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-rw-r--r--gpxe/src/net/infiniband/ib_smc.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/gpxe/src/net/infiniband/ib_smc.c b/gpxe/src/net/infiniband/ib_smc.c
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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., 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;
+ 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;
+
+ /* 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.u.half[0], port_info->gid_prefix,
+ sizeof ( ibdev->gid.u.half[0] ) );
+ 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.u.half[1], 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 ( 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;
+}