1 /**************************************************************************
2 *
3 * Copyright 2013 Advanced Micro Devices, Inc.
4 *
5 * SPDX-License-Identifier: MIT
6 *
7 **************************************************************************/
8
9 #include "radeon_video.h"
10
11 #include "radeon_vce.h"
12 #include "radeonsi/si_pipe.h"
13 #include "util/u_memory.h"
14 #include "util/u_video.h"
15 #include "vl/vl_defines.h"
16 #include "vl/vl_video_buffer.h"
17
18 #include <unistd.h>
19
20 /* generate an stream handle */
si_vid_alloc_stream_handle()21 unsigned si_vid_alloc_stream_handle()
22 {
23 static unsigned counter = 0;
24 unsigned stream_handle = 0;
25 unsigned pid = getpid();
26 int i;
27
28 for (i = 0; i < 32; ++i)
29 stream_handle |= ((pid >> i) & 1) << (31 - i);
30
31 stream_handle ^= ++counter;
32 return stream_handle;
33 }
34
35 /* create a buffer in the winsys */
si_vid_create_buffer(struct pipe_screen * screen,struct rvid_buffer * buffer,unsigned size,unsigned usage)36 bool si_vid_create_buffer(struct pipe_screen *screen, struct rvid_buffer *buffer, unsigned size,
37 unsigned usage)
38 {
39 memset(buffer, 0, sizeof(*buffer));
40 buffer->usage = usage;
41
42 /* Hardware buffer placement restrictions require the kernel to be
43 * able to move buffers around individually, so request a
44 * non-sub-allocated buffer.
45 */
46 buffer->res = si_resource(pipe_buffer_create(screen, PIPE_BIND_CUSTOM, usage, size));
47
48 return buffer->res != NULL;
49 }
50
51 /* create a tmz buffer in the winsys */
si_vid_create_tmz_buffer(struct pipe_screen * screen,struct rvid_buffer * buffer,unsigned size,unsigned usage)52 bool si_vid_create_tmz_buffer(struct pipe_screen *screen, struct rvid_buffer *buffer, unsigned size,
53 unsigned usage)
54 {
55 memset(buffer, 0, sizeof(*buffer));
56 buffer->usage = usage;
57 buffer->res = si_resource(pipe_buffer_create(screen, PIPE_BIND_CUSTOM | PIPE_BIND_PROTECTED,
58 usage, size));
59 return buffer->res != NULL;
60 }
61
62
63 /* destroy a buffer */
si_vid_destroy_buffer(struct rvid_buffer * buffer)64 void si_vid_destroy_buffer(struct rvid_buffer *buffer)
65 {
66 si_resource_reference(&buffer->res, NULL);
67 }
68
69 /* reallocate a buffer, preserving its content */
si_vid_resize_buffer(struct pipe_screen * screen,struct radeon_cmdbuf * cs,struct rvid_buffer * new_buf,unsigned new_size,struct rvid_buf_offset_info * buf_ofst_info)70 bool si_vid_resize_buffer(struct pipe_screen *screen, struct radeon_cmdbuf *cs,
71 struct rvid_buffer *new_buf, unsigned new_size,
72 struct rvid_buf_offset_info *buf_ofst_info)
73 {
74 struct si_screen *sscreen = (struct si_screen *)screen;
75 struct radeon_winsys *ws = sscreen->ws;
76 unsigned bytes = MIN2(new_buf->res->buf->size, new_size);
77 struct rvid_buffer old_buf = *new_buf;
78 void *src = NULL, *dst = NULL;
79
80 if (!si_vid_create_buffer(screen, new_buf, new_size, new_buf->usage))
81 goto error;
82
83 src = ws->buffer_map(ws, old_buf.res->buf, cs, PIPE_MAP_READ | RADEON_MAP_TEMPORARY);
84 if (!src)
85 goto error;
86
87 dst = ws->buffer_map(ws, new_buf->res->buf, cs, PIPE_MAP_WRITE | RADEON_MAP_TEMPORARY);
88 if (!dst)
89 goto error;
90
91 if (buf_ofst_info) {
92 memset(dst, 0, new_size);
93 for(int i =0; i < buf_ofst_info->num_units; i++) {
94 memcpy(dst, src, buf_ofst_info->old_offset);
95 dst += buf_ofst_info->new_offset;
96 src += buf_ofst_info->old_offset;
97 }
98 } else {
99 memcpy(dst, src, bytes);
100 if (new_size > bytes) {
101 new_size -= bytes;
102 dst += bytes;
103 memset(dst, 0, new_size);
104 }
105 }
106 ws->buffer_unmap(ws, new_buf->res->buf);
107 ws->buffer_unmap(ws, old_buf.res->buf);
108 si_vid_destroy_buffer(&old_buf);
109 return true;
110
111 error:
112 if (src)
113 ws->buffer_unmap(ws, old_buf.res->buf);
114 si_vid_destroy_buffer(new_buf);
115 *new_buf = old_buf;
116 return false;
117 }
118
119 /* clear the buffer with zeros */
si_vid_clear_buffer(struct pipe_context * context,struct rvid_buffer * buffer)120 void si_vid_clear_buffer(struct pipe_context *context, struct rvid_buffer *buffer)
121 {
122 struct si_context *sctx = (struct si_context *)context;
123 uint32_t zero = 0;
124
125 sctx->b.clear_buffer(&sctx->b, &buffer->res->b.b, 0, buffer->res->b.b.width0, &zero, 4);
126 context->flush(context, NULL, 0);
127 }
128