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
  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));
 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_idx = 2;
 124     vpci_dev->msix_bar_idx = 4;
 125
 126     if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) {
 127         /*
 128          * with page-per-vq=off there is no padding space we can use
 129          * for the stdvga registers.  Make the common and isr regions
 130          * smaller then.
 131          */
 132         vpci_dev->common.size /= 2;
 133         vpci_dev->isr.size /= 2;
 134     }
 135
 136     offset = memory_region_size(&vpci_dev->modern_bar);
 137     offset -= vpci_dev->notify.size;
 138     vpci_dev->notify.offset = offset;
 139     offset -= vpci_dev->device.size;
 140     vpci_dev->device.offset = offset;
 141     offset -= vpci_dev->isr.size;
 142     vpci_dev->isr.offset = offset;
 143     offset -= vpci_dev->common.size;
 144     vpci_dev->common.offset = offset;
 145
 146     /* init virtio bits */
 147     qdev_set_parent_bus(DEVICE(g), BUS(&vpci_dev->bus));
 148     virtio_pci_force_virtio_1(vpci_dev);
 149     object_property_set_bool(OBJECT(g), true, "realized", &err);
 150     if (err) {
 151         error_propagate(errp, err);
 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_ops, vvga);
 161
 162     for (i = 0; i < g->conf.max_outputs; i++) {
 163         object_property_set_link(OBJECT(g->scanout[i].con),
 164                                  OBJECT(vpci_dev),
 165                                  "device", errp);
 166     }
 167 }
 168
 169 static void virtio_vga_reset(DeviceState *dev)
 170 {
 171     VirtIOVGA *vvga = VIRTIO_VGA(dev);
 172
 173     /* reset virtio-gpu */
 174     virtio_gpu_reset(VIRTIO_DEVICE(&vvga->vdev));
 175
 176     /* reset vga */
 177     vga_common_reset(&vvga->vga);
 178     vga_dirty_log_start(&vvga->vga);
 179 }
 180
 181 static Property virtio_vga_properties[] = {
 182     DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
 183     DEFINE_PROP_END_OF_LIST(),
 184 };
 185
 186 static void virtio_vga_class_init(ObjectClass *klass, void *data)
 187 {
 188     DeviceClass *dc = DEVICE_CLASS(klass);
 189     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
 190     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
 191
 192     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 193     dc->props = virtio_vga_properties;
 194     dc->reset = virtio_vga_reset;
 195     dc->vmsd = &vmstate_virtio_vga;
 196     dc->hotpluggable = false;
 197
 198     k->realize = virtio_vga_realize;
 199     pcidev_k->romfile = "vgabios-virtio.bin";
 200     pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
 201 }
 202
 203 static void virtio_vga_inst_initfn(Object *obj)
 204 {
 205     VirtIOVGA *dev = VIRTIO_VGA(obj);
 206
 207     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
 208                                 TYPE_VIRTIO_GPU);
 209 }
 210
 211 static VirtioPCIDeviceTypeInfo virtio_vga_info = {
 212     .generic_name  = TYPE_VIRTIO_VGA,
 213     .instance_size = sizeof(struct VirtIOVGA),
 214     .instance_init = virtio_vga_inst_initfn,
 215     .class_init    = virtio_vga_class_init,
 216 };
 217
 218 static void virtio_vga_register_types(void)
 219 {
 220     virtio_pci_types_register(&virtio_vga_info);
 221 }
 222
 223 type_init(virtio_vga_register_types)