From patchwork Fri Apr 17 07:50:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Wiklander X-Patchwork-Id: 6229101 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2D82F9F1AC for ; Fri, 17 Apr 2015 07:56:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0F9A62026D for ; Fri, 17 Apr 2015 07:56:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 01005201BC for ; Fri, 17 Apr 2015 07:56:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yj15L-0002lC-Aw; Fri, 17 Apr 2015 07:53:11 +0000 Received: from mail-lb0-f174.google.com ([209.85.217.174]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yj153-0002Xq-IV for linux-arm-kernel@lists.infradead.org; Fri, 17 Apr 2015 07:52:55 +0000 Received: by lbcga7 with SMTP id ga7so76689959lbc.1 for ; Fri, 17 Apr 2015 00:52:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=62Ae/zvHlOQvJxaYXrI8qXJpmlfhqoHUjSYoG2vLvB0=; b=M+LGXGbohUisLXE1VHj3KHMJwDUtGLJiqyabEoWF3ataFNxYCmPOez5/lnXNx82W31 B+9uj6nxBf2wD1wSimKpaY+aS124SP5ip4Tcq/f0GLBfxbtncRraD0LlfTXfTnXR6tFN 91an/ZJd8KIhjUuYvxoktlOEwZ+HHwPnWsORpaoveNMbHRxcd67bg4H+wXD4SqljM3ef 5/uNUeor8WxERvZSqPF25jbdyCbqpjKVZh0V4puKUtfssvK3cgQVPDer2uG4tBIWgeYb abceUmJnVJ3V1jyFUrcsvyHcZGGUpTY4DNtzAqZmDHpqvrqz5WkjEjzXwEClmJGkPQKd NWCA== X-Gm-Message-State: ALoCoQmiS0puRNEheDrnoYYJLgZLqh98pXNAgMtK+CKcTQD7myAoX5N5dy0rEBuHw3IIwI2tWCWM X-Received: by 10.152.5.39 with SMTP id p7mr1475949lap.18.1429257151661; Fri, 17 Apr 2015 00:52:31 -0700 (PDT) Received: from localhost.localdomain ([85.235.11.236]) by mx.google.com with ESMTPSA id aj4sm2240368lbd.5.2015.04.17.00.52.30 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 17 Apr 2015 00:52:31 -0700 (PDT) From: Jens Wiklander To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Arnd Bergmann , Greg Kroah-Hartman , javier@javigon.com Subject: [RFC PATCH 2/2] tee: add OP-TEE driver Date: Fri, 17 Apr 2015 09:50:57 +0200 Message-Id: <1429257057-7935-3-git-send-email-jens.wiklander@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1429257057-7935-1-git-send-email-jens.wiklander@linaro.org> References: <1429257057-7935-1-git-send-email-jens.wiklander@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150417_005254_038560_A8BA3F3F X-CRM114-Status: GOOD ( 13.87 ) X-Spam-Score: -0.7 (/) Cc: valentin.manea@huawei.com, emmanuel.michel@st.com, Herbert Xu , jean-michel.delorme@st.com, tpmdd-devel@lists.sourceforge.net, Jens Wiklander X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Adds mostly stubbed OP-TEE driver which also can be compiled as a loadable module. Signed-off-by: Jens Wiklander --- drivers/tee/Kconfig | 10 +++ drivers/tee/Makefile | 1 + drivers/tee/optee/Kconfig | 7 ++ drivers/tee/optee/Makefile | 2 + drivers/tee/optee/core.c | 192 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 212 insertions(+) create mode 100644 drivers/tee/optee/Kconfig create mode 100644 drivers/tee/optee/Makefile create mode 100644 drivers/tee/optee/core.c diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig index 64a8cd7..b269276 100644 --- a/drivers/tee/Kconfig +++ b/drivers/tee/Kconfig @@ -6,3 +6,13 @@ config TEE help This implements a generic interface towards a Trusted Execution Environment (TEE). + +if TEE + +menu "TEE drivers" + +source "drivers/tee/optee/Kconfig" + +endmenu + +endif diff --git a/drivers/tee/Makefile b/drivers/tee/Makefile index 60d2dab..53f3c76 100644 --- a/drivers/tee/Makefile +++ b/drivers/tee/Makefile @@ -1,3 +1,4 @@ obj-y += tee.o obj-y += tee_shm.o obj-y += tee_shm_pool.o +obj-$(CONFIG_OPTEE) += optee/ diff --git a/drivers/tee/optee/Kconfig b/drivers/tee/optee/Kconfig new file mode 100644 index 0000000..f43af5e --- /dev/null +++ b/drivers/tee/optee/Kconfig @@ -0,0 +1,7 @@ +# OP-TEE Trusted Execution Environment Configuration +config OPTEE + tristate "OP-TEE" + default n + select DMA_CMA + help + This implements the OP-TEE Trusted Execution Environment (TEE) driver. diff --git a/drivers/tee/optee/Makefile b/drivers/tee/optee/Makefile new file mode 100644 index 0000000..124d22c --- /dev/null +++ b/drivers/tee/optee/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_OPTEE) += optee.o +optee-objs += core.o diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c new file mode 100644 index 0000000..e0f0755 --- /dev/null +++ b/drivers/tee/optee/core.c @@ -0,0 +1,192 @@ +/* + * Copyright (c) 2015, Linaro Limited + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRIVER_NAME "tee-optee" +#define OPTEE_VERSION 1 + +struct optee { + struct tee_device *supp_teedev; + struct tee_device *teedev; + struct device *dev; + struct tee_shm_pool *pool; +}; + +struct optee_context_data { + int dummy; +}; + +static void optee_get_version(struct tee_context *ctx, + u32 *version, u8 *uuid) +{ + *version = OPTEE_VERSION; + memset(uuid, 0, TEE_UUID_SIZE); +} + +static int optee_open(struct tee_context *ctx) +{ + ctx->data = kzalloc(sizeof(struct optee_context_data), GFP_KERNEL); + if (!ctx->data) + return -ENOMEM; + return 0; +} + +static void optee_release(struct tee_context *ctx) +{ + kfree(ctx->data); + ctx->data = NULL; +} + +static int optee_cmd(struct tee_context *ctx, void __user *buf, size_t len) +{ + return -EINVAL; +} + +static int optee_shm_share(struct tee_shm *shm) +{ + /* No special action needed to share memory with OP-TEE */ + return 0; +} + +static void optee_shm_unshare(struct tee_shm *shm) +{ +} + +static struct tee_driver_ops optee_ops = { + .get_version = optee_get_version, + .open = optee_open, + .release = optee_release, + .cmd = optee_cmd, + .shm_share = optee_shm_share, + .shm_unshare = optee_shm_unshare, +}; + +static struct tee_desc optee_desc = { + .name = DRIVER_NAME "-clnt", + .ops = &optee_ops, + .owner = THIS_MODULE, +}; + +static int optee_supp_cmd(struct tee_context *teectx, void __user *buf, + size_t len) +{ + return -EINVAL; +} + +static struct tee_driver_ops optee_supp_ops = { + .get_version = optee_get_version, + .open = optee_open, + .release = optee_release, + .cmd = optee_supp_cmd, + .shm_share = optee_shm_share, + .shm_unshare = optee_shm_unshare, +}; + +static struct tee_desc optee_supp_desc = { + .name = DRIVER_NAME "-supp", + .ops = &optee_supp_ops, + .owner = THIS_MODULE, + .flags = TEE_DESC_PRIVILEGED, +}; + +static int optee_probe(struct platform_device *pdev) +{ + struct tee_shm_pool *pool; + struct optee *optee; + u_long vaddr; + phys_addr_t paddr; + size_t size; + int ret; + + pool = tee_shm_pool_alloc_cma(&pdev->dev, &vaddr, &paddr, &size); + if (IS_ERR(pool)) + return PTR_ERR(pool); + + dev_info(&pdev->dev, "pool: va 0x%lx pa 0x%lx size %zx\n", + vaddr, (u_long)paddr, size); + + optee = devm_kzalloc(&pdev->dev, sizeof(*optee), GFP_KERNEL); + if (!optee) { + ret = -ENOMEM; + goto err; + } + + optee->dev = &pdev->dev; + + optee->teedev = tee_register(&optee_desc, &pdev->dev, pool, optee); + if (IS_ERR(optee->teedev)) { + ret = PTR_ERR(optee->teedev); + goto err; + } + + optee->supp_teedev = tee_register(&optee_supp_desc, &pdev->dev, pool, + optee); + if (!optee->teedev) { + ret = PTR_ERR(optee->teedev); + goto err; + } + + optee->pool = pool; + platform_set_drvdata(pdev, optee); + + dev_info(&pdev->dev, "initialized driver\n"); + return 0; +err: + if (optee && optee->teedev) + tee_unregister(optee->teedev); + if (pool) + tee_shm_pool_free(pool); + return ret; +} + +static int optee_remove(struct platform_device *pdev) +{ + struct optee *optee = platform_get_drvdata(pdev); + + tee_unregister(optee->teedev); + tee_unregister(optee->supp_teedev); + tee_shm_pool_free(optee->pool); + + return 0; +} + +static const struct of_device_id optee_match[] = { + { .compatible = "optee,optee-tz" }, + {}, +}; + +static struct platform_driver optee_driver = { + .driver = { + .name = DRIVER_NAME, + .of_match_table = optee_match, + }, + .probe = optee_probe, + .remove = optee_remove, +}; + +module_platform_driver(optee_driver); + +MODULE_AUTHOR("Linaro"); +MODULE_DESCRIPTION("OP-TEE TEE driver"); +MODULE_SUPPORTED_DEVICE(""); +MODULE_VERSION("1.0"); +MODULE_LICENSE("GPL v2");