#include <byteswap.h>
#include <errno.h>
#include <assert.h>
-#include <ipxe/list.h>
#include <ipxe/blockdev.h>
#include <ipxe/io.h>
-#include <ipxe/open.h>
-#include <ipxe/uri.h>
-#include <ipxe/process.h>
-#include <ipxe/xfer.h>
-#include <ipxe/retry.h>
-#include <ipxe/timer.h>
#include <ipxe/acpi.h>
#include <ipxe/sanboot.h>
#include <ipxe/device.h>
#include <ipxe/pci.h>
-#include <ipxe/iso9660.h>
#include <ipxe/eltorito.h>
#include <realmode.h>
#include <bios.h>
*
*/
-/**
- * Overall timeout for INT 13 commands (independent of underlying device
- *
- * Underlying devices should ideally never become totally stuck.
- * However, if they do, then the INT 13 mechanism provides no means
- * for the caller to cancel the operation, and the machine appears to
- * hang. Use an overall timeout for all commands to avoid this
- * problem and bounce timeout failures to the caller.
- */
-#define INT13_COMMAND_TIMEOUT ( 15 * TICKS_PER_SEC )
-
-/** An INT 13 emulated drive */
-struct int13_drive {
- /** Reference count */
- struct refcnt refcnt;
- /** List of all registered drives */
- struct list_head list;
-
- /** Block device URI */
- struct uri *uri;
- /** Underlying block device interface */
- struct interface block;
-
- /** BIOS in-use drive number (0x00-0xff) */
- unsigned int drive;
+/** INT 13 SAN device private data */
+struct int13_data {
/** BIOS natural drive number (0x00-0xff)
*
* This is the drive number that would have been assigned by
*/
unsigned int natural_drive;
- /** Block device capacity */
- struct block_device_capacity capacity;
- /** INT 13 emulated blocksize shift
- *
- * To allow for emulation of CD-ROM access, this represents
- * the left-shift required to translate from INT 13 blocks to
- * underlying blocks.
- */
- unsigned int blksize_shift;
-
/** Number of cylinders
*
* The cylinder number field in an INT 13 call is ten bits
*/
unsigned int sectors_per_track;
- /** Drive is a CD-ROM */
- int is_cdrom;
/** Address of El Torito boot catalog (if any) */
unsigned int boot_catalog;
-
- /** Underlying device status, if in error */
- int block_rc;
/** Status of last operation */
int last_status;
};
};
#define int13_fdd_params __use_data16 ( int13_fdd_params )
-/** List of registered emulated drives */
-static LIST_HEAD ( int13s );
-
/**
* Equipment word
*
#define num_drives __use_text16 ( num_drives )
/**
- * Calculate INT 13 drive sector size
- *
- * @v int13 Emulated drive
- * @ret blksize Sector size
- */
-static inline size_t int13_blksize ( struct int13_drive *int13 ) {
- return ( int13->capacity.blksize << int13->blksize_shift );
-}
-
-/**
- * Calculate INT 13 drive capacity
+ * Calculate SAN device capacity (limited to 32 bits)
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret blocks Number of blocks
*/
-static inline uint64_t int13_capacity ( struct int13_drive *int13 ) {
- return ( int13->capacity.blocks >> int13->blksize_shift );
-}
-
-/**
- * Calculate INT 13 drive capacity (limited to 32 bits)
- *
- * @v int13 Emulated drive
- * @ret blocks Number of blocks
- */
-static inline uint32_t int13_capacity32 ( struct int13_drive *int13 ) {
- uint64_t capacity = int13_capacity ( int13 );
+static inline uint32_t int13_capacity32 ( struct san_device *sandev ) {
+ uint64_t capacity = sandev_capacity ( sandev );
return ( ( capacity <= 0xffffffffUL ) ? capacity : 0xffffffff );
}
/**
- * Test if INT 13 drive is a floppy disk drive
- *
- * @v int13 Emulated drive
- * @ret is_fdd Emulated drive is a floppy disk
- */
-static inline int int13_is_fdd ( struct int13_drive *int13 ) {
- return ( ! ( int13->drive & 0x80 ) );
-}
-
-/** An INT 13 command */
-struct int13_command {
- /** Status */
- int rc;
- /** INT 13 drive */
- struct int13_drive *int13;
- /** Underlying block device interface */
- struct interface block;
- /** Command timeout timer */
- struct retry_timer timer;
-};
-
-/**
- * Record INT 13 drive capacity
- *
- * @v command INT 13 command
- * @v capacity Block device capacity
- */
-static void int13_command_capacity ( struct int13_command *command,
- struct block_device_capacity *capacity ) {
- memcpy ( &command->int13->capacity, capacity,
- sizeof ( command->int13->capacity ) );
-}
-
-/**
- * Close INT 13 command
- *
- * @v command INT 13 command
- * @v rc Reason for close
- */
-static void int13_command_close ( struct int13_command *command, int rc ) {
- intf_restart ( &command->block, rc );
- stop_timer ( &command->timer );
- command->rc = rc;
-}
-
-/**
- * Handle INT 13 command timer expiry
+ * Test if SAN device is a floppy disk drive
*
- * @v timer Timer
+ * @v sandev SAN device
+ * @ret is_fdd SAN device is a floppy disk drive
*/
-static void int13_command_expired ( struct retry_timer *timer,
- int over __unused ) {
- struct int13_command *command =
- container_of ( timer, struct int13_command, timer );
-
- int13_command_close ( command, -ETIMEDOUT );
+static inline int int13_is_fdd ( struct san_device *sandev ) {
+ return ( ! ( sandev->drive & 0x80 ) );
}
-/** INT 13 command interface operations */
-static struct interface_operation int13_command_op[] = {
- INTF_OP ( intf_close, struct int13_command *, int13_command_close ),
- INTF_OP ( block_capacity, struct int13_command *,
- int13_command_capacity ),
-};
-
-/** INT 13 command interface descriptor */
-static struct interface_descriptor int13_command_desc =
- INTF_DESC ( struct int13_command, block, int13_command_op );
-
/**
- * Open (or reopen) INT 13 emulated drive underlying block device
+ * Parse El Torito parameters
*
- * @v int13 Emulated drive
- * @ret rc Return status code
- */
-static int int13_reopen_block ( struct int13_drive *int13 ) {
- int rc;
-
- /* Close any existing block device */
- intf_restart ( &int13->block, -ECONNRESET );
-
- /* Open block device */
- if ( ( rc = xfer_open_uri ( &int13->block, int13->uri ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not reopen block "
- "device: %s\n", int13->drive, strerror ( rc ) );
- int13->block_rc = rc;
- return rc;
- }
-
- /* Clear block device error status */
- int13->block_rc = 0;
-
- return 0;
-}
-
-/**
- * Prepare to issue INT 13 command
- *
- * @v command INT 13 command
- * @v int13 Emulated drive
- * @ret rc Return status code
- */
-static int int13_command_start ( struct int13_command *command,
- struct int13_drive *int13 ) {
- int rc;
-
- /* Sanity check */
- assert ( command->int13 == NULL );
- assert ( ! timer_running ( &command->timer ) );
-
- /* Reopen block device if necessary */
- if ( ( int13->block_rc != 0 ) &&
- ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) )
- return rc;
-
- /* Initialise command */
- command->rc = -EINPROGRESS;
- command->int13 = int13;
- start_timer_fixed ( &command->timer, INT13_COMMAND_TIMEOUT );
-
- /* Wait for block control interface to become ready */
- while ( ( command->rc == -EINPROGRESS ) &&
- ( xfer_window ( &int13->block ) == 0 ) ) {
- step();
- }
-
- return ( ( command->rc == -EINPROGRESS ) ?
