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 * $FreeBSD$
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 enum {
45 MAX_RECLAIM_TIME_MSECS = 5000,
46 };
47
48 static void
mlx5_fwp_load_mem_cb(void * arg,bus_dma_segment_t * segs,int nseg,int error)49 mlx5_fwp_load_mem_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
50 {
51 struct mlx5_fw_page *fwp;
52 uint8_t owned;
53
54 fwp = (struct mlx5_fw_page *)arg;
55 owned = MLX5_DMA_OWNED(fwp->dev);
56
57 if (!owned)
58 MLX5_DMA_LOCK(fwp->dev);
59
60 if (error == 0) {
61 KASSERT(nseg == 1, ("Number of segments is different from 1"));
62 fwp->dma_addr = segs->ds_addr;
63 fwp->load_done = MLX5_LOAD_ST_SUCCESS;
64 } else {
65 fwp->load_done = MLX5_LOAD_ST_FAILURE;
66 }
67 MLX5_DMA_DONE(fwp->dev);
68
69 if (!owned)
70 MLX5_DMA_UNLOCK(fwp->dev);
71 }
72
73 void
mlx5_fwp_flush(struct mlx5_fw_page * fwp)74 mlx5_fwp_flush(struct mlx5_fw_page *fwp)
75 {
76 unsigned num = fwp->numpages;
77
78 while (num--)
79 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_PREWRITE);
80 }
81
82 void
mlx5_fwp_invalidate(struct mlx5_fw_page * fwp)83 mlx5_fwp_invalidate(struct mlx5_fw_page *fwp)
84 {
85 unsigned num = fwp->numpages;
86
87 while (num--) {
88 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_POSTREAD);
89 bus_dmamap_sync(fwp[num].dev->cmd.dma_tag, fwp[num].dma_map, BUS_DMASYNC_PREREAD);
90 }
91 }
92
93 struct mlx5_fw_page *
mlx5_fwp_alloc(struct mlx5_core_dev * dev,gfp_t flags,unsigned num)94 mlx5_fwp_alloc(struct mlx5_core_dev *dev, gfp_t flags, unsigned num)
95 {
96 struct mlx5_fw_page *fwp;
97 unsigned x;
98 int err;
99
100 /* check for special case */
101 if (num == 0) {
102 fwp = kzalloc(sizeof(*fwp), flags);
103 if (fwp != NULL)
104 fwp->dev = dev;
105 return (fwp);
106 }
107
108 /* we need sleeping context for this function */
109 if (flags & M_NOWAIT)
110 return (NULL);
111
112 fwp = kzalloc(sizeof(*fwp) * num, flags);
113
114 /* serialize loading the DMA map(s) */
115 sx_xlock(&dev->cmd.dma_sx);
116
117 for (x = 0; x != num; x++) {
118 /* store pointer to MLX5 core device */
119 fwp[x].dev = dev;
120 /* store number of pages left from the array */
121 fwp[x].numpages = num - x;
122
123 /* allocate memory */
124 err = bus_dmamem_alloc(dev->cmd.dma_tag, &fwp[x].virt_addr,
125 BUS_DMA_WAITOK | BUS_DMA_COHERENT, &fwp[x].dma_map);
126 if (err != 0)
127 goto failure;
128
129 /* load memory into DMA */
130 MLX5_DMA_LOCK(dev);
131 (void) bus_dmamap_load(
132 dev->cmd.dma_tag, fwp[x].dma_map, fwp[x].virt_addr,
133 MLX5_ADAPTER_PAGE_SIZE, &mlx5_fwp_load_mem_cb,
134 fwp + x, BUS_DMA_WAITOK | BUS_DMA_COHERENT);
135
136 while (fwp[x].load_done == MLX5_LOAD_ST_NONE)
137 MLX5_DMA_WAIT(dev);
138 MLX5_DMA_UNLOCK(dev);
139
140 /* check for error */
141 if (fwp[x].load_done != MLX5_LOAD_ST_SUCCESS) {
142 bus_dmamem_free(dev->cmd.dma_tag, fwp[x].virt_addr,
143 fwp[x].dma_map);
144 goto failure;
145 }
146 }
147 sx_xunlock(&dev->cmd.dma_sx);
148 return (fwp);
149
150 failure:
151 while (x--) {
152 bus_dmamap_unload(dev->cmd.dma_tag, fwp[x].dma_map);
153 bus_dmamem_free(dev->cmd.dma_tag, fwp[x].virt_addr, fwp[x].dma_map);
154 }
155 sx_xunlock(&dev->cmd.dma_sx);
156 kfree(fwp);
157 return (NULL);
158 }
159
160 void
mlx5_fwp_free(struct mlx5_fw_page * fwp)161 mlx5_fwp_free(struct mlx5_fw_page *fwp)
