[PATCH v3 13/13] coresight: trace-id: Add debug & test macros to Trace ID allocation
From: Mike Leach
Date: Tue Aug 09 2022 - 18:35:22 EST
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@xxxxxxxxxx>
---
.../hwtracing/coresight/coresight-trace-id.c | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-trace-id.c b/drivers/hwtracing/coresight/coresight-trace-id.c
index ac9092896dec..24c19ff493a9 100644
--- a/drivers/hwtracing/coresight/coresight-trace-id.c
+++ b/drivers/hwtracing/coresight/coresight-trace-id.c
@@ -69,6 +69,30 @@ static void coresight_trace_id_set_pend_rel(int id, struct coresight_trace_id_ma
set_bit(id, id_map->pend_rel_ids);
}
+/* #define TRACE_ID_DEBUG 1 */
+#ifdef TRACE_ID_DEBUG
+static char page_buf[PAGE_SIZE];
+
+static void coresight_trace_id_dump_table(struct coresight_trace_id_map *id_map,
+ const char *func_name)
+{
+ pr_debug("%s id_map::\n", func_name);
+ bitmap_print_to_pagebuf(0, page_buf, id_map->used_ids, CORESIGHT_TRACE_IDS_MAX);
+ pr_debug("Avial= %s\n", page_buf);
+ bitmap_print_to_pagebuf(0, page_buf, id_map->pend_rel_ids, CORESIGHT_TRACE_IDS_MAX);
+ pr_debug("Pend = %s\n", page_buf);
+}
+#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)
{
@@ -88,6 +112,7 @@ static void coresight_trace_id_release_all_pending(void)
}
}
spin_unlock_irqrestore(&id_map_lock, flags);
+ DUMP_ID_MAP(id_map);
}
static int coresight_trace_id_map_get_cpu_id(int cpu, struct coresight_trace_id_map *id_map)
@@ -123,6 +148,8 @@ static int coresight_trace_id_map_get_cpu_id(int cpu, struct coresight_trace_id_
get_cpu_id_out:
spin_unlock_irqrestore(&id_map_lock, flags);
+ DUMP_ID_CPU(cpu, id);
+ DUMP_ID_MAP(id_map);
return id;
}
@@ -150,6 +177,8 @@ static void coresight_trace_id_map_put_cpu_id(int cpu, struct coresight_trace_id
spin_unlock_irqrestore(&id_map_lock, flags);
put_cpu_id_out:
+ DUMP_ID_CPU(cpu, id);
+ DUMP_ID_MAP(id_map);
}
static int coresight_trace_id_map_get_system_id(struct coresight_trace_id_map *id_map)
@@ -161,6 +190,8 @@ static int coresight_trace_id_map_get_system_id(struct coresight_trace_id_map *i
id = coresight_trace_id_alloc_new_id(id_map, 0);
spin_unlock_irqrestore(&id_map_lock, flags);
+ DUMP_ID(id);
+ DUMP_ID_MAP(id_map);
return id;
}
@@ -171,6 +202,9 @@ static void coresight_trace_id_map_put_system_id(struct coresight_trace_id_map *
spin_lock_irqsave(&id_map_lock, flags);
coresight_trace_id_free(id, id_map);
spin_unlock_irqrestore(&id_map_lock, flags);
+
+ DUMP_ID(id);
+ DUMP_ID_MAP(id_map);
}
/* API functions */
@@ -207,6 +241,7 @@ EXPORT_SYMBOL_GPL(coresight_trace_id_put_system_id);
void coresight_trace_id_perf_start(void)
{
atomic_inc(&perf_cs_etm_session_active);
+ PERF_SESSION(atomic_read(&perf_cs_etm_session_active));
}
EXPORT_SYMBOL_GPL(coresight_trace_id_perf_start);
@@ -214,6 +249,7 @@ void coresight_trace_id_perf_stop(void)
{
if (!atomic_dec_return(&perf_cs_etm_session_active))
coresight_trace_id_release_all_pending();
+ PERF_SESSION(atomic_read(&perf_cs_etm_session_active));
}
EXPORT_SYMBOL_GPL(coresight_trace_id_perf_stop);
--
2.17.1