NAME

libnvme_write_reg64 - Write a 64-bit controller register of a PCIe controller

SYNOPSIS

int libnvme_write_reg64 (struct libnvme_transport_handle *hdl , __u32 offset , __u64 value , bool mmio32 );

ARGUMENTS

hdl

Transport handle

offset

Offset of the register in bytes

value

Value to write

mmio32

Write the register as two 32-bit values, low half first. Some devices do not support 64-bit MMIO.

DESCRIPTION

offset must be a multiple of 8. This should only be sent to controller handles, not to namespaces.

RETURN

0 on success or a negative error code otherwise. -ENOTSUP indicates that the transport has no memory-mapped registers.