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 <asm/hypervisor.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/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 <drm/ttm/ttm_device.h>

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

#include "display/intel_bios.h"
#include "display/intel_cdclk.h"
#include "display/intel_display.h"
#include "display/intel_display_power.h"
#include "display/intel_dmc.h"
#include "display/intel_dpll_mgr.h"
#include "display/intel_dsb.h"
#include "display/intel_fbc.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 "gem/i915_gem_lmem.h"

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

#include "intel_device_info.h"
#include "intel_memory_region.h"
#include "intel_pch.h"
#include "intel_pm_types.h"
#include "intel_runtime_pm.h"
#include "intel_step.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"


/* General customization:
 */

#define DRIVER_NAME		"i915"
#define DRIVER_DESC		"Intel Graphics"
#define DRIVER_DATE		"20201103"
#define DRIVER_TIMESTAMP	1604406085

struct drm_i915_gem_object;

/* 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 drm_i915_file_private {
	struct drm_i915_private *dev_priv;

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

	/** @proto_context_lock: Guards all struct i915_gem_proto_context
	 * operations
	 *
	 * This not only guards @proto_context_xa, but is always held
	 * whenever we manipulate any struct i915_gem_proto_context,
	 * including finalizing it on first actual use of the GEM context.
	 *
	 * See i915_gem_proto_context.
	 */
	struct mutex proto_context_lock;

	/** @proto_context_xa: xarray of struct i915_gem_proto_context
	 *
	 * Historically, the context uAPI allowed for two methods of
	 * setting context parameters: SET_CONTEXT_PARAM and
	 * CONTEXT_CREATE_EXT_SETPARAM.  The former is allowed to be called
	 * at any time while the later happens as part of
	 * GEM_CONTEXT_CREATE.  Everything settable via one was settable
	 * via the other.  While some params are fairly simple and setting
	 * them on a live context is harmless such as the context priority,
	 * others are far trickier such as the VM or the set of engines.
	 * In order to swap out the VM, for instance, we have to delay
	 * until all current in-flight work is complete, swap in the new
	 * VM, and then continue.  This leads to a plethora of potential
	 * race conditions we'd really rather avoid.
	 *
	 * We have since disallowed setting these more complex parameters
	 * on active contexts.  This works by delaying the creation of the
	 * actual context until after the client is done configuring it
	 * with SET_CONTEXT_PARAM.  From the perspective of the client, it
	 * has the same u32 context ID the whole time.  From the
	 * perspective of i915, however, it's a struct i915_gem_proto_context
	 * right up until the point where we attempt to do something which
	 * the proto-context can't handle.  Then the struct i915_gem_context
	 * gets created.
	 *
	 * This is accomplished via a little xarray dance.  When
	 * GEM_CONTEXT_CREATE is called, we create a struct
	 * i915_gem_proto_context, reserve a slot in @context_xa but leave
	 * it NULL, and place the proto-context in the corresponding slot
	 * in @proto_context_xa.  Then, in i915_gem_context_lookup(), we
	 * first check @context_xa.  If it's there, we return the struct
	 * i915_gem_context and we're done.  If it's not, we look in
	 * @proto_context_xa and, if we find it there, we create the actual
	 * context and kill the proto-context.
	 *
	 * In order for this dance to work properly, everything which ever
	 * touches a struct i915_gem_proto_context is guarded by
	 * @proto_context_lock, including context creation.  Yes, this
	 * means context creation now takes a giant global lock but it
	 * can't really be helped and that should never be on any driver's
	 * fast-path anyway.
	 */
	struct xarray proto_context_xa;

	/** @context_xa: xarray of fully created i915_gem_context
	 *
	 * Write access to this xarray is guarded by @proto_context_lock.
	 * Otherwise, writers may race with finalize_create_context_locked().
	 *
	 * See @proto_context_xa.
	 */
	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_funcs;
struct intel_cdclk_state;
struct intel_cdclk_vals;
struct intel_initial_plane_config;
struct intel_crtc;
struct intel_limit;
struct dpll;

/* functions used internal in intel_pm.c */
struct drm_i915_clock_gating_funcs {
	void (*init_clock_gating)(struct drm_i915_private *dev_priv);
};

