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cxl/trace: Add TRACE support for CXL media-error records 

CXL devices may support the retrieval of a device poison list.
Add a new trace event that the CXL subsystem may use to log
the media-error records returned in the poison list.

Log each media-error record as a cxl_poison trace event of
type 'List'.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/de6196f5269483d886ab1834744f82d27189a666.1681838291.git.alison.schofield@intel.com
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Alison Schofield 2023-04-18 10:39:05 -07:00 committed by Dan Williams
parent ed83f7ca39
commit ddf49d57b8
3 changed files with 102 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/cxl/core/core.h
View File

@ -64,4 +64,8 @@ int cxl_memdev_init(void);
void cxl_memdev_exit(void);
void cxl_mbox_init(void);
enum cxl_poison_trace_type {
CXL_POISON_TRACE_LIST,
};
#endif /* __CXL_CORE_H__ */

5
drivers/cxl/core/mbox.c
View File

@ -1190,7 +1190,10 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
if (rc)
break;
/* TODO TRACE the media error records */
for (int i = 0; i < le16_to_cpu(po->count); i++)
trace_cxl_poison(cxlmd, cxlr, &po->record[i],
po->flags, po->overflow_ts,
CXL_POISON_TRACE_LIST);
/* Protect against an uncleared _FLAG_MORE */
nr_records = nr_records + le16_to_cpu(po->count);

94
drivers/cxl/core/trace.h
View File

@ -7,10 +7,12 @@
#define _CXL_EVENTS_H
#include <linux/tracepoint.h>
#include <linux/pci.h>
#include <asm-generic/unaligned.h>
#include <cxl.h>
#include <cxlmem.h>
#include "core.h"
#define CXL_RAS_UC_CACHE_DATA_PARITY BIT(0)
#define CXL_RAS_UC_CACHE_ADDR_PARITY BIT(1)
@ -600,6 +602,98 @@ TRACE_EVENT(cxl_memory_module,
)
);
#define show_poison_trace_type(type) \
__print_symbolic(type, \
{ CXL_POISON_TRACE_LIST, "List" })
#define __show_poison_source(source) \
__print_symbolic(source, \
{ CXL_POISON_SOURCE_UNKNOWN, "Unknown" }, \
{ CXL_POISON_SOURCE_EXTERNAL, "External" }, \
{ CXL_POISON_SOURCE_INTERNAL, "Internal" }, \
{ CXL_POISON_SOURCE_INJECTED, "Injected" }, \
{ CXL_POISON_SOURCE_VENDOR, "Vendor" })
#define show_poison_source(source) \
(((source > CXL_POISON_SOURCE_INJECTED) && \
(source != CXL_POISON_SOURCE_VENDOR)) ? "Reserved" \
: __show_poison_source(source))
#define show_poison_flags(flags) \
__print_flags(flags, "|", \
{ CXL_POISON_FLAG_MORE, "More" }, \
{ CXL_POISON_FLAG_OVERFLOW, "Overflow" }, \
{ CXL_POISON_FLAG_SCANNING, "Scanning" })
#define __cxl_poison_addr(record) \
(le64_to_cpu(record->address))
#define cxl_poison_record_dpa(record) \
(__cxl_poison_addr(record) & CXL_POISON_START_MASK)
#define cxl_poison_record_source(record) \
(__cxl_poison_addr(record) & CXL_POISON_SOURCE_MASK)
#define cxl_poison_record_dpa_length(record) \
(le32_to_cpu(record->length) * CXL_POISON_LEN_MULT)
#define cxl_poison_overflow(flags, time) \
(flags & CXL_POISON_FLAG_OVERFLOW ? le64_to_cpu(time) : 0)
TRACE_EVENT(cxl_poison,
TP_PROTO(struct cxl_memdev *cxlmd, struct cxl_region *region,
const struct cxl_poison_record *record, u8 flags,
__le64 overflow_ts, enum cxl_poison_trace_type trace_type),
TP_ARGS(cxlmd, region, record, flags, overflow_ts, trace_type),
TP_STRUCT__entry(
__string(memdev, dev_name(&cxlmd->dev))
__string(host, dev_name(cxlmd->dev.parent))
__field(u64, serial)
__field(u8, trace_type)
__string(region, region)
__field(u64, overflow_ts)
__field(u64, dpa)
__field(u32, dpa_length)
__array(char, uuid, 16)
__field(u8, source)
__field(u8, flags)
),
TP_fast_assign(
__assign_str(memdev, dev_name(&cxlmd->dev));
__assign_str(host, dev_name(cxlmd->dev.parent));
__entry->serial = cxlmd->cxlds->serial;
__entry->overflow_ts = cxl_poison_overflow(flags, overflow_ts);
__entry->dpa = cxl_poison_record_dpa(record);
__entry->dpa_length = cxl_poison_record_dpa_length(record);
__entry->source = cxl_poison_record_source(record);
__entry->trace_type = trace_type;
__entry->flags = flags;
if (region) {
__assign_str(region, dev_name(&region->dev));
memcpy(__entry->uuid, &region->params.uuid, 16);
} else {
__assign_str(region, "");
memset(__entry->uuid, 0, 16);
}
),
TP_printk("memdev=%s host=%s serial=%lld trace_type=%s region=%s " \
"region_uuid=%pU dpa=0x%llx dpa_length=0x%x source=%s " \
"flags=%s overflow_time=%llu",
__get_str(memdev),
__get_str(host),
__entry->serial,
show_poison_trace_type(__entry->trace_type),
__get_str(region),
__entry->uuid,
__entry->dpa,
__entry->dpa_length,
show_poison_source(__entry->source),
show_poison_flags(__entry->flags),
__entry->overflow_ts
)
);
#endif /* _CXL_EVENTS_H */
#define TRACE_INCLUDE_FILE trace