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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2018 HUAWEI TECHNOLOGIES CO., LTD.
Virtio Crypto Poll Mode Driver
==============================
The virtio crypto PMD provides poll mode driver support for the virtio crypto
device.
Features
--------
The virtio crypto PMD has support for:
Cipher algorithms:
* ``RTE_CRYPTO_CIPHER_AES_CBC``
Hash algorithms:
* ``RTE_CRYPTO_AUTH_SHA1_HMAC``
Limitations
-----------
* Only supports the session-oriented API implementation (session-less APIs are
not supported).
* Only supports modern mode since virtio crypto conforms to virtio-1.0.
* Only has two types of queues: data queue and control queue. These two queues
only support indirect buffers to communication with the virtio backend.
* Only supports AES_CBC cipher only algorithm and AES_CBC with HMAC_SHA1
chaining algorithm since the vhost crypto backend only these algorithms
are supported.
* Does not support Link State interrupt.
* Does not support runtime configuration.
Virtio crypto PMD Rx/Tx Callbacks
---------------------------------
Rx callbacks:
* ``virtio_crypto_pkt_rx_burst``
Tx callbacks:
* ``virtio_crypto_pkt_tx_burst``
Installation
------------
Quick instructions are as follows:
Firstly run DPDK vhost crypto sample as a server side and build QEMU with
vhost crypto enabled.
QEMU can then be started using the following parameters:
.. code-block:: console
qemu-system-x86_64 \
[...] \
-chardev socket,id=charcrypto0,path=/path/to/your/socket \
-object cryptodev-vhost-user,id=cryptodev0,chardev=charcrypto0 \
-device virtio-crypto-pci,id=crypto0,cryptodev=cryptodev0
[...]
Secondly bind the uio_generic driver for the virtio-crypto device.
For example, 0000:00:04.0 is the domain, bus, device and function
number of the virtio-crypto device:
.. code-block:: console
modprobe uio_pci_generic
echo -n 0000:00:04.0 > /sys/bus/pci/drivers/virtio-pci/unbind
echo "1af4 1054" > /sys/bus/pci/drivers/uio_pci_generic/new_id
Finally the front-end virtio crypto PMD driver can be installed:
.. code-block:: console
cd to the top-level DPDK directory
sed -i 's,\(CONFIG_RTE_LIBRTE_PMD_VIRTIO_CRYPTO\)=n,\1=y,' config/common_base
make config T=x86_64-native-linux-gcc
make install T=x86_64-native-linux-gcc
Tests
-----
The unit test cases can be tested as below:
.. code-block:: console
reserve enough huge pages
cd to the top-level DPDK directory
export RTE_TARGET=x86_64-native-linux-gcc
export RTE_SDK=`pwd`
cd to app/test
type the command "make" to compile
run the tests with "./test"
type the command "cryptodev_virtio_autotest" to test
The performance can be tested as below:
.. code-block:: console
reserve enough huge pages
cd to the top-level DPDK directory
export RTE_TARGET=x86_64-native-linux-gcc
export RTE_SDK=`pwd`
cd to app/test-crypto-perf
type the command "make" to compile
run the tests with the following command:
./dpdk-test-crypto-perf -l 0,1 -- --devtype crypto_virtio \
--ptest throughput --optype cipher-then-auth --cipher-algo aes-cbc \
--cipher-op encrypt --cipher-key-sz 16 --auth-algo sha1-hmac \
--auth-op generate --auth-key-sz 64 --digest-sz 12 \
--total-ops 100000000 --burst-sz 64 --buffer-sz 2048
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