forked from mirrors/linux
64e6fc27d6
Change the driver callback op domain_alloc_user() into two ops domain_alloc_paging_flags() and domain_alloc_nesting() that better describe what the ops are expected to do. There will be per-driver cleanup based on this going into the next cycle via the driver trees. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRRRCHOFoQz/8F5bUaFwuHvBreFYQUCZ0c+GQAKCRCFwuHvBreF YVJXAP97zriu5x9AVNzG6mLOOYYROuhCTXGieKPqNg/apGOyogD/cMuMql3w86h+ oBIMai6GaTBUU+Ie8S07PM0849TpLgA= =yyYk -----END PGP SIGNATURE----- Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd Pull more iommufd updates from Jason Gunthorpe: "Change the driver callback op domain_alloc_user() into two ops: domain_alloc_paging_flags() and domain_alloc_nesting() that better describe what the ops are expected to do. There will be per-driver cleanup based on this going into the next cycle via the driver trees" * tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd: iommu: Rename ops->domain_alloc_user() to domain_alloc_paging_flags() iommu: Add ops->domain_alloc_nested()
1675 lines
54 KiB
C
1675 lines
54 KiB
C
/* 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 <joerg.roedel@amd.com>
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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/iova_bitmap.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 iommu_dirty_ops;
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struct notifier_block;
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struct iommu_sva;
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struct iommu_dma_cookie;
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struct iommu_fault_param;
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struct iommufd_ctx;
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struct iommufd_viommu;
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#define IOMMU_FAULT_PERM_READ (1 << 0) /* read */
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#define IOMMU_FAULT_PERM_WRITE (1 << 1) /* write */
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#define IOMMU_FAULT_PERM_EXEC (1 << 2) /* exec */
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#define IOMMU_FAULT_PERM_PRIV (1 << 3) /* privileged */
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/* Generic fault types, can be expanded IRQ remapping fault */
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enum iommu_fault_type {
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IOMMU_FAULT_PAGE_REQ = 1, /* page request fault */
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};
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/**
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* struct iommu_fault_page_request - Page Request data
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* @flags: encodes whether the corresponding fields are valid and whether this
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* is the last page in group (IOMMU_FAULT_PAGE_REQUEST_* values).
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* When IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID is set, the page response
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* must have the same PASID value as the page request. When it is clear,
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* the page response should not have a PASID.
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* @pasid: Process Address Space ID
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* @grpid: Page Request Group Index
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* @perm: requested page permissions (IOMMU_FAULT_PERM_* values)
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* @addr: page address
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* @private_data: device-specific private information
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*/
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struct iommu_fault_page_request {
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#define IOMMU_FAULT_PAGE_REQUEST_PASID_VALID (1 << 0)
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#define IOMMU_FAULT_PAGE_REQUEST_LAST_PAGE (1 << 1)
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#define IOMMU_FAULT_PAGE_RESPONSE_NEEDS_PASID (1 << 2)
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u32 flags;
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u32 pasid;
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u32 grpid;
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u32 perm;
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u64 addr;
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u64 private_data[2];
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};
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/**
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* struct iommu_fault - Generic fault data
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* @type: fault type from &enum iommu_fault_type
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* @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ
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*/
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struct iommu_fault {
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u32 type;
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struct iommu_fault_page_request prm;
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};
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/**
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* enum iommu_page_response_code - Return status of fault handlers
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* @IOMMU_PAGE_RESP_SUCCESS: Fault has been handled and the page tables
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* populated, retry the access. This is "Success" in PCI PRI.
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* @IOMMU_PAGE_RESP_FAILURE: General error. Drop all subsequent faults from
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* this device if possible. This is "Response Failure" in PCI PRI.
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* @IOMMU_PAGE_RESP_INVALID: Could not handle this fault, don't retry the
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* access. This is "Invalid Request" in PCI PRI.
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*/
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enum iommu_page_response_code {
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IOMMU_PAGE_RESP_SUCCESS = 0,
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IOMMU_PAGE_RESP_INVALID,
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IOMMU_PAGE_RESP_FAILURE,
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};
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/**
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* struct iommu_page_response - Generic page response information
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* @pasid: Process Address Space ID
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* @grpid: Page Request Group Index
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* @code: response code from &enum iommu_page_response_code
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*/
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struct iommu_page_response {
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u32 pasid;
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u32 grpid;
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u32 code;
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};
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struct iopf_fault {
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struct iommu_fault fault;
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/* node for pending lists */
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struct list_head list;
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};
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struct iopf_group {
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struct iopf_fault last_fault;
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struct list_head faults;
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size_t fault_count;
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/* list node for iommu_fault_param::faults */
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struct list_head pending_node;
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struct work_struct work;
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struct iommu_attach_handle *attach_handle;
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/* The device's fault data parameter. */
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struct iommu_fault_param *fault_param;
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/* Used by handler provider to hook the group on its own lists. */
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struct list_head node;
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u32 cookie;
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};
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/**
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* struct iopf_queue - IO Page Fault queue
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* @wq: the fault workqueue
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* @devices: devices attached to this queue
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* @lock: protects the device list
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*/
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struct iopf_queue {
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struct workqueue_struct *wq;
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struct list_head devices;
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struct mutex lock;
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};
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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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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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#define __IOMMU_DOMAIN_SVA (1U << 4) /* Shared process address space */
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#define __IOMMU_DOMAIN_PLATFORM (1U << 5)
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#define __IOMMU_DOMAIN_NESTED (1U << 6) /* User-managed address space nested
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on a stage-2 translation */
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#define IOMMU_DOMAIN_ALLOC_FLAGS ~__IOMMU_DOMAIN_DMA_FQ
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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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* IOMMU_DOMAIN_SVA - DMA addresses are shared process addresses
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* represented by mm_struct's.
