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_probe_helper.h>
  14 #include <drm/drm_simple_kms_helper.h>
  15
  16 #include <video/vga.h>
  17
  18 /* ---------------------------------------------------------------------- */
  19
  20 #define VBE_DISPI_IOPORT_INDEX           0x01CE
  21 #define VBE_DISPI_IOPORT_DATA            0x01CF
  22
  23 #define VBE_DISPI_INDEX_ID               0x0
  24 #define VBE_DISPI_INDEX_XRES             0x1
  25 #define VBE_DISPI_INDEX_YRES             0x2
  26 #define VBE_DISPI_INDEX_BPP              0x3
  27 #define VBE_DISPI_INDEX_ENABLE           0x4
  28 #define VBE_DISPI_INDEX_BANK             0x5
  29 #define VBE_DISPI_INDEX_VIRT_WIDTH       0x6
  30 #define VBE_DISPI_INDEX_VIRT_HEIGHT      0x7
  31 #define VBE_DISPI_INDEX_X_OFFSET         0x8
  32 #define VBE_DISPI_INDEX_Y_OFFSET         0x9
  33 #define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
  34
  35 #define VBE_DISPI_ID0                    0xB0C0
  36 #define VBE_DISPI_ID1                    0xB0C1
  37 #define VBE_DISPI_ID2                    0xB0C2
  38 #define VBE_DISPI_ID3                    0xB0C3
  39 #define VBE_DISPI_ID4                    0xB0C4
  40 #define VBE_DISPI_ID5                    0xB0C5
  41
  42 #define VBE_DISPI_DISABLED               0x00
  43 #define VBE_DISPI_ENABLED                0x01
  44 #define VBE_DISPI_GETCAPS                0x02
  45 #define VBE_DISPI_8BIT_DAC               0x20
  46 #define VBE_DISPI_LFB_ENABLED            0x40
  47 #define VBE_DISPI_NOCLEARMEM             0x80
  48
  49 static int bochs_modeset = -1;
  50 static int defx = 1024;
  51 static int defy = 768;
  52
  53 module_param_named(modeset, bochs_modeset, int, 0444);
  54 MODULE_PARM_DESC(modeset, "enable/disable kernel modesetting");
  55
  56 module_param(defx, int, 0444);
  57 module_param(defy, int, 0444);
  58 MODULE_PARM_DESC(defx, "default x resolution");
  59 MODULE_PARM_DESC(defy, "default y resolution");
  60
  61 /* ---------------------------------------------------------------------- */
  62
  63 enum bochs_types {
  64         BOCHS_QEMU_STDVGA,
  65         BOCHS_SIMICS,
  66         BOCHS_UNKNOWN,
  67 };
  68
  69 struct bochs_device {
  70         /* hw */
  71         void __iomem   *mmio;
  72         int            ioports;
  73         void __iomem   *fb_map;
  74         unsigned long  fb_base;
  75         unsigned long  fb_size;
  76         unsigned long  qext_size;
  77
  78         /* mode */
  79         u16 xres;
  80         u16 yres;
  81         u16 yres_virtual;
  82         u32 stride;
  83         u32 bpp;
  84         struct edid *edid;
  85
  86         /* drm */
  87         struct drm_device *dev;
  88         struct drm_simple_display_pipe pipe;
  89         struct drm_connector connector;
  90 };
  91
  92 /* ---------------------------------------------------------------------- */
  93
  94 static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
  95 {
  96         if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
  97                 return;
  98
  99         if (bochs->mmio) {
 100                 int offset = ioport - 0x3c0 + 0x400;
 101
 102                 writeb(val, bochs->mmio + offset);
 103         } else {
 104                 outb(val, ioport);
 105         }
 106 }
 107
 108 static u8 bochs_vga_readb(struct bochs_device *bochs, u16 ioport)
 109 {
 110         if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
 111                 return 0xff;
 112
 113         if (bochs->mmio) {
 114                 int offset = ioport - 0x3c0 + 0x400;
 115
 116                 return readb(bochs->mmio + offset);
 117         } else {
 118                 return inb(ioport);
 119         }
 120 }
 121
 122 static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
 123 {
 124         u16 ret = 0;
 125
 126         if (bochs->mmio) {
 127                 int offset = 0x500 + (reg << 1);
 128
 129                 ret = readw(bochs->mmio + offset);
 130         } else {
 131                 outw(reg, VBE_DISPI_IOPORT_INDEX);
 132                 ret = inw(VBE_DISPI_IOPORT_DATA);
 133         }
 134         return ret;
 135 }
 136
 137 static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
 138 {
 139         if (bochs->mmio) {
 140                 int offset = 0x500 + (reg << 1);
 141
 142                 writew(val, bochs->mmio + offset);
 143         } else {
