| 1 | /*
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| 2 | * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
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| 3 | * Author: Joerg Roedel <joerg.roedel@amd.com>
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or modify it
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| 6 | * under the terms of the GNU General Public License version 2 as published
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| 7 | * by the Free Software Foundation.
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| 8 | *
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| 9 | * This program is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | * GNU General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU General Public License
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| 15 | * along with this program; if not, write to the Free Software
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| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 17 | */
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| 18 |
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| 19 | #ifndef __LINUX_IOMMU_H
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| 20 | #define __LINUX_IOMMU_H
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| 21 |
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| 22 | //#include <linux/scatterlist.h>
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| 23 | #include <linux/device.h>
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| 24 | #include <linux/types.h>
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| 25 | #include <linux/errno.h>
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| 26 | #include <linux/err.h>
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| 27 | #include <linux/of.h>
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| 28 |
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| 29 | #define IOMMU_READ (1 << 0)
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| 30 | #define IOMMU_WRITE (1 << 1)
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| 31 | #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */
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| 32 | #define IOMMU_NOEXEC (1 << 3)
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| 33 | #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */
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| 34 | /*
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| 35 | * Where the bus hardware includes a privilege level as part of its access type
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| 36 | * markings, and certain devices are capable of issuing transactions marked as
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| 37 | * either 'supervisor' or 'user', the IOMMU_PRIV flag requests that the other
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| 38 | * given permission flags only apply to accesses at the higher privilege level,
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| 39 | * and that unprivileged transactions should have as little access as possible.
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| 40 | * This would usually imply the same permissions as kernel mappings on the CPU,
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| 41 | * if the IOMMU page table format is equivalent.
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| 42 | */
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| 43 | #define IOMMU_PRIV (1 << 5)
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| 44 |
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| 45 | struct iommu_ops;
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| 46 | struct iommu_group;
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| 47 | struct bus_type;
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| 48 | struct device;
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| 49 | struct iommu_domain;
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| 50 | struct notifier_block;
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| 51 |
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| 52 | /* iommu fault flags */
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| 53 | #define IOMMU_FAULT_READ 0x0
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| 54 | #define IOMMU_FAULT_WRITE 0x1
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| 55 |
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| 56 | typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
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| 57 | struct device *, unsigned long, int, void *);
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| 58 |
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| 59 | struct iommu_domain_geometry {
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| 60 | dma_addr_t aperture_start; /* First address that can be mapped */
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| 61 | dma_addr_t aperture_end; /* Last address that can be mapped */
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| 62 | bool force_aperture; /* DMA only allowed in mappable range? */
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| 63 | };
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| 64 |
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| 65 | /* Domain feature flags */
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| 66 | #define __IOMMU_DOMAIN_PAGING (1U << 0) /* Support for iommu_map/unmap */
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| 67 | #define __IOMMU_DOMAIN_DMA_API (1U << 1) /* Domain for use in DMA-API
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| 68 | implementation */
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| 69 | #define __IOMMU_DOMAIN_PT (1U << 2) /* Domain is identity mapped */
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| 70 |
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| 71 | /*
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| 72 | * This are the possible domain-types
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| 73 | *
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| 74 | * IOMMU_DOMAIN_BLOCKED - All DMA is blocked, can be used to isolate
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| 75 | * devices
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| 76 | * IOMMU_DOMAIN_IDENTITY - DMA addresses are system physical addresses
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| 77 | * IOMMU_DOMAIN_UNMANAGED - DMA mappings managed by IOMMU-API user, used
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| 78 | * for VMs
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| 79 | * IOMMU_DOMAIN_DMA - Internally used for DMA-API implementations.
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| 80 | * This flag allows IOMMU drivers to implement
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| 81 | * certain optimizations for these domains
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| 82 | */
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| 83 | #define IOMMU_DOMAIN_BLOCKED (0U)
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| 84 | #define IOMMU_DOMAIN_IDENTITY (__IOMMU_DOMAIN_PT)
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| 85 | #define IOMMU_DOMAIN_UNMANAGED (__IOMMU_DOMAIN_PAGING)
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| 86 | #define IOMMU_DOMAIN_DMA (__IOMMU_DOMAIN_PAGING | \
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| 87 | __IOMMU_DOMAIN_DMA_API)
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| 88 |
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| 89 | struct iommu_domain {
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| 90 | unsigned type;
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| 91 | const struct iommu_ops *ops;
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| 92 | unsigned long pgsize_bitmap; /* Bitmap of page sizes in use */
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| 93 | iommu_fault_handler_t handler;
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| 94 | void *handler_token;
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| 95 | struct iommu_domain_geometry geometry;
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| 96 | void *iova_cookie;
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| 97 | };
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| 98 |
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| 99 | enum iommu_cap {
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| 100 | IOMMU_CAP_CACHE_COHERENCY, /* IOMMU can enforce cache coherent DMA
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| 101 | transactions */
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| 102 | IOMMU_CAP_INTR_REMAP, /* IOMMU supports interrupt isolation */
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| 103 | IOMMU_CAP_NOEXEC, /* IOMMU_NOEXEC flag */
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| 104 | };
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| 105 |
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| 106 | /*
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| 107 | * Following constraints are specifc to FSL_PAMUV1:
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| 108 | * -aperture must be power of 2, and naturally aligned
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| 109 | * -number of windows must be power of 2, and address space size
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| 110 | * of each window is determined by aperture size / # of windows
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| 111 | * -the actual size of the mapped region of a window must be power
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| 112 | * of 2 starting with 4KB and physical address must be naturally
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| 113 | * aligned.
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| 114 | * DOMAIN_ATTR_FSL_PAMUV1 corresponds to the above mentioned contraints.
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| 115 | * The caller can invoke iommu_domain_get_attr to check if the underlying
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| 116 | * iommu implementation supports these constraints.
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| 117 | */
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| 118 |
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| 119 | enum iommu_attr {
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| 120 | DOMAIN_ATTR_GEOMETRY,
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| 121 | DOMAIN_ATTR_PAGING,
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| 122 | DOMAIN_ATTR_WINDOWS,
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| 123 | DOMAIN_ATTR_FSL_PAMU_STASH,
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| 124 | DOMAIN_ATTR_FSL_PAMU_ENABLE,
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| 125 | DOMAIN_ATTR_FSL_PAMUV1,
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| 126 | DOMAIN_ATTR_NESTING, /* two stages of translation */
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| 127 | DOMAIN_ATTR_MAX,
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| 128 | };
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| 129 |
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| 130 | /* These are the possible reserved region types */
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| 131 | enum iommu_resv_type {
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| 132 | /* Memory regions which must be mapped 1:1 at all times */
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| 133 | IOMMU_RESV_DIRECT,
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| 134 | /* Arbitrary "never map this or give it to a device" address ranges */
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| 135 | IOMMU_RESV_RESERVED,
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| 136 | /* Hardware MSI region (untranslated) */
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| 137 | IOMMU_RESV_MSI,
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| 138 | /* Software-managed MSI translation window */
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| 139 | IOMMU_RESV_SW_MSI,
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| 140 | };
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| 141 |
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| 142 | /**
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| 143 | * struct iommu_resv_region - descriptor for a reserved memory region
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| 144 | * @list: Linked list pointers
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| 145 | * @start: System physical start address of the region
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| 146 | * @length: Length of the region in bytes
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| 147 | * @prot: IOMMU Protection flags (READ/WRITE/...)
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| 148 | * @type: Type of the reserved region
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| 149 | */
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| 150 | struct iommu_resv_region {
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| 151 | struct list_head list;
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| 152 | // phys_addr_t start;
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| 153 | size_t length;
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| 154 | int prot;
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| 155 | enum iommu_resv_type type;
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| 156 | };
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| 157 |
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| 158 | #ifdef CONFIG_IOMMU_API
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| 159 |
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| 160 | /**
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| 161 | * struct iommu_ops - iommu ops and capabilities
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| 162 | * @capable: check capability
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| 163 | * @domain_alloc: allocate iommu domain
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| 164 | * @domain_free: free iommu domain
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| 165 | * @attach_dev: attach device to an iommu domain
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| 166 | * @detach_dev: detach device from an iommu domain
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| 167 | * @map: map a physically contiguous memory region to an iommu domain
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| 168 | * @unmap: unmap a physically contiguous memory region from an iommu domain
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| 169 | * @flush_tlb_all: Synchronously flush all hardware TLBs for this domain
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| 170 | * @tlb_range_add: Add a given iova range to the flush queue for this domain
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| 171 | * @tlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
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| 172 | * queue
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| 173 | * @iova_to_phys: translate iova to physical address
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| 174 | * @add_device: add device to iommu grouping
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| 175 | * @remove_device: remove device from iommu grouping
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| 176 | * @device_group: find iommu group for a particular device
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| 177 | * @domain_get_attr: Query domain attributes
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| 178 | * @domain_set_attr: Change domain attributes
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| 179 | * @get_resv_regions: Request list of reserved regions for a device
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| 180 | * @put_resv_regions: Free list of reserved regions for a device
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| 181 | * @apply_resv_region: Temporary helper call-back for iova reserved ranges
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| 182 | * @domain_window_enable: Configure and enable a particular window for a domain
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| 183 | * @domain_window_disable: Disable a particular window for a domain
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| 184 | * @domain_set_windows: Set the number of windows for a domain
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| 185 | * @domain_get_windows: Return the number of windows for a domain
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| 186 | * @of_xlate: add OF master IDs to iommu grouping
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| 187 | * @pgsize_bitmap: bitmap of all possible supported page sizes
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| 188 | */
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| 189 | struct iommu_ops {
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| 190 | bool (*capable)(enum iommu_cap);
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| 191 |
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| 192 | /* Domain allocation and freeing by the iommu driver */
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| 193 | struct iommu_domain *(*domain_alloc)(unsigned iommu_domain_type);
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| 194 | void (*domain_free)(struct iommu_domain *);
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| 195 |
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| 196 | int (*attach_dev)(struct iommu_domain *domain, struct device *dev);
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| 197 | void (*detach_dev)(struct iommu_domain *domain, struct device *dev);
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| 198 | int (*map)(struct iommu_domain *domain, unsigned long iova,
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| 199 | phys_addr_t paddr, size_t size, int prot);
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| 200 | size_t (*unmap)(struct iommu_domain *domain, unsigned long iova,
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| 201 | size_t size);
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| 202 | void (*flush_iotlb_all)(struct iommu_domain *domain);
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| 203 | void (*iotlb_range_add)(struct iommu_domain *domain,
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| 204 | unsigned long iova, size_t size);
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| 205 | void (*iotlb_sync)(struct iommu_domain *domain);
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| 206 | phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
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| 207 | int (*add_device)(struct device *dev);
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| 208 | void (*remove_device)(struct device *dev);
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| 209 | struct iommu_group *(*device_group)(struct device *dev);
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| 210 | int (*domain_get_attr)(struct iommu_domain *domain,
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| 211 | enum iommu_attr attr, void *data);
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| 212 | int (*domain_set_attr)(struct iommu_domain *domain,
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| 213 | enum iommu_attr attr, void *data);
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| 214 |
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| 215 | /* Request/Free a list of reserved regions for a device */
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| 216 | void (*get_resv_regions)(struct device *dev, struct list_head *list);
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| 217 | void (*put_resv_regions)(struct device *dev, struct list_head *list);
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| 218 | void (*apply_resv_region)(struct device *dev,
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| 219 | struct iommu_domain *domain,
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| 220 | struct iommu_resv_region *region);
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| 221 |
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| 222 | /* Window handling functions */
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| 223 | int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
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| 224 | phys_addr_t paddr, u64 size, int prot);
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| 225 | void (*domain_window_disable)(struct iommu_domain *domain, u32 wnd_nr);
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| 226 | /* Set the number of windows per domain */
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| 227 | int (*domain_set_windows)(struct iommu_domain *domain, u32 w_count);
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| 228 | /* Get the number of windows per domain */
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| 229 | u32 (*domain_get_windows)(struct iommu_domain *domain);
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| 230 |
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| 231 | int (*of_xlate)(struct device *dev, struct of_phandle_args *args);
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| 232 | bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);
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| 233 |
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| 234 | unsigned long pgsize_bitmap;
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| 235 | };
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| 236 |
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| 237 | /**
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| 238 | * struct iommu_device - IOMMU core representation of one IOMMU hardware
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| 239 | * instance
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| 240 | * @list: Used by the iommu-core to keep a list of registered iommus
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| 241 | * @ops: iommu-ops for talking to this iommu
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| 242 | * @dev: struct device for sysfs handling
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| 243 | */
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| 244 | struct iommu_device {
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| 245 | struct list_head list;
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| 246 | const struct iommu_ops *ops;
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| 247 | struct fwnode_handle *fwnode;
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| 248 | struct device *dev;
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| 249 | };
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| 250 |
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| 251 | int iommu_device_register(struct iommu_device *iommu);
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| 252 | void iommu_device_unregister(struct iommu_device *iommu);
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| 253 | int iommu_device_sysfs_add(struct iommu_device *iommu,
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| 254 | struct device *parent,
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| 255 | const struct attribute_group **groups,
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| 256 | const char *fmt, ...) __printf(4, 5);
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| 257 | void iommu_device_sysfs_remove(struct iommu_device *iommu);
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| 258 | int iommu_device_link(struct iommu_device *iommu, struct device *link);
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| 259 | void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
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| 260 |
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| 261 | static inline void iommu_device_set_ops(struct iommu_device *iommu,
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| 262 | const struct iommu_ops *ops)
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| 263 | {
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| 264 | iommu->ops = ops;
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| 265 | }
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| 266 |
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| 267 | static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
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| 268 | struct fwnode_handle *fwnode)
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| 269 | {
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| 270 | iommu->fwnode = fwnode;
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| 271 | }
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| 272 |
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| 273 | static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
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| 274 | {
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| 275 | return (struct iommu_device *)dev_get_drvdata(dev);
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| 276 | }
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| 277 |
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| 278 | #define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
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| 279 | #define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
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| 280 | #define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
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| 281 | #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */
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| 282 | #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */
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| 283 | #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */
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| 284 |
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| 285 | extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops);
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| 286 | extern bool iommu_present(struct bus_type *bus);
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| 287 | extern bool iommu_capable(struct bus_type *bus, enum iommu_cap cap);
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| 288 | extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
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| 289 | extern struct iommu_group *iommu_group_get_by_id(int id);
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| 290 | extern void iommu_domain_free(struct iommu_domain *domain);
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| 291 | extern int iommu_attach_device(struct iommu_domain *domain,
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| 292 | struct device *dev);
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| 293 | extern void iommu_detach_device(struct iommu_domain *domain,
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| 294 | struct device *dev);
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| 295 | extern struct iommu_domain *iommu_get_domain_for_dev(struct device *dev);
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| 296 | extern int iommu_map(struct iommu_domain *domain, unsigned long iova,
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| 297 | phys_addr_t paddr, size_t size, int prot);
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| 298 | extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
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| 299 | size_t size);
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| 300 | extern size_t iommu_unmap_fast(struct iommu_domain *domain,
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| 301 | unsigned long iova, size_t size);
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| 302 | extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
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| 303 | struct scatterlist *sg,unsigned int nents, int prot);
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| 304 | extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
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| 305 | extern void iommu_set_fault_handler(struct iommu_domain *domain,
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| 306 | iommu_fault_handler_t handler, void *token);
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| 307 |
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| 308 | extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
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| 309 | extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
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| 310 | extern int iommu_request_dm_for_dev(struct device *dev);
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| 311 | extern struct iommu_resv_region *
