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* [PATCH 0/3] pci: add support for firmware initialized designware RCs
@ 2017-08-21 19:29 Ard Biesheuvel
  2017-08-21 19:29 ` [PATCH 1/3] pci: designware: add driver for DWC controller in ECAM shift mode Ard Biesheuvel
                   ` (3 more replies)
  0 siblings, 4 replies; 21+ messages in thread
From: Ard Biesheuvel @ 2017-08-21 19:29 UTC (permalink / raw)
  To: linux-pci
  Cc: Joao Pinto, Graeme Gregory, Ard Biesheuvel, Marc Zyngier,
	Jingoo Han, Leif Lindholm, Bjorn Helgaas, linux-arm-kernel

UEFI based systems incorporating a Synopsys Designware PCIe controller
in RC mode will typically configure it before entering the OS. If this
configuration is fully static and ECAM compliant, there is no need to
expose particulars of the device to the OS, and we can simply describe
it as "pci-host-ecam-generic".

However, the Synopsys IP may be synthesized in a way where a quirk is
needed for config space accesses to the first bus. It makes little sense
to instantiate yet another pcie-designware driver that contains all the
low level setup code, but it is also not justified to add quirks handling
to the generic ECAM driver.

So instead, create a variant of the generic ECAM driver that filters config
space accesses directed at device #1 and up on the first bus.

Also, add a binding and driver to support the MSI functionality available
in some versions of this IP. This allows the MSI routing to be described
at the DT level rather than hardcoding it in the driver.

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Graeme Gregory <graeme.gregory@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>

Ard Biesheuvel (3):
  pci: designware: add driver for DWC controller in ECAM shift mode
  pci: designware: add separate driver for the MSI part of the RC
  dt-bindings: designware: add binding for Designware PCIe in ECAM mode

 Documentation/devicetree/bindings/pci/designware-pcie-ecam.txt |  56 +++++
 drivers/pci/dwc/Kconfig                                        |  11 +
 drivers/pci/dwc/Makefile                                       |   4 +-
 drivers/pci/dwc/pcie-designware-ecam.c                         |  75 ++++++
 drivers/pci/dwc/pcie-designware-msi.c                          | 255 ++++++++++++++++++++
 5 files changed, 400 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/pci/designware-pcie-ecam.txt
 create mode 100644 drivers/pci/dwc/pcie-designware-ecam.c
 create mode 100644 drivers/pci/dwc/pcie-designware-msi.c

-- 
2.11.0


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^ permalink raw reply	[flat|nested] 21+ messages in thread

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Thread overview: 21+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-08-21 19:29 [PATCH 0/3] pci: add support for firmware initialized designware RCs Ard Biesheuvel
2017-08-21 19:29 ` [PATCH 1/3] pci: designware: add driver for DWC controller in ECAM shift mode Ard Biesheuvel
2017-08-24 16:24   ` kbuild test robot
2017-08-24 16:25   ` kbuild test robot
2017-08-21 19:29 ` [PATCH 2/3] pci: designware: add separate driver for the MSI part of the RC Ard Biesheuvel
2017-08-24 16:42   ` Bjorn Helgaas
2017-08-24 16:43     ` Ard Biesheuvel
2017-08-24 16:48   ` Robin Murphy
2017-08-24 16:50     ` Ard Biesheuvel
2020-02-15  0:54   ` Alan Mikhak
2020-02-15  9:35     ` Ard Biesheuvel
2020-02-15 10:36       ` Marc Zyngier
2020-02-18 19:09         ` Alan Mikhak
2020-02-19  8:11           ` Marc Zyngier
2020-02-19  8:17             ` Ard Biesheuvel
2020-02-19 20:24               ` Alan Mikhak
2020-02-19 21:06                 ` Ard Biesheuvel
2020-02-19 21:35                   ` Alan Mikhak
2017-08-21 19:29 ` [PATCH 3/3] dt-bindings: designware: add binding for Designware PCIe in ECAM mode Ard Biesheuvel
2017-08-24 16:46 ` [PATCH 0/3] pci: add support for firmware initialized designware RCs Bjorn Helgaas
2017-08-31 19:21   ` Ard Biesheuvel

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