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 int i915_modeset __read_mostly = -1;
  42 module_param_named(modeset, i915_modeset, int, 0400);
  43 MODULE_PARM_DESC(modeset,
  44                 "Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
  45                 "1=on, -1=force vga console preference [default])");
  46
  47 unsigned int i915_fbpercrtc __always_unused = 0;
  48 module_param_named(fbpercrtc, i915_fbpercrtc, int, 0400);
  49
  50 int i915_panel_ignore_lid __read_mostly = 1;
  51 module_param_named(panel_ignore_lid, i915_panel_ignore_lid, int, 0600);
  52 MODULE_PARM_DESC(panel_ignore_lid,
  53                 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
  54                 "-1=force lid closed, -2=force lid open)");
  55
  56 unsigned int i915_powersave __read_mostly = 1;
  57 module_param_named(powersave, i915_powersave, int, 0600);
  58 MODULE_PARM_DESC(powersave,
  59                 "Enable powersavings, fbc, downclocking, etc. (default: true)");
  60
  61 int i915_semaphores __read_mostly = -1;
  62 module_param_named(semaphores, i915_semaphores, int, 0600);
  63 MODULE_PARM_DESC(semaphores,
  64                 "Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))");
  65
  66 int i915_enable_rc6 __read_mostly = -1;
  67 module_param_named(i915_enable_rc6, i915_enable_rc6, int, 0400);
  68 MODULE_PARM_DESC(i915_enable_rc6,
  69                 "Enable power-saving render C-state 6. "
  70                 "Different stages can be selected via bitmask values "
  71                 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
  72                 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
  73                 "default: -1 (use per-chip default)");
  74
  75 int i915_enable_fbc __read_mostly = -1;
  76 module_param_named(i915_enable_fbc, i915_enable_fbc, int, 0600);
  77 MODULE_PARM_DESC(i915_enable_fbc,
  78                 "Enable frame buffer compression for power savings "
  79                 "(default: -1 (use per-chip default))");
  80
  81 unsigned int i915_lvds_downclock __read_mostly = 0;
  82 module_param_named(lvds_downclock, i915_lvds_downclock, int, 0400);
  83 MODULE_PARM_DESC(lvds_downclock,
  84                 "Use panel (LVDS/eDP) downclocking for power savings "
  85                 "(default: false)");
  86
  87 int i915_lvds_channel_mode __read_mostly;
  88 module_param_named(lvds_channel_mode, i915_lvds_channel_mode, int, 0600);
  89 MODULE_PARM_DESC(lvds_channel_mode,
  90                  "Specify LVDS channel mode "
  91                  "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
  92
  93 int i915_panel_use_ssc __read_mostly = -1;
  94 module_param_named(lvds_use_ssc, i915_panel_use_ssc, int, 0600);
  95 MODULE_PARM_DESC(lvds_use_ssc,
  96                 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
  97                 "(default: auto from VBT)");
  98
  99 int i915_vbt_sdvo_panel_type __read_mostly = -1;
 100 module_param_named(vbt_sdvo_panel_type, i915_vbt_sdvo_panel_type, int, 0600);
 101 MODULE_PARM_DESC(vbt_sdvo_panel_type,
 102                 "Override/Ignore selection of SDVO panel mode in the VBT "
 103                 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
 104
 105 static bool i915_try_reset __read_mostly = true;
 106 module_param_named(reset, i915_try_reset, bool, 0600);
 107 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
 108
 109 bool i915_enable_hangcheck __read_mostly = true;
 110 module_param_named(enable_hangcheck, i915_enable_hangcheck, bool, 0644);
 111 MODULE_PARM_DESC(enable_hangcheck,
 112                 "Periodically check GPU activity for detecting hangs. "
 113                 "WARNING: Disabling this can cause system wide hangs. "
 114                 "(default: true)");
 115
 116 int i915_enable_ppgtt __read_mostly = -1;
 117 module_param_named(i915_enable_ppgtt, i915_enable_ppgtt, int, 0600);
 118 MODULE_PARM_DESC(i915_enable_ppgtt,
 119                 "Enable PPGTT (default: true)");
 120
 121 int i915_enable_psr __read_mostly = 0;
 122 module_param_named(enable_psr, i915_enable_psr, int, 0600);
 123 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
 124
 125 unsigned int i915_preliminary_hw_support __read_mostly = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT);
 126 module_param_named(preliminary_hw_support, i915_preliminary_hw_support, int, 0600);
 127 MODULE_PARM_DESC(preliminary_hw_support,
 128                 "Enable preliminary hardware support.");
 129
 130 int i915_disable_power_well __read_mostly = 1;
 131 module_param_named(disable_power_well, i915_disable_power_well, int, 0600);
 132 MODULE_PARM_DESC(disable_power_well,
 133                  "Disable the power well when possible (default: true)");
 134
 135 int i915_enable_ips __read_mostly = 1;
 136 module_param_named(enable_ips, i915_enable_ips, int, 0600);
 137 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
 138
 139 bool i915_fastboot __read_mostly = 0;
 140 module_param_named(fastboot, i915_fastboot, bool, 0600);
 141 MODULE_PARM_DESC(fastboot, "Try to skip unnecessary mode sets at boot time "
 142                  "(default: false)");
 143
 144 int i915_enable_pc8 __read_mostly = 1;
 145 module_param_named(enable_pc8, i915_enable_pc8, int, 0600);
 146 MODULE_PARM_DESC(enable_pc8, "Enable support for low power package C states (PC8+) (default: true)");
 147
 148 int i915_pc8_timeout __read_mostly = 5000;
 149 module_param_named(pc8_timeout, i915_pc8_timeout, int, 0600);
 150 MODULE_PARM_DESC(pc8_timeout, "Number of msecs of idleness required to enter PC8+ (default: 5000)");
 151
 152 bool i915_prefault_disable __read_mostly;
 153 module_param_named(prefault_disable, i915_prefault_disable, bool, 0600);
 154 MODULE_PARM_DESC(prefault_disable,
 155                 "Disable page prefaulting for pread/pwrite/reloc (default:false). For developers only.");
 156
 157 static struct drm_driver driver;
 158 extern int intel_agp_enabled;
 159
 160 static const struct intel_device_info intel_i830_info = {
 161         .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 162         .has_overlay = 1, .overlay_needs_physical = 1,
 163 };
 164
 165 static const struct intel_device_info intel_845g_info = {
 166         .gen = 2, .num_pipes = 1,
 167         .has_overlay = 1, .overlay_needs_physical = 1,
 168 };
 169
 170 static const struct intel_device_info intel_i85x_info = {
 171         .gen = 2, .is_i85x = 1, .is_mobile = 1, .num_pipes = 2,
 172         .cursor_needs_physical = 1,
 173         .has_overlay = 1, .overlay_needs_physical = 1,
 174 };
 175
 176 static const struct intel_device_info intel_i865g_info = {
 177         .gen = 2, .num_pipes = 1,
 178         .has_overlay = 1, .overlay_needs_physical = 1,
 179 };
 180
 181 static const struct intel_device_info intel_i915g_info = {
 182         .gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 183         .has_overlay = 1, .overlay_needs_physical = 1,
 184 };
 185 static const struct intel_device_info intel_i915gm_info = {
 186         .gen = 3, .is_mobile = 1, .num_pipes = 2,
 187         .cursor_needs_physical = 1,
 188         .has_overlay = 1, .overlay_needs_physical = 1,
 189         .supports_tv = 1,
 190 };
 191 static const struct intel_device_info intel_i945g_info = {
 192         .gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 193         .has_overlay = 1, .overlay_needs_physical = 1,
 194 };
 195 static const struct intel_device_info intel_i945gm_info = {
 196         .gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,
 197         .has_hotplug = 1, .cursor_needs_physical = 1,
 198         .has_overlay = 1, .overlay_needs_physical = 1,
 199         .supports_tv = 1,
 200 };
 201
 202 static const struct intel_device_info intel_i965g_info = {
 203         .gen = 4, .is_broadwater = 1, .num_pipes = 2,
 204         .has_hotplug = 1,
 205         .has_overlay = 1,
 206 };
 207
 208 static const struct intel_device_info intel_i965gm_info = {
 209         .gen = 4, .is_crestline = 1, .num_pipes = 2,
 210         .is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
 211         .has_overlay = 1,
 212         .supports_tv = 1,
 213 };
 214
 215 static const struct intel_device_info intel_g33_info = {
 216         .gen = 3, .is_g33 = 1, .num_pipes = 2,
 217         .need_gfx_hws = 1, .has_hotplug = 1,
 218         .has_overlay = 1,
 219 };
 220
 221 static const struct intel_device_info intel_g45_info = {
 222         .gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,
 223         .has_pipe_cxsr = 1, .has_hotplug = 1,
 224         .has_bsd_ring = 1,
 225 };
 226
 227 static const struct intel_device_info intel_gm45_info = {
 228         .gen = 4, .is_g4x = 1, .num_pipes = 2,
 229         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
 230         .has_pipe_cxsr = 1, .has_hotplug = 1,
 231         .supports_tv = 1,
 232         .has_bsd_ring = 1,
 233 };
 234
 235 static const struct intel_device_info intel_pineview_info = {
 236         .gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,
 237         .need_gfx_hws = 1, .has_hotplug = 1,
 238         .has_overlay = 1,
 239 };
 240
 241 static const struct intel_device_info intel_ironlake_d_info = {
 242         .gen = 5, .num_pipes = 2,
 243         .need_gfx_hws = 1, .has_hotplug = 1,
 244         .has_bsd_ring = 1,
 245 };
 246
 247 static const struct intel_device_info intel_ironlake_m_info = {
 248         .gen = 5, .is_mobile = 1, .num_pipes = 2,
 249         .need_gfx_hws = 1, .has_hotplug = 1,
 250         .has_fbc = 1,
 251         .has_bsd_ring = 1,
 252 };
 253
 254 static const struct intel_device_info intel_sandybridge_d_info = {
 255         .gen = 6, .num_pipes = 2,
 256         .need_gfx_hws = 1, .has_hotplug = 1,
 257         .has_bsd_ring = 1,
 258         .has_blt_ring = 1,
 259         .has_llc = 1,
 260 };
 261
 262 static const struct intel_device_info intel_sandybridge_m_info = {
 263         .gen = 6, .is_mobile = 1, .num_pipes = 2,
 264         .need_gfx_hws = 1, .has_hotplug = 1,
 265         .has_fbc = 1,
 266         .has_bsd_ring = 1,
 267         .has_blt_ring = 1,
 268         .has_llc = 1,
 269 };
 270
 271 #define GEN7_FEATURES  \
 272         .gen = 7, .num_pipes = 3, \
 273         .need_gfx_hws = 1, .has_hotplug = 1, \
 274         .has_bsd_ring = 1, \
 275         .has_blt_ring = 1, \
 276         .has_llc = 1
 277
 278 static const struct intel_device_info intel_ivybridge_d_info = {
 279         GEN7_FEATURES,
 280         .is_ivybridge = 1,
 281 };
 282
 283 static const struct intel_device_info intel_ivybridge_m_info = {
 284         GEN7_FEATURES,
 285         .is_ivybridge = 1,
 286         .is_mobile = 1,
 287         .has_fbc = 1,
 288 };
 289
 290 static const struct intel_device_info intel_ivybridge_q_info = {
 291         GEN7_FEATURES,
 292         .is_ivybridge = 1,
 293         .num_pipes = 0, /* legal, last one wins */
 294 };
 295
 296 static const struct intel_device_info intel_valleyview_m_info = {
 297         GEN7_FEATURES,
 298         .is_mobile = 1,
 299         .num_pipes = 2,
 300         .is_valleyview = 1,
 301         .display_mmio_offset = VLV_DISPLAY_BASE,
 302         .has_llc = 0, /* legal, last one wins */
 303 };
 304
 305 static const struct intel_device_info intel_valleyview_d_info = {
 306         GEN7_FEATURES,
 307         .num_pipes = 2,
 308         .is_valleyview = 1,
 309         .display_mmio_offset = VLV_DISPLAY_BASE,
 310         .has_llc = 0, /* legal, last one wins */
 311 };
 312
 313 static const struct intel_device_info intel_haswell_d_info = {
 314         GEN7_FEATURES,
 315         .is_haswell = 1,
 316         .has_ddi = 1,
 317         .has_fpga_dbg = 1,
 318         .has_vebox_ring = 1,
 319 };
 320
 321 static const struct intel_device_info intel_haswell_m_info = {
 322         GEN7_FEATURES,
 323         .is_haswell = 1,
 324         .is_mobile = 1,
 325         .has_ddi = 1,
 326         .has_fpga_dbg = 1,
 327         .has_fbc = 1,
 328         .has_vebox_ring = 1,
 329 };
 330
 331 /*
 332  * Make sure any device matches here are from most specific to most
 333  * general.  For example, since the Quanta match is based on the subsystem
 334  * and subvendor IDs, we need it to come before the more general IVB
 335  * PCI ID matches, otherwise we'll use the wrong info struct above.
