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 <linux/acpi.h>
  32 #include <drm/drmP.h>
  33 #include <drm/i915_drm.h>
  34 #include "i915_drv.h"
  35 #include "i915_trace.h"
  36 #include "intel_drv.h"
  37
  38 #include <linux/console.h>
  39 #include <linux/module.h>
  40 #include <linux/pm_runtime.h>
  41 #include <drm/drm_crtc_helper.h>
  42
  43 static struct drm_driver driver;
  44
  45 #define GEN_DEFAULT_PIPEOFFSETS \
  46         .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
  47                           PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
  48         .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
  49                            TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
  50         .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
  51
  52 #define GEN_CHV_PIPEOFFSETS \
  53         .pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
  54                           CHV_PIPE_C_OFFSET }, \
  55         .trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
  56                            CHV_TRANSCODER_C_OFFSET, }, \
  57         .palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET, \
  58                              CHV_PALETTE_C_OFFSET }
  59
  60 #define CURSOR_OFFSETS \
  61         .cursor_offsets = { CURSOR_A_OFFSET, CURSOR_B_OFFSET, CHV_CURSOR_C_OFFSET }
  62
  63 #define IVB_CURSOR_OFFSETS \
  64         .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
  65
  66 static const struct intel_device_info intel_i830_info = {
  67         .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1, .num_pipes = 2,
  68         .has_overlay = 1, .overlay_needs_physical = 1,
  69         .ring_mask = RENDER_RING,
  70         GEN_DEFAULT_PIPEOFFSETS,
  71         CURSOR_OFFSETS,
  72 };
  73
  74 static const struct intel_device_info intel_845g_info = {
  75         .gen = 2, .num_pipes = 1,
  76         .has_overlay = 1, .overlay_needs_physical = 1,
  77         .ring_mask = RENDER_RING,
  78         GEN_DEFAULT_PIPEOFFSETS,
  79         CURSOR_OFFSETS,
  80 };
  81
  82 static const struct intel_device_info intel_i85x_info = {
  83         .gen = 2, .is_i85x = 1, .is_mobile = 1, .num_pipes = 2,
  84         .cursor_needs_physical = 1,
  85         .has_overlay = 1, .overlay_needs_physical = 1,
  86         .has_fbc = 1,
  87         .ring_mask = RENDER_RING,
  88         GEN_DEFAULT_PIPEOFFSETS,
  89         CURSOR_OFFSETS,
  90 };
  91
  92 static const struct intel_device_info intel_i865g_info = {
  93         .gen = 2, .num_pipes = 1,
  94         .has_overlay = 1, .overlay_needs_physical = 1,
  95         .ring_mask = RENDER_RING,
  96         GEN_DEFAULT_PIPEOFFSETS,
  97         CURSOR_OFFSETS,
  98 };
  99
 100 static const struct intel_device_info intel_i915g_info = {
 101         .gen = 3, .is_i915g = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 102         .has_overlay = 1, .overlay_needs_physical = 1,
 103         .ring_mask = RENDER_RING,
 104         GEN_DEFAULT_PIPEOFFSETS,
 105         CURSOR_OFFSETS,
 106 };
 107 static const struct intel_device_info intel_i915gm_info = {
 108         .gen = 3, .is_mobile = 1, .num_pipes = 2,
 109         .cursor_needs_physical = 1,
 110         .has_overlay = 1, .overlay_needs_physical = 1,
 111         .supports_tv = 1,
 112         .has_fbc = 1,
 113         .ring_mask = RENDER_RING,
 114         GEN_DEFAULT_PIPEOFFSETS,
 115         CURSOR_OFFSETS,
 116 };
 117 static const struct intel_device_info intel_i945g_info = {
 118         .gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1, .num_pipes = 2,
 119         .has_overlay = 1, .overlay_needs_physical = 1,
 120         .ring_mask = RENDER_RING,
 121         GEN_DEFAULT_PIPEOFFSETS,
 122         CURSOR_OFFSETS,
 123 };
 124 static const struct intel_device_info intel_i945gm_info = {
 125         .gen = 3, .is_i945gm = 1, .is_mobile = 1, .num_pipes = 2,
 126         .has_hotplug = 1, .cursor_needs_physical = 1,
 127         .has_overlay = 1, .overlay_needs_physical = 1,
 128         .supports_tv = 1,
 129         .has_fbc = 1,
 130         .ring_mask = RENDER_RING,
 131         GEN_DEFAULT_PIPEOFFSETS,
 132         CURSOR_OFFSETS,
 133 };
 134
 135 static const struct intel_device_info intel_i965g_info = {
 136         .gen = 4, .is_broadwater = 1, .num_pipes = 2,
 137         .has_hotplug = 1,
 138         .has_overlay = 1,
 139         .ring_mask = RENDER_RING,
 140         GEN_DEFAULT_PIPEOFFSETS,
 141         CURSOR_OFFSETS,
 142 };
 143
 144 static const struct intel_device_info intel_i965gm_info = {
 145         .gen = 4, .is_crestline = 1, .num_pipes = 2,
 146         .is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
 147         .has_overlay = 1,
 148         .supports_tv = 1,
 149         .ring_mask = RENDER_RING,
 150         GEN_DEFAULT_PIPEOFFSETS,
 151         CURSOR_OFFSETS,
 152 };
 153
 154 static const struct intel_device_info intel_g33_info = {
 155         .gen = 3, .is_g33 = 1, .num_pipes = 2,
 156         .need_gfx_hws = 1, .has_hotplug = 1,
 157         .has_overlay = 1,
 158         .ring_mask = RENDER_RING,
 159         GEN_DEFAULT_PIPEOFFSETS,
 160         CURSOR_OFFSETS,
 161 };
 162
 163 static const struct intel_device_info intel_g45_info = {
 164         .gen = 4, .is_g4x = 1, .need_gfx_hws = 1, .num_pipes = 2,
 165         .has_pipe_cxsr = 1, .has_hotplug = 1,
 166         .ring_mask = RENDER_RING | BSD_RING,
 167         GEN_DEFAULT_PIPEOFFSETS,
 168         CURSOR_OFFSETS,
 169 };
 170
 171 static const struct intel_device_info intel_gm45_info = {
 172         .gen = 4, .is_g4x = 1, .num_pipes = 2,
 173         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
 174         .has_pipe_cxsr = 1, .has_hotplug = 1,
 175         .supports_tv = 1,
 176         .ring_mask = RENDER_RING | BSD_RING,
 177         GEN_DEFAULT_PIPEOFFSETS,
 178         CURSOR_OFFSETS,
 179 };
 180
 181 static const struct intel_device_info intel_pineview_info = {
 182         .gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1, .num_pipes = 2,
 183         .need_gfx_hws = 1, .has_hotplug = 1,
 184         .has_overlay = 1,
 185         GEN_DEFAULT_PIPEOFFSETS,
 186         CURSOR_OFFSETS,
 187 };
 188
 189 static const struct intel_device_info intel_ironlake_d_info = {
 190         .gen = 5, .num_pipes = 2,
 191         .need_gfx_hws = 1, .has_hotplug = 1,
 192         .ring_mask = RENDER_RING | BSD_RING,
 193         GEN_DEFAULT_PIPEOFFSETS,
 194         CURSOR_OFFSETS,
 195 };
 196
 197 static const struct intel_device_info intel_ironlake_m_info = {
 198         .gen = 5, .is_mobile = 1, .num_pipes = 2,
 199         .need_gfx_hws = 1, .has_hotplug = 1,
 200         .has_fbc = 1,
