drm/amd/pm: Add thermal alert logging to smu15.0.8

Add logging for thermal events in SMUv15.0.8 SOCs

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
index e62494810b803297ca714db4cac622bcd6aba758..977590377021e2a491b9194dbf7064aadd09e540 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
@@ -173,6 +173,13 @@ static const struct cmn2asic_mapping smu_v15_0_8_table_map[SMU_TABLE_COUNT] = {
        TAB_MAP(I2C_COMMANDS),
 };
 
+static const uint8_t smu_v15_0_8_throttler_map[] = {
+       [THROTTLER_PROCHOT_BIT] = (SMU_THROTTLER_PROCHOT_GFX_BIT),
+       [THROTTLER_THERMAL_SOCKET_BIT] = (SMU_THROTTLER_TEMP_GPU_BIT),
+       [THROTTLER_THERMAL_VR_BIT] = (SMU_THROTTLER_TEMP_VR_GFX_BIT),
+       [THROTTLER_THERMAL_HBM_BIT] = (SMU_THROTTLER_TEMP_MEM_BIT),
+};
+
 static size_t smu_v15_0_8_get_system_metrics_size(void)
 {
        return sizeof(SystemMetricsTable_t);
@@ -2274,6 +2281,63 @@ static int smu_v15_0_8_get_ppt_limit(struct smu_context *smu,
        return -EOPNOTSUPP;
 }
 
+static uint32_t smu_v15_0_8_get_throttler_status(struct smu_context *smu)
+{
+       struct smu_power_context *smu_power = &smu->smu_power;
+       struct smu_15_0_power_context *power_context = smu_power->power_context;
+       uint32_t throttler_status = 0;
+
+       throttler_status = atomic_read(&power_context->throttle_status);
+       dev_dbg(smu->adev->dev, "SMU Throttler status: %u", throttler_status);
+
+       return throttler_status;
+}
+
+static const char *const throttling_logging_label[] = {
+       [THROTTLER_PROCHOT_BIT] = "Prochot",
+       [THROTTLER_THERMAL_SOCKET_BIT] = "SOC",
+       [THROTTLER_THERMAL_VR_BIT] = "VR",
+       [THROTTLER_THERMAL_HBM_BIT] = "HBM"
+};
+
+static void smu_v15_0_8_log_thermal_throttling_event(struct smu_context *smu)
+{
+       int throttler_idx, throttling_events = 0, buf_idx = 0;
+       struct amdgpu_device *adev = smu->adev;
+       uint32_t throttler_status;
+       char log_buf[256];
+
+       throttler_status = smu_v15_0_8_get_throttler_status(smu);
+       if (!throttler_status)
+               return;
+
+       memset(log_buf, 0, sizeof(log_buf));
+       for (throttler_idx = 0;
+            throttler_idx < ARRAY_SIZE(throttling_logging_label);
+            throttler_idx++) {
+               if (throttler_status & (1U << throttler_idx)) {
+                       throttling_events++;
+                       buf_idx += snprintf(
+                               log_buf + buf_idx, sizeof(log_buf) - buf_idx,
+                               "%s%s", throttling_events > 1 ? " and " : "",
+                               throttling_logging_label[throttler_idx]);
+                       if (buf_idx >= sizeof(log_buf)) {
+                               dev_err(adev->dev, "buffer overflow!\n");
+                               log_buf[sizeof(log_buf) - 1] = '\0';
+                               break;
+                       }
+               }
+       }
+
+       dev_warn(adev->dev,
+                "WARN: GPU is throttled, expect performance decrease. %s.\n",
+                log_buf);
+       kgd2kfd_smi_event_throttle(
+               smu->adev->kfd.dev,
+               smu_cmn_get_indep_throttler_status(throttler_status,
+                                                  smu_v15_0_8_throttler_map));
+}
+
 static int smu_v15_0_8_enable_thermal_alert(struct smu_context *smu)
 {
        if (!smu->irq_source.num_types)
@@ -2301,6 +2365,7 @@ static const struct pptable_funcs smu_v15_0_8_ppt_funcs = {
        .register_irq_handler = smu_v15_0_8_register_irq_handler,
        .enable_thermal_alert = smu_v15_0_8_enable_thermal_alert,
        .disable_thermal_alert = smu_v15_0_disable_thermal_alert,
+       .log_thermal_throttling_event = smu_v15_0_8_log_thermal_throttling_event,
        .setup_pptable = smu_v15_0_8_setup_pptable,
        .get_pp_feature_mask = smu_cmn_get_pp_feature_mask,
        .wait_for_event = smu_v15_0_wait_for_event,