diff mbox series

[v4,3/4] remoteproc: stm32: Create sub-functions to request shutdown and release

Message ID 20240308144708.62362-4-arnaud.pouliquen@foss.st.com (mailing list archive)
State Superseded
Headers show
Series Introduction of a remoteproc tee to load signed firmware | expand

Commit Message

Arnaud POULIQUEN March 8, 2024, 2:47 p.m. UTC 
To prepare for the support of TEE remoteproc, create sub-functions
that can be used in both cases, with and without TEE support.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
 drivers/remoteproc/stm32_rproc.c | 84 +++++++++++++++++++-------------
 1 file changed, 51 insertions(+), 33 deletions(-)

Comments

Mathieu Poirier March 25, 2024, 4:48 p.m. UTC | #1 
On Fri, Mar 08, 2024 at 03:47:07PM +0100, Arnaud Pouliquen wrote:
> To prepare for the support of TEE remoteproc, create sub-functions
> that can be used in both cases, with and without TEE support.
> 
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
>  drivers/remoteproc/stm32_rproc.c | 84 +++++++++++++++++++-------------
>  1 file changed, 51 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> index 88623df7d0c3..8cd838df4e92 100644
> --- a/drivers/remoteproc/stm32_rproc.c
> +++ b/drivers/remoteproc/stm32_rproc.c
> @@ -209,6 +209,54 @@ static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name)
>  	return -EINVAL;
>  }
>  
> +static void stm32_rproc_request_shutdown(struct rproc *rproc)
> +{
> +	struct stm32_rproc *ddata = rproc->priv;
> +	int err, dummy_data, idx;
> +
> +	/* Request shutdown of the remote processor */
> +	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
> +		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
> +		if (idx >= 0 && ddata->mb[idx].chan) {
> +			/* A dummy data is sent to allow to block on transmit. */
> +			err = mbox_send_message(ddata->mb[idx].chan,
> +						&dummy_data);

Why is this changed from the original implementation?

> +			if (err < 0)
> +				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
> +		}
> +	}
> +}
> +
> +static int stm32_rproc_release(struct rproc *rproc)
> +{
> +	struct stm32_rproc *ddata = rproc->priv;
> +	unsigned int err = 0;
> +
> +	/* To allow platform Standby power mode, set remote proc Deep Sleep. */
> +	if (ddata->pdds.map) {
> +		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
> +					 ddata->pdds.mask, 1);
> +		if (err) {
> +			dev_err(&rproc->dev, "failed to set pdds\n");
> +			return err;
> +		}
> +	}
> +
> +	/* Update coprocessor state to OFF if available. */
> +	if (ddata->m4_state.map) {
> +		err = regmap_update_bits(ddata->m4_state.map,
> +					 ddata->m4_state.reg,
> +					 ddata->m4_state.mask,
> +					 M4_STATE_OFF);
> +		if (err) {
> +			dev_err(&rproc->dev, "failed to set copro state\n");
> +			return err;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
>  static int stm32_rproc_prepare(struct rproc *rproc)
>  {
>  	struct device *dev = rproc->dev.parent;
> @@ -519,17 +567,9 @@ static int stm32_rproc_detach(struct rproc *rproc)
>  static int stm32_rproc_stop(struct rproc *rproc)
>  {
>  	struct stm32_rproc *ddata = rproc->priv;
> -	int err, idx;
> +	int err;
>  
> -	/* request shutdown of the remote processor */
> -	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
> -		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
> -		if (idx >= 0 && ddata->mb[idx].chan) {
> -			err = mbox_send_message(ddata->mb[idx].chan, "detach");
> -			if (err < 0)
> -				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
> -		}
> -	}
> +	stm32_rproc_request_shutdown(rproc);
>  
>  	err = stm32_rproc_set_hold_boot(rproc, true);
>  	if (err)
> @@ -541,29 +581,7 @@ static int stm32_rproc_stop(struct rproc *rproc)
>  		return err;
>  	}
>  
> -	/* to allow platform Standby power mode, set remote proc Deep Sleep */
> -	if (ddata->pdds.map) {
> -		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
> -					 ddata->pdds.mask, 1);
> -		if (err) {
> -			dev_err(&rproc->dev, "failed to set pdds\n");
> -			return err;
> -		}
> -	}
> -
> -	/* update coprocessor state to OFF if available */
> -	if (ddata->m4_state.map) {
> -		err = regmap_update_bits(ddata->m4_state.map,
> -					 ddata->m4_state.reg,
> -					 ddata->m4_state.mask,
> -					 M4_STATE_OFF);
> -		if (err) {
> -			dev_err(&rproc->dev, "failed to set copro state\n");
> -			return err;
> -		}
> -	}
> -
> -	return 0;
> +	return stm32_rproc_release(rproc);
>  }
>  
>  static void stm32_rproc_kick(struct rproc *rproc, int vqid)
> -- 
> 2.25.1
>
diff mbox series

Patch

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 88623df7d0c3..8cd838df4e92 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -209,6 +209,54 @@  static int stm32_rproc_mbox_idx(struct rproc *rproc, const unsigned char *name)
 	return -EINVAL;
 }
 
+static void stm32_rproc_request_shutdown(struct rproc *rproc)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	int err, dummy_data, idx;
+
+	/* Request shutdown of the remote processor */
+	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
+		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
+		if (idx >= 0 && ddata->mb[idx].chan) {
+			/* A dummy data is sent to allow to block on transmit. */
+			err = mbox_send_message(ddata->mb[idx].chan,
+						&dummy_data);
+			if (err < 0)
+				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
+		}
+	}
+}
+
+static int stm32_rproc_release(struct rproc *rproc)
+{
+	struct stm32_rproc *ddata = rproc->priv;
+	unsigned int err = 0;
+
+	/* To allow platform Standby power mode, set remote proc Deep Sleep. */
+	if (ddata->pdds.map) {
+		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
+					 ddata->pdds.mask, 1);
+		if (err) {
+			dev_err(&rproc->dev, "failed to set pdds\n");
+			return err;
+		}
+	}
+
+	/* Update coprocessor state to OFF if available. */
+	if (ddata->m4_state.map) {
+		err = regmap_update_bits(ddata->m4_state.map,
+					 ddata->m4_state.reg,
+					 ddata->m4_state.mask,
+					 M4_STATE_OFF);
+		if (err) {
+			dev_err(&rproc->dev, "failed to set copro state\n");
+			return err;
+		}
+	}
+
+	return 0;
+}
+
 static int stm32_rproc_prepare(struct rproc *rproc)
 {
 	struct device *dev = rproc->dev.parent;
@@ -519,17 +567,9 @@  static int stm32_rproc_detach(struct rproc *rproc)
 static int stm32_rproc_stop(struct rproc *rproc)
 {
 	struct stm32_rproc *ddata = rproc->priv;
-	int err, idx;
+	int err;
 
-	/* request shutdown of the remote processor */
-	if (rproc->state != RPROC_OFFLINE && rproc->state != RPROC_CRASHED) {
-		idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
-		if (idx >= 0 && ddata->mb[idx].chan) {
-			err = mbox_send_message(ddata->mb[idx].chan, "detach");
-			if (err < 0)
-				dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
-		}
-	}
+	stm32_rproc_request_shutdown(rproc);
 
 	err = stm32_rproc_set_hold_boot(rproc, true);
 	if (err)
@@ -541,29 +581,7 @@  static int stm32_rproc_stop(struct rproc *rproc)
 		return err;
 	}
 
-	/* to allow platform Standby power mode, set remote proc Deep Sleep */
-	if (ddata->pdds.map) {
-		err = regmap_update_bits(ddata->pdds.map, ddata->pdds.reg,
-					 ddata->pdds.mask, 1);
-		if (err) {
-			dev_err(&rproc->dev, "failed to set pdds\n");
-			return err;
-		}
-	}
-
-	/* update coprocessor state to OFF if available */
-	if (ddata->m4_state.map) {
-		err = regmap_update_bits(ddata->m4_state.map,
-					 ddata->m4_state.reg,
-					 ddata->m4_state.mask,
-					 M4_STATE_OFF);
-		if (err) {
-			dev_err(&rproc->dev, "failed to set copro state\n");
-			return err;
-		}
-	}
-
-	return 0;
+	return stm32_rproc_release(rproc);
 }
 
 static void stm32_rproc_kick(struct rproc *rproc, int vqid)