From patchwork Wed Apr 7 02:04:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kashyap Desai X-Patchwork-Id: 12186551 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=-18.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,MIME_HEADER_CTYPE_ONLY, SPF_HELO_NONE,SPF_PASS,T_TVD_MIME_NO_HEADERS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 92C95C433ED for ; Wed, 7 Apr 2021 02:05:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A569613B8 for ; Wed, 7 Apr 2021 02:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348078AbhDGCFW (ORCPT ); Tue, 6 Apr 2021 22:05:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54130 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344334AbhDGCFM (ORCPT ); Tue, 6 Apr 2021 22:05:12 -0400 Received: from mail-pg1-x530.google.com (mail-pg1-x530.google.com [IPv6:2607:f8b0:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D3EFC06174A for ; Tue, 6 Apr 2021 19:05:03 -0700 (PDT) Received: by mail-pg1-x530.google.com with SMTP id q10so11842750pgj.2 for ; Tue, 06 Apr 2021 19:05:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tkwfHIRYfN2h7t1CEDvueuBo5h33KD2M+i+Yvktydks=; b=Kmj+b2Zq8layVggd+tPfuO2gR9INVqsYEXlOq4E8lN1IEhHJ237sWk0cYXP1JvDt5k Sqb0DLLYR3AN84l1VeF3yZWs3Aq5z0BwS0isRRBjn+aQJqaTb3l8/J9eQBPXzRkcxPAe 1ajKVIMUy+5oGexAut7gl+oDOVljCKDsetuWo= 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=tkwfHIRYfN2h7t1CEDvueuBo5h33KD2M+i+Yvktydks=; b=hg8dPl3SqBC9YBTU2cuPqoetc9zYLX58x56cgBe6wk+hNkYJJI7PIDQ0vBJt4cDaHK P32DGYgRFvweXEgIRvG/X/XfKOT1kh61E18vHr/TTE8008CMCCa2o/6XzakYu64JCQoJ gFzosYI723PLq60I8qMYWxKkLBCHfIWmhgkFsZDiXS9tTMVR1gocntQOZraj6cXZ5qhe oSP3t6rvNdfb6Y+CyErHLGhIBKT4n6ZgZUwEI6ZLtMqhfgE1dXeOObFo6wIIZMveo30a fAFtOuCtSPCUF8iE5LquTCUYrXlHPzJzg/RXkA+Dtf5kkLPDcTn68K48ptgCDK+gKyBY ruaA== X-Gm-Message-State: AOAM533GUeJsEG+o1NtPPVN+nUzsqhCvwnq7hlZazBrGeAaTgvF/Re0i mg+oxisi+naOvlsXgzX65EEFm2HU/lmtYkh4b34NE0gVm7eyTy07/QcLanKRyxOh4ng1RQUc0JW mQXhDeU7I60UjOmWYe0C5hQ4b9HIYDPPRpufhtrfPDXqpZoqkQWeKd8X4X86Qms6Wq8GVJQV0Xb 98cLJ82w== X-Google-Smtp-Source: ABdhPJwO/aq+LjNCzjRzIFvA1UyVybJ8gT+C2MmSxcCPJYdM+qve9CPhgregSho7G1bz5SgSwfn+aA== X-Received: by 2002:a62:6497:0:b029:220:d96a:8a79 with SMTP id y145-20020a6264970000b0290220d96a8a79mr783041pfb.23.1617761102280; Tue, 06 Apr 2021 19:05:02 -0700 (PDT) Received: from drv-bst-rhel8.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id y9sm3435858pja.50.2021.04.06.19.05.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Apr 2021 19:05:01 -0700 (PDT) From: Kashyap Desai To: linux-scsi@vger.kernel.org Cc: Kashyap Desai , sathya.prakash@broadcom.com Subject: [PATCH v2 22/24] mpi3mr: add support of DSN secure fw check Date: Wed, 7 Apr 2021 07:34:49 +0530 Message-Id: <20210407020451.924822-23-kashyap.desai@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210407020451.924822-1-kashyap.desai@broadcom.com> References: <20210407020451.924822-1-kashyap.desai@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Read PCI_EXT_CAP_ID_DSN to know security status. Driver will throw an warning message when a non-secure type controller is detected. Purpose of this interface is to avoid interacting with any firmware which is not secured/signed by Broadcom. Any tampering on Firmware component will be detected by hardware and it will be communicated to the driver to avoid any further interaction with that component. Signed-off-by: Kashyap Desai Reviewed-by: Hannes Reinecke Cc: sathya.prakash@broadcom.com Reviewed-by: Tomas Henzl --- drivers/scsi/mpi3mr/mpi3mr.h | 9 ++++ drivers/scsi/mpi3mr/mpi3mr_os.c | 80 +++++++++++++++++++++++++++++++++ 2 files changed, 89 insertions(+) diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 