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 int 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        return g->hw_ops->ui_info(g, idx, info);
  57    }
  58    return -1;
  59}
  60
  61static void virtio_vga_base_gl_block(void *opaque, bool block)
  62{
  63    VirtIOVGABase *vvga = opaque;
  64    VirtIOGPUBase *g = vvga->vgpu;
  65
  66    if (g->hw_ops->gl_block) {
  67        g->hw_ops->gl_block(g, block);
  68    }
  69}
  70
  71static void virtio_vga_base_gl_flushed(void *opaque)
  72{
  73    VirtIOVGABase *vvga = opaque;
  74    VirtIOGPUBase *g = vvga->vgpu;
  75
  76    if (g->hw_ops->gl_flushed) {
  77        g->hw_ops->gl_flushed(g);
  78    }
  79}
  80
  81static int virtio_vga_base_get_flags(void *opaque)
  82{
  83    VirtIOVGABase *vvga = opaque;
  84    VirtIOGPUBase *g = vvga->vgpu;
  85
  86    return g->hw_ops->get_flags(g);
  87}
  88
  89static const GraphicHwOps virtio_vga_base_ops = {
  90    .get_flags = virtio_vga_base_get_flags,
  91    .invalidate = virtio_vga_base_invalidate_display,
  92    .gfx_update = virtio_vga_base_update_display,
  93    .text_update = virtio_vga_base_text_update,
  94    .ui_info = virtio_vga_base_ui_info,
  95    .gl_block = virtio_vga_base_gl_block,
  96    .gl_flushed = virtio_vga_base_gl_flushed,
  97};
  98
  99static const VMStateDescription vmstate_virtio_vga_base = {
 100    .name = "virtio-vga",
 101    .version_id = 2,
 102    .minimum_version_id = 2,
 103    .fields = (VMStateField[]) {
 104        /* no pci stuff here, saving the virtio device will handle that */
 105        VMSTATE_STRUCT(vga, VirtIOVGABase, 0,
 106                       vmstate_vga_common, VGACommonState),
 107        VMSTATE_END_OF_LIST()
 108    }
 109};
 110
 111/* VGA device wrapper around PCI device around virtio GPU */
 112static void virtio_vga_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 113{
 114    VirtIOVGABase *vvga = VIRTIO_VGA_BASE(vpci_dev);
 115    VirtIOGPUBase *g = vvga->vgpu;
 116    VGACommonState *vga = &vvga->vga;
 117    uint32_t offset;
 118    int i;
 119
 120    /* init vga compat bits */
 121    vga->vram_size_mb = 8;
 122    vga_common_init(vga, OBJECT(vpci_dev));
 123    vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
 124             pci_address_space_io(&vpci_dev->pci_dev), true);
 125    pci_register_bar(&vpci_dev->pci_dev, 0,
 126                     PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
 127
 128    /*
 129     * Configure virtio bar and regions
 130     *
 131     * We use bar #2 for the mmio regions, to be compatible with stdvga.
 132     * virtio regions are moved to the end of bar #2, to make room for
 133     * the stdvga mmio registers at the start of bar #2.
 134     */
 135    vpci_dev->modern_mem_bar_idx = 2;
 136    vpci_dev->msix_bar_idx = 4;
 137    vpci_dev->modern_io_bar_idx = 5;
 138
 139    if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
 140        /*
 141         * with page-per-vq=off there is no padding space we can use
 142         * for the stdvga registers.  Make the common and isr regions
 143         * smaller then.
