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
 471         console_lock();
 472         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
 473         console_unlock();
 474
 475         dev_priv->suspend_count++;
 476
 477         return 0;
 478 }
 479
 480 int i915_suspend(struct drm_device *dev, pm_message_t state)
 481 {
 482         int error;
 483
 484         if (!dev || !dev->dev_private) {
 485                 DRM_ERROR("dev: %p\n", dev);
 486                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 487                 return -ENODEV;
 488         }
 489
 490         if (state.event == PM_EVENT_PRETHAW)
 491                 return 0;
 492
 493
 494         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 495                 return 0;
 496
 497         error = i915_drm_freeze(dev);
 498         if (error)
 499                 return error;
 500
 501         if (state.event == PM_EVENT_SUSPEND) {
 502                 /* Shut down the device */
 503                 pci_disable_device(dev->pdev);
 504                 pci_set_power_state(dev->pdev, PCI_D3hot);
 505         }
 506
 507         return 0;
 508 }
 509
 510 void intel_console_resume(struct work_struct *work)
 511 {
 512         struct drm_i915_private *dev_priv =
 513                 container_of(work, struct drm_i915_private,
 514                              console_resume_work);
 515         struct drm_device *dev = dev_priv->dev;
 516
 517         console_lock();
 518         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 519         console_unlock();
 520 }
 521
 522 static void intel_resume_hotplug(struct drm_device *dev)
 523 {
 524         struct drm_mode_config *mode_config = &dev->mode_config;
 525         struct intel_encoder *encoder;
 526
 527         mutex_lock(&mode_config->mutex);
 528         DRM_DEBUG_KMS("running encoder hotplug functions\n");
 529
 530         list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
 531                 if (encoder->hot_plug)
 532                         encoder->hot_plug(encoder);
 533
 534         mutex_unlock(&mode_config->mutex);
 535
 536         /* Just fire off a uevent and let userspace tell us what to do */
 537         drm_helper_hpd_irq_event(dev);
 538 }
 539
 540 static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
 541 {
 542         struct drm_i915_private *dev_priv = dev->dev_private;
 543         int error = 0;
 544
 545         intel_uncore_early_sanitize(dev);
 546
 547         intel_uncore_sanitize(dev);
 548
 549         if (drm_core_check_feature(dev, DRIVER_MODESET) &&
 550             restore_gtt_mappings) {
 551                 mutex_lock(&dev->struct_mutex);
 552                 i915_gem_restore_gtt_mappings(dev);
 553                 mutex_unlock(&dev->struct_mutex);
 554         }
 555
 556         intel_power_domains_init_hw(dev_priv);
 557
 558         i915_restore_state(dev);
 559         intel_opregion_setup(dev);
 560
 561         /* KMS EnterVT equivalent */
 562         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 563                 intel_init_pch_refclk(dev);
 564                 drm_mode_config_reset(dev);
 565
 566                 mutex_lock(&dev->struct_mutex);
 567
 568                 error = i915_gem_init_hw(dev);
 569                 mutex_unlock(&dev->struct_mutex);
 570
 571                 /* We need working interrupts for modeset enabling ... */
 572                 drm_irq_install(dev);
 573
 574                 intel_modeset_init_hw(dev);
 575
 576                 drm_modeset_lock_all(dev);
 577                 intel_modeset_setup_hw_state(dev, true);
 578                 drm_modeset_unlock_all(dev);
 579
 580                 /*
 581                  * ... but also need to make sure that hotplug processing
 582                  * doesn't cause havoc. Like in the driver load code we don't
 583                  * bother with the tiny race here where we might loose hotplug
 584                  * notifications.
 585                  * */
 586                 intel_hpd_init(dev);
 587                 dev_priv->enable_hotplug_processing = true;
 588                 /* Config may have changed between suspend and resume */
 589                 intel_resume_hotplug(dev);
 590         }
 591
 592         intel_opregion_init(dev);
 593
 594         /*
 595          * The console lock can be pretty contented on resume due
 596          * to all the printk activity.  Try to keep it out of the hot
 597          * path of resume if possible.
