pci_p2pdma_add_resource
rc = pci_p2pdma_add_resource(hdev->pdev, p2pr->bar, p2pr->size, p2pr->bar_offset);
if (pci_p2pdma_add_resource(pdev, bar, size, offset)) {
EXPORT_SYMBOL_GPL(pci_p2pdma_add_resource);
int pci_p2pdma_add_resource(struct pci_dev *pdev, int bar, size_t size,