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vga: catch depth 0

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hw/display: add new bochs-display device
 some cleanups.
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Merge remote-tracking branch 'remotes/kraxel/tags/vga-20180524-pull-request' into staging

vga: catch depth 0
hw/display: add new bochs-display device
some cleanups.

# gpg: Signature made Thu 24 May 2018 16:45:46 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/vga-20180524-pull-request:
  MAINTAINERS: add vga entries
  bochs-display: add pcie support
  bochs-display: add dirty tracking support
  hw/display: add new bochs-display device
  vga-pci: use PCI_VGA_MMIO_SIZE
  vga: move bochs vbe defines to header file
  vga: catch depth 0

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-05-24 17:48:01 +01:00
commit 62b9b076d9
7 changed files with 478 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
MAINTAINERS
View File

@ -1314,6 +1314,27 @@ S: Maintained
F: include/hw/misc/unimp.h
F: hw/misc/unimp.c
Standard VGA
M: Gerd Hoffmann <kraxel@redhat.com>
S: Maintained
F: hw/display/vga*
F: hw/display/bochs-display.c
F: include/hw/display/vga.h
F: include/hw/display/bochs-vbe.h
virtio-gpu
M: Gerd Hoffmann <kraxel@redhat.com>
S: Maintained
F: hw/display/virtio-gpu*
F: hw/display/virtio-vga.c
F: include/hw/virtio/virtio-gpu.h
Cirrus VGA
M: Gerd Hoffmann <kraxel@redhat.com>
S: Odd Fixes
W: https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
F: hw/display/cirrus*
Subsystems
----------
Audio

1
hw/display/Makefile.objs
View File

@ -9,6 +9,7 @@ common-obj-$(CONFIG_SSD0323) += ssd0323.o
common-obj-$(CONFIG_XEN) += xenfb.o
common-obj-$(CONFIG_VGA_PCI) += vga-pci.o
common-obj-$(CONFIG_VGA_PCI) += bochs-display.o
common-obj-$(CONFIG_VGA_ISA) += vga-isa.o
common-obj-$(CONFIG_VGA_ISA_MM) += vga-isa-mm.o
common-obj-$(CONFIG_VMWARE_VGA) += vmware_vga.o

363
hw/display/bochs-display.c Normal file
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@ -0,0 +1,363 @@
/*
* 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 "hw/hw.h"
#include "hw/pci/pci.h"
#include "hw/display/bochs-vbe.h"
#include "qapi/error.h"
#include "ui/console.h"
#include "ui/qemu-pixman.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;
typedef struct BochsDisplayState {
/* parent */
PCIDevice pci;
/* device elements */
QemuConsole *con;
MemoryRegion vram;
MemoryRegion mmio;
MemoryRegion vbe;
MemoryRegion qext;
/* device config */
uint64_t vgamem;
/* device registers */
uint16_t vbe_regs[VBE_DISPI_INDEX_NB];
bool big_endian_fb;
/* device state */
BochsDisplayMode mode;
} BochsDisplayState;
#define TYPE_BOCHS_DISPLAY "bochs-display"
#define BOCHS_DISPLAY(obj) OBJECT_CHECK(BochsDisplayState, (obj), \
TYPE_BOCHS_DISPLAY)
static const VMStateDescription vmstate_bochs_display = {
.name = "bochs-display",
.fields = (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 * 1024);
}
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 endianess only */
mode->format = PIXMAN_r5g6b5;
mode->bytepp = 2;
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);
}
}
}
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;
s->con = graphic_console_init(DEVICE(dev), 0, &bochs_display_gfx_ops, s);
if (s->vgamem < (4 * 1024 * 1024)) {
error_setg(errp, "bochs-display: video memory too small");
}
if (s->vgamem > (256 * 1024 * 1024)) {
error_setg(errp, "bochs-display: video memory too big");
}
s->vgamem = pow2ceil(s->vgamem);
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(&s->mmio, obj, "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 (pci_bus_is_express(pci_get_bus(dev))) {
dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
ret = pcie_endpoint_cap_init(dev, 0x80);
assert(ret > 0);
}
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)
{
/* 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,
NULL);
}
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 * 1024 * 1024),
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->exit = bochs_display_exit;
dc->vmsd = &vmstate_bochs_display;
dc->props = 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)

