From 8c123e549fd1533f371b7877d4c0458ba3a30b22 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Mon, 4 Mar 2013 17:00:29 -0800 Subject: [PATCH] drm/i915: Capture current context on error On error, this represents the state of the currently running context at the time it was loaded. Unfortunately, since we're hung and can't switch out the context this may not tell us too much about the most current state of the context, but does give clues about what has happened since loading. Thanks to recent doc updates, we have a little more confidence regarding what is actually in this memory, and perhaps it will help us gain more insight into certain bugs. AFAICT, the most interesting info is in the first page. To save space, we only capture the first page. In the future, we might want to dump more. Sample of the relevant part of error state: render ring --- HW Context = 0x01b20000 [0000] 00000000 1100105f 00002028 ffff0880 [0010] 0000209c feff4040 000020c0 efdf0080 [0020] 00002178 00000001 0000217c 00145855 [0030] 00002310 00000000 00002314 00000000 v2: Move error collection to the ring error code Change format of dump to not confuse intel_error_decode (Chris) Put the context error object with the others (Chris) Don't search bound_list instead of active_list (chris) v3: extract and flatten context recording (daniel) checkpatch related fixes for the copypasta in debugfs v4: bug in v3 (Daniel) - if ((ring->id == RCS) && error->ccid) + if ((ring->id != RCS) || !error->ccid) References: https://bugs.freedesktop.org/show_bug.cgi?id=55845 Reviewed-by (v2): Chris Wilson Signed-off-by: Ben Widawsky Cc: Daniel Vetter [danvet: Bikeshed away the redudant parenthese around ring->id != RCS] Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 17 +++++++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 2 +- drivers/gpu/drm/i915/i915_irq.c | 23 +++++++++++++++++++++++ 3 files changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 7c65ab83914..c92ae7ff471 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -772,6 +772,23 @@ static int i915_error_state(struct seq_file *m, void *unused) } } } + + obj = error->ring[i].ctx; + if (obj) { + seq_printf(m, "%s --- HW Context = 0x%08x\n", + dev_priv->ring[i].name, + obj->gtt_offset); + offset = 0; + for (elt = 0; elt < PAGE_SIZE/16; elt += 4) { + seq_printf(m, "[%04x] %08x %08x %08x %08x\n", + offset, + obj->pages[0][elt], + obj->pages[0][elt+1], + obj->pages[0][elt+2], + obj->pages[0][elt+3]); + offset += 16; + } + } } if (error->overlay) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 669a535e82f..ca6b215c090 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -243,7 +243,7 @@ struct drm_i915_error_state { int page_count; u32 gtt_offset; u32 *pages[0]; - } *ringbuffer, *batchbuffer; + } *ringbuffer, *batchbuffer, *ctx; struct drm_i915_error_request { long jiffies; u32 seqno; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 12561f2f7fd..2139714b2a6 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1242,6 +1242,26 @@ static void i915_record_ring_state(struct drm_device *dev, error->cpu_ring_tail[ring->id] = ring->tail; } + +static void i915_gem_record_active_context(struct intel_ring_buffer *ring, + struct drm_i915_error_state *error, + struct drm_i915_error_ring *ering) +{ + struct drm_i915_private *dev_priv = ring->dev->dev_private; + struct drm_i915_gem_object *obj; + + /* Currently render ring is the only HW context user */ + if (ring->id != RCS || !error->ccid) + return; + + list_for_each_entry(obj, &dev_priv->mm.bound_list, gtt_list) { + if ((error->ccid & PAGE_MASK) == obj->gtt_offset) { + ering->ctx = i915_error_object_create_sized(dev_priv, + obj, 1); + } + } +} + static void i915_gem_record_rings(struct drm_device *dev, struct drm_i915_error_state *error) { @@ -1259,6 +1279,9 @@ static void i915_gem_record_rings(struct drm_device *dev, error->ring[i].ringbuffer = i915_error_object_create(dev_priv, ring->obj); + + i915_gem_record_active_context(ring, error, &error->ring[i]); + count = 0; list_for_each_entry(request, &ring->request_list, list) count++; -- 2.46.0