linux-kernel - Re: [PATCHv4 00/28] PCI: refactor Mobiveil driver and add PCIe Gen4 driver for NXP Layerscape SoCs

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Message-ID: <20190326173730.GC10666@e107981-ln.cambridge.arm.com>
Date:   Tue, 26 Mar 2019 17:37:30 +0000
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     "Z.q. Hou" <zhiqiang.hou@....com>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>
Subject: Re: [PATCHv4 00/28] PCI: refactor Mobiveil driver and add PCIe Gen4
 driver for NXP Layerscape SoCs

On Mon, Mar 11, 2019 at 09:29:54AM +0000, Z.q. Hou wrote:
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
> 
> This patch set is aim to refactor the Mobiveil driver and add
> PCIe support for NXP Layerscape series SoCs integrated Mobiveil's
> PCIe Gen4 controller.
> 
> Hou Zhiqiang (28):
>   PCI: mobiveil: uniform the register accessors
>   PCI: mobiveil: format the code without function change
>   PCI: mobiveil: correct the returned error number
>   PCI: mobiveil: remove flag MSI_FLAG_MULTI_PCI_MSI
>   PCI: mobiveil: correct PCI base address in MEM/IO outbound windows
>   PCI: mobiveil: replace the resource list iteration function
>   PCI: mobiveil: use WIN_NUM_0 explicitly for CFG outbound window
>   PCI: mobiveil: use the 1st inbound window for MEM inbound transactions
>   PCI: mobiveil: correct inbound/outbound window setup routines
>   PCI: mobiveil: fix the INTx process error
>   PCI: mobiveil: only fix up the Class Code field
>   PCI: mobiveil: move out the link up waiting from mobiveil_host_init
>   PCI: mobiveil: move irq chained handler setup out of DT parse
>   PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number
>   dt-bindings: pci: mobiveil: change gpio_slave and apb_csr to optional
>   PCI: mobiveil: refactor Mobiveil PCIe Host Bridge IP driver
>   PCI: mobiveil: fix the checking of valid device
>   PCI: mobiveil: add link up condition check
>   PCI: mobiveil: continue to initialize the host upon no PCIe link
>   PCI: mobiveil: disabled IB and OB windows set by bootloader
>   PCI: mobiveil: add Byte and Half-Word width register accessors
>   PCI: mobiveil: make mobiveil_host_init can be used to re-init host
>   dt-bindings: pci: Add NXP Layerscape SoCs PCIe Gen4 controller
>   PCI: mobiveil: add PCIe Gen4 RC driver for NXP Layerscape SoCs
>   PCI: mobiveil: ls_pcie_g4: add Workaround for A-011577
>   PCI: mobiveil: ls_pcie_g4: add Workaround for A-011451
>   arm64: dts: freescale: lx2160a: add pcie DT nodes
>   arm64: defconfig: Enable CONFIG_PCI_LAYERSCAPE_GEN4
> 
>  .../bindings/pci/layerscape-pci-gen4.txt      |  52 ++
>  .../devicetree/bindings/pci/mobiveil-pcie.txt |   2 +
>  MAINTAINERS                                   |  10 +-
>  .../arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 163 ++++
>  arch/arm64/configs/defconfig                  |   1 +
>  drivers/pci/controller/Kconfig                |  11 +-
>  drivers/pci/controller/Makefile               |   2 +-
>  drivers/pci/controller/mobiveil/Kconfig       |  34 +
>  drivers/pci/controller/mobiveil/Makefile      |   5 +
>  .../controller/mobiveil/pci-layerscape-gen4.c | 306 +++++++
>  .../controller/mobiveil/pcie-mobiveil-host.c  | 640 +++++++++++++
>  .../controller/mobiveil/pcie-mobiveil-plat.c  |  54 ++
>  .../pci/controller/mobiveil/pcie-mobiveil.c   | 246 +++++
>  .../pci/controller/mobiveil/pcie-mobiveil.h   | 229 +++++
>  drivers/pci/controller/pcie-mobiveil.c        | 861 ------------------
>  15 files changed, 1743 insertions(+), 873 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pci/layerscape-pci-gen4.txt
>  create mode 100644 drivers/pci/controller/mobiveil/Kconfig
>  create mode 100644 drivers/pci/controller/mobiveil/Makefile
>  create mode 100644 drivers/pci/controller/mobiveil/pci-layerscape-gen4.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
>  create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
>  delete mode 100644 drivers/pci/controller/pcie-mobiveil.c

This patch series is a mixture of fixes, refactoring and development
and to be frank it is a bit hard to review. Keeping in mind all
the review comments already received and that I expect you to integrate,
do you mind splitting it in logical series each one serving a specific
purpose (eg fixes, Layerscape support, etc.) ?

Let's start with posting and merging the fixes first.

Thank you very much.

Lorenzo