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| 312 | iommu_alloc_resv_region(phys_addr_t start, size_t length, int prot,
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| 313 | enum iommu_resv_type type);
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| 314 | extern int iommu_get_group_resv_regions(struct iommu_group *group,
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| 315 | struct list_head *head);
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| 316 |
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| 317 | extern int iommu_attach_group(struct iommu_domain *domain,
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| 318 | struct iommu_group *group);
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| 319 | extern void iommu_detach_group(struct iommu_domain *domain,
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| 320 | struct iommu_group *group);
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| 321 | extern struct iommu_group *iommu_group_alloc(void);
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| 322 | extern void *iommu_group_get_iommudata(struct iommu_group *group);
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| 323 | extern void iommu_group_set_iommudata(struct iommu_group *group,
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| 324 | void *iommu_data,
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| 325 | void (*release)(void *iommu_data));
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| 326 | extern int iommu_group_set_name(struct iommu_group *group, const char *name);
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| 327 | extern int iommu_group_add_device(struct iommu_group *group,
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| 328 | struct device *dev);
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| 329 | extern void iommu_group_remove_device(struct device *dev);
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| 330 | extern int iommu_group_for_each_dev(struct iommu_group *group, void *data,
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| 331 | int (*fn)(struct device *, void *));
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| 332 | extern struct iommu_group *iommu_group_get(struct device *dev);
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| 333 | extern struct iommu_group *iommu_group_ref_get(struct iommu_group *group);
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| 334 | extern void iommu_group_put(struct iommu_group *group);
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| 335 | extern int iommu_group_register_notifier(struct iommu_group *group,
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| 336 | struct notifier_block *nb);
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| 337 | extern int iommu_group_unregister_notifier(struct iommu_group *group,
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| 338 | struct notifier_block *nb);
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| 339 | extern int iommu_group_id(struct iommu_group *group);
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| 340 | extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
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| 341 | extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);
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| 342 |
|
|---|
| 343 | extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
|
|---|
| 344 | void *data);
|
|---|
| 345 | extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
|
|---|
| 346 | void *data);
|
|---|
| 347 |
|
|---|
| 348 | /* Window handling function prototypes */
|
|---|
| 349 | extern int iommu_domain_window_enable(struct iommu_domain *domain, u32 wnd_nr,
|
|---|
| 350 | phys_addr_t offset, u64 size,
|
|---|
| 351 | int prot);
|
|---|
| 352 | extern void iommu_domain_window_disable(struct iommu_domain *domain, u32 wnd_nr);
|
|---|
| 353 |
|
|---|
| 354 | extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
|
|---|
| 355 | unsigned long iova, int flags);
|
|---|
| 356 |
|
|---|
| 357 | static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
|
|---|
| 358 | {
|
|---|
| 359 | if (domain->ops->flush_iotlb_all)
|
|---|
| 360 | domain->ops->flush_iotlb_all(domain);
|
|---|
| 361 | }
|
|---|
| 362 |
|
|---|
| 363 | static inline void iommu_tlb_range_add(struct iommu_domain *domain,
|
|---|
| 364 | unsigned long iova, size_t size)
|
|---|
| 365 | {
|
|---|
| 366 | if (domain->ops->iotlb_range_add)
|
|---|
| 367 | domain->ops->iotlb_range_add(domain, iova, size);
|
|---|
| 368 | }
|
|---|
| 369 |
|
|---|
| 370 | static inline void iommu_tlb_sync(struct iommu_domain *domain)
|
|---|
| 371 | {
|
|---|
| 372 | if (domain->ops->iotlb_sync)
|
|---|
| 373 | domain->ops->iotlb_sync(domain);
|
|---|
| 374 | }
|
|---|
| 375 |
|
|---|
| 376 | /* PCI device grouping function */
|
|---|
| 377 | extern struct iommu_group *pci_device_group(struct device *dev);
|
|---|
| 378 | /* Generic device grouping function */
|
|---|
| 379 | extern struct iommu_group *generic_device_group(struct device *dev);
|
|---|
| 380 |
|
|---|
| 381 | /**
|
|---|
| 382 | * struct iommu_fwspec - per-device IOMMU instance data
|
|---|
| 383 | * @ops: ops for this device's IOMMU
|
|---|
| 384 | * @iommu_fwnode: firmware handle for this device's IOMMU
|
|---|
| 385 | * @iommu_priv: IOMMU driver private data for this device
|
|---|
| 386 | * @num_ids: number of associated device IDs
|
