ib_sma.c

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/*
 * Copyright (C) 2009 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 <stdio.h>
#include <unistd.h>
#include <byteswap.h>
#include <gpxe/settings.h>
#include <gpxe/infiniband.h>
#include <gpxe/iobuf.h>
#include <gpxe/ib_mi.h>
#include <gpxe/ib_sma.h>

/**
 * @file
 *
 * Infiniband Subnet Management Agent
 *
 */

/**
 * Node information
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @v av                Source address vector
 */
static void ib_sma_node_info ( struct ib_device *ibdev,
                               struct ib_mad_interface *mi,
                               union ib_mad *mad,
                               struct ib_address_vector *av ) {
        struct ib_node_info *node_info = &mad->smp.smp_data.node_info;
        int rc;

        /* Fill in information */
        memset ( node_info, 0, sizeof ( *node_info ) );
        node_info->base_version = IB_MGMT_BASE_VERSION;
        node_info->class_version = IB_SMP_CLASS_VERSION;
        node_info->node_type = IB_NODE_TYPE_HCA;
        node_info->num_ports = ib_get_hca_info ( ibdev, &node_info->sys_guid );
        memcpy ( &node_info->node_guid, &node_info->sys_guid,
                 sizeof ( node_info->node_guid ) );
        memcpy ( &node_info->port_guid, &ibdev->gid.u.half[1],
                 sizeof ( node_info->port_guid ) );
        node_info->partition_cap = htons ( 1 );
        node_info->local_port_num = ibdev->port;

        /* Send GetResponse */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        if ( ( rc = ib_mi_send ( ibdev, mi, mad, av ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not send NodeInfo GetResponse: %s\n",
                       mi, strerror ( rc ) );
                return;
        }
}

/**
 * Node description
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @v av                Source address vector
 */
static void ib_sma_node_desc ( struct ib_device *ibdev,
                               struct ib_mad_interface *mi,
                               union ib_mad *mad,
                               struct ib_address_vector *av ) {
        struct ib_node_desc *node_desc = &mad->smp.smp_data.node_desc;
        struct ib_gid_half guid;
        char hostname[ sizeof ( node_desc->node_string ) ];
        int hostname_len;
        int rc;

        /* Fill in information */
        memset ( node_desc, 0, sizeof ( *node_desc ) );
        ib_get_hca_info ( ibdev, &guid );
        hostname_len = fetch_string_setting ( NULL, &hostname_setting,
                                              hostname, sizeof ( hostname ) );
        snprintf ( node_desc->node_string, sizeof ( node_desc->node_string ),
                   "gPXE %s%s%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x (%s)",
                   hostname, ( ( hostname_len >= 0 ) ? " " : "" ),
                   guid.u.bytes[0], guid.u.bytes[1], guid.u.bytes[2],
                   guid.u.bytes[3], guid.u.bytes[4], guid.u.bytes[5],
                   guid.u.bytes[6], guid.u.bytes[7], ibdev->dev->name );

        /* Send GetResponse */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        if ( ( rc = ib_mi_send ( ibdev, mi, mad, av ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not send NodeDesc GetResponse: %s\n",
                       mi, strerror ( rc ) );
                return;
        }
}

/**
 * GUID information
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @v av                Source address vector
 */
static void ib_sma_guid_info ( struct ib_device *ibdev,
                               struct ib_mad_interface *mi,
                               union ib_mad *mad,
                               struct ib_address_vector *av ) {
        struct ib_guid_info *guid_info = &mad->smp.smp_data.guid_info;
        int rc;

        /* Fill in information */
        memset ( guid_info, 0, sizeof ( *guid_info ) );
        memcpy ( guid_info->guid[0], &ibdev->gid.u.half[1],
                 sizeof ( guid_info->guid[0] ) );

        /* Send GetResponse */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        if ( ( rc = ib_mi_send ( ibdev, mi, mad, av ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not send GuidInfo GetResponse: %s\n",
                       mi, strerror ( rc ) );
                return;
        }
}

