[linux-2.6-microblaze.git] / drivers / gpu / drm / i915 / i915_drv.h

/* i915_drv.h -- Private header for the I915 driver -*- linux-c -*-
 */
/*
 *
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#ifndef _I915_DRV_H_
#define _I915_DRV_H_

#include <uapi/drm/i915_drm.h>
#include <uapi/drm/drm_fourcc.h>

#include <linux/io-mapping.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/backlight.h>
#include <linux/hash.h>
#include <linux/intel-iommu.h>
#include <linux/kref.h>
#include <linux/mm_types.h>
#include <linux/perf_event.h>
#include <linux/pm_qos.h>
#include <linux/reservation.h>
#include <linux/shmem_fs.h>
#include <linux/stackdepot.h>

#include <drm/intel-gtt.h>
#include <drm/drm_legacy.h> /* for struct drm_dma_handle */
#include <drm/drm_gem.h>
#include <drm/drm_auth.h>
#include <drm/drm_cache.h>
#include <drm/drm_util.h>
#include <drm/drm_dsc.h>
#include <drm/drm_connector.h>
#include <drm/i915_mei_hdcp_interface.h>

#include "i915_fixed.h"
#include "i915_params.h"
#include "i915_reg.h"
#include "i915_utils.h"

#include "gt/intel_lrc.h"
#include "gt/intel_engine.h"
#include "gt/intel_workarounds.h"

#include "intel_bios.h"
#include "intel_device_info.h"
#include "intel_display.h"
#include "intel_dpll_mgr.h"
#include "intel_frontbuffer.h"
#include "intel_opregion.h"
#include "intel_runtime_pm.h"
#include "intel_uc.h"
#include "intel_uncore.h"
#include "intel_wakeref.h"
#include "intel_wopcm.h"

#include "i915_gem.h"
#include "i915_gem_context.h"
#include "i915_gem_fence_reg.h"
#include "i915_gem_object.h"
#include "i915_gem_gtt.h"
#include "i915_gpu_error.h"
#include "i915_request.h"
#include "i915_scheduler.h"
#include "i915_timeline.h"
#include "i915_vma.h"

#include "intel_gvt.h"

/* General customization:
 */

#define DRIVER_NAME             "i915"
#define DRIVER_DESC             "Intel Graphics"
#define DRIVER_DATE             "20190417"
#define DRIVER_TIMESTAMP        1555492067

/* Use I915_STATE_WARN(x) and I915_STATE_WARN_ON() (rather than WARN() and
 * WARN_ON()) for hw state sanity checks to check for unexpected conditions
 * which may not necessarily be a user visible problem.  This will either
 * WARN() or DRM_ERROR() depending on the verbose_checks moduleparam, to
 * enable distros and users to tailor their preferred amount of i915 abrt
 * spam.
 */
#define I915_STATE_WARN(condition, format...) ({                        \
        int __ret_warn_on = !!(condition);                              \
        if (unlikely(__ret_warn_on))                                    \
                if (!WARN(i915_modparams.verbose_state_checks, format)) \
                        DRM_ERROR(format);                              \
        unlikely(__ret_warn_on);                                        \
})

#define I915_STATE_WARN_ON(x)                                           \
        I915_STATE_WARN((x), "%s", "WARN_ON(" __stringify(x) ")")

#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)

bool __i915_inject_load_failure(const char *func, int line);
#define i915_inject_load_failure() \
        __i915_inject_load_failure(__func__, __LINE__)

bool i915_error_injected(void);

#else

#define i915_inject_load_failure() false
#define i915_error_injected() false

#endif

#define i915_load_error(i915, fmt, ...)                                  \
        __i915_printk(i915, i915_error_injected() ? KERN_DEBUG : KERN_ERR, \
                      fmt, ##__VA_ARGS__)

enum hpd_pin {
        HPD_NONE = 0,
        HPD_TV = HPD_NONE,     /* TV is known to be unreliable */
        HPD_CRT,
        HPD_SDVO_B,
        HPD_SDVO_C,
        HPD_PORT_A,
        HPD_PORT_B,
        HPD_PORT_C,
        HPD_PORT_D,
        HPD_PORT_E,
        HPD_PORT_F,
        HPD_NUM_PINS
};

#define for_each_hpd_pin(__pin) \
        for ((__pin) = (HPD_NONE + 1); (__pin) < HPD_NUM_PINS; (__pin)++)

/* Threshold == 5 for long IRQs, 50 for short */
#define HPD_STORM_DEFAULT_THRESHOLD 50

struct i915_hotplug {
        struct work_struct hotplug_work;

        struct {
                unsigned long last_jiffies;
                int count;
                enum {
                        HPD_ENABLED = 0,
                        HPD_DISABLED = 1,
                        HPD_MARK_DISABLED = 2
                } state;
        } stats[HPD_NUM_PINS];
        u32 event_bits;
        struct delayed_work reenable_work;

        u32 long_port_mask;
        u32 short_port_mask;
        struct work_struct dig_port_work;

        struct work_struct poll_init_work;
        bool poll_enabled;

        unsigned int hpd_storm_threshold;
        /* Whether or not to count short HPD IRQs in HPD storms */
        u8 hpd_short_storm_enabled;

        /*
         * if we get a HPD irq from DP and a HPD irq from non-DP
         * the non-DP HPD could block the workqueue on a mode config
         * mutex getting, that userspace may have taken. However
         * userspace is waiting on the DP workqueue to run which is
         * blocked behind the non-DP one.
         */
        struct workqueue_struct *dp_wq;
};

#define I915_GEM_GPU_DOMAINS \
        (I915_GEM_DOMAIN_RENDER | \
         I915_GEM_DOMAIN_SAMPLER | \
         I915_GEM_DOMAIN_COMMAND | \
         I915_GEM_DOMAIN_INSTRUCTION | \
         I915_GEM_DOMAIN_VERTEX)

struct drm_i915_private;
struct i915_mm_struct;
struct i915_mmu_object;

struct drm_i915_file_private {
        struct drm_i915_private *dev_priv;
        struct drm_file *file;

        struct {
                spinlock_t lock;
                struct list_head request_list;
/* 20ms is a fairly arbitrary limit (greater than the average frame time)
 * chosen to prevent the CPU getting more than a frame ahead of the GPU
 * (when using lax throttling for the frontbuffer). We also use it to
 * offer free GPU waitboosts for severely congested workloads.
 */
#define DRM_I915_THROTTLE_JIFFIES msecs_to_jiffies(20)
        } mm;

        struct idr context_idr;
        struct mutex context_idr_lock; /* guards context_idr */

        struct idr vm_idr;
        struct mutex vm_idr_lock; /* guards vm_idr */

        unsigned int bsd_engine;

/*
 * Every context ban increments per client ban score. Also
 * hangs in short succession increments ban score. If ban threshold
 * is reached, client is considered banned and submitting more work
 * will fail. This is a stop gap measure to limit the badly behaving
 * clients access to gpu. Note that unbannable contexts never increment
 * the client ban score.
 */
#define I915_CLIENT_SCORE_HANG_FAST     1
#define   I915_CLIENT_FAST_HANG_JIFFIES (60 * HZ)
#define I915_CLIENT_SCORE_CONTEXT_BAN   3
#define I915_CLIENT_SCORE_BANNED        9
        /** ban_score: Accumulated score of all ctx bans and fast hangs. */
        atomic_t ban_score;
        unsigned long hang_timestamp;
};

/* Interface history:
 *
 * 1.1: Original.
 * 1.2: Add Power Management
 * 1.3: Add vblank support
 * 1.4: Fix cmdbuffer path, add heap destroy
 * 1.5: Add vblank pipe configuration
 * 1.6: - New ioctl for scheduling buffer swaps on vertical blank
 *      - Support vertical blank on secondary display pipe
 */
#define DRIVER_MAJOR            1
#define DRIVER_MINOR            6
#define DRIVER_PATCHLEVEL       0

struct intel_overlay;
struct intel_overlay_error_state;

struct sdvo_device_mapping {
        u8 initialized;
        u8 dvo_port;
        u8 slave_addr;
        u8 dvo_wiring;
        u8 i2c_pin;
        u8 ddc_pin;
};

struct intel_connector;
struct intel_encoder;
struct intel_atomic_state;
struct intel_crtc_state;
struct intel_initial_plane_config;
struct intel_crtc;
struct intel_limit;
struct dpll;
struct intel_cdclk_state;

struct drm_i915_display_funcs {
        void (*get_cdclk)(struct drm_i915_private *dev_priv,
                          struct intel_cdclk_state *cdclk_state);
        void (*set_cdclk)(struct drm_i915_private *dev_priv,
                          const struct intel_cdclk_state *cdclk_state,
                          enum pipe pipe);
        int (*get_fifo_size)(struct drm_i915_private *dev_priv,
                             enum i9xx_plane_id i9xx_plane);
        int (*compute_pipe_wm)(struct intel_crtc_state *cstate);
        int (*compute_intermediate_wm)(struct intel_crtc_state *newstate);
        void (*initial_watermarks)(struct intel_atomic_state *state,
                                   struct intel_crtc_state *cstate);
        void (*atomic_update_watermarks)(struct intel_atomic_state *state,
                                         struct intel_crtc_state *cstate);
        void (*optimize_watermarks)(struct intel_atomic_state *state,
                                    struct intel_crtc_state *cstate);
        int (*compute_global_watermarks)(struct intel_atomic_state *state);
        void (*update_wm)(struct intel_crtc *crtc);
        int (*modeset_calc_cdclk)(struct drm_atomic_state *state);
        /* Returns the active state of the crtc, and if the crtc is active,
         * fills out the pipe-config with the hw state. */
        bool (*get_pipe_config)(struct intel_crtc *,
                                struct intel_crtc_state *);
        void (*get_initial_plane_config)(struct intel_crtc *,
                                         struct intel_initial_plane_config *);
        int (*crtc_compute_clock)(struct intel_crtc *crtc,
                                  struct intel_crtc_state *crtc_state);
        void (*crtc_enable)(struct intel_crtc_state *pipe_config,
                            struct drm_atomic_state *old_state);
        void (*crtc_disable)(struct intel_crtc_state *old_crtc_state,
                             struct drm_atomic_state *old_state);
        void (*update_crtcs)(struct drm_atomic_state *state);
        void (*audio_codec_enable)(struct intel_encoder *encoder,
                                   const struct intel_crtc_state *crtc_state,
                                   const struct drm_connector_state *conn_state);
        void (*audio_codec_disable)(struct intel_encoder *encoder,
                                    const struct intel_crtc_state *old_crtc_state,
                                    const struct drm_connector_state *old_conn_state);
        void (*fdi_link_train)(struct intel_crtc *crtc,
                               const struct intel_crtc_state *crtc_state);
        void (*init_clock_gating)(struct drm_i915_private *dev_priv);
        void (*hpd_irq_setup)(struct drm_i915_private *dev_priv);
        /* clock updates for mode set */
        /* cursor updates */
        /* render clock increase/decrease */
        /* display clock increase/decrease */
        /* pll clock increase/decrease */

        int (*color_check)(struct intel_crtc_state *crtc_state);
        /*
         * Program double buffered color management registers during
         * vblank evasion. The registers should then latch during the
         * next vblank start, alongside any other double buffered registers
         * involved with the same commit.
         */
        void (*color_commit)(const struct intel_crtc_state *crtc_state);
        /*
         * Load LUTs (and other single buffered color management
         * registers). Will (hopefully) be called during the vblank
         * following the latching of any double buffered registers
         * involved with the same commit.
         */
        void (*load_luts)(const struct intel_crtc_state *crtc_state);
};

struct intel_csr {
        struct work_struct work;
        const char *fw_path;
        u32 required_version;
        u32 max_fw_size; /* bytes */
        u32 *dmc_payload;
        u32 dmc_fw_size; /* dwords */
        u32 version;
        u32 mmio_count;
        i915_reg_t mmioaddr[8];
        u32 mmiodata[8];
        u32 dc_state;
        u32 allowed_dc_mask;
        intel_wakeref_t wakeref;
};

enum i915_cache_level {
        I915_CACHE_NONE = 0,
        I915_CACHE_LLC, /* also used for snoopable memory on non-LLC */
        I915_CACHE_L3_LLC, /* gen7+, L3 sits between the domain specifc
                              caches, eg sampler/render caches, and the
                              large Last-Level-Cache. LLC is coherent with
                              the CPU, but L3 is only visible to the GPU. */
        I915_CACHE_WT, /* hsw:gt3e WriteThrough for scanouts */
};

#define I915_COLOR_UNEVICTABLE (-1) /* a non-vma sharing the address space */

struct intel_fbc {
        /* This is always the inner lock when overlapping with struct_mutex and
         * it's the outer lock when overlapping with stolen_lock. */
        struct mutex lock;
        unsigned threshold;
        unsigned int possible_framebuffer_bits;
        unsigned int busy_bits;
        unsigned int visible_pipes_mask;
        struct intel_crtc *crtc;

        struct drm_mm_node compressed_fb;
        struct drm_mm_node *compressed_llb;

        bool false_color;

        bool enabled;
        bool active;
        bool flip_pending;

        bool underrun_detected;
        struct work_struct underrun_work;

        /*
         * Due to the atomic rules we can't access some structures without the
         * appropriate locking, so we cache information here in order to avoid
         * these problems.
         */
        struct intel_fbc_state_cache {
                struct i915_vma *vma;
                unsigned long flags;

                struct {
                        unsigned int mode_flags;
                        u32 hsw_bdw_pixel_rate;
                } crtc;

                struct {
                        unsigned int rotation;
                        int src_w;
                        int src_h;
                        bool visible;
                        /*
                         * Display surface base address adjustement for
                         * pageflips. Note that on gen4+ this only adjusts up
                         * to a tile, offsets within a tile are handled in
                         * the hw itself (with the TILEOFF register).
                         */
                        int adjusted_x;
                        int adjusted_y;

                        int y;

                        u16 pixel_blend_mode;
                } plane;

                struct {
                        const struct drm_format_info *format;
                        unsigned int stride;
                } fb;
        } state_cache;

        /*
         * This structure contains everything that's relevant to program the
         * hardware registers. When we want to figure out if we need to disable
         * and re-enable FBC for a new configuration we just check if there's
         * something different in the struct. The genx_fbc_activate functions
         * are supposed to read from it in order to program the registers.
         */
        struct intel_fbc_reg_params {
                struct i915_vma *vma;
                unsigned long flags;

                struct {
                        enum pipe pipe;
                        enum i9xx_plane_id i9xx_plane;
                        unsigned int fence_y_offset;
                } crtc;

                struct {
                        const struct drm_format_info *format;
                        unsigned int stride;
                } fb;

                int cfb_size;
                unsigned int gen9_wa_cfb_stride;
        } params;

        const char *no_fbc_reason;
};

/*
 * HIGH_RR is the highest eDP panel refresh rate read from EDID
 * LOW_RR is the lowest eDP panel refresh rate found from EDID
 * parsing for same resolution.
 */
enum drrs_refresh_rate_type {
        DRRS_HIGH_RR,
        DRRS_LOW_RR,
        DRRS_MAX_RR, /* RR count */
};

enum drrs_support_type {
        DRRS_NOT_SUPPORTED = 0,
        STATIC_DRRS_SUPPORT = 1,
        SEAMLESS_DRRS_SUPPORT = 2
};

struct intel_dp;
struct i915_drrs {
        struct mutex mutex;
        struct delayed_work work;
        struct intel_dp *dp;
        unsigned busy_frontbuffer_bits;
        enum drrs_refresh_rate_type refresh_rate_type;
        enum drrs_support_type type;
};

struct i915_psr {
        struct mutex lock;

#define I915_PSR_DEBUG_MODE_MASK        0x0f
#define I915_PSR_DEBUG_DEFAULT          0x00
#define I915_PSR_DEBUG_DISABLE          0x01
#define I915_PSR_DEBUG_ENABLE           0x02
#define I915_PSR_DEBUG_FORCE_PSR1       0x03
#define I915_PSR_DEBUG_IRQ              0x10

        u32 debug;
        bool sink_support;
        bool enabled;
        struct intel_dp *dp;
        enum pipe pipe;
        bool active;
        struct work_struct work;
        unsigned busy_frontbuffer_bits;
        bool sink_psr2_support;
        bool link_standby;
        bool colorimetry_support;
        bool psr2_enabled;
        u8 sink_sync_latency;
        ktime_t last_entry_attempt;
        ktime_t last_exit;
        bool sink_not_reliable;
        bool irq_aux_error;
        u16 su_x_granularity;
};

/*
 * Sorted by south display engine compatibility.
 * If the new PCH comes with a south display engine that is not
 * inherited from the latest item, please do not add it to the
 * end. Instead, add it right after its "parent" PCH.
 */
enum intel_pch {
        PCH_NOP = -1,   /* PCH without south display */
        PCH_NONE = 0,   /* No PCH present */
        PCH_IBX,        /* Ibexpeak PCH */
        PCH_CPT,        /* Cougarpoint/Pantherpoint PCH */
        PCH_LPT,        /* Lynxpoint/Wildcatpoint PCH */
        PCH_SPT,        /* Sunrisepoint/Kaby Lake PCH */
        PCH_CNP,        /* Cannon/Comet Lake PCH */
        PCH_ICP,        /* Ice Lake PCH */
};

#define QUIRK_LVDS_SSC_DISABLE (1<<1)
#define QUIRK_INVERT_BRIGHTNESS (1<<2)
#define QUIRK_BACKLIGHT_PRESENT (1<<3)
#define QUIRK_PIN_SWIZZLED_PAGES (1<<5)
#define QUIRK_INCREASE_T12_DELAY (1<<6)
#define QUIRK_INCREASE_DDI_DISABLED_TIME (1<<7)

struct intel_fbdev;
struct intel_fbc_work;

struct intel_gmbus {
        struct i2c_adapter adapter;
#define GMBUS_FORCE_BIT_RETRY (1U << 31)
        u32 force_bit;
        u32 reg0;
        i915_reg_t gpio_reg;
        struct i2c_algo_bit_data bit_algo;
        struct drm_i915_private *dev_priv;
};

struct i915_suspend_saved_registers {
        u32 saveDSPARB;
        u32 saveFBC_CONTROL;
        u32 saveCACHE_MODE_0;
        u32 saveMI_ARB_STATE;
        u32 saveSWF0[16];
        u32 saveSWF1[16];
        u32 saveSWF3[3];
        u64 saveFENCE[I915_MAX_NUM_FENCES];
        u32 savePCH_PORT_HOTPLUG;
        u16 saveGCDGMBUS;
};

struct vlv_s0ix_state {
        /* GAM */
        u32 wr_watermark;
        u32 gfx_prio_ctrl;
        u32 arb_mode;
        u32 gfx_pend_tlb0;
        u32 gfx_pend_tlb1;
        u32 lra_limits[GEN7_LRA_LIMITS_REG_NUM];
        u32 media_max_req_count;
        u32 gfx_max_req_count;
        u32 render_hwsp;
        u32 ecochk;
        u32 bsd_hwsp;
        u32 blt_hwsp;
        u32 tlb_rd_addr;

        /* MBC */
        u32 g3dctl;
        u32 gsckgctl;
        u32 mbctl;

        /* GCP */
        u32 ucgctl1;
        u32 ucgctl3;
        u32 rcgctl1;
        u32 rcgctl2;
        u32 rstctl;
        u32 misccpctl;

        /* GPM */
        u32 gfxpause;
        u32 rpdeuhwtc;
        u32 rpdeuc;
        u32 ecobus;
        u32 pwrdwnupctl;
        u32 rp_down_timeout;
        u32 rp_deucsw;
        u32 rcubmabdtmr;
        u32 rcedata;
        u32 spare2gh;

        /* Display 1 CZ domain */
        u32 gt_imr;
        u32 gt_ier;
        u32 pm_imr;
        u32 pm_ier;
        u32 gt_scratch[GEN7_GT_SCRATCH_REG_NUM];

        /* GT SA CZ domain */
        u32 tilectl;
        u32 gt_fifoctl;
        u32 gtlc_wake_ctrl;
        u32 gtlc_survive;
        u32 pmwgicz;

        /* Display 2 CZ domain */
        u32 gu_ctl0;
        u32 gu_ctl1;
        u32 pcbr;
        u32 clock_gate_dis2;
};

struct intel_rps_ei {
        ktime_t ktime;
        u32 render_c0;
        u32 media_c0;
};

struct intel_rps {
        struct mutex lock; /* protects enabling and the worker */

        /*
         * work, interrupts_enabled and pm_iir are protected by
         * dev_priv->irq_lock
         */
        struct work_struct work;
        bool interrupts_enabled;
        u32 pm_iir;

        /* PM interrupt bits that should never be masked */
        u32 pm_intrmsk_mbz;

        /* Frequencies are stored in potentially platform dependent multiples.
         * In other words, *_freq needs to be multiplied by X to be interesting.
         * Soft limits are those which are used for the dynamic reclocking done
         * by the driver (raise frequencies under heavy loads, and lower for
         * lighter loads). Hard limits are those imposed by the hardware.
         *
         * A distinction is made for overclocking, which is never enabled by
         * default, and is considered to be above the hard limit if it's
         * possible at all.
         */
        u8 cur_freq;            /* Current frequency (cached, may not == HW) */
        u8 min_freq_softlimit;  /* Minimum frequency permitted by the driver */
        u8 max_freq_softlimit;  /* Max frequency permitted by the driver */
        u8 max_freq;            /* Maximum frequency, RP0 if not overclocking */
        u8 min_freq;            /* AKA RPn. Minimum frequency */
        u8 boost_freq;          /* Frequency to request when wait boosting */
        u8 idle_freq;           /* Frequency to request when we are idle */
        u8 efficient_freq;      /* AKA RPe. Pre-determined balanced frequency */
        u8 rp1_freq;            /* "less than" RP0 power/freqency */
        u8 rp0_freq;            /* Non-overclocked max frequency. */
        u16 gpll_ref_freq;      /* vlv/chv GPLL reference frequency */

        int last_adj;

        struct {
                struct mutex mutex;

                enum { LOW_POWER, BETWEEN, HIGH_POWER } mode;
                unsigned int interactive;

                u8 up_threshold; /* Current %busy required to uplock */
                u8 down_threshold; /* Current %busy required to downclock */
        } power;

        bool enabled;
        atomic_t num_waiters;
        atomic_t boosts;

        /* manual wa residency calculations */
        struct intel_rps_ei ei;
};

struct intel_rc6 {
        bool enabled;
        u64 prev_hw_residency[4];
        u64 cur_residency[4];
};

struct intel_llc_pstate {
        bool enabled;
};

struct intel_gen6_power_mgmt {
        struct intel_rps rps;
        struct intel_rc6 rc6;
        struct intel_llc_pstate llc_pstate;
};

/* defined intel_pm.c */
extern spinlock_t mchdev_lock;

struct intel_ilk_power_mgmt {
        u8 cur_delay;
        u8 min_delay;
        u8 max_delay;
        u8 fmax;
        u8 fstart;

        u64 last_count1;
        unsigned long last_time1;
        unsigned long chipset_power;
        u64 last_count2;
        u64 last_time2;
        unsigned long gfx_power;
        u8 corr;

        int c_m;
        int r_t;
};

struct drm_i915_private;
struct i915_power_well;

struct i915_power_well_ops {
        /*
         * Synchronize the well's hw state to match the current sw state, for
         * example enable/disable it based on the current refcount. Called
         * during driver init and resume time, possibly after first calling
         * the enable/disable handlers.
         */
        void (*sync_hw)(struct drm_i915_private *dev_priv,
                        struct i915_power_well *power_well);
        /*
         * Enable the well and resources that depend on it (for example
         * interrupts located on the well). Called after the 0->1 refcount
         * transition.
         */
        void (*enable)(struct drm_i915_private *dev_priv,
                       struct i915_power_well *power_well);
        /*
         * Disable the well and resources that depend on it. Called after
         * the 1->0 refcount transition.
         */
        void (*disable)(struct drm_i915_private *dev_priv,
                        struct i915_power_well *power_well);
        /* Returns the hw enabled state. */
        bool (*is_enabled)(struct drm_i915_private *dev_priv,
                           struct i915_power_well *power_well);
};

struct i915_power_well_regs {
        i915_reg_t bios;
        i915_reg_t driver;
        i915_reg_t kvmr;
        i915_reg_t debug;
};

/* Power well structure for haswell */
struct i915_power_well_desc {
        const char *name;
        bool always_on;
        u64 domains;
        /* unique identifier for this power well */
        enum i915_power_well_id id;
        /*
         * Arbitraty data associated with this power well. Platform and power
         * well specific.
         */
        union {
                struct {
                        /*
                         * request/status flag index in the PUNIT power well
                         * control/status registers.
                         */
                        u8 idx;
                } vlv;
                struct {
                        enum dpio_phy phy;
                } bxt;
                struct {
                        const struct i915_power_well_regs *regs;
                        /*
                         * request/status flag index in the power well
                         * constrol/status registers.
                         */
                        u8 idx;
                        /* Mask of pipes whose IRQ logic is backed by the pw */
                        u8 irq_pipe_mask;
                        /* The pw is backing the VGA functionality */
                        bool has_vga:1;
                        bool has_fuses:1;
                        /*
                         * The pw is for an ICL+ TypeC PHY port in
                         * Thunderbolt mode.
                         */
                        bool is_tc_tbt:1;
                } hsw;
        };
        const struct i915_power_well_ops *ops;
};

struct i915_power_well {
        const struct i915_power_well_desc *desc;
        /* power well enable/disable usage count */
        int count;
        /* cached hw enabled state */
        bool hw_enabled;
};

struct i915_power_domains {
        /*
         * Power wells needed for initialization at driver init and suspend
         * time are on. They are kept on until after the first modeset.
         */
        bool initializing;
        bool display_core_suspended;
        int power_well_count;

        intel_wakeref_t wakeref;

        struct mutex lock;
        int domain_use_count[POWER_DOMAIN_NUM];
        struct i915_power_well *power_wells;
};

#define MAX_L3_SLICES 2
struct intel_l3_parity {
        u32 *remap_info[MAX_L3_SLICES];
        struct work_struct error_work;
        int which_slice;
};

struct i915_gem_mm {
        /** Memory allocator for GTT stolen memory */
        struct drm_mm stolen;
        /** Protects the usage of the GTT stolen memory allocator. This is
         * always the inner lock when overlapping with struct_mutex. */
        struct mutex stolen_lock;

        /* Protects bound_list/unbound_list and #drm_i915_gem_object.mm.link */
        spinlock_t obj_lock;

        /** List of all objects in gtt_space. Used to restore gtt
         * mappings on resume */
        struct list_head bound_list;
        /**
         * List of objects which are not bound to the GTT (thus
         * are idle and not used by the GPU). These objects may or may
         * not actually have any pages attached.
         */
        struct list_head unbound_list;

        /** List of all objects in gtt_space, currently mmaped by userspace.
         * All objects within this list must also be on bound_list.
         */
        struct list_head userfault_list;

        /**
         * List of objects which are pending destruction.
         */
        struct llist_head free_list;
        struct work_struct free_work;
        spinlock_t free_lock;
        /**
         * Count of objects pending destructions. Used to skip needlessly
         * waiting on an RCU barrier if no objects are waiting to be freed.
         */
        atomic_t free_count;

        /**
         * Small stash of WC pages
         */
        struct pagestash wc_stash;

        /**
         * tmpfs instance used for shmem backed objects
         */
        struct vfsmount *gemfs;

        /** PPGTT used for aliasing the PPGTT with the GTT */
        struct i915_hw_ppgtt *aliasing_ppgtt;

        struct notifier_block oom_notifier;
        struct notifier_block vmap_notifier;
        struct shrinker shrinker;

        /** LRU list of objects with fence regs on them. */
        struct list_head fence_list;

        /**
         * Workqueue to fault in userptr pages, flushed by the execbuf
         * when required but otherwise left to userspace to try again
         * on EAGAIN.
         */
        struct workqueue_struct *userptr_wq;

        u64 unordered_timeline;

        /* the indicator for dispatch video commands on two BSD rings */
        atomic_t bsd_engine_dispatch_index;

        /** Bit 6 swizzling required for X tiling */
        u32 bit_6_swizzle_x;
        /** Bit 6 swizzling required for Y tiling */
        u32 bit_6_swizzle_y;

        /* accounting, useful for userland debugging */
        spinlock_t object_stat_lock;
        u64 object_memory;
        u32 object_count;
};

#define I915_IDLE_ENGINES_TIMEOUT (200) /* in ms */

#define I915_RESET_TIMEOUT (10 * HZ) /* 10s */
#define I915_FENCE_TIMEOUT (10 * HZ) /* 10s */

#define I915_ENGINE_DEAD_TIMEOUT  (4 * HZ)  /* Seqno, head and subunits dead */
#define I915_SEQNO_DEAD_TIMEOUT   (12 * HZ) /* Seqno dead with active head */

#define I915_ENGINE_WEDGED_TIMEOUT  (60 * HZ)  /* Reset but no recovery? */

struct ddi_vbt_port_info {
        int max_tmds_clock;

