Commit bab2a5e6 authored by Ira Weiny's avatar Ira Weiny Committed by Dan Williams
Browse files

cxl/test: Simulate event log overflow 



Log overflow is marked by a separate trace message.

Simulate a log with lots of messages and flag overflow until space is
cleared.

Reviewed-by: default avatarDan Williams <dan.j.williams@intel.com>
Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarIra Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20221216-cxl-ev-log-v7-8-2316a5c8f7d8@intel.com


Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 0092f62a

tools/testing/cxl/test/mem.c

+49 −1
Original line number Diff line number Diff line
@@ -78,6 +78,8 @@ struct mock_event_log { 
	u16 clear_idx;

	u16 cur_idx;

	u16 nr_events;

	u16 nr_overflow;

	u16 overflow_reset;

	struct cxl_event_record_raw *events[CXL_TEST_EVENT_CNT_MAX];

};
@@ -116,6 +118,7 @@ static void event_reset_log(struct mock_event_log *log) 
{

	log->cur_idx = 0;

	log->clear_idx = 0;

	log->nr_overflow = log->overflow_reset;

}



/* Handle can never be 0 use 1 based indexing for handle */
@@ -147,8 +150,12 @@ static void mes_add_event(struct mock_event_store *mes, 
		return;



	log = &mes->mock_logs[log_type];

	if (WARN_ON(log->nr_events >= CXL_TEST_EVENT_CNT_MAX))



	if ((log->nr_events + 1) > CXL_TEST_EVENT_CNT_MAX) {

		log->nr_overflow++;

		log->overflow_reset = log->nr_overflow;

		return;

	}



	log->events[log->nr_events] = event;

	log->nr_events++;
@@ -159,6 +166,7 @@ static int mock_get_event(struct cxl_dev_state *cxlds, 
{

	struct cxl_get_event_payload *pl;

	struct mock_event_log *log;

	u16 nr_overflow;

	u8 log_type;

	int i;
@@ -191,6 +199,19 @@ static int mock_get_event(struct cxl_dev_state *cxlds, 
	if (!event_log_empty(log))

		pl->flags |= CXL_GET_EVENT_FLAG_MORE_RECORDS;



	if (log->nr_overflow) {

		u64 ns;



		pl->flags |= CXL_GET_EVENT_FLAG_OVERFLOW;

		pl->overflow_err_count = cpu_to_le16(nr_overflow);

		ns = ktime_get_real_ns();

		ns -= 5000000000; /* 5s ago */

		pl->first_overflow_timestamp = cpu_to_le64(ns);

		ns = ktime_get_real_ns();

		ns -= 1000000000; /* 1s ago */

		pl->last_overflow_timestamp = cpu_to_le64(ns);

	}



	return 0;

}
@@ -231,6 +252,9 @@ static int mock_clear_event(struct cxl_dev_state *cxlds, 
		}

	}



	if (log->nr_overflow)

		log->nr_overflow = 0;



	/* Clear events */

	log->clear_idx += pl->nr_recs;

	return 0;
@@ -353,6 +377,30 @@ static void cxl_mock_add_event_logs(struct mock_event_store *mes) 
		      (struct cxl_event_record_raw *)&mem_module);

	mes->ev_status |= CXLDEV_EVENT_STATUS_INFO;



	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &maint_needed);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL,

		      (struct cxl_event_record_raw *)&dram);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL,

		      (struct cxl_event_record_raw *)&gen_media);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL,

		      (struct cxl_event_record_raw *)&mem_module);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL,

		      (struct cxl_event_record_raw *)&dram);

	/* Overflow this log */

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FAIL, &hardware_replace);

	mes->ev_status |= CXLDEV_EVENT_STATUS_FAIL;



	mes_add_event(mes, CXL_EVENT_TYPE_FATAL, &hardware_replace);

	mes_add_event(mes, CXL_EVENT_TYPE_FATAL,

		      (struct cxl_event_record_raw *)&dram);