linux-kernel - [PATCH v3 00/10] PCI: Add support for Apple M1

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Message-Id: <20210913182550.264165-1-maz@kernel.org>
Date:   Mon, 13 Sep 2021 19:25:40 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Stan Skowronek <stan@...ellium.com>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Sven Peter <sven@...npeter.dev>,
        Hector Martin <marcan@...can.st>,
        Robin Murphy <Robin.Murphy@....com>, kernel-team@...roid.com
Subject: [PATCH v3 00/10] PCI: Add support for Apple M1

I have resumed my earlier effort to bring the Apple-M1 into the world
of living by equipping it with a PCIe controller driver. Huge thanks
to Alyssa Rosenzweig for kicking it into shape and providing the first
two versions of this series.

Much has changed since v2[2]. Mark Kettenis is doing a great job with
the binding [0], so I have dropped that from the series, and strictly
focused on the Linux side of thing. I am now using this binding as is,
with the exception of a single line change, which I believe is a fix
[1].

Supporting the per-port interrupt controller has brought in a couple
of fixes for the core DT code.  Also, some work has gone into dealing
with excluding the MSI page from the IOVA range, as well as
programming the RID-to-SID mapper.

Overall, the driver is now much cleaner and most probably feature
complete when it comes to supporting internal devices (although I
haven't investigated things like power management). TB support is
another story, and will require some more hacking.

This of course still depends on the clock and pinctrl drivers that are
otherwise in flight, and will affect this driver one way or another.
I have pushed a branch with all the dependencies (and more) at [3].

* From v2 [2]:
  - Refactor DT parsing to match the new version of the binding
  - Add support for INTx and port-private interrupts
  - Signal link-up/down using interrupts
  - Export of_phandle_args_to_fwspec
  - Fix generic parsing of interrupt map
  - Rationalise port setup (data structure, self discovery)
  - Tell DART to exclude MSI doorbell from the IOVA mappings
  - Get rid of the setup bypass if the link was found up on boot
  - Prevent the module from being removed
  - Program the RID-to-SID mapper on device discovery
  - Rebased on 5.15-rc1

[0] https://lore.kernel.org/r/20210827171534.62380-1-mark.kettenis@xs4all.nl
[1] https://lore.kernel.org/r/871r5tcwhp.wl-maz@kernel.org
[2] https://lore.kernel.org/r/20210816031621.240268-1-alyssa@rosenzweig.io
[3] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=hack/m1-pcie-v3

Alyssa Rosenzweig (2):
  PCI: apple: Add initial hardware bring-up
  PCI: apple: Set up reference clocks when probing

Marc Zyngier (8):
  irqdomain: Make of_phandle_args_to_fwspec generally available
  of/irq: Allow matching of an interrupt-map local to an interrupt
    controller
  PCI: of: Allow matching of an interrupt-map local to a pci device
  PCI: apple: Add INTx and per-port interrupt support
  arm64: apple: t8103: Add root port interrupt routing
  PCI: apple: Implement MSI support
  iommu/dart: Exclude MSI doorbell from PCIe device IOVA range
  PCI: apple: Configure RID to SID mapper on device addition

 MAINTAINERS                          |   7 +
 arch/arm64/boot/dts/apple/t8103.dtsi |  33 +-
 drivers/iommu/apple-dart.c           |  25 +
 drivers/of/irq.c                     |  17 +-
 drivers/pci/controller/Kconfig       |  17 +
 drivers/pci/controller/Makefile      |   1 +
 drivers/pci/controller/pcie-apple.c  | 818 +++++++++++++++++++++++++++
 drivers/pci/of.c                     |  10 +-
 include/linux/irqdomain.h            |   4 +
 kernel/irq/irqdomain.c               |   6 +-
 10 files changed, 925 insertions(+), 13 deletions(-)
 create mode 100644 drivers/pci/controller/pcie-apple.c

-- 
2.30.2