AGPCMD
pci_read_config_dword(dev, cur->capndx+AGPCMD, &mcmd);
pci_write_config_dword(dev, cur->capndx+AGPCMD, mcmd);
pci_read_config_dword(cur->dev, cur->capndx+AGPCMD, &mcmd);
pci_write_config_dword(cur->dev, cur->capndx+AGPCMD, mcmd);