 201         .ring_mask = RENDER_RING | BSD_RING,
 202         GEN_DEFAULT_PIPEOFFSETS,
 203         CURSOR_OFFSETS,
 204 };
 205
 206 static const struct intel_device_info intel_sandybridge_d_info = {
 207         .gen = 6, .num_pipes = 2,
 208         .need_gfx_hws = 1, .has_hotplug = 1,
 209         .has_fbc = 1,
 210         .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 211         .has_llc = 1,
 212         GEN_DEFAULT_PIPEOFFSETS,
 213         CURSOR_OFFSETS,
 214 };
 215
 216 static const struct intel_device_info intel_sandybridge_m_info = {
 217         .gen = 6, .is_mobile = 1, .num_pipes = 2,
 218         .need_gfx_hws = 1, .has_hotplug = 1,
 219         .has_fbc = 1,
 220         .ring_mask = RENDER_RING | BSD_RING | BLT_RING,
 221         .has_llc = 1,
 222         GEN_DEFAULT_PIPEOFFSETS,
 223         CURSOR_OFFSETS,
 224 };
 225
 226 #define GEN7_FEATURES  \
 227         .gen = 7, .num_pipes = 3, \
 228         .need_gfx_hws = 1, .has_hotplug = 1, \
 229         .has_fbc = 1, \
 230         .ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
 231         .has_llc = 1
 232
 233 static const struct intel_device_info intel_ivybridge_d_info = {
 234         GEN7_FEATURES,
 235         .is_ivybridge = 1,
 236         GEN_DEFAULT_PIPEOFFSETS,
 237         IVB_CURSOR_OFFSETS,
 238 };
 239
 240 static const struct intel_device_info intel_ivybridge_m_info = {
 241         GEN7_FEATURES,
 242         .is_ivybridge = 1,
 243         .is_mobile = 1,
 244         GEN_DEFAULT_PIPEOFFSETS,
 245         IVB_CURSOR_OFFSETS,
 246 };
 247
 248 static const struct intel_device_info intel_ivybridge_q_info = {
 249         GEN7_FEATURES,
 250         .is_ivybridge = 1,
 251         .num_pipes = 0, /* legal, last one wins */
 252         GEN_DEFAULT_PIPEOFFSETS,
 253         IVB_CURSOR_OFFSETS,
 254 };
 255
 256 static const struct intel_device_info intel_valleyview_m_info = {
 257         GEN7_FEATURES,
 258         .is_mobile = 1,
 259         .num_pipes = 2,
 260         .is_valleyview = 1,
 261         .display_mmio_offset = VLV_DISPLAY_BASE,
 262         .has_fbc = 0, /* legal, last one wins */
 263         .has_llc = 0, /* legal, last one wins */
 264         GEN_DEFAULT_PIPEOFFSETS,
 265         CURSOR_OFFSETS,
 266 };
 267
 268 static const struct intel_device_info intel_valleyview_d_info = {
 269         GEN7_FEATURES,
 270         .num_pipes = 2,
 271         .is_valleyview = 1,
 272         .display_mmio_offset = VLV_DISPLAY_BASE,
 273         .has_fbc = 0, /* legal, last one wins */
 274         .has_llc = 0, /* legal, last one wins */
 275         GEN_DEFAULT_PIPEOFFSETS,
 276         CURSOR_OFFSETS,
 277 };
 278
 279 static const struct intel_device_info intel_haswell_d_info = {
 280         GEN7_FEATURES,
 281         .is_haswell = 1,
 282         .has_ddi = 1,
 283         .has_fpga_dbg = 1,
 284         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 285         GEN_DEFAULT_PIPEOFFSETS,
 286         IVB_CURSOR_OFFSETS,
 287 };
 288
 289 static const struct intel_device_info intel_haswell_m_info = {
 290         GEN7_FEATURES,
 291         .is_haswell = 1,
 292         .is_mobile = 1,
 293         .has_ddi = 1,
 294         .has_fpga_dbg = 1,
 295         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 296         GEN_DEFAULT_PIPEOFFSETS,
 297         IVB_CURSOR_OFFSETS,
 298 };
 299
 300 static const struct intel_device_info intel_broadwell_d_info = {
 301         .gen = 8, .num_pipes = 3,
 302         .need_gfx_hws = 1, .has_hotplug = 1,
 303         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 304         .has_llc = 1,
 305         .has_ddi = 1,
 306         .has_fpga_dbg = 1,
 307         .has_fbc = 1,
 308         GEN_DEFAULT_PIPEOFFSETS,
 309         IVB_CURSOR_OFFSETS,
 310 };
 311
 312 static const struct intel_device_info intel_broadwell_m_info = {
 313         .gen = 8, .is_mobile = 1, .num_pipes = 3,
 314         .need_gfx_hws = 1, .has_hotplug = 1,
 315         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 316         .has_llc = 1,
 317         .has_ddi = 1,
 318         .has_fpga_dbg = 1,
 319         .has_fbc = 1,
 320         GEN_DEFAULT_PIPEOFFSETS,
 321         IVB_CURSOR_OFFSETS,
 322 };
 323
 324 static const struct intel_device_info intel_broadwell_gt3d_info = {
 325         .gen = 8, .num_pipes = 3,
 326         .need_gfx_hws = 1, .has_hotplug = 1,
 327         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 328         .has_llc = 1,
 329         .has_ddi = 1,
 330         .has_fpga_dbg = 1,
 331         .has_fbc = 1,
 332         GEN_DEFAULT_PIPEOFFSETS,
 333         IVB_CURSOR_OFFSETS,
 334 };
 335
 336 static const struct intel_device_info intel_broadwell_gt3m_info = {
 337         .gen = 8, .is_mobile = 1, .num_pipes = 3,
 338         .need_gfx_hws = 1, .has_hotplug = 1,
 339         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 340         .has_llc = 1,
 341         .has_ddi = 1,
 342         .has_fpga_dbg = 1,
 343         .has_fbc = 1,
 344         GEN_DEFAULT_PIPEOFFSETS,
 345         IVB_CURSOR_OFFSETS,
 346 };
 347
 348 static const struct intel_device_info intel_cherryview_info = {
 349         .gen = 8, .num_pipes = 3,
 350         .need_gfx_hws = 1, .has_hotplug = 1,
 351         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 352         .is_valleyview = 1,
 353         .display_mmio_offset = VLV_DISPLAY_BASE,
 354         GEN_CHV_PIPEOFFSETS,
 355         CURSOR_OFFSETS,
 356 };
 357
 358 static const struct intel_device_info intel_skylake_info = {
 359         .is_preliminary = 1,
 360         .is_skylake = 1,
 361         .gen = 9, .num_pipes = 3,
 362         .need_gfx_hws = 1, .has_hotplug = 1,
 363         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 364         .has_llc = 1,
 365         .has_ddi = 1,
 366         .has_fbc = 1,
 367         GEN_DEFAULT_PIPEOFFSETS,
 368         IVB_CURSOR_OFFSETS,
 369 };
 370
 371 static const struct intel_device_info intel_skylake_gt3_info = {
 372         .is_preliminary = 1,
 373         .is_skylake = 1,
 374         .gen = 9, .num_pipes = 3,
 375         .need_gfx_hws = 1, .has_hotplug = 1,
 376         .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
 377         .has_llc = 1,
 378         .has_ddi = 1,
 379         .has_fbc = 1,
 380         GEN_DEFAULT_PIPEOFFSETS,
 381         IVB_CURSOR_OFFSETS,
 382 };
 383
 384 /*
 385  * Make sure any device matches here are from most specific to most
 386  * general.  For example, since the Quanta match is based on the subsystem
 387  * and subvendor IDs, we need it to come before the more general IVB
 388  * PCI ID matches, otherwise we'll use the wrong info struct above.
 389  */
 390 #define INTEL_PCI_IDS \
 391         INTEL_I830_IDS(&intel_i830_info),       \
 392         INTEL_I845G_IDS(&intel_845g_info),      \
 393         INTEL_I85X_IDS(&intel_i85x_info),       \
 394         INTEL_I865G_IDS(&intel_i865g_info),     \
 395         INTEL_I915G_IDS(&intel_i915g_info),     \
 396         INTEL_I915GM_IDS(&intel_i915gm_info),   \
 397         INTEL_I945G_IDS(&intel_i945g_info),     \
 398         INTEL_I945GM_IDS(&intel_i945gm_info),   \
 399         INTEL_I965G_IDS(&intel_i965g_info),     \
 400         INTEL_G33_IDS(&intel_g33_info),         \
 401         INTEL_I965GM_IDS(&intel_i965gm_info),   \
 402         INTEL_GM45_IDS(&intel_gm45_info),       \
 403         INTEL_G45_IDS(&intel_g45_info),         \
 404         INTEL_PINEVIEW_IDS(&intel_pineview_info),       \
 405         INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),   \
 406         INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),   \
 407         INTEL_SNB_D_IDS(&intel_sandybridge_d_info),     \
 408         INTEL_SNB_M_IDS(&intel_sandybridge_m_info),     \
 409         INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
 410         INTEL_IVB_M_IDS(&intel_ivybridge_m_info),       \
 411         INTEL_IVB_D_IDS(&intel_ivybridge_d_info),       \
 412         INTEL_HSW_D_IDS(&intel_haswell_d_info), \
 413         INTEL_HSW_M_IDS(&intel_haswell_m_info), \
 414         INTEL_VLV_M_IDS(&intel_valleyview_m_info),      \
 415         INTEL_VLV_D_IDS(&intel_valleyview_d_info),      \
 416         INTEL_BDW_GT12M_IDS(&intel_broadwell_m_info),   \
 417         INTEL_BDW_GT12D_IDS(&intel_broadwell_d_info),   \
 418         INTEL_BDW_GT3M_IDS(&intel_broadwell_gt3m_info), \
 419         INTEL_BDW_GT3D_IDS(&intel_broadwell_gt3d_info), \
 420         INTEL_CHV_IDS(&intel_cherryview_info),  \
 421         INTEL_SKL_GT1_IDS(&intel_skylake_info), \
 422         INTEL_SKL_GT2_IDS(&intel_skylake_info), \
 423         INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info)      \
 424
 425 static const struct pci_device_id pciidlist[] = {               /* aka */
 426         INTEL_PCI_IDS,
 427         {0, 0, 0}
 428 };
 429
 430 #if defined(CONFIG_DRM_I915_KMS)
 431 MODULE_DEVICE_TABLE(pci, pciidlist);
 432 #endif
 433
 434 void intel_detect_pch(struct drm_device *dev)
 435 {
 436         struct drm_i915_private *dev_priv = dev->dev_private;
 437         struct pci_dev *pch = NULL;
 438
 439         /* In all current cases, num_pipes is equivalent to the PCH_NOP setting
 440          * (which really amounts to a PCH but no South Display).
 441          */
 442         if (INTEL_INFO(dev)->num_pipes == 0) {
 443                 dev_priv->pch_type = PCH_NOP;
 444                 return;
 445         }
 446
 447         /*
 448          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 449          * make graphics device passthrough work easy for VMM, that only
 450          * need to expose ISA bridge to let driver know the real hardware
 451          * underneath. This is a requirement from virtualization team.
 452          *
 453          * In some virtualized environments (e.g. XEN), there is irrelevant
 454          * ISA bridge in the system. To work reliably, we should scan trhough
 455          * all the ISA bridge devices and check for the first match, instead
 456          * of only checking the first one.
 457          */
 458         while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
 459                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 460                         unsigned short id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 461                         dev_priv->pch_id = id;
 462
 463                         if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 464                                 dev_priv->pch_type = PCH_IBX;
 465                                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 466                                 WARN_ON(!IS_GEN5(dev));
 467                         } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 468                                 dev_priv->pch_type = PCH_CPT;
 469                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 470                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 471                         } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 472                                 /* PantherPoint is CPT compatible */
 473                                 dev_priv->pch_type = PCH_CPT;
 474                                 DRM_DEBUG_KMS("Found PantherPoint PCH\n");
 475                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 476                         } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 477                                 dev_priv->pch_type = PCH_LPT;
 478                                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 479                                 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
 480                                 WARN_ON(IS_HSW_ULT(dev) || IS_BDW_ULT(dev));
 481                         } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 482                                 dev_priv->pch_type = PCH_LPT;
 483                                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 484                                 WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
 485                                 WARN_ON(!IS_HSW_ULT(dev) && !IS_BDW_ULT(dev));
 486                         } else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
 487                                 dev_priv->pch_type = PCH_SPT;
 488                                 DRM_DEBUG_KMS("Found SunrisePoint PCH\n");
 489                                 WARN_ON(!IS_SKYLAKE(dev));
 490                         } else if (id == INTEL_PCH_SPT_LP_DEVICE_ID_TYPE) {
 491                                 dev_priv->pch_type = PCH_SPT;
 492                                 DRM_DEBUG_KMS("Found SunrisePoint LP PCH\n");
 493                                 WARN_ON(!IS_SKYLAKE(dev));
 494                         } else
 495                                 continue;
 496
 497                         break;
 498                 }
 499         }
 500         if (!pch)
 501                 DRM_DEBUG_KMS("No PCH found.\n");
 502
 503         pci_dev_put(pch);
 504 }
 505
 506 bool i915_semaphore_is_enabled(struct drm_device *dev)
 507 {
 508         if (INTEL_INFO(dev)->gen < 6)
 509                 return false;
 510
 511         if (i915.semaphores >= 0)
 512                 return i915.semaphores;
 513
 514         /* TODO: make semaphores and Execlists play nicely together */
 515         if (i915.enable_execlists)
 516                 return false;
 517
 518         /* Until we get further testing... */
 519         if (IS_GEN8(dev))
 520                 return false;
 521
 522 #ifdef CONFIG_INTEL_IOMMU
 523         /* Enable semaphores on SNB when IO remapping is off */
 524         if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
 525                 return false;
 526 #endif
 527
 528         return true;
 529 }
 530
 531 void intel_hpd_cancel_work(struct drm_i915_private *dev_priv)
 532 {
 533         spin_lock_irq(&dev_priv->irq_lock);
 534
 535         dev_priv->long_hpd_port_mask = 0;
 536         dev_priv->short_hpd_port_mask = 0;
 537         dev_priv->hpd_event_bits = 0;
 538
 539         spin_unlock_irq(&dev_priv->irq_lock);
 540
 541         cancel_work_sync(&dev_priv->dig_port_work);
 542         cancel_work_sync(&dev_priv->hotplug_work);
 543         cancel_delayed_work_sync(&dev_priv->hotplug_reenable_work);
 544 }
 545
 546 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
 547 {
 548         struct drm_device *dev = dev_priv->dev;
 549         struct drm_encoder *encoder;
 550
 551         drm_modeset_lock_all(dev);
 552         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 553                 struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
 554
 555                 if (intel_encoder->suspend)
 556                         intel_encoder->suspend(intel_encoder);
 557         }
 558         drm_modeset_unlock_all(dev);
 559 }
 560
 561 static int intel_suspend_complete(struct drm_i915_private *dev_priv);
 562 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
 563                               bool rpm_resume);
 564
 565 static int i915_drm_suspend(struct drm_device *dev)
 566 {
 567         struct drm_i915_private *dev_priv = dev->dev_private;
 568         struct drm_crtc *crtc;
 569         pci_power_t opregion_target_state;
 570         int error;
 571
 572         /* ignore lid events during suspend */
 573         mutex_lock(&dev_priv->modeset_restore_lock);
 574         dev_priv->modeset_restore = MODESET_SUSPENDED;
 575         mutex_unlock(&dev_priv->modeset_restore_lock);
 576
 577         /* We do a lot of poking in a lot of registers, make sure they work
 578          * properly. */
 579         intel_display_set_init_power(dev_priv, true);
 580
 581         drm_kms_helper_poll_disable(dev);
 582
 583         pci_save_state(dev->pdev);
 584
 585         error = i915_gem_suspend(dev);
 586         if (error) {
 587                 dev_err(&dev->pdev->dev,
 588                         "GEM idle failed, resume might fail\n");
 589                 return error;
 590         }
 591
 592         intel_suspend_gt_powersave(dev);
 593
 594         /*
 595          * Disable CRTCs directly since we want to preserve sw state
 596          * for _thaw. Also, power gate the CRTC power wells.
 597          */
 598         drm_modeset_lock_all(dev);
 599         for_each_crtc(dev, crtc)
 600                 intel_crtc_control(crtc, false);
 601         drm_modeset_unlock_all(dev);
 602
 603         intel_dp_mst_suspend(dev);
 604
 605         intel_runtime_pm_disable_interrupts(dev_priv);
 606         intel_hpd_cancel_work(dev_priv);
 607
 608         intel_suspend_encoders(dev_priv);
 609
 610         intel_suspend_hw(dev);
 611
 612         i915_gem_suspend_gtt_mappings(dev);
 613
 614         i915_save_state(dev);
 615
 616         opregion_target_state = PCI_D3cold;
 617 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
 618         if (acpi_target_system_state() < ACPI_STATE_S3)
 619                 opregion_target_state = PCI_D1;
 620 #endif
 621         intel_opregion_notify_adapter(dev, opregion_target_state);
 622
 623         intel_uncore_forcewake_reset(dev, false);
 624         intel_opregion_fini(dev);
 625
 626         intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED, true);
 627
 628         dev_priv->suspend_count++;
 629
 630         intel_display_set_init_power(dev_priv, false);
 631
 632         return 0;
 633 }
 634
 635 static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
 636 {
 637         struct drm_i915_private *dev_priv = drm_dev->dev_private;
 638         int ret;
 639
 640         ret = intel_suspend_complete(dev_priv);
 641
 642         if (ret) {
 643                 DRM_ERROR("Suspend complete failed: %d\n", ret);
 644
 645                 return ret;
 646         }
 647
 648         pci_disable_device(drm_dev->pdev);
 649         /*
 650          * During hibernation on some GEN4 platforms the BIOS may try to access
 651          * the device even though it's already in D3 and hang the machine. So
 652          * leave the device in D0 on those platforms and hope the BIOS will
 653          * power down the device properly. Platforms where this was seen:
 654          * Lenovo Thinkpad X301, X61s
 655          */
 656         if (!(hibernation &&
 657               drm_dev->pdev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
 658               INTEL_INFO(dev_priv)->gen == 4))
 659                 pci_set_power_state(drm_dev->pdev, PCI_D3hot);
 660
 661         return 0;
 662 }
 663
 664 int i915_suspend_legacy(struct drm_device *dev, pm_message_t state)
 665 {
 666         int error;
 667
 668         if (!dev || !dev->dev_private) {
 669                 DRM_ERROR("dev: %p\n", dev);
 670                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 671                 return -ENODEV;
 672         }
 673
 674         if (WARN_ON_ONCE(state.event != PM_EVENT_SUSPEND &&
 675                          state.event != PM_EVENT_FREEZE))
 676                 return -EINVAL;
 677
 678         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 679                 return 0;
 680
 681         error = i915_drm_suspend(dev);
 682         if (error)
 683                 return error;
 684
 685         return i915_drm_suspend_late(dev, false);
 686 }
 687
 688 static int i915_drm_resume(struct drm_device *dev)
 689 {
 690         struct drm_i915_private *dev_priv = dev->dev_private;
 691
 692         mutex_lock(&dev->struct_mutex);
 693         i915_gem_restore_gtt_mappings(dev);
 694         mutex_unlock(&dev->struct_mutex);
 695
 696         i915_restore_state(dev);
 697         intel_opregion_setup(dev);
 698
 699         intel_init_pch_refclk(dev);
 700         drm_mode_config_reset(dev);
 701
 702         /*
 703          * Interrupts have to be enabled before any batches are run. If not the
 704          * GPU will hang. i915_gem_init_hw() will initiate batches to
 705          * update/restore the context.
 706          *
 707          * Modeset enabling in intel_modeset_init_hw() also needs working
 708          * interrupts.
 709          */
 710         intel_runtime_pm_enable_interrupts(dev_priv);
 711
 712         mutex_lock(&dev->struct_mutex);
 713         if (i915_gem_init_hw(dev)) {
 714                 DRM_ERROR("failed to re-initialize GPU, declaring wedged!\n");
 715                 atomic_set_mask(I915_WEDGED, &dev_priv->gpu_error.reset_counter);
 716         }
 717         mutex_unlock(&dev->struct_mutex);
 718
 719         intel_modeset_init_hw(dev);
 720
 721         spin_lock_irq(&dev_priv->irq_lock);
 722         if (dev_priv->display.hpd_irq_setup)
 723                 dev_priv->display.hpd_irq_setup(dev);
 724         spin_unlock_irq(&dev_priv->irq_lock);
 725
 726         drm_modeset_lock_all(dev);
 727         intel_modeset_setup_hw_state(dev, true);
 728         drm_modeset_unlock_all(dev);
 729
 730         intel_dp_mst_resume(dev);
 731
 732         /*
 733          * ... but also need to make sure that hotplug processing
 734          * doesn't cause havoc. Like in the driver load code we don't
 735          * bother with the tiny race here where we might loose hotplug
 736          * notifications.
 737          * */
 738         intel_hpd_init(dev_priv);
 739         /* Config may have changed between suspend and resume */
 740         drm_helper_hpd_irq_event(dev);
 741
 742         intel_opregion_init(dev);
 743
 744         intel_fbdev_set_suspend(dev, FBINFO_STATE_RUNNING, false);
 745
 746         mutex_lock(&dev_priv->modeset_restore_lock);
 747         dev_priv->modeset_restore = MODESET_DONE;
 748         mutex_unlock(&dev_priv->modeset_restore_lock);
 749
 750         intel_opregion_notify_adapter(dev, PCI_D0);
 751
 752         drm_kms_helper_poll_enable(dev);
 753
 754         return 0;
 755 }
 756
 757 static int i915_drm_resume_early(struct drm_device *dev)
 758 {
 759         struct drm_i915_private *dev_priv = dev->dev_private;
 760         int ret = 0;
 761
 762         /*
 763          * We have a resume ordering issue with the snd-hda driver also
 764          * requiring our device to be power up. Due to the lack of a
 765          * parent/child relationship we currently solve this with an early
 766          * resume hook.
 767          *
 768          * FIXME: This should be solved with a special hdmi sink device or
 769          * similar so that power domains can be employed.
 770          */
 771         if (pci_enable_device(dev->pdev))
 772                 return -EIO;
 773
 774         pci_set_master(dev->pdev);
 775
 776         if (IS_VALLEYVIEW(dev_priv))
 777                 ret = vlv_resume_prepare(dev_priv, false);
 778         if (ret)
 779                 DRM_ERROR("Resume prepare failed: %d,Continuing resume\n", ret);
 780
 781         intel_uncore_early_sanitize(dev, true);
 782
 783         if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
 784                 hsw_disable_pc8(dev_priv);
 785
 786         intel_uncore_sanitize(dev);
 787         intel_power_domains_init_hw(dev_priv);
 788
 789         return ret;
 790 }
 791
 792 int i915_resume_legacy(struct drm_device *dev)
 793 {
 794         int ret;
 795
 796         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 797                 return 0;
 798
 799         ret = i915_drm_resume_early(dev);
 800         if (ret)
 801                 return ret;
 802
 803         return i915_drm_resume(dev);
 804 }
 805
 806 /**
 807  * i915_reset - reset chip after a hang
 808  * @dev: drm device to reset
 809  *
 810  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 811  * reset or otherwise an error code.
 812  *
 813  * Procedure is fairly simple:
 814  *   - reset the chip using the reset reg
 815  *   - re-init context state
 816  *   - re-init hardware status page
 817  *   - re-init ring buffer
 818  *   - re-init interrupt state
 819  *   - re-init display
 820  */
 821 int i915_reset(struct drm_device *dev)
 822 {
 823         struct drm_i915_private *dev_priv = dev->dev_private;
 824         bool simulated;
 825         int ret;
 826
 827         if (!i915.reset)
 828                 return 0;
 829
 830         intel_reset_gt_powersave(dev);
 831
 832         mutex_lock(&dev->struct_mutex);
 833
 834         i915_gem_reset(dev);
 835
 836         simulated = dev_priv->gpu_error.stop_rings != 0;
 837
 838         ret = intel_gpu_reset(dev);
 839
 840         /* Also reset the gpu hangman. */
 841         if (simulated) {
 842                 DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
 843                 dev_priv->gpu_error.stop_rings = 0;
 844                 if (ret == -ENODEV) {
 845                         DRM_INFO("Reset not implemented, but ignoring "
 846                                  "error for simulated gpu hangs\n");
 847                         ret = 0;
 848                 }
 849         }
 850
 851         if (i915_stop_ring_allow_warn(dev_priv))
 852                 pr_notice("drm/i915: Resetting chip after gpu hang\n");
 853
 854         if (ret) {
 855                 DRM_ERROR("Failed to reset chip: %i\n", ret);
 856                 mutex_unlock(&dev->struct_mutex);
 857                 return ret;
 858         }
 859
 860         intel_overlay_reset(dev_priv);
 861
 862         /* Ok, now get things going again... */
 863
 864         /*
 865          * Everything depends on having the GTT running, so we need to start
 866          * there.  Fortunately we don't need to do this unless we reset the
 867          * chip at a PCI level.
 868          *
 869          * Next we need to restore the context, but we don't use those
 870          * yet either...
 871          *
 872          * Ring buffer needs to be re-initialized in the KMS case, or if X
 873          * was running at the time of the reset (i.e. we weren't VT
 874          * switched away).
