1 /**************************************************************************
3 * Copyright © 2007 Red Hat Inc.
4 * Copyright © 2007 Intel Corporation
5 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * The above copyright notice and this permission notice (including the
25 * next paragraph) shall be included in all copies or substantial portions
29 **************************************************************************/
31 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
32 * Keith Whitwell <keithw-at-tungstengraphics-dot-com>
33 * Eric Anholt <eric@anholt.net>
34 * Dave Airlie <airlied@linux.ie>
43 #include <sys/ioctl.h>
47 #include "dri_bufmgr.h"
48 #include "intel_bufmgr.h"
53 #define DBG(...) do { \
54 if (bufmgr_gem->bufmgr.debug) \
55 fprintf(stderr, __VA_ARGS__); \
58 typedef struct _dri_bo_gem dri_bo_gem;
60 struct dri_gem_bo_bucket_entry {
62 struct dri_gem_bo_bucket_entry *next;
65 struct dri_gem_bo_bucket {
66 struct dri_gem_bo_bucket_entry *head;
67 struct dri_gem_bo_bucket_entry **tail;
69 * Limit on the number of entries in this bucket.
71 * 0 means that this caching at this bucket size is disabled.
72 * -1 means that there is no limit to caching at this size.
78 /* Arbitrarily chosen, 16 means that the maximum size we'll cache for reuse
79 * is 1 << 16 pages, or 256MB.
81 #define INTEL_GEM_BO_BUCKETS 16
82 typedef struct _dri_bufmgr_gem {
85 struct intel_bufmgr intel_bufmgr;
91 struct drm_i915_gem_exec_object *exec_objects;
96 /** Array of lists of cached gem objects of power-of-two sizes */
97 struct dri_gem_bo_bucket cache_bucket[INTEL_GEM_BO_BUCKETS];
99 struct drm_i915_gem_execbuffer exec_arg;
106 /** Boolean whether the mmap ioctl has been called for this buffer yet. */
112 * Index of the buffer within the validation list while preparing a
113 * batchbuffer execution.
118 * Boolean whether set_domain to CPU is current
119 * Set when set_domain has been called
120 * Cleared when a batch has been submitted
124 /** Array passed to the DRM containing relocation information. */
125 struct drm_i915_gem_relocation_entry *relocs;
126 /** Array of bos corresponding to relocs[i].target_handle */
127 dri_bo **reloc_target_bo;
128 /** Number of entries in relocs */
130 /** Mapped address for the buffer */
148 static struct dri_gem_bo_bucket *
149 dri_gem_bo_bucket_for_size(dri_bufmgr_gem *bufmgr_gem, unsigned long size)
153 /* We only do buckets in power of two increments */
154 if ((size & (size - 1)) != 0)
157 /* We should only see sizes rounded to pages. */
158 assert((size % 4096) == 0);
160 /* We always allocate in units of pages */
161 i = ffs(size / 4096) - 1;
162 if (i >= INTEL_GEM_BO_BUCKETS)
165 return &bufmgr_gem->cache_bucket[i];
169 static void dri_gem_dump_validation_list(dri_bufmgr_gem *bufmgr_gem)
173 for (i = 0; i < bufmgr_gem->exec_count; i++) {
174 dri_bo *bo = bufmgr_gem->exec_bos[i];
175 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
177 if (bo_gem->relocs == NULL) {
178 DBG("%2d: %d (%s)\n", i, bo_gem->gem_handle, bo_gem->name);
182 for (j = 0; j < bo_gem->reloc_count; j++) {
183 dri_bo *target_bo = bo_gem->reloc_target_bo[j];
184 dri_bo_gem *target_gem = (dri_bo_gem *)target_bo;
186 DBG("%2d: %d (%s)@0x%08llx -> %d (%s)@0x%08lx + 0x%08x\n",
188 bo_gem->gem_handle, bo_gem->name, bo_gem->relocs[j].offset,
189 target_gem->gem_handle, target_gem->name, target_bo->offset,
190 bo_gem->relocs[j].delta);
196 * Adds the given buffer to the list of buffers to be validated (moved into the
197 * appropriate memory type) with the next batch submission.
199 * If a buffer is validated multiple times in a batch submission, it ends up
200 * with the intersection of the memory type flags and the union of the
204 intel_add_validate_buffer(dri_bo *bo)
206 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
207 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
210 if (bo_gem->validate_index != -1)
213 /* Extend the array of validation entries as necessary. */
214 if (bufmgr_gem->exec_count == bufmgr_gem->exec_size) {
215 int new_size = bufmgr_gem->exec_size * 2;
220 bufmgr_gem->exec_objects =
221 realloc(bufmgr_gem->exec_objects,
222 sizeof(*bufmgr_gem->exec_objects) * new_size);
223 bufmgr_gem->exec_bos =
224 realloc(bufmgr_gem->exec_bos,
225 sizeof(*bufmgr_gem->exec_bos) * new_size);
226 bufmgr_gem->exec_size = new_size;
229 index = bufmgr_gem->exec_count;
230 bo_gem->validate_index = index;
231 /* Fill in array entry */
232 bufmgr_gem->exec_objects[index].handle = bo_gem->gem_handle;
233 bufmgr_gem->exec_objects[index].relocation_count = bo_gem->reloc_count;
234 bufmgr_gem->exec_objects[index].relocs_ptr = (uintptr_t)bo_gem->relocs;
235 bufmgr_gem->exec_objects[index].alignment = 0;
236 bufmgr_gem->exec_objects[index].offset = 0;
237 bufmgr_gem->exec_bos[index] = bo;
238 dri_bo_reference(bo);
239 bufmgr_gem->exec_count++;
243 #define RELOC_BUF_SIZE(x) ((I915_RELOC_HEADER + x * I915_RELOC0_STRIDE) * \
247 intel_setup_reloc_list(dri_bo *bo)
249 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
250 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
252 bo_gem->relocs = malloc(bufmgr_gem->max_relocs *
253 sizeof(struct drm_i915_gem_relocation_entry));
254 bo_gem->reloc_target_bo = malloc(bufmgr_gem->max_relocs * sizeof(dri_bo *));
260 dri_gem_bo_alloc(dri_bufmgr *bufmgr, const char *name,
261 unsigned long size, unsigned int alignment)
263 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
265 unsigned int page_size = getpagesize();
267 struct dri_gem_bo_bucket *bucket;
268 int alloc_from_cache = 0;
269 unsigned long bo_size;
271 /* Round the allocated size up to a power of two number of pages. */
272 bo_size = 1 << logbase2(size);
273 if (bo_size < page_size)
275 bucket = dri_gem_bo_bucket_for_size(bufmgr_gem, bo_size);
277 /* If we don't have caching at this size, don't actually round the
280 if (bucket == NULL || bucket->max_entries == 0) {
282 if (bo_size < page_size)
286 /* Get a buffer out of the cache if available */
287 if (bucket != NULL && bucket->num_entries > 0) {
288 struct dri_gem_bo_bucket_entry *entry = bucket->head;
289 struct drm_i915_gem_busy busy;
291 bo_gem = entry->bo_gem;
292 busy.handle = bo_gem->gem_handle;
294 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
295 alloc_from_cache = (ret == 0 && busy.busy == 0);
297 if (alloc_from_cache) {
298 bucket->head = entry->next;
299 if (entry->next == NULL)
300 bucket->tail = &bucket->head;
301 bucket->num_entries--;
307 if (!alloc_from_cache) {
308 struct drm_gem_create create;
310 bo_gem = calloc(1, sizeof(*bo_gem));
314 bo_gem->bo.size = bo_size;
315 memset(&create, 0, sizeof(create));
316 create.size = bo_size;
318 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CREATE, &create);
319 bo_gem->gem_handle = create.handle;
324 bo_gem->bo.bufmgr = bufmgr;
328 bo_gem->refcount = 1;
329 bo_gem->validate_index = -1;
331 DBG("bo_create: buf %d (%s) %ldb\n",
332 bo_gem->gem_handle, bo_gem->name, size);
338 * Returns a dri_bo wrapping the given buffer object handle.
340 * This can be used when one application needs to pass a buffer object
344 intel_bo_gem_create_from_name(dri_bufmgr *bufmgr, const char *name,
347 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
350 struct drm_gem_open open_arg;
352 bo_gem = calloc(1, sizeof(*bo_gem));
356 memset(&open_arg, 0, sizeof(open_arg));
357 open_arg.name = handle;
358 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
360 fprintf(stderr, "Couldn't reference %s handle 0x%08x: %s\n",
361 name, handle, strerror(-ret));
365 bo_gem->bo.size = open_arg.size;
366 bo_gem->bo.offset = 0;
367 bo_gem->bo.virtual = NULL;
368 bo_gem->bo.bufmgr = bufmgr;
370 bo_gem->refcount = 1;
371 bo_gem->validate_index = -1;
372 bo_gem->gem_handle = open_arg.handle;
374 DBG("bo_create_from_handle: %d (%s)\n", handle, bo_gem->name);
380 dri_gem_bo_reference(dri_bo *bo)
382 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
388 dri_gem_bo_unreference(dri_bo *bo)
390 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
391 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
396 if (--bo_gem->refcount == 0) {
397 struct dri_gem_bo_bucket *bucket;
400 if (bo_gem->relocs != NULL) {
403 /* Unreference all the target buffers */
404 for (i = 0; i < bo_gem->reloc_count; i++)
405 dri_bo_unreference(bo_gem->reloc_target_bo[i]);
406 free(bo_gem->reloc_target_bo);
407 free(bo_gem->relocs);
410 DBG("bo_unreference final: %d (%s)\n",
411 bo_gem->gem_handle, bo_gem->name);
413 bucket = dri_gem_bo_bucket_for_size(bufmgr_gem, bo->size);
414 /* Put the buffer into our internal cache for reuse if we can. */
415 if (bucket != NULL &&
416 (bucket->max_entries == -1 ||
417 (bucket->max_entries > 0 &&
418 bucket->num_entries < bucket->max_entries)))
420 struct dri_gem_bo_bucket_entry *entry;
423 bo_gem->validate_index = -1;
424 bo_gem->relocs = NULL;
425 bo_gem->reloc_target_bo = NULL;
426 bo_gem->reloc_count = 0;
428 entry = calloc(1, sizeof(*entry));
429 entry->bo_gem = bo_gem;
432 *bucket->tail = entry;
433 bucket->tail = &entry->next;
434 bucket->num_entries++;
436 struct drm_gem_close close;
438 /* Close this object */
439 close.handle = bo_gem->gem_handle;
440 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close);
443 "DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n",
444 bo_gem->gem_handle, bo_gem->name, strerror(-ret));
454 dri_gem_bo_map(dri_bo *bo, int write_enable)
456 dri_bufmgr_gem *bufmgr_gem;
457 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
458 struct drm_gem_set_domain set_domain;
461 bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
463 /* Allow recursive mapping. Mesa may recursively map buffers with
464 * nested display loops.
