Messages in this thread | | | Date | Tue, 22 Apr 2014 10:30:36 -0500 | Subject | Re: [PATCH v2 0/7] of: setup dma parameters using dma-ranges and dma-coherent | From | Rob Herring <> |
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On Tue, Apr 22, 2014 at 10:25 AM, Catalin Marinas <catalin.marinas@arm.com> wrote: > On Tue, Apr 22, 2014 at 04:02:19PM +0100, Arnd Bergmann wrote: >> On Saturday 19 April 2014, Thomas Petazzoni wrote:
[...]
>> I would hope we can find a way to avoid the platform notifiers for >> mvebu as well and come up with a generic way to express this >> 'semi-coherent' mode. I believe x-gene has a similar issue, and >> I wouldn't be surprised if there are others like this. > > The solution is for the snooping unit to detect the DSB instruction > (which is propagated outside the CPU) and wait for the completion of the > coherency work (but we need more information from the hardware guys).
If the solution was fixing broken h/w, we'd all be retired (or h/w designers). :)
Rob
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