1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 HGST, a Western Digital Company.
5 #include <linux/moduleparam.h>
6 #include <linux/slab.h>
7 #include <linux/pci-p2pdma.h>
8 #include <rdma/mr_pool.h>
18 static bool rdma_rw_force_mr;
19 module_param_named(force_mr, rdma_rw_force_mr, bool, 0);
20 MODULE_PARM_DESC(force_mr, "Force usage of MRs for RDMA READ/WRITE operations");
23 * Report whether memory registration should be used. Memory registration must
24 * be used for iWarp devices because of iWARP-specific limitations. Memory
25 * registration is also enabled if registering memory might yield better
26 * performance than using multiple SGE entries, see rdma_rw_io_needs_mr()
28 static inline bool rdma_rw_can_use_mr(struct ib_device *dev, u32 port_num)
30 if (rdma_protocol_iwarp(dev, port_num))
32 if (dev->attrs.max_sgl_rd)
34 if (unlikely(rdma_rw_force_mr))
40 * Check if the device will use memory registration for this RW operation.
41 * For RDMA READs we must use MRs on iWarp and can optionally use them as an
42 * optimization otherwise. Additionally we have a debug option to force usage
43 * of MRs to help testing this code path.
45 static inline bool rdma_rw_io_needs_mr(struct ib_device *dev, u32 port_num,
46 enum dma_data_direction dir, int dma_nents)
48 if (dir == DMA_FROM_DEVICE) {
49 if (rdma_protocol_iwarp(dev, port_num))
51 if (dev->attrs.max_sgl_rd && dma_nents > dev->attrs.max_sgl_rd)
54 if (unlikely(rdma_rw_force_mr))
59 static inline u32 rdma_rw_fr_page_list_len(struct ib_device *dev,
65 max_pages = dev->attrs.max_pi_fast_reg_page_list_len;
67 max_pages = dev->attrs.max_fast_reg_page_list_len;
69 /* arbitrary limit to avoid allocating gigantic resources */
70 return min_t(u32, max_pages, 256);
73 static inline int rdma_rw_inv_key(struct rdma_rw_reg_ctx *reg)
77 if (reg->mr->need_inval) {
78 reg->inv_wr.opcode = IB_WR_LOCAL_INV;
79 reg->inv_wr.ex.invalidate_rkey = reg->mr->lkey;
80 reg->inv_wr.next = ®->reg_wr.wr;
83 reg->inv_wr.next = NULL;
89 /* Caller must have zero-initialized *reg. */
90 static int rdma_rw_init_one_mr(struct ib_qp *qp, u32 port_num,
91 struct rdma_rw_reg_ctx *reg, struct scatterlist *sg,
92 u32 sg_cnt, u32 offset)
94 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
96 u32 nents = min(sg_cnt, pages_per_mr);
99 reg->mr = ib_mr_pool_get(qp, &qp->rdma_mrs);
103 count += rdma_rw_inv_key(reg);
105 ret = ib_map_mr_sg(reg->mr, sg, nents, &offset, PAGE_SIZE);
106 if (ret < 0 || ret < nents) {
107 ib_mr_pool_put(qp, &qp->rdma_mrs, reg->mr);
111 reg->reg_wr.wr.opcode = IB_WR_REG_MR;
112 reg->reg_wr.mr = reg->mr;
113 reg->reg_wr.access = IB_ACCESS_LOCAL_WRITE;
114 if (rdma_protocol_iwarp(qp->device, port_num))
115 reg->reg_wr.access |= IB_ACCESS_REMOTE_WRITE;
118 reg->sge.addr = reg->mr->iova;
119 reg->sge.length = reg->mr->length;
123 static int rdma_rw_init_mr_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
124 u32 port_num, struct scatterlist *sg, u32 sg_cnt, u32 offset,
125 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
127 struct rdma_rw_reg_ctx *prev = NULL;
128 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
130 int i, j, ret = 0, count = 0;
132 ctx->nr_ops = DIV_ROUND_UP(sg_cnt, pages_per_mr);
133 ctx->reg = kcalloc(ctx->nr_ops, sizeof(*ctx->reg), GFP_KERNEL);
139 for (i = 0; i < ctx->nr_ops; i++) {
140 struct rdma_rw_reg_ctx *reg = &ctx->reg[i];
141 u32 nents = min(sg_cnt, pages_per_mr);
143 ret = rdma_rw_init_one_mr(qp, port_num, reg, sg, sg_cnt,
150 if (reg->mr->need_inval)
151 prev->wr.wr.next = ®->inv_wr;
153 prev->wr.wr.next = ®->reg_wr.wr;
156 reg->reg_wr.wr.next = ®->wr.wr;
158 reg->wr.wr.sg_list = ®->sge;
159 reg->wr.wr.num_sge = 1;
160 reg->wr.remote_addr = remote_addr;
162 if (dir == DMA_TO_DEVICE) {
163 reg->wr.wr.opcode = IB_WR_RDMA_WRITE;
164 } else if (!rdma_cap_read_inv(qp->device, port_num)) {
165 reg->wr.wr.opcode = IB_WR_RDMA_READ;
167 reg->wr.wr.opcode = IB_WR_RDMA_READ_WITH_INV;
168 reg->wr.wr.ex.invalidate_rkey = reg->mr->lkey;
172 remote_addr += reg->sge.length;
174 for (j = 0; j < nents; j++)
181 prev->wr.wr.next = NULL;
183 ctx->type = RDMA_RW_MR;
188 ib_mr_pool_put(qp, &qp->rdma_mrs, ctx->reg[i].mr);
194 static int rdma_rw_init_map_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
195 struct scatterlist *sg, u32 sg_cnt, u32 offset,
196 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
198 u32 max_sge = dir == DMA_TO_DEVICE ? qp->max_write_sge :
201 u32 total_len = 0, i, j;
203 ctx->nr_ops = DIV_ROUND_UP(sg_cnt, max_sge);
205 ctx->map.sges = sge = kcalloc(sg_cnt, sizeof(*sge), GFP_KERNEL);
209 ctx->map.wrs = kcalloc(ctx->nr_ops, sizeof(*ctx->map.wrs), GFP_KERNEL);
213 for (i = 0; i < ctx->nr_ops; i++) {
214 struct ib_rdma_wr *rdma_wr = &ctx->map.wrs[i];
215 u32 nr_sge = min(sg_cnt, max_sge);
217 if (dir == DMA_TO_DEVICE)
218 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
220 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
221 rdma_wr->remote_addr = remote_addr + total_len;
222 rdma_wr->rkey = rkey;
223 rdma_wr->wr.num_sge = nr_sge;
224 rdma_wr->wr.sg_list = sge;
226 for (j = 0; j < nr_sge; j++, sg = sg_next(sg)) {
227 sge->addr = sg_dma_address(sg) + offset;
228 sge->length = sg_dma_len(sg) - offset;
229 sge->lkey = qp->pd->local_dma_lkey;
231 total_len += sge->length;
237 rdma_wr->wr.next = i + 1 < ctx->nr_ops ?
