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enable_msix

strat9_kernel::arch::x86_64::msi

Function enable_msix 

Source 
fn enable_msix(pci_dev: &PciDevice, vector: u8) -> bool
Expand description

Try to enable MSI-X on pci_dev with vector using the first table entry.

MSI-X requires access to the device’s BAR space for the vector table. This function maps the table BAR if not already mapped, programs the first table entry with the MSI message address/data, then enables MSI-X.

Returns true on success, false if MSI-X is not supported or programming failed.

§Safety

The caller must ensure that the BAR containing the MSI-X table is already identity-mapped (or mapped via the kernel’s phys-to-virt window), otherwise the table writes will fault.