On Tue, 24 Apr 2018 11:16:25 PDT (-0700), Christoph Hellwig wrote:
This was used by the ide, scsi and networking code in the past to
determine if they should bounce payloads. Now that the dma mapping
always have to support dma to all physical memory (thanks to swiotlb
for non-iommu systems)
This was used by the ide, scsi and networking code in the past to
determine if they should bounce payloads. Now that the dma mapping
always have to support dma to all physical memory (thanks to swiotlb
for non-iommu systems) there is no need to this crude hack any more.
Signed-off-by: Christoph
ops implementations can always (minus the ISA DMA case which
will require further attention) handle memory passed to them.
Changes since V1:
- dropped all patches not strictly required to remove
PCI_DMA_BUS_IS_PHYS, those will be resent separately
Hi all,
this series tries to get rid of the global and PCI_DMA_BUS_IS_PHYS flag,
which causes the block layer and networking code to bounce buffer memory
above the dma mask in some cases. It is a leftover from i386 + highmem
days and is obsolete now that we have swiotlb or iommus so that the
dma
This was used by the ide, scsi and networking code in the past to
determine if they should bounce payloads. Now that the dma mapping
always have to support dma to all physical memory (thanks to swiotlb
for non-iommu systems) there is no need to this crude hack any more.
Signed-off-by: Christoph
