From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/net/9p/trans_rdma.c | 45 ++++++++++++++++++++-------------------------
1 files changed, 20 insertions(+), 25 deletions(-)
diff --git a/kernel/net/9p/trans_rdma.c b/kernel/net/9p/trans_rdma.c
index 119103b..7217bd9 100644
--- a/kernel/net/9p/trans_rdma.c
+++ b/kernel/net/9p/trans_rdma.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/fs/9p/trans_rdma.c
*
@@ -8,22 +9,6 @@
* Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -109,14 +94,15 @@
struct completion cm_done;
};
+struct p9_rdma_req;
+
/**
- * p9_rdma_context - Keeps track of in-process WR
+ * struct p9_rdma_context - Keeps track of in-process WR
*
* @busa: Bus address to unmap when the WR completes
* @req: Keeps track of requests (send)
* @rc: Keepts track of replies (receive)
*/
-struct p9_rdma_req;
struct p9_rdma_context {
struct ib_cqe cqe;
dma_addr_t busa;
@@ -127,7 +113,7 @@
};
/**
- * p9_rdma_opts - Collection of mount options
+ * struct p9_rdma_opts - Collection of mount options
* @port: port of connection
* @sq_depth: The requested depth of the SQ. This really doesn't need
* to be any deeper than the number of threads used in the client
@@ -400,6 +386,7 @@
struct p9_trans_rdma *rdma = client->trans;
struct ib_recv_wr wr;
struct ib_sge sge;
+ int ret;
c->busa = ib_dma_map_single(rdma->cm_id->device,
c->rc.sdata, client->msize,
@@ -417,7 +404,12 @@
wr.wr_cqe = &c->cqe;
wr.sg_list = &sge;
wr.num_sge = 1;
- return ib_post_recv(rdma->qp, &wr, NULL);
+
+ ret = ib_post_recv(rdma->qp, &wr, NULL);
+ if (ret)
+ ib_dma_unmap_single(rdma->cm_id->device, c->busa,
+ client->msize, DMA_FROM_DEVICE);
+ return ret;
error:
p9_debug(P9_DEBUG_ERROR, "EIO\n");
@@ -514,7 +506,7 @@
if (down_interruptible(&rdma->sq_sem)) {
err = -EINTR;
- goto send_error;
+ goto dma_unmap;
}
/* Mark request as `sent' *before* we actually send it,
@@ -524,11 +516,14 @@
req->status = REQ_STATUS_SENT;
err = ib_post_send(rdma->qp, &wr, NULL);
if (err)
- goto send_error;
+ goto dma_unmap;
/* Success */
return 0;
+dma_unmap:
+ ib_dma_unmap_single(rdma->cm_id->device, c->busa,
+ c->req->tc.size, DMA_TO_DEVICE);
/* Handle errors that happened during or while preparing the send: */
send_error:
req->status = REQ_STATUS_ERROR;
@@ -700,9 +695,9 @@
goto error;
/* Create the Completion Queue */
- rdma->cq = ib_alloc_cq(rdma->cm_id->device, client,
- opts.sq_depth + opts.rq_depth + 1,
- 0, IB_POLL_SOFTIRQ);
+ rdma->cq = ib_alloc_cq_any(rdma->cm_id->device, client,
+ opts.sq_depth + opts.rq_depth + 1,
+ IB_POLL_SOFTIRQ);
if (IS_ERR(rdma->cq))
goto error;
--
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