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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-04 23:11:31 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-10-05 10:40:06 +0300 |
| commit | 1b36595ffb350c8bec5be8894c5a43f0581864c0 (patch) | |
| tree | 5a9198dabdae00c7be0cb4f2d5d8e88da0cf52f7 /drivers/gpu/drm/i915/intel_engine_cs.c | |
| parent | cdb324bde5700725f04172bbeb6ef0bbbb6886c3 (diff) | |
| download | linux-1b36595ffb350c8bec5be8894c5a43f0581864c0.tar.xz | |
drm/i915: Show RING registers through debugfs
Knowing where the RINGs are pointing is extremely useful in diagnosing
if the engines are executing the ringbuffers you expect - and igt may be
suppressing the usual method of looking in the GPU error state.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161004201132.21801-7-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_engine_cs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_engine_cs.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index e405f1080296..d00ec805f93d 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -334,3 +334,33 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine) intel_engine_cleanup_cmd_parser(engine); i915_gem_batch_pool_fini(&engine->batch_pool); } + +u64 intel_engine_get_active_head(struct intel_engine_cs *engine) +{ + struct drm_i915_private *dev_priv = engine->i915; + u64 acthd; + + if (INTEL_GEN(dev_priv) >= 8) + acthd = I915_READ64_2x32(RING_ACTHD(engine->mmio_base), + RING_ACTHD_UDW(engine->mmio_base)); + else if (INTEL_GEN(dev_priv) >= 4) + acthd = I915_READ(RING_ACTHD(engine->mmio_base)); + else + acthd = I915_READ(ACTHD); + + return acthd; +} + +u64 intel_engine_get_last_batch_head(struct intel_engine_cs *engine) +{ + struct drm_i915_private *dev_priv = engine->i915; + u64 bbaddr; + + if (INTEL_GEN(dev_priv) >= 8) + bbaddr = I915_READ64_2x32(RING_BBADDR(engine->mmio_base), + RING_BBADDR_UDW(engine->mmio_base)); + else + bbaddr = I915_READ(RING_BBADDR(engine->mmio_base)); + + return bbaddr; +} |