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Subject[PATCH v6 16/23] drivers/fsi: Add tracepoints for low-level operations
Date
From: Jeremy Kerr <jk@ozlabs.org>

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Chris Bostic <cbostic@linux.vnet.ibm.com>
---
drivers/fsi/fsi-core.c | 27 +++++++---
include/trace/events/fsi.h | 127 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 148 insertions(+), 6 deletions(-)
create mode 100644 include/trace/events/fsi.h

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index f7e55e7..09becec 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -21,6 +21,9 @@

#include "fsi-master.h"

+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi.h>
+
#define FSI_SLAVE_CONF_NEXT_MASK 0x80000000
#define FSI_SLAVE_CONF_SLOTS_MASK 0x00ff0000
#define FSI_SLAVE_CONF_SLOTS_SHIFT 16
@@ -541,11 +544,16 @@ static int fsi_master_read(struct fsi_master *master, int link,
{
int rc;

+ trace_fsi_master_read(master, link, slave_id, addr, size);
+
rc = fsi_check_access(addr, size);
- if (rc)
- return rc;
+ if (!rc)
+ rc = master->read(master, link, slave_id, addr, val, size);
+
+ trace_fsi_master_rw_result(master, link, slave_id, addr, size,
+ false, val, rc);

- return master->read(master, link, slave_id, addr, val, size);
+ return rc;
}

static int fsi_master_write(struct fsi_master *master, int link,
@@ -553,11 +561,16 @@ static int fsi_master_write(struct fsi_master *master, int link,
{
int rc;

+ trace_fsi_master_write(master, link, slave_id, addr, size, val);
+
rc = fsi_check_access(addr, size);
- if (rc)
- return rc;
+ if (!rc)
+ rc = master->write(master, link, slave_id, addr, val, size);

- return master->write(master, link, slave_id, addr, val, size);
+ trace_fsi_master_rw_result(master, link, slave_id, addr, size,
+ true, val, rc);
+
+ return rc;
}

static int fsi_master_link_enable(struct fsi_master *master, int link)
@@ -573,6 +586,8 @@ static int fsi_master_link_enable(struct fsi_master *master, int link)
*/
static int fsi_master_break(struct fsi_master *master, int link)
{
+ trace_fsi_master_break(master, link);
+
if (master->send_break)
return master->send_break(master, link);

diff --git a/include/trace/events/fsi.h b/include/trace/events/fsi.h
new file mode 100644
index 0000000..ac74a30
--- /dev/null
+++ b/include/trace/events/fsi.h
@@ -0,0 +1,127 @@
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fsi
+
+#if !defined(_TRACE_FSI_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FSI_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(fsi_master_read,
+ TP_PROTO(const struct fsi_master *master, int link, int id,
+ uint32_t addr, size_t size),
+ TP_ARGS(master, link, id, addr, size),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, link)
+ __field(int, id)
+ __field(__u32, addr)
+ __field(size_t, size)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->idx;
+ __entry->link = link;
+ __entry->id = id;
+ __entry->addr = addr;
+ __entry->size = size;
+ ),
+ TP_printk("fsi%d:%02d:%02d %08x[%zd]",
+ __entry->master_idx,
+ __entry->link,
+ __entry->id,
+ __entry->addr,
+ __entry->size
+ )
+);
+
+TRACE_EVENT(fsi_master_write,
+ TP_PROTO(const struct fsi_master *master, int link, int id,
+ uint32_t addr, size_t size, const void *data),
+ TP_ARGS(master, link, id, addr, size, data),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, link)
+ __field(int, id)
+ __field(__u32, addr)
+ __field(size_t, size)
+ __field(__u32, data)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->idx;
+ __entry->link = link;
+ __entry->id = id;
+ __entry->addr = addr;
+ __entry->size = size;
+ __entry->data = 0;
+ memcpy(&__entry->data, data, size);
+ ),
+ TP_printk("fsi%d:%02d:%02d %08x[%zd] <= {%*ph}",
+ __entry->master_idx,
+ __entry->link,
+ __entry->id,
+ __entry->addr,
+ __entry->size,
+ __entry->size, &__entry->data
+ )
+);
+
+TRACE_EVENT(fsi_master_rw_result,
+ TP_PROTO(const struct fsi_master *master, int link, int id,
+ uint32_t addr, size_t size,
+ bool write, const void *data, int ret),
+ TP_ARGS(master, link, id, addr, size, write, data, ret),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, link)
+ __field(int, id)
+ __field(__u32, addr)
+ __field(size_t, size)
+ __field(bool, write)
+ __field(__u32, data)
+ __field(int, ret)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->idx;
+ __entry->link = link;
+ __entry->id = id;
+ __entry->addr = addr;
+ __entry->size = size;
+ __entry->write = write;
+ __entry->data = 0;
+ __entry->ret = ret;
+ if (__entry->write || !__entry->ret)
+ memcpy(&__entry->data, data, size);
+ ),
+ TP_printk("fsi%d:%02d:%02d %08x[%zd] %s {%*ph} ret %d",
+ __entry->master_idx,
+ __entry->link,
+ __entry->id,
+ __entry->addr,
+ __entry->size,
+ __entry->write ? "<=" : "=>",
+ __entry->size, &__entry->data,
+ __entry->ret
+ )
+);
+
+TRACE_EVENT(fsi_master_break,
+ TP_PROTO(const struct fsi_master *master, int link),
+ TP_ARGS(master, link),
+ TP_STRUCT__entry(
+ __field(int, master_idx)
+ __field(int, link)
+ ),
+ TP_fast_assign(
+ __entry->master_idx = master->idx;
+ __entry->link = link;
+ ),
+ TP_printk("fsi%d:%d",
+ __entry->master_idx,
+ __entry->link
+ )
+);
+
+
+#endif /* _TRACE_FSI_H */
+
+#include <trace/define_trace.h>
--
1.8.2.2
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