 336  */
 337 #define INTEL_PCI_IDS \
 338         INTEL_I830_IDS(&intel_i830_info),       \
 339         INTEL_I845G_IDS(&intel_845g_info),      \
 340         INTEL_I85X_IDS(&intel_i85x_info),       \
 341         INTEL_I865G_IDS(&intel_i865g_info),     \
 342         INTEL_I915G_IDS(&intel_i915g_info),     \
 343         INTEL_I915GM_IDS(&intel_i915gm_info),   \
 344         INTEL_I945G_IDS(&intel_i945g_info),     \
 345         INTEL_I945GM_IDS(&intel_i945gm_info),   \
 346         INTEL_I965G_IDS(&intel_i965g_info),     \
 347         INTEL_G33_IDS(&intel_g33_info),         \
 348         INTEL_I965GM_IDS(&intel_i965gm_info),   \
 349         INTEL_GM45_IDS(&intel_gm45_info),       \
 350         INTEL_G45_IDS(&intel_g45_info),         \
 351         INTEL_PINEVIEW_IDS(&intel_pineview_info),       \
 352         INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),   \
 353         INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),   \
 354         INTEL_SNB_D_IDS(&intel_sandybridge_d_info),     \
 355         INTEL_SNB_M_IDS(&intel_sandybridge_m_info),     \
 356         INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
 357         INTEL_IVB_M_IDS(&intel_ivybridge_m_info),       \
 358         INTEL_IVB_D_IDS(&intel_ivybridge_d_info),       \
 359         INTEL_HSW_D_IDS(&intel_haswell_d_info), \
 360         INTEL_HSW_M_IDS(&intel_haswell_m_info), \
 361         INTEL_VLV_M_IDS(&intel_valleyview_m_info),      \
 362         INTEL_VLV_D_IDS(&intel_valleyview_d_info)
 363
 364 static const struct pci_device_id pciidlist[] = {               /* aka */
 365         INTEL_PCI_IDS,
 366         {0, 0, 0}
 367 };
 368
 369 #if defined(CONFIG_DRM_I915_KMS)
 370 MODULE_DEVICE_TABLE(pci, pciidlist);
 371 #endif
 372
 373 void intel_detect_pch(struct drm_device *dev)
 374 {
 375         struct drm_i915_private *dev_priv = dev->dev_private;
 376         struct pci_dev *pch;
 377
 378         /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
 379          * (which really amounts to a PCH but no South Display).
 380          */
 381         if (INTEL_INFO(dev)->num_pipes == 0) {
 382                 dev_priv->pch_type = PCH_NOP;
 383                 return;
 384         }
 385
 386         /*
 387          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 388          * make graphics device passthrough work easy for VMM, that only
 389          * need to expose ISA bridge to let driver know the real hardware
 390          * underneath. This is a requirement from virtualization team.
 391          *
 392          * In some virtualized environments (e.g. XEN), there is irrelevant
 393          * ISA bridge in the system. To work reliably, we should scan trhough
 394          * all the ISA bridge devices and check for the first match, instead
 395          * of only checking the first one.
 396          */
 397         pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
 398         while (pch) {
 399                 struct pci_dev *curr = pch;
 400                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 401                         unsigned short id;
 402                         id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 403                         dev_priv->pch_id = id;
 404
 405                         if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 406                                 dev_priv->pch_type = PCH_IBX;
 407                                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 408                                 WARN_ON(!IS_GEN5(dev));
 409                         } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 410                                 dev_priv->pch_type = PCH_CPT;
 411                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 412                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 413                         } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 414                                 /* PantherPoint is CPT compatible */
 415                                 dev_priv->pch_type = PCH_CPT;
 416                                 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
 417                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 418                         } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 419                                 dev_priv->pch_type = PCH_LPT;
 420                                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 421                                 WARN_ON(!IS_HASWELL(dev));
 422                                 WARN_ON(IS_ULT(dev));
 423                         } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 424                                 dev_priv->pch_type = PCH_LPT;
 425                                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 426                                 WARN_ON(!IS_HASWELL(dev));
 427                                 WARN_ON(!IS_ULT(dev));
 428                         } else {
 429                                 goto check_next;
 430                         }
 431                         pci_dev_put(pch);
 432                         break;
 433                 }
 434 check_next:
 435                 pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, curr);
 436                 pci_dev_put(curr);
 437         }
 438         if (!pch)
 439                 DRM_DEBUG_KMS("No PCH found?\n");
 440 }
 441
 442 bool i915_semaphore_is_enabled(struct drm_device *dev)
 443 {
 444         if (INTEL_INFO(dev)->gen < 6)
 445                 return 0;
 446
 447         if (i915_semaphores >= 0)
 448                 return i915_semaphores;
 449
 450 #ifdef CONFIG_INTEL_IOMMU
 451         /* Enable semaphores on SNB when IO remapping is off */
 452         if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
 453                 return false;
 454 #endif
 455
 456         return 1;
 457 }
 458
 459 static int i915_drm_freeze(struct drm_device *dev)
 460 {
 461         struct drm_i915_private *dev_priv = dev->dev_private;
 462         struct drm_crtc *crtc;
 463
 464         /* ignore lid events during suspend */
 465         mutex_lock(&dev_priv->modeset_restore_lock);
 466         dev_priv->modeset_restore = MODESET_SUSPENDED;
 467         mutex_unlock(&dev_priv->modeset_restore_lock);
 468
 469         /* We do a lot of poking in a lot of registers, make sure they work
 470          * properly. */
 471         hsw_disable_package_c8(dev_priv);
 472         intel_set_power_well(dev, true);
 473
 474         drm_kms_helper_poll_disable(dev);
 475
 476         pci_save_state(dev->pdev);
 477
 478         /* If KMS is active, we do the leavevt stuff here */
 479         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 480                 int error;
 481
 482                 mutex_lock(&dev->struct_mutex);
 483                 error = i915_gem_idle(dev);
 484                 mutex_unlock(&dev->struct_mutex);
 485                 if (error) {
 486                         dev_err(&dev->pdev->dev,
 487                                 "GEM idle failed, resume might fail\n");
 488                         return error;
 489                 }
 490
 491                 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
 492
 493                 drm_irq_uninstall(dev);
 494                 dev_priv->enable_hotplug_processing = false;
 495                 /*
 496                  * Disable CRTCs directly since we want to preserve sw state
 497                  * for _thaw.
 498                  */
 499                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 500                         dev_priv->display.crtc_disable(crtc);
 501
 502                 intel_modeset_suspend_hw(dev);
 503         }
 504
 505         i915_save_state(dev);
 506
 507         intel_opregion_fini(dev);
 508
 509         console_lock();
 510         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
 511         console_unlock();
 512
 513         return 0;
 514 }
 515
 516 int i915_suspend(struct drm_device *dev, pm_message_t state)
 517 {
 518         int error;
 519
 520         if (!dev || !dev->dev_private) {
 521                 DRM_ERROR("dev: %p\n", dev);
 522                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 523                 return -ENODEV;
 524         }
 525
 526         if (state.event == PM_EVENT_PRETHAW)
 527                 return 0;
 528
 529
 530         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 531                 return 0;
 532
 533         error = i915_drm_freeze(dev);
 534         if (error)
 535                 return error;
 536
 537         if (state.event == PM_EVENT_SUSPEND) {
 538                 /* Shut down the device */
 539                 pci_disable_device(dev->pdev);
 540                 pci_set_power_state(dev->pdev, PCI_D3hot);
 541         }
 542
 543         return 0;
 544 }
 545
 546 void intel_console_resume(struct work_struct *work)
 547 {
 548         struct drm_i915_private *dev_priv =
 549                 container_of(work, struct drm_i915_private,
 550                              console_resume_work);
 551         struct drm_device *dev = dev_priv->dev;
 552
 553         console_lock();
 554         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 555         console_unlock();
 556 }
 557
 558 static void intel_resume_hotplug(struct drm_device *dev)
 559 {
 560         struct drm_mode_config *mode_config = &dev->mode_config;
 561         struct intel_encoder *encoder;
 562
 563         mutex_lock(&mode_config->mutex);
 564         DRM_DEBUG_KMS("running encoder hotplug functions\n");
 565
 566         list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
 567                 if (encoder->hot_plug)
 568                         encoder->hot_plug(encoder);
 569
 570         mutex_unlock(&mode_config->mutex);
 571
 572         /* Just fire off a uevent and let userspace tell us what to do */
 573         drm_helper_hpd_irq_event(dev);
 574 }
 575
 576 static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
 577 {
 578         struct drm_i915_private *dev_priv = dev->dev_private;
 579         int error = 0;
 580
 581         intel_uncore_early_sanitize(dev);
 582
 583         intel_uncore_sanitize(dev);
 584
 585         if (drm_core_check_feature(dev, DRIVER_MODESET) &&
 586             restore_gtt_mappings) {
 587                 mutex_lock(&dev->struct_mutex);
 588                 i915_gem_restore_gtt_mappings(dev);
 589                 mutex_unlock(&dev->struct_mutex);
 590         }
 591
 592         intel_init_power_well(dev);
 593
 594         i915_restore_state(dev);
 595         intel_opregion_setup(dev);
 596
 597         /* KMS EnterVT equivalent */
 598         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 599                 intel_init_pch_refclk(dev);
 600
 601                 mutex_lock(&dev->struct_mutex);
 602
 603                 error = i915_gem_init_hw(dev);
 604                 mutex_unlock(&dev->struct_mutex);
 605
 606                 /* We need working interrupts for modeset enabling ... */
 607                 drm_irq_install(dev);
 608
 609                 intel_modeset_init_hw(dev);
 610
 611                 drm_modeset_lock_all(dev);
 612                 intel_modeset_setup_hw_state(dev, true);
 613                 drm_modeset_unlock_all(dev);
 614
 615                 /*
 616                  * ... but also need to make sure that hotplug processing
 617                  * doesn't cause havoc. Like in the driver load code we don't
 618                  * bother with the tiny race here where we might loose hotplug
 619                  * notifications.
