Query: pci_request_region_exclusive
OS: centos
Section: 9
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
PCI_REQUEST_REGION_E(9) Hardware Interfaces PCI_REQUEST_REGION_E(9)NAMEpci_request_region_exclusive - Reserved PCI I/O and memory resourceSYNOPSISint pci_request_region_exclusive(struct pci_dev * pdev, int bar, const char * res_name);ARGUMENTSpdev PCI device whose resources are to be reserved bar BAR to be reserved res_name Name to be associated with resource.DESCRIPTIONMark the PCI region associated with PCI device pdev BR bar as being reserved by owner res_name. Do not access any address inside the PCI regions unless this call returns successfully. Returns 0 on success, or EBUSY on error. A warning message is also printed on failure. The key difference that _exclusive makes it that userspace is explicitly not allowed to map the resource via /dev/mem or sysfs.COPYRIGHTKernel Hackers Manual 3.10 June 2014 PCI_REQUEST_REGION_E(9)
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