On Thu, Oct 24, 2019 at 12:41:41PM +0000, Laurentiu Tudor wrote: > From: Laurentiu Tudor <laurentiu.tu...@nxp.com> > > Introduce a few new dma unmap and sync variants that, on top of the > original variants, return the virtual address corresponding to the > input dma address. > In order to implement this a new dma map op is added and used: > void *get_virt_addr(dev, dma_handle); > It does the actual conversion of an input dma address to the output > virtual address.
We'll definitively need an implementation for dma-direct at least as well. Also as said previously we need a dma_can_unmap_by_dma_addr() or similar helper that tells the driver beforehand if this works, so that the driver can either use a sub-optimal workaround or fail the probe if this functionality isn't implemented. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
