167 lines
4.7 KiB
C
167 lines
4.7 KiB
C
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/*
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* Copyright (C) 2008 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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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <byteswap.h>
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#include <gpxe/infiniband.h>
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#include <gpxe/ib_smc.h>
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/**
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* @file
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*
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* Infiniband Subnet Management Client
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*
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*/
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/**
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* Get port information
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*
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* @v ibdev Infiniband device
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* @v local_mad Method for issuing local MADs
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* @v mad Management datagram to fill in
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* @ret rc Return status code
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*/
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static int ib_smc_get_port_info ( struct ib_device *ibdev,
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ib_local_mad_t local_mad,
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union ib_mad *mad ) {
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int rc;
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/* Construct MAD */
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memset ( mad, 0, sizeof ( *mad ) );
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mad->hdr.base_version = IB_MGMT_BASE_VERSION;
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mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
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mad->hdr.class_version = 1;
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mad->hdr.method = IB_MGMT_METHOD_GET;
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mad->hdr.attr_id = htons ( IB_SMP_ATTR_PORT_INFO );
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mad->hdr.attr_mod = htonl ( ibdev->port );
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if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
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DBGC ( ibdev, "IBDEV %p could not get port info: %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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* Get GUID information
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*
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* @v ibdev Infiniband device
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* @v local_mad Method for issuing local MADs
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* @v mad Management datagram to fill in
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* @ret rc Return status code
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*/
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static int ib_smc_get_guid_info ( struct ib_device *ibdev,
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ib_local_mad_t local_mad,
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union ib_mad *mad ) {
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int rc;
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/* Construct MAD */
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memset ( mad, 0, sizeof ( *mad ) );
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mad->hdr.base_version = IB_MGMT_BASE_VERSION;
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mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
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mad->hdr.class_version = 1;
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mad->hdr.method = IB_MGMT_METHOD_GET;
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mad->hdr.attr_id = htons ( IB_SMP_ATTR_GUID_INFO );
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if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
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DBGC ( ibdev, "IBDEV %p could not get GUID info: %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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* Get partition key table
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*
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* @v ibdev Infiniband device
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* @v local_mad Method for issuing local MADs
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* @v mad Management datagram to fill in
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* @ret rc Return status code
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*/
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static int ib_smc_get_pkey_table ( struct ib_device *ibdev,
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ib_local_mad_t local_mad,
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union ib_mad *mad ) {
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int rc;
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/* Construct MAD */
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memset ( mad, 0, sizeof ( *mad ) );
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mad->hdr.base_version = IB_MGMT_BASE_VERSION;
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mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
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mad->hdr.class_version = 1;
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mad->hdr.method = IB_MGMT_METHOD_GET;
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mad->hdr.attr_id = htons ( IB_SMP_ATTR_PKEY_TABLE );
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if ( ( rc = local_mad ( ibdev, mad ) ) != 0 ) {
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DBGC ( ibdev, "IBDEV %p could not get pkey table: %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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* Get MAD parameters
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*
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* @v ibdev Infiniband device
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* @v local_mad Method for issuing local MADs
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* @ret rc Return status code
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*/
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int ib_smc_update ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
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union ib_mad mad;
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union ib_smp_data *smp = &mad.smp.smp_data;
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int rc;
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/* Port info gives us the link state, the first half of the
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* port GID and the SM LID.
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*/
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if ( ( rc = ib_smc_get_port_info ( ibdev, local_mad, &mad ) ) != 0 )
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return rc;
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ibdev->port_state =
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( smp->port_info.link_speed_supported__port_state & 0x0f );
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memcpy ( &ibdev->gid.u.half[0], smp->port_info.gid_prefix,
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sizeof ( ibdev->gid.u.half[0] ) );
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ibdev->lid = ntohs ( smp->port_info.lid );
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ibdev->sm_lid = ntohs ( smp->port_info.mastersm_lid );
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ibdev->sm_sl = ( smp->port_info.neighbour_mtu__mastersm_sl & 0xf );
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/* GUID info gives us the second half of the port GID */
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if ( ( rc = ib_smc_get_guid_info ( ibdev, local_mad, &mad ) ) != 0 )
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return rc;
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memcpy ( &ibdev->gid.u.half[1], smp->guid_info.guid[0],
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sizeof ( ibdev->gid.u.half[1] ) );
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/* Get partition key */
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if ( ( rc = ib_smc_get_pkey_table ( ibdev, local_mad, &mad ) ) != 0 )
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return rc;
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ibdev->pkey = ntohs ( smp->pkey_table.pkey[0] );
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DBGC ( ibdev, "IBDEV %p port GID is %08lx:%08lx:%08lx:%08lx\n", ibdev,
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htonl ( ibdev->gid.u.dwords[0] ),
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htonl ( ibdev->gid.u.dwords[1] ),
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htonl ( ibdev->gid.u.dwords[2] ),
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htonl ( ibdev->gid.u.dwords[3] ) );
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return 0;
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}
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