| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rob Herring | 784 | 63.74% | 8 | 30.77% |
| Boris Brezillon | 388 | 31.54% | 5 | 19.23% |
| Thomas Zimmermann | 37 | 3.01% | 5 | 19.23% |
| Robin Murphy | 9 | 0.73% | 1 | 3.85% |
| Marek Szyprowski | 4 | 0.33% | 1 | 3.85% |
| Tomeu Vizoso | 3 | 0.24% | 1 | 3.85% |
| Yue haibing | 1 | 0.08% | 1 | 3.85% |
| Gerd Hoffmann | 1 | 0.08% | 1 | 3.85% |
| Emil Velikov | 1 | 0.08% | 1 | 3.85% |
| Denis Efremov | 1 | 0.08% | 1 | 3.85% |
| Steven Price | 1 | 0.08% | 1 | 3.85% |
| Total | 1230 | 26 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */ #include <linux/err.h> #include <linux/slab.h> #include <linux/dma-buf.h> #include <linux/dma-mapping.h> #include <drm/panfrost_drm.h> #include "panfrost_device.h" #include "panfrost_gem.h" #include "panfrost_mmu.h" /* Called DRM core on the last userspace/kernel unreference of the * BO. */ static void panfrost_gem_free_object(struct drm_gem_object *obj) { struct panfrost_gem_object *bo = to_panfrost_bo(obj); struct panfrost_device *pfdev = obj->dev->dev_private; /* * Make sure the BO is no longer inserted in the shrinker list before * taking care of the destruction itself. If we don't do that we have a * race condition between this function and what's done in * panfrost_gem_shrinker_scan(). */ mutex_lock(&pfdev->shrinker_lock); list_del_init(&bo->base.madv_list); mutex_unlock(&pfdev->shrinker_lock); /* * If we still have mappings attached to the BO, there's a problem in * our refcounting. */ WARN_ON_ONCE(!list_empty(&bo->mappings.list)); if (bo->sgts) { int i; int n_sgt = bo->base.base.size / SZ_2M; for (i = 0; i < n_sgt; i++) { if (bo->sgts[i].sgl) { dma_unmap_sgtable(pfdev->dev, &bo->sgts[i], DMA_BIDIRECTIONAL, 0); sg_free_table(&bo->sgts[i]); } } kvfree(bo->sgts); } drm_gem_shmem_free(&bo->base); } struct panfrost_gem_mapping * panfrost_gem_mapping_get(struct panfrost_gem_object *bo, struct panfrost_file_priv *priv) { struct panfrost_gem_mapping *iter, *mapping = NULL; mutex_lock(&bo->mappings.lock); list_for_each_entry(iter, &bo->mappings.list, node) { if (iter->mmu == priv->mmu) { kref_get(&iter->refcount); mapping = iter; break; } } mutex_unlock(&bo->mappings.lock); return mapping; } static void panfrost_gem_teardown_mapping(struct panfrost_gem_mapping *mapping) { if (mapping->active) panfrost_mmu_unmap(mapping); spin_lock(&mapping->mmu->mm_lock); if (drm_mm_node_allocated(&mapping->mmnode)) drm_mm_remove_node(&mapping->mmnode); spin_unlock(&mapping->mmu->mm_lock); } static void panfrost_gem_mapping_release(struct kref *kref) { struct panfrost_gem_mapping *mapping; mapping = container_of(kref, struct panfrost_gem_mapping, refcount); panfrost_gem_teardown_mapping(mapping); drm_gem_object_put(&mapping->obj->base.base); panfrost_mmu_ctx_put(mapping->mmu); kfree(mapping); } void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping) { if (!mapping) return; kref_put(&mapping->refcount, panfrost_gem_mapping_release); } void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo) { struct panfrost_gem_mapping *mapping; list_for_each_entry(mapping, &bo->mappings.list, node) panfrost_gem_teardown_mapping(mapping); } int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv) { int ret; size_t size = obj->size; u64 align; struct panfrost_gem_object *bo = to_panfrost_bo(obj); unsigned long color = bo->noexec ? PANFROST_BO_NOEXEC : 0; struct panfrost_file_priv *priv = file_priv->driver_priv; struct panfrost_gem_mapping *mapping; mapping = kzalloc(sizeof(*mapping), GFP_KERNEL); if (!mapping) return -ENOMEM; INIT_LIST_HEAD(&mapping->node); kref_init(&mapping->refcount); drm_gem_object_get(obj); mapping->obj = bo; /* * Executable buffers cannot cross a 16MB boundary as the program * counter is 24-bits. We assume executable buffers will be less than * 16MB and aligning executable buffers to their size will avoid * crossing a 16MB boundary. */ if (!bo->noexec) align = size >> PAGE_SHIFT; else align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0; mapping->mmu = panfrost_mmu_ctx_get(priv->mmu); spin_lock(&mapping->mmu->mm_lock); ret = drm_mm_insert_node_generic(&mapping->mmu->mm, &mapping->mmnode, size >> PAGE_SHIFT, align, color, 0); spin_unlock(&mapping->mmu->mm_lock); if (ret) goto err; if (!bo->is_heap) { ret = panfrost_mmu_map(mapping); if (ret) goto err; } mutex_lock(&bo->mappings.lock); WARN_ON(bo->base.madv != PANFROST_MADV_WILLNEED); list_add_tail(&mapping->node, &bo->mappings.list); mutex_unlock(&bo->mappings.lock); err: if (ret) panfrost_gem_mapping_put(mapping); return ret; } void panfrost_gem_close(struct drm_gem_object *obj, struct drm_file *file_priv) { struct panfrost_file_priv *priv = file_priv->driver_priv; struct panfrost_gem_object *bo = to_panfrost_bo(obj); struct panfrost_gem_mapping *mapping = NULL, *iter; mutex_lock(&bo->mappings.lock); list_for_each_entry(iter, &bo->mappings.list, node) { if (iter->mmu == priv->mmu) { mapping = iter; list_del(&iter->node); break; } } mutex_unlock(&bo->mappings.lock); panfrost_gem_mapping_put(mapping); } static int panfrost_gem_pin(struct drm_gem_object *obj) { struct panfrost_gem_object *bo = to_panfrost_bo(obj); if (bo->is_heap) return -EINVAL; return drm_gem_shmem_pin(&bo->base); } static const struct drm_gem_object_funcs panfrost_gem_funcs = { .free = panfrost_gem_free_object, .open = panfrost_gem_open, .close = panfrost_gem_close, .print_info = drm_gem_shmem_object_print_info, .pin = panfrost_gem_pin, .unpin = drm_gem_shmem_object_unpin, .get_sg_table = drm_gem_shmem_object_get_sg_table, .vmap = drm_gem_shmem_object_vmap, .vunmap = drm_gem_shmem_object_vunmap, .mmap = drm_gem_shmem_object_mmap, .vm_ops = &drm_gem_shmem_vm_ops, }; /** * panfrost_gem_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 GEM helpers allocate object structs for us, and keep * our BO stats correct. */ struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t size) { struct panfrost_device *pfdev = dev->dev_private; struct panfrost_gem_object *obj; obj = kzalloc(sizeof(*obj), GFP_KERNEL); if (!obj) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&obj->mappings.list); mutex_init(&obj->mappings.lock); obj->base.base.funcs = &panfrost_gem_funcs; obj->base.map_wc = !pfdev->coherent; return &obj->base.base; } struct panfrost_gem_object * panfrost_gem_create(struct drm_device *dev, size_t size, u32 flags) { struct drm_gem_shmem_object *shmem; struct panfrost_gem_object *bo; /* Round up heap allocations to 2MB to keep fault handling simple */ if (flags & PANFROST_BO_HEAP) size = roundup(size, SZ_2M); shmem = drm_gem_shmem_create(dev, size); if (IS_ERR(shmem)) return ERR_CAST(shmem); bo = to_panfrost_bo(&shmem->base); bo->noexec = !!(flags & PANFROST_BO_NOEXEC); bo->is_heap = !!(flags & PANFROST_BO_HEAP); return bo; } struct drm_gem_object * panfrost_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt) { struct drm_gem_object *obj; struct panfrost_gem_object *bo; obj = drm_gem_shmem_prime_import_sg_table(dev, attach, sgt); if (IS_ERR(obj)) return ERR_CAST(obj); bo = to_panfrost_bo(obj); bo->noexec = true; return obj; }