This patch uses jiffies to calculate the huc
load time.This information can be useful for testing
to know how much time huc takes to load.
v2: Remove debugfs entry. Remove local variable
huc_finish_load. (Daniel, Tvrtko)
v3: Use ktime_get() for more accurate timings.
Ensure the load is successful, before load times
is printed. (Tvrtko, Michal)
v4: Rebase. Do not expose the load time variable in a gobal
struct. Use int for load time (Tvrtko, Joonas)
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Oscar Mateo Lozano <oscar.mateo@xxxxxxxxx>
Cc: Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_huc.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
index 98d1725..3e3ce14 100644
--- a/drivers/gpu/drm/i915/intel_huc.c
+++ b/drivers/gpu/drm/i915/intel_huc.c
@@ -127,7 +127,8 @@ static int huc_ucode_xfer(struct intel_uc_fw *huc_fw, struct i915_vma *vma)
struct drm_i915_private *dev_priv = huc_to_i915(huc);
unsigned long offset = 0;
u32 size;
- int ret;
+ int ret, load_time;
+ ktime_t start_load;
GEM_BUG_ON(huc_fw->type != INTEL_UC_FW_TYPE_HUC);
@@ -148,13 +149,19 @@ static int huc_ucode_xfer(struct intel_uc_fw *huc_fw, struct i915_vma *vma)
I915_WRITE(DMA_COPY_SIZE, size);
/* Start the DMA */
+ start_load = ktime_get();
I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(HUC_UKERNEL | START_DMA));
/* Wait for DMA to finish */
ret = intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0, 100);
+ load_time = ktime_ms_delta(ktime_get(), start_load);
+
DRM_DEBUG_DRIVER("HuC DMA transfer wait over with ret %d\n", ret);
+ if (!ret)
+ DRM_DEBUG_DRIVER("HuC is loaded in %d ms\n", load_time);
+
/* Disable the bits once DMA is over */
I915_WRITE(DMA_CTRL, _MASKED_BIT_DISABLE(HUC_UKERNEL));
--
2.7.4
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