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authorMark Lord <liml@rtr.ca>2007-03-16 10:22:26 -0400
committerJeff Garzik <jeff@garzik.org>2007-04-28 14:16:01 -0400
commit5a5dbd18a7496ed403f6f54bb20c955c65482fa5 (patch)
tree031eec40ab42ac4ab04e59db539b8126ac31fb6d /include/linux
parent1234010684bb9cde51125ec3d1c71054a9f24f47 (diff)
libata: add support for READ/WRITE LONG
The READ/WRITE LONG commands are theoretically obsolete, but the majority of drives in existance still implement them. The WRITE_LONG and WRITE_LONG_ONCE commands are of particular interest for fault injection testing -- eg. creating "media errors" at specific locations on a disk. The fussy bit is that these commands require a non-standard sector size, usually 520 bytes instead of 512. This patch adds support to libata for READ/WRITE LONG commands issued via SG_IO/ATA_16. Signed-off-by: Mark Lord <mlord@pobox.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/ata.h6
-rw-r--r--include/linux/libata.h2
2 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 6caeb98e29d..ffb6cdc5010 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -164,6 +164,12 @@ enum {
/* READ_LOG_EXT pages */
ATA_LOG_SATA_NCQ = 0x10,
+ /* READ/WRITE LONG (obsolete) */
+ ATA_CMD_READ_LONG = 0x22,
+ ATA_CMD_READ_LONG_ONCE = 0x23,
+ ATA_CMD_WRITE_LONG = 0x32,
+ ATA_CMD_WRITE_LONG_ONCE = 0x33,
+
/* SETFEATURES stuff */
SETFEATURES_XFER = 0x03,
XFER_UDMA_7 = 0x47,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5a40a8d9511..12237d4b9f9 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -427,6 +427,7 @@ struct ata_queued_cmd {
int dma_dir;
unsigned int pad_len;
+ unsigned int sect_size;
unsigned int nbytes;
unsigned int curbytes;
@@ -1182,6 +1183,7 @@ static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
qc->n_elem = 0;
qc->err_mask = 0;
qc->pad_len = 0;
+ qc->sect_size = ATA_SECT_SIZE;
ata_tf_init(qc->dev, &qc->tf);