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      1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
      2 
      3 /*
      4  * Copyright (C) 2012 Rob Clark <robclark (at) freedesktop.org>
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     23  * SOFTWARE.
     24  *
     25  * Authors:
     26  *    Rob Clark <robclark (at) freedesktop.org>
     27  */
     28 
     29 #include <libsync.h>
     30 
     31 #include "util/u_inlines.h"
     32 
     33 #include "freedreno_fence.h"
     34 #include "freedreno_context.h"
     35 #include "freedreno_util.h"
     36 
     37 struct pipe_fence_handle {
     38 	struct pipe_reference reference;
     39 	/* fence holds a weak reference to the batch until the batch is flushed,
     40 	 * at which point fd_fence_populate() is called and timestamp and possibly
     41 	 * fence_fd become valid and the week reference is dropped.
     42 	 */
     43 	struct fd_batch *batch;
     44 	struct fd_context *ctx;
     45 	struct fd_screen *screen;
     46 	int fence_fd;
     47 	uint32_t timestamp;
     48 };
     49 
     50 static void fence_flush(struct pipe_fence_handle *fence)
     51 {
     52 	if (fence->batch)
     53 		fd_batch_flush(fence->batch, true, true);
     54 	debug_assert(!fence->batch);
     55 }
     56 
     57 void fd_fence_populate(struct pipe_fence_handle *fence,
     58 		uint32_t timestamp, int fence_fd)
     59 {
     60 	if (!fence->batch)
     61 		return;
     62 	fence->timestamp = timestamp;
     63 	fence->fence_fd = fence_fd;
     64 	fence->batch = NULL;
     65 }
     66 
     67 static void fd_fence_destroy(struct pipe_fence_handle *fence)
     68 {
     69 	if (fence->fence_fd != -1)
     70 		close(fence->fence_fd);
     71 	FREE(fence);
     72 }
     73 
     74 void fd_fence_ref(struct pipe_screen *pscreen,
     75 		struct pipe_fence_handle **ptr,
     76 		struct pipe_fence_handle *pfence)
     77 {
     78 	if (pipe_reference(&(*ptr)->reference, &pfence->reference))
     79 		fd_fence_destroy(*ptr);
     80 
     81 	*ptr = pfence;
     82 }
     83 
     84 boolean fd_fence_finish(struct pipe_screen *pscreen,
     85 		struct pipe_context *ctx,
     86 		struct pipe_fence_handle *fence,
     87 		uint64_t timeout)
     88 {
     89 	fence_flush(fence);
     90 
     91 	if (fence->fence_fd != -1) {
     92 		int ret = sync_wait(fence->fence_fd, timeout / 1000000);
     93 		return ret == 0;
     94 	}
     95 
     96 	if (fd_pipe_wait_timeout(fence->ctx->pipe, fence->timestamp, timeout))
     97 		return false;
     98 
     99 	return true;
    100 }
    101 
    102 static struct pipe_fence_handle * fence_create(struct fd_context *ctx,
    103 		struct fd_batch *batch, uint32_t timestamp, int fence_fd)
    104 {
    105 	struct pipe_fence_handle *fence;
    106 
    107 	fence = CALLOC_STRUCT(pipe_fence_handle);
    108 	if (!fence)
    109 		return NULL;
    110 
    111 	pipe_reference_init(&fence->reference, 1);
    112 
    113 	fence->batch = batch;
    114 	fence->ctx = ctx;
    115 	fence->screen = ctx->screen;
    116 	fence->timestamp = timestamp;
    117 	fence->fence_fd = fence_fd;
    118 
    119 	return fence;
    120 }
    121 
    122 void fd_create_fence_fd(struct pipe_context *pctx,
    123 		struct pipe_fence_handle **pfence, int fd)
    124 {
    125 	*pfence = fence_create(fd_context(pctx), NULL, 0, dup(fd));
    126 }
    127 
    128 void fd_fence_server_sync(struct pipe_context *pctx,
    129 		struct pipe_fence_handle *fence)
    130 {
    131 	struct fd_context *ctx = fd_context(pctx);
    132 	struct fd_batch *batch = ctx->batch;
    133 
    134 	fence_flush(fence);
    135 
    136 	if (sync_accumulate("freedreno", &batch->in_fence_fd, fence->fence_fd)) {
    137 		/* error */
    138 	}
    139 }
    140 
    141 int fd_fence_get_fd(struct pipe_screen *pscreen,
    142 		struct pipe_fence_handle *fence)
    143 {
    144 	fence_flush(fence);
    145 	return dup(fence->fence_fd);
    146 }
    147 
    148 struct pipe_fence_handle * fd_fence_create(struct fd_batch *batch)
    149 {
    150 	return fence_create(batch->ctx, batch, 0, -1);
    151 }
    152