From patchwork Sun Mar 31 03:15:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878663 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D2D8A15AC for ; Sun, 31 Mar 2019 03:16:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BF42F2883F for ; Sun, 31 Mar 2019 03:16:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B342028923; Sun, 31 Mar 2019 03:16:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E1CFB2883F for ; Sun, 31 Mar 2019 03:15:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=pTwAnI8mG0xKXYTi1FIzE30DJL/5UIBVhqmsHf5wYxI=; b=cfWiw/KCu5Tqj2 bKDjs7MrMHea3JK/3399KtyzeJhKPADsiqQgVmCzvG7/vur8His1u7xIswO8AuJqXwHuTgZGl+pkL OflKOXz4N+VeAX3yfVvIVi6DDlZkrIZ4BAe40uru4TLcgx96Y3Nzhf0J//1lnBI+trFce6J0oCwgE 7c+9jfDTEfjbtwVWIx61nCvEPTLnhkFx19IFG08ZYzSEUg9WpOIee2R/hp/Gb6NU+epbJ7xQSIh18 HaqREdI4oa6BgdLo8unfyfVQHTy/2c3MIg3PAG/PQpqMGmpUG44XX8X1Q3HPGCuV7YCkRf+pxav8o 8erDM35JWOhQAOzfQ7gw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwn-0003qM-6x; Sun, 31 Mar 2019 03:15:49 +0000 Received: from mail.nic.cz ([2001:1488:800:400::400]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwi-0003o8-Nv for linux-arm-kernel@lists.infradead.org; Sun, 31 Mar 2019 03:15:46 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id EE1DE63521; Sun, 31 Mar 2019 05:15:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=B/TpvfHvTFNpjJx5rPCicAY3K4ayOqi1nl+RinKdt/c=; h=From:To:Date; b=qBvMAxNwiyTXYOSuGx4V+2qFuDjYwBt78d+vApTKcq1ZuFZVzuXlsqdl5XiOKw/8y T2+xcyVRHgyzyeIx5YssXi7Tngq7BpFbWEQcWDQGzEA7Gsrae4v/0647fx0q7Ybj5t W8bX/9WERKph68kpwDKmkBJWbHuT4HervFLRSYg8= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 1/6] dt-bindings: mailbox: Document armada-3700-rwtm-mailbox binding Date: Sun, 31 Mar 2019 05:15:32 +0200 Message-Id: <20190331031537.10626-2-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201545_078526_6CACBF90 X-CRM114-Status: UNSURE ( 9.95 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds device tree binding documentation for the rWTM BIU mailbox driver on the Armada 37xx SOC (EspressoBin, Turris Mox). Signed-off-by: Marek Behún Reviewed-by: Rob Herring --- .../mailbox/marvell,armada-3700-rwtm-mailbox.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/marvell,armada-3700-rwtm-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/marvell,armada-3700-rwtm-mailbox.txt b/Documentation/devicetree/bindings/mailbox/marvell,armada-3700-rwtm-mailbox.txt new file mode 100644 index 000000000000..282ab81a4ea6 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/marvell,armada-3700-rwtm-mailbox.txt @@ -0,0 +1,16 @@ +* rWTM BIU Mailbox driver for Armada 37xx + +Required properties: +- compatible: must be "marvell,armada-3700-rwtm-mailbox" +- reg: physical base address of the mailbox and length of memory mapped + region +- interrupts: the IRQ line for the mailbox +- #mbox-cells: must be 1 + +Example: + rwtm: mailbox@b0000 { + compatible = "marvell,armada-3700-rwtm-mailbox"; + reg = <0xb0000 0x100>; + interrupts = ; + #mbox-cells = <1>; + }; From patchwork Sun Mar 31 03:15:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878681 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BBC48922 for ; Sun, 31 Mar 2019 03:16:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A745D2883F for ; Sun, 31 Mar 2019 03:16:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9AF522891F; Sun, 31 Mar 2019 03:16:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C336628917 for ; Sun, 31 Mar 2019 03:16:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=tMc8WmOOPALjoZHw+tLWTjyNCUd7157sX4gO1pXodq4=; b=bn8uVKNZXMlQ78 Vb42RQN4Haic2Rlw6yAMWIl8dIQWe3rwPo9oYPGSItWk8KE0V+tUi0Howw/tpnEoZE0v2ZMYdOfJ3 poItfCve/B9fJHOMktNQej0+C31i7J6zzoyG6JAVGO0fCPAittnE1OGXyQR4xZgTuTME0YT12SkQQ i7qg3wN9TAhzXciC9bGxYdnik5zL91uENZYzL4wwLbsy7GX4neEFZuW7pMq5hYzuxzg5IkA+Ogn67 kQZtYCxRCSc7wkBTfnBl6KP7ByrDKzbBjwlhRR7XWARWEu0X0V74X61X83aIZ72W6CkbMUDD0r55V T721SOYAjzJV6q5HZQ1A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQxb-0004py-Mr; Sun, 31 Mar 2019 03:16:39 +0000 Received: from mail.nic.cz ([217.31.204.67]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwi-0003o7-LP for linux-arm-kernel@lists.infradead.org; Sun, 31 Mar 2019 03:15:48 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 0B133635B6; Sun, 31 Mar 2019 05:15:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=rMA7FDsFAXZRV3uzVRbcuoU0H/z8u9pHphliha3N23c=; h=From:To:Date; b=HAg6mY11t7PwBTBy1uX5S+HJPzC/OenLwKRE/WQhu/kowx8byWMQJJZ5tqAkOsahs kyUBvBncgTAATYH7EUEugcPLXyZN09iTAFx8kjXtL9BXKodQ1Ekgf0w5EzGTNQpden 6YVsBSqvT1tAYuDptC6eY7H+2o3vtkgq0ddwHOPs= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 2/6] mailbox: Add support for Armada 37xx rWTM mailbox Date: Sun, 31 Mar 2019 05:15:33 +0200 Message-Id: <20190331031537.10626-3-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201545_079370_6F6EAE20 X-CRM114-Status: GOOD ( 17.