drm/i915: Dump the whole context object.

As we've learned over time, the HW context is just a series of GPU
commands that we're able to decode without any changes in
intel_error_decode. Since many bugs recently have been implicated in
the HW context state, it makes sense to dump the whole context object
in a form which can be parsed.

Sample:
render ring --- HW Context = 0x042db000
ringbuffer (render ring) at 0x0160c000; HEAD points to: 0x0160c000
0x0160c000:      0x00000000: MI_NOOP
0x0160c004:      0x00000000: MI_NOOP
0x0160c008:      0x00000000: MI_NOOP
0x0160c00c:      0x00000000: MI_NOOP
0x0160c010:      0x00000000: MI_NOOP
0x0160c014:      0x00000000: MI_NOOP
0x0160c018:      0x00000000: MI_NOOP
0x0160c01c:      0x00000000: MI_NOOP

Unfortunately, our decoder isn't quite smart enough to deal with the
variable length LRIs - but that is a tools problem.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
[danvet: Clarify commit message a bit, seems to have lost a few
crucial words.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 1005af0..4865ade 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -453,16 +453,7 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
                        err_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) {
-                               err_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;
-                       }
+                       print_error_obj(m, obj);
                }
        }
 
@@ -878,10 +869,7 @@ static void i915_gem_record_active_context(struct intel_ring_buffer *ring,
 
        list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
                if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj)) {
-                       ering->ctx = i915_error_object_create_sized(dev_priv,
-                                                                   obj,
-                                                                   &dev_priv->gtt.base,
-                                                                   1);
+                       ering->ctx = i915_error_ggtt_object_create(dev_priv, obj);
                        break;
                }
        }