drivers/gpu/drm/vboxvideo/vbox_drv.h

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/vboxvideo/vbox_drv.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/vboxvideo/vbox_drv.h
Extension
.h
Size
4708 bytes
Lines
160
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct vbox_private {
	/* Must be first; or we must define our own release callback */
	struct drm_device ddev;

	u8 __iomem *guest_heap;
	u8 __iomem *vbva_buffers;
	struct gen_pool *guest_pool;
	struct vbva_buf_ctx *vbva_info;
	bool any_pitch;
	u32 num_crtcs;
	/* Amount of available VRAM, including space used for buffers. */
	u32 full_vram_size;
	/* Amount of available VRAM, not including space used for buffers. */
	u32 available_vram_size;
	/* Array of structures for receiving mode hints. */
	struct vbva_modehint *last_mode_hints;

	int fb_mtrr;

	struct mutex hw_mutex; /* protects modeset and accel/vbva accesses */
	struct work_struct hotplug_work;
	u32 input_mapping_width;
	u32 input_mapping_height;
	/*
	 * Is user-space using an X.Org-style layout of one large frame-buffer
	 * encompassing all screen ones or is the fbdev console active?
	 */
	bool single_framebuffer;
	u8 cursor_data[CURSOR_DATA_SIZE];
};

#undef CURSOR_PIXEL_COUNT
#undef CURSOR_DATA_SIZE

struct vbox_connector {
	struct drm_connector base;
	char name[32];
	struct vbox_crtc *vbox_crtc;
	struct {
		u32 width;
		u32 height;
		bool disconnected;
	} mode_hint;
};

struct vbox_crtc {
	struct drm_crtc base;
	bool disconnected;
	unsigned int crtc_id;
	u32 fb_offset;
	bool cursor_enabled;
	u32 x_hint;
	u32 y_hint;
	/*
	 * When setting a mode we not only pass the mode to the hypervisor,
	 * but also information on how to map / translate input coordinates
	 * for the emulated USB tablet.  This input-mapping may change when
	 * the mode on *another* crtc changes.
	 *
	 * This means that sometimes we must do a modeset on other crtc-s then
	 * the one being changed to update the input-mapping. Including crtc-s
	 * which may be disabled inside the guest (shown as a black window
	 * on the host unless closed by the user).
	 *
	 * With atomic modesetting the mode-info of disabled crtcs gets zeroed
	 * yet we need it when updating the input-map to avoid resizing the
	 * window as a side effect of a mode_set on another crtc. Therefor we
	 * cache the info of the last mode below.
	 */
	u32 width;
	u32 height;
	u32 x;
	u32 y;
};

struct vbox_encoder {
	struct drm_encoder base;
};

#define to_vbox_crtc(x) container_of(x, struct vbox_crtc, base)
#define to_vbox_connector(x) container_of(x, struct vbox_connector, base)
#define to_vbox_encoder(x) container_of(x, struct vbox_encoder, base)
#define to_vbox_dev(x) container_of(x, struct vbox_private, ddev)

bool vbox_check_supported(u16 id);
int vbox_hw_init(struct vbox_private *vbox);
void vbox_hw_fini(struct vbox_private *vbox);

int vbox_mode_init(struct vbox_private *vbox);
void vbox_mode_fini(struct vbox_private *vbox);

Annotation

Implementation Notes