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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@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2012-10-31 13:46:11 -03:00
parent c7ef764554
commit e7e248304c
2 changed files with 47 additions and 22 deletions
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5
drivers/edac/edac_core.h
View File

@ -453,6 +453,11 @@ 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,
struct edac_raw_error_desc *e);
void edac_mc_handle_error(const enum hw_event_mc_err_type type,
struct mem_ctl_info *mci,
const u16 error_count,

64
drivers/edac/edac_mc.c
View File

@ -1065,6 +1065,46 @@ static void edac_ue_error(struct mem_ctl_info *mci,
edac_inc_ue_error(mci, enable_per_layer_report, pos, error_count);
}
/**
* 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
* @e: error description
*
* 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,
struct edac_raw_error_desc *e)
{
char detail[80];
int pos[EDAC_MAX_LAYERS] = { e->top_layer, e->mid_layer, e->low_layer };
/* 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",
e->page_frame_number, e->offset_in_page,
e->grain, e->syndrome);
edac_ce_error(mci, e->error_count, pos, e->msg, e->location, e->label,
detail, e->other_detail, e->enable_per_layer_report,
e->page_frame_number, e->offset_in_page, e->grain);
} else {
snprintf(detail, sizeof(detail),
"page:0x%lx offset:0x%lx grain:%ld",
e->page_frame_number, e->offset_in_page, e->grain);
edac_ue_error(mci, e->error_count, pos, e->msg, e->location, e->label,
detail, e->other_detail, e->enable_per_layer_report);
}
}
EXPORT_SYMBOL_GPL(edac_raw_mc_handle_error);
/**
* edac_mc_handle_error - reports a memory event to userspace
@ -1096,7 +1136,6 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
const char *msg,
const char *other_detail)
{
char detail[80];
char *p;
int row = -1, chan = -1;
int pos[EDAC_MAX_LAYERS] = { top_layer, mid_layer, low_layer };
@ -1246,27 +1285,8 @@ void edac_mc_handle_error(const enum hw_event_mc_err_type type,
trace_mc_event(type, e->msg, e->label, e->error_count,
mci->mc_idx, e->top_layer, e->mid_layer, e->low_layer,
PAGES_TO_MiB(e->page_frame_number) | e->offset_in_page,
grain_bits, e->syndrome, other_detail);
grain_bits, e->syndrome, e->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",
e->page_frame_number, e->offset_in_page,
e->grain, e->syndrome);
edac_ce_error(mci, e->error_count, pos, e->msg, e->location,
e->label, detail, other_detail,
e->enable_per_layer_report,
e->page_frame_number, e->offset_in_page,
e->grain);
} else {
snprintf(detail, sizeof(detail),
"page:0x%lx offset:0x%lx grain:%ld",
page_frame_number, offset_in_page, e->grain);
edac_ue_error(mci, e->error_count, pos, e->msg, e->location,
e->label, detail, other_detail,
e->enable_per_layer_report);
}
edac_raw_mc_handle_error(type, mci, e);
}
EXPORT_SYMBOL_GPL(edac_mc_handle_error);