1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016 HGST, a Western Digital Company.
5 #include <linux/memremap.h>
6 #include <linux/moduleparam.h>
7 #include <linux/slab.h>
8 #include <linux/pci-p2pdma.h>
9 #include <rdma/mr_pool.h>
19 static bool rdma_rw_force_mr;
20 module_param_named(force_mr, rdma_rw_force_mr, bool, 0);
21 MODULE_PARM_DESC(force_mr, "Force usage of MRs for RDMA READ/WRITE operations");
24 * Report whether memory registration should be used. Memory registration must
25 * be used for iWarp devices because of iWARP-specific limitations. Memory
26 * registration is also enabled if registering memory might yield better
27 * performance than using multiple SGE entries, see rdma_rw_io_needs_mr()
29 static inline bool rdma_rw_can_use_mr(struct ib_device *dev, u32 port_num)
31 if (rdma_protocol_iwarp(dev, port_num))
33 if (dev->attrs.max_sgl_rd)
35 if (unlikely(rdma_rw_force_mr))
41 * Check if the device will use memory registration for this RW operation.
42 * For RDMA READs we must use MRs on iWarp and can optionally use them as an
43 * optimization otherwise. Additionally we have a debug option to force usage
44 * of MRs to help testing this code path.
46 static inline bool rdma_rw_io_needs_mr(struct ib_device *dev, u32 port_num,
47 enum dma_data_direction dir, int dma_nents)
49 if (dir == DMA_FROM_DEVICE) {
50 if (rdma_protocol_iwarp(dev, port_num))
52 if (dev->attrs.max_sgl_rd && dma_nents > dev->attrs.max_sgl_rd)
55 if (unlikely(rdma_rw_force_mr))
60 static inline u32 rdma_rw_fr_page_list_len(struct ib_device *dev,
66 max_pages = dev->attrs.max_pi_fast_reg_page_list_len;
68 max_pages = dev->attrs.max_fast_reg_page_list_len;
70 /* arbitrary limit to avoid allocating gigantic resources */
71 return min_t(u32, max_pages, 256);
74 static inline int rdma_rw_inv_key(struct rdma_rw_reg_ctx *reg)
78 if (reg->mr->need_inval) {
79 reg->inv_wr.opcode = IB_WR_LOCAL_INV;
80 reg->inv_wr.ex.invalidate_rkey = reg->mr->lkey;
81 reg->inv_wr.next = ®->reg_wr.wr;
84 reg->inv_wr.next = NULL;
90 /* Caller must have zero-initialized *reg. */
91 static int rdma_rw_init_one_mr(struct ib_qp *qp, u32 port_num,
92 struct rdma_rw_reg_ctx *reg, struct scatterlist *sg,
93 u32 sg_cnt, u32 offset)
95 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
97 u32 nents = min(sg_cnt, pages_per_mr);
100 reg->mr = ib_mr_pool_get(qp, &qp->rdma_mrs);
104 count += rdma_rw_inv_key(reg);
106 ret = ib_map_mr_sg(reg->mr, sg, nents, &offset, PAGE_SIZE);
107 if (ret < 0 || ret < nents) {
108 ib_mr_pool_put(qp, &qp->rdma_mrs, reg->mr);
112 reg->reg_wr.wr.opcode = IB_WR_REG_MR;
113 reg->reg_wr.mr = reg->mr;
114 reg->reg_wr.access = IB_ACCESS_LOCAL_WRITE;
