drivers/gpu/drm/tiny/bochs.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 #include <linux/pci.h>
   4
   5 #include <drm/drm_aperture.h>
   6 #include <drm/drm_atomic_helper.h>
   7 #include <drm/drm_drv.h>
   8 #include <drm/drm_fb_helper.h>
   9 #include <drm/drm_fourcc.h>
  10 #include <drm/drm_gem_framebuffer_helper.h>
  11 #include <drm/drm_gem_vram_helper.h>
  12 #include <drm/drm_managed.h>
  13 #include <drm/drm_module.h>
  14 #include <drm/drm_probe_helper.h>
  15 #include <drm/drm_simple_kms_helper.h>
  16
  17 #include <video/vga.h>
  18
  19 /* ---------------------------------------------------------------------- */
  20
  21 #define VBE_DISPI_IOPORT_INDEX           0x01CE
  22 #define VBE_DISPI_IOPORT_DATA            0x01CF
  23
  24 #define VBE_DISPI_INDEX_ID               0x0
  25 #define VBE_DISPI_INDEX_XRES             0x1
  26 #define VBE_DISPI_INDEX_YRES             0x2
  27 #define VBE_DISPI_INDEX_BPP              0x3
  28 #define VBE_DISPI_INDEX_ENABLE           0x4
  29 #define VBE_DISPI_INDEX_BANK             0x5
  30 #define VBE_DISPI_INDEX_VIRT_WIDTH       0x6
  31 #define VBE_DISPI_INDEX_VIRT_HEIGHT      0x7
  32 #define VBE_DISPI_INDEX_X_OFFSET         0x8
  33 #define VBE_DISPI_INDEX_Y_OFFSET         0x9
  34 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
  35
  36 #define VBE_DISPI_ID0                    0xB0C0
  37 #define VBE_DISPI_ID1                    0xB0C1
  38 #define VBE_DISPI_ID2                    0xB0C2
  39 #define VBE_DISPI_ID3                    0xB0C3
  40 #define VBE_DISPI_ID4                    0xB0C4
  41 #define VBE_DISPI_ID5                    0xB0C5
  42
  43 #define VBE_DISPI_DISABLED               0x00
  44 #define VBE_DISPI_ENABLED                0x01
  45 #define VBE_DISPI_GETCAPS                0x02
  46 #define VBE_DISPI_8BIT_DAC               0x20
  47 #define VBE_DISPI_LFB_ENABLED            0x40
  48 #define VBE_DISPI_NOCLEARMEM             0x80
  49
  50 static int bochs_modeset = -1;
  51 static int defx = 1024;
  52 static int defy = 768;
  53
  54 module_param_named(modeset, bochs_modeset, int, 0444);
  55 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  56
  57 module_param(defx, int, 0444);
  58 module_param(defy, int, 0444);
  59 MODULE_PARM_DESC(defx, "default x resolution");
  60 MODULE_PARM_DESC(defy, "default y resolution");
  61
  62 /* ---------------------------------------------------------------------- */
  63
  64 enum bochs_types {
  65         BOCHS_QEMU_STDVGA,
  66         BOCHS_SIMICS,
  67         BOCHS_UNKNOWN,
  68 };
  69
  70 struct bochs_device {
  71         /* hw */
  72         void __iomem   *mmio;
  73         int            ioports;
  74         void __iomem   *fb_map;
  75         unsigned long  fb_base;
  76         unsigned long  fb_size;
  77         unsigned long  qext_size;
  78
  79         /* mode */
  80         u16 xres;
  81         u16 yres;
  82         u16 yres_virtual;
  83         u32 stride;
  84         u32 bpp;
  85         struct edid *edid;
  86
  87         /* drm */
  88         struct drm_device *dev;
  89         struct drm_simple_display_pipe pipe;
  90         struct drm_connector connector;
  91 };
  92
  93 /* ---------------------------------------------------------------------- */
  94
  95 static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
  96 {
  97         if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
  98                 return;
  99
 100         if (bochs->mmio) {
 101                 int offset = ioport - 0x3c0 + 0x400;
 102
 103                 writeb(val, bochs->mmio + offset);
 104         } else {
 105                 outb(val, ioport);
 106         }
 107 }
 108
 109 static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport)
 110 {
 111         if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
 112                 return 0xff;
 113
 114         if (bochs->mmio) {
 115                 int offset = ioport - 0x3c0 + 0x400;
 116
 117                 return readb(bochs->mmio + offset);
 118         } else {
 119                 return inb(ioport);
 120         }
 121 }
 122
 123 static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
 124 {
 125         u16 ret = 0;
 126
 127         if (bochs->mmio) {
 128                 int offset = 0x500 + (reg << 1);
 129
 130                 ret = readw(bochs->mmio + offset);
 131         } else {
 132                 outw(reg, VBE_DISPI_IOPORT_INDEX);
 133                 ret = inw(VBE_DISPI_IOPORT_DATA);
 134         }
 135         return ret;
 136 }
 137
 138 static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
 139 {
 140         if (bochs->mmio) {
 141                 int offset = 0x500 + (reg << 1);
 142
 143                 writew(val, bochs->mmio + offset);
 144         } else {
 145                 outw(reg, VBE_DISPI_IOPORT_INDEX);
 146                 outw(val, VBE_DISPI_IOPORT_DATA);
 147         }
 148 }
 149
 150 static void bochs_hw_set_big_endian(struct bochs_device *bochs)
 151 {
 152         if (bochs->qext_size < 8)
 153                 return;
 154
 155         writel(0xbebebebe, bochs->mmio + 0x604);
 156 }
 157
 158 static void bochs_hw_set_little_endian(struct bochs_device *bochs)
 159 {
 160         if (bochs->qext_size < 8)
 161                 return;
 162
 163         writel(0x1e1e1e1e, bochs->mmio + 0x604);
 164 }
 165
 166 #ifdef __BIG_ENDIAN
 167 #define bochs_hw_set_native_endian(_b) bochs_hw_set_big_endian(_b)
 168 #else
 169 #define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b)
 170 #endif
 171
 172 static int bochs_get_edid_block(void *data, u8 *buf,
 173                                 unsigned int block, size_t len)
 174 {
 175         struct bochs_device *bochs = data;
 176         size_t i, start = block * EDID_LENGTH;
 177
 178         if (start + len > 0x400 /* vga register offset */)
 179                 return -1;
 180
 181         for (i = 0; i < len; i++)
 182                 buf[i] = readb(bochs->mmio + start + i);
 183
 184         return 0;
 185 }
 186
 187 static int bochs_hw_load_edid(struct bochs_device *bochs)
 188 {
 189         u8 header[8];
 190
 191         if (!bochs->mmio)
 192                 return -1;
 193
 194         /* check header to detect whenever edid support is enabled in qemu */
 195         bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header));
 196         if (drm_edid_header_is_valid(header) != 8)
 197                 return -1;
 198
 199         kfree(bochs->edid);
 200         bochs->edid = drm_do_get_edid(&bochs->connector,
 201                                       bochs_get_edid_block, bochs);
 202         if (bochs->edid == NULL)
 203                 return -1;
 204
 205         return 0;
 206 }
 207
 208 static int bochs_hw_init(struct drm_device *dev)
 209 {
 210         struct bochs_device *bochs = dev->dev_private;
 211         struct pci_dev *pdev = to_pci_dev(dev->dev);
 212         unsigned long addr, size, mem, ioaddr, iosize;
 213         u16 id;
 214
 215         if (pdev->resource[2].flags & IORESOURCE_MEM) {
 216                 /* mmio bar with vga and bochs registers present */
 217                 if (pci_request_region(pdev, 2, "bochs-drm") != 0) {
 218                         DRM_ERROR("Cannot request mmio region\n");
 219                         return -EBUSY;
 220                 }
 221                 ioaddr = pci_resource_start(pdev, 2);
 222                 iosize = pci_resource_len(pdev, 2);
 223                 bochs->mmio = ioremap(ioaddr, iosize);
 224                 if (bochs->mmio == NULL) {
 225                         DRM_ERROR("Cannot map mmio region\n");
 226                         return -ENOMEM;
 227                 }
 228         } else {
 229                 ioaddr = VBE_DISPI_IOPORT_INDEX;
 230                 iosize = 2;
 231                 if (!request_region(ioaddr, iosize, "bochs-drm")) {
 232                         DRM_ERROR("Cannot request ioports\n");
 233                         return -EBUSY;
 234                 }
 235                 bochs->ioports = 1;
 236         }
 237
 238         id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
 239         mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K)
 240                 * 64 * 1024;
 241         if ((id & 0xfff0) != VBE_DISPI_ID0) {
 242                 DRM_ERROR("ID mismatch\n");
 243                 return -ENODEV;
 244         }
 245
 246         if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)
 247                 return -ENODEV;
 248         addr = pci_resource_start(pdev, 0);
 249         size = pci_resource_len(pdev, 0);
 250         if (addr == 0)
 251                 return -ENODEV;
 252         if (size != mem) {
 253                 DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n",
