drivers/scsi/qedi/qedi_fw.c

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include <linux/blkdev.h>
  11 #include <scsi/scsi_tcq.h>
  12 #include <linux/delay.h>
  13
  14 #include "qedi.h"
  15 #include "qedi_iscsi.h"
  16 #include "qedi_gbl.h"
  17 #include "qedi_fw_iscsi.h"
  18 #include "qedi_fw_scsi.h"
  19
  20 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
  21                                struct iscsi_task *mtask);
  22
  23 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
  24 {
  25         struct scsi_cmnd *sc = cmd->scsi_cmd;
  26
  27         if (cmd->io_tbl.sge_valid && sc) {
  28                 cmd->io_tbl.sge_valid = 0;
  29                 scsi_dma_unmap(sc);
  30         }
  31 }
  32
  33 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
  34                                      union iscsi_cqe *cqe,
  35                                      struct iscsi_task *task,
  36                                      struct qedi_conn *qedi_conn)
  37 {
  38         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  39         struct iscsi_logout_rsp *resp_hdr;
  40         struct iscsi_session *session = conn->session;
  41         struct iscsi_logout_response_hdr *cqe_logout_response;
  42         struct qedi_cmd *cmd;
  43
  44         cmd = (struct qedi_cmd *)task->dd_data;
  45         cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
  46         spin_lock(&session->back_lock);
  47         resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  48         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
  49         resp_hdr->opcode = cqe_logout_response->opcode;
  50         resp_hdr->flags = cqe_logout_response->flags;
  51         resp_hdr->hlength = 0;
  52
  53         resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
  54         resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
  55         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
  56         resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
  57
  58         resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
  59         resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
  60
  61         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
  62                   "Freeing tid=0x%x for cid=0x%x\n",
  63                   cmd->task_id, qedi_conn->iscsi_conn_id);
  64
  65         if (likely(cmd->io_cmd_in_list)) {
  66                 cmd->io_cmd_in_list = false;
  67                 list_del_init(&cmd->io_cmd);
  68                 qedi_conn->active_cmd_count--;
  69         } else {
  70                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  71                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
  72                           cmd->task_id, qedi_conn->iscsi_conn_id,
  73                           &cmd->io_cmd);
  74         }
  75
  76         cmd->state = RESPONSE_RECEIVED;
  77         qedi_clear_task_idx(qedi, cmd->task_id);
  78         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
  79
  80         spin_unlock(&session->back_lock);
  81 }
  82
  83 static void qedi_process_text_resp(struct qedi_ctx *qedi,
  84                                    union iscsi_cqe *cqe,
  85                                    struct iscsi_task *task,
  86                                    struct qedi_conn *qedi_conn)
  87 {
  88         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  89         struct iscsi_session *session = conn->session;
  90         struct e4_iscsi_task_context *task_ctx;
  91         struct iscsi_text_rsp *resp_hdr_ptr;
  92         struct iscsi_text_response_hdr *cqe_text_response;
  93         struct qedi_cmd *cmd;
  94         int pld_len;
  95
  96         cmd = (struct qedi_cmd *)task->dd_data;
  97         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
  98
  99         cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
 100         spin_lock(&session->back_lock);
 101         resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 102         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
 103         resp_hdr_ptr->opcode = cqe_text_response->opcode;
 104         resp_hdr_ptr->flags = cqe_text_response->flags;
 105         resp_hdr_ptr->hlength = 0;
 106
 107         hton24(resp_hdr_ptr->dlength,
 108                (cqe_text_response->hdr_second_dword &
 109                 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 110
 111         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 112                                       conn->session->age);
 113         resp_hdr_ptr->ttt = cqe_text_response->ttt;
 114         resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
 115         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
 116         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
 117
 118         pld_len = cqe_text_response->hdr_second_dword &
 119                   ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 120         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 121
 122         memset(task_ctx, '\0', sizeof(*task_ctx));
 123
 124         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 125                   "Freeing tid=0x%x for cid=0x%x\n",
 126                   cmd->task_id, qedi_conn->iscsi_conn_id);
 127
 128         if (likely(cmd->io_cmd_in_list)) {
 129                 cmd->io_cmd_in_list = false;
 130                 list_del_init(&cmd->io_cmd);
 131                 qedi_conn->active_cmd_count--;
 132         } else {
 133                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 134                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
 135                           cmd->task_id, qedi_conn->iscsi_conn_id,
 136                           &cmd->io_cmd);
 137         }
 138
 139         cmd->state = RESPONSE_RECEIVED;
 140         qedi_clear_task_idx(qedi, cmd->task_id);
 141
 142         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 143                              qedi_conn->gen_pdu.resp_buf,
 144                              (qedi_conn->gen_pdu.resp_wr_ptr -
 145                               qedi_conn->gen_pdu.resp_buf));
 146         spin_unlock(&session->back_lock);
 147 }
 148
 149 static void qedi_tmf_resp_work(struct work_struct *work)
 150 {
 151         struct qedi_cmd *qedi_cmd =
 152                                 container_of(work, struct qedi_cmd, tmf_work);
 153         struct qedi_conn *qedi_conn = qedi_cmd->conn;
 154         struct qedi_ctx *qedi = qedi_conn->qedi;
 155         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 156         struct iscsi_session *session = conn->session;
 157         struct iscsi_tm_rsp *resp_hdr_ptr;
 158         int rval = 0;
 159
 160         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 161         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 162
 163         iscsi_block_session(session->cls_session);
 164         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 165         if (rval) {
 166                 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 167                 iscsi_unblock_session(session->cls_session);
 168                 goto exit_tmf_resp;
 169         }
 170
 171         iscsi_unblock_session(session->cls_session);
 172         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 173
 174         spin_lock(&session->back_lock);
 175         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 176         spin_unlock(&session->back_lock);
 177
 178 exit_tmf_resp:
 179         kfree(resp_hdr_ptr);
 180         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 181 }
 182
 183 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 184                                   union iscsi_cqe *cqe,
 185                                   struct iscsi_task *task,
 186                                   struct qedi_conn *qedi_conn)
 187
 188 {
 189         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 190         struct iscsi_session *session = conn->session;
 191         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 192         struct iscsi_tm_rsp *resp_hdr_ptr;
 193         struct iscsi_tm *tmf_hdr;
 194         struct qedi_cmd *qedi_cmd = NULL;
 195
 196         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 197
 198         qedi_cmd = task->dd_data;
 199         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
 200         if (!qedi_cmd->tmf_resp_buf) {
 201                 QEDI_ERR(&qedi->dbg_ctx,
 202                          "Failed to allocate resp buf, cid=0x%x\n",
 203                           qedi_conn->iscsi_conn_id);
 204                 return;
 205         }
 206
 207         spin_lock(&session->back_lock);
 208         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 209         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 210
 211         /* Fill up the header */
 212         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 213         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 214         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 215         resp_hdr_ptr->hlength = 0;
 216
 217         hton24(resp_hdr_ptr->dlength,
 218                (cqe_tmp_response->hdr_second_dword &
 219                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 220         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 221                                       conn->session->age);
 222         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 223         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 224         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 225
 226         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 227
 228         if (likely(qedi_cmd->io_cmd_in_list)) {
 229                 qedi_cmd->io_cmd_in_list = false;
 230                 list_del_init(&qedi_cmd->io_cmd);
 231                 qedi_conn->active_cmd_count--;
 232         }
 233
 234         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 235               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 236             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 237               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 238             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 239               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 240                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 241                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 242                 goto unblock_sess;
 243         }
 244
 245         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 246
 247         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 248         kfree(resp_hdr_ptr);
 249
 250 unblock_sess:
 251         spin_unlock(&session->back_lock);
 252 }
 253
 254 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 255                                     union iscsi_cqe *cqe,
 256                                     struct iscsi_task *task,
 257                                     struct qedi_conn *qedi_conn)
 258 {
 259         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 260         struct iscsi_session *session = conn->session;
 261         struct e4_iscsi_task_context *task_ctx;
 262         struct iscsi_login_rsp *resp_hdr_ptr;
 263         struct iscsi_login_response_hdr *cqe_login_response;
 264         struct qedi_cmd *cmd;
 265         int pld_len;
 266
 267         cmd = (struct qedi_cmd *)task->dd_data;
 268
 269         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 270         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 271
 272         spin_lock(&session->back_lock);
 273         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 274         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 275         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 276         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 277         resp_hdr_ptr->hlength = 0;
 278
 279         hton24(resp_hdr_ptr->dlength,
 280                (cqe_login_response->hdr_second_dword &
 281                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 282         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 283                                       conn->session->age);
 284         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 285         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 286         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 287         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 288         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 289         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 290         pld_len = cqe_login_response->hdr_second_dword &
 291                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 292         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 293
 294         if (likely(cmd->io_cmd_in_list)) {
 295                 cmd->io_cmd_in_list = false;
 296                 list_del_init(&cmd->io_cmd);
 297                 qedi_conn->active_cmd_count--;
 298         }
 299
 300         memset(task_ctx, '\0', sizeof(*task_ctx));
 301
 302         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 303                              qedi_conn->gen_pdu.resp_buf,
 304                              (qedi_conn->gen_pdu.resp_wr_ptr -
 305                              qedi_conn->gen_pdu.resp_buf));
 306
 307         spin_unlock(&session->back_lock);
 308         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 309                   "Freeing tid=0x%x for cid=0x%x\n",
 310                   cmd->task_id, qedi_conn->iscsi_conn_id);
 311         cmd->state = RESPONSE_RECEIVED;
 312         qedi_clear_task_idx(qedi, cmd->task_id);
 313 }
 314
 315 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 316                                 struct iscsi_cqe_unsolicited *cqe,
 317                                 char *ptr, int len)
 318 {
 319         u16 idx = 0;
 320
 321         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 322                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 323                   len, qedi->bdq_prod_idx,
 324                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 325
 326         /* Obtain buffer address from rqe_opaque */
 327         idx = cqe->rqe_opaque;
 328         if (idx > (QEDI_BDQ_NUM - 1)) {
 329                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 330                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 331                           idx);
 332                 return;
 333         }
 334
 335         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 336                   "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
 337
 338         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 339                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 340         switch (cqe->unsol_cqe_type) {
 341         case ISCSI_CQE_UNSOLICITED_SINGLE:
 342         case ISCSI_CQE_UNSOLICITED_FIRST:
 343                 if (len)
 344                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 345                 break;
 346         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 347         case ISCSI_CQE_UNSOLICITED_LAST:
 348                 break;
 349         default:
 350                 break;
 351         }
 352 }
 353
 354 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 355                                 struct iscsi_cqe_unsolicited *cqe,
 356                                 int count)
 357 {
 358         u16 tmp;
 359         u16 idx = 0;
 360         struct scsi_bd *pbl;
 361
 362         /* Obtain buffer address from rqe_opaque */
 363         idx = cqe->rqe_opaque;
 364         if (idx > (QEDI_BDQ_NUM - 1)) {
 365                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 366                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 367                           idx);
 368                 return;
 369         }
 370
 371         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 372         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 373         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 374         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 375         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 376                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 377                   pbl, pbl->address.hi, pbl->address.lo, idx);
 378         pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
 379         pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
 380         pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
 381         pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
 382
 383         /* Increment producer to let f/w know we've handled the frame */
 384         qedi->bdq_prod_idx += count;
 385
 386         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 387         tmp = readw(qedi->bdq_primary_prod);
 388
 389         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 390         tmp = readw(qedi->bdq_secondary_prod);
 391 }
 392
 393 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 394                                       struct iscsi_cqe_unsolicited *cqe,
 395                                       u32 pdu_len, u32 num_bdqs,
 396                                       char *bdq_data)
 397 {
 398         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 399                   "num_bdqs [%d]\n", num_bdqs);
 400
 401         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 402         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 403 }
 404
 405 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 406                                    union iscsi_cqe *cqe,
 407                                    struct iscsi_task *task,
 408                                    struct qedi_conn *qedi_conn, u16 que_idx)
 409 {
 410         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 411         struct iscsi_session *session = conn->session;
 412         struct iscsi_nop_in_hdr *cqe_nop_in;
 413         struct iscsi_nopin *hdr;
 414         struct qedi_cmd *cmd;
 415         int tgt_async_nop = 0;
 416         u32 lun[2];
 417         u32 pdu_len, num_bdqs;
 418         char bdq_data[QEDI_BDQ_BUF_SIZE];
 419         unsigned long flags;
 420
 421         spin_lock_bh(&session->back_lock);
 422         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 423
 424         pdu_len = cqe_nop_in->hdr_second_dword &
 425                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 426         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 427
 428         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 429         memset(hdr, 0, sizeof(struct iscsi_hdr));
 430         hdr->opcode = cqe_nop_in->opcode;
 431         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 432         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 433         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 434         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 435
 436         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 437                 spin_lock_irqsave(&qedi->hba_lock, flags);
 438                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 439                                           pdu_len, num_bdqs, bdq_data);
 440                 hdr->itt = RESERVED_ITT;
 441                 tgt_async_nop = 1;
 442                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 443                 goto done;
 444         }
 445
 446         /* Response to one of our nop-outs */
 447         if (task) {
 448                 cmd = task->dd_data;
 449                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 450                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 451                                      conn->session->age);
 452                 lun[0] = 0xffffffff;
 453                 lun[1] = 0xffffffff;
 454                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 455                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 456                           "Freeing tid=0x%x for cid=0x%x\n",
 457                           cmd->task_id, qedi_conn->iscsi_conn_id);
 458                 cmd->state = RESPONSE_RECEIVED;
 459                 spin_lock(&qedi_conn->list_lock);
 460                 if (likely(cmd->io_cmd_in_list)) {
 461                         cmd->io_cmd_in_list = false;
 462                         list_del_init(&cmd->io_cmd);
 463                         qedi_conn->active_cmd_count--;
 464                 }
 465
 466                 spin_unlock(&qedi_conn->list_lock);
 467                 qedi_clear_task_idx(qedi, cmd->task_id);
 468         }
 469
 470 done:
 471         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 472
 473         spin_unlock_bh(&session->back_lock);
 474         return tgt_async_nop;
 475 }
 476
 477 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 478                                     union iscsi_cqe *cqe,
 479                                     struct iscsi_task *task,
 480                                     struct qedi_conn *qedi_conn,
 481                                     u16 que_idx)
 482 {
 483         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 484         struct iscsi_session *session = conn->session;
 485         struct iscsi_async_msg_hdr *cqe_async_msg;
 486         struct iscsi_async *resp_hdr;
 487         u32 lun[2];
 488         u32 pdu_len, num_bdqs;
 489         char bdq_data[QEDI_BDQ_BUF_SIZE];
 490         unsigned long flags;
 491
 492         spin_lock_bh(&session->back_lock);
 493
 494         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 495         pdu_len = cqe_async_msg->hdr_second_dword &
 496                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 497         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 498
 499         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 500                 spin_lock_irqsave(&qedi->hba_lock, flags);
 501                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 502                                           pdu_len, num_bdqs, bdq_data);
 503                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 504         }
 505
 506         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 507         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 508         resp_hdr->opcode = cqe_async_msg->opcode;
 509         resp_hdr->flags = 0x80;
 510
 511         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 512         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 513         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 514         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 515         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 516         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 517
 518         resp_hdr->async_event = cqe_async_msg->async_event;
 519         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 520
 521         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 522         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 523         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 524
 525         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 526                              pdu_len);
 527
 528         spin_unlock_bh(&session->back_lock);
 529 }
 530
 531 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 532                                      union iscsi_cqe *cqe,
 533                                      struct iscsi_task *task,
 534                                      struct qedi_conn *qedi_conn,
 535                                      uint16_t que_idx)
 536 {
 537         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 538         struct iscsi_session *session = conn->session;
 539         struct iscsi_reject_hdr *cqe_reject;
 540         struct iscsi_reject *hdr;
 541         u32 pld_len, num_bdqs;
 542         unsigned long flags;
 543
 544         spin_lock_bh(&session->back_lock);
 545         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 546         pld_len = cqe_reject->hdr_second_dword &
 547                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 548         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 549
 550         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 551                 spin_lock_irqsave(&qedi->hba_lock, flags);
 552                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 553                                           pld_len, num_bdqs, conn->data);
 554                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 555         }
 556         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 557         memset(hdr, 0, sizeof(struct iscsi_hdr));
 558         hdr->opcode = cqe_reject->opcode;
 559         hdr->reason = cqe_reject->hdr_reason;
 560         hdr->flags = cqe_reject->hdr_flags;
 561         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 562                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 563         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 564         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 565         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 566         hdr->ffffffff = cpu_to_be32(0xffffffff);
 567
 568         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 569                              conn->data, pld_len);
 570         spin_unlock_bh(&session->back_lock);
 571 }
 572
 573 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 574                                  union iscsi_cqe *cqe,
 575                                  struct iscsi_task *task,
 576                                  struct iscsi_conn *conn)
 577 {
 578         struct scsi_cmnd *sc_cmd;
 579         struct qedi_cmd *cmd = task->dd_data;
 580         struct iscsi_session *session = conn->session;
 581         struct iscsi_scsi_rsp *hdr;
 582         struct iscsi_data_in_hdr *cqe_data_in;
 583         int datalen = 0;
 584         struct qedi_conn *qedi_conn;
 585         u32 iscsi_cid;
 586         u8 cqe_err_bits = 0;
 587
 588         iscsi_cid  = cqe->cqe_common.conn_id;
 589         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 590
 591         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 592         cqe_err_bits =
 593                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 594
 595         spin_lock_bh(&session->back_lock);
 596         /* get the scsi command */
 597         sc_cmd = cmd->scsi_cmd;
 598
 599         if (!sc_cmd) {
 600                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 601                 goto error;
 602         }
 603
 604         if (!sc_cmd->SCp.ptr) {
 605                 QEDI_WARN(&qedi->dbg_ctx,
 606                           "SCp.ptr is NULL, returned in another context.\n");
 607                 goto error;
 608         }
 609
 610         if (!sc_cmd->request) {
 611                 QEDI_WARN(&qedi->dbg_ctx,
 612                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 613                           sc_cmd);
 614                 goto error;
 615         }
 616
 617         if (!sc_cmd->request->q) {
 618                 QEDI_WARN(&qedi->dbg_ctx,
 619                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 620                           sc_cmd);
 621                 goto error;
 622         }
 623
 624         qedi_iscsi_unmap_sg_list(cmd);
 625
 626         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 627         hdr->opcode = cqe_data_in->opcode;
 628         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 629         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 630         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 631         hdr->response = cqe_data_in->reserved1;
 632         hdr->cmd_status = cqe_data_in->status_rsvd;
 633         hdr->flags = cqe_data_in->flags;
 634         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 635
 636         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 637                 datalen = cqe_data_in->reserved2 &
 638                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 639                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 640         }
 641
 642         /* If f/w reports data underrun err then set residual to IO transfer
 643          * length, set Underrun flag and clear Overrun flag explicitly
 644          */
 645         if (unlikely(cqe_err_bits &&
 646                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 647                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 648                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 649                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 650                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 651                           scsi_bufflen(sc_cmd));
 652                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 653                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 654                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 655         }
 656
 657         spin_lock(&qedi_conn->list_lock);
 658         if (likely(cmd->io_cmd_in_list)) {
 659                 cmd->io_cmd_in_list = false;
 660                 list_del_init(&cmd->io_cmd);
 661                 qedi_conn->active_cmd_count--;
 662         }
 663         spin_unlock(&qedi_conn->list_lock);
 664
 665         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 666                   "Freeing tid=0x%x for cid=0x%x\n",
 667                   cmd->task_id, qedi_conn->iscsi_conn_id);
 668         cmd->state = RESPONSE_RECEIVED;
 669         if (qedi_io_tracing)
 670                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 671
 672         qedi_clear_task_idx(qedi, cmd->task_id);
 673         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 674                              conn->data, datalen);
 675 error:
 676         spin_unlock_bh(&session->back_lock);
 677 }
 678
 679 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 680                                   union iscsi_cqe *cqe,
 681                                   struct iscsi_task *task,
 682                                   struct qedi_conn *conn, uint16_t que_idx)
 683 {
 684         struct iscsi_conn *iscsi_conn;
 685         u32 hdr_opcode;
 686
 687         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 688         iscsi_conn = conn->cls_conn->dd_data;
 689
 690         switch (hdr_opcode) {
 691         case ISCSI_OPCODE_SCSI_RESPONSE:
 692         case ISCSI_OPCODE_DATA_IN:
 693                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 694                 break;
 695         case ISCSI_OPCODE_LOGIN_RESPONSE:
 696                 qedi_process_login_resp(qedi, cqe, task, conn);
 697                 break;
 698         case ISCSI_OPCODE_TMF_RESPONSE:
 699                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 700                 break;
 701         case ISCSI_OPCODE_TEXT_RESPONSE:
 702                 qedi_process_text_resp(qedi, cqe, task, conn);
 703                 break;
 704         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 705                 qedi_process_logout_resp(qedi, cqe, task, conn);
 706                 break;
 707         case ISCSI_OPCODE_NOP_IN:
 708                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 709                 break;
 710         default:
 711                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 712         }
 713 }
 714
 715 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 716                                           struct iscsi_cqe_solicited *cqe,
 717                                           struct iscsi_task *task,
 718                                           struct qedi_conn *qedi_conn)
 719 {
 720         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 721         struct iscsi_session *session = conn->session;
 722         struct qedi_cmd *cmd = task->dd_data;
 723
 724         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 725                   "itid=0x%x, cmd task id=0x%x\n",
 726                   cqe->itid, cmd->task_id);
 727
 728         cmd->state = RESPONSE_RECEIVED;
 729         qedi_clear_task_idx(qedi, cmd->task_id);
 730
 731         spin_lock_bh(&session->back_lock);
 732         __iscsi_put_task(task);
 733         spin_unlock_bh(&session->back_lock);
 734 }
 735
 736 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 737                                           struct iscsi_cqe_solicited *cqe,
 738                                           struct iscsi_task *task,
 739                                           struct iscsi_conn *conn)
 740 {
 741         struct qedi_work_map *work, *work_tmp;
 742         u32 proto_itt = cqe->itid;
 743         u32 ptmp_itt = 0;
 744         itt_t protoitt = 0;
 745         int found = 0;
 746         struct qedi_cmd *qedi_cmd = NULL;
 747         u32 rtid = 0;
 748         u32 iscsi_cid;
 749         struct qedi_conn *qedi_conn;
 750         struct qedi_cmd *dbg_cmd;
 751         struct iscsi_task *mtask;
 752         struct iscsi_tm *tmf_hdr = NULL;
 753
 754         iscsi_cid = cqe->conn_id;
 755         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 756         if (!qedi_conn) {
 757                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 758                           "icid not found 0x%x\n", cqe->conn_id);
 759                 return;
 760         }
 761
 762         /* Based on this itt get the corresponding qedi_cmd */
 763         spin_lock_bh(&qedi_conn->tmf_work_lock);
 764         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 765                                  list) {
 766                 if (work->rtid == proto_itt) {
 767                         /* We found the command */
 768                         qedi_cmd = work->qedi_cmd;
 769                         if (!qedi_cmd->list_tmf_work) {
 770                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 771                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 772                                           proto_itt, qedi_conn->iscsi_conn_id);
 773                                 WARN_ON(1);
 774                         }
 775                         found = 1;
 776                         mtask = qedi_cmd->task;
 777                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 778                         rtid = work->rtid;
 779
 780                         list_del_init(&work->list);
 781                         kfree(work);
 782                         qedi_cmd->list_tmf_work = NULL;
 783                 }
 784         }
 785         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 786
 787         if (found) {
 788                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 789                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 790                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 791
 792                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 793                     ISCSI_TM_FUNC_ABORT_TASK) {
 794                         spin_lock_bh(&conn->session->back_lock);
 795
 796                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 797                                              conn->session->age);
 798                         task = iscsi_itt_to_task(conn, protoitt);
 799
 800                         spin_unlock_bh(&conn->session->back_lock);
 801
 802                         if (!task) {
 803                                 QEDI_NOTICE(&qedi->dbg_ctx,
 804                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 805                                             get_itt(tmf_hdr->rtt),
 806                                             qedi_conn->iscsi_conn_id);
 807                                 return;
 808                         }
 809
 810                         dbg_cmd = task->dd_data;
 811
 812                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 813                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 814                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 815                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 816
 817                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 818                                 qedi_cmd->state = CLEANUP_RECV;
 819
 820                         qedi_clear_task_idx(qedi_conn->qedi, rtid);
 821
 822                         spin_lock(&qedi_conn->list_lock);
 823                         list_del_init(&dbg_cmd->io_cmd);
 824                         qedi_conn->active_cmd_count--;
 825                         spin_unlock(&qedi_conn->list_lock);
 826                         qedi_cmd->state = CLEANUP_RECV;
 827                         wake_up_interruptible(&qedi_conn->wait_queue);
 828                 }
 829         } else if (qedi_conn->cmd_cleanup_req > 0) {
 830                 spin_lock_bh(&conn->session->back_lock);
 831                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 832                 protoitt = build_itt(ptmp_itt, conn->session->age);
 833                 task = iscsi_itt_to_task(conn, protoitt);
 834                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 835                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 836                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 837                           qedi_conn->iscsi_conn_id);
 838
 839                 spin_unlock_bh(&conn->session->back_lock);
 840                 if (!task) {
 841                         QEDI_NOTICE(&qedi->dbg_ctx,
 842                                     "task is null, itid=0x%x, cid=0x%x\n",
 843                                     cqe->itid, qedi_conn->iscsi_conn_id);
 844                         return;
 845                 }
 846                 qedi_conn->cmd_cleanup_cmpl++;
 847                 wake_up(&qedi_conn->wait_queue);
 848
 849                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 850                           "Freeing tid=0x%x for cid=0x%x\n",
 851                           cqe->itid, qedi_conn->iscsi_conn_id);
 852                 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
 853
 854         } else {
 855                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 856                 protoitt = build_itt(ptmp_itt, conn->session->age);
 857                 task = iscsi_itt_to_task(conn, protoitt);
 858                 QEDI_ERR(&qedi->dbg_ctx,
 859                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 860                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 861         }
 862 }
 863
 864 void qedi_fp_process_cqes(struct qedi_work *work)
 865 {
 866         struct qedi_ctx *qedi = work->qedi;
 867         union iscsi_cqe *cqe = &work->cqe;
 868         struct iscsi_task *task = NULL;
 869         struct iscsi_nopout *nopout_hdr;
 870         struct qedi_conn *q_conn;
 871         struct iscsi_conn *conn;
 872         struct qedi_cmd *qedi_cmd;
 873         u32 comp_type;
 874         u32 iscsi_cid;
 875         u32 hdr_opcode;
 876         u16 que_idx = work->que_idx;
 877         u8 cqe_err_bits = 0;
 878
 879         comp_type = cqe->cqe_common.cqe_type;
 880         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 881         cqe_err_bits =
 882                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 883
 884         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 885                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 886                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 887
 888         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 889                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 890                 return;
 891         }
 892
 893         iscsi_cid  = cqe->cqe_common.conn_id;
 894         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 895         if (!q_conn) {
 896                 QEDI_WARN(&qedi->dbg_ctx,
 897                           "Session no longer exists for cid=0x%x!!\n",
 898                           iscsi_cid);
 899                 return;
 900         }
 901
 902         conn = q_conn->cls_conn->dd_data;
 903
 904         if (unlikely(cqe_err_bits &&
 905                      GET_FIELD(cqe_err_bits,
 906                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 907                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 908                 return;
 909         }
 910
 911         switch (comp_type) {
 912         case ISCSI_CQE_TYPE_SOLICITED:
 913         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 914                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 915                 task = qedi_cmd->task;
 916                 if (!task) {
 917                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 918                         return;
 919                 }
 920
 921                 /* Process NOPIN local completion */
 922                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 923                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 924                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 925                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 926                                                       task, q_conn);
 927                 } else {
 928                         cqe->cqe_solicited.itid =
 929                                                qedi_get_itt(cqe->cqe_solicited);
 930                         /* Process other solicited responses */
 931                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 932                 }
 933                 break;
 934         case ISCSI_CQE_TYPE_UNSOLICITED:
 935                 switch (hdr_opcode) {
 936                 case ISCSI_OPCODE_NOP_IN:
 937                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 938                                                 que_idx);
 939                         break;
 940                 case ISCSI_OPCODE_ASYNC_MSG:
 941                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 942                                                 que_idx);
 943                         break;
 944                 case ISCSI_OPCODE_REJECT:
 945                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 946                                                  que_idx);
 947                         break;
 948                 }
 949                 goto exit_fp_process;
 950         case ISCSI_CQE_TYPE_DUMMY:
 951                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 952                 goto exit_fp_process;
 953         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 954                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 955                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 956                                               conn);
 957                 goto exit_fp_process;
 958         default:
 959                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 960                 break;
 961         }
 962
 963 exit_fp_process:
 964         return;
 965 }
 966
 967 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 968 {
 969         struct iscsi_db_data dbell = { 0 };
 970
 971         dbell.agg_flags = 0;
 972
 973         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 974         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 975         dbell.params |=
 976                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 977
 978         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 979         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
 980
 981         /* Make sure fw write idx is coherent, and include both memory barriers
 982          * as a failsafe as for some architectures the call is the same but on
 983          * others they are two different assembly operations.
 984          */
 985         wmb();
 986         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
 987                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
 988                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
 989                   qedi_conn->iscsi_conn_id);
 990 }
 991
 992 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
 993 {
 994         struct qedi_endpoint *ep;
 995         u16 rval;
 996
 997         ep = qedi_conn->ep;
 998         rval = ep->sq_prod_idx;
 999
1000         /* Increament SQ index */
1001         ep->sq_prod_idx++;
1002         ep->fw_sq_prod_idx++;
1003         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1004                 ep->sq_prod_idx = 0;
1005
1006         return rval;
1007 }
1008
1009 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1010                           struct iscsi_task *task)
1011 {
1012         struct iscsi_login_req_hdr login_req_pdu_header;
1013         struct scsi_sgl_task_params tx_sgl_task_params;
1014         struct scsi_sgl_task_params rx_sgl_task_params;
1015         struct iscsi_task_params task_params;
1016         struct e4_iscsi_task_context *fw_task_ctx;
1017         struct qedi_ctx *qedi = qedi_conn->qedi;
1018         struct iscsi_login_req *login_hdr;
1019         struct scsi_sge *resp_sge = NULL;
1020         struct qedi_cmd *qedi_cmd;
1021         struct qedi_endpoint *ep;
1022         s16 tid = 0;
1023         u16 sq_idx = 0;
1024         int rval = 0;
1025
1026         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1027         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1028         ep = qedi_conn->ep;
1029         login_hdr = (struct iscsi_login_req *)task->hdr;
1030
1031         tid = qedi_get_task_idx(qedi);
1032         if (tid == -1)
1033                 return -ENOMEM;
1034
1035         fw_task_ctx =
1036              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1037                                                                tid);
1038         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1039
1040         qedi_cmd->task_id = tid;
1041
1042         memset(&task_params, 0, sizeof(task_params));
1043         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1044         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1045         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1046         /* Update header info */
1047         login_req_pdu_header.opcode = login_hdr->opcode;
1048         login_req_pdu_header.version_min = login_hdr->min_version;
1049         login_req_pdu_header.version_max = login_hdr->max_version;
1050         login_req_pdu_header.flags_attr = login_hdr->flags;
1051         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1052         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1053
1054         login_req_pdu_header.tsih = login_hdr->tsih;
1055         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1056
1057         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1058         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1059         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1060         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1061         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1062         login_req_pdu_header.exp_stat_sn = 0;
1063
1064         /* Fill tx AHS and rx buffer */
1065         tx_sgl_task_params.sgl =
1066                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1067         tx_sgl_task_params.sgl_phys_addr.lo =
1068                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1069         tx_sgl_task_params.sgl_phys_addr.hi =
1070                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1071         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1072         tx_sgl_task_params.num_sges = 1;
1073
1074         rx_sgl_task_params.sgl =
1075                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1076         rx_sgl_task_params.sgl_phys_addr.lo =
1077                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1078         rx_sgl_task_params.sgl_phys_addr.hi =
1079                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1080         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1081         rx_sgl_task_params.num_sges = 1;
1082
1083         /* Fill fw input params */
1084         task_params.context = fw_task_ctx;
1085         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1086         task_params.itid = tid;
1087         task_params.cq_rss_number = 0;
1088         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1089         task_params.rx_io_size = resp_sge->sge_len;
1090
1091         sq_idx = qedi_get_wqe_idx(qedi_conn);
1092         task_params.sqe = &ep->sq[sq_idx];
1093
1094         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1095         rval = init_initiator_login_request_task(&task_params,
1096                                                  &login_req_pdu_header,
1097                                                  &tx_sgl_task_params,
1098                                                  &rx_sgl_task_params);
1099         if (rval)
1100                 return -1;
1101
1102         spin_lock(&qedi_conn->list_lock);
1103         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1104         qedi_cmd->io_cmd_in_list = true;
1105         qedi_conn->active_cmd_count++;
1106         spin_unlock(&qedi_conn->list_lock);
1107
1108         qedi_ring_doorbell(qedi_conn);
1109         return 0;
1110 }
1111
1112 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1113                            struct iscsi_task *task)
1114 {
1115         struct iscsi_logout_req_hdr logout_pdu_header;
1116         struct scsi_sgl_task_params tx_sgl_task_params;
1117         struct scsi_sgl_task_params rx_sgl_task_params;
1118         struct iscsi_task_params task_params;
1119         struct e4_iscsi_task_context *fw_task_ctx;
1120         struct iscsi_logout *logout_hdr = NULL;
1121         struct qedi_ctx *qedi = qedi_conn->qedi;
1122         struct qedi_cmd *qedi_cmd;
1123         struct qedi_endpoint *ep;
1124         s16 tid = 0;
1125         u16 sq_idx = 0;
1126         int rval = 0;
1127
1128         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1129         logout_hdr = (struct iscsi_logout *)task->hdr;
1130         ep = qedi_conn->ep;
1131
1132         tid = qedi_get_task_idx(qedi);
1133         if (tid == -1)
1134                 return -ENOMEM;
1135
1136         fw_task_ctx =
1137              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1138                                                                tid);
1139         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1140
1141         qedi_cmd->task_id = tid;
1142
1143         memset(&task_params, 0, sizeof(task_params));
1144         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1145         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1146         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1147
1148         /* Update header info */
1149         logout_pdu_header.opcode = logout_hdr->opcode;
1150         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1151         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1152         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1153         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1154         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1155         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1156
1157         /* Fill fw input params */
1158         task_params.context = fw_task_ctx;
1159         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1160         task_params.itid = tid;
1161         task_params.cq_rss_number = 0;
1162         task_params.tx_io_size = 0;
1163         task_params.rx_io_size = 0;
1164
1165         sq_idx = qedi_get_wqe_idx(qedi_conn);
1166         task_params.sqe = &ep->sq[sq_idx];
1167         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1168
1169         rval = init_initiator_logout_request_task(&task_params,
1170                                                   &logout_pdu_header,
1171                                                   NULL, NULL);
1172         if (rval)
1173                 return -1;
1174
1175         spin_lock(&qedi_conn->list_lock);
1176         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1177         qedi_cmd->io_cmd_in_list = true;
1178         qedi_conn->active_cmd_count++;
1179         spin_unlock(&qedi_conn->list_lock);
1180
1181         qedi_ring_doorbell(qedi_conn);
1182         return 0;
1183 }
1184
1185 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1186                         struct iscsi_task *task, bool in_recovery)
1187 {
1188         int rval;
1189         struct iscsi_task *ctask;
1190         struct qedi_cmd *cmd, *cmd_tmp;
1191         struct iscsi_tm *tmf_hdr;
1192         unsigned int lun = 0;
1193         bool lun_reset = false;
1194         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1195         struct iscsi_session *session = conn->session;
1196
1197         /* From recovery, task is NULL or from tmf resp valid task */
1198         if (task) {
1199                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1200
1201                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1202                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1203                         lun_reset = true;
1204                         lun = scsilun_to_int(&tmf_hdr->lun);
1205                 }
1206         }
1207
1208         qedi_conn->cmd_cleanup_req = 0;
1209         qedi_conn->cmd_cleanup_cmpl = 0;
1210
1211         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1212                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1213                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1214                   in_recovery, lun_reset);
1215
1216         if (lun_reset)
1217                 spin_lock_bh(&session->back_lock);
1218
1219         spin_lock(&qedi_conn->list_lock);
1220
1221         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1222                                  io_cmd) {
1223                 ctask = cmd->task;
1224                 if (ctask == task)
1225                         continue;
1226
1227                 if (lun_reset) {
1228                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1229                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1230                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1231                                           cmd->task_id, get_itt(ctask->itt),
1232                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1233                                           ctask->state, cmd->state,
1234                                           qedi_conn->iscsi_conn_id);
1235                                 if (cmd->scsi_cmd->device->lun != lun)
1236                                         continue;
1237                         }
1238                 }
1239                 qedi_conn->cmd_cleanup_req++;
1240                 qedi_iscsi_cleanup_task(ctask, true);
1241
1242                 list_del_init(&cmd->io_cmd);
1243                 qedi_conn->active_cmd_count--;
1244                 QEDI_WARN(&qedi->dbg_ctx,
1245                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1246                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1247         }
1248
1249         spin_unlock(&qedi_conn->list_lock);
1250
1251         if (lun_reset)
1252                 spin_unlock_bh(&session->back_lock);
1253
1254         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1255                   "cmd_cleanup_req=%d, cid=0x%x\n",
1256                   qedi_conn->cmd_cleanup_req,
1257                   qedi_conn->iscsi_conn_id);
1258
1259         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1260                                                  ((qedi_conn->cmd_cleanup_req ==
1261                                                  qedi_conn->cmd_cleanup_cmpl) ||
1262                                                  qedi_conn->ep),
1263                                                  5 * HZ);
1264         if (rval) {
1265                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1266                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1267                           qedi_conn->cmd_cleanup_req,
1268                           qedi_conn->cmd_cleanup_cmpl,
1269                           qedi_conn->iscsi_conn_id);
1270
1271                 return 0;
1272         }
1273
1274         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1275                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1276                   qedi_conn->cmd_cleanup_req,
1277                   qedi_conn->cmd_cleanup_cmpl,
1278                   qedi_conn->iscsi_conn_id);
1279
1280         iscsi_host_for_each_session(qedi->shost,
1281                                     qedi_mark_device_missing);
1282         qedi_ops->common->drain(qedi->cdev);
1283
1284         /* Enable IOs for all other sessions except current.*/
1285         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1286                                               (qedi_conn->cmd_cleanup_req ==
1287                                                qedi_conn->cmd_cleanup_cmpl),
1288                                               5 * HZ)) {
1289                 iscsi_host_for_each_session(qedi->shost,
1290                                             qedi_mark_device_available);
1291                 return -1;
1292         }
1293
1294         iscsi_host_for_each_session(qedi->shost,
1295                                     qedi_mark_device_available);
1296
1297         return 0;
1298 }
1299
1300 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1301                   struct iscsi_task *task)
1302 {
1303         struct qedi_endpoint *qedi_ep;
1304         int rval;
1305
1306         qedi_ep = qedi_conn->ep;
1307         qedi_conn->cmd_cleanup_req = 0;
1308         qedi_conn->cmd_cleanup_cmpl = 0;
1309
1310         if (!qedi_ep) {
1311                 QEDI_WARN(&qedi->dbg_ctx,
1312                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1313                           qedi_conn->iscsi_conn_id);
1314                 return;
1315         }
1316
1317         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1318                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1319                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1320
1321         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1322
1323         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1324         if (rval) {
1325                 QEDI_ERR(&qedi->dbg_ctx,
1326                          "fatal error, need hard reset, cid=0x%x\n",
1327                          qedi_conn->iscsi_conn_id);
1328                 WARN_ON(1);
1329         }
1330 }
1331
1332 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1333                                          struct qedi_conn *qedi_conn,
1334                                          struct iscsi_task *task,
1335                                          struct qedi_cmd *qedi_cmd,
1336                                          struct qedi_work_map *list_work)
1337 {
