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1 #include <linux/io.h>
2 #include <linux/fb.h>
3 #include <linux/console.h>
4 
5 #include <drm/drmP.h>
6 #include <drm/drm_crtc.h>
7 #include <drm/drm_crtc_helper.h>
8 #include <drm/drm_fb_helper.h>
9 
10 #include <drm/drm_gem.h>
11 
12 #include <ttm/ttm_bo_driver.h>
13 #include <ttm/ttm_page_alloc.h>
14 
15 /* ---------------------------------------------------------------------- */
16 
17 #define VBE_DISPI_IOPORT_INDEX           0x01CE
18 #define VBE_DISPI_IOPORT_DATA            0x01CF
19 
20 #define VBE_DISPI_INDEX_ID               0x0
21 #define VBE_DISPI_INDEX_XRES             0x1
22 #define VBE_DISPI_INDEX_YRES             0x2
23 #define VBE_DISPI_INDEX_BPP              0x3
24 #define VBE_DISPI_INDEX_ENABLE           0x4
25 #define VBE_DISPI_INDEX_BANK             0x5
26 #define VBE_DISPI_INDEX_VIRT_WIDTH       0x6
27 #define VBE_DISPI_INDEX_VIRT_HEIGHT      0x7
28 #define VBE_DISPI_INDEX_X_OFFSET         0x8
29 #define VBE_DISPI_INDEX_Y_OFFSET         0x9
30 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
31 
32 #define VBE_DISPI_ID0                    0xB0C0
33 #define VBE_DISPI_ID1                    0xB0C1
34 #define VBE_DISPI_ID2                    0xB0C2
35 #define VBE_DISPI_ID3                    0xB0C3
36 #define VBE_DISPI_ID4                    0xB0C4
37 #define VBE_DISPI_ID5                    0xB0C5
38 
39 #define VBE_DISPI_DISABLED               0x00
40 #define VBE_DISPI_ENABLED                0x01
41 #define VBE_DISPI_GETCAPS                0x02
42 #define VBE_DISPI_8BIT_DAC               0x20
43 #define VBE_DISPI_LFB_ENABLED            0x40
44 #define VBE_DISPI_NOCLEARMEM             0x80
45 
46 /* ---------------------------------------------------------------------- */
47 
48 enum bochs_types {
49 	BOCHS_QEMU_STDVGA,
50 	BOCHS_UNKNOWN,
51 };
52 
53 struct bochs_framebuffer {
54 	struct drm_framebuffer base;
55 	struct drm_gem_object *obj;
56 };
57 
58 struct bochs_device {
59 	/* hw */
60 	void __iomem   *mmio;
61 	int            ioports;
62 	void __iomem   *fb_map;
63 	unsigned long  fb_base;
64 	unsigned long  fb_size;
65 
66 	/* mode */
67 	u16 xres;
68 	u16 yres;
69 	u16 yres_virtual;
70 	u32 stride;
71 	u32 bpp;
72 
73 	/* drm */
74 	struct drm_device  *dev;
75 	struct drm_crtc crtc;
76 	struct drm_encoder encoder;
77 	struct drm_connector connector;
78 	bool mode_config_initialized;
79 
80 	/* ttm */
81 	struct {
82 		struct drm_global_reference mem_global_ref;
83 		struct ttm_bo_global_ref bo_global_ref;
84 		struct ttm_bo_device bdev;
85 		bool initialized;
86 	} ttm;
87 
88 	/* fbdev */
89 	struct {
90 		struct bochs_framebuffer gfb;
91 		struct drm_fb_helper helper;
92 		int size;
93 		bool initialized;
94 	} fb;
95 };
96 
97 #define to_bochs_framebuffer(x) container_of(x, struct bochs_framebuffer, base)
98 
99 struct bochs_bo {
100 	struct ttm_buffer_object bo;
101 	struct ttm_placement placement;
102 	struct ttm_bo_kmap_obj kmap;
103 	struct drm_gem_object gem;
104 	struct ttm_place placements[3];
105 	int pin_count;
106 };
107 
bochs_bo(struct ttm_buffer_object * bo)108 static inline struct bochs_bo *bochs_bo(struct ttm_buffer_object *bo)
109 {
110 	return container_of(bo, struct bochs_bo, bo);
111 }
112 
gem_to_bochs_bo(struct drm_gem_object * gem)113 static inline struct bochs_bo *gem_to_bochs_bo(struct drm_gem_object *gem)
114 {
115 	return container_of(gem, struct bochs_bo, gem);
116 }
117 
118 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
119 
bochs_bo_mmap_offset(struct bochs_bo * bo)120 static inline u64 bochs_bo_mmap_offset(struct bochs_bo *bo)
121 {
122 	return drm_vma_node_offset_addr(&bo->bo.vma_node);
123 }
124 
125 /* ---------------------------------------------------------------------- */
126 
127 /* bochs_hw.c */
128 int bochs_hw_init(struct drm_device *dev, uint32_t flags);
129 void bochs_hw_fini(struct drm_device *dev);
130 
131 void bochs_hw_setmode(struct bochs_device *bochs,
132 		      struct drm_display_mode *mode);
133 void bochs_hw_setbase(struct bochs_device *bochs,
134 		      int x, int y, u64 addr);
135 
136 /* bochs_mm.c */
137 int bochs_mm_init(struct bochs_device *bochs);
138 void bochs_mm_fini(struct bochs_device *bochs);
139 int bochs_mmap(struct file *filp, struct vm_area_struct *vma);
140 
141 int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
142 		     struct drm_gem_object **obj);
143 int bochs_gem_init_object(struct drm_gem_object *obj);
144 void bochs_gem_free_object(struct drm_gem_object *obj);
145 int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
146 		      struct drm_mode_create_dumb *args);
147 int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
148 			   uint32_t handle, uint64_t *offset);
149 
150 int bochs_framebuffer_init(struct drm_device *dev,
151 			   struct bochs_framebuffer *gfb,
152 			   struct drm_mode_fb_cmd2 *mode_cmd,
153 			   struct drm_gem_object *obj);
154 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr);
155 int bochs_bo_unpin(struct bochs_bo *bo);
156 
157 extern const struct drm_mode_config_funcs bochs_mode_funcs;
158 
159 /* bochs_kms.c */
160 int bochs_kms_init(struct bochs_device *bochs);
161 void bochs_kms_fini(struct bochs_device *bochs);
162 
163 /* bochs_fbdev.c */
164 int bochs_fbdev_init(struct bochs_device *bochs);
165 void bochs_fbdev_fini(struct bochs_device *bochs);
166