22 Jul, 2008
1 commit
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Introduce a new dma attriblue DMA_ATTR_WEAK_ORDERING to use weak ordering
on DMA mappings in the Cell processor. Add the code to the Cell's IOMMU
implementation to use this code.Dynamic mappings can be weakly or strongly ordered on an individual basis
but the fixed mapping has to be either completely strong or completely weak.
This is currently decided by a kernel boot option (pass iommu_fixed=weak
for a weakly ordered fixed linear mapping, strongly ordered is the default).Signed-off-by: Mark Nelson
Signed-off-by: Arnd Bergmann
Signed-off-by: Benjamin Herrenschmidt
29 Apr, 2008
1 commit
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Document the new dma_*map*_attrs() functions.
[markn@au1.ibm.com: fix up for dma-add-dma_map_attrs-interfaces and update docs]
Signed-off-by: Arthur Kepner
Acked-by: David S. Miller
Cc: Tony Luck
Cc: Jesse Barnes
Cc: Jes Sorensen
Cc: Randy Dunlap
Cc: Roland Dreier
Cc: James Bottomley
Cc: Benjamin Herrenschmidt
Cc: Grant Grundler
Cc: Michael Ellerman
Signed-off-by: Mark Nelson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds