[PATCH v3 0/7] IOMMU/DMA map_resource support for peer-to-peer

[<wdavis@nvidia.com>]

From: Will Davis <wdavis@nvidia.com>

Hi,

This is the third version of a patchset to add the DMA APIs necessary to
map and unmap a struct resource to and from a PCI device's IOVA domain.
This allows a PCI device to access a peer device's BAR resource when a
hardware IOMMU is enabled.

Thanks,
Will

Changelog:

v3:
- changed dma_map_resource() to BUG() if the map_resource DMA op is not
  provided, instead of returning 0
- updated documentation to remove requirement to check for 0 return value
  as an error
- remove const keyword from struct dma_map_ops in new DMA APIs for
  consistency with other APIs

v2: http://www.spinics.net/lists/linux-pci/msg41192.html
- added documentation for the new DMA APIs
- fixed physical-to-bus address conversion in the nommu implementation

v1: http://www.spinics.net/lists/linux-pci/msg40747.html

Will Davis (7):
  dma-debug: add checking for map/unmap_resource
  DMA-API: Introduce dma_(un)map_resource
  dma-mapping: pci: add pci_(un)map_resource
  DMA-API: Add dma_(un)map_resource() documentation
  iommu/amd: Implement (un)map_resource
  iommu/vt-d: implement (un)map_resource
  x86: add pci-nommu implementation of map_resource

 Documentation/DMA-API-HOWTO.txt          | 36 ++++++++++++++-
 Documentation/DMA-API.txt                | 31 ++++++++++---
 arch/x86/kernel/pci-nommu.c              | 32 ++++++++++++++
 drivers/iommu/amd_iommu.c                | 76 ++++++++++++++++++++++++++------
 drivers/iommu/intel-iommu.c              | 18 ++++++++
 include/asm-generic/dma-mapping-broken.h |  9 ++++
 include/asm-generic/dma-mapping-common.h | 34 ++++++++++++++
 include/asm-generic/pci-dma-compat.h     | 14 ++++++
 include/linux/dma-debug.h                | 20 +++++++++
 include/linux/dma-mapping.h              |  7 +++
 lib/dma-debug.c                          | 47 ++++++++++++++++++++
 11 files changed, 304 insertions(+), 20 deletions(-)

-- 
2.4.0