On Fri, Mar 24, 2023 at 11:11:27AM +0000, Steven Price wrote:

Similar to exynos, we need a set_platform_dma_ops() callback for proper
operation on ARM 32 bit after recent changes in the IOMMU framework
(detach ops removal). But also the use of a NULL domain is confusing.

Rework the code to have a singleton rk_identity_domain which is assigned
to domain when using an identity mapping rather than "detaching". This
makes the code easier to reason about.

Signed-off-by: Steven Price <steven.price@arm.com>
---
Changes since v1[1]:

 * Reworked the code to avoid a NULL domain, instead a singleton
   rk_identity_domain is used instead. The 'detach' language is no
   longer used.

[1] https://lore.kernel.org/r/20230315164152.333251-1-steven.price%40arm.com

 drivers/iommu/rockchip-iommu.c | 50 ++++++++++++++++++++++++++--------
 1 file changed, 39 insertions(+), 11 deletions(-)

Aside from the pm stuff this looks OK to me

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Thanks,
Jason

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel