X-Git-Url: http://git.samba.org/samba.git/?a=blobdiff_plain;f=Documentation%2Fdriver-api%2Fntb.rst;h=87d1372da879dc5433da570be3f1df8ffd0d4ff9;hb=bec5545edef658f81cd9721dbe8fbebeb3c7534d;hp=074a423c853cf7f66cc96b80484a2a4c7038d698;hpb=f1a3b43cc1f50c6ee5ba582f2025db3dea891208;p=sfrench%2Fcifs-2.6.git

diff --git a/Documentation/driver-api/ntb.rst b/Documentation/driver-api/ntb.rst
index 074a423c853c..87d1372da879 100644
--- a/Documentation/driver-api/ntb.rst
+++ b/Documentation/driver-api/ntb.rst
@@ -200,6 +200,33 @@ Debugfs Files:
 	This file is used to read and write peer scratchpads.  See
 	*spad* for details.
 
+NTB MSI Test Client (ntb\_msi\_test)
+------------------------------------
+
+The MSI test client serves to test and debug the MSI library which
+allows for passing MSI interrupts across NTB memory windows. The
+test client is interacted with through the debugfs filesystem:
+
+* *debugfs*/ntb\_tool/*hw*/
+	A directory in debugfs will be created for each
+	NTB device probed by the tool.  This directory is shortened to *hw*
+	below.
+* *hw*/port
+	This file describes the local port number
+* *hw*/irq*_occurrences
+	One occurrences file exists for each interrupt and, when read,
+	returns the number of times the interrupt has been triggered.
+* *hw*/peer*/port
+	This file describes the port number for each peer
+* *hw*/peer*/count
+	This file describes the number of interrupts that can be
+	triggered on each peer
+* *hw*/peer*/trigger
+	Writing an interrupt number (any number less than the value
+	specified in count) will trigger the interrupt on the
+	specified peer. That peer's interrupt's occurrence file
+	should be incremented.
+
 NTB Hardware Drivers
 ====================