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_flip_work.h (3080B)

      1/*
      2 * Copyright (C) 2013 Red Hat
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice (including the next
     12 * paragraph) shall be included in all copies or substantial portions of the
     13 * Software.
     14 *
     15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     21 * SOFTWARE.
     22 */
     23
     24#ifndef DRM_FLIP_WORK_H
     25#define DRM_FLIP_WORK_H
     26
     27#include <linux/kfifo.h>
     28#include <linux/spinlock.h>
     29#include <linux/workqueue.h>
     30
     31/**
     32 * DOC: flip utils
     33 *
     34 * Util to queue up work to run from work-queue context after flip/vblank.
     35 * Typically this can be used to defer unref of framebuffer's, cursor
     36 * bo's, etc until after vblank.  The APIs are all thread-safe.
     37 * Moreover, drm_flip_work_queue_task and drm_flip_work_queue can be called
     38 * in atomic context.
     39 */
     40
     41struct drm_flip_work;
     42
     43/*
     44 * drm_flip_func_t - callback function
     45 *
     46 * @work: the flip work
     47 * @val: value queued via drm_flip_work_queue()
     48 *
     49 * Callback function to be called for each of the  queue'd work items after
     50 * drm_flip_work_commit() is called.
     51 */
     52typedef void (*drm_flip_func_t)(struct drm_flip_work *work, void *val);
     53
     54/**
     55 * struct drm_flip_task - flip work task
     56 * @node: list entry element
     57 * @data: data to pass to &drm_flip_work.func
     58 */
     59struct drm_flip_task {
     60	struct list_head node;
     61	void *data;
     62};
     63
     64/**
     65 * struct drm_flip_work - flip work queue
     66 * @name: debug name
     67 * @func: callback fxn called for each committed item
     68 * @worker: worker which calls @func
     69 * @queued: queued tasks
     70 * @commited: commited tasks
     71 * @lock: lock to access queued and commited lists
     72 */
     73struct drm_flip_work {
     74	const char *name;
     75	drm_flip_func_t func;
     76	struct work_struct worker;
     77	struct list_head queued;
     78	struct list_head commited;
     79	spinlock_t lock;
     80};
     81
     82struct drm_flip_task *drm_flip_work_allocate_task(void *data, gfp_t flags);
     83void drm_flip_work_queue_task(struct drm_flip_work *work,
     84			      struct drm_flip_task *task);
     85void drm_flip_work_queue(struct drm_flip_work *work, void *val);
     86void drm_flip_work_commit(struct drm_flip_work *work,
     87		struct workqueue_struct *wq);
     88void drm_flip_work_init(struct drm_flip_work *work,
     89		const char *name, drm_flip_func_t func);
     90void drm_flip_work_cleanup(struct drm_flip_work *work);
     91
     92#endif  /* DRM_FLIP_WORK_H */