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// SPDX-License-Identifier: GPL-2.0
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lnet/klnds/o2iblnd/o2iblnd_modparams.c
*
* Author: Eric Barton <eric@bartonsoftware.com>
*/
#include "o2iblnd.h"
static int service = 987;
module_param(service, int, 0444);
MODULE_PARM_DESC(service, "service number (within RDMA_PS_TCP)");
static int cksum;
module_param(cksum, int, 0644);
MODULE_PARM_DESC(cksum, "set non-zero to enable message (not RDMA) checksums");
static int timeout = 50;
module_param(timeout, int, 0644);
MODULE_PARM_DESC(timeout, "timeout (seconds)");
/*
* Number of threads in each scheduler pool which is percpt,
* we will estimate reasonable value based on CPUs if it's set to zero.
*/
static int nscheds;
module_param(nscheds, int, 0444);
MODULE_PARM_DESC(nscheds, "number of threads in each scheduler pool");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int ntx = 512;
module_param(ntx, int, 0444);
MODULE_PARM_DESC(ntx, "# of message descriptors allocated for each pool");
/* NB: this value is shared by all CPTs */
static int credits = 256;
module_param(credits, int, 0444);
MODULE_PARM_DESC(credits, "# concurrent sends");
static int peer_credits = 8;
module_param(peer_credits, int, 0444);
MODULE_PARM_DESC(peer_credits, "# concurrent sends to 1 peer");
static int peer_credits_hiw;
module_param(peer_credits_hiw, int, 0444);
MODULE_PARM_DESC(peer_credits_hiw, "when eagerly to return credits");
static int peer_buffer_credits;
module_param(peer_buffer_credits, int, 0444);
MODULE_PARM_DESC(peer_buffer_credits, "# per-peer router buffer credits");
static int peer_timeout = 180;
module_param(peer_timeout, int, 0444);
MODULE_PARM_DESC(peer_timeout, "Seconds without aliveness news to declare peer dead (<=0 to disable)");
static char *ipif_name = "ib0";
module_param(ipif_name, charp, 0444);
MODULE_PARM_DESC(ipif_name, "IPoIB interface name");
static int retry_count = 5;
module_param(retry_count, int, 0644);
MODULE_PARM_DESC(retry_count, "Retransmissions when no ACK received");
static int rnr_retry_count = 6;
module_param(rnr_retry_count, int, 0644);
MODULE_PARM_DESC(rnr_retry_count, "RNR retransmissions");
static int keepalive = 100;
module_param(keepalive, int, 0644);
MODULE_PARM_DESC(keepalive, "Idle time in seconds before sending a keepalive");
static int ib_mtu;
module_param(ib_mtu, int, 0444);
MODULE_PARM_DESC(ib_mtu, "IB MTU 256/512/1024/2048/4096");
static int concurrent_sends;
module_param(concurrent_sends, int, 0444);
MODULE_PARM_DESC(concurrent_sends, "send work-queue sizing");
#define IBLND_DEFAULT_MAP_ON_DEMAND IBLND_MAX_RDMA_FRAGS
static int map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
module_param(map_on_demand, int, 0444);
MODULE_PARM_DESC(map_on_demand, "map on demand");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int fmr_pool_size = 512;
module_param(fmr_pool_size, int, 0444);
MODULE_PARM_DESC(fmr_pool_size, "size of fmr pool on each CPT (>= ntx / 4)");
/* NB: this value is shared by all CPTs, it can grow at runtime */
static int fmr_flush_trigger = 384;
module_param(fmr_flush_trigger, int, 0444);
MODULE_PARM_DESC(fmr_flush_trigger, "# dirty FMRs that triggers pool flush");
static int fmr_cache = 1;
module_param(fmr_cache, int, 0444);
MODULE_PARM_DESC(fmr_cache, "non-zero to enable FMR caching");
/*
* 0: disable failover
* 1: enable failover if necessary
* 2: force to failover (for debug)
*/
static int dev_failover;
module_param(dev_failover, int, 0444);
MODULE_PARM_DESC(dev_failover, "HCA failover for bonding (0 off, 1 on, other values reserved)");
static int require_privileged_port;
module_param(require_privileged_port, int, 0644);
MODULE_PARM_DESC(require_privileged_port, "require privileged port when accepting connection");
static int use_privileged_port = 1;
module_param(use_privileged_port, int, 0644);
MODULE_PARM_DESC(use_privileged_port, "use privileged port when initiating connection");
struct kib_tunables kiblnd_tunables = {
.kib_dev_failover = &dev_failover,
.kib_service = &service,
.kib_cksum = &cksum,
.kib_timeout = &timeout,
.kib_keepalive = &keepalive,
.kib_ntx = &ntx,
.kib_default_ipif = &ipif_name,
.kib_retry_count = &retry_count,
.kib_rnr_retry_count = &rnr_retry_count,
.kib_ib_mtu = &ib_mtu,
.kib_require_priv_port = &require_privileged_port,
.kib_use_priv_port = &use_privileged_port,
.kib_nscheds = &nscheds
};
static struct lnet_ioctl_config_o2iblnd_tunables default_tunables;
/* # messages/RDMAs in-flight */
int kiblnd_msg_queue_size(int version, struct lnet_ni *ni)
{
if (version == IBLND_MSG_VERSION_1)
return IBLND_MSG_QUEUE_SIZE_V1;
else if (ni)
return ni->ni_peertxcredits;
else
return peer_credits;
}
int kiblnd_tunables_setup(struct lnet_ni *ni)
{
struct lnet_ioctl_config_o2iblnd_tunables *tunables;
/*
* if there was no tunables specified, setup the tunables to be
* defaulted
*/
if (!ni->ni_lnd_tunables) {
ni->ni_lnd_tunables = kzalloc(sizeof(*ni->ni_lnd_tunables),
GFP_NOFS);
if (!ni->ni_lnd_tunables)
return -ENOMEM;
memcpy(&ni->ni_lnd_tunables->lt_tun_u.lt_o2ib,
&default_tunables, sizeof(*tunables));
}
tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
/* Current API version */
tunables->lnd_version = 0;
if (kiblnd_translate_mtu(*kiblnd_tunables.kib_ib_mtu) < 0) {
CERROR("Invalid ib_mtu %d, expected 256/512/1024/2048/4096\n",
*kiblnd_tunables.kib_ib_mtu);
return -EINVAL;
}
if (!ni->ni_peertimeout)
ni->ni_peertimeout = peer_timeout;
if (!ni->ni_maxtxcredits)
ni->ni_maxtxcredits = credits;
if (!ni->ni_peertxcredits)
ni->ni_peertxcredits = peer_credits;
if (!ni->ni_peerrtrcredits)
ni->ni_peerrtrcredits = peer_buffer_credits;
if (ni->ni_peertxcredits < IBLND_CREDITS_DEFAULT)
ni->ni_peertxcredits = IBLND_CREDITS_DEFAULT;
if (ni->ni_peertxcredits > IBLND_CREDITS_MAX)
ni->ni_peertxcredits = IBLND_CREDITS_MAX;
if (ni->ni_peertxcredits > credits)
ni->ni_peertxcredits = credits;
if (!tunables->lnd_peercredits_hiw)
tunables->lnd_peercredits_hiw = peer_credits_hiw;
if (tunables->lnd_peercredits_hiw < ni->ni_peertxcredits / 2)
tunables->lnd_peercredits_hiw = ni->ni_peertxcredits / 2;
if (tunables->lnd_peercredits_hiw >= ni->ni_peertxcredits)
tunables->lnd_peercredits_hiw = ni->ni_peertxcredits - 1;
if (tunables->lnd_map_on_demand <= 0 ||
tunables->lnd_map_on_demand > IBLND_MAX_RDMA_FRAGS) {
/* Use the default */
CWARN("Invalid map_on_demand (%d), expects 1 - %d. Using default of %d\n",
tunables->lnd_map_on_demand,
IBLND_MAX_RDMA_FRAGS, IBLND_DEFAULT_MAP_ON_DEMAND);
tunables->lnd_map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
}
if (tunables->lnd_map_on_demand == 1) {
/* don't make sense to create map if only one fragment */
tunables->lnd_map_on_demand = 2;
}
if (!tunables->lnd_concurrent_sends) {
if (tunables->lnd_map_on_demand > 0 &&
tunables->lnd_map_on_demand <= IBLND_MAX_RDMA_FRAGS / 8) {
tunables->lnd_concurrent_sends =
ni->ni_peertxcredits * 2;
} else {
tunables->lnd_concurrent_sends = ni->ni_peertxcredits;
}
}
if (tunables->lnd_concurrent_sends > ni->ni_peertxcredits * 2)
tunables->lnd_concurrent_sends = ni->ni_peertxcredits * 2;
if (tunables->lnd_concurrent_sends < ni->ni_peertxcredits / 2)
tunables->lnd_concurrent_sends = ni->ni_peertxcredits / 2;
if (tunables->lnd_concurrent_sends < ni->ni_peertxcredits) {
CWARN("Concurrent sends %d is lower than message queue size: %d, performance may drop slightly.\n",
tunables->lnd_concurrent_sends, ni->ni_peertxcredits);
}
if (!tunables->lnd_fmr_pool_size)
tunables->lnd_fmr_pool_size = fmr_pool_size;
if (!tunables->lnd_fmr_flush_trigger)
tunables->lnd_fmr_flush_trigger = fmr_flush_trigger;
if (!tunables->lnd_fmr_cache)
tunables->lnd_fmr_cache = fmr_cache;
return 0;
}
void kiblnd_tunables_init(void)
{
default_tunables.lnd_version = 0;
default_tunables.lnd_peercredits_hiw = peer_credits_hiw,
default_tunables.lnd_map_on_demand = map_on_demand;
default_tunables.lnd_concurrent_sends = concurrent_sends;
default_tunables.lnd_fmr_pool_size = fmr_pool_size;
default_tunables.lnd_fmr_flush_trigger = fmr_flush_trigger;
default_tunables.lnd_fmr_cache = fmr_cache;
}
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