projects / deliverable / linux.git / blame
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|---|---|---|
| 1c248b7d ID |
1 | /* exynos_drm_gem.h |
| 2 | * | |
| 3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. | |
| 4 | * Authoer: Inki Dae <inki.dae@samsung.com> | |
| 5 | * | |
| d81aecb5 ID |
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. | |
| 1c248b7d ID |
10 | */ |
| 11 | ||
| 12 | #ifndef _EXYNOS_DRM_GEM_H_ | |
| 13 | #define _EXYNOS_DRM_GEM_H_ | |
| 14 | ||
| d9fc9413 DV |
15 | #include <drm/drm_gem.h> |
| 16 | ||
| 1c248b7d ID |
17 | #define to_exynos_gem_obj(x) container_of(x,\ |
| 18 | struct exynos_drm_gem_obj, base) | |
| 19 | ||
| dcf9af82 ID |
20 | #define IS_NONCONTIG_BUFFER(f) (f & EXYNOS_BO_NONCONTIG) |
| 21 | ||
| 1c248b7d ID |
22 | /* |
| 23 | * exynos drm buffer structure. | |
| 24 | * | |
| 25 | * @base: a gem object. | |
| 26 | * - a new handle to this gem object would be created | |
| 27 | * by drm_gem_handle_create(). | |
| 2c871127 ID |
28 | * @buffer: a pointer to exynos_drm_gem_buffer object. |
| 29 | * - contain the information to memory region allocated | |
| 30 | * by user request or at framebuffer creation. | |
| 1c248b7d ID |
31 | * continuous memory region allocated by user request |
| 32 | * or at framebuffer creation. | |
| 2a8cb489 | 33 | * @flags: indicate memory type to allocated buffer and cache attruibute. |
| 3c52b880 ID |
34 | * @size: size requested from user, in bytes and this size is aligned |
| 35 | * in page unit. | |
| 2a8cb489 JS |
36 | * @cookie: cookie returned by dma_alloc_attrs |
| 37 | * @kvaddr: kernel virtual address to allocated memory region. | |
| 38 | * @dma_addr: bus address(accessed by dma) to allocated memory region. | |
| 39 | * - this address could be physical address without IOMMU and | |
| 40 | * device address with IOMMU. | |
| 41 | * @pages: Array of backing pages. | |
| 7c93537a | 42 | * @sgt: Imported sg_table. |
| 1c248b7d | 43 | * |
| c6b78bc8 | 44 | * P.S. this object would be transferred to user as kms_bo.handle so |
| 1c248b7d ID |
45 | * user can access the buffer through kms_bo.handle. |
| 46 | */ | |
| 47 | struct exynos_drm_gem_obj { | |
| 2a8cb489 JS |
48 | struct drm_gem_object base; |
| 49 | unsigned int flags; | |
| 50 | unsigned long size; | |
| 51 | void *cookie; | |
| 52 | void __iomem *kvaddr; | |
| 53 | dma_addr_t dma_addr; | |
| 54 | struct dma_attrs dma_attrs; | |
| 55 | struct page **pages; | |
| 7c93537a | 56 | struct sg_table *sgt; |
| 1c248b7d ID |
57 | }; |
| 58 | ||
| b2df26c1 ID |
59 | struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask); |
| 60 | ||
| 2364839a JS |
61 | /* destroy a buffer with gem object */ |
| 62 | void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj); | |
| 63 | ||
| 64 | /* create a new buffer with gem object */ | |
| f088d5a9 | 65 | struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev, |
| 2b35892e ID |
66 | unsigned int flags, |
| 67 | unsigned long size); | |
| 1c248b7d ID |
68 | |
| 69 | /* | |
| 70 | * request gem object creation and buffer allocation as the size | |
| 71 | * that it is calculated with framebuffer information such as width, | |
| 72 | * height and bpp. | |
| 73 | */ | |
| 74 | int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data, | |
| ee5e770e | 75 | struct drm_file *file_priv); |
| 1c248b7d | 76 | |
| f0b1bda7 ID |
77 | /* |
| 78 | * get dma address from gem handle and this function could be used for | |
| 79 | * other drivers such as 2d/3d acceleration drivers. | |
| 80 | * with this function call, gem object reference count would be increased. | |
| 81 | */ | |
| d87342c1 | 82 | dma_addr_t *exynos_drm_gem_get_dma_addr(struct drm_device *dev, |
| f0b1bda7 | 83 | unsigned int gem_handle, |
| d87342c1 | 84 | struct drm_file *filp); |
| f0b1bda7 ID |
85 | |
| 86 | /* | |
