| /* |
| * Copyright (C) 2007-2008 Advanced Micro Devices, Inc. |
| * Author: Joerg Roedel <joerg.roedel@amd.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published |
| * by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #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> |
| |
| #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 */ |
| #define IOMMU_PRIV (1 << 5) |
| #define IOMMU_GUARD (1 << 28) /* Guard Page */ |
| /* Use upstream device's bus attribute */ |
| #define IOMMU_USE_UPSTREAM_HINT (1 << 6) |
| |
| struct iommu_ops; |
| struct iommu_group; |
| struct bus_type; |
| struct device; |
| struct iommu_domain; |
| struct notifier_block; |
| |
| /* iommu fault flags */ |
| #define IOMMU_FAULT_READ (1 << 0) |
| #define IOMMU_FAULT_WRITE (1 << 1) |
| #define IOMMU_FAULT_TRANSLATION (1 << 2) |
| #define IOMMU_FAULT_PERMISSION (1 << 3) |
| #define IOMMU_FAULT_EXTERNAL (1 << 4) |
| #define IOMMU_FAULT_TRANSACTION_STALLED (1 << 5) |
| |
| typedef int (*iommu_fault_handler_t)(struct iommu_domain *, |
| struct device *, unsigned long, int, 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? */ |
| }; |
| |
| struct iommu_pgtbl_info { |
| void *pmds; |
| }; |
| |
| /* 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) |
| |
| |
| #define IOMMU_DOMAIN_NAME_LEN 32 |
| 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; |
| char name[IOMMU_DOMAIN_NAME_LEN]; |
| }; |
| |
| 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. |
| * |
| * DOMAIN_ATTR_NO_CFRE |
| * Some bus implementations may enter a bad state if iommu reports an error |
| * on context fault. As context faults are not always fatal, this must be |
| * avoided. |
| */ |
| |
| 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_PT_BASE_ADDR, |
| DOMAIN_ATTR_CONTEXT_BANK, |
| DOMAIN_ATTR_DYNAMIC, |
| DOMAIN_ATTR_TTBR0, |
| DOMAIN_ATTR_CONTEXTIDR, |
| DOMAIN_ATTR_PROCID, |
| DOMAIN_ATTR_NON_FATAL_FAULTS, |
| DOMAIN_ATTR_S1_BYPASS, |
| DOMAIN_ATTR_ATOMIC, |
| DOMAIN_ATTR_SECURE_VMID, |
| DOMAIN_ATTR_FAST, |
| DOMAIN_ATTR_PGTBL_INFO, |
| DOMAIN_ATTR_USE_UPSTREAM_HINT, |
| DOMAIN_ATTR_EARLY_MAP, |
| DOMAIN_ATTR_PAGE_TABLE_IS_COHERENT, |
| DOMAIN_ATTR_PAGE_TABLE_FORCE_COHERENT, |
| DOMAIN_ATTR_CB_STALL_DISABLE, |
| DOMAIN_ATTR_UPSTREAM_IOVA_ALLOCATOR, |
| DOMAIN_ATTR_MMU500_ERRATA_MIN_ALIGN, |
| DOMAIN_ATTR_FORCE_IOVA_GUARD_PAGE, |
| DOMAIN_ATTR_NO_CFRE, |
| DOMAIN_ATTR_MAX, |
| }; |
| |
| /** |
| * struct iommu_dm_region - descriptor for a direct mapped 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/...) |
| */ |
| struct iommu_dm_region { |
| struct list_head list; |
| phys_addr_t start; |
| size_t length; |
| int prot; |
| }; |
| |
| extern struct dentry *iommu_debugfs_top; |
| |
| #ifdef CONFIG_IOMMU_API |
| |
| /** |
| * 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 |
| * @map_sg: map a scatter-gather list of physically contiguous memory chunks |
| * to an iommu domain |
| * @iova_to_phys: translate iova to physical address |
| * @iova_to_phys_hard: translate iova to physical address using IOMMU hardware |
| * @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_dm_regions: Request list of direct mapping requirements for a device |
| * @put_dm_regions: Free list of direct mapping requirements for a device |
| * @apply_dm_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 |
| * @domain_set_windows: Set the number of windows for a domain |
| * @domain_get_windows: Return the number of windows for a domain |
| * @of_xlate: add OF master IDs to iommu grouping |
| * @pgsize_bitmap: bitmap of all possible supported page sizes |
| * @trigger_fault: trigger a fault on the device attached to an iommu domain |
| * @reg_read: read an IOMMU register |
| * @reg_write: write an IOMMU register |
| * @tlbi_domain: Invalidate all TLBs covering an iommu domain |
| * @enable_config_clocks: Enable all config clocks for this domain's IOMMU |
| * @disable_config_clocks: Disable all config clocks for this domain's IOMMU |
| */ |
| 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); |
| size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, |
| size_t size); |
| size_t (*map_sg)(struct iommu_domain *domain, unsigned long iova, |
| struct scatterlist *sg, unsigned int nents, int prot); |
| phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova); |
| phys_addr_t (*iova_to_phys_hard)(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 direct mapping requirements for a device */ |
| void (*get_dm_regions)(struct device *dev, struct list_head *list); |
| void (*put_dm_regions)(struct device *dev, struct list_head *list); |
| void (*apply_dm_region)(struct device *dev, struct iommu_domain *domain, |
| struct iommu_dm_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); |
| /* Set the number of windows per domain */ |
| int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count); |
| /* Get the number of windows per domain */ |
| u32 (*domain_get_windows)(struct iommu_domain *domain); |
| void (*trigger_fault)(struct iommu_domain *domain, unsigned long flags); |
| void (*tlbi_domain)(struct iommu_domain *domain); |
| int (*enable_config_clocks)(struct iommu_domain *domain); |
| void (*disable_config_clocks)(struct iommu_domain *domain); |
| uint64_t (*iova_to_pte)(struct iommu_domain *domain, |
| dma_addr_t iova); |
| |
| int (*of_xlate)(struct device *dev, struct of_phandle_args *args); |
| |
| bool (*is_iova_coherent)(struct iommu_domain *domain, dma_addr_t iova); |
