Logan Gunthorpe bfcaa39652
ntb_tool: Add link status and files to debugfs ...
In order to more successfully script with ntb_tool it's useful to
have a link file to check the link status so that the script
doesn't use the other files until the link is up.
This commit adds a 'link' file to the debugfs directory which reads
boolean (Y or N) depending on the link status. Writing to the file
change the link state using ntb_link_enable or ntb_link_disable.
A 'link_event' file is also provided so an application can block until
the link changes to the desired state. If the user writes a 1, it will
block until the link is up. If the user writes a 0, it will block until
the link is down.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com >
Acked-by: Allen Hubbe <Allen.Hubbe@emc.com >
Signed-off-by: Jon Mason <jdmason@kudzu.us >
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bfcaa39652