1 files changed, 204 insertions, 54 deletions

diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
index 487f96412d35..f4387e1e178d 100644
--- a/drivers/gpu/drm/vc4/vc4_bo.c
+++ b/drivers/gpu/drm/vc4/vc4_bo.c
@@ -24,21 +24,35 @@
 #include "vc4_drv.h"
 #include "uapi/drm/vc4_drm.h"
 
+static const char * const bo_type_names[] = {
+	"kernel",
+	"V3D",
+	"V3D shader",
+	"dumb",
+	"binner",
+	"RCL",
+	"BCL",
+	"kernel BO cache",
+};
+
+static bool is_user_label(int label)
+{
+	return label >= VC4_BO_TYPE_COUNT;
+}
+
 static void vc4_bo_stats_dump(struct vc4_dev *vc4)
 {
-	DRM_INFO("num bos allocated: %d\n",
-		 vc4->bo_stats.num_allocated);
-	DRM_INFO("size bos allocated: %dkb\n",
-		 vc4->bo_stats.size_allocated / 1024);
-	DRM_INFO("num bos used: %d\n",
-		 vc4->bo_stats.num_allocated - vc4->bo_stats.num_cached);
-	DRM_INFO("size bos used: %dkb\n",
-		 (vc4->bo_stats.size_allocated -
-		  vc4->bo_stats.size_cached) / 1024);
-	DRM_INFO("num bos cached: %d\n",
-		 vc4->bo_stats.num_cached);
-	DRM_INFO("size bos cached: %dkb\n",
-		 vc4->bo_stats.size_cached / 1024);
+	int i;
+
+	for (i = 0; i < vc4->num_labels; i++) {
+		if (!vc4->bo_labels[i].num_allocated)
+			continue;
+
+		DRM_INFO("%30s: %6dkb BOs (%d)\n",
+			 vc4->bo_labels[i].name,
+			 vc4->bo_labels[i].size_allocated / 1024,
+			 vc4->bo_labels[i].num_allocated);
+	}
 }
 
 #ifdef CONFIG_DEBUG_FS
@@ -47,30 +61,103 @@ int vc4_bo_stats_debugfs(struct seq_file *m, void *unused)
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
-	struct vc4_bo_stats stats;
+	int i;
 
-	/* Take a snapshot of the current stats with the lock held. */
 	mutex_lock(&vc4->bo_lock);
-	stats = vc4->bo_stats;
+	for (i = 0; i < vc4->num_labels; i++) {
+		if (!vc4->bo_labels[i].num_allocated)
+			continue;
+
+		seq_printf(m, "%30s: %6dkb BOs (%d)\n",
+			   vc4->bo_labels[i].name,
+			   vc4->bo_labels[i].size_allocated / 1024,
+			   vc4->bo_labels[i].num_allocated);
+	}
 	mutex_unlock(&vc4->bo_lock);
 
-	seq_printf(m, "num bos allocated: %d\n",
-		   stats.num_allocated);
-	seq_printf(m, "size bos allocated: %dkb\n",
-		   stats.size_allocated / 1024);
-	seq_printf(m, "num bos used: %d\n",
-		   stats.num_allocated - stats.num_cached);
-	seq_printf(m, "size bos used: %dkb\n",
-		   (stats.size_allocated - stats.size_cached) / 1024);
-	seq_printf(m, "num bos cached: %d\n",
-		   stats.num_cached);
-	seq_printf(m, "size bos cached: %dkb\n",
-		   stats.size_cached / 1024);
-
 	return 0;
 }
 #endif
 
