1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright © 2015 Broadcom
7 * DOC: VC4 GEM BO management support
9 * The VC4 GPU architecture (both scanout and rendering) has direct
10 * access to system memory with no MMU in between. To support it, we
11 * use the GEM CMA helper functions to allocate contiguous ranges of
12 * physical memory for our BOs.
14 * Since the CMA allocator is very slow, we keep a cache of recently
15 * freed BOs around so that the kernel's allocation of objects for 3D
16 * rendering can return quickly.
19 #include <linux/dma-buf.h>
22 #include "uapi/drm/vc4_drm.h"
24 static const char * const bo_type_names[] = {
35 static bool is_user_label(int label)
37 return label >= VC4_BO_TYPE_COUNT;
40 static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4)
44 for (i = 0; i < vc4->num_labels; i++) {
45 if (!vc4->bo_labels[i].num_allocated)
48 drm_printf(p, "%30s: %6dkb BOs (%d)\n",
49 vc4->bo_labels[i].name,
50 vc4->bo_labels[i].size_allocated / 1024,
51 vc4->bo_labels[i].num_allocated);
54 mutex_lock(&vc4->purgeable.lock);
55 if (vc4->purgeable.num)
56 drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "userspace BO cache",
57 vc4->purgeable.size / 1024, vc4->purgeable.num);
59 if (vc4->purgeable.purged_num)
60 drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "total purged BO",
61 vc4->purgeable.purged_size / 1024,
62 vc4->purgeable.purged_num);
63 mutex_unlock(&vc4->purgeable.lock);
66 static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
68 struct drm_info_node *node = (struct drm_info_node *)m->private;
69 struct drm_device *dev = node->minor->dev;
70 struct vc4_dev *vc4 = to_vc4_dev(dev);
71 struct drm_printer p = drm_seq_file_printer(m);
73 vc4_bo_stats_print(&p, vc4);
78 /* Takes ownership of *name and returns the appropriate slot for it in
79 * the bo_labels[] array, extending it as necessary.
81 * This is inefficient and could use a hash table instead of walking
82 * an array and strcmp()ing. However, the assumption is that user
83 * labeling will be infrequent (scanout buffers and other long-lived
84 * objects, or debug driver builds), so we can live with it for now.
86 static int vc4_get_user_label(struct vc4_dev *vc4, const char *name)
91 for (i = 0; i < vc4->num_labels; i++) {
92 if (!vc4->bo_labels[i].name) {
94 } else if (strcmp(vc4->bo_labels[i].name, name) == 0) {
100 if (free_slot != -1) {
101 WARN_ON(vc4->bo_labels[free_slot].num_allocated != 0);
102 vc4->bo_labels[free_slot].name = name;
105 u32 new_label_count = vc4->num_labels + 1;
106 struct vc4_label *new_labels =
107 krealloc(vc4->bo_labels,
108 new_label_count * sizeof(*new_labels),
116 free_slot = vc4->num_labels;
117 vc4->bo_labels = new_labels;
118 vc4->num_labels = new_label_count;
120 vc4->bo_labels[free_slot].name = name;
121 vc4->bo_labels[free_slot].num_allocated = 0;
122 vc4->bo_labels[free_slot].size_allocated = 0;
128 static void vc4_bo_set_label(struct drm_gem_object *gem_obj, int label)
130 struct vc4_bo *bo = to_vc4_bo(gem_obj);
131 struct vc4_dev *vc4 = to_vc4_dev(gem_obj->dev);
133 lockdep_assert_held(&vc4->bo_lock);
136 vc4->bo_labels[label].num_allocated++;
137 vc4->bo_labels[label].size_allocated += gem_obj->size;
140 vc4->bo_labels[bo->label].num_allocated--;
141 vc4->bo_labels[bo->label].size_allocated -= gem_obj->size;
143 if (vc4->bo_labels[bo->label].num_allocated == 0 &&
144 is_user_label(bo->label)) {
145 /* Free user BO label slots on last unreference.
