Hello, This series addresses multiple shortcomings of the GART driver: 1. Thierry noticed that Memory Controller driver uses registers that belong to GART in [0] and for now MC driver only reports the fact of GART's page fault. The first two patches of the series are addressing this shortcoming. [0] https://www.spinics.net/lists/linux-tegra/msg33072.html 2. Currently GART is kept disabled by the commit c7e3ca515e784 ("iommu/tegra: gart: Do not register with bus"). If GART is re-enabled than all devices in the system are getting assigned to the GART as it is a global systems IOMMU provider. This is wrong simply because GART doesn't handle all those devices. This series makes GART to accept only devices that are explicitly assigned to GART in device tree using 'iommu' phandle. 3. This series makes a generic clean up of the driver by removing dead code, allowing to have one IOMMU domain at max, etc. 4. This series introduces and utilizes iotlb_sync_map() callback that was previously suggested by Joerg Roedel in [1]. [1] https://www.spinics.net/lists/linux-tegra/msg32914.html Dmitry Osipenko (9): memory: tegra: Provide facility for integration with the GART driver iommu/tegra: gart: Provide access to Memory Controller driver iommu/tegra: gart: Remove code related to module unloading iommu/tegra: gart: Remove pr_fmt and clean up includes iommu/tegra: gart: Clean up driver probe failure unwinding iommu/tegra: gart: Ignore devices without IOMMU phandle in DT iommu/tegra: gart: Provide single domain and group for all devices iommu: Introduce iotlb_sync_map callback iommu/tegra: gart: Optimize mapping / unmapping performance drivers/iommu/iommu.c | 8 +- drivers/iommu/tegra-gart.c | 216 +++++++++++++++++-------------------- drivers/memory/tegra/mc.c | 26 ++++- include/linux/iommu.h | 1 + include/soc/tegra/mc.h | 13 +++ 5 files changed, 143 insertions(+), 121 deletions(-) -- 2.17.0 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
