include/linux/intel-iommu.h - kernel/msm-4.19 - Gitiles

 /*
  * Copyright © 2006-2015, Intel Corporation.
  *
  * Authors: Ashok Raj <ashok.raj@intel.com>
  *          Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
  *          David Woodhouse <David.Woodhouse@intel.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
  * version 2, as published by the Free Software Foundation.
  *
  * This program is distributed in the hope it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  * Place - Suite 330, Boston, MA 02111-1307 USA.
  */

 #ifndef _INTEL_IOMMU_H_
 #define _INTEL_IOMMU_H_

 #include <linux/types.h>
 #include <linux/iova.h>
 #include <linux/io.h>
 #include <linux/idr.h>
 #include <linux/dma_remapping.h>
 #include <linux/mmu_notifier.h>
 #include <linux/list.h>
 #include <linux/iommu.h>
 #include <asm/cacheflush.h>
 #include <asm/iommu.h>

 /*
  * Intel IOMMU register specification per version 1.0 public spec.
  */

 #define	DMAR_VER_REG	0x0	/* Arch version supported by this IOMMU */
 #define	DMAR_CAP_REG	0x8	/* Hardware supported capabilities */
 #define	DMAR_ECAP_REG	0x10	/* Extended capabilities supported */
 #define	DMAR_GCMD_REG	0x18	/* Global command register */
 #define	DMAR_GSTS_REG	0x1c	/* Global status register */
 #define	DMAR_RTADDR_REG	0x20	/* Root entry table */
 #define	DMAR_CCMD_REG	0x28	/* Context command reg */
 #define	DMAR_FSTS_REG	0x34	/* Fault Status register */
 #define	DMAR_FECTL_REG	0x38	/* Fault control register */
 #define	DMAR_FEDATA_REG	0x3c	/* Fault event interrupt data register */
 #define	DMAR_FEADDR_REG	0x40	/* Fault event interrupt addr register */
 #define	DMAR_FEUADDR_REG 0x44	/* Upper address register */
 #define	DMAR_AFLOG_REG	0x58	/* Advanced Fault control */
 #define	DMAR_PMEN_REG	0x64	/* Enable Protected Memory Region */
 #define	DMAR_PLMBASE_REG 0x68	/* PMRR Low addr */
 #define	DMAR_PLMLIMIT_REG 0x6c	/* PMRR low limit */
 #define	DMAR_PHMBASE_REG 0x70	/* pmrr high base addr */
 #define	DMAR_PHMLIMIT_REG 0x78	/* pmrr high limit */
 #define DMAR_IQH_REG	0x80	/* Invalidation queue head register */
 #define DMAR_IQT_REG	0x88	/* Invalidation queue tail register */
 #define DMAR_IQ_SHIFT	4	/* Invalidation queue head/tail shift */
 #define DMAR_IQA_REG	0x90	/* Invalidation queue addr register */
 #define DMAR_ICS_REG	0x9c	/* Invalidation complete status register */
 #define DMAR_IRTA_REG	0xb8    /* Interrupt remapping table addr register */
 #define DMAR_PQH_REG	0xc0	/* Page request queue head register */
 #define DMAR_PQT_REG	0xc8	/* Page request queue tail register */
 #define DMAR_PQA_REG	0xd0	/* Page request queue address register */
 #define DMAR_PRS_REG	0xdc	/* Page request status register */
 #define DMAR_PECTL_REG	0xe0	/* Page request event control register */
 #define	DMAR_PEDATA_REG	0xe4	/* Page request event interrupt data register */
 #define	DMAR_PEADDR_REG	0xe8	/* Page request event interrupt addr register */
 #define	DMAR_PEUADDR_REG 0xec	/* Page request event Upper address register */

 #define OFFSET_STRIDE		(9)

 #ifdef CONFIG_64BIT
 #define dmar_readq(a) readq(a)
 #define dmar_writeq(a,v) writeq(v,a)
 #else
 static inline u64 dmar_readq(void __iomem *addr)
 {
 	u32 lo, hi;
 	lo = readl(addr);
 	hi = readl(addr + 4);
 	return (((u64) hi) << 32) + lo;
 }

 static inline void dmar_writeq(void __iomem *addr, u64 val)
 {
 	writel((u32)val, addr);
 	writel((u32)(val >> 32), addr + 4);
 }
 #endif

 #define DMAR_VER_MAJOR(v)		(((v) & 0xf0) >> 4)
 #define DMAR_VER_MINOR(v)		((v) & 0x0f)

 /*
  * Decoding Capability Register
  */
 #define cap_pi_support(c)	(((c) >> 59) & 1)
 #define cap_read_drain(c)	(((c) >> 55) & 1)
 #define cap_write_drain(c)	(((c) >> 54) & 1)
 #define cap_max_amask_val(c)	(((c) >> 48) & 0x3f)
 #define cap_num_fault_regs(c)	((((c) >> 40) & 0xff) + 1)
 #define cap_pgsel_inv(c)	(((c) >> 39) & 1)

 #define cap_super_page_val(c)	(((c) >> 34) & 0xf)
 #define cap_super_offset(c)	(((find_first_bit(&cap_super_page_val(c), 4)) \
 					* OFFSET_STRIDE) + 21)

 #define cap_fault_reg_offset(c)	((((c) >> 24) & 0x3ff) * 16)
 #define cap_max_fault_reg_offset(c) \
 	(cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)

