[dpdk-dev] [PATCH 7/8] doc: add DPAA2 QDMA rawdev guide

[Nipun Gupta]

Signed-off-by: Nipun Gupta <nipun.gupta at nxp.com>
---
 MAINTAINERS                       |   1 +
 doc/guides/rawdevs/dpaa2_qdma.rst | 140 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100644 doc/guides/rawdevs/dpaa2_qdma.rst

diff --git a/MAINTAINERS b/MAINTAINERS
index fccf5bb..6eb6d98 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -775,6 +775,7 @@ F: doc/guides/eventdevs/opdl.rst
 DPAA2 QDMA
 M: Nipun Gupta <nipun.gupta at nxp.com>
 F: drivers/raw/dpaa2_qdma/
+F: doc/guides/rawdevs/dpaa2_qdma.rst
 
 
 Packet processing
diff --git a/doc/guides/rawdevs/dpaa2_qdma.rst b/doc/guides/rawdevs/dpaa2_qdma.rst
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,140 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright 2018 NXP
+
+NXP DPAA2 QDMA Driver
+=====================
+
+The DPAA2 QDMA is an implementation of the rawdev API, that provide means
+to initiate a DMA transaction from CPU. The initiated DMA is performed
+without CPU being involved in the actual DMA transaction. This is achieved
+via using the DPDMAI device exposed by MC.
+
+More information can be found at `NXP Official Website
+<http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/qoriq-arm-processors:QORIQ-ARM>`_.
+
+Features
+--------
+
+The DPAA2 QDMA implements following features in the rawdev API;
+
+- Supports issuing DMA of data within memory without hogging CPU while
+  performing DMA operation.
+- Supports configuring to optionally get status of the DMA translation on
+  per DMA operation basis.
+
+Supported DPAA2 SoCs
+--------------------
+
+- LS2084A/LS2044A
+- LS2088A/LS2048A
+- LS1088A/LS1048A
+
+Prerequisites
+-------------
+
+There are three main pre-requisities for executing DPAA2 QDMA on a DPAA2
+compatible board:
+
+1. **ARM 64 Tool Chain**
+
+   For example, the `*aarch64* Linaro Toolchain <https://releases.linaro.org/components/toolchain/binaries/6.3-2017.02/aarch64-linux-gnu>`_.
+
+2. **Linux Kernel**
+
+   It can be obtained from `NXP's Github hosting <https://github.com/qoriq-open-source/linux>`_.
+
+3. **Rootfile system**
+
+   Any *aarch64* supporting filesystem can be used. For example,
+   Ubuntu 15.10 (Wily) or 16.04 LTS (Xenial) userland which can be obtained
+   from `here <http://cdimage.ubuntu.com/ubuntu-base/releases/16.04/release/ubuntu-base-16.04.1-base-arm64.tar.gz>`_.
+
+As an alternative method, DPAA2 QDMA can also be executed using images provided
+as part of SDK from NXP. The SDK includes all the above prerequisites necessary
+to bring up a DPAA2 board.
+
+The following dependencies are not part of DPDK and must be installed
+separately:
+
+- **NXP Linux SDK**
+
+  NXP Linux software development kit (SDK) includes support for family
+  of QorIQ® ARM-Architecture-based system on chip (SoC) processors
+  and corresponding boards.
+
+  It includes the Linux board support packages (BSPs) for NXP SoCs,
+  a fully operational tool chain, kernel and board specific modules.
+
+  SDK and related information can be obtained from:  `NXP QorIQ SDK  <http://www.nxp.com/products/software-and-tools/run-time-software/linux-sdk/linux-sdk-for-qoriq-processors:SDKLINUX>`_.
+
+- **DPDK Extra Scripts**
+
+  DPAA2 based resources can be configured easily with the help of ready scripts
+  as provided in the DPDK Extra repository.
+
+  `DPDK Extras Scripts <https://github.com/qoriq-open-source/dpdk-extras>`_.
+
+Currently supported by DPDK:
+
+- NXP SDK **2.0+**.
+- MC Firmware version **10.0.0** and higher.
+- Supported architectures:  **arm64 LE**.
+
+- Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup the basic DPDK environment.
+
+.. note::
+
+   Some part of fslmc bus code (mc flib - object library) routines are
+   dual licensed (BSD & GPLv2).
+
+Pre-Installation Configuration
+------------------------------
+
+Config File Options
+~~~~~~~~~~~~~~~~~~~
+
+The following options can be modified in the ``config`` file.
+
+- ``CONFIG_RTE_LIBRTE_PMD_DPAA2_QDMA`` (default ``y``)
+
+  Toggle compilation of the ``lrte_pmd_dpaa2_qdma`` driver.
+
+Enabling logs
+-------------
+
+For enabling logs, use the following EAL parameter:
+
+.. code-block:: console
+
+   ./your_qdma_application <EAL args> --log-level=pmd.dpaa2.qdma,<level>
+
+Using ``dpaa2.qdma`` as log matching criteria, all Event PMD logs can be
+enabled which are lower than logging ``level``.
+
+Driver Compilation
+~~~~~~~~~~~~~~~~~~
+
+To compile the DPAA2 QDMA PMD for Linux arm64 gcc target, run the
+following ``make`` command:
+
+.. code-block:: console
+
+   cd <DPDK-source-directory>
+   make config T=arm64-dpaa2-linuxapp-gcc install
+
+Initialization
+--------------
+
+The DPAA2 QDMA is exposed as a vdev device which consists of dpdmai devices.
+On EAL initialization, dpdmai devices will be probed and populated into the
+rawdevices. The rawdev ID of the device can be obtained using
+
+* Invoking ``rte_rawdev_get_dev_id("dpdmai.x")`` from the application
+  where x is the object ID of the DPDMAI object created by MC. Use can
+  use this index for further rawdev function calls.
+
+Platform Requirement
+~~~~~~~~~~~~~~~~~~~~
+
+DPAA2 drivers for DPDK can only work on NXP SoCs as listed in the
+``Supported DPAA2 SoCs``.
-- 
1.9.1