From patchwork Mon Aug 16 03:16:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alyssa Rosenzweig X-Patchwork-Id: 497759 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBDE9C4338F for ; Mon, 16 Aug 2021 03:16:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AE97D6152A for ; Mon, 16 Aug 2021 03:16:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230186AbhHPDRP (ORCPT ); Sun, 15 Aug 2021 23:17:15 -0400 Received: from [138.197.143.207] ([138.197.143.207]:45154 "EHLO rosenzweig.io" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S229663AbhHPDRO (ORCPT ); Sun, 15 Aug 2021 23:17:14 -0400 From: Alyssa Rosenzweig To: linux-pci@vger.kernel.org Cc: Bjorn Helgaas , Rob Herring , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Alyssa Rosenzweig , Stan Skowronek , Marc Zyngier , Mark Kettenis , Sven Peter , Hector Martin , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/6] Add PCI driver for the Apple M1 Date: Sun, 15 Aug 2021 23:16:15 -0400 Message-Id: <20210816031621.240268-1-alyssa@rosenzweig.io> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This adds a PCIe driver for the internal bus on the Apple M1 (and presumably other Apple system-on-chips). It's based on the work of Marc Zyngier, Mark Kettenis, and Stan Skowronek (Corellium). In conjunction with a pinctrl driver, this enables the USB type-A ports and the Ethernet port. It also paves the way for Wi-Fi and Bluetooth, but that requires further work. For the largest change since v1 of the series-- this now uses Mark Kettenis's device tree bindings for PCIe. This series contains Mark's patches (currently under discussion on the LKML) adding the device tree nodes required for PCIe. I have made minor modifications to Mark's original patches to get everything working under Linux: * In the bindings themselves, I've increased the maximum number of interrupts to accommodate the full set. * In the PCIe node, I've added the full set of interrupts. * I've added the PCIe DART nodes (IOMMUs) and the corresponding iommu-map(-mask) properties already covered in the bindings. * I've tweaked the sizes of the `reg` blocks. Otherwise I got a page fault early on. I've collected the patches required to test on this branch: https://github.com/mu-one/linux/commits/pcie-v2 This branch is based on linux-next and contains a GPIO (pinctrl) driver, a clock gate driver, additional device tree nodes, and this series. The type-A ports and Ethernet should work out-of-the-box on that tree, provided the kernel is booted through m1n1. This improves on Maz's initial PCIe driver, which required U-Boot to function. I've started using Linux on M1 as my workstation for Panfrost development, so this should have 40 hours of testing by this time next week. == Project Blurb == Asahi Linux is an open community project dedicated to developing and maintaining mainline support for Apple Silicon on Linux. Feel free to drop by #asahi and #asahi-dev on OFTC to chat with us, or check our website for more information on the project: == Changes == Changes for v2: - Cherrypicked Mark's device tree bindings and switched to using them. - Split up the PCI driver patch into 3. - Large numbers of minor changes to the driver better match upstream quality standards (using more helper functions, etc.) Alyssa Rosenzweig (3): PCI: apple: Add initial hardware bring-up PCI: apple: Set up reference clocks when probing PCI: apple: Add MSI handling Mark Kettenis (3): dt-bindings: pci: Add DT bindings for apple,pcie arm64: apple: Add pinctrl nodes arm64: apple: Add PCIe node .../devicetree/bindings/pci/apple,pcie.yaml | 166 +++++++ MAINTAINERS | 7 + arch/arm64/boot/dts/apple/t8103.dtsi | 207 ++++++++ drivers/pci/controller/Kconfig | 12 + drivers/pci/controller/Makefile | 1 + drivers/pci/controller/pcie-apple.c | 448 ++++++++++++++++++ 6 files changed, 841 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/apple,pcie.yaml create mode 100644 drivers/pci/controller/pcie-apple.c