[openib-general] Re: [PATCH] mthca - command interface

Michael S. Tsirkin mst at mellanox.co.il
Mon Feb 13 11:39:24 PST 2006


Quoting Roland Dreier <rdreier at cisco.com>:
> I don't know what the precise ordering requirements
> for commands through the UAR are, but you need explicit wmb()s for
> __raw_writel() to guarantee order.

All writes must be done in-order, same as doorbell.

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies



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