+/* Takes ownership of *name and returns the appropriate slot for it in
+ * the bo_labels[] array, extending it as necessary.
+ *
+ * This is inefficient and could use a hash table instead of walking
+ * an array and strcmp()ing.  However, the assumption is that user
+ * labeling will be infrequent (scanout buffers and other long-lived
+ * objects, or debug driver builds), so we can live with it for now.
+ */
+static int vc4_get_user_label(struct vc4_dev *vc4, const char *name)
+{
+	int i;
+	int free_slot = -1;
+
+	for (i = 0; i < vc4->num_labels; i++) {
+		if (!vc4->bo_labels[i].name) {
+			free_slot = i;
+		} else if (strcmp(vc4->bo_labels[i].name, name) == 0) {
+			kfree(name);
+			return i;
+		}
+	}
+
+	if (free_slot != -1) {
+		WARN_ON(vc4->bo_labels[free_slot].num_allocated != 0);
+		vc4->bo_labels[free_slot].name = name;
+		return free_slot;
+	} else {
+		u32 new_label_count = vc4->num_labels + 1;
+		struct vc4_label *new_labels =
+			krealloc(vc4->bo_labels,
+				 new_label_count * sizeof(*new_labels),
+				 GFP_KERNEL);
+
+		if (!new_labels) {
+			kfree(name);
+			return -1;
+		}
+
+		free_slot = vc4->num_labels;
+		vc4->bo_labels = new_labels;
+		vc4->num_labels = new_label_count;
+
+		vc4->bo_labels[free_slot].name = name;
+		vc4->bo_labels[free_slot].num_allocated = 0;
+		vc4->bo_labels[free_slot].size_allocated = 0;
+
+		return free_slot;
+	}
+}
+
+static void vc4_bo_set_label(struct drm_gem_object *gem_obj, int label)
+{
+	struct vc4_bo *bo = to_vc4_bo(gem_obj);
+	struct vc4_dev *vc4 = to_vc4_dev(gem_obj->dev);
+
+	lockdep_assert_held(&vc4->bo_lock);
+
+	if (label != -1) {
+		vc4->bo_labels[label].num_allocated++;
+		vc4->bo_labels[label].size_allocated += gem_obj->size;
+	}
+
+	vc4->bo_labels[bo->label].num_allocated--;
+	vc4->bo_labels[bo->label].size_allocated -= gem_obj->size;
+
+	if (vc4->bo_labels[bo->label].num_allocated == 0 &&
+	    is_user_label(bo->label)) {
+		/* Free user BO label slots on last unreference.
+		 * Slots are just where we track the stats for a given
+		 * name, and once a name is unused we can reuse that
+		 * slot.
+		 */
+		kfree(vc4->bo_labels[bo->label].name);
+		vc4->bo_labels[bo->label].name = NULL;
+	}
+
+	bo->label = label;
+}
+
 static uint32_t bo_page_index(size_t size)
 {
 	return (size / PAGE_SIZE) - 1;
@@ -80,7 +167,8 @@ static uint32_t bo_page_index(size_t size)
 static void vc4_bo_destroy(struct vc4_bo *bo)
 {
 	struct drm_gem_object *obj = &bo->base.base;
-	struct vc4_dev *vc4 = to_vc4_dev(obj->dev);
+
+	vc4_bo_set_label(obj, -1);
 
 	if (bo->validated_shader) {
 		kfree(bo->validated_shader->texture_samples);
@@ -88,9 +176,6 @@ static void vc4_bo_destroy(struct vc4_bo *bo)
 		bo->validated_shader = NULL;
 	}
 
-	vc4->bo_stats.num_allocated--;
-	vc4->bo_stats.size_allocated -= obj->size;
-
 	reservation_object_fini(&bo->_resv);
 
 	drm_gem_cma_free_object(obj);
@@ -99,12 +184,6 @@ static void vc4_bo_destroy(struct vc4_bo *bo)
 /* Must be called with bo_lock held. */
 static void vc4_bo_remove_from_cache(struct vc4_bo *bo)
 {
-	struct drm_gem_object *obj = &bo->base.base;
-	struct vc4_dev *vc4 = to_vc4_dev(obj->dev);
-
-	vc4->bo_stats.num_cached--;
-	vc4->bo_stats.size_cached -= obj->size;
-
 	list_del(&bo->unref_head);
 	list_del(&bo->size_head);
 }
@@ -165,7 +244,8 @@ static void vc4_bo_cache_purge(struct drm_device *dev)
 }
 
