drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30 #include <target/target_core_base.h>
  31 #include <target/target_core_fabric.h>
  32
  33 #include "qla_def.h"
  34 #include "qla_target.h"
  35
  36 static int ql2xtgt_tape_enable;
  37 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  38 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  39                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  40
  41 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  42 module_param(qlini_mode, charp, S_IRUGO);
  43 MODULE_PARM_DESC(qlini_mode,
  44         "Determines when initiator mode will be enabled. Possible values: "
  45         "\"exclusive\" - initiator mode will be enabled on load, "
  46         "disabled on enabling target mode and then on disabling target mode "
  47         "enabled back; "
  48         "\"disabled\" - initiator mode will never be enabled; "
  49         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  50         "when ready "
  51         "\"enabled\" (default) - initiator mode will always stay enabled.");
  52
  53 static int ql_dm_tgt_ex_pct = 0;
  54 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  55 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  56         "For Dual Mode (qlini_mode=dual), this parameter determines "
  57         "the percentage of exchanges/cmds FW will allocate resources "
  58         "for Target mode.");
  59
  60 int ql2xuctrlirq = 1;
  61 module_param(ql2xuctrlirq, int, 0644);
  62 MODULE_PARM_DESC(ql2xuctrlirq,
  63     "User to control IRQ placement via smp_affinity."
  64     "Valid with qlini_mode=disabled."
  65     "1(default): enable");
  66
  67 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  68
  69 static int qla_sam_status = SAM_STAT_BUSY;
  70 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  71
  72 /*
  73  * From scsi/fc/fc_fcp.h
  74  */
  75 enum fcp_resp_rsp_codes {
  76         FCP_TMF_CMPL = 0,
  77         FCP_DATA_LEN_INVALID = 1,
  78         FCP_CMND_FIELDS_INVALID = 2,
  79         FCP_DATA_PARAM_MISMATCH = 3,
  80         FCP_TMF_REJECTED = 4,
  81         FCP_TMF_FAILED = 5,
  82         FCP_TMF_INVALID_LUN = 9,
  83 };
  84
  85 /*
  86  * fc_pri_ta from scsi/fc/fc_fcp.h
  87  */
  88 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  89 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  90 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  91 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  92 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  93 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  94 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  95
  96 /*
  97  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  98  * must be called under HW lock and could unlock/lock it inside.
  99  * It isn't an issue, since in the current implementation on the time when
 100  * those functions are called:
 101  *
 102  *   - Either context is IRQ and only IRQ handler can modify HW data,
 103  *     including rings related fields,
 104  *
 105  *   - Or access to target mode variables from struct qla_tgt doesn't
 106  *     cross those functions boundaries, except tgt_stop, which
 107  *     additionally protected by irq_cmd_count.
 108  */
 109 /* Predefs for callbacks handed to qla2xxx LLD */
 110 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 111         struct atio_from_isp *pkt, uint8_t);
 112 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 113         response_t *pkt);
 114 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 115         int fn, void *iocb, int flags);
 116 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 117         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 118 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 119         struct atio_from_isp *atio, uint16_t status, int qfull);
 120 static void qlt_disable_vha(struct scsi_qla_host *vha);
 121 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 122 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 123         struct imm_ntfy_from_isp *ntfy,
 124         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 125         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 126 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 127         struct imm_ntfy_from_isp *imm, int ha_locked);
 128 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 129         fc_port_t *fcport, bool local);
 130 void qlt_unreg_sess(struct fc_port *sess);
 131 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 132         struct abts_recv_from_24xx *);
 133 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 134     uint16_t);
 135 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 136 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 137
 138 /*
 139  * Global Variables
 140  */
 141 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 142 struct kmem_cache *qla_tgt_plogi_cachep;
 143 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 144 static struct workqueue_struct *qla_tgt_wq;
 145 static DEFINE_MUTEX(qla_tgt_mutex);
 146 static LIST_HEAD(qla_tgt_glist);
 147
 148 static const char *prot_op_str(u32 prot_op)
 149 {
 150         switch (prot_op) {
 151         case TARGET_PROT_NORMAL:        return "NORMAL";
 152         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 153         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 154         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 155         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 156         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 157         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 158         default:                        return "UNKNOWN";
 159         }
 160 }
 161
 162 /* This API intentionally takes dest as a parameter, rather than returning
 163  * int value to avoid caller forgetting to issue wmb() after the store */
 164 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 165 {
 166         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 167         *dest = atomic_inc_return(&base_vha->generation_tick);
 168         /* memory barrier */
 169         wmb();
 170 }
 171
 172 /* Might release hw lock, then reaquire!! */
 173 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 174 {
 175         /* Send marker if required */
 176         if (unlikely(vha->marker_needed != 0)) {
 177                 int rc = qla2x00_issue_marker(vha, vha_locked);
 178
 179                 if (rc != QLA_SUCCESS) {
 180                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 181                             "qla_target(%d): issue_marker() failed\n",
 182                             vha->vp_idx);
 183                 }
 184                 return rc;
 185         }
 186         return QLA_SUCCESS;
 187 }
 188
 189 static inline
 190 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 191                                             be_id_t d_id)
 192 {
 193         struct scsi_qla_host *host;
 194         uint32_t key;
 195
 196         if (vha->d_id.b.area == d_id.area &&
 197             vha->d_id.b.domain == d_id.domain &&
 198             vha->d_id.b.al_pa == d_id.al_pa)
 199                 return vha;
 200
 201         key = be_to_port_id(d_id).b24;
 202
 203         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 204         if (!host)
 205                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 206                     "Unable to find host %06x\n", key);
 207
 208         return host;
 209 }
 210
 211 static inline
 212 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 213         uint16_t vp_idx)
 214 {
 215         struct qla_hw_data *ha = vha->hw;
 216
 217         if (vha->vp_idx == vp_idx)
 218                 return vha;
 219
 220         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 221         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 222                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 223
 224         return NULL;
 225 }
 226
 227 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 228 {
 229         unsigned long flags;
 230
 231         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 232
 233         vha->hw->tgt.num_pend_cmds++;
 234         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 235                 vha->qla_stats.stat_max_pend_cmds =
 236                         vha->hw->tgt.num_pend_cmds;
 237         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 238 }
 239 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 240 {
 241         unsigned long flags;
 242
 243         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 244         vha->hw->tgt.num_pend_cmds--;
 245         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 246 }
 247
 248
 249 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 250         struct atio_from_isp *atio, uint8_t ha_locked)
 251 {
 252         struct qla_tgt_sess_op *u;
 253         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 254         unsigned long flags;
 255
 256         if (tgt->tgt_stop) {
 257                 ql_dbg(ql_dbg_async, vha, 0x502c,
 258                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 259                     vha->vp_idx);
 260                 goto out_term;
 261         }
 262
 263         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 264         if (u == NULL)
 265                 goto out_term;
 266
 267         u->vha = vha;
 268         memcpy(&u->atio, atio, sizeof(*atio));
 269         INIT_LIST_HEAD(&u->cmd_list);
 270
 271         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 272         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 273         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 274
 275         schedule_delayed_work(&vha->unknown_atio_work, 1);
 276
 277 out:
 278         return;
 279
 280 out_term:
 281         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 282         goto out;
 283 }
 284
 285 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 286         uint8_t ha_locked)
 287 {
 288         struct qla_tgt_sess_op *u, *t;
 289         scsi_qla_host_t *host;
 290         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 291         unsigned long flags;
 292         uint8_t queued = 0;
 293
 294         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 295                 if (u->aborted) {
 296                         ql_dbg(ql_dbg_async, vha, 0x502e,
 297                             "Freeing unknown %s %p, because of Abort\n",
 298                             "ATIO_TYPE7", u);
 299                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 300                             &u->atio, ha_locked, 0);
 301                         goto abort;
 302                 }
 303
 304                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 305                 if (host != NULL) {
 306                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 307                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 308                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 309                 } else if (tgt->tgt_stop) {
 310                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 311                             "Freeing unknown %s %p, because tgt is being stopped\n",
 312                             "ATIO_TYPE7", u);
 313                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 314                             &u->atio, ha_locked, 0);
 315                 } else {
 316                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 317                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 318                         if (!queued) {
 319                                 queued = 1;
 320                                 schedule_delayed_work(&vha->unknown_atio_work,
 321                                     1);
 322                         }
 323                         continue;
 324                 }
 325
 326 abort:
 327                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 328                 list_del(&u->cmd_list);
 329                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 330                 kfree(u);
 331         }
 332 }
 333
 334 void qlt_unknown_atio_work_fn(struct work_struct *work)
 335 {
 336         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 337             struct scsi_qla_host, unknown_atio_work);
 338
 339         qlt_try_to_dequeue_unknown_atios(vha, 0);
 340 }
 341
 342 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 343         struct atio_from_isp *atio, uint8_t ha_locked)
 344 {
 345         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 346                 "%s: qla_target(%d): type %x ox_id %04x\n",
 347                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 348                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 349
 350         switch (atio->u.raw.entry_type) {
 351         case ATIO_TYPE7:
 352         {
 353                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 354                     atio->u.isp24.fcp_hdr.d_id);
 355                 if (unlikely(NULL == host)) {
 356                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 357                             "qla_target(%d): Received ATIO_TYPE7 "
 358                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 359                             atio->u.isp24.fcp_hdr.d_id.domain,
 360                             atio->u.isp24.fcp_hdr.d_id.area,
 361                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 362
 363
 364                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 365                         break;
 366                 }
 367                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 368                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 369
 370                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 371                 break;
 372         }
 373
 374         case IMMED_NOTIFY_TYPE:
 375         {
 376                 struct scsi_qla_host *host = vha;
 377                 struct imm_ntfy_from_isp *entry =
 378                     (struct imm_ntfy_from_isp *)atio;
 379
 380                 qlt_issue_marker(vha, ha_locked);
 381
 382                 if ((entry->u.isp24.vp_index != 0xFF) &&
 383                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 384                         host = qlt_find_host_by_vp_idx(vha,
 385                             entry->u.isp24.vp_index);
 386                         if (unlikely(!host)) {
 387                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 388                                     "qla_target(%d): Received "
 389                                     "ATIO (IMMED_NOTIFY_TYPE) "
 390                                     "with unknown vp_index %d\n",
 391                                     vha->vp_idx, entry->u.isp24.vp_index);
 392                                 break;
 393                         }
 394                 }
 395                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 396                 break;
 397         }
 398
 399         case VP_RPT_ID_IOCB_TYPE:
 400                 qla24xx_report_id_acquisition(vha,
 401                         (struct vp_rpt_id_entry_24xx *)atio);
 402                 break;
 403
 404         case ABTS_RECV_24XX:
 405         {
 406                 struct abts_recv_from_24xx *entry =
 407                         (struct abts_recv_from_24xx *)atio;
 408                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 409                         entry->vp_index);
 410                 unsigned long flags;
 411
 412                 if (unlikely(!host)) {
 413                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 414                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 415                             "received, with unknown vp_index %d\n",
 416                             vha->vp_idx, entry->vp_index);
 417                         break;
 418                 }
 419                 if (!ha_locked)
 420                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 421                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 422                 if (!ha_locked)
 423                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 424                 break;
 425         }
 426
 427         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 428
 429         default:
 430                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 431                     "qla_target(%d): Received unknown ATIO atio "
 432                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 433                 break;
 434         }
 435
 436         return false;
 437 }
 438
 439 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 440         struct rsp_que *rsp, response_t *pkt)
 441 {
 442         switch (pkt->entry_type) {
 443         case CTIO_CRC2:
 444                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 445                         "qla_target(%d):%s: CRC2 Response pkt\n",
 446                         vha->vp_idx, __func__);
 447                 /* fall through */
 448         case CTIO_TYPE7:
 449         {
 450                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 451                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 452                     entry->vp_index);
 453                 if (unlikely(!host)) {
 454                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 455                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 456                             "received, with unknown vp_index %d\n",
 457                             vha->vp_idx, entry->vp_index);
 458                         break;
 459                 }
 460                 qlt_response_pkt(host, rsp, pkt);
 461                 break;
 462         }
 463
 464         case IMMED_NOTIFY_TYPE:
 465         {
 466                 struct scsi_qla_host *host;
 467                 struct imm_ntfy_from_isp *entry =
 468                     (struct imm_ntfy_from_isp *)pkt;
 469
 470                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 471                 if (unlikely(!host)) {
 472                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 473                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 474                             "received, with unknown vp_index %d\n",
 475                             vha->vp_idx, entry->u.isp24.vp_index);
 476                         break;
 477                 }
 478                 qlt_response_pkt(host, rsp, pkt);
 479                 break;
 480         }
 481
 482         case NOTIFY_ACK_TYPE:
 483         {
 484                 struct scsi_qla_host *host = vha;
 485                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 486
 487                 if (0xFF != entry->u.isp24.vp_index) {
 488                         host = qlt_find_host_by_vp_idx(vha,
 489                             entry->u.isp24.vp_index);
 490                         if (unlikely(!host)) {
 491                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 492                                     "qla_target(%d): Response "
 493                                     "pkt (NOTIFY_ACK_TYPE) "
 494                                     "received, with unknown "
 495                                     "vp_index %d\n", vha->vp_idx,
 496                                     entry->u.isp24.vp_index);
 497                                 break;
 498                         }
 499                 }
 500                 qlt_response_pkt(host, rsp, pkt);
 501                 break;
 502         }
 503
 504         case ABTS_RECV_24XX:
 505         {
 506                 struct abts_recv_from_24xx *entry =
 507                     (struct abts_recv_from_24xx *)pkt;
 508                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 509                     entry->vp_index);
 510                 if (unlikely(!host)) {
 511                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 512                             "qla_target(%d): Response pkt "
 513                             "(ABTS_RECV_24XX) received, with unknown "
 514                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 515                         break;
 516                 }
 517                 qlt_response_pkt(host, rsp, pkt);
 518                 break;
 519         }
 520
 521         case ABTS_RESP_24XX:
 522         {
 523                 struct abts_resp_to_24xx *entry =
 524                     (struct abts_resp_to_24xx *)pkt;
 525                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 526                     entry->vp_index);
 527                 if (unlikely(!host)) {
 528                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 529                             "qla_target(%d): Response pkt "
 530                             "(ABTS_RECV_24XX) received, with unknown "
 531                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 532                         break;
 533                 }
 534                 qlt_response_pkt(host, rsp, pkt);
 535                 break;
 536         }
 537         default:
 538                 qlt_response_pkt(vha, rsp, pkt);
 539                 break;
 540         }
 541
 542 }
 543
 544 /*
 545  * All qlt_plogi_ack_t operations are protected by hardware_lock
 546  */
 547 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 548         struct imm_ntfy_from_isp *ntfy, int type)
 549 {
 550         struct qla_work_evt *e;
 551
 552         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 553         if (!e)
 554                 return QLA_FUNCTION_FAILED;
 555
 556         e->u.nack.fcport = fcport;
 557         e->u.nack.type = type;
 558         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 559         return qla2x00_post_work(vha, e);
 560 }
 561
 562 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 563 {
 564         struct scsi_qla_host *vha = sp->vha;
 565         unsigned long flags;
 566
 567         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 568             "Async done-%s res %x %8phC  type %d\n",
 569             sp->name, res, sp->fcport->port_name, sp->type);
 570
 571         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 572         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 573         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 574
 575         switch (sp->type) {
 576         case SRB_NACK_PLOGI:
 577                 sp->fcport->login_gen++;
 578                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 579                 sp->fcport->logout_on_delete = 1;
 580                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 581                 sp->fcport->send_els_logo = 0;
 582                 break;
 583
 584         case SRB_NACK_PRLI:
 585                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 586                 sp->fcport->deleted = 0;
 587                 sp->fcport->send_els_logo = 0;
 588
 589                 if (!sp->fcport->login_succ &&
 590                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 591                         sp->fcport->login_succ = 1;
 592
 593                         vha->fcport_count++;
 594                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 595                         qla24xx_sched_upd_fcport(sp->fcport);
 596                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 597                 } else {
 598                         sp->fcport->login_retry = 0;
 599                         qla2x00_set_fcport_disc_state(sp->fcport,
 600                             DSC_LOGIN_COMPLETE);
 601                         sp->fcport->deleted = 0;
 602                         sp->fcport->logout_on_delete = 1;
 603                 }
 604                 break;
 605
 606         case SRB_NACK_LOGO:
 607                 sp->fcport->login_gen++;
 608                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 609                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 610                 break;
 611         }
 612         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 613
 614         sp->free(sp);
 615 }
 616
 617 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 618         struct imm_ntfy_from_isp *ntfy, int type)
 619 {
 620         int rval = QLA_FUNCTION_FAILED;
 621         srb_t *sp;
 622         char *c = NULL;
 623
 624         fcport->flags |= FCF_ASYNC_SENT;
 625         switch (type) {
 626         case SRB_NACK_PLOGI:
 627                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 628                 c = "PLOGI";
 629                 break;
 630         case SRB_NACK_PRLI:
 631                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 632                 fcport->deleted = 0;
 633                 c = "PRLI";
 634                 break;
 635         case SRB_NACK_LOGO:
 636                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 637                 c = "LOGO";
 638                 break;
 639         }
 640
 641         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 642         if (!sp)
 643                 goto done;
 644
 645         sp->type = type;
 646         sp->name = "nack";
 647
 648         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 649         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 650
 651         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 652         sp->done = qla2x00_async_nack_sp_done;
 653
 654         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 655             "Async-%s %8phC hndl %x %s\n",
 656             sp->name, fcport->port_name, sp->handle, c);
 657
 658         rval = qla2x00_start_sp(sp);
 659         if (rval != QLA_SUCCESS)
 660                 goto done_free_sp;
 661
 662         return rval;
 663
 664 done_free_sp:
 665         sp->free(sp);
 666 done:
 667         fcport->flags &= ~FCF_ASYNC_SENT;
 668         return rval;
 669 }
 670
 671 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 672 {
 673         fc_port_t *t;
 674
 675         switch (e->u.nack.type) {
 676         case SRB_NACK_PRLI:
 677                 t = e->u.nack.fcport;
 678                 flush_work(&t->del_work);
 679                 flush_work(&t->free_work);
 680                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 681                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 682                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 683                 if (t) {
 684                         ql_log(ql_log_info, vha, 0xd034,
 685                             "%s create sess success %p", __func__, t);
 686                         /* create sess has an extra kref */
 687                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 688                 }
 689                 break;
 690         }
 691         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 692             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 693 }
 694
 695 void qla24xx_delete_sess_fn(struct work_struct *work)
 696 {
 697         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 698         struct qla_hw_data *ha = fcport->vha->hw;
 699
 700         if (fcport->se_sess) {
 701                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 702                 ha->tgt.tgt_ops->put_sess(fcport);
 703         } else {
 704                 qlt_unreg_sess(fcport);
 705         }
 706 }
 707
 708 /*
 709  * Called from qla2x00_reg_remote_port()
 710  */
 711 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 712 {
 713         struct qla_hw_data *ha = vha->hw;
 714         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 715         struct fc_port *sess = fcport;
 716         unsigned long flags;
 717
 718         if (!vha->hw->tgt.tgt_ops)
 719                 return;
 720
 721         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 722         if (tgt->tgt_stop) {
 723                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 724                 return;
 725         }
 726
 727         if (fcport->disc_state == DSC_DELETE_PEND) {
 728                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 729                 return;
 730         }
 731
 732         if (!sess->se_sess) {
 733                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 734
 735                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 736                 sess = qlt_create_sess(vha, fcport, false);
 737                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 738
 739                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 740         } else {
 741                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 742                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 743                         return;
 744                 }
 745
 746                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 747                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 748                             "%s: kref_get fail sess %8phC \n",
 749                             __func__, sess->port_name);
 750                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 751                         return;
 752                 }
 753
 754                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 755                     "qla_target(%u): %ssession for port %8phC "
 756                     "(loop ID %d) reappeared\n", vha->vp_idx,
 757                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 758
 759                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 760                     "Reappeared sess %p\n", sess);
 761
 762                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 763                     fcport->loop_id,
 764                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 765         }
 766
 767         if (sess && sess->local) {
 768                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 769                     "qla_target(%u): local session for "
 770                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 771                     fcport->port_name, sess->loop_id);
 772                 sess->local = 0;
 773         }
 774         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 775
 776         ha->tgt.tgt_ops->put_sess(sess);
 777 }
 778
 779 /*
 780  * This is a zero-base ref-counting solution, since hardware_lock
 781  * guarantees that ref_count is not modified concurrently.
 782  * Upon successful return content of iocb is undefined
 783  */
 784 static struct qlt_plogi_ack_t *
 785 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 786                        struct imm_ntfy_from_isp *iocb)
 787 {
 788         struct qlt_plogi_ack_t *pla;
 789
 790         lockdep_assert_held(&vha->hw->hardware_lock);
 791
 792         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 793                 if (pla->id.b24 == id->b24) {
 794                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 795                             "%s %d %8phC Term INOT due to new INOT",
 796                             __func__, __LINE__,
 797                             pla->iocb.u.isp24.port_name);
 798                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 799                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 800                         return pla;
 801                 }
 802         }
 803
 804         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 805         if (!pla) {
 806                 ql_dbg(ql_dbg_async, vha, 0x5088,
 807                        "qla_target(%d): Allocation of plogi_ack failed\n",
 808                        vha->vp_idx);
 809                 return NULL;
 810         }
 811
 812         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 813         pla->id = *id;
 814         list_add_tail(&pla->list, &vha->plogi_ack_list);
 815
 816         return pla;
 817 }
 818
 819 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 820     struct qlt_plogi_ack_t *pla)
 821 {
 822         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 823         port_id_t port_id;
 824         uint16_t loop_id;
 825         fc_port_t *fcport = pla->fcport;
 826
 827         BUG_ON(!pla->ref_count);
 828         pla->ref_count--;
 829
 830         if (pla->ref_count)
 831                 return;
 832
 833         ql_dbg(ql_dbg_disc, vha, 0x5089,
 834             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 835             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 836             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 837             iocb->u.isp24.port_id[0],
 838             le16_to_cpu(iocb->u.isp24.nport_handle),
 839             iocb->u.isp24.exchange_address, iocb->ox_id);
 840
 841         port_id.b.domain = iocb->u.isp24.port_id[2];
 842         port_id.b.area   = iocb->u.isp24.port_id[1];
 843         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 844         port_id.b.rsvd_1 = 0;
 845
 846         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 847
 848         fcport->loop_id = loop_id;
 849         fcport->d_id = port_id;
 850         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 851                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 852         else
 853                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 854
 855         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 856                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 857                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 858                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 859                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 860         }
 861
 862         list_del(&pla->list);
 863         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 864 }
 865
 866 void
 867 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 868     struct fc_port *sess, enum qlt_plogi_link_t link)
 869 {
 870         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 871         /* Inc ref_count first because link might already be pointing at pla */
 872         pla->ref_count++;
 873
 874         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 875                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 876                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 877                 sess, link, sess->port_name,
 878                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 879                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 880                 pla->ref_count, pla, link);
 881
 882         if (link == QLT_PLOGI_LINK_CONFLICT) {
 883                 switch (sess->disc_state) {
 884                 case DSC_DELETED:
 885                 case DSC_DELETE_PEND:
 886                         pla->ref_count--;
 887                         return;
 888                 default:
 889                         break;
 890                 }
 891         }
 892
 893         if (sess->plogi_link[link])
 894                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 895
 896         if (link == QLT_PLOGI_LINK_SAME_WWN)
 897                 pla->fcport = sess;
 898
 899         sess->plogi_link[link] = pla;
 900 }
 901
 902 typedef struct {
 903         /* These fields must be initialized by the caller */
 904         port_id_t id;
 905         /*
 906          * number of cmds dropped while we were waiting for
 907          * initiator to ack LOGO initialize to 1 if LOGO is
 908          * triggered by a command, otherwise, to 0
 909          */
 910         int cmd_count;
 911
 912         /* These fields are used by callee */
 913         struct list_head list;
 914 } qlt_port_logo_t;
 915
 916 static void
 917 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 918 {
 919         qlt_port_logo_t *tmp;
 920         int res;
 921
 922         mutex_lock(&vha->vha_tgt.tgt_mutex);
 923
 924         list_for_each_entry(tmp, &vha->logo_list, list) {
 925                 if (tmp->id.b24 == logo->id.b24) {
 926                         tmp->cmd_count += logo->cmd_count;
 927                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 928                         return;
 929                 }
 930         }
 931
 932         list_add_tail(&logo->list, &vha->logo_list);
 933
 934         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 935
 936         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 937
 938         mutex_lock(&vha->vha_tgt.tgt_mutex);
 939         list_del(&logo->list);
 940         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 941
 942         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 943             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 944             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 945             logo->cmd_count, res);
 946 }
 947
 948 void qlt_free_session_done(struct work_struct *work)
 949 {
 950         struct fc_port *sess = container_of(work, struct fc_port,
 951             free_work);
 952         struct qla_tgt *tgt = sess->tgt;
 953         struct scsi_qla_host *vha = sess->vha;
 954         struct qla_hw_data *ha = vha->hw;
 955         unsigned long flags;
 956         bool logout_started = false;
 957         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 958         struct qlt_plogi_ack_t *own =
 959                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 960
 961         ql_dbg(ql_dbg_disc, vha, 0xf084,
 962                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 963                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 964                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 965                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 966                 sess->logout_on_delete, sess->keep_nport_handle,
 967                 sess->send_els_logo);
 968
 969         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 970                 qla2x00_mark_device_lost(vha, sess, 0);
 971
 972                 if (sess->send_els_logo) {
 973                         qlt_port_logo_t logo;
 974
 975                         logo.id = sess->d_id;
 976                         logo.cmd_count = 0;
 977                         if (!own)
 978                                 qlt_send_first_logo(vha, &logo);
 979                         sess->send_els_logo = 0;
 980                 }
 981
 982                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 983                         int rc;
 984
 985                         if (!own ||
 986                             (own &&
 987                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 988                                 rc = qla2x00_post_async_logout_work(vha, sess,
 989                                     NULL);
 990                                 if (rc != QLA_SUCCESS)
 991                                         ql_log(ql_log_warn, vha, 0xf085,
 992                                             "Schedule logo failed sess %p rc %d\n",
 993                                             sess, rc);
 994                                 else
 995                                         logout_started = true;
 996                         } else if (own && (own->iocb.u.isp24.status_subcode ==
 997                                 ELS_PRLI) && ha->flags.rida_fmt2) {
 998                                 rc = qla2x00_post_async_prlo_work(vha, sess,
 999                                     NULL);
1000                                 if (rc != QLA_SUCCESS)
1001                                         ql_log(ql_log_warn, vha, 0xf085,
1002                                             "Schedule PRLO failed sess %p rc %d\n",
1003                                             sess, rc);
1004                                 else
1005                                         logout_started = true;
1006                         }
1007                 } /* if sess->logout_on_delete */
1008
1009                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1010                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1011                         sess->nvme_flag |= NVME_FLAG_DELETING;
1012                         qla_nvme_unregister_remote_port(sess);
1013                 }
1014         }
1015
1016         /*
1017          * Release the target session for FC Nexus from fabric module code.
1018          */
1019         if (sess->se_sess != NULL)
1020                 ha->tgt.tgt_ops->free_session(sess);
1021
1022         if (logout_started) {
1023                 bool traced = false;
1024                 u16 cnt = 0;
1025
1026                 while (!READ_ONCE(sess->logout_completed)) {
1027                         if (!traced) {
1028                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1029                                         "%s: waiting for sess %p logout\n",
1030                                         __func__, sess);
1031                                 traced = true;
1032                         }
1033                         msleep(100);
1034                         cnt++;
1035                         if (cnt > 200)
1036                                 break;
1037                 }
1038
1039                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1040                     "%s: sess %p logout completed\n", __func__, sess);
1041         }
1042
1043         if (sess->logo_ack_needed) {
1044                 sess->logo_ack_needed = 0;
1045                 qla24xx_async_notify_ack(vha, sess,
1046                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1047         }
1048
1049         spin_lock_irqsave(&vha->work_lock, flags);
1050         sess->flags &= ~FCF_ASYNC_SENT;
1051         spin_unlock_irqrestore(&vha->work_lock, flags);
1052
1053         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1054         if (sess->se_sess) {
1055                 sess->se_sess = NULL;
1056                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1057                         tgt->sess_count--;
1058         }
1059
1060         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1061         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1062         sess->deleted = QLA_SESS_DELETED;
1063
1064         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1065                 vha->fcport_count--;
1066                 sess->login_succ = 0;
1067         }
1068
1069         qla2x00_clear_loop_id(sess);
1070
1071         if (sess->conflict) {
1072                 sess->conflict->login_pause = 0;
1073                 sess->conflict = NULL;
1074                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1075                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1076         }
1077
1078         {
1079                 struct qlt_plogi_ack_t *con =
1080                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1081                 struct imm_ntfy_from_isp *iocb;
1082
1083                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1084
1085                 if (con) {
1086                         iocb = &con->iocb;
1087                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1088                                  "se_sess %p / sess %p port %8phC is gone,"
1089                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1090                                  sess->se_sess, sess, sess->port_name,
1091                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1092                                  own ? own->ref_count : -1,
1093                                  iocb->u.isp24.port_name, con->ref_count);
1094                         qlt_plogi_ack_unref(vha, con);
1095                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1096                 } else {
1097                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1098                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1099                             sess->se_sess, sess, sess->port_name,
1100                             own ? "releasing own PLOGI" :
1101                             "no own PLOGI pending",
1102                             own ? own->ref_count : -1);
1103                 }
1104
1105                 if (own) {
1106                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1107                         qlt_plogi_ack_unref(vha, own);
1108                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1109                 }
1110         }
1111
1112         sess->explicit_logout = 0;
1113         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1114         sess->free_pending = 0;
1115
1116         ql_dbg(ql_dbg_disc, vha, 0xf001,
1117             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1118                 sess, sess->port_name, vha->fcport_count);
1119
1120         if (tgt && (tgt->sess_count == 0))
1121                 wake_up_all(&tgt->waitQ);
1122
1123         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1124             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1125             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1126                 switch (vha->host->active_mode) {
1127                 case MODE_INITIATOR:
1128                 case MODE_DUAL:
1129                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1130                         qla2xxx_wake_dpc(vha);
1131                         break;
1132                 case MODE_TARGET:
1133                 default:
1134                         /* no-op */
1135                         break;
1136                 }
1137         }
1138
1139         if (vha->fcport_count == 0)
1140                 wake_up_all(&vha->fcport_waitQ);
1141 }
1142
1143 /* ha->tgt.sess_lock supposed to be held on entry */
1144 void qlt_unreg_sess(struct fc_port *sess)
1145 {
1146         struct scsi_qla_host *vha = sess->vha;
1147         unsigned long flags;
1148
1149         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1150             "%s sess %p for deletion %8phC\n",
1151             __func__, sess, sess->port_name);
1152
1153         spin_lock_irqsave(&sess->vha->work_lock, flags);
1154         if (sess->free_pending) {
1155                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1156                 return;
1157         }
1158         sess->free_pending = 1;
1159         /*
1160          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1161          * management from being sent.
1162          */
1163         sess->flags |= FCF_ASYNC_SENT;
1164         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1165
1166         if (sess->se_sess)
1167                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1168
1169         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1170         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1171         sess->last_rscn_gen = sess->rscn_gen;
1172         sess->last_login_gen = sess->login_gen;
1173
1174         queue_work(sess->vha->hw->wq, &sess->free_work);
1175 }
1176 EXPORT_SYMBOL(qlt_unreg_sess);
1177
1178 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1179 {
1180         struct qla_hw_data *ha = vha->hw;
1181         struct fc_port *sess = NULL;
1182         uint16_t loop_id;
1183         int res = 0;
1184         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1185         unsigned long flags;
1186
1187         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1188         if (loop_id == 0xFFFF) {
1189                 /* Global event */
1190                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1191                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1192                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1193                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1194         } else {
1195                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1196                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1197                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1198         }
1199
1200         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1201             "Using sess for qla_tgt_reset: %p\n", sess);
1202         if (!sess) {
1203                 res = -ESRCH;
1204                 return res;
1205         }
1206
1207         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1208             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1209             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1210             mcmd, loop_id);
1211
1212         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1213 }
1214
1215 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1216 {
1217         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1218                 sess->logout_on_delete = 0;
1219                 sess->logo_ack_needed = 0;
1220                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1221         }
1222 }
1223
1224 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1225 {
1226         struct qla_tgt *tgt = sess->tgt;
1227         unsigned long flags;
1228         u16 sec;
1229
1230         switch (sess->disc_state) {
1231         case DSC_DELETE_PEND:
1232                 return;
1233         case DSC_DELETED:
1234                 if (tgt && tgt->tgt_stop && (tgt->sess_count == 0))
1235                         wake_up_all(&tgt->waitQ);
1236                 if (sess->vha->fcport_count == 0)
1237                         wake_up_all(&sess->vha->fcport_waitQ);
1238
1239                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1240                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT])
1241                         return;
1242                 break;
1243         case DSC_UPD_FCPORT:
1244                 /*
1245                  * This port is not done reporting to upper layer.
1246                  * let it finish
1247                  */
1248                 sess->next_disc_state = DSC_DELETE_PEND;
1249                 sec = jiffies_to_msecs(jiffies -
1250                     sess->jiffies_at_registration)/1000;
1251                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1252                         sess->sec_since_registration = sec;
1253                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1254                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1255                             __func__, sess->port_name, sec);
1256                 }
1257                 return;
1258         default:
1259                 break;
1260         }
1261
1262         spin_lock_irqsave(&sess->vha->work_lock, flags);
1263         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1264                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1265                 return;
1266         }
1267         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1268         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1269
1270         sess->prli_pend_timer = 0;
1271         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1272
1273         qla24xx_chk_fcp_state(sess);
1274
1275         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1276             "Scheduling sess %p for deletion %8phC\n",
1277             sess, sess->port_name);
1278
1279         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1280 }
1281
1282 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1283 {
1284         struct fc_port *sess;
1285         scsi_qla_host_t *vha = tgt->vha;
1286
1287         list_for_each_entry(sess, &vha->vp_fcports, list) {
1288                 if (sess->se_sess)
1289                         qlt_schedule_sess_for_deletion(sess);
1290         }
1291
1292         /* At this point tgt could be already dead */
1293 }
1294
1295 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1296         uint16_t *loop_id)
1297 {
1298         struct qla_hw_data *ha = vha->hw;
1299         dma_addr_t gid_list_dma;
1300         struct gid_list_info *gid_list, *gid;
1301         int res, rc, i;
1302         uint16_t entries;
1303
1304         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1305             &gid_list_dma, GFP_KERNEL);
1306         if (!gid_list) {
1307                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1308                     "qla_target(%d): DMA Alloc failed of %u\n",
1309                     vha->vp_idx, qla2x00_gid_list_size(ha));
1310                 return -ENOMEM;
1311         }
1312
1313         /* Get list of logged in devices */
1314         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1315         if (rc != QLA_SUCCESS) {
1316                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1317                     "qla_target(%d): get_id_list() failed: %x\n",
1318                     vha->vp_idx, rc);
1319                 res = -EBUSY;
1320                 goto out_free_id_list;
1321         }
1322
1323         gid = gid_list;
1324         res = -ENOENT;
1325         for (i = 0; i < entries; i++) {
1326                 if (gid->al_pa == s_id.al_pa &&
1327                     gid->area == s_id.area &&
1328                     gid->domain == s_id.domain) {
1329                         *loop_id = le16_to_cpu(gid->loop_id);
1330                         res = 0;
1331                         break;
1332                 }
1333                 gid = (void *)gid + ha->gid_list_info_size;
1334         }
1335
1336 out_free_id_list:
1337         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1338             gid_list, gid_list_dma);
1339         return res;
1340 }
1341
1342 /*
1343  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1344  * Caller must put it.
1345  */
1346 static struct fc_port *qlt_create_sess(
1347         struct scsi_qla_host *vha,
1348         fc_port_t *fcport,
1349         bool local)
1350 {
1351         struct qla_hw_data *ha = vha->hw;
1352         struct fc_port *sess = fcport;
1353         unsigned long flags;
1354
1355         if (vha->vha_tgt.qla_tgt->tgt_stop)
1356                 return NULL;
1357
1358         if (fcport->se_sess) {
1359                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1360                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1361                             "%s: kref_get_unless_zero failed for %8phC\n",
1362                             __func__, sess->port_name);
1363                         return NULL;
1364                 }
1365                 return fcport;
1366         }
1367         sess->tgt = vha->vha_tgt.qla_tgt;
1368         sess->local = local;
1369
1370         /*
1371          * Under normal circumstances we want to logout from firmware when
1372          * session eventually ends and release corresponding nport handle.
1373          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1374          * code will adjust these flags as necessary.
1375          */
1376         sess->logout_on_delete = 1;
1377         sess->keep_nport_handle = 0;
1378         sess->logout_completed = 0;
1379
1380         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1381             &fcport->port_name[0], sess) < 0) {
1382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1383                     "(%d) %8phC check_initiator_node_acl failed\n",
1384                     vha->vp_idx, fcport->port_name);
1385                 return NULL;
1386         } else {
1387                 kref_init(&fcport->sess_kref);
1388                 /*
1389                  * Take an extra reference to ->sess_kref here to handle
1390                  * fc_port access across ->tgt.sess_lock reaquire.
1391                  */
1392                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1393                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1394                             "%s: kref_get_unless_zero failed for %8phC\n",
1395                             __func__, sess->port_name);
1396                         return NULL;
1397                 }
1398
1399                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1400                 if (!IS_SW_RESV_ADDR(sess->d_id))
1401                         vha->vha_tgt.qla_tgt->sess_count++;
1402
1403                 qlt_do_generation_tick(vha, &sess->generation);
1404                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1405         }
1406
1407         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1408             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1409             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1410             vha->vha_tgt.qla_tgt->sess_count);
1411
1412         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1413             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1414             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1415             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1416             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1417             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1418
1419         return sess;
1420 }
1421
1422 /*
1423  * max_gen - specifies maximum session generation
1424  * at which this deletion requestion is still valid
1425  */
1426 void
1427 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1428 {
1429         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1430         struct fc_port *sess = fcport;
1431         unsigned long flags;
1432
1433         if (!vha->hw->tgt.tgt_ops)
1434                 return;
1435
1436         if (!tgt)
1437                 return;
1438
1439         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1440         if (tgt->tgt_stop) {
1441                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1442                 return;
1443         }
1444         if (!sess->se_sess) {
1445                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1446                 return;
1447         }
1448
1449         if (max_gen - sess->generation < 0) {
1450                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1452                     "Ignoring stale deletion request for se_sess %p / sess %p"
1453                     " for port %8phC, req_gen %d, sess_gen %d\n",
1454                     sess->se_sess, sess, sess->port_name, max_gen,
1455                     sess->generation);
1456                 return;
1457         }
1458
1459         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1460
1461         sess->local = 1;
1462         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1463         qlt_schedule_sess_for_deletion(sess);
1464 }
1465
1466 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1467 {
1468         struct qla_hw_data *ha = tgt->ha;
1469         unsigned long flags;
1470         int res;
1471         /*
1472          * We need to protect against race, when tgt is freed before or
1473          * inside wake_up()
1474          */
1475         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1476         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1477             "tgt %p, sess_count=%d\n",
1478             tgt, tgt->sess_count);
1479         res = (tgt->sess_count == 0);
1480         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1481
1482         return res;
1483 }
1484
1485 /* Called by tcm_qla2xxx configfs code */
1486 int qlt_stop_phase1(struct qla_tgt *tgt)
1487 {
1488         struct scsi_qla_host *vha = tgt->vha;
1489         struct qla_hw_data *ha = tgt->ha;
1490         unsigned long flags;
1491
1492         mutex_lock(&ha->optrom_mutex);
1493         mutex_lock(&qla_tgt_mutex);
1494
1495         if (tgt->tgt_stop || tgt->tgt_stopped) {
1496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1497                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1498                 mutex_unlock(&qla_tgt_mutex);
1499                 mutex_unlock(&ha->optrom_mutex);
1500                 return -EPERM;
1501         }
1502
1503         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1504             vha->host_no, vha);
1505         /*
1506          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1507          * Lock is needed, because we still can get an incoming packet.
1508          */
1509         mutex_lock(&vha->vha_tgt.tgt_mutex);
1510         tgt->tgt_stop = 1;
1511         qlt_clear_tgt_db(tgt);
1512         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1513         mutex_unlock(&qla_tgt_mutex);
1514
1515         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1516             "Waiting for sess works (tgt %p)", tgt);
1517         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1518         while (!list_empty(&tgt->sess_works_list)) {
1519                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1520                 flush_scheduled_work();
1521                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1522         }
1523         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1524
1525         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1526             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1527
1528         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1529
1530         /* Big hammer */
1531         if (!ha->flags.host_shutting_down &&
1532             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1533                 qlt_disable_vha(vha);
1534
1535         /* Wait for sessions to clear out (just in case) */
1536         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1537         mutex_unlock(&ha->optrom_mutex);
1538
1539         return 0;
1540 }
1541 EXPORT_SYMBOL(qlt_stop_phase1);
1542
1543 /* Called by tcm_qla2xxx configfs code */
1544 void qlt_stop_phase2(struct qla_tgt *tgt)
1545 {
1546         scsi_qla_host_t *vha = tgt->vha;
1547
1548         if (tgt->tgt_stopped) {
1549                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1550                     "Already in tgt->tgt_stopped state\n");
1551                 dump_stack();
1552                 return;
1553         }
1554         if (!tgt->tgt_stop) {
1555                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1556                     "%s: phase1 stop is not completed\n", __func__);
1557                 dump_stack();
1558                 return;
1559         }
1560
1561         mutex_lock(&vha->vha_tgt.tgt_mutex);
1562         tgt->tgt_stop = 0;
1563         tgt->tgt_stopped = 1;
1564         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1565
1566         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1567             tgt);
1568
1569         switch (vha->qlini_mode) {
1570         case QLA2XXX_INI_MODE_EXCLUSIVE:
1571                 vha->flags.online = 1;
1572                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1573                 break;
1574         default:
1575                 break;
1576         }
1577 }
1578 EXPORT_SYMBOL(qlt_stop_phase2);
1579
1580 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1581 static void qlt_release(struct qla_tgt *tgt)
1582 {
1583         scsi_qla_host_t *vha = tgt->vha;
1584         void *node;
1585         u64 key = 0;
1586         u16 i;
1587         struct qla_qpair_hint *h;
1588         struct qla_hw_data *ha = vha->hw;
1589
1590         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1591                 qlt_stop_phase1(tgt);
1592
1593         if (!tgt->tgt_stopped)
1594                 qlt_stop_phase2(tgt);
1595
1596         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1597                 unsigned long flags;
1598
1599                 h = &tgt->qphints[i];
1600                 if (h->qpair) {
1601                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1602                         list_del(&h->hint_elem);
1603                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1604                         h->qpair = NULL;
1605                 }
1606         }
1607         kfree(tgt->qphints);
1608         mutex_lock(&qla_tgt_mutex);
1609         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1610         mutex_unlock(&qla_tgt_mutex);
1611
1612         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1613                 btree_remove64(&tgt->lun_qpair_map, key);
1614
1615         btree_destroy64(&tgt->lun_qpair_map);
1616
1617         if (vha->vp_idx)
1618                 if (ha->tgt.tgt_ops &&
1619                     ha->tgt.tgt_ops->remove_target &&
1620                     vha->vha_tgt.target_lport_ptr)
1621                         ha->tgt.tgt_ops->remove_target(vha);
1622
1623         vha->vha_tgt.qla_tgt = NULL;
1624
1625         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1626             "Release of tgt %p finished\n", tgt);
1627
1628         kfree(tgt);
1629 }
1630
1631 /* ha->hardware_lock supposed to be held on entry */
1632 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1633         const void *param, unsigned int param_size)
1634 {
1635         struct qla_tgt_sess_work_param *prm;
1636         unsigned long flags;
1637
1638         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1639         if (!prm) {
1640                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1641                     "qla_target(%d): Unable to create session "
1642                     "work, command will be refused", 0);
1643                 return -ENOMEM;
1644         }
1645
1646         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1647             "Scheduling work (type %d, prm %p)"
1648             " to find session for param %p (size %d, tgt %p)\n",
1649             type, prm, param, param_size, tgt);
1650
1651         prm->type = type;
1652         memcpy(&prm->tm_iocb, param, param_size);
1653
1654         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1655         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1656         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1657
1658         schedule_work(&tgt->sess_work);
1659
1660         return 0;
1661 }
1662
1663 /*
1664  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1665  */
1666 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1667         struct imm_ntfy_from_isp *ntfy,
1668         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1669         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1670 {
1671         struct scsi_qla_host *vha = qpair->vha;
1672         struct qla_hw_data *ha = vha->hw;
1673         request_t *pkt;
1674         struct nack_to_isp *nack;
1675
1676         if (!ha->flags.fw_started)
1677                 return;
1678
1679         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1680
1681         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1682         if (!pkt) {
1683                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1684                     "qla_target(%d): %s failed: unable to allocate "
1685                     "request packet\n", vha->vp_idx, __func__);
1686                 return;
1687         }
1688
1689         if (vha->vha_tgt.qla_tgt != NULL)
1690                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1691
1692         pkt->entry_type = NOTIFY_ACK_TYPE;
1693         pkt->entry_count = 1;
1694
1695         nack = (struct nack_to_isp *)pkt;
1696         nack->ox_id = ntfy->ox_id;
1697
1698         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1699         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1700         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1701                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1702                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1703         }
1704         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1705         nack->u.isp24.status = ntfy->u.isp24.status;
1706         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1707         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1708         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1709         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1710         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1711         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1712         nack->u.isp24.srr_reject_code = srr_reject_code;
1713         nack->u.isp24.srr_reject_code_expl = srr_explan;
1714         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1715
1716         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1717             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1718             vha->vp_idx, nack->u.isp24.status);
1719
1720         /* Memory Barrier */
1721         wmb();
1722         qla2x00_start_iocbs(vha, qpair->req);
1723 }
1724
1725 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1726 {
1727         struct scsi_qla_host *vha = mcmd->vha;
1728         struct qla_hw_data *ha = vha->hw;
1729         struct abts_resp_to_24xx *resp;
1730         uint32_t f_ctl, h;
1731         uint8_t *p;
1732         int rc;
1733         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1734         struct qla_qpair *qpair = mcmd->qpair;
1735
1736         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1737             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1738             ha, mcmd->fc_tm_rsp);
1739
1740         rc = qlt_check_reserve_free_req(qpair, 1);
1741         if (rc) {
1742                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1743                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1744                     vha->vp_idx, __func__);
1745                 return -EAGAIN;
1746         }
1747
1748         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1749         memset(resp, 0, sizeof(*resp));
1750
1751         h = qlt_make_handle(qpair);
1752         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1753                 /*
1754                  * CTIO type 7 from the firmware doesn't provide a way to
1755                  * know the initiator's LOOP ID, hence we can't find
1756                  * the session and, so, the command.
1757                  */
1758                 return -EAGAIN;
1759         } else {
1760                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1761         }
1762
1763         resp->handle = MAKE_HANDLE(qpair->req->id, h);
1764         resp->entry_type = ABTS_RESP_24XX;
1765         resp->entry_count = 1;
1766         resp->nport_handle = abts->nport_handle;
1767         resp->vp_index = vha->vp_idx;
1768         resp->sof_type = abts->sof_type;
1769         resp->exchange_address = abts->exchange_address;
1770         resp->fcp_hdr_le = abts->fcp_hdr_le;
1771         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1772             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1773             F_CTL_SEQ_INITIATIVE);
1774         p = (uint8_t *)&f_ctl;
1775         resp->fcp_hdr_le.f_ctl[0] = *p++;
1776         resp->fcp_hdr_le.f_ctl[1] = *p++;
1777         resp->fcp_hdr_le.f_ctl[2] = *p;
1778
1779         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1780         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1781
1782         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1783         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1784                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1785                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1786                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1787                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1788                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1789                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1790         } else {
1791                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1792                 resp->payload.ba_rjt.reason_code =
1793                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1794                 /* Other bytes are zero */
1795         }
1796
1797         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1798
1799         /* Memory Barrier */
1800         wmb();
1801         if (qpair->reqq_start_iocbs)
1802                 qpair->reqq_start_iocbs(qpair);
1803         else
1804                 qla2x00_start_iocbs(vha, qpair->req);
1805
1806         return rc;
1807 }
1808
1809 /*
1810  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1811  */
1812 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1813         struct abts_recv_from_24xx *abts, uint32_t status,
1814         bool ids_reversed)
1815 {
1816         struct scsi_qla_host *vha = qpair->vha;
1817         struct qla_hw_data *ha = vha->hw;
1818         struct abts_resp_to_24xx *resp;
1819         uint32_t f_ctl;
1820         uint8_t *p;
1821
1822         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1823             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1824             ha, abts, status);
1825
1826         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1827             NULL);
1828         if (!resp) {
1829                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1830                     "qla_target(%d): %s failed: unable to allocate "
1831                     "request packet", vha->vp_idx, __func__);
1832                 return;
1833         }
1834
1835         resp->entry_type = ABTS_RESP_24XX;
1836         resp->handle = QLA_TGT_SKIP_HANDLE;
1837         resp->entry_count = 1;
1838         resp->nport_handle = abts->nport_handle;
1839         resp->vp_index = vha->vp_idx;
1840         resp->sof_type = abts->sof_type;
1841         resp->exchange_address = abts->exchange_address;
1842         resp->fcp_hdr_le = abts->fcp_hdr_le;
1843         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1844             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1845             F_CTL_SEQ_INITIATIVE);
1846         p = (uint8_t *)&f_ctl;
1847         resp->fcp_hdr_le.f_ctl[0] = *p++;
1848         resp->fcp_hdr_le.f_ctl[1] = *p++;
1849         resp->fcp_hdr_le.f_ctl[2] = *p;
1850         if (ids_reversed) {
1851                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1852                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1853         } else {
1854                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1855                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1856         }
1857         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1858         if (status == FCP_TMF_CMPL) {
1859                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1860                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1861                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1862                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1863                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1864                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1865         } else {
1866                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1867                 resp->payload.ba_rjt.reason_code =
1868                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1869                 /* Other bytes are zero */
1870         }
1871
1872         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1873
1874         /* Memory Barrier */
1875         wmb();
1876         if (qpair->reqq_start_iocbs)
1877                 qpair->reqq_start_iocbs(qpair);
1878         else
1879                 qla2x00_start_iocbs(vha, qpair->req);
1880 }
1881
1882 /*
1883  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1884  */
1885 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1886     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1887 {
1888         struct ctio7_to_24xx *ctio;
1889         u16 tmp;
1890         struct abts_recv_from_24xx *entry;
1891
1892         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1893         if (ctio == NULL) {
1894                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1895                     "qla_target(%d): %s failed: unable to allocate "
1896                     "request packet\n", vha->vp_idx, __func__);
1897                 return;
1898         }
1899
1900         if (mcmd)
1901                 /* abts from remote port */
1902                 entry = &mcmd->orig_iocb.abts;
1903         else
1904                 /* abts from this driver.  */
1905                 entry = (struct abts_recv_from_24xx *)pkt;
1906
1907         /*
1908          * We've got on entrance firmware's response on by us generated
1909          * ABTS response. So, in it ID fields are reversed.
1910          */
1911
1912         ctio->entry_type = CTIO_TYPE7;
1913         ctio->entry_count = 1;
1914         ctio->nport_handle = entry->nport_handle;
1915         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1916         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1917         ctio->vp_index = vha->vp_idx;
1918         ctio->exchange_addr = entry->exchange_addr_to_abort;
1919         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1920
1921         if (mcmd) {
1922                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1923
1924                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1925                         tmp |= (mcmd->abort_io_attr << 9);
1926                 else if (qpair->retry_term_cnt & 1)
1927                         tmp |= (0x4 << 9);
1928         } else {
1929                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1930
1931                 if (qpair->retry_term_cnt & 1)
1932                         tmp |= (0x4 << 9);
1933         }
1934         ctio->u.status1.flags = cpu_to_le16(tmp);
1935         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1936
1937         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1938             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1939             le16_to_cpu(ctio->u.status1.flags),
1940             le16_to_cpu(ctio->u.status1.ox_id),
1941             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1942
1943         /* Memory Barrier */
1944         wmb();
1945         if (qpair->reqq_start_iocbs)
1946                 qpair->reqq_start_iocbs(qpair);
1947         else
1948                 qla2x00_start_iocbs(vha, qpair->req);
1949
1950         if (mcmd)
1951                 qlt_build_abts_resp_iocb(mcmd);
1952         else
1953                 qlt_24xx_send_abts_resp(qpair,
1954                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
1955
1956 }
1957
1958 /* drop cmds for the given lun
1959  * XXX only looks for cmds on the port through which lun reset was recieved
1960  * XXX does not go through the list of other port (which may have cmds
1961  *     for the same lun)
1962  */
1963 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
1964 {
1965         struct qla_tgt_sess_op *op;
1966         struct qla_tgt_cmd *cmd;
1967         uint32_t key;
1968         unsigned long flags;
1969
1970         key = sid_to_key(s_id);
1971         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1972         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1973                 uint32_t op_key;
1974                 u64 op_lun;
1975
1976                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1977                 op_lun = scsilun_to_int(
1978                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1979                 if (op_key == key && op_lun == lun)
1980                         op->aborted = true;
1981         }
1982
1983         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1984                 uint32_t op_key;
1985                 u64 op_lun;
1986
1987                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1988                 op_lun = scsilun_to_int(
1989                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1990                 if (op_key == key && op_lun == lun)
1991                         op->aborted = true;
1992         }
1993
1994         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1995                 uint32_t cmd_key;
1996                 u64 cmd_lun;
1997
1998                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1999                 cmd_lun = scsilun_to_int(
2000                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2001                 if (cmd_key == key && cmd_lun == lun)
2002                         cmd->aborted = 1;
2003         }
2004         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2005 }
2006
2007 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2008     uint64_t unpacked_lun)
2009 {
2010         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2011         struct qla_qpair_hint *h = NULL;
2012
2013         if (vha->flags.qpairs_available) {
2014                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2015                 if (!h)
2016                         h = &tgt->qphints[0];
2017         } else {
2018                 h = &tgt->qphints[0];
2019         }
2020
2021         return h;
2022 }
2023
2024 static void qlt_do_tmr_work(struct work_struct *work)
2025 {
2026         struct qla_tgt_mgmt_cmd *mcmd =
2027                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2028         struct qla_hw_data *ha = mcmd->vha->hw;
2029         int rc = EIO;
2030         uint32_t tag;
2031         unsigned long flags;
2032
2033         switch (mcmd->tmr_func) {
2034         case QLA_TGT_ABTS:
2035                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
2036                 break;
2037         default:
2038                 tag = 0;
2039                 break;
2040         }
2041
2042         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2043             mcmd->tmr_func, tag);
2044
2045         if (rc != 0) {
2046                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2047                 switch (mcmd->tmr_func) {
2048                 case QLA_TGT_ABTS:
2049                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2050                         qlt_build_abts_resp_iocb(mcmd);
2051                         break;
2052                 case QLA_TGT_LUN_RESET:
2053                 case QLA_TGT_CLEAR_TS:
2054                 case QLA_TGT_ABORT_TS:
2055                 case QLA_TGT_CLEAR_ACA:
2056                 case QLA_TGT_TARGET_RESET:
2057                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2058                             qla_sam_status);
2059                         break;
2060
2061                 case QLA_TGT_ABORT_ALL:
2062                 case QLA_TGT_NEXUS_LOSS_SESS:
2063                 case QLA_TGT_NEXUS_LOSS:
2064                         qlt_send_notify_ack(mcmd->qpair,
2065                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2066                         break;
2067                 }
2068                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2069
2070                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2071                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2072                     mcmd->vha->vp_idx, rc);
2073                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2074         }
2075 }
2076
2077 /* ha->hardware_lock supposed to be held on entry */
2078 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2079         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2080 {
2081         struct qla_hw_data *ha = vha->hw;
2082         struct qla_tgt_mgmt_cmd *mcmd;
2083         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2084
2085         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2086             "qla_target(%d): task abort (tag=%d)\n",
2087             vha->vp_idx, abts->exchange_addr_to_abort);
2088
2089         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2090         if (mcmd == NULL) {
2091                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2092                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2093                     vha->vp_idx, __func__);
2094                 return -ENOMEM;
2095         }
2096         memset(mcmd, 0, sizeof(*mcmd));
2097         mcmd->cmd_type = TYPE_TGT_TMCMD;
2098         mcmd->sess = sess;
2099         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2100         mcmd->reset_count = ha->base_qpair->chip_reset;
2101         mcmd->tmr_func = QLA_TGT_ABTS;
2102         mcmd->qpair = h->qpair;
2103         mcmd->vha = vha;
2104
2105         /*
2106          * LUN is looked up by target-core internally based on the passed
2107          * abts->exchange_addr_to_abort tag.
2108          */
2109         mcmd->se_cmd.cpuid = h->cpuid;
2110
2111         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2112                 struct qla_tgt_cmd *abort_cmd;
2113
2114                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2115                     abts->exchange_addr_to_abort);
2116                 if (abort_cmd && abort_cmd->qpair) {
2117                         mcmd->qpair = abort_cmd->qpair;
2118                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2119                         mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2120                         mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2121                 }
2122         }
2123
2124         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2125         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2126
2127         return 0;
2128 }
2129
2130 /*
2131  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2132  */
2133 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2134         struct abts_recv_from_24xx *abts)
2135 {
2136         struct qla_hw_data *ha = vha->hw;
2137         struct fc_port *sess;
2138         uint32_t tag = abts->exchange_addr_to_abort;
2139         be_id_t s_id;
2140         int rc;
2141         unsigned long flags;
2142
2143         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2144                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2145                     "qla_target(%d): ABTS: Abort Sequence not "
2146                     "supported\n", vha->vp_idx);
2147                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2148                     false);
2149                 return;
2150         }
2151
2152         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2154                     "qla_target(%d): ABTS: Unknown Exchange "
2155                     "Address received\n", vha->vp_idx);
2156                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2157                     false);
2158                 return;
2159         }
2160
2161         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2162             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2163             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2164             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2165             le32_to_cpu(abts->fcp_hdr_le.parameter));
2166
2167         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2168
2169         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2170         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2171         if (!sess) {
2172                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2173                     "qla_target(%d): task abort for non-existent session\n",
2174                     vha->vp_idx);
2175                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2176
2177                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2178                             false);
2179                 return;
2180         }
2181         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2182
2183
2184         if (sess->deleted) {
2185                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2186                     false);
2187                 return;
2188         }
2189
2190         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2191         if (rc != 0) {
2192                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2193                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2194                     vha->vp_idx, rc);
2195                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2196                     false);
2197                 return;
2198         }
2199 }
2200
2201 /*
2202  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2203  */
2204 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2205         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2206 {
2207         struct scsi_qla_host *ha = mcmd->vha;
2208         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2209         struct ctio7_to_24xx *ctio;
2210         uint16_t temp;
2211
2212         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2213             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2214             ha, atio, resp_code);
2215
2216
2217         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2218         if (ctio == NULL) {
2219                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2220                     "qla_target(%d): %s failed: unable to allocate "
2221                     "request packet\n", ha->vp_idx, __func__);
2222                 return;
2223         }
2224
2225         ctio->entry_type = CTIO_TYPE7;
2226         ctio->entry_count = 1;
2227         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2228         ctio->nport_handle = mcmd->sess->loop_id;
2229         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2230         ctio->vp_index = ha->vp_idx;
2231         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2232         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2233         temp = (atio->u.isp24.attr << 9)|
2234                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2235         ctio->u.status1.flags = cpu_to_le16(temp);
2236         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2237         ctio->u.status1.ox_id = cpu_to_le16(temp);
2238         ctio->u.status1.scsi_status =
2239             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2240         ctio->u.status1.response_len = cpu_to_le16(8);
2241         ctio->u.status1.sense_data[0] = resp_code;
2242
2243         /* Memory Barrier */
2244         wmb();
2245         if (qpair->reqq_start_iocbs)
2246                 qpair->reqq_start_iocbs(qpair);
2247         else
2248                 qla2x00_start_iocbs(ha, qpair->req);
2249 }
2250
2251 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2252 {
2253         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2254 }
2255 EXPORT_SYMBOL(qlt_free_mcmd);
2256
2257 /*
2258  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2259  * reacquire
2260  */
2261 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2262     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2263 {
2264         struct atio_from_isp *atio = &cmd->atio;
2265         struct ctio7_to_24xx *ctio;
2266         uint16_t temp;
2267         struct scsi_qla_host *vha = cmd->vha;
2268
2269         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2270             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2271             "sense_key=%02x, asc=%02x, ascq=%02x",
2272             vha, atio, scsi_status, sense_key, asc, ascq);
2273
2274         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2275         if (!ctio) {
2276                 ql_dbg(ql_dbg_async, vha, 0x3067,
2277                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2278                     vha->host_no, __func__);
2279                 goto out;
2280         }
2281
2282         ctio->entry_type = CTIO_TYPE7;
2283         ctio->entry_count = 1;
2284         ctio->handle = QLA_TGT_SKIP_HANDLE;
2285         ctio->nport_handle = cmd->sess->loop_id;
2286         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2287         ctio->vp_index = vha->vp_idx;
2288         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2289         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2290         temp = (atio->u.isp24.attr << 9) |
2291             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2292         ctio->u.status1.flags = cpu_to_le16(temp);
2293         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2294         ctio->u.status1.ox_id = cpu_to_le16(temp);
2295         ctio->u.status1.scsi_status =
2296             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2297         ctio->u.status1.response_len = cpu_to_le16(18);
2298         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2299
2300         if (ctio->u.status1.residual != 0)
2301                 ctio->u.status1.scsi_status |=
2302                     cpu_to_le16(SS_RESIDUAL_UNDER);
2303
2304         /* Fixed format sense data. */
2305         ctio->u.status1.sense_data[0] = 0x70;
2306         ctio->u.status1.sense_data[2] = sense_key;
2307         /* Additional sense length */
2308         ctio->u.status1.sense_data[7] = 0xa;
2309         /* ASC and ASCQ */
2310         ctio->u.status1.sense_data[12] = asc;
2311         ctio->u.status1.sense_data[13] = ascq;
2312
2313         /* Memory Barrier */
2314         wmb();
2315
2316         if (qpair->reqq_start_iocbs)
2317                 qpair->reqq_start_iocbs(qpair);
2318         else
2319                 qla2x00_start_iocbs(vha, qpair->req);
2320
2321 out:
2322         return;
2323 }
2324
2325 /* callback from target fabric module code */
2326 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2327 {
2328         struct scsi_qla_host *vha = mcmd->sess->vha;
2329         struct qla_hw_data *ha = vha->hw;
2330         unsigned long flags;
2331         struct qla_qpair *qpair = mcmd->qpair;
2332         bool free_mcmd = true;
2333
2334         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2335             "TM response mcmd (%p) status %#x state %#x",
2336             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2337
2338         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2339
2340         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2341                 /*
2342                  * Either the port is not online or this request was from
2343                  * previous life, just abort the processing.
2344                  */
2345                 ql_dbg(ql_dbg_async, vha, 0xe100,
2346                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2347                         vha->flags.online, qla2x00_reset_active(vha),
2348                         mcmd->reset_count, qpair->chip_reset);
2349                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2350                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2351                 return;
2352         }
2353
2354         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2355                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2356                 case ELS_LOGO:
2357                 case ELS_PRLO:
2358                 case ELS_TPRLO:
2359                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2360                             "TM response logo %8phC status %#x state %#x",
2361                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2362                             mcmd->flags);
2363                         qlt_schedule_sess_for_deletion(mcmd->sess);
2364                         break;
2365                 default:
2366                         qlt_send_notify_ack(vha->hw->base_qpair,
2367                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2368                         break;
2369                 }
2370         } else {
2371                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2372                         qlt_build_abts_resp_iocb(mcmd);
2373                         free_mcmd = false;
2374                 } else
2375                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2376                             mcmd->fc_tm_rsp);
2377         }
2378         /*
2379          * Make the callback for ->free_mcmd() to queue_work() and invoke
2380          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2381          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2382          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2383          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2384          * qlt_xmit_tm_rsp() returns here..
2385          */
2386         if (free_mcmd)
2387                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2388
2389         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2390 }
2391 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2392
2393 /* No locks */
2394 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2395 {
2396         struct qla_tgt_cmd *cmd = prm->cmd;
2397
2398         BUG_ON(cmd->sg_cnt == 0);
2399
2400         prm->sg = (struct scatterlist *)cmd->sg;
2401         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2402             cmd->sg_cnt, cmd->dma_data_direction);
2403         if (unlikely(prm->seg_cnt == 0))
2404                 goto out_err;
2405
2406         prm->cmd->sg_mapped = 1;
2407
2408         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2409                 /*
2410                  * If greater than four sg entries then we need to allocate
2411                  * the continuation entries
2412                  */
2413                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2414                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2415                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2416                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2417         } else {
2418                 /* DIF */
2419                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2420                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2421                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2422                         prm->tot_dsds = prm->seg_cnt;
2423                 } else
2424                         prm->tot_dsds = prm->seg_cnt;
2425
2426                 if (cmd->prot_sg_cnt) {
2427                         prm->prot_sg      = cmd->prot_sg;
2428                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2429                                 cmd->prot_sg, cmd->prot_sg_cnt,
2430                                 cmd->dma_data_direction);
2431                         if (unlikely(prm->prot_seg_cnt == 0))
2432                                 goto out_err;
2433
2434                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2435                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2436                                 /* Dif Bundling not support here */
2437                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2438                                                                 cmd->blk_sz);
2439                                 prm->tot_dsds += prm->prot_seg_cnt;
2440                         } else
2441                                 prm->tot_dsds += prm->prot_seg_cnt;
2442                 }
2443         }
2444
2445         return 0;
2446
2447 out_err:
2448         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2449             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2450             0, prm->cmd->sg_cnt);
2451         return -1;
2452 }
2453
2454 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2455 {
2456         struct qla_hw_data *ha;
2457         struct qla_qpair *qpair;
2458
2459         if (!cmd->sg_mapped)
2460                 return;
2461
2462         qpair = cmd->qpair;
2463
2464         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2465             cmd->dma_data_direction);
2466         cmd->sg_mapped = 0;
2467
2468         if (cmd->prot_sg_cnt)
2469                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2470                         cmd->dma_data_direction);
2471
2472         if (!cmd->ctx)
2473                 return;
2474         ha = vha->hw;
2475         if (cmd->ctx_dsd_alloced)
2476                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2477
2478         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2479 }
2480
2481 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2482         uint32_t req_cnt)
2483 {
2484         uint32_t cnt;
2485         struct req_que *req = qpair->req;
2486
2487         if (req->cnt < (req_cnt + 2)) {
2488                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2489                     RD_REG_DWORD_RELAXED(req->req_q_out));
2490
2491                 if  (req->ring_index < cnt)
2492                         req->cnt = cnt - req->ring_index;
2493                 else
2494                         req->cnt = req->length - (req->ring_index - cnt);
2495
2496                 if (unlikely(req->cnt < (req_cnt + 2)))
2497                         return -EAGAIN;
2498         }
2499
2500         req->cnt -= req_cnt;
2501
2502         return 0;
2503 }
2504
2505 /*
2506  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2507  */
2508 static inline void *qlt_get_req_pkt(struct req_que *req)
2509 {
2510         /* Adjust ring index. */
2511         req->ring_index++;
2512         if (req->ring_index == req->length) {
2513                 req->ring_index = 0;
2514                 req->ring_ptr = req->ring;
2515         } else {
2516                 req->ring_ptr++;
2517         }
2518         return (cont_entry_t *)req->ring_ptr;
2519 }
2520
2521 /* ha->hardware_lock supposed to be held on entry */
2522 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2523 {
2524         uint32_t h;
2525         int index;
2526         uint8_t found = 0;
2527         struct req_que *req = qpair->req;
2528
2529         h = req->current_outstanding_cmd;
2530
2531         for (index = 1; index < req->num_outstanding_cmds; index++) {
2532                 h++;
2533                 if (h == req->num_outstanding_cmds)
2534                         h = 1;
2535
2536                 if (h == QLA_TGT_SKIP_HANDLE)
2537                         continue;
2538
2539                 if (!req->outstanding_cmds[h]) {
2540                         found = 1;
2541                         break;
2542                 }
2543         }
2544
2545         if (found) {
2546                 req->current_outstanding_cmd = h;
2547         } else {
2548                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2549                     "qla_target(%d): Ran out of empty cmd slots\n",
2550                     qpair->vha->vp_idx);
2551                 h = QLA_TGT_NULL_HANDLE;
2552         }
2553
2554         return h;
2555 }
2556
2557 /* ha->hardware_lock supposed to be held on entry */
2558 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2559         struct qla_tgt_prm *prm)
2560 {
2561         uint32_t h;
2562         struct ctio7_to_24xx *pkt;
2563         struct atio_from_isp *atio = &prm->cmd->atio;
2564         uint16_t temp;
2565
2566         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2567         prm->pkt = pkt;
2568         memset(pkt, 0, sizeof(*pkt));
2569
2570         pkt->entry_type = CTIO_TYPE7;
2571         pkt->entry_count = (uint8_t)prm->req_cnt;
2572         pkt->vp_index = prm->cmd->vp_idx;
2573
2574         h = qlt_make_handle(qpair);
2575         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2576                 /*
2577                  * CTIO type 7 from the firmware doesn't provide a way to
2578                  * know the initiator's LOOP ID, hence we can't find
2579                  * the session and, so, the command.
2580                  */
2581                 return -EAGAIN;
2582         } else
2583                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2584
2585         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2586         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2587         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2588         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2589         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2590         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2591         temp = atio->u.isp24.attr << 9;
2592         pkt->u.status0.flags |= cpu_to_le16(temp);
2593         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2594         pkt->u.status0.ox_id = cpu_to_le16(temp);
2595         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2596
2597         return 0;
2598 }
2599
2600 /*
2601  * ha->hardware_lock supposed to be held on entry. We have already made sure
2602  * that there is sufficient amount of request entries to not drop it.
2603  */
2604 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2605 {
2606         int cnt;
2607         struct dsd64 *cur_dsd;
2608
2609         /* Build continuation packets */
2610         while (prm->seg_cnt > 0) {
2611                 cont_a64_entry_t *cont_pkt64 =
2612                         (cont_a64_entry_t *)qlt_get_req_pkt(
2613                            prm->cmd->qpair->req);
2614
2615                 /*
2616                  * Make sure that from cont_pkt64 none of
2617                  * 64-bit specific fields used for 32-bit
2618                  * addressing. Cast to (cont_entry_t *) for
2619                  * that.
2620                  */
2621
2622                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2623
2624                 cont_pkt64->entry_count = 1;
2625                 cont_pkt64->sys_define = 0;
2626
2627                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2628                 cur_dsd = cont_pkt64->dsd;
2629
2630                 /* Load continuation entry data segments */
2631                 for (cnt = 0;
2632                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2633                     cnt++, prm->seg_cnt--) {
2634                         append_dsd64(&cur_dsd, prm->sg);
2635                         prm->sg = sg_next(prm->sg);
2636                 }
2637         }
2638 }
2639
2640 /*
2641  * ha->hardware_lock supposed to be held on entry. We have already made sure
2642  * that there is sufficient amount of request entries to not drop it.
2643  */
2644 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2645 {
2646         int cnt;
2647         struct dsd64 *cur_dsd;
2648         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2649
2650         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2651
2652         /* Setup packet address segment pointer */
2653         cur_dsd = &pkt24->u.status0.dsd;
2654
2655         /* Set total data segment count */
2656         if (prm->seg_cnt)
2657                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2658
2659         if (prm->seg_cnt == 0) {
2660                 /* No data transfer */
2661                 cur_dsd->address = 0;
2662                 cur_dsd->length = 0;
2663                 return;
2664         }
2665
2666         /* If scatter gather */
2667
2668         /* Load command entry data segments */
2669         for (cnt = 0;
2670             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2671             cnt++, prm->seg_cnt--) {
2672                 append_dsd64(&cur_dsd, prm->sg);
2673                 prm->sg = sg_next(prm->sg);
2674         }
2675
2676         qlt_load_cont_data_segments(prm);
2677 }
2678
2679 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2680 {
2681         return cmd->bufflen > 0;
2682 }
2683
2684 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2685 {
2686         struct qla_tgt_cmd *cmd;
2687         struct scsi_qla_host *vha;
2688
2689         /* asc 0x10=dif error */
2690         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2691                 cmd = prm->cmd;
2692                 vha = cmd->vha;
2693                 /* ASCQ */
2694                 switch (prm->sense_buffer[13]) {
2695                 case 1:
2696                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2697                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2698                             "se_cmd=%p tag[%x]",
2699                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2700                             cmd->atio.u.isp24.exchange_addr);
2701                         break;
2702                 case 2:
2703                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2704                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2705                             "se_cmd=%p tag[%x]",
2706                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2707                             cmd->atio.u.isp24.exchange_addr);
2708                         break;
2709                 case 3:
2710                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2711                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2712                             "se_cmd=%p tag[%x]",
2713                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2714                             cmd->atio.u.isp24.exchange_addr);
2715                         break;
2716                 default:
2717                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2718                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2719                             "se_cmd=%p tag[%x]",
2720                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2721                             cmd->atio.u.isp24.exchange_addr);
2722                         break;
2723                 }
2724                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2725         }
2726 }
2727
2728 /*
2729  * Called without ha->hardware_lock held
2730  */
2731 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2732         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2733         uint32_t *full_req_cnt)
2734 {
2735         struct se_cmd *se_cmd = &cmd->se_cmd;
2736         struct qla_qpair *qpair = cmd->qpair;
2737
2738         prm->cmd = cmd;
2739         prm->tgt = cmd->tgt;
2740         prm->pkt = NULL;
2741         prm->rq_result = scsi_status;
2742         prm->sense_buffer = &cmd->sense_buffer[0];
2743         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2744         prm->sg = NULL;
2745         prm->seg_cnt = -1;
2746         prm->req_cnt = 1;
2747         prm->residual = 0;
2748         prm->add_status_pkt = 0;
2749         prm->prot_sg = NULL;
2750         prm->prot_seg_cnt = 0;
2751         prm->tot_dsds = 0;
2752
2753         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2754                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2755                         return -EAGAIN;
2756         }
2757
2758         *full_req_cnt = prm->req_cnt;
2759
2760         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2761                 prm->residual = se_cmd->residual_count;
2762                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2763                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2764                        prm->residual, se_cmd->tag,
2765                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2766                        cmd->bufflen, prm->rq_result);
2767                 prm->rq_result |= SS_RESIDUAL_UNDER;
2768         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2769                 prm->residual = se_cmd->residual_count;
2770                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2771                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2772                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2773                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2774                 prm->rq_result |= SS_RESIDUAL_OVER;
2775         }
2776
2777         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2778                 /*
2779                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2780                  * ignored in *xmit_response() below
2781                  */
2782                 if (qlt_has_data(cmd)) {
2783                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2784                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2785                             (prm->rq_result != 0))) {
2786                                 prm->add_status_pkt = 1;
2787                                 (*full_req_cnt)++;
2788                         }
2789                 }
2790         }
2791
2792         return 0;
2793 }
2794
2795 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2796     int sending_sense)
2797 {
2798         if (cmd->qpair->enable_class_2)
2799                 return 0;
2800
2801         if (sending_sense)
2802                 return cmd->conf_compl_supported;
2803         else
2804                 return cmd->qpair->enable_explicit_conf &&
2805                     cmd->conf_compl_supported;
2806 }
2807
2808 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2809         struct qla_tgt_prm *prm)
2810 {
2811         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2812             (uint32_t)sizeof(ctio->u.status1.sense_data));
2813         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2814         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2815                 ctio->u.status0.flags |= cpu_to_le16(
2816                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2817                     CTIO7_FLAGS_CONFORM_REQ);
2818         }
2819         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2820         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2821         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2822                 int i;
2823
2824                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2825                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2826                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2827                                     "Skipping EXPLICIT_CONFORM and "
2828                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2829                                     "non GOOD status\n");
2830                                 goto skip_explict_conf;
2831                         }
2832                         ctio->u.status1.flags |= cpu_to_le16(
2833                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2834                             CTIO7_FLAGS_CONFORM_REQ);
2835                 }
2836 skip_explict_conf:
2837                 ctio->u.status1.flags &=
2838                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2839                 ctio->u.status1.flags |=
2840                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2841                 ctio->u.status1.scsi_status |=
2842                     cpu_to_le16(SS_SENSE_LEN_VALID);
2843                 ctio->u.status1.sense_length =
2844                     cpu_to_le16(prm->sense_buffer_len);
2845                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2846                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2847                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2848
2849                 qlt_print_dif_err(prm);
2850
2851         } else {
2852                 ctio->u.status1.flags &=
2853                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2854                 ctio->u.status1.flags |=
2855                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2856                 ctio->u.status1.sense_length = 0;
2857                 memset(ctio->u.status1.sense_data, 0,
2858                     sizeof(ctio->u.status1.sense_data));
2859         }
2860
2861         /* Sense with len > 24, is it possible ??? */
2862 }
2863
2864 static inline int
2865 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2866 {
2867         switch (se_cmd->prot_op) {
2868         case TARGET_PROT_DOUT_INSERT:
2869         case TARGET_PROT_DIN_STRIP:
2870                 if (ql2xenablehba_err_chk >= 1)
2871                         return 1;
2872                 break;
2873         case TARGET_PROT_DOUT_PASS:
2874         case TARGET_PROT_DIN_PASS:
2875                 if (ql2xenablehba_err_chk >= 2)
2876                         return 1;
2877                 break;
2878         case TARGET_PROT_DIN_INSERT:
2879         case TARGET_PROT_DOUT_STRIP:
2880                 return 1;
2881         default:
2882                 break;
2883         }
2884         return 0;
2885 }
2886
2887 static inline int
2888 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2889 {
2890         switch (se_cmd->prot_op) {
2891         case TARGET_PROT_DIN_INSERT:
2892         case TARGET_PROT_DOUT_INSERT:
2893         case TARGET_PROT_DIN_STRIP:
2894         case TARGET_PROT_DOUT_STRIP:
2895         case TARGET_PROT_DIN_PASS:
2896         case TARGET_PROT_DOUT_PASS:
2897             return 1;
2898         default:
2899             return 0;
2900         }
2901         return 0;
2902 }
2903
2904 /*
2905  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2906  */
2907 static void
2908 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2909     uint16_t *pfw_prot_opts)
2910 {
2911         struct se_cmd *se_cmd = &cmd->se_cmd;
2912         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2913         scsi_qla_host_t *vha = cmd->tgt->vha;
2914         struct qla_hw_data *ha = vha->hw;
2915         uint32_t t32 = 0;
2916
2917         /*
2918          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2919          * have been immplemented by TCM, before AppTag is avail.
2920          * Look for modesense_handlers[]
2921          */
2922         ctx->app_tag = 0;
2923         ctx->app_tag_mask[0] = 0x0;
2924         ctx->app_tag_mask[1] = 0x0;
2925
2926         if (IS_PI_UNINIT_CAPABLE(ha)) {
2927                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2928                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2929                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2930                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2931                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2932         }
2933
2934         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2935
2936         switch (se_cmd->prot_type) {
2937         case TARGET_DIF_TYPE0_PROT:
2938                 /*
2939                  * No check for ql2xenablehba_err_chk, as it
2940                  * would be an I/O error if hba tag generation
2941                  * is not done.
2942                  */
2943                 ctx->ref_tag = cpu_to_le32(lba);
2944                 /* enable ALL bytes of the ref tag */
2945                 ctx->ref_tag_mask[0] = 0xff;
2946                 ctx->ref_tag_mask[1] = 0xff;
2947                 ctx->ref_tag_mask[2] = 0xff;
2948                 ctx->ref_tag_mask[3] = 0xff;
2949                 break;
2950         case TARGET_DIF_TYPE1_PROT:
2951             /*
2952              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2953              * REF tag, and 16 bit app tag.
2954              */
2955             ctx->ref_tag = cpu_to_le32(lba);
2956             if (!qla_tgt_ref_mask_check(se_cmd) ||
2957                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2958                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2959                     break;
2960             }
2961             /* enable ALL bytes of the ref tag */
2962             ctx->ref_tag_mask[0] = 0xff;
2963             ctx->ref_tag_mask[1] = 0xff;
2964             ctx->ref_tag_mask[2] = 0xff;
2965             ctx->ref_tag_mask[3] = 0xff;
2966             break;
2967         case TARGET_DIF_TYPE2_PROT:
2968             /*
2969              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2970              * tag has to match LBA in CDB + N
2971              */
2972             ctx->ref_tag = cpu_to_le32(lba);
2973             if (!qla_tgt_ref_mask_check(se_cmd) ||
2974                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2975                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2976                     break;
2977             }
2978             /* enable ALL bytes of the ref tag */
2979             ctx->ref_tag_mask[0] = 0xff;
2980             ctx->ref_tag_mask[1] = 0xff;
2981             ctx->ref_tag_mask[2] = 0xff;
2982             ctx->ref_tag_mask[3] = 0xff;
2983             break;
2984         case TARGET_DIF_TYPE3_PROT:
2985             /* For TYPE 3 protection: 16 bit GUARD only */
2986             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2987             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2988                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2989             break;
2990         }
2991 }
2992
2993 static inline int
2994 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2995 {
2996         struct dsd64            *cur_dsd;
2997         uint32_t                transfer_length = 0;
2998         uint32_t                data_bytes;
2999         uint32_t                dif_bytes;
3000         uint8_t                 bundling = 1;
3001         struct crc_context      *crc_ctx_pkt = NULL;
3002         struct qla_hw_data      *ha;
3003         struct ctio_crc2_to_fw  *pkt;
3004         dma_addr_t              crc_ctx_dma;
3005         uint16_t                fw_prot_opts = 0;
3006         struct qla_tgt_cmd      *cmd = prm->cmd;
3007         struct se_cmd           *se_cmd = &cmd->se_cmd;
3008         uint32_t h;
3009         struct atio_from_isp *atio = &prm->cmd->atio;
3010         struct qla_tc_param     tc;
3011         uint16_t t16;
3012         scsi_qla_host_t *vha = cmd->vha;
3013
3014         ha = vha->hw;
3015
3016         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3017         prm->pkt = pkt;
3018         memset(pkt, 0, sizeof(*pkt));
3019
3020         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3021                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3022                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3023                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3024
3025         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3026             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3027                 bundling = 0;
3028
3029         /* Compute dif len and adjust data len to incude protection */
3030         data_bytes = cmd->bufflen;
3031         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3032
3033         switch (se_cmd->prot_op) {
3034         case TARGET_PROT_DIN_INSERT:
3035         case TARGET_PROT_DOUT_STRIP:
3036                 transfer_length = data_bytes;
3037                 if (cmd->prot_sg_cnt)
3038                         data_bytes += dif_bytes;
3039                 break;
3040         case TARGET_PROT_DIN_STRIP:
3041         case TARGET_PROT_DOUT_INSERT:
3042         case TARGET_PROT_DIN_PASS:
3043         case TARGET_PROT_DOUT_PASS:
3044                 transfer_length = data_bytes + dif_bytes;
3045                 break;
3046         default:
3047                 BUG();
3048                 break;
3049         }
3050
3051         if (!qlt_hba_err_chk_enabled(se_cmd))
3052                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3053         /* HBA error checking enabled */
3054         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3055                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3056                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3057                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3058                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3059                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3060         }
3061
3062         switch (se_cmd->prot_op) {
3063         case TARGET_PROT_DIN_INSERT:
3064         case TARGET_PROT_DOUT_INSERT:
3065                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3066                 break;
3067         case TARGET_PROT_DIN_STRIP:
3068         case TARGET_PROT_DOUT_STRIP:
3069                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3070                 break;
3071         case TARGET_PROT_DIN_PASS:
3072         case TARGET_PROT_DOUT_PASS:
3073                 fw_prot_opts |= PO_MODE_DIF_PASS;
3074                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3075                 break;
3076         default:/* Normal Request */
3077                 fw_prot_opts |= PO_MODE_DIF_PASS;
3078                 break;
3079         }
3080
3081         /* ---- PKT ---- */
3082         /* Update entry type to indicate Command Type CRC_2 IOCB */
3083         pkt->entry_type  = CTIO_CRC2;
3084         pkt->entry_count = 1;
3085         pkt->vp_index = cmd->vp_idx;
3086
3087         h = qlt_make_handle(qpair);
3088         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3089                 /*
3090                  * CTIO type 7 from the firmware doesn't provide a way to
3091                  * know the initiator's LOOP ID, hence we can't find
3092                  * the session and, so, the command.
3093                  */
3094                 return -EAGAIN;
3095         } else
3096                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3097
3098         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3099         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3100         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3101         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3102         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3103         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3104
3105         /* silence compile warning */
3106         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3107         pkt->ox_id  = cpu_to_le16(t16);
3108
3109         t16 = (atio->u.isp24.attr << 9);
3110         pkt->flags |= cpu_to_le16(t16);
3111         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3112
3113         /* Set transfer direction */
3114         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3115                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3116         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3117                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3118
3119         pkt->dseg_count = prm->tot_dsds;
3120         /* Fibre channel byte count */
3121         pkt->transfer_length = cpu_to_le32(transfer_length);
3122
3123         /* ----- CRC context -------- */
3124
3125         /* Allocate CRC context from global pool */
3126         crc_ctx_pkt = cmd->ctx =
3127             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3128
3129         if (!crc_ctx_pkt)
3130                 goto crc_queuing_error;
3131
3132         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3133         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3134
3135         /* Set handle */
3136         crc_ctx_pkt->handle = pkt->handle;
3137
3138         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3139
3140         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3141         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3142
3143         if (!bundling) {
3144                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3145         } else {
3146                 /*
3147                  * Configure Bundling if we need to fetch interlaving
3148                  * protection PCI accesses
3149                  */
3150                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3151                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3152                 crc_ctx_pkt->u.bundling.dseg_count =
3153                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3154                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3155         }
3156
3157         /* Finish the common fields of CRC pkt */
3158         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3159         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3160         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3161         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3162
3163         memset((uint8_t *)&tc, 0 , sizeof(tc));
3164         tc.vha = vha;
3165         tc.blk_sz = cmd->blk_sz;
3166         tc.bufflen = cmd->bufflen;
3167         tc.sg = cmd->sg;
3168         tc.prot_sg = cmd->prot_sg;
3169         tc.ctx = crc_ctx_pkt;
3170         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3171
3172         /* Walks data segments */
3173         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3174
3175         if (!bundling && prm->prot_seg_cnt) {
3176                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3177                         prm->tot_dsds, &tc))
3178                         goto crc_queuing_error;
3179         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3180                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3181                 goto crc_queuing_error;
3182
3183         if (bundling && prm->prot_seg_cnt) {
3184                 /* Walks dif segments */
3185                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3186
3187                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3188                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3189                         prm->prot_seg_cnt, cmd))
3190                         goto crc_queuing_error;
3191         }
3192         return QLA_SUCCESS;
3193
3194 crc_queuing_error:
3195         /* Cleanup will be performed by the caller */
3196         qpair->req->outstanding_cmds[h] = NULL;
3197
3198         return QLA_FUNCTION_FAILED;
3199 }
3200
3201 /*
3202  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3203  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3204  */
3205 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3206         uint8_t scsi_status)
3207 {
3208         struct scsi_qla_host *vha = cmd->vha;
3209         struct qla_qpair *qpair = cmd->qpair;
3210         struct ctio7_to_24xx *pkt;
3211         struct qla_tgt_prm prm;
3212         uint32_t full_req_cnt = 0;
3213         unsigned long flags = 0;
3214         int res;
3215
3216         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3217             (cmd->sess && cmd->sess->deleted)) {
3218                 cmd->state = QLA_TGT_STATE_PROCESSED;
3219                 res = 0;
3220                 goto free;
3221         }
3222
3223         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3224             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3225             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3226             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3227             &cmd->se_cmd, qpair->id);
3228
3229         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3230             &full_req_cnt);
3231         if (unlikely(res != 0))
3232                 goto free;
3233
3234         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3235
3236         if (xmit_type == QLA_TGT_XMIT_STATUS)
3237                 qpair->tgt_counters.core_qla_snd_status++;
3238         else
3239                 qpair->tgt_counters.core_qla_que_buf++;
3240
3241         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3242                 /*
3243                  * Either the port is not online or this request was from
3244                  * previous life, just abort the processing.
3245                  */
3246                 cmd->state = QLA_TGT_STATE_PROCESSED;
3247                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3248                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3249                         vha->flags.online, qla2x00_reset_active(vha),
3250                         cmd->reset_count, qpair->chip_reset);
3251                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3252                 res = 0;
3253                 goto free;
3254         }
3255
3256         /* Does F/W have an IOCBs for this request */
3257         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3258         if (unlikely(res))
3259                 goto out_unmap_unlock;
3260
3261         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3262                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3263         else
3264                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3265         if (unlikely(res != 0)) {
3266                 qpair->req->cnt += full_req_cnt;
3267                 goto out_unmap_unlock;
3268         }
3269
3270         pkt = (struct ctio7_to_24xx *)prm.pkt;
3271
3272         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3273                 pkt->u.status0.flags |=
3274                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3275                         CTIO7_FLAGS_STATUS_MODE_0);
3276
3277                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3278                         qlt_load_data_segments(&prm);
3279
3280                 if (prm.add_status_pkt == 0) {
3281                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3282                                 pkt->u.status0.scsi_status =
3283                                     cpu_to_le16(prm.rq_result);
3284                                 pkt->u.status0.residual =
3285                                     cpu_to_le32(prm.residual);
3286                                 pkt->u.status0.flags |= cpu_to_le16(
3287                                     CTIO7_FLAGS_SEND_STATUS);
3288                                 if (qlt_need_explicit_conf(cmd, 0)) {
3289                                         pkt->u.status0.flags |=
3290                                             cpu_to_le16(
3291                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3292                                                 CTIO7_FLAGS_CONFORM_REQ);
3293                                 }
3294                         }
3295
3296                 } else {
3297                         /*
3298                          * We have already made sure that there is sufficient
3299                          * amount of request entries to not drop HW lock in
3300                          * req_pkt().
3301                          */
3302                         struct ctio7_to_24xx *ctio =
3303                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3304                                     qpair->req);
3305
3306                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3307                             "Building additional status packet 0x%p.\n",
3308                             ctio);
3309
3310                         /*
3311                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3312                          * ctio7_to_24xx
3313                          */
3314                         memcpy(ctio, pkt, sizeof(*ctio));
3315                         /* reset back to CTIO7 */
3316                         ctio->entry_count = 1;
3317                         ctio->entry_type = CTIO_TYPE7;
3318                         ctio->dseg_count = 0;
3319                         ctio->u.status1.flags &= ~cpu_to_le16(
3320                             CTIO7_FLAGS_DATA_IN);
3321
3322                         /* Real finish is ctio_m1's finish */
3323                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3324                         pkt->u.status0.flags |= cpu_to_le16(
3325                             CTIO7_FLAGS_DONT_RET_CTIO);
3326
3327                         /* qlt_24xx_init_ctio_to_isp will correct
3328                          * all neccessary fields that's part of CTIO7.
3329                          * There should be no residual of CTIO-CRC2 data.
3330                          */
3331                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3332                             &prm);
3333                 }
3334         } else
3335                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3336
3337
3338         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3339         cmd->cmd_sent_to_fw = 1;
3340         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3341
3342         /* Memory Barrier */
3343         wmb();
3344         if (qpair->reqq_start_iocbs)
3345                 qpair->reqq_start_iocbs(qpair);
3346         else
3347                 qla2x00_start_iocbs(vha, qpair->req);
3348         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3349
3350         return 0;
3351
3352 out_unmap_unlock:
3353         qlt_unmap_sg(vha, cmd);
3354         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3355
3356 free:
3357         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3358         return res;
3359 }
3360 EXPORT_SYMBOL(qlt_xmit_response);
3361
3362 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3363 {
3364         struct ctio7_to_24xx *pkt;
3365         struct scsi_qla_host *vha = cmd->vha;
3366         struct qla_tgt *tgt = cmd->tgt;
3367         struct qla_tgt_prm prm;
3368         unsigned long flags = 0;
3369         int res = 0;
3370         struct qla_qpair *qpair = cmd->qpair;
3371
3372         memset(&prm, 0, sizeof(prm));
3373         prm.cmd = cmd;
3374         prm.tgt = tgt;
3375         prm.sg = NULL;
3376         prm.req_cnt = 1;
3377
3378         /* Calculate number of entries and segments required */
3379         if (qlt_pci_map_calc_cnt(&prm) != 0)
3380                 return -EAGAIN;
3381
3382         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3383             (cmd->sess && cmd->sess->deleted)) {
3384                 /*
3385                  * Either the port is not online or this request was from
3386                  * previous life, just abort the processing.
3387                  */
3388                 cmd->aborted = 1;
3389                 cmd->write_data_transferred = 0;
3390                 cmd->state = QLA_TGT_STATE_DATA_IN;
3391                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3392                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3393                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3394                         vha->flags.online, qla2x00_reset_active(vha),
3395                         cmd->reset_count, qpair->chip_reset);
3396                 return 0;
3397         }
3398
3399         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3400         /* Does F/W have an IOCBs for this request */
3401         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3402         if (res != 0)
3403                 goto out_unlock_free_unmap;
3404         if (cmd->se_cmd.prot_op)
3405                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3406         else
3407                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3408
3409         if (unlikely(res != 0)) {
3410                 qpair->req->cnt += prm.req_cnt;
3411                 goto out_unlock_free_unmap;
3412         }
3413
3414         pkt = (struct ctio7_to_24xx *)prm.pkt;
3415         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3416             CTIO7_FLAGS_STATUS_MODE_0);
3417
3418         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3419                 qlt_load_data_segments(&prm);
3420
3421         cmd->state = QLA_TGT_STATE_NEED_DATA;
3422         cmd->cmd_sent_to_fw = 1;
3423         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3424
3425         /* Memory Barrier */
3426         wmb();
3427         if (qpair->reqq_start_iocbs)
3428                 qpair->reqq_start_iocbs(qpair);
3429         else
3430                 qla2x00_start_iocbs(vha, qpair->req);
3431         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3432
3433         return res;
3434
3435 out_unlock_free_unmap:
3436         qlt_unmap_sg(vha, cmd);
3437         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3438
3439         return res;
3440 }
3441 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3442
3443
3444 /*
3445  * it is assumed either hardware_lock or qpair lock is held.
3446  */
3447 static void
3448 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3449         struct ctio_crc_from_fw *sts)
3450 {
3451         uint8_t         *ap = &sts->actual_dif[0];
3452         uint8_t         *ep = &sts->expected_dif[0];
3453         uint64_t        lba = cmd->se_cmd.t_task_lba;
3454         uint8_t scsi_status, sense_key, asc, ascq;
3455         unsigned long flags;
3456         struct scsi_qla_host *vha = cmd->vha;
3457
3458         cmd->trc_flags |= TRC_DIF_ERR;
3459
3460         cmd->a_guard   = get_unaligned_be16(ap + 0);
3461         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3462         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3463
3464         cmd->e_guard   = get_unaligned_be16(ep + 0);
3465         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3466         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3467
3468         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3469             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3470
3471         scsi_status = sense_key = asc = ascq = 0;
3472
3473         /* check appl tag */
3474         if (cmd->e_app_tag != cmd->a_app_tag) {
3475                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3476                     "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]",
3477                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3478                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3479                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3480                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3481
3482                 cmd->dif_err_code = DIF_ERR_APP;
3483                 scsi_status = SAM_STAT_CHECK_CONDITION;
3484                 sense_key = ABORTED_COMMAND;
3485                 asc = 0x10;
3486                 ascq = 0x2;
3487         }
3488
3489         /* check ref tag */
3490         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3491                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3492                     "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] ",
3493                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3494                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3495                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3496                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3497
3498                 cmd->dif_err_code = DIF_ERR_REF;
3499                 scsi_status = SAM_STAT_CHECK_CONDITION;
3500                 sense_key = ABORTED_COMMAND;
3501                 asc = 0x10;
3502                 ascq = 0x3;
3503                 goto out;
3504         }
3505
3506         /* check guard */
3507         if (cmd->e_guard != cmd->a_guard) {
3508                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3509                     "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]",
3510                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3511                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3512                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3513                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3514
3515                 cmd->dif_err_code = DIF_ERR_GRD;
3516                 scsi_status = SAM_STAT_CHECK_CONDITION;
3517                 sense_key = ABORTED_COMMAND;
3518                 asc = 0x10;
3519                 ascq = 0x1;
3520         }
3521 out:
3522         switch (cmd->state) {
3523         case QLA_TGT_STATE_NEED_DATA:
3524                 /* handle_data will load DIF error code  */
3525                 cmd->state = QLA_TGT_STATE_DATA_IN;
3526                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3527                 break;
3528         default:
3529                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3530                 if (cmd->aborted) {
3531                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3532                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3533                         break;
3534                 }
3535                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3536
3537                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3538                     ascq);
3539                 /* assume scsi status gets out on the wire.
3540                  * Will not wait for completion.
3541                  */
3542                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3543                 break;
3544         }
3545 }
3546
3547 /* If hardware_lock held on entry, might drop it, then reaquire */
3548 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3549 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3550         struct imm_ntfy_from_isp *ntfy)
3551 {
3552         struct nack_to_isp *nack;
3553         struct qla_hw_data *ha = vha->hw;
3554         request_t *pkt;
3555         int ret = 0;
3556
3557         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3558             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3559
3560         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3561         if (pkt == NULL) {
3562                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3563                     "qla_target(%d): %s failed: unable to allocate "
3564                     "request packet\n", vha->vp_idx, __func__);
3565                 return -ENOMEM;
3566         }
3567
3568         pkt->entry_type = NOTIFY_ACK_TYPE;
3569         pkt->entry_count = 1;
3570         pkt->handle = QLA_TGT_SKIP_HANDLE;
3571
3572         nack = (struct nack_to_isp *)pkt;
3573         nack->ox_id = ntfy->ox_id;
3574
3575         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3576         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3577                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3578                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3579         }
3580
3581         /* terminate */
3582         nack->u.isp24.flags |=
3583                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3584
3585         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3586         nack->u.isp24.status = ntfy->u.isp24.status;
3587         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3588         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3589         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3590         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3591         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3592         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3593
3594         qla2x00_start_iocbs(vha, vha->req);
3595         return ret;
3596 }
3597
3598 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3599         struct imm_ntfy_from_isp *imm, int ha_locked)
3600 {
3601         int rc;
3602
3603         WARN_ON_ONCE(!ha_locked);
3604         rc = __qlt_send_term_imm_notif(vha, imm);
3605         pr_debug("rc = %d\n", rc);
3606 }
3607
3608 /*
3609  * If hardware_lock held on entry, might drop it, then reaquire
3610  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3611  */
3612 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3613         struct qla_tgt_cmd *cmd,
3614         struct atio_from_isp *atio)
3615 {
3616         struct scsi_qla_host *vha = qpair->vha;
3617         struct ctio7_to_24xx *ctio24;
3618         struct qla_hw_data *ha = vha->hw;
3619         request_t *pkt;
3620         int ret = 0;
3621         uint16_t temp;
3622
3623         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3624
3625         if (cmd)
3626                 vha = cmd->vha;
3627
3628         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3629         if (pkt == NULL) {
3630                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3631                     "qla_target(%d): %s failed: unable to allocate "
3632                     "request packet\n", vha->vp_idx, __func__);
3633                 return -ENOMEM;
3634         }
3635
3636         if (cmd != NULL) {
3637                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3638                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3639                             "qla_target(%d): Terminating cmd %p with "
3640                             "incorrect state %d\n", vha->vp_idx, cmd,
3641                             cmd->state);
3642                 } else
3643                         ret = 1;
3644         }
3645
3646         qpair->tgt_counters.num_term_xchg_sent++;
3647         pkt->entry_count = 1;
3648         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3649
3650         ctio24 = (struct ctio7_to_24xx *)pkt;
3651         ctio24->entry_type = CTIO_TYPE7;
3652         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3653         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3654         ctio24->vp_index = vha->vp_idx;
3655         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3656         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3657         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3658                 CTIO7_FLAGS_TERMINATE;
3659         ctio24->u.status1.flags = cpu_to_le16(temp);
3660         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3661         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3662
3663         /* Memory Barrier */
3664         wmb();
3665         if (qpair->reqq_start_iocbs)
3666                 qpair->reqq_start_iocbs(qpair);
3667         else
3668                 qla2x00_start_iocbs(vha, qpair->req);
3669         return ret;
3670 }
3671
3672 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3673         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3674         int ul_abort)
3675 {
3676         struct scsi_qla_host *vha;
3677         unsigned long flags = 0;
3678         int rc;
3679
3680         /* why use different vha? NPIV */
3681         if (cmd)
3682                 vha = cmd->vha;
3683         else
3684                 vha = qpair->vha;
3685
3686         if (ha_locked) {
3687                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3688                 if (rc == -ENOMEM)
3689                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3690                 goto done;
3691         }
3692         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3693         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3694         if (rc == -ENOMEM)
3695                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3696
3697 done:
3698         if (cmd && !ul_abort && !cmd->aborted) {
3699                 if (cmd->sg_mapped)
3700                         qlt_unmap_sg(vha, cmd);
3701                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3702         }
3703
3704         if (!ha_locked)
3705                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3706
3707         return;
3708 }
3709
3710 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3711 {
3712         struct list_head free_list;
3713         struct qla_tgt_cmd *cmd, *tcmd;
3714
3715         vha->hw->tgt.leak_exchg_thresh_hold =
3716             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3717
3718         cmd = tcmd = NULL;
3719         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3720                 INIT_LIST_HEAD(&free_list);
3721                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3722
3723                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3724                         list_del(&cmd->cmd_list);
3725                         /* This cmd was never sent to TCM.  There is no need
3726                          * to schedule free or call free_cmd
3727                          */
3728                         qlt_free_cmd(cmd);
3729                         vha->hw->tgt.num_qfull_cmds_alloc--;
3730                 }
3731         }
3732         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3733 }
3734
3735 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3736 {
3737         uint32_t total_leaked;
3738
3739         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3740
3741         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3742             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3743
3744                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3745                     "Chip reset due to exchange starvation: %d/%d.\n",
3746                     total_leaked, vha->hw->cur_fw_xcb_count);
3747
3748                 if (IS_P3P_TYPE(vha->hw))
3749                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3750                 else
3751                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3752                 qla2xxx_wake_dpc(vha);
3753         }
3754
3755 }
3756
3757 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3758 {
3759         struct qla_tgt *tgt = cmd->tgt;
3760         struct scsi_qla_host *vha = tgt->vha;
3761         struct se_cmd *se_cmd = &cmd->se_cmd;
3762         unsigned long flags;
3763
3764         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3765             "qla_target(%d): terminating exchange for aborted cmd=%p "
3766             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3767             se_cmd->tag);
3768
3769         spin_lock_irqsave(&cmd->cmd_lock, flags);
3770         if (cmd->aborted) {
3771                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3772                 /*
3773                  * It's normal to see 2 calls in this path:
3774                  *  1) XFER Rdy completion + CMD_T_ABORT
3775                  *  2) TCM TMR - drain_state_list
3776                  */
3777                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3778                     "multiple abort. %p transport_state %x, t_state %x, "
3779                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3780                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3781                 return EIO;
3782         }
3783         cmd->aborted = 1;
3784         cmd->trc_flags |= TRC_ABORT;
3785         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3786
3787         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3788         return 0;
3789 }
3790 EXPORT_SYMBOL(qlt_abort_cmd);
3791
3792 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3793 {
3794         struct fc_port *sess = cmd->sess;
3795
3796         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3797             "%s: se_cmd[%p] ox_id %04x\n",
3798             __func__, &cmd->se_cmd,
3799             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3800
3801         BUG_ON(cmd->cmd_in_wq);
3802
3803         if (cmd->sg_mapped)
3804                 qlt_unmap_sg(cmd->vha, cmd);
3805
3806         if (!cmd->q_full)
3807                 qlt_decr_num_pend_cmds(cmd->vha);
3808
3809         BUG_ON(cmd->sg_mapped);
3810         cmd->jiffies_at_free = get_jiffies_64();
3811         if (unlikely(cmd->free_sg))
3812                 kfree(cmd->sg);
3813
3814         if (!sess || !sess->se_sess) {
3815                 WARN_ON(1);
3816                 return;
3817         }
3818         cmd->jiffies_at_free = get_jiffies_64();
3819         target_free_tag(sess->se_sess, &cmd->se_cmd);
3820 }
3821 EXPORT_SYMBOL(qlt_free_cmd);
3822
3823 /*
3824  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3825  */
3826 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3827         struct qla_tgt_cmd *cmd, uint32_t status)
3828 {
3829         int term = 0;
3830         struct scsi_qla_host *vha = qpair->vha;
3831
3832         if (cmd->se_cmd.prot_op)
3833                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3834                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3835                     "se_cmd=%p tag[%x] op %#x/%s",
3836                      cmd->lba, cmd->lba,
3837                      cmd->num_blks, &cmd->se_cmd,
3838                      cmd->atio.u.isp24.exchange_addr,
3839                      cmd->se_cmd.prot_op,
3840                      prot_op_str(cmd->se_cmd.prot_op));
3841
3842         if (ctio != NULL) {
3843                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3844
3845                 term = !(c->flags &
3846                     cpu_to_le16(OF_TERM_EXCH));
3847         } else
3848                 term = 1;
3849
3850         if (term)
3851                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3852
3853         return term;
3854 }
3855
3856
3857 /* ha->hardware_lock supposed to be held on entry */
3858 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3859         struct rsp_que *rsp, uint32_t handle, void *ctio)
3860 {
3861         void *cmd = NULL;
3862         struct req_que *req;
3863         int qid = GET_QID(handle);
3864         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3865
3866         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3867                 return NULL;
3868
3869         if (qid == rsp->req->id) {
3870                 req = rsp->req;
3871         } else if (vha->hw->req_q_map[qid]) {
3872                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3873                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3874                     vha->vp_idx, rsp->id, handle);
3875                 req = vha->hw->req_q_map[qid];
3876         } else {
3877                 return NULL;
3878         }
3879
3880         h &= QLA_CMD_HANDLE_MASK;
3881
3882         if (h != QLA_TGT_NULL_HANDLE) {
3883                 if (unlikely(h >= req->num_outstanding_cmds)) {
3884                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3885                             "qla_target(%d): Wrong handle %x received\n",
3886                             vha->vp_idx, handle);
3887                         return NULL;
3888                 }
3889
3890                 cmd = (void *) req->outstanding_cmds[h];
3891                 if (unlikely(cmd == NULL)) {
3892                         ql_dbg(ql_dbg_async, vha, 0xe053,
3893                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3894                                 vha->vp_idx, handle, req->id, rsp->id);
3895                         return NULL;
3896                 }
3897                 req->outstanding_cmds[h] = NULL;
3898         } else if (ctio != NULL) {
3899                 /* We can't get loop ID from CTIO7 */
3900                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3901                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3902                     "support NULL handles\n", vha->vp_idx);
3903                 return NULL;
3904         }
3905
3906         return cmd;
3907 }
3908
3909 /*
3910  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3911  */
3912 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3913     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3914 {
3915         struct qla_hw_data *ha = vha->hw;
3916         struct se_cmd *se_cmd;
3917         struct qla_tgt_cmd *cmd;
3918         struct qla_qpair *qpair = rsp->qpair;
3919
3920         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3921                 /* That could happen only in case of an error/reset/abort */
3922                 if (status != CTIO_SUCCESS) {
3923                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3924                             "Intermediate CTIO received"
3925                             " (status %x)\n", status);
3926                 }
3927                 return;
3928         }
3929
3930         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3931         if (cmd == NULL)
3932                 return;
3933
3934         se_cmd = &cmd->se_cmd;
3935         cmd->cmd_sent_to_fw = 0;
3936
3937         qlt_unmap_sg(vha, cmd);
3938
3939         if (unlikely(status != CTIO_SUCCESS)) {
3940                 switch (status & 0xFFFF) {
3941                 case CTIO_INVALID_RX_ID:
3942                         if (printk_ratelimit())
3943                                 dev_info(&vha->hw->pdev->dev,
3944                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
3945                                     vha->vp_idx, cmd->atio.u.isp24.attr,
3946                                     ((cmd->ctio_flags >> 9) & 0xf),
3947                                     cmd->ctio_flags);
3948
3949                         break;
3950                 case CTIO_LIP_RESET:
3951                 case CTIO_TARGET_RESET:
3952                 case CTIO_ABORTED:
3953                         /* driver request abort via Terminate exchange */
3954                 case CTIO_TIMEOUT:
3955                         /* They are OK */
3956                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3957                             "qla_target(%d): CTIO with "
3958                             "status %#x received, state %x, se_cmd %p, "
3959                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3960                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3961                             status, cmd->state, se_cmd);
3962                         break;
3963
3964                 case CTIO_PORT_LOGGED_OUT:
3965                 case CTIO_PORT_UNAVAILABLE:
3966                 {
3967                         int logged_out =
3968                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3969
3970                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3971                             "qla_target(%d): CTIO with %s status %x "
3972                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3973                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3974                             status, cmd->state, se_cmd);
3975
3976                         if (logged_out && cmd->sess) {
3977                                 /*
3978                                  * Session is already logged out, but we need
3979                                  * to notify initiator, who's not aware of this
3980                                  */
3981                                 cmd->sess->send_els_logo = 1;
3982                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3983                                     "%s %d %8phC post del sess\n",
3984                                     __func__, __LINE__, cmd->sess->port_name);
3985
3986                                 qlt_schedule_sess_for_deletion(cmd->sess);
3987                         }
3988                         break;
3989                 }
3990                 case CTIO_DIF_ERROR: {
3991                         struct ctio_crc_from_fw *crc =
3992                                 (struct ctio_crc_from_fw *)ctio;
3993                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3994                             "qla_target(%d): CTIO with DIF_ERROR status %x "
3995                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
3996                             "expect_dif[0x%llx]\n",
3997                             vha->vp_idx, status, cmd->state, se_cmd,
3998                             *((u64 *)&crc->actual_dif[0]),
3999                             *((u64 *)&crc->expected_dif[0]));
4000
4001                         qlt_handle_dif_error(qpair, cmd, ctio);
4002                         return;
4003                 }
4004                 default:
4005                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4006                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4007                             vha->vp_idx, status, cmd->state, se_cmd);
4008                         break;
4009                 }
4010
4011
4012                 /* "cmd->aborted" means
4013                  * cmd is already aborted/terminated, we don't
4014                  * need to terminate again.  The exchange is already
4015                  * cleaned up/freed at FW level.  Just cleanup at driver
4016                  * level.
4017                  */
4018                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4019                     (!cmd->aborted)) {
4020                         cmd->trc_flags |= TRC_CTIO_ERR;
4021                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4022                                 return;
4023                 }
4024         }
4025
4026         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4027                 cmd->trc_flags |= TRC_CTIO_DONE;
4028         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4029                 cmd->state = QLA_TGT_STATE_DATA_IN;
4030
4031                 if (status == CTIO_SUCCESS)
4032                         cmd->write_data_transferred = 1;
4033
4034                 ha->tgt.tgt_ops->handle_data(cmd);
4035                 return;
4036         } else if (cmd->aborted) {
4037                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4039                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4040         } else {
4041                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4042                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4043                     "qla_target(%d): A command in state (%d) should "
4044                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4045         }
4046
4047         if (unlikely(status != CTIO_SUCCESS) &&
4048                 !cmd->aborted) {
4049                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4050                 dump_stack();
4051         }
4052
4053         ha->tgt.tgt_ops->free_cmd(cmd);
4054 }
4055
4056 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4057         uint8_t task_codes)
4058 {
4059         int fcp_task_attr;
4060
4061         switch (task_codes) {
4062         case ATIO_SIMPLE_QUEUE:
4063                 fcp_task_attr = TCM_SIMPLE_TAG;
4064                 break;
4065         case ATIO_HEAD_OF_QUEUE:
4066                 fcp_task_attr = TCM_HEAD_TAG;
4067                 break;
4068         case ATIO_ORDERED_QUEUE:
4069                 fcp_task_attr = TCM_ORDERED_TAG;
4070                 break;
4071         case ATIO_ACA_QUEUE:
4072                 fcp_task_attr = TCM_ACA_TAG;
4073                 break;
4074         case ATIO_UNTAGGED:
4075                 fcp_task_attr = TCM_SIMPLE_TAG;
4076                 break;
4077         default:
4078                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4079                     "qla_target: unknown task code %x, use ORDERED instead\n",
4080                     task_codes);
4081                 fcp_task_attr = TCM_ORDERED_TAG;
4082                 break;
4083         }
4084
4085         return fcp_task_attr;
4086 }
4087
4088 /*
4089  * Process context for I/O path into tcm_qla2xxx code
4090  */
4091 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4092 {
4093         scsi_qla_host_t *vha = cmd->vha;
4094         struct qla_hw_data *ha = vha->hw;
4095         struct fc_port *sess = cmd->sess;
4096         struct atio_from_isp *atio = &cmd->atio;
4097         unsigned char *cdb;
4098         unsigned long flags;
4099         uint32_t data_length;
4100         int ret, fcp_task_attr, data_dir, bidi = 0;
4101         struct qla_qpair *qpair = cmd->qpair;
4102
4103         cmd->cmd_in_wq = 0;
4104         cmd->trc_flags |= TRC_DO_WORK;
4105
4106         if (cmd->aborted) {
4107                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4108                     "cmd with tag %u is aborted\n",
4109                     cmd->atio.u.isp24.exchange_addr);
4110                 goto out_term;
4111         }
4112
4113         spin_lock_init(&cmd->cmd_lock);
4114         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4115         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4116
4117         if (atio->u.isp24.fcp_cmnd.rddata &&
4118             atio->u.isp24.fcp_cmnd.wrdata) {
4119                 bidi = 1;
4120                 data_dir = DMA_TO_DEVICE;
4121         } else if (atio->u.isp24.fcp_cmnd.rddata)
4122                 data_dir = DMA_FROM_DEVICE;
4123         else if (atio->u.isp24.fcp_cmnd.wrdata)
4124                 data_dir = DMA_TO_DEVICE;
4125         else
4126                 data_dir = DMA_NONE;
4127
4128         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4129             atio->u.isp24.fcp_cmnd.task_attr);
4130         data_length = get_datalen_for_atio(atio);
4131
4132         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4133                                           fcp_task_attr, data_dir, bidi);
4134         if (ret != 0)
4135                 goto out_term;
4136         /*
4137          * Drop extra session reference from qlt_handle_cmd_for_atio().
4138          */
4139         ha->tgt.tgt_ops->put_sess(sess);
4140         return;
4141
4142 out_term:
4143         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4144         /*
4145          * cmd has not sent to target yet, so pass NULL as the second
4146          * argument to qlt_send_term_exchange() and free the memory here.
4147          */
4148         cmd->trc_flags |= TRC_DO_WORK_ERR;
4149         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4150         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4151
4152         qlt_decr_num_pend_cmds(vha);
4153         target_free_tag(sess->se_sess, &cmd->se_cmd);
4154         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4155
4156         ha->tgt.tgt_ops->put_sess(sess);
4157 }
4158
4159 static void qlt_do_work(struct work_struct *work)
4160 {
4161         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4162         scsi_qla_host_t *vha = cmd->vha;
4163         unsigned long flags;
4164
4165         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4166         list_del(&cmd->cmd_list);
4167         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4168
4169         __qlt_do_work(cmd);
4170 }
4171
4172 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4173 {
4174         unsigned long flags;
4175         struct qla_hw_data *ha = vha->hw;
4176         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4177         void *node;
4178         u64 key = 0;
4179
4180         ql_log(ql_log_info, vha, 0x706c,
4181             "User update Number of Active Qpairs %d\n",
4182             ha->tgt.num_act_qpairs);
4183
4184         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4185
4186         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4187                 btree_remove64(&tgt->lun_qpair_map, key);
4188
4189         ha->base_qpair->lun_cnt = 0;
4190         for (key = 0; key < ha->max_qpairs; key++)
4191                 if (ha->queue_pair_map[key])
4192                         ha->queue_pair_map[key]->lun_cnt = 0;
4193
4194         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4195 }
4196
4197 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4198         struct qla_tgt_cmd *cmd)
4199 {
4200         struct qla_qpair *qpair, *qp;
4201         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4202         struct qla_qpair_hint *h;
4203
4204         if (vha->flags.qpairs_available) {
4205                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4206                 if (unlikely(!h)) {
4207                         /* spread lun to qpair ratio evently */
4208                         int lcnt = 0, rc;
4209                         struct scsi_qla_host *base_vha =
4210                                 pci_get_drvdata(vha->hw->pdev);
4211
4212                         qpair = vha->hw->base_qpair;
4213                         if (qpair->lun_cnt == 0) {
4214                                 qpair->lun_cnt++;
4215                                 h = qla_qpair_to_hint(tgt, qpair);
4216                                 BUG_ON(!h);
4217                                 rc = btree_insert64(&tgt->lun_qpair_map,
4218                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4219                                 if (rc) {
4220                                         qpair->lun_cnt--;
4221                                         ql_log(ql_log_info, vha, 0xd037,
4222                                             "Unable to insert lun %llx into lun_qpair_map\n",
4223                                             cmd->unpacked_lun);
4224                                 }
4225                                 goto out;
4226                         } else {
4227                                 lcnt = qpair->lun_cnt;
4228                         }
4229
4230                         h = NULL;
4231                         list_for_each_entry(qp, &base_vha->qp_list,
4232                             qp_list_elem) {
4233                                 if (qp->lun_cnt == 0) {
4234                                         qp->lun_cnt++;
4235                                         h = qla_qpair_to_hint(tgt, qp);
4236                                         BUG_ON(!h);
4237                                         rc = btree_insert64(&tgt->lun_qpair_map,
4238                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4239                                         if (rc) {
4240                                                 qp->lun_cnt--;
4241                                                 ql_log(ql_log_info, vha, 0xd038,
4242                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4243                                                         cmd->unpacked_lun);
4244                                         }
4245                                         qpair = qp;
4246                                         goto out;
4247                                 } else {
4248                                         if (qp->lun_cnt < lcnt) {
4249                                                 lcnt = qp->lun_cnt;
4250                                                 qpair = qp;
4251                                                 continue;
4252                                         }
4253                                 }
4254                         }
4255                         BUG_ON(!qpair);
4256                         qpair->lun_cnt++;
4257                         h = qla_qpair_to_hint(tgt, qpair);
4258                         BUG_ON(!h);
4259                         rc = btree_insert64(&tgt->lun_qpair_map,
4260                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4261                         if (rc) {
4262                                 qpair->lun_cnt--;
4263                                 ql_log(ql_log_info, vha, 0xd039,
4264                                    "Unable to insert lun %llx into lun_qpair_map\n",
4265                                    cmd->unpacked_lun);
4266                         }
4267                 }
4268         } else {
4269                 h = &tgt->qphints[0];
4270         }
4271 out:
4272         cmd->qpair = h->qpair;
4273         cmd->se_cmd.cpuid = h->cpuid;
4274 }
4275
4276 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4277                                        struct fc_port *sess,
4278                                        struct atio_from_isp *atio)
4279 {
4280         struct se_session *se_sess = sess->se_sess;
4281         struct qla_tgt_cmd *cmd;
4282         int tag, cpu;
4283
4284         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4285         if (tag < 0)
4286                 return NULL;
4287
4288         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4289         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4290         cmd->cmd_type = TYPE_TGT_CMD;
4291         memcpy(&cmd->atio, atio, sizeof(*atio));
4292         cmd->state = QLA_TGT_STATE_NEW;
4293         cmd->tgt = vha->vha_tgt.qla_tgt;
4294         qlt_incr_num_pend_cmds(vha);
4295         cmd->vha = vha;
4296         cmd->se_cmd.map_tag = tag;
4297         cmd->se_cmd.map_cpu = cpu;
4298         cmd->sess = sess;
4299         cmd->loop_id = sess->loop_id;
4300         cmd->conf_compl_supported = sess->conf_compl_supported;
4301
4302         cmd->trc_flags = 0;
4303         cmd->jiffies_at_alloc = get_jiffies_64();
4304
4305         cmd->unpacked_lun = scsilun_to_int(
4306             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4307         qlt_assign_qpair(vha, cmd);
4308         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4309         cmd->vp_idx = vha->vp_idx;
4310
4311         return cmd;
4312 }
4313
4314 /* ha->hardware_lock supposed to be held on entry */
4315 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4316         struct atio_from_isp *atio)
4317 {
4318         struct qla_hw_data *ha = vha->hw;
4319         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4320         struct fc_port *sess;
4321         struct qla_tgt_cmd *cmd;
4322         unsigned long flags;
4323         port_id_t id;
4324
4325         if (unlikely(tgt->tgt_stop)) {
4326                 ql_dbg(ql_dbg_io, vha, 0x3061,
4327                     "New command while device %p is shutting down\n", tgt);
4328                 return -ENODEV;
4329         }
4330
4331         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4332         if (IS_SW_RESV_ADDR(id))
4333                 return -EBUSY;
4334
4335         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4336         if (unlikely(!sess))
4337                 return -EFAULT;
4338
4339         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4340          * session deletion, but it's still in sess_del_work wq */
4341         if (sess->deleted) {
4342                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4343                     "New command while old session %p is being deleted\n",
4344                     sess);
4345                 return -EFAULT;
4346         }
4347
4348         /*
4349          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4350          */
4351         if (!kref_get_unless_zero(&sess->sess_kref)) {
4352                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4353                     "%s: kref_get fail, %8phC oxid %x \n",
4354                     __func__, sess->port_name,
4355                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4356                 return -EFAULT;
4357         }
4358
4359         cmd = qlt_get_tag(vha, sess, atio);
4360         if (!cmd) {
4361                 ql_dbg(ql_dbg_io, vha, 0x3062,
4362                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4363                 ha->tgt.tgt_ops->put_sess(sess);
4364                 return -EBUSY;
4365         }
4366
4367         cmd->cmd_in_wq = 1;
4368         cmd->trc_flags |= TRC_NEW_CMD;
4369
4370         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4371         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4372         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4373
4374         INIT_WORK(&cmd->work, qlt_do_work);
4375         if (vha->flags.qpairs_available) {
4376                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4377         } else if (ha->msix_count) {
4378                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4379                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4380                             &cmd->work);
4381                 else
4382                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4383                             &cmd->work);
4384         } else {
4385                 queue_work(qla_tgt_wq, &cmd->work);
4386         }
4387
4388         return 0;
4389 }
4390
4391 /* ha->hardware_lock supposed to be held on entry */
4392 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4393         int fn, void *iocb, int flags)
4394 {
4395         struct scsi_qla_host *vha = sess->vha;
4396         struct qla_hw_data *ha = vha->hw;
4397         struct qla_tgt_mgmt_cmd *mcmd;
4398         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4399         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4400
4401         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4402         if (!mcmd) {
4403                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4404                     "qla_target(%d): Allocation of management "
4405                     "command failed, some commands and their data could "
4406                     "leak\n", vha->vp_idx);
4407                 return -ENOMEM;
4408         }
4409         memset(mcmd, 0, sizeof(*mcmd));
4410         mcmd->sess = sess;
4411
4412         if (iocb) {
4413                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4414                     sizeof(mcmd->orig_iocb.imm_ntfy));
4415         }
4416         mcmd->tmr_func = fn;
4417         mcmd->flags = flags;
4418         mcmd->reset_count = ha->base_qpair->chip_reset;
4419         mcmd->qpair = h->qpair;
4420         mcmd->vha = vha;
4421         mcmd->se_cmd.cpuid = h->cpuid;
4422         mcmd->unpacked_lun = lun;
4423
4424         switch (fn) {
4425         case QLA_TGT_LUN_RESET:
4426         case QLA_TGT_CLEAR_TS:
4427         case QLA_TGT_ABORT_TS:
4428                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4429                 /* fall through */
4430         case QLA_TGT_CLEAR_ACA:
4431                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4432                 mcmd->qpair = h->qpair;
4433                 mcmd->se_cmd.cpuid = h->cpuid;
4434                 break;
4435
4436         case QLA_TGT_TARGET_RESET:
4437         case QLA_TGT_NEXUS_LOSS_SESS:
4438         case QLA_TGT_NEXUS_LOSS:
4439         case QLA_TGT_ABORT_ALL:
4440         default:
4441                 /* no-op */
4442                 break;
4443         }
4444
4445         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4446         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4447             &mcmd->work);
4448
4449         return 0;
4450 }
4451
4452 /* ha->hardware_lock supposed to be held on entry */
4453 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4454 {
4455         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4456         struct qla_hw_data *ha = vha->hw;
4457         struct fc_port *sess;
4458         u64 unpacked_lun;
4459         int fn;
4460         unsigned long flags;
4461
4462         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4463
4464         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4465         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4466             a->u.isp24.fcp_hdr.s_id);
4467         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4468
4469         unpacked_lun =
4470             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4471
4472         if (sess == NULL || sess->deleted)
4473                 return -EFAULT;
4474
4475         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4476 }
4477
4478 /* ha->hardware_lock supposed to be held on entry */
4479 static int __qlt_abort_task(struct scsi_qla_host *vha,
4480         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4481 {
4482         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4483         struct qla_hw_data *ha = vha->hw;
4484         struct qla_tgt_mgmt_cmd *mcmd;
4485         u64 unpacked_lun;
4486         int rc;
4487
4488         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4489         if (mcmd == NULL) {
4490                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4491                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4492                     vha->vp_idx, __func__);
4493                 return -ENOMEM;
4494         }
4495         memset(mcmd, 0, sizeof(*mcmd));
4496
4497         mcmd->sess = sess;
4498         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4499             sizeof(mcmd->orig_iocb.imm_ntfy));
4500
4501         unpacked_lun =
4502             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4503         mcmd->reset_count = ha->base_qpair->chip_reset;
4504         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4505         mcmd->qpair = ha->base_qpair;
4506
4507         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4508             le16_to_cpu(iocb->u.isp2x.seq_id));
4509         if (rc != 0) {
4510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4511                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4512                     vha->vp_idx, rc);
4513                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4514                 return -EFAULT;
4515         }
4516
4517         return 0;
4518 }
4519
4520 /* ha->hardware_lock supposed to be held on entry */
4521 static int qlt_abort_task(struct scsi_qla_host *vha,
4522         struct imm_ntfy_from_isp *iocb)
4523 {
4524         struct qla_hw_data *ha = vha->hw;
4525         struct fc_port *sess;
4526         int loop_id;
4527         unsigned long flags;
4528
4529         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4530
4531         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4532         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4533         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4534
4535         if (sess == NULL) {
4536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4537                     "qla_target(%d): task abort for unexisting "
4538                     "session\n", vha->vp_idx);
4539                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4540                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4541         }
4542
4543         return __qlt_abort_task(vha, iocb, sess);
4544 }
4545
4546 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4547 {
4548         if (rc != MBS_COMMAND_COMPLETE) {
4549                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4550                         "%s: se_sess %p / sess %p from"
4551                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4552                         " LOGO failed: %#x\n",
4553                         __func__,
4554                         fcport->se_sess,
4555                         fcport,
4556                         fcport->port_name, fcport->loop_id,
4557                         fcport->d_id.b.domain, fcport->d_id.b.area,
4558                         fcport->d_id.b.al_pa, rc);
4559         }
4560
4561         fcport->logout_completed = 1;
4562 }
4563
4564 /*
4565 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4566 *
4567 * Schedules sessions with matching port_id/loop_id but different wwn for
4568 * deletion. Returns existing session with matching wwn if present.
4569 * Null otherwise.
4570 */
4571 struct fc_port *
4572 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4573     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4574 {
4575         struct fc_port *sess = NULL, *other_sess;
4576         uint64_t other_wwn;
4577
4578         *conflict_sess = NULL;
4579
4580         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4581
4582                 other_wwn = wwn_to_u64(other_sess->port_name);
4583
4584                 if (wwn == other_wwn) {
4585                         WARN_ON(sess);
4586                         sess = other_sess;
4587                         continue;
4588                 }
4589
4590                 /* find other sess with nport_id collision */
4591                 if (port_id.b24 == other_sess->d_id.b24) {
4592                         if (loop_id != other_sess->loop_id) {
4593                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4594                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4595                                     other_sess, other_sess->loop_id, other_wwn);
4596
4597                                 /*
4598                                  * logout_on_delete is set by default, but another
4599                                  * session that has the same s_id/loop_id combo
4600                                  * might have cleared it when requested this session
4601                                  * deletion, so don't touch it
4602                                  */
4603                                 qlt_schedule_sess_for_deletion(other_sess);
4604                         } else {
4605                                 /*
4606                                  * Another wwn used to have our s_id/loop_id
4607                                  * kill the session, but don't free the loop_id
4608                                  */
4609                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4610                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4611                                     other_sess, other_sess->loop_id, other_wwn);
4612
4613                                 other_sess->keep_nport_handle = 1;
4614                                 if (other_sess->disc_state != DSC_DELETED)
4615                                         *conflict_sess = other_sess;
4616                                 qlt_schedule_sess_for_deletion(other_sess);
4617                         }
4618                         continue;
4619                 }
4620
4621                 /* find other sess with nport handle collision */
4622                 if ((loop_id == other_sess->loop_id) &&
4623                         (loop_id != FC_NO_LOOP_ID)) {
4624                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4625                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4626                                other_sess, other_sess->loop_id, other_wwn);
4627
4628                         /* Same loop_id but different s_id
4629                          * Ok to kill and logout */
4630                         qlt_schedule_sess_for_deletion(other_sess);
4631                 }
4632         }
4633
4634         return sess;
4635 }
4636
4637 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4638 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4639 {
4640         struct qla_tgt_sess_op *op;
4641         struct qla_tgt_cmd *cmd;
4642         uint32_t key;
4643         int count = 0;
4644         unsigned long flags;
4645
4646         key = (((u32)s_id->b.domain << 16) |
4647                ((u32)s_id->b.area   <<  8) |
4648                ((u32)s_id->b.al_pa));
4649
4650         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4651         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4652                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4653
4654                 if (op_key == key) {
4655                         op->aborted = true;
4656                         count++;
4657                 }
4658         }
4659
4660         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4661                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4662
4663                 if (op_key == key) {
4664                         op->aborted = true;
4665                         count++;
4666                 }
4667         }
4668
4669         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4670                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4671
4672                 if (cmd_key == key) {
4673                         cmd->aborted = 1;
4674                         count++;
4675                 }
4676         }
4677         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4678
4679         return count;
4680 }
4681
4682 static int qlt_handle_login(struct scsi_qla_host *vha,
4683     struct imm_ntfy_from_isp *iocb)
4684 {
4685         struct fc_port *sess = NULL, *conflict_sess = NULL;
4686         uint64_t wwn;
4687         port_id_t port_id;
4688         uint16_t loop_id, wd3_lo;
4689         int res = 0;
4690         struct qlt_plogi_ack_t *pla;
4691         unsigned long flags;
4692
4693         lockdep_assert_held(&vha->hw->hardware_lock);
4694
4695         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4696
4697         port_id.b.domain = iocb->u.isp24.port_id[2];
4698         port_id.b.area   = iocb->u.isp24.port_id[1];
4699         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4700         port_id.b.rsvd_1 = 0;
4701
4702         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4703
4704         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4705         abort_cmds_for_s_id(vha, &port_id);
4706
4707         if (wwn) {
4708                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4709                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4710                     port_id, loop_id, &conflict_sess);
4711                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4712         } else {
4713                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4714                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4715                     __func__, __LINE__, loop_id, port_id.b24);
4716                 qlt_send_term_imm_notif(vha, iocb, 1);
4717                 goto out;
4718         }
4719
4720         if (IS_SW_RESV_ADDR(port_id)) {
4721                 res = 1;
4722                 goto out;
4723         }
4724
4725         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4726         if (!pla) {
4727                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4728                     "%s %d %8phC Term INOT due to mem alloc fail",
4729                     __func__, __LINE__,
4730                     iocb->u.isp24.port_name);
4731                 qlt_send_term_imm_notif(vha, iocb, 1);
4732                 goto out;
4733         }
4734
4735         if (conflict_sess) {
4736                 conflict_sess->login_gen++;
4737                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4738                     QLT_PLOGI_LINK_CONFLICT);
4739         }
4740
4741         if (!sess) {
4742                 pla->ref_count++;
4743                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4744                     "%s %d %8phC post new sess\n",
4745                     __func__, __LINE__, iocb->u.isp24.port_name);
4746                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4747                         qla24xx_post_newsess_work(vha, &port_id,
4748                             iocb->u.isp24.port_name,
4749                             iocb->u.isp24.u.plogi.node_name,
4750                             pla, FC4_TYPE_UNKNOWN);
4751                 else
4752                         qla24xx_post_newsess_work(vha, &port_id,
4753                             iocb->u.isp24.port_name, NULL,
4754                             pla, FC4_TYPE_UNKNOWN);
4755
4756                 goto out;
4757         }
4758
4759         if (sess->disc_state == DSC_UPD_FCPORT) {
4760                 u16 sec;
4761
4762                 /*
4763                  * Remote port registration is still going on from
4764                  * previous login. Allow it to finish before we
4765                  * accept the new login.
4766                  */
4767                 sess->next_disc_state = DSC_DELETE_PEND;
4768                 sec = jiffies_to_msecs(jiffies -
4769                     sess->jiffies_at_registration) / 1000;
4770                 if (sess->sec_since_registration < sec && sec &&
4771                     !(sec % 5)) {
4772                         sess->sec_since_registration = sec;
4773                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4774                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4775                             __func__, sess->port_name, sec);
4776                 }
4777
4778                 if (!conflict_sess) {
4779                         list_del(&pla->list);
4780                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4781                 }
4782
4783                 qlt_send_term_imm_notif(vha, iocb, 1);
4784                 goto out;
4785         }
4786
4787         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4788         sess->d_id = port_id;
4789         sess->login_gen++;
4790
4791         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4792                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4793                 sess->local = 0;
4794                 sess->loop_id = loop_id;
4795                 sess->d_id = port_id;
4796                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4797                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4798
4799                 if (wd3_lo & BIT_7)
4800                         sess->conf_compl_supported = 1;
4801
4802                 if ((wd3_lo & BIT_4) == 0)
4803                         sess->port_type = FCT_INITIATOR;
4804                 else
4805                         sess->port_type = FCT_TARGET;
4806
4807         } else
4808                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4809
4810
4811         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4812             "%s %d %8phC  DS %d\n",
4813             __func__, __LINE__, sess->port_name, sess->disc_state);
4814
4815         switch (sess->disc_state) {
4816         case DSC_DELETED:
4817         case DSC_LOGIN_PEND:
4818                 qlt_plogi_ack_unref(vha, pla);
4819                 break;
4820
4821         default:
4822                 /*
4823                  * Under normal circumstances we want to release nport handle
4824                  * during LOGO process to avoid nport handle leaks inside FW.
4825                  * The exception is when LOGO is done while another PLOGI with
4826                  * the same nport handle is waiting as might be the case here.
4827                  * Note: there is always a possibily of a race where session
4828                  * deletion has already started for other reasons (e.g. ACL
4829                  * removal) and now PLOGI arrives:
4830                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4831                  *    FW must have assigned this PLOGI a new/same handle and we
4832                  *    can proceed ACK'ing it as usual when session deletion
4833                  *    completes.
4834                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4835                  *    bit reached it, the handle has now been released. We'll
4836                  *    get an error when we ACK this PLOGI. Nothing will be sent
4837                  *    back to initiator. Initiator should eventually retry
4838                  *    PLOGI and situation will correct itself.
4839                  */
4840                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4841                     (sess->d_id.b24 == port_id.b24));
4842
4843                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4844                     "%s %d %8phC post del sess\n",
4845                     __func__, __LINE__, sess->port_name);
4846
4847
4848                 qlt_schedule_sess_for_deletion(sess);
4849                 break;
4850         }
4851 out:
4852         return res;
4853 }
4854
4855 /*
4856  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4857  */
4858 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4859         struct imm_ntfy_from_isp *iocb)
4860 {
4861         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4862         struct qla_hw_data *ha = vha->hw;
4863         struct fc_port *sess = NULL, *conflict_sess = NULL;
4864         uint64_t wwn;
4865         port_id_t port_id;
4866         uint16_t loop_id;
4867         uint16_t wd3_lo;
4868         int res = 0;
4869         unsigned long flags;
4870
4871         lockdep_assert_held(&ha->hardware_lock);
4872
4873         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4874
4875         port_id.b.domain = iocb->u.isp24.port_id[2];
4876         port_id.b.area   = iocb->u.isp24.port_id[1];
4877         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4878         port_id.b.rsvd_1 = 0;
4879
4880         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4881
4882         ql_dbg(ql_dbg_disc, vha, 0xf026,
4883             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4884             vha->vp_idx, iocb->u.isp24.port_id[2],
4885                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4886                    iocb->u.isp24.status_subcode, loop_id,
4887                 iocb->u.isp24.port_name);
4888
4889         /* res = 1 means ack at the end of thread
4890          * res = 0 means ack async/later.
4891          */
4892         switch (iocb->u.isp24.status_subcode) {
4893         case ELS_PLOGI:
4894                 res = qlt_handle_login(vha, iocb);
4895                 break;
4896
4897         case ELS_PRLI:
4898                 if (N2N_TOPO(ha)) {
4899                         sess = qla2x00_find_fcport_by_wwpn(vha,
4900                             iocb->u.isp24.port_name, 1);
4901
4902                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4903                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4904                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4905                                     __func__, __LINE__,
4906                                     iocb->u.isp24.port_name);
4907                                 qlt_send_term_imm_notif(vha, iocb, 1);
4908                                 break;
4909                         }
4910
4911                         res = qlt_handle_login(vha, iocb);
4912                         break;
4913                 }
4914
4915                 if (IS_SW_RESV_ADDR(port_id)) {
4916                         res = 1;
4917                         break;
4918                 }
4919
4920                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4921
4922                 if (wwn) {
4923                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4924                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4925                                 loop_id, &conflict_sess);
4926                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4927                 }
4928
4929                 if (conflict_sess) {
4930                         switch (conflict_sess->disc_state) {
4931                         case DSC_DELETED:
4932                         case DSC_DELETE_PEND:
4933                                 break;
4934                         default:
4935                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4936                                     "PRLI with conflicting sess %p port %8phC\n",
4937                                     conflict_sess, conflict_sess->port_name);
4938                                 conflict_sess->fw_login_state =
4939                                     DSC_LS_PORT_UNAVAIL;
4940                                 qlt_send_term_imm_notif(vha, iocb, 1);
4941                                 res = 0;
4942                                 break;
4943                         }
4944                 }
4945
4946                 if (sess != NULL) {
4947                         bool delete = false;
4948                         int sec;
4949
4950                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4951                         switch (sess->fw_login_state) {
4952                         case DSC_LS_PLOGI_PEND:
4953                         case DSC_LS_PLOGI_COMP:
4954                         case DSC_LS_PRLI_COMP:
4955                                 break;
4956                         default:
4957                                 delete = true;
4958                                 break;
4959                         }
4960
4961                         switch (sess->disc_state) {
4962                         case DSC_UPD_FCPORT:
4963                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4964                                     flags);
4965
4966                                 sec = jiffies_to_msecs(jiffies -
4967                                     sess->jiffies_at_registration)/1000;
4968                                 if (sess->sec_since_registration < sec && sec &&
4969                                     !(sec % 5)) {
4970                                         sess->sec_since_registration = sec;
4971                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4972                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4973                                             __func__, sess->port_name, sec);
4974                                 }
4975                                 qlt_send_term_imm_notif(vha, iocb, 1);
4976                                 return 0;
4977
4978                         case DSC_LOGIN_PEND:
4979                         case DSC_GPDB:
4980                         case DSC_LOGIN_COMPLETE:
4981                         case DSC_ADISC:
4982                                 delete = false;
4983                                 break;
4984                         default:
4985                                 break;
4986                         }
4987
4988                         if (delete) {
4989                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4990                                     flags);
4991                                 /*
4992                                  * Impatient initiator sent PRLI before last
4993                                  * PLOGI could finish. Will force him to re-try,
4994                                  * while last one finishes.
4995                                  */
4996                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4997                                     "sess %p PRLI received, before plogi ack.\n",
4998                                     sess);
4999                                 qlt_send_term_imm_notif(vha, iocb, 1);
5000                                 res = 0;
5001                                 break;
5002                         }
5003
5004                         /*
5005                          * This shouldn't happen under normal circumstances,
5006                          * since we have deleted the old session during PLOGI
5007                          */
5008                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5009                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5010                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5011
5012                         sess->local = 0;
5013                         sess->loop_id = loop_id;
5014                         sess->d_id = port_id;
5015                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5016
5017                         if (wd3_lo & BIT_7)
5018                                 sess->conf_compl_supported = 1;
5019
5020                         if ((wd3_lo & BIT_4) == 0)
5021                                 sess->port_type = FCT_INITIATOR;
5022                         else
5023                                 sess->port_type = FCT_TARGET;
5024
5025                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5026                 }
5027                 res = 1; /* send notify ack */
5028
5029                 /* Make session global (not used in fabric mode) */
5030                 if (ha->current_topology != ISP_CFG_F) {
5031                         if (sess) {
5032                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5033                                     "%s %d %8phC post nack\n",
5034                                     __func__, __LINE__, sess->port_name);
5035                                 qla24xx_post_nack_work(vha, sess, iocb,
5036                                         SRB_NACK_PRLI);
5037                                 res = 0;
5038                         } else {
5039                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5040                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5041                                 qla2xxx_wake_dpc(vha);
5042                         }
5043                 } else {
5044                         if (sess) {
5045                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5046                                     "%s %d %8phC post nack\n",
5047                                     __func__, __LINE__, sess->port_name);
5048                                 qla24xx_post_nack_work(vha, sess, iocb,
5049                                         SRB_NACK_PRLI);
5050                                 res = 0;
5051                         }
5052                 }
5053                 break;
5054
5055         case ELS_TPRLO:
5056                 if (le16_to_cpu(iocb->u.isp24.flags) &
5057                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5058                         loop_id = 0xFFFF;
5059                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5060                         res = 1;
5061                         break;
5062                 }
5063                 /* fall through */
5064         case ELS_LOGO:
5065         case ELS_PRLO:
5066                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5067                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5068                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5069
5070                 if (sess) {
5071                         sess->login_gen++;
5072                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5073                         sess->logo_ack_needed = 1;
5074                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5075                 }
5076
5077                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5078
5079                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5080                     "%s: logo %llx res %d sess %p ",
5081                     __func__, wwn, res, sess);
5082                 if (res == 0) {
5083                         /*
5084                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5085                          * for LOGO_ACK & sess delete
5086                          */
5087                         BUG_ON(!sess);
5088                         res = 0;
5089                 } else {
5090                         /* cmd did not go to upper layer. */
5091                         if (sess) {
5092                                 qlt_schedule_sess_for_deletion(sess);
5093                                 res = 0;
5094                         }
5095                         /* else logo will be ack */
5096                 }
5097                 break;
5098         case ELS_PDISC:
5099         case ELS_ADISC:
5100         {
5101                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5102
5103                 if (tgt->link_reinit_iocb_pending) {
5104                         qlt_send_notify_ack(ha->base_qpair,
5105                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5106                         tgt->link_reinit_iocb_pending = 0;
5107                 }
5108
5109                 sess = qla2x00_find_fcport_by_wwpn(vha,
5110                     iocb->u.isp24.port_name, 1);
5111                 if (sess) {
5112                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5113                                 "sess %p lid %d|%d DS %d LS %d\n",
5114                                 sess, sess->loop_id, loop_id,
5115                                 sess->disc_state, sess->fw_login_state);
5116                 }
5117
5118                 res = 1; /* send notify ack */
5119                 break;
5120         }
5121
5122         case ELS_FLOGI: /* should never happen */
5123         default:
5124                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5125                     "qla_target(%d): Unsupported ELS command %x "
5126                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5127                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5128                 break;
5129         }
5130
5131         ql_dbg(ql_dbg_disc, vha, 0xf026,
5132             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5133             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5134
5135         return res;
5136 }
5137
5138 /*
5139  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5140  */
5141 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5142         struct imm_ntfy_from_isp *iocb)
5143 {
5144         struct qla_hw_data *ha = vha->hw;
5145         uint32_t add_flags = 0;
5146         int send_notify_ack = 1;
5147         uint16_t status;
5148
5149         lockdep_assert_held(&ha->hardware_lock);
5150
5151         status = le16_to_cpu(iocb->u.isp2x.status);
5152         switch (status) {
5153         case IMM_NTFY_LIP_RESET:
5154         {
5155                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5156                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5157                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5158                     iocb->u.isp24.status_subcode);
5159
5160                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5161                         send_notify_ack = 0;
5162                 break;
5163         }
5164
5165         case IMM_NTFY_LIP_LINK_REINIT:
5166         {
5167                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5168
5169                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5170                     "qla_target(%d): LINK REINIT (loop %#x, "
5171                     "subcode %x)\n", vha->vp_idx,
5172                     le16_to_cpu(iocb->u.isp24.nport_handle),
5173                     iocb->u.isp24.status_subcode);
5174                 if (tgt->link_reinit_iocb_pending) {
5175                         qlt_send_notify_ack(ha->base_qpair,
5176                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5177                 }
5178                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5179                 tgt->link_reinit_iocb_pending = 1;
5180                 /*
5181                  * QLogic requires to wait after LINK REINIT for possible
5182                  * PDISC or ADISC ELS commands
5183                  */
5184                 send_notify_ack = 0;
5185                 break;
5186         }
5187
5188         case IMM_NTFY_PORT_LOGOUT:
5189                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5190                     "qla_target(%d): Port logout (loop "
5191                     "%#x, subcode %x)\n", vha->vp_idx,
5192                     le16_to_cpu(iocb->u.isp24.nport_handle),
5193                     iocb->u.isp24.status_subcode);
5194
5195                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5196                         send_notify_ack = 0;
5197                 /* The sessions will be cleared in the callback, if needed */
5198                 break;
5199
5200         case IMM_NTFY_GLBL_TPRLO:
5201                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5202                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5203                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5204                         send_notify_ack = 0;
5205                 /* The sessions will be cleared in the callback, if needed */
5206                 break;
5207
5208         case IMM_NTFY_PORT_CONFIG:
5209                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5210                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5211                     status);
5212                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5213                         send_notify_ack = 0;
5214                 /* The sessions will be cleared in the callback, if needed */
5215                 break;
5216
5217         case IMM_NTFY_GLBL_LOGO:
5218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5219                     "qla_target(%d): Link failure detected\n",
5220                     vha->vp_idx);
5221                 /* I_T nexus loss */
5222                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5223                         send_notify_ack = 0;
5224                 break;
5225
5226         case IMM_NTFY_IOCB_OVERFLOW:
5227                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5228                     "qla_target(%d): Cannot provide requested "
5229                     "capability (IOCB overflowed the immediate notify "
5230                     "resource count)\n", vha->vp_idx);
5231                 break;
5232
5233         case IMM_NTFY_ABORT_TASK:
5234                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5235                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5236                     "L %#x)\n", vha->vp_idx,
5237                     le16_to_cpu(iocb->u.isp2x.seq_id),
5238                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5239                     le16_to_cpu(iocb->u.isp2x.lun));
5240                 if (qlt_abort_task(vha, iocb) == 0)
5241                         send_notify_ack = 0;
5242                 break;
5243
5244         case IMM_NTFY_RESOURCE:
5245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5246                     "qla_target(%d): Out of resources, host %ld\n",
5247                     vha->vp_idx, vha->host_no);
5248                 break;
5249
5250         case IMM_NTFY_MSG_RX:
5251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5252                     "qla_target(%d): Immediate notify task %x\n",
5253                     vha->vp_idx, iocb->u.isp2x.task_flags);
5254                 break;
5255
5256         case IMM_NTFY_ELS:
5257                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5258                         send_notify_ack = 0;
5259                 break;
5260         default:
5261                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5262                     "qla_target(%d): Received unknown immediate "
5263                     "notify status %x\n", vha->vp_idx, status);
5264                 break;
5265         }
5266
5267         if (send_notify_ack)
5268                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5269                     0, 0);
5270 }
5271
5272 /*
5273  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5274  * This function sends busy to ISP 2xxx or 24xx.
5275  */
5276 static int __qlt_send_busy(struct qla_qpair *qpair,
5277         struct atio_from_isp *atio, uint16_t status)
5278 {
5279         struct scsi_qla_host *vha = qpair->vha;
5280         struct ctio7_to_24xx *ctio24;
5281         struct qla_hw_data *ha = vha->hw;
5282         request_t *pkt;
5283         struct fc_port *sess = NULL;
5284         unsigned long flags;
5285         u16 temp;
5286         port_id_t id;
5287
5288         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5289
5290         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5291         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5292         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5293         if (!sess) {
5294                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5295                 return 0;
5296         }
5297         /* Sending marker isn't necessary, since we called from ISR */
5298
5299         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5300         if (!pkt) {
5301                 ql_dbg(ql_dbg_io, vha, 0x3063,
5302                     "qla_target(%d): %s failed: unable to allocate "
5303                     "request packet", vha->vp_idx, __func__);
5304                 return -ENOMEM;
5305         }
5306
5307         qpair->tgt_counters.num_q_full_sent++;
5308         pkt->entry_count = 1;
5309         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5310
5311         ctio24 = (struct ctio7_to_24xx *)pkt;
5312         ctio24->entry_type = CTIO_TYPE7;
5313         ctio24->nport_handle = sess->loop_id;
5314         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5315         ctio24->vp_index = vha->vp_idx;
5316         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5317         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5318         temp = (atio->u.isp24.attr << 9) |
5319                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5320                 CTIO7_FLAGS_DONT_RET_CTIO;
5321         ctio24->u.status1.flags = cpu_to_le16(temp);
5322         /*
5323          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5324          * if the explicit conformation is used.
5325          */
5326         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5327         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5328
5329         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5330
5331         if (ctio24->u.status1.residual != 0)
5332                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5333
5334         /* Memory Barrier */
5335         wmb();
5336         if (qpair->reqq_start_iocbs)
5337                 qpair->reqq_start_iocbs(qpair);
5338         else
5339                 qla2x00_start_iocbs(vha, qpair->req);
5340         return 0;
5341 }
5342
5343 /*
5344  * This routine is used to allocate a command for either a QFull condition
5345  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5346  * out previously.
5347  */
5348 static void
5349 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5350         struct atio_from_isp *atio, uint16_t status, int qfull)
5351 {
5352         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5353         struct qla_hw_data *ha = vha->hw;
5354         struct fc_port *sess;
5355         struct se_session *se_sess;
5356         struct qla_tgt_cmd *cmd;
5357         int tag, cpu;
5358         unsigned long flags;
5359
5360         if (unlikely(tgt->tgt_stop)) {
5361                 ql_dbg(ql_dbg_io, vha, 0x300a,
5362                         "New command while device %p is shutting down\n", tgt);
5363                 return;
5364         }
5365
5366         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5367                 vha->hw->tgt.num_qfull_cmds_dropped++;
5368                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5369                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5370                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5371                                 vha->hw->tgt.num_qfull_cmds_dropped;
5372
5373                 ql_dbg(ql_dbg_io, vha, 0x3068,
5374                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5375                         vha->vp_idx, __func__,
5376                         vha->hw->tgt.num_qfull_cmds_dropped);
5377
5378                 qlt_chk_exch_leak_thresh_hold(vha);
5379                 return;
5380         }
5381
5382         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5383                 (vha, atio->u.isp24.fcp_hdr.s_id);
5384         if (!sess)
5385                 return;
5386
5387         se_sess = sess->se_sess;
5388
5389         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5390         if (tag < 0) {
5391                 ql_dbg(ql_dbg_io, vha, 0x3009,
5392                         "qla_target(%d): %s: Allocation of cmd failed\n",
5393                         vha->vp_idx, __func__);
5394
5395                 vha->hw->tgt.num_qfull_cmds_dropped++;
5396                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5397                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5398                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5399                                 vha->hw->tgt.num_qfull_cmds_dropped;
5400
5401                 qlt_chk_exch_leak_thresh_hold(vha);
5402                 return;
5403         }
5404
5405         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5406         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5407
5408         qlt_incr_num_pend_cmds(vha);
5409         INIT_LIST_HEAD(&cmd->cmd_list);
5410         memcpy(&cmd->atio, atio, sizeof(*atio));
5411
5412         cmd->tgt = vha->vha_tgt.qla_tgt;
5413         cmd->vha = vha;
5414         cmd->reset_count = ha->base_qpair->chip_reset;
5415         cmd->q_full = 1;
5416         cmd->qpair = ha->base_qpair;
5417         cmd->se_cmd.map_cpu = cpu;
5418
5419         if (qfull) {
5420                 cmd->q_full = 1;
5421                 /* NOTE: borrowing the state field to carry the status */
5422                 cmd->state = status;
5423         } else
5424                 cmd->term_exchg = 1;
5425
5426         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5427         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5428
5429         vha->hw->tgt.num_qfull_cmds_alloc++;
5430         if (vha->hw->tgt.num_qfull_cmds_alloc >
5431                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5432                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5433                         vha->hw->tgt.num_qfull_cmds_alloc;
5434         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5435 }
5436
5437 int
5438 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5439 {
5440         struct scsi_qla_host *vha = qpair->vha;
5441         struct qla_hw_data *ha = vha->hw;
5442         unsigned long flags;
5443         struct qla_tgt_cmd *cmd, *tcmd;
5444         struct list_head free_list, q_full_list;
5445         int rc = 0;
5446
5447         if (list_empty(&ha->tgt.q_full_list))
5448                 return 0;
5449
5450         INIT_LIST_HEAD(&free_list);
5451         INIT_LIST_HEAD(&q_full_list);
5452
5453         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5454         if (list_empty(&ha->tgt.q_full_list)) {
5455                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5456                 return 0;
5457         }
5458
5459         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5460         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5461
5462         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5463         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5464                 if (cmd->q_full)
5465                         /* cmd->state is a borrowed field to hold status */
5466                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5467                 else if (cmd->term_exchg)
5468                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5469
5470                 if (rc == -ENOMEM)
5471                         break;
5472
5473                 if (cmd->q_full)
5474                         ql_dbg(ql_dbg_io, vha, 0x3006,
5475                             "%s: busy sent for ox_id[%04x]\n", __func__,
5476                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5477                 else if (cmd->term_exchg)
5478                         ql_dbg(ql_dbg_io, vha, 0x3007,
5479                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5480                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5481                 else
5482                         ql_dbg(ql_dbg_io, vha, 0x3008,
5483                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5484                             cmd);
5485
5486                 list_del(&cmd->cmd_list);
5487                 list_add_tail(&cmd->cmd_list, &free_list);
5488
5489                 /* piggy back on hardware_lock for protection */
5490                 vha->hw->tgt.num_qfull_cmds_alloc--;
5491         }
5492         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5493
5494         cmd = NULL;
5495
5496         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5497                 list_del(&cmd->cmd_list);
5498                 /* This cmd was never sent to TCM.  There is no need
5499                  * to schedule free or call free_cmd
5500                  */
5501                 qlt_free_cmd(cmd);
5502         }
5503
5504         if (!list_empty(&q_full_list)) {
5505                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5506                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5507                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5508         }
5509
5510         return rc;
5511 }
5512
5513 static void
5514 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5515     uint16_t status)
5516 {
5517         int rc = 0;
5518         struct scsi_qla_host *vha = qpair->vha;
5519
5520         rc = __qlt_send_busy(qpair, atio, status);
5521         if (rc == -ENOMEM)
5522                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5523 }
5524
5525 static int
5526 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5527         struct atio_from_isp *atio, uint8_t ha_locked)
5528 {
5529         struct qla_hw_data *ha = vha->hw;
5530         unsigned long flags;
5531
5532         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5533                 return 0;
5534
5535         if (!ha_locked)
5536                 spin_lock_irqsave(&ha->hardware_lock, flags);
5537         qlt_send_busy(qpair, atio, qla_sam_status);
5538         if (!ha_locked)
5539                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5540
5541         return 1;
5542 }
5543
5544 /* ha->hardware_lock supposed to be held on entry */
5545 /* called via callback from qla2xxx */
5546 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5547         struct atio_from_isp *atio, uint8_t ha_locked)
5548 {
5549         struct qla_hw_data *ha = vha->hw;
5550         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5551         int rc;
5552         unsigned long flags = 0;
5553
5554         if (unlikely(tgt == NULL)) {
5555                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5556                     "ATIO pkt, but no tgt (ha %p)", ha);
5557                 return;
5558         }
5559         /*
5560          * In tgt_stop mode we also should allow all requests to pass.
5561          * Otherwise, some commands can stuck.
5562          */
5563
5564         tgt->atio_irq_cmd_count++;
5565
5566         switch (atio->u.raw.entry_type) {
5567         case ATIO_TYPE7:
5568                 if (unlikely(atio->u.isp24.exchange_addr ==
5569                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5570                         ql_dbg(ql_dbg_io, vha, 0x3065,
5571                             "qla_target(%d): ATIO_TYPE7 "
5572                             "received with UNKNOWN exchange address, "
5573                             "sending QUEUE_FULL\n", vha->vp_idx);
5574                         if (!ha_locked)
5575                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5576                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5577                         if (!ha_locked)
5578                                 spin_unlock_irqrestore(&ha->hardware_lock,
5579                                     flags);
5580                         break;
5581                 }
5582
5583                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5584                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5585                             atio, ha_locked);
5586                         if (rc != 0) {
5587                                 tgt->atio_irq_cmd_count--;
5588                                 return;
5589                         }
5590                         rc = qlt_handle_cmd_for_atio(vha, atio);
5591                 } else {
5592                         rc = qlt_handle_task_mgmt(vha, atio);
5593                 }
5594                 if (unlikely(rc != 0)) {
5595                         if (!ha_locked)
5596                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5597                         switch (rc) {
5598                         case -ENODEV:
5599                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5600                                     "qla_target: Unable to send command to target\n");
5601                                 break;
5602                         case -EBADF:
5603                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5604                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5605                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5606                                     atio, 1, 0);
5607                                 break;
5608                         case -EBUSY:
5609                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5610                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5611                                     vha->vp_idx);
5612                                 qlt_send_busy(ha->base_qpair, atio,
5613                                     tc_sam_status);
5614                                 break;
5615                         default:
5616                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5617                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5618                                     vha->vp_idx);
5619                                 qlt_send_busy(ha->base_qpair, atio,
5620                                     qla_sam_status);
5621                                 break;
5622                         }
5623                         if (!ha_locked)
5624                                 spin_unlock_irqrestore(&ha->hardware_lock,
5625                                     flags);
5626                 }
5627                 break;
5628
5629         case IMMED_NOTIFY_TYPE:
5630         {
5631                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5632                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5633                             "qla_target(%d): Received ATIO packet %x "
5634                             "with error status %x\n", vha->vp_idx,
5635                             atio->u.raw.entry_type,
5636                             atio->u.isp2x.entry_status);
5637                         break;
5638                 }
5639                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5640
5641                 if (!ha_locked)
5642                         spin_lock_irqsave(&ha->hardware_lock, flags);
5643                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5644                 if (!ha_locked)
5645                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5646                 break;
5647         }
5648
5649         default:
5650                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5651                     "qla_target(%d): Received unknown ATIO atio "
5652                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5653                 break;
5654         }
5655
5656         tgt->atio_irq_cmd_count--;
5657 }
5658
5659 /*
5660  * qpair lock is assume to be held
5661  * rc = 0 : send terminate & abts respond
5662  * rc != 0: do not send term & abts respond
5663  */
5664 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5665     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5666 {
5667         struct qla_hw_data *ha = vha->hw;
5668         int rc = 0;
5669
5670         /*
5671          * Detect unresolved exchange. If the same ABTS is unable
5672          * to terminate an existing command and the same ABTS loops
5673          * between FW & Driver, then force FW dump. Under 1 jiff,
5674          * we should see multiple loops.
5675          */
5676         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5677             qpair->retry_term_jiff == jiffies) {
5678                 /* found existing exchange */
5679                 qpair->retry_term_cnt++;
5680                 if (qpair->retry_term_cnt >= 5) {
5681                         rc = EIO;
5682                         qpair->retry_term_cnt = 0;
5683                         ql_log(ql_log_warn, vha, 0xffff,
5684                             "Unable to send ABTS Respond. Dumping firmware.\n");
5685                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5686                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5687
5688                         if (qpair == ha->base_qpair)
5689                                 ha->isp_ops->fw_dump(vha, 1);
5690                         else
5691                                 ha->isp_ops->fw_dump(vha, 0);
5692
5693                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5694                         qla2xxx_wake_dpc(vha);
5695                 }
5696         } else if (qpair->retry_term_jiff != jiffies) {
5697                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5698                 qpair->retry_term_cnt = 0;
5699                 qpair->retry_term_jiff = jiffies;
5700         }
5701
5702         return rc;
5703 }
5704
5705
5706 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5707         struct rsp_que *rsp, response_t *pkt)
5708 {
5709         struct abts_resp_from_24xx_fw *entry =
5710                 (struct abts_resp_from_24xx_fw *)pkt;
5711         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5712         struct qla_tgt_mgmt_cmd *mcmd;
5713         struct qla_hw_data *ha = vha->hw;
5714
5715         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5716         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5717                 ql_dbg(ql_dbg_async, vha, 0xe064,
5718                     "qla_target(%d): ABTS Comp without mcmd\n",
5719                     vha->vp_idx);
5720                 return;
5721         }
5722
5723         if (mcmd)
5724                 vha  = mcmd->vha;
5725         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5726
5727         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5728             "ABTS_RESP_24XX: compl_status %x\n",
5729             entry->compl_status);
5730
5731         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5732                 if ((entry->error_subcode1 == 0x1E) &&
5733                     (entry->error_subcode2 == 0)) {
5734                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5735                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5736                                 return;
5737                         }
5738                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5739                             pkt, mcmd);
5740                 } else {
5741                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5742                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5743                             vha->vp_idx, entry->compl_status,
5744                             entry->error_subcode1,
5745                             entry->error_subcode2);
5746                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5747                 }
5748         } else if (mcmd) {
5749                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5750         }
5751 }
5752
5753 /* ha->hardware_lock supposed to be held on entry */
5754 /* called via callback from qla2xxx */
5755 static void qlt_response_pkt(struct scsi_qla_host *vha,
5756         struct rsp_que *rsp, response_t *pkt)
5757 {
5758         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5759
5760         if (unlikely(tgt == NULL)) {
5761                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5762                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5763                     vha->vp_idx, pkt->entry_type, vha->hw);
5764                 return;
5765         }
5766
5767         /*
5768          * In tgt_stop mode we also should allow all requests to pass.
5769          * Otherwise, some commands can stuck.
5770          */
5771
5772         switch (pkt->entry_type) {
5773         case CTIO_CRC2:
5774         case CTIO_TYPE7:
5775         {
5776                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5777
5778                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5779                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5780                     entry);
5781                 break;
5782         }
5783
5784         case ACCEPT_TGT_IO_TYPE:
5785         {
5786                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5787                 int rc;
5788
5789                 if (atio->u.isp2x.status !=
5790                     cpu_to_le16(ATIO_CDB_VALID)) {
5791                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5792                             "qla_target(%d): ATIO with error "
5793                             "status %x received\n", vha->vp_idx,
5794                             le16_to_cpu(atio->u.isp2x.status));
5795                         break;
5796                 }
5797
5798                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5799                 if (rc != 0)
5800                         return;
5801
5802                 rc = qlt_handle_cmd_for_atio(vha, atio);
5803                 if (unlikely(rc != 0)) {
5804                         switch (rc) {
5805                         case -ENODEV:
5806                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5807                                     "qla_target: Unable to send command to target\n");
5808                                 break;
5809                         case -EBADF:
5810                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5811                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5812                                 qlt_send_term_exchange(rsp->qpair, NULL,
5813                                     atio, 1, 0);
5814                                 break;
5815                         case -EBUSY:
5816                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5817                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5818                                     vha->vp_idx);
5819                                 qlt_send_busy(rsp->qpair, atio,
5820                                     tc_sam_status);
5821                                 break;
5822                         default:
5823                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5824                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5825                                     vha->vp_idx);
5826                                 qlt_send_busy(rsp->qpair, atio,
5827                                     qla_sam_status);
5828                                 break;
5829                         }
5830                 }
5831         }
5832         break;
5833
5834         case CONTINUE_TGT_IO_TYPE:
5835         {
5836                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5837
5838                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5839                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5840                     entry);
5841                 break;
5842         }
5843
5844         case CTIO_A64_TYPE:
5845         {
5846                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5847
5848                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5849                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5850                     entry);
5851                 break;
5852         }
5853
5854         case IMMED_NOTIFY_TYPE:
5855                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5856                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5857                 break;
5858
5859         case NOTIFY_ACK_TYPE:
5860                 if (tgt->notify_ack_expected > 0) {
5861                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5862
5863                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5864                             "NOTIFY_ACK seq %08x status %x\n",
5865                             le16_to_cpu(entry->u.isp2x.seq_id),
5866                             le16_to_cpu(entry->u.isp2x.status));
5867                         tgt->notify_ack_expected--;
5868                         if (entry->u.isp2x.status !=
5869                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5870                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5871                                     "qla_target(%d): NOTIFY_ACK "
5872                                     "failed %x\n", vha->vp_idx,
5873                                     le16_to_cpu(entry->u.isp2x.status));
5874                         }
5875                 } else {
5876                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5877                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5878                             vha->vp_idx);
5879                 }
5880                 break;
5881
5882         case ABTS_RECV_24XX:
5883                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5884                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5885                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5886                 break;
5887
5888         case ABTS_RESP_24XX:
5889                 if (tgt->abts_resp_expected > 0) {
5890                         qlt_handle_abts_completion(vha, rsp, pkt);
5891                 } else {
5892                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5893                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5894                             "received\n", vha->vp_idx);
5895                 }
5896                 break;
5897
5898         default:
5899                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5900                     "qla_target(%d): Received unknown response pkt "
5901                     "type %x\n", vha->vp_idx, pkt->entry_type);
5902                 break;
5903         }
5904
5905 }
5906
5907 /*
5908  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5909  */
5910 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5911         uint16_t *mailbox)
5912 {
5913         struct qla_hw_data *ha = vha->hw;
5914         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5915         int login_code;
5916
5917         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5918                 return;
5919
5920         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5921             IS_QLA2100(ha))
5922                 return;
5923         /*
5924          * In tgt_stop mode we also should allow all requests to pass.
5925          * Otherwise, some commands can stuck.
5926          */
5927
5928
5929         switch (code) {
5930         case MBA_RESET:                 /* Reset */
5931         case MBA_SYSTEM_ERR:            /* System Error */
5932         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5933         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5934                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5935                     "qla_target(%d): System error async event %#x "
5936                     "occurred", vha->vp_idx, code);
5937                 break;
5938         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5939                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5940                 break;
5941
5942         case MBA_LOOP_UP:
5943         {
5944                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5945                     "qla_target(%d): Async LOOP_UP occurred "
5946                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5947                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5948                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5949                 if (tgt->link_reinit_iocb_pending) {
5950                         qlt_send_notify_ack(ha->base_qpair,
5951                             (void *)&tgt->link_reinit_iocb,
5952                             0, 0, 0, 0, 0, 0);
5953                         tgt->link_reinit_iocb_pending = 0;
5954                 }
5955                 break;
5956         }
5957
5958         case MBA_LIP_OCCURRED:
5959         case MBA_LOOP_DOWN:
5960         case MBA_LIP_RESET:
5961         case MBA_RSCN_UPDATE:
5962                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5963                     "qla_target(%d): Async event %#x occurred "
5964                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5965                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5966                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5967                 break;
5968
5969         case MBA_REJECTED_FCP_CMD:
5970                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5971                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5972                     vha->vp_idx,
5973                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5974                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5975
5976                 if (le16_to_cpu(mailbox[3]) == 1) {
5977                         /* exchange starvation. */
5978                         vha->hw->exch_starvation++;
5979                         if (vha->hw->exch_starvation > 5) {
5980                                 ql_log(ql_log_warn, vha, 0xd03a,
5981                                     "Exchange starvation-. Resetting RISC\n");
5982
5983                                 vha->hw->exch_starvation = 0;
5984                                 if (IS_P3P_TYPE(vha->hw))
5985                                         set_bit(FCOE_CTX_RESET_NEEDED,
5986                                             &vha->dpc_flags);
5987                                 else
5988                                         set_bit(ISP_ABORT_NEEDED,
5989                                             &vha->dpc_flags);
5990                                 qla2xxx_wake_dpc(vha);
5991                         }
5992                 }
5993                 break;
5994
5995         case MBA_PORT_UPDATE:
5996                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5997                     "qla_target(%d): Port update async event %#x "
5998                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5999                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6000                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
6001                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
6002
6003                 login_code = le16_to_cpu(mailbox[2]);
6004                 if (login_code == 0x4) {
6005                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6006                             "Async MB 2: Got PLOGI Complete\n");
6007                         vha->hw->exch_starvation = 0;
6008                 } else if (login_code == 0x7)
6009                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6010                             "Async MB 2: Port Logged Out\n");
6011                 break;
6012         default:
6013                 break;
6014         }
6015
6016 }
6017
6018 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6019         uint16_t loop_id)
6020 {
6021         fc_port_t *fcport, *tfcp, *del;
6022         int rc;
6023         unsigned long flags;
6024         u8 newfcport = 0;
6025
6026         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6027         if (!fcport) {
6028                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6029                     "qla_target(%d): Allocation of tmp FC port failed",
6030                     vha->vp_idx);
6031                 return NULL;
6032         }
6033
6034         fcport->loop_id = loop_id;
6035
6036         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6037         if (rc != QLA_SUCCESS) {
6038                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6039                     "qla_target(%d): Failed to retrieve fcport "
6040                     "information -- get_port_database() returned %x "
6041                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6042                 kfree(fcport);
6043                 return NULL;
6044         }
6045
6046         del = NULL;
6047         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6048         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6049
6050         if (tfcp) {
6051                 tfcp->d_id = fcport->d_id;
6052                 tfcp->port_type = fcport->port_type;
6053                 tfcp->supported_classes = fcport->supported_classes;
6054                 tfcp->flags |= fcport->flags;
6055                 tfcp->scan_state = QLA_FCPORT_FOUND;
6056
6057                 del = fcport;
6058                 fcport = tfcp;
6059         } else {
6060                 if (vha->hw->current_topology == ISP_CFG_F)
6061                         fcport->flags |= FCF_FABRIC_DEVICE;
6062
6063                 list_add_tail(&fcport->list, &vha->vp_fcports);
6064                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6065                    vha->fcport_count++;
6066                 fcport->login_gen++;
6067                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6068                 fcport->login_succ = 1;
6069                 newfcport = 1;
6070         }
6071
6072         fcport->deleted = 0;
6073         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6074
6075         switch (vha->host->active_mode) {
6076         case MODE_INITIATOR:
6077         case MODE_DUAL:
6078                 if (newfcport) {
6079                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6080                                 qla24xx_sched_upd_fcport(fcport);
6081                         } else {
6082                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6083                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6084                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6085                                 qla24xx_post_gpsc_work(vha, fcport);
6086                         }
6087                 }
6088                 break;
6089
6090         case MODE_TARGET:
6091         default:
6092                 break;
6093         }
6094         if (del)
6095                 qla2x00_free_fcport(del);
6096
6097         return fcport;
6098 }
6099
6100 /* Must be called under tgt_mutex */
6101 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6102                                            be_id_t s_id)
6103 {
6104         struct fc_port *sess = NULL;
6105         fc_port_t *fcport = NULL;
6106         int rc, global_resets;
6107         uint16_t loop_id = 0;
6108
6109         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6110                 /*
6111                  * This is Domain Controller, so it should be
6112                  * OK to drop SCSI commands from it.
6113                  */
6114                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6115                     "Unable to find initiator with S_ID %x:%x:%x",
6116                     s_id.domain, s_id.area, s_id.al_pa);
6117                 return NULL;
6118         }
6119
6120         mutex_lock(&vha->vha_tgt.tgt_mutex);
6121
6122 retry:
6123         global_resets =
6124             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6125
6126         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6127         if (rc != 0) {
6128                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6129
6130                 ql_log(ql_log_info, vha, 0xf071,
6131                     "qla_target(%d): Unable to find "
6132                     "initiator with S_ID %x:%x:%x",
6133                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6134
6135                 if (rc == -ENOENT) {
6136                         qlt_port_logo_t logo;
6137
6138                         logo.id = be_to_port_id(s_id);
6139                         logo.cmd_count = 1;
6140                         qlt_send_first_logo(vha, &logo);
6141                 }
6142
6143                 return NULL;
6144         }
6145
6146         fcport = qlt_get_port_database(vha, loop_id);
6147         if (!fcport) {
6148                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6149                 return NULL;
6150         }
6151
6152         if (global_resets !=
6153             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6154                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6155                     "qla_target(%d): global reset during session discovery "
6156                     "(counter was %d, new %d), retrying", vha->vp_idx,
6157                     global_resets,
6158                     atomic_read(&vha->vha_tgt.
6159                         qla_tgt->tgt_global_resets_count));
6160                 goto retry;
6161         }
6162
6163         sess = qlt_create_sess(vha, fcport, true);
6164
6165         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6166
6167         return sess;
6168 }
6169
6170 static void qlt_abort_work(struct qla_tgt *tgt,
6171         struct qla_tgt_sess_work_param *prm)
6172 {
6173         struct scsi_qla_host *vha = tgt->vha;
6174         struct qla_hw_data *ha = vha->hw;
6175         struct fc_port *sess = NULL;
6176         unsigned long flags = 0, flags2 = 0;
6177         be_id_t s_id;
6178         int rc;
6179
6180         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6181
6182         if (tgt->tgt_stop)
6183                 goto out_term2;
6184
6185         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6186
6187         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6188         if (!sess) {
6189                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6190
6191                 sess = qlt_make_local_sess(vha, s_id);
6192                 /* sess has got an extra creation ref */
6193
6194                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6195                 if (!sess)
6196                         goto out_term2;
6197         } else {
6198                 if (sess->deleted) {
6199                         sess = NULL;
6200                         goto out_term2;
6201                 }
6202
6203                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6204                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6205                             "%s: kref_get fail %8phC \n",
6206                              __func__, sess->port_name);
6207                         sess = NULL;
6208                         goto out_term2;
6209                 }
6210         }
6211
6212         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6213         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6214
6215         ha->tgt.tgt_ops->put_sess(sess);
6216
6217         if (rc != 0)
6218                 goto out_term;
6219         return;
6220
6221 out_term2:
6222         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6223
6224 out_term:
6225         spin_lock_irqsave(&ha->hardware_lock, flags);
6226         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6227             FCP_TMF_REJECTED, false);
6228         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6229 }
6230
6231 static void qlt_tmr_work(struct qla_tgt *tgt,
6232         struct qla_tgt_sess_work_param *prm)
6233 {
6234         struct atio_from_isp *a = &prm->tm_iocb2;
6235         struct scsi_qla_host *vha = tgt->vha;
6236         struct qla_hw_data *ha = vha->hw;
6237         struct fc_port *sess;
6238         unsigned long flags;
6239         be_id_t s_id;
6240         int rc;
6241         u64 unpacked_lun;
6242         int fn;
6243         void *iocb;
6244
6245         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6246
6247         if (tgt->tgt_stop)
6248                 goto out_term2;
6249
6250         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6251         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6252         if (!sess) {
6253                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6254
6255                 sess = qlt_make_local_sess(vha, s_id);
6256                 /* sess has got an extra creation ref */
6257
6258                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6259                 if (!sess)
6260                         goto out_term2;
6261         } else {
6262                 if (sess->deleted) {
6263                         goto out_term2;
6264                 }
6265
6266                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6267                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6268                             "%s: kref_get fail %8phC\n",
6269                              __func__, sess->port_name);
6270                         goto out_term2;
6271                 }
6272         }
6273
6274         iocb = a;
6275         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6276         unpacked_lun =
6277             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6278
6279         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6280         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6281
6282         ha->tgt.tgt_ops->put_sess(sess);
6283
6284         if (rc != 0)
6285                 goto out_term;
6286         return;
6287
6288 out_term2:
6289         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6290 out_term:
6291         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6292 }
6293
6294 static void qlt_sess_work_fn(struct work_struct *work)
6295 {
6296         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6297         struct scsi_qla_host *vha = tgt->vha;
6298         unsigned long flags;
6299
6300         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6301
6302         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6303         while (!list_empty(&tgt->sess_works_list)) {
6304                 struct qla_tgt_sess_work_param *prm = list_entry(
6305                     tgt->sess_works_list.next, typeof(*prm),
6306                     sess_works_list_entry);
6307
6308                 /*
6309                  * This work can be scheduled on several CPUs at time, so we
6310                  * must delete the entry to eliminate double processing
6311                  */
6312                 list_del(&prm->sess_works_list_entry);
6313
6314                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6315
6316                 switch (prm->type) {
6317                 case QLA_TGT_SESS_WORK_ABORT:
6318                         qlt_abort_work(tgt, prm);
6319                         break;
6320                 case QLA_TGT_SESS_WORK_TM:
6321                         qlt_tmr_work(tgt, prm);
6322                         break;
6323                 default:
6324                         BUG_ON(1);
6325                         break;
6326                 }
6327
6328                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6329
6330                 kfree(prm);
6331         }
6332         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6333 }
6334
6335 /* Must be called under tgt_host_action_mutex */
6336 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6337 {
6338         struct qla_tgt *tgt;
6339         int rc, i;
6340         struct qla_qpair_hint *h;
6341
6342         if (!QLA_TGT_MODE_ENABLED())
6343                 return 0;
6344
6345         if (!IS_TGT_MODE_CAPABLE(ha)) {
6346                 ql_log(ql_log_warn, base_vha, 0xe070,
6347                     "This adapter does not support target mode.\n");
6348                 return 0;
6349         }
6350
6351         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6352             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6353
6354         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6355
6356         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6357         if (!tgt) {
6358                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6359                     "Unable to allocate struct qla_tgt\n");
6360                 return -ENOMEM;
6361         }
6362
6363         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6364                                sizeof(struct qla_qpair_hint),
6365                                GFP_KERNEL);
6366         if (!tgt->qphints) {
6367                 kfree(tgt);
6368                 ql_log(ql_log_warn, base_vha, 0x0197,
6369                     "Unable to allocate qpair hints.\n");
6370                 return -ENOMEM;
6371         }
6372
6373         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6374                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6375
6376         rc = btree_init64(&tgt->lun_qpair_map);
6377         if (rc) {
6378                 kfree(tgt->qphints);
6379                 kfree(tgt);
6380                 ql_log(ql_log_info, base_vha, 0x0198,
6381                         "Unable to initialize lun_qpair_map btree\n");
6382                 return -EIO;
6383         }
6384         h = &tgt->qphints[0];
6385         h->qpair = ha->base_qpair;
6386         INIT_LIST_HEAD(&h->hint_elem);
6387         h->cpuid = ha->base_qpair->cpuid;
6388         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6389
6390         for (i = 0; i < ha->max_qpairs; i++) {
6391                 unsigned long flags;
6392
6393                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6394
6395                 h = &tgt->qphints[i + 1];
6396                 INIT_LIST_HEAD(&h->hint_elem);
6397                 if (qpair) {
6398                         h->qpair = qpair;
6399                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6400                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6401                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6402                         h->cpuid = qpair->cpuid;
6403                 }
6404         }
6405
6406         tgt->ha = ha;
6407         tgt->vha = base_vha;
6408         init_waitqueue_head(&tgt->waitQ);
6409         INIT_LIST_HEAD(&tgt->del_sess_list);
6410         spin_lock_init(&tgt->sess_work_lock);
6411         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6412         INIT_LIST_HEAD(&tgt->sess_works_list);
6413         atomic_set(&tgt->tgt_global_resets_count, 0);
6414
6415         base_vha->vha_tgt.qla_tgt = tgt;
6416
6417         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6418                 "qla_target(%d): using 64 Bit PCI addressing",
6419                 base_vha->vp_idx);
6420         /* 3 is reserved */
6421         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6422
6423         mutex_lock(&qla_tgt_mutex);
6424         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6425         mutex_unlock(&qla_tgt_mutex);
6426
6427         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6428                 ha->tgt.tgt_ops->add_target(base_vha);
6429
6430         return 0;
6431 }
6432
6433 /* Must be called under tgt_host_action_mutex */
6434 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6435 {
6436         if (!vha->vha_tgt.qla_tgt)
6437                 return 0;
6438
6439         if (vha->fc_vport) {
6440                 qlt_release(vha->vha_tgt.qla_tgt);
6441                 return 0;
6442         }
6443
6444         /* free left over qfull cmds */
6445         qlt_init_term_exchange(vha);
6446
6447         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6448             vha->host_no, ha);
6449         qlt_release(vha->vha_tgt.qla_tgt);
6450
6451         return 0;
6452 }
6453
6454 void qlt_remove_target_resources(struct qla_hw_data *ha)
6455 {
6456         struct scsi_qla_host *node;
6457         u32 key = 0;
6458
6459         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6460                 btree_remove32(&ha->tgt.host_map, key);
6461
6462         btree_destroy32(&ha->tgt.host_map);
6463 }
6464
6465 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6466         unsigned char *b)
6467 {
6468         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6469         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6470         put_unaligned_be64(wwpn, b);
6471         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6472 }
6473
6474 /**
6475  * qla_tgt_lport_register - register lport with external module
6476  *
6477  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6478  * @phys_wwpn: physical port WWPN
6479  * @npiv_wwpn: NPIV WWPN
6480  * @npiv_wwnn: NPIV WWNN
6481  * @callback:  lport initialization callback for tcm_qla2xxx code
6482  */
6483 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6484                        u64 npiv_wwpn, u64 npiv_wwnn,
6485                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6486 {
6487         struct qla_tgt *tgt;
6488         struct scsi_qla_host *vha;
6489         struct qla_hw_data *ha;
6490         struct Scsi_Host *host;
6491         unsigned long flags;
6492         int rc;
6493         u8 b[WWN_SIZE];
6494
6495         mutex_lock(&qla_tgt_mutex);
6496         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6497                 vha = tgt->vha;
6498                 ha = vha->hw;
6499
6500                 host = vha->host;
6501                 if (!host)
6502                         continue;
6503
6504                 if (!(host->hostt->supported_mode & MODE_TARGET))
6505                         continue;
6506
6507                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6508                         continue;
6509
6510                 spin_lock_irqsave(&ha->hardware_lock, flags);
6511                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6512                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6513                             host->host_no);
6514                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6515                         continue;
6516                 }
6517                 if (tgt->tgt_stop) {
6518                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6519                                  host->host_no);
6520                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6521                         continue;
6522                 }
6523                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6524
6525                 if (!scsi_host_get(host)) {
6526                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6527                             "Unable to scsi_host_get() for"
6528                             " qla2xxx scsi_host\n");
6529                         continue;
6530                 }
6531                 qlt_lport_dump(vha, phys_wwpn, b);
6532
6533                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6534                         scsi_host_put(host);
6535                         continue;
6536                 }
6537                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6538                 if (rc != 0)
6539                         scsi_host_put(host);
6540
6541                 mutex_unlock(&qla_tgt_mutex);
6542                 return rc;
6543         }
6544         mutex_unlock(&qla_tgt_mutex);
6545
6546         return -ENODEV;
6547 }
6548 EXPORT_SYMBOL(qlt_lport_register);
6549
6550 /**
6551  * qla_tgt_lport_deregister - Degister lport
6552  *
6553  * @vha:  Registered scsi_qla_host pointer
6554  */
6555 void qlt_lport_deregister(struct scsi_qla_host *vha)
6556 {
6557         struct qla_hw_data *ha = vha->hw;
6558         struct Scsi_Host *sh = vha->host;
6559         /*
6560          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6561          */
6562         vha->vha_tgt.target_lport_ptr = NULL;
6563         ha->tgt.tgt_ops = NULL;
6564         /*
6565          * Release the Scsi_Host reference for the underlying qla2xxx host
6566          */
6567         scsi_host_put(sh);
6568 }
6569 EXPORT_SYMBOL(qlt_lport_deregister);
6570
6571 /* Must be called under HW lock */
6572 void qlt_set_mode(struct scsi_qla_host *vha)
6573 {
6574         switch (vha->qlini_mode) {
6575         case QLA2XXX_INI_MODE_DISABLED:
6576         case QLA2XXX_INI_MODE_EXCLUSIVE:
6577                 vha->host->active_mode = MODE_TARGET;
6578                 break;
6579         case QLA2XXX_INI_MODE_ENABLED:
6580                 vha->host->active_mode = MODE_INITIATOR;
6581                 break;
6582         case QLA2XXX_INI_MODE_DUAL:
6583                 vha->host->active_mode = MODE_DUAL;
6584                 break;
6585         default:
6586                 break;
6587         }
6588 }
6589
6590 /* Must be called under HW lock */
6591 static void qlt_clear_mode(struct scsi_qla_host *vha)
6592 {
6593         switch (vha->qlini_mode) {
6594         case QLA2XXX_INI_MODE_DISABLED:
6595                 vha->host->active_mode = MODE_UNKNOWN;
6596                 break;
6597         case QLA2XXX_INI_MODE_EXCLUSIVE:
6598                 vha->host->active_mode = MODE_INITIATOR;
6599                 break;
6600         case QLA2XXX_INI_MODE_ENABLED:
6601         case QLA2XXX_INI_MODE_DUAL:
6602                 vha->host->active_mode = MODE_INITIATOR;
6603                 break;
6604         default:
6605                 break;
6606         }
6607 }
6608
6609 /*
6610  * qla_tgt_enable_vha - NO LOCK HELD
6611  *
6612  * host_reset, bring up w/ Target Mode Enabled
6613  */
6614 void
6615 qlt_enable_vha(struct scsi_qla_host *vha)
6616 {
6617         struct qla_hw_data *ha = vha->hw;
6618         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6619         unsigned long flags;
6620         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6621
6622         if (!tgt) {
6623                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6624                     "Unable to locate qla_tgt pointer from"
6625                     " struct qla_hw_data\n");
6626                 dump_stack();
6627                 return;
6628         }
6629         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6630                 return;
6631
6632         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6633                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6634         spin_lock_irqsave(&ha->hardware_lock, flags);
6635         tgt->tgt_stopped = 0;
6636         qlt_set_mode(vha);
6637         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6638
6639         mutex_lock(&ha->optrom_mutex);
6640         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6641             "%s.\n", __func__);
6642         if (vha->vp_idx) {
6643                 qla24xx_disable_vp(vha);
6644                 qla24xx_enable_vp(vha);
6645         } else {
6646                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6647                 qla2xxx_wake_dpc(base_vha);
6648                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6649                              QLA_SUCCESS);
6650         }
6651         mutex_unlock(&ha->optrom_mutex);
6652 }
6653 EXPORT_SYMBOL(qlt_enable_vha);
6654
6655 /*
6656  * qla_tgt_disable_vha - NO LOCK HELD
6657  *
6658  * Disable Target Mode and reset the adapter
6659  */
6660 static void qlt_disable_vha(struct scsi_qla_host *vha)
6661 {
6662         struct qla_hw_data *ha = vha->hw;
6663         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6664         unsigned long flags;
6665
6666         if (!tgt) {
6667                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6668                     "Unable to locate qla_tgt pointer from"
6669                     " struct qla_hw_data\n");
6670                 dump_stack();
6671                 return;
6672         }
6673
6674         spin_lock_irqsave(&ha->hardware_lock, flags);
6675         qlt_clear_mode(vha);
6676         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6677
6678         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6679         qla2xxx_wake_dpc(vha);
6680         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6681                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6682                        "qla2x00_wait_for_hba_online() failed\n");
6683 }
6684
6685 /*
6686  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6687  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6688  * members.
6689  */
6690 void
6691 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6692 {
6693         vha->vha_tgt.qla_tgt = NULL;
6694
6695         mutex_init(&vha->vha_tgt.tgt_mutex);
6696         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6697
6698         qlt_clear_mode(vha);
6699
6700         /*
6701          * NOTE: Currently the value is kept the same for <24xx and
6702          * >=24xx ISPs. If it is necessary to change it,
6703          * the check should be added for specific ISPs,
6704          * assigning the value appropriately.
6705          */
6706         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6707
6708         qlt_add_target(ha, vha);
6709 }
6710
6711 u8
6712 qlt_rff_id(struct scsi_qla_host *vha)
6713 {
6714         u8 fc4_feature = 0;
6715         /*
6716          * FC-4 Feature bit 0 indicates target functionality to the name server.
6717          */
6718         if (qla_tgt_mode_enabled(vha)) {
6719                 fc4_feature = BIT_0;
6720         } else if (qla_ini_mode_enabled(vha)) {
6721                 fc4_feature = BIT_1;
6722         } else if (qla_dual_mode_enabled(vha))
6723                 fc4_feature = BIT_0 | BIT_1;
6724
6725         return fc4_feature;
6726 }
6727
6728 /*
6729  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6730  * @ha: HA context
6731  *
6732  * Beginning of ATIO ring has initialization control block already built
6733  * by nvram config routine.
6734  *
6735  * Returns 0 on success.
6736  */
6737 void
6738 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6739 {
6740         struct qla_hw_data *ha = vha->hw;
6741         uint16_t cnt;
6742         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6743
6744         if (qla_ini_mode_enabled(vha))
6745                 return;
6746
6747         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6748                 pkt->u.raw.signature = ATIO_PROCESSED;
6749                 pkt++;
6750         }
6751
6752 }
6753
6754 /*
6755  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6756  * @ha: SCSI driver HA context
6757  */
6758 void
6759 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6760 {
6761         struct qla_hw_data *ha = vha->hw;
6762         struct atio_from_isp *pkt;
6763         int cnt, i;
6764
6765         if (!ha->flags.fw_started)
6766                 return;
6767
6768         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6769             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6770                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6771                 cnt = pkt->u.raw.entry_count;
6772
6773                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6774                         /*
6775                          * This packet is corrupted. The header + payload
6776                          * can not be trusted. There is no point in passing
6777                          * it further up.
6778                          */
6779                         ql_log(ql_log_warn, vha, 0xd03c,
6780                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6781                             &pkt->u.isp24.fcp_hdr.s_id,
6782                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6783                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6784
6785                         adjust_corrupted_atio(pkt);
6786                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6787                             ha_locked, 0);
6788                 } else {
6789                         qlt_24xx_atio_pkt_all_vps(vha,
6790                             (struct atio_from_isp *)pkt, ha_locked);
6791                 }
6792
6793                 for (i = 0; i < cnt; i++) {
6794                         ha->tgt.atio_ring_index++;
6795                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6796                                 ha->tgt.atio_ring_index = 0;
6797                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6798                         } else
6799                                 ha->tgt.atio_ring_ptr++;
6800
6801                         pkt->u.raw.signature = ATIO_PROCESSED;
6802                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6803                 }
6804                 wmb();
6805         }
6806
6807         /* Adjust ring index */
6808         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6809 }
6810
6811 void
6812 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6813 {
6814         struct qla_hw_data *ha = vha->hw;
6815         struct qla_msix_entry *msix = &ha->msix_entries[2];
6816         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6817
6818         if (!QLA_TGT_MODE_ENABLED())
6819                 return;
6820
6821         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6822         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6823         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6824
6825         if (ha->flags.msix_enabled) {
6826                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6827                         if (IS_QLA2071(ha)) {
6828                                 /* 4 ports Baker: Enable Interrupt Handshake */
6829                                 icb->msix_atio = 0;
6830                                 icb->firmware_options_2 |= BIT_26;
6831                         } else {
6832                                 icb->msix_atio = cpu_to_le16(msix->entry);
6833                                 icb->firmware_options_2 &= ~BIT_26;
6834                         }
6835                         ql_dbg(ql_dbg_init, vha, 0xf072,
6836                             "Registering ICB vector 0x%x for atio que.\n",
6837                             msix->entry);
6838                 }
6839         } else {
6840                 /* INTx|MSI */
6841                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6842                         icb->msix_atio = 0;
6843                         icb->firmware_options_2 |= BIT_26;
6844                         ql_dbg(ql_dbg_init, vha, 0xf072,
6845                             "%s: Use INTx for ATIOQ.\n", __func__);
6846                 }
6847         }
6848 }
6849
6850 void
6851 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6852 {
6853         struct qla_hw_data *ha = vha->hw;
6854         u32 tmp;
6855
6856         if (!QLA_TGT_MODE_ENABLED())
6857                 return;
6858
6859         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6860                 if (!ha->tgt.saved_set) {
6861                         /* We save only once */
6862                         ha->tgt.saved_exchange_count = nv->exchange_count;
6863                         ha->tgt.saved_firmware_options_1 =
6864                             nv->firmware_options_1;
6865                         ha->tgt.saved_firmware_options_2 =
6866                             nv->firmware_options_2;
6867                         ha->tgt.saved_firmware_options_3 =
6868                             nv->firmware_options_3;
6869                         ha->tgt.saved_set = 1;
6870                 }
6871
6872                 if (qla_tgt_mode_enabled(vha))
6873                         nv->exchange_count = cpu_to_le16(0xFFFF);
6874                 else                    /* dual */
6875                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6876
6877                 /* Enable target mode */
6878                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6879
6880                 /* Disable ini mode, if requested */
6881                 if (qla_tgt_mode_enabled(vha))
6882                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6883
6884                 /* Disable Full Login after LIP */
6885                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6886                 /* Enable initial LIP */
6887                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6888                 if (ql2xtgt_tape_enable)
6889                         /* Enable FC Tape support */
6890                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6891                 else
6892                         /* Disable FC Tape support */
6893                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6894
6895                 /* Disable Full Login after LIP */
6896                 nv->host_p &= cpu_to_le32(~BIT_10);
6897
6898                 /*
6899                  * clear BIT 15 explicitly as we have seen at least
6900                  * a couple of instances where this was set and this
6901                  * was causing the firmware to not be initialized.
6902                  */
6903                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6904                 /* Enable target PRLI control */
6905                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6906
6907                 if (IS_QLA25XX(ha)) {
6908                         /* Change Loop-prefer to Pt-Pt */
6909                         tmp = ~(BIT_4|BIT_5|BIT_6);
6910                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6911                         tmp = P2P << 4;
6912                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6913                 }
6914         } else {
6915                 if (ha->tgt.saved_set) {
6916                         nv->exchange_count = ha->tgt.saved_exchange_count;
6917                         nv->firmware_options_1 =
6918                             ha->tgt.saved_firmware_options_1;
6919                         nv->firmware_options_2 =
6920                             ha->tgt.saved_firmware_options_2;
6921                         nv->firmware_options_3 =
6922                             ha->tgt.saved_firmware_options_3;
6923                 }
6924                 return;
6925         }
6926
6927         if (ha->base_qpair->enable_class_2) {
6928                 if (vha->flags.init_done)
6929                         fc_host_supported_classes(vha->host) =
6930                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6931
6932                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6933         } else {
6934                 if (vha->flags.init_done)
6935                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6936
6937                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6938         }
6939 }
6940
6941 void
6942 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6943         struct init_cb_24xx *icb)
6944 {
6945         struct qla_hw_data *ha = vha->hw;
6946
6947         if (!QLA_TGT_MODE_ENABLED())
6948                 return;
6949
6950         if (ha->tgt.node_name_set) {
6951                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6952                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6953         }
6954 }
6955
6956 void
6957 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6958 {
6959         struct qla_hw_data *ha = vha->hw;
6960         u32 tmp;
6961
6962         if (!QLA_TGT_MODE_ENABLED())
6963                 return;
6964
6965         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6966                 if (!ha->tgt.saved_set) {
6967                         /* We save only once */
6968                         ha->tgt.saved_exchange_count = nv->exchange_count;
6969                         ha->tgt.saved_firmware_options_1 =
6970                             nv->firmware_options_1;
6971                         ha->tgt.saved_firmware_options_2 =
6972                             nv->firmware_options_2;
6973                         ha->tgt.saved_firmware_options_3 =
6974                             nv->firmware_options_3;
6975                         ha->tgt.saved_set = 1;
6976                 }
6977
6978                 if (qla_tgt_mode_enabled(vha))
6979                         nv->exchange_count = cpu_to_le16(0xFFFF);
6980                 else                    /* dual */
6981                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6982
6983                 /* Enable target mode */
6984                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6985
6986                 /* Disable ini mode, if requested */
6987                 if (qla_tgt_mode_enabled(vha))
6988                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6989                 /* Disable Full Login after LIP */
6990                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6991                 /* Enable initial LIP */
6992                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6993                 /*
6994                  * clear BIT 15 explicitly as we have seen at
6995                  * least a couple of instances where this was set
6996                  * and this was causing the firmware to not be
6997                  * initialized.
6998                  */
6999                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7000                 if (ql2xtgt_tape_enable)
7001                         /* Enable FC tape support */
7002                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7003                 else
7004                         /* Disable FC tape support */
7005                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7006
7007                 /* Disable Full Login after LIP */
7008                 nv->host_p &= cpu_to_le32(~BIT_10);
7009                 /* Enable target PRLI control */
7010                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7011
7012                 /* Change Loop-prefer to Pt-Pt */
7013                 tmp = ~(BIT_4|BIT_5|BIT_6);
7014                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7015                 tmp = P2P << 4;
7016                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7017         } else {
7018                 if (ha->tgt.saved_set) {
7019                         nv->exchange_count = ha->tgt.saved_exchange_count;
7020                         nv->firmware_options_1 =
7021                             ha->tgt.saved_firmware_options_1;
7022                         nv->firmware_options_2 =
7023                             ha->tgt.saved_firmware_options_2;
7024                         nv->firmware_options_3 =
7025                             ha->tgt.saved_firmware_options_3;
7026                 }
7027                 return;
7028         }
7029
7030         if (ha->base_qpair->enable_class_2) {
7031                 if (vha->flags.init_done)
7032                         fc_host_supported_classes(vha->host) =
7033                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7034
7035                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7036         } else {
7037                 if (vha->flags.init_done)
7038                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7039
7040                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7041         }
7042 }
7043
7044 void
7045 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7046         struct init_cb_81xx *icb)
7047 {
7048         struct qla_hw_data *ha = vha->hw;
7049
7050         if (!QLA_TGT_MODE_ENABLED())
7051                 return;
7052
7053         if (ha->tgt.node_name_set) {
7054                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7055                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7056         }
7057 }
7058
7059 void
7060 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7061 {
7062         if (!QLA_TGT_MODE_ENABLED())
7063                 return;
7064
7065         ha->msix_count += 1; /* For ATIO Q */
7066 }
7067
7068
7069 void
7070 qlt_modify_vp_config(struct scsi_qla_host *vha,
7071         struct vp_config_entry_24xx *vpmod)
7072 {
7073         /* enable target mode.  Bit5 = 1 => disable */
7074         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7075                 vpmod->options_idx1 &= ~BIT_5;
7076
7077         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7078         if (qla_tgt_mode_enabled(vha))
7079                 vpmod->options_idx1 &= ~BIT_4;
7080 }
7081
7082 void
7083 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7084 {
7085         int rc;
7086
7087         if (!QLA_TGT_MODE_ENABLED())
7088                 return;
7089
7090         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha) ||
7091             IS_QLA28XX(ha)) {
7092                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7093                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7094         } else {
7095                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7096                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7097         }
7098
7099         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7100         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7101
7102         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7103         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7104             qlt_unknown_atio_work_fn);
7105
7106         qlt_clear_mode(base_vha);
7107
7108         rc = btree_init32(&ha->tgt.host_map);
7109         if (rc)
7110                 ql_log(ql_log_info, base_vha, 0xd03d,
7111                     "Unable to initialize ha->host_map btree\n");
7112
7113         qlt_update_vp_map(base_vha, SET_VP_IDX);
7114 }
7115
7116 irqreturn_t
7117 qla83xx_msix_atio_q(int irq, void *dev_id)
7118 {
7119         struct rsp_que *rsp;
7120         scsi_qla_host_t *vha;
7121         struct qla_hw_data *ha;
7122         unsigned long flags;
7123
7124         rsp = (struct rsp_que *) dev_id;
7125         ha = rsp->hw;
7126         vha = pci_get_drvdata(ha->pdev);
7127
7128         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7129
7130         qlt_24xx_process_atio_queue(vha, 0);
7131
7132         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7133
7134         return IRQ_HANDLED;
7135 }
7136
7137 static void
7138 qlt_handle_abts_recv_work(struct work_struct *work)
7139 {
7140         struct qla_tgt_sess_op *op = container_of(work,
7141                 struct qla_tgt_sess_op, work);
7142         scsi_qla_host_t *vha = op->vha;
7143         struct qla_hw_data *ha = vha->hw;
7144         unsigned long flags;
7145
7146         if (qla2x00_reset_active(vha) ||
7147             (op->chip_reset != ha->base_qpair->chip_reset))
7148                 return;
7149
7150         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7151         qlt_24xx_process_atio_queue(vha, 0);
7152         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7153
7154         spin_lock_irqsave(&ha->hardware_lock, flags);
7155         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7156         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7157
7158         kfree(op);
7159 }
7160
7161 void
7162 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7163     response_t *pkt)
7164 {
7165         struct qla_tgt_sess_op *op;
7166
7167         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7168
7169         if (!op) {
7170                 /* do not reach for ATIO queue here.  This is best effort err
7171                  * recovery at this point.
7172                  */
7173                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7174                 return;
7175         }
7176
7177         memcpy(&op->atio, pkt, sizeof(*pkt));
7178         op->vha = vha;
7179         op->chip_reset = vha->hw->base_qpair->chip_reset;
7180         op->rsp = rsp;
7181         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7182         queue_work(qla_tgt_wq, &op->work);
7183         return;
7184 }
7185
7186 int
7187 qlt_mem_alloc(struct qla_hw_data *ha)
7188 {
7189         if (!QLA_TGT_MODE_ENABLED())
7190                 return 0;
7191
7192         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7193                                      sizeof(struct qla_tgt_vp_map),
7194                                      GFP_KERNEL);
7195         if (!ha->tgt.tgt_vp_map)
7196                 return -ENOMEM;
7197
7198         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7199             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7200             &ha->tgt.atio_dma, GFP_KERNEL);
7201         if (!ha->tgt.atio_ring) {
7202                 kfree(ha->tgt.tgt_vp_map);
7203                 return -ENOMEM;
7204         }
7205         return 0;
7206 }
7207
7208 void
7209 qlt_mem_free(struct qla_hw_data *ha)
7210 {
7211         if (!QLA_TGT_MODE_ENABLED())
7212                 return;
7213
7214         if (ha->tgt.atio_ring) {
7215                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7216                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7217                     ha->tgt.atio_dma);
7218         }
7219         ha->tgt.atio_ring = NULL;
7220         ha->tgt.atio_dma = 0;
7221         kfree(ha->tgt.tgt_vp_map);
7222         ha->tgt.tgt_vp_map = NULL;
7223 }
7224
7225 /* vport_slock to be held by the caller */
7226 void
7227 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7228 {
7229         void *slot;
7230         u32 key;
7231         int rc;
7232
7233         if (!QLA_TGT_MODE_ENABLED())
7234                 return;
7235
7236         key = vha->d_id.b24;
7237
7238         switch (cmd) {
7239         case SET_VP_IDX:
7240                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7241                 break;
7242         case SET_AL_PA:
7243                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7244                 if (!slot) {
7245                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7246                             "Save vha in host_map %p %06x\n", vha, key);
7247                         rc = btree_insert32(&vha->hw->tgt.host_map,
7248                                 key, vha, GFP_ATOMIC);
7249                         if (rc)
7250                                 ql_log(ql_log_info, vha, 0xd03e,
7251                                     "Unable to insert s_id into host_map: %06x\n",
7252                                     key);
7253                         return;
7254                 }
7255                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7256                     "replace existing vha in host_map %p %06x\n", vha, key);
7257                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7258                 break;
7259         case RESET_VP_IDX:
7260                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7261                 break;
7262         case RESET_AL_PA:
7263                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7264                    "clear vha in host_map %p %06x\n", vha, key);
7265                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7266                 if (slot)
7267                         btree_remove32(&vha->hw->tgt.host_map, key);
7268                 vha->d_id.b24 = 0;
7269                 break;
7270         }
7271 }
7272
7273 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7274 {
7275
7276         if (!vha->d_id.b24) {
7277                 vha->d_id = id;
7278                 qlt_update_vp_map(vha, SET_AL_PA);
7279         } else if (vha->d_id.b24 != id.b24) {
7280                 qlt_update_vp_map(vha, RESET_AL_PA);
7281                 vha->d_id = id;
7282                 qlt_update_vp_map(vha, SET_AL_PA);
7283         }
7284 }
7285
7286 static int __init qlt_parse_ini_mode(void)
7287 {
7288         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7289                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7290         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7291                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7292         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7293                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7294         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7295                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7296         else
7297                 return false;
7298
7299         return true;
7300 }
7301
7302 int __init qlt_init(void)
7303 {
7304         int ret;
7305
7306         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7307         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7308
7309         if (!qlt_parse_ini_mode()) {
7310                 ql_log(ql_log_fatal, NULL, 0xe06b,
7311                     "qlt_parse_ini_mode() failed\n");
7312                 return -EINVAL;
7313         }
7314
7315         if (!QLA_TGT_MODE_ENABLED())
7316                 return 0;
7317
7318         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7319             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7320             qla_tgt_mgmt_cmd), 0, NULL);
7321         if (!qla_tgt_mgmt_cmd_cachep) {
7322                 ql_log(ql_log_fatal, NULL, 0xd04b,
7323                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7324                 return -ENOMEM;
7325         }
7326
7327         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7328             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7329             0, NULL);
7330
7331         if (!qla_tgt_plogi_cachep) {
7332                 ql_log(ql_log_fatal, NULL, 0xe06d,
7333                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7334                 ret = -ENOMEM;
7335                 goto out_mgmt_cmd_cachep;
7336         }
7337
7338         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7339             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7340         if (!qla_tgt_mgmt_cmd_mempool) {
7341                 ql_log(ql_log_fatal, NULL, 0xe06e,
7342                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7343                 ret = -ENOMEM;
7344                 goto out_plogi_cachep;
7345         }
7346
7347         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7348         if (!qla_tgt_wq) {
7349                 ql_log(ql_log_fatal, NULL, 0xe06f,
7350                     "alloc_workqueue for qla_tgt_wq failed\n");
7351                 ret = -ENOMEM;
7352                 goto out_cmd_mempool;
7353         }
7354         /*
7355          * Return 1 to signal that initiator-mode is being disabled
7356          */
7357         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7358
7359 out_cmd_mempool:
7360         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7361 out_plogi_cachep:
7362         kmem_cache_destroy(qla_tgt_plogi_cachep);
7363 out_mgmt_cmd_cachep:
7364         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7365         return ret;
7366 }
7367
7368 void qlt_exit(void)
7369 {
7370         if (!QLA_TGT_MODE_ENABLED())
7371                 return;
7372
7373         destroy_workqueue(qla_tgt_wq);
7374         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7375         kmem_cache_destroy(qla_tgt_plogi_cachep);
7376         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7377 }