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