hw/display/virtio-vga.c

   1 #include "qemu/osdep.h"
   2 #include "hw/hw.h"
   3 #include "hw/pci/pci.h"
   4 #include "ui/console.h"
   5 #include "vga_int.h"
   6 #include "hw/virtio/virtio-pci.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
  16 typedef struct VirtIOVGA {
  17     VirtIOPCIProxy parent_obj;
  18     VirtIOGPU      vdev;
  19     VGACommonState vga;
  20     MemoryRegion   vga_mrs[3];
  21 } VirtIOVGA;
  22
  23 static void virtio_vga_invalidate_display(void *opaque)
  24 {
  25     VirtIOVGA *vvga = opaque;
  26
  27     if (vvga->vdev.enable) {
  28         virtio_gpu_ops.invalidate(&vvga->vdev);
  29     } else {
  30         vvga->vga.hw_ops->invalidate(&vvga->vga);
  31     }
  32 }
  33
  34 static void virtio_vga_update_display(void *opaque)
  35 {
  36     VirtIOVGA *vvga = opaque;
  37
  38     if (vvga->vdev.enable) {
  39         virtio_gpu_ops.gfx_update(&vvga->vdev);
  40     } else {
  41         vvga->vga.hw_ops->gfx_update(&vvga->vga);
  42     }
  43 }
  44
  45 static void virtio_vga_text_update(void *opaque, console_ch_t *chardata)
  46 {
  47     VirtIOVGA *vvga = opaque;
  48
  49     if (vvga->vdev.enable) {
  50         if (virtio_gpu_ops.text_update) {
  51             virtio_gpu_ops.text_update(&vvga->vdev, chardata);
  52         }
  53     } else {
  54         if (vvga->vga.hw_ops->text_update) {
  55             vvga->vga.hw_ops->text_update(&vvga->vga, chardata);
  56         }
  57     }
  58 }
  59
  60 static int virtio_vga_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
  61 {
  62     VirtIOVGA *vvga = opaque;
  63
  64     if (virtio_gpu_ops.ui_info) {
  65         return virtio_gpu_ops.ui_info(&vvga->vdev, idx, info);
  66     }
  67     return -1;
  68 }
  69
  70 static void virtio_vga_gl_block(void *opaque, bool block)
  71 {
  72     VirtIOVGA *vvga = opaque;
  73
  74     if (virtio_gpu_ops.gl_block) {
  75         virtio_gpu_ops.gl_block(&vvga->vdev, block);
  76     }
  77 }
  78
  79 static const GraphicHwOps virtio_vga_ops = {
  80     .invalidate = virtio_vga_invalidate_display,
  81     .gfx_update = virtio_vga_update_display,
  82     .text_update = virtio_vga_text_update,
  83     .ui_info = virtio_vga_ui_info,
  84     .gl_block = virtio_vga_gl_block,
  85 };
  86
  87 static const VMStateDescription vmstate_virtio_vga = {
  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, VirtIOVGA, 0, vmstate_vga_common, VGACommonState),
  94         VMSTATE_END_OF_LIST()
  95     }
  96 };
  97
  98 /* VGA device wrapper around PCI device around virtio GPU */
  99 static void virtio_vga_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 100 {
 101     VirtIOVGA *vvga = VIRTIO_VGA(vpci_dev);
 102     VirtIOGPU *g = &vvga->vdev;
 103     VGACommonState *vga = &vvga->vga;
 104     Error *err = NULL;
 105     uint32_t offset;
 106     int i;
 107
 108     /* init vga compat bits */
 109     vga->vram_size_mb = 8;
 110     vga_common_init(vga, OBJECT(vpci_dev), false);
 111     vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
 112              pci_address_space_io(&vpci_dev->pci_dev), true);
 113     pci_register_bar(&vpci_dev->pci_dev, 0,
 114                      PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
 115
 116     /*
 117      * Configure virtio bar and regions
 118      *
 119      * We use bar #2 for the mmio regions, to be compatible with stdvga.
 120      * virtio regions are moved to the end of bar #2, to make room for
 121      * the stdvga mmio registers at the start of bar #2.
 122      */
 123     vpci_dev->modern_mem_bar = 2;
 124     vpci_dev->msix_bar = 4;
 125     offset = memory_region_size(&vpci_dev->modern_bar);
 126     offset -= vpci_dev->notify.size;
 127     vpci_dev->notify.offset = offset;
 128     offset -= vpci_dev->device.size;
 129     vpci_dev->device.offset = offset;
 130     offset -= vpci_dev->isr.size;
 131     vpci_dev->isr.offset = offset;
 132     offset -= vpci_dev->common.size;
 133     vpci_dev->common.offset = offset;
 134
 135     /* init virtio bits */
 136     qdev_set_parent_bus(DEVICE(g), BUS(&vpci_dev->bus));
 137     virtio_pci_force_virtio_1(vpci_dev);
 138     object_property_set_bool(OBJECT(g), true, "realized", &err);
 139     if (err) {
 140         error_propagate(errp, err);
 141         return;
 142     }
 143
 144     /* add stdvga mmio regions */
 145     pci_std_vga_mmio_region_init(vga, &vpci_dev->modern_bar,
 146                                  vvga->vga_mrs, true);
 147
 148     vga->con = g->scanout[0].con;
 149     graphic_console_set_hwops(vga->con, &virtio_vga_ops, vvga);
 150
 151     for (i = 0; i < g->conf.max_outputs; i++) {
 152         object_property_set_link(OBJECT(g->scanout[i].con),
 153                                  OBJECT(vpci_dev),
 154                                  "device", errp);
 155     }
 156 }
 157
 158 static void virtio_vga_reset(DeviceState *dev)
 159 {
 160     VirtIOVGA *vvga = VIRTIO_VGA(dev);
 161     vvga->vdev.enable = 0;
 162
 163     vga_dirty_log_start(&vvga->vga);
 164 }
 165
 166 static Property virtio_vga_properties[] = {
 167     DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 168     DEFINE_PROP_END_OF_LIST(),
 169 };
 170
 171 static void virtio_vga_class_init(ObjectClass *klass, void *data)
 172 {
 173     DeviceClass *dc = DEVICE_CLASS(klass);
 174     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 175     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 176
 177     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 178     dc->props = virtio_vga_properties;
 179     dc->reset = virtio_vga_reset;
 180     dc->vmsd = &vmstate_virtio_vga;
 181     dc->hotpluggable = false;
 182
 183     k->realize = virtio_vga_realize;
 184     pcidev_k->romfile = "vgabios-virtio.bin";
 185     pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 186 }
 187
 188 static void virtio_vga_inst_initfn(Object *obj)
 189 {
 190     VirtIOVGA *dev = VIRTIO_VGA(obj);
 191
 192     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 193                                 TYPE_VIRTIO_GPU);
 194 }
 195
 196 static TypeInfo virtio_vga_info = {
 197     .name          = TYPE_VIRTIO_VGA,
 198     .parent        = TYPE_VIRTIO_PCI,
 199     .instance_size = sizeof(struct VirtIOVGA),
 200     .instance_init = virtio_vga_inst_initfn,
 201     .class_init    = virtio_vga_class_init,
 202 };
 203
 204 static void virtio_vga_register_types(void)
 205 {
 206     type_register_static(&virtio_vga_info);
 207 }
 208
 209 type_init(virtio_vga_register_types)