i915/gvt/gvt.h

/*
 * Copyright(c) 2011-2016 Intel Corporation. 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, sublicense,
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Authors:
 *    Kevin Tian <kevin.tian@intel.com>
 *    Eddie Dong <eddie.dong@intel.com>
 *
 * Contributors:
 *    Niu Bing <bing.niu@intel.com>
 *    Zhi Wang <zhi.a.wang@intel.com>
 *
 */

#ifndef _GVT_H_
#define _GVT_H_

#include <uapi/linux/pci_regs.h>
#include <linux/kvm_host.h>
#include <linux/vfio.h>
#include <linux/mdev.h>

#include "i915_drv.h"
#include "intel_gvt.h"

#include "debug.h"
#include "mmio.h"
#include "reg.h"
#include "interrupt.h"
#include "gtt.h"
#include "display.h"
#include "edid.h"
#include "execlist.h"
#include "scheduler.h"
#include "sched_policy.h"
#include "mmio_context.h"
#include "cmd_parser.h"
#include "fb_decoder.h"
#include "dmabuf.h"
#include "page_track.h"

#define GVT_MAX_VGPU 8

/* Describe per-platform limitations. */
struct intel_gvt_device_info {
	u32 max_support_vgpus;
	u32 cfg_space_size;
	u32 mmio_size;
	u32 mmio_bar;
	unsigned long msi_cap_offset;
	u32 gtt_start_offset;
	u32 gtt_entry_size;
	u32 gtt_entry_size_shift;
	int gmadr_bytes_in_cmd;
	u32 max_surface_size;
};

/* GM resources owned by a vGPU */
struct intel_vgpu_gm {
	u64 aperture_sz;
	u64 hidden_sz;
	struct drm_mm_node low_gm_node;
	struct drm_mm_node high_gm_node;
};

#define INTEL_GVT_MAX_NUM_FENCES 32

/* Fences owned by a vGPU */
struct intel_vgpu_fence {
	struct i915_fence_reg *regs[INTEL_GVT_MAX_NUM_FENCES];
	u32 base;
	u32 size;
};

struct intel_vgpu_mmio {
	void *vreg;
};

#define INTEL_GVT_MAX_BAR_NUM 4

struct intel_vgpu_pci_bar {
	u64 size;
	bool tracked;
};

struct intel_vgpu_cfg_space {
	unsigned char virtual_cfg_space[PCI_CFG_SPACE_EXP_SIZE];
	struct intel_vgpu_pci_bar bar[INTEL_GVT_MAX_BAR_NUM];
	u32 pmcsr_off;
};

#define vgpu_cfg_space(vgpu) ((vgpu)->cfg_space.virtual_cfg_space)

struct intel_vgpu_irq {
	bool irq_warn_once[INTEL_GVT_EVENT_MAX];
	DECLARE_BITMAP(flip_done_event[I915_MAX_PIPES],
		       INTEL_GVT_EVENT_MAX);
};

struct intel_vgpu_opregion {
	bool mapped;
	void *va;
	u32 gfn[INTEL_GVT_OPREGION_PAGES];
};

#define vgpu_opregion(vgpu) (&(vgpu->opregion))

struct intel_vgpu_display {
	struct intel_vgpu_i2c_edid i2c_edid;
	struct intel_vgpu_port ports[I915_MAX_PORTS];
	struct intel_vgpu_sbi sbi;
	enum port port_num;
};

struct vgpu_sched_ctl {
	int weight;
};

enum {
	INTEL_VGPU_EXECLIST_SUBMISSION = 1,
	INTEL_VGPU_GUC_SUBMISSION,
};

struct intel_vgpu_submission_ops {
	const char *name;
	int (*init)(struct intel_vgpu *vgpu, intel_engine_mask_t engine_mask);
	void (*clean)(struct intel_vgpu *vgpu, intel_engine_mask_t engine_mask);
	void (*reset)(struct intel_vgpu *vgpu, intel_engine_mask_t engine_mask);
};

struct intel_vgpu_submission {
	struct intel_vgpu_execlist execlist[I915_NUM_ENGINES];
	struct list_head workload_q_head[I915_NUM_ENGINES];
	struct intel_context *shadow[I915_NUM_ENGINES];
	struct kmem_cache *workloads;
	atomic_t running_workload_num;
	union {
		u64 i915_context_pml4;
		u64 i915_context_pdps[GEN8_3LVL_PDPES];
	};
	DECLARE_BITMAP(shadow_ctx_desc_updated, I915_NUM_ENGINES);
	DECLARE_BITMAP(tlb_handle_pending, I915_NUM_ENGINES);
	void *ring_scan_buffer[I915_NUM_ENGINES];
	int ring_scan_buffer_size[I915_NUM_ENGINES];
	const struct intel_vgpu_submission_ops *ops;
	int virtual_submission_interface;
	bool active;
	struct {
		u32 lrca;
		bool valid;
		u64 ring_context_gpa;
	} last_ctx[I915_NUM_ENGINES];
};

#define KVMGT_DEBUGFS_FILENAME		"kvmgt_nr_cache_entries"

enum {
	INTEL_VGPU_STATUS_ATTACHED = 0,
	INTEL_VGPU_STATUS_ACTIVE,
	INTEL_VGPU_STATUS_NR_BITS,
};

struct intel_vgpu {
	struct vfio_device vfio_device;
	struct intel_gvt *gvt;
	struct mutex vgpu_lock;
	int id;
	DECLARE_BITMAP(status, INTEL_VGPU_STATUS_NR_BITS);
	bool pv_notified;
	bool failsafe;
	unsigned int resetting_eng;

	/* Both sched_data and sched_ctl can be seen a part of the global gvt
	 * scheduler structure. So below 2 vgpu data are protected
	 * by sched_lock, not vgpu_lock.
	 */
	void *sched_data;
	struct vgpu_sched_ctl sched_ctl;

	struct intel_vgpu_fence fence;
	struct intel_vgpu_gm gm;
	struct intel_vgpu_cfg_space cfg_space;
	struct intel_vgpu_mmio mmio;
	struct intel_vgpu_irq irq;
	struct intel_vgpu_gtt gtt;
	struct intel_vgpu_opregion opregion;
	struct intel_vgpu_display display;
	struct intel_vgpu_submission submission;
	struct radix_tree_root page_track_tree;
	u32 hws_pga[I915_NUM_ENGINES];
	/* Set on PCI_D3, reset on DMLR, not reflecting the actual PM state */
	bool d3_entered;

	struct dentry *debugfs;

	struct list_head dmabuf_obj_list_head;
	struct mutex dmabuf_lock;
	struct idr object_idr;
	struct intel_vgpu_vblank_timer vblank_timer;

	u32 scan_nonprivbb;

	struct vfio_region *region;
	int num_regions;
	struct eventfd_ctx *intx_trigger;
	struct eventfd_ctx *msi_trigger;

	/*
	 * Two caches are used to avoid mapping duplicated pages (eg.
	 * scratch pages). This help to reduce dma setup overhead.
	 */
	struct rb_root gfn_cache;
	struct rb_root dma_addr_cache;
	unsigned long nr_cache_entries;
	struct mutex cache_lock;

	struct kvm_page_track_notifier_node track_node;
#define NR_BKT (1 << 18)
	struct hlist_head ptable[NR_BKT];
#undef NR_BKT
};

/* validating GM healthy status*/
#define vgpu_is_vm_unhealthy(ret_val) \
	(((ret_val) == -EBADRQC) || ((ret_val) == -EFAULT))

struct intel_gvt_gm {
	unsigned long vgpu_allocated_low_gm_size;
	unsigned long vgpu_allocated_high_gm_size;
};

struct intel_gvt_fence {
	unsigned long vgpu_allocated_fence_num;
};

/* Special MMIO blocks. */
struct gvt_mmio_block {
	unsigned int device;
	i915_reg_t   offset;
	unsigned int size;
	gvt_mmio_func read;
	gvt_mmio_func write;
};

#define INTEL_GVT_MMIO_HASH_BITS 11

struct intel_gvt_mmio {
	u16 *mmio_attribute;
/* Register contains RO bits */
#define F_RO		(1 << 0)
/* Register contains graphics address */
#define F_GMADR		(1 << 1)
/* Mode mask registers with high 16 bits as the mask bits */
#define F_MODE_MASK	(1 << 2)
/* This reg can be accessed by GPU commands */
#define F_CMD_ACCESS	(1 << 3)
/* This reg has been accessed by a VM */
#define F_ACCESSED	(1 << 4)
/* This reg requires save & restore during host PM suspend/resume */
#define F_PM_SAVE	(1 << 5)
/* This reg could be accessed by unaligned address */
#define F_UNALIGN	(1 << 6)
/* This reg is in GVT's mmio save-restor list and in hardware
 * logical context image
 */
#define F_SR_IN_CTX	(1 << 7)
/* Value of command write of this reg needs to be patched */
#define F_CMD_WRITE_PATCH	(1 << 8)

	struct gvt_mmio_block *mmio_block;
	unsigned int num_mmio_block;

	DECLARE_HASHTABLE(mmio_info_table, INTEL_GVT_MMIO_HASH_BITS);
	unsigned long num_tracked_mmio;
};

struct intel_gvt_firmware {
	void *cfg_space;
	void *mmio;
	bool firmware_loaded;
};

struct intel_vgpu_config {
	unsigned int low_mm;
	unsigned int high_mm;
	unsigned int fence;

	/*
	 * A vGPU with a weight of 8 will get twice as much GPU as a vGPU with
	 * a weight of 4 on a contended host, different vGPU type has different
	 * weight set. Legal weights range from 1 to 16.
	 */
	unsigned int weight;
	enum intel_vgpu_edid edid;
	const char *name;
};

struct intel_vgpu_type {
	struct mdev_type type;
	char name[16];
	const struct intel_vgpu_config *conf;
};

struct intel_gvt {
	/* GVT scope lock, protect GVT itself, and all resource currently
	 * not yet protected by special locks(vgpu and scheduler lock).
	 */
	struct mutex lock;
	/* scheduler scope lock, protect gvt and vgpu schedule related data */
	struct mutex sched_lock;

	struct intel_gt *gt;
	struct idr vgpu_idr;	/* vGPU IDR pool */

	struct intel_gvt_device_info device_info;
	struct intel_gvt_gm gm;
	struct intel_gvt_fence fence;
	struct intel_gvt_mmio mmio;
	struct intel_gvt_firmware firmware;
	struct intel_gvt_irq irq;
	struct intel_gvt_gtt gtt;
	struct intel_gvt_workload_scheduler scheduler;
	struct notifier_block shadow_ctx_notifier_block[I915_NUM_ENGINES];
	DECLARE_HASHTABLE(cmd_table, GVT_CMD_HASH_BITS);
	struct mdev_parent parent;
	struct mdev_type **mdev_types;
	struct intel_vgpu_type *types;
	unsigned int num_types;
	struct intel_vgpu *idle_vgpu;

	struct task_struct *service_thread;
	wait_queue_head_t service_thread_wq;

	/* service_request is always used in bit operation, we should always
	 * use it with atomic bit ops so that no need to use gvt big lock.
	 */
	unsigned long service_request;

	struct {
		struct engine_mmio *mmio;
		int ctx_mmio_count[I915_NUM_ENGINES];
		u32 *tlb_mmio_offset_list;
		u32 tlb_mmio_offset_list_cnt;
		u32 *mocs_mmio_offset_list;
		u32 mocs_mmio_offset_list_cnt;
	} engine_mmio_list;
	bool is_reg_whitelist_updated;

	struct dentry *debugfs_root;
};

static inline struct intel_gvt *to_gvt(struct drm_i915_private *i915)
{
	return i915->gvt;
}

enum {
	/* Scheduling trigger by timer */
	INTEL_GVT_REQUEST_SCHED = 0,

	/* Scheduling trigger by event */
	INTEL_GVT_REQUEST_EVENT_SCHED = 1,

	/* per-vGPU vblank emulation request */
	INTEL_GVT_REQUEST_EMULATE_VBLANK = 2,
	INTEL_GVT_REQUEST_EMULATE_VBLANK_MAX = INTEL_GVT_REQUEST_EMULATE_VBLANK
		+ GVT_MAX_VGPU,
};

static inline void intel_gvt_request_service(struct intel_gvt *gvt,
		int service)
{
	set_bit(service, (void *)&gvt->service_request);
	wake_up(&gvt->service_thread_wq);
}

void intel_gvt_free_firmware(struct intel_gvt *gvt);
int intel_gvt_load_firmware(struct intel_gvt *gvt);

/* Aperture/GM space definitions for GVT device */
#define MB_TO_BYTES(mb) ((mb) << 20ULL)
#define BYTES_TO_MB(b) ((b) >> 20ULL)

#define HOST_LOW_GM_SIZE MB_TO_BYTES(128)
#define HOST_HIGH_GM_SIZE MB_TO_BYTES(384)
#define HOST_FENCE 4

#define gvt_to_ggtt(gvt)	((gvt)->gt->ggtt)

/* Aperture/GM space definitions for GVT device */
#define gvt_aperture_sz(gvt)	  gvt_to_ggtt(gvt)->mappable_end
#define gvt_aperture_pa_base(gvt) gvt_to_ggtt(gvt)->gmadr.start

#define gvt_ggtt_gm_sz(gvt)	gvt_to_ggtt(gvt)->vm.total
#define gvt_ggtt_sz(gvt)	(gvt_to_ggtt(gvt)->vm.total >> PAGE_SHIFT << 3)
#define gvt_hidden_sz(gvt)	(gvt_ggtt_gm_sz(gvt) - gvt_aperture_sz(gvt))

#define gvt_aperture_gmadr_base(gvt) (0)
#define gvt_aperture_gmadr_end(gvt) (gvt_aperture_gmadr_base(gvt) \
				     + gvt_aperture_sz(gvt) - 1)

#define gvt_hidden_gmadr_base(gvt) (gvt_aperture_gmadr_base(gvt) \
				    + gvt_aperture_sz(gvt))
#define gvt_hidden_gmadr_end(gvt) (gvt_hidden_gmadr_base(gvt) \
				   + gvt_hidden_sz(gvt) - 1)

#define gvt_fence_sz(gvt) (gvt_to_ggtt(gvt)->num_fences)

/* Aperture/GM space definitions for vGPU */
#define vgpu_aperture_offset(vgpu)	((vgpu)->gm.low_gm_node.start)
#define vgpu_hidden_offset(vgpu)	((vgpu)->gm.high_gm_node.start)
#define vgpu_aperture_sz(vgpu)		((vgpu)->gm.aperture_sz)
#define vgpu_hidden_sz(vgpu)		((vgpu)->gm.hidden_sz)

#define vgpu_aperture_pa_base(vgpu) \
	(gvt_aperture_pa_base(vgpu->gvt) + vgpu_aperture_offset(vgpu))

#define vgpu_ggtt_gm_sz(vgpu) ((vgpu)->gm.aperture_sz + (vgpu)->gm.hidden_sz)

#define vgpu_aperture_pa_end(vgpu) \
	(vgpu_aperture_pa_base(vgpu) + vgpu_aperture_sz(vgpu) - 1)

#define vgpu_aperture_gmadr_base(vgpu) (vgpu_aperture_offset(vgpu))
#define vgpu_aperture_gmadr_end(vgpu) \
	(vgpu_aperture_gmadr_base(vgpu) + vgpu_aperture_sz(vgpu) - 1)

#define vgpu_hidden_gmadr_base(vgpu) (vgpu_hidden_offset(vgpu))
#define vgpu_hidden_gmadr_end(vgpu) \
	(vgpu_hidden_gmadr_base(vgpu) + vgpu_hidden_sz(vgpu) - 1)

#define vgpu_fence_base(vgpu) (vgpu->fence.base)
#define vgpu_fence_sz(vgpu) (vgpu->fence.size)

/* ring context size i.e. the first 0x50 dwords*/
#define RING_CTX_SIZE 320

int intel_vgpu_alloc_resource(struct intel_vgpu *vgpu,
			      const struct intel_vgpu_config *conf);
void intel_vgpu_reset_resource(struct intel_vgpu *vgpu);
void intel_vgpu_free_resource(struct intel_vgpu *vgpu);
void intel_vgpu_write_fence(struct intel_vgpu *vgpu,
	u32 fence, u64 value);

/* Macros for easily accessing vGPU virtual/shadow register.
   Explicitly seperate use for typed MMIO reg or real offset.*/
#define vgpu_vreg_t(vgpu, reg) \
	(*(u32 *)(vgpu->mmio.vreg + i915_mmio_reg_offset(reg)))
#define vgpu_vreg(vgpu, offset) \
	(*(u32 *)(vgpu->mmio.vreg + (offset)))
#define vgpu_vreg64_t(vgpu, reg) \
	(*(u64 *)(vgpu->mmio.vreg + i915_mmio_reg_offset(reg)))
#define vgpu_vreg64(vgpu, offset) \
	(*(u64 *)(vgpu->mmio.vreg + (offset)))

#define for_each_active_vgpu(gvt, vgpu, id) \
	idr_for_each_entry((&(gvt)->vgpu_idr), (vgpu), (id)) \
		for_each_if(test_bit(INTEL_VGPU_STATUS_ACTIVE, vgpu->status))

static inline void intel_vgpu_write_pci_bar(struct intel_vgpu *vgpu,
					    u32 offset, u32 val, bool low)
{
	u32 *pval;

	/* BAR offset should be 32 bits algiend */
	offset = rounddown(offset, 4);
	pval = (u32 *)(vgpu_cfg_space(vgpu) + offset);

	if (low) {
		/*
		 * only update bit 31 - bit 4,
		 * leave the bit 3 - bit 0 unchanged.
		 */
		*pval = (val & GENMASK(31, 4)) | (*pval & GENMASK(3, 0));
	} else {
		*pval = val;
	}
}

int intel_gvt_init_vgpu_types(struct intel_gvt *gvt);
void intel_gvt_clean_vgpu_types(struct intel_gvt *gvt);

struct intel_vgpu *intel_gvt_create_idle_vgpu(struct intel_gvt *gvt);
void intel_gvt_destroy_idle_vgpu(struct intel_vgpu *vgpu);
int intel_gvt_create_vgpu(struct intel_vgpu *vgpu,
			  const struct intel_vgpu_config *conf);
void intel_gvt_destroy_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_release_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
				 intel_engine_mask_t engine_mask);
void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_activate_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_deactivate_vgpu(struct intel_vgpu *vgpu);

int intel_gvt_set_opregion(struct intel_vgpu *vgpu);
int intel_gvt_set_edid(struct intel_vgpu *vgpu, int port_num);

/* validating GM functions */
#define vgpu_gmadr_is_aperture(vgpu, gmadr) \
	((gmadr >= vgpu_aperture_gmadr_base(vgpu)) && \
	 (gmadr <= vgpu_aperture_gmadr_end(vgpu)))

#define vgpu_gmadr_is_hidden(vgpu, gmadr) \
	((gmadr >= vgpu_hidden_gmadr_base(vgpu)) && \
	 (gmadr <= vgpu_hidden_gmadr_end(vgpu)))

#define vgpu_gmadr_is_valid(vgpu, gmadr) \
	 ((vgpu_gmadr_is_aperture(vgpu, gmadr) || \
	  (vgpu_gmadr_is_hidden(vgpu, gmadr))))

#define gvt_gmadr_is_aperture(gvt, gmadr) \
	 ((gmadr >= gvt_aperture_gmadr_base(gvt)) && \
	  (gmadr <= gvt_aperture_gmadr_end(gvt)))

#define gvt_gmadr_is_hidden(gvt, gmadr) \
	  ((gmadr >= gvt_hidden_gmadr_base(gvt)) && \
	   (gmadr <= gvt_hidden_gmadr_end(gvt)))

#define gvt_gmadr_is_valid(gvt, gmadr) \
	  (gvt_gmadr_is_aperture(gvt, gmadr) || \
	    gvt_gmadr_is_hidden(gvt, gmadr))

bool intel_gvt_ggtt_validate_range(struct intel_vgpu *vgpu, u64 addr, u32 size);
int intel_gvt_ggtt_gmadr_g2h(struct intel_vgpu *vgpu, u64 g_addr, u64 *h_addr);
int intel_gvt_ggtt_gmadr_h2g(struct intel_vgpu *vgpu, u64 h_addr, u64 *g_addr);
int intel_gvt_ggtt_index_g2h(struct intel_vgpu *vgpu, unsigned long g_index,
			     unsigned long *h_index);
int intel_gvt_ggtt_h2g_index(struct intel_vgpu *vgpu, unsigned long h_index,
			     unsigned long *g_index);

void intel_vgpu_init_cfg_space(struct intel_vgpu *vgpu,
		bool primary);
void intel_vgpu_reset_cfg_space(struct intel_vgpu *vgpu);

int intel_vgpu_emulate_cfg_read(struct intel_vgpu *vgpu, unsigned int offset,
		void *p_data, unsigned int bytes);

int intel_vgpu_emulate_cfg_write(struct intel_vgpu *vgpu, unsigned int offset,
		void *p_data, unsigned int bytes);

void intel_vgpu_emulate_hotplug(struct intel_vgpu *vgpu, bool connected);

static inline u64 intel_vgpu_get_bar_gpa(struct intel_vgpu *vgpu, int bar)
{
	/* We are 64bit bar. */
	return (*(u64 *)(vgpu->cfg_space.virtual_cfg_space + bar)) &
			PCI_BASE_ADDRESS_MEM_MASK;
}

void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu);
int intel_vgpu_init_opregion(struct intel_vgpu *vgpu);
int intel_vgpu_opregion_base_write_handler(struct intel_vgpu *vgpu, u32 gpa);

int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci);
void populate_pvinfo_page(struct intel_vgpu *vgpu);

int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload);
void enter_failsafe_mode(struct intel_vgpu *vgpu, int reason);
void intel_vgpu_detach_regions(struct intel_vgpu *vgpu);

enum {
	GVT_FAILSAFE_UNSUPPORTED_GUEST,
	GVT_FAILSAFE_INSUFFICIENT_RESOURCE,
	GVT_FAILSAFE_GUEST_ERR,
};

static inline void mmio_hw_access_pre(struct intel_gt *gt)
{
	intel_runtime_pm_get(gt->uncore->rpm);
}

static inline void mmio_hw_access_post(struct intel_gt *gt)
{
	intel_runtime_pm_put_unchecked(gt->uncore->rpm);
}

/**
 * intel_gvt_mmio_set_accessed - mark a MMIO has been accessed
 * @gvt: a GVT device
 * @offset: register offset
 *
 */
static inline void intel_gvt_mmio_set_accessed(
			struct intel_gvt *gvt, unsigned int offset)
{
	gvt->mmio.mmio_attribute[offset >> 2] |= F_ACCESSED;
}

/**
 * intel_gvt_mmio_is_cmd_accessible - if a MMIO could be accessed by command
 * @gvt: a GVT device
 * @offset: register offset
 *
 * Returns:
 * True if an MMIO is able to be accessed by GPU commands
 */
static inline bool intel_gvt_mmio_is_cmd_accessible(
			struct intel_gvt *gvt, unsigned int offset)
{
	return gvt->mmio.mmio_attribute[offset >> 2] & F_CMD_ACCESS;
}

/**
 * intel_gvt_mmio_set_cmd_accessible -
 *				mark a MMIO could be accessible by command
 * @gvt: a GVT device
 * @offset: register offset
 *
 */
static inline void intel_gvt_mmio_set_cmd_accessible(
			struct intel_gvt *gvt, unsigned int offset)
{
	gvt->mmio.mmio_attribute[offset >> 2] |= F_CMD_ACCESS;
}

/**
 * intel_gvt_mmio_is_unalign - mark a MMIO could be accessed unaligned
 * @gvt: a GVT device
 * @offset: register offset
 *
 */
static inline bool intel_gvt_mmio_is_unalign(
			struct intel_gvt *gvt, unsigned int offset)
{
	return gvt->mmio.mmio_attribute[offset >> 2] & F_UNALIGN;
}

/**
 * intel_gvt_mmio_has_mode_mask - if a MMIO has a mode mask
 * @gvt: a GVT device
 * @offset: register offset
 *
 * Returns:
 * True if a MMIO has a mode mask in its higher 16 bits, false if it isn't.
 *
 */
static inline bool intel_gvt_mmio_has_mode_mask(
			struct intel_gvt *gvt, unsigned int offset)
{
	return gvt->mmio.mmio_attribute[offset >> 2] & F_MODE_MASK;
}

/**
 * intel_gvt_mmio_is_sr_in_ctx -
 *		check if an MMIO has F_SR_IN_CTX mask
 * @gvt: a GVT device
 * @offset: register offset
 *
 * Returns:
 * True if an MMIO has an F_SR_IN_CTX  mask, false if it isn't.
 *
 */
static inline bool intel_gvt_mmio_is_sr_in_ctx(
			struct intel_gvt *gvt, unsigned int offset)
{
	return gvt->mmio.mmio_attribute[offset >> 2] & F_SR_IN_CTX;
}

/**
 * intel_gvt_mmio_set_sr_in_ctx -
 *		mask an MMIO in GVT's mmio save-restore list and also
 *		in hardware logical context image
 * @gvt: a GVT device
 * @offset: register offset
 *
 */
static inline void intel_gvt_mmio_set_sr_in_ctx(
			struct intel_gvt *gvt, unsigned int offset)
{
	gvt->mmio.mmio_attribute[offset >> 2] |= F_SR_IN_CTX;
}

void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu);
/**
 * intel_gvt_mmio_set_cmd_write_patch -
 *				mark an MMIO if its cmd write needs to be
 *				patched
 * @gvt: a GVT device
 * @offset: register offset
 *
 */
static inline void intel_gvt_mmio_set_cmd_write_patch(
			struct intel_gvt *gvt, unsigned int offset)
{
	gvt->mmio.mmio_attribute[offset >> 2] |= F_CMD_WRITE_PATCH;
}

/**
 * intel_gvt_mmio_is_cmd_write_patch - check if an mmio's cmd access needs to
 * be patched
 * @gvt: a GVT device
 * @offset: register offset
 *
 * Returns:
 * True if GPU commmand write to an MMIO should be patched
 */
static inline bool intel_gvt_mmio_is_cmd_write_patch(
			struct intel_gvt *gvt, unsigned int offset)
{
	return gvt->mmio.mmio_attribute[offset >> 2] & F_CMD_WRITE_PATCH;
}

/**
 * intel_gvt_read_gpa - copy data from GPA to host data buffer
 * @vgpu: a vGPU
 * @gpa: guest physical address
 * @buf: host data buffer
 * @len: data length
 *
 * Returns:
 * Zero on success, negative error code if failed.
 */
static inline int intel_gvt_read_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
		void *buf, unsigned long len)
{
	if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
		return -ESRCH;
	return vfio_dma_rw(&vgpu->vfio_device, gpa, buf, len, false);
}

/**
 * intel_gvt_write_gpa - copy data from host data buffer to GPA
 * @vgpu: a vGPU
 * @gpa: guest physical address
 * @buf: host data buffer
 * @len: data length
 *
 * Returns:
 * Zero on success, negative error code if failed.
 */
static inline int intel_gvt_write_gpa(struct intel_vgpu *vgpu,
		unsigned long gpa, void *buf, unsigned long len)
{
	if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status))
		return -ESRCH;
	return vfio_dma_rw(&vgpu->vfio_device, gpa, buf, len, true);
}

void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_debugfs_init(struct intel_gvt *gvt);
void intel_gvt_debugfs_clean(struct intel_gvt *gvt);

int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn);
int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn);
int intel_gvt_dma_pin_guest_page(struct intel_vgpu *vgpu, dma_addr_t dma_addr);
int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
		unsigned long size, dma_addr_t *dma_addr);
void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
		dma_addr_t dma_addr);

#include "trace.h"

#endif