drivers/gpu/drm/i915/i915_drv.c

   1 /* i915_drv.c -- i830,i845,i855,i865,i915 driver -*- linux-c -*-
   2  */
   3 /*
   4  *
   5  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  *
  28  */
  29
  30 #include <linux/device.h>
  31 #include <drm/drmP.h>
  32 #include <drm/i915_drm.h>
  33 #include "i915_drv.h"
  34 #include "i915_trace.h"
  35 #include "intel_drv.h"
  36
  37 #include <linux/console.h>
  38 #include <linux/module.h>
  39 #include <drm/drm_crtc_helper.h>
  40
  41 static struct drm_driver driver;
  42
  43 #define GEN_DEFAULT_PIPEOFFSETS \
  44         .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
  45                           PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
  46         .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
  47                            TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
  48         .dpll_offsets = { DPLL_A_OFFSET, DPLL_B_OFFSET }, \
  49         .dpll_md_offsets = { DPLL_A_MD_OFFSET, DPLL_B_MD_OFFSET }, \
  50         .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
  51
  52
  53 static const struct intel_device_info intel_i830_info = {
  54         .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1, .num_pipes = 2,
  55         .has_overlay = 1, .overlay_needs_physical = 1,
  56         .ring_mask = RENDER_RING,
  57         GEN_DEFAULT_PIPEOFFSETS,
  58 };
  59
  60 static const struct intel_device_info intel_845g_info = {
  61         .gen = 2, .num_pipes = 1,
  62         .has_overlay = 1, .overlay_needs_physical = 1,
  63         .ring_mask = RENDER_RING,
  64         GEN_DEFAULT_PIPEOFFSETS,
  65 };
  66
  67 static const struct intel_device_info intel_i85x_info = {
  68         .gen = 2, .is_i85x = 1, .is_mobile = 1, .num_pipes = 2,
  69         .cursor_needs_physical = 1,
  70         .has_overlay = 1, .overlay_needs_physical = 1,
  71         .has_fbc = 1,
  72         .ring_mask = RENDER_RING,
  73         GEN_DEFAULT_PIPEOFFSETS,
  74 };
  75
  76 static const struct intel_device_info intel_i865g_info = {
  77         .gen = 2, .num_pipes = 1,
  78         .has_overlay = 1, .overlay_needs_physical = 1,
  79         .ring_mask = RENDER_RING,
  80         GEN_DEFAULT_PIPEOFFSETS,
  81 };
  82
  83 static const struct intel_device_info intel_i915g_info = {
  84         .gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,
  85         .has_overlay = 1, .overlay_needs_physical = 1,
  86         .ring_mask = RENDER_RING,
  87         GEN_DEFAULT_PIPEOFFSETS,
  88 };
  89 static const struct intel_device_info intel_i915gm_info = {
  90         .gen = 3, .is_mobile = 1, .num_pipes = 2,
  91         .cursor_needs_physical = 1,
  92         .has_overlay = 1, .overlay_needs_physical = 1,
  93         .supports_tv = 1,
  94         .has_fbc = 1,
  95         .ring_mask = RENDER_RING,
  96         GEN_DEFAULT_PIPEOFFSETS,
  97 };
  98 static const struct intel_device_info intel_i945g_info = {
  99         .gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 100         .has_overlay = 1, .overlay_needs_physical = 1,
 101         .ring_mask = RENDER_RING,
 102         GEN_DEFAULT_PIPEOFFSETS,
 103 };
 104 static const struct intel_device_info intel_i945gm_info = {
 105         .gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,
 106         .has_hotplug = 1, .cursor_needs_physical = 1,
 107         .has_overlay = 1, .overlay_needs_physical = 1,
 108         .supports_tv = 1,
 109         .has_fbc = 1,
 110         .ring_mask = RENDER_RING,
 111         GEN_DEFAULT_PIPEOFFSETS,
 112 };
 113
 114 static const struct intel_device_info intel_i965g_info = {
 115         .gen = 4, .is_broadwater = 1, .num_pipes = 2,
 116         .has_hotplug = 1,
 117         .has_overlay = 1,
 118         .ring_mask = RENDER_RING,
 119         GEN_DEFAULT_PIPEOFFSETS,
 120 };
 121
 122 static const struct intel_device_info intel_i965gm_info = {
 123         .gen = 4, .is_crestline = 1, .num_pipes = 2,
 124         .is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
 125         .has_overlay = 1,
 126         .supports_tv = 1,
 127         .ring_mask = RENDER_RING,
 128         GEN_DEFAULT_PIPEOFFSETS,
 129 };
 130
