Re: [PATCH v5 00/09] iommu/ipmmu-vmsa: r8a7795 support V5

[Alex Williamson]

On Mon, 16 Oct 2017 21:29:14 +0900
Magnus Damm <magnus.damm@xxxxxxxxx> wrote:

> iommu/ipmmu-vmsa: r8a7795 support V5
> 
> [PATCH v5 01/09] iommu/ipmmu-vmsa: Introduce features, break out alias
> [PATCH v5 02/09] iommu/ipmmu-vmsa: Add optional root device feature
> [PATCH v5 03/09] iommu/ipmmu-vmsa: Enable multi context support
> [PATCH v5 04/09] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE()
> [PATCH v5 05/09] iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master
> [PATCH v5 06/09] iommu/ipmmu-vmsa: Write IMCTR twice
> [PATCH v5 07/09] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional
> [PATCH v5 08/09] iommu/ipmmu-vmsa: Allow two bit SL0
> [PATCH v5 09/09] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code
> 
> This is V5 of r8a7795 IPMMU driver where the series has been rebased
> and reworked to fit on next-20171013 that includes:
> [PATCH v2 00/05] iommu/ipmmu-vmsa: 32-bit ARM update V2
> [PATCH] iommu/ipmmu-vmsa: Use iommu_device_sysfs_add()/remove()
> 
> The major feature change is in patch 2/9 that now gets by without
> using a local list of registered IPMMU devices and instead relies
> on driver_for_each_device(). Thanks to Robin Murphy for his 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.
> 
> Changes since V4:
>  - Rebased on top of [PATCH v2 00/05] iommu/ipmmu-vmsa: 32-bit ARM update V2
>  - Reworked root device handling to make use of driver_for_each_device()
>  - Added deferred probing to make sure root device always is present
> 
> Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
> ---
> 
>  Developed on top of next-20171013
>  Also applies to renesas-drivers-2017-10-03-v4.14-rc3
>  Tested on top of renesas-drivers on r8a7796-m3ulcb using /dev/ttySC1
>   - [PATCH v4 0/3] iommu/ipmmu-vmsa: r8a7796 support V4
>   - local /dev/ttySC1 enablement for testing purpose
>   - local DTS changes to hook up SYS-DMAC and IPMMU DS0, DS1 and MM
>   - local whitelist code to enable "e7310000.dma-controller"
>  
>  drivers/iommu/ipmmu-vmsa.c |  310 ++++++++++++++++++++++++++++++++++----------
>  1 file changed, 244 insertions(+), 66 deletions(-)

Applied to iommu/ipmmu-vmsa for v4.15.  Thanks,

Alex