[dpdk-dev] [PATCH v2 5/7] cryptodev: add document for virtio crypto PMD

[Jay Zhou <jianjay.zhou@huawei.com>]

Signed-off-by: Jay Zhou <jianjay.zhou@huawei.com>
---
 doc/guides/cryptodevs/features/virtio.ini | 20 +++++++
 doc/guides/cryptodevs/virtio.rst          | 93 +++++++++++++++++++++++++++++++
 2 files changed, 113 insertions(+)
 create mode 100644 doc/guides/cryptodevs/features/virtio.ini
 create mode 100644 doc/guides/cryptodevs/virtio.rst

diff --git a/doc/guides/cryptodevs/features/virtio.ini b/doc/guides/cryptodevs/features/virtio.ini
new file mode 100644
index 0000000..43396ff
--- /dev/null
+++ b/doc/guides/cryptodevs/features/virtio.ini
@@ -0,0 +1,20 @@
+; Supported features of the 'virtio' crypto driver.
+;
+; Refer to default.ini for the full list of available PMD features.
+;
+[Features]
+Symmetric crypto       = Y
+Sym operation chaining = N
+HW Accelerated         = N
+Mbuf scatter gather    = N
+
+;
+; Supported crypto algorithms of the 'virtio' crypto driver.
+;
+[Cipher]
+AES CBC (128)  = Y
+AES CBC (192)  = Y
+AES CBC (256)  = Y
+AES CTR (128)  = Y
+AES CTR (192)  = Y
+AES CTR (256)  = Y
diff --git a/doc/guides/cryptodevs/virtio.rst b/doc/guides/cryptodevs/virtio.rst
new file mode 100644
index 0000000..8c06eb5
--- /dev/null
+++ b/doc/guides/cryptodevs/virtio.rst
@@ -0,0 +1,93 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2015-2016 Intel Corporation.
+
+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``
+* ``RTE_CRYPTO_CIPHER_AES_CTR``
+
+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 cipher only algorithms since the virtio backend of qemu side
+   only supports cipher only now.
+*  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 build QEMU with libgcrypt cryptography support.
+QEMU can then be started using the following parameters:
+
+.. code-block:: console
+
+    qemu-system-x86_64 \
+    [...] \
+        -object cryptodev-backend-builtin,id=cryptodev0 \
+        -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 test cases can be tested as below:
+
+.. code-block:: console
+
+    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
+    reserve enough huge pages
+    run the tests with "./test"
+    type the command "cryptodev_virtio_autotest" to test
-- 
1.8.3.1