[ofw] HCA Description field format differences between Windows & Linux?

[Fab Tillier]

Hefty, Sean wrote on Thu, 3 Jun 2010 at 11:11:21

>>>> How do the Linux drivers set this?  Isn't there a local MAD you issue
>>>> to the HCA to set the node description?
>>> 
>>> I think linux reads this from a file.
>> 
>> What I meant is, how does Linux program this into the HCA so that a
>> request for node description returns the proper data?
> 
> My guess is part of the bring up scripts to load the drivers write a
> node description value to a file, which is seen by the HCA driver.
> 
> For example, on a system running kernel.org 2.6.34-rc7 the node_desc
> that I see is:
> 
> MT25208 InfiniHostEx Mellanox Technologies
> 
> If I write to the node_desc file, the description changes as expected.
> However, if I unload then reload the driver, the node_desc is reset.

Ok, what does the code that detects the file change do to program the updated node description?

-Fab