 254                         size, mem);
 255                 size = min(size, mem);
 256         }
 257
 258         if (pci_request_region(pdev, 0, "bochs-drm") != 0)
 259                 DRM_WARN("Cannot request framebuffer, boot fb still active?\n");
 260
 261         bochs->fb_map = ioremap(addr, size);
 262         if (bochs->fb_map == NULL) {
 263                 DRM_ERROR("Cannot map framebuffer\n");
 264                 return -ENOMEM;
 265         }
 266         bochs->fb_base = addr;
 267         bochs->fb_size = size;
 268
 269         DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
 270         DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
 271                  size / 1024, addr,
 272                  bochs->ioports ? "ioports" : "mmio",
 273                  ioaddr);
 274
 275         if (bochs->mmio && pdev->revision >= 2) {
 276                 bochs->qext_size = readl(bochs->mmio + 0x600);
 277                 if (bochs->qext_size < 4 || bochs->qext_size > iosize) {
 278                         bochs->qext_size = 0;
 279                         goto noext;
 280                 }
 281                 DRM_DEBUG("Found qemu ext regs, size %ld\n",
 282                           bochs->qext_size);
 283                 bochs_hw_set_native_endian(bochs);
 284         }
 285
 286 noext:
 287         return 0;
 288 }
 289
 290 static void bochs_hw_fini(struct drm_device *dev)
 291 {
 292         struct bochs_device *bochs = dev->dev_private;
 293
 294         /* TODO: shot down existing vram mappings */
 295
 296         if (bochs->mmio)
 297                 iounmap(bochs->mmio);
 298         if (bochs->ioports)
 299                 release_region(VBE_DISPI_IOPORT_INDEX, 2);
 300         if (bochs->fb_map)
 301                 iounmap(bochs->fb_map);
 302         pci_release_regions(to_pci_dev(dev->dev));
 303         kfree(bochs->edid);
 304 }
 305
 306 static void bochs_hw_blank(struct bochs_device *bochs, bool blank)
 307 {
 308         DRM_DEBUG_DRIVER("hw_blank %d\n", blank);
 309         /* discard ar_flip_flop */
 310         (void)bochs_vga_readb(bochs, VGA_IS1_RC);
 311         /* blank or unblank; we need only update index and set 0x20 */
 312         bochs_vga_writeb(bochs, VGA_ATT_W, blank ? 0 : 0x20);
 313 }
 314
 315 static void bochs_hw_setmode(struct bochs_device *bochs, struct drm_display_mode *mode)
 316 {
 317         int idx;
 318
 319         if (!drm_dev_enter(bochs->dev, &idx))
 320                 return;
 321
 322         bochs->xres = mode->hdisplay;
 323         bochs->yres = mode->vdisplay;
 324         bochs->bpp = 32;
 325         bochs->stride = mode->hdisplay * (bochs->bpp / 8);
 326         bochs->yres_virtual = bochs->fb_size / bochs->stride;
 327
 328         DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
 329                          bochs->xres, bochs->yres, bochs->bpp,
 330                          bochs->yres_virtual);
 331
 332         bochs_hw_blank(bochs, false);
 333
 334         bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,      0);
 335         bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP,         bochs->bpp);
 336         bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES,        bochs->xres);
 337         bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES,        bochs->yres);
 338         bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK,        0);
 339         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH,  bochs->xres);
 340         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT,
 341                           bochs->yres_virtual);
 342         bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET,    0);
 343         bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET,    0);
 344
 345         bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
 346                           VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
 347
 348         drm_dev_exit(idx);
 349 }
 350
 351 static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format)
 352 {
 353         int idx;
 354
 355         if (!drm_dev_enter(bochs->dev, &idx))
 356                 return;
 357
 358         DRM_DEBUG_DRIVER("format %c%c%c%c\n",
 359                          (format->format >>  0) & 0xff,
 360                          (format->format >>  8) & 0xff,
 361                          (format->format >> 16) & 0xff,
 362                          (format->format >> 24) & 0xff);
 363
 364         switch (format->format) {
 365         case DRM_FORMAT_XRGB8888:
 366                 bochs_hw_set_little_endian(bochs);
 367                 break;
 368         case DRM_FORMAT_BGRX8888:
 369                 bochs_hw_set_big_endian(bochs);
 370                 break;
 371         default:
 372                 /* should not happen */
 373                 DRM_ERROR("%s: Huh? Got framebuffer format 0x%x",
 374                           __func__, format->format);
 375                 break;
 376         }
 377
 378         drm_dev_exit(idx);
 379 }
 380
 381 static void bochs_hw_setbase(struct bochs_device *bochs, int x, int y, int stride, u64 addr)
 382 {
 383         unsigned long offset;
 384         unsigned int vx, vy, vwidth, idx;
 385
 386         if (!drm_dev_enter(bochs->dev, &idx))
 387                 return;
 388
 389         bochs->stride = stride;
 390         offset = (unsigned long)addr +
 391                 y * bochs->stride +
 392                 x * (bochs->bpp / 8);
 393         vy = offset / bochs->stride;
 394         vx = (offset % bochs->stride) * 8 / bochs->bpp;
 395         vwidth = stride * 8 / bochs->bpp;
 396
 397         DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
 398                          x, y, addr, offset, vx, vy);
 399         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
 400         bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
 401         bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
 402
 403         drm_dev_exit(idx);
 404 }
 405
 406 /* ---------------------------------------------------------------------- */
 407
 408 static const uint32_t bochs_formats[] = {
 409         DRM_FORMAT_XRGB8888,
 410         DRM_FORMAT_BGRX8888,
 411 };
 412
 413 static void bochs_plane_update(struct bochs_device *bochs, struct drm_plane_state *state)
 414 {
 415         struct drm_gem_vram_object *gbo;
 416         s64 gpu_addr;
 417
 418         if (!state->fb || !bochs->stride)
 419                 return;
 420
 421         gbo = drm_gem_vram_of_gem(state->fb->obj[0]);
 422         gpu_addr = drm_gem_vram_offset(gbo);
 423         if (WARN_ON_ONCE(gpu_addr < 0))
 424                 return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
 425
 426         bochs_hw_setbase(bochs,
 427                          state->crtc_x,
 428                          state->crtc_y,
 429                          state->fb->pitches[0],
 430                          state->fb->offsets[0] + gpu_addr);
 431         bochs_hw_setformat(bochs, state->fb->format);
 432 }
 433
 434 static void bochs_pipe_enable(struct drm_simple_display_pipe *pipe,
 435                               struct drm_crtc_state *crtc_state,
 436                               struct drm_plane_state *plane_state)
 437 {
 438         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 439
 440         bochs_hw_setmode(bochs, &crtc_state->mode);
 441         bochs_plane_update(bochs, plane_state);
 442 }
 443
 444 static void bochs_pipe_disable(struct drm_simple_display_pipe *pipe)
 445 {
 446         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 447
 448         bochs_hw_blank(bochs, true);
 449 }
 450
 451 static void bochs_pipe_update(struct drm_simple_display_pipe *pipe,
 452                               struct drm_plane_state *old_state)
 453 {
 454         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 455
 456         bochs_plane_update(bochs, pipe->plane.state);
 457 }
 458
 459 static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = {
 460         .enable     = bochs_pipe_enable,
 461         .disable    = bochs_pipe_disable,
 462         .update     = bochs_pipe_update,
 463         .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb,
 464         .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb,
 465 };
 466
 467 static int bochs_connector_get_modes(struct drm_connector *connector)
 468 {
 469         struct bochs_device *bochs =
 470                 container_of(connector, struct bochs_device, connector);
 471         int count = 0;
 472
 473         if (bochs->edid)
 474                 count = drm_add_edid_modes(connector, bochs->edid);
 475
 476         if (!count) {
 477                 count = drm_add_modes_noedid(connector, 8192, 8192);
 478                 drm_set_preferred_mode(connector, defx, defy);
