[PATCH v2 0/3] dma-mapping: introduce new dma unmap and sync variants

From: Laurentiu Tudor
Date: Thu Oct 24 2019 - 08:41:47 EST

From: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>

This series introduces a few new dma unmap and sync api variants that,
on top of what the originals do, return the virtual address
corresponding to the input dma address. In order to do that a new dma
map op is added, .get_virt_addr that takes the input dma address and
returns the virtual address backing it up.
The second patch adds an implementation for this new dma map op in the
generic iommu dma glue code and wires it in.
The third patch updates the dpaa2-eth driver to use the new apis.

Context: https://lkml.org/lkml/2019/5/31/684

Changes in v2
* use "dma_unmap_*_desc" names (Robin)
* return va/page instead of phys addr (Robin)

Changes since RFC
* completely changed the approach: added unmap and sync variants that
return the phys addr instead of adding a new dma to phys conversion

Laurentiu Tudor (3):
dma-mapping: introduce new dma unmap and sync api variants
iommu/dma: wire-up new dma map op .get_virt_addr
dpaa2_eth: use new unmap and sync dma api variants

drivers/iommu/dma-iommu.c | 16 ++++++
.../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 40 +++++---------
.../net/ethernet/freescale/dpaa2/dpaa2-eth.h | 1 -
include/linux/dma-mapping.h | 55 +++++++++++++++++++
4 files changed, 86 insertions(+), 26 deletions(-)