/*
* coresight_disable_path_from : Disable components in the given path beyond
* @nd in the list. If @nd is NULL, all the components, except the SOURCE are
* disabled.
*/
static void coresight_disable_path_from(struct list_head *path,
struct coresight_node *nd)
{
u32 type;
struct coresight_device *csdev, *parent, *child;
if (!nd)
nd = list_first_entry(path, struct coresight_node, link);
list_for_each_entry_continue(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 (type) {
case CORESIGHT_DEV_TYPE_SINK:
coresight_disable_sink(csdev);
break;
case CORESIGHT_DEV_TYPE_SOURCE:
/*
* We skip the first node in the path assuming that it
* is the source. So we don't expect a source device in
* the middle of a path.
*/
WARN_ON(1);
break;
case CORESIGHT_DEV_TYPE_LINK:
parent = list_prev_entry(nd, link)->csdev;
child = list_next_entry(nd, link)->csdev;
coresight_disable_link(csdev, parent, child);
break;
default:
break;
}
}
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 (type) {
case CORESIGHT_DEV_TYPE_SINK:
coresight_disable_sink(csdev);
break;
case CORESIGHT_DEV_TYPE_SOURCE:
/* sources are disabled from either sysFS or Perf */
break;
case CORESIGHT_DEV_TYPE_LINK:
parent = list_prev_entry(nd, link)->csdev;
child = list_next_entry(nd, link)->csdev;
coresight_disable_link(csdev, parent, child);
break;
default:
break;
}
}