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
55 struct rpc_rdma_cid *cid = &mr->mr_cid; in frwr_cid_init()
57 cid->ci_queue_id = ep->re_attr.send_cq->res.id; in frwr_cid_init()
58 cid->ci_completion_id = mr->mr_ibmr->res.id; in frwr_cid_init()
63 if (mr->mr_device) { in frwr_mr_unmap()
65 ib_dma_unmap_sg(mr->mr_device, mr->mr_sg, mr->mr_nents, in frwr_mr_unmap()
66 mr->mr_dir); in frwr_mr_unmap()
67 mr->mr_device = NULL; in frwr_mr_unmap()
72 * frwr_mr_release - Destroy one MR
80 frwr_mr_unmap(mr->mr_xprt, mr); in frwr_mr_release()
82 rc = ib_dereg_mr(mr->mr_ibmr); in frwr_mr_release()
85 kfree(mr->mr_sg); in frwr_mr_release()
91 frwr_mr_unmap(mr->mr_xprt, mr); in frwr_mr_put()
94 * of to the xprt's MR free list. No spinlock is needed. in frwr_mr_put()
96 rpcrdma_mr_push(mr, &mr->mr_req->rl_free_mrs); in frwr_mr_put()
99 /* frwr_reset - Place MRs back on the free list
113 while ((mr = rpcrdma_mr_pop(&req->rl_registered))) in frwr_reset()
118 * frwr_mr_init - Initialize one MR
127 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_mr_init()
128 unsigned int depth = ep->re_max_fr_depth; in frwr_mr_init()
133 frmr = ib_alloc_mr(ep->re_pd, ep->re_mrtype, depth); in frwr_mr_init()
141 mr->mr_xprt = r_xprt; in frwr_mr_init()
142 mr->mr_ibmr = frmr; in frwr_mr_init()
143 mr->mr_device = NULL; in frwr_mr_init()
144 INIT_LIST_HEAD(&mr->mr_list); in frwr_mr_init()
145 init_completion(&mr->mr_linv_done); in frwr_mr_init()
149 mr->mr_sg = sg; in frwr_mr_init()
159 return -ENOMEM; in frwr_mr_init()
163 * frwr_query_device - Prepare a transport for use with FRWR
168 * ep->re_attr
169 * ep->re_max_requests
170 * ep->re_max_rdma_segs
171 * ep->re_max_fr_depth
172 * ep->re_mrtype
176 * %-EINVAL - the device does not support FRWR memory registration
177 * %-ENOMEM - the device is not sufficiently capable for NFS/RDMA
181 const struct ib_device_attr *attrs = &device->attrs; in frwr_query_device()
185 if (!(attrs->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) || in frwr_query_device()
186 attrs->max_fast_reg_page_list_len == 0) { in frwr_query_device()
188 device->name); in frwr_query_device()
189 return -EINVAL; in frwr_query_device()
192 max_sge = min_t(unsigned int, attrs->max_send_sge, in frwr_query_device()
196 return -ENOMEM; in frwr_query_device()
198 ep->re_attr.cap.max_send_sge = max_sge; in frwr_query_device()
199 ep->re_attr.cap.max_recv_sge = 1; in frwr_query_device()
201 ep->re_mrtype = IB_MR_TYPE_MEM_REG; in frwr_query_device()
202 if (attrs->device_cap_flags & IB_DEVICE_SG_GAPS_REG) in frwr_query_device()
203 ep->re_mrtype = IB_MR_TYPE_SG_GAPS; in frwr_query_device()
209 if (attrs->max_sge_rd > RPCRDMA_MAX_HDR_SEGS) in frwr_query_device()
210 ep->re_max_fr_depth = attrs->max_sge_rd; in frwr_query_device()
212 ep->re_max_fr_depth = attrs->max_fast_reg_page_list_len; in frwr_query_device()
213 if (ep->re_max_fr_depth > RPCRDMA_MAX_DATA_SEGS) in frwr_query_device()
214 ep->re_max_fr_depth = RPCRDMA_MAX_DATA_SEGS; in frwr_query_device()
230 if (ep->re_max_fr_depth < RPCRDMA_MAX_DATA_SEGS) { in frwr_query_device()
