From patchwork Thu Sep 23 17:26:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Widawsky X-Patchwork-Id: 1531874 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4HFj2R66d4z9sRK for ; Fri, 24 Sep 2021 03:34:07 +1000 (AEST) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4HFj2R5HR4z3dtc for ; Fri, 24 Sep 2021 03:34:07 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=intel.com (client-ip=192.55.52.120; helo=mga04.intel.com; envelope-from=ben.widawsky@intel.com; receiver=) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4HFhxs60Wfz2yb1 for ; Fri, 24 Sep 2021 03:30:09 +1000 (AEST) X-IronPort-AV: E=McAfee;i="6200,9189,10116"; a="222014582" X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="222014582" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 10:26:58 -0700 X-IronPort-AV: E=Sophos;i="5.85,316,1624345200"; d="scan'208";a="704832583" Received: from unknown (HELO bad-guy.kumite) ([10.252.132.140]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2021 10:26:57 -0700 From: Ben Widawsky To: linux-cxl@vger.kernel.org Subject: [PATCH v2 9/9] iommu/vt-d: Use pci core's DVSEC functionality Date: Thu, 23 Sep 2021 10:26:47 -0700 Message-Id: <20210923172647.72738-10-ben.widawsky@intel.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210923172647.72738-1-ben.widawsky@intel.com> References: <20210923172647.72738-1-ben.widawsky@intel.com> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ben Widawsky , Andrew Donnellan , linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, Bjorn Helgaas , "David E. Box" , Frederic Barrat , Kan Liang , David Woodhouse , Lu Baolu Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Reduce maintenance burden of DVSEC query implementation by using the centralized PCI core implementation. Cc: iommu@lists.linux-foundation.org Cc: David Woodhouse Cc: Lu Baolu Signed-off-by: Ben Widawsky --- drivers/iommu/intel/iommu.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index d75f59ae28e6..30c97181f0ae 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -5398,20 +5398,7 @@ static int intel_iommu_disable_sva(struct device *dev) */ static int siov_find_pci_dvsec(struct pci_dev *pdev) { - int pos; - u16 vendor, id; - - pos = pci_find_next_ext_capability(pdev, 0, 0x23); - while (pos) { - pci_read_config_word(pdev, pos + 4, &vendor); - pci_read_config_word(pdev, pos + 8, &id); - if (vendor == PCI_VENDOR_ID_INTEL && id == 5) - return pos; - - pos = pci_find_next_ext_capability(pdev, pos, 0x23); - } - - return 0; + return pci_find_dvsec_capability(pdev, PCI_VENDOR_ID_INTEL, 5); } static bool