From 7cf20fc62428367bbf853a8d968804a6ec6a4973 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 3 Mar 2016 09:36:06 +0100 Subject: net/9p: convert to new CQ API Trivial conversion to the new RDMA CQ API. Signed-off-by: Christoph Hellwig Acked-by: Dominique Martinet Signed-off-by: Doug Ledford --- net/9p/trans_rdma.c | 86 +++++++++++++++++++---------------------------------- 1 file changed, 31 insertions(+), 55 deletions(-) diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index 52b4a2f993f2..1852e383afd6 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -109,14 +109,13 @@ struct p9_trans_rdma { /** * p9_rdma_context - Keeps track of in-process WR * - * @wc_op: The original WR op for when the CQE completes in error. * @busa: Bus address to unmap when the WR completes * @req: Keeps track of requests (send) * @rc: Keepts track of replies (receive) */ struct p9_rdma_req; struct p9_rdma_context { - enum ib_wc_opcode wc_op; + struct ib_cqe cqe; dma_addr_t busa; union { struct p9_req_t *req; @@ -284,9 +283,12 @@ p9_cm_event_handler(struct rdma_cm_id *id, struct rdma_cm_event *event) } static void -handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma, - struct p9_rdma_context *c, enum ib_wc_status status, u32 byte_len) +recv_done(struct ib_cq *cq, struct ib_wc *wc) { + struct p9_client *client = cq->cq_context; + struct p9_trans_rdma *rdma = client->trans; + struct p9_rdma_context *c = + container_of(wc->wr_cqe, struct p9_rdma_context, cqe); struct p9_req_t *req; int err = 0; int16_t tag; @@ -295,7 +297,7 @@ handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma, ib_dma_unmap_single(rdma->cm_id->device, c->busa, client->msize, DMA_FROM_DEVICE); - if (status != IB_WC_SUCCESS) + if (wc->status != IB_WC_SUCCESS) goto err_out; err = p9_parse_header(c->rc, NULL, NULL, &tag, 1); @@ -316,21 +318,32 @@ handle_recv(struct p9_client *client, struct p9_trans_rdma *rdma, req->rc = c->rc; p9_client_cb(client, req, REQ_STATUS_RCVD); + out: + up(&rdma->rq_sem); + kfree(c); return; err_out: - p9_debug(P9_DEBUG_ERROR, "req %p err %d status %d\n", req, err, status); + p9_debug(P9_DEBUG_ERROR, "req %p err %d status %d\n", + req, err, wc->status); rdma->state = P9_RDMA_FLUSHING; client->status = Disconnected; + goto out; } static void -handle_send(struct p9_client *client, struct p9_trans_rdma *rdma, - struct p9_rdma_context *c, enum ib_wc_status status, u32 byte_len) +send_done(struct ib_cq *cq, struct ib_wc *wc) { + struct p9_client *client = cq->cq_context; + struct p9_trans_rdma *rdma = client->trans; + struct p9_rdma_context *c = + container_of(wc->wr_cqe, struct p9_rdma_context, cqe); + ib_dma_unmap_single(rdma->cm_id->device, c->busa, c->req->tc->size, DMA_TO_DEVICE); + up(&rdma->sq_sem); + kfree(c); } static void qp_event_handler(struct ib_event *event, void *context) @@ -339,42 +352,6 @@ static void qp_event_handler(struct ib_event *event, void *context) event->event, context); } -static void cq_comp_handler(struct ib_cq *cq, void *cq_context) -{ - struct p9_client *client = cq_context; - struct p9_trans_rdma *rdma = client->trans; - int ret; - struct ib_wc wc; - - ib_req_notify_cq(rdma->cq, IB_CQ_NEXT_COMP); - while ((ret = ib_poll_cq(cq, 1, &wc)) > 0) { - struct p9_rdma_context *c = (void *) (unsigned long) wc.wr_id; - - switch (c->wc_op) { - case IB_WC_RECV: - handle_recv(client, rdma, c, wc.status, wc.byte_len); - up(&rdma->rq_sem); - break; - - case IB_WC_SEND: - handle_send(client, rdma, c, wc.status, wc.byte_len); - up(&rdma->sq_sem); - break; - - default: - pr_err("unexpected completion type, c->wc_op=%d, wc.opcode=%d, status=%d\n", - c->wc_op, wc.opcode, wc.status); - break; - } - kfree(c); - } -} - -static void cq_event_handler(struct ib_event *e, void *v) -{ - p9_debug(P9_DEBUG_ERROR, "CQ event %d context %p\n", e->event, v); -} - static void rdma_destroy_trans(struct p9_trans_rdma *rdma) { if (!rdma) @@ -387,7 +364,7 @@ static void rdma_destroy_trans(struct p9_trans_rdma *rdma) ib_dealloc_pd(rdma->pd); if (rdma->cq && !IS_ERR(rdma->cq)) - ib_destroy_cq(rdma->cq); + ib_free_cq(rdma->cq); if (rdma->cm_id && !IS_ERR(rdma->cm_id)) rdma_destroy_id(rdma->cm_id); @@ -408,13 +385,14 @@ post_recv(struct p9_client *client, struct p9_rdma_context *c) if (ib_dma_mapping_error(rdma->cm_id->device, c->busa)) goto error; + c->cqe.done = recv_done; + sge.addr = c->busa; sge.length = client->msize; sge.lkey = rdma->pd->local_dma_lkey; wr.next = NULL; - c->wc_op = IB_WC_RECV; - wr.wr_id = (unsigned long) c; + wr.wr_cqe = &c->cqe; wr.sg_list = &sge; wr.num_sge = 1; return ib_post_recv(rdma->qp, &wr, &bad_wr); @@ -499,13 +477,14 @@ dont_need_post_recv: goto send_error; } + c->cqe.done = send_done; + sge.addr = c->busa; sge.length = c->req->tc->size; sge.lkey = rdma->pd->local_dma_lkey; wr.next = NULL; - c->wc_op = IB_WC_SEND; - wr.wr_id = (unsigned long) c; + wr.wr_cqe = &c->cqe; wr.opcode = IB_WR_SEND; wr.send_flags = IB_SEND_SIGNALED; wr.sg_list = &sge; @@ -642,7 +621,6 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args) struct p9_trans_rdma *rdma; struct rdma_conn_param conn_param; struct ib_qp_init_attr qp_attr; - struct ib_cq_init_attr cq_attr = {}; /* Parse the transport specific mount options */ err = parse_opts(args, &opts); @@ -695,13 +673,11 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args) goto error; /* Create the Completion Queue */ - cq_attr.cqe = opts.sq_depth + opts.rq_depth + 1; - rdma->cq = ib_create_cq(rdma->cm_id->device, cq_comp_handler, - cq_event_handler, client, - &cq_attr); + rdma->cq = ib_alloc_cq(rdma->cm_id->device, client, + opts.sq_depth + opts.rq_depth + 1, + 0, IB_POLL_SOFTIRQ); if (IS_ERR(rdma->cq)) goto error; - ib_req_notify_cq(rdma->cq, IB_CQ_NEXT_COMP); /* Create the Protection Domain */ rdma->pd = ib_alloc_pd(rdma->cm_id->device); -- cgit v1.2.3