Some hardware variants contain a system level cache or the last level cache(llc). This cache is typically a large block which is shared by multiple clients on the SOC. GPU uses the system cache to cache both the GPU data buffers(like textures) as well the SMMU pagetables. This helps with improved render performance as well as lower power consumption by reducing the bus traffic to the system memory. The system cache architecture allows the cache to be split into slices which then be used by multiple SOC clients. This patch series is an effort to enable and use two of those slices perallocated for the GPU, one for the GPU data buffers and another for the GPU SMMU hardware pagetables. v2: Fixed code review comments from previous round. The first version was posted a few months ago, so this is a refresh of the previous series. Update code to conform to the newer version of the core llcc driver. Minor tweaks and adjustments here and there. Testing: Nothing breaks, but need to profile DDR traffic to see the impact the cache blocks are really making. Please review... Jordan Crouse (1): soc: qcom: llcc-slice: Add error checks for API functions Sharat Masetty (5): drm/msm: rearrange the gpu_rmw() function drm/msm/adreno: Add registers in the GPU CX domain arm64:dts:sdm845: Add register range for gpu CX drm/msm: Pass mmu features to generic layers drm/msm/a6xx: Add support for using system cache(LLC) Vivek Gautam (1): iommu/arm-smmu: Add support to use Last level cache arch/arm64/boot/dts/qcom/sdm845.dtsi | 4 +- drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 2 +- drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 2 +- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 2 +- drivers/gpu/drm/msm/adreno/a6xx.xml.h | 3 + drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 159 +++++++++++++++++++++++++++++++- drivers/gpu/drm/msm/adreno/a6xx_gpu.h | 9 ++ drivers/gpu/drm/msm/adreno/adreno_gpu.c | 4 +- drivers/gpu/drm/msm/adreno/adreno_gpu.h | 2 +- drivers/gpu/drm/msm/msm_drv.c | 8 ++ drivers/gpu/drm/msm/msm_drv.h | 1 + drivers/gpu/drm/msm/msm_gpu.c | 6 +- drivers/gpu/drm/msm/msm_gpu.h | 6 +- drivers/gpu/drm/msm/msm_iommu.c | 13 +++ drivers/gpu/drm/msm/msm_mmu.h | 14 +++ drivers/iommu/arm-smmu.c | 14 +++ drivers/iommu/io-pgtable-arm.c | 24 ++++- drivers/iommu/io-pgtable.h | 4 + drivers/soc/qcom/llcc-slice.c | 15 ++- include/linux/iommu.h | 4 + 20 files changed, 276 insertions(+), 20 deletions(-) -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
