hw/display/vga-pci.c

   1 /*
   2  * QEMU PCI VGA Emulator.
   3  *
   4  * see docs/specs/standard-vga.txt for virtual hardware specs.
   5  *
   6  * Copyright (c) 2003 Fabrice Bellard
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26 #include "hw/hw.h"
  27 #include "ui/console.h"
  28 #include "hw/pci/pci.h"
  29 #include "vga_int.h"
  30 #include "ui/pixel_ops.h"
  31 #include "qemu/timer.h"
  32 #include "hw/loader.h"
  33
  34 #define PCI_VGA_IOPORT_OFFSET 0x400
  35 #define PCI_VGA_IOPORT_SIZE   (0x3e0 - 0x3c0)
  36 #define PCI_VGA_BOCHS_OFFSET  0x500
  37 #define PCI_VGA_BOCHS_SIZE    (0x0b * 2)
  38 #define PCI_VGA_QEXT_OFFSET   0x600
  39 #define PCI_VGA_QEXT_SIZE     (2 * 4)
  40 #define PCI_VGA_MMIO_SIZE     0x1000
  41
  42 #define PCI_VGA_QEXT_REG_SIZE         (0 * 4)
  43 #define PCI_VGA_QEXT_REG_BYTEORDER    (1 * 4)
  44 #define  PCI_VGA_QEXT_LITTLE_ENDIAN   0x1e1e1e1e
  45 #define  PCI_VGA_QEXT_BIG_ENDIAN      0xbebebebe
  46
  47 enum vga_pci_flags {
  48     PCI_VGA_FLAG_ENABLE_MMIO = 1,
  49     PCI_VGA_FLAG_ENABLE_QEXT = 2,
  50 };
  51
  52 typedef struct PCIVGAState {
  53     PCIDevice dev;
  54     VGACommonState vga;
  55     uint32_t flags;
  56     MemoryRegion mmio;
  57     MemoryRegion ioport;
  58     MemoryRegion bochs;
  59     MemoryRegion qext;
  60 } PCIVGAState;
  61
  62 static const VMStateDescription vmstate_vga_pci = {
  63     .name = "vga",
  64     .version_id = 2,
  65     .minimum_version_id = 2,
  66     .fields = (VMStateField[]) {
  67         VMSTATE_PCI_DEVICE(dev, PCIVGAState),
  68         VMSTATE_STRUCT(vga, PCIVGAState, 0, vmstate_vga_common, VGACommonState),
  69         VMSTATE_END_OF_LIST()
  70     }
  71 };
  72
  73 static uint64_t pci_vga_ioport_read(void *ptr, hwaddr addr,
  74                                     unsigned size)
  75 {
  76     PCIVGAState *d = ptr;
  77     uint64_t ret = 0;
  78
  79     switch (size) {
  80     case 1:
  81         ret = vga_ioport_read(&d->vga, addr);
  82         break;
  83     case 2:
  84         ret  = vga_ioport_read(&d->vga, addr);
  85         ret |= vga_ioport_read(&d->vga, addr+1) << 8;
  86         break;
  87     }
  88     return ret;
  89 }
  90
  91 static void pci_vga_ioport_write(void *ptr, hwaddr addr,
  92                                  uint64_t val, unsigned size)
  93 {
  94     PCIVGAState *d = ptr;
  95
  96     switch (size) {
  97     case 1:
  98         vga_ioport_write(&d->vga, addr + 0x3c0, val);
  99         break;
 100     case 2:
 101         /*
 102          * Update bytes in little endian order.  Allows to update
 103          * indexed registers with a single word write because the
 104          * index byte is updated first.
 105          */
 106         vga_ioport_write(&d->vga, addr + 0x3c0, val & 0xff);
 107         vga_ioport_write(&d->vga, addr + 0x3c1, (val >> 8) & 0xff);
 108         break;
 109     }
 110 }
 111
 112 static const MemoryRegionOps pci_vga_ioport_ops = {
 113     .read = pci_vga_ioport_read,
 114     .write = pci_vga_ioport_write,
 115     .valid.min_access_size = 1,
 116     .valid.max_access_size = 4,
 117     .impl.min_access_size = 1,
 118     .impl.max_access_size = 2,
 119     .endianness = DEVICE_LITTLE_ENDIAN,
 120 };
 121
 122 static uint64_t pci_vga_bochs_read(void *ptr, hwaddr addr,
 123                                    unsigned size)
 124 {
 125     PCIVGAState *d = ptr;
 126     int index = addr >> 1;
 127
 128     vbe_ioport_write_index(&d->vga, 0, index);
 129     return vbe_ioport_read_data(&d->vga, 0);
 130 }
 131
 132 static void pci_vga_bochs_write(void *ptr, hwaddr addr,
 133                                 uint64_t val, unsigned size)
 134 {
 135     PCIVGAState *d = ptr;
 136     int index = addr >> 1;
 137
 138     vbe_ioport_write_index(&d->vga, 0, index);
 139     vbe_ioport_write_data(&d->vga, 0, val);
 140 }
 141
 142 static const MemoryRegionOps pci_vga_bochs_ops = {
 143     .read = pci_vga_bochs_read,
 144     .write = pci_vga_bochs_write,
 145     .valid.min_access_size = 1,
 146     .valid.max_access_size = 4,
 147     .impl.min_access_size = 2,
 148     .impl.max_access_size = 2,
 149     .endianness = DEVICE_LITTLE_ENDIAN,
 150 };
 151
 152 static uint64_t pci_vga_qext_read(void *ptr, hwaddr addr, unsigned size)
 153 {
 154     PCIVGAState *d = ptr;
 155
 156     switch (addr) {
 157     case PCI_VGA_QEXT_REG_SIZE:
 158         return PCI_VGA_QEXT_SIZE;
 159     case PCI_VGA_QEXT_REG_BYTEORDER:
 160         return d->vga.big_endian_fb ?
 161             PCI_VGA_QEXT_BIG_ENDIAN : PCI_VGA_QEXT_LITTLE_ENDIAN;
 162     default:
 163         return 0;
 164     }
 165 }
 166
 167 static void pci_vga_qext_write(void *ptr, hwaddr addr,
 168                                uint64_t val, unsigned size)
 169 {
 170     PCIVGAState *d = ptr;
 171
 172     switch (addr) {
 173     case PCI_VGA_QEXT_REG_BYTEORDER:
 174         if (val == PCI_VGA_QEXT_BIG_ENDIAN) {
 175             d->vga.big_endian_fb = true;
 176         }
 177         if (val == PCI_VGA_QEXT_LITTLE_ENDIAN) {
 178             d->vga.big_endian_fb = false;
 179         }
 180         break;
 181     }
 182 }
 183
 184 static const MemoryRegionOps pci_vga_qext_ops = {
 185     .read = pci_vga_qext_read,
 186     .write = pci_vga_qext_write,
 187     .valid.min_access_size = 4,
 188     .valid.max_access_size = 4,
 189     .endianness = DEVICE_LITTLE_ENDIAN,
 190 };
 191
 192 static int pci_std_vga_initfn(PCIDevice *dev)
 193 {
 194     PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
 195     VGACommonState *s = &d->vga;
 196
 197     /* vga + console init */
 198     vga_common_init(s, OBJECT(dev), true);
 199     vga_init(s, OBJECT(dev), pci_address_space(dev), pci_address_space_io(dev),
 200              true);
 201
 202     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
 203
 204     /* XXX: VGA_RAM_SIZE must be a power of two */
 205     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
 206
 207     /* mmio bar for vga register access */
 208     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_MMIO)) {
 209         memory_region_init(&d->mmio, NULL, "vga.mmio", 4096);
 210         memory_region_init_io(&d->ioport, NULL, &pci_vga_ioport_ops, d,
 211                               "vga ioports remapped", PCI_VGA_IOPORT_SIZE);
 212         memory_region_init_io(&d->bochs, NULL, &pci_vga_bochs_ops, d,
 213                               "bochs dispi interface", PCI_VGA_BOCHS_SIZE);
 214
 215         memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET,
 216                                     &d->ioport);
 217         memory_region_add_subregion(&d->mmio, PCI_VGA_BOCHS_OFFSET,
 218                                     &d->bochs);
 219
 220         if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
 221             memory_region_init_io(&d->qext, NULL, &pci_vga_qext_ops, d,
 222                                   "qemu extended regs", PCI_VGA_QEXT_SIZE);
 223             memory_region_add_subregion(&d->mmio, PCI_VGA_QEXT_OFFSET,
 224                                         &d->qext);
 225             pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
 226         }
 227
