d0bbe0dd35
Pull trivial tree from Jiri Kosina: "Usual trivial tree updates. Nothing outstanding -- mostly printk() and comment fixes and unused identifier removals" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: goldfish: goldfish_tty_probe() is not using 'i' any more powerpc: Fix comment in smu.h qla2xxx: Fix printks in ql_log message lib: correct link to the original source for div64_u64 si2168, tda10071, m88ds3103: Fix firmware wording usb: storage: Fix printk in isd200_log_config() qla2xxx: Fix printk in qla25xx_setup_mode init/main: fix reset_device comment ipwireless: missing assignment goldfish: remove unreachable line of code coredump: Fix do_coredump() comment stacktrace.h: remove duplicate declaration task_struct smpboot.h: Remove unused function prototype treewide: Fix typo in printk messages treewide: Fix typo in printk messages mod_devicetable: fix comment for match_flags
1673 lines
42 KiB
C
1673 lines
42 KiB
C
/*
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* Copyright (c) 2003-2007 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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/*
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* verbs.c
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*
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* Encapsulates the major functions managing:
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* o adapters
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* o endpoints
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* o connections
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* o buffer memory
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*/
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/prefetch.h>
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#include <linux/sunrpc/addr.h>
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#include <asm/bitops.h>
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#include "xprt_rdma.h"
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/*
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* Globals/Macros
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*/
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#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
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# define RPCDBG_FACILITY RPCDBG_TRANS
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#endif
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/*
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* internal functions
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*/
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/*
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* handle replies in tasklet context, using a single, global list
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* rdma tasklet function -- just turn around and call the func
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* for all replies on the list
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*/
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static DEFINE_SPINLOCK(rpcrdma_tk_lock_g);
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static LIST_HEAD(rpcrdma_tasklets_g);
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static void
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rpcrdma_run_tasklet(unsigned long data)
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{
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struct rpcrdma_rep *rep;
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void (*func)(struct rpcrdma_rep *);
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unsigned long flags;
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data = data;
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spin_lock_irqsave(&rpcrdma_tk_lock_g, flags);
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while (!list_empty(&rpcrdma_tasklets_g)) {
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rep = list_entry(rpcrdma_tasklets_g.next,
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struct rpcrdma_rep, rr_list);
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list_del(&rep->rr_list);
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func = rep->rr_func;
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rep->rr_func = NULL;
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spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags);
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if (func)
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func(rep);
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else
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rpcrdma_recv_buffer_put(rep);
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spin_lock_irqsave(&rpcrdma_tk_lock_g, flags);
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}
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spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags);
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}
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static DECLARE_TASKLET(rpcrdma_tasklet_g, rpcrdma_run_tasklet, 0UL);
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static const char * const async_event[] = {
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"CQ error",
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"QP fatal error",
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"QP request error",
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"QP access error",
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"communication established",
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"send queue drained",
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"path migration successful",
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"path mig error",
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"device fatal error",
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"port active",
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"port error",
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"LID change",
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"P_key change",
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"SM change",
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"SRQ error",
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"SRQ limit reached",
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"last WQE reached",
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"client reregister",
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"GID change",
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};
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#define ASYNC_MSG(status) \
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((status) < ARRAY_SIZE(async_event) ? \
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async_event[(status)] : "unknown async error")
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static void
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rpcrdma_schedule_tasklet(struct list_head *sched_list)
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{
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unsigned long flags;
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spin_lock_irqsave(&rpcrdma_tk_lock_g, flags);
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list_splice_tail(sched_list, &rpcrdma_tasklets_g);
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spin_unlock_irqrestore(&rpcrdma_tk_lock_g, flags);
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tasklet_schedule(&rpcrdma_tasklet_g);
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}
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static void
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rpcrdma_qp_async_error_upcall(struct ib_event *event, void *context)
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{
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struct rpcrdma_ep *ep = context;
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pr_err("RPC: %s: %s on device %s ep %p\n",
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__func__, ASYNC_MSG(event->event),
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event->device->name, context);
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if (ep->rep_connected == 1) {
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ep->rep_connected = -EIO;
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rpcrdma_conn_func(ep);
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wake_up_all(&ep->rep_connect_wait);
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}
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}
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static void
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rpcrdma_cq_async_error_upcall(struct ib_event *event, void *context)
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{
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struct rpcrdma_ep *ep = context;
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pr_err("RPC: %s: %s on device %s ep %p\n",
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__func__, ASYNC_MSG(event->event),
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event->device->name, context);
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if (ep->rep_connected == 1) {
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ep->rep_connected = -EIO;
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rpcrdma_conn_func(ep);
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wake_up_all(&ep->rep_connect_wait);
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}
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}
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static const char * const wc_status[] = {
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"success",
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"local length error",
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"local QP operation error",
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"local EE context operation error",
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"local protection error",
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"WR flushed",
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"memory management operation error",
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"bad response error",
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"local access error",
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"remote invalid request error",
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"remote access error",
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"remote operation error",
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"transport retry counter exceeded",
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"RNR retry counter exceeded",
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"local RDD violation error",
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"remove invalid RD request",
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"operation aborted",
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"invalid EE context number",
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"invalid EE context state",
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"fatal error",
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"response timeout error",
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"general error",
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};
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#define COMPLETION_MSG(status) \
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((status) < ARRAY_SIZE(wc_status) ? \
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wc_status[(status)] : "unexpected completion error")
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static void
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rpcrdma_sendcq_process_wc(struct ib_wc *wc)
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{
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/* WARNING: Only wr_id and status are reliable at this point */
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if (wc->wr_id == RPCRDMA_IGNORE_COMPLETION) {
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if (wc->status != IB_WC_SUCCESS &&
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wc->status != IB_WC_WR_FLUSH_ERR)
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pr_err("RPC: %s: SEND: %s\n",
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__func__, COMPLETION_MSG(wc->status));
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} else {
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struct rpcrdma_mw *r;
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r = (struct rpcrdma_mw *)(unsigned long)wc->wr_id;
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r->mw_sendcompletion(wc);
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}
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}
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static int
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rpcrdma_sendcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep)
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{
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struct ib_wc *wcs;
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int budget, count, rc;
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budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE;
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do {
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wcs = ep->rep_send_wcs;
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rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs);
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if (rc <= 0)
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return rc;
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count = rc;
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while (count-- > 0)
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rpcrdma_sendcq_process_wc(wcs++);
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} while (rc == RPCRDMA_POLLSIZE && --budget);
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return 0;
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}
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/*
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* Handle send, fast_reg_mr, and local_inv completions.
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*
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* Send events are typically suppressed and thus do not result
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* in an upcall. Occasionally one is signaled, however. This
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* prevents the provider's completion queue from wrapping and
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* losing a completion.
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*/
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static void
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rpcrdma_sendcq_upcall(struct ib_cq *cq, void *cq_context)
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{
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struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context;
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int rc;
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rc = rpcrdma_sendcq_poll(cq, ep);
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if (rc) {
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dprintk("RPC: %s: ib_poll_cq failed: %i\n",
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__func__, rc);
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return;
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}
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rc = ib_req_notify_cq(cq,
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IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
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if (rc == 0)
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return;
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if (rc < 0) {
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dprintk("RPC: %s: ib_req_notify_cq failed: %i\n",
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__func__, rc);
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return;
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}
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rpcrdma_sendcq_poll(cq, ep);
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}
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static void
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rpcrdma_recvcq_process_wc(struct ib_wc *wc, struct list_head *sched_list)
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{
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struct rpcrdma_rep *rep =
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(struct rpcrdma_rep *)(unsigned long)wc->wr_id;
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/* WARNING: Only wr_id and status are reliable at this point */
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if (wc->status != IB_WC_SUCCESS)
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goto out_fail;
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/* status == SUCCESS means all fields in wc are trustworthy */
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if (wc->opcode != IB_WC_RECV)
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return;
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dprintk("RPC: %s: rep %p opcode 'recv', length %u: success\n",
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__func__, rep, wc->byte_len);
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rep->rr_len = wc->byte_len;
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ib_dma_sync_single_for_cpu(rdmab_to_ia(rep->rr_buffer)->ri_id->device,
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rdmab_addr(rep->rr_rdmabuf),
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rep->rr_len, DMA_FROM_DEVICE);
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prefetch(rdmab_to_msg(rep->rr_rdmabuf));
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out_schedule:
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list_add_tail(&rep->rr_list, sched_list);
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return;
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out_fail:
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if (wc->status != IB_WC_WR_FLUSH_ERR)
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pr_err("RPC: %s: rep %p: %s\n",
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__func__, rep, COMPLETION_MSG(wc->status));
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rep->rr_len = ~0U;
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goto out_schedule;
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}
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static int
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rpcrdma_recvcq_poll(struct ib_cq *cq, struct rpcrdma_ep *ep)
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{
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struct list_head sched_list;
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struct ib_wc *wcs;
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int budget, count, rc;
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INIT_LIST_HEAD(&sched_list);
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budget = RPCRDMA_WC_BUDGET / RPCRDMA_POLLSIZE;
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do {
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wcs = ep->rep_recv_wcs;
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rc = ib_poll_cq(cq, RPCRDMA_POLLSIZE, wcs);
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if (rc <= 0)
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goto out_schedule;
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count = rc;
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while (count-- > 0)
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rpcrdma_recvcq_process_wc(wcs++, &sched_list);
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} while (rc == RPCRDMA_POLLSIZE && --budget);
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rc = 0;
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out_schedule:
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rpcrdma_schedule_tasklet(&sched_list);
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return rc;
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}
|
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|
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/*
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* Handle receive completions.
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*
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* It is reentrant but processes single events in order to maintain
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* ordering of receives to keep server credits.
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*
|
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* It is the responsibility of the scheduled tasklet to return
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* recv buffers to the pool. NOTE: this affects synchronization of
|
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* connection shutdown. That is, the structures required for
|
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* the completion of the reply handler must remain intact until
|
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* all memory has been reclaimed.
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*/
|
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static void
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rpcrdma_recvcq_upcall(struct ib_cq *cq, void *cq_context)
|
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{
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struct rpcrdma_ep *ep = (struct rpcrdma_ep *)cq_context;
|
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int rc;
|
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|
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rc = rpcrdma_recvcq_poll(cq, ep);
|
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if (rc) {
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dprintk("RPC: %s: ib_poll_cq failed: %i\n",
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__func__, rc);
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return;
|
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}
|
|
|
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rc = ib_req_notify_cq(cq,
|
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IB_CQ_NEXT_COMP | IB_CQ_REPORT_MISSED_EVENTS);
|
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if (rc == 0)
|
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return;
|
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if (rc < 0) {
|
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dprintk("RPC: %s: ib_req_notify_cq failed: %i\n",
|
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__func__, rc);
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return;
|
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}
|
|
|
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rpcrdma_recvcq_poll(cq, ep);
|
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}
|
|
|
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static void
|
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rpcrdma_flush_cqs(struct rpcrdma_ep *ep)
|
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{
|
|
struct ib_wc wc;
|
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LIST_HEAD(sched_list);
|
|
|
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while (ib_poll_cq(ep->rep_attr.recv_cq, 1, &wc) > 0)
|
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rpcrdma_recvcq_process_wc(&wc, &sched_list);
|
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if (!list_empty(&sched_list))
|
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rpcrdma_schedule_tasklet(&sched_list);
|
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while (ib_poll_cq(ep->rep_attr.send_cq, 1, &wc) > 0)
|
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rpcrdma_sendcq_process_wc(&wc);
|
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}
|
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
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static const char * const conn[] = {
|
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"address resolved",
|
|
"address error",
|
|
"route resolved",
|
|
"route error",
|
|
"connect request",
|
|
"connect response",
|
|
"connect error",
|
|
"unreachable",
|
|
"rejected",
|
|
"established",
|
|
"disconnected",
|
|
"device removal",
|
|
"multicast join",
|
|
"multicast error",
|
|
"address change",
|
|
"timewait exit",
|
|
};
|
|
|
|
#define CONNECTION_MSG(status) \
|
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((status) < ARRAY_SIZE(conn) ? \
|
|
conn[(status)] : "unrecognized connection error")
|
|
#endif
|
|
|
|
static int
|
|
rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event)
|
|
{
|
|
struct rpcrdma_xprt *xprt = id->context;
|
|
struct rpcrdma_ia *ia = &xprt->rx_ia;
|
|
struct rpcrdma_ep *ep = &xprt->rx_ep;
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
|
struct sockaddr *sap = (struct sockaddr *)&ep->rep_remote_addr;
|
|
#endif
|
|
struct ib_qp_attr *attr = &ia->ri_qp_attr;
|
|
struct ib_qp_init_attr *iattr = &ia->ri_qp_init_attr;
|
|
int connstate = 0;
|
|
|
|
switch (event->event) {
|
|
case RDMA_CM_EVENT_ADDR_RESOLVED:
|
|
case RDMA_CM_EVENT_ROUTE_RESOLVED:
|
|
ia->ri_async_rc = 0;
|
|
complete(&ia->ri_done);
|
|
break;
|
|
case RDMA_CM_EVENT_ADDR_ERROR:
|
|
ia->ri_async_rc = -EHOSTUNREACH;
|
|
dprintk("RPC: %s: CM address resolution error, ep 0x%p\n",
|
|
__func__, ep);
|
|
complete(&ia->ri_done);
|
|
break;
|
|
case RDMA_CM_EVENT_ROUTE_ERROR:
|
|
ia->ri_async_rc = -ENETUNREACH;
|
|
dprintk("RPC: %s: CM route resolution error, ep 0x%p\n",
|
|
__func__, ep);
|
|
complete(&ia->ri_done);
|
|
break;
|
|
case RDMA_CM_EVENT_ESTABLISHED:
|
|
connstate = 1;
|
|
ib_query_qp(ia->ri_id->qp, attr,
|
|
IB_QP_MAX_QP_RD_ATOMIC | IB_QP_MAX_DEST_RD_ATOMIC,
|
|
iattr);
|
|
dprintk("RPC: %s: %d responder resources"
|
|
" (%d initiator)\n",
|
|
__func__, attr->max_dest_rd_atomic,
|
|
attr->max_rd_atomic);
|
|
goto connected;
|
|
case RDMA_CM_EVENT_CONNECT_ERROR:
|
|
connstate = -ENOTCONN;
|
|
goto connected;
|
|
case RDMA_CM_EVENT_UNREACHABLE:
|
|
connstate = -ENETDOWN;
|
|
goto connected;
|
|
case RDMA_CM_EVENT_REJECTED:
|
|
connstate = -ECONNREFUSED;
|
|
goto connected;
|
|
case RDMA_CM_EVENT_DISCONNECTED:
|
|
connstate = -ECONNABORTED;
|
|
goto connected;
|
|
case RDMA_CM_EVENT_DEVICE_REMOVAL:
|
|
connstate = -ENODEV;
|
|
connected:
|
|
dprintk("RPC: %s: %sconnected\n",
|
|
__func__, connstate > 0 ? "" : "dis");
|
|
ep->rep_connected = connstate;
|
|
rpcrdma_conn_func(ep);
|
|
wake_up_all(&ep->rep_connect_wait);
|
|
/*FALLTHROUGH*/
|
|
default:
|
|
dprintk("RPC: %s: %pIS:%u (ep 0x%p): %s\n",
|
|
__func__, sap, rpc_get_port(sap), ep,
|
|
CONNECTION_MSG(event->event));
|
|
break;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
|
|
if (connstate == 1) {
|
|
int ird = attr->max_dest_rd_atomic;
|
|
int tird = ep->rep_remote_cma.responder_resources;
|
|
|
|
pr_info("rpcrdma: connection to %pIS:%u on %s, memreg '%s', %d credits, %d responders%s\n",
|
|
sap, rpc_get_port(sap),
|
|
ia->ri_id->device->name,
|
|
ia->ri_ops->ro_displayname,
|
|
xprt->rx_buf.rb_max_requests,
|
|
ird, ird < 4 && ird < tird / 2 ? " (low!)" : "");
|
|
} else if (connstate < 0) {
|
|
pr_info("rpcrdma: connection to %pIS:%u closed (%d)\n",
|
|
sap, rpc_get_port(sap), connstate);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct rdma_cm_id *
|
|
rpcrdma_create_id(struct rpcrdma_xprt *xprt,
|
|
struct rpcrdma_ia *ia, struct sockaddr *addr)
|
|
{
|
|
struct rdma_cm_id *id;
|
|
int rc;
|
|
|
|
init_completion(&ia->ri_done);
|
|
|
|
id = rdma_create_id(rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC);
|
|
if (IS_ERR(id)) {
|
|
rc = PTR_ERR(id);
|
|
dprintk("RPC: %s: rdma_create_id() failed %i\n",
|
|
__func__, rc);
|
|
return id;
|
|
}
|
|
|
|
ia->ri_async_rc = -ETIMEDOUT;
|
|
rc = rdma_resolve_addr(id, NULL, addr, RDMA_RESOLVE_TIMEOUT);
|
|
if (rc) {
|
|
dprintk("RPC: %s: rdma_resolve_addr() failed %i\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
wait_for_completion_interruptible_timeout(&ia->ri_done,
|
|
msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1);
|
|
rc = ia->ri_async_rc;
|
|
if (rc)
|
|
goto out;
|
|
|
|
ia->ri_async_rc = -ETIMEDOUT;
|
|
rc = rdma_resolve_route(id, RDMA_RESOLVE_TIMEOUT);
|
|
if (rc) {
|
|
dprintk("RPC: %s: rdma_resolve_route() failed %i\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
wait_for_completion_interruptible_timeout(&ia->ri_done,
|
|
msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT) + 1);
|
|
rc = ia->ri_async_rc;
|
|
if (rc)
|
|
goto out;
|
|
|
|
return id;
|
|
|
|
out:
|
|
rdma_destroy_id(id);
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
/*
|
|
* Drain any cq, prior to teardown.