 131 static const struct intel_device_info intel_g33_info = {
 132         .gen = 3, .is_g33 = 1, .num_pipes = 2,
 133         .need_gfx_hws = 1, .has_hotplug = 1,
 134         .has_overlay = 1,
 135         .ring_mask = RENDER_RING,
 136         GEN_DEFAULT_PIPEOFFSETS,
 137 };
 138
 139 static const struct intel_device_info intel_g45_info = {
 140         .gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,
 141         .has_pipe_cxsr = 1, .has_hotplug = 1,
 142         .ring_mask = RENDER_RING | BSD_RING,
 143         GEN_DEFAULT_PIPEOFFSETS,
 144 };
 145
 146 static const struct intel_device_info intel_gm45_info = {
 147         .gen = 4, .is_g4x = 1, .num_pipes = 2,
 148         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
 149         .has_pipe_cxsr = 1, .has_hotplug = 1,
 150         .supports_tv = 1,
 151         .ring_mask = RENDER_RING | BSD_RING,
 152         GEN_DEFAULT_PIPEOFFSETS,
 153 };
 154
 155 static const struct intel_device_info intel_pineview_info = {
 156         .gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,
 157         .need_gfx_hws = 1, .has_hotplug = 1,
 158         .has_overlay = 1,
 159         GEN_DEFAULT_PIPEOFFSETS,
 160 };
 161
 162 static const struct intel_device_info intel_ironlake_d_info = {
 163         .gen = 5, .num_pipes = 2,
 164         .need_gfx_hws = 1, .has_hotplug = 1,
 165         .ring_mask = RENDER_RING | BSD_RING,
 166         GEN_DEFAULT_PIPEOFFSETS,
 167 };
 168
 169 static const struct intel_device_info intel_ironlake_m_info = {
 170         .gen = 5, .is_mobile = 1, .num_pipes = 2,
 171         .need_gfx_hws = 1, .has_hotplug = 1,
 172         .has_fbc = 1,
 173         .ring_mask = RENDER_RING | BSD_RING,
 174         GEN_DEFAULT_PIPEOFFSETS,
 175 };
 176
 177 static const struct intel_device_info intel_sandybridge_d_info = {
 178         .gen = 6, .num_pipes = 2,
 179         .need_gfx_hws = 1, .has_hotplug = 1,
 180         .has_fbc = 1,
 181         .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 182         .has_llc = 1,
 183         GEN_DEFAULT_PIPEOFFSETS,
 184 };
 185
 186 static const struct intel_device_info intel_sandybridge_m_info = {
 187         .gen = 6, .is_mobile = 1, .num_pipes = 2,
 188         .need_gfx_hws = 1, .has_hotplug = 1,
 189         .has_fbc = 1,
 190         .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 191         .has_llc = 1,
 192         GEN_DEFAULT_PIPEOFFSETS,
 193 };
 194
 195 #define GEN7_FEATURES  \
 196         .gen = 7, .num_pipes = 3, \
 197         .need_gfx_hws = 1, .has_hotplug = 1, \
 198         .has_fbc = 1, \
 199         .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
 200         .has_llc = 1
 201
 202 static const struct intel_device_info intel_ivybridge_d_info = {
 203         GEN7_FEATURES,
 204         .is_ivybridge = 1,
 205         GEN_DEFAULT_PIPEOFFSETS,
 206 };
 207
 208 static const struct intel_device_info intel_ivybridge_m_info = {
 209         GEN7_FEATURES,
 210         .is_ivybridge = 1,
 211         .is_mobile = 1,
 212         GEN_DEFAULT_PIPEOFFSETS,
 213 };
 214
 215 static const struct intel_device_info intel_ivybridge_q_info = {
 216         GEN7_FEATURES,
 217         .is_ivybridge = 1,
 218         .num_pipes = 0, /* legal, last one wins */
 219         GEN_DEFAULT_PIPEOFFSETS,
 220 };
 221
 222 static const struct intel_device_info intel_valleyview_m_info = {
 223         GEN7_FEATURES,
 224         .is_mobile = 1,
 225         .num_pipes = 2,
 226         .is_valleyview = 1,
 227         .display_mmio_offset = VLV_DISPLAY_BASE,
 228         .has_fbc = 0, /* legal, last one wins */
 229         .has_llc = 0, /* legal, last one wins */
 230         GEN_DEFAULT_PIPEOFFSETS,
 231 };
 232
 233 static const struct intel_device_info intel_valleyview_d_info = {
 234         GEN7_FEATURES,
 235         .num_pipes = 2,
 236         .is_valleyview = 1,
 237         .display_mmio_offset = VLV_DISPLAY_BASE,
 238         .has_fbc = 0, /* legal, last one wins */
 239         .has_llc = 0, /* legal, last one wins */
 240         GEN_DEFAULT_PIPEOFFSETS,
 241 };
 242
 243 static const struct intel_device_info intel_haswell_d_info = {
 244         GEN7_FEATURES,
 245         .is_haswell = 1,
 246         .has_ddi = 1,
 247         .has_fpga_dbg = 1,
 248         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 249         GEN_DEFAULT_PIPEOFFSETS,
 250 };
 251
 252 static const struct intel_device_info intel_haswell_m_info = {
 253         GEN7_FEATURES,
 254         .is_haswell = 1,
 255         .is_mobile = 1,
 256         .has_ddi = 1,
 257         .has_fpga_dbg = 1,
 258         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 259         GEN_DEFAULT_PIPEOFFSETS,
 260 };
 261
 262 static const struct intel_device_info intel_broadwell_d_info = {
 263         .gen = 8, .num_pipes = 3,
 264         .need_gfx_hws = 1, .has_hotplug = 1,
 265         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 266         .has_llc = 1,
 267         .has_ddi = 1,
 268         .has_fbc = 1,
 269         GEN_DEFAULT_PIPEOFFSETS,
 270 };
 271
 272 static const struct intel_device_info intel_broadwell_m_info = {
 273         .gen = 8, .is_mobile = 1, .num_pipes = 3,
 274         .need_gfx_hws = 1, .has_hotplug = 1,
 275         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 276         .has_llc = 1,
 277         .has_ddi = 1,
 278         .has_fbc = 1,
 279         GEN_DEFAULT_PIPEOFFSETS,
 280 };
 281
 282 /*
 283  * Make sure any device matches here are from most specific to most
 284  * general.  For example, since the Quanta match is based on the subsystem
 285  * and subvendor IDs, we need it to come before the more general IVB
 286  * PCI ID matches, otherwise we'll use the wrong info struct above.
 287  */
 288 #define INTEL_PCI_IDS \
 289         INTEL_I830_IDS(&intel_i830_info),       \
 290         INTEL_I845G_IDS(&intel_845g_info),      \
 291         INTEL_I85X_IDS(&intel_i85x_info),       \
 292         INTEL_I865G_IDS(&intel_i865g_info),     \
 293         INTEL_I915G_IDS(&intel_i915g_info),     \
 294         INTEL_I915GM_IDS(&intel_i915gm_info),   \
 295         INTEL_I945G_IDS(&intel_i945g_info),     \
 296         INTEL_I945GM_IDS(&intel_i945gm_info),   \
 297         INTEL_I965G_IDS(&intel_i965g_info),     \
 298         INTEL_G33_IDS(&intel_g33_info),         \
 299         INTEL_I965GM_IDS(&intel_i965gm_info),   \
 300         INTEL_GM45_IDS(&intel_gm45_info),       \
 301         INTEL_G45_IDS(&intel_g45_info),         \
 302         INTEL_PINEVIEW_IDS(&intel_pineview_info),       \
 303         INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),   \
 304         INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),   \
 305         INTEL_SNB_D_IDS(&intel_sandybridge_d_info),     \
 306         INTEL_SNB_M_IDS(&intel_sandybridge_m_info),     \
 307         INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
 308         INTEL_IVB_M_IDS(&intel_ivybridge_m_info),       \
 309         INTEL_IVB_D_IDS(&intel_ivybridge_d_info),       \
 310         INTEL_HSW_D_IDS(&intel_haswell_d_info), \
 311         INTEL_HSW_M_IDS(&intel_haswell_m_info), \
 312         INTEL_VLV_M_IDS(&intel_valleyview_m_info),      \
 313         INTEL_VLV_D_IDS(&intel_valleyview_d_info),      \
 314         INTEL_BDW_M_IDS(&intel_broadwell_m_info),       \
 315         INTEL_BDW_D_IDS(&intel_broadwell_d_info)
 316
 317 static const struct pci_device_id pciidlist[] = {               /* aka */
 318         INTEL_PCI_IDS,
 319         {0, 0, 0}
 320 };
 321
 322 #if defined(CONFIG_DRM_I915_KMS)
 323 MODULE_DEVICE_TABLE(pci, pciidlist);
 324 #endif
 325
 326 void intel_detect_pch(struct drm_device *dev)
 327 {
 328         struct drm_i915_private *dev_priv = dev->dev_private;
 329         struct pci_dev *pch = NULL;
 330
 331         /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
 332          * (which really amounts to a PCH but no South Display).
 333          */
 334         if (INTEL_INFO(dev)->num_pipes == 0) {
 335                 dev_priv->pch_type = PCH_NOP;
 336                 return;
 337         }
 338
 339         /*
 340          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 341          * make graphics device passthrough work easy for VMM, that only
 342          * need to expose ISA bridge to let driver know the real hardware
 343          * underneath. This is a requirement from virtualization team.
