libnvme_write_reg32(9) libnvme API manual libnvme_write_reg32(9)

libnvme_write_reg32 - Write a 32-bit controller register of a PCIe controller

int libnvme_write_reg32 (struct libnvme_transport_handle *hdl , __u32 offset , __u32 value );

Transport handle
Offset of the register in bytes
Value to write

This should only be sent to controller handles, not to namespaces.

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

libnvme_write_reg32 October 2026