drm/i915: check context reset stats before relocations

Doing it early prevents moving and relocating objects in vain
for contexts that won't get any GPU time.

Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index b800fe4..9282b4c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -884,6 +884,24 @@ validate_exec_list(struct drm_i915_gem_exec_object2 *exec,
        return 0;
 }
 
+static int
+i915_gem_validate_context(struct drm_device *dev, struct drm_file *file,
+                         const u32 ctx_id)
+{
+       struct i915_ctx_hang_stats *hs;
+
+       hs = i915_gem_context_get_hang_stats(dev, file, ctx_id);
+       if (IS_ERR(hs))
+               return PTR_ERR(hs);
+
+       if (hs->banned) {
+               DRM_DEBUG("Context %u tried to submit while banned\n", ctx_id);
+               return -EIO;
+       }
+
+       return 0;
+}
+
 static void
 i915_gem_execbuffer_move_to_active(struct list_head *vmas,
                                   struct intel_ring_buffer *ring)
@@ -963,8 +981,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
        struct drm_i915_gem_object *batch_obj;
        struct drm_clip_rect *cliprects = NULL;
        struct intel_ring_buffer *ring;
-       struct i915_ctx_hang_stats *hs;
-       u32 ctx_id = i915_execbuffer2_get_context_id(*args);
+       const u32 ctx_id = i915_execbuffer2_get_context_id(*args);
        u32 exec_start, exec_len;
        u32 mask, flags;
        int ret, mode, i;
@@ -1101,6 +1118,12 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
                goto pre_mutex_err;
        }
 
+       ret = i915_gem_validate_context(dev, file, ctx_id);
+       if (ret) {
+               mutex_unlock(&dev->struct_mutex);
+               goto pre_mutex_err;
+       }
+
        eb = eb_create(args);
        if (eb == NULL) {
                mutex_unlock(&dev->struct_mutex);
@@ -1153,17 +1176,6 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
        if (ret)
                goto err;
 
-       hs = i915_gem_context_get_hang_stats(dev, file, ctx_id);
-       if (IS_ERR(hs)) {
-               ret = PTR_ERR(hs);
-               goto err;
-       }
-
-       if (hs->banned) {
-               ret = -EIO;
-               goto err;
-       }
-
        ret = i915_switch_context(ring, file, ctx_id);
        if (ret)
                goto err;