diff mbox series

[v2,3/8] coresight-tpdm: Add CMB dataset support

Message ID 1698202408-14608-4-git-send-email-quic_taozha@quicinc.com
State New
Headers show
Series [v2,1/8] dt-bindings: arm: Add support for CMB element size | expand

Commit Message

Tao Zhang Oct. 25, 2023, 2:53 a.m. UTC 
CMB (continuous multi-bit) is one of TPDM's dataset type. CMB subunit
can be enabled for data collection by writing 1 to the first bit of
CMB_CR register. This change is to add enable/disable function for
CMB dataset by writing CMB_CR register.

Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
---
 drivers/hwtracing/coresight/coresight-tpdm.c | 31 ++++++++++++++++++++++++++++
 drivers/hwtracing/coresight/coresight-tpdm.h |  8 +++++++
 2 files changed, 39 insertions(+)

Comments

James Clark Oct. 30, 2023, 11:15 a.m. UTC | #1 
On 25/10/2023 03:53, Tao Zhang wrote:
> CMB (continuous multi-bit) is one of TPDM's dataset type. CMB subunit
> can be enabled for data collection by writing 1 to the first bit of
> CMB_CR register. This change is to add enable/disable function for
> CMB dataset by writing CMB_CR register.
> 
> Signed-off-by: Tao Zhang <quic_taozha@quicinc.com>
> Signed-off-by: Jinlong Mao <quic_jinlmao@quicinc.com>
> ---
>  drivers/hwtracing/coresight/coresight-tpdm.c | 31 ++++++++++++++++++++++++++++
>  drivers/hwtracing/coresight/coresight-tpdm.h |  8 +++++++
>  2 files changed, 39 insertions(+)
> 

Reviewed-by: James Clark <james.clark@arm.com>

> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
> index 97654aa..c8bb388 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.c
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.c
> @@ -131,6 +131,11 @@ static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata)
>  	return (drvdata->datasets & TPDM_PIDR0_DS_DSB);
>  }
>  
> +static bool tpdm_has_cmb_dataset(struct tpdm_drvdata *drvdata)
> +{
> +	return (drvdata->datasets & TPDM_PIDR0_DS_CMB);
> +}
> +
>  static umode_t tpdm_dsb_is_visible(struct kobject *kobj,
>  				   struct attribute *attr, int n)
>  {
> @@ -267,6 +272,17 @@ static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
>  	writel_relaxed(val, drvdata->base + TPDM_DSB_CR);
>  }
>  
> +static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
> +{
> +	u32 val;
> +
> +	val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
> +	val |= TPDM_CMB_CR_ENA;
> +
> +	/* Set the enable bit of CMB control register to 1 */
> +	writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
> +}
> +
>  /*
>   * TPDM enable operations
>   * The TPDM or Monitor serves as data collection component for various
> @@ -281,6 +297,8 @@ static void __tpdm_enable(struct tpdm_drvdata *drvdata)
>  
>  	if (tpdm_has_dsb_dataset(drvdata))
>  		tpdm_enable_dsb(drvdata);
> +	if (tpdm_has_cmb_dataset(drvdata))
> +		tpdm_enable_cmb(drvdata);
>  
>  	CS_LOCK(drvdata->base);
>  }
> @@ -314,6 +332,17 @@ static void tpdm_disable_dsb(struct tpdm_drvdata *drvdata)
>  	writel_relaxed(val, drvdata->base + TPDM_DSB_CR);
>  }
>  
> +static void tpdm_disable_cmb(struct tpdm_drvdata *drvdata)
> +{
> +	u32 val;
> +
> +	val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
> +	val &= ~TPDM_CMB_CR_ENA;
> +
> +	/* Set the enable bit of CMB control register to 0 */
> +	writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
> +}
> +
>  /* TPDM disable operations */
>  static void __tpdm_disable(struct tpdm_drvdata *drvdata)
>  {
> @@ -321,6 +350,8 @@ static void __tpdm_disable(struct tpdm_drvdata *drvdata)
>  
>  	if (tpdm_has_dsb_dataset(drvdata))
>  		tpdm_disable_dsb(drvdata);
> +	if (tpdm_has_cmb_dataset(drvdata))
> +		tpdm_disable_cmb(drvdata);
>  
>  	CS_LOCK(drvdata->base);
>  }
> diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
> index 4115b2a1..0098c58 100644
> --- a/drivers/hwtracing/coresight/coresight-tpdm.h
> +++ b/drivers/hwtracing/coresight/coresight-tpdm.h
> @@ -9,6 +9,12 @@
>  /* The max number of the datasets that TPDM supports */
>  #define TPDM_DATASETS       7
>  
> +/* CMB Subunit Registers */
> +#define TPDM_CMB_CR		(0xA00)
> +
> +/* Enable bit for CMB subunit */
> +#define TPDM_CMB_CR_ENA		BIT(0)
> +
>  /* DSB Subunit Registers */
>  #define TPDM_DSB_CR		(0x780)
>  #define TPDM_DSB_TIER		(0x784)
> @@ -79,10 +85,12 @@
>   *
>   * PERIPHIDR0[0] : Fix to 1 if ImplDef subunit present, else 0
>   * PERIPHIDR0[1] : Fix to 1 if DSB subunit present, else 0
> + * PERIPHIDR0[2] : Fix to 1 if CMB subunit present, else 0
>   */
>  
>  #define TPDM_PIDR0_DS_IMPDEF	BIT(0)
>  #define TPDM_PIDR0_DS_DSB	BIT(1)
> +#define TPDM_PIDR0_DS_CMB	BIT(2)
>  
>  #define TPDM_DSB_MAX_LINES	256
>  /* MAX number of EDCR registers */
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index 97654aa..c8bb388 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -131,6 +131,11 @@  static bool tpdm_has_dsb_dataset(struct tpdm_drvdata *drvdata)
 	return (drvdata->datasets & TPDM_PIDR0_DS_DSB);
 }
 
