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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/drm_file.h>
6#include <drm/drm_ioctl.h>
7#include <drm/drm_gem.h>
8
9struct drm_mode_create_dumb;
10
11/**
12 * struct drm_gem_cma_object - GEM object backed by CMA memory allocations
13 * @base: base GEM object
14 * @paddr: physical address of the backing memory
15 * @sgt: scatter/gather table for imported PRIME buffers. The table can have
16 * more than one entry but they are guaranteed to have contiguous
17 * DMA addresses.
18 * @vaddr: kernel virtual address of the backing memory
19 */
20struct drm_gem_cma_object {
21 struct drm_gem_object base;
22 dma_addr_t paddr;
23 struct sg_table *sgt;
24
25 /* For objects with DMA memory allocated by GEM CMA */
26 void *vaddr;
27};
28
29#define to_drm_gem_cma_obj(gem_obj) \
30 container_of(gem_obj, struct drm_gem_cma_object, base)
31
32#ifndef CONFIG_MMU
33#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
34 .get_unmapped_area = drm_gem_cma_get_unmapped_area,
35#else
36#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS
37#endif
38
39/**
40 * DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers
41 * @name: name for the generated structure
42 *
43 * This macro autogenerates a suitable &struct file_operations for CMA based
44 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
45 * cannot be shared between drivers, because it contains a reference to the
46 * current module using THIS_MODULE.
47 *
48 * Note that the declaration is already marked as static - if you need a
49 * non-static version of this you're probably doing it wrong and will break the
50 * THIS_MODULE reference by accident.
51 */
52#define DEFINE_DRM_GEM_CMA_FOPS(name) \
53 static const struct file_operations name = {\
54 .owner = THIS_MODULE,\
55 .open = drm_open,\
56 .release = drm_release,\
57 .unlocked_ioctl = drm_ioctl,\
58 .compat_ioctl = drm_compat_ioctl,\
59 .poll = drm_poll,\
60 .read = drm_read,\
61 .llseek = noop_llseek,\
62 .mmap = drm_gem_cma_mmap,\
63 DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
64 }
65
66/* free GEM object */
67void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
68
69/* create memory region for DRM framebuffer */
70int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
71 struct drm_device *drm,
72 struct drm_mode_create_dumb *args);
73
74/* create memory region for DRM framebuffer */
75int drm_gem_cma_dumb_create(struct drm_file *file_priv,
76 struct drm_device *drm,
77 struct drm_mode_create_dumb *args);
78
79/* set vm_flags and we can change the VM attribute to other one at here */
80int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
81
82/* allocate physical memory */
83struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
84 size_t size);
85
86extern const struct vm_operations_struct drm_gem_cma_vm_ops;
87
88#ifndef CONFIG_MMU
89unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
90 unsigned long addr,
91 unsigned long len,
92 unsigned long pgoff,
93 unsigned long flags);
94#endif
95
96void drm_gem_cma_print_info(struct drm_printer *p, unsigned int indent,
97 const struct drm_gem_object *obj);
98
99struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
100struct drm_gem_object *
101drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
102 struct dma_buf_attachment *attach,
103 struct sg_table *sgt);
104int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
105 struct vm_area_struct *vma);
106void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
107void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
108
109struct drm_gem_object *
110drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size);
111
112/**
113 * DRM_GEM_CMA_VMAP_DRIVER_OPS - CMA GEM driver operations ensuring a virtual
114 * address on the buffer
115 *
116 * This macro provides a shortcut for setting the default GEM operations in the
117 * &drm_driver structure for drivers that need the virtual address also on
118 * imported buffers.
119 */
120#define DRM_GEM_CMA_VMAP_DRIVER_OPS \
121 .gem_create_object = drm_cma_gem_create_object_default_funcs, \
122 .dumb_create = drm_gem_cma_dumb_create, \
123 .prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
124 .prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
125 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table_vmap, \
126 .gem_prime_mmap = drm_gem_prime_mmap
127
128struct drm_gem_object *
129drm_gem_cma_prime_import_sg_table_vmap(struct drm_device *drm,
130 struct dma_buf_attachment *attach,
131 struct sg_table *sgt);
132
133#endif /* __DRM_GEM_CMA_HELPER_H__ */
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. The table can have
13 * more than one entry but they are guaranteed to have contiguous
14 * DMA addresses.
15 * @vaddr: kernel virtual address of the backing memory
16 */
17struct drm_gem_cma_object {
18 struct drm_gem_object base;
19 dma_addr_t paddr;
20 struct sg_table *sgt;
21
22 /* For objects with DMA memory allocated by GEM CMA */
23 void *vaddr;
24};
25
26#define to_drm_gem_cma_obj(gem_obj) \
27 container_of(gem_obj, struct drm_gem_cma_object, base)
28
29#ifndef CONFIG_MMU
30#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
31 .get_unmapped_area = drm_gem_cma_get_unmapped_area,
32#else
33#define DRM_GEM_CMA_UNMAPPED_AREA_FOPS
34#endif
35
36/**
37 * DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers
38 * @name: name for the generated structure
39 *
40 * This macro autogenerates a suitable &struct file_operations for CMA based
41 * drivers, which can be assigned to &drm_driver.fops. Note that this structure
42 * cannot be shared between drivers, because it contains a reference to the
43 * current module using THIS_MODULE.
44 *
45 * Note that the declaration is already marked as static - if you need a
46 * non-static version of this you're probably doing it wrong and will break the
47 * THIS_MODULE reference by accident.
48 */
49#define DEFINE_DRM_GEM_CMA_FOPS(name) \
50 static const struct file_operations name = {\
51 .owner = THIS_MODULE,\
52 .open = drm_open,\
53 .release = drm_release,\
54 .unlocked_ioctl = drm_ioctl,\
55 .compat_ioctl = drm_compat_ioctl,\
56 .poll = drm_poll,\
57 .read = drm_read,\
58 .llseek = noop_llseek,\
59 .mmap = drm_gem_cma_mmap,\
60 DRM_GEM_CMA_UNMAPPED_AREA_FOPS \
61 }
62
63/* free GEM object */
64void drm_gem_cma_free_object(struct drm_gem_object *gem_obj);
65
66/* create memory region for DRM framebuffer */
67int drm_gem_cma_dumb_create_internal(struct drm_file *file_priv,
68 struct drm_device *drm,
69 struct drm_mode_create_dumb *args);
70
71/* create memory region for DRM framebuffer */
72int drm_gem_cma_dumb_create(struct drm_file *file_priv,
73 struct drm_device *drm,
74 struct drm_mode_create_dumb *args);
75
76/* set vm_flags and we can change the VM attribute to other one at here */
77int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma);
78
79/* allocate physical memory */
80struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
81 size_t size);
82
83extern const struct vm_operations_struct drm_gem_cma_vm_ops;
84
85#ifndef CONFIG_MMU
86unsigned long drm_gem_cma_get_unmapped_area(struct file *filp,
87 unsigned long addr,
88 unsigned long len,
89 unsigned long pgoff,
90 unsigned long flags);
91#endif
92
93void drm_gem_cma_print_info(struct drm_printer *p, unsigned int indent,
94 const struct drm_gem_object *obj);
95
96struct sg_table *drm_gem_cma_prime_get_sg_table(struct drm_gem_object *obj);
97struct drm_gem_object *
98drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
99 struct dma_buf_attachment *attach,
100 struct sg_table *sgt);
101int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
102 struct vm_area_struct *vma);
103void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
104void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
105
106#endif /* __DRM_GEM_CMA_HELPER_H__ */