162 {
163 struct mlx5_core_dev *dev;
164 unsigned num;
165
166 /* be NULL safe */
167 if (fwp == NULL)
168 return;
169
170 /* check for special case */
171 if (fwp->numpages == 0) {
172 kfree(fwp);
173 return;
174 }
175
176 num = fwp->numpages;
177 dev = fwp->dev;
178
179 while (num--) {
180 bus_dmamap_unload(dev->cmd.dma_tag, fwp[num].dma_map);
181 bus_dmamem_free(dev->cmd.dma_tag, fwp[num].virt_addr, fwp[num].dma_map);
182 }
183
184 kfree(fwp);
185 }
186
187 u64
mlx5_fwp_get_dma(struct mlx5_fw_page * fwp,size_t offset)188 mlx5_fwp_get_dma(struct mlx5_fw_page *fwp, size_t offset)
189 {
190 size_t index = (offset / MLX5_ADAPTER_PAGE_SIZE);
191 KASSERT(index < fwp->numpages, ("Invalid offset: %lld", (long long)offset));
192
193 return ((fwp + index)->dma_addr + (offset % MLX5_ADAPTER_PAGE_SIZE));
194 }
195
196 void *
mlx5_fwp_get_virt(struct mlx5_fw_page * fwp,size_t offset)197 mlx5_fwp_get_virt(struct mlx5_fw_page *fwp, size_t offset)
198 {
199 size_t index = (offset / MLX5_ADAPTER_PAGE_SIZE);
200 KASSERT(index < fwp->numpages, ("Invalid offset: %lld", (long long)offset));
201
202 return ((char *)(fwp + index)->virt_addr + (offset % MLX5_ADAPTER_PAGE_SIZE));
203 }
204
205 static int
mlx5_insert_fw_page_locked(struct mlx5_core_dev * dev,struct mlx5_fw_page * nfp)206 mlx5_insert_fw_page_locked(struct mlx5_core_dev *dev, struct mlx5_fw_page *nfp)
207 {
208 struct rb_root *root = &dev->priv.page_root;
209 struct rb_node **new = &root->rb_node;
210 struct rb_node *parent = NULL;
211 struct mlx5_fw_page *tfp;
212
213 while (*new) {
214 parent = *new;
215 tfp = rb_entry(parent, struct mlx5_fw_page, rb_node);
216 if (tfp->dma_addr < nfp->dma_addr)
217 new = &parent->rb_left;
218 else if (tfp->dma_addr > nfp->dma_addr)
219 new = &parent->rb_right;
220 else
221 return (-EEXIST);
222 }
223
224 rb_link_node(&nfp->rb_node, parent, new);
225 rb_insert_color(&nfp->rb_node, root);
226 return (0);
227 }
228
229 static struct mlx5_fw_page *
mlx5_remove_fw_page_locked(struct mlx5_core_dev * dev,bus_addr_t addr)230 mlx5_remove_fw_page_locked(struct mlx5_core_dev *dev, bus_addr_t addr)
231 {
232 struct rb_root *root = &dev->priv.page_root;
233 struct rb_node *tmp = root->rb_node;
234 struct mlx5_fw_page *result = NULL;
235 struct mlx5_fw_page *tfp;
236
237 while (tmp) {
238 tfp = rb_entry(tmp, struct mlx5_fw_page, rb_node);
239 if (tfp->dma_addr < addr) {
240 tmp = tmp->rb_left;
241 } else if (tfp->dma_addr > addr) {
242 tmp = tmp->rb_right;
243 } else {
244 rb_erase(&tfp->rb_node, &dev->priv.page_root);
245 result = tfp;
246 break;
247 }
248 }
249 return (result);
250 }
251
252 static int
alloc_4k(struct mlx5_core_dev * dev,u64 * addr,u16 func_id)253 alloc_4k(struct mlx5_core_dev *dev, u64 *addr, u16 func_id)
254 {
255 struct mlx5_fw_page *fwp;
256 int err;
257
258 fwp = mlx5_fwp_alloc(dev, GFP_KERNEL, 1);
259 if (fwp == NULL)
260 return (-ENOMEM);
261
262 fwp->func_id = func_id;
263
264 MLX5_DMA_LOCK(dev);
265 err = mlx5_insert_fw_page_locked(dev, fwp);
266 MLX5_DMA_UNLOCK(dev);
267
268 if (err != 0) {
269 mlx5_fwp_free(fwp);
270 } else {
271 /* make sure cached data is cleaned */
272 mlx5_fwp_invalidate(fwp);
273
274 /* store DMA address */
275 *addr = fwp->dma_addr;
276 }
277 return (err);
278 }
279
280 static void
free_4k(struct mlx5_core_dev * dev,u64 addr)281 free_4k(struct mlx5_core_dev *dev, u64 addr)
282 {
283 struct mlx5_fw_page *fwp;
284
285 MLX5_DMA_LOCK(dev);
286 fwp = mlx5_remove_fw_page_locked(dev, addr);
287 MLX5_DMA_UNLOCK(dev);
288
289 if (fwp == NULL) {
290 mlx5_core_warn(dev, "Cannot free 4K page at 0x%llx\n", (long long)addr);
291 return;
292 }
293 mlx5_fwp_free(fwp);
294 }
295
mlx5_cmd_query_pages(struct mlx5_core_dev * dev,u16 * func_id,s32 * npages,int boot)296 static int mlx5_cmd_query_pages(struct mlx5_core_dev *dev, u16 *func_id,
297 s32 *npages, int boot)
298 {
299 u32 in[MLX5_ST_SZ_DW(query_pages_in)] = {0};
300 u32 out[MLX5_ST_SZ_DW(query_pages_out)] = {0};
301 int err;
302
303 MLX5_SET(query_pages_in, in, opcode, MLX5_CMD_OP_QUERY_PAGES);
304 MLX5_SET(query_pages_in, in, op_mod, boot ?
305 MLX5_QUERY_PAGES_IN_OP_MOD_BOOT_PAGES :
306 MLX5_QUERY_PAGES_IN_OP_MOD_INIT_PAGES);
307
308 err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
309 if (err)
310 return err;
311
312 *npages = MLX5_GET(query_pages_out, out, num_pages);
313 *func_id = MLX5_GET(query_pages_out, out, function_id);
314
315 return 0;
316 }
317
give_pages(struct mlx5_core_dev * dev,u16 func_id,int npages,int notify_fail)318 static int give_pages(struct mlx5_core_dev *dev, u16 func_id, int npages,
319 int notify_fail)
320 {
321 u32 out[MLX5_ST_SZ_DW(manage_pages_out)] = {0};
322 int inlen = MLX5_ST_SZ_BYTES(manage_pages_in);
323 u64 addr;
324 int err;
325 u32 *in, *nin;
326 int i = 0;
327
328 inlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_in, pas[0]);
329 in = mlx5_vzalloc(inlen);
330 if (!in) {
331 mlx5_core_warn(dev, "vzalloc failed %d\n", inlen);
332 err = -ENOMEM;
333 goto out_alloc;
334 }
335
336 for (i = 0; i < npages; i++) {
337 err = alloc_4k(dev, &addr, func_id);
338 if (err)
339 goto out_alloc;
340 MLX5_ARRAY_SET64(manage_pages_in, in, pas, i, addr);
341 }
342
343 MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES);
344 MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_GIVE);
345 MLX5_SET(manage_pages_in, in, function_id, func_id);
346 MLX5_SET(manage_pages_in, in, input_num_entries, npages);
347
348 err = mlx5_cmd_exec(dev, in, inlen, out, sizeof(out));
349 if (err) {
350 mlx5_core_warn(dev, "func_id 0x%x, npages %d, err %d\n",
351 func_id, npages, err);
352 goto out_alloc;
353 }
354 dev->priv.fw_pages += npages;
355 dev->priv.pages_per_func[func_id] += npages;
356
357 mlx5_core_dbg(dev, "err %d\n", err);
358
359 goto out_free;
360
361 out_alloc:
362 if (notify_fail) {
363 nin = mlx5_vzalloc(inlen);
364 if (!nin)
365 goto out_4k;
366
367 memset(&out, 0, sizeof(out));
368 MLX5_SET(manage_pages_in, nin, opcode, MLX5_CMD_OP_MANAGE_PAGES);
369 MLX5_SET(manage_pages_in, nin, op_mod, MLX5_PAGES_CANT_GIVE);
370 MLX5_SET(manage_pages_in, nin, function_id, func_id);
371 if (mlx5_cmd_exec(dev, nin, inlen, out, sizeof(out)))
372 mlx5_core_warn(dev, "page notify failed\n");
373 kvfree(nin);
374 }
375
376 out_4k:
377 for (i--; i >= 0; i--)
378 free_4k(dev, MLX5_GET64(manage_pages_in, in, pas[i]));
379 out_free:
380 kvfree(in);
381 return err;
382 }
383
reclaim_pages_cmd(struct mlx5_core_dev * dev,u32 * in,int in_size,u32 * out,int out_size)384 static int reclaim_pages_cmd(struct mlx5_core_dev *dev,
385 u32 *in, int in_size, u32 *out, int out_size)
386 {
387 struct mlx5_fw_page *fwp;
388 struct rb_node *p;
389 u32 func_id;
390 u32 npages;
391 u32 i = 0;
392
393 if (dev->state != MLX5_DEVICE_STATE_INTERNAL_ERROR)
394 return mlx5_cmd_exec(dev, in, in_size, out, out_size);
395
396 /* No hard feelings, we want our pages back! */
397 npages = MLX5_GET(manage_pages_in, in, input_num_entries);
398 func_id = MLX5_GET(manage_pages_in, in, function_id);
399
400 p = rb_first(&dev->priv.page_root);
401 while (p && i < npages) {
402 fwp = rb_entry(p, struct mlx5_fw_page, rb_node);
403 p = rb_next(p);
404 if (fwp->func_id != func_id)
405 continue;
406
407 MLX5_ARRAY_SET64(manage_pages_out, out, pas, i, fwp->dma_addr);
408 i++;
409 }
410
411 MLX5_SET(manage_pages_out, out, output_num_entries, i);
412 return 0;
413 }
414
reclaim_pages(struct mlx5_core_dev * dev,u32 func_id,int npages,int * nclaimed)415 static int reclaim_pages(struct mlx5_core_dev *dev, u32 func_id, int npages,
416 int *nclaimed)
417 {
418 int outlen = MLX5_ST_SZ_BYTES(manage_pages_out);
419 u32 in[MLX5_ST_SZ_DW(manage_pages_in)] = {0};
420 int num_claimed;
421 u32 *out;
422 int err;
423 int i;
424
425 if (nclaimed)
426 *nclaimed = 0;
427
428 outlen += npages * MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);
429 out = mlx5_vzalloc(outlen);
430 if (!out)
431 return -ENOMEM;
432
433 MLX5_SET(manage_pages_in, in, opcode, MLX5_CMD_OP_MANAGE_PAGES);
434 MLX5_SET(manage_pages_in, in, op_mod, MLX5_PAGES_TAKE);
435 MLX5_SET(manage_pages_in, in, function_id, func_id);
436 MLX5_SET(manage_pages_in, in, input_num_entries, npages);
437
438 mlx5_core_dbg(dev, "npages %d, outlen %d\n", npages, outlen);
439 err = reclaim_pages_cmd(dev, in, sizeof(in), out, outlen);
440 if (err) {
441 mlx5_core_err(dev, "failed reclaiming pages\n");
442 goto out_free;
443 }
444
445 num_claimed = MLX5_GET(manage_pages_out, out, output_num_entries);
446 if (nclaimed)
447 *nclaimed = num_claimed;
448
449 dev->priv.fw_pages -= num_claimed;
450 dev->priv.pages_per_func[func_id] -= num_claimed;
451 for (i = 0; i < num_claimed; i++)
452 free_4k(dev, MLX5_GET64(manage_pages_out, out, pas[i]));
453
454 out_free:
455 kvfree(out);
456 return err;
457 }
458
pages_work_handler(struct work_struct * work)459 static void pages_work_handler(struct work_struct *work)
460 {
461 struct mlx5_pages_req *req = container_of(work, struct mlx5_pages_req, work);
462 struct mlx5_core_dev *dev = req->dev;
463 int err = 0;
464
465 if (req->npages < 0)
466 err = reclaim_pages(dev, req->func_id, -1 * req->npages, NULL);
467 else if (req->npages > 0)
468 err = give_pages(dev, req->func_id, req->npages, 1);
469
470 if (err)
471 mlx5_core_warn(dev, "%s fail %d\n",
472 req->npages < 0 ? "reclaim" : "give", err);
473
474 kfree(req);
475 }
476
mlx5_core_req_pages_handler(struct mlx5_core_dev * dev,u16 func_id,s32 npages)477 void mlx5_core_req_pages_handler(struct mlx5_core_dev *dev, u16 func_id,
478 s32 npages)
479 {
480 struct mlx5_pages_req *req;
481
482 req = kzalloc(sizeof(*req), GFP_ATOMIC);
483 if (!req) {
484 mlx5_core_warn(dev, "failed to allocate pages request\n");
485 return;
486 }
487
488 req->dev = dev;
489 req->func_id = func_id;
490 req->npages = npages;
491 INIT_WORK(&req->work, pages_work_handler);
492 if (!queue_work(dev->priv.pg_wq, &req->work))
