drm/i915: Record the error batchbuffer on each ring

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

3 files changed, 50 insertions, 120 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9c4cdc143be9..a7c194a837a3 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -750,7 +750,9 @@ static int i915_error_state(struct seq_file *m, void *unused)
                 if (error->batchbuffer[i]) {
                         struct drm_i915_error_object *obj = error->batchbuffer[i];
 
-                        seq_printf(m, "--- gtt_offset = 0x%08x\n", obj->gtt_offset);
+                        seq_printf(m, "%s --- gtt_offset = 0x%08x\n",
+                                   dev_priv->ring[i].name,
+                                   obj->gtt_offset);
                         offset = 0;
                         for (page = 0; page < obj->page_count; page++) {
                                 for (elt = 0; elt < PAGE_SIZE/4; elt++) {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3e78314514a2..6c9a042737d6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -172,7 +172,7 @@ struct drm_i915_error_state {
                 int page_count;
                 u32 gtt_offset;
                 u32 *pages[0];
-        } *ringbuffer, *batchbuffer[2];
+        } *ringbuffer, *batchbuffer[I915_NUM_RINGS];
         struct drm_i915_error_buffer {
                 size_t size;
                 u32 name;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index d431fc4fb84b..cf61235b858f 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -566,10 +566,9 @@ static void i915_error_work_func(struct work_struct *work)
 
 #ifdef CONFIG_DEBUG_FS
 static struct drm_i915_error_object *
-i915_error_object_create(struct drm_device *dev,
+i915_error_object_create(struct drm_i915_private *dev_priv,
                          struct drm_i915_gem_object *src)
 {
-        drm_i915_private_t *dev_priv = dev->dev_private;
         struct drm_i915_error_object *dst;
         int page, page_count;
         u32 reloc_offset;
@@ -642,52 +641,6 @@ i915_error_state_free(struct drm_device *dev,
         kfree(error);
 }
 
-static u32
-i915_get_bbaddr(struct drm_device *dev, u32 *ring)
-{
-        u32 cmd;
-
-        if (IS_I830(dev) || IS_845G(dev))
-                cmd = MI_BATCH_BUFFER;
-        else if (INTEL_INFO(dev)->gen >= 4)
-                cmd = (MI_BATCH_BUFFER_START | (2 << 6) |
-                       MI_BATCH_NON_SECURE_I965);
-        else
-                cmd = (MI_BATCH_BUFFER_START | (2 << 6));
-
-        return ring[0] == cmd ? ring[1] : 0;
-}
-
-static u32
-i915_ringbuffer_last_batch(struct drm_device *dev,
-                           struct intel_ring_buffer *ring)
-{
-        struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 head, bbaddr;
-        u32 *val;
-
-        /* Locate the current position in the ringbuffer and walk back
-         * to find the most recently dispatched batch buffer.
-         */
-        head = I915_READ_HEAD(ring) & HEAD_ADDR;
-
-        val = (u32 *)(ring->virtual_start + head);
-        while (--val >= (u32 *)ring->virtual_start) {
-                bbaddr = i915_get_bbaddr(dev, val);
-                if (bbaddr)
-                        return bbaddr;
-        }
-
-        val = (u32 *)(ring->virtual_start + ring->size);
-        while (--val >= (u32 *)ring->virtual_start) {
-                bbaddr = i915_get_bbaddr(dev, val);
-                if (bbaddr)
-                        return bbaddr;
-        }
-
-        return 0;
-}
-
 static u32 capture_bo_list(struct drm_i915_error_buffer *err,
                            int count,
                            struct list_head *head)
@@ -751,6 +704,36 @@ static void i915_gem_record_fences(struct drm_device *dev,
         }
 }
 
+static struct drm_i915_error_object *
+i915_error_first_batchbuffer(struct drm_i915_private *dev_priv,
+                             struct intel_ring_buffer *ring)
+{
+        struct drm_i915_gem_object *obj;
+        u32 seqno;
+
+        if (!ring->get_seqno)
+                return NULL;
+
+        seqno = ring->get_seqno(ring);
+        list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
+                if (obj->ring != ring)
+                        continue;
+
+                if (!i915_seqno_passed(obj->last_rendering_seqno, seqno))
+                        continue;
+
+                if ((obj->base.read_domains & I915_GEM_DOMAIN_COMMAND) == 0)
+                        continue;
+
+                /* We need to copy these to an anonymous buffer as the simplest
+                 * method to avoid being overwritten by userspace.
+                 */
+                return i915_error_object_create(dev_priv, obj);
+        }
+
+        return NULL;
+}
+
 /**
  * i915_capture_error_state - capture an error record for later analysis
  * @dev: drm device
@@ -765,10 +748,8 @@ static void i915_capture_error_state(struct drm_device *dev)
         struct drm_i915_private *dev_priv = dev->dev_private;
         struct drm_i915_gem_object *obj;
         struct drm_i915_error_state *error;
-        struct drm_i915_gem_object *batchbuffer[2];
         unsigned long flags;
-        u32 bbaddr;
-        int count;
+        int i;
 
         spin_lock_irqsave(&dev_priv->error_lock, flags);
         error = dev_priv->first_error;
@@ -827,83 +808,30 @@ static void i915_capture_error_state(struct drm_device *dev)
         }
         i915_gem_record_fences(dev, error);
 
