spi: Provide trace points for message processing

Provide tracepoints for the lifecycle of a message from submission to
completion and for the active time for masters to help with performance
analysis of SPI I/O.

Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 94 insertions, 0 deletions

diff --git a/include/trace/events/spi.h b/include/trace/events/spi.h
new file mode 100644
index 000000000000..a7b09072ce56
--- /dev/null
+++ b/include/trace/events/spi.h
@@ -0,0 +1,94 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM spi
+
+#if !defined(_TRACE_SPI_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SPI_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(spi_master,
+
+        TP_PROTO(struct spi_master *master),
+
+        TP_ARGS(master),
+
+        TP_STRUCT__entry(
+                __field(        int,           bus_num             )
+        ),
+
+        TP_fast_assign(
+                __entry->bus_num = master->bus_num;
+        ),
+
+        TP_printk("spi%d", (int)__entry->bus_num)
+
+);
+
+DEFINE_EVENT(spi_master, spi_master_idle,
+
+        TP_PROTO(struct spi_master *master),
+
+        TP_ARGS(master)
+
+);
+
+DEFINE_EVENT(spi_master, spi_master_busy,
+
+        TP_PROTO(struct spi_master *master),
+
+        TP_ARGS(master)
+
+);
+
+DECLARE_EVENT_CLASS(spi_message,
+
+        TP_PROTO(struct spi_message *msg),
+
+        TP_ARGS(msg),
+
+        TP_STRUCT__entry(
+                __field(        int,            bus_num         )
+                __field(        int,            chip_select     )
+                __field(        struct spi_message *,   msg     )
+        ),
+
+        TP_fast_assign(
+                __entry->bus_num = msg->spi->master->bus_num;
+                __entry->chip_select = msg->spi->chip_select;
+                __entry->msg = msg;
+        ),
+
+        TP_printk("spi%d.%d %p", (int)__entry->bus_num,
+                  (int)__entry->chip_select,
+                  (struct spi_message *)__entry->msg)
+);
+
+DEFINE_EVENT(spi_message, spi_message_submit,
+
+        TP_PROTO(struct spi_message *msg),
+
+        TP_ARGS(msg)
+
+);
+
+DEFINE_EVENT(spi_message, spi_message_start,
+
+        TP_PROTO(struct spi_message *msg),
+
+        TP_ARGS(msg)
+
+);
+
+DEFINE_EVENT(spi_message, spi_message_done,
+
+        TP_PROTO(struct spi_message *msg),
+
+        TP_ARGS(msg)
+
+);
+
+#endif /* _TRACE_POWER_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>