Re: [PATCH RESEND v5 00/18] PCI: dwc: Various fixes and cleanups

[Manivannan Sadhasivam]

On Fri, Jun 24, 2022 at 05:34:10PM +0300, Serge Semin wrote:
> This patchset is a first one in the series created in the framework of
> my Baikal-T1 PCIe/eDMA-related work:
> 
> [1: In-progress v5] PCI: dwc: Various fixes and cleanups
> Link: ---you are looking at it---
> [2: In-progress v3] PCI: dwc: Add hw version and dma-ranges support
> Link: https://lore.kernel.org/linux-pci/20220610084444.14549-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> [3: In-progress v3] PCI: dwc: Add generic resources and Baikal-T1 support
> Link: https://lore.kernel.org/linux-pci/20220610085706.15741-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> [4: In-progress v3] dmaengine: dw-edma: Add RP/EP local DMA support
> Link: https://lore.kernel.org/linux-pci/20220610091459.17612-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> 
> Note it is very recommended to merge the patchsets in the same order as
> they are placed in the list above in order to prevent possible merge
> conflicts. Nothing prevents them from being reviewed synchronously though.
> Any tests are very welcome!
> 
> As it can be easily inferred from the patchset title, this series is about
> the DW PCIe Root Port/Endpoint driver fixes and the code cleanups, where
> fixes come before the cleanup patches. The patchset starts with adding the
> stop_link() platform-specific method invocation in case of the PCIe host
> probe procedure errors. It has been missing in the cleanup-on-error path
> of the DW PCIe Host initialization method. After that the unrolled CSRs
> layout is added to the iATU disable procedure. In third the disable iATU
> procedure is fixed to be called only for the internal ATU as being
> specific for the internal ATU implementation. Then the outbound iATU
> extended region setup procedure is fixed to have the INCREASE_REGION_SIZE
> flag set based on the limit-address - not the region size one. The last
> but not least the CDM-check enabling procedure is fixed to be independent
> from the non-related num_lanes field state.
> 
> Afterwards there is a series of cleanups. It concerns the changes like
> adding braces to the multi-line if-else constructions, trailing new-lines
> to the print format-string, dropping unnecessary version checking, and
> various code simplifications and optimizations.
> 
> New features like adding two-level DT bindings abstraction, adding better
> structured IP-core version interface, adding iATU regions size detection
> and the PCIe regions verification procedure, adding dma-ranges support,
> introducing a set of generic platform clocks and resets and finally adding
> Baikal-T1 PCIe interface support will be submitted in the next part of the
> series.
> 

Just a note that I won't be able to test this series again for some time. My
hardware is broken and it may take couple of weeks for me to get the
replacement. But I'll provide my reviews for all series.

Sorry for that!

