[RFC V2 PATCH 05/11] cxl/mem: Trace General Media Event Record

From: ira . weiny
Date: Mon Oct 10 2022 - 18:43:24 EST

From: Ira Weiny <ira.weiny@xxxxxxxxx>

CXL rev 3.0 section 8.2.9.2.1.1 defines the General Media Event Record.

Determine if the event read is a general media record and if so trace
the record.

Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>

---
Changes from RFC:
Add reserved byte array
Use common CXL event header record macros
Jonathan
Use unaligned_le{24,16} for unaligned fields
Don't use the inverse of phy addr mask
Dave Jiang
s/cxl_gen_media_event/general_media
s/cxl_evt_gen_media/cxl_event_gen_media
---
drivers/cxl/core/mbox.c | 30 ++++++++++-
drivers/cxl/cxlmem.h | 20 +++++++
include/trace/events/cxl.h | 108 +++++++++++++++++++++++++++++++++++++
3 files changed, 156 insertions(+), 2 deletions(-)

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index bc4e42b3e01b..1097250c115a 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -712,6 +712,32 @@ int cxl_enumerate_cmds(struct cxl_dev_state *cxlds)
}
EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL);

+/*
+ * General Media Event Record
+ * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
+ */
+static const uuid_t gen_media_event_uuid =
+ UUID_INIT(0xfbcd0a77, 0xc260, 0x417f,
+ 0x85, 0xa9, 0x08, 0x8b, 0x16, 0x21, 0xeb, 0xa6);
+
+static void cxl_trace_event_record(const char *dev_name,
+ enum cxl_event_log_type type,
+ struct cxl_get_event_payload *payload)
+{
+ uuid_t *id = &payload->record.hdr.id;
+
+ if (uuid_equal(id, &gen_media_event_uuid)) {
+ struct cxl_event_gen_media *rec =
+ (struct cxl_event_gen_media *)&payload->record;
+
+ trace_general_media(dev_name, type, rec);
+ return;
+ }
+
+ /* For unknown record types print just the header */
+ trace_generic_event(dev_name, type, &payload->record);
+}
+
static int cxl_clear_event_record(struct cxl_dev_state *cxlds,
enum cxl_event_log_type log,
__le16 handle)
@@ -745,8 +771,8 @@ static void cxl_mem_get_records_log(struct cxl_dev_state *cxlds,
}

if (le16_to_cpu(payload.record_count) == 1) {
- trace_generic_event(dev_name(cxlds->dev), type,
- &payload.record);
+ cxl_trace_event_record(dev_name(cxlds->dev), type,
+ &payload);
rc = cxl_clear_event_record(cxlds, type,
payload.record.hdr.handle);
if (rc) {
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 75aea34f3ffb..b5c120bd4068 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -411,6 +411,26 @@ struct cxl_mbox_clear_event_payload {
__le16 handle;
};

+/*
+ * General Media Event Record
+ * CXL rev 3.0 Section 8.2.9.2.1.1; Table 8-43
+ */
+#define CXL_EVENT_GEN_MED_COMP_ID_SIZE 0x10
+#define CXL_EVENT_GEN_MED_RES_SIZE 0x2e
+struct cxl_event_gen_media {
+ struct cxl_event_record_hdr hdr;
+ __le64 phys_addr;
+ u8 descriptor;
+ u8 type;
+ u8 transaction_type;
+ u8 validity_flags[2];
+ u8 channel;
+ u8 rank;
+ u8 device[3];
+ u8 component_id[CXL_EVENT_GEN_MED_COMP_ID_SIZE];
+ u8 reserved[CXL_EVENT_GEN_MED_RES_SIZE];
+} __packed;
+
struct cxl_mbox_get_partition_info {
__le64 active_volatile_cap;
__le64 active_persistent_cap;
diff --git a/include/trace/events/cxl.h b/include/trace/events/cxl.h
index 318ba5fe046e..82a8d3b750a2 100644
--- a/include/trace/events/cxl.h
+++ b/include/trace/events/cxl.h
@@ -122,6 +122,114 @@ TRACE_EVENT(generic_event,
__print_hex(__entry->data, CXL_EVENT_RECORD_DATA_LENGTH))
);

+/*
+ * General Media Event Record - GMER
+ * CXL v2.0 Section 8.2.9.1.1.1; Table 154
+ */
+#define CXL_GMER_PHYS_ADDR_VOLATILE BIT(0)
+#define CXL_GMER_PHYS_ADDR_MASK 0xFFFFFFFFFFFFFF80
+
+#define CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT BIT(0)
+#define CXL_GMER_EVT_DESC_THRESHOLD_EVENT BIT(1)
+#define CXL_GMER_EVT_DESC_POISON_LIST_OVERFLOW BIT(2)
+#define show_event_desc_flags(flags) __print_flags(flags, "|", \
+ { CXL_GMER_EVT_DESC_UNCORECTABLE_EVENT, "Uncorrectable Event" }, \
+ { CXL_GMER_EVT_DESC_THRESHOLD_EVENT, "Threshold event" }, \
+ { CXL_GMER_EVT_DESC_POISON_LIST_OVERFLOW, "Poison List Overflow" } \
+)
+
+#define CXL_GMER_MEM_EVT_TYPE_ECC_ERROR 0x00
+#define CXL_GMER_MEM_EVT_TYPE_INV_ADDR 0x01
+#define CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR 0x02
+#define show_mem_event_type(type) __print_symbolic(type, \
+ { CXL_GMER_MEM_EVT_TYPE_ECC_ERROR, "ECC Error" }, \
+ { CXL_GMER_MEM_EVT_TYPE_INV_ADDR, "Invalid Address" }, \
+ { CXL_GMER_MEM_EVT_TYPE_DATA_PATH_ERROR, "Data Path Error" } \
+)
+
+#define CXL_GMER_TRANS_UNKNOWN 0x00
+#define CXL_GMER_TRANS_HOST_READ 0x01
+#define CXL_GMER_TRANS_HOST_WRITE 0x02
+#define CXL_GMER_TRANS_HOST_SCAN_MEDIA 0x03
+#define CXL_GMER_TRANS_HOST_INJECT_POISON 0x04
+#define CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB 0x05
+#define CXL_GMER_TRANS_INTERNAL_MEDIA_MANAGEMENT 0x06
+#define show_trans_type(type) __print_symbolic(type, \
+ { CXL_GMER_TRANS_UNKNOWN, "Unknown" }, \
+ { CXL_GMER_TRANS_HOST_READ, "Host Read" }, \
+ { CXL_GMER_TRANS_HOST_WRITE, "Host Write" }, \
+ { CXL_GMER_TRANS_HOST_SCAN_MEDIA, "Host Scan Media" }, \
+ { CXL_GMER_TRANS_HOST_INJECT_POISON, "Host Inject Poison" }, \
+ { CXL_GMER_TRANS_INTERNAL_MEDIA_SCRUB, "Internal Media Scrub" }, \
+ { CXL_GMER_TRANS_INTERNAL_MEDIA_MANAGEMENT, "Internal Media Management" } \
+)
+
+#define CXL_GMER_VALID_CHANNEL BIT(0)
+#define CXL_GMER_VALID_RANK BIT(1)
+#define CXL_GMER_VALID_DEVICE BIT(2)
+#define CXL_GMER_VALID_COMPONENT BIT(3)
+#define show_valid_flags(flags) __print_flags(flags, "|", \
+ { CXL_GMER_VALID_CHANNEL, "CHANNEL" }, \
+ { CXL_GMER_VALID_RANK, "RANK" }, \
+ { CXL_GMER_VALID_DEVICE, "DEVICE" }, \
+ { CXL_GMER_VALID_COMPONENT, "COMPONENT" } \
+)
+
+TRACE_EVENT(general_media,
+
+ TP_PROTO(const char *dev_name, enum cxl_event_log_type log,
+ struct cxl_event_gen_media *rec),
+
+ TP_ARGS(dev_name, log, rec),
+
+ TP_STRUCT__entry(
+ CXL_EVT_TP_entry
+ /* General Media */
+ __field(u64, phys_addr)
+ __field(u8, descriptor)
+ __field(u8, type)
+ __field(u8, transaction_type)
+ __field(u8, channel)
+ __field(u32, device)
+ __array(u8, comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE)
+ __array(u8, reserved, CXL_EVENT_GEN_MED_RES_SIZE)
+ __field(u16, validity_flags)
+ __field(u8, rank) /* Out of order to pack trace record */
+ ),
+
+ TP_fast_assign(
+ CXL_EVT_TP_fast_assign(dev_name, log, rec->hdr);
+
+ /* General Media */
+ __entry->phys_addr = le64_to_cpu(rec->phys_addr);
+ __entry->descriptor = rec->descriptor;
+ __entry->type = rec->type;
+ __entry->transaction_type = rec->transaction_type;
+ __entry->channel = rec->channel;
+ __entry->rank = rec->rank;
+ __entry->device = get_unaligned_le24(rec->device);
+ memcpy(__entry->comp_id, &rec->component_id,
+ CXL_EVENT_GEN_MED_COMP_ID_SIZE);
+ memcpy(__entry->reserved, &rec->reserved,
+ CXL_EVENT_GEN_MED_RES_SIZE);
+ __entry->validity_flags = get_unaligned_le16(&rec->validity_flags);
+ ),
+
+ CXL_EVT_TP_printk("phys_addr=%llx volatile=%s desc='%s' type='%s' " \
+ "trans_type='%s' channel=%u rank=%u device=%x comp_id=%s " \
+ "valid_flags='%s' reserved=%s",
+ __entry->phys_addr & CXL_GMER_PHYS_ADDR_MASK,
+ (__entry->phys_addr & CXL_GMER_PHYS_ADDR_VOLATILE) ? "TRUE" : "FALSE",
+ show_event_desc_flags(__entry->descriptor),
+ show_mem_event_type(__entry->type),
+ show_trans_type(__entry->transaction_type),
+ __entry->channel, __entry->rank, __entry->device,
+ __print_hex(__entry->comp_id, CXL_EVENT_GEN_MED_COMP_ID_SIZE),
+ show_valid_flags(__entry->validity_flags),
+ __print_hex(__entry->reserved, CXL_EVENT_GEN_MED_RES_SIZE)
+ )
+);
+
#endif /* _CXL_TRACE_EVENTS_H */

/* This part must be outside protection */
--
2.37.2