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Commit 132f04bd authored by Mulu He's avatar Mulu He Committed by Gerrit - the friendly Code Review server
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coresight: tpdm: Add reset datasets interface 



Add reset datasets interface for user space reset all datasets to
initial status.

Change-Id: Iea653d7a0ee13b06d0672593ac5bcbafec25f8f2
Signed-off-by: default avatarMulu He <muluhe@codeaurora.org>
parent 292276ff

drivers/hwtracing/coresight/coresight-tpdm.c

+54 −0
Original line number Diff line number Diff line
@@ -272,6 +272,8 @@ struct tpdm_drvdata { 
	bool			msr_fix_req;

};



static void tpdm_init_default_data(struct tpdm_drvdata *drvdata);



static void tpdm_setup_disable(struct tpdm_drvdata *drvdata)

{

	int i;
@@ -897,6 +899,57 @@ static ssize_t tpdm_store_enable_datasets(struct device *dev, 
static DEVICE_ATTR(enable_datasets, 0644,

		   tpdm_show_enable_datasets, tpdm_store_enable_datasets);



static ssize_t reset_store(struct device *dev,

					  struct device_attribute *attr,

					  const char *buf,

					  size_t size)

{

	int ret = 0;

	unsigned long val;

	struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);



	ret = kstrtoul(buf, 10, &val);

	if (ret)

		return ret;



	mutex_lock(&drvdata->lock);

	/* Reset all datasets to ZERO */

	if (drvdata->gpr != NULL)

		memset(drvdata->gpr, 0, sizeof(struct gpr_dataset));



	if (drvdata->bc != NULL)

		memset(drvdata->bc, 0, sizeof(struct bc_dataset));



	if (drvdata->dsb != NULL)

		memset(drvdata->dsb, 0, sizeof(struct dsb_dataset));



	if (drvdata->cmb != NULL) {

		if (drvdata->cmb->mcmb != NULL)

			memset(drvdata->cmb->mcmb, 0,

				sizeof(struct mcmb_dataset));



		memset(drvdata->cmb, 0, sizeof(struct cmb_dataset));

	}

	/* Init the default data */

	tpdm_init_default_data(drvdata);



	/* Disable tpdm if enabled */

	if (drvdata->enable) {

		__tpdm_disable(drvdata);

		drvdata->enable = false;

	}



	mutex_unlock(&drvdata->lock);



	if (drvdata->enable) {

		tpdm_setup_disable(drvdata);

		dev_info(drvdata->dev, "TPDM tracing disabled\n");

	}



	return size;

}

static DEVICE_ATTR_WO(reset);



static ssize_t tpdm_show_gp_regs(struct device *dev,

				 struct device_attribute *attr,

				 char *buf)
@@ -4208,6 +4261,7 @@ static struct attribute_group tpdm_cmb_attr_grp = { 
static struct attribute *tpdm_attrs[] = {

	&dev_attr_available_datasets.attr,

	&dev_attr_enable_datasets.attr,

	&dev_attr_reset.attr,

	&dev_attr_gp_regs.attr,

	NULL,

};