1338         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1339         int wait;
1340
1341         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1342                                                  ((qedi_cmd->state ==
1343                                                    CLEANUP_RECV) ||
1344                                                  ((qedi_cmd->type == TYPEIO) &&
1345                                                   (cmd->state ==
1346                                                    RESPONSE_RECEIVED))),
1347                                                  5 * HZ);
1348         if (!wait) {
1349                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1350
1351                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1352                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1353                           cmd->task_id, qedi_conn->iscsi_conn_id);
1354
1355                 return -1;
1356         }
1357         return 0;
1358 }
1359
1360 static void qedi_tmf_work(struct work_struct *work)
1361 {
1362         struct qedi_cmd *qedi_cmd =
1363                 container_of(work, struct qedi_cmd, tmf_work);
1364         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1365         struct qedi_ctx *qedi = qedi_conn->qedi;
1366         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1367         struct qedi_work_map *list_work = NULL;
1368         struct iscsi_task *mtask;
1369         struct qedi_cmd *cmd;
1370         struct iscsi_task *ctask;
1371         struct iscsi_tm *tmf_hdr;
1372         s16 rval = 0;
1373         s16 tid = 0;
1374
1375         mtask = qedi_cmd->task;
1376         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1377         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1378
1379         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1380         if (!ctask || !ctask->sc) {
1381                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1382                 goto abort_ret;
1383         }
1384
1385         cmd = (struct qedi_cmd *)ctask->dd_data;
1386         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1387                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1388                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1389                   qedi_conn->iscsi_conn_id);
1390
1391         if (qedi_do_not_recover) {
1392                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1393                          qedi_do_not_recover);
1394                 goto abort_ret;
1395         }
1396
1397         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1398         if (!list_work) {
1399                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1400                 goto abort_ret;
1401         }
1402
1403         qedi_cmd->type = TYPEIO;
1404         list_work->qedi_cmd = qedi_cmd;
1405         list_work->rtid = cmd->task_id;
1406         list_work->state = QEDI_WORK_SCHEDULED;
1407         qedi_cmd->list_tmf_work = list_work;
1408
1409         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1410                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1411                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1412                   tmf_hdr->flags);
1413
1414         spin_lock_bh(&qedi_conn->tmf_work_lock);
1415         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1416         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1417
1418         qedi_iscsi_cleanup_task(ctask, false);
1419
1420         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1421                                              list_work);
1422         if (rval == -1) {
1423                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1424                           "FW cleanup got escalated, cid=0x%x\n",
1425                           qedi_conn->iscsi_conn_id);
1426                 goto ldel_exit;
1427         }
1428
1429         tid = qedi_get_task_idx(qedi);
1430         if (tid == -1) {
1431                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1432                          qedi_conn->iscsi_conn_id);
1433                 goto ldel_exit;
1434         }
1435
1436         qedi_cmd->task_id = tid;
1437         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1438
1439 abort_ret:
1440         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1441         return;
1442
1443 ldel_exit:
1444         spin_lock_bh(&qedi_conn->tmf_work_lock);
1445         if (!qedi_cmd->list_tmf_work) {
1446                 list_del_init(&list_work->list);
1447                 qedi_cmd->list_tmf_work = NULL;
1448                 kfree(list_work);
1449         }
1450         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1451
1452         spin_lock(&qedi_conn->list_lock);
1453         list_del_init(&cmd->io_cmd);
1454         qedi_conn->active_cmd_count--;
1455         spin_unlock(&qedi_conn->list_lock);
1456
1457         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1458 }
1459
1460 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1461                                struct iscsi_task *mtask)
1462 {
1463         struct iscsi_tmf_request_hdr tmf_pdu_header;
1464         struct iscsi_task_params task_params;
1465         struct qedi_ctx *qedi = qedi_conn->qedi;
1466         struct e4_iscsi_task_context *fw_task_ctx;
1467         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1468         struct iscsi_task *ctask;
1469         struct iscsi_tm *tmf_hdr;
1470         struct qedi_cmd *qedi_cmd;
1471         struct qedi_cmd *cmd;
1472         struct qedi_endpoint *ep;
1473         u32 scsi_lun[2];
1474         s16 tid = 0;
1475         u16 sq_idx = 0;
1476         int rval = 0;
1477
1478         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1479         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1480         ep = qedi_conn->ep;
1481         if (!ep)
1482                 return -ENODEV;
1483
1484         tid = qedi_get_task_idx(qedi);
1485         if (tid == -1)
1486                 return -ENOMEM;
1487
1488         fw_task_ctx =
1489              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1490                                                                tid);
1491         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1492
1493         qedi_cmd->task_id = tid;
1494
1495         memset(&task_params, 0, sizeof(task_params));
1496         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1497
1498         /* Update header info */
1499         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1500         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1501         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1502
1503         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1504         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1505         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1506
1507         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1508              ISCSI_TM_FUNC_ABORT_TASK) {
1509                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1510                 if (!ctask || !ctask->sc) {
1511                         QEDI_ERR(&qedi->dbg_ctx,
1512                                  "Could not get reference task\n");
1513                         return 0;
1514                 }
1515                 cmd = (struct qedi_cmd *)ctask->dd_data;
1516                 tmf_pdu_header.rtt =
1517                                 qedi_set_itt(cmd->task_id,
1518                                              get_itt(tmf_hdr->rtt));
1519         } else {
1520                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1521         }
1522
1523         tmf_pdu_header.opcode = tmf_hdr->opcode;
1524         tmf_pdu_header.function = tmf_hdr->flags;
1525         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1526         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1527
1528         /* Fill fw input params */
1529         task_params.context = fw_task_ctx;
1530         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1531         task_params.itid = tid;
1532         task_params.cq_rss_number = 0;
1533         task_params.tx_io_size = 0;
1534         task_params.rx_io_size = 0;
1535
1536         sq_idx = qedi_get_wqe_idx(qedi_conn);
1537         task_params.sqe = &ep->sq[sq_idx];
1538
1539         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1540         rval = init_initiator_tmf_request_task(&task_params,
1541                                                &tmf_pdu_header);
1542         if (rval)
1543                 return -1;
1544
1545         spin_lock(&qedi_conn->list_lock);
1546         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1547         qedi_cmd->io_cmd_in_list = true;
1548         qedi_conn->active_cmd_count++;
1549         spin_unlock(&qedi_conn->list_lock);
1550
1551         qedi_ring_doorbell(qedi_conn);
1552         return 0;
1553 }
1554
1555 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1556                           struct iscsi_task *mtask)
1557 {
1558         struct qedi_ctx *qedi = qedi_conn->qedi;
1559         struct iscsi_tm *tmf_hdr;
1560         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1561         s16 tid = 0;
1562
1563         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1564         qedi_cmd->task = mtask;
1565
1566         /* If abort task then schedule the work and return */
1567         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1568             ISCSI_TM_FUNC_ABORT_TASK) {
1569                 qedi_cmd->state = CLEANUP_WAIT;
1570                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1571                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1572
1573         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1574                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1575                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1576                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1577                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1578                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1579                 tid = qedi_get_task_idx(qedi);
1580                 if (tid == -1) {
1581                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1582                                  qedi_conn->iscsi_conn_id);
1583                         return -1;
1584                 }
1585                 qedi_cmd->task_id = tid;
1586
1587                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1588
1589         } else {
1590                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1591                          qedi_conn->iscsi_conn_id);
1592                 return -1;
1593         }
1594
1595         return 0;
1596 }
1597
1598 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1599                          struct iscsi_task *task)
1600 {
1601         struct iscsi_text_request_hdr text_request_pdu_header;
1602         struct scsi_sgl_task_params tx_sgl_task_params;
1603         struct scsi_sgl_task_params rx_sgl_task_params;
1604         struct iscsi_task_params task_params;
1605         struct e4_iscsi_task_context *fw_task_ctx;
1606         struct qedi_ctx *qedi = qedi_conn->qedi;
1607         struct iscsi_text *text_hdr;
1608         struct scsi_sge *req_sge = NULL;
1609         struct scsi_sge *resp_sge = NULL;
1610         struct qedi_cmd *qedi_cmd;
1611         struct qedi_endpoint *ep;
1612         s16 tid = 0;
1613         u16 sq_idx = 0;
1614         int rval = 0;
1615
1616         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1617         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1618         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1619         text_hdr = (struct iscsi_text *)task->hdr;
1620         ep = qedi_conn->ep;
1621
