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Subject[PATCH 10/10] coresight: trace-id: Add debug & test macros to trace id allocation
Date
Adds in a number of pr_debug macros to allow the debugging and test of
the trace ID allocation system.

Signed-off-by: Mike Leach <mike.leach@linaro.org>
---
.../hwtracing/coresight/coresight-trace-id.c | 33 +++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-trace-id.c b/drivers/hwtracing/coresight/coresight-trace-id.c
index ce6c7d7b55d6..8dcb698b8899 100644
--- a/drivers/hwtracing/coresight/coresight-trace-id.c
+++ b/drivers/hwtracing/coresight/coresight-trace-id.c
@@ -71,6 +71,27 @@ static int coresight_trace_id_find_new_id(struct coresight_trace_id_map *id_map)
return id;
}

+/* #define TRACE_ID_DEBUG 1 */
+#ifdef TRACE_ID_DEBUG
+static void coresight_trace_id_dump_table(struct coresight_trace_id_map *id_map,
+ const char *func_name)
+{
+ /* currently 2 u64s are sufficient to hold all the ids */
+ pr_debug("%s id_map::\n", func_name);
+ pr_debug("Avial= 0x%016lx%016lx\n", id_map->avail_ids[1], id_map->avail_ids[0]);
+ pr_debug("Pend = 0x%016lx%016lx\n", id_map->pend_rel_ids[1], id_map->pend_rel_ids[0]);
+}
+#define DUMP_ID_MAP(map) coresight_trace_id_dump_table(map, __func__)
+#define DUMP_ID_CPU(cpu, id) pr_debug("%s called; cpu=%d, id=%d\n", __func__, cpu, id)
+#define DUMP_ID(id) pr_debug("%s called; id=%d\n", __func__, id)
+#define PERF_SESSION(n) pr_debug("%s perf count %d\n", __func__, n)
+#else
+#define DUMP_ID_MAP(map)
+#define DUMP_ID(id)
+#define DUMP_ID_CPU(cpu, id)
+#define PERF_SESSION(n)
+#endif
+
/* release all pending IDs for all current maps & clear CPU associations */
static void coresight_trace_id_release_all_pending(void)
{
@@ -82,6 +103,7 @@ static void coresight_trace_id_release_all_pending(void)
clear_bit(bit, id_map->avail_ids);
clear_bit(bit, id_map->pend_rel_ids);
}
+ DUMP_ID_MAP(id_map);
}

for_each_possible_cpu(cpu) {
@@ -112,6 +134,8 @@ int coresight_trace_id_get_cpu_id(int cpu, struct coresight_trace_id_map *id_map

get_cpu_id_out:
spin_unlock_irqrestore(&id_map_lock, flags);
+ DUMP_ID_CPU(cpu, id);
+ DUMP_ID_MAP(id_map);
return id;
}
EXPORT_SYMBOL_GPL(coresight_trace_id_get_cpu_id);
@@ -138,6 +162,8 @@ void coresight_trace_id_put_cpu_id(int cpu, struct coresight_trace_id_map *id_ma

put_cpu_id_out:
spin_unlock_irqrestore(&id_map_lock, flags);
+ DUMP_ID_CPU(cpu, id);
+ DUMP_ID_MAP(id_map);
}
EXPORT_SYMBOL_GPL(coresight_trace_id_put_cpu_id);

@@ -152,6 +178,8 @@ int coresight_trace_id_get_system_id(struct coresight_trace_id_map *id_map)
coresight_trace_id_set_inuse(id, id_map);
spin_unlock_irqrestore(&id_map_lock, flags);

+ DUMP_ID(id);
+ DUMP_ID_MAP(id_map);
return id;
}
EXPORT_SYMBOL_GPL(coresight_trace_id_get_system_id);
@@ -163,6 +191,9 @@ void coresight_trace_id_put_system_id(struct coresight_trace_id_map *id_map, int
spin_lock_irqsave(&id_map_lock, flags);
coresight_trace_id_clear_inuse(id, id_map);
spin_unlock_irqrestore(&id_map_lock, flags);
+
+ DUMP_ID(id);
+ DUMP_ID_MAP(id_map);
}
EXPORT_SYMBOL_GPL(coresight_trace_id_put_system_id);

@@ -172,6 +203,7 @@ void coresight_trace_id_perf_start(void)

spin_lock_irqsave(&id_map_lock, flags);
perf_cs_etm_session_active++;
+ PERF_SESSION(perf_cs_etm_session_active);
spin_unlock_irqrestore(&id_map_lock, flags);
}
EXPORT_SYMBOL_GPL(coresight_trace_id_perf_start);
@@ -182,6 +214,7 @@ void coresight_trace_id_perf_stop(void)

spin_lock_irqsave(&id_map_lock, flags);
perf_cs_etm_session_active--;
+ PERF_SESSION(perf_cs_etm_session_active);
if (!perf_cs_etm_session_active)
coresight_trace_id_release_all_pending();
spin_unlock_irqrestore(&id_map_lock, flags);
--
2.17.1
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