231 delta = RPCRDMA_MAX_DATA_SEGS - ep->re_max_fr_depth; in frwr_query_device()
234 delta -= ep->re_max_fr_depth; in frwr_query_device()
238 max_qp_wr = attrs->max_qp_wr; in frwr_query_device()
239 max_qp_wr -= RPCRDMA_BACKWARD_WRS; in frwr_query_device()
240 max_qp_wr -= 1; in frwr_query_device()
242 return -ENOMEM; in frwr_query_device()
243 if (ep->re_max_requests > max_qp_wr) in frwr_query_device()
244 ep->re_max_requests = max_qp_wr; in frwr_query_device()
245 ep->re_attr.cap.max_send_wr = ep->re_max_requests * depth; in frwr_query_device()
246 if (ep->re_attr.cap.max_send_wr > max_qp_wr) { in frwr_query_device()
247 ep->re_max_requests = max_qp_wr / depth; in frwr_query_device()
248 if (!ep->re_max_requests) in frwr_query_device()
249 return -ENOMEM; in frwr_query_device()
250 ep->re_attr.cap.max_send_wr = ep->re_max_requests * depth; in frwr_query_device()
252 ep->re_attr.cap.max_send_wr += RPCRDMA_BACKWARD_WRS; in frwr_query_device()
253 ep->re_attr.cap.max_send_wr += 1; /* for ib_drain_sq */ in frwr_query_device()
254 ep->re_attr.cap.max_recv_wr = ep->re_max_requests; in frwr_query_device()
255 ep->re_attr.cap.max_recv_wr += RPCRDMA_BACKWARD_WRS; in frwr_query_device()
256 ep->re_attr.cap.max_recv_wr += RPCRDMA_MAX_RECV_BATCH; in frwr_query_device()
257 ep->re_attr.cap.max_recv_wr += 1; /* for ib_drain_rq */ in frwr_query_device()
259 ep->re_max_rdma_segs = in frwr_query_device()
260 DIV_ROUND_UP(RPCRDMA_MAX_DATA_SEGS, ep->re_max_fr_depth); in frwr_query_device()
262 ep->re_max_rdma_segs += 2; in frwr_query_device()
263 if (ep->re_max_rdma_segs > RPCRDMA_MAX_HDR_SEGS) in frwr_query_device()
264 ep->re_max_rdma_segs = RPCRDMA_MAX_HDR_SEGS; in frwr_query_device()
271 if ((ep->re_max_rdma_segs * ep->re_max_fr_depth) < RPCRDMA_MAX_SEGS) in frwr_query_device()
272 return -ENOMEM; in frwr_query_device()
278 * frwr_map - Register a memory region
280 * @seg: memory region co-ordinates
283 * @xid: XID of RPC using the registered memory
286 * Prepare a REG_MR Work Request to register a memory region
297 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_map()
303 if (nsegs > ep->re_max_fr_depth) in frwr_map()
304 nsegs = ep->re_max_fr_depth; in frwr_map()
306 sg_set_page(&mr->mr_sg[i], seg->mr_page, in frwr_map()
307 seg->mr_len, seg->mr_offset); in frwr_map()
311 if (ep->re_mrtype == IB_MR_TYPE_SG_GAPS) in frwr_map()
313 if ((i < nsegs && seg->mr_offset) || in frwr_map()
314 offset_in_page((seg-1)->mr_offset + (seg-1)->mr_len)) in frwr_map()
317 mr->mr_dir = rpcrdma_data_dir(writing); in frwr_map()
318 mr->mr_nents = i; in frwr_map()
320 dma_nents = ib_dma_map_sg(ep->re_id->device, mr->mr_sg, mr->mr_nents, in frwr_map()
321 mr->mr_dir); in frwr_map()
324 mr->mr_device = ep->re_id->device; in frwr_map()
326 ibmr = mr->mr_ibmr; in frwr_map()
327 n = ib_map_mr_sg(ibmr, mr->mr_sg, dma_nents, NULL, PAGE_SIZE); in frwr_map()
331 ibmr->iova &= 0x00000000ffffffff; in frwr_map()
332 ibmr->iova |= ((u64)be32_to_cpu(xid)) << 32; in frwr_map()
333 key = (u8)(ibmr->rkey & 0x000000FF); in frwr_map()
336 reg_wr = &mr->mr_regwr; in frwr_map()
337 reg_wr->mr = ibmr; in frwr_map()
338 reg_wr->key = ibmr->rkey; in frwr_map()
