Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Eric Anholt | 3271 | 66.25% | 20 | 37.74% |
Boris Brezillon | 948 | 19.20% | 3 | 5.66% |
Maxime Ripard | 279 | 5.65% | 8 | 15.09% |
Derek Foreman | 202 | 4.09% | 1 | 1.89% |
Thomas Zimmermann | 95 | 1.92% | 4 | 7.55% |
Paul Kocialkowski | 68 | 1.38% | 2 | 3.77% |
Danilo Krummrich | 24 | 0.49% | 2 | 3.77% |
Kees Cook | 14 | 0.28% | 1 | 1.89% |
Dan Carpenter | 9 | 0.18% | 1 | 1.89% |
Emil Velikov | 7 | 0.14% | 1 | 1.89% |
Maíra Canal | 5 | 0.10% | 1 | 1.89% |
Daniel J Blueman | 4 | 0.08% | 1 | 1.89% |
Oleksandr Andrushchenko | 2 | 0.04% | 1 | 1.89% |
Colin Ian King | 2 | 0.04% | 1 | 1.89% |
Thomas Gleixner | 2 | 0.04% | 1 | 1.89% |
Baoyou Xie | 1 | 0.02% | 1 | 1.89% |
Chi Minghao | 1 | 0.02% | 1 | 1.89% |
Souptick Joarder | 1 | 0.02% | 1 | 1.89% |
Sam Ravnborg | 1 | 0.02% | 1 | 1.89% |
Daniel Vetter | 1 | 0.02% | 1 | 1.89% |
Total | 4937 | 53 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright © 2015 Broadcom */ /** * DOC: VC4 GEM BO management support * * The VC4 GPU architecture (both scanout and rendering) has direct * access to system memory with no MMU in between. To support it, we * use the GEM DMA helper functions to allocate contiguous ranges of * physical memory for our BOs. * * Since the DMA allocator is very slow, we keep a cache of recently * freed BOs around so that the kernel's allocation of objects for 3D * rendering can return quickly. */ #include <linux/dma-buf.h> #include <drm/drm_fourcc.h> #include "vc4_drv.h" #include "uapi/drm/vc4_drm.h" static const struct drm_gem_object_funcs vc4_gem_object_funcs; static const char * const bo_type_names[] = { "kernel", "V3D", "V3D shader", "dumb", "binner", "RCL", "BCL", "kernel BO cache", }; static bool is_user_label(int label) { return label >= VC4_BO_TYPE_COUNT; } static void vc4_bo_stats_print(struct drm_printer *p, struct vc4_dev *vc4) { int i; for (i = 0; i < vc4->num_labels; i++) { if (!vc4->bo_labels[i].num_allocated) continue; drm_printf(p, "%30s: %6dkb BOs (%d)\n", vc4->bo_labels[i].name, vc4->bo_labels[i].size_allocated / 1024, vc4->bo_labels[i].num_allocated); } mutex_lock(&vc4->purgeable.lock); if (vc4->purgeable.num) drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "userspace BO cache", vc4->purgeable.size / 1024, vc4->purgeable.num); if (vc4->purgeable.purged_num) drm_printf(p, "%30s: %6zdkb BOs (%d)\n", "total purged BO", vc4->purgeable.purged_size / 1024, vc4->purgeable.purged_num); mutex_unlock(&vc4->purgeable.lock); } static int vc4_bo_stats_debugfs(struct seq_file *m, void *unused) { struct drm_debugfs_entry *entry = m->private; struct drm_device *dev = entry->dev; struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_printer p = drm_seq_file_printer(m); vc4_bo_stats_print(&p, vc4); return 0; } /* Takes ownership of *name and returns the appropriate slot for it in * the bo_labels[] array, extending it as necessary. * * This is inefficient and could use a hash table instead of walking * an array and strcmp()ing. However, the assumption is that user * labeling will be infrequent (scanout buffers and other long-lived * objects, or debug driver builds), so we can live with it for now. */ static int vc4_get_user_label(struct vc4_dev *vc4, const char *name) { int i; int free_slot = -1; for (i = 0; i < vc4->num_labels; i++) { if (!vc4->bo_labels[i].name) { free_slot = i; } else if (strcmp(vc4->bo_labels[i].name, name) == 0) { kfree(name); return i; } } if (free_slot != -1) { WARN_ON(vc4->bo_labels[free_slot].num_allocated != 0); vc4->bo_labels[free_slot].name = name; return free_slot; } else { u32 new_label_count = vc4->num_labels + 1; struct vc4_label *new_labels = krealloc(vc4->bo_labels, new_label_count * sizeof(*new_labels), GFP_KERNEL); if (!new_labels) { kfree(name); return -1; } free_slot = vc4->num_labels; vc4->bo_labels = new_labels; vc4->num_labels = new_label_count; vc4->bo_labels[free_slot].name = name; vc4->bo_labels[free_slot].num_allocated = 0; vc4->bo_labels[free_slot].size_allocated = 0; return free_slot; } } static void vc4_bo_set_label(struct drm_gem_object *gem_obj, int label) { struct vc4_bo *bo = to_vc4_bo(gem_obj); struct vc4_dev *vc4 = to_vc4_dev(gem_obj->dev); lockdep_assert_held(&vc4->bo_lock); if (label != -1) { vc4->bo_labels[label].num_allocated++; vc4->bo_labels[label].size_allocated += gem_obj->size; } vc4->bo_labels[bo->label].num_allocated--; vc4->bo_labels[bo->label].size_allocated -= gem_obj->size; if (vc4->bo_labels[bo->label].num_allocated == 0 && is_user_label(bo->label)) { /* Free user BO label slots on last unreference. * Slots are just where we track the stats for a given * name, and once a name is unused we can reuse that * slot. */ kfree(vc4->bo_labels[bo->label].name); vc4->bo_labels[bo->label].name = NULL; } bo->label = label; } static uint32_t bo_page_index(size_t size) { return (size / PAGE_SIZE) - 1; } static void vc4_bo_destroy(struct vc4_bo *bo) { struct drm_gem_object *obj = &bo->base.base; struct vc4_dev *vc4 = to_vc4_dev(obj->dev); lockdep_assert_held(&vc4->bo_lock); vc4_bo_set_label(obj, -1); if (bo->validated_shader) { kfree(bo->validated_shader->uniform_addr_offsets); kfree(bo->validated_shader->texture_samples); kfree(bo->validated_shader); bo->validated_shader = NULL; } mutex_destroy(&bo->madv_lock); drm_gem_dma_free(&bo->base); } static void vc4_bo_remove_from_cache(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); lockdep_assert_held(&vc4->bo_lock); list_del(&bo->unref_head); list_del(&bo->size_head); } static struct list_head *vc4_get_cache_list_for_size(struct drm_device *dev, size_t size) { struct vc4_dev *vc4 = to_vc4_dev(dev); uint32_t page_index = bo_page_index(size); if (vc4->bo_cache.size_list_size <= page_index) { uint32_t new_size = max(vc4->bo_cache.size_list_size * 2, page_index + 1); struct list_head *new_list; uint32_t i; new_list = kmalloc_array(new_size, sizeof(struct list_head), GFP_KERNEL); if (!new_list) return NULL; /* Rebase the old cached BO lists to their new list * head locations. */ for (i = 0; i < vc4->bo_cache.size_list_size; i++) { struct list_head *old_list = &vc4->bo_cache.size_list[i]; if (list_empty(old_list)) INIT_LIST_HEAD(&new_list[i]); else list_replace(old_list, &new_list[i]); } /* And initialize the brand new BO list heads. */ for (i = vc4->bo_cache.size_list_size; i < new_size; i++) INIT_LIST_HEAD(&new_list[i]); kfree(vc4->bo_cache.size_list); vc4->bo_cache.size_list = new_list; vc4->bo_cache.size_list_size = new_size; } return &vc4->bo_cache.size_list[page_index]; } static void vc4_bo_cache_purge(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); mutex_lock(&vc4->bo_lock); while (!list_empty(&vc4->bo_cache.time_list)) { struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list, struct vc4_bo, unref_head); vc4_bo_remove_from_cache(bo); vc4_bo_destroy(bo); } mutex_unlock(&vc4->bo_lock); } void vc4_bo_add_to_purgeable_pool(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); if (WARN_ON_ONCE(vc4->is_vc5)) return; mutex_lock(&vc4->purgeable.lock); list_add_tail(&bo->size_head, &vc4->purgeable.list); vc4->purgeable.num++; vc4->purgeable.size += bo->base.base.size; mutex_unlock(&vc4->purgeable.lock); } static void vc4_bo_remove_from_purgeable_pool_locked(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); if (WARN_ON_ONCE(vc4->is_vc5)) return; /* list_del_init() is used here because the caller might release * the purgeable lock in order to acquire the madv one and update the * madv status. * During this short period of time a user might decide to mark * the BO as unpurgeable, and