[PATCH 0/3] ntb: Fixes and enhancements to ntb tools

[Logan Gunthorpe <logang@deltatee.com>]

Hi,

I've been working on developing an experimental NTB driver for some
custom hardware and I've found the need to make some minor enhancements
to the NTB layer.

1) I've modified ntb_perf to take an option similar to ntb_transport
which limits the memory window size. This was useful seeing the mws
I'm dealing with are much larger than the available coherent memory I
can allocate.

2) I've added code to ntb_perf and ntb_transport to check that there
are enough scratchpad registers. (As I was hit by a problem where my
hardware did not have enough for ntb_transport, and I would have liked
better information on the cause of the issue.)

3) Added support to debug and test memory windows to ntb_tool. A
coherent buffer is added when the link comes up, and then a debugfs
file for each mw and peer mw is added which allows reading and writing
the buffer. This was useful for me to debug window alignment issues I
was having.

I'm happy to make any revisions to these patches if anyone finds any
issues.

Thanks,

Logan


Logan Gunthorpe (3):
  ntb_perf: Allow limiting the size of the memory windows
  ntb_transport: Check the number of spads the hardware supports
  ntb_tool: Add memory window debug support

 drivers/ntb/ntb_transport.c |   9 +-
 drivers/ntb/test/ntb_perf.c |  16 ++-
 drivers/ntb/test/ntb_tool.c | 258 +++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 278 insertions(+), 5 deletions(-)

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2.1.4