 344          *
 345          * In some virtualized environments (e.g. XEN), there is irrelevant
 346          * ISA bridge in the system. To work reliably, we should scan trhough
 347          * all the ISA bridge devices and check for the first match, instead
 348          * of only checking the first one.
 349          */
 350         while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
 351                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 352                         unsigned short id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 353                         dev_priv->pch_id = id;
 354
 355                         if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 356                                 dev_priv->pch_type = PCH_IBX;
 357                                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 358                                 WARN_ON(!IS_GEN5(dev));
 359                         } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 360                                 dev_priv->pch_type = PCH_CPT;
 361                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 362                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 363                         } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 364                                 /* PantherPoint is CPT compatible */
 365                                 dev_priv->pch_type = PCH_CPT;
 366                                 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
 367                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 368                         } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 369                                 dev_priv->pch_type = PCH_LPT;
 370                                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 371                                 WARN_ON(!IS_HASWELL(dev));
 372                                 WARN_ON(IS_ULT(dev));
 373                         } else if (IS_BROADWELL(dev)) {
 374                                 dev_priv->pch_type = PCH_LPT;
 375                                 dev_priv->pch_id =
 376                                         INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
 377                                 DRM_DEBUG_KMS("This is Broadwell, assuming "
 378                                               "LynxPoint LP PCH\n");
 379                         } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 380                                 dev_priv->pch_type = PCH_LPT;
 381                                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 382                                 WARN_ON(!IS_HASWELL(dev));
 383                                 WARN_ON(!IS_ULT(dev));
 384                         } else
 385                                 continue;
 386
 387                         break;
 388                 }
 389         }
 390         if (!pch)
 391                 DRM_DEBUG_KMS("No PCH found.\n");
 392
 393         pci_dev_put(pch);
 394 }
 395
 396 bool i915_semaphore_is_enabled(struct drm_device *dev)
 397 {
 398         if (INTEL_INFO(dev)->gen < 6)
 399                 return false;
 400
 401         if (i915.semaphores >= 0)
 402                 return i915.semaphores;
 403
 404         /* Until we get further testing... */
 405         if (IS_GEN8(dev))
 406                 return false;
 407
 408 #ifdef CONFIG_INTEL_IOMMU
 409         /* Enable semaphores on SNB when IO remapping is off */
 410         if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
 411                 return false;
 412 #endif
 413
 414         return true;
 415 }
 416
 417 static int i915_drm_freeze(struct drm_device *dev)
 418 {
 419         struct drm_i915_private *dev_priv = dev->dev_private;
 420         struct drm_crtc *crtc;
 421
 422         intel_runtime_pm_get(dev_priv);
 423
 424         /* ignore lid events during suspend */
 425         mutex_lock(&dev_priv->modeset_restore_lock);
 426         dev_priv->modeset_restore = MODESET_SUSPENDED;
 427         mutex_unlock(&dev_priv->modeset_restore_lock);
 428
 429         /* We do a lot of poking in a lot of registers, make sure they work
 430          * properly. */
 431         hsw_disable_package_c8(dev_priv);
 432         intel_display_set_init_power(dev_priv, true);
 433
 434         drm_kms_helper_poll_disable(dev);
 435
 436         pci_save_state(dev->pdev);
 437
 438         /* If KMS is active, we do the leavevt stuff here */
 439         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 440                 int error;
 441
 442                 error = i915_gem_suspend(dev);
 443                 if (error) {
 444                         dev_err(&dev->pdev->dev,
 445                                 "GEM idle failed, resume might fail\n");
 446                         return error;
 447                 }
 448
 449                 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
 450
 451                 drm_irq_uninstall(dev);
 452                 dev_priv->enable_hotplug_processing = false;
 453                 /*
 454                  * Disable CRTCs directly since we want to preserve sw state
 455                  * for _thaw.
 456                  */
 457                 mutex_lock(&dev->mode_config.mutex);
 458                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 459                         dev_priv->display.crtc_disable(crtc);
 460                 mutex_unlock(&dev->mode_config.mutex);
 461
 462                 intel_modeset_suspend_hw(dev);
 463         }
 464
 465         i915_gem_suspend_gtt_mappings(dev);
 466
 467         i915_save_state(dev);
 468
 469         intel_opregion_fini(dev);
 470         intel_uncore_fini(dev);
 471
 472         console_lock();
 473         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
 474         console_unlock();
 475
 476         dev_priv->suspend_count++;
 477
 478         return 0;
 479 }
 480
 481 int i915_suspend(struct drm_device *dev, pm_message_t state)
 482 {
 483         int error;
 484
 485         if (!dev || !dev->dev_private) {
 486                 DRM_ERROR("dev: %p\n", dev);
 487                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 488                 return -ENODEV;
 489         }
 490
 491         if (state.event == PM_EVENT_PRETHAW)
 492                 return 0;
 493
 494
 495         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 496                 return 0;
 497
 498         error = i915_drm_freeze(dev);
 499         if (error)
 500                 return error;
 501
 502         if (state.event == PM_EVENT_SUSPEND) {
 503                 /* Shut down the device */
 504                 pci_disable_device(dev->pdev);
 505                 pci_set_power_state(dev->pdev, PCI_D3hot);
 506         }
 507
 508         return 0;
 509 }
 510
 511 void intel_console_resume(struct work_struct *work)
 512 {
 513         struct drm_i915_private *dev_priv =
 514                 container_of(work, struct drm_i915_private,
 515                              console_resume_work);
 516         struct drm_device *dev = dev_priv->dev;
 517
 518         console_lock();
 519         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 520         console_unlock();
 521 }
 522
 523 static void intel_resume_hotplug(struct drm_device *dev)
 524 {
 525         struct drm_mode_config *mode_config = &dev->mode_config;
 526         struct intel_encoder *encoder;
 527
 528         mutex_lock(&mode_config->mutex);
 529         DRM_DEBUG_KMS("running encoder hotplug functions\n");
 530
 531         list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
 532                 if (encoder->hot_plug)
 533                         encoder->hot_plug(encoder);
 534
 535         mutex_unlock(&mode_config->mutex);
 536
 537         /* Just fire off a uevent and let userspace tell us what to do */
 538         drm_helper_hpd_irq_event(dev);
 539 }
 540
 541 static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
 542 {
 543         struct drm_i915_private *dev_priv = dev->dev_private;
 544         int error = 0;
 545
 546         intel_uncore_early_sanitize(dev);
 547
 548         intel_uncore_sanitize(dev);
 549
 550         if (drm_core_check_feature(dev, DRIVER_MODESET) &&
 551             restore_gtt_mappings) {
 552                 mutex_lock(&dev->struct_mutex);
 553                 i915_gem_restore_gtt_mappings(dev);
 554                 mutex_unlock(&dev->struct_mutex);
 555         }
 556
 557         intel_power_domains_init_hw(dev_priv);
 558
 559         i915_restore_state(dev);
 560         intel_opregion_setup(dev);
 561
 562         /* KMS EnterVT equivalent */
 563         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 564                 intel_init_pch_refclk(dev);
 565                 drm_mode_config_reset(dev);
 566
 567                 mutex_lock(&dev->struct_mutex);
 568
 569                 error = i915_gem_init_hw(dev);
 570                 mutex_unlock(&dev->struct_mutex);
 571
 572                 /* We need working interrupts for modeset enabling ... */
 573                 drm_irq_install(dev);
 574
 575                 intel_modeset_init_hw(dev);
 576
 577                 drm_modeset_lock_all(dev);
 578                 intel_modeset_setup_hw_state(dev, true);
 579                 drm_modeset_unlock_all(dev);
 580
 581                 /*
 582                  * ... but also need to make sure that hotplug processing
 583                  * doesn't cause havoc. Like in the driver load code we don't
 584                  * bother with the tiny race here where we might loose hotplug
 585                  * notifications.
 586                  * */
 587                 intel_hpd_init(dev);
 588                 dev_priv->enable_hotplug_processing = true;
 589                 /* Config may have changed between suspend and resume */
 590                 intel_resume_hotplug(dev);
 591         }
 592
 593         intel_opregion_init(dev);
 594
 595         /*
 596          * The console lock can be pretty contented on resume due
 597          * to all the printk activity.  Try to keep it out of the hot
 598          * path of resume if possible.
 599          */
 600         if (console_trylock()) {
 601                 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 602                 console_unlock();
 603         } else {
 604                 schedule_work(&dev_priv->console_resume_work);
 605         }
 606
 607         /* Undo what we did at i915_drm_freeze so the refcount goes back to the
 608          * expected level. */
 609         hsw_enable_package_c8(dev_priv);
 610
 611         mutex_lock(&dev_priv->modeset_restore_lock);
 612         dev_priv->modeset_restore = MODESET_DONE;
 613         mutex_unlock(&dev_priv->modeset_restore_lock);
 614
 615         intel_runtime_pm_put(dev_priv);
 616         return error;
 617 }
 618
 619 static int i915_drm_thaw(struct drm_device *dev)
 620 {
 621         if (drm_core_check_feature(dev, DRIVER_MODESET))
 622                 i915_check_and_clear_faults(dev);
 623
 624         return __i915_drm_thaw(dev, true);
 625 }
 626
 627 int i915_resume(struct drm_device *dev)
 628 {
 629         struct drm_i915_private *dev_priv = dev->dev_private;
 630         int ret;
 631
 632         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 633                 return 0;
 634
 635         if (pci_enable_device(dev->pdev))
 636                 return -EIO;
 637
 638         pci_set_master(dev->pdev);
 639
 640         /*
 641          * Platforms with opregion should have sane BIOS, older ones (gen3 and
 642          * earlier) need to restore the GTT mappings since the BIOS might clear
 643          * all our scratch PTEs.
