LCOV - code coverage report
Current view: top level - lib/nvme - nvme_pcie_common.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 428 861 49.7 %
Date: 2024-07-12 14:46:53 Functions: 30 52 57.7 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2021 Intel Corporation. All rights reserved.
       3             :  *   Copyright (c) 2021 Mellanox Technologies LTD. All rights reserved.
       4             :  *   Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
       5             :  */
       6             : 
       7             : /*
       8             :  * NVMe over PCIe common library
       9             :  */
      10             : 
      11             : #include "spdk/stdinc.h"
      12             : #include "spdk/likely.h"
      13             : #include "spdk/string.h"
      14             : #include "nvme_internal.h"
      15             : #include "nvme_pcie_internal.h"
      16             : #include "spdk/trace.h"
      17             : 
      18             : #include "spdk_internal/trace_defs.h"
      19             : 
      20             : __thread struct nvme_pcie_ctrlr *g_thread_mmio_ctrlr = NULL;
      21             : 
      22             : static struct spdk_nvme_pcie_stat g_dummy_stat = {};
      23             : 
      24             : static void nvme_pcie_fail_request_bad_vtophys(struct spdk_nvme_qpair *qpair,
      25             :                 struct nvme_tracker *tr);
      26             : 
      27             : static inline uint64_t
      28        2093 : nvme_pcie_vtophys(struct spdk_nvme_ctrlr *ctrlr, const void *buf, uint64_t *size)
      29             : {
      30        2093 :         if (spdk_likely(ctrlr->trid.trtype == SPDK_NVME_TRANSPORT_PCIE)) {
      31        2086 :                 return spdk_vtophys(buf, size);
      32             :         } else {
      33             :                 /* vfio-user address translation with IOVA=VA mode */
      34           7 :                 return (uint64_t)(uintptr_t)buf;
      35             :         }
      36             : }
      37             : 
      38             : int
      39           6 : nvme_pcie_qpair_reset(struct spdk_nvme_qpair *qpair)
      40             : {
      41           6 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
      42             :         uint32_t i;
      43             : 
      44             :         /* all head/tail vals are set to 0 */
      45           6 :         pqpair->last_sq_tail = pqpair->sq_tail = pqpair->sq_head = pqpair->cq_head = 0;
      46             : 
      47             :         /*
      48             :          * First time through the completion queue, HW will set phase
      49             :          *  bit on completions to 1.  So set this to 1 here, indicating
      50             :          *  we're looking for a 1 to know which entries have completed.
      51             :          *  we'll toggle the bit each time when the completion queue
      52             :          *  rolls over.
      53             :          */
      54           6 :         pqpair->flags.phase = 1;
      55          46 :         for (i = 0; i < pqpair->num_entries; i++) {
      56          40 :                 pqpair->cpl[i].status.p = 0;
      57             :         }
      58             : 
      59           6 :         return 0;
      60             : }
      61             : 
      62             : static void
      63          27 : nvme_qpair_construct_tracker(struct nvme_tracker *tr, uint16_t cid, uint64_t phys_addr)
      64             : {
      65          27 :         tr->prp_sgl_bus_addr = phys_addr + offsetof(struct nvme_tracker, u.prp);
      66          27 :         tr->cid = cid;
      67          27 :         tr->req = NULL;
      68          27 : }
      69             : 
      70             : static void *
      71           4 : nvme_pcie_ctrlr_alloc_cmb(struct spdk_nvme_ctrlr *ctrlr, uint64_t size, uint64_t alignment,
      72             :                           uint64_t *phys_addr)
      73             : {
      74           4 :         struct nvme_pcie_ctrlr *pctrlr = nvme_pcie_ctrlr(ctrlr);
      75             :         uintptr_t addr;
      76             : 
      77           4 :         if (pctrlr->cmb.mem_register_addr != NULL) {
      78             :                 /* BAR is mapped for data */
      79           1 :                 return NULL;
      80             :         }
      81             : 
      82           3 :         addr = (uintptr_t)pctrlr->cmb.bar_va + pctrlr->cmb.current_offset;
      83           3 :         addr = (addr + (alignment - 1)) & ~(alignment - 1);
      84             : 
      85             :         /* CMB may only consume part of the BAR, calculate accordingly */
      86           3 :         if (addr + size > ((uintptr_t)pctrlr->cmb.bar_va + pctrlr->cmb.size)) {
      87           1 :                 SPDK_ERRLOG("Tried to allocate past valid CMB range!\n");
      88           1 :                 return NULL;
      89             :         }
      90           2 :         *phys_addr = pctrlr->cmb.bar_pa + addr - (uintptr_t)pctrlr->cmb.bar_va;
      91             : 
      92           2 :         pctrlr->cmb.current_offset = (addr + size) - (uintptr_t)pctrlr->cmb.bar_va;
      93             : 
      94           2 :         return (void *)addr;
      95             : }
      96             : 
      97             : int
      98           4 : nvme_pcie_qpair_construct(struct spdk_nvme_qpair *qpair,
      99             :                           const struct spdk_nvme_io_qpair_opts *opts)
     100             : {
     101           4 :         struct spdk_nvme_ctrlr  *ctrlr = qpair->ctrlr;
     102           4 :         struct nvme_pcie_ctrlr  *pctrlr = nvme_pcie_ctrlr(ctrlr);
     103           4 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     104             :         struct nvme_tracker     *tr;
     105             :         uint16_t                i;
     106             :         uint16_t                num_trackers;
     107           4 :         size_t                  page_align = sysconf(_SC_PAGESIZE);
     108             :         size_t                  queue_align, queue_len;
     109           4 :         uint32_t                flags = SPDK_MALLOC_DMA;
     110             :         uint32_t                socket_id;
     111           4 :         uint64_t                sq_paddr = 0;
     112           4 :         uint64_t                cq_paddr = 0;
     113             : 
     114           4 :         if (opts) {
     115           2 :                 pqpair->sq_vaddr = opts->sq.vaddr;
     116           2 :                 pqpair->cq_vaddr = opts->cq.vaddr;
     117           2 :                 sq_paddr = opts->sq.paddr;
     118           2 :                 cq_paddr = opts->cq.paddr;
     119             :         }
     120             : 
     121           4 :         pqpair->retry_count = ctrlr->opts.transport_retry_count;
     122             : 
     123             :         /*
     124             :          * Limit the maximum number of completions to return per call to prevent wraparound,
     125             :          * and calculate how many trackers can be submitted at once without overflowing the
     126             :          * completion queue.
     127             :          */
     128           4 :         pqpair->max_completions_cap = pqpair->num_entries / 4;
     129           4 :         pqpair->max_completions_cap = spdk_max(pqpair->max_completions_cap, NVME_MIN_COMPLETIONS);
     130           4 :         pqpair->max_completions_cap = spdk_min(pqpair->max_completions_cap, NVME_MAX_COMPLETIONS);
     131           4 :         num_trackers = pqpair->num_entries - pqpair->max_completions_cap;
     132             : 
     133           4 :         SPDK_INFOLOG(nvme, "max_completions_cap = %" PRIu16 " num_trackers = %" PRIu16 "\n",
     134             :                      pqpair->max_completions_cap, num_trackers);
     135             : 
     136           4 :         assert(num_trackers != 0);
     137             : 
     138           4 :         pqpair->sq_in_cmb = false;
     139             : 
     140           4 :         if (nvme_qpair_is_admin_queue(&pqpair->qpair)) {
     141           1 :                 flags |= SPDK_MALLOC_SHARE;
     142             :         }
     143             : 
     144             :         /* cmd and cpl rings must be aligned on page size boundaries. */
     145           4 :         if (ctrlr->opts.use_cmb_sqs) {
     146           1 :                 pqpair->cmd = nvme_pcie_ctrlr_alloc_cmb(ctrlr, pqpair->num_entries * sizeof(struct spdk_nvme_cmd),
     147             :                                                         page_align, &pqpair->cmd_bus_addr);
     148           1 :                 if (pqpair->cmd != NULL) {
     149           1 :                         pqpair->sq_in_cmb = true;
     150             :                 }
     151             :         }
     152             : 
     153           4 :         if (pqpair->sq_in_cmb == false) {
     154           3 :                 if (pqpair->sq_vaddr) {
     155           1 :                         pqpair->cmd = pqpair->sq_vaddr;
     156             :                 } else {
     157             :                         /* To ensure physical address contiguity we make each ring occupy
     158             :                          * a single hugepage only. See MAX_IO_QUEUE_ENTRIES.
     159             :                          */
     160           2 :                         queue_len = pqpair->num_entries * sizeof(struct spdk_nvme_cmd);
     161           2 :                         queue_align = spdk_max(spdk_align32pow2(queue_len), page_align);
     162           2 :                         pqpair->cmd = spdk_zmalloc(queue_len, queue_align, NULL, SPDK_ENV_SOCKET_ID_ANY, flags);
     163           2 :                         if (pqpair->cmd == NULL) {
     164           0 :                                 SPDK_ERRLOG("alloc qpair_cmd failed\n");
     165           0 :                                 return -ENOMEM;
     166             :                         }
     167             :                 }
     168           3 :                 if (sq_paddr) {
     169           1 :                         assert(pqpair->sq_vaddr != NULL);
     170           1 :                         pqpair->cmd_bus_addr = sq_paddr;
     171             :                 } else {
     172           2 :                         pqpair->cmd_bus_addr = nvme_pcie_vtophys(ctrlr, pqpair->cmd, NULL);
     173           2 :                         if (pqpair->cmd_bus_addr == SPDK_VTOPHYS_ERROR) {
     174           0 :                                 SPDK_ERRLOG("spdk_vtophys(pqpair->cmd) failed\n");
     175           0 :                                 return -EFAULT;
     176             :                         }
     177             :                 }
     178             :         }
     179             : 
     180           4 :         if (pqpair->cq_vaddr) {
     181           2 :                 pqpair->cpl = pqpair->cq_vaddr;
     182             :         } else {
     183           2 :                 queue_len = pqpair->num_entries * sizeof(struct spdk_nvme_cpl);
     184           2 :                 queue_align = spdk_max(spdk_align32pow2(queue_len), page_align);
     185           2 :                 socket_id = spdk_nvme_ctrlr_get_socket_id(ctrlr);
     186           2 :                 pqpair->cpl = spdk_zmalloc(queue_len, queue_align, NULL, socket_id, flags);
     187           2 :                 if (pqpair->cpl == NULL) {
     188           0 :                         SPDK_ERRLOG("alloc qpair_cpl failed\n");
     189           0 :                         return -ENOMEM;
     190             :                 }
     191             :         }
     192           4 :         if (cq_paddr) {
     193           2 :                 assert(pqpair->cq_vaddr != NULL);
     194           2 :                 pqpair->cpl_bus_addr = cq_paddr;
     195             :         } else {
     196           2 :                 pqpair->cpl_bus_addr =  nvme_pcie_vtophys(ctrlr, pqpair->cpl, NULL);
     197           2 :                 if (pqpair->cpl_bus_addr == SPDK_VTOPHYS_ERROR) {
     198           0 :                         SPDK_ERRLOG("spdk_vtophys(pqpair->cpl) failed\n");
     199           0 :                         return -EFAULT;
     200             :                 }
     201             :         }
     202             : 
     203           4 :         pqpair->sq_tdbl = pctrlr->doorbell_base + (2 * qpair->id + 0) * pctrlr->doorbell_stride_u32;
     204           4 :         pqpair->cq_hdbl = pctrlr->doorbell_base + (2 * qpair->id + 1) * pctrlr->doorbell_stride_u32;
     205             : 
     206             :         /*
     207             :          * Reserve space for all of the trackers in a single allocation.
     208             :          *   struct nvme_tracker must be padded so that its size is already a power of 2.
     209             :          *   This ensures the PRP list embedded in the nvme_tracker object will not span a
     210             :          *   4KB boundary, while allowing access to trackers in tr[] via normal array indexing.
