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Subject[PATCH v6 0/8] libsas and drivers: NCQ error handling
Date
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, if necessary

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.

A difference in the pm8001 driver NCQ error handling is that we send
SATA_ABORT per-task prior to read log ext10, but I feel that this should
not make a difference to the error handling.

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

Based on v6.1-rc1

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

Changes since v5:
- Change to set ATA_DRDY in sata dev fis for sas_ata_device_link_abort()
and sas_ata_task_done()
- Add Niklas' tags (thanks!)
- Rebase

Changes since v4:
- Add Jason's tags (thanks)
- Rebase

Changes since v3:
- Add Damien's tags (thanks)
- Modify hisi_sas processing as follows:
- use sas_task_abort() for rejected IO
- Modify abort task processing to issue softreset in certain circumstances
- rebase

Changes since v2:
- Stop sending SATA_ABORT all for pm8001 handling
- Make "reset" optional in sas_ata_device_link_abort()
- Drop Jack's ACK

John Garry (6):
scsi: libsas: Add sas_ata_device_link_abort()
scsi: hisi_sas: Move slot variable definition in hisi_sas_abort_task()
scsi: pm8001: Modify task abort handling for SATA task
scsi: pm8001: Use sas_ata_device_link_abort() to handle NCQ errors
scsi: libsas: Make sas_{alloc, alloc_slow, free}_task() private
scsi: libsas: Update SATA dev FIS in sas_ata_task_done()

Xingui Yang (2):
scsi: hisi_sas: Add SATA_DISK_ERR bit handling for v3 hw
scsi: hisi_sas: Modify v3 HW SATA disk error state completion
processing

drivers/scsi/hisi_sas/hisi_sas.h | 1 +
drivers/scsi/hisi_sas/hisi_sas_main.c | 26 +++-
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 53 ++++++-
drivers/scsi/libsas/sas_ata.c | 19 ++-
drivers/scsi/libsas/sas_init.c | 3 -
drivers/scsi/libsas/sas_internal.h | 4 +
drivers/scsi/pm8001/pm8001_hwi.c | 186 ++++---------------------
drivers/scsi/pm8001/pm8001_sas.c | 14 +-
drivers/scsi/pm8001/pm8001_sas.h | 5 -
drivers/scsi/pm8001/pm80xx_hwi.c | 177 +++--------------------
include/scsi/libsas.h | 4 -
include/scsi/sas_ata.h | 6 +
12 files changed, 148 insertions(+), 350 deletions(-)

--
2.35.3

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