1 files changed, 83 insertions, 42 deletions

diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 23d25283616c..b89ca5174863 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -24,7 +24,7 @@
  */
 
 /* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
-#define BO_VALID    0x8000
+#define BO_VALID    0x8000   /* is current addr in cmdstream correct/valid? */
 #define BO_LOCKED   0x4000
 #define BO_PINNED   0x2000
 
@@ -35,21 +35,31 @@ static struct msm_gem_submit *submit_create(struct drm_device *dev,
 	int sz = sizeof(*submit) + (nr * sizeof(submit->bos[0]));
 
 	submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
-	if (submit) {
-		submit->dev = dev;
-		submit->gpu = gpu;
+	if (!submit)
+		return NULL;
 
-		/* initially, until copy_from_user() and bo lookup succeeds: */
-		submit->nr_bos = 0;
-		submit->nr_cmds = 0;
+	submit->dev = dev;
+	submit->gpu = gpu;
+	submit->pid = get_pid(task_pid(current));
 
-		INIT_LIST_HEAD(&submit->bo_list);
-		ww_acquire_init(&submit->ticket, &reservation_ww_class);
-	}
+	/* initially, until copy_from_user() and bo lookup succeeds: */
+	submit->nr_bos = 0;
+	submit->nr_cmds = 0;
+
+	INIT_LIST_HEAD(&submit->bo_list);
+	ww_acquire_init(&submit->ticket, &reservation_ww_class);
 
 	return submit;
 }
 
+void msm_gem_submit_free(struct msm_gem_submit *submit)
+{
+	fence_put(submit->fence);
+	list_del(&submit->node);
+	put_pid(submit->pid);
+	kfree(submit);
+}
+
 static int submit_lookup_objects(struct msm_gem_submit *submit,
 		struct drm_msm_gem_submit *args, struct drm_file *file)
 {
@@ -131,16 +141,13 @@ static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
 }
 
 /* This is where we make sure all the bo's are reserved and pin'd: */
-static int submit_validate_objects(struct msm_gem_submit *submit)
+static int submit_lock_objects(struct msm_gem_submit *submit)
 {
 	int contended, slow_locked = -1, i, ret = 0;
 
 retry:
-	submit->valid = true;
-
 	for (i = 0; i < submit->nr_bos; i++) {
 		struct msm_gem_object *msm_obj = submit->bos[i].obj;
-		uint32_t iova;
 
 		if (slow_locked == i)
 			slow_locked = -1;
@@ -154,30 +161,6 @@ retry:
 				goto fail;
 			submit->bos[i].flags |= BO_LOCKED;
 		}
-
-
-		/* if locking succeeded, pin bo: */
-		ret = msm_gem_get_iova_locked(&msm_obj->base,
-				submit->gpu->id, &iova);
-
-		/* this would break the logic in the fail path.. there is no
-		 * reason for this to happen, but just to be on the safe side
-		 * let's notice if this starts happening in the future:
-		 */
-		WARN_ON(ret == -EDEADLK);
-
-		if (ret)
-			goto fail;
-
-		submit->bos[i].flags |= BO_PINNED;
-
-		if (iova == submit->bos[i].iova) {
-			submit->bos[i].flags |= BO_VALID;
-		} else {
-			submit->bos[i].iova = iova;
-			submit->bos[i].flags &= ~BO_VALID;
-			submit->valid = false;
-		}
 	}
 
 	ww_acquire_done(&submit->ticket);
@@ -206,6 +189,54 @@ fail:
 	return ret;
 }
 
+static int submit_fence_sync(struct msm_gem_submit *submit)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct msm_gem_object *msm_obj = submit->bos[i].obj;
+		bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
+
+		ret = msm_gem_sync_object(&msm_obj->base, submit->gpu->fctx, write);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int submit_pin_objects(struct msm_gem_submit *submit)
+{
+	int i, ret = 0;
+
+	submit->valid = true;
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct msm_gem_object *msm_obj = submit->bos[i].obj;
+		uint32_t iova;
+
+		/* if locking succeeded, pin bo: */
+		ret = msm_gem_get_iova_locked(&msm_obj->base,
+				submit->gpu->id, &iova);
+
+		if (ret)
+			break;
+
+		submit->bos[i].flags |= BO_PINNED;
+
+		if (iova == submit->bos[i].iova) {
+			submit->bos[i].flags |= BO_VALID;
+		} else {
+			submit->bos[i].iova = iova;
+			/* iova changed, so address in cmdstream is not valid: */
+			submit->bos[i].flags &= ~BO_VALID;
+			submit->valid = false;
+		}
+	}
+
+	return ret;
+}
+
 static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
 		struct msm_gem_object **obj, uint32_t *iova, bool *valid)
 {
@@ -297,7 +328,7 @@ static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *ob
 	return 0;
 }
 
-static void submit_cleanup(struct msm_gem_submit *submit, bool fail)
+static void submit_cleanup(struct msm_gem_submit *submit)
 {
 	unsigned i;
 
@@ -344,7 +375,15 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 	if (ret)
 		goto out;
 
-	ret = submit_validate_objects(submit);
+	ret = submit_lock_objects(submit);
+	if (ret)
+		goto out;
+
+	ret = submit_fence_sync(submit);
+	if (ret)
+		goto out;
+
+	ret = submit_pin_objects(submit);
 	if (ret)
 		goto out;
 
@@ -410,10 +449,12 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
 
 	ret = msm_gpu_submit(gpu, submit, ctx);
 
-	args->fence = submit->fence;
+	args->fence = submit->fence->seqno;
 
 out:
-	submit_cleanup(submit, !!ret);
+	submit_cleanup(submit);
+	if (ret)
+		msm_gem_submit_free(submit);
 	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }