doc: add VFIO in ENA guide

Add instruction how to bind ENA to VFIO-PCI driver.

Fixes: cf8a122c296a ("ena: introduce documentation")
Cc: stable@dpdk.org
Signed-off-by: Zorik Machulsky <zorik@amazon.com>
Signed-off-by: Rafal Kozik <rk@semihalf.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>

diff --git a/doc/guides/nics/ena.rst b/doc/guides/nics/ena.rst
index d19912e..695960d 100644 (file)
--- a/doc/guides/nics/ena.rst
+++ b/doc/guides/nics/ena.rst
@@ -187,11 +187,20 @@ 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.
+
+#. For ``vfio-pci`` users only:
+   Please make sure that ``IOMMU`` is enabled in your system,
+   or use ``vfio`` driver in ``noiommu`` mode::
+
+     echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
+
+#. 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 (file)
--- 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