--- /dev/null
+.. 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 Amazon.com, Inc. 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.
+
+ENA Poll Mode Driver
+====================
+
+The ENA PMD is a DPDK poll-mode driver for the Amazon Elastic
+Network Adapter (ENA) family.
+
+Overview
+--------
+
+The ENA driver exposes a lightweight management interface with a
+minimal set of memory mapped registers and an extendable command set
+through an Admin Queue.
+
+The driver supports a wide range of ENA adapters, is link-speed
+independent (i.e., the same driver is used for 10GbE, 25GbE, 40GbE,
+etc.), and it negotiates and supports an extendable feature set.
+
+ENA adapters allow high speed and low overhead Ethernet traffic
+processing by providing a dedicated Tx/Rx queue pair per CPU core.
+
+The ENA driver supports industry standard TCP/IP offload features such
+as checksum offload and TCP transmit segmentation offload (TSO).
+
+Receive-side scaling (RSS) is supported for multi-core scaling.
+
+Some of the ENA devices support a working mode called Low-latency
+Queue (LLQ), which saves several more microseconds.
+
+Management Interface
+--------------------
+
+ENA management interface is exposed by means of:
+
+* Device Registers
+* Admin Queue (AQ) and Admin Completion Queue (ACQ)
+
+ENA device memory-mapped PCIe space for registers (MMIO registers)
+are accessed only during driver initialization and are not involved
+in further normal device operation.
+
+AQ is used for submitting management commands, and the
+results/responses are reported asynchronously through ACQ.
+
+ENA introduces a very small set of management commands with room for
+vendor-specific extensions. Most of the management operations are
+framed in a generic Get/Set feature command.
+
+The following admin queue commands are supported:
+
+* Create I/O submission queue
+* Create I/O completion queue
+* Destroy I/O submission queue
+* Destroy I/O completion queue
+* Get feature
+* Set feature
+* Get statistics
+
+Refer to ``ena_admin_defs.h`` for the list of supported Get/Set Feature
+properties.
+
+Data Path Interface
+-------------------
+
+I/O operations are based on Tx and Rx Submission Queues (Tx SQ and Rx
+SQ correspondingly). Each SQ has a completion queue (CQ) associated
+with it.
+
+The SQs and CQs are implemented as descriptor rings in contiguous
+physical memory.
+
+Refer to ``ena_eth_io_defs.h`` for the detailed structure of the descriptor
+
+The driver supports multi-queue for both Tx and Rx.
+
+Configuration information
+-------------------------
+
+**DPDK Configuration Parameters**
+
+ The following configuration options are available for the ENA PMD:
+
+ * **CONFIG_RTE_LIBRTE_ENA_PMD** (default y): Enables or disables inclusion
+ of the ENA PMD driver in the DPDK compilation.
+
+
+ * **CONFIG_RTE_LIBRTE_ENA_DEBUG_INIT** (default y): Enables or disables debug
+ logging of device initialization within the ENA PMD driver.
+
+ * **CONFIG_RTE_LIBRTE_ENA_DEBUG_RX** (default n): Enables or disables debug
+ logging of RX logic within the ENA PMD driver.
+
+ * **CONFIG_RTE_LIBRTE_ENA_DEBUG_TX** (default n): Enables or disables debug
+ logging of TX logic within the ENA PMD driver.
+
+ * **CONFIG_RTE_LIBRTE_ENA_COM_DEBUG** (default n): Enables or disables debug
+ logging of low level tx/rx logic in ena_com(base) within the ENA PMD driver.
+
+**ENA Configuration Parameters**
+
+ * **Number of Queues**
+
+ This is the requested number of queues upon initialization, however, the actual
+ number of receive and transmit queues to be created will be the minimum between
+ the maximal number supported by the device and number of queues requested.
+
+ * **Size of Queues**
+
+ This is the requested size of receive/transmit queues, while the actual size
+ will be the minimum between the requested size and the maximal receive/transmit
+ supported by the device.
+
+Building DPDK
+-------------
+
+See the :ref:`DPDK Getting Started Guide for Linux <linux_gsg>` for
+instructions on how to build DPDK.
+
+By default the ENA PMD library will be built into the DPDK library.
+
+For configuring and using UIO and VFIO frameworks, please also refer :ref:`the
+documentation that comes with DPDK suite <linux_gsg>`.
+
+Supported ENA adapters
+----------------------
+
+Current ENA PMD supports the following ENA adapters including:
+
+* ``1d0f:ec20`` - ENA VF
+* ``1d0f:ec21`` - ENA VF with LLQ support
+
+Supported Operating Systems
+---------------------------
+
+Any Linux distribution fulfilling the conditions described in ``System Requirements``
+section of :ref:`the DPDK documentation <linux_gsg>` or refer to *DPDK Release Notes*.
+
+Supported features
+------------------
+
+* Jumbo frames up to 9K
+* Port Hardware Statistics
+* IPv4/TCP/UDP checksum offload
+* TSO offload
+* Multiple receive and transmit queues
+* RSS
+* Low Latency Queue for Tx
+
+Unsupported features
+--------------------
+
+The features supported by the device and not yet supported by this PMD include:
+
+* Asynchronous Event Notification Queue (AENQ)
+
+Prerequisites
+-------------
+
+#. Prepare the system as recommended by DPDK suite. This includes environment
+ variables, hugepages configuration, tool-chains and configuration
+
+#. Insert igb_uio kernel module using the command 'modprobe igb_uio'
+
+#. Bind the intended ENA device to igb_uio module
+
+
+At this point the system should be ready to run DPDK applications. Once the
+application runs to completion, the ENA can be detached from igb_uio if necessary.
+
+Usage example
+-------------
+
+This section demonstrates how to launch **testpmd** with Amazon ENA
+devices managed by librte_pmd_ena.
+
+#. Load the kernel modules:
+
+ .. code-block:: console
+
+ modprobe uio
+ insmod ./x86_64-native-linuxapp-gcc/kmod/igb_uio.ko
+
+ .. note::
+
+ Currently Amazon ENA PMD driver depends on igb_uio user space I/O kernel module
+
+#. Mount and request huge pages:
+
+ .. code-block:: console
+
+ mount -t hugetlbfs nodev /mnt/hugepages
+ echo 1024 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
+
+#. Bind UIO driver to ENA device (using provided by DPDK binding tool):
+
+ .. code-block:: console
+
+ ./tools/dpdk_nic_bind.py --bind=igb_uio 0000:02:00.1
+
+#. Start testpmd with basic parameters:
+
+ .. code-block:: console
+
+ ./x86_64-native-linuxapp-gcc/app/testpmd -c 0xf -n 4 -- -i
+
+ Example output:
+
+ .. code-block:: console
+
+ [...]
+ EAL: PCI device 0000:02:00.1 on NUMA socket -1
+ EAL: probe driver: 1d0f:ec20 rte_ena_pmd
+ EAL: PCI memory mapped at 0x7f9b6c400000
+ PMD: eth_ena_dev_init(): Initializing 0:2:0.1
+ Interactive-mode selected
+ Configuring Port 0 (socket 0)
+ Port 0: 00:00:00:11:00:01
+ Checking link statuses...
+ Port 0 Link Up - speed 10000 Mbps - full-duplex
+ Done
+ testpmd>
.. table:: Features availability in networking drivers
- ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
- Feature a b b b c e e i i i i i i i i i i f f m m m n n p r s v v v x
- f n n o x 1 n 4 4 4 4 g g x x x x m m l l p f u c i z i i m e
- p x x n g 0 i 0 0 0 0 b b g g g g 1 1 x x i p l a n e r r x n
- a 2 2 d b 0 c e e e e v b b b b 0 0 4 5 p l p g d t t n v
- c x x i e 0 . v v f e e e e k k e a i i e i
- k v n . f f . v v . t o o t r
- e f g . . . f f . a . 3 t
- t v v v v v 2 v
- e e e e e e
- c c c c c c
- ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
- link status X X X X
- link status event X X
- Rx interrupt X X X X
- queue start/stop X X X X X X
- MTU update X
- jumbo frame X X X X X
- scattered Rx X X X X X X
+ ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
+ Feature a b b b c e e e i i i i i i i i i i f f m m m n n p r s v v v x
+ f n n o x 1 n n 4 4 4 4 g g x x x x m m l l p f u c i z i i m e
+ p x x n g 0 a i 0 0 0 0 b b g g g g 1 1 x x i p l a n e r r x n
+ a 2 2 d b 0 c e e e e v b b b b 0 0 4 5 p l p g d t t n v
+ c x x i e 0 . v v f e e e e k k e a i i e i
+ k v n . f f . v v . t o o t r
+ e f g . . . f f . a . 3 t
+ t v v v v v 2 v
+ e e e e e e
+ c c c c c c
+ ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
+ link status X X X X
+ link status event X X
+ Rx interrupt X X X X
+ queue start/stop X X X X X X X
+ MTU update X X
+ jumbo frame X X X X X X
+ scattered Rx X X X X X X X
LRO
- TSO X X X X X
- promiscuous mode X X X X X X
- allmulticast mode X X X X X X
- unicast MAC filter X X X X
- multicast MAC filter X X X X
- RSS hash X X X X X
- RSS key update X X X X
- RSS reta update X X X X
- VMDq X X
- SR-IOV X X
- DCB X X
- VLAN filter X X X X
- ethertype filter X X
+ TSO X X X X X X
+ promiscuous mode X X X X X X
+ allmulticast mode X X X X X X
+ unicast MAC filter X X X X
+ multicast MAC filter X X X X
+ RSS hash X X X X X X
+ RSS key update X X X X X
+ RSS reta update X X X X X
+ VMDq X X
+ SR-IOV X X X
+ DCB X X
+ VLAN filter X X X X
+ ethertype filter X X
n-tuple filter
SYN filter
- tunnel filter X X
+ tunnel filter X X
flexible filter
- hash filter X X X X
- flow director X X
- flow control X X X
+ hash filter X X X X
+ flow director X X
+ flow control X X X
rate limitation
- traffic mirroring X X
- CRC offload X X X
- VLAN offload X X X
- QinQ offload X X
- L3 checksum offload X X X
- L4 checksum offload X X X
- inner L3 checksum X X
- inner L4 checksum X X
- packet type parsing X X X
- timesync X X
- basic stats X X X X X X
- extended stats X X X X
- stats per queue X X
+ traffic mirroring X X
+ CRC offload X X X X
+ VLAN offload X X X X
+ QinQ offload X X
+ L3 checksum offload X X X X
+ L4 checksum offload X X X X
+ inner L3 checksum X X X
+ inner L4 checksum X X X
+ packet type parsing X X X
+ timesync X X
+ basic stats X X X X X X X
+ extended stats X X X X X
+ stats per queue X X
EEPROM dump
registers dump
- multiprocess aware X X X X
- BSD nic_uio X X X X X
- Linux UIO X X X X X
- Linux VFIO X X X X X
- other kdrv X
+ multiprocess aware X X X X
+ BSD nic_uio X X X X X
+ Linux UIO X X X X X X
+ Linux VFIO X X X X X
+ other kdrv X
ARMv7
ARMv8
Power8
TILE-Gx
- x86-32 X X X X X
- x86-64 X X X X X X
- usage doc X X
+ x86-32 X X X X X X
+ x86-64 X X X X X X X
+ usage doc X X
design doc
perf doc
- ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
+ ==================== = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
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