1 /*-
2 * Copyright (c) 2013-2017, Mellanox Technologies, Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: stable/10/sys/dev/mlx5/mlx5_core/mlx5_pagealloc.c 322151 2017-08-07 12:49:30Z hselasky $
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <dev/mlx5/driver.h>
32 #include "mlx5_core.h"
33
34 CTASSERT((uintptr_t)PAGE_MASK > (uintptr_t)PAGE_SIZE);
35
36 struct mlx5_pages_req {
37 struct mlx5_core_dev *dev;
38 u16 func_id;
39 s32 npages;
40 struct work_struct work;
41 };
42
43
44 struct mlx5_manage_pages_inbox {
45 struct mlx5_inbox_hdr hdr;
46 __be16 rsvd;
47 __be16 func_id;
48 __be32 num_entries;
49 __be64 pas[0];
50 };
51
52 struct mlx5_manage_pages_outbox {
53 struct mlx5_outbox_hdr hdr;
54 __be32 num_entries;
55 u8 rsvd[4];
56 __be64 pas[0];
57 };
58
59 enum {
60 MAX_RECLAIM_TIME_MSECS = 5000,
61 };
62
63 static void
mlx5_fwp_load_mem_cb(void * arg,bus_dma_segment_t * segs,int nseg,int error)64 mlx5_fwp_load_mem_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
65 {
66 struct mlx5_fw_page *fwp;
67 uint8_t owned;
68
69 fwp = (struct mlx5_fw_page *)arg;
70 owned = MLX5_DMA_OWNED(fwp->dev);
71
72 if (!owned)
73 MLX5_DMA_LOCK(fwp->dev);
74
75 if (error == 0) {
76 KASSERT(nseg == 1, ("Number of segments is different from 1"));
77 fwp->dma_addr = segs->ds_addr;
78 fwp->load_done = MLX5_LOAD_ST_SUCCESS;
79 } else {
80 fwp->load_done = MLX5_LOAD_ST_FAILURE;
81 }
82 MLX5_DMA_DONE(fwp->dev);
83
84 if (!owned)
85 MLX5_DMA_UNLOCK(fwp->dev);
86 }
87
88 void
mlx5_fwp_flush(struct mlx5_fw_page * fwp)89 mlx5_fwp_flush(struct mlx5_fw_page *fwp)
90 {
91 unsigned num = fwp->numpages;
92
93 while (num--)
94 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_PREWRITE);
95 }
96
97 void
mlx5_fwp_invalidate(struct mlx5_fw_page * fwp)98 mlx5_fwp_invalidate(struct mlx5_fw_page *fwp)
99 {
100 unsigned num = fwp->numpages;
101
102 while (num--) {
103 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_POSTREAD);
104 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_PREREAD);
105 }
106 }
107
108 struct mlx5_fw_page *
mlx5_fwp_alloc(struct mlx5_core_dev * dev,gfp_t flags,unsigned num)109 mlx5_fwp_alloc(struct mlx5_core_dev *dev, gfp_t flags, unsigned num)
110 {
111 struct mlx5_fw_page *fwp;
112 unsigned x;
113 int err;
114
115 /* check for special case */
116 if (num == 0) {
117 fwp = kzalloc(sizeof(*fwp), flags);
118 if (fwp != NULL)
119 fwp->dev = dev;
120 return (fwp);
121 }
122
123 /* we need sleeping context for this function */
124 if (flags & M_NOWAIT)
125 return (NULL);
126
127 fwp = kzalloc(sizeof(*fwp) * num, flags);
128
129 /* serialize loading the DMA map(s) */
130 sx_xlock(&dev->cmd.dma_sx);
131
132 for (x = 0; x != num; x++) {
133 /* store pointer to MLX5 core device */
134 fwp[x].dev = dev;
135 /* store number of pages left from the array */
136 fwp[x].numpages = num - x;
137
138 /* allocate memory */
139 err = bus_dmamem_alloc(dev->cmd.dma_tag, &fwp[x].virt_addr,
140 BUS_DMA_WAITOK | BUS_DMA_COHERENT, &fwp[x].dma_map);
141 if (err != 0)
142 goto failure;
143
144 /* load memory into DMA */
145 MLX5_DMA_LOCK(dev);
146 err = bus_dmamap_load(
147 dev->cmd.dma_tag, fwp[x].dma_map, fwp[x].virt_addr,
148 MLX5_ADAPTER_PAGE_SIZE, &mlx5_fwp_load_mem_cb,
149 fwp + x, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