 #define cap_zlr(c)		(((c) >> 22) & 1)
 #define cap_isoch(c)		(((c) >> 23) & 1)
 #define cap_mgaw(c)		((((c) >> 16) & 0x3f) + 1)
 #define cap_sagaw(c)		(((c) >> 8) & 0x1f)
 #define cap_caching_mode(c)	(((c) >> 7) & 1)
 #define cap_phmr(c)		(((c) >> 6) & 1)
 #define cap_plmr(c)		(((c) >> 5) & 1)
 #define cap_rwbf(c)		(((c) >> 4) & 1)
 #define cap_afl(c)		(((c) >> 3) & 1)
 #define cap_ndoms(c)		(((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
 /*
  * Extended Capability Register
  */

 #define ecap_pasid(e)		((e >> 40) & 0x1)
 #define ecap_pss(e)		((e >> 35) & 0x1f)
 #define ecap_eafs(e)		((e >> 34) & 0x1)
 #define ecap_nwfs(e)		((e >> 33) & 0x1)
 #define ecap_srs(e)		((e >> 31) & 0x1)
 #define ecap_ers(e)		((e >> 30) & 0x1)
 #define ecap_prs(e)		((e >> 29) & 0x1)
 #define ecap_broken_pasid(e)	((e >> 28) & 0x1)
 #define ecap_dis(e)		((e >> 27) & 0x1)
 #define ecap_nest(e)		((e >> 26) & 0x1)
 #define ecap_mts(e)		((e >> 25) & 0x1)
 #define ecap_ecs(e)		((e >> 24) & 0x1)
 #define ecap_iotlb_offset(e) 	((((e) >> 8) & 0x3ff) * 16)
 #define ecap_max_iotlb_offset(e) (ecap_iotlb_offset(e) + 16)
 #define ecap_coherent(e)	((e) & 0x1)
 #define ecap_qis(e)		((e) & 0x2)
 #define ecap_pass_through(e)	((e >> 6) & 0x1)
 #define ecap_eim_support(e)	((e >> 4) & 0x1)
 #define ecap_ir_support(e)	((e >> 3) & 0x1)
 #define ecap_dev_iotlb_support(e)	(((e) >> 2) & 0x1)
 #define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
 #define ecap_sc_support(e)	((e >> 7) & 0x1) /* Snooping Control */

 /* IOTLB_REG */
 #define DMA_TLB_FLUSH_GRANU_OFFSET  60
 #define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
 #define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
 #define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
 #define DMA_TLB_IIRG(type) ((type >> 60) & 3)
 #define DMA_TLB_IAIG(val) (((val) >> 57) & 3)
 #define DMA_TLB_READ_DRAIN (((u64)1) << 49)
 #define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
 #define DMA_TLB_DID(id)	(((u64)((id) & 0xffff)) << 32)
 #define DMA_TLB_IVT (((u64)1) << 63)
 #define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
 #define DMA_TLB_MAX_SIZE (0x3f)

 /* INVALID_DESC */
 #define DMA_CCMD_INVL_GRANU_OFFSET  61
 #define DMA_ID_TLB_GLOBAL_FLUSH	(((u64)1) << 4)
 #define DMA_ID_TLB_DSI_FLUSH	(((u64)2) << 4)
 #define DMA_ID_TLB_PSI_FLUSH	(((u64)3) << 4)
 #define DMA_ID_TLB_READ_DRAIN	(((u64)1) << 7)
 #define DMA_ID_TLB_WRITE_DRAIN	(((u64)1) << 6)
 #define DMA_ID_TLB_DID(id)	(((u64)((id & 0xffff) << 16)))
 #define DMA_ID_TLB_IH_NONLEAF	(((u64)1) << 6)
 #define DMA_ID_TLB_ADDR(addr)	(addr)
 #define DMA_ID_TLB_ADDR_MASK(mask)	(mask)

 /* PMEN_REG */
 #define DMA_PMEN_EPM (((u32)1)<<31)
 #define DMA_PMEN_PRS (((u32)1)<<0)

 /* GCMD_REG */
 #define DMA_GCMD_TE (((u32)1) << 31)
 #define DMA_GCMD_SRTP (((u32)1) << 30)
 #define DMA_GCMD_SFL (((u32)1) << 29)
 #define DMA_GCMD_EAFL (((u32)1) << 28)
 #define DMA_GCMD_WBF (((u32)1) << 27)
 #define DMA_GCMD_QIE (((u32)1) << 26)
 #define DMA_GCMD_SIRTP (((u32)1) << 24)
 #define DMA_GCMD_IRE (((u32) 1) << 25)
 #define DMA_GCMD_CFI (((u32) 1) << 23)

 /* GSTS_REG */
 #define DMA_GSTS_TES (((u32)1) << 31)
 #define DMA_GSTS_RTPS (((u32)1) << 30)
 #define DMA_GSTS_FLS (((u32)1) << 29)
 #define DMA_GSTS_AFLS (((u32)1) << 28)
 #define DMA_GSTS_WBFS (((u32)1) << 27)
 #define DMA_GSTS_QIES (((u32)1) << 26)
 #define DMA_GSTS_IRTPS (((u32)1) << 24)
 #define DMA_GSTS_IRES (((u32)1) << 25)
 #define DMA_GSTS_CFIS (((u32)1) << 23)

 /* DMA_RTADDR_REG */
 #define DMA_RTADDR_RTT (((u64)1) << 11)

 /* CCMD_REG */
 #define DMA_CCMD_ICC (((u64)1) << 63)
 #define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
 #define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
 #define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
 #define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
 #define DMA_CCMD_MASK_NOBIT 0
 #define DMA_CCMD_MASK_1BIT 1
 #define DMA_CCMD_MASK_2BIT 2
 #define DMA_CCMD_MASK_3BIT 3
 #define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
 #define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))

 /* FECTL_REG */
 #define DMA_FECTL_IM (((u32)1) << 31)

