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struct drm_mode_create_dumb; struct drm_printer; struct sg_table; /** * struct drm_gem_shmem_object - GEM object backed by shmem */ struct drm_gem_shmem_object { /** * @base: Base GEM object */ struct drm_gem_object base; /** * @pages_lock: Protects the page table and use count */ struct mutex pages_lock; /** * @pages: Page table */ struct page **pages; /** * @pages_use_count: * * Reference count on the pages table. * The pages are put when the count reaches zero. */ unsigned int pages_use_count; /** * @madv: State for madvise * * 0 is active/inuse. * A negative value is the object is purged. * Positive values are driver specific and not used by the helpers. */ int madv; /** * @madv_list: List entry for madvise tracking * * Typically used by drivers to track purgeable objects */ struct list_head madv_list; /** * @pages_mark_dirty_on_put: * * Mark pages as dirty when they are put. */ unsigned int pages_mark_dirty_on_put : 1; /** * @pages_mark_accessed_on_put: * * Mark pages as accessed when they are put. */ unsigned int pages_mark_accessed_on_put : 1; /** * @sgt: Scatter/gather table for imported PRIME buffers */ struct sg_table *sgt; /** * @vmap_lock: Protects the vmap address and use count */ struct mutex vmap_lock; /** * @vaddr: Kernel virtual address of the backing memory */ void *vaddr; /** * @vmap_use_count: * * Reference count on the virtual address. * The address are un-mapped when the count reaches zero. */ unsigned int vmap_use_count; }; #define to_drm_gem_shmem_obj(obj) \ container_of(obj, struct drm_gem_shmem_object, base) /** * DEFINE_DRM_GEM_SHMEM_FOPS() - Macro to generate file operations for shmem drivers * @name: name for the generated structure * * This macro autogenerates a suitable &struct file_operations for shmem based * drivers, which can be assigned to &drm_driver.fops. Note that this structure * cannot be shared between drivers, because it contains a reference to the * current module using THIS_MODULE. * * Note that the declaration is already marked as static - if you need a * non-static version of this you're probably doing it wrong and will break the * THIS_MODULE reference by accident. */ #define DEFINE_DRM_GEM_SHMEM_FOPS(name) \ static const struct file_operations name = {\ .owner = THIS_MODULE,\ .open = drm_open,\ .release = drm_release,\ .unlocked_ioctl = drm_ioctl,\ .compat_ioctl = drm_compat_ioctl,\ .poll = drm_poll,\ .read = drm_read,\ .llseek = noop_llseek,\ .mmap = drm_gem_shmem_mmap, \ } struct drm_gem_shmem_object *drm_gem_shmem_create(struct drm_device *dev, size_t size); void drm_gem_shmem_free_object(struct drm_gem_object *obj); int drm_gem_shmem_get_pages(struct drm_gem_shmem_object *shmem); void drm_gem_shmem_put_pages(struct drm_gem_shmem_object *shmem); int drm_gem_shmem_pin(struct drm_gem_object *obj); void drm_gem_shmem_unpin(struct drm_gem_object *obj); void *drm_gem_shmem_vmap(struct drm_gem_object *obj); void drm_gem_shmem_vunmap(struct drm_gem_object *obj, void *vaddr); int drm_gem_shmem_madvise(struct drm_gem_object *obj, int madv); static inline bool drm_gem_shmem_is_purgeable(struct drm_gem_shmem_object *shmem) { return (shmem->madv > 0) && !shmem->vmap_use_count && shmem->sgt && !shmem->base.dma_buf && !shmem->base.import_attach; } void drm_gem_shmem_purge_locked(struct drm_gem_object *obj); bool drm_gem_shmem_purge(struct drm_gem_object *obj); struct drm_gem_shmem_object * drm_gem_shmem_create_with_handle(struct drm_file *file_priv, struct drm_device *dev, size_t size, uint32_t *handle); int drm_gem_shmem_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args); int drm_gem_shmem_mmap(struct file *filp, struct vm_area_struct *vma); extern const struct vm_operations_struct drm_gem_shmem_vm_ops; void drm_gem_shmem_print_info(struct drm_printer *p, unsigned int indent, const struct drm_gem_object *obj); struct sg_table *drm_gem_shmem_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object * drm_gem_shmem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sgt); struct sg_table *drm_gem_shmem_get_pages_sgt(struct drm_gem_object *obj); /** * DRM_GEM_SHMEM_DRIVER_OPS - Default shmem GEM operations * * This macro provides a shortcut for setting the shmem GEM operations in * the &drm_driver structure. */ #define DRM_GEM_SHMEM_DRIVER_OPS \ .prime_handle_to_fd = drm_gem_prime_handle_to_fd, \ .prime_fd_to_handle = drm_gem_prime_fd_to_handle, \ .gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table, \ .gem_prime_mmap = drm_gem_prime_mmap, \ .dumb_create = drm_gem_shmem_dumb_create #endif /* __DRM_GEM_SHMEM_HELPER_H__ */