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- /*
- * Copyright Fen Systems Ltd. 2007. Portions of this code are derived
- * from IBM Corporation Sample Programs. Copyright IBM Corporation
- * 2004, 2007. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- */
-
- FILE_LICENCE ( BSD2 );
-
- #include <stdint.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <errno.h>
- #include <byteswap.h>
- #include <ipxe/pci.h>
- #include <ipxe/acpi.h>
- #include <ipxe/in.h>
- #include <ipxe/netdevice.h>
- #include <ipxe/ethernet.h>
- #include <ipxe/vlan.h>
- #include <ipxe/tcpip.h>
- #include <ipxe/dhcp.h>
- #include <ipxe/iscsi.h>
- #include <ipxe/ibft.h>
-
- /** @file
- *
- * iSCSI boot firmware table
- *
- * The information in this file is derived from the document "iSCSI
- * Boot Firmware Table (iBFT)" as published by IBM at
- *
- * ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
- *
- */
-
- /**
- * iSCSI string buffer
- *
- * This is an internal structure that we use to keep track of the
- * allocation of string data.
- */
- struct ibft_strings {
- /** Strings data */
- char *data;
- /** Starting offset of strings */
- size_t start;
- /** Total length */
- size_t len;
- };
-
- /**
- * Align structure within iBFT
- *
- * @v len Unaligned length (or offset)
- * @ret len Aligned length (or offset)
- */
- static inline size_t ibft_align ( size_t len ) {
-
- return ( ( len + IBFT_ALIGN - 1 ) & ~( IBFT_ALIGN - 1 ) );
- }
-
- /**
- * Fill in an IP address field within iBFT
- *
- * @v ipaddr IP address field
- * @v in IPv4 address
- */
- static void ibft_set_ipaddr ( struct ibft_ipaddr *ipaddr, struct in_addr in ) {
- memset ( ipaddr, 0, sizeof ( *ipaddr ) );
- if ( in.s_addr ) {
- ipaddr->in = in;
- ipaddr->ones = 0xffff;
- }
- }
-
- /**
- * Fill in an IP address within iBFT from configuration setting
- *
- * @v settings Parent settings block, or NULL
- * @v ipaddr IP address field
- * @v setting Configuration setting
- * @v count Maximum number of IP addresses
- */
- static void ibft_set_ipaddr_setting ( struct settings *settings,
- struct ibft_ipaddr *ipaddr,
- const struct setting *setting,
- unsigned int count ) {
- struct in_addr in[count];
- unsigned int i;
-
- fetch_ipv4_array_setting ( settings, setting, in, count );
- for ( i = 0 ; i < count ; i++ ) {
- ibft_set_ipaddr ( &ipaddr[i], in[i] );
- }
- }
-
- /**
- * Read IP address from iBFT (for debugging)
- *
- * @v strings iBFT string block descriptor
- * @v string String field
- * @ret ipaddr IP address string
- */
- static const char * ibft_ipaddr ( struct ibft_ipaddr *ipaddr ) {
- return inet_ntoa ( ipaddr->in );
- }
-
- /**
- * Allocate a string within iBFT
- *
- * @v strings iBFT string block descriptor
- * @v string String field to fill in
- * @v len Length of string to allocate (excluding NUL)
- * @ret dest String destination, or NULL
- */
- static char * ibft_alloc_string ( struct ibft_strings *strings,
- struct ibft_string *string, size_t len ) {
- size_t new_len;
- char *new_data;
- char *dest;
-
- /* Extend string data buffer */
- new_len = ( strings->len + len + 1 /* NUL */ );
- new_data = realloc ( strings->data, new_len );
- if ( ! new_data )
- return NULL;
- strings->data = new_data;
-
- /* Fill in string field */
- string->offset = cpu_to_le16 ( strings->start + strings->len );
- string->len = cpu_to_le16 ( len );
-
- /* Zero string */
- dest = ( strings->data + strings->len );
- memset ( dest, 0, ( len + 1 /* NUL */ ) );
-
- /* Update allocated length */
- strings->len = new_len;
-
- return dest;
- }
-
- /**
- * Fill in a string field within iBFT
- *
- * @v strings iBFT string block descriptor
- * @v string String field
- * @v data String to fill in, or NULL
- * @ret rc Return status code
- */
- static int ibft_set_string ( struct ibft_strings *strings,
- struct ibft_string *string, const char *data ) {
- char *dest;
-
- if ( ! data )
- return 0;
-
- dest = ibft_alloc_string ( strings, string, strlen ( data ) );
- if ( ! dest )
- return -ENOBUFS;
- strcpy ( dest, data );
-
- return 0;
- }
-
- /**
- * Fill in a string field within iBFT from configuration setting
- *
- * @v settings Parent settings block, or NULL
- * @v strings iBFT string block descriptor
- * @v string String field
- * @v setting Configuration setting
- * @ret rc Return status code
- */
- static int ibft_set_string_setting ( struct settings *settings,
- struct ibft_strings *strings,
- struct ibft_string *string,
- const struct setting *setting ) {
- struct settings *origin;
- struct setting fetched;
- int len;
- char *dest;
-
- len = fetch_setting ( settings, setting, &origin, &fetched, NULL, 0 );
- if ( len < 0 ) {
- string->offset = 0;
- string->len = 0;
- return 0;
- }
-
- dest = ibft_alloc_string ( strings, string, len );
- if ( ! dest )
- return -ENOBUFS;
- fetch_string_setting ( origin, &fetched, dest, ( len + 1 ));
-
- return 0;
- }
-
- /**
- * Read string from iBFT (for debugging)
- *
- * @v strings iBFT string block descriptor
- * @v string String field
- * @ret data String content (or "<empty>")
- */
- static const char * ibft_string ( struct ibft_strings *strings,
- struct ibft_string *string ) {
- size_t offset = le16_to_cpu ( string->offset );
-
- return ( offset ? ( strings->data + offset - strings->start ) : NULL );
- }
-
- /**
- * Check if network device is required for the iBFT
- *
- * @v netdev Network device
- * @ret is_required Network device is required
- */
- static int ibft_netdev_is_required ( struct net_device *netdev ) {
- struct iscsi_session *iscsi;
- struct sockaddr_tcpip *st_target;
-
- list_for_each_entry ( iscsi, &ibft_model.descs, desc.list ) {
- st_target = ( struct sockaddr_tcpip * ) &iscsi->target_sockaddr;
- if ( tcpip_netdev ( st_target ) == netdev )
- return 1;
- }
-
- return 0;
- }
-
- /**
- * Fill in NIC portion of iBFT
- *
- * @v nic NIC portion of iBFT
- * @v strings iBFT string block descriptor
- * @v netdev Network device
- * @ret rc Return status code
- */
- static int ibft_fill_nic ( struct ibft_nic *nic,
- struct ibft_strings *strings,
- struct net_device *netdev ) {
- struct ll_protocol *ll_protocol = netdev->ll_protocol;
- struct in_addr netmask_addr = { 0 };
- unsigned int netmask_count = 0;
- struct settings *parent = netdev_settings ( netdev );
- struct settings *origin;
- int rc;
-
- /* Fill in common header */
- nic->header.structure_id = IBFT_STRUCTURE_ID_NIC;
- nic->header.version = 1;
- nic->header.length = cpu_to_le16 ( sizeof ( *nic ) );
- nic->header.flags = ( IBFT_FL_NIC_BLOCK_VALID |
- IBFT_FL_NIC_FIRMWARE_BOOT_SELECTED );
- DBG ( "iBFT NIC %d is %s\n", nic->header.index, netdev->name );
-
- /* Determine origin of IP address */
- fetch_setting ( parent, &ip_setting, &origin, NULL, NULL, 0 );
- nic->origin = ( ( origin == parent ) ?
