From patchwork Mon Feb 15 12:16:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hector Martin X-Patchwork-Id: 12088037 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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 504C2C433E0 for ; Mon, 15 Feb 2021 12:19:29 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D926C64E34 for ; Mon, 15 Feb 2021 12:19:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D926C64E34 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=marcan.st Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=5Zc77tStHfR13xce9pdIp34DNvdGLAl6LhbLmWsBB+c=; b=os0ynicUqyMUkegJV3Ar7Jcknz KGMc0r8ZKdcodB2RZvXAPteu2OJG8pB+N9dzmyQ/gRd5nrWQo9vhzqZgsCrcdbwwAcJv2+51OxbTj bNCGoT+EYuVIxtRDXNF/6ze/clcmvTEtgV/w5qKQQckBq5qZmjWlMvlufDPdyq2Xqz7OJMMimdVFQ sLW5eDR3HyPKcHdePHzQtB5mHKV/34KPhE0ppOMrBWnfLZ8h8c7v/CMAOXY17MVlEs5WTkrkNkrUi L0EW2LM1xS8HVXnVMUb/0L3/mnqJSZbFGRsg5UElGVA+QAtRfklRQ7CCvC4JQGYxmvFUMK3/l6r70 HZbqImsA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lBcp2-00057X-H2; Mon, 15 Feb 2021 12:17:48 +0000 Received: from marcansoft.com ([2a01:298:fe:f::2] helo=mail.marcansoft.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lBcoz-00056f-3a for linux-arm-kernel@lists.infradead.org; Mon, 15 Feb 2021 12:17:46 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id A15B741E96; Mon, 15 Feb 2021 12:17:33 +0000 (UTC) From: Hector Martin To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 00/25] Apple M1 SoC platform bring-up Date: Mon, 15 Feb 2021 21:16:48 +0900 Message-Id: <20210215121713.57687-1-marcan@marcan.st> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210215_071745_400561_77F2C69A X-CRM114-Status: GOOD ( 26.29 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Arnd Bergmann , Rob Herring , Tony Lindgren , Marc Zyngier , Linus Walleij , Hector Martin , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , devicetree@vger.kernel.org, Alexander Graf , Olof Johansson , Mohamed Mediouni , Stan Skowronek , Will Deacon , Mark Kettenis Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series brings up initial support for the Apple M1 SoC, used in the 2020 Mac Mini, MacBook Pro, and MacBook Air models. The following features are supported in this initial port: - UART (samsung-style) with earlycon support - Interrupts, including affinity and IPIs (Apple Interrupt Controller) - SMP (through standard spin-table support) - simplefb-based framebuffer - Devicetree for the Mac Mini (should work for the others too at this stage) See below for an overview of changes since v1. == Patch overview == - 01-02 Core platform DT bindings - 03-04 CPU DT bindings and MIDR defines - 05-06 Add interrupt-names support to the ARM timer driver This is used to cleanly express the lack of a secure timer; platforms in the past have used various hacks like dummy IRQs here. - 07-09 FIQ support These platforms require FIQ support, as some interrupt sources are hard-wired to FIQ. We settled on always keeping the FIQ/IRQ mask state synced, and only redirecting the vectors using alternatives on these CPUs. Other platforms retain the existing panic-on-FIQ behavior. - 10-12 ioremap_np() (nGnRnE) support The fabric in these SoCs only supports nGnRnE accesses for standard MMIO, except for PCI ranges which use nGnRE. Linux currently defaults to the latter on ARM64, so this adds a new ioremap type and DT properties to automatically select it for drivers using OF and devm abstractions, under buses specified in DT. - 13-15 AIC (Apple Interrupt Controller) driver and support defines This also embeds FIQ handling for this platform. - 16 Introduce CONFIG_ARCH_APPLE & add it to defconfig - 17-23 Add Apple SoC support to the samsung_tty driver This includes several refactoring patches to be able to more cleanly introduce this, as well as a switch to devm_ioremap_resource to be able to use the nGnRnE support introduced above. Earlycon support is included with a special-case nGnRnE hack, as earlycon is too early to use the generic infrastructure. - 24 simple-framebuffer bindings for Apple (trivial) - 25 Add the initial M1 Mac Mini (j274) devicetree == About the hardware == These machines officially support booting unsigned/user-provided XNU-like kernels, with a very different boot protocol and devicetree format. We are developing an initial bootloader, m1n1 [1], to take care of as many hardware peculiarities as possible and present a standard Linux arm64 boot protocol and device tree. In the future, I expect that production setups will add U-Boot and perhaps GRUB into the boot chain, to make the boot process similar to other ARM64 platforms. The machines expose their debug UART over USB Type C, triggered with vendor-specific USB-PD commands. Currently, the easiest way to get a serial console on these machines is to use a second M1 box and a simple USB C cable [2]. You can also build a DIY interface using an Arduino, a FUSB302 chip or board, and a 1.2V UART-TTL adapter [3]. In the coming weeks we will be designing an open hardware project to provide serial/debug connectivity to these machines (and, hopefully, also support other UART-over-Type C setups from other vendors). Please contact me privately if you are interested in getting an early prototype version of one of these devices. A quickstart guide to booting Linux kernels on these machines is available at [4], and we are documenting the hardware at [5]. [1] https://github.com/AsahiLinux/m1n1/ [2] https://github.com/AsahiLinux/macvdmtool/ [3] https://github.com/AsahiLinux/vdmtool/ [4] https://github.com/AsahiLinux/docs/wiki/Developer-Quickstart [5] https://github.com/AsahiLinux/docs/wiki == 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 freenode to chat with us, or check our website for more information on the project: https://asahilinux.org/ == Changes since v1 == * DT vendor prefix AAPL -> apple * Added interrupt-names support to the ARMv8 timer driver, to better represent the lack of secure timer * Added sysreg_apple.h to define Apple vendor specific CPU system registers * No longer gating the DAIF.F bit handling via alternatives; now we always keep it in sync with DAIF.I on all platforms. * ARCH_APPLE selects APPLE_AIC * Fixed copyright of DT (GPL-2.0+ OR MIT) * Made all the copyright lines for new files `Copyright The Asahi Linux Contributors` * Split DT into apple-m1.dtsi and apple-j274.dts * Cleaner solution for FIQ alternatives in entry.S from Marc * Implemented proper nGnRnE solution using the `[non]posted-mmio` DT properties and ioremap_np() * Added (tentative) support for guest timer FIQs in AIC * Added masked initialization and basic fallback handling for other FIQs * Reworked AIC to not use chained IRQ domains, and split up FIQ irqchip * More refactoring of the samsung_tty driver to cleanly introduce Apple support * Fixed many style issues, bugs, and other nits Note: this keeps the `apple,arm-platform` compatible, which is now used to gate the OF nonposted-mmio logic to Apple platforms only. Hector Martin (24): dt-bindings: vendor-prefixes: Add apple prefix dt-bindings: arm: apple: Add bindings for Apple ARM platforms dt-bindings: arm: cpus: Add apple,firestorm & icestorm compatibles arm64: cputype: Add CPU implementor & types for the Apple M1 cores dt-bindings: timer: arm,arch_timer: Add interrupt-names support arm64: arch_timer: implement support for interrupt-names arm64: cpufeature: Add a feature for FIQ support arm64: Always keep DAIF.[IF] in sync asm-generic/io.h: Add a non-posted variant of ioremap() arm64: Implement ioremap_np() to map MMIO as nGnRnE of/address: Add infrastructure to declare MMIO as non-posted arm64: Add Apple vendor-specific system registers dt-bindings: interrupt-controller: Add DT bindings for apple-aic irqchip/apple-aic: Add support for the Apple Interrupt Controller arm64: Kconfig: Introduce CONFIG_ARCH_APPLE tty: serial: samsung_tty: Separate S3C64XX ops structure tty: serial: samsung_tty: add s3c24xx_port_type tty: serial: samsung_tty: IRQ rework tty: serial: samsung_tty: Use devm_ioremap_resource dt-bindings: serial: samsung: Add apple,s5l-uart compatible tty: serial: samsung_tty: Add support for Apple UARTs tty: serial: samsung_tty: Add earlycon support for Apple UARTs dt-bindings: display: Add apple,simple-framebuffer arm64: apple: Add initial Mac Mini 2020 (M1) devicetree Marc Zyngier (1): arm64: entry: Map the FIQ vector to IRQ on NEEDS_FIQ platforms .../devicetree/bindings/arm/apple.yaml | 36 + .../devicetree/bindings/arm/cpus.yaml | 2 + .../bindings/display/simple-framebuffer.yaml | 5 + .../interrupt-controller/apple,aic.yaml | 88 +++ .../bindings/serial/samsung_uart.yaml | 4 +- .../bindings/timer/arm,arch_timer.yaml | 14 + .../devicetree/bindings/vendor-prefixes.yaml | 2 + MAINTAINERS | 15 + arch/arm64/Kconfig | 11 + arch/arm64/Kconfig.platforms | 8 + arch/arm64/boot/dts/Makefile | 1 + arch/arm64/boot/dts/apple/Makefile | 2 + arch/arm64/boot/dts/apple/apple-j274.dts | 41 ++ arch/arm64/boot/dts/apple/apple-m1.dtsi | 124 ++++ arch/arm64/configs/defconfig | 1 + arch/arm64/include/asm/assembler.h | 6 +- arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/cputype.h | 6 + arch/arm64/include/asm/daifflags.h | 4 +- arch/arm64/include/asm/io.h | 1 + arch/arm64/include/asm/irqflags.h | 19 +- arch/arm64/include/asm/sysreg_apple.h | 69 ++ arch/arm64/kernel/cpufeature.c | 14 + arch/arm64/kernel/entry.S | 27 +- drivers/clocksource/arm_arch_timer.c | 25 +- drivers/irqchip/Kconfig | 10 + drivers/irqchip/Makefile | 1 + drivers/irqchip/irq-apple-aic.c | 647 ++++++++++++++++++ drivers/of/address.c | 72 +- drivers/tty/serial/Kconfig | 2 +- drivers/tty/serial/samsung_tty.c | 499 +++++++++++--- include/asm-generic/io.h | 8 +- include/clocksource/arm_arch_timer.h | 1 + .../interrupt-controller/apple-aic.h | 15 + include/linux/cpuhotplug.h | 1 + include/linux/io.h | 2 + include/linux/ioport.h | 1 + include/linux/of_address.h | 1 + include/linux/serial_s3c.h | 16 + lib/devres.c | 22 + 40 files changed, 1685 insertions(+), 141 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/apple.yaml create mode 100644 Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml create mode 100644 arch/arm64/boot/dts/apple/Makefile create mode 100644 arch/arm64/boot/dts/apple/apple-j274.dts create mode 100644 arch/arm64/boot/dts/apple/apple-m1.dtsi create mode 100644 arch/arm64/include/asm/sysreg_apple.h create mode 100644 drivers/irqchip/irq-apple-aic.c create mode 100644 include/dt-bindings/interrupt-controller/apple-aic.h --- 2.30.0