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drm/i915: Record ring->start address in error state 

This is mostly useful for execlists where the rings switch between
contexts (and so checking that the ring's start register matches the
context is important).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2015-04-07 16:20:47 +01:00 committed by Daniel Vetter
parent b0da1b79aa
commit 94f8cf109e
2 changed files with 7 additions and 4 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -455,6 +455,7 @@ struct drm_i915_error_state {
u32 semaphore_seqno[I915_NUM_RINGS - 1];
/* Register state */
u32 start;
u32 tail;
u32 head;
u32 ctl;

2
drivers/gpu/drm/i915/i915_gpu_error.c
View File

@ -251,6 +251,7 @@ static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
return;
err_printf(m, "%s command stream:\n", ring_str(ring_idx));
err_printf(m, " START: 0x%08x\n", ring->start);
err_printf(m, " HEAD: 0x%08x\n", ring->head);
err_printf(m, " TAIL: 0x%08x\n", ring->tail);
err_printf(m, " CTL: 0x%08x\n", ring->ctl);
@ -883,6 +884,7 @@ static void i915_record_ring_state(struct drm_device *dev,
ering->instpm = I915_READ(RING_INSTPM(ring->mmio_base));
ering->seqno = ring->get_seqno(ring, false);
ering->acthd = intel_ring_get_active_head(ring);
ering->start = I915_READ_START(ring);
ering->head = I915_READ_HEAD(ring);
ering->tail = I915_READ_TAIL(ring);
ering->ctl = I915_READ_CTL(ring);