From: Andrew Jeffery <and...@aj.id.au>
An observation from trace output of the existing FSI tracepoints was
that the remote device was sometimes reporting as busy. Add a new
tracepoint reporting the busy count in order to get a better grip on how
often this is the case.
Signed-off-by: Andrew Jeffery <and...@aj.id.au>
Acked-by: Eddie James <eaja...@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
drivers/fsi/fsi-master-gpio.c | 3 +++
include/trace/events/fsi_master_gpio.h | 16 ++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
index 3f487449a277..2a49b167effe 100644
--- a/drivers/fsi/fsi-master-gpio.c
+++ b/drivers/fsi/fsi-master-gpio.c
@@ -401,6 +401,9 @@ static int poll_for_response(struct fsi_master_gpio *master,
break;
}
+ if (busy_count > 0)
+ trace_fsi_master_gpio_poll_response_busy(master, busy_count);
+
/* Clock the slave enough to be ready for next operation */
clock_zeros(master, FSI_GPIO_PRIME_SLAVE_CLOCKS);
return rc;
diff --git a/include/trace/events/fsi_master_gpio.h
b/include/trace/events/fsi_master_gpio.h
index f95cf3264bf9..33e928c5acf3 100644
--- a/include/trace/events/fsi_master_gpio.h
+++ b/include/trace/events/fsi_master_gpio.h
@@ -64,6 +64,22 @@ TRACE_EVENT(fsi_master_gpio_break,
)
);
+
+TRACE_EVENT(fsi_master_gpio_poll_response_busy,
+ TP_PROTO(const struct fsi_master_gpio *master, int busy),
+ TP_ARGS(master, busy),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, busy)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->master.idx;
+ __entry->busy = busy;
+ ),
+ TP_printk("fsi-gpio%d: device reported busy %d times",
+ __entry->master_idx, __entry->busy)
+);
+
#endif /* _TRACE_FSI_MASTER_GPIO_H */
#include <trace/define_trace.h>
--
2.17.0