+static bool tpdm_has_cmb_dataset(struct tpdm_drvdata *drvdata)
+{
+	return (drvdata->datasets & TPDM_PIDR0_DS_CMB);
+}
+
 static umode_t tpdm_dsb_is_visible(struct kobject *kobj,
 				   struct attribute *attr, int n)
 {
@@ -267,6 +272,17 @@  static void tpdm_enable_dsb(struct tpdm_drvdata *drvdata)
 	writel_relaxed(val, drvdata->base + TPDM_DSB_CR);
 }
 
+static void tpdm_enable_cmb(struct tpdm_drvdata *drvdata)
+{
+	u32 val;
+
+	val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
+	val |= TPDM_CMB_CR_ENA;
+
+	/* Set the enable bit of CMB control register to 1 */
+	writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
+}
+
 /*
  * TPDM enable operations
  * The TPDM or Monitor serves as data collection component for various
@@ -281,6 +297,8 @@  static void __tpdm_enable(struct tpdm_drvdata *drvdata)
 
 	if (tpdm_has_dsb_dataset(drvdata))
 		tpdm_enable_dsb(drvdata);
+	if (tpdm_has_cmb_dataset(drvdata))
+		tpdm_enable_cmb(drvdata);
 
 	CS_LOCK(drvdata->base);
 }
@@ -314,6 +332,17 @@  static void tpdm_disable_dsb(struct tpdm_drvdata *drvdata)
 	writel_relaxed(val, drvdata->base + TPDM_DSB_CR);
 }
 
+static void tpdm_disable_cmb(struct tpdm_drvdata *drvdata)
+{
+	u32 val;
+
+	val = readl_relaxed(drvdata->base + TPDM_CMB_CR);
+	val &= ~TPDM_CMB_CR_ENA;
+
+	/* Set the enable bit of CMB control register to 0 */
+	writel_relaxed(val, drvdata->base + TPDM_CMB_CR);
+}
+
 /* TPDM disable operations */
 static void __tpdm_disable(struct tpdm_drvdata *drvdata)
 {
@@ -321,6 +350,8 @@  static void __tpdm_disable(struct tpdm_drvdata *drvdata)
 
 	if (tpdm_has_dsb_dataset(drvdata))
 		tpdm_disable_dsb(drvdata);
+	if (tpdm_has_cmb_dataset(drvdata))
+		tpdm_disable_cmb(drvdata);
 
 	CS_LOCK(drvdata->base);
 }
diff --git a/drivers/hwtracing/coresight/coresight-tpdm.h b/drivers/hwtracing/coresight/coresight-tpdm.h
index 4115b2a1..0098c58 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.h
+++ b/drivers/hwtracing/coresight/coresight-tpdm.h
@@ -9,6 +9,12 @@ 
 /* The max number of the datasets that TPDM supports */
 #define TPDM_DATASETS       7
 
+/* CMB Subunit Registers */
+#define TPDM_CMB_CR		(0xA00)
+
+/* Enable bit for CMB subunit */
+#define TPDM_CMB_CR_ENA		BIT(0)
+
 /* DSB Subunit Registers */
 #define TPDM_DSB_CR		(0x780)
 #define TPDM_DSB_TIER		(0x784)
@@ -79,10 +85,12 @@ 
  *
  * PERIPHIDR0[0] : Fix to 1 if ImplDef subunit present, else 0
  * PERIPHIDR0[1] : Fix to 1 if DSB subunit present, else 0
+ * PERIPHIDR0[2] : Fix to 1 if CMB subunit present, else 0
  */
 
 #define TPDM_PIDR0_DS_IMPDEF	BIT(0)
 #define TPDM_PIDR0_DS_DSB	BIT(1)
+#define TPDM_PIDR0_DS_CMB	BIT(2)
 
 #define TPDM_DSB_MAX_LINES	256
 /* MAX number of EDCR registers */