From patchwork Tue May 26 19:20:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Uvarov X-Patchwork-Id: 11571113 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7C89792A for ; Tue, 26 May 2020 19:20:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 622F320776 for ; Tue, 26 May 2020 19:20:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="jj4f8a19" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392115AbgEZTUp (ORCPT ); Tue, 26 May 2020 15:20:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389914AbgEZTUl (ORCPT ); Tue, 26 May 2020 15:20:41 -0400 Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB125C03E97A for ; Tue, 26 May 2020 12:20:40 -0700 (PDT) Received: by mail-lf1-x143.google.com with SMTP id 202so12999091lfe.5 for ; Tue, 26 May 2020 12:20:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Ly/hqC+OpwfmKTz5BxiBCk11qr5IjD5u5LkJ+5oge9k=; b=jj4f8a195bN/b2zB0ZWQf3ep6OWmBs6zZXB82xREt0TC5NGBrTNUCijzfLG9tRAdIK X99OlquY/pzaajwkJAmiKXLaJFMpFPjH+sLgBNlKWih4Uqb+kNLvNAQ+cAVkWfN4nZoE jO27YRbzPZiI/0PDsa+cqiGOihNRASdZNJqytfExMb7zRpBrfdmx+rL0VObMbdXZLKGj t8ezQ6snhHP0NF9+Mk8G3VSMMU4rMLwzdODFq1sIh6j/+5sHtR9UA+/aMuUW6Zlptv1J 4rK9T3xCCs/KmJbux2DwBioegj5HxMZluKwJyuaSOnzOMQql5XtnOqAJPianl5V41bLw WBgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Ly/hqC+OpwfmKTz5BxiBCk11qr5IjD5u5LkJ+5oge9k=; b=pO86rfoynKo5WFuGw8fbRdMF6sPi3AdKaV1fhhY8XXgtzwFNq3Gw4GwTRqj4U/gUIy gIs04m7SiqBiWHORmhVkk+1qxTqCux43uKSnjKxU57Nw4iMCUN4UYnQkx9P1981JZQph vb9trbtEXU0HUsE+g93/SVmSuFDQQ3ejbPqH0Z1i+OojhOPY2ksyK6AlfmKsxHDIKH5B BgXnk9tVD2m+KecRP9bASJQmsj/rpXwueeCFhvB/F+cPF1lPPdTsTeOzm6XG1pXfqbvk Oo5cMkGHQ/31/xelkv8mAD6AvGrjY5AeBmQlaSa7xhf0auLGN0VzZ3A+t36ar8IChKwq BHbQ== X-Gm-Message-State: AOAM532rWWGYRaq4usx6r4etXG2Wy8bnnebl2RYfalyQ9TYOtHEpHDM6 UtE9T4yjtXWxNVQO29G5z7jTyg== X-Google-Smtp-Source: ABdhPJyIwCdPdWx3iVuj+HKFf4k9Bryj+HGLN3dX9mcIw6ozQM5joA/WEGJP/4OCMDV7hiHVBnZw4w== X-Received: by 2002:a05:6512:411:: with SMTP id u17mr1203700lfk.106.1590520839212; Tue, 26 May 2020 12:20:39 -0700 (PDT) Received: from localhost.localdomain ([176.59.41.83]) by smtp.gmail.com with ESMTPSA id i8sm180483lfo.62.2020.05.26.12.20.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2020 12:20:38 -0700 (PDT) From: Maxim Uvarov To: linux-kernel@vger.kernel.org, tee-dev@lists.linaro.org Cc: peterhuewe@gmx.de, jarkko.sakkinen@linux.intel.com, jgg@ziepe.ca, gregkh@linuxfoundation.org, jens.wiklander@linaro.org, linux-integrity@vger.kernel.org, arnd@linaro.org, sumit.garg@linaro.org, Maxim Uvarov Subject: [PATCHv4 3/3] tpm_ftpm_tee: register driver on TEE bus Date: Tue, 26 May 2020 22:20:29 +0300 Message-Id: <20200526192029.863-4-maxim.uvarov@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200526192029.863-1-maxim.uvarov@linaro.org> References: <20200526192029.863-1-maxim.uvarov@linaro.org> Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Register driver on the TEE bus. The module tee registers bus, and module optee calls optee_enumerate_devices() to scan all devices on the bus. Trusted Application for this driver can be Early TA's (can be compiled into optee-os). In that case it will be on OPTEE bus before linux booting. Also optee-suplicant application is needed to be loaded between OPTEE module and ftpm module to maintain functionality for fTPM driver. Signed-off-by: Maxim Uvarov Suggested-by: Sumit Garg Suggested-by: Arnd Bergmann --- drivers/char/tpm/tpm_ftpm_tee.c | 70 ++++++++++++++++++++++++++++----- 1 file changed, 60 insertions(+), 10 deletions(-) diff --git a/drivers/char/tpm/tpm_ftpm_tee.c b/drivers/char/tpm/tpm_ftpm_tee.c index 22bf553ccf9d..28da638360d8 100644 --- a/drivers/char/tpm/tpm_ftpm_tee.c +++ b/drivers/char/tpm/tpm_ftpm_tee.c @@ -214,11 +214,10 @@ static int ftpm_tee_match(struct tee_ioctl_version_data *ver, const void *data) * Return: * On success, 0. On failure, -errno. */ -static int ftpm_tee_probe(struct platform_device *pdev) +static int ftpm_tee_probe(struct device *dev) { int rc; struct tpm_chip *chip; - struct device *dev = &pdev->dev; struct ftpm_tee_private *pvt_data = NULL; struct tee_ioctl_open_session_arg sess_arg; @@ -297,6 +296,13 @@ static int ftpm_tee_probe(struct platform_device *pdev) return rc; } +static int ftpm_plat_tee_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + return ftpm_tee_probe(dev); +} + /** * ftpm_tee_remove() - remove the TPM device * @pdev: the platform_device description. @@ -304,9 +310,9 @@ static int ftpm_tee_probe(struct platform_device *pdev) * Return: * 0 always. */ -static int ftpm_tee_remove(struct platform_device *pdev) +static int ftpm_tee_remove(struct device *dev) { - struct ftpm_tee_private *pvt_data = dev_get_drvdata(&pdev->dev); + struct ftpm_tee_private *pvt_data = dev_get_drvdata(dev); /* Release the chip */ tpm_chip_unregister(pvt_data->chip); @@ -328,11 +334,18 @@ static int ftpm_tee_remove(struct platform_device *pdev) return 0; } +static int ftpm_plat_tee_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + return ftpm_tee_remove(dev); +} + /** * ftpm_tee_shutdown() - shutdown the TPM device * @pdev: the platform_device description. */ -static void ftpm_tee_shutdown(struct platform_device *pdev) +static void ftpm_plat_tee_shutdown(struct platform_device *pdev) { struct ftpm_tee_private *pvt_data = dev_get_drvdata(&pdev->dev); @@ -347,17 +360,54 @@ static const struct of_device_id of_ftpm_tee_ids[] = { }; MODULE_DEVICE_TABLE(of, of_ftpm_tee_ids); -static struct platform_driver ftpm_tee_driver = { +static struct platform_driver ftpm_tee_plat_driver = { .driver = { .name = "ftpm-tee", .of_match_table = of_match_ptr(of_ftpm_tee_ids), }, - .probe = ftpm_tee_probe, - .remove = ftpm_tee_remove, - .shutdown = ftpm_tee_shutdown, + .shutdown = ftpm_plat_tee_shutdown, + .probe = ftpm_plat_tee_probe, + .remove = ftpm_plat_tee_remove, +}; + +/* UUID of the fTPM TA */ +static const struct tee_client_device_id optee_ftpm_id_table[] = { + {UUID_INIT(0xbc50d971, 0xd4c9, 0x42c4, + 0x82, 0xcb, 0x34, 0x3f, 0xb7, 0xf3, 0x78, 0x96)}, + {} }; -module_platform_driver(ftpm_tee_driver); +MODULE_DEVICE_TABLE(tee, optee_ftpm_id_table); + +static struct tee_client_driver ftpm_tee_driver = { + .id_table = optee_ftpm_id_table, + .driver = { + .name = "optee-ftpm", + .bus = &tee_bus_type, + .probe = ftpm_tee_probe, + .remove = ftpm_tee_remove, + }, +}; + +static int __init ftpm_mod_init(void) +{ + int rc; + + rc = platform_driver_register(&ftpm_tee_plat_driver); + if (rc) + return rc; + + return driver_register(&ftpm_tee_driver.driver); +} + +static void __exit ftpm_mod_exit(void) +{ + platform_driver_unregister(&ftpm_tee_plat_driver); + driver_unregister(&ftpm_tee_driver.driver); +} + +module_init(ftpm_mod_init); +module_exit(ftpm_mod_exit); MODULE_AUTHOR("Thirupathaiah Annapureddy "); MODULE_DESCRIPTION("TPM Driver for fTPM TA in TEE");