• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  ***************************************************************************/
23 
24 #include "pipe/p_screen.h"
25 #include "util/u_memory.h"
26 #include "util/os_time.h"
27 
28 #include "swr_context.h"
29 #include "swr_screen.h"
30 #include "swr_fence.h"
31 
32 #if defined(PIPE_CC_MSVC) // portable thread yield
33    #define sched_yield SwitchToThread
34 #endif
35 
36 /*
37  * Fence callback, called by back-end thread on completion of all rendering up
38  * to SwrSync call.
39  */
40 static void
swr_fence_cb(uint64_t userData,uint64_t userData2,uint64_t userData3)41 swr_fence_cb(uint64_t userData, uint64_t userData2, uint64_t userData3)
42 {
43    struct swr_fence *fence = (struct swr_fence *)userData;
44 
45    /* Complete all work attached to the fence */
46    swr_fence_do_work(fence);
47 
48    /* Correct value is in SwrSync data, and not the fence write field. */
49    fence->read = userData2;
50 }
51 
52 /*
53  * Submit an existing fence.
54  */
55 void
swr_fence_submit(struct swr_context * ctx,struct pipe_fence_handle * fh)56 swr_fence_submit(struct swr_context *ctx, struct pipe_fence_handle *fh)
57 {
58    struct swr_fence *fence = swr_fence(fh);
59 
60    fence->write++;
61    fence->pending = TRUE;
62    ctx->api.pfnSwrSync(ctx->swrContext, swr_fence_cb, (uint64_t)fence, fence->write, 0);
63 }
64 
65 /*
66  * Create a new fence object.
67  */
68 struct pipe_fence_handle *
swr_fence_create()69 swr_fence_create()
70 {
71    static int fence_id = 0;
72    struct swr_fence *fence = CALLOC_STRUCT(swr_fence);
73    if (!fence)
74       return NULL;
75 
76    pipe_reference_init(&fence->reference, 1);
77    fence->id = fence_id++;
78    fence->work.tail = &fence->work.head;
79 
80    return (struct pipe_fence_handle *)fence;
81 }
82 
83 /** Destroy a fence.  Called when refcount hits zero. */
84 static void
swr_fence_destroy(struct swr_fence * fence)85 swr_fence_destroy(struct swr_fence *fence)
86 {
87    /* Complete any work left if fence was not submitted */
88    swr_fence_do_work(fence);
89    FREE(fence);
90 }
91 
92 /**
93  * Set ptr = fence, with reference counting
94  */
95 void
swr_fence_reference(struct pipe_screen * screen,struct pipe_fence_handle ** ptr,struct pipe_fence_handle * f)96 swr_fence_reference(struct pipe_screen *screen,
97                     struct pipe_fence_handle **ptr,
98                     struct pipe_fence_handle *f)
99 {
100    struct swr_fence *fence = swr_fence(f);
101    struct swr_fence *old;
102 
103    if (likely(ptr)) {
104       old = swr_fence(*ptr);
105       *ptr = f;
106    } else {
107       old = NULL;
108    }
109 
110    if (pipe_reference(&old->reference, &fence->reference)) {
111       swr_fence_finish(screen, NULL, (struct pipe_fence_handle *) old, 0);
112       swr_fence_destroy(old);
113    }
114 }
115 
116 
117 /*
118  * Wait for the fence to finish.
119  */
120 boolean
swr_fence_finish(struct pipe_screen * screen,struct pipe_context * ctx,struct pipe_fence_handle * fence_handle,uint64_t timeout)121 swr_fence_finish(struct pipe_screen *screen,
122                  struct pipe_context *ctx,
123                  struct pipe_fence_handle *fence_handle,
124                  uint64_t timeout)
125 {
126    while (!swr_is_fence_done(fence_handle))
127       sched_yield();
128 
129    swr_fence(fence_handle)->pending = FALSE;
130 
131    return TRUE;
132 }
133 
134 
135 uint64_t
swr_get_timestamp(struct pipe_screen * screen)136 swr_get_timestamp(struct pipe_screen *screen)
137 {
138    return os_time_get_nano();
139 }
140 
141 
142 void
swr_fence_init(struct pipe_screen * p_screen)143 swr_fence_init(struct pipe_screen *p_screen)
144 {
145    p_screen->fence_reference = swr_fence_reference;
146    p_screen->fence_finish = swr_fence_finish;
147    p_screen->get_timestamp = swr_get_timestamp;
148 
149    /* Create persistant StoreTiles "flush" fence, used to signal completion
150     * of flushing tile state back to resource texture, via StoreTiles. */
151    struct swr_screen *screen = swr_screen(p_screen);
152    screen->flush_fence = swr_fence_create();
153 }
154