drivers/gpu/drm/i915/i915_drv.h

   1 /* i915_drv.h -- Private header for the 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 #ifndef _I915_DRV_H_
  31 #define _I915_DRV_H_
  32
  33 #include "i915_reg.h"
  34 #include "intel_bios.h"
  35 #include "intel_ringbuffer.h"
  36 #include <linux/io-mapping.h>
  37 #include <linux/i2c.h>
  38 #include <linux/i2c-algo-bit.h>
  39 #include <drm/intel-gtt.h>
  40 #include <linux/backlight.h>
  41 #include <linux/intel-iommu.h>
  42 #include <linux/kref.h>
  43
  44 /* General customization:
  45  */
  46
  47 #define DRIVER_AUTHOR           "Tungsten Graphics, Inc."
  48
  49 #define DRIVER_NAME             "i915"
  50 #define DRIVER_DESC             "Intel Graphics"
  51 #define DRIVER_DATE             "20080730"
  52
  53 enum pipe {
  54         PIPE_A = 0,
  55         PIPE_B,
  56         PIPE_C,
  57         I915_MAX_PIPES
  58 };
  59 #define pipe_name(p) ((p) + 'A')
  60
  61 enum plane {
  62         PLANE_A = 0,
  63         PLANE_B,
  64         PLANE_C,
  65 };
  66 #define plane_name(p) ((p) + 'A')
  67
  68 enum port {
  69         PORT_A = 0,
  70         PORT_B,
  71         PORT_C,
  72         PORT_D,
  73         PORT_E,
  74         I915_MAX_PORTS
  75 };
  76 #define port_name(p) ((p) + 'A')
  77
  78 #define I915_GEM_GPU_DOMAINS    (~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT))
  79
  80 #define for_each_pipe(p) for ((p) = 0; (p) < dev_priv->num_pipe; (p)++)
  81
  82 #define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
  83         list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
  84                 if ((intel_encoder)->base.crtc == (__crtc))
  85
  86 struct intel_pch_pll {
  87         int refcount; /* count of number of CRTCs sharing this PLL */
  88         int active; /* count of number of active CRTCs (i.e. DPMS on) */
  89         bool on; /* is the PLL actually active? Disabled during modeset */
  90         int pll_reg;
  91         int fp0_reg;
  92         int fp1_reg;
  93 };
  94 #define I915_NUM_PLLS 2
  95
  96 /* Interface history:
  97  *
  98  * 1.1: Original.
  99  * 1.2: Add Power Management
 100  * 1.3: Add vblank support
 101  * 1.4: Fix cmdbuffer path, add heap destroy
 102  * 1.5: Add vblank pipe configuration
 103  * 1.6: - New ioctl for scheduling buffer swaps on vertical blank
 104  *      - Support vertical blank on secondary display pipe
 105  */
 106 #define DRIVER_MAJOR            1
 107 #define DRIVER_MINOR            6
 108 #define DRIVER_PATCHLEVEL       0
 109
 110 #define WATCH_COHERENCY 0
 111 #define WATCH_LISTS     0
 112 #define WATCH_GTT       0
 113
 114 #define I915_GEM_PHYS_CURSOR_0 1
 115 #define I915_GEM_PHYS_CURSOR_1 2
 116 #define I915_GEM_PHYS_OVERLAY_REGS 3
 117 #define I915_MAX_PHYS_OBJECT (I915_GEM_PHYS_OVERLAY_REGS)
 118
 119 struct drm_i915_gem_phys_object {
 120         int id;
 121         struct page **page_list;
 122         drm_dma_handle_t *handle;
 123         struct drm_i915_gem_object *cur_obj;
 124 };
 125
 126 struct mem_block {
 127         struct mem_block *next;
 128         struct mem_block *prev;
 129         int start;
 130         int size;
 131         struct drm_file *file_priv; /* NULL: free, -1: heap, other: real files */
 132 };
 133
 134 struct opregion_header;
 135 struct opregion_acpi;
 136 struct opregion_swsci;
 137 struct opregion_asle;
 138 struct drm_i915_private;
 139
 140 struct intel_opregion {
 141         struct opregion_header __iomem *header;
 142         struct opregion_acpi __iomem *acpi;
 143         struct opregion_swsci __iomem *swsci;
 144         struct opregion_asle __iomem *asle;
 145         void __iomem *vbt;
 146         u32 __iomem *lid_state;
 147 };
 148 #define OPREGION_SIZE            (8*1024)
 149
 150 struct intel_overlay;
 151 struct intel_overlay_error_state;
 152
 153 struct drm_i915_master_private {
 154         drm_local_map_t *sarea;
 155         struct _drm_i915_sarea *sarea_priv;
 156 };
 157 #define I915_FENCE_REG_NONE -1
 158 #define I915_MAX_NUM_FENCES 16
 159 /* 16 fences + sign bit for FENCE_REG_NONE */
 160 #define I915_MAX_NUM_FENCE_BITS 5
 161
 162 struct drm_i915_fence_reg {
 163         struct list_head lru_list;
 164         struct drm_i915_gem_object *obj;
 165         int pin_count;
 166 };
 167
 168 struct sdvo_device_mapping {
 169         u8 initialized;
 170         u8 dvo_port;
 171         u8 slave_addr;
 172         u8 dvo_wiring;
 173         u8 i2c_pin;
 174         u8 ddc_pin;
 175 };
 176
 177 struct intel_display_error_state;
 178
 179 struct drm_i915_error_state {
 180         struct kref ref;
 181         u32 eir;
 182         u32 pgtbl_er;
 183         u32 ier;
 184         u32 ccid;
 185         bool waiting[I915_NUM_RINGS];
 186         u32 pipestat[I915_MAX_PIPES];
 187         u32 tail[I915_NUM_RINGS];
 188         u32 head[I915_NUM_RINGS];
 189         u32 ipeir[I915_NUM_RINGS];
 190         u32 ipehr[I915_NUM_RINGS];
 191         u32 instdone[I915_NUM_RINGS];
 192         u32 acthd[I915_NUM_RINGS];
 193         u32 semaphore_mboxes[I915_NUM_RINGS][I915_NUM_RINGS - 1];
 194         u32 rc_psmi[I915_NUM_RINGS]; /* sleep state */
 195         /* our own tracking of ring head and tail */
 196         u32 cpu_ring_head[I915_NUM_RINGS];
 197         u32 cpu_ring_tail[I915_NUM_RINGS];
 198         u32 error; /* gen6+ */
 199         u32 err_int; /* gen7 */
 200         u32 instpm[I915_NUM_RINGS];
 201         u32 instps[I915_NUM_RINGS];
 202         u32 instdone1;
 203         u32 seqno[I915_NUM_RINGS];
 204         u64 bbaddr;
 205         u32 fault_reg[I915_NUM_RINGS];
 206         u32 done_reg;
 207         u32 faddr[I915_NUM_RINGS];
 208         u64 fence[I915_MAX_NUM_FENCES];
 209         struct timeval time;
 210         struct drm_i915_error_ring {
 211                 struct drm_i915_error_object {
 212                         int page_count;
 213                         u32 gtt_offset;
 214                         u32 *pages[0];
 215                 } *ringbuffer, *batchbuffer;
 216                 struct drm_i915_error_request {
 217                         long jiffies;
 218                         u32 seqno;
 219                         u32 tail;
 220                 } *requests;
 221                 int num_requests;
 222         } ring[I915_NUM_RINGS];
 223         struct drm_i915_error_buffer {
 224                 u32 size;
 225                 u32 name;
 226                 u32 rseqno, wseqno;
 227                 u32 gtt_offset;
 228                 u32 read_domains;
 229                 u32 write_domain;
 230                 s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
 231                 s32 pinned:2;
 232                 u32 tiling:2;
 233                 u32 dirty:1;
 234                 u32 purgeable:1;
 235                 s32 ring:4;
 236                 u32 cache_level:2;
 237         } *active_bo, *pinned_bo;
 238         u32 active_bo_count, pinned_bo_count;
 239         struct intel_overlay_error_state *overlay;
 240         struct intel_display_error_state *display;
 241 };
 242
 243 struct drm_i915_display_funcs {
