## Introduction

This plugin adds support for NVMe storage hardware. Devices are enumerated from the Identify Controller data structure and can be updated with appropriate firmware file. Firmware is sent in 4kB chunks and activated on next reboot.

The device GUID is read from the vendor specific area and if not found then generated from the trimmed model string.

## Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in an unspecified binary file format.

This plugin supports the following protocol ID:

- `org.nvmexpress`

## GUID Generation

These device use the NVMe DeviceInstanceId values, e.g.

- `NVME\VEN_1179&DEV_010F`

The FRU globally unique identifier (FGUID) is also added from the CNS if set. Please refer to this document for more details on how to add support for FGUID.

Additionally, an extra instance IDs containing the version may be added.

- `NVME\VEN_1179&DEV_010F&VER_3B2QGXA7`

Additionally, an extra instance IDs containing the serial number suffix may be added.

- `NVME\VEN_1179&DEV_010F&SNSUFFIX_12345`

When the model name can be read from the controller data the instance ID also includes it:

- `NVME\VEN_1179&DEV_010F&SNSUFFIX_12345&NAME_Lexar-SSD-NM790-1TB`

Additionally, for NVMe drives with Dell vendor firmware two extra GUIDs are added:

- `STORAGE-DELL-${component-id}`

and any optional GUID saved in the vendor extension block.

## Update Behavior

The firmware is deployed when the device is in normal runtime mode, but it is only activated when the system is either restarted or in some cases shutdown.

## Quirk Use

This plugin uses the following plugin-specific quirks:

### NvmeBlockSize

The block size used for NVMe writes

Since: 1.1.3

### NvmeSerialSuffixChars

The number of characters of the serial number to use for `SNSUFFIX` in the instance ID. Defaults to 0.

Since: 2.0.17

### `Flags=force-align`

Force alignment of the firmware file.

Since 1.2.4

### `Flags=commit-ca3`

Replace, and activate immediately rather than on next reset.

Since 1.8.15

## Vendor ID Security

The vendor ID is set from the udev vendor, for example set to `NVME:0x1179`

## External Interface Access

This plugin requires ioctl `NVME_IOCTL_ADMIN_CMD` access.

## Version Considerations

This plugin has been available since fwupd version `1.1.2`.