LCOV - code coverage report
Current view: top level - module/accel/dsa - accel_dsa.c (source / functions) Hit Total Coverage
Test: ut_cov_unit.info Lines: 0 241 0.0 %
Date: 2024-07-15 07:52:55 Functions: 0 23 0.0 %

          Line data    Source code
       1             : /*   SPDX-License-Identifier: BSD-3-Clause
       2             :  *   Copyright (C) 2022 Intel Corporation.
       3             :  *   Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
       4             :  *   All rights reserved.
       5             :  */
       6             : 
       7             : #include "accel_dsa.h"
       8             : 
       9             : #include "spdk/stdinc.h"
      10             : 
      11             : #include "spdk/accel_module.h"
      12             : #include "spdk/log.h"
      13             : #include "spdk_internal/idxd.h"
      14             : 
      15             : #include "spdk/env.h"
      16             : #include "spdk/event.h"
      17             : #include "spdk/likely.h"
      18             : #include "spdk/thread.h"
      19             : #include "spdk/idxd.h"
      20             : #include "spdk/util.h"
      21             : #include "spdk/json.h"
      22             : #include "spdk/trace.h"
      23             : #include "spdk_internal/trace_defs.h"
      24             : 
      25             : static bool g_dsa_enable = false;
      26             : static bool g_kernel_mode = false;
      27             : 
      28             : enum channel_state {
      29             :         IDXD_CHANNEL_ACTIVE,
      30             :         IDXD_CHANNEL_ERROR,
      31             : };
      32             : 
      33             : static bool g_dsa_initialized = false;
      34             : 
      35             : struct idxd_device {
      36             :         struct                          spdk_idxd_device *dsa;
      37             :         TAILQ_ENTRY(idxd_device)        tailq;
      38             : };
      39             : static TAILQ_HEAD(, idxd_device) g_dsa_devices = TAILQ_HEAD_INITIALIZER(g_dsa_devices);
      40             : static struct idxd_device *g_next_dev = NULL;
      41             : static uint32_t g_num_devices = 0;
      42             : static pthread_mutex_t g_dev_lock = PTHREAD_MUTEX_INITIALIZER;
      43             : 
      44             : struct idxd_task {
      45             :         struct spdk_accel_task  task;
      46             :         struct idxd_io_channel  *chan;
      47             : };
      48             : 
      49             : struct idxd_io_channel {
      50             :         struct spdk_idxd_io_channel     *chan;
      51             :         struct idxd_device              *dev;
      52             :         enum channel_state              state;
      53             :         struct spdk_poller              *poller;
      54             :         uint32_t                        num_outstanding;
      55             :         STAILQ_HEAD(, spdk_accel_task)  queued_tasks;
      56             : };
      57             : 
      58             : static struct spdk_io_channel *dsa_get_io_channel(void);
      59             : 
      60             : static struct idxd_device *
      61           0 : idxd_select_device(struct idxd_io_channel *chan)
      62             : {
      63           0 :         uint32_t count = 0;
      64             :         struct idxd_device *dev;
      65           0 :         uint32_t socket_id = spdk_env_get_socket_id(spdk_env_get_current_core());
      66             : 
      67             :         /*
      68             :          * We allow channels to share underlying devices,
      69             :          * selection is round-robin based with a limitation
      70             :          * on how many channel can share one device.
      71             :          */
      72             :         do {
      73             :                 /* select next device */
      74           0 :                 pthread_mutex_lock(&g_dev_lock);
      75           0 :                 g_next_dev = TAILQ_NEXT(g_next_dev, tailq);
      76           0 :                 if (g_next_dev == NULL) {
      77           0 :                         g_next_dev = TAILQ_FIRST(&g_dsa_devices);
      78             :                 }
      79           0 :                 dev = g_next_dev;
      80           0 :                 pthread_mutex_unlock(&g_dev_lock);
      81             : 
      82           0 :                 if (socket_id != spdk_idxd_get_socket(dev->dsa)) {
      83           0 :                         continue;
      84             :                 }
      85             : 
      86             :                 /*
      87             :                  * Now see if a channel is available on this one. We only
      88             :                  * allow a specific number of channels to share a device
      89             :                  * to limit outstanding IO for flow control purposes.
      90             :                  */
      91           0 :                 chan->chan = spdk_idxd_get_channel(dev->dsa);
      92           0 :                 if (chan->chan != NULL) {
      93           0 :                         SPDK_DEBUGLOG(accel_dsa, "On socket %d using device on socket %d\n",
      94             :                                       socket_id, spdk_idxd_get_socket(dev->dsa));
      95           0 :                         return dev;
      96             :                 }
      97           0 :         } while (++count < g_num_devices);
      98             : 
      99             :         /* We are out of available channels and/or devices for the local socket. We fix the number
     100             :          * of channels that we allocate per device and only allocate devices on the same socket
     101             :          * that the current thread is on. If on a 2 socket system it may be possible to avoid
     102             :          * this situation by spreading threads across the sockets.
     103             :          */
     104           0 :         SPDK_ERRLOG("No more DSA devices available on the local socket.\n");
     105           0 :         return NULL;
     106             : }
     107             : 
     108             : static void
     109           0 : dsa_done(void *cb_arg, int status)
     110             : {
     111           0 :         struct idxd_task *idxd_task = cb_arg;
     112             :         struct idxd_io_channel *chan;
     113             :         int rc;
     114             : 
     115           0 :         chan = idxd_task->chan;
     116             : 
     117             :         /* If the DSA DIF Check operation detects an error, detailed info about
     118             :          * this error (like actual/expected values) needs to be obtained by
     119             :          * calling the software DIF Verify operation.
     120             :          */
     121           0 :         if (spdk_unlikely(status == -EIO)) {
     122           0 :                 if (idxd_task->task.op_code == SPDK_ACCEL_OPC_DIF_VERIFY ||
     123           0 :                     idxd_task->task.op_code == SPDK_ACCEL_OPC_DIF_VERIFY_COPY) {
     124           0 :                         rc = spdk_dif_verify(idxd_task->task.s.iovs, idxd_task->task.s.iovcnt,
     125             :                                              idxd_task->task.dif.num_blocks,
     126             :                                              idxd_task->task.dif.ctx, idxd_task->task.dif.err);
     127           0 :                         if (rc != 0) {
     128           0 :                                 SPDK_ERRLOG("DIF error detected. type=%d, offset=%" PRIu32 "\n",
     129             :                                             idxd_task->task.dif.err->err_type,
     130             :                                             idxd_task->task.dif.err->err_offset);
     131             :                         }
     132             :                 }
     133             :         }
     134             : 
     135           0 :         assert(chan->num_outstanding > 0);
     136           0 :         spdk_trace_record(TRACE_ACCEL_DSA_OP_COMPLETE, 0, 0, 0, chan->num_outstanding - 1);
     137           0 :         chan->num_outstanding--;
     138             : 
     139           0 :         spdk_accel_task_complete(&idxd_task->task, status);
     140           0 : }
     141             : 
     142             : static int
     143           0 : idxd_submit_dualcast(struct idxd_io_channel *ch, struct idxd_task *idxd_task, int flags)
     144             : {
     145           0 :         struct spdk_accel_task *task = &idxd_task->task;
     146             : 
     147           0 :         if (spdk_unlikely(task->d.iovcnt != 1 || task->d2.iovcnt != 1 || task->s.iovcnt != 1)) {
     148           0 :                 return -EINVAL;
     149             :         }
     150             : 
     151           0 :         if (spdk_unlikely(task->d.iovs[0].iov_len != task->s.iovs[0].iov_len ||
     152             :                           task->d.iovs[0].iov_len != task->d2.iovs[0].iov_len)) {
     153           0 :                 return -EINVAL;
     154             :         }
     155             : 
     156           0 :         return spdk_idxd_submit_dualcast(ch->chan, task->d.iovs[0].iov_base,
     157           0 :                                          task->d2.iovs[0].iov_base, task->s.iovs[0].iov_base,
     158           0 :                                          task->d.iovs[0].iov_len, flags, dsa_done, idxd_task);
     159             : }
     160             : 
     161             : static int
     162           0 : check_dsa_dif_strip_overlap_bufs(struct spdk_accel_task *task)
     163             : {
     164             :         uint64_t src_seg_addr_end_ext;
     165             :         uint64_t dst_seg_addr_end_ext;
     166             :         size_t i;
     167             : 
     168             :         /* The number of source and destination iovecs must be the same.
     169             :          * If so, one of them can be used to iterate over both vectors
     170             :          * later in the loop. */
     171           0 :         if (task->d.iovcnt != task->s.iovcnt) {
     172           0 :                 SPDK_ERRLOG("Mismatched iovcnts: src=%d, dst=%d\n",
     173             :                             task->s.iovcnt, task->d.iovcnt);
     174           0 :                 return -EINVAL;
     175             :         }
     176             : 
     177           0 :         for (i = 0; i < task->s.iovcnt; i++) {
     178           0 :                 src_seg_addr_end_ext = (uint64_t)task->s.iovs[i].iov_base +
     179           0 :                                        task->s.iovs[i].iov_len;
     180             : 
     181           0 :                 dst_seg_addr_end_ext = (uint64_t)task->d.iovs[i].iov_base +
     182           0 :                                        task->s.iovs[i].iov_len;
     183             : 
     184           0 :                 if ((dst_seg_addr_end_ext >= (uint64_t)task->s.iovs[i].iov_base) &&
     185             :                     (dst_seg_addr_end_ext <= src_seg_addr_end_ext)) {
     186           0 :                         return -EFAULT;
     187             :                 }
     188             :         }
     189             : 
     190           0 :         return 0;
     191             : }
     192             : 
     193             : static void
     194           0 : spdk_accel_sw_task_complete(void *ctx)
     195             : {
     196           0 :         struct spdk_accel_task *task = (struct spdk_accel_task *)ctx;
     197             : 
     198           0 :         spdk_accel_task_complete(task, task->status);
     199           0 : }
     200             : 
     201             : static int
     202           0 : _process_single_task(struct spdk_io_channel *ch, struct spdk_accel_task *task)
     203             : {
     204           0 :         struct idxd_io_channel *chan = spdk_io_channel_get_ctx(ch);
     205             :         struct idxd_task *idxd_task;
     206           0 :         int rc = 0, flags = 0;
     207             : 
     208           0 :         idxd_task = SPDK_CONTAINEROF(task, struct idxd_task, task);
     209           0 :         idxd_task->chan = chan;
     210             : 
     211           0 :         switch (task->op_code) {
     212           0 :         case SPDK_ACCEL_OPC_COPY:
     213           0 :                 rc = spdk_idxd_submit_copy(chan->chan, task->d.iovs, task->d.iovcnt,
     214             :                                            task->s.iovs, task->s.iovcnt, flags, dsa_done, idxd_task);
     215           0 :                 break;
     216           0 :         case SPDK_ACCEL_OPC_DUALCAST:
     217           0 :                 rc = idxd_submit_dualcast(chan, idxd_task, flags);
     218           0 :                 break;
     219           0 :         case SPDK_ACCEL_OPC_COMPARE:
     220           0 :                 rc = spdk_idxd_submit_compare(chan->chan, task->s.iovs, task->s.iovcnt,
     221           0 :                                               task->s2.iovs, task->s2.iovcnt, flags,
     222             :                                               dsa_done, idxd_task);
     223           0 :                 break;
     224           0 :         case SPDK_ACCEL_OPC_FILL:
     225           0 :                 rc = spdk_idxd_submit_fill(chan->chan, task->d.iovs, task->d.iovcnt,
     226             :                                            task->fill_pattern, flags, dsa_done, idxd_task);
     227           0 :                 break;
     228           0 :         case SPDK_ACCEL_OPC_CRC32C:
     229           0 :                 rc = spdk_idxd_submit_crc32c(chan->chan, task->s.iovs, task->s.iovcnt, task->seed,
     230             :                                              task->crc_dst, flags, dsa_done, idxd_task);
     231           0 :                 break;
     232           0 :         case SPDK_ACCEL_OPC_COPY_CRC32C:
     233           0 :                 rc = spdk_idxd_submit_copy_crc32c(chan->chan, task->d.iovs, task->d.iovcnt,
     234           0 :                                                   task->s.iovs, task->s.iovcnt,
     235             :                                                   task->seed, task->crc_dst, flags,
     236             :                                                   dsa_done, idxd_task);
     237           0 :                 break;
     238           0 :         case SPDK_ACCEL_OPC_DIF_VERIFY:
     239           0 :                 rc = spdk_idxd_submit_dif_check(chan->chan,
     240           0 :                                                 task->s.iovs, task->s.iovcnt,
     241             :                                                 task->dif.num_blocks, task->dif.ctx, flags,
     242             :                                                 dsa_done, idxd_task);
     243           0 :                 break;
     244           0 :         case SPDK_ACCEL_OPC_DIF_GENERATE_COPY:
     245           0 :                 rc = spdk_idxd_submit_dif_insert(chan->chan,
     246           0 :                                                  task->d.iovs, task->d.iovcnt,
     247           0 :                                                  task->s.iovs, task->s.iovcnt,
     248             :                                                  task->dif.num_blocks, task->dif.ctx, flags,
     249             :                                                  dsa_done, idxd_task);
     250           0 :                 break;
     251           0 :         case SPDK_ACCEL_OPC_DIF_VERIFY_COPY:
     252             :                 /* For DIF strip operations, DSA may incorrectly report an overlapping buffer
     253             :                  * error if the destination buffer immediately precedes the source buffer.
     254             :                  * This is because DSA uses the transfer size in the descriptor for both
     255             :                  * the source and destination buffers when checking for buffer overlap.
     256             :                  * Since the transfer size applies to the source buffer, which is larger
     257             :                  * than the destination buffer by metadata, it should not be used as
     258             :                  * the destination buffer size. To avoid reporting errors by DSA, the software
     259             :                  * checks whether such an error condition can occur, and if so the software
     260             :                  * fallback is performed. */
     261           0 :                 rc = check_dsa_dif_strip_overlap_bufs(task);
     262           0 :                 if (rc == 0) {
     263           0 :                         rc = spdk_idxd_submit_dif_strip(chan->chan,
     264           0 :                                                         task->d.iovs, task->d.iovcnt,
     265           0 :                                                         task->s.iovs, task->s.iovcnt,
     266             :                                                         task->dif.num_blocks, task->dif.ctx, flags,
     267             :                                                         dsa_done, idxd_task);
     268           0 :                 } else if (rc == -EFAULT) {
     269           0 :                         rc = spdk_dif_verify_copy(task->d.iovs,
     270           0 :                                                   task->d.iovcnt,
     271             :                                                   task->s.iovs,
     272           0 :                                                   task->s.iovcnt,
     273             :                                                   task->dif.num_blocks,
     274             :                                                   task->dif.ctx,
     275             :                                                   task->dif.err);
     276           0 :                         idxd_task->task.status = rc;
     277           0 :                         spdk_thread_send_msg(spdk_get_thread(), spdk_accel_sw_task_complete, (void *)&idxd_task->task);
     278           0 :                         rc = 0;
     279             :                 }
     280           0 :                 break;
     281           0 :         default:
     282           0 :                 assert(false);
     283             :                 rc = -EINVAL;
     284             :                 break;
     285             :         }
     286             : 
     287           0 :         if (rc == 0) {
     288           0 :                 chan->num_outstanding++;
     289           0 :                 spdk_trace_record(TRACE_ACCEL_DSA_OP_SUBMIT, 0, 0, 0, chan->num_outstanding);
     290             :         }
     291             : 
     292           0 :         return rc;
     293             : }
     294             : 
     295             : static int
     296           0 : dsa_submit_task(struct spdk_io_channel *ch, struct spdk_accel_task *task)
     297             : {
     298           0 :         struct idxd_io_channel *chan = spdk_io_channel_get_ctx(ch);
     299           0 :         int rc = 0;
     300             : 
     301           0 :         assert(STAILQ_NEXT(task, link) == NULL);
     302             : 
     303           0 :         if (spdk_unlikely(chan->state == IDXD_CHANNEL_ERROR)) {
     304           0 :                 spdk_accel_task_complete(task, -EINVAL);
     305           0 :                 return 0;
     306             :         }
     307             : 
     308           0 :         if (!STAILQ_EMPTY(&chan->queued_tasks)) {
     309           0 :                 STAILQ_INSERT_TAIL(&chan->queued_tasks, task, link);
     310           0 :                 return 0;
     311             :         }
     312             : 
     313           0 :         rc = _process_single_task(ch, task);
     314           0 :         if (rc == -EBUSY) {
     315           0 :                 STAILQ_INSERT_TAIL(&chan->queued_tasks, task, link);
     316           0 :         } else if (rc) {
     317           0 :                 spdk_accel_task_complete(task, rc);
     318             :         }
     319             : 
     320           0 :         return 0;
     321             : }
     322             : 
     323             : static int
     324           0 : dsa_submit_queued_tasks(struct idxd_io_channel *chan)
     325             : {
     326             :         struct spdk_accel_task *task, *tmp;
     327           0 :         struct spdk_io_channel *ch = spdk_io_channel_from_ctx(chan);
     328           0 :         int rc = 0;
     329             : 
     330           0 :         if (spdk_unlikely(chan->state == IDXD_CHANNEL_ERROR)) {
     331             :                 /* Complete queued tasks with error and clear the list */
     332           0 :                 while ((task = STAILQ_FIRST(&chan->queued_tasks))) {
     333           0 :                         STAILQ_REMOVE_HEAD(&chan->queued_tasks, link);
     334           0 :                         spdk_accel_task_complete(task, -EINVAL);
     335             :                 }
     336           0 :                 return 0;
     337             :         }
     338             : 
     339           0 :         STAILQ_FOREACH_SAFE(task, &chan->queued_tasks, link, tmp) {
     340           0 :                 rc = _process_single_task(ch, task);
     341           0 :                 if (rc == -EBUSY) {
     342           0 :                         return rc;
     343             :                 }
     344           0 :                 STAILQ_REMOVE_HEAD(&chan->queued_tasks, link);
     345           0 :                 if (rc) {
     346           0 :                         spdk_accel_task_complete(task, rc);
     347             :                 }
     348             :         }
     349             : 
     350           0 :         return 0;
     351             : }
     352             : 
     353             : static int
     354           0 : idxd_poll(void *arg)
     355             : {
     356           0 :         struct idxd_io_channel *chan = arg;
     357             :         int count;
     358             : 
     359           0 :         count = spdk_idxd_process_events(chan->chan);
     360             : 
     361             :         /* Check if there are any pending ops to process if the channel is active */
     362           0 :         if (!STAILQ_EMPTY(&chan->queued_tasks)) {
     363           0 :                 dsa_submit_queued_tasks(chan);
     364             :         }
     365             : 
     366           0 :         return count > 0 ? SPDK_POLLER_BUSY : SPDK_POLLER_IDLE;
     367             : }
     368             : 
     369             : static size_t
     370           0 : accel_dsa_get_ctx_size(void)
     371             : {
     372           0 :         return sizeof(struct idxd_task);
     373             : }
     374             : 
     375             : static bool
     376           0 : dsa_supports_opcode(enum spdk_accel_opcode opc)
     377             : {
     378           0 :         if (!g_dsa_initialized) {
     379           0 :                 assert(0);
     380             :                 return false;
     381             :         }
     382             : 
     383           0 :         switch (opc) {
     384           0 :         case SPDK_ACCEL_OPC_COPY:
     385             :         case SPDK_ACCEL_OPC_FILL:
     386             :         case SPDK_ACCEL_OPC_DUALCAST:
     387             :         case SPDK_ACCEL_OPC_COMPARE:
     388             :         case SPDK_ACCEL_OPC_CRC32C:
     389             :         case SPDK_ACCEL_OPC_COPY_CRC32C:
     390           0 :                 return true;
     391           0 :         case SPDK_ACCEL_OPC_DIF_VERIFY:
     392             :         case SPDK_ACCEL_OPC_DIF_GENERATE_COPY:
     393             :         case SPDK_ACCEL_OPC_DIF_VERIFY_COPY:
     394             :                 /* Supported only if the IOMMU is enabled */
     395           0 :                 return spdk_iommu_is_enabled();
     396           0 :         default:
     397           0 :                 return false;
     398             :         }
     399             : }
     400             : 
     401             : static int accel_dsa_init(void);
     402             : static void accel_dsa_exit(void *ctx);
     403             : static void accel_dsa_write_config_json(struct spdk_json_write_ctx *w);
     404             : 
     405             : static struct spdk_accel_module_if g_dsa_module = {
     406             :         .module_init = accel_dsa_init,
     407             :         .module_fini = accel_dsa_exit,
     408             :         .write_config_json = accel_dsa_write_config_json,
     409             :         .get_ctx_size = accel_dsa_get_ctx_size,
     410             :         .name                   = "dsa",
     411             :         .supports_opcode        = dsa_supports_opcode,
     412             :         .get_io_channel         = dsa_get_io_channel,
     413             :         .submit_tasks           = dsa_submit_task
     414             : };
     415             : 
     416             : static int
     417           0 : dsa_create_cb(void *io_device, void *ctx_buf)
     418             : {
     419           0 :         struct idxd_io_channel *chan = ctx_buf;
     420             :         struct idxd_device *dsa;
     421             : 
     422           0 :         dsa = idxd_select_device(chan);
     423           0 :         if (dsa == NULL) {
     424           0 :                 SPDK_ERRLOG("Failed to get an idxd channel\n");
     425           0 :                 return -EINVAL;
     426             :         }
     427             : 
     428           0 :         chan->dev = dsa;
     429           0 :         chan->poller = SPDK_POLLER_REGISTER(idxd_poll, chan, 0);
     430           0 :         STAILQ_INIT(&chan->queued_tasks);
     431           0 :         chan->num_outstanding = 0;
     432           0 :         chan->state = IDXD_CHANNEL_ACTIVE;
     433             : 
     434           0 :         return 0;
     435             : }
     436             : 
     437             : static void
     438           0 : dsa_destroy_cb(void *io_device, void *ctx_buf)
     439             : {
     440           0 :         struct idxd_io_channel *chan = ctx_buf;
     441             : 
     442           0 :         spdk_poller_unregister(&chan->poller);
     443           0 :         spdk_idxd_put_channel(chan->chan);
     444           0 : }
     445             : 
     446             : static struct spdk_io_channel *
     447           0 : dsa_get_io_channel(void)
     448             : {
     449           0 :         return spdk_get_io_channel(&g_dsa_module);
     450             : }
     451             : 
     452             : static void
     453           0 : attach_cb(void *cb_ctx, struct spdk_idxd_device *idxd)
     454             : {
     455             :         struct idxd_device *dev;
     456             : 
     457           0 :         dev = calloc(1, sizeof(*dev));
     458           0 :         if (dev == NULL) {
     459           0 :                 SPDK_ERRLOG("Failed to allocate device struct\n");
     460           0 :                 return;
     461             :         }
     462             : 
     463           0 :         dev->dsa = idxd;
     464           0 :         if (g_next_dev == NULL) {
     465           0 :                 g_next_dev = dev;
     466             :         }
     467             : 
     468           0 :         TAILQ_INSERT_TAIL(&g_dsa_devices, dev, tailq);
     469           0 :         g_num_devices++;
     470             : }
     471             : 
     472             : int
     473           0 : accel_dsa_enable_probe(bool kernel_mode)
     474             : {
     475             :         int rc;
     476             : 
     477           0 :         if (g_dsa_enable) {
     478           0 :                 return -EALREADY;
     479             :         }
     480             : 
     481           0 :         rc = spdk_idxd_set_config(kernel_mode);