 /* FSTS_REG */
 #define DMA_FSTS_PPF ((u32)2)
 #define DMA_FSTS_PFO ((u32)1)
 #define DMA_FSTS_IQE (1 << 4)
 #define DMA_FSTS_ICE (1 << 5)
 #define DMA_FSTS_ITE (1 << 6)
 #define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)

 /* FRCD_REG, 32 bits access */
 #define DMA_FRCD_F (((u32)1) << 31)
 #define dma_frcd_type(d) ((d >> 30) & 1)
 #define dma_frcd_fault_reason(c) (c & 0xff)
 #define dma_frcd_source_id(c) (c & 0xffff)
 /* low 64 bit */
 #define dma_frcd_page_addr(d) (d & (((u64)-1) << PAGE_SHIFT))

 /* PRS_REG */
 #define DMA_PRS_PPR	((u32)1)

 #define IOMMU_WAIT_OP(iommu, offset, op, cond, sts)			\
 do {									\
 	cycles_t start_time = get_cycles();				\
 	while (1) {							\
 		sts = op(iommu->reg + offset);				\
 		if (cond)						\
 			break;						\
 		if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
 			panic("DMAR hardware is malfunctioning\n");	\
 		cpu_relax();						\
 	}								\
 } while (0)

 #define QI_LENGTH	256	/* queue length */

 enum {
 	QI_FREE,
 	QI_IN_USE,
 	QI_DONE,
 	QI_ABORT
 };

 #define QI_CC_TYPE		0x1
 #define QI_IOTLB_TYPE		0x2
 #define QI_DIOTLB_TYPE		0x3
 #define QI_IEC_TYPE		0x4
 #define QI_IWD_TYPE		0x5
 #define QI_EIOTLB_TYPE		0x6
 #define QI_PC_TYPE		0x7
 #define QI_DEIOTLB_TYPE		0x8
 #define QI_PGRP_RESP_TYPE	0x9
 #define QI_PSTRM_RESP_TYPE	0xa

 #define QI_IEC_SELECTIVE	(((u64)1) << 4)
 #define QI_IEC_IIDEX(idx)	(((u64)(idx & 0xffff) << 32))
 #define QI_IEC_IM(m)		(((u64)(m & 0x1f) << 27))

 #define QI_IWD_STATUS_DATA(d)	(((u64)d) << 32)
 #define QI_IWD_STATUS_WRITE	(((u64)1) << 5)

 #define QI_IOTLB_DID(did) 	(((u64)did) << 16)
 #define QI_IOTLB_DR(dr) 	(((u64)dr) << 7)
 #define QI_IOTLB_DW(dw) 	(((u64)dw) << 6)
 #define QI_IOTLB_GRAN(gran) 	(((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
 #define QI_IOTLB_ADDR(addr)	(((u64)addr) & VTD_PAGE_MASK)
 #define QI_IOTLB_IH(ih)		(((u64)ih) << 6)
 #define QI_IOTLB_AM(am)		(((u8)am))

 #define QI_CC_FM(fm)		(((u64)fm) << 48)
 #define QI_CC_SID(sid)		(((u64)sid) << 32)
 #define QI_CC_DID(did)		(((u64)did) << 16)
 #define QI_CC_GRAN(gran)	(((u64)gran) >> (DMA_CCMD_INVL_GRANU_OFFSET-4))

 #define QI_DEV_IOTLB_SID(sid)	((u64)((sid) & 0xffff) << 32)
 #define QI_DEV_IOTLB_QDEP(qdep)	(((qdep) & 0x1f) << 16)
 #define QI_DEV_IOTLB_ADDR(addr)	((u64)(addr) & VTD_PAGE_MASK)
 #define QI_DEV_IOTLB_SIZE	1
 #define QI_DEV_IOTLB_MAX_INVS	32

 #define QI_PC_PASID(pasid)	(((u64)pasid) << 32)
 #define QI_PC_DID(did)		(((u64)did) << 16)
 #define QI_PC_GRAN(gran)	(((u64)gran) << 4)

 #define QI_PC_ALL_PASIDS	(QI_PC_TYPE | QI_PC_GRAN(0))
 #define QI_PC_PASID_SEL		(QI_PC_TYPE | QI_PC_GRAN(1))

 #define QI_EIOTLB_ADDR(addr)	((u64)(addr) & VTD_PAGE_MASK)
 #define QI_EIOTLB_GL(gl)	(((u64)gl) << 7)
 #define QI_EIOTLB_IH(ih)	(((u64)ih) << 6)
 #define QI_EIOTLB_AM(am)	(((u64)am))
 #define QI_EIOTLB_PASID(pasid) 	(((u64)pasid) << 32)
 #define QI_EIOTLB_DID(did)	(((u64)did) << 16)
 #define QI_EIOTLB_GRAN(gran) 	(((u64)gran) << 4)

 #define QI_DEV_EIOTLB_ADDR(a)	((u64)(a) & VTD_PAGE_MASK)
 #define QI_DEV_EIOTLB_SIZE	(((u64)1) << 11)
 #define QI_DEV_EIOTLB_GLOB(g)	((u64)g)
 #define QI_DEV_EIOTLB_PASID(p)	(((u64)p) << 32)
 #define QI_DEV_EIOTLB_SID(sid)	((u64)((sid) & 0xffff) << 16)
 #define QI_DEV_EIOTLB_QDEP(qd)	((u64)((qd) & 0x1f) << 4)
 #define QI_DEV_EIOTLB_MAX_INVS	32

 #define QI_PGRP_IDX(idx)	(((u64)(idx)) << 55)
 #define QI_PGRP_PRIV(priv)	(((u64)(priv)) << 32)
 #define QI_PGRP_RESP_CODE(res)	((u64)(res))
 #define QI_PGRP_PASID(pasid)	(((u64)(pasid)) << 32)
 #define QI_PGRP_DID(did)	(((u64)(did)) << 16)
 #define QI_PGRP_PASID_P(p)	(((u64)(p)) << 4)

 #define QI_PSTRM_ADDR(addr)	(((u64)(addr)) & VTD_PAGE_MASK)
 #define QI_PSTRM_DEVFN(devfn)	(((u64)(devfn)) << 4)
 #define QI_PSTRM_RESP_CODE(res)	((u64)(res))
 #define QI_PSTRM_IDX(idx)	(((u64)(idx)) << 55)
 #define QI_PSTRM_PRIV(priv)	(((u64)(priv)) << 32)
 #define QI_PSTRM_BUS(bus)	(((u64)(bus)) << 24)
 #define QI_PSTRM_PASID(pasid)	(((u64)(pasid)) << 4)

 #define QI_RESP_SUCCESS		0x0
 #define QI_RESP_INVALID		0x1
 #define QI_RESP_FAILURE		0xf

 #define QI_GRAN_ALL_ALL			0
 #define QI_GRAN_NONG_ALL		1
 #define QI_GRAN_NONG_PASID		2
 #define QI_GRAN_PSI_PASID		3

 struct qi_desc {
 	u64 low, high;
 };

 struct q_inval {
 	raw_spinlock_t  q_lock;
 	struct qi_desc  *desc;          /* invalidation queue */
 	int             *desc_status;   /* desc status */
 	int             free_head;      /* first free entry */
 	int             free_tail;      /* last free entry */
 	int             free_cnt;
 };

 #ifdef CONFIG_IRQ_REMAP
 /* 1MB - maximum possible interrupt remapping table size */
 #define INTR_REMAP_PAGE_ORDER	8
 #define INTR_REMAP_TABLE_REG_SIZE	0xf
 #define INTR_REMAP_TABLE_REG_SIZE_MASK  0xf

 #define INTR_REMAP_TABLE_ENTRIES	65536

 struct irq_domain;

 struct ir_table {
 	struct irte *base;
 	unsigned long *bitmap;
 };
 #endif

 struct iommu_flush {
 	void (*flush_context)(struct intel_iommu *iommu, u16 did, u16 sid,
 			      u8 fm, u64 type);
 	void (*flush_iotlb)(struct intel_iommu *iommu, u16 did, u64 addr,
 			    unsigned int size_order, u64 type);
 };

 enum {
 	SR_DMAR_FECTL_REG,
 	SR_DMAR_FEDATA_REG,
 	SR_DMAR_FEADDR_REG,
 	SR_DMAR_FEUADDR_REG,
 	MAX_SR_DMAR_REGS
 };

 #define VTD_FLAG_TRANS_PRE_ENABLED	(1 << 0)
 #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED	(1 << 1)

 struct pasid_entry;
 struct pasid_state_entry;
 struct page_req_dsc;

 struct intel_iommu {
 	void __iomem	*reg; /* Pointer to hardware regs, virtual addr */
 	u64 		reg_phys; /* physical address of hw register set */
 	u64		reg_size; /* size of hw register set */
 	u64		cap;
 	u64		ecap;
 	u32		gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
 	raw_spinlock_t	register_lock; /* protect register handling */
 	int		seq_id;	/* sequence id of the iommu */
 	int		agaw; /* agaw of this iommu */
 	int		msagaw; /* max sagaw of this iommu */
 	unsigned int 	irq, pr_irq;
 	u16		segment;     /* PCI segment# */
 	unsigned char 	name[13];    /* Device Name */

 #ifdef CONFIG_INTEL_IOMMU
 	unsigned long 	*domain_ids; /* bitmap of domains */
 	struct dmar_domain ***domains; /* ptr to domains */
 	spinlock_t	lock; /* protect context, domain ids */
 	struct root_entry *root_entry; /* virtual address */

 	struct iommu_flush flush;
 #endif
 #ifdef CONFIG_INTEL_IOMMU_SVM
 	/* These are large and need to be contiguous, so we allocate just
 	 * one for now. We'll maybe want to rethink that if we truly give
 	 * devices away to userspace processes (e.g. for DPDK) and don't
 	 * want to trust that userspace will use *only* the PASID it was
 	 * told to. But while it's all driver-arbitrated, we're fine. */
 	struct pasid_entry *pasid_table;
 	struct pasid_state_entry *pasid_state_table;
 	struct page_req_dsc *prq;
 	unsigned char prq_name[16];    /* Name for PRQ interrupt */
 	struct idr pasid_idr;
 	u32 pasid_max;
 #endif
 	struct q_inval  *qi;            /* Queued invalidation info */
 	u32 *iommu_state; /* Store iommu states between suspend and resume.*/

 #ifdef CONFIG_IRQ_REMAP
 	struct ir_table *ir_table;	/* Interrupt remapping info */
 	struct irq_domain *ir_domain;
 	struct irq_domain *ir_msi_domain;
 #endif
 	struct iommu_device iommu;  /* IOMMU core code handle */
 	int		node;
 	u32		flags;      /* Software defined flags */
 };

 static inline void __iommu_flush_cache(
 	struct intel_iommu *iommu, void *addr, int size)
 {
 	if (!ecap_coherent(iommu->ecap))
 		clflush_cache_range(addr, size);
 }

 extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
 extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);

 extern int dmar_enable_qi(struct intel_iommu *iommu);
 extern void dmar_disable_qi(struct intel_iommu *iommu);
 extern int dmar_reenable_qi(struct intel_iommu *iommu);
 extern void qi_global_iec(struct intel_iommu *iommu);

 extern void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
 			     u8 fm, u64 type);
 extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
 			  unsigned int size_order, u64 type);
 extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
 			       u64 addr, unsigned mask);

 extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);

 extern int dmar_ir_support(void);

