---
name: "libnvme_write_reg32-libnvme3"
section: "2"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libnvme_write_reg32-libnvme3"
---

# libnvme\_write\_reg32-libnvme3(2)

Write a 32-bit controller register of a PCIe controller

## NAME

libnvme\_write\_reg32 - Write a 32-bit controller register of a PCIe controller

## SYNOPSIS

**int libnvme\_write\_reg32** **(struct libnvme\_transport\_handle \*hdl** *,* **\_\_u32 offset** *,* **\_\_u32 value** *);*

## ARGUMENTS

- hdl

  Transport handle

- offset

  Offset of the register in bytes

- value

  Value to write

## DESCRIPTION

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.