linux-kernel - Re: [PATCH v2 0/6] libsas and drivers: NCQ error handling

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Message-ID: <e1efeb1b-a876-a5c4-a8af-b30883c8457d@opensource.wdc.com>
Date:   Wed, 17 Aug 2022 08:52:57 -0700
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     John Garry <john.garry@...wei.com>, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, jinpu.wang@...ud.ionos.com,
        yangxingui@...wei.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxarm@...wei.com, hare@...e.de
Subject: Re: [PATCH v2 0/6] libsas and drivers: NCQ error handling

On 2022/08/17 7:52, John Garry wrote:
> 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.

I will run more tests with this series.

> 
> 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(-)
> 


-- 
Damien Le Moal
Western Digital Research