[PATCH v2 0/6] libsas and drivers: NCQ error handling

[John Garry <john.garry@huawei.com>]

As reported in [0], the pm8001 driver NCQ error handling more or less
duplicates what libata does in link error handling, as follows:
- abort all commands
- do autopsy with read log ext 10 command
- reset the target to recover

Indeed for the hisi_sas driver we want to add similar handling for NCQ
errors.

This series add a new libsas API - sas_ata_device_link_abort() - to handle
host NCQ errors, and fixes up pm8001 and hisi_sas drivers to use it. As
mentioned in the pm8001 changeover patch, I would prefer a better place to
locate the SATA ABORT command (rather that nexus reset callback).

Damien kindly tested the v1 series for pm8001, but any further pm8001
testing would be appreciated as I have since tweaked
sas_ata_device_link_abort(). This is because the pm8001 driver hangs on my
arm64 machine read log ext10 command.

Finally with these changes we can make the libsas task alloc/free APIs
private, which they should always have been.

Based on v6.0-rc1

[0] https://lore.kernel.org/linux-scsi/8fb3b093-55f0-1fab-81f4-e8519810a978@huawei.com/

Changes since v1:
- Rename sas_ata_link_abort() -> sas_ata_device_link_abort()
- Set EH RESET flag in sas_ata_device_link_abort()
- Add Jack's Ack tags
- Rebase

John Garry (5):
  scsi: pm8001: Modify task abort handling for SATA task
  scsi: libsas: Add sas_ata_device_link_abort()
  scsi: pm8001: Use sas_ata_device_link_abort() to handle NCQ errors
  scsi: hisi_sas: Don't issue ATA softreset in hisi_sas_abort_task()
  scsi: libsas: Make sas_{alloc, alloc_slow, free}_task() private

Xingui Yang (1):
  scsi: hisi_sas: Add SATA_DISK_ERR bit handling for v3 hw

 drivers/scsi/hisi_sas/hisi_sas_main.c  |   5 +-
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |  22 ++-
 drivers/scsi/libsas/sas_ata.c          |  11 ++
 drivers/scsi/libsas/sas_init.c         |   3 -
 drivers/scsi/libsas/sas_internal.h     |   4 +
 drivers/scsi/pm8001/pm8001_hwi.c       | 194 +++++++------------------
 drivers/scsi/pm8001/pm8001_sas.c       |  13 ++
 drivers/scsi/pm8001/pm8001_sas.h       |   8 +-
 drivers/scsi/pm8001/pm80xx_hwi.c       | 177 ++--------------------
 include/scsi/libsas.h                  |   4 -
 include/scsi/sas_ata.h                 |   5 +
 11 files changed, 133 insertions(+), 313 deletions(-)

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2.35.3