[PATCH v5 00/14] Fix and improve the Rockchip endpoint driver

[Manivannan Sadhasivam]

On Thu, Oct 17, 2024 at 10:58:35AM +0900, Damien Le Moal wrote:
> This patch series fix the PCI address mapping handling of the Rockchip
> PCI endpoint driver, refactor some of its code, improves link training
> and adds handling of the PERST# signal.
> 
> This series is organized as follows:
>  - Patch 1 fixes the rockchip ATU programming
>  - Patch 2, 3 and 4 introduce small code improvments
>  - Patch 5 implements the .align_addr() operation to make the RK3399
>    endpoint controller driver fully functional with the new
>    pci_epc_mem_map() function
>  - Patch 6 uses the new align_addr operation function to fix the ATU
>    programming for MSI IRQ data mapping
>  - Patch 7, 8, 9 and 10 refactor the driver code to make it more
>    readable
>  - Patch 11 introduces the .stop() endpoint controller operation to
>    correctly disable the endpopint controller after use
>  - Patch 12 improves link training
>  - Patch 13 implements handling of the #PERST signal
>  - Patch 14 adds a DT overlay file to enable EP mode and define the
>    PERST# GPIO (reset-gpios) property.
> 

Damien, please wait for my review before spinning the next revision. Sorry for
the delay.

- Mani

> These patches were tested using a Pine Rockpro64 board used as an
> endpoint with the test endpoint function driver and a prototype nvme
> endpoint function driver.
> 
> Changes from v4:
>  - Added patch 6
>  - Added comments to patch 12 and 13 to clarify link training handling
>    and PERST# GPIO use.
>  - Added patch 14
> 
> Changes from v3:
>  - Addressed Mani's comments (see mailing list for details).
>  - Removed old patch 11 (dt-binding changes) and instead use in patch 12
>    the already defined reset_gpios property.
>  - Added patch 6
>  - Added review tags
> 
> Changes from v2:
>  - Split the patch series
>  - Corrected patch 11 to add the missing "maxItem"
> 
> Changes from v1:
>  - Changed pci_epc_check_func() to pci_epc_function_is_valid() in patch
>    1.
>  - Removed patch "PCI: endpoint: Improve pci_epc_mem_alloc_addr()"
>    (former patch 2 of v1)
>  - Various typos cleanups all over. Also fixed some blank space
>    indentation.
>  - Added review tags
> 
> Damien Le Moal (14):
>   PCI: rockchip-ep: Fix address translation unit programming
>   PCI: rockchip-ep: Use a macro to define EP controller .align feature
>   PCI: rockchip-ep: Improve rockchip_pcie_ep_unmap_addr()
>   PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr()
>   PCI: rockchip-ep: Implement the pci_epc_ops::align_addr() operation
>   PCI: rockchip-ep: Fix MSI IRQ data mapping
>   PCI: rockchip-ep: Rename rockchip_pcie_parse_ep_dt()
>   PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations
>   PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSI-X hiding
>   PCI: rockchip-ep: Refactor endpoint link training enable
>   PCI: rockship-ep: Implement the pci_epc_ops::stop_link() operation
>   PCI: rockchip-ep: Improve link training
>   PCI: rockchip-ep: Handle PERST# signal in endpoint mode
>   arm64: dts: rockchip: Add rockpro64 overlay for PCIe endpoint mode
> 
>  arch/arm64/boot/dts/rockchip/Makefile         |   1 +
>  .../rockchip/rk3399-rockpro64-pcie-ep.dtso    |  20 +
>  drivers/pci/controller/pcie-rockchip-ep.c     | 432 ++++++++++++++----
>  drivers/pci/controller/pcie-rockchip-host.c   |   4 +-
>  drivers/pci/controller/pcie-rockchip.c        |  21 +-
>  drivers/pci/controller/pcie-rockchip.h        |  24 +-
>  6 files changed, 406 insertions(+), 96 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3399-rockpro64-pcie-ep.dtso
> 
> -- 
> 2.47.0
> 

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