Commit cac994ef authored by Eric Auger's avatar Eric Auger Committed by Peter Maydell
Browse files

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: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarPrem Mallappa <prem.mallappa@broadcom.com>
Reviewed-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Message-id: 1524665762-31355-3-git-send-email-eric.auger@redhat.com
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 527773ee

hw/arm/smmu-common.c

+69 −0
Original line number Diff line number Diff line
@@ -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)

hw/arm/trace-events

+3 −0
Original line number Diff line number Diff line
@@ -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

include/hw/arm/smmu-common.h

+8 −0
Original line number Diff line number Diff line
@@ -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 */