diff options
-rw-r--r-- | drivers/hwtracing/coresight/coresight-core.c | 51 | ||||
-rw-r--r-- | drivers/hwtracing/coresight/coresight-priv.h | 2 | ||||
-rw-r--r-- | include/linux/coresight.h | 14 |
3 files changed, 27 insertions, 40 deletions
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c index 1dd3cd46fda4..37e59052e877 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -500,7 +500,7 @@ static void coresight_disable_path_from(struct list_head *path, /* * 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 + * selected as a sink it will be configured as a sink, otherwise * go ahead with the link configuration. */ if (type == CORESIGHT_DEV_TYPE_LINKSINK) @@ -578,7 +578,7 @@ int coresight_enable_path(struct list_head *path, enum cs_mode mode, /* * 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 + * selected as a sink it will be configured as a sink, otherwise * go ahead with the link configuration. */ if (type == CORESIGHT_DEV_TYPE_LINKSINK) @@ -635,15 +635,21 @@ struct coresight_device *coresight_get_sink(struct list_head *path) return csdev; } +/** + * coresight_find_activated_sysfs_sink - returns the first sink activated via + * sysfs using connection based search starting from the source reference. + * + * @csdev: Coresight source device reference + */ static struct coresight_device * -coresight_find_enabled_sink(struct coresight_device *csdev) +coresight_find_activated_sysfs_sink(struct coresight_device *csdev) { int i; struct coresight_device *sink = NULL; if ((csdev->type == CORESIGHT_DEV_TYPE_SINK || csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) && - csdev->activated) + csdev->sysfs_sink_activated) return csdev; /* @@ -654,7 +660,7 @@ coresight_find_enabled_sink(struct coresight_device *csdev) child_dev = csdev->pdata->out_conns[i]->dest_dev; if (child_dev) - sink = coresight_find_enabled_sink(child_dev); + sink = coresight_find_activated_sysfs_sink(child_dev); if (sink) return sink; } @@ -662,21 +668,6 @@ coresight_find_enabled_sink(struct coresight_device *csdev) return NULL; } -/** - * coresight_get_enabled_sink - returns the first enabled sink using - * connection based search starting from the source reference - * - * @source: Coresight source device reference - */ -struct coresight_device * -coresight_get_enabled_sink(struct coresight_device *source) -{ - if (!source) - return NULL; - - return coresight_find_enabled_sink(source); -} - static int coresight_sink_by_id(struct device *dev, const void *data) { struct coresight_device *csdev = to_coresight_device(dev); @@ -810,11 +801,10 @@ static void coresight_drop_device(struct coresight_device *csdev) * @sink: The final sink we want in this path. * @path: The list to add devices to. * - * The tree of Coresight device is traversed until an activated sink is - * found. From there the sink is added to the list along with all the - * devices that led to that point - the end result is a list from source - * to sink. In that list the source is the first device and the sink the - * last one. + * The tree of Coresight device is traversed until @sink is found. + * From there the sink is added to the list along with all the devices that led + * to that point - the end result is a list from source to sink. In that list + * the source is the first device and the sink the last one. */ static int _coresight_build_path(struct coresight_device *csdev, struct coresight_device *sink, @@ -824,7 +814,7 @@ static int _coresight_build_path(struct coresight_device *csdev, bool found = false; struct coresight_node *node; - /* An activated sink has been found. Enqueue the element */ + /* The sink has been found. Enqueue the element */ if (csdev == sink) goto out; @@ -1145,7 +1135,7 @@ int coresight_enable(struct coresight_device *csdev) goto out; } - sink = coresight_get_enabled_sink(csdev); + sink = coresight_find_activated_sysfs_sink(csdev); if (!sink) { ret = -EINVAL; goto out; @@ -1259,7 +1249,7 @@ static ssize_t enable_sink_show(struct device *dev, { struct coresight_device *csdev = to_coresight_device(dev); - return scnprintf(buf, PAGE_SIZE, "%u\n", csdev->activated); + return scnprintf(buf, PAGE_SIZE, "%u\n", csdev->sysfs_sink_activated); } static ssize_t enable_sink_store(struct device *dev, @@ -1274,10 +1264,7 @@ static ssize_t enable_sink_store(struct device *dev, if (ret) return ret; - if (val) - csdev->activated = true; - else - csdev->activated = false; + csdev->sysfs_sink_activated = !!val; return size; diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 30c051055e54..ced5be05a527 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -130,8 +130,6 @@ void coresight_disable_path(struct list_head *path); int coresight_enable_path(struct list_head *path, enum cs_mode mode, void *sink_data); struct coresight_device *coresight_get_sink(struct list_head *path); -struct coresight_device * -coresight_get_enabled_sink(struct coresight_device *source); struct coresight_device *coresight_get_sink_by_id(u32 id); struct coresight_device * coresight_find_default_sink(struct coresight_device *csdev); diff --git a/include/linux/coresight.h b/include/linux/coresight.h index e8b6e388218c..516ab45ff3c2 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -229,10 +229,12 @@ struct coresight_sysfs_link { * @refcnt: keep track of what is in use. * @orphan: true if the component has connections that haven't been linked. * @enable: 'true' if component is currently part of an active path. - * @activated: 'true' only if a _sink_ has been activated. A sink can be - * activated but not yet enabled. Enabling for a _sink_ - * happens when a source has been selected and a path is enabled - * from source to that sink. + * @sysfs_sink_activated: 'true' when a sink has been selected for use via sysfs + * by writing a 1 to the 'enable_sink' file. A sink can be + * activated but not yet enabled. Enabling for a _sink_ happens + * when a source has been selected and a path is enabled from + * source to that sink. A sink can also become enabled but not + * activated if it's used via Perf. * @ea: Device attribute for sink representation under PMU directory. * @def_sink: cached reference to default sink found for this device. * @nr_links: number of sysfs links created to other components from this @@ -252,9 +254,9 @@ struct coresight_device { struct device dev; atomic_t refcnt; bool orphan; - bool enable; /* true only if configured as part of a path */ + bool enable; /* sink specific fields */ - bool activated; /* true only if a sink is part of a path */ + bool sysfs_sink_activated; struct dev_ext_attribute *ea; struct coresight_device *def_sink; /* sysfs links between components */ |