blob: 84b5ffcb280f92d2a12c623291f7bc9d8a8805a2 [file] [log] [blame]
Andy Grovere6babe42009-02-24 15:30:35 +00001/*
2 * Copyright (c) 2006 Oracle. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 *
32 */
33#include <linux/kernel.h>
34#include <linux/sysctl.h>
35#include <linux/proc_fs.h>
36
37#include "ib.h"
38
39static struct ctl_table_header *rds_ib_sysctl_hdr;
40
41unsigned long rds_ib_sysctl_max_send_wr = RDS_IB_DEFAULT_SEND_WR;
42unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR;
43unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
44static unsigned long rds_ib_sysctl_max_wr_min = 1;
45/* hardware will fail CQ creation long before this */
46static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0;
47
48unsigned long rds_ib_sysctl_max_unsig_wrs = 16;
49static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1;
50static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64;
51
52unsigned long rds_ib_sysctl_max_unsig_bytes = (16 << 20);
53static unsigned long rds_ib_sysctl_max_unsig_bytes_min = 1;
54static unsigned long rds_ib_sysctl_max_unsig_bytes_max = ~0UL;
55
Andy Grover68cb01c2009-07-17 13:13:30 +000056/*
57 * This sysctl does nothing.
58 *
59 * Backwards compatibility with RDS 3.0 wire protocol
60 * disables initial FC credit exchange.
61 * If it's ever possible to drop 3.0 support,
62 * setting this to 1 and moving init/refill of send/recv
63 * rings from ib_cm_connect_complete() back into ib_setup_qp()
64 * will cause credits to be added before protocol negotiation.
65 */
66unsigned int rds_ib_sysctl_flow_control = 0;
Andy Grovere6babe42009-02-24 15:30:35 +000067
68ctl_table rds_ib_sysctl_table[] = {
69 {
70 .ctl_name = CTL_UNNUMBERED,
71 .procname = "max_send_wr",
72 .data = &rds_ib_sysctl_max_send_wr,
73 .maxlen = sizeof(unsigned long),
74 .mode = 0644,
75 .proc_handler = &proc_doulongvec_minmax,
76 .extra1 = &rds_ib_sysctl_max_wr_min,
77 .extra2 = &rds_ib_sysctl_max_wr_max,
78 },
79 {
80 .ctl_name = CTL_UNNUMBERED,
81 .procname = "max_recv_wr",
82 .data = &rds_ib_sysctl_max_recv_wr,
83 .maxlen = sizeof(unsigned long),
84 .mode = 0644,
85 .proc_handler = &proc_doulongvec_minmax,
86 .extra1 = &rds_ib_sysctl_max_wr_min,
87 .extra2 = &rds_ib_sysctl_max_wr_max,
88 },
89 {
90 .ctl_name = CTL_UNNUMBERED,
91 .procname = "max_unsignaled_wr",
92 .data = &rds_ib_sysctl_max_unsig_wrs,
93 .maxlen = sizeof(unsigned long),
94 .mode = 0644,
95 .proc_handler = &proc_doulongvec_minmax,
96 .extra1 = &rds_ib_sysctl_max_unsig_wr_min,
97 .extra2 = &rds_ib_sysctl_max_unsig_wr_max,
98 },
99 {
100 .ctl_name = CTL_UNNUMBERED,
101 .procname = "max_unsignaled_bytes",
102 .data = &rds_ib_sysctl_max_unsig_bytes,
103 .maxlen = sizeof(unsigned long),
104 .mode = 0644,
105 .proc_handler = &proc_doulongvec_minmax,
106 .extra1 = &rds_ib_sysctl_max_unsig_bytes_min,
107 .extra2 = &rds_ib_sysctl_max_unsig_bytes_max,
108 },
109 {
110 .ctl_name = CTL_UNNUMBERED,
111 .procname = "max_recv_allocation",
112 .data = &rds_ib_sysctl_max_recv_allocation,
113 .maxlen = sizeof(unsigned long),
114 .mode = 0644,
115 .proc_handler = &proc_doulongvec_minmax,
116 },
117 {
118 .ctl_name = CTL_UNNUMBERED,
119 .procname = "flow_control",
120 .data = &rds_ib_sysctl_flow_control,
121 .maxlen = sizeof(rds_ib_sysctl_flow_control),
122 .mode = 0644,
123 .proc_handler = &proc_dointvec,
124 },
125 { .ctl_name = 0}
126};
127
128static struct ctl_path rds_ib_sysctl_path[] = {
129 { .procname = "net", .ctl_name = CTL_NET, },
130 { .procname = "rds", .ctl_name = CTL_UNNUMBERED, },
131 { .procname = "ib", .ctl_name = CTL_UNNUMBERED, },
132 { }
133};
134
135void rds_ib_sysctl_exit(void)
136{
137 if (rds_ib_sysctl_hdr)
138 unregister_sysctl_table(rds_ib_sysctl_hdr);
139}
140
141int __init rds_ib_sysctl_init(void)
142{
143 rds_ib_sysctl_hdr = register_sysctl_paths(rds_ib_sysctl_path, rds_ib_sysctl_table);
144 if (rds_ib_sysctl_hdr == NULL)
145 return -ENOMEM;
146 return 0;
147}