virtio-vga.c (7874B)
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 10 static 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 22 static 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 34 static 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 50 static void 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 g->hw_ops->ui_info(g, idx, info); 57 } 58 } 59 60 static void virtio_vga_base_gl_block(void *opaque, bool block) 61 { 62 VirtIOVGABase *vvga = opaque; 63 VirtIOGPUBase *g = vvga->vgpu; 64 65 if (g->hw_ops->gl_block) { 66 g->hw_ops->gl_block(g, block); 67 } 68 } 69 70 static int virtio_vga_base_get_flags(void *opaque) 71 { 72 VirtIOVGABase *vvga = opaque; 73 VirtIOGPUBase *g = vvga->vgpu; 74 75 return g->hw_ops->get_flags(g); 76 } 77 78 static const GraphicHwOps virtio_vga_base_ops = { 79 .get_flags = virtio_vga_base_get_flags, 80 .invalidate = virtio_vga_base_invalidate_display, 81 .gfx_update = virtio_vga_base_update_display, 82 .text_update = virtio_vga_base_text_update, 83 .ui_info = virtio_vga_base_ui_info, 84 .gl_block = virtio_vga_base_gl_block, 85 }; 86 87 static const VMStateDescription vmstate_virtio_vga_base = { 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, VirtIOVGABase, 0, 94 vmstate_vga_common, VGACommonState), 95 VMSTATE_END_OF_LIST() 96 } 97 }; 98 99 /* VGA device wrapper around PCI device around virtio GPU */ 100 static void virtio_vga_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp) 101 { 102 VirtIOVGABase *vvga = VIRTIO_VGA_BASE(vpci_dev); 103 VirtIOGPUBase *g = vvga->vgpu; 104 VGACommonState *vga = &vvga->vga; 105 uint32_t offset; 106 int i; 107 108 /* init vga compat bits */ 109 vga->vram_size_mb = 8; 110 if (!vga_common_init(vga, OBJECT(vpci_dev), errp)) { 111 return; 112 } 113 vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev), 114 pci_address_space_io(&vpci_dev->pci_dev), true); 115 pci_register_bar(&vpci_dev->pci_dev, 0, 116 PCI_BASE_ADDRESS_MEM_PREFETCH, &vga->vram); 117 118 /* 119 * Configure virtio bar and regions 120 * 121 * We use bar #2 for the mmio regions, to be compatible with stdvga. 122 * virtio regions are moved to the end of bar #2, to make room for 123 * the stdvga mmio registers at the start of bar #2. 124 */ 125 vpci_dev->modern_mem_bar_idx = 2; 126 vpci_dev->msix_bar_idx = 4; 127 vpci_dev->modern_io_bar_idx = 5; 128 129 if (!(vpci_dev->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ)) { 130 /* 131 * with page-per-vq=off there is no padding space we can use 132 * for the stdvga registers. Make the common and isr regions 133 * smaller then. 134 */ 135 vpci_dev->common.size /= 2; 136 vpci_dev->isr.size /= 2; 137 } 138 139 offset = memory_region_size(&vpci_dev->modern_bar); 140 offset -= vpci_dev->notify.size; 141 vpci_dev->notify.offset = offset; 142 offset -= vpci_dev->device.size; 143 vpci_dev->device.offset = offset; 144 offset -= vpci_dev->isr.size; 145 vpci_dev->isr.offset = offset; 146 offset -= vpci_dev->common.size; 147 vpci_dev->common.offset = offset; 148 149 /* init virtio bits */ 150 virtio_pci_force_virtio_1(vpci_dev); 151 if (!qdev_realize(DEVICE(g), BUS(&vpci_dev->bus), errp)) { 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_base_ops, vvga); 161 162 for (i = 0; i < g->conf.max_outputs; i++) { 163 object_property_set_link(OBJECT(g->scanout[i].con), "device", 164 OBJECT(vpci_dev), &error_abort); 165 } 166 } 167 168 static void virtio_vga_base_reset(DeviceState *dev) 169 { 170 VirtIOVGABaseClass *klass = VIRTIO_VGA_BASE_GET_CLASS(dev); 171 VirtIOVGABase *vvga = VIRTIO_VGA_BASE(dev); 172 173 /* reset virtio-gpu */ 174 klass->parent_reset(dev); 175 176 /* reset vga */ 177 vga_common_reset(&vvga->vga); 178 vga_dirty_log_start(&vvga->vga); 179 } 180 181 static bool virtio_vga_get_big_endian_fb(Object *obj, Error **errp) 182 { 183 VirtIOVGABase *d = VIRTIO_VGA_BASE(obj); 184 185 return d->vga.big_endian_fb; 186 } 187 188 static void virtio_vga_set_big_endian_fb(Object *obj, bool value, Error **errp) 189 { 190 VirtIOVGABase *d = VIRTIO_VGA_BASE(obj); 191 192 d->vga.big_endian_fb = value; 193 } 194 195 static Property virtio_vga_base_properties[] = { 196 DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy), 197 DEFINE_PROP_END_OF_LIST(), 198 }; 199 200 static void virtio_vga_base_class_init(ObjectClass *klass, void *data) 201 { 202 DeviceClass *dc = DEVICE_CLASS(klass); 203 VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass); 204 VirtIOVGABaseClass *v = VIRTIO_VGA_BASE_CLASS(klass); 205 PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass); 206 207 set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 208 device_class_set_props(dc, virtio_vga_base_properties); 209 dc->vmsd = &vmstate_virtio_vga_base; 210 dc->hotpluggable = false; 211 device_class_set_parent_reset(dc, virtio_vga_base_reset, 212 &v->parent_reset); 213 214 k->realize = virtio_vga_base_realize; 215 pcidev_k->romfile = "vgabios-virtio.bin"; 216 pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA; 217 218 /* Expose framebuffer byteorder via QOM */ 219 object_class_property_add_bool(klass, "big-endian-framebuffer", 220 virtio_vga_get_big_endian_fb, 221 virtio_vga_set_big_endian_fb); 222 } 223 224 static const TypeInfo virtio_vga_base_info = { 225 .name = TYPE_VIRTIO_VGA_BASE, 226 .parent = TYPE_VIRTIO_PCI, 227 .instance_size = sizeof(VirtIOVGABase), 228 .class_size = sizeof(VirtIOVGABaseClass), 229 .class_init = virtio_vga_base_class_init, 230 .abstract = true, 231 }; 232 module_obj(TYPE_VIRTIO_VGA_BASE); 233 module_kconfig(VIRTIO_VGA); 234 235 #define TYPE_VIRTIO_VGA "virtio-vga" 236 237 typedef struct VirtIOVGA VirtIOVGA; 238 DECLARE_INSTANCE_CHECKER(VirtIOVGA, VIRTIO_VGA, 239 TYPE_VIRTIO_VGA) 240 241 struct VirtIOVGA { 242 VirtIOVGABase parent_obj; 243 244 VirtIOGPU vdev; 245 }; 246 247 static void virtio_vga_inst_initfn(Object *obj) 248 { 249 VirtIOVGA *dev = VIRTIO_VGA(obj); 250 251 virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), 252 TYPE_VIRTIO_GPU); 253 VIRTIO_VGA_BASE(dev)->vgpu = VIRTIO_GPU_BASE(&dev->vdev); 254 } 255 256 257 static VirtioPCIDeviceTypeInfo virtio_vga_info = { 258 .generic_name = TYPE_VIRTIO_VGA, 259 .parent = TYPE_VIRTIO_VGA_BASE, 260 .instance_size = sizeof(VirtIOVGA), 261 .instance_init = virtio_vga_inst_initfn, 262 }; 263 module_obj(TYPE_VIRTIO_VGA); 264 265 static void virtio_vga_register_types(void) 266 { 267 type_register_static(&virtio_vga_base_info); 268 virtio_pci_types_register(&virtio_vga_info); 269 } 270 271 type_init(virtio_vga_register_types)