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Wed, 23 May 2018 10:58:46 -0700 (PDT) From: Rajat Jain To: Bjorn Helgaas , Jonathan Corbet , Philippe Ombredanne , Kate Stewart , Thomas Gleixner , Greg Kroah-Hartman , Rajat Jain , Frederick Lawler , Oza Pawandeep , Keith Busch , Gabriele Paoloni , Alexandru Gagniuc , Thomas Tai , "Steven Rostedt (VMware)" , linux-pci@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Jes Sorensen , Kyle McMartin Cc: rajatxjain@gmail.com Subject: [PATCH v2 2/5] PCI/AER: Add sysfs stats for AER capable devices Date: Wed, 23 May 2018 10:58:05 -0700 Message-Id: <20180523175808.28030-3-rajatja@google.com> X-Mailer: git-send-email 2.17.0.441.gb46fe60e1d-goog In-Reply-To: <20180523175808.28030-1-rajatja@google.com> References: <20180522222805.80314-1-rajatja@google.com> <20180523175808.28030-1-rajatja@google.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the following AER sysfs stats to represent the counters for each kind of error as seen by the device: dev_total_cor_errs dev_total_fatal_errs dev_total_nonfatal_errs Signed-off-by: Rajat Jain --- v2: Use tabs instead of spaces at the end of macro lines, and remove the use of unlikely() as per Greg's suggestion. drivers/pci/pci-sysfs.c | 3 ++ drivers/pci/pci.h | 4 +- drivers/pci/pcie/aer/aerdrv.h | 1 + drivers/pci/pcie/aer/aerdrv_errprint.c | 1 + drivers/pci/pcie/aer/aerdrv_stats.c | 72 ++++++++++++++++++++++++++ 5 files changed, 80 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 366d93af051d..730f985a3dc9 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1743,6 +1743,9 @@ static const struct attribute_group *pci_dev_attr_groups[] = { #endif &pci_bridge_attr_group, &pcie_dev_attr_group, +#ifdef CONFIG_PCIEAER + &aer_stats_attr_group, +#endif NULL, }; diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index c358e7a07f3f..9a28ec600225 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -181,7 +181,9 @@ extern const struct attribute_group *pci_dev_groups[]; extern const struct attribute_group *pcibus_groups[]; extern const struct device_type pci_dev_type; extern const struct attribute_group *pci_bus_groups[]; - +#ifdef CONFIG_PCIEAER +extern const struct attribute_group aer_stats_attr_group; +#endif /** * pci_match_one_device - Tell if a PCI device structure has a matching diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h index d8b9fba536ed..b5d5ad6f2c03 100644 --- a/drivers/pci/pcie/aer/aerdrv.h +++ b/drivers/pci/pcie/aer/aerdrv.h @@ -87,6 +87,7 @@ void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info); irqreturn_t aer_irq(int irq, void *context); int pci_aer_stats_init(struct pci_dev *pdev); void pci_aer_stats_exit(struct pci_dev *pdev); +void pci_dev_aer_stats_incr(struct pci_dev *pdev, struct aer_err_info *info); #ifdef CONFIG_ACPI_APEI int pcie_aer_get_firmware_first(struct pci_dev *pci_dev); diff --git a/drivers/pci/pcie/aer/aerdrv_errprint.c b/drivers/pci/pcie/aer/aerdrv_errprint.c index 21ca5e1b0ded..5e8b98deda08 100644 --- a/drivers/pci/pcie/aer/aerdrv_errprint.c +++ b/drivers/pci/pcie/aer/aerdrv_errprint.c @@ -155,6 +155,7 @@ static void __aer_print_error(struct pci_dev *dev, pci_err(dev, " [%2d] Unknown Error Bit%s\n", i, info->first_error == i ? " (First)" : ""); } + pci_dev_aer_stats_incr(dev, info); } void aer_print_error(struct pci_dev *dev, struct aer_err_info *info) diff --git a/drivers/pci/pcie/aer/aerdrv_stats.c b/drivers/pci/pcie/aer/aerdrv_stats.c index 2f48d6bc81f1..5555beffef2b 100644 --- a/drivers/pci/pcie/aer/aerdrv_stats.c +++ b/drivers/pci/pcie/aer/aerdrv_stats.c @@ -44,6 +44,78 @@ struct aer_stats { u64 rootport_total_nonfatal_errs; }; +#define aer_stats_aggregate_attr(field) \ + static ssize_t \ + field##_show(struct device *dev, struct device_attribute *attr, \ + char *buf) \ +{ \ + struct pci_dev *pdev = to_pci_dev(dev); \ + return sprintf(buf, "0x%llx\n", pdev->aer_stats->field); \ +} \ +static DEVICE_ATTR_RO(field) + +aer_stats_aggregate_attr(dev_total_cor_errs); +aer_stats_aggregate_attr(dev_total_fatal_errs); +aer_stats_aggregate_attr(dev_total_nonfatal_errs); + +static struct attribute *aer_stats_attrs[] __ro_after_init = { + &dev_attr_dev_total_cor_errs.attr, + &dev_attr_dev_total_fatal_errs.attr, + &dev_attr_dev_total_nonfatal_errs.attr, + NULL +}; + +static umode_t aer_stats_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (!pdev->aer_stats) + return 0; + + return a->mode; +} + +const struct attribute_group aer_stats_attr_group = { + .name = "aer_stats", + .attrs = aer_stats_attrs, + .is_visible = aer_stats_attrs_are_visible, +}; + +void pci_dev_aer_stats_incr(struct pci_dev *pdev, struct aer_err_info *info) +{ + int status, i, max = -1; + u64 *counter = NULL; + struct aer_stats *aer_stats = pdev->aer_stats; + + if (!aer_stats) + return; + + switch (info->severity) { + case AER_CORRECTABLE: + aer_stats->dev_total_cor_errs++; + counter = &aer_stats->dev_cor_errs[0]; + max = AER_MAX_TYPEOF_CORRECTABLE_ERRS; + break; + case AER_NONFATAL: + aer_stats->dev_total_nonfatal_errs++; + counter = &aer_stats->dev_uncor_errs[0]; + max = AER_MAX_TYPEOF_UNCORRECTABLE_ERRS; + break; + case AER_FATAL: + aer_stats->dev_total_fatal_errs++; + counter = &aer_stats->dev_uncor_errs[0]; + max = AER_MAX_TYPEOF_UNCORRECTABLE_ERRS; + break; + } + + status = (info->status & ~info->mask); + for (i = 0; i < max; i++) + if (status & (1 << i)) + counter[i]++; +} + int pci_aer_stats_init(struct pci_dev *pdev) { pdev->aer_stats = kzalloc(sizeof(struct aer_stats), GFP_KERNEL);