 479         }
 480         return count;
 481 }
 482
 483 static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
 484         .get_modes = bochs_connector_get_modes,
 485 };
 486
 487 static const struct drm_connector_funcs bochs_connector_connector_funcs = {
 488         .fill_modes = drm_helper_probe_single_connector_modes,
 489         .destroy = drm_connector_cleanup,
 490         .reset = drm_atomic_helper_connector_reset,
 491         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 492         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 493 };
 494
 495 static void bochs_connector_init(struct drm_device *dev)
 496 {
 497         struct bochs_device *bochs = dev->dev_private;
 498         struct drm_connector *connector = &bochs->connector;
 499
 500         drm_connector_init(dev, connector, &bochs_connector_connector_funcs,
 501                            DRM_MODE_CONNECTOR_VIRTUAL);
 502         drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs);
 503
 504         bochs_hw_load_edid(bochs);
 505         if (bochs->edid) {
 506                 DRM_INFO("Found EDID data blob.\n");
 507                 drm_connector_attach_edid_property(connector);
 508                 drm_connector_update_edid_property(connector, bochs->edid);
 509         }
 510 }
 511
 512 static struct drm_framebuffer *
 513 bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file,
 514                     const struct drm_mode_fb_cmd2 *mode_cmd)
 515 {
 516         if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 &&
 517             mode_cmd->pixel_format != DRM_FORMAT_BGRX8888)
 518                 return ERR_PTR(-EINVAL);
 519
 520         return drm_gem_fb_create(dev, file, mode_cmd);
 521 }
 522
 523 static const struct drm_mode_config_funcs bochs_mode_funcs = {
 524         .fb_create = bochs_gem_fb_create,
 525         .mode_valid = drm_vram_helper_mode_valid,
 526         .atomic_check = drm_atomic_helper_check,
 527         .atomic_commit = drm_atomic_helper_commit,
 528 };
 529
 530 static int bochs_kms_init(struct bochs_device *bochs)
 531 {
 532         int ret;
 533
 534         ret = drmm_mode_config_init(bochs->dev);
 535         if (ret)
 536                 return ret;
 537
 538         bochs->dev->mode_config.max_width = 8192;
 539         bochs->dev->mode_config.max_height = 8192;
 540
 541         bochs->dev->mode_config.fb_base = bochs->fb_base;
 542         bochs->dev->mode_config.preferred_depth = 24;
 543         bochs->dev->mode_config.prefer_shadow = 0;
 544         bochs->dev->mode_config.prefer_shadow_fbdev = 1;
 545         bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;
 546
 547         bochs->dev->mode_config.funcs = &bochs_mode_funcs;
 548
 549         bochs_connector_init(bochs->dev);
 550         drm_simple_display_pipe_init(bochs->dev,
 551                                      &bochs->pipe,
 552                                      &bochs_pipe_funcs,
 553                                      bochs_formats,
 554                                      ARRAY_SIZE(bochs_formats),
 555                                      NULL,
 556                                      &bochs->connector);
 557
 558         drm_mode_config_reset(bochs->dev);
 559
 560         return 0;
 561 }
 562
 563 /* ---------------------------------------------------------------------- */
 564 /* drm interface                                                          */
 565
 566 static int bochs_load(struct drm_device *dev)
 567 {
 568         struct bochs_device *bochs;
 569         int ret;
 570
 571         bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
 572         if (bochs == NULL)
 573                 return -ENOMEM;
 574         dev->dev_private = bochs;
 575         bochs->dev = dev;
 576
 577         ret = bochs_hw_init(dev);
 578         if (ret)
 579                 return ret;
 580
 581         ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size);
 582         if (ret)
 583                 return ret;
 584
 585         ret = bochs_kms_init(bochs);
 586         if (ret)
 587                 return ret;
 588
 589         return 0;
 590 }
 591
 592 DEFINE_DRM_GEM_FOPS(bochs_fops);
 593
 594 static const struct drm_driver bochs_driver = {
 595         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 596         .fops                   = &bochs_fops,
