[linux.git] / net / rds / 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;

/*
 * 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;

static struct 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_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,
	},
	{ }
};

void rds_ib_sysctl_exit(void)
{
	if (rds_ib_sysctl_hdr)
		unregister_net_sysctl_table(rds_ib_sysctl_hdr);
}

int rds_ib_sysctl_init(void)
{
	rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table);
	if (!rds_ib_sysctl_hdr)
		return -ENOMEM;
	return 0;
}
Commit	Line	Data
e6babe4c AG	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
68cb01c1 AG	52	/*
	53	* This sysctl does nothing.
	54	*
	55	* Backwards compatibility with RDS 3.0 wire protocol
	56	* disables initial FC credit exchange.
	57	* If it's ever possible to drop 3.0 support,
	58	* setting this to 1 and moving init/refill of send/recv
	59	* rings from ib_cm_connect_complete() back into ib_setup_qp()
	60	* will cause credits to be added before protocol negotiation.
	61	*/
	62	unsigned int rds_ib_sysctl_flow_control = 0;
e6babe4c	63
fe2c6338	64	static struct ctl_table rds_ib_sysctl_table[] = {
e6babe4c	65	{
e6babe4c AG	66	.procname = "max_send_wr",
	67	.data = &rds_ib_sysctl_max_send_wr,
	68	.maxlen = sizeof(unsigned long),
	69	.mode = 0644,
6d456111	70	.proc_handler = proc_doulongvec_minmax,
e6babe4c AG	71	.extra1 = &rds_ib_sysctl_max_wr_min,
	72	.extra2 = &rds_ib_sysctl_max_wr_max,
	73	},
	74	{
e6babe4c AG	75	.procname = "max_recv_wr",
	76	.data = &rds_ib_sysctl_max_recv_wr,
	77	.maxlen = sizeof(unsigned long),
	78	.mode = 0644,
6d456111	79	.proc_handler = proc_doulongvec_minmax,
e6babe4c AG	80	.extra1 = &rds_ib_sysctl_max_wr_min,
	81	.extra2 = &rds_ib_sysctl_max_wr_max,
	82	},
	83	{
e6babe4c AG	84	.procname = "max_unsignaled_wr",
	85	.data = &rds_ib_sysctl_max_unsig_wrs,
	86	.maxlen = sizeof(unsigned long),
	87	.mode = 0644,
6d456111	88	.proc_handler = proc_doulongvec_minmax,
e6babe4c AG	89	.extra1 = &rds_ib_sysctl_max_unsig_wr_min,
	90	.extra2 = &rds_ib_sysctl_max_unsig_wr_max,
	91	},
e6babe4c	92	{
e6babe4c AG	93	.procname = "max_recv_allocation",
	94	.data = &rds_ib_sysctl_max_recv_allocation,
	95	.maxlen = sizeof(unsigned long),
	96	.mode = 0644,
6d456111	97	.proc_handler = proc_doulongvec_minmax,
e6babe4c AG	98	},
e6babe4c AG	99	{
e6babe4c AG	100	.procname = "flow_control",
	101	.data = &rds_ib_sysctl_flow_control,
	102	.maxlen = sizeof(rds_ib_sysctl_flow_control),
	103	.mode = 0644,
6d456111	104	.proc_handler = proc_dointvec,
e6babe4c	105	},
f8572d8f	106	{ }
e6babe4c AG	107	};
e6babe4c AG	108
e6babe4c AG	109	void rds_ib_sysctl_exit(void)
	110	{
	111	if (rds_ib_sysctl_hdr)
5dd3df10	112	unregister_net_sysctl_table(rds_ib_sysctl_hdr);
e6babe4c AG	113	}
e6babe4c AG	114
ef87b7ea	115	int rds_ib_sysctl_init(void)
e6babe4c	116	{
ec8f23ce	117	rds_ib_sysctl_hdr = register_net_sysctl(&init_net, "net/rds/ib", rds_ib_sysctl_table);
8690bfa1	118	if (!rds_ib_sysctl_hdr)
e6babe4c AG	119	return -ENOMEM;
	120	return 0;
	121	}