aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/libata.h
diff options
context:
space:
mode:
authorTejun Heo <htejun@gmail.com>2007-11-27 19:43:40 +0900
committerJeff Garzik <jeff@garzik.org>2008-01-23 05:24:11 -0500
commit70cd071e4ecc06c985189665af75c108601fd5a3 (patch)
treef28aae811d01f8ef44f27e5d469fe330ff834980 /include/linux/libata.h
parent6357357cae7794dcb89cace758108dec612e7ed5 (diff)
libata: clean up xfermode / PATA timing related stuff
* s/ATA_BITS_(PIO|MWDMA|UDMA)/ATA_NR_\1_MODES/g * Consistently use 0xff to indicate invalid transfer mode (0x00 is valid for PIO_SLOW). * Make ata_xfer_mode2mask() return proper mode mask instead of just the highest bit. * Sort ata_timing table in increasing xfermode order and update ata_timing_find_mode() accordingly. This patch doesn't introduce any behavior change. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r--include/linux/libata.h21
1 files changed, 12 insertions, 9 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 083dd77b120d..e2ed3bac8c5b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -269,17 +269,20 @@ enum {
/* encoding various smaller bitmaps into a single
* unsigned int bitmap
*/
- ATA_BITS_PIO = 7,
- ATA_BITS_MWDMA = 5,
- ATA_BITS_UDMA = 8,
+ ATA_NR_PIO_MODES = 7,
+ ATA_NR_MWDMA_MODES = 5,
+ ATA_NR_UDMA_MODES = 8,
ATA_SHIFT_PIO = 0,
- ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
- ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
-
- ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
- ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
- ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
+ ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
+ ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
+
+ ATA_MASK_PIO = ((1 << ATA_NR_PIO_MODES) - 1)
+ << ATA_SHIFT_PIO,
+ ATA_MASK_MWDMA = ((1 << ATA_NR_MWDMA_MODES) - 1)
+ << ATA_SHIFT_MWDMA,
+ ATA_MASK_UDMA = ((1 << ATA_NR_UDMA_MODES) - 1)
+ << ATA_SHIFT_UDMA,
/* size of buffer to pad xfers ending on unaligned boundaries */
ATA_DMA_PAD_SZ = 4,

Privacy Policy