 144         */
 145        vpci_dev->common.size /= 2;
 146        vpci_dev->isr.size /= 2;
 147    }
 148
 149    offset = memory_region_size(&vpci_dev->modern_bar);
 150    offset -= vpci_dev->notify.size;
 151    vpci_dev->notify.offset = offset;
 152    offset -= vpci_dev->device.size;
 153    vpci_dev->device.offset = offset;
 154    offset -= vpci_dev->isr.size;
 155    vpci_dev->isr.offset = offset;
 156    offset -= vpci_dev->common.size;
 157    vpci_dev->common.offset = offset;
 158
 159    /* init virtio bits */
 160    virtio_pci_force_virtio_1(vpci_dev);
 161    if (!qdev_realize(DEVICE(g), BUS(&vpci_dev->bus), errp)) {
 162        return;
 163    }
 164
 165    /* add stdvga mmio regions */
 166    pci_std_vga_mmio_region_init(vga, OBJECT(vvga), &vpci_dev->modern_bar,
 167                                 vvga->vga_mrs, true, false);
 168
 169    vga->con = g->scanout[0].con;
 170    graphic_console_set_hwops(vga->con, &virtio_vga_base_ops, vvga);
 171
 172    for (i = 0; i < g->conf.max_outputs; i++) {
 173        object_property_set_link(OBJECT(g->scanout[i].con), "device",
 174                                 OBJECT(vpci_dev), &error_abort);
 175    }
 176}
 177
 178static void virtio_vga_base_reset(DeviceState *dev)
 179{
 180    VirtIOVGABaseClass *klass = VIRTIO_VGA_BASE_GET_CLASS(dev);
 181    VirtIOVGABase *vvga = VIRTIO_VGA_BASE(dev);
 182
 183    /* reset virtio-gpu */
 184    klass->parent_reset(dev);
 185
 186    /* reset vga */
 187    vga_common_reset(&vvga->vga);
 188    vga_dirty_log_start(&vvga->vga);
 189}
 190
 191static bool virtio_vga_get_big_endian_fb(Object *obj, Error **errp)
 192{
 193    VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
 194
 195    return d->vga.big_endian_fb;
 196}
 197
 198static void virtio_vga_set_big_endian_fb(Object *obj, bool value, Error **errp)
 199{
 200    VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
 201
 202    d->vga.big_endian_fb = value;
 203}
 204
 205static Property virtio_vga_base_properties[] = {
 206    DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 207    DEFINE_PROP_END_OF_LIST(),
 208};
 209
 210static void virtio_vga_base_class_init(ObjectClass *klass, void *data)
 211{
 212    DeviceClass *dc = DEVICE_CLASS(klass);
 213    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 214    VirtIOVGABaseClass *v = VIRTIO_VGA_BASE_CLASS(klass);
 215    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 216
 217    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 218    device_class_set_props(dc, virtio_vga_base_properties);
 219    dc->vmsd = &vmstate_virtio_vga_base;
 220    dc->hotpluggable = false;
 221    device_class_set_parent_reset(dc, virtio_vga_base_reset,
 222                                  &v->parent_reset);
 223
 224    k->realize = virtio_vga_base_realize;
 225    pcidev_k->romfile = "vgabios-virtio.bin";
 226    pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 227
 228    /* Expose framebuffer byteorder via QOM */
 229    object_class_property_add_bool(klass, "big-endian-framebuffer",
 230                                   virtio_vga_get_big_endian_fb,
 231                                   virtio_vga_set_big_endian_fb);
 232}
 233
 234static TypeInfo virtio_vga_base_info = {
 235    .name          = TYPE_VIRTIO_VGA_BASE,
 236    .parent        = TYPE_VIRTIO_PCI,
 237    .instance_size = sizeof(VirtIOVGABase),
 238    .class_size    = sizeof(VirtIOVGABaseClass),
 239    .class_init    = virtio_vga_base_class_init,
 240    .abstract      = true,
 241};
 242
 243#define TYPE_VIRTIO_VGA "virtio-vga"
 244
 245typedef struct VirtIOVGA VirtIOVGA;
 246DECLARE_INSTANCE_CHECKER(VirtIOVGA, VIRTIO_VGA,
 247                         TYPE_VIRTIO_VGA)
 248
 249struct VirtIOVGA {
 250    VirtIOVGABase parent_obj;
 251
 252    VirtIOGPU     vdev;
 253};
 254
 255static void virtio_vga_inst_initfn(Object *obj)
 256{
 257    VirtIOVGA *dev = VIRTIO_VGA(obj);
 258
 259    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 260                                TYPE_VIRTIO_GPU);
 261    VIRTIO_VGA_BASE(dev)->vgpu = VIRTIO_GPU_BASE(&dev->vdev);
 262}
 263
 264
 265static VirtioPCIDeviceTypeInfo virtio_vga_info = {
 266    .generic_name  = TYPE_VIRTIO_VGA,
 267    .parent        = TYPE_VIRTIO_VGA_BASE,
 268    .instance_size = sizeof(VirtIOVGA),
 269    .instance_init = virtio_vga_inst_initfn,
 270};
 271
 272static void virtio_vga_register_types(void)
 273{
 274    type_register_static(&virtio_vga_base_info);
 275    virtio_pci_types_register(&virtio_vga_info);
 276}
 277
 278type_init(virtio_vga_register_types)
 279