 144                 outw(reg, VBE_DISPI_IOPORT_INDEX);
 145                 outw(val, VBE_DISPI_IOPORT_DATA);
 146         }
 147 }
 148
 149 static void bochs_hw_set_big_endian(struct bochs_device *bochs)
 150 {
 151         if (bochs->qext_size < 8)
 152                 return;
 153
 154         writel(0xbebebebe, bochs->mmio + 0x604);
 155 }
 156
 157 static void bochs_hw_set_little_endian(struct bochs_device *bochs)
 158 {
 159         if (bochs->qext_size < 8)
 160                 return;
 161
 162         writel(0x1e1e1e1e, bochs->mmio + 0x604);
 163 }
 164
 165 #ifdef __BIG_ENDIAN
 166 #define bochs_hw_set_native_endian(_b) bochs_hw_set_big_endian(_b)
 167 #else
 168 #define bochs_hw_set_native_endian(_b) bochs_hw_set_little_endian(_b)
 169 #endif
 170
 171 static int bochs_get_edid_block(void *data, u8 *buf,
 172                                 unsigned int block, size_t len)
 173 {
 174         struct bochs_device *bochs = data;
 175         size_t i, start = block * EDID_LENGTH;
 176
 177         if (start + len > 0x400 /* vga register offset */)
 178                 return -1;
 179
 180         for (i = 0; i < len; i++)
 181                 buf[i] = readb(bochs->mmio + start + i);
 182
 183         return 0;
 184 }
 185
 186 static int bochs_hw_load_edid(struct bochs_device *bochs)
 187 {
 188         u8 header[8];
 189
 190         if (!bochs->mmio)
 191                 return -1;
 192
 193         /* check header to detect whenever edid support is enabled in qemu */
 194         bochs_get_edid_block(bochs, header, 0, ARRAY_SIZE(header));
 195         if (drm_edid_header_is_valid(header) != 8)
 196                 return -1;
 197
 198         kfree(bochs->edid);
 199         bochs->edid = drm_do_get_edid(&bochs->connector,
 200                                       bochs_get_edid_block, bochs);
 201         if (bochs->edid == NULL)
 202                 return -1;
 203
 204         return 0;
 205 }
 206
 207 static int bochs_hw_init(struct drm_device *dev)
 208 {
 209         struct bochs_device *bochs = dev->dev_private;
 210         struct pci_dev *pdev = to_pci_dev(dev->dev);
 211         unsigned long addr, size, mem, ioaddr, iosize;
 212         u16 id;
 213
 214         if (pdev->resource[2].flags & IORESOURCE_MEM) {
 215                 /* mmio bar with vga and bochs registers present */
 216                 if (pci_request_region(pdev, 2, "bochs-drm") != 0) {
 217                         DRM_ERROR("Cannot request mmio region\n");
 218                         return -EBUSY;
 219                 }
 220                 ioaddr = pci_resource_start(pdev, 2);
 221                 iosize = pci_resource_len(pdev, 2);
 222                 bochs->mmio = ioremap(ioaddr, iosize);
 223                 if (bochs->mmio == NULL) {
 224                         DRM_ERROR("Cannot map mmio region\n");
 225                         return -ENOMEM;
 226                 }
 227         } else {
 228                 ioaddr = VBE_DISPI_IOPORT_INDEX;
 229                 iosize = 2;
 230                 if (!request_region(ioaddr, iosize, "bochs-drm")) {
 231                         DRM_ERROR("Cannot request ioports\n");
 232                         return -EBUSY;
 233                 }
 234                 bochs->ioports = 1;
 235         }
 236
 237         id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
 238         mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K)
 239                 * 64 * 1024;
 240         if ((id & 0xfff0) != VBE_DISPI_ID0) {
 241                 DRM_ERROR("ID mismatch\n");
 242                 return -ENODEV;
 243         }
 244
 245         if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)
 246                 return -ENODEV;
 247         addr = pci_resource_start(pdev, 0);
 248         size = pci_resource_len(pdev, 0);
 249         if (addr == 0)
 250                 return -ENODEV;
 251         if (size != mem) {
 252                 DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n",
 253                         size, mem);
 254                 size = min(size, mem);
 255         }
 256
 257         if (pci_request_region(pdev, 0, "bochs-drm") != 0)
 258                 DRM_WARN("Cannot request framebuffer, boot fb still active?\n");
 259
 260         bochs->fb_map = ioremap(addr, size);
 261         if (bochs->fb_map == NULL) {
 262                 DRM_ERROR("Cannot map framebuffer\n");
 263                 return -ENOMEM;
 264         }
 265         bochs->fb_base = addr;
 266         bochs->fb_size = size;
 267
 268         DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
 269         DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
 270                  size / 1024, addr,
 271                  bochs->ioports ? "ioports" : "mmio",
 272                  ioaddr);
 273
 274         if (bochs->mmio && pdev->revision >= 2) {
 275                 bochs->qext_size = readl(bochs->mmio + 0x600);
 276                 if (bochs->qext_size < 4 || bochs->qext_size > iosize) {
 277                         bochs->qext_size = 0;
 278                         goto noext;
 279                 }
 280                 DRM_DEBUG("Found qemu ext regs, size %ld\n",
 281                           bochs->qext_size);
 282                 bochs_hw_set_native_endian(bochs);
 283         }
 284
 285 noext:
 286         return 0;
 287 }
 288
 289 static void bochs_hw_fini(struct drm_device *dev)
 290 {
 291         struct bochs_device *bochs = dev->dev_private;
 292
 293         /* TODO: shot down existing vram mappings */
 294
 295         if (bochs->mmio)
 296                 iounmap(bochs->mmio);
 297         if (bochs->ioports)
 298                 release_region(VBE_DISPI_IOPORT_INDEX, 2);
 299         if (bochs->fb_map)
 300                 iounmap(bochs->fb_map);
 301         pci_release_regions(to_pci_dev(dev->dev));
 302         kfree(bochs->edid);
 303 }
 304
 305 static void bochs_hw_blank(struct bochs_device *bochs, bool blank)
 306 {
 307         DRM_DEBUG_DRIVER("hw_blank %d\n", blank);
 308         /* discard ar_flip_flop */
 309         (void)bochs_vga_readb(bochs, VGA_IS1_RC);
 310         /* blank or unblank; we need only update index and set 0x20 */
 311         bochs_vga_writeb(bochs, VGA_ATT_W, blank ? 0 : 0x20);
 312 }
 313
 314 static void bochs_hw_setmode(struct bochs_device *bochs, struct drm_display_mode *mode)
 315 {
 316         int idx;
 317
 318         if (!drm_dev_enter(bochs->dev, &idx))
 319                 return;
 320
 321         bochs->xres = mode->hdisplay;
 322         bochs->yres = mode->vdisplay;
 323         bochs->bpp = 32;
 324         bochs->stride = mode->hdisplay * (bochs->bpp / 8);
 325         bochs->yres_virtual = bochs->fb_size / bochs->stride;
 326
 327         DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
 328                          bochs->xres, bochs->yres, bochs->bpp,
 329                          bochs->yres_virtual);
 330
 331         bochs_hw_blank(bochs, false);
 332
 333         bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,      0);
 334         bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP,         bochs->bpp);
 335         bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES,        bochs->xres);
 336         bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES,        bochs->yres);
 337         bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK,        0);
 338         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH,  bochs->xres);
 339         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT,
 340                           bochs->yres_virtual);
 341         bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET,    0);
 342         bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET,    0);
 343
 344         bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
 345                           VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
 346
 347         drm_dev_exit(idx);
 348 }
 349
 350 static void bochs_hw_setformat(struct bochs_device *bochs, const struct drm_format_info *format)
 351 {
 352         int idx;
 353
 354         if (!drm_dev_enter(bochs->dev, &idx))
 355                 return;
 356
 357         DRM_DEBUG_DRIVER("format %c%c%c%c\n",
 358                          (format->format >>  0) & 0xff,
 359                          (format->format >>  8) & 0xff,
 360                          (format->format >> 16) & 0xff,
 361                          (format->format >> 24) & 0xff);
 362
 363         switch (format->format) {
 364         case DRM_FORMAT_XRGB8888:
 365                 bochs_hw_set_little_endian(bochs);
 366                 break;
 367         case DRM_FORMAT_BGRX8888:
 368                 bochs_hw_set_big_endian(bochs);
 369                 break;
 370         default:
 371                 /* should not happen */
 372                 DRM_ERROR("%s: Huh? Got framebuffer format 0x%x",
 373                           __func__, format->format);
 374                 break;
 375         }
 376
 377         drm_dev_exit(idx);
 378 }
 379
 380 static void bochs_hw_setbase(struct bochs_device *bochs, int x, int y, int stride, u64 addr)
 381 {
 382         unsigned long offset;
 383         unsigned int vx, vy, vwidth, idx;
 384
 385         if (!drm_dev_enter(bochs->dev, &idx))
 386                 return;
 387
 388         bochs->stride = stride;
 389         offset = (unsigned long)addr +
 390                 y * bochs->stride +
 391                 x * (bochs->bpp / 8);
 392         vy = offset / bochs->stride;
 393         vx = (offset % bochs->stride) * 8 / bochs->bpp;
 394         vwidth = stride * 8 / bochs->bpp;
 395
 396         DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
 397                          x, y, addr, offset, vx, vy);
 398         bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
 399         bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
 400         bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
 401
 402         drm_dev_exit(idx);
 403 }
 404
 405 /* ---------------------------------------------------------------------- */
 406
 407 static const uint32_t bochs_formats[] = {
 408         DRM_FORMAT_XRGB8888,
 409         DRM_FORMAT_BGRX8888,
 410 };
 411
 412 static void bochs_plane_update(struct bochs_device *bochs, struct drm_plane_state *state)
 413 {
 414         struct drm_gem_vram_object *gbo;
 415         s64 gpu_addr;
 416
 417         if (!state->fb || !bochs->stride)
 418                 return;
 419
 420         gbo = drm_gem_vram_of_gem(state->fb->obj[0]);
 421         gpu_addr = drm_gem_vram_offset(gbo);
 422         if (WARN_ON_ONCE(gpu_addr < 0))
 423                 return; /* Bug: we didn't pin the BO to VRAM in prepare_fb. */
 424
 425         bochs_hw_setbase(bochs,
 426                          state->crtc_x,
 427                          state->crtc_y,
 428                          state->fb->pitches[0],
 429                          state->fb->offsets[0] + gpu_addr);
 430         bochs_hw_setformat(bochs, state->fb->format);
 431 }
 432
 433 static void bochs_pipe_enable(struct drm_simple_display_pipe *pipe,
 434                               struct drm_crtc_state *crtc_state,
 435                               struct drm_plane_state *plane_state)
 436 {
 437         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 438
 439         bochs_hw_setmode(bochs, &crtc_state->mode);
 440         bochs_plane_update(bochs, plane_state);
 441 }
 442
 443 static void bochs_pipe_disable(struct drm_simple_display_pipe *pipe)
 444 {
 445         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 446
 447         bochs_hw_blank(bochs, true);
 448 }
 449
 450 static void bochs_pipe_update(struct drm_simple_display_pipe *pipe,
 451                               struct drm_plane_state *old_state)
 452 {
 453         struct bochs_device *bochs = pipe->crtc.dev->dev_private;
 454
 455         bochs_plane_update(bochs, pipe->plane.state);
 456 }
 457
 458 static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = {
 459         .enable     = bochs_pipe_enable,
 460         .disable    = bochs_pipe_disable,
 461         .update     = bochs_pipe_update,
 462         .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb,
 463         .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb,
 464 };
 465
 466 static int bochs_connector_get_modes(struct drm_connector *connector)
 467 {
 468         struct bochs_device *bochs =
 469                 container_of(connector, struct bochs_device, connector);
 470         int count = 0;
 471
 472         if (bochs->edid)
 473                 count = drm_add_edid_modes(connector, bochs->edid);
 474
 475         if (!count) {
 476                 count = drm_add_modes_noedid(connector, 8192, 8192);
 477                 drm_set_preferred_mode(connector, defx, defy);
 478         }
 479         return count;
 480 }
 481
 482 static const struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
 483         .get_modes = bochs_connector_get_modes,
 484 };
 485
 486 static const struct drm_connector_funcs bochs_connector_connector_funcs = {
 487         .fill_modes = drm_helper_probe_single_connector_modes,
 488         .destroy = drm_connector_cleanup,
