> For dma transfers to/from user space buffer, one need to lock that user
> space buffer so that it won't be swaped out. and also
> its bus address is obtained by call virt_to_bus and then this bus address
> is written to dma controller.
Thats what the kiovecs deal with yes
> but do we explicitl
hi all,
For dma transfers to/from user space buffer, one need to lock that user
space buffer so that it won't be swaped out. and also
its bus address is obtained by call virt_to_bus and then this bus address
is written to dma controller.
but do we explicitly need to map that user buffer into kerne
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