 644          */
 645         ret = __i915_drm_thaw(dev, !dev_priv->opregion.header);
 646         if (ret)
 647                 return ret;
 648
 649         drm_kms_helper_poll_enable(dev);
 650         return 0;
 651 }
 652
 653 /**
 654  * i915_reset - reset chip after a hang
 655  * @dev: drm device to reset
 656  *
 657  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 658  * reset or otherwise an error code.
 659  *
 660  * Procedure is fairly simple:
 661  *   - reset the chip using the reset reg
 662  *   - re-init context state
 663  *   - re-init hardware status page
 664  *   - re-init ring buffer
 665  *   - re-init interrupt state
 666  *   - re-init display
 667  */
 668 int i915_reset(struct drm_device *dev)
 669 {
 670         drm_i915_private_t *dev_priv = dev->dev_private;
 671         bool simulated;
 672         int ret;
 673
 674         if (!i915.reset)
 675                 return 0;
 676
 677         mutex_lock(&dev->struct_mutex);
 678
 679         i915_gem_reset(dev);
 680
 681         simulated = dev_priv->gpu_error.stop_rings != 0;
 682
 683         ret = intel_gpu_reset(dev);
 684
 685         /* Also reset the gpu hangman. */
 686         if (simulated) {
 687                 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
 688                 dev_priv->gpu_error.stop_rings = 0;
 689                 if (ret == -ENODEV) {
 690                         DRM_INFO("Reset not implemented, but ignoring "
 691                                  "error for simulated gpu hangs\n");
 692                         ret = 0;
 693                 }
 694         }
 695
 696         if (ret) {
 697                 DRM_ERROR("Failed to reset chip: %i\n", ret);
 698                 mutex_unlock(&dev->struct_mutex);
 699                 return ret;
 700         }
 701
 702         /* Ok, now get things going again... */
 703
 704         /*
 705          * Everything depends on having the GTT running, so we need to start
 706          * there.  Fortunately we don't need to do this unless we reset the
 707          * chip at a PCI level.
 708          *
 709          * Next we need to restore the context, but we don't use those
 710          * yet either...
 711          *
 712          * Ring buffer needs to be re-initialized in the KMS case, or if X
 713          * was running at the time of the reset (i.e. we weren't VT
 714          * switched away).
 715          */
 716         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 717                         !dev_priv->ums.mm_suspended) {
 718                 dev_priv->ums.mm_suspended = 0;
 719
 720                 ret = i915_gem_init_hw(dev);
 721                 mutex_unlock(&dev->struct_mutex);
 722                 if (ret) {
 723                         DRM_ERROR("Failed hw init on reset %d\n", ret);
 724                         return ret;
 725                 }
 726
 727                 drm_irq_uninstall(dev);
 728                 drm_irq_install(dev);
 729
 730                 /* rps/rc6 re-init is necessary to restore state lost after the
 731                  * reset and the re-install of drm irq. Skip for ironlake per
 732                  * previous concerns that it doesn't respond well to some forms
 733                  * of re-init after reset. */
 734                 if (INTEL_INFO(dev)->gen > 5) {
 735                         mutex_lock(&dev->struct_mutex);
 736                         intel_enable_gt_powersave(dev);
 737                         mutex_unlock(&dev->struct_mutex);
 738                 }
 739
 740                 intel_hpd_init(dev);
 741         } else {
 742                 mutex_unlock(&dev->struct_mutex);
 743         }
 744
 745         return 0;
 746 }
 747
 748 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 749 {
 750         struct intel_device_info *intel_info =
 751                 (struct intel_device_info *) ent->driver_data;
 752
 753         if (IS_PRELIMINARY_HW(intel_info) && !i915.preliminary_hw_support) {
 754                 DRM_INFO("This hardware requires preliminary hardware support.\n"
 755                          "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
 756                 return -ENODEV;
 757         }
 758
 759         /* Only bind to function 0 of the device. Early generations
 760          * used function 1 as a placeholder for multi-head. This causes
 761          * us confusion instead, especially on the systems where both
 762          * functions have the same PCI-ID!
