linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2018-01-15	dma-direct: reject too small dma masks	Christoph Hellwig	1	-0/+19
	Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2018-01-15	dma-direct: make dma_direct_{alloc,free} available to other implementations	Christoph Hellwig	1	-3/+3
	So that they don't need to indirect through the operation vector. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
2018-01-15	dma-direct: retry allocations using GFP_DMA for small masks	Christoph Hellwig	1	-1/+24
	If an attempt to allocate memory succeeded, but isn't inside the supported DMA mask, retry the allocation with GFP_DMA set as a last resort. Based on the x86 code, but an off by one error in what is now dma_coherent_ok has been fixed vs the x86 code. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-01-15	dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32	Christoph Hellwig	1	-0/+14
	This allows to dip into zones for lower memory if they are available. If one of the zones is not available the corresponding GFP_* flag will evaluate to 0 so they won't change anything. We provide an arch tunable for those architectures that do not use GFP_DMA for the lowest 24-bits, given that there are a few. Roughly based on the x86 code. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-01-15	dma-direct: use node local allocations for coherent memory	Christoph Hellwig	1	-1/+1
	To preserve the x86 behavior. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2018-01-15	dma-direct: add support for CMA allocation	Christoph Hellwig	1	-6/+18
	Try the CMA allocator for coherent allocations if supported. Roughly modelled after the x86 code. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-01-15	dma-direct: add dma address sanity checks	Christoph Hellwig	1	-1/+30
	Roughly based on the x86 pci-nommu implementation. Signed-off-by: Christoph Hellwig <hch@lst.de>
2018-01-15	dma-direct: use phys_to_dma	Christoph Hellwig	1	-11/+7
	This means it uses whatever linear remapping scheme that the architecture provides is used in the generic dma_direct ops. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
2018-01-15	dma-direct: rename dma_noop to dma_direct	Christoph Hellwig	1	-0/+63
	The trivial direct mapping implementation already does a virtual to physical translation which isn't strictly a noop, and will soon learn to do non-direct but linear physical to dma translations through the device offset and a few small tricks. Rename it to a better fitting name. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>