 #ifdef CONFIG_INTEL_IOMMU_SVM
 extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu);
 extern int intel_svm_free_pasid_tables(struct intel_iommu *iommu);
 extern int intel_svm_enable_prq(struct intel_iommu *iommu);
 extern int intel_svm_finish_prq(struct intel_iommu *iommu);

 struct svm_dev_ops;

 struct intel_svm_dev {
 	struct list_head list;
 	struct rcu_head rcu;
 	struct device *dev;
 	struct svm_dev_ops *ops;
 	int users;
 	u16 did;
 	u16 dev_iotlb:1;
 	u16 sid, qdep;
 };

 struct intel_svm {
 	struct mmu_notifier notifier;
 	struct mm_struct *mm;
 	struct intel_iommu *iommu;
 	int flags;
 	int pasid;
 	struct list_head devs;
 };

 extern int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev);
 extern struct intel_iommu *intel_svm_device_to_iommu(struct device *dev);
 #endif

 extern const struct attribute_group *intel_iommu_groups[];

 #endif
	/*
	* Copyright © 2006-2015, Intel Corporation.
	*
	* Authors: Ashok Raj <ashok.raj@intel.com>
	* Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
	* David Woodhouse <David.Woodhouse@intel.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms and conditions of the GNU General Public License,
	* version 2, as published by the Free Software Foundation.
	*
	* This program is distributed in the hope it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	* Place - Suite 330, Boston, MA 02111-1307 USA.
	*/

	#ifndef _INTEL_IOMMU_H_
	#define _INTEL_IOMMU_H_

	#include <linux/types.h>
	#include <linux/iova.h>
	#include <linux/io.h>
	#include <linux/idr.h>
	#include <linux/dma_remapping.h>
	#include <linux/mmu_notifier.h>
	#include <linux/list.h>
	#include <linux/iommu.h>
	#include <asm/cacheflush.h>
	#include <asm/iommu.h>

	/*
	* Intel IOMMU register specification per version 1.0 public spec.
	*/

	#define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
	#define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
	#define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
	#define DMAR_GCMD_REG 0x18 /* Global command register */
	#define DMAR_GSTS_REG 0x1c /* Global status register */
	#define DMAR_RTADDR_REG 0x20 /* Root entry table */
	#define DMAR_CCMD_REG 0x28 /* Context command reg */
	#define DMAR_FSTS_REG 0x34 /* Fault Status register */
	#define DMAR_FECTL_REG 0x38 /* Fault control register */
	#define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */
	#define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */
	#define DMAR_FEUADDR_REG 0x44 /* Upper address register */
	#define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */
	#define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */
	#define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */
	#define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */
	#define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */
	#define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */
	#define DMAR_IQH_REG 0x80 /* Invalidation queue head register */
	#define DMAR_IQT_REG 0x88 /* Invalidation queue tail register */
	#define DMAR_IQ_SHIFT 4 /* Invalidation queue head/tail shift */
	#define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */
	#define DMAR_ICS_REG 0x9c /* Invalidation complete status register */
	#define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */
	#define DMAR_PQH_REG 0xc0 /* Page request queue head register */
	#define DMAR_PQT_REG 0xc8 /* Page request queue tail register */
	#define DMAR_PQA_REG 0xd0 /* Page request queue address register */
	#define DMAR_PRS_REG 0xdc /* Page request status register */
	#define DMAR_PECTL_REG 0xe0 /* Page request event control register */
	#define DMAR_PEDATA_REG 0xe4 /* Page request event interrupt data register */
	#define DMAR_PEADDR_REG 0xe8 /* Page request event interrupt addr register */
	#define DMAR_PEUADDR_REG 0xec /* Page request event Upper address register */

	#define OFFSET_STRIDE (9)

	#ifdef CONFIG_64BIT
	#define dmar_readq(a) readq(a)
	#define dmar_writeq(a,v) writeq(v,a)
	#else
	static inline u64 dmar_readq(void __iomem *addr)
	{
	u32 lo, hi;
	lo = readl(addr);
	hi = readl(addr + 4);
	return (((u64) hi) << 32) + lo;
	}

	static inline void dmar_writeq(void __iomem *addr, u64 val)
	{
	writel((u32)val, addr);
	writel((u32)(val >> 32), addr + 4);
	}
	#endif

	#define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
	#define DMAR_VER_MINOR(v) ((v) & 0x0f)

	/*
	* Decoding Capability Register
	*/
	#define cap_pi_support(c) (((c) >> 59) & 1)
	#define cap_read_drain(c) (((c) >> 55) & 1)
	#define cap_write_drain(c) (((c) >> 54) & 1)
	#define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
	#define cap_num_fault_regs(c) ((((c) >> 40) & 0xff) + 1)
	#define cap_pgsel_inv(c) (((c) >> 39) & 1)

	#define cap_super_page_val(c) (((c) >> 34) & 0xf)
	#define cap_super_offset(c) (((find_first_bit(&cap_super_page_val(c), 4)) \
	* OFFSET_STRIDE) + 21)

	#define cap_fault_reg_offset(c) ((((c) >> 24) & 0x3ff) * 16)
	#define cap_max_fault_reg_offset(c) \
	(cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)

	#define cap_zlr(c) (((c) >> 22) & 1)
	#define cap_isoch(c) (((c) >> 23) & 1)
	#define cap_mgaw(c) ((((c) >> 16) & 0x3f) + 1)
	#define cap_sagaw(c) (((c) >> 8) & 0x1f)
	#define cap_caching_mode(c) (((c) >> 7) & 1)
	#define cap_phmr(c) (((c) >> 6) & 1)
	#define cap_plmr(c) (((c) >> 5) & 1)
	#define cap_rwbf(c) (((c) >> 4) & 1)
	#define cap_afl(c) (((c) >> 3) & 1)
	#define cap_ndoms(c) (((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
	/*
	* Extended Capability Register
	*/

	#define ecap_pasid(e) ((e >> 40) & 0x1)
	#define ecap_pss(e) ((e >> 35) & 0x1f)
	#define ecap_eafs(e) ((e >> 34) & 0x1)
	#define ecap_nwfs(e) ((e >> 33) & 0x1)
	#define ecap_srs(e) ((e >> 31) & 0x1)
	#define ecap_ers(e) ((e >> 30) & 0x1)
	#define ecap_prs(e) ((e >> 29) & 0x1)
	#define ecap_broken_pasid(e) ((e >> 28) & 0x1)
	#define ecap_dis(e) ((e >> 27) & 0x1)
	#define ecap_nest(e) ((e >> 26) & 0x1)
	#define ecap_mts(e) ((e >> 25) & 0x1)
	#define ecap_ecs(e) ((e >> 24) & 0x1)
	#define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
	#define ecap_max_iotlb_offset(e) (ecap_iotlb_offset(e) + 16)
	#define ecap_coherent(e) ((e) & 0x1)
	#define ecap_qis(e) ((e) & 0x2)
	#define ecap_pass_through(e) ((e >> 6) & 0x1)
	#define ecap_eim_support(e) ((e >> 4) & 0x1)
	#define ecap_ir_support(e) ((e >> 3) & 0x1)
	#define ecap_dev_iotlb_support(e) (((e) >> 2) & 0x1)
	#define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
	#define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */

	/* IOTLB_REG */
	#define DMA_TLB_FLUSH_GRANU_OFFSET 60
	#define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
	#define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
	#define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
	#define DMA_TLB_IIRG(type) ((type >> 60) & 3)
	#define DMA_TLB_IAIG(val) (((val) >> 57) & 3)
	#define DMA_TLB_READ_DRAIN (((u64)1) << 49)
	#define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
	#define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32)
	#define DMA_TLB_IVT (((u64)1) << 63)
	#define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
	#define DMA_TLB_MAX_SIZE (0x3f)

	/* INVALID_DESC */
	#define DMA_CCMD_INVL_GRANU_OFFSET 61
	#define DMA_ID_TLB_GLOBAL_FLUSH (((u64)1) << 4)
	#define DMA_ID_TLB_DSI_FLUSH (((u64)2) << 4)
	#define DMA_ID_TLB_PSI_FLUSH (((u64)3) << 4)
	#define DMA_ID_TLB_READ_DRAIN (((u64)1) << 7)
	#define DMA_ID_TLB_WRITE_DRAIN (((u64)1) << 6)
	#define DMA_ID_TLB_DID(id) (((u64)((id & 0xffff) << 16)))
	#define DMA_ID_TLB_IH_NONLEAF (((u64)1) << 6)
	#define DMA_ID_TLB_ADDR(addr) (addr)
	#define DMA_ID_TLB_ADDR_MASK(mask) (mask)

	/* PMEN_REG */
	#define DMA_PMEN_EPM (((u32)1)<<31)
	#define DMA_PMEN_PRS (((u32)1)<<0)

	/* GCMD_REG */
	#define DMA_GCMD_TE (((u32)1) << 31)
	#define DMA_GCMD_SRTP (((u32)1) << 30)
	#define DMA_GCMD_SFL (((u32)1) << 29)
	#define DMA_GCMD_EAFL (((u32)1) << 28)
	#define DMA_GCMD_WBF (((u32)1) << 27)
	#define DMA_GCMD_QIE (((u32)1) << 26)
	#define DMA_GCMD_SIRTP (((u32)1) << 24)
	#define DMA_GCMD_IRE (((u32) 1) << 25)
	#define DMA_GCMD_CFI (((u32) 1) << 23)

	/* GSTS_REG */
	#define DMA_GSTS_TES (((u32)1) << 31)
	#define DMA_GSTS_RTPS (((u32)1) << 30)
	#define DMA_GSTS_FLS (((u32)1) << 29)
	#define DMA_GSTS_AFLS (((u32)1) << 28)
	#define DMA_GSTS_WBFS (((u32)1) << 27)
	#define DMA_GSTS_QIES (((u32)1) << 26)
	#define DMA_GSTS_IRTPS (((u32)1) << 24)
	#define DMA_GSTS_IRES (((u32)1) << 25)
	#define DMA_GSTS_CFIS (((u32)1) << 23)

	/* DMA_RTADDR_REG */
	#define DMA_RTADDR_RTT (((u64)1) << 11)

	/* CCMD_REG */
	#define DMA_CCMD_ICC (((u64)1) << 63)
	#define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
	#define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
	#define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
	#define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
	#define DMA_CCMD_MASK_NOBIT 0
	#define DMA_CCMD_MASK_1BIT 1
	#define DMA_CCMD_MASK_2BIT 2
	#define DMA_CCMD_MASK_3BIT 3
	#define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
	#define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))

	/* FECTL_REG */
	#define DMA_FECTL_IM (((u32)1) << 31)

	/* FSTS_REG */
	#define DMA_FSTS_PPF ((u32)2)
	#define DMA_FSTS_PFO ((u32)1)
	#define DMA_FSTS_IQE (1 << 4)
	#define DMA_FSTS_ICE (1 << 5)
	#define DMA_FSTS_ITE (1 << 6)
	#define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)

	/* FRCD_REG, 32 bits access */
	#define DMA_FRCD_F (((u32)1) << 31)
	#define dma_frcd_type(d) ((d >> 30) & 1)
	#define dma_frcd_fault_reason(c) (c & 0xff)
	#define dma_frcd_source_id(c) (c & 0xffff)
	/* low 64 bit */
	#define dma_frcd_page_addr(d) (d & (((u64)-1) << PAGE_SHIFT))

