Chao Hao chao.hao at mediatek.com
Mon Jun 29 03:13:00 EDT 2020

This patchset adds mt6779 iommu support.
mt6779 has two iommus, they are MM_IOMMU(M4U) and APU_IOMMU which used ARM Short-Descriptor translation format.
The mt6779's MM_IOMMU-SMI and APU_IOMMU HW diagram is as below, it is only a brief diagram:

      |                                    |
   MM_IOMMU                            APU_IOMMU
      |                                    |
   SMI_COMMOM-----------                 APU_BUS
      |                |                   |
   SMI_LARB(0~11)      |                   |
      |                |                   |
      |                |             --------------
      |                |             |     |      |
 Multimedia engine    CCU           VPU   MDLA   EMDA

 All the connections are hardware fixed, software can not adjust it.
 Compared with mt8183, SMI_BUS_ID width has changed from 10 to 12. SMI Larb number is described in bit[11:7],
 Port number is described in bit[6:2]. In addition, there are some registers has changed in mt6779, so we need
 to redefine and reuse them.

 The patchset only used MM_IOMMU, so we only add MM_IOMMU basic function, such as smi_larb port definition, registers
 definition and hardware initialization.

 change notes:
   1. Split "iommu/mediatek: Add mt6779 IOMMU basic support(patch v4)" to three patches(from PATCH v5 08/10 to PATCH v5 10/10).
   2. Use macro definitions to replace bool values in mtk_iommu_plat_data structure

   1. Rebase on v5.8-rc1.
   2. Fix coding style.
   3. Add F_MMU_IN_DRDER_WR_EN definition in MISC_CTRL to improve performance.

   1. Rebase on v5.7-rc1.
   2. Remove unused port definition,ex:APU and CCU port in mt6779-larb-port.h.
   3. Remove "change single domain to multiple domain" part(from PATCH v2 09/19 to PATCH v2 19/19).
   4. Redesign mt6779 basic part
      (1)Add some register definition and reuse them.
      (2)Redesign smi larb bus ID to analyze IOMMU translation fault.
      (3)Only init MM_IOMMU and not use APU_IOMMU.

   1. Rebase on v5.5-rc1.
   2. Delete M4U_PORT_UNKNOWN define because of not use it.
   3. Correct coding format.
   4. Rename offset=0x48 register.
   5. Split "iommu/mediatek: Add mt6779 IOMMU basic support(patch v1)" to several patches(patch v2).


Chao Hao (10):
  dt-bindings: mediatek: Add bindings for MT6779
  iommu/mediatek: Rename the register STANDARD_AXI_MODE(0x48) to MISC_CTRL
  iommu/mediatek: Modify the usage of mtk_iommu_plat_data structure
  iommu/mediatek: Setting MISC_CTRL register
  iommu/mediatek: Move inv_sel_reg into the plat_data
  iommu/mediatek: Add sub_comm id in translation fault
  iommu/mediatek: Add REG_MMU_WR_LEN register definition
  iommu/mediatek: Extend protect pa alignment value
  iommu/mediatek: Modify MMU_CTRL register setting
  iommu/mediatek: Add mt6779 basic support

  .../bindings/iommu/mediatek,iommu.txt         |   2 +
  drivers/iommu/mtk_iommu.c                     | 100 ++++++---
  drivers/iommu/mtk_iommu.h                     |  26 ++-
  include/dt-bindings/memory/mt6779-larb-port.h | 206 ++++++++++++++++++
  include/soc/mediatek/smi.h                    |   2 +
  5 files changed, 299 insertions(+), 37 deletions(-)


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