[Qemu-devel] [PATCH 7/8] virtio-vga: v1

[Dave Airlie <airlied@gmail.com>]

From: Dave Airlie <airlied@redhat.com>

This is a virtio-vga device built on top of the virtio-gpu device.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 Makefile                           |   2 +-
 default-configs/x86_64-softmmu.mak |   1 +
 hw/display/Makefile.objs           |   1 +
 hw/display/virtio-vga.c            | 156 +++++++++++++++++++++++++++++++++++++
 hw/pci/pci.c                       |   2 +
 include/sysemu/sysemu.h            |   2 +-
 pc-bios/vgabios-virtio.bin         | Bin 0 -> 40448 bytes
 roms/Makefile                      |   2 +-
 roms/config.vga.virtio             |   6 ++
 vl.c                               |  13 ++++
 10 files changed, 182 insertions(+), 3 deletions(-)
 create mode 100644 hw/display/virtio-vga.c
 create mode 100644 pc-bios/vgabios-virtio.bin
 create mode 100644 roms/config.vga.virtio

diff --git a/Makefile b/Makefile
index b15003f..093ff9a 100644
--- a/Makefile
+++ b/Makefile
@@ -284,7 +284,7 @@ bepo
 
 ifdef INSTALL_BLOBS
 BLOBS=bios.bin sgabios.bin vgabios.bin vgabios-cirrus.bin \
-vgabios-stdvga.bin vgabios-vmware.bin vgabios-qxl.bin \
+vgabios-stdvga.bin vgabios-vmware.bin vgabios-qxl.bin vgabios-virtio.bin \
 acpi-dsdt.aml q35-acpi-dsdt.aml \
 ppc_rom.bin openbios-sparc32 openbios-sparc64 openbios-ppc \
 pxe-e1000.rom pxe-eepro100.rom pxe-ne2k_pci.rom \
diff --git a/default-configs/x86_64-softmmu.mak b/default-configs/x86_64-softmmu.mak
index 1a00b78..22d8587 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -10,6 +10,7 @@ CONFIG_VGA_ISA=y
 CONFIG_VGA_CIRRUS=y
 CONFIG_VMWARE_VGA=y
 CONFIG_VIRTIO_GPU=y
+CONFIG_VIRTIO_VGA=y
 CONFIG_VMMOUSE=y
 CONFIG_SERIAL=y
 CONFIG_PARALLEL=y
diff --git a/hw/display/Makefile.objs b/hw/display/Makefile.objs
index 10e4066..63427e9 100644
--- a/hw/display/Makefile.objs
+++ b/hw/display/Makefile.objs
@@ -34,3 +34,4 @@ obj-$(CONFIG_VGA) += vga.o
 common-obj-$(CONFIG_QXL) += qxl.o qxl-logger.o qxl-render.o
 
 obj-$(CONFIG_VIRTIO_GPU) += virtio-gpu.o
+obj-$(CONFIG_VIRTIO_VGA) += virtio-vga.o
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
new file mode 100644
index 0000000..a6c9438
--- /dev/null
+++ b/hw/display/virtio-vga.c
@@ -0,0 +1,156 @@
+#include "hw/hw.h"
+#include "hw/pci/pci.h"
+#include "ui/console.h"
+#include "vga_int.h"
+#include "hw/virtio/virtio-pci.h"
+
+/*
+ * virtio-vga: This extends VirtIOGPUPCI
+ */
+#define TYPE_VIRTIO_VGA "virtio-vga"
+#define VIRTIO_VGA(obj) \
+        OBJECT_CHECK(VirtIOVGA, (obj), TYPE_VIRTIO_VGA)
+
+typedef struct VirtIOVGA VirtIOVGA;
+struct VirtIOVGA {
+    struct VirtIOGPUPCI gpu;
+    VGACommonState     vga;
+    const struct GraphicHwOps *wrapped_ops;
+    void *wrapped_opaque;
+};
+
+static void virtio_vga_invalidate_display(void *opaque)
+{
+    VirtIOVGA *vvga = opaque;
+
+    if (!vvga->gpu.vdev.enable) {
+	vvga->vga.hw_ops->invalidate(&vvga->vga);
+	return;
+    }
+
+    vvga->wrapped_ops->invalidate(vvga->wrapped_opaque);
+}
+
+static void virtio_vga_update_display(void *opaque)
+{
+    VirtIOVGA *vvga = opaque;
+
+    if (!vvga->gpu.vdev.enable) {
+	vvga->vga.hw_ops->gfx_update(&vvga->vga);
+    }
+    vvga->wrapped_ops->gfx_update(vvga->wrapped_opaque);
+}
+
+static void virtio_vga_text_update(void *opaque, console_ch_t *chardata)
+{
+    VirtIOVGA *vvga = opaque;
+
+    if (!vvga->gpu.vdev.enable) {
+	if (vvga->vga.hw_ops->text_update)
+	    vvga->vga.hw_ops->text_update(&vvga->vga, chardata);
+    }
+    vvga->wrapped_ops->text_update(vvga->wrapped_opaque, chardata);
+}
+
+static void virtio_vga_notify_state(void *opaque, int idx, int x, int y, uint32_t width, uint32_t height)
+{
+    VirtIOVGA *vvga = opaque;
+
+    if (!vvga->gpu.vdev.enable) {
+        if (vvga->vga.hw_ops->notify_state)
+	    vvga->vga.hw_ops->notify_state(&vvga->vga, idx, x, y, width, height);
+    }
+    vvga->wrapped_ops->notify_state(vvga->wrapped_opaque, idx, x, y, width, height);
+}
+
+static const GraphicHwOps virtio_vga_ops = {
+    .invalidate = virtio_vga_invalidate_display,
+    .gfx_update = virtio_vga_update_display,
+    .text_update = virtio_vga_text_update,
+    .notify_state = virtio_vga_notify_state,
+};
+
+/* VGA device wrapper around PCI device around virtio GPU */
+static int virtio_vga_init(VirtIOPCIProxy *vpci_dev)
+{
+    VirtIOVGA *vvga = VIRTIO_VGA(vpci_dev);
+    DeviceState *vdev = DEVICE(&vvga->gpu.vdev);
+    VGACommonState *vga = &vvga->vga;
+
+    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+    if (qdev_init(vdev) < 0) {
+	return -1;
+    }
+
+    graphic_console_wrap(vvga->gpu.vdev.con[0], DEVICE(vpci_dev), &virtio_vga_ops, vvga, &vvga->wrapped_ops, &vvga->wrapped_opaque);
+    vga->con = vvga->gpu.vdev.con[0];
+
+    vga_common_init(vga, OBJECT(vpci_dev));
+    vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev), pci_address_space_io(&vpci_dev->pci_dev), true);
+
+    pci_register_bar(&vpci_dev->pci_dev, 2, PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
+
+    if (!vpci_dev->pci_dev.rom_bar) {
+        /* compatibility with pc-0.13 and older */
+        vga_init_vbe(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev));
+    }
+
+    return 0;
+}
+
+static void virtio_vga_reset(DeviceState *dev)
+{
+    VirtIOVGA *vvga = VIRTIO_VGA(dev);
+    vvga->gpu.vdev.enable = 0;
+
+    vga_dirty_log_start(&vvga->vga);
+}
+
+static Property virtio_vga_properties[] = {
+    DEFINE_VIRTIO_GPU_FEATURES(VirtIOVGA, gpu.vdev.conf),
+    DEFINE_VIRTIO_GPU_PCI_FEATURES(VirtIOPCIProxy),
+    DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
+    DEFINE_PROP_UINT32("vgamem_mb", VirtIOVGA, vga.vram_size_mb, 16),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_vga_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
+    dc->props = virtio_vga_properties;
+    dc->reset = virtio_vga_reset;
+
+    k->init = virtio_vga_init;
+    pcidev_k->no_hotplug = 1;
+    pcidev_k->romfile = "vgabios-virtio.bin";
+    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+    pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_GPU;
+    pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
+    pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
+}
+
+static void virtio_vga_inst_initfn(Object *obj)
+{
+    VirtIOVGA *dev = VIRTIO_VGA(obj);
+    object_initialize(&dev->gpu.vdev, sizeof(dev->gpu.vdev), TYPE_VIRTIO_GPU);
+    object_property_add_child(obj, "virtio-backend", OBJECT(&dev->gpu.vdev), NULL);
+}
+
+static TypeInfo virtio_vga_info = {
+    .name          = TYPE_VIRTIO_VGA,
+    .parent        = TYPE_VIRTIO_PCI,
+    .instance_size = sizeof(struct VirtIOVGA),
+    .instance_init = virtio_vga_inst_initfn,
+    .class_init    = virtio_vga_class_init,
+};
+
+static void virgl_register_types(void)
+{
+    type_register_static(&virtio_vga_info);
+}
+
+type_init(virgl_register_types)
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index a98c8a0..32eb43f 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1673,6 +1673,8 @@ PCIDevice *pci_vga_init(PCIBus *bus)
         return pci_create_simple(bus, -1, "VGA");
     case VGA_VMWARE:
         return pci_create_simple(bus, -1, "vmware-svga");
+    case VGA_VIRTIO:
+        return pci_create_simple(bus, -1, "virtio-vga");
     case VGA_NONE:
     default: /* Other non-PCI types. Checking for unsupported types is already
                 done in vl.c. */
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index cd5791e..3523bc9 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -103,7 +103,7 @@ typedef enum DisplayType
 extern int autostart;
 
