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1073 lines
32 KiB
1073 lines
32 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2007-2008 Advanced Micro Devices, Inc. |
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* Author: Joerg Roedel <[email protected]> |
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*/ |
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|
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#ifndef __LINUX_IOMMU_H |
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#define __LINUX_IOMMU_H |
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#include <linux/scatterlist.h> |
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#include <linux/device.h> |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/err.h> |
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#include <linux/of.h> |
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#include <linux/ioasid.h> |
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#include <uapi/linux/iommu.h> |
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#define IOMMU_READ (1 << 0) |
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#define IOMMU_WRITE (1 << 1) |
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#define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ |
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#define IOMMU_NOEXEC (1 << 3) |
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#define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ |
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/* |
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* Where the bus hardware includes a privilege level as part of its access type |
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* markings, and certain devices are capable of issuing transactions marked as |
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* either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other |
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* given permission flags only apply to accesses at the higher privilege level, |
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* and that unprivileged transactions should have as little access as possible. |
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* This would usually imply the same permissions as kernel mappings on the CPU, |
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* if the IOMMU page table format is equivalent. |
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*/ |
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#define IOMMU_PRIV (1 << 5) |
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struct iommu_ops; |
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struct iommu_group; |
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struct bus_type; |
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struct device; |
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struct iommu_domain; |
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struct iommu_domain_ops; |
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struct notifier_block; |
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struct iommu_sva; |
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struct iommu_fault_event; |
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struct iommu_dma_cookie; |
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/* iommu fault flags */ |
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#define IOMMU_FAULT_READ 0x0 |
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#define IOMMU_FAULT_WRITE 0x1 |
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typedef int (*iommu_fault_handler_t)(struct iommu_domain *, |
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struct device *, unsigned long, int, void *); |
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typedef int (*iommu_dev_fault_handler_t)(struct iommu_fault *, void *); |
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struct iommu_domain_geometry { |
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dma_addr_t aperture_start; /* First address that can be mapped */ |
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dma_addr_t aperture_end; /* Last address that can be mapped */ |
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bool force_aperture; /* DMA only allowed in mappable range? */ |
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}; |
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/* Domain feature flags */ |
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#define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */ |
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#define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API |
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implementation */ |
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#define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */ |
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#define __IOMMU_DOMAIN_DMA_FQ (1U << 3) /* DMA-API uses flush queue */ |
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/* |
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* This are the possible domain-types |
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* |
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* IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate |
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* devices |
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* IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses |
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* IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used |
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* for VMs |
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* IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations. |
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* This flag allows IOMMU drivers to implement |
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* certain optimizations for these domains |
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* IOMMU_DOMAIN_DMA_FQ - As above, but definitely using batched TLB |
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* invalidation. |
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*/ |
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#define IOMMU_DOMAIN_BLOCKED (0U) |
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#define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT) |
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#define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING) |
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#define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \ |
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__IOMMU_DOMAIN_DMA_API) |
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#define IOMMU_DOMAIN_DMA_FQ (__IOMMU_DOMAIN_PAGING | \ |
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__IOMMU_DOMAIN_DMA_API | \ |
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__IOMMU_DOMAIN_DMA_FQ) |
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struct iommu_domain { |
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unsigned type; |
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const struct iommu_domain_ops *ops; |
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unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */ |
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iommu_fault_handler_t handler; |
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void *handler_token; |
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struct iommu_domain_geometry geometry; |
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struct iommu_dma_cookie *iova_cookie; |
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}; |
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static inline bool iommu_is_dma_domain(struct iommu_domain *domain) |
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{ |
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return domain->type & __IOMMU_DOMAIN_DMA_API; |
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} |
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enum iommu_cap { |
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IOMMU_CAP_CACHE_COHERENCY, /* IOMMU_CACHE is supported */ |
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IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */ |
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IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */ |
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IOMMU_CAP_PRE_BOOT_PROTECTION, /* Firmware says it used the IOMMU for |
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DMA protection and we should too */ |
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}; |
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/* These are the possible reserved region types */ |
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enum iommu_resv_type { |
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/* Memory regions which must be mapped 1:1 at all times */ |
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IOMMU_RESV_DIRECT, |
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/* |
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* Memory regions which are advertised to be 1:1 but are |
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* commonly considered relaxable in some conditions, |
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* for instance in device assignment use case (USB, Graphics) |
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*/ |
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IOMMU_RESV_DIRECT_RELAXABLE, |
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/* Arbitrary "never map this or give it to a device" address ranges */ |
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IOMMU_RESV_RESERVED, |
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/* Hardware MSI region (untranslated) */ |
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IOMMU_RESV_MSI, |
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/* Software-managed MSI translation window */ |
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IOMMU_RESV_SW_MSI, |
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}; |
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/** |
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* struct iommu_resv_region - descriptor for a reserved memory region |
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* @list: Linked list pointers |
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* @start: System physical start address of the region |
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* @length: Length of the region in bytes |
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* @prot: IOMMU Protection flags (READ/WRITE/...) |
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* @type: Type of the reserved region |
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* @free: Callback to free associated memory allocations |
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*/ |
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struct iommu_resv_region { |
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struct list_head list; |
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phys_addr_t start; |
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size_t length; |
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int prot; |
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enum iommu_resv_type type; |
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void (*free)(struct device *dev, struct iommu_resv_region *region); |
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}; |
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struct iommu_iort_rmr_data { |
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struct iommu_resv_region rr; |
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/* Stream IDs associated with IORT RMR entry */ |
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const u32 *sids; |
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u32 num_sids; |
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}; |
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/** |
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* enum iommu_dev_features - Per device IOMMU features |
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* @IOMMU_DEV_FEAT_SVA: Shared Virtual Addresses |
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* @IOMMU_DEV_FEAT_IOPF: I/O Page Faults such as PRI or Stall. Generally |
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* enabling %IOMMU_DEV_FEAT_SVA requires |
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* %IOMMU_DEV_FEAT_IOPF, but some devices manage I/O Page |
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* Faults themselves instead of relying on the IOMMU. When |
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* supported, this feature must be enabled before and |
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* disabled after %IOMMU_DEV_FEAT_SVA. |
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* |
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* Device drivers enable a feature using iommu_dev_enable_feature(). |
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*/ |
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enum iommu_dev_features { |
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IOMMU_DEV_FEAT_SVA, |
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IOMMU_DEV_FEAT_IOPF, |
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}; |
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#define IOMMU_PASID_INVALID (-1U) |
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#ifdef CONFIG_IOMMU_API |
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/** |
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* struct iommu_iotlb_gather - Range information for a pending IOTLB flush |
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* |
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* @start: IOVA representing the start of the range to be flushed |
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* @end: IOVA representing the end of the range to be flushed (inclusive) |
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* @pgsize: The interval at which to perform the flush |
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* @freelist: Removed pages to free after sync |
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* @queued: Indicates that the flush will be queued |
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* |
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* This structure is intended to be updated by multiple calls to the |
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* ->unmap() function in struct iommu_ops before eventually being passed |
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* into ->iotlb_sync(). Drivers can add pages to @freelist to be freed after |
