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 unsigned int i915_preliminary_hw_support __read_mostly = 0;
 122 module_param_named(preliminary_hw_support, i915_preliminary_hw_support, int, 0600);
 123 MODULE_PARM_DESC(preliminary_hw_support,
 124                 "Enable preliminary hardware support. (default: false)");
 125
 126 static struct drm_driver driver;
 127 extern int intel_agp_enabled;
 128
 129 #define INTEL_VGA_DEVICE(id, info) {            \
 130         .class = PCI_BASE_CLASS_DISPLAY << 16,  \
 131         .class_mask = 0xff0000,                 \
 132         .vendor = 0x8086,                       \
 133         .device = id,                           \
 134         .subvendor = PCI_ANY_ID,                \
 135         .subdevice = PCI_ANY_ID,                \
 136         .driver_data = (unsigned long) info }
 137
 138 static const struct intel_device_info intel_i830_info = {
 139         .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1,
 140         .has_overlay = 1, .overlay_needs_physical = 1,
 141 };
 142
 143 static const struct intel_device_info intel_845g_info = {
 144         .gen = 2,
 145         .has_overlay = 1, .overlay_needs_physical = 1,
 146 };
 147
 148 static const struct intel_device_info intel_i85x_info = {
 149         .gen = 2, .is_i85x = 1, .is_mobile = 1,
 150         .cursor_needs_physical = 1,
 151         .has_overlay = 1, .overlay_needs_physical = 1,
 152 };
 153
 154 static const struct intel_device_info intel_i865g_info = {
 155         .gen = 2,
 156         .has_overlay = 1, .overlay_needs_physical = 1,
 157 };
 158
 159 static const struct intel_device_info intel_i915g_info = {
 160         .gen = 3, .is_i915g = 1, .cursor_needs_physical = 1,
 161         .has_overlay = 1, .overlay_needs_physical = 1,
 162 };
 163 static const struct intel_device_info intel_i915gm_info = {
 164         .gen = 3, .is_mobile = 1,
 165         .cursor_needs_physical = 1,
 166         .has_overlay = 1, .overlay_needs_physical = 1,
 167         .supports_tv = 1,
 168 };
 169 static const struct intel_device_info intel_i945g_info = {
 170         .gen = 3, .has_hotplug = 1, .cursor_needs_physical = 1,
 171         .has_overlay = 1, .overlay_needs_physical = 1,
 172 };
 173 static const struct intel_device_info intel_i945gm_info = {
 174         .gen = 3, .is_i945gm = 1, .is_mobile = 1,
 175         .has_hotplug = 1, .cursor_needs_physical = 1,
 176         .has_overlay = 1, .overlay_needs_physical = 1,
 177         .supports_tv = 1,
 178 };
 179
 180 static const struct intel_device_info intel_i965g_info = {
 181         .gen = 4, .is_broadwater = 1,
 182         .has_hotplug = 1,
 183         .has_overlay = 1,
 184 };
 185
 186 static const struct intel_device_info intel_i965gm_info = {
 187         .gen = 4, .is_crestline = 1,
 188         .is_mobile = 1, .has_fbc = 1, .has_hotplug = 1,
 189         .has_overlay = 1,
 190         .supports_tv = 1,
 191 };
 192
 193 static const struct intel_device_info intel_g33_info = {
 194         .gen = 3, .is_g33 = 1,
 195         .need_gfx_hws = 1, .has_hotplug = 1,
 196         .has_overlay = 1,
 197 };
 198
 199 static const struct intel_device_info intel_g45_info = {
 200         .gen = 4, .is_g4x = 1, .need_gfx_hws = 1,
 201         .has_pipe_cxsr = 1, .has_hotplug = 1,
 202         .has_bsd_ring = 1,
 203 };
 204
 205 static const struct intel_device_info intel_gm45_info = {
 206         .gen = 4, .is_g4x = 1,
 207         .is_mobile = 1, .need_gfx_hws = 1, .has_fbc = 1,
 208         .has_pipe_cxsr = 1, .has_hotplug = 1,
 209         .supports_tv = 1,
 210         .has_bsd_ring = 1,
 211 };
 212
 213 static const struct intel_device_info intel_pineview_info = {
 214         .gen = 3, .is_g33 = 1, .is_pineview = 1, .is_mobile = 1,
 215         .need_gfx_hws = 1, .has_hotplug = 1,
 216         .has_overlay = 1,
 217 };
 218
 219 static const struct intel_device_info intel_ironlake_d_info = {
 220         .gen = 5,
 221         .need_gfx_hws = 1, .has_hotplug = 1,
 222         .has_bsd_ring = 1,
 223 };
 224
 225 static const struct intel_device_info intel_ironlake_m_info = {
 226         .gen = 5, .is_mobile = 1,
 227         .need_gfx_hws = 1, .has_hotplug = 1,
 228         .has_fbc = 1,
 229         .has_bsd_ring = 1,
 230 };
 231
 232 static const struct intel_device_info intel_sandybridge_d_info = {
 233         .gen = 6,
 234         .need_gfx_hws = 1, .has_hotplug = 1,
 235         .has_bsd_ring = 1,
 236         .has_blt_ring = 1,
 237         .has_llc = 1,
 238         .has_force_wake = 1,
 239 };
 240
 241 static const struct intel_device_info intel_sandybridge_m_info = {
 242         .gen = 6, .is_mobile = 1,
 243         .need_gfx_hws = 1, .has_hotplug = 1,
 244         .has_fbc = 1,
 245         .has_bsd_ring = 1,
 246         .has_blt_ring = 1,
 247         .has_llc = 1,
 248         .has_force_wake = 1,
 249 };
 250
 251 static const struct intel_device_info intel_ivybridge_d_info = {
 252         .is_ivybridge = 1, .gen = 7,
 253         .need_gfx_hws = 1, .has_hotplug = 1,
 254         .has_bsd_ring = 1,
 255         .has_blt_ring = 1,
 256         .has_llc = 1,
 257         .has_force_wake = 1,
 258 };
 259
 260 static const struct intel_device_info intel_ivybridge_m_info = {
 261         .is_ivybridge = 1, .gen = 7, .is_mobile = 1,
 262         .need_gfx_hws = 1, .has_hotplug = 1,
 263         .has_fbc = 0,   /* FBC is not enabled on Ivybridge mobile yet */
 264         .has_bsd_ring = 1,
 265         .has_blt_ring = 1,
 266         .has_llc = 1,
 267         .has_force_wake = 1,
 268 };
 269
 270 static const struct intel_device_info intel_valleyview_m_info = {
 271         .gen = 7, .is_mobile = 1,
 272         .need_gfx_hws = 1, .has_hotplug = 1,
 273         .has_fbc = 0,
 274         .has_bsd_ring = 1,
 275         .has_blt_ring = 1,
 276         .is_valleyview = 1,
 277         .display_mmio_offset = VLV_DISPLAY_BASE,
 278         .has_force_wake = 1,
 279 };
 280
 281 static const struct intel_device_info intel_valleyview_d_info = {
 282         .gen = 7,
 283         .need_gfx_hws = 1, .has_hotplug = 1,
 284         .has_fbc = 0,
 285         .has_bsd_ring = 1,
 286         .has_blt_ring = 1,
 287         .is_valleyview = 1,
 288         .display_mmio_offset = VLV_DISPLAY_BASE,
 289         .has_force_wake = 1,
 290 };
 291
 292 static const struct intel_device_info intel_haswell_d_info = {
 293         .is_haswell = 1, .gen = 7,
 294         .need_gfx_hws = 1, .has_hotplug = 1,
 295         .has_bsd_ring = 1,
 296         .has_blt_ring = 1,
 297         .has_llc = 1,
 298         .has_force_wake = 1,
 299 };
 300
 301 static const struct intel_device_info intel_haswell_m_info = {
 302         .is_haswell = 1, .gen = 7, .is_mobile = 1,
 303         .need_gfx_hws = 1, .has_hotplug = 1,
 304         .has_bsd_ring = 1,
 305         .has_blt_ring = 1,
 306         .has_llc = 1,
 307         .has_force_wake = 1,
 308 };
 309
 310 static const struct pci_device_id pciidlist[] = {               /* aka */
 311         INTEL_VGA_DEVICE(0x3577, &intel_i830_info),             /* I830_M */
 312         INTEL_VGA_DEVICE(0x2562, &intel_845g_info),             /* 845_G */
 313         INTEL_VGA_DEVICE(0x3582, &intel_i85x_info),             /* I855_GM */
 314         INTEL_VGA_DEVICE(0x358e, &intel_i85x_info),
 315         INTEL_VGA_DEVICE(0x2572, &intel_i865g_info),            /* I865_G */
 316         INTEL_VGA_DEVICE(0x2582, &intel_i915g_info),            /* I915_G */
 317         INTEL_VGA_DEVICE(0x258a, &intel_i915g_info),            /* E7221_G */
 318         INTEL_VGA_DEVICE(0x2592, &intel_i915gm_info),           /* I915_GM */
 319         INTEL_VGA_DEVICE(0x2772, &intel_i945g_info),            /* I945_G */
 320         INTEL_VGA_DEVICE(0x27a2, &intel_i945gm_info),           /* I945_GM */
 321         INTEL_VGA_DEVICE(0x27ae, &intel_i945gm_info),           /* I945_GME */
 322         INTEL_VGA_DEVICE(0x2972, &intel_i965g_info),            /* I946_GZ */
 323         INTEL_VGA_DEVICE(0x2982, &intel_i965g_info),            /* G35_G */
 324         INTEL_VGA_DEVICE(0x2992, &intel_i965g_info),            /* I965_Q */
 325         INTEL_VGA_DEVICE(0x29a2, &intel_i965g_info),            /* I965_G */
 326         INTEL_VGA_DEVICE(0x29b2, &intel_g33_info),              /* Q35_G */
 327         INTEL_VGA_DEVICE(0x29c2, &intel_g33_info),              /* G33_G */
 328         INTEL_VGA_DEVICE(0x29d2, &intel_g33_info),              /* Q33_G */
 329         INTEL_VGA_DEVICE(0x2a02, &intel_i965gm_info),           /* I965_GM */
 330         INTEL_VGA_DEVICE(0x2a12, &intel_i965gm_info),           /* I965_GME */
 331         INTEL_VGA_DEVICE(0x2a42, &intel_gm45_info),             /* GM45_G */
 332         INTEL_VGA_DEVICE(0x2e02, &intel_g45_info),              /* IGD_E_G */
 333         INTEL_VGA_DEVICE(0x2e12, &intel_g45_info),              /* Q45_G */
 334         INTEL_VGA_DEVICE(0x2e22, &intel_g45_info),              /* G45_G */
 335         INTEL_VGA_DEVICE(0x2e32, &intel_g45_info),              /* G41_G */
 336         INTEL_VGA_DEVICE(0x2e42, &intel_g45_info),              /* B43_G */
 337         INTEL_VGA_DEVICE(0x2e92, &intel_g45_info),              /* B43_G.1 */
 338         INTEL_VGA_DEVICE(0xa001, &intel_pineview_info),
 339         INTEL_VGA_DEVICE(0xa011, &intel_pineview_info),
 340         INTEL_VGA_DEVICE(0x0042, &intel_ironlake_d_info),
 341         INTEL_VGA_DEVICE(0x0046, &intel_ironlake_m_info),
 342         INTEL_VGA_DEVICE(0x0102, &intel_sandybridge_d_info),
 343         INTEL_VGA_DEVICE(0x0112, &intel_sandybridge_d_info),
 344         INTEL_VGA_DEVICE(0x0122, &intel_sandybridge_d_info),
 345         INTEL_VGA_DEVICE(0x0106, &intel_sandybridge_m_info),
 346         INTEL_VGA_DEVICE(0x0116, &intel_sandybridge_m_info),
 347         INTEL_VGA_DEVICE(0x0126, &intel_sandybridge_m_info),
 348         INTEL_VGA_DEVICE(0x010A, &intel_sandybridge_d_info),
 349         INTEL_VGA_DEVICE(0x0156, &intel_ivybridge_m_info), /* GT1 mobile */
 350         INTEL_VGA_DEVICE(0x0166, &intel_ivybridge_m_info), /* GT2 mobile */
 351         INTEL_VGA_DEVICE(0x0152, &intel_ivybridge_d_info), /* GT1 desktop */
 352         INTEL_VGA_DEVICE(0x0162, &intel_ivybridge_d_info), /* GT2 desktop */
 353         INTEL_VGA_DEVICE(0x015a, &intel_ivybridge_d_info), /* GT1 server */
 354         INTEL_VGA_DEVICE(0x016a, &intel_ivybridge_d_info), /* GT2 server */
 355         INTEL_VGA_DEVICE(0x0402, &intel_haswell_d_info), /* GT1 desktop */
 356         INTEL_VGA_DEVICE(0x0412, &intel_haswell_d_info), /* GT2 desktop */
 357         INTEL_VGA_DEVICE(0x0422, &intel_haswell_d_info), /* GT2 desktop */
 358         INTEL_VGA_DEVICE(0x040a, &intel_haswell_d_info), /* GT1 server */
 359         INTEL_VGA_DEVICE(0x041a, &intel_haswell_d_info), /* GT2 server */
 360         INTEL_VGA_DEVICE(0x042a, &intel_haswell_d_info), /* GT2 server */
 361         INTEL_VGA_DEVICE(0x0406, &intel_haswell_m_info), /* GT1 mobile */
 362         INTEL_VGA_DEVICE(0x0416, &intel_haswell_m_info), /* GT2 mobile */
 363         INTEL_VGA_DEVICE(0x0426, &intel_haswell_m_info), /* GT2 mobile */
 364         INTEL_VGA_DEVICE(0x0C02, &intel_haswell_d_info), /* SDV GT1 desktop */
 365         INTEL_VGA_DEVICE(0x0C12, &intel_haswell_d_info), /* SDV GT2 desktop */
 366         INTEL_VGA_DEVICE(0x0C22, &intel_haswell_d_info), /* SDV GT2 desktop */
 367         INTEL_VGA_DEVICE(0x0C0A, &intel_haswell_d_info), /* SDV GT1 server */
 368         INTEL_VGA_DEVICE(0x0C1A, &intel_haswell_d_info), /* SDV GT2 server */
 369         INTEL_VGA_DEVICE(0x0C2A, &intel_haswell_d_info), /* SDV GT2 server */
 370         INTEL_VGA_DEVICE(0x0C06, &intel_haswell_m_info), /* SDV GT1 mobile */
 371         INTEL_VGA_DEVICE(0x0C16, &intel_haswell_m_info), /* SDV GT2 mobile */
 372         INTEL_VGA_DEVICE(0x0C26, &intel_haswell_m_info), /* SDV GT2 mobile */
 373         INTEL_VGA_DEVICE(0x0A02, &intel_haswell_d_info), /* ULT GT1 desktop */
 374         INTEL_VGA_DEVICE(0x0A12, &intel_haswell_d_info), /* ULT GT2 desktop */
 375         INTEL_VGA_DEVICE(0x0A22, &intel_haswell_d_info), /* ULT GT2 desktop */
 376         INTEL_VGA_DEVICE(0x0A0A, &intel_haswell_d_info), /* ULT GT1 server */
 377         INTEL_VGA_DEVICE(0x0A1A, &intel_haswell_d_info), /* ULT GT2 server */
 378         INTEL_VGA_DEVICE(0x0A2A, &intel_haswell_d_info), /* ULT GT2 server */
 379         INTEL_VGA_DEVICE(0x0A06, &intel_haswell_m_info), /* ULT GT1 mobile */
 380         INTEL_VGA_DEVICE(0x0A16, &intel_haswell_m_info), /* ULT GT2 mobile */
 381         INTEL_VGA_DEVICE(0x0A26, &intel_haswell_m_info), /* ULT GT2 mobile */
 382         INTEL_VGA_DEVICE(0x0D02, &intel_haswell_d_info), /* CRW GT1 desktop */
 383         INTEL_VGA_DEVICE(0x0D12, &intel_haswell_d_info), /* CRW GT2 desktop */
 384         INTEL_VGA_DEVICE(0x0D22, &intel_haswell_d_info), /* CRW GT2 desktop */
 385         INTEL_VGA_DEVICE(0x0D0A, &intel_haswell_d_info), /* CRW GT1 server */
 386         INTEL_VGA_DEVICE(0x0D1A, &intel_haswell_d_info), /* CRW GT2 server */
 387         INTEL_VGA_DEVICE(0x0D2A, &intel_haswell_d_info), /* CRW GT2 server */
 388         INTEL_VGA_DEVICE(0x0D06, &intel_haswell_m_info), /* CRW GT1 mobile */
 389         INTEL_VGA_DEVICE(0x0D16, &intel_haswell_m_info), /* CRW GT2 mobile */
 390         INTEL_VGA_DEVICE(0x0D26, &intel_haswell_m_info), /* CRW GT2 mobile */
 391         INTEL_VGA_DEVICE(0x0f30, &intel_valleyview_m_info),
 392         INTEL_VGA_DEVICE(0x0157, &intel_valleyview_m_info),
 393         INTEL_VGA_DEVICE(0x0155, &intel_valleyview_d_info),
 394         {0, 0, 0}
 395 };
 396
 397 #if defined(CONFIG_DRM_I915_KMS)
 398 MODULE_DEVICE_TABLE(pci, pciidlist);
 399 #endif
 400
 401 void intel_detect_pch(struct drm_device *dev)
 402 {
 403         struct drm_i915_private *dev_priv = dev->dev_private;
 404         struct pci_dev *pch;
 405
 406         /*
 407          * The reason to probe ISA bridge instead of Dev31:Fun0 is to
 408          * make graphics device passthrough work easy for VMM, that only
 409          * need to expose ISA bridge to let driver know the real hardware
 410          * underneath. This is a requirement from virtualization team.