150
151 while (fwp[x].load_done == MLX5_LOAD_ST_NONE)
152 MLX5_DMA_WAIT(dev);
153 MLX5_DMA_UNLOCK(dev);
154
155 /* check for error */
156 if (fwp[x].load_done != MLX5_LOAD_ST_SUCCESS) {
157 bus_dmamem_free(dev->cmd.dma_tag, fwp[x].virt_addr,
158 fwp[x].dma_map);
159 goto failure;
160 }
161 }
162 sx_xunlock(&dev->cmd.dma_sx);
163 return (fwp);
164
165 failure:
166 while (x--) {
167 bus_dmamap_unload(dev->cmd.dma_tag, fwp[x].dma_map);
168 bus_dmamem_free(dev->cmd.dma_tag, fwp[x].virt_addr, fwp[x].dma_map);
169 }
170 sx_xunlock(&dev->cmd.dma_sx);
171 return (NULL);
172 }
173
174 void
mlx5_fwp_free(struct mlx5_fw_page * fwp)175 mlx5_fwp_free(struct mlx5_fw_page *fwp)
176 {
177 struct mlx5_core_dev *dev;
178 unsigned num;
179
180 /* be NULL safe */
181 if (fwp == NULL)
182 return;
183
184 /* check for special case */
185 if (fwp->numpages == 0) {
186 kfree(fwp);
187 return;
188 }
189
190 num = fwp->numpages;
191 dev = fwp->dev;
192
193 while (num--) {
194 bus_dmamap_unload(dev->cmd.dma_tag, fwp[num].dma_map);
195 bus_dmamem_free(dev->cmd.dma_tag, fwp[num].virt_addr, fwp[num].dma_map);
196 }
197
198 kfree(fwp);
199 }
200
201 u64
mlx5_fwp_get_dma(struct mlx5_fw_page * fwp,size_t offset)202 mlx5_fwp_get_dma(struct mlx5_fw_page *fwp, size_t offset)
203 {
204 size_t index = (offset / MLX5_ADAPTER_PAGE_SIZE);
205 KASSERT(index < fwp->numpages, ("Invalid offset: %lld", (long long)offset));
206
207 return ((fwp + index)->dma_addr + (offset % MLX5_ADAPTER_PAGE_SIZE));
208 }
209
210 void *
mlx5_fwp_get_virt(struct mlx5_fw_page * fwp,size_t offset)211 mlx5_fwp_get_virt(struct mlx5_fw_page *fwp, size_t offset)
212 {
213 size_t index = (offset / MLX5_ADAPTER_PAGE_SIZE);
214 KASSERT(index < fwp->numpages, ("Invalid offset: %lld", (long long)offset));
215
216 return ((char *)(fwp + index)->virt_addr + (offset % MLX5_ADAPTER_PAGE_SIZE));
217 }
218
219 static int
mlx5_insert_fw_page_locked(struct mlx5_core_dev * dev,struct mlx5_fw_page * nfp)220 mlx5_insert_fw_page_locked(struct mlx5_core_dev *dev, struct mlx5_fw_page *nfp)
221 {
222 struct rb_root *root = &dev->priv.page_root;
223 struct rb_node **new = &root->rb_node;
224 struct rb_node *parent = NULL;
225 struct mlx5_fw_page *tfp;
226
227 while (*new) {
228 parent = *new;
229 tfp = rb_entry(parent, struct mlx5_fw_page, rb_node);
230 if (tfp->dma_addr < nfp->dma_addr)
231 new = &parent->rb_left;
232 else if (tfp->dma_addr > nfp->dma_addr)
233 new = &parent->rb_right;
234 else
235 return (-EEXIST);
236 }
237
238 rb_link_node(&nfp->rb_node, parent, new);
239 rb_insert_color(&nfp->rb_node, root);
240 return (0);
241 }
242
243 static struct mlx5_fw_page *
mlx5_remove_fw_page_locked(struct mlx5_core_dev * dev,bus_addr_t addr)244 mlx5_remove_fw_page_locked(struct mlx5_core_dev *dev, bus_addr_t addr)
245 {
246 struct rb_root *root = &dev->priv.page_root;
247 struct rb_node *tmp = root->rb_node;
248 struct mlx5_fw_page *result = NULL;
249 struct mlx5_fw_page *tfp;
250
251 while (tmp) {
252 tfp = rb_entry(tmp, struct mlx5_fw_page, rb_node);
253 if (tfp->dma_addr < addr) {
254 tmp = tmp->rb_left;
255 } else if (tfp->dma_addr > addr) {
256 tmp = tmp->rb_right;
257 } else {
258 rb_erase(&tfp->rb_node, &dev->priv.page_root);
259 result = tfp;
260 break;
261 }
262 }
263 return (result);
264 }