| unsigned long pgsize_bitmap; |
| }; |
| |
| #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 struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); |
| extern size_t iommu_pgsize(unsigned long pgsize_bitmap, |
| unsigned long addr_merge, size_t size); |
| extern int iommu_map(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_map_sg(struct iommu_domain *domain, unsigned long iova, |
| struct scatterlist *sg, unsigned int nents, |
| int prot); |
| extern size_t default_iommu_map_sg(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 phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, |
| dma_addr_t iova); |
| extern bool iommu_is_iova_coherent(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_dm_regions(struct device *dev, struct list_head *list); |
| extern void iommu_put_dm_regions(struct device *dev, struct list_head *list); |
| extern int iommu_request_dm_for_dev(struct device *dev); |
| |
| 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 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_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); |
| struct device *iommu_device_create(struct device *parent, void *drvdata, |
| const struct attribute_group **groups, |
| const char *fmt, ...) __printf(4, 5); |
| void iommu_device_destroy(struct device *dev); |
| int iommu_device_link(struct device *dev, struct device *link); |
| void iommu_device_unlink(struct device *dev, struct device *link); |
| |
| /* 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 uint64_t iommu_iova_to_pte(struct iommu_domain *domain, |
| dma_addr_t iova); |
| |
| extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, |
| unsigned long iova, int flags); |
| |
| extern void iommu_trigger_fault(struct iommu_domain *domain, |
| unsigned long flags); |
| |
| extern unsigned long iommu_reg_read(struct iommu_domain *domain, |
| unsigned long offset); |
| extern void iommu_reg_write(struct iommu_domain *domain, unsigned long offset, |
| unsigned long val); |
| /* 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); |
| |
| static inline void iommu_tlbiall(struct iommu_domain *domain) |
| { |
| if (domain->ops->tlbi_domain) |
| domain->ops->tlbi_domain(domain); |
| } |
| |
| static inline int iommu_enable_config_clocks(struct iommu_domain *domain) |
| { |
| if (domain->ops->enable_config_clocks) |
| return domain->ops->enable_config_clocks(domain); |
| return 0; |
| } |
| |
| static inline void iommu_disable_config_clocks(struct iommu_domain *domain) |
| { |
| if (domain->ops->disable_config_clocks) |
| domain->ops->disable_config_clocks(domain); |
| } |
| |
| /** |
| * 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_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; |
| unsigned int num_ids; |
| u32 ids[1]; |
| }; |
| |
| 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); |
| int iommu_fwspec_get_id(struct device *dev, u32 *id); |
| int iommu_is_available(struct device *dev); |
| |
| #else /* CONFIG_IOMMU_API */ |
| |
| struct iommu_ops {}; |
| struct iommu_group {}; |
| struct iommu_fwspec {}; |
| |
| 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, int gfp_order, int prot) |
| { |
| return -ENODEV; |
| } |
| |
| static inline int iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
| int gfp_order) |
| { |
| return -ENODEV; |
| } |
| |
| static inline size_t iommu_map_sg(struct iommu_domain *domain, |
| unsigned long iova, struct scatterlist *sg, |
| unsigned int nents, int prot) |
| { |
| return -ENODEV; |
| } |
| |
| 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 phys_addr_t iommu_iova_to_phys_hard(struct iommu_domain *domain, |
| dma_addr_t iova) |
| { |
| return 0; |
| } |
| |
| static inline bool iommu_is_iova_coherent(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_dm_regions(struct device *dev, |
| struct list_head *list) |
| { |
| } |
| |
| static inline void iommu_put_dm_regions(struct device *dev, |
| struct list_head *list) |
| { |
| } |
| |
| static inline int iommu_request_dm_for_dev(struct device *dev) |
| { |
| return -ENODEV; |
| } |
| |
| 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_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 struct device *iommu_device_create(struct device *parent, |
| void *drvdata, |
| const struct attribute_group **groups, |
| const char *fmt, ...) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| static inline void iommu_device_destroy(struct device *dev) |
| { |
| } |
| |
| 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 void iommu_trigger_fault(struct iommu_domain *domain, |
| unsigned long flags) |
| { |
| } |
| |
| static inline unsigned long iommu_reg_read(struct iommu_domain *domain, |
| unsigned long offset) |
| { |
| return 0; |
| } |
| |
| static inline void iommu_reg_write(struct iommu_domain *domain, |
| unsigned long val, unsigned long offset) |
| { |
| } |
| |
| static inline void iommu_tlbiall(struct iommu_domain *domain) |
| { |
| } |
| |
| static inline int iommu_enable_config_clocks(struct iommu_domain *domain) |
| { |
| return 0; |
| } |
| |
| static inline void iommu_disable_config_clocks(struct iommu_domain *domain) |
| { |
| } |
| |
| 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 int iommu_fwspec_get_id(struct device *dev, u32 *id) |
| { |
| return -ENODEV; |
| } |
| |
| static inline int iommu_is_available(struct device *dev) |
| { |
| return -ENODEV; |
| } |
| #endif /* CONFIG_IOMMU_API */ |
| |
| #endif /* __LINUX_IOMMU_H */ |