gpu: nvgpu: PMU debug reorg

- Moved PMU debug related code to pmu_debug.c
  Print pmu trace buffer
  Moved PMU controller/engine status dump debug code
  Moved ELPG stats  dump code
- Removed PMU falcon controller status dump code & used
nvgpu_flcn_dump_stats() method,
- Method to print ELPG stats.
- PMU HAL to print PMU engine & ELPG debug info upon error

NVGPU JIRA-96

Change-Id: Iaa3d983f1d3b78a1b051beb6c109d3da8f8c90bc
Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1516640
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>

2 files changed, 52 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/common/pmu/pmu_debug.c b/drivers/gpu/nvgpu/common/pmu/pmu_debug.c
new file mode 100644
index 00000000..744a618d
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/pmu/pmu_debug.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2016-2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <nvgpu/pmu.h>
+#include <nvgpu/log.h>
+#include <nvgpu/timers.h>
+#include <nvgpu/kmem.h>
+#include <nvgpu/dma.h>
+#include <nvgpu/pmuif/nvgpu_gpmu_cmdif.h>
+
+#include "gk20a/gk20a.h"
+
+void nvgpu_pmu_dump_elpg_stats(struct nvgpu_pmu *pmu)
+{
+        struct gk20a *g = pmu->g;
+
+        /* Print PG stats */
+        nvgpu_err(g, "Print PG stats");
+        nvgpu_flcn_print_dmem(pmu->flcn,
+                pmu->stat_dmem_offset[PMU_PG_ELPG_ENGINE_ID_GRAPHICS],
+                sizeof(struct pmu_pg_stats_v2));
+
+        gk20a_pmu_dump_elpg_stats(pmu);
+}
+
+void nvgpu_pmu_dump_falcon_stats(struct nvgpu_pmu *pmu)
+{
+        struct gk20a *g = pmu->g;
+
+        nvgpu_flcn_dump_stats(pmu->flcn);
+        gk20a_pmu_dump_falcon_stats(pmu);
+
+        nvgpu_err(g, "pmu state: %d", pmu->pmu_state);
+        nvgpu_err(g, "elpg state: %d", pmu->elpg_stat);
+
+        /* PMU may crash due to FECS crash. Dump FECS status */
+        gk20a_fecs_dump_falcon_stats(g);
+}
diff --git a/drivers/gpu/nvgpu/common/pmu/pmu_pg.c b/drivers/gpu/nvgpu/common/pmu/pmu_pg.c
index b435f4a7..3f74b9f7 100644
--- a/drivers/gpu/nvgpu/common/pmu/pmu_pg.c
+++ b/drivers/gpu/nvgpu/common/pmu/pmu_pg.c
@@ -265,8 +265,8 @@ int nvgpu_pmu_disable_elpg(struct gk20a *g)
                 if (pmu->elpg_stat != PMU_ELPG_STAT_ON) {
                         nvgpu_err(g, "ELPG_ALLOW_ACK failed, elpg_stat=%d",
                                 pmu->elpg_stat);
-                        pmu_dump_elpg_stats(pmu);
-                        pmu_dump_falcon_stats(pmu);
+                        nvgpu_pmu_dump_elpg_stats(pmu);
+                        nvgpu_pmu_dump_falcon_stats(pmu);
                         ret = -EBUSY;
                         goto exit_unlock;
                 }
@@ -315,8 +315,8 @@ int nvgpu_pmu_disable_elpg(struct gk20a *g)
                                 ptr, PMU_ELPG_STAT_OFF);
                         if (*ptr != PMU_ELPG_STAT_OFF) {
                                 nvgpu_err(g, "ELPG_DISALLOW_ACK failed");
-                                        pmu_dump_elpg_stats(pmu);
-                                        pmu_dump_falcon_stats(pmu);
+                                        nvgpu_pmu_dump_elpg_stats(pmu);
+                                        nvgpu_pmu_dump_falcon_stats(pmu);
                                 ret = -EBUSY;
                                 goto exit_unlock;
                         }