 763          */
 764         if (PCI_FUNC(pdev->devfn))
 765                 return -ENODEV;
 766
 767         driver.driver_features &= ~(DRIVER_USE_AGP);
 768
 769         return drm_get_pci_dev(pdev, ent, &driver);
 770 }
 771
 772 static void
 773 i915_pci_remove(struct pci_dev *pdev)
 774 {
 775         struct drm_device *dev = pci_get_drvdata(pdev);
 776
 777         drm_put_dev(dev);
 778 }
 779
 780 static int i915_pm_suspend(struct device *dev)
 781 {
 782         struct pci_dev *pdev = to_pci_dev(dev);
 783         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 784         int error;
 785
 786         if (!drm_dev || !drm_dev->dev_private) {
 787                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 788                 return -ENODEV;
 789         }
 790
 791         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 792                 return 0;
 793
 794         error = i915_drm_freeze(drm_dev);
 795         if (error)
 796                 return error;
 797
 798         pci_disable_device(pdev);
 799         pci_set_power_state(pdev, PCI_D3hot);
 800
 801         return 0;
 802 }
 803
 804 static int i915_pm_resume(struct device *dev)
 805 {
 806         struct pci_dev *pdev = to_pci_dev(dev);
 807         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 808
 809         return i915_resume(drm_dev);
 810 }
 811
 812 static int i915_pm_freeze(struct device *dev)
 813 {
 814         struct pci_dev *pdev = to_pci_dev(dev);
 815         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 816
 817         if (!drm_dev || !drm_dev->dev_private) {
 818                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 819                 return -ENODEV;
 820         }
 821
 822         return i915_drm_freeze(drm_dev);
 823 }
 824
 825 static int i915_pm_thaw(struct device *dev)
 826 {
 827         struct pci_dev *pdev = to_pci_dev(dev);
 828         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 829
 830         return i915_drm_thaw(drm_dev);
 831 }
 832
 833 static int i915_pm_poweroff(struct device *dev)
 834 {
 835         struct pci_dev *pdev = to_pci_dev(dev);
 836         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 837
 838         return i915_drm_freeze(drm_dev);
 839 }
 840
 841 static int i915_runtime_suspend(struct device *device)
 842 {
 843         struct pci_dev *pdev = to_pci_dev(device);
 844         struct drm_device *dev = pci_get_drvdata(pdev);
 845         struct drm_i915_private *dev_priv = dev->dev_private;
 846
 847         WARN_ON(!HAS_RUNTIME_PM(dev));
 848         assert_force_wake_inactive(dev_priv);
 849
 850         DRM_DEBUG_KMS("Suspending device\n");
 851
 852         if (HAS_PC8(dev))
 853                 __hsw_do_enable_pc8(dev_priv);
 854
 855         i915_gem_release_all_mmaps(dev_priv);
 856
 857         del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
 858         dev_priv->pm.suspended = true;
 859
 860         /*
 861          * current versions of firmware which depend on this opregion
 862          * notification have repurposed the D1 definition to mean
 863          * "runtime suspended" vs. what you would normally expect (D3)
 864          * to distinguish it from notifications that might be sent
 865          * via the suspend path.
 866          */
 867         intel_opregion_notify_adapter(dev, PCI_D1);
 868
 869         DRM_DEBUG_KMS("Device suspended\n");
 870         return 0;
 871 }
 872
 873 static int i915_runtime_resume(struct device *device)
 874 {
 875         struct pci_dev *pdev = to_pci_dev(device);
 876         struct drm_device *dev = pci_get_drvdata(pdev);
 877         struct drm_i915_private *dev_priv = dev->dev_private;
 878
 879         WARN_ON(!HAS_RUNTIME_PM(dev));
 880
 881         DRM_DEBUG_KMS("Resuming device\n");
 882
 883         intel_opregion_notify_adapter(dev, PCI_D0);
 884         dev_priv->pm.suspended = false;
 885
 886         if (HAS_PC8(dev))
 887                 __hsw_do_disable_pc8(dev_priv);
 888
 889         DRM_DEBUG_KMS("Device resumed\n");
 890         return 0;
 891 }
 892
 893 static const struct dev_pm_ops i915_pm_ops = {
 894         .suspend = i915_pm_suspend,
 895         .resume = i915_pm_resume,
 896         .freeze = i915_pm_freeze,
 897         .thaw = i915_pm_thaw,
 898         .poweroff = i915_pm_poweroff,
 899         .restore = i915_pm_resume,
 900         .runtime_suspend = i915_runtime_suspend,
 901         .runtime_resume = i915_runtime_resume,
 902 };
 903
 904 static const struct vm_operations_struct i915_gem_vm_ops = {
 905         .fault = i915_gem_fault,
 906         .open = drm_gem_vm_open,
 907         .close = drm_gem_vm_close,
 908 };
 909
 910 static const struct file_operations i915_driver_fops = {
 911         .owner = THIS_MODULE,
 912         .open = drm_open,
 913         .release = drm_release,
 914         .unlocked_ioctl = drm_ioctl,
 915         .mmap = drm_gem_mmap,
 916         .poll = drm_poll,
 917         .read = drm_read,
 918 #ifdef CONFIG_COMPAT
 919         .compat_ioctl = i915_compat_ioctl,
 920 #endif
 921         .llseek = noop_llseek,
 922 };
 923
 924 static struct drm_driver driver = {
 925         /* Don't use MTRRs here; the Xserver or userspace app should
 926          * deal with them for Intel hardware.
