From cac994ef43b128c80c56b4cd4dd9d8af0f95da3f Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Fri, 4 May 2018 18:05:51 +0100 Subject: hw/arm/smmu-common: IOMMU memory region and address space setup We set up the infrastructure to enumerate all the PCI devices attached to the SMMU and create an associated IOMMU memory region and address space. Those info are stored in SMMUDevice objects. The devices are grouped according to the PCIBus they belong to. A hash table indexed by the PCIBus pointer is used. Also an array indexed by the bus number allows to find the list of SMMUDevices. Signed-off-by: Eric Auger Signed-off-by: Prem Mallappa Reviewed-by: Peter Maydell Message-id: 1524665762-31355-3-git-send-email-eric.auger@redhat.com Signed-off-by: Peter Maydell --- hw/arm/smmu-common.c | 69 ++++++++++++++++++++++++++++++++++++++++++++ hw/arm/trace-events | 3 ++ include/hw/arm/smmu-common.h | 8 +++++ 3 files changed, 80 insertions(+) diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c index e086ff52a5..3d64bcfac2 100644 --- a/hw/arm/smmu-common.c +++ b/hw/arm/smmu-common.c @@ -28,8 +28,69 @@ #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; @@ -38,6 +99,14 @@ static void smmu_base_realize(DeviceState *dev, Error **errp) 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) diff --git a/hw/arm/trace-events b/hw/arm/trace-events index 193063ed99..8e8b53c95d 100644 --- a/hw/arm/trace-events +++ b/hw/arm/trace-events @@ -2,3 +2,6 @@ # hw/arm/virt-acpi-build.c virt_acpi_setup(void) "No fw cfg or ACPI disabled. Bailing out." + +# hw/arm/smmu-common.c +smmu_add_mr(const char *name) "%s" \ No newline at end of file diff --git a/include/hw/arm/smmu-common.h b/include/hw/arm/smmu-common.h index d682be82d2..8b947774b0 100644 --- a/include/hw/arm/smmu-common.h +++ b/include/hw/arm/smmu-common.h @@ -120,4 +120,12 @@ typedef struct { #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); +} #endif /* HW_ARM_SMMU_COMMON */ -- cgit v1.2.1