Re: [PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2

[Joerg Roedel]

On Mon, Jun 06, 2016 at 12:57:23PM +0900, Magnus Damm wrote:
>  Developed on top of next-20160602 and:
>  [PATCH v3 00/06] iommu/ipmmu-vmsa: IPMMU multi-arch update V3
> 
>  drivers/iommu/ipmmu-vmsa.c |  318 
> +---
>  1 file changed, 269 insertions(+), 49 deletions(-)

Okay, what is the plan on merging this? It is developed on linux-next
and doesn't apply on v4.7-rc4. From the areas it touches it should go
through the iommu-tree, unless there are good reasons not to.


Joerg

P.S.: Same question applies to your other two patch-sets.

Re: [PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2

[Geert Uytterhoeven]

Hi Magnus,

On Mon, Jun 6, 2016 at 5:57 AM, Magnus Damm  wrote:
> iommu/ipmmu-vmsa: r8a7795 support V2
>
> [PATCH v2 01/11] iommu/ipmmu-vmsa: Introduce features, break out alias
> [PATCH v2 02/11] iommu/ipmmu-vmsa: Add optional root device feature
> [PATCH v2 03/11] iommu/ipmmu-vmsa: Enable multi context support
> [PATCH v2 04/11] iommu/ipmmu-vmsa: Reuse iommu groups
> [PATCH v2 05/11] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE()
> [PATCH v2 06/11] iommu/ipmmu-vmsa: Teach xlate() to skip disabled iommus
> [PATCH v2 07/11] iommu/ipmmu-vmsa: IPMMU device is 64-bit bus master
> [PATCH v2 08/11] iommu/ipmmu-vmsa: Write IMCTR twice
> [PATCH v2 09/11] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional
> [PATCH v2 10/11] iommu/ipmmu-vmsa: Allow two bit SL0
> [PATCH v2 11/11] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code

Thanks for your series!

For your convenience, I've queued it up in topic/r8a7795-ipmmu-v2 at
https://git.kernel.org/cgit/linux/kernel/git/geert/renesas-drivers.git, and
will include it in next renesas-drivers release.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

[PATCH v2 00/11] iommu/ipmmu-vmsa: r8a7795 support V2

[Magnus Damm]

iommu/ipmmu-vmsa: r8a7795 support V2

[PATCH v2 01/11] iommu/ipmmu-vmsa: Introduce features, break out alias
[PATCH v2 02/11] iommu/ipmmu-vmsa: Add optional root device feature
[PATCH v2 03/11] iommu/ipmmu-vmsa: Enable multi context support
[PATCH v2 04/11] iommu/ipmmu-vmsa: Reuse iommu groups
[PATCH v2 05/11] iommu/ipmmu-vmsa: Make use of IOMMU_OF_DECLARE()
[PATCH v2 06/11] iommu/ipmmu-vmsa: Teach xlate() to skip disabled iommus
[PATCH v2 07/11] iommu/ipmmu-vmsa: IPMMU device is 64-bit bus master
[PATCH v2 08/11] iommu/ipmmu-vmsa: Write IMCTR twice
[PATCH v2 09/11] iommu/ipmmu-vmsa: Make IMBUSCTR setup optional
[PATCH v2 10/11] iommu/ipmmu-vmsa: Allow two bit SL0
[PATCH v2 11/11] iommu/ipmmu-vmsa: Hook up r8a7795 DT matching code

This series contains updated r8a7795 support for the IPMMU driver
compared to the earlier series posted as:

[PATCH 00/10] iommu/ipmmu-vmsa: Initial 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().

This version of the code is known to build on 32-bit and 64-bit ARM.

Compared to V1 the patches have been reordered and multi context
and iommu group code has been reworked. Now devices are grouped
together based on the IPMMU they are connected to. For detail
please see the change log in each individual patch.

Signed-off-by: Magnus Damm 
---

 Developed on top of next-20160602 and:
 [PATCH v3 00/06] iommu/ipmmu-vmsa: IPMMU multi-arch update V3

 drivers/iommu/ipmmu-vmsa.c |  318 +---
 1 file changed, 269 insertions(+), 49 deletions(-)