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[infiniband] Provide a general mechanism for multicast group joins

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Generalise out the multicast group membership record code from IPoIB.
This commit is contained in:
Michael Brown 2009-07-07 16:07:31 +01:00
parent 3c77fe73a5
commit 0fbf2f6bda
6 changed files with 274 additions and 129 deletions
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142
src/drivers/net/ipoib.c
View File

@ -30,6 +30,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <gpxe/infiniband.h>
#include <gpxe/ib_qset.h>
#include <gpxe/ib_pathrec.h>
#include <gpxe/ib_mcast.h>
#include <gpxe/ipoib.h>
/** @file
@ -67,20 +68,14 @@ struct ipoib_device {
struct ib_queue_set meta;
/** Broadcast MAC */
struct ipoib_mac broadcast;
/** Attached to multicast group
/** Joined to multicast group
*
* This flag indicates whether or not we have attached our
* data queue pair to the broadcast multicast GID.
* This flag indicates whether or not we have initiated the
* join to the IPv4 multicast group.
*/
int broadcast_attached;
int broadcast_joined;
};
/** TID half used to identify multicast member record replies */
#define IPOIB_TID_MC_MEMBER_REC 0x22222222UL
/** IPoIB metadata TID */
static uint32_t ipoib_meta_tid = 0;
/** Broadcast IPoIB address */
static struct ipoib_mac ipoib_broadcast = {
.qpn = htonl ( IB_QPN_BROADCAST ),
@ -332,67 +327,6 @@ struct net_device * alloc_ipoibdev ( size_t priv_size ) {
****************************************************************************
*/
/**
* Transmit multicast group membership request
*
* @v ipoib IPoIB device
* @v gid Multicast GID
* @v join Join (rather than leave) group
* @ret rc Return status code
*/
static int ipoib_mc_member_record ( struct ipoib_device *ipoib,
struct ib_gid *gid, int join ) {
struct ib_device *ibdev = ipoib->ibdev;
struct io_buffer *iobuf;
struct ib_mad_sa *sa;
struct ib_address_vector av;
int rc;
/* Allocate I/O buffer */
iobuf = alloc_iob ( sizeof ( *sa ) );
if ( ! iobuf )
return -ENOMEM;
iob_put ( iobuf, sizeof ( *sa ) );
sa = iobuf->data;
memset ( sa, 0, sizeof ( *sa ) );
/* Construct path record request */
sa->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
sa->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
sa->mad_hdr.class_version = 2;
sa->mad_hdr.method =
( join ? IB_MGMT_METHOD_SET : IB_MGMT_METHOD_DELETE );
sa->mad_hdr.attr_id = htons ( IB_SA_ATTR_MC_MEMBER_REC );
sa->mad_hdr.tid[0] = IPOIB_TID_MC_MEMBER_REC;
sa->mad_hdr.tid[1] = ipoib_meta_tid++;
sa->sa_hdr.comp_mask[1] =
htonl ( IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
IB_SA_MCMEMBER_REC_JOIN_STATE );
sa->sa_data.mc_member_record.scope__join_state = 1;
memcpy ( &sa->sa_data.mc_member_record.mgid, gid,
sizeof ( sa->sa_data.mc_member_record.mgid ) );
memcpy ( &sa->sa_data.mc_member_record.port_gid, &ibdev->gid,
sizeof ( sa->sa_data.mc_member_record.port_gid ) );
/* Construct address vector */
memset ( &av, 0, sizeof ( av ) );
av.lid = ibdev->sm_lid;
av.sl = ibdev->sm_sl;
av.qpn = IB_QPN_GMA;
av.qkey = IB_QKEY_GMA;
/* Post send request */
if ( ( rc = ib_post_send ( ibdev, ipoib->meta.qp, &av,
iobuf ) ) != 0 ) {
DBGC ( ipoib, "IPoIB %p could not send get path record: %s\n",
ipoib, strerror ( rc ) );
free_iob ( iobuf );
return rc;
}
return 0;
}
/**
* Transmit packet via IPoIB network device
*
@ -529,33 +463,6 @@ static void ipoib_meta_complete_send ( struct ib_device *ibdev __unused,
free_iob ( iobuf );
}
/**
* Handle received IPoIB multicast membership record
*
* @v ipoib IPoIB device
* @v mc_member_record Multicast membership record
*/
static void ipoib_recv_mc_member_record ( struct ipoib_device *ipoib,
struct ib_mc_member_record *mc_member_record ) {
unsigned long data_qkey;
int joined;
int rc;
/* Record parameters */
joined = ( mc_member_record->scope__join_state & 0x0f );
data_qkey = ntohl ( mc_member_record->qkey );
DBGC ( ipoib, "IPoIB %p %s broadcast group: qkey %lx\n",
ipoib, ( joined ? "joined" : "left" ), data_qkey );
/* Update data queue pair qkey */
if ( ( rc = ib_modify_qp ( ipoib->ibdev, ipoib->data.qp,
IB_MODIFY_QKEY, data_qkey ) ) != 0 ){
DBGC ( ipoib, "IPoIB %p could not update data qkey: %s\n",
ipoib, strerror ( rc ) );
return;
}
}
/**
* Handle IPoIB metadata receive completion
*
@ -594,10 +501,6 @@ ipoib_meta_complete_recv ( struct ib_device *ibdev __unused,
}
switch ( sa->mad_hdr.tid[0] ) {
case IPOIB_TID_MC_MEMBER_REC:
ipoib_recv_mc_member_record ( ipoib,
&sa->sa_data.mc_member_record );
break;
default:
DBGC ( ipoib, "IPoIB %p unwanted response:\n",
ipoib );
@ -647,31 +550,13 @@ static void ipoib_irq ( struct net_device *netdev __unused,
static int ipoib_join_broadcast_group ( struct ipoib_device *ipoib ) {
int rc;
/* Sanity check */
if ( ! ipoib->data.qp )
return 0;
/* Attach data queue to broadcast multicast GID */
assert ( ipoib->broadcast_attached == 0 );
if ( ( rc = ib_mcast_attach ( ipoib->ibdev, ipoib->data.qp,
&ipoib->broadcast.gid ) ) != 0 ){
DBGC ( ipoib, "IPoIB %p could not attach to broadcast GID: "
"%s\n", ipoib, strerror ( rc ) );
return rc;
}
ipoib->broadcast_attached = 1;
/* Initiate broadcast group join */
if ( ( rc = ipoib_mc_member_record ( ipoib, &ipoib->broadcast.gid,
1 ) ) != 0 ) {
DBGC ( ipoib, "IPoIB %p could not send broadcast join: %s\n",
if ( ( rc = ib_mcast_join ( ipoib->ibdev, ipoib->data.qp,
&ipoib->broadcast.gid ) ) != 0 ) {
DBGC ( ipoib, "IPoIB %p could not join broadcast group: %s\n",
ipoib, strerror ( rc ) );
return rc;
}
/* We will set link up on the network device when we receive
* the broadcast join response.
*/
ipoib->broadcast_joined = 1;
return 0;
}
@ -684,11 +569,10 @@ static int ipoib_join_broadcast_group ( struct ipoib_device *ipoib ) {
static void ipoib_leave_broadcast_group ( struct ipoib_device *ipoib ) {
/* Detach data queue from broadcast multicast GID */
if ( ipoib->broadcast_attached ) {
assert ( ipoib->data.qp != NULL );
ib_mcast_detach ( ipoib->ibdev, ipoib->data.qp,
&ipoib->broadcast.gid );
ipoib->broadcast_attached = 0;
if ( ipoib->broadcast_joined ) {
ib_mcast_leave ( ipoib->ibdev, ipoib->data.qp,
&ipoib->broadcast.gid );
ipoib->broadcast_joined = 0;
}
}