19
hw/display/vga-pci.c
View File

@ -31,19 +31,6 @@
#include "qemu/timer.h"
#include "hw/loader.h"
#define PCI_VGA_IOPORT_OFFSET 0x400
#define PCI_VGA_IOPORT_SIZE (0x3e0 - 0x3c0)
#define PCI_VGA_BOCHS_OFFSET 0x500
#define PCI_VGA_BOCHS_SIZE (0x0b * 2)
#define PCI_VGA_QEXT_OFFSET 0x600
#define PCI_VGA_QEXT_SIZE (2 * 4)
#define PCI_VGA_MMIO_SIZE 0x1000
#define PCI_VGA_QEXT_REG_SIZE (0 * 4)
#define PCI_VGA_QEXT_REG_BYTEORDER (1 * 4)
#define PCI_VGA_QEXT_LITTLE_ENDIAN 0x1e1e1e1e
#define PCI_VGA_QEXT_BIG_ENDIAN 0xbebebebe
enum vga_pci_flags {
PCI_VGA_FLAG_ENABLE_MMIO = 1,
PCI_VGA_FLAG_ENABLE_QEXT = 2,
@ -245,7 +232,8 @@ static void pci_std_vga_realize(PCIDevice *dev, Error **errp)
/* mmio bar for vga register access */
if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) {
memory_region_init(&d->mmio, NULL, "vga.mmio", 4096);
memory_region_init(&d->mmio, NULL, "vga.mmio",
PCI_VGA_MMIO_SIZE);
if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
qext = true;
@ -280,7 +268,8 @@ static void pci_secondary_vga_realize(PCIDevice *dev, Error **errp)
s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
/* mmio bar */
memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio", 4096);
memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio",
PCI_VGA_MMIO_SIZE);
if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
qext = true;

23
hw/display/vga.c
View File

@ -1480,13 +1480,28 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
s->get_resolution(s, &width, &height);
disp_width = width;
depth = s->get_bpp(s);
region_start = (s->start_addr * 4);
region_end = region_start + (ram_addr_t)s->line_offset * height;
region_end += width * s->get_bpp(s) / 8; /* scanline length */
region_end += width * depth / 8; /* scanline length */
region_end -= s->line_offset;
if (region_end > s->vbe_size) {
/* wraps around (can happen with cirrus vbe modes) */
if (region_end > s->vbe_size || depth == 0 || depth == 15) {
/*
* We land here on:
* - wraps around (can happen with cirrus vbe modes)
* - depth == 0 (256 color palette video mode)
* - depth == 15
*
* Take the safe and slow route:
* - create a dirty bitmap snapshot for all vga memory.
* - force shadowing (so all vga memory access goes
* through vga_read_*() helpers).
*
* Given this affects only vga features which are pretty much
* unused by modern guests there should be no performance
* impact.
*/
region_start = 0;
region_end = s->vbe_size;
force_shadow = true;
@ -1520,8 +1535,6 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
}
}
depth = s->get_bpp(s);
/*
* Check whether we can share the surface with the backend
* or whether we need a shadow surface. We share native

35
hw/display/vga_int.h
View File

@ -29,42 +29,11 @@
#include "exec/memory.h"
#include "ui/console.h"
#include "hw/display/bochs-vbe.h"
#define ST01_V_RETRACE 0x08
#define ST01_DISP_ENABLE 0x01
#define VBE_DISPI_MAX_XRES 16000
#define VBE_DISPI_MAX_YRES 12000
#define VBE_DISPI_MAX_BPP 32
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_NB 0xa /* size of vbe_regs[] */
#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa /* read-only, not in vbe_regs */
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID3 0xB0C3
#define VBE_DISPI_ID4 0xB0C4
#define VBE_DISPI_ID5 0xB0C5
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_GETCAPS 0x02
#define VBE_DISPI_8BIT_DAC 0x20
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
#define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
#define CH_ATTR_SIZE (160 * 100)
#define VGA_MAX_HEIGHT 2048

69
include/hw/display/bochs-vbe.h Normal file
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@ -0,0 +1,69 @@
#ifndef HW_DISPLAY_BOCHS_VBE_H
#define HW_DISPLAY_BOCHS_VBE_H
/*
* bochs vesa bios extension interface
*/
#define VBE_DISPI_MAX_XRES 16000
#define VBE_DISPI_MAX_YRES 12000
#define VBE_DISPI_MAX_BPP 32
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_NB 0xa /* size of vbe_regs[] */
#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa /* read-only, not in vbe_regs */
/* VBE_DISPI_INDEX_ID */
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID3 0xB0C3
#define VBE_DISPI_ID4 0xB0C4
#define VBE_DISPI_ID5 0xB0C5
/* VBE_DISPI_INDEX_ENABLE */
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_GETCAPS 0x02
#define VBE_DISPI_8BIT_DAC 0x20
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
/* only used by isa-vga, pci vga devices use a memory bar */
#define VBE_DISPI_LFB_PHYSICAL_ADDRESS 0xE0000000
/*
* qemu extension: mmio bar (region 2)
*/
#define PCI_VGA_MMIO_SIZE 0x1000
/* vga register region */
#define PCI_VGA_IOPORT_OFFSET 0x400
#define PCI_VGA_IOPORT_SIZE (0x3e0 - 0x3c0)
/* bochs vbe register region */
#define PCI_VGA_BOCHS_OFFSET 0x500
#define PCI_VGA_BOCHS_SIZE (0x0b * 2)
/* qemu extension register region */
#define PCI_VGA_QEXT_OFFSET 0x600
#define PCI_VGA_QEXT_SIZE (2 * 4)
/* qemu extension registers */
#define PCI_VGA_QEXT_REG_SIZE (0 * 4)
#define PCI_VGA_QEXT_REG_BYTEORDER (1 * 4)
#define PCI_VGA_QEXT_LITTLE_ENDIAN 0x1e1e1e1e
#define PCI_VGA_QEXT_BIG_ENDIAN 0xbebebebe
#endif /* HW_DISPLAY_BOCHS_VBE_H */