1 /**************************************************************************
2 *
3 * Copyright 2006 VMware, 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 VMWARE AND/OR ITS SUPPLIERS 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 /* Provide additional functionality on top of bufmgr buffers:
29 * - 2d semantics and blit operations
30 * - refcounting of buffers for multiple images in a buffer.
31 * - refcounting of buffer mappings.
32 * - some logic for moving the buffers to the best memory pools for
33 * given operations.
34 *
35 * Most of this is to make it easier to implement the fixed-layout
36 * mipmap tree required by intel hardware in the face of GL's
37 * programming interface where each image can be specifed in random
38 * order and it isn't clear what layout the tree should have until the
39 * last moment.
40 */
41
42 #include <sys/ioctl.h>
43 #include <errno.h>
44
45 #include "main/hash.h"
46 #include "intel_context.h"
47 #include "intel_regions.h"
48 #include "intel_blit.h"
49 #include "intel_buffer_objects.h"
50 #include "intel_bufmgr.h"
51 #include "intel_batchbuffer.h"
52
53 #define FILE_DEBUG_FLAG DEBUG_REGION
54
55 /* This should be set to the maximum backtrace size desired.
56 * Set it to 0 to disable backtrace debugging.
57 */
58 #define DEBUG_BACKTRACE_SIZE 0
59
60 #if DEBUG_BACKTRACE_SIZE == 0 || !defined(HAVE_EXECINFO_H)
61 /* Use the standard debug output */
62 #define _DBG(...) DBG(__VA_ARGS__)
63 #else
64 /* Use backtracing debug output */
65 #define _DBG(...) {debug_backtrace(); DBG(__VA_ARGS__);}
66
67 /* Backtracing debug support */
68 #include <execinfo.h>
69
70 static void
debug_backtrace(void)71 debug_backtrace(void)
72 {
73 void *trace[DEBUG_BACKTRACE_SIZE];
74 char **strings = NULL;
75 int traceSize;
76 register int i;
77
78 traceSize = backtrace(trace, DEBUG_BACKTRACE_SIZE);
79 strings = backtrace_symbols(trace, traceSize);
80 if (strings == NULL) {
81 DBG("no backtrace:");
82 return;
83 }
84
85 /* Spit out all the strings with a colon separator. Ignore
86 * the first, since we don't really care about the call
87 * to debug_backtrace() itself. Skip until the final "/" in
88 * the trace to avoid really long lines.
89 */
90 for (i = 1; i < traceSize; i++) {
91 char *p = strings[i], *slash = strings[i];
92 while (*p) {
93 if (*p++ == '/') {
94 slash = p;
95 }
96 }
97
98 DBG("%s:", slash);
99 }
100
101 /* Free up the memory, and we're done */
102 free(strings);
103 }
104
105 #endif
106
107 static struct intel_region *
intel_region_alloc_internal(struct intel_screen * screen,GLuint cpp,GLuint width,GLuint height,GLuint pitch,uint32_t tiling,drm_intel_bo * buffer)108 intel_region_alloc_internal(struct intel_screen *screen,
109 GLuint cpp,
110 GLuint width, GLuint height, GLuint pitch,
111 uint32_t tiling, drm_intel_bo *buffer)
112 {
113 struct intel_region *region;
114
115 region = calloc(sizeof(*region), 1);
116 if (region == NULL)
117 return region;
118
119 region->cpp = cpp;
120 region->width = width;
121 region->height = height;
122 region->pitch = pitch;
123 region->refcount = 1;
124 region->bo = buffer;
125 region->tiling = tiling;
126
127 _DBG("%s <-- %p\n", __func__, region);
128 return region;
129 }
130
131 struct intel_region *
intel_region_alloc(struct intel_screen * screen,uint32_t tiling,GLuint cpp,GLuint width,GLuint height,bool expect_accelerated_upload)132 intel_region_alloc(struct intel_screen *screen,
133 uint32_t tiling,
134 GLuint cpp, GLuint width, GLuint height,
135 bool expect_accelerated_upload)
136 {
137 drm_intel_bo *buffer;
138 unsigned long flags = 0;
139 unsigned long aligned_pitch;
140 struct intel_region *region;
141
142 if (expect_accelerated_upload)
143 flags |= BO_ALLOC_FOR_RENDER;
144
145 buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "region",
146 width, height, cpp,
147 &tiling, &aligned_pitch, flags);
148 if (buffer == NULL)
149 return NULL;
150
151 region = intel_region_alloc_internal(screen, cpp, width, height,
152 aligned_pitch, tiling, buffer);
153 if (region == NULL) {
154 drm_intel_bo_unreference(buffer);
155 return NULL;
156 }
157
158 return region;
159 }
160
161 bool
intel_region_flink(struct intel_region * region,uint32_t * name)162 intel_region_flink(struct intel_region *region, uint32_t *name)
163 {
164 if (region->name == 0) {
165 if (drm_intel_bo_flink(region->bo, ®ion->name))
166 return false;
167 }
168
169 *name = region->name;
170
171 return true;
172 }
173
174 struct intel_region *
intel_region_alloc_for_handle(struct intel_screen * screen,GLuint cpp,GLuint width,GLuint height,GLuint pitch,GLuint handle,const char * name)175 intel_region_alloc_for_handle(struct intel_screen *screen,
176 GLuint cpp,
177 GLuint width, GLuint height, GLuint pitch,
178 GLuint handle, const char *name)
179 {
180 struct intel_region *region;
181 drm_intel_bo *buffer;
182 int ret;
183 uint32_t bit_6_swizzle, tiling;
184
185 buffer = drm_intel_bo_gem_create_from_name(screen->bufmgr, name, handle);
186 if (buffer == NULL)
187 return NULL;
188 ret = drm_intel_bo_get_tiling(buffer, &tiling, &bit_6_swizzle);
189 if (ret != 0) {
190 fprintf(stderr, "Couldn't get tiling of buffer %d (%s): %s\n",
191 handle, name, strerror(-ret));
192 drm_intel_bo_unreference(buffer);
193 return NULL;
194 }
195
196 region = intel_region_alloc_internal(screen, cpp,
197 width, height, pitch, tiling, buffer);
198 if (region == NULL) {
199 drm_intel_bo_unreference(buffer);
200 return NULL;
201 }
202
203 region->name = handle;
204
205 return region;
206 }
207
208 struct intel_region *
intel_region_alloc_for_fd(struct intel_screen * screen,GLuint cpp,GLuint width,GLuint height,GLuint pitch,GLuint size,int fd,const char * name)209 intel_region_alloc_for_fd(struct intel_screen *screen,
210 GLuint cpp,
211 GLuint width, GLuint height, GLuint pitch,
212 GLuint size,
213 int fd, const char *name)
214 {
215 struct intel_region *region;
216 drm_intel_bo *buffer;
217 int ret;
218 uint32_t bit_6_swizzle, tiling;
219
220 buffer = drm_intel_bo_gem_create_from_prime(screen->bufmgr, fd, size);
221 if (buffer == NULL)
222 return NULL;
223 ret = drm_intel_bo_get_tiling(buffer, &tiling, &bit_6_swizzle);
224 if (ret != 0) {
225 fprintf(stderr, "Couldn't get tiling of buffer (%s): %s\n",
226 name, strerror(-ret));
227 drm_intel_bo_unreference(buffer);
228 return NULL;
229 }
230
231 region = intel_region_alloc_internal(screen, cpp,
232 width, height, pitch, tiling, buffer);
233 if (region == NULL) {
234 drm_intel_bo_unreference(buffer);
235 return NULL;
236 }
237
238 return region;
239 }
240
241 void
intel_region_reference(struct intel_region ** dst,struct intel_region * src)242 intel_region_reference(struct intel_region **dst, struct intel_region *src)
243 {
244 _DBG("%s: %p(%d) -> %p(%d)\n", __func__,
245 *dst, *dst ? (*dst)->refcount : 0, src, src ? src->refcount : 0);
246
247 if (src != *dst) {
248 if (*dst)
249 intel_region_release(dst);
250
251 if (src)
252 src->refcount++;
253 *dst = src;
254 }
255 }
256
257 void
intel_region_release(struct intel_region ** region_handle)258 intel_region_release(struct intel_region **region_handle)
259 {
260 struct intel_region *region = *region_handle;
261
262 if (region == NULL) {
263 _DBG("%s NULL\n", __func__);
264 return;
265 }
266
267 _DBG("%s %p %d\n", __func__, region, region->refcount - 1);
268
269 assert(region->refcount > 0);
270 region->refcount--;
271
272 if (region->refcount == 0) {
273 drm_intel_bo_unreference(region->bo);
274
275 free(region);
276 }
277 *region_handle = NULL;
278 }
279
280 /**
281 * This function computes masks that may be used to select the bits of the X
282 * and Y coordinates that indicate the offset within a tile. If the region is
283 * untiled, the masks are set to 0.
284 */
285 void
intel_region_get_tile_masks(struct intel_region * region,uint32_t * mask_x,uint32_t * mask_y)286 intel_region_get_tile_masks(struct intel_region *region,
287 uint32_t *mask_x, uint32_t *mask_y)
288 {
289 int cpp = region->cpp;
290 uint32_t tiling = region->tiling;
291
292 switch (tiling) {
293 default:
294 assert(false);
295 case I915_TILING_NONE:
296 *mask_x = *mask_y = 0;
297 break;
298 case I915_TILING_X:
299 *mask_x = 512 / cpp - 1;
300 *mask_y = 7;
301 break;
302 case I915_TILING_Y:
303 *mask_x = 128 / cpp - 1;
304 *mask_y = 31;
305 break;
306 }
307 }
308
309 /**
310 * Compute the offset (in bytes) from the start of the region to the given x
311 * and y coordinate. For tiled regions, caller must ensure that x and y are
312 * multiples of the tile size.
313 */
314 uint32_t
intel_region_get_aligned_offset(struct intel_region * region,uint32_t x,uint32_t y)315 intel_region_get_aligned_offset(struct intel_region *region, uint32_t x,
316 uint32_t y)
317 {
318 int cpp = region->cpp;
319 uint32_t pitch = region->pitch;
320 uint32_t tiling = region->tiling;
321
322 switch (tiling) {
323 default:
324 assert(false);
325 case I915_TILING_NONE:
326 return y * pitch + x * cpp;
327 case I915_TILING_X:
328 assert((x % (512 / cpp)) == 0);
329 assert((y % 8) == 0);
330 return y * pitch + x / (512 / cpp) * 4096;
331 case I915_TILING_Y:
332 assert((x % (128 / cpp)) == 0);
333 assert((y % 32) == 0);
334 return y * pitch + x / (128 / cpp) * 4096;
335 }
336 }
337