IB/ipath: Log "active" time and some errors to EEPROM

We currently track various errors, now we enhance that capability by
logging some of them to EEPROM.  We also now log a cumulative "active"
time defined by traffic though the InfiniPath HCA beyond the normal SM
traffic.

Signed-off-by: Michael Albaugh <michael.albaugh@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_sysfs.c b/drivers/infiniband/hw/ipath/ipath_sysfs.c
index 17ec1457172..ab34d3e8b95 100644
--- a/drivers/infiniband/hw/ipath/ipath_sysfs.c
+++ b/drivers/infiniband/hw/ipath/ipath_sysfs.c
@@ -613,6 +613,26 @@ static ssize_t store_led_override(struct device *dev,
         return ret;
 }
 
+static ssize_t show_logged_errs(struct device *dev,
+                                struct device_attribute *attr,
+                                char *buf)
+{
+        struct ipath_devdata *dd = dev_get_drvdata(dev);
+        int idx, count;
+
+        /* force consistency with actual EEPROM */
+        if (ipath_update_eeprom_log(dd) != 0)
+                return -ENXIO;
+
+        count = 0;
+        for (idx = 0; idx < IPATH_EEP_LOG_CNT; ++idx) {
+                count += scnprintf(buf + count, PAGE_SIZE - count, "%d%c",
+                        dd->ipath_eep_st_errs[idx],
+                        idx == (IPATH_EEP_LOG_CNT - 1) ? '\n' : ' ');
+        }
+
+        return count;
+}
 
 static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
 static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);
@@ -643,6 +663,7 @@ static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
 static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
 static DEVICE_ATTR(rx_pol_inv, S_IWUSR, NULL, store_rx_pol_inv);
 static DEVICE_ATTR(led_override, S_IWUSR, NULL, store_led_override);
+static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
 
 static struct attribute *dev_attributes[] = {
         &dev_attr_guid.attr,
@@ -660,6 +681,7 @@ static struct attribute *dev_attributes[] = {
         &dev_attr_enabled.attr,
         &dev_attr_rx_pol_inv.attr,
         &dev_attr_led_override.attr,
+        &dev_attr_logged_errors.attr,
         NULL
 };