diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device.h | 3 | ||||
| -rw-r--r-- | include/linux/dma-iommu.h | 49 | ||||
| -rw-r--r-- | include/linux/intel-iommu.h | 7 | ||||
| -rw-r--r-- | include/linux/intel-svm.h | 2 | ||||
| -rw-r--r-- | include/linux/io-pgtable.h | 11 | ||||
| -rw-r--r-- | include/linux/iommu.h | 105 | ||||
| -rw-r--r-- | include/uapi/linux/iommu.h | 155 |
7 files changed, 279 insertions, 53 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 4a295e324ac5..b6ff25d9fff4 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -42,6 +42,7 @@ struct iommu_ops; struct iommu_group; struct iommu_fwspec; struct dev_pin_info; +struct iommu_param; struct bus_attribute { struct attribute attr; @@ -961,6 +962,7 @@ struct dev_links_info { * device (i.e. the bus driver that discovered the device). * @iommu_group: IOMMU group the device belongs to. * @iommu_fwspec: IOMMU-specific properties supplied by firmware. + * @iommu_param: Per device generic IOMMU runtime data * * @offline_disabled: If set, the device is permanently online. * @offline: Set after successful invocation of bus type's .offline(). @@ -1054,6 +1056,7 @@ struct device { void (*release)(struct device *dev); struct iommu_group *iommu_group; struct iommu_fwspec *iommu_fwspec; + struct iommu_param *iommu_param; bool offline_disabled:1; bool offline:1; diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h index 37258c8b2063..2112f21f73d8 100644 --- a/include/linux/dma-iommu.h +++ b/include/linux/dma-iommu.h @@ -5,59 +5,21 @@ #ifndef __DMA_IOMMU_H #define __DMA_IOMMU_H -#ifdef __KERNEL__ +#include <linux/errno.h> #include <linux/types.h> -#include <asm/errno.h> #ifdef CONFIG_IOMMU_DMA #include <linux/dma-mapping.h> #include <linux/iommu.h> #include <linux/msi.h> -int iommu_dma_init(void); - /* Domain management interface for IOMMU drivers */ int iommu_get_dma_cookie(struct iommu_domain *domain); int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base); void iommu_put_dma_cookie(struct iommu_domain *domain); /* Setup call for arch DMA mapping code */ -int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, - u64 size, struct device *dev); - -/* General helpers for DMA-API <-> IOMMU-API interaction */ -int dma_info_to_prot(enum dma_data_direction dir, bool coherent, - unsigned long attrs); - -/* - * These implement the bulk of the relevant DMA mapping callbacks, but require - * the arch code to take care of attributes and cache maintenance - */ -struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp, - unsigned long attrs, int prot, dma_addr_t *handle, - void (*flush_page)(struct device *, const void *, phys_addr_t)); -void iommu_dma_free(struct device *dev, struct page **pages, size_t size, - dma_addr_t *handle); - -int iommu_dma_mmap(struct page **pages, size_t size, struct vm_area_struct *vma); - -dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, int prot); -int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, int prot); - -/* - * Arch code with no special attribute handling may use these - * directly as DMA mapping callbacks for simplicity - */ -void iommu_dma_unmap_page(struct device *dev, dma_addr_t handle, size_t size, - enum dma_data_direction dir, unsigned long attrs); -void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction dir, unsigned long attrs); -dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys, - size_t size, enum dma_data_direction dir, unsigned long attrs); -void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle, - size_t size, enum dma_data_direction dir, unsigned long attrs); +void iommu_setup_dma_ops(struct device *dev, u64 dma_base, u64 size); /* The DMA API isn't _quite_ the whole story, though... */ /* @@ -75,16 +37,16 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc, void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); -#else +#else /* CONFIG_IOMMU_DMA */ struct iommu_domain; struct msi_desc; struct msi_msg; struct device; -static inline int iommu_dma_init(void) +static inline void iommu_setup_dma_ops(struct device *dev, u64 dma_base, + u64 size) { - return 0; } static inline int iommu_get_dma_cookie(struct iommu_domain *domain) @@ -117,5 +79,4 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he } #endif /* CONFIG_IOMMU_DMA */ -#endif /* __KERNEL__ */ #endif /* __DMA_IOMMU_H */ diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 6a8dd4af0147..f2ae8a006ff8 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -435,6 +435,12 @@ enum { #define VTD_FLAG_TRANS_PRE_ENABLED (1 << 0) #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED (1 << 1) +extern int intel_iommu_sm; + +#define sm_supported(iommu) (intel_iommu_sm && ecap_smts((iommu)->ecap)) +#define pasid_supported(iommu) (sm_supported(iommu) && \ + ecap_pasid((iommu)->ecap)) + struct pasid_entry; struct