466 if (!bo_gem->mapped) {
468 assert(bo->virtual == NULL);
470 DBG("bo_map: %d (%s)\n", bo_gem->gem_handle, bo_gem->name);
472 if (bo_gem->virtual == NULL) {
473 struct drm_gem_mmap mmap_arg;
475 memset(&mmap_arg, 0, sizeof(mmap_arg));
476 mmap_arg.handle = bo_gem->gem_handle;
478 mmap_arg.size = bo->size;
479 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_MMAP, &mmap_arg);
481 fprintf(stderr, "%s:%d: Error mapping buffer %d (%s): %s .\n",
483 bo_gem->gem_handle, bo_gem->name, strerror(errno));
485 bo_gem->virtual = (void *)(uintptr_t)mmap_arg.addr_ptr;
487 bo->virtual = bo_gem->virtual;
489 DBG("bo_map: %d (%s) -> %p\n", bo_gem->gem_handle, bo_gem->name, bo_gem->virtual);
492 if (!bo_gem->cpu_domain_set) {
493 set_domain.handle = bo_gem->gem_handle;
494 set_domain.read_domains = DRM_GEM_DOMAIN_CPU;
495 set_domain.write_domain = write_enable ? DRM_GEM_DOMAIN_CPU : 0;
496 ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_GEM_SET_DOMAIN, &set_domain);
498 fprintf (stderr, "%s:%d: Error setting memory domains %d (%08x %08x): %s .\n",
500 bo_gem->gem_handle, set_domain.read_domains, set_domain.write_domain,
503 bo_gem->cpu_domain_set = 1;
510 dri_gem_bo_unmap(dri_bo *bo)
512 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
517 assert(bo_gem->mapped);
523 dri_gem_bo_subdata (dri_bo *bo, unsigned long offset,
524 unsigned long size, const void *data)
526 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
527 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
528 struct drm_gem_pwrite pwrite;
531 memset (&pwrite, 0, sizeof (pwrite));
532 pwrite.handle = bo_gem->gem_handle;
533 pwrite.offset = offset;
535 pwrite.data_ptr = (uint64_t) (uintptr_t) data;
536 ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_GEM_PWRITE, &pwrite);
538 fprintf (stderr, "%s:%d: Error writing data to buffer %d: (%d %d) %s .\n",
540 bo_gem->gem_handle, (int) offset, (int) size,
547 dri_gem_bo_get_subdata (dri_bo *bo, unsigned long offset,
548 unsigned long size, void *data)
550 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
551 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
552 struct drm_gem_pread pread;
555 memset (&pread, 0, sizeof (pread));
556 pread.handle = bo_gem->gem_handle;
557 pread.offset = offset;
559 pread.data_ptr = (uint64_t) (uintptr_t) data;
560 ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_GEM_PREAD, &pread);
562 fprintf (stderr, "%s:%d: Error reading data from buffer %d: (%d %d) %s .\n",
564 bo_gem->gem_handle, (int) offset, (int) size,
571 dri_gem_bo_wait_rendering(dri_bo *bo)
573 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
574 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
575 struct drm_gem_set_domain set_domain;
578 set_domain.handle = bo_gem->gem_handle;
579 set_domain.read_domains = DRM_GEM_DOMAIN_CPU;
580 set_domain.write_domain = 0;
581 ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_GEM_SET_DOMAIN, &set_domain);
583 fprintf (stderr, "%s:%d: Error setting memory domains %d (%08x %08x): %s .\n",
585 bo_gem->gem_handle, set_domain.read_domains, set_domain.write_domain,
591 dri_bufmgr_gem_destroy(dri_bufmgr *bufmgr)
593 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
596 free(bufmgr_gem->exec_objects);
597 free(bufmgr_gem->exec_bos);
599 /* Free any cached buffer objects we were going to reuse */
600 for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++) {
601 struct dri_gem_bo_bucket *bucket = &bufmgr_gem->cache_bucket[i];
602 struct dri_gem_bo_bucket_entry *entry;
604 while ((entry = bucket->head) != NULL) {
605 struct drm_gem_close close;
609 bucket->head = entry->next;
610 if (entry->next == NULL)
611 bucket->tail = &bucket->head;
612 bucket->num_entries--;
614 bo_gem = entry->bo_gem;
616 munmap (bo_gem->virtual, bo_gem->bo.size);
618 /* Close this object */
619 close.handle = bo_gem->gem_handle;
620 ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close);
622 fprintf(stderr, "DRM_IOCTL_GEM_CLOSE failed: %s\n",
635 * Adds the target buffer to the validation list and adds the relocation
636 * to the reloc_buffer's relocation list.
638 * The relocation entry at the given offset must already contain the
639 * precomputed relocation value, because the kernel will optimize out
640 * the relocation entry write when the buffer hasn't moved from the
641 * last known offset in target_bo.
644 dri_gem_emit_reloc(dri_bo *bo, uint32_t read_domains, uint32_t write_domain,
645 uint32_t delta, uint32_t offset, dri_bo *target_bo)
647 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
648 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
649 dri_bo_gem *target_bo_gem = (dri_bo_gem *)target_bo;
651 /* Create a new relocation list if needed */
652 if (bo_gem->relocs == NULL)
653 intel_setup_reloc_list(bo);
656 assert(bo_gem->reloc_count < bufmgr_gem->max_relocs);
659 assert (offset <= bo->size - 4);
660 assert ((write_domain & (write_domain-1)) == 0);
662 bo_gem->relocs[bo_gem->reloc_count].offset = offset;
663 bo_gem->relocs[bo_gem->reloc_count].delta = delta;
664 bo_gem->relocs[bo_gem->reloc_count].target_handle =
665 target_bo_gem->gem_handle;
666 bo_gem->relocs[bo_gem->reloc_count].read_domains = read_domains;
667 bo_gem->relocs[bo_gem->reloc_count].write_domain = write_domain;
668 bo_gem->relocs[bo_gem->reloc_count].presumed_offset = target_bo->offset;
670 bo_gem->reloc_target_bo[bo_gem->reloc_count] = target_bo;
671 dri_bo_reference(target_bo);
673 bo_gem->reloc_count++;
678 * Walk the tree of relocations rooted at BO and accumulate the list of
679 * validations to be performed and update the relocation buffers with
680 * index values into the validation list.
683 dri_gem_bo_process_reloc(dri_bo *bo)
685 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
688 if (bo_gem->relocs == NULL)
691 for (i = 0; i < bo_gem->reloc_count; i++) {
692 dri_bo *target_bo = bo_gem->reloc_target_bo[i];
694 /* Continue walking the tree depth-first. */
695 dri_gem_bo_process_reloc(target_bo);
697 /* Add the target to the validate list */
698 intel_add_validate_buffer(target_bo);
703 dri_gem_process_reloc(dri_bo *batch_buf)
705 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *) batch_buf->bufmgr;
707 /* Update indices and set up the validate list. */
708 dri_gem_bo_process_reloc(batch_buf);
710 /* Add the batch buffer to the validation list. There are no relocations
713 intel_add_validate_buffer(batch_buf);
715 bufmgr_gem->exec_arg.buffers_ptr = (uintptr_t)bufmgr_gem->exec_objects;
716 bufmgr_gem->exec_arg.buffer_count = bufmgr_gem->exec_count;
717 bufmgr_gem->exec_arg.batch_start_offset = 0;
718 bufmgr_gem->exec_arg.batch_len = 0; /* written in intel_exec_ioctl */
720 return &bufmgr_gem->exec_arg;
724 intel_update_buffer_offsets (dri_bufmgr_gem *bufmgr_gem)
728 for (i = 0; i < bufmgr_gem->exec_count; i++) {
729 dri_bo *bo = bufmgr_gem->exec_bos[i];
730 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
732 /* Update the buffer offset */
733 if (bufmgr_gem->exec_objects[i].offset != bo->offset) {
734 DBG("BO %d (%s) migrated: 0x%08lx -> 0x%08llx\n",
735 bo_gem->gem_handle, bo_gem->name, bo->offset,
736 bufmgr_gem->exec_objects[i].offset);
737 bo->offset = bufmgr_gem->exec_objects[i].offset;
743 dri_gem_post_submit(dri_bo *batch_buf)
745 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)batch_buf->bufmgr;
748 intel_update_buffer_offsets (bufmgr_gem);
750 if (bufmgr_gem->bufmgr.debug)
751 dri_gem_dump_validation_list(bufmgr_gem);
753 for (i = 0; i < bufmgr_gem->exec_count; i++) {
754 dri_bo *bo = bufmgr_gem->exec_bos[i];
755 dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
757 /* Need to call set_domain on next bo_map */
758 bo_gem->cpu_domain_set = 0;
760 /* Disconnect the buffer from the validate list */
761 bo_gem->validate_index = -1;
762 dri_bo_unreference(bo);
763 bufmgr_gem->exec_bos[i] = NULL;
765 bufmgr_gem->exec_count = 0;
769 * Enables unlimited caching of buffer objects for reuse.
771 * This is potentially very memory expensive, as the cache at each bucket
772 * size is only bounded by how many buffers of that size we've managed to have
776 intel_bufmgr_gem_enable_reuse(dri_bufmgr *bufmgr)
778 dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
781 for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++) {
782 bufmgr_gem->cache_bucket[i].max_entries = -1;
790 dri_gem_check_aperture_space(dri_bo *bo)
796 * Initializes the GEM buffer manager, which uses the kernel to allocate, map,
797 * and manage map buffer objections.
799 * \param fd File descriptor of the opened DRM device.
802 intel_bufmgr_gem_init(int fd, int batch_size)
804 dri_bufmgr_gem *bufmgr_gem;
807 bufmgr_gem = calloc(1, sizeof(*bufmgr_gem));
810 /* Let's go with one relocation per every 2 dwords (but round down a bit
811 * since a power of two will mean an extra page allocation for the reloc
814 * Every 4 was too few for the blender benchmark.
816 bufmgr_gem->max_relocs = batch_size / sizeof(uint32_t) / 2 - 2;
818 bufmgr_gem->bufmgr.bo_alloc = dri_gem_bo_alloc;
819 bufmgr_gem->bufmgr.bo_reference = dri_gem_bo_reference;
820 bufmgr_gem->bufmgr.bo_unreference = dri_gem_bo_unreference;
821 bufmgr_gem->bufmgr.bo_map = dri_gem_bo_map;
822 bufmgr_gem->bufmgr.bo_unmap = dri_gem_bo_unmap;
823 bufmgr_gem->bufmgr.bo_subdata = dri_gem_bo_subdata;
824 bufmgr_gem->bufmgr.bo_get_subdata = dri_gem_bo_get_subdata;
825 bufmgr_gem->bufmgr.bo_wait_rendering = dri_gem_bo_wait_rendering;
826 bufmgr_gem->bufmgr.destroy = dri_bufmgr_gem_destroy;
827 bufmgr_gem->bufmgr.process_relocs = dri_gem_process_reloc;
828 bufmgr_gem->bufmgr.post_submit = dri_gem_post_submit;
829 bufmgr_gem->bufmgr.debug = 0;
830 bufmgr_gem->bufmgr.check_aperture_space = dri_gem_check_aperture_space;
831 bufmgr_gem->intel_bufmgr.emit_reloc = dri_gem_emit_reloc;
832 /* Initialize the linked lists for BO reuse cache. */
833 for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++)
834 bufmgr_gem->cache_bucket[i].tail = &bufmgr_gem->cache_bucket[i].head;
836 return &bufmgr_gem->bufmgr;
840 intel_bo_emit_reloc(dri_bo *reloc_buf,
841 uint32_t read_domains, uint32_t write_domain,
842 uint32_t delta, uint32_t offset, dri_bo *target_buf)
844 struct intel_bufmgr *intel_bufmgr;
846 intel_bufmgr = (struct intel_bufmgr *)(reloc_buf->bufmgr + 1);
848 return intel_bufmgr->emit_reloc(reloc_buf, read_domains, write_domain,
849 delta, offset, target_buf);