[PATCH v2 13/24] EDAC, ghes: Add support for legacy API counters

Robert Richter
2019-06-24T15:09:37Z

The ghes driver is not able yet to count legacy API counters in sysfs,
e.g.:

/sys/devices/system/edac/mc/mc0/csrow2/ce_count
/sys/devices/system/edac/mc/mc0/csrow2/ch0_ce_count
/sys/devices/system/edac/mc/mc0/csrow2/ch1_ce_count

Make counting csrows/channels generic so that the ghes driver can use
it too.

Signed-off-by: Robert Richter <rrichter@marvell.com>
---
drivers/edac/edac_mc.c | 38 +++++++++++++++++++++-----------------
drivers/edac/edac_mc.h | 7 ++++++-
drivers/edac/ghes_edac.c | 2 +-
3 files changed, 28 insertions(+), 19 deletions(-)

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index a8d4471e238c..eea09c6acd3e 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -1007,7 +1007,8 @@ static void edac_ue_error(struct mem_ctl_info *mci,
void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
struct dimm_info *dimm,
- struct edac_raw_error_desc *e)
+ struct edac_raw_error_desc *e,
+ int row, int chan)
{
char detail[80];
u8 grain_bits;
@@ -1046,7 +1047,22 @@ void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
e->label, detail, e->other_detail);
}

+ /* old API's counters */
+ if (dimm) {
+ row = dimm->csrow;
+ chan = dimm->cschannel;
+ }

+ if (mci->csrows && row >= 0) {
+ if (type == HW_EVENT_ERR_CORRECTED) {
+ mci->csrows[row]->ce_count += e->error_count;
+ if (chan >= 0)
+ mci->csrows[row]->channels[chan]->ce_count += e->error_count;
+ } else {
+ mci->csrows[row]->ue_count += e->error_count;
+ }
+ edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
+ }
}
EXPORT_SYMBOL_GPL(edac_raw_mc_handle_error);

@@ -1177,22 +1193,10 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
}
}

- if (!per_layer_report) {
+ if (!per_layer_report)
strcpy(e->label, "any memory");
- } else {
- edac_dbg(4, "csrow/channel to increment: (%d,%d)\n", row, chan);
- if (p == e->label)
- strcpy(e->label, "unknown memory");
- if (type == HW_EVENT_ERR_CORRECTED) {
- if (row >= 0) {
- mci->csrows[row]->ce_count += error_count;
- if (chan >= 0)
- mci->csrows[row]->channels[chan]->ce_count += error_count;
- }
- } else
- if (row >= 0)
- mci->csrows[row]->ue_count += error_count;
- }
+ else if (!*e->label)
+ strcpy(e->label, "unknown memory");

/* Fill the RAM location data */
p = e->location;
@@ -1210,6 +1214,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,

dimm = edac_get_dimm(mci, top_layer, mid_layer, low_layer);

- edac_raw_mc_handle_error(type, mci, dimm, e);
+ edac_raw_mc_handle_error(type, mci, dimm, e, row, chan);
}
EXPORT_SYMBOL_GPL(edac_mc_handle_error);
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index b816cf3caaee..c4ddd5c1e24c 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -216,6 +216,10 @@ extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
* @mci: a struct mem_ctl_info pointer
* @dimm: a struct dimm_info pointer
* @e: error description
+ * @row: csrow hint if there is no dimm info (<0 if
+ * unknown)
+ * @chan: cschannel hint if there is no dimm info (<0 if
+ * unknown)
*
* This raw function is used internally by edac_mc_handle_error(). It should
* only be called directly when the hardware error come directly from BIOS,
@@ -224,7 +228,8 @@ extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
struct dimm_info *dimm,
- struct edac_raw_error_desc *e);
+ struct edac_raw_error_desc *e,
+ int row, int chan);

/**
* edac_mc_handle_error() - Reports a memory event to userspace.
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 746083876b5f..8063996a311d 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -434,7 +434,7 @@ void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)

dimm_info = edac_get_dimm_by_index(mci, e->top_layer);

- edac_raw_mc_handle_error(type, mci, dimm_info, e);
+ edac_raw_mc_handle_error(type, mci, dimm_info, e, -1, -1);

spin_unlock_irqrestore(&ghes_lock, flags);
}
--
2.20.1