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1085 lines
33 KiB
C
1085 lines
33 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
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* Author: Joerg Roedel <joerg.roedel@amd.com>
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*/
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#ifndef __LINUX_IOMMU_H
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#define __LINUX_IOMMU_H
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#include <linux/scatterlist.h>
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#include <linux/device.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/ioasid.h>
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#include <uapi/linux/iommu.h>
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#define IOMMU_READ (1 << 0)
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#define IOMMU_WRITE (1 << 1)
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#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
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#define IOMMU_NOEXEC (1 << 3)
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#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
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/*
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* Where the bus hardware includes a privilege level as part of its access type
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* markings, and certain devices are capable of issuing transactions marked as
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* either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
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* given permission flags only apply to accesses at the higher privilege level,
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* and that unprivileged transactions should have as little access as possible.
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* This would usually imply the same permissions as kernel mappings on the CPU,
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* if the IOMMU page table format is equivalent.
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*/
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#define IOMMU_PRIV (1 << 5)
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/*
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* Non-coherent masters can use this page protection flag to set cacheable
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* memory attributes for only a transparent outer level of cache, also known as
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* the last-level or system cache.
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*/
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#define IOMMU_SYS_CACHE_ONLY (1 << 6)
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struct iommu_ops;
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struct iommu_group;
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struct bus_type;
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struct device;
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struct iommu_domain;
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struct notifier_block;
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struct iommu_sva;
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struct iommu_fault_event;
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/* iommu fault flags */
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#define IOMMU_FAULT_READ 0x0
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#define IOMMU_FAULT_WRITE 0x1
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typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
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struct device *, unsigned long, int, void *);
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typedef int (*iommu_mm_exit_handler_t)(struct device *dev, struct iommu_sva *,
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void *);
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typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *);
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struct iommu_domain_geometry {
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dma_addr_t aperture_start; /* First address that can be mapped */
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dma_addr_t aperture_end; /* Last address that can be mapped */
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bool force_aperture; /* DMA only allowed in mappable range? */
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};
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/* Domain feature flags */
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#define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
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#define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
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implementation */
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#define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
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/*
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* This are the possible domain-types
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*
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* IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
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* devices
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* IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
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* IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
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* for VMs
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* IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
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* This flag allows IOMMU drivers to implement
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* certain optimizations for these domains
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*/
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#define IOMMU_DOMAIN_BLOCKED (0U)
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#define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
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#define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
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#define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
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__IOMMU_DOMAIN_DMA_API)
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struct iommu_domain {
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unsigned type;
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const struct iommu_ops *ops;
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unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
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iommu_fault_handler_t handler;
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void *handler_token;
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struct iommu_domain_geometry geometry;
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void *iova_cookie;
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};
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enum iommu_cap {
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IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
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transactions */
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IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
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IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
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};
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/*
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* Following constraints are specifc to FSL_PAMUV1:
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* -aperture must be power of 2, and naturally aligned
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* -number of windows must be power of 2, and address space size
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* of each window is determined by aperture size / # of windows
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* -the actual size of the mapped region of a window must be power
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* of 2 starting with 4KB and physical address must be naturally
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* aligned.
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* DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
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* The caller can invoke iommu_domain_get_attr to check if the underlying
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* iommu implementation supports these constraints.
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*/
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enum iommu_attr {
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DOMAIN_ATTR_GEOMETRY,
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DOMAIN_ATTR_PAGING,
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DOMAIN_ATTR_WINDOWS,
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DOMAIN_ATTR_FSL_PAMU_STASH,
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DOMAIN_ATTR_FSL_PAMU_ENABLE,
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DOMAIN_ATTR_FSL_PAMUV1,
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DOMAIN_ATTR_NESTING, /* two stages of translation */
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DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
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DOMAIN_ATTR_MAX,
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};
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/* These are the possible reserved region types */
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enum iommu_resv_type {
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/* Memory regions which must be mapped 1:1 at all times */
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IOMMU_RESV_DIRECT,
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/*
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* Memory regions which are advertised to be 1:1 but are
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* commonly considered relaxable in some conditions,
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* for instance in device assignment use case (USB, Graphics)
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*/
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IOMMU_RESV_DIRECT_RELAXABLE,
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/* Arbitrary "never map this or give it to a device" address ranges */
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IOMMU_RESV_RESERVED,
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/* Hardware MSI region (untranslated) */
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IOMMU_RESV_MSI,
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/* Software-managed MSI translation window */
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IOMMU_RESV_SW_MSI,
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};
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/**
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* struct iommu_resv_region - descriptor for a reserved memory region
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* @list: Linked list pointers
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* @start: System physical start address of the region
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* @length: Length of the region in bytes
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* @prot: IOMMU Protection flags (READ/WRITE/...)
