Lines Matching +full:no +full:- +full:memory +full:- +full:wc
1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
7 /* Lightweight memory registration using Fast Registration Work
11 * of arbitrarily-sized memory regions. This is the fastest and safest
12 * but most complex memory registration mode.
17 * A Memory Region is prepared for RDMA Read or Write using a FAST_REG
19 * Memory Region is invalidated using a LOCAL_INV Work Request
32 * send lock, just as ->send_request does. This prevents frwr_map and
51 struct rpc_rdma_cid *cid = &mr->mr_cid; in frwr_cid_init()
53 cid->ci_queue_id = ep->re_attr.send_cq->res.id; in frwr_cid_init()
54 cid->ci_completion_id = mr->mr_ibmr->res.id; in frwr_cid_init()
59 if (mr->mr_device) { in frwr_mr_unmap()
61 ib_dma_unmap_sg(mr->mr_device, mr->mr_sg, mr->mr_nents, in frwr_mr_unmap()
62 mr->mr_dir); in frwr_mr_unmap()
63 mr->mr_device = NULL; in frwr_mr_unmap()
68 * frwr_mr_release - Destroy one MR
78 rc = ib_dereg_mr(mr->mr_ibmr); in frwr_mr_release()
81 kfree(mr->mr_sg); in frwr_mr_release()
90 * of to the xprt's MR free list. No spinlock is needed. in frwr_mr_put()
92 rpcrdma_mr_push(mr, &mr->mr_req->rl_free_mrs); in frwr_mr_put()
96 * frwr_reset - Place MRs back on @req's free list
110 while ((mr = rpcrdma_mr_pop(&req->rl_registered))) in frwr_reset()
115 * frwr_mr_init - Initialize one MR
124 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_mr_init()
125 unsigned int depth = ep->re_max_fr_depth; in frwr_mr_init()
130 ibdev_to_node(ep->re_id->device)); in frwr_mr_init()
132 return -ENOMEM; in frwr_mr_init()
134 frmr = ib_alloc_mr(ep->re_pd, ep->re_mrtype, depth); in frwr_mr_init()
138 mr->mr_xprt = r_xprt; in frwr_mr_init()
139 mr->mr_ibmr = frmr; in frwr_mr_init()
140 mr->mr_device = NULL; in frwr_mr_init()
141 INIT_LIST_HEAD(&mr->mr_list); in frwr_mr_init()
142 init_completion(&mr->mr_linv_done); in frwr_mr_init()
146 mr->mr_sg = sg; in frwr_mr_init()
156 * frwr_query_device - Prepare a transport for use with FRWR
161 * ep->re_attr
162 * ep->re_max_requests
163 * ep->re_max_rdma_segs
164 * ep->re_max_fr_depth
165 * ep->re_mrtype
169 * %-EINVAL - the device does not support FRWR memory registration
170 * %-ENOMEM - the device is not sufficiently capable for NFS/RDMA
174 const struct ib_device_attr *attrs = &device->attrs; in frwr_query_device()
178 if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) || in frwr_query_device()
179 attrs->max_fast_reg_page_list_len == 0) { in frwr_query_device()
181 device->name); in frwr_query_device()
182 return -EINVAL; in frwr_query_device()
185 max_sge = min_t(unsigned int, attrs->max_send_sge, in frwr_query_device()
189 return -ENOMEM; in frwr_query_device()
191 ep->re_attr.cap.max_send_sge = max_sge; in frwr_query_device()
192 ep->re_attr.cap.max_recv_sge = 1; in frwr_query_device()
194 ep->re_mrtype = IB_MR_TYPE_MEM_REG; in frwr_query_device()
195 if (attrs->kernel_cap_flags & IBK_SG_GAPS_REG) in frwr_query_device()
196 ep->re_mrtype = IB_MR_TYPE_SG_GAPS; in frwr_query_device()
202 if (attrs->max_sge_rd > RPCRDMA_MAX_HDR_SEGS) in frwr_query_device()
203 ep->re_max_fr_depth = attrs->max_sge_rd; in frwr_query_device()
205 ep->re_max_fr_depth = attrs->max_fast_reg_page_list_len; in frwr_query_device()
206 if (ep->re_max_fr_depth > RPCRDMA_MAX_DATA_SEGS) in frwr_query_device()
207 ep->re_max_fr_depth = RPCRDMA_MAX_DATA_SEGS; in frwr_query_device()
223 if (ep->re_max_fr_depth < RPCRDMA_MAX_DATA_SEGS) { in frwr_query_device()