|
|
*/
|
|
static void
|
|
rpcrdma_clean_cq(struct ib_cq *cq)
|
|
{
|
|
struct ib_wc wc;
|
|
int count = 0;
|
|
|
|
while (1 == ib_poll_cq(cq, 1, &wc))
|
|
++count;
|
|
|
|
if (count)
|
|
dprintk("RPC: %s: flushed %d events (last 0x%x)\n",
|
|
__func__, count, wc.opcode);
|
|
}
|
|
|
|
/*
|
|
* Exported functions.
|
|
*/
|
|
|
|
/*
|
|
* Open and initialize an Interface Adapter.
|
|
* o initializes fields of struct rpcrdma_ia, including
|
|
* interface and provider attributes and protection zone.
|
|
*/
|
|
int
|
|
rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg)
|
|
{
|
|
int rc, mem_priv;
|
|
struct rpcrdma_ia *ia = &xprt->rx_ia;
|
|
struct ib_device_attr *devattr = &ia->ri_devattr;
|
|
|
|
ia->ri_id = rpcrdma_create_id(xprt, ia, addr);
|
|
if (IS_ERR(ia->ri_id)) {
|
|
rc = PTR_ERR(ia->ri_id);
|
|
goto out1;
|
|
}
|
|
|
|
ia->ri_pd = ib_alloc_pd(ia->ri_id->device);
|
|
if (IS_ERR(ia->ri_pd)) {
|
|
rc = PTR_ERR(ia->ri_pd);
|
|
dprintk("RPC: %s: ib_alloc_pd() failed %i\n",
|
|
__func__, rc);
|
|
goto out2;
|
|
}
|
|
|
|
rc = ib_query_device(ia->ri_id->device, devattr);
|
|
if (rc) {
|
|
dprintk("RPC: %s: ib_query_device failed %d\n",
|
|
__func__, rc);
|
|
goto out3;
|
|
}
|
|
|
|
if (devattr->device_cap_flags & IB_DEVICE_LOCAL_DMA_LKEY) {
|
|
ia->ri_have_dma_lkey = 1;
|
|
ia->ri_dma_lkey = ia->ri_id->device->local_dma_lkey;
|
|
}
|
|
|
|
if (memreg == RPCRDMA_FRMR) {
|
|
/* Requires both frmr reg and local dma lkey */
|
|
if (((devattr->device_cap_flags &
|
|
(IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) !=
|
|
(IB_DEVICE_MEM_MGT_EXTENSIONS|IB_DEVICE_LOCAL_DMA_LKEY)) ||
|
|
(devattr->max_fast_reg_page_list_len == 0)) {
|
|
dprintk("RPC: %s: FRMR registration "
|
|
"not supported by HCA\n", __func__);
|
|
memreg = RPCRDMA_MTHCAFMR;
|
|
}
|
|
}
|
|
if (memreg == RPCRDMA_MTHCAFMR) {
|
|
if (!ia->ri_id->device->alloc_fmr) {
|
|
dprintk("RPC: %s: MTHCAFMR registration "
|
|
"not supported by HCA\n", __func__);
|
|
memreg = RPCRDMA_ALLPHYSICAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Optionally obtain an underlying physical identity mapping in
|
|
* order to do a memory window-based bind. This base registration
|
|
* is protected from remote access - that is enabled only by binding
|
|
* for the specific bytes targeted during each RPC operation, and
|
|
* revoked after the corresponding completion similar to a storage
|
|
* adapter.
|
|
*/
|
|
switch (memreg) {
|
|
case RPCRDMA_FRMR:
|
|
ia->ri_ops = &rpcrdma_frwr_memreg_ops;
|
|
break;
|
|
case RPCRDMA_ALLPHYSICAL:
|
|
ia->ri_ops = &rpcrdma_physical_memreg_ops;
|
|
mem_priv = IB_ACCESS_LOCAL_WRITE |
|
|
IB_ACCESS_REMOTE_WRITE |
|
|
IB_ACCESS_REMOTE_READ;
|
|
goto register_setup;
|
|
case RPCRDMA_MTHCAFMR:
|
|
ia->ri_ops = &rpcrdma_fmr_memreg_ops;
|
|
if (ia->ri_have_dma_lkey)
|
|
break;
|
|
mem_priv = IB_ACCESS_LOCAL_WRITE;
|
|
register_setup:
|
|
ia->ri_bind_mem = ib_get_dma_mr(ia->ri_pd, mem_priv);
|
|
if (IS_ERR(ia->ri_bind_mem)) {
|
|
printk(KERN_ALERT "%s: ib_get_dma_mr for "
|
|
"phys register failed with %lX\n",
|
|
__func__, PTR_ERR(ia->ri_bind_mem));
|
|
rc = -ENOMEM;
|
|
goto out3;
|
|
}
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "RPC: Unsupported memory "
|
|
"registration mode: %d\n", memreg);
|
|
rc = -ENOMEM;
|
|
goto out3;
|
|
}
|
|
dprintk("RPC: %s: memory registration strategy is '%s'\n",
|
|
__func__, ia->ri_ops->ro_displayname);
|
|
|
|
/* Else will do memory reg/dereg for each chunk */
|
|
ia->ri_memreg_strategy = memreg;
|
|
|
|
rwlock_init(&ia->ri_qplock);
|
|
return 0;
|
|
|
|
out3:
|
|
ib_dealloc_pd(ia->ri_pd);
|
|
ia->ri_pd = NULL;
|
|
out2:
|
|
rdma_destroy_id(ia->ri_id);
|
|
ia->ri_id = NULL;
|
|
out1:
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Clean up/close an IA.
|
|
* o if event handles and PD have been initialized, free them.
|
|
* o close the IA
|
|
*/
|
|
void
|
|
rpcrdma_ia_close(struct rpcrdma_ia *ia)
|
|
{
|
|
int rc;
|
|
|
|
dprintk("RPC: %s: entering\n", __func__);
|
|
if (ia->ri_bind_mem != NULL) {
|
|
rc = ib_dereg_mr(ia->ri_bind_mem);
|
|
dprintk("RPC: %s: ib_dereg_mr returned %i\n",
|
|
__func__, rc);
|
|
}
|
|
if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) {
|
|
if (ia->ri_id->qp)
|
|
rdma_destroy_qp(ia->ri_id);
|
|
rdma_destroy_id(ia->ri_id);
|
|
ia->ri_id = NULL;
|
|
}
|
|
if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) {
|
|
rc = ib_dealloc_pd(ia->ri_pd);
|
|
dprintk("RPC: %s: ib_dealloc_pd returned %i\n",
|
|
__func__, rc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create unconnected endpoint.
|
|
*/
|
|
int
|
|
rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia,
|
|
struct rpcrdma_create_data_internal *cdata)
|
|
{
|
|
struct ib_device_attr *devattr = &ia->ri_devattr;
|
|
struct ib_cq *sendcq, *recvcq;
|
|
int rc, err;
|
|
|
|
/* check provider's send/recv wr limits */
|
|
if (cdata->max_requests > devattr->max_qp_wr)
|
|
cdata->max_requests = devattr->max_qp_wr;
|
|
|
|
ep->rep_attr.event_handler = rpcrdma_qp_async_error_upcall;
|
|
ep->rep_attr.qp_context = ep;
|
|
ep->rep_attr.srq = NULL;
|
|
ep->rep_attr.cap.max_send_wr = cdata->max_requests;
|
|
rc = ia->ri_ops->ro_open(ia, ep, cdata);
|
|
if (rc)
|
|
return rc;
|
|
ep->rep_attr.cap.max_recv_wr = cdata->max_requests;
|
|
ep->rep_attr.cap.max_send_sge = (cdata->padding ? 4 : 2);
|
|
ep->rep_attr.cap.max_recv_sge = 1;
|
|
ep->rep_attr.cap.max_inline_data = 0;
|
|
ep->rep_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
|
|
ep->rep_attr.qp_type = IB_QPT_RC;
|
|
ep->rep_attr.port_num = ~0;
|
|
|
|
if (cdata->padding) {
|
|
ep->rep_padbuf = rpcrdma_alloc_regbuf(ia, cdata->padding,
|
|
GFP_KERNEL);
|
|
if (IS_ERR(ep->rep_padbuf))
|
|
return PTR_ERR(ep->rep_padbuf);
|
|
} else
|
|
ep->rep_padbuf = NULL;
|
|
|
|
dprintk("RPC: %s: requested max: dtos: send %d recv %d; "
|
|
"iovs: send %d recv %d\n",
|
|
__func__,
|
|
ep->rep_attr.cap.max_send_wr,
|
|
ep->rep_attr.cap.max_recv_wr,
|
|
ep->rep_attr.cap.max_send_sge,
|
|
ep->rep_attr.cap.max_recv_sge);
|
|
|
|
/* set trigger for requesting send completion */
|
|
ep->rep_cqinit = ep->rep_attr.cap.max_send_wr/2 - 1;
|
|
if (ep->rep_cqinit > RPCRDMA_MAX_UNSIGNALED_SENDS)
|
|
ep->rep_cqinit = RPCRDMA_MAX_UNSIGNALED_SENDS;
|
|
else if (ep->rep_cqinit <= 2)
|
|
ep->rep_cqinit = 0;
|
|
INIT_CQCOUNT(ep);
|
|
init_waitqueue_head(&ep->rep_connect_wait);
|
|
INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker);
|
|
|
|
sendcq = ib_create_cq(ia->ri_id->device, rpcrdma_sendcq_upcall,
|
|
rpcrdma_cq_async_error_upcall, ep,
|
|
ep->rep_attr.cap.max_send_wr + 1, 0);
|
|
if (IS_ERR(sendcq)) {
|
|
rc = PTR_ERR(sendcq);
|
|
dprintk("RPC: %s: failed to create send CQ: %i\n",
|
|
__func__, rc);
|
|
goto out1;
|
|
}
|
|
|
|
rc = ib_req_notify_cq(sendcq, IB_CQ_NEXT_COMP);
|
|
if (rc) {
|
|
dprintk("RPC: %s: ib_req_notify_cq failed: %i\n",
|
|
__func__, rc);
|
|
goto out2;
|
|
}
|
|
|
|
recvcq = ib_create_cq(ia->ri_id->device, rpcrdma_recvcq_upcall,
|
|
rpcrdma_cq_async_error_upcall, ep,
|
|
ep->rep_attr.cap.max_recv_wr + 1, 0);
|
|
if (IS_ERR(recvcq)) {
|
|
rc = PTR_ERR(recvcq);
|
|
dprintk("RPC: %s: failed to create recv CQ: %i\n",
|
|
__func__, rc);
|
|
goto out2;
|
|
}
|
|
|
|
rc = ib_req_notify_cq(recvcq, IB_CQ_NEXT_COMP);
|
|
if (rc) {
|
|
dprintk("RPC: %s: ib_req_notify_cq failed: %i\n",
|
|
__func__, rc);
|
|
ib_destroy_cq(recvcq);
|
|
goto out2;
|
|
}
|
|
|
|
ep->rep_attr.send_cq = sendcq;
|
|
ep->rep_attr.recv_cq = recvcq;
|
|
|
|
/* Initialize cma parameters */
|
|
|
|
/* RPC/RDMA does not use private data */
|
|
ep->rep_remote_cma.private_data = NULL;
|
|
ep->rep_remote_cma.private_data_len = 0;
|
|
|
|
/* Client offers RDMA Read but does not initiate */
|
|
ep->rep_remote_cma.initiator_depth = 0;
|
|
if (devattr->max_qp_rd_atom > 32) /* arbitrary but <= 255 */
|
|
ep->rep_remote_cma.responder_resources = 32;
|
|
else
|
|
ep->rep_remote_cma.responder_resources =
|
|
devattr->max_qp_rd_atom;
|
|
|
|
ep->rep_remote_cma.retry_count = 7;
|
|
ep->rep_remote_cma.flow_control = 0;
|
|
ep->rep_remote_cma.rnr_retry_count = 0;
|
|
|
|
return 0;
|
|
|
|
out2:
|
|
err = ib_destroy_cq(sendcq);
|
|
if (err)
|
|
dprintk("RPC: %s: ib_destroy_cq returned %i\n",
|
|
__func__, err);
|
|
out1:
|
|
rpcrdma_free_regbuf(ia, ep->rep_padbuf);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* rpcrdma_ep_destroy
|
|
*
|
|
* Disconnect and destroy endpoint. After this, the only
|
|
* valid operations on the ep are to free it (if dynamically
|
|
* allocated) or re-create it.
|
|
*/
|
|
void
|
|
rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
|
|
{
|
|
int rc;
|
|
|
|
dprintk("RPC: %s: entering, connected is %d\n",
|
|
__func__, ep->rep_connected);
|
|
|
|
cancel_delayed_work_sync(&ep->rep_connect_worker);
|
|
|
|
if (ia->ri_id->qp) {
|
|
rpcrdma_ep_disconnect(ep, ia);
|
|
rdma_destroy_qp(ia->ri_id);
|
|
ia->ri_id->qp = NULL;
|
|
}
|
|
|
|
rpcrdma_free_regbuf(ia, ep->rep_padbuf);
|
|
|
|
rpcrdma_clean_cq(ep->rep_attr.recv_cq);
|
|
rc = ib_destroy_cq(ep->rep_attr.recv_cq);
|
|
if (rc)
|
|
dprintk("RPC: %s: ib_destroy_cq returned %i\n",
|
|
__func__, rc);
|
|
|
|
rpcrdma_clean_cq(ep->rep_attr.send_cq);
|
|
rc = ib_destroy_cq(ep->rep_attr.send_cq);
|
|
if (rc)
|
|
dprintk("RPC: %s: ib_destroy_cq returned %i\n",
|
|
__func__, rc);
|
|
}
|
|
|
|
/*
|
|
* Connect unconnected endpoint.
|
|
*/
|
|
int
|
|
rpcrdma_ep_connect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
|
|
{
|
|
struct rdma_cm_id *id, *old;
|
|
int rc = 0;
|
|
int retry_count = 0;
|
|
|
|
if (ep->rep_connected != 0) {
|
|
struct rpcrdma_xprt *xprt;
|
|
retry:
|
|
dprintk("RPC: %s: reconnecting...\n", __func__);
|
|
|
|
rpcrdma_ep_disconnect(ep, ia);
|
|
rpcrdma_flush_cqs(ep);
|
|
|
|
xprt = container_of(ia, struct rpcrdma_xprt, rx_ia);
|
|
ia->ri_ops->ro_reset(xprt);
|
|
|
|
id = rpcrdma_create_id(xprt, ia,
|
|
(struct sockaddr *)&xprt->rx_data.addr);
|
|
if (IS_ERR(id)) {
|
|
rc = -EHOSTUNREACH;
|
|
goto out;
|
|
}
|
|
/* TEMP TEMP TEMP - fail if new device:
|
|
* Deregister/remarshal *all* requests!
|
|
* Close and recreate adapter, pd, etc!
|
|
* Re-determine all attributes still sane!
|
|
* More stuff I haven't thought of!
|
|
* Rrrgh!
|
|
*/
|
|
if (ia->ri_id->device != id->device) {
|
|
printk("RPC: %s: can't reconnect on "
|
|
"different device!\n", __func__);
|
|
rdma_destroy_id(id);
|
|
rc = -ENETUNREACH;
|
|
goto out;
|
|
}
|
|
/* END TEMP */
|
|
rc = rdma_create_qp(id, ia->ri_pd, &ep->rep_attr);
|
|
if (rc) {
|
|
dprintk("RPC: %s: rdma_create_qp failed %i\n",
|
|
__func__, rc);
|
|
rdma_destroy_id(id);
|
|
rc = -ENETUNREACH;
|
|
goto out;
|
|
}
|
|
|
|
write_lock(&ia->ri_qplock);
|
|
old = ia->ri_id;
|
|
ia->ri_id = id;
|
|
write_unlock(&ia->ri_qplock);
|
|
|
|
rdma_destroy_qp(old);
|
|
rdma_destroy_id(old);
|
|
} else {
|
|
dprintk("RPC: %s: connecting...\n", __func__);
|
|
rc = rdma_create_qp(ia->ri_id, ia->ri_pd, &ep->rep_attr);
|
|
if (rc) {
|
|
dprintk("RPC: %s: rdma_create_qp failed %i\n",
|
|
__func__, rc);
|
|
/* do not update ep->rep_connected */
|
|
return -ENETUNREACH;
|
|
}
|
|
}
|
|
|
|
ep->rep_connected = 0;
|
|
|
|
rc = rdma_connect(ia->ri_id, &ep->rep_remote_cma);
|
|
if (rc) {
|
|
dprintk("RPC: %s: rdma_connect() failed with %i\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
wait_event_interruptible(ep->rep_connect_wait, ep->rep_connected != 0);
|
|
|
|
/*
|
|
* Check state. A non-peer reject indicates no listener
|
|
* (ECONNREFUSED), which may be a transient state. All
|
|
* others indicate a transport condition which has already
|
|
* undergone a best-effort.
|
|
*/
|
|
if (ep->rep_connected == -ECONNREFUSED &&
|
|
++retry_count <= RDMA_CONNECT_RETRY_MAX) {
|
|
dprintk("RPC: %s: non-peer_reject, retry\n", __func__);
|
|
goto retry;
|
|
}
|
|
if (ep->rep_connected <= 0) {
|
|
/* Sometimes, the only way to reliably connect to remote
|
|
* CMs is to use same nonzero values for ORD and IRD. */
|
|
if (retry_count++ <= RDMA_CONNECT_RETRY_MAX + 1 &&
|
|
(ep->rep_remote_cma.responder_resources == 0 ||
|
|
ep->rep_remote_cma.initiator_depth !=
|
|
ep->rep_remote_cma.responder_resources)) {
|
|
if (ep->rep_remote_cma.responder_resources == 0)
|
|
ep->rep_remote_cma.responder_resources = 1;
|
|
ep->rep_remote_cma.initiator_depth =
|
|
ep->rep_remote_cma.responder_resources;
|
|
goto retry;
|
|
}
|
|
rc = ep->rep_connected;
|
|
} else {
|
|
dprintk("RPC: %s: connected\n", __func__);
|
|
}
|
|
|
|
out:
|
|
if (rc)
|
|
ep->rep_connected = rc;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* rpcrdma_ep_disconnect
|
|
*
|
|
* This is separate from destroy to facilitate the ability
|
|
* to reconnect without recreating the endpoint.
|
|
*
|
|
* This call is not reentrant, and must not be made in parallel
|
|
* on the same endpoint.
|
|
*/
|
|
void
|
|
rpcrdma_ep_disconnect(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia)
|
|
{
|
|
int rc;
|
|
|
|
rpcrdma_flush_cqs(ep);
|
|
rc = rdma_disconnect(ia->ri_id);
|
|
if (!rc) {
|
|
/* returns without wait if not connected */
|
|
wait_event_interruptible(ep->rep_connect_wait,
|
|
ep->rep_connected != 1);
|
|
dprintk("RPC: %s: after wait, %sconnected\n", __func__,
|
|
(ep->rep_connected == 1) ? "still " : "dis");
|
|
} else {
|
|
dprintk("RPC: %s: rdma_disconnect %i\n", __func__, rc);
|
|
ep->rep_connected = rc;
|
|
}
|
|
}
|
|
|
|
static struct rpcrdma_req *
|
|
rpcrdma_create_req(struct rpcrdma_xprt *r_xprt)
|
|
{
|
|
struct rpcrdma_req *req;
|
|
|
|
req = kzalloc(sizeof(*req), GFP_KERNEL);
|
|
if (req == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
req->rl_buffer = &r_xprt->rx_buf;
|
|
return req;
|
|
}
|
|
|
|
static struct rpcrdma_rep *
|
|
rpcrdma_create_rep(struct rpcrdma_xprt *r_xprt)
|
|
{
|
|
struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data;
|
|
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
|
|
struct rpcrdma_rep *rep;
|
|
int rc;
|
|
|
|
rc = -ENOMEM;
|
|
rep = kzalloc(sizeof(*rep), GFP_KERNEL);
|
|
if (rep == NULL)
|
|
goto out;
|
|
|
|
rep->rr_rdmabuf = rpcrdma_alloc_regbuf(ia, cdata->inline_rsize,
|
|
GFP_KERNEL);
|
|
if (IS_ERR(rep->rr_rdmabuf)) {
|
|
rc = PTR_ERR(rep->rr_rdmabuf);
|
|
goto out_free;
|
|
}
|
|
|
|
rep->rr_buffer = &r_xprt->rx_buf;
|
|
return rep;
|
|
|
|
out_free:
|
|
kfree(rep);
|
|
out:
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
int
|
|
rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt)
|
|
{
|
|
struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
|
|
struct rpcrdma_ia *ia = &r_xprt->rx_ia;
|
|
struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data;
|
|
char *p;
|
|
size_t len;
|
|
int i, rc;
|
|
|
|
buf->rb_max_requests = cdata->max_requests;
|
|
spin_lock_init(&buf->rb_lock);
|
|
|
|
/* Need to allocate:
|
|
* 1. arrays for send and recv pointers
|
|
* 2. arrays of struct rpcrdma_req to fill in pointers
|
|
* 3. array of struct rpcrdma_rep for replies
|
|
* Send/recv buffers in req/rep need to be registered
|
|
*/
|
|
len = buf->rb_max_requests *
|
|
(sizeof(struct rpcrdma_req *) + sizeof(struct rpcrdma_rep *));
|
|
|
|
p = kzalloc(len, GFP_KERNEL);
|
|
if (p == NULL) {
|
|
dprintk("RPC: %s: req_t/rep_t/pad kzalloc(%zd) failed\n",
|
|
__func__, len);
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
buf->rb_pool = p; /* for freeing it later */
|
|
|
|
buf->rb_send_bufs = (struct rpcrdma_req **) p;
|
|
p = (char *) &buf->rb_send_bufs[buf->rb_max_requests];
|
|
buf->rb_recv_bufs = (struct rpcrdma_rep **) p;
|
|
p = (char *) &buf->rb_recv_bufs[buf->rb_max_requests];
|
|
|
|
rc = ia->ri_ops->ro_init(r_xprt);
|
|
if (rc)
|
|
goto out;
|
|
|
|
for (i = 0; i < buf->rb_max_requests; i++) {
|
|
struct rpcrdma_req *req;
|
|
struct rpcrdma_rep *rep;
|
|
|
|
req = rpcrdma_create_req(r_xprt);
|
|
if (IS_ERR(req)) {
|
|
dprintk("RPC: %s: request buffer %d alloc"
|
|
" failed\n", __func__, i);
|
|
rc = PTR_ERR(req);
|
|
goto out;
|
|
}
|
|
buf->rb_send_bufs[i] = req;
|
|
|
|
rep = rpcrdma_create_rep(r_xprt);
|
|
if (IS_ERR(rep)) {
|
|
dprintk("RPC: %s: reply buffer %d alloc failed\n",
|
|
__func__, i);
|
|
rc = PTR_ERR(rep);
|
|
goto out;
|
|
}
|
|
buf->rb_recv_bufs[i] = rep;
|
|
}
|
|
|
|
return 0;
|
|
out:
|
|
rpcrdma_buffer_destroy(buf);
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
rpcrdma_destroy_rep(struct rpcrdma_ia *ia, struct rpcrdma_rep *rep)
|
|
{
|
|
if (!rep)
|
|
return;
|
|
|
|
rpcrdma_free_regbuf(ia, rep->rr_rdmabuf);
|
|
kfree(rep);
|
|
}
|
|
|
|
static void
|
|
rpcrdma_destroy_req(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
|
|
{
|
|
if (!req)
|
|
return;
|
|
|
|
rpcrdma_free_regbuf(ia, req->rl_sendbuf);
|
|
rpcrdma_free_regbuf(ia, req->rl_rdmabuf);
|
|
kfree(req);
|
|
}
|
|
|
|
void
|
|
rpcrdma_buffer_destroy(struct rpcrdma_buffer *buf)
|
|
{
|
|
struct rpcrdma_ia *ia = rdmab_to_ia(buf);
|
|
int i;
|
|
|
|
/* clean up in reverse order from create
|
|
* 1. recv mr memory (mr free, then kfree)
|
|
* 2. send mr memory (mr free, then kfree)
|
|
* 3. MWs
|
|
*/
|
|
dprintk("RPC: %s: entering\n", __func__);
|
|
|
|
for (i = 0; i < buf->rb_max_requests; i++) {
|
|
if (buf->rb_recv_bufs)
|
|
rpcrdma_destroy_rep(ia, buf->rb_recv_bufs[i]);
|
|
if (buf->rb_send_bufs)
|
|
rpcrdma_destroy_req(ia, buf->rb_send_bufs[i]);
|
|
}
|
|
|
|
ia->ri_ops->ro_destroy(buf);
|
|
|
|
kfree(buf->rb_pool);
|
|
}
|
|
|
|
/* "*mw" can be NULL when rpcrdma_buffer_get_mrs() fails, leaving
|
|
* some req segments uninitialized.
|
|
*/
|
|
static void
|
|
rpcrdma_buffer_put_mr(struct rpcrdma_mw **mw, struct rpcrdma_buffer *buf)
|
|
{
|
|
if (*mw) {
|
|
list_add_tail(&(*mw)->mw_list, &buf->rb_mws);
|
|
*mw = NULL;
|
|
}
|
|
}
|
|
|
|
/* Cycle mw's back in reverse order, and "spin" them.
|
|
* This delays and scrambles reuse as much as possible.
|
|
*/
|
|
static void
|
|
rpcrdma_buffer_put_mrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
|
|
{
|
|
struct rpcrdma_mr_seg *seg = req->rl_segments;
|
|
struct rpcrdma_mr_seg *seg1 = seg;
|
|
int i;
|
|
|
|
for (i = 1, seg++; i < RPCRDMA_MAX_SEGS; seg++, i++)
|
|
rpcrdma_buffer_put_mr(&seg->rl_mw, buf);
|
|
rpcrdma_buffer_put_mr(&seg1->rl_mw, buf);
|
|
}
|
|
|
|
static void
|
|
rpcrdma_buffer_put_sendbuf(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
|
|
{
|
|
buf->rb_send_bufs[--buf->rb_send_index] = req;
|
|
req->rl_niovs = 0;
|
|
if (req->rl_reply) {
|
|
buf->rb_recv_bufs[--buf->rb_recv_index] = req->rl_reply;
|
|
req->rl_reply->rr_func = NULL;
|
|
req->rl_reply = NULL;
|
|
}
|
|
}
|
|
|
|
/* rpcrdma_unmap_one() was already done during deregistration.
|
|
* Redo only the ib_post_send().
|
|
*/
|
|
static void
|
|
rpcrdma_retry_local_inv(struct rpcrdma_mw *r, struct rpcrdma_ia *ia)
|
|
{
|
|
struct rpcrdma_xprt *r_xprt =
|
|
container_of(ia, struct rpcrdma_xprt, rx_ia);
|
|
struct ib_send_wr invalidate_wr, *bad_wr;
|
|
int rc;
|
|
|
|
dprintk("RPC: %s: FRMR %p is stale\n", __func__, r);
|
|
|
|
/* When this FRMR is re-inserted into rb_mws, it is no longer stale */
|
|
r->r.frmr.fr_state = FRMR_IS_INVALID;
|
|
|
|
memset(&invalidate_wr, 0, sizeof(invalidate_wr));
|
|
invalidate_wr.wr_id = (unsigned long)(void *)r;
|
|
invalidate_wr.opcode = IB_WR_LOCAL_INV;
|
|
invalidate_wr.ex.invalidate_rkey = r->r.frmr.fr_mr->rkey;
|
|
DECR_CQCOUNT(&r_xprt->rx_ep);
|
|
|
|
dprintk("RPC: %s: frmr %p invalidating rkey %08x\n",
|
|
__func__, r, r->r.frmr.fr_mr->rkey);
|
|
|
|
read_lock(&ia->ri_qplock);
|
|
rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr);
|
|
read_unlock(&ia->ri_qplock);
|
|
if (rc) {
|
|
/* Force rpcrdma_buffer_get() to retry */
|
|
r->r.frmr.fr_state = FRMR_IS_STALE;
|
|
dprintk("RPC: %s: ib_post_send failed, %i\n",
|
|
__func__, rc);
|
|
}
|
|
}
|
|
|
|
static void
|
|
rpcrdma_retry_flushed_linv(struct list_head *stale,
|
|
struct rpcrdma_buffer *buf)
|
|
{
|
|
struct rpcrdma_ia *ia = rdmab_to_ia(buf);
|
|
struct list_head *pos;
|
|
struct rpcrdma_mw *r;
|
|
unsigned long flags;
|
|
|
|
list_for_each(pos, stale) {
|
|
r = list_entry(pos, struct rpcrdma_mw, mw_list);
|
|
rpcrdma_retry_local_inv(r, ia);
|
|
}
|
|
|
|
spin_lock_irqsave(&buf->rb_lock, flags);
|
|
list_splice_tail(stale, &buf->rb_mws);
|
|
spin_unlock_irqrestore(&buf->rb_lock, flags);
|
|
}
|
|
|
|
static struct rpcrdma_req *
|
|
rpcrdma_buffer_get_frmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf,
|
|
struct list_head *stale)
|
|
{
|
|
struct rpcrdma_mw *r;
|
|
int i;
|
|
|
|
i = RPCRDMA_MAX_SEGS - 1;
|
|
while (!list_empty(&buf->rb_mws)) {
|
|
r = list_entry(buf->rb_mws.next,
|
|
struct rpcrdma_mw, mw_list);
|
|
list_del(&r->mw_list);
|
|
if (r->r.frmr.fr_state == FRMR_IS_STALE) {
|
|
list_add(&r->mw_list, stale);
|
|
continue;
|
|
}
|
|
req->rl_segments[i].rl_mw = r;
|
|
if (unlikely(i-- == 0))
|
|
return req; /* Success */
|
|
}
|
|
|
|
/* Not enough entries on rb_mws for this req */
|
|
rpcrdma_buffer_put_sendbuf(req, buf);
|
|
rpcrdma_buffer_put_mrs(req, buf);
|
|
return NULL;
|
|
}
|
|
|
|
static struct rpcrdma_req *
|
|
rpcrdma_buffer_get_fmrs(struct rpcrdma_req *req, struct rpcrdma_buffer *buf)
|
|
{
|
|
struct rpcrdma_mw *r;
|
|
int i;
|
|
|
|
i = RPCRDMA_MAX_SEGS - 1;
|
|
while (!list_empty(&buf->rb_mws)) {
|
|
r = list_entry(buf->rb_mws.next,
|
|
struct rpcrdma_mw, mw_list);
|
|
list_del(&r->mw_list);
|
|
req->rl_segments[i].rl_mw = r;
|
|
if (unlikely(i-- == 0))
|
|
return req; /* Success */
|
|
}
|
|
|
|
/* Not enough entries on rb_mws for this req */
|
|
rpcrdma_buffer_put_sendbuf(req, buf);
|
|
rpcrdma_buffer_put_mrs(req, buf);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Get a set of request/reply buffers.
|
|
*
|
|
* Reply buffer (if needed) is attached to send buffer upon return.
|
|
* Rule:
|
|
* rb_send_index and rb_recv_index MUST always be pointing to the
|
|
* *next* available buffer (non-NULL). They are incremented after
|
|
* removing buffers, and decremented *before* returning them.
|
|
*/
|
|
struct rpcrdma_req *
|
|
rpcrdma_buffer_get(struct rpcrdma_buffer *buffers)
|
|
{
|
|
struct rpcrdma_ia *ia = rdmab_to_ia(buffers);
|
|
struct list_head stale;
|
|
struct rpcrdma_req *req;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&buffers->rb_lock, flags);
|
|
if (buffers->rb_send_index == buffers->rb_max_requests) {
|
|
spin_unlock_irqrestore(&buffers->rb_lock, flags);
|
|
dprintk("RPC: %s: out of request buffers\n", __func__);
|
|
return ((struct rpcrdma_req *)NULL);
|
|
}
|
|
|
|
req = buffers->rb_send_bufs[buffers->rb_send_index];
|
|
if (buffers->rb_send_index < buffers->rb_recv_index) {
|
|
dprintk("RPC: %s: %d extra receives outstanding (ok)\n",
|
|
__func__,
|
|
buffers->rb_recv_index - buffers->rb_send_index);
|
|
req->rl_reply = NULL;
|
|
} else {
|
|
req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index];
|
|
buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL;
|
|
}
|
|
buffers->rb_send_bufs[buffers->rb_send_index++] = NULL;
|
|
|
|
INIT_LIST_HEAD(&stale);
|
|
switch (ia->ri_memreg_strategy) {
|
|
case RPCRDMA_FRMR:
|
|
req = rpcrdma_buffer_get_frmrs(req, buffers, &stale);
|
|
break;
|
|
case RPCRDMA_MTHCAFMR:
|
|
req = rpcrdma_buffer_get_fmrs(req, buffers);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&buffers->rb_lock, flags);
|
|
if (!list_empty(&stale))
|
|
rpcrdma_retry_flushed_linv(&stale, buffers);
|
|
return req;
|
|
}
|
|
|
|
/*
|
|
* Put request/reply buffers back into pool.
|
|
* Pre-decrement counter/array index.
|
|
*/
|
|
void
|
|
rpcrdma_buffer_put(struct rpcrdma_req *req)
|
|
{
|
|
struct rpcrdma_buffer *buffers = req->rl_buffer;
|
|
struct rpcrdma_ia *ia = rdmab_to_ia(buffers);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&buffers->rb_lock, flags);
|
|
rpcrdma_buffer_put_sendbuf(req, buffers);
|
|
switch (ia->ri_memreg_strategy) {
|
|
case RPCRDMA_FRMR:
|
|
case RPCRDMA_MTHCAFMR:
|
|
rpcrdma_buffer_put_mrs(req, buffers);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&buffers->rb_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Recover reply buffers from pool.
|
|
* This happens when recovering from error conditions.
|
|
* Post-increment counter/array index.
|
|
*/
|
|
void
|
|
rpcrdma_recv_buffer_get(struct rpcrdma_req *req)
|
|
{
|
|
struct rpcrdma_buffer *buffers = req->rl_buffer;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&buffers->rb_lock, flags);
|
|
if (buffers->rb_recv_index < buffers->rb_max_requests) {
|
|
req->rl_reply = buffers->rb_recv_bufs[buffers->rb_recv_index];
|
|
buffers->rb_recv_bufs[buffers->rb_recv_index++] = NULL;
|
|
}
|
|
spin_unlock_irqrestore(&buffers->rb_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Put reply buffers back into pool when not attached to
|
|
* request. This happens in error conditions.
|
|
*/
|
|
void
|
|
rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep)
|
|
{
|
|
struct rpcrdma_buffer *buffers = rep->rr_buffer;
|
|
unsigned long flags;
|
|
|
|
rep->rr_func = NULL;
|
|
spin_lock_irqsave(&buffers->rb_lock, flags);
|
|
buffers->rb_recv_bufs[--buffers->rb_recv_index] = rep;
|
|
spin_unlock_irqrestore(&buffers->rb_lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Wrappers for internal-use kmalloc memory registration, used by buffer code.
|
|
*/
|
|
|
|
void
|
|
rpcrdma_mapping_error(struct rpcrdma_mr_seg *seg)
|
|
{
|
|
dprintk("RPC: map_one: offset %p iova %llx len %zu\n",
|
|
seg->mr_offset,
|
|
(unsigned long long)seg->mr_dma, seg->mr_dmalen);
|
|
}
|
|
|
|
static int
|
|
rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len,
|
|
struct ib_mr **mrp, struct ib_sge *iov)
|
|
{
|
|
struct ib_phys_buf ipb;
|
|
struct ib_mr *mr;
|
|
int rc;
|
|
|
|
/*
|
|
* All memory passed here was kmalloc'ed, therefore phys-contiguous.
|
|
*/
|
|
iov->addr = ib_dma_map_single(ia->ri_id->device,
|
|
va, len, DMA_BIDIRECTIONAL);
|
|
if (ib_dma_mapping_error(ia->ri_id->device, iov->addr))
|
|
return -ENOMEM;
|
|
|
|
iov->length = len;
|
|
|
|
if (ia->ri_have_dma_lkey) {
|
|
*mrp = NULL;
|
|
iov->lkey = ia->ri_dma_lkey;
|
|
return 0;
|
|
} else if (ia->ri_bind_mem != NULL) {
|
|
*mrp = NULL;
|
|
iov->lkey = ia->ri_bind_mem->lkey;
|
|
return 0;
|
|
}
|
|
|
|
ipb.addr = iov->addr;
|
|
ipb.size = iov->length;
|
|
mr = ib_reg_phys_mr(ia->ri_pd, &ipb, 1,
|
|
IB_ACCESS_LOCAL_WRITE, &iov->addr);
|
|
|
|
dprintk("RPC: %s: phys convert: 0x%llx "
|
|
"registered 0x%llx length %d\n",
|
|
__func__, (unsigned long long)ipb.addr,
|
|
(unsigned long long)iov->addr, len);
|
|
|
|
if (IS_ERR(mr)) {
|
|
*mrp = NULL;
|
|
rc = PTR_ERR(mr);
|
|
dprintk("RPC: %s: failed with %i\n", __func__, rc);
|
|
} else {
|
|
*mrp = mr;
|
|
iov->lkey = mr->lkey;
|
|
rc = 0;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
rpcrdma_deregister_internal(struct rpcrdma_ia *ia,
|
|
struct ib_mr *mr, struct ib_sge *iov)
|
|
{
|
|
int rc;
|
|
|
|
ib_dma_unmap_single(ia->ri_id->device,
|
|
iov->addr, iov->length, DMA_BIDIRECTIONAL);
|
|
|
|
if (NULL == mr)
|
|
return 0;
|
|
|
|
rc = ib_dereg_mr(mr);
|
|
if (rc)
|
|
dprintk("RPC: %s: ib_dereg_mr failed %i\n", __func__, rc);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* rpcrdma_alloc_regbuf - kmalloc and register memory for SEND/RECV buffers
|
|
* @ia: controlling rpcrdma_ia
|
|
* @size: size of buffer to be allocated, in bytes
|
|
* @flags: GFP flags
|
|
*
|
|
* Returns pointer to private header of an area of internally
|
|
* registered memory, or an ERR_PTR. The registered buffer follows
|
|
* the end of the private header.
|
|
*
|
|
* xprtrdma uses a regbuf for posting an outgoing RDMA SEND, or for
|
|
* receiving the payload of RDMA RECV operations. regbufs are not
|
|
* used for RDMA READ/WRITE operations, thus are registered only for
|
|
* LOCAL access.
|
|
*/
|
|
struct rpcrdma_regbuf *
|
|
rpcrdma_alloc_regbuf(struct rpcrdma_ia *ia, size_t size, gfp_t flags)
|
|
{
|
|
struct rpcrdma_regbuf *rb;
|
|
int rc;
|
|
|
|
rc = -ENOMEM;
|
|
rb = kmalloc(sizeof(*rb) + size, flags);
|
|
if (rb == NULL)
|
|
goto out;
|
|
|
|
rb->rg_size = size;
|
|
rb->rg_owner = NULL;
|
|
rc = rpcrdma_register_internal(ia, rb->rg_base, size,
|
|
&rb->rg_mr, &rb->rg_iov);
|
|
if (rc)
|
|
goto out_free;
|
|
|
|
return rb;
|
|
|
|
out_free:
|
|
kfree(rb);
|
|
out:
|
|
return ERR_PTR(rc);
|
|
}
|
|
|
|
/**
|
|
* rpcrdma_free_regbuf - deregister and free registered buffer
|
|
* @ia: controlling rpcrdma_ia
|
|
* @rb: regbuf to be deregistered and freed
|
|
*/
|
|
void
|
|
rpcrdma_free_regbuf(struct rpcrdma_ia *ia, struct rpcrdma_regbuf *rb)
|
|
{
|
|
if (rb) {
|
|
rpcrdma_deregister_internal(ia, rb->rg_mr, &rb->rg_iov);
|
|
kfree(rb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Prepost any receive buffer, then post send.
|
|
*
|
|
* Receive buffer is donated to hardware, reclaimed upon recv completion.
|
|
*/
|
|
int
|
|
rpcrdma_ep_post(struct rpcrdma_ia *ia,
|
|
struct rpcrdma_ep *ep,
|
|
struct rpcrdma_req *req)
|
|
{
|
|
struct ib_send_wr send_wr, *send_wr_fail;
|
|
struct rpcrdma_rep *rep = req->rl_reply;
|
|
int rc;
|
|
|
|
if (rep) {
|
|
rc = rpcrdma_ep_post_recv(ia, ep, rep);
|
|
if (rc)
|
|
goto out;
|
|
req->rl_reply = NULL;
|
|
}
|
|
|
|
send_wr.next = NULL;
|
|
send_wr.wr_id = RPCRDMA_IGNORE_COMPLETION;
|
|
send_wr.sg_list = req->rl_send_iov;
|
|
send_wr.num_sge = req->rl_niovs;
|
|
send_wr.opcode = IB_WR_SEND;
|
|
if (send_wr.num_sge == 4) /* no need to sync any pad (constant) */
|
|
ib_dma_sync_single_for_device(ia->ri_id->device,
|
|
req->rl_send_iov[3].addr, req->rl_send_iov[3].length,
|
|
DMA_TO_DEVICE);
|
|
ib_dma_sync_single_for_device(ia->ri_id->device,
|
|
req->rl_send_iov[1].addr, req->rl_send_iov[1].length,
|
|
DMA_TO_DEVICE);
|
|
ib_dma_sync_single_for_device(ia->ri_id->device,
|
|
req->rl_send_iov[0].addr, req->rl_send_iov[0].length,
|
|
DMA_TO_DEVICE);
|
|
|
|
if (DECR_CQCOUNT(ep) > 0)
|
|
send_wr.send_flags = 0;
|
|
else { /* Provider must take a send completion every now and then */
|
|
INIT_CQCOUNT(ep);
|
|
send_wr.send_flags = IB_SEND_SIGNALED;
|
|
}
|
|
|
|
rc = ib_post_send(ia->ri_id->qp, &send_wr, &send_wr_fail);
|
|
if (rc)
|
|
dprintk("RPC: %s: ib_post_send returned %i\n", __func__,
|
|
rc);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* (Re)post a receive buffer.
|
|
*/
|
|
int
|
|
rpcrdma_ep_post_recv(struct rpcrdma_ia *ia,
|
|
struct rpcrdma_ep *ep,
|
|
struct rpcrdma_rep *rep)
|
|
{
|
|
struct ib_recv_wr recv_wr, *recv_wr_fail;
|
|
int rc;
|
|
|
|
recv_wr.next = NULL;
|
|
recv_wr.wr_id = (u64) (unsigned long) rep;
|
|
recv_wr.sg_list = &rep->rr_rdmabuf->rg_iov;
|
|
recv_wr.num_sge = 1;
|
|
|
|
ib_dma_sync_single_for_cpu(ia->ri_id->device,
|
|
rdmab_addr(rep->rr_rdmabuf),
|
|
rdmab_length(rep->rr_rdmabuf),
|
|
DMA_BIDIRECTIONAL);
|
|
|
|
rc = ib_post_recv(ia->ri_id->qp, &recv_wr, &recv_wr_fail);
|
|
|
|
if (rc)
|
|
dprintk("RPC: %s: ib_post_recv returned %i\n", __func__,
|
|
rc);
|
|
return rc;
|
|
}
|
|
|
|
/* How many chunk list items fit within our inline buffers?
|
|
*/
|
|
unsigned int
|
|
rpcrdma_max_segments(struct rpcrdma_xprt *r_xprt)
|
|
{
|
|
struct rpcrdma_create_data_internal *cdata = &r_xprt->rx_data;
|
|
int bytes, segments;
|
|
|
|
bytes = min_t(unsigned int, cdata->inline_wsize, cdata->inline_rsize);
|
|
bytes -= RPCRDMA_HDRLEN_MIN;
|
|
if (bytes < sizeof(struct rpcrdma_segment) * 2) {
|
|
pr_warn("RPC: %s: inline threshold too small\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
|
|
segments = 1 << (fls(bytes / sizeof(struct rpcrdma_segment)) - 1);
|
|
dprintk("RPC: %s: max chunk list size = %d segments\n",
|
|
__func__, segments);
|
|
return segments;
|
|
}
|