cxl/mem: Trace DRAM Event Record

CXL rev 3.0 section 8.2.9.2.1.2 defines the DRAM Event Record.

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

Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20221216-cxl-ev-log-v7-4-2316a5c8f7d8@intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/cxl/core/trace.h b/drivers/cxl/core/trace.h
index ece4161d6620..f4bf7dfaf7fd 100644
--- a/drivers/cxl/core/trace.h
+++ b/drivers/cxl/core/trace.h
@@ -346,6 +346,98 @@ TRACE_EVENT(cxl_general_media,
 	)
 );
 
+/*
+ * DRAM Event Record - DER
+ *
+ * CXL rev 3.0 section 8.2.9.2.1.2; Table 8-44
+ */
+/*
+ * DRAM Event Record defines many fields the same as the General Media Event
+ * Record.  Reuse those definitions as appropriate.
+ */
+#define CXL_DER_VALID_CHANNEL				BIT(0)
+#define CXL_DER_VALID_RANK				BIT(1)
+#define CXL_DER_VALID_NIBBLE				BIT(2)
+#define CXL_DER_VALID_BANK_GROUP			BIT(3)
+#define CXL_DER_VALID_BANK				BIT(4)
+#define CXL_DER_VALID_ROW				BIT(5)
+#define CXL_DER_VALID_COLUMN				BIT(6)
+#define CXL_DER_VALID_CORRECTION_MASK			BIT(7)
+#define show_dram_valid_flags(flags)	__print_flags(flags, "|",			   \
+	{ CXL_DER_VALID_CHANNEL,			"CHANNEL"		}, \
+	{ CXL_DER_VALID_RANK,				"RANK"			}, \
+	{ CXL_DER_VALID_NIBBLE,				"NIBBLE"		}, \
+	{ CXL_DER_VALID_BANK_GROUP,			"BANK GROUP"		}, \
+	{ CXL_DER_VALID_BANK,				"BANK"			}, \
+	{ CXL_DER_VALID_ROW,				"ROW"			}, \
+	{ CXL_DER_VALID_COLUMN,				"COLUMN"		}, \
+	{ CXL_DER_VALID_CORRECTION_MASK,		"CORRECTION MASK"	}  \
+)
+
+TRACE_EVENT(cxl_dram,
+
+	TP_PROTO(const struct device *dev, enum cxl_event_log_type log,
+		 struct cxl_event_dram *rec),
+
+	TP_ARGS(dev, log, rec),
+
+	TP_STRUCT__entry(
+		CXL_EVT_TP_entry
+		/* DRAM */
+		__field(u64, dpa)
+		__field(u8, descriptor)
+		__field(u8, type)
+		__field(u8, transaction_type)
+		__field(u8, channel)
+		__field(u16, validity_flags)
+		__field(u16, column)	/* Out of order to pack trace record */
+		__field(u32, nibble_mask)
+		__field(u32, row)
+		__array(u8, cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE)
+		__field(u8, rank)	/* Out of order to pack trace record */
+		__field(u8, bank_group)	/* Out of order to pack trace record */
+		__field(u8, bank)	/* Out of order to pack trace record */
+		__field(u8, dpa_flags)	/* Out of order to pack trace record */
+	),
+
+	TP_fast_assign(
+		CXL_EVT_TP_fast_assign(dev, log, rec->hdr);
+
+		/* DRAM */
+		__entry->dpa = le64_to_cpu(rec->phys_addr);
+		__entry->dpa_flags = __entry->dpa & CXL_DPA_FLAGS_MASK;
+		__entry->dpa &= CXL_DPA_MASK;
+		__entry->descriptor = rec->descriptor;
+		__entry->type = rec->type;
+		__entry->transaction_type = rec->transaction_type;
+		__entry->validity_flags = get_unaligned_le16(rec->validity_flags);
+		__entry->channel = rec->channel;
+		__entry->rank = rec->rank;
+		__entry->nibble_mask = get_unaligned_le24(rec->nibble_mask);
+		__entry->bank_group = rec->bank_group;
+		__entry->bank = rec->bank;
+		__entry->row = get_unaligned_le24(rec->row);
+		__entry->column = get_unaligned_le16(rec->column);
+		memcpy(__entry->cor_mask, &rec->correction_mask,
+			CXL_EVENT_DER_CORRECTION_MASK_SIZE);
+	),
+
+	CXL_EVT_TP_printk("dpa=%llx dpa_flags='%s' descriptor='%s' type='%s' " \
+		"transaction_type='%s' channel=%u rank=%u nibble_mask=%x " \
+		"bank_group=%u bank=%u row=%u column=%u cor_mask=%s " \
+		"validity_flags='%s'",
+		__entry->dpa, show_dpa_flags(__entry->dpa_flags),
+		show_event_desc_flags(__entry->descriptor),
+		show_mem_event_type(__entry->type),
+		show_trans_type(__entry->transaction_type),
+		__entry->channel, __entry->rank, __entry->nibble_mask,
+		__entry->bank_group, __entry->bank,
+		__entry->row, __entry->column,
+		__print_hex(__entry->cor_mask, CXL_EVENT_DER_CORRECTION_MASK_SIZE),
+		show_dram_valid_flags(__entry->validity_flags)
+	)
+);
+
 #endif /* _CXL_EVENTS_H */
 
 #define TRACE_INCLUDE_FILE trace