1 /* 2 * QLogic iSCSI Offload Driver 3 * Copyright (c) 2016 Cavium Inc. 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 10 #include <linux/blkdev.h> 11 #include <scsi/scsi_tcq.h> 12 #include <linux/delay.h> 13 14 #include "qedi.h" 15 #include "qedi_iscsi.h" 16 #include "qedi_gbl.h" 17 #include "qedi_fw_iscsi.h" 18 #include "qedi_fw_scsi.h" 19 20 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, 21 struct iscsi_task *mtask); 22 23 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd) 24 { 25 struct scsi_cmnd *sc = cmd->scsi_cmd; 26 27 if (cmd->io_tbl.sge_valid && sc) { 28 cmd->io_tbl.sge_valid = 0; 29 scsi_dma_unmap(sc); 30 } 31 } 32 33 static void qedi_process_logout_resp(struct qedi_ctx *qedi, 34 union iscsi_cqe *cqe, 35 struct iscsi_task *task, 36 struct qedi_conn *qedi_conn) 37 { 38 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 39 struct iscsi_logout_rsp *resp_hdr; 40 struct iscsi_session *session = conn->session; 41 struct iscsi_logout_response_hdr *cqe_logout_response; 42 struct qedi_cmd *cmd; 43 44 cmd = (struct qedi_cmd *)task->dd_data; 45 cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response; 46 spin_lock(&session->back_lock); 47 resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr; 48 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 49 resp_hdr->opcode = cqe_logout_response->opcode; 50 resp_hdr->flags = cqe_logout_response->flags; 51 resp_hdr->hlength = 0; 52 53 resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age); 54 resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn); 55 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn); 56 resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn); 57 58 resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait); 59 resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain); 60 61 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 62 "Freeing tid=0x%x for cid=0x%x\n", 63 cmd->task_id, qedi_conn->iscsi_conn_id); 64 65 if (likely(cmd->io_cmd_in_list)) { 66 cmd->io_cmd_in_list = false; 67 list_del_init(&cmd->io_cmd); 68 qedi_conn->active_cmd_count--; 69 } else { 70 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 71 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n", 72 cmd->task_id, qedi_conn->iscsi_conn_id, 73 &cmd->io_cmd); 74 } 75 76 cmd->state = RESPONSE_RECEIVED; 77 qedi_clear_task_idx(qedi, cmd->task_id); 78 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0); 79 80 spin_unlock(&session->back_lock); 81 } 82 83 static void qedi_process_text_resp(struct qedi_ctx *qedi, 84 union iscsi_cqe *cqe, 85 struct iscsi_task *task, 86 struct qedi_conn *qedi_conn) 87 { 88 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 89 struct iscsi_session *session = conn->session; 90 struct e4_iscsi_task_context *task_ctx; 91 struct iscsi_text_rsp *resp_hdr_ptr; 92 struct iscsi_text_response_hdr *cqe_text_response; 93 struct qedi_cmd *cmd; 94 int pld_len; 95 96 cmd = (struct qedi_cmd *)task->dd_data; 97 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id); 98 99 cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response; 100 spin_lock(&session->back_lock); 101 resp_hdr_ptr = (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr; 102 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr)); 103 resp_hdr_ptr->opcode = cqe_text_response->opcode; 104 resp_hdr_ptr->flags = cqe_text_response->flags; 105 resp_hdr_ptr->hlength = 0; 106 107 hton24(resp_hdr_ptr->dlength, 108 (cqe_text_response->hdr_second_dword & 109 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK)); 110 111 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid, 112 conn->session->age); 113 resp_hdr_ptr->ttt = cqe_text_response->ttt; 114 resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn); 115 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn); 116 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn); 117 118 pld_len = cqe_text_response->hdr_second_dword & 119 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK; 120 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len; 121 122 memset(task_ctx, '\0', sizeof(*task_ctx)); 123 124 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 125 "Freeing tid=0x%x for cid=0x%x\n", 126 cmd->task_id, qedi_conn->iscsi_conn_id); 127 128 if (likely(cmd->io_cmd_in_list)) { 129 cmd->io_cmd_in_list = false; 130 list_del_init(&cmd->io_cmd); 131 qedi_conn->active_cmd_count--; 132 } else { 133 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 134 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n", 135 cmd->task_id, qedi_conn->iscsi_conn_id, 136 &cmd->io_cmd); 137 } 138 139 cmd->state = RESPONSE_RECEIVED; 140 qedi_clear_task_idx(qedi, cmd->task_id); 141 142 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, 143 qedi_conn->gen_pdu.resp_buf, 144 (qedi_conn->gen_pdu.resp_wr_ptr - 145 qedi_conn->gen_pdu.resp_buf)); 146 spin_unlock(&session->back_lock); 147 } 148 149 static void qedi_tmf_resp_work(struct work_struct *work) 150 { 151 struct qedi_cmd *qedi_cmd = 152 container_of(work, struct qedi_cmd, tmf_work); 153 struct qedi_conn *qedi_conn = qedi_cmd->conn; 154 struct qedi_ctx *qedi = qedi_conn->qedi; 155 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 156 struct iscsi_session *session = conn->session; 157 struct iscsi_tm_rsp *resp_hdr_ptr; 158 int rval = 0; 159 160 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 161 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf; 162 163 iscsi_block_session(session->cls_session); 164 rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true); 165 if (rval) { 166 qedi_clear_task_idx(qedi, qedi_cmd->task_id); 167 iscsi_unblock_session(session->cls_session); 168 goto exit_tmf_resp; 169 } 170 171 iscsi_unblock_session(session->cls_session); 172 qedi_clear_task_idx(qedi, qedi_cmd->task_id); 173 174 spin_lock(&session->back_lock); 175 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0); 176 spin_unlock(&session->back_lock); 177 178 exit_tmf_resp: 179 kfree(resp_hdr_ptr); 180 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 181 } 182 183 static void qedi_process_tmf_resp(struct qedi_ctx *qedi, 184 union iscsi_cqe *cqe, 185 struct iscsi_task *task, 186 struct qedi_conn *qedi_conn) 187 188 { 189 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 190 struct iscsi_session *session = conn->session; 191 struct iscsi_tmf_response_hdr *cqe_tmp_response; 192 struct iscsi_tm_rsp *resp_hdr_ptr; 193 struct iscsi_tm *tmf_hdr; 194 struct qedi_cmd *qedi_cmd = NULL; 195 196 cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response; 197 198 qedi_cmd = task->dd_data; 199 qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC); 200 if (!qedi_cmd->tmf_resp_buf) { 201 QEDI_ERR(&qedi->dbg_ctx, 202 "Failed to allocate resp buf, cid=0x%x\n", 203 qedi_conn->iscsi_conn_id); 204 return; 205 } 206 207 spin_lock(&session->back_lock); 208 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf; 209 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp)); 210 211 /* Fill up the header */ 212 resp_hdr_ptr->opcode = cqe_tmp_response->opcode; 213 resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags; 214 resp_hdr_ptr->response = cqe_tmp_response->hdr_response; 215 resp_hdr_ptr->hlength = 0; 216 217 hton24(resp_hdr_ptr->dlength, 218 (cqe_tmp_response->hdr_second_dword & 219 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK)); 220 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid, 221 conn->session->age); 222 resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn); 223 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_tmp_response->exp_cmd_sn); 224 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn); 225 226 tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr; 227 228 if (likely(qedi_cmd->io_cmd_in_list)) { 229 qedi_cmd->io_cmd_in_list = false; 230 list_del_init(&qedi_cmd->io_cmd); 231 qedi_conn->active_cmd_count--; 232 } 233 234 if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 235 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) || 236 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 237 ISCSI_TM_FUNC_TARGET_WARM_RESET) || 238 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 239 ISCSI_TM_FUNC_TARGET_COLD_RESET)) { 240 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work); 241 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work); 242 goto unblock_sess; 243 } 244 245 qedi_clear_task_idx(qedi, qedi_cmd->task_id); 246 247 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0); 248 kfree(resp_hdr_ptr); 249 250 unblock_sess: 251 spin_unlock(&session->back_lock); 252 } 253 254 static void qedi_process_login_resp(struct qedi_ctx *qedi, 255 union iscsi_cqe *cqe, 256 struct iscsi_task *task, 257 struct qedi_conn *qedi_conn) 258 { 259 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 260 struct iscsi_session *session = conn->session; 261 struct e4_iscsi_task_context *task_ctx; 262 struct iscsi_login_rsp *resp_hdr_ptr; 263 struct iscsi_login_response_hdr *cqe_login_response; 264 struct qedi_cmd *cmd; 265 int pld_len; 266 267 cmd = (struct qedi_cmd *)task->dd_data; 268 269 cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response; 270 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id); 271 272 spin_lock(&session->back_lock); 273 resp_hdr_ptr = (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr; 274 