 228         pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
 229     }
 230
 231     if (!dev->rom_bar) {
 232         /* compatibility with pc-0.13 and older */
 233         vga_init_vbe(s, OBJECT(dev), pci_address_space(dev));
 234     }
 235
 236     return 0;
 237 }
 238
 239 static int pci_secondary_vga_initfn(PCIDevice *dev)
 240 {
 241     PCIVGAState *d = DO_UPCAST(PCIVGAState, dev, dev);
 242     VGACommonState *s = &d->vga;
 243
 244     /* vga + console init */
 245     vga_common_init(s, OBJECT(dev), false);
 246     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
 247
 248     /* mmio bar */
 249     memory_region_init(&d->mmio, OBJECT(dev), "vga.mmio", 4096);
 250     memory_region_init_io(&d->ioport, OBJECT(dev), &pci_vga_ioport_ops, d,
 251                           "vga ioports remapped", PCI_VGA_IOPORT_SIZE);
 252     memory_region_init_io(&d->bochs, OBJECT(dev), &pci_vga_bochs_ops, d,
 253                           "bochs dispi interface", PCI_VGA_BOCHS_SIZE);
 254
 255     memory_region_add_subregion(&d->mmio, PCI_VGA_IOPORT_OFFSET,
 256                                 &d->ioport);
 257     memory_region_add_subregion(&d->mmio, PCI_VGA_BOCHS_OFFSET,
 258                                 &d->bochs);
 259
 260     if (d->flags & (1 << PCI_VGA_FLAG_ENABLE_QEXT)) {
 261         memory_region_init_io(&d->qext, NULL, &pci_vga_qext_ops, d,
 262                               "qemu extended regs", PCI_VGA_QEXT_SIZE);
 263         memory_region_add_subregion(&d->mmio, PCI_VGA_QEXT_OFFSET,
 264                                     &d->qext);
 265         pci_set_byte(&d->dev.config[PCI_REVISION_ID], 2);
 266     }
 267
 268     pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH, &s->vram);
 269     pci_register_bar(&d->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &d->mmio);
 270
 271     return 0;
 272 }
 273
 274 static void pci_secondary_vga_reset(DeviceState *dev)
 275 {
 276     PCIVGAState *d = DO_UPCAST(PCIVGAState, dev.qdev, dev);
 277
 278     vga_common_reset(&d->vga);
 279 }
 280
 281 static Property vga_pci_properties[] = {
 282     DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
 283     DEFINE_PROP_BIT("mmio", PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_MMIO, true),
 284     DEFINE_PROP_BIT("qemu-extended-regs",
 285                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
 286     DEFINE_PROP_END_OF_LIST(),
 287 };
 288
 289 static Property secondary_pci_properties[] = {
 290     DEFINE_PROP_UINT32("vgamem_mb", PCIVGAState, vga.vram_size_mb, 16),
 291     DEFINE_PROP_BIT("qemu-extended-regs",
 292                     PCIVGAState, flags, PCI_VGA_FLAG_ENABLE_QEXT, true),
 293     DEFINE_PROP_END_OF_LIST(),
 294 };
 295
 296 static void vga_class_init(ObjectClass *klass, void *data)
 297 {
 298     DeviceClass *dc = DEVICE_CLASS(klass);
 299     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 300
 301     k->init = pci_std_vga_initfn;
 302     k->romfile = "vgabios-stdvga.bin";
 303     k->vendor_id = PCI_VENDOR_ID_QEMU;
 304     k->device_id = PCI_DEVICE_ID_QEMU_VGA;
 305     k->class_id = PCI_CLASS_DISPLAY_VGA;
 306     dc->vmsd = &vmstate_vga_pci;
 307     dc->props = vga_pci_properties;
 308     dc->hotpluggable = false;
 309     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 310 }
 311
 312 static void secondary_class_init(ObjectClass *klass, void *data)
 313 {
 314     DeviceClass *dc = DEVICE_CLASS(klass);
 315     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 316
 317     k->init = pci_secondary_vga_initfn;
 318     k->vendor_id = PCI_VENDOR_ID_QEMU;
 319     k->device_id = PCI_DEVICE_ID_QEMU_VGA;
 320     k->class_id = PCI_CLASS_DISPLAY_OTHER;
 321     dc->vmsd = &vmstate_vga_pci;
 322     dc->props = secondary_pci_properties;
 323     dc->reset = pci_secondary_vga_reset;
 324 }
 325
 326 static const TypeInfo vga_info = {
 327     .name          = "VGA",
 328     .parent        = TYPE_PCI_DEVICE,
 329     .instance_size = sizeof(PCIVGAState),
 330     .class_init    = vga_class_init,
 331 };
 332
 333 static const TypeInfo secondary_info = {
 334     .name          = "secondary-vga",
 335     .parent        = TYPE_PCI_DEVICE,
 336     .instance_size = sizeof(PCIVGAState),
 337     .class_init    = secondary_class_init,
 338 };
 339
 340 static void vga_register_types(void)
 341 {
 342     type_register_static(&vga_info);
 343     type_register_static(&secondary_info);
 344 }
 345
 346 type_init(vga_register_types)