Re: [PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
On 14/06/19 7:38 PM, Doug Anderson wrote: > Hi, > > On Fri, Jun 14, 2019 at 5:10 AM Ulf Hansson wrote: >> >> On Fri, 14 Jun 2019 at 01:42, Douglas Anderson wrote: >>> >>> We want SDIO drivers to be able to temporarily stop retuning when the >>> driver knows that the SDIO card is not in a state where retuning will >>> work (maybe because the card is asleep). We'll move the relevant >>> functions to a place where drivers can call them. >>> >>> Signed-off-by: Douglas Anderson >> >> This looks good to me. >> >> BTW, seems like this series is best funneled via my mmc tree, no? In >> such case, I need acks for the brcmfmac driver patches. > > For patch #1 I think it could just go in directly to the wireless > tree. It should be fine to land the rest of the patches separately. > > For patch #2 - #5 then what you say makes sense to me. I suppose > you'd want at least a Reviewed-by from Arend and an Ack from Kalle on > the Broadcom patches? > > I'd also suggest that we Cc stable explicitly when applying. That's > easy for #2 and #3 since they have a Fixes tag. For #4 and #5 I guess > the question is how far back to go. Maybe Adrian has an opinion here > since I think he's the one who experienced these problems. V4 seemed to apply cleanly back to v4.18
Re: [PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
On 14/06/19 2:41 AM, Douglas Anderson wrote:
> We want SDIO drivers to be able to temporarily stop retuning when the
> driver knows that the SDIO card is not in a state where retuning will
> work (maybe because the card is asleep). We'll move the relevant
> functions to a place where drivers can call them.
>
> Signed-off-by: Douglas Anderson
Acked-by: Adrian Hunter
> ---
>
> Changes in v4:
> - Moved retune hold/release to SDIO API (Adrian).
>
> Changes in v3:
> - ("mmc: core: Export mmc_retune_hold_now() mmc_retune_release()") new for v3.
>
> Changes in v2: None
>
> drivers/mmc/core/sdio_io.c| 40 +++
> include/linux/mmc/sdio_func.h | 3 +++
> 2 files changed, 43 insertions(+)
>
> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
> index f822a9630b0e..1b6fe737bd72 100644
> --- a/drivers/mmc/core/sdio_io.c
> +++ b/drivers/mmc/core/sdio_io.c
> @@ -15,6 +15,7 @@
> #include "sdio_ops.h"
> #include "core.h"
> #include "card.h"
> +#include "host.h"
>
> /**
> * sdio_claim_host - exclusively claim a bus for a certain SDIO function
> @@ -770,3 +771,42 @@ void sdio_retune_crc_enable(struct sdio_func *func)
> func->card->host->retune_crc_disable = false;
> }
> EXPORT_SYMBOL_GPL(sdio_retune_crc_enable);
> +
> +/**
> + * sdio_retune_hold_now - start deferring retuning requests till release
> + * @func: SDIO function attached to host
> + *
> + * This function can be called if it's currently a bad time to do
> + * a retune of the SDIO card. Retune requests made during this time
> + * will be held and we'll actually do the retune sometime after the
> + * release.
> + *
> + * This function could be useful if an SDIO card is in a power state
> + * where it can respond to a small subset of commands that doesn't
> + * include the retuning command. Care should be taken when using
> + * this function since (presumably) the retuning request we might be
> + * deferring was made for a good reason.
> + *
> + * This function should be called while the host is claimed.
> + */
> +void sdio_retune_hold_now(struct sdio_func *func)
> +{
> + mmc_retune_hold_now(func->card->host);
> +}
> +EXPORT_SYMBOL_GPL(sdio_retune_hold_now);
> +
> +/**
> + * sdio_retune_release - signal that it's OK to retune now
> + * @func: SDIO function attached to host
> + *
> + * This is the complement to sdio_retune_hold_now(). Calling this
> + * function won't make a retune happen right away but will allow
> + * them to be scheduled normally.
> + *
> + * This function should be called while the host is claimed.
> + */
> +void sdio_retune_release(struct sdio_func *func)
> +{
> + mmc_retune_release(func->card->host);
> +}
> +EXPORT_SYMBOL_GPL(sdio_retune_release);
> diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h
> index 4820e6d09dac..5a177f7a83c3 100644
> --- a/include/linux/mmc/sdio_func.h
> +++ b/include/linux/mmc/sdio_func.h
> @@ -170,4 +170,7 @@ extern int sdio_set_host_pm_flags(struct sdio_func *func,
> mmc_pm_flag_t flags);
> extern void sdio_retune_crc_disable(struct sdio_func *func);
> extern void sdio_retune_crc_enable(struct sdio_func *func);
>
> +extern void sdio_retune_hold_now(struct sdio_func *func);
> +extern void sdio_retune_release(struct sdio_func *func);
> +
> #endif /* LINUX_MMC_SDIO_FUNC_H */
>
Re: [PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
On June 14, 2019 6:38:51 PM Doug Anderson wrote: Hi, On Fri, Jun 14, 2019 at 5:10 AM Ulf Hansson wrote: On Fri, 14 Jun 2019 at 01:42, Douglas Anderson wrote: > > We want SDIO drivers to be able to temporarily stop retuning when the > driver knows that the SDIO card is not in a state where retuning will > work (maybe because the card is asleep). We'll move the relevant > functions to a place where drivers can call them. > > Signed-off-by: Douglas Anderson This looks good to me. BTW, seems like this series is best funneled via my mmc tree, no? In such case, I need acks for the brcmfmac driver patches. For patch #1 I think it could just go in directly to the wireless tree. It should be fine to land the rest of the patches separately. Agree. For patch #2 - #5 then what you say makes sense to me. I suppose you'd want at least a Reviewed-by from Arend and an Ack from Kalle on the Broadcom patches? Will do. I'd also suggest that we Cc stable explicitly when applying. That's easy for #2 and #3 since they have a Fixes tag. For #4 and #5 I guess the question is how far back to go. Maybe Adrian has an opinion here since I think he's the one who experienced these problems. I see if I can come up wit a fixes tag for #5. Regards, Arend
Re: [PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
Hi, On Fri, Jun 14, 2019 at 5:10 AM Ulf Hansson wrote: > > On Fri, 14 Jun 2019 at 01:42, Douglas Anderson wrote: > > > > We want SDIO drivers to be able to temporarily stop retuning when the > > driver knows that the SDIO card is not in a state where retuning will > > work (maybe because the card is asleep). We'll move the relevant > > functions to a place where drivers can call them. > > > > Signed-off-by: Douglas Anderson > > This looks good to me. > > BTW, seems like this series is best funneled via my mmc tree, no? In > such case, I need acks for the brcmfmac driver patches. For patch #1 I think it could just go in directly to the wireless tree. It should be fine to land the rest of the patches separately. For patch #2 - #5 then what you say makes sense to me. I suppose you'd want at least a Reviewed-by from Arend and an Ack from Kalle on the Broadcom patches? I'd also suggest that we Cc stable explicitly when applying. That's easy for #2 and #3 since they have a Fixes tag. For #4 and #5 I guess the question is how far back to go. Maybe Adrian has an opinion here since I think he's the one who experienced these problems. Thanks! -Doug
Re: [PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
On Fri, 14 Jun 2019 at 01:42, Douglas Anderson wrote:
>
> We want SDIO drivers to be able to temporarily stop retuning when the
> driver knows that the SDIO card is not in a state where retuning will
> work (maybe because the card is asleep). We'll move the relevant
> functions to a place where drivers can call them.
>
> Signed-off-by: Douglas Anderson
This looks good to me.
BTW, seems like this series is best funneled via my mmc tree, no? In
such case, I need acks for the brcmfmac driver patches.
Kind regards
Uffe
> ---
>
> Changes in v4:
> - Moved retune hold/release to SDIO API (Adrian).
>
> Changes in v3:
> - ("mmc: core: Export mmc_retune_hold_now() mmc_retune_release()") new for v3.
>
> Changes in v2: None
>
> drivers/mmc/core/sdio_io.c| 40 +++
> include/linux/mmc/sdio_func.h | 3 +++
> 2 files changed, 43 insertions(+)
>
> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
> index f822a9630b0e..1b6fe737bd72 100644
> --- a/drivers/mmc/core/sdio_io.c
> +++ b/drivers/mmc/core/sdio_io.c
> @@ -15,6 +15,7 @@
> #include "sdio_ops.h"
> #include "core.h"
> #include "card.h"
> +#include "host.h"
>
> /**
> * sdio_claim_host - exclusively claim a bus for a certain SDIO function
> @@ -770,3 +771,42 @@ void sdio_retune_crc_enable(struct sdio_func *func)
> func->card->host->retune_crc_disable = false;
> }
> EXPORT_SYMBOL_GPL(sdio_retune_crc_enable);
> +
> +/**
> + * sdio_retune_hold_now - start deferring retuning requests till release
> + * @func: SDIO function attached to host
> + *
> + * This function can be called if it's currently a bad time to do
> + * a retune of the SDIO card. Retune requests made during this time
> + * will be held and we'll actually do the retune sometime after the
> + * release.
> + *
> + * This function could be useful if an SDIO card is in a power state
> + * where it can respond to a small subset of commands that doesn't
> + * include the retuning command. Care should be taken when using
> + * this function since (presumably) the retuning request we might be
> + * deferring was made for a good reason.
> + *
> + * This function should be called while the host is claimed.
> + */
> +void sdio_retune_hold_now(struct sdio_func *func)
> +{
> + mmc_retune_hold_now(func->card->host);
> +}
> +EXPORT_SYMBOL_GPL(sdio_retune_hold_now);
> +
> +/**
> + * sdio_retune_release - signal that it's OK to retune now
> + * @func: SDIO function attached to host
> + *
> + * This is the complement to sdio_retune_hold_now(). Calling this
> + * function won't make a retune happen right away but will allow
> + * them to be scheduled normally.
> + *
> + * This function should be called while the host is claimed.
> + */
> +void sdio_retune_release(struct sdio_func *func)
> +{
> + mmc_retune_release(func->card->host);
> +}
> +EXPORT_SYMBOL_GPL(sdio_retune_release);
> diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h
> index 4820e6d09dac..5a177f7a83c3 100644
> --- a/include/linux/mmc/sdio_func.h
> +++ b/include/linux/mmc/sdio_func.h
> @@ -170,4 +170,7 @@ extern int sdio_set_host_pm_flags(struct sdio_func *func,
> mmc_pm_flag_t flags);
> extern void sdio_retune_crc_disable(struct sdio_func *func);
> extern void sdio_retune_crc_enable(struct sdio_func *func);
>
> +extern void sdio_retune_hold_now(struct sdio_func *func);
> +extern void sdio_retune_release(struct sdio_func *func);
> +
> #endif /* LINUX_MMC_SDIO_FUNC_H */
> --
> 2.22.0.rc2.383.gf4fbbf30c2-goog
>
[PATCH v4 4/5] mmc: core: Add sdio_retune_hold_now() and sdio_retune_release()
We want SDIO drivers to be able to temporarily stop retuning when the
driver knows that the SDIO card is not in a state where retuning will
work (maybe because the card is asleep). We'll move the relevant
functions to a place where drivers can call them.
Signed-off-by: Douglas Anderson
---
Changes in v4:
- Moved retune hold/release to SDIO API (Adrian).
Changes in v3:
- ("mmc: core: Export mmc_retune_hold_now() mmc_retune_release()") new for v3.
Changes in v2: None
drivers/mmc/core/sdio_io.c| 40 +++
include/linux/mmc/sdio_func.h | 3 +++
2 files changed, 43 insertions(+)
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index f822a9630b0e..1b6fe737bd72 100644
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -15,6 +15,7 @@
#include "sdio_ops.h"
#include "core.h"
#include "card.h"
+#include "host.h"
/**
* sdio_claim_host - exclusively claim a bus for a certain SDIO function
@@ -770,3 +771,42 @@ void sdio_retune_crc_enable(struct sdio_func *func)
func->card->host->retune_crc_disable = false;
}
EXPORT_SYMBOL_GPL(sdio_retune_crc_enable);
+
+/**
+ * sdio_retune_hold_now - start deferring retuning requests till release
+ * @func: SDIO function attached to host
+ *
+ * This function can be called if it's currently a bad time to do
+ * a retune of the SDIO card. Retune requests made during this time
+ * will be held and we'll actually do the retune sometime after the
+ * release.
+ *
+ * This function could be useful if an SDIO card is in a power state
+ * where it can respond to a small subset of commands that doesn't
+ * include the retuning command. Care should be taken when using
+ * this function since (presumably) the retuning request we might be
+ * deferring was made for a good reason.
+ *
+ * This function should be called while the host is claimed.
+ */
+void sdio_retune_hold_now(struct sdio_func *func)
+{
+ mmc_retune_hold_now(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_retune_hold_now);
+
+/**
+ * sdio_retune_release - signal that it's OK to retune now
+ * @func: SDIO function attached to host
+ *
+ * This is the complement to sdio_retune_hold_now(). Calling this
+ * function won't make a retune happen right away but will allow
+ * them to be scheduled normally.
+ *
+ * This function should be called while the host is claimed.
+ */
+void sdio_retune_release(struct sdio_func *func)
+{
+ mmc_retune_release(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_retune_release);
diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h
index 4820e6d09dac..5a177f7a83c3 100644
--- a/include/linux/mmc/sdio_func.h
+++ b/include/linux/mmc/sdio_func.h
@@ -170,4 +170,7 @@ extern int sdio_set_host_pm_flags(struct sdio_func *func,
mmc_pm_flag_t flags);
extern void sdio_retune_crc_disable(struct sdio_func *func);
extern void sdio_retune_crc_enable(struct sdio_func *func);
+extern void sdio_retune_hold_now(struct sdio_func *func);
+extern void sdio_retune_release(struct sdio_func *func);
+
#endif /* LINUX_MMC_SDIO_FUNC_H */
--
2.22.0.rc2.383.gf4fbbf30c2-goog
