> From: Marcel Ziswiler <marcel@xxxxxxxxxxxx>
> Sent: Thursday, December 14, 2023 6:44 PM
> To: David Lin <yu-hao.lin@xxxxxxx>; linux-wireless@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx; briannorris@xxxxxxxxxxxx;
> kvalo@xxxxxxxxxx; francesco@xxxxxxxxxx; Pete Hsieh
> <tsung-hsien.hsieh@xxxxxxx>; stable@xxxxxxxxxxxxxxx
> Subject: [EXT] Re: [PATCH v3] wifi: mwifiex: add extra delay for firmware
> ready
>
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>
>
> On Sat, 2023-12-09 at 07:40 +0800, David Lin wrote:
> > For SDIO IW416, due to a bug, FW may return ready before complete full
> > initialization.
>
> BTW: What makes you think this issue is exclusive to the IW416?
>
> We have also seen this in the past both on our Verdin iMX8M Mini
> (SDIO/SDIO) and Verdin iMX8M Plus (SDIO/UART) with 88W8997.
>
> good case:
>
> [ 6.496541] mwifiex_sdio mmc0:0001:1: info: FW download over, size
> 594556 bytes
> ...
> [ 7.272436] mwifiex_sdio mmc0:0001:1: WLAN FW is active
> [ 7.314958] mwifiex_sdio mmc0:0001:1: Unknown api_id: 5
> [ 7.347647] mwifiex_sdio mmc0:0001:1: info: MWIFIEX VERSION: mwifiex
> 1.0 (16.92.21.p55)
> [ 7.355977] mwifiex_sdio mmc0:0001:1: driver_version = mwifiex 1.0
> (16.92.21.p55)
>
> bad case:
>
> [ 8.720216] mwifiex_sdio mmc0:0001:1: info: FW download over, size
> 594556 bytes
> ...
> [ 24.976699] mwifiex_sdio mmc0:0001:1: FW failed to be active in time
> [ 24.983098] mwifiex_sdio mmc0:0001:1: info: _mwifiex_fw_dpc:
> unregister device
>
>From the log, it is not related to the issue fixed by this patch. This patch fixes command timeout for the first command sent to firmware.
Error log:
[ 20.192096] mwifiex_sdio mmc1:0001:1: mwifiex_cmd_timeout_func: Timeout cmd id = 0xa9, act = 0x0
Command ID indicates this it the first command sent to firmware.
> > Command timeout may occur at driver load after reboot.
> > Workaround by adding 100ms delay at checking FW status.
> >
> > Signed-off-by: David Lin <yu-hao.lin@xxxxxxx>
> > Cc: stable@xxxxxxxxxxxxxxx
> Tested-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx> # Verdin AM62
> (IW416)
>
> > ---
> >
> > v3:
> > - v2 was a not finished patch that was send to the LKML by mistake
> > - changed check condition for extra delay with clear comments.
> > - added flag to struct mwifiex_sdio_device / mwifiex_sdio_sd8978 to
> > enable extra delay only for IW416.
> > ---
> > drivers/net/wireless/marvell/mwifiex/sdio.c | 19 +++++++++++++++++++
> > drivers/net/wireless/marvell/mwifiex/sdio.h | 2 ++
> > 2 files changed, 21 insertions(+)
> >
> > diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c
> > b/drivers/net/wireless/marvell/mwifiex/sdio.c
> > index 6462a0ffe698..ef3e68d1059c 100644
> > --- a/drivers/net/wireless/marvell/mwifiex/sdio.c
> > +++ b/drivers/net/wireless/marvell/mwifiex/sdio.c
> > @@ -331,6 +331,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8786 = {
> > .can_dump_fw = false,
> > .can_auto_tdls = false,
> > .can_ext_scan = false,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8787 = { @@
> > -346,6 +347,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8787 = {
> > .can_dump_fw = false,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8797 = { @@
> > -361,6 +363,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8797 = {
> > .can_dump_fw = false,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8897 = { @@
> > -376,6 +379,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8897 = {
> > .can_dump_fw = true,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8977 = { @@
> > -392,6 +396,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8977 = {
> > .fw_dump_enh = true,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8978 = { @@
> > -408,6 +413,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8978 = {
> > .fw_dump_enh = true,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = true,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8997 = { @@
> > -425,6 +431,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8997 = {
> > .fw_dump_enh = true,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8887 = { @@
> > -440,6 +447,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8887 = {
> > .can_dump_fw = false,
> > .can_auto_tdls = true,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8987 = { @@
> > -456,6 +464,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8987 = {
> > .fw_dump_enh = true,
> > .can_auto_tdls = true,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static const struct mwifiex_sdio_device mwifiex_sdio_sd8801 = { @@
> > -471,6 +480,7 @@ static const struct mwifiex_sdio_device
> mwifiex_sdio_sd8801 = {
> > .can_dump_fw = false,
> > .can_auto_tdls = false,
> > .can_ext_scan = true,
> > + .fw_ready_extra_delay = false,
> > };
> >
> > static struct memory_type_mapping generic_mem_type_map[] = { @@
> > -563,6 +573,7 @@ mwifiex_sdio_probe(struct sdio_func *func, const struct
> sdio_device_id *id)
> > card->fw_dump_enh = data->fw_dump_enh;
> > card->can_auto_tdls = data->can_auto_tdls;
> > card->can_ext_scan = data->can_ext_scan;
> > + card->fw_ready_extra_delay =
> data->fw_ready_extra_delay;
> > INIT_WORK(&card->work, mwifiex_sdio_work);
> > }
> >
> > @@ -766,6 +777,7 @@ mwifiex_sdio_read_fw_status(struct
> mwifiex_adapter
> > *adapter, u16 *dat) static int mwifiex_check_fw_status(struct
> mwifiex_adapter *adapter,
> > u32 poll_num) {
> > + struct sdio_mmc_card *card = adapter->card;
> > int ret = 0;
> > u16 firmware_stat;
> > u32 tries;
> > @@ -783,6 +795,13 @@ static int mwifiex_check_fw_status(struct
> mwifiex_adapter *adapter,
> > ret = -1;
> > }
> >
> > + if (card->fw_ready_extra_delay &&
> > + firmware_stat == FIRMWARE_READY_SDIO)
> > + /* firmware might pretend to be ready, when it's not.
> > + * Wait a little bit more as a workaround.
> > + */
> > + msleep(100);
> > +
> > return ret;
> > }
> >
> > diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.h
> > b/drivers/net/wireless/marvell/mwifiex/sdio.h
> > index b86a9263a6a8..cb63ad55d675 100644
> > --- a/drivers/net/wireless/marvell/mwifiex/sdio.h
> > +++ b/drivers/net/wireless/marvell/mwifiex/sdio.h
> > @@ -255,6 +255,7 @@ struct sdio_mmc_card {
> > bool fw_dump_enh;
> > bool can_auto_tdls;
> > bool can_ext_scan;
> > + bool fw_ready_extra_delay;
> >
> > struct mwifiex_sdio_mpa_tx mpa_tx;
> > struct mwifiex_sdio_mpa_rx mpa_rx; @@ -278,6 +279,7 @@ struct
> > mwifiex_sdio_device {
> > bool fw_dump_enh;
> > bool can_auto_tdls;
> > bool can_ext_scan;
> > + bool fw_ready_extra_delay;
> > };
> >
> > /*
> >
> > base-commit: 783004b6dbda2cfe9a552a4cc9c1d168a2068f6c
