diff mbox

[07/15] drm/i915: Stop using obj->obj_exec_link outside of execbuf

Message ID 20170223161830.26965-8-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Chris Wilson Feb. 23, 2017, 4:18 p.m. UTC
i915_gem_stolen_list_info() sneakily takes advantage of the
obj->obj_exec_link to save itself from having to allocate. Enough of the
subterfuge, just allocate an array of pointers and sort them instead of
the list.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 52 ++++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 24 deletions(-)

Comments

Mika Kuoppala Feb. 24, 2017, 12:32 p.m. UTC | #1
Chris Wilson <chris@chris-wilson.co.uk> writes:

> i915_gem_stolen_list_info() sneakily takes advantage of the
> obj->obj_exec_link to save itself from having to allocate. Enough of the
> subterfuge, just allocate an array of pointers and sort them instead of
> the list.
>

Justifiable by itself but I suspect you have plans for mutex.

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>

> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 52 ++++++++++++++++++++-----------------
>  1 file changed, 28 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index ddae8e442176..75efa1ae234e 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -27,7 +27,7 @@
>   */
>  
>  #include <linux/debugfs.h>
> -#include <linux/list_sort.h>
> +#include <linux/sort.h>
>  #include "intel_drv.h"
>  
>  static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
> @@ -230,13 +230,12 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
>  		seq_printf(m, " (frontbuffer: 0x%03x)", frontbuffer_bits);
>  }
>  
> -static int obj_rank_by_stolen(void *priv,
> -			      struct list_head *A, struct list_head *B)
> +static int obj_rank_by_stolen(const void *A, const void *B)
>  {
> -	struct drm_i915_gem_object *a =
> -		container_of(A, struct drm_i915_gem_object, obj_exec_link);
> -	struct drm_i915_gem_object *b =
> -		container_of(B, struct drm_i915_gem_object, obj_exec_link);
> +	const struct drm_i915_gem_object *a =
> +		*(const struct drm_i915_gem_object **)A;
> +	const struct drm_i915_gem_object *b =
> +		*(const struct drm_i915_gem_object **)B;
>  
>  	if (a->stolen->start < b->stolen->start)
>  		return -1;
> @@ -249,49 +248,54 @@ static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
>  {
>  	struct drm_i915_private *dev_priv = node_to_i915(m->private);
>  	struct drm_device *dev = &dev_priv->drm;
> +	struct drm_i915_gem_object **objects;
>  	struct drm_i915_gem_object *obj;
>  	u64 total_obj_size, total_gtt_size;
> -	LIST_HEAD(stolen);
> -	int count, ret;
> +	unsigned long count, n;
> +	int ret;
>  
>  	ret = mutex_lock_interruptible(&dev->struct_mutex);
>  	if (ret)
>  		return ret;
>  
> +	objects = drm_malloc_ab(dev_priv->mm.object_count, sizeof(*objects));
> +	if (!objects) {
> +		ret = -ENOMEM;
> +		goto out_unlock;
> +	}
> +
>  	total_obj_size = total_gtt_size = count = 0;
>  	list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) {
>  		if (obj->stolen == NULL)
>  			continue;
>  
> -		list_add(&obj->obj_exec_link, &stolen);
> -
> +		objects[count++] = obj;
>  		total_obj_size += obj->base.size;
>  		total_gtt_size += i915_gem_obj_total_ggtt_size(obj);
> -		count++;
>  	}
>  	list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) {
>  		if (obj->stolen == NULL)
>  			continue;
>  
> -		list_add(&obj->obj_exec_link, &stolen);
> -
> +		objects[count++] = obj;
>  		total_obj_size += obj->base.size;
> -		count++;
>  	}
> -	list_sort(NULL, &stolen, obj_rank_by_stolen);
> +
> +	sort(objects, count, sizeof(*objects), obj_rank_by_stolen, NULL);
> +
>  	seq_puts(m, "Stolen:\n");
> -	while (!list_empty(&stolen)) {
> -		obj = list_first_entry(&stolen, typeof(*obj), obj_exec_link);
> +	for (n = 0; n < count; n++) {
>  		seq_puts(m, "   ");
> -		describe_obj(m, obj);
> +		describe_obj(m, objects[n]);
>  		seq_putc(m, '\n');
> -		list_del_init(&obj->obj_exec_link);
>  	}
> -	mutex_unlock(&dev->struct_mutex);
> -
> -	seq_printf(m, "Total %d objects, %llu bytes, %llu GTT size\n",
> +	seq_printf(m, "Total %lu objects, %llu bytes, %llu GTT size\n",
>  		   count, total_obj_size, total_gtt_size);
> -	return 0;
> +
> +	drm_free_large(objects);
> +out_unlock:
> +	mutex_unlock(&dev->struct_mutex);
> +	return ret;
>  }
>  
>  struct file_stats {
> -- 
> 2.11.0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index ddae8e442176..75efa1ae234e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -27,7 +27,7 @@ 
  */
 
