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Added generic asynchronous operations code.

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Removed data_in_len and data_out_len from ata_command structure; the
lengths are implied by the sector count and the presence of the data_in
or data_out pointers.

Changed AoE code to use subcommands by default, and made aoe_issue()
nonblocking (with completion via async_wait()).
This commit is contained in:
Michael Brown
2006-05-31 14:34:17 +00:00
parent 73a449e96b
commit 68125bc441
6 changed files with 166 additions and 122 deletions
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9
src/drivers/block/ata.c
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@@ -18,6 +18,7 @@
#include <stddef.h>
#include <string.h>
#include <assert.h>
#include <byteswap.h>
#include <gpxe/blockdev.h>
#include <gpxe/ata.h>
@@ -73,7 +74,6 @@ static int ata_read ( struct block_device *blockdev, uint64_t block,
command.cb.device |= command.cb.lba.bytes.low_prev;
command.cb.cmd_stat = ( ata->lba48 ? ATA_CMD_READ_EXT : ATA_CMD_READ );
command.data_in = buffer;
command.data_in_len = ( count * blockdev->blksize );
return ata_command ( ata, &command );
}
@@ -101,7 +101,6 @@ static int ata_write ( struct block_device *blockdev, uint64_t block,
command.cb.cmd_stat = ( ata->lba48 ?
ATA_CMD_WRITE_EXT : ATA_CMD_WRITE );
command.data_out = buffer;
command.data_out_len = ( count * blockdev->blksize );
return ata_command ( ata, &command );
}
@@ -119,12 +118,12 @@ static int ata_identify ( struct block_device *blockdev ) {
/* Issue IDENTIFY */
memset ( &command, 0, sizeof ( command ) );
command.cb.count.native = 1; /* n/a according to spec, but at least
* AoE vblade devices require it. */
command.cb.count.native = 1;
command.cb.device = ( ata->device | ATA_DEV_OBSOLETE | ATA_DEV_LBA );
command.cb.cmd_stat = ATA_CMD_IDENTIFY;
command.data_in = virt_to_user ( &identity );
command.data_in_len = sizeof ( identity );
linker_assert ( sizeof ( identity ) == ATA_SECTOR_SIZE,
__ata_identity_bad_size__ );
if ( ( rc = ata_command ( ata, &command ) ) != 0 )
return rc;