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3812
3813         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3814             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3815
3816                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3817                     "Chip reset due to exchange starvation: %d/%d.\n",
3818                     total_leaked, vha->hw->cur_fw_xcb_count);
3819
3820                 if (IS_P3P_TYPE(vha->hw))
3821                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3822                 else
3823                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3824                 qla2xxx_wake_dpc(vha);
3825         }
3826
3827 }
3828
3829 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3830 {
3831         struct qla_tgt *tgt = cmd->tgt;
3832         struct scsi_qla_host *vha = tgt->vha;
3833         struct se_cmd *se_cmd = &cmd->se_cmd;
3834         unsigned long flags;
3835
3836         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3837             "qla_target(%d): terminating exchange for aborted cmd=%p "
3838             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3839             se_cmd->tag);
3840
3841         spin_lock_irqsave(&cmd->cmd_lock, flags);
3842         if (cmd->aborted) {
3843                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3844                 /*
3845                  * It's normal to see 2 calls in this path:
3846                  *  1) XFER Rdy completion + CMD_T_ABORT
3847                  *  2) TCM TMR - drain_state_list
3848                  */
3849                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3850                     "multiple abort. %p transport_state %x, t_state %x, "
3851                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3852                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3853                 return EIO;
3854         }
3855         cmd->aborted = 1;
3856         cmd->trc_flags |= TRC_ABORT;
3857         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3858
3859         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3860         return 0;
3861 }
3862 EXPORT_SYMBOL(qlt_abort_cmd);
3863
3864 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3865 {
3866         struct fc_port *sess = cmd->sess;
3867
3868         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3869             "%s: se_cmd[%p] ox_id %04x\n",
3870             __func__, &cmd->se_cmd,
3871             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3872
3873         BUG_ON(cmd->cmd_in_wq);
3874
3875         if (cmd->sg_mapped)
3876                 qlt_unmap_sg(cmd->vha, cmd);
3877
3878         if (!cmd->q_full)
3879                 qlt_decr_num_pend_cmds(cmd->vha);
3880
3881         BUG_ON(cmd->sg_mapped);
3882         cmd->jiffies_at_free = get_jiffies_64();
3883         if (unlikely(cmd->free_sg))
3884                 kfree(cmd->sg);
3885
3886         if (!sess || !sess->se_sess) {
3887                 WARN_ON(1);
3888                 return;
3889         }
3890         cmd->jiffies_at_free = get_jiffies_64();
3891         target_free_tag(sess->se_sess, &cmd->se_cmd);
3892 }
3893 EXPORT_SYMBOL(qlt_free_cmd);
3894
3895 /*
3896  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3897  */
3898 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3899         struct qla_tgt_cmd *cmd, uint32_t status)
3900 {
3901         int term = 0;
3902         struct scsi_qla_host *vha = qpair->vha;
3903
3904         if (cmd->se_cmd.prot_op)
3905                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3906                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3907                     "se_cmd=%p tag[%x] op %#x/%s",
3908                      cmd->lba, cmd->lba,
3909                      cmd->num_blks, &cmd->se_cmd,
3910                      cmd->atio.u.isp24.exchange_addr,
3911                      cmd->se_cmd.prot_op,
3912                      prot_op_str(cmd->se_cmd.prot_op));
3913
3914         if (ctio != NULL) {
3915                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3916                 term = !(c->flags &
3917                     cpu_to_le16(OF_TERM_EXCH));
3918         } else
3919                 term = 1;
3920
3921         if (term)
3922                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3923
3924         return term;
3925 }
3926
3927
3928 /* ha->hardware_lock supposed to be held on entry */
3929 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3930         struct rsp_que *rsp, uint32_t handle, void *ctio)
3931 {
3932         void *cmd = NULL;
3933         struct req_que *req;
3934         int qid = GET_QID(handle);
3935         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3936
3937         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3938                 return NULL;
3939
3940         if (qid == rsp->req->id) {
3941                 req = rsp->req;
3942         } else if (vha->hw->req_q_map[qid]) {
3943                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3944                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3945                     vha->vp_idx, rsp->id, handle);
3946                 req = vha->hw->req_q_map[qid];
3947         } else {
3948                 return NULL;
3949         }
3950
3951         h &= QLA_CMD_HANDLE_MASK;
3952
3953         if (h != QLA_TGT_NULL_HANDLE) {
3954                 if (unlikely(h >= req->num_outstanding_cmds)) {
3955                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3956                             "qla_target(%d): Wrong handle %x received\n",
3957                             vha->vp_idx, handle);
3958                         return NULL;
3959                 }
3960
3961                 cmd = (void *) req->outstanding_cmds[h];
3962                 if (unlikely(cmd == NULL)) {
3963                         ql_dbg(ql_dbg_async, vha, 0xe053,
3964                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3965                                 vha->vp_idx, handle, req->id, rsp->id);
3966                         return NULL;
3967                 }
3968                 req->outstanding_cmds[h] = NULL;
3969         } else if (ctio != NULL) {
3970                 /* We can't get loop ID from CTIO7 */
3971                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3972                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3973                     "support NULL handles\n", vha->vp_idx);
3974                 return NULL;
3975         }
3976
3977         return cmd;
3978 }
3979
3980 /* hardware_lock should be held by caller. */
3981 void
3982 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3983 {
3984         struct qla_hw_data *ha = vha->hw;
3985
3986         if (cmd->sg_mapped)
3987                 qlt_unmap_sg(vha, cmd);
3988
3989         /* TODO: fix debug message type and ids. */
3990         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3991                 ql_dbg(ql_dbg_io, vha, 0xff00,
3992                     "HOST-ABORT: state=PROCESSED.\n");
3993         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3994                 cmd->write_data_transferred = 0;
3995                 cmd->state = QLA_TGT_STATE_DATA_IN;
3996
3997                 ql_dbg(ql_dbg_io, vha, 0xff01,
3998                     "HOST-ABORT: state=DATA_IN.\n");
3999
4000                 ha->tgt.tgt_ops->handle_data(cmd);
4001                 return;
4002         } else {
4003                 ql_dbg(ql_dbg_io, vha, 0xff03,
4004                     "HOST-ABORT: state=BAD(%d).\n",
4005                     cmd->state);
4006                 dump_stack();
4007         }
4008
4009         cmd->trc_flags |= TRC_FLUSH;
4010         ha->tgt.tgt_ops->free_cmd(cmd);
4011 }
4012
4013 /*
4014  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4015  */
4016 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
4017     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
4018 {
4019         struct qla_hw_data *ha = vha->hw;
4020         struct se_cmd *se_cmd;
4021         struct qla_tgt_cmd *cmd;
4022         struct qla_qpair *qpair = rsp->qpair;
4023
4024         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
4025                 /* That could happen only in case of an error/reset/abort */
4026                 if (status != CTIO_SUCCESS) {
4027                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
4028                             "Intermediate CTIO received"
4029                             " (status %x)\n", status);
4030                 }
4031                 return;
4032         }
4033
4034         cmd = (struct qla_tgt_cmd *)qlt_ctio_to_cmd(vha, rsp, handle, ctio);
4035         if (cmd == NULL)
4036                 return;
4037
4038         se_cmd = &cmd->se_cmd;
4039         cmd->cmd_sent_to_fw = 0;
4040
4041         qlt_unmap_sg(vha, cmd);
4042
4043         if (unlikely(status != CTIO_SUCCESS)) {
4044                 switch (status & 0xFFFF) {
4045                 case CTIO_INVALID_RX_ID:
4046                         if (printk_ratelimit())
4047                                 dev_info(&vha->hw->pdev->dev,
4048                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
4049                                     vha->vp_idx, cmd->atio.u.isp24.attr,
4050                                     ((cmd->ctio_flags >> 9) & 0xf),
4051                                     cmd->ctio_flags);
4052
4053                         break;
4054                 case CTIO_LIP_RESET:
4055                 case CTIO_TARGET_RESET:
4056                 case CTIO_ABORTED:
4057                         /* driver request abort via Terminate exchange */
4058                 case CTIO_TIMEOUT:
4059                         /* They are OK */
4060                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4061                             "qla_target(%d): CTIO with "
4062                             "status %#x received, state %x, se_cmd %p, "
4063                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4064                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4065                             status, cmd->state, se_cmd);
4066                         break;
4067
4068                 case CTIO_PORT_LOGGED_OUT:
4069                 case CTIO_PORT_UNAVAILABLE:
4070                 {
4071                         int logged_out =
4072                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4073
4074                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4075                             "qla_target(%d): CTIO with %s status %x "
4076                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4077                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4078                             status, cmd->state, se_cmd);
4079
4080                         if (logged_out && cmd->sess) {
4081                                 /*
4082                                  * Session is already logged out, but we need
4083                                  * to notify initiator, who's not aware of this
4084                                  */
4085                                 cmd->sess->send_els_logo = 1;
4086                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4087                                     "%s %d %8phC post del sess\n",
4088                                     __func__, __LINE__, cmd->sess->port_name);
4089
4090                                 qlt_schedule_sess_for_deletion(cmd->sess);
4091                         }
4092                         break;
4093                 }
4094                 case CTIO_DIF_ERROR: {
4095                         struct ctio_crc_from_fw *crc =
4096                                 (struct ctio_crc_from_fw *)ctio;
4097                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4098                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4099                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4100                             "expect_dif[0x%llx]\n",
4101                             vha->vp_idx, status, cmd->state, se_cmd,
4102                             *((u64 *)&crc->actual_dif[0]),
4103                             *((u64 *)&crc->expected_dif[0]));
4104
4105                         qlt_handle_dif_error(qpair, cmd, ctio);
4106                         return;
4107                 }
4108                 default:
4109                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4110                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4111                             vha->vp_idx, status, cmd->state, se_cmd);
4112                         break;
4113                 }
4114
4115
4116                 /* "cmd->aborted" means
4117                  * cmd is already aborted/terminated, we don't
4118                  * need to terminate again.  The exchange is already
4119                  * cleaned up/freed at FW level.  Just cleanup at driver
4120                  * level.
4121                  */
4122                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4123                     (!cmd->aborted)) {
4124                         cmd->trc_flags |= TRC_CTIO_ERR;
4125                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4126                                 return;
4127                 }
4128         }
4129
4130         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4131                 cmd->trc_flags |= TRC_CTIO_DONE;
4132         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4133                 cmd->state = QLA_TGT_STATE_DATA_IN;
4134
4135                 if (status == CTIO_SUCCESS)
4136                         cmd->write_data_transferred = 1;
4137
4138                 ha->tgt.tgt_ops->handle_data(cmd);
4139                 return;
4140         } else if (cmd->aborted) {
4141                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4143                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4144         } else {
4145                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4146                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4147                     "qla_target(%d): A command in state (%d) should "
4148                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4149         }
4150
4151         if (unlikely(status != CTIO_SUCCESS) &&
4152                 !cmd->aborted) {
4153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4154                 dump_stack();
4155         }
4156
4157         ha->tgt.tgt_ops->free_cmd(cmd);
4158 }
4159
4160 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4161         uint8_t task_codes)
4162 {
4163         int fcp_task_attr;
4164
4165         switch (task_codes) {
4166         case ATIO_SIMPLE_QUEUE:
4167                 fcp_task_attr = TCM_SIMPLE_TAG;
4168                 break;
4169         case ATIO_HEAD_OF_QUEUE:
4170                 fcp_task_attr = TCM_HEAD_TAG;
4171                 break;
4172         case ATIO_ORDERED_QUEUE:
4173                 fcp_task_attr = TCM_ORDERED_TAG;
4174                 break;
4175         case ATIO_ACA_QUEUE:
4176                 fcp_task_attr = TCM_ACA_TAG;
4177                 break;
4178         case ATIO_UNTAGGED:
4179                 fcp_task_attr = TCM_SIMPLE_TAG;
4180                 break;
4181         default:
4182                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4183                     "qla_target: unknown task code %x, use ORDERED instead\n",
4184                     task_codes);
4185                 fcp_task_attr = TCM_ORDERED_TAG;
4186                 break;
4187         }
4188
4189         return fcp_task_attr;
4190 }
4191
4192 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4193                                         uint8_t *);
4194 /*
4195  * Process context for I/O path into tcm_qla2xxx code
4196  */
4197 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4198 {
4199         scsi_qla_host_t *vha = cmd->vha;
4200         struct qla_hw_data *ha = vha->hw;
4201         struct fc_port *sess = cmd->sess;
4202         struct atio_from_isp *atio = &cmd->atio;
4203         unsigned char *cdb;
4204         unsigned long flags;
4205         uint32_t data_length;
4206         int ret, fcp_task_attr, data_dir, bidi = 0;
4207         struct qla_qpair *qpair = cmd->qpair;
4208
4209         cmd->cmd_in_wq = 0;
4210         cmd->trc_flags |= TRC_DO_WORK;
4211
4212         if (cmd->aborted) {
4213                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4214                     "cmd with tag %u is aborted\n",
4215                     cmd->atio.u.isp24.exchange_addr);
4216                 goto out_term;
4217         }
4218
4219         spin_lock_init(&cmd->cmd_lock);
4220         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4221         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4222
4223         if (atio->u.isp24.fcp_cmnd.rddata &&
4224             atio->u.isp24.fcp_cmnd.wrdata) {
4225                 bidi = 1;
4226                 data_dir = DMA_TO_DEVICE;
4227         } else if (atio->u.isp24.fcp_cmnd.rddata)
4228                 data_dir = DMA_FROM_DEVICE;
4229         else if (atio->u.isp24.fcp_cmnd.wrdata)
4230                 data_dir = DMA_TO_DEVICE;
4231         else
4232                 data_dir = DMA_NONE;
4233
4234         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4235             atio->u.isp24.fcp_cmnd.task_attr);
4236         data_length = get_datalen_for_atio(atio);
4237
4238         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4239                                           fcp_task_attr, data_dir, bidi);
4240         if (ret != 0)
4241                 goto out_term;
4242         /*
4243          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4244          */
4245         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4246         ha->tgt.tgt_ops->put_sess(sess);
4247         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4248         return;
4249
4250 out_term:
4251         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4252         /*
4253          * cmd has not sent to target yet, so pass NULL as the second
4254          * argument to qlt_send_term_exchange() and free the memory here.
4255          */
4256         cmd->trc_flags |= TRC_DO_WORK_ERR;
4257         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4258         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4259
4260         qlt_decr_num_pend_cmds(vha);
4261         target_free_tag(sess->se_sess, &cmd->se_cmd);
4262         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4263
4264         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4265         ha->tgt.tgt_ops->put_sess(sess);
4266         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4267 }
4268
4269 static void qlt_do_work(struct work_struct *work)
4270 {
4271         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4272         scsi_qla_host_t *vha = cmd->vha;
4273         unsigned long flags;
4274
4275         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4276         list_del(&cmd->cmd_list);
4277         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4278
4279         __qlt_do_work(cmd);
4280 }
4281
4282 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4283 {
4284         unsigned long flags;
4285         struct qla_hw_data *ha = vha->hw;
4286         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4287         void *node;
4288         u64 key = 0;
4289
4290         ql_log(ql_log_info, vha, 0x706c,
4291             "User update Number of Active Qpairs %d\n",
4292             ha->tgt.num_act_qpairs);
4293
4294         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4295
4296         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4297                 btree_remove64(&tgt->lun_qpair_map, key);
4298
4299         ha->base_qpair->lun_cnt = 0;
4300         for (key = 0; key < ha->max_qpairs; key++)
4301                 if (ha->queue_pair_map[key])
4302                         ha->queue_pair_map[key]->lun_cnt = 0;
4303
4304         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4305 }
4306
4307 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4308         struct qla_tgt_cmd *cmd)
4309 {
4310         struct qla_qpair *qpair, *qp;
4311         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4312         struct qla_qpair_hint *h;
4313
4314         if (vha->flags.qpairs_available) {
4315                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4316                 if (unlikely(!h)) {
4317                         /* spread lun to qpair ratio evently */
4318                         int lcnt = 0, rc;
4319                         struct scsi_qla_host *base_vha =
4320                                 pci_get_drvdata(vha->hw->pdev);
4321
4322                         qpair = vha->hw->base_qpair;
4323                         if (qpair->lun_cnt == 0) {
4324                                 qpair->lun_cnt++;
4325                                 h = qla_qpair_to_hint(tgt, qpair);
4326                                 BUG_ON(!h);
4327                                 rc = btree_insert64(&tgt->lun_qpair_map,
4328                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4329                                 if (rc) {
4330                                         qpair->lun_cnt--;
4331                                         ql_log(ql_log_info, vha, 0xd037,
4332                                             "Unable to insert lun %llx into lun_qpair_map\n",
4333                                             cmd->unpacked_lun);
4334                                 }
4335                                 goto out;
4336                         } else {
4337                                 lcnt = qpair->lun_cnt;
4338                         }
4339
4340                         h = NULL;
4341                         list_for_each_entry(qp, &base_vha->qp_list,
4342                             qp_list_elem) {
4343                                 if (qp->lun_cnt == 0) {
4344                                         qp->lun_cnt++;
4345                                         h = qla_qpair_to_hint(tgt, qp);
4346                                         BUG_ON(!h);
4347                                         rc = btree_insert64(&tgt->lun_qpair_map,
4348                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4349                                         if (rc) {
4350                                                 qp->lun_cnt--;
4351                                                 ql_log(ql_log_info, vha, 0xd038,
4352                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4353                                                         cmd->unpacked_lun);
4354                                         }
4355                                         qpair = qp;
4356                                         goto out;
4357                                 } else {
4358                                         if (qp->lun_cnt < lcnt) {
4359                                                 lcnt = qp->lun_cnt;
4360                                                 qpair = qp;
4361                                                 continue;
4362                                         }
4363                                 }
4364                         }
4365                         BUG_ON(!qpair);
4366                         qpair->lun_cnt++;
4367                         h = qla_qpair_to_hint(tgt, qpair);
4368                         BUG_ON(!h);
4369                         rc = btree_insert64(&tgt->lun_qpair_map,
4370                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4371                         if (rc) {
4372                                 qpair->lun_cnt--;
4373                                 ql_log(ql_log_info, vha, 0xd039,
4374                                    "Unable to insert lun %llx into lun_qpair_map\n",
4375                                    cmd->unpacked_lun);
4376                         }
4377                 }
4378         } else {
4379                 h = &tgt->qphints[0];
4380         }
4381 out:
4382         cmd->qpair = h->qpair;
4383         cmd->se_cmd.cpuid = h->cpuid;
4384 }
4385
4386 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4387                                        struct fc_port *sess,
4388                                        struct atio_from_isp *atio)
4389 {
4390         struct se_session *se_sess = sess->se_sess;
4391         struct qla_tgt_cmd *cmd;
4392         int tag, cpu;
4393
4394         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4395         if (tag < 0)
4396                 return NULL;
4397
4398         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4399         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4400         cmd->cmd_type = TYPE_TGT_CMD;
4401         memcpy(&cmd->atio, atio, sizeof(*atio));
4402         cmd->state = QLA_TGT_STATE_NEW;
4403         cmd->tgt = vha->vha_tgt.qla_tgt;
4404         qlt_incr_num_pend_cmds(vha);
4405         cmd->vha = vha;
4406         cmd->se_cmd.map_tag = tag;
4407         cmd->se_cmd.map_cpu = cpu;
4408         cmd->sess = sess;
4409         cmd->loop_id = sess->loop_id;
4410         cmd->conf_compl_supported = sess->conf_compl_supported;
4411
4412         cmd->trc_flags = 0;
4413         cmd->jiffies_at_alloc = get_jiffies_64();
4414
4415         cmd->unpacked_lun = scsilun_to_int(
4416             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4417         qlt_assign_qpair(vha, cmd);
4418         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4419         cmd->vp_idx = vha->vp_idx;
4420
4421         return cmd;
4422 }
4423
4424 /* ha->hardware_lock supposed to be held on entry */
4425 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4426         struct atio_from_isp *atio)
4427 {
4428         struct qla_hw_data *ha = vha->hw;
4429         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4430         struct fc_port *sess;
4431         struct qla_tgt_cmd *cmd;
4432         unsigned long flags;
4433         port_id_t id;
4434
4435         if (unlikely(tgt->tgt_stop)) {
4436                 ql_dbg(ql_dbg_io, vha, 0x3061,
4437                     "New command while device %p is shutting down\n", tgt);
4438                 return -ENODEV;
4439         }
4440
4441         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4442         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4443         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4444         if (IS_SW_RESV_ADDR(id))
4445                 return -EBUSY;
4446
4447         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4448         if (unlikely(!sess))
4449                 return -EFAULT;
4450
4451         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4452          * session deletion, but it's still in sess_del_work wq */
4453         if (sess->deleted) {
4454                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4455                     "New command while old session %p is being deleted\n",
4456                     sess);
4457                 return -EFAULT;
4458         }
4459
4460         /*
4461          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4462          */
4463         if (!kref_get_unless_zero(&sess->sess_kref)) {
4464                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4465                     "%s: kref_get fail, %8phC oxid %x \n",
4466                     __func__, sess->port_name,
4467                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4468                 return -EFAULT;
4469         }
4470
4471         cmd = qlt_get_tag(vha, sess, atio);
4472         if (!cmd) {
4473                 ql_dbg(ql_dbg_io, vha, 0x3062,
4474                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4475                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4476                 ha->tgt.tgt_ops->put_sess(sess);
4477                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4478                 return -EBUSY;
4479         }
4480
4481         cmd->cmd_in_wq = 1;
4482         cmd->trc_flags |= TRC_NEW_CMD;
4483
4484         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4485         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4486         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4487
4488         INIT_WORK(&cmd->work, qlt_do_work);
4489         if (vha->flags.qpairs_available) {
4490                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4491         } else if (ha->msix_count) {
4492                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4493                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4494                             &cmd->work);
4495                 else
4496                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4497                             &cmd->work);
4498         } else {
4499                 queue_work(qla_tgt_wq, &cmd->work);
4500         }
4501
4502         return 0;
4503 }
4504
4505 /* ha->hardware_lock supposed to be held on entry */
4506 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4507         int fn, void *iocb, int flags)
4508 {
4509         struct scsi_qla_host *vha = sess->vha;
4510         struct qla_hw_data *ha = vha->hw;
4511         struct qla_tgt_mgmt_cmd *mcmd;
4512         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4513         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4514
4515         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4516         if (!mcmd) {
4517                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4518                     "qla_target(%d): Allocation of management "
4519                     "command failed, some commands and their data could "
4520                     "leak\n", vha->vp_idx);
4521                 return -ENOMEM;
4522         }
4523         memset(mcmd, 0, sizeof(*mcmd));
4524         mcmd->sess = sess;
4525
4526         if (iocb) {
4527                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4528                     sizeof(mcmd->orig_iocb.imm_ntfy));
4529         }
4530         mcmd->tmr_func = fn;
4531         mcmd->flags = flags;
4532         mcmd->reset_count = ha->base_qpair->chip_reset;
4533         mcmd->qpair = h->qpair;
4534         mcmd->vha = vha;
4535         mcmd->se_cmd.cpuid = h->cpuid;
4536         mcmd->unpacked_lun = lun;
4537
4538         switch (fn) {
4539         case QLA_TGT_LUN_RESET:
4540         case QLA_TGT_CLEAR_TS:
4541         case QLA_TGT_ABORT_TS:
4542                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4543                 /* fall through */
4544         case QLA_TGT_CLEAR_ACA:
4545                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4546                 mcmd->qpair = h->qpair;
4547                 mcmd->se_cmd.cpuid = h->cpuid;
4548                 break;
4549
4550         case QLA_TGT_TARGET_RESET:
4551         case QLA_TGT_NEXUS_LOSS_SESS:
4552         case QLA_TGT_NEXUS_LOSS:
4553         case QLA_TGT_ABORT_ALL:
4554         default:
4555                 /* no-op */
4556                 break;
4557         }
4558
4559         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4560         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4561             &mcmd->work);
4562
4563         return 0;
4564 }
4565
4566 /* ha->hardware_lock supposed to be held on entry */
4567 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4568 {
4569         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4570         struct qla_hw_data *ha = vha->hw;
4571         struct fc_port *sess;
4572         u64 unpacked_lun;
4573         int fn;
4574         unsigned long flags;
4575
4576         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4577
4578         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4579         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4580             a->u.isp24.fcp_hdr.s_id);
4581         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4582
4583         unpacked_lun =
4584             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4585
4586         if (sess == NULL || sess->deleted)
4587                 return -EFAULT;
4588
4589         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4590 }
4591
4592 /* ha->hardware_lock supposed to be held on entry */
4593 static int __qlt_abort_task(struct scsi_qla_host *vha,
4594         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4595 {
4596         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4597         struct qla_hw_data *ha = vha->hw;
4598         struct qla_tgt_mgmt_cmd *mcmd;
4599         u64 unpacked_lun;
4600         int rc;
4601
4602         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4603         if (mcmd == NULL) {
4604                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4605                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4606                     vha->vp_idx, __func__);
4607                 return -ENOMEM;
4608         }
4609         memset(mcmd, 0, sizeof(*mcmd));
4610
4611         mcmd->sess = sess;
4612         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4613             sizeof(mcmd->orig_iocb.imm_ntfy));
4614
4615         unpacked_lun =
4616             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4617         mcmd->reset_count = ha->base_qpair->chip_reset;
4618         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4619         mcmd->qpair = ha->base_qpair;
4620
4621         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4622             le16_to_cpu(iocb->u.isp2x.seq_id));
4623         if (rc != 0) {
4624                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4625                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4626                     vha->vp_idx, rc);
4627                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4628                 return -EFAULT;
4629         }
4630
4631         return 0;
4632 }
4633
4634 /* ha->hardware_lock supposed to be held on entry */
4635 static int qlt_abort_task(struct scsi_qla_host *vha,
4636         struct imm_ntfy_from_isp *iocb)
4637 {
4638         struct qla_hw_data *ha = vha->hw;
4639         struct fc_port *sess;
4640         int loop_id;
4641         unsigned long flags;
4642
4643         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4644
4645         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4646         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4647         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4648
4649         if (sess == NULL) {
4650                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4651                     "qla_target(%d): task abort for unexisting "
4652                     "session\n", vha->vp_idx);
4653                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4654                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4655         }
4656
4657         return __qlt_abort_task(vha, iocb, sess);
4658 }
4659
4660 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4661 {
4662         if (rc != MBS_COMMAND_COMPLETE) {
4663                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4664                         "%s: se_sess %p / sess %p from"
4665                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4666                         " LOGO failed: %#x\n",
4667                         __func__,
4668                         fcport->se_sess,
4669                         fcport,
4670                         fcport->port_name, fcport->loop_id,
4671                         fcport->d_id.b.domain, fcport->d_id.b.area,
4672                         fcport->d_id.b.al_pa, rc);
4673         }
4674
4675         fcport->logout_completed = 1;
4676 }
4677
4678 /*
4679 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4680 *
4681 * Schedules sessions with matching port_id/loop_id but different wwn for
4682 * deletion. Returns existing session with matching wwn if present.
4683 * Null otherwise.
4684 */
4685 struct fc_port *
4686 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4687     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4688 {
4689         struct fc_port *sess = NULL, *other_sess;
4690         uint64_t other_wwn;
4691
4692         *conflict_sess = NULL;
4693
4694         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4695
4696                 other_wwn = wwn_to_u64(other_sess->port_name);
4697
4698                 if (wwn == other_wwn) {
4699                         WARN_ON(sess);
4700                         sess = other_sess;
4701                         continue;
4702                 }
4703
4704                 /* find other sess with nport_id collision */
4705                 if (port_id.b24 == other_sess->d_id.b24) {
4706                         if (loop_id != other_sess->loop_id) {
4707                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4708                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4709                                     other_sess, other_sess->loop_id, other_wwn);
4710
4711                                 /*
4712                                  * logout_on_delete is set by default, but another
4713                                  * session that has the same s_id/loop_id combo
4714                                  * might have cleared it when requested this session
4715                                  * deletion, so don't touch it
4716                                  */
4717                                 qlt_schedule_sess_for_deletion(other_sess);
4718                         } else {
4719                                 /*
4720                                  * Another wwn used to have our s_id/loop_id
4721                                  * kill the session, but don't free the loop_id
4722                                  */
4723                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4724                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4725                                     other_sess, other_sess->loop_id, other_wwn);
4726
4727                                 other_sess->keep_nport_handle = 1;
4728                                 if (other_sess->disc_state != DSC_DELETED)
4729                                         *conflict_sess = other_sess;
4730                                 qlt_schedule_sess_for_deletion(other_sess);
4731                         }
4732                         continue;
4733                 }
4734
4735                 /* find other sess with nport handle collision */
4736                 if ((loop_id == other_sess->loop_id) &&
4737                         (loop_id != FC_NO_LOOP_ID)) {
4738                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4739                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4740                                other_sess, other_sess->loop_id, other_wwn);
4741
4742                         /* Same loop_id but different s_id
4743                          * Ok to kill and logout */
4744                         qlt_schedule_sess_for_deletion(other_sess);
4745                 }
4746         }
4747
4748         return sess;
4749 }
4750
4751 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4752 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4753 {
4754         struct qla_tgt_sess_op *op;
4755         struct qla_tgt_cmd *cmd;
4756         uint32_t key;
4757         int count = 0;
4758         unsigned long flags;
4759
4760         key = (((u32)s_id->b.domain << 16) |
4761                ((u32)s_id->b.area   <<  8) |
4762                ((u32)s_id->b.al_pa));
4763
4764         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4765         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4766                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4767
4768                 if (op_key == key) {
4769                         op->aborted = true;
4770                         count++;
4771                 }
4772         }
4773
4774         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4775                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4776                 if (op_key == key) {
4777                         op->aborted = true;
4778                         count++;
4779                 }
4780         }
4781
4782         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4783                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4784                 if (cmd_key == key) {
4785                         cmd->aborted = 1;
4786                         count++;
4787                 }
4788         }
4789         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4790
4791         return count;
4792 }
4793
4794 static int qlt_handle_login(struct scsi_qla_host *vha,
4795     struct imm_ntfy_from_isp *iocb)
4796 {
4797         struct fc_port *sess = NULL, *conflict_sess = NULL;
4798         uint64_t wwn;
4799         port_id_t port_id;
4800         uint16_t loop_id, wd3_lo;
4801         int res = 0;
4802         struct qlt_plogi_ack_t *pla;
4803         unsigned long flags;
4804
4805         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4806
4807         port_id.b.domain = iocb->u.isp24.port_id[2];
4808         port_id.b.area   = iocb->u.isp24.port_id[1];
4809         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4810         port_id.b.rsvd_1 = 0;
4811
4812         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4813
4814         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4815         abort_cmds_for_s_id(vha, &port_id);
4816
4817         if (wwn) {
4818                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4819                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4820                     port_id, loop_id, &conflict_sess);
4821                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4822         } else {
4823                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4824                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4825                     __func__, __LINE__, loop_id, port_id.b24);
4826                 qlt_send_term_imm_notif(vha, iocb, 1);
4827                 goto out;
4828         }
4829
4830         if (IS_SW_RESV_ADDR(port_id)) {
4831                 res = 1;
4832                 goto out;
4833         }
4834
4835         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4836         if (!pla) {
4837                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4838                     "%s %d %8phC Term INOT due to mem alloc fail",
4839                     __func__, __LINE__,
4840                     iocb->u.isp24.port_name);
4841                 qlt_send_term_imm_notif(vha, iocb, 1);
4842                 goto out;
4843         }
4844
4845         if (conflict_sess) {
4846                 conflict_sess->login_gen++;
4847                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4848                     QLT_PLOGI_LINK_CONFLICT);
4849         }
4850
4851         if (!sess) {
4852                 pla->ref_count++;
4853                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4854                     "%s %d %8phC post new sess\n",
4855                     __func__, __LINE__, iocb->u.isp24.port_name);
4856                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4857                         qla24xx_post_newsess_work(vha, &port_id,
4858                             iocb->u.isp24.port_name,
4859                             iocb->u.isp24.u.plogi.node_name,
4860                             pla, FC4_TYPE_UNKNOWN);
4861                 else
4862                         qla24xx_post_newsess_work(vha, &port_id,
4863                             iocb->u.isp24.port_name, NULL,
4864                             pla, FC4_TYPE_UNKNOWN);
4865
4866                 goto out;
4867         }
4868
4869         if (sess->disc_state == DSC_UPD_FCPORT) {
4870                 u16 sec;
4871
4872                 /*
4873                  * Remote port registration is still going on from
4874                  * previous login. Allow it to finish before we
4875                  * accept the new login.
4876                  */
4877                 sess->next_disc_state = DSC_DELETE_PEND;
4878                 sec = jiffies_to_msecs(jiffies -
4879                     sess->jiffies_at_registration) / 1000;
4880                 if (sess->sec_since_registration < sec && sec &&
4881                     !(sec % 5)) {
4882                         sess->sec_since_registration = sec;
4883                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4884                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4885                             __func__, sess->port_name, sec);
4886                 }
4887
4888                 if (!conflict_sess)
4889                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4890
4891                 qlt_send_term_imm_notif(vha, iocb, 1);
4892                 goto out;
4893         }
4894
4895         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4896         sess->d_id = port_id;
4897         sess->login_gen++;
4898
4899         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4900                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4901                 sess->local = 0;
4902                 sess->loop_id = loop_id;
4903                 sess->d_id = port_id;
4904                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4905                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4906
4907                 if (wd3_lo & BIT_7)
4908                         sess->conf_compl_supported = 1;
4909
4910                 if ((wd3_lo & BIT_4) == 0)
4911                         sess->port_type = FCT_INITIATOR;
4912                 else
4913                         sess->port_type = FCT_TARGET;
4914
4915         } else
4916                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4917
4918
4919         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4920             "%s %d %8phC  DS %d\n",
4921             __func__, __LINE__, sess->port_name, sess->disc_state);
4922
4923         switch (sess->disc_state) {
4924         case DSC_DELETED:
4925                 qlt_plogi_ack_unref(vha, pla);
4926                 break;
4927
4928         default:
4929                 /*
4930                  * Under normal circumstances we want to release nport handle
4931                  * during LOGO process to avoid nport handle leaks inside FW.
4932                  * The exception is when LOGO is done while another PLOGI with
4933                  * the same nport handle is waiting as might be the case here.
4934                  * Note: there is always a possibily of a race where session
4935                  * deletion has already started for other reasons (e.g. ACL
4936                  * removal) and now PLOGI arrives:
4937                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4938                  *    FW must have assigned this PLOGI a new/same handle and we
4939                  *    can proceed ACK'ing it as usual when session deletion
4940                  *    completes.
4941                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4942                  *    bit reached it, the handle has now been released. We'll
4943                  *    get an error when we ACK this PLOGI. Nothing will be sent
4944                  *    back to initiator. Initiator should eventually retry
4945                  *    PLOGI and situation will correct itself.
4946                  */
4947                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4948                     (sess->d_id.b24 == port_id.b24));
4949
4950                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4951                     "%s %d %8phC post del sess\n",
4952                     __func__, __LINE__, sess->port_name);
4953
4954
4955                 qlt_schedule_sess_for_deletion(sess);
4956                 break;
4957         }
4958 out:
4959         return res;
4960 }
4961
4962 /*
4963  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4964  */
4965 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4966         struct imm_ntfy_from_isp *iocb)
4967 {
4968         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4969         struct qla_hw_data *ha = vha->hw;
4970         struct fc_port *sess = NULL, *conflict_sess = NULL;
4971         uint64_t wwn;
4972         port_id_t port_id;
4973         uint16_t loop_id;
4974         uint16_t wd3_lo;
4975         int res = 0;
4976         unsigned long flags;
4977
4978         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4979
4980         port_id.b.domain = iocb->u.isp24.port_id[2];
4981         port_id.b.area   = iocb->u.isp24.port_id[1];
4982         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4983         port_id.b.rsvd_1 = 0;
4984
4985         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4986
4987         ql_dbg(ql_dbg_disc, vha, 0xf026,
4988             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4989             vha->vp_idx, iocb->u.isp24.port_id[2],
4990                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4991                    iocb->u.isp24.status_subcode, loop_id,
4992                 iocb->u.isp24.port_name);
4993
4994         /* res = 1 means ack at the end of thread
4995          * res = 0 means ack async/later.
4996          */
4997         switch (iocb->u.isp24.status_subcode) {
4998         case ELS_PLOGI:
4999                 res = qlt_handle_login(vha, iocb);
5000                 break;
5001
5002         case ELS_PRLI:
5003                 if (N2N_TOPO(ha)) {
5004                         sess = qla2x00_find_fcport_by_wwpn(vha,
5005                             iocb->u.isp24.port_name, 1);
5006
5007                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
5008                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5009                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
5010                                     __func__, __LINE__,
5011                                     iocb->u.isp24.port_name);
5012                                 qlt_send_term_imm_notif(vha, iocb, 1);
5013                                 break;
5014                         }
5015
5016                         res = qlt_handle_login(vha, iocb);
5017                         break;
5018                 }
5019
5020                 if (IS_SW_RESV_ADDR(port_id)) {
5021                         res = 1;
5022                         break;
5023                 }
5024
5025                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5026
5027                 if (wwn) {
5028                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5029                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5030                                 loop_id, &conflict_sess);
5031                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5032                 }
5033
5034                 if (conflict_sess) {
5035                         switch (conflict_sess->disc_state) {
5036                         case DSC_DELETED:
5037                         case DSC_DELETE_PEND:
5038                                 break;
5039                         default:
5040                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5041                                     "PRLI with conflicting sess %p port %8phC\n",
5042                                     conflict_sess, conflict_sess->port_name);
5043                                 conflict_sess->fw_login_state =
5044                                     DSC_LS_PORT_UNAVAIL;
5045                                 qlt_send_term_imm_notif(vha, iocb, 1);
5046                                 res = 0;
5047                                 break;
5048                         }
5049                 }
5050
5051                 if (sess != NULL) {
5052                         bool delete = false;
5053                         int sec;
5054                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5055                         switch (sess->fw_login_state) {
5056                         case DSC_LS_PLOGI_PEND:
5057                         case DSC_LS_PLOGI_COMP:
5058                         case DSC_LS_PRLI_COMP:
5059                                 break;
5060                         default:
5061                                 delete = true;
5062                                 break;
5063                         }
5064
5065                         switch (sess->disc_state) {
5066                         case DSC_UPD_FCPORT:
5067                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5068                                     flags);
5069
5070                                 sec = jiffies_to_msecs(jiffies -
5071                                     sess->jiffies_at_registration)/1000;
5072                                 if (sess->sec_since_registration < sec && sec &&
5073                                     !(sec % 5)) {
5074                                         sess->sec_since_registration = sec;
5075                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5076                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5077                                             __func__, sess->port_name, sec);
5078                                 }
5079                                 qlt_send_term_imm_notif(vha, iocb, 1);
5080                                 return 0;
5081
5082                         case DSC_LOGIN_PEND:
5083                         case DSC_GPDB:
5084                         case DSC_LOGIN_COMPLETE:
5085                         case DSC_ADISC:
5086                                 delete = false;
5087                                 break;
5088                         default:
5089                                 break;
5090                         }
5091
5092                         if (delete) {
5093                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5094                                     flags);
5095                                 /*
5096                                  * Impatient initiator sent PRLI before last
5097                                  * PLOGI could finish. Will force him to re-try,
5098                                  * while last one finishes.
5099                                  */
5100                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5101                                     "sess %p PRLI received, before plogi ack.\n",
5102                                     sess);
5103                                 qlt_send_term_imm_notif(vha, iocb, 1);
5104                                 res = 0;
5105                                 break;
5106                         }
5107
5108                         /*
5109                          * This shouldn't happen under normal circumstances,
5110                          * since we have deleted the old session during PLOGI
5111                          */
5112                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5113                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5114                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5115
5116                         sess->local = 0;
5117                         sess->loop_id = loop_id;
5118                         sess->d_id = port_id;
5119                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5120
5121                         if (wd3_lo & BIT_7)
5122                                 sess->conf_compl_supported = 1;
5123
5124                         if ((wd3_lo & BIT_4) == 0)
5125                                 sess->port_type = FCT_INITIATOR;
5126                         else
5127                                 sess->port_type = FCT_TARGET;
5128
5129                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5130                 }
5131                 res = 1; /* send notify ack */
5132
5133                 /* Make session global (not used in fabric mode) */
5134                 if (ha->current_topology != ISP_CFG_F) {
5135                         if (sess) {
5136                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5137                                     "%s %d %8phC post nack\n",
5138                                     __func__, __LINE__, sess->port_name);
5139                                 qla24xx_post_nack_work(vha, sess, iocb,
5140                                         SRB_NACK_PRLI);
5141                                 res = 0;
5142                         } else {
5143                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5144                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5145                                 qla2xxx_wake_dpc(vha);
5146                         }
5147                 } else {
5148                         if (sess) {
5149                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5150                                     "%s %d %8phC post nack\n",
5151                                     __func__, __LINE__, sess->port_name);
5152                                 qla24xx_post_nack_work(vha, sess, iocb,
5153                                         SRB_NACK_PRLI);
5154                                 res = 0;
5155                         }
5156                 }
5157                 break;
5158
5159         case ELS_TPRLO:
5160                 if (le16_to_cpu(iocb->u.isp24.flags) &
5161                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5162                         loop_id = 0xFFFF;
5163                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5164                         res = 1;
5165                         break;
5166                 }
5167                 /* fall through */
5168         case ELS_LOGO:
5169         case ELS_PRLO:
5170                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5171                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5172                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5173
5174                 if (sess) {
5175                         sess->login_gen++;
5176                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5177                         sess->logo_ack_needed = 1;
5178                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5179                 }
5180
5181                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5182
5183                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5184                     "%s: logo %llx res %d sess %p ",
5185                     __func__, wwn, res, sess);
5186                 if (res == 0) {
5187                         /*
5188                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5189                          * for LOGO_ACK & sess delete
5190                          */
5191                         BUG_ON(!sess);
5192                         res = 0;
5193                 } else {
5194                         /* cmd did not go to upper layer. */
5195                         if (sess) {
5196                                 qlt_schedule_sess_for_deletion(sess);
5197                                 res = 0;
5198                         }
5199                         /* else logo will be ack */
5200                 }
5201                 break;
5202         case ELS_PDISC:
5203         case ELS_ADISC:
5204         {
5205                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5206                 if (tgt->link_reinit_iocb_pending) {
5207                         qlt_send_notify_ack(ha->base_qpair,
5208                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5209                         tgt->link_reinit_iocb_pending = 0;
5210                 }
5211
5212                 sess = qla2x00_find_fcport_by_wwpn(vha,
5213                     iocb->u.isp24.port_name, 1);
5214                 if (sess) {
5215                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5216                                 "sess %p lid %d|%d DS %d LS %d\n",
5217                                 sess, sess->loop_id, loop_id,
5218                                 sess->disc_state, sess->fw_login_state);
5219                 }
5220
5221                 res = 1; /* send notify ack */
5222                 break;
5223         }
5224
5225         case ELS_FLOGI: /* should never happen */
5226         default:
5227                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5228                     "qla_target(%d): Unsupported ELS command %x "
5229                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5230                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5231                 break;
5232         }
5233
5234         ql_dbg(ql_dbg_disc, vha, 0xf026,
5235             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5236             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5237
5238         return res;
5239 }
5240
5241 /*
5242  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5243  */
5244 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5245         struct imm_ntfy_from_isp *iocb)
5246 {
5247         struct qla_hw_data *ha = vha->hw;
5248         uint32_t add_flags = 0;
5249         int send_notify_ack = 1;
5250         uint16_t status;
5251
5252         status = le16_to_cpu(iocb->u.isp2x.status);
5253         switch (status) {
5254         case IMM_NTFY_LIP_RESET:
5255         {
5256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5257                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5258                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5259                     iocb->u.isp24.status_subcode);
5260
5261                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5262                         send_notify_ack = 0;
5263                 break;
5264         }
5265
5266         case IMM_NTFY_LIP_LINK_REINIT:
5267         {
5268                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5269                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5270                     "qla_target(%d): LINK REINIT (loop %#x, "
5271                     "subcode %x)\n", vha->vp_idx,
5272                     le16_to_cpu(iocb->u.isp24.nport_handle),
5273                     iocb->u.isp24.status_subcode);
5274                 if (tgt->link_reinit_iocb_pending) {
5275                         qlt_send_notify_ack(ha->base_qpair,
5276                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5277                 }
5278                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5279                 tgt->link_reinit_iocb_pending = 1;
5280                 /*
5281                  * QLogic requires to wait after LINK REINIT for possible
5282                  * PDISC or ADISC ELS commands
5283                  */
5284                 send_notify_ack = 0;
5285                 break;
5286         }
5287
5288         case IMM_NTFY_PORT_LOGOUT:
5289                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5290                     "qla_target(%d): Port logout (loop "
5291                     "%#x, subcode %x)\n", vha->vp_idx,
5292                     le16_to_cpu(iocb->u.isp24.nport_handle),
5293                     iocb->u.isp24.status_subcode);
5294
5295                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5296                         send_notify_ack = 0;
5297                 /* The sessions will be cleared in the callback, if needed */
5298                 break;
5299
5300         case IMM_NTFY_GLBL_TPRLO:
5301                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5302                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5303                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5304                         send_notify_ack = 0;
5305                 /* The sessions will be cleared in the callback, if needed */
5306                 break;
5307
5308         case IMM_NTFY_PORT_CONFIG:
5309                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5310                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5311                     status);
5312                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5313                         send_notify_ack = 0;
5314                 /* The sessions will be cleared in the callback, if needed */
5315                 break;
5316
5317         case IMM_NTFY_GLBL_LOGO:
5318                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5319                     "qla_target(%d): Link failure detected\n",
5320                     vha->vp_idx);
5321                 /* I_T nexus loss */
5322                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5323                         send_notify_ack = 0;
5324                 break;
5325
5326         case IMM_NTFY_IOCB_OVERFLOW:
5327                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5328                     "qla_target(%d): Cannot provide requested "
5329                     "capability (IOCB overflowed the immediate notify "
5330                     "resource count)\n", vha->vp_idx);
5331                 break;
5332
5333         case IMM_NTFY_ABORT_TASK:
5334                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5335                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5336                     "L %#x)\n", vha->vp_idx,
5337                     le16_to_cpu(iocb->u.isp2x.seq_id),
5338                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5339                     le16_to_cpu(iocb->u.isp2x.lun));
5340                 if (qlt_abort_task(vha, iocb) == 0)
5341                         send_notify_ack = 0;
5342                 break;
5343
5344         case IMM_NTFY_RESOURCE:
5345                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5346                     "qla_target(%d): Out of resources, host %ld\n",
5347                     vha->vp_idx, vha->host_no);
5348                 break;
5349
5350         case IMM_NTFY_MSG_RX:
5351                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5352                     "qla_target(%d): Immediate notify task %x\n",
5353                     vha->vp_idx, iocb->u.isp2x.task_flags);
5354                 break;
5355
5356         case IMM_NTFY_ELS:
5357                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5358                         send_notify_ack = 0;
5359                 break;
5360         default:
5361                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5362                     "qla_target(%d): Received unknown immediate "
5363                     "notify status %x\n", vha->vp_idx, status);
5364                 break;
5365         }
5366
5367         if (send_notify_ack)
5368                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5369                     0, 0);
5370 }
5371
5372 /*
5373  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5374  * This function sends busy to ISP 2xxx or 24xx.
5375  */
5376 static int __qlt_send_busy(struct qla_qpair *qpair,
5377         struct atio_from_isp *atio, uint16_t status)
5378 {
5379         struct scsi_qla_host *vha = qpair->vha;
5380         struct ctio7_to_24xx *ctio24;
5381         struct qla_hw_data *ha = vha->hw;
5382         request_t *pkt;
5383         struct fc_port *sess = NULL;
5384         unsigned long flags;
5385         u16 temp;
5386         port_id_t id;
5387
5388         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
5389         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
5390         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
5391         id.b.rsvd_1 = 0;
5392
5393         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5394         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5395         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5396         if (!sess) {
5397                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5398                 return 0;
5399         }
5400         /* Sending marker isn't necessary, since we called from ISR */
5401
5402         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5403         if (!pkt) {
5404                 ql_dbg(ql_dbg_io, vha, 0x3063,
5405                     "qla_target(%d): %s failed: unable to allocate "
5406                     "request packet", vha->vp_idx, __func__);
5407                 return -ENOMEM;
5408         }
5409
5410         qpair->tgt_counters.num_q_full_sent++;
5411         pkt->entry_count = 1;
5412         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5413
5414         ctio24 = (struct ctio7_to_24xx *)pkt;
5415         ctio24->entry_type = CTIO_TYPE7;
5416         ctio24->nport_handle = sess->loop_id;
5417         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5418         ctio24->vp_index = vha->vp_idx;
5419         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5420         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5421         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5422         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5423         temp = (atio->u.isp24.attr << 9) |
5424                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5425                 CTIO7_FLAGS_DONT_RET_CTIO;
5426         ctio24->u.status1.flags = cpu_to_le16(temp);
5427         /*
5428          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5429          * if the explicit conformation is used.
5430          */
5431         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5432         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5433
5434         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5435
5436         if (ctio24->u.status1.residual != 0)
5437                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5438
5439         /* Memory Barrier */
5440         wmb();
5441         if (qpair->reqq_start_iocbs)
5442                 qpair->reqq_start_iocbs(qpair);
5443         else
5444                 qla2x00_start_iocbs(vha, qpair->req);
5445         return 0;
5446 }
5447
5448 /*
5449  * This routine is used to allocate a command for either a QFull condition
5450  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5451  * out previously.
5452  */
5453 static void
5454 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5455         struct atio_from_isp *atio, uint16_t status, int qfull)
5456 {
5457         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5458         struct qla_hw_data *ha = vha->hw;
5459         struct fc_port *sess;
5460         struct se_session *se_sess;
5461         struct qla_tgt_cmd *cmd;
5462         int tag, cpu;
5463         unsigned long flags;
5464
5465         if (unlikely(tgt->tgt_stop)) {
5466                 ql_dbg(ql_dbg_io, vha, 0x300a,
5467                         "New command while device %p is shutting down\n", tgt);
5468                 return;
5469         }
5470
5471         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5472                 vha->hw->tgt.num_qfull_cmds_dropped++;
5473                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5474                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5475                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5476                                 vha->hw->tgt.num_qfull_cmds_dropped;
5477
5478                 ql_dbg(ql_dbg_io, vha, 0x3068,
5479                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5480                         vha->vp_idx, __func__,
5481                         vha->hw->tgt.num_qfull_cmds_dropped);
5482
5483                 qlt_chk_exch_leak_thresh_hold(vha);
5484                 return;
5485         }
5486
5487         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5488                 (vha, atio->u.isp24.fcp_hdr.s_id);
5489         if (!sess)
5490                 return;
5491
5492         se_sess = sess->se_sess;
5493
5494         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5495         if (tag < 0)
5496                 return;
5497
5498         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5499         if (!cmd) {
5500                 ql_dbg(ql_dbg_io, vha, 0x3009,
5501                         "qla_target(%d): %s: Allocation of cmd failed\n",
5502                         vha->vp_idx, __func__);
5503
5504                 vha->hw->tgt.num_qfull_cmds_dropped++;
5505                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5506                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5507                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5508                                 vha->hw->tgt.num_qfull_cmds_dropped;
5509
5510                 qlt_chk_exch_leak_thresh_hold(vha);
5511                 return;
5512         }
5513
5514         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5515
5516         qlt_incr_num_pend_cmds(vha);
5517         INIT_LIST_HEAD(&cmd->cmd_list);
5518         memcpy(&cmd->atio, atio, sizeof(*atio));
5519
5520         cmd->tgt = vha->vha_tgt.qla_tgt;
5521         cmd->vha = vha;
5522         cmd->reset_count = ha->base_qpair->chip_reset;
5523         cmd->q_full = 1;
5524         cmd->qpair = ha->base_qpair;
5525         cmd->se_cmd.map_cpu = cpu;
5526
5527         if (qfull) {
5528                 cmd->q_full = 1;
5529                 /* NOTE: borrowing the state field to carry the status */
5530                 cmd->state = status;
5531         } else
5532                 cmd->term_exchg = 1;
5533
5534         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5535         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5536
5537         vha->hw->tgt.num_qfull_cmds_alloc++;
5538         if (vha->hw->tgt.num_qfull_cmds_alloc >
5539                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5540                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5541                         vha->hw->tgt.num_qfull_cmds_alloc;
5542         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5543 }
5544
5545 int
5546 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5547 {
5548         struct scsi_qla_host *vha = qpair->vha;
5549         struct qla_hw_data *ha = vha->hw;
5550         unsigned long flags;
5551         struct qla_tgt_cmd *cmd, *tcmd;
5552         struct list_head free_list, q_full_list;
5553         int rc = 0;
5554
5555         if (list_empty(&ha->tgt.q_full_list))
5556                 return 0;
5557
5558         INIT_LIST_HEAD(&free_list);
5559         INIT_LIST_HEAD(&q_full_list);
5560
5561         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5562         if (list_empty(&ha->tgt.q_full_list)) {
5563                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5564                 return 0;
5565         }
5566
5567         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5568         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5569
5570         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5571         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5572                 if (cmd->q_full)
5573                         /* cmd->state is a borrowed field to hold status */
5574                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5575                 else if (cmd->term_exchg)
5576                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5577
5578                 if (rc == -ENOMEM)
5579                         break;
5580
5581                 if (cmd->q_full)
5582                         ql_dbg(ql_dbg_io, vha, 0x3006,
5583                             "%s: busy sent for ox_id[%04x]\n", __func__,
5584                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5585                 else if (cmd->term_exchg)
5586                         ql_dbg(ql_dbg_io, vha, 0x3007,
5587                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5588                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5589                 else
5590                         ql_dbg(ql_dbg_io, vha, 0x3008,
5591                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5592                             cmd);
5593
5594                 list_del(&cmd->cmd_list);
5595                 list_add_tail(&cmd->cmd_list, &free_list);
5596
5597                 /* piggy back on hardware_lock for protection */
5598                 vha->hw->tgt.num_qfull_cmds_alloc--;
5599         }
5600         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5601
5602         cmd = NULL;
5603
5604         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5605                 list_del(&cmd->cmd_list);
5606                 /* This cmd was never sent to TCM.  There is no need
5607                  * to schedule free or call free_cmd
5608                  */
5609                 qlt_free_cmd(cmd);
5610         }
5611
5612         if (!list_empty(&q_full_list)) {
5613                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5614                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5615                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5616         }
5617
5618         return rc;
5619 }
5620
5621 static void
5622 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5623     uint16_t status)
5624 {
5625         int rc = 0;
5626         struct scsi_qla_host *vha = qpair->vha;
5627
5628         rc = __qlt_send_busy(qpair, atio, status);
5629         if (rc == -ENOMEM)
5630                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5631 }
5632
5633 static int
5634 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5635         struct atio_from_isp *atio, uint8_t ha_locked)
5636 {
5637         struct qla_hw_data *ha = vha->hw;
5638         unsigned long flags;
5639
5640         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5641                 return 0;
5642
5643         if (!ha_locked)
5644                 spin_lock_irqsave(&ha->hardware_lock, flags);
5645         qlt_send_busy(qpair, atio, qla_sam_status);
5646         if (!ha_locked)
5647                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5648
5649         return 1;
5650 }
5651
5652 /* ha->hardware_lock supposed to be held on entry */
5653 /* called via callback from qla2xxx */
5654 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5655         struct atio_from_isp *atio, uint8_t ha_locked)
5656 {
5657         struct qla_hw_data *ha = vha->hw;
5658         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5659         int rc;
5660         unsigned long flags = 0;
5661
5662         if (unlikely(tgt == NULL)) {
5663                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5664                     "ATIO pkt, but no tgt (ha %p)", ha);
5665                 return;
5666         }
5667         /*
5668          * In tgt_stop mode we also should allow all requests to pass.
5669          * Otherwise, some commands can stuck.
5670          */
5671
5672         tgt->atio_irq_cmd_count++;
5673
5674         switch (atio->u.raw.entry_type) {
5675         case ATIO_TYPE7:
5676                 if (unlikely(atio->u.isp24.exchange_addr ==
5677                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5678                         ql_dbg(ql_dbg_io, vha, 0x3065,
5679                             "qla_target(%d): ATIO_TYPE7 "
5680                             "received with UNKNOWN exchange address, "
5681                             "sending QUEUE_FULL\n", vha->vp_idx);
5682                         if (!ha_locked)
5683                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5684                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5685                         if (!ha_locked)
5686                                 spin_unlock_irqrestore(&ha->hardware_lock,
5687                                     flags);
5688                         break;
5689                 }
5690
5691                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5692                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5693                             atio, ha_locked);
5694                         if (rc != 0) {
5695                                 tgt->atio_irq_cmd_count--;
5696                                 return;
5697                         }
5698                         rc = qlt_handle_cmd_for_atio(vha, atio);
5699                 } else {
5700                         rc = qlt_handle_task_mgmt(vha, atio);
5701                 }
5702                 if (unlikely(rc != 0)) {
5703                         if (!ha_locked)
5704                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5705                         switch (rc) {
5706                         case -ENODEV:
5707                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5708                                     "qla_target: Unable to send command to target\n");
5709                                 break;
5710                         case -EBADF:
5711                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5712                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5713                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5714                                     atio, 1, 0);
5715                                 break;
5716                         case -EBUSY:
5717                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5718                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5719                                     vha->vp_idx);
5720                                 qlt_send_busy(ha->base_qpair, atio,
5721                                     tc_sam_status);
5722                                 break;
5723                         default:
5724                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5725                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5726                                     vha->vp_idx);
5727                                 qlt_send_busy(ha->base_qpair, atio,
5728                                     qla_sam_status);
5729                                 break;
5730                         }
5731                         if (!ha_locked)
5732                                 spin_unlock_irqrestore(&ha->hardware_lock,
5733                                     flags);
5734                 }
5735                 break;
5736
5737         case IMMED_NOTIFY_TYPE:
5738         {
5739                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5740                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5741                             "qla_target(%d): Received ATIO packet %x "
5742                             "with error status %x\n", vha->vp_idx,
5743                             atio->u.raw.entry_type,
5744                             atio->u.isp2x.entry_status);
5745                         break;
5746                 }
5747                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5748
5749                 if (!ha_locked)
5750                         spin_lock_irqsave(&ha->hardware_lock, flags);
5751                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5752                 if (!ha_locked)
5753                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5754                 break;
5755         }
5756
5757         default:
5758                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5759                     "qla_target(%d): Received unknown ATIO atio "
5760                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5761                 break;
5762         }
5763
5764         tgt->atio_irq_cmd_count--;
5765 }
5766
5767 /*
5768  * qpair lock is assume to be held
5769  * rc = 0 : send terminate & abts respond
5770  * rc != 0: do not send term & abts respond
5771  */
5772 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5773     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5774 {
5775         struct qla_hw_data *ha = vha->hw;
5776         int rc = 0;
5777
5778         /*
5779          * Detect unresolved exchange. If the same ABTS is unable
5780          * to terminate an existing command and the same ABTS loops
5781          * between FW & Driver, then force FW dump. Under 1 jiff,
5782          * we should see multiple loops.
5783          */
5784         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5785             qpair->retry_term_jiff == jiffies) {
5786                 /* found existing exchange */
5787                 qpair->retry_term_cnt++;
5788                 if (qpair->retry_term_cnt >= 5) {
5789                         rc = EIO;
5790                         qpair->retry_term_cnt = 0;
5791                         ql_log(ql_log_warn, vha, 0xffff,
5792                             "Unable to send ABTS Respond. Dumping firmware.\n");
5793                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5794                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5795
5796                         if (qpair == ha->base_qpair)
5797                                 ha->isp_ops->fw_dump(vha, 1);
5798                         else
5799                                 ha->isp_ops->fw_dump(vha, 0);
5800
5801                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5802                         qla2xxx_wake_dpc(vha);
5803                 }
5804         } else if (qpair->retry_term_jiff != jiffies) {
5805                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5806                 qpair->retry_term_cnt = 0;
5807                 qpair->retry_term_jiff = jiffies;
5808         }
5809
5810         return rc;
5811 }
5812
5813
5814 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5815         struct rsp_que *rsp, response_t *pkt)
5816 {
5817         struct abts_resp_from_24xx_fw *entry =
5818                 (struct abts_resp_from_24xx_fw *)pkt;
5819         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5820         struct qla_tgt_mgmt_cmd *mcmd;
5821         struct qla_hw_data *ha = vha->hw;
5822
5823         mcmd = (struct qla_tgt_mgmt_cmd *)qlt_ctio_to_cmd(vha, rsp,
5824             pkt->handle, pkt);
5825         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5826                 ql_dbg(ql_dbg_async, vha, 0xe064,
5827                     "qla_target(%d): ABTS Comp without mcmd\n",
5828                     vha->vp_idx);
5829                 return;
5830         }
5831
5832         if (mcmd)
5833                 vha  = mcmd->vha;
5834         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5835
5836         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5837             "ABTS_RESP_24XX: compl_status %x\n",
5838             entry->compl_status);
5839
5840         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5841                 if ((entry->error_subcode1 == 0x1E) &&
5842                     (entry->error_subcode2 == 0)) {
5843                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5844                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5845                                 return;
5846                         }
5847                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5848                             pkt, mcmd);
5849                 } else {
5850                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5851                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5852                             vha->vp_idx, entry->compl_status,
5853                             entry->error_subcode1,
5854                             entry->error_subcode2);
5855                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5856                 }
5857         } else {
5858                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5859         }
5860 }
5861
5862 /* ha->hardware_lock supposed to be held on entry */
5863 /* called via callback from qla2xxx */
5864 static void qlt_response_pkt(struct scsi_qla_host *vha,
5865         struct rsp_que *rsp, response_t *pkt)
5866 {
5867         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5868
5869         if (unlikely(tgt == NULL)) {
5870                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5871                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5872                     vha->vp_idx, pkt->entry_type, vha->hw);
5873                 return;
5874         }
5875
5876         /*
5877          * In tgt_stop mode we also should allow all requests to pass.
5878          * Otherwise, some commands can stuck.
5879          */
5880
5881         switch (pkt->entry_type) {
5882         case CTIO_CRC2:
5883         case CTIO_TYPE7:
5884         {
5885                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5886                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5887                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5888                     entry);
5889                 break;
5890         }
5891
5892         case ACCEPT_TGT_IO_TYPE:
5893         {
5894                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5895                 int rc;
5896                 if (atio->u.isp2x.status !=
5897                     cpu_to_le16(ATIO_CDB_VALID)) {
5898                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5899                             "qla_target(%d): ATIO with error "
5900                             "status %x received\n", vha->vp_idx,
5901                             le16_to_cpu(atio->u.isp2x.status));
5902                         break;
5903                 }
5904
5905                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5906                 if (rc != 0)
5907                         return;
5908
5909                 rc = qlt_handle_cmd_for_atio(vha, atio);
5910                 if (unlikely(rc != 0)) {
5911                         switch (rc) {
5912                         case -ENODEV:
5913                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5914                                     "qla_target: Unable to send command to target\n");
5915                                 break;
5916                         case -EBADF:
5917                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5918                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5919                                 qlt_send_term_exchange(rsp->qpair, NULL,
5920                                     atio, 1, 0);
5921                                 break;
5922                         case -EBUSY:
5923                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5924                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5925                                     vha->vp_idx);
5926                                 qlt_send_busy(rsp->qpair, atio,
5927                                     tc_sam_status);
5928                                 break;
5929                         default:
5930                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5931                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5932                                     vha->vp_idx);
5933                                 qlt_send_busy(rsp->qpair, atio,
5934                                     qla_sam_status);
5935                                 break;
5936                         }
5937                 }
5938         }
5939         break;
5940
5941         case CONTINUE_TGT_IO_TYPE:
5942         {
5943                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5944                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5945                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5946                     entry);
5947                 break;
5948         }
5949
5950         case CTIO_A64_TYPE:
5951         {
5952                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5953                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5954                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5955                     entry);
5956                 break;
5957         }
5958
5959         case IMMED_NOTIFY_TYPE:
5960                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5961                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5962                 break;
5963
5964         case NOTIFY_ACK_TYPE:
5965                 if (tgt->notify_ack_expected > 0) {
5966                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5967                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5968                             "NOTIFY_ACK seq %08x status %x\n",
5969                             le16_to_cpu(entry->u.isp2x.seq_id),
5970                             le16_to_cpu(entry->u.isp2x.status));
5971                         tgt->notify_ack_expected--;
5972                         if (entry->u.isp2x.status !=
5973                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5974                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5975                                     "qla_target(%d): NOTIFY_ACK "
5976                                     "failed %x\n", vha->vp_idx,
5977                                     le16_to_cpu(entry->u.isp2x.status));
5978                         }
5979                 } else {
5980                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5981                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5982                             vha->vp_idx);
5983                 }
5984                 break;
5985
5986         case ABTS_RECV_24XX:
5987                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5988                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5989                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5990                 break;
5991
5992         case ABTS_RESP_24XX:
5993                 if (tgt->abts_resp_expected > 0) {
5994                         qlt_handle_abts_completion(vha, rsp, pkt);
5995                 } else {
5996                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5997                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5998                             "received\n", vha->vp_idx);
5999                 }
6000                 break;
6001
6002         default:
6003                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
6004                     "qla_target(%d): Received unknown response pkt "
6005                     "type %x\n", vha->vp_idx, pkt->entry_type);
6006                 break;
6007         }
6008
6009 }
6010
6011 /*
6012  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6013  */
6014 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6015         uint16_t *mailbox)
6016 {
6017         struct qla_hw_data *ha = vha->hw;
6018         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6019         int login_code;
6020
6021         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6022                 return;
6023
6024         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6025             IS_QLA2100(ha))
6026                 return;
6027         /*
6028          * In tgt_stop mode we also should allow all requests to pass.
6029          * Otherwise, some commands can stuck.
6030          */
6031
6032
6033         switch (code) {
6034         case MBA_RESET:                 /* Reset */
6035         case MBA_SYSTEM_ERR:            /* System Error */
6036         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6037         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6039                     "qla_target(%d): System error async event %#x "
6040                     "occurred", vha->vp_idx, code);
6041                 break;
6042         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6043                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6044                 break;
6045
6046         case MBA_LOOP_UP:
6047         {
6048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6049                     "qla_target(%d): Async LOOP_UP occurred "
6050                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6051                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6052                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6053                 if (tgt->link_reinit_iocb_pending) {
6054                         qlt_send_notify_ack(ha->base_qpair,
6055                             (void *)&tgt->link_reinit_iocb,
6056                             0, 0, 0, 0, 0, 0);
6057                         tgt->link_reinit_iocb_pending = 0;
6058                 }
6059                 break;
6060         }
6061
6062         case MBA_LIP_OCCURRED:
6063         case MBA_LOOP_DOWN:
6064         case MBA_LIP_RESET:
6065         case MBA_RSCN_UPDATE:
6066                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6067                     "qla_target(%d): Async event %#x occurred "
6068                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6069                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6070                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6071                 break;
6072
6073         case MBA_REJECTED_FCP_CMD:
6074                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6075                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6076                     vha->vp_idx,
6077                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6078                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6079
6080                 if (le16_to_cpu(mailbox[3]) == 1) {
6081                         /* exchange starvation. */
6082                         vha->hw->exch_starvation++;
6083                         if (vha->hw->exch_starvation > 5) {
6084                                 ql_log(ql_log_warn, vha, 0xd03a,
6085                                     "Exchange starvation-. Resetting RISC\n");
6086
6087                                 vha->hw->exch_starvation = 0;
6088                                 if (IS_P3P_TYPE(vha->hw))
6089                                         set_bit(FCOE_CTX_RESET_NEEDED,
6090                                             &vha->dpc_flags);
6091                                 else
6092                                         set_bit(ISP_ABORT_NEEDED,
6093                                             &vha->dpc_flags);
6094                                 qla2xxx_wake_dpc(vha);
6095                         }
6096                 }
6097                 break;
6098
6099         case MBA_PORT_UPDATE:
6100                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6101                     "qla_target(%d): Port update async event %#x "
6102                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6103                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6104                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6105                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6106
6107                 login_code = le16_to_cpu(mailbox[2]);
6108                 if (login_code == 0x4) {
6109                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6110                             "Async MB 2: Got PLOGI Complete\n");
6111                         vha->hw->exch_starvation = 0;
6112                 } else if (login_code == 0x7)
6113                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6114                             "Async MB 2: Port Logged Out\n");
6115                 break;
6116         default:
6117                 break;
6118         }
6119
6120 }
6121
6122 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6123         uint16_t loop_id)
6124 {
6125         fc_port_t *fcport, *tfcp, *del;
6126         int rc;
6127         unsigned long flags;
6128         u8 newfcport = 0;
6129
6130         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6131         if (!fcport) {
6132                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6133                     "qla_target(%d): Allocation of tmp FC port failed",
6134                     vha->vp_idx);
6135                 return NULL;
6136         }
6137
6138         fcport->loop_id = loop_id;
6139
6140         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6141         if (rc != QLA_SUCCESS) {
6142                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6143                     "qla_target(%d): Failed to retrieve fcport "
6144                     "information -- get_port_database() returned %x "
6145                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6146                 kfree(fcport);
6147                 return NULL;
6148         }
6149
6150         del = NULL;
6151         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6152         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6153
6154         if (tfcp) {
6155                 tfcp->d_id = fcport->d_id;
6156                 tfcp->port_type = fcport->port_type;
6157                 tfcp->supported_classes = fcport->supported_classes;
6158                 tfcp->flags |= fcport->flags;
6159                 tfcp->scan_state = QLA_FCPORT_FOUND;
6160
6161                 del = fcport;
6162                 fcport = tfcp;
6163         } else {
6164                 if (vha->hw->current_topology == ISP_CFG_F)
6165                         fcport->flags |= FCF_FABRIC_DEVICE;
6166
6167                 list_add_tail(&fcport->list, &vha->vp_fcports);
6168                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6169                    vha->fcport_count++;
6170                 fcport->login_gen++;
6171                 fcport->disc_state = DSC_LOGIN_COMPLETE;
6172                 fcport->login_succ = 1;
6173                 newfcport = 1;
6174         }
6175
6176         fcport->deleted = 0;
6177         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6178
6179         switch (vha->host->active_mode) {
6180         case MODE_INITIATOR:
6181         case MODE_DUAL:
6182                 if (newfcport) {
6183                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6184                                 qla24xx_sched_upd_fcport(fcport);
6185                         } else {
6186                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6187                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6188                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6189                                 qla24xx_post_gpsc_work(vha, fcport);
6190                         }
6191                 }
6192                 break;
6193
6194         case MODE_TARGET:
6195         default:
6196                 break;
6197         }
6198         if (del)
6199                 qla2x00_free_fcport(del);
6200
6201         return fcport;
6202 }
6203
6204 /* Must be called under tgt_mutex */
6205 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6206         uint8_t *s_id)
6207 {
6208         struct fc_port *sess = NULL;
6209         fc_port_t *fcport = NULL;
6210         int rc, global_resets;
6211         uint16_t loop_id = 0;
6212
6213         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
6214                 /*
6215                  * This is Domain Controller, so it should be
6216                  * OK to drop SCSI commands from it.
6217                  */
6218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6219                     "Unable to find initiator with S_ID %x:%x:%x",
6220                     s_id[0], s_id[1], s_id[2]);
6221                 return NULL;
6222         }
6223
6224         mutex_lock(&vha->vha_tgt.tgt_mutex);
6225
6226 retry:
6227         global_resets =
6228             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6229
6230         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6231         if (rc != 0) {
6232                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6233
6234                 ql_log(ql_log_info, vha, 0xf071,
6235                     "qla_target(%d): Unable to find "
6236                     "initiator with S_ID %x:%x:%x",
6237                     vha->vp_idx, s_id[0], s_id[1],
6238                     s_id[2]);
6239
6240                 if (rc == -ENOENT) {
6241                         qlt_port_logo_t logo;
6242                         sid_to_portid(s_id, &logo.id);
6243                         logo.cmd_count = 1;
6244                         qlt_send_first_logo(vha, &logo);
6245                 }
6246
6247                 return NULL;
6248         }
6249
6250         fcport = qlt_get_port_database(vha, loop_id);
6251         if (!fcport) {
6252                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6253                 return NULL;
6254         }
6255
6256         if (global_resets !=
6257             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6258                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6259                     "qla_target(%d): global reset during session discovery "
6260                     "(counter was %d, new %d), retrying", vha->vp_idx,
6261                     global_resets,
6262                     atomic_read(&vha->vha_tgt.
6263                         qla_tgt->tgt_global_resets_count));
6264                 goto retry;
6265         }
6266
6267         sess = qlt_create_sess(vha, fcport, true);
6268
6269         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6270
6271         return sess;
6272 }
6273
6274 static void qlt_abort_work(struct qla_tgt *tgt,
6275         struct qla_tgt_sess_work_param *prm)
6276 {
6277         struct scsi_qla_host *vha = tgt->vha;
6278         struct qla_hw_data *ha = vha->hw;
6279         struct fc_port *sess = NULL;
6280         unsigned long flags = 0, flags2 = 0;
6281         uint32_t be_s_id;
6282         uint8_t s_id[3];
6283         int rc;
6284
6285         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6286
6287         if (tgt->tgt_stop)
6288                 goto out_term2;
6289
6290         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
6291         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
6292         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
6293
6294         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
6295             (unsigned char *)&be_s_id);
6296         if (!sess) {
6297                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6298
6299                 sess = qlt_make_local_sess(vha, s_id);
6300                 /* sess has got an extra creation ref */
6301
6302                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6303                 if (!sess)
6304                         goto out_term2;
6305         } else {
6306                 if (sess->deleted) {
6307                         sess = NULL;
6308                         goto out_term2;
6309                 }
6310
6311                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6312                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6313                             "%s: kref_get fail %8phC \n",
6314                              __func__, sess->port_name);
6315                         sess = NULL;
6316                         goto out_term2;
6317                 }
6318         }
6319
6320         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6321         ha->tgt.tgt_ops->put_sess(sess);
6322         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6323
6324         if (rc != 0)
6325                 goto out_term;
6326         return;
6327
6328 out_term2:
6329         if (sess)
6330                 ha->tgt.tgt_ops->put_sess(sess);
6331         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6332
6333 out_term:
6334         spin_lock_irqsave(&ha->hardware_lock, flags);
6335         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6336             FCP_TMF_REJECTED, false);
6337         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6338 }
6339
6340 static void qlt_tmr_work(struct qla_tgt *tgt,
6341         struct qla_tgt_sess_work_param *prm)
6342 {
6343         struct atio_from_isp *a = &prm->tm_iocb2;
6344         struct scsi_qla_host *vha = tgt->vha;
6345         struct qla_hw_data *ha = vha->hw;
6346         struct fc_port *sess = NULL;
6347         unsigned long flags;
6348         uint8_t *s_id = NULL; /* to hide compiler warnings */
6349         int rc;
6350         u64 unpacked_lun;
6351         int fn;
6352         void *iocb;
6353
6354         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6355
6356         if (tgt->tgt_stop)
6357                 goto out_term2;
6358
6359         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6360         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6361         if (!sess) {
6362                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6363
6364                 sess = qlt_make_local_sess(vha, s_id);
6365                 /* sess has got an extra creation ref */
6366
6367                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6368                 if (!sess)
6369                         goto out_term2;
6370         } else {
6371                 if (sess->deleted) {
6372                         sess = NULL;
6373                         goto out_term2;
6374                 }
6375
6376                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6377                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6378                             "%s: kref_get fail %8phC\n",
6379                              __func__, sess->port_name);
6380                         sess = NULL;
6381                         goto out_term2;
6382                 }
6383         }
6384
6385         iocb = a;
6386         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6387         unpacked_lun =
6388             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6389
6390         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6391         ha->tgt.tgt_ops->put_sess(sess);
6392         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6393
6394         if (rc != 0)
6395                 goto out_term;
6396         return;
6397
6398 out_term2:
6399         if (sess)
6400                 ha->tgt.tgt_ops->put_sess(sess);
6401         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6402 out_term:
6403         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6404 }
6405
6406 static void qlt_sess_work_fn(struct work_struct *work)
6407 {
6408         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6409         struct scsi_qla_host *vha = tgt->vha;
6410         unsigned long flags;
6411
6412         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6413
6414         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6415         while (!list_empty(&tgt->sess_works_list)) {
6416                 struct qla_tgt_sess_work_param *prm = list_entry(
6417                     tgt->sess_works_list.next, typeof(*prm),
6418                     sess_works_list_entry);
6419
6420                 /*
6421                  * This work can be scheduled on several CPUs at time, so we
6422                  * must delete the entry to eliminate double processing
6423                  */
6424                 list_del(&prm->sess_works_list_entry);
6425
6426                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6427
6428                 switch (prm->type) {
6429                 case QLA_TGT_SESS_WORK_ABORT:
6430                         qlt_abort_work(tgt, prm);
6431                         break;
6432                 case QLA_TGT_SESS_WORK_TM:
6433                         qlt_tmr_work(tgt, prm);
6434                         break;
6435                 default:
6436                         BUG_ON(1);
6437                         break;
6438                 }
6439
6440                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6441
6442                 kfree(prm);
6443         }
6444         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6445 }
6446
6447 /* Must be called under tgt_host_action_mutex */
6448 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6449 {
6450         struct qla_tgt *tgt;
6451         int rc, i;
6452         struct qla_qpair_hint *h;
6453
6454         if (!QLA_TGT_MODE_ENABLED())
6455                 return 0;
6456
6457         if (!IS_TGT_MODE_CAPABLE(ha)) {
6458                 ql_log(ql_log_warn, base_vha, 0xe070,
6459                     "This adapter does not support target mode.\n");
6460                 return 0;
6461         }
6462
6463         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6464             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6465
6466         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6467
6468         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6469         if (!tgt) {
6470                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6471                     "Unable to allocate struct qla_tgt\n");
6472                 return -ENOMEM;
6473         }
6474
6475         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6476                                sizeof(struct qla_qpair_hint),
6477                                GFP_KERNEL);
6478         if (!tgt->qphints) {
6479                 kfree(tgt);
6480                 ql_log(ql_log_warn, base_vha, 0x0197,
6481                     "Unable to allocate qpair hints.\n");
6482                 return -ENOMEM;
6483         }
6484
6485         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6486                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6487
6488         rc = btree_init64(&tgt->lun_qpair_map);
6489         if (rc) {
6490                 kfree(tgt->qphints);
6491                 kfree(tgt);
6492                 ql_log(ql_log_info, base_vha, 0x0198,
6493                         "Unable to initialize lun_qpair_map btree\n");
6494                 return -EIO;
6495         }
6496         h = &tgt->qphints[0];
6497         h->qpair = ha->base_qpair;
6498         INIT_LIST_HEAD(&h->hint_elem);
6499         h->cpuid = ha->base_qpair->cpuid;
6500         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6501
6502         for (i = 0; i < ha->max_qpairs; i++) {
6503                 unsigned long flags;
6504
6505                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6506                 h = &tgt->qphints[i + 1];
6507                 INIT_LIST_HEAD(&h->hint_elem);
6508                 if (qpair) {
6509                         h->qpair = qpair;
6510                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6511                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6512                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6513                         h->cpuid = qpair->cpuid;
6514                 }
6515         }
6516
6517         tgt->ha = ha;
6518         tgt->vha = base_vha;
6519         init_waitqueue_head(&tgt->waitQ);
6520         INIT_LIST_HEAD(&tgt->del_sess_list);
6521         spin_lock_init(&tgt->sess_work_lock);
6522         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6523         INIT_LIST_HEAD(&tgt->sess_works_list);
6524         atomic_set(&tgt->tgt_global_resets_count, 0);
6525
6526         base_vha->vha_tgt.qla_tgt = tgt;
6527
6528         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6529                 "qla_target(%d): using 64 Bit PCI addressing",
6530                 base_vha->vp_idx);
6531         /* 3 is reserved */
6532         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6533
6534         mutex_lock(&qla_tgt_mutex);
6535         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6536         mutex_unlock(&qla_tgt_mutex);
6537
6538         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6539                 ha->tgt.tgt_ops->add_target(base_vha);
6540
6541         return 0;
6542 }
6543
6544 /* Must be called under tgt_host_action_mutex */
6545 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6546 {
6547         if (!vha->vha_tgt.qla_tgt)
6548                 return 0;
6549
6550         if (vha->fc_vport) {
6551                 qlt_release(vha->vha_tgt.qla_tgt);
6552                 return 0;
6553         }
6554
6555         /* free left over qfull cmds */
6556         qlt_init_term_exchange(vha);
6557
6558         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6559             vha->host_no, ha);
6560         qlt_release(vha->vha_tgt.qla_tgt);
6561
6562         return 0;
6563 }
6564
6565 void qlt_remove_target_resources(struct qla_hw_data *ha)
6566 {
6567         struct scsi_qla_host *node;
6568         u32 key = 0;
6569
6570         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6571                 btree_remove32(&ha->tgt.host_map, key);
6572
6573         btree_destroy32(&ha->tgt.host_map);
6574 }
6575
6576 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6577         unsigned char *b)
6578 {
6579         int i;
6580
6581         pr_debug("qla2xxx HW vha->node_name: ");
6582         for (i = 0; i < WWN_SIZE; i++)
6583                 pr_debug("%02x ", vha->node_name[i]);
6584         pr_debug("\n");
6585         pr_debug("qla2xxx HW vha->port_name: ");
6586         for (i = 0; i < WWN_SIZE; i++)
6587                 pr_debug("%02x ", vha->port_name[i]);
6588         pr_debug("\n");
6589
6590         pr_debug("qla2xxx passed configfs WWPN: ");
6591         put_unaligned_be64(wwpn, b);
6592         for (i = 0; i < WWN_SIZE; i++)
6593                 pr_debug("%02x ", b[i]);
6594         pr_debug("\n");
6595 }
6596
6597 /**
6598  * qla_tgt_lport_register - register lport with external module
6599  *
6600  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6601  * @phys_wwpn: physical port WWPN
6602  * @npiv_wwpn: NPIV WWPN
6603  * @npiv_wwnn: NPIV WWNN
6604  * @callback:  lport initialization callback for tcm_qla2xxx code
6605  */
6606 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6607                        u64 npiv_wwpn, u64 npiv_wwnn,
6608                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6609 {
6610         struct qla_tgt *tgt;
6611         struct scsi_qla_host *vha;
6612         struct qla_hw_data *ha;
6613         struct Scsi_Host *host;
6614         unsigned long flags;
6615         int rc;
6616         u8 b[WWN_SIZE];
6617
6618         mutex_lock(&qla_tgt_mutex);
6619         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6620                 vha = tgt->vha;
6621                 ha = vha->hw;
6622
6623                 host = vha->host;
6624                 if (!host)
6625                         continue;
6626
6627                 if (!(host->hostt->supported_mode & MODE_TARGET))
6628                         continue;
6629
6630                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6631                         continue;
6632
6633                 spin_lock_irqsave(&ha->hardware_lock, flags);
6634                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6635                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6636                             host->host_no);
6637                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6638                         continue;
6639                 }
6640                 if (tgt->tgt_stop) {
6641                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6642                                  host->host_no);
6643                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6644                         continue;
6645                 }
6646                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6647
6648                 if (!scsi_host_get(host)) {
6649                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6650                             "Unable to scsi_host_get() for"
6651                             " qla2xxx scsi_host\n");
6652                         continue;
6653                 }
6654                 qlt_lport_dump(vha, phys_wwpn, b);
6655
6656                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6657                         scsi_host_put(host);
6658                         continue;
6659                 }
6660                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6661                 if (rc != 0)
6662                         scsi_host_put(host);
6663
6664                 mutex_unlock(&qla_tgt_mutex);
6665                 return rc;
6666         }
6667         mutex_unlock(&qla_tgt_mutex);
6668
6669         return -ENODEV;
6670 }
6671 EXPORT_SYMBOL(qlt_lport_register);
6672
6673 /**
6674  * qla_tgt_lport_deregister - Degister lport
6675  *
6676  * @vha:  Registered scsi_qla_host pointer
6677  */
6678 void qlt_lport_deregister(struct scsi_qla_host *vha)
6679 {
6680         struct qla_hw_data *ha = vha->hw;
6681         struct Scsi_Host *sh = vha->host;
6682         /*
6683          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6684          */
6685         vha->vha_tgt.target_lport_ptr = NULL;
6686         ha->tgt.tgt_ops = NULL;
6687         /*
6688          * Release the Scsi_Host reference for the underlying qla2xxx host
6689          */
6690         scsi_host_put(sh);
6691 }
6692 EXPORT_SYMBOL(qlt_lport_deregister);
6693
6694 /* Must be called under HW lock */
6695 void qlt_set_mode(struct scsi_qla_host *vha)
6696 {
6697         switch (vha->qlini_mode) {
6698         case QLA2XXX_INI_MODE_DISABLED:
6699         case QLA2XXX_INI_MODE_EXCLUSIVE:
6700                 vha->host->active_mode = MODE_TARGET;
6701                 break;
6702         case QLA2XXX_INI_MODE_ENABLED:
6703                 vha->host->active_mode = MODE_INITIATOR;
6704                 break;
6705         case QLA2XXX_INI_MODE_DUAL:
6706                 vha->host->active_mode = MODE_DUAL;
6707                 break;
6708         default:
6709                 break;
6710         }
6711 }
6712
6713 /* Must be called under HW lock */
6714 static void qlt_clear_mode(struct scsi_qla_host *vha)
6715 {
6716         switch (vha->qlini_mode) {
6717         case QLA2XXX_INI_MODE_DISABLED:
6718                 vha->host->active_mode = MODE_UNKNOWN;
6719                 break;
6720         case QLA2XXX_INI_MODE_EXCLUSIVE:
6721                 vha->host->active_mode = MODE_INITIATOR;
6722                 break;
6723         case QLA2XXX_INI_MODE_ENABLED:
6724         case QLA2XXX_INI_MODE_DUAL:
6725                 vha->host->active_mode = MODE_INITIATOR;
6726                 break;
6727         default:
6728                 break;
6729         }
6730 }
6731
6732 /*
6733  * qla_tgt_enable_vha - NO LOCK HELD
6734  *
6735  * host_reset, bring up w/ Target Mode Enabled
6736  */
6737 void
6738 qlt_enable_vha(struct scsi_qla_host *vha)
6739 {
6740         struct qla_hw_data *ha = vha->hw;
6741         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6742         unsigned long flags;
6743         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6744
6745         if (!tgt) {
6746                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6747                     "Unable to locate qla_tgt pointer from"
6748                     " struct qla_hw_data\n");
6749                 dump_stack();
6750                 return;
6751         }
6752         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6753                 return;
6754
6755         spin_lock_irqsave(&ha->hardware_lock, flags);
6756         tgt->tgt_stopped = 0;
6757         qlt_set_mode(vha);
6758         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6759
6760         mutex_lock(&ha->optrom_mutex);
6761         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6762             "%s.\n", __func__);
6763         if (vha->vp_idx) {
6764                 qla24xx_disable_vp(vha);
6765                 qla24xx_enable_vp(vha);
6766         } else {
6767                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6768                 qla2xxx_wake_dpc(base_vha);
6769                 qla2x00_wait_for_hba_online(base_vha);
6770         }
6771         mutex_unlock(&ha->optrom_mutex);
6772 }
6773 EXPORT_SYMBOL(qlt_enable_vha);
6774
6775 /*
6776  * qla_tgt_disable_vha - NO LOCK HELD
6777  *
6778  * Disable Target Mode and reset the adapter
6779  */
6780 static void qlt_disable_vha(struct scsi_qla_host *vha)
6781 {
6782         struct qla_hw_data *ha = vha->hw;
6783         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6784         unsigned long flags;
6785
6786         if (!tgt) {
6787                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6788                     "Unable to locate qla_tgt pointer from"
6789                     " struct qla_hw_data\n");
6790                 dump_stack();
6791                 return;
6792         }
6793
6794         spin_lock_irqsave(&ha->hardware_lock, flags);
6795         qlt_clear_mode(vha);
6796         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6797
6798         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6799         qla2xxx_wake_dpc(vha);
6800         qla2x00_wait_for_hba_online(vha);
6801 }
6802
6803 /*
6804  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6805  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6806  * members.
6807  */
6808 void
6809 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6810 {
6811         vha->vha_tgt.qla_tgt = NULL;
6812
6813         mutex_init(&vha->vha_tgt.tgt_mutex);
6814         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6815
6816         qlt_clear_mode(vha);
6817
6818         /*
6819          * NOTE: Currently the value is kept the same for <24xx and
6820          * >=24xx ISPs. If it is necessary to change it,
6821          * the check should be added for specific ISPs,
6822          * assigning the value appropriately.
6823          */
6824         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6825
6826         qlt_add_target(ha, vha);
6827 }
6828
6829 u8
6830 qlt_rff_id(struct scsi_qla_host *vha)
6831 {
6832         u8 fc4_feature = 0;
6833         /*
6834          * FC-4 Feature bit 0 indicates target functionality to the name server.
6835          */
6836         if (qla_tgt_mode_enabled(vha)) {
6837                 fc4_feature = BIT_0;
6838         } else if (qla_ini_mode_enabled(vha)) {
6839                 fc4_feature = BIT_1;
6840         } else if (qla_dual_mode_enabled(vha))
6841                 fc4_feature = BIT_0 | BIT_1;
6842
6843         return fc4_feature;
6844 }
6845
6846 /*
6847  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6848  * @ha: HA context
6849  *
6850  * Beginning of ATIO ring has initialization control block already built
6851  * by nvram config routine.
6852  *
6853  * Returns 0 on success.
6854  */
6855 void
6856 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6857 {
6858         struct qla_hw_data *ha = vha->hw;
6859         uint16_t cnt;
6860         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6861
6862         if (qla_ini_mode_enabled(vha))
6863                 return;
6864
6865         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6866                 pkt->u.raw.signature = ATIO_PROCESSED;
6867                 pkt++;
6868         }
6869
6870 }
6871
6872 /*
6873  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6874  * @ha: SCSI driver HA context
6875  */
6876 void
6877 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6878 {
6879         struct qla_hw_data *ha = vha->hw;
6880         struct atio_from_isp *pkt;
6881         int cnt, i;
6882
6883         if (!ha->flags.fw_started)
6884                 return;
6885
6886         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6887             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6888                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6889                 cnt = pkt->u.raw.entry_count;
6890
6891                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6892                         /*
6893                          * This packet is corrupted. The header + payload
6894                          * can not be trusted. There is no point in passing
6895                          * it further up.
6896                          */
6897                         ql_log(ql_log_warn, vha, 0xd03c,
6898                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6899                             pkt->u.isp24.fcp_hdr.s_id,
6900                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6901                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6902
6903                         adjust_corrupted_atio(pkt);
6904                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6905                             ha_locked, 0);
6906                 } else {
6907                         qlt_24xx_atio_pkt_all_vps(vha,
6908                             (struct atio_from_isp *)pkt, ha_locked);
6909                 }
6910
6911                 for (i = 0; i < cnt; i++) {
6912                         ha->tgt.atio_ring_index++;
6913                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6914                                 ha->tgt.atio_ring_index = 0;
6915                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6916                         } else
6917                                 ha->tgt.atio_ring_ptr++;
6918
6919                         pkt->u.raw.signature = ATIO_PROCESSED;
6920                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6921                 }
6922                 wmb();
6923         }
6924
6925         /* Adjust ring index */
6926         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6927 }
6928
6929 void
6930 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6931 {
6932         struct qla_hw_data *ha = vha->hw;
6933         struct qla_msix_entry *msix = &ha->msix_entries[2];
6934         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6935
6936         if (!QLA_TGT_MODE_ENABLED())
6937                 return;
6938
6939         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6940         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6941         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6942
6943         if (ha->flags.msix_enabled) {
6944                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6945                         if (IS_QLA2071(ha)) {
6946                                 /* 4 ports Baker: Enable Interrupt Handshake */
6947                                 icb->msix_atio = 0;
6948                                 icb->firmware_options_2 |= BIT_26;
6949                         } else {
6950                                 icb->msix_atio = cpu_to_le16(msix->entry);
6951                                 icb->firmware_options_2 &= ~BIT_26;
6952                         }
6953                         ql_dbg(ql_dbg_init, vha, 0xf072,
6954                             "Registering ICB vector 0x%x for atio que.\n",
6955                             msix->entry);
6956                 }
6957         } else {
6958                 /* INTx|MSI */
6959                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6960                         icb->msix_atio = 0;
6961                         icb->firmware_options_2 |= BIT_26;
6962                         ql_dbg(ql_dbg_init, vha, 0xf072,
6963                             "%s: Use INTx for ATIOQ.\n", __func__);
6964                 }
6965         }
6966 }
6967
6968 void
6969 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6970 {
6971         struct qla_hw_data *ha = vha->hw;
6972         u32 tmp;
6973
6974         if (!QLA_TGT_MODE_ENABLED())
6975                 return;
6976
6977         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6978                 if (!ha->tgt.saved_set) {
6979                         /* We save only once */
6980                         ha->tgt.saved_exchange_count = nv->exchange_count;
6981                         ha->tgt.saved_firmware_options_1 =
6982                             nv->firmware_options_1;
6983                         ha->tgt.saved_firmware_options_2 =
6984                             nv->firmware_options_2;
6985                         ha->tgt.saved_firmware_options_3 =
6986                             nv->firmware_options_3;
6987                         ha->tgt.saved_set = 1;
6988                 }
6989
6990                 if (qla_tgt_mode_enabled(vha))
6991                         nv->exchange_count = cpu_to_le16(0xFFFF);
6992                 else                    /* dual */
6993                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6994
6995                 /* Enable target mode */
6996                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6997
6998                 /* Disable ini mode, if requested */
6999                 if (qla_tgt_mode_enabled(vha))
7000                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7001
7002                 /* Disable Full Login after LIP */
7003                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7004                 /* Enable initial LIP */
7005                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7006                 if (ql2xtgt_tape_enable)
7007                         /* Enable FC Tape support */
7008                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7009                 else
7010                         /* Disable FC Tape support */
7011                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7012
7013                 /* Disable Full Login after LIP */
7014                 nv->host_p &= cpu_to_le32(~BIT_10);
7015
7016                 /*
7017                  * clear BIT 15 explicitly as we have seen at least
7018                  * a couple of instances where this was set and this
7019                  * was causing the firmware to not be initialized.
