1 /*
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
39 static struct ctl_table_header *rds_ib_sysctl_hdr;
40
41 unsigned long rds_ib_sysctl_max_send_wr = RDS_IB_DEFAULT_SEND_WR;
42 unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR;
43 unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
44 static unsigned long rds_ib_sysctl_max_wr_min = 1;
45 /* hardware will fail CQ creation long before this */
46 static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0;
47
48 unsigned long rds_ib_sysctl_max_unsig_wrs = 16;
49 static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1;
50 static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64;
51
52 unsigned long rds_ib_sysctl_max_unsig_bytes = (16 << 20);
53 static unsigned long rds_ib_sysctl_max_unsig_bytes_min = 1;
54 static unsigned long rds_ib_sysctl_max_unsig_bytes_max = ~0UL;
55
56 unsigned int rds_ib_sysctl_flow_control = 1;
57
58 ctl_table rds_ib_sysctl_table[] = {
59 {
60 .ctl_name = CTL_UNNUMBERED,
61 .procname = "max_send_wr",
62 .data = &rds_ib_sysctl_max_send_wr,
63 .maxlen = sizeof(unsigned long),
64 .mode = 0644,
65 .proc_handler = &proc_doulongvec_minmax,
66 .extra1 = &rds_ib_sysctl_max_wr_min,
67 .extra2 = &rds_ib_sysctl_max_wr_max,
68 },
69 {
70 .ctl_name = CTL_UNNUMBERED,
71 .procname = "max_recv_wr",
72 .data = &rds_ib_sysctl_max_recv_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_unsignaled_wr",
82 .data = &rds_ib_sysctl_max_unsig_wrs,
83 .maxlen = sizeof(unsigned long),
84 .mode = 0644,
85 .proc_handler = &proc_doulongvec_minmax,
86 .extra1 = &rds_ib_sysctl_max_unsig_wr_min,
87 .extra2 = &rds_ib_sysctl_max_unsig_wr_max,
88 },
89 {
90 .ctl_name = CTL_UNNUMBERED,
91 .procname = "max_unsignaled_bytes",
92 .data = &rds_ib_sysctl_max_unsig_bytes,
93 .maxlen = sizeof(unsigned long),
94 .mode = 0644,
95 .proc_handler = &proc_doulongvec_minmax,
96 .extra1 = &rds_ib_sysctl_max_unsig_bytes_min,
97 .extra2 = &rds_ib_sysctl_max_unsig_bytes_max,
98 },
99 {
100 .ctl_name = CTL_UNNUMBERED,
101 .procname = "max_recv_allocation",
102 .data = &rds_ib_sysctl_max_recv_allocation,
103 .maxlen = sizeof(unsigned long),
104 .mode = 0644,
105 .proc_handler = &proc_doulongvec_minmax,
106 },
107 {
108 .ctl_name = CTL_UNNUMBERED,
109 .procname = "flow_control",
110 .data = &rds_ib_sysctl_flow_control,
111 .maxlen = sizeof(rds_ib_sysctl_flow_control),
112 .mode = 0644,
113 .proc_handler = &proc_dointvec,
114 },
115 { .ctl_name = 0}
116 };
117
118 static struct ctl_path rds_ib_sysctl_path[] = {
119 { .procname = "net", .ctl_name = CTL_NET, },
120 { .procname = "rds", .ctl_name = CTL_UNNUMBERED, },
121 { .procname = "ib", .ctl_name = CTL_UNNUMBERED, },
122 { }
123 };
124
125 void rds_ib_sysctl_exit(void)
126 {
127 if (rds_ib_sysctl_hdr)
128 unregister_sysctl_table(rds_ib_sysctl_hdr);
129 }
130
131 int __init rds_ib_sysctl_init(void)
132 {
133 rds_ib_sysctl_hdr = register_sysctl_paths(rds_ib_sysctl_path, rds_ib_sysctl_table);
134 if (rds_ib_sysctl_hdr == NULL)
135 return -ENOMEM;
136 return 0;
137 }
138
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