1353 строки
37 KiB
C
1353 строки
37 KiB
C
/*
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* Copyright (c) 2014 Open Grid Computing, Inc. All rights reserved.
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* Copyright (c) 2005-2007 Network Appliance, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the BSD-type
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* Neither the name of the Network Appliance, Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Tom Tucker <tom@opengridcomputing.com>
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*/
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#include <linux/sunrpc/svc_xprt.h>
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#include <linux/sunrpc/addr.h>
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#include <linux/sunrpc/debug.h>
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#include <linux/sunrpc/rpc_rdma.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include <linux/sunrpc/svc_rdma.h>
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#include <linux/export.h>
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#include "xprt_rdma.h"
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#define RPCDBG_FACILITY RPCDBG_SVCXPRT
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static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *, int);
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static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
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struct net *net,
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struct sockaddr *sa, int salen,
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int flags);
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static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt);
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static void svc_rdma_release_rqst(struct svc_rqst *);
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static void svc_rdma_detach(struct svc_xprt *xprt);
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static void svc_rdma_free(struct svc_xprt *xprt);
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static int svc_rdma_has_wspace(struct svc_xprt *xprt);
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static int svc_rdma_secure_port(struct svc_rqst *);
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static void svc_rdma_kill_temp_xprt(struct svc_xprt *);
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static struct svc_xprt_ops svc_rdma_ops = {
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.xpo_create = svc_rdma_create,
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.xpo_recvfrom = svc_rdma_recvfrom,
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.xpo_sendto = svc_rdma_sendto,
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.xpo_release_rqst = svc_rdma_release_rqst,
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.xpo_detach = svc_rdma_detach,
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.xpo_free = svc_rdma_free,
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.xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr,
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.xpo_has_wspace = svc_rdma_has_wspace,
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.xpo_accept = svc_rdma_accept,
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.xpo_secure_port = svc_rdma_secure_port,
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.xpo_kill_temp_xprt = svc_rdma_kill_temp_xprt,
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};
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struct svc_xprt_class svc_rdma_class = {
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.xcl_name = "rdma",
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.xcl_owner = THIS_MODULE,
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.xcl_ops = &svc_rdma_ops,
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.xcl_max_payload = RPCSVC_MAXPAYLOAD_RDMA,
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.xcl_ident = XPRT_TRANSPORT_RDMA,
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};
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#if defined(CONFIG_SUNRPC_BACKCHANNEL)
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static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *, struct net *,
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struct sockaddr *, int, int);
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static void svc_rdma_bc_detach(struct svc_xprt *);
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static void svc_rdma_bc_free(struct svc_xprt *);
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static struct svc_xprt_ops svc_rdma_bc_ops = {
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.xpo_create = svc_rdma_bc_create,
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.xpo_detach = svc_rdma_bc_detach,
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.xpo_free = svc_rdma_bc_free,
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.xpo_prep_reply_hdr = svc_rdma_prep_reply_hdr,
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.xpo_secure_port = svc_rdma_secure_port,
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};
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struct svc_xprt_class svc_rdma_bc_class = {
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.xcl_name = "rdma-bc",
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.xcl_owner = THIS_MODULE,
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.xcl_ops = &svc_rdma_bc_ops,
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.xcl_max_payload = (1024 - RPCRDMA_HDRLEN_MIN)
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};
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static struct svc_xprt *svc_rdma_bc_create(struct svc_serv *serv,
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struct net *net,
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struct sockaddr *sa, int salen,
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int flags)
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{
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struct svcxprt_rdma *cma_xprt;
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struct svc_xprt *xprt;
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cma_xprt = rdma_create_xprt(serv, 0);
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if (!cma_xprt)
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return ERR_PTR(-ENOMEM);
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xprt = &cma_xprt->sc_xprt;
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svc_xprt_init(net, &svc_rdma_bc_class, xprt, serv);
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set_bit(XPT_CONG_CTRL, &xprt->xpt_flags);
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serv->sv_bc_xprt = xprt;
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dprintk("svcrdma: %s(%p)\n", __func__, xprt);
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return xprt;
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}
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static void svc_rdma_bc_detach(struct svc_xprt *xprt)
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{
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dprintk("svcrdma: %s(%p)\n", __func__, xprt);
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}
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static void svc_rdma_bc_free(struct svc_xprt *xprt)
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{
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struct svcxprt_rdma *rdma =
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container_of(xprt, struct svcxprt_rdma, sc_xprt);
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dprintk("svcrdma: %s(%p)\n", __func__, xprt);
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if (xprt)
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kfree(rdma);
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}
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#endif /* CONFIG_SUNRPC_BACKCHANNEL */
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static struct svc_rdma_op_ctxt *alloc_ctxt(struct svcxprt_rdma *xprt,
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gfp_t flags)
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{
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struct svc_rdma_op_ctxt *ctxt;
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ctxt = kmalloc(sizeof(*ctxt), flags);
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if (ctxt) {
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ctxt->xprt = xprt;
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INIT_LIST_HEAD(&ctxt->list);
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}
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return ctxt;
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}
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static bool svc_rdma_prealloc_ctxts(struct svcxprt_rdma *xprt)
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{
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unsigned int i;
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/* Each RPC/RDMA credit can consume a number of send
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* and receive WQEs. One ctxt is allocated for each.
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*/
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i = xprt->sc_sq_depth + xprt->sc_rq_depth;
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while (i--) {
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struct svc_rdma_op_ctxt *ctxt;
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ctxt = alloc_ctxt(xprt, GFP_KERNEL);
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if (!ctxt) {
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dprintk("svcrdma: No memory for RDMA ctxt\n");
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return false;
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}
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list_add(&ctxt->list, &xprt->sc_ctxts);
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}
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return true;
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}
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struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt)
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{
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struct svc_rdma_op_ctxt *ctxt = NULL;
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spin_lock(&xprt->sc_ctxt_lock);
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xprt->sc_ctxt_used++;
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if (list_empty(&xprt->sc_ctxts))
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goto out_empty;
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ctxt = list_first_entry(&xprt->sc_ctxts,
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struct svc_rdma_op_ctxt, list);
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list_del(&ctxt->list);
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spin_unlock(&xprt->sc_ctxt_lock);
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out:
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ctxt->count = 0;
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ctxt->mapped_sges = 0;
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ctxt->frmr = NULL;
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return ctxt;
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out_empty:
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/* Either pre-allocation missed the mark, or send
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* queue accounting is broken.
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*/
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spin_unlock(&xprt->sc_ctxt_lock);
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ctxt = alloc_ctxt(xprt, GFP_NOIO);
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if (ctxt)
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goto out;
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spin_lock(&xprt->sc_ctxt_lock);
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xprt->sc_ctxt_used--;
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spin_unlock(&xprt->sc_ctxt_lock);
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WARN_ONCE(1, "svcrdma: empty RDMA ctxt list?\n");
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return NULL;
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}
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void svc_rdma_unmap_dma(struct svc_rdma_op_ctxt *ctxt)
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{
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struct svcxprt_rdma *xprt = ctxt->xprt;
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struct ib_device *device = xprt->sc_cm_id->device;
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u32 lkey = xprt->sc_pd->local_dma_lkey;
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unsigned int i;
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for (i = 0; i < ctxt->mapped_sges; i++) {
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/*
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* Unmap the DMA addr in the SGE if the lkey matches
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* the local_dma_lkey, otherwise, ignore it since it is
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* an FRMR lkey and will be unmapped later when the
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* last WR that uses it completes.
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*/
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if (ctxt->sge[i].lkey == lkey)
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ib_dma_unmap_page(device,
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ctxt->sge[i].addr,
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ctxt->sge[i].length,
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ctxt->direction);
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}
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ctxt->mapped_sges = 0;
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}
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void svc_rdma_put_context(struct svc_rdma_op_ctxt *ctxt, int free_pages)
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{
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struct svcxprt_rdma *xprt = ctxt->xprt;
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int i;
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if (free_pages)
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for (i = 0; i < ctxt->count; i++)
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put_page(ctxt->pages[i]);
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spin_lock(&xprt->sc_ctxt_lock);
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xprt->sc_ctxt_used--;
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list_add(&ctxt->list, &xprt->sc_ctxts);
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spin_unlock(&xprt->sc_ctxt_lock);
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}
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static void svc_rdma_destroy_ctxts(struct svcxprt_rdma *xprt)
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{
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while (!list_empty(&xprt->sc_ctxts)) {
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struct svc_rdma_op_ctxt *ctxt;
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ctxt = list_first_entry(&xprt->sc_ctxts,
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struct svc_rdma_op_ctxt, list);
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list_del(&ctxt->list);
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kfree(ctxt);
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}
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}
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static struct svc_rdma_req_map *alloc_req_map(gfp_t flags)
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{
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struct svc_rdma_req_map *map;
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map = kmalloc(sizeof(*map), flags);
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if (map)
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INIT_LIST_HEAD(&map->free);
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return map;
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}
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static bool svc_rdma_prealloc_maps(struct svcxprt_rdma *xprt)
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{
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unsigned int i;
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/* One for each receive buffer on this connection. */
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i = xprt->sc_max_requests;
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while (i--) {
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struct svc_rdma_req_map *map;
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map = alloc_req_map(GFP_KERNEL);
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if (!map) {
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dprintk("svcrdma: No memory for request map\n");
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return false;
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}
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list_add(&map->free, &xprt->sc_maps);
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}
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return true;
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}
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struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *xprt)
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{
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struct svc_rdma_req_map *map = NULL;
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spin_lock(&xprt->sc_map_lock);
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if (list_empty(&xprt->sc_maps))
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goto out_empty;
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map = list_first_entry(&xprt->sc_maps,
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struct svc_rdma_req_map, free);
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list_del_init(&map->free);
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spin_unlock(&xprt->sc_map_lock);
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out:
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map->count = 0;
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return map;
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out_empty:
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spin_unlock(&xprt->sc_map_lock);
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/* Pre-allocation amount was incorrect */
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map = alloc_req_map(GFP_NOIO);
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if (map)
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goto out;
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WARN_ONCE(1, "svcrdma: empty request map list?\n");
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return NULL;
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}
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void svc_rdma_put_req_map(struct svcxprt_rdma *xprt,
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struct svc_rdma_req_map *map)
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{
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spin_lock(&xprt->sc_map_lock);
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list_add(&map->free, &xprt->sc_maps);
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spin_unlock(&xprt->sc_map_lock);
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}
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static void svc_rdma_destroy_maps(struct svcxprt_rdma *xprt)
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{
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while (!list_empty(&xprt->sc_maps)) {
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struct svc_rdma_req_map *map;
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map = list_first_entry(&xprt->sc_maps,
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struct svc_rdma_req_map, free);
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list_del(&map->free);
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kfree(map);
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}
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}
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/* QP event handler */
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static void qp_event_handler(struct ib_event *event, void *context)
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{
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struct svc_xprt *xprt = context;
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switch (event->event) {
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/* These are considered benign events */
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case IB_EVENT_PATH_MIG:
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case IB_EVENT_COMM_EST:
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case IB_EVENT_SQ_DRAINED:
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case IB_EVENT_QP_LAST_WQE_REACHED:
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dprintk("svcrdma: QP event %s (%d) received for QP=%p\n",
