net/rds/iw_sysctl.c

   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 "iw.h"
  38
  39 static struct ctl_table_header *rds_iw_sysctl_hdr;
  40
  41 unsigned long rds_iw_sysctl_max_send_wr = RDS_IW_DEFAULT_SEND_WR;
  42 unsigned long rds_iw_sysctl_max_recv_wr = RDS_IW_DEFAULT_RECV_WR;
  43 unsigned long rds_iw_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
  44 static unsigned long rds_iw_sysctl_max_wr_min = 1;
  45 /* hardware will fail CQ creation long before this */
  46 static unsigned long rds_iw_sysctl_max_wr_max = (u32)~0;
  47
  48 unsigned long rds_iw_sysctl_max_unsig_wrs = 16;
  49 static unsigned long rds_iw_sysctl_max_unsig_wr_min = 1;
  50 static unsigned long rds_iw_sysctl_max_unsig_wr_max = 64;
  51
  52 unsigned long rds_iw_sysctl_max_unsig_bytes = (16 << 20);
  53 static unsigned long rds_iw_sysctl_max_unsig_bytes_min = 1;
  54 static unsigned long rds_iw_sysctl_max_unsig_bytes_max = ~0UL;
  55
  56 unsigned int rds_iw_sysctl_flow_control = 1;
  57
  58 static ctl_table rds_iw_sysctl_table[] = {
  59         {
  60                 .procname       = "max_send_wr",
  61                 .data           = &rds_iw_sysctl_max_send_wr,
  62                 .maxlen         = sizeof(unsigned long),
  63                 .mode           = 0644,
  64                 .proc_handler   = proc_doulongvec_minmax,
  65                 .extra1         = &rds_iw_sysctl_max_wr_min,
  66                 .extra2         = &rds_iw_sysctl_max_wr_max,
  67         },
  68         {
  69                 .procname       = "max_recv_wr",
  70                 .data           = &rds_iw_sysctl_max_recv_wr,
  71                 .maxlen         = sizeof(unsigned long),
  72                 .mode           = 0644,
  73                 .proc_handler   = proc_doulongvec_minmax,
  74                 .extra1         = &rds_iw_sysctl_max_wr_min,
  75                 .extra2         = &rds_iw_sysctl_max_wr_max,
  76         },
  77         {
  78                 .procname       = "max_unsignaled_wr",
  79                 .data           = &rds_iw_sysctl_max_unsig_wrs,
  80                 .maxlen         = sizeof(unsigned long),
  81                 .mode           = 0644,
  82                 .proc_handler   = proc_doulongvec_minmax,
  83                 .extra1         = &rds_iw_sysctl_max_unsig_wr_min,
  84                 .extra2         = &rds_iw_sysctl_max_unsig_wr_max,
  85         },
  86         {
  87                 .procname       = "max_unsignaled_bytes",
  88                 .data           = &rds_iw_sysctl_max_unsig_bytes,
  89                 .maxlen         = sizeof(unsigned long),
  90                 .mode           = 0644,
  91                 .proc_handler   = proc_doulongvec_minmax,
  92                 .extra1         = &rds_iw_sysctl_max_unsig_bytes_min,
  93                 .extra2         = &rds_iw_sysctl_max_unsig_bytes_max,
  94         },
  95         {
  96                 .procname       = "max_recv_allocation",
  97                 .data           = &rds_iw_sysctl_max_recv_allocation,
  98                 .maxlen         = sizeof(unsigned long),
  99                 .mode           = 0644,
 100                 .proc_handler   = proc_doulongvec_minmax,
 101         },
 102         {
 103                 .procname       = "flow_control",
 104                 .data           = &rds_iw_sysctl_flow_control,
 105                 .maxlen         = sizeof(rds_iw_sysctl_flow_control),
 106                 .mode           = 0644,
 107                 .proc_handler   = proc_dointvec,
 108         },
 109         { }
 110 };
 111
 112 static struct ctl_path rds_iw_sysctl_path[] = {
 113         { .procname = "net", },
 114         { .procname = "rds", },
 115         { .procname = "iw", },
 116         { }
 117 };
 118
 119 void rds_iw_sysctl_exit(void)
 120 {
 121         if (rds_iw_sysctl_hdr)
 122                 unregister_sysctl_table(rds_iw_sysctl_hdr);
 123 }
 124
 125 int rds_iw_sysctl_init(void)
 126 {
 127         rds_iw_sysctl_hdr = register_sysctl_paths(rds_iw_sysctl_path, rds_iw_sysctl_table);
 128         if (!rds_iw_sysctl_hdr)
 129                 return -ENOMEM;
 130         return 0;
 131 }