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* @type: Type of the reserved region
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*/
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struct iommu_resv_region {
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struct list_head list;
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phys_addr_t start;
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size_t length;
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int prot;
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enum iommu_resv_type type;
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};
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/* Per device IOMMU features */
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enum iommu_dev_features {
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IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
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IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
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};
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#define IOMMU_PASID_INVALID (-1U)
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/**
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* struct iommu_sva_ops - device driver callbacks for an SVA context
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*
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* @mm_exit: called when the mm is about to be torn down by exit_mmap. After
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* @mm_exit returns, the device must not issue any more transaction
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* with the PASID given as argument.
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*
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* The @mm_exit handler is allowed to sleep. Be careful about the
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* locks taken in @mm_exit, because they might lead to deadlocks if
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* they are also held when dropping references to the mm. Consider the
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* following call chain:
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* mutex_lock(A); mmput(mm) -> exit_mm() -> @mm_exit() -> mutex_lock(A)
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* Using mmput_async() prevents this scenario.
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*
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*/
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struct iommu_sva_ops {
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iommu_mm_exit_handler_t mm_exit;
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};
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#ifdef CONFIG_IOMMU_API
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/**
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* struct iommu_iotlb_gather - Range information for a pending IOTLB flush
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*
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* @start: IOVA representing the start of the range to be flushed
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* @end: IOVA representing the end of the range to be flushed (exclusive)
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* @pgsize: The interval at which to perform the flush
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*
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* This structure is intended to be updated by multiple calls to the
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* ->unmap() function in struct iommu_ops before eventually being passed
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* into ->iotlb_sync().
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*/
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struct iommu_iotlb_gather {
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unsigned long start;
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unsigned long end;
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size_t pgsize;
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};
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/**
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* struct iommu_ops - iommu ops and capabilities
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* @capable: check capability
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* @domain_alloc: allocate iommu domain
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* @domain_free: free iommu domain
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* @attach_dev: attach device to an iommu domain
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* @detach_dev: detach device from an iommu domain
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* @map: map a physically contiguous memory region to an iommu domain
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* @unmap: unmap a physically contiguous memory region from an iommu domain
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* @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
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* @iotlb_sync_map: Sync mappings created recently using @map to the hardware
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* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
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* queue
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* @iova_to_phys: translate iova to physical address
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* @add_device: add device to iommu grouping
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* @remove_device: remove device from iommu grouping
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* @device_group: find iommu group for a particular device
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* @domain_get_attr: Query domain attributes
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* @domain_set_attr: Change domain attributes
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* @get_resv_regions: Request list of reserved regions for a device
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* @put_resv_regions: Free list of reserved regions for a device
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* @apply_resv_region: Temporary helper call-back for iova reserved ranges
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* @domain_window_enable: Configure and enable a particular window for a domain
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* @domain_window_disable: Disable a particular window for a domain
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* @of_xlate: add OF master IDs to iommu grouping
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* @is_attach_deferred: Check if domain attach should be deferred from iommu
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* driver init to device driver init (default no)
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* @dev_has/enable/disable_feat: per device entries to check/enable/disable
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* iommu specific features.
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* @dev_feat_enabled: check enabled feature
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* @aux_attach/detach_dev: aux-domain specific attach/detach entries.