     211             :          */
     212           4 :         pqpair->tr = spdk_zmalloc(num_trackers * sizeof(*tr), sizeof(*tr), NULL,
     213             :                                   SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_SHARE);
     214           4 :         if (pqpair->tr == NULL) {
     215           0 :                 SPDK_ERRLOG("nvme_tr failed\n");
     216           0 :                 return -ENOMEM;
     217             :         }
     218             : 
     219           4 :         TAILQ_INIT(&pqpair->free_tr);
     220           4 :         TAILQ_INIT(&pqpair->outstanding_tr);
     221           4 :         pqpair->qpair.queue_depth = 0;
     222             : 
     223          31 :         for (i = 0; i < num_trackers; i++) {
     224          27 :                 tr = &pqpair->tr[i];
     225          27 :                 nvme_qpair_construct_tracker(tr, i, nvme_pcie_vtophys(ctrlr, tr, NULL));
     226          27 :                 TAILQ_INSERT_HEAD(&pqpair->free_tr, tr, tq_list);
     227             :         }
     228             : 
     229           4 :         nvme_pcie_qpair_reset(qpair);
     230             : 
     231           4 :         return 0;
     232             : }
     233             : 
     234             : int
     235           1 : nvme_pcie_ctrlr_construct_admin_qpair(struct spdk_nvme_ctrlr *ctrlr, uint16_t num_entries)
     236             : {
     237             :         struct nvme_pcie_qpair *pqpair;
     238             :         int rc;
     239             : 
     240           1 :         pqpair = spdk_zmalloc(sizeof(*pqpair), 64, NULL, SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_SHARE);
     241           1 :         if (pqpair == NULL) {
     242           0 :                 return -ENOMEM;
     243             :         }
     244             : 
     245           1 :         pqpair->num_entries = num_entries;
     246           1 :         pqpair->flags.delay_cmd_submit = 0;
     247           1 :         pqpair->pcie_state = NVME_PCIE_QPAIR_READY;
     248             : 
     249           1 :         ctrlr->adminq = &pqpair->qpair;
     250             : 
     251           1 :         rc = nvme_qpair_init(ctrlr->adminq,
     252             :                              0, /* qpair ID */
     253             :                              ctrlr,
     254             :                              SPDK_NVME_QPRIO_URGENT,
     255             :                              num_entries,
     256             :                              false);
     257           1 :         if (rc != 0) {
     258           0 :                 return rc;
     259             :         }
     260             : 
     261           1 :         pqpair->stat = spdk_zmalloc(sizeof(*pqpair->stat), 64, NULL, SPDK_ENV_SOCKET_ID_ANY,
     262             :                                     SPDK_MALLOC_SHARE);
     263           1 :         if (!pqpair->stat) {
     264           0 :                 SPDK_ERRLOG("Failed to allocate admin qpair statistics\n");
     265           0 :                 return -ENOMEM;
     266             :         }
     267             : 
     268           1 :         return nvme_pcie_qpair_construct(ctrlr->adminq, NULL);
     269             : }
     270             : 
     271             : /**
     272             :  * Note: the ctrlr_lock must be held when calling this function.
     273             :  */
     274             : void
     275           0 : nvme_pcie_qpair_insert_pending_admin_request(struct spdk_nvme_qpair *qpair,
     276             :                 struct nvme_request *req, struct spdk_nvme_cpl *cpl)
     277             : {
     278           0 :         struct spdk_nvme_ctrlr          *ctrlr = qpair->ctrlr;
     279           0 :         struct nvme_request             *active_req = req;
     280             :         struct spdk_nvme_ctrlr_process  *active_proc;
     281             : 
     282             :         /*
     283             :          * The admin request is from another process. Move to the per
     284             :          *  process list for that process to handle it later.
     285             :          */
     286           0 :         assert(nvme_qpair_is_admin_queue(qpair));
     287           0 :         assert(active_req->pid != getpid());
     288             : 
     289           0 :         active_proc = nvme_ctrlr_get_process(ctrlr, active_req->pid);
     290           0 :         if (active_proc) {
     291             :                 /* Save the original completion information */
     292           0 :                 memcpy(&active_req->cpl, cpl, sizeof(*cpl));
     293           0 :                 STAILQ_INSERT_TAIL(&active_proc->active_reqs, active_req, stailq);
     294             :         } else {
     295           0 :                 SPDK_ERRLOG("The owning process (pid %d) is not found. Dropping the request.\n",
     296             :                             active_req->pid);
     297           0 :                 nvme_cleanup_user_req(active_req);
     298           0 :                 nvme_free_request(active_req);
     299             :         }
     300           0 : }
     301             : 
     302             : /**
     303             :  * Note: the ctrlr_lock must be held when calling this function.
     304             :  */
     305             : void
     306           0 : nvme_pcie_qpair_complete_pending_admin_request(struct spdk_nvme_qpair *qpair)
     307             : {
     308           0 :         struct spdk_nvme_ctrlr          *ctrlr = qpair->ctrlr;
     309             :         struct nvme_request             *req, *tmp_req;
     310           0 :         pid_t                           pid = getpid();
     311             :         struct spdk_nvme_ctrlr_process  *proc;
     312             : 
     313             :         /*
     314             :          * Check whether there is any pending admin request from
     315             :          * other active processes.
     316             :          */
     317           0 :         assert(nvme_qpair_is_admin_queue(qpair));
     318             : 
     319           0 :         proc = nvme_ctrlr_get_current_process(ctrlr);
     320           0 :         if (!proc) {
     321           0 :                 SPDK_ERRLOG("the active process (pid %d) is not found for this controller.\n", pid);
     322           0 :                 assert(proc);
     323           0 :                 return;
     324             :         }
     325             : 
     326           0 :         STAILQ_FOREACH_SAFE(req, &proc->active_reqs, stailq, tmp_req) {
     327           0 :                 STAILQ_REMOVE(&proc->active_reqs, req, nvme_request, stailq);
     328             : 
     329           0 :                 assert(req->pid == pid);
     330             : 
     331           0 :                 nvme_complete_request(req->cb_fn, req->cb_arg, qpair, req, &req->cpl);
     332             :         }
     333             : }
     334             : 
     335             : int
     336           7 : nvme_pcie_ctrlr_cmd_create_io_cq(struct spdk_nvme_ctrlr *ctrlr,
     337             :                                  struct spdk_nvme_qpair *io_que, spdk_nvme_cmd_cb cb_fn,
     338             :                                  void *cb_arg)
     339             : {
     340           7 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(io_que);
     341             :         struct nvme_request *req;
     342             :         struct spdk_nvme_cmd *cmd;
     343             : 
     344           7 :         req = nvme_allocate_request_null(ctrlr->adminq, cb_fn, cb_arg);
     345           7 :         if (req == NULL) {
     346           2 :                 return -ENOMEM;
     347             :         }
     348             : 
     349           5 :         cmd = &req->cmd;
     350           5 :         cmd->opc = SPDK_NVME_OPC_CREATE_IO_CQ;
     351             : 
     352           5 :         cmd->cdw10_bits.create_io_q.qid = io_que->id;
     353           5 :         cmd->cdw10_bits.create_io_q.qsize = pqpair->num_entries - 1;
     354             : 
     355           5 :         cmd->cdw11_bits.create_io_cq.pc = 1;
     356           5 :         cmd->dptr.prp.prp1 = pqpair->cpl_bus_addr;
     357             : 
     358           5 :         return nvme_ctrlr_submit_admin_request(ctrlr, req);
     359             : }
     360             : 
     361             : int
     362           5 : nvme_pcie_ctrlr_cmd_create_io_sq(struct spdk_nvme_ctrlr *ctrlr,
     363             :                                  struct spdk_nvme_qpair *io_que, spdk_nvme_cmd_cb cb_fn, void *cb_arg)
     364             : {
     365           5 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(io_que);
     366             :         struct nvme_request *req;
     367             :         struct spdk_nvme_cmd *cmd;
     368             : 
     369           5 :         req = nvme_allocate_request_null(ctrlr->adminq, cb_fn, cb_arg);
     370           5 :         if (req == NULL) {
     371           1 :                 return -ENOMEM;
     372             :         }
     373             : 
     374           4 :         cmd = &req->cmd;
     375           4 :         cmd->opc = SPDK_NVME_OPC_CREATE_IO_SQ;
     376             : 
     377           4 :         cmd->cdw10_bits.create_io_q.qid = io_que->id;
     378           4 :         cmd->cdw10_bits.create_io_q.qsize = pqpair->num_entries - 1;
     379           4 :         cmd->cdw11_bits.create_io_sq.pc = 1;
     380           4 :         cmd->cdw11_bits.create_io_sq.qprio = io_que->qprio;
     381           4 :         cmd->cdw11_bits.create_io_sq.cqid = io_que->id;
     382           4 :         cmd->dptr.prp.prp1 = pqpair->cmd_bus_addr;
     383             : 
     384           4 :         return nvme_ctrlr_submit_admin_request(ctrlr, req);
     385             : }
     386             : 
     387             : int
     388           3 : nvme_pcie_ctrlr_cmd_delete_io_cq(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair,
     389             :                                  spdk_nvme_cmd_cb cb_fn, void *cb_arg)
     390             : {
     391             :         struct nvme_request *req;
     392             :         struct spdk_nvme_cmd *cmd;
     393             : 
     394           3 :         req = nvme_allocate_request_null(ctrlr->adminq, cb_fn, cb_arg);
     395           3 :         if (req == NULL) {
     396           1 :                 return -ENOMEM;
     397             :         }
     398             : 
     399           2 :         cmd = &req->cmd;
     400           2 :         cmd->opc = SPDK_NVME_OPC_DELETE_IO_CQ;
     401           2 :         cmd->cdw10_bits.delete_io_q.qid = qpair->id;
     402             : 
     403           2 :         return nvme_ctrlr_submit_admin_request(ctrlr, req);
     404             : }
     405             : 
     406             : int
     407           2 : nvme_pcie_ctrlr_cmd_delete_io_sq(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair,
     408             :                                  spdk_nvme_cmd_cb cb_fn, void *cb_arg)
     409             : {
     410             :         struct nvme_request *req;
     411             :         struct spdk_nvme_cmd *cmd;
     412             : 
     413           2 :         req = nvme_allocate_request_null(ctrlr->adminq, cb_fn, cb_arg);
     414           2 :         if (req == NULL) {
     415           1 :                 return -ENOMEM;
     416             :         }
     417             : 
     418           1 :         cmd = &req->cmd;
     419           1 :         cmd->opc = SPDK_NVME_OPC_DELETE_IO_SQ;
     420           1 :         cmd->cdw10_bits.delete_io_q.qid = qpair->id;
     421             : 
     422           1 :         return nvme_ctrlr_submit_admin_request(ctrlr, req);
     423             : }
     424             : 
     425             : static void
     426           1 : nvme_completion_sq_error_delete_cq_cb(void *arg, const struct spdk_nvme_cpl *cpl)
     427             : {
     428           1 :         struct spdk_nvme_qpair *qpair = arg;
     429           1 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
     430             : 
     431           1 :         if (spdk_nvme_cpl_is_error(cpl)) {
     432           0 :                 SPDK_ERRLOG("delete_io_cq failed!\n");
     433             :         }
     434             : 
     435           1 :         pqpair->pcie_state = NVME_PCIE_QPAIR_FAILED;
     436           1 : }
     437             : 
     438             : static void
     439           3 : nvme_completion_create_sq_cb(void *arg, const struct spdk_nvme_cpl *cpl)
     440             : {
     441           3 :         struct spdk_nvme_qpair *qpair = arg;
     442           3 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
     443           3 :         struct spdk_nvme_ctrlr  *ctrlr = qpair->ctrlr;
     444           3 :         struct nvme_pcie_ctrlr  *pctrlr = nvme_pcie_ctrlr(ctrlr);
     445             :         int rc;
     446             : 
     447           3 :         if (pqpair->flags.defer_destruction) {
     448             :                 /* This qpair was deleted by the application while the
     449             :                  * connection was still in progress.  We had to wait
     450             :                  * to free the qpair resources until this outstanding
     451             :                  * command was completed.  Now that we have the completion
     452             :                  * free it now.
