From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932116AbbDQHw5 (ORCPT ); Fri, 17 Apr 2015 03:52:57 -0400 Received: from mail-lb0-f180.google.com ([209.85.217.180]:36671 "EHLO mail-lb0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753706AbbDQHwd (ORCPT ); Fri, 17 Apr 2015 03:52:33 -0400 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 Cc: Herbert Xu , tpmdd-devel@lists.sourceforge.net, valentin.manea@huawei.com, jean-michel.delorme@st.com, emmanuel.michel@st.com, Jens Wiklander 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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"); -- 1.9.1