On 10/5/2018 10:02 AM, Rafal Kozik wrote:
> Add instruction how to bind ENA to VFIO-PCI driver.
>
> Fixes: cf8a122c296a ("ena: introduce documentation")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Zorik Machulsky <zo...@amazon.com>
> Signed-off-by: Rafal Kozik <r...@semihalf.com>
> Acked-by: Michal Krawczyk <m...@semihalf.com>
> ---
> doc/guides/nics/ena.rst | 12 +++++++++---
> doc/guides/nics/features/ena.ini | 1 +
> 2 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/doc/guides/nics/ena.rst b/doc/guides/nics/ena.rst
> index d19912e..0dfefc6 100644
> --- a/doc/guides/nics/ena.rst
> +++ b/doc/guides/nics/ena.rst
> @@ -187,11 +187,17 @@ Prerequisites
> -------------
>
> #. Prepare the system as recommended by DPDK suite. This includes
> environment
> - variables, hugepages configuration, tool-chains and configuration
> + variables, hugepages configuration, tool-chains and configuration.
>
> -#. Insert igb_uio kernel module using the command 'modprobe igb_uio'
> +#. ENA PMD can operate with vfio-pci or igb_uio driver.
>
> -#. Bind the intended ENA device to igb_uio module
> +#. Insert vfio-pci or igb_uio kernel module using the command
> + 'modprobe vfio-pci' or 'modprobe igb_uio' respectively.
Unless installed "igb_uio" won't be available to use with "modprobe", not sure
about adding that detail, what do you think?
> +
> +#. If vfio-pci driver is used please make sure noiommu mode is enabled:
> + echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
This is only required if there is no iommu on the system, right? Won't ena will
work without this parameter on the system that has iommu?
> +
> +#. Bind the intended ENA device to vfio-pci or igb_uio module.
>
>
> At this point the system should be ready to run DPDK applications. Once the
> diff --git a/doc/guides/nics/features/ena.ini
> b/doc/guides/nics/features/ena.ini
> index 691c1e3..aa6f05a 100644
> --- a/doc/guides/nics/features/ena.ini
> +++ b/doc/guides/nics/features/ena.ini
> @@ -23,5 +23,6 @@ Inner L4 checksum = Y
> Basic stats = Y
> Extended stats = Y
> Linux UIO = Y
> +Linux VFIO = Y
> x86-32 = Y
> x86-64 = Y
>