 static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev,
-					    uint32_t size)
+					    uint32_t size,
+					    enum vc4_kernel_bo_type type)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
 	uint32_t page_index = bo_page_index(size);
@@ -186,6 +266,8 @@ static struct vc4_bo *vc4_bo_get_from_cache(struct drm_device *dev,
 	kref_init(&bo->base.base.refcount);
 
 out:
+	if (bo)
+		vc4_bo_set_label(&bo->base.base, type);
 	mutex_unlock(&vc4->bo_lock);
 	return bo;
 }
@@ -208,8 +290,9 @@ struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size)
 		return ERR_PTR(-ENOMEM);
 
 	mutex_lock(&vc4->bo_lock);
-	vc4->bo_stats.num_allocated++;
-	vc4->bo_stats.size_allocated += size;
+	bo->label = VC4_BO_TYPE_KERNEL;
+	vc4->bo_labels[VC4_BO_TYPE_KERNEL].num_allocated++;
+	vc4->bo_labels[VC4_BO_TYPE_KERNEL].size_allocated += size;
 	mutex_unlock(&vc4->bo_lock);
 	bo->resv = &bo->_resv;
 	reservation_object_init(bo->resv);
@@ -218,7 +301,7 @@ struct drm_gem_object *vc4_create_object(struct drm_device *dev, size_t size)
 }
 
 struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
-			     bool allow_unzeroed)
+			     bool allow_unzeroed, enum vc4_kernel_bo_type type)
 {
 	size_t size = roundup(unaligned_size, PAGE_SIZE);
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
@@ -229,7 +312,7 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
 		return ERR_PTR(-EINVAL);
 
 	/* First, try to get a vc4_bo from the kernel BO cache. */
-	bo = vc4_bo_get_from_cache(dev, size);
+	bo = vc4_bo_get_from_cache(dev, size, type);
 	if (bo) {
 		if (!allow_unzeroed)
 			memset(bo->base.vaddr, 0, bo->base.base.size);
@@ -251,7 +334,13 @@ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t unaligned_size,
 			return ERR_PTR(-ENOMEM);
 		}
 	}
-	return to_vc4_bo(&cma_obj->base);
+	bo = to_vc4_bo(&cma_obj->base);
+
+	mutex_lock(&vc4->bo_lock);
+	vc4_bo_set_label(&cma_obj->base, type);
+	mutex_unlock(&vc4->bo_lock);
+
+	return bo;
 }
 
 int vc4_dumb_create(struct drm_file *file_priv,
@@ -268,7 +357,7 @@ int vc4_dumb_create(struct drm_file *file_priv,
 	if (args->size < args->pitch * args->height)
 		args->size = args->pitch * args->height;
 
-	bo = vc4_bo_create(dev, args->size, false);
+	bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_DUMB);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
 
@@ -348,8 +437,7 @@ void vc4_free_object(struct drm_gem_object *gem_bo)
 	list_add(&bo->size_head, cache_list);
 	list_add(&bo->unref_head, &vc4->bo_cache.time_list);
 
-	vc4->bo_stats.num_cached++;
-	vc4->bo_stats.size_cached += gem_bo->size;
+	vc4_bo_set_label(&bo->base.base, VC4_BO_TYPE_KERNEL_CACHE);
 
 	vc4_bo_cache_free_old(dev);
 
@@ -483,7 +571,7 @@ int vc4_create_bo_ioctl(struct drm_device *dev, void *data,
 	 * We can't allocate from the BO cache, because the BOs don't
 	 * get zeroed, and that might leak data between users.
 	 */
-	bo = vc4_bo_create(dev, args->size, false);
+	bo = vc4_bo_create(dev, args->size, false, VC4_BO_TYPE_V3D);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
 
@@ -536,7 +624,7 @@ vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
 		return -EINVAL;
 	}
 
-	bo = vc4_bo_create(dev, args->size, true);
+	bo = vc4_bo_create(dev, args->size, true, VC4_BO_TYPE_V3D_SHADER);
 	if (IS_ERR(bo))
 		return PTR_ERR(bo);
 
@@ -651,9 +739,24 @@ int vc4_get_tiling_ioctl(struct drm_device *dev, void *data,
 	return 0;
 }
 
-void vc4_bo_cache_init(struct drm_device *dev)
+int vc4_bo_cache_init(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
+	int i;
+
+	/* Create the initial set of BO labels that the kernel will
+	 * use.  This lets us avoid a bunch of string reallocation in
+	 * the kernel's draw and BO allocation paths.
+	 */
+	vc4->bo_labels = kcalloc(VC4_BO_TYPE_COUNT, sizeof(*vc4->bo_labels),
+				 GFP_KERNEL);
+	if (!vc4->bo_labels)
+		return -ENOMEM;
+	vc4->num_labels = VC4_BO_TYPE_COUNT;
+
+	BUILD_BUG_ON(ARRAY_SIZE(bo_type_names) != VC4_BO_TYPE_COUNT);
+	for (i = 0; i < VC4_BO_TYPE_COUNT; i++)
+		vc4->bo_labels[i].name = bo_type_names[i];
 
 	mutex_init(&vc4->bo_lock);
 
@@ -663,19 +766,66 @@ void vc4_bo_cache_init(struct drm_device *dev)
 	setup_timer(&vc4->bo_cache.time_timer,
 		    vc4_bo_cache_time_timer,
 		    (unsigned long)dev);
+
+	return 0;
 }
 
 void vc4_bo_cache_destroy(struct drm_device *dev)
 {
 	struct vc4_dev *vc4 = to_vc4_dev(dev);
+	int i;
 
 	del_timer(&vc4->bo_cache.time_timer);
 	cancel_work_sync(&vc4->bo_cache.time_work);
 
 	vc4_bo_cache_purge(dev);
 
-	if (vc4->bo_stats.num_allocated) {
-		DRM_ERROR("Destroying BO cache while BOs still allocated:\n");
-		vc4_bo_stats_dump(vc4);
+	for (i = 0; i < vc4->num_labels; i++) {
+		if (vc4->bo_labels[i].num_allocated) {
+			DRM_ERROR("Destroying BO cache with %d %s "
+				  "BOs still allocated\n",
+				  vc4->bo_labels[i].num_allocated,
+				  vc4->bo_labels[i].name);
+		}
+
+		if (is_user_label(i))
+			kfree(vc4->bo_labels[i].name);
 	}
+	kfree(vc4->bo_labels);
+}
+
+int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
+		       struct drm_file *file_priv)
+{
+	struct vc4_dev *vc4 = to_vc4_dev(dev);
+	struct drm_vc4_label_bo *args = data;
+	char *name;
+	struct drm_gem_object *gem_obj;
+	int ret = 0, label;
+
+	if (!args->len)
+		return -EINVAL;
+
+	name = strndup_user(u64_to_user_ptr(args->name), args->len + 1);
+	if (IS_ERR(name))
+		return PTR_ERR(name);
+
+	gem_obj = drm_gem_object_lookup(file_priv, args->handle);
+	if (!gem_obj) {
+		DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);
+		kfree(name);
+		return -ENOENT;
+	}
+
+	mutex_lock(&vc4->bo_lock);
+	label = vc4_get_user_label(vc4, name);
+	if (label != -1)
+		vc4_bo_set_label(gem_obj, label);
+	else
+		ret = -ENOMEM;
+	mutex_unlock(&vc4->bo_lock);
+
+	drm_gem_object_unreference_unlocked(gem_obj);
+
+	return ret;
 }