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
 49enum bochs_types {
 50	BOCHS_QEMU_STDVGA,
 51	BOCHS_UNKNOWN,
 52};
 53
 54struct bochs_framebuffer {
 55	struct drm_framebuffer base;
 56	struct drm_gem_object *obj;
 57};
 58
 59struct 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
100struct 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
109static inline struct bochs_bo *bochs_bo(struct ttm_buffer_object *bo)
110{
111	return container_of(bo, struct bochs_bo, bo);
112}
113
114static 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
121static 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 */
129int bochs_hw_init(struct drm_device *dev, uint32_t flags);
130void bochs_hw_fini(struct drm_device *dev);
131
132void bochs_hw_setmode(struct bochs_device *bochs,
133		      struct drm_display_mode *mode);
134void bochs_hw_setbase(struct bochs_device *bochs,
135		      int x, int y, u64 addr);
136
137/* bochs_mm.c */
138int bochs_mm_init(struct bochs_device *bochs);
139void bochs_mm_fini(struct bochs_device *bochs);
140int bochs_mmap(struct file *filp, struct vm_area_struct *vma);
141
142int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
143		     struct drm_gem_object **obj);
144int bochs_gem_init_object(struct drm_gem_object *obj);
145void bochs_gem_free_object(struct drm_gem_object *obj);
146int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
147		      struct drm_mode_create_dumb *args);
148int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
149			   uint32_t handle, uint64_t *offset);
150
151int 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);
155int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr);
156int bochs_bo_unpin(struct bochs_bo *bo);
157
158extern const struct drm_mode_config_funcs bochs_mode_funcs;
159
160/* bochs_kms.c */
161int bochs_kms_init(struct bochs_device *bochs);
162void bochs_kms_fini(struct bochs_device *bochs);
163
164/* bochs_fbdev.c */
165int bochs_fbdev_init(struct bochs_device *bochs);
166void bochs_fbdev_fini(struct bochs_device *bochs);