 411          */
 412         pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
 413         if (pch) {
 414                 if (pch->vendor == PCI_VENDOR_ID_INTEL) {
 415                         unsigned short id;
 416                         id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
 417                         dev_priv->pch_id = id;
 418
 419                         if (id == INTEL_PCH_IBX_DEVICE_ID_TYPE) {
 420                                 dev_priv->pch_type = PCH_IBX;
 421                                 dev_priv->num_pch_pll = 2;
 422                                 DRM_DEBUG_KMS("Found Ibex Peak PCH\n");
 423                                 WARN_ON(!IS_GEN5(dev));
 424                         } else if (id == INTEL_PCH_CPT_DEVICE_ID_TYPE) {
 425                                 dev_priv->pch_type = PCH_CPT;
 426                                 dev_priv->num_pch_pll = 2;
 427                                 DRM_DEBUG_KMS("Found CougarPoint PCH\n");
 428                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 429                         } else if (id == INTEL_PCH_PPT_DEVICE_ID_TYPE) {
 430                                 /* PantherPoint is CPT compatible */
 431                                 dev_priv->pch_type = PCH_CPT;
 432                                 dev_priv->num_pch_pll = 2;
 433                                 DRM_DEBUG_KMS("Found PatherPoint PCH\n");
 434                                 WARN_ON(!(IS_GEN6(dev) || IS_IVYBRIDGE(dev)));
 435                         } else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
 436                                 dev_priv->pch_type = PCH_LPT;
 437                                 dev_priv->num_pch_pll = 0;
 438                                 DRM_DEBUG_KMS("Found LynxPoint PCH\n");
 439                                 WARN_ON(!IS_HASWELL(dev));
 440                         } else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
 441                                 dev_priv->pch_type = PCH_LPT;
 442                                 dev_priv->num_pch_pll = 0;
 443                                 DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
 444                                 WARN_ON(!IS_HASWELL(dev));
 445                         }
 446                         BUG_ON(dev_priv->num_pch_pll > I915_NUM_PLLS);
 447                 }
 448                 pci_dev_put(pch);
 449         }
 450 }
 451
 452 bool i915_semaphore_is_enabled(struct drm_device *dev)
 453 {
 454         if (INTEL_INFO(dev)->gen < 6)
 455                 return 0;
 456
 457         if (i915_semaphores >= 0)
 458                 return i915_semaphores;
 459
 460 #ifdef CONFIG_INTEL_IOMMU
 461         /* Enable semaphores on SNB when IO remapping is off */
 462         if (INTEL_INFO(dev)->gen == 6 && intel_iommu_gfx_mapped)
 463                 return false;
 464 #endif
 465
 466         return 1;
 467 }
 468
 469 static int i915_drm_freeze(struct drm_device *dev)
 470 {
 471         struct drm_i915_private *dev_priv = dev->dev_private;
 472
 473         /* ignore lid events during suspend */
 474         mutex_lock(&dev_priv->modeset_restore_lock);
 475         dev_priv->modeset_restore = MODESET_SUSPENDED;
 476         mutex_unlock(&dev_priv->modeset_restore_lock);
 477
 478         intel_set_power_well(dev, true);
 479
 480         drm_kms_helper_poll_disable(dev);
 481
 482         pci_save_state(dev->pdev);
 483
 484         /* If KMS is active, we do the leavevt stuff here */
 485         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 486                 int error = i915_gem_idle(dev);
 487                 if (error) {
 488                         dev_err(&dev->pdev->dev,
 489                                 "GEM idle failed, resume might fail\n");
 490                         return error;
 491                 }
 492
 493                 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
 494
 495                 intel_modeset_disable(dev);
 496
 497                 drm_irq_uninstall(dev);
 498                 dev_priv->enable_hotplug_processing = false;
 499         }
 500
 501         i915_save_state(dev);
 502
 503         intel_opregion_fini(dev);
 504
 505         console_lock();
 506         intel_fbdev_set_suspend(dev, 1);
 507         console_unlock();
 508
 509         return 0;
 510 }
 511
 512 int i915_suspend(struct drm_device *dev, pm_message_t state)
 513 {
 514         int error;
 515
 516         if (!dev || !dev->dev_private) {
 517                 DRM_ERROR("dev: %p\n", dev);
 518                 DRM_ERROR("DRM not initialized, aborting suspend.\n");
 519                 return -ENODEV;
 520         }
 521
 522         if (state.event == PM_EVENT_PRETHAW)
 523                 return 0;
 524
 525
 526         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 527                 return 0;
 528
 529         error = i915_drm_freeze(dev);
 530         if (error)
 531                 return error;
 532
 533         if (state.event == PM_EVENT_SUSPEND) {
 534                 /* Shut down the device */
 535                 pci_disable_device(dev->pdev);
 536                 pci_set_power_state(dev->pdev, PCI_D3hot);
 537         }
 538
 539         return 0;
 540 }
 541
 542 void intel_console_resume(struct work_struct *work)
 543 {
 544         struct drm_i915_private *dev_priv =
 545                 container_of(work, struct drm_i915_private,
 546                              console_resume_work);
 547         struct drm_device *dev = dev_priv->dev;
 548
 549         console_lock();
 550         intel_fbdev_set_suspend(dev, 0);
 551         console_unlock();
 552 }
 553
 554 static int __i915_drm_thaw(struct drm_device *dev)
 555 {
 556         struct drm_i915_private *dev_priv = dev->dev_private;
 557         int error = 0;
 558
 559         i915_restore_state(dev);
 560         intel_opregion_setup(dev);
 561
 562         /* KMS EnterVT equivalent */
 563         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 564                 intel_init_pch_refclk(dev);
 565
 566                 mutex_lock(&dev->struct_mutex);
 567                 dev_priv->mm.suspended = 0;
 568
 569                 error = i915_gem_init_hw(dev);
 570                 mutex_unlock(&dev->struct_mutex);
 571
 572                 /* We need working interrupts for modeset enabling ... */
 573                 drm_irq_install(dev);
 574
 575                 intel_modeset_init_hw(dev);
 576                 intel_modeset_setup_hw_state(dev, false);
 577
 578                 /*
 579                  * ... but also need to make sure that hotplug processing
 580                  * doesn't cause havoc. Like in the driver load code we don't
 581                  * bother with the tiny race here where we might loose hotplug
 582                  * notifications.
 583                  * */
 584                 intel_hpd_init(dev);
 585                 dev_priv->enable_hotplug_processing = true;
 586         }
 587
 588         intel_opregion_init(dev);
 589
 590         /*
 591          * The console lock can be pretty contented on resume due
 592          * to all the printk activity.  Try to keep it out of the hot
 593          * path of resume if possible.
