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         struct iscsi_cls_session *cls_sess;
 159         int rval = 0;
 160
 161         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 162         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 163         cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
 164
 165         iscsi_block_session(session->cls_session);
 166         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 167         if (rval) {
 168                 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 169                 iscsi_unblock_session(session->cls_session);
 170                 goto exit_tmf_resp;
 171         }
 172
 173         iscsi_unblock_session(session->cls_session);
 174         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 175
 176         spin_lock(&session->back_lock);
 177         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 178         spin_unlock(&session->back_lock);
 179
 180 exit_tmf_resp:
 181         kfree(resp_hdr_ptr);
 182         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 183 }
 184
 185 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 186                                   union iscsi_cqe *cqe,
 187                                   struct iscsi_task *task,
 188                                   struct qedi_conn *qedi_conn)
 189
 190 {
 191         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 192         struct iscsi_session *session = conn->session;
 193         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 194         struct iscsi_tm_rsp *resp_hdr_ptr;
 195         struct iscsi_tm *tmf_hdr;
 196         struct qedi_cmd *qedi_cmd = NULL;
 197
 198         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 199
 200         qedi_cmd = task->dd_data;
 201         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_KERNEL);
 202         if (!qedi_cmd->tmf_resp_buf) {
 203                 QEDI_ERR(&qedi->dbg_ctx,
 204                          "Failed to allocate resp buf, cid=0x%x\n",
 205                           qedi_conn->iscsi_conn_id);
 206                 return;
 207         }
 208
 209         spin_lock(&session->back_lock);
 210         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 211         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 212
 213         /* Fill up the header */
 214         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 215         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 216         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 217         resp_hdr_ptr->hlength = 0;
 218
 219         hton24(resp_hdr_ptr->dlength,
 220                (cqe_tmp_response->hdr_second_dword &
 221                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 222         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 223                                       conn->session->age);
 224         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 225         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 226         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 227
 228         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 229
 230         if (likely(qedi_cmd->io_cmd_in_list)) {
 231                 qedi_cmd->io_cmd_in_list = false;
 232                 list_del_init(&qedi_cmd->io_cmd);
 233                 qedi_conn->active_cmd_count--;
 234         }
 235
 236         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 237               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 238             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 239               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 240             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 241               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 242                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 243                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 244                 goto unblock_sess;
 245         }
 246
 247         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 248
 249         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 250         kfree(resp_hdr_ptr);
 251
 252 unblock_sess:
 253         spin_unlock(&session->back_lock);
 254 }
 255
 256 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 257                                     union iscsi_cqe *cqe,
 258                                     struct iscsi_task *task,
 259                                     struct qedi_conn *qedi_conn)
 260 {
 261         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 262         struct iscsi_session *session = conn->session;
 263         struct e4_iscsi_task_context *task_ctx;
 264         struct iscsi_login_rsp *resp_hdr_ptr;
 265         struct iscsi_login_response_hdr *cqe_login_response;
 266         struct qedi_cmd *cmd;
 267         int pld_len;
 268
 269         cmd = (struct qedi_cmd *)task->dd_data;
 270
 271         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 272         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 273
 274         spin_lock(&session->back_lock);
 275         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 276         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 277         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 278         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 279         resp_hdr_ptr->hlength = 0;
 280
 281         hton24(resp_hdr_ptr->dlength,
 282                (cqe_login_response->hdr_second_dword &
 283                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 284         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 285                                       conn->session->age);
 286         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 287         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 288         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 289         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 290         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 291         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 292         pld_len = cqe_login_response->hdr_second_dword &
 293                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 294         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 295
 296         if (likely(cmd->io_cmd_in_list)) {
 297                 cmd->io_cmd_in_list = false;
 298                 list_del_init(&cmd->io_cmd);
 299                 qedi_conn->active_cmd_count--;
 300         }
 301
 302         memset(task_ctx, '\0', sizeof(*task_ctx));
 303
 304         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 305                              qedi_conn->gen_pdu.resp_buf,
 306                              (qedi_conn->gen_pdu.resp_wr_ptr -
 307                              qedi_conn->gen_pdu.resp_buf));
 308
 309         spin_unlock(&session->back_lock);
 310         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 311                   "Freeing tid=0x%x for cid=0x%x\n",
 312                   cmd->task_id, qedi_conn->iscsi_conn_id);
 313         cmd->state = RESPONSE_RECEIVED;
 314         qedi_clear_task_idx(qedi, cmd->task_id);
 315 }
 316
 317 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 318                                 struct iscsi_cqe_unsolicited *cqe,
 319                                 char *ptr, int len)
 320 {
 321         u16 idx = 0;
 322
 323         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 324                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 325                   len, qedi->bdq_prod_idx,
 326                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 327
 328         /* Obtain buffer address from rqe_opaque */
 329         idx = cqe->rqe_opaque.lo;
 330         if (idx > (QEDI_BDQ_NUM - 1)) {
 331                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 332                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 333                           idx);
 334                 return;
 335         }
 336
 337         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 338                   "rqe_opaque.lo [0x%p], rqe_opaque.hi [0x%p], idx [%d]\n",
 339                   cqe->rqe_opaque.lo, cqe->rqe_opaque.hi, idx);
 340
 341         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 342                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 343         switch (cqe->unsol_cqe_type) {
 344         case ISCSI_CQE_UNSOLICITED_SINGLE:
 345         case ISCSI_CQE_UNSOLICITED_FIRST:
 346                 if (len)
 347                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 348                 break;
 349         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 350         case ISCSI_CQE_UNSOLICITED_LAST:
 351                 break;
 352         default:
 353                 break;
 354         }
 355 }
 356
 357 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 358                                 struct iscsi_cqe_unsolicited *cqe,
 359                                 int count)
 360 {
 361         u16 tmp;
 362         u16 idx = 0;
 363         struct scsi_bd *pbl;
 364
 365         /* Obtain buffer address from rqe_opaque */
 366         idx = cqe->rqe_opaque.lo;
 367         if (idx > (QEDI_BDQ_NUM - 1)) {
 368                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 369                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 370                           idx);
 371                 return;
 372         }
 373
 374         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 375         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 376         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 377         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 378         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 379                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 380                   pbl, pbl->address.hi, pbl->address.lo, idx);
 381         pbl->opaque.hi = 0;
 382         pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(idx));
 383
 384         /* Increment producer to let f/w know we've handled the frame */
 385         qedi->bdq_prod_idx += count;
 386
 387         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 388         tmp = readw(qedi->bdq_primary_prod);
 389
 390         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 391         tmp = readw(qedi->bdq_secondary_prod);
 392 }
 393
 394 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 395                                       struct iscsi_cqe_unsolicited *cqe,
 396                                       u32 pdu_len, u32 num_bdqs,
 397                                       char *bdq_data)
 398 {
 399         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 400                   "num_bdqs [%d]\n", num_bdqs);
 401
 402         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 403         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 404 }
 405
 406 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 407                                    union iscsi_cqe *cqe,
 408                                    struct iscsi_task *task,
 409                                    struct qedi_conn *qedi_conn, u16 que_idx)
 410 {
 411         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 412         struct iscsi_session *session = conn->session;
 413         struct iscsi_nop_in_hdr *cqe_nop_in;
 414         struct iscsi_nopin *hdr;
 415         struct qedi_cmd *cmd;
 416         int tgt_async_nop = 0;
 417         u32 lun[2];
 418         u32 pdu_len, num_bdqs;
 419         char bdq_data[QEDI_BDQ_BUF_SIZE];
 420         unsigned long flags;
 421
 422         spin_lock_bh(&session->back_lock);
 423         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 424
 425         pdu_len = cqe_nop_in->hdr_second_dword &
 426                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 427         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 428
 429         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 430         memset(hdr, 0, sizeof(struct iscsi_hdr));
 431         hdr->opcode = cqe_nop_in->opcode;
 432         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 433         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 434         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 435         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 436
