Date:   Fri, 10 Jun 2022 11:49:18 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Frank Li <Frank.Li@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 00/15] PCI: dwc: Add hw version and dma-ranges support

On Fri, Jun 10, 2022 at 11:44:28AM +0300, Serge Semin wrote:
> This patchset is a second one in the series created in the framework of
> my Baikal-T1 PCIe/eDMA-related work:
> 
> [1: In-progress v4] PCI: dwc: Various fixes and cleanups
> Link: https://lore.kernel.org/linux-pci/20220610082535.12802-1-Sergey.Semin@baikalelectronics.ru/
> [2: In-progress v3] PCI: dwc: Add hw version and dma-ranges support
> Link: ---you are looking at it---
> [3: In-progress v3] PCI: dwc: Add extended YAML-schema and Baikal-T1 support
> Link: ---being submitted afterwards---
> [4: In-progress v2] dmaengine: dw-edma: Add RP/EP local DMA support
> Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@baikalelectronics.ru/
> 
> Note it is very recommended to merge the patchsets in the same order as
> they are listed in the set above in order to have them applied smoothly.
> Nothing prevents them from being reviewed synchronously though.
> 
> Originally the patches submitted in this patchset were a part of the series:
> Link: https://lore.kernel.org/linux-pci/20220503214638.1895-1-Sergey.Semin@baikalelectronics.ru/
> but due to the reviewers requests the series was expanded to about 30
> patches which made it too bulky for a comfortable review. So I decided to
> split it up into two patchsets: 2. and 3. in the table above.
> 
> Regarding the series content. This patchset is about adding new features
> to the DW PCIe core, Root Port and Endpoint drivers. First we suggest to
> add a more verbose link-up log message. Really printing link generation
> and width would be much more informative than just "link up". Then a
> series of IP-core version-related patches go, like using a native FourCC
> version representation, adding the IP-core auto-detection, adding a better
> structured IP-core version/type interface and finally dropping manual
> IP-core version setups from the platforms which are supposed to have it
> auto-detected. After that the platform-specific host de-initialization
> method is introduced. It's unused in the framework of this patchset but
> will be utilized in the next one (see the table above). A series of iATU
> optimizations, cleanups and new features goes afterwards. In particular we
> suggest to drop some redundant enumerations, add iATU regions size
> detection procedure and then use the regions parameters to verify the
> requested by the platform iATU ranges/dma-ranges settings. After that the
> dma-ranges property support is added for the DW PCIe Host controllers.
> 
> Link: https://lore.kernel.org/linux-pci/20220324013734.18234-1-Sergey.Semin@baikalelectronics.ru/
> Changelog v2:
> - Test the error condition first and return straight away if it comes true
>   in the link up waiting and link state logging method (@Joe).
> - Move the dw_pcie_region_type enumeration removal patch to being applied
>   before the IB/OB iATU windows setup simplification patch (@Rob).
> - Move the iATU region selection procedure into a helper function (@Rob).
> - Rebase from kernel v5.17 onto v5.18-rc3 since the later kernel has
>   already DT bindings converted. (@Rob)
> - Simplify the iATU region selection procedure by recalculating the base
>   address only if the space is unrolled. The iATU viewport base address
>   will be saved in the pci->atu_base field.
> - Move the IP-core version detection procedure call from
>   dw_pcie_ep_init_complete() to dw_pcie_ep_init().
> - Add a new patch: "PCI: dwc: Detect iATU settings after getting
>   "addr_space" resource."
> 
> Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@baikalelectronics.ru
> Changelog v3:

> - Fix pcie-tegra194-acpi.c driver to using the new macros names.
>   (@Manivannan)
> - Drop in/outbound iATU window size alignment constraint. (@Manivannan)
> - Detach this series of patches into a dedicated patchset.

@Mani, several patches have been changed or removed from the series
so I have to drop you tag from some of them. Could you please have
alook at the patchset one more time?

-Sergey

> - Rebase onto kernel v5.18.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>
> Cc: "Krzysztof Wilczyński" <kw@...ux.com>
> Cc: Frank Li <Frank.Li@....com>
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: linux-pci@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> 
> Serge Semin (15):
>   PCI: dwc: Add more verbose link-up message
>   PCI: dwc: Detect iATU settings after getting "addr_space" resource
>   PCI: dwc: Convert to using native IP-core versions representation
>   PCI: dwc: Add IP-core version detection procedure
>   PCI: dwc: Introduce Synopsys IP-core versions/types interface
>   PCI: intel-gw: Drop manual DW PCIe controller version setup
>   PCI: tegra194: Drop manual DW PCIe controller version setup
>   PCI: dwc: Add host de-initialization callback
>   PCI: dwc: Drop inbound iATU types enumeration - dw_pcie_as_type
>   PCI: dwc: Drop iATU regions enumeration - dw_pcie_region_type
>   PCI: dwc: Simplify in/outbound iATU setup methods
>   PCI: dwc: Add iATU regions size detection procedure
>   PCI: dwc: Verify in/out regions against iATU constraints
>   PCI: dwc: Check iATU in/outbound ranges setup methods status
>   PCI: dwc: Introduce dma-ranges property support for RC-host
> 
>  drivers/pci/controller/dwc/pci-keystone.c     |  12 +-
>  .../pci/controller/dwc/pcie-designware-ep.c   |  40 +-
>  .../pci/controller/dwc/pcie-designware-host.c | 202 +++++---
>  drivers/pci/controller/dwc/pcie-designware.c  | 461 ++++++++----------
>  drivers/pci/controller/dwc/pcie-designware.h  | 123 ++---
>  drivers/pci/controller/dwc/pcie-intel-gw.c    |  22 +-
>  .../pci/controller/dwc/pcie-tegra194-acpi.c   |   7 +-
>  drivers/pci/controller/dwc/pcie-tegra194.c    |   1 -
>  8 files changed, 461 insertions(+), 407 deletions(-)
> 
> -- 
> 2.35.1
> 

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