 594          */
 595         if (console_trylock()) {
 596                 intel_fbdev_set_suspend(dev, 0);
 597                 console_unlock();
 598         } else {
 599                 schedule_work(&dev_priv->console_resume_work);
 600         }
 601
 602         mutex_lock(&dev_priv->modeset_restore_lock);
 603         dev_priv->modeset_restore = MODESET_DONE;
 604         mutex_unlock(&dev_priv->modeset_restore_lock);
 605         return error;
 606 }
 607
 608 static int i915_drm_thaw(struct drm_device *dev)
 609 {
 610         int error = 0;
 611
 612         intel_gt_reset(dev);
 613
 614         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 615                 mutex_lock(&dev->struct_mutex);
 616                 i915_gem_restore_gtt_mappings(dev);
 617                 mutex_unlock(&dev->struct_mutex);
 618         }
 619
 620         __i915_drm_thaw(dev);
 621
 622         return error;
 623 }
 624
 625 int i915_resume(struct drm_device *dev)
 626 {
 627         struct drm_i915_private *dev_priv = dev->dev_private;
 628         int ret;
 629
 630         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 631                 return 0;
 632
 633         if (pci_enable_device(dev->pdev))
 634                 return -EIO;
 635
 636         pci_set_master(dev->pdev);
 637
 638         intel_gt_reset(dev);
 639
 640         /*
 641          * Platforms with opregion should have sane BIOS, older ones (gen3 and
 642          * earlier) need this since the BIOS might clear all our scratch PTEs.
 643          */
 644         if (drm_core_check_feature(dev, DRIVER_MODESET) &&
 645             !dev_priv->opregion.header) {
 646                 mutex_lock(&dev->struct_mutex);
 647                 i915_gem_restore_gtt_mappings(dev);
 648                 mutex_unlock(&dev->struct_mutex);
 649         }
 650
 651         ret = __i915_drm_thaw(dev);
 652         if (ret)
 653                 return ret;
 654
 655         drm_kms_helper_poll_enable(dev);
 656         return 0;
 657 }
 658
 659 static int i8xx_do_reset(struct drm_device *dev)
 660 {
 661         struct drm_i915_private *dev_priv = dev->dev_private;
 662
 663         if (IS_I85X(dev))
 664                 return -ENODEV;
 665
 666         I915_WRITE(D_STATE, I915_READ(D_STATE) | DSTATE_GFX_RESET_I830);
 667         POSTING_READ(D_STATE);
 668
 669         if (IS_I830(dev) || IS_845G(dev)) {
 670                 I915_WRITE(DEBUG_RESET_I830,
 671                            DEBUG_RESET_DISPLAY |
 672                            DEBUG_RESET_RENDER |
 673                            DEBUG_RESET_FULL);
 674                 POSTING_READ(DEBUG_RESET_I830);
 675                 msleep(1);
 676
 677                 I915_WRITE(DEBUG_RESET_I830, 0);
 678                 POSTING_READ(DEBUG_RESET_I830);
 679         }
 680
 681         msleep(1);
 682
 683         I915_WRITE(D_STATE, I915_READ(D_STATE) & ~DSTATE_GFX_RESET_I830);
 684         POSTING_READ(D_STATE);
 685
 686         return 0;
 687 }
 688
 689 static int i965_reset_complete(struct drm_device *dev)
 690 {
 691         u8 gdrst;
 692         pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
 693         return (gdrst & GRDOM_RESET_ENABLE) == 0;
 694 }
 695
 696 static int i965_do_reset(struct drm_device *dev)
 697 {
 698         int ret;
 699         u8 gdrst;
 700
 701         /*
 702          * Set the domains we want to reset (GRDOM/bits 2 and 3) as
 703          * well as the reset bit (GR/bit 0).  Setting the GR bit
 704          * triggers the reset; when done, the hardware will clear it.
 705          */
 706         pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
 707         pci_write_config_byte(dev->pdev, I965_GDRST,
 708                               gdrst | GRDOM_RENDER |
 709                               GRDOM_RESET_ENABLE);
 710         ret =  wait_for(i965_reset_complete(dev), 500);
 711         if (ret)
 712                 return ret;
 713
 714         /* We can't reset render&media without also resetting display ... */
 715         pci_read_config_byte(dev->pdev, I965_GDRST, &gdrst);
 716         pci_write_config_byte(dev->pdev, I965_GDRST,
 717                               gdrst | GRDOM_MEDIA |
 718                               GRDOM_RESET_ENABLE);
 719
 720         return wait_for(i965_reset_complete(dev), 500);
 721 }
 722
 723 static int ironlake_do_reset(struct drm_device *dev)
 724 {
 725         struct drm_i915_private *dev_priv = dev->dev_private;
 726         u32 gdrst;
 727         int ret;
 728
 729         gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
 730         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
 731                    gdrst | GRDOM_RENDER | GRDOM_RESET_ENABLE);
 732         ret = wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
 733         if (ret)
 734                 return ret;
 735
 736         /* We can't reset render&media without also resetting display ... */
 737         gdrst = I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR);
 738         I915_WRITE(MCHBAR_MIRROR_BASE + ILK_GDSR,
 739                    gdrst | GRDOM_MEDIA | GRDOM_RESET_ENABLE);
 740         return wait_for(I915_READ(MCHBAR_MIRROR_BASE + ILK_GDSR) & 0x1, 500);
 741 }
 742
 743 static int gen6_do_reset(struct drm_device *dev)
 744 {
 745         struct drm_i915_private *dev_priv = dev->dev_private;
 746         int     ret;
 747         unsigned long irqflags;
 748
 749         /* Hold gt_lock across reset to prevent any register access
 750          * with forcewake not set correctly
 751          */
 752         spin_lock_irqsave(&dev_priv->gt_lock, irqflags);
 753
 754         /* Reset the chip */
 755
 756         /* GEN6_GDRST is not in the gt power well, no need to check
