drm/sman: rip out owner tracking

In contrast to kms drivers, sis/via _always_ associated a buffer with
a drm fd. So by the time we reach lastclose, all open drm fds are gone
and with them their associated objects.

So when sis/via call drm_sman_cleanup in their lastclose funcs, that
will free 0 objects.

The owner tracking now serves no purpose at all, hence rip it ou. We
can't kill the corresponding fields in struct drm_memblock_item yet
because we hijack these in the new driver private owner tracking. But
now that drm_sman.c doesn't touch ->owner_list anymore, we need to
kill the list_move hack and properly add the item to the file_priv
list.

Also leave the list_del(&obj->owner_list) in drm_sman_free for the
moment, it will move to the drivers when sman disappears completely.

v2: Remove the redundant INIT_LIST_HEAD as noted by Chris Wilson

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

3 files changed, 2 insertions, 73 deletions

diff --git a/drivers/gpu/drm/drm_sman.c b/drivers/gpu/drm/drm_sman.c
index 9d03cdc1a914..af4728477a90 100644
--- a/drivers/gpu/drm/drm_sman.c
+++ b/drivers/gpu/drm/drm_sman.c
@@ -48,7 +48,6 @@ struct drm_owner_item {
 void drm_sman_takedown(struct drm_sman * sman)
 {
         drm_ht_remove(&sman->user_hash_tab);
-        drm_ht_remove(&sman->owner_hash_tab);
         kfree(sman->mm);
 }
 
@@ -66,16 +65,10 @@ drm_sman_init(struct drm_sman * sman, unsigned int num_managers,
                 goto out;
         }
         sman->num_managers = num_managers;
-        INIT_LIST_HEAD(&sman->owner_items);
-        ret = drm_ht_create(&sman->owner_hash_tab, owner_order);
-        if (ret)
-                goto out1;
         ret = drm_ht_create(&sman->user_hash_tab, user_order);
         if (!ret)
                 goto out;
 
-        drm_ht_remove(&sman->owner_hash_tab);
-out1:
         kfree(sman->mm);
 out:
         return ret;
@@ -161,44 +154,12 @@ drm_sman_set_manager(struct drm_sman * sman, unsigned int manager,
 }
 EXPORT_SYMBOL(drm_sman_set_manager);
 
-static struct drm_owner_item *drm_sman_get_owner_item(struct drm_sman * sman,
-                                                 unsigned long owner)
-{
-        int ret;
-        struct drm_hash_item *owner_hash_item;
-        struct drm_owner_item *owner_item;
-
-        ret = drm_ht_find_item(&sman->owner_hash_tab, owner, &owner_hash_item);
-        if (!ret) {
-                return drm_hash_entry(owner_hash_item, struct drm_owner_item,
-                                      owner_hash);
-        }
-
-        owner_item = kzalloc(sizeof(*owner_item), GFP_KERNEL);
-        if (!owner_item)
-                goto out;
-
-        INIT_LIST_HEAD(&owner_item->mem_blocks);
-        owner_item->owner_hash.key = owner;
-        if (drm_ht_insert_item(&sman->owner_hash_tab, &owner_item->owner_hash))
-                goto out1;
-
-        list_add_tail(&owner_item->sman_list, &sman->owner_items);
-        return owner_item;
-
-out1:
-        kfree(owner_item);
-out:
-        return NULL;
-}
-
 struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int manager,
                                     unsigned long size, unsigned alignment,
                                     unsigned long owner)
 {
         void *tmp;
         struct drm_sman_mm *sman_mm;
-        struct drm_owner_item *owner_item;
         struct drm_memblock_item *memblock;
 
         BUG_ON(manager >= sman->num_managers);
@@ -224,16 +185,8 @@ struct drm_memblock_item *drm_sman_alloc(struct drm_sman *sman, unsigned int man
              (unsigned long)memblock, 32, 0, 0))
                 goto out1;
 
-        owner_item = drm_sman_get_owner_item(sman, owner);
-        if (!owner_item)
-                goto out2;
-
-        list_add_tail(&memblock->owner_list, &owner_item->mem_blocks);
-
         return memblock;
 
-out2:
-        drm_ht_remove_item(&sman->user_hash_tab, &memblock->user_hash);
 out1:
         kfree(memblock);
 out:
@@ -271,35 +224,11 @@ int drm_sman_free_key(struct drm_sman *sman, unsigned int key)
 
 EXPORT_SYMBOL(drm_sman_free_key);
 
-static void drm_sman_remove_owner(struct drm_sman *sman,
-                                  struct drm_owner_item *owner_item)
-{
-        list_del(&owner_item->sman_list);
-        drm_ht_remove_item(&sman->owner_hash_tab, &owner_item->owner_hash);
-        kfree(owner_item);
-}
-
-static void drm_sman_do_owner_cleanup(struct drm_sman *sman,
-                                      struct drm_owner_item *owner_item)
-{
-        struct drm_memblock_item *entry, *next;
-
-        list_for_each_entry_safe(entry, next, &owner_item->mem_blocks,
-                                 owner_list) {
-                drm_sman_free(entry);
-        }
-        drm_sman_remove_owner(sman, owner_item);
-}
-
 void drm_sman_cleanup(struct drm_sman *sman)
 {
-        struct drm_owner_item *entry, *next;
         unsigned int i;
         struct drm_sman_mm *sman_mm;
 
-        list_for_each_entry_safe(entry, next, &sman->owner_items, sman_list) {
-                drm_sman_do_owner_cleanup(sman, entry);
-        }
         if (sman->mm) {
                 for (i = 0; i < sman->num_managers; ++i) {
                         sman_mm = &sman->mm[i];
diff --git a/drivers/gpu/drm/sis/sis_mm.c b/drivers/gpu/drm/sis/sis_mm.c
index a70b1bbff2e6..c76a118812a9 100644
--- a/drivers/gpu/drm/sis/sis_mm.c
+++ b/drivers/gpu/drm/sis/sis_mm.c
@@ -143,7 +143,7 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
         item = drm_sman_alloc(&dev_priv->sman, pool, mem->size, 0, 0);
 
         if (item) {
-                list_move(&item->owner_list, &file_priv->obj_list);
+                list_add(&item->owner_list, &file_priv->obj_list);
                 mem->offset = ((pool == 0) ?
                               dev_priv->vram_offset : dev_priv->agp_offset) +
                     (item->mm->
diff --git a/drivers/gpu/drm/via/via_mm.c b/drivers/gpu/drm/via/via_mm.c
index 19bb77cdeb46..e0110bc27606 100644
--- a/drivers/gpu/drm/via/via_mm.c
+++ b/drivers/gpu/drm/via/via_mm.c
@@ -141,7 +141,7 @@ int via_mem_alloc(struct drm_device *dev, void *data,
         item = drm_sman_alloc(&dev_priv->sman, mem->type, tmpSize, 0, 0);
 
         if (item) {
-                list_move(&item->owner_list, &file_priv->obj_list);
+                list_add(&item->owner_list, &file_priv->obj_list);
                 mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
                               dev_priv->vram_offset : dev_priv->agp_offset) +
                     (item->mm->