From: Praveen Diwakar <praveen.diwakar@xxxxxxxxx>
This patch will select optimum eu/slice/sub-slice configuration based on type
of load (low, medium, high) as input.
Based on our readings and experiments we have predefined set of optimum
configuration for each platform(CHT, KBL).
i915_set_optimum_config will select optimum configuration from pre-defined
optimum configuration table(opt_config).
Change-Id: I3a6a2a6bdddd01b3d3c97995f5403aef3c6fa989
Signed-off-by: Praveen Diwakar <praveen.diwakar@xxxxxxxxx>
Signed-off-by: Yogesh Marathe <yogesh.marathe@xxxxxxxxx>
Signed-off-by: Aravindan Muthukumar <aravindan.muthukumar@xxxxxxxxx>
Signed-off-by: Kedar J Karanje <kedar.j.karanje@xxxxxxxxx>
Signed-off-by: Ankit Navik <ankit.p.navik@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_context.c | 46 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_gem_context.h | 32 +++++++++++++++++++++++
2 files changed, 78 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 2838c1d..1b76410 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -94,6 +94,32 @@
#define ALL_L3_SLICES(dev) (1 << NUM_L3_SLICES(dev)) - 1
+static struct optimum_config opt_config[TIER_VERSION_MAX][LOAD_TYPE_MAX] = {
+ {
+ /* Cherry trail low */
+ { 1, 1, 4},
+ /* Cherry trail medium */
+ { 1, 1, 6},
+ /* Cherry trail high */
+ { 1, 2, 6}
+ },
+ {
+ /* kbl gt2 low */
+ { 2, 3, 4},
+ /* kbl gt2 medium */
+ { 2, 3, 6},
+ /* kbl gt2 high */
+ { 2, 3, 8}
+ },
+ {
+ /* kbl gt3 low */
+ { 2, 3, 4},
+ /* kbl gt3 medium */
+ { 2, 3, 6},
+ /* kbl gt3 high */
+ { 2, 3, 8}
+ }
+};
static void lut_close(struct i915_gem_context *ctx)
{
struct i915_lut_handle *lut, *ln;
@@ -393,10 +419,30 @@ i915_gem_create_context(struct drm_i915_private *dev_priv,
ctx->subslice_cnt = hweight8(
INTEL_INFO(dev_priv)->sseu.subslice_mask[0]);
ctx->eu_cnt = INTEL_INFO(dev_priv)->sseu.eu_per_subslice;
+ ctx->load_type = 0;
+ ctx->prev_load_type = 0;
return ctx;
}
+
+void i915_set_optimum_config(int type, struct i915_gem_context *ctx,
+ enum gem_tier_versions version)
+{
+ struct intel_context *ce = &ctx->__engine[RCS];
+ u32 *reg_state = ce->lrc_reg_state;
+ u32 rpcs_config = 0;
+ /* Call opt_config to get correct configuration for eu,slice,subslice */
+ ctx->slice_cnt = (u8)opt_config[version][type].slice;
+ ctx->subslice_cnt = (u8)opt_config[version][type].subslice;
+ ctx->eu_cnt = (u8)opt_config[version][type].eu;
+
+ /* Enabling this to update the rpcs */
+ if (ctx->prev_load_type != type)
+ ctx->update_render_config = 1;
+
+ ctx->prev_load_type = type;
+}
/**
* i915_gem_context_create_gvt - create a GVT GEM context
* @dev: drm device *
diff --git a/drivers/gpu/drm/i915/i915_gem_context.h b/drivers/gpu/drm/i915/i915_gem_context.h
index 52e341c..50183e6 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.h
+++ b/drivers/gpu/drm/i915/i915_gem_context.h
@@ -53,6 +53,26 @@ struct intel_context_ops {
void (*destroy)(struct intel_context *ce);
};
+enum gem_load_type {
+ LOAD_TYPE_LOW,
+ LOAD_TYPE_MEDIUM,
+ LOAD_TYPE_HIGH,
+ LOAD_TYPE_MAX
+};
+
+enum gem_tier_versions {
+ CHERRYVIEW = 0,
+ KABYLAKE_GT2,
+ KABYLAKE_GT3,
+ TIER_VERSION_MAX
+};
+
+struct optimum_config {
+ int slice;
+ int subslice;
+ int eu;
+};
+
/**
* struct i915_gem_context - client state
*
@@ -210,6 +230,16 @@ struct i915_gem_context {
/** eu_cnt: used to set the # of eu to be enabled. */
u8 eu_cnt;
+ /** load_type: The designated load_type (high/medium/low) for a given
+ * number of pending commands in the command queue.
+ */
+ u8 load_type;
+
+ /** prev_load_type: The earlier load type that the GPU was configured
+ * for (high/medium/low).
+ */
+ u8 prev_load_type;
+
/** update_render_config: to track the updates to the render
* configuration (S/SS/EU Configuration on the GPU)
*/
@@ -342,6 +372,8 @@ int i915_gem_context_setparam_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int i915_gem_context_reset_stats_ioctl(struct drm_device *dev, void *data,
struct drm_file *file);
+void i915_set_optimum_config(int type, struct i915_gem_context *ctx,
+ enum gem_tier_versions version);
struct i915_gem_context *
i915_gem_context_create_kernel(struct drm_i915_private *i915, int prio);
--
2.7.4
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