493 mlx5_core_warn(dev, "failed to queue pages handler work\n");
494 }
495
mlx5_satisfy_startup_pages(struct mlx5_core_dev * dev,int boot)496 int mlx5_satisfy_startup_pages(struct mlx5_core_dev *dev, int boot)
497 {
498 u16 uninitialized_var(func_id);
499 s32 uninitialized_var(npages);
500 int err;
501
502 err = mlx5_cmd_query_pages(dev, &func_id, &npages, boot);
503 if (err)
504 return err;
505
506 mlx5_core_dbg(dev, "requested %d %s pages for func_id 0x%x\n",
507 npages, boot ? "boot" : "init", func_id);
508
509 return give_pages(dev, func_id, npages, 0);
510 }
511
512 enum {
513 MLX5_BLKS_FOR_RECLAIM_PAGES = 12
514 };
515
mlx5_wait_for_reclaim_vfs_pages(struct mlx5_core_dev * dev)516 s64 mlx5_wait_for_reclaim_vfs_pages(struct mlx5_core_dev *dev)
517 {
518 int end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
519 s64 prevpages = 0;
520 s64 npages = 0;
521
522 while (!time_after(jiffies, end)) {
523 /* exclude own function, VFs only */
524 npages = dev->priv.fw_pages - dev->priv.pages_per_func[0];
525 if (!npages)
526 break;
527
528 if (npages != prevpages)
529 end = end + msecs_to_jiffies(100);
530
531 prevpages = npages;
532 msleep(1);
533 }
534
535 if (npages)
536 mlx5_core_warn(dev, "FW did not return all VFs pages, will cause to memory leak\n");
537
538 return -npages;
539 }
540
optimal_reclaimed_pages(void)541 static int optimal_reclaimed_pages(void)
542 {
543 struct mlx5_cmd_prot_block *block;
544 struct mlx5_cmd_layout *lay;
545 int ret;
546
547 ret = (sizeof(lay->out) + MLX5_BLKS_FOR_RECLAIM_PAGES * sizeof(block->data) -
548 MLX5_ST_SZ_BYTES(manage_pages_out)) /
549 MLX5_FLD_SZ_BYTES(manage_pages_out, pas[0]);
550
551 return ret;
552 }
553
mlx5_reclaim_startup_pages(struct mlx5_core_dev * dev)554 int mlx5_reclaim_startup_pages(struct mlx5_core_dev *dev)
555 {
556 int end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
557 struct mlx5_fw_page *fwp;
558 struct rb_node *p;
559 int nclaimed = 0;
560 int err;
561
562 do {
563 p = rb_first(&dev->priv.page_root);
564 if (p) {
565 fwp = rb_entry(p, struct mlx5_fw_page, rb_node);
566 err = reclaim_pages(dev, fwp->func_id,
567 optimal_reclaimed_pages(),
568 &nclaimed);
569 if (err) {
570 mlx5_core_warn(dev, "failed reclaiming pages (%d)\n",
571 err);
572 return err;
573 }
574
575 if (nclaimed)
576 end = jiffies + msecs_to_jiffies(MAX_RECLAIM_TIME_MSECS);
577 }
578 if (time_after(jiffies, end)) {
579 mlx5_core_warn(dev, "FW did not return all pages. giving up...\n");
580 break;
581 }
582 } while (p);
583
584 return 0;
585 }
586
mlx5_pagealloc_init(struct mlx5_core_dev * dev)587 void mlx5_pagealloc_init(struct mlx5_core_dev *dev)
588 {
589
590 dev->priv.page_root = RB_ROOT;
591 }
592
mlx5_pagealloc_cleanup(struct mlx5_core_dev * dev)593 void mlx5_pagealloc_cleanup(struct mlx5_core_dev *dev)
594 {
595 /* nothing */
596 }
597
mlx5_pagealloc_start(struct mlx5_core_dev * dev)598 int mlx5_pagealloc_start(struct mlx5_core_dev *dev)
599 {
600 dev->priv.pg_wq = create_singlethread_workqueue("mlx5_page_allocator");
601 if (!dev->priv.pg_wq)
602 return -ENOMEM;
603
604 return 0;
605 }
606
mlx5_pagealloc_stop(struct mlx5_core_dev * dev)607 void mlx5_pagealloc_stop(struct mlx5_core_dev *dev)
608 {
609 destroy_workqueue(dev->priv.pg_wq);
610 }
611