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PCIE_BANDWIDTH_AVAIL(9) Hardware Interfaces PCIE_BANDWIDTH_AVAIL(9)

NAME

pcie_bandwidth_available - determine minimum link settings of a PCIe device and its bandwidth limitation

SYNOPSIS

u32 pcie_bandwidth_available(struct pci_dev * dev, struct pci_dev ** limiting_dev, enum pci_bus_speed * speed, enum pcie_link_width * width);

ARGUMENTS

dev

PCI device to query

limiting_dev

storage for device causing the bandwidth limitation

speed

storage for speed of limiting device

width

storage for width of limiting device

DESCRIPTION

Walk up the PCI device chain and find the point where the minimum bandwidth is available. Return the bandwidth available there and (if limiting_dev, speed, and width pointers are supplied) information about that point. The bandwidth returned is in Mb/s, i.e., megabits/second of raw bandwidth.

COPYRIGHT

June 2024 Kernel Hackers Manual 3.10