 757          * for fifo space for the write or forcewake the chip for
 758          * the read
 759          */
 760         I915_WRITE_NOTRACE(GEN6_GDRST, GEN6_GRDOM_FULL);
 761
 762         /* Spin waiting for the device to ack the reset request */
 763         ret = wait_for((I915_READ_NOTRACE(GEN6_GDRST) & GEN6_GRDOM_FULL) == 0, 500);
 764
 765         /* If reset with a user forcewake, try to restore, otherwise turn it off */
 766         if (dev_priv->forcewake_count)
 767                 dev_priv->gt.force_wake_get(dev_priv);
 768         else
 769                 dev_priv->gt.force_wake_put(dev_priv);
 770
 771         /* Restore fifo count */
 772         dev_priv->gt_fifo_count = I915_READ_NOTRACE(GT_FIFO_FREE_ENTRIES);
 773
 774         spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags);
 775         return ret;
 776 }
 777
 778 int intel_gpu_reset(struct drm_device *dev)
 779 {
 780         struct drm_i915_private *dev_priv = dev->dev_private;
 781         int ret = -ENODEV;
 782
 783         switch (INTEL_INFO(dev)->gen) {
 784         case 7:
 785         case 6:
 786                 ret = gen6_do_reset(dev);
 787                 break;
 788         case 5:
 789                 ret = ironlake_do_reset(dev);
 790                 break;
 791         case 4:
 792                 ret = i965_do_reset(dev);
 793                 break;
 794         case 2:
 795                 ret = i8xx_do_reset(dev);
 796                 break;
 797         }
 798
 799         /* Also reset the gpu hangman. */
 800         if (dev_priv->gpu_error.stop_rings) {
 801                 DRM_DEBUG("Simulated gpu hang, resetting stop_rings\n");
 802                 dev_priv->gpu_error.stop_rings = 0;
 803                 if (ret == -ENODEV) {
 804                         DRM_ERROR("Reset not implemented, but ignoring "
 805                                   "error for simulated gpu hangs\n");
 806                         ret = 0;
 807                 }
 808         }
 809
 810         return ret;
 811 }
 812
 813 /**
 814  * i915_reset - reset chip after a hang
 815  * @dev: drm device to reset
 816  *
 817  * Reset the chip.  Useful if a hang is detected. Returns zero on successful
 818  * reset or otherwise an error code.
 819  *
 820  * Procedure is fairly simple:
 821  *   - reset the chip using the reset reg
 822  *   - re-init context state
 823  *   - re-init hardware status page
 824  *   - re-init ring buffer
 825  *   - re-init interrupt state
 826  *   - re-init display
 827  */
 828 int i915_reset(struct drm_device *dev)
 829 {
 830         drm_i915_private_t *dev_priv = dev->dev_private;
 831         int ret;
 832
 833         if (!i915_try_reset)
 834                 return 0;
 835
 836         mutex_lock(&dev->struct_mutex);
 837
 838         i915_gem_reset(dev);
 839
 840         ret = -ENODEV;
 841         if (get_seconds() - dev_priv->gpu_error.last_reset < 5)
 842                 DRM_ERROR("GPU hanging too fast, declaring wedged!\n");
 843         else
 844                 ret = intel_gpu_reset(dev);
 845
 846         dev_priv->gpu_error.last_reset = get_seconds();
 847         if (ret) {
 848                 DRM_ERROR("Failed to reset chip.\n");
 849                 mutex_unlock(&dev->struct_mutex);
 850                 return ret;
 851         }
 852
 853         /* Ok, now get things going again... */
 854
 855         /*
 856          * Everything depends on having the GTT running, so we need to start
 857          * there.  Fortunately we don't need to do this unless we reset the
 858          * chip at a PCI level.
 859          *
 860          * Next we need to restore the context, but we don't use those
 861          * yet either...
 862          *
 863          * Ring buffer needs to be re-initialized in the KMS case, or if X
 864          * was running at the time of the reset (i.e. we weren't VT
 865          * switched away).
 866          */
 867         if (drm_core_check_feature(dev, DRIVER_MODESET) ||
 868                         !dev_priv->mm.suspended) {
 869                 struct intel_ring_buffer *ring;
 870                 int i;
 871
 872                 dev_priv->mm.suspended = 0;
 873
 874                 i915_gem_init_swizzling(dev);
 875
 876                 for_each_ring(ring, dev_priv, i)
 877                         ring->init(ring);
 878
 879                 i915_gem_context_init(dev);
 880                 i915_gem_init_ppgtt(dev);
 881
 882                 /*
 883                  * It would make sense to re-init all the other hw state, at
 884                  * least the rps/rc6/emon init done within modeset_init_hw. For
 885                  * some unknown reason, this blows up my ilk, so don't.
 886                  */
 887
 888                 mutex_unlock(&dev->struct_mutex);
 889
 890                 drm_irq_uninstall(dev);
 891                 drm_irq_install(dev);
 892                 intel_hpd_init(dev);
 893         } else {
 894                 mutex_unlock(&dev->struct_mutex);
 895         }
 896
 897         return 0;
 898 }
 899
 900 static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 901 {
 902         struct intel_device_info *intel_info =
 903                 (struct intel_device_info *) ent->driver_data;
 904
 905         if (intel_info->is_valleyview)
 906                 if(!i915_preliminary_hw_support) {
 907                         DRM_ERROR("Preliminary hardware support disabled\n");
 908                         return -ENODEV;
 909                 }
 910
 911         /* Only bind to function 0 of the device. Early generations
 912          * used function 1 as a placeholder for multi-head. This causes
 913          * us confusion instead, especially on the systems where both
 914          * functions have the same PCI-ID!
