1/**************************************************************************
2 *
3 * Copyright 2013 Advanced Micro Devices, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "radeon_video.h"
29
30#include "radeon_vce.h"
31#include "radeonsi/si_pipe.h"
32#include "util/u_memory.h"
33#include "util/u_video.h"
34#include "vl/vl_defines.h"
35#include "vl/vl_video_buffer.h"
36
37#include <unistd.h>
38
39/* generate an stream handle */
40unsigned si_vid_alloc_stream_handle()
41{
42   static unsigned counter = 0;
43   unsigned stream_handle = 0;
44   unsigned pid = getpid();
45   int i;
46
47   for (i = 0; i < 32; ++i)
48      stream_handle |= ((pid >> i) & 1) << (31 - i);
49
50   stream_handle ^= ++counter;
51   return stream_handle;
52}
53
54/* create a buffer in the winsys */
55bool si_vid_create_buffer(struct pipe_screen *screen, struct rvid_buffer *buffer, unsigned size,
56                          unsigned usage)
57{
58   memset(buffer, 0, sizeof(*buffer));
59   buffer->usage = usage;
60
61   /* Hardware buffer placement restrictions require the kernel to be
62    * able to move buffers around individually, so request a
63    * non-sub-allocated buffer.
64    */
65   buffer->res = si_resource(pipe_buffer_create(screen, PIPE_BIND_SHARED, usage, size));
66
67   return buffer->res != NULL;
68}
69
70/* create a tmz buffer in the winsys */
71bool si_vid_create_tmz_buffer(struct pipe_screen *screen, struct rvid_buffer *buffer, unsigned size,
72                              unsigned usage)
73{
74   memset(buffer, 0, sizeof(*buffer));
75   buffer->usage = usage;
76   buffer->res = si_resource(pipe_buffer_create(screen, PIPE_BIND_SHARED | PIPE_BIND_PROTECTED,
77                                                usage, size));
78   return buffer->res != NULL;
79}
80
81
82/* destroy a buffer */
83void si_vid_destroy_buffer(struct rvid_buffer *buffer)
84{
85   si_resource_reference(&buffer->res, NULL);
86}
87
88/* reallocate a buffer, preserving its content */
89bool si_vid_resize_buffer(struct pipe_screen *screen, struct radeon_cmdbuf *cs,
90                          struct rvid_buffer *new_buf, unsigned new_size)
91{
92   struct si_screen *sscreen = (struct si_screen *)screen;
93   struct radeon_winsys *ws = sscreen->ws;
94   unsigned bytes = MIN2(new_buf->res->buf->size, new_size);
95   struct rvid_buffer old_buf = *new_buf;
96   void *src = NULL, *dst = NULL;
97
98   if (!si_vid_create_buffer(screen, new_buf, new_size, new_buf->usage))
99      goto error;
100
101   src = ws->buffer_map(ws, old_buf.res->buf, cs, PIPE_MAP_READ | RADEON_MAP_TEMPORARY);
102   if (!src)
103      goto error;
104
105   dst = ws->buffer_map(ws, new_buf->res->buf, cs, PIPE_MAP_WRITE | RADEON_MAP_TEMPORARY);
106   if (!dst)
107      goto error;
108
109   memcpy(dst, src, bytes);
110   if (new_size > bytes) {
111      new_size -= bytes;
112      dst += bytes;
113      memset(dst, 0, new_size);
114   }
115   ws->buffer_unmap(ws, new_buf->res->buf);
116   ws->buffer_unmap(ws, old_buf.res->buf);
117   si_vid_destroy_buffer(&old_buf);
118   return true;
119
120error:
121   if (src)
122      ws->buffer_unmap(ws, old_buf.res->buf);
123   si_vid_destroy_buffer(new_buf);
124   *new_buf = old_buf;
125   return false;
126}
127
128/* clear the buffer with zeros */
129void si_vid_clear_buffer(struct pipe_context *context, struct rvid_buffer *buffer)
130{
131   struct si_context *sctx = (struct si_context *)context;
132   uint32_t zero = 0;
133
134   sctx->b.clear_buffer(&sctx->b, &buffer->res->b.b, 0, buffer->res->b.b.width0, &zero, 4);
135   context->flush(context, NULL, 0);
136}
137