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      1 /****************************************************************************
      2  * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
      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 shall be included
     12  * in all copies or substantial portions of the Software.
     13  *
     14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     20  ***************************************************************************/
     21 
     22 #ifndef SWR_FENCE_H
     23 #define SWR_FENCE_H
     24 
     25 #include "pipe/p_state.h"
     26 #include "util/u_inlines.h"
     27 
     28 #include "swr_fence_work.h"
     29 
     30 struct pipe_screen;
     31 
     32 struct swr_fence {
     33    struct pipe_reference reference;
     34 
     35    uint64_t read;
     36    uint64_t write;
     37 
     38    unsigned pending;
     39 
     40    unsigned id; /* Just for reference */
     41 
     42    struct {
     43       uint32_t count;
     44       struct swr_fence_work head;
     45       struct swr_fence_work *tail;
     46    } work;
     47 };
     48 
     49 
     50 static inline struct swr_fence *
     51 swr_fence(struct pipe_fence_handle *fence)
     52 {
     53    return (struct swr_fence *)fence;
     54 }
     55 
     56 
     57 static INLINE boolean
     58 swr_is_fence_done(struct pipe_fence_handle *fence_handle)
     59 {
     60    struct swr_fence *fence = swr_fence(fence_handle);
     61    return (fence->read == fence->write);
     62 }
     63 
     64 static INLINE boolean
     65 swr_is_fence_pending(struct pipe_fence_handle *fence_handle)
     66 {
     67    return swr_fence(fence_handle)->pending;
     68 }
     69 
     70 
     71 void swr_fence_init(struct pipe_screen *screen);
     72 
     73 struct pipe_fence_handle *swr_fence_create();
     74 
     75 void swr_fence_reference(struct pipe_screen *screen,
     76                          struct pipe_fence_handle **ptr,
     77                          struct pipe_fence_handle *f);
     78 
     79 boolean swr_fence_finish(struct pipe_screen *screen,
     80                          struct pipe_context *ctx,
     81                          struct pipe_fence_handle *fence_handle,
     82                          uint64_t timeout);
     83 
     84 void
     85 swr_fence_submit(struct swr_context *ctx, struct pipe_fence_handle *fence);
     86 
     87 uint64_t swr_get_timestamp(struct pipe_screen *screen);
     88 
     89 #endif
     90