|---|
| 387 | * @ids: IDs which this device may present to the IOMMU
|
|---|
| 388 | */
|
|---|
| 389 | struct iommu_fwspec {
|
|---|
| 390 | const struct iommu_ops *ops;
|
|---|
| 391 | struct fwnode_handle *iommu_fwnode;
|
|---|
| 392 | void *iommu_priv;
|
|---|
| 393 | unsigned int num_ids;
|
|---|
| 394 | u32 ids[1];
|
|---|
| 395 | };
|
|---|
| 396 |
|
|---|
| 397 | int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
|
|---|
| 398 | const struct iommu_ops *ops);
|
|---|
| 399 | void iommu_fwspec_free(struct device *dev);
|
|---|
| 400 | int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
|
|---|
| 401 | const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
|
|---|
| 402 |
|
|---|
| 403 | #else /* CONFIG_IOMMU_API */
|
|---|
| 404 |
|
|---|
| 405 | struct iommu_ops {int NOT_USED;};
|
|---|
| 406 | struct iommu_group {int NOT_USED;};
|
|---|
| 407 | struct iommu_fwspec {int NOT_USED;};
|
|---|
| 408 | struct iommu_device {int NOT_USED;};
|
|---|
| 409 |
|
|---|
| 410 | static inline bool iommu_present(struct bus_type *bus)
|
|---|
| 411 | {
|
|---|
| 412 | return false;
|
|---|
| 413 | }
|
|---|
| 414 |
|
|---|
| 415 | static inline bool iommu_capable(struct bus_type *bus, enum iommu_cap cap)
|
|---|
| 416 | {
|
|---|
| 417 | return false;
|
|---|
| 418 | }
|
|---|
| 419 |
|
|---|
| 420 | static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
|
|---|
| 421 | {
|
|---|
| 422 | return NULL;
|
|---|
| 423 | }
|
|---|
| 424 |
|
|---|
| 425 | static inline struct iommu_group *iommu_group_get_by_id(int id)
|
|---|
| 426 | {
|
|---|
| 427 | return NULL;
|
|---|
| 428 | }
|
|---|
| 429 |
|
|---|
| 430 | static inline void iommu_domain_free(struct iommu_domain *domain)
|
|---|
| 431 | {
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 | static inline int iommu_attach_device(struct iommu_domain *domain,
|
|---|
| 435 | struct device *dev)
|
|---|
| 436 | {
|
|---|
| 437 | return -ENODEV;
|
|---|
| 438 | }
|
|---|
| 439 |
|
|---|
| 440 | static inline void iommu_detach_device(struct iommu_domain *domain,
|
|---|
| 441 | struct device *dev)
|
|---|
| 442 | {
|
|---|
| 443 | }
|
|---|
| 444 |
|
|---|
| 445 | static inline struct iommu_domain *iommu_get_domain_for_dev(struct device *dev)
|
|---|
| 446 | {
|
|---|
| 447 | return NULL;
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | static inline int iommu_map(struct iommu_domain *domain, unsigned long iova,
|
|---|
| 451 | phys_addr_t paddr, size_t size, int prot)
|
|---|
| 452 | {
|
|---|
| 453 | return -ENODEV;
|
|---|
| 454 | }
|
|---|
| 455 |
|
|---|
| 456 | static inline size_t iommu_unmap(struct iommu_domain *domain,
|
|---|
| 457 | unsigned long iova, size_t size)
|
|---|
| 458 | {
|
|---|
| 459 | return 0;
|
|---|
| 460 | }
|
|---|
| 461 |
|
|---|
| 462 | static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
|
|---|
| 463 | unsigned long iova, int gfp_order)
|
|---|
| 464 | {
|
|---|
| 465 | return 0;
|
|---|
| 466 | }
|
|---|
| 467 |
|
|---|
| 468 | static inline size_t iommu_map_sg(struct iommu_domain *domain,
|
|---|
| 469 | unsigned long iova, struct scatterlist *sg,
|
|---|
| 470 | unsigned int nents, int prot)
|
|---|
| 471 | {
|
|---|
| 472 | return 0;
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | static inline void iommu_flush_tlb_all(struct iommu_domain *domain)
|
|---|
| 476 | {
|
|---|
| 477 | }
|
|---|
| 478 |
|
|---|
| 479 | static inline void iommu_tlb_range_add(struct iommu_domain *domain,
|
|---|
| 480 | unsigned long iova, size_t size)
|
|---|
| 481 | {
|
|---|
| 482 | }
|
|---|
| 483 |
|
|---|
| 484 | static inline void iommu_tlb_sync(struct iommu_domain *domain)
|
|---|
| 485 | {
|
|---|
| 486 | }
|
|---|
| 487 |
|
|---|
| 488 | static inline int iommu_domain_window_enable(struct iommu_domain *domain,
|
|---|
| 489 | u32 wnd_nr, phys_addr_t paddr,
|
|---|
| 490 | u64 size, int prot)
|
|---|
| 491 | {
|
|---|
| 492 | return -ENODEV;
|
|---|
| 493 | }
|
|---|
| 494 |
|
|---|
| 495 | static inline void iommu_domain_window_disable(struct iommu_domain *domain,
|
|---|
| 496 | u32 wnd_nr)
|
|---|
| 497 | {
|
|---|
| 498 | }
|
|---|
| 499 |
|
|---|
| 500 | static inline phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova)
|
|---|
| 501 | {
|
|---|
| 502 | return 0;
|
|---|
| 503 | }
|
|---|
| 504 |
|
|---|
| 505 | static inline void iommu_set_fault_handler(struct iommu_domain *domain,
|
|---|
| 506 | iommu_fault_handler_t handler, void *token)
|
|---|
| 507 | {
|
|---|
| 508 | }
|
|---|
| 509 |
|
|---|
| 510 | static inline void iommu_get_resv_regions(struct device *dev,
|
|---|
| 511 | struct list_head *list)
|
|---|
| 512 | {
|
|---|
| 513 | }
|
|---|
| 514 |
|
|---|
| 515 | static inline void iommu_put_resv_regions(struct device *dev,
|
|---|
| 516 | struct list_head *list)
|
|---|
| 517 | {
|
|---|
| 518 | }
|
|---|
| 519 |
|
|---|
| 520 | static inline int iommu_get_group_resv_regions(struct iommu_group *group,
|
|---|
| 521 | struct list_head *head)
|
|---|
| 522 | {
|
|---|
| 523 | return -ENODEV;
|
|---|
| 524 | }
|
|---|
| 525 |
|
|---|
| 526 | static inline int iommu_request_dm_for_dev(struct device *dev)
|
|---|
| 527 | {
|
|---|
| 528 | return -ENODEV;
|
|---|
| 529 | }
|
|---|
| 530 |
|
|---|
| 531 | static inline int iommu_attach_group(struct iommu_domain *domain,
|
|---|
| 532 | struct iommu_group *group)
|
|---|
| 533 | {
|
|---|
| 534 | return -ENODEV;
|
|---|
| 535 | }
|
|---|
| 536 |
|
|---|
| 537 | static inline void iommu_detach_group(struct iommu_domain *domain,
|
|---|
| 538 | struct iommu_group *group)
|
|---|
| 539 | {
|
|---|
| 540 | }
|
|---|
| 541 |
|
|---|
| 542 | static inline struct iommu_group *iommu_group_alloc(void)
|
|---|
| 543 | {
|
|---|
| 544 | return ERR_PTR(-ENODEV);
|
|---|
| 545 | }
|
|---|
| 546 |
|
|---|
| 547 | static inline void *iommu_group_get_iommudata(struct iommu_group *group)
|
|---|
| 548 | {
|
|---|
| 549 | return NULL;
|
|---|
| 550 | }
|
|---|
| 551 |
|
|---|
| 552 | static inline void iommu_group_set_iommudata(struct iommu_group *group,
|
|---|
| 553 | void *iommu_data,
|
|---|
| 554 | void (*release)(void *iommu_data))
|
|---|
| 555 | {
|
|---|
| 556 | }
|
|---|
| 557 |
|
|---|
| 558 | static inline int iommu_group_set_name(struct iommu_group *group,
|
|---|
| 559 | const char *name)
|
|---|
| 560 | {
|
|---|
| 561 | return -ENODEV;
|
|---|
| 562 | }
|
|---|
| 563 |
|
|---|
| 564 | static inline int iommu_group_add_device(struct iommu_group *group,
|
|---|
| 565 | struct device *dev)
|
|---|
| 566 | {
|
|---|
| 567 | return -ENODEV;
|
|---|
| 568 | }
|
|---|
| 569 |
|
|---|
| 570 | static inline void iommu_group_remove_device(struct device *dev)
|
|---|
| 571 | {
|
|---|
| 572 | }
|
|---|
| 573 |
|
|---|
| 574 | static inline int iommu_group_for_each_dev(struct iommu_group *group,
|
|---|
| 575 | void *data,
|
|---|
| 576 | int (*fn)(struct device *, void *))
|
|---|
| 577 | {
|
|---|
| 578 | return -ENODEV;
|
|---|
| 579 | }
|
|---|
| 580 |
|
|---|
| 581 | static inline struct iommu_group *iommu_group_get(struct device *dev)
|
|---|
| 582 | {
|
|---|
| 583 | return NULL;
|
|---|
| 584 | }
|
|---|
| 585 |
|
|---|
| 586 | static inline void iommu_group_put(struct iommu_group *group)
|
|---|
| 587 | {
|
|---|
| 588 | }
|
|---|
| 589 |
|
|---|
| 590 | static inline int iommu_group_register_notifier(struct iommu_group *group,
|
|---|
| 591 | struct notifier_block *nb)
|
|---|
| 592 | {
|
|---|
| 593 | return -ENODEV;
|
|---|
| 594 | }
|
|---|
| 595 |
|
|---|
| 596 | static inline int iommu_group_unregister_notifier(struct iommu_group *group,
|
|---|
| 597 | struct notifier_block *nb)
|
|---|
| 598 | {
|
|---|
| 599 | return 0;
|
|---|
| 600 | }
|
|---|
| 601 |
|
|---|
| 602 | static inline int iommu_group_id(struct iommu_group *group)
|
|---|
| 603 | {
|
|---|
| 604 | return -ENODEV;
|
|---|
| 605 | }
|
|---|
| 606 |
|
|---|
| 607 | static inline int iommu_domain_get_attr(struct iommu_domain *domain,
|
|---|
| 608 | enum iommu_attr attr, void *data)
|
|---|
| 609 | {
|
|---|
| 610 | return -EINVAL;
|
|---|
| 611 | }
|
|---|
| 612 |
|
|---|
| 613 | static inline int iommu_domain_set_attr(struct iommu_domain *domain,
|
|---|
| 614 | enum iommu_attr attr, void *data)
|
|---|
| 615 | {
|
|---|
| 616 | return -EINVAL;
|
|---|
| 617 | }
|
|---|
| 618 |
|
|---|
| 619 | static inline int iommu_device_register(struct iommu_device *iommu)
|
|---|
| 620 | {
|
|---|
| 621 | return -ENODEV;
|
|---|
| 622 | }
|
|---|
| 623 |
|
|---|
| 624 | static inline void iommu_device_set_ops(struct iommu_device *iommu,
|
|---|
| 625 | const struct iommu_ops *ops)
|
|---|
| 626 | {
|
|---|
| 627 | }
|
|---|
| 628 |
|
|---|
| 629 | static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
|
|---|
| 630 | struct fwnode_handle *fwnode)
|
|---|
| 631 | {
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 | static inline struct iommu_device *dev_to_iommu_device(struct device *dev)
|
|---|
| 635 | {
|
|---|
| 636 | return NULL;
|
|---|
| 637 | }
|
|---|
| 638 |
|
|---|
| 639 | static inline void iommu_device_unregister(struct iommu_device *iommu)
|
|---|
| 640 | {
|
|---|
| 641 | }
|
|---|
| 642 |
|
|---|
| 643 | static inline int iommu_device_sysfs_add(struct iommu_device *iommu,
|
|---|
| 644 | struct device *parent,
|
|---|
| 645 | const struct attribute_group **groups,
|
|---|
| 646 | const char *fmt, ...)
|
|---|
| 647 | {
|
|---|
| 648 | return -ENODEV;
|
|---|
| 649 | }
|
|---|
| 650 |
|
|---|
| 651 | static inline void iommu_device_sysfs_remove(struct iommu_device *iommu)
|
|---|
| 652 | {
|
|---|
| 653 | }
|
|---|
| 654 |
|
|---|
| 655 | static inline int iommu_device_link(struct device *dev, struct device *link)
|
|---|
| 656 | {
|
|---|
| 657 | return -EINVAL;
|
|---|
| 658 | }
|
|---|
| 659 |
|
|---|
| 660 | static inline void iommu_device_unlink(struct device *dev, struct device *link)
|
|---|
| 661 | {
|
|---|
| 662 | }
|
|---|
| 663 |
|
|---|
| 664 | static inline int iommu_fwspec_init(struct device *dev,
|
|---|
| 665 | struct fwnode_handle *iommu_fwnode,
|
|---|
| 666 | const struct iommu_ops *ops)
|
|---|
| 667 | {
|
|---|
| 668 | return -ENODEV;
|
|---|
| 669 | }
|
|---|
| 670 |
|
|---|
| 671 | static inline void iommu_fwspec_free(struct device *dev)
|
|---|
| 672 | {
|
|---|
| 673 | }
|
|---|
| 674 |
|
|---|
| 675 | static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
|
|---|
| 676 | int num_ids)
|
|---|
| 677 | {
|
|---|
| 678 | return -ENODEV;
|
|---|
| 679 | }
|
|---|
| 680 |
|
|---|
| 681 | static inline
|
|---|
| 682 | const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
|
|---|
| 683 | {
|
|---|
| 684 | return NULL;
|
|---|
| 685 | }
|
|---|
| 686 |
|
|---|
| 687 | #endif /* CONFIG_IOMMU_API */
|
|---|
| 688 |
|
|---|
| 689 | #ifdef CONFIG_IOMMU_DEBUGFS
|
|---|
| 690 | extern struct dentry *iommu_debugfs_dir;
|
|---|
| 691 | void iommu_debugfs_setup(void);
|
|---|
| 692 | #else
|
|---|
| 693 | static inline void iommu_debugfs_setup(void) {}
|
|---|
| 694 | #endif
|
|---|
| 695 |
|
|---|
| 696 | #endif /* __LINUX_IOMMU_H */
|
|---|
