Documentation: move dma-buf documentation to rst

Branch out dma-buf related documentation into its own rst file to allow
adding it to the sphinx documentation generated.

Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

2 files changed, 74 insertions, 37 deletions

diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl
index 99cdc05bbb7a..a93fbffa9742 100644
--- a/Documentation/DocBook/device-drivers.tmpl
+++ b/Documentation/DocBook/device-drivers.tmpl
@@ -128,43 +128,6 @@ X!Edrivers/base/interface.c
 !Edrivers/base/platform.c
 !Edrivers/base/bus.c
      </sect1>
-     <sect1>
-       <title>Buffer Sharing and Synchronization</title>
-       <para>
-         The dma-buf subsystem provides the framework for sharing buffers
-         for hardware (DMA) access across multiple device drivers and
-         subsystems, and for synchronizing asynchronous hardware access.
-       </para>
-       <para>
-         This is used, for example, by drm "prime" multi-GPU support, but
-         is of course not limited to GPU use cases.
-       </para>
-       <para>
-         The three main components of this are: (1) dma-buf, representing
-         a sg_table and exposed to userspace as a file descriptor to allow
-         passing between devices, (2) fence, which provides a mechanism
-         to signal when one device as finished access, and (3) reservation,
-         which manages the shared or exclusive fence(s) associated with
-         the buffer.
-       </para>
-       <sect2><title>dma-buf</title>
-!Edrivers/dma-buf/dma-buf.c
-!Iinclude/linux/dma-buf.h
-       </sect2>
-       <sect2><title>reservation</title>
-!Pdrivers/dma-buf/reservation.c Reservation Object Overview
-!Edrivers/dma-buf/reservation.c
-!Iinclude/linux/reservation.h
-       </sect2>
-       <sect2><title>fence</title>
-!Edrivers/dma-buf/fence.c
-!Iinclude/linux/fence.h
-!Edrivers/dma-buf/seqno-fence.c
-!Iinclude/linux/seqno-fence.h
-!Edrivers/dma-buf/sync_file.c
-!Iinclude/linux/sync_file.h
-       </sect2>
-     </sect1>
      <sect1><title>Device Drivers DMA Management</title>
 !Edrivers/base/dma-coherent.c
 !Edrivers/base/dma-mapping.c
diff --git a/Documentation/dma-buf.rst b/Documentation/dma-buf.rst
new file mode 100644
index 000000000000..939d1ad1075e
--- /dev/null
+++ b/Documentation/dma-buf.rst
@@ -0,0 +1,74 @@
+==================================
+Buffer Sharing and Synchronization
+==================================
+
+
+Introduction
+------------
+
+The dma-buf subsystem provides the framework for sharing buffers for
+hardware (DMA) access across multiple device drivers and subsystems, and
+for synchronizing asynchronous hardware access.
+
+This is used, for example, by drm "prime" multi-GPU support, but is of
+course not limited to GPU use cases.
+
+The three main components of this are:
+
+* dma-buf_: represents an sg_table, and is exposed to userspace as a file
+  descriptor to allow passing between devices,
+
+* fence_: which provides a mechanism to signal when one device has finished
+  access, and
+ 
+* reservation_: manages the shared or exclusive fence(s) associated with the
+  buffer.
+
+.. _dma-buf:
+
+dma-buf
+~~~~~~~
+
+.. kernel-doc:: drivers/dma-buf/dma-buf.c
+   :export:
+
+.. kernel-doc:: include/linux/dma-buf.h
+   :internal:
+
+.. _fence:
+
+fence
+~~~~~
+
+.. kernel-doc:: drivers/dma-buf/fence.c
+   :export:
+
+.. kernel-doc:: include/linux/fence.h
+   :internal:
+
+.. kernel-doc:: drivers/dma-buf/seqno-fence.c
+   :export:
+
+.. kernel-doc:: include/linux/seqno-fence.h
+   :internal:
+
+.. kernel-doc:: drivers/dma-buf/sync_file.c
+   :export:
+
+.. kernel-doc:: include/linux/sync_file.h
+   :internal:
+
+.. _reservation:
+
+reservation
+~~~~~~~~~~~
+
+.. kernel-doc:: drivers/dma-buf/reservation.c
+   :doc: Reservation Object Overview
+
+.. kernel-doc:: drivers/dma-buf/reservation.c
+   :export:
+
+.. kernel-doc:: include/linux/reservation.h
+   :internal:
+