- IBFT_NIC_ORIGIN_MANUAL : IBFT_NIC_ORIGIN_DHCP );
- DBG ( "iBFT NIC %d origin = %d\n", nic->header.index, nic->origin );
-
- /* Extract values from configuration settings */
- ibft_set_ipaddr_setting ( parent, &nic->ip_address, &ip_setting, 1 );
- DBG ( "iBFT NIC %d IP = %s\n",
- nic->header.index, ibft_ipaddr ( &nic->ip_address ) );
- ibft_set_ipaddr_setting ( parent, &nic->gateway, &gateway_setting, 1 );
- DBG ( "iBFT NIC %d gateway = %s\n",
- nic->header.index, ibft_ipaddr ( &nic->gateway ) );
- ibft_set_ipaddr_setting ( NULL, &nic->dns[0], &dns_setting,
- ( sizeof ( nic->dns ) /
- sizeof ( nic->dns[0] ) ) );
- ibft_set_ipaddr_setting ( parent, &nic->dhcp, &dhcp_server_setting, 1 );
- DBG ( "iBFT NIC %d DNS = %s",
- nic->header.index, ibft_ipaddr ( &nic->dns[0] ) );
- DBG ( ", %s\n", ibft_ipaddr ( &nic->dns[1] ) );
- if ( ( rc = ibft_set_string_setting ( NULL, strings, &nic->hostname,
- &hostname_setting ) ) != 0 )
- return rc;
- DBG ( "iBFT NIC %d hostname = %s\n",
- nic->header.index, ibft_string ( strings, &nic->hostname ) );
-
- /* Derive subnet mask prefix from subnet mask */
- fetch_ipv4_setting ( parent, &netmask_setting, &netmask_addr );
- while ( netmask_addr.s_addr ) {
- if ( netmask_addr.s_addr & 0x1 )
- netmask_count++;
- netmask_addr.s_addr >>= 1;
- }
- nic->subnet_mask_prefix = netmask_count;
- DBG ( "iBFT NIC %d subnet = /%d\n",
- nic->header.index, nic->subnet_mask_prefix );
-
- /* Extract values from net-device configuration */
- nic->vlan = cpu_to_le16 ( vlan_tag ( netdev ) );
- DBG ( "iBFT NIC %d VLAN = %02x\n",
- nic->header.index, le16_to_cpu ( nic->vlan ) );
- if ( ( rc = ll_protocol->eth_addr ( netdev->ll_addr,
- nic->mac_address ) ) != 0 ) {
- DBG ( "Could not determine %s MAC: %s\n",
- netdev->name, strerror ( rc ) );
- return rc;
- }
- DBG ( "iBFT NIC %d MAC = %s\n",
- nic->header.index, eth_ntoa ( nic->mac_address ) );
- nic->pci_bus_dev_func = cpu_to_le16 ( netdev->dev->desc.location );
- DBG ( "iBFT NIC %d PCI = %04x\n",
- nic->header.index, le16_to_cpu ( nic->pci_bus_dev_func ) );
-
- return 0;
- }
-
- /**
- * Fill in Initiator portion of iBFT
- *
- * @v initiator Initiator portion of iBFT
- * @v strings iBFT string block descriptor
- * @v initiator_iqn Initiator IQN
- * @ret rc Return status code
- */
- static int ibft_fill_initiator ( struct ibft_initiator *initiator,
- struct ibft_strings *strings,
- const char *initiator_iqn ) {
- int rc;
-
- /* Fill in common header */
- initiator->header.structure_id = IBFT_STRUCTURE_ID_INITIATOR;
- initiator->header.version = 1;
- initiator->header.length = cpu_to_le16 ( sizeof ( *initiator ) );
- initiator->header.flags = ( IBFT_FL_INITIATOR_BLOCK_VALID |
- IBFT_FL_INITIATOR_FIRMWARE_BOOT_SELECTED );
-
- /* Fill in initiator name */
- if ( ( rc = ibft_set_string ( strings, &initiator->initiator_name,
- initiator_iqn ) ) != 0 )
- return rc;
- DBG ( "iBFT initiator name = %s\n",
- ibft_string ( strings, &initiator->initiator_name ) );
-
- return 0;
- }
-
- /**
- * Fill in Target NIC association
- *
- * @v target Target portion of iBFT
- * @v iscsi iSCSI session
- * @ret rc Return status code
- */
- static int ibft_fill_target_nic_association ( struct ibft_target *target,
- struct iscsi_session *iscsi ) {
- struct sockaddr_tcpip *st_target =
- ( struct sockaddr_tcpip * ) &iscsi->target_sockaddr;
- struct net_device *associated;
- struct net_device *netdev;
-
- /* Find network device used to reach target */
- associated = tcpip_netdev ( st_target );
- if ( ! associated ) {
- DBG ( "iBFT target %d has no net device\n",
- target->header.index );
- return -EHOSTUNREACH;
- }
-
- /* Calculate association */
- for_each_netdev ( netdev ) {
- if ( netdev == associated ) {
- DBG ( "iBFT target %d uses NIC %d (%s)\n",
- target->header.index, target->nic_association,
- netdev->name );
- return 0;
- }
- if ( ! ibft_netdev_is_required ( netdev ) )
- continue;
- target->nic_association++;
- }
-
- DBG ( "iBFT target %d has impossible NIC %s\n",
- target->header.index, netdev->name );
- return -EINVAL;
- }
-
- /**
- * Fill in Target CHAP portion of iBFT
- *
- * @v target Target portion of iBFT
- * @v strings iBFT string block descriptor
- * @v iscsi iSCSI session
- * @ret rc Return status code
- */
- static int ibft_fill_target_chap ( struct ibft_target *target,
- struct ibft_strings *strings,
- struct iscsi_session *iscsi ) {
- int rc;
-
- if ( ! ( iscsi->status & ISCSI_STATUS_AUTH_FORWARD_REQUIRED ) )
- return 0;
-
- assert ( iscsi->initiator_username );
- assert ( iscsi->initiator_password );
-
- target->chap_type = IBFT_CHAP_ONE_WAY;
- if ( ( rc = ibft_set_string ( strings, &target->chap_name,
- iscsi->initiator_username ) ) != 0 )
- return rc;
- DBG ( "iBFT target %d username = %s\n", target->header.index,
- ibft_string ( strings, &target->chap_name ) );
- if ( ( rc = ibft_set_string ( strings, &target->chap_secret,
- iscsi->initiator_password ) ) != 0 )
- return rc;
- DBG ( "iBFT target %d password = <redacted>\n", target->header.index );
-
- return 0;
- }
-
- /**
- * Fill in Target Reverse CHAP portion of iBFT
- *
- * @v target Target portion of iBFT
- * @v strings iBFT string block descriptor
- * @v iscsi iSCSI session
- * @ret rc Return status code
- */
- static int ibft_fill_target_reverse_chap ( struct ibft_target *target,
- struct ibft_strings *strings,
- struct iscsi_session *iscsi ) {
- int rc;
-
- if ( ! ( iscsi->status & ISCSI_STATUS_AUTH_REVERSE_REQUIRED ) )
- return 0;
-
- assert ( iscsi->initiator_username );
- assert ( iscsi->initiator_password );
- assert ( iscsi->target_username );
- assert ( iscsi->target_password );
-
- target->chap_type = IBFT_CHAP_MUTUAL;
- if ( ( rc = ibft_set_string ( strings, &target->reverse_chap_name,
- iscsi->target_username ) ) != 0 )
- return rc;
- DBG ( "iBFT target %d reverse username = %s\n", target->header.index,
- ibft_string ( strings, &target->chap_name ) );
- if ( ( rc = ibft_set_string ( strings, &target->reverse_chap_secret,
- iscsi->target_password ) ) != 0 )
- return rc;
- DBG ( "iBFT target %d reverse password = <redacted>\n",
- target->header.index );
-
- return 0;
- }
-
- /**
- * Fill in Target portion of iBFT
- *
- * @v target Target portion of iBFT
- * @v strings iBFT string block descriptor
- * @v iscsi iSCSI session
- * @ret rc Return status code
- */
- static int ibft_fill_target ( struct ibft_target *target,
- struct ibft_strings *strings,
- struct iscsi_session *iscsi ) {
- struct sockaddr_tcpip *st_target =
- ( struct sockaddr_tcpip * ) &iscsi->target_sockaddr;
- struct sockaddr_in *sin_target =
- ( struct sockaddr_in * ) &iscsi->target_sockaddr;
- int rc;
-
- /* Fill in common header */
- target->header.structure_id = IBFT_STRUCTURE_ID_TARGET;
- target->header.version = 1;
- target->header.length = cpu_to_le16 ( sizeof ( *target ) );
- target->header.flags = ( IBFT_FL_TARGET_BLOCK_VALID |
- IBFT_FL_TARGET_FIRMWARE_BOOT_SELECTED );
-
- /* Fill in Target values */
- ibft_set_ipaddr ( &target->ip_address, sin_target->sin_addr );
- DBG ( "iBFT target %d IP = %s\n",
- target->header.index, ibft_ipaddr ( &target->ip_address ) );
- target->socket = cpu_to_le16 ( ntohs ( st_target->st_port ) );
- DBG ( "iBFT target %d port = %d\n",
- target->header.index, target->socket );
- memcpy ( &target->boot_lun, &iscsi->lun, sizeof ( target->boot_lun ) );
- DBG ( "iBFT target %d boot LUN = " SCSI_LUN_FORMAT "\n",
- target->header.index, SCSI_LUN_DATA ( target->boot_lun ) );
- if ( ( rc = ibft_set_string ( strings, &target->target_name,
- iscsi->target_iqn ) ) != 0 )
- return rc;
- DBG ( "iBFT target %d name = %s\n", target->header.index,
- ibft_string ( strings, &target->target_name ) );
- if ( ( rc = ibft_fill_target_nic_association ( target, iscsi ) ) != 0 )
- return rc;
- if ( ( rc = ibft_fill_target_chap ( target, strings, iscsi ) ) != 0 )
- return rc;
- if ( ( rc = ibft_fill_target_reverse_chap ( target, strings,
- iscsi ) ) != 0 )
- return rc;
-
- return 0;
- }
-
- /**
- * Check if iBFT descriptor is complete
- *
- * @v desc ACPI descriptor
- * @ret rc Return status code
- */
- static int ibft_complete ( struct acpi_descriptor *desc ) {
- struct iscsi_session *iscsi =
- container_of ( desc, struct iscsi_session, desc );
-
- /* Fail if we do not yet have the target address */
- if ( ! iscsi->target_sockaddr.sa_family )
- return -EAGAIN;
-
- return 0;
- }
-
- /**
- * Install iBFT
- *
- * @v install Installation method
- * @ret rc Return status code
- */
- static int ibft_install ( int ( * install ) ( struct acpi_header *acpi ) ) {
- struct net_device *netdev;
- struct iscsi_session *iscsi;
- struct ibft_table *table;
- struct ibft_initiator *initiator;
- struct ibft_nic *nic;
- struct ibft_target *target;
- struct ibft_strings strings;
- struct acpi_header *acpi;
- void *data;
- unsigned int targets = 0;
- unsigned int pairs = 0;
- size_t offset = 0;
- size_t table_len;
- size_t control_len;
- size_t initiator_offset;
- size_t nic_offset;
- size_t target_offset;
- size_t strings_offset;
- size_t len;
- unsigned int i;
- int rc;
-
- /* Calculate table sizes and offsets */
- list_for_each_entry ( iscsi, &ibft_model.descs, desc.list )
- targets++;
- pairs = ( sizeof ( table->control.pair ) /
- sizeof ( table->control.pair[0] ) );
- if ( pairs < targets )
- pairs = targets;
