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

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Message-Id: <20240401-pci-epf-rework-v2-0-970dbe90b99d@linaro.org>
Date: Mon, 01 Apr 2024 21:20:26 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: 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>
Cc: 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, Niklas Cassel <cassel@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v2 00/10] PCI: endpoint: Make host reboot handling more
 robust

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

[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/

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>