genode/repos/os/src/drivers/nvme
Josef Söntgen 04516a0d39 nvme_drv: add driver for NVMe storage devices
This driver component provides support for using consumer NVMe storage
devices, i.e. it omits name space managment and will always use the
first name space, on Genode. For now it defaults to a reasonable low
configuration:

  -    1 I/O queue (completion/submission tuple)
  -  128 entries in the I/O queue
  - 4096 as the only I/O transaction memory page size

Fixes #2747.
2018-04-19 12:38:22 +02:00
..
main.cc nvme_drv: add driver for NVMe storage devices 2018-04-19 12:38:22 +02:00
pci.h nvme_drv: add driver for NVMe storage devices 2018-04-19 12:38:22 +02:00
README nvme_drv: add driver for NVMe storage devices 2018-04-19 12:38:22 +02:00
target.mk nvme_drv: add driver for NVMe storage devices 2018-04-19 12:38:22 +02:00
util.h nvme_drv: add driver for NVMe storage devices 2018-04-19 12:38:22 +02:00

This directory contains the implementation of a NVMe driver component.


Brief
=====

The driver supports PCIe NVMe devices matching at least revision 1.1 of
the NVMe specification. For now it only supports one name space and uses
one completion and one submission queue to handle all I/O requests; one
request is limited to 1MiB of data. It lacks any name space management
functionality.


Configuration
=============

The following config illustrates how the driver is configured:

!<start name="nvme_drv">
!  <resource name="ram" quantum="8M"/>
!  <provides><service name="Block"/></provides>
!  <config>
!    <policy label_prefix="client1" writeable="yes"/>
!  </config>
!</start>


Report
======

The driver supports reporting of active name spaces, which can be enabled
via the configuration 'report' sub-node:

!<report namespace="yes"/>

The report structure is depicted by the following example:

!<controller model="QEMU NVMe Ctrl" serial="FNRD">
! <namespace id="0" block_count="32768" block_size="512"/>
!</controller>