From patchwork Thu May 20 15:25:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kashyap Desai X-Patchwork-Id: 443719 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=-19.0 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, 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 C9BDBC433B4 for ; Thu, 20 May 2021 15:23:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC4CB61244 for ; Thu, 20 May 2021 15:23:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241363AbhETPYa (ORCPT ); Thu, 20 May 2021 11:24:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243408AbhETPXt (ORCPT ); Thu, 20 May 2021 11:23:49 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68797C0613ED for ; Thu, 20 May 2021 08:22:28 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id 69so9264443plc.5 for ; Thu, 20 May 2021 08:22:28 -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=cBGrAymQhSRUS6xxkIbwpbZv0+XoFIw65Qv1zDhko9A=; b=fbX+o/KKc2nFEVjOQD6SQQeCEybZBQIubHXMzPFoSZXihCqKQbI6wGEyQWlebwkH+7 xJVQuCq/fEhcZlZmaM7eovr27Y4LOUgutfHSoHNxc1VN9yaQkbni9198nOjltbhGXUAT AN+1CjVIC0Nx0ObVACW0UqKmbO9ba58DtN9AE= 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=cBGrAymQhSRUS6xxkIbwpbZv0+XoFIw65Qv1zDhko9A=; b=ly2GUP8DMnwxaBrnF3JnJ7N/s6lBkRd2kdNkvVwU4hAi0fEtgTtz71ngjLiEw4VYv4 KOKKGdpan08Qk1Whp0mlyZ/J2rXghGQejLTOuAkTxs6Oi98uZtZidWUUhiF7T+pidHaS Qm0vJHtaU4uK/y691V2qajX6Qe3YQUwiJ4JPzHQwFSFx4ZVll3UQ5wzOI31ugwvChVn6 Sv83JvC06QvenfKTuZcCr5xROocbDFahLZ8WjOM0w/L+cYPCU3hIh7qgIaGPb4J9nyXA 6vbhLH+upDnUlGVyBGms6xrrEymvhlrvvyTc1W1fSFYnxZohK2hf0yZO1IWwYau+kSLE Jn0A== X-Gm-Message-State: AOAM533Vv7ASicIT7t+Rmx1INwCER+r9jwFfITy5lLobO1WP00b77fcI VF7g/TjznIp7XDXqkBWPH+fgKY+lTI9cvAmwxcpPrrrGombS9pGno0u/mr2lOMn9H8+GHjt/D3g cdNW48CPvFQfa69aSLiCOcp1v/xn22pSTpj1CZlexENYOrbR8tbhC1sWy3MVK1D2BhN3UIDT+KQ zn92L9XA== X-Google-Smtp-Source: ABdhPJyQ+Oz+VGdsfoUv6jHt1+5CXVsLadMZRFrBqSKmm9cIocs7x0gS96TTwf7sZPrhA87SXGwWyQ== X-Received: by 2002:a17:902:6501:b029:ef:8518:a25a with SMTP id b1-20020a1709026501b02900ef8518a25amr6594409plk.64.1621524147510; Thu, 20 May 2021 08:22:27 -0700 (PDT) Received: from drv-bst-rhel8.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id s8sm2250557pfe.112.2021.05.20.08.22.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 May 2021 08:22:26 -0700 (PDT) From: Kashyap Desai To: linux-scsi@vger.kernel.org Cc: jejb@linux.ibm.com, martin.petersen@oracle.com, steve.hagan@broadcom.com, peter.rivera@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, Kashyap Desai , sathya.prakash@broadcom.com Subject: [PATCH v6 22/24] mpi3mr: add support of DSN secure fw check Date: Thu, 20 May 2021 20:55:43 +0530 Message-Id: <20210520152545.2710479-23-kashyap.desai@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210520152545.2710479-1-kashyap.desai@broadcom.com> References: <20210520152545.2710479-1-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 Reviewed-by: Tomas Henzl Reviewed-by: Himanshu Madhani Cc: sathya.prakash@broadcom.com --- 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 372ce0e..e7505b4 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -154,6 +154,15 @@ 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 dd71cdc..6400ca5 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_os.c +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c @@ -3188,6 +3188,75 @@ 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 @@ -3210,6 +3279,11 @@ 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) { @@ -3326,6 +3400,9 @@ 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); @@ -3444,6 +3521,9 @@ 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",