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Message-Id: <55d0c9167fc30dcb6458467d01f657d74499b00c.1351705248.git.mchehab@redhat.com>
Date: Wed, 31 Oct 2012 15:44:54 -0200
From: Mauro Carvalho Chehab <mchehab@...hat.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Mauro Carvalho Chehab <mchehab@...hat.com>,
Linux Edac Mailing List <linux-edac@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [RFC EDAC/GHES 2/3] edac: add support for raw error reports
That allows APEI GHES driver to report errors directly, using
the EDAC error report API.
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
---
drivers/edac/edac_core.h | 17 ++++++++
drivers/edac/edac_mc.c | 109 +++++++++++++++++++++++++++++++++++------------
2 files changed, 99 insertions(+), 27 deletions(-)
diff --git a/drivers/edac/edac_core.h b/drivers/edac/edac_core.h
index db30694..d936958 100644
--- a/drivers/edac/edac_core.h
+++ b/drivers/edac/edac_core.h
@@ -453,6 +453,23 @@ extern struct mem_ctl_info *find_mci_by_dev(struct device *dev);
extern struct mem_ctl_info *edac_mc_del_mc(struct device *dev);
extern int edac_mc_find_csrow_by_page(struct mem_ctl_info *mci,
unsigned long page);
+
+void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
+ struct mem_ctl_info *mci,
+ long grain,
+ const u16 error_count,
+ const int top_layer,
+ const int mid_layer,
+ const int low_layer,
+ const unsigned long page_frame_number,
+ const unsigned long offset_in_page,
+ const unsigned long syndrome,
+ const char *msg,
+ const char *location,
+ const char *label,
+ const char *other_detail,
+ const bool enable_per_layer_report);
+
void edac_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
const u16 error_count,
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index d4d891a..d3e9341 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -1079,6 +1079,81 @@ static void edac_ue_error(struct mem_ctl_info *mci,
#define OTHER_LABEL " or "
/**
+ * edac_raw_mc_handle_error - reports a memory event to userspace without doing
+ * anything to discover the error location
+ *
+ * @type: severity of the error (CE/UE/Fatal)
+ * @mci: a struct mem_ctl_info pointer
+ * @grain: error granularity
+ * @error_count: Number of errors of the same type
+ * @top_layer: Memory layer[0] position
+ * @mid_layer: Memory layer[1] position
+ * @low_layer: Memory layer[2] position
+ * @page_frame_number: mem page where the error occurred
+ * @offset_in_page: offset of the error inside the page
+ * @syndrome: ECC syndrome
+ * @msg: Message meaningful to the end users that
+ * explains the event\
+ * @location: location of the error, like "csrow:0 channel:1"
+ * @label: DIMM labels for the affected memory(ies)
+ * @other_detail: Technical details about the event that
+ * may help hardware manufacturers and
+ * EDAC developers to analyse the event
+ * @enable_per_layer_report: should it increment per-layer error counts?
+ *
+ * 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,
+ * like in the case of APEI GHES driver.
+ */
+void edac_raw_mc_handle_error(const enum hw_event_mc_err_type type,
+ struct mem_ctl_info *mci,
+ long grain,
+ const u16 error_count,
+ const int top_layer,
+ const int mid_layer,
+ const int low_layer,
+ const unsigned long page_frame_number,
+ const unsigned long offset_in_page,
+ const unsigned long syndrome,
+ const char *msg,
+ const char *location,
+ const char *label,
+ const char *other_detail,
+ const bool enable_per_layer_report)
+{
+ char detail[80];
+ u8 grain_bits;
+ int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer };
+
+ /* Report the error via the trace interface */
+
+ grain_bits = fls_long(grain) + 1;
+ trace_mc_event(type, msg, label, error_count,
+ mci->mc_idx, top_layer, mid_layer, low_layer,
+ PAGES_TO_MiB(page_frame_number) | offset_in_page,
+ grain_bits, syndrome, other_detail);
+
+ /* Memory type dependent details about the error */
+ if (type == HW_EVENT_ERR_CORRECTED) {
+ snprintf(detail, sizeof(detail),
+ "page:0x%lx offset:0x%lx grain:%ld syndrome:0x%lx",
+ page_frame_number, offset_in_page,
+ grain, syndrome);
+ edac_ce_error(mci, error_count, pos, msg, location, label,
+ detail, other_detail, enable_per_layer_report,
+ page_frame_number, offset_in_page, grain);
+ } else {
+ snprintf(detail, sizeof(detail),
+ "page:0x%lx offset:0x%lx grain:%ld",
+ page_frame_number, offset_in_page, grain);
+
+ edac_ue_error(mci, error_count, pos, msg, location, label,
+ detail, other_detail, enable_per_layer_report);
+ }
+}
+EXPORT_SYMBOL_GPL(edac_raw_mc_handle_error);
+
+/**
* edac_mc_handle_error - reports a memory event to userspace
*
* @type: severity of the error (CE/UE/Fatal)
@@ -1109,7 +1184,7 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
const char *other_detail)
{
/* FIXME: too much for stack: move it to some pre-alocated area */
- char detail[80], location[80];
+ char location[80];
char label[(EDAC_MC_LABEL_LEN + 1 + sizeof(OTHER_LABEL)) * mci->tot_dimms];
char *p;
int row = -1, chan = -1;
@@ -1117,7 +1192,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
int i;
long grain;
bool enable_per_layer_report = false;
- u8 grain_bits;
edac_dbg(3, "MC%d\n", mci->mc_idx);
@@ -1242,30 +1316,11 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
if (p > location)
*(p - 1) = '\0';
- /* Report the error via the trace interface */
-
- grain_bits = fls_long(grain) + 1;
- trace_mc_event(type, msg, label, error_count,
- mci->mc_idx, top_layer, mid_layer, low_layer,
- PAGES_TO_MiB(page_frame_number) | offset_in_page,
- grain_bits, syndrome, other_detail);
-
- /* Memory type dependent details about the error */
- if (type == HW_EVENT_ERR_CORRECTED) {
- snprintf(detail, sizeof(detail),
- "page:0x%lx offset:0x%lx grain:%ld syndrome:0x%lx",
- page_frame_number, offset_in_page,
- grain, syndrome);
- edac_ce_error(mci, error_count, pos, msg, location, label,
- detail, other_detail, enable_per_layer_report,
- page_frame_number, offset_in_page, grain);
- } else {
- snprintf(detail, sizeof(detail),
- "page:0x%lx offset:0x%lx grain:%ld",
- page_frame_number, offset_in_page, grain);
-
- edac_ue_error(mci, error_count, pos, msg, location, label,
- detail, other_detail, enable_per_layer_report);
- }
+ edac_raw_mc_handle_error(type, mci, grain, error_count,
+ top_layer, mid_layer, low_layer,
+ page_frame_number, offset_in_page,
+ syndrome,
+ msg, location, label, other_detail,
+ enable_per_layer_report);
}
EXPORT_SYMBOL_GPL(edac_mc_handle_error);
--
1.7.11.7
--
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