- int13->block_rc : command->rc );
-}
-
-/**
- * Wait for INT 13 command to complete
- *
- * @v command INT 13 command
- * @ret rc Return status code
- */
-static int int13_command_wait ( struct int13_command *command ) {
-
- /* Sanity check */
- assert ( timer_running ( &command->timer ) );
-
- /* Wait for command to complete */
- while ( command->rc == -EINPROGRESS )
- step();
-
- assert ( ! timer_running ( &command->timer ) );
- return command->rc;
-}
-
-/**
- * Terminate INT 13 command
- *
- * @v command INT 13 command
- */
-static void int13_command_stop ( struct int13_command *command ) {
- stop_timer ( &command->timer );
- command->int13 = NULL;
-}
-
-/** The single active INT 13 command */
-static struct int13_command int13_command = {
- .block = INTF_INIT ( int13_command_desc ),
- .timer = TIMER_INIT ( int13_command_expired ),
-};
-
-/**
- * Read from or write to INT 13 drive
- *
- * @v int13 Emulated drive
- * @v lba Starting logical block address
- * @v count Number of logical blocks
- * @v buffer Data buffer
- * @v block_rw Block read/write method
- * @ret rc Return status code
- */
-static int int13_rw ( struct int13_drive *int13, uint64_t lba,
- unsigned int count, userptr_t buffer,
- int ( * block_rw ) ( struct interface *control,
- struct interface *data,
- uint64_t lba, unsigned int count,
- userptr_t buffer, size_t len ) ) {
- struct int13_command *command = &int13_command;
- unsigned int frag_count;
- size_t frag_len;
- int rc;
-
- /* Translate to underlying blocksize */
- lba <<= int13->blksize_shift;
- count <<= int13->blksize_shift;
-
- while ( count ) {
-
- /* Determine fragment length */
- frag_count = count;
- if ( frag_count > int13->capacity.max_count )
- frag_count = int13->capacity.max_count;
- frag_len = ( int13->capacity.blksize * frag_count );
-
- /* Issue command */
- if ( ( ( rc = int13_command_start ( command, int13 ) ) != 0 ) ||
- ( ( rc = block_rw ( &int13->block, &command->block, lba,
- frag_count, buffer,
- frag_len ) ) != 0 ) ||
- ( ( rc = int13_command_wait ( command ) ) != 0 ) ) {
- int13_command_stop ( command );
- return rc;
- }
- int13_command_stop ( command );
-
- /* Move to next fragment */
- lba += frag_count;
- count -= frag_count;
- buffer = userptr_add ( buffer, frag_len );
- }
-
- return 0;
-}
-
-/**
- * Read INT 13 drive capacity
- *
- * @v int13 Emulated drive
- * @ret rc Return status code
- */
-static int int13_read_capacity ( struct int13_drive *int13 ) {
- struct int13_command *command = &int13_command;
- int rc;
-
- /* Issue command */
- if ( ( ( rc = int13_command_start ( command, int13 ) ) != 0 ) ||
- ( ( rc = block_read_capacity ( &int13->block,
- &command->block ) ) != 0 ) ||
- ( ( rc = int13_command_wait ( command ) ) != 0 ) ) {
- int13_command_stop ( command );
- return rc;
- }
-
- int13_command_stop ( command );
- return 0;
-}
-
-/**
- * Parse ISO9660 parameters
- *
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v scratch Scratch area for single-sector reads
* @ret rc Return status code
*
- * Reads and parses ISO9660 parameters, if present.
+ * Reads and parses El Torito parameters, if present.
*/
-static int int13_parse_iso9660 ( struct int13_drive *int13, void *scratch ) {
- static const struct iso9660_primary_descriptor_fixed primary_check = {
- .type = ISO9660_TYPE_PRIMARY,
- .id = ISO9660_ID,
- };
- struct iso9660_primary_descriptor *primary = scratch;
+static int int13_parse_eltorito ( struct san_device *sandev, void *scratch ) {
+ struct int13_data *int13 = sandev->priv;
static const struct eltorito_descriptor_fixed boot_check = {
.type = ISO9660_TYPE_BOOT,
.id = ISO9660_ID,
.system_id = "EL TORITO SPECIFICATION",
};
struct eltorito_descriptor *boot = scratch;
- unsigned int blksize;
- unsigned int blksize_shift;
int rc;
- /* Calculate required blocksize shift */
- blksize = int13_blksize ( int13 );
- blksize_shift = 0;
- while ( blksize < ISO9660_BLKSIZE ) {
- blksize <<= 1;
- blksize_shift++;
- }
- if ( blksize > ISO9660_BLKSIZE ) {
- /* Do nothing if the blksize is invalid for CD-ROM access */
- return 0;
- }
-
- /* Read primary volume descriptor */
- if ( ( rc = int13_rw ( int13,
- ( ISO9660_PRIMARY_LBA << blksize_shift ), 1,
- virt_to_user ( primary ), block_read ) ) != 0 ){
- DBGC ( int13, "INT13 drive %02x could not read ISO9660 "
- "primary volume descriptor: %s\n",
- int13->drive, strerror ( rc ) );
- return rc;
- }
-
- /* Do nothing unless this is an ISO image */
- if ( memcmp ( primary, &primary_check, sizeof ( primary_check ) ) != 0 )
- return 0;
- DBGC ( int13, "INT13 drive %02x contains an ISO9660 filesystem; "
- "treating as CD-ROM\n", int13->drive );
- int13->is_cdrom = 1;
-
/* Read boot record volume descriptor */
- if ( ( rc = int13_rw ( int13,
- ( ELTORITO_LBA << blksize_shift ), 1,
- virt_to_user ( boot ), block_read ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not read El Torito boot "
+ if ( ( rc = sandev_rw ( sandev, ELTORITO_LBA, 1,
+ virt_to_user ( boot ), block_read ) ) != 0 ) {
+ DBGC ( sandev, "INT13 drive %02x could not read El Torito boot "
"record volume descriptor: %s\n",
- int13->drive, strerror ( rc ) );
+ sandev->drive, strerror ( rc ) );
return rc;
}
/* Check for an El Torito boot catalog */
if ( memcmp ( boot, &boot_check, sizeof ( boot_check ) ) == 0 ) {
int13->boot_catalog = boot->sector;
- DBGC ( int13, "INT13 drive %02x has an El Torito boot catalog "
- "at LBA %08x\n", int13->drive, int13->boot_catalog );
+ DBGC ( sandev, "INT13 drive %02x has an El Torito boot catalog "
+ "at LBA %08x\n", sandev->drive, int13->boot_catalog );
} else {
- DBGC ( int13, "INT13 drive %02x has no El Torito boot "
- "catalog\n", int13->drive );
+ DBGC ( sandev, "INT13 drive %02x has no El Torito boot "
+ "catalog\n", sandev->drive );
}
- /* Configure drive for no-emulation CD-ROM access */
- int13->blksize_shift += blksize_shift;
-
return 0;
}
/**
* Guess INT 13 hard disk drive geometry
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v scratch Scratch area for single-sector reads
* @ret heads Guessed number of heads
* @ret sectors Guessed number of sectors per track
*
* Guesses the drive geometry by inspecting the partition table.
*/
-static int int13_guess_geometry_hdd ( struct int13_drive *int13, void *scratch,
+static int int13_guess_geometry_hdd ( struct san_device *sandev, void *scratch,
unsigned int *heads,
unsigned int *sectors ) {
struct master_boot_record *mbr = scratch;
*sectors = 63;
/* Read partition table */
- if ( ( rc = int13_rw ( int13, 0, 1, virt_to_user ( mbr ),
- block_read ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not read "
+ if ( ( rc = sandev_rw ( sandev, 0, 1, virt_to_user ( mbr ),
+ block_read ) ) != 0 ) {
+ DBGC ( sandev, "INT13 drive %02x could not read "
"partition table to guess geometry: %s\n",
- int13->drive, strerror ( rc ) );
+ sandev->drive, strerror ( rc ) );
return rc;
}
- DBGC2 ( int13, "INT13 drive %02x has MBR:\n", int13->drive );
- DBGC2_HDA ( int13, 0, mbr, sizeof ( *mbr ) );
- DBGC ( int13, "INT13 drive %02x has signature %08x\n",
- int13->drive, mbr->signature );
+ DBGC2 ( sandev, "INT13 drive %02x has MBR:\n", sandev->drive );
+ DBGC2_HDA ( sandev, 0, mbr, sizeof ( *mbr ) );
+ DBGC ( sandev, "INT13 drive %02x has signature %08x\n",
+ sandev->drive, mbr->signature );
/* Scan through partition table and modify guesses for
* heads and sectors_per_track if we find any used
continue;
*heads = ( end_head + 1 );
*sectors = end_sector;
- DBGC ( int13, "INT13 drive %02x guessing C/H/S xx/%d/%d based "
+ DBGC ( sandev, "INT13 drive %02x guessing C/H/S xx/%d/%d based "
"on partition %d\n",
- int13->drive, *heads, *sectors, ( i + 1 ) );
+ sandev->drive, *heads, *sectors, ( i + 1 ) );
}
return 0;
/**
* Guess INT 13 floppy disk drive geometry
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret heads Guessed number of heads
* @ret sectors Guessed number of sectors per track
* @ret rc Return status code
*
* Guesses the drive geometry by inspecting the disk size.
*/
-static int int13_guess_geometry_fdd ( struct int13_drive *int13,
+static int int13_guess_geometry_fdd ( struct san_device *sandev,
unsigned int *heads,
unsigned int *sectors ) {
- unsigned int blocks = int13_capacity ( int13 );
+ unsigned int blocks = sandev_capacity ( sandev );
const struct int13_fdd_geometry *geometry;
unsigned int cylinders;
unsigned int i;
*heads = INT13_FDD_HEADS ( geometry );
*sectors = INT13_FDD_SECTORS ( geometry );
if ( ( cylinders * (*heads) * (*sectors) ) == blocks ) {
- DBGC ( int13, "INT13 drive %02x guessing C/H/S "
- "%d/%d/%d based on size %dK\n", int13->drive,
+ DBGC ( sandev, "INT13 drive %02x guessing C/H/S "
+ "%d/%d/%d based on size %dK\n", sandev->drive,
cylinders, *heads, *sectors, ( blocks / 2 ) );
return 0;
}
*/
*heads = 2;
*sectors = 18;
- DBGC ( int13, "INT13 drive %02x guessing C/H/S xx/%d/%d based on size "
- "%dK\n", int13->drive, *heads, *sectors, ( blocks / 2 ) );
+ DBGC ( sandev, "INT13 drive %02x guessing C/H/S xx/%d/%d based on size "
+ "%dK\n", sandev->drive, *heads, *sectors, ( blocks / 2 ) );
return 0;
}
/**
* Guess INT 13 drive geometry
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v scratch Scratch area for single-sector reads
* @ret rc Return status code
*/
-static int int13_guess_geometry ( struct int13_drive *int13, void *scratch ) {
+static int int13_guess_geometry ( struct san_device *sandev, void *scratch ) {
+ struct int13_data *int13 = sandev->priv;
unsigned int guessed_heads;
unsigned int guessed_sectors;
unsigned int blocks;
unsigned int blocks_per_cyl;
int rc;
- /* Don't even try when the blksize is invalid for C/H/S access */
- if ( int13_blksize ( int13 ) != INT13_BLKSIZE )
- return 0;
-
/* Guess geometry according to drive type */
- if ( int13_is_fdd ( int13 ) ) {
- if ( ( rc = int13_guess_geometry_fdd ( int13, &guessed_heads,
+ if ( int13_is_fdd ( sandev ) ) {
+ if ( ( rc = int13_guess_geometry_fdd ( sandev, &guessed_heads,
&guessed_sectors )) != 0)
return rc;
} else {
- if ( ( rc = int13_guess_geometry_hdd ( int13, scratch,
+ if ( ( rc = int13_guess_geometry_hdd ( sandev, scratch,
&guessed_heads,
&guessed_sectors )) != 0)
return rc;
int13->sectors_per_track = guessed_sectors;
if ( ! int13->cylinders ) {
/* Avoid attempting a 64-bit divide on a 32-bit system */
- blocks = int13_capacity32 ( int13 );
+ blocks = int13_capacity32 ( sandev );
blocks_per_cyl = ( int13->heads * int13->sectors_per_track );
assert ( blocks_per_cyl != 0 );
int13->cylinders = ( blocks / blocks_per_cyl );
* Update BIOS drive count
*/
static void int13_sync_num_drives ( void ) {
- struct int13_drive *int13;
+ struct san_device *sandev;
+ struct int13_data *int13;
uint8_t *counter;
uint8_t max_drive;
uint8_t required;
num_fdds = ( ( equipment_word & 0x0001 ) ?
