cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drm_damage_helper.h (3408B)

      1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
      2/**************************************************************************
      3 *
      4 * Copyright (c) 2018 VMware, Inc., Palo Alto, CA., USA
      5 * All Rights Reserved.
      6 *
      7 * Permission is hereby granted, free of charge, to any person obtaining a
      8 * copy of this software and associated documentation files (the
      9 * "Software"), to deal in the Software without restriction, including
     10 * without limitation the rights to use, copy, modify, merge, publish,
     11 * distribute, sub license, and/or sell copies of the Software, and to
     12 * permit persons to whom the Software is furnished to do so, subject to
     13 * the following conditions:
     14 *
     15 * The above copyright notice and this permission notice (including the
     16 * next paragraph) shall be included in all copies or substantial portions
     17 * of the Software.
     18 *
     19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     25 * USE OR OTHER DEALINGS IN THE SOFTWARE.
     26 *
     27 * Authors:
     28 * Deepak Rawat <drawat@vmware.com>
     29 *
     30 **************************************************************************/
     31
     32#ifndef DRM_DAMAGE_HELPER_H_
     33#define DRM_DAMAGE_HELPER_H_
     34
     35#include <drm/drm_atomic_helper.h>
     36
     37/**
     38 * drm_atomic_for_each_plane_damage - Iterator macro for plane damage.
     39 * @iter: The iterator to advance.
     40 * @rect: Return a rectangle in fb coordinate clipped to plane src.
     41 *
     42 * Note that if the first call to iterator macro return false then no need to do
     43 * plane update. Iterator will return full plane src when damage is not passed
     44 * by user-space.
     45 */
     46#define drm_atomic_for_each_plane_damage(iter, rect) \
     47	while (drm_atomic_helper_damage_iter_next(iter, rect))
     48
     49/**
     50 * struct drm_atomic_helper_damage_iter - Closure structure for damage iterator.
     51 *
     52 * This structure tracks state needed to walk the list of plane damage clips.
     53 */
     54struct drm_atomic_helper_damage_iter {
     55	/* private: Plane src in whole number. */
     56	struct drm_rect plane_src;
     57	/* private: Rectangles in plane damage blob. */
     58	const struct drm_rect *clips;
     59	/* private: Number of rectangles in plane damage blob. */
     60	uint32_t num_clips;
     61	/* private: Current clip iterator is advancing on. */
     62	uint32_t curr_clip;
     63	/* private: Whether need full plane update. */
     64	bool full_update;
     65};
     66
     67void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state,
     68					  struct drm_plane_state *plane_state);
     69int drm_atomic_helper_dirtyfb(struct drm_framebuffer *fb,
     70			      struct drm_file *file_priv, unsigned int flags,
     71			      unsigned int color, struct drm_clip_rect *clips,
     72			      unsigned int num_clips);
     73void
     74drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter,
     75				   const struct drm_plane_state *old_state,
     76				   const struct drm_plane_state *new_state);
     77bool
     78drm_atomic_helper_damage_iter_next(struct drm_atomic_helper_damage_iter *iter,
     79				   struct drm_rect *rect);
     80bool drm_atomic_helper_damage_merged(const struct drm_plane_state *old_state,
     81				     struct drm_plane_state *state,
     82				     struct drm_rect *rect);
     83
     84#endif