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 "qapi/error.h"
   7
   8 /*
   9  * virtio-vga: This extends VirtioPCIProxy.
  10  */
  11 #define TYPE_VIRTIO_VGA "virtio-vga"
  12 #define VIRTIO_VGA(obj) \
  13         OBJECT_CHECK(VirtIOVGA, (obj), TYPE_VIRTIO_VGA)
  14
  15 typedef struct VirtIOVGA {
  16     VirtIOPCIProxy parent_obj;
  17     VirtIOGPU      vdev;
  18     VGACommonState vga;
  19     MemoryRegion   vga_mrs[3];
  20 } VirtIOVGA;
  21
  22 static void virtio_vga_invalidate_display(void *opaque)
  23 {
  24     VirtIOVGA *vvga = opaque;
  25
  26     if (vvga->vdev.enable) {
  27         virtio_gpu_ops.invalidate(&vvga->vdev);
  28     } else {
  29         vvga->vga.hw_ops->invalidate(&vvga->vga);
  30     }
  31 }
  32
  33 static void virtio_vga_update_display(void *opaque)
  34 {
  35     VirtIOVGA *vvga = opaque;
  36
  37     if (vvga->vdev.enable) {
  38         virtio_gpu_ops.gfx_update(&vvga->vdev);
  39     } else {
  40         vvga->vga.hw_ops->gfx_update(&vvga->vga);
  41     }
  42 }
  43
  44 static void virtio_vga_text_update(void *opaque, console_ch_t *chardata)
  45 {
  46     VirtIOVGA *vvga = opaque;
  47
  48     if (vvga->vdev.enable) {
  49         if (virtio_gpu_ops.text_update) {
  50             virtio_gpu_ops.text_update(&vvga->vdev, chardata);
  51         }
  52     } else {
  53         if (vvga->vga.hw_ops->text_update) {
  54             vvga->vga.hw_ops->text_update(&vvga->vga, chardata);
  55         }
  56     }
  57 }
  58
  59 static int virtio_vga_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
  60 {
  61     VirtIOVGA *vvga = opaque;
  62
  63     if (virtio_gpu_ops.ui_info) {
  64         return virtio_gpu_ops.ui_info(&vvga->vdev, idx, info);
  65     }
  66     return -1;
  67 }
  68
  69 static void virtio_vga_gl_block(void *opaque, bool block)
  70 {
  71     VirtIOVGA *vvga = opaque;
  72
  73     if (virtio_gpu_ops.gl_block) {
  74         virtio_gpu_ops.gl_block(&vvga->vdev, block);
  75     }
  76 }
  77
  78 static const GraphicHwOps virtio_vga_ops = {
  79     .invalidate = virtio_vga_invalidate_display,
  80     .gfx_update = virtio_vga_update_display,
  81     .text_update = virtio_vga_text_update,
  82     .ui_info = virtio_vga_ui_info,
  83     .gl_block = virtio_vga_gl_block,
  84 };
  85
  86 static const VMStateDescription vmstate_virtio_vga = {
  87     .name = "virtio-vga",
  88     .version_id = 2,
  89     .minimum_version_id = 2,
  90     .fields = (VMStateField[]) {
  91         /* no pci stuff here, saving the virtio device will handle that */
  92         VMSTATE_STRUCT(vga, VirtIOVGA, 0, vmstate_vga_common, VGACommonState),
  93         VMSTATE_END_OF_LIST()
  94     }
  95 };
  96
  97 /* VGA device wrapper around PCI device around virtio GPU */
  98 static void virtio_vga_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
  99 {
 100     VirtIOVGA *vvga = VIRTIO_VGA(vpci_dev);
 101     VirtIOGPU *g = &vvga->vdev;
 102     VGACommonState *vga = &vvga->vga;
 103     Error *err = NULL;
 104     uint32_t offset;
 105     int i;
 106
 107     /* init vga compat bits */
 108     vga->vram_size_mb = 8;
 109     vga_common_init(vga, OBJECT(vpci_dev));
 110     vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
 111              pci_address_space_io(&vpci_dev->pci_dev), true);
 112     pci_register_bar(&vpci_dev->pci_dev, 0,
 113                      PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram);
 114
 115     /*
 116      * Configure virtio bar and regions
 117      *
 118      * We use bar #2 for the mmio regions, to be compatible with stdvga.
 119      * virtio regions are moved to the end of bar #2, to make room for
 120      * the stdvga mmio registers at the start of bar #2.
 121      */
 122     vpci_dev->modern_mem_bar_idx = 2;
 123     vpci_dev->msix_bar_idx = 4;
 124
 125     if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
 126         /*
 127          * with page-per-vq=off there is no padding space we can use
 128          * for the stdvga registers.  Make the common and isr regions
 129          * smaller then.
 130          */
 131         vpci_dev->common.size /= 2;
 132         vpci_dev->isr.size /= 2;
 133     }
 134
 135     offset = memory_region_size(&vpci_dev->modern_bar);
 136     offset -= vpci_dev->notify.size;
 137     vpci_dev->notify.offset = offset;
 138     offset -= vpci_dev->device.size;
 139     vpci_dev->device.offset = offset;
 140     offset -= vpci_dev->isr.size;
 141     vpci_dev->isr.offset = offset;
 142     offset -= vpci_dev->common.size;
 143     vpci_dev->common.offset = offset;
 144
 145     /* init virtio bits */
 146     qdev_set_parent_bus(DEVICE(g), BUS(&vpci_dev->bus));
 147     virtio_pci_force_virtio_1(vpci_dev);
 148     object_property_set_bool(OBJECT(g), true, "realized", &err);
 149     if (err) {
 150         error_propagate(errp, err);
 151         return;
 152     }
 153
 154     /* add stdvga mmio regions */
 155     pci_std_vga_mmio_region_init(vga, OBJECT(vvga), &vpci_dev->modern_bar,
 156                                  vvga->vga_mrs, true, false);
 157
 158     vga->con = g->scanout[0].con;
 159     graphic_console_set_hwops(vga->con, &virtio_vga_ops, vvga);
 160
 161     for (i = 0; i < g->conf.max_outputs; i++) {
 162         object_property_set_link(OBJECT(g->scanout[i].con),
 163                                  OBJECT(vpci_dev),
 164                                  "device", errp);
 165     }
 166 }
 167
 168 static void virtio_vga_reset(DeviceState *dev)
 169 {
 170     VirtIOVGA *vvga = VIRTIO_VGA(dev);
 171
 172     /* reset virtio-gpu */
 173     virtio_gpu_reset(VIRTIO_DEVICE(&vvga->vdev));
 174
 175     /* reset vga */
 176     vga_common_reset(&vvga->vga);
 177     vga_dirty_log_start(&vvga->vga);
 178 }
 179
 180 static Property virtio_vga_properties[] = {
 181     DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 182     DEFINE_PROP_END_OF_LIST(),
 183 };
 184
 185 static void virtio_vga_class_init(ObjectClass *klass, void *data)
 186 {
 187     DeviceClass *dc = DEVICE_CLASS(klass);
 188     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 189     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 190
 191     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 192     dc->props = virtio_vga_properties;
 193     dc->reset = virtio_vga_reset;
 194     dc->vmsd = &vmstate_virtio_vga;
 195     dc->hotpluggable = false;
 196
 197     k->realize = virtio_vga_realize;
 198     pcidev_k->romfile = "vgabios-virtio.bin";
 199     pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 200 }
 201
 202 static void virtio_vga_inst_initfn(Object *obj)
 203 {
 204     VirtIOVGA *dev = VIRTIO_VGA(obj);
 205
 206     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 207                                 TYPE_VIRTIO_GPU);
 208 }
 209
 210 static VirtioPCIDeviceTypeInfo virtio_vga_info = {
 211     .generic_name  = TYPE_VIRTIO_VGA,
 212     .instance_size = sizeof(struct VirtIOVGA),
 213     .instance_init = virtio_vga_inst_initfn,
 214     .class_init    = virtio_vga_class_init,
 215 };
 216
 217 static void virtio_vga_register_types(void)
 218 {
 219     virtio_pci_types_register(&virtio_vga_info);
 220 }
 221
 222 type_init(virtio_vga_register_types)