1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/io.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_encoder.h>
9 #include <drm/drm_fb_helper.h>
10
11 #include <drm/drm_gem.h>
12
13 #include <drm/ttm/ttm_bo_driver.h>
14 #include <drm/ttm/ttm_page_alloc.h>
15
16 /* ---------------------------------------------------------------------- */
17
18 #define VBE_DISPI_IOPORT_INDEX 0x01CE
19 #define VBE_DISPI_IOPORT_DATA 0x01CF
20
21 #define VBE_DISPI_INDEX_ID 0x0
22 #define VBE_DISPI_INDEX_XRES 0x1
23 #define VBE_DISPI_INDEX_YRES 0x2
24 #define VBE_DISPI_INDEX_BPP 0x3
25 #define VBE_DISPI_INDEX_ENABLE 0x4
26 #define VBE_DISPI_INDEX_BANK 0x5
27 #define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
28 #define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
29 #define VBE_DISPI_INDEX_X_OFFSET 0x8
30 #define VBE_DISPI_INDEX_Y_OFFSET 0x9
31 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
32
33 #define VBE_DISPI_ID0 0xB0C0
34 #define VBE_DISPI_ID1 0xB0C1
35 #define VBE_DISPI_ID2 0xB0C2
36 #define VBE_DISPI_ID3 0xB0C3
37 #define VBE_DISPI_ID4 0xB0C4
38 #define VBE_DISPI_ID5 0xB0C5
39
40 #define VBE_DISPI_DISABLED 0x00
41 #define VBE_DISPI_ENABLED 0x01
42 #define VBE_DISPI_GETCAPS 0x02
43 #define VBE_DISPI_8BIT_DAC 0x20
44 #define VBE_DISPI_LFB_ENABLED 0x40
45 #define VBE_DISPI_NOCLEARMEM 0x80
46
47 /* ---------------------------------------------------------------------- */
48
49 enum bochs_types {
50 BOCHS_QEMU_STDVGA,
51 BOCHS_UNKNOWN,
52 };
53
54 struct bochs_framebuffer {
55 struct drm_framebuffer base;
56 struct drm_gem_object *obj;
57 };
58
59 struct bochs_device {
60 /* hw */
61 void __iomem *mmio;
62 int ioports;
63 void __iomem *fb_map;
64 unsigned long fb_base;
65 unsigned long fb_size;
66
67 /* mode */
68 u16 xres;
69 u16 yres;
70 u16 yres_virtual;
71 u32 stride;
72 u32 bpp;
73
74 /* drm */
75 struct drm_device *dev;
76 struct drm_crtc crtc;
77 struct drm_encoder encoder;
78 struct drm_connector connector;
79 bool mode_config_initialized;
80
81 /* ttm */
82 struct {
83 struct drm_global_reference mem_global_ref;
84 struct ttm_bo_global_ref bo_global_ref;
85 struct ttm_bo_device bdev;
86 bool initialized;
87 } ttm;
88
89 /* fbdev */
90 struct {
91 struct bochs_framebuffer gfb;
92 struct drm_fb_helper helper;
93 int size;
94 bool initialized;
95 } fb;
96 };
97
98 #define to_bochs_framebuffer(x) container_of(x, struct bochs_framebuffer, base)
99
100 struct bochs_bo {
101 struct ttm_buffer_object bo;
102 struct ttm_placement placement;
103 struct ttm_bo_kmap_obj kmap;
104 struct drm_gem_object gem;
105 struct ttm_place placements[3];
106 int pin_count;
107 };
108
bochs_bo(struct ttm_buffer_object * bo)109 static inline struct bochs_bo *bochs_bo(struct ttm_buffer_object *bo)
110 {
111 return container_of(bo, struct bochs_bo, bo);
112 }
113
gem_to_bochs_bo(struct drm_gem_object * gem)114 static inline struct bochs_bo *gem_to_bochs_bo(struct drm_gem_object *gem)
115 {
116 return container_of(gem, struct bochs_bo, gem);
117 }
118
119 #define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
120
bochs_bo_mmap_offset(struct bochs_bo * bo)121 static inline u64 bochs_bo_mmap_offset(struct bochs_bo *bo)
122 {
123 return drm_vma_node_offset_addr(&bo->bo.vma_node);
124 }
125
126 /* ---------------------------------------------------------------------- */
127
128 /* bochs_hw.c */
129 int bochs_hw_init(struct drm_device *dev, uint32_t flags);
130 void bochs_hw_fini(struct drm_device *dev);
131
132 void bochs_hw_setmode(struct bochs_device *bochs,
133 struct drm_display_mode *mode);
134 void bochs_hw_setbase(struct bochs_device *bochs,
135 int x, int y, u64 addr);
136
137 /* bochs_mm.c */
138 int bochs_mm_init(struct bochs_device *bochs);
139 void bochs_mm_fini(struct bochs_device *bochs);
140 int bochs_mmap(struct file *filp, struct vm_area_struct *vma);
141
142 int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
143 struct drm_gem_object **obj);
144 int bochs_gem_init_object(struct drm_gem_object *obj);
145 void bochs_gem_free_object(struct drm_gem_object *obj);
146 int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
147 struct drm_mode_create_dumb *args);
148 int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
149 uint32_t handle, uint64_t *offset);
150
151 int bochs_framebuffer_init(struct drm_device *dev,
152 struct bochs_framebuffer *gfb,
153 const struct drm_mode_fb_cmd2 *mode_cmd,
154 struct drm_gem_object *obj);
155 int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr);
156 int bochs_bo_unpin(struct bochs_bo *bo);
157
158 extern const struct drm_mode_config_funcs bochs_mode_funcs;
159
160 /* bochs_kms.c */
161 int bochs_kms_init(struct bochs_device *bochs);
162 void bochs_kms_fini(struct bochs_device *bochs);
163
164 /* bochs_fbdev.c */
165 int bochs_fbdev_init(struct bochs_device *bochs);
166 void bochs_fbdev_fini(struct bochs_device *bochs);
167