 244         void (*dpms)(struct drm_crtc *crtc, int mode);
 245         bool (*fbc_enabled)(struct drm_device *dev);
 246         void (*enable_fbc)(struct drm_crtc *crtc, unsigned long interval);
 247         void (*disable_fbc)(struct drm_device *dev);
 248         int (*get_display_clock_speed)(struct drm_device *dev);
 249         int (*get_fifo_size)(struct drm_device *dev, int plane);
 250         void (*update_wm)(struct drm_device *dev);
 251         void (*update_sprite_wm)(struct drm_device *dev, int pipe,
 252                                  uint32_t sprite_width, int pixel_size);
 253         void (*update_linetime_wm)(struct drm_device *dev, int pipe,
 254                                  struct drm_display_mode *mode);
 255         int (*crtc_mode_set)(struct drm_crtc *crtc,
 256                              struct drm_display_mode *mode,
 257                              struct drm_display_mode *adjusted_mode,
 258                              int x, int y,
 259                              struct drm_framebuffer *old_fb);
 260         void (*off)(struct drm_crtc *crtc);
 261         void (*write_eld)(struct drm_connector *connector,
 262                           struct drm_crtc *crtc);
 263         void (*fdi_link_train)(struct drm_crtc *crtc);
 264         void (*init_clock_gating)(struct drm_device *dev);
 265         void (*init_pch_clock_gating)(struct drm_device *dev);
 266         int (*queue_flip)(struct drm_device *dev, struct drm_crtc *crtc,
 267                           struct drm_framebuffer *fb,
 268                           struct drm_i915_gem_object *obj);
 269         int (*update_plane)(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 270                             int x, int y);
 271         /* clock updates for mode set */
 272         /* cursor updates */
 273         /* render clock increase/decrease */
 274         /* display clock increase/decrease */
 275         /* pll clock increase/decrease */
 276 };
 277
 278 struct drm_i915_gt_funcs {
 279         void (*force_wake_get)(struct drm_i915_private *dev_priv);
 280         void (*force_wake_put)(struct drm_i915_private *dev_priv);
 281 };
 282
 283 #define DEV_INFO_FLAGS \
 284         DEV_INFO_FLAG(is_mobile) DEV_INFO_SEP \
 285         DEV_INFO_FLAG(is_i85x) DEV_INFO_SEP \
 286         DEV_INFO_FLAG(is_i915g) DEV_INFO_SEP \
 287         DEV_INFO_FLAG(is_i945gm) DEV_INFO_SEP \
 288         DEV_INFO_FLAG(is_g33) DEV_INFO_SEP \
 289         DEV_INFO_FLAG(need_gfx_hws) DEV_INFO_SEP \
 290         DEV_INFO_FLAG(is_g4x) DEV_INFO_SEP \
 291         DEV_INFO_FLAG(is_pineview) DEV_INFO_SEP \
 292         DEV_INFO_FLAG(is_broadwater) DEV_INFO_SEP \
 293         DEV_INFO_FLAG(is_crestline) DEV_INFO_SEP \
 294         DEV_INFO_FLAG(is_ivybridge) DEV_INFO_SEP \
 295         DEV_INFO_FLAG(is_valleyview) DEV_INFO_SEP \
 296         DEV_INFO_FLAG(is_haswell) DEV_INFO_SEP \
 297         DEV_INFO_FLAG(has_force_wake) DEV_INFO_SEP \
 298         DEV_INFO_FLAG(has_fbc) DEV_INFO_SEP \
 299         DEV_INFO_FLAG(has_pipe_cxsr) DEV_INFO_SEP \
 300         DEV_INFO_FLAG(has_hotplug) DEV_INFO_SEP \
 301         DEV_INFO_FLAG(cursor_needs_physical) DEV_INFO_SEP \
 302         DEV_INFO_FLAG(has_overlay) DEV_INFO_SEP \
 303         DEV_INFO_FLAG(overlay_needs_physical) DEV_INFO_SEP \
 304         DEV_INFO_FLAG(supports_tv) DEV_INFO_SEP \
 305         DEV_INFO_FLAG(has_bsd_ring) DEV_INFO_SEP \
 306         DEV_INFO_FLAG(has_blt_ring) DEV_INFO_SEP \
 307         DEV_INFO_FLAG(has_llc)
 308
 309 struct intel_device_info {
 310         u8 gen;
 311         u8 is_mobile:1;
 312         u8 is_i85x:1;
 313         u8 is_i915g:1;
 314         u8 is_i945gm:1;
 315         u8 is_g33:1;
 316         u8 need_gfx_hws:1;
 317         u8 is_g4x:1;
 318         u8 is_pineview:1;
 319         u8 is_broadwater:1;
 320         u8 is_crestline:1;
 321         u8 is_ivybridge:1;
 322         u8 is_valleyview:1;
 323         u8 has_force_wake:1;
 324         u8 is_haswell:1;
 325         u8 has_fbc:1;
 326         u8 has_pipe_cxsr:1;
 327         u8 has_hotplug:1;
 328         u8 cursor_needs_physical:1;
 329         u8 has_overlay:1;
 330         u8 overlay_needs_physical:1;
 331         u8 supports_tv:1;
 332         u8 has_bsd_ring:1;
 333         u8 has_blt_ring:1;
 334         u8 has_llc:1;
 335 };
 336
 337 #define I915_PPGTT_PD_ENTRIES 512
 338 #define I915_PPGTT_PT_ENTRIES 1024
 339 struct i915_hw_ppgtt {
 340         unsigned num_pd_entries;
 341         struct page **pt_pages;
 342         uint32_t pd_offset;
 343         dma_addr_t *pt_dma_addr;
 344         dma_addr_t scratch_page_dma_addr;
 345 };
 346
 347
 348 /* This must match up with the value previously used for execbuf2.rsvd1. */
 349 #define DEFAULT_CONTEXT_ID 0
 350 struct i915_hw_context {
 351         int id;
 352         bool is_initialized;
 353         struct drm_i915_file_private *file_priv;
 354         struct intel_ring_buffer *ring;
 355         struct drm_i915_gem_object *obj;
 356 };
 357
 358 enum no_fbc_reason {
 359         FBC_NO_OUTPUT, /* no outputs enabled to compress */
 360         FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */
 361         FBC_UNSUPPORTED_MODE, /* interlace or doublescanned mode */
 362         FBC_MODE_TOO_LARGE, /* mode too large for compression */
 363         FBC_BAD_PLANE, /* fbc not supported on plane */
 364         FBC_NOT_TILED, /* buffer not tiled */
 365         FBC_MULTIPLE_PIPES, /* more than one pipe active */
 366         FBC_MODULE_PARAM,
 367 };
 368
 369 enum intel_pch {
 370         PCH_NONE = 0,   /* No PCH present */
 371         PCH_IBX,        /* Ibexpeak PCH */
 372         PCH_CPT,        /* Cougarpoint PCH */
 373         PCH_LPT,        /* Lynxpoint PCH */
 374 };
 375
 376 #define QUIRK_PIPEA_FORCE (1<<0)
 377 #define QUIRK_LVDS_SSC_DISABLE (1<<1)
 378 #define QUIRK_INVERT_BRIGHTNESS (1<<2)
 379
 380 struct intel_fbdev;
 381 struct intel_fbc_work;
 382
 383 struct intel_gmbus {
 384         struct i2c_adapter adapter;
 385         bool force_bit;
 386         u32 reg0;
 387         u32 gpio_reg;
 388         struct i2c_algo_bit_data bit_algo;
 389         struct drm_i915_private *dev_priv;
 390 };
 391
 392 typedef struct drm_i915_private {
 393         struct drm_device *dev;
 394
 395         const struct intel_device_info *info;
 396
 397         int relative_constants_mode;
 398
 399         void __iomem *regs;
 400
 401         struct drm_i915_gt_funcs gt;
 402         /** gt_fifo_count and the subsequent register write are synchronized
 403          * with dev->struct_mutex. */
 404         unsigned gt_fifo_count;
 405         /** forcewake_count is protected by gt_lock */
 406         unsigned forcewake_count;
 407         /** gt_lock is also taken in irq contexts. */
 408         struct spinlock gt_lock;
 409
 410         struct intel_gmbus gmbus[GMBUS_NUM_PORTS];
 411
 412         /** gmbus_mutex protects against concurrent usage of the single hw gmbus
 413          * controller on different i2c buses. */
 414         struct mutex gmbus_mutex;
 415
 416         /**
 417          * Base address of the gmbus and gpio block.
 418          */
 419         uint32_t gpio_mmio_base;
 420
 421         struct pci_dev *bridge_dev;
 422         struct intel_ring_buffer ring[I915_NUM_RINGS];
 423         uint32_t next_seqno;
 424
 425         drm_dma_handle_t *status_page_dmah;
 426         uint32_t counter;
 427         struct drm_i915_gem_object *pwrctx;
 428         struct drm_i915_gem_object *renderctx;
 429
 430         struct resource mch_res;
 431
 432         atomic_t irq_received;
 433
 434         /* protects the irq masks */
 435         spinlock_t irq_lock;
 436
 437         /* DPIO indirect register protection */
 438         spinlock_t dpio_lock;
 439
 440         /** Cached value of IMR to avoid reads in updating the bitfield */
 441         u32 pipestat[2];
 442         u32 irq_mask;
 443         u32 gt_irq_mask;
 444         u32 pch_irq_mask;
 445
 446         u32 hotplug_supported_mask;
 447         struct work_struct hotplug_work;
 448
 449         int num_pipe;
 450         int num_pch_pll;
 451
 452         /* For hangcheck timer */
 453 #define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */
 454         struct timer_list hangcheck_timer;
 455         int hangcheck_count;
 456         uint32_t last_acthd[I915_NUM_RINGS];
 457         uint32_t last_instdone;
 458         uint32_t last_instdone1;
 459
 460         unsigned int stop_rings;
 461
 462         unsigned long cfb_size;
 463         unsigned int cfb_fb;
 464         enum plane cfb_plane;
 465         int cfb_y;
 466         struct intel_fbc_work *fbc_work;
 467
 468         struct intel_opregion opregion;
 469
 470         /* overlay */
 471         struct intel_overlay *overlay;
 472         bool sprite_scaling_enabled;
 473
 474         /* LVDS info */
 475         int backlight_level;  /* restore backlight to this value */
 476         bool backlight_enabled;
 477         struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */
 478         struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */
 479
 480         /* Feature bits from the VBIOS */
 481         unsigned int int_tv_support:1;
 482         unsigned int lvds_dither:1;
 483         unsigned int lvds_vbt:1;
 484         unsigned int int_crt_support:1;
 485         unsigned int lvds_use_ssc:1;
 486         unsigned int display_clock_mode:1;
 487         int lvds_ssc_freq;
 488         unsigned int bios_lvds_val; /* initial [PCH_]LVDS reg val in VBIOS */
 489         unsigned int lvds_val; /* used for checking LVDS channel mode */
 490         struct {
 491                 int rate;
 492                 int lanes;
 493                 int preemphasis;
 494                 int vswing;
 495
 496                 bool initialized;
 497                 bool support;
 498                 int bpp;
 499                 struct edp_power_seq pps;
 500         } edp;
 501         bool no_aux_handshake;
 502
 503         struct notifier_block lid_notifier;
 504
 505         int crt_ddc_pin;
 506         struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
 507         int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */
 508         int num_fence_regs; /* 8 on pre-965, 16 otherwise */
 509
 510         unsigned int fsb_freq, mem_freq, is_ddr3;
 511
 512         spinlock_t error_lock;
 513         /* Protected by dev->error_lock. */
 514         struct drm_i915_error_state *first_error;
 515         struct work_struct error_work;
 516         struct completion error_completion;
 517         struct workqueue_struct *wq;
 518
 519         /* Display functions */
 520         struct drm_i915_display_funcs display;
 521
 522         /* PCH chipset type */
 523         enum intel_pch pch_type;
 524
 525         unsigned long quirks;
 526
 527         /* Register state */
 528         bool modeset_on_lid;
 529         u8 saveLBB;
 530         u32 saveDSPACNTR;
 531         u32 saveDSPBCNTR;
 532         u32 saveDSPARB;
 533         u32 saveHWS;
 534         u32 savePIPEACONF;
 535         u32 savePIPEBCONF;
 536         u32 savePIPEASRC;
 537         u32 savePIPEBSRC;
 538         u32 saveFPA0;
 539         u32 saveFPA1;
 540         u32 saveDPLL_A;
 541         u32 saveDPLL_A_MD;
 542         u32 saveHTOTAL_A;
 543         u32 saveHBLANK_A;
 544         u32 saveHSYNC_A;
 545         u32 saveVTOTAL_A;
 546         u32 saveVBLANK_A;
 547         u32 saveVSYNC_A;
 548         u32 saveBCLRPAT_A;
 549         u32 saveTRANSACONF;
 550         u32 saveTRANS_HTOTAL_A;
 551         u32 saveTRANS_HBLANK_A;
 552         u32 saveTRANS_HSYNC_A;
 553         u32 saveTRANS_VTOTAL_A;
 554         u32 saveTRANS_VBLANK_A;
 555         u32 saveTRANS_VSYNC_A;
 556         u32 savePIPEASTAT;
 557         u32 saveDSPASTRIDE;
 558         u32 saveDSPASIZE;
 559         u32 saveDSPAPOS;
 560         u32 saveDSPAADDR;
 561         u32 saveDSPASURF;
 562         u32 saveDSPATILEOFF;
 563         u32 savePFIT_PGM_RATIOS;
 564         u32 saveBLC_HIST_CTL;
 565         u32 saveBLC_PWM_CTL;
 566         u32 saveBLC_PWM_CTL2;
 567         u32 saveBLC_CPU_PWM_CTL;
 568         u32 saveBLC_CPU_PWM_CTL2;
 569         u32 saveFPB0;
 570         u32 saveFPB1;
 571         u32 saveDPLL_B;
 572         u32 saveDPLL_B_MD;
 573         u32 saveHTOTAL_B;
 574         u32 saveHBLANK_B;
 575         u32 saveHSYNC_B;
 576         u32 saveVTOTAL_B;
 577         u32 saveVBLANK_B;
 578         u32 saveVSYNC_B;
 579         u32 saveBCLRPAT_B;
 580         u32 saveTRANSBCONF;
 581         u32 saveTRANS_HTOTAL_B;
 582         u32 saveTRANS_HBLANK_B;
 583         u32 saveTRANS_HSYNC_B;
 584         u32 saveTRANS_VTOTAL_B;
 585         u32 saveTRANS_VBLANK_B;
 586         u32 saveTRANS_VSYNC_B;
 587         u32 savePIPEBSTAT;
 588         u32 saveDSPBSTRIDE;
 589         u32 saveDSPBSIZE;
 590         u32 saveDSPBPOS;
 591         u32 saveDSPBADDR;
 592         u32 saveDSPBSURF;
 593         u32 saveDSPBTILEOFF;
 594         u32 saveVGA0;
 595         u32 saveVGA1;
 596         u32 saveVGA_PD;
 597         u32 saveVGACNTRL;
 598         u32 saveADPA;
 599         u32 saveLVDS;
 600         u32 savePP_ON_DELAYS;
 601         u32 savePP_OFF_DELAYS;
 602         u32 saveDVOA;
 603         u32 saveDVOB;
 604         u32 saveDVOC;
 605         u32 savePP_ON;
 606         u32 savePP_OFF;
 607         u32 savePP_CONTROL;
 608         u32 savePP_DIVISOR;
 609         u32 savePFIT_CONTROL;
 610         u32 save_palette_a[256];
 611         u32 save_palette_b[256];
 612         u32 saveDPFC_CB_BASE;
 613         u32 saveFBC_CFB_BASE;
 614         u32 saveFBC_LL_BASE;
 615         u32 saveFBC_CONTROL;
 616         u32 saveFBC_CONTROL2;
 617         u32 saveIER;
 618         u32 saveIIR;
 619         u32 saveIMR;
 620         u32 saveDEIER;
 621         u32 saveDEIMR;
 622         u32 saveGTIER;
 623         u32 saveGTIMR;
 624         u32 saveFDI_RXA_IMR;
 625         u32 saveFDI_RXB_IMR;
 626         u32 saveCACHE_MODE_0;
 627         u32 saveMI_ARB_STATE;
 628         u32 saveSWF0[16];
 629         u32 saveSWF1[16];
 630         u32 saveSWF2[3];
 631         u8 saveMSR;
 632         u8 saveSR[8];
 633         u8 saveGR[25];
 634         u8 saveAR_INDEX;
 635         u8 saveAR[21];
 636         u8 saveDACMASK;
 637         u8 saveCR[37];
 638         uint64_t saveFENCE[I915_MAX_NUM_FENCES];
 639         u32 saveCURACNTR;
 640         u32 saveCURAPOS;
 641         u32 saveCURABASE;
 642         u32 saveCURBCNTR;
 643         u32 saveCURBPOS;
 644         u32 saveCURBBASE;
 645         u32 saveCURSIZE;
 646         u32 saveDP_B;
 647         u32 saveDP_C;
 648         u32 saveDP_D;
 649         u32 savePIPEA_GMCH_DATA_M;
 650         u32 savePIPEB_GMCH_DATA_M;
 651         u32 savePIPEA_GMCH_DATA_N;
 652         u32 savePIPEB_GMCH_DATA_N;
 653         u32 savePIPEA_DP_LINK_M;
 654         u32 savePIPEB_DP_LINK_M;
 655         u32 savePIPEA_DP_LINK_N;
 656         u32 savePIPEB_DP_LINK_N;
 657         u32 saveFDI_RXA_CTL;
 658         u32 saveFDI_TXA_CTL;
 659         u32 saveFDI_RXB_CTL;
 660         u32 saveFDI_TXB_CTL;
 661         u32 savePFA_CTL_1;
 662         u32 savePFB_CTL_1;
 663         u32 savePFA_WIN_SZ;
 664         u32 savePFB_WIN_SZ;
 665         u32 savePFA_WIN_POS;
 666         u32 savePFB_WIN_POS;
 667         u32 savePCH_DREF_CONTROL;
 668         u32 saveDISP_ARB_CTL;
 669         u32 savePIPEA_DATA_M1;
 670         u32 savePIPEA_DATA_N1;
 671         u32 savePIPEA_LINK_M1;
 672         u32 savePIPEA_LINK_N1;
 673         u32 savePIPEB_DATA_M1;
 674         u32 savePIPEB_DATA_N1;
 675         u32 savePIPEB_LINK_M1;
 676         u32 savePIPEB_LINK_N1;
 677         u32 saveMCHBAR_RENDER_STANDBY;
 678         u32 savePCH_PORT_HOTPLUG;
 679
 680         struct {
 681                 /** Bridge to intel-gtt-ko */
 682                 const struct intel_gtt *gtt;
 683                 /** Memory allocator for GTT stolen memory */
 684                 struct drm_mm stolen;
 685                 /** Memory allocator for GTT */
 686                 struct drm_mm gtt_space;
 687                 /** List of all objects in gtt_space. Used to restore gtt
 688                  * mappings on resume */
 689                 struct list_head bound_list;
 690                 /**
 691                  * List of objects which are not bound to the GTT (thus
 692                  * are idle and not used by the GPU) but still have
 693                  * (presumably uncached) pages still attached.
