ena: add polling-mode driver

This is a PMD for the Amazon ethernet ENA (Elastic Network Adapters)
family.
The driver operates variety of ENA adapters through feature negotiation
with the adapter and upgradable commands set.
ENA driver handles PCI Physical and Virtual ENA functions.

Signed-off-by: Evgeny Schemeilin <evgenys@amazon.com>
Signed-off-by: Jan Medala <jan@semihalf.com>
Signed-off-by: Jakub Palider <jpa@semihalf.com>

Release Note addition:
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>

config/common_base

@@ -134,6 +134,16 @@ CONFIG_RTE_ETHDEV_RXTX_CALLBACKS=y
 #
 CONFIG_RTE_NIC_BYPASS=n
 
+#
+# Compile burst-oriented Amazon ENA PMD driver
+#
+CONFIG_RTE_LIBRTE_ENA_PMD=y
+CONFIG_RTE_LIBRTE_ENA_DEBUG_RX=n
+CONFIG_RTE_LIBRTE_ENA_DEBUG_TX=n
+CONFIG_RTE_LIBRTE_ENA_DEBUG_TX_FREE=n
+CONFIG_RTE_LIBRTE_ENA_DEBUG_DRIVER=n
+CONFIG_RTE_LIBRTE_ENA_COM_DEBUG=n
+
 #
 # Compile burst-oriented IGB & EM PMD drivers
 #

doc/guides/rel_notes/release_16_04.rst

@@ -47,6 +47,12 @@ This section should contain new features added in this release. Sample format:
   A new function ``rte_pktmbuf_alloc_bulk()`` has been added to allow the user
   to allocate a bulk of mbufs.
 
+* **Added new poll-mode driver for Amazon Elastic Network Adapters (ENA).**
+
+  The driver operates variety of ENA adapters through feature negotiation
+  with the adapter and upgradable commands set.
+  ENA driver handles PCI Physical and Virtual ENA functions.
+
 * **Restored vmxnet3 Tx data ring.**
 
   Tx data ring has been shown to improve small pkt forwarding performance

drivers/net/Makefile

@@ -36,6 +36,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_BNX2X_PMD) += bnx2x
 DIRS-$(CONFIG_RTE_LIBRTE_PMD_BOND) += bonding
 DIRS-$(CONFIG_RTE_LIBRTE_CXGBE_PMD) += cxgbe
 DIRS-$(CONFIG_RTE_LIBRTE_E1000_PMD) += e1000
+DIRS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += ena
 DIRS-$(CONFIG_RTE_LIBRTE_ENIC_PMD) += enic
 DIRS-$(CONFIG_RTE_LIBRTE_FM10K_PMD) += fm10k
 DIRS-$(CONFIG_RTE_LIBRTE_I40E_PMD) += i40e

drivers/net/ena/Makefile

@@ -0,0 +1,61 @@
+#
+# BSD LICENSE
+#
+# Copyright (c) 2015-2016 Amazon.com, Inc. or its affiliates.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of copyright holder nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+#
+# library name
+#
+LIB = librte_pmd_ena.a
+CFLAGS += $(WERROR_FLAGS) -O2
+INCLUDES :=-I$(SRCDIR) -I$(SRCDIR)/base/ena_defs -I$(SRCDIR)/base
+
+EXPORT_MAP := rte_pmd_ena_version.map
+LIBABIVER := 1
+
+VPATH += $(SRCDIR)/base
+#
+# all source are stored in SRCS-y
+#
+SRCS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += ena_ethdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += ena_com.c
+SRCS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += ena_eth_com.c
+
+# this lib depends upon:
+DEPDIRS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += lib/librte_eal lib/librte_ether
+DEPDIRS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += lib/librte_mempool lib/librte_mbuf
+DEPDIRS-$(CONFIG_RTE_LIBRTE_ENA_PMD) += lib/librte_net lib/librte_malloc
+
+CFLAGS += $(INCLUDES)
+
+include $(RTE_SDK)/mk/rte.lib.mk