122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* pasid.h - PASID idr, table and entry header
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*
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* Copyright (C) 2018 Intel Corporation
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*
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* Author: Lu Baolu <baolu.lu@linux.intel.com>
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*/
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#ifndef __INTEL_PASID_H
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#define __INTEL_PASID_H
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#define PASID_RID2PASID 0x0
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#define PASID_MIN 0x1
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#define PASID_MAX 0x100000
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#define PASID_PTE_MASK 0x3F
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#define PASID_PTE_PRESENT 1
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#define PASID_PTE_FPD 2
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#define PDE_PFN_MASK PAGE_MASK
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#define PASID_PDE_SHIFT 6
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#define MAX_NR_PASID_BITS 20
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#define PASID_TBL_ENTRIES BIT(PASID_PDE_SHIFT)
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#define is_pasid_enabled(entry) (((entry)->lo >> 3) & 0x1)
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#define get_pasid_dir_size(entry) (1 << ((((entry)->lo >> 9) & 0x7) + 7))
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/* Virtual command interface for enlightened pasid management. */
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#define VCMD_CMD_ALLOC 0x1
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#define VCMD_CMD_FREE 0x2
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#define VCMD_VRSP_IP 0x1
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#define VCMD_VRSP_SC(e) (((e) & 0xff) >> 1)
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#define VCMD_VRSP_SC_SUCCESS 0
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#define VCMD_VRSP_SC_NO_PASID_AVAIL 16
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#define VCMD_VRSP_SC_INVALID_PASID 16
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#define VCMD_VRSP_RESULT_PASID(e) (((e) >> 16) & 0xfffff)
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#define VCMD_CMD_OPERAND(e) ((e) << 16)
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/*
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* Domain ID reserved for pasid entries programmed for first-level
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* only and pass-through transfer modes.
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*/
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#define FLPT_DEFAULT_DID 1
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#define NUM_RESERVED_DID 2
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#define PASID_FLAG_NESTED BIT(1)
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#define PASID_FLAG_PAGE_SNOOP BIT(2)
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/*
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* The PASID_FLAG_FL5LP flag Indicates using 5-level paging for first-
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* level translation, otherwise, 4-level paging will be used.
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*/
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#define PASID_FLAG_FL5LP BIT(1)
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struct pasid_dir_entry {
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u64 val;
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};
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struct pasid_entry {
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u64 val[8];
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};
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#define PASID_ENTRY_PGTT_FL_ONLY (1)
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#define PASID_ENTRY_PGTT_SL_ONLY (2)
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#define PASID_ENTRY_PGTT_NESTED (3)
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#define PASID_ENTRY_PGTT_PT (4)
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/* The representative of a PASID table */
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struct pasid_table {
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void *table; /* pasid table pointer */
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int order; /* page order of pasid table */
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u32 max_pasid; /* max pasid */
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};
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/* Get PRESENT bit of a PASID directory entry. */
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static inline bool pasid_pde_is_present(struct pasid_dir_entry *pde)
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{
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return READ_ONCE(pde->val) & PASID_PTE_PRESENT;
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}
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/* Get PASID table from a PASID directory entry. */
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static inline struct pasid_entry *
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get_pasid_table_from_pde(struct pasid_dir_entry *pde)
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{
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if (!pasid_pde_is_present(pde))
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return NULL;
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return phys_to_virt(READ_ONCE(pde->val) & PDE_PFN_MASK);
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}
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/* Get PRESENT bit of a PASID table entry. */
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static inline bool pasid_pte_is_present(struct pasid_entry *pte)
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{
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return READ_ONCE(pte->val[0]) & PASID_PTE_PRESENT;
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}
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/* Get PGTT field of a PASID table entry */
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static inline u16 pasid_pte_get_pgtt(struct pasid_entry *pte)
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{
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return (u16)((READ_ONCE(pte->val[0]) >> 6) & 0x7);
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}
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extern unsigned int intel_pasid_max_id;
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int intel_pasid_alloc_table(struct device *dev);
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void intel_pasid_free_table(struct device *dev);
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struct pasid_table *intel_pasid_get_table(struct device *dev);
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int intel_pasid_setup_first_level(struct intel_iommu *iommu,
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struct device *dev, pgd_t *pgd,
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u32 pasid, u16 did, int flags);
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int intel_pasid_setup_second_level(struct intel_iommu *iommu,
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struct dmar_domain *domain,
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struct device *dev, u32 pasid);
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int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
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struct dmar_domain *domain,
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struct device *dev, u32 pasid);
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void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
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struct device *dev, u32 pasid,
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bool fault_ignore);
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int vcmd_alloc_pasid(struct intel_iommu *iommu, u32 *pasid);
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void vcmd_free_pasid(struct intel_iommu *iommu, u32 pasid);
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void intel_pasid_setup_page_snoop_control(struct intel_iommu *iommu,
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struct device *dev, u32 pasid);
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#endif /* __INTEL_PASID_H */
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