146 * Slots are just where we track the stats for a given
147 * name, and once a name is unused we can reuse that
150 kfree(vc4->bo_labels[bo->label].name);
151 vc4->bo_labels[bo->label].name = NULL;
157 static uint32_t bo_page_index(size_t size)
159 return (size / PAGE_SIZE) - 1;
162 static void vc4_bo_destroy(struct vc4_bo *bo)
164 struct drm_gem_object *obj = &bo->base.base;
165 struct vc4_dev *vc4 = to_vc4_dev(obj->dev);
167 lockdep_assert_held(&vc4->bo_lock);
169 vc4_bo_set_label(obj, -1);
171 if (bo->validated_shader) {
172 kfree(bo->validated_shader->uniform_addr_offsets);
173 kfree(bo->validated_shader->texture_samples);
174 kfree(bo->validated_shader);
175 bo->validated_shader = NULL;
178 drm_gem_cma_free_object(obj);
181 static void vc4_bo_remove_from_cache(struct vc4_bo *bo)
183 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
185 lockdep_assert_held(&vc4->bo_lock);
186 list_del(&bo->unref_head);
187 list_del(&bo->size_head);
190 static struct list_head *vc4_get_cache_list_for_size(struct drm_device *dev,
193 struct vc4_dev *vc4 = to_vc4_dev(dev);
194 uint32_t page_index = bo_page_index(size);
196 if (vc4->bo_cache.size_list_size <= page_index) {
197 uint32_t new_size = max(vc4->bo_cache.size_list_size * 2,
199 struct list_head *new_list;
202 new_list = kmalloc_array(new_size, sizeof(struct list_head),
207 /* Rebase the old cached BO lists to their new list
210 for (i = 0; i < vc4->bo_cache.size_list_size; i++) {
211 struct list_head *old_list =
212 &vc4->bo_cache.size_list[i];
214 if (list_empty(old_list))
215 INIT_LIST_HEAD(&new_list[i]);
217 list_replace(old_list, &new_list[i]);
219 /* And initialize the brand new BO list heads. */
220 for (i = vc4->bo_cache.size_list_size; i < new_size; i++)
221 INIT_LIST_HEAD(&new_list[i]);
223 kfree(vc4->bo_cache.size_list);
224 vc4->bo_cache.size_list = new_list;
225 vc4->bo_cache.size_list_size = new_size;
228 return &vc4->bo_cache.size_list[page_index];
231 static void vc4_bo_cache_purge(struct drm_device *dev)
233 struct vc4_dev *vc4 = to_vc4_dev(dev);
235 mutex_lock(&vc4->bo_lock);
236 while (!list_empty(&vc4->bo_cache.time_list)) {
237 struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
238 struct vc4_bo, unref_head);
239 vc4_bo_remove_from_cache(bo);
242 mutex_unlock(&vc4->bo_lock);
245 void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo)
247 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
249 mutex_lock(&vc4->purgeable.lock);
250 list_add_tail(&bo->size_head, &vc4->purgeable.list);
251 vc4->purgeable.num++;
252 vc4->purgeable.size += bo->base.base.size;
253 mutex_unlock(&vc4->purgeable.lock);
256 static void vc4_bo_remove_from_purgeable_pool_locked(struct vc4_bo *bo)
258 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
260 /* list_del_init() is used here because the caller might release
261 * the purgeable lock in order to acquire the madv one and update the
263 * During this short period of time a user might decide to mark
264 * the BO as unpurgeable, and if bo->madv is set to
265 * VC4_MADV_DONTNEED it will try to remove the BO from the
266 * purgeable list which will fail if the ->next/prev fields
267 * are set to LIST_POISON1/LIST_POISON2 (which is what
269 * Re-initializing the list element guarantees that list_del()
270 * will work correctly even if it's a NOP.
