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| author | Michael Brown | 2010-10-16 14:53:38 +0200 |
|---|---|---|
| committer | Michael Brown | 2010-10-19 20:10:02 +0200 |
| commit | 57bab0ae4a1fd4241017a4a4a90d933c91d7fda8 (patch) | |
| tree | cc173ecfb34e5ecefd800bb39a5259b9f8e178bb /src/include/ipxe/scsi.h | |
| parent | [fc] Do not use the command reference number in FCP_CMND IUs (diff) | |
| download | ipxe-57bab0ae4a1fd4241017a4a4a90d933c91d7fda8.tar.gz ipxe-57bab0ae4a1fd4241017a4a4a90d933c91d7fda8.tar.xz ipxe-57bab0ae4a1fd4241017a4a4a90d933c91d7fda8.zip | |
[scsi] Wait for a successful TEST UNIT READY command
Some SCSI targets (observed with an EMC CLARiiON Fibre Channel target)
will not respond to commands correctly until a TEST UNIT READY has
been issued. In particular, a READ CAPACITY (10) command will return
with a success status, but no capacity data.
Fix by issuing a TEST UNIT READY command automatically, and delaying
further SCSI commands until the TEST UNIT READY has succeeded.
Reported-by: Hadar Hen Zion <hadarh@mellanox.co.il>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/scsi.h')
| -rw-r--r-- | src/include/ipxe/scsi.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/include/ipxe/scsi.h b/src/include/ipxe/scsi.h index 5539b61d..6dfb7f1e 100644 --- a/src/include/ipxe/scsi.h +++ b/src/include/ipxe/scsi.h @@ -28,6 +28,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define SCSI_OPCODE_READ_CAPACITY_10 0x25 /**< READ CAPACITY (10) */ #define SCSI_OPCODE_SERVICE_ACTION_IN 0x9e /**< SERVICE ACTION IN */ #define SCSI_SERVICE_ACTION_READ_CAPACITY_16 0x10 /**< READ CAPACITY (16) */ +#define SCSI_OPCODE_TEST_UNIT_READY 0x00 /**< TEST UNIT READY */ /** @} */ @@ -192,6 +193,16 @@ struct scsi_capacity_16 { uint8_t reserved[20]; } __attribute__ (( packed )); +/** A SCSI "TEST UNIT READY" CDB */ +struct scsi_cdb_test_unit_ready { + /** Opcode (0x00) */ + uint8_t opcode; + /** Reserved */ + uint8_t reserved[4]; + /** Control byte */ + uint8_t control; +} __attribute__ (( packed )); + /** A SCSI Command Data Block */ union scsi_cdb { struct scsi_cdb_read_10 read10; @@ -200,6 +211,7 @@ union scsi_cdb { struct scsi_cdb_write_16 write16; struct scsi_cdb_read_capacity_10 readcap10; struct scsi_cdb_read_capacity_16 readcap16; + struct scsi_cdb_test_unit_ready testready; unsigned char bytes[16]; }; |