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* IOMMU_DOMAIN_PLATFORM - Legacy domain for drivers that do their own
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* dma_api stuff. Do not use in new drivers.
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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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#define IOMMU_DOMAIN_SVA (__IOMMU_DOMAIN_SVA)
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#define IOMMU_DOMAIN_PLATFORM (__IOMMU_DOMAIN_PLATFORM)
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#define IOMMU_DOMAIN_NESTED (__IOMMU_DOMAIN_NESTED)
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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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const struct iommu_dirty_ops *dirty_ops;
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const struct iommu_ops *owner; /* Whose domain_alloc we came from */
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unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
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struct iommu_domain_geometry geometry;
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struct iommu_dma_cookie *iova_cookie;
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int (*iopf_handler)(struct iopf_group *group);
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void *fault_data;
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union {
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struct {
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iommu_fault_handler_t handler;
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void *handler_token;
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};
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struct { /* IOMMU_DOMAIN_SVA */
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struct mm_struct *mm;
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int users;
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/*
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* Next iommu_domain in mm->iommu_mm->sva-domains list
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* protected by iommu_sva_lock.
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*/
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struct list_head next;
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};
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};
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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_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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* Per-device flag indicating if enforce_cache_coherency() will work on
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* this device.
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*/
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IOMMU_CAP_ENFORCE_CACHE_COHERENCY,
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/*
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* IOMMU driver does not issue TLB maintenance during .unmap, so can
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* usefully support the non-strict DMA flush queue.
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*/
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IOMMU_CAP_DEFERRED_FLUSH,
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IOMMU_CAP_DIRTY_TRACKING, /* IOMMU supports dirty tracking */
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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_NO_PASID (0U) /* Reserved for DMA w/o PASID */
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#define IOMMU_FIRST_GLOBAL_PASID (1U) /*starting range for allocation */
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#define IOMMU_PASID_INVALID (-1U)
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typedef unsigned int ioasid_t;
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/* Read but do not clear any dirty bits */
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#define IOMMU_DIRTY_NO_CLEAR (1 << 0)
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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_dirty_bitmap - Dirty IOVA bitmap state
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* @bitmap: IOVA bitmap
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* @gather: Range information for a pending IOTLB flush
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*/
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struct iommu_dirty_bitmap {
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struct iova_bitmap *bitmap;
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struct iommu_iotlb_gather *gather;
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};
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/**
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* struct iommu_dirty_ops - domain specific dirty tracking operations
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* @set_dirty_tracking: Enable or Disable dirty tracking on the iommu domain
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* @read_and_clear_dirty: Walk IOMMU page tables for dirtied PTEs marshalled
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* into a bitmap, with a bit represented as a page.
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* Reads the dirty PTE bits and clears it from IO
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* pagetables.
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*/
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struct iommu_dirty_ops {
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int (*set_dirty_tracking)(struct iommu_domain *domain, bool enabled);
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int (*read_and_clear_dirty)(struct iommu_domain *domain,
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unsigned long iova, size_t size,
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unsigned long flags,
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struct iommu_dirty_bitmap *dirty);
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};
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/**
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* struct iommu_user_data - iommu driver specific user space data info
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* @type: The data type of the user buffer
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* @uptr: Pointer to the user buffer for copy_from_user()
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* @len: The length of the user buffer in bytes
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*
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* A user space data is an uAPI that is defined in include/uapi/linux/iommufd.h
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* @type, @uptr and @len should be just copied from an iommufd core uAPI struct.
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*/
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struct iommu_user_data {
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unsigned int type;
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void __user *uptr;
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size_t len;
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};
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/**
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* struct iommu_user_data_array - iommu driver specific user space data array
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* @type: The data type of all the entries in the user buffer array
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* @uptr: Pointer to the user buffer array
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* @entry_len: The fixed-width length of an entry in the array, in bytes
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* @entry_num: The number of total entries in the array
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*
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* The user buffer includes an array of requests with format defined in
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* include/uapi/linux/iommufd.h
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*/
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struct iommu_user_data_array {
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unsigned int type;
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void __user *uptr;
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size_t entry_len;
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u32 entry_num;
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};
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/**
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* __iommu_copy_struct_from_user - Copy iommu driver specific user space data
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* @dst_data: Pointer to an iommu driver specific user data that is defined in
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* include/uapi/linux/iommufd.h
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* @src_data: Pointer to a struct iommu_user_data for user space data info
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* @data_type: The data type of the @dst_data. Must match with @src_data.type
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* @data_len: Length of current user data structure, i.e. sizeof(struct _dst)
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* @min_len: Initial length of user data structure for backward compatibility.
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* This should be offsetofend using the last member in the user data
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* struct that was initially added to include/uapi/linux/iommufd.h
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*/
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static inline int __iommu_copy_struct_from_user(
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void *dst_data, const struct iommu_user_data *src_data,
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unsigned int data_type, size_t data_len, size_t min_len)
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{
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if (src_data->type != data_type)
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return -EINVAL;
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if (WARN_ON(!dst_data || !src_data))
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return -EINVAL;
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if (src_data->len < min_len || data_len < src_data->len)
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return -EINVAL;
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return copy_struct_from_user(dst_data, data_len, src_data->uptr,
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src_data->len);
|
|
}
|
|
|
|
/**
|
|
* iommu_copy_struct_from_user - Copy iommu driver specific user space data
|
|
* @kdst: Pointer to an iommu driver specific user data that is defined in
|
|
* include/uapi/linux/iommufd.h
|
|
* @user_data: Pointer to a struct iommu_user_data for user space data info
|
|
* @data_type: The data type of the @kdst. Must match with @user_data->type
|
|
* @min_last: The last memember of the data structure @kdst points in the
|
|
* initial version.
|
|
* Return 0 for success, otherwise -error.
|
|
*/
|
|
#define iommu_copy_struct_from_user(kdst, user_data, data_type, min_last) \
|
|
__iommu_copy_struct_from_user(kdst, user_data, data_type, \
|
|
sizeof(*kdst), \
|
|
offsetofend(typeof(*kdst), min_last))
|
|
|
|
/**
|
|
* __iommu_copy_struct_from_user_array - Copy iommu driver specific user space
|
|
* data from an iommu_user_data_array
|
|
* @dst_data: Pointer to an iommu driver specific user data that is defined in
|
|
* include/uapi/linux/iommufd.h
|
|
* @src_array: Pointer to a struct iommu_user_data_array for a user space array
|
|
* @data_type: The data type of the @dst_data. Must match with @src_array.type
|
|
* @index: Index to the location in the array to copy user data from
|
|
* @data_len: Length of current user data structure, i.e. sizeof(struct _dst)
|
|
* @min_len: Initial length of user data structure for backward compatibility.
|
|
* This should be offsetofend using the last member in the user data
|
|
* struct that was initially added to include/uapi/linux/iommufd.h
|
|
*/
|
|
static inline int __iommu_copy_struct_from_user_array(
|
|
void *dst_data, const struct iommu_user_data_array *src_array,
|
|
unsigned int data_type, unsigned int index, size_t data_len,
|
|
size_t min_len)
|
|
{
|
|
struct iommu_user_data src_data;
|
|
|
|
if (WARN_ON(!src_array || index >= src_array->entry_num))
|
|
return -EINVAL;
|
|
if (!src_array->entry_num)
|
|
return -EINVAL;
|
|
src_data.uptr = src_array->uptr + src_array->entry_len * index;
|
|
src_data.len = src_array->entry_len;
|
|
src_data.type = src_array->type;
|
|
|
|
return __iommu_copy_struct_from_user(dst_data, &src_data, data_type,
|
|
data_len, min_len);
|
|
}
|
|
|
|
/**
|
|
* iommu_copy_struct_from_user_array - Copy iommu driver specific user space
|
|
* data from an iommu_user_data_array
|
|
* @kdst: Pointer to an iommu driver specific user data that is defined in
|
|
* include/uapi/linux/iommufd.h
|
|
* @user_array: Pointer to a struct iommu_user_data_array for a user space
|
|
* array
|
|
* @data_type: The data type of the @kdst. Must match with @user_array->type
|
|
* @index: Index to the location in the array to copy user data from
|
|
* @min_last: The last member of the data structure @kdst points in the
|
|
* initial version.
|
|
*
|
|
* Copy a single entry from a user array. Return 0 for success, otherwise
|
|
* -error.
|
|
*/
|
|
#define iommu_copy_struct_from_user_array(kdst, user_array, data_type, index, \
|
|
min_last) \
|
|
__iommu_copy_struct_from_user_array( \
|
|
kdst, user_array, data_type, index, sizeof(*(kdst)), \
|
|
offsetofend(typeof(*(kdst)), min_last))
|
|
|
|
/**
|
|
* iommu_copy_struct_from_full_user_array - Copy iommu driver specific user
|
|
* space data from an iommu_user_data_array
|
|
* @kdst: Pointer to an iommu driver specific user data that is defined in
|
|
* include/uapi/linux/iommufd.h
|
|
* @kdst_entry_size: sizeof(*kdst)
|
|
* @user_array: Pointer to a struct iommu_user_data_array for a user space
|
|
* array
|
|
* @data_type: The data type of the @kdst. Must match with @user_array->type
|
|
*
|
|
* Copy the entire user array. kdst must have room for kdst_entry_size *
|
|
* user_array->entry_num bytes. Return 0 for success, otherwise -error.
|
|
*/
|
|
static inline int
|
|
iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size,
|
|
struct iommu_user_data_array *user_array,
|
|
unsigned int data_type)
|
|
{
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
if (user_array->type != data_type)
|
|
return -EINVAL;
|
|
if (!user_array->entry_num)
|
|
return -EINVAL;
|
|
if (likely(user_array->entry_len == kdst_entry_size)) {
|
|
if (copy_from_user(kdst, user_array->uptr,
|
|
user_array->entry_num *
|
|
user_array->entry_len))
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Copy item by item */
|
|
for (i = 0; i != user_array->entry_num; i++) {
|
|
ret = copy_struct_from_user(
|
|
kdst + kdst_entry_size * i, kdst_entry_size,
|
|
user_array->uptr + user_array->entry_len * i,
|
|
user_array->entry_len);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* struct iommu_ops - iommu ops and capabilities
|
|
* @capable: check capability
|
|
* @hw_info: report iommu hardware information. The data buffer returned by this
|
|
* op is allocated in the iommu driver and freed by the caller after
|
|
* use. The information type is one of enum iommu_hw_info_type defined
|
|
* in include/uapi/linux/iommufd.h.
|
|
* @domain_alloc: allocate and return an iommu domain if success. Otherwise
|
|
* NULL is returned. The domain is not fully initialized until
|
|
* the caller iommu_domain_alloc() returns.
|
|
* @domain_alloc_paging_flags: Allocate an iommu domain corresponding to the
|
|
* input parameters as defined in
|
|
* include/uapi/linux/iommufd.h. The @user_data can be
|
|
* optionally provided, the new domain must support
|
|
* __IOMMU_DOMAIN_PAGING. Upon failure, ERR_PTR must be
|
|
* returned.
|
|
* @domain_alloc_paging: Allocate an iommu_domain that can be used for
|
|
* UNMANAGED, DMA, and DMA_FQ domain types. This is the
|
|
* same as invoking domain_alloc_paging_flags() with
|
|
* @flags=0, @user_data=NULL. A driver should implement
|
|
* only one of the two ops.
|
|
* @domain_alloc_sva: Allocate an iommu_domain for Shared Virtual Addressing.
|
|
* @domain_alloc_nested: Allocate an iommu_domain for nested translation.
|
|
* @probe_device: Add device to iommu driver handling
|
|
* @release_device: Remove device from iommu driver handling
|
|
* @probe_finalize: Do final setup work after the device is added to an IOMMU
|
|
* group and attached to the groups domain
|
|
* @device_group: find iommu group for a particular device
|
|
* @get_resv_regions: Request list of reserved regions for a device
|
|
* @of_xlate: add OF master IDs to iommu grouping
|
|
* @is_attach_deferred: Check if domain attach should be deferred from iommu
|
|
* driver init to device driver init (default no)
|
|
* @dev_enable/disable_feat: per device entries to enable/disable
|
|
* iommu specific features.
|
|
* @page_response: handle page request response
|
|
* @def_domain_type: device default domain type, return value:
|
|
* - IOMMU_DOMAIN_IDENTITY: must use an identity domain
|
|
* - IOMMU_DOMAIN_DMA: must use a dma domain
|
|
* - 0: use the default setting
|
|
* @default_domain_ops: the default ops for domains
|
|
* @remove_dev_pasid: Remove any translation configurations of a specific
|
|
* pasid, so that any DMA transactions with this pasid
|
|
* will be blocked by the hardware.
|
|
* @viommu_alloc: Allocate an iommufd_viommu on a physical IOMMU instance behind
|
|
* the @dev, as the set of virtualization resources shared/passed
|
|
* to user space IOMMU instance. And associate it with a nesting
|
|
* @parent_domain. The @viommu_type must be defined in the header
|
|
* include/uapi/linux/iommufd.h
|
|
* It is required to call iommufd_viommu_alloc() helper for
|
|
* a bundled allocation of the core and the driver structures,
|
|
* using the given @ictx pointer.
|
|
* @pgsize_bitmap: bitmap of all possible supported page sizes
|
|
* @owner: Driver module providing these ops
|
|
* @identity_domain: An always available, always attachable identity
|
|
* translation.
|
|
* @blocked_domain: An always available, always attachable blocking
|
|
* translation.
|
|
* @default_domain: If not NULL this will always be set as the default domain.
|
|
* This should be an IDENTITY/BLOCKED/PLATFORM domain.
|
|
* Do not use in new drivers.
|
|
* @user_pasid_table: IOMMU driver supports user-managed PASID table. There is
|
|
* no user domain for each PASID and the I/O page faults are
|
|
* forwarded through the user domain attached to the device
|
|
* RID.
|
|
*/
|
|
struct iommu_ops {
|
|
bool (*capable)(struct device *dev, enum iommu_cap);
|
|
void *(*hw_info)(struct device *dev, u32 *length, u32 *type);
|
|
|
|
/* Domain allocation and freeing by the iommu driver */
|
|
struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
|
|
struct iommu_domain *(*domain_alloc_paging_flags)(
|
|
struct device *dev, u32 flags,
|
|
const struct iommu_user_data *user_data);
|
|
struct iommu_domain *(*domain_alloc_paging)(struct device *dev);
|
|
struct iommu_domain *(*domain_alloc_sva)(struct device *dev,
|
|
struct mm_struct *mm);
|
|
struct iommu_domain *(*domain_alloc_nested)(
|
|
struct device *dev, struct iommu_domain *parent, u32 flags,
|
|
const struct iommu_user_data *user_data);
|
|
|
|
struct iommu_device *(*probe_device)(struct device *dev);
|
|
void (*release_device)(struct device *dev);
|
|
void (*probe_finalize)(struct device *dev);
|
|
struct iommu_group *(*device_group)(struct device *dev);
|
|
|
|
/* Request/Free a list of reserved regions for a device */
|
|
void (*get_resv_regions)(struct device *dev, struct list_head *list);
|
|
|
|
int (*of_xlate)(struct device *dev, const struct of_phandle_args *args);
|
|
bool (*is_attach_deferred)(struct device *dev);
|
|
|
|
/* Per device IOMMU features */
|
|
int (*dev_enable_feat)(struct device *dev, enum iommu_dev_features f);
|
|
int (*dev_disable_feat)(struct device *dev, enum iommu_dev_features f);
|
|
|
|
void (*page_response)(struct device *dev, struct iopf_fault *evt,
|
|
struct iommu_page_response *msg);
|
|
|
|
int (*def_domain_type)(struct device *dev);
|
|
void (*remove_dev_pasid)(struct device *dev, ioasid_t pasid,
|
|
struct iommu_domain *domain);
|
|
|
|
struct iommufd_viommu *(*viommu_alloc)(
|
|
struct device *dev, struct iommu_domain *parent_domain,
|
|
struct iommufd_ctx *ictx, unsigned int viommu_type);
|
|
|
|
const struct iommu_domain_ops *default_domain_ops;
|
|
unsigned long pgsize_bitmap;
|
|
struct module *owner;
|
|
struct iommu_domain *identity_domain;
|
|
struct iommu_domain *blocked_domain;
|
|
struct iommu_domain *release_domain;
|
|
struct iommu_domain *default_domain;
|
|
u8 user_pasid_table:1;
|
|
};
|
|
|
|
/**
|
|
* struct iommu_domain_ops - domain specific operations
|
|
* @attach_dev: attach an iommu domain to a device
|
|
* Return:
|
|
* * 0 - success
|
|
* * EINVAL - can indicate that device and domain are incompatible due to
|
|
* some previous configuration of the domain, in which case the
|
|
* driver shouldn't log an error, since it is legitimate for a
|
|
* caller to test reuse of existing domains. Otherwise, it may
|
|
* still represent some other fundamental problem
|
|
* * ENOMEM - out of memory
|
|
* * ENOSPC - non-ENOMEM type of resource allocation failures
|
|
* * EBUSY - device is attached to a domain and cannot be changed
|
|
* * ENODEV - device specific errors, not able to be attached
|
|
* * <others> - treated as ENODEV by the caller. Use is discouraged
|
|
* @set_dev_pasid: set or replace an iommu domain to a pasid of device. The pasid of
|
|
* the device should be left in the old config in error case.