 875          */
 876
 877         /* Used to prevent gem_check_wedged returning -EAGAIN during gpu reset */
 878         dev_priv->gpu_error.reload_in_reset = true;
 879
 880         ret = i915_gem_init_hw(dev);
 881
 882         dev_priv->gpu_error.reload_in_reset = false;
 883
 884         mutex_unlock(&dev->struct_mutex);
 885         if (ret) {
 886                 DRM_ERROR("Failed hw init on reset %d\n", ret);
 887                 return ret;
 888         }
 889
 890         /*
 891          * rps/rc6 re-init is necessary to restore state lost after the
 892          * reset and the re-install of gt irqs. Skip for ironlake per
 893          * previous concerns that it doesn't respond well to some forms
 894          * of re-init after reset.
 895          */
 896         if (INTEL_INFO(dev)->gen > 5)
 897                 intel_enable_gt_powersave(dev);
 898
 899         return 0;
 900 }
 901
 902 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 903 {
 904         struct intel_device_info *intel_info =
 905                 (struct intel_device_info *) ent->driver_data;
 906
 907         if (IS_PRELIMINARY_HW(intel_info) && !i915.preliminary_hw_support) {
 908                 DRM_INFO("This hardware requires preliminary hardware support.\n"
 909                          "See CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT, and/or modparam preliminary_hw_support\n");
 910                 return -ENODEV;
 911         }
 912
 913         /* Only bind to function 0 of the device. Early generations
 914          * used function 1 as a placeholder for multi-head. This causes
 915          * us confusion instead, especially on the systems where both
 916          * functions have the same PCI-ID!
 917          */
 918         if (PCI_FUNC(pdev->devfn))
 919                 return -ENODEV;
 920
 921         driver.driver_features &= ~(DRIVER_USE_AGP);
 922
 923         return drm_get_pci_dev(pdev, ent, &driver);
 924 }
 925
 926 static void
 927 i915_pci_remove(struct pci_dev *pdev)
 928 {
 929         struct drm_device *dev = pci_get_drvdata(pdev);
 930
 931         drm_put_dev(dev);
 932 }
 933
 934 static int i915_pm_suspend(struct device *dev)
 935 {
 936         struct pci_dev *pdev = to_pci_dev(dev);
 937         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 938
 939         if (!drm_dev || !drm_dev->dev_private) {
 940                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 941                 return -ENODEV;
 942         }
 943
 944         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 945                 return 0;
 946
 947         return i915_drm_suspend(drm_dev);
 948 }
 949
 950 static int i915_pm_suspend_late(struct device *dev)
 951 {
 952         struct drm_device *drm_dev = dev_to_i915(dev)->dev;
 953
 954         /*
 955          * We have a suspedn ordering issue with the snd-hda driver also
 956          * requiring our device to be power up. Due to the lack of a
 957          * parent/child relationship we currently solve this with an late
 958          * suspend hook.
 959          *
 960          * FIXME: This should be solved with a special hdmi sink device or
 961          * similar so that power domains can be employed.
 962          */
 963         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 964                 return 0;
 965
 966         return i915_drm_suspend_late(drm_dev, false);
 967 }
 968
 969 static int i915_pm_poweroff_late(struct device *dev)
 970 {
 971         struct drm_device *drm_dev = dev_to_i915(dev)->dev;
 972
 973         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 974                 return 0;
 975
 976         return i915_drm_suspend_late(drm_dev, true);
 977 }
 978
 979 static int i915_pm_resume_early(struct device *dev)
 980 {
 981         struct drm_device *drm_dev = dev_to_i915(dev)->dev;
 982
 983         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 984                 return 0;
 985
 986         return i915_drm_resume_early(drm_dev);
 987 }
 988
 989 static int i915_pm_resume(struct device *dev)
 990 {
 991         struct drm_device *drm_dev = dev_to_i915(dev)->dev;
 992
 993         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 994                 return 0;
 995
 996         return i915_drm_resume(drm_dev);
 997 }
 998
 999 static int hsw_suspend_complete(struct drm_i915_private *dev_priv)
1000 {
1001         hsw_enable_pc8(dev_priv);
1002
1003         return 0;
1004 }
1005
1006 /*
1007  * Save all Gunit registers that may be lost after a D3 and a subsequent
1008  * S0i[R123] transition. The list of registers needing a save/restore is
1009  * defined in the VLV2_S0IXRegs document. This documents marks all Gunit
1010  * registers in the following way:
1011  * - Driver: saved/restored by the driver
1012  * - Punit : saved/restored by the Punit firmware
1013  * - No, w/o marking: no need to save/restore, since the register is R/O or
1014  *                    used internally by the HW in a way that doesn't depend
1015  *                    keeping the content across a suspend/resume.
1016  * - Debug : used for debugging
1017  *
1018  * We save/restore all registers marked with 'Driver', with the following
1019  * exceptions:
1020  * - Registers out of use, including also registers marked with 'Debug'.
1021  *   These have no effect on the driver's operation, so we don't save/restore
1022  *   them to reduce the overhead.
1023  * - Registers that are fully setup by an initialization function called from
1024  *   the resume path. For example many clock gating and RPS/RC6 registers.
1025  * - Registers that provide the right functionality with their reset defaults.
1026  *
1027  * TODO: Except for registers that based on the above 3 criteria can be safely
1028  * ignored, we save/restore all others, practically treating the HW context as
1029  * a black-box for the driver. Further investigation is needed to reduce the
1030  * saved/restored registers even further, by following the same 3 criteria.
1031  */
1032 static void vlv_save_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1033 {
1034         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1035         int i;
1036
1037         /* GAM 0x4000-0x4770 */
1038         s->wr_watermark         = I915_READ(GEN7_WR_WATERMARK);
1039         s->gfx_prio_ctrl        = I915_READ(GEN7_GFX_PRIO_CTRL);
1040         s->arb_mode             = I915_READ(ARB_MODE);
1041         s->gfx_pend_tlb0        = I915_READ(GEN7_GFX_PEND_TLB0);
1042         s->gfx_pend_tlb1        = I915_READ(GEN7_GFX_PEND_TLB1);
1043
1044         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1045                 s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS_BASE + i * 4);
1046
1047         s->media_max_req_count  = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
1048         s->gfx_max_req_count    = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
1049
1050         s->render_hwsp          = I915_READ(RENDER_HWS_PGA_GEN7);
1051         s->ecochk               = I915_READ(GAM_ECOCHK);
1052         s->bsd_hwsp             = I915_READ(BSD_HWS_PGA_GEN7);
1053         s->blt_hwsp             = I915_READ(BLT_HWS_PGA_GEN7);
1054
1055         s->tlb_rd_addr          = I915_READ(GEN7_TLB_RD_ADDR);
1056
1057         /* MBC 0x9024-0x91D0, 0x8500 */
1058         s->g3dctl               = I915_READ(VLV_G3DCTL);
1059         s->gsckgctl             = I915_READ(VLV_GSCKGCTL);
1060         s->mbctl                = I915_READ(GEN6_MBCTL);
1061
1062         /* GCP 0x9400-0x9424, 0x8100-0x810C */
1063         s->ucgctl1              = I915_READ(GEN6_UCGCTL1);
1064         s->ucgctl3              = I915_READ(GEN6_UCGCTL3);
1065         s->rcgctl1              = I915_READ(GEN6_RCGCTL1);
1066         s->rcgctl2              = I915_READ(GEN6_RCGCTL2);
1067         s->rstctl               = I915_READ(GEN6_RSTCTL);
1068         s->misccpctl            = I915_READ(GEN7_MISCCPCTL);
1069
1070         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1071         s->gfxpause             = I915_READ(GEN6_GFXPAUSE);
1072         s->rpdeuhwtc            = I915_READ(GEN6_RPDEUHWTC);
1073         s->rpdeuc               = I915_READ(GEN6_RPDEUC);
1074         s->ecobus               = I915_READ(ECOBUS);
1075         s->pwrdwnupctl          = I915_READ(VLV_PWRDWNUPCTL);
1076         s->rp_down_timeout      = I915_READ(GEN6_RP_DOWN_TIMEOUT);
1077         s->rp_deucsw            = I915_READ(GEN6_RPDEUCSW);
1078         s->rcubmabdtmr          = I915_READ(GEN6_RCUBMABDTMR);
1079         s->rcedata              = I915_READ(VLV_RCEDATA);
1080         s->spare2gh             = I915_READ(VLV_SPAREG2H);
1081
1082         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1083         s->gt_imr               = I915_READ(GTIMR);
1084         s->gt_ier               = I915_READ(GTIER);
1085         s->pm_imr               = I915_READ(GEN6_PMIMR);
1086         s->pm_ier               = I915_READ(GEN6_PMIER);
1087
1088         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1089                 s->gt_scratch[i] = I915_READ(GEN7_GT_SCRATCH_BASE + i * 4);
1090
1091         /* GT SA CZ domain, 0x100000-0x138124 */
1092         s->tilectl              = I915_READ(TILECTL);
1093         s->gt_fifoctl           = I915_READ(GTFIFOCTL);
1094         s->gtlc_wake_ctrl       = I915_READ(VLV_GTLC_WAKE_CTRL);
1095         s->gtlc_survive         = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1096         s->pmwgicz              = I915_READ(VLV_PMWGICZ);
1097
1098         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1099         s->gu_ctl0              = I915_READ(VLV_GU_CTL0);
1100         s->gu_ctl1              = I915_READ(VLV_GU_CTL1);
1101         s->pcbr                 = I915_READ(VLV_PCBR);
1102         s->clock_gate_dis2      = I915_READ(VLV_GUNIT_CLOCK_GATE2);
1103
1104         /*
1105          * Not saving any of:
1106          * DFT,         0x9800-0x9EC0
1107          * SARB,        0xB000-0xB1FC
1108          * GAC,         0x5208-0x524C, 0x14000-0x14C000
1109          * PCI CFG
1110          */
1111 }
1112
1113 static void vlv_restore_gunit_s0ix_state(struct drm_i915_private *dev_priv)
1114 {
1115         struct vlv_s0ix_state *s = &dev_priv->vlv_s0ix_state;
1116         u32 val;
1117         int i;
1118
1119         /* GAM 0x4000-0x4770 */
1120         I915_WRITE(GEN7_WR_WATERMARK,   s->wr_watermark);
1121         I915_WRITE(GEN7_GFX_PRIO_CTRL,  s->gfx_prio_ctrl);
1122         I915_WRITE(ARB_MODE,            s->arb_mode | (0xffff << 16));
1123         I915_WRITE(GEN7_GFX_PEND_TLB0,  s->gfx_pend_tlb0);
1124         I915_WRITE(GEN7_GFX_PEND_TLB1,  s->gfx_pend_tlb1);
1125
1126         for (i = 0; i < ARRAY_SIZE(s->lra_limits); i++)
1127                 I915_WRITE(GEN7_LRA_LIMITS_BASE + i * 4, s->lra_limits[i]);
1128
1129         I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
1130         I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
1131
1132         I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
1133         I915_WRITE(GAM_ECOCHK,          s->ecochk);
1134         I915_WRITE(BSD_HWS_PGA_GEN7,    s->bsd_hwsp);
1135         I915_WRITE(BLT_HWS_PGA_GEN7,    s->blt_hwsp);
1136
1137         I915_WRITE(GEN7_TLB_RD_ADDR,    s->tlb_rd_addr);
1138
1139         /* MBC 0x9024-0x91D0, 0x8500 */
1140         I915_WRITE(VLV_G3DCTL,          s->g3dctl);
1141         I915_WRITE(VLV_GSCKGCTL,        s->gsckgctl);
1142         I915_WRITE(GEN6_MBCTL,          s->mbctl);
1143
1144         /* GCP 0x9400-0x9424, 0x8100-0x810C */
1145         I915_WRITE(GEN6_UCGCTL1,        s->ucgctl1);
1146         I915_WRITE(GEN6_UCGCTL3,        s->ucgctl3);
1147         I915_WRITE(GEN6_RCGCTL1,        s->rcgctl1);
1148         I915_WRITE(GEN6_RCGCTL2,        s->rcgctl2);
1149         I915_WRITE(GEN6_RSTCTL,         s->rstctl);
1150         I915_WRITE(GEN7_MISCCPCTL,      s->misccpctl);
1151
1152         /* GPM 0xA000-0xAA84, 0x8000-0x80FC */
1153         I915_WRITE(GEN6_GFXPAUSE,       s->gfxpause);
1154         I915_WRITE(GEN6_RPDEUHWTC,      s->rpdeuhwtc);
1155         I915_WRITE(GEN6_RPDEUC,         s->rpdeuc);
1156         I915_WRITE(ECOBUS,              s->ecobus);
1157         I915_WRITE(VLV_PWRDWNUPCTL,     s->pwrdwnupctl);
1158         I915_WRITE(GEN6_RP_DOWN_TIMEOUT,s->rp_down_timeout);
1159         I915_WRITE(GEN6_RPDEUCSW,       s->rp_deucsw);
1160         I915_WRITE(GEN6_RCUBMABDTMR,    s->rcubmabdtmr);
1161         I915_WRITE(VLV_RCEDATA,         s->rcedata);
1162         I915_WRITE(VLV_SPAREG2H,        s->spare2gh);
1163
1164         /* Display CZ domain, 0x4400C-0x4402C, 0x4F000-0x4F11F */
1165         I915_WRITE(GTIMR,               s->gt_imr);
1166         I915_WRITE(GTIER,               s->gt_ier);
1167         I915_WRITE(GEN6_PMIMR,          s->pm_imr);
1168         I915_WRITE(GEN6_PMIER,          s->pm_ier);
1169
1170         for (i = 0; i < ARRAY_SIZE(s->gt_scratch); i++)
1171                 I915_WRITE(GEN7_GT_SCRATCH_BASE + i * 4, s->gt_scratch[i]);
1172
1173         /* GT SA CZ domain, 0x100000-0x138124 */
1174         I915_WRITE(TILECTL,                     s->tilectl);
1175         I915_WRITE(GTFIFOCTL,                   s->gt_fifoctl);
1176         /*
1177          * Preserve the GT allow wake and GFX force clock bit, they are not
1178          * be restored, as they are used to control the s0ix suspend/resume
1179          * sequence by the caller.
1180          */
1181         val = I915_READ(VLV_GTLC_WAKE_CTRL);
1182         val &= VLV_GTLC_ALLOWWAKEREQ;
1183         val |= s->gtlc_wake_ctrl & ~VLV_GTLC_ALLOWWAKEREQ;
1184         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1185
1186         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1187         val &= VLV_GFX_CLK_FORCE_ON_BIT;
1188         val |= s->gtlc_survive & ~VLV_GFX_CLK_FORCE_ON_BIT;
1189         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1190
1191         I915_WRITE(VLV_PMWGICZ,                 s->pmwgicz);
1192
1193         /* Gunit-Display CZ domain, 0x182028-0x1821CF */
1194         I915_WRITE(VLV_GU_CTL0,                 s->gu_ctl0);
1195         I915_WRITE(VLV_GU_CTL1,                 s->gu_ctl1);
1196         I915_WRITE(VLV_PCBR,                    s->pcbr);
1197         I915_WRITE(VLV_GUNIT_CLOCK_GATE2,       s->clock_gate_dis2);
1198 }
1199
1200 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool force_on)
1201 {
1202         u32 val;
1203         int err;
1204
1205 #define COND (I915_READ(VLV_GTLC_SURVIVABILITY_REG) & VLV_GFX_CLK_STATUS_BIT)
1206
1207         val = I915_READ(VLV_GTLC_SURVIVABILITY_REG);
1208         val &= ~VLV_GFX_CLK_FORCE_ON_BIT;
1209         if (force_on)
1210                 val |= VLV_GFX_CLK_FORCE_ON_BIT;
1211         I915_WRITE(VLV_GTLC_SURVIVABILITY_REG, val);
1212
1213         if (!force_on)
1214                 return 0;
1215
1216         err = wait_for(COND, 20);
1217         if (err)
1218                 DRM_ERROR("timeout waiting for GFX clock force-on (%08x)\n",
1219                           I915_READ(VLV_GTLC_SURVIVABILITY_REG));
1220
1221         return err;
1222 #undef COND
1223 }
1224
1225 static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
1226 {
1227         u32 val;
1228         int err = 0;
1229
1230         val = I915_READ(VLV_GTLC_WAKE_CTRL);
1231         val &= ~VLV_GTLC_ALLOWWAKEREQ;
1232         if (allow)
1233                 val |= VLV_GTLC_ALLOWWAKEREQ;
1234         I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
1235         POSTING_READ(VLV_GTLC_WAKE_CTRL);
1236
1237 #define COND (!!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEACK) == \
1238               allow)
1239         err = wait_for(COND, 1);
1240         if (err)
1241                 DRM_ERROR("timeout disabling GT waking\n");
1242         return err;
1243 #undef COND
1244 }
1245
1246 static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
1247                                  bool wait_for_on)
1248 {
1249         u32 mask;
1250         u32 val;
1251         int err;
1252
1253         mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
1254         val = wait_for_on ? mask : 0;
1255 #define COND ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
1256         if (COND)
1257                 return 0;
1258
1259         DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
1260                         wait_for_on ? "on" : "off",
1261                         I915_READ(VLV_GTLC_PW_STATUS));
1262
1263         /*
1264          * RC6 transitioning can be delayed up to 2 msec (see
1265          * valleyview_enable_rps), use 3 msec for safety.