( ( ( equipment_word >> 6 ) & 0x3 ) + 1 ) : 0 );
- /* Ensure count is large enough to cover all of our emulated drives */
- list_for_each_entry ( int13, &int13s, list ) {
- counter = ( int13_is_fdd ( int13 ) ? &num_fdds : &num_drives );
- max_drive = int13->drive;
+ /* Ensure count is large enough to cover all of our SAN devices */
+ for_each_sandev ( sandev ) {
+ int13 = sandev->priv;
+ counter = ( int13_is_fdd ( sandev ) ? &num_fdds : &num_drives );
+ max_drive = sandev->drive;
if ( max_drive < int13->natural_drive )
max_drive = int13->natural_drive;
required = ( ( max_drive & 0x7f ) + 1 );
if ( *counter < required ) {
*counter = required;
- DBGC ( int13, "INT13 drive %02x added to drive count: "
+ DBGC ( sandev, "INT13 drive %02x added to drive count: "
"%d HDDs, %d FDDs\n",
- int13->drive, num_drives, num_fdds );
+ sandev->drive, num_drives, num_fdds );
}
}
/**
* INT 13, 00 - Reset disk system
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret status Status code
*/
-static int int13_reset ( struct int13_drive *int13,
+static int int13_reset ( struct san_device *sandev,
struct i386_all_regs *ix86 __unused ) {
int rc;
- DBGC2 ( int13, "Reset drive\n" );
-
- /* Reopen underlying block device */
- if ( ( rc = int13_reopen_block ( int13 ) ) != 0 )
- return -INT13_STATUS_RESET_FAILED;
+ DBGC2 ( sandev, "Reset drive\n" );
- /* Check that block device is functional */
- if ( ( rc = int13_read_capacity ( int13 ) ) != 0 )
+ /* Reset SAN device */
+ if ( ( rc = sandev_reset ( sandev ) ) != 0 )
return -INT13_STATUS_RESET_FAILED;
return 0;
/**
* INT 13, 01 - Get status of last operation
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret status Status code
*/
-static int int13_get_last_status ( struct int13_drive *int13,
+static int int13_get_last_status ( struct san_device *sandev,
struct i386_all_regs *ix86 __unused ) {
- DBGC2 ( int13, "Get status of last operation\n" );
+ struct int13_data *int13 = sandev->priv;
+
+ DBGC2 ( sandev, "Get status of last operation\n" );
return int13->last_status;
}
/**
* Read / write sectors
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v al Number of sectors to read or write (must be nonzero)
* @v ch Low bits of cylinder number
* @v cl (bits 7:6) High bits of cylinder number
* @ret status Status code
* @ret al Number of sectors read or written
*/
-static int int13_rw_sectors ( struct int13_drive *int13,
+static int int13_rw_sectors ( struct san_device *sandev,
struct i386_all_regs *ix86,
int ( * block_rw ) ( struct interface *control,
struct interface *data,
unsigned int count,
userptr_t buffer,
size_t len ) ) {
+ struct int13_data *int13 = sandev->priv;
unsigned int cylinder, head, sector;
unsigned long lba;
unsigned int count;
int rc;
/* Validate blocksize */
- if ( int13_blksize ( int13 ) != INT13_BLKSIZE ) {
- DBGC ( int13, "\nINT 13 drive %02x invalid blocksize (%zd) "
+ if ( sandev_blksize ( sandev ) != INT13_BLKSIZE ) {
+ DBGC ( sandev, "\nINT 13 drive %02x invalid blocksize (%zd) "
"for non-extended read/write\n",
- int13->drive, int13_blksize ( int13 ) );
+ sandev->drive, sandev_blksize ( sandev ) );
return -INT13_STATUS_INVALID;
}
if ( ( cylinder >= int13->cylinders ) ||
( head >= int13->heads ) ||
( sector < 1 ) || ( sector > int13->sectors_per_track ) ) {
- DBGC ( int13, "C/H/S %d/%d/%d out of range for geometry "
+ DBGC ( sandev, "C/H/S %d/%d/%d out of range for geometry "
"%d/%d/%d\n", cylinder, head, sector, int13->cylinders,
int13->heads, int13->sectors_per_track );
return -INT13_STATUS_INVALID;
count = ix86->regs.al;
buffer = real_to_user ( ix86->segs.es, ix86->regs.bx );
- DBGC2 ( int13, "C/H/S %d/%d/%d = LBA %08lx <-> %04x:%04x (count %d)\n",
+ DBGC2 ( sandev, "C/H/S %d/%d/%d = LBA %08lx <-> %04x:%04x (count %d)\n",
cylinder, head, sector, lba, ix86->segs.es, ix86->regs.bx,
count );
/* Read from / write to block device */
- if ( ( rc = int13_rw ( int13, lba, count, buffer, block_rw ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x I/O failed: %s\n",
- int13->drive, strerror ( rc ) );
+ if ( ( rc = sandev_rw ( sandev, lba, count, buffer, block_rw ) ) != 0 ){
+ DBGC ( sandev, "INT13 drive %02x I/O failed: %s\n",
+ sandev->drive, strerror ( rc ) );
return -INT13_STATUS_READ_ERROR;
}
/**
* INT 13, 02 - Read sectors
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v al Number of sectors to read (must be nonzero)
* @v ch Low bits of cylinder number
* @v cl (bits 7:6) High bits of cylinder number
* @ret status Status code
* @ret al Number of sectors read
*/
-static int int13_read_sectors ( struct int13_drive *int13,
+static int int13_read_sectors ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
- DBGC2 ( int13, "Read: " );
- return int13_rw_sectors ( int13, ix86, block_read );
+
+ DBGC2 ( sandev, "Read: " );
+ return int13_rw_sectors ( sandev, ix86, block_read );
}
/**
* INT 13, 03 - Write sectors
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v al Number of sectors to write (must be nonzero)
* @v ch Low bits of cylinder number
* @v cl (bits 7:6) High bits of cylinder number
* @ret status Status code
* @ret al Number of sectors written
*/
-static int int13_write_sectors ( struct int13_drive *int13,
+static int int13_write_sectors ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
- DBGC2 ( int13, "Write: " );
- return int13_rw_sectors ( int13, ix86, block_write );
+
+ DBGC2 ( sandev, "Write: " );
+ return int13_rw_sectors ( sandev, ix86, block_write );
}
/**
* INT 13, 08 - Get drive parameters
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret status Status code
* @ret ch Low bits of maximum cylinder number
* @ret cl (bits 7:6) High bits of maximum cylinder number
* @ret dh Maximum head number
* @ret dl Number of drives
*/
-static int int13_get_parameters ( struct int13_drive *int13,
+static int int13_get_parameters ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
+ struct int13_data *int13 = sandev->priv;
unsigned int max_cylinder = int13->cylinders - 1;
unsigned int max_head = int13->heads - 1;
unsigned int max_sector = int13->sectors_per_track; /* sic */
- DBGC2 ( int13, "Get drive parameters\n" );
+ DBGC2 ( sandev, "Get drive parameters\n" );
/* Validate blocksize */
- if ( int13_blksize ( int13 ) != INT13_BLKSIZE ) {
- DBGC ( int13, "\nINT 13 drive %02x invalid blocksize (%zd) "
+ if ( sandev_blksize ( sandev ) != INT13_BLKSIZE ) {
+ DBGC ( sandev, "\nINT 13 drive %02x invalid blocksize (%zd) "
"for non-extended parameters\n",
- int13->drive, int13_blksize ( int13 ) );
+ sandev->drive, sandev_blksize ( sandev ) );
return -INT13_STATUS_INVALID;
}
ix86->regs.ch = ( max_cylinder & 0xff );
ix86->regs.cl = ( ( ( max_cylinder >> 8 ) << 6 ) | max_sector );
ix86->regs.dh = max_head;
- ix86->regs.dl = ( int13_is_fdd ( int13 ) ? num_fdds : num_drives );
+ ix86->regs.dl = ( int13_is_fdd ( sandev ) ? num_fdds : num_drives );
/* Floppy-specific parameters */
- if ( int13_is_fdd ( int13 ) ) {
+ if ( int13_is_fdd ( sandev ) ) {
ix86->regs.bl = INT13_FDD_TYPE_1M44;
ix86->segs.es = rm_ds;
ix86->regs.di = __from_data16 ( &int13_fdd_params );
/**
* INT 13, 15 - Get disk type
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @ret ah Type code
* @ret cx:dx Sector count
* @ret status Status code / disk type
*/
-static int int13_get_disk_type ( struct int13_drive *int13,
+static int int13_get_disk_type ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
uint32_t blocks;
- DBGC2 ( int13, "Get disk type\n" );
+ DBGC2 ( sandev, "Get disk type\n" );
- if ( int13_is_fdd ( int13 ) ) {
+ if ( int13_is_fdd ( sandev ) ) {
return INT13_DISK_TYPE_FDD;
} else {
- blocks = int13_capacity32 ( int13 );
+ blocks = int13_capacity32 ( sandev );
ix86->regs.cx = ( blocks >> 16 );
ix86->regs.dx = ( blocks & 0xffff );
return INT13_DISK_TYPE_HDD;
/**
* INT 13, 41 - Extensions installation check
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v bx 0x55aa
* @ret bx 0xaa55
* @ret cx Extensions API support bitmap
* @ret status Status code / API version
*/
-static int int13_extension_check ( struct int13_drive *int13 __unused,
+static int int13_extension_check ( struct san_device *sandev __unused,
struct i386_all_regs *ix86 ) {
+
if ( ix86->regs.bx == 0x55aa ) {
- DBGC2 ( int13, "INT13 extensions installation check\n" );
+ DBGC2 ( sandev, "INT13 extensions installation check\n" );
ix86->regs.bx = 0xaa55;
ix86->regs.cx = ( INT13_EXTENSION_LINEAR |
INT13_EXTENSION_EDD |
/**
* Extended read / write
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Disk address packet
* @v block_rw Block read/write method
* @ret status Status code
*/
-static int int13_extended_rw ( struct int13_drive *int13,
+static int int13_extended_rw ( struct san_device *sandev,
struct i386_all_regs *ix86,
int ( * block_rw ) ( struct interface *control,
struct interface *data,
* ELTORITO.SYS seems to assume that we are really a CD-ROM if
* we support extended reads for a floppy drive.