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ib_event_msg(event->event), event->event,
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event->element.qp);
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break;
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/* These are considered fatal events */
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case IB_EVENT_PATH_MIG_ERR:
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case IB_EVENT_QP_FATAL:
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case IB_EVENT_QP_REQ_ERR:
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case IB_EVENT_QP_ACCESS_ERR:
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case IB_EVENT_DEVICE_FATAL:
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default:
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dprintk("svcrdma: QP ERROR event %s (%d) received for QP=%p, "
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"closing transport\n",
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ib_event_msg(event->event), event->event,
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event->element.qp);
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set_bit(XPT_CLOSE, &xprt->xpt_flags);
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break;
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}
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}
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/**
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* svc_rdma_wc_receive - Invoked by RDMA provider for each polled Receive WC
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* @cq: completion queue
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* @wc: completed WR
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*
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*/
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static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
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{
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struct svcxprt_rdma *xprt = cq->cq_context;
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struct ib_cqe *cqe = wc->wr_cqe;
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struct svc_rdma_op_ctxt *ctxt;
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/* WARNING: Only wc->wr_cqe and wc->status are reliable */
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ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
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svc_rdma_unmap_dma(ctxt);
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if (wc->status != IB_WC_SUCCESS)
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goto flushed;
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/* All wc fields are now known to be valid */
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ctxt->byte_len = wc->byte_len;
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spin_lock(&xprt->sc_rq_dto_lock);
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list_add_tail(&ctxt->list, &xprt->sc_rq_dto_q);
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spin_unlock(&xprt->sc_rq_dto_lock);
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set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
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if (test_bit(RDMAXPRT_CONN_PENDING, &xprt->sc_flags))
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goto out;
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svc_xprt_enqueue(&xprt->sc_xprt);
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goto out;
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flushed:
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if (wc->status != IB_WC_WR_FLUSH_ERR)
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pr_warn("svcrdma: receive: %s (%u/0x%x)\n",
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ib_wc_status_msg(wc->status),
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wc->status, wc->vendor_err);
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set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
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svc_rdma_put_context(ctxt, 1);
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out:
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svc_xprt_put(&xprt->sc_xprt);
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}
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static void svc_rdma_send_wc_common(struct svcxprt_rdma *xprt,
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struct ib_wc *wc,
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const char *opname)
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{
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if (wc->status != IB_WC_SUCCESS)
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goto err;
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out:
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atomic_inc(&xprt->sc_sq_avail);
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wake_up(&xprt->sc_send_wait);
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return;
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err:
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set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
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if (wc->status != IB_WC_WR_FLUSH_ERR)
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pr_err("svcrdma: %s: %s (%u/0x%x)\n",
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opname, ib_wc_status_msg(wc->status),
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wc->status, wc->vendor_err);
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goto out;
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}
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static void svc_rdma_send_wc_common_put(struct ib_cq *cq, struct ib_wc *wc,
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const char *opname)
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{
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struct svcxprt_rdma *xprt = cq->cq_context;
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svc_rdma_send_wc_common(xprt, wc, opname);
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svc_xprt_put(&xprt->sc_xprt);
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}
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/**
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* svc_rdma_wc_send - Invoked by RDMA provider for each polled Send WC
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* @cq: completion queue
|
|
* @wc: completed WR
|
|
*
|
|
*/
|
|
void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
struct ib_cqe *cqe = wc->wr_cqe;
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
|
|
svc_rdma_send_wc_common_put(cq, wc, "send");
|
|
|
|
ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
|
|
svc_rdma_unmap_dma(ctxt);
|
|
svc_rdma_put_context(ctxt, 1);
|
|
}
|
|
|
|
/**
|
|
* svc_rdma_wc_write - Invoked by RDMA provider for each polled Write WC
|
|
* @cq: completion queue
|
|
* @wc: completed WR
|
|
*
|
|
*/
|
|
void svc_rdma_wc_write(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
struct ib_cqe *cqe = wc->wr_cqe;
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
|
|
svc_rdma_send_wc_common_put(cq, wc, "write");
|
|
|
|
ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
|
|
svc_rdma_unmap_dma(ctxt);
|
|
svc_rdma_put_context(ctxt, 0);
|
|
}
|
|
|
|
/**
|
|
* svc_rdma_wc_reg - Invoked by RDMA provider for each polled FASTREG WC
|
|
* @cq: completion queue
|
|
* @wc: completed WR
|
|
*
|
|
*/
|
|
void svc_rdma_wc_reg(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
svc_rdma_send_wc_common_put(cq, wc, "fastreg");
|
|
}
|
|
|
|
/**
|
|
* svc_rdma_wc_read - Invoked by RDMA provider for each polled Read WC
|
|
* @cq: completion queue
|
|
* @wc: completed WR
|
|
*
|
|
*/
|
|
void svc_rdma_wc_read(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
struct svcxprt_rdma *xprt = cq->cq_context;
|
|
struct ib_cqe *cqe = wc->wr_cqe;
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
|
|
svc_rdma_send_wc_common(xprt, wc, "read");
|
|
|
|
ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
|
|
svc_rdma_unmap_dma(ctxt);
|
|
svc_rdma_put_frmr(xprt, ctxt->frmr);
|
|
|
|
if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) {
|
|
struct svc_rdma_op_ctxt *read_hdr;
|
|
|
|
read_hdr = ctxt->read_hdr;
|
|
spin_lock(&xprt->sc_rq_dto_lock);
|
|
list_add_tail(&read_hdr->list,
|
|
&xprt->sc_read_complete_q);
|
|
spin_unlock(&xprt->sc_rq_dto_lock);
|
|
|
|
set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
|
|
svc_xprt_enqueue(&xprt->sc_xprt);
|
|
}
|
|
|
|
svc_rdma_put_context(ctxt, 0);
|
|
svc_xprt_put(&xprt->sc_xprt);
|
|
}
|
|
|
|
/**
|
|
* svc_rdma_wc_inv - Invoked by RDMA provider for each polled LOCAL_INV WC
|
|
* @cq: completion queue
|
|
* @wc: completed WR
|
|
*
|
|
*/
|
|
void svc_rdma_wc_inv(struct ib_cq *cq, struct ib_wc *wc)
|
|
{
|
|
svc_rdma_send_wc_common_put(cq, wc, "localInv");
|
|
}
|
|
|
|
static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
|
|
int listener)
|
|
{
|
|
struct svcxprt_rdma *cma_xprt = kzalloc(sizeof *cma_xprt, GFP_KERNEL);
|
|
|
|
if (!cma_xprt)
|
|
return NULL;
|
|
svc_xprt_init(&init_net, &svc_rdma_class, &cma_xprt->sc_xprt, serv);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_accept_q);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_frmr_q);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_ctxts);
|
|
INIT_LIST_HEAD(&cma_xprt->sc_maps);
|
|
init_waitqueue_head(&cma_xprt->sc_send_wait);
|
|
|
|
spin_lock_init(&cma_xprt->sc_lock);
|
|
spin_lock_init(&cma_xprt->sc_rq_dto_lock);
|
|
spin_lock_init(&cma_xprt->sc_frmr_q_lock);
|
|
spin_lock_init(&cma_xprt->sc_ctxt_lock);
|
|
spin_lock_init(&cma_xprt->sc_map_lock);
|
|
|
|
/*
|
|
* Note that this implies that the underlying transport support
|
|
* has some form of congestion control (see RFC 7530 section 3.1
|
|
* paragraph 2). For now, we assume that all supported RDMA
|
|
* transports are suitable here.
|
|
*/
|
|
set_bit(XPT_CONG_CTRL, &cma_xprt->sc_xprt.xpt_flags);
|
|
|
|
if (listener)
|
|
set_bit(XPT_LISTENER, &cma_xprt->sc_xprt.xpt_flags);
|
|
|
|
return cma_xprt;
|
|
}
|
|
|
|
int svc_rdma_post_recv(struct svcxprt_rdma *xprt, gfp_t flags)
|
|
{
|
|
struct ib_recv_wr recv_wr, *bad_recv_wr;
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
struct page *page;
|
|
dma_addr_t pa;
|
|
int sge_no;
|
|
int buflen;
|
|
int ret;
|
|
|
|
ctxt = svc_rdma_get_context(xprt);
|
|
buflen = 0;
|
|
ctxt->direction = DMA_FROM_DEVICE;
|
|
ctxt->cqe.done = svc_rdma_wc_receive;
|
|
for (sge_no = 0; buflen < xprt->sc_max_req_size; sge_no++) {
|
|
if (sge_no >= xprt->sc_max_sge) {
|
|
pr_err("svcrdma: Too many sges (%d)\n", sge_no);
|
|
goto err_put_ctxt;
|
|
}
|
|
page = alloc_page(flags);
|
|
if (!page)
|
|
goto err_put_ctxt;
|
|
ctxt->pages[sge_no] = page;
|
|
pa = ib_dma_map_page(xprt->sc_cm_id->device,
|
|
page, 0, PAGE_SIZE,
|
|
DMA_FROM_DEVICE);
|
|
if (ib_dma_mapping_error(xprt->sc_cm_id->device, pa))
|
|
goto err_put_ctxt;
|
|
svc_rdma_count_mappings(xprt, ctxt);
|
|
ctxt->sge[sge_no].addr = pa;
|
|
ctxt->sge[sge_no].length = PAGE_SIZE;
|
|
ctxt->sge[sge_no].lkey = xprt->sc_pd->local_dma_lkey;
|
|
ctxt->count = sge_no + 1;
|
|
buflen += PAGE_SIZE;
|
|
}
|
|
recv_wr.next = NULL;
|
|
recv_wr.sg_list = &ctxt->sge[0];
|
|
recv_wr.num_sge = ctxt->count;
|
|
recv_wr.wr_cqe = &ctxt->cqe;
|
|
|
|
svc_xprt_get(&xprt->sc_xprt);
|
|
ret = ib_post_recv(xprt->sc_qp, &recv_wr, &bad_recv_wr);
|
|
if (ret) {
|
|
svc_rdma_unmap_dma(ctxt);
|
|
svc_rdma_put_context(ctxt, 1);
|
|
svc_xprt_put(&xprt->sc_xprt);
|
|
}
|
|
return ret;
|
|
|
|
err_put_ctxt:
|
|
svc_rdma_unmap_dma(ctxt);
|
|
svc_rdma_put_context(ctxt, 1);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int svc_rdma_repost_recv(struct svcxprt_rdma *xprt, gfp_t flags)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = svc_rdma_post_recv(xprt, flags);
|
|
if (ret) {
|
|
pr_err("svcrdma: could not post a receive buffer, err=%d.\n",
|
|
ret);
|
|
pr_err("svcrdma: closing transport %p.\n", xprt);
|
|
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
|
|
ret = -ENOTCONN;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
svc_rdma_parse_connect_private(struct svcxprt_rdma *newxprt,
|
|
struct rdma_conn_param *param)
|
|
{
|
|
const struct rpcrdma_connect_private *pmsg = param->private_data;
|
|
|
|
if (pmsg &&
|
|
pmsg->cp_magic == rpcrdma_cmp_magic &&
|
|
pmsg->cp_version == RPCRDMA_CMP_VERSION) {
|
|
newxprt->sc_snd_w_inv = pmsg->cp_flags &
|
|
RPCRDMA_CMP_F_SND_W_INV_OK;
|
|
|
|
dprintk("svcrdma: client send_size %u, recv_size %u "
|
|
"remote inv %ssupported\n",
|
|
rpcrdma_decode_buffer_size(pmsg->cp_send_size),
|
|
rpcrdma_decode_buffer_size(pmsg->cp_recv_size),
|
|
newxprt->sc_snd_w_inv ? "" : "un");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function handles the CONNECT_REQUEST event on a listening
|
|
* endpoint. It is passed the cma_id for the _new_ connection. The context in
|
|
* this cma_id is inherited from the listening cma_id and is the svc_xprt
|
|
* structure for the listening endpoint.
|
|
*
|
|
* This function creates a new xprt for the new connection and enqueues it on
|
|
* the accept queue for the listent xprt. When the listen thread is kicked, it
|
|
* will call the recvfrom method on the listen xprt which will accept the new
|
|
* connection.
|
|
*/
|
|
static void handle_connect_req(struct rdma_cm_id *new_cma_id,
|
|
struct rdma_conn_param *param)
|
|
{
|
|
struct svcxprt_rdma *listen_xprt = new_cma_id->context;
|
|
struct svcxprt_rdma *newxprt;
|
|
struct sockaddr *sa;
|
|
|
|
/* Create a new transport */
|
|
newxprt = rdma_create_xprt(listen_xprt->sc_xprt.xpt_server, 0);
|
|
if (!newxprt) {
|
|
dprintk("svcrdma: failed to create new transport\n");
|
|
return;
|
|
}
|
|
newxprt->sc_cm_id = new_cma_id;
|
|
new_cma_id->context = newxprt;
|
|
dprintk("svcrdma: Creating newxprt=%p, cm_id=%p, listenxprt=%p\n",
|
|
newxprt, newxprt->sc_cm_id, listen_xprt);
|
|
svc_rdma_parse_connect_private(newxprt, param);
|
|
|
|
/* Save client advertised inbound read limit for use later in accept. */
|
|
newxprt->sc_ord = param->initiator_depth;
|
|
|
|
/* Set the local and remote addresses in the transport */
|
|
sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr;
|
|
svc_xprt_set_remote(&newxprt->sc_xprt, sa, svc_addr_len(sa));
|
|
sa = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr;
|
|
svc_xprt_set_local(&newxprt->sc_xprt, sa, svc_addr_len(sa));
|
|
|
|
/*
|
|
* Enqueue the new transport on the accept queue of the listening
|
|
* transport
|
|
*/
|
|
spin_lock_bh(&listen_xprt->sc_lock);
|
|
list_add_tail(&newxprt->sc_accept_q, &listen_xprt->sc_accept_q);
|
|
spin_unlock_bh(&listen_xprt->sc_lock);
|
|
|
|
set_bit(XPT_CONN, &listen_xprt->sc_xprt.xpt_flags);
|
|
svc_xprt_enqueue(&listen_xprt->sc_xprt);
|
|
}
|
|
|
|
/*
|
|
* Handles events generated on the listening endpoint. These events will be
|
|
* either be incoming connect requests or adapter removal events.
|
|
*/
|
|
static int rdma_listen_handler(struct rdma_cm_id *cma_id,
|
|
struct rdma_cm_event *event)
|
|
{
|
|
struct svcxprt_rdma *xprt = cma_id->context;
|
|
int ret = 0;
|
|
|
|
switch (event->event) {
|
|
case RDMA_CM_EVENT_CONNECT_REQUEST:
|
|
dprintk("svcrdma: Connect request on cma_id=%p, xprt = %p, "
|
|
"event = %s (%d)\n", cma_id, cma_id->context,
|
|
rdma_event_msg(event->event), event->event);
|
|
handle_connect_req(cma_id, &event->param.conn);
|
|
break;
|
|
|
|
case RDMA_CM_EVENT_ESTABLISHED:
|
|
/* Accept complete */
|
|
dprintk("svcrdma: Connection completed on LISTEN xprt=%p, "
|
|
"cm_id=%p\n", xprt, cma_id);
|
|
break;
|
|
|
|
case RDMA_CM_EVENT_DEVICE_REMOVAL:
|
|
dprintk("svcrdma: Device removal xprt=%p, cm_id=%p\n",
|
|
xprt, cma_id);
|
|
if (xprt)
|
|
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
|
|
break;
|
|
|
|
default:
|
|
dprintk("svcrdma: Unexpected event on listening endpoint %p, "
|
|
"event = %s (%d)\n", cma_id,
|
|
rdma_event_msg(event->event), event->event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rdma_cma_handler(struct rdma_cm_id *cma_id,
|
|
struct rdma_cm_event *event)
|
|
{
|
|
struct svc_xprt *xprt = cma_id->context;
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
switch (event->event) {
|
|
case RDMA_CM_EVENT_ESTABLISHED:
|
|
/* Accept complete */
|
|
svc_xprt_get(xprt);
|
|
dprintk("svcrdma: Connection completed on DTO xprt=%p, "
|
|
"cm_id=%p\n", xprt, cma_id);
|
|
clear_bit(RDMAXPRT_CONN_PENDING, &rdma->sc_flags);
|
|
svc_xprt_enqueue(xprt);
|
|
break;
|
|
case RDMA_CM_EVENT_DISCONNECTED:
|
|
dprintk("svcrdma: Disconnect on DTO xprt=%p, cm_id=%p\n",
|
|
xprt, cma_id);
|
|
if (xprt) {
|
|
set_bit(XPT_CLOSE, &xprt->xpt_flags);
|
|
svc_xprt_enqueue(xprt);
|
|
svc_xprt_put(xprt);
|
|
}
|
|
break;
|
|
case RDMA_CM_EVENT_DEVICE_REMOVAL:
|
|
dprintk("svcrdma: Device removal cma_id=%p, xprt = %p, "
|
|
"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 = %s (%d)\n", cma_id,
|
|
rdma_event_msg(event->event), event->event);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a listening RDMA service endpoint.
|
|
*/
|
|
static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
|
|
struct net *net,
|
|
struct sockaddr *sa, int salen,
|
|
int flags)
|
|
{
|
|
struct rdma_cm_id *listen_id;
|
|
struct svcxprt_rdma *cma_xprt;
|
|
int ret;
|
|
|
|
dprintk("svcrdma: Creating RDMA socket\n");
|
|
if ((sa->sa_family != AF_INET) && (sa->sa_family != AF_INET6)) {
|
|
dprintk("svcrdma: Address family %d is not supported.\n", sa->sa_family);
|
|
return ERR_PTR(-EAFNOSUPPORT);
|
|
}
|
|
cma_xprt = rdma_create_xprt(serv, 1);
|
|
if (!cma_xprt)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
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);
|
|
goto err0;
|
|
}
|
|
|
|
/* Allow both IPv4 and IPv6 sockets to bind a single port
|
|
* at the same time.
|
|
*/
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
ret = rdma_set_afonly(listen_id, 1);
|
|
if (ret) {
|
|
dprintk("svcrdma: rdma_set_afonly failed = %d\n", ret);
|
|
goto err1;
|
|
}
|
|
#endif
|
|
ret = rdma_bind_addr(listen_id, sa);
|
|
if (ret) {
|
|
dprintk("svcrdma: rdma_bind_addr failed = %d\n", ret);
|
|
goto err1;
|
|
}
|
|
cma_xprt->sc_cm_id = listen_id;
|
|
|
|
ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG);
|
|
if (ret) {
|
|
dprintk("svcrdma: rdma_listen failed = %d\n", ret);
|
|
goto err1;
|
|
}
|
|
|
|
/*
|
|
* We need to use the address from the cm_id in case the
|
|
* caller specified 0 for the port number.