272 list_del_init(&bo->size_head);
273 vc4->purgeable.num--;
274 vc4->purgeable.size -= bo->base.base.size;
277 void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo)
279 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
281 mutex_lock(&vc4->purgeable.lock);
282 vc4_bo_remove_from_purgeable_pool_locked(bo);
283 mutex_unlock(&vc4->purgeable.lock);
286 static void vc4_bo_purge(struct drm_gem_object *obj)
288 struct vc4_bo *bo = to_vc4_bo(obj);
289 struct drm_device *dev = obj->dev;
291 WARN_ON(!mutex_is_locked(&bo->madv_lock));
292 WARN_ON(bo->madv != VC4_MADV_DONTNEED);
294 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
296 dma_free_wc(dev->dev, obj->size, bo->base.vaddr, bo->base.paddr);
297 bo->base.vaddr = NULL;
298 bo->madv = __VC4_MADV_PURGED;
301 static void vc4_bo_userspace_cache_purge(struct drm_device *dev)
303 struct vc4_dev *vc4 = to_vc4_dev(dev);
305 mutex_lock(&vc4->purgeable.lock);
306 while (!list_empty(&vc4->purgeable.list)) {
307 struct vc4_bo *bo = list_first_entry(&vc4->purgeable.list,
308 struct vc4_bo, size_head);
309 struct drm_gem_object *obj = &bo->base.base;
310 size_t purged_size = 0;
312 vc4_bo_remove_from_purgeable_pool_locked(bo);
314 /* Release the purgeable lock while we're purging the BO so
315 * that other people can continue inserting things in the
316 * purgeable pool without having to wait for all BOs to be
319 mutex_unlock(&vc4->purgeable.lock);
320 mutex_lock(&bo->madv_lock);
322 /* Since we released the purgeable pool lock before acquiring
323 * the BO madv one, the user may have marked the BO as WILLNEED
324 * and re-used it in the meantime.
325 * Before purging the BO we need to make sure
326 * - it is still marked as DONTNEED
327 * - it has not been re-inserted in the purgeable list
328 * - it is not used by HW blocks
329 * If one of these conditions is not met, just skip the entry.
331 if (bo->madv == VC4_MADV_DONTNEED &&
332 list_empty(&bo->size_head) &&
333 !refcount_read(&bo->usecnt)) {
334 purged_size = bo->base.base.size;
337 mutex_unlock(&bo->madv_lock);
338 mutex_lock(&vc4->purgeable.lock);
341 vc4->purgeable.purged_size += purged_size;
342 vc4->purgeable.purged_num++;
345 mutex_unlock(&vc4->purgeable.lock);
348 static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev,
350 enum vc4_kernel_bo_type type)
352 struct vc4_dev *vc4 = to_vc4_dev(dev);
353 uint32_t page_index = bo_page_index(size);
354 struct vc4_bo *bo = NULL;
356 size = roundup(size, PAGE_SIZE);
358 mutex_lock(&vc4->bo_lock);
359 if (page_index >= vc4->bo_cache.size_list_size)
362 if (list_empty(&vc4->bo_cache.size_list[page_index]))
365 bo = list_first_entry(&vc4->bo_cache.size_list[page_index],
366 struct vc4_bo, size_head);
367 vc4_bo_remove_from_cache(bo);
368 kref_init(&bo->base.base.refcount);
372 vc4_bo_set_label(&bo->base.base, type);
373 mutex_unlock(&vc4->bo_lock);
378 * vc4_gem_create_object - Implementation of driver->gem_create_object.
380 * @size: Size in bytes of the memory the object will reference
382 * This lets the CMA helpers allocate object structs for us, and keep
383 * our BO stats correct.
385 struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size)
387 struct vc4_dev *vc4 = to_vc4_dev(dev);
390 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
392 return ERR_PTR(-ENOMEM);
394 bo->madv = VC4_MADV_WILLNEED;
395 refcount_set(&bo->usecnt, 0);
396 mutex_init(&bo->madv_lock);
397 mutex_lock(&vc4->bo_lock);
398 bo->label = VC4_BO_TYPE_KERNEL;
399 vc4->bo_labels[VC4_BO_TYPE_KERNEL].num_allocated++;
400 vc4->bo_labels[VC4_BO_TYPE_KERNEL].size_allocated += size;
401 mutex_unlock(&vc4->bo_lock);
403 return &bo->base.base;
406 struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
407 bool allow_unzeroed, enum vc4_kernel_bo_type type)
409 size_t size = roundup(unaligned_size, PAGE_SIZE);
410 struct vc4_dev *vc4 = to_vc4_dev(dev);
411 struct drm_gem_cma_object *cma_obj;
415 return ERR_PTR(-EINVAL);
417 /* First, try to get a vc4_bo from the kernel BO cache. */
418 bo = vc4_bo_get_from_cache(dev, size, type);
421 memset(bo->base.vaddr, 0, bo->base.base.size);
425 cma_obj = drm_gem_cma_create(dev, size);
426 if (IS_ERR(cma_obj)) {
428 * If we've run out of CMA memory, kill the cache of
429 * CMA allocations we've got laying around and try again.
431 vc4_bo_cache_purge(dev);
432 cma_obj = drm_gem_cma_create(dev, size);
435 if (IS_ERR(cma_obj)) {
437 * Still not enough CMA memory, purge the userspace BO
439 * This is sub-optimal since we purge the whole userspace
440 * BO cache which forces user that want to re-use the BO to
441 * restore its initial content.
442 * Ideally, we should purge entries one by one and retry
443 * after each to see if CMA allocation succeeds. Or even
444 * better, try to find an entry with at least the same
447 vc4_bo_userspace_cache_purge(dev);
448 cma_obj = drm_gem_cma_create(dev, size);
451 if (IS_ERR(cma_obj)) {
452 struct drm_printer p = drm_info_printer(vc4->dev->dev);
453 DRM_ERROR("Failed to allocate from CMA:\n");
454 vc4_bo_stats_print(&p, vc4);
455 return ERR_PTR(-ENOMEM);
457 bo = to_vc4_bo(&cma_obj->base);
459 /* By default, BOs do not support the MADV ioctl. This will be enabled
460 * only on BOs that are exposed to userspace (V3D, V3D_SHADER and DUMB
463 bo->madv = __VC4_MADV_NOTSUPP;
465 mutex_lock(&vc4->bo_lock);
466 vc4_bo_set_label(&cma_obj->base, type);
467 mutex_unlock(&vc4->bo_lock);
472 int vc4_dumb_create(struct drm_file *file_priv,
473 struct drm_device *dev,
474 struct drm_mode_create_dumb *args)
476 int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
477 struct vc4_bo *bo = NULL;
480 if (args->pitch < min_pitch)
481 args->pitch = min_pitch;
483 if (args->size < args->pitch * args->height)
484 args->size = args->pitch * args->height;
486 bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_DUMB);
490 bo->madv = VC4_MADV_WILLNEED;
492 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
493 drm_gem_object_put_unlocked(&bo->base.base);
498 static void vc4_bo_cache_free_old(struct drm_device *dev)
500 struct vc4_dev *vc4 = to_vc4_dev(dev);
501 unsigned long expire_time = jiffies - msecs_to_jiffies(1000);
503 lockdep_assert_held(&vc4->bo_lock);
505 while (!list_empty(&vc4->bo_cache.time_list)) {
506 struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
507 struct vc4_bo, unref_head);
508 if (time_before(expire_time, bo->free_time)) {
509 mod_timer(&vc4->bo_cache.time_timer,
510 round_jiffies_up(jiffies +
511 msecs_to_jiffies(1000)));
515 vc4_bo_remove_from_cache(bo);
520 /* Called on the last userspace/kernel unreference of the BO. Returns
521 * it to the BO cache if possible, otherwise frees it.
523 void vc4_free_object(struct drm_gem_object *gem_bo)
525 struct drm_device *dev = gem_bo->dev;
526 struct vc4_dev *vc4 = to_vc4_dev(dev);
527 struct vc4_bo *bo = to_vc4_bo(gem_bo);
528 struct list_head *cache_list;
530 /* Remove the BO from the purgeable list. */
531 mutex_lock(&bo->madv_lock);
532 if (bo->madv == VC4_MADV_DONTNEED && !refcount_read(&bo->usecnt))
533 vc4_bo_remove_from_purgeable_pool(bo);
534 mutex_unlock(&bo->madv_lock);
536 mutex_lock(&vc4->bo_lock);
537 /* If the object references someone else's memory, we can't cache it.