 #include <linux/debugfs.h>
-#include <linux/list_sort.h>
+#include <linux/sort.h>
 #include "intel_drv.h"
 
 static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
@@ -230,13 +230,12 @@  describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
 		seq_printf(m, " (frontbuffer: 0x%03x)", frontbuffer_bits);
 }
 
-static int obj_rank_by_stolen(void *priv,
-			      struct list_head *A, struct list_head *B)
+static int obj_rank_by_stolen(const void *A, const void *B)
 {
-	struct drm_i915_gem_object *a =
-		container_of(A, struct drm_i915_gem_object, obj_exec_link);
-	struct drm_i915_gem_object *b =
-		container_of(B, struct drm_i915_gem_object, obj_exec_link);
+	const struct drm_i915_gem_object *a =
+		*(const struct drm_i915_gem_object **)A;
+	const struct drm_i915_gem_object *b =
+		*(const struct drm_i915_gem_object **)B;
 
 	if (a->stolen->start < b->stolen->start)
 		return -1;
@@ -249,49 +248,54 @@  static int i915_gem_stolen_list_info(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_i915_gem_object **objects;
 	struct drm_i915_gem_object *obj;
 	u64 total_obj_size, total_gtt_size;
-	LIST_HEAD(stolen);
-	int count, ret;
+	unsigned long count, n;
+	int ret;
 
 	ret = mutex_lock_interruptible(&dev->struct_mutex);
 	if (ret)
 		return ret;
 
+	objects = drm_malloc_ab(dev_priv->mm.object_count, sizeof(*objects));
+	if (!objects) {
+		ret = -ENOMEM;
+		goto out_unlock;
+	}
+
 	total_obj_size = total_gtt_size = count = 0;
 	list_for_each_entry(obj, &dev_priv->mm.bound_list, global_link) {
 		if (obj->stolen == NULL)
 			continue;
 
-		list_add(&obj->obj_exec_link, &stolen);
-
+		objects[count++] = obj;
 		total_obj_size += obj->base.size;
 		total_gtt_size += i915_gem_obj_total_ggtt_size(obj);
-		count++;
 	}
 	list_for_each_entry(obj, &dev_priv->mm.unbound_list, global_link) {
 		if (obj->stolen == NULL)
 			continue;
 
-		list_add(&obj->obj_exec_link, &stolen);
-
+		objects[count++] = obj;
 		total_obj_size += obj->base.size;
-		count++;
 	}
-	list_sort(NULL, &stolen, obj_rank_by_stolen);
+
+	sort(objects, count, sizeof(*objects), obj_rank_by_stolen, NULL);
+
 	seq_puts(m, "Stolen:\n");
-	while (!list_empty(&stolen)) {
-		obj = list_first_entry(&stolen, typeof(*obj), obj_exec_link);
+	for (n = 0; n < count; n++) {
 		seq_puts(m, "   ");
-		describe_obj(m, obj);
+		describe_obj(m, objects[n]);
 		seq_putc(m, '\n');
-		list_del_init(&obj->obj_exec_link);
 	}
-	mutex_unlock(&dev->struct_mutex);
-
-	seq_printf(m, "Total %d objects, %llu bytes, %llu GTT size\n",
+	seq_printf(m, "Total %lu objects, %llu bytes, %llu GTT size\n",
 		   count, total_obj_size, total_gtt_size);
-	return 0;
+
+	drm_free_large(objects);
+out_unlock:
+	mutex_unlock(&dev->struct_mutex);
+	return ret;
 }
 
 struct file_stats {