 typedef enum {
-    VGA_NONE, VGA_STD, VGA_CIRRUS, VGA_VMWARE, VGA_XENFB, VGA_QXL,
+    VGA_NONE, VGA_STD, VGA_CIRRUS, VGA_VMWARE, VGA_XENFB, VGA_QXL, VGA_VIRTIO
 } VGAInterfaceType;
 
 extern int vga_interface_type;
diff --git a/pc-bios/vgabios-virtio.bin b/pc-bios/vgabios-virtio.bin
new file mode 100644
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HcmV?d00001

diff --git a/roms/Makefile b/roms/Makefile
index 10d5a65..882ac32 100644
--- a/roms/Makefile
+++ b/roms/Makefile
@@ -1,5 +1,5 @@
 
-vgabios_variants := stdvga cirrus vmware qxl isavga
+vgabios_variants := stdvga cirrus vmware qxl isavga virtio
 vgabios_targets  := $(subst -isavga,,$(patsubst %,vgabios-%.bin,$(vgabios_variants)))
 pxerom_variants  := e1000 eepro100 ne2k_pci pcnet rtl8139 virtio
 pxerom_targets   := 8086100e 80861209 10500940 10222000 10ec8139 1af41000
diff --git a/roms/config.vga.virtio b/roms/config.vga.virtio
new file mode 100644
index 0000000..9a78983
--- /dev/null
+++ b/roms/config.vga.virtio
@@ -0,0 +1,6 @@
+CONFIG_BUILD_VGABIOS=y
+CONFIG_VGA_BOCHS=y
+CONFIG_VGA_PCI=y
+CONFIG_OVERRIDE_PCI_ID=y
+CONFIG_VGA_VID=0x1af4
+CONFIG_VGA_DID=0x1010
diff --git a/vl.c b/vl.c
index 4ad15b8..de5c40b 100644
--- a/vl.c
+++ b/vl.c
@@ -301,6 +301,7 @@ static struct {
     { .driver = "isa-cirrus-vga",       .flag = &default_vga       },
     { .driver = "vmware-svga",          .flag = &default_vga       },
     { .driver = "qxl-vga",              .flag = &default_vga       },
+    { .driver = "virtio-vga",           .flag = &default_vga       },
 };
 
 static QemuOptsList qemu_rtc_opts = {
@@ -2080,6 +2081,11 @@ static bool qxl_vga_available(void)
     return object_class_by_name("qxl-vga");
 }
 
+static bool virtio_vga_available(void)
+{
+    return object_class_by_name("virtio-vga");
+}
+
 static void select_vgahw (const char *p)
 {
     const char *opts;
@@ -2106,6 +2112,13 @@ static void select_vgahw (const char *p)
             fprintf(stderr, "Error: VMWare SVGA not available\n");
             exit(0);
         }
+    } else if (strstart(p, "virtio", &opts)) {
+        if (virtio_vga_available()) {
+            vga_interface_type = VGA_VIRTIO;
+        } else {
+            fprintf(stderr, "Error: Virtio VGA not available\n");
+            exit(0);
+        }
     } else if (strstart(p, "xenfb", &opts)) {
         vga_interface_type = VGA_XENFB;
     } else if (strstart(p, "qxl", &opts)) {
-- 
1.8.3.1