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* ->iotlb_sync() or ->iotlb_flush_all() have cleared all cached references to |
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* them. @queued is set to indicate when ->iotlb_flush_all() will be called |
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* later instead of ->iotlb_sync(), so drivers may optimise accordingly. |
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*/ |
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struct iommu_iotlb_gather { |
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unsigned long start; |
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unsigned long end; |
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size_t pgsize; |
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struct list_head freelist; |
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bool queued; |
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}; |
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/** |
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* struct iommu_ops - iommu ops and capabilities |
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* @capable: check capability |
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* @domain_alloc: allocate iommu domain |
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* @probe_device: Add device to iommu driver handling |
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* @release_device: Remove device from iommu driver handling |
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* @probe_finalize: Do final setup work after the device is added to an IOMMU |
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* group and attached to the groups domain |
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* @device_group: find iommu group for a particular device |
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* @get_resv_regions: Request list of reserved regions for a device |
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* @of_xlate: add OF master IDs to iommu grouping |
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* @is_attach_deferred: Check if domain attach should be deferred from iommu |
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* driver init to device driver init (default no) |
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* @dev_has/enable/disable_feat: per device entries to check/enable/disable |
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* iommu specific features. |
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* @sva_bind: Bind process address space to device |
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* @sva_unbind: Unbind process address space from device |
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* @sva_get_pasid: Get PASID associated to a SVA handle |
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* @page_response: handle page request response |
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* @def_domain_type: device default domain type, return value: |
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* - IOMMU_DOMAIN_IDENTITY: must use an identity domain |
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* - IOMMU_DOMAIN_DMA: must use a dma domain |
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* - 0: use the default setting |
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* @default_domain_ops: the default ops for domains |
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* @pgsize_bitmap: bitmap of all possible supported page sizes |
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* @owner: Driver module providing these ops |
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*/ |
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struct iommu_ops { |
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bool (*capable)(enum iommu_cap); |
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/* Domain allocation and freeing by the iommu driver */ |
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struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type); |
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struct iommu_device *(*probe_device)(struct device *dev); |
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void (*release_device)(struct device *dev); |
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void (*probe_finalize)(struct device *dev); |
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struct iommu_group *(*device_group)(struct device *dev); |
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/* Request/Free a list of reserved regions for a device */ |
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void (*get_resv_regions)(struct device *dev, struct list_head *list); |
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int (*of_xlate)(struct device *dev, struct of_phandle_args *args); |
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bool (*is_attach_deferred)(struct device *dev); |
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/* Per device IOMMU features */ |
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int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f); |
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int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f); |
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struct iommu_sva *(*sva_bind)(struct device *dev, struct mm_struct *mm, |
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void *drvdata); |
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void (*sva_unbind)(struct iommu_sva *handle); |
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u32 (*sva_get_pasid)(struct iommu_sva *handle); |
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int (*page_response)(struct device *dev, |
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struct iommu_fault_event *evt, |
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struct iommu_page_response *msg); |
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int (*def_domain_type)(struct device *dev); |
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const struct iommu_domain_ops *default_domain_ops; |
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unsigned long pgsize_bitmap; |
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struct module *owner; |
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}; |
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/** |
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* struct iommu_domain_ops - domain specific operations |
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* @attach_dev: attach an iommu domain to a device |
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* @detach_dev: detach an iommu domain from a device |
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* @map: map a physically contiguous memory region to an iommu domain |
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* @map_pages: map a physically contiguous set of pages of the same size to |
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* an iommu domain. |
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* @unmap: unmap a physically contiguous memory region from an iommu domain |
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* @unmap_pages: unmap a number of pages of the same size from an iommu domain |
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* @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain |
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* @iotlb_sync_map: Sync mappings created recently using @map to the hardware |
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* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush |
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* queue |
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* @iova_to_phys: translate iova to physical address |
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* @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE, |
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* including no-snoop TLPs on PCIe or other platform |
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* specific mechanisms. |
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* @enable_nesting: Enable nesting |
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* @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*) |
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* @free: Release the domain after use. |
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*/ |
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struct iommu_domain_ops { |
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int (*attach_dev)(struct iommu_domain *domain, struct device *dev); |
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void (*detach_dev)(struct iommu_domain *domain, struct device *dev); |
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int (*map)(struct iommu_domain *domain, unsigned long iova, |
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phys_addr_t paddr, size_t size, int prot, gfp_t gfp); |
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int (*map_pages)(struct iommu_domain *domain, unsigned long iova, |
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phys_addr_t paddr, size_t pgsize, size_t pgcount, |
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int prot, gfp_t gfp, size_t *mapped); |
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size_t (*unmap)(struct iommu_domain *domain, unsigned long iova, |
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size_t size, struct iommu_iotlb_gather *iotlb_gather); |
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size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova, |
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size_t pgsize, size_t pgcount, |
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struct iommu_iotlb_gather *iotlb_gather); |
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void (*flush_iotlb_all)(struct iommu_domain *domain); |
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void (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova, |
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size_t size); |
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void (*iotlb_sync)(struct iommu_domain *domain, |
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struct iommu_iotlb_gather *iotlb_gather); |
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phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, |
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dma_addr_t iova); |
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bool (*enforce_cache_coherency)(struct iommu_domain *domain); |
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int (*enable_nesting)(struct iommu_domain *domain); |
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int (*set_pgtable_quirks)(struct iommu_domain *domain, |
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unsigned long quirks); |
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void (*free)(struct iommu_domain *domain); |
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}; |
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/** |
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* struct iommu_device - IOMMU core representation of one IOMMU hardware |
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* instance |
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* @list: Used by the iommu-core to keep a list of registered iommus |
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* @ops: iommu-ops for talking to this iommu |
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* @dev: struct device for sysfs handling |
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*/ |
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struct iommu_device { |
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struct list_head list; |
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const struct iommu_ops *ops; |
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struct fwnode_handle *fwnode; |
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struct device *dev; |
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}; |
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/** |
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* struct iommu_fault_event - Generic fault event |
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* |
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* Can represent recoverable faults such as a page requests or |
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* unrecoverable faults such as DMA or IRQ remapping faults. |
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* |
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* @fault: fault descriptor |
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* @list: pending fault event list, used for tracking responses |
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*/ |
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struct iommu_fault_event { |
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struct iommu_fault fault; |
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struct list_head list; |
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}; |
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/** |
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* struct iommu_fault_param - per-device IOMMU fault data |
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* @handler: Callback function to handle IOMMU faults at device level |
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* @data: handler private data |
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* @faults: holds the pending faults which needs response |
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* @lock: protect pending faults list |
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*/ |
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struct iommu_fault_param { |
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iommu_dev_fault_handler_t handler; |
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void *data; |
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struct list_head faults; |
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struct mutex lock; |
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}; |
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/** |
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* struct dev_iommu - Collection of per-device IOMMU data |
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* |
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* @fault_param: IOMMU detected device fault reporting data |
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* @iopf_param: I/O Page Fault queue and data |
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* @fwspec: IOMMU fwspec data |
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* @iommu_dev: IOMMU device this device is linked to |
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* @priv: IOMMU Driver private data |
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* |
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* TODO: migrate other per device data pointers under iommu_dev_data, e.g. |
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* struct iommu_group *iommu_group; |
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*/ |
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struct dev_iommu { |
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struct mutex lock; |
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struct iommu_fault_param *fault_param; |
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struct iopf_device_param *iopf_param; |
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struct iommu_fwspec *fwspec; |
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struct iommu_device *iommu_dev; |
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void *priv; |
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}; |
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int iommu_device_register(struct iommu_device *iommu, |
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const struct iommu_ops *ops, |
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struct device *hwdev); |
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void iommu_device_unregister(struct iommu_device *iommu); |
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int iommu_device_sysfs_add(struct iommu_device *iommu, |
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struct device *parent, |
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const struct attribute_group **groups, |
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const char *fmt, ...) __printf(4, 5); |
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void iommu_device_sysfs_remove(struct iommu_device *iommu); |
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int iommu_device_link(struct iommu_device *iommu, struct device *link); |
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void iommu_device_unlink(struct iommu_device *iommu, struct device *link); |
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int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain); |
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static inline struct iommu_device *dev_to_iommu_device(struct device *dev) |
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{ |
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return (struct iommu_device *)dev_get_drvdata(dev); |
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} |
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static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather) |
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{ |
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*gather = (struct iommu_iotlb_gather) { |
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.start = ULONG_MAX, |
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.freelist = LIST_HEAD_INIT(gather->freelist), |
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}; |
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} |
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static inline const struct iommu_ops *dev_iommu_ops(struct device *dev) |
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{ |
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/* |
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* Assume that valid ops must be installed if iommu_probe_device() |
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* has succeeded. The device ops are essentially for internal use |
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* within the IOMMU subsystem itself, so we should be able to trust |
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* ourselves not to misuse the helper. |
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*/ |
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return dev->iommu->iommu_dev->ops; |
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} |
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extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops); |
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extern int bus_iommu_probe(struct bus_type *bus); |
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extern bool iommu_present(struct bus_type *bus); |
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extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap); |
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extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap); |
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extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus); |
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extern struct iommu_group *iommu_group_get_by_id(int id); |
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extern void iommu_domain_free(struct iommu_domain *domain); |
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extern int iommu_attach_device(struct iommu_domain *domain, |
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struct device *dev); |
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extern void iommu_detach_device(struct iommu_domain *domain, |
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struct device *dev); |
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extern int iommu_sva_unbind_gpasid(struct iommu_domain *domain, |
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struct device *dev, ioasid_t pasid); |
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extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev); |
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extern struct iommu_domain *iommu_get_dma_domain(struct device *dev); |
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extern int iommu_map(struct iommu_domain *domain, unsigned long iova, |
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phys_addr_t paddr, size_t size, int prot); |
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extern int iommu_map_atomic(struct iommu_domain *domain, unsigned long iova, |
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phys_addr_t paddr, size_t size, int prot); |
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extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova, |
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size_t size); |
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extern size_t iommu_unmap_fast(struct iommu_domain *domain, |
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unsigned long iova, size_t size, |
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struct iommu_iotlb_gather *iotlb_gather); |
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extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova, |
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struct scatterlist *sg, unsigned int nents, int prot); |
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extern ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, |
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unsigned long iova, struct scatterlist *sg, |
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unsigned int nents, int prot); |
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extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova); |
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extern void iommu_set_fault_handler(struct iommu_domain *domain, |
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iommu_fault_handler_t handler, void *token); |
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extern void iommu_get_resv_regions(struct device *dev, struct list_head *list); |
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extern void iommu_put_resv_regions(struct device *dev, struct list_head *list); |
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extern void iommu_set_default_passthrough(bool cmd_line); |
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extern void iommu_set_default_translated(bool cmd_line); |
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extern bool iommu_default_passthrough(void); |
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extern struct iommu_resv_region * |
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iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot, |
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enum iommu_resv_type type); |
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extern int iommu_get_group_resv_regions(struct iommu_group *group, |
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struct list_head *head); |
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extern int iommu_attach_group(struct iommu_domain *domain, |
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struct iommu_group *group); |
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extern void iommu_detach_group(struct iommu_domain *domain, |
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struct iommu_group *group); |
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extern struct iommu_group *iommu_group_alloc(void); |
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extern void *iommu_group_get_iommudata(struct iommu_group *group); |
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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_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 *); |
|
|
|
int iommu_enable_nesting(struct iommu_domain *domain); |
|
int iommu_set_pgtable_quirks(struct iommu_domain *domain, |
|
unsigned long quirks); |
|
|
|
void iommu_set_dma_strict(void); |
|
|
|
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); |
|
} |
|
|
|
/** |
|
* iommu_iotlb_gather_is_disjoint - Checks whether a new range is disjoint |
|
* |
|
* @gather: TLB gather data |
|
* @iova: start of page to invalidate |
|
* @size: size of page to invalidate |
|
* |
|
* Helper for IOMMU drivers to check whether a new range and the gathered range |
|
* are disjoint. For many IOMMUs, flushing the IOMMU in this case is better |
|
* than merging the two, which might lead to unnecessary invalidations. |
|
*/ |
|
static inline |
|
bool iommu_iotlb_gather_is_disjoint(struct iommu_iotlb_gather *gather, |
|
unsigned long iova, size_t size) |
|
{ |
|
unsigned long start = iova, end = start + size - 1; |
|
|
|
return gather->end != 0 && |
|
(end + 1 < gather->start || start > gather->end + 1); |
|
} |
|
|
|
|
|
/** |
|
* iommu_iotlb_gather_add_range - Gather for address-based TLB invalidation |
|
* @gather: TLB gather data |
|
* @iova: start of page to invalidate |
|
* @size: size of page to invalidate |
|
* |
|
* Helper for IOMMU drivers to build arbitrarily-sized invalidation commands |
|
* where only the address range matters, and simply minimising intermediate |
|
* syncs is preferred. |
|
*/ |
|
static inline void iommu_iotlb_gather_add_range(struct iommu_iotlb_gather *gather, |
|
unsigned long iova, size_t size) |
|
{ |
|
unsigned long end = iova + size - 1; |
|
|
|
if (gather->start > iova) |
|
gather->start = iova; |
|
if (gather->end < end) |
|
gather->end = end; |
|
} |
|
|
|
/** |
|
* iommu_iotlb_gather_add_page - Gather for page-based TLB invalidation |
|
* @domain: IOMMU domain to be invalidated |
|
* @gather: TLB gather data |
|
* @iova: start of page to invalidate |
|
* @size: size of page to invalidate |
|
* |
|
* Helper for IOMMU drivers to build invalidation commands based on individual |
|
* pages, or with page size/table level hints which cannot be gathered if they |
|
* differ. |
|
*/ |
|
static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, |
|
struct iommu_iotlb_gather *gather, |
|
unsigned long iova, size_t 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 && gather->pgsize != size) || |
|
iommu_iotlb_gather_is_disjoint(gather, iova, size)) |
|
iommu_iotlb_sync(domain, gather); |
|
|
|
gather->pgsize = size; |
|
iommu_iotlb_gather_add_range(gather, iova, size); |
|
} |
|
|
|
static inline bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather) |
|
{ |
|
return gather && gather->queued; |
|
} |
|
|
|
/* 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 |
|
* @flags: IOMMU_FWSPEC_* flags |
|
* @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; |
|
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); |
|
|
|
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); |
|
|
|
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); |
|
|
|
int iommu_device_use_default_domain(struct device *dev); |
|
void iommu_device_unuse_default_domain(struct device *dev); |
|
|
|
int iommu_group_claim_dma_owner(struct iommu_group *group, void *owner); |
|
void iommu_group_release_dma_owner(struct iommu_group *group); |
|
bool iommu_group_dma_owner_claimed(struct iommu_group *group); |
|
|
|
#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 device_iommu_capable(struct device *dev, enum iommu_cap cap) |
|
{ |
|
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 ssize_t iommu_map_sg(struct iommu_domain *domain, |
|
unsigned long iova, struct scatterlist *sg, |
|
unsigned int nents, int prot) |
|
{ |
|
return -ENODEV; |
|
} |
|
|
|
static inline ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, |
|
unsigned long iova, struct scatterlist *sg, |
|
unsigned int nents, int prot) |
|
{ |
|
return -ENODEV; |
|
} |
|
|
|
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 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_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_set_pgtable_quirks(struct iommu_domain *domain, |
|
unsigned long quirks) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline int iommu_device_register(struct iommu_device *iommu, |
|
const struct iommu_ops *ops, |
|
struct device *hwdev) |
|
{ |
|
return -ENODEV; |
|
} |
|
|
|
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 bool iommu_iotlb_gather_queued(struct iommu_iotlb_gather *gather) |
|
{ |
|
return false; |
|
} |
|
|
|
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 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 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 struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static inline int iommu_device_use_default_domain(struct device *dev) |
|
{ |
|
return 0; |
|
} |
|
|
|
static inline void iommu_device_unuse_default_domain(struct device *dev) |
|
{ |
|
} |
|
|
|
static inline int |
|
iommu_group_claim_dma_owner(struct iommu_group *group, void *owner) |
|
{ |
|
return -ENODEV; |
|
} |
|
|
|
static inline void iommu_group_release_dma_owner(struct iommu_group *group) |
|
{ |
|
} |
|
|
|
static inline bool iommu_group_dma_owner_claimed(struct iommu_group *group) |
|
{ |
|
return false; |
|
} |
|
#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 |
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static inline void iommu_debugfs_setup(void) {} |
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#endif |
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#endif /* __LINUX_IOMMU_H */
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