blob: 5ec2e6c1a43d3178976ea15f51287156190e0c78 [file] [log] [blame]
/*
* 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"
#include "qom/object.h"
#define SMMU_PCI_BUS_MAX 256
#define SMMU_PCI_DEVFN_MAX 256
#define SMMU_PCI_DEVFN(sid) (sid & 0xFF)
/* VMSAv8-64 Translation constants and functions */
#define VMSA_LEVELS 4
#define VMSA_MAX_S2_CONCAT 16
#define VMSA_STRIDE(gran) ((gran) - VMSA_LEVELS + 1)
#define VMSA_BIT_LVL(isz, strd, lvl) ((isz) - (strd) * \
(VMSA_LEVELS - (lvl)))
#define VMSA_IDXMSK(isz, strd, lvl) ((1ULL << \
VMSA_BIT_LVL(isz, strd, lvl)) - 1)
/*
* 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 {
int stage;
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 */
bool had; /* hierarchical attribute disable */
} SMMUTransTableInfo;
typedef struct SMMUTLBEntry {
IOMMUTLBEntry entry;
uint8_t level;
uint8_t granule;
} SMMUTLBEntry;
/* Stage-2 configuration. */
typedef struct SMMUS2Cfg {
uint8_t tsz; /* Size of IPA input region (S2T0SZ) */
uint8_t sl0; /* Start level of translation (S2SL0) */
bool affd; /* AF Fault Disable (S2AFFD) */
bool record_faults; /* Record fault events (S2R) */
uint8_t granule_sz; /* Granule page shift (based on S2TG) */
uint8_t eff_ps; /* Effective PA output range (based on S2PS) */
uint16_t vmid; /* Virtual Machine ID (S2VMID) */
uint64_t vttb; /* Address of translation table base (S2TTB) */
} SMMUS2Cfg;
/*
* Generic structure populated by derived SMMU devices
* after decoding the configuration information and used as
* input to the page table walk
*/
typedef struct SMMUTransCfg {
/* Shared fields between stage-1 and stage-2. */
int stage; /* translation stage */
bool disabled; /* smmu is disabled */
bool bypassed; /* translation is bypassed */
bool aborted; /* translation is aborted */
bool affd; /* AF fault disable */
uint32_t iotlb_hits; /* counts IOTLB hits */
uint32_t iotlb_misses; /* counts IOTLB misses*/
/* Used by stage-1 only. */
bool aa64; /* arch64 or aarch32 translation table */
bool record_faults; /* record fault events */
uint64_t ttb; /* TT base address */
uint8_t oas; /* output address width */
uint8_t tbi; /* Top Byte Ignore */
uint16_t asid;
SMMUTransTableInfo tt[2];
/* Used by stage-2 only. */
struct SMMUS2Cfg s2cfg;
} SMMUTransCfg;
typedef struct SMMUDevice {
void *smmu;
PCIBus *bus;
int devfn;
IOMMUMemoryRegion iommu;
AddressSpace as;
uint32_t cfg_cache_hits;
uint32_t cfg_cache_misses;
QLIST_ENTRY(SMMUDevice) next;
} SMMUDevice;
typedef struct SMMUPciBus {
PCIBus *bus;
SMMUDevice *pbdev[]; /* Parent array is sparse, so dynamically alloc */
} SMMUPciBus;
typedef struct SMMUIOTLBKey {
uint64_t iova;
uint16_t asid;
uint16_t vmid;
uint8_t tg;
uint8_t level;
} SMMUIOTLBKey;
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(, SMMUDevice) devices_with_notifiers;
uint8_t bus_num;
PCIBus *primary_bus;
};
struct SMMUBaseClass {
/* <private> */
SysBusDeviceClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
};
#define TYPE_ARM_SMMU "arm-smmu"
OBJECT_DECLARE_TYPE(SMMUState, SMMUBaseClass, 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,
SMMUTLBEntry *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);
/* Return the iommu mr associated to @sid, or NULL if none */
IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t sid);
#define SMMU_IOTLB_MAX_SIZE 256
SMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg,
SMMUTransTableInfo *tt, hwaddr iova);
void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, SMMUTLBEntry *entry);
SMMUIOTLBKey smmu_get_iotlb_key(uint16_t asid, uint16_t vmid, uint64_t iova,
uint8_t tg, uint8_t level);
void smmu_iotlb_inv_all(SMMUState *s);
void smmu_iotlb_inv_asid(SMMUState *s, uint16_t asid);
void smmu_iotlb_inv_vmid(SMMUState *s, uint16_t vmid);
void smmu_iotlb_inv_iova(SMMUState *s, int asid, int vmid, dma_addr_t iova,
uint8_t tg, uint64_t num_pages, uint8_t ttl);
/* Unmap the range of all the notifiers registered to any IOMMU mr */
void smmu_inv_notifiers_all(SMMUState *s);
#endif /* HW_ARM_SMMU_COMMON_H */