119 строки
3.3 KiB
C
119 строки
3.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* IOMMU user API definitions
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*/
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#ifndef _UAPI_IOMMU_H
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#define _UAPI_IOMMU_H
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#include <linux/types.h>
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#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */
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#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */
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#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */
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#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */
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/* Generic fault types, can be expanded IRQ remapping fault */
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enum iommu_fault_type {
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IOMMU_FAULT_DMA_UNRECOV = 1, /* unrecoverable fault */
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IOMMU_FAULT_PAGE_REQ, /* page request fault */
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};
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enum iommu_fault_reason {
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IOMMU_FAULT_REASON_UNKNOWN = 0,
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/* Could not access the PASID table (fetch caused external abort) */
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IOMMU_FAULT_REASON_PASID_FETCH,
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/* PASID entry is invalid or has configuration errors */
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IOMMU_FAULT_REASON_BAD_PASID_ENTRY,
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/*
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* PASID is out of range (e.g. exceeds the maximum PASID
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* supported by the IOMMU) or disabled.
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*/
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IOMMU_FAULT_REASON_PASID_INVALID,
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/*
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* An external abort occurred fetching (or updating) a translation
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* table descriptor
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*/
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IOMMU_FAULT_REASON_WALK_EABT,
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/*
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* Could not access the page table entry (Bad address),
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* actual translation fault
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*/
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IOMMU_FAULT_REASON_PTE_FETCH,
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/* Protection flag check failed */
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IOMMU_FAULT_REASON_PERMISSION,
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/* access flag check failed */
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IOMMU_FAULT_REASON_ACCESS,
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/* Output address of a translation stage caused Address Size fault */
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IOMMU_FAULT_REASON_OOR_ADDRESS,
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};
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/**
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* struct iommu_fault_unrecoverable - Unrecoverable fault data
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* @reason: reason of the fault, from &enum iommu_fault_reason
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* @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values)
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* @pasid: Process Address Space ID
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* @perm: requested permission access using by the incoming transaction
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* (IOMMU_FAULT_PERM_* values)
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* @addr: offending page address
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* @fetch_addr: address that caused a fetch abort, if any
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*/
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struct iommu_fault_unrecoverable {
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__u32 reason;
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#define IOMMU_FAULT_UNRECOV_PASID_VALID (1 << 0)
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#define IOMMU_FAULT_UNRECOV_ADDR_VALID (1 << 1)
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#define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID (1 << 2)
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__u32 flags;
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__u32 pasid;
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__u32 perm;
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__u64 addr;
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__u64 fetch_addr;
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};
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/**
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* struct iommu_fault_page_request - Page Request data
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* @flags: encodes whether the corresponding fields are valid and whether this
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* is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values)
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* @pasid: Process Address Space ID
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* @grpid: Page Request Group Index
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* @perm: requested page permissions (IOMMU_FAULT_PERM_* values)
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* @addr: page address
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* @private_data: device-specific private information
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*/
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struct iommu_fault_page_request {
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#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0)
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#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1)
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#define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2)
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__u32 flags;
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__u32 pasid;
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__u32 grpid;
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__u32 perm;
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__u64 addr;
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__u64 private_data[2];
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};
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/**
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* struct iommu_fault - Generic fault data
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* @type: fault type from &enum iommu_fault_type
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* @padding: reserved for future use (should be zero)
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* @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV
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* @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ
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*/
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struct iommu_fault {
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__u32 type;
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__u32 padding;
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union {
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struct iommu_fault_unrecoverable event;
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struct iommu_fault_page_request prm;
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};
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};
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#endif /* _UAPI_IOMMU_H */
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