1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
2 /*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
5 */
6
7 #include <linux/libnvdimm.h>
8
9 #include "rxe.h"
10 #include "rxe_loc.h"
11
12 /* Return a random 8 bit key value that is
13 * different than the last_key. Set last_key to -1
14 * if this is the first key for an MR or MW
15 */
rxe_get_next_key(u32 last_key)16 u8 rxe_get_next_key(u32 last_key)
17 {
18 u8 key;
19
20 do {
21 get_random_bytes(&key, 1);
22 } while (key == last_key);
23
24 return key;
25 }
26
mr_check_range(struct rxe_mr * mr,u64 iova,size_t length)27 int mr_check_range(struct rxe_mr *mr, u64 iova, size_t length)
28 {
29 switch (mr->ibmr.type) {
30 case IB_MR_TYPE_DMA:
31 return 0;
32
33 case IB_MR_TYPE_USER:
34 case IB_MR_TYPE_MEM_REG:
35 if (iova < mr->ibmr.iova ||
36 iova + length > mr->ibmr.iova + mr->ibmr.length) {
37 rxe_dbg_mr(mr, "iova/length out of range\n");
38 return -EINVAL;
39 }
40 return 0;
41
42 default:
43 rxe_dbg_mr(mr, "mr type not supported\n");
44 return -EINVAL;
45 }
46 }
47
rxe_mr_init(int access,struct rxe_mr * mr)48 void rxe_mr_init(int access, struct rxe_mr *mr)
49 {
50 u32 key = mr->elem.index << 8 | rxe_get_next_key(-1);
51
52 /* set ibmr->l/rkey and also copy into private l/rkey
53 * for user MRs these will always be the same
54 * for cases where caller 'owns' the key portion
55 * they may be different until REG_MR WQE is executed.
56 */
57 mr->lkey = mr->ibmr.lkey = key;
58 mr->rkey = mr->ibmr.rkey = key;
59
60 mr->access = access;
61 mr->ibmr.page_size = PAGE_SIZE;
62 mr->page_mask = PAGE_MASK;
63 mr->page_shift = PAGE_SHIFT;
64 mr->state = RXE_MR_STATE_INVALID;
65 }
66
rxe_mr_init_dma(int access,struct rxe_mr * mr)67 void rxe_mr_init_dma(int access, struct rxe_mr *mr)
68 {
69 rxe_mr_init(access, mr);
70
71 mr->state = RXE_MR_STATE_VALID;
72 mr->ibmr.type = IB_MR_TYPE_DMA;
73 }
74
rxe_mr_iova_to_index(struct rxe_mr * mr,u64 iova)75 static unsigned long rxe_mr_iova_to_index(struct rxe_mr *mr, u64 iova)
76 {
77 return (iova >> mr->page_shift) - (mr->ibmr.iova >> mr->page_shift);
78 }
79
rxe_mr_iova_to_page_offset(struct rxe_mr * mr,u64 iova)80 static unsigned long rxe_mr_iova_to_page_offset(struct rxe_mr *mr, u64 iova)
81 {
82 return iova & (mr_page_size(mr) - 1);
83 }
84
is_pmem_page(struct page * pg)85 static bool is_pmem_page(struct page *pg)
86 {
87 unsigned long paddr = page_to_phys(pg);
88
89 return REGION_INTERSECTS ==
90 region_intersects(paddr, PAGE_SIZE, IORESOURCE_MEM,
91 IORES_DESC_PERSISTENT_MEMORY);
92 }
93
rxe_mr_fill_pages_from_sgt(struct rxe_mr * mr,struct sg_table * sgt)94 static int rxe_mr_fill_pages_from_sgt(struct rxe_mr *mr, struct sg_table *sgt)
95 {
96 XA_STATE(xas, &mr->page_list, 0);
97 struct sg_page_iter sg_iter;
98 struct page *page;
99 bool persistent = !!(mr->access & IB_ACCESS_FLUSH_PERSISTENT);
100
101 __sg_page_iter_start(&sg_iter, sgt->sgl, sgt->orig_nents, 0);
102 if (!__sg_page_iter_next(&sg_iter))
103 return 0;
104
105 do {
106 xas_lock(&xas);
107 while (true) {
108 page = sg_page_iter_page(&sg_iter);
109
110 if (persistent && !is_pmem_page(page)) {
111 rxe_dbg_mr(mr, "Page can't be persistent\n");
112 xas_set_err(&xas, -EINVAL);
113 break;
114 }
115
116 xas_store(&xas, page);
117 if (xas_error(&xas))
118 break;
119 xas_next(&xas);
120 if (!__sg_page_iter_next(&sg_iter))
121 break;
122 }
123 xas_unlock(&xas);
124 } while (xas_nomem(&xas, GFP_KERNEL));
125
126 return xas_error(&xas);
127 }
128
rxe_mr_init_user(struct rxe_dev * rxe,u64 start,u64 length,int access,struct rxe_mr * mr)129 int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length,
130 int access, struct rxe_mr *mr)
131 {
132 struct ib_umem *umem;
133 int err;
134
135 rxe_mr_init(access, mr);
136
137 xa_init(&mr->page_list);
138
139 umem = ib_umem_get(&rxe->ib_dev, start, length, access);
140 if (IS_ERR(umem)) {
141 rxe_dbg_mr(mr, "Unable to pin memory region err = %d\n",
142 (int)PTR_ERR(umem));
143 return PTR_ERR(umem);
144 }
145
146 err = rxe_mr_fill_pages_from_sgt(mr, &umem->sgt_append.sgt);
147 if (err) {
148 ib_umem_release(umem);
149 return err;
150 }
151
152 mr->umem = umem;
153 mr->ibmr.type = IB_MR_TYPE_USER;
154 mr->state = RXE_MR_STATE_VALID;
155
156 return 0;
157 }
158
rxe_mr_alloc(struct rxe_mr * mr,int num_buf)159 static int rxe_mr_alloc(struct rxe_mr *mr, int num_buf)
160 {
161 XA_STATE(xas, &mr->page_list, 0);
162 int i = 0;
163 int err;
164
165 xa_init(&mr->page_list);
166
167 do {
168 xas_lock(&xas);
169 while (i != num_buf) {
170 xas_store(&xas, XA_ZERO_ENTRY);
171 if (xas_error(&xas))
172 break;
173 xas_next(&xas);
174 i++;
175 }
176 xas_unlock(&xas);
177 } while (xas_nomem(&xas, GFP_KERNEL));
178
179 err = xas_error(&xas);
180 if (err)
181 return err;
182
183 mr->num_buf = num_buf;
184
185 return 0;
186 }
187
rxe_mr_init_fast(int max_pages,struct rxe_mr * mr)188 int rxe_mr_init_fast(int max_pages, struct rxe_mr *mr)
189 {
190 int err;
191
192 /* always allow remote access for FMRs */
193 rxe_mr_init(RXE_ACCESS_REMOTE, mr);
194
195 err = rxe_mr_alloc(mr, max_pages);
196 if (err)
197 goto err1;
198
199 mr->state = RXE_MR_STATE_FREE;
200 mr->ibmr.type = IB_MR_TYPE_MEM_REG;
201
202 return 0;
203
204 err1:
205 return err;
206 }
207
rxe_set_page(struct ib_mr * ibmr,u64 dma_addr)208 static int rxe_set_page(struct ib_mr *ibmr, u64 dma_addr)
209 {
210 struct rxe_mr *mr = to_rmr(ibmr);
211 struct page *page = ib_virt_dma_to_page(dma_addr);
212 bool persistent = !!(mr->access & IB_ACCESS_FLUSH_PERSISTENT);
213 int err;
214
215 if (persistent && !is_pmem_page(page)) {
216 rxe_dbg_mr(mr, "Page cannot be persistent\n");
217 return -EINVAL;
218 }
219
220 if (unlikely(mr->nbuf == mr->num_buf))
221 return -ENOMEM;
222
223 err = xa_err(xa_store(&mr->page_list, mr->nbuf, page, GFP_KERNEL));
224 if (err)
225 return err;
226
227 mr->nbuf++;
228 return 0;
229 }
230
rxe_map_mr_sg(struct ib_mr * ibmr,struct scatterlist * sgl,int sg_nents,unsigned int * sg_offset)231 int rxe_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sgl,
232 int sg_nents, unsigned int *sg_offset)
233 {
234 struct rxe_mr *mr = to_rmr(ibmr);
235 unsigned int page_size = mr_page_size(mr);
236
237 mr->nbuf = 0;
238 mr->page_shift = ilog2(page_size);
239 mr->page_mask = ~((u64)page_size - 1);
240 mr->page_offset = mr->ibmr.iova & (page_size - 1);
241
242 return ib_sg_to_pages(ibmr, sgl, sg_nents, sg_offset, rxe_set_page);
243 }
244