*/
- if ( int13_is_fdd ( int13 ) )
+ if ( int13_is_fdd ( sandev ) )
return -INT13_STATUS_INVALID;
/* Get buffer size */
get_real ( bufsize, ix86->segs.ds,
( ix86->regs.si + offsetof ( typeof ( addr ), bufsize ) ) );
if ( bufsize < offsetof ( typeof ( addr ), buffer_phys ) ) {
- DBGC2 ( int13, "<invalid buffer size %#02x\n>\n", bufsize );
+ DBGC2 ( sandev, "<invalid buffer size %#02x\n>\n", bufsize );
return -INT13_STATUS_INVALID;
}
memset ( &addr, 0, sizeof ( addr ) );
copy_from_real ( &addr, ix86->segs.ds, ix86->regs.si, bufsize );
lba = addr.lba;
- DBGC2 ( int13, "LBA %08llx <-> ", ( ( unsigned long long ) lba ) );
+ DBGC2 ( sandev, "LBA %08llx <-> ", ( ( unsigned long long ) lba ) );
if ( ( addr.count == 0xff ) ||
( ( addr.buffer.segment == 0xffff ) &&
( addr.buffer.offset == 0xffff ) ) ) {
buffer = phys_to_user ( addr.buffer_phys );
- DBGC2 ( int13, "%08llx",
+ DBGC2 ( sandev, "%08llx",
( ( unsigned long long ) addr.buffer_phys ) );
} else {
buffer = real_to_user ( addr.buffer.segment,
addr.buffer.offset );
- DBGC2 ( int13, "%04x:%04x", addr.buffer.segment,
+ DBGC2 ( sandev, "%04x:%04x", addr.buffer.segment,
addr.buffer.offset );
}
if ( addr.count <= 0x7f ) {
} else if ( addr.count == 0xff ) {
count = addr.long_count;
} else {
- DBGC2 ( int13, " <invalid count %#02x>\n", addr.count );
+ DBGC2 ( sandev, " <invalid count %#02x>\n", addr.count );
return -INT13_STATUS_INVALID;
}
- DBGC2 ( int13, " (count %ld)\n", count );
+ DBGC2 ( sandev, " (count %ld)\n", count );
/* Read from / write to block device */
- if ( ( rc = int13_rw ( int13, lba, count, buffer, block_rw ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x extended I/O failed: %s\n",
- int13->drive, strerror ( rc ) );
+ if ( ( rc = sandev_rw ( sandev, lba, count, buffer, block_rw ) ) != 0 ){
+ DBGC ( sandev, "INT13 drive %02x extended I/O failed: %s\n",
+ sandev->drive, strerror ( rc ) );
/* Record that no blocks were transferred successfully */
addr.count = 0;
put_real ( addr.count, ix86->segs.ds,
/**
* INT 13, 42 - Extended read
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Disk address packet
* @ret status Status code
*/
-static int int13_extended_read ( struct int13_drive *int13,
+static int int13_extended_read ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
- DBGC2 ( int13, "Extended read: " );
- return int13_extended_rw ( int13, ix86, block_read );
+
+ DBGC2 ( sandev, "Extended read: " );
+ return int13_extended_rw ( sandev, ix86, block_read );
}
/**
* INT 13, 43 - Extended write
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Disk address packet
* @ret status Status code
*/
-static int int13_extended_write ( struct int13_drive *int13,
+static int int13_extended_write ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
- DBGC2 ( int13, "Extended write: " );
- return int13_extended_rw ( int13, ix86, block_write );
+
+ DBGC2 ( sandev, "Extended write: " );
+ return int13_extended_rw ( sandev, ix86, block_write );
}
/**
* INT 13, 44 - Verify sectors
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Disk address packet
* @ret status Status code
*/
-static int int13_extended_verify ( struct int13_drive *int13,
+static int int13_extended_verify ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
struct int13_disk_address addr;
uint64_t lba;
sizeof ( addr ));
lba = addr.lba;
count = addr.count;
- DBGC2 ( int13, "Verify: LBA %08llx (count %ld)\n",
+ DBGC2 ( sandev, "Verify: LBA %08llx (count %ld)\n",
( ( unsigned long long ) lba ), count );
}
/**
* INT 13, 44 - Extended seek
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Disk address packet
* @ret status Status code
*/
-static int int13_extended_seek ( struct int13_drive *int13,
+static int int13_extended_seek ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
struct int13_disk_address addr;
uint64_t lba;
sizeof ( addr ));
lba = addr.lba;
count = addr.count;
- DBGC2 ( int13, "Seek: LBA %08llx (count %ld)\n",
+ DBGC2 ( sandev, "Seek: LBA %08llx (count %ld)\n",
( ( unsigned long long ) lba ), count );
}
/**
* Build device path information
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v dpi Device path information
* @ret rc Return status code
*/
-static int int13_device_path_info ( struct int13_drive *int13,
+static int int13_device_path_info ( struct san_device *sandev,
struct edd_device_path_information *dpi ) {
struct device *device;
struct device_description *desc;
int rc;
/* Reopen block device if necessary */
- if ( ( int13->block_rc != 0 ) &&
- ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) )
+ if ( sandev_needs_reopen ( sandev ) &&
+ ( ( rc = sandev_reopen ( sandev ) ) != 0 ) )
return rc;
/* Get underlying hardware device */
- device = identify_device ( &int13->block );
+ device = identify_device ( &sandev->block );
if ( ! device ) {
- DBGC ( int13, "INT13 drive %02x cannot identify hardware "
- "device\n", int13->drive );
+ DBGC ( sandev, "INT13 drive %02x cannot identify hardware "
+ "device\n", sandev->drive );
return -ENODEV;
}
dpi->interface_path.pci.channel = 0xff; /* unused */
break;
default:
- DBGC ( int13, "INT13 drive %02x unrecognised bus type %d\n",
- int13->drive, desc->bus_type );
+ DBGC ( sandev, "INT13 drive %02x unrecognised bus type %d\n",
+ sandev->drive, desc->bus_type );
return -ENOTSUP;
}
/* Get EDD block device description */
- if ( ( rc = edd_describe ( &int13->block, &dpi->interface_type,
+ if ( ( rc = edd_describe ( &sandev->block, &dpi->interface_type,
&dpi->device_path ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x cannot identify block device: "
- "%s\n", int13->drive, strerror ( rc ) );
+ DBGC ( sandev, "INT13 drive %02x cannot identify block device: "
+ "%s\n", sandev->drive, strerror ( rc ) );
return rc;
}
/**
* INT 13, 48 - Get extended parameters
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Drive parameter table
* @ret status Status code
*/
-static int int13_get_extended_parameters ( struct int13_drive *int13,
+static int int13_get_extended_parameters ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
+ struct int13_data *int13 = sandev->priv;
struct int13_disk_parameters params;
struct segoff address;
size_t len = sizeof ( params );
get_real ( bufsize, ix86->segs.ds,
( ix86->regs.si + offsetof ( typeof ( params ), bufsize )));
- DBGC2 ( int13, "Get extended drive parameters to %04x:%04x+%02x\n",
+ DBGC2 ( sandev, "Get extended drive parameters to %04x:%04x+%02x\n",
ix86->segs.ds, ix86->regs.si, bufsize );
/* Build drive parameters */
memset ( ¶ms, 0, sizeof ( params ) );
params.flags = INT13_FL_DMA_TRANSPARENT;
if ( ( int13->cylinders < 1024 ) &&
- ( int13_capacity ( int13 ) <= INT13_MAX_CHS_SECTORS ) ) {
+ ( sandev_capacity ( sandev ) <= INT13_MAX_CHS_SECTORS ) ) {
params.flags |= INT13_FL_CHS_VALID;
}
params.cylinders = int13->cylinders;
params.heads = int13->heads;
params.sectors_per_track = int13->sectors_per_track;
- params.sectors = int13_capacity ( int13 );
- params.sector_size = int13_blksize ( int13 );
+ params.sectors = sandev_capacity ( sandev );
+ params.sector_size = sandev_blksize ( sandev );
memset ( ¶ms.dpte, 0xff, sizeof ( params.dpte ) );
- if ( ( rc = int13_device_path_info ( int13, ¶ms.dpi ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not provide device "
+ if ( ( rc = int13_device_path_info ( sandev, ¶ms.dpi ) ) != 0 ) {
+ DBGC ( sandev, "INT13 drive %02x could not provide device "
"path information: %s\n",
- int13->drive, strerror ( rc ) );
+ sandev->drive, strerror ( rc ) );
len = offsetof ( typeof ( params ), dpi );
}
params.bufsize = offsetof ( typeof ( params ), dpi );
}
- DBGC ( int13, "INT 13 drive %02x described using extended "
- "parameters:\n", int13->drive );
+ DBGC ( sandev, "INT 13 drive %02x described using extended "
+ "parameters:\n", sandev->drive );
address.segment = ix86->segs.ds;
address.offset = ix86->regs.si;
- DBGC_HDA ( int13, address, ¶ms, len );
+ DBGC_HDA ( sandev, address, ¶ms, len );
/* Return drive parameters */
if ( len > bufsize )
/**
* INT 13, 4b - Get status or terminate CD-ROM emulation
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Specification packet
* @ret status Status code
*/
-static int int13_cdrom_status_terminate ( struct int13_drive *int13,
+static int int13_cdrom_status_terminate ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
struct int13_cdrom_specification specification;
- DBGC2 ( int13, "Get CD-ROM emulation status to %04x:%04x%s\n",
+ DBGC2 ( sandev, "Get CD-ROM emulation status to %04x:%04x%s\n",
ix86->segs.ds, ix86->regs.si,
( ix86->regs.al ? "" : " and terminate" ) );
/* Fail if we are not a CD-ROM */
- if ( ! int13->is_cdrom ) {
- DBGC ( int13, "INT13 drive %02x is not a CD-ROM\n",
- int13->drive );
+ if ( ! sandev->is_cdrom ) {
+ DBGC ( sandev, "INT13 drive %02x is not a CD-ROM\n",
+ sandev->drive );
return -INT13_STATUS_INVALID;
}
/* Build specification packet */
memset ( &specification, 0, sizeof ( specification ) );
specification.size = sizeof ( specification );
- specification.drive = int13->drive;
+ specification.drive = sandev->drive;
/* Return specification packet */
copy_to_real ( ix86->segs.ds, ix86->regs.si, &specification,
/**
* INT 13, 4d - Read CD-ROM boot catalog
*
- * @v int13 Emulated drive
+ * @v sandev SAN device
* @v ds:si Command packet
* @ret status Status code
*/
-static int int13_cdrom_read_boot_catalog ( struct int13_drive *int13,
+static int int13_cdrom_read_boot_catalog ( struct san_device *sandev,
struct i386_all_regs *ix86 ) {
+ struct int13_data *int13 = sandev->priv;
struct int13_cdrom_boot_catalog_command command;
int rc;
/* Read parameters from command packet */
copy_from_real ( &command, ix86->segs.ds, ix86->regs.si,
sizeof ( command ) );
- DBGC2 ( int13, "Read CD-ROM boot catalog to %08x\n", command.buffer );
+ DBGC2 ( sandev, "Read CD-ROM boot catalog to %08x\n", command.buffer );
/* Fail if we have no boot catalog */
if ( ! int13->boot_catalog ) {
- DBGC ( int13, "INT13 drive %02x has no boot catalog\n",
- int13->drive );
+ DBGC ( sandev, "INT13 drive %02x has no boot catalog\n",
+ sandev->drive );
return -INT13_STATUS_INVALID;
}
/* Read from boot catalog */
- if ( ( rc = int13_rw ( int13, ( int13->boot_catalog + command.start ),
- command.count, phys_to_user ( command.buffer ),
- block_read ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not read boot catalog: "
- "%s\n", int13->drive, strerror ( rc ) );
+ if ( ( rc = sandev_rw ( sandev, ( int13->boot_catalog + command.start ),
+ command.count, phys_to_user ( command.buffer ),
+ block_read ) ) != 0 ) {
+ DBGC ( sandev, "INT13 drive %02x could not read boot catalog: "
+ "%s\n", sandev->drive, strerror ( rc ) );
