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 struct drm_gem_object_funcs vc4_gem_object_funcs;
26 static const char * const bo_type_names[] = {
37 static bool is_user_label(int label)
39 return label >= VC4_BO_TYPE_COUNT;
42 static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4)
46 for (i = 0; i < vc4->num_labels; i++) {
47 if (!vc4->bo_labels[i].num_allocated)
50 drm_printf(p, "%30s: %6dkb BOs (%d)\n",
51 vc4->bo_labels[i].name,
52 vc4->bo_labels[i].size_allocated / 1024,
53 vc4->bo_labels[i].num_allocated);
56 mutex_lock(&vc4->purgeable.lock);
57 if (vc4->purgeable.num)
58 drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "userspace BO cache",
59 vc4->purgeable.size / 1024, vc4->purgeable.num);
61 if (vc4->purgeable.purged_num)
62 drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "total purged BO",
63 vc4->purgeable.purged_size / 1024,
64 vc4->purgeable.purged_num);
65 mutex_unlock(&vc4->purgeable.lock);
68 static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
70 struct drm_info_node *node = (struct drm_info_node *)m->private;
71 struct drm_device *dev = node->minor->dev;
72 struct vc4_dev *vc4 = to_vc4_dev(dev);
73 struct drm_printer p = drm_seq_file_printer(m);
75 vc4_bo_stats_print(&p, vc4);
80 /* Takes ownership of *name and returns the appropriate slot for it in
81 * the bo_labels[] array, extending it as necessary.
83 * This is inefficient and could use a hash table instead of walking
84 * an array and strcmp()ing. However, the assumption is that user
85 * labeling will be infrequent (scanout buffers and other long-lived
86 * objects, or debug driver builds), so we can live with it for now.
88 static int vc4_get_user_label(struct vc4_dev *vc4, const char *name)
93 for (i = 0; i < vc4->num_labels; i++) {
94 if (!vc4->bo_labels[i].name) {
96 } else if (strcmp(vc4->bo_labels[i].name, name) == 0) {
102 if (free_slot != -1) {
103 WARN_ON(vc4->bo_labels[free_slot].num_allocated != 0);
104 vc4->bo_labels[free_slot].name = name;
107 u32 new_label_count = vc4->num_labels + 1;
108 struct vc4_label *new_labels =
109 krealloc(vc4->bo_labels,
110 new_label_count * sizeof(*new_labels),
118 free_slot = vc4->num_labels;
119 vc4->bo_labels = new_labels;
120 vc4->num_labels = new_label_count;
122 vc4->bo_labels[free_slot].name = name;
123 vc4->bo_labels[free_slot].num_allocated = 0;
124 vc4->bo_labels[free_slot].size_allocated = 0;
130 static void vc4_bo_set_label(struct drm_gem_object *gem_obj, int label)
132 struct vc4_bo *bo = to_vc4_bo(gem_obj);
133 struct vc4_dev *vc4 = to_vc4_dev(gem_obj->dev);
135 lockdep_assert_held(&vc4->bo_lock);
138 vc4->bo_labels[label].num_allocated++;
139 vc4->bo_labels[label].size_allocated += gem_obj->size;
142 vc4->bo_labels[bo->label].num_allocated--;
143 vc4->bo_labels[bo->label].size_allocated -= gem_obj->size;
145 if (vc4->bo_labels[bo->label].num_allocated == 0 &&
146 is_user_label(bo->label)) {
147 /* Free user BO label slots on last unreference.
148 * Slots are just where we track the stats for a given
149 * name, and once a name is unused we can reuse that
152 kfree(vc4->bo_labels[bo->label].name);
153 vc4->bo_labels[bo->label].name = NULL;
159 static uint32_t bo_page_index(size_t size)
161 return (size / PAGE_SIZE) - 1;
164 static void vc4_bo_destroy(struct vc4_bo *bo)
166 struct drm_gem_object *obj = &bo->base.base;
167 struct vc4_dev *vc4 = to_vc4_dev(obj->dev);
169 lockdep_assert_held(&vc4->bo_lock);
171 vc4_bo_set_label(obj, -1);
173 if (bo->validated_shader) {
174 kfree(bo->validated_shader->uniform_addr_offsets);
175 kfree(bo->validated_shader->texture_samples);
176 kfree(bo->validated_shader);
177 bo->validated_shader = NULL;
180 drm_gem_cma_free_object(obj);
183 static void vc4_bo_remove_from_cache(struct vc4_bo *bo)
185 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
187 lockdep_assert_held(&vc4->bo_lock);
188 list_del(&bo->unref_head);
189 list_del(&bo->size_head);
192 static struct list_head *vc4_get_cache_list_for_size(struct drm_device *dev,
195 struct vc4_dev *vc4 = to_vc4_dev(dev);
196 uint32_t page_index = bo_page_index(size);
198 if (vc4->bo_cache.size_list_size <= page_index) {
199 uint32_t new_size = max(vc4->bo_cache.size_list_size * 2,
201 struct list_head *new_list;
204 new_list = kmalloc_array(new_size, sizeof(struct list_head),
209 /* Rebase the old cached BO lists to their new list
212 for (i = 0; i < vc4->bo_cache.size_list_size; i++) {
213 struct list_head *old_list =
214 &vc4->bo_cache.size_list[i];
216 if (list_empty(old_list))
217 INIT_LIST_HEAD(&new_list[i]);
219 list_replace(old_list, &new_list[i]);
221 /* And initialize the brand new BO list heads. */
222 for (i = vc4->bo_cache.size_list_size; i < new_size; i++)
223 INIT_LIST_HEAD(&new_list[i]);
225 kfree(vc4->bo_cache.size_list);
226 vc4->bo_cache.size_list = new_list;
227 vc4->bo_cache.size_list_size = new_size;
230 return &vc4->bo_cache.size_list[page_index];
233 static void vc4_bo_cache_purge(struct drm_device *dev)
235 struct vc4_dev *vc4 = to_vc4_dev(dev);
237 mutex_lock(&vc4->bo_lock);
238 while (!list_empty(&vc4->bo_cache.time_list)) {
239 struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
240 struct vc4_bo, unref_head);
241 vc4_bo_remove_from_cache(bo);
244 mutex_unlock(&vc4->bo_lock);
247 void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo)
249 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
251 if (WARN_ON_ONCE(vc4->is_vc5))
254 mutex_lock(&vc4->purgeable.lock);
255 list_add_tail(&bo->size_head, &vc4->purgeable.list);
256 vc4->purgeable.num++;
257 vc4->purgeable.size += bo->base.base.size;
258 mutex_unlock(&vc4->purgeable.lock);
261 static void vc4_bo_remove_from_purgeable_pool_locked(struct vc4_bo *bo)
263 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
265 if (WARN_ON_ONCE(vc4->is_vc5))
268 /* list_del_init() is used here because the caller might release
269 * the purgeable lock in order to acquire the madv one and update the
271 * During this short period of time a user might decide to mark
272 * the BO as unpurgeable, and if bo->madv is set to
273 * VC4_MADV_DONTNEED it will try to remove the BO from the
274 * purgeable list which will fail if the ->next/prev fields
275 * are set to LIST_POISON1/LIST_POISON2 (which is what
277 * Re-initializing the list element guarantees that list_del()
278 * will work correctly even if it's a NOP.
280 list_del_init(&bo->size_head);
281 vc4->purgeable.num--;
282 vc4->purgeable.size -= bo->base.base.size;
285 void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo)
287 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
289 mutex_lock(&vc4->purgeable.lock);
290 vc4_bo_remove_from_purgeable_pool_locked(bo);
291 mutex_unlock(&vc4->purgeable.lock);
294 static void vc4_bo_purge(struct drm_gem_object *obj)
296 struct vc4_bo *bo = to_vc4_bo(obj);
297 struct drm_device *dev = obj->dev;
299 WARN_ON(!mutex_is_locked(&bo->madv_lock));
300 WARN_ON(bo->madv != VC4_MADV_DONTNEED);
302 drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
304 dma_free_wc(dev->dev, obj->size, bo->base.vaddr, bo->base.paddr);
305 bo->base.vaddr = NULL;
306 bo->madv = __VC4_MADV_PURGED;
309 static void vc4_bo_userspace_cache_purge(struct drm_device *dev)
311 struct vc4_dev *vc4 = to_vc4_dev(dev);
313 mutex_lock(&vc4->purgeable.lock);
314 while (!list_empty(&vc4->purgeable.list)) {
315 struct vc4_bo *bo = list_first_entry(&vc4->purgeable.list,
316 struct vc4_bo, size_head);
317 struct drm_gem_object *obj = &bo->base.base;
318 size_t purged_size = 0;
320 vc4_bo_remove_from_purgeable_pool_locked(bo);
322 /* Release the purgeable lock while we're purging the BO so
323 * that other people can continue inserting things in the
324 * purgeable pool without having to wait for all BOs to be
327 mutex_unlock(&vc4->purgeable.lock);
328 mutex_lock(&bo->madv_lock);
330 /* Since we released the purgeable pool lock before acquiring
331 * the BO madv one, the user may have marked the BO as WILLNEED
332 * and re-used it in the meantime.
333 * Before purging the BO we need to make sure
334 * - it is still marked as DONTNEED
335 * - it has not been re-inserted in the purgeable list
336 * - it is not used by HW blocks
337 * If one of these conditions is not met, just skip the entry.
339 if (bo->madv == VC4_MADV_DONTNEED &&
340 list_empty(&bo->size_head) &&
341 !refcount_read(&bo->usecnt)) {
342 purged_size = bo->base.base.size;
345 mutex_unlock(&bo->madv_lock);
346 mutex_lock(&vc4->purgeable.lock);
349 vc4->purgeable.purged_size += purged_size;
350 vc4->purgeable.purged_num++;
353 mutex_unlock(&vc4->purgeable.lock);
356 static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev,
358 enum vc4_kernel_bo_type type)
360 struct vc4_dev *vc4 = to_vc4_dev(dev);
361 uint32_t page_index = bo_page_index(size);
362 struct vc4_bo *bo = NULL;
364 size = roundup(size, PAGE_SIZE);
366 mutex_lock(&vc4->bo_lock);
367 if (page_index >= vc4->bo_cache.size_list_size)
370 if (list_empty(&vc4->bo_cache.size_list[page_index]))
373 bo = list_first_entry(&vc4->bo_cache.size_list[page_index],
374 struct vc4_bo, size_head);
375 vc4_bo_remove_from_cache(bo);
376 kref_init(&bo->base.base.refcount);
380 vc4_bo_set_label(&bo->base.base, type);
381 mutex_unlock(&vc4->bo_lock);
386 * vc4_create_object - Implementation of driver->gem_create_object.
388 * @size: Size in bytes of the memory the object will reference
390 * This lets the CMA helpers allocate object structs for us, and keep
391 * our BO stats correct.
393 struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size)
395 struct vc4_dev *vc4 = to_vc4_dev(dev);
399 if (WARN_ON_ONCE(vc4->is_vc5))
400 return ERR_PTR(-ENODEV);
402 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
406 bo->madv = VC4_MADV_WILLNEED;
407 refcount_set(&bo->usecnt, 0);
409 ret = drmm_mutex_init(dev, &bo->madv_lock);
413 mutex_lock(&vc4->bo_lock);
414 bo->label = VC4_BO_TYPE_KERNEL;
415 vc4->bo_labels[VC4_BO_TYPE_KERNEL].num_allocated++;
416 vc4->bo_labels[VC4_BO_TYPE_KERNEL].size_allocated += size;
417 mutex_unlock(&vc4->bo_lock);
419 bo->base.base.funcs = &vc4_gem_object_funcs;
421 return &bo->base.base;
424 struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
425 bool allow_unzeroed, enum vc4_kernel_bo_type type)
427 size_t size = roundup(unaligned_size, PAGE_SIZE);
428 struct vc4_dev *vc4 = to_vc4_dev(dev);
429 struct drm_gem_cma_object *cma_obj;
432 if (WARN_ON_ONCE(vc4->is_vc5))
433 return ERR_PTR(-ENODEV);
436 return ERR_PTR(-EINVAL);
438 /* First, try to get a vc4_bo from the kernel BO cache. */
439 bo = vc4_bo_get_from_cache(dev, size, type);
442 memset(bo->base.vaddr, 0, bo->base.base.size);
446 cma_obj = drm_gem_cma_create(dev, size);
447 if (IS_ERR(cma_obj)) {
449 * If we've run out of CMA memory, kill the cache of
450 * CMA allocations we've got laying around and try again.
452 vc4_bo_cache_purge(dev);
453 cma_obj = drm_gem_cma_create(dev, size);
456 if (IS_ERR(cma_obj)) {
458 * Still not enough CMA memory, purge the userspace BO
460 * This is sub-optimal since we purge the whole userspace
461 * BO cache which forces user that want to re-use the BO to
462 * restore its initial content.
463 * Ideally, we should purge entries one by one and retry
464 * after each to see if CMA allocation succeeds. Or even
465 * better, try to find an entry with at least the same
468 vc4_bo_userspace_cache_purge(dev);
469 cma_obj = drm_gem_cma_create(dev, size);
472 if (IS_ERR(cma_obj)) {
473 struct drm_printer p = drm_info_printer(vc4->base.dev);
474 DRM_ERROR("Failed to allocate from CMA:\n");
475 vc4_bo_stats_print(&p, vc4);
476 return ERR_PTR(-ENOMEM);
478 bo = to_vc4_bo(&cma_obj->base);
480 /* By default, BOs do not support the MADV ioctl. This will be enabled
481 * only on BOs that are exposed to userspace (V3D, V3D_SHADER and DUMB
484 bo->madv = __VC4_MADV_NOTSUPP;
486 mutex_lock(&vc4->bo_lock);
487 vc4_bo_set_label(&cma_obj->base, type);
488 mutex_unlock(&vc4->bo_lock);
493 int vc4_bo_dumb_create(struct drm_file *file_priv,
494 struct drm_device *dev,
495 struct drm_mode_create_dumb *args)
497 struct vc4_dev *vc4 = to_vc4_dev(dev);
498 struct vc4_bo *bo = NULL;
501 if (WARN_ON_ONCE(vc4->is_vc5))
504 ret = vc4_dumb_fixup_args(args);
508 bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_DUMB);
512 bo->madv = VC4_MADV_WILLNEED;
514 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
515 drm_gem_object_put(&bo->base.base);
520 static void vc4_bo_cache_free_old(struct drm_device *dev)
522 struct vc4_dev *vc4 = to_vc4_dev(dev);
523 unsigned long expire_time = jiffies - msecs_to_jiffies(1000);
525 lockdep_assert_held(&vc4->bo_lock);
527 while (!list_empty(&vc4->bo_cache.time_list)) {
528 struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list,
529 struct vc4_bo, unref_head);
530 if (time_before(expire_time, bo->free_time)) {
531 mod_timer(&vc4->bo_cache.time_timer,
532 round_jiffies_up(jiffies +
533 msecs_to_jiffies(1000)));
537 vc4_bo_remove_from_cache(bo);
542 /* Called on the last userspace/kernel unreference of the BO. Returns
543 * it to the BO cache if possible, otherwise frees it.
545 static void vc4_free_object(struct drm_gem_object *gem_bo)
547 struct drm_device *dev = gem_bo->dev;
548 struct vc4_dev *vc4 = to_vc4_dev(dev);
549 struct vc4_bo *bo = to_vc4_bo(gem_bo);
550 struct list_head *cache_list;
552 /* Remove the BO from the purgeable list. */
553 mutex_lock(&bo->madv_lock);
554 if (bo->madv == VC4_MADV_DONTNEED && !refcount_read(&bo->usecnt))
555 vc4_bo_remove_from_purgeable_pool(bo);
556 mutex_unlock(&bo->madv_lock);
558 mutex_lock(&vc4->bo_lock);
559 /* If the object references someone else's memory, we can't cache it.
561 if (gem_bo->import_attach) {
566 /* Don't cache if it was publicly named. */
572 /* If this object was partially constructed but CMA allocation
573 * had failed, just free it. Can also happen when the BO has been
576 if (!bo->base.vaddr) {
581 cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size);
587 if (bo->validated_shader) {
588 kfree(bo->validated_shader->uniform_addr_offsets);
589 kfree(bo->validated_shader->texture_samples);
590 kfree(bo->validated_shader);
591 bo->validated_shader = NULL;
594 /* Reset madv and usecnt before adding the BO to the cache. */
595 bo->madv = __VC4_MADV_NOTSUPP;
596 refcount_set(&bo->usecnt, 0);
598 bo->t_format = false;
599 bo->free_time = jiffies;
600 list_add(&bo->size_head, cache_list);
601 list_add(&bo->unref_head, &vc4->bo_cache.time_list);
603 vc4_bo_set_label(&bo->base.base, VC4_BO_TYPE_KERNEL_CACHE);
605 vc4_bo_cache_free_old(dev);
608 mutex_unlock(&vc4->bo_lock);
611 static void vc4_bo_cache_time_work(struct work_struct *work)
613 struct vc4_dev *vc4 =
614 container_of(work, struct vc4_dev, bo_cache.time_work);
615 struct drm_device *dev = &vc4->base;
617 mutex_lock(&vc4->bo_lock);
618 vc4_bo_cache_free_old(dev);
619 mutex_unlock(&vc4->bo_lock);
622 int vc4_bo_inc_usecnt(struct vc4_bo *bo)
624 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
627 if (WARN_ON_ONCE(vc4->is_vc5))
630 /* Fast path: if the BO is already retained by someone, no need to
631 * check the madv status.
633 if (refcount_inc_not_zero(&bo->usecnt))
636 mutex_lock(&bo->madv_lock);
638 case VC4_MADV_WILLNEED:
639 if (!refcount_inc_not_zero(&bo->usecnt))
640 refcount_set(&bo->usecnt, 1);
643 case VC4_MADV_DONTNEED:
644 /* We shouldn't use a BO marked as purgeable if at least
645 * someone else retained its content by incrementing usecnt.
646 * Luckily the BO hasn't been purged yet, but something wrong
647 * is happening here. Just throw an error instead of
648 * authorizing this use case.
650 case __VC4_MADV_PURGED:
651 /* We can't use a purged BO. */
653 /* Invalid madv value. */
657 mutex_unlock(&bo->madv_lock);
662 void vc4_bo_dec_usecnt(struct vc4_bo *bo)
664 struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev);
666 if (WARN_ON_ONCE(vc4->is_vc5))
669 /* Fast path: if the BO is still retained by someone, no need to test
672 if (refcount_dec_not_one(&bo->usecnt))
675 mutex_lock(&bo->madv_lock);
676 if (refcount_dec_and_test(&bo->usecnt) &&
677 bo->madv == VC4_MADV_DONTNEED)
678 vc4_bo_add_to_purgeable_pool(bo);
679 mutex_unlock(&bo->madv_lock);
682 static void vc4_bo_cache_time_timer(struct timer_list *t)
684 struct vc4_dev *vc4 = from_timer(vc4, t, bo_cache.time_timer);
686 schedule_work(&vc4->bo_cache.time_work);
689 static struct dma_buf *vc4_prime_export(struct drm_gem_object *obj, int flags)
691 struct vc4_bo *bo = to_vc4_bo(obj);
692 struct dma_buf *dmabuf;
695 if (bo->validated_shader) {
696 DRM_DEBUG("Attempting to export shader BO\n");
697 return ERR_PTR(-EINVAL);
700 /* Note: as soon as the BO is exported it becomes unpurgeable, because
701 * noone ever decrements the usecnt even if the reference held by the
702 * exported BO is released. This shouldn't be a problem since we don't
703 * expect exported BOs to be marked as purgeable.
705 ret = vc4_bo_inc_usecnt(bo);
707 DRM_ERROR("Failed to increment BO usecnt\n");
711 dmabuf = drm_gem_prime_export(obj, flags);
713 vc4_bo_dec_usecnt(bo);
718 static vm_fault_t vc4_fault(struct vm_fault *vmf)
720 struct vm_area_struct *vma = vmf->vma;
721 struct drm_gem_object *obj = vma->vm_private_data;
722 struct vc4_bo *bo = to_vc4_bo(obj);
724 /* The only reason we would end up here is when user-space accesses
725 * BO's memory after it's been purged.
727 mutex_lock(&bo->madv_lock);
728 WARN_ON(bo->madv != __VC4_MADV_PURGED);
729 mutex_unlock(&bo->madv_lock);
731 return VM_FAULT_SIGBUS;
734 static int vc4_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
736 struct vc4_bo *bo = to_vc4_bo(obj);
738 if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) {
739 DRM_DEBUG("mmaping of shader BOs for writing not allowed.\n");
743 if (bo->madv != VC4_MADV_WILLNEED) {
744 DRM_DEBUG("mmaping of %s BO not allowed\n",
745 bo->madv == VC4_MADV_DONTNEED ?
