From patchwork Wed Mar 4 02:36:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 11419161 X-Patchwork-Delegate: bhelgaas@google.com 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 184881580 for ; Wed, 4 Mar 2020 02:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EEA8824655 for ; Wed, 4 Mar 2020 02:39:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387589AbgCDCjm (ORCPT ); Tue, 3 Mar 2020 21:39:42 -0500 Received: from mga12.intel.com ([192.55.52.136]:44650 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387400AbgCDCjI (ORCPT ); Tue, 3 Mar 2020 21:39:08 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Mar 2020 18:39:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,511,1574150400"; d="scan'208";a="233866895" Received: from skuppusw-desk.jf.intel.com ([10.7.201.16]) by orsmga008.jf.intel.com with ESMTP; 03 Mar 2020 18:39:06 -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 v17 03/12] PCI/ERR: Remove service dependency in pcie_do_recovery() Date: Tue, 3 Mar 2020 18:36:26 -0800 Message-Id: <152c530a3ca8780ae85c2325f97f5f35f5d3602f.1583286655.git.sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: 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 Currently we pass PCIe service type parameter to pcie_do_recovery() function which was in-turn used by reset_link() function to identify the underlying pci_port_service_driver and then initiate the driver specific reset_link call. Instead of using this roundabout way, we can just pass the driver specific reset_link callback function when calling pcie_do_recovery() function. This change will also enable non PCIe service driver to call pcie_do_recovery() function. This is required for adding Error Disconnect Recover (EDR) support. Signed-off-by: Kuppuswamy Sathyanarayanan --- drivers/pci/pci.h | 2 +- drivers/pci/pcie/aer.c | 11 +++++------ drivers/pci/pcie/dpc.c | 2 +- drivers/pci/pcie/err.c | 16 ++++++++-------- 4 files changed, 15 insertions(+), 16 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index a4c360515a69..2962200bfe35 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -548,7 +548,7 @@ static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev) /* PCI error reporting and recovery */ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, - u32 service); + pci_ers_result_t (*reset_cb)(struct pci_dev *pdev)); bool pcie_wait_for_link(struct pci_dev *pdev, bool active); #ifdef CONFIG_PCIEASPM diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 4a818b07a1af..1235eca0a2e6 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -102,6 +102,7 @@ struct aer_stats { #define ERR_UNCOR_ID(d) (d >> 16) static int pcie_aer_disable; +static pci_ers_result_t aer_root_reset(struct pci_dev *dev); void pci_no_aer(void) { @@ -1053,11 +1054,9 @@ static void handle_error_source(struct pci_dev *dev, struct aer_err_info *info) info->status); pci_aer_clear_device_status(dev); } else if (info->severity == AER_NONFATAL) - pcie_do_recovery(dev, pci_channel_io_normal, - PCIE_PORT_SERVICE_AER); + pcie_do_recovery(dev, pci_channel_io_normal, aer_root_reset); else if (info->severity == AER_FATAL) - pcie_do_recovery(dev, pci_channel_io_frozen, - PCIE_PORT_SERVICE_AER); + pcie_do_recovery(dev, pci_channel_io_frozen, aer_root_reset); pci_dev_put(dev); } @@ -1094,10 +1093,10 @@ static void aer_recover_work_func(struct work_struct *work) cper_print_aer(pdev, entry.severity, entry.regs); if (entry.severity == AER_NONFATAL) pcie_do_recovery(pdev, pci_channel_io_normal, - PCIE_PORT_SERVICE_AER); + aer_root_reset); else if (entry.severity == AER_FATAL) pcie_do_recovery(pdev, pci_channel_io_frozen, - PCIE_PORT_SERVICE_AER); + aer_root_reset); pci_dev_put(pdev); } } diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index 6b116d7fdb89..114358d62ddf 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -227,7 +227,7 @@ static irqreturn_t dpc_handler(int irq, void *context) } /* We configure DPC so it only triggers on ERR_FATAL */ - pcie_do_recovery(pdev, pci_channel_io_frozen, PCIE_PORT_SERVICE_DPC); + pcie_do_recovery(pdev, pci_channel_io_frozen, dpc_reset_link); return IRQ_HANDLED; } diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index eefefe03857a..05f87bc9d011 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -162,14 +162,13 @@ static pci_ers_result_t default_reset_link(struct pci_dev *dev) return rc ? PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_RECOVERED; } -static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service) +static pci_ers_result_t reset_link(struct pci_dev *dev, + pci_ers_result_t (*reset_cb)(struct pci_dev *pdev)) { pci_ers_result_t status; - struct pcie_port_service_driver *driver = NULL; - driver = pcie_port_find_service(dev, service); - if (driver && driver->reset_link) { - status = driver->reset_link(dev); + if (reset_cb) { + status = reset_cb(dev); } else if (pcie_downstream_port(dev)) { status = default_reset_link(dev); } else { @@ -187,8 +186,9 @@ static pci_ers_result_t reset_link(struct pci_dev *dev, u32 service) return status; } -void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, - u32 service) +void pcie_do_recovery(struct pci_dev *dev, + enum pci_channel_state state, + pci_ers_result_t (*reset_cb)(struct pci_dev *pdev)) { pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER; struct pci_bus *bus; @@ -209,7 +209,7 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, pci_walk_bus(bus, report_normal_detected, &status); if (state == pci_channel_io_frozen) { - status = reset_link(dev, service); + status = reset_link(dev, reset_cb); if (status != PCI_ERS_RESULT_RECOVERED) goto failed; }