net/ena: support Rx interrupt

[dpdk.git] / doc / guides / nics / ena.rst

diff --git a/doc/guides/nics/ena.rst b/doc/guides/nics/ena.rst
index 0f1f63f..6395109 100644 (file)
--- a/doc/guides/nics/ena.rst
+++ b/doc/guides/nics/ena.rst
@@ -141,6 +141,7 @@ Supported features
 * LSC event notification
 * Watchdog (requires handling of timers in the application)
 * Device reset upon failure
+* Rx interrupts
 
 Prerequisites
 -------------
@@ -180,6 +181,17 @@ At this point the system should be ready to run DPDK applications. Once the
 application runs to completion, the ENA can be detached from attached module if
 necessary.
 
+**Rx interrupts support**
+
+ENA PMD supports Rx interrupts, which can be used to wake up lcores waiting for
+input. Please note that it won't work with ``igb_uio``, so to use this feature,
+the ``vfio-pci`` should be used.
+
+ENA handles admin interrupts and AENQ notifications on separate interrupt.
+There is possibility that there won't be enough event file descriptors to
+handle both admin and Rx interrupts. In that situation the Rx interrupt request
+will fail.
+
 **Note about usage on \*.metal instances**
 
 On AWS, the metal instances are supporting IOMMU for both arm64 and x86_64