7020                  */
7021                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7022                 /* Enable target PRLI control */
7023                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7024
7025                 if (IS_QLA25XX(ha)) {
7026                         /* Change Loop-prefer to Pt-Pt */
7027                         tmp = ~(BIT_4|BIT_5|BIT_6);
7028                         nv->firmware_options_2 &= cpu_to_le32(tmp);
7029                         tmp = P2P << 4;
7030                         nv->firmware_options_2 |= cpu_to_le32(tmp);
7031                 }
7032         } else {
7033                 if (ha->tgt.saved_set) {
7034                         nv->exchange_count = ha->tgt.saved_exchange_count;
7035                         nv->firmware_options_1 =
7036                             ha->tgt.saved_firmware_options_1;
7037                         nv->firmware_options_2 =
7038                             ha->tgt.saved_firmware_options_2;
7039                         nv->firmware_options_3 =
7040                             ha->tgt.saved_firmware_options_3;
7041                 }
7042                 return;
7043         }
7044
7045         if (ha->base_qpair->enable_class_2) {
7046                 if (vha->flags.init_done)
7047                         fc_host_supported_classes(vha->host) =
7048                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7049
7050                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7051         } else {
7052                 if (vha->flags.init_done)
7053                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7054
7055                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7056         }
7057 }
7058
7059 void
7060 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
7061         struct init_cb_24xx *icb)
7062 {
7063         struct qla_hw_data *ha = vha->hw;
7064
7065         if (!QLA_TGT_MODE_ENABLED())
7066                 return;
7067
7068         if (ha->tgt.node_name_set) {
7069                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7070                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7071         }
7072 }
7073
7074 void
7075 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
7076 {
7077         struct qla_hw_data *ha = vha->hw;
7078         u32 tmp;
7079
7080         if (!QLA_TGT_MODE_ENABLED())
7081                 return;
7082
7083         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7084                 if (!ha->tgt.saved_set) {
7085                         /* We save only once */
7086                         ha->tgt.saved_exchange_count = nv->exchange_count;
7087                         ha->tgt.saved_firmware_options_1 =
7088                             nv->firmware_options_1;
7089                         ha->tgt.saved_firmware_options_2 =
7090                             nv->firmware_options_2;
7091                         ha->tgt.saved_firmware_options_3 =
7092                             nv->firmware_options_3;
7093                         ha->tgt.saved_set = 1;
7094                 }
7095
7096                 if (qla_tgt_mode_enabled(vha))
7097                         nv->exchange_count = cpu_to_le16(0xFFFF);
7098                 else                    /* dual */
7099                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7100
7101                 /* Enable target mode */
7102                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7103
7104                 /* Disable ini mode, if requested */
7105                 if (qla_tgt_mode_enabled(vha))
7106                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7107                 /* Disable Full Login after LIP */
7108                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7109                 /* Enable initial LIP */
7110                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7111                 /*
7112                  * clear BIT 15 explicitly as we have seen at
7113                  * least a couple of instances where this was set
7114                  * and this was causing the firmware to not be
7115                  * initialized.
7116                  */
7117                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7118                 if (ql2xtgt_tape_enable)
7119                         /* Enable FC tape support */
7120                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7121                 else
7122                         /* Disable FC tape support */
7123                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7124
7125                 /* Disable Full Login after LIP */
7126                 nv->host_p &= cpu_to_le32(~BIT_10);
7127                 /* Enable target PRLI control */
7128                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7129
7130                 /* Change Loop-prefer to Pt-Pt */
7131                 tmp = ~(BIT_4|BIT_5|BIT_6);
7132                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7133                 tmp = P2P << 4;
7134                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7135         } else {
7136                 if (ha->tgt.saved_set) {
7137                         nv->exchange_count = ha->tgt.saved_exchange_count;
7138                         nv->firmware_options_1 =
7139                             ha->tgt.saved_firmware_options_1;
7140                         nv->firmware_options_2 =
7141                             ha->tgt.saved_firmware_options_2;
7142                         nv->firmware_options_3 =
7143                             ha->tgt.saved_firmware_options_3;
7144                 }
7145                 return;
7146         }
7147
7148         if (ha->base_qpair->enable_class_2) {
7149                 if (vha->flags.init_done)
7150                         fc_host_supported_classes(vha->host) =
7151                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7152
7153                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7154         } else {
7155                 if (vha->flags.init_done)
7156                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7157
7158                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7159         }
7160 }
7161
7162 void
7163 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7164         struct init_cb_81xx *icb)
7165 {
7166         struct qla_hw_data *ha = vha->hw;
7167
7168         if (!QLA_TGT_MODE_ENABLED())
7169                 return;
7170
7171         if (ha->tgt.node_name_set) {
7172                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7173                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7174         }
7175 }
7176
7177 void
7178 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7179 {
7180         if (!QLA_TGT_MODE_ENABLED())
7181                 return;
7182
7183         ha->msix_count += 1; /* For ATIO Q */
7184 }
7185
7186
7187 void
7188 qlt_modify_vp_config(struct scsi_qla_host *vha,
7189         struct vp_config_entry_24xx *vpmod)
7190 {
7191         /* enable target mode.  Bit5 = 1 => disable */
7192         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7193                 vpmod->options_idx1 &= ~BIT_5;
7194
7195         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7196         if (qla_tgt_mode_enabled(vha))
7197                 vpmod->options_idx1 &= ~BIT_4;
7198 }
7199
7200 void
7201 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7202 {
7203         int rc;
7204
7205         if (!QLA_TGT_MODE_ENABLED())
7206                 return;
7207
7208         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
7209                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7210                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7211         } else {
7212                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7213                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7214         }
7215
7216         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7217         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7218
7219         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7220         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7221             qlt_unknown_atio_work_fn);
7222
7223         qlt_clear_mode(base_vha);
7224
7225         rc = btree_init32(&ha->tgt.host_map);
7226         if (rc)
7227                 ql_log(ql_log_info, base_vha, 0xd03d,
7228                     "Unable to initialize ha->host_map btree\n");
7229
7230         qlt_update_vp_map(base_vha, SET_VP_IDX);
7231 }
7232
7233 irqreturn_t
7234 qla83xx_msix_atio_q(int irq, void *dev_id)
7235 {
7236         struct rsp_que *rsp;
7237         scsi_qla_host_t *vha;
7238         struct qla_hw_data *ha;
7239         unsigned long flags;
7240
7241         rsp = (struct rsp_que *) dev_id;
7242         ha = rsp->hw;
7243         vha = pci_get_drvdata(ha->pdev);
7244
7245         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7246
7247         qlt_24xx_process_atio_queue(vha, 0);
7248
7249         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7250
7251         return IRQ_HANDLED;
7252 }
7253
7254 static void
7255 qlt_handle_abts_recv_work(struct work_struct *work)
7256 {
7257         struct qla_tgt_sess_op *op = container_of(work,
7258                 struct qla_tgt_sess_op, work);
7259         scsi_qla_host_t *vha = op->vha;
7260         struct qla_hw_data *ha = vha->hw;
7261         unsigned long flags;
7262
7263         if (qla2x00_reset_active(vha) ||
7264             (op->chip_reset != ha->base_qpair->chip_reset))
7265                 return;
7266
7267         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7268         qlt_24xx_process_atio_queue(vha, 0);
7269         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7270
7271         spin_lock_irqsave(&ha->hardware_lock, flags);
7272         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7273         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7274
7275         kfree(op);
7276 }
7277
7278 void
7279 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7280     response_t *pkt)
7281 {
7282         struct qla_tgt_sess_op *op;
7283
7284         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7285
7286         if (!op) {
7287                 /* do not reach for ATIO queue here.  This is best effort err
7288                  * recovery at this point.
7289                  */
7290                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7291                 return;
7292         }
7293
7294         memcpy(&op->atio, pkt, sizeof(*pkt));
7295         op->vha = vha;
7296         op->chip_reset = vha->hw->base_qpair->chip_reset;
7297         op->rsp = rsp;
7298         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7299         queue_work(qla_tgt_wq, &op->work);
7300         return;
7301 }
7302
7303 int
7304 qlt_mem_alloc(struct qla_hw_data *ha)
7305 {
7306         if (!QLA_TGT_MODE_ENABLED())
7307                 return 0;
7308
7309         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7310                                      sizeof(struct qla_tgt_vp_map),
7311                                      GFP_KERNEL);
7312         if (!ha->tgt.tgt_vp_map)
7313                 return -ENOMEM;
7314
7315         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7316             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7317             &ha->tgt.atio_dma, GFP_KERNEL);
7318         if (!ha->tgt.atio_ring) {
7319                 kfree(ha->tgt.tgt_vp_map);
7320                 return -ENOMEM;
7321         }
7322         return 0;
7323 }
7324
7325 void
7326 qlt_mem_free(struct qla_hw_data *ha)
7327 {
7328         if (!QLA_TGT_MODE_ENABLED())
7329                 return;
7330
7331         if (ha->tgt.atio_ring) {
7332                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7333                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7334                     ha->tgt.atio_dma);
7335         }
7336         kfree(ha->tgt.tgt_vp_map);
7337 }
7338
7339 /* vport_slock to be held by the caller */
7340 void
7341 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7342 {
7343         void *slot;
7344         u32 key;
7345         int rc;
7346
7347         if (!QLA_TGT_MODE_ENABLED())
7348                 return;
7349
7350         key = vha->d_id.b24;
7351
7352         switch (cmd) {
7353         case SET_VP_IDX:
7354                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7355                 break;
7356         case SET_AL_PA:
7357                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7358                 if (!slot) {
7359                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7360                             "Save vha in host_map %p %06x\n", vha, key);
7361                         rc = btree_insert32(&vha->hw->tgt.host_map,
7362                                 key, vha, GFP_ATOMIC);
7363                         if (rc)
7364                                 ql_log(ql_log_info, vha, 0xd03e,
7365                                     "Unable to insert s_id into host_map: %06x\n",
7366                                     key);
7367                         return;
7368                 }
7369                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7370                     "replace existing vha in host_map %p %06x\n", vha, key);
7371                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7372                 break;
7373         case RESET_VP_IDX:
7374                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7375                 break;
7376         case RESET_AL_PA:
7377                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7378                    "clear vha in host_map %p %06x\n", vha, key);
7379                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7380                 if (slot)
7381                         btree_remove32(&vha->hw->tgt.host_map, key);
7382                 vha->d_id.b24 = 0;
7383                 break;
7384         }
7385 }
7386
7387 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7388 {
7389
7390         if (!vha->d_id.b24) {
7391                 vha->d_id = id;
7392                 qlt_update_vp_map(vha, SET_AL_PA);
7393         } else if (vha->d_id.b24 != id.b24) {
7394                 qlt_update_vp_map(vha, RESET_AL_PA);
7395                 vha->d_id = id;
7396                 qlt_update_vp_map(vha, SET_AL_PA);
7397         }
7398 }
7399
7400 static int __init qlt_parse_ini_mode(void)
7401 {
7402         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7403                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7404         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7405                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7406         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7407                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7408         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7409                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7410         else
7411                 return false;
7412
7413         return true;
7414 }
7415
7416 int __init qlt_init(void)
7417 {
7418         int ret;
7419
7420         if (!qlt_parse_ini_mode()) {
7421                 ql_log(ql_log_fatal, NULL, 0xe06b,
7422                     "qlt_parse_ini_mode() failed\n");
7423                 return -EINVAL;
7424         }
7425
7426         if (!QLA_TGT_MODE_ENABLED())
7427                 return 0;
7428
7429         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7430             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7431             qla_tgt_mgmt_cmd), 0, NULL);
7432         if (!qla_tgt_mgmt_cmd_cachep) {
7433                 ql_log(ql_log_fatal, NULL, 0xd04b,
7434                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7435                 return -ENOMEM;
7436         }
7437
7438         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7439             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7440             0, NULL);
7441
7442         if (!qla_tgt_plogi_cachep) {
7443                 ql_log(ql_log_fatal, NULL, 0xe06d,
7444                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7445                 ret = -ENOMEM;
7446                 goto out_mgmt_cmd_cachep;
7447         }
7448
7449         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7450             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7451         if (!qla_tgt_mgmt_cmd_mempool) {
7452                 ql_log(ql_log_fatal, NULL, 0xe06e,
7453                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7454                 ret = -ENOMEM;
7455                 goto out_plogi_cachep;
7456         }
7457
7458         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7459         if (!qla_tgt_wq) {
7460                 ql_log(ql_log_fatal, NULL, 0xe06f,
7461                     "alloc_workqueue for qla_tgt_wq failed\n");
7462                 ret = -ENOMEM;
7463                 goto out_cmd_mempool;
7464         }
7465         /*
7466          * Return 1 to signal that initiator-mode is being disabled
7467          */
7468         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7469
7470 out_cmd_mempool:
7471         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7472 out_plogi_cachep:
7473         kmem_cache_destroy(qla_tgt_plogi_cachep);
7474 out_mgmt_cmd_cachep:
7475         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7476         return ret;
7477 }
7478
7479 void qlt_exit(void)
7480 {
7481         if (!QLA_TGT_MODE_ENABLED())
7482                 return;
7483
7484         destroy_workqueue(qla_tgt_wq);
7485         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7486         kmem_cache_destroy(qla_tgt_plogi_cachep);
7487         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7488 }