include/hw/arm/smmu-common.h

   1 /*
   2  * ARM SMMU Support
   3  *
   4  * Copyright (C) 2015-2016 Broadcom Corporation
   5  * Copyright (c) 2017 Red Hat, Inc.
   6  * Written by Prem Mallappa, Eric Auger
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  */
  18
  19 #ifndef HW_ARM_SMMU_COMMON_H
  20 #define HW_ARM_SMMU_COMMON_H
  21
  22 #include "hw/sysbus.h"
  23 #include "hw/pci/pci.h"
  24
  25 #define SMMU_PCI_BUS_MAX      256
  26 #define SMMU_PCI_DEVFN_MAX    256
  27 #define SMMU_PCI_DEVFN(sid)   (sid & 0xFF)
  28
  29 #define SMMU_MAX_VA_BITS      48
  30
  31 /*
  32  * Page table walk error types
  33  */
  34 typedef enum {
  35     SMMU_PTW_ERR_NONE,
  36     SMMU_PTW_ERR_WALK_EABT,   /* Translation walk external abort */
  37     SMMU_PTW_ERR_TRANSLATION, /* Translation fault */
  38     SMMU_PTW_ERR_ADDR_SIZE,   /* Address Size fault */
  39     SMMU_PTW_ERR_ACCESS,      /* Access fault */
  40     SMMU_PTW_ERR_PERMISSION,  /* Permission fault */
  41 } SMMUPTWEventType;
  42
  43 typedef struct SMMUPTWEventInfo {
  44     SMMUPTWEventType type;
  45     dma_addr_t addr; /* fetched address that induced an abort, if any */
  46 } SMMUPTWEventInfo;
  47
  48 typedef struct SMMUTransTableInfo {
  49     bool disabled;             /* is the translation table disabled? */
  50     uint64_t ttb;              /* TT base address */
  51     uint8_t tsz;               /* input range, ie. 2^(64 -tsz)*/
  52     uint8_t granule_sz;        /* granule page shift */
  53 } SMMUTransTableInfo;
  54
  55 typedef struct SMMUTLBEntry {
  56     IOMMUTLBEntry entry;
  57     uint8_t level;
  58     uint8_t granule;
  59 } SMMUTLBEntry;
  60
  61 /*
  62  * Generic structure populated by derived SMMU devices
  63  * after decoding the configuration information and used as
  64  * input to the page table walk
  65  */
  66 typedef struct SMMUTransCfg {
  67     int stage;                 /* translation stage */
  68     bool aa64;                 /* arch64 or aarch32 translation table */
  69     bool disabled;             /* smmu is disabled */
  70     bool bypassed;             /* translation is bypassed */
  71     bool aborted;              /* translation is aborted */
  72     uint64_t ttb;              /* TT base address */
  73     uint8_t oas;               /* output address width */
  74     uint8_t tbi;               /* Top Byte Ignore */
  75     uint16_t asid;
  76     SMMUTransTableInfo tt[2];
  77     uint32_t iotlb_hits;       /* counts IOTLB hits for this asid */
  78     uint32_t iotlb_misses;     /* counts IOTLB misses for this asid */
  79 } SMMUTransCfg;
  80
  81 typedef struct SMMUDevice {
  82     void               *smmu;
  83     PCIBus             *bus;
  84     int                devfn;
  85     IOMMUMemoryRegion  iommu;
  86     AddressSpace       as;
  87     uint32_t           cfg_cache_hits;
  88     uint32_t           cfg_cache_misses;
  89     QLIST_ENTRY(SMMUDevice) next;
  90 } SMMUDevice;
  91
  92 typedef struct SMMUPciBus {
  93     PCIBus       *bus;
  94     SMMUDevice   *pbdev[]; /* Parent array is sparse, so dynamically alloc */
  95 } SMMUPciBus;
  96
  97 typedef struct SMMUIOTLBKey {
  98     uint64_t iova;
  99     uint16_t asid;
 100 } SMMUIOTLBKey;
 101
 102 typedef struct SMMUState {
 103     /* <private> */
 104     SysBusDevice  dev;
 105     const char *mrtypename;
 106     MemoryRegion iomem;
 107
 108     GHashTable *smmu_pcibus_by_busptr;
 109     GHashTable *configs; /* cache for configuration data */
 110     GHashTable *iotlb;
 111     SMMUPciBus *smmu_pcibus_by_bus_num[SMMU_PCI_BUS_MAX];
 112     PCIBus *pci_bus;
 113     QLIST_HEAD(, SMMUDevice) devices_with_notifiers;
 114     uint8_t bus_num;
 115     PCIBus *primary_bus;
 116 } SMMUState;
 117
 118 typedef struct {
 119     /* <private> */
 120     SysBusDeviceClass parent_class;
 121
 122     /*< public >*/
 123
 124     DeviceRealize parent_realize;
 125
 126 } SMMUBaseClass;
 127
 128 #define TYPE_ARM_SMMU "arm-smmu"
 129 #define ARM_SMMU(obj) OBJECT_CHECK(SMMUState, (obj), TYPE_ARM_SMMU)
 130 #define ARM_SMMU_CLASS(klass)                                    \
 131     OBJECT_CLASS_CHECK(SMMUBaseClass, (klass), TYPE_ARM_SMMU)
 132 #define ARM_SMMU_GET_CLASS(obj)                              \
 133     OBJECT_GET_CLASS(SMMUBaseClass, (obj), TYPE_ARM_SMMU)
 134
 135 /* Return the SMMUPciBus handle associated to a PCI bus number */
 136 SMMUPciBus *smmu_find_smmu_pcibus(SMMUState *s, uint8_t bus_num);
 137
 138 /* Return the stream ID of an SMMU device */
 139 static inline uint16_t smmu_get_sid(SMMUDevice *sdev)
 140 {
 141     return PCI_BUILD_BDF(pci_bus_num(sdev->bus), sdev->devfn);
 142 }
 143
 144 /**
 145  * smmu_ptw - Perform the page table walk for a given iova / access flags
 146  * pair, according to @cfg translation config
 147  */
 148 int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
 149              SMMUTLBEntry *tlbe, SMMUPTWEventInfo *info);
 150
 151 /**
 152  * select_tt - compute which translation table shall be used according to
 153  * the input iova and translation config and return the TT specific info
 154  */
 155 SMMUTransTableInfo *select_tt(SMMUTransCfg *cfg, dma_addr_t iova);
 156
 157 /* Return the iommu mr associated to @sid, or NULL if none */
 158 IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t sid);
 159
 160 #define SMMU_IOTLB_MAX_SIZE 256
 161
 162 SMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg, hwaddr iova);
 163 void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, SMMUTLBEntry *entry);
 164 SMMUIOTLBKey smmu_get_iotlb_key(uint16_t asid, uint64_t iova);
 165 void smmu_iotlb_inv_all(SMMUState *s);
 166 void smmu_iotlb_inv_asid(SMMUState *s, uint16_t asid);
 167 void smmu_iotlb_inv_iova(SMMUState *s, uint16_t asid, dma_addr_t iova);
 168
 169 /* Unmap the range of all the notifiers registered to any IOMMU mr */
 170 void smmu_inv_notifiers_all(SMMUState *s);
 171
 172 /* Unmap the range of all the notifiers registered to @mr */
 173 void smmu_inv_notifiers_mr(IOMMUMemoryRegion *mr);
 174
 175 #endif /* HW_ARM_SMMU_COMMON_H */