return -INT13_STATUS_READ_ERROR;
}
static __asmcall void int13 ( struct i386_all_regs *ix86 ) {
int command = ix86->regs.ah;
unsigned int bios_drive = ix86->regs.dl;
- struct int13_drive *int13;
+ struct san_device *sandev;
+ struct int13_data *int13;
int status;
/* Check BIOS hasn't killed off our drive */
int13_check_num_drives();
- list_for_each_entry ( int13, &int13s, list ) {
+ for_each_sandev ( sandev ) {
- if ( bios_drive != int13->drive ) {
+ int13 = sandev->priv;
+ if ( bios_drive != sandev->drive ) {
/* Remap any accesses to this drive's natural number */
if ( bios_drive == int13->natural_drive ) {
- DBGC2 ( int13, "INT13,%02x (%02x) remapped to "
+ DBGC2 ( sandev, "INT13,%02x (%02x) remapped to "
"(%02x)\n", ix86->regs.ah,
- bios_drive, int13->drive );
- ix86->regs.dl = int13->drive;
+ bios_drive, sandev->drive );
+ ix86->regs.dl = sandev->drive;
return;
} else if ( ( ( bios_drive & 0x7f ) == 0x7f ) &&
( command == INT13_CDROM_STATUS_TERMINATE )
- && int13->is_cdrom ) {
+ && sandev->is_cdrom ) {
/* Catch non-drive-specific CD-ROM calls */
} else {
continue;
}
}
- DBGC2 ( int13, "INT13,%02x (%02x): ",
+ DBGC2 ( sandev, "INT13,%02x (%02x): ",
ix86->regs.ah, bios_drive );
switch ( command ) {
case INT13_RESET:
- status = int13_reset ( int13, ix86 );
+ status = int13_reset ( sandev, ix86 );
break;
case INT13_GET_LAST_STATUS:
- status = int13_get_last_status ( int13, ix86 );
+ status = int13_get_last_status ( sandev, ix86 );
break;
case INT13_READ_SECTORS:
- status = int13_read_sectors ( int13, ix86 );
+ status = int13_read_sectors ( sandev, ix86 );
break;
case INT13_WRITE_SECTORS:
- status = int13_write_sectors ( int13, ix86 );
+ status = int13_write_sectors ( sandev, ix86 );
break;
case INT13_GET_PARAMETERS:
- status = int13_get_parameters ( int13, ix86 );
+ status = int13_get_parameters ( sandev, ix86 );
break;
case INT13_GET_DISK_TYPE:
- status = int13_get_disk_type ( int13, ix86 );
+ status = int13_get_disk_type ( sandev, ix86 );
break;
case INT13_EXTENSION_CHECK:
- status = int13_extension_check ( int13, ix86 );
+ status = int13_extension_check ( sandev, ix86 );
break;
case INT13_EXTENDED_READ:
- status = int13_extended_read ( int13, ix86 );
+ status = int13_extended_read ( sandev, ix86 );
break;
case INT13_EXTENDED_WRITE:
- status = int13_extended_write ( int13, ix86 );
+ status = int13_extended_write ( sandev, ix86 );
break;
case INT13_EXTENDED_VERIFY:
- status = int13_extended_verify ( int13, ix86 );
+ status = int13_extended_verify ( sandev, ix86 );
break;
case INT13_EXTENDED_SEEK:
- status = int13_extended_seek ( int13, ix86 );
+ status = int13_extended_seek ( sandev, ix86 );
break;
case INT13_GET_EXTENDED_PARAMETERS:
- status = int13_get_extended_parameters ( int13, ix86 );
+ status = int13_get_extended_parameters ( sandev, ix86 );
break;
case INT13_CDROM_STATUS_TERMINATE:
- status = int13_cdrom_status_terminate ( int13, ix86 );
+ status = int13_cdrom_status_terminate ( sandev, ix86 );
break;
case INT13_CDROM_READ_BOOT_CATALOG:
- status = int13_cdrom_read_boot_catalog ( int13, ix86 );
+ status = int13_cdrom_read_boot_catalog ( sandev, ix86 );
break;
default:
- DBGC2 ( int13, "*** Unrecognised INT13 ***\n" );
+ DBGC2 ( sandev, "*** Unrecognised INT13 ***\n" );
status = -INT13_STATUS_INVALID;
break;
}
/* Negative status indicates an error */
if ( status < 0 ) {
status = -status;
- DBGC ( int13, "INT13,%02x (%02x) failed with status "
- "%02x\n", ix86->regs.ah, int13->drive, status );
+ DBGC ( sandev, "INT13,%02x (%02x) failed with status "
+ "%02x\n", ix86->regs.ah, sandev->drive, status );
} else {
ix86->flags &= ~CF;
}
}
/**
- * Check INT13 emulated drive flow control window
- *
- * @v int13 Emulated drive
- */
-static size_t int13_block_window ( struct int13_drive *int13 __unused ) {
-
- /* We are never ready to receive data via this interface.
- * This prevents objects that support both block and stream
- * interfaces from attempting to send us stream data.
- */
- return 0;
-}
-
-/**
- * Handle INT 13 emulated drive underlying block device closing
- *
- * @v int13 Emulated drive
- * @v rc Reason for close
- */
-static void int13_block_close ( struct int13_drive *int13, int rc ) {
-
- /* Any closing is an error from our point of view */
- if ( rc == 0 )
- rc = -ENOTCONN;
-
- DBGC ( int13, "INT13 drive %02x went away: %s\n",
- int13->drive, strerror ( rc ) );
-
- /* Record block device error code */
- int13->block_rc = rc;
-
- /* Shut down interfaces */
- intf_restart ( &int13->block, rc );
-}
-
-/** INT 13 drive interface operations */
-static struct interface_operation int13_block_op[] = {
- INTF_OP ( xfer_window, struct int13_drive *, int13_block_window ),
- INTF_OP ( intf_close, struct int13_drive *, int13_block_close ),
-};
-
-/** INT 13 drive interface descriptor */
-static struct interface_descriptor int13_block_desc =
- INTF_DESC ( struct int13_drive, block, int13_block_op );
-
-/**
- * Free INT 13 emulated drive
- *
- * @v refcnt Reference count
- */
-static void int13_free ( struct refcnt *refcnt ) {
- struct int13_drive *int13 =
- container_of ( refcnt, struct int13_drive, refcnt );
-
- uri_put ( int13->uri );
- free ( int13 );
-}
-
-/**
- * Hook INT 13 emulated drive
+ * Hook INT 13 SAN device
*
* @v uri URI
* @v drive Drive number
* the INT 13 interrupt vector (if not already hooked).
*/
static int int13_hook ( struct uri *uri, unsigned int drive ) {
- struct int13_drive *int13;
+ struct san_device *sandev;
+ struct int13_data *int13;
unsigned int natural_drive;
void *scratch;
+ int need_hook = ( ! have_sandevs() );
int rc;
/* Calculate natural drive number */
if ( ( drive & 0x7f ) == 0x7f )
drive = natural_drive;
- /* Check that drive number is not in use */
- list_for_each_entry ( int13, &int13s, list ) {
- if ( int13->drive == drive ) {
- rc = -EADDRINUSE;
- goto err_in_use;
- }
- }
-
- /* Allocate and initialise structure */
- int13 = zalloc ( sizeof ( *int13 ) );
- if ( ! int13 ) {
+ /* Allocate SAN device */
+ sandev = alloc_sandev ( uri, sizeof ( *int13 ) );
+ if ( ! sandev ) {
rc = -ENOMEM;
- goto err_zalloc;
+ goto err_alloc;
}
- ref_init ( &int13->refcnt, int13_free );
- intf_init ( &int13->block, &int13_block_desc, &int13->refcnt );
- int13->uri = uri_get ( uri );
- int13->drive = drive;
+ sandev->drive = drive;
+ int13 = sandev->priv;
int13->natural_drive = natural_drive;
- /* Open block device interface */
- if ( ( rc = int13_reopen_block ( int13 ) ) != 0 )
- goto err_reopen_block;
-
- /* Read device capacity */
- if ( ( rc = int13_read_capacity ( int13 ) ) != 0 )
- goto err_read_capacity;
+ /* Register SAN device */
+ if ( ( rc = register_sandev ( sandev ) ) != 0 ) {
+ DBGC ( sandev, "INT13 drive %02x could not register: %s\n",
+ sandev->drive, strerror ( rc ) );
+ goto err_register;
+ }
/* Allocate scratch area */
- scratch = malloc ( int13_blksize ( int13 ) );
+ scratch = malloc ( sandev_blksize ( sandev ) );
if ( ! scratch )
goto err_alloc_scratch;
/* Parse parameters, if present */
- if ( ( rc = int13_parse_iso9660 ( int13, scratch ) ) != 0 )
- goto err_parse_iso9660;
+ if ( sandev->is_cdrom &&
+ ( ( rc = int13_parse_eltorito ( sandev, scratch ) ) != 0 ) )
+ goto err_parse_eltorito;
- /* Give drive a default geometry */
- if ( ( rc = int13_guess_geometry ( int13, scratch ) ) != 0 )
+ /* Give drive a default geometry, if applicable */
+ if ( ( sandev_blksize ( sandev ) == INT13_BLKSIZE ) &&
+ ( ( rc = int13_guess_geometry ( sandev, scratch ) ) != 0 ) )
goto err_guess_geometry;
- DBGC ( int13, "INT13 drive %02x (naturally %02x) registered with C/H/S "
- "geometry %d/%d/%d\n", int13->drive, int13->natural_drive,
- int13->cylinders, int13->heads, int13->sectors_per_track );
+ DBGC ( sandev, "INT13 drive %02x (naturally %02x) registered with "
+ "C/H/S geometry %d/%d/%d\n",
+ sandev->drive, int13->natural_drive, int13->cylinders,
+ int13->heads, int13->sectors_per_track );
/* Hook INT 13 vector if not already hooked */
- if ( list_empty ( &int13s ) ) {
+ if ( need_hook ) {
int13_hook_vector();
devices_get();
}
- /* Add to list of emulated drives */
- list_add ( &int13->list, &int13s );
-
/* Update BIOS drive count */
int13_sync_num_drives();
return drive;
err_guess_geometry:
- err_parse_iso9660:
+ err_parse_eltorito:
free ( scratch );
err_alloc_scratch:
- err_read_capacity:
- err_reopen_block:
- intf_shutdown ( &int13->block, rc );
- ref_put ( &int13->refcnt );
- err_zalloc:
- err_in_use:
+ unregister_sandev ( sandev );
+ err_register:
+ sandev_put ( sandev );
+ err_alloc:
return rc;
}
/**
- * Find INT 13 emulated drive by drive number
- *
- * @v drive Drive number
- * @ret int13 Emulated drive, or NULL
- */
-static struct int13_drive * int13_find ( unsigned int drive ) {
- struct int13_drive *int13;
-
- list_for_each_entry ( int13, &int13s, list ) {
- if ( int13->drive == drive )
- return int13;
- }
- return NULL;
-}
-
-/**
- * Unhook INT 13 emulated drive
+ * Unhook INT 13 SAN device
*
* @v drive Drive number
*
* Unregisters the drive from the INT 13 emulation subsystem. If this
- * is the last emulated drive, the INT 13 vector is unhooked (if
+ * is the last SAN device, the INT 13 vector is unhooked (if
* possible).
*/
static void int13_unhook ( unsigned int drive ) {
- struct int13_drive *int13;
+ struct san_device *sandev;
/* Find drive */
- int13 = int13_find ( drive );
- if ( ! int13 ) {
- DBG ( "INT13 cannot find emulated drive %02x\n", drive );
+ sandev = sandev_find ( drive );
+ if ( ! sandev ) {
+ DBG ( "INT13 cannot find drive %02x\n", drive );
return;
}
- /* Shut down interfaces */
- intf_shutdown ( &int13->block, 0 );
-
- /* Remove from list of emulated drives */
- list_del ( &int13->list );
+ /* Unregister SAN device */
+ unregister_sandev ( sandev );
/* Should adjust BIOS drive count, but it's difficult
* to do so reliably.
*/
- DBGC ( int13, "INT13 drive %02x unregistered\n", int13->drive );
+ DBGC ( sandev, "INT13 drive %02x unregistered\n", sandev->drive );
/* Unhook INT 13 vector if no more drives */
- if ( list_empty ( &int13s ) ) {
+ if ( ! have_sandevs() ) {
devices_put();
int13_unhook_vector();
}
- /* Drop list's reference to drive */
- ref_put ( &int13->refcnt );
+ /* Drop reference to drive */
+ sandev_put ( sandev );
}
/**
#define xbftab __use_data16 ( xbftab )
/**
- * Describe INT 13 emulated drive for SAN-booted operating system
+ * Describe SAN device for SAN-booted operating system
*
* @v drive Drive number
* @ret rc Return status code
*/
static int int13_describe ( unsigned int drive ) {
- struct int13_drive *int13;
+ struct san_device *sandev;
struct segoff xbft_address;
int rc;
/* Find drive */
- int13 = int13_find ( drive );
- if ( ! int13 ) {
- DBG ( "INT13 cannot find emulated drive %02x\n", drive );
+ sandev = sandev_find ( drive );
+ if ( ! sandev ) {
+ DBG ( "INT13 cannot find drive %02x\n", drive );
return -ENODEV;
}
/* Reopen block device if necessary */
- if ( ( int13->block_rc != 0 ) &&
- ( ( rc = int13_reopen_block ( int13 ) ) != 0 ) )
+ if ( sandev_needs_reopen ( sandev ) &&
+ ( ( rc = sandev_reopen ( sandev ) ) != 0 ) )
return rc;
/* Clear table */
sizeof ( xbftab.acpi.oem_table_id ) );
/* Fill in remaining parameters */
- if ( ( rc = acpi_describe ( &int13->block, &xbftab.acpi,
+ if ( ( rc = acpi_describe ( &sandev->block, &xbftab.acpi,
sizeof ( xbftab ) ) ) != 0 ) {
- DBGC ( int13, "INT13 drive %02x could not create ACPI "
- "description: %s\n", int13->drive, strerror ( rc ) );
+ DBGC ( sandev, "INT13 drive %02x could not create ACPI "
+ "description: %s\n", sandev->drive, strerror ( rc ) );
return rc;
}
acpi_fix_checksum ( &xbftab.acpi );
xbft_address.segment = rm_ds;
xbft_address.offset = __from_data16 ( &xbftab );
- DBGC ( int13, "INT13 drive %02x described using boot firmware "
- "table:\n", int13->drive );
- DBGC_HDA ( int13, xbft_address, &xbftab,
+ DBGC ( sandev, "INT13 drive %02x described using boot firmware "
+ "table:\n", sandev->drive );
+ DBGC_HDA ( sandev, xbft_address, &xbftab,
le32_to_cpu ( xbftab.acpi.length ) );
return 0;
projects / thirdparty / ipxe.git / commitdiff
