1 /* i915_drv.h -- Private header for the I915 driver -*- linux-c -*-
5 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
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.
33 #include <uapi/drm/i915_drm.h>
36 #include "intel_bios.h"
37 #include "intel_ringbuffer.h"
38 #include "i915_gem_gtt.h"
39 #include <linux/io-mapping.h>
40 #include <linux/i2c.h>
41 #include <linux/i2c-algo-bit.h>
42 #include <drm/intel-gtt.h>
43 #include <linux/backlight.h>
44 #include <linux/hashtable.h>
45 #include <linux/intel-iommu.h>
46 #include <linux/kref.h>
47 #include <linux/pm_qos.h>
49 /* General customization:
52 #define DRIVER_AUTHOR "Tungsten Graphics, Inc."
54 #define DRIVER_NAME "i915"
55 #define DRIVER_DESC "Intel Graphics"
56 #define DRIVER_DATE "20140620"
64 I915_MAX_PIPES = _PIPE_EDP
66 #define pipe_name(p) ((p) + 'A')
75 #define transcoder_name(t) ((t) + 'A')
82 #define plane_name(p) ((p) + 'A')
84 #define sprite_name(p, s) ((p) * INTEL_INFO(dev)->num_sprites[(p)] + (s) + 'A')
94 #define port_name(p) ((p) + 'A')
96 #define I915_NUM_PHYS_VLV 2
108 enum intel_display_power_domain {
112 POWER_DOMAIN_PIPE_A_PANEL_FITTER,
113 POWER_DOMAIN_PIPE_B_PANEL_FITTER,
114 POWER_DOMAIN_PIPE_C_PANEL_FITTER,
115 POWER_DOMAIN_TRANSCODER_A,
116 POWER_DOMAIN_TRANSCODER_B,
117 POWER_DOMAIN_TRANSCODER_C,
118 POWER_DOMAIN_TRANSCODER_EDP,
119 POWER_DOMAIN_PORT_DDI_A_2_LANES,
120 POWER_DOMAIN_PORT_DDI_A_4_LANES,
121 POWER_DOMAIN_PORT_DDI_B_2_LANES,
122 POWER_DOMAIN_PORT_DDI_B_4_LANES,
123 POWER_DOMAIN_PORT_DDI_C_2_LANES,
124 POWER_DOMAIN_PORT_DDI_C_4_LANES,
125 POWER_DOMAIN_PORT_DDI_D_2_LANES,
126 POWER_DOMAIN_PORT_DDI_D_4_LANES,
127 POWER_DOMAIN_PORT_DSI,
128 POWER_DOMAIN_PORT_CRT,
129 POWER_DOMAIN_PORT_OTHER,
138 #define POWER_DOMAIN_PIPE(pipe) ((pipe) + POWER_DOMAIN_PIPE_A)
139 #define POWER_DOMAIN_PIPE_PANEL_FITTER(pipe) \
140 ((pipe) + POWER_DOMAIN_PIPE_A_PANEL_FITTER)
141 #define POWER_DOMAIN_TRANSCODER(tran) \
142 ((tran) == TRANSCODER_EDP ? POWER_DOMAIN_TRANSCODER_EDP : \
143 (tran) + POWER_DOMAIN_TRANSCODER_A)
147 HPD_PORT_A = HPD_NONE, /* PORT_A is internal */
148 HPD_TV = HPD_NONE, /* TV is known to be unreliable */
158 #define I915_GEM_GPU_DOMAINS \
159 (I915_GEM_DOMAIN_RENDER | \
160 I915_GEM_DOMAIN_SAMPLER | \
161 I915_GEM_DOMAIN_COMMAND | \
162 I915_GEM_DOMAIN_INSTRUCTION | \
163 I915_GEM_DOMAIN_VERTEX)
165 #define for_each_pipe(p) for ((p) = 0; (p) < INTEL_INFO(dev)->num_pipes; (p)++)
166 #define for_each_sprite(p, s) for ((s) = 0; (s) < INTEL_INFO(dev)->num_sprites[(p)]; (s)++)
168 #define for_each_crtc(dev, crtc) \
169 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
171 #define for_each_intel_crtc(dev, intel_crtc) \
172 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head)
174 #define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
175 list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
176 if ((intel_encoder)->base.crtc == (__crtc))
178 #define for_each_connector_on_encoder(dev, __encoder, intel_connector) \
179 list_for_each_entry((intel_connector), &(dev)->mode_config.connector_list, base.head) \
180 if ((intel_connector)->base.encoder == (__encoder))
182 #define for_each_power_domain(domain, mask) \
183 for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++) \
184 if ((1 << (domain)) & (mask))
186 struct drm_i915_private;
187 struct i915_mmu_object;
190 DPLL_ID_PRIVATE = -1, /* non-shared dpll in use */
191 /* real shared dpll ids must be >= 0 */
192 DPLL_ID_PCH_PLL_A = 0,
193 DPLL_ID_PCH_PLL_B = 1,
197 #define I915_NUM_PLLS 2
199 struct intel_dpll_hw_state {
207 struct intel_shared_dpll {
208 int refcount; /* count of number of CRTCs sharing this PLL */
209 int active; /* count of number of active CRTCs (i.e. DPMS on) */
210 bool on; /* is the PLL actually active? Disabled during modeset */
212 /* should match the index in the dev_priv->shared_dplls array */
213 enum intel_dpll_id id;
214 struct intel_dpll_hw_state hw_state;
215 /* The mode_set hook is optional and should be used together with the
216 * intel_prepare_shared_dpll function. */
217 void (*mode_set)(struct drm_i915_private *dev_priv,
218 struct intel_shared_dpll *pll);
219 void (*enable)(struct drm_i915_private *dev_priv,
220 struct intel_shared_dpll *pll);
221 void (*disable)(struct drm_i915_private *dev_priv,
222 struct intel_shared_dpll *pll);
223 bool (*get_hw_state)(struct drm_i915_private *dev_priv,
224 struct intel_shared_dpll *pll,
225 struct intel_dpll_hw_state *hw_state);
228 /* Used by dp and fdi links */
229 struct intel_link_m_n {
237 void intel_link_compute_m_n(int bpp, int nlanes,
238 int pixel_clock, int link_clock,
239 struct intel_link_m_n *m_n);
241 /* Interface history:
244 * 1.2: Add Power Management
245 * 1.3: Add vblank support
246 * 1.4: Fix cmdbuffer path, add heap destroy
247 * 1.5: Add vblank pipe configuration
248 * 1.6: - New ioctl for scheduling buffer swaps on vertical blank
249 * - Support vertical blank on secondary display pipe
251 #define DRIVER_MAJOR 1
252 #define DRIVER_MINOR 6
253 #define DRIVER_PATCHLEVEL 0
255 #define WATCH_LISTS 0
258 struct opregion_header;
259 struct opregion_acpi;
260 struct opregion_swsci;
261 struct opregion_asle;
263 struct intel_opregion {
264 struct opregion_header __iomem *header;
265 struct opregion_acpi __iomem *acpi;
266 struct opregion_swsci __iomem *swsci;
267 u32 swsci_gbda_sub_functions;
268 u32 swsci_sbcb_sub_functions;
269 struct opregion_asle __iomem *asle;
271 u32 __iomem *lid_state;
272 struct work_struct asle_work;
274 #define OPREGION_SIZE (8*1024)
276 struct intel_overlay;
277 struct intel_overlay_error_state;
279 struct drm_i915_master_private {
280 drm_local_map_t *sarea;
281 struct _drm_i915_sarea *sarea_priv;
283 #define I915_FENCE_REG_NONE -1
284 #define I915_MAX_NUM_FENCES 32
285 /* 32 fences + sign bit for FENCE_REG_NONE */
286 #define I915_MAX_NUM_FENCE_BITS 6
288 struct drm_i915_fence_reg {
289 struct list_head lru_list;
290 struct drm_i915_gem_object *obj;
294 struct sdvo_device_mapping {
303 struct intel_display_error_state;
305 struct drm_i915_error_state {
313 /* Generic register state */
320 u32 error; /* gen6+ */
321 u32 err_int; /* gen7 */
327 u32 extra_instdone[I915_NUM_INSTDONE_REG];
328 u64 fence[I915_MAX_NUM_FENCES];
329 struct intel_overlay_error_state *overlay;
330 struct intel_display_error_state *display;
331 struct drm_i915_error_object *semaphore_obj;
333 struct drm_i915_error_ring {
335 /* Software tracked state */
338 enum intel_ring_hangcheck_action hangcheck_action;
341 /* our own tracking of ring head and tail */
345 u32 semaphore_seqno[I915_NUM_RINGS - 1];
363 u32 rc_psmi; /* sleep state */
364 u32 semaphore_mboxes[I915_NUM_RINGS - 1];
366 struct drm_i915_error_object {
370 } *ringbuffer, *batchbuffer, *wa_batchbuffer, *ctx, *hws_page;
372 struct drm_i915_error_request {
387 char comm[TASK_COMM_LEN];
388 } ring[I915_NUM_RINGS];
389 struct drm_i915_error_buffer {
396 s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
404 } **active_bo, **pinned_bo;
406 u32 *active_bo_count, *pinned_bo_count;
409 struct intel_connector;
410 struct intel_crtc_config;
411 struct intel_plane_config;
416 struct drm_i915_display_funcs {
417 bool (*fbc_enabled)(struct drm_device *dev);
418 void (*enable_fbc)(struct drm_crtc *crtc);
419 void (*disable_fbc)(struct drm_device *dev);
420 int (*get_display_clock_speed)(struct drm_device *dev);
421 int (*get_fifo_size)(struct drm_device *dev, int plane);
423 * find_dpll() - Find the best values for the PLL
424 * @limit: limits for the PLL
425 * @crtc: current CRTC
426 * @target: target frequency in kHz
427 * @refclk: reference clock frequency in kHz
428 * @match_clock: if provided, @best_clock P divider must
429 * match the P divider from @match_clock
430 * used for LVDS downclocking
431 * @best_clock: best PLL values found
433 * Returns true on success, false on failure.
435 bool (*find_dpll)(const struct intel_limit *limit,
436 struct drm_crtc *crtc,
437 int target, int refclk,
438 struct dpll *match_clock,
439 struct dpll *best_clock);
440 void (*update_wm)(struct drm_crtc *crtc);
441 void (*update_sprite_wm)(struct drm_plane *plane,
442 struct drm_crtc *crtc,
443 uint32_t sprite_width, uint32_t sprite_height,
444 int pixel_size, bool enable, bool scaled);
445 void (*modeset_global_resources)(struct drm_device *dev);
446 /* Returns the active state of the crtc, and if the crtc is active,
447 * fills out the pipe-config with the hw state. */
448 bool (*get_pipe_config)(struct intel_crtc *,
449 struct intel_crtc_config *);
450 void (*get_plane_config)(struct intel_crtc *,
451 struct intel_plane_config *);
452 int (*crtc_mode_set)(struct drm_crtc *crtc,
454 struct drm_framebuffer *old_fb);
455 void (*crtc_enable)(struct drm_crtc *crtc);
456 void (*crtc_disable)(struct drm_crtc *crtc);
457 void (*off)(struct drm_crtc *crtc);
458 void (*write_eld)(struct drm_connector *connector,
459 struct drm_crtc *crtc,
460 struct drm_display_mode *mode);
461 void (*fdi_link_train)(struct drm_crtc *crtc);
462 void (*init_clock_gating)(struct drm_device *dev);
463 int (*queue_flip)(struct drm_device *dev, struct drm_crtc *crtc,
464 struct drm_framebuffer *fb,
465 struct drm_i915_gem_object *obj,
466 struct intel_engine_cs *ring,
468 void (*update_primary_plane)(struct drm_crtc *crtc,
469 struct drm_framebuffer *fb,
471 void (*hpd_irq_setup)(struct drm_device *dev);
472 /* clock updates for mode set */
474 /* render clock increase/decrease */
475 /* display clock increase/decrease */
476 /* pll clock increase/decrease */
478 int (*setup_backlight)(struct intel_connector *connector);
479 uint32_t (*get_backlight)(struct intel_connector *connector);
480 void (*set_backlight)(struct intel_connector *connector,
482 void (*disable_backlight)(struct intel_connector *connector);
483 void (*enable_backlight)(struct intel_connector *connector);
486 struct intel_uncore_funcs {
487 void (*force_wake_get)(struct drm_i915_private *dev_priv,
489 void (*force_wake_put)(struct drm_i915_private *dev_priv,
492 uint8_t (*mmio_readb)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
493 uint16_t (*mmio_readw)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
494 uint32_t (*mmio_readl)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
495 uint64_t (*mmio_readq)(struct drm_i915_private *dev_priv, off_t offset, bool trace);
497 void (*mmio_writeb)(struct drm_i915_private *dev_priv, off_t offset,
498 uint8_t val, bool trace);
499 void (*mmio_writew)(struct drm_i915_private *dev_priv, off_t offset,
500 uint16_t val, bool trace);
501 void (*mmio_writel)(struct drm_i915_private *dev_priv, off_t offset,
502 uint32_t val, bool trace);
503 void (*mmio_writeq)(struct drm_i915_private *dev_priv, off_t offset,
504 uint64_t val, bool trace);
507 struct intel_uncore {
508 spinlock_t lock; /** lock is also taken in irq contexts. */
510 struct intel_uncore_funcs funcs;
513 unsigned forcewake_count;
515 unsigned fw_rendercount;
516 unsigned fw_mediacount;
518 struct timer_list force_wake_timer;
521 #define DEV_INFO_FOR_EACH_FLAG(func, sep) \
522 func(is_mobile) sep \
525 func(is_i945gm) sep \
527 func(need_gfx_hws) sep \
529 func(is_pineview) sep \
530 func(is_broadwater) sep \
531 func(is_crestline) sep \
532 func(is_ivybridge) sep \
533 func(is_valleyview) sep \
534 func(is_haswell) sep \
535 func(is_preliminary) sep \
537 func(has_pipe_cxsr) sep \
538 func(has_hotplug) sep \
539 func(cursor_needs_physical) sep \
540 func(has_overlay) sep \
541 func(overlay_needs_physical) sep \
542 func(supports_tv) sep \
547 #define DEFINE_FLAG(name) u8 name:1
548 #define SEP_SEMICOLON ;
550 struct intel_device_info {
551 u32 display_mmio_offset;
553 u8 num_sprites[I915_MAX_PIPES];
555 u8 ring_mask; /* Rings supported by the HW */
556 DEV_INFO_FOR_EACH_FLAG(DEFINE_FLAG, SEP_SEMICOLON);
557 /* Register offsets for the various display pipes and transcoders */
558 int pipe_offsets[I915_MAX_TRANSCODERS];
559 int trans_offsets[I915_MAX_TRANSCODERS];
560 int palette_offsets[I915_MAX_PIPES];
561 int cursor_offsets[I915_MAX_PIPES];
567 enum i915_cache_level {
569 I915_CACHE_LLC, /* also used for snoopable memory on non-LLC */
570 I915_CACHE_L3_LLC, /* gen7+, L3 sits between the domain specifc
571 caches, eg sampler/render caches, and the
572 large Last-Level-Cache. LLC is coherent with
573 the CPU, but L3 is only visible to the GPU. */
574 I915_CACHE_WT, /* hsw:gt3e WriteThrough for scanouts */
577 struct i915_ctx_hang_stats {
578 /* This context had batch pending when hang was declared */
579 unsigned batch_pending;
581 /* This context had batch active when hang was declared */
582 unsigned batch_active;
584 /* Time when this context was last blamed for a GPU reset */
585 unsigned long guilty_ts;
587 /* This context is banned to submit more work */
591 /* This must match up with the value previously used for execbuf2.rsvd1. */
592 #define DEFAULT_CONTEXT_HANDLE 0
594 * struct intel_context - as the name implies, represents a context.
595 * @ref: reference count.
596 * @user_handle: userspace tracking identity for this context.
597 * @remap_slice: l3 row remapping information.
598 * @file_priv: filp associated with this context (NULL for global default
600 * @hang_stats: information about the role of this context in possible GPU
602 * @vm: virtual memory space used by this context.
603 * @legacy_hw_ctx: render context backing object and whether it is correctly
604 * initialized (legacy ring submission mechanism only).
605 * @link: link in the global list of contexts.
607 * Contexts are memory images used by the hardware to store copies of their
610 struct intel_context {
614 struct drm_i915_file_private *file_priv;
615 struct i915_ctx_hang_stats hang_stats;
616 struct i915_address_space *vm;
619 struct drm_i915_gem_object *rcs_state;
623 struct list_head link;
633 struct drm_mm_node compressed_fb;
634 struct drm_mm_node *compressed_llb;
636 struct intel_fbc_work {
637 struct delayed_work work;
638 struct drm_crtc *crtc;
639 struct drm_framebuffer *fb;
643 FBC_OK, /* FBC is enabled */
644 FBC_UNSUPPORTED, /* FBC is not supported by this chipset */
645 FBC_NO_OUTPUT, /* no outputs enabled to compress */
646 FBC_STOLEN_TOO_SMALL, /* not enough space for buffers */
647 FBC_UNSUPPORTED_MODE, /* interlace or doublescanned mode */
648 FBC_MODE_TOO_LARGE, /* mode too large for compression */
649 FBC_BAD_PLANE, /* fbc not supported on plane */
650 FBC_NOT_TILED, /* buffer not tiled */
651 FBC_MULTIPLE_PIPES, /* more than one pipe active */
653 FBC_CHIP_DEFAULT, /* disabled by default on this chip */
658 struct intel_connector *connector;
666 struct intel_dp *enabled;
668 struct delayed_work work;
669 unsigned busy_frontbuffer_bits;
673 PCH_NONE = 0, /* No PCH present */
674 PCH_IBX, /* Ibexpeak PCH */
675 PCH_CPT, /* Cougarpoint PCH */
676 PCH_LPT, /* Lynxpoint PCH */
680 enum intel_sbi_destination {
685 #define QUIRK_PIPEA_FORCE (1<<0)
686 #define QUIRK_LVDS_SSC_DISABLE (1<<1)
687 #define QUIRK_INVERT_BRIGHTNESS (1<<2)
690 struct intel_fbc_work;
693 struct i2c_adapter adapter;
697 struct i2c_algo_bit_data bit_algo;
698 struct drm_i915_private *dev_priv;
701 struct i915_suspend_saved_registers {
722 u32 saveTRANS_HTOTAL_A;
723 u32 saveTRANS_HBLANK_A;
724 u32 saveTRANS_HSYNC_A;
725 u32 saveTRANS_VTOTAL_A;
726 u32 saveTRANS_VBLANK_A;
727 u32 saveTRANS_VSYNC_A;
735 u32 savePFIT_PGM_RATIOS;
736 u32 saveBLC_HIST_CTL;
738 u32 saveBLC_PWM_CTL2;
739 u32 saveBLC_HIST_CTL_B;
740 u32 saveBLC_CPU_PWM_CTL;
741 u32 saveBLC_CPU_PWM_CTL2;
754 u32 saveTRANS_HTOTAL_B;
755 u32 saveTRANS_HBLANK_B;
756 u32 saveTRANS_HSYNC_B;
757 u32 saveTRANS_VTOTAL_B;
758 u32 saveTRANS_VBLANK_B;
759 u32 saveTRANS_VSYNC_B;
773 u32 savePP_ON_DELAYS;
774 u32 savePP_OFF_DELAYS;
782 u32 savePFIT_CONTROL;
783 u32 save_palette_a[256];
784 u32 save_palette_b[256];
795 u32 saveCACHE_MODE_0;
796 u32 saveMI_ARB_STATE;
807 uint64_t saveFENCE[I915_MAX_NUM_FENCES];
818 u32 savePIPEA_GMCH_DATA_M;
819 u32 savePIPEB_GMCH_DATA_M;
820 u32 savePIPEA_GMCH_DATA_N;
821 u32 savePIPEB_GMCH_DATA_N;
822 u32 savePIPEA_DP_LINK_M;
823 u32 savePIPEB_DP_LINK_M;
824 u32 savePIPEA_DP_LINK_N;
825 u32 savePIPEB_DP_LINK_N;
836 u32 savePCH_DREF_CONTROL;
837 u32 saveDISP_ARB_CTL;
838 u32 savePIPEA_DATA_M1;
839 u32 savePIPEA_DATA_N1;
840 u32 savePIPEA_LINK_M1;
841 u32 savePIPEA_LINK_N1;
842 u32 savePIPEB_DATA_M1;
843 u32 savePIPEB_DATA_N1;
844 u32 savePIPEB_LINK_M1;
845 u32 savePIPEB_LINK_N1;
846 u32 saveMCHBAR_RENDER_STANDBY;
847 u32 savePCH_PORT_HOTPLUG;
850 struct vlv_s0ix_state {
857 u32 lra_limits[GEN7_LRA_LIMITS_REG_NUM];
858 u32 media_max_req_count;
859 u32 gfx_max_req_count;
891 /* Display 1 CZ domain */
896 u32 gt_scratch[GEN7_GT_SCRATCH_REG_NUM];
898 /* GT SA CZ domain */
905 /* Display 2 CZ domain */
911 struct intel_rps_ei {
917 struct intel_gen6_power_mgmt {
918 /* work and pm_iir are protected by dev_priv->irq_lock */
919 struct work_struct work;
922 /* Frequencies are stored in potentially platform dependent multiples.
923 * In other words, *_freq needs to be multiplied by X to be interesting.
924 * Soft limits are those which are used for the dynamic reclocking done
925 * by the driver (raise frequencies under heavy loads, and lower for
926 * lighter loads). Hard limits are those imposed by the hardware.
928 * A distinction is made for overclocking, which is never enabled by
929 * default, and is considered to be above the hard limit if it's
932 u8 cur_freq; /* Current frequency (cached, may not == HW) */
933 u8 min_freq_softlimit; /* Minimum frequency permitted by the driver */
934 u8 max_freq_softlimit; /* Max frequency permitted by the driver */
935 u8 max_freq; /* Maximum frequency, RP0 if not overclocking */
936 u8 min_freq; /* AKA RPn. Minimum frequency */
937 u8 efficient_freq; /* AKA RPe. Pre-determined balanced frequency */
938 u8 rp1_freq; /* "less than" RP0 power/freqency */
939 u8 rp0_freq; /* Non-overclocked max frequency. */
942 u32 ei_interrupt_count;
945 enum { LOW_POWER, BETWEEN, HIGH_POWER } power;
948 struct delayed_work delayed_resume_work;
950 /* manual wa residency calculations */
951 struct intel_rps_ei up_ei, down_ei;
954 * Protects RPS/RC6 register access and PCU communication.
955 * Must be taken after struct_mutex if nested.