265
266 static int
alloc_4k(struct mlx5_core_dev * dev,u64 * addr,u16 func_id)267 alloc_4k(struct mlx5_core_dev *dev, u64 *addr, u16 func_id)
268 {
269 struct mlx5_fw_page *fwp;
270 int err;
271
272 fwp = mlx5_fwp_alloc(dev, GFP_KERNEL, 1);
273 if (fwp == NULL)
274 return (-ENOMEM);
275
276 fwp->func_id = func_id;
277
278 MLX5_DMA_LOCK(dev);
279 err = mlx5_insert_fw_page_locked(dev, fwp);
280 MLX5_DMA_UNLOCK(dev);
281
282 if (err != 0) {
283 mlx5_fwp_free(fwp);
284 } else {
285 /* make sure cached data is cleaned */
286 mlx5_fwp_invalidate(fwp);
287
288 /* store DMA address */
289 *addr = fwp->dma_addr;
290 }
291 return (err);
292 }
293
294 static void
free_4k(struct mlx5_core_dev * dev,u64 addr)295 free_4k(struct mlx5_core_dev *dev, u64 addr)
296 {
297 struct mlx5_fw_page *fwp;
298
299 MLX5_DMA_LOCK(dev);
300 fwp = mlx5_remove_fw_page_locked(dev, addr);
301 MLX5_DMA_UNLOCK(dev);
302
303 if (fwp == NULL) {
304 mlx5_core_warn(dev, "Cannot free 4K page at 0x%llx\n", (long long)addr);
305 return;
306 }
307 mlx5_fwp_free(fwp);
308 }
309
mlx5_cmd_query_pages(struct mlx5_core_dev * dev,u16 * func_id,s32 * npages,int boot)310 static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id,
311 s32 *npages, int boot)
312 {
313 u32 in[MLX5_ST_SZ_DW(query_pages_in)];
314 u32 out[MLX5_ST_SZ_DW(query_pages_out)];
315 int err;
316
317 memset(in, 0, sizeof(in));
318
319 MLX5_SET(query_pages_in, in, opcode, MLX5_CMD_OP_QUERY_PAGES);
320 MLX5_SET(query_pages_in, in, op_mod,
321 boot ? MLX5_BOOT_PAGES : MLX5_INIT_PAGES);
322
323 memset(out, 0, sizeof(out));
324 err = mlx5_cmd_exec_check_status(dev, in, sizeof(in), out, sizeof(out));
325 if (err)
326 return err;
327
328 *npages = MLX5_GET(query_pages_out, out, num_pages);
329 *func_id = MLX5_GET(query_pages_out, out, function_id);
330
331 return 0;
332 }
333
give_pages(struct mlx5_core_dev * dev,u16 func_id,int npages,int notify_fail)334 static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
335 int notify_fail)
336 {
337 struct mlx5_manage_pages_inbox *in;
338 struct mlx5_manage_pages_outbox out;
339 struct mlx5_manage_pages_inbox *nin;
340 int inlen;
341 u64 addr;
342 int err;
343 int i = 0;
344
345 inlen = sizeof(*in) + npages * sizeof(in->pas[0]);
346 in = mlx5_vzalloc(inlen);
347 if (!in) {
348 mlx5_core_warn(dev, "vzalloc failed %d\n", inlen);
349 err = -ENOMEM;
350 goto out_alloc;
351 }
352 memset(&out, 0, sizeof(out));
353
354 for (i = 0; i < npages; i++) {
355 err = alloc_4k(dev, &addr, func_id);
356 if (err)
357 goto out_alloc;
358 in->pas[i] = cpu_to_be64(addr);
359 }
360
361 in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
362 in->hdr.opmod = cpu_to_be16(MLX5_PAGES_GIVE);
363 in->func_id = cpu_to_be16(func_id);
364 in->num_entries = cpu_to_be32(npages);
365 err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out));
366 if (err) {
367 mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n",
368 func_id, npages, err);
369 goto out_alloc;
370 }
371 dev->priv.fw_pages += npages;
372 dev->priv.pages_per_func[func_id] += npages;
373
374 if (out.hdr.status) {
375 err = mlx5_cmd_status_to_err(&out.hdr);
376 if (err) {
377 mlx5_core_warn(dev, "func_id 0x%x, npages %d, status %d\n",
378 func_id, npages, out.hdr.status);
379 goto out_alloc;
380 }
381 }
382
383 mlx5_core_dbg(dev, "err %d\n", err);
384
385 goto out_free;
386
387 out_alloc:
388 if (notify_fail) {
389 nin = kzalloc(sizeof(*nin), GFP_KERNEL);
390 if (!nin)
391 goto out_4k;
392
393 memset(&out, 0, sizeof(out));
394 nin->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
395 nin->hdr.opmod = cpu_to_be16(MLX5_PAGES_CANT_GIVE);
396 nin->func_id = cpu_to_be16(func_id);
397 if (mlx5_cmd_exec(dev, nin, sizeof(*nin), &out, sizeof(out)))
398 mlx5_core_warn(dev, "page notify failed\n");
399 kfree(nin);
400 }
401
402 out_4k:
403 for (i--; i >= 0; i--)
404 free_4k(dev, be64_to_cpu(in->pas[i]));
405 out_free:
406 kvfree(in);
407 return err;
408 }
409
reclaim_pages(struct mlx5_core_dev * dev,u32 func_id,int npages,int * nclaimed)410 static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
411 int *nclaimed)
412 {
413 struct mlx5_manage_pages_inbox in;
414 struct mlx5_manage_pages_outbox *out;
415 int num_claimed;
416 int outlen;
417 u64 addr;
418 int err;
419 int i;
420
421 if (nclaimed)
422 *nclaimed = 0;
423
424 memset(&in, 0, sizeof(in));
425 outlen = sizeof(*out) + npages * sizeof(out->pas[0]);
426 out = mlx5_vzalloc(outlen);
427 if (!out)
428 return -ENOMEM;
429
430 in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MANAGE_PAGES);
431 in.hdr.opmod = cpu_to_be16(MLX5_PAGES_TAKE);
432 in.func_id = cpu_to_be16(func_id);
433 in.num_entries = cpu_to_be32(npages);
434 mlx5_core_dbg(dev, "npages %d, outlen %d\n", npages, outlen);
435 err = mlx5_cmd_exec(dev, &in, sizeof(in), out, outlen);
436 if (err) {
437 mlx5_core_err(dev, "failed reclaiming pages\n");
438 goto out_free;
439 }
440
441 if (out->hdr.status) {
442 err = mlx5_cmd_status_to_err(&out->hdr);
443 goto out_free;
444 }
445
446 num_claimed = be32_to_cpu(out->num_entries);
447 if (nclaimed)
448 *nclaimed = num_claimed;
449
450 dev->priv.fw_pages -= num_claimed;
451 dev->priv.pages_per_func[func_id] -= num_claimed;
452 for (i = 0; i < num_claimed; i++) {
453 addr = be64_to_cpu(out->pas[i]);
454 free_4k(dev, addr);
455 }
456
457 out_free:
458 kvfree(out);
459 return err;
460 }
461
pages_work_handler(struct work_struct * work)462 static void pages_work_handler(struct work_struct *work)
463 {
464 struct mlx5_pages_req *req = container_of(work, struct mlx5_pages_req, work);
465 struct mlx5_core_dev *dev = req->dev;
466 int err = 0;
467
468 if (req->npages < 0)
469 err = reclaim_pages(dev, req->func_id, -1 * req->npages, NULL);
470 else if (req->npages > 0)
471 err = give_pages(dev, req->func_id, req->npages, 1);
472
473 if (err)
474 mlx5_core_warn(dev, "%s fail %d\n",
475 req->npages < 0 ? "reclaim" : "give", err);
476
477 kfree(req);
478 }
479
mlx5_core_req_pages_handler(struct mlx5_core_dev * dev,u16 func_id,s32 npages)480 void mlx5_core_req_pages_handler(struct mlx5_core_dev *dev, u16 func_id,
481 s32 npages)
482 {
483 struct mlx5_pages_req *req;
484
485 req = kzalloc(sizeof(*req), GFP_ATOMIC);
486 if (!req) {
487 mlx5_core_warn(dev, "failed to allocate pages request\n");
488 return;
489 }
490
491 req->dev = dev;
492 req->func_id = func_id;
493 req->npages = npages;
494 INIT_WORK(&req->work, pages_work_handler);
495 if (!queue_work(dev->priv.pg_wq, &req->work))
496 mlx5_core_warn(dev, "failed to queue pages handler work\n");
497 }
498
mlx5_satisfy_startup_pages(struct mlx5_core_dev * dev,int boot)499 int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)
500 {
501 u16 uninitialized_var(func_id);
502 s32 uninitialized_var(npages);
503 int err;
504
505 err = mlx5_cmd_query_pages(dev, &func_id, &npages, boot);
506 if (err)
507 return err;
508
509 mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n",
510 npages, boot ? "boot" : "init", func_id);
511
512 return give_pages(dev, func_id, npages, 0);
513 }
514
515 enum {
516 MLX5_BLKS_FOR_RECLAIM_PAGES = 12
517 };
518
mlx5_wait_for_reclaim_vfs_pages(struct mlx5_core_dev * dev)519 s64 mlx5_wait_for_reclaim_vfs_pages(struct mlx5_core_dev *dev)
520 {
521 int end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
522 s64 prevpages = 0;
523 s64 npages = 0;
524
525 while (!time_after(jiffies, end)) {
526 /* exclude own function, VFs only */
527 npages = dev->priv.fw_pages - dev->priv.pages_per_func[0];
528 if (!npages)
529 break;
530
531 if (npages != prevpages)
532 end = end + msecs_to_jiffies(100);
533
534 prevpages = npages;
535 msleep(1);
536 }
537
538 if (npages)
539 mlx5_core_warn(dev, "FW did not return all VFs pages, will cause to memory leak\n");
540
541 return -npages;
542 }
543
optimal_reclaimed_pages(void)544 static int optimal_reclaimed_pages(void)
545 {
546 struct mlx5_cmd_prot_block *block;
547 struct mlx5_cmd_layout *lay;
548 int ret;
549
550 ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -
551 sizeof(struct mlx5_manage_pages_outbox)) /
552 FIELD_SIZEOF(struct mlx5_manage_pages_outbox, pas[0]);
553
554 return ret;
555 }
556
mlx5_reclaim_startup_pages(struct mlx5_core_dev * dev)557 int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)
558 {
559 int end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
560 struct mlx5_fw_page *fwp;
561 struct rb_node *p;
562 int nclaimed = 0;
563 int err;
564
565 do {
566 p = rb_first(&dev->priv.page_root);
567 if (p) {
568 fwp = rb_entry(p, struct mlx5_fw_page, rb_node);
569 if (dev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
570 --dev->priv.fw_pages;
571 free_4k(dev, fwp->dma_addr);
572 nclaimed = 1;
573 } else {
574 err = reclaim_pages(dev, fwp->func_id,
575 optimal_reclaimed_pages(),
576 &nclaimed);
577 if (err) {
578 mlx5_core_warn(dev, "failed reclaiming pages (%d)\n",
579 err);
580 return err;
581 }
582 }
583
584 if (nclaimed)
585 end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
586 }
587 if (time_after(jiffies, end)) {
588 mlx5_core_warn(dev, "FW did not return all pages. giving up...\n");
589 break;
590 }
591 } while (p);
592
593 return 0;
594 }
595
mlx5_pagealloc_init(struct mlx5_core_dev * dev)596 void mlx5_pagealloc_init(struct mlx5_core_dev *dev)
597 {
598
599 dev->priv.page_root = RB_ROOT;
600 }
601
mlx5_pagealloc_cleanup(struct mlx5_core_dev * dev)602 void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev)
603 {
604 /* nothing */
605 }
606
mlx5_pagealloc_start(struct mlx5_core_dev * dev)607 int mlx5_pagealloc_start(struct mlx5_core_dev *dev)
608 {
609 dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator");
610 if (!dev->priv.pg_wq)
611 return -ENOMEM;
612
613 return 0;
614 }
615
mlx5_pagealloc_stop(struct mlx5_core_dev * dev)616 void mlx5_pagealloc_stop(struct mlx5_core_dev *dev)
617 {
618 destroy_workqueue(dev->priv.pg_wq);
619 }
620