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1 | /* SPDX-License-Identifier: GPL-2.0 */ | |
2 | #ifndef __DRM_GEM_CMA_HELPER_H__ | |
3 | #define __DRM_GEM_CMA_HELPER_H__ | |
4 | ||
5 | #include <drm/drmP.h> | |
6 | #include <drm/drm_gem.h> | |
7 | ||
8 | /** | |
9 | * struct drm_gem_cma_object - GEM object backed by CMA memory allocations | |
10 | * @base: base GEM object | |
11 | * @paddr: physical address of the backing memory | |
12 | * @sgt: scatter/gather table for imported PRIME buffers | |
13 | * @vaddr: kernel virtual address of the backing memory | |
14 | */ | |
15 | struct drm_gem_cma_object { | |
16 | struct drm_gem_object base; | |
17 | dma_addr_t paddr; | |
18 | struct sg_table *sgt; | |
19 | ||
20 | /* For objects with DMA memory allocated by GEM CMA */ | |
21 | void *vaddr; | |
22 | }; | |
23 | ||
24 | static inline struct drm_gem_cma_object * | |
25 | to_drm_gem_cma_obj(struct drm_gem_object *gem_obj) | |
26 | { | |
27 | return container_of(gem_obj, struct drm_gem_cma_object, base); | |
28 | } | |
29 | ||
30 | #ifndef CONFIG_MMU | |
31 | #define DRM_GEM_CMA_UNMAPPED_AREA_FOPS \ | |
32 | .get_unmapped_area = drm_gem_cma_get_unmapped_area, | |
33 | #else | |
34 | #define DRM_GEM_CMA_UNMAPPED_AREA_FOPS | |
35 | #endif | |
36 | ||
37 | /** | |
38 | * DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers | |
39 | * @name: name for the generated structure | |
40 | * | |
41 | * This macro autogenerates a suitable &struct file_operations for CMA based | |
42 | * drivers, which can be assigned to &drm_driver.fops. Note that this structure | |
43 | * cannot be shared between drivers, because it contains a reference to the | |
44 | * current module using THIS_MODULE. | |
45 | * | |
46 | * Note that the declaration is already marked as static - if you need a | |
47 | * non-static version of this you're probably doing it wrong and will break the | |
48 | * THIS_MODULE reference by accident. | |
49 | */ | |
50 | #define DEFINE_DRM_GEM_CMA_FOPS(name) \ | |
51 | static const struct file_operations name = {\ | |
52 | .owner = THIS_MODULE,\ | |
53 | .open = drm_open,\ | |
54 | .release = drm_release,\ | |
55 | .unlocked_ioctl = drm_ioctl,\ | |
56 | .compat_ioctl = drm_compat_ioctl,\ | |
57 | .poll = drm_poll,\ | |
58 | .read = drm_read,\ | |
59 | .llseek = noop_llseek,\ | |
60 | .mmap = drm_gem_cma_mmap,\ | |
61 | DRM_GEM_CMA_UNMAPPED_AREA_FOPS \ | |
62 | } | |
63 | ||
64 | /* free GEM object */ | |
65 | void drm_gem_cma_free_object(struct drm_gem_object *gem_obj); | |
66 | ||
67 | /* create memory region for DRM framebuffer */ | |
68 | int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv, | |
69 | struct drm_device *drm, | |
70 | struct drm_mode_create_dumb *args); | |
71 | ||
72 | /* create memory region for DRM framebuffer */ | |
73 | int drm_gem_cma_dumb_create(struct drm_file *file_priv, | |
74 | struct drm_device *drm, | |
75 | struct drm_mode_create_dumb *args); | |
76 | ||
77 | /* set vm_flags and we can change the VM attribute to other one at here */ | |
78 | int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma); | |
79 | ||
80 | /* allocate physical memory */ | |
81 | struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm, | |
82 | size_t size); | |
83 | ||
84 | extern const struct vm_operations_struct drm_gem_cma_vm_ops; | |
85 | ||
86 | #ifndef CONFIG_MMU | |
87 | unsigned long drm_gem_cma_get_unmapped_area(struct file *filp, | |
88 | unsigned long addr, | |
89 | unsigned long len, | |
90 | unsigned long pgoff, | |
91 | unsigned long flags); | |
92 | #endif | |
93 | ||
94 | #ifdef CONFIG_DEBUG_FS | |
95 | void drm_gem_cma_describe(struct drm_gem_cma_object *obj, struct seq_file *m); | |
96 | #endif | |
97 | ||
98 | struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj); | |
99 | struct drm_gem_object * | |
100 | drm_gem_cma_prime_import_sg_table(struct drm_device *dev, | |
101 | struct dma_buf_attachment *attach, | |
102 | struct sg_table *sgt); | |
103 | int drm_gem_cma_prime_mmap(struct drm_gem_object *obj, | |
104 | struct vm_area_struct *vma); | |
105 | void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj); | |
106 | void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr); | |
107 | ||
108 | #endif /* __DRM_GEM_CMA_HELPER_H__ */ |