339 reg_wr->access = writing ? in frwr_map()
343 mr->mr_handle = ibmr->rkey; in frwr_map()
344 mr->mr_length = ibmr->length; in frwr_map()
345 mr->mr_offset = ibmr->iova; in frwr_map()
352 return ERR_PTR(-EIO); in frwr_map()
356 return ERR_PTR(-EIO); in frwr_map()
360 * frwr_wc_fastreg - Invoked by RDMA provider for a flushed FastReg WC
362 * @wc: WCE for a completed FastReg WR
366 static void frwr_wc_fastreg(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_fastreg() argument
368 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_fastreg()
372 trace_xprtrdma_wc_fastreg(wc, &mr->mr_cid); in frwr_wc_fastreg()
374 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_fastreg()
378 * frwr_send - post Send WRs containing the RPC Call message
383 * single ib_post_send call is needed to register memory
393 struct ib_send_wr *post_wr, *send_wr = &req->rl_wr; in frwr_send()
394 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_send()
401 list_for_each_entry(mr, &req->rl_registered, mr_list) { in frwr_send()
404 mr->mr_cqe.done = frwr_wc_fastreg; in frwr_send()
405 mr->mr_regwr.wr.next = post_wr; in frwr_send()
406 mr->mr_regwr.wr.wr_cqe = &mr->mr_cqe; in frwr_send()
407 mr->mr_regwr.wr.num_sge = 0; in frwr_send()
408 mr->mr_regwr.wr.opcode = IB_WR_REG_MR; in frwr_send()
409 mr->mr_regwr.wr.send_flags = 0; in frwr_send()
410 post_wr = &mr->mr_regwr.wr; in frwr_send()
414 if ((kref_read(&req->rl_kref) > 1) || num_wrs > ep->re_send_count) { in frwr_send()
415 send_wr->send_flags |= IB_SEND_SIGNALED; in frwr_send()
416 ep->re_send_count = min_t(unsigned int, ep->re_send_batch, in frwr_send()
417 num_wrs - ep->re_send_count); in frwr_send()
419 send_wr->send_flags &= ~IB_SEND_SIGNALED; in frwr_send()
420 ep->re_send_count -= num_wrs; in frwr_send()
424 ret = ib_post_send(ep->re_id->qp, post_wr, NULL); in frwr_send()
431 * frwr_reminv - handle a remotely invalidated mr on the @mrs list
441 if (mr->mr_handle == rep->rr_inv_rkey) { in frwr_reminv()
442 list_del_init(&mr->mr_list); in frwr_reminv()
449 static void frwr_mr_done(struct ib_wc *wc, struct rpcrdma_mr *mr) in frwr_mr_done() argument
451 if (likely(wc->status == IB_WC_SUCCESS)) in frwr_mr_done()
456 * frwr_wc_localinv - Invoked by RDMA provider for a LOCAL_INV WC
458 * @wc: WCE for a completed LocalInv WR
461 static void frwr_wc_localinv(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv() argument
463 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv()
467 trace_xprtrdma_wc_li(wc, &mr->mr_cid); in frwr_wc_localinv()
468 frwr_mr_done(wc, mr); in frwr_wc_localinv()
470 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv()
474 * frwr_wc_localinv_wake - Invoked by RDMA provider for a LOCAL_INV WC
476 * @wc: WCE for a completed LocalInv WR
480 static void frwr_wc_localinv_wake(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv_wake() argument
482 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv_wake()
486 trace_xprtrdma_wc_li_wake(wc, &mr->mr_cid); in frwr_wc_localinv_wake()
487 frwr_mr_done(wc, mr); in frwr_wc_localinv_wake()
488 complete(&mr->mr_linv_done); in frwr_wc_localinv_wake()