     453             :                  */
     454           0 :                 nvme_pcie_qpair_destroy(qpair);
     455           0 :                 return;
     456             :         }
     457             : 
     458           3 :         if (spdk_nvme_cpl_is_error(cpl)) {
     459           1 :                 SPDK_ERRLOG("nvme_create_io_sq failed, deleting cq!\n");
     460           1 :                 rc = nvme_pcie_ctrlr_cmd_delete_io_cq(qpair->ctrlr, qpair, nvme_completion_sq_error_delete_cq_cb,
     461             :                                                       qpair);
     462           1 :                 if (rc != 0) {
     463           0 :                         SPDK_ERRLOG("Failed to send request to delete_io_cq with rc=%d\n", rc);
     464           0 :                         pqpair->pcie_state = NVME_PCIE_QPAIR_FAILED;
     465             :                 }
     466           1 :                 return;
     467             :         }
     468           2 :         pqpair->pcie_state = NVME_PCIE_QPAIR_READY;
     469           2 :         if (ctrlr->shadow_doorbell) {
     470           1 :                 pqpair->shadow_doorbell.sq_tdbl = ctrlr->shadow_doorbell + (2 * qpair->id + 0) *
     471           1 :                                                   pctrlr->doorbell_stride_u32;
     472           1 :                 pqpair->shadow_doorbell.cq_hdbl = ctrlr->shadow_doorbell + (2 * qpair->id + 1) *
     473           1 :                                                   pctrlr->doorbell_stride_u32;
     474           1 :                 pqpair->shadow_doorbell.sq_eventidx = ctrlr->eventidx + (2 * qpair->id + 0) *
     475           1 :                                                       pctrlr->doorbell_stride_u32;
     476           1 :                 pqpair->shadow_doorbell.cq_eventidx = ctrlr->eventidx + (2 * qpair->id + 1) *
     477           1 :                                                       pctrlr->doorbell_stride_u32;
     478           1 :                 pqpair->flags.has_shadow_doorbell = 1;
     479             :         } else {
     480           1 :                 pqpair->flags.has_shadow_doorbell = 0;
     481             :         }
     482           2 :         nvme_pcie_qpair_reset(qpair);
     483             : 
     484             : }
     485             : 
     486             : static void
     487           4 : nvme_completion_create_cq_cb(void *arg, const struct spdk_nvme_cpl *cpl)
     488             : {
     489           4 :         struct spdk_nvme_qpair *qpair = arg;
     490           4 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     491             :         int rc;
     492             : 
     493           4 :         if (pqpair->flags.defer_destruction) {
     494             :                 /* This qpair was deleted by the application while the
     495             :                  * connection was still in progress.  We had to wait
     496             :                  * to free the qpair resources until this outstanding
     497             :                  * command was completed.  Now that we have the completion
     498             :                  * free it now.
     499             :                  */
     500           0 :                 nvme_pcie_qpair_destroy(qpair);
     501           0 :                 return;
     502             :         }
     503             : 
     504           4 :         if (spdk_nvme_cpl_is_error(cpl)) {
     505           1 :                 pqpair->pcie_state = NVME_PCIE_QPAIR_FAILED;
     506           1 :                 SPDK_ERRLOG("nvme_create_io_cq failed!\n");
     507           1 :                 return;
     508             :         }
     509             : 
     510           3 :         rc = nvme_pcie_ctrlr_cmd_create_io_sq(qpair->ctrlr, qpair, nvme_completion_create_sq_cb, qpair);
     511             : 
     512           3 :         if (rc != 0) {
     513           0 :                 SPDK_ERRLOG("Failed to send request to create_io_sq, deleting cq!\n");
     514           0 :                 rc = nvme_pcie_ctrlr_cmd_delete_io_cq(qpair->ctrlr, qpair, nvme_completion_sq_error_delete_cq_cb,
     515             :                                                       qpair);
     516           0 :                 if (rc != 0) {
     517           0 :                         SPDK_ERRLOG("Failed to send request to delete_io_cq with rc=%d\n", rc);
     518           0 :                         pqpair->pcie_state = NVME_PCIE_QPAIR_FAILED;
     519             :                 }
     520           0 :                 return;
     521             :         }
     522           3 :         pqpair->pcie_state = NVME_PCIE_QPAIR_WAIT_FOR_SQ;
     523             : }
     524             : 
     525             : static int
     526           5 : _nvme_pcie_ctrlr_create_io_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair,
     527             :                                  uint16_t qid)
     528             : {
     529           5 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     530             :         int     rc;
     531             : 
     532             :         /* Statistics may already be allocated in the case of controller reset */
     533           5 :         if (qpair->poll_group) {
     534           5 :                 struct nvme_pcie_poll_group *group = SPDK_CONTAINEROF(qpair->poll_group,
     535             :                                                      struct nvme_pcie_poll_group, group);
     536             : 
     537           5 :                 pqpair->stat = &group->stats;
     538           5 :                 pqpair->shared_stats = true;
     539             :         } else {
     540           0 :                 if (pqpair->stat == NULL) {
     541           0 :                         pqpair->stat = calloc(1, sizeof(*pqpair->stat));
     542           0 :                         if (!pqpair->stat) {
     543           0 :                                 SPDK_ERRLOG("Failed to allocate qpair statistics\n");
     544           0 :                                 nvme_qpair_set_state(qpair, NVME_QPAIR_DISCONNECTED);
     545           0 :                                 return -ENOMEM;
     546             :                         }
     547             :                 }
     548             :         }
     549             : 
     550           5 :         rc = nvme_pcie_ctrlr_cmd_create_io_cq(ctrlr, qpair, nvme_completion_create_cq_cb, qpair);
     551             : 
     552           5 :         if (rc != 0) {
     553           1 :                 SPDK_ERRLOG("Failed to send request to create_io_cq\n");
     554           1 :                 nvme_qpair_set_state(qpair, NVME_QPAIR_DISCONNECTED);
     555           1 :                 return rc;
     556             :         }
     557           4 :         pqpair->pcie_state = NVME_PCIE_QPAIR_WAIT_FOR_CQ;
     558           4 :         return 0;
     559             : }
     560             : 
     561             : int
     562           5 : nvme_pcie_ctrlr_connect_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair)
     563             : {
     564           5 :         int rc = 0;
     565             : 
     566           5 :         if (!nvme_qpair_is_admin_queue(qpair)) {
     567           5 :                 rc = _nvme_pcie_ctrlr_create_io_qpair(ctrlr, qpair, qpair->id);
     568             :         } else {
     569           0 :                 nvme_qpair_set_state(qpair, NVME_QPAIR_CONNECTED);
     570             :         }
     571             : 
     572           5 :         return rc;
     573             : }
     574             : 
     575             : void
     576           0 : nvme_pcie_ctrlr_disconnect_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair)
     577             : {
     578           0 :         if (!nvme_qpair_is_admin_queue(qpair) || !ctrlr->is_disconnecting) {
     579           0 :                 nvme_transport_ctrlr_disconnect_qpair_done(qpair);
     580             :         } else {
     581             :                 /* If this function is called for the admin qpair via spdk_nvme_ctrlr_reset()
     582             :                  * or spdk_nvme_ctrlr_disconnect(), initiate a Controller Level Reset.
     583             :                  * Then we can abort trackers safely because the Controller Level Reset deletes
     584             :                  * all I/O SQ/CQs.
     585             :                  */
     586           0 :                 nvme_ctrlr_disable(ctrlr);
     587             :         }
     588           0 : }
     589             : 
     590             : /* Used when dst points to MMIO (i.e. CMB) in a virtual machine - in these cases we must
     591             :  * not use wide instructions because QEMU will not emulate such instructions to MMIO space.
     592             :  * So this function ensures we only copy 8 bytes at a time.
     593             :  */
     594             : static inline void
     595           0 : nvme_pcie_copy_command_mmio(struct spdk_nvme_cmd *dst, const struct spdk_nvme_cmd *src)
     596             : {
     597           0 :         uint64_t *dst64 = (uint64_t *)dst;
     598           0 :         const uint64_t *src64 = (const uint64_t *)src;
     599             :         uint32_t i;
     600             : 
     601           0 :         for (i = 0; i < sizeof(*dst) / 8; i++) {
     602           0 :                 dst64[i] = src64[i];
     603             :         }
     604           0 : }
     605             : 
     606             : static inline void
     607           0 : nvme_pcie_copy_command(struct spdk_nvme_cmd *dst, const struct spdk_nvme_cmd *src)
     608             : {
     609             :         /* dst and src are known to be non-overlapping and 64-byte aligned. */
     610             : #if defined(__SSE2__)
     611           0 :         __m128i *d128 = (__m128i *)dst;
     612           0 :         const __m128i *s128 = (const __m128i *)src;
     613             : 
     614           0 :         _mm_stream_si128(&d128[0], _mm_load_si128(&s128[0]));
     615           0 :         _mm_stream_si128(&d128[1], _mm_load_si128(&s128[1]));
     616           0 :         _mm_stream_si128(&d128[2], _mm_load_si128(&s128[2]));
     617           0 :         _mm_stream_si128(&d128[3], _mm_load_si128(&s128[3]));
     618             : #else
     619             :         *dst = *src;
     620             : #endif
     621           0 : }
     622             : 
     623             : void
     624           0 : nvme_pcie_qpair_submit_tracker(struct spdk_nvme_qpair *qpair, struct nvme_tracker *tr)
     625             : {
     626             :         struct nvme_request     *req;
     627           0 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     628           0 :         struct spdk_nvme_ctrlr  *ctrlr = qpair->ctrlr;
     629             : 
     630           0 :         req = tr->req;
     631           0 :         assert(req != NULL);
     632             : 
     633           0 :         spdk_trace_record(TRACE_NVME_PCIE_SUBMIT, qpair->id, 0, (uintptr_t)req, req->cb_arg,
     634             :                           (uint32_t)req->cmd.cid, (uint32_t)req->cmd.opc,
     635             :                           req->cmd.cdw10, req->cmd.cdw11, req->cmd.cdw12,
     636             :                           pqpair->qpair.queue_depth);
     637             : 
     638           0 :         if (req->cmd.fuse) {
     639             :                 /*
     640             :                  * Keep track of the fuse operation sequence so that we ring the doorbell only
     641             :                  * after the second fuse is submitted.
     642             :                  */
     643           0 :                 qpair->last_fuse = req->cmd.fuse;
     644             :         }
     645             : 
     646             :         /* Don't use wide instructions to copy NVMe command, this is limited by QEMU
     647             :          * virtual NVMe controller, the maximum access width is 8 Bytes for one time.
