1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Hisilicon Hibmc SoC drm driver
3  *
4  * Based on the bochs drm driver.
5  *
6  * Copyright (c) 2016 Huawei Limited.
7  *
8  * Author:
9  *	Rongrong Zou <zourongrong@huawei.com>
10  *	Rongrong Zou <zourongrong@gmail.com>
11  *	Jianhua Li <lijianhua@huawei.com>
12  */
13 
14 #ifndef HIBMC_DRM_DRV_H
15 #define HIBMC_DRM_DRV_H
16 
17 #include <drm/drmP.h>
18 #include <drm/drm_atomic.h>
19 #include <drm/drm_fb_helper.h>
20 #include <drm/drm_gem.h>
21 #include <drm/ttm/ttm_bo_driver.h>
22 
23 struct hibmc_framebuffer {
24 	struct drm_framebuffer fb;
25 	struct drm_gem_object *obj;
26 };
27 
28 struct hibmc_fbdev {
29 	struct drm_fb_helper helper; /* must be first */
30 	struct hibmc_framebuffer *fb;
31 	int size;
32 };
33 
34 struct hibmc_drm_private {
35 	/* hw */
36 	void __iomem   *mmio;
37 	void __iomem   *fb_map;
38 	unsigned long  fb_base;
39 	unsigned long  fb_size;
40 	bool msi_enabled;
41 
42 	/* drm */
43 	struct drm_device  *dev;
44 	bool mode_config_initialized;
45 
46 	/* ttm */
47 	struct ttm_bo_device bdev;
48 	bool initialized;
49 
50 	/* fbdev */
51 	struct hibmc_fbdev *fbdev;
52 	bool mm_inited;
53 };
54 
55 #define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
56 
57 struct hibmc_bo {
58 	struct ttm_buffer_object bo;
59 	struct ttm_placement placement;
60 	struct ttm_bo_kmap_obj kmap;
61 	struct drm_gem_object gem;
62 	struct ttm_place placements[3];
63 	int pin_count;
64 };
65 
66 static inline struct hibmc_bo *hibmc_bo(struct ttm_buffer_object *bo)
67 {
68 	return container_of(bo, struct hibmc_bo, bo);
69 }
70 
71 static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
72 {
73 	return container_of(gem, struct hibmc_bo, gem);
74 }
75 
76 void hibmc_set_power_mode(struct hibmc_drm_private *priv,
77 			  unsigned int power_mode);
78 void hibmc_set_current_gate(struct hibmc_drm_private *priv,
79 			    unsigned int gate);
80 
81 int hibmc_de_init(struct hibmc_drm_private *priv);
82 int hibmc_vdac_init(struct hibmc_drm_private *priv);
83 int hibmc_fbdev_init(struct hibmc_drm_private *priv);
84 void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
85 
86 int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
87 		     struct drm_gem_object **obj);
88 struct hibmc_framebuffer *
89 hibmc_framebuffer_init(struct drm_device *dev,
90 		       const struct drm_mode_fb_cmd2 *mode_cmd,
91 		       struct drm_gem_object *obj);
92 
93 int hibmc_mm_init(struct hibmc_drm_private *hibmc);
94 void hibmc_mm_fini(struct hibmc_drm_private *hibmc);
95 int hibmc_bo_pin(struct hibmc_bo *bo, u32 pl_flag, u64 *gpu_addr);
96 int hibmc_bo_unpin(struct hibmc_bo *bo);
97 void hibmc_gem_free_object(struct drm_gem_object *obj);
98 int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
99 		      struct drm_mode_create_dumb *args);
100 int hibmc_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
101 			   u32 handle, u64 *offset);
102 int hibmc_mmap(struct file *filp, struct vm_area_struct *vma);
103 
104 extern const struct drm_mode_config_funcs hibmc_mode_funcs;
105 
106 #endif
107