	/* PRS_REG */
	#define DMA_PRS_PPR ((u32)1)

	#define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
	do { \
	cycles_t start_time = get_cycles(); \
	while (1) { \
	sts = op(iommu->reg + offset); \
	if (cond) \
	break; \
	if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
	panic("DMAR hardware is malfunctioning\n"); \
	cpu_relax(); \
	} \
	} while (0)

	#define QI_LENGTH 256 /* queue length */

	enum {
	QI_FREE,
	QI_IN_USE,
	QI_DONE,
	QI_ABORT
	};

	#define QI_CC_TYPE 0x1
	#define QI_IOTLB_TYPE 0x2
	#define QI_DIOTLB_TYPE 0x3
	#define QI_IEC_TYPE 0x4
	#define QI_IWD_TYPE 0x5
	#define QI_EIOTLB_TYPE 0x6
	#define QI_PC_TYPE 0x7
	#define QI_DEIOTLB_TYPE 0x8
	#define QI_PGRP_RESP_TYPE 0x9
	#define QI_PSTRM_RESP_TYPE 0xa

	#define QI_IEC_SELECTIVE (((u64)1) << 4)
	#define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32))
	#define QI_IEC_IM(m) (((u64)(m & 0x1f) << 27))

	#define QI_IWD_STATUS_DATA(d) (((u64)d) << 32)
	#define QI_IWD_STATUS_WRITE (((u64)1) << 5)

	#define QI_IOTLB_DID(did) (((u64)did) << 16)
	#define QI_IOTLB_DR(dr) (((u64)dr) << 7)
	#define QI_IOTLB_DW(dw) (((u64)dw) << 6)
	#define QI_IOTLB_GRAN(gran) (((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
	#define QI_IOTLB_ADDR(addr) (((u64)addr) & VTD_PAGE_MASK)
	#define QI_IOTLB_IH(ih) (((u64)ih) << 6)
	#define QI_IOTLB_AM(am) (((u8)am))

	#define QI_CC_FM(fm) (((u64)fm) << 48)
	#define QI_CC_SID(sid) (((u64)sid) << 32)
	#define QI_CC_DID(did) (((u64)did) << 16)
	#define QI_CC_GRAN(gran) (((u64)gran) >> (DMA_CCMD_INVL_GRANU_OFFSET-4))

	#define QI_DEV_IOTLB_SID(sid) ((u64)((sid) & 0xffff) << 32)
	#define QI_DEV_IOTLB_QDEP(qdep) (((qdep) & 0x1f) << 16)
	#define QI_DEV_IOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
	#define QI_DEV_IOTLB_SIZE 1
	#define QI_DEV_IOTLB_MAX_INVS 32

	#define QI_PC_PASID(pasid) (((u64)pasid) << 32)
	#define QI_PC_DID(did) (((u64)did) << 16)
	#define QI_PC_GRAN(gran) (((u64)gran) << 4)

	#define QI_PC_ALL_PASIDS (QI_PC_TYPE \| QI_PC_GRAN(0))
	#define QI_PC_PASID_SEL (QI_PC_TYPE \| QI_PC_GRAN(1))

	#define QI_EIOTLB_ADDR(addr) ((u64)(addr) & VTD_PAGE_MASK)
	#define QI_EIOTLB_GL(gl) (((u64)gl) << 7)
	#define QI_EIOTLB_IH(ih) (((u64)ih) << 6)
	#define QI_EIOTLB_AM(am) (((u64)am))
	#define QI_EIOTLB_PASID(pasid) (((u64)pasid) << 32)
	#define QI_EIOTLB_DID(did) (((u64)did) << 16)
	#define QI_EIOTLB_GRAN(gran) (((u64)gran) << 4)

	#define QI_DEV_EIOTLB_ADDR(a) ((u64)(a) & VTD_PAGE_MASK)
	#define QI_DEV_EIOTLB_SIZE (((u64)1) << 11)
	#define QI_DEV_EIOTLB_GLOB(g) ((u64)g)
	#define QI_DEV_EIOTLB_PASID(p) (((u64)p) << 32)
	#define QI_DEV_EIOTLB_SID(sid) ((u64)((sid) & 0xffff) << 16)
	#define QI_DEV_EIOTLB_QDEP(qd) ((u64)((qd) & 0x1f) << 4)
	#define QI_DEV_EIOTLB_MAX_INVS 32

	#define QI_PGRP_IDX(idx) (((u64)(idx)) << 55)
	#define QI_PGRP_PRIV(priv) (((u64)(priv)) << 32)
	#define QI_PGRP_RESP_CODE(res) ((u64)(res))
	#define QI_PGRP_PASID(pasid) (((u64)(pasid)) << 32)
	#define QI_PGRP_DID(did) (((u64)(did)) << 16)
	#define QI_PGRP_PASID_P(p) (((u64)(p)) << 4)

	#define QI_PSTRM_ADDR(addr) (((u64)(addr)) & VTD_PAGE_MASK)
	#define QI_PSTRM_DEVFN(devfn) (((u64)(devfn)) << 4)
	#define QI_PSTRM_RESP_CODE(res) ((u64)(res))
	#define QI_PSTRM_IDX(idx) (((u64)(idx)) << 55)
	#define QI_PSTRM_PRIV(priv) (((u64)(priv)) << 32)
	#define QI_PSTRM_BUS(bus) (((u64)(bus)) << 24)
	#define QI_PSTRM_PASID(pasid) (((u64)(pasid)) << 4)

	#define QI_RESP_SUCCESS 0x0
	#define QI_RESP_INVALID 0x1
	#define QI_RESP_FAILURE 0xf