     648             :          */
     649           0 :         if (spdk_unlikely((ctrlr->quirks & NVME_QUIRK_MAXIMUM_PCI_ACCESS_WIDTH) && pqpair->sq_in_cmb)) {
     650           0 :                 nvme_pcie_copy_command_mmio(&pqpair->cmd[pqpair->sq_tail], &req->cmd);
     651             :         } else {
     652             :                 /* Copy the command from the tracker to the submission queue. */
     653           0 :                 nvme_pcie_copy_command(&pqpair->cmd[pqpair->sq_tail], &req->cmd);
     654             :         }
     655             : 
     656           0 :         if (spdk_unlikely(++pqpair->sq_tail == pqpair->num_entries)) {
     657           0 :                 pqpair->sq_tail = 0;
     658             :         }
     659             : 
     660           0 :         if (spdk_unlikely(pqpair->sq_tail == pqpair->sq_head)) {
     661           0 :                 SPDK_ERRLOG("sq_tail is passing sq_head!\n");
     662             :         }
     663             : 
     664           0 :         if (!pqpair->flags.delay_cmd_submit) {
     665           0 :                 nvme_pcie_qpair_ring_sq_doorbell(qpair);
     666             :         }
     667           0 : }
     668             : 
     669             : void
     670           0 : nvme_pcie_qpair_complete_tracker(struct spdk_nvme_qpair *qpair, struct nvme_tracker *tr,
     671             :                                  struct spdk_nvme_cpl *cpl, bool print_on_error)
     672             : {
     673           0 :         struct nvme_pcie_qpair          *pqpair = nvme_pcie_qpair(qpair);
     674             :         struct nvme_request             *req;
     675             :         bool                            retry, error;
     676             :         bool                            print_error;
     677             : 
     678           0 :         req = tr->req;
     679             : 
     680           0 :         spdk_trace_record(TRACE_NVME_PCIE_COMPLETE, qpair->id, 0, (uintptr_t)req, req->cb_arg,
     681             :                           (uint32_t)req->cmd.cid, (uint32_t)cpl->status_raw, pqpair->qpair.queue_depth);
     682             : 
     683           0 :         assert(req != NULL);
     684             : 
     685           0 :         error = spdk_nvme_cpl_is_error(cpl);
     686           0 :         retry = error && nvme_completion_is_retry(cpl) &&
     687           0 :                 req->retries < pqpair->retry_count;
     688           0 :         print_error = error && print_on_error && !qpair->ctrlr->opts.disable_error_logging;
     689             : 
     690           0 :         if (print_error) {
     691           0 :                 spdk_nvme_qpair_print_command(qpair, &req->cmd);
     692             :         }
     693             : 
     694           0 :         if (print_error || SPDK_DEBUGLOG_FLAG_ENABLED("nvme")) {
     695           0 :                 spdk_nvme_qpair_print_completion(qpair, cpl);
     696             :         }
     697             : 
     698           0 :         assert(cpl->cid == req->cmd.cid);
     699             : 
     700           0 :         if (retry) {
     701           0 :                 req->retries++;
     702           0 :                 nvme_pcie_qpair_submit_tracker(qpair, tr);
     703             :         } else {
     704           0 :                 TAILQ_REMOVE(&pqpair->outstanding_tr, tr, tq_list);
     705           0 :                 pqpair->qpair.queue_depth--;
     706             : 
     707             :                 /* Only check admin requests from different processes. */
     708           0 :                 if (nvme_qpair_is_admin_queue(qpair) && req->pid != getpid()) {
     709           0 :                         nvme_pcie_qpair_insert_pending_admin_request(qpair, req, cpl);
     710             :                 } else {
     711           0 :                         nvme_complete_request(tr->cb_fn, tr->cb_arg, qpair, req, cpl);
     712             :                 }
     713             : 
     714           0 :                 tr->req = NULL;
     715             : 
     716           0 :                 TAILQ_INSERT_HEAD(&pqpair->free_tr, tr, tq_list);
     717             :         }
     718           0 : }
     719             : 
     720             : void
     721           0 : nvme_pcie_qpair_manual_complete_tracker(struct spdk_nvme_qpair *qpair,
     722             :                                         struct nvme_tracker *tr, uint32_t sct, uint32_t sc, uint32_t dnr,
     723             :                                         bool print_on_error)
     724             : {
     725           0 :         struct spdk_nvme_cpl    cpl;
     726             : 
     727           0 :         memset(&cpl, 0, sizeof(cpl));
     728           0 :         cpl.sqid = qpair->id;
     729           0 :         cpl.cid = tr->cid;
     730           0 :         cpl.status.sct = sct;
     731           0 :         cpl.status.sc = sc;
     732           0 :         cpl.status.dnr = dnr;
     733           0 :         nvme_pcie_qpair_complete_tracker(qpair, tr, &cpl, print_on_error);
     734           0 : }
     735             : 
     736             : void
     737           0 : nvme_pcie_qpair_abort_trackers(struct spdk_nvme_qpair *qpair, uint32_t dnr)
     738             : {
     739           0 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
     740             :         struct nvme_tracker *tr, *temp, *last;
     741             : 
     742           0 :         last = TAILQ_LAST(&pqpair->outstanding_tr, nvme_outstanding_tr_head);
     743             : 
     744             :         /* Abort previously submitted (outstanding) trs */
     745           0 :         TAILQ_FOREACH_SAFE(tr, &pqpair->outstanding_tr, tq_list, temp) {
     746           0 :                 if (!qpair->ctrlr->opts.disable_error_logging) {
     747           0 :                         SPDK_ERRLOG("aborting outstanding command\n");
     748             :                 }
     749           0 :                 nvme_pcie_qpair_manual_complete_tracker(qpair, tr, SPDK_NVME_SCT_GENERIC,
     750             :                                                         SPDK_NVME_SC_ABORTED_BY_REQUEST, dnr, true);
     751             : 
     752           0 :                 if (tr == last) {
     753           0 :                         break;
     754             :                 }
     755             :         }
     756           0 : }
     757             : 
     758             : void
     759           1 : nvme_pcie_admin_qpair_abort_aers(struct spdk_nvme_qpair *qpair)
     760             : {
     761           1 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     762             :         struct nvme_tracker     *tr;
     763             : 
     764           1 :         tr = TAILQ_FIRST(&pqpair->outstanding_tr);
     765           1 :         while (tr != NULL) {
     766           0 :                 assert(tr->req != NULL);
     767           0 :                 if (tr->req->cmd.opc == SPDK_NVME_OPC_ASYNC_EVENT_REQUEST) {
     768           0 :                         nvme_pcie_qpair_manual_complete_tracker(qpair, tr,
     769             :                                                                 SPDK_NVME_SCT_GENERIC, SPDK_NVME_SC_ABORTED_SQ_DELETION, 0,
     770             :                                                                 false);
     771           0 :                         tr = TAILQ_FIRST(&pqpair->outstanding_tr);
     772             :                 } else {
     773           0 :                         tr = TAILQ_NEXT(tr, tq_list);
     774             :                 }
     775             :         }
     776           1 : }
     777             : 
     778             : void
     779           1 : nvme_pcie_admin_qpair_destroy(struct spdk_nvme_qpair *qpair)
     780             : {
     781           1 :         nvme_pcie_admin_qpair_abort_aers(qpair);
     782           1 : }
     783             : 
     784             : void
     785           0 : nvme_pcie_qpair_abort_reqs(struct spdk_nvme_qpair *qpair, uint32_t dnr)
     786             : {
     787           0 :         nvme_pcie_qpair_abort_trackers(qpair, dnr);
     788           0 : }
     789             : 
     790             : static void
     791           0 : nvme_pcie_qpair_check_timeout(struct spdk_nvme_qpair *qpair)
     792             : {
     793             :         uint64_t t02;
     794             :         struct nvme_tracker *tr, *tmp;
     795           0 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
     796           0 :         struct spdk_nvme_ctrlr *ctrlr = qpair->ctrlr;
     797             :         struct spdk_nvme_ctrlr_process *active_proc;
     798             : 
     799             :         /* Don't check timeouts during controller initialization. */
     800           0 :         if (ctrlr->state != NVME_CTRLR_STATE_READY) {
     801           0 :                 return;
     802             :         }
     803             : 
     804           0 :         if (nvme_qpair_is_admin_queue(qpair)) {
     805           0 :                 active_proc = nvme_ctrlr_get_current_process(ctrlr);
     806             :         } else {
     807           0 :                 active_proc = qpair->active_proc;
     808             :         }
     809             : 
     810             :         /* Only check timeouts if the current process has a timeout callback. */
     811           0 :         if (active_proc == NULL || active_proc->timeout_cb_fn == NULL) {
     812           0 :                 return;
     813             :         }
     814             : 
     815           0 :         t02 = spdk_get_ticks();
     816           0 :         TAILQ_FOREACH_SAFE(tr, &pqpair->outstanding_tr, tq_list, tmp) {
     817           0 :                 assert(tr->req != NULL);
     818             : 
     819           0 :                 if (nvme_request_check_timeout(tr->req, tr->cid, active_proc, t02)) {
     820             :                         /*
     821             :                          * The requests are in order, so as soon as one has not timed out,
     822             :                          * stop iterating.
     823             :                          */
     824           0 :                         break;
     825             :                 }
     826             :         }
     827             : }
     828             : 
     829             : int32_t
     830           0 : nvme_pcie_qpair_process_completions(struct spdk_nvme_qpair *qpair, uint32_t max_completions)
     831             : {
     832           0 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
     833             :         struct nvme_tracker     *tr;
     834             :         struct spdk_nvme_cpl    *cpl, *next_cpl;
     835           0 :         uint32_t                 num_completions = 0;
     836           0 :         struct spdk_nvme_ctrlr  *ctrlr = qpair->ctrlr;
     837             :         uint16_t                 next_cq_head;
     838             :         uint8_t                  next_phase;
     839           0 :         bool                     next_is_valid = false;
     840             :         int                      rc;
     841             : 
     842           0 :         if (spdk_unlikely(pqpair->pcie_state == NVME_PCIE_QPAIR_FAILED)) {
     843           0 :                 return -ENXIO;
     844             :         }
     845             : 
     846           0 :         if (spdk_unlikely(nvme_qpair_get_state(qpair) == NVME_QPAIR_CONNECTING)) {
     847           0 :                 if (pqpair->pcie_state == NVME_PCIE_QPAIR_READY) {
     848             :                         /* It is possible that another thread set the pcie_state to
     849             :                          * QPAIR_READY, if it polled the adminq and processed the SQ
     850             :                          * completion for this qpair.  So check for that condition
     851             :                          * here and then update the qpair's state to CONNECTED, since
     852             :                          * we can only set the qpair state from the qpair's thread.
     853             :                          * (Note: this fixed issue #2157.)
     854             :                          */
     855           0 :                         nvme_qpair_set_state(qpair, NVME_QPAIR_CONNECTED);
     856           0 :                 } else if (pqpair->pcie_state == NVME_PCIE_QPAIR_FAILED) {
     857           0 :                         nvme_qpair_set_state(qpair, NVME_QPAIR_DISCONNECTED);
     858           0 :                         return -ENXIO;
     859             :                 } else {
     860           0 :                         rc = spdk_nvme_qpair_process_completions(ctrlr->adminq, 0);
     861           0 :                         if (rc < 0) {
     862           0 :                                 return rc;
     863           0 :                         } else if (pqpair->pcie_state == NVME_PCIE_QPAIR_FAILED) {
     864           0 :                                 nvme_qpair_set_state(qpair, NVME_QPAIR_DISCONNECTED);
     865           0 :                                 return -ENXIO;
     866             :                         }
     867             :                 }
     868           0 :                 return 0;
     869             :         }
     870             : 
     871           0 :         if (spdk_unlikely(nvme_qpair_is_admin_queue(qpair))) {
     872           0 :                 nvme_ctrlr_lock(ctrlr);
     873             :         }
     874             : 
     875           0 :         if (max_completions == 0 || max_completions > pqpair->max_completions_cap) {
     876             :                 /*
     877             :                  * max_completions == 0 means unlimited, but complete at most
     878             :                  * max_completions_cap batch of I/O at a time so that the completion
     879             :                  * queue doorbells don't wrap around.
     880             :                  */
     881           0 :                 max_completions = pqpair->max_completions_cap;
     882             :         }
     883             : 
     884           0 :         pqpair->stat->polls++;
     885             : 
     886             :         while (1) {
     887           0 :                 cpl = &pqpair->cpl[pqpair->cq_head];
     888             : 
     889           0 :                 if (!next_is_valid && cpl->status.p != pqpair->flags.phase) {
     890           0 :                         break;
     891             :                 }
     892             : 
     893           0 :                 if (spdk_likely(pqpair->cq_head + 1 != pqpair->num_entries)) {
     894           0 :                         next_cq_head = pqpair->cq_head + 1;
     895           0 :                         next_phase = pqpair->flags.phase;
     896             :                 } else {
     897           0 :                         next_cq_head = 0;
     898           0 :                         next_phase = !pqpair->flags.phase;
     899             :                 }
     900           0 :                 next_cpl = &pqpair->cpl[next_cq_head];
     901           0 :                 next_is_valid = (next_cpl->status.p == next_phase);
     902           0 :                 if (next_is_valid) {
     903           0 :                         __builtin_prefetch(&pqpair->tr[next_cpl->cid]);
     904             :                 }
     905             : 
     906             : #if defined(__PPC64__) || defined(__riscv) || defined(__loongarch__)
     907             :                 /*
     908             :                  * This memory barrier prevents reordering of:
     909             :                  * - load after store from/to tr
     910             :                  * - load after load cpl phase and cpl cid
     911             :                  */
     912             :                 spdk_mb();
     913             : #elif defined(__aarch64__)
     914             :                 __asm volatile("dmb oshld" ::: "memory");
     915             : #endif
     916             : 
     917           0 :                 if (spdk_unlikely(++pqpair->cq_head == pqpair->num_entries)) {
     918           0 :                         pqpair->cq_head = 0;
     919           0 :                         pqpair->flags.phase = !pqpair->flags.phase;
     920             :                 }
     921             : 
     922           0 :                 tr = &pqpair->tr[cpl->cid];
     923           0 :                 pqpair->sq_head = cpl->sqhd;
     924             : 
     925           0 :                 if (tr->req) {
     926             :                         /* Prefetch the req's STAILQ_ENTRY since we'll need to access it
     927             :                          * as part of putting the req back on the qpair's free list.
     928             :                          */
     929           0 :                         __builtin_prefetch(&tr->req->stailq);
     930           0 :                         nvme_pcie_qpair_complete_tracker(qpair, tr, cpl, true);
     931             :                 } else {
     932           0 :                         SPDK_ERRLOG("cpl does not map to outstanding cmd\n");
     933           0 :                         spdk_nvme_qpair_print_completion(qpair, cpl);
     934           0 :                         assert(0);
     935             :                 }
     936             : 
     937           0 :                 if (++num_completions == max_completions) {
     938           0 :                         break;
     939             :                 }
     940             :         }
     941             : 
     942           0 :         if (num_completions > 0) {
     943           0 :                 pqpair->stat->completions += num_completions;
     944           0 :                 nvme_pcie_qpair_ring_cq_doorbell(qpair);
     945             :         } else {
     946           0 :                 pqpair->stat->idle_polls++;
     947             :         }
     948             : 
     949           0 :         if (pqpair->flags.delay_cmd_submit) {
     950           0 :                 if (pqpair->last_sq_tail != pqpair->sq_tail) {
     951           0 :                         nvme_pcie_qpair_ring_sq_doorbell(qpair);
     952           0 :                         pqpair->last_sq_tail = pqpair->sq_tail;
     953             :                 }
     954             :         }
     955             : 
     956           0 :         if (spdk_unlikely(ctrlr->timeout_enabled)) {
     957             :                 /*
     958             :                  * User registered for timeout callback
     959             :                  */
     960           0 :                 nvme_pcie_qpair_check_timeout(qpair);
     961             :         }
     962             : 
     963             :         /* Before returning, complete any pending admin request or
     964             :          * process the admin qpair disconnection.
     965             :          */
     966           0 :         if (spdk_unlikely(nvme_qpair_is_admin_queue(qpair))) {
     967           0 :                 nvme_pcie_qpair_complete_pending_admin_request(qpair);
     968             : 
     969           0 :                 if (nvme_qpair_get_state(qpair) == NVME_QPAIR_DISCONNECTING) {
     970           0 :                         rc = nvme_ctrlr_disable_poll(qpair->ctrlr);
     971           0 :                         if (rc != -EAGAIN) {
     972           0 :                                 nvme_transport_ctrlr_disconnect_qpair_done(qpair);
     973             :                         }
     974             :                 }
     975             : 
     976           0 :                 nvme_ctrlr_unlock(ctrlr);
     977             :         }
     978             : 
     979           0 :         if (spdk_unlikely(pqpair->flags.has_pending_vtophys_failures)) {
     980             :                 struct nvme_tracker *tr, *tmp;
     981             : 
     982           0 :                 TAILQ_FOREACH_SAFE(tr, &pqpair->outstanding_tr, tq_list, tmp) {
     983           0 :                         if (tr->bad_vtophys) {
     984           0 :                                 tr->bad_vtophys = 0;
     985           0 :                                 nvme_pcie_fail_request_bad_vtophys(qpair, tr);
     986             :                         }
     987             :                 }
     988           0 :                 pqpair->flags.has_pending_vtophys_failures = 0;
     989             :         }
     990             : 
     991           0 :         return num_completions;
     992             : }
     993             : 
     994             : int
     995           4 : nvme_pcie_qpair_destroy(struct spdk_nvme_qpair *qpair)
     996             : {
     997           4 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
     998             : 
     999           4 :         if (nvme_qpair_is_admin_queue(qpair)) {
    1000           1 :                 nvme_pcie_admin_qpair_destroy(qpair);
    1001             :         }
    1002             :         /*
    1003             :          * We check sq_vaddr and cq_vaddr to see if the user specified the memory
    1004             :          * buffers when creating the I/O queue.
    1005             :          * If the user specified them, we cannot free that memory.
    1006             :          * Nor do we free it if it's in the CMB.
    1007             :          */
    1008           4 :         if (!pqpair->sq_vaddr && pqpair->cmd && !pqpair->sq_in_cmb) {
    1009           2 :                 spdk_free(pqpair->cmd);
    1010             :         }
    1011           4 :         if (!pqpair->cq_vaddr && pqpair->cpl) {
    1012           2 :                 spdk_free(pqpair->cpl);
    1013             :         }
    1014           4 :         if (pqpair->tr) {
    1015           4 :                 spdk_free(pqpair->tr);
    1016             :         }
    1017             : 
    1018           4 :         nvme_qpair_deinit(qpair);
    1019             : 
    1020           4 :         if (!pqpair->shared_stats && (!qpair->active_proc ||
    1021           0 :                                       qpair->active_proc == nvme_ctrlr_get_current_process(qpair->ctrlr))) {
    1022           4 :                 if (qpair->id) {
    1023           3 :                         free(pqpair->stat);
    1024             :                 } else {
    1025             :                         /* statistics of admin qpair are allocates from huge pages because
    1026             :                          * admin qpair is shared for multi-process */
    1027           1 :                         spdk_free(pqpair->stat);
    1028             :                 }
    1029             : 
    1030             :         }
    1031             : 
    1032           4 :         spdk_free(pqpair);
    1033             : 
    1034           4 :         return 0;
    1035             : }
    1036             : 
    1037             : struct spdk_nvme_qpair *
    1038           0 : nvme_pcie_ctrlr_create_io_qpair(struct spdk_nvme_ctrlr *ctrlr, uint16_t qid,
    1039             :                                 const struct spdk_nvme_io_qpair_opts *opts)
    1040             : {
    1041             :         struct nvme_pcie_qpair *pqpair;
    1042             :         struct spdk_nvme_qpair *qpair;
    1043             :         int rc;
    1044             : 
    1045           0 :         assert(ctrlr != NULL);
    1046             : 
    1047           0 :         pqpair = spdk_zmalloc(sizeof(*pqpair), 64, NULL,
    1048             :                               SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_SHARE);
    1049           0 :         if (pqpair == NULL) {
    1050           0 :                 return NULL;
    1051             :         }
    1052             : 
    1053           0 :         pqpair->num_entries = opts->io_queue_size;
    1054           0 :         pqpair->flags.delay_cmd_submit = opts->delay_cmd_submit;
    1055             : 
    1056           0 :         qpair = &pqpair->qpair;
    1057             : 
    1058           0 :         rc = nvme_qpair_init(qpair, qid, ctrlr, opts->qprio, opts->io_queue_requests, opts->async_mode);
    1059           0 :         if (rc != 0) {
    1060           0 :                 nvme_pcie_qpair_destroy(qpair);
    1061           0 :                 return NULL;
    1062             :         }
    1063             : 
    1064           0 :         rc = nvme_pcie_qpair_construct(qpair, opts);
    1065             : 
    1066           0 :         if (rc != 0) {
    1067           0 :                 nvme_pcie_qpair_destroy(qpair);
    1068           0 :                 return NULL;
    1069             :         }
    1070             : 
    1071           0 :         return qpair;
    1072             : }
    1073             : 
    1074             : int
    1075           0 : nvme_pcie_ctrlr_delete_io_qpair(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_qpair *qpair)
    1076             : {
    1077           0 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
    1078             :         struct nvme_completion_poll_status *status;
    1079             :         int rc;
    1080             : 
    1081           0 :         assert(ctrlr != NULL);
    1082             : 
    1083           0 :         if (ctrlr->is_removed) {
    1084           0 :                 goto free;
    1085             :         }
    1086             : 
    1087           0 :         if (ctrlr->prepare_for_reset) {
    1088           0 :                 if (nvme_qpair_get_state(qpair) == NVME_QPAIR_CONNECTING) {
    1089           0 :                         pqpair->flags.defer_destruction = true;
    1090             :                 }
    1091           0 :                 goto clear_shadow_doorbells;
    1092             :         }
    1093             : 
    1094             :         /* If attempting to delete a qpair that's still being connected, we have to wait until it's
    1095             :          * finished, so that we don't free it while it's waiting for the create cq/sq callbacks.
    1096             :          */
    1097           0 :         while (pqpair->pcie_state == NVME_PCIE_QPAIR_WAIT_FOR_CQ ||
    1098           0 :                pqpair->pcie_state == NVME_PCIE_QPAIR_WAIT_FOR_SQ) {
    1099           0 :                 rc = spdk_nvme_qpair_process_completions(ctrlr->adminq, 0);
    1100           0 :                 if (rc < 0) {
    1101           0 :                         break;
    1102             :                 }
    1103             :         }
    1104             : 
    1105           0 :         status = calloc(1, sizeof(*status));
    1106           0 :         if (!status) {
    1107           0 :                 SPDK_ERRLOG("Failed to allocate status tracker\n");
    1108           0 :                 goto free;
    1109             :         }
    1110             : 
    1111             :         /* Delete the I/O submission queue */
    1112           0 :         rc = nvme_pcie_ctrlr_cmd_delete_io_sq(ctrlr, qpair, nvme_completion_poll_cb, status);
    1113           0 :         if (rc != 0) {
    1114           0 :                 SPDK_ERRLOG("Failed to send request to delete_io_sq with rc=%d\n", rc);
    1115           0 :                 free(status);
    1116           0 :                 goto free;
    1117             :         }
    1118           0 :         if (nvme_wait_for_completion(ctrlr->adminq, status)) {
    1119           0 :                 if (!status->timed_out) {
    1120           0 :                         free(status);
    1121             :                 }
    1122           0 :                 goto free;
    1123             :         }
    1124             : 
    1125             :         /* Now that the submission queue is deleted, the device is supposed to have
    1126             :          * completed any outstanding I/O. Try to complete them. If they don't complete,
    1127             :          * they'll be marked as aborted and completed below. */
    1128           0 :         if (qpair->active_proc == nvme_ctrlr_get_current_process(ctrlr)) {
    1129           0 :                 nvme_pcie_qpair_process_completions(qpair, 0);
    1130             :         }
    1131             : 
    1132           0 :         memset(status, 0, sizeof(*status));
    1133             :         /* Delete the completion queue */
    1134           0 :         rc = nvme_pcie_ctrlr_cmd_delete_io_cq(ctrlr, qpair, nvme_completion_poll_cb, status);
    1135           0 :         if (rc != 0) {
    1136           0 :                 SPDK_ERRLOG("Failed to send request to delete_io_cq with rc=%d\n", rc);
    1137           0 :                 free(status);
    1138           0 :                 goto free;
    1139             :         }
    1140           0 :         if (nvme_wait_for_completion(ctrlr->adminq, status)) {
    1141           0 :                 if (!status->timed_out) {
    1142           0 :                         free(status);
    1143             :                 }
    1144           0 :                 goto free;
    1145             :         }
    1146           0 :         free(status);
    1147             : 
    1148           0 : clear_shadow_doorbells:
    1149           0 :         if (pqpair->flags.has_shadow_doorbell && ctrlr->shadow_doorbell) {
    1150           0 :                 *pqpair->shadow_doorbell.sq_tdbl = 0;
    1151           0 :                 *pqpair->shadow_doorbell.cq_hdbl = 0;
    1152           0 :                 *pqpair->shadow_doorbell.sq_eventidx = 0;
    1153           0 :                 *pqpair->shadow_doorbell.cq_eventidx = 0;
    1154             :         }
    1155           0 : free:
    1156           0 :         if (qpair->no_deletion_notification_needed == 0) {
    1157             :                 /* Abort the rest of the I/O */
    1158           0 :                 nvme_pcie_qpair_abort_trackers(qpair, 1);
    1159             :         }
    1160             : 
    1161           0 :         if (!pqpair->flags.defer_destruction) {
    1162           0 :                 nvme_pcie_qpair_destroy(qpair);
    1163             :         }
    1164           0 :         return 0;
    1165             : }
    1166             : 
    1167             : static void
    1168           3 : nvme_pcie_fail_request_bad_vtophys(struct spdk_nvme_qpair *qpair, struct nvme_tracker *tr)
    1169             : {
    1170           3 :         if (!qpair->in_completion_context) {
    1171           3 :                 struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
    1172             : 
    1173           3 :                 tr->bad_vtophys = 1;
    1174           3 :                 pqpair->flags.has_pending_vtophys_failures = 1;
    1175           3 :                 return;
    1176             :         }
    1177             : 
    1178             :         /*
    1179             :          * Bad vtophys translation, so abort this request and return
    1180             :          *  immediately.