746 "purgeable" : "purged");
750 return drm_gem_cma_mmap(obj, vma);
753 static const struct vm_operations_struct vc4_vm_ops = {
755 .open = drm_gem_vm_open,
756 .close = drm_gem_vm_close,
759 static const struct drm_gem_object_funcs vc4_gem_object_funcs = {
760 .free = vc4_free_object,
761 .export = vc4_prime_export,
762 .get_sg_table = drm_gem_cma_get_sg_table,
763 .vmap = drm_gem_cma_vmap,
764 .mmap = vc4_gem_object_mmap,
765 .vm_ops = &vc4_vm_ops,
768 static int vc4_grab_bin_bo(struct vc4_dev *vc4, struct vc4_file *vc4file)
775 if (vc4file->bin_bo_used)
778 ret = vc4_v3d_bin_bo_get(vc4, &vc4file->bin_bo_used);
785 int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
786 struct drm_file *file_priv)
788 struct drm_vc4_create_bo *args = data;
789 struct vc4_file *vc4file = file_priv->driver_priv;
790 struct vc4_dev *vc4 = to_vc4_dev(dev);
791 struct vc4_bo *bo = NULL;
794 if (WARN_ON_ONCE(vc4->is_vc5))
797 ret = vc4_grab_bin_bo(vc4, vc4file);
802 * We can't allocate from the BO cache, because the BOs don't
803 * get zeroed, and that might leak data between users.
805 bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_V3D);
809 bo->madv = VC4_MADV_WILLNEED;
811 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
812 drm_gem_object_put(&bo->base.base);
817 int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data,
818 struct drm_file *file_priv)
820 struct vc4_dev *vc4 = to_vc4_dev(dev);
821 struct drm_vc4_mmap_bo *args = data;
822 struct drm_gem_object *gem_obj;
824 if (WARN_ON_ONCE(vc4->is_vc5))
827 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
829 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
833 /* The mmap offset was set up at BO allocation time. */
834 args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
836 drm_gem_object_put(gem_obj);
841 vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
842 struct drm_file *file_priv)
844 struct drm_vc4_create_shader_bo *args = data;
845 struct vc4_file *vc4file = file_priv->driver_priv;
846 struct vc4_dev *vc4 = to_vc4_dev(dev);
847 struct vc4_bo *bo = NULL;
850 if (WARN_ON_ONCE(vc4->is_vc5))
856 if (args->size % sizeof(u64) != 0)
859 if (args->flags != 0) {
860 DRM_INFO("Unknown flags set: 0x%08x\n", args->flags);
864 if (args->pad != 0) {
865 DRM_INFO("Pad set: 0x%08x\n", args->pad);
869 ret = vc4_grab_bin_bo(vc4, vc4file);
873 bo = vc4_bo_create(dev, args->size, true, VC4_BO_TYPE_V3D_SHADER);
877 bo->madv = VC4_MADV_WILLNEED;
879 if (copy_from_user(bo->base.vaddr,
880 (void __user *)(uintptr_t)args->data,
885 /* Clear the rest of the memory from allocating from the BO
888 memset(bo->base.vaddr + args->size, 0,
889 bo->base.base.size - args->size);
891 bo->validated_shader = vc4_validate_shader(&bo->base);
892 if (!bo->validated_shader) {
897 /* We have to create the handle after validation, to avoid
898 * races for users to do doing things like mmap the shader BO.
900 ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
903 drm_gem_object_put(&bo->base.base);
909 * vc4_set_tiling_ioctl() - Sets the tiling modifier for a BO.
911 * @data: ioctl argument
912 * @file_priv: DRM file for this fd
914 * The tiling state of the BO decides the default modifier of an fb if
915 * no specific modifier was set by userspace, and the return value of
916 * vc4_get_tiling_ioctl() (so that userspace can treat a BO it
917 * received from dmabuf as the same tiling format as the producer
920 int vc4_set_tiling_ioctl(struct drm_device *dev, void *data,
921 struct drm_file *file_priv)
923 struct vc4_dev *vc4 = to_vc4_dev(dev);
924 struct drm_vc4_set_tiling *args = data;
925 struct drm_gem_object *gem_obj;
929 if (WARN_ON_ONCE(vc4->is_vc5))
932 if (args->flags != 0)
935 switch (args->modifier) {
936 case DRM_FORMAT_MOD_NONE:
939 case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED:
946 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
948 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
951 bo = to_vc4_bo(gem_obj);
952 bo->t_format = t_format;
954 drm_gem_object_put(gem_obj);
960 * vc4_get_tiling_ioctl() - Gets the tiling modifier for a BO.