 597         .name                   = "bochs-drm",
 598         .desc                   = "bochs dispi vga interface (qemu stdvga)",
 599         .date                   = "20130925",
 600         .major                  = 1,
 601         .minor                  = 0,
 602         DRM_GEM_VRAM_DRIVER,
 603 };
 604
 605 /* ---------------------------------------------------------------------- */
 606 /* pm interface                                                           */
 607
 608 #ifdef CONFIG_PM_SLEEP
 609 static int bochs_pm_suspend(struct device *dev)
 610 {
 611         struct drm_device *drm_dev = dev_get_drvdata(dev);
 612
 613         return drm_mode_config_helper_suspend(drm_dev);
 614 }
 615
 616 static int bochs_pm_resume(struct device *dev)
 617 {
 618         struct drm_device *drm_dev = dev_get_drvdata(dev);
 619
 620         return drm_mode_config_helper_resume(drm_dev);
 621 }
 622 #endif
 623
 624 static const struct dev_pm_ops bochs_pm_ops = {
 625         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 626                                 bochs_pm_resume)
 627 };
 628
 629 /* ---------------------------------------------------------------------- */
 630 /* pci interface                                                          */
 631
 632 static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 633 {
 634         struct drm_device *dev;
 635         unsigned long fbsize;
 636         int ret;
 637
 638         fbsize = pci_resource_len(pdev, 0);
 639         if (fbsize < 4 * 1024 * 1024) {
 640                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 641                 return -ENOMEM;
 642         }
 643
 644         ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver);
 645         if (ret)
 646                 return ret;
 647
 648         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 649         if (IS_ERR(dev))
 650                 return PTR_ERR(dev);
 651
 652         ret = pcim_enable_device(pdev);
 653         if (ret)
 654                 goto err_free_dev;
 655
 656         pci_set_drvdata(pdev, dev);
 657
 658         ret = bochs_load(dev);
 659         if (ret)
 660                 goto err_free_dev;
 661
 662         ret = drm_dev_register(dev, 0);
 663         if (ret)
 664                 goto err_free_dev;
 665
 666         drm_fbdev_generic_setup(dev, 32);
 667         return ret;
 668
 669 err_free_dev:
 670         drm_dev_put(dev);
 671         return ret;
 672 }
 673
 674 static void bochs_pci_remove(struct pci_dev *pdev)
 675 {
 676         struct drm_device *dev = pci_get_drvdata(pdev);
 677
 678         drm_dev_unplug(dev);
 679         drm_atomic_helper_shutdown(dev);
 680         bochs_hw_fini(dev);
 681         drm_dev_put(dev);
 682 }
 683
 684 static const struct pci_device_id bochs_pci_tbl[] = {
 685         {
 686                 .vendor      = 0x1234,
 687                 .device      = 0x1111,
 688                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 689                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 690                 .driver_data = BOCHS_QEMU_STDVGA,
 691         },
 692         {
 693                 .vendor      = 0x1234,
 694                 .device      = 0x1111,
 695                 .subvendor   = PCI_ANY_ID,
 696                 .subdevice   = PCI_ANY_ID,
 697                 .driver_data = BOCHS_UNKNOWN,
 698         },
 699         {
 700                 .vendor      = 0x4321,
 701                 .device      = 0x1111,
 702                 .subvendor   = PCI_ANY_ID,
 703                 .subdevice   = PCI_ANY_ID,
 704                 .driver_data = BOCHS_SIMICS,
 705         },
 706         { /* end of list */ }
 707 };
 708
 709 static struct pci_driver bochs_pci_driver = {
 710         .name =         "bochs-drm",
 711         .id_table =     bochs_pci_tbl,
 712         .probe =        bochs_pci_probe,
 713         .remove =       bochs_pci_remove,
 714         .driver.pm =    &bochs_pm_ops,
 715 };
 716
 717 /* ---------------------------------------------------------------------- */
 718 /* module init/exit                                                       */
 719
 720 drm_module_pci_driver_if_modeset(bochs_pci_driver, bochs_modeset);
 721
 722 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 723 MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
 724 MODULE_LICENSE("GPL");