cxgbe: fix and update doc

Fix spelling and grammar errors.  Re-organize sections for better explanation
in the documentation.  Add a section describing compilation of CXGBE with DPDK.
Add a note describing that CXGBE currently only supports binding to PF4.

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>

diff --git a/doc/guides/nics/cxgbe.rst b/doc/guides/nics/cxgbe.rst
index 6ac5e07..7557db0 100644 (file)
--- a/doc/guides/nics/cxgbe.rst
+++ b/doc/guides/nics/cxgbe.rst
@@ -34,21 +34,21 @@ CXGBE Poll Mode Driver
 The CXGBE PMD (**librte_pmd_cxgbe**) provides poll mode driver support
 for **Chelsio T5** 10/40 Gbps family of adapters.
 
-More information can be found at `Chelsio Communications
+More information can be found at `Chelsio Communications Official Website
 <http://www.chelsio.com>`_.
 
 Features
 --------
 
-CXGBE PMD has the support for:
+CXGBE PMD has support for:
 
-- Multiple queues for TX and RX.
-- Receiver Side Steering (RSS).
-- VLAN filtering.
-- Checksum offload.
-- Promiscuous mode.
-- All multicast mode.
-- Port hardware statistics.
+- Multiple queues for TX and RX
+- Receiver Side Steering (RSS)
+- VLAN filtering
+- Checksum offload
+- Promiscuous mode
+- All multicast mode
+- Port hardware statistics
 
 Limitations
 -----------
@@ -57,16 +57,35 @@ The Chelsio T5 devices provide two/four ports but expose a single PCI bus
 address, thus, librte_pmd_cxgbe registers itself as a
 PCI driver that allocates one Ethernet device per detected port.
 
-For this reason, one cannot white/blacklist a single port without also
-white/blacklisting the others on the same device.
+For this reason, one cannot whitelist/blacklist a single port without
+whitelisting/blacklisting the other ports on the same device.
 
-Configuration
+Supported Chelsio T5 NICs
+-------------------------
+
+- 1G NICs: T502-BT
+- 10G NICs: T520-BT, T520-CR, T520-LL-CR, T520-SO-CR, T540-CR
+- 40G NICs: T580-CR, T580-LP-CR, T580-SO-CR
+- Other T5 NICs: T522-CR
+
+Prerequisites
 -------------
 
-Compiling CXGBE PMD
+- Requires firmware version **1.13.32.0** and higher. Visit
+  `Chelsio Download Center <http://service.chelsio.com>`_ to get latest firmware
+  bundled with the latest Chelsio Unified Wire package. Installing and loading
+  the latest cxgb4 kernel driver from the Chelsio Unified Wire package should
+  get you the latest firmware. More information can be obtained from the User
+  Guide that is bundled with the Chelsio Unified Wire package.
+
+Pre-Installation Configuration
+------------------------------
+
+Config File Options
 ~~~~~~~~~~~~~~~~~~~
 
-These options can be modified in the ``.config`` file.
+The following options can be modified in the ``.config`` file. Please note that
+enabling debugging options may affect system performance.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_PMD`` (default **y**)
 
@@ -74,39 +93,37 @@ These options can be modified in the ``.config`` file.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_DEBUG`` (default **n**)
 
-  Toggle debugging code. Enabling this option adds additional generic debugging
-  messages at the cost of lower performance.
+  Toggle display of generic debugging messages.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_DEBUG_REG`` (default **n**)
 
-  Toggle debugging code. Enabling this option adds additional registers related
-  run-time checks and debugging messages at the cost of lower performance.
+  Toggle display of registers related run-time check messages.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_DEBUG_MBOX`` (default **n**)
 
-  Toggle debugging code. Enabling this option adds additional firmware mailbox
-  related run-time checks and debugging messages at the cost of lower
-  performance.
+  Toggle display of firmware mailbox related run-time check messages.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_DEBUG_TX`` (default **n**)
 
-  Toggle debugging code. Enabling this option adds additional transmission data
-  path run-time checks and debugging messages at the cost of lower performance.
+  Toggle display of transmission data path run-time check messages.
 
 - ``CONFIG_RTE_LIBRTE_CXGBE_DEBUG_RX`` (default **n**)
 
-  Toggle debugging code. Enabling this option adds additional receiving data
-  path run-time checks and debugging messages at the cost of lower performance.
+  Toggle display of receiving data path run-time check messages.
 
-Prerequisites
--------------
+Driver Compilation
+~~~~~~~~~~~~~~~~~~
 
-- Requires firmware version **1.13.32.0** and higher. Visit
-  `Chelsio Download Center <http://service.chelsio.com>`_ to get latest firmware
-  bundled with the latest Chelsio Unified Wire package. Installing and loading
-  the latest cxgb4 kernel driver from the Chelsio Unified Wire package should
-  get you the latest firmware. More information can be obtained from the User
-  Guide that is bundled with the Chelsio Unified Wire package.
+To compile CXGBE PMD for Linux x86_64 gcc target, run the following "make"
+command:
+
+.. code-block:: console
+
+   cd <DPDK-source-directory>
+   make config T=x86_64-native-linuxapp-gcc install
+
+Installation
+------------
 
 Steps to manually install the latest firmware from the downloaded source files
 are as follows:
@@ -161,14 +178,6 @@ are as follows:
 
       firmware-version: 1.13.32.0, TP 0.1.4.8
 
-Supported Chelsio T5 NICs
--------------------------
-
-- 1G NICs: T502-BT
-- 10G NICs: T520-BT, T520-CR, T520-LL-CR, T520-SO-CR, T540-CR
-- 40G NICs: T580-CR, T580-LP-CR, T580-SO-CR
-- Other T5 NICs: T522-CR
-
 Sample Application Notes
 -------------------------
 
@@ -242,6 +251,10 @@ devices managed by librte_pmd_cxgbe.
 
       ./tools/dpdk_nic_bind.py --bind vfio-pci 0000:02:00.4
 
+   .. note::
+
+      CXGBE PMD currently only supports the binding of PF4 for Chelsio T5 NICs.
+
 #. Start testpmd with basic parameters:
 
    .. code-block:: console