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89535821c0
linux_dsm_epyc7002/include/linux/iommu.h
Jean-Philippe Brucker 89535821c0 iommu/arm-smmu-v3: Parse PASID devicetree property of platform devices 
For platform devices that support SubstreamID (SSID), firmware provides
the number of supported SSID bits. Restrict it to what the SMMU supports
and cache it into master->ssid_bits, which will also be used for PCI
PASID.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
2020-01-15 16:00:57 +00:00

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