On Wed, 22 Mar 2017, Manuel Bouyer wrote:
On Wed, Mar 22, 2017 at 08:54:21AM +0100, Martin Husemann wrote:
On Wed, Mar 22, 2017 at 04:35:21PM +0900, Masanobu SAITOH wrote:
So what should we do?
A) modify pci_mapreg_map(). Stop setting BUS_SPACE_MAP_PREFETCHABLE
by defalut when prefetchable bit is set. If a driver really know
the whole area of the BAR is prefetchable, set BUS_SPACE_MAP_PREFETCHABLE
in the 4th argument(busflags) of pci_mapreg_map(). pci_mapreg_map()
check for both the 4th argument and the prefetchable bit, it sets
BUS_SPACE_MAP_PREFETCHABLE only when both bits are set.
[..]
I prefer A.
This gets my vote too.
Same here.
I'm no expert in this area, but this option makes the most sense to me,
too.
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