 437         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 438                 spin_lock_irqsave(&qedi->hba_lock, flags);
 439                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 440                                           pdu_len, num_bdqs, bdq_data);
 441                 hdr->itt = RESERVED_ITT;
 442                 tgt_async_nop = 1;
 443                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 444                 goto done;
 445         }
 446
 447         /* Response to one of our nop-outs */
 448         if (task) {
 449                 cmd = task->dd_data;
 450                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 451                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 452                                      conn->session->age);
 453                 lun[0] = 0xffffffff;
 454                 lun[1] = 0xffffffff;
 455                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 456                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 457                           "Freeing tid=0x%x for cid=0x%x\n",
 458                           cmd->task_id, qedi_conn->iscsi_conn_id);
 459                 cmd->state = RESPONSE_RECEIVED;
 460                 spin_lock(&qedi_conn->list_lock);
 461                 if (likely(cmd->io_cmd_in_list)) {
 462                         cmd->io_cmd_in_list = false;
 463                         list_del_init(&cmd->io_cmd);
 464                         qedi_conn->active_cmd_count--;
 465                 }
 466
 467                 spin_unlock(&qedi_conn->list_lock);
 468                 qedi_clear_task_idx(qedi, cmd->task_id);
 469         }
 470
 471 done:
 472         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 473
 474         spin_unlock_bh(&session->back_lock);
 475         return tgt_async_nop;
 476 }
 477
 478 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 479                                     union iscsi_cqe *cqe,
 480                                     struct iscsi_task *task,
 481                                     struct qedi_conn *qedi_conn,
 482                                     u16 que_idx)
 483 {
 484         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 485         struct iscsi_session *session = conn->session;
 486         struct iscsi_async_msg_hdr *cqe_async_msg;
 487         struct iscsi_async *resp_hdr;
 488         u32 lun[2];
 489         u32 pdu_len, num_bdqs;
 490         char bdq_data[QEDI_BDQ_BUF_SIZE];
 491         unsigned long flags;
 492
 493         spin_lock_bh(&session->back_lock);
 494
 495         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 496         pdu_len = cqe_async_msg->hdr_second_dword &
 497                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 498         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 499
 500         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 501                 spin_lock_irqsave(&qedi->hba_lock, flags);
 502                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 503                                           pdu_len, num_bdqs, bdq_data);
 504                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 505         }
 506
 507         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 508         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 509         resp_hdr->opcode = cqe_async_msg->opcode;
 510         resp_hdr->flags = 0x80;
 511
 512         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 513         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 514         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 515         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 516         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 517         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 518
 519         resp_hdr->async_event = cqe_async_msg->async_event;
 520         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 521
 522         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 523         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 524         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 525
 526         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 527                              pdu_len);
 528
 529         spin_unlock_bh(&session->back_lock);
 530 }
 531
 532 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 533                                      union iscsi_cqe *cqe,
 534                                      struct iscsi_task *task,
 535                                      struct qedi_conn *qedi_conn,
 536                                      uint16_t que_idx)
 537 {
 538         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 539         struct iscsi_session *session = conn->session;
 540         struct iscsi_reject_hdr *cqe_reject;
 541         struct iscsi_reject *hdr;
 542         u32 pld_len, num_bdqs;
 543         unsigned long flags;
 544
 545         spin_lock_bh(&session->back_lock);
 546         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 547         pld_len = cqe_reject->hdr_second_dword &
 548                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 549         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 550
 551         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 552                 spin_lock_irqsave(&qedi->hba_lock, flags);
 553                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 554                                           pld_len, num_bdqs, conn->data);
 555                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 556         }
 557         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 558         memset(hdr, 0, sizeof(struct iscsi_hdr));
 559         hdr->opcode = cqe_reject->opcode;
 560         hdr->reason = cqe_reject->hdr_reason;
 561         hdr->flags = cqe_reject->hdr_flags;
 562         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 563                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 564         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 565         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 566         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 567         hdr->ffffffff = cpu_to_be32(0xffffffff);
 568
 569         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 570                              conn->data, pld_len);
 571         spin_unlock_bh(&session->back_lock);
 572 }
 573
 574 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 575                                  union iscsi_cqe *cqe,
 576                                  struct iscsi_task *task,
 577                                  struct iscsi_conn *conn)
 578 {
 579         struct scsi_cmnd *sc_cmd;
 580         struct qedi_cmd *cmd = task->dd_data;
 581         struct iscsi_session *session = conn->session;
 582         struct iscsi_scsi_rsp *hdr;
 583         struct iscsi_data_in_hdr *cqe_data_in;
 584         int datalen = 0;
 585         struct qedi_conn *qedi_conn;
 586         u32 iscsi_cid;
 587         u8 cqe_err_bits = 0;
 588
 589         iscsi_cid  = cqe->cqe_common.conn_id;
 590         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 591
 592         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 593         cqe_err_bits =
 594                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 595
 596         spin_lock_bh(&session->back_lock);
 597         /* get the scsi command */
 598         sc_cmd = cmd->scsi_cmd;
 599
 600         if (!sc_cmd) {
 601                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 602                 goto error;
 603         }
 604
 605         if (!sc_cmd->SCp.ptr) {
 606                 QEDI_WARN(&qedi->dbg_ctx,
 607                           "SCp.ptr is NULL, returned in another context.\n");
 608                 goto error;
 609         }
 610
 611         if (!sc_cmd->request) {
 612                 QEDI_WARN(&qedi->dbg_ctx,
 613                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 614                           sc_cmd);
 615                 goto error;
 616         }
 617
 618         if (!sc_cmd->request->special) {
 619                 QEDI_WARN(&qedi->dbg_ctx,
 620                           "request->special is NULL so request not valid, sc_cmd=%p.\n",
 621                           sc_cmd);
 622                 goto error;
 623         }
 624
 625         if (!sc_cmd->request->q) {
 626                 QEDI_WARN(&qedi->dbg_ctx,
 627                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 628                           sc_cmd);
 629                 goto error;
 630         }
 631
 632         qedi_iscsi_unmap_sg_list(cmd);
 633
 634         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 635         hdr->opcode = cqe_data_in->opcode;
 636         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 637         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 638         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 639         hdr->response = cqe_data_in->reserved1;
 640         hdr->cmd_status = cqe_data_in->status_rsvd;
 641         hdr->flags = cqe_data_in->flags;
 642         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 643
 644         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 645                 datalen = cqe_data_in->reserved2 &
 646                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 647                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 648         }
 649
 650         /* If f/w reports data underrun err then set residual to IO transfer
 651          * length, set Underrun flag and clear Overrun flag explicitly
 652          */
 653         if (unlikely(cqe_err_bits &&
 654                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 655                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 656                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 657                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 658                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 659                           scsi_bufflen(sc_cmd));
 660                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 661                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 662                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 663         }
 664
 665         spin_lock(&qedi_conn->list_lock);
 666         if (likely(cmd->io_cmd_in_list)) {
 667                 cmd->io_cmd_in_list = false;
 668                 list_del_init(&cmd->io_cmd);
 669                 qedi_conn->active_cmd_count--;
 670         }
 671         spin_unlock(&qedi_conn->list_lock);
 672
 673         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 674                   "Freeing tid=0x%x for cid=0x%x\n",
 675                   cmd->task_id, qedi_conn->iscsi_conn_id);
 676         cmd->state = RESPONSE_RECEIVED;
 677         if (qedi_io_tracing)
 678                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 679
 680         qedi_clear_task_idx(qedi, cmd->task_id);
 681         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 682                              conn->data, datalen);
 683 error:
 684         spin_unlock_bh(&session->back_lock);
 685 }
 686
 687 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 688                                   union iscsi_cqe *cqe,
 689                                   struct iscsi_task *task,
 690                                   struct qedi_conn *conn, uint16_t que_idx)
 691 {
 692         struct iscsi_conn *iscsi_conn;
 693         u32 hdr_opcode;
 694
 695         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 696         iscsi_conn = conn->cls_conn->dd_data;
 697
 698         switch (hdr_opcode) {
 699         case ISCSI_OPCODE_SCSI_RESPONSE:
 700         case ISCSI_OPCODE_DATA_IN:
 701                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 702                 break;
 703         case ISCSI_OPCODE_LOGIN_RESPONSE:
 704                 qedi_process_login_resp(qedi, cqe, task, conn);
 705                 break;
 706         case ISCSI_OPCODE_TMF_RESPONSE:
 707                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 708                 break;
 709         case ISCSI_OPCODE_TEXT_RESPONSE:
 710                 qedi_process_text_resp(qedi, cqe, task, conn);
 711                 break;
 712         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 713                 qedi_process_logout_resp(qedi, cqe, task, conn);
