[PATCH v4] iommu/rockchip: Add missing set_platform_dma_ops callback
joro at 8bytes.org
Thu Apr 13 02:51:14 PDT 2023
On Fri, Mar 31, 2023 at 10:51:54AM +0100, 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 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 at arm.com>
> Changes since v3:
> * Added a dummy free callback to rk_identity_ops.
>  https://lore.kernel.org/r/20230330144604.2431436-1-steven.price%40arm.com
> drivers/iommu/rockchip-iommu.c | 61 ++++++++++++++++++++++++++--------
> 1 file changed, 47 insertions(+), 14 deletions(-)
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