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 buffer structure. 34 * 35 * @base: a gem object. 36 * - a new handle to this gem object would be created 37 * by drm_gem_handle_create(). 38 * @entry: pointer to exynos drm buffer entry object. 39 * - containing the information to physically 40 * continuous memory region allocated by user request 41 * or at framebuffer creation. 42 * 43 * P.S. this object would be transfered to user as kms_bo.handle so 44 * user can access the buffer through kms_bo.handle. 45 */ 46 struct exynos_drm_gem_obj { 47 struct drm_gem_object base; 48 struct exynos_drm_buf_entry *entry; 49 }; 50 51 /* create a new buffer and get a new gem handle. */ 52 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_file *file_priv, 53 struct drm_device *dev, unsigned int size, 54 unsigned int *handle); 55 56 /* 57 * request gem object creation and buffer allocation as the size 58 * that it is calculated with framebuffer information such as width, 59 * height and bpp. 60 */ 61 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, 62 struct drm_file *file_priv); 63 64 /* get buffer offset to map to user space. */ 65 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data, 66 struct drm_file *file_priv); 67 68 /* unmap a buffer from user space. */ 69 int exynos_drm_gem_munmap_ioctl(struct drm_device *dev, void *data, 70 struct drm_file *file_priv); 71 72 /* initialize gem object. */ 73 int exynos_drm_gem_init_object(struct drm_gem_object *obj); 74 75 /* free gem object. */ 76 void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj); 77 78 /* create memory region for drm framebuffer. */ 79 int exynos_drm_gem_dumb_create(struct drm_file *file_priv, 80 struct drm_device *dev, struct drm_mode_create_dumb *args); 81 82 /* map memory region for drm framebuffer to user space. */ 83 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 84 struct drm_device *dev, uint32_t handle, uint64_t *offset); 85 86 /* page fault handler and mmap fault address(virtual) to physical memory. */ 87 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); 88 89 /* 90 * mmap the physically continuous memory that a gem object contains 91 * to user space. 92 */ 93 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data, 94 struct drm_file *file_priv); 95 96 /* set vm_flags and we can change the vm attribute to other one at here. */ 97 int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 98 99 /* 100 * destroy memory region allocated. 101 * - a gem handle and physical memory region pointed by a gem object 102 * would be released by drm_gem_handle_delete(). 103 */ 104 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv, 105 struct drm_device *dev, unsigned int handle); 106 107 #endif 108