diff options
Diffstat (limited to 'include/linux/iommu.h')
| -rw-r--r-- | include/linux/iommu.h | 138 |
1 files changed, 103 insertions, 35 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 0ff5111f6959..6a6de187ddc0 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -31,6 +31,13 @@ #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ #define IOMMU_NOEXEC (1 << 3) #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ +/* + * This is to make the IOMMU API setup privileged + * mapppings accessible by the master only at higher + * privileged execution level and inaccessible at + * less privileged levels. + */ +#define IOMMU_PRIV (1 << 5) struct iommu_ops; struct iommu_group; @@ -117,18 +124,25 @@ enum iommu_attr { DOMAIN_ATTR_MAX, }; +/* These are the possible reserved region types */ +#define IOMMU_RESV_DIRECT (1 << 0) +#define IOMMU_RESV_RESERVED (1 << 1) +#define IOMMU_RESV_MSI (1 << 2) + /** - * struct iommu_dm_region - descriptor for a direct mapped memory region + * 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_dm_region { +struct iommu_resv_region { struct list_head list; phys_addr_t start; size_t length; int prot; + int type; }; #ifdef CONFIG_IOMMU_API @@ -150,9 +164,9 @@ struct iommu_dm_region { * @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 + * @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 * @domain_set_windows: Set the number of windows for a domain @@ -184,11 +198,12 @@ struct iommu_ops { 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); + /* 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, @@ -204,6 +219,42 @@ struct iommu_ops { unsigned long pgsize_bitmap; }; +/** + * 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; +}; + +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; +} + +static inline void iommu_device_set_fwnode(struct iommu_device *iommu, + struct fwnode_handle *fwnode) +{ + iommu->fwnode = fwnode; +} + #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 */ @@ -233,9 +284,13 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t io 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 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 struct iommu_resv_region * +iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, int 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); @@ -267,12 +322,6 @@ 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, @@ -352,15 +401,14 @@ 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); -void iommu_register_instance(struct fwnode_handle *fwnode, - const struct iommu_ops *ops); -const struct iommu_ops *iommu_get_instance(struct fwnode_handle *fwnode); +const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode); #else /* CONFIG_IOMMU_API */ struct iommu_ops {}; struct iommu_group {}; struct iommu_fwspec {}; +struct iommu_device {}; static inline bool iommu_present(struct bus_type *bus) { @@ -443,16 +491,22 @@ static inline void iommu_set_fault_handler(struct iommu_domain *domain, { } -static inline void iommu_get_dm_regions(struct device *dev, +static inline void iommu_get_resv_regions(struct device *dev, struct list_head *list) { } -static inline void iommu_put_dm_regions(struct device *dev, +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; @@ -546,15 +600,34 @@ static inline int iommu_domain_set_attr(struct iommu_domain *domain, return -EINVAL; } -static inline struct device *iommu_device_create(struct device *parent, - void *drvdata, - const struct attribute_group **groups, - const char *fmt, ...) +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 void iommu_device_unregister(struct iommu_device *iommu) { - return ERR_PTR(-ENODEV); } -static inline void iommu_device_destroy(struct device *dev) +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) { } @@ -584,13 +657,8 @@ static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids, return -ENODEV; } -static inline void iommu_register_instance(struct fwnode_handle *fwnode, - const struct iommu_ops *ops) -{ -} - static inline -const struct iommu_ops *iommu_get_instance(struct fwnode_handle *fwnode) +const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode) { return NULL; } |