224 delta = RPCRDMA_MAX_DATA_SEGS - ep->re_max_fr_depth; in frwr_query_device()
227 delta -= ep->re_max_fr_depth; in frwr_query_device()
231 max_qp_wr = attrs->max_qp_wr; in frwr_query_device()
232 max_qp_wr -= RPCRDMA_BACKWARD_WRS; in frwr_query_device()
233 max_qp_wr -= 1; in frwr_query_device()
235 return -ENOMEM; in frwr_query_device()
236 if (ep->re_max_requests > max_qp_wr) in frwr_query_device()
237 ep->re_max_requests = max_qp_wr; in frwr_query_device()
238 ep->re_attr.cap.max_send_wr = ep->re_max_requests * depth; in frwr_query_device()
239 if (ep->re_attr.cap.max_send_wr > max_qp_wr) { in frwr_query_device()
240 ep->re_max_requests = max_qp_wr / depth; in frwr_query_device()
241 if (!ep->re_max_requests) in frwr_query_device()
242 return -ENOMEM; in frwr_query_device()
243 ep->re_attr.cap.max_send_wr = ep->re_max_requests * depth; in frwr_query_device()
245 ep->re_attr.cap.max_send_wr += RPCRDMA_BACKWARD_WRS; in frwr_query_device()
246 ep->re_attr.cap.max_send_wr += 1; /* for ib_drain_sq */ in frwr_query_device()
247 ep->re_attr.cap.max_recv_wr = ep->re_max_requests; in frwr_query_device()
248 ep->re_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS; in frwr_query_device()
249 ep->re_attr.cap.max_recv_wr += RPCRDMA_MAX_RECV_BATCH; in frwr_query_device()
250 ep->re_attr.cap.max_recv_wr += 1; /* for ib_drain_rq */ in frwr_query_device()
252 ep->re_max_rdma_segs = in frwr_query_device()
253 DIV_ROUND_UP(RPCRDMA_MAX_DATA_SEGS, ep->re_max_fr_depth); in frwr_query_device()
255 ep->re_max_rdma_segs += 2; in frwr_query_device()
256 if (ep->re_max_rdma_segs > RPCRDMA_MAX_HDR_SEGS) in frwr_query_device()
257 ep->re_max_rdma_segs = RPCRDMA_MAX_HDR_SEGS; in frwr_query_device()
264 if ((ep->re_max_rdma_segs * ep->re_max_fr_depth) < RPCRDMA_MAX_SEGS) in frwr_query_device()
265 return -ENOMEM; in frwr_query_device()
271 * frwr_map - Register a memory region
273 * @seg: memory region co-ordinates
276 * @xid: XID of RPC using the registered memory
279 * Prepare a REG_MR Work Request to register a memory region
290 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_map()
296 if (nsegs > ep->re_max_fr_depth) in frwr_map()
297 nsegs = ep->re_max_fr_depth; in frwr_map()
299 sg_set_page(&mr->mr_sg[i], seg->mr_page, in frwr_map()
300 seg->mr_len, seg->mr_offset); in frwr_map()
304 if (ep->re_mrtype == IB_MR_TYPE_SG_GAPS) in frwr_map()
306 if ((i < nsegs && seg->mr_offset) || in frwr_map()
307 offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) in frwr_map()
310 mr->mr_dir = rpcrdma_data_dir(writing); in frwr_map()
311 mr->mr_nents = i; in frwr_map()
313 dma_nents = ib_dma_map_sg(ep->re_id->device, mr->mr_sg, mr->mr_nents, in frwr_map()
314 mr->mr_dir); in frwr_map()
317 mr->mr_device = ep->re_id->device; in frwr_map()
319 ibmr = mr->mr_ibmr; in frwr_map()
320 n = ib_map_mr_sg(ibmr, mr->mr_sg, dma_nents, NULL, PAGE_SIZE); in frwr_map()
324 ibmr->iova &= 0x00000000ffffffff; in frwr_map()
325 ibmr->iova |= ((u64)be32_to_cpu(xid)) << 32; in frwr_map()
326 key = (u8)(ibmr->rkey & 0x000000FF); in frwr_map()
329 reg_wr = &mr->mr_regwr; in frwr_map()
330 reg_wr->mr = ibmr; in frwr_map()
331 reg_wr->key = ibmr->rkey; in frwr_map()
332 reg_wr->access = writing ? in frwr_map()
336 mr->mr_handle = ibmr->rkey; in frwr_map()
337 mr->mr_length = ibmr->length; in frwr_map()
338 mr->mr_offset = ibmr->iova; in frwr_map()
345 return ERR_PTR(-EIO); in frwr_map()
349 return ERR_PTR(-EIO); in frwr_map()
