[RFC 31/39] drm/i915: Added debugfs interface to scheduler tuning parameters

John.C.Harrison
2015-07-17T14:34:27Z

There are various parameters within the scheduler which can be tuned to improve
performance, reduce memory footprint, etc. This change adds support for altering
these via debugfs.

Change-Id: I6c26765269ae7173ff4d3a5c20921eaaca7c36ed
For: VIZ-1587
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 113 ++++++++++++++++++++++++++++++++++++
1 file changed, 113 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 05646fe..028fa8f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -39,6 +39,7 @@
#include "intel_ringbuffer.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
+#include "i915_scheduler.h"

enum {
ACTIVE_LIST,
@@ -1123,6 +1124,114 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_next_seqno_fops,
i915_next_seqno_get, i915_next_seqno_set,
"0x%llx\n");

+static int
+i915_scheduler_priority_max_get(void *data, u64 *val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ *val = (u64) scheduler->priority_level_max;
+ return 0;
+}
+
+static int
+i915_scheduler_priority_max_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ scheduler->priority_level_max = (u32) val;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_scheduler_priority_max_fops,
+ i915_scheduler_priority_max_get,
+ i915_scheduler_priority_max_set,
+ "0x%llx\n");
+
+static int
+i915_scheduler_priority_preempt_get(void *data, u64 *val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ *val = (u64) scheduler->priority_level_preempt;
+ return 0;
+}
+
+static int
+i915_scheduler_priority_preempt_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ scheduler->priority_level_preempt = (u32) val;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_scheduler_priority_preempt_fops,
+ i915_scheduler_priority_preempt_get,
+ i915_scheduler_priority_preempt_set,
+ "0x%llx\n");
+
+static int
+i915_scheduler_min_flying_get(void *data, u64 *val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ *val = (u64) scheduler->min_flying;
+ return 0;
+}
+
+static int
+i915_scheduler_min_flying_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ scheduler->min_flying = (u32) val;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_scheduler_min_flying_fops,
+ i915_scheduler_min_flying_get,
+ i915_scheduler_min_flying_set,
+ "0x%llx\n");
+
+static int
+i915_scheduler_file_queue_max_get(void *data, u64 *val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ *val = (u64) scheduler->file_queue_max;
+ return 0;
+}
+
+static int
+i915_scheduler_file_queue_max_set(void *data, u64 val)
+{
+ struct drm_device *dev = data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_scheduler *scheduler = dev_priv->scheduler;
+
+ scheduler->file_queue_max = (u32) val;
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_scheduler_file_queue_max_fops,
+ i915_scheduler_file_queue_max_get,
+ i915_scheduler_file_queue_max_set,
+ "0x%llx\n");
+
static int i915_frequency_info(struct seq_file *m, void *unused)
{
struct drm_info_node *node = m->private;
@@ -5163,6 +5272,10 @@ static const struct i915_debugfs_files {
{"i915_gem_drop_caches", &i915_drop_caches_fops},
{"i915_error_state", &i915_error_state_fops},
{"i915_next_seqno", &i915_next_seqno_fops},
+ {"i915_scheduler_priority_max", &i915_scheduler_priority_max_fops},
+ {"i915_scheduler_priority_preempt", &i915_scheduler_priority_preempt_fops},
+ {"i915_scheduler_min_flying", &i915_scheduler_min_flying_fops},
+ {"i915_scheduler_file_queue_max", &i915_scheduler_file_queue_max_fops},
{"i915_display_crc_ctl", &i915_display_crc_ctl_fops},
{"i915_pri_wm_latency", &i915_pri_wm_latency_fops},
{"i915_spr_wm_latency", &i915_spr_wm_latency_fops},