1622         tid = qedi_get_task_idx(qedi);
1623         if (tid == -1)
1624                 return -ENOMEM;
1625
1626         fw_task_ctx =
1627              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1628                                                                tid);
1629         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1630
1631         qedi_cmd->task_id = tid;
1632
1633         memset(&task_params, 0, sizeof(task_params));
1634         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1635         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1636         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1637
1638         /* Update header info */
1639         text_request_pdu_header.opcode = text_hdr->opcode;
1640         text_request_pdu_header.flags_attr = text_hdr->flags;
1641
1642         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1643         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1644         text_request_pdu_header.ttt = text_hdr->ttt;
1645         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1646         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1647         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1648
1649         /* Fill tx AHS and rx buffer */
1650         tx_sgl_task_params.sgl =
1651                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1652         tx_sgl_task_params.sgl_phys_addr.lo =
1653                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1654         tx_sgl_task_params.sgl_phys_addr.hi =
1655                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1656         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1657         tx_sgl_task_params.num_sges = 1;
1658
1659         rx_sgl_task_params.sgl =
1660                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1661         rx_sgl_task_params.sgl_phys_addr.lo =
1662                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1663         rx_sgl_task_params.sgl_phys_addr.hi =
1664                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1665         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1666         rx_sgl_task_params.num_sges = 1;
1667
1668         /* Fill fw input params */
1669         task_params.context = fw_task_ctx;
1670         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1671         task_params.itid = tid;
1672         task_params.cq_rss_number = 0;
1673         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1674         task_params.rx_io_size = resp_sge->sge_len;
1675
1676         sq_idx = qedi_get_wqe_idx(qedi_conn);
1677         task_params.sqe = &ep->sq[sq_idx];
1678
1679         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1680         rval = init_initiator_text_request_task(&task_params,
1681                                                 &text_request_pdu_header,
1682                                                 &tx_sgl_task_params,
1683                                                 &rx_sgl_task_params);
1684         if (rval)
1685                 return -1;
1686
1687         spin_lock(&qedi_conn->list_lock);
1688         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1689         qedi_cmd->io_cmd_in_list = true;
1690         qedi_conn->active_cmd_count++;
1691         spin_unlock(&qedi_conn->list_lock);
1692
1693         qedi_ring_doorbell(qedi_conn);
1694         return 0;
1695 }
1696
1697 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1698                            struct iscsi_task *task,
1699                            char *datap, int data_len, int unsol)
1700 {
1701         struct iscsi_nop_out_hdr nop_out_pdu_header;
1702         struct scsi_sgl_task_params tx_sgl_task_params;
1703         struct scsi_sgl_task_params rx_sgl_task_params;
1704         struct iscsi_task_params task_params;
1705         struct qedi_ctx *qedi = qedi_conn->qedi;
1706         struct e4_iscsi_task_context *fw_task_ctx;
1707         struct iscsi_nopout *nopout_hdr;
1708         struct scsi_sge *resp_sge = NULL;
1709         struct qedi_cmd *qedi_cmd;
1710         struct qedi_endpoint *ep;
1711         u32 scsi_lun[2];
1712         s16 tid = 0;
1713         u16 sq_idx = 0;
1714         int rval = 0;
1715
1716         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1717         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1718         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1719         ep = qedi_conn->ep;
1720
1721         tid = qedi_get_task_idx(qedi);
1722         if (tid == -1)
1723                 return -ENOMEM;
1724
1725         fw_task_ctx =
1726              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1727                                                                tid);
1728         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1729
1730         qedi_cmd->task_id = tid;
1731
1732         memset(&task_params, 0, sizeof(task_params));
1733         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1734         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1735         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1736
1737         /* Update header info */
1738         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1739         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1740         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1741
1742         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1743         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1744         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1745         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1746         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1747
1748         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1749
1750         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1751                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1752                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1753         } else {
1754                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1755                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1756
1757                 spin_lock(&qedi_conn->list_lock);
1758                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1759                 qedi_cmd->io_cmd_in_list = true;
1760                 qedi_conn->active_cmd_count++;
1761                 spin_unlock(&qedi_conn->list_lock);
1762         }
1763
1764         /* Fill tx AHS and rx buffer */
1765         if (data_len) {
1766                 tx_sgl_task_params.sgl =
1767                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1768                 tx_sgl_task_params.sgl_phys_addr.lo =
1769                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1770                 tx_sgl_task_params.sgl_phys_addr.hi =
1771                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1772                 tx_sgl_task_params.total_buffer_size = data_len;
1773                 tx_sgl_task_params.num_sges = 1;
1774
1775                 rx_sgl_task_params.sgl =
1776                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1777                 rx_sgl_task_params.sgl_phys_addr.lo =
1778                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1779                 rx_sgl_task_params.sgl_phys_addr.hi =
1780                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1781                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1782                 rx_sgl_task_params.num_sges = 1;
1783         }
1784
1785         /* Fill fw input params */
1786         task_params.context = fw_task_ctx;
1787         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1788         task_params.itid = tid;
1789         task_params.cq_rss_number = 0;
1790         task_params.tx_io_size = data_len;
1791         task_params.rx_io_size = resp_sge->sge_len;
1792
1793         sq_idx = qedi_get_wqe_idx(qedi_conn);
1794         task_params.sqe = &ep->sq[sq_idx];
1795
1796         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1797         rval = init_initiator_nop_out_task(&task_params,
1798                                            &nop_out_pdu_header,
1799                                            &tx_sgl_task_params,
1800                                            &rx_sgl_task_params);
1801         if (rval)
1802                 return -1;
1803
1804         qedi_ring_doorbell(qedi_conn);
1805         return 0;
1806 }
1807
1808 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1809                          int bd_index)
1810 {
1811         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1812         int frag_size, sg_frags;
1813
1814         sg_frags = 0;
1815
1816         while (sg_len) {
1817                 if (addr % QEDI_PAGE_SIZE)
1818                         frag_size =
1819                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1820                 else
1821                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1822                                     (sg_len % QEDI_BD_SPLIT_SZ);
1823
1824                 if (frag_size == 0)
1825                         frag_size = QEDI_BD_SPLIT_SZ;
1826
1827                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1828                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1829                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1830                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1831                           "split sge %d: addr=%llx, len=%x",
1832                           (bd_index + sg_frags), addr, frag_size);
1833
1834                 addr += (u64)frag_size;
1835                 sg_frags++;
1836                 sg_len -= frag_size;
1837         }
1838         return sg_frags;
1839 }
1840
1841 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1842 {
1843         struct scsi_cmnd *sc = cmd->scsi_cmd;
1844         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1845         struct scatterlist *sg;
1846         int byte_count = 0;
1847         int bd_count = 0;
1848         int sg_count;
1849         int sg_len;
1850         int sg_frags;
1851         u64 addr, end_addr;
1852         int i;
1853
1854         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1855
1856         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1857                               scsi_sg_count(sc), sc->sc_data_direction);
1858
1859         /*
1860          * New condition to send single SGE as cached-SGL.
1861          * Single SGE with length less than 64K.
1862          */
1863         sg = scsi_sglist(sc);
1864         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1865                 sg_len = sg_dma_len(sg);
1866                 addr = (u64)sg_dma_address(sg);
1867
1868                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1869                 bd[bd_count].sge_addr.hi = (addr >> 32);
1870                 bd[bd_count].sge_len = (u16)sg_len;
1871
1872                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1873                           "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1874                           sg_count, addr, sg_len);
1875
1876                 return ++bd_count;
1877         }
1878
1879         scsi_for_each_sg(sc, sg, sg_count, i) {
1880                 sg_len = sg_dma_len(sg);
1881                 addr = (u64)sg_dma_address(sg);
1882                 end_addr = (addr + sg_len);
1883
1884                 /*
1885                  * first sg elem in the 'list',
1886                  * check if end addr is page-aligned.
1887                  */
1888                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1889                         cmd->use_slowpath = true;
1890
1891                 /*
1892                  * last sg elem in the 'list',
1893                  * check if start addr is page-aligned.