/**
 * Set port information
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @ret rc              Return status code
 */
static int ib_sma_set_port_info ( struct ib_device *ibdev,
                                  struct ib_mad_interface *mi,
                                  union ib_mad *mad ) {
        const struct ib_port_info *port_info = &mad->smp.smp_data.port_info;
        unsigned int link_width_enabled;
        unsigned int link_speed_enabled;
        int rc;

        /* Set parameters */
        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 );
        if ( ( link_width_enabled = port_info->link_width_enabled ) )
                ibdev->link_width_enabled = link_width_enabled;
        if ( ( link_speed_enabled =
               ( port_info->link_speed_active__link_speed_enabled & 0xf ) ) )
                ibdev->link_speed_enabled = link_speed_enabled;
        ibdev->sm_sl = ( port_info->neighbour_mtu__mastersm_sl & 0xf );
        DBGC ( mi, "SMA %p set LID %04x SMLID %04x link width %02x speed "
               "%02x\n", mi, ibdev->lid, ibdev->sm_lid,
               ibdev->link_width_enabled, ibdev->link_speed_enabled );

        /* Update parameters on device */
        if ( ( rc = ib_set_port_info ( ibdev, mad ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not set port information: %s\n",
                       mi, strerror ( rc ) );
                return rc;
        }

        return 0;
}

/**
 * Port information
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @v av                Source address vector
 */
static void ib_sma_port_info ( struct ib_device *ibdev,
                               struct ib_mad_interface *mi,
                               union ib_mad *mad,
                               struct ib_address_vector *av ) {
        struct ib_port_info *port_info = &mad->smp.smp_data.port_info;
        int rc;

        /* Set parameters if applicable */
        if ( mad->hdr.method == IB_MGMT_METHOD_SET ) {
                if ( ( rc = ib_sma_set_port_info ( ibdev, mi, mad ) ) != 0 ) {
                        mad->hdr.status =
                              htons ( IB_MGMT_STATUS_UNSUPPORTED_METHOD_ATTR );
                        /* Fall through to generate GetResponse */
                }
        }

        /* Fill in information */
        memset ( port_info, 0, sizeof ( *port_info ) );
        memcpy ( port_info->gid_prefix, &ibdev->gid.u.half[0],
                 sizeof ( port_info->gid_prefix ) );
        port_info->lid = ntohs ( ibdev->lid );
        port_info->mastersm_lid = ntohs ( ibdev->sm_lid );
        port_info->local_port_num = ibdev->port;
        port_info->link_width_enabled = ibdev->link_width_enabled;
        port_info->link_width_supported = ibdev->link_width_supported;
        port_info->link_width_active = ibdev->link_width_active;
        port_info->link_speed_supported__port_state =
                ( ( ibdev->link_speed_supported << 4 ) | ibdev->port_state );
        port_info->port_phys_state__link_down_def_state =
                ( ( IB_PORT_PHYS_STATE_POLLING << 4 ) |
                  IB_PORT_PHYS_STATE_POLLING );
        port_info->link_speed_active__link_speed_enabled =
                ( ( ibdev->link_speed_active << 4 ) |
                  ibdev->link_speed_enabled );
        port_info->neighbour_mtu__mastersm_sl =
                ( ( IB_MTU_2048 << 4 ) | ibdev->sm_sl );
        port_info->vl_cap__init_type = ( IB_VL_0 << 4 );
        port_info->init_type_reply__mtu_cap = IB_MTU_2048;
        port_info->operational_vls__enforcement = ( IB_VL_0 << 4 );
        port_info->guid_cap = 1;

        /* Send GetResponse */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        if ( ( rc = ib_mi_send ( ibdev, mi, mad, av ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not send PortInfo GetResponse: %s\n",
                       mi, strerror ( rc ) );
                return;
        }
}

/**
 * Set partition key table
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @ret rc              Return status code
 */
static int ib_sma_set_pkey_table ( struct ib_device *ibdev,
                                   struct ib_mad_interface *mi,
                                   union ib_mad *mad ) {
        struct ib_pkey_table *pkey_table = &mad->smp.smp_data.pkey_table;
        int rc;

        /* Set parameters */
        ibdev->pkey = ntohs ( pkey_table->pkey[0] );
        DBGC ( mi, "SMA %p set pkey %04x\n", mi, ibdev->pkey );

        /* Update parameters on device */
        if ( ( rc = ib_set_pkey_table ( ibdev, mad ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not set pkey table: %s\n",
                       mi, strerror ( rc ) );
                return rc;
        }

        return 0;
}

/**
 * Partition key table
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @v mad               Received MAD
 * @v av                Source address vector
 */
static void ib_sma_pkey_table ( struct ib_device *ibdev,
                                struct ib_mad_interface *mi,
                                union ib_mad *mad,
                                struct ib_address_vector *av ) {
        struct ib_pkey_table *pkey_table = &mad->smp.smp_data.pkey_table;
        int rc;

        /* Set parameters, if applicable */
        if ( mad->hdr.method == IB_MGMT_METHOD_SET ) {
                if ( ( rc = ib_sma_set_pkey_table ( ibdev, mi, mad ) ) != 0 ) {
                        mad->hdr.status =
                              htons ( IB_MGMT_STATUS_UNSUPPORTED_METHOD_ATTR );
                        /* Fall through to generate GetResponse */
                }
        }

        /* Fill in information */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        memset ( pkey_table, 0, sizeof ( *pkey_table ) );
        pkey_table->pkey[0] = htons ( ibdev->pkey );

        /* Send GetResponse */
        mad->hdr.method = IB_MGMT_METHOD_GET_RESP;
        if ( ( rc = ib_mi_send ( ibdev, mi, mad, av ) ) != 0 ) {
                DBGC ( mi, "SMA %p could not send PKeyTable GetResponse: %s\n",
                       mi, strerror ( rc ) );
                return;
        }
}

/** Subnet management agent */
struct ib_mad_agent ib_sma_agent[] __ib_mad_agent = {
        {
                .mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED,
                .class_version = IB_SMP_CLASS_VERSION,
                .attr_id = htons ( IB_SMP_ATTR_NODE_INFO ),
                .handle = ib_sma_node_info,
        },
        {
                .mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED,
                .class_version = IB_SMP_CLASS_VERSION,
                .attr_id = htons ( IB_SMP_ATTR_NODE_DESC ),
                .handle = ib_sma_node_desc,
        },
        {
                .mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED,
                .class_version = IB_SMP_CLASS_VERSION,
                .attr_id = htons ( IB_SMP_ATTR_GUID_INFO ),
                .handle = ib_sma_guid_info,
        },
        {
                .mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED,
                .class_version = IB_SMP_CLASS_VERSION,
                .attr_id = htons ( IB_SMP_ATTR_PORT_INFO ),
                .handle = ib_sma_port_info,
        },
        {
                .mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED,
                .class_version = IB_SMP_CLASS_VERSION,
                .attr_id = htons ( IB_SMP_ATTR_PKEY_TABLE ),
                .handle = ib_sma_pkey_table,
        },
};

/**
 * Create subnet management agent and interface
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 * @ret rc              Return status code
 */
int ib_create_sma ( struct ib_device *ibdev, struct ib_mad_interface *mi ) {

        /* Nothing to do */
        DBGC ( ibdev, "IBDEV %p SMA using SMI %p\n", ibdev, mi );

        return 0;
}

/**
 * Destroy subnet management agent and interface
 *
 * @v ibdev             Infiniband device
 * @v mi                Management interface
 */
void ib_destroy_sma ( struct ib_device *ibdev __unused,
                      struct ib_mad_interface *mi __unused ) {
        /* Nothing to do */
}