 489         .reset = drm_atomic_helper_connector_reset,
 490         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 491         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 492 };
 493
 494 static void bochs_connector_init(struct drm_device *dev)
 495 {
 496         struct bochs_device *bochs = dev->dev_private;
 497         struct drm_connector *connector = &bochs->connector;
 498
 499         drm_connector_init(dev, connector, &bochs_connector_connector_funcs,
 500                            DRM_MODE_CONNECTOR_VIRTUAL);
 501         drm_connector_helper_add(connector, &bochs_connector_connector_helper_funcs);
 502
 503         bochs_hw_load_edid(bochs);
 504         if (bochs->edid) {
 505                 DRM_INFO("Found EDID data blob.\n");
 506                 drm_connector_attach_edid_property(connector);
 507                 drm_connector_update_edid_property(connector, bochs->edid);
 508         }
 509 }
 510
 511 static struct drm_framebuffer *
 512 bochs_gem_fb_create(struct drm_device *dev, struct drm_file *file,
 513                     const struct drm_mode_fb_cmd2 *mode_cmd)
 514 {
 515         if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888 &&
 516             mode_cmd->pixel_format != DRM_FORMAT_BGRX8888)
 517                 return ERR_PTR(-EINVAL);
 518
 519         return drm_gem_fb_create(dev, file, mode_cmd);
 520 }
 521
 522 static const struct drm_mode_config_funcs bochs_mode_funcs = {
 523         .fb_create = bochs_gem_fb_create,
 524         .mode_valid = drm_vram_helper_mode_valid,
 525         .atomic_check = drm_atomic_helper_check,
 526         .atomic_commit = drm_atomic_helper_commit,
 527 };
 528
 529 static int bochs_kms_init(struct bochs_device *bochs)
 530 {
 531         int ret;
 532
 533         ret = drmm_mode_config_init(bochs->dev);
 534         if (ret)
 535                 return ret;
 536
 537         bochs->dev->mode_config.max_width = 8192;
 538         bochs->dev->mode_config.max_height = 8192;
 539
 540         bochs->dev->mode_config.fb_base = bochs->fb_base;
 541         bochs->dev->mode_config.preferred_depth = 24;
 542         bochs->dev->mode_config.prefer_shadow = 0;
 543         bochs->dev->mode_config.prefer_shadow_fbdev = 1;
 544         bochs->dev->mode_config.quirk_addfb_prefer_host_byte_order = true;
 545
 546         bochs->dev->mode_config.funcs = &bochs_mode_funcs;
 547
 548         bochs_connector_init(bochs->dev);
 549         drm_simple_display_pipe_init(bochs->dev,
 550                                      &bochs->pipe,
 551                                      &bochs_pipe_funcs,
 552                                      bochs_formats,
 553                                      ARRAY_SIZE(bochs_formats),
 554                                      NULL,
 555                                      &bochs->connector);
 556
 557         drm_mode_config_reset(bochs->dev);
 558
 559         return 0;
 560 }
 561
 562 /* ---------------------------------------------------------------------- */
 563 /* drm interface                                                          */
 564
 565 static int bochs_load(struct drm_device *dev)
 566 {
 567         struct bochs_device *bochs;
 568         int ret;
 569
 570         bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
 571         if (bochs == NULL)
 572                 return -ENOMEM;
 573         dev->dev_private = bochs;
 574         bochs->dev = dev;
 575
 576         ret = bochs_hw_init(dev);
 577         if (ret)
 578                 return ret;
 579
 580         ret = drmm_vram_helper_init(dev, bochs->fb_base, bochs->fb_size);
 581         if (ret)
 582                 return ret;
 583
 584         ret = bochs_kms_init(bochs);
 585         if (ret)
 586                 return ret;
 587
 588         return 0;
 589 }
 590
 591 DEFINE_DRM_GEM_FOPS(bochs_fops);
 592
 593 static const struct drm_driver bochs_driver = {
 594         .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 595         .fops                   = &bochs_fops,
 596         .name                   = "bochs-drm",
 597         .desc                   = "bochs dispi vga interface (qemu stdvga)",
 598         .date                   = "20130925",
 599         .major                  = 1,
 600         .minor                  = 0,
 601         DRM_GEM_VRAM_DRIVER,
 602 };
 603
 604 /* ---------------------------------------------------------------------- */
