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rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Subject: Re: [PATCH 0/6] libsas and drivers: NCQ error handling Content-Language: en-US To: John Garry , jejb@linux.ibm.com, martin.petersen@oracle.com, jinpu.wang@cloud.ionos.com, yangxingui@huawei.com, chenxiang66@hisilicon.com, hare@suse.de Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org References: <1658489049-232850-1-git-send-email-john.garry@huawei.com> From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <1658489049-232850-1-git-send-email-john.garry@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org On 2022/07/22 4:24, 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_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). > > I would appreciate some testing of the pm8001 change as the read log ext10 > command mostly hangs on my arm64 machine - these arm64 hangs are a known > issue. I applied this series on top of the current Linus tree and ran some tests: a bunch of fio runs and also ran libzbc test suites on a SATA SMR drive as that generates many command failures. No problems detected, the tests all pass. FYI, messages for failed commands look like this: pm80xx0:: mpi_sata_event 2685: SATA EVENT 0x23 sas: Enter sas_scsi_recover_host busy: 1 failed: 1 sas: sas_scsi_find_task: aborting task 0x00000000ba62a907 pm80xx0:: mpi_sata_completion 2292: task null, freeing CCB tag 2 sas: sas_scsi_find_task: task 0x00000000ba62a907 is aborted sas: sas_eh_handle_sas_errors: task 0x00000000ba62a907 is aborted ata21.00: exception Emask 0x0 SAct 0x20000000 SErr 0x0 action 0x0 ata21.00: failed command: WRITE FPDMA QUEUED ata21.00: cmd 61/02:00:ff:ff:ea/00:00:02:00:00/40 tag 29 ncq dma 8192 out res 43/04:02:ff:ff:ea/00:00:02:00:00/00 Emask 0x400 (NCQ error) ata21.00: status: { DRDY SENSE ERR } ata21.00: error: { ABRT } ata21.00: configured for UDMA/133 ata21: EH complete sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 1 tries: 1 Seems all good to me. > > Finally with these changes we can make the libsas task alloc/free APIs > private, which they should always have been. > > Based on v5.19-rc6 > > [0] https://lore.kernel.org/linux-scsi/8fb3b093-55f0-1fab-81f4-e8519810a978@huawei.com/ > > John Garry (5): > scsi: pm8001: Modify task abort handling for SATA task > scsi: libsas: Add sas_ata_link_abort() > scsi: pm8001: Use sas_ata_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 | 10 ++ > 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, 132 insertions(+), 313 deletions(-) > -- Damien Le Moal Western Digital Research