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| author | Logan Gunthorpe <logang@deltatee.com> | 2019-05-24 00:31:00 +0200 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2019-06-13 15:03:12 +0200 |
| commit | d9c53aa440b332059f7f0ce3f7868ff1dc58c62c (patch) | |
| tree | 557c86aaa1c062e3ee53d27ccee3aeb5520983e9 /Documentation | |
| parent | NTB: Add MSI interrupt support to ntb_transport (diff) | |
| download | linux-d9c53aa440b332059f7f0ce3f7868ff1dc58c62c.tar.xz linux-d9c53aa440b332059f7f0ce3f7868ff1dc58c62c.zip | |
NTB: Describe the ntb_msi_test client in the documentation.
Add a blurb in Documentation/ntb.txt to describe the ntb_msi_test tool's
debugfs interface. Similar to the (out of date) ntb_tool description.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ntb.txt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/ntb.txt b/Documentation/ntb.txt index 074a423c853c..87d1372da879 100644 --- a/Documentation/ntb.txt +++ b/Documentation/ntb.txt @@ -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 ==================== |