iommu/ipmmu-vmsa: r8a7795 support V3 [PATCH v3 01/09] iommu/ipmmu-vmsa: Introduce features, break out alias [PATCH v3 02/09] iommu/ipmmu-vmsa: Add optional root device feature [PATCH v3 03/09] iommu/ipmmu-vmsa: Enable multi context support [PATCH v3 04/09] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE() [PATCH v3 05/09] iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master [PATCH v3 06/09] iommu/ipmmu-vmsa: Write IMCTR twice [PATCH v3 07/09] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional [PATCH v3 08/09] iommu/ipmmu-vmsa: Allow two bit SL0 [PATCH v3 09/09] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code This series contains a much needed r8a7795 support update for the IPMMU driver. Last series was earlier posted as: [PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2 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(). This version of the code is known to build on 32-bit and 64-bit ARM. Some patches that existed in V1 have been folded into: [PATCH v7 00/07] iommu/ipmmu-vmsa: IPMMU multi-arch update V7 Changes since V2: - Patch 2/9 has been updated with a bug fix and to supply __ipmmu_find_root() - Patch 4/9 now makes use of iommu_device_* functions - Patch 5/9 sets the mask to 40 bits instead of 64 bits - Patch 9/9 implements white list handling via ->xlate() and fixes a bug Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> --- Developed on top of v4.11-rc1 and: [PATCH v7 00/07] iommu/ipmmu-vmsa: IPMMU multi-arch update V7 drivers/iommu/ipmmu-vmsa.c | 291 +++++++++++++++++++++++++++++++++++++------- 1 file changed, 251 insertions(+), 40 deletions(-)
