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/*
* 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
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