 915          */
 916         if (PCI_FUNC(pdev->devfn))
 917                 return -ENODEV;
 918
 919         /* We've managed to ship a kms-enabled ddx that shipped with an XvMC
 920          * implementation for gen3 (and only gen3) that used legacy drm maps
 921          * (gasp!) to share buffers between X and the client. Hence we need to
 922          * keep around the fake agp stuff for gen3, even when kms is enabled. */
 923         if (intel_info->gen != 3) {
 924                 driver.driver_features &=
 925                         ~(DRIVER_USE_AGP | DRIVER_REQUIRE_AGP);
 926         } else if (!intel_agp_enabled) {
 927                 DRM_ERROR("drm/i915 can't work without intel_agp module!\n");
 928                 return -ENODEV;
 929         }
 930
 931         return drm_get_pci_dev(pdev, ent, &driver);
 932 }
 933
 934 static void
 935 i915_pci_remove(struct pci_dev *pdev)
 936 {
 937         struct drm_device *dev = pci_get_drvdata(pdev);
 938
 939         drm_put_dev(dev);
 940 }
 941
 942 static int i915_pm_suspend(struct device *dev)
 943 {
 944         struct pci_dev *pdev = to_pci_dev(dev);
 945         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 946         int error;
 947
 948         if (!drm_dev || !drm_dev->dev_private) {
 949                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 950                 return -ENODEV;
 951         }
 952
 953         if (drm_dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 954                 return 0;
 955
 956         error = i915_drm_freeze(drm_dev);
 957         if (error)
 958                 return error;
 959
 960         pci_disable_device(pdev);
 961         pci_set_power_state(pdev, PCI_D3hot);
 962
 963         return 0;
 964 }
 965
 966 static int i915_pm_resume(struct device *dev)
 967 {
 968         struct pci_dev *pdev = to_pci_dev(dev);
 969         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 970
 971         return i915_resume(drm_dev);
 972 }
 973
 974 static int i915_pm_freeze(struct device *dev)
 975 {
 976         struct pci_dev *pdev = to_pci_dev(dev);
 977         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 978
 979         if (!drm_dev || !drm_dev->dev_private) {
 980                 dev_err(dev, "DRM not initialized, aborting suspend.\n");
 981                 return -ENODEV;
 982         }
 983
 984         return i915_drm_freeze(drm_dev);
 985 }
 986
 987 static int i915_pm_thaw(struct device *dev)
 988 {
 989         struct pci_dev *pdev = to_pci_dev(dev);
 990         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 991
 992         return i915_drm_thaw(drm_dev);
 993 }
 994
 995 static int i915_pm_poweroff(struct device *dev)
 996 {
 997         struct pci_dev *pdev = to_pci_dev(dev);
 998         struct drm_device *drm_dev = pci_get_drvdata(pdev);
 999
1000         return i915_drm_freeze(drm_dev);
1001 }
1002
1003 static const struct dev_pm_ops i915_pm_ops = {
1004         .suspend = i915_pm_suspend,
1005         .resume = i915_pm_resume,
1006         .freeze = i915_pm_freeze,
1007         .thaw = i915_pm_thaw,
1008         .poweroff = i915_pm_poweroff,
1009         .restore = i915_pm_resume,
1010 };
1011
1012 static const struct vm_operations_struct i915_gem_vm_ops = {
1013         .fault = i915_gem_fault,
1014         .open = drm_gem_vm_open,
1015         .close = drm_gem_vm_close,
1016 };
1017
1018 static const struct file_operations i915_driver_fops = {
1019         .owner = THIS_MODULE,
1020         .open = drm_open,
1021         .release = drm_release,
1022         .unlocked_ioctl = drm_ioctl,
1023         .mmap = drm_gem_mmap,
1024         .poll = drm_poll,
1025         .fasync = drm_fasync,
1026         .read = drm_read,
1027 #ifdef CONFIG_COMPAT
1028         .compat_ioctl = i915_compat_ioctl,
1029 #endif
1030         .llseek = noop_llseek,
1031 };
1032
1033 static struct drm_driver driver = {
1034         /* Don't use MTRRs here; the Xserver or userspace app should
1035          * deal with them for Intel hardware.
1036          */
1037         .driver_features =
1038             DRIVER_USE_AGP | DRIVER_REQUIRE_AGP | /* DRIVER_USE_MTRR |*/
1039             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME,
1040         .load = i915_driver_load,
1041         .unload = i915_driver_unload,
1042         .open = i915_driver_open,
1043         .lastclose = i915_driver_lastclose,
1044         .preclose = i915_driver_preclose,
1045         .postclose = i915_driver_postclose,
1046
1047         /* Used in place of i915_pm_ops for non-DRIVER_MODESET */
1048         .suspend = i915_suspend,
1049         .resume = i915_resume,
1050
1051         .device_is_agp = i915_driver_device_is_agp,
1052         .master_create = i915_master_create,
1053         .master_destroy = i915_master_destroy,
1054 #if defined(CONFIG_DEBUG_FS)
1055         .debugfs_init = i915_debugfs_init,
1056         .debugfs_cleanup = i915_debugfs_cleanup,
1057 #endif
1058         .gem_init_object = i915_gem_init_object,
1059         .gem_free_object = i915_gem_free_object,
1060         .gem_vm_ops = &i915_gem_vm_ops,
1061
1062         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
1063         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
1064         .gem_prime_export = i915_gem_prime_export,
1065         .gem_prime_import = i915_gem_prime_import,
1066
1067         .dumb_create = i915_gem_dumb_create,
1068         .dumb_map_offset = i915_gem_mmap_gtt,
1069         .dumb_destroy = i915_gem_dumb_destroy,
1070         .ioctls = i915_ioctls,
1071         .fops = &i915_driver_fops,
1072         .name = DRIVER_NAME,
1073         .desc = DRIVER_DESC,
1074         .date = DRIVER_DATE,
1075         .major = DRIVER_MAJOR,
1076         .minor = DRIVER_MINOR,
1077         .patchlevel = DRIVER_PATCHLEVEL,
1078 };
1079
1080 static struct pci_driver i915_pci_driver = {
1081         .name = DRIVER_NAME,
1082         .id_table = pciidlist,
1083         .probe = i915_pci_probe,
1084         .remove = i915_pci_remove,
1085         .driver.pm = &i915_pm_ops,
1086 };
1087
1088 static int __init i915_init(void)
1089 {
1090         driver.num_ioctls = i915_max_ioctl;
1091
1092         /*
1093          * If CONFIG_DRM_I915_KMS is set, default to KMS unless
1094          * explicitly disabled with the module pararmeter.
1095          *
1096          * Otherwise, just follow the parameter (defaulting to off).
1097          *
1098          * Allow optional vga_text_mode_force boot option to override
1099          * the default behavior.