 714                 break;
 715         case ISCSI_OPCODE_NOP_IN:
 716                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 717                 break;
 718         default:
 719                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 720         }
 721 }
 722
 723 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 724                                           struct iscsi_cqe_solicited *cqe,
 725                                           struct iscsi_task *task,
 726                                           struct qedi_conn *qedi_conn)
 727 {
 728         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 729         struct iscsi_session *session = conn->session;
 730         struct qedi_cmd *cmd = task->dd_data;
 731
 732         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 733                   "itid=0x%x, cmd task id=0x%x\n",
 734                   cqe->itid, cmd->task_id);
 735
 736         cmd->state = RESPONSE_RECEIVED;
 737         qedi_clear_task_idx(qedi, cmd->task_id);
 738
 739         spin_lock_bh(&session->back_lock);
 740         __iscsi_put_task(task);
 741         spin_unlock_bh(&session->back_lock);
 742 }
 743
 744 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 745                                           struct iscsi_cqe_solicited *cqe,
 746                                           struct iscsi_task *task,
 747                                           struct iscsi_conn *conn)
 748 {
 749         struct qedi_work_map *work, *work_tmp;
 750         u32 proto_itt = cqe->itid;
 751         u32 ptmp_itt = 0;
 752         itt_t protoitt = 0;
 753         int found = 0;
 754         struct qedi_cmd *qedi_cmd = NULL;
 755         u32 rtid = 0;
 756         u32 iscsi_cid;
 757         struct qedi_conn *qedi_conn;
 758         struct qedi_cmd *dbg_cmd;
 759         struct iscsi_task *mtask;
 760         struct iscsi_tm *tmf_hdr = NULL;
 761
 762         iscsi_cid = cqe->conn_id;
 763         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 764
 765         /* Based on this itt get the corresponding qedi_cmd */
 766         spin_lock_bh(&qedi_conn->tmf_work_lock);
 767         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 768                                  list) {
 769                 if (work->rtid == proto_itt) {
 770                         /* We found the command */
 771                         qedi_cmd = work->qedi_cmd;
 772                         if (!qedi_cmd->list_tmf_work) {
 773                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 774                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 775                                           proto_itt, qedi_conn->iscsi_conn_id);
 776                                 WARN_ON(1);
 777                         }
 778                         found = 1;
 779                         mtask = qedi_cmd->task;
 780                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 781                         rtid = work->rtid;
 782
 783                         list_del_init(&work->list);
 784                         kfree(work);
 785                         qedi_cmd->list_tmf_work = NULL;
 786                 }
 787         }
 788         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 789
 790         if (found) {
 791                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 792                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 793                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 794
 795                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 796                     ISCSI_TM_FUNC_ABORT_TASK) {
 797                         spin_lock_bh(&conn->session->back_lock);
 798
 799                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 800                                              conn->session->age);
 801                         task = iscsi_itt_to_task(conn, protoitt);
 802
 803                         spin_unlock_bh(&conn->session->back_lock);
 804
 805                         if (!task) {
 806                                 QEDI_NOTICE(&qedi->dbg_ctx,
 807                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 808                                             get_itt(tmf_hdr->rtt),
 809                                             qedi_conn->iscsi_conn_id);
 810                                 return;
 811                         }
 812
 813                         dbg_cmd = task->dd_data;
 814
 815                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 816                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 817                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 818                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 819
 820                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 821                                 qedi_cmd->state = CLEANUP_RECV;
 822
 823                         qedi_clear_task_idx(qedi_conn->qedi, rtid);
 824
 825                         spin_lock(&qedi_conn->list_lock);
 826                         list_del_init(&dbg_cmd->io_cmd);
 827                         qedi_conn->active_cmd_count--;
 828                         spin_unlock(&qedi_conn->list_lock);
 829                         qedi_cmd->state = CLEANUP_RECV;
 830                         wake_up_interruptible(&qedi_conn->wait_queue);
 831                 }
 832         } else if (qedi_conn->cmd_cleanup_req > 0) {
 833                 spin_lock_bh(&conn->session->back_lock);
 834                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 835                 protoitt = build_itt(ptmp_itt, conn->session->age);
 836                 task = iscsi_itt_to_task(conn, protoitt);
 837                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 838                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 839                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 840                           qedi_conn->iscsi_conn_id);
 841
 842                 spin_unlock_bh(&conn->session->back_lock);
 843                 if (!task) {
 844                         QEDI_NOTICE(&qedi->dbg_ctx,
 845                                     "task is null, itid=0x%x, cid=0x%x\n",
 846                                     cqe->itid, qedi_conn->iscsi_conn_id);
 847                         return;
 848                 }
 849                 qedi_conn->cmd_cleanup_cmpl++;
 850                 wake_up(&qedi_conn->wait_queue);
 851
 852                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 853                           "Freeing tid=0x%x for cid=0x%x\n",
 854                           cqe->itid, qedi_conn->iscsi_conn_id);
 855                 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
 856
 857         } else {
 858                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 859                 protoitt = build_itt(ptmp_itt, conn->session->age);
 860                 task = iscsi_itt_to_task(conn, protoitt);
 861                 QEDI_ERR(&qedi->dbg_ctx,
 862                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 863                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 864         }
 865 }
 866
 867 void qedi_fp_process_cqes(struct qedi_work *work)
 868 {
 869         struct qedi_ctx *qedi = work->qedi;
 870         union iscsi_cqe *cqe = &work->cqe;
 871         struct iscsi_task *task = NULL;
 872         struct iscsi_nopout *nopout_hdr;
 873         struct qedi_conn *q_conn;
 874         struct iscsi_conn *conn;
 875         struct qedi_cmd *qedi_cmd;
 876         u32 comp_type;
 877         u32 iscsi_cid;
 878         u32 hdr_opcode;
 879         u16 que_idx = work->que_idx;
 880         u8 cqe_err_bits = 0;
 881
 882         comp_type = cqe->cqe_common.cqe_type;
 883         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 884         cqe_err_bits =
 885                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 886
 887         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 888                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 889                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 890
 891         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 892                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 893                 return;
 894         }
 895
 896         iscsi_cid  = cqe->cqe_common.conn_id;
 897         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 898         if (!q_conn) {
 899                 QEDI_WARN(&qedi->dbg_ctx,
 900                           "Session no longer exists for cid=0x%x!!\n",
 901                           iscsi_cid);
 902                 return;
 903         }
 904
 905         conn = q_conn->cls_conn->dd_data;
 906
 907         if (unlikely(cqe_err_bits &&
 908                      GET_FIELD(cqe_err_bits,
 909                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 910                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 911                 return;
 912         }
 913
 914         switch (comp_type) {
 915         case ISCSI_CQE_TYPE_SOLICITED:
 916         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 917                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 918                 task = qedi_cmd->task;
 919                 if (!task) {
 920                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 921                         return;
 922                 }
 923
 924                 /* Process NOPIN local completion */
 925                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 926                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 927                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 928                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 929                                                       task, q_conn);
 930                 } else {
 931                         cqe->cqe_solicited.itid =
 932                                                qedi_get_itt(cqe->cqe_solicited);
 933                         /* Process other solicited responses */
 934                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 935                 }
 936                 break;
 937         case ISCSI_CQE_TYPE_UNSOLICITED:
 938                 switch (hdr_opcode) {
 939                 case ISCSI_OPCODE_NOP_IN:
 940                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 941                                                 que_idx);
 942                         break;
 943                 case ISCSI_OPCODE_ASYNC_MSG:
 944                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 945                                                 que_idx);
 946                         break;
 947                 case ISCSI_OPCODE_REJECT:
 948                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 949                                                  que_idx);
 950                         break;
 951                 }
 952                 goto exit_fp_process;
 953         case ISCSI_CQE_TYPE_DUMMY:
 954                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 955                 goto exit_fp_process;
 956         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 957                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 958                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 959                                               conn);
 960                 goto exit_fp_process;
 961         default:
 962                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 963                 break;
 964         }
 965
 966 exit_fp_process:
 967         return;
 968 }
 969
 970 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 971 {
 972         struct iscsi_db_data dbell = { 0 };
 973
 974         dbell.agg_flags = 0;
 975
 976         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 977         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 978         dbell.params |=
 979                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 980
 981         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 982         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
 983
 984         /* Make sure fw write idx is coherent, and include both memory barriers
 985          * as a failsafe as for some architectures the call is the same but on
 986          * others they are two different assembly operations.
 987          */
 988         wmb();
 989         mmiowb();
 990         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
 991                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
 992                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
 993                   qedi_conn->iscsi_conn_id);
 994 }
 995
 996 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
 997 {
 998         struct qedi_endpoint *ep;
 999         u16 rval;
1000
1001         ep = qedi_conn->ep;
1002         rval = ep->sq_prod_idx;
1003
1004         /* Increament SQ index */
1005         ep->sq_prod_idx++;
1006         ep->fw_sq_prod_idx++;
1007         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1008                 ep->sq_prod_idx = 0;
1009
1010         return rval;
1011 }
1012
1013 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1014                           struct iscsi_task *task)
1015 {
1016         struct iscsi_login_req_hdr login_req_pdu_header;
1017         struct scsi_sgl_task_params tx_sgl_task_params;
1018         struct scsi_sgl_task_params rx_sgl_task_params;
1019         struct iscsi_task_params task_params;
1020         struct e4_iscsi_task_context *fw_task_ctx;
1021         struct qedi_ctx *qedi = qedi_conn->qedi;
1022         struct iscsi_login_req *login_hdr;
1023         struct scsi_sge *resp_sge = NULL;
1024         struct qedi_cmd *qedi_cmd;
1025         struct qedi_endpoint *ep;
1026         s16 tid = 0;
1027         u16 sq_idx = 0;
1028         int rval = 0;
1029
1030         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1031         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1032         ep = qedi_conn->ep;
1033         login_hdr = (struct iscsi_login_req *)task->hdr;
1034
1035         tid = qedi_get_task_idx(qedi);
1036         if (tid == -1)
1037                 return -ENOMEM;
1038
1039         fw_task_ctx =
1040              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1041                                                                tid);
1042         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1043
1044         qedi_cmd->task_id = tid;
1045
1046         memset(&task_params, 0, sizeof(task_params));
1047         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1048         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1049         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1050         /* Update header info */
1051         login_req_pdu_header.opcode = login_hdr->opcode;
1052         login_req_pdu_header.version_min = login_hdr->min_version;
1053         login_req_pdu_header.version_max = login_hdr->max_version;
1054         login_req_pdu_header.flags_attr = login_hdr->flags;
1055         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1056         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1057
1058         login_req_pdu_header.tsih = login_hdr->tsih;
1059         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1060
1061         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1062         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1063         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1064         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1065         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1066         login_req_pdu_header.exp_stat_sn = 0;
1067
1068         /* Fill tx AHS and rx buffer */
1069         tx_sgl_task_params.sgl =
1070                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1071         tx_sgl_task_params.sgl_phys_addr.lo =
1072                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1073         tx_sgl_task_params.sgl_phys_addr.hi =
1074                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1075         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1076         tx_sgl_task_params.num_sges = 1;
1077
1078         rx_sgl_task_params.sgl =
1079                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1080         rx_sgl_task_params.sgl_phys_addr.lo =
1081                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1082         rx_sgl_task_params.sgl_phys_addr.hi =
1083                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1084         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1085         rx_sgl_task_params.num_sges = 1;
1086
1087         /* Fill fw input params */
1088         task_params.context = fw_task_ctx;
1089         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1090         task_params.itid = tid;
1091         task_params.cq_rss_number = 0;
1092         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1093         task_params.rx_io_size = resp_sge->sge_len;
1094
1095         sq_idx = qedi_get_wqe_idx(qedi_conn);
1096         task_params.sqe = &ep->sq[sq_idx];
1097
1098         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1099         rval = init_initiator_login_request_task(&task_params,
1100                                                  &login_req_pdu_header,
1101                                                  &tx_sgl_task_params,
1102                                                  &rx_sgl_task_params);
1103         if (rval)
1104                 return -1;
1105
1106         spin_lock(&qedi_conn->list_lock);
1107         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1108         qedi_cmd->io_cmd_in_list = true;
1109         qedi_conn->active_cmd_count++;
1110         spin_unlock(&qedi_conn->list_lock);
1111
1112         qedi_ring_doorbell(qedi_conn);
1113         return 0;
1114 }
1115
1116 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1117                            struct iscsi_task *task)
1118 {
1119         struct iscsi_logout_req_hdr logout_pdu_header;
1120         struct scsi_sgl_task_params tx_sgl_task_params;
1121         struct scsi_sgl_task_params rx_sgl_task_params;
1122         struct iscsi_task_params task_params;
1123         struct e4_iscsi_task_context *fw_task_ctx;
1124         struct iscsi_logout *logout_hdr = NULL;
1125         struct qedi_ctx *qedi = qedi_conn->qedi;
1126         struct qedi_cmd *qedi_cmd;
1127         struct qedi_endpoint *ep;
1128         s16 tid = 0;
1129         u16 sq_idx = 0;
1130         int rval = 0;
1131
1132         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1133         logout_hdr = (struct iscsi_logout *)task->hdr;
1134         ep = qedi_conn->ep;
1135
1136         tid = qedi_get_task_idx(qedi);
1137         if (tid == -1)
1138                 return -ENOMEM;
1139
1140         fw_task_ctx =
1141              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1142                                                                tid);
1143         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1144
1145         qedi_cmd->task_id = tid;
1146
1147         memset(&task_params, 0, sizeof(task_params));
1148         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1149         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1150         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1151
1152         /* Update header info */
1153         logout_pdu_header.opcode = logout_hdr->opcode;
1154         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1155         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1156         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1157         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1158         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1159         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1160
1161         /* Fill fw input params */
1162         task_params.context = fw_task_ctx;
1163         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1164         task_params.itid = tid;
1165         task_params.cq_rss_number = 0;
1166         task_params.tx_io_size = 0;
1167         task_params.rx_io_size = 0;
1168
1169         sq_idx = qedi_get_wqe_idx(qedi_conn);
1170         task_params.sqe = &ep->sq[sq_idx];
1171         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1172
1173         rval = init_initiator_logout_request_task(&task_params,
1174                                                   &logout_pdu_header,
1175                                                   NULL, NULL);
1176         if (rval)
1177                 return -1;
1178
1179         spin_lock(&qedi_conn->list_lock);
1180         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1181         qedi_cmd->io_cmd_in_list = true;
1182         qedi_conn->active_cmd_count++;
1183         spin_unlock(&qedi_conn->list_lock);
1184
1185         qedi_ring_doorbell(qedi_conn);
1186         return 0;
1187 }
1188
1189 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1190                         struct iscsi_task *task, bool in_recovery)
1191 {
1192         int rval;
1193         struct iscsi_task *ctask;
1194         struct qedi_cmd *cmd, *cmd_tmp;
1195         struct iscsi_tm *tmf_hdr;
1196         unsigned int lun = 0;
1197         bool lun_reset = false;
1198         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1199         struct iscsi_session *session = conn->session;
1200
1201         /* From recovery, task is NULL or from tmf resp valid task */
1202         if (task) {
1203                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1204
1205                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1206                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1207                         lun_reset = true;
1208                         lun = scsilun_to_int(&tmf_hdr->lun);
1209                 }
1210         }
1211
1212         qedi_conn->cmd_cleanup_req = 0;
1213         qedi_conn->cmd_cleanup_cmpl = 0;
1214
1215         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1216                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1217                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1218                   in_recovery, lun_reset);
1219
1220         if (lun_reset)
1221                 spin_lock_bh(&session->back_lock);
1222
1223         spin_lock(&qedi_conn->list_lock);
1224
1225         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1226                                  io_cmd) {
1227                 ctask = cmd->task;
1228                 if (ctask == task)
1229                         continue;
1230
1231                 if (lun_reset) {
1232                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1233                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1234                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1235                                           cmd->task_id, get_itt(ctask->itt),