rxe_mr_copy_xarray(struct rxe_mr * mr,u64 iova,void * addr,unsigned int length,enum rxe_mr_copy_dir dir)245 static int rxe_mr_copy_xarray(struct rxe_mr *mr, u64 iova, void *addr,
246 unsigned int length, enum rxe_mr_copy_dir dir)
247 {
248 unsigned int page_offset = rxe_mr_iova_to_page_offset(mr, iova);
249 unsigned long index = rxe_mr_iova_to_index(mr, iova);
250 unsigned int bytes;
251 struct page *page;
252 void *va;
253
254 while (length) {
255 page = xa_load(&mr->page_list, index);
256 if (!page)
257 return -EFAULT;
258
259 bytes = min_t(unsigned int, length,
260 mr_page_size(mr) - page_offset);
261 va = kmap_local_page(page);
262 if (dir == RXE_FROM_MR_OBJ)
263 memcpy(addr, va + page_offset, bytes);
264 else
265 memcpy(va + page_offset, addr, bytes);
266 kunmap_local(va);
267
268 page_offset = 0;
269 addr += bytes;
270 length -= bytes;
271 index++;
272 }
273
274 return 0;
275 }
276
rxe_mr_copy_dma(struct rxe_mr * mr,u64 dma_addr,void * addr,unsigned int length,enum rxe_mr_copy_dir dir)277 static void rxe_mr_copy_dma(struct rxe_mr *mr, u64 dma_addr, void *addr,
278 unsigned int length, enum rxe_mr_copy_dir dir)
279 {
280 unsigned int page_offset = dma_addr & (PAGE_SIZE - 1);
281 unsigned int bytes;
282 struct page *page;
283 u8 *va;
284
285 while (length) {
286 page = ib_virt_dma_to_page(dma_addr);
287 bytes = min_t(unsigned int, length,
288 PAGE_SIZE - page_offset);
289 va = kmap_local_page(page);
290
291 if (dir == RXE_TO_MR_OBJ)
292 memcpy(va + page_offset, addr, bytes);
293 else
294 memcpy(addr, va + page_offset, bytes);
295
296 kunmap_local(va);
297 page_offset = 0;
298 dma_addr += bytes;
299 addr += bytes;
300 length -= bytes;
301 }
302 }
303
rxe_mr_copy(struct rxe_mr * mr,u64 iova,void * addr,unsigned int length,enum rxe_mr_copy_dir dir)304 int rxe_mr_copy(struct rxe_mr *mr, u64 iova, void *addr,
305 unsigned int length, enum rxe_mr_copy_dir dir)
306 {
307 int err;
308
309 if (length == 0)
310 return 0;
311
312 if (WARN_ON(!mr))
313 return -EINVAL;
314
315 if (mr->ibmr.type == IB_MR_TYPE_DMA) {
316 rxe_mr_copy_dma(mr, iova, addr, length, dir);
317 return 0;
318 }
319
320 err = mr_check_range(mr, iova, length);
321 if (unlikely(err)) {
322 rxe_dbg_mr(mr, "iova out of range\n");
323 return err;
324 }
325
326 if (is_odp_mr(mr))
327 return rxe_odp_mr_copy(mr, iova, addr, length, dir);
328 else
329 return rxe_mr_copy_xarray(mr, iova, addr, length, dir);
330 }
331
332 /* copy data in or out of a wqe, i.e. sg list
333 * under the control of a dma descriptor
334 */
copy_data(struct rxe_pd * pd,int access,struct rxe_dma_info * dma,void * addr,int length,enum rxe_mr_copy_dir dir)335 int copy_data(
336 struct rxe_pd *pd,
337 int access,
338 struct rxe_dma_info *dma,
339 void *addr,
340 int length,
341 enum rxe_mr_copy_dir dir)
342 {
343 int bytes;
344 struct rxe_sge *sge = &dma->sge[dma->cur_sge];
345 int offset = dma->sge_offset;
346 int resid = dma->resid;
347 struct rxe_mr *mr = NULL;
348 u64 iova;
349 int err;
350
351 if (length == 0)
352 return 0;
353
354 if (length > resid) {
355 err = -EINVAL;
356 goto err2;
357 }
358
359 if (sge->length && (offset < sge->length)) {
360 mr = lookup_mr(pd, access, sge->lkey, RXE_LOOKUP_LOCAL);
361 if (!mr) {
362 err = -EINVAL;
363 goto err1;
364 }
365 }
366
367 while (length > 0) {
368 bytes = length;
369
370 if (offset >= sge->length) {
371 if (mr) {
372 rxe_put(mr);
373 mr = NULL;
374 }
375 sge++;
376 dma->cur_sge++;
377 offset = 0;
378
379 if (dma->cur_sge >= dma->num_sge) {
380 err = -ENOSPC;
381 goto err2;
382 }
383
384 if (sge->length) {
385 mr = lookup_mr(pd, access, sge->lkey,
386 RXE_LOOKUP_LOCAL);
387 if (!mr) {
388 err = -EINVAL;
389 goto err1;
390 }
391 } else {
392 continue;
393 }
394 }
395
396 if (bytes > sge->length - offset)
397 bytes = sge->length - offset;
398
399 if (bytes > 0) {
400 iova = sge->addr + offset;
401 err = rxe_mr_copy(mr, iova, addr, bytes, dir);
402 if (err)
403 goto err2;
404
405 offset += bytes;
406 resid -= bytes;
407 length -= bytes;
408 addr += bytes;
409 }
410 }
411
412 dma->sge_offset = offset;
413 dma->resid = resid;
414
415 if (mr)
416 rxe_put(mr);
417
418 return 0;
419
420 err2:
421 if (mr)
422 rxe_put(mr);
423 err1:
424 return err;
425 }
426
rxe_flush_pmem_iova(struct rxe_mr * mr,u64 iova,unsigned int length)427 int rxe_flush_pmem_iova(struct rxe_mr *mr, u64 iova, unsigned int length)
428 {
429 unsigned int page_offset;
430 unsigned long index;
431 struct page *page;
432 unsigned int bytes;
433 int err;
434 u8 *va;
435
436 /* mr must be valid even if length is zero */
437 if (WARN_ON(!mr))
438 return -EINVAL;
439
440 if (length == 0)
441 return 0;
442
443 if (mr->ibmr.type == IB_MR_TYPE_DMA)
444 return -EFAULT;
445
446 err = mr_check_range(mr, iova, length);
447 if (err)
448 return err;
449
450 while (length > 0) {
451 index = rxe_mr_iova_to_index(mr, iova);
452 page = xa_load(&mr->page_list, index);
453 page_offset = rxe_mr_iova_to_page_offset(mr, iova);
454 if (!page)
455 return -EFAULT;
456 bytes = min_t(unsigned int, length,
457 mr_page_size(mr) - page_offset);
458
459 va = kmap_local_page(page);
460 arch_wb_cache_pmem(va + page_offset, bytes);
461 kunmap_local(va);
462
463 length -= bytes;
464 iova += bytes;
465 page_offset = 0;
466 }
467
468 return 0;
469 }
470
471 /* Guarantee atomicity of atomic operations at the machine level. */
472 DEFINE_SPINLOCK(atomic_ops_lock);
473
rxe_mr_do_atomic_op(struct rxe_mr * mr,u64 iova,int opcode,u64 compare,u64 swap_add,u64 * orig_val)474 int rxe_mr_do_atomic_op(struct rxe_mr *mr, u64 iova, int opcode,
475 u64 compare, u64 swap_add, u64 *orig_val)
476 {
477 unsigned int page_offset;
478 struct page *page;
479 u64 value;
480 u64 *va;
481
482 if (unlikely(mr->state != RXE_MR_STATE_VALID)) {
483 rxe_dbg_mr(mr, "mr not in valid state\n");
484 return RESPST_ERR_RKEY_VIOLATION;
485 }
486
487 if (mr->ibmr.type == IB_MR_TYPE_DMA) {
488 page_offset = iova & (PAGE_SIZE - 1);
489 page = ib_virt_dma_to_page(iova);
490 } else {
491 unsigned long index;
492 int err;
493
494 err = mr_check_range(mr, iova, sizeof(value));
495 if (err) {
496 rxe_dbg_mr(mr, "iova out of range\n");
497 return RESPST_ERR_RKEY_VIOLATION;
498 }
499 page_offset = rxe_mr_iova_to_page_offset(mr, iova);
500 index = rxe_mr_iova_to_index(mr, iova);
501 page = xa_load(&mr->page_list, index);
502 if (!page)
503 return RESPST_ERR_RKEY_VIOLATION;
504 }
505
506 if (unlikely(page_offset & 0x7)) {
507 rxe_dbg_mr(mr, "iova not aligned\n");
508 return RESPST_ERR_MISALIGNED_ATOMIC;
509 }
510
511 va = kmap_local_page(page);
512
513 spin_lock_bh(&atomic_ops_lock);
514 value = *orig_val = va[page_offset >> 3];
515
516 if (opcode == IB_OPCODE_RC_COMPARE_SWAP) {
517 if (value == compare)
518 va[page_offset >> 3] = swap_add;
519 } else {
520 value += swap_add;
521 va[page_offset >> 3] = value;
522 }
523 spin_unlock_bh(&atomic_ops_lock);
524
525 kunmap_local(va);
526
527 return 0;
528 }
529
530 #if defined CONFIG_64BIT
531 /* only implemented or called for 64 bit architectures */
rxe_mr_do_atomic_write(struct rxe_mr * mr,u64 iova,u64 value)532 int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
533 {
534 unsigned int page_offset;
535 struct page *page;
536 u64 *va;
537
538 /* ODP is not supported right now. WIP. */
539 if (is_odp_mr(mr))
540 return RESPST_ERR_UNSUPPORTED_OPCODE;
541
542 /* See IBA oA19-28 */
543 if (unlikely(mr->state != RXE_MR_STATE_VALID)) {
544 rxe_dbg_mr(mr, "mr not in valid state\n");
545 return RESPST_ERR_RKEY_VIOLATION;
546 }
547
548 if (mr->ibmr.type == IB_MR_TYPE_DMA) {
549 page_offset = iova & (PAGE_SIZE - 1);
550 page = ib_virt_dma_to_page(iova);
551 } else {
552 unsigned long index;
553 int err;
554
555 /* See IBA oA19-28 */
556 err = mr_check_range(mr, iova, sizeof(value));
557 if (unlikely(err)) {
558 rxe_dbg_mr(mr, "iova out of range\n");
559 return RESPST_ERR_RKEY_VIOLATION;
560 }
561 page_offset = rxe_mr_iova_to_page_offset(mr, iova);
562 index = rxe_mr_iova_to_index(mr, iova);
563 page = xa_load(&mr->page_list, index);
564 if (!page)
565 return RESPST_ERR_RKEY_VIOLATION;
566 }
567
568 /* See IBA A19.4.2 */
569 if (unlikely(page_offset & 0x7)) {
570 rxe_dbg_mr(mr, "misaligned address\n");
571 return RESPST_ERR_MISALIGNED_ATOMIC;
572 }
573
574 va = kmap_local_page(page);
575
576 /* Do atomic write after all prior operations have completed */
577 smp_store_release(&va[page_offset >> 3], value);
578
579 kunmap_local(va);
580
581 return 0;
582 }
583 #else
rxe_mr_do_atomic_write(struct rxe_mr * mr,u64 iova,u64 value)584 int rxe_mr_do_atomic_write(struct rxe_mr *mr, u64 iova, u64 value)
585 {
586 return RESPST_ERR_UNSUPPORTED_OPCODE;
587 }
588 #endif
589
advance_dma_data(struct rxe_dma_info * dma,unsigned int length)590 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length)
591 {
592 struct rxe_sge *sge = &dma->sge[dma->cur_sge];
593 int offset = dma->sge_offset;
594 int resid = dma->resid;
595
596 while (length) {
597 unsigned int bytes;
598
599 if (offset >= sge->length) {
600 sge++;
601 dma->cur_sge++;
602 offset = 0;
603 if (dma->cur_sge >= dma->num_sge)
604 return -ENOSPC;
605 }
606
607 bytes = length;
608
609 if (bytes > sge->length - offset)
610 bytes = sge->length - offset;
611
612 offset += bytes;
613 resid -= bytes;
614 length -= bytes;
615 }
616
617 dma->sge_offset = offset;
618 dma->resid = resid;
619
620 return 0;
621 }
622
lookup_mr(struct rxe_pd * pd,int access,u32 key,enum rxe_mr_lookup_type type)623 struct rxe_mr *lookup_mr(struct rxe_pd *pd, int access, u32 key,
624 enum rxe_mr_lookup_type type)
625 {
626 struct rxe_mr *mr;
627 struct rxe_dev *rxe = to_rdev(pd->ibpd.device);
628 int index = key >> 8;
629
630 mr = rxe_pool_get_index(&rxe->mr_pool, index);
631 if (!mr)
632 return NULL;
633
634 if (unlikely((type == RXE_LOOKUP_LOCAL && mr->lkey != key) ||
635 (type == RXE_LOOKUP_REMOTE && mr->rkey != key) ||
636 mr_pd(mr) != pd || ((access & mr->access) != access) ||
637 mr->state != RXE_MR_STATE_VALID)) {
638 rxe_put(mr);
639 mr = NULL;
640 }
641
642 return mr;
643 }
644
rxe_invalidate_mr(struct rxe_qp * qp,u32 key)645 int rxe_invalidate_mr(struct rxe_qp *qp, u32 key)
646 {
647 struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
648 struct rxe_mr *mr;
649 int remote;
650 int ret;
651
652 mr = rxe_pool_get_index(&rxe->mr_pool, key >> 8);
653 if (!mr) {
654 rxe_dbg_qp(qp, "No MR for key %#x\n", key);
655 ret = -EINVAL;
656 goto err;
657 }
658
659 remote = mr->access & RXE_ACCESS_REMOTE;
660 if (remote ? (key != mr->rkey) : (key != mr->lkey)) {
661 rxe_dbg_mr(mr, "wr key (%#x) doesn't match mr key (%#x)\n",
662 key, (remote ? mr->rkey : mr->lkey));
663 ret = -EINVAL;
664 goto err_drop_ref;
665 }
666
667 if (atomic_read(&mr->num_mw) > 0) {
668 rxe_dbg_mr(mr, "Attempt to invalidate an MR while bound to MWs\n");
669 ret = -EINVAL;
670 goto err_drop_ref;
671 }
672
673 if (unlikely(mr->ibmr.type != IB_MR_TYPE_MEM_REG)) {
674 rxe_dbg_mr(mr, "Type (%d) is wrong\n", mr->ibmr.type);
675 ret = -EINVAL;
676 goto err_drop_ref;
677 }
678
679 mr->state = RXE_MR_STATE_FREE;
680 ret = 0;
681
682 err_drop_ref:
683 rxe_put(mr);
684 err:
685 return ret;
686 }
687
688 /* user can (re)register fast MR by executing a REG_MR WQE.
689 * user is expected to hold a reference on the ib mr until the
690 * WQE completes.
691 * Once a fast MR is created this is the only way to change the
692 * private keys. It is the responsibility of the user to maintain
693 * the ib mr keys in sync with rxe mr keys.
694 */
rxe_reg_fast_mr(struct rxe_qp * qp,struct rxe_send_wqe * wqe)695 int rxe_reg_fast_mr(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
696 {
697 struct rxe_mr *mr = to_rmr(wqe->wr.wr.reg.mr);
698 u32 key = wqe->wr.wr.reg.key;
699 u32 access = wqe->wr.wr.reg.access;
700
701 /* user can only register MR in free state */
702 if (unlikely(mr->state != RXE_MR_STATE_FREE)) {
703 rxe_dbg_mr(mr, "mr->lkey = 0x%x not free\n", mr->lkey);
704 return -EINVAL;
705 }
706
707 /* user can only register mr with qp in same protection domain */
708 if (unlikely(qp->ibqp.pd != mr->ibmr.pd)) {
709 rxe_dbg_mr(mr, "qp->pd and mr->pd don't match\n");
710 return -EINVAL;
711 }
712
713 /* user is only allowed to change key portion of l/rkey */
714 if (unlikely((mr->lkey & ~0xff) != (key & ~0xff))) {
715 rxe_dbg_mr(mr, "key = 0x%x has wrong index mr->lkey = 0x%x\n",
716 key, mr->lkey);
717 return -EINVAL;
718 }
719
720 mr->access = access;
721 mr->lkey = key;
722 mr->rkey = key;
723 mr->ibmr.iova = wqe->wr.wr.reg.mr->iova;
724 mr->state = RXE_MR_STATE_VALID;
725
726 return 0;
727 }
728
rxe_mr_cleanup(struct rxe_pool_elem * elem)729 void rxe_mr_cleanup(struct rxe_pool_elem *elem)
730 {
731 struct rxe_mr *mr = container_of(elem, typeof(*mr), elem);
732
733 rxe_put(mr_pd(mr));
734 ib_umem_release(mr->umem);
735
736 if (mr->ibmr.type != IB_MR_TYPE_DMA)
737 xa_destroy(&mr->page_list);
738 }
739