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

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 00bf19a..9263b04 100644 (file)
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -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);