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IB/mad: Allow tuning of QP0 and QP1 sizes

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MADs are UD and can be dropped if there are no receives posted, so
allow receive queue size to be set with a module parameter in case the
queue needs to be lengthened.  Send side tuning is done for symmetry
with receive.

Signed-off-by: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Hal Rosenstock 2009-09-07 08:28:48 -07:00 committed by Roland Dreier
parent 6b2eef8fd7
commit b76aabc395
2 changed files with 23 additions and 5 deletions
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25
drivers/infiniband/core/mad.c
View file

@ -2,6 +2,7 @@
* Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved.
* Copyright (c) 2009 HNR Consulting. 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
@ -45,6 +46,14 @@ MODULE_DESCRIPTION("kernel IB MAD API");
MODULE_AUTHOR("Hal Rosenstock");
MODULE_AUTHOR("Sean Hefty");
int mad_sendq_size = IB_MAD_QP_SEND_SIZE;
int mad_recvq_size = IB_MAD_QP_RECV_SIZE;
module_param_named(send_queue_size, mad_sendq_size, int, 0444);
MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests");
module_param_named(recv_queue_size, mad_recvq_size, int, 0444);
MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests");
static struct kmem_cache *ib_mad_cache;
static struct list_head ib_mad_port_list;
@ -2736,8 +2745,8 @@ static int create_mad_qp(struct ib_mad_qp_info *qp_info,
qp_init_attr.send_cq = qp_info->port_priv->cq;
qp_init_attr.recv_cq = qp_info->port_priv->cq;
qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
qp_init_attr.cap.max_send_wr = IB_MAD_QP_SEND_SIZE;
qp_init_attr.cap.max_recv_wr = IB_MAD_QP_RECV_SIZE;
qp_init_attr.cap.max_send_wr = mad_sendq_size;
qp_init_attr.cap.max_recv_wr = mad_recvq_size;
qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG;
qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG;
qp_init_attr.qp_type = qp_type;
@ -2752,8 +2761,8 @@ static int create_mad_qp(struct ib_mad_qp_info *qp_info,
goto error;
}
/* Use minimum queue sizes unless the CQ is resized */
qp_info->send_queue.max_active = IB_MAD_QP_SEND_SIZE;
qp_info->recv_queue.max_active = IB_MAD_QP_RECV_SIZE;
qp_info->send_queue.max_active = mad_sendq_size;
qp_info->recv_queue.max_active = mad_recvq_size;
return 0;
error:
@ -2792,7 +2801,7 @@ static int ib_mad_port_open(struct ib_device *device,
init_mad_qp(port_priv, &port_priv->qp_info[0]);
init_mad_qp(port_priv, &port_priv->qp_info[1]);
cq_size = (IB_MAD_QP_SEND_SIZE + IB_MAD_QP_RECV_SIZE) * 2;
cq_size = (mad_sendq_size + mad_recvq_size) * 2;
port_priv->cq = ib_create_cq(port_priv->device,
ib_mad_thread_completion_handler,
NULL, port_priv, cq_size, 0);
@ -2984,6 +2993,12 @@ static int __init ib_mad_init_module(void)
{
int ret;
mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE);
mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE);
mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE);
mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE);
spin_lock_init(&ib_mad_port_list_lock);
ib_mad_cache = kmem_cache_create("ib_mad",

3
drivers/infiniband/core/mad_priv.h
View file

@ -2,6 +2,7 @@
* Copyright (c) 2004, 2005, Voltaire, Inc. All rights reserved.
* Copyright (c) 2005 Intel Corporation. All rights reserved.
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2009 HNR Consulting. 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
@ -49,6 +50,8 @@
/* QP and CQ parameters */
#define IB_MAD_QP_SEND_SIZE 128
#define IB_MAD_QP_RECV_SIZE 512
#define IB_MAD_QP_MIN_SIZE 64
#define IB_MAD_QP_MAX_SIZE 8192
#define IB_MAD_SEND_REQ_MAX_SG 2
#define IB_MAD_RECV_REQ_MAX_SG 1