docs: networking: convert multiqueue.txt to ReST

- add SPDX header;
- adjust titles and chapters, adding proper markups;
- mark code blocks and literals as such;
- use :field: markup;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/bonding.rst

@@ -1639,7 +1639,7 @@ can safely be sent over either interface.  Such configurations may be achieved
 using the traffic control utilities inherent in linux.
 
 By default the bonding driver is multiqueue aware and 16 queues are created
-when the driver initializes (see Documentation/networking/multiqueue.txt
+when the driver initializes (see Documentation/networking/multiqueue.rst
 for details).  If more or less queues are desired the module parameter
 tx_queues can be used to change this value.  There is no sysfs parameter
 available as the allocation is done at module init time.

Documentation/networking/index.rst

@@ -79,6 +79,7 @@ Contents:
    ltpc
    mac80211-injection
    mpls-sysctl
+   multiqueue
 
 .. only::  subproject and html
 

Documentation/networking/multiqueue.rst

@@ -1,17 +1,17 @@
+.. SPDX-License-Identifier: GPL-2.0
 
-		HOWTO for multiqueue network device support
-		===========================================
+===========================================
+HOWTO for multiqueue network device support
+===========================================
 
 Section 1: Base driver requirements for implementing multiqueue support
+=======================================================================
 
 Intro: Kernel support for multiqueue devices
 ---------------------------------------------------------
 
 Kernel support for multiqueue devices is always present.
 
-Section 1: Base driver requirements for implementing multiqueue support
------------------------------------------------------------------------
-
 Base drivers are required to use the new alloc_etherdev_mq() or
 alloc_netdev_mq() functions to allocate the subqueues for the device.  The
 underlying kernel API will take care of the allocation and deallocation of
@@ -26,8 +26,7 @@ comes online or when it's completely shut down (unregister_netdev(), etc.).
 
 
 Section 2: Qdisc support for multiqueue devices
-
------------------------------------------------
+===============================================
 
 Currently two qdiscs are optimized for multiqueue devices.  The first is the
 default pfifo_fast qdisc.  This qdisc supports one qdisc per hardware queue.
@@ -46,22 +45,22 @@ will be queued to the band associated with the hardware queue.
 
 
 Section 3: Brief howto using MULTIQ for multiqueue devices
----------------------------------------------------------------
+==========================================================
 
 The userspace command 'tc,' part of the iproute2 package, is used to configure
 qdiscs.  To add the MULTIQ qdisc to your network device, assuming the device
-is called eth0, run the following command:
+is called eth0, run the following command::
 
-# tc qdisc add dev eth0 root handle 1: multiq
+    # tc qdisc add dev eth0 root handle 1: multiq
 
 The qdisc will allocate the number of bands to equal the number of queues that
 the device reports, and bring the qdisc online.  Assuming eth0 has 4 Tx
-queues, the band mapping would look like:
+queues, the band mapping would look like::
 
-band 0 => queue 0
-band 1 => queue 1
-band 2 => queue 2
-band 3 => queue 3
+    band 0 => queue 0
+    band 1 => queue 1
+    band 2 => queue 2
+    band 3 => queue 3
 
 Traffic will begin flowing through each queue based on either the simple_tx_hash
 function or based on netdev->select_queue() if you have it defined.
@@ -69,11 +68,11 @@ function or based on netdev->select_queue() if you have it defined.
 The behavior of tc filters remains the same.  However a new tc action,
 skbedit, has been added.  Assuming you wanted to route all traffic to a
 specific host, for example 192.168.0.3, through a specific queue you could use
-this action and establish a filter such as:
+this action and establish a filter such as::
 
-tc filter add dev eth0 parent 1: protocol ip prio 1 u32 \
-	match ip dst 192.168.0.3 \
-	action skbedit queue_mapping 3
+    tc filter add dev eth0 parent 1: protocol ip prio 1 u32 \
+	    match ip dst 192.168.0.3 \
+	    action skbedit queue_mapping 3
 
-Author: Alexander Duyck <alexander.h.duyck@intel.com>
-Original Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com>
+:Author: Alexander Duyck <alexander.h.duyck@intel.com>
+:Original Author: Peter P. Waskiewicz Jr. <peter.p.waskiewicz.jr@intel.com>