        /*
         * This is an index in the HDMI/DVI DDI buffer translation table.
         * The special value HDMI_LEVEL_SHIFT_UNKNOWN means the VBT didn't
         * populate this field.
         */
#define HDMI_LEVEL_SHIFT_UNKNOWN        0xff
        u8 hdmi_level_shift;

        u8 present:1;
        u8 supports_dvi:1;
        u8 supports_hdmi:1;
        u8 supports_dp:1;
        u8 supports_edp:1;
        u8 supports_typec_usb:1;
        u8 supports_tbt:1;

        u8 alternate_aux_channel;
        u8 alternate_ddc_pin;

        u8 dp_boost_level;
        u8 hdmi_boost_level;
        int dp_max_link_rate;           /* 0 for not limited by VBT */
};

enum psr_lines_to_wait {
        PSR_0_LINES_TO_WAIT = 0,
        PSR_1_LINE_TO_WAIT,
        PSR_4_LINES_TO_WAIT,
        PSR_8_LINES_TO_WAIT
};

struct intel_vbt_data {
        struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */
        struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */

        /* Feature bits */
        unsigned int int_tv_support:1;
        unsigned int lvds_dither:1;
        unsigned int int_crt_support:1;
        unsigned int lvds_use_ssc:1;
        unsigned int int_lvds_support:1;
        unsigned int display_clock_mode:1;
        unsigned int fdi_rx_polarity_inverted:1;
        unsigned int panel_type:4;
        int lvds_ssc_freq;
        unsigned int bios_lvds_val; /* initial [PCH_]LVDS reg val in VBIOS */
        enum drm_panel_orientation orientation;

        enum drrs_support_type drrs_type;

        struct {
                int rate;
                int lanes;
                int preemphasis;
                int vswing;
                bool low_vswing;
                bool initialized;
                int bpp;
                struct edp_power_seq pps;
        } edp;

        struct {
                bool enable;
                bool full_link;
                bool require_aux_wakeup;
                int idle_frames;
                enum psr_lines_to_wait lines_to_wait;
                int tp1_wakeup_time_us;
                int tp2_tp3_wakeup_time_us;
                int psr2_tp2_tp3_wakeup_time_us;
        } psr;

        struct {
                u16 pwm_freq_hz;
                bool present;
                bool active_low_pwm;
                u8 min_brightness;      /* min_brightness/255 of max */
                u8 controller;          /* brightness controller number */
                enum intel_backlight_type type;
        } backlight;

        /* MIPI DSI */
        struct {
                u16 panel_id;
                struct mipi_config *config;
                struct mipi_pps_data *pps;
                u16 bl_ports;
                u16 cabc_ports;
                u8 seq_version;
                u32 size;
                u8 *data;
                const u8 *sequence[MIPI_SEQ_MAX];
                u8 *deassert_seq; /* Used by fixup_mipi_sequences() */
                enum drm_panel_orientation orientation;
        } dsi;

        int crt_ddc_pin;

        int child_dev_num;
        struct child_device_config *child_dev;

        struct ddi_vbt_port_info ddi_port_info[I915_MAX_PORTS];
        struct sdvo_device_mapping sdvo_mappings[2];
};

enum intel_ddb_partitioning {
        INTEL_DDB_PART_1_2,
        INTEL_DDB_PART_5_6, /* IVB+ */
};

struct intel_wm_level {
        bool enable;
        u32 pri_val;
        u32 spr_val;
        u32 cur_val;
        u32 fbc_val;
};

struct ilk_wm_values {
        u32 wm_pipe[3];
        u32 wm_lp[3];
        u32 wm_lp_spr[3];
        u32 wm_linetime[3];
        bool enable_fbc_wm;
        enum intel_ddb_partitioning partitioning;
};

struct g4x_pipe_wm {
        u16 plane[I915_MAX_PLANES];
        u16 fbc;
};

struct g4x_sr_wm {
        u16 plane;
        u16 cursor;
        u16 fbc;
};

struct vlv_wm_ddl_values {
        u8 plane[I915_MAX_PLANES];
};

struct vlv_wm_values {
        struct g4x_pipe_wm pipe[3];
        struct g4x_sr_wm sr;
        struct vlv_wm_ddl_values ddl[3];
        u8 level;
        bool cxsr;
};

struct g4x_wm_values {
        struct g4x_pipe_wm pipe[2];
        struct g4x_sr_wm sr;
        struct g4x_sr_wm hpll;
        bool cxsr;
        bool hpll_en;
        bool fbc_en;
};

struct skl_ddb_entry {
        u16 start, end; /* in number of blocks, 'end' is exclusive */
};

static inline u16 skl_ddb_entry_size(const struct skl_ddb_entry *entry)
{
        return entry->end - entry->start;
}

static inline bool skl_ddb_entry_equal(const struct skl_ddb_entry *e1,
                                       const struct skl_ddb_entry *e2)
{
        if (e1->start == e2->start && e1->end == e2->end)
                return true;

        return false;
}

struct skl_ddb_allocation {
        u8 enabled_slices; /* GEN11 has configurable 2 slices */
};

struct skl_ddb_values {
        unsigned dirty_pipes;
        struct skl_ddb_allocation ddb;
};

struct skl_wm_level {
        u16 min_ddb_alloc;
        u16 plane_res_b;
        u8 plane_res_l;
        bool plane_en;
        bool ignore_lines;
};

/* Stores plane specific WM parameters */
struct skl_wm_params {
        bool x_tiled, y_tiled;
        bool rc_surface;
        bool is_planar;
        u32 width;
        u8 cpp;
        u32 plane_pixel_rate;
        u32 y_min_scanlines;
        u32 plane_bytes_per_line;
        uint_fixed_16_16_t plane_blocks_per_line;
        uint_fixed_16_16_t y_tile_minimum;
        u32 linetime_us;
        u32 dbuf_block_size;
};

/*
 * This struct helps tracking the state needed for runtime PM, which puts the
 * device in PCI D3 state. Notice that when this happens, nothing on the
 * graphics device works, even register access, so we don't get interrupts nor
 * anything else.
 *
 * Every piece of our code that needs to actually touch the hardware needs to
 * either call intel_runtime_pm_get or call intel_display_power_get with the
 * appropriate power domain.
 *
 * Our driver uses the autosuspend delay feature, which means we'll only really
 * suspend if we stay with zero refcount for a certain amount of time. The
 * default value is currently very conservative (see intel_runtime_pm_enable), but
 * it can be changed with the standard runtime PM files from sysfs.
 *
 * The irqs_disabled variable becomes true exactly after we disable the IRQs and
 * goes back to false exactly before we reenable the IRQs. We use this variable
 * to check if someone is trying to enable/disable IRQs while they're supposed
 * to be disabled. This shouldn't happen and we'll print some error messages in
 * case it happens.
 *
 * For more, read the Documentation/power/runtime_pm.txt.
 */
struct i915_runtime_pm {
        atomic_t wakeref_count;
        bool suspended;
        bool irqs_enabled;

#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
        /*
         * To aide detection of wakeref leaks and general misuse, we
         * track all wakeref holders. With manual markup (i.e. returning
         * a cookie to each rpm_get caller which they then supply to their
         * paired rpm_put) we can remove corresponding pairs of and keep
         * the array trimmed to active wakerefs.
         */
        struct intel_runtime_pm_debug {
                spinlock_t lock;

                depot_stack_handle_t last_acquire;
                depot_stack_handle_t last_release;

                depot_stack_handle_t *owners;
                unsigned long count;
        } debug;
#endif
};

enum intel_pipe_crc_source {
        INTEL_PIPE_CRC_SOURCE_NONE,
        INTEL_PIPE_CRC_SOURCE_PLANE1,
        INTEL_PIPE_CRC_SOURCE_PLANE2,
        INTEL_PIPE_CRC_SOURCE_PLANE3,
        INTEL_PIPE_CRC_SOURCE_PLANE4,
        INTEL_PIPE_CRC_SOURCE_PLANE5,
        INTEL_PIPE_CRC_SOURCE_PLANE6,
        INTEL_PIPE_CRC_SOURCE_PLANE7,
        INTEL_PIPE_CRC_SOURCE_PIPE,
        /* TV/DP on pre-gen5/vlv can't use the pipe source. */
        INTEL_PIPE_CRC_SOURCE_TV,
        INTEL_PIPE_CRC_SOURCE_DP_B,
        INTEL_PIPE_CRC_SOURCE_DP_C,
        INTEL_PIPE_CRC_SOURCE_DP_D,
        INTEL_PIPE_CRC_SOURCE_AUTO,
        INTEL_PIPE_CRC_SOURCE_MAX,
};

#define INTEL_PIPE_CRC_ENTRIES_NR       128
struct intel_pipe_crc {
        spinlock_t lock;
        int skipped;
        enum intel_pipe_crc_source source;
};

struct i915_frontbuffer_tracking {
        spinlock_t lock;

        /*
         * Tracking bits for delayed frontbuffer flushing du to gpu activity or
         * scheduled flips.
         */
        unsigned busy_bits;
        unsigned flip_bits;
};

struct i915_virtual_gpu {
        bool active;
        u32 caps;
};

/* used in computing the new watermarks state */
struct intel_wm_config {
        unsigned int num_pipes_active;
        bool sprites_enabled;
        bool sprites_scaled;
};

struct i915_oa_format {
        u32 format;
        int size;
};

struct i915_oa_reg {
        i915_reg_t addr;
        u32 value;
};

struct i915_oa_config {
        char uuid[UUID_STRING_LEN + 1];
        int id;

        const struct i915_oa_reg *mux_regs;
        u32 mux_regs_len;
        const struct i915_oa_reg *b_counter_regs;
        u32 b_counter_regs_len;
        const struct i915_oa_reg *flex_regs;
        u32 flex_regs_len;

        struct attribute_group sysfs_metric;
        struct attribute *attrs[2];
        struct device_attribute sysfs_metric_id;

        atomic_t ref_count;
};

struct i915_perf_stream;

/**
 * struct i915_perf_stream_ops - the OPs to support a specific stream type
 */
struct i915_perf_stream_ops {
        /**
         * @enable: Enables the collection of HW samples, either in response to
         * `I915_PERF_IOCTL_ENABLE` or implicitly called when stream is opened
         * without `I915_PERF_FLAG_DISABLED`.
         */
        void (*enable)(struct i915_perf_stream *stream);

        /**
         * @disable: Disables the collection of HW samples, either in response
         * to `I915_PERF_IOCTL_DISABLE` or implicitly called before destroying
         * the stream.
         */
        void (*disable)(struct i915_perf_stream *stream);

        /**
         * @poll_wait: Call poll_wait, passing a wait queue that will be woken
         * once there is something ready to read() for the stream
         */
        void (*poll_wait)(struct i915_perf_stream *stream,
                          struct file *file,
                          poll_table *wait);

        /**
         * @wait_unlocked: For handling a blocking read, wait until there is
         * something to ready to read() for the stream. E.g. wait on the same
         * wait queue that would be passed to poll_wait().
         */
        int (*wait_unlocked)(struct i915_perf_stream *stream);

        /**
         * @read: Copy buffered metrics as records to userspace
         * **buf**: the userspace, destination buffer
         * **count**: the number of bytes to copy, requested by userspace
         * **offset**: zero at the start of the read, updated as the read
         * proceeds, it represents how many bytes have been copied so far and
         * the buffer offset for copying the next record.
         *
         * Copy as many buffered i915 perf samples and records for this stream
         * to userspace as will fit in the given buffer.
         *
         * Only write complete records; returning -%ENOSPC if there isn't room
         * for a complete record.
         *
         * Return any error condition that results in a short read such as
         * -%ENOSPC or -%EFAULT, even though these may be squashed before
         * returning to userspace.
         */
        int (*read)(struct i915_perf_stream *stream,
                    char __user *buf,
                    size_t count,
                    size_t *offset);

        /**
         * @destroy: Cleanup any stream specific resources.
         *
         * The stream will always be disabled before this is called.
         */
        void (*destroy)(struct i915_perf_stream *stream);
};

/**
 * struct i915_perf_stream - state for a single open stream FD
 */
struct i915_perf_stream {
        /**
         * @dev_priv: i915 drm device
         */
        struct drm_i915_private *dev_priv;

        /**
         * @link: Links the stream into ``&drm_i915_private->streams``
         */
        struct list_head link;

        /**
         * @wakeref: As we keep the device awake while the perf stream is
         * active, we track our runtime pm reference for later release.
         */
        intel_wakeref_t wakeref;

        /**
         * @sample_flags: Flags representing the `DRM_I915_PERF_PROP_SAMPLE_*`
         * properties given when opening a stream, representing the contents
         * of a single sample as read() by userspace.
         */
        u32 sample_flags;

        /**
         * @sample_size: Considering the configured contents of a sample
         * combined with the required header size, this is the total size
         * of a single sample record.
         */
        int sample_size;

        /**
         * @ctx: %NULL if measuring system-wide across all contexts or a
         * specific context that is being monitored.
         */
        struct i915_gem_context *ctx;

        /**
         * @enabled: Whether the stream is currently enabled, considering
         * whether the stream was opened in a disabled state and based
         * on `I915_PERF_IOCTL_ENABLE` and `I915_PERF_IOCTL_DISABLE` calls.
         */
        bool enabled;

        /**
         * @ops: The callbacks providing the implementation of this specific
         * type of configured stream.
         */
        const struct i915_perf_stream_ops *ops;

        /**
         * @oa_config: The OA configuration used by the stream.
         */
        struct i915_oa_config *oa_config;
};

/**
 * struct i915_oa_ops - Gen specific implementation of an OA unit stream
 */
struct i915_oa_ops {
        /**
         * @is_valid_b_counter_reg: Validates register's address for
         * programming boolean counters for a particular platform.
         */
        bool (*is_valid_b_counter_reg)(struct drm_i915_private *dev_priv,
                                       u32 addr);

        /**
         * @is_valid_mux_reg: Validates register's address for programming mux
         * for a particular platform.
         */
        bool (*is_valid_mux_reg)(struct drm_i915_private *dev_priv, u32 addr);

        /**
         * @is_valid_flex_reg: Validates register's address for programming
         * flex EU filtering for a particular platform.
         */
        bool (*is_valid_flex_reg)(struct drm_i915_private *dev_priv, u32 addr);

        /**
         * @enable_metric_set: Selects and applies any MUX configuration to set
         * up the Boolean and Custom (B/C) counters that are part of the
         * counter reports being sampled. May apply system constraints such as
         * disabling EU clock gating as required.
         */
        int (*enable_metric_set)(struct i915_perf_stream *stream);

        /**
         * @disable_metric_set: Remove system constraints associated with using
         * the OA unit.
         */
        void (*disable_metric_set)(struct drm_i915_private *dev_priv);

        /**
         * @oa_enable: Enable periodic sampling
         */
        void (*oa_enable)(struct i915_perf_stream *stream);

        /**
         * @oa_disable: Disable periodic sampling
         */
        void (*oa_disable)(struct i915_perf_stream *stream);

        /**
         * @read: Copy data from the circular OA buffer into a given userspace
         * buffer.
         */
        int (*read)(struct i915_perf_stream *stream,
                    char __user *buf,
                    size_t count,
                    size_t *offset);

        /**
         * @oa_hw_tail_read: read the OA tail pointer register
         *
         * In particular this enables us to share all the fiddly code for
         * handling the OA unit tail pointer race that affects multiple
         * generations.
         */
        u32 (*oa_hw_tail_read)(struct drm_i915_private *dev_priv);
};

struct intel_cdclk_state {
        unsigned int cdclk, vco, ref, bypass;
        u8 voltage_level;
};

struct drm_i915_private {
        struct drm_device drm;

        const struct intel_device_info __info; /* Use INTEL_INFO() to access. */
        struct intel_runtime_info __runtime; /* Use RUNTIME_INFO() to access. */
        struct intel_driver_caps caps;

        /**
         * Data Stolen Memory - aka "i915 stolen memory" gives us the start and
         * end of stolen which we can optionally use to create GEM objects
         * backed by stolen memory. Note that stolen_usable_size tells us
         * exactly how much of this we are actually allowed to use, given that
         * some portion of it is in fact reserved for use by hardware functions.
         */
        struct resource dsm;
        /**
         * Reseved portion of Data Stolen Memory
         */
        struct resource dsm_reserved;

        /*
         * Stolen memory is segmented in hardware with different portions
         * offlimits to certain functions.
         *
         * The drm_mm is initialised to the total accessible range, as found
         * from the PCI config. On Broadwell+, this is further restricted to
         * avoid the first page! The upper end of stolen memory is reserved for
         * hardware functions and similarly removed from the accessible range.
         */
        resource_size_t stolen_usable_size;     /* Total size minus reserved ranges */

        struct intel_uncore uncore;

        struct i915_virtual_gpu vgpu;

        struct intel_gvt *gvt;

        struct intel_wopcm wopcm;

        struct intel_huc huc;
        struct intel_guc guc;

        struct intel_csr csr;

        struct intel_gmbus gmbus[GMBUS_NUM_PINS];

        /** gmbus_mutex protects against concurrent usage of the single hw gmbus
         * controller on different i2c buses. */
        struct mutex gmbus_mutex;

        /**
         * Base address of where the gmbus and gpio blocks are located (either
         * on PCH or on SoC for platforms without PCH).
         */
        u32 gpio_mmio_base;

        /* MMIO base address for MIPI regs */
        u32 mipi_mmio_base;

        u32 psr_mmio_base;

        u32 pps_mmio_base;

        wait_queue_head_t gmbus_wait_queue;

        struct pci_dev *bridge_dev;
        struct intel_engine_cs *engine[I915_NUM_ENGINES];
        /* Context used internally to idle the GPU and setup initial state */
        struct i915_gem_context *kernel_context;
        /* Context only to be used for injecting preemption commands */
        struct i915_gem_context *preempt_context;
        struct intel_engine_cs *engine_class[MAX_ENGINE_CLASS + 1]
                                            [MAX_ENGINE_INSTANCE + 1];

        struct resource mch_res;

        /* protects the irq masks */
        spinlock_t irq_lock;

        bool display_irqs_enabled;

        /* To control wakeup latency, e.g. for irq-driven dp aux transfers. */
        struct pm_qos_request pm_qos;

        /* Sideband mailbox protection */
        struct mutex sb_lock;
        struct pm_qos_request sb_qos;

        /** Cached value of IMR to avoid reads in updating the bitfield */
        union {
                u32 irq_mask;
                u32 de_irq_mask[I915_MAX_PIPES];
        };
        u32 gt_irq_mask;
        u32 pm_imr;
        u32 pm_ier;
        u32 pm_rps_events;
        u32 pm_guc_events;
        u32 pipestat_irq_mask[I915_MAX_PIPES];

        struct i915_hotplug hotplug;
        struct intel_fbc fbc;
        struct i915_drrs drrs;
        struct intel_opregion opregion;
        struct intel_vbt_data vbt;

        bool preserve_bios_swizzle;

        /* overlay */
        struct intel_overlay *overlay;

        /* backlight registers and fields in struct intel_panel */
        struct mutex backlight_lock;

        /* LVDS info */
        bool no_aux_handshake;

        /* protects panel power sequencer state */
        struct mutex pps_mutex;

        struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
        int num_fence_regs; /* 8 on pre-965, 16 otherwise */

        unsigned int fsb_freq, mem_freq, is_ddr3;
        unsigned int skl_preferred_vco_freq;
        unsigned int max_cdclk_freq;

        unsigned int max_dotclk_freq;
        unsigned int rawclk_freq;
        unsigned int hpll_freq;
        unsigned int fdi_pll_freq;
        unsigned int czclk_freq;

        struct {
                /*
                 * The current logical cdclk state.
                 * See intel_atomic_state.cdclk.logical
                 *
                 * For reading holding any crtc lock is sufficient,
                 * for writing must hold all of them.
                 */
                struct intel_cdclk_state logical;
                /*
                 * The current actual cdclk state.
                 * See intel_atomic_state.cdclk.actual
                 */
                struct intel_cdclk_state actual;
                /* The current hardware cdclk state */
                struct intel_cdclk_state hw;

                int force_min_cdclk;
        } cdclk;

        /**
         * wq - Driver workqueue for GEM.
         *
         * NOTE: Work items scheduled here are not allowed to grab any modeset
         * locks, for otherwise the flushing done in the pageflip code will
         * result in deadlocks.
         */
        struct workqueue_struct *wq;

        /* ordered wq for modesets */
        struct workqueue_struct *modeset_wq;

        /* Display functions */
        struct drm_i915_display_funcs display;

        /* PCH chipset type */
        enum intel_pch pch_type;
        unsigned short pch_id;

        unsigned long quirks;

        struct drm_atomic_state *modeset_restore_state;
        struct drm_modeset_acquire_ctx reset_ctx;

        struct i915_ggtt ggtt; /* VM representing the global address space */

        struct i915_gem_mm mm;
        DECLARE_HASHTABLE(mm_structs, 7);
        struct mutex mm_lock;

        struct intel_ppat ppat;

        /* Kernel Modesetting */

        struct intel_crtc *plane_to_crtc_mapping[I915_MAX_PIPES];
        struct intel_crtc *pipe_to_crtc_mapping[I915_MAX_PIPES];

#ifdef CONFIG_DEBUG_FS
        struct intel_pipe_crc pipe_crc[I915_MAX_PIPES];
#endif

        /* dpll and cdclk state is protected by connection_mutex */
        int num_shared_dpll;
        struct intel_shared_dpll shared_dplls[I915_NUM_PLLS];
        const struct intel_dpll_mgr *dpll_mgr;

        /*
         * dpll_lock serializes intel_{prepare,enable,disable}_shared_dpll.
         * Must be global rather than per dpll, because on some platforms
         * plls share registers.
         */
        struct mutex dpll_lock;

        unsigned int active_crtcs;
        /* minimum acceptable cdclk for each pipe */
        int min_cdclk[I915_MAX_PIPES];
        /* minimum acceptable voltage level for each pipe */
        u8 min_voltage_level[I915_MAX_PIPES];

        int dpio_phy_iosf_port[I915_NUM_PHYS_VLV];

        struct i915_wa_list gt_wa_list;

        struct i915_frontbuffer_tracking fb_tracking;

        struct intel_atomic_helper {
                struct llist_head free_list;
                struct work_struct free_work;
        } atomic_helper;

        u16 orig_clock;

        bool mchbar_need_disable;

        struct intel_l3_parity l3_parity;

        /*
         * edram size in MB.
         * Cannot be determined by PCIID. You must always read a register.
         */
        u32 edram_size_mb;

        /* gen6+ GT PM state */
        struct intel_gen6_power_mgmt gt_pm;

        /* ilk-only ips/rps state. Everything in here is protected by the global
         * mchdev_lock in intel_pm.c */
        struct intel_ilk_power_mgmt ips;

        struct i915_power_domains power_domains;

        struct i915_psr psr;

        struct i915_gpu_error gpu_error;

        struct drm_i915_gem_object *vlv_pctx;

        /* list of fbdev register on this device */
        struct intel_fbdev *fbdev;
        struct work_struct fbdev_suspend_work;

        struct drm_property *broadcast_rgb_property;
        struct drm_property *force_audio_property;

        /* hda/i915 audio component */
        struct i915_audio_component *audio_component;
        bool audio_component_registered;
        /**
         * av_mutex - mutex for audio/video sync
         *
         */
        struct mutex av_mutex;
        int audio_power_refcount;

        struct {
                struct mutex mutex;
                struct list_head list;
                struct llist_head free_list;
                struct work_struct free_work;

                /* The hw wants to have a stable context identifier for the
                 * lifetime of the context (for OA, PASID, faults, etc).
                 * This is limited in execlists to 21 bits.
                 */
                struct ida hw_ida;
#define MAX_CONTEXT_HW_ID (1<<21) /* exclusive */
#define MAX_GUC_CONTEXT_HW_ID (1 << 20) /* exclusive */
#define GEN11_MAX_CONTEXT_HW_ID (1<<11) /* exclusive */
                struct list_head hw_id_list;
        } contexts;

        u32 fdi_rx_config;

        /* Shadow for DISPLAY_PHY_CONTROL which can't be safely read */
        u32 chv_phy_control;
        /*
         * Shadows for CHV DPLL_MD regs to keep the state
         * checker somewhat working in the presence hardware
         * crappiness (can't read out DPLL_MD for pipes B & C).
         */
        u32 chv_dpll_md[I915_MAX_PIPES];
        u32 bxt_phy_grc;

        u32 suspend_count;
        bool power_domains_suspended;
        struct i915_suspend_saved_registers regfile;
        struct vlv_s0ix_state vlv_s0ix_state;

        enum {
                I915_SAGV_UNKNOWN = 0,
                I915_SAGV_DISABLED,
                I915_SAGV_ENABLED,
                I915_SAGV_NOT_CONTROLLED
        } sagv_status;

        struct {
                /*
                 * Raw watermark latency values:
                 * in 0.1us units for WM0,
                 * in 0.5us units for WM1+.
                 */
                /* primary */
                u16 pri_latency[5];
                /* sprite */
                u16 spr_latency[5];
                /* cursor */
                u16 cur_latency[5];
                /*
                 * Raw watermark memory latency values
                 * for SKL for all 8 levels
                 * in 1us units.
                 */
                u16 skl_latency[8];

                /* current hardware state */
                union {
                        struct ilk_wm_values hw;
                        struct skl_ddb_values skl_hw;
                        struct vlv_wm_values vlv;
                        struct g4x_wm_values g4x;
                };

                u8 max_level;

                /*
                 * Should be held around atomic WM register writing; also
                 * protects * intel_crtc->wm.active and
                 * cstate->wm.need_postvbl_update.
                 */
                struct mutex wm_mutex;

                /*
                 * Set during HW readout of watermarks/DDB.  Some platforms
                 * need to know when we're still using BIOS-provided values
                 * (which we don't fully trust).
                 */
                bool distrust_bios_wm;
        } wm;

        struct dram_info {
                bool valid;
                bool is_16gb_dimm;
                u8 num_channels;
                u8 ranks;
                u32 bandwidth_kbps;
                bool symmetric_memory;
                enum intel_dram_type {
                        INTEL_DRAM_UNKNOWN,
                        INTEL_DRAM_DDR3,
                        INTEL_DRAM_DDR4,
                        INTEL_DRAM_LPDDR3,
                        INTEL_DRAM_LPDDR4
                } type;
        } dram_info;

        struct i915_runtime_pm runtime_pm;

        struct {
                bool initialized;

                struct kobject *metrics_kobj;
                struct ctl_table_header *sysctl_header;

                /*
                 * Lock associated with adding/modifying/removing OA configs
                 * in dev_priv->perf.metrics_idr.
                 */
                struct mutex metrics_lock;

                /*
                 * List of dynamic configurations, you need to hold
                 * dev_priv->perf.metrics_lock to access it.
                 */
                struct idr metrics_idr;

                /*
                 * Lock associated with anything below within this structure
                 * except exclusive_stream.
                 */
                struct mutex lock;
                struct list_head streams;

                struct {
                        /*
                         * The stream currently using the OA unit. If accessed
                         * outside a syscall associated to its file
                         * descriptor, you need to hold
                         * dev_priv->drm.struct_mutex.
                         */
                        struct i915_perf_stream *exclusive_stream;

                        struct intel_context *pinned_ctx;
                        u32 specific_ctx_id;
                        u32 specific_ctx_id_mask;

                        struct hrtimer poll_check_timer;
                        wait_queue_head_t poll_wq;
                        bool pollin;

                        /**
                         * For rate limiting any notifications of spurious
                         * invalid OA reports
                         */
                        struct ratelimit_state spurious_report_rs;

                        bool periodic;
                        int period_exponent;

                        struct i915_oa_config test_config;

                        struct {
                                struct i915_vma *vma;
                                u8 *vaddr;
                                u32 last_ctx_id;
                                int format;
                                int format_size;

                                /**
                                 * Locks reads and writes to all head/tail state
                                 *
                                 * Consider: the head and tail pointer state
                                 * needs to be read consistently from a hrtimer
                                 * callback (atomic context) and read() fop
                                 * (user context) with tail pointer updates
                                 * happening in atomic context and head updates
                                 * in user context and the (unlikely)
                                 * possibility of read() errors needing to
                                 * reset all head/tail state.
                                 *
                                 * Note: Contention or performance aren't
                                 * currently a significant concern here
                                 * considering the relatively low frequency of
                                 * hrtimer callbacks (5ms period) and that
                                 * reads typically only happen in response to a
                                 * hrtimer event and likely complete before the
                                 * next callback.
                                 *
                                 * Note: This lock is not held *while* reading
                                 * and copying data to userspace so the value
                                 * of head observed in htrimer callbacks won't
                                 * represent any partial consumption of data.
                                 */
                                spinlock_t ptr_lock;

                                /**
                                 * One 'aging' tail pointer and one 'aged'
                                 * tail pointer ready to used for reading.
                                 *
                                 * Initial values of 0xffffffff are invalid
                                 * and imply that an update is required
                                 * (and should be ignored by an attempted
                                 * read)
                                 */
                                struct {
                                        u32 offset;
                                } tails[2];

                                /**
                                 * Index for the aged tail ready to read()
                                 * data up to.
                                 */
                                unsigned int aged_tail_idx;

                                /**
                                 * A monotonic timestamp for when the current
                                 * aging tail pointer was read; used to
                                 * determine when it is old enough to trust.
                                 */
                                u64 aging_timestamp;

                                /**
                                 * Although we can always read back the head
                                 * pointer register, we prefer to avoid
                                 * trusting the HW state, just to avoid any
                                 * risk that some hardware condition could
                                 * somehow bump the head pointer unpredictably
                                 * and cause us to forward the wrong OA buffer
                                 * data to userspace.
                                 */
                                u32 head;
                        } oa_buffer;

                        u32 gen7_latched_oastatus1;
                        u32 ctx_oactxctrl_offset;
                        u32 ctx_flexeu0_offset;

                        /**
                         * The RPT_ID/reason field for Gen8+ includes a bit
                         * to determine if the CTX ID in the report is valid
                         * but the specific bit differs between Gen 8 and 9
                         */
                        u32 gen8_valid_ctx_bit;

                        struct i915_oa_ops ops;
                        const struct i915_oa_format *oa_formats;
                } oa;
        } perf;

        /* Abstract the submission mechanism (legacy ringbuffer or execlists) away */
        struct {
                struct i915_gt_timelines {
                        struct mutex mutex; /* protects list, tainted by GPU */
                        struct list_head active_list;

                        /* Pack multiple timelines' seqnos into the same page */
                        spinlock_t hwsp_lock;
                        struct list_head hwsp_free_list;
                } timelines;

                struct list_head active_rings;
                struct list_head closed_vma;

                struct intel_wakeref wakeref;

                /**
                 * Is the GPU currently considered idle, or busy executing
                 * userspace requests? Whilst idle, we allow runtime power
                 * management to power down the hardware and display clocks.
                 * In order to reduce the effect on performance, there
                 * is a slight delay before we do so.
                 */
                intel_wakeref_t awake;

                struct blocking_notifier_head pm_notifications;

                ktime_t last_init_time;

                struct i915_vma *scratch;
        } gt;

        struct {
                struct notifier_block pm_notifier;

                /**
                 * We leave the user IRQ off as much as possible,
                 * but this means that requests will finish and never
                 * be retired once the system goes idle. Set a timer to
                 * fire periodically while the ring is running. When it
                 * fires, go retire requests.
                 */
                struct delayed_work retire_work;

                /**
                 * When we detect an idle GPU, we want to turn on
                 * powersaving features. So once we see that there
                 * are no more requests outstanding and no more
                 * arrive within a small period of time, we fire
                 * off the idle_work.
                 */
                struct work_struct idle_work;
        } gem;

        /* For i945gm vblank irq vs. C3 workaround */
        struct {
                struct work_struct work;
                struct pm_qos_request pm_qos;
                u8 c3_disable_latency;
                u8 enabled;
        } i945gm_vblank;

        /* perform PHY state sanity checks? */
        bool chv_phy_assert[2];

        bool ipc_enabled;

        /* Used to save the pipe-to-encoder mapping for audio */
        struct intel_encoder *av_enc_map[I915_MAX_PIPES];

        /* necessary resource sharing with HDMI LPE audio driver. */
        struct {
                struct platform_device *platdev;
                int     irq;
        } lpe_audio;

        struct i915_pmu pmu;

        struct i915_hdcp_comp_master *hdcp_master;
        bool hdcp_comp_added;

        /* Mutex to protect the above hdcp component related values. */
        struct mutex hdcp_comp_mutex;

        /*
         * NOTE: This is the dri1/ums dungeon, don't add stuff here. Your patch
         * will be rejected. Instead look for a better place.
         */
};

struct dram_dimm_info {
        u8 size, width, ranks;
};

struct dram_channel_info {
        struct dram_dimm_info dimm_l, dimm_s;
        u8 ranks;
        bool is_16gb_dimm;
};

static inline struct drm_i915_private *to_i915(const struct drm_device *dev)
{
        return container_of(dev, struct drm_i915_private, drm);
}

static inline struct drm_i915_private *kdev_to_i915(struct device *kdev)
{
        return to_i915(dev_get_drvdata(kdev));
}

static inline struct drm_i915_private *wopcm_to_i915(struct intel_wopcm *wopcm)
{
        return container_of(wopcm, struct drm_i915_private, wopcm);
}

static inline struct drm_i915_private *guc_to_i915(struct intel_guc *guc)
{
        return container_of(guc, struct drm_i915_private, guc);
}

static inline struct drm_i915_private *huc_to_i915(struct intel_huc *huc)
{
        return container_of(huc, struct drm_i915_private, huc);
}

static inline struct drm_i915_private *uncore_to_i915(struct intel_uncore *uncore)
{
        return container_of(uncore, struct drm_i915_private, uncore);
}

/* Simple iterator over all initialised engines */
#define for_each_engine(engine__, dev_priv__, id__) \
        for ((id__) = 0; \
             (id__) < I915_NUM_ENGINES; \
             (id__)++) \
                for_each_if ((engine__) = (dev_priv__)->engine[(id__)])

/* Iterator over subset of engines selected by mask */
#define for_each_engine_masked(engine__, dev_priv__, mask__, tmp__) \
        for ((tmp__) = (mask__) & INTEL_INFO(dev_priv__)->engine_mask; \
             (tmp__) ? \
             ((engine__) = (dev_priv__)->engine[__mask_next_bit(tmp__)]), 1 : \
             0;)

enum hdmi_force_audio {
        HDMI_AUDIO_OFF_DVI = -2,        /* no aux data for HDMI-DVI converter */
        HDMI_AUDIO_OFF,                 /* force turn off HDMI audio */
        HDMI_AUDIO_AUTO,                /* trust EDID */
        HDMI_AUDIO_ON,                  /* force turn on HDMI audio */
};

#define I915_GTT_OFFSET_NONE ((u32)-1)

/*
 * Frontbuffer tracking bits. Set in obj->frontbuffer_bits while a gem bo is
 * considered to be the frontbuffer for the given plane interface-wise. This
 * doesn't mean that the hw necessarily already scans it out, but that any
 * rendering (by the cpu or gpu) will land in the frontbuffer eventually.
 *
 * We have one bit per pipe and per scanout plane type.
 */
#define INTEL_FRONTBUFFER_BITS_PER_PIPE 8
#define INTEL_FRONTBUFFER(pipe, plane_id) ({ \
        BUILD_BUG_ON(INTEL_FRONTBUFFER_BITS_PER_PIPE * I915_MAX_PIPES > 32); \
        BUILD_BUG_ON(I915_MAX_PLANES > INTEL_FRONTBUFFER_BITS_PER_PIPE); \
        BIT((plane_id) + INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe)); \
})
#define INTEL_FRONTBUFFER_OVERLAY(pipe) \
        BIT(INTEL_FRONTBUFFER_BITS_PER_PIPE - 1 + INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))
#define INTEL_FRONTBUFFER_ALL_MASK(pipe) \
        GENMASK(INTEL_FRONTBUFFER_BITS_PER_PIPE * ((pipe) + 1) - 1, \
                INTEL_FRONTBUFFER_BITS_PER_PIPE * (pipe))

/*
 * Optimised SGL iterator for GEM objects
 */
static __always_inline struct sgt_iter {
        struct scatterlist *sgp;
        union {
                unsigned long pfn;
                dma_addr_t dma;
        };
        unsigned int curr;
        unsigned int max;
} __sgt_iter(struct scatterlist *sgl, bool dma) {
        struct sgt_iter s = { .sgp = sgl };

        if (s.sgp) {
                s.max = s.curr = s.sgp->offset;
                s.max += s.sgp->length;
                if (dma)
                        s.dma = sg_dma_address(s.sgp);
                else
                        s.pfn = page_to_pfn(sg_page(s.sgp));
        }

        return s;
}

static inline struct scatterlist *____sg_next(struct scatterlist *sg)
{
        ++sg;
        if (unlikely(sg_is_chain(sg)))
                sg = sg_chain_ptr(sg);
        return sg;
}

/**
 * __sg_next - return the next scatterlist entry in a list
 * @sg:         The current sg entry
 *
 * Description:
 *   If the entry is the last, return NULL; otherwise, step to the next
 *   element in the array (@sg@+1). If that's a chain pointer, follow it;
 *   otherwise just return the pointer to the current element.
 **/
static inline struct scatterlist *__sg_next(struct scatterlist *sg)
{
        return sg_is_last(sg) ? NULL : ____sg_next(sg);
}

/**
 * for_each_sgt_dma - iterate over the DMA addresses of the given sg_table
 * @__dmap:     DMA address (output)
 * @__iter:     'struct sgt_iter' (iterator state, internal)
 * @__sgt:      sg_table to iterate over (input)
 */
#define for_each_sgt_dma(__dmap, __iter, __sgt)                         \
        for ((__iter) = __sgt_iter((__sgt)->sgl, true);                 \
             ((__dmap) = (__iter).dma + (__iter).curr);                 \
             (((__iter).curr += I915_GTT_PAGE_SIZE) >= (__iter).max) ?  \
             (__iter) = __sgt_iter(__sg_next((__iter).sgp), true), 0 : 0)

/**
 * for_each_sgt_page - iterate over the pages of the given sg_table
 * @__pp:       page pointer (output)
 * @__iter:     'struct sgt_iter' (iterator state, internal)
 * @__sgt:      sg_table to iterate over (input)
 */
#define for_each_sgt_page(__pp, __iter, __sgt)                          \
        for ((__iter) = __sgt_iter((__sgt)->sgl, false);                \
             ((__pp) = (__iter).pfn == 0 ? NULL :                       \
              pfn_to_page((__iter).pfn + ((__iter).curr >> PAGE_SHIFT))); \
             (((__iter).curr += PAGE_SIZE) >= (__iter).max) ?           \
             (__iter) = __sgt_iter(__sg_next((__iter).sgp), false), 0 : 0)

bool i915_sg_trim(struct sg_table *orig_st);

static inline unsigned int i915_sg_page_sizes(struct scatterlist *sg)
{
        unsigned int page_sizes;

        page_sizes = 0;
        while (sg) {
                GEM_BUG_ON(sg->offset);
                GEM_BUG_ON(!IS_ALIGNED(sg->length, PAGE_SIZE));
                page_sizes |= sg->length;
                sg = __sg_next(sg);
        }

        return page_sizes;
}

static inline unsigned int i915_sg_segment_size(void)
{
        unsigned int size = swiotlb_max_segment();

        if (size == 0)
                return SCATTERLIST_MAX_SEGMENT;

        size = rounddown(size, PAGE_SIZE);
        /* swiotlb_max_segment_size can return 1 byte when it means one page. */
        if (size < PAGE_SIZE)
                size = PAGE_SIZE;

        return size;
}

#define INTEL_INFO(dev_priv)    (&(dev_priv)->__info)
#define RUNTIME_INFO(dev_priv)  (&(dev_priv)->__runtime)
#define DRIVER_CAPS(dev_priv)   (&(dev_priv)->caps)

#define INTEL_GEN(dev_priv)     (INTEL_INFO(dev_priv)->gen)
#define INTEL_DEVID(dev_priv)   (RUNTIME_INFO(dev_priv)->device_id)

#define REVID_FOREVER           0xff
#define INTEL_REVID(dev_priv)   ((dev_priv)->drm.pdev->revision)

#define INTEL_GEN_MASK(s, e) ( \
        BUILD_BUG_ON_ZERO(!__builtin_constant_p(s)) + \
        BUILD_BUG_ON_ZERO(!__builtin_constant_p(e)) + \
        GENMASK((e) - 1, (s) - 1))

/* Returns true if Gen is in inclusive range [Start, End] */
#define IS_GEN_RANGE(dev_priv, s, e) \
        (!!(INTEL_INFO(dev_priv)->gen_mask & INTEL_GEN_MASK((s), (e))))

#define IS_GEN(dev_priv, n) \
        (BUILD_BUG_ON_ZERO(!__builtin_constant_p(n)) + \
         INTEL_INFO(dev_priv)->gen == (n))

/*
 * Return true if revision is in range [since,until] inclusive.
 *
 * Use 0 for open-ended since, and REVID_FOREVER for open-ended until.
 */
#define IS_REVID(p, since, until) \
        (INTEL_REVID(p) >= (since) && INTEL_REVID(p) <= (until))

static __always_inline unsigned int
__platform_mask_index(const struct intel_runtime_info *info,
                      enum intel_platform p)
{
        const unsigned int pbits =
                BITS_PER_TYPE(info->platform_mask[0]) - INTEL_SUBPLATFORM_BITS;

        /* Expand the platform_mask array if this fails. */
        BUILD_BUG_ON(INTEL_MAX_PLATFORMS >
                     pbits * ARRAY_SIZE(info->platform_mask));

        return p / pbits;
}

static __always_inline unsigned int
__platform_mask_bit(const struct intel_runtime_info *info,
                    enum intel_platform p)
{
        const unsigned int pbits =
                BITS_PER_TYPE(info->platform_mask[0]) - INTEL_SUBPLATFORM_BITS;

        return p % pbits + INTEL_SUBPLATFORM_BITS;
}

static inline u32
intel_subplatform(const struct intel_runtime_info *info, enum intel_platform p)
{
        const unsigned int pi = __platform_mask_index(info, p);

        return info->platform_mask[pi] & INTEL_SUBPLATFORM_BITS;
}

static __always_inline bool
IS_PLATFORM(const struct drm_i915_private *i915, enum intel_platform p)
{
        const struct intel_runtime_info *info = RUNTIME_INFO(i915);
        const unsigned int pi = __platform_mask_index(info, p);
        const unsigned int pb = __platform_mask_bit(info, p);

        BUILD_BUG_ON(!__builtin_constant_p(p));

        return info->platform_mask[pi] & BIT(pb);
}

static __always_inline bool
IS_SUBPLATFORM(const struct drm_i915_private *i915,
               enum intel_platform p, unsigned int s)
{
        const struct intel_runtime_info *info = RUNTIME_INFO(i915);
        const unsigned int pi = __platform_mask_index(info, p);
        const unsigned int pb = __platform_mask_bit(info, p);
        const unsigned int msb = BITS_PER_TYPE(info->platform_mask[0]) - 1;
        const u32 mask = info->platform_mask[pi];

        BUILD_BUG_ON(!__builtin_constant_p(p));
        BUILD_BUG_ON(!__builtin_constant_p(s));
        BUILD_BUG_ON((s) >= INTEL_SUBPLATFORM_BITS);

        /* Shift and test on the MSB position so sign flag can be used. */
        return ((mask << (msb - pb)) & (mask << (msb - s))) & BIT(msb);
}

#define IS_MOBILE(dev_priv)     (INTEL_INFO(dev_priv)->is_mobile)

#define IS_I830(dev_priv)       IS_PLATFORM(dev_priv, INTEL_I830)
#define IS_I845G(dev_priv)      IS_PLATFORM(dev_priv, INTEL_I845G)
#define IS_I85X(dev_priv)       IS_PLATFORM(dev_priv, INTEL_I85X)
#define IS_I865G(dev_priv)      IS_PLATFORM(dev_priv, INTEL_I865G)
#define IS_I915G(dev_priv)      IS_PLATFORM(dev_priv, INTEL_I915G)
#define IS_I915GM(dev_priv)     IS_PLATFORM(dev_priv, INTEL_I915GM)
#define IS_I945G(dev_priv)      IS_PLATFORM(dev_priv, INTEL_I945G)
#define IS_I945GM(dev_priv)     IS_PLATFORM(dev_priv, INTEL_I945GM)
#define IS_I965G(dev_priv)      IS_PLATFORM(dev_priv, INTEL_I965G)
#define IS_I965GM(dev_priv)     IS_PLATFORM(dev_priv, INTEL_I965GM)
#define IS_G45(dev_priv)        IS_PLATFORM(dev_priv, INTEL_G45)
#define IS_GM45(dev_priv)       IS_PLATFORM(dev_priv, INTEL_GM45)
#define IS_G4X(dev_priv)        (IS_G45(dev_priv) || IS_GM45(dev_priv))
#define IS_PINEVIEW(dev_priv)   IS_PLATFORM(dev_priv, INTEL_PINEVIEW)
#define IS_G33(dev_priv)        IS_PLATFORM(dev_priv, INTEL_G33)
#define IS_IRONLAKE(dev_priv)   IS_PLATFORM(dev_priv, INTEL_IRONLAKE)
#define IS_IRONLAKE_M(dev_priv) \
        (IS_PLATFORM(dev_priv, INTEL_IRONLAKE) && IS_MOBILE(dev_priv))
#define IS_IVYBRIDGE(dev_priv)  IS_PLATFORM(dev_priv, INTEL_IVYBRIDGE)
#define IS_IVB_GT1(dev_priv)    (IS_IVYBRIDGE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 1)
#define IS_VALLEYVIEW(dev_priv) IS_PLATFORM(dev_priv, INTEL_VALLEYVIEW)
#define IS_CHERRYVIEW(dev_priv) IS_PLATFORM(dev_priv, INTEL_CHERRYVIEW)
#define IS_HASWELL(dev_priv)    IS_PLATFORM(dev_priv, INTEL_HASWELL)
#define IS_BROADWELL(dev_priv)  IS_PLATFORM(dev_priv, INTEL_BROADWELL)
#define IS_SKYLAKE(dev_priv)    IS_PLATFORM(dev_priv, INTEL_SKYLAKE)
#define IS_BROXTON(dev_priv)    IS_PLATFORM(dev_priv, INTEL_BROXTON)
#define IS_KABYLAKE(dev_priv)   IS_PLATFORM(dev_priv, INTEL_KABYLAKE)
#define IS_GEMINILAKE(dev_priv) IS_PLATFORM(dev_priv, INTEL_GEMINILAKE)
#define IS_COFFEELAKE(dev_priv) IS_PLATFORM(dev_priv, INTEL_COFFEELAKE)
#define IS_CANNONLAKE(dev_priv) IS_PLATFORM(dev_priv, INTEL_CANNONLAKE)
#define IS_ICELAKE(dev_priv)    IS_PLATFORM(dev_priv, INTEL_ICELAKE)
#define IS_ELKHARTLAKE(dev_priv)        IS_PLATFORM(dev_priv, INTEL_ELKHARTLAKE)
#define IS_HSW_EARLY_SDV(dev_priv) (IS_HASWELL(dev_priv) && \
                                    (INTEL_DEVID(dev_priv) & 0xFF00) == 0x0C00)
#define IS_BDW_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_BROADWELL, INTEL_SUBPLATFORM_ULT)
#define IS_BDW_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_BROADWELL, INTEL_SUBPLATFORM_ULX)
#define IS_BDW_GT3(dev_priv)    (IS_BROADWELL(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 3)
#define IS_HSW_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_HASWELL, INTEL_SUBPLATFORM_ULT)
#define IS_HSW_GT3(dev_priv)    (IS_HASWELL(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 3)
#define IS_HSW_GT1(dev_priv)    (IS_HASWELL(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 1)
/* ULX machines are also considered ULT. */
#define IS_HSW_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_HASWELL, INTEL_SUBPLATFORM_ULX)
#define IS_SKL_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_SKYLAKE, INTEL_SUBPLATFORM_ULT)
#define IS_SKL_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_SKYLAKE, INTEL_SUBPLATFORM_ULX)
#define IS_KBL_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_ULT)
#define IS_KBL_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_ULX)
#define IS_AML_ULX(dev_priv) \
        (IS_SUBPLATFORM(dev_priv, INTEL_KABYLAKE, INTEL_SUBPLATFORM_AML) || \
         IS_SUBPLATFORM(dev_priv, INTEL_COFFEELAKE, INTEL_SUBPLATFORM_AML))
#define IS_SKL_GT2(dev_priv)    (IS_SKYLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 2)
#define IS_SKL_GT3(dev_priv)    (IS_SKYLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 3)
#define IS_SKL_GT4(dev_priv)    (IS_SKYLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 4)
#define IS_KBL_GT2(dev_priv)    (IS_KABYLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 2)
#define IS_KBL_GT3(dev_priv)    (IS_KABYLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 3)
#define IS_CFL_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_COFFEELAKE, INTEL_SUBPLATFORM_ULT)
#define IS_CFL_GT2(dev_priv)    (IS_COFFEELAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 2)
#define IS_CFL_GT3(dev_priv)    (IS_COFFEELAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 3)
#define IS_CNL_WITH_PORT_F(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_CANNONLAKE, INTEL_SUBPLATFORM_PORTF)
#define IS_ICL_WITH_PORT_F(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_ICELAKE, INTEL_SUBPLATFORM_PORTF)

#define IS_ALPHA_SUPPORT(intel_info) ((intel_info)->is_alpha_support)

#define SKL_REVID_A0            0x0
#define SKL_REVID_B0            0x1
#define SKL_REVID_C0            0x2
#define SKL_REVID_D0            0x3
#define SKL_REVID_E0            0x4
#define SKL_REVID_F0            0x5
#define SKL_REVID_G0            0x6
#define SKL_REVID_H0            0x7

#define IS_SKL_REVID(p, since, until) (IS_SKYLAKE(p) && IS_REVID(p, since, until))

#define BXT_REVID_A0            0x0
#define BXT_REVID_A1            0x1
#define BXT_REVID_B0            0x3
#define BXT_REVID_B_LAST        0x8
#define BXT_REVID_C0            0x9

#define IS_BXT_REVID(dev_priv, since, until) \
        (IS_BROXTON(dev_priv) && IS_REVID(dev_priv, since, until))

#define KBL_REVID_A0            0x0
#define KBL_REVID_B0            0x1
#define KBL_REVID_C0            0x2
#define KBL_REVID_D0            0x3
#define KBL_REVID_E0            0x4

#define IS_KBL_REVID(dev_priv, since, until) \
        (IS_KABYLAKE(dev_priv) && IS_REVID(dev_priv, since, until))

#define GLK_REVID_A0            0x0
#define GLK_REVID_A1            0x1

#define IS_GLK_REVID(dev_priv, since, until) \
        (IS_GEMINILAKE(dev_priv) && IS_REVID(dev_priv, since, until))

#define CNL_REVID_A0            0x0
#define CNL_REVID_B0            0x1
#define CNL_REVID_C0            0x2

#define IS_CNL_REVID(p, since, until) \
        (IS_CANNONLAKE(p) && IS_REVID(p, since, until))

#define ICL_REVID_A0            0x0
#define ICL_REVID_A2            0x1
#define ICL_REVID_B0            0x3
#define ICL_REVID_B2            0x4
#define ICL_REVID_C0            0x5

#define IS_ICL_REVID(p, since, until) \
        (IS_ICELAKE(p) && IS_REVID(p, since, until))

#define IS_LP(dev_priv) (INTEL_INFO(dev_priv)->is_lp)
#define IS_GEN9_LP(dev_priv)    (IS_GEN(dev_priv, 9) && IS_LP(dev_priv))
#define IS_GEN9_BC(dev_priv)    (IS_GEN(dev_priv, 9) && !IS_LP(dev_priv))

#define HAS_ENGINE(dev_priv, id) (INTEL_INFO(dev_priv)->engine_mask & BIT(id))

#define ENGINE_INSTANCES_MASK(dev_priv, first, count) ({                \
        unsigned int first__ = (first);                                 \
        unsigned int count__ = (count);                                 \
        (INTEL_INFO(dev_priv)->engine_mask &                            \
         GENMASK(first__ + count__ - 1, first__)) >> first__;           \
})
#define VDBOX_MASK(dev_priv) \
        ENGINE_INSTANCES_MASK(dev_priv, VCS0, I915_MAX_VCS)
#define VEBOX_MASK(dev_priv) \
        ENGINE_INSTANCES_MASK(dev_priv, VECS0, I915_MAX_VECS)

#define HAS_LLC(dev_priv)       (INTEL_INFO(dev_priv)->has_llc)
#define HAS_SNOOP(dev_priv)     (INTEL_INFO(dev_priv)->has_snoop)
#define HAS_EDRAM(dev_priv)     ((dev_priv)->edram_size_mb)
#define HAS_WT(dev_priv)        ((IS_HASWELL(dev_priv) || \
                                 IS_BROADWELL(dev_priv)) && HAS_EDRAM(dev_priv))

#define HWS_NEEDS_PHYSICAL(dev_priv)    (INTEL_INFO(dev_priv)->hws_needs_physical)

#define HAS_LOGICAL_RING_CONTEXTS(dev_priv) \
                (INTEL_INFO(dev_priv)->has_logical_ring_contexts)
#define HAS_LOGICAL_RING_ELSQ(dev_priv) \
                (INTEL_INFO(dev_priv)->has_logical_ring_elsq)
#define HAS_LOGICAL_RING_PREEMPTION(dev_priv) \
                (INTEL_INFO(dev_priv)->has_logical_ring_preemption)

#define HAS_EXECLISTS(dev_priv) HAS_LOGICAL_RING_CONTEXTS(dev_priv)

#define INTEL_PPGTT(dev_priv) (INTEL_INFO(dev_priv)->ppgtt_type)
#define HAS_PPGTT(dev_priv) \
        (INTEL_PPGTT(dev_priv) != INTEL_PPGTT_NONE)
#define HAS_FULL_PPGTT(dev_priv) \
        (INTEL_PPGTT(dev_priv) >= INTEL_PPGTT_FULL)

#define HAS_PAGE_SIZES(dev_priv, sizes) ({ \
        GEM_BUG_ON((sizes) == 0); \
        ((sizes) & ~INTEL_INFO(dev_priv)->page_sizes) == 0; \
})

#define HAS_OVERLAY(dev_priv)            (INTEL_INFO(dev_priv)->display.has_overlay)
#define OVERLAY_NEEDS_PHYSICAL(dev_priv) \
                (INTEL_INFO(dev_priv)->display.overlay_needs_physical)

/* Early gen2 have a totally busted CS tlb and require pinned batches. */
#define HAS_BROKEN_CS_TLB(dev_priv)     (IS_I830(dev_priv) || IS_I845G(dev_priv))

/* WaRsDisableCoarsePowerGating:skl,cnl */
#define NEEDS_WaRsDisableCoarsePowerGating(dev_priv) \
        (IS_CANNONLAKE(dev_priv) || \
         IS_SKL_GT3(dev_priv) || IS_SKL_GT4(dev_priv))

#define HAS_GMBUS_IRQ(dev_priv) (INTEL_GEN(dev_priv) >= 4)
#define HAS_GMBUS_BURST_READ(dev_priv) (INTEL_GEN(dev_priv) >= 10 || \
                                        IS_GEMINILAKE(dev_priv) || \
                                        IS_KABYLAKE(dev_priv))

/* With the 945 and later, Y tiling got adjusted so that it was 32 128-byte
 * rows, which changed the alignment requirements and fence programming.
 */
#define HAS_128_BYTE_Y_TILING(dev_priv) (!IS_GEN(dev_priv, 2) && \
                                         !(IS_I915G(dev_priv) || \
                                         IS_I915GM(dev_priv)))
#define SUPPORTS_TV(dev_priv)           (INTEL_INFO(dev_priv)->display.supports_tv)
#define I915_HAS_HOTPLUG(dev_priv)      (INTEL_INFO(dev_priv)->display.has_hotplug)

#define HAS_FW_BLC(dev_priv)    (INTEL_GEN(dev_priv) > 2)
#define HAS_FBC(dev_priv)       (INTEL_INFO(dev_priv)->display.has_fbc)
#define HAS_CUR_FBC(dev_priv)   (!HAS_GMCH(dev_priv) && INTEL_GEN(dev_priv) >= 7)

#define HAS_IPS(dev_priv)       (IS_HSW_ULT(dev_priv) || IS_BROADWELL(dev_priv))

#define HAS_DP_MST(dev_priv)    (INTEL_INFO(dev_priv)->display.has_dp_mst)

#define HAS_DDI(dev_priv)                (INTEL_INFO(dev_priv)->display.has_ddi)
#define HAS_FPGA_DBG_UNCLAIMED(dev_priv) (INTEL_INFO(dev_priv)->has_fpga_dbg)
#define HAS_PSR(dev_priv)                (INTEL_INFO(dev_priv)->display.has_psr)
#define HAS_TRANSCODER_EDP(dev_priv)     (INTEL_INFO(dev_priv)->trans_offsets[TRANSCODER_EDP] != 0)

#define HAS_RC6(dev_priv)                (INTEL_INFO(dev_priv)->has_rc6)
#define HAS_RC6p(dev_priv)               (INTEL_INFO(dev_priv)->has_rc6p)
#define HAS_RC6pp(dev_priv)              (false) /* HW was never validated */

#define HAS_RPS(dev_priv)       (INTEL_INFO(dev_priv)->has_rps)

#define HAS_CSR(dev_priv)       (INTEL_INFO(dev_priv)->display.has_csr)

#define HAS_RUNTIME_PM(dev_priv) (INTEL_INFO(dev_priv)->has_runtime_pm)
#define HAS_64BIT_RELOC(dev_priv) (INTEL_INFO(dev_priv)->has_64bit_reloc)

#define HAS_IPC(dev_priv)                (INTEL_INFO(dev_priv)->display.has_ipc)

/*
 * For now, anything with a GuC requires uCode loading, and then supports
 * command submission once loaded. But these are logically independent
 * properties, so we have separate macros to test them.
 */
#define HAS_GUC(dev_priv)       (INTEL_INFO(dev_priv)->has_guc)
#define HAS_GUC_CT(dev_priv)    (INTEL_INFO(dev_priv)->has_guc_ct)
#define HAS_GUC_UCODE(dev_priv) (HAS_GUC(dev_priv))
#define HAS_GUC_SCHED(dev_priv) (HAS_GUC(dev_priv))

/* For now, anything with a GuC has also HuC */
#define HAS_HUC(dev_priv)       (HAS_GUC(dev_priv))
#define HAS_HUC_UCODE(dev_priv) (HAS_GUC(dev_priv))

/* Having a GuC is not the same as using a GuC */
#define USES_GUC(dev_priv)              intel_uc_is_using_guc(dev_priv)
#define USES_GUC_SUBMISSION(dev_priv)   intel_uc_is_using_guc_submission(dev_priv)
#define USES_HUC(dev_priv)              intel_uc_is_using_huc(dev_priv)

#define HAS_POOLED_EU(dev_priv) (INTEL_INFO(dev_priv)->has_pooled_eu)

#define INTEL_PCH_DEVICE_ID_MASK                0xff80
#define INTEL_PCH_IBX_DEVICE_ID_TYPE            0x3b00
#define INTEL_PCH_CPT_DEVICE_ID_TYPE            0x1c00
#define INTEL_PCH_PPT_DEVICE_ID_TYPE            0x1e00
#define INTEL_PCH_LPT_DEVICE_ID_TYPE            0x8c00
#define INTEL_PCH_LPT_LP_DEVICE_ID_TYPE         0x9c00
#define INTEL_PCH_WPT_DEVICE_ID_TYPE            0x8c80
#define INTEL_PCH_WPT_LP_DEVICE_ID_TYPE         0x9c80
#define INTEL_PCH_SPT_DEVICE_ID_TYPE            0xA100
#define INTEL_PCH_SPT_LP_DEVICE_ID_TYPE         0x9D00
#define INTEL_PCH_KBP_DEVICE_ID_TYPE            0xA280
#define INTEL_PCH_CNP_DEVICE_ID_TYPE            0xA300
#define INTEL_PCH_CNP_LP_DEVICE_ID_TYPE         0x9D80
#define INTEL_PCH_CMP_DEVICE_ID_TYPE            0x0280
#define INTEL_PCH_ICP_DEVICE_ID_TYPE            0x3480
#define INTEL_PCH_P2X_DEVICE_ID_TYPE            0x7100
#define INTEL_PCH_P3X_DEVICE_ID_TYPE            0x7000
#define INTEL_PCH_QEMU_DEVICE_ID_TYPE           0x2900 /* qemu q35 has 2918 */

#define INTEL_PCH_TYPE(dev_priv) ((dev_priv)->pch_type)
#define INTEL_PCH_ID(dev_priv) ((dev_priv)->pch_id)
#define HAS_PCH_ICP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_ICP)
#define HAS_PCH_CNP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_CNP)
#define HAS_PCH_SPT(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_SPT)
#define HAS_PCH_LPT(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_LPT)
#define HAS_PCH_LPT_LP(dev_priv) \
        (INTEL_PCH_ID(dev_priv) == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE || \
         INTEL_PCH_ID(dev_priv) == INTEL_PCH_WPT_LP_DEVICE_ID_TYPE)
#define HAS_PCH_LPT_H(dev_priv) \
        (INTEL_PCH_ID(dev_priv) == INTEL_PCH_LPT_DEVICE_ID_TYPE || \
         INTEL_PCH_ID(dev_priv) == INTEL_PCH_WPT_DEVICE_ID_TYPE)
#define HAS_PCH_CPT(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_CPT)
#define HAS_PCH_IBX(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_IBX)
#define HAS_PCH_NOP(dev_priv) (INTEL_PCH_TYPE(dev_priv) == PCH_NOP)
#define HAS_PCH_SPLIT(dev_priv) (INTEL_PCH_TYPE(dev_priv) != PCH_NONE)

#define HAS_GMCH(dev_priv) (INTEL_INFO(dev_priv)->display.has_gmch)

#define HAS_LSPCON(dev_priv) (INTEL_GEN(dev_priv) >= 9)

/* DPF == dynamic parity feature */
#define HAS_L3_DPF(dev_priv) (INTEL_INFO(dev_priv)->has_l3_dpf)
#define NUM_L3_SLICES(dev_priv) (IS_HSW_GT3(dev_priv) ? \
                                 2 : HAS_L3_DPF(dev_priv))

#define GT_FREQUENCY_MULTIPLIER 50
#define GEN9_FREQ_SCALER 3

#define HAS_DISPLAY(dev_priv) (INTEL_INFO(dev_priv)->num_pipes > 0)

#include "i915_trace.h"

static inline bool intel_vtd_active(void)
{
#ifdef CONFIG_INTEL_IOMMU
        if (intel_iommu_gfx_mapped)
                return true;
#endif
        return false;
}

static inline bool intel_scanout_needs_vtd_wa(struct drm_i915_private *dev_priv)
{
        return INTEL_GEN(dev_priv) >= 6 && intel_vtd_active();
}

static inline bool
intel_ggtt_update_needs_vtd_wa(struct drm_i915_private *dev_priv)
{
        return IS_BROXTON(dev_priv) && intel_vtd_active();
}

/* i915_drv.c */
void __printf(3, 4)
__i915_printk(struct drm_i915_private *dev_priv, const char *level,
              const char *fmt, ...);

#define i915_report_error(dev_priv, fmt, ...)                              \
        __i915_printk(dev_priv, KERN_ERR, fmt, ##__VA_ARGS__)

#ifdef CONFIG_COMPAT
extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
                              unsigned long arg);
#else
#define i915_compat_ioctl NULL
#endif
extern const struct dev_pm_ops i915_pm_ops;

extern int i915_driver_load(struct pci_dev *pdev,
                            const struct pci_device_id *ent);
extern void i915_driver_unload(struct drm_device *dev);

extern void intel_engine_init_hangcheck(struct intel_engine_cs *engine);
extern void intel_hangcheck_init(struct drm_i915_private *dev_priv);
extern unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
extern unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
extern unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
int vlv_force_gfx_clock(struct drm_i915_private *dev_priv, bool on);

u32 intel_calculate_mcr_s_ss_select(struct drm_i915_private *dev_priv);

static inline void i915_queue_hangcheck(struct drm_i915_private *dev_priv)
{
        unsigned long delay;

        if (unlikely(!i915_modparams.enable_hangcheck))
                return;

        /* Don't continually defer the hangcheck so that it is always run at
         * least once after work has been scheduled on any ring. Otherwise,
         * we will ignore a hung ring if a second ring is kept busy.
         */

        delay = round_jiffies_up_relative(DRM_I915_HANGCHECK_JIFFIES);
        queue_delayed_work(system_long_wq,
                           &dev_priv->gpu_error.hangcheck_work, delay);
}

static inline bool intel_gvt_active(struct drm_i915_private *dev_priv)
{
        return dev_priv->gvt;
}

static inline bool intel_vgpu_active(struct drm_i915_private *dev_priv)
{
        return dev_priv->vgpu.active;
}

/* i915_gem.c */
int i915_gem_create_ioctl(struct drm_device *dev, void *data,
                          struct drm_file *file_priv);
int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
                          struct drm_file *file_priv);
int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
                             struct drm_file *file_priv);
int i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file_priv);
int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file);
int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file);
int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
int i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
int i915_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int i915_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
int i915_gem_init_userptr(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv);
int i915_gem_userptr_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file);
int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
                                struct drm_file *file_priv);
int i915_gem_wait_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
void i915_gem_sanitize(struct drm_i915_private *i915);
int i915_gem_init_early(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_early(struct drm_i915_private *dev_priv);
void i915_gem_load_init_fences(struct drm_i915_private *dev_priv);
int i915_gem_freeze(struct drm_i915_private *dev_priv);
int i915_gem_freeze_late(struct drm_i915_private *dev_priv);

void i915_gem_object_init(struct drm_i915_gem_object *obj,
                         const struct drm_i915_gem_object_ops *ops);
struct drm_i915_gem_object *
i915_gem_object_create(struct drm_i915_private *dev_priv, u64 size);
struct drm_i915_gem_object *
i915_gem_object_create_from_data(struct drm_i915_private *dev_priv,
                                 const void *data, size_t size);
void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file);
void i915_gem_free_object(struct drm_gem_object *obj);

static inline void i915_gem_drain_freed_objects(struct drm_i915_private *i915)
{
        if (!atomic_read(&i915->mm.free_count))
                return;

        /* A single pass should suffice to release all the freed objects (along
         * most call paths) , but be a little more paranoid in that freeing
         * the objects does take a little amount of time, during which the rcu
         * callbacks could have added new objects into the freed list, and
         * armed the work again.
         */
        do {
                rcu_barrier();
        } while (flush_work(&i915->mm.free_work));
}

static inline void i915_gem_drain_workqueue(struct drm_i915_private *i915)
{
        /*
         * Similar to objects above (see i915_gem_drain_freed-objects), in
         * general we have workers that are armed by RCU and then rearm
         * themselves in their callbacks. To be paranoid, we need to
         * drain the workqueue a second time after waiting for the RCU
         * grace period so that we catch work queued via RCU from the first
         * pass. As neither drain_workqueue() nor flush_workqueue() report
         * a result, we make an assumption that we only don't require more
         * than 3 passes to catch all _recursive_ RCU delayed work.
         *
         */
        int pass = 3;
        do {
                rcu_barrier();
                i915_gem_drain_freed_objects(i915);
        } while (--pass);
        drain_workqueue(i915->wq);
}

struct i915_vma * __must_check
i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
                         const struct i915_ggtt_view *view,
                         u64 size,
                         u64 alignment,
                         u64 flags);

int i915_gem_object_unbind(struct drm_i915_gem_object *obj);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);

void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);

static inline int __sg_page_count(const struct scatterlist *sg)
{
        return sg->length >> PAGE_SHIFT;
}

struct scatterlist *
i915_gem_object_get_sg(struct drm_i915_gem_object *obj,
                       unsigned int n, unsigned int *offset);

struct page *
i915_gem_object_get_page(struct drm_i915_gem_object *obj,
                         unsigned int n);

struct page *
i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj,
                               unsigned int n);

dma_addr_t
i915_gem_object_get_dma_address(struct drm_i915_gem_object *obj,
                                unsigned long n);

void __i915_gem_object_set_pages(struct drm_i915_gem_object *obj,
                                 struct sg_table *pages,
                                 unsigned int sg_page_sizes);
int __i915_gem_object_get_pages(struct drm_i915_gem_object *obj);

static inline int __must_check
i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
{
        might_lock(&obj->mm.lock);

        if (atomic_inc_not_zero(&obj->mm.pages_pin_count))
                return 0;

        return __i915_gem_object_get_pages(obj);
}

static inline bool
i915_gem_object_has_pages(struct drm_i915_gem_object *obj)
{
        return !IS_ERR_OR_NULL(READ_ONCE(obj->mm.pages));
}

static inline void
__i915_gem_object_pin_pages(struct drm_i915_gem_object *obj)
{
        GEM_BUG_ON(!i915_gem_object_has_pages(obj));

        atomic_inc(&obj->mm.pages_pin_count);
}

static inline bool
i915_gem_object_has_pinned_pages(struct drm_i915_gem_object *obj)
{
        return atomic_read(&obj->mm.pages_pin_count);
}

static inline void
__i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
{
        GEM_BUG_ON(!i915_gem_object_has_pages(obj));
        GEM_BUG_ON(!i915_gem_object_has_pinned_pages(obj));

        atomic_dec(&obj->mm.pages_pin_count);
}

static inline void
i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
{
        __i915_gem_object_unpin_pages(obj);
}

enum i915_mm_subclass { /* lockdep subclass for obj->mm.lock/struct_mutex */
        I915_MM_NORMAL = 0,
        I915_MM_SHRINKER /* called "recursively" from direct-reclaim-esque */
};

int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj,
                                enum i915_mm_subclass subclass);
void __i915_gem_object_truncate(struct drm_i915_gem_object *obj);

enum i915_map_type {
        I915_MAP_WB = 0,
        I915_MAP_WC,
#define I915_MAP_OVERRIDE BIT(31)
        I915_MAP_FORCE_WB = I915_MAP_WB | I915_MAP_OVERRIDE,
        I915_MAP_FORCE_WC = I915_MAP_WC | I915_MAP_OVERRIDE,
};

static inline enum i915_map_type
i915_coherent_map_type(struct drm_i915_private *i915)
{
        return HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC;
}

/**
 * i915_gem_object_pin_map - return a contiguous mapping of the entire object
 * @obj: the object to map into kernel address space
 * @type: the type of mapping, used to select pgprot_t
 *
 * Calls i915_gem_object_pin_pages() to prevent reaping of the object's
 * pages and then returns a contiguous mapping of the backing storage into
 * the kernel address space. Based on the @type of mapping, the PTE will be
 * set to either WriteBack or WriteCombine (via pgprot_t).
 *
 * The caller is responsible for calling i915_gem_object_unpin_map() when the
 * mapping is no longer required.
 *
 * Returns the pointer through which to access the mapped object, or an
 * ERR_PTR() on error.
 */
void *__must_check i915_gem_object_pin_map(struct drm_i915_gem_object *obj,
                                           enum i915_map_type type);

void __i915_gem_object_flush_map(struct drm_i915_gem_object *obj,
                                 unsigned long offset,
                                 unsigned long size);
static inline void i915_gem_object_flush_map(struct drm_i915_gem_object *obj)
{
        __i915_gem_object_flush_map(obj, 0, obj->base.size);
}

/**
 * i915_gem_object_unpin_map - releases an earlier mapping
 * @obj: the object to unmap
 *
 * After pinning the object and mapping its pages, once you are finished
 * with your access, call i915_gem_object_unpin_map() to release the pin
 * upon the mapping. Once the pin count reaches zero, that mapping may be
 * removed.
 */
static inline void i915_gem_object_unpin_map(struct drm_i915_gem_object *obj)
{
        i915_gem_object_unpin_pages(obj);
}

int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
                                    unsigned int *needs_clflush);
int i915_gem_obj_prepare_shmem_write(struct drm_i915_gem_object *obj,
                                     unsigned int *needs_clflush);
#define CLFLUSH_BEFORE  BIT(0)
#define CLFLUSH_AFTER   BIT(1)
#define CLFLUSH_FLAGS   (CLFLUSH_BEFORE | CLFLUSH_AFTER)

static inline void
i915_gem_obj_finish_shmem_access(struct drm_i915_gem_object *obj)
{
        i915_gem_object_unpin_pages(obj);
}

static inline int __must_check
i915_mutex_lock_interruptible(struct drm_device *dev)
{
        return mutex_lock_interruptible(&dev->struct_mutex);
}

int i915_gem_dumb_create(struct drm_file *file_priv,
                         struct drm_device *dev,
                         struct drm_mode_create_dumb *args);
int i915_gem_mmap_gtt(struct drm_file *file_priv, struct drm_device *dev,
                      u32 handle, u64 *offset);
int i915_gem_mmap_gtt_version(void);

void i915_gem_track_fb(struct drm_i915_gem_object *old,
                       struct drm_i915_gem_object *new,
                       unsigned frontbuffer_bits);

int __must_check i915_gem_set_global_seqno(struct drm_device *dev, u32 seqno);

static inline bool __i915_wedged(struct i915_gpu_error *error)
{
        return unlikely(test_bit(I915_WEDGED, &error->flags));
}

static inline bool i915_reset_failed(struct drm_i915_private *i915)
{
        return __i915_wedged(&i915->gpu_error);
}

static inline u32 i915_reset_count(struct i915_gpu_error *error)
{
        return READ_ONCE(error->reset_count);
}

static inline u32 i915_reset_engine_count(struct i915_gpu_error *error,
                                          struct intel_engine_cs *engine)
{
        return READ_ONCE(error->reset_engine_count[engine->id]);
}

void i915_gem_set_wedged(struct drm_i915_private *dev_priv);
bool i915_gem_unset_wedged(struct drm_i915_private *dev_priv);

void i915_gem_init_mmio(struct drm_i915_private *i915);
int __must_check i915_gem_init(struct drm_i915_private *dev_priv);
int __must_check i915_gem_init_hw(struct drm_i915_private *dev_priv);
void i915_gem_init_swizzling(struct drm_i915_private *dev_priv);
void i915_gem_fini(struct drm_i915_private *dev_priv);
int i915_gem_wait_for_idle(struct drm_i915_private *dev_priv,
                           unsigned int flags, long timeout);
void i915_gem_suspend(struct drm_i915_private *dev_priv);
void i915_gem_suspend_late(struct drm_i915_private *dev_priv);
void i915_gem_resume(struct drm_i915_private *dev_priv);
vm_fault_t i915_gem_fault(struct vm_fault *vmf);
int i915_gem_object_wait(struct drm_i915_gem_object *obj,
                         unsigned int flags,
                         long timeout);
int i915_gem_object_wait_priority(struct drm_i915_gem_object *obj,
                                  unsigned int flags,
                                  const struct i915_sched_attr *attr);
#define I915_PRIORITY_DISPLAY I915_USER_PRIORITY(I915_PRIORITY_MAX)

int __must_check
i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write);
int __must_check
i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write);
int __must_check
i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write);
struct i915_vma * __must_check
i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
                                     u32 alignment,
                                     const struct i915_ggtt_view *view,
                                     unsigned int flags);
void i915_gem_object_unpin_from_display_plane(struct i915_vma *vma);
int i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
                                int align);
int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file);
void i915_gem_release(struct drm_device *dev, struct drm_file *file);

int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
                                    enum i915_cache_level cache_level);

struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
                                struct dma_buf *dma_buf);

struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
                                struct drm_gem_object *gem_obj, int flags);

static inline struct i915_hw_ppgtt *
i915_vm_to_ppgtt(struct i915_address_space *vm)
{
        return container_of(vm, struct i915_hw_ppgtt, vm);
}