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* @aux_get_pasid: get the pasid given an aux-domain
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* @sva_bind: Bind process address space to device
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* @sva_unbind: Unbind process address space from device
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* @sva_get_pasid: Get PASID associated to a SVA handle
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* @page_response: handle page request response
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* @cache_invalidate: invalidate translation caches
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* @sva_bind_gpasid: bind guest pasid and mm
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* @sva_unbind_gpasid: unbind guest pasid and mm
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* @pgsize_bitmap: bitmap of all possible supported page sizes
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* @owner: Driver module providing these ops
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*/
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struct iommu_ops {
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bool (*capable)(enum iommu_cap);
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/* Domain allocation and freeing by the iommu driver */
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struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
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void (*domain_free)(struct iommu_domain *);
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int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
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void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
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int (*map)(struct iommu_domain *domain, unsigned long iova,
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phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
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size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
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size_t size, struct iommu_iotlb_gather *iotlb_gather);
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void (*flush_iotlb_all)(struct iommu_domain *domain);
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void (*iotlb_sync_map)(struct iommu_domain *domain);
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void (*iotlb_sync)(struct iommu_domain *domain,
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struct iommu_iotlb_gather *iotlb_gather);
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phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
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int (*add_device)(struct device *dev);
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void (*remove_device)(struct device *dev);
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struct iommu_group *(*device_group)(struct device *dev);
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int (*domain_get_attr)(struct iommu_domain *domain,
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enum iommu_attr attr, void *data);
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int (*domain_set_attr)(struct iommu_domain *domain,
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enum iommu_attr attr, void *data);
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/* Request/Free a list of reserved regions for a device */
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void (*get_resv_regions)(struct device *dev, struct list_head *list);
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void (*put_resv_regions)(struct device *dev, struct list_head *list);
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void (*apply_resv_region)(struct device *dev,
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struct iommu_domain *domain,
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struct iommu_resv_region *region);
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/* Window handling functions */
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int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
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phys_addr_t paddr, u64 size, int prot);
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void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
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int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
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bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
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/* Per device IOMMU features */
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bool (*dev_has_feat)(struct device *dev, enum iommu_dev_features f);
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bool (*dev_feat_enabled)(struct device *dev, enum iommu_dev_features f);
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int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
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int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
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/* Aux-domain specific attach/detach entries */
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int (*aux_attach_dev)(struct iommu_domain *domain, struct device *dev);
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void (*aux_detach_dev)(struct iommu_domain *domain, struct device *dev);
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int (*aux_get_pasid)(struct iommu_domain *domain, struct device *dev);
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struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm,
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void *drvdata);
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void (*sva_unbind)(struct iommu_sva *handle);
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int (*sva_get_pasid)(struct iommu_sva *handle);
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int (*page_response)(struct device *dev,
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struct iommu_fault_event *evt,
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struct iommu_page_response *msg);
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int (*cache_invalidate)(struct iommu_domain *domain, struct device *dev,
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struct iommu_cache_invalidate_info *inv_info);
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int (*sva_bind_gpasid)(struct iommu_domain *domain,
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struct device *dev, struct iommu_gpasid_bind_data *data);
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int (*sva_unbind_gpasid)(struct device *dev, int pasid);
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unsigned long pgsize_bitmap;
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struct module *owner;
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};
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/**
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* struct iommu_device - IOMMU core representation of one IOMMU hardware
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* instance
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* @list: Used by the iommu-core to keep a list of registered iommus
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* @ops: iommu-ops for talking to this iommu
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* @dev: struct device for sysfs handling
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*/
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struct iommu_device {
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struct list_head list;
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const struct iommu_ops *ops;
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struct fwnode_handle *fwnode;
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struct device *dev;
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};
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/**
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* struct iommu_fault_event - Generic fault event
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*
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* Can represent recoverable faults such as a page requests or
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* unrecoverable faults such as DMA or IRQ remapping faults.
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*
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* @fault: fault descriptor
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* @list: pending fault event list, used for tracking responses
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*/
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struct iommu_fault_event {
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struct iommu_fault fault;
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struct list_head list;
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};
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/**
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* struct iommu_fault_param - per-device IOMMU fault data
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* @handler: Callback function to handle IOMMU faults at device level
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* @data: handler private data
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* @faults: holds the pending faults which needs response
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* @lock: protect pending faults list
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*/
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struct iommu_fault_param {
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iommu_dev_fault_handler_t handler;
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void *data;
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struct list_head faults;
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struct mutex lock;
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};
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/**
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* struct iommu_param - collection of per-device IOMMU data
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*
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* @fault_param: IOMMU detected device fault reporting data
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*
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* TODO: migrate other per device data pointers under iommu_dev_data, e.g.