962 * @data: ioctl argument
963 * @file_priv: DRM file for this fd
965 * Returns the tiling modifier for a BO as set by vc4_set_tiling_ioctl().
967 int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
968 struct drm_file *file_priv)
970 struct vc4_dev *vc4 = to_vc4_dev(dev);
971 struct drm_vc4_get_tiling *args = data;
972 struct drm_gem_object *gem_obj;
975 if (WARN_ON_ONCE(vc4->is_vc5))
978 if (args->flags != 0 || args->modifier != 0)
981 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
983 DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
986 bo = to_vc4_bo(gem_obj);
989 args->modifier = DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED;
991 args->modifier = DRM_FORMAT_MOD_NONE;
993 drm_gem_object_put(gem_obj);
998 int vc4_bo_debugfs_init(struct drm_minor *minor)
1000 struct drm_device *drm = minor->dev;
1001 struct vc4_dev *vc4 = to_vc4_dev(drm);
1007 ret = vc4_debugfs_add_file(minor, "bo_stats",
1008 vc4_bo_stats_debugfs, NULL);
1015 static void vc4_bo_cache_destroy(struct drm_device *dev, void *unused);
1016 int vc4_bo_cache_init(struct drm_device *dev)
1018 struct vc4_dev *vc4 = to_vc4_dev(dev);
1022 if (WARN_ON_ONCE(vc4->is_vc5))
1025 /* Create the initial set of BO labels that the kernel will
1026 * use. This lets us avoid a bunch of string reallocation in
1027 * the kernel's draw and BO allocation paths.
1029 vc4->bo_labels = kcalloc(VC4_BO_TYPE_COUNT, sizeof(*vc4->bo_labels),
1031 if (!vc4->bo_labels)
1033 vc4->num_labels = VC4_BO_TYPE_COUNT;
1035 BUILD_BUG_ON(ARRAY_SIZE(bo_type_names) != VC4_BO_TYPE_COUNT);
1036 for (i = 0; i < VC4_BO_TYPE_COUNT; i++)
1037 vc4->bo_labels[i].name = bo_type_names[i];
1039 ret = drmm_mutex_init(dev, &vc4->bo_lock);
1041 kfree(vc4->bo_labels);
1045 INIT_LIST_HEAD(&vc4->bo_cache.time_list);
1047 INIT_WORK(&vc4->bo_cache.time_work, vc4_bo_cache_time_work);
1048 timer_setup(&vc4->bo_cache.time_timer, vc4_bo_cache_time_timer, 0);
1050 return drmm_add_action_or_reset(dev, vc4_bo_cache_destroy, NULL);
1053 static void vc4_bo_cache_destroy(struct drm_device *dev, void *unused)
1055 struct vc4_dev *vc4 = to_vc4_dev(dev);
1058 del_timer(&vc4->bo_cache.time_timer);
1059 cancel_work_sync(&vc4->bo_cache.time_work);
1061 vc4_bo_cache_purge(dev);
1063 for (i = 0; i < vc4->num_labels; i++) {
1064 if (vc4->bo_labels[i].num_allocated) {
1065 DRM_ERROR("Destroying BO cache with %d %s "
1066 "BOs still allocated\n",
1067 vc4->bo_labels[i].num_allocated,
1068 vc4->bo_labels[i].name);
1071 if (is_user_label(i))
1072 kfree(vc4->bo_labels[i].name);
1074 kfree(vc4->bo_labels);
1077 int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
1078 struct drm_file *file_priv)
1080 struct vc4_dev *vc4 = to_vc4_dev(dev);
1081 struct drm_vc4_label_bo *args = data;
1083 struct drm_gem_object *gem_obj;
1086 if (WARN_ON_ONCE(vc4->is_vc5))
1092 name = strndup_user(u64_to_user_ptr(args->name), args->len + 1);
1094 return PTR_ERR(name);
1096 gem_obj = drm_gem_object_lookup(file_priv, args->handle);
1098 DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
1103 mutex_lock(&vc4->bo_lock);
1104 label = vc4_get_user_label(vc4, name);
1106 vc4_bo_set_label(gem_obj, label);
1109 mutex_unlock(&vc4->bo_lock);
1111 drm_gem_object_put(gem_obj);