qemu/hw/display/virtio-vga.c
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   1#include "qemu/osdep.h"
   2#include "hw/pci/pci.h"
   3#include "hw/qdev-properties.h"
   4#include "hw/virtio/virtio-gpu.h"
   5#include "qapi/error.h"
   6#include "qemu/module.h"
   7#include "virtio-vga.h"
   8#include "qom/object.h"
   9
  10static void virtio_vga_base_invalidate_display(void *opaque)
  11{
  12    VirtIOVGABase *vvga = opaque;
  13    VirtIOGPUBase *g = vvga->vgpu;
  14
  15    if (g->enable) {
  16        g->hw_ops->invalidate(g);
  17    } else {
  18        vvga->vga.hw_ops->invalidate(&vvga->vga);
  19    }
  20}
  21
  22static void virtio_vga_base_update_display(void *opaque)
  23{
  24    VirtIOVGABase *vvga = opaque;
  25    VirtIOGPUBase *g = vvga->vgpu;
  26
  27    if (g->enable) {
  28        g->hw_ops->gfx_update(g);
  29    } else {
  30        vvga->vga.hw_ops->gfx_update(&vvga->vga);
  31    }
  32}
  33
  34static void virtio_vga_base_text_update(void *opaque, console_ch_t *chardata)
  35{
  36    VirtIOVGABase *vvga = opaque;
  37    VirtIOGPUBase *g = vvga->vgpu;
  38
  39    if (g->enable) {
  40        if (g->hw_ops->text_update) {
  41            g->hw_ops->text_update(g, chardata);
  42        }
  43    } else {
  44        if (vvga->vga.hw_ops->text_update) {
  45            vvga->vga.hw_ops->text_update(&vvga->vga, chardata);
  46        }
  47    }
  48}
  49
  50static void virtio_vga_base_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
  51{
  52    VirtIOVGABase *vvga = opaque;
  53    VirtIOGPUBase *g = vvga->vgpu;
  54
  55    if (g->hw_ops->ui_info) {
  56        g->hw_ops->ui_info(g, idx, info);
  57    }
  58}
  59
  60static void virtio_vga_base_gl_block(void *opaque, bool block)
  61{
  62    VirtIOVGABase *vvga = opaque;
  63    VirtIOGPUBase *g = vvga->vgpu;
  64
  65    if (g->hw_ops->gl_block) {
  66        g->hw_ops->gl_block(g, block);
  67    }
  68}
  69
  70static int virtio_vga_base_get_flags(void *opaque)
  71{
  72    VirtIOVGABase *vvga = opaque;
  73    VirtIOGPUBase *g = vvga->vgpu;
  74
  75    return g->hw_ops->get_flags(g);
  76}
  77
  78static const GraphicHwOps virtio_vga_base_ops = {
  79    .get_flags = virtio_vga_base_get_flags,
  80    .invalidate = virtio_vga_base_invalidate_display,
  81    .gfx_update = virtio_vga_base_update_display,
  82    .text_update = virtio_vga_base_text_update,
  83    .ui_info = virtio_vga_base_ui_info,
  84    .gl_block = virtio_vga_base_gl_block,
  85};
  86
  87static const VMStateDescription vmstate_virtio_vga_base = {
  88    .name = "virtio-vga",
  89    .version_id = 2,
  90    .minimum_version_id = 2,
  91    .fields = (VMStateField[]) {
  92        /* no pci stuff here, saving the virtio device will handle that */
  93        VMSTATE_STRUCT(vga, VirtIOVGABase, 0,
  94                       vmstate_vga_common, VGACommonState),
  95        VMSTATE_END_OF_LIST()
  96    }
  97};
  98
  99/* VGA device wrapper around PCI device around virtio GPU */
 100static void virtio_vga_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 101{
 102    VirtIOVGABase *vvga = VIRTIO_VGA_BASE(vpci_dev);
 103    VirtIOGPUBase *g = vvga->vgpu;
 104    VGACommonState *vga = &vvga->vga;
 105    uint32_t offset;
 106    int i;
 107
 108    /* init vga compat bits */
 109    vga->vram_size_mb = 8;
 110    if (!vga_common_init(vga, OBJECT(vpci_dev), errp)) {
 111        return;
 112    }
 113    vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
 114             pci_address_space_io(&vpci_dev->pci_dev), true);
 115    pci_register_bar(&vpci_dev->pci_dev, 0,
 116                     PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
 117
 118    /*
 119     * Configure virtio bar and regions
 120     *
 121     * We use bar #2 for the mmio regions, to be compatible with stdvga.
 122     * virtio regions are moved to the end of bar #2, to make room for
 123     * the stdvga mmio registers at the start of bar #2.
 124     */
 125    vpci_dev->modern_mem_bar_idx = 2;
 126    vpci_dev->msix_bar_idx = 4;
 127    vpci_dev->modern_io_bar_idx = 5;
 128
 129    if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
 130        /*
 131         * with page-per-vq=off there is no padding space we can use
 132         * for the stdvga registers.  Make the common and isr regions
 133         * smaller then.
