LXR qemu/hw/display/virtio-vga.c

   1#include "qemu/osdep.h"
   2#include "hw/hw.h"
   3#include "hw/pci/pci.h"
   4#include "vga_int.h"
   5#include "hw/virtio/virtio-pci.h"
   6#include "hw/virtio/virtio-gpu.h"
   7#include "qapi/error.h"
   8
   9/*
  10 * virtio-vga: This extends VirtioPCIProxy.
  11 */
  12#define TYPE_VIRTIO_VGA "virtio-vga"
  13#define VIRTIO_VGA(obj) \
  14        OBJECT_CHECK(VirtIOVGA, (obj), TYPE_VIRTIO_VGA)
  15#define VIRTIO_VGA_GET_CLASS(obj) \
  16        OBJECT_GET_CLASS(VirtIOVGAClass, obj, TYPE_VIRTIO_VGA)
  17#define VIRTIO_VGA_CLASS(klass) \
  18        OBJECT_CLASS_CHECK(VirtIOVGAClass, klass, TYPE_VIRTIO_VGA)
  19
  20typedef struct VirtIOVGA {
  21    VirtIOPCIProxy parent_obj;
  22    VirtIOGPU      vdev;
  23    VGACommonState vga;
  24    MemoryRegion   vga_mrs[3];
  25} VirtIOVGA;
  26
  27typedef struct VirtIOVGAClass {
  28    VirtioPCIClass parent_class;
  29    DeviceReset parent_reset;
  30} VirtIOVGAClass;
  31
  32static void virtio_vga_invalidate_display(void *opaque)
  33{
  34    VirtIOVGA *vvga = opaque;
  35
  36    if (vvga->vdev.enable) {
  37        virtio_gpu_ops.invalidate(&vvga->vdev);
  38    } else {
  39        vvga->vga.hw_ops->invalidate(&vvga->vga);
  40    }
  41}
  42
  43static void virtio_vga_update_display(void *opaque)
  44{
  45    VirtIOVGA *vvga = opaque;
  46
  47    if (vvga->vdev.enable) {
  48        virtio_gpu_ops.gfx_update(&vvga->vdev);
  49    } else {
  50        vvga->vga.hw_ops->gfx_update(&vvga->vga);
  51    }
  52}
  53
  54static void virtio_vga_text_update(void *opaque, console_ch_t *chardata)
  55{
  56    VirtIOVGA *vvga = opaque;
  57
  58    if (vvga->vdev.enable) {
  59        if (virtio_gpu_ops.text_update) {
  60            virtio_gpu_ops.text_update(&vvga->vdev, chardata);
  61        }
  62    } else {
  63        if (vvga->vga.hw_ops->text_update) {
  64            vvga->vga.hw_ops->text_update(&vvga->vga, chardata);
  65        }
  66    }
  67}
  68
  69static int virtio_vga_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
  70{
  71    VirtIOVGA *vvga = opaque;
  72
  73    if (virtio_gpu_ops.ui_info) {
  74        return virtio_gpu_ops.ui_info(&vvga->vdev, idx, info);
  75    }
  76    return -1;
  77}
  78
  79static void virtio_vga_gl_block(void *opaque, bool block)
  80{
  81    VirtIOVGA *vvga = opaque;
  82
  83    if (virtio_gpu_ops.gl_block) {
  84        virtio_gpu_ops.gl_block(&vvga->vdev, block);
  85    }
  86}
  87
  88static const GraphicHwOps virtio_vga_ops = {
  89    .invalidate = virtio_vga_invalidate_display,
  90    .gfx_update = virtio_vga_update_display,
  91    .text_update = virtio_vga_text_update,
  92    .ui_info = virtio_vga_ui_info,
  93    .gl_block = virtio_vga_gl_block,
  94};
  95
  96static const VMStateDescription vmstate_virtio_vga = {
  97    .name = "virtio-vga",
  98    .version_id = 2,
  99    .minimum_version_id = 2,
 100    .fields = (VMStateField[]) {
 101        /* no pci stuff here, saving the virtio device will handle that */
 102        VMSTATE_STRUCT(vga, VirtIOVGA, 0, vmstate_vga_common, VGACommonState),
 103        VMSTATE_END_OF_LIST()
 104    }
 105};
 106
 107/* VGA device wrapper around PCI device around virtio GPU */
 108static void virtio_vga_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 109{
 110    VirtIOVGA *vvga = VIRTIO_VGA(vpci_dev);
 111    VirtIOGPU *g = &vvga->vdev;
 112    VGACommonState *vga = &vvga->vga;
 113    Error *err = NULL;
 114    uint32_t offset;
 115    int i;
 116
 117    /* init vga compat bits */
 118    vga->vram_size_mb = 8;
 119    vga_common_init(vga, OBJECT(vpci_dev));
 120    vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
 121             pci_address_space_io(&vpci_dev->pci_dev), true);
 122    pci_register_bar(&vpci_dev->pci_dev, 0,
 123                     PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
 124
 125    /*
 126     * Configure virtio bar and regions
 127     *
 128     * We use bar #2 for the mmio regions, to be compatible with stdvga.
 129     * virtio regions are moved to the end of bar #2, to make room for
 130     * the stdvga mmio registers at the start of bar #2.
 131     */
 132    vpci_dev->modern_mem_bar_idx = 2;
 133    vpci_dev->msix_bar_idx = 4;
 134
 135    if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
 136        /*
 137         * with page-per-vq=off there is no padding space we can use
 138         * for the stdvga registers.  Make the common and isr regions
 139         * smaller then.
 140         */
 141        vpci_dev->common.size /= 2;
 142        vpci_dev->isr.size /= 2;
 143    }
 144
 145    offset = memory_region_size(&vpci_dev->modern_bar);
 146    offset -= vpci_dev->notify.size;
 147    vpci_dev->notify.offset = offset;
 148    offset -= vpci_dev->device.size;
 149    vpci_dev->device.offset = offset;
 150    offset -= vpci_dev->isr.size;
 151    vpci_dev->isr.offset = offset;
 152    offset -= vpci_dev->common.size;
 153    vpci_dev->common.offset = offset;
 154
 155    /* init virtio bits */
 156    qdev_set_parent_bus(DEVICE(g), BUS(&vpci_dev->bus));
 157    virtio_pci_force_virtio_1(vpci_dev);
 158    object_property_set_bool(OBJECT(g), true, "realized", &err);
 159    if (err) {
 160        error_propagate(errp, err);
 161        return;
 162    }
 163
 164    /* add stdvga mmio regions */
 165    pci_std_vga_mmio_region_init(vga, OBJECT(vvga), &vpci_dev->modern_bar,
 166                                 vvga->vga_mrs, true, false);
 167
 168    vga->con = g->scanout[0].con;
 169    graphic_console_set_hwops(vga->con, &virtio_vga_ops, vvga);
 170
 171    for (i = 0; i < g->conf.max_outputs; i++) {
 172        object_property_set_link(OBJECT(g->scanout[i].con),
 173                                 OBJECT(vpci_dev),
 174                                 "device", errp);
 175    }
 176}
 177
 178static void virtio_vga_reset(DeviceState *dev)
 179{
 180    VirtIOVGAClass *klass = VIRTIO_VGA_GET_CLASS(dev);
 181    VirtIOVGA *vvga = VIRTIO_VGA(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 Property virtio_vga_properties[] = {
 192    DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 193    DEFINE_PROP_END_OF_LIST(),
 194};
 195
 196static void virtio_vga_class_init(ObjectClass *klass, void *data)
 197{
 198    DeviceClass *dc = DEVICE_CLASS(klass);
 199    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 200    VirtIOVGAClass *v = VIRTIO_VGA_CLASS(klass);
 201    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 202
 203    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 204    dc->props = virtio_vga_properties;
 205    dc->vmsd = &vmstate_virtio_vga;
 206    dc->hotpluggable = false;
 207    device_class_set_parent_reset(dc, virtio_vga_reset,
 208                                  &v->parent_reset);
 209
 210    k->realize = virtio_vga_realize;
 211    pcidev_k->romfile = "vgabios-virtio.bin";
 212    pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 213}
 214
 215static void virtio_vga_inst_initfn(Object *obj)
 216{
 217    VirtIOVGA *dev = VIRTIO_VGA(obj);
 218
 219    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 220                                TYPE_VIRTIO_GPU);
 221}
 222
 223static VirtioPCIDeviceTypeInfo virtio_vga_info = {
 224    .generic_name  = TYPE_VIRTIO_VGA,
 225    .instance_size = sizeof(struct VirtIOVGA),
 226    .instance_init = virtio_vga_inst_initfn,
 227    .class_size    = sizeof(struct VirtIOVGAClass),
 228    .class_init    = virtio_vga_class_init,
 229};
 230
 231static void virtio_vga_register_types(void)
 232{
 233    virtio_pci_types_register(&virtio_vga_info);
 234}
 235
 236type_init(virtio_vga_register_types)
 237