Re: [PATCH 6/7] pm80xx: Reset PI and CI memory during re-initialize

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On Wed, Feb 24, 2021 at 4:48 PM Viswas G <Viswas.G@xxxxxxxxxxxxx> wrote:
>
> Producer index(PI) outbound queue and consumer index(CI)
> for Outbound queue are in DMA memory. These values should
> be reset to 0 during driver reinitialization.

Why "reinitialization", the function  init_default_table_values is
called from chip init?
>
> Signed-off-by: Viswas G <Viswas.G@xxxxxxxxxxxxx>
> Signed-off-by: Ruksar Devadi <Ruksar.devadi@xxxxxxxxxxxxx>
> Signed-off-by: Ashokkumar N <Ashokkumar.N@xxxxxxxxxxxxx>
> ---
>  drivers/scsi/pm8001/pm8001_hwi.c | 2 ++
>  drivers/scsi/pm8001/pm80xx_hwi.c | 2 ++
>  2 files changed, 4 insertions(+)
>
> diff --git a/drivers/scsi/pm8001/pm8001_hwi.c b/drivers/scsi/pm8001/pm8001_hwi.c
> index 4e0ce044ac69..783149b8b127 100644
> --- a/drivers/scsi/pm8001/pm8001_hwi.c
> +++ b/drivers/scsi/pm8001/pm8001_hwi.c
> @@ -240,6 +240,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
>                         pm8001_ha->memoryMap.region[ci_offset + i].phys_addr_lo;
>                 pm8001_ha->inbnd_q_tbl[i].ci_virt               =
>                         pm8001_ha->memoryMap.region[ci_offset + i].virt_ptr;
> +               pm8001_write_32(pm8001_ha->inbnd_q_tbl[i].ci_virt, 0, 0);
>                 offsetib = i * 0x20;
>                 pm8001_ha->inbnd_q_tbl[i].pi_pci_bar            =
>                         get_pci_bar_index(pm8001_mr32(addressib,
> @@ -268,6 +269,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
>                         0 | (10 << 16) | (i << 24);
>                 pm8001_ha->outbnd_q_tbl[i].pi_virt              =
>                         pm8001_ha->memoryMap.region[pi_offset + i].virt_ptr;
> +               pm8001_write_32(pm8001_ha->outbnd_q_tbl[i].pi_virt, 0, 0);
>                 offsetob = i * 0x24;
>                 pm8001_ha->outbnd_q_tbl[i].ci_pci_bar           =
>                         get_pci_bar_index(pm8001_mr32(addressob,
> diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
> index 1aa3a499c85a..0f2c57e054ac 100644
> --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> @@ -787,6 +787,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
>                         pm8001_ha->memoryMap.region[ci_offset + i].phys_addr_lo;
>                 pm8001_ha->inbnd_q_tbl[i].ci_virt               =
>                         pm8001_ha->memoryMap.region[ci_offset + i].virt_ptr;
> +               pm8001_write_32(pm8001_ha->inbnd_q_tbl[i].ci_virt, 0, 0);
>                 offsetib = i * 0x20;
>                 pm8001_ha->inbnd_q_tbl[i].pi_pci_bar            =
>                         get_pci_bar_index(pm8001_mr32(addressib,
> @@ -820,6 +821,7 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
>                 pm8001_ha->outbnd_q_tbl[i].interrup_vec_cnt_delay = (i << 24);
>                 pm8001_ha->outbnd_q_tbl[i].pi_virt              =
>                         pm8001_ha->memoryMap.region[pi_offset + i].virt_ptr;
> +               pm8001_write_32(pm8001_ha->outbnd_q_tbl[i].pi_virt, 0, 0);
>                 offsetob = i * 0x24;
>                 pm8001_ha->outbnd_q_tbl[i].ci_pci_bar           =
>                         get_pci_bar_index(pm8001_mr32(addressob,
> --
> 2.16.3
>



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