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds support for the mailbox via which the kernel can communicate with the firmware running on the secure processor of the Armada 37xx SOC. The rWTM secure processor has access to internal eFuses and cryptographic circuits, such as the Entropy Bit Generator to generate true random numbers. Signed-off-by: Marek Behún --- drivers/mailbox/Kconfig | 10 + drivers/mailbox/Makefile | 2 + drivers/mailbox/armada-37xx-rwtm-mailbox.c | 225 +++++++++++++++++++++ include/linux/armada-37xx-rwtm-mailbox.h | 23 +++ 4 files changed, 260 insertions(+) create mode 100644 drivers/mailbox/armada-37xx-rwtm-mailbox.c create mode 100644 include/linux/armada-37xx-rwtm-mailbox.h diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig index d86e7a4ac04d..595542bfae85 100644 --- a/drivers/mailbox/Kconfig +++ b/drivers/mailbox/Kconfig @@ -41,6 +41,16 @@ config PL320_MBOX Management Engine, primarily for cpufreq. Say Y here if you want to use the PL320 IPCM support. +config ARMADA_37XX_RWTM_MBOX + tristate "Armada 37xx rWTM BIU Mailbox" + depends on ARCH_MVEBU || COMPILE_TEST + depends on OF + help + Mailbox implementation for communication with the the firmware + running on the Cortex-M3 rWTM secure processor of the Armada 37xx + SOC. Say Y here if you are building for such a device (for example + the Turris Mox router). + config OMAP2PLUS_MBOX tristate "OMAP2+ Mailbox framework support" depends on ARCH_OMAP2PLUS diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 8be3bcbcf882..c22fad6f696b 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -9,6 +9,8 @@ obj-$(CONFIG_ARM_MHU) += arm_mhu.o obj-$(CONFIG_IMX_MBOX) += imx-mailbox.o +obj-$(CONFIG_ARMADA_37XX_RWTM_MBOX) += armada-37xx-rwtm-mailbox.o + obj-$(CONFIG_PLATFORM_MHU) += platform_mhu.o obj-$(CONFIG_PL320_MBOX) += pl320-ipc.o diff --git a/drivers/mailbox/armada-37xx-rwtm-mailbox.c b/drivers/mailbox/armada-37xx-rwtm-mailbox.c new file mode 100644 index 000000000000..97f90e97a83c --- /dev/null +++ b/drivers/mailbox/armada-37xx-rwtm-mailbox.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * rWTM BIU Mailbox driver for Armada 37xx + * + * Author: Marek Behun + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "armada-37xx-rwtm-mailbox" + +/* relative to rWTM BIU Mailbox Registers */ +#define RWTM_MBOX_PARAM(i) (0x0 + ((i) << 2)) +#define RWTM_MBOX_COMMAND 0x40 +#define RWTM_MBOX_RETURN_STATUS 0x80 +#define RWTM_MBOX_STATUS(i) (0x84 + ((i) << 2)) +#define RWTM_MBOX_FIFO_STATUS 0xc4 +#define FIFO_STS_RDY 0x100 +#define FIFO_STS_CNTR_MASK 0x7 +#define FIFO_STS_CNTR_MAX 4 + +#define RWTM_HOST_INT_RESET 0xc8 +#define RWTM_HOST_INT_MASK 0xcc +#define SP_CMD_COMPLETE BIT(0) +#define SP_CMD_QUEUE_FULL_ACCESS BIT(17) +#define SP_CMD_QUEUE_FULL BIT(18) + +struct a37xx_mbox { + struct device *dev; + struct mbox_controller controller; + void __iomem *base; + int irq; +}; + +static void a37xx_mbox_receive(struct mbox_chan *chan) +{ + struct a37xx_mbox *mbox = chan->con_priv; + struct armada_37xx_rwtm_rx_msg rx_msg; + int i; + + rx_msg.retval = readl(mbox->base + RWTM_MBOX_RETURN_STATUS); + for (i = 0; i < 16; ++i) + rx_msg.status[i] = readl(mbox->base + RWTM_MBOX_STATUS(i)); + + mbox_chan_received_data(chan, &rx_msg); +} + +static irqreturn_t a37xx_mbox_irq_handler(int irq, void *data) +{ + struct mbox_chan *chan = data; + struct a37xx_mbox *mbox = chan->con_priv; + u32 reg; + + reg = readl(mbox->base + RWTM_HOST_INT_RESET); + + if (reg & SP_CMD_COMPLETE) + a37xx_mbox_receive(chan); + + if (reg & (SP_CMD_QUEUE_FULL_ACCESS | SP_CMD_QUEUE_FULL)) + dev_err(mbox->dev, "Secure processor command queue full\n"); + + writel(reg, mbox->base + RWTM_HOST_INT_RESET); + if (reg) + mbox_chan_txdone(chan, 0); + + return reg ? IRQ_HANDLED : IRQ_NONE; +} + +static int a37xx_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct a37xx_mbox *mbox = chan->con_priv; + struct armada_37xx_rwtm_tx_msg *msg = data; + int i; + u32 reg; + + if (!data) + return -EINVAL; + + reg = readl(mbox->base + RWTM_MBOX_FIFO_STATUS); + if (!(reg & FIFO_STS_RDY)) + dev_warn(mbox->dev, "Secure processor not ready\n"); + + if ((reg & FIFO_STS_CNTR_MASK) >= FIFO_STS_CNTR_MAX) { + dev_err(mbox->dev, "Secure processor command queue full\n"); + return -EBUSY; + } + + for (i = 0; i < 16; ++i) + writel(msg->args[i], mbox->base + RWTM_MBOX_PARAM(i)); + writel(msg->command, mbox->base + RWTM_MBOX_COMMAND); + + return 0; +} + +static int a37xx_mbox_startup(struct mbox_chan *chan) +{ + struct a37xx_mbox *mbox = chan->con_priv; + u32 reg; + int ret; + + ret = devm_request_irq(mbox->dev, mbox->irq, a37xx_mbox_irq_handler, 0, + DRIVER_NAME, chan); + if (ret < 0) { + dev_err(mbox->dev, "Cannot request irq\n"); + return ret; + } + + /* enable IRQ generation */ + reg = readl(mbox->base + RWTM_HOST_INT_MASK); + reg &= ~(SP_CMD_COMPLETE | SP_CMD_QUEUE_FULL_ACCESS | SP_CMD_QUEUE_FULL); + writel(reg, mbox->base + RWTM_HOST_INT_MASK); + + return 0; +} + +static void a37xx_mbox_shutdown(struct mbox_chan *chan) +{ + u32 reg; + struct a37xx_mbox *mbox = chan->con_priv; + + /* disable interrupt generation */ + reg = readl(mbox->base + RWTM_HOST_INT_MASK); + reg |= SP_CMD_COMPLETE | SP_CMD_QUEUE_FULL_ACCESS | SP_CMD_QUEUE_FULL; + writel(reg, mbox->base + RWTM_HOST_INT_MASK); + + devm_free_irq(mbox->dev, mbox->irq, chan); +} + +static const struct mbox_chan_ops a37xx_mbox_ops = { + .send_data = a37xx_mbox_send_data, + .startup = a37xx_mbox_startup, + .shutdown = a37xx_mbox_shutdown, +}; + +static int armada_37xx_mbox_probe(struct platform_device *pdev) +{ + struct a37xx_mbox *mbox; + struct resource *regs; + struct mbox_chan *chans; + int ret; + + mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL); + if (!mbox) + return -ENOMEM; + + /* Allocated one channel */ + chans = devm_kzalloc(&pdev->dev, sizeof(*chans), GFP_KERNEL); + if (!chans) + return -ENOMEM; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + mbox->base = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(mbox->base)) { + dev_err(&pdev->dev, "ioremap failed\n"); + return PTR_ERR(mbox->base); + } + + mbox->irq = platform_get_irq(pdev, 0); + if (mbox->irq < 0) { + dev_err(&pdev->dev, "Cannot get irq\n"); + return mbox->irq; + } + + mbox->dev = &pdev->dev; + + /* Hardware supports only one channel. */ + chans[0].con_priv = mbox; + mbox->controller.dev = mbox->dev; + mbox->controller.num_chans = 1; + mbox->controller.chans = chans; + mbox->controller.ops = &a37xx_mbox_ops; + mbox->controller.txdone_irq = true; + + ret = mbox_controller_register(&mbox->controller); + if (ret) { + dev_err(&pdev->dev, "Could not register mailbox controller\n"); + return ret; + } + + platform_set_drvdata(pdev, mbox); + return ret; +} + +static int armada_37xx_mbox_remove(struct platform_device *pdev) +{ + struct a37xx_mbox *mbox = platform_get_drvdata(pdev); + + if (!mbox) + return -EINVAL; + + mbox_controller_unregister(&mbox->controller); + + return 0; +} + +static const struct of_device_id armada_37xx_mbox_match[] = { + { .compatible = "marvell,armada-3700-rwtm-mailbox" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, armada_37xx_mbox_match); + +static struct platform_driver armada_37xx_mbox_driver = { + .probe = armada_37xx_mbox_probe, + .remove = armada_37xx_mbox_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = armada_37xx_mbox_match, + }, +}; + +module_platform_driver(armada_37xx_mbox_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("rWTM BIU Mailbox driver for Armada 37xx"); +MODULE_AUTHOR("Marek Behun "); diff --git a/include/linux/armada-37xx-rwtm-mailbox.h b/include/linux/armada-37xx-rwtm-mailbox.h new file mode 100644 index 000000000000..57bb54f6767a --- /dev/null +++ b/include/linux/armada-37xx-rwtm-mailbox.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * rWTM BIU Mailbox driver for Armada 37xx + * + * Author: Marek Behun + */ + +#ifndef _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_ +#define _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_ + +#include + +struct armada_37xx_rwtm_tx_msg { + u16 command; + u32 args[16]; +}; + +struct armada_37xx_rwtm_rx_msg { + u32 retval; + u32 status[16]; +}; + +#endif /* _LINUX_ARMADA_37XX_RWTM_MAILBOX_H_ */ From patchwork Sun Mar 31 03:15:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9ED8915AC for ; Sun, 31 Mar 2019 03:16:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B25F28917 for ; Sun, 31 Mar 2019 03:16:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F6DD2891F; Sun, 31 Mar 2019 03:16:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B1B4228468 for ; 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Sun, 31 Mar 2019 03:16:20 +0000 Received: from mail.nic.cz ([217.31.204.67]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwi-0003o9-NS for linux-arm-kernel@lists.infradead.org; Sun, 31 Mar 2019 03:15:47 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 2215D635D4; Sun, 31 Mar 2019 05:15:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=K8ZClC8lq/LMOr9HmDpgfWCKd0LITZAPiREs/Lcu0XI=; h=From:To:Date; b=Se/2+3erFBeXUaFXUlh7LhSvYSJSFmd55TBQKppGgNX4lt+MUPmC3xlH2fm+DYAbl abWeXME8QvsKYEyPzJJ87BTQLy5SGWdXSfVpAAaYmiI5dh7t4JGnQBqXbOv0YRHxPk Z5ntKBl5qlnfC7vJrPbbpH0oqOsBY5JCAaKtq6J8= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 3/6] arm64: dts: marvell: armada-37xx: add mailbox node Date: Sun, 31 Mar 2019 05:15:34 +0200 Message-Id: <20190331031537.10626-4-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201545_083823_56F7A253 X-CRM114-Status: UNSURE ( 8.09 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds the rWTM BIU mailbox node for communication with the secure processor. Signed-off-by: Marek Behún --- arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi index f43c43168b00..7f69e3dfcb13 100644 --- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi +++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi @@ -419,6 +419,13 @@ clocks = <&nb_periph_clk 15>; }; + rwtm: mailbox@b0000 { + compatible = "marvell,armada-3700-rwtm-mailbox"; + reg = <0xb0000 0x100>; + interrupts = ; + #mbox-cells = <1>; + }; + sdhci1: sdhci@d0000 { compatible = "marvell,armada-3700-sdhci", "marvell,sdhci-xenon"; From patchwork Sun Mar 31 03:15:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878671 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6CD8F15AC for ; Sun, 31 Mar 2019 03:16:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 592292883F for ; Sun, 31 Mar 2019 03:16:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4D1B328922; Sun, 31 Mar 2019 03:16:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9305A2883F for ; Sun, 31 Mar 2019 03:16:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=KVSDesyJvIcwmGUzBlOvjajSJjspnsvDuAWx3hoyKKA=; b=qYzIA8rD0fjLhS EpnqUgnzxTu3LXWUr7dBPtGqv+a3nlKCh2TvrIJMi9OginoGpxYYErYpRNw4mhjFz7FdjIBmKEuhQ Y4IdK5VGtH/Sgx9PDGUQSRod9M/2LXwXEOdmng+fTvv96ajUylE4NDyegw2hXMxZqDFT8f87OnBza 3fJ1Kfz2qDL9gx0zIlblqPHxl7mHRx1QgLlQrX9jShvRLSqAn3rt2acJDoSrpPhhhDycZgMQ6mKqw 9ZAFO6dl6GgHctalindDQ5pFhUtf1TlB1Lqg38oy8XCQRH6FYAt/co/rvo7aEzT5PvY/ONPBPU0bx 8fpha5O97nJeWmijm4kg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQws-0003xW-W0; Sun, 31 Mar 2019 03:15:55 +0000 Received: from mail.nic.cz ([217.31.204.67]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwi-0003oA-Nl for linux-arm-kernel@lists.infradead.org; Sun, 31 Mar 2019 03:15:46 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 3D82F635EA; Sun, 31 Mar 2019 05:15:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=ilqL0T1bXVJ2WTz11GZd56/0564HlruHA/JJZss7ZIc=; h=From:To:Date; b=tyPRLXWJSGta2VUS9CsvfFjiqbJhq0CdHZSlFnI4sn/16HpJiXHfvJZKe0EGxBrXo qLJ1MkFubGg2ECOfwC/AN6JWF117mTFaBO98rhJudl5uvI5N0FshBRF73lS2D9K74l l+RVha0FdpsOhgh0yMn09n7/tAJtf+fjQwGDMwvo= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 4/6] dt-bindings: firmware: Document cznic, turris-mox-rwtm binding Date: Sun, 31 Mar 2019 05:15:35 +0200 Message-Id: <20190331031537.10626-5-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201545_072859_1086A65E X-CRM114-Status: GOOD ( 10.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds device tree binding documentation for the driver communicating with the rWTM firmware on Turris Mox. Signed-off-by: Marek Behún Reviewed-by: Rob Herring --- .../firmware/cznic,turris-mox-rwtm.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt diff --git a/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt b/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt new file mode 100644 index 000000000000..338169dea7bb --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/cznic,turris-mox-rwtm.txt @@ -0,0 +1,19 @@ +Turris Mox rWTM firmware driver + +Required properties: + - compatible : Should be "cznic,turris-mox-rwtm" + - mboxes : Must contain a reference to associated mailbox + +This device tree node should be used on Turris Mox, or potentially another A3700 +compatible device running the Mox's rWTM firmware in the secure processor (for +example it is possible to flash this firmware into EspressoBin). + +Example: + + firmware { + turris-mox-rwtm { + compatible = "cznic,turris-mox-rwtm"; + mboxes = <&rwtm 0>; + status = "okay"; + }; + }; From patchwork Sun Mar 31 03:15:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878685 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A73F715AC for ; Sun, 31 Mar 2019 03:17:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 913F728468 for ; Sun, 31 Mar 2019 03:17:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8371628917; Sun, 31 Mar 2019 03:17:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7FB7028468 for ; Sun, 31 Mar 2019 03:17:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; bh=bjK86lddJCxEeUNCN3fDPlhiS7vFqvDFg8Zh5NOwTog=; b=kUSQVdVxIoYOAu MbD2Hnh7y4ruSn93/uG6sEsYN62AH6a1r5sK5WpUrk+t46W1gDklJ9OepK6X3WnADIU3X1BXeIYYw DZdyhuQ9jlygBSSi7aUpE1G7ECb8XQUP/1qUcw9POdxaq7h/GQGq8B5hHVfxLaJOPKeZ5TiT43JEd OT37ZDBJYuU4HdesFfTQYssxkBWSgTYTTAZEvdWfhf8uNr+y7+7eAduMJfF9JHeHE9se8/wss6r18 xzpcp489jszumu5xKp6S08IDeGa4EoUvP248a8qOIztJngkFI+Ehwvm2nOwS570ujRsR9WfAuCzr9 ifNo8nPYhvuD5A86dd9A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQxz-0005MV-FT; Sun, 31 Mar 2019 03:17:03 +0000 Received: from mail.nic.cz ([2001:1488:800:400::400]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hAQwl-0003pV-Ux for linux-arm-kernel@lists.infradead.org; Sun, 31 Mar 2019 03:15:53 +0000 Received: from dellmb.labs.office.nic.cz (unknown [IPv6:2001:1488:fffe:6:cac7:3539:7f1f:463]) by mail.nic.cz (Postfix) with ESMTP id 56685635ED; Sun, 31 Mar 2019 05:15:39 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=nPE45lLr/6pOB2OZu9U3RrPg1+mqdpeNAZquFwsydiA=; h=From:To:Date; b=mfaterPcEFkPnoSQRhoQrUnerm4uMFlzxpZWjYaUQqQEy5QY3gHySMwHPzz28aNRs cy8QiQxGfkQ7S2tob7bGRdVJE+gz8Ft2ssf4AokUDGizj+uEhtyUply0triMRlcrLK N4b4i6+SY3QOUalSI4nNbalKAMFNJjD7rc1cM7b0= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 5/6] firmware: Add Turris Mox rWTM firmware driver Date: Sun, 31 Mar 2019 05:15:36 +0200 Message-Id: <20190331031537.10626-6-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201548_338463_DE742DFD X-CRM114-Status: GOOD ( 25.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This adds a driver to communicate with the firmware running on the secure processor of the Turris Mox router, enabling the kernel to retrieve true random numbers from the Entropy Bit Generator and to sign messages with the ECDSA private key burned into each Turris Mox device when manufacturing. This also adds support to read other information burned into eFuses: - serial number - board version - MAC addresses - RAM size - ECDSA public key (this is not read directly from eFuses, rather it is computed by the firmware as pair to the burned private key) The source code of the firmware is open source and can be found at https://gitlab.labs.nic.cz/turris/mox-boot-builder/tree/master/wtmi Signed-off-by: Marek Behún --- drivers/firmware/Kconfig | 14 + drivers/firmware/Makefile | 1 + drivers/firmware/turris-mox-rwtm.c | 508 +++++++++++++++++++++++++++++ 3 files changed, 523 insertions(+) create mode 100644 drivers/firmware/turris-mox-rwtm.c diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index cac16c4b0df3..616c8c1f4174 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -267,6 +267,20 @@ config TI_SCI_PROTOCOL This protocol library is used by client drivers to use the features provided by the system controller. +config TURRIS_MOX_RWTM + tristate "Turris Mox rWTM secure firmware driver" + depends on HAS_DMA && OF + depends on MAILBOX + select HW_RANDOM + select ARMADA_37XX_RWTM_MBOX + help + This driver communicates with the firmware on the Cortex-M3 secure + processor of the Turris Mox router. Enable if you are building for + Turris Mox, and you will be able to read the serial number and + other manufacturing data, sign messages with the internal ECDSA-521 + private key and utilize the Entropy Bit Generator as hardware random + number generator. + config HAVE_ARM_SMCCC bool diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 80feb635120f..7300787141f5 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_QCOM_SCM_64) += qcom_scm-64.o obj-$(CONFIG_QCOM_SCM_32) += qcom_scm-32.o CFLAGS_qcom_scm-32.o :=$(call as-instr,.arch armv7-a\n.arch_extension sec,-DREQUIRES_SEC=1) -march=armv7-a obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o +obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o obj-$(CONFIG_ARM_SCMI_PROTOCOL) += arm_scmi/ obj-y += broadcom/ diff --git a/drivers/firmware/turris-mox-rwtm.c b/drivers/firmware/turris-mox-rwtm.c new file mode 100644 index 000000000000..e5d66460f85b --- /dev/null +++ b/drivers/firmware/turris-mox-rwtm.c @@ -0,0 +1,508 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Turris Mox rWTM firmware driver + * + * Copyright (C) 2019 Marek Behun + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "turris-mox-rwtm" + +/* + * The macros and constants below come from Turris Mox's rWTM firmware code. + * This firmware is open source and it's sources can be found at + * https://gitlab.labs.nic.cz/turris/mox-boot-builder/tree/master/wtmi. + */ + +#define MBOX_STS_SUCCESS (0 << 30) +#define MBOX_STS_FAIL (1 << 30) +#define MBOX_STS_BADCMD (2 << 30) +#define MBOX_STS_ERROR(s) ((s) & (3 << 30)) +#define MBOX_STS_VALUE(s) (((s) >> 10) & 0xfffff) +#define MBOX_STS_CMD(s) ((s) & 0x3ff) + +enum mbox_cmd { + MBOX_CMD_GET_RANDOM = 1, + MBOX_CMD_BOARD_INFO = 2, + MBOX_CMD_ECDSA_PUB_KEY = 3, + MBOX_CMD_HASH = 4, + MBOX_CMD_SIGN = 5, + MBOX_CMD_VERIFY = 6, + + MBOX_CMD_OTP_READ = 7, + MBOX_CMD_OTP_WRITE = 8, +}; + +struct mox_kobject; + +struct mox_rwtm { + struct device *dev; + struct mbox_client mbox_client; + struct mbox_chan *mbox; + struct mox_kobject *kobj; + struct hwrng hwrng; + + struct armada_37xx_rwtm_rx_msg reply; + + void *buf; + dma_addr_t buf_phys; + + /* + * If cmd_done_cb is not null, it is called on rWTM reply event. + * Otherwise cmd_done completion is completed. + */ + struct mutex busy; + struct completion cmd_done; + void (*cmd_done_cb)(struct mox_rwtm *rwtm); + + /* board information */ + int has_board_info; + u64 serial_number; + int board_version, ram_size; + u8 mac_address1[6], mac_address2[6]; + + /* public key burned in eFuse */ + int has_pubkey; + u8 pubkey[135]; + + /* signature process */ + struct kernfs_node *do_sign_kn; + u32 last_sig[34]; + int last_sig_result; +}; + +struct mox_kobject { + struct kobject kobj; + struct mox_rwtm *rwtm; +}; + +static inline struct kobject *rwtm_to_kobj(struct mox_rwtm *rwtm) +{ + return &rwtm->kobj->kobj; +} + +static inline struct mox_rwtm *to_rwtm(struct kobject *kobj) +{ + return container_of(kobj, struct mox_kobject, kobj)->rwtm; +} + +static void mox_kobj_release(struct kobject *kobj) +{ + kfree(to_rwtm(kobj)->kobj); +} + +static struct kobj_type mox_kobj_ktype = { + .release = mox_kobj_release, + .sysfs_ops = &kobj_sysfs_ops, +}; + +static int mox_kobj_create(struct mox_rwtm *rwtm) +{ + rwtm->kobj = kzalloc(sizeof(*rwtm->kobj), GFP_KERNEL); + if (!rwtm->kobj) + return -ENOMEM; + + kobject_init(rwtm_to_kobj(rwtm), &mox_kobj_ktype); + if (kobject_add(rwtm_to_kobj(rwtm), firmware_kobj, "turris-mox-rwtm")) { + kobject_put(rwtm_to_kobj(rwtm)); + return -ENXIO; + } + + rwtm->kobj->rwtm = rwtm; + + return 0; +} + +#define MOX_ATTR_RO(name, format, cat) \ +static ssize_t \ +name##_show(struct kobject *kobj, struct kobj_attribute *a, \ + char *buf) \ +{ \ + struct mox_rwtm *rwtm = to_rwtm(kobj); \ + if (!rwtm->has_##cat) \ + return -ENODATA; \ + return sprintf(buf, format, rwtm->name); \ +} \ +static struct kobj_attribute mox_attr_##name = __ATTR_RO(name) + +MOX_ATTR_RO(serial_number, "%016llX\n", board_info); +MOX_ATTR_RO(board_version, "%i\n", board_info); +MOX_ATTR_RO(ram_size, "%i\n", board_info); +MOX_ATTR_RO(mac_address1, "%pM\n", board_info); +MOX_ATTR_RO(mac_address2, "%pM\n", board_info); +MOX_ATTR_RO(pubkey, "%s\n", pubkey); + +static int mox_get_status(enum mbox_cmd cmd, u32 retval) +{ + if (MBOX_STS_CMD(retval) != cmd || + MBOX_STS_ERROR(retval) != MBOX_STS_SUCCESS) + return -EIO; + else if (MBOX_STS_ERROR(retval) == MBOX_STS_FAIL) + return -(int)MBOX_STS_VALUE(retval); + else + return MBOX_STS_VALUE(retval); +} + +static ssize_t +do_sign_show(struct kobject *kobj, struct kobj_attribute *a, char *buf) +{ + struct mox_rwtm *rwtm = to_rwtm(kobj); + int ret = rwtm->last_sig_result; + + if (!ret) + return -ENODATA; + + if (ret == 1) { + /* 2 arrays of 17 32-bit words are 136 bytes */ + memcpy(buf, rwtm->last_sig, 136); + ret = 136; + } + + rwtm->last_sig_result = 0; + + return ret; +} + +static void +mox_signing_done(struct mox_rwtm *rwtm) +{ + struct armada_37xx_rwtm_rx_msg *reply = &rwtm->reply; + int ret; + + ret = mox_get_status(MBOX_CMD_SIGN, reply->retval); + if (ret < 0) { + rwtm->last_sig_result = ret; + } else { + /* + * Here we read the R and S values of the ECDSA signature + * computed by the rWTM firmware and convert their words from + * LE to BE. + */ + memcpy(rwtm->last_sig, rwtm->buf + 68, 136); + cpu_to_be32_array(rwtm->last_sig, rwtm->last_sig, 34); + rwtm->last_sig_result = 1; + } + + rwtm->cmd_done_cb = NULL; + mutex_unlock(&rwtm->busy); + + sysfs_notify_dirent(rwtm->do_sign_kn); +} + +static ssize_t +do_sign_store(struct kobject *kobj, struct kobj_attribute *a, const char *buf, + size_t count) +{ + struct mox_rwtm *rwtm = to_rwtm(kobj); + struct armada_37xx_rwtm_tx_msg msg; + int ret; + + /* the input is a SHA-512 hash, so exactly 64 bytes have to be read */ + if (count != 64) + return -EINVAL; + + /* if last result is not zero user has not read that information yet */ + if (rwtm->last_sig_result) + return -EBUSY; + + if (!mutex_trylock(&rwtm->busy)) + return -EBUSY; + + rwtm->cmd_done_cb = mox_signing_done; + + /* + * Here we have to send: + * 1. Address of the input to sign. + * The input is an array of 17 32-bit words, the first (most + * significat) is 0, the rest 16 words are copied from the SHA-512 + * hash given by the user and converted from BE to LE. + * 2. Address of the buffer where ECDSA signature value R shall be + * stored by the rWTM firmware. + * 3. Address of the buffer where ECDSA signature value S shall be + * stored by the rWTM firmware. + */ + memset(rwtm->buf, 0, 4); + memcpy(rwtm->buf + 4, buf, 64); + be32_to_cpu_array(rwtm->buf, rwtm->buf, 17); + + msg.command = MBOX_CMD_SIGN; + msg.args[0] = 1; + msg.args[1] = rwtm->buf_phys; + msg.args[2] = rwtm->buf_phys + 68; + msg.args[3] = rwtm->buf_phys + 2 * 68; + ret = mbox_send_message(rwtm->mbox, &msg); + if (ret < 0) + goto unlock_mutex; + + return count; +unlock_mutex: + rwtm->cmd_done_cb = NULL; + mutex_unlock(&rwtm->busy); + return ret; +} + +/* only root should be able to sign */ +static struct kobj_attribute mox_attr_do_sign = + __ATTR(do_sign, 0600, do_sign_show, do_sign_store); + +static const struct attribute *mox_rwtm_attrs[] = { + &mox_attr_serial_number.attr, + &mox_attr_board_version.attr, + &mox_attr_ram_size.attr, + &mox_attr_mac_address1.attr, + &mox_attr_mac_address2.attr, + &mox_attr_pubkey.attr, + &mox_attr_do_sign.attr, + NULL +}; + +static void mox_rwtm_rx_callback(struct mbox_client *cl, void *data) +{ + struct mox_rwtm *rwtm = dev_get_drvdata(cl->dev); + struct armada_37xx_rwtm_rx_msg *msg = data; + + rwtm->reply = *msg; + if (rwtm->cmd_done_cb) + rwtm->cmd_done_cb(rwtm); + else + complete(&rwtm->cmd_done); +} + +static void reply_to_mac_addr(u8 *mac, u32 t1, u32 t2) +{ + mac[0] = t1 >> 8; + mac[1] = t1; + mac[2] = t2 >> 24; + mac[3] = t2 >> 16; + mac[4] = t2 >> 8; + mac[5] = t2; +} + +static int mox_get_board_info(struct mox_rwtm *rwtm) +{ + struct armada_37xx_rwtm_tx_msg msg; + struct armada_37xx_rwtm_rx_msg *reply = &rwtm->reply; + int ret; + + msg.command = MBOX_CMD_BOARD_INFO; + ret = mbox_send_message(rwtm->mbox, &msg); + if (ret < 0) + return ret; + + ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2); + if (ret < 0) + return ret; + + ret = mox_get_status(MBOX_CMD_BOARD_INFO, reply->retval); + if (ret < 0 && ret != -ENODATA) { + return ret; + } else if (ret == -ENODATA) { + dev_warn(rwtm->dev, + "Board does not have manufacturing information burned!\n"); + } else { + rwtm->serial_number = reply->status[1]; + rwtm->serial_number <<= 32; + rwtm->serial_number |= reply->status[0]; + rwtm->board_version = reply->status[2]; + rwtm->ram_size = reply->status[3]; + reply_to_mac_addr(rwtm->mac_address1, reply->status[4], + reply->status[5]); + reply_to_mac_addr(rwtm->mac_address2, reply->status[6], + reply->status[7]); + rwtm->has_board_info = 1; + + pr_info("Turris Mox serial number %016llX\n", + rwtm->serial_number); + pr_info(" board version %i\n", rwtm->board_version); + pr_info(" burned RAM size %i MiB\n", rwtm->ram_size); + } + + msg.command = MBOX_CMD_ECDSA_PUB_KEY; + ret = mbox_send_message(rwtm->mbox, &msg); + if (ret < 0) + return ret; + + ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2); + if (ret < 0) + return ret; + + ret = mox_get_status(MBOX_CMD_ECDSA_PUB_KEY, reply->retval); + if (ret < 0 && ret != -ENODATA) { + return ret; + } else if (ret == -ENODATA) { + dev_warn(rwtm->dev, "Board has no public key burned!\n"); + } else { + u32 *s = reply->status; + + rwtm->has_pubkey = 1; + sprintf(rwtm->pubkey, + "%06x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x", + ret, s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], + s[8], s[9], s[10], s[11], s[12], s[13], s[14], s[15]); + } + + return 0; +} + +static int mox_hwrng_read(struct hwrng *rng, void *data, size_t max, bool wait) +{ + struct mox_rwtm *rwtm = (struct mox_rwtm *) rng->priv; + struct armada_37xx_rwtm_tx_msg msg; + int ret; + + if (max > 4096) + max = 4096; + + msg.command = MBOX_CMD_GET_RANDOM; + msg.args[0] = 1; + msg.args[1] = rwtm->buf_phys; + msg.args[2] = (max + 3) & ~3; + + if (!wait) { + if (!mutex_trylock(&rwtm->busy)) + return -EBUSY; + } else { + mutex_lock(&rwtm->busy); + } + + ret = mbox_send_message(rwtm->mbox, &msg); + if (ret < 0) + goto unlock_mutex; + + ret = wait_for_completion_interruptible(&rwtm->cmd_done); + if (ret < 0) + goto unlock_mutex; + + ret = mox_get_status(MBOX_CMD_GET_RANDOM, rwtm->reply.retval); + if (ret < 0) + goto unlock_mutex; + + memcpy(data, rwtm->buf, max); + ret = max; + +unlock_mutex: + mutex_unlock(&rwtm->busy); + return ret; +} + +static int turris_mox_rwtm_probe(struct platform_device *pdev) +{ + struct mox_rwtm *rwtm; + struct device *dev = &pdev->dev; + int ret; + + rwtm = devm_kzalloc(dev, sizeof(*rwtm), GFP_KERNEL); + if (!rwtm) + return -ENOMEM; + + rwtm->dev = dev; + rwtm->buf = dmam_alloc_coherent(dev, PAGE_SIZE, &rwtm->buf_phys, + GFP_KERNEL); + if (!rwtm->buf) + return -ENOMEM; + + ret = mox_kobj_create(rwtm); + if (ret < 0) { + dev_err(dev, "Cannot create turris-mox-rwtm kobject!\n"); + return ret; + } + + ret = sysfs_create_files(rwtm_to_kobj(rwtm), mox_rwtm_attrs); + if (ret < 0) { + dev_err(dev, "Cannot create sysfs files!\n"); + goto put_kobj; + } + + rwtm->do_sign_kn = sysfs_get_dirent(rwtm->kobj->kobj.sd, "do_sign"); + if (!rwtm->do_sign_kn) { + dev_err(dev, "Cannot get do_sign node\n"); + ret = -ENXIO; + goto remove_files; + } + + platform_set_drvdata(pdev, rwtm); + + mutex_init(&rwtm->busy); + + rwtm->mbox_client.dev = dev; + rwtm->mbox_client.rx_callback = mox_rwtm_rx_callback; + + rwtm->mbox = mbox_request_channel(&rwtm->mbox_client, 0); + if (IS_ERR(rwtm->mbox)) { + ret = PTR_ERR(rwtm->mbox); + if (ret != -EPROBE_DEFER) + dev_err(dev, "Cannot request mailbox channel: %i\n", + ret); + goto remove_files; + } + + init_completion(&rwtm->cmd_done); + + ret = mox_get_board_info(rwtm); + if (ret < 0) + dev_warn(dev, "Cannot read board information: %i\n", ret); + + rwtm->hwrng.name = DRIVER_NAME "_hwrng"; + rwtm->hwrng.read = mox_hwrng_read; + rwtm->hwrng.priv = (unsigned long) rwtm; + rwtm->hwrng.quality = 1024; + + ret = devm_hwrng_register(dev, &rwtm->hwrng); + if (ret < 0) { + dev_err(dev, "Cannot register HWRNG: %i\n", ret); + goto free_channel; + } + + return 0; + +free_channel: + mbox_free_channel(rwtm->mbox); +remove_files: + sysfs_remove_files(rwtm_to_kobj(rwtm), mox_rwtm_attrs); +put_kobj: + kobject_put(rwtm_to_kobj(rwtm)); + return ret; +} + +static int turris_mox_rwtm_remove(struct platform_device *pdev) +{ + struct mox_rwtm *rwtm = platform_get_drvdata(pdev); + + sysfs_put(rwtm->do_sign_kn); + sysfs_remove_files(rwtm_to_kobj(rwtm), mox_rwtm_attrs); + kobject_put(rwtm_to_kobj(rwtm)); + mbox_free_channel(rwtm->mbox); + + return 0; +} + +static const struct of_device_id turris_mox_rwtm_match[] = { + { .compatible = "cznic,turris-mox-rwtm", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, turris_mox_rwtm_match); + +static struct platform_driver turris_mox_rwtm_driver = { + .probe = turris_mox_rwtm_probe, + .remove = turris_mox_rwtm_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = turris_mox_rwtm_match, + }, +}; +module_platform_driver(turris_mox_rwtm_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Turris Mox rWTM firmware driver"); +MODULE_AUTHOR("Marek Behun "); From patchwork Sun Mar 31 03:15:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 10878683 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 11134922 for ; Sun, 31 Mar 2019 03:16:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0C1128468 for ; Sun, 31 Mar 2019 03:16:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E492B28917; Sun, 31 Mar 2019 03:16:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 85CC528468 for ; Sun, 31 Mar 2019 03:16:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: 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: List-Owner; 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a=rsa-sha256; c=relaxed/simple; d=nic.cz; s=default; t=1554002139; bh=kaKbvPrh06oT00xDZyUk9wq+ZqUPUkEk6HDMmKKZYqo=; h=From:To:Date; b=QXjsJu6e1SPp6H435XhuyKsQ1VxBtZVje+3wTcWLXdCcw5TJXdHpiKbc8h+Sf3PEc u1feEY7iFDbHPaumNRY9qoIm01oI0+R3r4M87TIufqV1YnwmUzZmXs1OZNbhEOLmVu JNOVsSgo4wWna6KArOokiIzeerQ9O7TOQVAhB9Nk= From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Jassi Brar Subject: [PATCH v3 crypto+mailbox+firmware RESEND 6/6] firmware: turris-mox-rwtm: Add sysfs documentation Date: Sun, 31 Mar 2019 05:15:37 +0200 Message-Id: <20190331031537.10626-7-marek.behun@nic.cz> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20190331031537.10626-1-marek.behun@nic.cz> References: <20190331031537.10626-1-marek.behun@nic.cz> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at mail X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190330_201548_326192_74842BD2 X-CRM114-Status: GOOD ( 11.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Herbert Xu , Gregory CLEMENT , linux-kernel@vger.kernel.org, =?utf-8?q?Marek_Beh=C3=BAn?= , Jassi Brar , arm@kernel.org, Linux Crypto Mailing List , Miquel Raynal , Linus Walleij , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add sysfs ABI documentation for the sysfs files created by the turris-mox-rwtm driver. Signed-off-by: Marek Behún --- .../testing/sysfs-firmware-turris-mox-rwtm | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm diff --git a/Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm b/Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm new file mode 100644 index 000000000000..ff6cd30f0cf2 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-firmware-turris-mox-rwtm @@ -0,0 +1,60 @@ +What: /sys/firmware/turris-mox-rwtm/board_version +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (R) Board version burned into eFuses of this Turris Mox board. + Format: %i + +What: /sys/firmware/turris-mox-rwtm/do_sign +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (RW) Gate for writing requests for signature with the ECDSA + private key burned into eFuses during the manufacturing process, + and also for reading the resulting signature. + + When requesting for signature, a SHA-512 hash of the message to + be signed should be written in binary form to this file. This + means that a write() operation into this file shall write + exactly 64 bytes, buffers of other size are ignored. + + When the signature is done or the rWTM firmware responded with + an error, this file is notified via poll, and the result can + then be read. On error, the read() operation fails with errno + corresponding with the error. On success, 136 bytes are copied + to the buffer - 68 bytes for the R value and 68 for the S value + of the ECDSA signature, in binary form. These are 2 arrays of 17 + 32-bit words, in big-endian form, most significat word first. + + Format: binary + +What: /sys/firmware/turris-mox-rwtm/mac_address* +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (R) MAC addresses burned into eFuses of this Turris Mox board. + Format: %pM + +What: /sys/firmware/turris-mox-rwtm/pubkey +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (R) ECDSA public key (in pubkey hex compressed form) computed + as pair to the ECDSA private key burned into eFuses of this + Turris Mox Board. + Format: string + +What: /sys/firmware/turris-mox-rwtm/ram_size +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (R) RAM size in MiB of this Turris Mox board as was detected + during manufacturing and burned into eFuses. Can be 512 or 1024. + Format: %i + +What: /sys/firmware/turris-mox-rwtm/serial_number +Date: March 2019 +KernelVersion: 5.2 +Contact: Marek Behún +Description: (R) Serial number burned into eFuses of this Turris Mox device. + Format: %016X