115 if (rdma_protocol_iwarp(qp->device, port_num))
116 reg->reg_wr.access |= IB_ACCESS_REMOTE_WRITE;
119 reg->sge.addr = reg->mr->iova;
120 reg->sge.length = reg->mr->length;
124 static int rdma_rw_init_mr_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
125 u32 port_num, struct scatterlist *sg, u32 sg_cnt, u32 offset,
126 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
128 struct rdma_rw_reg_ctx *prev = NULL;
129 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
131 int i, j, ret = 0, count = 0;
133 ctx->nr_ops = DIV_ROUND_UP(sg_cnt, pages_per_mr);
134 ctx->reg = kcalloc(ctx->nr_ops, sizeof(*ctx->reg), GFP_KERNEL);
140 for (i = 0; i < ctx->nr_ops; i++) {
141 struct rdma_rw_reg_ctx *reg = &ctx->reg[i];
142 u32 nents = min(sg_cnt, pages_per_mr);
144 ret = rdma_rw_init_one_mr(qp, port_num, reg, sg, sg_cnt,
151 if (reg->mr->need_inval)
152 prev->wr.wr.next = ®->inv_wr;
154 prev->wr.wr.next = ®->reg_wr.wr;
157 reg->reg_wr.wr.next = ®->wr.wr;
159 reg->wr.wr.sg_list = ®->sge;
160 reg->wr.wr.num_sge = 1;
161 reg->wr.remote_addr = remote_addr;
163 if (dir == DMA_TO_DEVICE) {
164 reg->wr.wr.opcode = IB_WR_RDMA_WRITE;
165 } else if (!rdma_cap_read_inv(qp->device, port_num)) {
166 reg->wr.wr.opcode = IB_WR_RDMA_READ;
168 reg->wr.wr.opcode = IB_WR_RDMA_READ_WITH_INV;
169 reg->wr.wr.ex.invalidate_rkey = reg->mr->lkey;
173 remote_addr += reg->sge.length;
175 for (j = 0; j < nents; j++)
182 prev->wr.wr.next = NULL;
184 ctx->type = RDMA_RW_MR;
189 ib_mr_pool_put(qp, &qp->rdma_mrs, ctx->reg[i].mr);
195 static int rdma_rw_init_map_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
196 struct scatterlist *sg, u32 sg_cnt, u32 offset,
197 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
199 u32 max_sge = dir == DMA_TO_DEVICE ? qp->max_write_sge :
202 u32 total_len = 0, i, j;
204 ctx->nr_ops = DIV_ROUND_UP(sg_cnt, max_sge);
206 ctx->map.sges = sge = kcalloc(sg_cnt, sizeof(*sge), GFP_KERNEL);
210 ctx->map.wrs = kcalloc(ctx->nr_ops, sizeof(*ctx->map.wrs), GFP_KERNEL);
214 for (i = 0; i < ctx->nr_ops; i++) {
215 struct ib_rdma_wr *rdma_wr = &ctx->map.wrs[i];
216 u32 nr_sge = min(sg_cnt, max_sge);
218 if (dir == DMA_TO_DEVICE)
219 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
221 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
222 rdma_wr->remote_addr = remote_addr + total_len;
223 rdma_wr->rkey = rkey;
224 rdma_wr->wr.num_sge = nr_sge;
225 rdma_wr->wr.sg_list = sge;
227 for (j = 0; j < nr_sge; j++, sg = sg_next(sg)) {
228 sge->addr = sg_dma_address(sg) + offset;
229 sge->length = sg_dma_len(sg) - offset;
230 sge->lkey = qp->pd->local_dma_lkey;
232 total_len += sge->length;
238 rdma_wr->wr.next = i + 1 < ctx->nr_ops ?
