Make the interface more symmetric by providing and using a
ttm_resource_cursor_init().
v10:
- Fix a stray newline (Matthew Brost)
- Update kerneldoc (Matthew Brost)
Signed-off-by: Thomas Hellström <thomas.hellst...@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.br...@intel.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
drivers/gpu/drm/ttm/ttm_bo_util.c | 3 ++-
drivers/gpu/drm/ttm/ttm_resource.c | 35 ++++++++++++++++++++----------
include/drm/ttm/ttm_resource.h | 11 +++++-----
4 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 320592435252..06a237d420dc 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -450,7 +450,8 @@ int ttm_bo_evict_first(struct ttm_device *bdev, struct
ttm_resource_manager *man
int ret = 0;
spin_lock(&bdev->lru_lock);
- res = ttm_resource_manager_first(man, &cursor);
+ ttm_resource_cursor_init(&cursor, man);
+ res = ttm_resource_manager_first(&cursor);
ttm_resource_cursor_fini(&cursor);
if (!res) {
ret = -ENOENT;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c
b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 3c07f4712d5c..454a51239614 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -865,7 +865,8 @@ s64 ttm_lru_walk_for_evict(struct ttm_lru_walk *walk,
struct ttm_device *bdev,
s64 lret;
spin_lock(&bdev->lru_lock);
- ttm_resource_manager_for_each_res(man, &cursor, res) {
+ ttm_resource_cursor_init(&cursor, man);
+ ttm_resource_manager_for_each_res(&cursor, res) {
struct ttm_buffer_object *bo = res->bo;
bool bo_needs_unlock = false;
bool bo_locked = false;
diff --git a/drivers/gpu/drm/ttm/ttm_resource.c
b/drivers/gpu/drm/ttm/ttm_resource.c
index 6d764ba88aab..2b69229f127c 100644
--- a/drivers/gpu/drm/ttm/ttm_resource.c
+++ b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -80,6 +80,23 @@ static void ttm_bulk_move_drop_cursors(struct
ttm_lru_bulk_move *bulk)
ttm_resource_cursor_clear_bulk(cursor);
}
+/**
+ * ttm_resource_cursor_init() - Initialize a struct ttm_resource_cursor
+ * @cursor: The cursor to initialize.
+ * @man: The resource manager.
+ *
+ * Initialize the cursor before using it for iteration.
+ */
+void ttm_resource_cursor_init(struct ttm_resource_cursor *cursor,
+ struct ttm_resource_manager *man)
+{
+ cursor->priority = 0;
+ cursor->man = man;
+ ttm_lru_item_init(&cursor->hitch, TTM_LRU_HITCH);
+ INIT_LIST_HEAD(&cursor->bulk_link);
+ INIT_LIST_HEAD(&cursor->hitch.link);
+}
+
/**
* ttm_resource_cursor_fini() - Finalize the LRU list cursor usage
* @cursor: The struct ttm_resource_cursor to finalize.
@@ -577,7 +594,6 @@ ttm_resource_cursor_check_bulk(struct ttm_resource_cursor
*cursor,
/**
* ttm_resource_manager_first() - Start iterating over the resources
* of a resource manager
- * @man: resource manager to iterate over
* @cursor: cursor to record the position
*
* Initializes the cursor and starts iterating. When done iterating,
@@ -586,17 +602,16 @@ ttm_resource_cursor_check_bulk(struct ttm_resource_cursor
*cursor,
* Return: The first resource from the resource manager.
*/
struct ttm_resource *
-ttm_resource_manager_first(struct ttm_resource_manager *man,
- struct ttm_resource_cursor *cursor)
+ttm_resource_manager_first(struct ttm_resource_cursor *cursor)
{
- lockdep_assert_held(&man->bdev->lru_lock);
+ struct ttm_resource_manager *man = cursor->man;
- cursor->priority = 0;
- cursor->man = man;
- ttm_lru_item_init(&cursor->hitch, TTM_LRU_HITCH);
- INIT_LIST_HEAD(&cursor->bulk_link);
- list_add(&cursor->hitch.link, &man->lru[cursor->priority]);
+ if (WARN_ON_ONCE(!man))
+ return NULL;
+
+ lockdep_assert_held(&man->bdev->lru_lock);
+ list_move(&cursor->hitch.link, &man->lru[cursor->priority]);
return ttm_resource_manager_next(cursor);
}
@@ -632,8 +647,6 @@ ttm_resource_manager_next(struct ttm_resource_cursor
*cursor)
ttm_resource_cursor_clear_bulk(cursor);
}
- ttm_resource_cursor_fini(cursor);
-
return NULL;
}
diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
index be034be56ba1..e1f3b95d73b6 100644
--- a/include/drm/ttm/ttm_resource.h
+++ b/include/drm/ttm/ttm_resource.h
@@ -325,6 +325,9 @@ struct ttm_resource_cursor {
unsigned int priority;
};
+void ttm_resource_cursor_init(struct ttm_resource_cursor *cursor,
+ struct ttm_resource_manager *man);
+
void ttm_resource_cursor_fini(struct ttm_resource_cursor *cursor);
/**
@@ -456,8 +459,7 @@ void ttm_resource_manager_debug(struct ttm_resource_manager
*man,
struct drm_printer *p);
struct ttm_resource *
-ttm_resource_manager_first(struct ttm_resource_manager *man,
- struct ttm_resource_cursor *cursor);
+ttm_resource_manager_first(struct ttm_resource_cursor *cursor);
struct ttm_resource *
ttm_resource_manager_next(struct ttm_resource_cursor *cursor);
@@ -466,14 +468,13 @@ ttm_lru_first_res_or_null(struct list_head *head);
/**
* ttm_resource_manager_for_each_res - iterate over all resources
- * @man: the resource manager
* @cursor: struct ttm_resource_cursor for the current position
* @res: the current resource
*
* Iterate over all the evictable resources in a resource manager.
*/
-#define ttm_resource_manager_for_each_res(man, cursor, res) \
- for (res = ttm_resource_manager_first(man, cursor); res; \
+#define ttm_resource_manager_for_each_res(cursor, res) \
+ for (res = ttm_resource_manager_first(cursor); res; \
res = ttm_resource_manager_next(cursor))
struct ttm_kmap_iter *
--
2.46.0
