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authorJeremy Kerr <jk@ozlabs.org>2017-06-06 23:08:51 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-09 11:52:08 +0200
commit66433b05a3b2b8f95be9e6269bc21e916febf482 (patch)
tree3ed705a672aac49dc8aeb67bf271ed2399c087ae /drivers/fsi/fsi-core.c
parentdrivers/fsi: expose direct-access slave API (diff)
downloadlinux-66433b05a3b2b8f95be9e6269bc21e916febf482.tar.xz
linux-66433b05a3b2b8f95be9e6269bc21e916febf482.zip
drivers/fsi: Add tracepoints for low-level operations
Trace low level read and write FSI bus operations. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fsi/fsi-core.c')
-rw-r--r--drivers/fsi/fsi-core.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 36813651ac0a..db54561161ac 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -23,6 +23,9 @@
#include "fsi-master.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/fsi.h>
+
#define FSI_SLAVE_CONF_NEXT_MASK GENMASK(31, 31)
#define FSI_SLAVE_CONF_SLOTS_MASK GENMASK(23, 16)
#define FSI_SLAVE_CONF_SLOTS_SHIFT 16
@@ -542,11 +545,16 @@ 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,
@@ -554,11 +562,16 @@ 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)
@@ -574,6 +587,8 @@ 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);