1 /**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2016 Axel Davy <axel.davy@ens.fr>
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28 /* Adapted from u_upload_mgr.
29 * Makes suballocations from bigger allocations,
30 * while enabling fast mapping. */
31
32 #include "pipe/p_defines.h"
33 #include "util/u_inlines.h"
34 #include "pipe/p_context.h"
35 #include "util/u_memory.h"
36 #include "util/u_math.h"
37 #include "util/slab.h"
38
39 #include "nine_buffer_upload.h"
40
41 #include "nine_debug.h"
42
43 #define DBG_CHANNEL (DBG_INDEXBUFFER|DBG_VERTEXBUFFER)
44
45 struct nine_buffer_group {
46 unsigned refcount; /* How many sub-buffers live inside the buffer */
47 struct pipe_resource *resource;
48 struct pipe_transfer *transfer;
49 uint8_t *map;
50 unsigned free_offset; /* Aligned offset to the upload buffer, pointing
51 * at the first unused byte. */
52 };
53
54 struct nine_subbuffer {
55 struct nine_buffer_group *parent; /* Can be NULL */
56 struct pipe_resource *resource; /* The parent resource if apply */
57 unsigned offset; /* Offset inside the resource */
58 /* If there is no parent, the resource map. Else NULL. */
59 struct pipe_transfer *transfer;
60 uint8_t *map;
61 };
62
63 struct nine_buffer_upload {
64 struct pipe_context *pipe;
65 struct slab_mempool buffer_pool;
66
67 unsigned buffers_size; /* Size of the big allocated buffers */
68 unsigned num_buffers;
69 struct nine_buffer_group *buffers;
70 };
71
72 static void
nine_upload_create_buffer_group(struct nine_buffer_upload * upload,struct nine_buffer_group * group)73 nine_upload_create_buffer_group(struct nine_buffer_upload *upload,
74 struct nine_buffer_group *group)
75 {
76 struct pipe_resource resource;
77 struct pipe_screen *screen = upload->pipe->screen;
78 DBG("%p %p\n", upload, group);
79
80 memset(&resource, 0, sizeof(resource));
81 resource.target = PIPE_BUFFER;
82 resource.format = PIPE_FORMAT_R8_UNORM;
83 resource.bind = PIPE_BIND_VERTEX_BUFFER;
84 resource.usage = PIPE_USAGE_STREAM;
85 resource.width0 = upload->buffers_size;
86 resource.height0 = 1;
87 resource.depth0 = 1;
88 resource.array_size = 1;
89 resource.flags = PIPE_RESOURCE_FLAG_MAP_PERSISTENT |
90 PIPE_RESOURCE_FLAG_MAP_COHERENT;
91
92 group->refcount = 0;
93 group->resource = screen->resource_create(screen, &resource);
94 if (group->resource == NULL)
95 return;
96
97 group->map = pipe_buffer_map_range(upload->pipe, group->resource,
98 0, upload->buffers_size,
99 PIPE_TRANSFER_WRITE |
100 PIPE_TRANSFER_PERSISTENT |
101 PIPE_TRANSFER_COHERENT,
102 &group->transfer);
103 if (group->map == NULL) {
104 group->transfer = NULL;
105 pipe_resource_reference(&group->resource, NULL);
106 return;
107 }
108
109 group->free_offset = 0;
110 }
111
112 static void
nine_upload_destroy_buffer_group(struct nine_buffer_upload * upload,struct nine_buffer_group * group)113 nine_upload_destroy_buffer_group(struct nine_buffer_upload *upload,
114 struct nine_buffer_group *group)
115 {
116 DBG("%p %p\n", upload, group);
117 assert(group->refcount == 0);
118
119 if (group->transfer)
120 pipe_transfer_unmap(upload->pipe, group->transfer);
121 if (group->resource)
122 pipe_resource_reference(&group->resource, NULL);
123 group->transfer = NULL;
124 group->map = NULL;
125 }
126
127 struct nine_buffer_upload *
nine_upload_create(struct pipe_context * pipe,unsigned buffers_size,unsigned num_buffers)128 nine_upload_create(struct pipe_context *pipe, unsigned buffers_size,
129 unsigned num_buffers)
130 {
131 struct nine_buffer_upload *upload;
132 int i;
133
134 DBG("\n");
135
136 if (!pipe->screen->get_param(pipe->screen,
137 PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT))
138 return NULL;
139
140 upload = CALLOC_STRUCT(nine_buffer_upload);
141
142 if (!upload)
143 return NULL;
144
145 slab_create(&upload->buffer_pool, sizeof(struct nine_subbuffer), 4096);
146
147 upload->pipe = pipe;
148 upload->buffers_size = align(buffers_size, 4096);
149 upload->num_buffers = num_buffers;
150
151 upload->buffers = CALLOC(num_buffers, sizeof(struct nine_buffer_group));
152 if (!upload->buffers)
153 goto buffers_fail;
154
155 for (i = 0; i < num_buffers; i++)
156 nine_upload_create_buffer_group(upload, &upload->buffers[i]);
157
158 return upload;
159
160 buffers_fail:
161 slab_destroy(&upload->buffer_pool);
162 FREE(upload);
163 return NULL;
164 }
165
166 void
nine_upload_destroy(struct nine_buffer_upload * upload)167 nine_upload_destroy(struct nine_buffer_upload *upload)
168 {
169 int i;
170
171 DBG("%p\n", upload);
172
173 for (i = 0; i < upload->num_buffers; i++)
174 nine_upload_destroy_buffer_group(upload, &upload->buffers[i]);
175 slab_destroy(&upload->buffer_pool);
176 FREE(upload);
177 }
178
179 struct nine_subbuffer *
nine_upload_create_buffer(struct nine_buffer_upload * upload,unsigned buffer_size)180 nine_upload_create_buffer(struct nine_buffer_upload *upload,
181 unsigned buffer_size)
182 {
183 struct nine_subbuffer *buf = slab_alloc_st(&upload->buffer_pool);
184 struct nine_buffer_group *group = NULL;
185 unsigned size = align(buffer_size, 4096);
186 int i = 0;
187
188 DBG("%p %d\n", upload, buffer_size);
189
190 if (!buf)
191 return NULL;
192
193 for (i = 0; i < upload->num_buffers; i++) {
194 group = &upload->buffers[i];
195 if (group->resource &&
196 group->free_offset + size <= upload->buffers_size)
197 break;
198 }
199
200 if (i == upload->num_buffers) {
201 /* Allocate lonely buffer */
202 struct pipe_resource resource;
203 struct pipe_screen *screen = upload->pipe->screen;
204
205 DBG("Allocating buffer\n");
206 buf->parent = NULL;
207
208 memset(&resource, 0, sizeof(resource));
209 resource.target = PIPE_BUFFER;
210 resource.format = PIPE_FORMAT_R8_UNORM;
211 resource.bind = PIPE_BIND_VERTEX_BUFFER;
212 resource.usage = PIPE_USAGE_STREAM;
213 resource.width0 = buffer_size;
214 resource.height0 = 1;
215 resource.depth0 = 1;
216 resource.array_size = 1;
217 resource.flags = PIPE_RESOURCE_FLAG_MAP_PERSISTENT |
218 PIPE_RESOURCE_FLAG_MAP_COHERENT;
219
220 buf->resource = screen->resource_create(screen, &resource);
221 if (buf->resource == NULL) {
222 slab_free_st(&upload->buffer_pool, buf);
223 return NULL;
224 }
225
226 buf->map = pipe_buffer_map_range(upload->pipe, buf->resource,
227 0, buffer_size,
228 PIPE_TRANSFER_WRITE |
229 PIPE_TRANSFER_PERSISTENT |
230 PIPE_TRANSFER_COHERENT,
231 &buf->transfer);
232 if (buf->map == NULL) {
233 pipe_resource_reference(&buf->resource, NULL);
234 slab_free_st(&upload->buffer_pool, buf);
235 return NULL;
236 }
237 buf->offset = 0;
238 return buf;
239 }
240
241 DBG("Using buffer group %d\n", i);
242
243 buf->parent = group;
244 buf->resource = NULL;
245 pipe_resource_reference(&buf->resource, group->resource);
246 buf->offset = group->free_offset;
247
248 group->free_offset += size;
249 group->refcount += 1;
250
251 return buf;
252 }
253
254 void
nine_upload_release_buffer(struct nine_buffer_upload * upload,struct nine_subbuffer * buf)255 nine_upload_release_buffer(struct nine_buffer_upload *upload,
256 struct nine_subbuffer *buf)
257 {
258 DBG("%p %p %p\n", upload, buf, buf->parent);
259
260 if (buf->parent) {
261 pipe_resource_reference(&buf->resource, NULL);
262 buf->parent->refcount--;
263 if (buf->parent->refcount == 0) {
264 /* Allocate new buffer */
265 nine_upload_destroy_buffer_group(upload, buf->parent);
266 nine_upload_create_buffer_group(upload, buf->parent);
267 }
268 } else {
269 /* lonely buffer */
270 if (buf->transfer)
271 pipe_transfer_unmap(upload->pipe, buf->transfer);
272 pipe_resource_reference(&buf->resource, NULL);
273 }
274
275 slab_free_st(&upload->buffer_pool, buf);
276 }
277
278 uint8_t *
nine_upload_buffer_get_map(struct nine_subbuffer * buf)279 nine_upload_buffer_get_map(struct nine_subbuffer *buf)
280 {
281 if (buf->parent) {
282 return buf->parent->map + buf->offset;
283 }
284 /* lonely buffer */
285 return buf->map;
286 }
287
288 struct pipe_resource *
nine_upload_buffer_resource_and_offset(struct nine_subbuffer * buf,unsigned * offset)289 nine_upload_buffer_resource_and_offset(struct nine_subbuffer *buf,
290 unsigned *offset)
291 {
292 *offset = buf->offset;
293 return buf->resource;
294 }
295