- offset = offsetof ( typeof ( *table ), control.pair );
- offset += ( pairs * sizeof ( table->control.pair[0] ) );
- table_len = offset;
- control_len = ( table_len - offsetof ( typeof ( *table ), control ) );
- offset = ibft_align ( offset );
- initiator_offset = offset;
- offset += ibft_align ( sizeof ( *initiator ) );
- nic_offset = offset;
- offset += ( pairs * ibft_align ( sizeof ( *nic ) ) );
- target_offset = offset;
- offset += ( pairs * ibft_align ( sizeof ( *target ) ) );
- strings_offset = offset;
- strings.data = NULL;
- strings.start = strings_offset;
- strings.len = 0;
- len = offset;
-
- /* Do nothing if no targets exist */
- if ( ! targets ) {
- rc = 0;
- goto no_targets;
- }
-
- /* Allocate table */
- data = zalloc ( len );
- if ( ! data ) {
- rc = -ENOMEM;
- goto err_alloc;
- }
-
- /* Fill in Control block */
- table = data;
- table->control.header.structure_id = IBFT_STRUCTURE_ID_CONTROL;
- table->control.header.version = 1;
- table->control.header.length = cpu_to_le16 ( control_len );
-
- /* Fill in Initiator block */
- initiator = ( data + initiator_offset );
- table->control.initiator = cpu_to_le16 ( initiator_offset );
- iscsi = list_first_entry ( &ibft_model.descs, struct iscsi_session,
- desc.list );
- if ( ( rc = ibft_fill_initiator ( initiator, &strings,
- iscsi->initiator_iqn ) ) != 0 )
- goto err_initiator;
-
- /* Fill in NIC blocks */
- i = 0;
- for_each_netdev ( netdev ) {
- if ( ! ibft_netdev_is_required ( netdev ) )
- continue;
- assert ( i < pairs );
- table->control.pair[i].nic = nic_offset;
- nic = ( data + nic_offset );
- nic->header.index = i;
- if ( ( rc = ibft_fill_nic ( nic, &strings, netdev ) ) != 0 )
- goto err_nic;
- i++;
- nic_offset += ibft_align ( sizeof ( *nic ) );
- }
-
- /* Fill in Target blocks */
- i = 0;
- list_for_each_entry ( iscsi, &ibft_model.descs, desc.list ) {
- assert ( i < pairs );
- table->control.pair[i].target = target_offset;
- target = ( data + target_offset );
- target->header.index = i;
- if ( ( rc = ibft_fill_target ( target, &strings, iscsi ) ) != 0)
- goto err_target;
- i++;
- target_offset += ibft_align ( sizeof ( *target ) );
- }
-
- /* Reallocate table to include space for strings */
- len += strings.len;
- acpi = realloc ( data, len );
- if ( ! acpi )
- goto err_realloc;
- data = NULL;
-
- /* Fill in ACPI header */
- acpi->signature = cpu_to_le32 ( IBFT_SIG );
- acpi->length = cpu_to_le32 ( len );
- acpi->revision = 1;
-
- /* Append strings */
- memcpy ( ( ( ( void * ) acpi ) + strings_offset ), strings.data,
- strings.len );
-
- /* Install ACPI table */
- if ( ( rc = install ( acpi ) ) != 0 ) {
- DBG ( "iBFT could not install: %s\n", strerror ( rc ) );
- goto err_install;
- }
-
- err_install:
- free ( acpi );
- err_realloc:
- err_target:
- err_nic:
- err_initiator:
- free ( data );
- err_alloc:
- no_targets:
- free ( strings.data );
- return rc;
- }
-
- /** iBFT model */
- struct acpi_model ibft_model __acpi_model = {
- .descs = LIST_HEAD_INIT ( ibft_model.descs ),
- .complete = ibft_complete,
- .install = ibft_install,
- };
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