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