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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 | /* |
53 | * This sysctl does nothing. |
54 | * |
55 | * Backwards compatibility with RDS 3.0 wire protocol |
56 | * disables initial FC credit exchange. |
57 | * If it's ever possible to drop 3.0 support, |
58 | * setting this to 1 and moving init/refill of send/recv |
59 | * rings from ib_cm_connect_complete() back into ib_setup_qp() |
60 | * will cause credits to be added before protocol negotiation. |
61 | */ |
62 | unsigned int rds_ib_sysctl_flow_control = 0; |
63 | |
64 | static struct ctl_table rds_ib_sysctl_table[] = { |
65 | { |
66 | .procname = "max_send_wr", |
67 | .data = &rds_ib_sysctl_max_send_wr, |
68 | .maxlen = sizeof(unsigned long), |
69 | .mode = 0644, |
70 | .proc_handler = proc_doulongvec_minmax, |
71 | .extra1 = &rds_ib_sysctl_max_wr_min, |
72 | .extra2 = &rds_ib_sysctl_max_wr_max, |
73 | }, |
74 | { |
75 | .procname = "max_recv_wr", |
76 | .data = &rds_ib_sysctl_max_recv_wr, |
77 | .maxlen = sizeof(unsigned long), |
78 | .mode = 0644, |
79 | .proc_handler = proc_doulongvec_minmax, |
80 | .extra1 = &rds_ib_sysctl_max_wr_min, |
81 | .extra2 = &rds_ib_sysctl_max_wr_max, |
82 | }, |
83 | { |
84 | .procname = "max_unsignaled_wr", |
85 | .data = &rds_ib_sysctl_max_unsig_wrs, |
86 | .maxlen = sizeof(unsigned long), |
87 | .mode = 0644, |
88 | .proc_handler = proc_doulongvec_minmax, |
89 | .extra1 = &rds_ib_sysctl_max_unsig_wr_min, |
90 | .extra2 = &rds_ib_sysctl_max_unsig_wr_max, |
91 | }, |
92 | { |
93 | .procname = "max_recv_allocation", |
94 | .data = &rds_ib_sysctl_max_recv_allocation, |
95 | .maxlen = sizeof(unsigned long), |
96 | .mode = 0644, |
97 | .proc_handler = proc_doulongvec_minmax, |
98 | }, |
99 | { |
100 | .procname = "flow_control", |
101 | .data = &rds_ib_sysctl_flow_control, |
102 | .maxlen = sizeof(rds_ib_sysctl_flow_control), |
103 | .mode = 0644, |
104 | .proc_handler = proc_dointvec, |
105 | }, |
106 | { } |
107 | }; |
108 | |
109 | void rds_ib_sysctl_exit(void) |
110 | { |
111 | if (rds_ib_sysctl_hdr) |
112 | unregister_net_sysctl_table(rds_ib_sysctl_hdr); |
113 | } |
114 | |
115 | int rds_ib_sysctl_init(void) |
116 | { |
117 | rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table); |
118 | if (!rds_ib_sysctl_hdr) |
119 | return -ENOMEM; |
120 | return 0; |
121 | } |
122 |
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v2.6.34-rc5
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