238 &ctx->map.wrs[i + 1].wr : NULL;
241 ctx->type = RDMA_RW_MULTI_WR;
245 kfree(ctx->map.sges);
250 static int rdma_rw_init_single_wr(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
251 struct scatterlist *sg, u32 offset, u64 remote_addr, u32 rkey,
252 enum dma_data_direction dir)
254 struct ib_rdma_wr *rdma_wr = &ctx->single.wr;
258 ctx->single.sge.lkey = qp->pd->local_dma_lkey;
259 ctx->single.sge.addr = sg_dma_address(sg) + offset;
260 ctx->single.sge.length = sg_dma_len(sg) - offset;
262 memset(rdma_wr, 0, sizeof(*rdma_wr));
263 if (dir == DMA_TO_DEVICE)
264 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
266 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
267 rdma_wr->wr.sg_list = &ctx->single.sge;
268 rdma_wr->wr.num_sge = 1;
269 rdma_wr->remote_addr = remote_addr;
270 rdma_wr->rkey = rkey;
272 ctx->type = RDMA_RW_SINGLE_WR;
276 static void rdma_rw_unmap_sg(struct ib_device *dev, struct scatterlist *sg,
277 u32 sg_cnt, enum dma_data_direction dir)
279 if (is_pci_p2pdma_page(sg_page(sg)))
280 pci_p2pdma_unmap_sg(dev->dma_device, sg, sg_cnt, dir);
282 ib_dma_unmap_sg(dev, sg, sg_cnt, dir);
285 static int rdma_rw_map_sgtable(struct ib_device *dev, struct sg_table *sgt,
286 enum dma_data_direction dir)
290 if (is_pci_p2pdma_page(sg_page(sgt->sgl))) {
291 if (WARN_ON_ONCE(ib_uses_virt_dma(dev)))
293 nents = pci_p2pdma_map_sg(dev->dma_device, sgt->sgl,
294 sgt->orig_nents, dir);
300 return ib_dma_map_sgtable_attrs(dev, sgt, dir, 0);
304 * rdma_rw_ctx_init - initialize a RDMA READ/WRITE context
305 * @ctx: context to initialize
306 * @qp: queue pair to operate on
307 * @port_num: port num to which the connection is bound
308 * @sg: scatterlist to READ/WRITE from/to
309 * @sg_cnt: number of entries in @sg
310 * @sg_offset: current byte offset into @sg
311 * @remote_addr:remote address to read/write (relative to @rkey)
312 * @rkey: remote key to operate on
313 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
315 * Returns the number of WQEs that will be needed on the workqueue if
316 * successful, or a negative error code.
318 int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num,
319 struct scatterlist *sg, u32 sg_cnt, u32 sg_offset,
320 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
322 struct ib_device *dev = qp->pd->device;
323 struct sg_table sgt = {
325 .orig_nents = sg_cnt,
329 ret = rdma_rw_map_sgtable(dev, &sgt, dir);
335 * Skip to the S/G entry that sg_offset falls into:
338 u32 len = sg_dma_len(sg);
349 if (WARN_ON_ONCE(sg_cnt == 0))
352 if (rdma_rw_io_needs_mr(qp->device, port_num, dir, sg_cnt)) {
353 ret = rdma_rw_init_mr_wrs(ctx, qp, port_num, sg, sg_cnt,
354 sg_offset, remote_addr, rkey, dir);
355 } else if (sg_cnt > 1) {
356 ret = rdma_rw_init_map_wrs(ctx, qp, sg, sg_cnt, sg_offset,
357 remote_addr, rkey, dir);
359 ret = rdma_rw_init_single_wr(ctx, qp, sg, sg_offset,
360 remote_addr, rkey, dir);
368 rdma_rw_unmap_sg(dev, sgt.sgl, sgt.orig_nents, dir);
371 EXPORT_SYMBOL(rdma_rw_ctx_init);
374 * rdma_rw_ctx_signature_init - initialize a RW context with signature offload
375 * @ctx: context to initialize
376 * @qp: queue pair to operate on
377 * @port_num: port num to which the connection is bound
378 * @sg: scatterlist to READ/WRITE from/to
379 * @sg_cnt: number of entries in @sg
380 * @prot_sg: scatterlist to READ/WRITE protection information from/to
381 * @prot_sg_cnt: number of entries in @prot_sg
382 * @sig_attrs: signature offloading algorithms
383 * @remote_addr:remote address to read/write (relative to @rkey)
384 * @rkey: remote key to operate on
385 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
387 * Returns the number of WQEs that will be needed on the workqueue if
388 * successful, or a negative error code.