if bo->madv is set to * VC4_MADV_DONTNEED it will try to remove the BO from the * purgeable list which will fail if the ->next/prev fields * are set to LIST_POISON1/LIST_POISON2 (which is what * list_del() does). * Re-initializing the list element guarantees that list_del() * will work correctly even if it's a NOP. */ list_del_init(&bo->size_head); vc4->purgeable.num--; vc4->purgeable.size -= bo->base.base.size; } void vc4_bo_remove_from_purgeable_pool(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); mutex_lock(&vc4->purgeable.lock); vc4_bo_remove_from_purgeable_pool_locked(bo); mutex_unlock(&vc4->purgeable.lock); } static void vc4_bo_purge(struct drm_gem_object *obj) { struct vc4_bo *bo = to_vc4_bo(obj); struct drm_device *dev = obj->dev; WARN_ON(!mutex_is_locked(&bo->madv_lock)); WARN_ON(bo->madv != VC4_MADV_DONTNEED); drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping); dma_free_wc(dev->dev, obj->size, bo->base.vaddr, bo->base.dma_addr); bo->base.vaddr = NULL; bo->madv = __VC4_MADV_PURGED; } static void vc4_bo_userspace_cache_purge(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); mutex_lock(&vc4->purgeable.lock); while (!list_empty(&vc4->purgeable.list)) { struct vc4_bo *bo = list_first_entry(&vc4->purgeable.list, struct vc4_bo, size_head); struct drm_gem_object *obj = &bo->base.base; size_t purged_size = 0; vc4_bo_remove_from_purgeable_pool_locked(bo); /* Release the purgeable lock while we're purging the BO so * that other people can continue inserting things in the * purgeable pool without having to wait for all BOs to be * purged. */ mutex_unlock(&vc4->purgeable.lock); mutex_lock(&bo->madv_lock); /* Since we released the purgeable pool lock before acquiring * the BO madv one, the user may have marked the BO as WILLNEED * and re-used it in the meantime. * Before purging the BO we need to make sure * - it is still marked as DONTNEED * - it has not been re-inserted in the purgeable list * - it is not used by HW blocks * If one of these conditions is not met, just skip the entry. */ if (bo->madv == VC4_MADV_DONTNEED && list_empty(&bo->size_head) && !refcount_read(&bo->usecnt)) { purged_size = bo->base.base.size; vc4_bo_purge(obj); } mutex_unlock(&bo->madv_lock); mutex_lock(&vc4->purgeable.lock); if (purged_size) { vc4->purgeable.purged_size += purged_size; vc4->purgeable.purged_num++; } } mutex_unlock(&vc4->purgeable.lock); } static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev, uint32_t size, enum vc4_kernel_bo_type type) { struct vc4_dev *vc4 = to_vc4_dev(dev); uint32_t page_index = bo_page_index(size); struct vc4_bo *bo = NULL; mutex_lock(&vc4->bo_lock); if (page_index >= vc4->bo_cache.size_list_size) goto out; if (list_empty(&vc4->bo_cache.size_list[page_index])) goto out; bo = list_first_entry(&vc4->bo_cache.size_list[page_index], struct vc4_bo, size_head); vc4_bo_remove_from_cache(bo); kref_init(&bo->base.base.refcount); out: if (bo) vc4_bo_set_label(&bo->base.base, type); mutex_unlock(&vc4->bo_lock); return bo; } /** * vc4_create_object - Implementation of driver->gem_create_object. * @dev: DRM device * @size: Size in bytes of the memory the object will reference * * This lets the DMA helpers allocate object structs for us, and keep * our BO stats correct. */ struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_bo *bo; if (WARN_ON_ONCE(vc4->is_vc5)) return ERR_PTR(-ENODEV); bo = kzalloc(sizeof(*bo), GFP_KERNEL); if (!bo) return ERR_PTR(-ENOMEM); bo->madv = VC4_MADV_WILLNEED; refcount_set(&bo->usecnt, 0); mutex_init(&bo->madv_lock); mutex_lock(&vc4->bo_lock); bo->label = VC4_BO_TYPE_KERNEL; vc4->bo_labels[VC4_BO_TYPE_KERNEL].num_allocated++; vc4->bo_labels[VC4_BO_TYPE_KERNEL].size_allocated += size; mutex_unlock(&vc4->bo_lock); bo->base.base.funcs = &vc4_gem_object_funcs; return &bo->base.base; } struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size, bool allow_unzeroed, enum vc4_kernel_bo_type type) { size_t size = roundup(unaligned_size, PAGE_SIZE); struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_gem_dma_object *dma_obj; struct vc4_bo *bo; if (WARN_ON_ONCE(vc4->is_vc5)) return ERR_PTR(-ENODEV); if (size == 0) return ERR_PTR(-EINVAL); /* First, try to get a vc4_bo from the kernel BO cache. */ bo = vc4_bo_get_from_cache(dev, size, type); if (bo) { if (!allow_unzeroed) memset(bo->base.vaddr, 0, bo->base.base.size); return bo; } dma_obj = drm_gem_dma_create(dev, size); if (IS_ERR(dma_obj)) { /* * If we've run out of DMA memory, kill the cache of * DMA allocations we've got laying around and try again. */ vc4_bo_cache_purge(dev); dma_obj = drm_gem_dma_create(dev, size); } if (IS_ERR(dma_obj)) { /* * Still not enough DMA memory, purge the userspace BO * cache and retry. * This is sub-optimal since we purge the whole userspace * BO cache which forces user that want to re-use the BO to * restore its initial content. * Ideally, we should purge entries one by one and retry * after each to see if DMA allocation succeeds. Or even * better, try to find an entry with at least the same * size. */ vc4_bo_userspace_cache_purge(dev); dma_obj = drm_gem_dma_create(dev, size); } if (IS_ERR(dma_obj)) { struct drm_printer p = drm_info_printer(vc4->base.dev); DRM_ERROR("Failed to allocate from GEM DMA helper:\n"); vc4_bo_stats_print(&p, vc4); return ERR_PTR(-ENOMEM); } bo = to_vc4_bo(&dma_obj->base); /* By default, BOs do not support the MADV ioctl. This will be enabled * only on BOs that are exposed to userspace (V3D, V3D_SHADER and DUMB * BOs). */ bo->madv = __VC4_MADV_NOTSUPP; mutex_lock(&vc4->bo_lock); vc4_bo_set_label(&dma_obj->base, type); mutex_unlock(&vc4->bo_lock); return bo; } int vc4_bo_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_bo *bo = NULL; int ret; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; ret = vc4_dumb_fixup_args(args); if (ret) return ret; bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_DUMB); if (IS_ERR(bo)) return PTR_ERR(bo); bo->madv = VC4_MADV_WILLNEED; ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle); drm_gem_object_put(&bo->base.base); return ret; } static void vc4_bo_cache_free_old(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); unsigned long expire_time = jiffies - msecs_to_jiffies(1000); lockdep_assert_held(&vc4->bo_lock); while (!list_empty(&vc4->bo_cache.time_list)) { struct vc4_bo *bo = list_last_entry(&vc4->bo_cache.time_list, struct vc4_bo, unref_head); if (time_before(expire_time, bo->free_time)) { mod_timer(&vc4->bo_cache.time_timer, round_jiffies_up(jiffies + msecs_to_jiffies(1000))); return; } vc4_bo_remove_from_cache(bo); vc4_bo_destroy(bo); } } /* Called on the last userspace/kernel unreference of the BO. Returns * it to the BO cache if possible, otherwise frees it. */ static void vc4_free_object(struct drm_gem_object *gem_bo) { struct drm_device *dev = gem_bo->dev; struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_bo *bo = to_vc4_bo(gem_bo); struct list_head *cache_list; /* Remove the BO from the purgeable list. */ mutex_lock(&bo->madv_lock); if (bo->madv == VC4_MADV_DONTNEED && !refcount_read(&bo->usecnt)) vc4_bo_remove_from_purgeable_pool(bo); mutex_unlock(&bo->madv_lock); mutex_lock(&vc4->bo_lock); /* If the object references someone else's memory, we can't cache it. */ if (gem_bo->import_attach) { vc4_bo_destroy(bo); goto out; } /* Don't cache if it was publicly named. */ if (gem_bo->name) { vc4_bo_destroy(bo); goto out; } /* If this object was partially constructed but DMA allocation * had failed, just free it. Can also happen when the BO has been * purged. */ if (!bo->base.vaddr) { vc4_bo_destroy(bo); goto out; } cache_list = vc4_get_cache_list_for_size(dev, gem_bo->size); if (!cache_list) { vc4_bo_destroy(bo); goto out; } if (bo->validated_shader) { kfree(bo->validated_shader->uniform_addr_offsets); kfree(bo->validated_shader->texture_samples); kfree(bo->validated_shader); bo->validated_shader = NULL; } /* Reset madv and usecnt before adding the BO to the cache. */ bo->madv = __VC4_MADV_NOTSUPP; refcount_set(&bo->usecnt, 0); bo->t_format = false; bo->free_time = jiffies; list_add(&bo->size_head, cache_list); list_add(&bo->unref_head, &vc4->bo_cache.time_list); vc4_bo_set_label(&bo->base.base, VC4_BO_TYPE_KERNEL_CACHE); vc4_bo_cache_free_old(dev); out: mutex_unlock(&vc4->bo_lock); } static void vc4_bo_cache_time_work(struct work_struct *work) { struct vc4_dev *vc4 = container_of(work, struct vc4_dev, bo_cache.time_work); struct drm_device *dev = &vc4->base; mutex_lock(&vc4->bo_lock); vc4_bo_cache_free_old(dev); mutex_unlock(&vc4->bo_lock); } int vc4_bo_inc_usecnt(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); int ret; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; /* Fast path: if the BO is already retained by someone, no need to * check the madv status. */ if (refcount_inc_not_zero(&bo->usecnt)) return 0; mutex_lock(&bo->madv_lock); switch (bo->madv) { case VC4_MADV_WILLNEED: if (!refcount_inc_not_zero(&bo->usecnt)) refcount_set(&bo->usecnt, 1); ret = 0; break; case VC4_MADV_DONTNEED: /* We shouldn't use a BO marked as purgeable if at least * someone else retained its content by incrementing usecnt. * Luckily the BO hasn't been purged yet, but something wrong * is happening here. Just throw an error instead of * authorizing this use case. */ case __VC4_MADV_PURGED: /* We can't use a purged BO. */ default: /* Invalid madv value. */ ret = -EINVAL; break; } mutex_unlock(&bo->madv_lock); return ret; } void vc4_bo_dec_usecnt(struct vc4_bo *bo) { struct vc4_dev *vc4 = to_vc4_dev(bo->base.base.dev); if (WARN_ON_ONCE(vc4->is_vc5)) return; /* Fast path: if the BO is still retained by someone, no need to test * the madv value. */ if (refcount_dec_not_one(&bo->usecnt)) return; mutex_lock(&bo->madv_lock); if (refcount_dec_and_test(&bo->usecnt) && bo->madv == VC4_MADV_DONTNEED) vc4_bo_add_to_purgeable_pool(bo); mutex_unlock(&bo->madv_lock); } static void vc4_bo_cache_time_timer(struct timer_list *t) { struct vc4_dev *vc4 = from_timer(vc4, t, bo_cache.time_timer); schedule_work(&vc4->bo_cache.time_work); } static struct dma_buf *vc4_prime_export(struct drm_gem_object *obj, int flags) { struct vc4_bo *bo = to_vc4_bo(obj); struct dma_buf *dmabuf; int ret; if (bo->validated_shader) { DRM_DEBUG("Attempting to export shader BO\n"); return ERR_PTR(-EINVAL); } /* Note: as soon as the BO is exported it becomes unpurgeable, because * noone ever decrements the usecnt even if the reference held by the * exported BO is released. This shouldn't be a problem since we don't * expect exported BOs to be marked as purgeable. */ ret = vc4_bo_inc_usecnt(bo); if (ret) { DRM_ERROR("Failed to increment BO usecnt\n"); return ERR_PTR(ret); } dmabuf = drm_gem_prime_export(obj, flags); if (IS_ERR(dmabuf)) vc4_bo_dec_usecnt(bo); return dmabuf; } static vm_fault_t vc4_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct drm_gem_object *obj = vma->vm_private_data; struct vc4_bo *bo = to_vc4_bo(obj); /* The only reason we would end up here is when user-space accesses * BO's memory after it's been purged. */ mutex_lock(&bo->madv_lock); WARN_ON(bo->madv != __VC4_MADV_PURGED); mutex_unlock(&bo->madv_lock); return VM_FAULT_SIGBUS; } static int vc4_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) { struct vc4_bo *bo = to_vc4_bo(obj); if (bo->validated_shader && (vma->vm_flags & VM_WRITE)) { DRM_DEBUG("mmapping of shader BOs for writing not allowed.