1266          */
1267         err = wait_for(COND, 3);
1268         if (err)
1269                 DRM_ERROR("timeout waiting for GT wells to go %s\n",
1270                           wait_for_on ? "on" : "off");
1271
1272         return err;
1273 #undef COND
1274 }
1275
1276 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)
1277 {
1278         if (!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEERR))
1279                 return;
1280
1281         DRM_ERROR("GT register access while GT waking disabled\n");
1282         I915_WRITE(VLV_GTLC_PW_STATUS, VLV_GTLC_ALLOWWAKEERR);
1283 }
1284
1285 static int vlv_suspend_complete(struct drm_i915_private *dev_priv)
1286 {
1287         u32 mask;
1288         int err;
1289
1290         /*
1291          * Bspec defines the following GT well on flags as debug only, so
1292          * don't treat them as hard failures.
1293          */
1294         (void)vlv_wait_for_gt_wells(dev_priv, false);
1295
1296         mask = VLV_GTLC_RENDER_CTX_EXISTS | VLV_GTLC_MEDIA_CTX_EXISTS;
1297         WARN_ON((I915_READ(VLV_GTLC_WAKE_CTRL) & mask) != mask);
1298
1299         vlv_check_no_gt_access(dev_priv);
1300
1301         err = vlv_force_gfx_clock(dev_priv, true);
1302         if (err)
1303                 goto err1;
1304
1305         err = vlv_allow_gt_wake(dev_priv, false);
1306         if (err)
1307                 goto err2;
1308
1309         if (!IS_CHERRYVIEW(dev_priv->dev))
1310                 vlv_save_gunit_s0ix_state(dev_priv);
1311
1312         err = vlv_force_gfx_clock(dev_priv, false);
1313         if (err)
1314                 goto err2;
1315
1316         return 0;
1317
1318 err2:
1319         /* For safety always re-enable waking and disable gfx clock forcing */
1320         vlv_allow_gt_wake(dev_priv, true);
1321 err1:
1322         vlv_force_gfx_clock(dev_priv, false);
1323
1324         return err;
1325 }
1326
1327 static int vlv_resume_prepare(struct drm_i915_private *dev_priv,
1328                                 bool rpm_resume)
1329 {
1330         struct drm_device *dev = dev_priv->dev;
1331         int err;
1332         int ret;
1333
1334         /*
1335          * If any of the steps fail just try to continue, that's the best we
1336          * can do at this point. Return the first error code (which will also
1337          * leave RPM permanently disabled).
1338          */
1339         ret = vlv_force_gfx_clock(dev_priv, true);
1340
1341         if (!IS_CHERRYVIEW(dev_priv->dev))
1342                 vlv_restore_gunit_s0ix_state(dev_priv);
1343
1344         err = vlv_allow_gt_wake(dev_priv, true);
1345         if (!ret)
1346                 ret = err;
1347
1348         err = vlv_force_gfx_clock(dev_priv, false);
1349         if (!ret)
1350                 ret = err;
1351
1352         vlv_check_no_gt_access(dev_priv);
1353
1354         if (rpm_resume) {
1355                 intel_init_clock_gating(dev);
1356                 i915_gem_restore_fences(dev);
1357         }
1358
1359         return ret;
1360 }
1361
1362 static int intel_runtime_suspend(struct device *device)
1363 {
1364         struct pci_dev *pdev = to_pci_dev(device);
1365         struct drm_device *dev = pci_get_drvdata(pdev);
1366         struct drm_i915_private *dev_priv = dev->dev_private;
1367         int ret;
1368
1369         if (WARN_ON_ONCE(!(dev_priv->rps.enabled && intel_enable_rc6(dev))))
1370                 return -ENODEV;
1371
1372         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1373                 return -ENODEV;
1374
1375         DRM_DEBUG_KMS("Suspending device\n");
1376
1377         /*
1378          * We could deadlock here in case another thread holding struct_mutex
1379          * calls RPM suspend concurrently, since the RPM suspend will wait
1380          * first for this RPM suspend to finish. In this case the concurrent
1381          * RPM resume will be followed by its RPM suspend counterpart. Still
1382          * for consistency return -EAGAIN, which will reschedule this suspend.
1383          */
1384         if (!mutex_trylock(&dev->struct_mutex)) {
1385                 DRM_DEBUG_KMS("device lock contention, deffering suspend\n");
1386                 /*
1387                  * Bump the expiration timestamp, otherwise the suspend won't
1388                  * be rescheduled.
1389                  */
1390                 pm_runtime_mark_last_busy(device);
1391
1392                 return -EAGAIN;
1393         }
1394         /*
1395          * We are safe here against re-faults, since the fault handler takes
1396          * an RPM reference.
1397          */
1398         i915_gem_release_all_mmaps(dev_priv);
1399         mutex_unlock(&dev->struct_mutex);
1400
1401         intel_suspend_gt_powersave(dev);
1402         intel_runtime_pm_disable_interrupts(dev_priv);
1403
1404         ret = intel_suspend_complete(dev_priv);
1405         if (ret) {
1406                 DRM_ERROR("Runtime suspend failed, disabling it (%d)\n", ret);
1407                 intel_runtime_pm_enable_interrupts(dev_priv);
1408
1409                 return ret;
1410         }
1411
1412         cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
1413         intel_uncore_forcewake_reset(dev, false);
1414         dev_priv->pm.suspended = true;
1415
1416         /*
1417          * FIXME: We really should find a document that references the arguments
1418          * used below!
1419          */
1420         if (IS_HASWELL(dev)) {
1421                 /*
1422                  * current versions of firmware which depend on this opregion
1423                  * notification have repurposed the D1 definition to mean
1424                  * "runtime suspended" vs. what you would normally expect (D3)
1425                  * to distinguish it from notifications that might be sent via
1426                  * the suspend path.
1427                  */
1428                 intel_opregion_notify_adapter(dev, PCI_D1);
1429         } else {
1430                 /*
1431                  * On Broadwell, if we use PCI_D1 the PCH DDI ports will stop
1432                  * being detected, and the call we do at intel_runtime_resume()
1433                  * won't be able to restore them. Since PCI_D3hot matches the
1434                  * actual specification and appears to be working, use it. Let's
1435                  * assume the other non-Haswell platforms will stay the same as
1436                  * Broadwell.
1437                  */
1438                 intel_opregion_notify_adapter(dev, PCI_D3hot);
1439         }
1440
1441         assert_forcewakes_inactive(dev_priv);
1442
1443         DRM_DEBUG_KMS("Device suspended\n");
1444         return 0;
1445 }
1446
1447 static int intel_runtime_resume(struct device *device)
1448 {
1449         struct pci_dev *pdev = to_pci_dev(device);
1450         struct drm_device *dev = pci_get_drvdata(pdev);
1451         struct drm_i915_private *dev_priv = dev->dev_private;
1452         int ret = 0;
1453
1454         if (WARN_ON_ONCE(!HAS_RUNTIME_PM(dev)))
1455                 return -ENODEV;
1456
1457         DRM_DEBUG_KMS("Resuming device\n");
1458
1459         intel_opregion_notify_adapter(dev, PCI_D0);
1460         dev_priv->pm.suspended = false;
1461
1462         if (IS_GEN6(dev_priv))
1463                 intel_init_pch_refclk(dev);
1464         else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
1465                 hsw_disable_pc8(dev_priv);
1466         else if (IS_VALLEYVIEW(dev_priv))
1467                 ret = vlv_resume_prepare(dev_priv, true);
1468
1469         /*
1470          * No point of rolling back things in case of an error, as the best
1471          * we can do is to hope that things will still work (and disable RPM).
