[linux-block.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/dma-resv.h>
#include <linux/shmem_fs.h>
#include <linux/stackdepot.h>
#include <linux/xarray.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_atomic.h>
#include <drm/drm_connector.h>
#include <drm/i915_mei_hdcp_interface.h>

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

#include "display/intel_bios.h"
#include "display/intel_display.h"
#include "display/intel_display_power.h"
#include "display/intel_dpll_mgr.h"
#include "display/intel_dsb.h"
#include "display/intel_frontbuffer.h"
#include "display/intel_global_state.h"
#include "display/intel_gmbus.h"
#include "display/intel_opregion.h"

#include "gem/i915_gem_context_types.h"
#include "gem/i915_gem_shrinker.h"
#include "gem/i915_gem_stolen.h"

#include "gt/intel_lrc.h"
#include "gt/intel_engine.h"
#include "gt/intel_gt_types.h"
#include "gt/intel_workarounds.h"
#include "gt/uc/intel_uc.h"

#include "intel_device_info.h"
#include "intel_pch.h"
#include "intel_runtime_pm.h"
#include "intel_memory_region.h"
#include "intel_uncore.h"
#include "intel_wakeref.h"
#include "intel_wopcm.h"

#include "i915_gem.h"
#include "i915_gem_gtt.h"
#include "i915_gpu_error.h"
#include "i915_perf_types.h"
#include "i915_request.h"
#include "i915_scheduler.h"
#include "gt/intel_timeline.h"
#include "i915_vma.h"
#include "i915_irq.h"

#include "intel_region_lmem.h"

/* General customization:
 */

#define DRIVER_NAME             "i915"
#define DRIVER_DESC             "Intel Graphics"
#define DRIVER_DATE             "20200515"
#define DRIVER_TIMESTAMP        1589543364

struct drm_i915_gem_object;

/*
 * The code assumes that the hpd_pins below have consecutive values and
 * starting with HPD_PORT_A, the HPD pin associated with any port can be
 * retrieved by adding the corresponding port (or phy) enum value to
 * HPD_PORT_A in most cases. For example:
 * HPD_PORT_C = HPD_PORT_A + PHY_C - PHY_A
 */
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_PORT_G,
        HPD_PORT_H,
        HPD_PORT_I,

        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 delayed_work hotplug_work;

        const u32 *hpd, *pch_hpd;

        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;
        u32 retry_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;

        union {
                struct drm_file *file;
                struct rcu_head rcu;
        };

        struct {
                spinlock_t lock;
                struct list_head request_list;
        } mm;

        struct xarray context_xa;
        struct xarray vm_xa;

        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_cdclk_config;
struct intel_cdclk_state;
struct intel_cdclk_vals;
struct intel_initial_plane_config;
struct intel_crtc;
struct intel_limit;
struct dpll;

struct drm_i915_display_funcs {
        void (*get_cdclk)(struct drm_i915_private *dev_priv,
                          struct intel_cdclk_config *cdclk_config);
        void (*set_cdclk)(struct drm_i915_private *dev_priv,
                          const struct intel_cdclk_config *cdclk_config,
                          enum pipe pipe);
        int (*bw_calc_min_cdclk)(struct intel_atomic_state *state);
        int (*get_fifo_size)(struct drm_i915_private *dev_priv,
                             enum i9xx_plane_id i9xx_plane);
        int (*compute_pipe_wm)(struct intel_crtc_state *crtc_state);
        int (*compute_intermediate_wm)(struct intel_crtc_state *crtc_state);
        void (*initial_watermarks)(struct intel_atomic_state *state,
                                   struct intel_crtc *crtc);
        void (*atomic_update_watermarks)(struct intel_atomic_state *state,
                                         struct intel_crtc *crtc);
        void (*optimize_watermarks)(struct intel_atomic_state *state,
                                    struct intel_crtc *crtc);
        int (*compute_global_watermarks)(struct intel_atomic_state *state);
        void (*update_wm)(struct intel_crtc *crtc);
        int (*modeset_calc_cdclk)(struct intel_cdclk_state *state);
        u8 (*calc_voltage_level)(int cdclk);
        /* 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_atomic_state *state,
                            struct intel_crtc *crtc);
        void (*crtc_disable)(struct intel_atomic_state *state,
                             struct intel_crtc *crtc);
        void (*commit_modeset_enables)(struct intel_atomic_state *state);
        void (*commit_modeset_disables)(struct intel_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);
        void (*read_luts)(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[20];
        u32 mmiodata[20];
        u32 dc_state;
        u32 target_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;
        struct intel_crtc *crtc;

        struct drm_mm_node compressed_fb;
        struct drm_mm_node *compressed_llb;

        bool false_color;

        bool active;
        bool activated;
        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 {
                        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;
                        u64 modifier;
                } fb;
                u16 gen9_wa_cfb_stride;
                s8 fence_id;
        } 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 {
                        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;
                u16 gen9_wa_cfb_stride;
                s8 fence_id;
                bool plane_visible;
        } 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;
        enum transcoder transcoder;
        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;
        bool dc3co_enabled;
        u32 dc3co_exit_delay;
        struct delayed_work dc3co_work;
        bool force_mode_changed;
        struct drm_dp_vsc_sdp vsc;
};

#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];
        u32 savePCH_PORT_HOTPLUG;
        u16 saveGCDGMBUS;
};

struct vlv_s0ix_state;

#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 objects which are purgeable.
         */
        struct list_head purge_list;

        /**
         * List of objects which have allocated pages and are shrinkable.
         */
        struct list_head shrink_list;

        /**
         * List of objects which are pending destruction.
         */
        struct llist_head free_list;
        struct work_struct free_work;
        /**
         * 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;

        struct intel_memory_region *regions[INTEL_REGION_UNKNOWN];

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

        /**
         * 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;

        /* shrinker accounting, also useful for userland debugging */
        u64 shrink_memory;
        u32 shrink_count;
};

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

unsigned long i915_fence_context_timeout(const struct drm_i915_private *i915,
                                         u64 context);

static inline unsigned long
i915_fence_timeout(const struct drm_i915_private *i915)
{
        return i915_fence_context_timeout(i915, U64_MAX);
}

/* Amount of SAGV/QGV points, BSpec precisely defines this */
#define I915_NUM_QGV_POINTS 8

struct ddi_vbt_port_info {
        /* Non-NULL if port present. */
        const struct child_device_config *child;

        int max_tmds_clock;

        /* This is an index in the HDMI/DVI DDI buffer translation table. */
        u8 hdmi_level_shift;
        u8 hdmi_level_shift_set: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;

        struct list_head display_devices;

        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 ilk_wm_values {
        u32 wm_pipe[3];
        u32 wm_lp[3];
        u32 wm_lp_spr[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 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 {
        struct mutex lock; /* serialises sending of g2v_notify command pkts */
        bool active;
        u32 caps;
};

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

struct i915_selftest_stash {
        atomic_t counter;
};

struct drm_i915_private {
        struct drm_device drm;

        /* FIXME: Device release actions should all be moved to drmm_ */
        bool do_release;

        /* i915 device parameters */
        struct i915_params params;

        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 intel_uncore_mmio_debug mmio_debug;

        struct i915_virtual_gpu vgpu;

        struct intel_gvt *gvt;

        struct intel_wopcm wopcm;

        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;

        u32 hsw_psr_mmio_adjust;

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

        u32 pps_mmio_base;

        wait_queue_head_t gmbus_wait_queue;

        struct pci_dev *bridge_dev;

        struct rb_root uabi_engines;

        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 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;

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

        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 hpll_freq;
        unsigned int fdi_pll_freq;
        unsigned int czclk_freq;

        struct {
                /* The current hardware cdclk configuration */
                struct intel_cdclk_config hw;

                /* cdclk, divider, and ratio table from bspec */
                const struct intel_cdclk_vals *table;

                struct intel_global_obj obj;
        } cdclk;

        struct {
                /* The current hardware dbuf configuration */
                u8 enabled_slices;

                struct intel_global_obj obj;
        } dbuf;

        /**
         * 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;
        /* unbound hipri wq for page flips/plane updates */
        struct workqueue_struct *flip_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;

        /* Kernel Modesetting */

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

        /**
         * dpll and cdclk state is protected by connection_mutex
         * dpll.lock serializes intel_{prepare,enable,disable}_shared_dpll.
         * Must be global rather than per dpll, because on some platforms plls
         * share registers.
         */
        struct {
                struct mutex lock;

                int num_shared_dpll;
                struct intel_shared_dpll shared_dplls[I915_NUM_PLLS];
                const struct intel_dpll_mgr *mgr;

                struct {
                        int nssc;
                        int ssc;
                } ref_clks;
        } dpll;

        struct list_head global_obj_list;

        /*
         * For reading active_pipes holding any crtc lock is
         * sufficient, for writing must hold all of them.
         */
        u8 active_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;

        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;

        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;
        u32 audio_freq_cntrl;

        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;

        u32 sagv_block_time_us;

        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 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
                 * crtc_state->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).
                 *
                 * FIXME get rid of this.
                 */
                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 intel_bw_info {
                /* for each QGV point */
                unsigned int deratedbw[I915_NUM_QGV_POINTS];
                u8 num_qgv_points;
                u8 num_planes;
        } max_bw[6];

        struct intel_global_obj bw_obj;

        struct intel_runtime_pm runtime_pm;

        struct i915_perf perf;

        /* Abstract the submission mechanism (legacy ringbuffer or execlists) away */
        struct intel_gt gt;

        struct {
                struct i915_gem_contexts {
                        spinlock_t lock; /* locks list */
                        struct list_head list;

                        struct llist_head free_list;
                        struct work_struct free_work;
                } contexts;

                /*
                 * We replace the local file with a global mappings as the
                 * backing storage for the mmap is on the device and not
                 * on the struct file, and we do not want to prolong the
                 * lifetime of the local fd. To minimise the number of
                 * anonymous inodes we create, we use a global singleton to
                 * share the global mapping.
                 */
                struct file *mmap_singleton;
        } gem;

        u8 pch_ssc_use;

        /* For i915gm/i945gm vblank irq workaround */
        u8 vblank_enabled;

        /* 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;

        I915_SELFTEST_DECLARE(struct i915_selftest_stash selftest;)

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

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 dev_get_drvdata(kdev);
}

static inline struct drm_i915_private *pdev_to_i915(struct pci_dev *pdev)
{
        return pci_get_drvdata(pdev);
}

/* 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__, gt__, mask__, tmp__) \
        for ((tmp__) = (mask__) & INTEL_INFO((gt__)->i915)->engine_mask; \
             (tmp__) ? \
             ((engine__) = (gt__)->engine[__mask_next_bit(tmp__)]), 1 : \
             0;)

#define rb_to_uabi_engine(rb) \
        rb_entry_safe(rb, struct intel_engine_cs, uabi_node)

#define for_each_uabi_engine(engine__, i915__) \
        for ((engine__) = rb_to_uabi_engine(rb_first(&(i915__)->uabi_engines));\
             (engine__); \
             (engine__) = rb_to_uabi_engine(rb_next(&(engine__)->uabi_node)))

#define for_each_uabi_class_engine(engine__, class__, i915__) \
        for ((engine__) = intel_engine_lookup_user((i915__), (class__), 0); \
             (engine__) && (engine__)->uabi_class == (class__); \
             (engine__) = rb_to_uabi_engine(rb_next(&(engine__)->uabi_node)))

#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))

#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))

#define HAS_DSB(dev_priv)       (INTEL_INFO(dev_priv)->display.has_dsb)

/*
 * 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_DGFX(dev_priv)   (INTEL_INFO(dev_priv)->is_dgfx)

#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_COMETLAKE(dev_priv)  IS_PLATFORM(dev_priv, INTEL_COMETLAKE)
#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_TIGERLAKE(dev_priv)  IS_PLATFORM(dev_priv, INTEL_TIGERLAKE)
#define IS_ROCKETLAKE(dev_priv) IS_PLATFORM(dev_priv, INTEL_ROCKETLAKE)
#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_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_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_COFFEELAKE, INTEL_SUBPLATFORM_ULX)
#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_CML_ULT(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_COMETLAKE, INTEL_SUBPLATFORM_ULT)
#define IS_CML_ULX(dev_priv) \
        IS_SUBPLATFORM(dev_priv, INTEL_COMETLAKE, INTEL_SUBPLATFORM_ULX)
#define IS_CML_GT2(dev_priv)    (IS_COMETLAKE(dev_priv) && \
                                 INTEL_INFO(dev_priv)->gt == 2)

#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 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 GLK_REVID_A2            0x2
#define GLK_REVID_B0            0x3

#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 EHL_REVID_A0            0x0

#define IS_EHL_REVID(p, since, until) \
        (IS_ELKHARTLAKE(p) && IS_REVID(p, since, until))

#define TGL_REVID_A0            0x0
#define TGL_REVID_B0            0x1
#define TGL_REVID_C0            0x2

#define IS_TGL_REVID(p, since, until) \
        (IS_TIGERLAKE(p) && IS_REVID(p, since, until))

#define RKL_REVID_A0            0x0
#define RKL_REVID_B0            0x1
#define RKL_REVID_C0            0x4

#define IS_RKL_REVID(p, since, until) \
        (IS_ROCKETLAKE(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)

/*
 * The Gen7 cmdparser copies the scanned buffer to the ggtt for execution
 * All later gens can run the final buffer from the ppgtt
 */
#define CMDPARSER_USES_GGTT(dev_priv) IS_GEN(dev_priv, 7)

#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_SECURE_BATCHES(dev_priv) (INTEL_GEN(dev_priv) < 6)
#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))

#define NEEDS_RC6_CTX_CORRUPTION_WA(dev_priv)   \
        (IS_BROADWELL(dev_priv) || IS_GEN(dev_priv, 9))

/* 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_PSR_HW_TRACKING(dev_priv) \
        (INTEL_INFO(dev_priv)->display.has_psr_hw_tracking)
#define HAS_TRANSCODER(dev_priv, trans)  ((INTEL_INFO(dev_priv)->cpu_transcoder_mask & BIT(trans)) != 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)

#define HAS_REGION(i915, i) (INTEL_INFO(i915)->memory_regions & (i))
#define HAS_LMEM(i915) HAS_REGION(i915, REGION_LMEM)

#define HAS_GT_UC(dev_priv)     (INTEL_INFO(dev_priv)->has_gt_uc)

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

#define HAS_GLOBAL_MOCS_REGISTERS(dev_priv)     (INTEL_INFO(dev_priv)->has_global_mocs)


#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 INTEL_NUM_PIPES(dev_priv) (hweight8(INTEL_INFO(dev_priv)->pipe_mask))

#define HAS_DISPLAY(dev_priv) (INTEL_INFO(dev_priv)->pipe_mask != 0)

/* Only valid when HAS_DISPLAY() is true */
#define INTEL_DISPLAY_ENABLED(dev_priv) \
        (drm_WARN_ON(&(dev_priv)->drm, !HAS_DISPLAY(dev_priv)), !(dev_priv)->params.disable_display)

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 */
extern const struct dev_pm_ops i915_pm_ops;

int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
void i915_driver_remove(struct drm_i915_private *i915);

int i915_resume_switcheroo(struct drm_i915_private *i915);
int i915_suspend_switcheroo(struct drm_i915_private *i915, pm_message_t state);

int i915_getparam_ioctl(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);

/* i915_gem.c */
int i915_gem_init_userptr(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv);
void i915_gem_init_early(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_early(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);

struct intel_memory_region *i915_gem_shmem_setup(struct drm_i915_private *i915);

static inline void i915_gem_drain_freed_objects(struct drm_i915_private *i915)
{
        /*
         * 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.
         */
        while (atomic_read(&i915->mm.free_count)) {
                flush_work(&i915->mm.free_work);
                rcu_barrier();
        }
}

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 {
                flush_workqueue(i915->wq);
                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,
                           unsigned long flags);
#define I915_GEM_OBJECT_UNBIND_ACTIVE BIT(0)
#define I915_GEM_OBJECT_UNBIND_BARRIER BIT(1)
#define I915_GEM_OBJECT_UNBIND_TEST BIT(2)

void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv);

int i915_gem_dumb_create(struct drm_file *file_priv,
                         struct drm_device *dev,
                         struct drm_mode_create_dumb *args);

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

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

static inline u32 i915_reset_engine_count(struct i915_gpu_error *error,
                                          const struct intel_engine_cs *engine)
{
        return atomic_read(&error->reset_engine_count[engine->uabi_class]);
}

int __must_check i915_gem_init(struct drm_i915_private *dev_priv);
void i915_gem_driver_register(struct drm_i915_private *i915);
void i915_gem_driver_unregister(struct drm_i915_private *i915);
void i915_gem_driver_remove(struct drm_i915_private *dev_priv);
void i915_gem_driver_release(struct drm_i915_private *dev_priv);
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);

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_gem_object *gem_obj, int flags);

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

/* i915_gem_evict.c */
int __must_check i915_gem_evict_something(struct i915_address_space *vm,
                                          u64 min_size, u64 alignment,
                                          unsigned long color,
                                          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);

/* 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_tiling.c */
static inline bool i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
{
        struct drm_i915_private *i915 = to_i915(obj->base.dev);

        return i915->ggtt.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 i915_vma *batch,
                            u32 batch_offset,
                            u32 batch_length,
                            struct i915_vma *shadow,
                            bool trampoline);
#define I915_CMD_PARSER_TRAMPOLINE_SIZE 8

/* 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);
}

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

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

#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 POSTING_READ(reg__)     __I915_REG_OP(posting_read, 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__))

/* 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);
int remap_io_sg(struct vm_area_struct *vma,
                unsigned long addr, unsigned long size,
                struct scatterlist *sgl, resource_size_t iobase);

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

static inline u64 i915_cs_timestamp_ns_to_ticks(struct drm_i915_private *i915, u64 val)
{
        return DIV_ROUND_UP_ULL(val * RUNTIME_INFO(i915)->cs_timestamp_frequency_hz,
                                1000000000);
}

static inline u64 i915_cs_timestamp_ticks_to_ns(struct drm_i915_private *i915, u64 val)
{
        return div_u64(val * 1000000000,
                       RUNTIME_INFO(i915)->cs_timestamp_frequency_hz);
}

#endif