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authorSuzuki K Poulose <suzuki.poulose@arm.com>2018-09-20 22:17:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-25 21:09:18 +0300
commit3d6e8935758392179645e1b105789b3da329ad38 (patch)
tree185757d4c134f327f7cf817e74b9573e664ecfba /include/linux/coresight.h
parentd25054ee8d18c937058a1b69b35fa5bfdef471f3 (diff)
downloadlinux-3d6e8935758392179645e1b105789b3da329ad38.tar.xz
coresight: perf: Remove set_buffer call back
In coresight perf mode, we need to prepare the sink before starting a session, which is done via set_buffer call back. We then proceed to enable the tracing. If we fail to start the session successfully, we leave the sink configuration unchanged. In order to make the operation atomic and to avoid yet another call back to clear the buffer, we get rid of the "set_buffer" call back and pass the buffer details via enable() call back to the sink. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/coresight.h')
-rw-r--r--include/linux/coresight.h6
1 files changed, 1 insertions, 5 deletions
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 8e52682b1e90..53535821dc25 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -185,18 +185,14 @@ struct coresight_device {
* @disable: disables the sink.
* @alloc_buffer: initialises perf's ring buffer for trace collection.
* @free_buffer: release memory allocated in @get_config.
- * @set_buffer: initialises buffer mechanic before a trace session.
* @update_buffer: update buffer pointers after a trace session.
*/
struct coresight_ops_sink {
- int (*enable)(struct coresight_device *csdev, u32 mode);
+ int (*enable)(struct coresight_device *csdev, u32 mode, void *data);
void (*disable)(struct coresight_device *csdev);
void *(*alloc_buffer)(struct coresight_device *csdev, int cpu,
void **pages, int nr_pages, bool overwrite);
void (*free_buffer)(void *config);
- int (*set_buffer)(struct coresight_device *csdev,
- struct perf_output_handle *handle,
- void *sink_config);
unsigned long (*update_buffer)(struct coresight_device *csdev,
struct perf_output_handle *handle,
void *sink_config);