353 * frwr_wc_fastreg - Invoked by RDMA provider for a flushed FastReg WC
355 * @wc: WCE for a completed FastReg WR
359 static void frwr_wc_fastreg(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_fastreg() argument
361 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_fastreg()
365 trace_xprtrdma_wc_fastreg(wc, &mr->mr_cid); in frwr_wc_fastreg()
367 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_fastreg()
371 * frwr_send - post Send WRs containing the RPC Call message
376 * single ib_post_send call is needed to register memory
386 struct ib_send_wr *post_wr, *send_wr = &req->rl_wr; in frwr_send()
387 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_send()
394 list_for_each_entry(mr, &req->rl_registered, mr_list) { in frwr_send()
397 mr->mr_cqe.done = frwr_wc_fastreg; in frwr_send()
398 mr->mr_regwr.wr.next = post_wr; in frwr_send()
399 mr->mr_regwr.wr.wr_cqe = &mr->mr_cqe; in frwr_send()
400 mr->mr_regwr.wr.num_sge = 0; in frwr_send()
401 mr->mr_regwr.wr.opcode = IB_WR_REG_MR; in frwr_send()
402 mr->mr_regwr.wr.send_flags = 0; in frwr_send()
403 post_wr = &mr->mr_regwr.wr; in frwr_send()
407 if ((kref_read(&req->rl_kref) > 1) || num_wrs > ep->re_send_count) { in frwr_send()
408 send_wr->send_flags |= IB_SEND_SIGNALED; in frwr_send()
409 ep->re_send_count = min_t(unsigned int, ep->re_send_batch, in frwr_send()
410 num_wrs - ep->re_send_count); in frwr_send()
412 send_wr->send_flags &= ~IB_SEND_SIGNALED; in frwr_send()
413 ep->re_send_count -= num_wrs; in frwr_send()
417 ret = ib_post_send(ep->re_id->qp, post_wr, NULL); in frwr_send()
424 * frwr_reminv - handle a remotely invalidated mr on the @mrs list
434 if (mr->mr_handle == rep->rr_inv_rkey) { in frwr_reminv()
435 list_del_init(&mr->mr_list); in frwr_reminv()
442 static void frwr_mr_done(struct ib_wc *wc, struct rpcrdma_mr *mr) in frwr_mr_done() argument
444 if (likely(wc->status == IB_WC_SUCCESS)) in frwr_mr_done()
449 * frwr_wc_localinv - Invoked by RDMA provider for a LOCAL_INV WC
451 * @wc: WCE for a completed LocalInv WR
454 static void frwr_wc_localinv(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv() argument
456 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv()
460 trace_xprtrdma_wc_li(wc, &mr->mr_cid); in frwr_wc_localinv()
461 frwr_mr_done(wc, mr); in frwr_wc_localinv()
463 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv()
467 * frwr_wc_localinv_wake - Invoked by RDMA provider for a LOCAL_INV WC
469 * @wc: WCE for a completed LocalInv WR
473 static void frwr_wc_localinv_wake(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv_wake() argument
475 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv_wake()
479 trace_xprtrdma_wc_li_wake(wc, &mr->mr_cid); in frwr_wc_localinv_wake()
480 frwr_mr_done(wc, mr); in frwr_wc_localinv_wake()
481 complete(&mr->mr_linv_done); in frwr_wc_localinv_wake()
483 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv_wake()
487 * frwr_unmap_sync - invalidate memory regions that were registered for @req
489 * @req: rpcrdma_req with a non-empty list of MRs to process
492 * memory regions. This guarantees that registered MRs are properly fenced
500 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_unmap_sync()
511 mr = rpcrdma_mr_pop(&req->rl_registered); in frwr_unmap_sync()
514 r_xprt->rx_stats.local_inv_needed++; in frwr_unmap_sync()
516 last = &mr->mr_invwr; in frwr_unmap_sync()
517 last->next = NULL; in frwr_unmap_sync()
518 last->wr_cqe = &mr->mr_cqe; in frwr_unmap_sync()
