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