1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* exynos_drm_gem.h 3 * 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 created 23 * 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 aligned 26 * in page unit. 27 * @cookie: cookie returned by dma_alloc_attrs 28 * @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 and 31 * device address with IOMMU. 32 * @dma_attrs: attrs passed dma mapping framework 33 * @sgt: Imported sg_table. 34 * 35 * P.S. this object would be transferred to user as kms_bo.handle so 36 * user can access the buffer through kms_bo.handle. 37 */ 38 struct 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 */ 50 void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem); 51 52 /* create a new buffer with gem object */ 53 struct 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 size 60 * that it is calculated with framebuffer information such as width, 61 * height and bpp. 62 */ 63 int 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. */ 67 int 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 for 72 * other drivers such as 2d/3d acceleration drivers. 73 * with this function call, gem object reference count would be increased. 74 */ 75 struct 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 */ 82 static 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. */ 88 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 89 struct drm_file *file_priv); 90 91 /* free gem object. */ 92 void exynos_drm_gem_free_object(struct drm_gem_object *obj); 93 94 /* create memory region for drm framebuffer. */ 95 int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 96 struct drm_device *dev, 97 struct drm_mode_create_dumb *args); 98 99 /* set vm_flags and we can change the vm attribute to other one at here. */ 100 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 101 102 /* low-level interface prime helpers */ 103 struct drm_gem_object *exynos_drm_gem_prime_import(struct drm_device *dev, 104 struct dma_buf *dma_buf); 105 struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj); 106 struct drm_gem_object * 107 exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, 108 struct dma_buf_attachment *attach, 109 struct sg_table *sgt); 110 int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, 111 struct vm_area_struct *vma); 112 113 #endif 114