1 /**************************************************************************
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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 TUNGSTEN GRAPHICS 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.
26 **************************************************************************/
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
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
42 #include <sys/ioctl.h>
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"
53 #define FILE_DEBUG_FLAG DEBUG_REGION
55 /* This should be set to the maximum backtrace size desired.
56 * Set it to 0 to disable backtrace debugging.
58 #define DEBUG_BACKTRACE_SIZE 0
60 #if DEBUG_BACKTRACE_SIZE == 0
61 /* Use the standard debug output */
62 #define _DBG(...) DBG(__VA_ARGS__)
64 /* Use backtracing debug output */
65 #define _DBG(...) {debug_backtrace(); DBG(__VA_ARGS__);}
67 /* Backtracing debug support */
73 void *trace[DEBUG_BACKTRACE_SIZE];
74 char **strings = NULL;
78 traceSize = backtrace(trace, DEBUG_BACKTRACE_SIZE);
79 strings = backtrace_symbols(trace, traceSize);
80 if (strings == NULL) {
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.
90 for (i = 1; i < traceSize; i++) {
91 char *p = strings[i], *slash = strings[i];
101 /* Free up the memory, and we're done */
109 /* XXX: Thread safety?
112 intel_region_map(struct intel_context *intel, struct intel_region *region)
114 intel_flush(&intel->ctx);
116 _DBG("%s %p\n", __FUNCTION__, region);
117 if (!region->map_refcount++) {
119 intel_region_cow(intel, region);
121 if (region->tiling != I915_TILING_NONE)
122 drm_intel_gem_bo_map_gtt(region->buffer);
124 drm_intel_bo_map(region->buffer, GL_TRUE);
125 region->map = region->buffer->virtual;
132 intel_region_unmap(struct intel_context *intel, struct intel_region *region)
134 _DBG("%s %p\n", __FUNCTION__, region);
135 if (!--region->map_refcount) {
136 if (region->tiling != I915_TILING_NONE)
137 drm_intel_gem_bo_unmap_gtt(region->buffer);
139 drm_intel_bo_unmap(region->buffer);
144 static struct intel_region *
145 intel_region_alloc_internal(struct intel_screen *screen,
147 GLuint width, GLuint height, GLuint pitch,
148 uint32_t tiling, drm_intel_bo *buffer)
150 struct intel_region *region;
152 region = calloc(sizeof(*region), 1);
157 region->width = width;
158 region->height = height;
159 region->pitch = pitch;
160 region->refcount = 1;
161 region->buffer = buffer;
162 region->tiling = tiling;
163 region->screen = screen;
165 _DBG("%s <-- %p\n", __FUNCTION__, region);
169 struct intel_region *
170 intel_region_alloc(struct intel_screen *screen,
172 GLuint cpp, GLuint width, GLuint height,
173 GLboolean expect_accelerated_upload)
175 drm_intel_bo *buffer;
176 unsigned long flags = 0;
177 unsigned long aligned_pitch;
178 struct intel_region *region;
180 if (expect_accelerated_upload)
181 flags |= BO_ALLOC_FOR_RENDER;
183 buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "region",
185 &tiling, &aligned_pitch, flags);
189 region = intel_region_alloc_internal(screen, cpp, width, height,
190 aligned_pitch / cpp, tiling, buffer);
191 if (region == NULL) {
192 drm_intel_bo_unreference(buffer);
200 intel_region_flink(struct intel_region *region, uint32_t *name)
202 if (region->name == 0) {
203 if (drm_intel_bo_flink(region->buffer, ®ion->name))
206 _mesa_HashInsert(region->screen->named_regions,
207 region->name, region);
210 *name = region->name;
215 struct intel_region *
216 intel_region_alloc_for_handle(struct intel_screen *screen,
218 GLuint width, GLuint height, GLuint pitch,
219 GLuint handle, const char *name)
221 struct intel_region *region, *dummy;
222 drm_intel_bo *buffer;
224 uint32_t bit_6_swizzle, tiling;
226 region = _mesa_HashLookup(screen->named_regions, handle);
227 if (region != NULL) {
229 if (region->width != width || region->height != height ||
230 region->cpp != cpp || region->pitch != pitch) {
232 "Region for name %d already exists but is not compatible\n",
236 intel_region_reference(&dummy, region);
240 buffer = intel_bo_gem_create_from_name(screen->bufmgr, name, handle);
243 ret = drm_intel_bo_get_tiling(buffer, &tiling, &bit_6_swizzle);
245 fprintf(stderr, "Couldn't get tiling of buffer %d (%s): %s\n",
246 handle, name, strerror(-ret));
247 drm_intel_bo_unreference(buffer);
251 region = intel_region_alloc_internal(screen, cpp,
252 width, height, pitch, tiling, buffer);
253 if (region == NULL) {
254 drm_intel_bo_unreference(buffer);
258 region->name = handle;
259 _mesa_HashInsert(screen->named_regions, handle, region);
265 intel_region_reference(struct intel_region **dst, struct intel_region *src)
267 _DBG("%s: %p(%d) -> %p(%d)\n", __FUNCTION__,
268 *dst, *dst ? (*dst)->refcount : 0, src, src ? src->refcount : 0);
272 intel_region_release(dst);
281 intel_region_release(struct intel_region **region_handle)
283 struct intel_region *region = *region_handle;
285 if (region == NULL) {
286 _DBG("%s NULL\n", __FUNCTION__);
290 _DBG("%s %p %d\n", __FUNCTION__, region, region->refcount - 1);
292 ASSERT(region->refcount > 0);
295 if (region->refcount == 0) {
296 assert(region->map_refcount == 0);
299 region->pbo->region = NULL;
301 drm_intel_bo_unreference(region->buffer);
303 if (region->name > 0)
304 _mesa_HashRemove(region->screen->named_regions, region->name);
308 *region_handle = NULL;
312 * XXX Move this into core Mesa?
315 _mesa_copy_rect(GLubyte * dst,
323 GLuint src_pitch, GLuint src_x, GLuint src_y)
331 dst += dst_y * dst_pitch;
332 src += src_y * src_pitch;
335 if (width == dst_pitch && width == src_pitch)
336 memcpy(dst, src, height * width);
338 for (i = 0; i < height; i++) {
339 memcpy(dst, src, width);
347 /* Upload data to a rectangular sub-region. Lots of choices how to do this:
349 * - memcpy by span to current destination
350 * - upload data as new buffer and blit
352 * Currently always memcpy.
355 intel_region_data(struct intel_context *intel,
356 struct intel_region *dst,
358 GLuint dstx, GLuint dsty,
359 const void *src, GLuint src_pitch,
360 GLuint srcx, GLuint srcy, GLuint width, GLuint height)
362 _DBG("%s\n", __FUNCTION__);
369 dsty == 0 && width == dst->pitch && height == dst->height)
370 intel_region_release_pbo(intel, dst);
372 intel_region_cow(intel, dst);
375 intel_prepare_render(intel);
377 _mesa_copy_rect(intel_region_map(intel, dst) + dst_offset,
380 dstx, dsty, width, height, src, src_pitch, srcx, srcy);
382 intel_region_unmap(intel, dst);
385 /* Copy rectangular sub-regions. Need better logic about when to
386 * push buffers into AGP - will currently do so whenever possible.
389 intel_region_copy(struct intel_context *intel,
390 struct intel_region *dst,
392 GLuint dstx, GLuint dsty,
393 struct intel_region *src,
395 GLuint srcx, GLuint srcy, GLuint width, GLuint height,
399 uint32_t src_pitch = src->pitch;
401 _DBG("%s\n", __FUNCTION__);
408 dsty == 0 && width == dst->pitch && height == dst->height)
409 intel_region_release_pbo(intel, dst);
411 intel_region_cow(intel, dst);
414 assert(src->cpp == dst->cpp);
417 src_pitch = -src_pitch;
419 return intelEmitCopyBlit(intel,
421 src_pitch, src->buffer, src_offset, src->tiling,
422 dst->pitch, dst->buffer, dst_offset, dst->tiling,
423 srcx, srcy, dstx, dsty, width, height,
427 /* Attach to a pbo, discarding our data. Effectively zero-copy upload
431 intel_region_attach_pbo(struct intel_context *intel,
432 struct intel_region *region,
433 struct intel_buffer_object *pbo)
435 drm_intel_bo *buffer;
437 if (region->pbo == pbo)
440 _DBG("%s %p %p\n", __FUNCTION__, region, pbo);
442 /* If there is already a pbo attached, break the cow tie now.
443 * Don't call intel_region_release_pbo() as that would
444 * unnecessarily allocate a new buffer we would have to immediately
448 region->pbo->region = NULL;
452 if (region->buffer) {
453 drm_intel_bo_unreference(region->buffer);
454 region->buffer = NULL;
457 /* make sure pbo has a buffer of its own */
458 buffer = intel_bufferobj_buffer(intel, pbo, INTEL_WRITE_FULL);
461 region->pbo->region = region;
462 drm_intel_bo_reference(buffer);
463 region->buffer = buffer;
464 region->tiling = I915_TILING_NONE;
468 /* Break the COW tie to the pbo and allocate a new buffer.
469 * The pbo gets to keep the data.
472 intel_region_release_pbo(struct intel_context *intel,
473 struct intel_region *region)
475 _DBG("%s %p\n", __FUNCTION__, region);
476 assert(region->buffer == region->pbo->buffer);
477 region->pbo->region = NULL;
479 drm_intel_bo_unreference(region->buffer);
480 region->buffer = NULL;
482 region->buffer = drm_intel_bo_alloc(intel->bufmgr, "region",
483 region->pitch * region->cpp *
488 /* Break the COW tie to the pbo. Both the pbo and the region end up
489 * with a copy of the data.
492 intel_region_cow(struct intel_context *intel, struct intel_region *region)
494 struct intel_buffer_object *pbo = region->pbo;
497 intel_region_release_pbo(intel, region);
499 assert(region->cpp * region->pitch * region->height == pbo->Base.Size);
501 _DBG("%s %p (%d bytes)\n", __FUNCTION__, region, (int)pbo->Base.Size);
503 /* Now blit from the texture buffer to the new buffer:
506 intel_prepare_render(intel);
507 ok = intelEmitCopyBlit(intel,
509 region->pitch, pbo->buffer, 0, region->tiling,
510 region->pitch, region->buffer, 0, region->tiling,
512 region->pitch, region->height,
518 intel_region_buffer(struct intel_context *intel,
519 struct intel_region *region, GLuint flag)
522 if (flag == INTEL_WRITE_PART)
523 intel_region_cow(intel, region);
524 else if (flag == INTEL_WRITE_FULL)
525 intel_region_release_pbo(intel, region);
528 return region->buffer;