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* struct iommu_group *iommu_group;
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* struct iommu_fwspec *iommu_fwspec;
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*/
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struct iommu_param {
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struct mutex lock;
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struct iommu_fault_param *fault_param;
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};
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int iommu_device_register(struct iommu_device *iommu);
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void iommu_device_unregister(struct iommu_device *iommu);
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int iommu_device_sysfs_add(struct iommu_device *iommu,
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struct device *parent,
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const struct attribute_group **groups,
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const char *fmt, ...) __printf(4, 5);
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void iommu_device_sysfs_remove(struct iommu_device *iommu);
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int iommu_device_link(struct iommu_device *iommu, struct device *link);
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void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
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static inline void __iommu_device_set_ops(struct iommu_device *iommu,
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const struct iommu_ops *ops)
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{
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iommu->ops = ops;
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}
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#define iommu_device_set_ops(iommu, ops) \
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do { \
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struct iommu_ops *__ops = (struct iommu_ops *)(ops); \
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__ops->owner = THIS_MODULE; \
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__iommu_device_set_ops(iommu, __ops); \
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} while (0)
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static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
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struct fwnode_handle *fwnode)
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{
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iommu->fwnode = fwnode;
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}
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static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
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{
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return (struct iommu_device *)dev_get_drvdata(dev);
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}
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static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
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{
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*gather = (struct iommu_iotlb_gather) {
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.start = ULONG_MAX,
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};
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}
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#define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
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#define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
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#define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
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#define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
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#define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
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#define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
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extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
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extern bool iommu_present(struct bus_type *bus);
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extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
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extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
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extern struct iommu_group *iommu_group_get_by_id(int id);
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extern void iommu_domain_free(struct iommu_domain *domain);
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extern int iommu_attach_device(struct iommu_domain *domain,
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|
struct device *dev);
|
|
extern void iommu_detach_device(struct iommu_domain *domain,
|
|
struct device *dev);
|
|
extern int iommu_cache_invalidate(struct iommu_domain *domain,
|
|
struct device *dev,
|
|
struct iommu_cache_invalidate_info *inv_info);
|
|
extern int iommu_sva_bind_gpasid(struct iommu_domain *domain,
|
|
struct device *dev, struct iommu_gpasid_bind_data *data);
|
|
extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
|
|
struct device *dev, ioasid_t pasid);
|
|
extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
|
|
extern struct iommu_domain *iommu_get_dma_domain(struct device *dev);
|
|
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
|
|
phys_addr_t paddr, size_t size, int prot);
|
|
extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova,
|
|
phys_addr_t paddr, size_t size, int prot);
|
|
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
|
|
size_t size);
|
|
extern size_t iommu_unmap_fast(struct iommu_domain *domain,
|
|
unsigned long iova, size_t size,
|
|
struct iommu_iotlb_gather *iotlb_gather);
|
|
extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
|
|
struct scatterlist *sg,unsigned int nents, int prot);
|
|
extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
|
|
unsigned long iova, struct scatterlist *sg,
|
|
unsigned int nents, int prot);
|
|
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
|
|
extern void iommu_set_fault_handler(struct iommu_domain *domain,
|
|
iommu_fault_handler_t handler, void *token);
|
|
|
|
extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
|
|
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
|
|
extern void generic_iommu_put_resv_regions(struct device *dev,
|
|
struct list_head *list);
|
|
extern int iommu_request_dm_for_dev(struct device *dev);
|
|
extern int iommu_request_dma_domain_for_dev(struct device *dev);
|
|
extern void iommu_set_default_passthrough(bool cmd_line);
|
|
extern void iommu_set_default_translated(bool cmd_line);
|
|
extern bool iommu_default_passthrough(void);
|
|
extern struct iommu_resv_region *
|
|
iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
|
|
enum iommu_resv_type type);
|
|
extern int iommu_get_group_resv_regions(struct iommu_group *group,
|
|
struct list_head *head);
|
|
|
|
extern int iommu_attach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group);
|
|
extern void iommu_detach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group);
|
|
extern struct iommu_group *iommu_group_alloc(void);
|
|
extern void *iommu_group_get_iommudata(struct iommu_group *group);
|
|
extern void iommu_group_set_iommudata(struct iommu_group *group,
|
|
void *iommu_data,
|
|
void (*release)(void *iommu_data));
|
|
extern int iommu_group_set_name(struct iommu_group *group, const char *name);
|
|
extern int iommu_group_add_device(struct iommu_group *group,
|
|
struct device *dev);
|
|
extern void iommu_group_remove_device(struct device *dev);
|
|
extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
|
|
int (*fn)(struct device *, void *));
|
|
extern struct iommu_group *iommu_group_get(struct device *dev);
|
|
extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
|
|
extern void iommu_group_put(struct iommu_group *group);
|
|
extern int iommu_group_register_notifier(struct iommu_group *group,
|
|
struct notifier_block *nb);
|
|
extern int iommu_group_unregister_notifier(struct iommu_group *group,
|
|
struct notifier_block *nb);
|
|
extern int iommu_register_device_fault_handler(struct device *dev,
|
|
iommu_dev_fault_handler_t handler,
|
|
void *data);
|
|
|
|
extern int iommu_unregister_device_fault_handler(struct device *dev);
|
|
|
|
extern int iommu_report_device_fault(struct device *dev,
|
|
struct iommu_fault_event *evt);
|
|
extern int iommu_page_response(struct device *dev,
|
|
struct iommu_page_response *msg);
|
|
|
|
extern int iommu_group_id(struct iommu_group *group);
|
|
extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
|
|
extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
|
|
|
|
extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
|
|
void *data);
|
|
extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
|
|
void *data);
|
|
|
|
/* Window handling function prototypes */
|
|
extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
|
|
phys_addr_t offset, u64 size,
|
|
int prot);
|
|
extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
|
|
|
|
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
|
|
unsigned long iova, int flags);
|
|
|
|
static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
|
|
{
|
|
if (domain->ops->flush_iotlb_all)
|
|
domain->ops->flush_iotlb_all(domain);
|
|
}
|
|
|
|
static inline void iommu_tlb_sync(struct iommu_domain *domain,
|
|
struct iommu_iotlb_gather *iotlb_gather)
|
|
{
|
|
if (domain->ops->iotlb_sync)
|
|
domain->ops->iotlb_sync(domain, iotlb_gather);
|
|
|
|
iommu_iotlb_gather_init(iotlb_gather);
|
|
}
|
|
|
|
static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
|
|
struct iommu_iotlb_gather *gather,
|
|
unsigned long iova, size_t size)
|
|
{
|
|
unsigned long start = iova, end = start + size;
|
|
|
|
/*
|
|
* If the new page is disjoint from the current range or is mapped at
|
|
* a different granularity, then sync the TLB so that the gather
|
|
* structure can be rewritten.
|
|
*/
|
|
if (gather->pgsize != size ||
|
|
end < gather->start || start > gather->end) {
|
|
if (gather->pgsize)
|
|
iommu_tlb_sync(domain, gather);
|
|
gather->pgsize = size;
|
|
}
|
|
|
|
if (gather->end < end)
|
|
gather->end = end;
|
|
|
|
if (gather->start > start)
|
|
gather->start = start;
|
|
}
|
|
|
|
/* PCI device grouping function */
|
|
extern struct iommu_group *pci_device_group(struct device *dev);
|
|
/* Generic device grouping function */
|
|
extern struct iommu_group *generic_device_group(struct device *dev);
|
|
/* FSL-MC device grouping function */
|
|
struct iommu_group *fsl_mc_device_group(struct device *dev);
|
|
|
|
/**
|
|
* struct iommu_fwspec - per-device IOMMU instance data
|
|
* @ops: ops for this device's IOMMU
|
|
* @iommu_fwnode: firmware handle for this device's IOMMU
|
|
* @iommu_priv: IOMMU driver private data for this device
|
|
* @num_pasid_bits: number of PASID bits supported by this device
|
|
* @num_ids: number of associated device IDs
|
|
* @ids: IDs which this device may present to the IOMMU
|
|
*/
|
|
struct iommu_fwspec {
|
|
const struct iommu_ops *ops;
|
|
struct fwnode_handle *iommu_fwnode;
|
|
void *iommu_priv;
|
|
u32 flags;
|
|
u32 num_pasid_bits;
|
|
unsigned int num_ids;
|
|
u32 ids[1];
|
|
};
|
|
|
|
/* ATS is supported */
|
|
#define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
|
|
|
|
/**
|
|
* struct iommu_sva - handle to a device-mm bond
|
|
*/
|
|
struct iommu_sva {
|
|
struct device *dev;
|
|
const struct iommu_sva_ops *ops;
|
|
};
|
|
|
|
int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
|
|
const struct iommu_ops *ops);
|
|
void iommu_fwspec_free(struct device *dev);
|
|
int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
|
|
const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
|
|
|
|
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
|
|
{
|
|
return dev->iommu_fwspec;
|
|
}
|
|
|
|
static inline void dev_iommu_fwspec_set(struct device *dev,
|
|
struct iommu_fwspec *fwspec)
|
|
{
|
|
dev->iommu_fwspec = fwspec;
|
|
}
|
|
|
|
int iommu_probe_device(struct device *dev);
|
|
void iommu_release_device(struct device *dev);
|
|
|
|
bool iommu_dev_has_feature(struct device *dev, enum iommu_dev_features f);
|
|
int iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features f);
|
|
int iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features f);
|
|
bool iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features f);
|
|
int iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev);
|
|
void iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev);
|
|
int iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev);
|
|
|
|
struct iommu_sva *iommu_sva_bind_device(struct device *dev,
|
|
struct mm_struct *mm,
|
|
void *drvdata);
|
|
void iommu_sva_unbind_device(struct iommu_sva *handle);
|
|
int iommu_sva_set_ops(struct iommu_sva *handle,
|
|
const struct iommu_sva_ops *ops);
|
|
int iommu_sva_get_pasid(struct iommu_sva *handle);
|
|
|
|
#else /* CONFIG_IOMMU_API */
|
|
|
|
struct iommu_ops {};
|
|
struct iommu_group {};
|
|
struct iommu_fwspec {};
|
|
struct iommu_device {};
|
|
struct iommu_fault_param {};
|
|
struct iommu_iotlb_gather {};
|
|
|
|
static inline bool iommu_present(struct bus_type *bus)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct iommu_group *iommu_group_get_by_id(int id)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iommu_domain_free(struct iommu_domain *domain)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_attach_device(struct iommu_domain *domain,
|
|
struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_detach_device(struct iommu_domain *domain,
|
|
struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
|
|
phys_addr_t paddr, size_t size, int prot)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_map_atomic(struct iommu_domain *domain,
|
|
unsigned long iova, phys_addr_t paddr,
|
|
size_t size, int prot)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline size_t iommu_unmap(struct iommu_domain *domain,
|
|
unsigned long iova, size_t size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
|
|
unsigned long iova, int gfp_order,
|
|
struct iommu_iotlb_gather *iotlb_gather)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline size_t iommu_map_sg(struct iommu_domain *domain,
|
|
unsigned long iova, struct scatterlist *sg,
|
|
unsigned int nents, int prot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
|
|
unsigned long iova, struct scatterlist *sg,
|
|
unsigned int nents, int prot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_tlb_sync(struct iommu_domain *domain,
|
|
struct iommu_iotlb_gather *iotlb_gather)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_domain_window_enable(struct iommu_domain *domain,
|
|
u32 wnd_nr, phys_addr_t paddr,
|
|
u64 size, int prot)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_domain_window_disable(struct iommu_domain *domain,
|
|
u32 wnd_nr)
|
|
{
|
|
}
|
|
|
|
static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void iommu_set_fault_handler(struct iommu_domain *domain,
|
|
iommu_fault_handler_t handler, void *token)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_get_resv_regions(struct device *dev,
|
|
struct list_head *list)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_put_resv_regions(struct device *dev,
|
|
struct list_head *list)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_get_group_resv_regions(struct iommu_group *group,
|
|
struct list_head *head)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_request_dm_for_dev(struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_request_dma_domain_for_dev(struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_set_default_passthrough(bool cmd_line)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_set_default_translated(bool cmd_line)
|
|
{
|
|
}
|
|
|
|
static inline bool iommu_default_passthrough(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline int iommu_attach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_detach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group)
|
|
{
|
|
}
|
|
|
|
static inline struct iommu_group *iommu_group_alloc(void)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline void *iommu_group_get_iommudata(struct iommu_group *group)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iommu_group_set_iommudata(struct iommu_group *group,
|
|
void *iommu_data,
|
|
void (*release)(void *iommu_data))
|
|
{
|
|
}
|
|
|
|
static inline int iommu_group_set_name(struct iommu_group *group,
|
|
const char *name)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_group_add_device(struct iommu_group *group,
|
|
struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_group_remove_device(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_group_for_each_dev(struct iommu_group *group,
|
|
void *data,
|
|
int (*fn)(struct device *, void *))
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline struct iommu_group *iommu_group_get(struct device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iommu_group_put(struct iommu_group *group)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_group_register_notifier(struct iommu_group *group,
|
|
struct notifier_block *nb)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_group_unregister_notifier(struct iommu_group *group,
|
|
struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
int iommu_register_device_fault_handler(struct device *dev,
|
|
iommu_dev_fault_handler_t handler,
|
|
void *data)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_unregister_device_fault_handler(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
int iommu_report_device_fault(struct device *dev, struct iommu_fault_event *evt)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_page_response(struct device *dev,
|
|
struct iommu_page_response *msg)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_group_id(struct iommu_group *group)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_domain_get_attr(struct iommu_domain *domain,
|
|
enum iommu_attr attr, void *data)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int iommu_domain_set_attr(struct iommu_domain *domain,
|
|
enum iommu_attr attr, void *data)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int iommu_device_register(struct iommu_device *iommu)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_device_set_ops(struct iommu_device *iommu,
|
|
const struct iommu_ops *ops)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
|
|
struct fwnode_handle *fwnode)
|
|
{
|
|
}
|
|
|
|
static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
|
|
struct iommu_iotlb_gather *gather,
|
|
unsigned long iova, size_t size)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_device_unregister(struct iommu_device *iommu)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
|
|
struct device *parent,
|
|
const struct attribute_group **groups,
|
|
const char *fmt, ...)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_device_link(struct device *dev, struct device *link)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void iommu_device_unlink(struct device *dev, struct device *link)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_fwspec_init(struct device *dev,
|
|
struct fwnode_handle *iommu_fwnode,
|
|
const struct iommu_ops *ops)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_fwspec_free(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
|
|
int num_ids)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline
|
|
const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool
|
|
iommu_dev_has_feature(struct device *dev, enum iommu_dev_features feat)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
iommu_dev_feature_enabled(struct device *dev, enum iommu_dev_features feat)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int
|
|
iommu_dev_enable_feature(struct device *dev, enum iommu_dev_features feat)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int
|
|
iommu_dev_disable_feature(struct device *dev, enum iommu_dev_features feat)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int
|
|
iommu_aux_attach_device(struct iommu_domain *domain, struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void
|
|
iommu_aux_detach_device(struct iommu_domain *domain, struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int
|
|
iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline struct iommu_sva *
|
|
iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iommu_sva_unbind_device(struct iommu_sva *handle)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_sva_set_ops(struct iommu_sva *handle,
|
|
const struct iommu_sva_ops *ops)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int iommu_sva_get_pasid(struct iommu_sva *handle)
|
|
{
|
|
return IOMMU_PASID_INVALID;
|
|
}
|
|
|
|
static inline int
|
|
iommu_cache_invalidate(struct iommu_domain *domain,
|
|
struct device *dev,
|
|
struct iommu_cache_invalidate_info *inv_info)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
static inline int iommu_sva_bind_gpasid(struct iommu_domain *domain,
|
|
struct device *dev, struct iommu_gpasid_bind_data *data)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain,
|
|
struct device *dev, int pasid)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
#endif /* CONFIG_IOMMU_API */
|
|
|
|
#ifdef CONFIG_IOMMU_DEBUGFS
|
|
extern struct dentry *iommu_debugfs_dir;
|
|
void iommu_debugfs_setup(void);
|
|
#else
|
|
static inline void iommu_debugfs_setup(void) {}
|
|
#endif
|
|
|
|
#endif /* __LINUX_IOMMU_H */
|