drivers/gpu/drm/i915/i915_pci.c

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include <linux/console.h>
  26 #include <linux/vgaarb.h>
  27 #include <linux/vga_switcheroo.h>
  28
  29 #include "i915_drv.h"
  30 #include "i915_selftest.h"
  31
  32 #define GEN_DEFAULT_PIPEOFFSETS \
  33         .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
  34                           PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
  35         .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
  36                            TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
  37         .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
  38
  39 #define GEN_CHV_PIPEOFFSETS \
  40         .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
  41                           CHV_PIPE_C_OFFSET }, \
  42         .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
  43                            CHV_TRANSCODER_C_OFFSET, }, \
  44         .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET, \
  45                              CHV_PALETTE_C_OFFSET }
  46
  47 #define CURSOR_OFFSETS \
  48         .cursor_offsets = { CURSOR_A_OFFSET, CURSOR_B_OFFSET, CHV_CURSOR_C_OFFSET }
  49
  50 #define IVB_CURSOR_OFFSETS \
  51         .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
  52
  53 #define BDW_COLORS \
  54         .color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }
  55 #define CHV_COLORS \
  56         .color = { .degamma_lut_size = 65, .gamma_lut_size = 257 }
  57
  58 /* Keep in gen based order, and chronological order within a gen */
  59 #define GEN2_FEATURES \
  60         .gen = 2, .num_pipes = 1, \
  61         .has_overlay = 1, .overlay_needs_physical = 1, \
  62         .has_gmch_display = 1, \
  63         .hws_needs_physical = 1, \
  64         .unfenced_needs_alignment = 1, \
  65         .ring_mask = RENDER_RING, \
  66         GEN_DEFAULT_PIPEOFFSETS, \
  67         CURSOR_OFFSETS
  68
  69 static const struct intel_device_info intel_i830_info = {
  70         GEN2_FEATURES,
  71         .platform = INTEL_I830,
  72         .is_mobile = 1, .cursor_needs_physical = 1,
  73         .num_pipes = 2, /* legal, last one wins */
  74 };
  75
  76 static const struct intel_device_info intel_i845g_info = {
  77         GEN2_FEATURES,
  78         .platform = INTEL_I845G,
  79 };
  80
  81 static const struct intel_device_info intel_i85x_info = {
  82         GEN2_FEATURES,
  83         .platform = INTEL_I85X, .is_mobile = 1,
  84         .num_pipes = 2, /* legal, last one wins */
  85         .cursor_needs_physical = 1,
  86         .has_fbc = 1,
  87 };
  88
  89 static const struct intel_device_info intel_i865g_info = {
  90         GEN2_FEATURES,
  91         .platform = INTEL_I865G,
  92 };
  93
  94 #define GEN3_FEATURES \
  95         .gen = 3, .num_pipes = 2, \
  96         .has_gmch_display = 1, \
  97         .ring_mask = RENDER_RING, \
  98         GEN_DEFAULT_PIPEOFFSETS, \
  99         CURSOR_OFFSETS
 100
 101 static const struct intel_device_info intel_i915g_info = {
 102         GEN3_FEATURES,
 103         .platform = INTEL_I915G, .cursor_needs_physical = 1,
 104         .has_overlay = 1, .overlay_needs_physical = 1,
 105         .hws_needs_physical = 1,
 106         .unfenced_needs_alignment = 1,
 107 };
 108
 109 static const struct intel_device_info intel_i915gm_info = {
 110         GEN3_FEATURES,
 111         .platform = INTEL_I915GM,
 112         .is_mobile = 1,
 113         .cursor_needs_physical = 1,
 114         .has_overlay = 1, .overlay_needs_physical = 1,
 115         .supports_tv = 1,
 116         .has_fbc = 1,
 117         .hws_needs_physical = 1,
 118         .unfenced_needs_alignment = 1,
 119 };
 120
 121 static const struct intel_device_info intel_i945g_info = {
 122         GEN3_FEATURES,
 123         .platform = INTEL_I945G,
 124         .has_hotplug = 1, .cursor_needs_physical = 1,
 125         .has_overlay = 1, .overlay_needs_physical = 1,
 126         .hws_needs_physical = 1,
 127         .unfenced_needs_alignment = 1,
 128 };
 129
 130 static const struct intel_device_info intel_i945gm_info = {
 131         GEN3_FEATURES,
 132         .platform = INTEL_I945GM, .is_mobile = 1,
 133         .has_hotplug = 1, .cursor_needs_physical = 1,
 134         .has_overlay = 1, .overlay_needs_physical = 1,
 135         .supports_tv = 1,
 136         .has_fbc = 1,
 137         .hws_needs_physical = 1,
 138         .unfenced_needs_alignment = 1,
 139 };
 140
 141 static const struct intel_device_info intel_g33_info = {
 142         GEN3_FEATURES,
 143         .platform = INTEL_G33,
 144         .has_hotplug = 1,
 145         .has_overlay = 1,
 146 };
 147
 148 static const struct intel_device_info intel_pineview_info = {
 149         GEN3_FEATURES,
 150         .platform = INTEL_PINEVIEW, .is_mobile = 1,
 151         .has_hotplug = 1,
 152         .has_overlay = 1,
 153 };
 154
 155 #define GEN4_FEATURES \
 156         .gen = 4, .num_pipes = 2, \
 157         .has_hotplug = 1, \
 158         .has_gmch_display = 1, \
 159         .ring_mask = RENDER_RING, \
 160         GEN_DEFAULT_PIPEOFFSETS, \
 161         CURSOR_OFFSETS
 162
 163 static const struct intel_device_info intel_i965g_info = {
 164         GEN4_FEATURES,
 165         .platform = INTEL_I965G,
 166         .has_overlay = 1,
 167         .hws_needs_physical = 1,
 168 };
 169
 170 static const struct intel_device_info intel_i965gm_info = {
 171         GEN4_FEATURES,
 172         .platform = INTEL_I965GM,
 173         .is_mobile = 1, .has_fbc = 1,
 174         .has_overlay = 1,
 175         .supports_tv = 1,
 176         .hws_needs_physical = 1,
 177 };
 178
 179 static const struct intel_device_info intel_g45_info = {
 180         GEN4_FEATURES,
 181         .platform = INTEL_G45,
 182         .has_pipe_cxsr = 1,
 183         .ring_mask = RENDER_RING | BSD_RING,
 184 };
 185
 186 static const struct intel_device_info intel_gm45_info = {
 187         GEN4_FEATURES,
 188         .platform = INTEL_GM45,
 189         .is_mobile = 1, .has_fbc = 1,
 190         .has_pipe_cxsr = 1,
 191         .supports_tv = 1,
 192         .ring_mask = RENDER_RING | BSD_RING,
 193 };
 194
 195 #define GEN5_FEATURES \
 196         .gen = 5, .num_pipes = 2, \
 197         .has_hotplug = 1, \
 198         .has_gmbus_irq = 1, \
 199         .ring_mask = RENDER_RING | BSD_RING, \
 200         GEN_DEFAULT_PIPEOFFSETS, \
 201         CURSOR_OFFSETS
 202
 203 static const struct intel_device_info intel_ironlake_d_info = {
 204         GEN5_FEATURES,
 205         .platform = INTEL_IRONLAKE,
 206 };
 207
 208 static const struct intel_device_info intel_ironlake_m_info = {
 209         GEN5_FEATURES,
 210         .platform = INTEL_IRONLAKE,
 211         .is_mobile = 1, .has_fbc = 1,
 212 };
 213
 214 #define GEN6_FEATURES \