957 struct mutex hw_lock;
960 /* defined intel_pm.c */
961 extern spinlock_t mchdev_lock;
963 struct intel_ilk_power_mgmt {
971 unsigned long last_time1;
972 unsigned long chipset_power;
974 struct timespec last_time2;
975 unsigned long gfx_power;
981 struct drm_i915_gem_object *pwrctx;
982 struct drm_i915_gem_object *renderctx;
985 struct drm_i915_private;
986 struct i915_power_well;
988 struct i915_power_well_ops {
990 * Synchronize the well's hw state to match the current sw state, for
991 * example enable/disable it based on the current refcount. Called
992 * during driver init and resume time, possibly after first calling
993 * the enable/disable handlers.
995 void (*sync_hw)(struct drm_i915_private *dev_priv,
996 struct i915_power_well *power_well);
998 * Enable the well and resources that depend on it (for example
999 * interrupts located on the well). Called after the 0->1 refcount
1002 void (*enable)(struct drm_i915_private *dev_priv,
1003 struct i915_power_well *power_well);
1005 * Disable the well and resources that depend on it. Called after
1006 * the 1->0 refcount transition.
1008 void (*disable)(struct drm_i915_private *dev_priv,
1009 struct i915_power_well *power_well);
1010 /* Returns the hw enabled state. */
1011 bool (*is_enabled)(struct drm_i915_private *dev_priv,
1012 struct i915_power_well *power_well);
1015 /* Power well structure for haswell */
1016 struct i915_power_well {
1019 /* power well enable/disable usage count */
1021 /* cached hw enabled state */
1023 unsigned long domains;
1025 const struct i915_power_well_ops *ops;
1028 struct i915_power_domains {
1030 * Power wells needed for initialization at driver init and suspend
1031 * time are on. They are kept on until after the first modeset.
1035 int power_well_count;
1038 int domain_use_count[POWER_DOMAIN_NUM];
1039 struct i915_power_well *power_wells;
1042 struct i915_dri1_state {
1043 unsigned allow_batchbuffer : 1;
1044 u32 __iomem *gfx_hws_cpu_addr;
1055 struct i915_ums_state {
1057 * Flag if the X Server, and thus DRM, is not currently in
1058 * control of the device.
1060 * This is set between LeaveVT and EnterVT. It needs to be
1061 * replaced with a semaphore. It also needs to be
1062 * transitioned away from for kernel modesetting.
1067 #define MAX_L3_SLICES 2
1068 struct intel_l3_parity {
1069 u32 *remap_info[MAX_L3_SLICES];
1070 struct work_struct error_work;
1074 struct i915_gem_mm {
1075 /** Memory allocator for GTT stolen memory */
1076 struct drm_mm stolen;
1077 /** List of all objects in gtt_space. Used to restore gtt
1078 * mappings on resume */
1079 struct list_head bound_list;
1081 * List of objects which are not bound to the GTT (thus
1082 * are idle and not used by the GPU) but still have
1083 * (presumably uncached) pages still attached.
1085 struct list_head unbound_list;
1087 /** Usable portion of the GTT for GEM */
1088 unsigned long stolen_base; /* limited to low memory (32-bit) */
1090 /** PPGTT used for aliasing the PPGTT with the GTT */
1091 struct i915_hw_ppgtt *aliasing_ppgtt;
1093 struct notifier_block oom_notifier;
1094 struct shrinker shrinker;
1095 bool shrinker_no_lock_stealing;
1097 /** LRU list of objects with fence regs on them. */
1098 struct list_head fence_list;
1101 * We leave the user IRQ off as much as possible,
1102 * but this means that requests will finish and never
1103 * be retired once the system goes idle. Set a timer to
1104 * fire periodically while the ring is running. When it
1105 * fires, go retire requests.
1107 struct delayed_work retire_work;
1110 * When we detect an idle GPU, we want to turn on
1111 * powersaving features. So once we see that there
1112 * are no more requests outstanding and no more
1113 * arrive within a small period of time, we fire
1114 * off the idle_work.
1116 struct delayed_work idle_work;
1119 * Are we in a non-interruptible section of code like
1125 * Is the GPU currently considered idle, or busy executing userspace
1126 * requests? Whilst idle, we attempt to power down the hardware and
1127 * display clocks. In order to reduce the effect on performance, there
1128 * is a slight delay before we do so.
1132 /* the indicator for dispatch video commands on two BSD rings */
1133 int bsd_ring_dispatch_index;
1135 /** Bit 6 swizzling required for X tiling */
1136 uint32_t bit_6_swizzle_x;
1137 /** Bit 6 swizzling required for Y tiling */
1138 uint32_t bit_6_swizzle_y;
1140 /* accounting, useful for userland debugging */
1141 spinlock_t object_stat_lock;
1142 size_t object_memory;
1146 struct drm_i915_error_state_buf {
1155 struct i915_error_state_file_priv {
1156 struct drm_device *dev;
1157 struct drm_i915_error_state *error;
1160 struct i915_gpu_error {
1161 /* For hangcheck timer */
1162 #define DRM_I915_HANGCHECK_PERIOD 1500 /* in ms */
1163 #define DRM_I915_HANGCHECK_JIFFIES msecs_to_jiffies(DRM_I915_HANGCHECK_PERIOD)
1164 /* Hang gpu twice in this window and your context gets banned */
1165 #define DRM_I915_CTX_BAN_PERIOD DIV_ROUND_UP(8*DRM_I915_HANGCHECK_PERIOD, 1000)
1167 struct timer_list hangcheck_timer;
1169 /* For reset and error_state handling. */
1171 /* Protected by the above dev->gpu_error.lock. */
1172 struct drm_i915_error_state *first_error;
1173 struct work_struct work;
1176 unsigned long missed_irq_rings;
1179 * State variable controlling the reset flow and count
1181 * This is a counter which gets incremented when reset is triggered,
1182 * and again when reset has been handled. So odd values (lowest bit set)
1183 * means that reset is in progress and even values that
1184 * (reset_counter >> 1):th reset was successfully completed.
1186 * If reset is not completed succesfully, the I915_WEDGE bit is
1187 * set meaning that hardware is terminally sour and there is no
1188 * recovery. All waiters on the reset_queue will be woken when
1191 * This counter is used by the wait_seqno code to notice that reset
1192 * event happened and it needs to restart the entire ioctl (since most
1193 * likely the seqno it waited for won't ever signal anytime soon).
1195 * This is important for lock-free wait paths, where no contended lock
1196 * naturally enforces the correct ordering between the bail-out of the
1197 * waiter and the gpu reset work code.
1199 atomic_t reset_counter;
1201 #define I915_RESET_IN_PROGRESS_FLAG 1
1202 #define I915_WEDGED (1 << 31)
1205 * Waitqueue to signal when the reset has completed. Used by clients
1206 * that wait for dev_priv->mm.wedged to settle.
1208 wait_queue_head_t reset_queue;
1210 /* Userspace knobs for gpu hang simulation;
1211 * combines both a ring mask, and extra flags
1214 #define I915_STOP_RING_ALLOW_BAN (1 << 31)
1215 #define I915_STOP_RING_ALLOW_WARN (1 << 30)
1217 /* For missed irq/seqno simulation. */
1218 unsigned int test_irq_rings;
1221 enum modeset_restore {
1222 MODESET_ON_LID_OPEN,
1227 struct ddi_vbt_port_info {
1228 uint8_t hdmi_level_shift;
1230 uint8_t supports_dvi:1;
1231 uint8_t supports_hdmi:1;
1232 uint8_t supports_dp:1;
1235 enum drrs_support_type {
1236 DRRS_NOT_SUPPORTED = 0,
1237 STATIC_DRRS_SUPPORT = 1,
1238 SEAMLESS_DRRS_SUPPORT = 2
1241 struct intel_vbt_data {
1242 struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */
1243 struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */
1246 unsigned int int_tv_support:1;
1247 unsigned int lvds_dither:1;
1248 unsigned int lvds_vbt:1;
1249 unsigned int int_crt_support:1;
1250 unsigned int lvds_use_ssc:1;
1251 unsigned int display_clock_mode:1;
1252 unsigned int fdi_rx_polarity_inverted:1;
1253 unsigned int has_mipi:1;
1255 unsigned int bios_lvds_val; /* initial [PCH_]LVDS reg val in VBIOS */
1257 enum drrs_support_type drrs_type;
1262 int edp_preemphasis;
1264 bool edp_initialized;
1267 struct edp_power_seq edp_pps;
1272 bool active_low_pwm;
1279 struct mipi_config *config;
1280 struct mipi_pps_data *pps;
1284 u8 *sequence[MIPI_SEQ_MAX];
1290 union child_device_config *child_dev;
1292 struct ddi_vbt_port_info ddi_port_info[I915_MAX_PORTS];
1295 enum intel_ddb_partitioning {
1297 INTEL_DDB_PART_5_6, /* IVB+ */
1300 struct intel_wm_level {
1308 struct ilk_wm_values {
1309 uint32_t wm_pipe[3];
1311 uint32_t wm_lp_spr[3];
1312 uint32_t wm_linetime[3];
1314 enum intel_ddb_partitioning partitioning;
1318 * This struct helps tracking the state needed for runtime PM, which puts the
1319 * device in PCI D3 state. Notice that when this happens, nothing on the
1320 * graphics device works, even register access, so we don't get interrupts nor
1323 * Every piece of our code that needs to actually touch the hardware needs to
1324 * either call intel_runtime_pm_get or call intel_display_power_get with the
1325 * appropriate power domain.
1327 * Our driver uses the autosuspend delay feature, which means we'll only really
1328 * suspend if we stay with zero refcount for a certain amount of time. The
1329 * default value is currently very conservative (see intel_init_runtime_pm), but
1330 * it can be changed with the standard runtime PM files from sysfs.
1332 * The irqs_disabled variable becomes true exactly after we disable the IRQs and
1333 * goes back to false exactly before we reenable the IRQs. We use this variable
1334 * to check if someone is trying to enable/disable IRQs while they're supposed
1335 * to be disabled. This shouldn't happen and we'll print some error messages in
1338 * For more, read the Documentation/power/runtime_pm.txt.
1340 struct i915_runtime_pm {
1342 bool _irqs_disabled;
1345 enum intel_pipe_crc_source {
1346 INTEL_PIPE_CRC_SOURCE_NONE,
1347 INTEL_PIPE_CRC_SOURCE_PLANE1,
1348 INTEL_PIPE_CRC_SOURCE_PLANE2,
1349 INTEL_PIPE_CRC_SOURCE_PF,
1350 INTEL_PIPE_CRC_SOURCE_PIPE,
1351 /* TV/DP on pre-gen5/vlv can't use the pipe source. */
1352 INTEL_PIPE_CRC_SOURCE_TV,
1353 INTEL_PIPE_CRC_SOURCE_DP_B,
1354 INTEL_PIPE_CRC_SOURCE_DP_C,
1355 INTEL_PIPE_CRC_SOURCE_DP_D,
1356 INTEL_PIPE_CRC_SOURCE_AUTO,
1357 INTEL_PIPE_CRC_SOURCE_MAX,
1360 struct intel_pipe_crc_entry {
1365 #define INTEL_PIPE_CRC_ENTRIES_NR 128
1366 struct intel_pipe_crc {
1368 bool opened; /* exclusive access to the result file */
1369 struct intel_pipe_crc_entry *entries;
1370 enum intel_pipe_crc_source source;
1372 wait_queue_head_t wq;
1375 struct i915_frontbuffer_tracking {
1379 * Tracking bits for delayed frontbuffer flushing du to gpu activity or
1386 struct drm_i915_private {
1387 struct drm_device *dev;
1388 struct kmem_cache *slab;
1390 const struct intel_device_info info;
1392 int relative_constants_mode;
1396 struct intel_uncore uncore;
1398 struct intel_gmbus gmbus[GMBUS_NUM_PORTS];
1401 /** gmbus_mutex protects against concurrent usage of the single hw gmbus
1402 * controller on different i2c buses. */
1403 struct mutex gmbus_mutex;
1406 * Base address of the gmbus and gpio block.
1408 uint32_t gpio_mmio_base;
1410 /* MMIO base address for MIPI regs */
1411 uint32_t mipi_mmio_base;
1413 wait_queue_head_t gmbus_wait_queue;
1415 struct pci_dev *bridge_dev;
1416 struct intel_engine_cs ring[I915_NUM_RINGS];
1417 struct drm_i915_gem_object *semaphore_obj;
1418 uint32_t last_seqno, next_seqno;
1420 drm_dma_handle_t *status_page_dmah;
1421 struct resource mch_res;
1423 /* protects the irq masks */
1424 spinlock_t irq_lock;
1426 /* protects the mmio flip data */
1427 spinlock_t mmio_flip_lock;
1429 bool display_irqs_enabled;
1431 /* To control wakeup latency, e.g. for irq-driven dp aux transfers. */
1432 struct pm_qos_request pm_qos;
1434 /* DPIO indirect register protection */
1435 struct mutex dpio_lock;
1437 /** Cached value of IMR to avoid reads in updating the bitfield */
1440 u32 de_irq_mask[I915_MAX_PIPES];
1445 u32 pipestat_irq_mask[I915_MAX_PIPES];
1447 struct work_struct hotplug_work;
1448 bool enable_hotplug_processing;
1450 unsigned long hpd_last_jiffies;
1455 HPD_MARK_DISABLED = 2
1457 } hpd_stats[HPD_NUM_PINS];
1459 struct timer_list hotplug_reenable_timer;
1461 struct i915_fbc fbc;
1462 struct i915_drrs drrs;
1463 struct intel_opregion opregion;
1464 struct intel_vbt_data vbt;
1467 struct intel_overlay *overlay;
1469 /* backlight registers and fields in struct intel_panel */
1470 spinlock_t backlight_lock;
1473 bool no_aux_handshake;
1475 struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
1476 int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */
1477 int num_fence_regs; /* 8 on pre-965, 16 otherwise */
1479 unsigned int fsb_freq, mem_freq, is_ddr3;
1480 unsigned int vlv_cdclk_freq;
1483 * wq - Driver workqueue for GEM.
1485 * NOTE: Work items scheduled here are not allowed to grab any modeset
1486 * locks, for otherwise the flushing done in the pageflip code will
1487 * result in deadlocks.
1489 struct workqueue_struct *wq;
1491 /* Display functions */
1492 struct drm_i915_display_funcs display;
1494 /* PCH chipset type */
1495 enum intel_pch pch_type;
1496 unsigned short pch_id;
1498 unsigned long quirks;
1500 enum modeset_restore modeset_restore;
1501 struct mutex modeset_restore_lock;
1503 struct list_head vm_list; /* Global list of all address spaces */
1504 struct i915_gtt gtt; /* VM representing the global address space */
1506 struct i915_gem_mm mm;
1507 #if defined(CONFIG_MMU_NOTIFIER)
1508 DECLARE_HASHTABLE(mmu_notifiers, 7);
1511 /* Kernel Modesetting */
1513 struct sdvo_device_mapping sdvo_mappings[2];
1515 struct drm_crtc *plane_to_crtc_mapping[I915_MAX_PIPES];
1516 struct drm_crtc *pipe_to_crtc_mapping[I915_MAX_PIPES];
1517 wait_queue_head_t pending_flip_queue;
1519 #ifdef CONFIG_DEBUG_FS
1520 struct intel_pipe_crc pipe_crc[I915_MAX_PIPES];
1523 int num_shared_dpll;
1524 struct intel_shared_dpll shared_dplls[I915_NUM_PLLS];
1525 int dpio_phy_iosf_port[I915_NUM_PHYS_VLV];
1527 /* Reclocking support */
1528 bool render_reclock_avail;
1529 bool lvds_downclock_avail;
1530 /* indicates the reduced downclock for LVDS*/
1533 struct i915_frontbuffer_tracking fb_tracking;
1537 bool mchbar_need_disable;
1539 struct intel_l3_parity l3_parity;
1541 /* Cannot be determined by PCIID. You must always read a register. */
1544 /* gen6+ rps state */
1545 struct intel_gen6_power_mgmt rps;
1547 /* ilk-only ips/rps state. Everything in here is protected by the global
1548 * mchdev_lock in intel_pm.c */
1549 struct intel_ilk_power_mgmt ips;
1551 struct i915_power_domains power_domains;
1553 struct i915_psr psr;
1555 struct i915_gpu_error gpu_error;
1557 struct drm_i915_gem_object *vlv_pctx;
1559 #ifdef CONFIG_DRM_I915_FBDEV
1560 /* list of fbdev register on this device */
1561 struct intel_fbdev *fbdev;
1565 * The console may be contended at resume, but we don't
1566 * want it to block on it.
1568 struct work_struct console_resume_work;
1570 struct drm_property *broadcast_rgb_property;
1571 struct drm_property *force_audio_property;
1573 uint32_t hw_context_size;
1574 struct list_head context_list;
1579 struct i915_suspend_saved_registers regfile;
1580 struct vlv_s0ix_state vlv_s0ix_state;
1584 * Raw watermark latency values:
1585 * in 0.1us units for WM0,
1586 * in 0.5us units for WM1+.
1589 uint16_t pri_latency[5];
1591 uint16_t spr_latency[5];
1593 uint16_t cur_latency[5];
1595 /* current hardware state */
1596 struct ilk_wm_values hw;
1599 struct i915_runtime_pm pm;
1601 struct intel_digital_port *hpd_irq_port[I915_MAX_PORTS];
1602 u32 long_hpd_port_mask;
1603 u32 short_hpd_port_mask;
1604 struct work_struct dig_port_work;
1606 /* Old dri1 support infrastructure, beware the dragons ya fools entering
1608 struct i915_dri1_state dri1;
1609 /* Old ums support infrastructure, same warning applies. */
1610 struct i915_ums_state ums;
1613 * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
1614 * will be rejected. Instead look for a better place.
1618 static inline struct drm_i915_private *to_i915(const struct drm_device *dev)
1620 return dev->dev_private;
1623 /* Iterate over initialised rings */
1624 #define for_each_ring(ring__, dev_priv__, i__) \
1625 for ((i__) = 0; (i__) < I915_NUM_RINGS; (i__)++) \
1626 if (((ring__) = &(dev_priv__)->ring[(i__)]), intel_ring_initialized((ring__)))
1628 enum hdmi_force_audio {
1629 HDMI_AUDIO_OFF_DVI = -2, /* no aux data for HDMI-DVI converter */
1630 HDMI_AUDIO_OFF, /* force turn off HDMI audio */
1631 HDMI_AUDIO_AUTO, /* trust EDID */
1632 HDMI_AUDIO_ON, /* force turn on HDMI audio */
1635 #define I915_GTT_OFFSET_NONE ((u32)-1)
1637 struct drm_i915_gem_object_ops {
1638 /* Interface between the GEM object and its backing storage.
1639 * get_pages() is called once prior to the use of the associated set
1640 * of pages before to binding them into the GTT, and put_pages() is
1641 * called after we no longer need them. As we expect there to be
1642 * associated cost with migrating pages between the backing storage
1643 * and making them available for the GPU (e.g. clflush), we may hold
1644 * onto the pages after they are no longer referenced by the GPU
1645 * in case they may be used again shortly (for example migrating the
1646 * pages to a different memory domain within the GTT). put_pages()
1647 * will therefore most likely be called when the object itself is
1648 * being released or under memory pressure (where we attempt to
1649 * reap pages for the shrinker).
1651 int (*get_pages)(struct drm_i915_gem_object *);
1652 void (*put_pages)(struct drm_i915_gem_object *);
1653 int (*dmabuf_export)(struct drm_i915_gem_object *);
1654 void (*release)(struct drm_i915_gem_object *);
1658 * Frontbuffer tracking bits. Set in obj->frontbuffer_bits while a gem bo is
1659 * considered to be the frontbuffer for the given plane interface-vise. This
1660 * doesn't mean that the hw necessarily already scans it out, but that any
1661 * rendering (by the cpu or gpu) will land in the frontbuffer eventually.
1663 * We have one bit per pipe and per scanout plane type.
1665 #define INTEL_FRONTBUFFER_BITS_PER_PIPE 4
1666 #define INTEL_FRONTBUFFER_BITS \
1667 (INTEL_FRONTBUFFER_BITS_PER_PIPE * I915_MAX_PIPES)
1668 #define INTEL_FRONTBUFFER_PRIMARY(pipe) \
1669 (1 << (INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe)))
1670 #define INTEL_FRONTBUFFER_CURSOR(pipe) \
1671 (1 << (1 +(INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))))
1672 #define INTEL_FRONTBUFFER_SPRITE(pipe) \
1673 (1 << (2 +(INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))))
1674 #define INTEL_FRONTBUFFER_OVERLAY(pipe) \
1675 (1 << (3 +(INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))))
1676 #define INTEL_FRONTBUFFER_ALL_MASK(pipe) \
1677 (0xf << (INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe)))
1679 struct drm_i915_gem_object {
1680 struct drm_gem_object base;
1682 const struct drm_i915_gem_object_ops *ops;
1684 /** List of VMAs backed by this object */
1685 struct list_head vma_list;
1687 /** Stolen memory for this object, instead of being backed by shmem. */
1688 struct drm_mm_node *stolen;
1689 struct list_head global_list;
1691 struct list_head ring_list;
1692 /** Used in execbuf to temporarily hold a ref */
1693 struct list_head obj_exec_link;
1696 * This is set if the object is on the active lists (has pending
1697 * rendering and so a non-zero seqno), and is not set if it i s on
1698 * inactive (ready to be unbound) list.
1700 unsigned int active:1;
1703 * This is set if the object has been written to since last bound
1706 unsigned int dirty:1;
1709 * Fence register bits (if any) for this object. Will be set
1710 * as needed when mapped into the GTT.
1711 * Protected by dev->struct_mutex.
1713 signed int fence_reg:I915_MAX_NUM_FENCE_BITS;
1716 * Advice: are the backing pages purgeable?
1718 unsigned int madv:2;
1721 * Current tiling mode for the object.
1723 unsigned int tiling_mode:2;
1725 * Whether the tiling parameters for the currently associated fence
1726 * register have changed. Note that for the purposes of tracking
1727 * tiling changes we also treat the unfenced register, the register
1728 * slot that the object occupies whilst it executes a fenced
1729 * command (such as BLT on gen2/3), as a "fence".
1731 unsigned int fence_dirty:1;
1734 * Is the object at the current location in the gtt mappable and
1735 * fenceable? Used to avoid costly recalculations.
1737 unsigned int map_and_fenceable:1;
1740 * Whether the current gtt mapping needs to be mappable (and isn't just
1741 * mappable by accident). Track pin and fault separate for a more
1742 * accurate mappable working set.
