table of contents
| PCI_REQUEST_REGION_E(9) | Hardware Interfaces | PCI_REQUEST_REGION_E(9) |
NAME¶
pci_request_region_exclusive - Reserved PCI I/O and memory resource
SYNOPSIS¶
int pci_request_region_exclusive(struct pci_dev * pdev, int bar, const char * res_name);
ARGUMENTS¶
pdev
PCI device whose resources are to be reserved
bar
BAR to be reserved
res_name
Name to be associated with resource.
DESCRIPTION¶
Mark 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.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |