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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/7/22 00:08, 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, 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. > > Damien kindly tested previous the series for pm8001, but any further pm8001 > testing would be appreciated as I have since tweaked pm8001 handling again. > This is because the pm8001 driver hangs on my arm64 machine read log ext10 > command. I tested this series on top of the current Linus tree. All look good. As ususal, I hammered an SMR drive connected to a pm80xx adapter and generated lots of invalid commands to check EH. No issues that I can see. E.g., an unaligned write error look like this: [ 5384.194853] pm80xx0:: mpi_sata_event 2685: SATA EVENT 0x23 [ 5384.238720] sas: Enter sas_scsi_recover_host busy: 1 failed: 1 [ 5384.246171] sas: sas_scsi_find_task: aborting task 0x0000000050be2a4b [ 5384.254654] pm80xx0:: mpi_sata_completion 2292: task null, freeing CCB tag 2 [ 5384.254676] sas: sas_scsi_find_task: task 0x0000000050be2a4b is aborted [ 5384.294659] sas: sas_eh_handle_sas_errors: task 0x0000000050be2a4b is aborted [ 5384.318691] ata22.00: exception Emask 0x0 SAct 0x200000 SErr 0x0 action 0x0 [ 5384.328425] ata22.00: failed command: WRITE FPDMA QUEUED [ 5384.336277] ata22.00: cmd 61/01:00:01:00:ea/00:00:02:00:00/40 tag 21 ncq dma 4096 out [ 5384.336277] res 43/04:01:01:00:ea/00:00:02:00:00/00 Emask 0x400 (NCQ error) [ 5384.357299] ata22.00: status: { DRDY SENSE ERR } [ 5384.364459] ata22.00: error: { ABRT } [ 5384.553177] ata22.00: configured for UDMA/133 [ 5384.560343] sd 19:0:3:0: [sdl] tag#80 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s [ 5384.572175] sd 19:0:3:0: [sdl] tag#80 Sense Key : Illegal Request [current] [ 5384.581765] sd 19:0:3:0: [sdl] tag#80 Add. Sense: Unaligned write command [ 5384.591126] sd 19:0:3:0: [sdl] tag#80 CDB: Write(16) 8a 00 00 00 00 00 02 ea 00 01 00 00 00 01 00 00 [ 5384.602938] I/O error, dev sdl, sector 391118856 op 0x1:(WRITE) flags 0x8800 phys_seg 1 prio class 2 [ 5384.613854] ata22: EH complete [ 5384.618570] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 1 tries: 1 So looks good to me. Feel free to add: Tested-by: Damien Le Moal > > Finally with these changes we can make the libsas task alloc/free APIs > private, which they should always have been. > > Based on v6.0-rc4 > > [0] https://lore.kernel.org/linux-scsi/8fb3b093-55f0-1fab-81f4-e8519810a978@huawei.com/ > > Changes since v2: > - Stop sending SATA_ABORT all for pm8001 handling > - Make "reset" optional in sas_ata_device_link_abort() > > 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 | 12 ++ > 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 | 8 ++ > drivers/scsi/pm8001/pm8001_sas.h | 4 - > drivers/scsi/pm8001/pm80xx_hwi.c | 177 +++-------------------- > include/scsi/libsas.h | 4 - > include/scsi/sas_ata.h | 6 + > 11 files changed, 96 insertions(+), 335 deletions(-) > -- Damien Le Moal Western Digital Research