-        bbaddr = i915_ringbuffer_last_batch(dev, &dev_priv->ring[RCS]);
-
-        /* Grab the current batchbuffer, most likely to have crashed. */
-        batchbuffer[0] = NULL;
-        batchbuffer[1] = NULL;
-        count = 0;
-        list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list) {
-                if (batchbuffer[0] == NULL &&
-                    bbaddr >= obj->gtt_offset &&
-                    bbaddr < obj->gtt_offset + obj->base.size)
-                        batchbuffer[0] = obj;
-
-                if (batchbuffer[1] == NULL &&
-                    error->acthd >= obj->gtt_offset &&
-                    error->acthd < obj->gtt_offset + obj->base.size)
-                        batchbuffer[1] = obj;
-
-                count++;
-        }
-        /* Scan the other lists for completeness for those bizarre errors. */
-        if (batchbuffer[0] == NULL || batchbuffer[1] == NULL) {
-                list_for_each_entry(obj, &dev_priv->mm.flushing_list, mm_list) {
-                        if (batchbuffer[0] == NULL &&
-                            bbaddr >= obj->gtt_offset &&
-                            bbaddr < obj->gtt_offset + obj->base.size)
-                                batchbuffer[0] = obj;
-
-                        if (batchbuffer[1] == NULL &&
-                            error->acthd >= obj->gtt_offset &&
-                            error->acthd < obj->gtt_offset + obj->base.size)
-                                batchbuffer[1] = obj;
-
-                        if (batchbuffer[0] && batchbuffer[1])
-                                break;
-                }
-        }
-        if (batchbuffer[0] == NULL || batchbuffer[1] == NULL) {
-                list_for_each_entry(obj, &dev_priv->mm.inactive_list, mm_list) {
-                        if (batchbuffer[0] == NULL &&
-                            bbaddr >= obj->gtt_offset &&
-                            bbaddr < obj->gtt_offset + obj->base.size)
-                                batchbuffer[0] = obj;
-
-                        if (batchbuffer[1] == NULL &&
-                            error->acthd >= obj->gtt_offset &&
-                            error->acthd < obj->gtt_offset + obj->base.size)
-                                batchbuffer[1] = obj;
-
-                        if (batchbuffer[0] && batchbuffer[1])
-                                break;
-                }
-        }
-
-        /* We need to copy these to an anonymous buffer as the simplest
-         * method to avoid being overwritten by userspace.
-         */
-        error->batchbuffer[0] = i915_error_object_create(dev, batchbuffer[0]);
-        if (batchbuffer[1] != batchbuffer[0])
-                error->batchbuffer[1] = i915_error_object_create(dev, batchbuffer[1]);
-        else
-                error->batchbuffer[1] = NULL;
+        /* Record the active batchbuffers */
+        for (i = 0; i < I915_NUM_RINGS; i++)
+                error->batchbuffer[i] =
+                        i915_error_first_batchbuffer(dev_priv,
+                                                     &dev_priv->ring[i]);
 
         /* Record the ringbuffer */
-        error->ringbuffer = i915_error_object_create(dev,
+        error->ringbuffer = i915_error_object_create(dev_priv,
                                                      dev_priv->ring[RCS].obj);
 
         /* Record buffers on the active and pinned lists. */
         error->active_bo = NULL;
         error->pinned_bo = NULL;
 
-        error->active_bo_count = count;
+        i = 0;
+        list_for_each_entry(obj, &dev_priv->mm.active_list, mm_list)
+                i++;
+        error->active_bo_count = i;
         list_for_each_entry(obj, &dev_priv->mm.pinned_list, mm_list)
-                count++;
-        error->pinned_bo_count = count - error->active_bo_count;
+                i++;
+        error->pinned_bo_count = i - error->active_bo_count;
 
-        if (count) {
-                error->active_bo = kmalloc(sizeof(*error->active_bo)*count,
+        if (i) {
+                error->active_bo = kmalloc(sizeof(*error->active_bo)*i,
                                            GFP_ATOMIC);
                 if (error->active_bo)
                         error->pinned_bo =