| /* 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) | |
| 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_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) | |
| #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 (inclusive) | |
| * @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 | |
| * @probe_device: Add device to iommu driver handling | |
| * @release_device: Remove device from iommu driver handling | |
| * @probe_finalize: Do final setup work after the device is added to an IOMMU | |
| * group and attached to the groups domain | |
| * @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 | |
| * @def_domain_type: device default domain type, return value: | |
| * - IOMMU_DOMAIN_IDENTITY: must use an identity domain | |
| * - IOMMU_DOMAIN_DMA: must use a dma domain | |
| * - 0: use the default setting | |
| * @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); | |
| struct iommu_device *(*probe_device)(struct device *dev); | |
| void (*release_device)(struct device *dev); | |
| void (*probe_finalize)(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); | |
| u32 (*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, u32 pasid); | |
| int (*def_domain_type)(struct device *dev); | |
| 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 dev_iommu - Collection of per-device IOMMU data | |
| * | |
| * @fault_param: IOMMU detected device fault reporting data | |
| * @fwspec: IOMMU fwspec data | |
| * @iommu_dev: IOMMU device this device is linked to | |
| * @priv: IOMMU Driver private data | |
| * | |
| * TODO: migrate other per device data pointers under iommu_dev_data, e.g. | |
| * struct iommu_group *iommu_group; | |
| */ | |
| struct dev_iommu { | |
| struct mutex lock; | |
| struct iommu_fault_param *fault_param; | |
| struct iommu_fwspec *fwspec; | |
| struct iommu_device *iommu_dev; | |
| void *priv; | |
| }; | |
| 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 int bus_iommu_probe(struct bus_type *bus); | |
| 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_uapi_cache_invalidate(struct iommu_domain *domain, | |
| struct device *dev, | |
| void __user *uinfo); | |
| extern int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, | |
| struct device *dev, void __user *udata); | |
| extern int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, | |
| struct device *dev, void __user *udata); | |
| 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 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_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_iotlb_all(struct iommu_domain *domain) | |
| { | |
| if (domain->ops->flush_iotlb_all) | |
| domain->ops->flush_iotlb_all(domain); | |
| } | |
| static inline void iommu_iotlb_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 - 1; | |
| /* | |
| * 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 + 1 < gather->start || start > gather->end + 1) { | |
| if (gather->pgsize) | |
| iommu_iotlb_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; | |
| u32 flags; | |
| u32 num_pasid_bits; | |
| unsigned int num_ids; | |
| u32 ids[]; | |
| }; | |
| /* 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; | |
| }; | |
| 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) | |
| { | |
| if (dev->iommu) | |
| return dev->iommu->fwspec; | |
| else | |
| return NULL; | |
| } | |
| static inline void dev_iommu_fwspec_set(struct device *dev, | |
| struct iommu_fwspec *fwspec) | |
| { | |
| dev->iommu->fwspec = fwspec; | |
| } | |
| static inline void *dev_iommu_priv_get(struct device *dev) | |
| { | |
| if (dev->iommu) | |
| return dev->iommu->priv; | |
| else | |
| return NULL; | |
| } | |
| static inline void dev_iommu_priv_set(struct device *dev, void *priv) | |
| { | |
| dev->iommu->priv = priv; | |
| } | |
| 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); | |
| u32 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_iotlb_all(struct iommu_domain *domain) | |
| { | |
| } | |
| static inline void iommu_iotlb_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 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 u32 iommu_sva_get_pasid(struct iommu_sva *handle) | |
| { | |
| return IOMMU_PASID_INVALID; | |
| } | |
| static inline int | |
| iommu_uapi_cache_invalidate(struct iommu_domain *domain, | |
| struct device *dev, | |
| struct iommu_cache_invalidate_info *inv_info) | |
| { | |
| return -ENODEV; | |
| } | |
| static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, | |
| struct device *dev, void __user *udata) | |
| { | |
| return -ENODEV; | |
| } | |
| static inline int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, | |
| struct device *dev, void __user *udata) | |
| { | |
| return -ENODEV; | |
| } | |
| static inline int iommu_sva_unbind_gpasid(struct iommu_domain *domain, | |
| struct device *dev, | |
| ioasid_t pasid) | |
| { | |
| return -ENODEV; | |
| } | |
| static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) | |
| { | |
| return NULL; | |
| } | |
| #endif /* CONFIG_IOMMU_API */ | |
| /** | |
| * iommu_map_sgtable - Map the given buffer to the IOMMU domain | |
| * @domain: The IOMMU domain to perform the mapping | |
| * @iova: The start address to map the buffer | |
| * @sgt: The sg_table object describing the buffer | |
| * @prot: IOMMU protection bits | |
| * | |
| * Creates a mapping at @iova for the buffer described by a scatterlist | |
| * stored in the given sg_table object in the provided IOMMU domain. | |
| */ | |
| static inline size_t iommu_map_sgtable(struct iommu_domain *domain, | |
| unsigned long iova, struct sg_table *sgt, int prot) | |
| { | |
| return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot); | |
| } | |
| #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 */ |