 927          */
 928         .driver_features =
 929             DRIVER_USE_AGP |
 930             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
 931             DRIVER_RENDER,
 932         .load = i915_driver_load,
 933         .unload = i915_driver_unload,
 934         .open = i915_driver_open,
 935         .lastclose = i915_driver_lastclose,
 936         .preclose = i915_driver_preclose,
 937         .postclose = i915_driver_postclose,
 938
 939         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
 940         .suspend = i915_suspend,
 941         .resume = i915_resume,
 942
 943         .device_is_agp = i915_driver_device_is_agp,
 944         .master_create = i915_master_create,
 945         .master_destroy = i915_master_destroy,
 946 #if defined(CONFIG_DEBUG_FS)
 947         .debugfs_init = i915_debugfs_init,
 948         .debugfs_cleanup = i915_debugfs_cleanup,
 949 #endif
 950         .gem_free_object = i915_gem_free_object,
 951         .gem_vm_ops = &i915_gem_vm_ops,
 952
 953         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 954         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 955         .gem_prime_export = i915_gem_prime_export,
 956         .gem_prime_import = i915_gem_prime_import,
 957
 958         .dumb_create = i915_gem_dumb_create,
 959         .dumb_map_offset = i915_gem_mmap_gtt,
 960         .dumb_destroy = drm_gem_dumb_destroy,
 961         .ioctls = i915_ioctls,
 962         .fops = &i915_driver_fops,
 963         .name = DRIVER_NAME,
 964         .desc = DRIVER_DESC,
 965         .date = DRIVER_DATE,
 966         .major = DRIVER_MAJOR,
 967         .minor = DRIVER_MINOR,
 968         .patchlevel = DRIVER_PATCHLEVEL,
 969 };
 970
 971 static struct pci_driver i915_pci_driver = {
 972         .name = DRIVER_NAME,
 973         .id_table = pciidlist,
 974         .probe = i915_pci_probe,
 975         .remove = i915_pci_remove,
 976         .driver.pm = &i915_pm_ops,
 977 };
 978
 979 static int __init i915_init(void)
 980 {
 981         driver.num_ioctls = i915_max_ioctl;
 982
 983         /*
 984          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 985          * explicitly disabled with the module pararmeter.
 986          *
 987          * Otherwise, just follow the parameter (defaulting to off).
 988          *
 989          * Allow optional vga_text_mode_force boot option to override
 990          * the default behavior.
 991          */
 992 #if defined(CONFIG_DRM_I915_KMS)
 993         if (i915.modeset != 0)
 994                 driver.driver_features |= DRIVER_MODESET;
 995 #endif
 996         if (i915.modeset == 1)
 997                 driver.driver_features |= DRIVER_MODESET;
 998
 999 #ifdef CONFIG_VGA_CONSOLE
1000         if (vgacon_text_force() && i915.modeset == -1)
1001                 driver.driver_features &= ~DRIVER_MODESET;
1002 #endif
1003
1004         if (!(driver.driver_features & DRIVER_MODESET)) {
1005                 driver.get_vblank_timestamp = NULL;
1006 #ifndef CONFIG_DRM_I915_UMS
1007                 /* Silently fail loading to not upset userspace. */
1008                 return 0;
1009 #endif
1010         }
1011
1012         return drm_pci_init(&driver, &i915_pci_driver);
1013 }
1014
1015 static void __exit i915_exit(void)
1016 {
1017 #ifndef CONFIG_DRM_I915_UMS
1018         if (!(driver.driver_features & DRIVER_MODESET))
1019                 return; /* Never loaded a driver. */
1020 #endif
1021
1022         drm_pci_exit(&driver, &i915_pci_driver);
1023 }
1024
1025 module_init(i915_init);
1026 module_exit(i915_exit);
1027
1028 MODULE_AUTHOR(DRIVER_AUTHOR);
1029 MODULE_DESCRIPTION(DRIVER_DESC);
1030 MODULE_LICENSE("GPL and additional rights");