     482           0 :         if (rc != 0) {
     483           0 :                 return rc;
     484             :         }
     485             : 
     486           0 :         spdk_accel_module_list_add(&g_dsa_module);
     487           0 :         g_kernel_mode = kernel_mode;
     488           0 :         g_dsa_enable = true;
     489             : 
     490           0 :         return 0;
     491             : }
     492             : 
     493             : static bool
     494           0 : probe_cb(void *cb_ctx, struct spdk_pci_device *dev)
     495             : {
     496           0 :         if (dev->id.device_id == PCI_DEVICE_ID_INTEL_DSA) {
     497           0 :                 return true;
     498             :         }
     499             : 
     500           0 :         return false;
     501             : }
     502             : 
     503             : static int
     504           0 : accel_dsa_init(void)
     505             : {
     506           0 :         if (!g_dsa_enable) {
     507           0 :                 return -EINVAL;
     508             :         }
     509             : 
     510           0 :         if (spdk_idxd_probe(NULL, attach_cb, probe_cb) != 0) {
     511           0 :                 SPDK_ERRLOG("spdk_idxd_probe() failed\n");
     512           0 :                 return -EINVAL;
     513             :         }
     514             : 
     515           0 :         if (TAILQ_EMPTY(&g_dsa_devices)) {
     516           0 :                 return -ENODEV;
     517             :         }
     518             : 
     519           0 :         g_dsa_initialized = true;
     520           0 :         spdk_io_device_register(&g_dsa_module, dsa_create_cb, dsa_destroy_cb,
     521             :                                 sizeof(struct idxd_io_channel), "dsa_accel_module");
     522           0 :         return 0;
     523             : }
     524             : 
     525             : static void
     526           0 : accel_dsa_exit(void *ctx)
     527             : {
     528             :         struct idxd_device *dev;
     529             : 
     530           0 :         if (g_dsa_initialized) {
     531           0 :                 spdk_io_device_unregister(&g_dsa_module, NULL);
     532           0 :                 g_dsa_initialized = false;
     533             :         }
     534             : 
     535           0 :         while (!TAILQ_EMPTY(&g_dsa_devices)) {
     536           0 :                 dev = TAILQ_FIRST(&g_dsa_devices);
     537           0 :                 TAILQ_REMOVE(&g_dsa_devices, dev, tailq);
     538           0 :                 spdk_idxd_detach(dev->dsa);
     539           0 :                 free(dev);
     540             :         }
     541             : 
     542           0 :         spdk_accel_module_finish();
     543           0 : }
     544             : 
     545             : static void
     546           0 : accel_dsa_write_config_json(struct spdk_json_write_ctx *w)
     547             : {
     548           0 :         if (g_dsa_enable) {
     549           0 :                 spdk_json_write_object_begin(w);
     550           0 :                 spdk_json_write_named_string(w, "method", "dsa_scan_accel_module");
     551           0 :                 spdk_json_write_named_object_begin(w, "params");
     552           0 :                 spdk_json_write_named_bool(w, "config_kernel_mode", g_kernel_mode);
     553           0 :                 spdk_json_write_object_end(w);
     554           0 :                 spdk_json_write_object_end(w);
     555             :         }
     556           0 : }
     557             : 
     558           0 : SPDK_TRACE_REGISTER_FN(dsa_trace, "dsa", TRACE_GROUP_ACCEL_DSA)
     559             : {
     560           0 :         spdk_trace_register_description("DSA_OP_SUBMIT", TRACE_ACCEL_DSA_OP_SUBMIT, OWNER_TYPE_NONE,
     561             :                                         OBJECT_NONE, 0,
     562             :                                         SPDK_TRACE_ARG_TYPE_INT, "count");
     563           0 :         spdk_trace_register_description("DSA_OP_COMPLETE", TRACE_ACCEL_DSA_OP_COMPLETE, OWNER_TYPE_NONE,
     564             :                                         OBJECT_NONE,
     565             :                                         0, SPDK_TRACE_ARG_TYPE_INT, "count");
     566           0 : }
     567             : 
     568           0 : SPDK_LOG_REGISTER_COMPONENT(accel_dsa)

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