PCI_ATS_CTRL
pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl);
pci_read_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, &ctrl);
pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl);
pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl);
pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl);