Commit 685987c6 authored by Ben Widawsky's avatar Ben Widawsky Committed by Daniel Vetter

drm/i915: Identify active VM for batchbuffer capture

Using the current state of the page directory registers, we can
determine which of our address spaces was active when the hang occurred.
This allows us to scan through all the address spaces to identify the
"active" one during error capture.

v2: Rebased for BDW error detection. BDW error detection is similar
except instead of PP_DIR_BASE, we can use the PDP registers.
Signed-off-by: default avatarBen Widawsky <ben@bwidawsk.net>
[danvet: Add FIXME about global gtt misuse.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 496bfcb9
...@@ -655,6 +655,32 @@ static void i915_gem_record_fences(struct drm_device *dev, ...@@ -655,6 +655,32 @@ static void i915_gem_record_fences(struct drm_device *dev,
} }
} }
/* This assumes all batchbuffers are executed from the PPGTT. It might have to
* change in the future. */
static bool is_active_vm(struct i915_address_space *vm,
struct intel_ring_buffer *ring)
{
struct drm_device *dev = vm->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_hw_ppgtt *ppgtt;
if (INTEL_INFO(dev)->gen < 7)
return i915_is_ggtt(vm);
/* FIXME: This ignores that the global gtt vm is also on this list. */
ppgtt = container_of(vm, struct i915_hw_ppgtt, base);
if (INTEL_INFO(dev)->gen >= 8) {
u64 pdp0 = (u64)I915_READ(GEN8_RING_PDP_UDW(ring, 0)) << 32;
pdp0 |= I915_READ(GEN8_RING_PDP_LDW(ring, 0));
return pdp0 == ppgtt->pd_dma_addr[0];
} else {
u32 pp_db;
pp_db = I915_READ(RING_PP_DIR_BASE(ring));
return (pp_db >> 10) == ppgtt->pd_offset;
}
}
static struct drm_i915_error_object * static struct drm_i915_error_object *
i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
struct intel_ring_buffer *ring) struct intel_ring_buffer *ring)
...@@ -662,6 +688,7 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, ...@@ -662,6 +688,7 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
struct i915_address_space *vm; struct i915_address_space *vm;
struct i915_vma *vma; struct i915_vma *vma;
struct drm_i915_gem_object *obj; struct drm_i915_gem_object *obj;
bool found_active = false;
u32 seqno; u32 seqno;
if (!ring->get_seqno) if (!ring->get_seqno)
...@@ -681,6 +708,11 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, ...@@ -681,6 +708,11 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
seqno = ring->get_seqno(ring, false); seqno = ring->get_seqno(ring, false);
list_for_each_entry(vm, &dev_priv->vm_list, global_link) { list_for_each_entry(vm, &dev_priv->vm_list, global_link) {
if (!is_active_vm(vm, ring))
continue;
found_active = true;
list_for_each_entry(vma, &vm->active_list, mm_list) { list_for_each_entry(vma, &vm->active_list, mm_list) {
obj = vma->obj; obj = vma->obj;
if (obj->ring != ring) if (obj->ring != ring)
...@@ -699,6 +731,7 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv, ...@@ -699,6 +731,7 @@ i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
} }
} }
WARN_ON(!found_active);
return NULL; return NULL;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment