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/*
* ARM SMMU Support
*
* Copyright (C) 2015-2016 Broadcom Corporation
* Copyright (c) 2017 Red Hat, Inc.
* Written by Prem Mallappa, Eric Auger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef HW_ARM_SMMU_COMMON_H
#define HW_ARM_SMMU_COMMON_H
#include "hw/sysbus.h"
#include "hw/pci/pci.h"
#define SMMU_PCI_BUS_MAX 256
#define SMMU_PCI_DEVFN_MAX 256
#define SMMU_MAX_VA_BITS 48
/*
* Page table walk error types
*/
typedef enum {
SMMU_PTW_ERR_NONE,
SMMU_PTW_ERR_WALK_EABT, /* Translation walk external abort */
SMMU_PTW_ERR_TRANSLATION, /* Translation fault */
SMMU_PTW_ERR_ADDR_SIZE, /* Address Size fault */
SMMU_PTW_ERR_ACCESS, /* Access fault */
SMMU_PTW_ERR_PERMISSION, /* Permission fault */
} SMMUPTWEventType;
typedef struct SMMUPTWEventInfo {
SMMUPTWEventType type;
dma_addr_t addr; /* fetched address that induced an abort, if any */
} SMMUPTWEventInfo;
typedef struct SMMUTransTableInfo {
bool disabled; /* is the translation table disabled? */
uint64_t ttb; /* TT base address */
uint8_t tsz; /* input range, ie. 2^(64 -tsz)*/
uint8_t granule_sz; /* granule page shift */
} SMMUTransTableInfo;
/*
* Generic structure populated by derived SMMU devices
* after decoding the configuration information and used as
* input to the page table walk
*/
typedef struct SMMUTransCfg {
int stage; /* translation stage */
bool aa64; /* arch64 or aarch32 translation table */
bool disabled; /* smmu is disabled */
bool bypassed; /* translation is bypassed */
bool aborted; /* translation is aborted */
uint64_t ttb; /* TT base address */
uint8_t oas; /* output address width */
uint8_t tbi; /* Top Byte Ignore */
uint16_t asid;
SMMUTransTableInfo tt[2];
} SMMUTransCfg;
typedef struct SMMUDevice {
void *smmu;
PCIBus *bus;
int devfn;
IOMMUMemoryRegion iommu;
AddressSpace as;
} SMMUDevice;
typedef struct SMMUNotifierNode {
SMMUDevice *sdev;
QLIST_ENTRY(SMMUNotifierNode) next;
} SMMUNotifierNode;
typedef struct SMMUPciBus {
PCIBus *bus;
SMMUDevice *pbdev[0]; /* Parent array is sparse, so dynamically alloc */
} SMMUPciBus;
typedef struct SMMUState {
/* <private> */
SysBusDevice dev;
const char *mrtypename;
MemoryRegion iomem;
GHashTable *smmu_pcibus_by_busptr;
GHashTable *configs; /* cache for configuration data */
GHashTable *iotlb;
SMMUPciBus *smmu_pcibus_by_bus_num[SMMU_PCI_BUS_MAX];
PCIBus *pci_bus;
QLIST_HEAD(, SMMUNotifierNode) notifiers_list;
uint8_t bus_num;
PCIBus *primary_bus;
} SMMUState;
typedef struct {
/* <private> */
SysBusDeviceClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
} SMMUBaseClass;
#define TYPE_ARM_SMMU "arm-smmu"
#define ARM_SMMU(obj) OBJECT_CHECK(SMMUState, (obj), TYPE_ARM_SMMU)
#define ARM_SMMU_CLASS(klass) \
OBJECT_CLASS_CHECK(SMMUBaseClass, (klass), TYPE_ARM_SMMU)
#define ARM_SMMU_GET_CLASS(obj) \
OBJECT_GET_CLASS(SMMUBaseClass, (obj), TYPE_ARM_SMMU)
/* Return the SMMUPciBus handle associated to a PCI bus number */
SMMUPciBus *smmu_find_smmu_pcibus(SMMUState *s, uint8_t bus_num);
/* Return the stream ID of an SMMU device */
static inline uint16_t smmu_get_sid(SMMUDevice *sdev)
{
return PCI_BUILD_BDF(pci_bus_num(sdev->bus), sdev->devfn);
}
/**
* smmu_ptw - Perform the page table walk for a given iova / access flags
* pair, according to @cfg translation config
*/
int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
IOMMUTLBEntry *tlbe, SMMUPTWEventInfo *info);
/**
* select_tt - compute which translation table shall be used according to
* the input iova and translation config and return the TT specific info
*/
SMMUTransTableInfo *select_tt(SMMUTransCfg *cfg, dma_addr_t iova);
#endif /* HW_ARM_SMMU_COMMON */
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