diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_gem.h')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_gem.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h new file mode 100644 index 000000000..79d7e1a87 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h @@ -0,0 +1,108 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* exynos_drm_gem.h + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authoer: Inki Dae <inki.dae@samsung.com> + */ + +#ifndef _EXYNOS_DRM_GEM_H_ +#define _EXYNOS_DRM_GEM_H_ + +#include <drm/drm_gem.h> +#include <linux/mm_types.h> + +#define to_exynos_gem(x) container_of(x, struct exynos_drm_gem, base) + +#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG) + +/* + * exynos drm buffer structure. + * + * @base: a gem object. + * - a new handle to this gem object would be created + * by drm_gem_handle_create(). + * @flags: indicate memory type to allocated buffer and cache attruibute. + * @size: size requested from user, in bytes and this size is aligned + * in page unit. + * @cookie: cookie returned by dma_alloc_attrs + * @kvaddr: kernel virtual address to allocated memory region (for fbdev) + * @dma_addr: bus address(accessed by dma) to allocated memory region. + * - this address could be physical address without IOMMU and + * device address with IOMMU. + * @dma_attrs: attrs passed dma mapping framework + * @sgt: Imported sg_table. + * + * P.S. this object would be transferred to user as kms_bo.handle so + * user can access the buffer through kms_bo.handle. + */ +struct exynos_drm_gem { + struct drm_gem_object base; + unsigned int flags; + unsigned long size; + void *cookie; + void *kvaddr; + dma_addr_t dma_addr; + unsigned long dma_attrs; + struct sg_table *sgt; +}; + +/* destroy a buffer with gem object */ +void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem); + +/* create a new buffer with gem object */ +struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, + unsigned int flags, + unsigned long size, + bool kvmap); + +/* + * request gem object creation and buffer allocation as the size + * that it is calculated with framebuffer information such as width, + * height and bpp. + */ +int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* get fake-offset of gem object that can be used with mmap. */ +int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* + * get exynos drm object from gem handle, this function could be used for + * other drivers such as 2d/3d acceleration drivers. + * with this function call, gem object reference count would be increased. + */ +struct exynos_drm_gem *exynos_drm_gem_get(struct drm_file *filp, + unsigned int gem_handle); + +/* + * put exynos drm object acquired from exynos_drm_gem_get(), + * gem object reference count would be decreased. + */ +static inline void exynos_drm_gem_put(struct exynos_drm_gem *exynos_gem) +{ + drm_gem_object_put(&exynos_gem->base); +} + +/* get buffer information to memory region allocated by gem. */ +int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); + +/* free gem object. */ +void exynos_drm_gem_free_object(struct drm_gem_object *obj); + +/* create memory region for drm framebuffer. */ +int exynos_drm_gem_dumb_create(struct drm_file *file_priv, + struct drm_device *dev, + struct drm_mode_create_dumb *args); + +/* low-level interface prime helpers */ +struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev, + struct dma_buf *dma_buf); +struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj); +struct drm_gem_object * +exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, + struct dma_buf_attachment *attach, + struct sg_table *sgt); + +#endif |