pasid_state_entry; struct page_req_dsc; @@ -642,7 +648,6 @@ extern int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu); extern int dmar_ir_support(void); -struct dmar_domain *get_valid_domain_for_dev(struct device *dev); void *alloc_pgtable_page(int node); void free_pgtable_page(void *vaddr); struct intel_iommu *domain_get_iommu(struct dmar_domain *domain); diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h index 54ffcc6a322e..94f047a8a845 100644 --- a/include/linux/intel-svm.h +++ b/include/linux/intel-svm.h @@ -49,7 +49,7 @@ struct svm_dev_ops { /** * intel_svm_bind_mm() - Bind the current process to a PASID - * @dev: Device to be granted acccess + * @dev: Device to be granted access * @pasid: Address for allocated PASID * @flags: Flags. Later for requesting supervisor mode, etc. * @ops: Callbacks to device driver diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 76969a564831..b5a450a3bb47 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -44,6 +44,8 @@ struct iommu_gather_ops { * tables. * @ias: Input address (iova) size, in bits. * @oas: Output address (paddr) size, in bits. + * @coherent_walk A flag to indicate whether or not page table walks made + * by the IOMMU are coherent with the CPU caches. * @tlb: TLB management callbacks for this set of tables. * @iommu_dev: The device representing the DMA configuration for the * page table walker. @@ -68,11 +70,6 @@ struct io_pgtable_cfg { * when the SoC is in "4GB mode" and they can only access the high * remap of DRAM (0x1_00000000 to 0x1_ffffffff). * - * IO_PGTABLE_QUIRK_NO_DMA: Guarantees that the tables will only ever - * be accessed by a fully cache-coherent IOMMU or CPU (e.g. for a - * software-emulated IOMMU), such that pagetable updates need not - * be treated as explicit DMA data. - * * IO_PGTABLE_QUIRK_NON_STRICT: Skip issuing synchronous leaf TLBIs * on unmap, for DMA domains using the flush queue mechanism for * delayed invalidation. @@ -81,12 +78,12 @@ struct io_pgtable_cfg { #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1) #define IO_PGTABLE_QUIRK_TLBI_ON_MAP BIT(2) #define IO_PGTABLE_QUIRK_ARM_MTK_4GB BIT(3) - #define IO_PGTABLE_QUIRK_NO_DMA BIT(4) - #define IO_PGTABLE_QUIRK_NON_STRICT BIT(5) + #define IO_PGTABLE_QUIRK_NON_STRICT BIT(4) unsigned long quirks; unsigned long pgsize_bitmap; unsigned int ias; unsigned int oas; + bool coherent_walk; const struct iommu_gather_ops *tlb; struct device *iommu_dev; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index e552c3b63f6f..fdc355ccc570 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -13,6 +13,7 @@ #include <linux/errno.h> #include <linux/err.h> #include <linux/of.h> +#include <uapi/linux/iommu.h> #define IOMMU_READ (1 << 0) #define IOMMU_WRITE (1 << 1) @@ -29,6 +30,12 @@ * if the IOMMU page table format is equivalent. */ #define IOMMU_PRIV (1 << 5) +/* + * Non-coherent masters on few Qualcomm SoCs can use this page protection flag + * to set correct cacheability attributes to use an outer level of cache - + * last level cache, aka system cache. + */ +#define IOMMU_QCOM_SYS_CACHE (1 << 6) struct iommu_ops; struct iommu_group; @@ -37,6 +44,7 @@ struct device; struct iommu_domain; struct notifier_block; struct iommu_sva; +struct iommu_fault_event; /* iommu fault flags */ #define IOMMU_FAULT_READ 0x0 @@ -46,6 +54,7 @@ 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 */ @@ -123,6 +132,12 @@ enum iommu_attr { 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) */ @@ -212,6 +227,7 @@ struct iommu_sva_ops { * @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 * @pgsize_bitmap: bitmap of all possible supported page sizes */ struct iommu_ops { @@ -272,6 +288,10 @@ struct iommu_ops { 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); + unsigned long pgsize_bitmap; }; @@ -289,6 +309,48 @@ struct iommu_device { 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, @@ -350,6 +412,7 @@ extern void iommu_set_fault_handler(struct iommu_domain *domain, 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 struct iommu_resv_region * iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, enum iommu_resv_type type); @@ -378,6 +441,17 @@ 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 *); @@ -492,6 +566,7 @@ struct iommu_ops {}; struct iommu_group {}; struct iommu_fwspec {}; struct iommu_device {}; +struct iommu_fault_param {}; static inline bool iommu_present(struct bus_type *bus) { @@ -614,6 +689,11 @@ 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 int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group) { @@ -685,6 +765,31 @@ static inline int iommu_group_unregister_notifier(struct iommu_group *group, 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; diff --git a/include/uapi/linux/iommu.h b/include/uapi/linux/iommu.h new file mode 100644 index 000000000000..fc00c5d4741b --- /dev/null +++ b/include/uapi/linux/iommu.h @@ -0,0 +1,155 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * IOMMU user API definitions + */ + +#ifndef _UAPI_IOMMU_H +#define _UAPI_IOMMU_H + +#include <linux/types.h> + +#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */ +#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */ +#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */ +#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */ + +/* Generic fault types, can be expanded IRQ remapping fault */ +enum iommu_fault_type { + IOMMU_FAULT_DMA_UNRECOV = 1, /* unrecoverable fault */ + IOMMU_FAULT_PAGE_REQ, /* page request fault */ +}; + +enum iommu_fault_reason { + IOMMU_FAULT_REASON_UNKNOWN = 0, + + /* Could not access the PASID table (fetch caused external abort) */ + IOMMU_FAULT_REASON_PASID_FETCH, + + /* PASID entry is invalid or has configuration errors */ + IOMMU_FAULT_REASON_BAD_PASID_ENTRY, + + /* + * PASID is out of range (e.g. exceeds the maximum PASID + * supported by the IOMMU) or disabled. + */ + IOMMU_FAULT_REASON_PASID_INVALID, + + /* + * An external abort occurred fetching (or updating) a translation + * table descriptor + */ + IOMMU_FAULT_REASON_WALK_EABT, + + /* + * Could not access the page table entry (Bad address), + * actual translation fault + */ + IOMMU_FAULT_REASON_PTE_FETCH, + + /* Protection flag check failed */ + IOMMU_FAULT_REASON_PERMISSION, + + /* access flag check failed */ + IOMMU_FAULT_REASON_ACCESS, + + /* Output address of a translation stage caused Address Size fault */ + IOMMU_FAULT_REASON_OOR_ADDRESS, +}; + +/** + * struct iommu_fault_unrecoverable - Unrecoverable fault data + * @reason: reason of the fault, from &enum iommu_fault_reason + * @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values) + * @pasid: Process Address Space ID + * @perm: requested permission access using by the incoming transaction + * (IOMMU_FAULT_PERM_* values) + * @addr: offending page address + * @fetch_addr: address that caused a fetch abort, if any + */ +struct iommu_fault_unrecoverable { + __u32 reason; +#define IOMMU_FAULT_UNRECOV_PASID_VALID (1 << 0) +#define IOMMU_FAULT_UNRECOV_ADDR_VALID (1 << 1) +#define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID (1 << 2) + __u32 flags; + __u32 pasid; + __u32 perm; + __u64 addr; + __u64 fetch_addr; +}; + +/** + * struct iommu_fault_page_request - Page Request data + * @flags: encodes whether the corresponding fields are valid and whether this + * is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values) + * @pasid: Process Address Space ID + * @grpid: Page Request Group Index + * @perm: requested page permissions (IOMMU_FAULT_PERM_* values) + * @addr: page address + * @private_data: device-specific private information + */ +struct iommu_fault_page_request { +#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0) +#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1) +#define IOMMU_FAULT_PAGE_REQUEST_PRIV_DATA (1 << 2) + __u32 flags; + __u32 pasid; + __u32 grpid; + __u32 perm; + __u64 addr; + __u64 private_data[2]; +}; + +/** + * struct iommu_fault - Generic fault data + * @type: fault type from &enum iommu_fault_type + * @padding: reserved for future use (should be zero) + * @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV + * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ + * @padding2: sets the fault size to allow for future extensions + */ +struct iommu_fault { + __u32 type; + __u32 padding; + union { + struct iommu_fault_unrecoverable event; + struct iommu_fault_page_request prm; + __u8 padding2[56]; + }; +}; + +/** + * enum iommu_page_response_code - Return status of fault handlers + * @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables + * populated, retry the access. This is "Success" in PCI PRI. + * @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from + * this device if possible. This is "Response Failure" in PCI PRI. + * @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the + * access. This is "Invalid Request" in PCI PRI. + */ +enum iommu_page_response_code { + IOMMU_PAGE_RESP_SUCCESS = 0, + IOMMU_PAGE_RESP_INVALID, + IOMMU_PAGE_RESP_FAILURE, +}; + +/** + * struct iommu_page_response - Generic page response information + * @version: API version of this structure + * @flags: encodes whether the corresponding fields are valid + * (IOMMU_FAULT_PAGE_RESPONSE_* values) + * @pasid: Process Address Space ID + * @grpid: Page Request Group Index + * @code: response code from &enum iommu_page_response_code + */ +struct iommu_page_response { +#define IOMMU_PAGE_RESP_VERSION_1 1 + __u32 version; +#define IOMMU_PAGE_RESP_PASID_VALID (1 << 0) + __u32 flags; + __u32 pasid; + __u32 grpid; + __u32 code; +}; + +#endif /* _UAPI_IOMMU_H */ |