    1181             :          */
    1182           0 :         SPDK_ERRLOG("vtophys or other payload buffer related error\n");
    1183           0 :         nvme_pcie_qpair_manual_complete_tracker(qpair, tr, SPDK_NVME_SCT_GENERIC,
    1184             :                                                 SPDK_NVME_SC_INVALID_FIELD,
    1185             :                                                 1 /* do not retry */, true);
    1186             : }
    1187             : 
    1188             : /*
    1189             :  * Append PRP list entries to describe a virtually contiguous buffer starting at virt_addr of len bytes.
    1190             :  *
    1191             :  * *prp_index will be updated to account for the number of PRP entries used.
    1192             :  */
    1193             : static inline int
    1194          25 : nvme_pcie_prp_list_append(struct spdk_nvme_ctrlr *ctrlr, struct nvme_tracker *tr,
    1195             :                           uint32_t *prp_index, void *virt_addr, size_t len,
    1196             :                           uint32_t page_size)
    1197             : {
    1198          25 :         struct spdk_nvme_cmd *cmd = &tr->req->cmd;
    1199          25 :         uintptr_t page_mask = page_size - 1;
    1200             :         uint64_t phys_addr;
    1201             :         uint32_t i;
    1202             : 
    1203          25 :         SPDK_DEBUGLOG(nvme, "prp_index:%u virt_addr:%p len:%u\n",
    1204             :                       *prp_index, virt_addr, (uint32_t)len);
    1205             : 
    1206          25 :         if (spdk_unlikely(((uintptr_t)virt_addr & 3) != 0)) {
    1207           2 :                 SPDK_ERRLOG("virt_addr %p not dword aligned\n", virt_addr);
    1208           2 :                 return -EFAULT;
    1209             :         }
    1210             : 
    1211          23 :         i = *prp_index;
    1212        2070 :         while (len) {
    1213             :                 uint32_t seg_len;
    1214             : 
    1215             :                 /*
    1216             :                  * prp_index 0 is stored in prp1, and the rest are stored in the prp[] array,
    1217             :                  * so prp_index == count is valid.
    1218             :                  */
    1219        2051 :                 if (spdk_unlikely(i > SPDK_COUNTOF(tr->u.prp))) {
    1220           2 :                         SPDK_ERRLOG("out of PRP entries\n");
    1221           2 :                         return -EFAULT;
    1222             :                 }
    1223             : 
    1224        2049 :                 phys_addr = nvme_pcie_vtophys(ctrlr, virt_addr, NULL);
    1225        2049 :                 if (spdk_unlikely(phys_addr == SPDK_VTOPHYS_ERROR)) {
    1226           1 :                         SPDK_ERRLOG("vtophys(%p) failed\n", virt_addr);
    1227           1 :                         return -EFAULT;
    1228             :                 }
    1229             : 
    1230        2048 :                 if (i == 0) {
    1231          19 :                         SPDK_DEBUGLOG(nvme, "prp1 = %p\n", (void *)phys_addr);
    1232          19 :                         cmd->dptr.prp.prp1 = phys_addr;
    1233          19 :                         seg_len = page_size - ((uintptr_t)virt_addr & page_mask);
    1234             :                 } else {
    1235        2029 :                         if ((phys_addr & page_mask) != 0) {
    1236           1 :                                 SPDK_ERRLOG("PRP %u not page aligned (%p)\n", i, virt_addr);
    1237           1 :                                 return -EFAULT;
    1238             :                         }
    1239             : 
    1240        2028 :                         SPDK_DEBUGLOG(nvme, "prp[%u] = %p\n", i - 1, (void *)phys_addr);
    1241        2028 :                         tr->u.prp[i - 1] = phys_addr;
    1242        2028 :                         seg_len = page_size;
    1243             :                 }
    1244             : 
    1245        2047 :                 seg_len = spdk_min(seg_len, len);
    1246        2047 :                 virt_addr = (uint8_t *)virt_addr + seg_len;
    1247        2047 :                 len -= seg_len;
    1248        2047 :                 i++;
    1249             :         }
    1250             : 
    1251          19 :         cmd->psdt = SPDK_NVME_PSDT_PRP;
    1252          19 :         if (i <= 1) {
    1253           6 :                 cmd->dptr.prp.prp2 = 0;
    1254          13 :         } else if (i == 2) {
    1255           6 :                 cmd->dptr.prp.prp2 = tr->u.prp[0];
    1256           6 :                 SPDK_DEBUGLOG(nvme, "prp2 = %p\n", (void *)cmd->dptr.prp.prp2);
    1257             :         } else {
    1258           7 :                 cmd->dptr.prp.prp2 = tr->prp_sgl_bus_addr;
    1259           7 :                 SPDK_DEBUGLOG(nvme, "prp2 = %p (PRP list)\n", (void *)cmd->dptr.prp.prp2);
    1260             :         }
    1261             : 
    1262          19 :         *prp_index = i;
    1263          19 :         return 0;
    1264             : }
    1265             : 
    1266             : static int
    1267           0 : nvme_pcie_qpair_build_request_invalid(struct spdk_nvme_qpair *qpair,
    1268             :                                       struct nvme_request *req, struct nvme_tracker *tr, bool dword_aligned)
    1269             : {
    1270           0 :         assert(0);
    1271             :         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1272             :         return -EINVAL;
    1273             : }
    1274             : 
    1275             : /**
    1276             :  * Build PRP list describing physically contiguous payload buffer.
    1277             :  */
    1278             : static int
    1279           4 : nvme_pcie_qpair_build_contig_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req,
    1280             :                                      struct nvme_tracker *tr, bool dword_aligned)
    1281             : {
    1282           4 :         uint32_t prp_index = 0;
    1283             :         int rc;
    1284             : 
    1285           4 :         rc = nvme_pcie_prp_list_append(qpair->ctrlr, tr, &prp_index,
    1286           4 :                                        (uint8_t *)req->payload.contig_or_cb_arg + req->payload_offset,
    1287           4 :                                        req->payload_size, qpair->ctrlr->page_size);
    1288           4 :         if (rc) {
    1289           1 :                 nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1290             :         }
    1291             : 
    1292           4 :         return rc;
    1293             : }
    1294             : 
    1295             : /**
    1296             :  * Build an SGL describing a physically contiguous payload buffer.
    1297             :  *
    1298             :  * This is more efficient than using PRP because large buffers can be
    1299             :  * described this way.
    1300             :  */
    1301             : static int
    1302           3 : nvme_pcie_qpair_build_contig_hw_sgl_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req,
    1303             :                 struct nvme_tracker *tr, bool dword_aligned)
    1304             : {
    1305             :         uint8_t *virt_addr;
    1306           3 :         uint64_t phys_addr, mapping_length;
    1307             :         uint32_t length;
    1308             :         struct spdk_nvme_sgl_descriptor *sgl;
    1309           3 :         uint32_t nseg = 0;
    1310             : 
    1311           3 :         assert(req->payload_size != 0);
    1312           3 :         assert(nvme_payload_type(&req->payload) == NVME_PAYLOAD_TYPE_CONTIG);
    1313             : 
    1314           3 :         sgl = tr->u.sgl;
    1315           3 :         req->cmd.psdt = SPDK_NVME_PSDT_SGL_MPTR_CONTIG;
    1316           3 :         req->cmd.dptr.sgl1.unkeyed.subtype = 0;
    1317             : 
    1318           3 :         length = req->payload_size;
    1319             :         /* ubsan complains about applying zero offset to null pointer if contig_or_cb_arg is NULL,
    1320             :          * so just double cast it to make it go away */
    1321           3 :         virt_addr = (uint8_t *)((uintptr_t)req->payload.contig_or_cb_arg + req->payload_offset);
    1322             : 
    1323           7 :         while (length > 0) {
    1324           4 :                 if (nseg >= NVME_MAX_SGL_DESCRIPTORS) {
    1325           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1326           0 :                         return -EFAULT;
    1327             :                 }
    1328             : 
    1329           4 :                 if (dword_aligned && ((uintptr_t)virt_addr & 3)) {
    1330           0 :                         SPDK_ERRLOG("virt_addr %p not dword aligned\n", virt_addr);
    1331           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1332           0 :                         return -EFAULT;
    1333             :                 }
    1334             : 
    1335           4 :                 mapping_length = length;
    1336           4 :                 phys_addr = nvme_pcie_vtophys(qpair->ctrlr, virt_addr, &mapping_length);
    1337           4 :                 if (phys_addr == SPDK_VTOPHYS_ERROR) {
    1338           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1339           0 :                         return -EFAULT;
    1340             :                 }
    1341             : 
    1342           4 :                 mapping_length = spdk_min(length, mapping_length);
    1343             : 
    1344           4 :                 length -= mapping_length;
    1345           4 :                 virt_addr += mapping_length;
    1346             : 
    1347           4 :                 sgl->unkeyed.type = SPDK_NVME_SGL_TYPE_DATA_BLOCK;
    1348           4 :                 sgl->unkeyed.length = mapping_length;
    1349           4 :                 sgl->address = phys_addr;
    1350           4 :                 sgl->unkeyed.subtype = 0;
    1351             : 
    1352           4 :                 sgl++;
    1353           4 :                 nseg++;
    1354             :         }
    1355             : 
    1356           3 :         if (nseg == 1) {
    1357             :                 /*
    1358             :                  * The whole transfer can be described by a single SGL descriptor.
    1359             :                  *  Use the special case described by the spec where SGL1's type is Data Block.
    1360             :                  *  This means the SGL in the tracker is not used at all, so copy the first (and only)
    1361             :                  *  SGL element into SGL1.
    1362             :                  */
    1363           2 :                 req->cmd.dptr.sgl1.unkeyed.type = SPDK_NVME_SGL_TYPE_DATA_BLOCK;
    1364           2 :                 req->cmd.dptr.sgl1.address = tr->u.sgl[0].address;
    1365           2 :                 req->cmd.dptr.sgl1.unkeyed.length = tr->u.sgl[0].unkeyed.length;
    1366             :         } else {
    1367             :                 /* SPDK NVMe driver supports only 1 SGL segment for now, it is enough because
    1368             :                  *  NVME_MAX_SGL_DESCRIPTORS * 16 is less than one page.
    1369             :                  */
    1370           1 :                 req->cmd.dptr.sgl1.unkeyed.type = SPDK_NVME_SGL_TYPE_LAST_SEGMENT;
    1371           1 :                 req->cmd.dptr.sgl1.address = tr->prp_sgl_bus_addr;
    1372           1 :                 req->cmd.dptr.sgl1.unkeyed.length = nseg * sizeof(struct spdk_nvme_sgl_descriptor);
    1373             :         }
    1374             : 
    1375           3 :         return 0;
    1376             : }
    1377             : 
    1378             : /**
    1379             :  * Build SGL list describing scattered payload buffer.
    1380             :  */
    1381             : static int
    1382           2 : nvme_pcie_qpair_build_hw_sgl_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req,
    1383             :                                      struct nvme_tracker *tr, bool dword_aligned)
    1384             : {
    1385             :         int rc;
    1386           2 :         void *virt_addr;
    1387           2 :         uint64_t phys_addr, mapping_length;
    1388           2 :         uint32_t remaining_transfer_len, remaining_user_sge_len, length;
    1389             :         struct spdk_nvme_sgl_descriptor *sgl;
    1390           2 :         uint32_t nseg = 0;
    1391             : 
    1392             :         /*
    1393             :          * Build scattered payloads.