490 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv_wake()
494 * frwr_unmap_sync - invalidate memory regions that were registered for @req
496 * @req: rpcrdma_req with a non-empty list of MRs to process
499 * memory regions. This guarantees that registered MRs are properly fenced
507 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_unmap_sync()
518 while ((mr = rpcrdma_mr_pop(&req->rl_registered))) { in frwr_unmap_sync()
521 r_xprt->rx_stats.local_inv_needed++; in frwr_unmap_sync()
523 last = &mr->mr_invwr; in frwr_unmap_sync()
524 last->next = NULL; in frwr_unmap_sync()
525 last->wr_cqe = &mr->mr_cqe; in frwr_unmap_sync()
526 last->sg_list = NULL; in frwr_unmap_sync()
527 last->num_sge = 0; in frwr_unmap_sync()
528 last->opcode = IB_WR_LOCAL_INV; in frwr_unmap_sync()
529 last->send_flags = IB_SEND_SIGNALED; in frwr_unmap_sync()
530 last->ex.invalidate_rkey = mr->mr_handle; in frwr_unmap_sync()
532 last->wr_cqe->done = frwr_wc_localinv; in frwr_unmap_sync()
535 prev = &last->next; in frwr_unmap_sync()
543 last->wr_cqe->done = frwr_wc_localinv_wake; in frwr_unmap_sync()
544 reinit_completion(&mr->mr_linv_done); in frwr_unmap_sync()
548 * unless re_id->qp is a valid pointer. in frwr_unmap_sync()
551 rc = ib_post_send(ep->re_id->qp, first, &bad_wr); in frwr_unmap_sync()
558 wait_for_completion(&mr->mr_linv_done); in frwr_unmap_sync()
571 * frwr_wc_localinv_done - Invoked by RDMA provider for a signaled LOCAL_INV WC
573 * @wc: WCE for a completed LocalInv WR
576 static void frwr_wc_localinv_done(struct ib_cq *cq, struct ib_wc *wc) in frwr_wc_localinv_done() argument
578 struct ib_cqe *cqe = wc->wr_cqe; in frwr_wc_localinv_done()
583 trace_xprtrdma_wc_li_done(wc, &mr->mr_cid); in frwr_wc_localinv_done()
586 rep = mr->mr_req->rl_reply; in frwr_wc_localinv_done()
589 if (wc->status != IB_WC_SUCCESS) { in frwr_wc_localinv_done()
592 rpcrdma_flush_disconnect(cq->cq_context, wc); in frwr_wc_localinv_done()
600 * frwr_unmap_async - invalidate memory regions that were registered for @req
602 * @req: rpcrdma_req with a non-empty list of MRs to process
612 struct rpcrdma_ep *ep = r_xprt->rx_ep; in frwr_unmap_async()
620 while ((mr = rpcrdma_mr_pop(&req->rl_registered))) { in frwr_unmap_async()
623 r_xprt->rx_stats.local_inv_needed++; in frwr_unmap_async()
625 last = &mr->mr_invwr; in frwr_unmap_async()
626 last->next = NULL; in frwr_unmap_async()
627 last->wr_cqe = &mr->mr_cqe; in frwr_unmap_async()
628 last->sg_list = NULL; in frwr_unmap_async()
629 last->num_sge = 0; in frwr_unmap_async()
630 last->opcode = IB_WR_LOCAL_INV; in frwr_unmap_async()
631 last->send_flags = IB_SEND_SIGNALED; in frwr_unmap_async()
632 last->ex.invalidate_rkey = mr->mr_handle; in frwr_unmap_async()
634 last->wr_cqe->done = frwr_wc_localinv; in frwr_unmap_async()
637 prev = &last->next; in frwr_unmap_async()
645 last->wr_cqe->done = frwr_wc_localinv_done; in frwr_unmap_async()
649 * unless re_id->qp is a valid pointer. in frwr_unmap_async()
651 rc = ib_post_send(ep->re_id->qp, first, NULL); in frwr_unmap_async()
663 rpcrdma_unpin_rqst(req->rl_reply); in frwr_unmap_async()