Re: [PATCH v4] iommu/rockchip: Add missing set_platform_dma_ops callback
From: Heiko Stübner <heiko@sntech.de>
Date: 2023-03-31 22:22:58
Also in:
linux-iommu, linux-rockchip, lkml
Am Freitag, 31. März 2023, 11:51:54 CEST schrieb Steven Price:
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>
My knowledge of IOMMU magic is not that deep. Nevertheless I do believe to mostly understand the change and the splats on my rk3288-pinky are gone now with this patch: Acked-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel