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Subject[PATCH v2 4/5] PCI/AER: Add sysfs attributes for rootport cumulative stats
Date
Add sysfs attributes for rootport statistics (that are cumulative
of all the ERR_* messages seen on this PCI hierarchy).

Signed-off-by: Rajat Jain <rajatja@google.com>
---
v2: same as v1

drivers/pci/pcie/aer/aerdrv.h | 2 ++
drivers/pci/pcie/aer/aerdrv_core.c | 2 ++
drivers/pci/pcie/aer/aerdrv_stats.c | 31 +++++++++++++++++++++++++++++
3 files changed, 35 insertions(+)

diff --git a/drivers/pci/pcie/aer/aerdrv.h b/drivers/pci/pcie/aer/aerdrv.h
index 048fbd7c9633..77d8355551d9 100644
--- a/drivers/pci/pcie/aer/aerdrv.h
+++ b/drivers/pci/pcie/aer/aerdrv.h
@@ -88,6 +88,8 @@ 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);
+void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_source *e_src);

extern const char
*aer_correctable_error_string[AER_MAX_TYPEOF_CORRECTABLE_ERRS];
diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 42a6f913069a..0f70e22563f3 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -424,6 +424,8 @@ static void aer_isr_one_error(struct pcie_device *p_device,
struct aer_rpc *rpc = get_service_data(p_device);
struct aer_err_info *e_info = &rpc->e_info;

+ pci_rootport_aer_stats_incr(p_device->port, e_src);
+
/*
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.
diff --git a/drivers/pci/pcie/aer/aerdrv_stats.c b/drivers/pci/pcie/aer/aerdrv_stats.c
index e47321b267f6..898c9bc02ec2 100644
--- a/drivers/pci/pcie/aer/aerdrv_stats.c
+++ b/drivers/pci/pcie/aer/aerdrv_stats.c
@@ -57,6 +57,9 @@ 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);
+aer_stats_aggregate_attr(rootport_total_cor_errs);
+aer_stats_aggregate_attr(rootport_total_fatal_errs);
+aer_stats_aggregate_attr(rootport_total_nonfatal_errs);

#define aer_stats_breakdown_attr(field, stats_array, strings_array) \
static ssize_t \
@@ -90,6 +93,9 @@ static struct attribute *aer_stats_attrs[] __ro_after_init = {
&dev_attr_dev_total_nonfatal_errs.attr,
&dev_attr_dev_breakdown_correctable.attr,
&dev_attr_dev_breakdown_uncorrectable.attr,
+ &dev_attr_rootport_total_cor_errs.attr,
+ &dev_attr_rootport_total_fatal_errs.attr,
+ &dev_attr_rootport_total_nonfatal_errs.attr,
NULL
};

@@ -102,6 +108,12 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
if (!pdev->aer_stats)
return 0;

+ if ((a == &dev_attr_rootport_total_cor_errs.attr ||
+ a == &dev_attr_rootport_total_fatal_errs.attr ||
+ a == &dev_attr_rootport_total_nonfatal_errs.attr) &&
+ pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
+ return 0;
+
return a->mode;
}

@@ -144,6 +156,25 @@ void pci_dev_aer_stats_incr(struct pci_dev *pdev, struct aer_err_info *info)
counter[i]++;
}

+void pci_rootport_aer_stats_incr(struct pci_dev *pdev,
+ struct aer_err_source *e_src)
+{
+ struct aer_stats *aer_stats = pdev->aer_stats;
+
+ if (!aer_stats)
+ return;
+
+ if (e_src->status & PCI_ERR_ROOT_COR_RCV)
+ aer_stats->rootport_total_cor_errs++;
+
+ if (e_src->status & PCI_ERR_ROOT_UNCOR_RCV) {
+ if (e_src->status & PCI_ERR_ROOT_FATAL_RCV)
+ aer_stats->rootport_total_fatal_errs++;
+ else
+ aer_stats->rootport_total_nonfatal_errs++;
+ }
+}
+
int pci_aer_stats_init(struct pci_dev *pdev)
{
pdev->aer_stats = kzalloc(sizeof(struct aer_stats), GFP_KERNEL);
--
2.17.0.441.gb46fe60e1d-goog
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