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/*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <byteswap.h>
#include <ipxe/infiniband.h>
#include <ipxe/ib_smc.h>
/**
* @file
*
* Infiniband Subnet Management Client
*
*/
/**
* Issue local MAD
*
* @v ibdev Infiniband device
* @v attr_id Attribute ID, in network byte order
* @v attr_mod Attribute modifier, in network byte order
* @v local_mad Method for issuing local MADs
* @v mad Management datagram to fill in
* @ret rc Return status code
*/
static int ib_smc_mad ( struct ib_device *ibdev, uint16_t attr_id,
uint32_t attr_mod, 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 = attr_id;
mad->hdr.attr_mod = attr_mod;
/* Issue MAD */
if ( ( rc = local_mad ( ibdev, mad ) ) != 0 )
return rc;
return 0;
}
/**
* Get node 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_node_info ( struct ib_device *ibdev,
ib_local_mad_t local_mad,
union ib_mad *mad ) {
int rc;
/* Issue MAD */
if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_NODE_INFO ), 0,
local_mad, mad ) ) != 0 ) {
DBGC ( ibdev, "IBDEV %p could not get node info: %s\n",
ibdev, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* 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;
/* Issue MAD */
if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PORT_INFO ),
htonl ( ibdev->port ), local_mad, 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;
/* Issue MAD */
if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_GUID_INFO ), 0,
local_mad, 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;
/* Issue MAD */
if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PKEY_TABLE ), 0,
local_mad, mad ) ) != 0 ) {
DBGC ( ibdev, "IBDEV %p could not get pkey table: %s\n",
ibdev, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Get Infiniband parameters using SMC
*
* @v ibdev Infiniband device
* @v local_mad Method for issuing local MADs
* @ret rc Return status code
*/
static int ib_smc_get ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
union ib_mad mad;
struct ib_node_info *node_info = &mad.smp.smp_data.node_info;
struct ib_port_info *port_info = &mad.smp.smp_data.port_info;
struct ib_guid_info *guid_info = &mad.smp.smp_data.guid_info;
struct ib_pkey_table *pkey_table = &mad.smp.smp_data.pkey_table;
int rc;
/* Node info gives us the node GUID */
if ( ( rc = ib_smc_get_node_info ( ibdev, local_mad, &mad ) ) != 0 )
return rc;
memcpy ( &ibdev->node_guid, &node_info->node_guid,
sizeof ( ibdev->node_guid ) );
/* 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;
memcpy ( &ibdev->gid.s.prefix, port_info->gid_prefix,
sizeof ( ibdev->gid.s.prefix ) );
ibdev->lid = ntohs ( port_info->lid );
ibdev->sm_lid = ntohs ( port_info->mastersm_lid );
ibdev->link_width_enabled = port_info->link_width_enabled;
ibdev->link_width_supported = port_info->link_width_supported;
ibdev->link_width_active = port_info->link_width_active;
ibdev->link_speed_supported =
( port_info->link_speed_supported__port_state >> 4 );
ibdev->port_state =
( port_info->link_speed_supported__port_state & 0xf );
ibdev->link_speed_active =
( port_info->link_speed_active__link_speed_enabled >> 4 );
ibdev->link_speed_enabled =
( port_info->link_speed_active__link_speed_enabled & 0xf );
ibdev->sm_sl = ( 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.s.guid, guid_info->guid[0],
sizeof ( ibdev->gid.s.guid ) );
/* Get partition key */
if ( ( rc = ib_smc_get_pkey_table ( ibdev, local_mad, &mad ) ) != 0 )
return rc;
ibdev->pkey = ntohs ( pkey_table->pkey[0] );
DBGC ( ibdev, "IBDEV %p port GID is " IB_GID_FMT "\n",
ibdev, IB_GID_ARGS ( &ibdev->gid ) );
return 0;
}
/**
* Initialise Infiniband parameters using SMC
*
* @v ibdev Infiniband device
* @v local_mad Method for issuing local MADs
* @ret rc Return status code
*/
int ib_smc_init ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
int rc;
/* Get MAD parameters */
if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
return rc;
return 0;
}
/**
* Update Infiniband parameters using SMC
*
* @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 ) {
int rc;
/* Get MAD parameters */
if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
return rc;
/* Notify Infiniband core of potential link state change */
ib_link_state_changed ( ibdev );
return 0;
}
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