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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 | } |