linux-toradex.git/include/linux/ata.h, branch v2.6.36-rc5

libata-sff: prd is BMDMA specific

2010-05-19T17:38:54+00:00

struct ata_prd and ap->prd are BMDMA specific.  Add bmdma_ prefix to
them and move them inside CONFIG_ATA_SFF.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)

2010-04-08T16:53:57+00:00

Most drives from Seagate, Hitachi, and possibly other brands,
do not allow LBA28 access to sector number 0x0fffffff (2^28 - 1).
So instead use LBA48 for such accesses.

This bug could bite a lot of systems, especially when the user has
taken care to align partitions to 4KB boundaries. On misaligned systems,
it is less likely to be encountered, since a 4KB read would end at
0x10000000 rather than at 0x0fffffff.

Signed-off-by: Mark Lord 
Signed-off-by: Jeff Garzik

ata: Detect Delkin Devices compact flash

2010-03-01T20:11:32+00:00

I have a Delkin Devices compact flash card that isn't being recognized using the
SATA/PATA drivers.
The card is recognized and works with the deprecated ATA drivers.

The error I am seeing is:
ata1.00: failed to IDENTIFY (device reports invalid type, err_mask=0x0)

I tracked it down to ata_id_is_cfa() in include/linux/ata.h.
The Delkin card has id[0] set to 0x844a and id[83] set to 0.
This isn't what the kernel expects and is probably incorrect.

The simplest work-around is to add a check for 0x844a to ata_id_is_cfa().

Signed-off-by: Ben Gardner 
Signed-off-by: Jeff Garzik

libata: fix ata_id_logical_per_physical_sectors

2010-02-04T06:01:32+00:00

The value we get from the low byte of the ATA_ID_SECTOR_SIZE word is not not
a plain multiple, but the log of it, so fix the helper to give the correct
answer.  Without this we'll get an incorrect minimal I/O size in the block
limits VPD page for 4k sector drives.

Also change the return value of ata_id_logical_per_physical_sectors to u16
for the unlikely case of very large logical sectors.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jeff Garzik

libata: Clarify ata_set_lba_range_entries function

2009-12-03T23:01:23+00:00

ata_set_lba_range_entries used the variable max for two different things
which was confusing.  Make the function take a buffer size in bytes as
argument and return the used buffer size upon completion.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jeff Garzik

libata: Report zeroed read after TRIM and max discard size

2009-12-03T23:01:04+00:00

Our current TRIM payload is a single sector that can accommodate 64 *
65535 blocks being unmapped.  Report this value in the Block Limits
Maximum Unmap LBA count field.

If a storage device supports TRIM and the DRAT and RZAT bits are set,
report TPRZ=1 in Read Capacity(16).

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jeff Garzik

libata: add translation for SCSI WRITE SAME (aka TRIM support)

2009-12-03T07:46:35+00:00

Add support for the ATA TRIM command in libata.  We translate a WRITE SAME 16
command with the unmap bit set into an ATA TRIM command and export enough
information in READ CAPACITY 16 and the block limits EVPD page so that the new
SCSI layer discard support will driver this for us.

Note that I hardcode the WRITE_SAME_16 opcode for now as the patch to introduce
the symbolic is not in 2.6.32 yet but only in the SCSI tree - as soon as it is
merged we can fix it up to properly use the symbolic name.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jeff Garzik

libata: implement more acpi filtering options

2009-10-06T04:26:26+00:00

Currently libata-acpi can only filter DIPM among SATA feature enables
via _GTF.  This patch adds the capability to filter out FPDMA non-zero
offset, in-order guarantee and auto-activation.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: cosmetic updates

2009-10-06T04:25:03+00:00

We're about to add more SATA_* and ATA_ACPI_FILTER_* constants.
Reformat them in preparation.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: add command name parsing for error output

2009-09-01T23:47:20+00:00

This patch improve libata's output for error/notification messages
to allow easier comprehension and debugging:

When ATAPI commands issued through the SCSI layer fail, use SCSI
functions to print the CDB in human-readable form instead of just
dumping out the CDB in hex.

Print out the name of the failed command (as defined by the ATA
specification) in error handling output along with the raw register
contents.

When reporting status of ACPI taskfile commands executed on resume,
also output the names of the commands being executed (or not) in
readable form.

Since the extra data for printing command names increases kernel
size slightly, a config option has been added to allow disabling
command name output (as well as some of the error register parsing)
for those highly sensitive to kernel text size.

Signed-off-by: Robert Hancock 
Signed-off-by: Jeff Garzik