\n"); return -EINVAL; } if (bo->madv != VC4_MADV_WILLNEED) { DRM_DEBUG("mmapping of %s BO not allowed\n", bo->madv == VC4_MADV_DONTNEED ? "purgeable" : "purged"); return -EINVAL; } return drm_gem_dma_mmap(&bo->base, vma); } static const struct vm_operations_struct vc4_vm_ops = { .fault = vc4_fault, .open = drm_gem_vm_open, .close = drm_gem_vm_close, }; static const struct drm_gem_object_funcs vc4_gem_object_funcs = { .free = vc4_free_object, .export = vc4_prime_export, .get_sg_table = drm_gem_dma_object_get_sg_table, .vmap = drm_gem_dma_object_vmap, .mmap = vc4_gem_object_mmap, .vm_ops = &vc4_vm_ops, }; static int vc4_grab_bin_bo(struct vc4_dev *vc4, struct vc4_file *vc4file) { if (!vc4->v3d) return -ENODEV; if (vc4file->bin_bo_used) return 0; return vc4_v3d_bin_bo_get(vc4, &vc4file->bin_bo_used); } int vc4_create_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_vc4_create_bo *args = data; struct vc4_file *vc4file = file_priv->driver_priv; struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_bo *bo = NULL; int ret; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; ret = vc4_grab_bin_bo(vc4, vc4file); if (ret) return ret; /* * We can't allocate from the BO cache, because the BOs don't * get zeroed, and that might leak data between users. */ bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_V3D); if (IS_ERR(bo)) return PTR_ERR(bo); bo->madv = VC4_MADV_WILLNEED; ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle); drm_gem_object_put(&bo->base.base); return ret; } int vc4_mmap_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_vc4_mmap_bo *args = data; struct drm_gem_object *gem_obj; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -EINVAL; } /* The mmap offset was set up at BO allocation time. */ args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node); drm_gem_object_put(gem_obj); return 0; } int vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_vc4_create_shader_bo *args = data; struct vc4_file *vc4file = file_priv->driver_priv; struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_bo *bo = NULL; int ret; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; if (args->size == 0) return -EINVAL; if (args->size % sizeof(u64) != 0) return -EINVAL; if (args->flags != 0) { DRM_INFO("Unknown flags set: 0x%08x\n", args->flags); return -EINVAL; } if (args->pad != 0) { DRM_INFO("Pad set: 0x%08x\n", args->pad); return -EINVAL; } ret = vc4_grab_bin_bo(vc4, vc4file); if (ret) return ret; bo = vc4_bo_create(dev, args->size, true, VC4_BO_TYPE_V3D_SHADER); if (IS_ERR(bo)) return PTR_ERR(bo); bo->madv = VC4_MADV_WILLNEED; if (copy_from_user(bo->base.vaddr, (void __user *)(uintptr_t)args->data, args->size)) { ret = -EFAULT; goto fail; } /* Clear the rest of the memory from allocating from the BO * cache. */ memset(bo->base.vaddr + args->size, 0, bo->base.base.size - args->size); bo->validated_shader = vc4_validate_shader(&bo->base); if (!bo->validated_shader) { ret = -EINVAL; goto fail; } /* We have to create the handle after validation, to avoid * races for users to do doing things like mmap the shader BO. */ ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle); fail: drm_gem_object_put(&bo->base.base); return ret; } /** * vc4_set_tiling_ioctl() - Sets the tiling modifier for a BO. * @dev: DRM device * @data: ioctl argument * @file_priv: DRM file for this fd * * The tiling state of the BO decides the default modifier of an fb if * no specific modifier was set by userspace, and the return value of * vc4_get_tiling_ioctl() (so that userspace can treat a BO it * received from dmabuf as the same tiling format as the producer * used). */ int vc4_set_tiling_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_vc4_set_tiling *args = data; struct drm_gem_object *gem_obj; struct vc4_bo *bo; bool t_format; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; if (args->flags != 0) return -EINVAL; switch (args->modifier) { case DRM_FORMAT_MOD_NONE: t_format = false; break; case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: t_format = true; break; default: return -EINVAL; } gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -ENOENT; } bo = to_vc4_bo(gem_obj); bo->t_format = t_format; drm_gem_object_put(gem_obj); return 0; } /** * vc4_get_tiling_ioctl() - Gets the tiling modifier for a BO. * @dev: DRM device * @data: ioctl argument * @file_priv: DRM file for this fd * * Returns the tiling modifier for a BO as set by vc4_set_tiling_ioctl(). */ int vc4_get_tiling_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_vc4_get_tiling *args = data; struct drm_gem_object *gem_obj; struct vc4_bo *bo; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; if (args->flags != 0 || args->modifier != 0) return -EINVAL; gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle); return -ENOENT; } bo = to_vc4_bo(gem_obj); if (bo->t_format) args->modifier = DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED; else args->modifier = DRM_FORMAT_MOD_NONE; drm_gem_object_put(gem_obj); return 0; } int vc4_bo_debugfs_init(struct drm_minor *minor) { struct drm_device *drm = minor->dev; struct vc4_dev *vc4 = to_vc4_dev(drm); if (!vc4->v3d) return -ENODEV; drm_debugfs_add_file(drm, "bo_stats", vc4_bo_stats_debugfs, NULL); return 0; } static void vc4_bo_cache_destroy(struct drm_device *dev, void *unused); int vc4_bo_cache_init(struct drm_device *dev) { struct vc4_dev *vc4 = to_vc4_dev(dev); int ret; int i; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; /* Create the initial set of BO labels that the kernel will * use. This lets us avoid a bunch of string reallocation in * the kernel's draw and BO allocation paths. */ vc4->bo_labels = kcalloc(VC4_BO_TYPE_COUNT, sizeof(*vc4->bo_labels), GFP_KERNEL); if (!vc4->bo_labels) return -ENOMEM; vc4->num_labels = VC4_BO_TYPE_COUNT; BUILD_BUG_ON(ARRAY_SIZE(bo_type_names) != VC4_BO_TYPE_COUNT); for (i = 0; i < VC4_BO_TYPE_COUNT; i++) vc4->bo_labels[i].name = bo_type_names[i]; ret = drmm_mutex_init(dev, &vc4->bo_lock); if (ret) { kfree(vc4->bo_labels); return ret; } INIT_LIST_HEAD(&vc4->bo_cache.time_list); INIT_WORK(&vc4->bo_cache.time_work, vc4_bo_cache_time_work); timer_setup(&vc4->bo_cache.time_timer, vc4_bo_cache_time_timer, 0); return drmm_add_action_or_reset(dev, vc4_bo_cache_destroy, NULL); } static void vc4_bo_cache_destroy(struct drm_device *dev, void *unused) { struct vc4_dev *vc4 = to_vc4_dev(dev); int i; del_timer(&vc4->bo_cache.time_timer); cancel_work_sync(&vc4->bo_cache.time_work); vc4_bo_cache_purge(dev); for (i = 0; i < vc4->num_labels; i++) { if (vc4->bo_labels[i].num_allocated) { DRM_ERROR("Destroying BO cache with %d %s " "BOs still allocated\n", vc4->bo_labels[i].num_allocated, vc4->bo_labels[i].name); } if (is_user_label(i)) kfree(vc4->bo_labels[i].name); } kfree(vc4->bo_labels); } int vc4_label_bo_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_vc4_label_bo *args = data; char *name; struct drm_gem_object *gem_obj; int ret = 0, label; if (WARN_ON_ONCE(vc4->is_vc5)) return -ENODEV; if (!args->len) return -EINVAL; name = strndup_user(u64_to_user_ptr(args->name), args->len + 1); if (IS_ERR(name)) return PTR_ERR(name); gem_obj = drm_gem_object_lookup(file_priv, args->handle); if (!gem_obj) { DRM_ERROR("Failed to look up GEM BO %d\n", args->handle); kfree(name); return -ENOENT; } mutex_lock(&vc4->bo_lock); label = vc4_get_user_label(vc4, name); if (label != -1) vc4_bo_set_label(gem_obj, label); else ret = -ENOMEM; mutex_unlock(&vc4->bo_lock); drm_gem_object_put(gem_obj); return ret; }
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