 620                  * */
 621                 intel_hpd_init(dev);
 622                 dev_priv->enable_hotplug_processing = true;
 623                 /* Config may have changed between suspend and resume */
 624                 intel_resume_hotplug(dev);
 625         }
 626
 627         intel_opregion_init(dev);
 628
 629         /*
 630          * The console lock can be pretty contented on resume due
 631          * to all the printk activity.  Try to keep it out of the hot
 632          * path of resume if possible.
 633          */
 634         if (console_trylock()) {
 635                 intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING);
 636                 console_unlock();
 637         } else {
 638                 schedule_work(&dev_priv->console_resume_work);
 639         }
 640
 641         /* Undo what we did at i915_drm_freeze so the refcount goes back to the
 642          * expected level. */
 643         hsw_enable_package_c8(dev_priv);
 644
 645         mutex_lock(&dev_priv->modeset_restore_lock);
 646         dev_priv->modeset_restore = MODESET_DONE;
 647         mutex_unlock(&dev_priv->modeset_restore_lock);
 648         return error;
 649 }
 650
 651 static int i915_drm_thaw(struct drm_device *dev)
 652 {
 653         return __i915_drm_thaw(dev, true);
 654 }
 655
 656 int i915_resume(struct drm_device *dev)
 657 {
 658         struct drm_i915_private *dev_priv = dev->dev_private;
 659         int ret;
 660
 661         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 662                 return 0;
 663
 664         if (pci_enable_device(dev->pdev))
 665                 return -EIO;
 666
 667         pci_set_master(dev->pdev);
 668
 669         /*
 670          * Platforms with opregion should have sane BIOS, older ones (gen3 and
 671          * earlier) need to restore the GTT mappings since the BIOS might clear
 672          * all our scratch PTEs.
 673          */
 674         ret = __i915_drm_thaw(dev, !dev_priv->opregion.header);
 675         if (ret)
 676                 return ret;
 677
 678         drm_kms_helper_poll_enable(dev);
 679         return 0;
 680 }
 681
 682 /**
 683  * i915_reset - reset chip after a hang
 684  * @dev: drm device to reset
 685  *
 686  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 687  * reset or otherwise an error code.
 688  *
 689  * Procedure is fairly simple:
 690  *   - reset the chip using the reset reg
 691  *   - re-init context state
 692  *   - re-init hardware status page
 693  *   - re-init ring buffer
 694  *   - re-init interrupt state
 695  *   - re-init display
 696  */
 697 int i915_reset(struct drm_device *dev)
 698 {
 699         drm_i915_private_t *dev_priv = dev->dev_private;
 700         bool simulated;
 701         int ret;
 702
 703         if (!i915_try_reset)
 704                 return 0;
 705
 706         mutex_lock(&dev->struct_mutex);
 707
 708         i915_gem_reset(dev);
 709
 710         simulated = dev_priv->gpu_error.stop_rings != 0;
 711
 712         ret = intel_gpu_reset(dev);
 713
 714         /* Also reset the gpu hangman. */
 715         if (simulated) {
 716                 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
 717                 dev_priv->gpu_error.stop_rings = 0;
 718                 if (ret == -ENODEV) {
 719                         DRM_ERROR("Reset not implemented, but ignoring "
 720                                   "error for simulated gpu hangs\n");
 721                         ret = 0;
 722                 }
 723         }
 724
 725         if (ret) {
 726                 DRM_ERROR("Failed to reset chip.\n");
 727                 mutex_unlock(&dev->struct_mutex);
 728                 return ret;
 729         }
 730
 731         /* Ok, now get things going again... */
 732
 733         /*
 734          * Everything depends on having the GTT running, so we need to start
 735          * there.  Fortunately we don't need to do this unless we reset the
 736          * chip at a PCI level.
 737          *
 738          * Next we need to restore the context, but we don't use those
 739          * yet either...
 740          *
 741          * Ring buffer needs to be re-initialized in the KMS case, or if X
 742          * was running at the time of the reset (i.e. we weren't VT
 743          * switched away).
 744          */
 745         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 746                         !dev_priv->ums.mm_suspended) {
 747                 struct intel_ring_buffer *ring;
 748                 int i;
 749
 750                 dev_priv->ums.mm_suspended = 0;
 751
 752                 i915_gem_init_swizzling(dev);
 753
 754                 for_each_ring(ring, dev_priv, i)
 755                         ring->init(ring);
 756
 757                 i915_gem_context_init(dev);
 758                 if (dev_priv->mm.aliasing_ppgtt) {
 759                         ret = dev_priv->mm.aliasing_ppgtt->enable(dev);
 760                         if (ret)
 761                                 i915_gem_cleanup_aliasing_ppgtt(dev);
 762                 }
 763
 764                 /*
 765                  * It would make sense to re-init all the other hw state, at
 766                  * least the rps/rc6/emon init done within modeset_init_hw. For
 767                  * some unknown reason, this blows up my ilk, so don't.
 768                  */
 769
 770                 mutex_unlock(&dev->struct_mutex);
 771
 772                 drm_irq_uninstall(dev);
 773                 drm_irq_install(dev);
 774                 intel_hpd_init(dev);
 775         } else {
 776                 mutex_unlock(&dev->struct_mutex);
 777         }
 778
 779         return 0;
 780 }
 781
 782 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 783 {
 784         struct intel_device_info *intel_info =
 785                 (struct intel_device_info *) ent->driver_data;
 786
 787         if (IS_PRELIMINARY_HW(intel_info) && !i915_preliminary_hw_support) {
 788                 DRM_INFO("This hardware requires preliminary hardware support.\n"
 789                          "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
 790                 return -ENODEV;
 791         }
 792
 793         /* Only bind to function 0 of the device. Early generations
 794          * used function 1 as a placeholder for multi-head. This causes
 795          * us confusion instead, especially on the systems where both
 796          * functions have the same PCI-ID!
 797          */
 798         if (PCI_FUNC(pdev->devfn))
 799                 return -ENODEV;
 800
 801         /* We've managed to ship a kms-enabled ddx that shipped with an XvMC
 802          * implementation for gen3 (and only gen3) that used legacy drm maps
 803          * (gasp!) to share buffers between X and the client. Hence we need to
 804          * keep around the fake agp stuff for gen3, even when kms is enabled. */
 805         if (intel_info->gen != 3) {
 806                 driver.driver_features &=
 807                         ~(DRIVER_USE_AGP | DRIVER_REQUIRE_AGP);
 808         } else if (!intel_agp_enabled) {
 809                 DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
 810                 return -ENODEV;
 811         }
 812
 813         return drm_get_pci_dev(pdev, ent, &driver);
 814 }
 815
 816 static void
 817 i915_pci_remove(struct pci_dev *pdev)
 818 {
 819         struct drm_device *dev = pci_get_drvdata(pdev);
 820
 821         drm_put_dev(dev);
 822 }
 823
 824 static int i915_pm_suspend(struct device *dev)
 825 {
 826         struct pci_dev *pdev = to_pci_dev(dev);
 827         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 828         int error;
 829
 830         if (!drm_dev || !drm_dev->dev_private) {
 831                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 832                 return -ENODEV;
 833         }
 834
 835         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 836                 return 0;
 837
 838         error = i915_drm_freeze(drm_dev);
 839         if (error)
 840                 return error;
 841
 842         pci_disable_device(pdev);
 843         pci_set_power_state(pdev, PCI_D3hot);
 844
 845         return 0;
 846 }
 847
 848 static int i915_pm_resume(struct device *dev)
 849 {
 850         struct pci_dev *pdev = to_pci_dev(dev);
 851         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 852
 853         return i915_resume(drm_dev);
 854 }
 855
 856 static int i915_pm_freeze(struct device *dev)
 857 {
 858         struct pci_dev *pdev = to_pci_dev(dev);
 859         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 860
 861         if (!drm_dev || !drm_dev->dev_private) {
 862                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 863                 return -ENODEV;
 864         }
 865
 866         return i915_drm_freeze(drm_dev);
 867 }
 868
 869 static int i915_pm_thaw(struct device *dev)
 870 {
 871         struct pci_dev *pdev = to_pci_dev(dev);
 872         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 873
 874         return i915_drm_thaw(drm_dev);
 875 }
 876
 877 static int i915_pm_poweroff(struct device *dev)
 878 {
 879         struct pci_dev *pdev = to_pci_dev(dev);
 880         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 881
 882         return i915_drm_freeze(drm_dev);
 883 }
 884
 885 static const struct dev_pm_ops i915_pm_ops = {
 886         .suspend = i915_pm_suspend,
 887         .resume = i915_pm_resume,
 888         .freeze = i915_pm_freeze,
 889         .thaw = i915_pm_thaw,
 890         .poweroff = i915_pm_poweroff,
 891         .restore = i915_pm_resume,
 892 };
 893
 894 static const struct vm_operations_struct i915_gem_vm_ops = {
 895         .fault = i915_gem_fault,
 896         .open = drm_gem_vm_open,
 897         .close = drm_gem_vm_close,
 898 };
 899
 900 static const struct file_operations i915_driver_fops = {
 901         .owner = THIS_MODULE,
 902         .open = drm_open,
 903         .release = drm_release,
 904         .unlocked_ioctl = drm_ioctl,
 905         .mmap = drm_gem_mmap,
 906         .poll = drm_poll,
 907         .read = drm_read,
 908 #ifdef CONFIG_COMPAT
 909         .compat_ioctl = i915_compat_ioctl,
 910 #endif
 911         .llseek = noop_llseek,
 912 };
 913
 914 static struct drm_driver driver = {
 915         /* Don't use MTRRs here; the Xserver or userspace app should
 916          * deal with them for Intel hardware.
 917          */
 918         .driver_features =
 919             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP |
 920             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
 921             DRIVER_RENDER,
 922         .load = i915_driver_load,
 923         .unload = i915_driver_unload,
 924         .open = i915_driver_open,
 925         .lastclose = i915_driver_lastclose,
 926         .preclose = i915_driver_preclose,
 927         .postclose = i915_driver_postclose,
 928
 929         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
 930         .suspend = i915_suspend,
 931         .resume = i915_resume,
 932
 933         .device_is_agp = i915_driver_device_is_agp,
 934         .master_create = i915_master_create,
 935         .master_destroy = i915_master_destroy,
 936 #if defined(CONFIG_DEBUG_FS)
 937         .debugfs_init = i915_debugfs_init,
 938         .debugfs_cleanup = i915_debugfs_cleanup,
 939 #endif
 940         .gem_free_object = i915_gem_free_object,
 941         .gem_vm_ops = &i915_gem_vm_ops,
 942
 943         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 944         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 945         .gem_prime_export = i915_gem_prime_export,
 946         .gem_prime_import = i915_gem_prime_import,
 947
 948         .dumb_create = i915_gem_dumb_create,
 949         .dumb_map_offset = i915_gem_mmap_gtt,
 950         .dumb_destroy = drm_gem_dumb_destroy,
 951         .ioctls = i915_ioctls,
 952         .fops = &i915_driver_fops,
 953         .name = DRIVER_NAME,
 954         .desc = DRIVER_DESC,
 955         .date = DRIVER_DATE,
 956         .major = DRIVER_MAJOR,
 957         .minor = DRIVER_MINOR,
 958         .patchlevel = DRIVER_PATCHLEVEL,
 959 };
 960
 961 static struct pci_driver i915_pci_driver = {
 962         .name = DRIVER_NAME,
 963         .id_table = pciidlist,
 964         .probe = i915_pci_probe,
 965         .remove = i915_pci_remove,
 966         .driver.pm = &i915_pm_ops,
 967 };
 968
 969 static int __init i915_init(void)
 970 {
 971         driver.num_ioctls = i915_max_ioctl;
 972
 973         /*
 974          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
 975          * explicitly disabled with the module pararmeter.
 976          *
 977          * Otherwise, just follow the parameter (defaulting to off).
 978          *
 979          * Allow optional vga_text_mode_force boot option to override
 980          * the default behavior.
 981          */
 982 #if defined(CONFIG_DRM_I915_KMS)
 983         if (i915_modeset != 0)
 984                 driver.driver_features |= DRIVER_MODESET;
 985 #endif
 986         if (i915_modeset == 1)
 987                 driver.driver_features |= DRIVER_MODESET;
 988
 989 #ifdef CONFIG_VGA_CONSOLE
 990         if (vgacon_text_force() && i915_modeset == -1)
 991                 driver.driver_features &= ~DRIVER_MODESET;
 992 #endif
 993
 994         if (!(driver.driver_features & DRIVER_MODESET))
 995                 driver.get_vblank_timestamp = NULL;
 996
 997         return drm_pci_init(&driver, &i915_pci_driver);
 998 }
 999
1000 static void __exit i915_exit(void)
1001 {
1002         drm_pci_exit(&driver, &i915_pci_driver);
1003 }
1004
1005 module_init(i915_init);
1006 module_exit(i915_exit);
1007
1008 MODULE_AUTHOR(DRIVER_AUTHOR);
1009 MODULE_DESCRIPTION(DRIVER_DESC);
1010 MODULE_LICENSE("GPL and additional rights");