drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
Extension
.c
Size
38953 bytes
Lines
1367
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 vmw_kms_sou_surface_dirty {
	struct vmw_kms_dirty base;
	s32 left, right, top, bottom;
	s32 dst_x, dst_y;
	u32 sid;
};

/*
 * SVGA commands that are used by this code. Please see the device headers
 * for explanation.
 */
struct vmw_kms_sou_readback_blit {
	uint32 header;
	SVGAFifoCmdBlitScreenToGMRFB body;
};

struct vmw_kms_sou_bo_blit {
	uint32 header;
	SVGAFifoCmdBlitGMRFBToScreen body;
};

struct vmw_kms_sou_dirty_cmd {
	SVGA3dCmdHeader header;
	SVGA3dCmdBlitSurfaceToScreen body;
};

struct vmw_kms_sou_define_gmrfb {
	uint32_t header;
	SVGAFifoCmdDefineGMRFB body;
};

/*
 * Display unit using screen objects.
 */
struct vmw_screen_object_unit {
	struct vmw_display_unit base;

	struct vmw_bo *buffer; /**< Backing store buffer */

	bool defined;
};

static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
{
	vmw_du_cleanup(&sou->base);
	kfree(sou);
}


/*
 * Screen Object Display Unit CRTC functions
 */

static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
{
	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
}

/*
 * Send the fifo command to create a screen.
 */
static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
			       struct vmw_screen_object_unit *sou,
			       int x, int y,
			       struct drm_display_mode *mode)
{
	size_t fifo_size;

	struct {
		struct {
			uint32_t cmdType;
		} header;
		SVGAScreenObject obj;
	} *cmd;

	BUG_ON(!sou->buffer);

	fifo_size = sizeof(*cmd);
	cmd = VMW_CMD_RESERVE(dev_priv, fifo_size);
	if (unlikely(cmd == NULL))
		return -ENOMEM;

	memset(cmd, 0, fifo_size);
	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
	cmd->obj.structSize = sizeof(SVGAScreenObject);
	cmd->obj.id = sou->base.unit;
	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
		(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
	cmd->obj.size.width = mode->hdisplay;
	cmd->obj.size.height = mode->vdisplay;

Annotation

Implementation Notes