Hi Will,
On 14/11/14 18:56, Will Deacon wrote:
Hello everybody,
Here is the fourth iteration of the RFC I've previously posted here:
RFCv1:
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-August/283023.html
RFCv2:
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/283752.html
RFCv3:
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/287031.html
Changes since RFCv3 include:
- Drastic simplification of the data structures, so that we no longer
pass around lists of domains. Instead, dma-mapping is expected to
allocate the domain (Joerg talked about adding a get_default_domain
operation to iommu_ops).
- iommu_ops is used to hold the per-instance IOMMU data
- Configuration of DMA segments added to of_dma_configure
All feedback welcome.
This proposal has been really useful in getting IOMMU DMA mapping
running on arm64, so with the proviso that patch 6 definitely causes
problems, and patches 7 and 8 ported to arm64 rather than used directly,
for the series:
Tested-by: Robin Murphy <robin.mur...@arm.com>
Hopefully it's now stable enough that I can finish cleaning up my
hacked-up SMMU driver (oh, the rebasing pain :P)
Thanks,
Robin.
Cheers,
Will
--->8
Will Deacon (8):
iommu: provide early initialisation hook for IOMMU drivers
dma-mapping: replace set_arch_dma_coherent_ops with arch_setup_dma_ops
iommu: add new iommu_ops callback for adding an OF device
iommu: provide helper function to configure an IOMMU for an of master
dma-mapping: detect and configure IOMMU in of_dma_configure
dma-mapping: set dma segment properties in of_dma_configure
arm: call iommu_init before of_platform_populate
arm: dma-mapping: plumb our iommu mapping ops into arch_setup_dma_ops
arch/arm/include/asm/dma-mapping.h | 12 +++---
arch/arm/kernel/setup.c | 2 +
arch/arm/mm/dma-mapping.c | 80 ++++++++++++++++++++++++++++++++++----
drivers/iommu/Kconfig | 2 +-
drivers/iommu/of_iommu.c | 50 ++++++++++++++++++++++++
drivers/of/platform.c | 54 +++++++++++++------------
include/asm-generic/vmlinux.lds.h | 2 +
include/linux/amba/bus.h | 1 +
include/linux/dma-mapping.h | 13 ++++---
include/linux/iommu.h | 8 ++++
include/linux/of_iommu.h | 31 +++++++++++++++
include/linux/platform_device.h | 2 +
12 files changed, 214 insertions(+), 43 deletions(-)
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