Commit 43864069 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

pci: add helper to retrieve the 64-bit range 



Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent c5a22c43

hw/pci/pci.c

+50 −0
Original line number Diff line number Diff line
@@ -2257,6 +2257,56 @@ void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) 
    bus->iommu_opaque = opaque;

}



static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)

{

    Range *range = opaque;

    PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev);

    uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND);

    int r;



    if (!(cmd & PCI_COMMAND_MEMORY)) {

        return;

    }



    if (pc->is_bridge) {

        pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);

        pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH);



        base = MAX(base, 0x1ULL << 32);



        if (limit >= base) {

            Range pref_range;

            pref_range.begin = base;

            pref_range.end = limit + 1;

            range_extend(range, &pref_range);

        }

    }

    for (r = 0; r < PCI_NUM_REGIONS; ++r) {

        PCIIORegion *region = &dev->io_regions[r];

        Range region_range;



        if (!region->size ||

            (region->type & PCI_BASE_ADDRESS_SPACE_IO) ||

            !(region->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) {

            continue;

        }

        region_range.begin = pci_get_quad(dev->config + pci_bar(dev, r));

        region_range.end = region_range.begin + region->size;



        region_range.begin = MAX(region_range.begin, 0x1ULL << 32);



        if (region_range.end - 1 >= region_range.begin) {

            range_extend(range, &region_range);

        }

    }

}



void pci_bus_get_w64_range(PCIBus *bus, Range *range)

{

    range->begin = range->end = 0;

    pci_for_each_device_under_bus(bus, pci_dev_get_w64, range);

}



static const TypeInfo pci_device_type_info = {

    .name = TYPE_PCI_DEVICE,

    .parent = TYPE_DEVICE,

include/hw/pci/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -397,6 +397,7 @@ const char *pci_root_bus_path(PCIDevice *dev); 
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);

int pci_qdev_find_device(const char *id, PCIDevice **pdev);

PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr);

void pci_bus_get_w64_range(PCIBus *bus, Range *range);



int pci_parse_devaddr(const char *addr, int *domp, int *busp,

                      unsigned int *slotp, unsigned int *funcp);