	#define QI_GRAN_ALL_ALL 0
	#define QI_GRAN_NONG_ALL 1
	#define QI_GRAN_NONG_PASID 2
	#define QI_GRAN_PSI_PASID 3

	struct qi_desc {
	u64 low, high;
	};

	struct q_inval {
	raw_spinlock_t q_lock;
	struct qi_desc desc; / invalidation queue */
	int desc_status; / desc status */
	int free_head; /* first free entry */
	int free_tail; /* last free entry */
	int free_cnt;
	};

	#ifdef CONFIG_IRQ_REMAP
	/* 1MB - maximum possible interrupt remapping table size */
	#define INTR_REMAP_PAGE_ORDER 8
	#define INTR_REMAP_TABLE_REG_SIZE 0xf
	#define INTR_REMAP_TABLE_REG_SIZE_MASK 0xf

	#define INTR_REMAP_TABLE_ENTRIES 65536

	struct irq_domain;

	struct ir_table {
	struct irte *base;
	unsigned long *bitmap;
	};
	#endif

	struct iommu_flush {
	void (flush_context)(struct intel_iommu iommu, u16 did, u16 sid,
	u8 fm, u64 type);
	void (flush_iotlb)(struct intel_iommu iommu, u16 did, u64 addr,
	unsigned int size_order, u64 type);
	};

	enum {
	SR_DMAR_FECTL_REG,
	SR_DMAR_FEDATA_REG,
	SR_DMAR_FEADDR_REG,
	SR_DMAR_FEUADDR_REG,
	MAX_SR_DMAR_REGS
	};

	#define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0)
	#define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1)

	struct pasid_entry;
	struct pasid_state_entry;
	struct page_req_dsc;

	struct intel_iommu {
	void __iomem reg; / Pointer to hardware regs, virtual addr */
	u64 reg_phys; /* physical address of hw register set */
	u64 reg_size; /* size of hw register set */
	u64 cap;
	u64 ecap;
	u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
	raw_spinlock_t register_lock; /* protect register handling */
	int seq_id; /* sequence id of the iommu */
	int agaw; /* agaw of this iommu */
	int msagaw; /* max sagaw of this iommu */
	unsigned int irq, pr_irq;
	u16 segment; /* PCI segment# */
	unsigned char name[13]; /* Device Name */

	#ifdef CONFIG_INTEL_IOMMU
	unsigned long domain_ids; / bitmap of domains */
	struct dmar_domain **domains; / ptr to domains */
	spinlock_t lock; /* protect context, domain ids */
	struct root_entry root_entry; / virtual address */

	struct iommu_flush flush;
	#endif
	#ifdef CONFIG_INTEL_IOMMU_SVM
	/* These are large and need to be contiguous, so we allocate just
	* one for now. We'll maybe want to rethink that if we truly give
	* devices away to userspace processes (e.g. for DPDK) and don't
	* want to trust that userspace will use only the PASID it was
	* told to. But while it's all driver-arbitrated, we're fine. */
	struct pasid_entry *pasid_table;
	struct pasid_state_entry *pasid_state_table;
	struct page_req_dsc *prq;
	unsigned char prq_name[16]; /* Name for PRQ interrupt */
	struct idr pasid_idr;
	u32 pasid_max;
	#endif
	struct q_inval qi; / Queued invalidation info */
	u32 iommu_state; / Store iommu states between suspend and resume.*/

	#ifdef CONFIG_IRQ_REMAP
	struct ir_table ir_table; / Interrupt remapping info */
	struct irq_domain *ir_domain;
	struct irq_domain *ir_msi_domain;
	#endif
	struct iommu_device iommu; /* IOMMU core code handle */
	int node;
	u32 flags; /* Software defined flags */
	};

	static inline void __iommu_flush_cache(
	struct intel_iommu iommu, void addr, int size)
	{
	if (!ecap_coherent(iommu->ecap))
	clflush_cache_range(addr, size);
	}

	extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
	extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);

	extern int dmar_enable_qi(struct intel_iommu *iommu);
	extern void dmar_disable_qi(struct intel_iommu *iommu);
	extern int dmar_reenable_qi(struct intel_iommu *iommu);
	extern void qi_global_iec(struct intel_iommu *iommu);

	extern void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
	u8 fm, u64 type);
	extern void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
	unsigned int size_order, u64 type);
	extern void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 qdep,
	u64 addr, unsigned mask);

	extern int qi_submit_sync(struct qi_desc desc, struct intel_iommu iommu);

	extern int dmar_ir_support(void);

	#ifdef CONFIG_INTEL_IOMMU_SVM
	extern int intel_svm_alloc_pasid_tables(struct intel_iommu *iommu);
	extern int intel_svm_free_pasid_tables(struct intel_iommu *iommu);
	extern int intel_svm_enable_prq(struct intel_iommu *iommu);
	extern int intel_svm_finish_prq(struct intel_iommu *iommu);

	struct svm_dev_ops;

	struct intel_svm_dev {
	struct list_head list;
	struct rcu_head rcu;
	struct device *dev;
	struct svm_dev_ops *ops;
	int users;
	u16 did;
	u16 dev_iotlb:1;
	u16 sid, qdep;
	};

	struct intel_svm {
	struct mmu_notifier notifier;
	struct mm_struct *mm;
	struct intel_iommu *iommu;
	int flags;
	int pasid;
	struct list_head devs;
	};

	extern int intel_iommu_enable_pasid(struct intel_iommu iommu, struct intel_svm_dev sdev);
	extern struct intel_iommu intel_svm_device_to_iommu(struct device dev);
	#endif

	extern const struct attribute_group *intel_iommu_groups[];

	#endif