linux-kernel - Re: [PATCH v2 00/10] PCI: endpoint: Make host reboot handling more robust

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Date: Wed, 3 Apr 2024 19:18:25 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Niklas Cassel <cassel@...nel.org>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Jingoo Han <jingoohan1@...il.com>, linux-pci@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	mhi@...ts.linux.dev, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v2 00/10] PCI: endpoint: Make host reboot handling more
 robust

On Tue, Apr 02, 2024 at 11:41:00AM +0200, Niklas Cassel wrote:
> On Mon, Apr 01, 2024 at 09:20:26PM +0530, Manivannan Sadhasivam wrote:
> > Hello,
> > 
> > This is the follow up series of [1], to improve the handling of host reboot in
> > the endpoint subsystem. This involves refining the PERST# and Link Down event
> > handling in both the controller and function drivers.
> > 
> > Testing
> > =======
> > 
> > This series is tested on Qcom SM8450 based development board with both MHI_EPF
> > and EPF_TEST function drivers.
> > 
> > Dependency
> > ==========
> > 
> > This series depends on [1] and [2].
> > 
> > - Mani
> 
> Hello Mani,
> 
> > [1] https://lore.kernel.org/linux-pci/20240314-pci-dbi-rework-v10-0-14a45c5a938e@linaro.org/
> > [2] https://lore.kernel.org/linux-pci/20240320113157.322695-1-cassel@kernel.org/
> 
> AFAICT both these series [1] (DBI rework v12, not v10) and [2] are fully
> reviewed and seem to be ready to go.
> 
> Considering that we have patches depending on [1] and [2],
> namely the series in $subject, but also:
> https://lore.kernel.org/linux-pci/20240330041928.1555578-1-dlemoal@kernel.org/T/#t
> 
> I think it would be a good idea if you could apply [1] and [2] to the
> pci/endpoint branch.
> 

Unfortunately, I cannot merge the patches outside 'pci/endpoint' even though
these are related to the PCI Endpoint subsystem. But I have delegated these 2
series to Krzysztof, so hopefully he'll apply it soon.

- Mani

> (It is not easy for people to know that they will need to rebase their work on
> these (fully reviewed) series, when they have not been applied.)
> 
> 
> Kind regards,
> Niklas
> 
> 
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> > Changes in v2:
> > - Dropped the {start/stop}_link rework patches
> > - Incorporated comments from Niklas
> > - Collected review tags
> > - Rebased on top of v6.9-rc1 and https://lore.kernel.org/linux-pci/20240320113157.322695-1-cassel@kernel.org/
> > - Link to v1: https://lore.kernel.org/r/20240314-pci-epf-rework-v1-0-6134e6c1d491@linaro.org
> > 
> > ---
> > Manivannan Sadhasivam (10):
> >       PCI: qcom-ep: Disable resources unconditionally during PERST# assert
> >       PCI: endpoint: Decouple EPC and PCIe bus specific events
> >       PCI: endpoint: Rename core_init() callback in 'struct pci_epc_event_ops' to init()
> >       PCI: epf-test: Refactor pci_epf_test_unbind() function
> >       PCI: epf-{mhi/test}: Move DMA initialization to EPC init callback
> >       PCI: endpoint: Introduce EPC 'deinit' event and notify the EPF drivers
> >       PCI: dwc: ep: Add a generic dw_pcie_ep_linkdown() API to handle Link Down event
> >       PCI: qcom-ep: Use the generic dw_pcie_ep_linkdown() API to handle Link Down event
> >       PCI: epf-test: Handle Link Down event
> >       PCI: qcom: Implement shutdown() callback to properly reset the endpoint devices
> > 
> >  drivers/pci/controller/dwc/pcie-designware-ep.c |  99 ++++++++++++++---------
> >  drivers/pci/controller/dwc/pcie-designware.h    |   5 ++
> >  drivers/pci/controller/dwc/pcie-qcom-ep.c       |   9 +--
> >  drivers/pci/controller/dwc/pcie-qcom.c          |   8 ++
> >  drivers/pci/controller/dwc/pcie-tegra194.c      |   1 +
> >  drivers/pci/endpoint/functions/pci-epf-mhi.c    |  47 ++++++++---
> >  drivers/pci/endpoint/functions/pci-epf-test.c   | 103 +++++++++++++++++-------
> >  drivers/pci/endpoint/pci-epc-core.c             |  53 ++++++++----
> >  include/linux/pci-epc.h                         |   1 +
> >  include/linux/pci-epf.h                         |  27 +++++--
> >  10 files changed, 248 insertions(+), 105 deletions(-)
> > ---
> > base-commit: e6377605ca734126533a0f8e4de2b4bac881f076
> > change-id: 20240314-pci-epf-rework-a6e65b103a79
> > 
> > Best regards,
> > -- 
> > Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > 

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