519 last->sg_list = NULL; in frwr_unmap_sync()
520 last->num_sge = 0; in frwr_unmap_sync()
521 last->opcode = IB_WR_LOCAL_INV; in frwr_unmap_sync()
522 last->send_flags = IB_SEND_SIGNALED; in frwr_unmap_sync()
523 last->ex.invalidate_rkey = mr->mr_handle; in frwr_unmap_sync()
525 last->wr_cqe->done = frwr_wc_localinv; in frwr_unmap_sync()
528 prev = &last->next; in frwr_unmap_sync()
529 } while ((mr = rpcrdma_mr_pop(&req->rl_registered))); in frwr_unmap_sync()
537 last->wr_cqe->done = frwr_wc_localinv_wake; in frwr_unmap_sync()
538 reinit_completion(&mr->mr_linv_done); in frwr_unmap_sync()
542 * unless re_id->qp is a valid pointer. in frwr_unmap_sync()
545 rc = ib_post_send(ep->re_id->qp, first, &bad_wr); in frwr_unmap_sync()
552 wait_for_completion(&mr->mr_linv_done); in frwr_unmap_sync()
565 * frwr_wc_localinv_done - Invoked by RDMA provider for a signaled LOCAL_INV WC
567 * @wc: WCE for a completed LocalInv WR
570 static void frwr_wc_localinv_done(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv_done() argument
572 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv_done()
577 trace_xprtrdma_wc_li_done(wc, &mr->mr_cid); in frwr_wc_localinv_done()
580 rep = mr->mr_req->rl_reply; in frwr_wc_localinv_done()
583 if (wc->status != IB_WC_SUCCESS) { in frwr_wc_localinv_done()
586 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv_done()
594 * frwr_unmap_async - invalidate memory regions that were registered for @req
596 * @req: rpcrdma_req with a non-empty list of MRs to process
606 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_unmap_async()
614 mr = rpcrdma_mr_pop(&req->rl_registered); in frwr_unmap_async()
617 r_xprt->rx_stats.local_inv_needed++; in frwr_unmap_async()
619 last = &mr->mr_invwr; in frwr_unmap_async()
620 last->next = NULL; in frwr_unmap_async()
621 last->wr_cqe = &mr->mr_cqe; in frwr_unmap_async()
622 last->sg_list = NULL; in frwr_unmap_async()
623 last->num_sge = 0; in frwr_unmap_async()
624 last->opcode = IB_WR_LOCAL_INV; in frwr_unmap_async()
625 last->send_flags = IB_SEND_SIGNALED; in frwr_unmap_async()
626 last->ex.invalidate_rkey = mr->mr_handle; in frwr_unmap_async()
628 last->wr_cqe->done = frwr_wc_localinv; in frwr_unmap_async()
631 prev = &last->next; in frwr_unmap_async()
632 } while ((mr = rpcrdma_mr_pop(&req->rl_registered))); in frwr_unmap_async()
639 last->wr_cqe->done = frwr_wc_localinv_done; in frwr_unmap_async()
643 * unless re_id->qp is a valid pointer. in frwr_unmap_async()
645 rc = ib_post_send(ep->re_id->qp, first, NULL); in frwr_unmap_async()
657 rpcrdma_unpin_rqst(req->rl_reply); in frwr_unmap_async()
665 * frwr_wp_create - Create an MR for padding Write chunks
672 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_wp_create()
678 return -EAGAIN; in frwr_wp_create()
679 mr->mr_req = NULL; in frwr_wp_create()
680 ep->re_write_pad_mr = mr; in frwr_wp_create()
683 seg.mr_page = virt_to_page(ep->re_write_pad); in frwr_wp_create()
684 seg.mr_offset = offset_in_page(ep->re_write_pad); in frwr_wp_create()
686 return -EIO; in frwr_wp_create()
689 mr->mr_cqe.done = frwr_wc_fastreg; in frwr_wp_create()
690 mr->mr_regwr.wr.next = NULL; in frwr_wp_create()
691 mr->mr_regwr.wr.wr_cqe = &mr->mr_cqe; in frwr_wp_create()
692 mr->mr_regwr.wr.num_sge = 0; in frwr_wp_create()
693 mr->mr_regwr.wr.opcode = IB_WR_REG_MR; in frwr_wp_create()
694 mr->mr_regwr.wr.send_flags = 0; in frwr_wp_create()
696 return ib_post_send(ep->re_id->qp, &mr->mr_regwr.wr, NULL); in frwr_wp_create()