390 int rdma_rw_ctx_signature_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
391 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
392 struct scatterlist *prot_sg, u32 prot_sg_cnt,
393 struct ib_sig_attrs *sig_attrs,
394 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
396 struct ib_device *dev = qp->pd->device;
397 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
399 struct sg_table sgt = {
401 .orig_nents = sg_cnt,
403 struct sg_table prot_sgt = {
405 .orig_nents = prot_sg_cnt,
407 struct ib_rdma_wr *rdma_wr;
410 if (sg_cnt > pages_per_mr || prot_sg_cnt > pages_per_mr) {
411 pr_err("SG count too large: sg_cnt=%u, prot_sg_cnt=%u, pages_per_mr=%u\n",
412 sg_cnt, prot_sg_cnt, pages_per_mr);
416 ret = rdma_rw_map_sgtable(dev, &sgt, dir);
421 ret = rdma_rw_map_sgtable(dev, &prot_sgt, dir);
426 ctx->type = RDMA_RW_SIG_MR;
428 ctx->reg = kzalloc(sizeof(*ctx->reg), GFP_KERNEL);
431 goto out_unmap_prot_sg;
434 ctx->reg->mr = ib_mr_pool_get(qp, &qp->sig_mrs);
440 count += rdma_rw_inv_key(ctx->reg);
442 memcpy(ctx->reg->mr->sig_attrs, sig_attrs, sizeof(struct ib_sig_attrs));
444 ret = ib_map_mr_sg_pi(ctx->reg->mr, sg, sgt.nents, NULL, prot_sg,
445 prot_sgt.nents, NULL, SZ_4K);
447 pr_err("failed to map PI sg (%u)\n",
448 sgt.nents + prot_sgt.nents);
449 goto out_destroy_sig_mr;
452 ctx->reg->reg_wr.wr.opcode = IB_WR_REG_MR_INTEGRITY;
453 ctx->reg->reg_wr.wr.wr_cqe = NULL;
454 ctx->reg->reg_wr.wr.num_sge = 0;
455 ctx->reg->reg_wr.wr.send_flags = 0;
456 ctx->reg->reg_wr.access = IB_ACCESS_LOCAL_WRITE;
457 if (rdma_protocol_iwarp(qp->device, port_num))
458 ctx->reg->reg_wr.access |= IB_ACCESS_REMOTE_WRITE;
459 ctx->reg->reg_wr.mr = ctx->reg->mr;
460 ctx->reg->reg_wr.key = ctx->reg->mr->lkey;
463 ctx->reg->sge.addr = ctx->reg->mr->iova;
464 ctx->reg->sge.length = ctx->reg->mr->length;
465 if (sig_attrs->wire.sig_type == IB_SIG_TYPE_NONE)
466 ctx->reg->sge.length -= ctx->reg->mr->sig_attrs->meta_length;
468 rdma_wr = &ctx->reg->wr;
469 rdma_wr->wr.sg_list = &ctx->reg->sge;
470 rdma_wr->wr.num_sge = 1;
471 rdma_wr->remote_addr = remote_addr;
472 rdma_wr->rkey = rkey;
473 if (dir == DMA_TO_DEVICE)
474 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
476 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
477 ctx->reg->reg_wr.wr.next = &rdma_wr->wr;
483 ib_mr_pool_put(qp, &qp->sig_mrs, ctx->reg->mr);
488 rdma_rw_unmap_sg(dev, prot_sgt.sgl, prot_sgt.orig_nents, dir);
490 rdma_rw_unmap_sg(dev, sgt.sgl, sgt.orig_nents, dir);
493 EXPORT_SYMBOL(rdma_rw_ctx_signature_init);
496 * Now that we are going to post the WRs we can update the lkey and need_inval
497 * state on the MRs. If we were doing this at init time, we would get double
498 * or missing invalidations if a context was initialized but not actually
501 static void rdma_rw_update_lkey(struct rdma_rw_reg_ctx *reg, bool need_inval)
503 reg->mr->need_inval = need_inval;
504 ib_update_fast_reg_key(reg->mr, ib_inc_rkey(reg->mr->lkey));
505 reg->reg_wr.key = reg->mr->lkey;
506 reg->sge.lkey = reg->mr->lkey;
510 * rdma_rw_ctx_wrs - return chain of WRs for a RDMA READ or WRITE operation
511 * @ctx: context to operate on
512 * @qp: queue pair to operate on
513 * @port_num: port num to which the connection is bound
514 * @cqe: completion queue entry for the last WR
515 * @chain_wr: WR to append to the posted chain
517 * Return the WR chain for the set of RDMA READ/WRITE operations described by
518 * @ctx, as well as any memory registration operations needed. If @chain_wr
519 * is non-NULL the WR it points to will be appended to the chain of WRs posted.
520 * If @chain_wr is not set @cqe must be set so that the caller gets a
521 * completion notification.
523 struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
524 u32 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr)
526 struct ib_send_wr *first_wr, *last_wr;
532 for (i = 0; i < ctx->nr_ops; i++) {
533 rdma_rw_update_lkey(&ctx->reg[i],
534 ctx->reg[i].wr.wr.opcode !=
535 IB_WR_RDMA_READ_WITH_INV);
538 if (ctx->reg[0].inv_wr.next)
539 first_wr = &ctx->reg[0].inv_wr;
541 first_wr = &ctx->reg[0].reg_wr.wr;
542 last_wr = &ctx->reg[ctx->nr_ops - 1].wr.wr;
544 case RDMA_RW_MULTI_WR:
545 first_wr = &ctx->map.wrs[0].wr;
546 last_wr = &ctx->map.wrs[ctx->nr_ops - 1].wr;
548 case RDMA_RW_SINGLE_WR:
549 first_wr = &ctx->single.wr.wr;
550 last_wr = &ctx->single.wr.wr;
557 last_wr->next = chain_wr;
559 last_wr->wr_cqe = cqe;
560 last_wr->send_flags |= IB_SEND_SIGNALED;
565 EXPORT_SYMBOL(rdma_rw_ctx_wrs);
568 * rdma_rw_ctx_post - post a RDMA READ or RDMA WRITE operation
569 * @ctx: context to operate on
570 * @qp: queue pair to operate on
571 * @port_num: port num to which the connection is bound
572 * @cqe: completion queue entry for the last WR
573 * @chain_wr: WR to append to the posted chain
575 * Post the set of RDMA READ/WRITE operations described by @ctx, as well as
576 * any memory registration operations needed. If @chain_wr is non-NULL the
577 * WR it points to will be appended to the chain of WRs posted. If @chain_wr
578 * is not set @cqe must be set so that the caller gets a completion
581 int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num,
582 struct ib_cqe *cqe, struct ib_send_wr *chain_wr)
584 struct ib_send_wr *first_wr;
586 first_wr = rdma_rw_ctx_wrs(ctx, qp, port_num, cqe, chain_wr);
587 return ib_post_send(qp, first_wr, NULL);
589 EXPORT_SYMBOL(rdma_rw_ctx_post);
592 * rdma_rw_ctx_destroy - release all resources allocated by rdma_rw_ctx_init
593 * @ctx: context to release
594 * @qp: queue pair to operate on
595 * @port_num: port num to which the connection is bound
596 * @sg: scatterlist that was used for the READ/WRITE
597 * @sg_cnt: number of entries in @sg
598 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
600 void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
601 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
602 enum dma_data_direction dir)
608 for (i = 0; i < ctx->nr_ops; i++)
609 ib_mr_pool_put(qp, &qp->rdma_mrs, ctx->reg[i].mr);
612 case RDMA_RW_MULTI_WR:
614 kfree(ctx->map.sges);
616 case RDMA_RW_SINGLE_WR:
623 rdma_rw_unmap_sg(qp->pd->device, sg, sg_cnt, dir);
625 EXPORT_SYMBOL(rdma_rw_ctx_destroy);
628 * rdma_rw_ctx_destroy_signature - release all resources allocated by
629 * rdma_rw_ctx_signature_init
630 * @ctx: context to release
631 * @qp: queue pair to operate on
632 * @port_num: port num to which the connection is bound
633 * @sg: scatterlist that was used for the READ/WRITE
634 * @sg_cnt: number of entries in @sg
635 * @prot_sg: scatterlist that was used for the READ/WRITE of the PI
636 * @prot_sg_cnt: number of entries in @prot_sg
637 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
639 void rdma_rw_ctx_destroy_signature(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
640 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
641 struct scatterlist *prot_sg, u32 prot_sg_cnt,
642 enum dma_data_direction dir)
644 if (WARN_ON_ONCE(ctx->type != RDMA_RW_SIG_MR))
647 ib_mr_pool_put(qp, &qp->sig_mrs, ctx->reg->mr);
651 rdma_rw_unmap_sg(qp->pd->device, prot_sg, prot_sg_cnt, dir);
652 rdma_rw_unmap_sg(qp->pd->device, sg, sg_cnt, dir);
654 EXPORT_SYMBOL(rdma_rw_ctx_destroy_signature);
657 * rdma_rw_mr_factor - return number of MRs required for a payload
658 * @device: device handling the connection
659 * @port_num: port num to which the connection is bound
660 * @maxpages: maximum payload pages per rdma_rw_ctx
662 * Returns the number of MRs the device requires to move @maxpayload
663 * bytes. The returned value is used during transport creation to
664 * compute max_rdma_ctxts and the size of the transport's Send and
665 * Send Completion Queues.
667 unsigned int rdma_rw_mr_factor(struct ib_device *device, u32 port_num,
668 unsigned int maxpages)
670 unsigned int mr_pages;
672 if (rdma_rw_can_use_mr(device, port_num))
673 mr_pages = rdma_rw_fr_page_list_len(device, false);
675 mr_pages = device->attrs.max_sge_rd;
676 return DIV_ROUND_UP(maxpages, mr_pages);
678 EXPORT_SYMBOL(rdma_rw_mr_factor);
680 void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr)
684 WARN_ON_ONCE(attr->port_num == 0);
687 * Each context needs at least one RDMA READ or WRITE WR.
689 * For some hardware we might need more, eventually we should ask the
690 * HCA driver for a multiplier here.
695 * If the devices needs MRs to perform RDMA READ or WRITE operations,
696 * we'll need two additional MRs for the registrations and the
699 if (attr->create_flags & IB_QP_CREATE_INTEGRITY_EN ||
700 rdma_rw_can_use_mr(dev, attr->port_num))
701 factor += 2; /* inv + reg */
703 attr->cap.max_send_wr += factor * attr->cap.max_rdma_ctxs;
706 * But maybe we were just too high in the sky and the device doesn't
707 * even support all we need, and we'll have to live with what we get..
709 attr->cap.max_send_wr =
710 min_t(u32, attr->cap.max_send_wr, dev->attrs.max_qp_wr);
713 int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr)
715 struct ib_device *dev = qp->pd->device;
716 u32 nr_mrs = 0, nr_sig_mrs = 0, max_num_sg = 0;
719 if (attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) {
720 nr_sig_mrs = attr->cap.max_rdma_ctxs;
721 nr_mrs = attr->cap.max_rdma_ctxs;
722 max_num_sg = rdma_rw_fr_page_list_len(dev, true);
723 } else if (rdma_rw_can_use_mr(dev, attr->port_num)) {
724 nr_mrs = attr->cap.max_rdma_ctxs;
725 max_num_sg = rdma_rw_fr_page_list_len(dev, false);
729 ret = ib_mr_pool_init(qp, &qp->rdma_mrs, nr_mrs,
733 pr_err("%s: failed to allocated %u MRs\n",
740 ret = ib_mr_pool_init(qp, &qp->sig_mrs, nr_sig_mrs,
741 IB_MR_TYPE_INTEGRITY, max_num_sg, max_num_sg);
743 pr_err("%s: failed to allocated %u SIG MRs\n",
744 __func__, nr_sig_mrs);
745 goto out_free_rdma_mrs;
752 ib_mr_pool_destroy(qp, &qp->rdma_mrs);
756 void rdma_rw_cleanup_mrs(struct ib_qp *qp)
758 ib_mr_pool_destroy(qp, &qp->sig_mrs);
759 ib_mr_pool_destroy(qp, &qp->rdma_mrs);