iommu/rockchip: Add missing set_platform_dma_ops callback

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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 add support for IOMMU_DOMAIN_IDENTITY and 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>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20230331095154.2671129-1-steven.price@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

...

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Steven Price 2023-03-31 10:51:54 +01:00 • committed by Joerg Roedel

parent e8d018dd02

commit 25c2325575

1 changed files with 47 additions and 14 deletions

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drivers/iommu/rockchip-iommu.c

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