This patch introduces an option for configuring the ring buffer size
of a LRC context after the context creation.
v8:
- Rename the data member in i915_gem_context. (Chris)
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Zhi Wang <zhi.a.wang@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem_context.c | 1 +
drivers/gpu/drm/i915/intel_lrc.c | 3 ++-
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e25d761..66fdb8d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -878,6 +878,7 @@ struct i915_gem_context {
int pin_count;
bool initialised;
} engine[I915_NUM_ENGINES];
+ u32 ring_size;
struct list_head link;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index a3b11aa..b722fa1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -295,6 +295,7 @@ __create_hw_context(struct drm_device *dev,
ctx->remap_slice = ALL_L3_SLICES(dev_priv);
ctx->hang_stats.ban_period_seconds = DRM_I915_CTX_BAN_PERIOD;
+ ctx->ring_size = 4 * PAGE_SIZE;
return ctx;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index cbc84e6..344b5d3 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -2478,7 +2478,8 @@ static int execlists_context_deferred_alloc(struct i915_gem_context *ctx,
return PTR_ERR(ctx_obj);
}
- ringbuf = intel_engine_create_ringbuffer(engine, 4 * PAGE_SIZE);
+ ringbuf = intel_engine_create_ringbuffer(engine,
+ ctx->ring_size);
if (IS_ERR(ringbuf)) {
ret = PTR_ERR(ringbuf);
goto error_deref_obj;
--
1.9.1
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