    1394             :          */
    1395           2 :         assert(req->payload_size != 0);
    1396           2 :         assert(nvme_payload_type(&req->payload) == NVME_PAYLOAD_TYPE_SGL);
    1397           2 :         assert(req->payload.reset_sgl_fn != NULL);
    1398           2 :         assert(req->payload.next_sge_fn != NULL);
    1399           2 :         req->payload.reset_sgl_fn(req->payload.contig_or_cb_arg, req->payload_offset);
    1400             : 
    1401           2 :         sgl = tr->u.sgl;
    1402           2 :         req->cmd.psdt = SPDK_NVME_PSDT_SGL_MPTR_CONTIG;
    1403           2 :         req->cmd.dptr.sgl1.unkeyed.subtype = 0;
    1404             : 
    1405           2 :         remaining_transfer_len = req->payload_size;
    1406             : 
    1407           6 :         while (remaining_transfer_len > 0) {
    1408           4 :                 rc = req->payload.next_sge_fn(req->payload.contig_or_cb_arg,
    1409             :                                               &virt_addr, &remaining_user_sge_len);
    1410           4 :                 if (rc) {
    1411           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1412           0 :                         return -EFAULT;
    1413             :                 }
    1414             : 
    1415             :                 /* Bit Bucket SGL descriptor */
    1416           4 :                 if ((uint64_t)virt_addr == UINT64_MAX) {
    1417             :                         /* TODO: enable WRITE and COMPARE when necessary */
    1418           0 :                         if (req->cmd.opc != SPDK_NVME_OPC_READ) {
    1419           0 :                                 SPDK_ERRLOG("Only READ command can be supported\n");
    1420           0 :                                 goto exit;
    1421             :                         }
    1422           0 :                         if (nseg >= NVME_MAX_SGL_DESCRIPTORS) {
    1423           0 :                                 SPDK_ERRLOG("Too many SGL entries\n");
    1424           0 :                                 goto exit;
    1425             :                         }
    1426             : 
    1427           0 :                         sgl->unkeyed.type = SPDK_NVME_SGL_TYPE_BIT_BUCKET;
    1428             :                         /* If the SGL describes a destination data buffer, the length of data
    1429             :                          * buffer shall be discarded by controller, and the length is included
    1430             :                          * in Number of Logical Blocks (NLB) parameter. Otherwise, the length
    1431             :                          * is not included in the NLB parameter.
    1432             :                          */
    1433           0 :                         remaining_user_sge_len = spdk_min(remaining_user_sge_len, remaining_transfer_len);
    1434           0 :                         remaining_transfer_len -= remaining_user_sge_len;
    1435             : 
    1436           0 :                         sgl->unkeyed.length = remaining_user_sge_len;
    1437           0 :                         sgl->address = 0;
    1438           0 :                         sgl->unkeyed.subtype = 0;
    1439             : 
    1440           0 :                         sgl++;
    1441           0 :                         nseg++;
    1442             : 
    1443           0 :                         continue;
    1444             :                 }
    1445             : 
    1446           4 :                 remaining_user_sge_len = spdk_min(remaining_user_sge_len, remaining_transfer_len);
    1447           4 :                 remaining_transfer_len -= remaining_user_sge_len;
    1448           8 :                 while (remaining_user_sge_len > 0) {
    1449           4 :                         if (nseg >= NVME_MAX_SGL_DESCRIPTORS) {
    1450           0 :                                 SPDK_ERRLOG("Too many SGL entries\n");
    1451           0 :                                 goto exit;
    1452             :                         }
    1453             : 
    1454           4 :                         if (dword_aligned && ((uintptr_t)virt_addr & 3)) {
    1455           0 :                                 SPDK_ERRLOG("virt_addr %p not dword aligned\n", virt_addr);
    1456           0 :                                 goto exit;
    1457             :                         }
    1458             : 
    1459           4 :                         mapping_length = remaining_user_sge_len;
    1460           4 :                         phys_addr = nvme_pcie_vtophys(qpair->ctrlr, virt_addr, &mapping_length);
    1461           4 :                         if (phys_addr == SPDK_VTOPHYS_ERROR) {
    1462           0 :                                 goto exit;
    1463             :                         }
    1464             : 
    1465           4 :                         length = spdk_min(remaining_user_sge_len, mapping_length);
    1466           4 :                         remaining_user_sge_len -= length;
    1467           4 :                         virt_addr = (uint8_t *)virt_addr + length;
    1468             : 
    1469           4 :                         if (nseg > 0 && phys_addr ==
    1470           2 :                             (*(sgl - 1)).address + (*(sgl - 1)).unkeyed.length) {
    1471             :                                 /* extend previous entry */
    1472           0 :                                 (*(sgl - 1)).unkeyed.length += length;
    1473           0 :                                 continue;
    1474             :                         }
    1475             : 
    1476           4 :                         sgl->unkeyed.type = SPDK_NVME_SGL_TYPE_DATA_BLOCK;
    1477           4 :                         sgl->unkeyed.length = length;
    1478           4 :                         sgl->address = phys_addr;
    1479           4 :                         sgl->unkeyed.subtype = 0;
    1480             : 
    1481           4 :                         sgl++;
    1482           4 :                         nseg++;
    1483             :                 }
    1484             :         }
    1485             : 
    1486           2 :         if (nseg == 1) {
    1487             :                 /*
    1488             :                  * The whole transfer can be described by a single SGL descriptor.
    1489             :                  *  Use the special case described by the spec where SGL1's type is Data Block.
    1490             :                  *  This means the SGL in the tracker is not used at all, so copy the first (and only)
    1491             :                  *  SGL element into SGL1.
    1492             :                  */
    1493           1 :                 req->cmd.dptr.sgl1.unkeyed.type = SPDK_NVME_SGL_TYPE_DATA_BLOCK;
    1494           1 :                 req->cmd.dptr.sgl1.address = tr->u.sgl[0].address;
    1495           1 :                 req->cmd.dptr.sgl1.unkeyed.length = tr->u.sgl[0].unkeyed.length;
    1496             :         } else {
    1497             :                 /* SPDK NVMe driver supports only 1 SGL segment for now, it is enough because
    1498             :                  *  NVME_MAX_SGL_DESCRIPTORS * 16 is less than one page.
    1499             :                  */
    1500           1 :                 req->cmd.dptr.sgl1.unkeyed.type = SPDK_NVME_SGL_TYPE_LAST_SEGMENT;
    1501           1 :                 req->cmd.dptr.sgl1.address = tr->prp_sgl_bus_addr;
    1502           1 :                 req->cmd.dptr.sgl1.unkeyed.length = nseg * sizeof(struct spdk_nvme_sgl_descriptor);
    1503             :         }
    1504             : 
    1505           2 :         return 0;
    1506             : 
    1507           0 : exit:
    1508           0 :         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1509           0 :         return -EFAULT;
    1510             : }
    1511             : 
    1512             : /**
    1513             :  * Build PRP list describing scattered payload buffer.
    1514             :  */
    1515             : static int
    1516           1 : nvme_pcie_qpair_build_prps_sgl_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req,
    1517             :                                        struct nvme_tracker *tr, bool dword_aligned)
    1518             : {
    1519             :         int rc;
    1520           1 :         void *virt_addr;
    1521           1 :         uint32_t remaining_transfer_len, length;
    1522           1 :         uint32_t prp_index = 0;
    1523           1 :         uint32_t page_size = qpair->ctrlr->page_size;
    1524             : 
    1525             :         /*
    1526             :          * Build scattered payloads.
    1527             :          */
    1528           1 :         assert(nvme_payload_type(&req->payload) == NVME_PAYLOAD_TYPE_SGL);
    1529           1 :         assert(req->payload.reset_sgl_fn != NULL);
    1530           1 :         req->payload.reset_sgl_fn(req->payload.contig_or_cb_arg, req->payload_offset);
    1531             : 
    1532           1 :         remaining_transfer_len = req->payload_size;
    1533           2 :         while (remaining_transfer_len > 0) {
    1534           1 :                 assert(req->payload.next_sge_fn != NULL);
    1535           1 :                 rc = req->payload.next_sge_fn(req->payload.contig_or_cb_arg, &virt_addr, &length);
    1536           1 :                 if (rc) {
    1537           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1538           0 :                         return -EFAULT;
    1539             :                 }
    1540             : 
    1541           1 :                 length = spdk_min(remaining_transfer_len, length);
    1542             : 
    1543             :                 /*
    1544             :                  * Any incompatible sges should have been handled up in the splitting routine,
    1545             :                  *  but assert here as an additional check.
    1546             :                  *
    1547             :                  * All SGEs except last must end on a page boundary.
    1548             :                  */
    1549           1 :                 assert((length == remaining_transfer_len) ||
    1550             :                        _is_page_aligned((uintptr_t)virt_addr + length, page_size));
    1551             : 
    1552           1 :                 rc = nvme_pcie_prp_list_append(qpair->ctrlr, tr, &prp_index, virt_addr, length, page_size);
    1553           1 :                 if (rc) {
    1554           0 :                         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1555           0 :                         return rc;
    1556             :                 }
    1557             : 
    1558           1 :                 remaining_transfer_len -= length;
    1559             :         }
    1560             : 
    1561           1 :         return 0;
    1562             : }
    1563             : 
    1564             : typedef int(*build_req_fn)(struct spdk_nvme_qpair *, struct nvme_request *, struct nvme_tracker *,
    1565             :                            bool);
    1566             : 
    1567             : static build_req_fn const g_nvme_pcie_build_req_table[][2] = {
    1568             :         [NVME_PAYLOAD_TYPE_INVALID] = {
    1569             :                 nvme_pcie_qpair_build_request_invalid,                  /* PRP */
    1570             :                 nvme_pcie_qpair_build_request_invalid                   /* SGL */
    1571             :         },
    1572             :         [NVME_PAYLOAD_TYPE_CONTIG] = {
    1573             :                 nvme_pcie_qpair_build_contig_request,                   /* PRP */
    1574             :                 nvme_pcie_qpair_build_contig_hw_sgl_request             /* SGL */
    1575             :         },
    1576             :         [NVME_PAYLOAD_TYPE_SGL] = {
    1577             :                 nvme_pcie_qpair_build_prps_sgl_request,                 /* PRP */
    1578             :                 nvme_pcie_qpair_build_hw_sgl_request                    /* SGL */
    1579             :         }
    1580             : };
    1581             : 
    1582             : static int
    1583           5 : nvme_pcie_qpair_build_metadata(struct spdk_nvme_qpair *qpair, struct nvme_tracker *tr,
    1584             :                                bool sgl_supported, bool mptr_sgl_supported, bool dword_aligned)
    1585             : {
    1586             :         void *md_payload;
    1587           5 :         struct nvme_request *req = tr->req;
    1588           5 :         uint64_t mapping_length;
    1589             : 
    1590           5 :         if (req->payload.md) {
    1591           5 :                 md_payload = (uint8_t *)req->payload.md + req->md_offset;
    1592           5 :                 if (dword_aligned && ((uintptr_t)md_payload & 3)) {
    1593           0 :                         SPDK_ERRLOG("virt_addr %p not dword aligned\n", md_payload);
    1594           0 :                         goto exit;
    1595             :                 }
    1596             : 
    1597           5 :                 mapping_length = req->md_size;
    1598           5 :                 if (sgl_supported && mptr_sgl_supported && dword_aligned) {
    1599           2 :                         assert(req->cmd.psdt == SPDK_NVME_PSDT_SGL_MPTR_CONTIG);
    1600           2 :                         req->cmd.psdt = SPDK_NVME_PSDT_SGL_MPTR_SGL;
    1601             : 
    1602           2 :                         tr->meta_sgl.address = nvme_pcie_vtophys(qpair->ctrlr, md_payload, &mapping_length);
    1603           2 :                         if (tr->meta_sgl.address == SPDK_VTOPHYS_ERROR || mapping_length != req->md_size) {
    1604           1 :                                 goto exit;
    1605             :                         }
    1606           1 :                         tr->meta_sgl.unkeyed.type = SPDK_NVME_SGL_TYPE_DATA_BLOCK;
    1607           1 :                         tr->meta_sgl.unkeyed.length = req->md_size;
    1608           1 :                         tr->meta_sgl.unkeyed.subtype = 0;
    1609           1 :                         req->cmd.mptr = tr->prp_sgl_bus_addr - sizeof(struct spdk_nvme_sgl_descriptor);
    1610             :                 } else {
    1611           3 :                         req->cmd.mptr = nvme_pcie_vtophys(qpair->ctrlr, md_payload, &mapping_length);
    1612           3 :                         if (req->cmd.mptr == SPDK_VTOPHYS_ERROR || mapping_length != req->md_size) {
    1613           1 :                                 goto exit;
    1614             :                         }
    1615             :                 }
    1616             :         }
    1617             : 
    1618           3 :         return 0;
    1619             : 
    1620           2 : exit:
    1621           2 :         nvme_pcie_fail_request_bad_vtophys(qpair, tr);
    1622           2 :         return -EINVAL;
    1623             : }
    1624             : 
    1625             : int
    1626           0 : nvme_pcie_qpair_submit_request(struct spdk_nvme_qpair *qpair, struct nvme_request *req)
    1627             : {
    1628             :         struct nvme_tracker     *tr;
    1629           0 :         int                     rc = 0;
    1630           0 :         struct spdk_nvme_ctrlr  *ctrlr = qpair->ctrlr;
    1631           0 :         struct nvme_pcie_qpair  *pqpair = nvme_pcie_qpair(qpair);
    1632             :         enum nvme_payload_type  payload_type;
    1633             :         bool                    sgl_supported;
    1634             :         bool                    mptr_sgl_supported;
    1635           0 :         bool                    dword_aligned = true;
    1636             : 
    1637           0 :         if (spdk_unlikely(nvme_qpair_is_admin_queue(qpair))) {
    1638           0 :                 nvme_ctrlr_lock(ctrlr);
    1639             :         }
    1640             : 
    1641           0 :         tr = TAILQ_FIRST(&pqpair->free_tr);
    1642             : 
    1643           0 :         if (tr == NULL) {
    1644           0 :                 pqpair->stat->queued_requests++;
    1645             :                 /* Inform the upper layer to try again later. */
    1646           0 :                 rc = -EAGAIN;
    1647           0 :                 goto exit;
    1648             :         }
    1649             : 
    1650           0 :         pqpair->stat->submitted_requests++;
    1651           0 :         TAILQ_REMOVE(&pqpair->free_tr, tr, tq_list); /* remove tr from free_tr */
    1652           0 :         TAILQ_INSERT_TAIL(&pqpair->outstanding_tr, tr, tq_list);
    1653           0 :         pqpair->qpair.queue_depth++;
    1654           0 :         tr->req = req;
    1655           0 :         tr->cb_fn = req->cb_fn;
    1656           0 :         tr->cb_arg = req->cb_arg;
    1657           0 :         req->cmd.cid = tr->cid;
    1658             :         /* Use PRP by default. This bit will be overridden below if needed. */
    1659           0 :         req->cmd.psdt = SPDK_NVME_PSDT_PRP;
    1660             : 
    1661           0 :         if (req->payload_size != 0) {
    1662           0 :                 payload_type = nvme_payload_type(&req->payload);
    1663             :                 /* According to the specification, PRPs shall be used for all
    1664             :                  *  Admin commands for NVMe over PCIe implementations.