|
|
*/
|
|
sa = (struct sockaddr *)&cma_xprt->sc_cm_id->route.addr.src_addr;
|
|
svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen);
|
|
|
|
return &cma_xprt->sc_xprt;
|
|
|
|
err1:
|
|
rdma_destroy_id(listen_id);
|
|
err0:
|
|
kfree(cma_xprt);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct svc_rdma_fastreg_mr *rdma_alloc_frmr(struct svcxprt_rdma *xprt)
|
|
{
|
|
struct ib_mr *mr;
|
|
struct scatterlist *sg;
|
|
struct svc_rdma_fastreg_mr *frmr;
|
|
u32 num_sg;
|
|
|
|
frmr = kmalloc(sizeof(*frmr), GFP_KERNEL);
|
|
if (!frmr)
|
|
goto err;
|
|
|
|
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;
|
|
|
|
sg = kcalloc(RPCSVC_MAXPAGES, sizeof(*sg), GFP_KERNEL);
|
|
if (!sg)
|
|
goto err_free_mr;
|
|
|
|
sg_init_table(sg, RPCSVC_MAXPAGES);
|
|
|
|
frmr->mr = mr;
|
|
frmr->sg = sg;
|
|
INIT_LIST_HEAD(&frmr->frmr_list);
|
|
return frmr;
|
|
|
|
err_free_mr:
|
|
ib_dereg_mr(mr);
|
|
err_free_frmr:
|
|
kfree(frmr);
|
|
err:
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
static void rdma_dealloc_frmr_q(struct svcxprt_rdma *xprt)
|
|
{
|
|
struct svc_rdma_fastreg_mr *frmr;
|
|
|
|
while (!list_empty(&xprt->sc_frmr_q)) {
|
|
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);
|
|
kfree(frmr);
|
|
}
|
|
}
|
|
|
|
struct svc_rdma_fastreg_mr *svc_rdma_get_frmr(struct svcxprt_rdma *rdma)
|
|
{
|
|
struct svc_rdma_fastreg_mr *frmr = NULL;
|
|
|
|
spin_lock(&rdma->sc_frmr_q_lock);
|
|
if (!list_empty(&rdma->sc_frmr_q)) {
|
|
frmr = list_entry(rdma->sc_frmr_q.next,
|
|
struct svc_rdma_fastreg_mr, frmr_list);
|
|
list_del_init(&frmr->frmr_list);
|
|
frmr->sg_nents = 0;
|
|
}
|
|
spin_unlock(&rdma->sc_frmr_q_lock);
|
|
if (frmr)
|
|
return frmr;
|
|
|
|
return rdma_alloc_frmr(rdma);
|
|
}
|
|
|
|
void svc_rdma_put_frmr(struct svcxprt_rdma *rdma,
|
|
struct svc_rdma_fastreg_mr *frmr)
|
|
{
|
|
if (frmr) {
|
|
ib_dma_unmap_sg(rdma->sc_cm_id->device,
|
|
frmr->sg, frmr->sg_nents, frmr->direction);
|
|
spin_lock(&rdma->sc_frmr_q_lock);
|
|
WARN_ON_ONCE(!list_empty(&frmr->frmr_list));
|
|
list_add(&frmr->frmr_list, &rdma->sc_frmr_q);
|
|
spin_unlock(&rdma->sc_frmr_q_lock);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the xpo_recvfrom function for listening endpoints. Its
|
|
* purpose is to accept incoming connections. The CMA callback handler
|
|
* has already created a new transport and attached it to the new CMA
|
|
* ID.
|
|
*
|
|
* There is a queue of pending connections hung on the listening
|
|
* transport. This queue contains the new svc_xprt structure. This
|
|
* function takes svc_xprt structures off the accept_q and completes
|
|
* the connection.
|
|
*/
|
|
static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *listen_rdma;
|
|
struct svcxprt_rdma *newxprt = NULL;
|
|
struct rdma_conn_param conn_param;
|
|
struct rpcrdma_connect_private pmsg;
|
|
struct ib_qp_init_attr qp_attr;
|
|
struct ib_device *dev;
|
|
struct sockaddr *sap;
|
|
unsigned int i;
|
|
int ret = 0;
|
|
|
|
listen_rdma = container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
clear_bit(XPT_CONN, &xprt->xpt_flags);
|
|
/* Get the next entry off the accept list */
|
|
spin_lock_bh(&listen_rdma->sc_lock);
|
|
if (!list_empty(&listen_rdma->sc_accept_q)) {
|
|
newxprt = list_entry(listen_rdma->sc_accept_q.next,
|
|
struct svcxprt_rdma, sc_accept_q);
|
|
list_del_init(&newxprt->sc_accept_q);
|
|
}
|
|
if (!list_empty(&listen_rdma->sc_accept_q))
|
|
set_bit(XPT_CONN, &listen_rdma->sc_xprt.xpt_flags);
|
|
spin_unlock_bh(&listen_rdma->sc_lock);
|
|
if (!newxprt)
|
|
return NULL;
|
|
|
|
dprintk("svcrdma: newxprt from accept queue = %p, cm_id=%p\n",
|
|
newxprt, newxprt->sc_cm_id);
|
|
|
|
dev = newxprt->sc_cm_id->device;
|
|
|
|
/* Qualify the transport resource defaults with the
|
|
* capabilities of this particular device */
|
|
newxprt->sc_max_sge = min((size_t)dev->attrs.max_sge,
|
|
(size_t)RPCSVC_MAXPAGES);
|
|
newxprt->sc_max_sge_rd = min_t(size_t, dev->attrs.max_sge_rd,
|
|
RPCSVC_MAXPAGES);
|
|
newxprt->sc_max_req_size = svcrdma_max_req_size;
|
|
newxprt->sc_max_requests = min_t(u32, dev->attrs.max_qp_wr,
|
|
svcrdma_max_requests);
|
|
newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests);
|
|
newxprt->sc_max_bc_requests = min_t(u32, dev->attrs.max_qp_wr,
|
|
svcrdma_max_bc_requests);
|
|
newxprt->sc_rq_depth = newxprt->sc_max_requests +
|
|
newxprt->sc_max_bc_requests;
|
|
newxprt->sc_sq_depth = RPCRDMA_SQ_DEPTH_MULT * newxprt->sc_rq_depth;
|
|
atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth);
|
|
|
|
if (!svc_rdma_prealloc_ctxts(newxprt))
|
|
goto errout;
|
|
if (!svc_rdma_prealloc_maps(newxprt))
|
|
goto errout;
|
|
|
|
/*
|
|
* Limit ORD based on client limit, local device limit, and
|
|
* configured svcrdma limit.
|
|
*/
|
|
newxprt->sc_ord = min_t(size_t, dev->attrs.max_qp_rd_atom, newxprt->sc_ord);
|
|
newxprt->sc_ord = min_t(size_t, svcrdma_ord, newxprt->sc_ord);
|
|
|
|
newxprt->sc_pd = ib_alloc_pd(dev, 0);
|
|
if (IS_ERR(newxprt->sc_pd)) {
|
|
dprintk("svcrdma: error creating PD for connect request\n");
|
|
goto errout;
|
|
}
|
|
newxprt->sc_sq_cq = ib_alloc_cq(dev, newxprt, newxprt->sc_sq_depth,
|
|
0, IB_POLL_WORKQUEUE);
|
|
if (IS_ERR(newxprt->sc_sq_cq)) {
|
|
dprintk("svcrdma: error creating SQ CQ for connect request\n");
|
|
goto errout;
|
|
}
|
|
newxprt->sc_rq_cq = ib_alloc_cq(dev, newxprt, newxprt->sc_rq_depth,
|
|
0, IB_POLL_WORKQUEUE);
|
|
if (IS_ERR(newxprt->sc_rq_cq)) {
|
|
dprintk("svcrdma: error creating RQ CQ for connect request\n");
|
|
goto errout;
|
|
}
|
|
|
|
memset(&qp_attr, 0, sizeof qp_attr);
|
|
qp_attr.event_handler = qp_event_handler;
|
|
qp_attr.qp_context = &newxprt->sc_xprt;
|
|
qp_attr.cap.max_send_wr = newxprt->sc_sq_depth;
|
|
qp_attr.cap.max_recv_wr = newxprt->sc_rq_depth;
|
|
qp_attr.cap.max_send_sge = newxprt->sc_max_sge;
|
|
qp_attr.cap.max_recv_sge = newxprt->sc_max_sge;
|
|
qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
|
|
qp_attr.qp_type = IB_QPT_RC;
|
|
qp_attr.send_cq = newxprt->sc_sq_cq;
|
|
qp_attr.recv_cq = newxprt->sc_rq_cq;
|
|
dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n",
|
|
newxprt->sc_cm_id, newxprt->sc_pd);
|
|
dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n",
|
|
qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr);
|
|
dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n",
|
|
qp_attr.cap.max_send_sge, qp_attr.cap.max_recv_sge);
|
|
|
|
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_qp = newxprt->sc_cm_id->qp;
|
|
|
|
/*
|
|
* Use the most secure set of MR resources based on the
|
|
* transport type and available memory management features in
|
|
* the device. Here's the table implemented below:
|
|
*
|
|
* Fast Global DMA Remote WR
|
|
* Reg LKEY MR Access
|
|
* Sup'd Sup'd Needed Needed
|
|
*
|
|
* IWARP N N Y Y
|
|
* N Y Y Y
|
|
* Y N Y N
|
|
* Y Y N -
|
|
*
|
|
* IB N N Y N
|
|
* N Y N -
|
|
* Y N Y N
|
|
* Y Y N -
|
|
*
|
|
* 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 (dev->attrs.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
|
|
newxprt->sc_frmr_pg_list_len =
|
|
dev->attrs.max_fast_reg_page_list_len;
|
|
newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_FAST_REG;
|
|
newxprt->sc_reader = rdma_read_chunk_frmr;
|
|
} else
|
|
newxprt->sc_snd_w_inv = false;
|
|
|
|
/*
|
|
* Determine if a DMA MR is required and if so, what privs are required
|
|
*/
|
|
if (!rdma_protocol_iwarp(dev, newxprt->sc_cm_id->port_num) &&
|
|
!rdma_ib_or_roce(dev, newxprt->sc_cm_id->port_num))
|
|
goto errout;
|
|
|
|
if (rdma_protocol_iwarp(dev, newxprt->sc_cm_id->port_num))
|
|
newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_READ_W_INV;
|
|
|
|
/* Post receive buffers */
|
|
for (i = 0; i < newxprt->sc_max_requests; i++) {
|
|
ret = svc_rdma_post_recv(newxprt, GFP_KERNEL);
|
|
if (ret) {
|
|
dprintk("svcrdma: failure posting receive buffers\n");
|
|
goto errout;
|
|
}
|
|
}
|
|
|
|
/* Swap out the handler */
|
|
newxprt->sc_cm_id->event_handler = rdma_cma_handler;
|
|
|
|
/* Construct RDMA-CM private message */
|
|
pmsg.cp_magic = rpcrdma_cmp_magic;
|
|
pmsg.cp_version = RPCRDMA_CMP_VERSION;
|
|
pmsg.cp_flags = 0;
|
|
pmsg.cp_send_size = pmsg.cp_recv_size =
|
|
rpcrdma_encode_buffer_size(newxprt->sc_max_req_size);
|
|
|
|
/* Accept Connection */
|
|
set_bit(RDMAXPRT_CONN_PENDING, &newxprt->sc_flags);
|
|
memset(&conn_param, 0, sizeof conn_param);
|
|
conn_param.responder_resources = 0;
|
|
conn_param.initiator_depth = newxprt->sc_ord;
|
|
conn_param.private_data = &pmsg;
|
|
conn_param.private_data_len = sizeof(pmsg);
|
|
ret = rdma_accept(newxprt->sc_cm_id, &conn_param);
|
|
if (ret) {
|
|
dprintk("svcrdma: failed to accept new connection, ret=%d\n",
|
|
ret);
|
|
goto errout;
|
|
}
|
|
|
|
dprintk("svcrdma: new connection %p accepted:\n", newxprt);
|
|
sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr;
|
|
dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap));
|
|
sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr;
|
|
dprintk(" remote address : %pIS:%u\n", sap, rpc_get_port(sap));
|
|
dprintk(" max_sge : %d\n", newxprt->sc_max_sge);
|
|
dprintk(" max_sge_rd : %d\n", newxprt->sc_max_sge_rd);
|
|
dprintk(" sq_depth : %d\n", newxprt->sc_sq_depth);
|
|
dprintk(" max_requests : %d\n", newxprt->sc_max_requests);
|
|
dprintk(" ord : %d\n", newxprt->sc_ord);
|
|
|
|
return &newxprt->sc_xprt;
|
|
|
|
errout:
|
|
dprintk("svcrdma: failure accepting new connection rc=%d.\n", ret);
|
|
/* Take a reference in case the DTO handler runs */
|
|
svc_xprt_get(&newxprt->sc_xprt);
|
|
if (newxprt->sc_qp && !IS_ERR(newxprt->sc_qp))
|
|
ib_destroy_qp(newxprt->sc_qp);
|
|
rdma_destroy_id(newxprt->sc_cm_id);
|
|
/* This call to put will destroy the transport */
|
|
svc_xprt_put(&newxprt->sc_xprt);
|
|
return NULL;
|
|
}
|
|
|
|
static void svc_rdma_release_rqst(struct svc_rqst *rqstp)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* When connected, an svc_xprt has at least two references:
|
|
*
|
|
* - A reference held by the cm_id between the ESTABLISHED and
|
|
* DISCONNECTED events. If the remote peer disconnected first, this
|
|
* reference could be gone.
|
|
*
|
|
* - A reference held by the svc_recv code that called this function
|
|
* as part of close processing.
|
|
*
|
|
* At a minimum one references should still be held.
