--- zzzz-none-000/linux-3.10.107/net/sunrpc/xprtrdma/svc_rdma_transport.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/net/sunrpc/xprtrdma/svc_rdma_transport.c 2021-02-04 17:41:59.000000000 +0000 @@ -1,4 +1,5 @@ /* + * Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved. * Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved. * * This software is available to you under a choice of one of two @@ -55,6 +56,7 @@ #define RPCDBG_FACILITY RPCDBG_SVCXPRT +static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *, int); static struct svc_xprt *svc_rdma_create(struct svc_serv *serv, struct net *net, struct sockaddr *sa, int salen, @@ -65,6 +67,7 @@ static void svc_rdma_detach(struct svc_xprt *xprt); static void svc_rdma_free(struct svc_xprt *xprt); static int svc_rdma_has_wspace(struct svc_xprt *xprt); +static int svc_rdma_secure_port(struct svc_rqst *); static void rq_cq_reap(struct svcxprt_rdma *xprt); static void sq_cq_reap(struct svcxprt_rdma *xprt); @@ -82,26 +85,80 @@ .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, .xpo_has_wspace = svc_rdma_has_wspace, .xpo_accept = svc_rdma_accept, + .xpo_secure_port = svc_rdma_secure_port, }; struct svc_xprt_class svc_rdma_class = { .xcl_name = "rdma", .xcl_owner = THIS_MODULE, .xcl_ops = &svc_rdma_ops, - .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, + .xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA, .xcl_ident = XPRT_TRANSPORT_RDMA, }; +#if defined(CONFIG_SUNRPC_BACKCHANNEL) +static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *, struct net *, + struct sockaddr *, int, int); +static void svc_rdma_bc_detach(struct svc_xprt *); +static void svc_rdma_bc_free(struct svc_xprt *); + +static struct svc_xprt_ops svc_rdma_bc_ops = { + .xpo_create = svc_rdma_bc_create, + .xpo_detach = svc_rdma_bc_detach, + .xpo_free = svc_rdma_bc_free, + .xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr, + .xpo_secure_port = svc_rdma_secure_port, +}; + +struct svc_xprt_class svc_rdma_bc_class = { + .xcl_name = "rdma-bc", + .xcl_owner = THIS_MODULE, + .xcl_ops = &svc_rdma_bc_ops, + .xcl_max_payload = (1024 - RPCRDMA_HDRLEN_MIN) +}; + +static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *serv, + struct net *net, + struct sockaddr *sa, int salen, + int flags) +{ + struct svcxprt_rdma *cma_xprt; + struct svc_xprt *xprt; + + cma_xprt = rdma_create_xprt(serv, 0); + if (!cma_xprt) + return ERR_PTR(-ENOMEM); + xprt = &cma_xprt->sc_xprt; + + svc_xprt_init(net, &svc_rdma_bc_class, xprt, serv); + serv->sv_bc_xprt = xprt; + + dprintk("svcrdma: %s(%p)\n", __func__, xprt); + return xprt; +} + +static void svc_rdma_bc_detach(struct svc_xprt *xprt) +{ + dprintk("svcrdma: %s(%p)\n", __func__, xprt); +} + +static void svc_rdma_bc_free(struct svc_xprt *xprt) +{ + struct svcxprt_rdma *rdma = + container_of(xprt, struct svcxprt_rdma, sc_xprt); + + dprintk("svcrdma: %s(%p)\n", __func__, xprt); + if (xprt) + kfree(rdma); +} +#endif /* CONFIG_SUNRPC_BACKCHANNEL */ + struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) { struct svc_rdma_op_ctxt *ctxt; - while (1) { - ctxt = kmem_cache_alloc(svc_rdma_ctxt_cachep, GFP_KERNEL); - if (ctxt) - break; - schedule_timeout_uninterruptible(msecs_to_jiffies(500)); - } + ctxt = kmem_cache_alloc(svc_rdma_ctxt_cachep, + GFP_KERNEL | __GFP_NOFAIL); ctxt->xprt = xprt; INIT_LIST_HEAD(&ctxt->dto_q); ctxt->count = 0; @@ -136,7 +193,6 @@ struct svcxprt_rdma *xprt; int i; - BUG_ON(!ctxt); xprt = ctxt->xprt; if (free_pages) for (i = 0; i < ctxt->count; i++) @@ -154,14 +210,9 @@ struct svc_rdma_req_map *svc_rdma_get_req_map(void) { struct svc_rdma_req_map *map; - while (1) { - map = kmem_cache_alloc(svc_rdma_map_cachep, GFP_KERNEL); - if (map) - break; - schedule_timeout_uninterruptible(msecs_to_jiffies(500)); - } + map = kmem_cache_alloc(svc_rdma_map_cachep, + GFP_KERNEL | __GFP_NOFAIL); map->count = 0; - map->frmr = NULL; return map; } @@ -174,8 +225,8 @@ static void cq_event_handler(struct ib_event *event, void *context) { struct svc_xprt *xprt = context; - dprintk("svcrdma: received CQ event id=%d, context=%p\n", - event->event, context); + dprintk("svcrdma: received CQ event %s (%d), context=%p\n", + ib_event_msg(event->event), event->event, context); set_bit(XPT_CLOSE, &xprt->xpt_flags); } @@ -190,8 +241,9 @@ case IB_EVENT_COMM_EST: case IB_EVENT_SQ_DRAINED: case IB_EVENT_QP_LAST_WQE_REACHED: - dprintk("svcrdma: QP event %d received for QP=%p\n", - event->event, event->element.qp); + dprintk("svcrdma: QP event %s (%d) received for QP=%p\n", + ib_event_msg(event->event), event->event, + event->element.qp); break; /* These are considered fatal events */ case IB_EVENT_PATH_MIG_ERR: @@ -200,9 +252,10 @@ case IB_EVENT_QP_ACCESS_ERR: case IB_EVENT_DEVICE_FATAL: default: - dprintk("svcrdma: QP ERROR event %d received for QP=%p, " + dprintk("svcrdma: QP ERROR event %s (%d) received for QP=%p, " "closing transport\n", - event->event, event->element.qp); + ib_event_msg(event->event), event->event, + event->element.qp); set_bit(XPT_CLOSE, &xprt->xpt_flags); break; } @@ -337,27 +390,31 @@ switch (ctxt->wr_op) { case IB_WR_SEND: - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags)) - svc_rdma_put_frmr(xprt, ctxt->frmr); + if (ctxt->frmr) + pr_err("svcrdma: SEND: ctxt->frmr != NULL\n"); svc_rdma_put_context(ctxt, 1); break; case IB_WR_RDMA_WRITE: + if (ctxt->frmr) + pr_err("svcrdma: WRITE: ctxt->frmr != NULL\n"); svc_rdma_put_context(ctxt, 0); break; case IB_WR_RDMA_READ: case IB_WR_RDMA_READ_WITH_INV: + svc_rdma_put_frmr(xprt, ctxt->frmr); if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) { struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr; - BUG_ON(!read_hdr); - if (test_bit(RDMACTXT_F_FAST_UNREG, &ctxt->flags)) - svc_rdma_put_frmr(xprt, ctxt->frmr); - spin_lock_bh(&xprt->sc_rq_dto_lock); - set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); - list_add_tail(&read_hdr->dto_q, - &xprt->sc_read_complete_q); - spin_unlock_bh(&xprt->sc_rq_dto_lock); + if (read_hdr) { + spin_lock_bh(&xprt->sc_rq_dto_lock); + set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags); + list_add_tail(&read_hdr->dto_q, + &xprt->sc_read_complete_q); + spin_unlock_bh(&xprt->sc_rq_dto_lock); + } else { + pr_err("svcrdma: ctxt->read_hdr == NULL\n"); + } svc_xprt_enqueue(&xprt->sc_xprt); } svc_rdma_put_context(ctxt, 0); @@ -379,29 +436,43 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt) { struct svc_rdma_op_ctxt *ctxt = NULL; - struct ib_wc wc; + struct ib_wc wc_a[6]; + struct ib_wc *wc; struct ib_cq *cq = xprt->sc_sq_cq; int ret; + memset(wc_a, 0, sizeof(wc_a)); + if (!test_and_clear_bit(RDMAXPRT_SQ_PENDING, &xprt->sc_flags)) return; ib_req_notify_cq(xprt->sc_sq_cq, IB_CQ_NEXT_COMP); atomic_inc(&rdma_stat_sq_poll); - while ((ret = ib_poll_cq(cq, 1, &wc)) > 0) { - if (wc.status != IB_WC_SUCCESS) - /* Close the transport */ - set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + while ((ret = ib_poll_cq(cq, ARRAY_SIZE(wc_a), wc_a)) > 0) { + int i; - /* Decrement used SQ WR count */ - atomic_dec(&xprt->sc_sq_count); - wake_up(&xprt->sc_send_wait); + for (i = 0; i < ret; i++) { + wc = &wc_a[i]; + if (wc->status != IB_WC_SUCCESS) { + dprintk("svcrdma: sq wc err status %s (%d)\n", + ib_wc_status_msg(wc->status), + wc->status); + + /* Close the transport */ + set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags); + } - ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id; - if (ctxt) - process_context(xprt, ctxt); + /* Decrement used SQ WR count */ + atomic_dec(&xprt->sc_sq_count); + wake_up(&xprt->sc_send_wait); - svc_xprt_put(&xprt->sc_xprt); + ctxt = (struct svc_rdma_op_ctxt *) + (unsigned long)wc->wr_id; + if (ctxt) + process_context(xprt, ctxt); + + svc_xprt_put(&xprt->sc_xprt); + } } if (ctxt) @@ -472,19 +543,6 @@ return cma_xprt; } -struct page *svc_rdma_get_page(void) -{ - struct page *page; - - while ((page = alloc_page(GFP_KERNEL)) == NULL) { - /* If we can't get memory, wait a bit and try again */ - printk(KERN_INFO "svcrdma: out of memory...retrying in 1000 " - "jiffies.\n"); - schedule_timeout_uninterruptible(msecs_to_jiffies(1000)); - } - return page; -} - int svc_rdma_post_recv(struct svcxprt_rdma *xprt) { struct ib_recv_wr recv_wr, *bad_recv_wr; @@ -499,8 +557,11 @@ buflen = 0; ctxt->direction = DMA_FROM_DEVICE; for (sge_no = 0; buflen < xprt->sc_max_req_size; sge_no++) { - BUG_ON(sge_no >= xprt->sc_max_sge); - page = svc_rdma_get_page(); + if (sge_no >= xprt->sc_max_sge) { + pr_err("svcrdma: Too many sges (%d)\n", sge_no); + goto err_put_ctxt; + } + page = alloc_page(GFP_KERNEL | __GFP_NOFAIL); ctxt->pages[sge_no] = page; pa = ib_dma_map_page(xprt->sc_cm_id->device, page, 0, PAGE_SIZE, @@ -596,7 +657,8 @@ switch (event->event) { case RDMA_CM_EVENT_CONNECT_REQUEST: dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, " - "event=%d\n", cma_id, cma_id->context, event->event); + "event = %s (%d)\n", cma_id, cma_id->context, + rdma_event_msg(event->event), event->event); handle_connect_req(cma_id, event->param.conn.initiator_depth); break; @@ -616,7 +678,8 @@ default: dprintk("svcrdma: Unexpected event on listening endpoint %p, " - "event=%d\n", cma_id, event->event); + "event = %s (%d)\n", cma_id, + rdma_event_msg(event->event), event->event); break; } @@ -649,15 +712,18 @@ break; case RDMA_CM_EVENT_DEVICE_REMOVAL: dprintk("svcrdma: Device removal cma_id=%p, xprt = %p, " - "event=%d\n", cma_id, xprt, event->event); + "event = %s (%d)\n", cma_id, xprt, + rdma_event_msg(event->event), event->event); if (xprt) { set_bit(XPT_CLOSE, &xprt->xpt_flags); svc_xprt_enqueue(xprt); + svc_xprt_put(xprt); } break; default: dprintk("svcrdma: Unexpected event on DTO endpoint %p, " - "event=%d\n", cma_id, event->event); + "event = %s (%d)\n", cma_id, + rdma_event_msg(event->event), event->event); break; } return 0; @@ -673,7 +739,6 @@ { struct rdma_cm_id *listen_id; struct svcxprt_rdma *cma_xprt; - struct svc_xprt *xprt; int ret; dprintk("svcrdma: Creating RDMA socket\n"); @@ -684,10 +749,9 @@ cma_xprt = rdma_create_xprt(serv, 1); if (!cma_xprt) return ERR_PTR(-ENOMEM); - xprt = &cma_xprt->sc_xprt; - listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP, - IB_QPT_RC); + listen_id = rdma_create_id(&init_net, rdma_listen_handler, cma_xprt, + RDMA_PS_TCP, IB_QPT_RC); if (IS_ERR(listen_id)) { ret = PTR_ERR(listen_id); dprintk("svcrdma: rdma_create_id failed = %d\n", ret); @@ -726,24 +790,27 @@ static struct svc_rdma_fastreg_mr *rdma_alloc_frmr(struct svcxprt_rdma *xprt) { struct ib_mr *mr; - struct ib_fast_reg_page_list *pl; + struct scatterlist *sg; struct svc_rdma_fastreg_mr *frmr; + u32 num_sg; frmr = kmalloc(sizeof(*frmr), GFP_KERNEL); if (!frmr) goto err; - mr = ib_alloc_fast_reg_mr(xprt->sc_pd, RPCSVC_MAXPAGES); + num_sg = min_t(u32, RPCSVC_MAXPAGES, xprt->sc_frmr_pg_list_len); + mr = ib_alloc_mr(xprt->sc_pd, IB_MR_TYPE_MEM_REG, num_sg); if (IS_ERR(mr)) goto err_free_frmr; - pl = ib_alloc_fast_reg_page_list(xprt->sc_cm_id->device, - RPCSVC_MAXPAGES); - if (IS_ERR(pl)) + sg = kcalloc(RPCSVC_MAXPAGES, sizeof(*sg), GFP_KERNEL); + if (!sg) goto err_free_mr; + sg_init_table(sg, RPCSVC_MAXPAGES); + frmr->mr = mr; - frmr->page_list = pl; + frmr->sg = sg; INIT_LIST_HEAD(&frmr->frmr_list); return frmr; @@ -763,8 +830,8 @@ frmr = list_entry(xprt->sc_frmr_q.next, struct svc_rdma_fastreg_mr, frmr_list); list_del_init(&frmr->frmr_list); + kfree(frmr->sg); ib_dereg_mr(frmr->mr); - ib_free_fast_reg_page_list(frmr->page_list); kfree(frmr); } } @@ -778,8 +845,7 @@ frmr = list_entry(rdma->sc_frmr_q.next, struct svc_rdma_fastreg_mr, frmr_list); list_del_init(&frmr->frmr_list); - frmr->map_len = 0; - frmr->page_list_len = 0; + frmr->sg_nents = 0; } spin_unlock_bh(&rdma->sc_frmr_q_lock); if (frmr) @@ -788,27 +854,15 @@ return rdma_alloc_frmr(rdma); } -static void frmr_unmap_dma(struct svcxprt_rdma *xprt, - struct svc_rdma_fastreg_mr *frmr) -{ - int page_no; - for (page_no = 0; page_no < frmr->page_list_len; page_no++) { - dma_addr_t addr = frmr->page_list->page_list[page_no]; - if (ib_dma_mapping_error(frmr->mr->device, addr)) - continue; - atomic_dec(&xprt->sc_dma_used); - ib_dma_unmap_page(frmr->mr->device, addr, PAGE_SIZE, - frmr->direction); - } -} - void svc_rdma_put_frmr(struct svcxprt_rdma *rdma, struct svc_rdma_fastreg_mr *frmr) { if (frmr) { - frmr_unmap_dma(rdma, frmr); + ib_dma_unmap_sg(rdma->sc_cm_id->device, + frmr->sg, frmr->sg_nents, frmr->direction); + atomic_dec(&rdma->sc_dma_used); spin_lock_bh(&rdma->sc_frmr_q_lock); - BUG_ON(!list_empty(&frmr->frmr_list)); + WARN_ON_ONCE(!list_empty(&frmr->frmr_list)); list_add(&frmr->frmr_list, &rdma->sc_frmr_q); spin_unlock_bh(&rdma->sc_frmr_q_lock); } @@ -830,10 +884,11 @@ struct svcxprt_rdma *listen_rdma; struct svcxprt_rdma *newxprt = NULL; struct rdma_conn_param conn_param; + struct ib_cq_init_attr cq_attr = {}; struct ib_qp_init_attr qp_attr; struct ib_device_attr devattr; int uninitialized_var(dma_mr_acc); - int need_dma_mr; + int need_dma_mr = 0; int ret; int i; @@ -866,6 +921,8 @@ * capabilities of this particular device */ newxprt->sc_max_sge = min((size_t)devattr.max_sge, (size_t)RPCSVC_MAXPAGES); + newxprt->sc_max_sge_rd = min_t(size_t, devattr.max_sge_rd, + RPCSVC_MAXPAGES); newxprt->sc_max_requests = min((size_t)devattr.max_qp_wr, (size_t)svcrdma_max_requests); newxprt->sc_sq_depth = RPCRDMA_SQ_DEPTH_MULT * newxprt->sc_max_requests; @@ -882,22 +939,22 @@ dprintk("svcrdma: error creating PD for connect request\n"); goto errout; } + cq_attr.cqe = newxprt->sc_sq_depth; newxprt->sc_sq_cq = ib_create_cq(newxprt->sc_cm_id->device, sq_comp_handler, cq_event_handler, newxprt, - newxprt->sc_sq_depth, - 