    1665             :                  */
    1666           0 :                 sgl_supported = (ctrlr->flags & SPDK_NVME_CTRLR_SGL_SUPPORTED) != 0 &&
    1667           0 :                                 !nvme_qpair_is_admin_queue(qpair);
    1668           0 :                 mptr_sgl_supported = (ctrlr->flags & SPDK_NVME_CTRLR_MPTR_SGL_SUPPORTED) != 0 &&
    1669           0 :                                      !nvme_qpair_is_admin_queue(qpair);
    1670             : 
    1671           0 :                 if (sgl_supported) {
    1672             :                         /* Don't use SGL for DSM command */
    1673           0 :                         if (spdk_unlikely((ctrlr->quirks & NVME_QUIRK_NO_SGL_FOR_DSM) &&
    1674             :                                           (req->cmd.opc == SPDK_NVME_OPC_DATASET_MANAGEMENT))) {
    1675           0 :                                 sgl_supported = false;
    1676             :                         }
    1677             :                 }
    1678             : 
    1679           0 :                 if (sgl_supported && !(ctrlr->flags & SPDK_NVME_CTRLR_SGL_REQUIRES_DWORD_ALIGNMENT)) {
    1680           0 :                         dword_aligned = false;
    1681             :                 }
    1682             : 
    1683             :                 /* If we fail to build the request or the metadata, do not return the -EFAULT back up
    1684             :                  * the stack.  This ensures that we always fail these types of requests via a
    1685             :                  * completion callback, and never in the context of the submission.
    1686             :                  */
    1687           0 :                 rc = g_nvme_pcie_build_req_table[payload_type][sgl_supported](qpair, req, tr, dword_aligned);
    1688           0 :                 if (rc < 0) {
    1689           0 :                         assert(rc == -EFAULT);
    1690           0 :                         rc = 0;
    1691           0 :                         goto exit;
    1692             :                 }
    1693             : 
    1694           0 :                 rc = nvme_pcie_qpair_build_metadata(qpair, tr, sgl_supported, mptr_sgl_supported, dword_aligned);
    1695           0 :                 if (rc < 0) {
    1696           0 :                         assert(rc == -EFAULT);
    1697           0 :                         rc = 0;
    1698           0 :                         goto exit;
    1699             :                 }
    1700             :         }
    1701             : 
    1702           0 :         nvme_pcie_qpair_submit_tracker(qpair, tr);
    1703             : 
    1704           0 : exit:
    1705           0 :         if (spdk_unlikely(nvme_qpair_is_admin_queue(qpair))) {
    1706           0 :                 nvme_ctrlr_unlock(ctrlr);
    1707             :         }
    1708             : 
    1709           0 :         return rc;
    1710             : }
    1711             : 
    1712             : struct spdk_nvme_transport_poll_group *
    1713           1 : nvme_pcie_poll_group_create(void)
    1714             : {
    1715           1 :         struct nvme_pcie_poll_group *group = calloc(1, sizeof(*group));
    1716             : 
    1717           1 :         if (group == NULL) {
    1718           0 :                 SPDK_ERRLOG("Unable to allocate poll group.\n");
    1719           0 :                 return NULL;
    1720             :         }
    1721             : 
    1722           1 :         return &group->group;
    1723             : }
    1724             : 
    1725             : int
    1726           0 : nvme_pcie_poll_group_connect_qpair(struct spdk_nvme_qpair *qpair)
    1727             : {
    1728           0 :         return 0;
    1729             : }
    1730             : 
    1731             : int
    1732           0 : nvme_pcie_poll_group_disconnect_qpair(struct spdk_nvme_qpair *qpair)
    1733             : {
    1734           0 :         return 0;
    1735             : }
    1736             : 
    1737             : int
    1738           0 : nvme_pcie_poll_group_add(struct spdk_nvme_transport_poll_group *tgroup,
    1739             :                          struct spdk_nvme_qpair *qpair)
    1740             : {
    1741           0 :         return 0;
    1742             : }
    1743             : 
    1744             : int
    1745           0 : nvme_pcie_poll_group_remove(struct spdk_nvme_transport_poll_group *tgroup,
    1746             :                             struct spdk_nvme_qpair *qpair)
    1747             : {
    1748           0 :         struct nvme_pcie_qpair *pqpair = nvme_pcie_qpair(qpair);
    1749             : 
    1750           0 :         pqpair->stat = &g_dummy_stat;
    1751           0 :         return 0;
    1752             : }
    1753             : 
    1754             : int64_t
    1755           0 : nvme_pcie_poll_group_process_completions(struct spdk_nvme_transport_poll_group *tgroup,
    1756             :                 uint32_t completions_per_qpair, spdk_nvme_disconnected_qpair_cb disconnected_qpair_cb)
    1757             : {
    1758             :         struct spdk_nvme_qpair *qpair, *tmp_qpair;
    1759           0 :         int32_t local_completions = 0;
    1760           0 :         int64_t total_completions = 0;
    1761             : 
    1762           0 :         STAILQ_FOREACH_SAFE(qpair, &tgroup->disconnected_qpairs, poll_group_stailq, tmp_qpair) {
    1763           0 :                 disconnected_qpair_cb(qpair, tgroup->group->ctx);
    1764             :         }
    1765             : 
    1766           0 :         STAILQ_FOREACH_SAFE(qpair, &tgroup->connected_qpairs, poll_group_stailq, tmp_qpair) {
    1767           0 :                 local_completions = spdk_nvme_qpair_process_completions(qpair, completions_per_qpair);
    1768           0 :                 if (spdk_unlikely(local_completions < 0)) {
    1769           0 :                         disconnected_qpair_cb(qpair, tgroup->group->ctx);
    1770           0 :                         total_completions = -ENXIO;
    1771           0 :                 } else if (spdk_likely(total_completions >= 0)) {
    1772           0 :                         total_completions += local_completions;
    1773             :                 }
    1774             :         }
    1775             : 
    1776           0 :         return total_completions;
    1777             : }
    1778             : 
    1779             : int
    1780           1 : nvme_pcie_poll_group_destroy(struct spdk_nvme_transport_poll_group *tgroup)
    1781             : {
    1782           1 :         if (!STAILQ_EMPTY(&tgroup->connected_qpairs) || !STAILQ_EMPTY(&tgroup->disconnected_qpairs)) {
    1783           0 :                 return -EBUSY;
    1784             :         }
    1785             : 
    1786           1 :         free(tgroup);
    1787             : 
    1788           1 :         return 0;
    1789             : }
    1790             : 
    1791             : int
    1792           3 : nvme_pcie_poll_group_get_stats(struct spdk_nvme_transport_poll_group *tgroup,
    1793             :                                struct spdk_nvme_transport_poll_group_stat **_stats)
    1794             : {
    1795             :         struct nvme_pcie_poll_group *group;
    1796             :         struct spdk_nvme_transport_poll_group_stat *stats;
    1797             : 
    1798           3 :         if (tgroup == NULL || _stats == NULL) {
    1799           2 :                 SPDK_ERRLOG("Invalid stats or group pointer\n");
    1800           2 :                 return -EINVAL;
    1801             :         }
    1802             : 
    1803           1 :         stats = calloc(1, sizeof(*stats));
    1804           1 :         if (!stats) {
    1805           0 :                 SPDK_ERRLOG("Can't allocate memory for stats\n");
    1806           0 :                 return -ENOMEM;
    1807             :         }
    1808           1 :         stats->trtype = SPDK_NVME_TRANSPORT_PCIE;
    1809           1 :         group = SPDK_CONTAINEROF(tgroup, struct nvme_pcie_poll_group, group);
    1810           1 :         memcpy(&stats->pcie, &group->stats, sizeof(group->stats));
    1811             : 
    1812           1 :         *_stats = stats;
    1813             : 
    1814           1 :         return 0;
    1815             : }
    1816             : 
    1817             : void
    1818           1 : nvme_pcie_poll_group_free_stats(struct spdk_nvme_transport_poll_group *tgroup,
    1819             :                                 struct spdk_nvme_transport_poll_group_stat *stats)
    1820             : {
    1821           1 :         free(stats);
    1822           1 : }
    1823             : 
    1824           2 : SPDK_TRACE_REGISTER_FN(nvme_pcie, "nvme_pcie", TRACE_GROUP_NVME_PCIE)
    1825             : {
    1826           0 :         struct spdk_trace_tpoint_opts opts[] = {
    1827             :                 {
    1828             :                         "NVME_PCIE_SUBMIT", TRACE_NVME_PCIE_SUBMIT,
    1829             :                         OWNER_TYPE_NVME_PCIE_QP, OBJECT_NVME_PCIE_REQ, 1,
    1830             :                         {       { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
    1831             :                                 { "cid", SPDK_TRACE_ARG_TYPE_INT, 4 },
    1832             :                                 { "opc", SPDK_TRACE_ARG_TYPE_INT, 4 },
    1833             :                                 { "dw10", SPDK_TRACE_ARG_TYPE_PTR, 4 },
    1834             :                                 { "dw11", SPDK_TRACE_ARG_TYPE_PTR, 4 },
    1835             :                                 { "dw12", SPDK_TRACE_ARG_TYPE_PTR, 4 },
    1836             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
    1837             :                         }
    1838             :                 },
    1839             :                 {
    1840             :                         "NVME_PCIE_COMPLETE", TRACE_NVME_PCIE_COMPLETE,
    1841             :                         OWNER_TYPE_NVME_PCIE_QP, OBJECT_NVME_PCIE_REQ, 0,
    1842             :                         {       { "ctx", SPDK_TRACE_ARG_TYPE_PTR, 8 },
    1843             :                                 { "cid", SPDK_TRACE_ARG_TYPE_INT, 4 },
    1844             :                                 { "cpl", SPDK_TRACE_ARG_TYPE_PTR, 4 },
    1845             :                                 { "qd", SPDK_TRACE_ARG_TYPE_INT, 4 }
    1846             :                         }
    1847             :                 },
    1848             :         };
    1849             : 
    1850           0 :         spdk_trace_register_object(OBJECT_NVME_PCIE_REQ, 'p');
    1851           0 :         spdk_trace_register_owner_type(OWNER_TYPE_NVME_PCIE_QP, 'q');
    1852           0 :         spdk_trace_register_description_ext(opts, SPDK_COUNTOF(opts));
    1853           0 : }

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