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drivers/fsi: Add tracepoints for low-level operations

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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>
This commit is contained in:
Jeremy Kerr 2017-06-06 16:08:51 -05:00 committed by Greg Kroah-Hartman
parent da36cadf89
commit 66433b05a3
2 changed files with 150 additions and 8 deletions
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31
drivers/fsi/fsi-core.c
View file

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

127
include/trace/events/fsi.h Normal file
View file

@ -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,
(int)__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 ? "<=" : "=>",
(int)__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>