1744 unsigned int fault_mappable:1;
1745 unsigned int pin_mappable:1;
1746 unsigned int pin_display:1;
1749 * Is the object to be mapped as read-only to the GPU
1750 * Only honoured if hardware has relevant pte bit
1752 unsigned long gt_ro:1;
1755 * Is the GPU currently using a fence to access this buffer,
1757 unsigned int pending_fenced_gpu_access:1;
1758 unsigned int fenced_gpu_access:1;
1760 unsigned int cache_level:3;
1762 unsigned int has_aliasing_ppgtt_mapping:1;
1763 unsigned int has_global_gtt_mapping:1;
1764 unsigned int has_dma_mapping:1;
1766 unsigned int frontbuffer_bits:INTEL_FRONTBUFFER_BITS;
1768 struct sg_table *pages;
1769 int pages_pin_count;
1771 /* prime dma-buf support */
1772 void *dma_buf_vmapping;
1775 struct intel_engine_cs *ring;
1777 /** Breadcrumb of last rendering to the buffer. */
1778 uint32_t last_read_seqno;
1779 uint32_t last_write_seqno;
1780 /** Breadcrumb of last fenced GPU access to the buffer. */
1781 uint32_t last_fenced_seqno;
1783 /** Current tiling stride for the object, if it's tiled. */
1786 /** References from framebuffers, locks out tiling changes. */
1787 unsigned long framebuffer_references;
1789 /** Record of address bit 17 of each page at last unbind. */
1790 unsigned long *bit_17;
1792 /** User space pin count and filp owning the pin */
1793 unsigned long user_pin_count;
1794 struct drm_file *pin_filp;
1796 /** for phy allocated objects */
1797 drm_dma_handle_t *phys_handle;
1800 struct i915_gem_userptr {
1802 unsigned read_only :1;
1803 unsigned workers :4;
1804 #define I915_GEM_USERPTR_MAX_WORKERS 15
1806 struct mm_struct *mm;
1807 struct i915_mmu_object *mn;
1808 struct work_struct *work;
1812 #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base)
1814 void i915_gem_track_fb(struct drm_i915_gem_object *old,
1815 struct drm_i915_gem_object *new,
1816 unsigned frontbuffer_bits);
1819 * Request queue structure.
1821 * The request queue allows us to note sequence numbers that have been emitted
1822 * and may be associated with active buffers to be retired.
1824 * By keeping this list, we can avoid having to do questionable
1825 * sequence-number comparisons on buffer last_rendering_seqnos, and associate
1826 * an emission time with seqnos for tracking how far ahead of the GPU we are.
1828 struct drm_i915_gem_request {
1829 /** On Which ring this request was generated */
1830 struct intel_engine_cs *ring;
1832 /** GEM sequence number associated with this request. */
1835 /** Position in the ringbuffer of the start of the request */
1838 /** Position in the ringbuffer of the end of the request */
1841 /** Context related to this request */
1842 struct intel_context *ctx;
1844 /** Batch buffer related to this request if any */
1845 struct drm_i915_gem_object *batch_obj;
1847 /** Time at which this request was emitted, in jiffies. */
1848 unsigned long emitted_jiffies;
1850 /** global list entry for this request */
1851 struct list_head list;
1853 struct drm_i915_file_private *file_priv;
1854 /** file_priv list entry for this request */
1855 struct list_head client_list;
1858 struct drm_i915_file_private {
1859 struct drm_i915_private *dev_priv;
1860 struct drm_file *file;
1864 struct list_head request_list;
1865 struct delayed_work idle_work;
1867 struct idr context_idr;
1869 atomic_t rps_wait_boost;
1870 struct intel_engine_cs *bsd_ring;
1874 * A command that requires special handling by the command parser.
1876 struct drm_i915_cmd_descriptor {
1878 * Flags describing how the command parser processes the command.
1880 * CMD_DESC_FIXED: The command has a fixed length if this is set,
1881 * a length mask if not set
1882 * CMD_DESC_SKIP: The command is allowed but does not follow the
1883 * standard length encoding for the opcode range in
1885 * CMD_DESC_REJECT: The command is never allowed
1886 * CMD_DESC_REGISTER: The command should be checked against the
1887 * register whitelist for the appropriate ring
1888 * CMD_DESC_MASTER: The command is allowed if the submitting process
1892 #define CMD_DESC_FIXED (1<<0)
1893 #define CMD_DESC_SKIP (1<<1)
1894 #define CMD_DESC_REJECT (1<<2)
1895 #define CMD_DESC_REGISTER (1<<3)
1896 #define CMD_DESC_BITMASK (1<<4)
1897 #define CMD_DESC_MASTER (1<<5)
1900 * The command's unique identification bits and the bitmask to get them.
1901 * This isn't strictly the opcode field as defined in the spec and may
1902 * also include type, subtype, and/or subop fields.
1910 * The command's length. The command is either fixed length (i.e. does
1911 * not include a length field) or has a length field mask. The flag
1912 * CMD_DESC_FIXED indicates a fixed length. Otherwise, the command has
1913 * a length mask. All command entries in a command table must include
1914 * length information.
1922 * Describes where to find a register address in the command to check
1923 * against the ring's register whitelist. Only valid if flags has the
1924 * CMD_DESC_REGISTER bit set.
1931 #define MAX_CMD_DESC_BITMASKS 3
1933 * Describes command checks where a particular dword is masked and
1934 * compared against an expected value. If the command does not match
1935 * the expected value, the parser rejects it. Only valid if flags has
1936 * the CMD_DESC_BITMASK bit set. Only entries where mask is non-zero
1939 * If the check specifies a non-zero condition_mask then the parser
1940 * only performs the check when the bits specified by condition_mask
1947 u32 condition_offset;
1949 } bits[MAX_CMD_DESC_BITMASKS];
1953 * A table of commands requiring special handling by the command parser.
1955 * Each ring has an array of tables. Each table consists of an array of command
1956 * descriptors, which must be sorted with command opcodes in ascending order.
1958 struct drm_i915_cmd_table {
1959 const struct drm_i915_cmd_descriptor *table;
1963 #define INTEL_INFO(dev) (&to_i915(dev)->info)
1965 #define IS_I830(dev) ((dev)->pdev->device == 0x3577)
1966 #define IS_845G(dev) ((dev)->pdev->device == 0x2562)
1967 #define IS_I85X(dev) (INTEL_INFO(dev)->is_i85x)
1968 #define IS_I865G(dev) ((dev)->pdev->device == 0x2572)
1969 #define IS_I915G(dev) (INTEL_INFO(dev)->is_i915g)
1970 #define IS_I915GM(dev) ((dev)->pdev->device == 0x2592)
1971 #define IS_I945G(dev) ((dev)->pdev->device == 0x2772)
1972 #define IS_I945GM(dev) (INTEL_INFO(dev)->is_i945gm)
1973 #define IS_BROADWATER(dev) (INTEL_INFO(dev)->is_broadwater)
1974 #define IS_CRESTLINE(dev) (INTEL_INFO(dev)->is_crestline)
1975 #define IS_GM45(dev) ((dev)->pdev->device == 0x2A42)
1976 #define IS_G4X(dev) (INTEL_INFO(dev)->is_g4x)
1977 #define IS_PINEVIEW_G(dev) ((dev)->pdev->device == 0xa001)
1978 #define IS_PINEVIEW_M(dev) ((dev)->pdev->device == 0xa011)
1979 #define IS_PINEVIEW(dev) (INTEL_INFO(dev)->is_pineview)
1980 #define IS_G33(dev) (INTEL_INFO(dev)->is_g33)
1981 #define IS_IRONLAKE_M(dev) ((dev)->pdev->device == 0x0046)
1982 #define IS_IVYBRIDGE(dev) (INTEL_INFO(dev)->is_ivybridge)
1983 #define IS_IVB_GT1(dev) ((dev)->pdev->device == 0x0156 || \
1984 (dev)->pdev->device == 0x0152 || \
1985 (dev)->pdev->device == 0x015a)
1986 #define IS_SNB_GT1(dev) ((dev)->pdev->device == 0x0102 || \
1987 (dev)->pdev->device == 0x0106 || \
1988 (dev)->pdev->device == 0x010A)
1989 #define IS_VALLEYVIEW(dev) (INTEL_INFO(dev)->is_valleyview)
1990 #define IS_CHERRYVIEW(dev) (INTEL_INFO(dev)->is_valleyview && IS_GEN8(dev))
1991 #define IS_HASWELL(dev) (INTEL_INFO(dev)->is_haswell)
1992 #define IS_BROADWELL(dev) (!INTEL_INFO(dev)->is_valleyview && IS_GEN8(dev))
1993 #define IS_MOBILE(dev) (INTEL_INFO(dev)->is_mobile)
1994 #define IS_HSW_EARLY_SDV(dev) (IS_HASWELL(dev) && \
1995 ((dev)->pdev->device & 0xFF00) == 0x0C00)
1996 #define IS_BDW_ULT(dev) (IS_BROADWELL(dev) && \
1997 (((dev)->pdev->device & 0xf) == 0x2 || \
1998 ((dev)->pdev->device & 0xf) == 0x6 || \
1999 ((dev)->pdev->device & 0xf) == 0xe))
2000 #define IS_HSW_ULT(dev) (IS_HASWELL(dev) && \
2001 ((dev)->pdev->device & 0xFF00) == 0x0A00)
2002 #define IS_ULT(dev) (IS_HSW_ULT(dev) || IS_BDW_ULT(dev))
2003 #define IS_HSW_GT3(dev) (IS_HASWELL(dev) && \
2004 ((dev)->pdev->device & 0x00F0) == 0x0020)
2005 /* ULX machines are also considered ULT. */
2006 #define IS_HSW_ULX(dev) ((dev)->pdev->device == 0x0A0E || \
2007 (dev)->pdev->device == 0x0A1E)
2008 #define IS_PRELIMINARY_HW(intel_info) ((intel_info)->is_preliminary)
2011 * The genX designation typically refers to the render engine, so render
2012 * capability related checks should use IS_GEN, while display and other checks
2013 * have their own (e.g. HAS_PCH_SPLIT for ILK+ display, IS_foo for particular
2016 #define IS_GEN2(dev) (INTEL_INFO(dev)->gen == 2)
2017 #define IS_GEN3(dev) (INTEL_INFO(dev)->gen == 3)
2018 #define IS_GEN4(dev) (INTEL_INFO(dev)->gen == 4)
2019 #define IS_GEN5(dev) (INTEL_INFO(dev)->gen == 5)
2020 #define IS_GEN6(dev) (INTEL_INFO(dev)->gen == 6)
2021 #define IS_GEN7(dev) (INTEL_INFO(dev)->gen == 7)
2022 #define IS_GEN8(dev) (INTEL_INFO(dev)->gen == 8)
2024 #define RENDER_RING (1<<RCS)
2025 #define BSD_RING (1<<VCS)
2026 #define BLT_RING (1<<BCS)
2027 #define VEBOX_RING (1<<VECS)
2028 #define BSD2_RING (1<<VCS2)
2029 #define HAS_BSD(dev) (INTEL_INFO(dev)->ring_mask & BSD_RING)
2030 #define HAS_BSD2(dev) (INTEL_INFO(dev)->ring_mask & BSD2_RING)
2031 #define HAS_BLT(dev) (INTEL_INFO(dev)->ring_mask & BLT_RING)
2032 #define HAS_VEBOX(dev) (INTEL_INFO(dev)->ring_mask & VEBOX_RING)
2033 #define HAS_LLC(dev) (INTEL_INFO(dev)->has_llc)
2034 #define HAS_WT(dev) ((IS_HASWELL(dev) || IS_BROADWELL(dev)) && \
2035 to_i915(dev)->ellc_size)
2036 #define I915_NEED_GFX_HWS(dev) (INTEL_INFO(dev)->need_gfx_hws)
2038 #define HAS_HW_CONTEXTS(dev) (INTEL_INFO(dev)->gen >= 6)
2039 #define HAS_ALIASING_PPGTT(dev) (INTEL_INFO(dev)->gen >= 6)
2040 #define HAS_PPGTT(dev) (INTEL_INFO(dev)->gen >= 7 && !IS_GEN8(dev))
2041 #define USES_PPGTT(dev) intel_enable_ppgtt(dev, false)
2042 #define USES_FULL_PPGTT(dev) intel_enable_ppgtt(dev, true)
2044 #define HAS_OVERLAY(dev) (INTEL_INFO(dev)->has_overlay)
2045 #define OVERLAY_NEEDS_PHYSICAL(dev) (INTEL_INFO(dev)->overlay_needs_physical)
2047 /* Early gen2 have a totally busted CS tlb and require pinned batches. */
2048 #define HAS_BROKEN_CS_TLB(dev) (IS_I830(dev) || IS_845G(dev))
2050 * dp aux and gmbus irq on gen4 seems to be able to generate legacy interrupts
2051 * even when in MSI mode. This results in spurious interrupt warnings if the
2052 * legacy irq no. is shared with another device. The kernel then disables that
2053 * interrupt source and so prevents the other device from working properly.
2055 #define HAS_AUX_IRQ(dev) (INTEL_INFO(dev)->gen >= 5)
2056 #define HAS_GMBUS_IRQ(dev) (INTEL_INFO(dev)->gen >= 5)
2058 /* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte
2059 * rows, which changed the alignment requirements and fence programming.
2061 #define HAS_128_BYTE_Y_TILING(dev) (!IS_GEN2(dev) && !(IS_I915G(dev) || \
2063 #define SUPPORTS_DIGITAL_OUTPUTS(dev) (!IS_GEN2(dev) && !IS_PINEVIEW(dev))
2064 #define SUPPORTS_INTEGRATED_HDMI(dev) (IS_G4X(dev) || IS_GEN5(dev))
2065 #define SUPPORTS_INTEGRATED_DP(dev) (IS_G4X(dev) || IS_GEN5(dev))
2066 #define SUPPORTS_TV(dev) (INTEL_INFO(dev)->supports_tv)
2067 #define I915_HAS_HOTPLUG(dev) (INTEL_INFO(dev)->has_hotplug)
2069 #define HAS_FW_BLC(dev) (INTEL_INFO(dev)->gen > 2)
2070 #define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr)
2071 #define HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc)
2073 #define HAS_IPS(dev) (IS_ULT(dev) || IS_BROADWELL(dev))
2075 #define HAS_DDI(dev) (INTEL_INFO(dev)->has_ddi)
2076 #define HAS_FPGA_DBG_UNCLAIMED(dev) (INTEL_INFO(dev)->has_fpga_dbg)
2077 #define HAS_PSR(dev) (IS_HASWELL(dev) || IS_BROADWELL(dev))
2078 #define HAS_RUNTIME_PM(dev) (IS_GEN6(dev) || IS_HASWELL(dev) || \
2079 IS_BROADWELL(dev) || IS_VALLEYVIEW(dev))
2081 #define INTEL_PCH_DEVICE_ID_MASK 0xff00
2082 #define INTEL_PCH_IBX_DEVICE_ID_TYPE 0x3b00
2083 #define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
2084 #define INTEL_PCH_PPT_DEVICE_ID_TYPE 0x1e00
2085 #define INTEL_PCH_LPT_DEVICE_ID_TYPE 0x8c00
2086 #define INTEL_PCH_LPT_LP_DEVICE_ID_TYPE 0x9c00
2088 #define INTEL_PCH_TYPE(dev) (to_i915(dev)->pch_type)
2089 #define HAS_PCH_LPT(dev) (INTEL_PCH_TYPE(dev) == PCH_LPT)
2090 #define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT)
2091 #define HAS_PCH_IBX(dev) (INTEL_PCH_TYPE(dev) == PCH_IBX)
2092 #define HAS_PCH_NOP(dev) (INTEL_PCH_TYPE(dev) == PCH_NOP)
2093 #define HAS_PCH_SPLIT(dev) (INTEL_PCH_TYPE(dev) != PCH_NONE)
2095 #define HAS_GMCH_DISPLAY(dev) (INTEL_INFO(dev)->gen < 5 || IS_VALLEYVIEW(dev))
2097 /* DPF == dynamic parity feature */
2098 #define HAS_L3_DPF(dev) (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
2099 #define NUM_L3_SLICES(dev) (IS_HSW_GT3(dev) ? 2 : HAS_L3_DPF(dev))
2101 #define GT_FREQUENCY_MULTIPLIER 50
2103 #include "i915_trace.h"
2105 extern const struct drm_ioctl_desc i915_ioctls[];
2106 extern int i915_max_ioctl;
2108 extern int i915_suspend(struct drm_device *dev, pm_message_t state);
2109 extern int i915_resume(struct drm_device *dev);
2110 extern int i915_master_create(struct drm_device *dev, struct drm_master *master);
2111 extern void i915_master_destroy(struct drm_device *dev, struct drm_master *master);
2114 struct i915_params {
2116 int panel_ignore_lid;
2117 unsigned int powersave;
2119 unsigned int lvds_downclock;
2120 int lvds_channel_mode;
2122 int vbt_sdvo_panel_type;
2127 unsigned int preliminary_hw_support;
2128 int disable_power_well;
2130 int invert_brightness;
2131 int enable_cmd_parser;
2132 /* leave bools at the end to not create holes */
2133 bool enable_hangcheck;
2135 bool prefault_disable;
2137 bool disable_display;
2138 bool disable_vtd_wa;
2142 extern struct i915_params i915 __read_mostly;
2145 void i915_update_dri1_breadcrumb(struct drm_device *dev);
2146 extern void i915_kernel_lost_context(struct drm_device * dev);
2147 extern int i915_driver_load(struct drm_device *, unsigned long flags);
2148 extern int i915_driver_unload(struct drm_device *);
2149 extern int i915_driver_open(struct drm_device *dev, struct drm_file *file);
2150 extern void i915_driver_lastclose(struct drm_device * dev);
2151 extern void i915_driver_preclose(struct drm_device *dev,
2152 struct drm_file *file);
2153 extern void i915_driver_postclose(struct drm_device *dev,
2154 struct drm_file *file);
2155 extern int i915_driver_device_is_agp(struct drm_device * dev);
2156 #ifdef CONFIG_COMPAT
2157 extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
2160 extern int i915_emit_box(struct drm_device *dev,
2161 struct drm_clip_rect *box,
2163 extern int intel_gpu_reset(struct drm_device *dev);
2164 extern int i915_reset(struct drm_device *dev);
2165 extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
2166 extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
2167 extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
2168 extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
2169 int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool on);
2171 extern void intel_console_resume(struct work_struct *work);
2174 void i915_queue_hangcheck(struct drm_device *dev);
2176 void i915_handle_error(struct drm_device *dev, bool wedged,
2177 const char *fmt, ...);
2179 void gen6_set_pm_mask(struct drm_i915_private *dev_priv, u32 pm_iir,
2181 extern void intel_irq_init(struct drm_device *dev);
2182 extern void intel_hpd_init(struct drm_device *dev);
2184 extern void intel_uncore_sanitize(struct drm_device *dev);
2185 extern void intel_uncore_early_sanitize(struct drm_device *dev,
2186 bool restore_forcewake);
2187 extern void intel_uncore_init(struct drm_device *dev);
2188 extern void intel_uncore_check_errors(struct drm_device *dev);
2189 extern void intel_uncore_fini(struct drm_device *dev);
2190 extern void intel_uncore_forcewake_reset(struct drm_device *dev, bool restore);
2193 i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
2197 i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
2200 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv);
2201 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv);
2204 int i915_gem_init_ioctl(struct drm_device *dev, void *data,
2205 struct drm_file *file_priv);
2206 int i915_gem_create_ioctl(struct drm_device *dev, void *data,
2207 struct drm_file *file_priv);
2208 int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
2209 struct drm_file *file_priv);
2210 int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
2211 struct drm_file *file_priv);
2212 int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
2213 struct drm_file *file_priv);
2214 int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
2215 struct drm_file *file_priv);
2216 int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
2217 struct drm_file *file_priv);
2218 int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
2219 struct drm_file *file_priv);
2220 int i915_gem_execbuffer(struct drm_device *dev, void *data,
2221 struct drm_file *file_priv);
2222 int i915_gem_execbuffer2(struct drm_device *dev, void *data,
2223 struct drm_file *file_priv);
2224 int i915_gem_pin_ioctl(struct drm_device *dev, void *data,
2225 struct drm_file *file_priv);
2226 int i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
2227 struct drm_file *file_priv);
2228 int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
2229 struct drm_file *file_priv);
2230 int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
2231 struct drm_file *file);
2232 int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
2233 struct drm_file *file);
2234 int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
2235 struct drm_file *file_priv);
2236 int i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
2237 struct drm_file *file_priv);
2238 int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
2239 struct drm_file *file_priv);
2240 int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
2241 struct drm_file *file_priv);
2242 int i915_gem_set_tiling(struct drm_device *dev, void *data,
2243 struct drm_file *file_priv);
2244 int i915_gem_get_tiling(struct drm_device *dev, void *data,
2245 struct drm_file *file_priv);
2246 int i915_gem_init_userptr(struct drm_device *dev);
2247 int i915_gem_userptr_ioctl(struct drm_device *dev, void *data,
2248 struct drm_file *file);
2249 int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
2250 struct drm_file *file_priv);
2251 int i915_gem_wait_ioctl(struct drm_device *dev, void *data,
2252 struct drm_file *file_priv);
2253 void i915_gem_load(struct drm_device *dev);
2254 void *i915_gem_object_alloc(struct drm_device *dev);
2255 void i915_gem_object_free(struct drm_i915_gem_object *obj);
2256 void i915_gem_object_init(struct drm_i915_gem_object *obj,
2257 const struct drm_i915_gem_object_ops *ops);
2258 struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
2260 void i915_init_vm(struct drm_i915_private *dev_priv,
2261 struct i915_address_space *vm);
2262 void i915_gem_free_object(struct drm_gem_object *obj);
2263 void i915_gem_vma_destroy(struct i915_vma *vma);
2265 #define PIN_MAPPABLE 0x1
2266 #define PIN_NONBLOCK 0x2
2267 #define PIN_GLOBAL 0x4
2268 #define PIN_OFFSET_BIAS 0x8
2269 #define PIN_OFFSET_MASK (~4095)
2270 int __must_check i915_gem_object_pin(struct drm_i915_gem_object *obj,
2271 struct i915_address_space *vm,
2274 int __must_check i915_vma_unbind(struct i915_vma *vma);
2275 int i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
2276 void i915_gem_release_all_mmaps(struct drm_i915_private *dev_priv);
2277 void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
2278 void i915_gem_lastclose(struct drm_device *dev);
2280 int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
2281 int *needs_clflush);
2283 int __must_check i915_gem_object_get_pages(struct drm_i915_gem_object *obj);
2284 static inline struct page *i915_gem_object_get_page(struct drm_i915_gem_object *obj, int n)
2286 struct sg_page_iter sg_iter;
2288 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, n)
2289 return sg_page_iter_page(&sg_iter);
2293 static inline void i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
2295 BUG_ON(obj->pages == NULL);
2296 obj->pages_pin_count++;
2298 static inline void i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
2300 BUG_ON(obj->pages_pin_count == 0);
2301 obj->pages_pin_count--;
2304 int __must_check i915_mutex_lock_interruptible(struct drm_device *dev);
2305 int i915_gem_object_sync(struct drm_i915_gem_object *obj,
2306 struct intel_engine_cs *to);
2307 void i915_vma_move_to_active(struct i915_vma *vma,
2308 struct intel_engine_cs *ring);
2309 int i915_gem_dumb_create(struct drm_file *file_priv,
2310 struct drm_device *dev,
2311 struct drm_mode_create_dumb *args);
2312 int i915_gem_mmap_gtt(struct drm_file *file_priv, struct drm_device *dev,
2313 uint32_t handle, uint64_t *offset);
2315 * Returns true if seq1 is later than seq2.
2318 i915_seqno_passed(uint32_t seq1, uint32_t seq2)
2320 return (int32_t)(seq1 - seq2) >= 0;
2323 int __must_check i915_gem_get_seqno(struct drm_device *dev, u32 *seqno);
2324 int __must_check i915_gem_set_seqno(struct drm_device *dev, u32 seqno);
2325 int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
2326 int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
2328 bool i915_gem_object_pin_fence(struct drm_i915_gem_object *obj);
2329 void i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj);
2331 struct drm_i915_gem_request *
2332 i915_gem_find_active_request(struct intel_engine_cs *ring);
2334 bool i915_gem_retire_requests(struct drm_device *dev);
2335 void i915_gem_retire_requests_ring(struct intel_engine_cs *ring);
2336 int __must_check i915_gem_check_wedge(struct i915_gpu_error *error,
2337 bool interruptible);
2338 int __must_check i915_gem_check_olr(struct intel_engine_cs *ring, u32 seqno);
2340 static inline bool i915_reset_in_progress(struct i915_gpu_error *error)
2342 return unlikely(atomic_read(&error->reset_counter)
2343 & (I915_RESET_IN_PROGRESS_FLAG | I915_WEDGED));
2346 static inline bool i915_terminally_wedged(struct i915_gpu_error *error)
2348 return atomic_read(&error->reset_counter) & I915_WEDGED;
2351 static inline u32 i915_reset_count(struct i915_gpu_error *error)
2353 return ((atomic_read(&error->reset_counter) & ~I915_WEDGED) + 1) / 2;
2356 static inline bool i915_stop_ring_allow_ban(struct drm_i915_private *dev_priv)
2358 return dev_priv->gpu_error.stop_rings == 0 ||
2359 dev_priv->gpu_error.stop_rings & I915_STOP_RING_ALLOW_BAN;
2362 static inline bool i915_stop_ring_allow_warn(struct drm_i915_private *dev_priv)
2364 return dev_priv->gpu_error.stop_rings == 0 ||
2365 dev_priv->gpu_error.stop_rings & I915_STOP_RING_ALLOW_WARN;
2368 void i915_gem_reset(struct drm_device *dev);
2369 bool i915_gem_clflush_object(struct drm_i915_gem_object *obj, bool force);
2370 int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj);
2371 int __must_check i915_gem_init(struct drm_device *dev);
2372 int __must_check i915_gem_init_hw(struct drm_device *dev);
2373 int i915_gem_l3_remap(struct intel_engine_cs *ring, int slice);
2374 void i915_gem_init_swizzling(struct drm_device *dev);
2375 void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
2376 int __must_check i915_gpu_idle(struct drm_device *dev);
2377 int __must_check i915_gem_suspend(struct drm_device *dev);
2378 int __i915_add_request(struct intel_engine_cs *ring,
2379 struct drm_file *file,
2380 struct drm_i915_gem_object *batch_obj,
2382 #define i915_add_request(ring, seqno) \
2383 __i915_add_request(ring, NULL, NULL, seqno)
2384 int __must_check i915_wait_seqno(struct intel_engine_cs *ring,
2386 int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
2388 i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj,
2391 i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write);
2393 i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
2395 struct intel_engine_cs *pipelined);
2396 void i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj);
2397 int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
2399 int i915_gem_open(struct drm_device *dev, struct drm_file *file);
2400 void i915_gem_release(struct drm_device *dev, struct drm_file *file);
2403 i915_gem_get_gtt_size(struct drm_device *dev, uint32_t size, int tiling_mode);
2405 i915_gem_get_gtt_alignment(struct drm_device *dev, uint32_t size,
2406 int tiling_mode, bool fenced);
2408 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
2409 enum i915_cache_level cache_level);
2411 struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
2412 struct dma_buf *dma_buf);
2414 struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
2415 struct drm_gem_object *gem_obj, int flags);
2417 void i915_gem_restore_fences(struct drm_device *dev);
2419 unsigned long i915_gem_obj_offset(struct drm_i915_gem_object *o,
2420 struct i915_address_space *vm);
2421 bool i915_gem_obj_bound_any(struct drm_i915_gem_object *o);
2422 bool i915_gem_obj_bound(struct drm_i915_gem_object *o,
2423 struct i915_address_space *vm);
2424 unsigned long i915_gem_obj_size(struct drm_i915_gem_object *o,
2425 struct i915_address_space *vm);
2426 struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,
2427 struct i915_address_space *vm);
2429 i915_gem_obj_lookup_or_create_vma(struct drm_i915_gem_object *obj,
2430 struct i915_address_space *vm);
2432 struct i915_vma *i915_gem_obj_to_ggtt(struct drm_i915_gem_object *obj);
2433 static inline bool i915_gem_obj_is_pinned(struct drm_i915_gem_object *obj) {
2434 struct i915_vma *vma;
2435 list_for_each_entry(vma, &obj->vma_list, vma_link)
2436 if (vma->pin_count > 0)
2441 /* Some GGTT VM helpers */
2442 #define obj_to_ggtt(obj) \
2443 (&((struct drm_i915_private *)(obj)->base.dev->dev_private)->gtt.base)
2444 static inline bool i915_is_ggtt(struct i915_address_space *vm)
2446 struct i915_address_space *ggtt =
2447 &((struct drm_i915_private *)(vm)->dev->dev_private)->gtt.base;
2451 static inline bool i915_gem_obj_ggtt_bound(struct drm_i915_gem_object *obj)
2453 return i915_gem_obj_bound(obj, obj_to_ggtt(obj));
2456 static inline unsigned long
2457 i915_gem_obj_ggtt_offset(struct drm_i915_gem_object *obj)
2459 return i915_gem_obj_offset(obj, obj_to_ggtt(obj));
2462 static inline unsigned long
2463 i915_gem_obj_ggtt_size(struct drm_i915_gem_object *obj)
2465 return i915_gem_obj_size(obj, obj_to_ggtt(obj));
2468 static inline int __must_check
2469 i915_gem_obj_ggtt_pin(struct drm_i915_gem_object *obj,
2473 return i915_gem_object_pin(obj, obj_to_ggtt(obj), alignment, flags | PIN_GLOBAL);
2477 i915_gem_object_ggtt_unbind(struct drm_i915_gem_object *obj)
2479 return i915_vma_unbind(i915_gem_obj_to_ggtt(obj));
2482 void i915_gem_object_ggtt_unpin(struct drm_i915_gem_object *obj);
2484 /* i915_gem_context.c */
2485 #define ctx_to_ppgtt(ctx) container_of((ctx)->vm, struct i915_hw_ppgtt, base)
2486 int __must_check i915_gem_context_init(struct drm_device *dev);
2487 void i915_gem_context_fini(struct drm_device *dev);
2488 void i915_gem_context_reset(struct drm_device *dev);
2489 int i915_gem_context_open(struct drm_device *dev, struct drm_file *file);
2490 int i915_gem_context_enable(struct drm_i915_private *dev_priv);
2491 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
2492 int i915_switch_context(struct intel_engine_cs *ring,
2493 struct intel_context *to);
2494 struct intel_context *
2495 i915_gem_context_get(struct drm_i915_file_private *file_priv, u32 id);
2496 void i915_gem_context_free(struct kref *ctx_ref);
2497 static inline void i915_gem_context_reference(struct intel_context *ctx)
2499 kref_get(&ctx->ref);
2502 static inline void i915_gem_context_unreference(struct intel_context *ctx)
2504 kref_put(&ctx->ref, i915_gem_context_free);
2507 static inline bool i915_gem_context_is_default(const struct intel_context *c)
2509 return c->user_handle == DEFAULT_CONTEXT_HANDLE;
2512 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
2513 struct drm_file *file);
2514 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
2515 struct drm_file *file);
2517 /* i915_gem_render_state.c */
2518 int i915_gem_render_state_init(struct intel_engine_cs *ring);
2519 /* i915_gem_evict.c */
2520 int __must_check i915_gem_evict_something(struct drm_device *dev,
2521 struct i915_address_space *vm,
2524 unsigned cache_level,
2525 unsigned long start,
2528 int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle);
2529 int i915_gem_evict_everything(struct drm_device *dev);
2531 /* belongs in i915_gem_gtt.h */
2532 static inline void i915_gem_chipset_flush(struct drm_device *dev)
2534 if (INTEL_INFO(dev)->gen < 6)
2535 intel_gtt_chipset_flush();
2538 /* i915_gem_stolen.c */
2539 int i915_gem_init_stolen(struct drm_device *dev);
2540 int i915_gem_stolen_setup_compression(struct drm_device *dev, int size, int fb_cpp);
2541 void i915_gem_stolen_cleanup_compression(struct drm_device *dev);
2542 void i915_gem_cleanup_stolen(struct drm_device *dev);
2543 struct drm_i915_gem_object *
2544 i915_gem_object_create_stolen(struct drm_device *dev, u32 size);
2545 struct drm_i915_gem_object *
2546 i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
2551 /* i915_gem_tiling.c */
2552 static inline bool i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
2554 struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2556 return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
2557 obj->tiling_mode != I915_TILING_NONE;
2560 void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
2561 void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj);
2562 void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj);
2564 /* i915_gem_debug.c */
2566 int i915_verify_lists(struct drm_device *dev);
2568 #define i915_verify_lists(dev) 0
2571 /* i915_debugfs.c */
2572 int i915_debugfs_init(struct drm_minor *minor);
2573 void i915_debugfs_cleanup(struct drm_minor *minor);
2574 #ifdef CONFIG_DEBUG_FS
2575 void intel_display_crc_init(struct drm_device *dev);
2577 static inline void intel_display_crc_init(struct drm_device *dev) {}
2580 /* i915_gpu_error.c */
2582 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...);
2583 int i915_error_state_to_str(struct drm_i915_error_state_buf *estr,
2584 const struct i915_error_state_file_priv *error);
2585 int i915_error_state_buf_init(struct drm_i915_error_state_buf *eb,
2586 size_t count, loff_t pos);
2587 static inline void i915_error_state_buf_release(
2588 struct drm_i915_error_state_buf *eb)
2592 void i915_capture_error_state(struct drm_device *dev, bool wedge,
2593 const char *error_msg);
2594 void i915_error_state_get(struct drm_device *dev,
2595 struct i915_error_state_file_priv *error_priv);
2596 void i915_error_state_put(struct i915_error_state_file_priv *error_priv);
2597 void i915_destroy_error_state(struct drm_device *dev);
2599 void i915_get_extra_instdone(struct drm_device *dev, uint32_t *instdone);
2600 const char *i915_cache_level_str(int type);
2602 /* i915_cmd_parser.c */
2603 int i915_cmd_parser_get_version(void);
2604 int i915_cmd_parser_init_ring(struct intel_engine_cs *ring);
2605 void i915_cmd_parser_fini_ring(struct intel_engine_cs *ring);
2606 bool i915_needs_cmd_parser(struct intel_engine_cs *ring);
2607 int i915_parse_cmds(struct intel_engine_cs *ring,
2608 struct drm_i915_gem_object *batch_obj,
2609 u32 batch_start_offset,
2612 /* i915_suspend.c */
2613 extern int i915_save_state(struct drm_device *dev);
2614 extern int i915_restore_state(struct drm_device *dev);
2617 void i915_save_display_reg(struct drm_device *dev);
2618 void i915_restore_display_reg(struct drm_device *dev);
2621 void i915_setup_sysfs(struct drm_device *dev_priv);
2622 void i915_teardown_sysfs(struct drm_device *dev_priv);
2625 extern int intel_setup_gmbus(struct drm_device *dev);
2626 extern void intel_teardown_gmbus(struct drm_device *dev);
2627 static inline bool intel_gmbus_is_port_valid(unsigned port)
2629 return (port >= GMBUS_PORT_SSC && port <= GMBUS_PORT_DPD);
2632 extern struct i2c_adapter *intel_gmbus_get_adapter(
2633 struct drm_i915_private *dev_priv, unsigned port);
2634 extern void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
2635 extern void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
2636 static inline bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter)
2638 return container_of(adapter, struct intel_gmbus, adapter)->force_bit;
2640 extern void intel_i2c_reset(struct drm_device *dev);
2642 /* intel_opregion.c */
2643 struct intel_encoder;
2645 extern int intel_opregion_setup(struct drm_device *dev);
2646 extern void intel_opregion_init(struct drm_device *dev);
2647 extern void intel_opregion_fini(struct drm_device *dev);
2648 extern void intel_opregion_asle_intr(struct drm_device *dev);
2649 extern int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
2651 extern int intel_opregion_notify_adapter(struct drm_device *dev,
2654 static inline int intel_opregion_setup(struct drm_device *dev) { return 0; }
2655 static inline void intel_opregion_init(struct drm_device *dev) { return; }
2656 static inline void intel_opregion_fini(struct drm_device *dev) { return; }
2657 static inline void intel_opregion_asle_intr(struct drm_device *dev) { return; }
2659 intel_opregion_notify_encoder(struct intel_encoder *intel_encoder, bool enable)
2664 intel_opregion_notify_adapter(struct drm_device *dev, pci_power_t state)
2672 extern void intel_register_dsm_handler(void);
2673 extern void intel_unregister_dsm_handler(void);
2675 static inline void intel_register_dsm_handler(void) { return; }
2676 static inline void intel_unregister_dsm_handler(void) { return; }
2677 #endif /* CONFIG_ACPI */
2680 extern void intel_modeset_init_hw(struct drm_device *dev);
2681 extern void intel_modeset_suspend_hw(struct drm_device *dev);
2682 extern void intel_modeset_init(struct drm_device *dev);
2683 extern void intel_modeset_gem_init(struct drm_device *dev);
2684 extern void intel_modeset_cleanup(struct drm_device *dev);
2685 extern void intel_connector_unregister(struct intel_connector *);
2686 extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
2687 extern void intel_modeset_setup_hw_state(struct drm_device *dev,
2688 bool force_restore);
2689 extern void i915_redisable_vga(struct drm_device *dev);
2690 extern void i915_redisable_vga_power_on(struct drm_device *dev);
2691 extern bool intel_fbc_enabled(struct drm_device *dev);
2692 extern void intel_disable_fbc(struct drm_device *dev);
2693 extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
2694 extern void intel_init_pch_refclk(struct drm_device *dev);
2695 extern void gen6_set_rps(struct drm_device *dev, u8 val);
2696 extern void valleyview_set_rps(struct drm_device *dev, u8 val);
2697 extern void intel_set_memory_cxsr(struct drm_i915_private *dev_priv,
2699 extern void intel_detect_pch(struct drm_device *dev);
2700 extern int intel_trans_dp_port_sel(struct drm_crtc *crtc);
2701 extern int intel_enable_rc6(const struct drm_device *dev);
2703 extern bool i915_semaphore_is_enabled(struct drm_device *dev);
2704 int i915_reg_read_ioctl(struct drm_device *dev, void *data,
2705 struct drm_file *file);
2706 int i915_get_reset_stats_ioctl(struct drm_device *dev, void *data,
2707 struct drm_file *file);
2709 void intel_notify_mmio_flip(struct intel_engine_cs *ring);
2712 extern struct intel_overlay_error_state *intel_overlay_capture_error_state(struct drm_device *dev);
2713 extern void intel_overlay_print_error_state(struct drm_i915_error_state_buf *e,
2714 struct intel_overlay_error_state *error);
2716 extern struct intel_display_error_state *intel_display_capture_error_state(struct drm_device *dev);
2717 extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
2718 struct drm_device *dev,
2719 struct intel_display_error_state *error);
2721 /* On SNB platform, before reading ring registers forcewake bit
2722 * must be set to prevent GT core from power down and stale values being
2725 void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine);
2726 void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine);
2727 void assert_force_wake_inactive(struct drm_i915_private *dev_priv);
2729 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val);
2730 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val);
2732 /* intel_sideband.c */
2733 u32 vlv_punit_read(struct drm_i915_private *dev_priv, u8 addr);
2734 void vlv_punit_write(struct drm_i915_private *dev_priv, u8 addr, u32 val);
2735 u32 vlv_nc_read(struct drm_i915_private *dev_priv, u8 addr);
2736 u32 vlv_gpio_nc_read(struct drm_i915_private *dev_priv, u32 reg);
2737 void vlv_gpio_nc_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2738 u32 vlv_cck_read(struct drm_i915_private *dev_priv, u32 reg);
2739 void vlv_cck_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2740 u32 vlv_ccu_read(struct drm_i915_private *dev_priv, u32 reg);
2741 void vlv_ccu_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2742 u32 vlv_bunit_read(struct drm_i915_private *dev_priv, u32 reg);
2743 void vlv_bunit_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2744 u32 vlv_gps_core_read(struct drm_i915_private *dev_priv, u32 reg);
2745 void vlv_gps_core_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2746 u32 vlv_dpio_read(struct drm_i915_private *dev_priv, enum pipe pipe, int reg);
2747 void vlv_dpio_write(struct drm_i915_private *dev_priv, enum pipe pipe, int reg, u32 val);
2748 u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
2749 enum intel_sbi_destination destination);
2750 void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
2751 enum intel_sbi_destination destination);
2752 u32 vlv_flisdsi_read(struct drm_i915_private *dev_priv, u32 reg);
2753 void vlv_flisdsi_write(struct drm_i915_private *dev_priv, u32 reg, u32 val);
2755 int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val);
2756 int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val);
2758 #define FORCEWAKE_RENDER (1 << 0)
2759 #define FORCEWAKE_MEDIA (1 << 1)
2760 #define FORCEWAKE_ALL (FORCEWAKE_RENDER | FORCEWAKE_MEDIA)
2763 #define I915_READ8(reg) dev_priv->uncore.funcs.mmio_readb(dev_priv, (reg), true)
2764 #define I915_WRITE8(reg, val) dev_priv->uncore.funcs.mmio_writeb(dev_priv, (reg), (val), true)
2766 #define I915_READ16(reg) dev_priv->uncore.funcs.mmio_readw(dev_priv, (reg), true)
2767 #define I915_WRITE16(reg, val) dev_priv->uncore.funcs.mmio_writew(dev_priv, (reg), (val), true)
2768 #define I915_READ16_NOTRACE(reg) dev_priv->uncore.funcs.mmio_readw(dev_priv, (reg), false)
2769 #define I915_WRITE16_NOTRACE(reg, val) dev_priv->uncore.funcs.mmio_writew(dev_priv, (reg), (val), false)
2771 #define I915_READ(reg) dev_priv->uncore.funcs.mmio_readl(dev_priv, (reg), true)
2772 #define I915_WRITE(reg, val) dev_priv->uncore.funcs.mmio_writel(dev_priv, (reg), (val), true)
2773 #define I915_READ_NOTRACE(reg) dev_priv->uncore.funcs.mmio_readl(dev_priv, (reg), false)
2774 #define I915_WRITE_NOTRACE(reg, val) dev_priv->uncore.funcs.mmio_writel(dev_priv, (reg), (val), false)
2776 /* Be very careful with read/write 64-bit values. On 32-bit machines, they
2777 * will be implemented using 2 32-bit writes in an arbitrary order with
2778 * an arbitrary delay between them. This can cause the hardware to
2779 * act upon the intermediate value, possibly leading to corruption and
2780 * machine death. You have been warned.
2782 #define I915_WRITE64(reg, val) dev_priv->uncore.funcs.mmio_writeq(dev_priv, (reg), (val), true)
2783 #define I915_READ64(reg) dev_priv->uncore.funcs.mmio_readq(dev_priv, (reg), true)
2785 #define I915_READ64_2x32(lower_reg, upper_reg) ({ \
2786 u32 upper = I915_READ(upper_reg); \
2787 u32 lower = I915_READ(lower_reg); \
2788 u32 tmp = I915_READ(upper_reg); \
2789 if (upper != tmp) { \
2791 lower = I915_READ(lower_reg); \
2792 WARN_ON(I915_READ(upper_reg) != upper); \
2794 (u64)upper << 32 | lower; })
2796 #define POSTING_READ(reg) (void)I915_READ_NOTRACE(reg)
2797 #define POSTING_READ16(reg) (void)I915_READ16_NOTRACE(reg)
2799 /* "Broadcast RGB" property */
2800 #define INTEL_BROADCAST_RGB_AUTO 0
2801 #define INTEL_BROADCAST_RGB_FULL 1
2802 #define INTEL_BROADCAST_RGB_LIMITED 2
2804 static inline uint32_t i915_vgacntrl_reg(struct drm_device *dev)
2806 if (IS_VALLEYVIEW(dev))
2807 return VLV_VGACNTRL;
2808 else if (INTEL_INFO(dev)->gen >= 5)
2809 return CPU_VGACNTRL;
2814 static inline void __user *to_user_ptr(u64 address)
2816 return (void __user *)(uintptr_t)address;
2819 static inline unsigned long msecs_to_jiffies_timeout(const unsigned int m)
2821 unsigned long j = msecs_to_jiffies(m);
2823 return min_t(unsigned long, MAX_JIFFY_OFFSET, j + 1);
2826 static inline unsigned long
2827 timespec_to_jiffies_timeout(const struct timespec *value)
2829 unsigned long j = timespec_to_jiffies(value);
2831 return min_t(unsigned long, MAX_JIFFY_OFFSET, j + 1);
2835 * If you need to wait X milliseconds between events A and B, but event B
2836 * doesn't happen exactly after event A, you record the timestamp (jiffies) of
2837 * when event A happened, then just before event B you call this function and
2838 * pass the timestamp as the first argument, and X as the second argument.
2841 wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms)
2843 unsigned long target_jiffies, tmp_jiffies, remaining_jiffies;
2846 * Don't re-read the value of "jiffies" every time since it may change
2847 * behind our back and break the math.
2849 tmp_jiffies = jiffies;
2850 target_jiffies = timestamp_jiffies +
2851 msecs_to_jiffies_timeout(to_wait_ms);
2853 if (time_after(target_jiffies, tmp_jiffies)) {
2854 remaining_jiffies = target_jiffies - tmp_jiffies;
2855 while (remaining_jiffies)
2857 schedule_timeout_uninterruptible(remaining_jiffies);