 215         .gen = 6, .num_pipes = 2, \
 216         .has_hotplug = 1, \
 217         .has_fbc = 1, \
 218         .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
 219         .has_llc = 1, \
 220         .has_rc6 = 1, \
 221         .has_rc6p = 1, \
 222         .has_gmbus_irq = 1, \
 223         .has_aliasing_ppgtt = 1, \
 224         GEN_DEFAULT_PIPEOFFSETS, \
 225         CURSOR_OFFSETS
 226
 227 static const struct intel_device_info intel_sandybridge_d_info = {
 228         GEN6_FEATURES,
 229         .platform = INTEL_SANDYBRIDGE,
 230 };
 231
 232 static const struct intel_device_info intel_sandybridge_m_info = {
 233         GEN6_FEATURES,
 234         .platform = INTEL_SANDYBRIDGE,
 235         .is_mobile = 1,
 236 };
 237
 238 #define GEN7_FEATURES  \
 239         .gen = 7, .num_pipes = 3, \
 240         .has_hotplug = 1, \
 241         .has_fbc = 1, \
 242         .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
 243         .has_llc = 1, \
 244         .has_rc6 = 1, \
 245         .has_rc6p = 1, \
 246         .has_gmbus_irq = 1, \
 247         .has_aliasing_ppgtt = 1, \
 248         .has_full_ppgtt = 1, \
 249         GEN_DEFAULT_PIPEOFFSETS, \
 250         IVB_CURSOR_OFFSETS
 251
 252 static const struct intel_device_info intel_ivybridge_d_info = {
 253         GEN7_FEATURES,
 254         .platform = INTEL_IVYBRIDGE,
 255         .has_l3_dpf = 1,
 256 };
 257
 258 static const struct intel_device_info intel_ivybridge_m_info = {
 259         GEN7_FEATURES,
 260         .platform = INTEL_IVYBRIDGE,
 261         .is_mobile = 1,
 262         .has_l3_dpf = 1,
 263 };
 264
 265 static const struct intel_device_info intel_ivybridge_q_info = {
 266         GEN7_FEATURES,
 267         .platform = INTEL_IVYBRIDGE,
 268         .num_pipes = 0, /* legal, last one wins */
 269         .has_l3_dpf = 1,
 270 };
 271
 272 static const struct intel_device_info intel_valleyview_info = {
 273         .platform = INTEL_VALLEYVIEW,
 274         .gen = 7,
 275         .is_lp = 1,
 276         .num_pipes = 2,
 277         .has_psr = 1,
 278         .has_runtime_pm = 1,
 279         .has_rc6 = 1,
 280         .has_gmbus_irq = 1,
 281         .has_gmch_display = 1,
 282         .has_hotplug = 1,
 283         .has_aliasing_ppgtt = 1,
 284         .has_full_ppgtt = 1,
 285         .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 286         .display_mmio_offset = VLV_DISPLAY_BASE,
 287         GEN_DEFAULT_PIPEOFFSETS,
 288         CURSOR_OFFSETS
 289 };
 290
 291 #define HSW_FEATURES  \
 292         GEN7_FEATURES, \
 293         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, \
 294         .has_ddi = 1, \
 295         .has_fpga_dbg = 1, \
 296         .has_psr = 1, \
 297         .has_resource_streamer = 1, \
 298         .has_dp_mst = 1, \
 299         .has_rc6p = 0 /* RC6p removed-by HSW */, \
 300         .has_runtime_pm = 1
 301
 302 static const struct intel_device_info intel_haswell_info = {
 303         HSW_FEATURES,
 304         .platform = INTEL_HASWELL,
 305         .has_l3_dpf = 1,
 306 };
 307
 308 #define BDW_FEATURES \
 309         HSW_FEATURES, \
 310         BDW_COLORS, \
 311         .has_logical_ring_contexts = 1, \
 312         .has_full_48bit_ppgtt = 1, \
 313         .has_64bit_reloc = 1
 314
 315 #define BDW_PLATFORM \
 316         BDW_FEATURES, \
 317         .gen = 8, \
 318         .platform = INTEL_BROADWELL
 319
 320 static const struct intel_device_info intel_broadwell_info = {
 321         BDW_PLATFORM,
 322 };
 323
 324 static const struct intel_device_info intel_broadwell_gt3_info = {
 325         BDW_PLATFORM,
 326         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 327 };
 328
 329 static const struct intel_device_info intel_cherryview_info = {
 330         .gen = 8, .num_pipes = 3,
 331         .has_hotplug = 1,
 332         .is_lp = 1,
 333         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 334         .platform = INTEL_CHERRYVIEW,
 335         .has_64bit_reloc = 1,
 336         .has_psr = 1,
 337         .has_runtime_pm = 1,
 338         .has_resource_streamer = 1,
 339         .has_rc6 = 1,
 340         .has_gmbus_irq = 1,
 341         .has_logical_ring_contexts = 1,
 342         .has_gmch_display = 1,
 343         .has_aliasing_ppgtt = 1,
 344         .has_full_ppgtt = 1,
 345         .display_mmio_offset = VLV_DISPLAY_BASE,
 346         GEN_CHV_PIPEOFFSETS,
 347         CURSOR_OFFSETS,
 348         CHV_COLORS,
 349 };
 350
 351 #define SKL_PLATFORM \
 352         BDW_FEATURES, \
 353         .gen = 9, \
 354         .platform = INTEL_SKYLAKE, \
 355         .has_csr = 1, \
 356         .has_guc = 1, \
 357         .ddb_size = 896
 358
 359 static const struct intel_device_info intel_skylake_info = {
 360         SKL_PLATFORM,
 361 };
 362
 363 static const struct intel_device_info intel_skylake_gt3_info = {
 364         SKL_PLATFORM,
 365         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 366 };
 367
 368 #define GEN9_LP_FEATURES \
 369         .gen = 9, \
 370         .is_lp = 1, \
 371         .has_hotplug = 1, \
 372         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, \
 373         .num_pipes = 3, \
 374         .has_64bit_reloc = 1, \
 375         .has_ddi = 1, \
 376         .has_fpga_dbg = 1, \
 377         .has_fbc = 1, \
 378         .has_runtime_pm = 1, \
 379         .has_pooled_eu = 0, \
 380         .has_csr = 1, \
 381         .has_resource_streamer = 1, \
 382         .has_rc6 = 1, \
 383         .has_dp_mst = 1, \
 384         .has_gmbus_irq = 1, \
 385         .has_logical_ring_contexts = 1, \
 386         .has_guc = 1, \
 387         .has_aliasing_ppgtt = 1, \
 388         .has_full_ppgtt = 1, \
 389         .has_full_48bit_ppgtt = 1, \
 390         GEN_DEFAULT_PIPEOFFSETS, \
 391         IVB_CURSOR_OFFSETS, \
 392         BDW_COLORS
 393
 394 static const struct intel_device_info intel_broxton_info = {
 395         GEN9_LP_FEATURES,
 396         .platform = INTEL_BROXTON,
 397         .ddb_size = 512,
 398 };
 399
 400 static const struct intel_device_info intel_geminilake_info = {
 401         GEN9_LP_FEATURES,
 402         .platform = INTEL_GEMINILAKE,
 403         .ddb_size = 1024,
 404         .color = { .degamma_lut_size = 0, .gamma_lut_size = 1024 }
 405 };
 406
 407 #define KBL_PLATFORM \
 408         BDW_FEATURES, \
 409         .gen = 9, \
 410         .platform = INTEL_KABYLAKE, \
 411         .has_csr = 1, \
 412         .has_guc = 1, \
 413         .ddb_size = 896
 414
 415 static const struct intel_device_info intel_kabylake_info = {
 416         KBL_PLATFORM,
 417 };
 418
 419 static const struct intel_device_info intel_kabylake_gt3_info = {
 420         KBL_PLATFORM,
 421         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 422 };
 423
 424 #define CFL_PLATFORM \
 425         .is_alpha_support = 1, \
