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