On Mon, Mar 28, 2022 at 10:42 AM Ajish Koshy <Ajish.Koshy@xxxxxxxxxxxxx> wrote:
>
> Executing driver on servers with more than 32 CPUs were faced with command
> timeouts. This is because we were not geting completions for commands
> submitted on IQ32 - IQ63.
>
> Set E64Q bit to enable upper inbound and outbound queues 32 to 63 in the
> MPI main configuration table.
>
> Added 500ms delay after successful MPI initialization as mentioned in
> controller datasheet.
>
> Signed-off-by: Ajish Koshy <Ajish.Koshy@xxxxxxxxxxxxx>
> Signed-off-by: Viswas G <Viswas.G@xxxxxxxxxxxxx>
Please add
Fixes: 05c6c029a44d ("scsi: pm80xx: Increase number of supported
queues") so it will pickup
automatically by stable.
> ---
> drivers/scsi/pm8001/pm80xx_hwi.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
> index b92e82a576e3..f04c6c589615 100644
> --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> @@ -766,6 +766,10 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
> pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity = 0x01;
> pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt = 0x01;
>
> + /* Enable higher IQs and OQs, 32 to 63, bit 16*/
> + if (pm8001_ha->max_q_num > 32)
> + pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt |=
> + (1 << 16);
> /* Disable end to end CRC checking */
> pm8001_ha->main_cfg_tbl.pm80xx_tbl.crc_core_dump = (0x1 << 16);
>
> @@ -1027,6 +1031,9 @@ static int mpi_init_check(struct pm8001_hba_info *pm8001_ha)
> if (0x0000 != gst_len_mpistate)
> return -EBUSY;
>
> + /* Wait for 500ms after successful MPI initialization*/
> + msleep(500);
> +
> return 0;
> }
>
> --
> 2.31.1
>