|
|
* @map_pages: map a physically contiguous set of pages of the same size to
|
|
* an iommu domain.
|
|
* @unmap_pages: unmap a number of pages of the same size from an iommu domain
|
|
* @flush_iotlb_all: Synchronously flush all hardware TLBs for this domain
|
|
* @iotlb_sync_map: Sync mappings created recently using @map to the hardware
|
|
* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
|
|
* queue
|
|
* @cache_invalidate_user: Flush hardware cache for user space IO page table.
|
|
* The @domain must be IOMMU_DOMAIN_NESTED. The @array
|
|
* passes in the cache invalidation requests, in form
|
|
* of a driver data structure. The driver must update
|
|
* array->entry_num to report the number of handled
|
|
* invalidation requests. The driver data structure
|
|
* must be defined in include/uapi/linux/iommufd.h
|
|
* @iova_to_phys: translate iova to physical address
|
|
* @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE,
|
|
* including no-snoop TLPs on PCIe or other platform
|
|
* specific mechanisms.
|
|
* @set_pgtable_quirks: Set io page table quirks (IO_PGTABLE_QUIRK_*)
|
|
* @free: Release the domain after use.
|
|
*/
|
|
struct iommu_domain_ops {
|
|
int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
|
|
int (*set_dev_pasid)(struct iommu_domain *domain, struct device *dev,
|
|
ioasid_t pasid, struct iommu_domain *old);
|
|
|
|
int (*map_pages)(struct iommu_domain *domain, unsigned long iova,
|
|
phys_addr_t paddr, size_t pgsize, size_t pgcount,
|
|
int prot, gfp_t gfp, size_t *mapped);
|
|
size_t (*unmap_pages)(struct iommu_domain *domain, unsigned long iova,
|
|
size_t pgsize, size_t pgcount,
|
|
struct iommu_iotlb_gather *iotlb_gather);
|
|
|
|
void (*flush_iotlb_all)(struct iommu_domain *domain);
|
|
int (*iotlb_sync_map)(struct iommu_domain *domain, unsigned long iova,
|
|
size_t size);
|
|
void (*iotlb_sync)(struct iommu_domain *domain,
|
|
struct iommu_iotlb_gather *iotlb_gather);
|
|
int (*cache_invalidate_user)(struct iommu_domain *domain,
|
|
struct iommu_user_data_array *array);
|
|
|
|
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain,
|
|
dma_addr_t iova);
|
|
|
|
bool (*enforce_cache_coherency)(struct iommu_domain *domain);
|
|
int (*set_pgtable_quirks)(struct iommu_domain *domain,
|
|
unsigned long quirks);
|
|
|
|
void (*free)(struct iommu_domain *domain);
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
* @singleton_group: Used internally for drivers that have only one group
|
|
* @max_pasids: number of supported PASIDs
|
|
*/
|
|
struct iommu_device {
|
|
struct list_head list;
|
|
const struct iommu_ops *ops;
|
|
struct fwnode_handle *fwnode;
|
|
struct device *dev;
|
|
struct iommu_group *singleton_group;
|
|
u32 max_pasids;
|
|
};
|
|
|
|
/**
|
|
* struct iommu_fault_param - per-device IOMMU fault data
|
|
* @lock: protect pending faults list
|
|
* @users: user counter to manage the lifetime of the data
|
|
* @rcu: rcu head for kfree_rcu()
|
|
* @dev: the device that owns this param
|
|
* @queue: IOPF queue
|
|
* @queue_list: index into queue->devices
|
|
* @partial: faults that are part of a Page Request Group for which the last
|
|
* request hasn't been submitted yet.
|
|
* @faults: holds the pending faults which need response
|
|
*/
|
|
struct iommu_fault_param {
|
|
struct mutex lock;
|
|
refcount_t users;
|
|
struct rcu_head rcu;
|
|
|
|
struct device *dev;
|
|
struct iopf_queue *queue;
|
|
struct list_head queue_list;
|
|
|
|
struct list_head partial;
|
|
struct list_head faults;
|
|
};
|
|
|
|
/**
|
|
* struct dev_iommu - Collection of per-device IOMMU data
|
|
*
|
|
* @fault_param: IOMMU detected device fault reporting data
|
|
* @fwspec: IOMMU fwspec data
|
|
* @iommu_dev: IOMMU device this device is linked to
|
|
* @priv: IOMMU Driver private data
|
|
* @max_pasids: number of PASIDs this device can consume
|
|
* @attach_deferred: the dma domain attachment is deferred
|
|
* @pci_32bit_workaround: Limit DMA allocations to 32-bit IOVAs
|
|
* @require_direct: device requires IOMMU_RESV_DIRECT regions
|
|
* @shadow_on_flush: IOTLB flushes are used to sync shadow tables
|
|
*
|
|
* TODO: migrate other per device data pointers under iommu_dev_data, e.g.
|
|
* struct iommu_group *iommu_group;
|
|
*/
|
|
struct dev_iommu {
|
|
struct mutex lock;
|
|
struct iommu_fault_param __rcu *fault_param;
|
|
struct iommu_fwspec *fwspec;
|
|
struct iommu_device *iommu_dev;
|
|
void *priv;
|
|
u32 max_pasids;
|
|
u32 attach_deferred:1;
|
|
u32 pci_32bit_workaround:1;
|
|
u32 require_direct:1;
|
|
u32 shadow_on_flush:1;
|
|
};
|
|
|
|
int iommu_device_register(struct iommu_device *iommu,
|
|
const struct iommu_ops *ops,
|
|
struct device *hwdev);
|
|
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);
|
|
int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
|
|
|
|
static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
|
|
{
|
|
return (struct iommu_device *)dev_get_drvdata(dev);
|
|
}
|
|
|
|
/**
|
|
* iommu_get_iommu_dev - Get iommu_device for a device
|
|
* @dev: an end-point device
|
|
*
|
|
* Note that this function must be called from the iommu_ops
|
|
* to retrieve the iommu_device for a device, which the core code
|
|
* guarentees it will not invoke the op without an attached iommu.
|
|
*/
|
|
static inline struct iommu_device *__iommu_get_iommu_dev(struct device *dev)
|
|
{
|
|
return dev->iommu->iommu_dev;
|
|
}
|
|
|
|
#define iommu_get_iommu_dev(dev, type, member) \
|
|
container_of(__iommu_get_iommu_dev(dev), type, member)
|
|
|
|
static inline void iommu_iotlb_gather_init(struct iommu_iotlb_gather *gather)
|
|
{
|
|
*gather = (struct iommu_iotlb_gather) {
|
|
.start = ULONG_MAX,
|
|
.freelist = LIST_HEAD_INIT(gather->freelist),
|
|
};
|
|
}
|
|
|
|
extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);
|
|
extern bool iommu_group_has_isolated_msi(struct iommu_group *group);
|
|
struct iommu_domain *iommu_paging_domain_alloc_flags(struct device *dev, unsigned int flags);
|
|
static inline struct iommu_domain *iommu_paging_domain_alloc(struct device *dev)
|
|
{
|
|
return iommu_paging_domain_alloc_flags(dev, 0);
|
|
}
|
|
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 struct iommu_domain *iommu_get_dma_domain(struct device *dev);
|
|
extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
|
|
phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
|
|
extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
|
|
size_t size);
|
|
extern size_t iommu_unmap_fast(struct iommu_domain *domain,
|
|
unsigned long iova, size_t size,
|
|
struct iommu_iotlb_gather *iotlb_gather);
|
|
extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
|
|
struct scatterlist *sg, unsigned int nents,
|
|
int prot, gfp_t gfp);
|
|
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
|
|
extern void iommu_set_fault_handler(struct iommu_domain *domain,
|
|
iommu_fault_handler_t handler, void *token);
|
|
|
|
extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
|
|
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
|
|
extern void iommu_set_default_passthrough(bool cmd_line);
|
|
extern void iommu_set_default_translated(bool cmd_line);
|
|
extern bool iommu_default_passthrough(void);
|
|
extern struct iommu_resv_region *
|
|
iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
|
|
enum iommu_resv_type type, gfp_t gfp);
|
|
extern int iommu_get_group_resv_regions(struct iommu_group *group,
|
|
struct list_head *head);
|
|
|
|
extern int iommu_attach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group);
|
|
extern void iommu_detach_group(struct iommu_domain *domain,
|
|
struct iommu_group *group);
|
|
extern struct iommu_group *iommu_group_alloc(void);
|
|
extern void *iommu_group_get_iommudata(struct iommu_group *group);
|
|
extern void iommu_group_set_iommudata(struct iommu_group *group,
|
|
void *iommu_data,
|
|
void (*release)(void *iommu_data));
|
|
extern int iommu_group_set_name(struct iommu_group *group, const char *name);
|
|
extern int iommu_group_add_device(struct iommu_group *group,
|
|
struct device *dev);
|
|
extern void iommu_group_remove_device(struct device *dev);
|
|
extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
|
|
int (*fn)(struct device *, void *));
|
|
extern struct iommu_group *iommu_group_get(struct device *dev);
|
|
extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
|
|
extern void iommu_group_put(struct iommu_group *group);
|
|
|
|
extern int iommu_group_id(struct iommu_group *group);
|
|
extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
|
|
|
|
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;
|
|
}
|
|
|
|
static inline void iommu_dirty_bitmap_init(struct iommu_dirty_bitmap *dirty,
|
|
struct iova_bitmap *bitmap,
|
|
struct iommu_iotlb_gather *gather)
|
|
{
|
|
if (gather)
|
|
iommu_iotlb_gather_init(gather);
|
|
|
|
dirty->bitmap = bitmap;
|
|
dirty->gather = gather;
|
|
}
|
|
|
|
static inline void iommu_dirty_bitmap_record(struct iommu_dirty_bitmap *dirty,
|
|
unsigned long iova,
|
|
unsigned long length)
|
|
{
|
|
if (dirty->bitmap)
|
|
iova_bitmap_set(dirty->bitmap, iova, length);
|
|
|
|
if (dirty->gather)
|
|
iommu_iotlb_gather_add_range(dirty->gather, iova, length);
|
|
}
|
|
|
|
/* 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);
|
|
extern struct iommu_group *generic_single_device_group(struct device *dev);
|
|
|
|
/**
|
|
* struct iommu_fwspec - per-device IOMMU instance data
|
|
* @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
|
|
*
|
|
* Note that the IDs (and any other information, really) stored in this structure should be
|
|
* considered private to the IOMMU device driver and are not to be used directly by IOMMU
|
|
* consumers.
|
|
*/
|
|
struct iommu_fwspec {
|
|
struct fwnode_handle *iommu_fwnode;
|
|
u32 flags;
|
|
unsigned int num_ids;
|
|
u32 ids[];
|
|
};
|
|
|
|
/* ATS is supported */
|
|
#define IOMMU_FWSPEC_PCI_RC_ATS (1 << 0)
|
|
/* CANWBS is supported */
|
|
#define IOMMU_FWSPEC_PCI_RC_CANWBS (1 << 1)
|
|
|
|
/*
|
|
* An iommu attach handle represents a relationship between an iommu domain
|
|
* and a PASID or RID of a device. It is allocated and managed by the component
|
|
* that manages the domain and is stored in the iommu group during the time the
|
|
* domain is attached.
|
|
*/
|
|
struct iommu_attach_handle {
|
|
struct iommu_domain *domain;
|
|
};
|
|
|
|
/**
|
|
* struct iommu_sva - handle to a device-mm bond
|
|
*/
|
|
struct iommu_sva {
|
|
struct iommu_attach_handle handle;
|
|
struct device *dev;
|
|
refcount_t users;
|
|
};
|
|
|
|
struct iommu_mm_data {
|
|
u32 pasid;
|
|
struct list_head sva_domains;
|
|
};
|
|
|
|
int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode);
|
|
void iommu_fwspec_free(struct device *dev);
|
|
int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids);
|
|
|
|
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;
|
|
}
|
|
|
|
void dev_iommu_priv_set(struct device *dev, void *priv);
|
|
|
|
extern struct mutex iommu_probe_device_lock;
|
|
int iommu_probe_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);
|
|
|
|
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);
|
|
|
|
int iommu_device_claim_dma_owner(struct device *dev, void *owner);
|
|
void iommu_device_release_dma_owner(struct device *dev);
|
|
|
|
int iommu_attach_device_pasid(struct iommu_domain *domain,
|
|
struct device *dev, ioasid_t pasid,
|
|
struct iommu_attach_handle *handle);
|
|
void iommu_detach_device_pasid(struct iommu_domain *domain,
|
|
struct device *dev, ioasid_t pasid);
|
|
ioasid_t iommu_alloc_global_pasid(struct device *dev);
|
|
void iommu_free_global_pasid(ioasid_t pasid);
|
|
#else /* CONFIG_IOMMU_API */
|
|
|
|
struct iommu_ops {};
|
|
struct iommu_group {};
|
|
struct iommu_fwspec {};
|
|
struct iommu_device {};
|
|
struct iommu_fault_param {};
|
|
struct iommu_iotlb_gather {};
|
|
struct iommu_dirty_bitmap {};
|
|
struct iommu_dirty_ops {};
|
|
|
|
static inline bool device_iommu_capable(struct device *dev, enum iommu_cap cap)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline struct iommu_domain *iommu_paging_domain_alloc_flags(struct device *dev,
|
|
unsigned int flags)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static inline struct iommu_domain *iommu_paging_domain_alloc(struct device *dev)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
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, gfp_t gfp)
|
|
{
|
|
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, gfp_t gfp)
|
|
{
|
|
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_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_dirty_bitmap_init(struct iommu_dirty_bitmap *dirty,
|
|
struct iova_bitmap *bitmap,
|
|
struct iommu_iotlb_gather *gather)
|
|
{
|
|
}
|
|
|
|
static inline void iommu_dirty_bitmap_record(struct iommu_dirty_bitmap *dirty,
|
|
unsigned long iova,
|
|
unsigned long length)
|
|
{
|
|
}
|
|
|
|
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)
|
|
{
|
|
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_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_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;
|
|
}
|
|
|
|
static inline void iommu_device_release_dma_owner(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_device_claim_dma_owner(struct device *dev, void *owner)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_attach_device_pasid(struct iommu_domain *domain,
|
|
struct device *dev, ioasid_t pasid,
|
|
struct iommu_attach_handle *handle)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iommu_detach_device_pasid(struct iommu_domain *domain,
|
|
struct device *dev, ioasid_t pasid)
|
|
{
|
|
}
|
|
|
|
static inline ioasid_t iommu_alloc_global_pasid(struct device *dev)
|
|
{
|
|
return IOMMU_PASID_INVALID;
|
|
}
|
|
|
|
static inline void iommu_free_global_pasid(ioasid_t pasid) {}
|
|
#endif /* CONFIG_IOMMU_API */
|
|
|
|
#if IS_ENABLED(CONFIG_LOCKDEP) && IS_ENABLED(CONFIG_IOMMU_API)
|
|
void iommu_group_mutex_assert(struct device *dev);
|
|
#else
|
|
static inline void iommu_group_mutex_assert(struct device *dev)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* 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 ssize_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,
|
|
GFP_KERNEL);
|
|
}
|
|
|
|
#ifdef CONFIG_IOMMU_DEBUGFS
|
|
extern struct dentry *iommu_debugfs_dir;
|
|
void iommu_debugfs_setup(void);
|
|
#else
|
|
static inline void iommu_debugfs_setup(void) {}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IOMMU_DMA
|
|
#include <linux/msi.h>
|
|
|
|
int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base);
|
|
|
|
int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr);
|
|
void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg);
|
|
|
|
#else /* CONFIG_IOMMU_DMA */
|
|
|
|
struct msi_desc;
|
|
struct msi_msg;
|
|
|
|
static inline int iommu_get_msi_cookie(struct iommu_domain *domain, dma_addr_t base)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline int iommu_dma_prepare_msi(struct msi_desc *desc, phys_addr_t msi_addr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_IOMMU_DMA */
|
|
|
|
/*
|
|
* Newer generations of Tegra SoCs require devices' stream IDs to be directly programmed into
|
|
* some registers. These are always paired with a Tegra SMMU or ARM SMMU, for which the contents
|
|
* of the struct iommu_fwspec are known. Use this helper to formalize access to these internals.
|
|
*/
|
|
#define TEGRA_STREAM_ID_BYPASS 0x7f
|
|
|
|
static inline bool tegra_dev_iommu_get_stream_id(struct device *dev, u32 *stream_id)
|
|
{
|
|
#ifdef CONFIG_IOMMU_API
|
|
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
|
|
|
|
if (fwspec && fwspec->num_ids == 1) {
|
|
*stream_id = fwspec->ids[0] & 0xffff;
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
return false;
|
|
}
|
|
|
|
#ifdef CONFIG_IOMMU_MM_DATA
|
|
static inline void mm_pasid_init(struct mm_struct *mm)
|
|
{
|
|
/*
|
|
* During dup_mm(), a new mm will be memcpy'd from an old one and that makes
|
|
* the new mm and the old one point to a same iommu_mm instance. When either
|
|
* one of the two mms gets released, the iommu_mm instance is freed, leaving
|
|
* the other mm running into a use-after-free/double-free problem. To avoid
|
|
* the problem, zeroing the iommu_mm pointer of a new mm is needed here.
|
|
*/
|
|
mm->iommu_mm = NULL;
|
|
}
|
|
|
|
static inline bool mm_valid_pasid(struct mm_struct *mm)
|
|
{
|
|
return READ_ONCE(mm->iommu_mm);
|
|
}
|
|
|
|
static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm)
|
|
{
|
|
struct iommu_mm_data *iommu_mm = READ_ONCE(mm->iommu_mm);
|
|
|
|
if (!iommu_mm)
|
|
return IOMMU_PASID_INVALID;
|
|
return iommu_mm->pasid;
|
|
}
|
|
|
|
void mm_pasid_drop(struct mm_struct *mm);
|
|
struct iommu_sva *iommu_sva_bind_device(struct device *dev,
|
|
struct mm_struct *mm);
|
|
void iommu_sva_unbind_device(struct iommu_sva *handle);
|
|
u32 iommu_sva_get_pasid(struct iommu_sva *handle);
|
|
#else
|
|
static inline struct iommu_sva *
|
|
iommu_sva_bind_device(struct device *dev, struct mm_struct *mm)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
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 void mm_pasid_init(struct mm_struct *mm) {}
|
|
static inline bool mm_valid_pasid(struct mm_struct *mm) { return false; }
|
|
|
|
static inline u32 mm_get_enqcmd_pasid(struct mm_struct *mm)
|
|
{
|
|
return IOMMU_PASID_INVALID;
|
|
}
|
|
|
|
static inline void mm_pasid_drop(struct mm_struct *mm) {}
|
|
#endif /* CONFIG_IOMMU_SVA */
|
|
|
|
#ifdef CONFIG_IOMMU_IOPF
|
|
int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev);
|
|
void iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev);
|
|
int iopf_queue_flush_dev(struct device *dev);
|
|
struct iopf_queue *iopf_queue_alloc(const char *name);
|
|
void iopf_queue_free(struct iopf_queue *queue);
|
|
int iopf_queue_discard_partial(struct iopf_queue *queue);
|
|
void iopf_free_group(struct iopf_group *group);
|
|
int iommu_report_device_fault(struct device *dev, struct iopf_fault *evt);
|
|
void iopf_group_response(struct iopf_group *group,
|
|
enum iommu_page_response_code status);
|
|
#else
|
|
static inline int
|
|
iopf_queue_add_device(struct iopf_queue *queue, struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void
|
|
iopf_queue_remove_device(struct iopf_queue *queue, struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int iopf_queue_flush_dev(struct device *dev)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline struct iopf_queue *iopf_queue_alloc(const char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void iopf_queue_free(struct iopf_queue *queue)
|
|
{
|
|
}
|
|
|
|
static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iopf_free_group(struct iopf_group *group)
|
|
{
|
|
}
|
|
|
|
static inline int
|
|
iommu_report_device_fault(struct device *dev, struct iopf_fault *evt)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
static inline void iopf_group_response(struct iopf_group *group,
|
|
enum iommu_page_response_code status)
|
|
{
|
|
}
|
|
#endif /* CONFIG_IOMMU_IOPF */
|
|
#endif /* __LINUX_IOMMU_H */
|