From patchwork Tue Aug 27 17:29:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 1153991 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46Hwv05Rxzz9sNk for ; Wed, 28 Aug 2019 03:33:00 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730475AbfH0Rcn (ORCPT ); Tue, 27 Aug 2019 13:32:43 -0400 Received: from mga18.intel.com ([134.134.136.126]:62462 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730448AbfH0Rcn (ORCPT ); Tue, 27 Aug 2019 13:32:43 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Aug 2019 10:32:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,438,1559545200"; d="scan'208";a="171269783" Received: from skuppusw-desk.jf.intel.com ([10.54.74.33]) by orsmga007.jf.intel.com with ESMTP; 27 Aug 2019 10:32:38 -0700 From: sathyanarayanan.kuppuswamy@linux.intel.com To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ashok.raj@intel.com, keith.busch@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: [PATCH v8 0/8] Add Error Disconnect Recover (EDR) support Date: Tue, 27 Aug 2019 10:29:22 -0700 Message-Id: X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Kuppuswamy Sathyanarayanan This patchset adds support for following features: 1. Error Disconnect Recover (EDR) support. 2. _OSC based negotiation support for DPC. You can find EDR spec in the following link. https://members.pcisig.com/wg/PCI-SIG/document/12614 Changes since v7: * Updated DSM version number to match the spec. Changes since v6: * Modified the order of patches to enable EDR only after all necessary support is added in kernel. * Addressed Bjorn comments. Changes since v5: * Addressed Keith's comments. * Added additional check for FF mode in pci_aer_init(). * Updated commit history of "PCI/DPC: Add support for DPC recovery on NON_FATAL errors" patch. Changes since v4: * Rebased on top of v5.3-rc1 * Fixed lock/unlock issue in edr_handle_event(). * Merged "Update error status after reset_link()" patch into this patchset. Changes since v3: * Moved EDR related ACPI functions/definitions to pci-acpi.c * Modified commit history in few patches to include spec reference. * Added support to handle DPC triggered by NON_FATAL errors. * Added edr_lock to protect PCI device receiving duplicate EDR notifications. * Addressed Bjorn comments. Changes since v2: * Split EDR support patch into multiple patches. * Addressed Bjorn comments. Changes since v1: * Rebased on top of v5.1-rc1 Kuppuswamy Sathyanarayanan (8): PCI/ERR: Update error status after reset_link() PCI/DPC: Allow dpc_probe() even if firmware first mode is enabled PCI/DPC: Add dpc_process_error() wrapper function PCI/DPC: Add Error Disconnect Recover (EDR) support PCI/AER: Allow clearing Error Status Register in FF mode PCI/DPC: Update comments related to DPC recovery on NON_FATAL errors PCI/DPC: Clear AER registers in EDR mode PCI/ACPI: Enable EDR support drivers/acpi/pci_root.c | 9 ++ drivers/pci/pci-acpi.c | 91 +++++++++++++++ drivers/pci/pcie/Kconfig | 10 ++ drivers/pci/pcie/aer.c | 12 +- drivers/pci/pcie/dpc.c | 194 +++++++++++++++++++++++++++++--- drivers/pci/pcie/err.c | 10 +- drivers/pci/pcie/portdrv_core.c | 8 +- drivers/pci/probe.c | 1 + include/linux/acpi.h | 6 +- include/linux/pci-acpi.h | 11 ++ include/linux/pci.h | 3 +- 11 files changed, 321 insertions(+), 34 deletions(-)