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PCI/AER: Add sysfs attributes for rootport cumulative stats

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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>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rajat Jain
2018-06-21 16:48:29 -07:00
committed by Bjorn Helgaas
parent 81aa5206f9
commit 12833017e5
2 changed files with 75 additions and 0 deletions
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47
drivers/pci/pcie/aer.c
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@@ -577,10 +577,30 @@ aer_stats_dev_attr(aer_dev_nonfatal, dev_nonfatal_errs,
aer_uncorrectable_error_string, "ERR_NONFATAL",
dev_total_nonfatal_errs);
#define aer_stats_rootport_attr(name, field) \
static ssize_t \
name##_show(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
struct pci_dev *pdev = to_pci_dev(dev); \
return sprintf(buf, "%llu\n", pdev->aer_stats->field); \
} \
static DEVICE_ATTR_RO(name)
aer_stats_rootport_attr(aer_rootport_total_err_cor,
rootport_total_cor_errs);
aer_stats_rootport_attr(aer_rootport_total_err_fatal,
rootport_total_fatal_errs);
aer_stats_rootport_attr(aer_rootport_total_err_nonfatal,
rootport_total_nonfatal_errs);
static struct attribute *aer_stats_attrs[] __ro_after_init = {
&dev_attr_aer_dev_correctable.attr,
&dev_attr_aer_dev_fatal.attr,
&dev_attr_aer_dev_nonfatal.attr,
&dev_attr_aer_rootport_total_err_cor.attr,
&dev_attr_aer_rootport_total_err_fatal.attr,
&dev_attr_aer_rootport_total_err_nonfatal.attr,
NULL
};
@@ -593,6 +613,12 @@ static umode_t aer_stats_attrs_are_visible(struct kobject *kobj,
if (!pdev->aer_stats)
return 0;
if ((a == &dev_attr_aer_rootport_total_err_cor.attr ||
a == &dev_attr_aer_rootport_total_err_fatal.attr ||
a == &dev_attr_aer_rootport_total_err_nonfatal.attr) &&
pci_pcie_type(pdev) != PCI_EXP_TYPE_ROOT_PORT)
return 0;
return a->mode;
}
@@ -635,6 +661,25 @@ static void pci_dev_aer_stats_incr(struct pci_dev *pdev,
counter[i]++;
}
static 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++;
}
}
static void __print_tlp_header(struct pci_dev *dev,
struct aer_header_log_regs *t)
{
@@ -1085,6 +1130,8 @@ static void aer_isr_one_error(struct aer_rpc *rpc,
struct pci_dev *pdev = rpc->rpd;
struct aer_err_info *e_info = &rpc->e_info;
pci_rootport_aer_stats_incr(pdev, e_src);
/*
* There is a possibility that both correctable error and
* uncorrectable error being logged. Report correctable error first.