|
|
*/
|
|
static void svc_rdma_detach(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
dprintk("svc: svc_rdma_detach(%p)\n", xprt);
|
|
|
|
/* Disconnect and flush posted WQE */
|
|
rdma_disconnect(rdma->sc_cm_id);
|
|
}
|
|
|
|
static void __svc_rdma_free(struct work_struct *work)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(work, struct svcxprt_rdma, sc_work);
|
|
struct svc_xprt *xprt = &rdma->sc_xprt;
|
|
|
|
dprintk("svcrdma: %s(%p)\n", __func__, rdma);
|
|
|
|
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
|
|
ib_drain_qp(rdma->sc_qp);
|
|
|
|
/* We should only be called from kref_put */
|
|
if (kref_read(&xprt->xpt_ref) != 0)
|
|
pr_err("svcrdma: sc_xprt still in use? (%d)\n",
|
|
kref_read(&xprt->xpt_ref));
|
|
|
|
/*
|
|
* Destroy queued, but not processed read completions. Note
|
|
* that this cleanup has to be done before destroying the
|
|
* cm_id because the device ptr is needed to unmap the dma in
|
|
* svc_rdma_put_context.
|
|
*/
|
|
while (!list_empty(&rdma->sc_read_complete_q)) {
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
ctxt = list_first_entry(&rdma->sc_read_complete_q,
|
|
struct svc_rdma_op_ctxt, list);
|
|
list_del(&ctxt->list);
|
|
svc_rdma_put_context(ctxt, 1);
|
|
}
|
|
|
|
/* Destroy queued, but not processed recv completions */
|
|
while (!list_empty(&rdma->sc_rq_dto_q)) {
|
|
struct svc_rdma_op_ctxt *ctxt;
|
|
ctxt = list_first_entry(&rdma->sc_rq_dto_q,
|
|
struct svc_rdma_op_ctxt, list);
|
|
list_del(&ctxt->list);
|
|
svc_rdma_put_context(ctxt, 1);
|
|
}
|
|
|
|
/* Warn if we leaked a resource or under-referenced */
|
|
if (rdma->sc_ctxt_used != 0)
|
|
pr_err("svcrdma: ctxt still in use? (%d)\n",
|
|
rdma->sc_ctxt_used);
|
|
|
|
/* Final put of backchannel client transport */
|
|
if (xprt->xpt_bc_xprt) {
|
|
xprt_put(xprt->xpt_bc_xprt);
|
|
xprt->xpt_bc_xprt = NULL;
|
|
}
|
|
|
|
rdma_dealloc_frmr_q(rdma);
|
|
svc_rdma_destroy_ctxts(rdma);
|
|
svc_rdma_destroy_maps(rdma);
|
|
|
|
/* Destroy the QP if present (not a listener) */
|
|
if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))
|
|
ib_destroy_qp(rdma->sc_qp);
|
|
|
|
if (rdma->sc_sq_cq && !IS_ERR(rdma->sc_sq_cq))
|
|
ib_free_cq(rdma->sc_sq_cq);
|
|
|
|
if (rdma->sc_rq_cq && !IS_ERR(rdma->sc_rq_cq))
|
|
ib_free_cq(rdma->sc_rq_cq);
|
|
|
|
if (rdma->sc_pd && !IS_ERR(rdma->sc_pd))
|
|
ib_dealloc_pd(rdma->sc_pd);
|
|
|
|
/* Destroy the CM ID */
|
|
rdma_destroy_id(rdma->sc_cm_id);
|
|
|
|
kfree(rdma);
|
|
}
|
|
|
|
static void svc_rdma_free(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
INIT_WORK(&rdma->sc_work, __svc_rdma_free);
|
|
queue_work(svc_rdma_wq, &rdma->sc_work);
|
|
}
|
|
|
|
static int svc_rdma_has_wspace(struct svc_xprt *xprt)
|
|
{
|
|
struct svcxprt_rdma *rdma =
|
|
container_of(xprt, struct svcxprt_rdma, sc_xprt);
|
|
|
|
/*
|
|
* If there are already waiters on the SQ,
|
|
* return false.
|
|
*/
|
|
if (waitqueue_active(&rdma->sc_send_wait))
|
|
return 0;
|
|
|
|
/* Otherwise return true. */
|
|
return 1;
|
|
}
|
|
|
|
static int svc_rdma_secure_port(struct svc_rqst *rqstp)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void svc_rdma_kill_temp_xprt(struct svc_xprt *xprt)
|
|
{
|
|
}
|
|
|
|
int svc_rdma_send(struct svcxprt_rdma *xprt, struct ib_send_wr *wr)
|
|
{
|
|
struct ib_send_wr *bad_wr, *n_wr;
|
|
int wr_count;
|
|
int i;
|
|
int ret;
|
|
|
|
if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags))
|
|
return -ENOTCONN;
|
|
|
|
wr_count = 1;
|
|
for (n_wr = wr->next; n_wr; n_wr = n_wr->next)
|
|
wr_count++;
|
|
|
|
/* If the SQ is full, wait until an SQ entry is available */
|
|
while (1) {
|
|
if ((atomic_sub_return(wr_count, &xprt->sc_sq_avail) < 0)) {
|
|
atomic_inc(&rdma_stat_sq_starve);
|
|
|
|
/* Wait until SQ WR available if SQ still full */
|
|
atomic_add(wr_count, &xprt->sc_sq_avail);
|
|
wait_event(xprt->sc_send_wait,
|
|
atomic_read(&xprt->sc_sq_avail) > wr_count);
|
|
if (test_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags))
|
|
return -ENOTCONN;
|
|
continue;
|
|
}
|
|
/* Take a transport ref for each WR posted */
|
|
for (i = 0; i < wr_count; i++)
|
|
svc_xprt_get(&xprt->sc_xprt);
|
|
|
|
/* Bump used SQ WR count and post */
|
|
ret = ib_post_send(xprt->sc_qp, wr, &bad_wr);
|
|
if (ret) {
|
|
set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
|
|
for (i = 0; i < wr_count; i ++)
|
|
svc_xprt_put(&xprt->sc_xprt);
|
|
dprintk("svcrdma: failed to post SQ WR rc=%d\n", ret);
|
|
dprintk(" sc_sq_avail=%d, sc_sq_depth=%d\n",
|
|
atomic_read(&xprt->sc_sq_avail),
|
|
xprt->sc_sq_depth);
|
|
wake_up(&xprt->sc_send_wait);
|
|
}
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|