/*
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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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