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pci: add helper to retrieve the 64-bit range 

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2013-09-02 11:37:02 +03:00
parent c5a22c4344
commit 4386406957
2 changed files with 51 additions and 0 deletions
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50
hw/pci/pci.c
View File

@ -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,

1
include/hw/pci/pci.h
View File

@ -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);