Thanks,
Mani

> Link: https://lore.kernel.org/linux-pci/20220324012524.16784-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> Changelog v2:
> - Fix the end address of the example in the patch log with
>   the INCREASE_REGION_SIZE flag usage fixup. It should be
>   0x1000FFFF and not 0x0000FFFF (@Manivannan).
> - Add the cleanup-on-error path to the dw_pcie_ep_init() function.
>   (@Manivannan)
> 
> Link: https://lore.kernel.org/linux-pci/20220503212300.30105-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> Changelog v3:
> - Convert region variable type to u32 in order to fix the implicit type
>   conversion peculiarity. (@kbot)
> - Rebase onto v5.18-rc6.
> 
> Link: https://lore.kernel.org/linux-pci/20220517125058.18488-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> Changelog v4:
> - Move the patch "PCI: dwc: Deallocate EPC memory on EP init error" to
>   being applied before the cleanup patches.
> - Add a new fixes patch: "PCI: dwc: Enable CDM-check independently from
>   the num_lanes value".
> - Add a new cleanup patch: "PCI: dwc: Organize local variables usage".
> - Add a new cleanup patch: "PCI: dwc: Re-use local pointer to the
>   resource data".
> - Add a new cleanup patch: "PCI: dwc: Add start_link/stop_link inliners".
> - Add a new cleanup patch: "PCI: dwc: Move io_cfg_atu_shared to the Root
>   Port descriptor".
> - Add a new cleanup patch: "PCI: dwc: Add dw_ prefix to the pcie_port
>   structure name".
> - Drop the patch "PCI: dwc: Don't use generic IO-ops for DBI-space
>   access". (@Rob)
> - Drop Manivannan tested tag from the changed patches.
> - Rebase onto v5.18.
> 
> Link: https://lore.kernel.org/linux-pci/20220610082535.12802-1-Sergey.Semin@xxxxxxxxxxxxxxxxxxxx/
> Changelog v5:
> - Just resend the series.
> - Rebase onto v5.19-rcX.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> Cc: Alexey Malahov <Alexey.Malahov@xxxxxxxxxxxxxxxxxxxx>
> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@xxxxxxxxxxxxxxxxxxxx>
> Cc: Jingoo Han <jingoohan1@xxxxxxxxx>
> Cc: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
> Cc: "Krzysztof Wilczyński" <kw@xxxxxxxxx>
> Cc: Frank Li <Frank.Li@xxxxxxx>
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> 
> Serge Semin (18):
>   PCI: dwc: Stop link in the host init error and de-initialization
>   PCI: dwc: Add unroll iATU space support to the regions disable method
>   PCI: dwc: Disable outbound windows for controllers with iATU
>   PCI: dwc: Set INCREASE_REGION_SIZE flag based on limit address
>   PCI: dwc: Deallocate EPC memory on EP init error
>   PCI: dwc: Enable CDM-check independently from the num_lanes value
>   PCI: dwc: Add braces to the multi-line if-else statements
>   PCI: dwc: Add trailing new-line literals to the log messages
>   PCI: dwc: Discard IP-core version checking on unrolled iATU detection
>   PCI: dwc: Convert Link-up status method to using dw_pcie_readl_dbi()
>   PCI: dwc: Organize local variables usage
>   PCI: dwc: Re-use local pointer to the resource data
>   PCI: dwc: Add start_link/stop_link inliners
>   PCI: dwc: Move io_cfg_atu_shared to the Root Port descriptor
>   PCI: dwc: Add dw_ prefix to the pcie_port structure name
>   PCI: dwc-plat: Simplify the probe method return value handling
>   PCI: dwc-plat: Discard unused regmap pointer
>   PCI: dwc-plat: Drop dw_plat_pcie_of_match forward declaration
> 
>  drivers/pci/controller/dwc/pci-dra7xx.c       |  12 +--
>  drivers/pci/controller/dwc/pci-exynos.c       |   6 +-
>  drivers/pci/controller/dwc/pci-imx6.c         |   6 +-
>  drivers/pci/controller/dwc/pci-keystone.c     |  20 ++--
>  .../pci/controller/dwc/pci-layerscape-ep.c    |  12 ---
>  drivers/pci/controller/dwc/pci-layerscape.c   |   2 +-
>  drivers/pci/controller/dwc/pci-meson.c        |   2 +-
>  drivers/pci/controller/dwc/pcie-al.c          |   6 +-
>  drivers/pci/controller/dwc/pcie-armada8k.c    |   4 +-
>  drivers/pci/controller/dwc/pcie-artpec6.c     |   4 +-
>  .../pci/controller/dwc/pcie-designware-ep.c   |  30 ++++--
>  .../pci/controller/dwc/pcie-designware-host.c | 102 ++++++++++--------
>  .../pci/controller/dwc/pcie-designware-plat.c |  25 ++---
>  drivers/pci/controller/dwc/pcie-designware.c  |  72 +++++++------
>  drivers/pci/controller/dwc/pcie-designware.h  |  46 +++++---
>  drivers/pci/controller/dwc/pcie-dw-rockchip.c |   4 +-
>  drivers/pci/controller/dwc/pcie-fu740.c       |   2 +-
>  drivers/pci/controller/dwc/pcie-histb.c       |  10 +-
>  drivers/pci/controller/dwc/pcie-intel-gw.c    |   6 +-
>  drivers/pci/controller/dwc/pcie-keembay.c     |   4 +-
>  drivers/pci/controller/dwc/pcie-kirin.c       |   2 +-
>  drivers/pci/controller/dwc/pcie-qcom.c        |   4 +-
>  drivers/pci/controller/dwc/pcie-spear13xx.c   |   6 +-
>  drivers/pci/controller/dwc/pcie-tegra194.c    |  22 ++--
>  drivers/pci/controller/dwc/pcie-uniphier.c    |  10 +-
>  drivers/pci/controller/dwc/pcie-visconti.c    |   6 +-
>  26 files changed, 224 insertions(+), 201 deletions(-)
> 
> -- 
> 2.35.1
> 

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