505df0e7b852..db9cb11db3bf 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -149,6 +149,15 @@ extern struct list_head mrioc_list; #define MPI3MR_IRQ_POLL_SLEEP 2 #define MPI3MR_IRQ_POLL_TRIGGER_IOCOUNT 8 +/* Definitions for the controller security status*/ +#define MPI3MR_CTLR_SECURITY_STATUS_MASK 0x0C +#define MPI3MR_CTLR_SECURE_DBG_STATUS_MASK 0x02 + +#define MPI3MR_INVALID_DEVICE 0x00 +#define MPI3MR_CONFIG_SECURE_DEVICE 0x04 +#define MPI3MR_HARD_SECURE_DEVICE 0x08 +#define MPI3MR_TAMPERED_DEVICE 0x0C + /* SGE Flag definition */ #define MPI3MR_SGEFLAGS_SYSTEM_SIMPLE_END_OF_LIST \ (MPI3_SGE_FLAGS_ELEMENT_TYPE_SIMPLE | MPI3_SGE_FLAGS_DLAS_SYSTEM | \ diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c index 2c8c204e8149..5bc58a3299ac 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -3274,6 +3274,75 @@ static inline void mpi3mr_init_drv_cmd(struct mpi3mr_drv_cmd *cmdptr, cmdptr->host_tag = host_tag; } +/** + * osintfc_mrioc_security_status -Check controller secure status + * @pdev: PCI device instance + * + * Read the Device Serial Number capability from PCI config + * space and decide whether the controller is secure or not. + * + * Return: 0 on success, non-zero on failure. + */ +static int +osintfc_mrioc_security_status(struct pci_dev *pdev) +{ + u32 cap_data; + int base; + u32 ctlr_status; + u32 debug_status; + int retval = 0; + + base = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_DSN); + if (!base) { + dev_err(&pdev->dev, + "%s: PCI_EXT_CAP_ID_DSN is not supported\n", __func__); + return -1; + } + + pci_read_config_dword(pdev, base + 4, &cap_data); + + debug_status = cap_data & MPI3MR_CTLR_SECURE_DBG_STATUS_MASK; + ctlr_status = cap_data & MPI3MR_CTLR_SECURITY_STATUS_MASK; + + switch (ctlr_status) { + case MPI3MR_INVALID_DEVICE: + dev_err(&pdev->dev, + "%s: Non secure ctlr (Invalid) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n", + __func__, pdev->device, pdev->subsystem_vendor, + pdev->subsystem_device); + retval = -1; + break; + case MPI3MR_CONFIG_SECURE_DEVICE: + if (!debug_status) + dev_info(&pdev->dev, + "%s: Config secure ctlr is detected\n", + __func__); + break; + case MPI3MR_HARD_SECURE_DEVICE: + break; + case MPI3MR_TAMPERED_DEVICE: + dev_err(&pdev->dev, + "%s: Non secure ctlr (Tampered) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n", + __func__, pdev->device, pdev->subsystem_vendor, + pdev->subsystem_device); + retval = -1; + break; + default: + retval = -1; + break; + } + + if (!retval && debug_status) { + dev_err(&pdev->dev, + "%s: Non secure ctlr (Secure Dbg) is detected: DID: 0x%x: SVID: 0x%x: SDID: 0x%x\n", + __func__, pdev->device, pdev->subsystem_vendor, + pdev->subsystem_device); + retval = -1; + } + + return retval; +} + /** * mpi3mr_probe - PCI probe callback * @pdev: PCI device instance @@ -3296,6 +3365,11 @@ mpi3mr_probe(struct pci_dev *pdev, const struct pci_device_id *id) struct Scsi_Host *shost = NULL; int retval = 0, i; + if (osintfc_mrioc_security_status(pdev)) { + warn_non_secure_ctlr = 1; + return 1; /* For Invalid and Tampered device */ + } + shost = scsi_host_alloc(&mpi3mr_driver_template, sizeof(struct mpi3mr_ioc)); if (!shost) { @@ -3412,6 +3486,9 @@ static void mpi3mr_remove(struct pci_dev *pdev) unsigned long flags; struct mpi3mr_tgt_dev *tgtdev, *tgtdev_next; + if (!shost) + return; + mrioc = shost_priv(shost); while (mrioc->reset_in_progress || mrioc->is_driver_loading) ssleep(1); @@ -3532,6 +3609,9 @@ static int mpi3mr_resume(struct pci_dev *pdev) pci_power_t device_state = pdev->current_state; int r; + if (!shost) + return 0; + mrioc = shost_priv(shost); ioc_info(mrioc, "pdev=0x%p, slot=%s, previous operating state [D%d]\n",