[ofa-general] [RFC,PATCH 04/10] rdma: SVCRDMA Transport Module
Tom Tucker
tom at opengridcomputing.com
Mon Aug 20 12:01:32 PDT 2007
This file implements the RDMA transport module initialization and
termination logic and registers the transport sysctl variables.
Signed-off-by: Tom Tucker <tom at opengridcomputing.com>
---
net/sunrpc/svc_rdma.c | 270 +++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 270 insertions(+), 0 deletions(-)
diff --git a/net/sunrpc/svc_rdma.c b/net/sunrpc/svc_rdma.c
new file mode 100644
index 0000000..620249d
--- /dev/null
+++ b/net/sunrpc/svc_rdma.c
@@ -0,0 +1,270 @@
+/*
+ * Copyright (c) 2005-2006 Network Appliance, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the BSD-type
+ * license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * Neither the name of the Network Appliance, Inc. nor the names of
+ * its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Author: Tom Tucker <tom at opengridcomputing.com>
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/sysctl.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/svc_rdma.h>
+
+#define RPCDBG_FACILITY RPCDBG_SVCXPRT
+
+/* RPC/RDMA parameters */
+unsigned int svcrdma_ord = RPCRDMA_ORD;
+static unsigned int min_ord = 1;
+static unsigned int max_ord = 4096;
+unsigned int svcrdma_max_requests = RPCRDMA_MAX_REQUESTS;
+static unsigned int min_max_requests = 4;
+static unsigned int max_max_requests = 16384;
+unsigned int svcrdma_max_req_size = RPCRDMA_MAX_REQ_SIZE;
+static unsigned int min_max_inline = 4096;
+static unsigned int max_max_inline = 65536;
+static unsigned int zero = 0;
+static unsigned int one = 1;
+
+unsigned int rdma_stat_recv = 0;
+unsigned int rdma_stat_read = 0;
+unsigned int rdma_stat_write = 0;
+unsigned int rdma_stat_sq_starve = 0;
+unsigned int rdma_stat_rq_starve = 0;
+unsigned int rdma_stat_rq_poll = 0;
+unsigned int rdma_stat_rq_prod = 0;
+unsigned int rdma_stat_sq_poll = 0;
+unsigned int rdma_stat_sq_prod = 0;
+
+extern struct svc_xprt svc_rdma_xprt;
+
+static struct ctl_table_header *svcrdma_table_header;
+static ctl_table svcrdma_parm_table[] = {
+ {
+ .ctl_name = CTL_RDMA_MAX_REQUESTS,
+ .procname = "max_requests",
+ .data = &svcrdma_max_requests,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &min_max_requests,
+ .extra2 = &max_max_requests
+ },
+ {
+ .ctl_name = CTL_RDMA_MAX_REQ_SIZE,
+ .procname = "max_req_size",
+ .data = &svcrdma_max_req_size,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &min_max_inline,
+ .extra2 = &max_max_inline
+ },
+ {
+ .ctl_name = CTL_RDMA_ORD,
+ .procname = "max_outbound_read_requests",
+ .data = &svcrdma_ord,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &min_ord,
+ .extra2 = &max_ord,
+ },
+
+ {
+ .ctl_name = CTL_RDMA_STAT_READ,
+ .procname = "rdma_stat_read",
+ .data = &rdma_stat_read,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_RECV,
+ .procname = "rdma_stat_recv",
+ .data = &rdma_stat_recv,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_WRITE,
+ .procname = "rdma_stat_write",
+ .data = &rdma_stat_write,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_SQ_STARVE,
+ .procname = "rdma_stat_sq_starve",
+ .data = &rdma_stat_sq_starve,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_RQ_STARVE,
+ .procname = "rdma_stat_rq_starve",
+ .data = &rdma_stat_rq_starve,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_RQ_POLL,
+ .procname = "rdma_stat_rq_poll",
+ .data = &rdma_stat_rq_poll,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_RQ_PROD,
+ .procname = "rdma_stat_rq_prod",
+ .data = &rdma_stat_rq_prod,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_SQ_POLL,
+ .procname = "rdma_stat_sq_poll",
+ .data = &rdma_stat_sq_poll,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = CTL_RDMA_STAT_SQ_PROD,
+ .procname = "rdma_stat_sq_prod",
+ .data = &rdma_stat_sq_prod,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+ {
+ .ctl_name = 0,
+ },
+};
+
+static ctl_table svcrdma_table[] = {
+ {
+ .ctl_name = CTL_SVCRDMA,
+ .procname = "svc_rdma",
+ .mode = 0555,
+ .child = svcrdma_parm_table
+ },
+ {
+ .ctl_name = 0,
+ },
+};
+
+static ctl_table svcrdma_root_table[] = {
+ {
+ .ctl_name = CTL_SUNRPC,
+ .procname = "sunrpc",
+ .mode = 0555,
+ .child = svcrdma_table
+ },
+ {
+ .ctl_name = 0,
+ },
+};
+
+void svc_rdma_cleanup(void)
+{
+ dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n");
+ if (svcrdma_table_header) {
+ unregister_sysctl_table(svcrdma_table_header);
+ svcrdma_table_header = NULL;
+ }
+ svc_unregister_transport(&svc_rdma_xprt);
+}
+
+int svc_rdma_init(void)
+{
+ dprintk("SVCRDMA Module Init, register RPC RDMA transport\n");
+ dprintk("\tsvcrdma_ord : %d\n", svcrdma_ord);
+ dprintk("\tmax_requests : %d\n", svcrdma_max_requests);
+ dprintk("\tsq_depth : %d\n",
+ svcrdma_max_requests * RPCRDMA_SQ_DEPTH_MULT);
+ dprintk("\tmax_inline : %d\n", svcrdma_max_req_size);
+ if (!svcrdma_table_header) {
+ svcrdma_table_header =
+ register_sysctl_table(svcrdma_root_table);
+ }
+ /* Register RDMA with the SVC transport switch */
+ svc_register_transport(&svc_rdma_xprt);
+ return 0;
+}
+MODULE_AUTHOR("Tom Tucker <tom at opengridcomputing.com>");
+MODULE_DESCRIPTION("SVC RDMA Transport");
+MODULE_LICENSE("Dual BSD/GPL");
+module_init(svc_rdma_init);
+module_exit(svc_rdma_cleanup);
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