 426         BDW_FEATURES, \
 427         .gen = 9, \
 428         .platform = INTEL_COFFEELAKE, \
 429         .has_csr = 1, \
 430         .has_guc = 1, \
 431         .ddb_size = 896
 432
 433 static const struct intel_device_info intel_coffeelake_info = {
 434         CFL_PLATFORM,
 435 };
 436
 437 static const struct intel_device_info intel_coffeelake_gt3_info = {
 438         CFL_PLATFORM,
 439         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 440 };
 441
 442 static const struct intel_device_info intel_cannonlake_info = {
 443         BDW_FEATURES,
 444         .is_alpha_support = 1,
 445         .platform = INTEL_CANNONLAKE,
 446         .gen = 10,
 447         .ddb_size = 1024,
 448         .has_csr = 1,
 449 };
 450
 451 /*
 452  * Make sure any device matches here are from most specific to most
 453  * general.  For example, since the Quanta match is based on the subsystem
 454  * and subvendor IDs, we need it to come before the more general IVB
 455  * PCI ID matches, otherwise we'll use the wrong info struct above.
 456  */
 457 static const struct pci_device_id pciidlist[] = {
 458         INTEL_I830_IDS(&intel_i830_info),
 459         INTEL_I845G_IDS(&intel_i845g_info),
 460         INTEL_I85X_IDS(&intel_i85x_info),
 461         INTEL_I865G_IDS(&intel_i865g_info),
 462         INTEL_I915G_IDS(&intel_i915g_info),
 463         INTEL_I915GM_IDS(&intel_i915gm_info),
 464         INTEL_I945G_IDS(&intel_i945g_info),
 465         INTEL_I945GM_IDS(&intel_i945gm_info),
 466         INTEL_I965G_IDS(&intel_i965g_info),
 467         INTEL_G33_IDS(&intel_g33_info),
 468         INTEL_I965GM_IDS(&intel_i965gm_info),
 469         INTEL_GM45_IDS(&intel_gm45_info),
 470         INTEL_G45_IDS(&intel_g45_info),
 471         INTEL_PINEVIEW_IDS(&intel_pineview_info),
 472         INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),
 473         INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),
 474         INTEL_SNB_D_IDS(&intel_sandybridge_d_info),
 475         INTEL_SNB_M_IDS(&intel_sandybridge_m_info),
 476         INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */
 477         INTEL_IVB_M_IDS(&intel_ivybridge_m_info),
 478         INTEL_IVB_D_IDS(&intel_ivybridge_d_info),
 479         INTEL_HSW_IDS(&intel_haswell_info),
 480         INTEL_VLV_IDS(&intel_valleyview_info),
 481         INTEL_BDW_GT12_IDS(&intel_broadwell_info),
 482         INTEL_BDW_GT3_IDS(&intel_broadwell_gt3_info),
 483         INTEL_BDW_RSVD_IDS(&intel_broadwell_info),
 484         INTEL_CHV_IDS(&intel_cherryview_info),
 485         INTEL_SKL_GT1_IDS(&intel_skylake_info),
 486         INTEL_SKL_GT2_IDS(&intel_skylake_info),
 487         INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info),
 488         INTEL_SKL_GT4_IDS(&intel_skylake_gt3_info),
 489         INTEL_BXT_IDS(&intel_broxton_info),
 490         INTEL_GLK_IDS(&intel_geminilake_info),
 491         INTEL_KBL_GT1_IDS(&intel_kabylake_info),
 492         INTEL_KBL_GT2_IDS(&intel_kabylake_info),
 493         INTEL_KBL_GT3_IDS(&intel_kabylake_gt3_info),
 494         INTEL_KBL_GT4_IDS(&intel_kabylake_gt3_info),
 495         INTEL_CFL_S_IDS(&intel_coffeelake_info),
 496         INTEL_CFL_H_IDS(&intel_coffeelake_info),
 497         INTEL_CFL_U_IDS(&intel_coffeelake_gt3_info),
 498         INTEL_CNL_IDS(&intel_cannonlake_info),
 499         {0, 0, 0}
 500 };
 501 MODULE_DEVICE_TABLE(pci, pciidlist);
 502
