RE: [”PATCH” 0/5] Asynchronous linkdown recovery

From: Ben Peled
Date: Tue Apr 13 2021 - 06:14:42 EST


Hi all,
Please ignore this patch list there is a small change missing.

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From: bpeled@xxxxxxxxxxx <bpeled@xxxxxxxxxxx>
Sent: Monday, April 12, 2021 6:31 PM
To: thomas.petazzoni@xxxxxxxxxxx; lorenzo.pieralisi@xxxxxxx; bhelgaas@xxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; sebastian.hesselbarth@xxxxxxxxx; gregory.clement@xxxxxxxxxxx; andrew@xxxxxxx; robh+dt@xxxxxxxxxx; mw@xxxxxxxxxxxx; jaz@xxxxxxxxxxxx; Kostya Porotchkin <kostap@xxxxxxxxxxx>; Nadav Haklai <nadavh@xxxxxxxxxxx>; Stefan Chulski <stefanc@xxxxxxxxxxx>; Ofer Heifetz <oferh@xxxxxxxxxxx>; Ben Peled <bpeled@xxxxxxxxxxx>
Subject: [”PATCH” 0/5] Asynchronous linkdown recovery

From: Ben Peled <bpeled@xxxxxxxxxxx>

The following patches implement the required procedure to handle and recover from asynchronous PCIE link down events on Armada SoCs.

The procedure is defined as the following:
1) Prevent new access to the PCI-E I/F by disabling the LTSSM
2) Flush all pending transaction/access to the PCI-E I/F
3) HW reset the PCIE end point device (based on board support)
4) Reset the PCIE MAC
5) Reinitialize the PCIE root complex and enable the LTSSM

The execution of this procedure is triggered by the PCIE RST_LINK_DOWN interrupt

Ben Peled (5):
PCI: armada8k: Disable LTSSM on link down interrupts
PCI: armada8k: Add link-down handle
PCI: armada8k: add device reset to link-down handle
dt-bindings: pci: add system controller and MAC reset bit to
Armada 7K/8K controller bindings
arm64: dts: marvell: add pcie mac reset to pcie

Documentation/devicetree/bindings/pci/pci-armada8k.txt | 6 +
arch/arm64/boot/dts/marvell/armada-cp11x.dtsi | 7 ++
drivers/pci/controller/dwc/pcie-armada8k.c | 126 ++++++++++++++++++++
3 files changed, 139 insertions(+)

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2.7.4