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp)); 275 resp_hdr_ptr->opcode = cqe_login_response->opcode; 276 resp_hdr_ptr->flags = cqe_login_response->flags_attr; 277 resp_hdr_ptr->hlength = 0; 278 279 hton24(resp_hdr_ptr->dlength, 280 (cqe_login_response->hdr_second_dword & 281 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK)); 282 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid, 283 conn->session->age); 284 resp_hdr_ptr->tsih = cqe_login_response->tsih; 285 resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn); 286 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn); 287 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn); 288 resp_hdr_ptr->status_class = cqe_login_response->status_class; 289 resp_hdr_ptr->status_detail = cqe_login_response->status_detail; 290 pld_len = cqe_login_response->hdr_second_dword & 291 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK; 292 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len; 293 294 if (likely(cmd->io_cmd_in_list)) { 295 cmd->io_cmd_in_list = false; 296 list_del_init(&cmd->io_cmd); 297 qedi_conn->active_cmd_count--; 298 } 299 300 memset(task_ctx, '\0', sizeof(*task_ctx)); 301 302 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, 303 qedi_conn->gen_pdu.resp_buf, 304 (qedi_conn->gen_pdu.resp_wr_ptr - 305 qedi_conn->gen_pdu.resp_buf)); 306 307 spin_unlock(&session->back_lock); 308 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 309 "Freeing tid=0x%x for cid=0x%x\n", 310 cmd->task_id, qedi_conn->iscsi_conn_id); 311 cmd->state = RESPONSE_RECEIVED; 312 qedi_clear_task_idx(qedi, cmd->task_id); 313 } 314 315 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi, 316 struct iscsi_cqe_unsolicited *cqe, 317 char *ptr, int len) 318 { 319 u16 idx = 0; 320 321 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 322 "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n", 323 len, qedi->bdq_prod_idx, 324 (qedi->bdq_prod_idx % qedi->rq_num_entries)); 325 326 /* Obtain buffer address from rqe_opaque */ 327 idx = cqe->rqe_opaque; 328 if (idx > (QEDI_BDQ_NUM - 1)) { 329 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 330 "wrong idx %d returned by FW, dropping the unsolicited pkt\n", 331 idx); 332 return; 333 } 334 335 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 336 "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx); 337 338 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 339 "unsol_cqe_type = %d\n", cqe->unsol_cqe_type); 340 switch (cqe->unsol_cqe_type) { 341 case ISCSI_CQE_UNSOLICITED_SINGLE: 342 case ISCSI_CQE_UNSOLICITED_FIRST: 343 if (len) 344 memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len); 345 break; 346 case ISCSI_CQE_UNSOLICITED_MIDDLE: 347 case ISCSI_CQE_UNSOLICITED_LAST: 348 break; 349 default: 350 break; 351 } 352 } 353 354 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi, 355 struct iscsi_cqe_unsolicited *cqe, 356 int count) 357 { 358 u16 tmp; 359 u16 idx = 0; 360 struct scsi_bd *pbl; 361 362 /* Obtain buffer address from rqe_opaque */ 363 idx = cqe->rqe_opaque; 364 if (idx > (QEDI_BDQ_NUM - 1)) { 365 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 366 "wrong idx %d returned by FW, dropping the unsolicited pkt\n", 367 idx); 368 return; 369 } 370 371 pbl = (struct scsi_bd *)qedi->bdq_pbl; 372 pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries); 373 pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma)); 374 pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma)); 375 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 376 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n", 377 pbl, pbl->address.hi, pbl->address.lo, idx); 378 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0; 379 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0; 380 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0; 381 pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx); 382 383 /* Increment producer to let f/w know we've handled the frame */ 384 qedi->bdq_prod_idx += count; 385 386 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod); 387 tmp = readw(qedi->bdq_primary_prod); 388 389 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod); 390 tmp = readw(qedi->bdq_secondary_prod); 391 } 392 393 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi, 394 struct iscsi_cqe_unsolicited *cqe, 395 u32 pdu_len, u32 num_bdqs, 396 char *bdq_data) 397 { 398 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 399 "num_bdqs [%d]\n", num_bdqs); 400 401 qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len); 402 qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1)); 403 } 404 405 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi, 406 union iscsi_cqe *cqe, 407 struct iscsi_task *task, 408 struct qedi_conn *qedi_conn, u16 que_idx) 409 { 410 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 411 struct iscsi_session *session = conn->session; 412 struct iscsi_nop_in_hdr *cqe_nop_in; 413 struct iscsi_nopin *hdr; 414 struct qedi_cmd *cmd; 415 int tgt_async_nop = 0; 416 u32 lun[2]; 417 u32 pdu_len, num_bdqs; 418 char bdq_data[QEDI_BDQ_BUF_SIZE]; 419 unsigned long flags; 420 421 spin_lock_bh(&session->back_lock); 422 cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in; 423 424 pdu_len = cqe_nop_in->hdr_second_dword & 425 ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK; 426 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE; 427 428 hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr; 429 memset(hdr, 0, sizeof(struct iscsi_hdr)); 430 hdr->opcode = cqe_nop_in->opcode; 431 hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn); 432 hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn); 433 hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn); 434 hdr->ttt = cpu_to_be32(cqe_nop_in->ttt); 435 436 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) { 437 spin_lock_irqsave(&qedi->hba_lock, flags); 438 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited, 439 pdu_len, num_bdqs, bdq_data); 440 hdr->itt = RESERVED_ITT; 441 tgt_async_nop = 1; 442 spin_unlock_irqrestore(&qedi->hba_lock, flags); 443 goto done; 444 } 445 446 /* Response to one of our nop-outs */ 447 if (task) { 448 cmd = task->dd_data; 449 hdr->flags = ISCSI_FLAG_CMD_FINAL; 450 hdr->itt = build_itt(cqe->cqe_solicited.itid, 451 conn->session->age); 452 lun[0] = 0xffffffff; 453 lun[1] = 0xffffffff; 454 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun)); 455 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 456 "Freeing tid=0x%x for cid=0x%x\n", 457 cmd->task_id, qedi_conn->iscsi_conn_id); 458 cmd->state = RESPONSE_RECEIVED; 459 spin_lock(&qedi_conn->list_lock); 460 if (likely(cmd->io_cmd_in_list)) { 461 cmd->io_cmd_in_list = false; 462 list_del_init(&cmd->io_cmd); 463 qedi_conn->active_cmd_count--; 464 } 465 466 spin_unlock(&qedi_conn->list_lock); 467 qedi_clear_task_idx(qedi, cmd->task_id); 468 } 469 470 done: 471 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len); 472 473 spin_unlock_bh(&session->back_lock); 474 return tgt_async_nop; 475 } 476 477 static void qedi_process_async_mesg(struct qedi_ctx *qedi, 478 union iscsi_cqe *cqe, 479 struct iscsi_task *task, 480 struct qedi_conn *qedi_conn, 481 u16 que_idx) 482 { 483 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 484 struct iscsi_session *session = conn->session; 485 struct iscsi_async_msg_hdr *cqe_async_msg; 486 struct iscsi_async *resp_hdr; 487 u32 lun[2]; 488 u32 pdu_len, num_bdqs; 489 char bdq_data[QEDI_BDQ_BUF_SIZE]; 490 unsigned long flags; 491 492 spin_lock_bh(&session->back_lock); 493 494 cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg; 495 pdu_len = cqe_async_msg->hdr_second_dword & 496 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK; 497 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE; 498 499 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) { 500 spin_lock_irqsave(&qedi->hba_lock, flags); 501 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited, 502 pdu_len, num_bdqs, bdq_data); 503 spin_unlock_irqrestore(&qedi->hba_lock, flags); 504 } 505 506 resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr; 507 memset(resp_hdr, 0, sizeof(struct iscsi_hdr)); 508 resp_hdr->opcode = cqe_async_msg->opcode; 509 resp_hdr->flags = 0x80; 510 511 lun[0] = cpu_to_be32(cqe_async_msg->lun.lo); 512 lun[1] = cpu_to_be32(cqe_async_msg->lun.hi); 513 memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun)); 514 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn); 515 resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn); 516 resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn); 517 518 resp_hdr->async_event = cqe_async_msg->async_event; 519 resp_hdr->async_vcode = cqe_async_msg->async_vcode; 520 521 resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv); 522 resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv); 523 resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv); 524 525 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data, 526 pdu_len); 527 528 spin_unlock_bh(&session->back_lock); 529 } 530 531 static void qedi_process_reject_mesg(struct qedi_ctx *qedi, 532 union iscsi_cqe *cqe, 533 struct iscsi_task *task, 534 struct qedi_conn *qedi_conn, 535 uint16_t que_idx) 536 { 537 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 538 struct iscsi_session *session = conn->session; 539 struct iscsi_reject_hdr *cqe_reject; 540 struct iscsi_reject *hdr; 541 u32 pld_len, num_bdqs; 542 unsigned long flags; 543 544 spin_lock_bh(&session->back_lock); 545 cqe_reject = &cqe->cqe_common.iscsi_hdr.reject; 546 pld_len = cqe_reject->hdr_second_dword & 547 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK; 548 num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE; 549 550 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) { 551 spin_lock_irqsave(&qedi->hba_lock, flags); 552 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited, 553 pld_len, num_bdqs, conn->data); 554 spin_unlock_irqrestore(&qedi->hba_lock, flags); 555 } 556 hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr; 557 memset(hdr, 0, sizeof(struct iscsi_hdr)); 558 hdr->opcode = cqe_reject->opcode; 559 hdr->reason = cqe_reject->hdr_reason; 560 hdr->flags = cqe_reject->hdr_flags; 561 hton24(hdr->dlength, (cqe_reject->hdr_second_dword & 562 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK)); 563 hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn); 564 hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn); 565 hdr->statsn = cpu_to_be32(cqe_reject->stat_sn); 566 hdr->ffffffff = cpu_to_be32(0xffffffff); 567 568 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 569 conn->data, pld_len); 570 spin_unlock_bh(&session->back_lock); 571 } 572 573 static void qedi_scsi_completion(struct qedi_ctx *qedi, 574 union iscsi_cqe *cqe, 575 struct iscsi_task *task, 576 struct iscsi_conn *conn) 577 { 578 struct scsi_cmnd *sc_cmd; 579 struct qedi_cmd *cmd = task->dd_data; 580 struct iscsi_session *session = conn->session; 581 struct iscsi_scsi_rsp *hdr; 582 struct iscsi_data_in_hdr *cqe_data_in; 583 int datalen = 0; 584 struct qedi_conn *qedi_conn; 585 u32 iscsi_cid; 586 u8 cqe_err_bits = 0; 587 588 iscsi_cid = cqe->cqe_common.conn_id; 589 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid]; 590 591 cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in; 592 cqe_err_bits = 593 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits; 594 595 spin_lock_bh(&session->back_lock); 596 /* get the scsi command */ 597 sc_cmd = cmd->scsi_cmd; 598 599 if (!sc_cmd) { 600 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n"); 601 goto error; 602 } 603 604 if (!sc_cmd->SCp.ptr) { 605 QEDI_WARN(&qedi->dbg_ctx, 606 "SCp.ptr is NULL, returned in another context.\n"); 607 goto error; 608 } 609 610 if (!sc_cmd->request) { 611 QEDI_WARN(&qedi->dbg_ctx, 612 "sc_cmd->request is NULL, sc_cmd=%p.\n", 613 sc_cmd); 614 goto error; 615 } 616 617 if (!sc_cmd->request->q) { 618 QEDI_WARN(&qedi->dbg_ctx, 619 "request->q is NULL so request is not valid, sc_cmd=%p.\n", 620 sc_cmd); 621 goto error; 622 } 623 624 qedi_iscsi_unmap_sg_list(cmd); 625 626 hdr = (struct iscsi_scsi_rsp *)task->hdr; 627 hdr->opcode = cqe_data_in->opcode; 628 hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn); 629 hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn); 630 hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age); 631 hdr->response = cqe_data_in->reserved1; 632 hdr->cmd_status = cqe_data_in->status_rsvd; 633 hdr->flags = cqe_data_in->flags; 634 hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count); 635 636 if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) { 637 datalen = cqe_data_in->reserved2 & 638 ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK; 639 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen); 640 } 641 642 /* If f/w reports data underrun err then set residual to IO transfer 643 * length, set Underrun flag and clear Overrun flag explicitly 644 */ 645 if (unlikely(cqe_err_bits && 646 GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) { 647 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 648 "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n", 649 hdr->itt, cqe_data_in->flags, cmd->task_id, 650 qedi_conn->iscsi_conn_id, hdr->residual_count, 651 scsi_bufflen(sc_cmd)); 652 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd)); 653 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW; 654 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW); 655 } 656 657 spin_lock(&qedi_conn->list_lock); 658 if (likely(cmd->io_cmd_in_list)) { 659 cmd->io_cmd_in_list = false; 660 list_del_init(&cmd->io_cmd); 661 qedi_conn->active_cmd_count--; 662 } 663 spin_unlock(&qedi_conn->list_lock); 664 665 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 666 "Freeing tid=0x%x for cid=0x%x\n", 667 cmd->task_id, qedi_conn->iscsi_conn_id); 668 cmd->state = RESPONSE_RECEIVED; 669 if (qedi_io_tracing) 670 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP); 671 672 qedi_clear_task_idx(qedi, cmd->task_id); 673 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, 674 conn->data, datalen); 675 error: 676 spin_unlock_bh(&session->back_lock); 677 } 678 679 static void qedi_mtask_completion(struct qedi_ctx *qedi, 680 union iscsi_cqe *cqe, 681 struct iscsi_task *task, 682 struct qedi_conn *conn, uint16_t que_idx) 683 { 684 struct iscsi_conn *iscsi_conn; 685 u32 hdr_opcode; 686 687 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte; 688 iscsi_conn = conn->cls_conn->dd_data; 689 690 switch (hdr_opcode) { 691 case ISCSI_OPCODE_SCSI_RESPONSE: 692 case ISCSI_OPCODE_DATA_IN: 693 qedi_scsi_completion(qedi, cqe, task, iscsi_conn); 694 break; 695 case ISCSI_OPCODE_LOGIN_RESPONSE: 696 qedi_process_login_resp(qedi, cqe, task, conn); 697 break; 698 case ISCSI_OPCODE_TMF_RESPONSE: 699 qedi_process_tmf_resp(qedi, cqe, task, conn); 700 break; 701 case ISCSI_OPCODE_TEXT_RESPONSE: 702 qedi_process_text_resp(qedi, cqe, task, conn); 703 break; 704 case ISCSI_OPCODE_LOGOUT_RESPONSE: 705 qedi_process_logout_resp(qedi, cqe, task, conn); 706 break; 707 case ISCSI_OPCODE_NOP_IN: 708 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx); 709 break; 710 default: 711 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n"); 712 } 713 } 714 715 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi, 716 struct iscsi_cqe_solicited *cqe, 717 struct iscsi_task *task, 718 struct qedi_conn *qedi_conn) 719 { 720 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 721 struct iscsi_session *session = conn->session; 722 struct qedi_cmd *cmd = task->dd_data; 723 724 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL, 725 "itid=0x%x, cmd task id=0x%x\n", 726 cqe->itid, cmd->task_id); 727 728 cmd->state = RESPONSE_RECEIVED; 729 qedi_clear_task_idx(qedi, cmd->task_id); 730 731 spin_lock_bh(&session->back_lock); 732 __iscsi_put_task(task); 733 spin_unlock_bh(&session->back_lock); 734 } 735 736 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi, 737 struct iscsi_cqe_solicited *cqe, 738 struct iscsi_task *task, 739 struct iscsi_conn *conn) 740 { 741 struct qedi_work_map *work, *work_tmp; 742 u32 proto_itt = cqe->itid; 743 u32 ptmp_itt = 0; 744 itt_t protoitt = 0; 745 int found = 0; 746 struct qedi_cmd *qedi_cmd = NULL; 747 u32 rtid = 0; 748 u32 iscsi_cid; 749 struct qedi_conn *qedi_conn; 750 struct qedi_cmd *dbg_cmd; 751 struct iscsi_task *mtask; 752 struct iscsi_tm *tmf_hdr = NULL; 753 754 iscsi_cid = cqe->conn_id; 755 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid]; 756 if (!qedi_conn) { 757 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 758 "icid not found 0x%x\n", cqe->conn_id); 759 return; 760 } 761 762 /* Based on this itt get the corresponding qedi_cmd */ 763 spin_lock_bh(&qedi_conn->tmf_work_lock); 764 list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list, 765 list) { 766 if (work->rtid == proto_itt) { 767 /* We found the command */ 768 qedi_cmd = work->qedi_cmd; 769 if (!qedi_cmd->list_tmf_work) { 770 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 771 "TMF work not found, cqe->tid=0x%x, cid=0x%x\n", 772 proto_itt, qedi_conn->iscsi_conn_id); 773 WARN_ON(1); 774 } 775 found = 1; 776 mtask = qedi_cmd->task; 777 tmf_hdr = (struct iscsi_tm *)mtask->hdr; 778 rtid = work->rtid; 779 780 list_del_init(&work->list); 781 kfree(work); 782 qedi_cmd->list_tmf_work = NULL; 783 } 784 } 785 spin_unlock_bh(&qedi_conn->tmf_work_lock); 786 787 if (found) { 788 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 789 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n", 790 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id); 791 792 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 793 ISCSI_TM_FUNC_ABORT_TASK) { 794 spin_lock_bh(&conn->session->back_lock); 795 796 protoitt = build_itt(get_itt(tmf_hdr->rtt), 797 conn->session->age); 798 task = iscsi_itt_to_task(conn, protoitt); 799 800 spin_unlock_bh(&conn->session->back_lock); 801 802 if (!task) { 803 QEDI_NOTICE(&qedi->dbg_ctx, 804 "IO task completed, tmf rtt=0x%x, cid=0x%x\n", 805 get_itt(tmf_hdr->rtt), 806 qedi_conn->iscsi_conn_id); 807 return; 808 } 809 810 dbg_cmd = task->dd_data; 811 812 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 813 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n", 814 get_itt(tmf_hdr->rtt), get_itt(task->itt), 815 dbg_cmd->task_id, qedi_conn->iscsi_conn_id); 816 817 if (qedi_cmd->state == CLEANUP_WAIT_FAILED) 818 qedi_cmd->state = CLEANUP_RECV; 819 820 qedi_clear_task_idx(qedi_conn->qedi, rtid); 821 822 spin_lock(&qedi_conn->list_lock); 823 list_del_init(&dbg_cmd->io_cmd); 824 qedi_conn->active_cmd_count--; 825 spin_unlock(&qedi_conn->list_lock); 826 qedi_cmd->state = CLEANUP_RECV; 827 wake_up_interruptible(&qedi_conn->wait_queue); 828 } 829 } else if (qedi_conn->cmd_cleanup_req > 0) { 830 spin_lock_bh(&conn->session->back_lock); 831 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt); 832 protoitt = build_itt(ptmp_itt, conn->session->age); 833 task = iscsi_itt_to_task(conn, protoitt); 834 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 835 "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n", 836 cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl, 837 qedi_conn->iscsi_conn_id); 838 839 spin_unlock_bh(&conn->session->back_lock); 840 if (!task) { 841 QEDI_NOTICE(&qedi->dbg_ctx, 842 "task is null, itid=0x%x, cid=0x%x\n", 843 cqe->itid, qedi_conn->iscsi_conn_id); 844 return; 845 } 846 qedi_conn->cmd_cleanup_cmpl++; 847 wake_up(&qedi_conn->wait_queue); 848 849 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID, 850 "Freeing tid=0x%x for cid=0x%x\n", 851 cqe->itid, qedi_conn->iscsi_conn_id); 852 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid); 853 854 } else { 855 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt); 856 protoitt = build_itt(ptmp_itt, conn->session->age); 857 task = iscsi_itt_to_task(conn, protoitt); 858 QEDI_ERR(&qedi->dbg_ctx, 859 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n", 860 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task); 861 } 862 } 863 864 void qedi_fp_process_cqes(struct qedi_work *work) 865 { 866 struct qedi_ctx *qedi = work->qedi; 867 union iscsi_cqe *cqe = &work->cqe; 868 struct iscsi_task *task = NULL; 869 struct iscsi_nopout *nopout_hdr; 870 struct qedi_conn *q_conn; 871 struct iscsi_conn *conn; 872 struct qedi_cmd *qedi_cmd; 873 u32 comp_type; 874 u32 iscsi_cid; 875 u32 hdr_opcode; 876 u16 que_idx = work->que_idx; 877 u8 cqe_err_bits = 0; 878 879 comp_type = cqe->cqe_common.cqe_type; 880 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte; 881 cqe_err_bits = 882 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits; 883 884 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, 885 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n", 886 cqe->cqe_common.conn_id, comp_type, hdr_opcode); 887 888 if (comp_type >= MAX_ISCSI_CQES_TYPE) { 889 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n"); 890 return; 891 } 892 893 iscsi_cid = cqe->cqe_common.conn_id; 894 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid]; 895 if (!q_conn) { 896 QEDI_WARN(&qedi->dbg_ctx, 897 "Session no longer exists for cid=0x%x!!\n", 898 iscsi_cid); 899 return; 900 } 901 902 conn = q_conn->cls_conn->dd_data; 903 904 if (unlikely(cqe_err_bits && 905 GET_FIELD(cqe_err_bits, 906 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) { 907 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST); 908 return; 909 } 910 911 switch (comp_type) { 912 case ISCSI_CQE_TYPE_SOLICITED: 913 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE: 914 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work); 915 task = qedi_cmd->task; 916 if (!task) { 917 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n"); 918 return; 919 } 920 921 /* Process NOPIN local completion */ 922 nopout_hdr = (struct iscsi_nopout *)task->hdr; 923 if ((nopout_hdr->itt == RESERVED_ITT) && 924 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) { 925 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited, 926 task, q_conn); 927 } else { 928 cqe->cqe_solicited.itid = 929 qedi_get_itt(cqe->cqe_solicited); 930 /* Process other solicited responses */ 931 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx); 932 } 933 break; 934 case ISCSI_CQE_TYPE_UNSOLICITED: 935 switch (hdr_opcode) { 936 case ISCSI_OPCODE_NOP_IN: 937 qedi_process_nopin_mesg(qedi, cqe, task, q_conn, 938 que_idx); 939 break; 940 case ISCSI_OPCODE_ASYNC_MSG: 941 qedi_process_async_mesg(qedi, cqe, task, q_conn, 942 que_idx); 943 break; 944 case ISCSI_OPCODE_REJECT: 945 qedi_process_reject_mesg(qedi, cqe, task, q_conn, 946 que_idx); 947 break; 948 } 949 goto exit_fp_process; 950 case ISCSI_CQE_TYPE_DUMMY: 951 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n"); 952 goto exit_fp_process; 953 case ISCSI_CQE_TYPE_TASK_CLEANUP: 954 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n"); 955 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task, 956 conn); 957 goto exit_fp_process; 958 default: 959 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n"); 960 break; 961 } 962 963 exit_fp_process: 964 return; 965 } 966 967 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn) 968 { 969 struct iscsi_db_data dbell = { 0 }; 970 971 dbell.agg_flags = 0; 972 973 dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT; 974 dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT; 975 dbell.params |= 976 DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT; 977 978 dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx; 979 writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell); 980 981 /* Make sure fw write idx is coherent, and include both memory barriers 982 * as a failsafe as for some architectures the call is the same but on 983 * others they are two different assembly operations. 984 */ 985 wmb(); 986 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ, 987 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n", 988 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx, 989 qedi_conn->iscsi_conn_id); 990 } 991 992 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn) 993 { 994 struct qedi_endpoint *ep; 995 u16 rval; 996 997 ep = qedi_conn->ep; 998 rval = ep->sq_prod_idx; 999 1000 /* Increament SQ index */ 1001 ep->sq_prod_idx++; 1002 ep->fw_sq_prod_idx++; 1003 if (ep->sq_prod_idx == QEDI_SQ_SIZE) 1004 ep->sq_prod_idx = 0; 1005 1006 return rval; 1007 } 1008 1009 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn, 1010 struct iscsi_task *task) 1011 { 1012 struct iscsi_login_req_hdr login_req_pdu_header; 1013 struct scsi_sgl_task_params tx_sgl_task_params; 1014 struct scsi_sgl_task_params rx_sgl_task_params; 1015 struct iscsi_task_params task_params; 1016 struct e4_iscsi_task_context *fw_task_ctx; 1017 struct qedi_ctx *qedi = qedi_conn->qedi; 1018 struct iscsi_login_req *login_hdr; 1019 struct scsi_sge *resp_sge = NULL; 1020 struct qedi_cmd *qedi_cmd; 1021 struct qedi_endpoint *ep; 1022 s16 tid = 0; 1023 u16 sq_idx = 0; 1024 int rval = 0; 1025 1026 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1027 qedi_cmd = (struct qedi_cmd *)task->dd_data; 1028 ep = qedi_conn->ep; 1029 login_hdr = (struct iscsi_login_req *)task->hdr; 1030 1031 tid = qedi_get_task_idx(qedi); 1032 if (tid == -1) 1033 return -ENOMEM; 1034 1035 fw_task_ctx = 1036 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 1037 tid); 1038 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 1039 1040 qedi_cmd->task_id = tid; 1041 1042 memset(&task_params, 0, sizeof(task_params)); 1043 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header)); 1044 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params)); 1045 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params)); 1046 /* Update header info */ 1047 login_req_pdu_header.opcode = login_hdr->opcode; 1048 login_req_pdu_header.version_min = login_hdr->min_version; 1049 login_req_pdu_header.version_max = login_hdr->max_version; 1050 login_req_pdu_header.flags_attr = login_hdr->flags; 1051 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid); 1052 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]); 1053 1054 login_req_pdu_header.tsih = login_hdr->tsih; 1055 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength); 1056 1057 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd); 1058 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt)); 1059 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id; 1060 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn); 1061 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn); 1062 login_req_pdu_header.exp_stat_sn = 0; 1063 1064 /* Fill tx AHS and rx buffer */ 1065 tx_sgl_task_params.sgl = 1066 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 1067 tx_sgl_task_params.sgl_phys_addr.lo = 1068 (u32)(qedi_conn->gen_pdu.req_dma_addr); 1069 tx_sgl_task_params.sgl_phys_addr.hi = 1070 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 1071 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength); 1072 tx_sgl_task_params.num_sges = 1; 1073 1074 rx_sgl_task_params.sgl = 1075 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1076 rx_sgl_task_params.sgl_phys_addr.lo = 1077 (u32)(qedi_conn->gen_pdu.resp_dma_addr); 1078 rx_sgl_task_params.sgl_phys_addr.hi = 1079 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 1080 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len; 1081 rx_sgl_task_params.num_sges = 1; 1082 1083 /* Fill fw input params */ 1084 task_params.context = fw_task_ctx; 1085 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 1086 task_params.itid = tid; 1087 task_params.cq_rss_number = 0; 1088 task_params.tx_io_size = ntoh24(login_hdr->dlength); 1089 task_params.rx_io_size = resp_sge->sge_len; 1090 1091 sq_idx = qedi_get_wqe_idx(qedi_conn); 1092 task_params.sqe = &ep->sq[sq_idx]; 1093 1094 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 1095 rval = init_initiator_login_request_task(&task_params, 1096 &login_req_pdu_header, 1097 &tx_sgl_task_params, 1098 &rx_sgl_task_params); 1099 if (rval) 1100 return -1; 1101 1102 spin_lock(&qedi_conn->list_lock); 1103 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list); 1104 qedi_cmd->io_cmd_in_list = true; 1105 qedi_conn->active_cmd_count++; 1106 spin_unlock(&qedi_conn->list_lock); 1107 1108 qedi_ring_doorbell(qedi_conn); 1109 return 0; 1110 } 1111 1112 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn, 1113 struct iscsi_task *task) 1114 { 1115 struct iscsi_logout_req_hdr logout_pdu_header; 1116 struct scsi_sgl_task_params tx_sgl_task_params; 1117 struct scsi_sgl_task_params rx_sgl_task_params; 1118 struct iscsi_task_params task_params; 1119 struct e4_iscsi_task_context *fw_task_ctx; 1120 struct iscsi_logout *logout_hdr = NULL; 1121 struct qedi_ctx *qedi = qedi_conn->qedi; 1122 struct qedi_cmd *qedi_cmd; 1123 struct qedi_endpoint *ep; 1124 s16 tid = 0; 1125 u16 sq_idx = 0; 1126 int rval = 0; 1127 1128 qedi_cmd = (struct qedi_cmd *)task->dd_data; 1129 logout_hdr = (struct iscsi_logout *)task->hdr; 1130 ep = qedi_conn->ep; 1131 1132 tid = qedi_get_task_idx(qedi); 1133 if (tid == -1) 1134 return -ENOMEM; 1135 1136 fw_task_ctx = 1137 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 1138 tid); 1139 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 1140 1141 qedi_cmd->task_id = tid; 1142 1143 memset(&task_params, 0, sizeof(task_params)); 1144 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header)); 1145 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params)); 1146 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params)); 1147 1148 /* Update header info */ 1149 logout_pdu_header.opcode = logout_hdr->opcode; 1150 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags; 1151 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd); 1152 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt)); 1153 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn); 1154 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn); 1155 logout_pdu_header.cid = qedi_conn->iscsi_conn_id; 1156 1157 /* Fill fw input params */ 1158 task_params.context = fw_task_ctx; 1159 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 1160 task_params.itid = tid; 1161 task_params.cq_rss_number = 0; 1162 task_params.tx_io_size = 0; 1163 task_params.rx_io_size = 0; 1164 1165 sq_idx = qedi_get_wqe_idx(qedi_conn); 1166 task_params.sqe = &ep->sq[sq_idx]; 1167 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 1168 1169 rval = init_initiator_logout_request_task(&task_params, 1170 &logout_pdu_header, 1171 NULL, NULL); 1172 if (rval) 1173 return -1; 1174 1175 spin_lock(&qedi_conn->list_lock); 1176 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list); 1177 qedi_cmd->io_cmd_in_list = true; 1178 qedi_conn->active_cmd_count++; 1179 spin_unlock(&qedi_conn->list_lock); 1180 1181 qedi_ring_doorbell(qedi_conn); 1182 return 0; 1183 } 1184 1185 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn, 1186 struct iscsi_task *task, bool in_recovery) 1187 { 1188 int rval; 1189 struct iscsi_task *ctask; 1190 struct qedi_cmd *cmd, *cmd_tmp; 1191 struct iscsi_tm *tmf_hdr; 1192 unsigned int lun = 0; 1193 bool lun_reset = false; 1194 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 1195 struct iscsi_session *session = conn->session; 1196 1197 /* From recovery, task is NULL or from tmf resp valid task */ 1198 if (task) { 1199 tmf_hdr = (struct iscsi_tm *)task->hdr; 1200 1201 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1202 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) { 1203 lun_reset = true; 1204 lun = scsilun_to_int(&tmf_hdr->lun); 1205 } 1206 } 1207 1208 qedi_conn->cmd_cleanup_req = 0; 1209 qedi_conn->cmd_cleanup_cmpl = 0; 1210 1211 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1212 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n", 1213 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id, 1214 in_recovery, lun_reset); 1215 1216 if (lun_reset) 1217 spin_lock_bh(&session->back_lock); 1218 1219 spin_lock(&qedi_conn->list_lock); 1220 1221 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list, 1222 io_cmd) { 1223 ctask = cmd->task; 1224 if (ctask == task) 1225 continue; 1226 1227 if (lun_reset) { 1228 if (cmd->scsi_cmd && cmd->scsi_cmd->device) { 1229 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1230 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n", 1231 cmd->task_id, get_itt(ctask->itt), 1232 cmd->scsi_cmd, cmd->scsi_cmd->device, 1233 ctask->state, cmd->state, 1234 qedi_conn->iscsi_conn_id); 1235 if (cmd->scsi_cmd->device->lun != lun) 1236 continue; 1237 } 1238 } 1239 qedi_conn->cmd_cleanup_req++; 1240 qedi_iscsi_cleanup_task(ctask, true); 1241 1242 list_del_init(&cmd->io_cmd); 1243 qedi_conn->active_cmd_count--; 1244 QEDI_WARN(&qedi->dbg_ctx, 1245 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n", 1246 &cmd->io_cmd, qedi_conn->iscsi_conn_id); 1247 } 1248 1249 spin_unlock(&qedi_conn->list_lock); 1250 1251 if (lun_reset) 1252 spin_unlock_bh(&session->back_lock); 1253 1254 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1255 "cmd_cleanup_req=%d, cid=0x%x\n", 1256 qedi_conn->cmd_cleanup_req, 1257 qedi_conn->iscsi_conn_id); 1258 1259 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue, 1260 ((qedi_conn->cmd_cleanup_req == 1261 qedi_conn->cmd_cleanup_cmpl) || 1262 qedi_conn->ep), 1263 5 * HZ); 1264 if (rval) { 1265 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1266 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n", 1267 qedi_conn->cmd_cleanup_req, 1268 qedi_conn->cmd_cleanup_cmpl, 1269 qedi_conn->iscsi_conn_id); 1270 1271 return 0; 1272 } 1273 1274 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1275 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n", 1276 qedi_conn->cmd_cleanup_req, 1277 qedi_conn->cmd_cleanup_cmpl, 1278 qedi_conn->iscsi_conn_id); 1279 1280 iscsi_host_for_each_session(qedi->shost, 1281 qedi_mark_device_missing); 1282 qedi_ops->common->drain(qedi->cdev); 1283 1284 /* Enable IOs for all other sessions except current.*/ 1285 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue, 1286 (qedi_conn->cmd_cleanup_req == 1287 qedi_conn->cmd_cleanup_cmpl), 1288 5 * HZ)) { 1289 iscsi_host_for_each_session(qedi->shost, 1290 qedi_mark_device_available); 1291 return -1; 1292 } 1293 1294 iscsi_host_for_each_session(qedi->shost, 1295 qedi_mark_device_available); 1296 1297 return 0; 1298 } 1299 1300 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn, 1301 struct iscsi_task *task) 1302 { 1303 struct qedi_endpoint *qedi_ep; 1304 int rval; 1305 1306 qedi_ep = qedi_conn->ep; 1307 qedi_conn->cmd_cleanup_req = 0; 1308 qedi_conn->cmd_cleanup_cmpl = 0; 1309 1310 if (!qedi_ep) { 1311 QEDI_WARN(&qedi->dbg_ctx, 1312 "Cannot proceed, ep already disconnected, cid=0x%x\n", 1313 qedi_conn->iscsi_conn_id); 1314 return; 1315 } 1316 1317 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1318 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n", 1319 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep); 1320 1321 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle); 1322 1323 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true); 1324 if (rval) { 1325 QEDI_ERR(&qedi->dbg_ctx, 1326 "fatal error, need hard reset, cid=0x%x\n", 1327 qedi_conn->iscsi_conn_id); 1328 WARN_ON(1); 1329 } 1330 } 1331 1332 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi, 1333 struct qedi_conn *qedi_conn, 1334 struct iscsi_task *task, 1335 struct qedi_cmd *qedi_cmd, 1336 struct qedi_work_map *list_work) 1337 { 1338 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data; 1339 int wait; 1340 1341 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue, 1342 ((qedi_cmd->state == 1343 CLEANUP_RECV) || 1344 ((qedi_cmd->type == TYPEIO) && 1345 (cmd->state == 1346 RESPONSE_RECEIVED))), 1347 5 * HZ); 1348 if (!wait) { 1349 qedi_cmd->state = CLEANUP_WAIT_FAILED; 1350 1351 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1352 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n", 1353 cmd->task_id, qedi_conn->iscsi_conn_id); 1354 1355 return -1; 1356 } 1357 return 0; 1358 } 1359 1360 static void qedi_tmf_work(struct work_struct *work) 1361 { 1362 struct qedi_cmd *qedi_cmd = 1363 container_of(work, struct qedi_cmd, tmf_work); 1364 struct qedi_conn *qedi_conn = qedi_cmd->conn; 1365 struct qedi_ctx *qedi = qedi_conn->qedi; 1366 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 1367 struct qedi_work_map *list_work = NULL; 1368 struct iscsi_task *mtask; 1369 struct qedi_cmd *cmd; 1370 struct iscsi_task *ctask; 1371 struct iscsi_tm *tmf_hdr; 1372 s16 rval = 0; 1373 s16 tid = 0; 1374 1375 mtask = qedi_cmd->task; 1376 tmf_hdr = (struct iscsi_tm *)mtask->hdr; 1377 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 1378 1379 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt); 1380 if (!ctask || !ctask->sc) { 1381 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n"); 1382 goto abort_ret; 1383 } 1384 1385 cmd = (struct qedi_cmd *)ctask->dd_data; 1386 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1387 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n", 1388 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id, 1389 qedi_conn->iscsi_conn_id); 1390 1391 if (qedi_do_not_recover) { 1392 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n", 1393 qedi_do_not_recover); 1394 goto abort_ret; 1395 } 1396 