Add tracek to the RPS events (interrupts, worker, enabling, threshold
selection, frequency setting), so that if we have to debug reticent HW
we have some traces to start from.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_rps.c | 47 ++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 4dcfae16a7ce..42275e25ea1b 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -82,6 +82,8 @@ static void rps_enable_interrupts(struct intel_rps *rps)
GEN6_PM_RP_DOWN_THRESHOLD |
GEN6_PM_RP_DOWN_TIMEOUT);
WRITE_ONCE(rps->pm_events, events);
+ GT_TRACE(gt, "interrupts:on rps->pm_events: %x, rps_pm_mask:%x\n",
+ events, rps_pm_mask(rps, rps->last_freq));
spin_lock_irq(>->irq_lock);
gen6_gt_pm_enable_irq(gt, rps->pm_events);
@@ -140,6 +142,7 @@ static void rps_disable_interrupts(struct intel_rps *rps)
cancel_work_sync(&rps->work);
rps_reset_interrupts(rps);
+ GT_TRACE(gt, "interrupts:off\n");
}
static const struct cparams {
@@ -581,6 +584,10 @@ static void rps_set_power(struct intel_rps *rps, int new_power)
if (IS_VALLEYVIEW(i915))
goto skip_hw_write;
+ GT_TRACE(rps_to_gt(rps),
+ "changing power mode [%d], up %d%% @ %dus, down %d%% @ %dus\n",
+ new_power, threshold_up, ei_up, threshold_down, ei_down);
+
set(uncore, GEN6_RP_UP_EI, GT_INTERVAL_FROM_US(i915, ei_up));
set(uncore, GEN6_RP_UP_THRESHOLD,
GT_INTERVAL_FROM_US(i915, ei_up * threshold_up / 100));
@@ -645,6 +652,8 @@ static void gen6_rps_set_thresholds(struct intel_rps *rps, u8 val)
void intel_rps_mark_interactive(struct intel_rps *rps, bool interactive)
{
+ GT_TRACE(rps_to_gt(rps), "mark interactive: %s\n", yesno(interactive));
+
mutex_lock(&rps->power.mutex);
if (interactive) {
if (!rps->power.interactive++ && READ_ONCE(rps->active))
@@ -672,6 +681,9 @@ static int gen6_rps_set(struct intel_rps *rps, u8 val)
GEN6_AGGRESSIVE_TURBO);
set(uncore, GEN6_RPNSWREQ, swreq);
+ GT_TRACE(rps_to_gt(rps), "set val:%x, freq:%d, swreq:%x\n",
+ val, intel_gpu_freq(rps, val), swreq);
+
return 0;
}
@@ -684,6 +696,9 @@ static int vlv_rps_set(struct intel_rps *rps, u8 val)
err = vlv_punit_write(i915, PUNIT_REG_GPU_FREQ_REQ, val);
vlv_punit_put(i915);
+ GT_TRACE(rps_to_gt(rps), "set val:%x, freq:%d\n",
+ val, intel_gpu_freq(rps, val));
+
return err;
}
@@ -717,6 +732,8 @@ void intel_rps_unpark(struct intel_rps *rps)
if (!rps->enabled)
return;
+ GT_TRACE(rps_to_gt(rps), "unpark:%x\n", rps->cur_freq);
+
/*
* Use the user's desired frequency as a guide, but for better
* performance, jump directly to RPe as our starting frequency.
@@ -784,6 +801,8 @@ void intel_rps_park(struct intel_rps *rps)
*/
rps->cur_freq =
max_t(int, round_down(rps->cur_freq - 1, 2), rps->min_freq);
+
+ GT_TRACE(rps_to_gt(rps), "park:%x\n", rps->cur_freq);
}
void intel_rps_boost(struct i915_request *rq)
@@ -800,6 +819,9 @@ void intel_rps_boost(struct i915_request *rq)
!dma_fence_is_signaled_locked(&rq->fence)) {
set_bit(I915_FENCE_FLAG_BOOST, &rq->fence.flags);
+ GT_TRACE(rps_to_gt(rps), "boost fence:%llx:%llx\n",
+ rq->fence.context, rq->fence.seqno);
+
if (!atomic_fetch_inc(&rps->num_waiters) &&
READ_ONCE(rps->cur_freq) < rps->boost_freq)
schedule_work(&rps->work);
@@ -895,6 +917,7 @@ static void gen6_rps_init(struct intel_rps *rps)
static bool rps_reset(struct intel_rps *rps)
{
struct drm_i915_private *i915 = rps_to_i915(rps);
+
/* force a reset */
rps->power.mode = -1;
rps->last_freq = -1;
@@ -1215,11 +1238,17 @@ void intel_rps_enable(struct intel_rps *rps)
if (!rps->enabled)
return;
- drm_WARN_ON(&i915->drm, rps->max_freq < rps->min_freq);
- drm_WARN_ON(&i915->drm, rps->idle_freq > rps->max_freq);
+ GT_TRACE(rps_to_gt(rps),
+ "min:%x, max:%x, freq:[%d, %d]\n",
+ rps->min_freq, rps->max_freq,
+ intel_gpu_freq(rps, rps->min_freq),
+ intel_gpu_freq(rps, rps->max_freq));
+
+ GEM_BUG_ON(rps->max_freq < rps->min_freq);
+ GEM_BUG_ON(rps->idle_freq > rps->max_freq);
- drm_WARN_ON(&i915->drm, rps->efficient_freq < rps->min_freq);
- drm_WARN_ON(&i915->drm, rps->efficient_freq > rps->max_freq);
+ GEM_BUG_ON(rps->efficient_freq < rps->min_freq);
+ GEM_BUG_ON(rps->efficient_freq > rps->max_freq);
}
static void gen6_rps_disable(struct intel_rps *rps)
@@ -1487,6 +1516,12 @@ static void rps_work(struct work_struct *work)
max = rps->max_freq_softlimit;
if (client_boost)
max = rps->max_freq;
+
+ GT_TRACE(gt,
+ "pm_iir:%x, client_boost:%s, last:%d, cur:%x, min:%x, max:%x\n",
+ pm_iir, yesno(client_boost),
+ adj, new_freq, min, max);
+
if (client_boost && new_freq < rps->boost_freq) {
new_freq = rps->boost_freq;
adj = 0;
@@ -1561,6 +1596,8 @@ void gen11_rps_irq_handler(struct intel_rps *rps, u32 pm_iir)
if (unlikely(!events))
return;
+ GT_TRACE(gt, "irq events:%x\n", events);
+
gen6_gt_pm_mask_irq(gt, events);
rps->pm_iir |= events;
@@ -1576,6 +1613,8 @@ void gen6_rps_irq_handler(struct intel_rps *rps, u32 pm_iir)
if (events) {
spin_lock(>->irq_lock);
+ GT_TRACE(gt, "irq events:%x\n", events);
+
gen6_gt_pm_mask_irq(gt, events);
rps->pm_iir |= events;
--
2.20.1
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