/* i915_gem_fence_reg.c */
struct drm_i915_fence_reg *
i915_reserve_fence(struct drm_i915_private *dev_priv);
void i915_unreserve_fence(struct drm_i915_fence_reg *fence);

void i915_gem_restore_fences(struct drm_i915_private *dev_priv);

void i915_gem_detect_bit_6_swizzle(struct drm_i915_private *dev_priv);
void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
                                       struct sg_table *pages);
void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
                                         struct sg_table *pages);

static inline struct i915_gem_context *
__i915_gem_context_lookup_rcu(struct drm_i915_file_private *file_priv, u32 id)
{
        return idr_find(&file_priv->context_idr, id);
}

static inline struct i915_gem_context *
i915_gem_context_lookup(struct drm_i915_file_private *file_priv, u32 id)
{
        struct i915_gem_context *ctx;

        rcu_read_lock();
        ctx = __i915_gem_context_lookup_rcu(file_priv, id);
        if (ctx && !kref_get_unless_zero(&ctx->ref))
                ctx = NULL;
        rcu_read_unlock();

        return ctx;
}

int i915_perf_open_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file);
int i915_perf_add_config_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file);
int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
                                  struct drm_file *file);
void i915_oa_init_reg_state(struct intel_engine_cs *engine,
                            struct intel_context *ce,
                            u32 *reg_state);

/* i915_gem_evict.c */
int __must_check i915_gem_evict_something(struct i915_address_space *vm,
                                          u64 min_size, u64 alignment,
                                          unsigned cache_level,
                                          u64 start, u64 end,
                                          unsigned flags);
int __must_check i915_gem_evict_for_node(struct i915_address_space *vm,
                                         struct drm_mm_node *node,
                                         unsigned int flags);
int i915_gem_evict_vm(struct i915_address_space *vm);

void i915_gem_flush_ggtt_writes(struct drm_i915_private *dev_priv);

/* belongs in i915_gem_gtt.h */
static inline void i915_gem_chipset_flush(struct drm_i915_private *dev_priv)
{
        wmb();
        if (INTEL_GEN(dev_priv) < 6)
                intel_gtt_chipset_flush();
}

/* i915_gem_stolen.c */
int i915_gem_stolen_insert_node(struct drm_i915_private *dev_priv,
                                struct drm_mm_node *node, u64 size,
                                unsigned alignment);
int i915_gem_stolen_insert_node_in_range(struct drm_i915_private *dev_priv,
                                         struct drm_mm_node *node, u64 size,
                                         unsigned alignment, u64 start,
                                         u64 end);
void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
                                 struct drm_mm_node *node);
int i915_gem_init_stolen(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_stolen(struct drm_i915_private *dev_priv);
struct drm_i915_gem_object *
i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
                              resource_size_t size);
struct drm_i915_gem_object *
i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,
                                               resource_size_t stolen_offset,
                                               resource_size_t gtt_offset,
                                               resource_size_t size);

/* i915_gem_internal.c */
struct drm_i915_gem_object *
i915_gem_object_create_internal(struct drm_i915_private *dev_priv,
                                phys_addr_t size);

/* i915_gem_shrinker.c */
unsigned long i915_gem_shrink(struct drm_i915_private *i915,
                              unsigned long target,
                              unsigned long *nr_scanned,
                              unsigned flags);
#define I915_SHRINK_PURGEABLE   BIT(0)
#define I915_SHRINK_UNBOUND     BIT(1)
#define I915_SHRINK_BOUND       BIT(2)
#define I915_SHRINK_ACTIVE      BIT(3)
#define I915_SHRINK_VMAPS       BIT(4)
#define I915_SHRINK_WRITEBACK   BIT(5)
unsigned long i915_gem_shrink_all(struct drm_i915_private *i915);
void i915_gem_shrinker_register(struct drm_i915_private *i915);
void i915_gem_shrinker_unregister(struct drm_i915_private *i915);
void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915,
                                    struct mutex *mutex);

/* i915_gem_tiling.c */
static inline bool i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
{
        struct drm_i915_private *dev_priv = to_i915(obj->base.dev);

        return dev_priv->mm.bit_6_swizzle_x == I915_BIT_6_SWIZZLE_9_10_17 &&
                i915_gem_object_is_tiled(obj);
}

u32 i915_gem_fence_size(struct drm_i915_private *dev_priv, u32 size,
                        unsigned int tiling, unsigned int stride);
u32 i915_gem_fence_alignment(struct drm_i915_private *dev_priv, u32 size,
                             unsigned int tiling, unsigned int stride);

const char *i915_cache_level_str(struct drm_i915_private *i915, int type);

/* i915_cmd_parser.c */
int i915_cmd_parser_get_version(struct drm_i915_private *dev_priv);
void intel_engine_init_cmd_parser(struct intel_engine_cs *engine);
void intel_engine_cleanup_cmd_parser(struct intel_engine_cs *engine);
int intel_engine_cmd_parser(struct intel_engine_cs *engine,
                            struct drm_i915_gem_object *batch_obj,
                            struct drm_i915_gem_object *shadow_batch_obj,
                            u32 batch_start_offset,
                            u32 batch_len,
                            bool is_master);

/* i915_perf.c */
extern void i915_perf_init(struct drm_i915_private *dev_priv);
extern void i915_perf_fini(struct drm_i915_private *dev_priv);
extern void i915_perf_register(struct drm_i915_private *dev_priv);
extern void i915_perf_unregister(struct drm_i915_private *dev_priv);

/* i915_suspend.c */
extern int i915_save_state(struct drm_i915_private *dev_priv);
extern int i915_restore_state(struct drm_i915_private *dev_priv);

/* i915_sysfs.c */
void i915_setup_sysfs(struct drm_i915_private *dev_priv);
void i915_teardown_sysfs(struct drm_i915_private *dev_priv);

/* intel_device_info.c */
static inline struct intel_device_info *
mkwrite_device_info(struct drm_i915_private *dev_priv)
{
        return (struct intel_device_info *)INTEL_INFO(dev_priv);
}

/* modesetting */
extern void intel_modeset_init_hw(struct drm_device *dev);
extern int intel_modeset_init(struct drm_device *dev);
extern void intel_modeset_cleanup(struct drm_device *dev);
extern int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv,
                                       bool state);
extern void intel_display_resume(struct drm_device *dev);
extern void i915_redisable_vga(struct drm_i915_private *dev_priv);
extern void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv);
extern bool ironlake_set_drps(struct drm_i915_private *dev_priv, u8 val);
extern void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
extern int intel_set_rps(struct drm_i915_private *dev_priv, u8 val);
extern void intel_rps_mark_interactive(struct drm_i915_private *i915,
                                       bool interactive);
extern bool intel_set_memory_cxsr(struct drm_i915_private *dev_priv,
                                  bool enable);

int i915_reg_read_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file);

extern struct intel_display_error_state *
intel_display_capture_error_state(struct drm_i915_private *dev_priv);
extern void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
                                            struct intel_display_error_state *error);

#define __I915_REG_OP(op__, dev_priv__, ...) \
        intel_uncore_##op__(&(dev_priv__)->uncore, __VA_ARGS__)

#define I915_READ8(reg__)         __I915_REG_OP(read8, dev_priv, (reg__))
#define I915_WRITE8(reg__, val__) __I915_REG_OP(write8, dev_priv, (reg__), (val__))

#define I915_READ16(reg__)         __I915_REG_OP(read16, dev_priv, (reg__))
#define I915_WRITE16(reg__, val__) __I915_REG_OP(write16, dev_priv, (reg__), (val__))
#define I915_READ16_NOTRACE(reg__)         __I915_REG_OP(read16_notrace, dev_priv, (reg__))
#define I915_WRITE16_NOTRACE(reg__, val__) __I915_REG_OP(write16_notrace, dev_priv, (reg__), (val__))

#define I915_READ(reg__)         __I915_REG_OP(read, dev_priv, (reg__))
#define I915_WRITE(reg__, val__) __I915_REG_OP(write, dev_priv, (reg__), (val__))
#define I915_READ_NOTRACE(reg__)         __I915_REG_OP(read_notrace, dev_priv, (reg__))
#define I915_WRITE_NOTRACE(reg__, val__) __I915_REG_OP(write_notrace, dev_priv, (reg__), (val__))

/* Be very careful with read/write 64-bit values. On 32-bit machines, they
 * will be implemented using 2 32-bit writes in an arbitrary order with
 * an arbitrary delay between them. This can cause the hardware to
 * act upon the intermediate value, possibly leading to corruption and
 * machine death. For this reason we do not support I915_WRITE64, or
 * dev_priv->uncore.funcs.mmio_writeq.
 *
 * When reading a 64-bit value as two 32-bit values, the delay may cause
 * the two reads to mismatch, e.g. a timestamp overflowing. Also note that
 * occasionally a 64-bit register does not actualy support a full readq
 * and must be read using two 32-bit reads.
 *
 * You have been warned.
 */
#define I915_READ64(reg__)      __I915_REG_OP(read64, dev_priv, (reg__))
#define I915_READ64_2x32(lower_reg__, upper_reg__) \
        __I915_REG_OP(read64_2x32, dev_priv, (lower_reg__), (upper_reg__))

#define POSTING_READ(reg__)     __I915_REG_OP(posting_read, dev_priv, (reg__))
#define POSTING_READ16(reg__)   __I915_REG_OP(posting_read16, dev_priv, (reg__))

/* These are untraced mmio-accessors that are only valid to be used inside
 * critical sections, such as inside IRQ handlers, where forcewake is explicitly
 * controlled.
 *
 * Think twice, and think again, before using these.
 *
 * As an example, these accessors can possibly be used between:
 *
 * spin_lock_irq(&dev_priv->uncore.lock);
 * intel_uncore_forcewake_get__locked();
 *
 * and
 *
 * intel_uncore_forcewake_put__locked();
 * spin_unlock_irq(&dev_priv->uncore.lock);
 *
 *
 * Note: some registers may not need forcewake held, so
 * intel_uncore_forcewake_{get,put} can be omitted, see
 * intel_uncore_forcewake_for_reg().
 *
 * Certain architectures will die if the same cacheline is concurrently accessed
 * by different clients (e.g. on Ivybridge). Access to registers should
 * therefore generally be serialised, by either the dev_priv->uncore.lock or
 * a more localised lock guarding all access to that bank of registers.
 */
#define I915_READ_FW(reg__) __I915_REG_OP(read_fw, dev_priv, (reg__))
#define I915_WRITE_FW(reg__, val__) __I915_REG_OP(write_fw, dev_priv, (reg__), (val__))
#define I915_WRITE64_FW(reg__, val__) __I915_REG_OP(write64_fw, dev_priv, (reg__), (val__))
#define POSTING_READ_FW(reg__) __I915_REG_OP(posting_read_fw, dev_priv, (reg__))

/* "Broadcast RGB" property */
#define INTEL_BROADCAST_RGB_AUTO 0
#define INTEL_BROADCAST_RGB_FULL 1
#define INTEL_BROADCAST_RGB_LIMITED 2

void i915_memcpy_init_early(struct drm_i915_private *dev_priv);
bool i915_memcpy_from_wc(void *dst, const void *src, unsigned long len);

/* The movntdqa instructions used for memcpy-from-wc require 16-byte alignment,
 * as well as SSE4.1 support. i915_memcpy_from_wc() will report if it cannot
 * perform the operation. To check beforehand, pass in the parameters to
 * to i915_can_memcpy_from_wc() - since we only care about the low 4 bits,
 * you only need to pass in the minor offsets, page-aligned pointers are
 * always valid.
 *
 * For just checking for SSE4.1, in the foreknowledge that the future use
 * will be correctly aligned, just use i915_has_memcpy_from_wc().
 */
#define i915_can_memcpy_from_wc(dst, src, len) \
        i915_memcpy_from_wc((void *)((unsigned long)(dst) | (unsigned long)(src) | (len)), NULL, 0)

#define i915_has_memcpy_from_wc() \
        i915_memcpy_from_wc(NULL, NULL, 0)

/* i915_mm.c */
int remap_io_mapping(struct vm_area_struct *vma,
                     unsigned long addr, unsigned long pfn, unsigned long size,
                     struct io_mapping *iomap);

static inline int intel_hws_csb_write_index(struct drm_i915_private *i915)
{
        if (INTEL_GEN(i915) >= 10)
                return CNL_HWS_CSB_WRITE_INDEX;
        else
                return I915_HWS_CSB_WRITE_INDEX;
}

static inline u32 i915_scratch_offset(const struct drm_i915_private *i915)
{
        return i915_ggtt_offset(i915->gt.scratch);
}

static inline void add_taint_for_CI(unsigned int taint)
{
        /*
         * The system is "ok", just about surviving for the user, but
         * CI results are now unreliable as the HW is very suspect.
         * CI checks the taint state after every test and will reboot
         * the machine if the kernel is tainted.
         */
        add_taint(taint, LOCKDEP_STILL_OK);
}

#endif