title: SDHI; improve performance by using IPMMU (change max_segs)
team: IO
key: 05fce9ea-4149-4362-ad6c-6e2992cbc33b
assignee: Shimoda
status: Done

upstream:
  - torvalds: 45147fb522bb459e79bdcb7504ee7ec8cfd4c12c # block: add a helper function to merge the segments
  - torvalds: 38c38cb73223218f6eedf485280917af1f8a0af2 # mmc: queue: use bigger segments if DMA MAP layer can merge the segments
  - torvalds: 6ba99411b858bd70bae966633561e698cd6de38c # dma-mapping: introduce dma_get_merge_boundary()
  - torvalds: 158a6d3ce3bcfcd6e6650f80b16efcf64f8b6bf8 # iommu/dma: add a new dma_map_ops of get_merge_boundary()

comments:
  - "https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=110485"
  - "v2 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=116729"
  - "v3 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=120985"
  - "v4 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=125593"
  - "v5 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=127511"
  - "v6 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=131769"
  - "v7 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=135391"
  - "v8 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=149023"
  - "v9 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=151067"
  - "v9 pinged again to get maintainer acks"
  - "v10 https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=166501"
  - "regression fix: https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=173115"