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 if (buffer
== NULL
) {
153 _DBG("%s <-- NULL\n", __FUNCTION__
);
157 region
= calloc(sizeof(*region
), 1);
162 region
->width
= width
;
163 region
->height
= height
;
164 region
->pitch
= pitch
;
165 region
->refcount
= 1;
166 region
->buffer
= buffer
;
167 region
->tiling
= tiling
;
168 region
->screen
= screen
;
170 _DBG("%s <-- %p\n", __FUNCTION__
, region
);
174 struct intel_region
*
175 intel_region_alloc(struct intel_screen
*screen
,
177 GLuint cpp
, GLuint width
, GLuint height
,
178 GLboolean expect_accelerated_upload
)
180 drm_intel_bo
*buffer
;
181 unsigned long flags
= 0;
182 unsigned long aligned_pitch
;
184 if (expect_accelerated_upload
)
185 flags
|= BO_ALLOC_FOR_RENDER
;
187 buffer
= drm_intel_bo_alloc_tiled(screen
->bufmgr
, "region",
189 &tiling
, &aligned_pitch
, flags
);
191 return intel_region_alloc_internal(screen
, cpp
, width
, height
,
192 aligned_pitch
/ cpp
, tiling
, buffer
);
196 intel_region_flink(struct intel_region
*region
, uint32_t *name
)
198 if (region
->name
== 0) {
199 if (drm_intel_bo_flink(region
->buffer
, ®ion
->name
))
202 _mesa_HashInsert(region
->screen
->named_regions
,
203 region
->name
, region
);
206 *name
= region
->name
;
211 struct intel_region
*
212 intel_region_alloc_for_handle(struct intel_screen
*screen
,
214 GLuint width
, GLuint height
, GLuint pitch
,
215 GLuint handle
, const char *name
)
217 struct intel_region
*region
, *dummy
;
218 drm_intel_bo
*buffer
;
220 uint32_t bit_6_swizzle
, tiling
;
222 region
= _mesa_HashLookup(screen
->named_regions
, handle
);
223 if (region
!= NULL
) {
225 if (region
->width
!= width
|| region
->height
!= height
||
226 region
->cpp
!= cpp
|| region
->pitch
!= pitch
) {
228 "Region for name %d already exists but is not compatible\n",
232 intel_region_reference(&dummy
, region
);
236 buffer
= intel_bo_gem_create_from_name(screen
->bufmgr
, name
, handle
);
239 ret
= drm_intel_bo_get_tiling(buffer
, &tiling
, &bit_6_swizzle
);
241 fprintf(stderr
, "Couldn't get tiling of buffer %d (%s): %s\n",
242 handle
, name
, strerror(-ret
));
243 drm_intel_bo_unreference(buffer
);
247 region
= intel_region_alloc_internal(screen
, cpp
,
248 width
, height
, pitch
, tiling
, buffer
);
249 if (region
== NULL
) {
250 drm_intel_bo_unreference(buffer
);
254 region
->name
= handle
;
255 _mesa_HashInsert(screen
->named_regions
, handle
, region
);
261 intel_region_reference(struct intel_region
**dst
, struct intel_region
*src
)
264 _DBG("%s %p %d\n", __FUNCTION__
, src
, src
->refcount
);
266 assert(*dst
== NULL
);
274 intel_region_release(struct intel_region
**region_handle
)
276 struct intel_region
*region
= *region_handle
;
278 if (region
== NULL
) {
279 _DBG("%s NULL\n", __FUNCTION__
);
283 _DBG("%s %p %d\n", __FUNCTION__
, region
, region
->refcount
- 1);
285 ASSERT(region
->refcount
> 0);
288 if (region
->refcount
== 0) {
289 assert(region
->map_refcount
== 0);
292 region
->pbo
->region
= NULL
;
294 drm_intel_bo_unreference(region
->buffer
);
296 if (region
->name
> 0)
297 _mesa_HashRemove(region
->screen
->named_regions
, region
->name
);
301 *region_handle
= NULL
;
305 * XXX Move this into core Mesa?
308 _mesa_copy_rect(GLubyte
* dst
,
316 GLuint src_pitch
, GLuint src_x
, GLuint src_y
)
324 dst
+= dst_y
* dst_pitch
;
325 src
+= src_y
* src_pitch
;
328 if (width
== dst_pitch
&& width
== src_pitch
)
329 memcpy(dst
, src
, height
* width
);
331 for (i
= 0; i
< height
; i
++) {
332 memcpy(dst
, src
, width
);
340 /* Upload data to a rectangular sub-region. Lots of choices how to do this:
342 * - memcpy by span to current destination
343 * - upload data as new buffer and blit
345 * Currently always memcpy.
348 intel_region_data(struct intel_context
*intel
,
349 struct intel_region
*dst
,
351 GLuint dstx
, GLuint dsty
,
352 const void *src
, GLuint src_pitch
,
353 GLuint srcx
, GLuint srcy
, GLuint width
, GLuint height
)
355 _DBG("%s\n", __FUNCTION__
);
362 dsty
== 0 && width
== dst
->pitch
&& height
== dst
->height
)
363 intel_region_release_pbo(intel
, dst
);
365 intel_region_cow(intel
, dst
);
368 intel_prepare_render(intel
);
370 _mesa_copy_rect(intel_region_map(intel
, dst
) + dst_offset
,
373 dstx
, dsty
, width
, height
, src
, src_pitch
, srcx
, srcy
);
375 intel_region_unmap(intel
, dst
);
378 /* Copy rectangular sub-regions. Need better logic about when to
379 * push buffers into AGP - will currently do so whenever possible.
382 intel_region_copy(struct intel_context
*intel
,
383 struct intel_region
*dst
,
385 GLuint dstx
, GLuint dsty
,
386 struct intel_region
*src
,
388 GLuint srcx
, GLuint srcy
, GLuint width
, GLuint height
,
392 uint32_t src_pitch
= src
->pitch
;
394 _DBG("%s\n", __FUNCTION__
);
401 dsty
== 0 && width
== dst
->pitch
&& height
== dst
->height
)
402 intel_region_release_pbo(intel
, dst
);
404 intel_region_cow(intel
, dst
);
407 assert(src
->cpp
== dst
->cpp
);
410 src_pitch
= -src_pitch
;
412 return intelEmitCopyBlit(intel
,
414 src_pitch
, src
->buffer
, src_offset
, src
->tiling
,
415 dst
->pitch
, dst
->buffer
, dst_offset
, dst
->tiling
,
416 srcx
, srcy
, dstx
, dsty
, width
, height
,
420 /* Attach to a pbo, discarding our data. Effectively zero-copy upload
424 intel_region_attach_pbo(struct intel_context
*intel
,
425 struct intel_region
*region
,
426 struct intel_buffer_object
*pbo
)
428 drm_intel_bo
*buffer
;
430 if (region
->pbo
== pbo
)
433 _DBG("%s %p %p\n", __FUNCTION__
, region
, pbo
);
435 /* If there is already a pbo attached, break the cow tie now.
436 * Don't call intel_region_release_pbo() as that would
437 * unnecessarily allocate a new buffer we would have to immediately
441 region
->pbo
->region
= NULL
;
445 if (region
->buffer
) {
446 drm_intel_bo_unreference(region
->buffer
);
447 region
->buffer
= NULL
;
450 /* make sure pbo has a buffer of its own */
451 buffer
= intel_bufferobj_buffer(intel
, pbo
, INTEL_WRITE_FULL
);
454 region
->pbo
->region
= region
;
455 drm_intel_bo_reference(buffer
);
456 region
->buffer
= buffer
;
457 region
->tiling
= I915_TILING_NONE
;
461 /* Break the COW tie to the pbo and allocate a new buffer.
462 * The pbo gets to keep the data.
465 intel_region_release_pbo(struct intel_context
*intel
,
466 struct intel_region
*region
)
468 _DBG("%s %p\n", __FUNCTION__
, region
);
469 assert(region
->buffer
== region
->pbo
->buffer
);
470 region
->pbo
->region
= NULL
;
472 drm_intel_bo_unreference(region
->buffer
);
473 region
->buffer
= NULL
;
475 region
->buffer
= drm_intel_bo_alloc(intel
->bufmgr
, "region",
476 region
->pitch
* region
->cpp
*
481 /* Break the COW tie to the pbo. Both the pbo and the region end up
482 * with a copy of the data.
485 intel_region_cow(struct intel_context
*intel
, struct intel_region
*region
)
487 struct intel_buffer_object
*pbo
= region
->pbo
;
490 intel_region_release_pbo(intel
, region
);
492 assert(region
->cpp
* region
->pitch
* region
->height
== pbo
->Base
.Size
);
494 _DBG("%s %p (%d bytes)\n", __FUNCTION__
, region
, pbo
->Base
.Size
);
496 /* Now blit from the texture buffer to the new buffer:
499 intel_prepare_render(intel
);
500 ok
= intelEmitCopyBlit(intel
,
502 region
->pitch
, pbo
->buffer
, 0, region
->tiling
,
503 region
->pitch
, region
->buffer
, 0, region
->tiling
,
505 region
->pitch
, region
->height
,
511 intel_region_buffer(struct intel_context
*intel
,
512 struct intel_region
*region
, GLuint flag
)
515 if (flag
== INTEL_WRITE_PART
)
516 intel_region_cow(intel
, region
);
517 else if (flag
== INTEL_WRITE_FULL
)
518 intel_region_release_pbo(intel
, region
);
521 return region
->buffer
;