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