From patchwork Mon Dec 3 18:33:12 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lance Ortiz X-Patchwork-Id: 203417 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id CA93F2C0316 for ; Tue, 4 Dec 2012 05:38:55 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751901Ab2LCSiZ (ORCPT ); Mon, 3 Dec 2012 13:38:25 -0500 Received: from g5t0008.atlanta.hp.com ([15.192.0.45]:46564 "EHLO g5t0008.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751661Ab2LCSiW (ORCPT ); Mon, 3 Dec 2012 13:38:22 -0500 Received: from g5t0030.atlanta.hp.com (g5t0030.atlanta.hp.com [16.228.8.142]) by g5t0008.atlanta.hp.com (Postfix) with ESMTP id F166C240D3; Mon, 3 Dec 2012 18:38:21 +0000 (UTC) Received: from grignak.americas.hpqcorp.net (grignak.americas.hpqcorp.net [16.71.13.117]) by g5t0030.atlanta.hp.com (Postfix) with ESMTP id E48921404D; Mon, 3 Dec 2012 18:38:19 +0000 (UTC) From: Lance Ortiz Subject: [PATCH v4 2/3] aerdrv: Enhanced AER logging To: bhelgaas@google.com, lance_ortiz@hotmail.com, jiang.liu@huawei.com, tony.luck@intel.com, bp@alien8.de, rostedt@goodmis.org, mchehab@redhat.com, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 03 Dec 2012 11:33:12 -0700 Message-ID: <20121203183312.26636.61979.stgit@grignak.americas.hpqcorp.net> In-Reply-To: <20121203183305.26636.22979.stgit@grignak.americas.hpqcorp.net> References: <20121203183305.26636.22979.stgit@grignak.americas.hpqcorp.net> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org This patch will provide a more reliable and easy way for user-space applications to have access to AER logs rather than reading them from the message buffer. It also provides a way to notify user-space when an AER event occurs. The aer driver is updated to generate a trace event of function 'aer_event' when a PCIe error is reported over the AER interface. The trace event was added to both the interrupt based aer path and the firmware first path. v1-v2 fix compile errors in ifdefs. v2-v3 Update to new location of trace header. Update print to remove warning. v3-v4 Reworked logic when getting ready to call cper_print_aer Signed-off-by: Lance Ortiz --- drivers/acpi/apei/cper.c | 19 ++++++++++++++++--- drivers/pci/pcie/aer/aerdrv_errprint.c | 10 +++++++++- include/linux/aer.h | 2 +- 3 files changed, 26 insertions(+), 5 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c index e6defd8..4a3e945 100644 --- a/drivers/acpi/apei/cper.c +++ b/drivers/acpi/apei/cper.c @@ -29,6 +29,7 @@ #include #include #include +#include #include /* @@ -249,6 +250,10 @@ static const char *cper_pcie_port_type_strs[] = { static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, const struct acpi_hest_generic_data *gdata) { +#ifdef CONFIG_ACPI_APEI_PCIEAER + struct pci_dev *dev; +#endif + if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE) printk("%s""port_type: %d, %s\n", pfx, pcie->port_type, pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ? @@ -281,10 +286,18 @@ static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n", pfx, pcie->bridge.secondary_status, pcie->bridge.control); #ifdef CONFIG_ACPI_APEI_PCIEAER - if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) { - struct aer_capability_regs *aer_regs = (void *)pcie->aer_info; - cper_print_aer(pfx, gdata->error_severity, aer_regs); + dev = pci_get_domain_bus_and_slot(pcie->device_id.segment, + pcie->device_id.bus, pcie->device_id.function); + if (!dev) { + pr_info("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n", + pcie->device_id.segment, pcie->device_id.bus, + pcie->device_id.slot, pcie->device_id.function); + return; } + if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) + cper_print_aer(dev, gdata->error_severity, + (struct aer_capability_regs *) pcie->aer_info); + pci_dev_put(dev); #endif } diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c index 3ea5173..34d96e4 100644 --- a/drivers/pci/pcie/aer/aerdrv_errprint.c +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -23,6 +23,9 @@ #include "aerdrv.h" +#define CREATE_TRACE_POINTS +#include + #define AER_AGENT_RECEIVER 0 #define AER_AGENT_REQUESTER 1 #define AER_AGENT_COMPLETER 2 @@ -194,6 +197,8 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info) if (info->id && info->error_dev_num > 1 && info->id == id) printk("%s"" Error of this Agent(%04x) is reported first\n", prefix, id); + trace_aer_event(dev_name(&dev->dev), (info->status & ~info->mask), + info->severity); } void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info) @@ -217,12 +222,13 @@ int cper_severity_to_aer(int cper_severity) } EXPORT_SYMBOL_GPL(cper_severity_to_aer); -void cper_print_aer(const char *prefix, int cper_severity, +void cper_print_aer(struct pci_dev *dev, int cper_severity, struct aer_capability_regs *aer) { int aer_severity, layer, agent, status_strs_size, tlp_header_valid = 0; u32 status, mask; const char **status_strs; + char *prefix = NULL; aer_severity = cper_severity_to_aer(cper_severity); if (aer_severity == AER_CORRECTABLE) { @@ -259,5 +265,7 @@ void cper_print_aer(const char *prefix, int cper_severity, *(tlp + 8), *(tlp + 15), *(tlp + 14), *(tlp + 13), *(tlp + 12)); } + trace_aer_event(dev_name(&dev->dev), (status & ~mask), + aer_severity); } #endif diff --git a/include/linux/aer.h b/include/linux/aer.h index 544abdb..7b86dc6 100644 --- a/include/linux/aer.h +++ b/include/linux/aer.h @@ -49,7 +49,7 @@ static inline int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev) } #endif -extern void cper_print_aer(const char *prefix, int cper_severity, +extern void cper_print_aer(struct pci_dev *dev, int cper_severity, struct aer_capability_regs *aer); extern int cper_severity_to_aer(int cper_severity); extern void aer_recover_queue(int domain, unsigned int bus, unsigned int devfn,