iommu/ipmmu-vmsa: Initial r8a7795 support [PATCH 01/10] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() [PATCH 02/10] iommu/ipmmu-vmsa: Enable multi context support [PATCH 03/10] iommu/ipmmu-vmsa: Teach xlate() to skip disabled iommus [PATCH 04/10] iommu/ipmmu-vmsa: IPMMU device is 64-bit bus master [PATCH 05/10] iommu/ipmmu-vmsa: Introduce features, break out alias [PATCH 06/10] iommu/ipmmu-vmsa: Add optional root device feature [PATCH 07/10] iommu/ipmmu-vmsa: Write IMCTR twice [PATCH 08/10] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional [PATCH 09/10] iommu/ipmmu-vmsa: Allow two bit SL0 [PATCH 10/10] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code This series contains slightly more mature r8a7795 support for the IPMMU driver compared to the earlier series posted as: [PATCH/RFC 00/10] iommu/ipmmu-vmsa: Experimental r8a7795 support The DT binding for r8a7795 has been accepted for upstream merge and this series implements support following such format: d4e42e7 iommu/ipmmu-vmsa: Add r8a7795 DT binding The r8a7795 IPMMU is almost register compatible with earlier devices like r8a7790-r8a7794, however some bitfields have been shifted slightly. On a grander scale topology has been added and interrupts have been reworked. So now there are several "cache" IPMMU units without interrupt that somehow communicate with IPMMU-MM that is the only instance that supports interrupts. The code refers to IPMMU-MM as a "root" device and the other ones as leaf nodes. To make this more interesting the IPMMU driver needs to be shared between 32-bit ARM for r8a7790-r8a7794 and 64-bit ARM for r8a7795. In practice this means that two separate implementations are needed inside the driver to attach to the rather different architecture specific code. CONFIG_IOMMU_DMA=y is needed on 64-bit ARM while on 32-bit ARM the arch specific dma-mapping code is hooked up rather directly. During init 64-bit ARM IPMMU support is relying on IOMMU_OF_DECLARE(). The code is known to build on 32-bit and 64-bit ARM and x86_64. Tested on 32-bit ARM and 64-bit ARM with addtional DT integration changes. Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> --- Developed on top of next-20160315 and: [PATCH v2 00/04] iommu/ipmmu-vmsa: IPMMU multi-arch update V2 [PATCH 00/04] iommu/ipmmu-vmsa: IPMMU CONFIG_IOMMU_DMA update drivers/iommu/ipmmu-vmsa.c | 231 ++++++++++++++++++++++++++++++++++++-------- 1 file changed, 191 insertions(+), 40 deletions(-)