539 if (gem_bo->import_attach) {
544 /* Don't cache if it was publicly named. */
550 /* If this object was partially constructed but CMA allocation
551 * had failed, just free it. Can also happen when the BO has been
554 if (!bo->base.vaddr) {
559 cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
565 if (bo->validated_shader) {
566 kfree(bo->validated_shader->uniform_addr_offsets);
567 kfree(bo->validated_shader->texture_samples);
568 kfree(bo->validated_shader);
569 bo->validated_shader = NULL;
572 /* Reset madv and usecnt before adding the BO to the cache. */
573 bo->madv = __VC4_MADV_NOTSUPP;
574 refcount_set(&bo->usecnt, 0);
576 bo->t_format = false;
577 bo->free_time = jiffies;
578 list_add(&bo->size_head, cache_list);
579 list_add(&bo->unref_head, &vc4->bo_cache.time_list);
581 vc4_bo_set_label(&bo->base.base, VC4_BO_TYPE_KERNEL_CACHE);
583 vc4_bo_cache_free_old(dev);
586 mutex_unlock(&vc4->bo_lock);
589 static void vc4_bo_cache_time_work(struct work_struct *work)
591 struct vc4_dev *vc4 =
592 container_of(work, struct vc4_dev, bo_cache.time_work);
593 struct drm_device *dev = vc4->dev;
595 mutex_lock(&vc4->bo_lock);
596 vc4_bo_cache_free_old(dev);
597 mutex_unlock(&vc4->bo_lock);
600 int vc4_bo_inc_usecnt(struct vc4_bo *bo)
604 /* Fast path: if the BO is already retained by someone, no need to
605 * check the madv status.
607 if (refcount_inc_not_zero(&bo->usecnt))
610 mutex_lock(&bo->madv_lock);
612 case VC4_MADV_WILLNEED:
613 if (!refcount_inc_not_zero(&bo->usecnt))
614 refcount_set(&bo->usecnt, 1);
617 case VC4_MADV_DONTNEED:
618 /* We shouldn't use a BO marked as purgeable if at least
619 * someone else retained its content by incrementing usecnt.
620 * Luckily the BO hasn't been purged yet, but something wrong
621 * is happening here. Just throw an error instead of
622 * authorizing this use case.
624 case __VC4_MADV_PURGED:
625 /* We can't use a purged BO. */
627 /* Invalid madv value. */
631 mutex_unlock(&bo->madv_lock);
636 void vc4_bo_dec_usecnt(struct vc4_bo *bo)
638 /* Fast path: if the BO is still retained by someone, no need to test
641 if (refcount_dec_not_one(&bo->usecnt))
644 mutex_lock(&bo->madv_lock);
645 if (refcount_dec_and_test(&bo->usecnt) &&
646 bo->madv == VC4_MADV_DONTNEED)
647 vc4_bo_add_to_purgeable_pool(bo);
648 mutex_unlock(&bo->madv_lock);
651 static void vc4_bo_cache_time_timer(struct timer_list *t)
653 struct vc4_dev *vc4 = from_timer(vc4, t, bo_cache.time_timer);
655 schedule_work(&vc4->bo_cache.time_work);
659 vc4_prime_export(struct drm_device *dev, struct drm_gem_object *obj, int flags)
661 struct vc4_bo *bo = to_vc4_bo(obj);
662 struct dma_buf *dmabuf;
665 if (bo->validated_shader) {
666 DRM_DEBUG("Attempting to export shader BO\n");
667 return ERR_PTR(-EINVAL);
670 /* Note: as soon as the BO is exported it becomes unpurgeable, because
671 * noone ever decrements the usecnt even if the reference held by the
672 * exported BO is released. This shouldn't be a problem since we don't
673 * expect exported BOs to be marked as purgeable.
675 ret = vc4_bo_inc_usecnt(bo);
677 DRM_ERROR("Failed to increment BO usecnt\n");
681 dmabuf = drm_gem_prime_export(dev, obj, flags);
683 vc4_bo_dec_usecnt(bo);
688 vm_fault_t vc4_fault(struct vm_fault *vmf)
690 struct vm_area_struct *vma = vmf->vma;
691 struct drm_gem_object *obj = vma->vm_private_data;
692 struct vc4_bo *bo = to_vc4_bo(obj);
694 /* The only reason we would end up here is when user-space accesses
695 * BO's memory after it's been purged.
697 mutex_lock(&bo->madv_lock);
698 WARN_ON(bo->madv != __VC4_MADV_PURGED);
699 mutex_unlock(&bo->madv_lock);
701 return VM_FAULT_SIGBUS;
704 int vc4_mmap(struct file *filp, struct vm_area_struct *vma)
706 struct drm_gem_object *gem_obj;
707 unsigned long vm_pgoff;
711 ret = drm_gem_mmap(filp, vma);
715 gem_obj = vma->vm_private_data;
716 bo = to_vc4_bo(gem_obj);
718 if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) {
719 DRM_DEBUG("mmaping of shader BOs for writing not allowed.\n");
723 if (bo->madv != VC4_MADV_WILLNEED) {
724 DRM_DEBUG("mmaping of %s BO not allowed\n",
725 bo->madv == VC4_MADV_DONTNEED ?
