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121 lines
4.0 KiB
121 lines
4.0 KiB
/* |
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* Copyright (c) 2006 Oracle. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/sysctl.h> |
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#include <linux/proc_fs.h> |
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#include "ib.h" |
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static struct ctl_table_header *rds_ib_sysctl_hdr; |
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unsigned long rds_ib_sysctl_max_send_wr = RDS_IB_DEFAULT_SEND_WR; |
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unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR; |
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unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE; |
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static unsigned long rds_ib_sysctl_max_wr_min = 1; |
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/* hardware will fail CQ creation long before this */ |
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static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0; |
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unsigned long rds_ib_sysctl_max_unsig_wrs = 16; |
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static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1; |
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static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64; |
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/* |
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* This sysctl does nothing. |
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* |
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* Backwards compatibility with RDS 3.0 wire protocol |
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* disables initial FC credit exchange. |
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* If it's ever possible to drop 3.0 support, |
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* setting this to 1 and moving init/refill of send/recv |
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* rings from ib_cm_connect_complete() back into ib_setup_qp() |
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* will cause credits to be added before protocol negotiation. |
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*/ |
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unsigned int rds_ib_sysctl_flow_control = 0; |
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static struct ctl_table rds_ib_sysctl_table[] = { |
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{ |
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.procname = "max_send_wr", |
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.data = &rds_ib_sysctl_max_send_wr, |
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.maxlen = sizeof(unsigned long), |
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.mode = 0644, |
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.proc_handler = proc_doulongvec_minmax, |
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.extra1 = &rds_ib_sysctl_max_wr_min, |
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.extra2 = &rds_ib_sysctl_max_wr_max, |
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}, |
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{ |
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.procname = "max_recv_wr", |
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.data = &rds_ib_sysctl_max_recv_wr, |
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.maxlen = sizeof(unsigned long), |
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.mode = 0644, |
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.proc_handler = proc_doulongvec_minmax, |
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.extra1 = &rds_ib_sysctl_max_wr_min, |
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.extra2 = &rds_ib_sysctl_max_wr_max, |
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}, |
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{ |
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.procname = "max_unsignaled_wr", |
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.data = &rds_ib_sysctl_max_unsig_wrs, |
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.maxlen = sizeof(unsigned long), |
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.mode = 0644, |
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.proc_handler = proc_doulongvec_minmax, |
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.extra1 = &rds_ib_sysctl_max_unsig_wr_min, |
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.extra2 = &rds_ib_sysctl_max_unsig_wr_max, |
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}, |
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{ |
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.procname = "max_recv_allocation", |
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.data = &rds_ib_sysctl_max_recv_allocation, |
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.maxlen = sizeof(unsigned long), |
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.mode = 0644, |
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.proc_handler = proc_doulongvec_minmax, |
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}, |
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{ |
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.procname = "flow_control", |
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.data = &rds_ib_sysctl_flow_control, |
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.maxlen = sizeof(rds_ib_sysctl_flow_control), |
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.mode = 0644, |
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.proc_handler = proc_dointvec, |
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}, |
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{ } |
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}; |
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void rds_ib_sysctl_exit(void) |
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{ |
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if (rds_ib_sysctl_hdr) |
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unregister_net_sysctl_table(rds_ib_sysctl_hdr); |
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} |
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int rds_ib_sysctl_init(void) |
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{ |
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rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table); |
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if (!rds_ib_sysctl_hdr) |
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return -ENOMEM; |
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return 0; |
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}
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