239 &ctx->map.wrs[i + 1].wr : NULL;
242 ctx->type = RDMA_RW_MULTI_WR;
246 kfree(ctx->map.sges);
251 static int rdma_rw_init_single_wr(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
252 struct scatterlist *sg, u32 offset, u64 remote_addr, u32 rkey,
253 enum dma_data_direction dir)
255 struct ib_rdma_wr *rdma_wr = &ctx->single.wr;
259 ctx->single.sge.lkey = qp->pd->local_dma_lkey;
260 ctx->single.sge.addr = sg_dma_address(sg) + offset;
261 ctx->single.sge.length = sg_dma_len(sg) - offset;
263 memset(rdma_wr, 0, sizeof(*rdma_wr));
264 if (dir == DMA_TO_DEVICE)
265 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
267 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
268 rdma_wr->wr.sg_list = &ctx->single.sge;
269 rdma_wr->wr.num_sge = 1;
270 rdma_wr->remote_addr = remote_addr;
271 rdma_wr->rkey = rkey;
273 ctx->type = RDMA_RW_SINGLE_WR;
277 static void rdma_rw_unmap_sg(struct ib_device *dev, struct scatterlist *sg,
278 u32 sg_cnt, enum dma_data_direction dir)
280 if (is_pci_p2pdma_page(sg_page(sg)))
281 pci_p2pdma_unmap_sg(dev->dma_device, sg, sg_cnt, dir);
283 ib_dma_unmap_sg(dev, sg, sg_cnt, dir);
286 static int rdma_rw_map_sgtable(struct ib_device *dev, struct sg_table *sgt,
287 enum dma_data_direction dir)
291 if (is_pci_p2pdma_page(sg_page(sgt->sgl))) {
292 if (WARN_ON_ONCE(ib_uses_virt_dma(dev)))
294 nents = pci_p2pdma_map_sg(dev->dma_device, sgt->sgl,
295 sgt->orig_nents, dir);
301 return ib_dma_map_sgtable_attrs(dev, sgt, dir, 0);
305 * rdma_rw_ctx_init - initialize a RDMA READ/WRITE context
306 * @ctx: context to initialize
307 * @qp: queue pair to operate on
308 * @port_num: port num to which the connection is bound
309 * @sg: scatterlist to READ/WRITE from/to
310 * @sg_cnt: number of entries in @sg
311 * @sg_offset: current byte offset into @sg
312 * @remote_addr:remote address to read/write (relative to @rkey)
313 * @rkey: remote key to operate on
314 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
316 * Returns the number of WQEs that will be needed on the workqueue if
317 * successful, or a negative error code.
319 int rdma_rw_ctx_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num,
320 struct scatterlist *sg, u32 sg_cnt, u32 sg_offset,
321 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
323 struct ib_device *dev = qp->pd->device;
324 struct sg_table sgt = {
326 .orig_nents = sg_cnt,
330 ret = rdma_rw_map_sgtable(dev, &sgt, dir);
336 * Skip to the S/G entry that sg_offset falls into:
339 u32 len = sg_dma_len(sg);
350 if (WARN_ON_ONCE(sg_cnt == 0))
353 if (rdma_rw_io_needs_mr(qp->device, port_num, dir, sg_cnt)) {
354 ret = rdma_rw_init_mr_wrs(ctx, qp, port_num, sg, sg_cnt,
355 sg_offset, remote_addr, rkey, dir);
356 } else if (sg_cnt > 1) {
357 ret = rdma_rw_init_map_wrs(ctx, qp, sg, sg_cnt, sg_offset,
358 remote_addr, rkey, dir);
360 ret = rdma_rw_init_single_wr(ctx, qp, sg, sg_offset,
361 remote_addr, rkey, dir);
369 rdma_rw_unmap_sg(dev, sgt.sgl, sgt.orig_nents, dir);
372 EXPORT_SYMBOL(rdma_rw_ctx_init);
375 * rdma_rw_ctx_signature_init - initialize a RW context with signature offload
376 * @ctx: context to initialize
377 * @qp: queue pair to operate on
378 * @port_num: port num to which the connection is bound
379 * @sg: scatterlist to READ/WRITE from/to
380 * @sg_cnt: number of entries in @sg
381 * @prot_sg: scatterlist to READ/WRITE protection information from/to
382 * @prot_sg_cnt: number of entries in @prot_sg
383 * @sig_attrs: signature offloading algorithms
384 * @remote_addr:remote address to read/write (relative to @rkey)
385 * @rkey: remote key to operate on
386 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
388 * Returns the number of WQEs that will be needed on the workqueue if
389 * successful, or a negative error code.
391 int rdma_rw_ctx_signature_init(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
392 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
393 struct scatterlist *prot_sg, u32 prot_sg_cnt,
394 struct ib_sig_attrs *sig_attrs,
395 u64 remote_addr, u32 rkey, enum dma_data_direction dir)
397 struct ib_device *dev = qp->pd->device;
398 u32 pages_per_mr = rdma_rw_fr_page_list_len(qp->pd->device,
400 struct sg_table sgt = {
402 .orig_nents = sg_cnt,
404 struct sg_table prot_sgt = {
406 .orig_nents = prot_sg_cnt,
408 struct ib_rdma_wr *rdma_wr;
411 if (sg_cnt > pages_per_mr || prot_sg_cnt > pages_per_mr) {
412 pr_err("SG count too large: sg_cnt=%u, prot_sg_cnt=%u, pages_per_mr=%u\n",
413 sg_cnt, prot_sg_cnt, pages_per_mr);
417 ret = rdma_rw_map_sgtable(dev, &sgt, dir);
422 ret = rdma_rw_map_sgtable(dev, &prot_sgt, dir);
427 ctx->type = RDMA_RW_SIG_MR;
429 ctx->reg = kzalloc(sizeof(*ctx->reg), GFP_KERNEL);
432 goto out_unmap_prot_sg;
435 ctx->reg->mr = ib_mr_pool_get(qp, &qp->sig_mrs);
441 count += rdma_rw_inv_key(ctx->reg);
443 memcpy(ctx->reg->mr->sig_attrs, sig_attrs, sizeof(struct ib_sig_attrs));
445 ret = ib_map_mr_sg_pi(ctx->reg->mr, sg, sgt.nents, NULL, prot_sg,
446 prot_sgt.nents, NULL, SZ_4K);
448 pr_err("failed to map PI sg (%u)\n",
449 sgt.nents + prot_sgt.nents);
450 goto out_destroy_sig_mr;
453 ctx->reg->reg_wr.wr.opcode = IB_WR_REG_MR_INTEGRITY;
454 ctx->reg->reg_wr.wr.wr_cqe = NULL;
455 ctx->reg->reg_wr.wr.num_sge = 0;
456 ctx->reg->reg_wr.wr.send_flags = 0;
457 ctx->reg->reg_wr.access = IB_ACCESS_LOCAL_WRITE;
458 if (rdma_protocol_iwarp(qp->device, port_num))
459 ctx->reg->reg_wr.access |= IB_ACCESS_REMOTE_WRITE;
460 ctx->reg->reg_wr.mr = ctx->reg->mr;
461 ctx->reg->reg_wr.key = ctx->reg->mr->lkey;
464 ctx->reg->sge.addr = ctx->reg->mr->iova;
465 ctx->reg->sge.length = ctx->reg->mr->length;
466 if (sig_attrs->wire.sig_type == IB_SIG_TYPE_NONE)
467 ctx->reg->sge.length -= ctx->reg->mr->sig_attrs->meta_length;
469 rdma_wr = &ctx->reg->wr;
470 rdma_wr->wr.sg_list = &ctx->reg->sge;
471 rdma_wr->wr.num_sge = 1;
472 rdma_wr->remote_addr = remote_addr;
473 rdma_wr->rkey = rkey;
474 if (dir == DMA_TO_DEVICE)
475 rdma_wr->wr.opcode = IB_WR_RDMA_WRITE;
477 rdma_wr->wr.opcode = IB_WR_RDMA_READ;
478 ctx->reg->reg_wr.wr.next = &rdma_wr->wr;
484 ib_mr_pool_put(qp, &qp->sig_mrs, ctx->reg->mr);
489 rdma_rw_unmap_sg(dev, prot_sgt.sgl, prot_sgt.orig_nents, dir);
491 rdma_rw_unmap_sg(dev, sgt.sgl, sgt.orig_nents, dir);
494 EXPORT_SYMBOL(rdma_rw_ctx_signature_init);
497 * Now that we are going to post the WRs we can update the lkey and need_inval
498 * state on the MRs. If we were doing this at init time, we would get double
499 * or missing invalidations if a context was initialized but not actually
502 static void rdma_rw_update_lkey(struct rdma_rw_reg_ctx *reg, bool need_inval)
504 reg->mr->need_inval = need_inval;
505 ib_update_fast_reg_key(reg->mr, ib_inc_rkey(reg->mr->lkey));
506 reg->reg_wr.key = reg->mr->lkey;
507 reg->sge.lkey = reg->mr->lkey;
511 * rdma_rw_ctx_wrs - return chain of WRs for a RDMA READ or WRITE operation
512 * @ctx: context to operate on
513 * @qp: queue pair to operate on
514 * @port_num: port num to which the connection is bound
515 * @cqe: completion queue entry for the last WR
516 * @chain_wr: WR to append to the posted chain
518 * Return the WR chain for the set of RDMA READ/WRITE operations described by
519 * @ctx, as well as any memory registration operations needed. If @chain_wr
520 * is non-NULL the WR it points to will be appended to the chain of WRs posted.
521 * If @chain_wr is not set @cqe must be set so that the caller gets a
522 * completion notification.
524 struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
525 u32 port_num, struct ib_cqe *cqe, struct ib_send_wr *chain_wr)
527 struct ib_send_wr *first_wr, *last_wr;
533 for (i = 0; i < ctx->nr_ops; i++) {
534 rdma_rw_update_lkey(&ctx->reg[i],
535 ctx->reg[i].wr.wr.opcode !=
536 IB_WR_RDMA_READ_WITH_INV);
539 if (ctx->reg[0].inv_wr.next)
540 first_wr = &ctx->reg[0].inv_wr;
542 first_wr = &ctx->reg[0].reg_wr.wr;
543 last_wr = &ctx->reg[ctx->nr_ops - 1].wr.wr;
545 case RDMA_RW_MULTI_WR:
546 first_wr = &ctx->map.wrs[0].wr;
547 last_wr = &ctx->map.wrs[ctx->nr_ops - 1].wr;
549 case RDMA_RW_SINGLE_WR:
550 first_wr = &ctx->single.wr.wr;
551 last_wr = &ctx->single.wr.wr;
558 last_wr->next = chain_wr;
560 last_wr->wr_cqe = cqe;
561 last_wr->send_flags |= IB_SEND_SIGNALED;
566 EXPORT_SYMBOL(rdma_rw_ctx_wrs);
569 * rdma_rw_ctx_post - post a RDMA READ or RDMA WRITE operation
570 * @ctx: context to operate on
571 * @qp: queue pair to operate on
572 * @port_num: port num to which the connection is bound
573 * @cqe: completion queue entry for the last WR
574 * @chain_wr: WR to append to the posted chain
576 * Post the set of RDMA READ/WRITE operations described by @ctx, as well as
577 * any memory registration operations needed. If @chain_wr is non-NULL the
578 * WR it points to will be appended to the chain of WRs posted. If @chain_wr
579 * is not set @cqe must be set so that the caller gets a completion
582 int rdma_rw_ctx_post(struct rdma_rw_ctx *ctx, struct ib_qp *qp, u32 port_num,
583 struct ib_cqe *cqe, struct ib_send_wr *chain_wr)
585 struct ib_send_wr *first_wr;
587 first_wr = rdma_rw_ctx_wrs(ctx, qp, port_num, cqe, chain_wr);
588 return ib_post_send(qp, first_wr, NULL);
590 EXPORT_SYMBOL(rdma_rw_ctx_post);
593 * rdma_rw_ctx_destroy - release all resources allocated by rdma_rw_ctx_init
594 * @ctx: context to release
595 * @qp: queue pair to operate on
596 * @port_num: port num to which the connection is bound
597 * @sg: scatterlist that was used for the READ/WRITE
598 * @sg_cnt: number of entries in @sg
599 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
601 void rdma_rw_ctx_destroy(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
602 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
603 enum dma_data_direction dir)
609 for (i = 0; i < ctx->nr_ops; i++)
610 ib_mr_pool_put(qp, &qp->rdma_mrs, ctx->reg[i].mr);
613 case RDMA_RW_MULTI_WR:
615 kfree(ctx->map.sges);
617 case RDMA_RW_SINGLE_WR:
624 rdma_rw_unmap_sg(qp->pd->device, sg, sg_cnt, dir);
626 EXPORT_SYMBOL(rdma_rw_ctx_destroy);
629 * rdma_rw_ctx_destroy_signature - release all resources allocated by
630 * rdma_rw_ctx_signature_init
631 * @ctx: context to release
632 * @qp: queue pair to operate on
633 * @port_num: port num to which the connection is bound
634 * @sg: scatterlist that was used for the READ/WRITE
635 * @sg_cnt: number of entries in @sg
636 * @prot_sg: scatterlist that was used for the READ/WRITE of the PI
637 * @prot_sg_cnt: number of entries in @prot_sg
638 * @dir: %DMA_TO_DEVICE for RDMA WRITE, %DMA_FROM_DEVICE for RDMA READ
640 void rdma_rw_ctx_destroy_signature(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
641 u32 port_num, struct scatterlist *sg, u32 sg_cnt,
642 struct scatterlist *prot_sg, u32 prot_sg_cnt,
643 enum dma_data_direction dir)
645 if (WARN_ON_ONCE(ctx->type != RDMA_RW_SIG_MR))
648 ib_mr_pool_put(qp, &qp->sig_mrs, ctx->reg->mr);
652 rdma_rw_unmap_sg(qp->pd->device, prot_sg, prot_sg_cnt, dir);
653 rdma_rw_unmap_sg(qp->pd->device, sg, sg_cnt, dir);
655 EXPORT_SYMBOL(rdma_rw_ctx_destroy_signature);
658 * rdma_rw_mr_factor - return number of MRs required for a payload
659 * @device: device handling the connection
660 * @port_num: port num to which the connection is bound
661 * @maxpages: maximum payload pages per rdma_rw_ctx
663 * Returns the number of MRs the device requires to move @maxpayload
664 * bytes. The returned value is used during transport creation to
665 * compute max_rdma_ctxts and the size of the transport's Send and
666 * Send Completion Queues.
