1 /* exynos_drm_gem.h 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authoer: Inki Dae <inki.dae@samsung.com> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12 #ifndef _EXYNOS_DRM_GEM_H_ 13 #define _EXYNOS_DRM_GEM_H_ 14 15 #include <drm/drm_gem.h> 16 17 #define to_exynos_gem(x) container_of(x, struct exynos_drm_gem, base) 18 19 #define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG) 20 21 /* 22 * exynos drm buffer structure. 23 * 24 * @base: a gem object. 25 * - a new handle to this gem object would be created 26 * by drm_gem_handle_create(). 27 * @buffer: a pointer to exynos_drm_gem_buffer object. 28 * - contain the information to memory region allocated 29 * by user request or at framebuffer creation. 30 * continuous memory region allocated by user request 31 * or at framebuffer creation. 32 * @flags: indicate memory type to allocated buffer and cache attruibute. 33 * @size: size requested from user, in bytes and this size is aligned 34 * in page unit. 35 * @cookie: cookie returned by dma_alloc_attrs 36 * @kvaddr: kernel virtual address to allocated memory region. 37 * @dma_addr: bus address(accessed by dma) to allocated memory region. 38 * - this address could be physical address without IOMMU and 39 * device address with IOMMU. 40 * @pages: Array of backing pages. 41 * @sgt: Imported sg_table. 42 * 43 * P.S. this object would be transferred to user as kms_bo.handle so 44 * user can access the buffer through kms_bo.handle. 45 */ 46 struct exynos_drm_gem { 47 struct drm_gem_object base; 48 unsigned int flags; 49 unsigned long size; 50 void *cookie; 51 void __iomem *kvaddr; 52 dma_addr_t dma_addr; 53 struct dma_attrs dma_attrs; 54 struct page **pages; 55 struct sg_table *sgt; 56 }; 57 58 /* destroy a buffer with gem object */ 59 void exynos_drm_gem_destroy(struct exynos_drm_gem *exynos_gem); 60 61 /* create a new buffer with gem object */ 62 struct exynos_drm_gem *exynos_drm_gem_create(struct drm_device *dev, 63 unsigned int flags, 64 unsigned long size); 65 66 /* 67 * request gem object creation and buffer allocation as the size 68 * that it is calculated with framebuffer information such as width, 69 * height and bpp. 70 */ 71 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 72 struct drm_file *file_priv); 73 74 /* get fake-offset of gem object that can be used with mmap. */ 75 int exynos_drm_gem_map_ioctl(struct drm_device *dev, void *data, 76 struct drm_file *file_priv); 77 78 /* 79 * get dma address from gem handle and this function could be used for 80 * other drivers such as 2d/3d acceleration drivers. 81 * with this function call, gem object reference count would be increased. 82 */ 83 dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, 84 unsigned int gem_handle, 85 struct drm_file *filp); 86 87 /* 88 * put dma address from gem handle and this function could be used for 89 * other drivers such as 2d/3d acceleration drivers. 90 * with this function call, gem object reference count would be decreased. 91 */ 92 void exynos_drm_gem_put_dma_addr(struct drm_device *dev, 93 unsigned int gem_handle, 94 struct drm_file *filp); 95 96 /* get buffer information to memory region allocated by gem. */ 97 int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, 98 struct drm_file *file_priv); 99 100 /* get buffer size to gem handle. */ 101 unsigned long exynos_drm_gem_get_size(struct drm_device *dev, 102 unsigned int gem_handle, 103 struct drm_file *file_priv); 104 105 /* free gem object. */ 106 void exynos_drm_gem_free_object(struct drm_gem_object *obj); 107 108 /* create memory region for drm framebuffer. */ 109 int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 110 struct drm_device *dev, 111 struct drm_mode_create_dumb *args); 112 113 /* map memory region for drm framebuffer to user space. */ 114 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 115 struct drm_device *dev, uint32_t handle, 116 uint64_t *offset); 117 118 /* page fault handler and mmap fault address(virtual) to physical memory. */ 119 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); 120 121 /* set vm_flags and we can change the vm attribute to other one at here. */ 122 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 123 124 /* low-level interface prime helpers */ 125 struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj); 126 struct drm_gem_object * 127 exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, 128 struct dma_buf_attachment *attach, 129 struct sg_table *sgt); 130 void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj); 131 void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); 132 int exynos_drm_gem_prime_mmap(struct drm_gem_object *obj, 133 struct vm_area_struct *vma); 134 135 #endif 136