drm/sis: track obj->drm_fd relations in the driver

By attach a driver private struct to each open drm fd.

Because we steal the owner_list from drm_sman until things settle,
use list_move instead of list_add.

This requires to export a drm_sman function temporarily before
drm_sman will die for real completely.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/drm_sman.c

@@ -244,7 +244,7 @@ struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int man
 
 EXPORT_SYMBOL(drm_sman_alloc);
 
-static void drm_sman_free(struct drm_memblock_item *item)
+void drm_sman_free(struct drm_memblock_item *item)
 {
 	struct drm_sman *sman = item->sman;
 
@@ -253,6 +253,7 @@ static void drm_sman_free(struct drm_memblock_item *item)
 	item->mm->free(item->mm->private, item->mm_info);
 	kfree(item);
 }
+EXPORT_SYMBOL(drm_sman_free);
 
 int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
 {

drivers/gpu/drm/sis/sis_drv.c

@@ -76,10 +76,35 @@ static const struct file_operations sis_driver_fops = {
 	.llseek = noop_llseek,
 };
 
+static int sis_driver_open(struct drm_device *dev, struct drm_file *file)
+{
+	struct sis_file_private *file_priv;
+
+	DRM_DEBUG_DRIVER("\n");
+	file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
+	if (!file_priv)
+		return -ENOMEM;
+
+	file->driver_priv = file_priv;
+
+	INIT_LIST_HEAD(&file_priv->obj_list);
+
+	return 0;
+}
+
+void sis_driver_postclose(struct drm_device *dev, struct drm_file *file)
+{
+	struct sis_file_private *file_priv = file->driver_priv;
+
+	kfree(file_priv);
+}
+
 static struct drm_driver driver = {
 	.driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR,
 	.load = sis_driver_load,
 	.unload = sis_driver_unload,
+	.open = sis_driver_open,
+	.postclose = sis_driver_postclose,
 	.dma_quiescent = sis_idle,
 	.reclaim_buffers = NULL,
 	.reclaim_buffers_idlelocked = sis_reclaim_buffers_locked,

drivers/gpu/drm/sis/sis_mm.c

@@ -120,13 +120,14 @@ static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file
 	return 0;
 }
 
-static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
+static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 			 void *data, int pool)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_mem_t *mem = data;
 	int retval = 0;
 	struct drm_memblock_item *item;
+	struct sis_file_private *file_priv = file->driver_priv;
 
 	mutex_lock(&dev->struct_mutex);
 
@@ -139,11 +140,10 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
 	}
 
 	mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
-	item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0,
-			      (unsigned long)file_priv);
+	item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0, 0);
 
-	mutex_unlock(&dev->struct_mutex);
 	if (item) {
+		list_move(&item->owner_list, &file_priv->obj_list);
 		mem->offset = ((pool == 0) ?
 			      dev_priv->vram_offset : dev_priv->agp_offset) +
 		    (item->mm->
@@ -156,6 +156,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file_priv,
 		mem->free = 0;
 		retval = -ENOMEM;
 	}
+	mutex_unlock(&dev->struct_mutex);
 
 	DRM_DEBUG("alloc %d, size = %d, offset = %d\n", pool, mem->size,
 		  mem->offset);
@@ -301,12 +302,13 @@ void sis_lastclose(struct drm_device *dev)
 }
 
 void sis_reclaim_buffers_locked(struct drm_device *dev,
-				struct drm_file *file_priv)
+				struct drm_file *file)
 {
-	drm_sis_private_t *dev_priv = dev->dev_private;
+	struct sis_file_private *file_priv = file->driver_priv;
+	struct drm_memblock_item *entry, *next;
 
 	mutex_lock(&dev->struct_mutex);
-	if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
+	if (list_empty(&file_priv->obj_list)) {
 		mutex_unlock(&dev->struct_mutex);
 		return;
 	}
@@ -314,7 +316,11 @@ void sis_reclaim_buffers_locked(struct drm_device *dev,
 	if (dev->driver->dma_quiescent)
 		dev->driver->dma_quiescent(dev);
 
-	drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
+
+	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
+				 owner_list) {
+		drm_sman_free(entry);
+	}
 	mutex_unlock(&dev->struct_mutex);
 	return;
 }

include/drm/drm_sman.h

@@ -146,6 +146,7 @@ extern struct drm_memblock_item *drm_sman_alloc(struct drm_sman * sman,
  */
 
 extern int drm_sman_free_key(struct drm_sman * sman, unsigned int key);
+extern void drm_sman_free(struct drm_memblock_item *item);
 
 /*
  * returns 1 iff there are no stale memory blocks associated with this owner.

include/drm/sis_drm.h

@@ -64,4 +64,8 @@ typedef struct {
 	unsigned int offset, size;
 } drm_sis_fb_t;
 
+struct sis_file_private {
+	struct list_head obj_list;
+};
+
 #endif				/* __SIS_DRM_H__ */