intel-iommu: Workaround IOTLB hang on Ironlake GPU

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To work around a hardware issue, we have to submit IOTLB flushes while
the graphics engine is idle. The graphics driver will (we hope) go to
great lengths to ensure that it gets that right on the affected
chipset(s)... so let's not screw it over by deferring the unmap and
doing it later. That wouldn't be very helpful.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>

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David Woodhouse 2011-10-17 15:51:52 -07:00 • committed by Keith Packard

parent 130c2561de

commit d15bf23bc0

1 changed files with 5 additions and 1 deletions

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drivers/iommu/intel-iommu.c

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