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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/* exynos_drm_gem.h3 *4 * Copyright (c) 2011 Samsung Electronics Co., Ltd.5 * Authoer: Inki Dae <inki.dae@samsung.com>6 */7 8#ifndef _EXYNOS_DRM_GEM_H_9#define _EXYNOS_DRM_GEM_H_10 11#include <drm/drm_gem.h>12#include <linux/mm_types.h>13 14#define to_exynos_gem(x) container_of(x, struct exynos_drm_gem, base)15 16#define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG)17 18/*19 * exynos drm buffer structure.20 *21 * @base: a gem object.22 * - a new handle to this gem object would be created23 * by drm_gem_handle_create().24 * @flags: indicate memory type to allocated buffer and cache attruibute.25 * @size: size requested from user, in bytes and this size is aligned26 * in page unit.27 * @cookie: cookie returned by dma_alloc_attrs28 * @kvaddr: kernel virtual address to allocated memory region (for fbdev)29 * @dma_addr: bus address(accessed by dma) to allocated memory region.30 * - this address could be physical address without IOMMU and31 * device address with IOMMU.32 * @dma_attrs: attrs passed dma mapping framework33 * @sgt: Imported sg_table.34 *35 * P.S. this object would be transferred to user as kms_bo.handle so36 * user can access the buffer through kms_bo.handle.37 */38struct exynos_drm_gem {39 struct drm_gem_object base;40 unsigned int flags;41 unsigned long size;42 void *cookie;43 void *kvaddr;44 dma_addr_t dma_addr;45 unsigned long dma_attrs;46 struct sg_table *sgt;47};48 49/* destroy a buffer with gem object */50void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem);51 52/* create a new buffer with gem object */53struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev,54 unsigned int flags,55 unsigned long size,56 bool kvmap);57 58/*59 * request gem object creation and buffer allocation as the size60 * that it is calculated with framebuffer information such as width,61 * height and bpp.62 */63int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,64 struct drm_file *file_priv);65 66/* get fake-offset of gem object that can be used with mmap. */67int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data,68 struct drm_file *file_priv);69 70/*71 * get exynos drm object from gem handle, this function could be used for72 * other drivers such as 2d/3d acceleration drivers.73 * with this function call, gem object reference count would be increased.74 */75struct exynos_drm_gem *exynos_drm_gem_get(struct drm_file *filp,76 unsigned int gem_handle);77 78/*79 * put exynos drm object acquired from exynos_drm_gem_get(),80 * gem object reference count would be decreased.81 */82static inline void exynos_drm_gem_put(struct exynos_drm_gem *exynos_gem)83{84 drm_gem_object_put(&exynos_gem->base);85}86 87/* get buffer information to memory region allocated by gem. */88int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,89 struct drm_file *file_priv);90 91/* free gem object. */92void exynos_drm_gem_free_object(struct drm_gem_object *obj);93 94/* create memory region for drm framebuffer. */95int exynos_drm_gem_dumb_create(struct drm_file *file_priv,96 struct drm_device *dev,97 struct drm_mode_create_dumb *args);98 99/* low-level interface prime helpers */100struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev,101 struct dma_buf *dma_buf);102struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj);103struct drm_gem_object *104exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,105 struct dma_buf_attachment *attach,106 struct sg_table *sgt);107 108#endif109