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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-15 21:58:58 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-15 21:58:58 +0200
commit486088bc4689f826b80aa317b45ac9e42e8b25ee (patch)
treeadf5847a6119d24da990d9e336f005c4a316e6be /Documentation/xillybus.txt
parentMerge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff)
parentdocs: kprobes.txt: Fix whitespacing (diff)
downloadlinux-486088bc4689f826b80aa317b45ac9e42e8b25ee.tar.xz
linux-486088bc4689f826b80aa317b45ac9e42e8b25ee.zip
Merge tag 'standardize-docs' of git://git.lwn.net/linux
Pull documentation format standardization from Jonathan Corbet: "This series converts a number of top-level documents to the RST format without incorporating them into the Sphinx tree. The hope is to bring some uniformity to kernel documentation and, perhaps more importantly, have our existing docs serve as an example of the desired formatting for those that will be added later. Mauro has gone through and fixed up a lot of top-level documentation files to make them conform to the RST format, but without moving or renaming them in any way. This will help when we incorporate the ones we want to keep into the Sphinx doctree, but the real purpose is to bring a bit of uniformity to our documentation and let the top-level docs serve as examples for those writing new ones" * tag 'standardize-docs' of git://git.lwn.net/linux: (84 commits) docs: kprobes.txt: Fix whitespacing tee.txt: standardize document format cgroup-v2.txt: standardize document format dell_rbu.txt: standardize document format zorro.txt: standardize document format xz.txt: standardize document format xillybus.txt: standardize document format vfio.txt: standardize document format vfio-mediated-device.txt: standardize document format unaligned-memory-access.txt: standardize document format this_cpu_ops.txt: standardize document format svga.txt: standardize document format static-keys.txt: standardize document format smsc_ece1099.txt: standardize document format SM501.txt: standardize document format siphash.txt: standardize document format sgi-ioc4.txt: standardize document format SAK.txt: standardize document format rpmsg.txt: standardize document format robust-futexes.txt: standardize document format ...
Diffstat (limited to 'Documentation/xillybus.txt')
-rw-r--r--Documentation/xillybus.txt29
1 files changed, 14 insertions, 15 deletions
diff --git a/Documentation/xillybus.txt b/Documentation/xillybus.txt
index 1660145b9969..2446ee303c09 100644
--- a/Documentation/xillybus.txt
+++ b/Documentation/xillybus.txt
@@ -1,12 +1,11 @@
+==========================================
+Xillybus driver for generic FPGA interface
+==========================================
- ==========================================
- Xillybus driver for generic FPGA interface
- ==========================================
+:Author: Eli Billauer, Xillybus Ltd. (http://xillybus.com)
+:Email: eli.billauer@gmail.com or as advertised on Xillybus' site.
-Author: Eli Billauer, Xillybus Ltd. (http://xillybus.com)
-Email: eli.billauer@gmail.com or as advertised on Xillybus' site.
-
-Contents:
+.. Contents:
- Introduction
-- Background
@@ -17,7 +16,7 @@ Contents:
-- Synchronization
-- Seekable pipes
-- Internals
+ - Internals
-- Source code organization
-- Pipe attributes
-- Host never reads from the FPGA
@@ -29,7 +28,7 @@ Contents:
-- The "nonempty" message (supporting poll)
-INTRODUCTION
+Introduction
============
Background
@@ -105,7 +104,7 @@ driver is used to work out of the box with any Xillybus IP core.
The data structure just mentioned should not be confused with PCI's
configuration space or the Flattened Device Tree.
-USAGE
+Usage
=====
User interface
@@ -117,11 +116,11 @@ names of these files depend on the IP core that is loaded in the FPGA (see
Probing below). To communicate with the FPGA, open the device file that
corresponds to the hardware FIFO you want to send data or receive data from,
and use plain write() or read() calls, just like with a regular pipe. In
-particular, it makes perfect sense to go:
+particular, it makes perfect sense to go::
-$ cat mydata > /dev/xillybus_thisfifo
+ $ cat mydata > /dev/xillybus_thisfifo
-$ cat /dev/xillybus_thatfifo > hisdata
+ $ cat /dev/xillybus_thatfifo > hisdata
possibly pressing CTRL-C as some stage, even though the xillybus_* pipes have
the capability to send an EOF (but may not use it).
@@ -178,7 +177,7 @@ the attached memory is done by seeking to the desired address, and calling
read() or write() as required.
-INTERNALS
+Internals
=========
Source code organization
@@ -365,7 +364,7 @@ into that page. It can be shown that all pages requested from the kernel
(except possibly for the last) are 100% utilized this way.
The "nonempty" message (supporting poll)
----------------------------------------
+----------------------------------------
In order to support the "poll" method (and hence select() ), there is a small
catch regarding the FPGA to host direction: The FPGA may have filled a DMA