1100          */
1101 #if defined(CONFIG_DRM_I915_KMS)
1102         if (i915_modeset != 0)
1103                 driver.driver_features |= DRIVER_MODESET;
1104 #endif
1105         if (i915_modeset == 1)
1106                 driver.driver_features |= DRIVER_MODESET;
1107
1108 #ifdef CONFIG_VGA_CONSOLE
1109         if (vgacon_text_force() && i915_modeset == -1)
1110                 driver.driver_features &= ~DRIVER_MODESET;
1111 #endif
1112
1113         if (!(driver.driver_features & DRIVER_MODESET))
1114                 driver.get_vblank_timestamp = NULL;
1115
1116         return drm_pci_init(&driver, &i915_pci_driver);
1117 }
1118
1119 static void __exit i915_exit(void)
1120 {
1121         drm_pci_exit(&driver, &i915_pci_driver);
1122 }
1123
1124 module_init(i915_init);
1125 module_exit(i915_exit);
1126
1127 MODULE_AUTHOR(DRIVER_AUTHOR);
1128 MODULE_DESCRIPTION(DRIVER_DESC);
1129 MODULE_LICENSE("GPL and additional rights");
1130
1131 /* We give fast paths for the really cool registers */
1132 #define NEEDS_FORCE_WAKE(dev_priv, reg) \
1133         ((HAS_FORCE_WAKE((dev_priv)->dev)) && \
1134          ((reg) < 0x40000) &&            \
1135          ((reg) != FORCEWAKE))
1136 static void
1137 ilk_dummy_write(struct drm_i915_private *dev_priv)
1138 {
1139         /* WaIssueDummyWriteToWakeupFromRC6: Issue a dummy write to wake up the
1140          * chip from rc6 before touching it for real. MI_MODE is masked, hence
1141          * harmless to write 0 into. */
1142         I915_WRITE_NOTRACE(MI_MODE, 0);
1143 }
1144
1145 static void
1146 hsw_unclaimed_reg_clear(struct drm_i915_private *dev_priv, u32 reg)
1147 {
1148         if (IS_HASWELL(dev_priv->dev) &&
1149             (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1150                 DRM_ERROR("Unknown unclaimed register before writing to %x\n",
1151                           reg);
1152                 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1153         }
1154 }
1155
1156 static void
1157 hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
1158 {
1159         if (IS_HASWELL(dev_priv->dev) &&
1160             (I915_READ_NOTRACE(FPGA_DBG) & FPGA_DBG_RM_NOCLAIM)) {
1161                 DRM_ERROR("Unclaimed write to %x\n", reg);
1162                 I915_WRITE_NOTRACE(FPGA_DBG, FPGA_DBG_RM_NOCLAIM);
1163         }
1164 }
1165
1166 #define __i915_read(x, y) \
1167 u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
1168         u##x val = 0; \
1169         if (IS_GEN5(dev_priv->dev)) \
1170                 ilk_dummy_write(dev_priv); \
1171         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
1172                 unsigned long irqflags; \
1173                 spin_lock_irqsave(&dev_priv->gt_lock, irqflags); \
1174                 if (dev_priv->forcewake_count == 0) \
1175                         dev_priv->gt.force_wake_get(dev_priv); \
1176                 val = read##y(dev_priv->regs + reg); \
1177                 if (dev_priv->forcewake_count == 0) \
1178                         dev_priv->gt.force_wake_put(dev_priv); \
1179                 spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); \
1180         } else { \
1181                 val = read##y(dev_priv->regs + reg); \
1182         } \
1183         trace_i915_reg_rw(false, reg, val, sizeof(val)); \
1184         return val; \
1185 }
1186
1187 __i915_read(8, b)
1188 __i915_read(16, w)
1189 __i915_read(32, l)
1190 __i915_read(64, q)
1191 #undef __i915_read
1192
1193 #define __i915_write(x, y) \
1194 void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
1195         u32 __fifo_ret = 0; \
1196         trace_i915_reg_rw(true, reg, val, sizeof(val)); \
1197         if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
1198                 __fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \
1199         } \
1200         if (IS_GEN5(dev_priv->dev)) \
1201                 ilk_dummy_write(dev_priv); \
1202         hsw_unclaimed_reg_clear(dev_priv, reg); \
1203         write##y(val, dev_priv->regs + reg); \
1204         if (unlikely(__fifo_ret)) { \
1205                 gen6_gt_check_fifodbg(dev_priv); \
1206         } \
1207         hsw_unclaimed_reg_check(dev_priv, reg); \
1208 }
1209 __i915_write(8, b)
1210 __i915_write(16, w)
1211 __i915_write(32, l)
1212 __i915_write(64, q)
1213 #undef __i915_write
1214
1215 static const struct register_whitelist {
1216         uint64_t offset;
1217         uint32_t size;
1218         uint32_t gen_bitmask; /* support gens, 0x10 for 4, 0x30 for 4 and 5, etc. */
1219 } whitelist[] = {
1220         { RING_TIMESTAMP(RENDER_RING_BASE), 8, 0xF0 },
1221 };
1222
1223 int i915_reg_read_ioctl(struct drm_device *dev,
1224                         void *data, struct drm_file *file)
1225 {
1226         struct drm_i915_private *dev_priv = dev->dev_private;
1227         struct drm_i915_reg_read *reg = data;
1228         struct register_whitelist const *entry = whitelist;
1229         int i;
1230
1231         for (i = 0; i < ARRAY_SIZE(whitelist); i++, entry++) {
1232                 if (entry->offset == reg->offset &&
1233                     (1 << INTEL_INFO(dev)->gen & entry->gen_bitmask))
1234                         break;
1235         }
1236
1237         if (i == ARRAY_SIZE(whitelist))
1238                 return -EINVAL;
1239
1240         switch (entry->size) {
1241         case 8:
1242                 reg->val = I915_READ64(reg->offset);
1243                 break;
1244         case 4:
1245                 reg->val = I915_READ(reg->offset);
1246                 break;
1247         case 2:
1248                 reg->val = I915_READ16(reg->offset);
1249                 break;
1250         case 1:
1251                 reg->val = I915_READ8(reg->offset);
1252                 break;
1253         default:
1254                 WARN_ON(1);
1255                 return -EINVAL;
1256         }
1257
1258         return 0;
1259 }