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Commit dc2c4ef1 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Greg Kroah-Hartman
Browse files

coresight: configuring ETF in FIFO mode when acting as link 



When part of a path but not identified as a sink, the EFT has to
be configured as a link and placed in HW FIFO mode.  As such when
enabling a path, call the right configuration function based on
the role the ETF if playing in this trace run.

Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2e499bbc

drivers/hwtracing/coresight/coresight.c

+28 −4
Original line number Diff line number Diff line
@@ -265,15 +265,27 @@ static void coresight_disable_source(struct coresight_device *csdev) 


void coresight_disable_path(struct list_head *path)

{

	u32 type;

	struct coresight_node *nd;

	struct coresight_device *csdev, *parent, *child;



	list_for_each_entry(nd, path, link) {

		csdev = nd->csdev;

		type = csdev->type;



		/*

		 * ETF devices are tricky... They can be a link or a sink,

		 * depending on how they are configured.  If an ETF has been

		 * "activated" it will be configured as a sink, otherwise

		 * go ahead with the link configuration.

		 */

		if (type == CORESIGHT_DEV_TYPE_LINKSINK)

			type = (csdev == coresight_get_sink(path)) ?

						CORESIGHT_DEV_TYPE_SINK :

						CORESIGHT_DEV_TYPE_LINK;



		switch (csdev->type) {

		switch (type) {

		case CORESIGHT_DEV_TYPE_SINK:

		case CORESIGHT_DEV_TYPE_LINKSINK:

			coresight_disable_sink(csdev);

			break;

		case CORESIGHT_DEV_TYPE_SOURCE:
@@ -294,15 +306,27 @@ int coresight_enable_path(struct list_head *path, u32 mode) 
{



	int ret = 0;

	u32 type;

	struct coresight_node *nd;

	struct coresight_device *csdev, *parent, *child;



	list_for_each_entry_reverse(nd, path, link) {

		csdev = nd->csdev;

		type = csdev->type;



		/*

		 * ETF devices are tricky... They can be a link or a sink,

		 * depending on how they are configured.  If an ETF has been

		 * "activated" it will be configured as a sink, otherwise

		 * go ahead with the link configuration.

		 */

		if (type == CORESIGHT_DEV_TYPE_LINKSINK)

			type = (csdev == coresight_get_sink(path)) ?

						CORESIGHT_DEV_TYPE_SINK :

						CORESIGHT_DEV_TYPE_LINK;



		switch (csdev->type) {

		switch (type) {

		case CORESIGHT_DEV_TYPE_SINK:

		case CORESIGHT_DEV_TYPE_LINKSINK:

			ret = coresight_enable_sink(csdev, mode);

			if (ret)

				goto err;