| 87 | * put dma address from gem handle and this function could be used for | |
| 88 | * other drivers such as 2d/3d acceleration drivers. | |
| 89 | * with this function call, gem object reference count would be decreased. | |
| 90 | */ | |
| 91 | void exynos_drm_gem_put_dma_addr(struct drm_device *dev, | |
| 92 | unsigned int gem_handle, | |
| d87342c1 | 93 | struct drm_file *filp); |
| f0b1bda7 | 94 | |
| 2a3098ff ID |
95 | /* map user space allocated by malloc to pages. */ |
| 96 | int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data, | |
| 97 | struct drm_file *file_priv); | |
| 98 | ||
| 40cd7e0c ID |
99 | /* get buffer information to memory region allocated by gem. */ |
| 100 | int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data, | |
| 101 | struct drm_file *file_priv); | |
| 102 | ||
| a4f19aaa ID |
103 | /* get buffer size to gem handle. */ |
| 104 | unsigned long exynos_drm_gem_get_size(struct drm_device *dev, | |
| 105 | unsigned int gem_handle, | |
| 106 | struct drm_file *file_priv); | |
| 107 | ||
| 1c248b7d ID |
108 | /* free gem object. */ |
| 109 | void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj); | |
| 110 | ||
| 111 | /* create memory region for drm framebuffer. */ | |
| 112 | int exynos_drm_gem_dumb_create(struct drm_file *file_priv, | |
| ee5e770e JS |
113 | struct drm_device *dev, |
| 114 | struct drm_mode_create_dumb *args); | |
| 1c248b7d ID |
115 | |
| 116 | /* map memory region for drm framebuffer to user space. */ | |
| 117 | int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, | |
| ee5e770e JS |
118 | struct drm_device *dev, uint32_t handle, |
| 119 | uint64_t *offset); | |
| 1c248b7d | 120 | |
| ee5e770e JS |
121 | /* page fault handler and mmap fault address(virtual) to physical memory. */ |
| 122 | int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); | |
| 123 | ||
| 124 | /* set vm_flags and we can change the vm attribute to other one at here. */ | |
| 125 | int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); | |
| 1c248b7d | 126 | |
| 2a3098ff ID |
127 | static inline int vma_is_io(struct vm_area_struct *vma) |
| 128 | { | |
| 129 | return !!(vma->vm_flags & (VM_IO | VM_PFNMAP)); | |
| 130 | } | |
| 131 | ||
| 132 | /* get a copy of a virtual memory region. */ | |
| 133 | struct vm_area_struct *exynos_gem_get_vma(struct vm_area_struct *vma); | |
| 134 | ||
| 135 | /* release a userspace virtual memory area. */ | |
| 136 | void exynos_gem_put_vma(struct vm_area_struct *vma); | |
| 137 | ||
| 138 | /* get pages from user space. */ | |
| 139 | int exynos_gem_get_pages_from_userptr(unsigned long start, | |
| 140 | unsigned int npages, | |
| 141 | struct page **pages, | |
| 142 | struct vm_area_struct *vma); | |
| 143 | ||
| 144 | /* drop the reference to pages. */ | |
| 145 | void exynos_gem_put_pages_to_userptr(struct page **pages, | |
| 146 | unsigned int npages, | |
| 147 | struct vm_area_struct *vma); | |
| 148 | ||
| 149 | /* map sgt with dma region. */ | |
| 150 | int exynos_gem_map_sgt_with_dma(struct drm_device *drm_dev, | |
| 151 | struct sg_table *sgt, | |
| 152 | enum dma_data_direction dir); | |
| 153 | ||
| 154 | /* unmap sgt from dma region. */ | |
| 155 | void exynos_gem_unmap_sgt_from_dma(struct drm_device *drm_dev, | |
| 156 | struct sg_table *sgt, | |
| 157 | enum dma_data_direction dir); | |
| 158 | ||
| 01ed50dd JS |
159 | /* low-level interface prime helpers */ |
| 160 | struct sg_table *exynos_drm_gem_prime_get_sg_table(struct drm_gem_object *obj); | |
| 161 | struct drm_gem_object * | |
| 162 | exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, | |
| 163 | struct dma_buf_attachment *attach, | |
| 164 | struct sg_table *sgt); | |
| 165 | void *exynos_drm_gem_prime_vmap(struct drm_gem_object *obj); | |
| 166 | void exynos_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); | |
| 167 | ||
| 1c248b7d | 168 | #endif |