 503 static void i915_pci_remove(struct pci_dev *pdev)
 504 {
 505         struct drm_device *dev = pci_get_drvdata(pdev);
 506
 507         i915_driver_unload(dev);
 508         drm_dev_unref(dev);
 509 }
 510
 511 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 512 {
 513         struct intel_device_info *intel_info =
 514                 (struct intel_device_info *) ent->driver_data;
 515         int err;
 516
 517         if (IS_ALPHA_SUPPORT(intel_info) && !i915.alpha_support) {
 518                 DRM_INFO("The driver support for your hardware in this kernel version is alpha quality\n"
 519                          "See CONFIG_DRM_I915_ALPHA_SUPPORT or i915.alpha_support module parameter\n"
 520                          "to enable support in this kernel version, or check for kernel updates.\n");
 521                 return -ENODEV;
 522         }
 523
 524         /* Only bind to function 0 of the device. Early generations
 525          * used function 1 as a placeholder for multi-head. This causes
 526          * us confusion instead, especially on the systems where both
 527          * functions have the same PCI-ID!
 528          */
 529         if (PCI_FUNC(pdev->devfn))
 530                 return -ENODEV;
 531
 532         /*
 533          * apple-gmux is needed on dual GPU MacBook Pro
 534          * to probe the panel if we're the inactive GPU.
 535          */
 536         if (vga_switcheroo_client_probe_defer(pdev))
 537                 return -EPROBE_DEFER;
 538
 539         err = i915_driver_load(pdev, ent);
 540         if (err)
 541                 return err;
 542
 543         err = i915_live_selftests(pdev);
 544         if (err) {
 545                 i915_pci_remove(pdev);
 546                 return err > 0 ? -ENOTTY : err;
 547         }
 548
 549         return 0;
 550 }
 551
 552 static struct pci_driver i915_pci_driver = {
 553         .name = DRIVER_NAME,
 554         .id_table = pciidlist,
 555         .probe = i915_pci_probe,
 556         .remove = i915_pci_remove,
 557         .driver.pm = &i915_pm_ops,
 558 };
 559
 560 static int __init i915_init(void)
 561 {
 562         bool use_kms = true;
 563         int err;
 564
 565         err = i915_mock_selftests();
 566         if (err)
 567                 return err > 0 ? 0 : err;
 568
 569         /*
 570          * Enable KMS by default, unless explicitly overriden by
 571          * either the i915.modeset prarameter or by the
 572          * vga_text_mode_force boot option.
 573          */
 574
 575         if (i915.modeset == 0)
 576                 use_kms = false;
 577
 578         if (vgacon_text_force() && i915.modeset == -1)
 579                 use_kms = false;
 580
 581         if (!use_kms) {
 582                 /* Silently fail loading to not upset userspace. */
 583                 DRM_DEBUG_DRIVER("KMS disabled.\n");
 584                 return 0;
 585         }
 586
 587         return pci_register_driver(&i915_pci_driver);
 588 }
 589
 590 static void __exit i915_exit(void)
 591 {
 592         if (!i915_pci_driver.driver.owner)
 593                 return;
 594
 595         pci_unregister_driver(&i915_pci_driver);
 596 }
 597
 598 module_init(i915_init);
 599 module_exit(i915_exit);
 600
 601 MODULE_AUTHOR("Tungsten Graphics, Inc.");
 602 MODULE_AUTHOR("Intel Corporation");
 603
 604 MODULE_DESCRIPTION(DRIVER_DESC);
 605 MODULE_LICENSE("GPL and additional rights");