libnvme_write_reg64(9)        libnvme API manual        libnvme_write_reg64(9)

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.

October 2026                  libnvme_write_reg64       libnvme_write_reg64(9)