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Annotation of qemu/roms/ipxe/src/net/infiniband/ib_smc.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (C) 2008 Michael Brown <[email protected]>.
        !             3:  *
        !             4:  * This program is free software; you can redistribute it and/or
        !             5:  * modify it under the terms of the GNU General Public License as
        !             6:  * published by the Free Software Foundation; either version 2 of the
        !             7:  * License, or any later version.
        !             8:  *
        !             9:  * This program is distributed in the hope that it will be useful, but
        !            10:  * WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            12:  * General Public License for more details.
        !            13:  *
        !            14:  * You should have received a copy of the GNU General Public License
        !            15:  * along with this program; if not, write to the Free Software
        !            16:  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            17:  */
        !            18: 
        !            19: FILE_LICENCE ( GPL2_OR_LATER );
        !            20: 
        !            21: #include <stdint.h>
        !            22: #include <stdlib.h>
        !            23: #include <string.h>
        !            24: #include <errno.h>
        !            25: #include <unistd.h>
        !            26: #include <byteswap.h>
        !            27: #include <ipxe/infiniband.h>
        !            28: #include <ipxe/ib_smc.h>
        !            29: 
        !            30: /**
        !            31:  * @file
        !            32:  *
        !            33:  * Infiniband Subnet Management Client
        !            34:  *
        !            35:  */
        !            36: 
        !            37: /**
        !            38:  * Issue local MAD
        !            39:  *
        !            40:  * @v ibdev            Infiniband device
        !            41:  * @v attr_id          Attribute ID, in network byte order
        !            42:  * @v attr_mod         Attribute modifier, in network byte order
        !            43:  * @v local_mad                Method for issuing local MADs
        !            44:  * @v mad              Management datagram to fill in
        !            45:  * @ret rc             Return status code
        !            46:  */
        !            47: static int ib_smc_mad ( struct ib_device *ibdev, uint16_t attr_id,
        !            48:                        uint32_t attr_mod, ib_local_mad_t local_mad,
        !            49:                        union ib_mad *mad ) {
        !            50:        int rc;
        !            51: 
        !            52:        /* Construct MAD */
        !            53:        memset ( mad, 0, sizeof ( *mad ) );
        !            54:        mad->hdr.base_version = IB_MGMT_BASE_VERSION;
        !            55:        mad->hdr.mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED;
        !            56:        mad->hdr.class_version = 1;
        !            57:        mad->hdr.method = IB_MGMT_METHOD_GET;
        !            58:        mad->hdr.attr_id = attr_id;
        !            59:        mad->hdr.attr_mod = attr_mod;
        !            60: 
        !            61:        /* Issue MAD */
        !            62:        if ( ( rc = local_mad ( ibdev, mad ) ) != 0 )
        !            63:                return rc;
        !            64: 
        !            65:        return 0;
        !            66: }
        !            67: 
        !            68: /**
        !            69:  * Get node information
        !            70:  *
        !            71:  * @v ibdev            Infiniband device
        !            72:  * @v local_mad                Method for issuing local MADs
        !            73:  * @v mad              Management datagram to fill in
        !            74:  * @ret rc             Return status code
        !            75:  */
        !            76: static int ib_smc_get_node_info ( struct ib_device *ibdev,
        !            77:                                  ib_local_mad_t local_mad,
        !            78:                                  union ib_mad *mad ) {
        !            79:        int rc;
        !            80: 
        !            81:        /* Issue MAD */
        !            82:        if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_NODE_INFO ), 0,
        !            83:                                 local_mad, mad ) ) != 0 ) {
        !            84:                DBGC ( ibdev, "IBDEV %p could not get node info: %s\n",
        !            85:                       ibdev, strerror ( rc ) );
        !            86:                return rc;
        !            87:        }
        !            88:        return 0;
        !            89: }
        !            90: 
        !            91: /**
        !            92:  * Get port information
        !            93:  *
        !            94:  * @v ibdev            Infiniband device
        !            95:  * @v local_mad                Method for issuing local MADs
        !            96:  * @v mad              Management datagram to fill in
        !            97:  * @ret rc             Return status code
        !            98:  */
        !            99: static int ib_smc_get_port_info ( struct ib_device *ibdev,
        !           100:                                  ib_local_mad_t local_mad,
        !           101:                                  union ib_mad *mad ) {
        !           102:        int rc;
        !           103: 
        !           104:        /* Issue MAD */
        !           105:        if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PORT_INFO ),
        !           106:                                 htonl ( ibdev->port ), local_mad, mad )) !=0){
        !           107:                DBGC ( ibdev, "IBDEV %p could not get port info: %s\n",
        !           108:                       ibdev, strerror ( rc ) );
        !           109:                return rc;
        !           110:        }
        !           111:        return 0;
        !           112: }
        !           113: 
        !           114: /**
        !           115:  * Get GUID information
        !           116:  *
        !           117:  * @v ibdev            Infiniband device
        !           118:  * @v local_mad                Method for issuing local MADs
        !           119:  * @v mad              Management datagram to fill in
        !           120:  * @ret rc             Return status code
        !           121:  */
        !           122: static int ib_smc_get_guid_info ( struct ib_device *ibdev,
        !           123:                                  ib_local_mad_t local_mad,
        !           124:                                  union ib_mad *mad ) {
        !           125:        int rc;
        !           126: 
        !           127:        /* Issue MAD */
        !           128:        if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_GUID_INFO ), 0,
        !           129:                                 local_mad, mad ) ) != 0 ) {
        !           130:                DBGC ( ibdev, "IBDEV %p could not get GUID info: %s\n",
        !           131:                       ibdev, strerror ( rc ) );
        !           132:                return rc;
        !           133:        }
        !           134:        return 0;
        !           135: }
        !           136: 
        !           137: /**
        !           138:  * Get partition key table
        !           139:  *
        !           140:  * @v ibdev            Infiniband device
        !           141:  * @v local_mad                Method for issuing local MADs
        !           142:  * @v mad              Management datagram to fill in
        !           143:  * @ret rc             Return status code
        !           144:  */
        !           145: static int ib_smc_get_pkey_table ( struct ib_device *ibdev,
        !           146:                                   ib_local_mad_t local_mad,
        !           147:                                   union ib_mad *mad ) {
        !           148:        int rc;
        !           149: 
        !           150:        /* Issue MAD */
        !           151:        if ( ( rc = ib_smc_mad ( ibdev, htons ( IB_SMP_ATTR_PKEY_TABLE ), 0,
        !           152:                                 local_mad, mad ) ) != 0 ) {
        !           153:                DBGC ( ibdev, "IBDEV %p could not get pkey table: %s\n",
        !           154:                       ibdev, strerror ( rc ) );
        !           155:                return rc;
        !           156:        }
        !           157:        return 0;
        !           158: }
        !           159: 
        !           160: /**
        !           161:  * Get Infiniband parameters using SMC
        !           162:  *
        !           163:  * @v ibdev            Infiniband device
        !           164:  * @v local_mad                Method for issuing local MADs
        !           165:  * @ret rc             Return status code
        !           166:  */
        !           167: static int ib_smc_get ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
        !           168:        union ib_mad mad;
        !           169:        struct ib_node_info *node_info = &mad.smp.smp_data.node_info;
        !           170:        struct ib_port_info *port_info = &mad.smp.smp_data.port_info;
        !           171:        struct ib_guid_info *guid_info = &mad.smp.smp_data.guid_info;
        !           172:        struct ib_pkey_table *pkey_table = &mad.smp.smp_data.pkey_table;
        !           173:        int rc;
        !           174: 
        !           175:        /* Node info gives us the node GUID */
        !           176:        if ( ( rc = ib_smc_get_node_info ( ibdev, local_mad, &mad ) ) != 0 )
        !           177:                return rc;
        !           178:        memcpy ( &ibdev->node_guid, &node_info->node_guid,
        !           179:                 sizeof ( ibdev->node_guid ) );
        !           180: 
        !           181:        /* Port info gives us the link state, the first half of the
        !           182:         * port GID and the SM LID.
        !           183:         */
        !           184:        if ( ( rc = ib_smc_get_port_info ( ibdev, local_mad, &mad ) ) != 0 )
        !           185:                return rc;
        !           186:        memcpy ( &ibdev->gid.s.prefix, port_info->gid_prefix,
        !           187:                 sizeof ( ibdev->gid.s.prefix ) );
        !           188:        ibdev->lid = ntohs ( port_info->lid );
        !           189:        ibdev->sm_lid = ntohs ( port_info->mastersm_lid );
        !           190:        ibdev->link_width_enabled = port_info->link_width_enabled;
        !           191:        ibdev->link_width_supported = port_info->link_width_supported;
        !           192:        ibdev->link_width_active = port_info->link_width_active;
        !           193:        ibdev->link_speed_supported =
        !           194:                ( port_info->link_speed_supported__port_state >> 4 );
        !           195:        ibdev->port_state =
        !           196:                ( port_info->link_speed_supported__port_state & 0xf );
        !           197:        ibdev->link_speed_active =
        !           198:                ( port_info->link_speed_active__link_speed_enabled >> 4 );
        !           199:        ibdev->link_speed_enabled =
        !           200:                ( port_info->link_speed_active__link_speed_enabled & 0xf );
        !           201:        ibdev->sm_sl = ( port_info->neighbour_mtu__mastersm_sl & 0xf );
        !           202: 
        !           203:        /* GUID info gives us the second half of the port GID */
        !           204:        if ( ( rc = ib_smc_get_guid_info ( ibdev, local_mad, &mad ) ) != 0 )
        !           205:                return rc;
        !           206:        memcpy ( &ibdev->gid.s.guid, guid_info->guid[0],
        !           207:                 sizeof ( ibdev->gid.s.guid ) );
        !           208: 
        !           209:        /* Get partition key */
        !           210:        if ( ( rc = ib_smc_get_pkey_table ( ibdev, local_mad, &mad ) ) != 0 )
        !           211:                return rc;
        !           212:        ibdev->pkey = ntohs ( pkey_table->pkey[0] );
        !           213: 
        !           214:        DBGC ( ibdev, "IBDEV %p port GID is " IB_GID_FMT "\n",
        !           215:               ibdev, IB_GID_ARGS ( &ibdev->gid ) );
        !           216: 
        !           217:        return 0;
        !           218: }
        !           219: 
        !           220: /**
        !           221:  * Initialise Infiniband parameters using SMC
        !           222:  *
        !           223:  * @v ibdev            Infiniband device
        !           224:  * @v local_mad                Method for issuing local MADs
        !           225:  * @ret rc             Return status code
        !           226:  */
        !           227: int ib_smc_init ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
        !           228:        int rc;
        !           229: 
        !           230:        /* Get MAD parameters */
        !           231:        if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
        !           232:                return rc;
        !           233: 
        !           234:        return 0;
        !           235: }
        !           236: 
        !           237: /**
        !           238:  * Update Infiniband parameters using SMC
        !           239:  *
        !           240:  * @v ibdev            Infiniband device
        !           241:  * @v local_mad                Method for issuing local MADs
        !           242:  * @ret rc             Return status code
        !           243:  */
        !           244: int ib_smc_update ( struct ib_device *ibdev, ib_local_mad_t local_mad ) {
        !           245:        int rc;
        !           246: 
        !           247:        /* Get MAD parameters */
        !           248:        if ( ( rc = ib_smc_get ( ibdev, local_mad ) ) != 0 )
        !           249:                return rc;
        !           250: 
        !           251:        /* Notify Infiniband core of potential link state change */
        !           252:        ib_link_state_changed ( ibdev );
        !           253: 
        !           254:        return 0;
        !           255: }

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