1397 list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC); 1398 if (!list_work) { 1399 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n"); 1400 goto abort_ret; 1401 } 1402 1403 qedi_cmd->type = TYPEIO; 1404 list_work->qedi_cmd = qedi_cmd; 1405 list_work->rtid = cmd->task_id; 1406 list_work->state = QEDI_WORK_SCHEDULED; 1407 qedi_cmd->list_tmf_work = list_work; 1408 1409 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 1410 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n", 1411 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id, 1412 tmf_hdr->flags); 1413 1414 spin_lock_bh(&qedi_conn->tmf_work_lock); 1415 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list); 1416 spin_unlock_bh(&qedi_conn->tmf_work_lock); 1417 1418 qedi_iscsi_cleanup_task(ctask, false); 1419 1420 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd, 1421 list_work); 1422 if (rval == -1) { 1423 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, 1424 "FW cleanup got escalated, cid=0x%x\n", 1425 qedi_conn->iscsi_conn_id); 1426 goto ldel_exit; 1427 } 1428 1429 tid = qedi_get_task_idx(qedi); 1430 if (tid == -1) { 1431 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n", 1432 qedi_conn->iscsi_conn_id); 1433 goto ldel_exit; 1434 } 1435 1436 qedi_cmd->task_id = tid; 1437 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task); 1438 1439 abort_ret: 1440 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 1441 return; 1442 1443 ldel_exit: 1444 spin_lock_bh(&qedi_conn->tmf_work_lock); 1445 if (!qedi_cmd->list_tmf_work) { 1446 list_del_init(&list_work->list); 1447 qedi_cmd->list_tmf_work = NULL; 1448 kfree(list_work); 1449 } 1450 spin_unlock_bh(&qedi_conn->tmf_work_lock); 1451 1452 spin_lock(&qedi_conn->list_lock); 1453 list_del_init(&cmd->io_cmd); 1454 qedi_conn->active_cmd_count--; 1455 spin_unlock(&qedi_conn->list_lock); 1456 1457 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags); 1458 } 1459 1460 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, 1461 struct iscsi_task *mtask) 1462 { 1463 struct iscsi_tmf_request_hdr tmf_pdu_header; 1464 struct iscsi_task_params task_params; 1465 struct qedi_ctx *qedi = qedi_conn->qedi; 1466 struct e4_iscsi_task_context *fw_task_ctx; 1467 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data; 1468 struct iscsi_task *ctask; 1469 struct iscsi_tm *tmf_hdr; 1470 struct qedi_cmd *qedi_cmd; 1471 struct qedi_cmd *cmd; 1472 struct qedi_endpoint *ep; 1473 u32 scsi_lun[2]; 1474 s16 tid = 0; 1475 u16 sq_idx = 0; 1476 int rval = 0; 1477 1478 tmf_hdr = (struct iscsi_tm *)mtask->hdr; 1479 qedi_cmd = (struct qedi_cmd *)mtask->dd_data; 1480 ep = qedi_conn->ep; 1481 if (!ep) 1482 return -ENODEV; 1483 1484 tid = qedi_get_task_idx(qedi); 1485 if (tid == -1) 1486 return -ENOMEM; 1487 1488 fw_task_ctx = 1489 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 1490 tid); 1491 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 1492 1493 qedi_cmd->task_id = tid; 1494 1495 memset(&task_params, 0, sizeof(task_params)); 1496 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header)); 1497 1498 /* Update header info */ 1499 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd); 1500 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt)); 1501 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn); 1502 1503 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun)); 1504 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]); 1505 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]); 1506 1507 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1508 ISCSI_TM_FUNC_ABORT_TASK) { 1509 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt); 1510 if (!ctask || !ctask->sc) { 1511 QEDI_ERR(&qedi->dbg_ctx, 1512 "Could not get reference task\n"); 1513 return 0; 1514 } 1515 cmd = (struct qedi_cmd *)ctask->dd_data; 1516 tmf_pdu_header.rtt = 1517 qedi_set_itt(cmd->task_id, 1518 get_itt(tmf_hdr->rtt)); 1519 } else { 1520 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG; 1521 } 1522 1523 tmf_pdu_header.opcode = tmf_hdr->opcode; 1524 tmf_pdu_header.function = tmf_hdr->flags; 1525 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength); 1526 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn); 1527 1528 /* Fill fw input params */ 1529 task_params.context = fw_task_ctx; 1530 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 1531 task_params.itid = tid; 1532 task_params.cq_rss_number = 0; 1533 task_params.tx_io_size = 0; 1534 task_params.rx_io_size = 0; 1535 1536 sq_idx = qedi_get_wqe_idx(qedi_conn); 1537 task_params.sqe = &ep->sq[sq_idx]; 1538 1539 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 1540 rval = init_initiator_tmf_request_task(&task_params, 1541 &tmf_pdu_header); 1542 if (rval) 1543 return -1; 1544 1545 spin_lock(&qedi_conn->list_lock); 1546 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list); 1547 qedi_cmd->io_cmd_in_list = true; 1548 qedi_conn->active_cmd_count++; 1549 spin_unlock(&qedi_conn->list_lock); 1550 1551 qedi_ring_doorbell(qedi_conn); 1552 return 0; 1553 } 1554 1555 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn, 1556 struct iscsi_task *mtask) 1557 { 1558 struct qedi_ctx *qedi = qedi_conn->qedi; 1559 struct iscsi_tm *tmf_hdr; 1560 struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data; 1561 s16 tid = 0; 1562 1563 tmf_hdr = (struct iscsi_tm *)mtask->hdr; 1564 qedi_cmd->task = mtask; 1565 1566 /* If abort task then schedule the work and return */ 1567 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1568 ISCSI_TM_FUNC_ABORT_TASK) { 1569 qedi_cmd->state = CLEANUP_WAIT; 1570 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work); 1571 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work); 1572 1573 } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1574 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) || 1575 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1576 ISCSI_TM_FUNC_TARGET_WARM_RESET) || 1577 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) == 1578 ISCSI_TM_FUNC_TARGET_COLD_RESET)) { 1579 tid = qedi_get_task_idx(qedi); 1580 if (tid == -1) { 1581 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n", 1582 qedi_conn->iscsi_conn_id); 1583 return -1; 1584 } 1585 qedi_cmd->task_id = tid; 1586 1587 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task); 1588 1589 } else { 1590 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n", 1591 qedi_conn->iscsi_conn_id); 1592 return -1; 1593 } 1594 1595 return 0; 1596 } 1597 1598 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn, 1599 struct iscsi_task *task) 1600 { 1601 struct iscsi_text_request_hdr text_request_pdu_header; 1602 struct scsi_sgl_task_params tx_sgl_task_params; 1603 struct scsi_sgl_task_params rx_sgl_task_params; 1604 struct iscsi_task_params task_params; 1605 struct e4_iscsi_task_context *fw_task_ctx; 1606 struct qedi_ctx *qedi = qedi_conn->qedi; 1607 struct iscsi_text *text_hdr; 1608 struct scsi_sge *req_sge = NULL; 1609 struct scsi_sge *resp_sge = NULL; 1610 struct qedi_cmd *qedi_cmd; 1611 struct qedi_endpoint *ep; 1612 s16 tid = 0; 1613 u16 sq_idx = 0; 1614 int rval = 0; 1615 1616 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 1617 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1618 qedi_cmd = (struct qedi_cmd *)task->dd_data; 1619 text_hdr = (struct iscsi_text *)task->hdr; 1620 ep = qedi_conn->ep; 1621 1622 tid = qedi_get_task_idx(qedi); 1623 if (tid == -1) 1624 return -ENOMEM; 1625 1626 fw_task_ctx = 1627 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 1628 tid); 1629 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 1630 1631 qedi_cmd->task_id = tid; 1632 1633 memset(&task_params, 0, sizeof(task_params)); 1634 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header)); 1635 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params)); 1636 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params)); 1637 1638 /* Update header info */ 1639 text_request_pdu_header.opcode = text_hdr->opcode; 1640 text_request_pdu_header.flags_attr = text_hdr->flags; 1641 1642 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd); 1643 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt)); 1644 text_request_pdu_header.ttt = text_hdr->ttt; 1645 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn); 1646 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn); 1647 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength); 1648 1649 /* Fill tx AHS and rx buffer */ 1650 tx_sgl_task_params.sgl = 1651 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 1652 tx_sgl_task_params.sgl_phys_addr.lo = 1653 (u32)(qedi_conn->gen_pdu.req_dma_addr); 1654 tx_sgl_task_params.sgl_phys_addr.hi = 1655 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 1656 tx_sgl_task_params.total_buffer_size = req_sge->sge_len; 1657 tx_sgl_task_params.num_sges = 1; 1658 1659 rx_sgl_task_params.sgl = 1660 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1661 rx_sgl_task_params.sgl_phys_addr.lo = 1662 (u32)(qedi_conn->gen_pdu.resp_dma_addr); 1663 rx_sgl_task_params.sgl_phys_addr.hi = 1664 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 1665 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len; 1666 rx_sgl_task_params.num_sges = 1; 1667 1668 /* Fill fw input params */ 1669 task_params.context = fw_task_ctx; 1670 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 