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PCI_MSI_VEC_COUNT(9) | Hardware Interfaces | PCI_MSI_VEC_COUNT(9) |
NAME¶
pci_msi_vec_count - Return the number of MSI vectors a device can sendSYNOPSIS¶
int
pci_msi_vec_count(struct pci_dev * dev);
ARGUMENTS¶
devdevice to report about
DESCRIPTION¶
This function returns the number of MSI vectors a device requested via Multiple Message Capable register. It returns a negative errno if the device is not capable sending MSI interrupts. Otherwise, the call succeeds and returns a power of two, up to a maximum of 2^5 (32), according to the MSI specification.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |