xref: /freebsd-11-stable/sys/dev/drm2/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.
 *
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/dev/drm2/i915/i915_drv.h 240539 2012-09-15 19:28:54Z ed $");

#ifndef _I915_DRV_H_
#define _I915_DRV_H_

#include <dev/agp/agp_i810.h>
#include <dev/drm2/drm_mm.h>
#include <dev/drm2/i915/i915_reg.h>
#include <dev/drm2/i915/intel_ringbuffer.h>
#include <dev/drm2/i915/intel_bios.h>

/* General customization:
 */

#define DRIVER_AUTHOR		"Tungsten Graphics, Inc."

#define DRIVER_NAME		"i915"
#define DRIVER_DESC		"Intel Graphics"
#define DRIVER_DATE		"20080730"

MALLOC_DECLARE(DRM_I915_GEM);

enum pipe {
	PIPE_A = 0,
	PIPE_B,
	PIPE_C,
	I915_MAX_PIPES
};
#define pipe_name(p) ((p) + 'A')
#define I915_NUM_PIPE	2

enum plane {
	PLANE_A = 0,
	PLANE_B,
	PLANE_C,
};
#define plane_name(p) ((p) + 'A')

#define	I915_GEM_GPU_DOMAINS	(~(I915_GEM_DOMAIN_CPU | I915_GEM_DOMAIN_GTT))

#define for_each_pipe(p) for ((p) = 0; (p) < dev_priv->num_pipe; (p)++)

/* 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

#define WATCH_COHERENCY	0
#define WATCH_BUF	0
#define WATCH_EXEC	0
#define WATCH_LRU	0
#define WATCH_RELOC	0
#define WATCH_INACTIVE	0
#define WATCH_PWRITE	0

#define I915_GEM_PHYS_CURSOR_0 1
#define I915_GEM_PHYS_CURSOR_1 2
#define I915_GEM_PHYS_OVERLAY_REGS 3
#define I915_MAX_PHYS_OBJECT (I915_GEM_PHYS_OVERLAY_REGS)

struct drm_i915_gem_phys_object {
	int id;
	drm_dma_handle_t *handle;
	struct drm_i915_gem_object *cur_obj;
};

struct drm_i915_private;

struct drm_i915_display_funcs {
	void (*dpms)(struct drm_crtc *crtc, int mode);
	bool (*fbc_enabled)(struct drm_device *dev);
	void (*enable_fbc)(struct drm_crtc *crtc, unsigned long interval);
	void (*disable_fbc)(struct drm_device *dev);
	int (*get_display_clock_speed)(struct drm_device *dev);
	int (*get_fifo_size)(struct drm_device *dev, int plane);
	void (*update_wm)(struct drm_device *dev);
	void (*update_sprite_wm)(struct drm_device *dev, int pipe,
				 uint32_t sprite_width, int pixel_size);
	int (*crtc_mode_set)(struct drm_crtc *crtc,
			     struct drm_display_mode *mode,
			     struct drm_display_mode *adjusted_mode,
			     int x, int y,
			     struct drm_framebuffer *old_fb);
	void (*write_eld)(struct drm_connector *connector,
			  struct drm_crtc *crtc);
	void (*fdi_link_train)(struct drm_crtc *crtc);
	void (*init_clock_gating)(struct drm_device *dev);
	void (*init_pch_clock_gating)(struct drm_device *dev);
	int (*queue_flip)(struct drm_device *dev, struct drm_crtc *crtc,
			  struct drm_framebuffer *fb,
			  struct drm_i915_gem_object *obj);
	void (*force_wake_get)(struct drm_i915_private *dev_priv);
	void (*force_wake_put)(struct drm_i915_private *dev_priv);
	int (*update_plane)(struct drm_crtc *crtc, struct drm_framebuffer *fb,
			    int x, int y);
	/* clock updates for mode set */
	/* cursor updates */
	/* render clock increase/decrease */
	/* display clock increase/decrease */
	/* pll clock increase/decrease */
};

struct intel_device_info {
	u8 gen;
	u8 is_mobile:1;
	u8 is_i85x:1;
	u8 is_i915g:1;
	u8 is_i945gm:1;
	u8 is_g33:1;
	u8 need_gfx_hws:1;
	u8 is_g4x:1;
	u8 is_pineview:1;
	u8 is_broadwater:1;
	u8 is_crestline:1;
	u8 is_ivybridge:1;
	u8 has_fbc:1;
	u8 has_pipe_cxsr:1;
	u8 has_hotplug:1;
	u8 cursor_needs_physical:1;
	u8 has_overlay:1;
	u8 overlay_needs_physical:1;
	u8 supports_tv:1;
	u8 has_bsd_ring:1;
	u8 has_blt_ring:1;
	u8 has_llc:1;
};

#define I915_PPGTT_PD_ENTRIES 512
#define I915_PPGTT_PT_ENTRIES 1024
struct i915_hw_ppgtt {
	unsigned num_pd_entries;
	vm_page_t *pt_pages;
	uint32_t pd_offset;
	vm_paddr_t *pt_dma_addr;
	vm_paddr_t scratch_page_dma_addr;
};

enum no_fbc_reason {
	FBC_NO_OUTPUT, /* no outputs enabled to compress */
	FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */
	FBC_UNSUPPORTED_MODE, /* interlace or doublescanned mode */
	FBC_MODE_TOO_LARGE, /* mode too large for compression */
	FBC_BAD_PLANE, /* fbc not supported on plane */
	FBC_NOT_TILED, /* buffer not tiled */
	FBC_MULTIPLE_PIPES, /* more than one pipe active */
	FBC_MODULE_PARAM,
};

struct mem_block {
	struct mem_block *next;
	struct mem_block *prev;
	int start;
	int size;
	struct drm_file *file_priv; /* NULL: free, -1: heap, other: real files */
};

struct opregion_header;
struct opregion_acpi;
struct opregion_swsci;
struct opregion_asle;

struct intel_opregion {
	struct opregion_header *header;
	struct opregion_acpi *acpi;
	struct opregion_swsci *swsci;
	struct opregion_asle *asle;
	void *vbt;
	u32 *lid_state;
};
#define OPREGION_SIZE            (8*1024)

#define I915_FENCE_REG_NONE -1
#define I915_MAX_NUM_FENCES 16
/* 16 fences + sign bit for FENCE_REG_NONE */
#define I915_MAX_NUM_FENCE_BITS 5

struct drm_i915_fence_reg {
	struct list_head lru_list;
	struct drm_i915_gem_object *obj;
	uint32_t setup_seqno;
	int pin_count;
};

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

enum intel_pch {
	PCH_IBX,	/* Ibexpeak PCH */
	PCH_CPT,	/* Cougarpoint PCH */
};

#define QUIRK_PIPEA_FORCE (1<<0)
#define QUIRK_LVDS_SSC_DISABLE (1<<1)

struct intel_fbdev;
struct intel_fbc_work;

typedef struct drm_i915_private {
	struct drm_device *dev;

	device_t *gmbus_bridge;
	device_t *bbbus_bridge;
	device_t *gmbus;
	device_t *bbbus;
	/** gmbus_sx protects against concurrent usage of the single hw gmbus
	 * controller on different i2c buses. */
	struct sx gmbus_sx;

	int has_gem;
	int relative_constants_mode;

	drm_local_map_t *sarea;
	drm_local_map_t *mmio_map;

	/** gt_fifo_count and the subsequent register write are synchronized
	 * with dev->struct_mutex. */
	unsigned gt_fifo_count;
	/** forcewake_count is protected by gt_lock */
	unsigned forcewake_count;
	/** gt_lock is also taken in irq contexts. */
	struct mtx gt_lock;

	drm_i915_sarea_t *sarea_priv;
	/* drm_i915_ring_buffer_t ring; */
	struct intel_ring_buffer rings[I915_NUM_RINGS];
	uint32_t next_seqno;

	drm_dma_handle_t *status_page_dmah;
	void *hw_status_page;
	dma_addr_t dma_status_page;
	uint32_t counter;
	unsigned int status_gfx_addr;
	drm_local_map_t hws_map;
	struct drm_gem_object *hws_obj;

	struct drm_i915_gem_object *pwrctx;
	struct drm_i915_gem_object *renderctx;

	unsigned int cpp;
	int back_offset;
	int front_offset;
	int current_page;
	int page_flipping;

	atomic_t irq_received;
	u32 trace_irq_seqno;

	/** Cached value of IER to avoid reads in updating the bitfield */
	u32 pipestat[2];
	u32 irq_mask;
	u32 gt_irq_mask;
	u32 pch_irq_mask;
	struct mtx irq_lock;

	u32 hotplug_supported_mask;

	int tex_lru_log_granularity;
	int allow_batchbuffer;
	unsigned int sr01, adpa, ppcr, dvob, dvoc, lvds;
	int vblank_pipe;
	int num_pipe;

	/* For hangcheck timer */
#define DRM_I915_HANGCHECK_PERIOD ((1500 /* in ms */ * hz) / 1000)
	int hangcheck_count;
	uint32_t last_acthd;
	uint32_t last_acthd_bsd;
	uint32_t last_acthd_blt;
	uint32_t last_instdone;
	uint32_t last_instdone1;

	struct intel_opregion opregion;


	/* overlay */
	struct intel_overlay *overlay;
	bool sprite_scaling_enabled;

	/* LVDS info */
	int backlight_level;  /* restore backlight to this value */
	bool backlight_enabled;
	struct drm_display_mode *lfp_lvds_vbt_mode; /* if any */
	struct drm_display_mode *sdvo_lvds_vbt_mode; /* if any */

	/* Feature bits from the VBIOS */
	unsigned int int_tv_support:1;
	unsigned int lvds_dither:1;
	unsigned int lvds_vbt:1;
	unsigned int int_crt_support:1;
	unsigned int lvds_use_ssc:1;
	unsigned int display_clock_mode:1;
	int lvds_ssc_freq;
	struct {
		int rate;
		int lanes;
		int preemphasis;
		int vswing;

		bool initialized;
		bool support;
		int bpp;
		struct edp_power_seq pps;
	} edp;
	bool no_aux_handshake;

	int crt_ddc_pin;
	struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
	int fence_reg_start; /* 4 if userland hasn't ioctl'd us yet */
	int num_fence_regs; /* 8 on pre-965, 16 otherwise */

	/* PCH chipset type */
	enum intel_pch pch_type;

	/* Display functions */
	struct drm_i915_display_funcs display;

	unsigned long quirks;

	/* Register state */
	bool modeset_on_lid;
	u8 saveLBB;
	u32 saveDSPACNTR;
	u32 saveDSPBCNTR;
	u32 saveDSPARB;
	u32 saveHWS;
	u32 savePIPEACONF;
	u32 savePIPEBCONF;
	u32 savePIPEASRC;
	u32 savePIPEBSRC;
	u32 saveFPA0;
	u32 saveFPA1;
	u32 saveDPLL_A;
	u32 saveDPLL_A_MD;
	u32 saveHTOTAL_A;
	u32 saveHBLANK_A;
	u32 saveHSYNC_A;
	u32 saveVTOTAL_A;
	u32 saveVBLANK_A;
	u32 saveVSYNC_A;
	u32 saveBCLRPAT_A;
	u32 saveTRANSACONF;
	u32 saveTRANS_HTOTAL_A;
	u32 saveTRANS_HBLANK_A;
	u32 saveTRANS_HSYNC_A;
	u32 saveTRANS_VTOTAL_A;
	u32 saveTRANS_VBLANK_A;
	u32 saveTRANS_VSYNC_A;
	u32 savePIPEASTAT;
	u32 saveDSPASTRIDE;
	u32 saveDSPASIZE;
	u32 saveDSPAPOS;
	u32 saveDSPAADDR;
	u32 saveDSPASURF;
	u32 saveDSPATILEOFF;
	u32 savePFIT_PGM_RATIOS;
	u32 saveBLC_HIST_CTL;
	u32 saveBLC_PWM_CTL;
	u32 saveBLC_PWM_CTL2;
	u32 saveBLC_CPU_PWM_CTL;
	u32 saveBLC_CPU_PWM_CTL2;
	u32 saveFPB0;
	u32 saveFPB1;
	u32 saveDPLL_B;
	u32 saveDPLL_B_MD;
	u32 saveHTOTAL_B;
	u32 saveHBLANK_B;
	u32 saveHSYNC_B;
	u32 saveVTOTAL_B;
	u32 saveVBLANK_B;
	u32 saveVSYNC_B;
	u32 saveBCLRPAT_B;
	u32 saveTRANSBCONF;
	u32 saveTRANS_HTOTAL_B;
	u32 saveTRANS_HBLANK_B;
	u32 saveTRANS_HSYNC_B;
	u32 saveTRANS_VTOTAL_B;
	u32 saveTRANS_VBLANK_B;
	u32 saveTRANS_VSYNC_B;
	u32 savePIPEBSTAT;
	u32 saveDSPBSTRIDE;
	u32 saveDSPBSIZE;
	u32 saveDSPBPOS;
	u32 saveDSPBADDR;
	u32 saveDSPBSURF;
	u32 saveDSPBTILEOFF;
	u32 saveVGA0;
	u32 saveVGA1;
	u32 saveVGA_PD;
	u32 saveVGACNTRL;
	u32 saveADPA;
	u32 saveLVDS;
	u32 savePP_ON_DELAYS;
	u32 savePP_OFF_DELAYS;
	u32 saveDVOA;
	u32 saveDVOB;
	u32 saveDVOC;
	u32 savePP_ON;
	u32 savePP_OFF;
	u32 savePP_CONTROL;
	u32 savePP_DIVISOR;
	u32 savePFIT_CONTROL;
	u32 save_palette_a[256];
	u32 save_palette_b[256];
	u32 saveDPFC_CB_BASE;
	u32 saveFBC_CFB_BASE;
	u32 saveFBC_LL_BASE;
	u32 saveFBC_CONTROL;
	u32 saveFBC_CONTROL2;
	u32 saveIER;
	u32 saveIIR;
	u32 saveIMR;
	u32 saveDEIER;
	u32 saveDEIMR;
	u32 saveGTIER;
	u32 saveGTIMR;
	u32 saveFDI_RXA_IMR;
	u32 saveFDI_RXB_IMR;
	u32 saveCACHE_MODE_0;
	u32 saveMI_ARB_STATE;
	u32 saveSWF0[16];
	u32 saveSWF1[16];
	u32 saveSWF2[3];
	u8 saveMSR;
	u8 saveSR[8];
	u8 saveGR[25];
	u8 saveAR_INDEX;
	u8 saveAR[21];
	u8 saveDACMASK;
	u8 saveCR[37];
	uint64_t saveFENCE[I915_MAX_NUM_FENCES];
	u32 saveCURACNTR;
	u32 saveCURAPOS;
	u32 saveCURABASE;
	u32 saveCURBCNTR;
	u32 saveCURBPOS;
	u32 saveCURBBASE;
	u32 saveCURSIZE;
	u32 saveDP_B;
	u32 saveDP_C;
	u32 saveDP_D;
	u32 savePIPEA_GMCH_DATA_M;
	u32 savePIPEB_GMCH_DATA_M;
	u32 savePIPEA_GMCH_DATA_N;
	u32 savePIPEB_GMCH_DATA_N;
	u32 savePIPEA_DP_LINK_M;
	u32 savePIPEB_DP_LINK_M;
	u32 savePIPEA_DP_LINK_N;
	u32 savePIPEB_DP_LINK_N;
	u32 saveFDI_RXA_CTL;
	u32 saveFDI_TXA_CTL;
	u32 saveFDI_RXB_CTL;
	u32 saveFDI_TXB_CTL;
	u32 savePFA_CTL_1;
	u32 savePFB_CTL_1;
	u32 savePFA_WIN_SZ;
	u32 savePFB_WIN_SZ;
	u32 savePFA_WIN_POS;
	u32 savePFB_WIN_POS;
	u32 savePCH_DREF_CONTROL;
	u32 saveDISP_ARB_CTL;
	u32 savePIPEA_DATA_M1;
	u32 savePIPEA_DATA_N1;
	u32 savePIPEA_LINK_M1;
	u32 savePIPEA_LINK_N1;
	u32 savePIPEB_DATA_M1;
	u32 savePIPEB_DATA_N1;
	u32 savePIPEB_LINK_M1;
	u32 savePIPEB_LINK_N1;
	u32 saveMCHBAR_RENDER_STANDBY;
	u32 savePCH_PORT_HOTPLUG;

	struct {
		/** Memory allocator for GTT stolen memory */
		struct drm_mm stolen;
		/** Memory allocator for GTT */
		struct drm_mm gtt_space;
		/** List of all objects in gtt_space. Used to restore gtt
		 * mappings on resume */
		struct list_head gtt_list;

		/** Usable portion of the GTT for GEM */
		unsigned long gtt_start;
		unsigned long gtt_mappable_end;
		unsigned long gtt_end;

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

		/**
		 * List of objects currently involved in rendering from the
		 * ringbuffer.
		 *
		 * Includes buffers having the contents of their GPU caches
		 * flushed, not necessarily primitives.  last_rendering_seqno
		 * represents when the rendering involved will be completed.
		 *
		 * A reference is held on the buffer while on this list.
		 */
		struct list_head active_list;

		/**
		 * List of objects which are not in the ringbuffer but which
		 * still have a write_domain which needs to be flushed before
		 * unbinding.
		 *
		 * A reference is held on the buffer while on this list.
		 */
		struct list_head flushing_list;

		/**
		 * LRU list of objects which are not in the ringbuffer and
		 * are ready to unbind, but are still in the GTT.
		 *
		 * last_rendering_seqno is 0 while an object is in this list.
		 *
		 * A reference is not held on the buffer while on this list,
		 * as merely being GTT-bound shouldn't prevent its being
		 * freed, and we'll pull it off the list in the free path.
		 */
		struct list_head inactive_list;

		/**
		 * LRU list of objects which are not in the ringbuffer but
		 * are still pinned in the GTT.
		 */
		struct list_head pinned_list;

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

		/**
		 * List of objects currently pending being freed.
		 *
		 * These objects are no longer in use, but due to a signal
		 * we were prevented from freeing them at the appointed time.
		 */
		struct list_head deferred_free_list;

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

 		/**
		 * Are we in a non-interruptible section of code like
		 * modesetting?
		 */
		bool interruptible;

		uint32_t next_gem_seqno;

		/**
		 * Waiting sequence number, if any
		 */
		uint32_t waiting_gem_seqno;

		/**
		 * Last seq seen at irq time
		 */
		uint32_t irq_gem_seqno;

		/**
		 * Flag if the X Server, and thus DRM, is not currently in
		 * control of the device.
		 *
		 * This is set between LeaveVT and EnterVT.  It needs to be
		 * replaced with a semaphore.  It also needs to be
		 * transitioned away from for kernel modesetting.
		 */
		int suspended;

		/**
		 * Flag if the hardware appears to be wedged.
		 *
		 * This is set when attempts to idle the device timeout.
		 * It prevents command submission from occuring and makes
		 * every pending request fail
		 */
		int wedged;

		/** Bit 6 swizzling required for X tiling */
		uint32_t bit_6_swizzle_x;
		/** Bit 6 swizzling required for Y tiling */
		uint32_t bit_6_swizzle_y;

		/* storage for physical objects */
		struct drm_i915_gem_phys_object *phys_objs[I915_MAX_PHYS_OBJECT];

		/* accounting, useful for userland debugging */
		size_t gtt_total;
		size_t mappable_gtt_total;
		size_t object_memory;
		u32 object_count;

		struct intel_gtt gtt;
		eventhandler_tag i915_lowmem;
	} mm;

	const struct intel_device_info *info;

	struct sdvo_device_mapping sdvo_mappings[2];
	/* indicate whether the LVDS_BORDER should be enabled or not */
	unsigned int lvds_border_bits;
	/* Panel fitter placement and size for Ironlake+ */
	u32 pch_pf_pos, pch_pf_size;

	struct drm_crtc *plane_to_crtc_mapping[3];
	struct drm_crtc *pipe_to_crtc_mapping[3];
	/* wait_queue_head_t pending_flip_queue; XXXKIB */
	bool flip_pending_is_done;

	/* Reclocking support */
	bool render_reclock_avail;
	bool lvds_downclock_avail;
	/* indicates the reduced downclock for LVDS*/
	int lvds_downclock;
	struct task idle_task;
	struct callout idle_callout;
	bool busy;
	u16 orig_clock;
	int child_dev_num;
	struct child_device_config *child_dev;
	struct drm_connector *int_lvds_connector;
	struct drm_connector *int_edp_connector;

	device_t bridge_dev;
	bool mchbar_need_disable;
	int mch_res_rid;
	struct resource *mch_res;

	struct mtx rps_lock;
	u32 pm_iir;
	struct task rps_task;

	u8 cur_delay;
	u8 min_delay;
	u8 max_delay;
	u8 fmax;
	u8 fstart;

	u64 last_count1;
	unsigned long last_time1;
	unsigned long chipset_power;
	u64 last_count2;
	struct timespec last_time2;
	unsigned long gfx_power;
	int c_m;
	int r_t;
	u8 corr;
	struct mtx *mchdev_lock;

	enum no_fbc_reason no_fbc_reason;

	unsigned long cfb_size;
	unsigned int cfb_fb;
	int cfb_plane;
	int cfb_y;
	struct intel_fbc_work *fbc_work;

	unsigned int fsb_freq, mem_freq, is_ddr3;

	struct taskqueue *tq;
	struct task error_task;
	struct task hotplug_task;
	int error_completion;
	struct mtx error_completion_lock;
	struct drm_i915_error_state *first_error;
	struct mtx error_lock;
	struct callout hangcheck_timer;

	unsigned long last_gpu_reset;

	struct intel_fbdev *fbdev;

	struct drm_property *broadcast_rgb_property;
	struct drm_property *force_audio_property;
} drm_i915_private_t;

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

enum i915_cache_level {
	I915_CACHE_NONE,
	I915_CACHE_LLC,
	I915_CACHE_LLC_MLC, /* gen6+ */
};

enum intel_chip_family {
	CHIP_I8XX = 0x01,
	CHIP_I9XX = 0x02,
	CHIP_I915 = 0x04,
	CHIP_I965 = 0x08,
};

/** driver private structure attached to each drm_gem_object */
struct drm_i915_gem_object {
	struct drm_gem_object base;

	/** Current space allocated to this object in the GTT, if any. */
	struct drm_mm_node *gtt_space;
	struct list_head gtt_list;
	/** This object's place on the active/flushing/inactive lists */
	struct list_head ring_list;
	struct list_head mm_list;
	/** This object's place on GPU write list */
	struct list_head gpu_write_list;
	/** This object's place in the batchbuffer or on the eviction list */
	struct list_head exec_list;

	/**
	 * This is set if the object is on the active or flushing lists
	 * (has pending rendering), and is not set if it's on inactive (ready
	 * to be unbound).
	 */
	unsigned int active:1;

	/**
	 * This is set if the object has been written to since last bound
	 * to the GTT
	 */
	unsigned int dirty:1;

	/**
	 * This is set if the object has been written to since the last
	 * GPU flush.
	 */
	unsigned int pending_gpu_write:1;

	/**
	 * Fence register bits (if any) for this object.  Will be set
	 * as needed when mapped into the GTT.
	 * Protected by dev->struct_mutex.
	 */
	signed int fence_reg:I915_MAX_NUM_FENCE_BITS;

	/**
	 * Advice: are the backing pages purgeable?
	 */
	unsigned int madv:2;

	/**
	 * Current tiling mode for the object.
	 */
	unsigned int tiling_mode:2;
	unsigned int tiling_changed:1;

	/** How many users have pinned this object in GTT space. The following
	 * users can each hold at most one reference: pwrite/pread, pin_ioctl
	 * (via user_pin_count), execbuffer (objects are not allowed multiple
	 * times for the same batchbuffer), and the framebuffer code. When
	 * switching/pageflipping, the framebuffer code has at most two buffers
	 * pinned per crtc.
	 *
	 * In the worst case this is 1 + 1 + 1 + 2*2 = 7. That would fit into 3
	 * bits with absolutely no headroom. So use 4 bits. */
	unsigned int pin_count:4;
#define DRM_I915_GEM_OBJECT_MAX_PIN_COUNT 0xf

	/**
	 * Is the object at the current location in the gtt mappable and
	 * fenceable? Used to avoid costly recalculations.
	 */
	unsigned int map_and_fenceable:1;

	/**
	 * Whether the current gtt mapping needs to be mappable (and isn't just
	 * mappable by accident). Track pin and fault separate for a more
	 * accurate mappable working set.
	 */
	unsigned int fault_mappable:1;
	unsigned int pin_mappable:1;

	/*
	 * Is the GPU currently using a fence to access this buffer,
	 */
	unsigned int pending_fenced_gpu_access:1;
	unsigned int fenced_gpu_access:1;

	unsigned int cache_level:2;

	unsigned int has_aliasing_ppgtt_mapping:1;

	vm_page_t *pages;

	/**
	 * DMAR support
	 */
	struct sglist *sg_list;

	/**
	 * Used for performing relocations during execbuffer insertion.
	 */
	LIST_ENTRY(drm_i915_gem_object) exec_node;
	unsigned long exec_handle;
	struct drm_i915_gem_exec_object2 *exec_entry;

	/**
	 * Current offset of the object in GTT space.
	 *
	 * This is the same as gtt_space->start
	 */
	uint32_t gtt_offset;

	/** Breadcrumb of last rendering to the buffer. */
	uint32_t last_rendering_seqno;
	struct intel_ring_buffer *ring;

	/** Breadcrumb of last fenced GPU access to the buffer. */
	uint32_t last_fenced_seqno;
	struct intel_ring_buffer *last_fenced_ring;

	/** Current tiling stride for the object, if it's tiled. */
	uint32_t stride;

	/** Record of address bit 17 of each page at last unbind. */
	unsigned long *bit_17;

	/**
	 * If present, while GEM_DOMAIN_CPU is in the read domain this array
	 * flags which individual pages are valid.
	 */
	uint8_t *page_cpu_valid;

	/** User space pin count and filp owning the pin */
	uint32_t user_pin_count;
	struct drm_file *pin_filp;

	/** for phy allocated objects */
	struct drm_i915_gem_phys_object *phys_obj;

	/**
	 * Number of crtcs where this object is currently the fb, but
	 * will be page flipped away on the next vblank.  When it
	 * reaches 0, dev_priv->pending_flip_queue will be woken up.
	 */
	int pending_flip;
};

#define	to_intel_bo(x) __containerof(x, struct drm_i915_gem_object, base)

/**
 * Request queue structure.
 *
 * The request queue allows us to note sequence numbers that have been emitted
 * and may be associated with active buffers to be retired.
 *
 * By keeping this list, we can avoid having to do questionable
 * sequence-number comparisons on buffer last_rendering_seqnos, and associate
 * an emission time with seqnos for tracking how far ahead of the GPU we are.
 */
struct drm_i915_gem_request {
	/** On Which ring this request was generated */
	struct intel_ring_buffer *ring;

	/** GEM sequence number associated with this request. */
	uint32_t seqno;

	/** Postion in the ringbuffer of the end of the request */
	u32 tail;

	/** Time at which this request was emitted, in jiffies. */
	unsigned long emitted_jiffies;

	/** global list entry for this request */
	struct list_head list;

	struct drm_i915_file_private *file_priv;
	/** file_priv list entry for this request */
	struct list_head client_list;
};

struct drm_i915_file_private {
	struct {
		struct list_head request_list;
		struct mtx lck;
	} mm;
};

struct drm_i915_error_state {
	u32 eir;
	u32 pgtbl_er;
	u32 pipestat[I915_MAX_PIPES];
	u32 tail[I915_NUM_RINGS];
	u32 head[I915_NUM_RINGS];
	u32 ipeir[I915_NUM_RINGS];
	u32 ipehr[I915_NUM_RINGS];
	u32 instdone[I915_NUM_RINGS];
	u32 acthd[I915_NUM_RINGS];
	u32 semaphore_mboxes[I915_NUM_RINGS][I915_NUM_RINGS - 1];
	/* our own tracking of ring head and tail */
	u32 cpu_ring_head[I915_NUM_RINGS];
	u32 cpu_ring_tail[I915_NUM_RINGS];
	u32 error; /* gen6+ */
	u32 instpm[I915_NUM_RINGS];
	u32 instps[I915_NUM_RINGS];
	u32 instdone1;
	u32 seqno[I915_NUM_RINGS];
	u64 bbaddr;
	u32 fault_reg[I915_NUM_RINGS];
	u32 done_reg;
	u32 faddr[I915_NUM_RINGS];
	u64 fence[I915_MAX_NUM_FENCES];
	struct timeval time;
	struct drm_i915_error_ring {
		struct drm_i915_error_object {
			int page_count;
			u32 gtt_offset;
			u32 *pages[0];
		} *ringbuffer, *batchbuffer;
		struct drm_i915_error_request {
			long jiffies;
			u32 seqno;
			u32 tail;
		} *requests;
		int num_requests;
	} ring[I915_NUM_RINGS];
	struct drm_i915_error_buffer {
		u32 size;
		u32 name;
		u32 seqno;
		u32 gtt_offset;
		u32 read_domains;
		u32 write_domain;
		s32 fence_reg:I915_MAX_NUM_FENCE_BITS;
		s32 pinned:2;
		u32 tiling:2;
		u32 dirty:1;
		u32 purgeable:1;
		s32 ring:4;
		u32 cache_level:2;
	} *active_bo, *pinned_bo;
	u32 active_bo_count, pinned_bo_count;
	struct intel_overlay_error_state *overlay;
	struct intel_display_error_state *display;
};

/**
 * RC6 is a special power stage which allows the GPU to enter an very
 * low-voltage mode when idle, using down to 0V while at this stage.  This
 * stage is entered automatically when the GPU is idle when RC6 support is
 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
 *
 * There are different RC6 modes available in Intel GPU, which differentiate
 * among each other with the latency required to enter and leave RC6 and
 * voltage consumed by the GPU in different states.
 *
 * The combination of the following flags define which states GPU is allowed
 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
 * RC6pp is deepest RC6. Their support by hardware varies according to the
 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
 * which brings the most power savings; deeper states save more power, but
 * require higher latency to switch to and wake up.
 */
#define INTEL_RC6_ENABLE			(1<<0)
#define INTEL_RC6p_ENABLE			(1<<1)
#define INTEL_RC6pp_ENABLE			(1<<2)

extern int intel_iommu_enabled;
extern struct drm_ioctl_desc i915_ioctls[];
extern struct drm_driver_info i915_driver_info;
extern struct cdev_pager_ops i915_gem_pager_ops;
extern unsigned int i915_fbpercrtc;
extern int i915_panel_ignore_lid;
extern unsigned int i915_powersave;
extern int i915_semaphores;
extern unsigned int i915_lvds_downclock;
extern int i915_panel_use_ssc;
extern int i915_vbt_sdvo_panel_type;
extern int i915_enable_rc6;
extern int i915_enable_fbc;
extern int i915_enable_ppgtt;
extern int i915_enable_hangcheck;

const struct intel_device_info *i915_get_device_id(int device);

int i915_reset(struct drm_device *dev, u8 flags);

/* i915_debug.c */
int i915_sysctl_init(struct drm_device *dev, struct sysctl_ctx_list *ctx,
    struct sysctl_oid *top);
void i915_sysctl_cleanup(struct drm_device *dev);

				/* i915_dma.c */
int i915_batchbuffer(struct drm_device *dev, void *data,
    struct drm_file *file_priv);
int i915_cmdbuffer(struct drm_device *dev, void *data,
    struct drm_file *file_priv);
int i915_getparam(struct drm_device *dev, void *data,
    struct drm_file *file_priv);
extern void i915_kernel_lost_context(struct drm_device * dev);
extern int i915_driver_load(struct drm_device *, unsigned long flags);
extern int i915_driver_unload(struct drm_device *);
extern int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv);
extern void i915_driver_lastclose(struct drm_device * dev);
extern void i915_driver_preclose(struct drm_device *dev,
				 struct drm_file *file_priv);
extern void i915_driver_postclose(struct drm_device *dev,
				  struct drm_file *file_priv);
extern int i915_driver_device_is_agp(struct drm_device * dev);
extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
			      unsigned long arg);
extern int i915_emit_box(struct drm_device *dev,
			 struct drm_clip_rect __user *boxes,
			 int i, int DR1, int DR4);
int i915_emit_box_p(struct drm_device *dev, struct drm_clip_rect *box,
    int DR1, int DR4);

unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
void i915_update_gfx_val(struct drm_i915_private *dev_priv);
unsigned long i915_gfx_val(struct drm_i915_private *dev_priv);
unsigned long i915_read_mch_val(void);
bool i915_gpu_raise(void);
bool i915_gpu_lower(void);
bool i915_gpu_busy(void);
bool i915_gpu_turbo_disable(void);

/* i915_irq.c */
extern int i915_irq_emit(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
extern int i915_irq_wait(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);

extern void intel_irq_init(struct drm_device *dev);

extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
extern int i915_vblank_swap(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
void intel_enable_asle(struct drm_device *dev);
void i915_hangcheck_elapsed(void *context);
void i915_handle_error(struct drm_device *dev, bool wedged);

void i915_enable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);
void i915_disable_pipestat(drm_i915_private_t *dev_priv, int pipe, u32 mask);

void i915_destroy_error_state(struct drm_device *dev);

/* i915_gem.c */
int i915_gem_create(struct drm_file *file, struct drm_device *dev, uint64_t size,
			uint32_t *handle_p);
int i915_gem_init_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_create_ioctl(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
int i915_gem_pread_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
			  struct drm_file *file_priv);
int i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
			      struct drm_file *file_priv);
int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
			     struct drm_file *file_priv);
int i915_gem_execbuffer(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_execbuffer2(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_pin_ioctl(struct drm_device *dev, void *data,
		       struct drm_file *file_priv);
int i915_gem_unpin_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv);
int i915_gem_busy_ioctl(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_throttle_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv);
int i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
int i915_gem_entervt_ioctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
int i915_gem_leavevt_ioctl(struct drm_device *dev, void *data,
			   struct drm_file *file_priv);
int i915_gem_set_tiling(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_get_tiling(struct drm_device *dev, void *data,
			struct drm_file *file_priv);
int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data,
				struct drm_file *file_priv);
void i915_gem_load(struct drm_device *dev);
void i915_gem_unload(struct drm_device *dev);
int i915_gem_init_object(struct drm_gem_object *obj);
void i915_gem_free_object(struct drm_gem_object *obj);
int i915_gem_object_pin(struct drm_i915_gem_object *obj, uint32_t alignment,
    bool map_and_fenceable);
void i915_gem_object_unpin(struct drm_i915_gem_object *obj);
int i915_gem_object_unbind(struct drm_i915_gem_object *obj);
void i915_gem_lastclose(struct drm_device *dev);
uint32_t i915_get_gem_seqno(struct drm_device *dev);

static inline void
i915_gem_object_pin_fence(struct drm_i915_gem_object *obj)
{
	if (obj->fence_reg != I915_FENCE_REG_NONE) {
		struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
		dev_priv->fence_regs[obj->fence_reg].pin_count++;
	}
}

static inline void
i915_gem_object_unpin_fence(struct drm_i915_gem_object *obj)
{
	if (obj->fence_reg != I915_FENCE_REG_NONE) {
		struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
		dev_priv->fence_regs[obj->fence_reg].pin_count--;
	}
}

void i915_gem_retire_requests(struct drm_device *dev);
void i915_gem_retire_requests_ring(struct intel_ring_buffer *ring);
void i915_gem_clflush_object(struct drm_i915_gem_object *obj);
struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
    size_t size);
int i915_gem_do_init(struct drm_device *dev, unsigned long start,
    unsigned long mappable_end, unsigned long end);
uint32_t i915_gem_get_unfenced_gtt_alignment(struct drm_device *dev,
    uint32_t size, int tiling_mode);
int i915_mutex_lock_interruptible(struct drm_device *dev);
int i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj,
    bool write);
int i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
    u32 alignment, struct intel_ring_buffer *pipelined);
int i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj);
int i915_gem_flush_ring(struct intel_ring_buffer *ring,
    uint32_t invalidate_domains, uint32_t flush_domains);
void i915_gem_release_mmap(struct drm_i915_gem_object *obj);
int i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj);
int i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
int i915_gem_idle(struct drm_device *dev);
int i915_gem_init_hw(struct drm_device *dev);
void i915_gem_init_swizzling(struct drm_device *dev);
void i915_gem_init_ppgtt(struct drm_device *dev);
void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
int i915_gpu_idle(struct drm_device *dev, bool do_retire);
void i915_gem_object_move_to_active(struct drm_i915_gem_object *obj,
    struct intel_ring_buffer *ring, uint32_t seqno);
int i915_add_request(struct intel_ring_buffer *ring, struct drm_file *file,
    struct drm_i915_gem_request *request);
int i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
    struct intel_ring_buffer *pipelined);
void i915_gem_reset(struct drm_device *dev);
int i915_wait_request(struct intel_ring_buffer *ring, uint32_t seqno,
    bool do_retire);
int i915_gem_mmap(struct drm_device *dev, uint64_t offset, int prot);
int i915_gem_fault(struct drm_device *dev, uint64_t offset, int prot,
    uint64_t *phys);
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);

void i915_gem_free_all_phys_object(struct drm_device *dev);
void i915_gem_detach_phys_object(struct drm_device *dev,
    struct drm_i915_gem_object *obj);
int i915_gem_attach_phys_object(struct drm_device *dev,
    struct drm_i915_gem_object *obj, int id, int align);

int i915_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
    struct drm_mode_create_dumb *args);
int i915_gem_mmap_gtt(struct drm_file *file_priv, struct drm_device *dev,
     uint32_t handle, uint64_t *offset);
int i915_gem_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
     uint32_t handle);

/* i915_gem_tiling.c */
void i915_gem_detect_bit_6_swizzle(struct drm_device *dev);
void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj);
void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj);

/* i915_gem_evict.c */
int i915_gem_evict_something(struct drm_device *dev, int min_size,
    unsigned alignment, bool mappable);
int i915_gem_evict_everything(struct drm_device *dev, bool purgeable_only);
int i915_gem_evict_inactive(struct drm_device *dev, bool purgeable_only);

/* i915_suspend.c */
extern int i915_save_state(struct drm_device *dev);
extern int i915_restore_state(struct drm_device *dev);

/* intel_iic.c */
extern int intel_setup_gmbus(struct drm_device *dev);
extern void intel_teardown_gmbus(struct drm_device *dev);
extern void intel_gmbus_set_speed(device_t idev, int speed);
extern void intel_gmbus_force_bit(device_t idev, bool force_bit);
extern void intel_iic_reset(struct drm_device *dev);

/* intel_opregion.c */
int intel_opregion_setup(struct drm_device *dev);
extern int intel_opregion_init(struct drm_device *dev);
extern void intel_opregion_fini(struct drm_device *dev);
extern void opregion_asle_intr(struct drm_device *dev);
extern void opregion_enable_asle(struct drm_device *dev);

/* i915_gem_gtt.c */
int i915_gem_init_aliasing_ppgtt(struct drm_device *dev);
void i915_gem_cleanup_aliasing_ppgtt(struct drm_device *dev);
void i915_ppgtt_bind_object(struct i915_hw_ppgtt *ppgtt,
    struct drm_i915_gem_object *obj, enum i915_cache_level cache_level);
void i915_ppgtt_unbind_object(struct i915_hw_ppgtt *ppgtt,
    struct drm_i915_gem_object *obj);

void i915_gem_restore_gtt_mappings(struct drm_device *dev);
int i915_gem_gtt_bind_object(struct drm_i915_gem_object *obj);
void i915_gem_gtt_unbind_object(struct drm_i915_gem_object *obj);
void i915_gem_gtt_rebind_object(struct drm_i915_gem_object *obj,
    enum i915_cache_level cache_level);

/* modesetting */
extern void intel_modeset_init(struct drm_device *dev);
extern void intel_modeset_gem_init(struct drm_device *dev);
extern void intel_modeset_cleanup(struct drm_device *dev);
extern int intel_modeset_vga_set_state(struct drm_device *dev, bool state);
extern bool intel_fbc_enabled(struct drm_device *dev);
extern void intel_disable_fbc(struct drm_device *dev);
extern bool ironlake_set_drps(struct drm_device *dev, u8 val);
extern void ironlake_init_pch_refclk(struct drm_device *dev);
extern void ironlake_enable_rc6(struct drm_device *dev);
extern void gen6_set_rps(struct drm_device *dev, u8 val);
extern void intel_detect_pch(struct drm_device *dev);
extern int intel_trans_dp_port_sel(struct drm_crtc *crtc);

extern void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
extern void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv);
extern void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
extern void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv);

extern struct intel_overlay_error_state *intel_overlay_capture_error_state(
    struct drm_device *dev);
extern void intel_overlay_print_error_state(struct sbuf *m,
    struct intel_overlay_error_state *error);
extern struct intel_display_error_state *intel_display_capture_error_state(
    struct drm_device *dev);
extern void intel_display_print_error_state(struct sbuf *m,
    struct drm_device *dev, struct intel_display_error_state *error);

static inline void
trace_i915_reg_rw(boolean_t rw, int reg, uint64_t val, int sz)
{

	CTR4(KTR_DRM_REG, "[%x/%d] %c %x", reg, sz, rw ? "w" : "r", val);
}

/* On SNB platform, before reading ring registers forcewake bit
 * must be set to prevent GT core from power down and stale values being
 * returned.
 */
void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
int __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv);

/* We give fast paths for the really cool registers */
#define NEEDS_FORCE_WAKE(dev_priv, reg) \
	(((dev_priv)->info->gen >= 6) && \
	 ((reg) < 0x40000) &&		 \
	 ((reg) != FORCEWAKE))

#define __i915_read(x, y) \
	u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg);

__i915_read(8, 8)
__i915_read(16, 16)
__i915_read(32, 32)
__i915_read(64, 64)
#undef __i915_read

#define __i915_write(x, y) \
	void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val);

__i915_write(8, 8)
__i915_write(16, 16)
__i915_write(32, 32)
__i915_write(64, 64)
#undef __i915_write

#define I915_READ8(reg)		i915_read8(dev_priv, (reg))
#define I915_WRITE8(reg, val)	i915_write8(dev_priv, (reg), (val))

#define I915_READ16(reg)	i915_read16(dev_priv, (reg))
#define I915_WRITE16(reg, val)	i915_write16(dev_priv, (reg), (val))
#define I915_READ16_NOTRACE(reg)	DRM_READ16(dev_priv->mmio_map, (reg))
#define I915_WRITE16_NOTRACE(reg, val)	DRM_WRITE16(dev_priv->mmio_map, (reg), (val))

#define I915_READ(reg)		i915_read32(dev_priv, (reg))
#define I915_WRITE(reg, val)	i915_write32(dev_priv, (reg), (val))
#define I915_READ_NOTRACE(reg)		DRM_READ32(dev_priv->mmio_map, (reg))
#define I915_WRITE_NOTRACE(reg, val)	DRM_WRITE32(dev_priv->mmio_map, (reg), (val))

#define I915_WRITE64(reg, val)	i915_write64(dev_priv, (reg), (val))
#define I915_READ64(reg)	i915_read64(dev_priv, (reg))

#define POSTING_READ(reg)	(void)I915_READ_NOTRACE(reg)
#define POSTING_READ16(reg)	(void)I915_READ16_NOTRACE(reg)

#define I915_VERBOSE 0

#define LP_RING(d) (&((struct drm_i915_private *)(d))->rings[RCS])

#define BEGIN_LP_RING(n) \
	intel_ring_begin(LP_RING(dev_priv), (n))

#define OUT_RING(x) \
	intel_ring_emit(LP_RING(dev_priv), x)

#define ADVANCE_LP_RING() \
	intel_ring_advance(LP_RING(dev_priv))

#define RING_LOCK_TEST_WITH_RETURN(dev, file) do {			\
	if (LP_RING(dev->dev_private)->obj == NULL)			\
		LOCK_TEST_WITH_RETURN(dev, file);			\
} while (0)

/**
 * Reads a dword out of the status page, which is written to from the command
 * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or
 * MI_STORE_DATA_IMM.
 *
 * The following dwords have a reserved meaning:
 * 0x00: ISR copy, updated when an ISR bit not set in the HWSTAM changes.
 * 0x04: ring 0 head pointer
 * 0x05: ring 1 head pointer (915-class)
 * 0x06: ring 2 head pointer (915-class)
 * 0x10-0x1b: Context status DWords (GM45)
 * 0x1f: Last written status offset. (GM45)
 *
 * The area from dword 0x20 to 0x3ff is available for driver usage.
 */
#define READ_HWSP(dev_priv, reg)  (((volatile u32*)(dev_priv->hw_status_page))[reg])
#define READ_BREADCRUMB(dev_priv) READ_HWSP(dev_priv, I915_BREADCRUMB_INDEX)
#define I915_GEM_HWS_INDEX		0x20
#define I915_BREADCRUMB_INDEX		0x21

#define INTEL_INFO(dev)	(((struct drm_i915_private *) (dev)->dev_private)->info)

#define IS_I830(dev)		((dev)->pci_device == 0x3577)
#define IS_845G(dev)		((dev)->pci_device == 0x2562)
#define IS_I85X(dev)		(INTEL_INFO(dev)->is_i85x)
#define IS_I865G(dev)		((dev)->pci_device == 0x2572)
#define IS_I915G(dev)		(INTEL_INFO(dev)->is_i915g)
#define IS_I915GM(dev)		((dev)->pci_device == 0x2592)
#define IS_I945G(dev)		((dev)->pci_device == 0x2772)
#define IS_I945GM(dev)		(INTEL_INFO(dev)->is_i945gm)
#define	IS_BROADWATER(dev)	(INTEL_INFO(dev)->is_broadwater)
#define	IS_CRESTLINE(dev)	(INTEL_INFO(dev)->is_crestline)
#define IS_GM45(dev)		((dev)->pci_device == 0x2A42)
#define IS_G4X(dev)		(INTEL_INFO(dev)->is_g4x)
#define IS_PINEVIEW_G(dev)	((dev)->pci_device == 0xa001)
#define IS_PINEVIEW_M(dev)	((dev)->pci_device == 0xa011)
#define IS_PINEVIEW(dev)	(INTEL_INFO(dev)->is_pineview)
#define IS_G33(dev)		(INTEL_INFO(dev)->is_g33)
#define IS_IRONLAKE_D(dev)	((dev)->pci_device == 0x0042)
#define IS_IRONLAKE_M(dev)	((dev)->pci_device == 0x0046)
#define	IS_IVYBRIDGE(dev)	(INTEL_INFO(dev)->is_ivybridge)
#define IS_MOBILE(dev)		(INTEL_INFO(dev)->is_mobile)

/* XXXKIB LEGACY */
#define IS_I965G(dev) ((dev)->pci_device == 0x2972 || \
		       (dev)->pci_device == 0x2982 || \
		       (dev)->pci_device == 0x2992 || \
		       (dev)->pci_device == 0x29A2 || \
		       (dev)->pci_device == 0x2A02 || \
		       (dev)->pci_device == 0x2A12 || \
		       (dev)->pci_device == 0x2A42 || \
		       (dev)->pci_device == 0x2E02 || \
		       (dev)->pci_device == 0x2E12 || \
		       (dev)->pci_device == 0x2E22 || \
		       (dev)->pci_device == 0x2E32)

#define IS_I965GM(dev) ((dev)->pci_device == 0x2A02)

#define IS_IGDG(dev) ((dev)->pci_device == 0xa001)
#define IS_IGDGM(dev) ((dev)->pci_device == 0xa011)
#define IS_IGD(dev) (IS_IGDG(dev) || IS_IGDGM(dev))

#define IS_I9XX(dev) (IS_I915G(dev) || IS_I915GM(dev) || IS_I945G(dev) || \
		      IS_I945GM(dev) || IS_I965G(dev) || IS_G33(dev))
/* XXXKIB LEGACY END */

#define IS_GEN2(dev)	(INTEL_INFO(dev)->gen == 2)
#define IS_GEN3(dev)	(INTEL_INFO(dev)->gen == 3)
#define IS_GEN4(dev)	(INTEL_INFO(dev)->gen == 4)
#define IS_GEN5(dev)	(INTEL_INFO(dev)->gen == 5)
#define IS_GEN6(dev)	(INTEL_INFO(dev)->gen == 6)
#define IS_GEN7(dev)	(INTEL_INFO(dev)->gen == 7)

#define HAS_BSD(dev)            (INTEL_INFO(dev)->has_bsd_ring)
#define HAS_BLT(dev)            (INTEL_INFO(dev)->has_blt_ring)
#define HAS_LLC(dev)            (INTEL_INFO(dev)->has_llc)
#define I915_NEED_GFX_HWS(dev)	(INTEL_INFO(dev)->need_gfx_hws)

#define HAS_ALIASING_PPGTT(dev)	(INTEL_INFO(dev)->gen >=6)

#define HAS_OVERLAY(dev)		(INTEL_INFO(dev)->has_overlay)
#define OVERLAY_NEEDS_PHYSICAL(dev)	(INTEL_INFO(dev)->overlay_needs_physical)

/* 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) (!IS_GEN2(dev) && !(IS_I915G(dev) || \
						      IS_I915GM(dev)))
#define SUPPORTS_DIGITAL_OUTPUTS(dev)	(!IS_GEN2(dev) && !IS_PINEVIEW(dev))
#define SUPPORTS_INTEGRATED_HDMI(dev)	(IS_G4X(dev) || IS_GEN5(dev))
#define SUPPORTS_INTEGRATED_DP(dev)	(IS_G4X(dev) || IS_GEN5(dev))
#define SUPPORTS_EDP(dev)		(IS_IRONLAKE_M(dev))
#define SUPPORTS_TV(dev)		(INTEL_INFO(dev)->supports_tv)
#define I915_HAS_HOTPLUG(dev)		 (INTEL_INFO(dev)->has_hotplug)
/* dsparb controlled by hw only */
#define DSPARB_HWCONTROL(dev) (IS_G4X(dev) || IS_IRONLAKE(dev))

#define HAS_FW_BLC(dev) (INTEL_INFO(dev)->gen > 2)
#define HAS_PIPE_CXSR(dev) (INTEL_INFO(dev)->has_pipe_cxsr)
#define I915_HAS_FBC(dev) (INTEL_INFO(dev)->has_fbc)

#define HAS_PCH_SPLIT(dev) (IS_GEN5(dev) || IS_GEN6(dev) || IS_IVYBRIDGE(dev))
#define HAS_PIPE_CONTROL(dev) (INTEL_INFO(dev)->gen >= 5)

#define INTEL_PCH_TYPE(dev) (((struct drm_i915_private *)(dev)->dev_private)->pch_type)
#define HAS_PCH_CPT(dev) (INTEL_PCH_TYPE(dev) == PCH_CPT)
#define HAS_PCH_IBX(dev) (INTEL_PCH_TYPE(dev) == PCH_IBX)

#define PRIMARY_RINGBUFFER_SIZE         (128*1024)

static inline bool
i915_seqno_passed(uint32_t seq1, uint32_t seq2)
{

	return ((int32_t)(seq1 - seq2) >= 0);
}

u32 i915_gem_next_request_seqno(struct intel_ring_buffer *ring);

#endif