 598          */
 599         if (console_trylock()) {
 600                 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 601                 console_unlock();
 602         } else {
 603                 schedule_work(&dev_priv->console_resume_work);
 604         }
 605
 606         /* Undo what we did at i915_drm_freeze so the refcount goes back to the
 607          * expected level. */
 608         hsw_enable_package_c8(dev_priv);
 609
 610         mutex_lock(&dev_priv->modeset_restore_lock);
 611         dev_priv->modeset_restore = MODESET_DONE;
 612         mutex_unlock(&dev_priv->modeset_restore_lock);
 613
 614         intel_runtime_pm_put(dev_priv);
 615         return error;
 616 }
 617
 618 static int i915_drm_thaw(struct drm_device *dev)
 619 {
 620         if (drm_core_check_feature(dev, DRIVER_MODESET))
 621                 i915_check_and_clear_faults(dev);
 622
 623         return __i915_drm_thaw(dev, true);
 624 }
 625
 626 int i915_resume(struct drm_device *dev)
 627 {
 628         struct drm_i915_private *dev_priv = dev->dev_private;
 629         int ret;
 630
 631         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 632                 return 0;
 633
 634         if (pci_enable_device(dev->pdev))
 635                 return -EIO;
 636
 637         pci_set_master(dev->pdev);
 638
 639         /*
 640          * Platforms with opregion should have sane BIOS, older ones (gen3 and
 641          * earlier) need to restore the GTT mappings since the BIOS might clear
 642          * all our scratch PTEs.
 643          */
 644         ret = __i915_drm_thaw(dev, !dev_priv->opregion.header);
 645         if (ret)
 646                 return ret;
 647
 648         drm_kms_helper_poll_enable(dev);
 649         return 0;
 650 }
 651
 652 /**
 653  * i915_reset - reset chip after a hang
 654  * @dev: drm device to reset
 655  *
 656  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 657  * reset or otherwise an error code.
 658  *
 659  * Procedure is fairly simple:
 660  *   - reset the chip using the reset reg
 661  *   - re-init context state
 662  *   - re-init hardware status page
 663  *   - re-init ring buffer
 664  *   - re-init interrupt state
 665  *   - re-init display
 666  */
 667 int i915_reset(struct drm_device *dev)
 668 {
 669         drm_i915_private_t *dev_priv = dev->dev_private;
 670         bool simulated;
 671         int ret;
 672
 673         if (!i915.reset)
 674                 return 0;
 675
 676         mutex_lock(&dev->struct_mutex);
 677
 678         i915_gem_reset(dev);
 679
 680         simulated = dev_priv->gpu_error.stop_rings != 0;
 681
 682         ret = intel_gpu_reset(dev);
 683
 684         /* Also reset the gpu hangman. */
 685         if (simulated) {
 686                 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
 687                 dev_priv->gpu_error.stop_rings = 0;
 688                 if (ret == -ENODEV) {
 689                         DRM_INFO("Reset not implemented, but ignoring "
 690                                  "error for simulated gpu hangs\n");
 691                         ret = 0;
 692                 }
 693         }
 694
 695         if (ret) {
 696                 DRM_ERROR("Failed to reset chip: %i\n", ret);
 697                 mutex_unlock(&dev->struct_mutex);
 698                 return ret;
 699         }
 700
 701         /* Ok, now get things going again... */
 702
 703         /*
 704          * Everything depends on having the GTT running, so we need to start
 705          * there.  Fortunately we don't need to do this unless we reset the
 706          * chip at a PCI level.
 707          *
 708          * Next we need to restore the context, but we don't use those
 709          * yet either...
 710          *
 711          * Ring buffer needs to be re-initialized in the KMS case, or if X
 712          * was running at the time of the reset (i.e. we weren't VT
 713          * switched away).
 714          */
 715         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 716                         !dev_priv->ums.mm_suspended) {
 717                 dev_priv->ums.mm_suspended = 0;
 718
 719                 ret = i915_gem_init_hw(dev);
 720                 mutex_unlock(&dev->struct_mutex);
 721                 if (ret) {
 722                         DRM_ERROR("Failed hw init on reset %d\n", ret);
 723                         return ret;
 724                 }
 725
 726                 drm_irq_uninstall(dev);
 727                 drm_irq_install(dev);
 728
 729                 /* rps/rc6 re-init is necessary to restore state lost after the
 730                  * reset and the re-install of drm irq. Skip for ironlake per
 731                  * previous concerns that it doesn't respond well to some forms
 732                  * of re-init after reset. */
 733                 if (INTEL_INFO(dev)->gen > 5) {
 734                         mutex_lock(&dev->struct_mutex);
 735                         intel_enable_gt_powersave(dev);
 736                         mutex_unlock(&dev->struct_mutex);
 737                 }
 738
 739                 intel_hpd_init(dev);
 740         } else {
 741                 mutex_unlock(&dev->struct_mutex);
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 748 {
 749         struct intel_device_info *intel_info =
 750                 (struct intel_device_info *) ent->driver_data;
 751
 752         if (IS_PRELIMINARY_HW(intel_info) && !i915.preliminary_hw_support) {
 753                 DRM_INFO("This hardware requires preliminary hardware support.\n"
 754                          "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
 755                 return -ENODEV;
 756         }
 757
 758         /* Only bind to function 0 of the device. Early generations
 759          * used function 1 as a placeholder for multi-head. This causes
 760          * us confusion instead, especially on the systems where both
 761          * functions have the same PCI-ID!
