linux-toradex.git/include/linux/ata.h, branch v4.14-rc5

libata: check for trusted computing in IDENTIFY DEVICE data

2017-08-29T15:33:24+00:00

ATA-8 and later mirrors the TRUSTED COMPUTING SUPPORTED bit in word 48 of
the IDENTIFY DEVICE data.  Check this before issuing a READ LOG PAGE
command to avoid issues with buggy devices.  The only downside is that
we can't support Security Send / Receive for a device with an older
revision due to the conflicting use of this field in earlier
specifications.

tj: The reason we need this is because some devices which don't
    support READ LOG PAGE lock up after getting issued that command.

Signed-off-by: Christoph Hellwig 
Tested-by: David Ahern 
Signed-off-by: Tejun Heo

libata: implement SECURITY PROTOCOL IN/OUT

2017-06-05T19:29:22+00:00

This allows us to use the generic OPAL code with ATA devices.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

libata: clarify log page naming / grouping

2017-06-05T19:29:21+00:00

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

ata: update references for libata documentation

2017-05-16T15:25:59+00:00

The libata documentation is now using ReST. Update references
to it to point to the new place.

Signed-off-by: Mauro Carvalho Chehab 
Acked-by: Bartlomiej Zolnierkiewicz 
Signed-off-by: Tejun Heo

libata: remove SCT WRITE SAME support

2017-04-28T22:09:59+00:00

This was already disabled a while ago because it caused I/O errors,
and it's severly getting into the way of the discard / write zeroes
rework.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Signed-off-by: Tejun Heo

ata: Enabling ATA Command Priorities

2016-10-19T18:34:36+00:00

This patch checks to see if an ATA device supports NCQ command priorities.
If so and the user has specified an iocontext that indicates
IO_PRIO_CLASS_RT then we build a tf with a high priority command.

This is done to improve the tail latency of commands that are high
priority by passing priority to the device.

tj: Removed trivial ata_ncq_prio_enabled() and open-coded the test.

Signed-off-by: Adam Manzanares 
Signed-off-by: Tejun Heo

libata: Add support for SCT Write Same

2016-08-25T15:26:48+00:00

SATA drives may support write same via SCT. This is useful
for setting the drive contents to a specific pattern (0's).

Translate a SCSI WRITE SAME 16 command to be either a DSM TRIM
command or an SCT Write Same command.

Based on the UNMAP flag:
  - When set translate to DSM TRIM
  - When not set translate to SCT Write Same

Signed-off-by: Shaun Tancheff 
Reviewed-by: Hannes Reinecke 
Acked-by: Tejun Heo

libata: Safely overwrite attached page in WRITE SAME xlat

2016-08-25T15:26:48+00:00

Safely overwriting the attached page to ATA format from the SCSI formatted
variant.

Signed-off-by: Shaun Tancheff 
Reviewed-by: Hannes Reinecke 
Acked-by: Tejun Heo

ata: define ATA_PROT_* in terms of ATA_PROT_FLAG_*

2016-07-19T00:55:38+00:00

This avoid the need to always translate between the two in ata_prot_flags
and generally cleans up the taskfile protocol usage.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Tejun Heo

ata: make lba_{28,48}_ok() use ATA_MAX_SECTORS{,_LBA48}

2016-07-18T22:25:00+00:00

Since we set ATA_MAX_SECTORS_LBA48 to 65535 to avoid the corner case
in some drives that commands with "count" set to 0000h (which
reprsents 65536) does not work as expected, lba_48_ok(), which is
used for number-of-blocks checking when libata pack commands, should
use the same limit as well. In fact, there is no reason for the two
functions not to use the macros anyway.

Signed-off-by: Tom Yan 
Signed-off-by: Tejun Heo