On Mon, Oct 17, 2022 at 05:20:31PM +0800, John Garry wrote:
> From: Xingui Yang <yangxingui@xxxxxxxxxx>
>
> When an NCQ error occurs, the controller will abnormally complete the I/Os
> that are newly delivered to disk, and bit8 in CQ dw3 will be set which
> indicates that the SATA disk is in error state. The current processing flow
> is to set ts->stat to SAS_OPEN_REJECT and then sas_ata_task_done() will
> set FIS stat to ATA_ERR. After analyzing the IO by ata_eh_analyze_tf(),
> err_mask will set to AC_ERR_HSM. If media error occurs for four times
> within 10 minutes and the chip rejects new I/Os for four times, NCQ will
> be disabled due to excessive errors, which is undesirable.
With patch 8/8 in this series, will it still set err_mask to AC_ERR_HSM?
If not, is this patch still needed with patch 8/8?
Kind regards,
Niklas
>
> Therefore, use sas_task_abort() to handle abnormally completed I/Os when
> SATA disk is in error state, as these abnormally completed I/Os are already
> processed by sas_ata_device_link_abort() and qc->flag are set to
> ATA_QCFLAG_FAILED. If sas_task_abort() is used, qc->err_mask will not be
> modified in EH. Unlike the current process flow, it will not increase
> the count of ECAT_TOUT_HSM and not turn off NCQ. Like other I/Os on the
> disk that do not have an error but do not return after the NCQ error, they
> are retried after the EH.
>
> Signed-off-by: Xingui Yang <yangxingui@xxxxxxxxxx>
> Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
> ---
> drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> index 0ae8a60aaf93..0c3fcb807806 100644
> --- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> +++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
> @@ -428,6 +428,8 @@
> #define CMPLT_HDR_DEV_ID_OFF 16
> #define CMPLT_HDR_DEV_ID_MSK (0xffff << CMPLT_HDR_DEV_ID_OFF)
> /* dw3 */
> +#define SATA_DISK_IN_ERROR_STATUS_OFF 8
> +#define SATA_DISK_IN_ERROR_STATUS_MSK (0x1 << SATA_DISK_IN_ERROR_STATUS_OFF)
> #define CMPLT_HDR_SATA_DISK_ERR_OFF 16
> #define CMPLT_HDR_SATA_DISK_ERR_MSK (0x1 << CMPLT_HDR_SATA_DISK_ERR_OFF)
> #define CMPLT_HDR_IO_IN_TARGET_OFF 17
> @@ -2219,7 +2221,8 @@ slot_err_v3_hw(struct hisi_hba *hisi_hba, struct sas_task *task,
> } else if (dma_rx_err_type & RX_DATA_LEN_UNDERFLOW_MSK) {
> ts->residual = trans_tx_fail_type;
> ts->stat = SAS_DATA_UNDERRUN;
> - } else if (dw3 & CMPLT_HDR_IO_IN_TARGET_MSK) {
> + } else if ((dw3 & CMPLT_HDR_IO_IN_TARGET_MSK) ||
> + (dw3 & SATA_DISK_IN_ERROR_STATUS_MSK)) {
> ts->stat = SAS_PHY_DOWN;
> slot->abort = 1;
> } else {
> --
> 2.35.3
>