 762          */
 763         if (PCI_FUNC(pdev->devfn))
 764                 return -ENODEV;
 765
 766         driver.driver_features &= ~(DRIVER_USE_AGP);
 767
 768         return drm_get_pci_dev(pdev, ent, &driver);
 769 }
 770
 771 static void
 772 i915_pci_remove(struct pci_dev *pdev)
 773 {
 774         struct drm_device *dev = pci_get_drvdata(pdev);
 775
 776         drm_put_dev(dev);
 777 }
 778
 779 static int i915_pm_suspend(struct device *dev)
 780 {
 781         struct pci_dev *pdev = to_pci_dev(dev);
 782         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 783         int error;
 784
 785         if (!drm_dev || !drm_dev->dev_private) {
 786                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 787                 return -ENODEV;
 788         }
 789
 790         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 791                 return 0;
 792
 793         error = i915_drm_freeze(drm_dev);
 794         if (error)
 795                 return error;
 796
 797         pci_disable_device(pdev);
 798         pci_set_power_state(pdev, PCI_D3hot);
 799
 800         return 0;
 801 }
 802
 803 static int i915_pm_resume(struct device *dev)
 804 {
 805         struct pci_dev *pdev = to_pci_dev(dev);
 806         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 807
 808         return i915_resume(drm_dev);
 809 }
 810
 811 static int i915_pm_freeze(struct device *dev)
 812 {
 813         struct pci_dev *pdev = to_pci_dev(dev);
 814         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 815
 816         if (!drm_dev || !drm_dev->dev_private) {
 817                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 818                 return -ENODEV;
 819         }
 820
 821         return i915_drm_freeze(drm_dev);
 822 }
 823
 824 static int i915_pm_thaw(struct device *dev)
 825 {
 826         struct pci_dev *pdev = to_pci_dev(dev);
 827         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 828
 829         return i915_drm_thaw(drm_dev);
 830 }
 831
 832 static int i915_pm_poweroff(struct device *dev)
 833 {
 834         struct pci_dev *pdev = to_pci_dev(dev);
 835         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 836
 837         return i915_drm_freeze(drm_dev);
 838 }
 839
 840 static int i915_runtime_suspend(struct device *device)
 841 {
 842         struct pci_dev *pdev = to_pci_dev(device);
 843         struct drm_device *dev = pci_get_drvdata(pdev);
 844         struct drm_i915_private *dev_priv = dev->dev_private;
 845
 846         WARN_ON(!HAS_RUNTIME_PM(dev));
 847         assert_force_wake_inactive(dev_priv);
 848
 849         DRM_DEBUG_KMS("Suspending device\n");
 850
 851         i915_gem_release_all_mmaps(dev_priv);
 852
 853         del_timer_sync(&dev_priv->gpu_error.hangcheck_timer);
 854         dev_priv->pm.suspended = true;
 855
 856         /*
 857          * current versions of firmware which depend on this opregion
 858          * notification have repurposed the D1 definition to mean
 859          * "runtime suspended" vs. what you would normally expect (D3)
 860          * to distinguish it from notifications that might be sent
 861          * via the suspend path.
 862          */
 863         intel_opregion_notify_adapter(dev, PCI_D1);
 864
 865         return 0;
 866 }
 867
 868 static int i915_runtime_resume(struct device *device)
 869 {
 870         struct pci_dev *pdev = to_pci_dev(device);
 871         struct drm_device *dev = pci_get_drvdata(pdev);
 872         struct drm_i915_private *dev_priv = dev->dev_private;
 873
 874         WARN_ON(!HAS_RUNTIME_PM(dev));
 875
 876         DRM_DEBUG_KMS("Resuming device\n");
 877
 878         intel_opregion_notify_adapter(dev, PCI_D0);
 879         dev_priv->pm.suspended = false;
 880
 881         return 0;
 882 }
 883
 884 static const struct dev_pm_ops i915_pm_ops = {
 885         .suspend = i915_pm_suspend,
 886         .resume = i915_pm_resume,
 887         .freeze = i915_pm_freeze,
 888         .thaw = i915_pm_thaw,
 889         .poweroff = i915_pm_poweroff,
 890         .restore = i915_pm_resume,
 891         .runtime_suspend = i915_runtime_suspend,
 892         .runtime_resume = i915_runtime_resume,
 893 };
 894
 895 static const struct vm_operations_struct i915_gem_vm_ops = {
 896         .fault = i915_gem_fault,
 897         .open = drm_gem_vm_open,
 898         .close = drm_gem_vm_close,
 899 };
 900
 901 static const struct file_operations i915_driver_fops = {
 902         .owner = THIS_MODULE,
 903         .open = drm_open,
 904         .release = drm_release,
 905         .unlocked_ioctl = drm_ioctl,
 906         .mmap = drm_gem_mmap,
 907         .poll = drm_poll,
 908         .read = drm_read,
 909 #ifdef CONFIG_COMPAT
 910         .compat_ioctl = i915_compat_ioctl,
 911 #endif
 912         .llseek = noop_llseek,
 913 };
 914
 915 static struct drm_driver driver = {
 916         /* Don't use MTRRs here; the Xserver or userspace app should
 917          * deal with them for Intel hardware.
 918          */
 919         .driver_features =
 920             DRIVER_USE_AGP |
 921             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
 922             DRIVER_RENDER,
 923         .load = i915_driver_load,
 924         .unload = i915_driver_unload,
 925         .open = i915_driver_open,
 926         .lastclose = i915_driver_lastclose,
 927         .preclose = i915_driver_preclose,
 928         .postclose = i915_driver_postclose,
 929
 930         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
 931         .suspend = i915_suspend,
 932         .resume = i915_resume,
 933
 934         .device_is_agp = i915_driver_device_is_agp,
 935         .master_create = i915_master_create,
 936         .master_destroy = i915_master_destroy,
 937 #if defined(CONFIG_DEBUG_FS)
 938         .debugfs_init = i915_debugfs_init,
 939         .debugfs_cleanup = i915_debugfs_cleanup,
 940 #endif
 941         .gem_free_object = i915_gem_free_object,
 942         .gem_vm_ops = &i915_gem_vm_ops,
 943
 944         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 945         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 946         .gem_prime_export = i915_gem_prime_export,
 947         .gem_prime_import = i915_gem_prime_import,
 948
 949         .dumb_create = i915_gem_dumb_create,
 950         .dumb_map_offset = i915_gem_mmap_gtt,
 951         .dumb_destroy = drm_gem_dumb_destroy,
 952         .ioctls = i915_ioctls,
 953         .fops = &i915_driver_fops,
 954         .name = DRIVER_NAME,
 955         .desc = DRIVER_DESC,
 956         .date = DRIVER_DATE,
 957         .major = DRIVER_MAJOR,
 958         .minor = DRIVER_MINOR,
 959         .patchlevel = DRIVER_PATCHLEVEL,
 960 };
 961
 962 static struct pci_driver i915_pci_driver = {
 963         .name = DRIVER_NAME,
 964         .id_table = pciidlist,
 965         .probe = i915_pci_probe,
 966         .remove = i915_pci_remove,
 967         .driver.pm = &i915_pm_ops,
 968 };
 969
 970 static int __init i915_init(void)
 971 {
 972         driver.num_ioctls = i915_max_ioctl;
 973
 974         /*
 975          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 976          * explicitly disabled with the module pararmeter.
 977          *
 978          * Otherwise, just follow the parameter (defaulting to off).
 979          *
 980          * Allow optional vga_text_mode_force boot option to override
 981          * the default behavior.
 982          */
 983 #if defined(CONFIG_DRM_I915_KMS)
 984         if (i915.modeset != 0)
 985                 driver.driver_features |= DRIVER_MODESET;
 986 #endif
 987         if (i915.modeset == 1)
 988                 driver.driver_features |= DRIVER_MODESET;
 989
 990 #ifdef CONFIG_VGA_CONSOLE
 991         if (vgacon_text_force() && i915.modeset == -1)
 992                 driver.driver_features &= ~DRIVER_MODESET;
 993 #endif
 994
 995         if (!(driver.driver_features & DRIVER_MODESET)) {
 996                 driver.get_vblank_timestamp = NULL;
 997 #ifndef CONFIG_DRM_I915_UMS
 998                 /* Silently fail loading to not upset userspace. */
 999                 return 0;
1000 #endif
1001         }
1002
1003         return drm_pci_init(&driver, &i915_pci_driver);
1004 }
1005
1006 static void __exit i915_exit(void)
1007 {
1008 #ifndef CONFIG_DRM_I915_UMS
1009         if (!(driver.driver_features & DRIVER_MODESET))
1010                 return; /* Never loaded a driver. */
1011 #endif
1012
1013         drm_pci_exit(&driver, &i915_pci_driver);
1014 }
1015
1016 module_init(i915_init);
1017 module_exit(i915_exit);
1018
1019 MODULE_AUTHOR(DRIVER_AUTHOR);
1020 MODULE_DESCRIPTION(DRIVER_DESC);
1021 MODULE_LICENSE("GPL and additional rights");