 694                  */
 695                 struct list_head unbound_list;
 696
 697                 /** Usable portion of the GTT for GEM */
 698                 unsigned long gtt_start;
 699                 unsigned long gtt_mappable_end;
 700                 unsigned long gtt_end;
 701
 702                 struct io_mapping *gtt_mapping;
 703                 phys_addr_t gtt_base_addr;
 704                 int gtt_mtrr;
 705
 706                 /** PPGTT used for aliasing the PPGTT with the GTT */
 707                 struct i915_hw_ppgtt *aliasing_ppgtt;
 708
 709                 u32 *l3_remap_info;
 710
 711                 struct shrinker inactive_shrinker;
 712
 713                 /**
 714                  * List of objects currently involved in rendering.
 715                  *
 716                  * Includes buffers having the contents of their GPU caches
 717                  * flushed, not necessarily primitives.  last_rendering_seqno
 718                  * represents when the rendering involved will be completed.
 719                  *
 720                  * A reference is held on the buffer while on this list.
 721                  */
 722                 struct list_head active_list;
 723
 724                 /**
 725                  * LRU list of objects which are not in the ringbuffer and
 726                  * are ready to unbind, but are still in the GTT.
 727                  *
 728                  * last_rendering_seqno is 0 while an object is in this list.
 729                  *
 730                  * A reference is not held on the buffer while on this list,
 731                  * as merely being GTT-bound shouldn't prevent its being
 732                  * freed, and we'll pull it off the list in the free path.
 733                  */
 734                 struct list_head inactive_list;
 735
 736                 /** LRU list of objects with fence regs on them. */
 737                 struct list_head fence_list;
 738
 739                 /**
 740                  * We leave the user IRQ off as much as possible,
 741                  * but this means that requests will finish and never
 742                  * be retired once the system goes idle. Set a timer to
 743                  * fire periodically while the ring is running. When it
 744                  * fires, go retire requests.
 745                  */
 746                 struct delayed_work retire_work;
 747
 748                 /**
 749                  * Are we in a non-interruptible section of code like
 750                  * modesetting?
 751                  */
 752                 bool interruptible;
 753
 754                 /**
 755                  * Flag if the X Server, and thus DRM, is not currently in
 756                  * control of the device.
 757                  *
 758                  * This is set between LeaveVT and EnterVT.  It needs to be
 759                  * replaced with a semaphore.  It also needs to be
 760                  * transitioned away from for kernel modesetting.
 761                  */
 762                 int suspended;
 763
 764                 /**
 765                  * Flag if the hardware appears to be wedged.
 766                  *
 767                  * This is set when attempts to idle the device timeout.
 768                  * It prevents command submission from occurring and makes
 769                  * every pending request fail
 770                  */
 771                 atomic_t wedged;
 772
 773                 /** Bit 6 swizzling required for X tiling */
 774                 uint32_t bit_6_swizzle_x;
 775                 /** Bit 6 swizzling required for Y tiling */
 776                 uint32_t bit_6_swizzle_y;
 777
 778                 /* storage for physical objects */
 779                 struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT];
 780
 781                 /* accounting, useful for userland debugging */
 782                 size_t gtt_total;
 783                 size_t mappable_gtt_total;
 784                 size_t object_memory;
 785                 u32 object_count;
 786         } mm;
 787
 788         /* Old dri1 support infrastructure, beware the dragons ya fools entering
 789          * here! */
 790         struct {
 791                 unsigned allow_batchbuffer : 1;
 792                 u32 __iomem *gfx_hws_cpu_addr;
 793
 794                 unsigned int cpp;
 795                 int back_offset;
 796                 int front_offset;
 797                 int current_page;
 798                 int page_flipping;
 799         } dri1;
 800
 801         /* Kernel Modesetting */
 802
 803         struct sdvo_device_mapping sdvo_mappings[2];
 804         /* indicate whether the LVDS_BORDER should be enabled or not */
 805         unsigned int lvds_border_bits;
 806         /* Panel fitter placement and size for Ironlake+ */
 807         u32 pch_pf_pos, pch_pf_size;
 808
 809         struct drm_crtc *plane_to_crtc_mapping[3];
 810         struct drm_crtc *pipe_to_crtc_mapping[3];
 811         wait_queue_head_t pending_flip_queue;
 812
 813         struct intel_pch_pll pch_plls[I915_NUM_PLLS];
 814
 815         /* Reclocking support */
 816         bool render_reclock_avail;
 817         bool lvds_downclock_avail;
 818         /* indicates the reduced downclock for LVDS*/
 819         int lvds_downclock;
 820         u16 orig_clock;
 821         int child_dev_num;
 822         struct child_device_config *child_dev;
 823         struct drm_connector *int_lvds_connector;
 824         struct drm_connector *int_edp_connector;
 825
 826         bool mchbar_need_disable;
 827
 828         /* gen6+ rps state */
 829         struct {
 830                 struct work_struct work;
 831                 u32 pm_iir;
 832                 /* lock - irqsave spinlock that protectects the work_struct and
 833                  * pm_iir. */
 834                 spinlock_t lock;
 835
 836                 /* The below variables an all the rps hw state are protected by
 837                  * dev->struct mutext. */
 838                 u8 cur_delay;
 839                 u8 min_delay;
 840                 u8 max_delay;
 841         } rps;
 842
 843
 844         u8 cur_delay;
 845         u8 min_delay;
 846         u8 max_delay;
 847         u8 fmax;
 848         u8 fstart;
 849
 850         u64 last_count1;
 851         unsigned long last_time1;
 852         unsigned long chipset_power;
 853         u64 last_count2;
 854         struct timespec last_time2;
 855         unsigned long gfx_power;
 856         int c_m;
 857         int r_t;
 858         u8 corr;
 859
 860         enum no_fbc_reason no_fbc_reason;
 861
 862         struct drm_mm_node *compressed_fb;
 863         struct drm_mm_node *compressed_llb;
 864
 865         unsigned long last_gpu_reset;
 866
 867         /* list of fbdev register on this device */
 868         struct intel_fbdev *fbdev;
 869
 870         struct backlight_device *backlight;
 871
 872         struct drm_property *broadcast_rgb_property;
 873         struct drm_property *force_audio_property;
 874
 875         struct work_struct parity_error_work;
 876         bool hw_contexts_disabled;
 877         uint32_t hw_context_size;
 878 } drm_i915_private_t;
 879
 880 /* Iterate over initialised rings */
 881 #define for_each_ring(ring__, dev_priv__, i__) \
 882         for ((i__) = 0; (i__) < I915_NUM_RINGS; (i__)++) \
 883                 if (((ring__) = &(dev_priv__)->ring[(i__)]), intel_ring_initialized((ring__)))
 884
 885 enum hdmi_force_audio {
 886         HDMI_AUDIO_OFF_DVI = -2,        /* no aux data for HDMI-DVI converter */
 887         HDMI_AUDIO_OFF,                 /* force turn off HDMI audio */
 888         HDMI_AUDIO_AUTO,                /* trust EDID */
 889         HDMI_AUDIO_ON,                  /* force turn on HDMI audio */
 890 };
 891
 892 enum i915_cache_level {
 893         I915_CACHE_NONE = 0,
 894         I915_CACHE_LLC,
 895         I915_CACHE_LLC_MLC, /* gen6+, in docs at least! */
 896 };
 897
 898 struct drm_i915_gem_object {
 899         struct drm_gem_object base;
 900
 901         /** Current space allocated to this object in the GTT, if any. */
 902         struct drm_mm_node *gtt_space;
 903         struct list_head gtt_list;
 904
 905         /** This object's place on the active/inactive lists */
 906         struct list_head ring_list;
 907         struct list_head mm_list;
 908         /** This object's place in the batchbuffer or on the eviction list */
 909         struct list_head exec_list;
 910
 911         /**
 912          * This is set if the object is on the active lists (has pending
 913          * rendering and so a non-zero seqno), and is not set if it i s on
 914          * inactive (ready to be unbound) list.
 915          */
 916         unsigned int active:1;
 917
 918         /**
 919          * This is set if the object has been written to since last bound
 920          * to the GTT
 921          */
 922         unsigned int dirty:1;
 923
 924         /**
 925          * Fence register bits (if any) for this object.  Will be set
 926          * as needed when mapped into the GTT.
 927          * Protected by dev->struct_mutex.
 928          */
 929         signed int fence_reg:I915_MAX_NUM_FENCE_BITS;
 930
 931         /**
 932          * Advice: are the backing pages purgeable?
 933          */
 934         unsigned int madv:2;
 935
 936         /**
 937          * Current tiling mode for the object.
 938          */
 939         unsigned int tiling_mode:2;
 940         /**
 941          * Whether the tiling parameters for the currently associated fence
 942          * register have changed. Note that for the purposes of tracking
 943          * tiling changes we also treat the unfenced register, the register
 944          * slot that the object occupies whilst it executes a fenced
 945          * command (such as BLT on gen2/3), as a "fence".
 946          */
 947         unsigned int fence_dirty:1;
 948
 949         /** How many users have pinned this object in GTT space. The following
 950          * users can each hold at most one reference: pwrite/pread, pin_ioctl
 951          * (via user_pin_count), execbuffer (objects are not allowed multiple
 952          * times for the same batchbuffer), and the framebuffer code. When
 953          * switching/pageflipping, the framebuffer code has at most two buffers
 954          * pinned per crtc.
 955          *
 956          * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
 957          * bits with absolutely no headroom. So use 4 bits. */
 958         unsigned int pin_count:4;
 959 #define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf
 960
 961         /**
 962          * Is the object at the current location in the gtt mappable and
 963          * fenceable? Used to avoid costly recalculations.
 964          */
 965         unsigned int map_and_fenceable:1;
 966
 967         /**
 968          * Whether the current gtt mapping needs to be mappable (and isn't just
 969          * mappable by accident). Track pin and fault separate for a more
 970          * accurate mappable working set.
 971          */
 972         unsigned int fault_mappable:1;
 973         unsigned int pin_mappable:1;
 974
 975         /*
 976          * Is the GPU currently using a fence to access this buffer,
 977          */
 978         unsigned int pending_fenced_gpu_access:1;
 979         unsigned int fenced_gpu_access:1;
 980
 981         unsigned int cache_level:2;
 982
 983         unsigned int has_aliasing_ppgtt_mapping:1;
 984         unsigned int has_global_gtt_mapping:1;
 985
 986         struct page **pages;
 987
 988         /**
 989          * DMAR support
 990          */
 991         struct scatterlist *sg_list;
 992         int num_sg;
 993
 994         /* prime dma-buf support */
 995         struct sg_table *sg_table;
 996         void *dma_buf_vmapping;
 997         int vmapping_count;
 998
 999         /**
1000          * Used for performing relocations during execbuffer insertion.
1001          */
1002         struct hlist_node exec_node;
1003         unsigned long exec_handle;
1004         struct drm_i915_gem_exec_object2 *exec_entry;
1005
1006         /**
1007          * Current offset of the object in GTT space.
1008          *
1009          * This is the same as gtt_space->start
1010          */
1011         uint32_t gtt_offset;
1012
1013         struct intel_ring_buffer *ring;
1014
1015         /** Breadcrumb of last rendering to the buffer. */
1016         uint32_t last_read_seqno;
1017         uint32_t last_write_seqno;
1018         /** Breadcrumb of last fenced GPU access to the buffer. */
1019         uint32_t last_fenced_seqno;
1020
1021         /** Current tiling stride for the object, if it's tiled. */
1022         uint32_t stride;
1023
1024         /** Record of address bit 17 of each page at last unbind. */
1025         unsigned long *bit_17;
1026
1027         /** User space pin count and filp owning the pin */
1028         uint32_t user_pin_count;
1029         struct drm_file *pin_filp;
1030
1031         /** for phy allocated objects */
1032         struct drm_i915_gem_phys_object *phys_obj;
1033
1034         /**
1035          * Number of crtcs where this object is currently the fb, but
1036          * will be page flipped away on the next vblank.  When it
1037          * reaches 0, dev_priv->pending_flip_queue will be woken up.
1038          */
1039         atomic_t pending_flip;
1040 };
1041
1042 #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base)
1043
1044 /**
1045  * Request queue structure.
1046  *
1047  * The request queue allows us to note sequence numbers that have been emitted
1048  * and may be associated with active buffers to be retired.
1049  *
1050  * By keeping this list, we can avoid having to do questionable
1051  * sequence-number comparisons on buffer last_rendering_seqnos, and associate
1052  * an emission time with seqnos for tracking how far ahead of the GPU we are.
1053  */
1054 struct drm_i915_gem_request {
1055         /** On Which ring this request was generated */
1056         struct intel_ring_buffer *ring;
1057
1058         /** GEM sequence number associated with this request. */
1059         uint32_t seqno;
1060
1061         /** Postion in the ringbuffer of the end of the request */
1062         u32 tail;
1063
1064         /** Time at which this request was emitted, in jiffies. */
1065         unsigned long emitted_jiffies;
1066
1067         /** global list entry for this request */
1068         struct list_head list;
1069
1070         struct drm_i915_file_private *file_priv;
1071         /** file_priv list entry for this request */
1072         struct list_head client_list;
1073 };
1074
1075 struct drm_i915_file_private {
1076         struct {
1077                 struct spinlock lock;
1078                 struct list_head request_list;
1079         } mm;
1080         struct idr context_idr;
1081 };
1082
1083 #define INTEL_INFO(dev) (((struct drm_i915_private *) (dev)->dev_private)->info)
1084
1085 #define IS_I830(dev)            ((dev)->pci_device == 0x3577)
1086 #define IS_845G(dev)            ((dev)->pci_device == 0x2562)
1087 #define IS_I85X(dev)            (INTEL_INFO(dev)->is_i85x)
1088 #define IS_I865G(dev)           ((dev)->pci_device == 0x2572)
1089 #define IS_I915G(dev)           (INTEL_INFO(dev)->is_i915g)
1090 #define IS_I915GM(dev)          ((dev)->pci_device == 0x2592)
1091 #define IS_I945G(dev)           ((dev)->pci_device == 0x2772)
1092 #define IS_I945GM(dev)          (INTEL_INFO(dev)->is_i945gm)
1093 #define IS_BROADWATER(dev)      (INTEL_INFO(dev)->is_broadwater)
1094 #define IS_CRESTLINE(dev)       (INTEL_INFO(dev)->is_crestline)
1095 #define IS_GM45(dev)            ((dev)->pci_device == 0x2A42)
1096 #define IS_G4X(dev)             (INTEL_INFO(dev)->is_g4x)
1097 #define IS_PINEVIEW_G(dev)      ((dev)->pci_device == 0xa001)
1098 #define IS_PINEVIEW_M(dev)      ((dev)->pci_device == 0xa011)
1099 #define IS_PINEVIEW(dev)        (INTEL_INFO(dev)->is_pineview)
1100 #define IS_G33(dev)             (INTEL_INFO(dev)->is_g33)
1101 #define IS_IRONLAKE_D(dev)      ((dev)->pci_device == 0x0042)
1102 #define IS_IRONLAKE_M(dev)      ((dev)->pci_device == 0x0046)
1103 #define IS_IVYBRIDGE(dev)       (INTEL_INFO(dev)->is_ivybridge)
1104 #define IS_VALLEYVIEW(dev)      (INTEL_INFO(dev)->is_valleyview)
1105 #define IS_HASWELL(dev) (INTEL_INFO(dev)->is_haswell)
1106 #define IS_MOBILE(dev)          (INTEL_INFO(dev)->is_mobile)
1107
1108 /*
1109  * The genX designation typically refers to the render engine, so render
1110  * capability related checks should use IS_GEN, while display and other checks
1111  * have their own (e.g. HAS_PCH_SPLIT for ILK+ display, IS_foo for particular
1112  * chips, etc.).
1113  */
1114 #define IS_GEN2(dev)    (INTEL_INFO(dev)->gen == 2)
1115 #define IS_GEN3(dev)    (INTEL_INFO(dev)->gen == 3)
1116 #define IS_GEN4(dev)    (INTEL_INFO(dev)->gen == 4)
1117 #define IS_GEN5(dev)    (INTEL_INFO(dev)->gen == 5)
1118 #define IS_GEN6(dev)    (INTEL_INFO(dev)->gen == 6)
1119 #define IS_GEN7(dev)    (INTEL_INFO(dev)->gen == 7)
1120
1121 #define HAS_BSD(dev)            (INTEL_INFO(dev)->has_bsd_ring)
1122 #define HAS_BLT(dev)            (INTEL_INFO(dev)->has_blt_ring)
1123 #define HAS_LLC(dev)            (INTEL_INFO(dev)->has_llc)
1124 #define I915_NEED_GFX_HWS(dev)  (INTEL_INFO(dev)->need_gfx_hws)
1125
1126 #define HAS_HW_CONTEXTS(dev)    (INTEL_INFO(dev)->gen >= 6)
1127 #define HAS_ALIASING_PPGTT(dev) (INTEL_INFO(dev)->gen >=6 && !IS_VALLEYVIEW(dev))
1128
1129 #define HAS_OVERLAY(dev)                (INTEL_INFO(dev)->has_overlay)
1130 #define OVERLAY_NEEDS_PHYSICAL(dev)     (INTEL_INFO(dev)->overlay_needs_physical)
1131
1132 /* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte
1133  * rows, which changed the alignment requirements and fence programming.
1134  */
1135 #define HAS_128_BYTE_Y_TILING(dev) (!IS_GEN2(dev) && !(IS_I915G(dev) || \
1136                                                       IS_I915GM(dev)))
1137 #define SUPPORTS_DIGITAL_OUTPUTS(dev)   (!IS_GEN2(dev) && !IS_PINEVIEW(dev))
1138 #define SUPPORTS_INTEGRATED_HDMI(dev)   (IS_G4X(dev) || IS_GEN5(dev))
1139 #define SUPPORTS_INTEGRATED_DP(dev)     (IS_G4X(dev) || IS_GEN5(dev))
1140 #define SUPPORTS_EDP(dev)               (IS_IRONLAKE_M(dev))
1141 #define SUPPORTS_TV(dev)                (INTEL_INFO(dev)->supports_tv)
1142 #define I915_HAS_HOTPLUG(dev)            (INTEL_INFO(dev)->has_hotplug)
1143 /* dsparb controlled by hw only */
1144 #define DSPARB_HWCONTROL(dev) (IS_G4X(dev) || IS_IRONLAKE(dev))
1145
1146 #define HAS_FW_BLC(dev) (INTEL_INFO(dev)->gen > 2)
1147 #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr)
1148 #define I915_HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc)
1149
1150 #define HAS_PIPE_CONTROL(dev) (INTEL_INFO(dev)->gen >= 5)
1151
1152 #define INTEL_PCH_TYPE(dev) (((struct drm_i915_private *)(dev)->dev_private)->pch_type)
1153 #define HAS_PCH_LPT(dev) (INTEL_PCH_TYPE(dev) == PCH_LPT)
1154 #define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT)
1155 #define HAS_PCH_IBX(dev) (INTEL_PCH_TYPE(dev) == PCH_IBX)
1156 #define HAS_PCH_SPLIT(dev) (INTEL_PCH_TYPE(dev) != PCH_NONE)
1157
1158 #define HAS_FORCE_WAKE(dev) (INTEL_INFO(dev)->has_force_wake)
1159
1160 #define HAS_L3_GPU_CACHE(dev) (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
1161
1162 #include "i915_trace.h"
1163
1164 /**
1165  * RC6 is a special power stage which allows the GPU to enter an very
1166  * low-voltage mode when idle, using down to 0V while at this stage.  This
1167  * stage is entered automatically when the GPU is idle when RC6 support is
1168  * enabled, and as soon as new workload arises GPU wakes up automatically as well.
1169  *
1170  * There are different RC6 modes available in Intel GPU, which differentiate
1171  * among each other with the latency required to enter and leave RC6 and
1172  * voltage consumed by the GPU in different states.
1173  *
1174  * The combination of the following flags define which states GPU is allowed
1175  * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
1176  * RC6pp is deepest RC6. Their support by hardware varies according to the
1177  * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
1178  * which brings the most power savings; deeper states save more power, but
1179  * require higher latency to switch to and wake up.
1180  */
1181 #define INTEL_RC6_ENABLE                        (1<<0)
1182 #define INTEL_RC6p_ENABLE                       (1<<1)
1183 #define INTEL_RC6pp_ENABLE                      (1<<2)
1184
1185 extern struct drm_ioctl_desc i915_ioctls[];
1186 extern int i915_max_ioctl;
1187 extern unsigned int i915_fbpercrtc __always_unused;
1188 extern int i915_panel_ignore_lid __read_mostly;
1189 extern unsigned int i915_powersave __read_mostly;
1190 extern int i915_semaphores __read_mostly;
1191 extern unsigned int i915_lvds_downclock __read_mostly;
1192 extern int i915_lvds_channel_mode __read_mostly;
1193 extern int i915_panel_use_ssc __read_mostly;
1194 extern int i915_vbt_sdvo_panel_type __read_mostly;
1195 extern int i915_enable_rc6 __read_mostly;
1196 extern int i915_enable_fbc __read_mostly;
1197 extern bool i915_enable_hangcheck __read_mostly;
1198 extern int i915_enable_ppgtt __read_mostly;
1199
1200 extern int i915_suspend(struct drm_device *dev, pm_message_t state);
1201 extern int i915_resume(struct drm_device *dev);
1202 extern int i915_master_create(struct drm_device *dev, struct drm_master *master);
1203 extern void i915_master_destroy(struct drm_device *dev, struct drm_master *master);
1204
1205                                 /* i915_dma.c */
1206 void i915_update_dri1_breadcrumb(struct drm_device *dev);
1207 extern void i915_kernel_lost_context(struct drm_device * dev);
1208 extern int i915_driver_load(struct drm_device *, unsigned long flags);
1209 extern int i915_driver_unload(struct drm_device *);
1210 extern int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv);
1211 extern void i915_driver_lastclose(struct drm_device * dev);
1212 extern void i915_driver_preclose(struct drm_device *dev,
1213                                  struct drm_file *file_priv);
1214 extern void i915_driver_postclose(struct drm_device *dev,
1215                                   struct drm_file *file_priv);
1216 extern int i915_driver_device_is_agp(struct drm_device * dev);
1217 #ifdef CONFIG_COMPAT
1218 extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
1219                               unsigned long arg);
1220 #endif
1221 extern int i915_emit_box(struct drm_device *dev,
1222                          struct drm_clip_rect *box,
1223                          int DR1, int DR4);
1224 extern int intel_gpu_reset(struct drm_device *dev);
1225 extern int i915_reset(struct drm_device *dev);
1226 extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
1227 extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
1228 extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
1229 extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
1230
1231
1232 /* i915_irq.c */
1233 void i915_hangcheck_elapsed(unsigned long data);
1234 void i915_handle_error(struct drm_device *dev, bool wedged);
1235
1236 extern void intel_irq_init(struct drm_device *dev);
1237 extern void intel_gt_init(struct drm_device *dev);
1238
1239 void i915_error_state_free(struct kref *error_ref);
1240
1241 void
1242 i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
1243
1244 void
1245 i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
1246
1247 void intel_enable_asle(struct drm_device *dev);
1248
1249 #ifdef CONFIG_DEBUG_FS
1250 extern void i915_destroy_error_state(struct drm_device *dev);
1251 #else
1252 #define i915_destroy_error_state(x)
1253 #endif
1254
1255
1256 /* i915_gem.c */
1257 int i915_gem_init_ioctl(struct drm_device *dev, void *data,
1258                         struct drm_file *file_priv);
1259 int i915_gem_create_ioctl(struct drm_device *dev, void *data,
1260                           struct drm_file *file_priv);
1261 int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
1262                          struct drm_file *file_priv);
1263 int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
1264                           struct drm_file *file_priv);
1265 int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
1266                         struct drm_file *file_priv);
1267 int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
1268                         struct drm_file *file_priv);
1269 int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
1270                               struct drm_file *file_priv);
1271 int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
1272                              struct drm_file *file_priv);
1273 int i915_gem_execbuffer(struct drm_device *dev, void *data,
1274                         struct drm_file *file_priv);
1275 int i915_gem_execbuffer2(struct drm_device *dev, void *data,
1276                          struct drm_file *file_priv);
1277 int i915_gem_pin_ioctl(struct drm_device *dev, void *data,
1278                        struct drm_file *file_priv);
1279 int i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
1280                          struct drm_file *file_priv);
1281 int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
1282                         struct drm_file *file_priv);
1283 int i915_gem_get_cacheing_ioctl(struct drm_device *dev, void *data,
1284                                 struct drm_file *file);
1285 int i915_gem_set_cacheing_ioctl(struct drm_device *dev, void *data,
1286                                 struct drm_file *file);
1287 int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
1288                             struct drm_file *file_priv);
1289 int i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
1290                            struct drm_file *file_priv);
1291 int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
1292                            struct drm_file *file_priv);
1293 int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
1294                            struct drm_file *file_priv);
1295 int i915_gem_set_tiling(struct drm_device *dev, void *data,
1296                         struct drm_file *file_priv);
1297 int i915_gem_get_tiling(struct drm_device *dev, void *data,
1298                         struct drm_file *file_priv);
1299 int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
1300                                 struct drm_file *file_priv);
1301 int i915_gem_wait_ioctl(struct drm_device *dev, void *data,
1302                         struct drm_file *file_priv);
1303 void i915_gem_load(struct drm_device *dev);
1304 int i915_gem_init_object(struct drm_gem_object *obj);
1305 void i915_gem_object_init(struct drm_i915_gem_object *obj);
1306 struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
1307                                                   size_t size);
1308 void i915_gem_free_object(struct drm_gem_object *obj);
1309 int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj,
1310                                      uint32_t alignment,
1311                                      bool map_and_fenceable,
1312                                      bool nonblocking);
1313 void i915_gem_object_unpin(struct drm_i915_gem_object *obj);
1314 int __must_check i915_gem_object_unbind(struct drm_i915_gem_object *obj);
1315 void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
1316 void i915_gem_lastclose(struct drm_device *dev);
1317
1318 int __must_check i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj);
1319 int __must_check i915_mutex_lock_interruptible(struct drm_device *dev);
1320 int i915_gem_object_sync(struct drm_i915_gem_object *obj,
1321                          struct intel_ring_buffer *to);
1322 void i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
1323                                     struct intel_ring_buffer *ring,
1324                                     u32 seqno);
1325
1326 int i915_gem_dumb_create(struct drm_file *file_priv,
1327                          struct drm_device *dev,
1328                          struct drm_mode_create_dumb *args);
1329 int i915_gem_mmap_gtt(struct drm_file *file_priv, struct drm_device *dev,
1330                       uint32_t handle, uint64_t *offset);
1331 int i915_gem_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
1332                           uint32_t handle);
1333 /**
1334  * Returns true if seq1 is later than seq2.
1335  */
1336 static inline bool
1337 i915_seqno_passed(uint32_t seq1, uint32_t seq2)
1338 {
1339         return (int32_t)(seq1 - seq2) >= 0;
1340 }
1341
1342 u32 i915_gem_next_request_seqno(struct intel_ring_buffer *ring);
1343
1344 int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
1345 int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
1346
1347 static inline bool
1348 i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
1349 {
1350         if (obj->fence_reg != I915_FENCE_REG_NONE) {
1351                 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
1352                 dev_priv->fence_regs[obj->fence_reg].pin_count++;
1353                 return true;
1354         } else
1355                 return false;
1356 }
1357
1358 static inline void
1359 i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
1360 {
1361         if (obj->fence_reg != I915_FENCE_REG_NONE) {
1362                 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
1363                 dev_priv->fence_regs[obj->fence_reg].pin_count--;
1364         }
1365 }
1366
1367 void i915_gem_retire_requests(struct drm_device *dev);
1368 void i915_gem_retire_requests_ring(struct intel_ring_buffer *ring);
1369 int __must_check i915_gem_check_wedge(struct drm_i915_private *dev_priv,
1370                                       bool interruptible);
1371
1372 void i915_gem_reset(struct drm_device *dev);
1373 void i915_gem_clflush_object(struct drm_i915_gem_object *obj);
1374 int __must_check i915_gem_object_set_domain(struct drm_i915_gem_object *obj,
1375                                             uint32_t read_domains,
1376                                             uint32_t write_domain);
1377 int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj);
1378 int __must_check i915_gem_init(struct drm_device *dev);
1379 int __must_check i915_gem_init_hw(struct drm_device *dev);
1380 void i915_gem_l3_remap(struct drm_device *dev);
1381 void i915_gem_init_swizzling(struct drm_device *dev);
1382 void i915_gem_init_ppgtt(struct drm_device *dev);
1383 void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
1384 int __must_check i915_gpu_idle(struct drm_device *dev);
1385 int __must_check i915_gem_idle(struct drm_device *dev);
1386 int i915_add_request(struct intel_ring_buffer *ring,
1387                      struct drm_file *file,
1388                      struct drm_i915_gem_request *request);
1389 int __must_check i915_wait_seqno(struct intel_ring_buffer *ring,
1390                                  uint32_t seqno);
1391 int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
1392 int __must_check
1393 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj,
1394                                   bool write);
1395 int __must_check
1396 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write);
1397 int __must_check
1398 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
1399                                      u32 alignment,
1400                                      struct intel_ring_buffer *pipelined);
1401 int i915_gem_attach_phys_object(struct drm_device *dev,
1402                                 struct drm_i915_gem_object *obj,
1403                                 int id,
1404                                 int align);
1405 void i915_gem_detach_phys_object(struct drm_device *dev,
1406                                  struct drm_i915_gem_object *obj);
1407 void i915_gem_free_all_phys_object(struct drm_device *dev);
1408 void i915_gem_release(struct drm_device *dev, struct drm_file *file);
1409
1410 uint32_t
1411 i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev,
1412                                     uint32_t size,
1413                                     int tiling_mode);
1414
1415 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
1416                                     enum i915_cache_level cache_level);
1417
1418 struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
1419                                 struct dma_buf *dma_buf);
1420
1421 struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
1422                                 struct drm_gem_object *gem_obj, int flags);
1423
1424 /* i915_gem_context.c */
1425 void i915_gem_context_init(struct drm_device *dev);
1426 void i915_gem_context_fini(struct drm_device *dev);
1427 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
1428 int i915_switch_context(struct intel_ring_buffer *ring,
1429                         struct drm_file *file, int to_id);
1430 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
1431                                   struct drm_file *file);
1432 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
1433                                    struct drm_file *file);
1434
1435 /* i915_gem_gtt.c */
1436 int __must_check i915_gem_init_aliasing_ppgtt(struct drm_device *dev);
1437 void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev);
1438 void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,
1439                             struct drm_i915_gem_object *obj,
1440                             enum i915_cache_level cache_level);
1441 void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
1442                               struct drm_i915_gem_object *obj);
1443
1444 void i915_gem_restore_gtt_mappings(struct drm_device *dev);
1445 int __must_check i915_gem_gtt_prepare_object(struct drm_i915_gem_object *obj);
1446 void i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj,
1447                                 enum i915_cache_level cache_level);
1448 void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj);
1449 void i915_gem_gtt_finish_object(struct drm_i915_gem_object *obj);
1450 void i915_gem_init_global_gtt(struct drm_device *dev,
1451                               unsigned long start,
1452                               unsigned long mappable_end,
1453                               unsigned long end);
1454
1455 /* i915_gem_evict.c */
1456 int __must_check i915_gem_evict_something(struct drm_device *dev, int min_size,
1457                                           unsigned alignment,
1458                                           unsigned cache_level,
1459                                           bool mappable,
1460                                           bool nonblock);
1461 int i915_gem_evict_everything(struct drm_device *dev);
1462
1463 /* i915_gem_stolen.c */
1464 int i915_gem_init_stolen(struct drm_device *dev);
1465 void i915_gem_cleanup_stolen(struct drm_device *dev);
1466
1467 /* i915_gem_tiling.c */
1468 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
1469 void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj);
1470 void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj);
1471
1472 /* i915_gem_debug.c */
1473 void i915_gem_dump_object(struct drm_i915_gem_object *obj, int len,
1474                           const char *where, uint32_t mark);
1475 #if WATCH_LISTS
1476 int i915_verify_lists(struct drm_device *dev);
1477 #else
1478 #define i915_verify_lists(dev) 0
1479 #endif
1480 void i915_gem_object_check_coherency(struct drm_i915_gem_object *obj,
1481                                      int handle);
1482 void i915_gem_dump_object(struct drm_i915_gem_object *obj, int len,
1483                           const char *where, uint32_t mark);
1484
1485 /* i915_debugfs.c */
1486 int i915_debugfs_init(struct drm_minor *minor);
1487 void i915_debugfs_cleanup(struct drm_minor *minor);
1488
1489 /* i915_suspend.c */
1490 extern int i915_save_state(struct drm_device *dev);
1491 extern int i915_restore_state(struct drm_device *dev);
1492
1493 /* i915_suspend.c */
1494 extern int i915_save_state(struct drm_device *dev);
1495 extern int i915_restore_state(struct drm_device *dev);
1496
1497 /* i915_sysfs.c */
1498 void i915_setup_sysfs(struct drm_device *dev_priv);
1499 void i915_teardown_sysfs(struct drm_device *dev_priv);
1500
1501 /* intel_i2c.c */
1502 extern int intel_setup_gmbus(struct drm_device *dev);
1503 extern void intel_teardown_gmbus(struct drm_device *dev);
1504 extern inline bool intel_gmbus_is_port_valid(unsigned port)
1505 {
1506         return (port >= GMBUS_PORT_SSC && port <= GMBUS_PORT_DPD);
1507 }
1508
1509 extern struct i2c_adapter *intel_gmbus_get_adapter(
1510                 struct drm_i915_private *dev_priv, unsigned port);
1511 extern void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
1512 extern void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
1513 extern inline bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter)
1514 {
1515         return container_of(adapter, struct intel_gmbus, adapter)->force_bit;
1516 }
1517 extern void intel_i2c_reset(struct drm_device *dev);
1518
1519 /* intel_opregion.c */
1520 extern int intel_opregion_setup(struct drm_device *dev);
1521 #ifdef CONFIG_ACPI
1522 extern void intel_opregion_init(struct drm_device *dev);
1523 extern void intel_opregion_fini(struct drm_device *dev);
1524 extern void intel_opregion_asle_intr(struct drm_device *dev);
1525 extern void intel_opregion_gse_intr(struct drm_device *dev);
1526 extern void intel_opregion_enable_asle(struct drm_device *dev);
1527 #else
1528 static inline void intel_opregion_init(struct drm_device *dev) { return; }
1529 static inline void intel_opregion_fini(struct drm_device *dev) { return; }
1530 static inline void intel_opregion_asle_intr(struct drm_device *dev) { return; }
1531 static inline void intel_opregion_gse_intr(struct drm_device *dev) { return; }
1532 static inline void intel_opregion_enable_asle(struct drm_device *dev) { return; }
1533 #endif
1534
1535 /* intel_acpi.c */
1536 #ifdef CONFIG_ACPI
1537 extern void intel_register_dsm_handler(void);
1538 extern void intel_unregister_dsm_handler(void);
1539 #else
1540 static inline void intel_register_dsm_handler(void) { return; }
1541 static inline void intel_unregister_dsm_handler(void) { return; }
1542 #endif /* CONFIG_ACPI */
1543
1544 /* modesetting */
1545 extern void intel_modeset_init_hw(struct drm_device *dev);
1546 extern void intel_modeset_init(struct drm_device *dev);
1547 extern void intel_modeset_gem_init(struct drm_device *dev);
1548 extern void intel_modeset_cleanup(struct drm_device *dev);
1549 extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
1550 extern bool intel_fbc_enabled(struct drm_device *dev);
1551 extern void intel_disable_fbc(struct drm_device *dev);
1552 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
1553 extern void ironlake_init_pch_refclk(struct drm_device *dev);
1554 extern void gen6_set_rps(struct drm_device *dev, u8 val);
1555 extern void intel_detect_pch(struct drm_device *dev);
1556 extern int intel_trans_dp_port_sel(struct drm_crtc *crtc);
1557 extern int intel_enable_rc6(const struct drm_device *dev);
1558
1559 extern bool i915_semaphore_is_enabled(struct drm_device *dev);
1560 int i915_reg_read_ioctl(struct drm_device *dev, void *data,
1561                         struct drm_file *file);
1562
1563 /* overlay */
1564 #ifdef CONFIG_DEBUG_FS
1565 extern struct intel_overlay_error_state *intel_overlay_capture_error_state(struct drm_device *dev);
1566 extern void intel_overlay_print_error_state(struct seq_file *m, struct intel_overlay_error_state *error);
1567
1568 extern struct intel_display_error_state *intel_display_capture_error_state(struct drm_device *dev);
1569 extern void intel_display_print_error_state(struct seq_file *m,
1570                                             struct drm_device *dev,
1571                                             struct intel_display_error_state *error);
1572 #endif
1573
1574 /* On SNB platform, before reading ring registers forcewake bit
1575  * must be set to prevent GT core from power down and stale values being
1576  * returned.
1577  */
1578 void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
1579 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
1580 int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv);
1581
1582 #define __i915_read(x, y) \
1583         u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg);
1584
1585 __i915_read(8, b)
1586 __i915_read(16, w)
1587 __i915_read(32, l)
1588 __i915_read(64, q)
1589 #undef __i915_read
1590
1591 #define __i915_write(x, y) \
1592         void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val);
1593
1594 __i915_write(8, b)
1595 __i915_write(16, w)
1596 __i915_write(32, l)
1597 __i915_write(64, q)
1598 #undef __i915_write
1599
1600 #define I915_READ8(reg)         i915_read8(dev_priv, (reg))
1601 #define I915_WRITE8(reg, val)   i915_write8(dev_priv, (reg), (val))
1602
1603 #define I915_READ16(reg)        i915_read16(dev_priv, (reg))
1604 #define I915_WRITE16(reg, val)  i915_write16(dev_priv, (reg), (val))
1605 #define I915_READ16_NOTRACE(reg)        readw(dev_priv->regs + (reg))
1606 #define I915_WRITE16_NOTRACE(reg, val)  writew(val, dev_priv->regs + (reg))
1607
1608 #define I915_READ(reg)          i915_read32(dev_priv, (reg))
1609 #define I915_WRITE(reg, val)    i915_write32(dev_priv, (reg), (val))
1610 #define I915_READ_NOTRACE(reg)          readl(dev_priv->regs + (reg))
1611 #define I915_WRITE_NOTRACE(reg, val)    writel(val, dev_priv->regs + (reg))
1612
1613 #define I915_WRITE64(reg, val)  i915_write64(dev_priv, (reg), (val))
1614 #define I915_READ64(reg)        i915_read64(dev_priv, (reg))
1615
1616 #define POSTING_READ(reg)       (void)I915_READ_NOTRACE(reg)
1617 #define POSTING_READ16(reg)     (void)I915_READ16_NOTRACE(reg)
1618
1619
1620 #endif