1894                  */
1895                 else if ((i == (sg_count - 1)) &&
1896                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1897                         cmd->use_slowpath = true;
1898
1899                 /*
1900                  * middle sg elements in list,
1901                  * check if start and end addr is page-aligned
1902                  */
1903                 else if ((i != 0) && (i != (sg_count - 1)) &&
1904                          ((addr % QEDI_PAGE_SIZE) ||
1905                          (end_addr % QEDI_PAGE_SIZE)))
1906                         cmd->use_slowpath = true;
1907
1908                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1909                           i, sg_len);
1910
1911                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1912                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1913                 } else {
1914                         sg_frags = 1;
1915                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1916                         bd[bd_count].sge_addr.hi = addr >> 32;
1917                         bd[bd_count].sge_len = sg_len;
1918                 }
1919                 byte_count += sg_len;
1920                 bd_count += sg_frags;
1921         }
1922
1923         if (byte_count != scsi_bufflen(sc))
1924                 QEDI_ERR(&qedi->dbg_ctx,
1925                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1926                          scsi_bufflen(sc));
1927         else
1928                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1929                           byte_count);
1930
1931         WARN_ON(byte_count != scsi_bufflen(sc));
1932
1933         return bd_count;
1934 }
1935
1936 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1937 {
1938         int bd_count;
1939         struct scsi_cmnd *sc = cmd->scsi_cmd;
1940
1941         if (scsi_sg_count(sc)) {
1942                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1943                 if (bd_count == 0)
1944                         return;
1945         } else {
1946                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1947
1948                 bd[0].sge_addr.lo = 0;
1949                 bd[0].sge_addr.hi = 0;
1950                 bd[0].sge_len = 0;
1951                 bd_count = 0;
1952         }
1953         cmd->io_tbl.sge_valid = bd_count;
1954 }
1955
1956 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1957 {
1958         u32 dword;
1959         int lpcnt;
1960         u8 *srcp;
1961
1962         lpcnt = sc->cmd_len / sizeof(dword);
1963         srcp = (u8 *)sc->cmnd;
1964         while (lpcnt--) {
1965                 memcpy(&dword, (const void *)srcp, 4);
1966                 *dstp = cpu_to_be32(dword);
1967                 srcp += 4;
1968                 dstp++;
1969         }
1970         if (sc->cmd_len & 0x3) {
1971                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1972                 *dstp = cpu_to_be32(dword);
1973         }
1974 }
1975
1976 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1977                    u16 tid, int8_t direction)
1978 {
1979         struct qedi_io_log *io_log;
1980         struct iscsi_conn *conn = task->conn;
1981         struct qedi_conn *qedi_conn = conn->dd_data;
1982         struct scsi_cmnd *sc_cmd = task->sc;
1983         unsigned long flags;
1984
1985         spin_lock_irqsave(&qedi->io_trace_lock, flags);
1986
1987         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1988         io_log->direction = direction;
1989         io_log->task_id = tid;
1990         io_log->cid = qedi_conn->iscsi_conn_id;
1991         io_log->lun = sc_cmd->device->lun;
1992         io_log->op = sc_cmd->cmnd[0];
1993         io_log->lba[0] = sc_cmd->cmnd[2];
1994         io_log->lba[1] = sc_cmd->cmnd[3];
1995         io_log->lba[2] = sc_cmd->cmnd[4];
1996         io_log->lba[3] = sc_cmd->cmnd[5];
1997         io_log->bufflen = scsi_bufflen(sc_cmd);
1998         io_log->sg_count = scsi_sg_count(sc_cmd);
1999         io_log->fast_sgs = qedi->fast_sgls;
2000         io_log->cached_sgs = qedi->cached_sgls;
2001         io_log->slow_sgs = qedi->slow_sgls;
2002         io_log->cached_sge = qedi->use_cached_sge;
2003         io_log->slow_sge = qedi->use_slow_sge;
2004         io_log->fast_sge = qedi->use_fast_sge;
2005         io_log->result = sc_cmd->result;
2006         io_log->jiffies = jiffies;
2007         io_log->blk_req_cpu = smp_processor_id();
2008
2009         if (direction == QEDI_IO_TRACE_REQ) {
2010                 /* For requests we only care about the submission CPU */
2011                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2012                 io_log->intr_cpu = 0;
2013                 io_log->blk_rsp_cpu = 0;
2014         } else if (direction == QEDI_IO_TRACE_RSP) {
2015                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2016                 io_log->intr_cpu = qedi->intr_cpu;
2017                 io_log->blk_rsp_cpu = smp_processor_id();
2018         }
2019
2020         qedi->io_trace_idx++;
2021         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2022                 qedi->io_trace_idx = 0;
2023
2024         qedi->use_cached_sge = false;
2025         qedi->use_slow_sge = false;
2026         qedi->use_fast_sge = false;
2027
2028         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2029 }
2030
2031 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2032 {
2033         struct iscsi_conn *conn = task->conn;
2034         struct iscsi_session *session = conn->session;
2035         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2036         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2037         struct qedi_conn *qedi_conn = conn->dd_data;
2038         struct qedi_cmd *cmd = task->dd_data;
2039         struct scsi_cmnd *sc = task->sc;
2040         struct iscsi_cmd_hdr cmd_pdu_header;
2041         struct scsi_sgl_task_params tx_sgl_task_params;
2042         struct scsi_sgl_task_params rx_sgl_task_params;
2043         struct scsi_sgl_task_params *prx_sgl = NULL;
2044         struct scsi_sgl_task_params *ptx_sgl = NULL;
2045         struct iscsi_task_params task_params;
2046         struct iscsi_conn_params conn_params;
2047         struct scsi_initiator_cmd_params cmd_params;
2048         struct e4_iscsi_task_context *fw_task_ctx;
2049         struct iscsi_cls_conn *cls_conn;
2050         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2051         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2052         struct qedi_endpoint *ep;
2053         u32 scsi_lun[2];
2054         s16 tid = 0;
2055         u16 sq_idx = 0;
2056         u16 cq_idx;
2057         int rval = 0;
2058
2059         ep = qedi_conn->ep;
2060         cls_conn = qedi_conn->cls_conn;
2061         conn = cls_conn->dd_data;
2062
2063         qedi_iscsi_map_sg_list(cmd);
2064         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2065
2066         tid = qedi_get_task_idx(qedi);
2067         if (tid == -1)
2068                 return -ENOMEM;
2069
2070         fw_task_ctx =
2071              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2072                                                                tid);
2073         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2074
2075         cmd->task_id = tid;
2076
2077         memset(&task_params, 0, sizeof(task_params));
2078         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2079         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2080         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2081         memset(&conn_params, 0, sizeof(conn_params));
2082         memset(&cmd_params, 0, sizeof(cmd_params));
2083
2084         cq_idx = smp_processor_id() % qedi->num_queues;
2085         /* Update header info */
2086         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2087                   ISCSI_ATTR_SIMPLE);
2088         if (hdr->cdb[0] != TEST_UNIT_READY) {
2089                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2090                         SET_FIELD(cmd_pdu_header.flags_attr,
2091                                   ISCSI_CMD_HDR_WRITE, 1);
2092                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2093                 } else {
2094                         SET_FIELD(cmd_pdu_header.flags_attr,
2095                                   ISCSI_CMD_HDR_READ, 1);
2096                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2097                 }
2098         }
2099
2100         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2101         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2102
2103         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2104         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2105         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2106         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2107         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2108         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2109         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2110
2111         /* Fill tx AHS and rx buffer */
2112         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2113                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2114                 tx_sgl_task_params.sgl_phys_addr.lo =
2115                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2116                 tx_sgl_task_params.sgl_phys_addr.hi =
2117                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2118                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2119                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2120                 if (cmd->use_slowpath)
2121                         tx_sgl_task_params.small_mid_sge = true;
2122         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2123                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2124                 rx_sgl_task_params.sgl_phys_addr.lo =
2125                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2126                 rx_sgl_task_params.sgl_phys_addr.hi =
2127                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2128                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2129                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2130         }
2131
2132         /* Add conn param */
2133         conn_params.first_burst_length = conn->session->first_burst;
2134         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2135         conn_params.max_burst_length = conn->session->max_burst;
2136         if (conn->session->initial_r2t_en)
2137                 conn_params.initial_r2t = true;
2138         if (conn->session->imm_data_en)
2139                 conn_params.immediate_data = true;
2140
2141         /* Add cmd params */
2142         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2143         cmd_params.sense_data_buffer_phys_addr.hi =
2144                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2145         /* Fill fw input params */
2146         task_params.context = fw_task_ctx;
2147         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2148         task_params.itid = tid;
2149         task_params.cq_rss_number = cq_idx;
2150         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2151                 task_params.tx_io_size = scsi_bufflen(sc);
2152         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2153                 task_params.rx_io_size = scsi_bufflen(sc);
2154
2155         sq_idx = qedi_get_wqe_idx(qedi_conn);
2156         task_params.sqe = &ep->sq[sq_idx];
2157
2158         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2159                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2160                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2161                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2162                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2163                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2164                   (u32)(cmd->io_tbl.sge_tbl_dma),
2165                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2166
2167         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2168
2169         if (task_params.tx_io_size != 0)
2170                 ptx_sgl = &tx_sgl_task_params;
2171         if (task_params.rx_io_size != 0)
2172                 prx_sgl = &rx_sgl_task_params;
2173
2174         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2175                                             &cmd_params, &cmd_pdu_header,
2176                                             ptx_sgl, prx_sgl,
2177                                             NULL);
2178         if (rval)
2179                 return -1;
2180
2181         spin_lock(&qedi_conn->list_lock);
2182         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2183         cmd->io_cmd_in_list = true;
2184         qedi_conn->active_cmd_count++;
2185         spin_unlock(&qedi_conn->list_lock);
2186
2187         qedi_ring_doorbell(qedi_conn);
2188         return 0;
2189 }
2190
2191 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2192 {
2193         struct iscsi_task_params task_params;
2194         struct qedi_endpoint *ep;
2195         struct iscsi_conn *conn = task->conn;
2196         struct qedi_conn *qedi_conn = conn->dd_data;
2197         struct qedi_cmd *cmd = task->dd_data;
2198         u16 sq_idx = 0;
2199         int rval = 0;
2200
2201         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2202                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2203                   cmd->task_id, get_itt(task->itt), task->state,
2204                   cmd->state, qedi_conn->iscsi_conn_id);
2205
2206         memset(&task_params, 0, sizeof(task_params));
2207         ep = qedi_conn->ep;
2208
2209         sq_idx = qedi_get_wqe_idx(qedi_conn);
2210
2211         task_params.sqe = &ep->sq[sq_idx];
2212         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2213         task_params.itid = cmd->task_id;
2214
2215         rval = init_cleanup_task(&task_params);
2216         if (rval)
2217                 return rval;
2218
2219         qedi_ring_doorbell(qedi_conn);
2220         return 0;
2221 }