Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 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 | |
Andy Grover | 68cb01c | 2009-07-17 13:13:30 +0000 | [diff] [blame] | 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; |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 63 | |
stephen hemminger | ff51bf8 | 2010-10-19 08:08:33 +0000 | [diff] [blame] | 64 | static ctl_table rds_ib_sysctl_table[] = { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 65 | { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 66 | .procname = "max_send_wr", |
| 67 | .data = &rds_ib_sysctl_max_send_wr, |
| 68 | .maxlen = sizeof(unsigned long), |
| 69 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 70 | .proc_handler = proc_doulongvec_minmax, |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 71 | .extra1 = &rds_ib_sysctl_max_wr_min, |
| 72 | .extra2 = &rds_ib_sysctl_max_wr_max, |
| 73 | }, |
| 74 | { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 75 | .procname = "max_recv_wr", |
| 76 | .data = &rds_ib_sysctl_max_recv_wr, |
| 77 | .maxlen = sizeof(unsigned long), |
| 78 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 79 | .proc_handler = proc_doulongvec_minmax, |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 80 | .extra1 = &rds_ib_sysctl_max_wr_min, |
| 81 | .extra2 = &rds_ib_sysctl_max_wr_max, |
| 82 | }, |
| 83 | { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 84 | .procname = "max_unsignaled_wr", |
| 85 | .data = &rds_ib_sysctl_max_unsig_wrs, |
| 86 | .maxlen = sizeof(unsigned long), |
| 87 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 88 | .proc_handler = proc_doulongvec_minmax, |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 89 | .extra1 = &rds_ib_sysctl_max_unsig_wr_min, |
| 90 | .extra2 = &rds_ib_sysctl_max_unsig_wr_max, |
| 91 | }, |
| 92 | { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 93 | .procname = "max_recv_allocation", |
| 94 | .data = &rds_ib_sysctl_max_recv_allocation, |
| 95 | .maxlen = sizeof(unsigned long), |
| 96 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 97 | .proc_handler = proc_doulongvec_minmax, |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 98 | }, |
| 99 | { |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 100 | .procname = "flow_control", |
| 101 | .data = &rds_ib_sysctl_flow_control, |
| 102 | .maxlen = sizeof(rds_ib_sysctl_flow_control), |
| 103 | .mode = 0644, |
Eric W. Biederman | 6d45611 | 2009-11-16 03:11:48 -0800 | [diff] [blame] | 104 | .proc_handler = proc_dointvec, |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 105 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 106 | { } |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 107 | }; |
| 108 | |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 109 | void rds_ib_sysctl_exit(void) |
| 110 | { |
| 111 | if (rds_ib_sysctl_hdr) |
Eric W. Biederman | 5dd3df1 | 2012-04-19 13:24:33 +0000 | [diff] [blame] | 112 | unregister_net_sysctl_table(rds_ib_sysctl_hdr); |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 113 | } |
| 114 | |
Zach Brown | ef87b7e | 2010-07-09 12:26:20 -0700 | [diff] [blame] | 115 | int rds_ib_sysctl_init(void) |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 116 | { |
Eric W. Biederman | ec8f23c | 2012-04-19 13:44:49 +0000 | [diff] [blame^] | 117 | rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table); |
Andy Grover | 8690bfa | 2010-01-12 11:56:44 -0800 | [diff] [blame] | 118 | if (!rds_ib_sysctl_hdr) |
Andy Grover | e6babe4 | 2009-02-24 15:30:35 +0000 | [diff] [blame] | 119 | return -ENOMEM; |
| 120 | return 0; |
| 121 | } |