726 "purgeable" : "purged");
731 * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the
732 * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map
735 vma->vm_flags &= ~VM_PFNMAP;
737 /* This ->vm_pgoff dance is needed to make all parties happy:
738 * - dma_mmap_wc() uses ->vm_pgoff as an offset within the allocated
739 * mem-region, hence the need to set it to zero (the value set by
740 * the DRM core is a virtual offset encoding the GEM object-id)
741 * - the mmap() core logic needs ->vm_pgoff to be restored to its
742 * initial value before returning from this function because it
743 * encodes the offset of this GEM in the dev->anon_inode pseudo-file
744 * and this information will be used when we invalidate userspace
745 * mappings with drm_vma_node_unmap() (called from vc4_gem_purge()).
747 vm_pgoff = vma->vm_pgoff;
749 ret = dma_mmap_wc(bo->base.base.dev->dev, vma, bo->base.vaddr,
750 bo->base.paddr, vma->vm_end - vma->vm_start);
751 vma->vm_pgoff = vm_pgoff;
754 drm_gem_vm_close(vma);
759 int vc4_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
761 struct vc4_bo *bo = to_vc4_bo(obj);
763 if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) {
764 DRM_DEBUG("mmaping of shader BOs for writing not allowed.\n");
768 return drm_gem_cma_prime_mmap(obj, vma);
771 void *vc4_prime_vmap(struct drm_gem_object *obj)
773 struct vc4_bo *bo = to_vc4_bo(obj);
775 if (bo->validated_shader) {
776 DRM_DEBUG("mmaping of shader BOs not allowed.\n");
777 return ERR_PTR(-EINVAL);
780 return drm_gem_cma_prime_vmap(obj);
783 struct drm_gem_object *
784 vc4_prime_import_sg_table(struct drm_device *dev,
785 struct dma_buf_attachment *attach,
786 struct sg_table *sgt)
788 struct drm_gem_object *obj;
790 obj = drm_gem_cma_prime_import_sg_table(dev, attach, sgt);
794 obj->resv = attach->dmabuf->resv;
799 int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
800 struct drm_file *file_priv)
802 struct drm_vc4_create_bo *args = data;
803 struct vc4_bo *bo = NULL;
807 * We can't allocate from the BO cache, because the BOs don't
808 * get zeroed, and that might leak data between users.
810 bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_V3D);
814 bo->madv = VC4_MADV_WILLNEED;
816 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
817 drm_gem_object_put_unlocked(&bo->base.base);
822 int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
823 struct drm_file *file_priv)
825 struct drm_vc4_mmap_bo *args = data;
826 struct drm_gem_object *gem_obj;
828 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
830 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
834 /* The mmap offset was set up at BO allocation time. */
835 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
837 drm_gem_object_put_unlocked(gem_obj);
842 vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
843 struct drm_file *file_priv)
845 struct drm_vc4_create_shader_bo *args = data;
846 struct vc4_bo *bo = NULL;
852 if (args->size % sizeof(u64) != 0)
855 if (args->flags != 0) {
856 DRM_INFO("Unknown flags set: 0x%08x\n", args->flags);
860 if (args->pad != 0) {
861 DRM_INFO("Pad set: 0x%08x\n", args->pad);
865 bo = vc4_bo_create(dev, args->size, true, VC4_BO_TYPE_V3D_SHADER);
869 bo->madv = VC4_MADV_WILLNEED;
871 if (copy_from_user(bo->base.vaddr,
872 (void __user *)(uintptr_t)args->data,
877 /* Clear the rest of the memory from allocating from the BO
880 memset(bo->base.vaddr + args->size, 0,
881 bo->base.base.size - args->size);
883 bo->validated_shader = vc4_validate_shader(&bo->base);
884 if (!bo->validated_shader) {
889 /* We have to create the handle after validation, to avoid
890 * races for users to do doing things like mmap the shader BO.
892 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
895 drm_gem_object_put_unlocked(&bo->base.base);
901 * vc4_set_tiling_ioctl() - Sets the tiling modifier for a BO.
903 * @data: ioctl argument
904 * @file_priv: DRM file for this fd
906 * The tiling state of the BO decides the default modifier of an fb if
907 * no specific modifier was set by userspace, and the return value of
908 * vc4_get_tiling_ioctl() (so that userspace can treat a BO it
909 * received from dmabuf as the same tiling format as the producer
912 int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
913 struct drm_file *file_priv)
915 struct drm_vc4_set_tiling *args = data;
916 struct drm_gem_object *gem_obj;
920 if (args->flags != 0)
923 switch (args->modifier) {
924 case DRM_FORMAT_MOD_NONE:
927 case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
934 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
936 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
939 bo = to_vc4_bo(gem_obj);
940 bo->t_format = t_format;
942 drm_gem_object_put_unlocked(gem_obj);
948 * vc4_get_tiling_ioctl() - Gets the tiling modifier for a BO.
950 * @data: ioctl argument
951 * @file_priv: DRM file for this fd
953 * Returns the tiling modifier for a BO as set by vc4_set_tiling_ioctl().
955 int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
956 struct drm_file *file_priv)
958 struct drm_vc4_get_tiling *args = data;
959 struct drm_gem_object *gem_obj;
962 if (args->flags != 0 || args->modifier != 0)
965 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
967 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
970 bo = to_vc4_bo(gem_obj);
973 args->modifier = DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED;
975 args->modifier = DRM_FORMAT_MOD_NONE;
977 drm_gem_object_put_unlocked(gem_obj);
982 int vc4_bo_cache_init(struct drm_device *dev)
984 struct vc4_dev *vc4 = to_vc4_dev(dev);
987 /* Create the initial set of BO labels that the kernel will
988 * use. This lets us avoid a bunch of string reallocation in
989 * the kernel's draw and BO allocation paths.
991 vc4->bo_labels = kcalloc(VC4_BO_TYPE_COUNT, sizeof(*vc4->bo_labels),
995 vc4->num_labels = VC4_BO_TYPE_COUNT;
997 BUILD_BUG_ON(ARRAY_SIZE(bo_type_names) != VC4_BO_TYPE_COUNT);
998 for (i = 0; i < VC4_BO_TYPE_COUNT; i++)
999 vc4->bo_labels[i].name = bo_type_names[i];
1001 mutex_init(&vc4->bo_lock);
1003 vc4_debugfs_add_file(dev, "bo_stats", vc4_bo_stats_debugfs, NULL);
1005 INIT_LIST_HEAD(&vc4->bo_cache.time_list);
1007 INIT_WORK(&vc4->bo_cache.time_work, vc4_bo_cache_time_work);
1008 timer_setup(&vc4->bo_cache.time_timer, vc4_bo_cache_time_timer, 0);
1013 void vc4_bo_cache_destroy(struct drm_device *dev)
1015 struct vc4_dev *vc4 = to_vc4_dev(dev);
1018 del_timer(&vc4->bo_cache.time_timer);
1019 cancel_work_sync(&vc4->bo_cache.time_work);
1021 vc4_bo_cache_purge(dev);
1023 for (i = 0; i < vc4->num_labels; i++) {
1024 if (vc4->bo_labels[i].num_allocated) {
1025 DRM_ERROR("Destroying BO cache with %d %s "
1026 "BOs still allocated\n",
1027 vc4->bo_labels[i].num_allocated,
1028 vc4->bo_labels[i].name);
1031 if (is_user_label(i))
1032 kfree(vc4->bo_labels[i].name);
1034 kfree(vc4->bo_labels);
1037 int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
1038 struct drm_file *file_priv)
1040 struct vc4_dev *vc4 = to_vc4_dev(dev);
1041 struct drm_vc4_label_bo *args = data;
1043 struct drm_gem_object *gem_obj;
1049 name = strndup_user(u64_to_user_ptr(args->name), args->len + 1);
1051 return PTR_ERR(name);
1053 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
1055 DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
1060 mutex_lock(&vc4->bo_lock);
1061 label = vc4_get_user_label(vc4, name);
1063 vc4_bo_set_label(gem_obj, label);
1066 mutex_unlock(&vc4->bo_lock);
1068 drm_gem_object_put_unlocked(gem_obj);