[PATCH v8 0/7] NCQ Priority sysfs sttributes for libsas

[Igor Pylypiv]

This patch series adds ncq_prio_supported and ncq_prio_enable sysfs
attributes for libsas managed SATA devices. Existing libata sysfs
attributes cannot be used directly because the ata_port location is
different for libsas.

Changes since v7:
- Dropped the WARN_ON_ONCE(!dev_is_sata(ddev)) checks from sas_ncq_prio_*
  sysfs functions. The is_visible() callback hides the corresponding sysfs
  attributes from userspace for non-SATA devices.
- Added missing "Return" descriptions to ata_ncq_prio_* kdocs.
- Updated the commit message of the "ata: libata-sata: Factor out
  NCQ Priority configuration helpers" patch with the explanation
  why spin_lock_irq() was changed to spin_lock_irqsave().
- Restored blank lines between spin_unlock and return in ata_ncq_prio_*
  helpers.
- Updated the commit message of the hisi_sas patch to indicate that
  hisi_sas_v1_hw.c was not modified because v1 HW does not support SATA.

Changes since v6:
- Replaced sas_ata_sdev_attr_group definition with a macro for
  the "CONFIG_SCSI_SAS_ATA is not set" case. The macro defines
  an empty rvalue struct eliminating the variable definition.

Changes since v5:
- Added __maybe_unused attribute to sas_ata_sdev_attr_group to prevent
  an unused-const-variable warning when CONFIG_SCSI_SAS_ATA is not set.

Changes since v4:
- Updated sas_ncq_prio_* sysfs functions to use WARN_ON_ONCE() instead
  of WARN_ON().

Changes since v3:
- Changed ata_ncq_prio_supported() and ata_ncq_prio_enabled() to store
  the result into a boolean variable passed by address.
- Removed the "usable with both libsas and libata" wording from
  ata_ncq_prio_* helper's function comments.
- Removed the unlikely() in ata_ncq_prio_enable() because the function
  is not in a fastpath.
- Dropped hisi_sas v1 HW driver changes because it doesn't support SATA.

Changes since v2:
- Added libsas SATA sysfs attributes to aic94xx and isci.

Changes since v1:
- Dropped the "sas_" prefix to align sysfs sttributes naming with AHCI.
- Dropped ternary operators to make the code more readable.
- Corrected the formatting %u -> %d in sysfs_emit().
- Changed kstrtol() to kstrtobool() in [ata|sas]_ncq_prio_enable_store().
- Changed comments to use the "/* */" style instead of "//".
- Added libsas SATA sysfs attributes to mvsas and hisi_sas.
- Dropped the 'Reviewed-by' tags because they were not sent in-reply
  to the patch emails.

Igor Pylypiv (7):
  ata: libata-sata: Factor out NCQ Priority configuration helpers
  scsi: libsas: Define NCQ Priority sysfs attributes for SATA devices
  scsi: pm80xx: Add libsas SATA sysfs attributes group
  scsi: mvsas: Add libsas SATA sysfs attributes group
  scsi: hisi_sas: Add libsas SATA sysfs attributes group
  scsi: aic94xx: Add libsas SATA sysfs attributes group
  scsi: isci: Add libsas SATA sysfs attributes group

 drivers/ata/libata-sata.c              | 160 +++++++++++++++++++------
 drivers/scsi/aic94xx/aic94xx_init.c    |   8 ++
 drivers/scsi/hisi_sas/hisi_sas_v2_hw.c |   6 +
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |   6 +
 drivers/scsi/isci/init.c               |   6 +
 drivers/scsi/libsas/sas_ata.c          |  82 +++++++++++++
 drivers/scsi/mvsas/mv_init.c           |   7 ++
 drivers/scsi/pm8001/pm8001_ctl.c       |   5 +
 drivers/scsi/pm8001/pm8001_init.c      |   1 +
 drivers/scsi/pm8001/pm8001_sas.h       |   1 +
 include/linux/libata.h                 |   6 +
 include/scsi/sas_ata.h                 |   6 +
 12 files changed, 256 insertions(+), 38 deletions(-)

-- 
2.44.0.278.ge034bb2e1d-goog