linux-toradex.git/include/linux/ata.h, branch v4.11-rc3

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

ata: Handle ATA NCQ NO-DATA commands correctly

2016-07-15T12:08:13+00:00

Add a new taskfile protocol ATA_PROT_NCQ_NODATA to handle
ATA NCQ NO-DATA commands correctly.
And fixup ata_scsi_zbc_out_xlat() to use it.

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

libata-scsi: avoid repeated calculation of number of TRIM ranges

2016-07-12T20:37:17+00:00

Currently libata statically allows only 1-block (512-byte) payload
for each TRIM command. Each payload can carry 64 TRIM ranges since
each range requires 8 bytes.

It is silly to keep doing the calculation (512 / 8) in different
places. Hence, define the new ATA_MAX_TRIM_RNUM for the result.

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

libata-scsi: fix SET FEATURES "filtering" for ata_msense_caching()

2016-07-12T14:52:49+00:00

Without this fix, the DRA bit of the caching mode page would not
be updated when the read look-ahead feature is toggled (e.g. with
`smartctl --set`), but will only be until, for example, the write
cache feature is touched.

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

Merge branch 'for-4.7-zac' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata

2016-05-24T00:53:39+00:00

Pull libata ZAC support from Tejun Heo:
 "This contains Zone ATA Command support for Shingled Magnetic Recording
  devices.

  In addition to sending the new commands down to the device, as ZAC
  commands depend on getting a lot of responses from the device, piping
  up responses is beefed up too.  However, it doesn't involve changes to
  libata core mechanism or its interaction with upper layers, so I'm not
  expecting too many fallouts.

  Kudos to Hannes for driving SMR support"

* 'for-4.7-zac' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (28 commits)
  libata: support host-aware and host-managed ZAC devices
  libata: support device-managed ZAC devices
  libata: NCQ encapsulation for ZAC MANAGEMENT OUT
  libata: Implement ZBC OUT translation
  libata: implement ZBC IN translation
  libata: fixup ZAC device disabling
  libata-scsi: Generate sense code for disabled devices
  libata-trace: decode subcommands
  libata: Check log page directory before accessing pages
  libata: Add command definitions for NCQ Encapsulation for READ LOG DMA EXT
  libata: Separate out ata_dev_config_ncq_send_recv()
  libata/libsas: Define ATA_CMD_NCQ_NON_DATA
  libsas: enable FPDMA SEND/RECEIVE
  libata: do not attempt to retrieve sense code twice
  libata-scsi: Set information sense field for invalid parameter
  libata-scsi: set bit pointer for sense code information
  libata-scsi: Set field pointer in sense code
  scsi: add scsi_set_sense_field_pointer()
  libata: Implement control mode page to select sense format
  libata-scsi: generate correct ATA pass-through sense
  ...

libata: support host-aware and host-managed ZAC devices

2016-05-09T16:36:46+00:00

Byte 69 bits 0:1 in the IDENTIFY DEVICE data indicate a
host-aware ZAC device.
Host-managed ZAC devices have their own individual signature,
and to not set the bits in the IDENTIFY DEVICE data.
And whenever we detect a ZAC-compatible device we should
be displaying the zoned block characteristics VPD page.

Signed-off-by: Hannes Reinecke 
Signed-off-by: Tejun Heo