1236                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1237                                           ctask->state, cmd->state,
1238                                           qedi_conn->iscsi_conn_id);
1239                                 if (cmd->scsi_cmd->device->lun != lun)
1240                                         continue;
1241                         }
1242                 }
1243                 qedi_conn->cmd_cleanup_req++;
1244                 qedi_iscsi_cleanup_task(ctask, true);
1245
1246                 list_del_init(&cmd->io_cmd);
1247                 qedi_conn->active_cmd_count--;
1248                 QEDI_WARN(&qedi->dbg_ctx,
1249                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1250                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1251         }
1252
1253         spin_unlock(&qedi_conn->list_lock);
1254
1255         if (lun_reset)
1256                 spin_unlock_bh(&session->back_lock);
1257
1258         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1259                   "cmd_cleanup_req=%d, cid=0x%x\n",
1260                   qedi_conn->cmd_cleanup_req,
1261                   qedi_conn->iscsi_conn_id);
1262
1263         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1264                                                  ((qedi_conn->cmd_cleanup_req ==
1265                                                  qedi_conn->cmd_cleanup_cmpl) ||
1266                                                  qedi_conn->ep),
1267                                                  5 * HZ);
1268         if (rval) {
1269                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1270                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1271                           qedi_conn->cmd_cleanup_req,
1272                           qedi_conn->cmd_cleanup_cmpl,
1273                           qedi_conn->iscsi_conn_id);
1274
1275                 return 0;
1276         }
1277
1278         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1279                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1280                   qedi_conn->cmd_cleanup_req,
1281                   qedi_conn->cmd_cleanup_cmpl,
1282                   qedi_conn->iscsi_conn_id);
1283
1284         iscsi_host_for_each_session(qedi->shost,
1285                                     qedi_mark_device_missing);
1286         qedi_ops->common->drain(qedi->cdev);
1287
1288         /* Enable IOs for all other sessions except current.*/
1289         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1290                                               (qedi_conn->cmd_cleanup_req ==
1291                                                qedi_conn->cmd_cleanup_cmpl),
1292                                               5 * HZ)) {
1293                 iscsi_host_for_each_session(qedi->shost,
1294                                             qedi_mark_device_available);
1295                 return -1;
1296         }
1297
1298         iscsi_host_for_each_session(qedi->shost,
1299                                     qedi_mark_device_available);
1300
1301         return 0;
1302 }
1303
1304 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1305                   struct iscsi_task *task)
1306 {
1307         struct qedi_endpoint *qedi_ep;
1308         int rval;
1309
1310         qedi_ep = qedi_conn->ep;
1311         qedi_conn->cmd_cleanup_req = 0;
1312         qedi_conn->cmd_cleanup_cmpl = 0;
1313
1314         if (!qedi_ep) {
1315                 QEDI_WARN(&qedi->dbg_ctx,
1316                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1317                           qedi_conn->iscsi_conn_id);
1318                 return;
1319         }
1320
1321         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1322                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1323                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1324
1325         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1326
1327         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1328         if (rval) {
1329                 QEDI_ERR(&qedi->dbg_ctx,
1330                          "fatal error, need hard reset, cid=0x%x\n",
1331                          qedi_conn->iscsi_conn_id);
1332                 WARN_ON(1);
1333         }
1334 }
1335
1336 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1337                                          struct qedi_conn *qedi_conn,
1338                                          struct iscsi_task *task,
1339                                          struct qedi_cmd *qedi_cmd,
1340                                          struct qedi_work_map *list_work)
1341 {
1342         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1343         int wait;
1344
1345         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1346                                                  ((qedi_cmd->state ==
1347                                                    CLEANUP_RECV) ||
1348                                                  ((qedi_cmd->type == TYPEIO) &&
1349                                                   (cmd->state ==
1350                                                    RESPONSE_RECEIVED))),
1351                                                  5 * HZ);
1352         if (!wait) {
1353                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1354
1355                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1356                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1357                           cmd->task_id, qedi_conn->iscsi_conn_id);
1358
1359                 return -1;
1360         }
1361         return 0;
1362 }
1363
1364 static void qedi_tmf_work(struct work_struct *work)
1365 {
1366         struct qedi_cmd *qedi_cmd =
1367                 container_of(work, struct qedi_cmd, tmf_work);
1368         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1369         struct qedi_ctx *qedi = qedi_conn->qedi;
1370         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1371         struct iscsi_cls_session *cls_sess;
1372         struct qedi_work_map *list_work = NULL;
1373         struct iscsi_task *mtask;
1374         struct qedi_cmd *cmd;
1375         struct iscsi_task *ctask;
1376         struct iscsi_tm *tmf_hdr;
1377         s16 rval = 0;
1378         s16 tid = 0;
1379
1380         mtask = qedi_cmd->task;
1381         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1382         cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
1383         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1384
1385         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1386         if (!ctask || !ctask->sc) {
1387                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1388                 goto abort_ret;
1389         }
1390
1391         cmd = (struct qedi_cmd *)ctask->dd_data;
1392         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1393                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1394                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1395                   qedi_conn->iscsi_conn_id);
1396
1397         if (qedi_do_not_recover) {
1398                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1399                          qedi_do_not_recover);
1400                 goto abort_ret;
1401         }
1402
1403         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1404         if (!list_work) {
1405                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1406                 goto abort_ret;
1407         }
1408
1409         qedi_cmd->type = TYPEIO;
1410         list_work->qedi_cmd = qedi_cmd;
1411         list_work->rtid = cmd->task_id;
1412         list_work->state = QEDI_WORK_SCHEDULED;
1413         qedi_cmd->list_tmf_work = list_work;
1414
1415         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1416                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1417                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1418                   tmf_hdr->flags);
1419
1420         spin_lock_bh(&qedi_conn->tmf_work_lock);
1421         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1422         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1423
1424         qedi_iscsi_cleanup_task(ctask, false);
1425
1426         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1427                                              list_work);
1428         if (rval == -1) {
1429                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1430                           "FW cleanup got escalated, cid=0x%x\n",
1431                           qedi_conn->iscsi_conn_id);
1432                 goto ldel_exit;
1433         }
1434
1435         tid = qedi_get_task_idx(qedi);
1436         if (tid == -1) {
1437                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1438                          qedi_conn->iscsi_conn_id);
1439                 goto ldel_exit;
1440         }
1441
1442         qedi_cmd->task_id = tid;
1443         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1444
1445 abort_ret:
1446         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1447         return;
1448
1449 ldel_exit:
1450         spin_lock_bh(&qedi_conn->tmf_work_lock);
1451         if (!qedi_cmd->list_tmf_work) {
1452                 list_del_init(&list_work->list);
1453                 qedi_cmd->list_tmf_work = NULL;
1454                 kfree(list_work);
1455         }
1456         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1457
1458         spin_lock(&qedi_conn->list_lock);
1459         list_del_init(&cmd->io_cmd);
1460         qedi_conn->active_cmd_count--;
1461         spin_unlock(&qedi_conn->list_lock);
1462
1463         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1464 }
1465
1466 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1467                                struct iscsi_task *mtask)
1468 {
1469         struct iscsi_tmf_request_hdr tmf_pdu_header;
1470         struct iscsi_task_params task_params;
1471         struct qedi_ctx *qedi = qedi_conn->qedi;
1472         struct e4_iscsi_task_context *fw_task_ctx;
1473         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1474         struct iscsi_task *ctask;
1475         struct iscsi_tm *tmf_hdr;
1476         struct qedi_cmd *qedi_cmd;
1477         struct qedi_cmd *cmd;
1478         struct qedi_endpoint *ep;
1479         u32 scsi_lun[2];
1480         s16 tid = 0;
1481         u16 sq_idx = 0;
1482         int rval = 0;
1483
1484         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1485         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1486         ep = qedi_conn->ep;
1487         if (!ep)
1488                 return -ENODEV;