668 unsigned int rdma_rw_mr_factor(struct ib_device *device, u32 port_num,
669 unsigned int maxpages)
671 unsigned int mr_pages;
673 if (rdma_rw_can_use_mr(device, port_num))
674 mr_pages = rdma_rw_fr_page_list_len(device, false);
676 mr_pages = device->attrs.max_sge_rd;
677 return DIV_ROUND_UP(maxpages, mr_pages);
679 EXPORT_SYMBOL(rdma_rw_mr_factor);
681 void rdma_rw_init_qp(struct ib_device *dev, struct ib_qp_init_attr *attr)
685 WARN_ON_ONCE(attr->port_num == 0);
688 * Each context needs at least one RDMA READ or WRITE WR.
690 * For some hardware we might need more, eventually we should ask the
691 * HCA driver for a multiplier here.
696 * If the devices needs MRs to perform RDMA READ or WRITE operations,
697 * we'll need two additional MRs for the registrations and the
700 if (attr->create_flags & IB_QP_CREATE_INTEGRITY_EN ||
701 rdma_rw_can_use_mr(dev, attr->port_num))
702 factor += 2; /* inv + reg */
704 attr->cap.max_send_wr += factor * attr->cap.max_rdma_ctxs;
707 * But maybe we were just too high in the sky and the device doesn't
708 * even support all we need, and we'll have to live with what we get..
710 attr->cap.max_send_wr =
711 min_t(u32, attr->cap.max_send_wr, dev->attrs.max_qp_wr);
714 int rdma_rw_init_mrs(struct ib_qp *qp, struct ib_qp_init_attr *attr)
716 struct ib_device *dev = qp->pd->device;
717 u32 nr_mrs = 0, nr_sig_mrs = 0, max_num_sg = 0;
720 if (attr->create_flags & IB_QP_CREATE_INTEGRITY_EN) {
721 nr_sig_mrs = attr->cap.max_rdma_ctxs;
722 nr_mrs = attr->cap.max_rdma_ctxs;
723 max_num_sg = rdma_rw_fr_page_list_len(dev, true);
724 } else if (rdma_rw_can_use_mr(dev, attr->port_num)) {
725 nr_mrs = attr->cap.max_rdma_ctxs;
726 max_num_sg = rdma_rw_fr_page_list_len(dev, false);
730 ret = ib_mr_pool_init(qp, &qp->rdma_mrs, nr_mrs,
734 pr_err("%s: failed to allocated %u MRs\n",
741 ret = ib_mr_pool_init(qp, &qp->sig_mrs, nr_sig_mrs,
742 IB_MR_TYPE_INTEGRITY, max_num_sg, max_num_sg);
744 pr_err("%s: failed to allocated %u SIG MRs\n",
745 __func__, nr_sig_mrs);
746 goto out_free_rdma_mrs;
753 ib_mr_pool_destroy(qp, &qp->rdma_mrs);
757 void rdma_rw_cleanup_mrs(struct ib_qp *qp)
759 ib_mr_pool_destroy(qp, &qp->sig_mrs);
760 ib_mr_pool_destroy(qp, &qp->rdma_mrs);