On 08/06/13 03:24, aseem.jolly wrote:
I don't want to play around with 'kern.maxbcache', can we actually allow
driver to support 64 bit DMA?
In future we can use a bootarg/sysctl to enable this support if someone
comes across this issue else we will use 32 bit DMA allocations.

I am willing to enable this support, please guide me.


You can start with the EHCI driver, if you like. Download the EHCI PDF from INTEL's site. Figure out all the 32-bit HIGH fields and put valid data in them. For all 32-bit address there is a corresponding 32-bit high field.

Thank you!


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