1489
1490         tid = qedi_get_task_idx(qedi);
1491         if (tid == -1)
1492                 return -ENOMEM;
1493
1494         fw_task_ctx =
1495              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1496                                                                tid);
1497         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1498
1499         qedi_cmd->task_id = tid;
1500
1501         memset(&task_params, 0, sizeof(task_params));
1502         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1503
1504         /* Update header info */
1505         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1506         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1507         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1508
1509         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1510         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1511         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1512
1513         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1514              ISCSI_TM_FUNC_ABORT_TASK) {
1515                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1516                 if (!ctask || !ctask->sc) {
1517                         QEDI_ERR(&qedi->dbg_ctx,
1518                                  "Could not get reference task\n");
1519                         return 0;
1520                 }
1521                 cmd = (struct qedi_cmd *)ctask->dd_data;
1522                 tmf_pdu_header.rtt =
1523                                 qedi_set_itt(cmd->task_id,
1524                                              get_itt(tmf_hdr->rtt));
1525         } else {
1526                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1527         }
1528
1529         tmf_pdu_header.opcode = tmf_hdr->opcode;
1530         tmf_pdu_header.function = tmf_hdr->flags;
1531         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1532         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1533
1534         /* Fill fw input params */
1535         task_params.context = fw_task_ctx;
1536         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1537         task_params.itid = tid;
1538         task_params.cq_rss_number = 0;
1539         task_params.tx_io_size = 0;
1540         task_params.rx_io_size = 0;
1541
1542         sq_idx = qedi_get_wqe_idx(qedi_conn);
1543         task_params.sqe = &ep->sq[sq_idx];
1544
1545         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1546         rval = init_initiator_tmf_request_task(&task_params,
1547                                                &tmf_pdu_header);
1548         if (rval)
1549                 return -1;
1550
1551         spin_lock(&qedi_conn->list_lock);
1552         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1553         qedi_cmd->io_cmd_in_list = true;
1554         qedi_conn->active_cmd_count++;
1555         spin_unlock(&qedi_conn->list_lock);
1556
1557         qedi_ring_doorbell(qedi_conn);
1558         return 0;
1559 }
1560
1561 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1562                           struct iscsi_task *mtask)
1563 {
1564         struct qedi_ctx *qedi = qedi_conn->qedi;
1565         struct iscsi_tm *tmf_hdr;
1566         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1567         s16 tid = 0;
1568
1569         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1570         qedi_cmd->task = mtask;
1571
1572         /* If abort task then schedule the work and return */
1573         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1574             ISCSI_TM_FUNC_ABORT_TASK) {
1575                 qedi_cmd->state = CLEANUP_WAIT;
1576                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1577                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1578
1579         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1580                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1581                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1582                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1583                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1584                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1585                 tid = qedi_get_task_idx(qedi);
1586                 if (tid == -1) {
1587                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1588                                  qedi_conn->iscsi_conn_id);
1589                         return -1;
1590                 }
1591                 qedi_cmd->task_id = tid;
1592
1593                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1594
1595         } else {
1596                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1597                          qedi_conn->iscsi_conn_id);
1598                 return -1;
1599         }
1600
1601         return 0;
1602 }
1603
1604 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1605                          struct iscsi_task *task)
1606 {
1607         struct iscsi_text_request_hdr text_request_pdu_header;
1608         struct scsi_sgl_task_params tx_sgl_task_params;
1609         struct scsi_sgl_task_params rx_sgl_task_params;
1610         struct iscsi_task_params task_params;
1611         struct e4_iscsi_task_context *fw_task_ctx;
1612         struct qedi_ctx *qedi = qedi_conn->qedi;
1613         struct iscsi_text *text_hdr;
1614         struct scsi_sge *req_sge = NULL;
1615         struct scsi_sge *resp_sge = NULL;
1616         struct qedi_cmd *qedi_cmd;
1617         struct qedi_endpoint *ep;
1618         s16 tid = 0;
1619         u16 sq_idx = 0;
1620         int rval = 0;
1621
1622         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1623         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1624         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1625         text_hdr = (struct iscsi_text *)task->hdr;
1626         ep = qedi_conn->ep;
1627
1628         tid = qedi_get_task_idx(qedi);
1629         if (tid == -1)
1630                 return -ENOMEM;
1631
1632         fw_task_ctx =
1633              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1634                                                                tid);
1635         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1636
1637         qedi_cmd->task_id = tid;
1638
1639         memset(&task_params, 0, sizeof(task_params));
1640         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1641         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1642         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1643
1644         /* Update header info */
1645         text_request_pdu_header.opcode = text_hdr->opcode;
1646         text_request_pdu_header.flags_attr = text_hdr->flags;
1647
1648         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1649         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1650         text_request_pdu_header.ttt = text_hdr->ttt;
1651         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1652         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1653         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1654
1655         /* Fill tx AHS and rx buffer */
1656         tx_sgl_task_params.sgl =
1657                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1658         tx_sgl_task_params.sgl_phys_addr.lo =
1659                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1660         tx_sgl_task_params.sgl_phys_addr.hi =
1661                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1662         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1663         tx_sgl_task_params.num_sges = 1;
1664
1665         rx_sgl_task_params.sgl =
1666                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1667         rx_sgl_task_params.sgl_phys_addr.lo =
1668                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1669         rx_sgl_task_params.sgl_phys_addr.hi =
1670                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1671         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1672         rx_sgl_task_params.num_sges = 1;
1673
1674         /* Fill fw input params */
1675         task_params.context = fw_task_ctx;
1676         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1677         task_params.itid = tid;
1678         task_params.cq_rss_number = 0;
1679         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1680         task_params.rx_io_size = resp_sge->sge_len;
1681
1682         sq_idx = qedi_get_wqe_idx(qedi_conn);
1683         task_params.sqe = &ep->sq[sq_idx];
1684
1685         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1686         rval = init_initiator_text_request_task(&task_params,
1687                                                 &text_request_pdu_header,
1688                                                 &tx_sgl_task_params,
1689                                                 &rx_sgl_task_params);
1690         if (rval)
1691                 return -1;
1692
1693         spin_lock(&qedi_conn->list_lock);
1694         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1695         qedi_cmd->io_cmd_in_list = true;
1696         qedi_conn->active_cmd_count++;
1697         spin_unlock(&qedi_conn->list_lock);
1698
1699         qedi_ring_doorbell(qedi_conn);
1700         return 0;
1701 }
1702
1703 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1704                            struct iscsi_task *task,
1705                            char *datap, int data_len, int unsol)
1706 {
1707         struct iscsi_nop_out_hdr nop_out_pdu_header;
1708         struct scsi_sgl_task_params tx_sgl_task_params;
1709         struct scsi_sgl_task_params rx_sgl_task_params;
1710         struct iscsi_task_params task_params;
1711         struct qedi_ctx *qedi = qedi_conn->qedi;
1712         struct e4_iscsi_task_context *fw_task_ctx;
1713         struct iscsi_nopout *nopout_hdr;
1714         struct scsi_sge *resp_sge = NULL;
1715         struct qedi_cmd *qedi_cmd;
1716         struct qedi_endpoint *ep;
1717         u32 scsi_lun[2];
1718         s16 tid = 0;
1719         u16 sq_idx = 0;
1720         int rval = 0;
1721
1722         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1723         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1724         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1725         ep = qedi_conn->ep;
1726
1727         tid = qedi_get_task_idx(qedi);
1728         if (tid == -1)
1729                 return -ENOMEM;
1730
1731         fw_task_ctx =
1732              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1733                                                                tid);
1734         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1735
1736         qedi_cmd->task_id = tid;
1737
1738         memset(&task_params, 0, sizeof(task_params));
1739         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1740         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1741         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1742
1743         /* Update header info */
1744         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1745         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1746         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1747
1748         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1749         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1750         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1751         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1752         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1753
1754         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1755
1756         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1757                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1758                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1759         } else {
1760                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1761                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1762
1763                 spin_lock(&qedi_conn->list_lock);
1764                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1765                 qedi_cmd->io_cmd_in_list = true;
1766                 qedi_conn->active_cmd_count++;
1767                 spin_unlock(&qedi_conn->list_lock);
1768         }
1769
1770         /* Fill tx AHS and rx buffer */
1771         if (data_len) {
1772                 tx_sgl_task_params.sgl =
1773                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1774                 tx_sgl_task_params.sgl_phys_addr.lo =
1775                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1776                 tx_sgl_task_params.sgl_phys_addr.hi =
1777                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1778                 tx_sgl_task_params.total_buffer_size = data_len;
1779                 tx_sgl_task_params.num_sges = 1;
1780
1781                 rx_sgl_task_params.sgl =
1782                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1783                 rx_sgl_task_params.sgl_phys_addr.lo =
1784                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1785                 rx_sgl_task_params.sgl_phys_addr.hi =
1786                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1787                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1788                 rx_sgl_task_params.num_sges = 1;
1789         }
1790
1791         /* Fill fw input params */
1792         task_params.context = fw_task_ctx;
1793         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1794         task_params.itid = tid;
1795         task_params.cq_rss_number = 0;
1796         task_params.tx_io_size = data_len;
1797         task_params.rx_io_size = resp_sge->sge_len;
1798
1799         sq_idx = qedi_get_wqe_idx(qedi_conn);
1800         task_params.sqe = &ep->sq[sq_idx];
1801
1802         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1803         rval = init_initiator_nop_out_task(&task_params,
1804                                            &nop_out_pdu_header,
1805                                            &tx_sgl_task_params,
1806                                            &rx_sgl_task_params);
1807         if (rval)
1808                 return -1;
1809
1810         qedi_ring_doorbell(qedi_conn);
1811         return 0;
1812 }
1813
1814 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1815                          int bd_index)
1816 {
1817         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1818         int frag_size, sg_frags;
1819
1820         sg_frags = 0;
1821
1822         while (sg_len) {
1823                 if (addr % QEDI_PAGE_SIZE)
1824                         frag_size =
1825                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1826                 else
1827                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1828                                     (sg_len % QEDI_BD_SPLIT_SZ);
1829
1830                 if (frag_size == 0)
1831                         frag_size = QEDI_BD_SPLIT_SZ;
1832
1833                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1834                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1835                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1836                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1837                           "split sge %d: addr=%llx, len=%x",
1838                           (bd_index + sg_frags), addr, frag_size);
1839
1840                 addr += (u64)frag_size;
1841                 sg_frags++;
1842                 sg_len -= frag_size;
1843         }
1844         return sg_frags;
1845 }
1846
1847 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1848 {
1849         struct scsi_cmnd *sc = cmd->scsi_cmd;
1850         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1851         struct scatterlist *sg;
1852         int byte_count = 0;
1853         int bd_count = 0;
1854         int sg_count;
1855         int sg_len;
1856         int sg_frags;
1857         u64 addr, end_addr;
1858         int i;
1859
1860         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1861
1862         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1863                               scsi_sg_count(sc), sc->sc_data_direction);
1864
1865         /*
1866          * New condition to send single SGE as cached-SGL.
1867          * Single SGE with length less than 64K.
1868          */
1869         sg = scsi_sglist(sc);
1870         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1871                 sg_len = sg_dma_len(sg);
1872                 addr = (u64)sg_dma_address(sg);
1873
1874                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1875                 bd[bd_count].sge_addr.hi = (addr >> 32);
1876                 bd[bd_count].sge_len = (u16)sg_len;
1877
1878                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1879                           "single-cashed-sgl: bd_count:%d addr=%llx, len=%x",
1880                           sg_count, addr, sg_len);
1881
1882                 return ++bd_count;
1883         }
1884
1885         scsi_for_each_sg(sc, sg, sg_count, i) {
1886                 sg_len = sg_dma_len(sg);
1887                 addr = (u64)sg_dma_address(sg);
1888                 end_addr = (addr + sg_len);
1889
1890                 /*
1891                  * first sg elem in the 'list',
1892                  * check if end addr is page-aligned.
1893                  */
1894                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1895                         cmd->use_slowpath = true;
1896
1897                 /*
1898                  * last sg elem in the 'list',
1899                  * check if start addr is page-aligned.
1900                  */
1901                 else if ((i == (sg_count - 1)) &&
1902                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1903                         cmd->use_slowpath = true;
1904
1905                 /*
1906                  * middle sg elements in list,
1907                  * check if start and end addr is page-aligned
1908                  */
1909                 else if ((i != 0) && (i != (sg_count - 1)) &&
1910                          ((addr % QEDI_PAGE_SIZE) ||
1911                          (end_addr % QEDI_PAGE_SIZE)))
1912                         cmd->use_slowpath = true;
1913
1914                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1915                           i, sg_len);
1916
1917                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1918                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1919                 } else {
1920                         sg_frags = 1;
1921                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1922                         bd[bd_count].sge_addr.hi = addr >> 32;
1923                         bd[bd_count].sge_len = sg_len;
1924                 }
1925                 byte_count += sg_len;
1926                 bd_count += sg_frags;
1927         }
1928
1929         if (byte_count != scsi_bufflen(sc))
1930                 QEDI_ERR(&qedi->dbg_ctx,
1931                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1932                          scsi_bufflen(sc));
1933         else
1934                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1935                           byte_count);
1936
1937         WARN_ON(byte_count != scsi_bufflen(sc));
1938
1939         return bd_count;
1940 }
1941
1942 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1943 {
1944         int bd_count;
1945         struct scsi_cmnd *sc = cmd->scsi_cmd;
1946
1947         if (scsi_sg_count(sc)) {
1948                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1949                 if (bd_count == 0)
1950                         return;
1951         } else {
1952                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1953
1954                 bd[0].sge_addr.lo = 0;
1955                 bd[0].sge_addr.hi = 0;
1956                 bd[0].sge_len = 0;
1957                 bd_count = 0;
1958         }
1959         cmd->io_tbl.sge_valid = bd_count;
1960 }
1961
1962 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1963 {
1964         u32 dword;
1965         int lpcnt;
1966         u8 *srcp;
1967
1968         lpcnt = sc->cmd_len / sizeof(dword);
1969         srcp = (u8 *)sc->cmnd;
1970         while (lpcnt--) {
1971                 memcpy(&dword, (const void *)srcp, 4);
1972                 *dstp = cpu_to_be32(dword);
1973                 srcp += 4;
1974                 dstp++;
1975         }
1976         if (sc->cmd_len & 0x3) {
1977                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1978                 *dstp = cpu_to_be32(dword);
1979         }
1980 }
1981
1982 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1983                    u16 tid, int8_t direction)
1984 {
1985         struct qedi_io_log *io_log;
1986         struct iscsi_conn *conn = task->conn;
1987         struct qedi_conn *qedi_conn = conn->dd_data;
1988         struct scsi_cmnd *sc_cmd = task->sc;
1989         unsigned long flags;
1990
1991         spin_lock_irqsave(&qedi->io_trace_lock, flags);
1992
1993         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1994         io_log->direction = direction;
1995         io_log->task_id = tid;
1996         io_log->cid = qedi_conn->iscsi_conn_id;
1997         io_log->lun = sc_cmd->device->lun;
1998         io_log->op = sc_cmd->cmnd[0];
1999         io_log->lba[0] = sc_cmd->cmnd[2];
2000         io_log->lba[1] = sc_cmd->cmnd[3];
2001         io_log->lba[2] = sc_cmd->cmnd[4];
2002         io_log->lba[3] = sc_cmd->cmnd[5];
2003         io_log->bufflen = scsi_bufflen(sc_cmd);
2004         io_log->sg_count = scsi_sg_count(sc_cmd);
2005         io_log->fast_sgs = qedi->fast_sgls;
2006         io_log->cached_sgs = qedi->cached_sgls;
2007         io_log->slow_sgs = qedi->slow_sgls;
2008         io_log->cached_sge = qedi->use_cached_sge;
2009         io_log->slow_sge = qedi->use_slow_sge;
2010         io_log->fast_sge = qedi->use_fast_sge;
2011         io_log->result = sc_cmd->result;
2012         io_log->jiffies = jiffies;
2013         io_log->blk_req_cpu = smp_processor_id();
2014
2015         if (direction == QEDI_IO_TRACE_REQ) {
2016                 /* For requests we only care about the submission CPU */
2017                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2018                 io_log->intr_cpu = 0;
2019                 io_log->blk_rsp_cpu = 0;
2020         } else if (direction == QEDI_IO_TRACE_RSP) {
2021                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2022                 io_log->intr_cpu = qedi->intr_cpu;
2023                 io_log->blk_rsp_cpu = smp_processor_id();
2024         }
2025
2026         qedi->io_trace_idx++;
2027         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2028                 qedi->io_trace_idx = 0;
2029
2030         qedi->use_cached_sge = false;
2031         qedi->use_slow_sge = false;
2032         qedi->use_fast_sge = false;
2033
2034         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2035 }
2036
2037 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2038 {
2039         struct iscsi_conn *conn = task->conn;
2040         struct iscsi_session *session = conn->session;
2041         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2042         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2043         struct qedi_conn *qedi_conn = conn->dd_data;
2044         struct qedi_cmd *cmd = task->dd_data;
2045         struct scsi_cmnd *sc = task->sc;
2046         struct iscsi_cmd_hdr cmd_pdu_header;
2047         struct scsi_sgl_task_params tx_sgl_task_params;
2048         struct scsi_sgl_task_params rx_sgl_task_params;
2049         struct scsi_sgl_task_params *prx_sgl = NULL;
2050         struct scsi_sgl_task_params *ptx_sgl = NULL;
2051         struct iscsi_task_params task_params;
2052         struct iscsi_conn_params conn_params;
2053         struct scsi_initiator_cmd_params cmd_params;
2054         struct e4_iscsi_task_context *fw_task_ctx;
2055         struct iscsi_cls_conn *cls_conn;
2056         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2057         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2058         struct qedi_endpoint *ep;
2059         u32 scsi_lun[2];
2060         s16 tid = 0;
2061         u16 sq_idx = 0;
2062         u16 cq_idx;
2063         int rval = 0;
2064
2065         ep = qedi_conn->ep;
2066         cls_conn = qedi_conn->cls_conn;
2067         conn = cls_conn->dd_data;
2068
2069         qedi_iscsi_map_sg_list(cmd);
2070         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2071
2072         tid = qedi_get_task_idx(qedi);
2073         if (tid == -1)
2074                 return -ENOMEM;
2075
2076         fw_task_ctx =
2077              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2078                                                                tid);
2079         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2080
2081         cmd->task_id = tid;
2082
2083         memset(&task_params, 0, sizeof(task_params));
2084         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2085         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2086         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2087         memset(&conn_params, 0, sizeof(conn_params));
2088         memset(&cmd_params, 0, sizeof(cmd_params));
2089
2090         cq_idx = smp_processor_id() % qedi->num_queues;
2091         /* Update header info */
2092         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2093                   ISCSI_ATTR_SIMPLE);
2094         if (hdr->cdb[0] != TEST_UNIT_READY) {
2095                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2096                         SET_FIELD(cmd_pdu_header.flags_attr,
2097                                   ISCSI_CMD_HDR_WRITE, 1);
2098                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2099                 } else {
2100                         SET_FIELD(cmd_pdu_header.flags_attr,
2101                                   ISCSI_CMD_HDR_READ, 1);
2102                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2103                 }
2104         }
2105
2106         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2107         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2108
2109         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2110         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2111         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2112         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2113         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2114         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2115         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2116
2117         /* Fill tx AHS and rx buffer */
2118         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2119                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2120                 tx_sgl_task_params.sgl_phys_addr.lo =
2121                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2122                 tx_sgl_task_params.sgl_phys_addr.hi =
2123                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2124                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2125                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2126                 if (cmd->use_slowpath)
2127                         tx_sgl_task_params.small_mid_sge = true;
2128         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2129                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2130                 rx_sgl_task_params.sgl_phys_addr.lo =
2131                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2132                 rx_sgl_task_params.sgl_phys_addr.hi =
2133                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2134                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2135                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2136         }
2137
2138         /* Add conn param */
2139         conn_params.first_burst_length = conn->session->first_burst;
2140         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2141         conn_params.max_burst_length = conn->session->max_burst;
2142         if (conn->session->initial_r2t_en)
2143                 conn_params.initial_r2t = true;
2144         if (conn->session->imm_data_en)
2145                 conn_params.immediate_data = true;
2146
2147         /* Add cmd params */
2148         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2149         cmd_params.sense_data_buffer_phys_addr.hi =
2150                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2151         /* Fill fw input params */
2152         task_params.context = fw_task_ctx;
2153         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2154         task_params.itid = tid;
2155         task_params.cq_rss_number = cq_idx;
2156         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2157                 task_params.tx_io_size = scsi_bufflen(sc);
2158         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2159                 task_params.rx_io_size = scsi_bufflen(sc);
2160
2161         sq_idx = qedi_get_wqe_idx(qedi_conn);
2162         task_params.sqe = &ep->sq[sq_idx];
2163
2164         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2165                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2166                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2167                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2168                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2169                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2170                   (u32)(cmd->io_tbl.sge_tbl_dma),
2171                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2172
2173         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2174
2175         if (task_params.tx_io_size != 0)
2176                 ptx_sgl = &tx_sgl_task_params;
2177         if (task_params.rx_io_size != 0)
2178                 prx_sgl = &rx_sgl_task_params;
2179
2180         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2181                                             &cmd_params, &cmd_pdu_header,
2182                                             ptx_sgl, prx_sgl,
2183                                             NULL);
2184         if (rval)
2185                 return -1;
2186
2187         spin_lock(&qedi_conn->list_lock);
2188         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2189         cmd->io_cmd_in_list = true;
2190         qedi_conn->active_cmd_count++;
2191         spin_unlock(&qedi_conn->list_lock);
2192
2193         qedi_ring_doorbell(qedi_conn);
2194         return 0;
2195 }
2196
2197 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2198 {
2199         struct iscsi_task_params task_params;
2200         struct qedi_endpoint *ep;
2201         struct iscsi_conn *conn = task->conn;
2202         struct qedi_conn *qedi_conn = conn->dd_data;
2203         struct qedi_cmd *cmd = task->dd_data;
2204         u16 sq_idx = 0;
2205         int rval = 0;
2206
2207         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2208                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2209                   cmd->task_id, get_itt(task->itt), task->state,
2210                   cmd->state, qedi_conn->iscsi_conn_id);
2211
2212         memset(&task_params, 0, sizeof(task_params));
2213         ep = qedi_conn->ep;
2214
2215         sq_idx = qedi_get_wqe_idx(qedi_conn);
2216
2217         task_params.sqe = &ep->sq[sq_idx];
2218         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2219         task_params.itid = cmd->task_id;
2220
2221         rval = init_cleanup_task(&task_params);
2222         if (rval)
2223                 return rval;
2224
2225         qedi_ring_doorbell(qedi_conn);
2226         return 0;
2227 }