drm/amd/display: Implement stats logging

Stats will be used for debug purposes

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 334 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/stats/stats.c b/drivers/gpu/drm/amd/display/modules/stats/stats.c
new file mode 100644
index 000000000000..041f87b73d5f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/modules/stats/stats.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright 2016 Advanced Micro Devices, Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "mod_stats.h"
+#include "dm_services.h"
+#include "dc.h"
+#include "core_types.h"
+
+#define DAL_STATS_ENABLE_REGKEY			"DalStatsEnable"
+#define DAL_STATS_ENABLE_REGKEY_DEFAULT		0x00000001
+#define DAL_STATS_ENABLE_REGKEY_ENABLED		0x00000001
+
+#define DAL_STATS_ENTRIES_REGKEY		"DalStatsEntries"
+#define DAL_STATS_ENTRIES_REGKEY_DEFAULT	0x00350000
+#define DAL_STATS_ENTRIES_REGKEY_MAX		0x01000000
+
+#define MOD_STATS_NUM_VSYNCS			5
+
+struct stats_time_cache {
+	unsigned long flip_timestamp_in_ns;
+	unsigned long vupdate_timestamp_in_ns;
+
+	unsigned int render_time_in_us;
+	unsigned int avg_render_time_in_us_last_ten;
+	unsigned int v_sync_time_in_us[MOD_STATS_NUM_VSYNCS];
+	unsigned int num_vsync_between_flips;
+
+	unsigned int flip_to_vsync_time_in_us;
+	unsigned int vsync_to_flip_time_in_us;
+
+	unsigned int min_window;
+	unsigned int max_window;
+	unsigned int v_total_min;
+	unsigned int v_total_max;
+	unsigned int event_triggers;
+
+	unsigned int lfc_mid_point_in_us;
+	unsigned int num_frames_inserted;
+	unsigned int inserted_duration_in_us;
+
+	unsigned int flags;
+};
+
+struct core_stats {
+	struct mod_stats public;
+	struct dc *dc;
+
+	struct stats_time_cache *time;
+	unsigned int index;
+
+	bool enabled;
+	unsigned int entries;
+};
+
+#define MOD_STATS_TO_CORE(mod_stats)\
+		container_of(mod_stats, struct core_stats, public)
+
+bool mod_stats_init(struct mod_stats *mod_stats)
+{
+	bool result = false;
+	struct core_stats *core_stats = NULL;
+	struct dc *dc = NULL;
+
+	if (mod_stats == NULL)
+		return false;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+	dc = core_stats->dc;
+
+	return result;
+}
+
+struct mod_stats *mod_stats_create(struct dc *dc)
+{
+	struct core_stats *core_stats = NULL;
+	struct persistent_data_flag flag;
+	unsigned int reg_data;
+	int i = 0;
+
+	core_stats = kzalloc(sizeof(struct core_stats), GFP_KERNEL);
+
+	if (core_stats == NULL)
+		goto fail_alloc_context;
+
+	if (dc == NULL)
+		goto fail_construct;
+
+	core_stats->dc = dc;
+
+	core_stats->enabled = DAL_STATS_ENABLE_REGKEY_DEFAULT;
+	if (dm_read_persistent_data(dc->ctx, NULL, NULL,
+			DAL_STATS_ENABLE_REGKEY,
+			&reg_data, sizeof(unsigned int), &flag))
+		core_stats->enabled = reg_data;
+
+	core_stats->entries = DAL_STATS_ENTRIES_REGKEY_DEFAULT;
+	if (dm_read_persistent_data(dc->ctx, NULL, NULL,
+			DAL_STATS_ENTRIES_REGKEY,
+			&reg_data, sizeof(unsigned int), &flag)) {
+		if (reg_data > DAL_STATS_ENTRIES_REGKEY_MAX)
+			core_stats->entries = DAL_STATS_ENTRIES_REGKEY_MAX;
+		else
+			core_stats->entries = reg_data;
+	}
+
+	core_stats->time = kzalloc(sizeof(struct stats_time_cache) * core_stats->entries,
+					GFP_KERNEL);
+
+	if (core_stats->time == NULL)
+		goto fail_construct;
+
+	/* Purposely leave index 0 unused so we don't need special logic to
+	 * handle calculation cases that depend on previous flip data.
+	 */
+	core_stats->index = 1;
+
+	return &core_stats->public;
+
+fail_construct:
+	kfree(core_stats);
+
+fail_alloc_context:
+	return NULL;
+}
+
+void mod_stats_destroy(struct mod_stats *mod_stats)
+{
+	if (mod_stats != NULL) {
+		struct core_stats *core_stats = MOD_STATS_TO_CORE(mod_stats);
+
+		if (core_stats->time != NULL)
+			kfree(core_stats->time);
+
+		kfree(core_stats);
+	}
+}
+
+void mod_stats_dump(struct mod_stats *mod_stats)
+{
+	struct dc  *dc = NULL;
+	struct dal_logger *logger = NULL;
+	struct core_stats *core_stats = NULL;
+	struct stats_time_cache *time = NULL;
+	unsigned int index = 0;
+
+	if (mod_stats == NULL)
+		return;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+	dc = core_stats->dc;
+	logger = dc->ctx->logger;
+	time = core_stats->time;
+
+	//LogEntry* pLog = GetLog()->Open(LogMajor_ISR, LogMinor_ISR_FreeSyncSW);
+
+	//if (!pLog->IsDummyEntry())
+	{
+		dm_logger_write(logger, LOG_PROFILING, "==Display Caps==\n");
+		dm_logger_write(logger, LOG_PROFILING, "\n");
+		dm_logger_write(logger, LOG_PROFILING, "\n");
+
+		dm_logger_write(logger, LOG_PROFILING, "==Stats==\n");
+		dm_logger_write(logger, LOG_PROFILING,
+			"render avgRender minWindow midPoint maxWindow vsyncToFlip flipToVsync #vsyncBetweenFlip #frame insertDuration vTotalMin vTotalMax eventTrigs vSyncTime1 vSyncTime2 vSyncTime3 vSyncTime4 vSyncTime5 flags\n");
+
+		for (int i = 0; i < core_stats->index && i < core_stats->entries; i++) {
+			dm_logger_write(logger, LOG_PROFILING,
+					"%u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u  %u\n",
+					time[i].render_time_in_us,
+					time[i].avg_render_time_in_us_last_ten,
+					time[i].min_window,
+					time[i].lfc_mid_point_in_us,
+					time[i].max_window,
+					time[i].vsync_to_flip_time_in_us,
+					time[i].flip_to_vsync_time_in_us,
+					time[i].num_vsync_between_flips,
+					time[i].num_frames_inserted,
+					time[i].inserted_duration_in_us,
+					time[i].v_total_min,
+					time[i].v_total_max,
+					time[i].event_triggers,
+					time[i].v_sync_time_in_us[0],
+					time[i].v_sync_time_in_us[1],
+					time[i].v_sync_time_in_us[2],
+					time[i].v_sync_time_in_us[3],
+					time[i].v_sync_time_in_us[4],
+					time[i].flags);
+		}
+	}
+	//GetLog()->Close(pLog);
+	//GetLog()->UnSetLogMask(LogMajor_ISR, LogMinor_ISR_FreeSyncSW);
+}
+
+void mod_stats_reset_data(struct mod_stats *mod_stats)
+{
+	struct core_stats *core_stats = NULL;
+	struct stats_time_cache *time = NULL;
+	unsigned int index = 0;
+
+	if (mod_stats == NULL)
+		return;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+
+	memset(core_stats->time, 0,
+		sizeof(struct stats_time_cache) * core_stats->entries);
+
+	core_stats->index = 0;
+}
+
+void mod_stats_update_flip(struct mod_stats *mod_stats,
+		unsigned long timestamp_in_ns)
+{
+	struct core_stats *core_stats = NULL;
+	struct stats_time_cache *time = NULL;
+	unsigned int index = 0;
+
+	if (mod_stats == NULL)
+		return;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+
+	if (core_stats->index >= core_stats->entries)
+		return;
+
+	time = core_stats->time;
+	index = core_stats->index;
+
+	time[index].flip_timestamp_in_ns = timestamp_in_ns;
+	time[index].render_time_in_us =
+		timestamp_in_ns - time[index - 1].flip_timestamp_in_ns;
+
+	if (index >= 10) {
+		for (unsigned int i = 0; i < 10; i++)
+			time[index].avg_render_time_in_us_last_ten +=
+					time[index - i].render_time_in_us;
+		time[index].avg_render_time_in_us_last_ten /= 10;
+	}
+
+	if (time[index].num_vsync_between_flips > 0)
+		time[index].vsync_to_flip_time_in_us =
+			timestamp_in_ns - time[index].vupdate_timestamp_in_ns;
+	else
+		time[index].vsync_to_flip_time_in_us =
+			timestamp_in_ns - time[index - 1].vupdate_timestamp_in_ns;
+
+	core_stats->index++;
+}
+
+void mod_stats_update_vupdate(struct mod_stats *mod_stats,
+		unsigned long timestamp_in_ns)
+{
+	struct core_stats *core_stats = NULL;
+	struct stats_time_cache *time = NULL;
+	unsigned int index = 0;
+
+	if (mod_stats == NULL)
+		return;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+
+	if (core_stats->index >= core_stats->entries)
+		return;
+
+	time = core_stats->time;
+	index = core_stats->index;
+
+	time[index].vupdate_timestamp_in_ns = timestamp_in_ns;
+	if (time[index].num_vsync_between_flips < MOD_STATS_NUM_VSYNCS)
+		time[index].v_sync_time_in_us[time[index].num_vsync_between_flips] =
+			timestamp_in_ns - time[index - 1].vupdate_timestamp_in_ns;
+	time[index].flip_to_vsync_time_in_us =
+		timestamp_in_ns - time[index - 1].flip_timestamp_in_ns;
+
+	time[index].num_vsync_between_flips++;
+}
+
+void mod_stats_update_freesync(struct mod_stats *mod_stats,
+		unsigned int v_total_min,
+		unsigned int v_total_max,
+		unsigned int event_triggers,
+		unsigned int window_min,
+		unsigned int window_max,
+		unsigned int lfc_mid_point_in_us,
+		unsigned int inserted_frames,
+		unsigned int inserted_duration_in_us)
+{
+	struct core_stats *core_stats = NULL;
+	struct stats_time_cache *time = NULL;
+	unsigned int index = 0;
+
+	if (mod_stats == NULL)
+		return;
+
+	core_stats = MOD_STATS_TO_CORE(mod_stats);
+
+	if (core_stats->index >= core_stats->entries)
+		return;
+
+	time = core_stats->time;
+	index = core_stats->index;
+
+	time[index].v_total_min = v_total_min;
+	time[index].v_total_max = v_total_max;
+	time[index].event_triggers = event_triggers;
+	time[index].min_window = window_min;
+	time[index].max_window = window_max;
+	time[index].lfc_mid_point_in_us = lfc_mid_point_in_us;
+	time[index].num_frames_inserted = inserted_frames;
+	time[index].inserted_duration_in_us = inserted_duration_in_us;
+}
+