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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-linuxapp-gcc
+ make install T=x86_64-native-linuxapp-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-linuxapp-gcc
+ export RTE_SDK=`pwd`
+ cd to test/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-linuxapp-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