diff options
Diffstat (limited to 'drivers/iommu/intel/intel-pasid.h')
| -rw-r--r-- | drivers/iommu/intel/intel-pasid.h | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/drivers/iommu/intel/intel-pasid.h b/drivers/iommu/intel/intel-pasid.h deleted file mode 100644 index c5318d40e0fa..000000000000 --- a/drivers/iommu/intel/intel-pasid.h +++ /dev/null @@ -1,128 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * intel-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 1 -#define VCMD_VRSP_SC_INVALID_PASID 1 -#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) - -/* - * 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 */ - int 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 u32 intel_pasid_max_id; -int intel_pasid_alloc_id(void *ptr, int start, int end, gfp_t gfp); -void intel_pasid_free_id(int pasid); -void *intel_pasid_lookup_id(int pasid); -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_get_dev_max_id(struct device *dev); -struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid); -int intel_pasid_setup_first_level(struct intel_iommu *iommu, - struct device *dev, pgd_t *pgd, - int pasid, u16 did, int flags); -int intel_pasid_setup_second_level(struct intel_iommu *iommu, - struct dmar_domain *domain, - struct device *dev, int pasid); -int intel_pasid_setup_pass_through(struct intel_iommu *iommu, - struct dmar_domain *domain, - struct device *dev, int pasid); -int intel_pasid_setup_nested(struct intel_iommu *iommu, - struct device *dev, pgd_t *pgd, int 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, int pasid, - bool fault_ignore); -int vcmd_alloc_pasid(struct intel_iommu *iommu, unsigned int *pasid); -void vcmd_free_pasid(struct intel_iommu *iommu, unsigned int pasid); -#endif /* __INTEL_PASID_H */ |