 605 /* pm interface                                                           */
 606
 607 #ifdef CONFIG_PM_SLEEP
 608 static int bochs_pm_suspend(struct device *dev)
 609 {
 610         struct drm_device *drm_dev = dev_get_drvdata(dev);
 611
 612         return drm_mode_config_helper_suspend(drm_dev);
 613 }
 614
 615 static int bochs_pm_resume(struct device *dev)
 616 {
 617         struct drm_device *drm_dev = dev_get_drvdata(dev);
 618
 619         return drm_mode_config_helper_resume(drm_dev);
 620 }
 621 #endif
 622
 623 static const struct dev_pm_ops bochs_pm_ops = {
 624         SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
 625                                 bochs_pm_resume)
 626 };
 627
 628 /* ---------------------------------------------------------------------- */
 629 /* pci interface                                                          */
 630
 631 static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 632 {
 633         struct drm_device *dev;
 634         unsigned long fbsize;
 635         int ret;
 636
 637         fbsize = pci_resource_len(pdev, 0);
 638         if (fbsize < 4 * 1024 * 1024) {
 639                 DRM_ERROR("less than 4 MB video memory, ignoring device\n");
 640                 return -ENOMEM;
 641         }
 642
 643         ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &bochs_driver);
 644         if (ret)
 645                 return ret;
 646
 647         dev = drm_dev_alloc(&bochs_driver, &pdev->dev);
 648         if (IS_ERR(dev))
 649                 return PTR_ERR(dev);
 650
 651         ret = pcim_enable_device(pdev);
 652         if (ret)
 653                 goto err_free_dev;
 654
 655         pci_set_drvdata(pdev, dev);
 656
 657         ret = bochs_load(dev);
 658         if (ret)
 659                 goto err_free_dev;
 660
 661         ret = drm_dev_register(dev, 0);
 662         if (ret)
 663                 goto err_free_dev;
 664
 665         drm_fbdev_generic_setup(dev, 32);
 666         return ret;
 667
 668 err_free_dev:
 669         drm_dev_put(dev);
 670         return ret;
 671 }
 672
 673 static void bochs_pci_remove(struct pci_dev *pdev)
 674 {
 675         struct drm_device *dev = pci_get_drvdata(pdev);
 676
 677         drm_dev_unplug(dev);
 678         drm_atomic_helper_shutdown(dev);
 679         bochs_hw_fini(dev);
 680         drm_dev_put(dev);
 681 }
 682
 683 static const struct pci_device_id bochs_pci_tbl[] = {
 684         {
 685                 .vendor      = 0x1234,
 686                 .device      = 0x1111,
 687                 .subvendor   = PCI_SUBVENDOR_ID_REDHAT_QUMRANET,
 688                 .subdevice   = PCI_SUBDEVICE_ID_QEMU,
 689                 .driver_data = BOCHS_QEMU_STDVGA,
 690         },
 691         {
 692                 .vendor      = 0x1234,
 693                 .device      = 0x1111,
 694                 .subvendor   = PCI_ANY_ID,
 695                 .subdevice   = PCI_ANY_ID,
 696                 .driver_data = BOCHS_UNKNOWN,
 697         },
 698         {
 699                 .vendor      = 0x4321,
 700                 .device      = 0x1111,
 701                 .subvendor   = PCI_ANY_ID,
 702                 .subdevice   = PCI_ANY_ID,
 703                 .driver_data = BOCHS_SIMICS,
 704         },
 705         { /* end of list */ }
 706 };
 707
 708 static struct pci_driver bochs_pci_driver = {
 709         .name =         "bochs-drm",
 710         .id_table =     bochs_pci_tbl,
 711         .probe =        bochs_pci_probe,
 712         .remove =       bochs_pci_remove,
 713         .driver.pm =    &bochs_pm_ops,
 714 };
 715
 716 /* ---------------------------------------------------------------------- */
 717 /* module init/exit                                                       */
 718
 719 static int __init bochs_init(void)
 720 {
 721         if (drm_firmware_drivers_only() && bochs_modeset == -1)
 722                 return -EINVAL;
 723
 724         if (bochs_modeset == 0)
 725                 return -EINVAL;
 726
 727         return pci_register_driver(&bochs_pci_driver);
 728 }
 729
 730 static void __exit bochs_exit(void)
 731 {
 732         pci_unregister_driver(&bochs_pci_driver);
 733 }
 734
 735 module_init(bochs_init);
 736 module_exit(bochs_exit);
 737
 738 MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
 739 MODULE_AUTHOR("Gerd Hoffmann <[email protected]>");
 740 MODULE_LICENSE("GPL");