diff options
Diffstat (limited to 'drivers/gpu/drm/openchrome/via_fence.h')
| -rw-r--r-- | drivers/gpu/drm/openchrome/via_fence.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/gpu/drm/openchrome/via_fence.h b/drivers/gpu/drm/openchrome/via_fence.h new file mode 100644 index 000000000000..188343223c35 --- /dev/null +++ b/drivers/gpu/drm/openchrome/via_fence.h @@ -0,0 +1,97 @@ +/* + * Copyright 2013 James Simmons <jsimmons@infradead.org> + * + * Influenced by sample code from VIA Technologies and the radeon driver. + * + * 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, sub license, + * 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR(S) OR COPYRIGHT HOLDER(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 _VIA_FENCE_H_ +#define _VIA_FENCE_H_ + +#define VIA_FENCE_SIZE 32 + +struct via_fence; + +struct via_fence_engine { + struct work_struct fence_work; + struct via_fence_pool *pool; + + /* virtual address for getting seq value */ + void *read_seq; + + /* which engine we are */ + int index; +}; + +struct via_fence_pool { + struct ttm_bo_kmap_obj fence_sync; + /* BUS address used for fencing */ + dma_addr_t bus_addr; + + /* for access synchronization */ + spinlock_t lock; + + /* Fence command bounce buffer */ + uint32_t *cmd_buffer; + + struct workqueue_struct *fence_wq; + struct drm_open_hash pending; + struct drm_device *dev; + + void (*fence_signaled)(struct via_fence_engine *eng); + void (*fence_cleanup)(struct via_fence *fence); + int (*fence_emit)(struct via_fence *fence); + + unsigned int num_engines; + struct via_fence_engine engines[]; +}; + +struct via_fence { + /* Which fence pool (DMA or other), this fence is associated with */ + struct via_fence_pool *pool; + /* the sequence number that the fence object emit, + * stored in a hash key */ + struct drm_hash_item seq; + /* the time to wait for the fence object signal */ + unsigned long timeout; + /* Which engine this belongs too */ + int engine; + /* the reference information of this fence object */ + struct kref kref; + /* place holder for special data specific to fence type */ + void *priv; +}; + +extern bool via_fence_signaled(void *sync_obj); +extern int via_fence_wait(void *sync_obj, bool lazy, bool interruptible); +extern int via_fence_flush(void *sync_obj); +extern void via_fence_unref(void **sync_obj); +extern void *via_fence_ref(void *sync_obj); + +extern struct via_fence * +via_fence_create_and_emit(struct via_fence_pool *pool, void *data, + unsigned int engine); + +extern struct via_fence_pool * +via_fence_pool_init(struct drm_device *dev, char *name, int domain, + int num_engines); +extern void via_fence_pool_fini(struct via_fence_pool *pool); + +#endif |