/* functions used for watermark calcs for display. */
struct drm_i915_wm_disp_funcs {
	/* update_wm is for legacy wm management */
	void (*update_wm)(struct drm_i915_private *dev_priv);
	int (*compute_pipe_wm)(struct intel_atomic_state *state,
			       struct intel_crtc *crtc);
	int (*compute_intermediate_wm)(struct intel_atomic_state *state,
				       struct intel_crtc *crtc);
	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);
};

struct intel_color_funcs {
	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_hotplug_funcs {
	void (*hpd_irq_setup)(struct drm_i915_private *dev_priv);
};

struct intel_fdi_funcs {
	void (*fdi_link_train)(struct intel_crtc *crtc,
			       const struct intel_crtc_state *crtc_state);
};

struct intel_dpll_funcs {
	int (*crtc_compute_clock)(struct intel_crtc_state *crtc_state);
};

struct drm_i915_display_funcs {
	/* 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 *);
	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);
};

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

/*
 * 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;
};

#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)
#define QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK (1<<8)

struct intel_fbdev;

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 saveSWF0[16];
	u32 saveSWF1[16];
	u32 saveSWF3[3];
	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 {
	/*
	 * Shortcut for the stolen region. This points to either
	 * INTEL_REGION_STOLEN_SMEM for integrated platforms, or
	 * INTEL_REGION_STOLEN_LMEM for discrete, or NULL if the device doesn't
	 * support stolen.
	 */
	struct intel_memory_region *stolen_region;
	/** 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;

	/**
	 * 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;

#ifdef CONFIG_MMU_NOTIFIER
	/**
	 * notifier_lock for mmu notifiers, memory may not be allocated
	 * while holding this lock.
	 */
	rwlock_t notifier_lock;
#endif

	/* 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

#define HAS_HW_SAGV_WM(i915) (DISPLAY_VER(i915) >= 13 && !IS_DGFX(i915))

/* Amount of PSF GV points, BSpec precisely defines this */
#define I915_NUM_PSF_GV_POINTS 3

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 {
	/* bdb version */
	u16 version;

	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;
		bool hobl;
	} 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;
		u16 brightness_precision_bits;
		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 intel_bios_encoder_data *ports[I915_MAX_PORTS]; /* Non-NULL if port present. */
	struct sdvo_device_mapping sdvo_mappings[2];
};

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 i915_selftest_stash {
	atomic_t counter;
	struct ida mock_region_instances;
};

/* intel_audio.c private */
struct intel_audio_funcs;
struct intel_audio_private {
	/* Display internal audio functions */
	const struct intel_audio_funcs *funcs;

	/* hda/i915 audio component */
	struct i915_audio_component *component;
	bool component_registered;
	/* mutex for audio/video sync */
	struct mutex mutex;
	int power_refcount;
	u32 freq_cntrl;

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

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

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_dmc dmc;

	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 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;

	/* 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[I915_MAX_FBCS];
	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;

	/* pm private clock gating functions */
	const struct drm_i915_clock_gating_funcs *clock_gating_funcs;

	/* pm display functions */
	const struct drm_i915_wm_disp_funcs *wm_disp;

	/* irq display functions */
	const struct intel_hotplug_funcs *hotplug_funcs;

	/* fdi display functions */
	const struct intel_fdi_funcs *fdi_funcs;

	/* display pll funcs */
	const struct intel_dpll_funcs *dpll_funcs;

	/* Display functions */
	const struct drm_i915_display_funcs *display;

	/* Display internal color functions */
	const struct intel_color_funcs *color_funcs;

	/* Display CDCLK functions */
	const struct intel_cdclk_funcs *cdclk_funcs;

	/* 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;

	/* Kernel Modesetting */

	/**
	 * 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;

	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;

	/*
	 * HTI (aka HDPORT) state read during initial hw readout.  Most
	 * platforms don't have HTI, so this will just stay 0.  Those that do
	 * will use this later to figure out which PLLs and PHYs are unavailable
	 * for driver usage.
	 */
	u32 hti_state;

	/*
	 * 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_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;

	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;
	} wm;

	struct dram_info {
		bool wm_lv_0_adjust_needed;
		u8 num_channels;
		bool symmetric_memory;
		enum intel_dram_type {
			INTEL_DRAM_UNKNOWN,
			INTEL_DRAM_DDR3,
			INTEL_DRAM_DDR4,
			INTEL_DRAM_LPDDR3,
			INTEL_DRAM_LPDDR4,
			INTEL_DRAM_DDR5,
			INTEL_DRAM_LPDDR5,
		} type;
		u8 num_qgv_points;
		u8 num_psf_gv_points;
	} dram_info;

	struct intel_bw_info {
		/* for each QGV point */
		unsigned int deratedbw[I915_NUM_QGV_POINTS];
		/* for each PSF GV point */
		unsigned int psf_bw[I915_NUM_PSF_GV_POINTS];
		u8 num_qgv_points;
		u8 num_psf_gv_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;
		} 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 framestart_delay;

	/* Window2 specifies time required to program DSB (Window2) in number of scan lines */
	u8 window2_delay;

	u8 pch_ssc_use;

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

	bool irq_enabled;

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

	bool ipc_enabled;

	struct intel_audio_private 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;

	/* The TTM device structure. */
	struct ttm_device bdev;

	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__) & (gt__)->info.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_DEVID(dev_priv)	(RUNTIME_INFO(dev_priv)->device_id)

#define IP_VER(ver, rel)		((ver) << 8 | (rel))

#define GRAPHICS_VER(i915)		(INTEL_INFO(i915)->graphics.ver)
#define GRAPHICS_VER_FULL(i915)		IP_VER(INTEL_INFO(i915)->graphics.ver, \
					       INTEL_INFO(i915)->graphics.rel)
#define IS_GRAPHICS_VER(i915, from, until) \
	(GRAPHICS_VER(i915) >= (from) && GRAPHICS_VER(i915) <= (until))

#define MEDIA_VER(i915)			(INTEL_INFO(i915)->media.ver)
#define MEDIA_VER_FULL(i915)		IP_VER(INTEL_INFO(i915)->media.arch, \
					       INTEL_INFO(i915)->media.rel)
#define IS_MEDIA_VER(i915, from, until) \
	(MEDIA_VER(i915) >= (from) && MEDIA_VER(i915) <= (until))

#define DISPLAY_VER(i915)	(INTEL_INFO(i915)->display.ver)
#define IS_DISPLAY_VER(i915, from, until) \
	(DISPLAY_VER(i915) >= (from) && DISPLAY_VER(i915) <= (until))

#define INTEL_REVID(dev_priv)	(to_pci_dev((dev_priv)->drm.dev)->revision)

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

#define INTEL_DISPLAY_STEP(__i915) (RUNTIME_INFO(__i915)->step.display_step)
#define INTEL_GRAPHICS_STEP(__i915) (RUNTIME_INFO(__i915)->step.graphics_step)
#define INTEL_MEDIA_STEP(__i915) (RUNTIME_INFO(__i915)->step.media_step)

#define IS_DISPLAY_STEP(__i915, since, until) \
	(drm_WARN_ON(&(__i915)->drm, INTEL_DISPLAY_STEP(__i915) == STEP_NONE), \
	 INTEL_DISPLAY_STEP(__i915) >= (since) && INTEL_DISPLAY_STEP(__i915) < (until))

#define IS_GRAPHICS_STEP(__i915, since, until) \
	(drm_WARN_ON(&(__i915)->drm, INTEL_GRAPHICS_STEP(__i915) == STEP_NONE), \
	 INTEL_GRAPHICS_STEP(__i915) >= (since) && INTEL_GRAPHICS_STEP(__i915) < (until))

#define IS_MEDIA_STEP(__i915, since, until) \
	(drm_WARN_ON(&(__i915)->drm, INTEL_MEDIA_STEP(__i915) == STEP_NONE), \
	 INTEL_MEDIA_STEP(__i915) >= (since) && INTEL_MEDIA_STEP(__i915) < (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_MASK;
}

