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    Subject[PATCH v3 13/13] 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 | 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
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