From patchwork Sun Jan 12 22:43:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 11329371 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 35D0B139A for ; Sun, 12 Jan 2020 22:46:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E3A024676 for ; Sun, 12 Jan 2020 22:46:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727323AbgALWq1 (ORCPT ); Sun, 12 Jan 2020 17:46:27 -0500 Received: from mga18.intel.com ([134.134.136.126]:34750 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387500AbgALWqJ (ORCPT ); Sun, 12 Jan 2020 17:46:09 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Jan 2020 14:46:06 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,426,1571727600"; d="scan'208";a="396989488" Received: from skuppusw-desk.jf.intel.com ([10.54.74.33]) by orsmga005.jf.intel.com with ESMTP; 12 Jan 2020 14:46:05 -0800 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, sathyanarayanan.kuppuswamy@linux.intel.com Subject: [PATCH v12 0/8] Add Error Disconnect Recover (EDR) support Date: Sun, 12 Jan 2020 14:43:54 -0800 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 v11: * Allowed error recovery to proceed after successful reset_link(). * Used correct ACPI handle for sending EDR status. * Rebased on top of v5.5-rc5 Changes since v10: * Added "edr_enabled" member to dpc priv structure, which is used to cache EDR enabling status based on status of pcie_ports_dpc_native and FF mode. * Changed type of _DSM argument from Integer to Package in acpi_enable_dpc_port() function to fix ACPI related boot warnings. * Rebased on top of v5.5-rc3 Changes since v9: * Removed caching of pcie_aer_get_firmware_first() in dpc driver. * Added proper spec reference in git log for patch 5 & 7. * Added new function parameter "ff_check" to pci_cleanup_aer_uncorrect_error_status(), pci_aer_clear_fatal_status() and pci_cleanup_aer_error_status_regs() functions. * Rebased on top of v5.4-rc5 Changes since v8: * Rebased on top of v5.4-rc1 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 Documentation/PCI/pcieaer-howto.rst | 2 +- drivers/acpi/pci_root.c | 9 + drivers/net/ethernet/intel/ice/ice_main.c | 2 +- drivers/ntb/hw/idt/ntb_hw_idt.c | 2 +- drivers/pci/pci-acpi.c | 98 ++++++++++ drivers/pci/pci.c | 2 +- drivers/pci/pci.h | 2 +- drivers/pci/pcie/Kconfig | 10 + drivers/pci/pcie/aer.c | 16 +- drivers/pci/pcie/dpc.c | 217 ++++++++++++++++++++-- drivers/pci/pcie/err.c | 10 +- drivers/pci/pcie/portdrv_core.c | 7 +- drivers/pci/probe.c | 1 + drivers/scsi/lpfc/lpfc_attr.c | 2 +- include/linux/acpi.h | 6 +- include/linux/aer.h | 12 +- include/linux/pci-acpi.h | 11 ++ include/linux/pci.h | 3 +- 18 files changed, 366 insertions(+), 46 deletions(-)