125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* pasid.h - PASID idr, table and entry header
|
|
*
|
|
* Copyright (C) 2018 Intel Corporation
|
|
*
|
|
* Author: Lu Baolu <baolu.lu@linux.intel.com>
|
|
*/
|
|
|
|
#ifndef __INTEL_PASID_H
|
|
#define __INTEL_PASID_H
|
|
|
|
#define PASID_RID2PASID 0x0
|
|
#define PASID_MIN 0x1
|
|
#define PASID_MAX 0x100000
|
|
#define PASID_PTE_MASK 0x3F
|
|
#define PASID_PTE_PRESENT 1
|
|
#define PASID_PTE_FPD 2
|
|
#define PDE_PFN_MASK PAGE_MASK
|
|
#define PASID_PDE_SHIFT 6
|
|
#define MAX_NR_PASID_BITS 20
|
|
#define PASID_TBL_ENTRIES BIT(PASID_PDE_SHIFT)
|
|
|
|
#define is_pasid_enabled(entry) (((entry)->lo >> 3) & 0x1)
|
|
#define get_pasid_dir_size(entry) (1 << ((((entry)->lo >> 9) & 0x7) + 7))
|
|
|
|
/* Virtual command interface for enlightened pasid management. */
|
|
#define VCMD_CMD_ALLOC 0x1
|
|
#define VCMD_CMD_FREE 0x2
|
|
#define VCMD_VRSP_IP 0x1
|
|
#define VCMD_VRSP_SC(e) (((e) >> 1) & 0x3)
|
|
#define VCMD_VRSP_SC_SUCCESS 0
|
|
#define VCMD_VRSP_SC_NO_PASID_AVAIL 2
|
|
#define VCMD_VRSP_SC_INVALID_PASID 2
|
|
#define VCMD_VRSP_RESULT_PASID(e) (((e) >> 8) & 0xfffff)
|
|
#define VCMD_CMD_OPERAND(e) ((e) << 8)
|
|
/*
|
|
* Domain ID reserved for pasid entries programmed for first-level
|
|
* only and pass-through transfer modes.
|
|
*/
|
|
#define FLPT_DEFAULT_DID 1
|
|
|
|
/*
|
|
* The SUPERVISOR_MODE flag indicates a first level translation which
|
|
* can be used for access to kernel addresses. It is valid only for
|
|
* access to the kernel's static 1:1 mapping of physical memory — not
|
|
* to vmalloc or even module mappings.
|
|
*/
|
|
#define PASID_FLAG_SUPERVISOR_MODE BIT(0)
|
|
#define PASID_FLAG_NESTED BIT(1)
|
|
#define PASID_FLAG_PAGE_SNOOP BIT(2)
|
|
|
|
/*
|
|
* The PASID_FLAG_FL5LP flag Indicates using 5-level paging for first-
|
|
* level translation, otherwise, 4-level paging will be used.
|
|
*/
|
|
#define PASID_FLAG_FL5LP BIT(1)
|
|
|
|
struct pasid_dir_entry {
|
|
u64 val;
|
|
};
|
|
|
|
struct pasid_entry {
|
|
u64 val[8];
|
|
};
|
|
|
|
#define PASID_ENTRY_PGTT_FL_ONLY (1)
|
|
#define PASID_ENTRY_PGTT_SL_ONLY (2)
|
|
#define PASID_ENTRY_PGTT_NESTED (3)
|
|
#define PASID_ENTRY_PGTT_PT (4)
|
|
|
|
/* The representative of a PASID table */
|
|
struct pasid_table {
|
|
void *table; /* pasid table pointer */
|
|
int order; /* page order of pasid table */
|
|
u32 max_pasid; /* max pasid */
|
|
struct list_head dev; /* device list */
|
|
};
|
|
|
|
/* Get PRESENT bit of a PASID directory entry. */
|
|
static inline bool pasid_pde_is_present(struct pasid_dir_entry *pde)
|
|
{
|
|
return READ_ONCE(pde->val) & PASID_PTE_PRESENT;
|
|
}
|
|
|
|
/* Get PASID table from a PASID directory entry. */
|
|
static inline struct pasid_entry *
|
|
get_pasid_table_from_pde(struct pasid_dir_entry *pde)
|
|
{
|
|
if (!pasid_pde_is_present(pde))
|
|
return NULL;
|
|
|
|
return phys_to_virt(READ_ONCE(pde->val) & PDE_PFN_MASK);
|
|
}
|
|
|
|
/* Get PRESENT bit of a PASID table entry. */
|
|
static inline bool pasid_pte_is_present(struct pasid_entry *pte)
|
|
{
|
|
return READ_ONCE(pte->val[0]) & PASID_PTE_PRESENT;
|
|
}
|
|
|
|
extern unsigned int intel_pasid_max_id;
|
|
int intel_pasid_alloc_table(struct device *dev);
|
|
void intel_pasid_free_table(struct device *dev);
|
|
struct pasid_table *intel_pasid_get_table(struct device *dev);
|
|
int intel_pasid_setup_first_level(struct intel_iommu *iommu,
|
|
struct device *dev, pgd_t *pgd,
|
|
u32 pasid, u16 did, int flags);
|
|
int intel_pasid_setup_second_level(struct intel_iommu *iommu,
|
|
struct dmar_domain *domain,
|
|
struct device *dev, u32 pasid);
|
|
int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
|
|
struct dmar_domain *domain,
|
|
struct device *dev, u32 pasid);
|
|
int intel_pasid_setup_nested(struct intel_iommu *iommu,
|
|
struct device *dev, pgd_t *pgd, u32 pasid,
|
|
struct iommu_gpasid_bind_data_vtd *pasid_data,
|
|
struct dmar_domain *domain, int addr_width);
|
|
void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
|
|
struct device *dev, u32 pasid,
|
|
bool fault_ignore);
|
|
int vcmd_alloc_pasid(struct intel_iommu *iommu, u32 *pasid);
|
|
void vcmd_free_pasid(struct intel_iommu *iommu, u32 pasid);
|
|
#endif /* __INTEL_PASID_H */
|