1
src/include/gpxe/errfile.h
View File

@ -146,6 +146,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define ERRFILE_ib_qset ( ERRFILE_NET | 0x001a0000 )
#define ERRFILE_ib_gma ( ERRFILE_NET | 0x001b0000 )
#define ERRFILE_ib_pathrec ( ERRFILE_NET | 0x001c0000 )
#define ERRFILE_ib_mcast ( ERRFILE_NET | 0x001d0000 )
#define ERRFILE_image ( ERRFILE_IMAGE | 0x00000000 )
#define ERRFILE_elf ( ERRFILE_IMAGE | 0x00010000 )

2
src/include/gpxe/ib_mad.h
View File

@ -203,6 +203,8 @@ struct ib_smp_class_specific {
#define IB_SA_CLASS_VERSION 2
#define IB_SA_METHOD_DELETE_RESP 0x95
struct ib_rmpp_hdr {
uint32_t raw[3];
} __attribute__ (( packed ));

19
src/include/gpxe/ib_mcast.h Normal file
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@ -0,0 +1,19 @@
#ifndef _GPXE_IB_MCAST_H
#define _GPXE_IB_MCAST_H
/** @file
*
* Infiniband multicast groups
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <gpxe/infiniband.h>
extern int ib_mcast_join ( struct ib_device *ibdev, struct ib_queue_pair *qp,
struct ib_gid *gid );
extern void ib_mcast_leave ( struct ib_device *ibdev, struct ib_queue_pair *qp,
struct ib_gid *gid );
#endif /* _GPXE_IB_MCAST_H */

4
src/net/infiniband.c
View File

@ -554,6 +554,10 @@ void ib_close ( struct ib_device *ibdev ) {
* @v qp Queue pair
* @v gid Multicast GID
* @ret rc Return status code
*
* Note that this function handles only the local device's attachment
* to the multicast GID; it does not issue the relevant MADs to join
* the multicast group on the subnet.
*/
int ib_mcast_attach ( struct ib_device *ibdev, struct ib_queue_pair *qp,
struct ib_gid *gid ) {

235
src/net/infiniband/ib_mcast.c Normal file
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@ -0,0 +1,235 @@
/*
* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <string.h>
#include <byteswap.h>
#include <errno.h>
#include <gpxe/list.h>
#include <gpxe/infiniband.h>
#include <gpxe/ib_gma.h>
#include <gpxe/ib_mcast.h>
/** @file
*
* Infiniband multicast groups
*
*/
/**
* Transmit multicast group membership request
*
* @v ibdev Infiniband device
* @v gid Multicast GID
* @v join Join (rather than leave) group
* @ret rc Return status code
*/
static int ib_mc_member_request ( struct ib_device *ibdev, struct ib_gid *gid,
int join ) {
union ib_mad mad;
struct ib_mad_sa *sa = &mad.sa;
int rc;
/* Construct multicast membership record request */
memset ( sa, 0, sizeof ( *sa ) );
sa->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
sa->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
sa->mad_hdr.class_version = IB_SA_CLASS_VERSION;
sa->mad_hdr.method =
( join ? IB_MGMT_METHOD_SET : IB_MGMT_METHOD_DELETE );
sa->mad_hdr.attr_id = htons ( IB_SA_ATTR_MC_MEMBER_REC );
sa->sa_hdr.comp_mask[1] =
htonl ( IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
IB_SA_MCMEMBER_REC_JOIN_STATE );
sa->sa_data.mc_member_record.scope__join_state = 1;
memcpy ( &sa->sa_data.mc_member_record.mgid, gid,
sizeof ( sa->sa_data.mc_member_record.mgid ) );
memcpy ( &sa->sa_data.mc_member_record.port_gid, &ibdev->gid,
sizeof ( sa->sa_data.mc_member_record.port_gid ) );
/* Issue multicast membership record request */
if ( ( rc = ib_gma_request ( &ibdev->gma, &mad, NULL,
join ) ) != 0 ) {
DBGC ( ibdev, "IBDEV %p could not join group: %s\n",
ibdev, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Join multicast group
*
* @v ibdev Infiniband device
* @v qp Queue pair
* @v gid Multicast GID
* @ret rc Return status code
*/
int ib_mcast_join ( struct ib_device *ibdev, struct ib_queue_pair *qp,
struct ib_gid *gid ) {
int rc;
DBGC ( ibdev, "IBDEV %p QPN %lx joining %08x:%08x:%08x:%08x\n",
ibdev, qp->qpn, ntohl ( gid->u.dwords[0] ),
ntohl ( gid->u.dwords[1] ), ntohl ( gid->u.dwords[2] ),
ntohl ( gid->u.dwords[3] ) );
/* Attach queue pair to multicast GID */
if ( ( rc = ib_mcast_attach ( ibdev, qp, gid ) ) != 0 ) {
DBGC ( ibdev, "IBDEV %p could not attach: %s\n",
ibdev, strerror ( rc ) );
goto err_mcast_attach;
}
/* Initiate multicast membership join */
if ( ( rc = ib_mc_member_request ( ibdev, gid, 1 ) ) != 0 )
goto err_mc_member_record;
return 0;
err_mc_member_record:
ib_mcast_detach ( ibdev, qp, gid );
err_mcast_attach:
return rc;
}
/**
* Leave multicast group
*
* @v ibdev Infiniband device
* @v qp Queue pair
* @v gid Multicast GID
*/
void ib_mcast_leave ( struct ib_device *ibdev, struct ib_queue_pair *qp,
struct ib_gid *gid ) {
DBGC ( ibdev, "IBDEV %p QPN %lx leaving %08x:%08x:%08x:%08x\n",
ibdev, qp->qpn, ntohl ( gid->u.dwords[0] ),
ntohl ( gid->u.dwords[1] ), ntohl ( gid->u.dwords[2] ),
ntohl ( gid->u.dwords[3] ) );
/* Detach queue pair from multicast GID */
ib_mcast_detach ( ibdev, qp, gid );
/* Initiate multicast membership leave */
ib_mc_member_request ( ibdev, gid, 0 );
}
/**
* Handle multicast membership record join response
*
* @v ibdev Infiniband device
* @v mad MAD
* @ret rc Return status code
*/
static int ib_handle_mc_member_join ( struct ib_device *ibdev,
union ib_mad *mad ) {
struct ib_mc_member_record *mc_member_record =
&mad->sa.sa_data.mc_member_record;
struct ib_queue_pair *qp;
struct ib_gid *gid;
unsigned long qkey;
int rc;
/* Ignore if not a success */
if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
DBGC ( ibdev, "IBDEV %p join failed with status %04x\n",
ibdev, ntohs ( mad->hdr.status ) );
return -EINVAL;
}
/* Extract MAD parameters */
gid = &mc_member_record->mgid;
qkey = ntohl ( mc_member_record->qkey );
/* Locate matching queue pair */
qp = ib_find_qp_mgid ( ibdev, gid );
if ( ! qp ) {
DBGC ( ibdev, "IBDEV %p has no QP to join "
"%08x:%08x:%08x:%08x\n", ibdev,
ntohl ( gid->u.dwords[0] ),
ntohl ( gid->u.dwords[1] ),
ntohl ( gid->u.dwords[2] ),
ntohl ( gid->u.dwords[3] ) );
return -ENOENT;
}
DBGC ( ibdev, "IBDEV %p QPN %lx joined %08x:%08x:%08x:%08x qkey "
"%lx\n", ibdev, qp->qpn,
ntohl ( gid->u.dwords[0] ), ntohl ( gid->u.dwords[1] ),
ntohl ( gid->u.dwords[2] ), ntohl ( gid->u.dwords[3] ),
qkey );
/* Set queue key */
if ( ( rc = ib_modify_qp ( ibdev, qp, IB_MODIFY_QKEY, qkey ) ) != 0 ) {
DBGC ( ibdev, "IBDEV %p QPN %lx could not modify qkey: %s\n",
ibdev, qp->qpn, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Handle multicast membership record leave response
*
* @v ibdev Infiniband device
* @v mad MAD
* @ret rc Return status code
*/
static int ib_handle_mc_member_leave ( struct ib_device *ibdev,
union ib_mad *mad ) {
struct ib_mc_member_record *mc_member_record =
&mad->sa.sa_data.mc_member_record;
struct ib_gid *gid;
/* Ignore if not a success */
if ( mad->hdr.status != htons ( IB_MGMT_STATUS_OK ) ) {
DBGC ( ibdev, "IBDEV %p leave failed with status %04x\n",
ibdev, ntohs ( mad->hdr.status ) );
return -EINVAL;
}
/* Extract MAD parameters */
gid = &mc_member_record->mgid;
DBGC ( ibdev, "IBDEV %p left %08x:%08x:%08x:%08x\n", ibdev,
ntohl ( gid->u.dwords[0] ), ntohl ( gid->u.dwords[1] ),
ntohl ( gid->u.dwords[2] ), ntohl ( gid->u.dwords[3] ) );
return 0;
}
/** Multicast membership record response handler */
struct ib_mad_handler ib_mc_member_record_handlers[] __ib_mad_handler = {
{
.mgmt_class = IB_MGMT_CLASS_SUBN_ADM,
.class_version = IB_SA_CLASS_VERSION,
.method = IB_MGMT_METHOD_GET_RESP,
.attr_id = htons ( IB_SA_ATTR_MC_MEMBER_REC ),
.handle = ib_handle_mc_member_join,
},
{
.mgmt_class = IB_MGMT_CLASS_SUBN_ADM,
.class_version = IB_SA_CLASS_VERSION,
.method = IB_SA_METHOD_DELETE_RESP,
.attr_id = htons ( IB_SA_ATTR_MC_MEMBER_REC ),
.handle = ib_handle_mc_member_leave,
},
};