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_SANDYBRIDGE(dev_priv) IS_PLATFORM(dev_priv, INTEL_SANDYBRIDGE)
#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_ICELAKE(dev_priv)	IS_PLATFORM(dev_priv, INTEL_ICELAKE)
#define IS_JSL_EHL(dev_priv)	(IS_PLATFORM(dev_priv, INTEL_JASPERLAKE) || \
				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_DG1(dev_priv)        IS_PLATFORM(dev_priv, INTEL_DG1)
#define IS_ALDERLAKE_S(dev_priv) IS_PLATFORM(dev_priv, INTEL_ALDERLAKE_S)
#define IS_ALDERLAKE_P(dev_priv) IS_PLATFORM(dev_priv, INTEL_ALDERLAKE_P)
#define IS_XEHPSDV(dev_priv) IS_PLATFORM(dev_priv, INTEL_XEHPSDV)
#define IS_DG2(dev_priv)	IS_PLATFORM(dev_priv, INTEL_DG2)
#define IS_DG2_G10(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_DG2, INTEL_SUBPLATFORM_G10)
#define IS_DG2_G11(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_DG2, INTEL_SUBPLATFORM_G11)
#define IS_ADLS_RPLS(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_ALDERLAKE_S, INTEL_SUBPLATFORM_RPL_S)
#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_ICL_WITH_PORT_F(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_ICELAKE, INTEL_SUBPLATFORM_PORTF)

#define IS_TGL_U(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_TIGERLAKE, INTEL_SUBPLATFORM_ULT)

#define IS_TGL_Y(dev_priv) \
	IS_SUBPLATFORM(dev_priv, INTEL_TIGERLAKE, INTEL_SUBPLATFORM_ULX)

#define IS_SKL_GRAPHICS_STEP(p, since, until) (IS_SKYLAKE(p) && IS_GRAPHICS_STEP(p, since, until))

#define IS_KBL_GRAPHICS_STEP(dev_priv, since, until) \
	(IS_KABYLAKE(dev_priv) && IS_GRAPHICS_STEP(dev_priv, since, until))
#define IS_KBL_DISPLAY_STEP(dev_priv, since, until) \
	(IS_KABYLAKE(dev_priv) && IS_DISPLAY_STEP(dev_priv, since, until))

#define IS_JSL_EHL_GRAPHICS_STEP(p, since, until) \
	(IS_JSL_EHL(p) && IS_GRAPHICS_STEP(p, since, until))
#define IS_JSL_EHL_DISPLAY_STEP(p, since, until) \
	(IS_JSL_EHL(p) && IS_DISPLAY_STEP(p, since, until))

#define IS_TGL_DISPLAY_STEP(__i915, since, until) \
	(IS_TIGERLAKE(__i915) && \
	 IS_DISPLAY_STEP(__i915, since, until))

#define IS_TGL_UY_GRAPHICS_STEP(__i915, since, until) \
	((IS_TGL_U(__i915) || IS_TGL_Y(__i915)) && \
	 IS_GRAPHICS_STEP(__i915, since, until))

#define IS_TGL_GRAPHICS_STEP(__i915, since, until) \
	(IS_TIGERLAKE(__i915) && !(IS_TGL_U(__i915) || IS_TGL_Y(__i915)) && \
	 IS_GRAPHICS_STEP(__i915, since, until))

#define IS_RKL_DISPLAY_STEP(p, since, until) \
	(IS_ROCKETLAKE(p) && IS_DISPLAY_STEP(p, since, until))

#define IS_DG1_GRAPHICS_STEP(p, since, until) \
	(IS_DG1(p) && IS_GRAPHICS_STEP(p, since, until))
#define IS_DG1_DISPLAY_STEP(p, since, until) \
	(IS_DG1(p) && IS_DISPLAY_STEP(p, since, until))

#define IS_ADLS_DISPLAY_STEP(__i915, since, until) \
	(IS_ALDERLAKE_S(__i915) && \
	 IS_DISPLAY_STEP(__i915, since, until))

#define IS_ADLS_GRAPHICS_STEP(__i915, since, until) \
	(IS_ALDERLAKE_S(__i915) && \
	 IS_GRAPHICS_STEP(__i915, since, until))

#define IS_ADLP_DISPLAY_STEP(__i915, since, until) \
	(IS_ALDERLAKE_P(__i915) && \
	 IS_DISPLAY_STEP(__i915, since, until))

#define IS_ADLP_GRAPHICS_STEP(__i915, since, until) \
	(IS_ALDERLAKE_P(__i915) && \
	 IS_GRAPHICS_STEP(__i915, since, until))

#define IS_XEHPSDV_GRAPHICS_STEP(__i915, since, until) \
	(IS_XEHPSDV(__i915) && IS_GRAPHICS_STEP(__i915, since, until))

/*
 * DG2 hardware steppings are a bit unusual.  The hardware design was forked
 * to create two variants (G10 and G11) which have distinct workaround sets.
 * The G11 fork of the DG2 design resets the GT stepping back to "A0" for its
 * first iteration, even though it's more similar to a G10 B0 stepping in terms
 * of functionality and workarounds.  However the display stepping does not
 * reset in the same manner --- a specific stepping like "B0" has a consistent
 * meaning regardless of whether it belongs to a G10 or G11 DG2.
 *
 * TLDR:  All GT workarounds and stepping-specific logic must be applied in
 * relation to a specific subplatform (G10 or G11), whereas display workarounds
 * and stepping-specific logic will be applied with a general DG2-wide stepping
 * number.
 */
#define IS_DG2_GRAPHICS_STEP(__i915, variant, since, until) \
	(IS_SUBPLATFORM(__i915, INTEL_DG2, INTEL_SUBPLATFORM_##variant) && \
	 IS_GRAPHICS_STEP(__i915, since, until))

#define IS_DG2_DISPLAY_STEP(__i915, since, until) \
	(IS_DG2(__i915) && \
	 IS_DISPLAY_STEP(__i915, since, until))

#define IS_LP(dev_priv)		(INTEL_INFO(dev_priv)->is_lp)
#define IS_GEN9_LP(dev_priv)	(GRAPHICS_VER(dev_priv) == 9 && IS_LP(dev_priv))
#define IS_GEN9_BC(dev_priv)	(GRAPHICS_VER(dev_priv) == 9 && !IS_LP(dev_priv))

#define __HAS_ENGINE(engine_mask, id) ((engine_mask) & BIT(id))
#define HAS_ENGINE(gt, id) __HAS_ENGINE((gt)->info.engine_mask, id)

#define ENGINE_INSTANCES_MASK(gt, first, count) ({		\
	unsigned int first__ = (first);					\
	unsigned int count__ = (count);					\
	((gt)->info.engine_mask &						\
	 GENMASK(first__ + count__ - 1, first__)) >> first__;		\
})
#define VDBOX_MASK(gt) \
	ENGINE_INSTANCES_MASK(gt, VCS0, I915_MAX_VCS)
#define VEBOX_MASK(gt) \
	ENGINE_INSTANCES_MASK(gt, 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) (GRAPHICS_VER(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) (GRAPHICS_VER(dev_priv) < 6)
#define HAS_WT(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_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) || GRAPHICS_VER(dev_priv) == 9)

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

#define HAS_GMBUS_IRQ(dev_priv) (GRAPHICS_VER(dev_priv) >= 4)
#define HAS_GMBUS_BURST_READ(dev_priv) (GRAPHICS_VER(dev_priv) >= 11 || \
					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) (GRAPHICS_VER(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)	(GRAPHICS_VER(dev_priv) > 2)
#define HAS_FBC(dev_priv)	(INTEL_INFO(dev_priv)->display.fbc_mask != 0)
#define HAS_CUR_FBC(dev_priv)	(!HAS_GMCH(dev_priv) && GRAPHICS_VER(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_DP20(dev_priv)	(IS_DG2(dev_priv))

#define HAS_CDCLK_CRAWL(dev_priv)	 (INTEL_INFO(dev_priv)->display.has_cdclk_crawl)
#define HAS_DDI(dev_priv)		 (INTEL_INFO(dev_priv)->display.has_ddi)
#define HAS_FPGA_DBG_UNCLAIMED(dev_priv) (INTEL_INFO(dev_priv)->display.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_PSR2_SEL_FETCH(dev_priv)	 (GRAPHICS_VER(dev_priv) >= 12)
#define HAS_TRANSCODER(dev_priv, trans)	 ((INTEL_INFO(dev_priv)->display.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_DMC(dev_priv)	(INTEL_INFO(dev_priv)->display.has_dmc)

#define HAS_MSO(i915)		(GRAPHICS_VER(i915) >= 12)

#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_MSLICES(dev_priv) \
	(INTEL_INFO(dev_priv)->has_mslices)

/*
 * Set this flag, when platform requires 64K GTT page sizes or larger for
 * device local memory access. Also this flag implies that we require or
 * at least support the compact PT layout for the ppGTT when using the 64K
 * GTT pages.
 */
#define HAS_64K_PAGES(dev_priv) (INTEL_INFO(dev_priv)->has_64k_pages)

#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_PXP(dev_priv)  ((IS_ENABLED(CONFIG_DRM_I915_PXP) && \
			    INTEL_INFO(dev_priv)->has_pxp) && \
			    VDBOX_MASK(&dev_priv->gt))

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

#define HAS_LSPCON(dev_priv) (IS_GRAPHICS_VER(dev_priv, 9, 10))

/* 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)->display.pipe_mask))

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

#define HAS_VRR(i915)	(GRAPHICS_VER(i915) >= 11)

#define HAS_ASYNC_FLIPS(i915)		(DISPLAY_VER(i915) >= 5)

/* 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 run_as_guest(void)
{
	return !hypervisor_is_type(X86_HYPER_NATIVE);
}

#define HAS_D12_PLANE_MINIMIZATION(dev_priv) (IS_ROCKETLAKE(dev_priv) || \
					      IS_ALDERLAKE_S(dev_priv))

static inline bool intel_vtd_active(struct drm_i915_private *i915)
{
	if (device_iommu_mapped(i915->drm.dev))
		return true;

	/* Running as a guest, we assume the host is enforcing VT'd */
	return run_as_guest();
}

void
i915_print_iommu_status(struct drm_i915_private *i915, struct drm_printer *p);

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

static inline bool
intel_ggtt_update_needs_vtd_wa(struct drm_i915_private *i915)
{
	return IS_BROXTON(i915) && intel_vtd_active(i915);
}

static inline bool
intel_vm_no_concurrent_access_wa(struct drm_i915_private *i915)
{
	return IS_CHERRYVIEW(i915) || intel_ggtt_update_needs_vtd_wa(i915);
}

/* i915_getparam.c */
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);

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);
		flush_delayed_work(&i915->bdev.wq);
		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_ww(struct drm_i915_gem_object *obj,
			    struct i915_gem_ww_ctx *ww,
			    const struct i915_ggtt_view *view,
			    u64 size, u64 alignment, u64 flags);

static inline 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)
{
	return i915_gem_object_ggtt_pin_ww(obj, NULL, view, size, alignment, 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)
#define I915_GEM_OBJECT_UNBIND_VM_TRYLOCK BIT(3)
#define I915_GEM_OBJECT_UNBIND_ASYNC BIT(4)

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);

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_address_space *
i915_gem_vm_lookup(struct drm_i915_file_private *file_priv, u32 id)
{
	struct i915_address_space *vm;

	xa_lock(&file_priv->vm_xa);
	vm = xa_load(&file_priv->vm_xa, id);
	if (vm)
		kref_get(&vm->ref);
	xa_unlock(&file_priv->vm_xa);

	return vm;
}

/* 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);
struct drm_i915_gem_object *
__i915_gem_object_create_internal(struct drm_i915_private *dev_priv,
				  const struct drm_i915_gem_object_ops *ops,
				  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);
int 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,
			    unsigned long batch_offset,
			    unsigned long 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);

static inline int intel_hws_csb_write_index(struct drm_i915_private *i915)
{
	if (GRAPHICS_VER(i915) >= 11)
		return ICL_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,
		       struct drm_i915_gem_object *obj, bool always_coherent)
{
	if (i915_gem_object_is_lmem(obj))
		return I915_MAP_WC;
	if (HAS_LLC(i915) || always_coherent)
		return I915_MAP_WB;
	else
		return I915_MAP_WC;
}

#endif