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/*
* Copyright (C) 2014-2016 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.
*
* Author: Prem Mallappa <pmallapp@broadcom.com>
*
*/
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "exec/address-spaces.h"
#include "trace.h"
#include "exec/target_page.h"
#include "qom/cpu.h"
#include "hw/qdev-properties.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/arm/smmu-common.h"
/**
* The bus number is used for lookup when SID based invalidation occurs.
* In that case we lazily populate the SMMUPciBus array from the bus hash
* table. At the time the SMMUPciBus is created (smmu_find_add_as), the bus
* numbers may not be always initialized yet.
*/
SMMUPciBus *smmu_find_smmu_pcibus(SMMUState *s, uint8_t bus_num)
{
SMMUPciBus *smmu_pci_bus = s->smmu_pcibus_by_bus_num[bus_num];
if (!smmu_pci_bus) {
GHashTableIter iter;
g_hash_table_iter_init(&iter, s->smmu_pcibus_by_busptr);
while (g_hash_table_iter_next(&iter, NULL, (void **)&smmu_pci_bus)) {
if (pci_bus_num(smmu_pci_bus->bus) == bus_num) {
s->smmu_pcibus_by_bus_num[bus_num] = smmu_pci_bus;
return smmu_pci_bus;
}
}
}
return smmu_pci_bus;
}
static AddressSpace *smmu_find_add_as(PCIBus *bus, void *opaque, int devfn)
{
SMMUState *s = opaque;
SMMUPciBus *sbus = g_hash_table_lookup(s->smmu_pcibus_by_busptr, bus);
SMMUDevice *sdev;
if (!sbus) {
sbus = g_malloc0(sizeof(SMMUPciBus) +
sizeof(SMMUDevice *) * SMMU_PCI_DEVFN_MAX);
sbus->bus = bus;
g_hash_table_insert(s->smmu_pcibus_by_busptr, bus, sbus);
}
sdev = sbus->pbdev[devfn];
if (!sdev) {
char *name = g_strdup_printf("%s-%d-%d",
s->mrtypename,
pci_bus_num(bus), devfn);
sdev = sbus->pbdev[devfn] = g_new0(SMMUDevice, 1);
sdev->smmu = s;
sdev->bus = bus;
sdev->devfn = devfn;
memory_region_init_iommu(&sdev->iommu, sizeof(sdev->iommu),
s->mrtypename,
OBJECT(s), name, 1ULL << SMMU_MAX_VA_BITS);
address_space_init(&sdev->as,
MEMORY_REGION(&sdev->iommu), name);
trace_smmu_add_mr(name);
g_free(name);
}
return &sdev->as;
}
static void smmu_base_realize(DeviceState *dev, Error **errp)
{
SMMUState *s = ARM_SMMU(dev);
SMMUBaseClass *sbc = ARM_SMMU_GET_CLASS(dev);
Error *local_err = NULL;
sbc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
s->smmu_pcibus_by_busptr = g_hash_table_new(NULL, NULL);
if (s->primary_bus) {
pci_setup_iommu(s->primary_bus, smmu_find_add_as, s);
} else {
error_setg(errp, "SMMU is not attached to any PCI bus!");
}
}
static void smmu_base_reset(DeviceState *dev)
{
/* will be filled later on */
}
static Property smmu_dev_properties[] = {
DEFINE_PROP_UINT8("bus_num", SMMUState, bus_num, 0),
DEFINE_PROP_LINK("primary-bus", SMMUState, primary_bus, "PCI", PCIBus *),
DEFINE_PROP_END_OF_LIST(),
};
static void smmu_base_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SMMUBaseClass *sbc = ARM_SMMU_CLASS(klass);
dc->props = smmu_dev_properties;
device_class_set_parent_realize(dc, smmu_base_realize,
&sbc->parent_realize);
dc->reset = smmu_base_reset;
}
static const TypeInfo smmu_base_info = {
.name = TYPE_ARM_SMMU,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(SMMUState),
.class_data = NULL,
.class_size = sizeof(SMMUBaseClass),
.class_init = smmu_base_class_init,
.abstract = true,
};
static void smmu_base_register_types(void)
{
type_register_static(&smmu_base_info);
}
type_init(smmu_base_register_types)
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