0); + &cq_attr); if (IS_ERR(newxprt->sc_sq_cq)) { dprintk("svcrdma: error creating SQ CQ for connect request\n"); goto errout; } + cq_attr.cqe = newxprt->sc_max_requests; newxprt->sc_rq_cq = ib_create_cq(newxprt->sc_cm_id->device, rq_comp_handler, cq_event_handler, newxprt, - newxprt->sc_max_requests, - 0); + &cq_attr); if (IS_ERR(newxprt->sc_rq_cq)) { dprintk("svcrdma: error creating RQ CQ for connect request\n"); goto errout; @@ -929,23 +986,8 @@ ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, &qp_attr); if (ret) { - /* - * XXX: This is a hack. We need a xx_request_qp interface - * that will adjust the qp_attr's with a best-effort - * number - */ - qp_attr.cap.max_send_sge -= 2; - qp_attr.cap.max_recv_sge -= 2; - ret = rdma_create_qp(newxprt->sc_cm_id, newxprt->sc_pd, - &qp_attr); - if (ret) { - dprintk("svcrdma: failed to create QP, ret=%d\n", ret); - goto errout; - } - newxprt->sc_max_sge = qp_attr.cap.max_send_sge; - newxprt->sc_max_sge = qp_attr.cap.max_recv_sge; - newxprt->sc_sq_depth = qp_attr.cap.max_send_wr; - newxprt->sc_max_requests = qp_attr.cap.max_recv_wr; + dprintk("svcrdma: failed to create QP, ret=%d\n", ret); + goto errout; } newxprt->sc_qp = newxprt->sc_cm_id->qp; @@ -971,40 +1013,37 @@ * NB: iWARP requires remote write access for the data sink * of an RDMA_READ. IB does not. */ + newxprt->sc_reader = rdma_read_chunk_lcl; if (devattr.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) { newxprt->sc_frmr_pg_list_len = devattr.max_fast_reg_page_list_len; newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_FAST_REG; + newxprt->sc_reader = rdma_read_chunk_frmr; } /* * Determine if a DMA MR is required and if so, what privs are required */ - switch (rdma_node_get_transport(newxprt->sc_cm_id->device->node_type)) { - case RDMA_TRANSPORT_IWARP: - newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_READ_W_INV; - if (!(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG)) { - need_dma_mr = 1; - dma_mr_acc = - (IB_ACCESS_LOCAL_WRITE | - IB_ACCESS_REMOTE_WRITE); - } else if (!(devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) { - need_dma_mr = 1; - dma_mr_acc = IB_ACCESS_LOCAL_WRITE; - } else - need_dma_mr = 0; - break; - case RDMA_TRANSPORT_IB: - if (!(devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) { - need_dma_mr = 1; - dma_mr_acc = IB_ACCESS_LOCAL_WRITE; - } else - need_dma_mr = 0; - break; - default: + if (!rdma_protocol_iwarp(newxprt->sc_cm_id->device, + newxprt->sc_cm_id->port_num) && + !rdma_ib_or_roce(newxprt->sc_cm_id->device, + newxprt->sc_cm_id->port_num)) goto errout; + + if (!(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG) || + !(devattr.device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY)) { + need_dma_mr = 1; + dma_mr_acc = IB_ACCESS_LOCAL_WRITE; + if (rdma_protocol_iwarp(newxprt->sc_cm_id->device, + newxprt->sc_cm_id->port_num) && + !(newxprt->sc_dev_caps & SVCRDMA_DEVCAP_FAST_REG)) + dma_mr_acc |= IB_ACCESS_REMOTE_WRITE; } + if (rdma_protocol_iwarp(newxprt->sc_cm_id->device, + newxprt->sc_cm_id->port_num)) + newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_READ_W_INV; + /* Create the DMA MR if needed, otherwise, use the DMA LKEY */ if (need_dma_mr) { /* Register all of physical memory */ @@ -1058,6 +1097,7 @@ " remote_ip : %pI4\n" " remote_port : %d\n" " max_sge : %d\n" + " max_sge_rd : %d\n" " sq_depth : %d\n" " max_requests : %d\n" " ord : %d\n", @@ -1071,6 +1111,7 @@ ntohs(((struct sockaddr_in *)&newxprt->sc_cm_id-> route.addr.dst_addr)->sin_port), newxprt->sc_max_sge, + newxprt->sc_max_sge_rd, newxprt->sc_sq_depth, newxprt->sc_max_requests, newxprt->sc_ord); @@ -1122,7 +1163,9 @@ dprintk("svcrdma: svc_rdma_free(%p)\n", rdma); /* We should only be called from kref_put */ - BUG_ON(atomic_read(&rdma->sc_xprt.xpt_ref.refcount) != 0); + if (atomic_read(&rdma->sc_xprt.xpt_ref.refcount) != 0) + pr_err("svcrdma: sc_xprt still in use? (%d)\n", + atomic_read(&rdma->sc_xprt.xpt_ref.refcount)); /* * Destroy queued, but not processed read completions. Note @@ -1150,8 +1193,12 @@ } /* Warn if we leaked a resource or under-referenced */ - WARN_ON(atomic_read(&rdma->sc_ctxt_used) != 0); - WARN_ON(atomic_read(&rdma->sc_dma_used) != 0); + if (atomic_read(&rdma->sc_ctxt_used) != 0) + pr_err("svcrdma: ctxt still in use? (%d)\n", + atomic_read(&rdma->sc_ctxt_used)); + if (atomic_read(&rdma->sc_dma_used) != 0) + pr_err("svcrdma: dma still in use? (%d)\n", + atomic_read(&rdma->sc_dma_used)); /* De-allocate fastreg mr */ rdma_dealloc_frmr_q(rdma); @@ -1192,14 +1239,7 @@ container_of(xprt, struct svcxprt_rdma, sc_xprt); /* - * If there are fewer SQ WR available than required to send a - * simple response, return false. - */ - if ((rdma->sc_sq_depth - atomic_read(&rdma->sc_sq_count) < 3)) - return 0; - - /* - * ...or there are already waiters on the SQ, + * If there are already waiters on the SQ, * return false. */ if (waitqueue_active(&rdma->sc_send_wait)) @@ -1209,38 +1249,9 @@ return 1; } -/* - * Attempt to register the kvec representing the RPC memory with the - * device. - * - * Returns: - * NULL : The device does not support fastreg or there were no more - * fastreg mr. - * frmr : The kvec register request was successfully posted. - * <0 : An error was encountered attempting to register the kvec. - */ -int svc_rdma_fastreg(struct svcxprt_rdma *xprt, - struct svc_rdma_fastreg_mr *frmr) +static int svc_rdma_secure_port(struct svc_rqst *rqstp) { - struct ib_send_wr fastreg_wr; - u8 key; - - /* Bump the key */ - key = (u8)(frmr->mr->lkey & 0x000000FF); - ib_update_fast_reg_key(frmr->mr, ++key); - - /* Prepare FASTREG WR */ - memset(&fastreg_wr, 0, sizeof fastreg_wr); - fastreg_wr.opcode = IB_WR_FAST_REG_MR; - fastreg_wr.send_flags = IB_SEND_SIGNALED; - fastreg_wr.wr.fast_reg.iova_start = (unsigned long)frmr->kva; - fastreg_wr.wr.fast_reg.page_list = frmr->page_list; - fastreg_wr.wr.fast_reg.page_list_len = frmr->page_list_len; - fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; - fastreg_wr.wr.fast_reg.length = frmr->map_len; - fastreg_wr.wr.fast_reg.access_flags = frmr->access_flags; - fastreg_wr.wr.fast_reg.rkey = frmr->mr->lkey; - return svc_rdma_send(xprt, &fastreg_wr); + return 1; } int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr) @@ -1253,7 +1264,6 @@ if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags)) return -ENOTCONN; - BUG_ON(wr->send_flags != IB_SEND_SIGNALED); wr_count = 1; for (n_wr = wr->next; n_wr; n_wr = n_wr->next) wr_count++; @@ -1307,11 +1317,11 @@ struct ib_send_wr err_wr; struct page *p; struct svc_rdma_op_ctxt *ctxt; - u32 *va; + __be32 *va; int length; int ret; - p = svc_rdma_get_page(); + p = alloc_page(GFP_KERNEL | __GFP_NOFAIL); va = page_address(p); /* XDR encode error */