hw/display/bochs-display.c - qemu - Git at Google

 /*
  * QEMU PCI bochs display adapter.
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  */

 #include "qemu/osdep.h"
 #include "qemu/module.h"
 #include "qemu/units.h"
 #include "hw/pci/pci_device.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
 #include "hw/display/bochs-vbe.h"
 #include "hw/display/edid.h"

 #include "qapi/error.h"

 #include "ui/console.h"
 #include "ui/qemu-pixman.h"
 #include "qom/object.h"

 typedef struct BochsDisplayMode {
     pixman_format_code_t format;
     uint32_t             bytepp;
     uint32_t             width;
     uint32_t             height;
     uint32_t             stride;
     uint64_t             offset;
     uint64_t             size;
 } BochsDisplayMode;

 struct BochsDisplayState {
     /* parent */
     PCIDevice        pci;

     /* device elements */
     QemuConsole      *con;
     MemoryRegion     vram;
     MemoryRegion     mmio;
     MemoryRegion     vbe;
     MemoryRegion     qext;
     MemoryRegion     edid;

     /* device config */
     uint64_t         vgamem;
     bool             enable_edid;
     qemu_edid_info   edid_info;
     uint8_t          edid_blob[256];

     /* device registers */
     uint16_t         vbe_regs[VBE_DISPI_INDEX_NB];
     bool             big_endian_fb;

     /* device state */
     BochsDisplayMode mode;
 };

 #define TYPE_BOCHS_DISPLAY "bochs-display"
 OBJECT_DECLARE_SIMPLE_TYPE(BochsDisplayState, BOCHS_DISPLAY)

 static const VMStateDescription vmstate_bochs_display = {
     .name = "bochs-display",
     .fields = (const VMStateField[]) {
         VMSTATE_PCI_DEVICE(pci, BochsDisplayState),
         VMSTATE_UINT16_ARRAY(vbe_regs, BochsDisplayState, VBE_DISPI_INDEX_NB),
         VMSTATE_BOOL(big_endian_fb, BochsDisplayState),
         VMSTATE_END_OF_LIST()
     }
 };

 static uint64_t bochs_display_vbe_read(void *ptr, hwaddr addr,
                                        unsigned size)
 {
     BochsDisplayState *s = ptr;
     unsigned int index = addr >> 1;

     switch (index) {
     case VBE_DISPI_INDEX_ID:
         return VBE_DISPI_ID5;
     case VBE_DISPI_INDEX_VIDEO_MEMORY_64K:
         return s->vgamem / (64 * KiB);
     }

     if (index >= ARRAY_SIZE(s->vbe_regs)) {
         return -1;
     }
     return s->vbe_regs[index];
 }

 static void bochs_display_vbe_write(void *ptr, hwaddr addr,
                                     uint64_t val, unsigned size)
 {
     BochsDisplayState *s = ptr;
     unsigned int index = addr >> 1;

     if (index >= ARRAY_SIZE(s->vbe_regs)) {
         return;
     }
     s->vbe_regs[index] = val;
 }

 static const MemoryRegionOps bochs_display_vbe_ops = {
     .read = bochs_display_vbe_read,
     .write = bochs_display_vbe_write,
     .valid.min_access_size = 1,
     .valid.max_access_size = 4,
     .impl.min_access_size = 2,
     .impl.max_access_size = 2,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static uint64_t bochs_display_qext_read(void *ptr, hwaddr addr,
                                         unsigned size)
 {
     BochsDisplayState *s = ptr;

     switch (addr) {
     case PCI_VGA_QEXT_REG_SIZE:
         return PCI_VGA_QEXT_SIZE;
     case PCI_VGA_QEXT_REG_BYTEORDER:
         return s->big_endian_fb ?
             PCI_VGA_QEXT_BIG_ENDIAN : PCI_VGA_QEXT_LITTLE_ENDIAN;
     default:
         return 0;
     }
 }

 static void bochs_display_qext_write(void *ptr, hwaddr addr,
                                      uint64_t val, unsigned size)
 {
     BochsDisplayState *s = ptr;

     switch (addr) {
     case PCI_VGA_QEXT_REG_BYTEORDER:
         if (val == PCI_VGA_QEXT_BIG_ENDIAN) {
             s->big_endian_fb = true;
         }
         if (val == PCI_VGA_QEXT_LITTLE_ENDIAN) {
             s->big_endian_fb = false;
         }
         break;
     }
 }

 static const MemoryRegionOps bochs_display_qext_ops = {
     .read = bochs_display_qext_read,
     .write = bochs_display_qext_write,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };

 static int bochs_display_get_mode(BochsDisplayState *s,
                                    BochsDisplayMode *mode)
 {
     uint16_t *vbe = s->vbe_regs;
     uint32_t virt_width;

     if (!(vbe[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
         return -1;
     }

     memset(mode, 0, sizeof(*mode));
     switch (vbe[VBE_DISPI_INDEX_BPP]) {
     case 16:
         /* best effort: support native endianness only */
         mode->format = PIXMAN_r5g6b5;
         mode->bytepp = 2;
         break;
     case 32:
         mode->format = s->big_endian_fb
             ? PIXMAN_BE_x8r8g8b8
             : PIXMAN_LE_x8r8g8b8;
         mode->bytepp = 4;
         break;
     default:
         return -1;
     }

     mode->width  = vbe[VBE_DISPI_INDEX_XRES];
     mode->height = vbe[VBE_DISPI_INDEX_YRES];
     virt_width  = vbe[VBE_DISPI_INDEX_VIRT_WIDTH];
     if (virt_width < mode->width) {
         virt_width = mode->width;
     }
     mode->stride = virt_width * mode->bytepp;
     mode->size   = (uint64_t)mode->stride * mode->height;
     mode->offset = ((uint64_t)vbe[VBE_DISPI_INDEX_X_OFFSET] * mode->bytepp +
                     (uint64_t)vbe[VBE_DISPI_INDEX_Y_OFFSET] * mode->stride);

     if (mode->width < 64 || mode->height < 64) {
         return -1;
     }
     if (mode->offset + mode->size > s->vgamem) {
         return -1;
     }
     return 0;
 }

 static void bochs_display_update(void *opaque)
 {
     BochsDisplayState *s = opaque;
     DirtyBitmapSnapshot *snap = NULL;
     bool full_update = false;
     BochsDisplayMode mode;
     DisplaySurface *ds;
     uint8_t *ptr;
     bool dirty;
     int y, ys, ret;

     ret = bochs_display_get_mode(s, &mode);
     if (ret < 0) {
         /* no (valid) video mode */
         return;
     }

     if (memcmp(&s->mode, &mode, sizeof(mode)) != 0) {
         /* video mode switch */
         s->mode = mode;
         ptr = memory_region_get_ram_ptr(&s->vram);
         ds = qemu_create_displaysurface_from(mode.width,
                                              mode.height,
                                              mode.format,
                                              mode.stride,
                                              ptr + mode.offset);
         dpy_gfx_replace_surface(s->con, ds);
         full_update = true;
     }

     if (full_update) {
         dpy_gfx_update_full(s->con);
     } else {
         snap = memory_region_snapshot_and_clear_dirty(&s->vram,
                                                       mode.offset, mode.size,
                                                       DIRTY_MEMORY_VGA);
         ys = -1;
         for (y = 0; y < mode.height; y++) {
             dirty = memory_region_snapshot_get_dirty(&s->vram, snap,
                                                      mode.offset + mode.stride * y,
                                                      mode.stride);
             if (dirty && ys < 0) {
                 ys = y;
             }
             if (!dirty && ys >= 0) {
                 dpy_gfx_update(s->con, 0, ys,
                                mode.width, y - ys);
                 ys = -1;
             }
         }
         if (ys >= 0) {
             dpy_gfx_update(s->con, 0, ys,
                            mode.width, y - ys);
         }

         g_free(snap);
     }
 }

 static const GraphicHwOps bochs_display_gfx_ops = {
     .gfx_update = bochs_display_update,
 };

 static void bochs_display_realize(PCIDevice *dev, Error **errp)
 {
     BochsDisplayState *s = BOCHS_DISPLAY(dev);
     Object *obj = OBJECT(dev);
     int ret;

     if (s->vgamem < 4 * MiB) {
         error_setg(errp, "bochs-display: video memory too small");
         return;
     }
     if (s->vgamem > 256 * MiB) {
         error_setg(errp, "bochs-display: video memory too big");
         return;
     }
     s->vgamem = pow2ceil(s->vgamem);

     s->con = graphic_console_init(DEVICE(dev), 0, &bochs_display_gfx_ops, s);

     memory_region_init_ram(&s->vram, obj, "bochs-display-vram", s->vgamem,
                            &error_fatal);
     memory_region_init_io(&s->vbe, obj, &bochs_display_vbe_ops, s,
                           "bochs dispi interface", PCI_VGA_BOCHS_SIZE);
     memory_region_init_io(&s->qext, obj, &bochs_display_qext_ops, s,
                           "qemu extended regs", PCI_VGA_QEXT_SIZE);

     memory_region_init_io(&s->mmio, obj, &unassigned_io_ops, NULL,
                           "bochs-display-mmio", PCI_VGA_MMIO_SIZE);
     memory_region_add_subregion(&s->mmio, PCI_VGA_BOCHS_OFFSET, &s->vbe);
     memory_region_add_subregion(&s->mmio, PCI_VGA_QEXT_OFFSET, &s->qext);

     pci_set_byte(&s->pci.config[PCI_REVISION_ID], 2);
     pci_register_bar(&s->pci, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
     pci_register_bar(&s->pci, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio);

     if (s->enable_edid) {
         qemu_edid_generate(s->edid_blob, sizeof(s->edid_blob), &s->edid_info);
         qemu_edid_region_io(&s->edid, obj, s->edid_blob, sizeof(s->edid_blob));
         memory_region_add_subregion(&s->mmio, 0, &s->edid);
     }

     if (pci_bus_is_express(pci_get_bus(dev))) {
         ret = pcie_endpoint_cap_init(dev, 0x80);
         assert(ret > 0);
     } else {
         dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
     }

     memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
 }

 static bool bochs_display_get_big_endian_fb(Object *obj, Error **errp)
 {
     BochsDisplayState *s = BOCHS_DISPLAY(obj);

     return s->big_endian_fb;
 }

 static void bochs_display_set_big_endian_fb(Object *obj, bool value,
                                             Error **errp)
 {
     BochsDisplayState *s = BOCHS_DISPLAY(obj);

     s->big_endian_fb = value;
 }

 static void bochs_display_init(Object *obj)
 {
     PCIDevice *dev = PCI_DEVICE(obj);

     /* Expose framebuffer byteorder via QOM */
     object_property_add_bool(obj, "big-endian-framebuffer",
                              bochs_display_get_big_endian_fb,
                              bochs_display_set_big_endian_fb);

     dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
 }

 static void bochs_display_exit(PCIDevice *dev)
 {
     BochsDisplayState *s = BOCHS_DISPLAY(dev);

     graphic_console_close(s->con);
 }

 static Property bochs_display_properties[] = {
     DEFINE_PROP_SIZE("vgamem", BochsDisplayState, vgamem, 16 * MiB),
     DEFINE_PROP_BOOL("edid", BochsDisplayState, enable_edid, true),
     DEFINE_EDID_PROPERTIES(BochsDisplayState, edid_info),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void bochs_display_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

     k->class_id  = PCI_CLASS_DISPLAY_OTHER;
     k->vendor_id = PCI_VENDOR_ID_QEMU;
     k->device_id = PCI_DEVICE_ID_QEMU_VGA;

     k->realize   = bochs_display_realize;
     k->romfile   = "vgabios-bochs-display.bin";
     k->exit      = bochs_display_exit;
     dc->vmsd     = &vmstate_bochs_display;
     device_class_set_props(dc, bochs_display_properties);
     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 }

 static const TypeInfo bochs_display_type_info = {
     .name           = TYPE_BOCHS_DISPLAY,
     .parent         = TYPE_PCI_DEVICE,
     .instance_size  = sizeof(BochsDisplayState),
     .instance_init  = bochs_display_init,
     .class_init     = bochs_display_class_init,
     .interfaces     = (InterfaceInfo[]) {
         { INTERFACE_PCIE_DEVICE },
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
         { },
     },
 };

 static void bochs_display_register_types(void)
 {
     type_register_static(&bochs_display_type_info);
 }

 type_init(bochs_display_register_types)
	/*
	* QEMU PCI bochs display adapter.
	*
	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	* See the COPYING file in the top-level directory.
	*/

	#include "qemu/osdep.h"
	#include "qemu/module.h"
	#include "qemu/units.h"
	#include "hw/pci/pci_device.h"
	#include "hw/qdev-properties.h"
	#include "migration/vmstate.h"
	#include "hw/display/bochs-vbe.h"
	#include "hw/display/edid.h"

	#include "qapi/error.h"

	#include "ui/console.h"
	#include "ui/qemu-pixman.h"
	#include "qom/object.h"

	typedef struct BochsDisplayMode {
	pixman_format_code_t format;
	uint32_t bytepp;
	uint32_t width;
	uint32_t height;
	uint32_t stride;
	uint64_t offset;
	uint64_t size;
	} BochsDisplayMode;

	struct BochsDisplayState {
	/* parent */
	PCIDevice pci;

	/* device elements */
	QemuConsole *con;
	MemoryRegion vram;
	MemoryRegion mmio;
	MemoryRegion vbe;
	MemoryRegion qext;
	MemoryRegion edid;

	/* device config */
	uint64_t vgamem;
	bool enable_edid;
	qemu_edid_info edid_info;
	uint8_t edid_blob[256];

	/* device registers */
	uint16_t vbe_regs[VBE_DISPI_INDEX_NB];
	bool big_endian_fb;

	/* device state */
	BochsDisplayMode mode;
	};

	#define TYPE_BOCHS_DISPLAY "bochs-display"
	OBJECT_DECLARE_SIMPLE_TYPE(BochsDisplayState, BOCHS_DISPLAY)

	static const VMStateDescription vmstate_bochs_display = {
	.name = "bochs-display",
	.fields = (const VMStateField[]) {
	VMSTATE_PCI_DEVICE(pci, BochsDisplayState),
	VMSTATE_UINT16_ARRAY(vbe_regs, BochsDisplayState, VBE_DISPI_INDEX_NB),
	VMSTATE_BOOL(big_endian_fb, BochsDisplayState),
	VMSTATE_END_OF_LIST()
	}
	};

	static uint64_t bochs_display_vbe_read(void *ptr, hwaddr addr,
	unsigned size)
	{
	BochsDisplayState *s = ptr;
	unsigned int index = addr >> 1;

	switch (index) {
	case VBE_DISPI_INDEX_ID:
	return VBE_DISPI_ID5;
	case VBE_DISPI_INDEX_VIDEO_MEMORY_64K:
	return s->vgamem / (64 * KiB);
	}

	if (index >= ARRAY_SIZE(s->vbe_regs)) {
	return -1;
	}
	return s->vbe_regs[index];
	}

	static void bochs_display_vbe_write(void *ptr, hwaddr addr,
	uint64_t val, unsigned size)
	{
	BochsDisplayState *s = ptr;
	unsigned int index = addr >> 1;

	if (index >= ARRAY_SIZE(s->vbe_regs)) {
	return;
	}
	s->vbe_regs[index] = val;
	}

	static const MemoryRegionOps bochs_display_vbe_ops = {
	.read = bochs_display_vbe_read,
	.write = bochs_display_vbe_write,
	.valid.min_access_size = 1,
	.valid.max_access_size = 4,
	.impl.min_access_size = 2,
	.impl.max_access_size = 2,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static uint64_t bochs_display_qext_read(void *ptr, hwaddr addr,
	unsigned size)
	{
	BochsDisplayState *s = ptr;

	switch (addr) {
	case PCI_VGA_QEXT_REG_SIZE:
	return PCI_VGA_QEXT_SIZE;
	case PCI_VGA_QEXT_REG_BYTEORDER:
	return s->big_endian_fb ?
	PCI_VGA_QEXT_BIG_ENDIAN : PCI_VGA_QEXT_LITTLE_ENDIAN;
	default:
	return 0;
	}
	}

	static void bochs_display_qext_write(void *ptr, hwaddr addr,
	uint64_t val, unsigned size)
	{
	BochsDisplayState *s = ptr;

	switch (addr) {
	case PCI_VGA_QEXT_REG_BYTEORDER:
	if (val == PCI_VGA_QEXT_BIG_ENDIAN) {
	s->big_endian_fb = true;
	}
	if (val == PCI_VGA_QEXT_LITTLE_ENDIAN) {
	s->big_endian_fb = false;
	}
	break;
	}
	}

	static const MemoryRegionOps bochs_display_qext_ops = {
	.read = bochs_display_qext_read,
	.write = bochs_display_qext_write,
	.valid.min_access_size = 4,
	.valid.max_access_size = 4,
	.endianness = DEVICE_LITTLE_ENDIAN,
	};

	static int bochs_display_get_mode(BochsDisplayState *s,
	BochsDisplayMode *mode)
	{
	uint16_t *vbe = s->vbe_regs;
	uint32_t virt_width;

	if (!(vbe[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) {
	return -1;
	}

	memset(mode, 0, sizeof(*mode));
	switch (vbe[VBE_DISPI_INDEX_BPP]) {
	case 16:
	/* best effort: support native endianness only */
	mode->format = PIXMAN_r5g6b5;
	mode->bytepp = 2;
	break;
	case 32:
	mode->format = s->big_endian_fb
	? PIXMAN_BE_x8r8g8b8
	: PIXMAN_LE_x8r8g8b8;
	mode->bytepp = 4;
	break;
	default:
	return -1;
	}

	mode->width = vbe[VBE_DISPI_INDEX_XRES];
	mode->height = vbe[VBE_DISPI_INDEX_YRES];
	virt_width = vbe[VBE_DISPI_INDEX_VIRT_WIDTH];
	if (virt_width < mode->width) {
	virt_width = mode->width;
	}
	mode->stride = virt_width * mode->bytepp;
	mode->size = (uint64_t)mode->stride * mode->height;
	mode->offset = ((uint64_t)vbe[VBE_DISPI_INDEX_X_OFFSET] * mode->bytepp +
	(uint64_t)vbe[VBE_DISPI_INDEX_Y_OFFSET] * mode->stride);

	if (mode->width < 64 \|\| mode->height < 64) {
	return -1;
	}
	if (mode->offset + mode->size > s->vgamem) {
	return -1;
	}
	return 0;
	}

	static void bochs_display_update(void *opaque)
	{
	BochsDisplayState *s = opaque;
	DirtyBitmapSnapshot *snap = NULL;
	bool full_update = false;
	BochsDisplayMode mode;
	DisplaySurface *ds;
	uint8_t *ptr;
	bool dirty;
	int y, ys, ret;

	ret = bochs_display_get_mode(s, &mode);
	if (ret < 0) {
	/* no (valid) video mode */
	return;
	}

	if (memcmp(&s->mode, &mode, sizeof(mode)) != 0) {
	/* video mode switch */
	s->mode = mode;
	ptr = memory_region_get_ram_ptr(&s->vram);
	ds = qemu_create_displaysurface_from(mode.width,
	mode.height,
	mode.format,
	mode.stride,
	ptr + mode.offset);
	dpy_gfx_replace_surface(s->con, ds);
	full_update = true;
	}

	if (full_update) {
	dpy_gfx_update_full(s->con);
	} else {
	snap = memory_region_snapshot_and_clear_dirty(&s->vram,
	mode.offset, mode.size,
	DIRTY_MEMORY_VGA);
	ys = -1;
	for (y = 0; y < mode.height; y++) {
	dirty = memory_region_snapshot_get_dirty(&s->vram, snap,
	mode.offset + mode.stride * y,
	mode.stride);
	if (dirty && ys < 0) {
	ys = y;
	}
	if (!dirty && ys >= 0) {
	dpy_gfx_update(s->con, 0, ys,
	mode.width, y - ys);
	ys = -1;
	}
	}
	if (ys >= 0) {
	dpy_gfx_update(s->con, 0, ys,
	mode.width, y - ys);
	}

	g_free(snap);
	}
	}

	static const GraphicHwOps bochs_display_gfx_ops = {
	.gfx_update = bochs_display_update,
	};

	static void bochs_display_realize(PCIDevice dev, Error *errp)
	{
	BochsDisplayState *s = BOCHS_DISPLAY(dev);
	Object *obj = OBJECT(dev);
	int ret;

	if (s->vgamem < 4 * MiB) {
	error_setg(errp, "bochs-display: video memory too small");
	return;
	}
	if (s->vgamem > 256 * MiB) {
	error_setg(errp, "bochs-display: video memory too big");
	return;
	}
	s->vgamem = pow2ceil(s->vgamem);

