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drm/i915/bdw: collect semaphore error state 

Since the semaphore information is in an object, just dump it, and let
the user parse it later.

NOTE: The page being used for the semaphores are incoherent with the
CPU. No matter what I do, I cannot figure out a way to read anything but
0s. Note that the semaphore waits are indeed working.

v2: Don't print signal, and wait (they should be the same). Instead,
print sync_seqno (Chris)

v3: Free the semaphore error object (Chris)

v4: Fix semaphore offset calculation during error state collection
(Ville)

v5: VCS2 rebase
Make semaphore object error capture coding style consistent (Ville)
Do the proper math for the signal offset (Ville)

v6: Fix small conflicts on rebase and s/ring_buffer/engine_cs (Rodrigo)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2014-06-30 09:53:41 -07:00 committed by Daniel Vetter
parent 87f85ebc8d
commit 0ca36d7839
2 changed files with 48 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -324,6 +324,7 @@ struct drm_i915_error_state {
u64 fence[I915_MAX_NUM_FENCES];
struct intel_overlay_error_state *overlay;
struct intel_display_error_state *display;
struct drm_i915_error_object *semaphore_obj;
struct drm_i915_error_ring {
bool valid;

51
drivers/gpu/drm/i915/i915_gpu_error.c
View File

@ -327,6 +327,7 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
struct drm_device *dev = error_priv->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_error_state *error = error_priv->error;
struct drm_i915_error_object *obj;
int i, j, offset, elt;
int max_hangcheck_score;
@ -395,8 +396,6 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
error->pinned_bo_count[0]);
for (i = 0; i < ARRAY_SIZE(error->ring); i++) {
struct drm_i915_error_object *obj;
obj = error->ring[i].batchbuffer;
if (obj) {
err_puts(m, dev_priv->ring[i].name);
@ -459,6 +458,18 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
}
}
if ((obj = error->semaphore_obj)) {
err_printf(m, "Semaphore page = 0x%08x\n", obj->gtt_offset);
for (elt = 0; elt < PAGE_SIZE/16; elt += 4) {
err_printf(m, "[%04x] %08x %08x %08x %08x\n",
elt * 4,
obj->pages[0][elt],
obj->pages[0][elt+1],
obj->pages[0][elt+2],
obj->pages[0][elt+3]);
}
}
if (error->overlay)
intel_overlay_print_error_state(m, error->overlay);
@ -529,6 +540,7 @@ static void i915_error_state_free(struct kref *error_ref)
kfree(error->ring[i].requests);
}
i915_error_object_free(error->semaphore_obj);
kfree(error->active_bo);
kfree(error->overlay);
kfree(error->display);
@ -747,6 +759,33 @@ static void i915_gem_record_fences(struct drm_device *dev,
}
static void gen8_record_semaphore_state(struct drm_i915_private *dev_priv,
struct drm_i915_error_state *error,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
{
struct intel_engine_cs *useless;
int i;
if (!i915_semaphore_is_enabled(dev_priv->dev))
return;
if (!error->semaphore_obj)
error->semaphore_obj =
i915_error_object_create(dev_priv,
dev_priv->semaphore_obj,
&dev_priv->gtt.base);
for_each_ring(useless, dev_priv, i) {
u16 signal_offset =
(GEN8_SIGNAL_OFFSET(ring, i) & PAGE_MASK) / 4;
u32 *tmp = error->semaphore_obj->pages[0];
ering->semaphore_mboxes[i] = tmp[signal_offset];
ering->semaphore_seqno[i] = ring->semaphore.sync_seqno[i];
}
}
static void gen6_record_semaphore_state(struct drm_i915_private *dev_priv,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
@ -764,6 +803,7 @@ static void gen6_record_semaphore_state(struct drm_i915_private *dev_priv,
}
static void i915_record_ring_state(struct drm_device *dev,
struct drm_i915_error_state *error,
struct intel_engine_cs *ring,
struct drm_i915_error_ring *ering)
{
@ -772,7 +812,10 @@ static void i915_record_ring_state(struct drm_device *dev,
if (INTEL_INFO(dev)->gen >= 6) {
ering->rc_psmi = I915_READ(ring->mmio_base + 0x50);
ering->fault_reg = I915_READ(RING_FAULT_REG(ring));
gen6_record_semaphore_state(dev_priv, ring, ering);
if (INTEL_INFO(dev)->gen >= 8)
gen8_record_semaphore_state(dev_priv, error, ring, ering);
else
gen6_record_semaphore_state(dev_priv, ring, ering);
}
if (INTEL_INFO(dev)->gen >= 4) {
@ -901,7 +944,7 @@ static void i915_gem_record_rings(struct drm_device *dev,
error->ring[i].valid = true;
i915_record_ring_state(dev, ring, &error->ring[i]);
i915_record_ring_state(dev, error, ring, &error->ring[i]);
request = i915_gem_find_active_request(ring);
if (request) {