drivers/scsi/qedi/qedi_fw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include <linux/blkdev.h>
   8 #include <scsi/scsi_tcq.h>
   9 #include <linux/delay.h>
  10
  11 #include "qedi.h"
  12 #include "qedi_iscsi.h"
  13 #include "qedi_gbl.h"
  14 #include "qedi_fw_iscsi.h"
  15 #include "qedi_fw_scsi.h"
  16
  17 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
  18                                struct iscsi_task *mtask);
  19
  20 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
  21 {
  22         struct scsi_cmnd *sc = cmd->scsi_cmd;
  23
  24         if (cmd->io_tbl.sge_valid && sc) {
  25                 cmd->io_tbl.sge_valid = 0;
  26                 scsi_dma_unmap(sc);
  27         }
  28 }
  29
  30 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
  31                                      union iscsi_cqe *cqe,
  32                                      struct iscsi_task *task,
  33                                      struct qedi_conn *qedi_conn)
  34 {
  35         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  36         struct iscsi_logout_rsp *resp_hdr;
  37         struct iscsi_session *session = conn->session;
  38         struct iscsi_logout_response_hdr *cqe_logout_response;
  39         struct qedi_cmd *cmd;
  40
  41         cmd = (struct qedi_cmd *)task->dd_data;
  42         cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
  43         spin_lock(&session->back_lock);
  44         resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  45         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
  46         resp_hdr->opcode = cqe_logout_response->opcode;
  47         resp_hdr->flags = cqe_logout_response->flags;
  48         resp_hdr->hlength = 0;
  49
  50         resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
  51         resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
  52         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
  53         resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
  54
  55         resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
  56         resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
  57
  58         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
  59                   "Freeing tid=0x%x for cid=0x%x\n",
  60                   cmd->task_id, qedi_conn->iscsi_conn_id);
  61
  62         if (likely(cmd->io_cmd_in_list)) {
  63                 cmd->io_cmd_in_list = false;
  64                 list_del_init(&cmd->io_cmd);
  65                 qedi_conn->active_cmd_count--;
  66         } else {
  67                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  68                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
  69                           cmd->task_id, qedi_conn->iscsi_conn_id,
  70                           &cmd->io_cmd);
  71         }
  72
  73         cmd->state = RESPONSE_RECEIVED;
  74         qedi_clear_task_idx(qedi, cmd->task_id);
  75         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
  76
  77         spin_unlock(&session->back_lock);
  78 }
  79
  80 static void qedi_process_text_resp(struct qedi_ctx *qedi,
  81                                    union iscsi_cqe *cqe,
  82                                    struct iscsi_task *task,
  83                                    struct qedi_conn *qedi_conn)
  84 {
  85         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  86         struct iscsi_session *session = conn->session;
  87         struct e4_iscsi_task_context *task_ctx;
  88         struct iscsi_text_rsp *resp_hdr_ptr;
  89         struct iscsi_text_response_hdr *cqe_text_response;
  90         struct qedi_cmd *cmd;
  91         int pld_len;
  92
  93         cmd = (struct qedi_cmd *)task->dd_data;
  94         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
  95
  96         cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
  97         spin_lock(&session->back_lock);
  98         resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  99         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
 100         resp_hdr_ptr->opcode = cqe_text_response->opcode;
 101         resp_hdr_ptr->flags = cqe_text_response->flags;
 102         resp_hdr_ptr->hlength = 0;
 103
 104         hton24(resp_hdr_ptr->dlength,
 105                (cqe_text_response->hdr_second_dword &
 106                 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 107
 108         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 109                                       conn->session->age);
 110         resp_hdr_ptr->ttt = cqe_text_response->ttt;
 111         resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
 112         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
 113         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
 114
 115         pld_len = cqe_text_response->hdr_second_dword &
 116                   ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 117         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 118
 119         memset(task_ctx, '\0', sizeof(*task_ctx));
 120
 121         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 122                   "Freeing tid=0x%x for cid=0x%x\n",
 123                   cmd->task_id, qedi_conn->iscsi_conn_id);
 124
 125         if (likely(cmd->io_cmd_in_list)) {
 126                 cmd->io_cmd_in_list = false;
 127                 list_del_init(&cmd->io_cmd);
 128                 qedi_conn->active_cmd_count--;
 129         } else {
 130                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 131                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
 132                           cmd->task_id, qedi_conn->iscsi_conn_id,
 133                           &cmd->io_cmd);
 134         }
 135
 136         cmd->state = RESPONSE_RECEIVED;
 137         qedi_clear_task_idx(qedi, cmd->task_id);
 138
 139         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 140                              qedi_conn->gen_pdu.resp_buf,
 141                              (qedi_conn->gen_pdu.resp_wr_ptr -
 142                               qedi_conn->gen_pdu.resp_buf));
 143         spin_unlock(&session->back_lock);
 144 }
 145
 146 static void qedi_tmf_resp_work(struct work_struct *work)
 147 {
 148         struct qedi_cmd *qedi_cmd =
 149                                 container_of(work, struct qedi_cmd, tmf_work);
 150         struct qedi_conn *qedi_conn = qedi_cmd->conn;
 151         struct qedi_ctx *qedi = qedi_conn->qedi;
 152         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 153         struct iscsi_session *session = conn->session;
 154         struct iscsi_tm_rsp *resp_hdr_ptr;
 155         int rval = 0;
 156
 157         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 158         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 159
 160         iscsi_block_session(session->cls_session);
 161         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 162         if (rval) {
 163                 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 164                 iscsi_unblock_session(session->cls_session);
 165                 goto exit_tmf_resp;
 166         }
 167
 168         iscsi_unblock_session(session->cls_session);
 169         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 170
 171         spin_lock(&session->back_lock);
 172         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 173         spin_unlock(&session->back_lock);
 174
 175 exit_tmf_resp:
 176         kfree(resp_hdr_ptr);
 177         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 178 }
 179
 180 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 181                                   union iscsi_cqe *cqe,
 182                                   struct iscsi_task *task,
 183                                   struct qedi_conn *qedi_conn)
 184
 185 {
 186         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 187         struct iscsi_session *session = conn->session;
 188         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 189         struct iscsi_tm_rsp *resp_hdr_ptr;
 190         struct iscsi_tm *tmf_hdr;
 191         struct qedi_cmd *qedi_cmd = NULL;
 192
 193         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 194
 195         qedi_cmd = task->dd_data;
 196         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
 197         if (!qedi_cmd->tmf_resp_buf) {
 198                 QEDI_ERR(&qedi->dbg_ctx,
 199                          "Failed to allocate resp buf, cid=0x%x\n",
 200                           qedi_conn->iscsi_conn_id);
 201                 return;
 202         }
 203
 204         spin_lock(&session->back_lock);
 205         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 206         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 207
 208         /* Fill up the header */
 209         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 210         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 211         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 212         resp_hdr_ptr->hlength = 0;
 213
 214         hton24(resp_hdr_ptr->dlength,
 215                (cqe_tmp_response->hdr_second_dword &
 216                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 217         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 218                                       conn->session->age);
 219         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 220         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 221         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 222
 223         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 224
 225         if (likely(qedi_cmd->io_cmd_in_list)) {
 226                 qedi_cmd->io_cmd_in_list = false;
 227                 list_del_init(&qedi_cmd->io_cmd);
 228                 qedi_conn->active_cmd_count--;
 229         }
 230
 231         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 232               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 233             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 234               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 235             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 236               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 237                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 238                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 239                 goto unblock_sess;
 240         }
 241
 242         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 243
 244         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 245         kfree(resp_hdr_ptr);
 246
 247 unblock_sess:
 248         spin_unlock(&session->back_lock);
 249 }
 250
 251 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 252                                     union iscsi_cqe *cqe,
 253                                     struct iscsi_task *task,
 254                                     struct qedi_conn *qedi_conn)
 255 {
 256         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 257         struct iscsi_session *session = conn->session;
 258         struct e4_iscsi_task_context *task_ctx;
 259         struct iscsi_login_rsp *resp_hdr_ptr;
 260         struct iscsi_login_response_hdr *cqe_login_response;
 261         struct qedi_cmd *cmd;
 262         int pld_len;
 263
 264         cmd = (struct qedi_cmd *)task->dd_data;
 265
 266         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 267         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 268
 269         spin_lock(&session->back_lock);
 270         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 271         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 272         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 273         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 274         resp_hdr_ptr->hlength = 0;
 275
 276         hton24(resp_hdr_ptr->dlength,
 277                (cqe_login_response->hdr_second_dword &
 278                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 279         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 280                                       conn->session->age);
 281         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 282         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 283         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 284         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 285         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 286         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 287         pld_len = cqe_login_response->hdr_second_dword &
 288                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 289         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 290
 291         if (likely(cmd->io_cmd_in_list)) {
 292                 cmd->io_cmd_in_list = false;
 293                 list_del_init(&cmd->io_cmd);
 294                 qedi_conn->active_cmd_count--;
 295         }
 296
 297         memset(task_ctx, '\0', sizeof(*task_ctx));
 298
 299         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 300                              qedi_conn->gen_pdu.resp_buf,
 301                              (qedi_conn->gen_pdu.resp_wr_ptr -
 302                              qedi_conn->gen_pdu.resp_buf));
 303
 304         spin_unlock(&session->back_lock);
 305         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 306                   "Freeing tid=0x%x for cid=0x%x\n",
 307                   cmd->task_id, qedi_conn->iscsi_conn_id);
 308         cmd->state = RESPONSE_RECEIVED;
 309         qedi_clear_task_idx(qedi, cmd->task_id);
 310 }
 311
 312 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 313                                 struct iscsi_cqe_unsolicited *cqe,
 314                                 char *ptr, int len)
 315 {
 316         u16 idx = 0;
 317
 318         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 319                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 320                   len, qedi->bdq_prod_idx,
 321                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 322
 323         /* Obtain buffer address from rqe_opaque */
 324         idx = cqe->rqe_opaque;
 325         if (idx > (QEDI_BDQ_NUM - 1)) {
 326                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 327                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 328                           idx);
 329                 return;
 330         }
 331
 332         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 333                   "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
 334
 335         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 336                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 337         switch (cqe->unsol_cqe_type) {
 338         case ISCSI_CQE_UNSOLICITED_SINGLE:
 339         case ISCSI_CQE_UNSOLICITED_FIRST:
 340                 if (len)
 341                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 342                 break;
 343         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 344         case ISCSI_CQE_UNSOLICITED_LAST:
 345                 break;
 346         default:
 347                 break;
 348         }
 349 }
 350
 351 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 352                                 struct iscsi_cqe_unsolicited *cqe,
 353                                 int count)
 354 {
 355         u16 tmp;
 356         u16 idx = 0;
 357         struct scsi_bd *pbl;
 358
 359         /* Obtain buffer address from rqe_opaque */
 360         idx = cqe->rqe_opaque;
 361         if (idx > (QEDI_BDQ_NUM - 1)) {
 362                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 363                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 364                           idx);
 365                 return;
 366         }
 367
 368         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 369         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 370         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 371         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 372         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 373                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 374                   pbl, pbl->address.hi, pbl->address.lo, idx);
 375         pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
 376         pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
 377         pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
 378         pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
 379
 380         /* Increment producer to let f/w know we've handled the frame */
 381         qedi->bdq_prod_idx += count;
 382
 383         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 384         tmp = readw(qedi->bdq_primary_prod);
 385
 386         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 387         tmp = readw(qedi->bdq_secondary_prod);
 388 }
 389
 390 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 391                                       struct iscsi_cqe_unsolicited *cqe,
 392                                       u32 pdu_len, u32 num_bdqs,
 393                                       char *bdq_data)
 394 {
 395         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 396                   "num_bdqs [%d]\n", num_bdqs);
 397
 398         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 399         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 400 }
 401
 402 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 403                                    union iscsi_cqe *cqe,
 404                                    struct iscsi_task *task,
 405                                    struct qedi_conn *qedi_conn, u16 que_idx)
 406 {
 407         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 408         struct iscsi_session *session = conn->session;
 409         struct iscsi_nop_in_hdr *cqe_nop_in;
 410         struct iscsi_nopin *hdr;
 411         struct qedi_cmd *cmd;
 412         int tgt_async_nop = 0;
 413         u32 lun[2];
 414         u32 pdu_len, num_bdqs;
 415         char bdq_data[QEDI_BDQ_BUF_SIZE];
 416         unsigned long flags;
 417
 418         spin_lock_bh(&session->back_lock);
 419         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 420
 421         pdu_len = cqe_nop_in->hdr_second_dword &
 422                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 423         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 424
 425         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 426         memset(hdr, 0, sizeof(struct iscsi_hdr));
 427         hdr->opcode = cqe_nop_in->opcode;
 428         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 429         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 430         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 431         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 432
 433         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 434                 spin_lock_irqsave(&qedi->hba_lock, flags);
 435                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 436                                           pdu_len, num_bdqs, bdq_data);
 437                 hdr->itt = RESERVED_ITT;
 438                 tgt_async_nop = 1;
 439                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 440                 goto done;
 441         }
 442
 443         /* Response to one of our nop-outs */
 444         if (task) {
 445                 cmd = task->dd_data;
 446                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 447                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 448                                      conn->session->age);
 449                 lun[0] = 0xffffffff;
 450                 lun[1] = 0xffffffff;
 451                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 452                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 453                           "Freeing tid=0x%x for cid=0x%x\n",
 454                           cmd->task_id, qedi_conn->iscsi_conn_id);
 455                 cmd->state = RESPONSE_RECEIVED;
 456                 spin_lock(&qedi_conn->list_lock);
 457                 if (likely(cmd->io_cmd_in_list)) {
 458                         cmd->io_cmd_in_list = false;
 459                         list_del_init(&cmd->io_cmd);
 460                         qedi_conn->active_cmd_count--;
 461                 }
 462
 463                 spin_unlock(&qedi_conn->list_lock);
 464                 qedi_clear_task_idx(qedi, cmd->task_id);
 465         }
 466
 467 done:
 468         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 469
 470         spin_unlock_bh(&session->back_lock);
 471         return tgt_async_nop;
 472 }
 473
 474 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 475                                     union iscsi_cqe *cqe,
 476                                     struct iscsi_task *task,
 477                                     struct qedi_conn *qedi_conn,
 478                                     u16 que_idx)
 479 {
 480         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 481         struct iscsi_session *session = conn->session;
 482         struct iscsi_async_msg_hdr *cqe_async_msg;
 483         struct iscsi_async *resp_hdr;
 484         u32 lun[2];
 485         u32 pdu_len, num_bdqs;
 486         char bdq_data[QEDI_BDQ_BUF_SIZE];
 487         unsigned long flags;
 488
 489         spin_lock_bh(&session->back_lock);
 490
 491         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 492         pdu_len = cqe_async_msg->hdr_second_dword &
 493                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 494         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 495
 496         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 497                 spin_lock_irqsave(&qedi->hba_lock, flags);
 498                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 499                                           pdu_len, num_bdqs, bdq_data);
 500                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 501         }
 502
 503         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 504         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 505         resp_hdr->opcode = cqe_async_msg->opcode;
 506         resp_hdr->flags = 0x80;
 507
 508         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 509         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 510         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 511         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 512         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 513         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 514
 515         resp_hdr->async_event = cqe_async_msg->async_event;
 516         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 517
 518         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 519         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 520         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 521
 522         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 523                              pdu_len);
 524
 525         spin_unlock_bh(&session->back_lock);
 526 }
 527
 528 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 529                                      union iscsi_cqe *cqe,
 530                                      struct iscsi_task *task,
 531                                      struct qedi_conn *qedi_conn,
 532                                      uint16_t que_idx)
 533 {
 534         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 535         struct iscsi_session *session = conn->session;
 536         struct iscsi_reject_hdr *cqe_reject;
 537         struct iscsi_reject *hdr;
 538         u32 pld_len, num_bdqs;
 539         unsigned long flags;
 540
 541         spin_lock_bh(&session->back_lock);
 542         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 543         pld_len = cqe_reject->hdr_second_dword &
 544                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 545         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 546
 547         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 548                 spin_lock_irqsave(&qedi->hba_lock, flags);
 549                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 550                                           pld_len, num_bdqs, conn->data);
 551                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 552         }
 553         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 554         memset(hdr, 0, sizeof(struct iscsi_hdr));
 555         hdr->opcode = cqe_reject->opcode;
 556         hdr->reason = cqe_reject->hdr_reason;
 557         hdr->flags = cqe_reject->hdr_flags;
 558         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 559                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 560         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 561         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 562         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 563         hdr->ffffffff = cpu_to_be32(0xffffffff);
 564
 565         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 566                              conn->data, pld_len);
 567         spin_unlock_bh(&session->back_lock);
 568 }
 569
 570 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 571                                  union iscsi_cqe *cqe,
 572                                  struct iscsi_task *task,
 573                                  struct iscsi_conn *conn)
 574 {
 575         struct scsi_cmnd *sc_cmd;
 576         struct qedi_cmd *cmd = task->dd_data;
 577         struct iscsi_session *session = conn->session;
 578         struct iscsi_scsi_rsp *hdr;
 579         struct iscsi_data_in_hdr *cqe_data_in;
 580         int datalen = 0;
 581         struct qedi_conn *qedi_conn;
 582         u32 iscsi_cid;
 583         u8 cqe_err_bits = 0;
 584
 585         iscsi_cid  = cqe->cqe_common.conn_id;
 586         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 587
 588         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 589         cqe_err_bits =
 590                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 591
 592         spin_lock_bh(&session->back_lock);
 593         /* get the scsi command */
 594         sc_cmd = cmd->scsi_cmd;
 595
 596         if (!sc_cmd) {
 597                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 598                 goto error;
 599         }
 600
 601         if (!sc_cmd->SCp.ptr) {
 602                 QEDI_WARN(&qedi->dbg_ctx,
 603                           "SCp.ptr is NULL, returned in another context.\n");
 604                 goto error;
 605         }
 606
 607         if (!sc_cmd->request) {
 608                 QEDI_WARN(&qedi->dbg_ctx,
 609                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 610                           sc_cmd);
 611                 goto error;
 612         }
 613
 614         if (!sc_cmd->request->q) {
 615                 QEDI_WARN(&qedi->dbg_ctx,
 616                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 617                           sc_cmd);
 618                 goto error;
 619         }
 620
 621         qedi_iscsi_unmap_sg_list(cmd);
 622
 623         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 624         hdr->opcode = cqe_data_in->opcode;
 625         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 626         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 627         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 628         hdr->response = cqe_data_in->reserved1;
 629         hdr->cmd_status = cqe_data_in->status_rsvd;
 630         hdr->flags = cqe_data_in->flags;
 631         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 632
 633         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 634                 datalen = cqe_data_in->reserved2 &
 635                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 636                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 637         }
 638
 639         /* If f/w reports data underrun err then set residual to IO transfer
 640          * length, set Underrun flag and clear Overrun flag explicitly
 641          */
 642         if (unlikely(cqe_err_bits &&
 643                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 644                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 645                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 646                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 647                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 648                           scsi_bufflen(sc_cmd));
 649                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 650                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 651                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 652         }
 653
 654         spin_lock(&qedi_conn->list_lock);
 655         if (likely(cmd->io_cmd_in_list)) {
 656                 cmd->io_cmd_in_list = false;
 657                 list_del_init(&cmd->io_cmd);
 658                 qedi_conn->active_cmd_count--;
 659         }
 660         spin_unlock(&qedi_conn->list_lock);
 661
 662         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 663                   "Freeing tid=0x%x for cid=0x%x\n",
 664                   cmd->task_id, qedi_conn->iscsi_conn_id);
 665         cmd->state = RESPONSE_RECEIVED;
 666         if (qedi_io_tracing)
 667                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 668
 669         qedi_clear_task_idx(qedi, cmd->task_id);
 670         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 671                              conn->data, datalen);
 672 error:
 673         spin_unlock_bh(&session->back_lock);
 674 }
 675
 676 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 677                                   union iscsi_cqe *cqe,
 678                                   struct iscsi_task *task,
 679                                   struct qedi_conn *conn, uint16_t que_idx)
 680 {
 681         struct iscsi_conn *iscsi_conn;
 682         u32 hdr_opcode;
 683
 684         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 685         iscsi_conn = conn->cls_conn->dd_data;
 686
 687         switch (hdr_opcode) {
 688         case ISCSI_OPCODE_SCSI_RESPONSE:
 689         case ISCSI_OPCODE_DATA_IN:
 690                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 691                 break;
 692         case ISCSI_OPCODE_LOGIN_RESPONSE:
 693                 qedi_process_login_resp(qedi, cqe, task, conn);
 694                 break;
 695         case ISCSI_OPCODE_TMF_RESPONSE:
 696                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 697                 break;
 698         case ISCSI_OPCODE_TEXT_RESPONSE:
 699                 qedi_process_text_resp(qedi, cqe, task, conn);
 700                 break;
 701         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 702                 qedi_process_logout_resp(qedi, cqe, task, conn);
 703                 break;
 704         case ISCSI_OPCODE_NOP_IN:
 705                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 706                 break;
 707         default:
 708                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 709         }
 710 }
 711
 712 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 713                                           struct iscsi_cqe_solicited *cqe,
 714                                           struct iscsi_task *task,
 715                                           struct qedi_conn *qedi_conn)
 716 {
 717         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 718         struct iscsi_session *session = conn->session;
 719         struct qedi_cmd *cmd = task->dd_data;
 720
 721         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 722                   "itid=0x%x, cmd task id=0x%x\n",
 723                   cqe->itid, cmd->task_id);
 724
 725         cmd->state = RESPONSE_RECEIVED;
 726         qedi_clear_task_idx(qedi, cmd->task_id);
 727
 728         spin_lock_bh(&session->back_lock);
 729         __iscsi_put_task(task);
 730         spin_unlock_bh(&session->back_lock);
 731 }
 732
 733 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 734                                           struct iscsi_cqe_solicited *cqe,
 735                                           struct iscsi_task *task,
 736                                           struct iscsi_conn *conn)
 737 {
 738         struct qedi_work_map *work, *work_tmp;
 739         u32 proto_itt = cqe->itid;
 740         u32 ptmp_itt = 0;
 741         itt_t protoitt = 0;
 742         int found = 0;
 743         struct qedi_cmd *qedi_cmd = NULL;
 744         u32 rtid = 0;
 745         u32 iscsi_cid;
 746         struct qedi_conn *qedi_conn;
 747         struct qedi_cmd *dbg_cmd;
 748         struct iscsi_task *mtask;
 749         struct iscsi_tm *tmf_hdr = NULL;
 750
 751         iscsi_cid = cqe->conn_id;
 752         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 753         if (!qedi_conn) {
 754                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 755                           "icid not found 0x%x\n", cqe->conn_id);
 756                 return;
 757         }
 758
 759         /* Based on this itt get the corresponding qedi_cmd */
 760         spin_lock_bh(&qedi_conn->tmf_work_lock);
 761         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 762                                  list) {
 763                 if (work->rtid == proto_itt) {
 764                         /* We found the command */
 765                         qedi_cmd = work->qedi_cmd;
 766                         if (!qedi_cmd->list_tmf_work) {
 767                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 768                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 769                                           proto_itt, qedi_conn->iscsi_conn_id);
 770                                 WARN_ON(1);
 771                         }
 772                         found = 1;
 773                         mtask = qedi_cmd->task;
 774                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 775                         rtid = work->rtid;
 776
 777                         list_del_init(&work->list);
 778                         kfree(work);
 779                         qedi_cmd->list_tmf_work = NULL;
 780                 }
 781         }
 782         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 783
 784         if (found) {
 785                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 786                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 787                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 788
 789                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 790                     ISCSI_TM_FUNC_ABORT_TASK) {
 791                         spin_lock_bh(&conn->session->back_lock);
 792
 793                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 794                                              conn->session->age);
 795                         task = iscsi_itt_to_task(conn, protoitt);
 796
 797                         spin_unlock_bh(&conn->session->back_lock);
 798
 799                         if (!task) {
 800                                 QEDI_NOTICE(&qedi->dbg_ctx,
 801                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 802                                             get_itt(tmf_hdr->rtt),
 803                                             qedi_conn->iscsi_conn_id);
 804                                 return;
 805                         }
 806
 807                         dbg_cmd = task->dd_data;
 808
 809                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 810                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 811                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 812                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 813
 814                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 815                                 qedi_cmd->state = CLEANUP_RECV;
 816
 817                         qedi_clear_task_idx(qedi_conn->qedi, rtid);
 818
 819                         spin_lock(&qedi_conn->list_lock);
 820                         list_del_init(&dbg_cmd->io_cmd);
 821                         qedi_conn->active_cmd_count--;
 822                         spin_unlock(&qedi_conn->list_lock);
 823                         qedi_cmd->state = CLEANUP_RECV;
 824                         wake_up_interruptible(&qedi_conn->wait_queue);
 825                 }
 826         } else if (qedi_conn->cmd_cleanup_req > 0) {
 827                 spin_lock_bh(&conn->session->back_lock);
 828                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 829                 protoitt = build_itt(ptmp_itt, conn->session->age);
 830                 task = iscsi_itt_to_task(conn, protoitt);
 831                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 832                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 833                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 834                           qedi_conn->iscsi_conn_id);
 835
 836                 spin_unlock_bh(&conn->session->back_lock);
 837                 if (!task) {
 838                         QEDI_NOTICE(&qedi->dbg_ctx,
 839                                     "task is null, itid=0x%x, cid=0x%x\n",
 840                                     cqe->itid, qedi_conn->iscsi_conn_id);
 841                         return;
 842                 }
 843                 qedi_conn->cmd_cleanup_cmpl++;
 844                 wake_up(&qedi_conn->wait_queue);
 845
 846                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 847                           "Freeing tid=0x%x for cid=0x%x\n",
 848                           cqe->itid, qedi_conn->iscsi_conn_id);
 849                 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
 850
 851         } else {
 852                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 853                 protoitt = build_itt(ptmp_itt, conn->session->age);
 854                 task = iscsi_itt_to_task(conn, protoitt);
 855                 QEDI_ERR(&qedi->dbg_ctx,
 856                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 857                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 858         }
 859 }
 860
 861 void qedi_fp_process_cqes(struct qedi_work *work)
 862 {
 863         struct qedi_ctx *qedi = work->qedi;
 864         union iscsi_cqe *cqe = &work->cqe;
 865         struct iscsi_task *task = NULL;
 866         struct iscsi_nopout *nopout_hdr;
 867         struct qedi_conn *q_conn;
 868         struct iscsi_conn *conn;
 869         struct qedi_cmd *qedi_cmd;
 870         u32 comp_type;
 871         u32 iscsi_cid;
 872         u32 hdr_opcode;
 873         u16 que_idx = work->que_idx;
 874         u8 cqe_err_bits = 0;
 875
 876         comp_type = cqe->cqe_common.cqe_type;
 877         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 878         cqe_err_bits =
 879                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 880
 881         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 882                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 883                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 884
 885         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 886                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 887                 return;
 888         }
 889
 890         iscsi_cid  = cqe->cqe_common.conn_id;
 891         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 892         if (!q_conn) {
 893                 QEDI_WARN(&qedi->dbg_ctx,
 894                           "Session no longer exists for cid=0x%x!!\n",
 895                           iscsi_cid);
 896                 return;
 897         }
 898
 899         conn = q_conn->cls_conn->dd_data;
 900
 901         if (unlikely(cqe_err_bits &&
 902                      GET_FIELD(cqe_err_bits,
 903                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 904                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 905                 return;
 906         }
 907
 908         switch (comp_type) {
 909         case ISCSI_CQE_TYPE_SOLICITED:
 910         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 911                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 912                 task = qedi_cmd->task;
 913                 if (!task) {
 914                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 915                         return;
 916                 }
 917
 918                 /* Process NOPIN local completion */
 919                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 920                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 921                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 922                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 923                                                       task, q_conn);
 924                 } else {
 925                         cqe->cqe_solicited.itid =
 926                                                qedi_get_itt(cqe->cqe_solicited);
 927                         /* Process other solicited responses */
 928                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 929                 }
 930                 break;
 931         case ISCSI_CQE_TYPE_UNSOLICITED:
 932                 switch (hdr_opcode) {
 933                 case ISCSI_OPCODE_NOP_IN:
 934                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 935                                                 que_idx);
 936                         break;
 937                 case ISCSI_OPCODE_ASYNC_MSG:
 938                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 939                                                 que_idx);
 940                         break;
 941                 case ISCSI_OPCODE_REJECT:
 942                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 943                                                  que_idx);
 944                         break;
 945                 }
 946                 goto exit_fp_process;
 947         case ISCSI_CQE_TYPE_DUMMY:
 948                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 949                 goto exit_fp_process;
 950         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 951                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 952                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 953                                               conn);
 954                 goto exit_fp_process;
 955         default:
 956                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 957                 break;
 958         }
 959
 960 exit_fp_process:
 961         return;
 962 }
 963
 964 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 965 {
 966         struct iscsi_db_data dbell = { 0 };
 967
 968         dbell.agg_flags = 0;
 969
 970         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 971         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 972         dbell.params |=
 973                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 974
 975         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 976         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
 977
 978         /* Make sure fw write idx is coherent, and include both memory barriers
 979          * as a failsafe as for some architectures the call is the same but on
 980          * others they are two different assembly operations.
 981          */
 982         wmb();
 983         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
 984                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
 985                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
 986                   qedi_conn->iscsi_conn_id);
 987 }
 988
 989 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
 990 {
 991         struct qedi_endpoint *ep;
 992         u16 rval;
 993
 994         ep = qedi_conn->ep;
 995         rval = ep->sq_prod_idx;
 996
 997         /* Increament SQ index */
 998         ep->sq_prod_idx++;
 999         ep->fw_sq_prod_idx++;
1000         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1001                 ep->sq_prod_idx = 0;
1002
1003         return rval;
1004 }
1005
1006 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1007                           struct iscsi_task *task)
1008 {
1009         struct iscsi_login_req_hdr login_req_pdu_header;
1010         struct scsi_sgl_task_params tx_sgl_task_params;
1011         struct scsi_sgl_task_params rx_sgl_task_params;
1012         struct iscsi_task_params task_params;
1013         struct e4_iscsi_task_context *fw_task_ctx;
1014         struct qedi_ctx *qedi = qedi_conn->qedi;
1015         struct iscsi_login_req *login_hdr;
1016         struct scsi_sge *resp_sge = NULL;
1017         struct qedi_cmd *qedi_cmd;
1018         struct qedi_endpoint *ep;
1019         s16 tid = 0;
1020         u16 sq_idx = 0;
1021         int rval = 0;
1022
1023         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1024         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1025         ep = qedi_conn->ep;
1026         login_hdr = (struct iscsi_login_req *)task->hdr;
1027
1028         tid = qedi_get_task_idx(qedi);
1029         if (tid == -1)
1030                 return -ENOMEM;
1031
1032         fw_task_ctx =
1033              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1034                                                                tid);
1035         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1036
1037         qedi_cmd->task_id = tid;
1038
1039         memset(&task_params, 0, sizeof(task_params));
1040         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1041         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1042         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1043         /* Update header info */
1044         login_req_pdu_header.opcode = login_hdr->opcode;
1045         login_req_pdu_header.version_min = login_hdr->min_version;
1046         login_req_pdu_header.version_max = login_hdr->max_version;
1047         login_req_pdu_header.flags_attr = login_hdr->flags;
1048         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1049         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1050
1051         login_req_pdu_header.tsih = login_hdr->tsih;
1052         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1053
1054         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1055         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1056         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1057         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1058         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1059         login_req_pdu_header.exp_stat_sn = 0;
1060
1061         /* Fill tx AHS and rx buffer */
1062         tx_sgl_task_params.sgl =
