linux-kernel - Re: [PATCH V5 0/3] PCI: designware-ep: Fix DBI access before core init

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Date:   Tue, 7 Mar 2023 20:48:39 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     Manivannan Sadhasivam <mani@...nel.org>, jingoohan1@...il.com,
        gustavo.pimentel@...opsys.com, lpieralisi@...nel.org,
        robh@...nel.org, kw@...ux.com, bhelgaas@...gle.com,
        Sergey.Semin@...kalelectronics.ru, dmitry.baryshkov@...aro.org,
        linmq006@...il.com, ffclaire1224@...il.com,
        thierry.reding@...il.com, jonathanh@...dia.com,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, kthota@...dia.com,
        mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V5 0/3] PCI: designware-ep: Fix DBI access before core
 init

On Tue, Feb 14, 2023 at 07:27:54PM +0530, Vidya Sagar wrote:
> 
> 
> On 2/14/2023 6:33 PM, Manivannan Sadhasivam wrote:
> > External email: Use caution opening links or attachments
> > 
> > 
> > On Thu, Oct 13, 2022 at 11:27:09PM +0530, Vidya Sagar wrote:
> > > This series attempts to fix the issue with core register (Ex:- DBI) accesses
> > > causing system hang issues in platforms where there is a dependency on the
> > > availability of PCIe Reference clock from the host for their core
> > > initialization.
> > > This series is verified on Tegra194 & Tegra234 platforms.
> > > 
> > > Manivannan, could you please verify on qcom platforms?
> > > 
> > 
> > Vidya, any plan to respin this series? The EPC rework series is now merged for
> > v6.3.
> 
> Yes. I'll send an updated series soon.
> Currently, I'm observing some regression with linux-next on Tegra platform
> for endpoint mode. I'll post the patches as soon as that is resolved.
> 

Ping!

Thanks,
Mani

> Thanks,
> Vidya Sagar
> 
> > 
> > Thanks,
> > Mani
> > 
> > > V5:
> > > * Addressed review comments from Bjorn
> > > * Changed dw_pcie_ep_init_complete() to dw_pcie_ep_init_late()
> > > * Skipped memory allocation if done already. This is to avoid freeing and then
> > >    allocating again during PERST# toggles from the host.
> > > 
> > > V4:
> > > * Addressed review comments from Bjorn and Manivannan
> > > * Added .ep_init_late() ops
> > > * Added patches to refactor code in qcom and tegra platforms
> > > 
> > > Vidya Sagar (3):
> > >    PCI: designware-ep: Fix DBI access before core init
> > >    PCI: qcom-ep: Refactor EP initialization completion
> > >    PCI: tegra194: Refactor EP initialization completion
> > > 
> > >   .../pci/controller/dwc/pcie-designware-ep.c   | 125 +++++++++++-------
> > >   drivers/pci/controller/dwc/pcie-designware.h  |  10 +-
> > >   drivers/pci/controller/dwc/pcie-qcom-ep.c     |  27 ++--
> > >   drivers/pci/controller/dwc/pcie-tegra194.c    |   4 +-
> > >   4 files changed, 97 insertions(+), 69 deletions(-)
> > > 
> > > --
> > > 2.17.1
> > > 
> > 
> > --
> > மணிவண்ணன் சதாசிவம்

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