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92 lines
3.0 KiB
92 lines
3.0 KiB
/* |
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* Copyright (C) 2013 Red Hat |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the next |
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* paragraph) shall be included in all copies or substantial portions of the |
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* Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#ifndef DRM_FLIP_WORK_H |
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#define DRM_FLIP_WORK_H |
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#include <linux/kfifo.h> |
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#include <linux/spinlock.h> |
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#include <linux/workqueue.h> |
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/** |
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* DOC: flip utils |
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* |
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* Util to queue up work to run from work-queue context after flip/vblank. |
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* Typically this can be used to defer unref of framebuffer's, cursor |
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* bo's, etc until after vblank. The APIs are all thread-safe. |
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* Moreover, drm_flip_work_queue_task and drm_flip_work_queue can be called |
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* in atomic context. |
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*/ |
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struct drm_flip_work; |
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/* |
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* drm_flip_func_t - callback function |
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* |
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* @work: the flip work |
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* @val: value queued via drm_flip_work_queue() |
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* |
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* Callback function to be called for each of the queue'd work items after |
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* drm_flip_work_commit() is called. |
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*/ |
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typedef void (*drm_flip_func_t)(struct drm_flip_work *work, void *val); |
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/** |
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* struct drm_flip_task - flip work task |
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* @node: list entry element |
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* @data: data to pass to &drm_flip_work.func |
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*/ |
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struct drm_flip_task { |
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struct list_head node; |
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void *data; |
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}; |
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/** |
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* struct drm_flip_work - flip work queue |
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* @name: debug name |
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* @func: callback fxn called for each committed item |
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* @worker: worker which calls @func |
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* @queued: queued tasks |
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* @commited: commited tasks |
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* @lock: lock to access queued and commited lists |
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*/ |
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struct drm_flip_work { |
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const char *name; |
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drm_flip_func_t func; |
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struct work_struct worker; |
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struct list_head queued; |
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struct list_head commited; |
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spinlock_t lock; |
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}; |
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struct drm_flip_task *drm_flip_work_allocate_task(void *data, gfp_t flags); |
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void drm_flip_work_queue_task(struct drm_flip_work *work, |
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struct drm_flip_task *task); |
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void drm_flip_work_queue(struct drm_flip_work *work, void *val); |
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void drm_flip_work_commit(struct drm_flip_work *work, |
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struct workqueue_struct *wq); |
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void drm_flip_work_init(struct drm_flip_work *work, |
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const char *name, drm_flip_func_t func); |
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void drm_flip_work_cleanup(struct drm_flip_work *work); |
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#endif /* DRM_FLIP_WORK_H */
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