/* * Copyright © 2016 Collabora Ltd. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */#ifndef __DRM_DEBUGFS_CRC_H__#define __DRM_DEBUGFS_CRC_H__ #include <linux/spinlock_types.h>#include <linux/types.h>#include <linux/wait.h> struct drm_crtc; #define DRM_MAX_CRC_NR		10 /** * struct drm_crtc_crc_entry - entry describing a frame's content * @has_frame_counter: whether the source was able to provide a frame number * @frame: number of the frame this CRC is about, if @has_frame_counter is true * @crcs: array of values that characterize the frame */struct drm_crtc_crc_entry {	bool has_frame_counter;	uint32_t frame;	uint32_t crcs[DRM_MAX_CRC_NR];}; #define DRM_CRC_ENTRIES_NR	128 /** * struct drm_crtc_crc - data supporting CRC capture on a given CRTC * @lock: protects the fields in this struct * @source: name of the currently configured source of CRCs * @opened: whether userspace has opened the data file for reading * @overflow: whether an overflow occurred * @entries: array of entries, with size of %DRM_CRC_ENTRIES_NR * @head: head of circular queue * @tail: tail of circular queue * @values_cnt: number of CRC values per entry, up to %DRM_MAX_CRC_NR * @wq: workqueue used to synchronize reading and writing */struct drm_crtc_crc {	spinlock_t lock;	const char *source;	bool opened, overflow;	struct drm_crtc_crc_entry *entries;	int head, tail;	size_t values_cnt;	wait_queue_head_t wq;}; #if defined(CONFIG_DEBUG_FS)int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,			   uint32_t frame, uint32_t *crcs);#elsestatic inline int drm_crtc_add_crc_entry(struct drm_crtc *crtc, bool has_frame,					 uint32_t frame, uint32_t *crcs){	return -EINVAL;}#endif /* defined(CONFIG_DEBUG_FS) */ #endif /* __DRM_DEBUGFS_CRC_H__ */