1472          */
1473         i915_gem_init_swizzling(dev);
1474         gen6_update_ring_freq(dev);
1475
1476         intel_runtime_pm_enable_interrupts(dev_priv);
1477         intel_enable_gt_powersave(dev);
1478
1479         if (ret)
1480                 DRM_ERROR("Runtime resume failed, disabling it (%d)\n", ret);
1481         else
1482                 DRM_DEBUG_KMS("Device resumed\n");
1483
1484         return ret;
1485 }
1486
1487 /*
1488  * This function implements common functionality of runtime and system
1489  * suspend sequence.
1490  */
1491 static int intel_suspend_complete(struct drm_i915_private *dev_priv)
1492 {
1493         struct drm_device *dev = dev_priv->dev;
1494         int ret;
1495
1496         if (IS_HASWELL(dev) || IS_BROADWELL(dev))
1497                 ret = hsw_suspend_complete(dev_priv);
1498         else if (IS_VALLEYVIEW(dev))
1499                 ret = vlv_suspend_complete(dev_priv);
1500         else
1501                 ret = 0;
1502
1503         return ret;
1504 }
1505
1506 static const struct dev_pm_ops i915_pm_ops = {
1507         /*
1508          * S0ix (via system suspend) and S3 event handlers [PMSG_SUSPEND,
1509          * PMSG_RESUME]
1510          */
1511         .suspend = i915_pm_suspend,
1512         .suspend_late = i915_pm_suspend_late,
1513         .resume_early = i915_pm_resume_early,
1514         .resume = i915_pm_resume,
1515
1516         /*
1517          * S4 event handlers
1518          * @freeze, @freeze_late    : called (1) before creating the
1519          *                            hibernation image [PMSG_FREEZE] and
1520          *                            (2) after rebooting, before restoring
1521          *                            the image [PMSG_QUIESCE]
1522          * @thaw, @thaw_early       : called (1) after creating the hibernation
1523          *                            image, before writing it [PMSG_THAW]
1524          *                            and (2) after failing to create or
1525          *                            restore the image [PMSG_RECOVER]
1526          * @poweroff, @poweroff_late: called after writing the hibernation
1527          *                            image, before rebooting [PMSG_HIBERNATE]
1528          * @restore, @restore_early : called after rebooting and restoring the
1529          *                            hibernation image [PMSG_RESTORE]
1530          */
1531         .freeze = i915_pm_suspend,
1532         .freeze_late = i915_pm_suspend_late,
1533         .thaw_early = i915_pm_resume_early,
1534         .thaw = i915_pm_resume,
1535         .poweroff = i915_pm_suspend,
1536         .poweroff_late = i915_pm_poweroff_late,
1537         .restore_early = i915_pm_resume_early,
1538         .restore = i915_pm_resume,
1539
1540         /* S0ix (via runtime suspend) event handlers */
1541         .runtime_suspend = intel_runtime_suspend,
1542         .runtime_resume = intel_runtime_resume,
1543 };
1544
1545 static const struct vm_operations_struct i915_gem_vm_ops = {
1546         .fault = i915_gem_fault,
1547         .open = drm_gem_vm_open,
1548         .close = drm_gem_vm_close,
1549 };
1550
1551 static const struct file_operations i915_driver_fops = {
1552         .owner = THIS_MODULE,
1553         .open = drm_open,
1554         .release = drm_release,
1555         .unlocked_ioctl = drm_ioctl,
1556         .mmap = drm_gem_mmap,
1557         .poll = drm_poll,
1558         .read = drm_read,
1559 #ifdef CONFIG_COMPAT
1560         .compat_ioctl = i915_compat_ioctl,
1561 #endif
1562         .llseek = noop_llseek,
1563 };
1564
1565 static struct drm_driver driver = {
1566         /* Don't use MTRRs here; the Xserver or userspace app should
1567          * deal with them for Intel hardware.
1568          */
1569         .driver_features =
1570             DRIVER_USE_AGP |
1571             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
1572             DRIVER_RENDER,
1573         .load = i915_driver_load,
1574         .unload = i915_driver_unload,
1575         .open = i915_driver_open,
1576         .lastclose = i915_driver_lastclose,
1577         .preclose = i915_driver_preclose,
1578         .postclose = i915_driver_postclose,
1579         .set_busid = drm_pci_set_busid,
1580
1581         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
1582         .suspend = i915_suspend_legacy,
1583         .resume = i915_resume_legacy,
1584
1585         .device_is_agp = i915_driver_device_is_agp,
1586 #if defined(CONFIG_DEBUG_FS)
1587         .debugfs_init = i915_debugfs_init,
1588         .debugfs_cleanup = i915_debugfs_cleanup,
1589 #endif
1590         .gem_free_object = i915_gem_free_object,
1591         .gem_vm_ops = &i915_gem_vm_ops,
1592
1593         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1594         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1595         .gem_prime_export = i915_gem_prime_export,
1596         .gem_prime_import = i915_gem_prime_import,
1597
1598         .dumb_create = i915_gem_dumb_create,
1599         .dumb_map_offset = i915_gem_mmap_gtt,
1600         .dumb_destroy = drm_gem_dumb_destroy,
1601         .ioctls = i915_ioctls,
1602         .fops = &i915_driver_fops,
1603         .name = DRIVER_NAME,
1604         .desc = DRIVER_DESC,
1605         .date = DRIVER_DATE,
1606         .major = DRIVER_MAJOR,
1607         .minor = DRIVER_MINOR,
1608         .patchlevel = DRIVER_PATCHLEVEL,
1609 };
1610
1611 static struct pci_driver i915_pci_driver = {
1612         .name = DRIVER_NAME,
1613         .id_table = pciidlist,
1614         .probe = i915_pci_probe,
1615         .remove = i915_pci_remove,
1616         .driver.pm = &i915_pm_ops,
1617 };
1618
1619 static int __init i915_init(void)
1620 {
1621         driver.num_ioctls = i915_max_ioctl;
1622
1623         /*
1624          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
1625          * explicitly disabled with the module pararmeter.
1626          *
1627          * Otherwise, just follow the parameter (defaulting to off).
1628          *
1629          * Allow optional vga_text_mode_force boot option to override
1630          * the default behavior.
1631          */
1632 #if defined(CONFIG_DRM_I915_KMS)
1633         if (i915.modeset != 0)
1634                 driver.driver_features |= DRIVER_MODESET;
1635 #endif
1636         if (i915.modeset == 1)
1637                 driver.driver_features |= DRIVER_MODESET;
1638
1639 #ifdef CONFIG_VGA_CONSOLE
1640         if (vgacon_text_force() && i915.modeset == -1)
1641                 driver.driver_features &= ~DRIVER_MODESET;
1642 #endif
1643
1644         if (!(driver.driver_features & DRIVER_MODESET)) {
1645                 driver.get_vblank_timestamp = NULL;
1646                 /* Silently fail loading to not upset userspace. */
1647                 DRM_DEBUG_DRIVER("KMS and UMS disabled.\n");
1648                 return 0;
1649         }
1650
1651         /*
1652          * FIXME: Note that we're lying to the DRM core here so that we can get access
1653          * to the atomic ioctl and the atomic properties.  Only plane operations on
1654          * a single CRTC will actually work.
1655          */
1656         if (i915.nuclear_pageflip)
1657                 driver.driver_features |= DRIVER_ATOMIC;
1658
1659         return drm_pci_init(&driver, &i915_pci_driver);
1660 }
1661
1662 static void __exit i915_exit(void)
1663 {
1664         if (!(driver.driver_features & DRIVER_MODESET))
1665                 return; /* Never loaded a driver. */
1666
1667         drm_pci_exit(&driver, &i915_pci_driver);
1668 }
1669
1670 module_init(i915_init);
1671 module_exit(i915_exit);
1672
1673 MODULE_AUTHOR("Tungsten Graphics, Inc.");
1674 MODULE_AUTHOR("Intel Corporation");
1675
1676 MODULE_DESCRIPTION(DRIVER_DESC);
1677 MODULE_LICENSE("GPL and additional rights");