	s->con = graphic_console_init(DEVICE(dev), 0, &bochs_display_gfx_ops, s);

	memory_region_init_ram(&s->vram, obj, "bochs-display-vram", s->vgamem,
	&error_fatal);
	memory_region_init_io(&s->vbe, obj, &bochs_display_vbe_ops, s,
	"bochs dispi interface", PCI_VGA_BOCHS_SIZE);
	memory_region_init_io(&s->qext, obj, &bochs_display_qext_ops, s,
	"qemu extended regs", PCI_VGA_QEXT_SIZE);

	memory_region_init_io(&s->mmio, obj, &unassigned_io_ops, NULL,
	"bochs-display-mmio", PCI_VGA_MMIO_SIZE);
	memory_region_add_subregion(&s->mmio, PCI_VGA_BOCHS_OFFSET, &s->vbe);
	memory_region_add_subregion(&s->mmio, PCI_VGA_QEXT_OFFSET, &s->qext);

	pci_set_byte(&s->pci.config[PCI_REVISION_ID], 2);
	pci_register_bar(&s->pci, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
	pci_register_bar(&s->pci, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio);

	if (s->enable_edid) {
	qemu_edid_generate(s->edid_blob, sizeof(s->edid_blob), &s->edid_info);
	qemu_edid_region_io(&s->edid, obj, s->edid_blob, sizeof(s->edid_blob));
	memory_region_add_subregion(&s->mmio, 0, &s->edid);
	}

	if (pci_bus_is_express(pci_get_bus(dev))) {
	ret = pcie_endpoint_cap_init(dev, 0x80);
	assert(ret > 0);
	} else {
	dev->cap_present &= ~QEMU_PCI_CAP_EXPRESS;
	}

	memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA);
	}

	static bool bochs_display_get_big_endian_fb(Object obj, Error *errp)
	{
	BochsDisplayState *s = BOCHS_DISPLAY(obj);

	return s->big_endian_fb;
	}

	static void bochs_display_set_big_endian_fb(Object *obj, bool value,
	Error **errp)
	{
	BochsDisplayState *s = BOCHS_DISPLAY(obj);

	s->big_endian_fb = value;
	}

	static void bochs_display_init(Object *obj)
	{
	PCIDevice *dev = PCI_DEVICE(obj);

	/* Expose framebuffer byteorder via QOM */
	object_property_add_bool(obj, "big-endian-framebuffer",
	bochs_display_get_big_endian_fb,
	bochs_display_set_big_endian_fb);

	dev->cap_present \|= QEMU_PCI_CAP_EXPRESS;
	}

	static void bochs_display_exit(PCIDevice *dev)
	{
	BochsDisplayState *s = BOCHS_DISPLAY(dev);

	graphic_console_close(s->con);
	}

	static Property bochs_display_properties[] = {
	DEFINE_PROP_SIZE("vgamem", BochsDisplayState, vgamem, 16 * MiB),
	DEFINE_PROP_BOOL("edid", BochsDisplayState, enable_edid, true),
	DEFINE_EDID_PROPERTIES(BochsDisplayState, edid_info),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void bochs_display_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

	k->class_id = PCI_CLASS_DISPLAY_OTHER;
	k->vendor_id = PCI_VENDOR_ID_QEMU;
	k->device_id = PCI_DEVICE_ID_QEMU_VGA;

	k->realize = bochs_display_realize;
	k->romfile = "vgabios-bochs-display.bin";
	k->exit = bochs_display_exit;
	dc->vmsd = &vmstate_bochs_display;
	device_class_set_props(dc, bochs_display_properties);
	set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
	}

	static const TypeInfo bochs_display_type_info = {
	.name = TYPE_BOCHS_DISPLAY,
	.parent = TYPE_PCI_DEVICE,
	.instance_size = sizeof(BochsDisplayState),
	.instance_init = bochs_display_init,
	.class_init = bochs_display_class_init,
	.interfaces = (InterfaceInfo[]) {
	{ INTERFACE_PCIE_DEVICE },
	{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
	{ },
	},
	};

	static void bochs_display_register_types(void)
	{
	type_register_static(&bochs_display_type_info);
	}

	type_init(bochs_display_register_types)