1 /* exynos_drm_gem.h 2 * 3 * Copyright (c) 2011 Samsung Electronics Co., Ltd. 4 * Authoer: Inki Dae <inki.dae@samsung.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 #ifndef _EXYNOS_DRM_GEM_H_ 27 #define _EXYNOS_DRM_GEM_H_ 28 29 #define to_exynos_gem_obj(x) container_of(x,\ 30 struct exynos_drm_gem_obj, base) 31 32 /* 33 * exynos drm gem buffer structure. 34 * 35 * @kvaddr: kernel virtual address to allocated memory region. 36 * @dma_addr: bus address(accessed by dma) to allocated memory region. 37 * - this address could be physical address without IOMMU and 38 * device address with IOMMU. 39 * @size: size of allocated memory region. 40 */ 41 struct exynos_drm_gem_buf { 42 void __iomem *kvaddr; 43 dma_addr_t dma_addr; 44 unsigned long size; 45 }; 46 47 /* 48 * exynos drm buffer structure. 49 * 50 * @base: a gem object. 51 * - a new handle to this gem object would be created 52 * by drm_gem_handle_create(). 53 * @buffer: a pointer to exynos_drm_gem_buffer object. 54 * - contain the information to memory region allocated 55 * by user request or at framebuffer creation. 56 * continuous memory region allocated by user request 57 * or at framebuffer creation. 58 * 59 * P.S. this object would be transfered to user as kms_bo.handle so 60 * user can access the buffer through kms_bo.handle. 61 */ 62 struct exynos_drm_gem_obj { 63 struct drm_gem_object base; 64 struct exynos_drm_gem_buf *buffer; 65 }; 66 67 /* destroy a buffer with gem object */ 68 void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj); 69 70 /* create a new buffer with gem object */ 71 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, 72 unsigned long size); 73 74 /* 75 * request gem object creation and buffer allocation as the size 76 * that it is calculated with framebuffer information such as width, 77 * height and bpp. 78 */ 79 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 80 struct drm_file *file_priv); 81 82 /* get buffer offset to map to user space. */ 83 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, 84 struct drm_file *file_priv); 85 86 /* 87 * mmap the physically continuous memory that a gem object contains 88 * to user space. 89 */ 90 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 91 struct drm_file *file_priv); 92 93 /* initialize gem object. */ 94 int exynos_drm_gem_init_object(struct drm_gem_object *obj); 95 96 /* free gem object. */ 97 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj); 98 99 /* create memory region for drm framebuffer. */ 100 int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 101 struct drm_device *dev, 102 struct drm_mode_create_dumb *args); 103 104 /* map memory region for drm framebuffer to user space. */ 105 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 106 struct drm_device *dev, uint32_t handle, 107 uint64_t *offset); 108 109 /* 110 * destroy memory region allocated. 111 * - a gem handle and physical memory region pointed by a gem object 112 * would be released by drm_gem_handle_delete(). 113 */ 114 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, 115 struct drm_device *dev, 116 unsigned int handle); 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 #endif 125