1063                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1064         tx_sgl_task_params.sgl_phys_addr.lo =
1065                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1066         tx_sgl_task_params.sgl_phys_addr.hi =
1067                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1068         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1069         tx_sgl_task_params.num_sges = 1;
1070
1071         rx_sgl_task_params.sgl =
1072                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1073         rx_sgl_task_params.sgl_phys_addr.lo =
1074                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1075         rx_sgl_task_params.sgl_phys_addr.hi =
1076                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1077         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1078         rx_sgl_task_params.num_sges = 1;
1079
1080         /* Fill fw input params */
1081         task_params.context = fw_task_ctx;
1082         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1083         task_params.itid = tid;
1084         task_params.cq_rss_number = 0;
1085         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1086         task_params.rx_io_size = resp_sge->sge_len;
1087
1088         sq_idx = qedi_get_wqe_idx(qedi_conn);
1089         task_params.sqe = &ep->sq[sq_idx];
1090
1091         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1092         rval = init_initiator_login_request_task(&task_params,
1093                                                  &login_req_pdu_header,
1094                                                  &tx_sgl_task_params,
1095                                                  &rx_sgl_task_params);
1096         if (rval)
1097                 return -1;
1098
1099         spin_lock(&qedi_conn->list_lock);
1100         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1101         qedi_cmd->io_cmd_in_list = true;
1102         qedi_conn->active_cmd_count++;
1103         spin_unlock(&qedi_conn->list_lock);
1104
1105         qedi_ring_doorbell(qedi_conn);
1106         return 0;
1107 }
1108
1109 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1110                            struct iscsi_task *task)
1111 {
1112         struct iscsi_logout_req_hdr logout_pdu_header;
1113         struct scsi_sgl_task_params tx_sgl_task_params;
1114         struct scsi_sgl_task_params rx_sgl_task_params;
1115         struct iscsi_task_params task_params;
1116         struct e4_iscsi_task_context *fw_task_ctx;
1117         struct iscsi_logout *logout_hdr = NULL;
1118         struct qedi_ctx *qedi = qedi_conn->qedi;
1119         struct qedi_cmd *qedi_cmd;
1120         struct qedi_endpoint *ep;
1121         s16 tid = 0;
1122         u16 sq_idx = 0;
1123         int rval = 0;
1124
1125         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1126         logout_hdr = (struct iscsi_logout *)task->hdr;
1127         ep = qedi_conn->ep;
1128
1129         tid = qedi_get_task_idx(qedi);
1130         if (tid == -1)
1131                 return -ENOMEM;
1132
1133         fw_task_ctx =
1134              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1135                                                                tid);
1136         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1137
1138         qedi_cmd->task_id = tid;
1139
1140         memset(&task_params, 0, sizeof(task_params));
1141         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1142         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1143         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1144
1145         /* Update header info */
1146         logout_pdu_header.opcode = logout_hdr->opcode;
1147         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1148         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1149         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1150         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1151         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1152         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1153
1154         /* Fill fw input params */
1155         task_params.context = fw_task_ctx;
1156         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1157         task_params.itid = tid;
1158         task_params.cq_rss_number = 0;
1159         task_params.tx_io_size = 0;
1160         task_params.rx_io_size = 0;
1161
1162         sq_idx = qedi_get_wqe_idx(qedi_conn);
1163         task_params.sqe = &ep->sq[sq_idx];
1164         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1165
1166         rval = init_initiator_logout_request_task(&task_params,
1167                                                   &logout_pdu_header,
1168                                                   NULL, NULL);
1169         if (rval)
1170                 return -1;
1171
1172         spin_lock(&qedi_conn->list_lock);
1173         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1174         qedi_cmd->io_cmd_in_list = true;
1175         qedi_conn->active_cmd_count++;
1176         spin_unlock(&qedi_conn->list_lock);
1177
1178         qedi_ring_doorbell(qedi_conn);
1179         return 0;
1180 }
1181
1182 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1183                         struct iscsi_task *task, bool in_recovery)
1184 {
1185         int rval;
1186         struct iscsi_task *ctask;
1187         struct qedi_cmd *cmd, *cmd_tmp;
1188         struct iscsi_tm *tmf_hdr;
1189         unsigned int lun = 0;
1190         bool lun_reset = false;
1191         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1192         struct iscsi_session *session = conn->session;
1193
1194         /* From recovery, task is NULL or from tmf resp valid task */
1195         if (task) {
1196                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1197
1198                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1199                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1200                         lun_reset = true;
1201                         lun = scsilun_to_int(&tmf_hdr->lun);
1202                 }
1203         }
1204
1205         qedi_conn->cmd_cleanup_req = 0;
1206         qedi_conn->cmd_cleanup_cmpl = 0;
1207
1208         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1209                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1210                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1211                   in_recovery, lun_reset);
1212
1213         if (lun_reset)
1214                 spin_lock_bh(&session->back_lock);
1215
1216         spin_lock(&qedi_conn->list_lock);
1217
1218         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1219                                  io_cmd) {
1220                 ctask = cmd->task;
1221                 if (ctask == task)
1222                         continue;
1223
1224                 if (lun_reset) {
1225                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1226                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1227                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1228                                           cmd->task_id, get_itt(ctask->itt),
1229                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1230                                           ctask->state, cmd->state,
1231                                           qedi_conn->iscsi_conn_id);
1232                                 if (cmd->scsi_cmd->device->lun != lun)
1233                                         continue;
1234                         }
1235                 }
1236                 qedi_conn->cmd_cleanup_req++;
1237                 qedi_iscsi_cleanup_task(ctask, true);
1238
1239                 list_del_init(&cmd->io_cmd);
1240                 qedi_conn->active_cmd_count--;
1241                 QEDI_WARN(&qedi->dbg_ctx,
1242                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1243                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1244         }
1245
1246         spin_unlock(&qedi_conn->list_lock);
1247
1248         if (lun_reset)
1249                 spin_unlock_bh(&session->back_lock);
1250
1251         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1252                   "cmd_cleanup_req=%d, cid=0x%x\n",
1253                   qedi_conn->cmd_cleanup_req,
1254                   qedi_conn->iscsi_conn_id);
1255
1256         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1257                                                  ((qedi_conn->cmd_cleanup_req ==
1258                                                  qedi_conn->cmd_cleanup_cmpl) ||
1259                                                  qedi_conn->ep),
1260                                                  5 * HZ);
1261         if (rval) {
1262                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1263                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1264                           qedi_conn->cmd_cleanup_req,
1265                           qedi_conn->cmd_cleanup_cmpl,
1266                           qedi_conn->iscsi_conn_id);
1267
1268                 return 0;
1269         }
1270
1271         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1272                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1273                   qedi_conn->cmd_cleanup_req,
1274                   qedi_conn->cmd_cleanup_cmpl,
1275                   qedi_conn->iscsi_conn_id);
1276
1277         iscsi_host_for_each_session(qedi->shost,
1278                                     qedi_mark_device_missing);
1279         qedi_ops->common->drain(qedi->cdev);
1280
1281         /* Enable IOs for all other sessions except current.*/
1282         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1283                                               (qedi_conn->cmd_cleanup_req ==
1284                                                qedi_conn->cmd_cleanup_cmpl),
1285                                               5 * HZ)) {
1286                 iscsi_host_for_each_session(qedi->shost,
1287                                             qedi_mark_device_available);
1288                 return -1;
1289         }
1290
1291         iscsi_host_for_each_session(qedi->shost,
1292                                     qedi_mark_device_available);
1293
1294         return 0;
1295 }
1296
1297 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1298                   struct iscsi_task *task)
1299 {
1300         struct qedi_endpoint *qedi_ep;
1301         int rval;
1302
1303         qedi_ep = qedi_conn->ep;
1304         qedi_conn->cmd_cleanup_req = 0;
1305         qedi_conn->cmd_cleanup_cmpl = 0;
1306
1307         if (!qedi_ep) {
1308                 QEDI_WARN(&qedi->dbg_ctx,
1309                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1310                           qedi_conn->iscsi_conn_id);
1311                 return;
1312         }
1313
1314         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1315                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1316                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1317
1318         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1319
1320         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1321         if (rval) {
1322                 QEDI_ERR(&qedi->dbg_ctx,
1323                          "fatal error, need hard reset, cid=0x%x\n",
1324                          qedi_conn->iscsi_conn_id);
1325                 WARN_ON(1);
1326         }
1327 }
1328
1329 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1330                                          struct qedi_conn *qedi_conn,
1331                                          struct iscsi_task *task,
1332                                          struct qedi_cmd *qedi_cmd,
1333                                          struct qedi_work_map *list_work)
1334 {
1335         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1336         int wait;
1337
1338         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1339                                                  ((qedi_cmd->state ==
1340                                                    CLEANUP_RECV) ||
1341                                                  ((qedi_cmd->type == TYPEIO) &&
1342                                                   (cmd->state ==
1343                                                    RESPONSE_RECEIVED))),
1344                                                  5 * HZ);
1345         if (!wait) {
1346                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1347
1348                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1349                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1350                           cmd->task_id, qedi_conn->iscsi_conn_id);
1351
1352                 return -1;
1353         }
1354         return 0;
1355 }
1356
1357 static void qedi_tmf_work(struct work_struct *work)
1358 {
1359         struct qedi_cmd *qedi_cmd =
1360                 container_of(work, struct qedi_cmd, tmf_work);
1361         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1362         struct qedi_ctx *qedi = qedi_conn->qedi;
1363         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1364         struct qedi_work_map *list_work = NULL;
1365         struct iscsi_task *mtask;
1366         struct qedi_cmd *cmd;
1367         struct iscsi_task *ctask;
1368         struct iscsi_tm *tmf_hdr;
1369         s16 rval = 0;
1370         s16 tid = 0;
1371
1372         mtask = qedi_cmd->task;
1373         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1374         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1375
1376         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1377         if (!ctask || !ctask->sc) {
1378                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1379                 goto abort_ret;
1380         }
1381
1382         cmd = (struct qedi_cmd *)ctask->dd_data;
1383         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1384                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1385                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1386                   qedi_conn->iscsi_conn_id);
1387
1388         if (qedi_do_not_recover) {
1389                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1390                          qedi_do_not_recover);
1391                 goto abort_ret;
1392         }
1393
1394         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1395         if (!list_work) {
1396                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1397                 goto abort_ret;
1398         }
1399
1400         qedi_cmd->type = TYPEIO;
1401         list_work->qedi_cmd = qedi_cmd;
1402         list_work->rtid = cmd->task_id;
1403         list_work->state = QEDI_WORK_SCHEDULED;
1404         qedi_cmd->list_tmf_work = list_work;
1405
1406         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1407                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1408                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1409                   tmf_hdr->flags);
1410
1411         spin_lock_bh(&qedi_conn->tmf_work_lock);
1412         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1413         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1414
1415         qedi_iscsi_cleanup_task(ctask, false);
1416
1417         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1418                                              list_work);
1419         if (rval == -1) {
1420                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1421                           "FW cleanup got escalated, cid=0x%x\n",
1422                           qedi_conn->iscsi_conn_id);
1423                 goto ldel_exit;
1424         }
1425
1426         tid = qedi_get_task_idx(qedi);
1427         if (tid == -1) {
1428                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1429                          qedi_conn->iscsi_conn_id);
1430                 goto ldel_exit;
1431         }
1432
1433         qedi_cmd->task_id = tid;
1434         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1435
1436 abort_ret:
1437         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1438         return;
1439
1440 ldel_exit:
1441         spin_lock_bh(&qedi_conn->tmf_work_lock);
1442         if (!qedi_cmd->list_tmf_work) {
1443                 list_del_init(&list_work->list);
1444                 qedi_cmd->list_tmf_work = NULL;
1445                 kfree(list_work);
1446         }
1447         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1448
1449         spin_lock(&qedi_conn->list_lock);
1450         list_del_init(&cmd->io_cmd);
1451         qedi_conn->active_cmd_count--;
1452         spin_unlock(&qedi_conn->list_lock);
1453
1454         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1455 }
1456
1457 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1458                                struct iscsi_task *mtask)
1459 {
1460         struct iscsi_tmf_request_hdr tmf_pdu_header;
1461         struct iscsi_task_params task_params;
1462         struct qedi_ctx *qedi = qedi_conn->qedi;
1463         struct e4_iscsi_task_context *fw_task_ctx;
1464         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1465         struct iscsi_task *ctask;
1466         struct iscsi_tm *tmf_hdr;
1467         struct qedi_cmd *qedi_cmd;
1468         struct qedi_cmd *cmd;
1469         struct qedi_endpoint *ep;
1470         u32 scsi_lun[2];
1471         s16 tid = 0;
1472         u16 sq_idx = 0;
1473         int rval = 0;
1474
1475         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1476         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1477         ep = qedi_conn->ep;
1478         if (!ep)
1479                 return -ENODEV;
1480
1481         tid = qedi_get_task_idx(qedi);
1482         if (tid == -1)
1483                 return -ENOMEM;
1484
1485         fw_task_ctx =
1486              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1487                                                                tid);
1488         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1489
1490         qedi_cmd->task_id = tid;
1491
1492         memset(&task_params, 0, sizeof(task_params));
1493         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1494
1495         /* Update header info */
1496         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1497         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1498         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1499
1500         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1501         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1502         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1503
1504         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1505              ISCSI_TM_FUNC_ABORT_TASK) {
1506                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1507                 if (!ctask || !ctask->sc) {
1508                         QEDI_ERR(&qedi->dbg_ctx,
1509                                  "Could not get reference task\n");
1510                         return 0;
1511                 }
1512                 cmd = (struct qedi_cmd *)ctask->dd_data;
1513                 tmf_pdu_header.rtt =
1514                                 qedi_set_itt(cmd->task_id,
1515                                              get_itt(tmf_hdr->rtt));
1516         } else {
1517                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1518         }
1519
1520         tmf_pdu_header.opcode = tmf_hdr->opcode;
1521         tmf_pdu_header.function = tmf_hdr->flags;
1522         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1523         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1524
1525         /* Fill fw input params */
1526         task_params.context = fw_task_ctx;
1527         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1528         task_params.itid = tid;
1529         task_params.cq_rss_number = 0;
1530         task_params.tx_io_size = 0;
1531         task_params.rx_io_size = 0;
1532
1533         sq_idx = qedi_get_wqe_idx(qedi_conn);
1534         task_params.sqe = &ep->sq[sq_idx];
1535
1536         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1537         rval = init_initiator_tmf_request_task(&task_params,
1538                                                &tmf_pdu_header);
1539         if (rval)
1540                 return -1;
1541
1542         spin_lock(&qedi_conn->list_lock);
1543         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1544         qedi_cmd->io_cmd_in_list = true;
1545         qedi_conn->active_cmd_count++;
1546         spin_unlock(&qedi_conn->list_lock);
1547
1548         qedi_ring_doorbell(qedi_conn);
1549         return 0;
1550 }
1551
1552 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1553                           struct iscsi_task *mtask)
1554 {
1555         struct qedi_ctx *qedi = qedi_conn->qedi;
1556         struct iscsi_tm *tmf_hdr;
1557         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1558         s16 tid = 0;
1559
1560         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1561         qedi_cmd->task = mtask;
1562
1563         /* If abort task then schedule the work and return */
1564         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1565             ISCSI_TM_FUNC_ABORT_TASK) {
1566                 qedi_cmd->state = CLEANUP_WAIT;
1567                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1568                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1569
1570         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1571                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1572                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1573                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1574                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1575                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1576                 tid = qedi_get_task_idx(qedi);
1577                 if (tid == -1) {
1578                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1579                                  qedi_conn->iscsi_conn_id);
1580                         return -1;
1581                 }
1582                 qedi_cmd->task_id = tid;
1583
1584                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1585
1586         } else {
1587                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1588                          qedi_conn->iscsi_conn_id);
1589                 return -1;
1590         }
1591
1592         return 0;
1593 }
1594
1595 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1596                          struct iscsi_task *task)
1597 {
1598         struct iscsi_text_request_hdr text_request_pdu_header;
1599         struct scsi_sgl_task_params tx_sgl_task_params;
1600         struct scsi_sgl_task_params rx_sgl_task_params;
1601         struct iscsi_task_params task_params;
1602         struct e4_iscsi_task_context *fw_task_ctx;
1603         struct qedi_ctx *qedi = qedi_conn->qedi;
1604         struct iscsi_text *text_hdr;
1605         struct scsi_sge *req_sge = NULL;
1606         struct scsi_sge *resp_sge = NULL;
1607         struct qedi_cmd *qedi_cmd;
1608         struct qedi_endpoint *ep;
1609         s16 tid = 0;
1610         u16 sq_idx = 0;
1611         int rval = 0;
1612
1613         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1614         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1615         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1616         text_hdr = (struct iscsi_text *)task->hdr;
1617         ep = qedi_conn->ep;
1618
1619         tid = qedi_get_task_idx(qedi);
1620         if (tid == -1)
1621                 return -ENOMEM;
1622
1623         fw_task_ctx =
1624              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1625                                                                tid);
1626         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1627
1628         qedi_cmd->task_id = tid;
1629
1630         memset(&task_params, 0, sizeof(task_params));
1631         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1632         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1633         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1634
1635         /* Update header info */
1636         text_request_pdu_header.opcode = text_hdr->opcode;
1637         text_request_pdu_header.flags_attr = text_hdr->flags;
1638
1639         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1640         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1641         text_request_pdu_header.ttt = text_hdr->ttt;
1642         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1643         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1644         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1645
1646         /* Fill tx AHS and rx buffer */
1647         tx_sgl_task_params.sgl =
1648                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1649         tx_sgl_task_params.sgl_phys_addr.lo =
1650                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1651         tx_sgl_task_params.sgl_phys_addr.hi =
1652                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1653         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1654         tx_sgl_task_params.num_sges = 1;
1655
1656         rx_sgl_task_params.sgl =
1657                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1658         rx_sgl_task_params.sgl_phys_addr.lo =
1659                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1660         rx_sgl_task_params.sgl_phys_addr.hi =
1661                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1662         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1663         rx_sgl_task_params.num_sges = 1;
1664
1665         /* Fill fw input params */
1666         task_params.context = fw_task_ctx;
1667         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1668         task_params.itid = tid;
1669         task_params.cq_rss_number = 0;
1670         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1671         task_params.rx_io_size = resp_sge->sge_len;
1672
1673         sq_idx = qedi_get_wqe_idx(qedi_conn);
1674         task_params.sqe = &ep->sq[sq_idx];
1675
1676         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1677         rval = init_initiator_text_request_task(&task_params,
1678                                                 &text_request_pdu_header,
1679                                                 &tx_sgl_task_params,
1680                                                 &rx_sgl_task_params);
1681         if (rval)
1682                 return -1;
1683
1684         spin_lock(&qedi_conn->list_lock);
1685         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1686         qedi_cmd->io_cmd_in_list = true;
1687         qedi_conn->active_cmd_count++;
1688         spin_unlock(&qedi_conn->list_lock);
1689
1690         qedi_ring_doorbell(qedi_conn);
1691         return 0;
1692 }
1693
1694 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1695                            struct iscsi_task *task,
1696                            char *datap, int data_len, int unsol)
1697 {
1698         struct iscsi_nop_out_hdr nop_out_pdu_header;
1699         struct scsi_sgl_task_params tx_sgl_task_params;
1700         struct scsi_sgl_task_params rx_sgl_task_params;
1701         struct iscsi_task_params task_params;
1702         struct qedi_ctx *qedi = qedi_conn->qedi;
1703         struct e4_iscsi_task_context *fw_task_ctx;
1704         struct iscsi_nopout *nopout_hdr;
1705         struct scsi_sge *resp_sge = NULL;
1706         struct qedi_cmd *qedi_cmd;
1707         struct qedi_endpoint *ep;
1708         u32 scsi_lun[2];
1709         s16 tid = 0;
1710         u16 sq_idx = 0;
1711         int rval = 0;
1712
1713         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1714         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1715         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1716         ep = qedi_conn->ep;
1717
1718         tid = qedi_get_task_idx(qedi);
1719         if (tid == -1)
1720                 return -ENOMEM;
1721
1722         fw_task_ctx =
1723              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1724                                                                tid);
1725         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1726
1727         qedi_cmd->task_id = tid;
1728
1729         memset(&task_params, 0, sizeof(task_params));
1730         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1731         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1732         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1733
1734         /* Update header info */
1735         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1736         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1737         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1738
1739         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1740         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1741         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1742         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1743         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1744
1745         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1746
1747         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1748                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1749                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1750         } else {
1751                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1752                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1753
1754                 spin_lock(&qedi_conn->list_lock);
1755                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1756                 qedi_cmd->io_cmd_in_list = true;
1757                 qedi_conn->active_cmd_count++;
1758                 spin_unlock(&qedi_conn->list_lock);
1759         }
1760
1761         /* Fill tx AHS and rx buffer */
1762         if (data_len) {
1763                 tx_sgl_task_params.sgl =
1764                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1765                 tx_sgl_task_params.sgl_phys_addr.lo =
1766                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1767                 tx_sgl_task_params.sgl_phys_addr.hi =
1768                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1769                 tx_sgl_task_params.total_buffer_size = data_len;
1770                 tx_sgl_task_params.num_sges = 1;
1771
1772                 rx_sgl_task_params.sgl =
1773                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1774                 rx_sgl_task_params.sgl_phys_addr.lo =
1775                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1776                 rx_sgl_task_params.sgl_phys_addr.hi =
1777                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1778                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1779                 rx_sgl_task_params.num_sges = 1;
1780         }
1781
1782         /* Fill fw input params */
1783         task_params.context = fw_task_ctx;
1784         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1785         task_params.itid = tid;
1786         task_params.cq_rss_number = 0;
1787         task_params.tx_io_size = data_len;
1788         task_params.rx_io_size = resp_sge->sge_len;
1789
1790         sq_idx = qedi_get_wqe_idx(qedi_conn);
1791         task_params.sqe = &ep->sq[sq_idx];
1792
1793         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1794         rval = init_initiator_nop_out_task(&task_params,
1795                                            &nop_out_pdu_header,
1796                                            &tx_sgl_task_params,
1797                                            &rx_sgl_task_params);
1798         if (rval)
1799                 return -1;
1800
1801         qedi_ring_doorbell(qedi_conn);
1802         return 0;
1803 }
1804
1805 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1806                          int bd_index)
1807 {
1808         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1809         int frag_size, sg_frags;
1810
1811         sg_frags = 0;
1812
1813         while (sg_len) {
1814                 if (addr % QEDI_PAGE_SIZE)
1815                         frag_size =
1816                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1817                 else
1818                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1819                                     (sg_len % QEDI_BD_SPLIT_SZ);
1820
1821                 if (frag_size == 0)
1822                         frag_size = QEDI_BD_SPLIT_SZ;
1823
1824                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1825                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1826                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1827                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1828                           "split sge %d: addr=%llx, len=%x",
1829                           (bd_index + sg_frags), addr, frag_size);
1830
1831                 addr += (u64)frag_size;
1832                 sg_frags++;
1833                 sg_len -= frag_size;
1834         }
1835         return sg_frags;
1836 }
1837
1838 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1839 {
1840         struct scsi_cmnd *sc = cmd->scsi_cmd;
1841         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1842         struct scatterlist *sg;
1843         int byte_count = 0;
1844         int bd_count = 0;
1845         int sg_count;
1846         int sg_len;
1847         int sg_frags;
1848         u64 addr, end_addr;
1849         int i;
1850
1851         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1852
1853         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1854                               scsi_sg_count(sc), sc->sc_data_direction);
1855
1856         /*
1857          * New condition to send single SGE as cached-SGL.
1858          * Single SGE with length less than 64K.
1859          */
1860         sg = scsi_sglist(sc);
1861         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1862                 sg_len = sg_dma_len(sg);
1863                 addr = (u64)sg_dma_address(sg);
1864
1865                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1866                 bd[bd_count].sge_addr.hi = (addr >> 32);
1867                 bd[bd_count].sge_len = (u16)sg_len;
1868
1869                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1870                           "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1871                           sg_count, addr, sg_len);
1872
1873                 return ++bd_count;
1874         }
1875
1876         scsi_for_each_sg(sc, sg, sg_count, i) {
1877                 sg_len = sg_dma_len(sg);
1878                 addr = (u64)sg_dma_address(sg);
1879                 end_addr = (addr + sg_len);
1880
1881                 /*
1882                  * first sg elem in the 'list',
1883                  * check if end addr is page-aligned.
1884                  */
1885                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1886                         cmd->use_slowpath = true;
1887
1888                 /*
1889                  * last sg elem in the 'list',
1890                  * check if start addr is page-aligned.
1891                  */
1892                 else if ((i == (sg_count - 1)) &&
1893                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1894                         cmd->use_slowpath = true;
1895
1896                 /*
1897                  * middle sg elements in list,
1898                  * check if start and end addr is page-aligned
1899                  */
1900                 else if ((i != 0) && (i != (sg_count - 1)) &&
1901                          ((addr % QEDI_PAGE_SIZE) ||
1902                          (end_addr % QEDI_PAGE_SIZE)))
1903                         cmd->use_slowpath = true;
1904
1905                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1906                           i, sg_len);
1907
1908                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1909                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1910                 } else {
1911                         sg_frags = 1;
1912                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1913                         bd[bd_count].sge_addr.hi = addr >> 32;
1914                         bd[bd_count].sge_len = sg_len;
1915                 }
1916                 byte_count += sg_len;
1917                 bd_count += sg_frags;
1918         }
1919
1920         if (byte_count != scsi_bufflen(sc))
1921                 QEDI_ERR(&qedi->dbg_ctx,
1922                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1923                          scsi_bufflen(sc));
1924         else
1925                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1926                           byte_count);
1927
1928         WARN_ON(byte_count != scsi_bufflen(sc));
1929
1930         return bd_count;
1931 }
1932
1933 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1934 {
1935         int bd_count;
1936         struct scsi_cmnd *sc = cmd->scsi_cmd;
1937
1938         if (scsi_sg_count(sc)) {
1939                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1940                 if (bd_count == 0)
1941                         return;
1942         } else {
1943                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1944
1945                 bd[0].sge_addr.lo = 0;
1946                 bd[0].sge_addr.hi = 0;
1947                 bd[0].sge_len = 0;
1948                 bd_count = 0;
1949         }
1950         cmd->io_tbl.sge_valid = bd_count;
1951 }
1952
1953 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1954 {
1955         u32 dword;
1956         int lpcnt;
1957         u8 *srcp;
1958
1959         lpcnt = sc->cmd_len / sizeof(dword);
1960         srcp = (u8 *)sc->cmnd;
1961         while (lpcnt--) {
1962                 memcpy(&dword, (const void *)srcp, 4);
1963                 *dstp = cpu_to_be32(dword);
1964                 srcp += 4;
1965                 dstp++;
1966         }
1967         if (sc->cmd_len & 0x3) {
1968                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1969                 *dstp = cpu_to_be32(dword);
1970         }
1971 }
1972
1973 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1974                    u16 tid, int8_t direction)
1975 {
1976         struct qedi_io_log *io_log;
1977         struct iscsi_conn *conn = task->conn;
1978         struct qedi_conn *qedi_conn = conn->dd_data;
1979         struct scsi_cmnd *sc_cmd = task->sc;
1980         unsigned long flags;
1981
1982         spin_lock_irqsave(&qedi->io_trace_lock, flags);
1983
1984         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1985         io_log->direction = direction;
1986         io_log->task_id = tid;
1987         io_log->cid = qedi_conn->iscsi_conn_id;
1988         io_log->lun = sc_cmd->device->lun;
1989         io_log->op = sc_cmd->cmnd[0];
1990         io_log->lba[0] = sc_cmd->cmnd[2];
1991         io_log->lba[1] = sc_cmd->cmnd[3];
1992         io_log->lba[2] = sc_cmd->cmnd[4];
1993         io_log->lba[3] = sc_cmd->cmnd[5];
1994         io_log->bufflen = scsi_bufflen(sc_cmd);
1995         io_log->sg_count = scsi_sg_count(sc_cmd);
1996         io_log->fast_sgs = qedi->fast_sgls;
1997         io_log->cached_sgs = qedi->cached_sgls;
1998         io_log->slow_sgs = qedi->slow_sgls;
1999         io_log->cached_sge = qedi->use_cached_sge;
2000         io_log->slow_sge = qedi->use_slow_sge;
2001         io_log->fast_sge = qedi->use_fast_sge;
2002         io_log->result = sc_cmd->result;
2003         io_log->jiffies = jiffies;
2004         io_log->blk_req_cpu = smp_processor_id();
2005
2006         if (direction == QEDI_IO_TRACE_REQ) {
2007                 /* For requests we only care about the submission CPU */
2008                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2009                 io_log->intr_cpu = 0;
2010                 io_log->blk_rsp_cpu = 0;
2011         } else if (direction == QEDI_IO_TRACE_RSP) {
2012                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2013                 io_log->intr_cpu = qedi->intr_cpu;
2014                 io_log->blk_rsp_cpu = smp_processor_id();
2015         }
2016
2017         qedi->io_trace_idx++;
2018         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2019                 qedi->io_trace_idx = 0;
2020
2021         qedi->use_cached_sge = false;
2022         qedi->use_slow_sge = false;
2023         qedi->use_fast_sge = false;
2024
2025         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2026 }
2027
2028 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2029 {
2030         struct iscsi_conn *conn = task->conn;
2031         struct iscsi_session *session = conn->session;
2032         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2033         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2034         struct qedi_conn *qedi_conn = conn->dd_data;
2035         struct qedi_cmd *cmd = task->dd_data;
2036         struct scsi_cmnd *sc = task->sc;
2037         struct iscsi_cmd_hdr cmd_pdu_header;
2038         struct scsi_sgl_task_params tx_sgl_task_params;
2039         struct scsi_sgl_task_params rx_sgl_task_params;
2040         struct scsi_sgl_task_params *prx_sgl = NULL;
2041         struct scsi_sgl_task_params *ptx_sgl = NULL;
2042         struct iscsi_task_params task_params;
2043         struct iscsi_conn_params conn_params;
2044         struct scsi_initiator_cmd_params cmd_params;
2045         struct e4_iscsi_task_context *fw_task_ctx;
2046         struct iscsi_cls_conn *cls_conn;
2047         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2048         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2049         struct qedi_endpoint *ep;
2050         u32 scsi_lun[2];
2051         s16 tid = 0;
2052         u16 sq_idx = 0;
2053         u16 cq_idx;
2054         int rval = 0;
2055
2056         ep = qedi_conn->ep;
2057         cls_conn = qedi_conn->cls_conn;
2058         conn = cls_conn->dd_data;
2059
2060         qedi_iscsi_map_sg_list(cmd);
2061         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2062
2063         tid = qedi_get_task_idx(qedi);
2064         if (tid == -1)
2065                 return -ENOMEM;
2066
2067         fw_task_ctx =
2068              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2069                                                                tid);
2070         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2071
2072         cmd->task_id = tid;
2073
2074         memset(&task_params, 0, sizeof(task_params));
2075         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2076         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2077         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2078         memset(&conn_params, 0, sizeof(conn_params));
2079         memset(&cmd_params, 0, sizeof(cmd_params));
2080
2081         cq_idx = smp_processor_id() % qedi->num_queues;
2082         /* Update header info */
2083         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2084                   ISCSI_ATTR_SIMPLE);
2085         if (hdr->cdb[0] != TEST_UNIT_READY) {
2086                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2087                         SET_FIELD(cmd_pdu_header.flags_attr,
2088                                   ISCSI_CMD_HDR_WRITE, 1);
2089                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2090                 } else {
2091                         SET_FIELD(cmd_pdu_header.flags_attr,
2092                                   ISCSI_CMD_HDR_READ, 1);
2093                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2094                 }
2095         }
2096
2097         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2098         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2099
2100         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2101         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2102         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2103         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2104         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2105         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2106         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2107
2108         /* Fill tx AHS and rx buffer */
2109         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2110                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2111                 tx_sgl_task_params.sgl_phys_addr.lo =
2112                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2113                 tx_sgl_task_params.sgl_phys_addr.hi =
2114                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2115                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2116                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2117                 if (cmd->use_slowpath)
2118                         tx_sgl_task_params.small_mid_sge = true;
2119         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2120                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2121                 rx_sgl_task_params.sgl_phys_addr.lo =
2122                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2123                 rx_sgl_task_params.sgl_phys_addr.hi =
2124                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2125                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2126                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2127         }
2128
2129         /* Add conn param */
2130         conn_params.first_burst_length = conn->session->first_burst;
2131         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2132         conn_params.max_burst_length = conn->session->max_burst;
2133         if (conn->session->initial_r2t_en)
2134                 conn_params.initial_r2t = true;
2135         if (conn->session->imm_data_en)
2136                 conn_params.immediate_data = true;
2137
2138         /* Add cmd params */
2139         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2140         cmd_params.sense_data_buffer_phys_addr.hi =
2141                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2142         /* Fill fw input params */
2143         task_params.context = fw_task_ctx;
2144         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2145         task_params.itid = tid;
2146         task_params.cq_rss_number = cq_idx;
2147         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2148                 task_params.tx_io_size = scsi_bufflen(sc);
2149         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2150                 task_params.rx_io_size = scsi_bufflen(sc);
2151
2152         sq_idx = qedi_get_wqe_idx(qedi_conn);
2153         task_params.sqe = &ep->sq[sq_idx];
2154
2155         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2156                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2157                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2158                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2159                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2160                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2161                   (u32)(cmd->io_tbl.sge_tbl_dma),
2162                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2163
2164         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2165
2166         if (task_params.tx_io_size != 0)
2167                 ptx_sgl = &tx_sgl_task_params;
2168         if (task_params.rx_io_size != 0)
2169                 prx_sgl = &rx_sgl_task_params;
2170
2171         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2172                                             &cmd_params, &cmd_pdu_header,
2173                                             ptx_sgl, prx_sgl,
2174                                             NULL);
2175         if (rval)
2176                 return -1;
2177
2178         spin_lock(&qedi_conn->list_lock);
2179         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2180         cmd->io_cmd_in_list = true;
2181         qedi_conn->active_cmd_count++;
2182         spin_unlock(&qedi_conn->list_lock);
2183
2184         qedi_ring_doorbell(qedi_conn);
2185         return 0;
2186 }
2187
2188 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2189 {
2190         struct iscsi_task_params task_params;
2191         struct qedi_endpoint *ep;
2192         struct iscsi_conn *conn = task->conn;
2193         struct qedi_conn *qedi_conn = conn->dd_data;
2194         struct qedi_cmd *cmd = task->dd_data;
2195         u16 sq_idx = 0;
2196         int rval = 0;
2197
2198         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2199                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2200                   cmd->task_id, get_itt(task->itt), task->state,
2201                   cmd->state, qedi_conn->iscsi_conn_id);
2202
2203         memset(&task_params, 0, sizeof(task_params));
2204         ep = qedi_conn->ep;
2205
2206         sq_idx = qedi_get_wqe_idx(qedi_conn);
2207
2208         task_params.sqe = &ep->sq[sq_idx];
2209         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2210         task_params.itid = cmd->task_id;
2211
2212         rval = init_cleanup_task(&task_params);
2213         if (rval)
2214                 return rval;
2215
2216         qedi_ring_doorbell(qedi_conn);
2217         return 0;
2218 }