Revision 6f335a7afa6bc57603f39430dc6f9e57de288a91 authored by Ben Skeggs on 29 March 2010, 00:06:09 UTC, committed by Ben Skeggs on 09 April 2010, 00:15:38 UTC
This value interacts with some registers we don't currently know how to program properly ourselves. The default of 5 that we were using matches what the VBIOS on early DP cards do, but later ones use 6, which would cause nouveau to program an incorrect mode on these chips. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
1 parent d327dd4
ib_sysctl.c
/*
* Copyright (c) 2006 Oracle. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/kernel.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include "ib.h"
static struct ctl_table_header *rds_ib_sysctl_hdr;
unsigned long rds_ib_sysctl_max_send_wr = RDS_IB_DEFAULT_SEND_WR;
unsigned long rds_ib_sysctl_max_recv_wr = RDS_IB_DEFAULT_RECV_WR;
unsigned long rds_ib_sysctl_max_recv_allocation = (128 * 1024 * 1024) / RDS_FRAG_SIZE;
static unsigned long rds_ib_sysctl_max_wr_min = 1;
/* hardware will fail CQ creation long before this */
static unsigned long rds_ib_sysctl_max_wr_max = (u32)~0;
unsigned long rds_ib_sysctl_max_unsig_wrs = 16;
static unsigned long rds_ib_sysctl_max_unsig_wr_min = 1;
static unsigned long rds_ib_sysctl_max_unsig_wr_max = 64;
unsigned long rds_ib_sysctl_max_unsig_bytes = (16 << 20);
static unsigned long rds_ib_sysctl_max_unsig_bytes_min = 1;
static unsigned long rds_ib_sysctl_max_unsig_bytes_max = ~0UL;
/*
* This sysctl does nothing.
*
* Backwards compatibility with RDS 3.0 wire protocol
* disables initial FC credit exchange.
* If it's ever possible to drop 3.0 support,
* setting this to 1 and moving init/refill of send/recv
* rings from ib_cm_connect_complete() back into ib_setup_qp()
* will cause credits to be added before protocol negotiation.
*/
unsigned int rds_ib_sysctl_flow_control = 0;
ctl_table rds_ib_sysctl_table[] = {
{
.procname = "max_send_wr",
.data = &rds_ib_sysctl_max_send_wr,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
.extra1 = &rds_ib_sysctl_max_wr_min,
.extra2 = &rds_ib_sysctl_max_wr_max,
},
{
.procname = "max_recv_wr",
.data = &rds_ib_sysctl_max_recv_wr,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
.extra1 = &rds_ib_sysctl_max_wr_min,
.extra2 = &rds_ib_sysctl_max_wr_max,
},
{
.procname = "max_unsignaled_wr",
.data = &rds_ib_sysctl_max_unsig_wrs,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
.extra1 = &rds_ib_sysctl_max_unsig_wr_min,
.extra2 = &rds_ib_sysctl_max_unsig_wr_max,
},
{
.procname = "max_unsignaled_bytes",
.data = &rds_ib_sysctl_max_unsig_bytes,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
.extra1 = &rds_ib_sysctl_max_unsig_bytes_min,
.extra2 = &rds_ib_sysctl_max_unsig_bytes_max,
},
{
.procname = "max_recv_allocation",
.data = &rds_ib_sysctl_max_recv_allocation,
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
},
{
.procname = "flow_control",
.data = &rds_ib_sysctl_flow_control,
.maxlen = sizeof(rds_ib_sysctl_flow_control),
.mode = 0644,
.proc_handler = proc_dointvec,
},
{ }
};
static struct ctl_path rds_ib_sysctl_path[] = {
{ .procname = "net", },
{ .procname = "rds", },
{ .procname = "ib", },
{ }
};
void rds_ib_sysctl_exit(void)
{
if (rds_ib_sysctl_hdr)
unregister_sysctl_table(rds_ib_sysctl_hdr);
}
int __init rds_ib_sysctl_init(void)
{
rds_ib_sysctl_hdr = register_sysctl_paths(rds_ib_sysctl_path, rds_ib_sysctl_table);
if (rds_ib_sysctl_hdr == NULL)
return -ENOMEM;
return 0;
}
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