/*
* 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 gma General management agent
* @v gid Multicast GID
* @v join Join (rather than leave) group
* @ret rc Return status code
*/
static int ib_mc_member_request ( struct ib_gma *gma, 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, &gma->ibdev->gid,
sizeof ( sa->sa_data.mc_member_record.port_gid ) );
/* Issue multicast membership record request */
if ( ( rc = ib_gma_request ( gma, &mad, NULL, join ) ) != 0 ) {
DBGC ( gma, "GMA %p could not join group: %s\n",
gma, 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 ) {
struct ib_gma *gma = ibdev->gma;
int rc;
DBGC ( gma, "GMA %p QPN %lx joining %08x:%08x:%08x:%08x\n",
gma, 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 ( gma, "GMA %p could not attach: %s\n",
gma, strerror ( rc ) );
goto err_mcast_attach;
}
/* Initiate multicast membership join */
if ( ( rc = ib_mc_member_request ( gma, 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 ) {
struct ib_gma *gma = ibdev->gma;
DBGC ( gma, "GMA %p QPN %lx leaving %08x:%08x:%08x:%08x\n",
gma, 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 ( gma, gid, 0 );
}
/**
* Handle multicast membership record join response
*
* @v gma General management agent
* @v mad MAD
*/
static void ib_handle_mc_member_join ( struct ib_gma *gma,
union ib_mad *mad ) {
struct ib_device *ibdev = gma->ibdev;
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 ( gma, "GMA %p join failed with status %04x\n",
gma, ntohs ( mad->hdr.status ) );
return;
}
/* 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 ( gma, "GMA %p has no QP to join %08x:%08x:%08x:%08x\n",
gma, ntohl ( gid->u.dwords[0] ),
ntohl ( gid->u.dwords[1] ),
ntohl ( gid->u.dwords[2] ),
ntohl ( gid->u.dwords[3] ) );
return;
}
DBGC ( gma, "GMA %p QPN %lx joined %08x:%08x:%08x:%08x qkey %lx\n",
gma, 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 ( gma, "GMA %p QPN %lx could not modify qkey: %s\n",
gma, qp->qpn, strerror ( rc ) );
return;
}
}
/**
* Handle multicast membership record leave response
*
* @v gma General management agent
* @v mad MAD
*/
static void ib_handle_mc_member_leave ( struct ib_gma *gma,
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 ( gma, "GMA %p leave failed with status %04x\n",
gma, ntohs ( mad->hdr.status ) );
return;
}
/* Extract MAD parameters */
gid = &mc_member_record->mgid;
DBGC ( gma, "GMA %p left %08x:%08x:%08x:%08x\n", gma,
ntohl ( gid->u.dwords[0] ), ntohl ( gid->u.dwords[1] ),
ntohl ( gid->u.dwords[2] ), ntohl ( gid->u.dwords[3] ) );
}
/** Multicast membership record response handler */
struct ib_gma_handler ib_mc_member_record_handlers[] __ib_gma_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,
},
};