 134         */
 135        vpci_dev->common.size /= 2;
 136        vpci_dev->isr.size /= 2;
 137    }
 138
 139    offset = memory_region_size(&vpci_dev->modern_bar);
 140    offset -= vpci_dev->notify.size;
 141    vpci_dev->notify.offset = offset;
 142    offset -= vpci_dev->device.size;
 143    vpci_dev->device.offset = offset;
 144    offset -= vpci_dev->isr.size;
 145    vpci_dev->isr.offset = offset;
 146    offset -= vpci_dev->common.size;
 147    vpci_dev->common.offset = offset;
 148
 149    /* init virtio bits */
 150    virtio_pci_force_virtio_1(vpci_dev);
 151    if (!qdev_realize(DEVICE(g), BUS(&vpci_dev->bus), errp)) {
 152        return;
 153    }
 154
 155    /* add stdvga mmio regions */
 156    pci_std_vga_mmio_region_init(vga, OBJECT(vvga), &vpci_dev->modern_bar,
 157                                 vvga->vga_mrs, true, false);
 158
 159    vga->con = g->scanout[0].con;
 160    graphic_console_set_hwops(vga->con, &virtio_vga_base_ops, vvga);
 161
 162    for (i = 0; i < g->conf.max_outputs; i++) {
 163        object_property_set_link(OBJECT(g->scanout[i].con), "device",
 164                                 OBJECT(vpci_dev), &error_abort);
 165    }
 166}
 167
 168static void virtio_vga_base_reset(DeviceState *dev)
 169{
 170    VirtIOVGABaseClass *klass = VIRTIO_VGA_BASE_GET_CLASS(dev);
 171    VirtIOVGABase *vvga = VIRTIO_VGA_BASE(dev);
 172
 173    /* reset virtio-gpu */
 174    klass->parent_reset(dev);
 175
 176    /* reset vga */
 177    vga_common_reset(&vvga->vga);
 178    vga_dirty_log_start(&vvga->vga);
 179}
 180
 181static bool virtio_vga_get_big_endian_fb(Object *obj, Error **errp)
 182{
 183    VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
 184
 185    return d->vga.big_endian_fb;
 186}
 187
 188static void virtio_vga_set_big_endian_fb(Object *obj, bool value, Error **errp)
 189{
 190    VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
 191
 192    d->vga.big_endian_fb = value;
 193}
 194
 195static Property virtio_vga_base_properties[] = {
 196    DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 197    DEFINE_PROP_END_OF_LIST(),
 198};
 199
 200static void virtio_vga_base_class_init(ObjectClass *klass, void *data)
 201{
 202    DeviceClass *dc = DEVICE_CLASS(klass);
 203    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 204    VirtIOVGABaseClass *v = VIRTIO_VGA_BASE_CLASS(klass);
 205    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 206
 207    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 208    device_class_set_props(dc, virtio_vga_base_properties);
 209    dc->vmsd = &vmstate_virtio_vga_base;
 210    dc->hotpluggable = false;
 211    device_class_set_parent_reset(dc, virtio_vga_base_reset,
 212                                  &v->parent_reset);
 213
 214    k->realize = virtio_vga_base_realize;
 215    pcidev_k->romfile = "vgabios-virtio.bin";
 216    pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 217
 218    /* Expose framebuffer byteorder via QOM */
 219    object_class_property_add_bool(klass, "big-endian-framebuffer",
 220                                   virtio_vga_get_big_endian_fb,
 221                                   virtio_vga_set_big_endian_fb);
 222}
 223
 224static const TypeInfo virtio_vga_base_info = {
 225    .name          = TYPE_VIRTIO_VGA_BASE,
 226    .parent        = TYPE_VIRTIO_PCI,
 227    .instance_size = sizeof(VirtIOVGABase),
 228    .class_size    = sizeof(VirtIOVGABaseClass),
 229    .class_init    = virtio_vga_base_class_init,
 230    .abstract      = true,
 231};
 232module_obj(TYPE_VIRTIO_VGA_BASE);
 233module_kconfig(VIRTIO_VGA);
 234
 235#define TYPE_VIRTIO_VGA "virtio-vga"
 236
 237typedef struct VirtIOVGA VirtIOVGA;
 238DECLARE_INSTANCE_CHECKER(VirtIOVGA, VIRTIO_VGA,
 239                         TYPE_VIRTIO_VGA)
 240
 241struct VirtIOVGA {
 242    VirtIOVGABase parent_obj;
 243
 244    VirtIOGPU     vdev;
 245};
 246
 247static void virtio_vga_inst_initfn(Object *obj)
 248{
 249    VirtIOVGA *dev = VIRTIO_VGA(obj);
 250
 251    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 252                                TYPE_VIRTIO_GPU);
 253    VIRTIO_VGA_BASE(dev)->vgpu = VIRTIO_GPU_BASE(&dev->vdev);
 254}
 255
 256
 257static VirtioPCIDeviceTypeInfo virtio_vga_info = {
 258    .generic_name  = TYPE_VIRTIO_VGA,
 259    .parent        = TYPE_VIRTIO_VGA_BASE,
 260    .instance_size = sizeof(VirtIOVGA),
 261    .instance_init = virtio_vga_inst_initfn,
 262};
 263module_obj(TYPE_VIRTIO_VGA);
 264
 265static void virtio_vga_register_types(void)
 266{
 267    type_register_static(&virtio_vga_base_info);
 268    virtio_pci_types_register(&virtio_vga_info);
 269}
 270
 271type_init(virtio_vga_register_types)
 272