1671 task_params.itid = tid; 1672 task_params.cq_rss_number = 0; 1673 task_params.tx_io_size = ntoh24(text_hdr->dlength); 1674 task_params.rx_io_size = resp_sge->sge_len; 1675 1676 sq_idx = qedi_get_wqe_idx(qedi_conn); 1677 task_params.sqe = &ep->sq[sq_idx]; 1678 1679 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 1680 rval = init_initiator_text_request_task(&task_params, 1681 &text_request_pdu_header, 1682 &tx_sgl_task_params, 1683 &rx_sgl_task_params); 1684 if (rval) 1685 return -1; 1686 1687 spin_lock(&qedi_conn->list_lock); 1688 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list); 1689 qedi_cmd->io_cmd_in_list = true; 1690 qedi_conn->active_cmd_count++; 1691 spin_unlock(&qedi_conn->list_lock); 1692 1693 qedi_ring_doorbell(qedi_conn); 1694 return 0; 1695 } 1696 1697 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn, 1698 struct iscsi_task *task, 1699 char *datap, int data_len, int unsol) 1700 { 1701 struct iscsi_nop_out_hdr nop_out_pdu_header; 1702 struct scsi_sgl_task_params tx_sgl_task_params; 1703 struct scsi_sgl_task_params rx_sgl_task_params; 1704 struct iscsi_task_params task_params; 1705 struct qedi_ctx *qedi = qedi_conn->qedi; 1706 struct e4_iscsi_task_context *fw_task_ctx; 1707 struct iscsi_nopout *nopout_hdr; 1708 struct scsi_sge *resp_sge = NULL; 1709 struct qedi_cmd *qedi_cmd; 1710 struct qedi_endpoint *ep; 1711 u32 scsi_lun[2]; 1712 s16 tid = 0; 1713 u16 sq_idx = 0; 1714 int rval = 0; 1715 1716 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1717 qedi_cmd = (struct qedi_cmd *)task->dd_data; 1718 nopout_hdr = (struct iscsi_nopout *)task->hdr; 1719 ep = qedi_conn->ep; 1720 1721 tid = qedi_get_task_idx(qedi); 1722 if (tid == -1) 1723 return -ENOMEM; 1724 1725 fw_task_ctx = 1726 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 1727 tid); 1728 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 1729 1730 qedi_cmd->task_id = tid; 1731 1732 memset(&task_params, 0, sizeof(task_params)); 1733 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header)); 1734 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params)); 1735 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params)); 1736 1737 /* Update header info */ 1738 nop_out_pdu_header.opcode = nopout_hdr->opcode; 1739 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1); 1740 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0); 1741 1742 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun)); 1743 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]); 1744 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]); 1745 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn); 1746 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn); 1747 1748 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd); 1749 1750 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) { 1751 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt); 1752 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt); 1753 } else { 1754 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt)); 1755 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES; 1756 1757 spin_lock(&qedi_conn->list_lock); 1758 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list); 1759 qedi_cmd->io_cmd_in_list = true; 1760 qedi_conn->active_cmd_count++; 1761 spin_unlock(&qedi_conn->list_lock); 1762 } 1763 1764 /* Fill tx AHS and rx buffer */ 1765 if (data_len) { 1766 tx_sgl_task_params.sgl = 1767 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl; 1768 tx_sgl_task_params.sgl_phys_addr.lo = 1769 (u32)(qedi_conn->gen_pdu.req_dma_addr); 1770 tx_sgl_task_params.sgl_phys_addr.hi = 1771 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32); 1772 tx_sgl_task_params.total_buffer_size = data_len; 1773 tx_sgl_task_params.num_sges = 1; 1774 1775 rx_sgl_task_params.sgl = 1776 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl; 1777 rx_sgl_task_params.sgl_phys_addr.lo = 1778 (u32)(qedi_conn->gen_pdu.resp_dma_addr); 1779 rx_sgl_task_params.sgl_phys_addr.hi = 1780 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32); 1781 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len; 1782 rx_sgl_task_params.num_sges = 1; 1783 } 1784 1785 /* Fill fw input params */ 1786 task_params.context = fw_task_ctx; 1787 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 1788 task_params.itid = tid; 1789 task_params.cq_rss_number = 0; 1790 task_params.tx_io_size = data_len; 1791 task_params.rx_io_size = resp_sge->sge_len; 1792 1793 sq_idx = qedi_get_wqe_idx(qedi_conn); 1794 task_params.sqe = &ep->sq[sq_idx]; 1795 1796 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 1797 rval = init_initiator_nop_out_task(&task_params, 1798 &nop_out_pdu_header, 1799 &tx_sgl_task_params, 1800 &rx_sgl_task_params); 1801 if (rval) 1802 return -1; 1803 1804 qedi_ring_doorbell(qedi_conn); 1805 return 0; 1806 } 1807 1808 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len, 1809 int bd_index) 1810 { 1811 struct scsi_sge *bd = cmd->io_tbl.sge_tbl; 1812 int frag_size, sg_frags; 1813 1814 sg_frags = 0; 1815 1816 while (sg_len) { 1817 if (addr % QEDI_PAGE_SIZE) 1818 frag_size = 1819 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE)); 1820 else 1821 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 : 1822 (sg_len % QEDI_BD_SPLIT_SZ); 1823 1824 if (frag_size == 0) 1825 frag_size = QEDI_BD_SPLIT_SZ; 1826 1827 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff); 1828 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32); 1829 bd[bd_index + sg_frags].sge_len = (u16)frag_size; 1830 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO, 1831 "split sge %d: addr=%llx, len=%x", 1832 (bd_index + sg_frags), addr, frag_size); 1833 1834 addr += (u64)frag_size; 1835 sg_frags++; 1836 sg_len -= frag_size; 1837 } 1838 return sg_frags; 1839 } 1840 1841 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd) 1842 { 1843 struct scsi_cmnd *sc = cmd->scsi_cmd; 1844 struct scsi_sge *bd = cmd->io_tbl.sge_tbl; 1845 struct scatterlist *sg; 1846 int byte_count = 0; 1847 int bd_count = 0; 1848 int sg_count; 1849 int sg_len; 1850 int sg_frags; 1851 u64 addr, end_addr; 1852 int i; 1853 1854 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD); 1855 1856 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc), 1857 scsi_sg_count(sc), sc->sc_data_direction); 1858 1859 /* 1860 * New condition to send single SGE as cached-SGL. 1861 * Single SGE with length less than 64K. 1862 */ 1863 sg = scsi_sglist(sc); 1864 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) { 1865 sg_len = sg_dma_len(sg); 1866 addr = (u64)sg_dma_address(sg); 1867 1868 bd[bd_count].sge_addr.lo = (addr & 0xffffffff); 1869 bd[bd_count].sge_addr.hi = (addr >> 32); 1870 bd[bd_count].sge_len = (u16)sg_len; 1871 1872 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, 1873 "single-cached-sgl: bd_count:%d addr=%llx, len=%x", 1874 sg_count, addr, sg_len); 1875 1876 return ++bd_count; 1877 } 1878 1879 scsi_for_each_sg(sc, sg, sg_count, i) { 1880 sg_len = sg_dma_len(sg); 1881 addr = (u64)sg_dma_address(sg); 1882 end_addr = (addr + sg_len); 1883 1884 /* 1885 * first sg elem in the 'list', 1886 * check if end addr is page-aligned. 1887 */ 1888 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE)) 1889 cmd->use_slowpath = true; 1890 1891 /* 1892 * last sg elem in the 'list', 1893 * check if start addr is page-aligned. 1894 */ 1895 else if ((i == (sg_count - 1)) && 1896 (sg_count > 1) && (addr % QEDI_PAGE_SIZE)) 1897 cmd->use_slowpath = true; 1898 1899 /* 1900 * middle sg elements in list, 1901 * check if start and end addr is page-aligned 1902 */ 1903 else if ((i != 0) && (i != (sg_count - 1)) && 1904 ((addr % QEDI_PAGE_SIZE) || 1905 (end_addr % QEDI_PAGE_SIZE))) 1906 cmd->use_slowpath = true; 1907 1908 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x", 1909 i, sg_len); 1910 1911 if (sg_len > QEDI_BD_SPLIT_SZ) { 1912 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count); 1913 } else { 1914 sg_frags = 1; 1915 bd[bd_count].sge_addr.lo = addr & 0xffffffff; 1916 bd[bd_count].sge_addr.hi = addr >> 32; 1917 bd[bd_count].sge_len = sg_len; 1918 } 1919 byte_count += sg_len; 1920 bd_count += sg_frags; 1921 } 1922 1923 if (byte_count != scsi_bufflen(sc)) 1924 QEDI_ERR(&qedi->dbg_ctx, 1925 "byte_count = %d != scsi_bufflen = %d\n", byte_count, 1926 scsi_bufflen(sc)); 1927 else 1928 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n", 1929 byte_count); 1930 1931 WARN_ON(byte_count != scsi_bufflen(sc)); 1932 1933 return bd_count; 1934 } 1935 1936 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd) 1937 { 1938 int bd_count; 1939 struct scsi_cmnd *sc = cmd->scsi_cmd; 1940 1941 if (scsi_sg_count(sc)) { 1942 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd); 1943 if (bd_count == 0) 1944 return; 1945 } else { 1946 struct scsi_sge *bd = cmd->io_tbl.sge_tbl; 1947 1948 bd[0].sge_addr.lo = 0; 1949 bd[0].sge_addr.hi = 0; 1950 bd[0].sge_len = 0; 1951 bd_count = 0; 1952 } 1953 cmd->io_tbl.sge_valid = bd_count; 1954 } 1955 1956 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp) 1957 { 1958 u32 dword; 1959 int lpcnt; 1960 u8 *srcp; 1961 1962 lpcnt = sc->cmd_len / sizeof(dword); 1963 srcp = (u8 *)sc->cmnd; 1964 while (lpcnt--) { 1965 memcpy(&dword, (const void *)srcp, 4); 1966 *dstp = cpu_to_be32(dword); 1967 srcp += 4; 1968 dstp++; 1969 } 1970 if (sc->cmd_len & 0x3) { 1971 dword = (u32)srcp[0] | ((u32)srcp[1] << 8); 1972 *dstp = cpu_to_be32(dword); 1973 } 1974 } 1975 1976 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task, 1977 u16 tid, int8_t direction) 1978 { 1979 struct qedi_io_log *io_log; 1980 struct iscsi_conn *conn = task->conn; 1981 struct qedi_conn *qedi_conn = conn->dd_data; 1982 struct scsi_cmnd *sc_cmd = task->sc; 1983 unsigned long flags; 1984 1985 spin_lock_irqsave(&qedi->io_trace_lock, flags); 1986 1987 io_log = &qedi->io_trace_buf[qedi->io_trace_idx]; 1988 io_log->direction = direction; 1989 io_log->task_id = tid; 1990 io_log->cid = qedi_conn->iscsi_conn_id; 1991 io_log->lun = sc_cmd->device->lun; 1992 io_log->op = sc_cmd->cmnd[0]; 1993 io_log->lba[0] = sc_cmd->cmnd[2]; 1994 io_log->lba[1] = sc_cmd->cmnd[3]; 1995 io_log->lba[2] = sc_cmd->cmnd[4]; 1996 io_log->lba[3] = sc_cmd->cmnd[5]; 1997 io_log->bufflen = scsi_bufflen(sc_cmd); 1998 io_log->sg_count = scsi_sg_count(sc_cmd); 1999 io_log->fast_sgs = qedi->fast_sgls; 2000 io_log->cached_sgs = qedi->cached_sgls; 2001 io_log->slow_sgs = qedi->slow_sgls; 2002 io_log->cached_sge = qedi->use_cached_sge; 2003 io_log->slow_sge = qedi->use_slow_sge; 2004 io_log->fast_sge = qedi->use_fast_sge; 2005 io_log->result = sc_cmd->result; 2006 io_log->jiffies = jiffies; 2007 io_log->blk_req_cpu = smp_processor_id(); 2008 2009 if (direction == QEDI_IO_TRACE_REQ) { 2010 /* For requests we only care about the submission CPU */ 2011 io_log->req_cpu = smp_processor_id() % qedi->num_queues; 2012 io_log->intr_cpu = 0; 2013 io_log->blk_rsp_cpu = 0; 2014 } else if (direction == QEDI_IO_TRACE_RSP) { 2015 io_log->req_cpu = smp_processor_id() % qedi->num_queues; 2016 io_log->intr_cpu = qedi->intr_cpu; 2017 io_log->blk_rsp_cpu = smp_processor_id(); 2018 } 2019 2020 qedi->io_trace_idx++; 2021 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE) 2022 qedi->io_trace_idx = 0; 2023 2024 qedi->use_cached_sge = false; 2025 qedi->use_slow_sge = false; 2026 qedi->use_fast_sge = false; 2027 2028 spin_unlock_irqrestore(&qedi->io_trace_lock, flags); 2029 } 2030 2031 int qedi_iscsi_send_ioreq(struct iscsi_task *task) 2032 { 2033 struct iscsi_conn *conn = task->conn; 2034 struct iscsi_session *session = conn->session; 2035 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); 2036 struct qedi_ctx *qedi = iscsi_host_priv(shost); 2037 struct qedi_conn *qedi_conn = conn->dd_data; 2038 struct qedi_cmd *cmd = task->dd_data; 2039 struct scsi_cmnd *sc = task->sc; 2040 struct iscsi_cmd_hdr cmd_pdu_header; 2041 struct scsi_sgl_task_params tx_sgl_task_params; 2042 struct scsi_sgl_task_params rx_sgl_task_params; 2043 struct scsi_sgl_task_params *prx_sgl = NULL; 2044 struct scsi_sgl_task_params *ptx_sgl = NULL; 2045 struct iscsi_task_params task_params; 2046 struct iscsi_conn_params conn_params; 2047 struct scsi_initiator_cmd_params cmd_params; 2048 struct e4_iscsi_task_context *fw_task_ctx; 2049 struct iscsi_cls_conn *cls_conn; 2050 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr; 2051 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE; 2052 struct qedi_endpoint *ep; 2053 u32 scsi_lun[2]; 2054 s16 tid = 0; 2055 u16 sq_idx = 0; 2056 u16 cq_idx; 2057 int rval = 0; 2058 2059 ep = qedi_conn->ep; 2060 cls_conn = qedi_conn->cls_conn; 2061 conn = cls_conn->dd_data; 2062 2063 qedi_iscsi_map_sg_list(cmd); 2064 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun); 2065 2066 tid = qedi_get_task_idx(qedi); 2067 if (tid == -1) 2068 return -ENOMEM; 2069 2070 fw_task_ctx = 2071 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, 2072 tid); 2073 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context)); 2074 2075 cmd->task_id = tid; 2076 2077 memset(&task_params, 0, sizeof(task_params)); 2078 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header)); 2079 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params)); 2080 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params)); 2081 memset(&conn_params, 0, sizeof(conn_params)); 2082 memset(&cmd_params, 0, sizeof(cmd_params)); 2083 2084 cq_idx = smp_processor_id() % qedi->num_queues; 2085 /* Update header info */ 2086 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR, 2087 ISCSI_ATTR_SIMPLE); 2088 if (hdr->cdb[0] != TEST_UNIT_READY) { 2089 if (sc->sc_data_direction == DMA_TO_DEVICE) { 2090 SET_FIELD(cmd_pdu_header.flags_attr, 2091 ISCSI_CMD_HDR_WRITE, 1); 2092 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE; 2093 } else { 2094 SET_FIELD(cmd_pdu_header.flags_attr, 2095 ISCSI_CMD_HDR_READ, 1); 2096 task_type = ISCSI_TASK_TYPE_INITIATOR_READ; 2097 } 2098 } 2099 2100 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]); 2101 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]); 2102 2103 qedi_update_itt_map(qedi, tid, task->itt, cmd); 2104 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt)); 2105 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length); 2106 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength); 2107 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn); 2108 cmd_pdu_header.hdr_first_byte = hdr->opcode; 2109 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb); 2110 2111 /* Fill tx AHS and rx buffer */ 2112 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) { 2113 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl; 2114 tx_sgl_task_params.sgl_phys_addr.lo = 2115 (u32)(cmd->io_tbl.sge_tbl_dma); 2116 tx_sgl_task_params.sgl_phys_addr.hi = 2117 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32); 2118 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc); 2119 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid; 2120 if (cmd->use_slowpath) 2121 tx_sgl_task_params.small_mid_sge = true; 2122 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) { 2123 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl; 2124 rx_sgl_task_params.sgl_phys_addr.lo = 2125 (u32)(cmd->io_tbl.sge_tbl_dma); 2126 rx_sgl_task_params.sgl_phys_addr.hi = 2127 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32); 2128 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc); 2129 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid; 2130 } 2131 2132 /* Add conn param */ 2133 conn_params.first_burst_length = conn->session->first_burst; 2134 conn_params.max_send_pdu_length = conn->max_xmit_dlength; 2135 conn_params.max_burst_length = conn->session->max_burst; 2136 if (conn->session->initial_r2t_en) 2137 conn_params.initial_r2t = true; 2138 if (conn->session->imm_data_en) 2139 conn_params.immediate_data = true; 2140 2141 /* Add cmd params */ 2142 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma; 2143 cmd_params.sense_data_buffer_phys_addr.hi = 2144 (u32)((u64)cmd->sense_buffer_dma >> 32); 2145 /* Fill fw input params */ 2146 task_params.context = fw_task_ctx; 2147 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id; 2148 task_params.itid = tid; 2149 task_params.cq_rss_number = cq_idx; 2150 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) 2151 task_params.tx_io_size = scsi_bufflen(sc); 2152 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) 2153 task_params.rx_io_size = scsi_bufflen(sc); 2154 2155 sq_idx = qedi_get_wqe_idx(qedi_conn); 2156 task_params.sqe = &ep->sq[sq_idx]; 2157 2158 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, 2159 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n", 2160 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ? 2161 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ? 2162 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"), 2163 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc), 2164 (u32)(cmd->io_tbl.sge_tbl_dma), 2165 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32)); 2166 2167 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 2168 2169 if (task_params.tx_io_size != 0) 2170 ptx_sgl = &tx_sgl_task_params; 2171 if (task_params.rx_io_size != 0) 2172 prx_sgl = &rx_sgl_task_params; 2173 2174 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params, 2175 &cmd_params, &cmd_pdu_header, 2176 ptx_sgl, prx_sgl, 2177 NULL); 2178 if (rval) 2179 return -1; 2180 2181 spin_lock(&qedi_conn->list_lock); 2182 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list); 2183 cmd->io_cmd_in_list = true; 2184 qedi_conn->active_cmd_count++; 2185 spin_unlock(&qedi_conn->list_lock); 2186 2187 qedi_ring_doorbell(qedi_conn); 2188 return 0; 2189 } 2190 2191 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted) 2192 { 2193 struct iscsi_task_params task_params; 2194 struct qedi_endpoint *ep; 2195 struct iscsi_conn *conn = task->conn; 2196 struct qedi_conn *qedi_conn = conn->dd_data; 2197 struct qedi_cmd *cmd = task->dd_data; 2198 u16 sq_idx = 0; 2199 int rval = 0; 2200 2201 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM, 2202 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n", 2203 cmd->task_id, get_itt(task->itt), task->state, 2204 cmd->state, qedi_conn->iscsi_conn_id); 2205 2206 memset(&task_params, 0, sizeof(task_params)); 2207 ep = qedi_conn->ep; 2208 2209 sq_idx = qedi_get_wqe_idx(qedi_conn); 2210 2211 task_params.sqe = &ep->sq[sq_idx]; 2212 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe)); 2213 task_params.itid = cmd->task_id; 2214 2215 rval = init_cleanup_task(&task_params); 2216 if (rval) 2217 return rval; 2218 2219 qedi_ring_doorbell(qedi_conn); 2220 return 0; 2221 } 2222