gpu: nvgpu: move fecs trace debugfs to linux

Add fecs trace debugfs initialization as an os op. The
debugfs nodes are set up for gpu versions which call
gk20a_fecs_trace_init().

JIRA NVGPU-602

Change-Id: I606ec31acbf04f633500be4c342db32f3f537794
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1812449
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/fecs_trace.h b/drivers/gpu/nvgpu/include/nvgpu/fecs_trace.h
new file mode 100644
index 00000000..5dc35302
--- /dev/null
+++ b/drivers/gpu/nvgpu/include/nvgpu/fecs_trace.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_FECS_TRACE_H
+#define NVGPU_FECS_TRACE_H
+
+struct gk20a;
+
+/*
+ * If HW circular buffer is getting too many "buffer full" conditions,
+ * increasing this constant should help (it drives Linux' internal buffer size).
+ */
+#define GK20A_FECS_TRACE_NUM_RECORDS            (1 << 10)
+#define GK20A_FECS_TRACE_HASH_BITS              8 /* 2^8 */
+#define GK20A_FECS_TRACE_FRAME_PERIOD_US        (1000000ULL/60ULL)
+#define GK20A_FECS_TRACE_PTIMER_SHIFT           5
+
+struct gk20a_fecs_trace_record {
+        u32 magic_lo;
+        u32 magic_hi;
+        u32 context_id;
+        u32 context_ptr;
+        u32 new_context_id;
+        u32 new_context_ptr;
+        u64 ts[];
+};
+
+#ifdef CONFIG_GK20A_CTXSW_TRACE
+u32 gk20a_fecs_trace_record_ts_tag_invalid_ts_v(void);
+u32 gk20a_fecs_trace_record_ts_tag_v(u64 ts);
+u64 gk20a_fecs_trace_record_ts_timestamp_v(u64 ts);
+int gk20a_fecs_trace_num_ts(void);
+struct gk20a_fecs_trace_record *gk20a_fecs_trace_get_record(struct gk20a *g,
+        int idx);
+bool gk20a_fecs_trace_is_valid_record(struct gk20a_fecs_trace_record *r);
+int gk20a_fecs_trace_get_read_index(struct gk20a *g);
+int gk20a_fecs_trace_get_write_index(struct gk20a *g);
+
+#endif /* CONFIG_GK20A_CTXSW_TRACE */
+
+#endif