[dpdk-dev] [PATCH v3 5/5] doc: add documentation for multi process crypto app

[Arek Kusztal <arkadiuszx.kusztal@intel.com>]

This commit adds documentation for multi process crypto test
application.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
---
 doc/guides/tools/index.rst     |   1 +
 doc/guides/tools/mp_crypto.rst | 151 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 doc/guides/tools/mp_crypto.rst

diff --git a/doc/guides/tools/index.rst b/doc/guides/tools/index.rst
index 4840cf4..a360307 100644
--- a/doc/guides/tools/index.rst
+++ b/doc/guides/tools/index.rst
@@ -17,3 +17,4 @@ DPDK Tools User Guides
     cryptoperf
     comp_perf
     testeventdev
+    mp-crypto
diff --git a/doc/guides/tools/mp_crypto.rst b/doc/guides/tools/mp_crypto.rst
new file mode 100644
index 0000000..201834f
--- /dev/null
+++ b/doc/guides/tools/mp_crypto.rst
@@ -0,0 +1,151 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2020 Intel Corporation.
+
+dpdk-test-mp-crypto Application
+===============================
+
+The Multi-process Crypto application is a simple application that
+allows to run crypto related operations in a multiple process environment. It
+builds on the EAL primary/secondary process infrastructure.
+
+The application allows a user to configure devices, setup queue-pairs, create
+and init sessions and specify data-path flow (enqueue/dequeue) in different
+processes. The app can help to check if the PMD behaves correctly
+in scenarios like the following:
+
+* device is configured in primary process, queue-pairs are setup in secondary process
+
+* queue pair is shared across processes, i.e. enqueue in one process and dequeue in another
+
+
+Compiling the Application
+-------------------------
+
+To compile the sample application see :doc:`compiling`.
+
+The application is located in the ``app/test-mp_crypto`` directory.
+
+Running the Application
+-----------------------
+
+App binary: dpdk-test-mp-crypto (in build/app)
+
+For running PRIMARY or SECONDARY process standard EAL options apply:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto --proc-type primary
+
+    ./dpdk-test-mp-crypto --proc-type secondary
+
+.. Note::
+
+	The same set of BDFs must be passed to all processes.
+
+.. Note::
+	The same crypto devices must be created in all processes, e.g. in qat
+	case if asym and sym devices are enabled in the primary process, they
+	must be enabled in all secondary processes.
+
+General help can by checked by running:
+
+. code-block:: console
+
+   ./dpdk-test-mp-crypto -- -h
+
+The application has a number of command line options:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -- --devtype [dev-name]
+
+This option specifies which driver to use by its name (for example "crypto_qat").
+The same name must be passed to all processes.
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -- --config_dev [devA, devB,]
+
+This option specifies the list of devices that should be configured by this process,
+this results in a call to the ``rte_cryptodev_configure`` API. devX is a positive
+integer (including zero), the value is according to probe order (from the smallest
+BDF number), not necessarily the cmdline order.
+
+Example command:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -w 03:01.2 -w 03:01.1 -w 03:01.3 --config-dev 0,2
+
++will configure devices 03:01.1 and 03:01.3.
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -- --qp-config=[devA]:[qp_A, qp_B,];[devB]:[qp_A, qp_C];
+
+devX - positive integer (including zero), as in config_dev command
+
++qp_X - positive integer (including zero), specifies which queue pair should be setup
+
+This command specifies which queue pairs should be setup, resulting in a call to
+``rte_cryptodev_queue_pair_setup`` API.
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -w 03:01.2 -w 03:01.1 -w 03:01.3 --qp-config="0:0,1;1:1;2:0,1;"
+
+This command will configure queue pairs 0 and 1 on device 0 (03:01.1), queue pair 1
+on device 1 (03:01.2), queue pairs 0 and 1 on device 2 (03:01.3). The device in question
+should be configured before that, though not necessarily by the same process.
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -- --enq=[devX]:[qpX]:[ops]:[vector_id]
+    ./dpdk-test-mp-crypto -- --deq=[devX]:[qpX]:[ops]:[vector_id]
+
+devX - positive integer (including zero), as in config_dev command
+
+qp_X - positive integer (including zero), as in qp-config command
+
+ops - when positive integer - number of operations to enqueue/dequeue, when 0 infinite loop
+
+vector_id - positive integer (including zero), vector_id used by this process
+
+This commands will enqueue/dequeue "ops" number of packets to qp_X on devX.
+Example usage:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto -- --enq=2:0:0:0, --deq=2:0:0:0,
+
+Note. ',' comma character is necessary at the end due to some parser shortcomings.
+
+To close the application when running in an infinite loop a signal handler is
+registered to catch interrupt signals i.e. ``ctrl-c`` should be used. When
+used in primary process other processes will be notified about exiting
+intention and will close after collecting remaining packets (if dequeuing).
+
+Example commands
+----------------
+
+Use two different devices on 3 separate queues:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto --proc-type primary -c 1 -w 03:01.1 -w 03:01.2 -- --devtype "crypto_qat" --config-dev 0,1   --qp-config="0:0,1;1:0,1;" --session-mask=0x3  --enq=0:0:0:0, --deq=0:0:0:0,  --print-stats
+    ./dpdk-test-mp-crypto --proc-type secondary -c 2 -w 03:01.1 -w 03:01.2 -- --devtype "crypto_qat"  --enq=0:1:0:0, --deq=0:1:0:0,  --print-stats
+    ./dpdk-test-mp-crypto --proc-type secondary -c 4 -w 03:01.1 -w 03:01.2 -- --devtype "crypto_qat"  --enq=1:0:0:0, --deq=1:0:0:0,  --print-stats
+
+Use different processes to enqueue and dequeue to one queue pair:
+
+.. code-block:: console
+
+    ./dpdk-test-mp-crypto --proc-type primary -c 1 -w 03:01.1 -- --devtype "crypto_qat" --config-dev 0    --session-mask=0x3 --qp-config="0:1;"   --enq=0:1:0:0,   --print-stats
+    ./dpdk-test-mp-crypto --proc-type secondary -c 2 -w 03:01.1 -- --devtype "crypto_qat"  --deq=0:1:0:0,   --print-stats
+
+Limitations
+-----------
+
+Only one crypto vector and session type is possible to chose right now and it is AES-GCM test case.
+
+Number of descriptors if set by default to 4096
-- 
2.1.0