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path: root/drivers/gpu/drm/drm_mm.c
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Diffstat (limited to 'drivers/gpu/drm/drm_mm.c')
-rw-r--r--drivers/gpu/drm/drm_mm.c96
1 files changed, 63 insertions, 33 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 2aa331499f81..db1e2d6f90d7 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -102,20 +102,6 @@ int drm_mm_pre_get(struct drm_mm *mm)
}
EXPORT_SYMBOL(drm_mm_pre_get);
-static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)
-{
- return hole_node->start + hole_node->size;
-}
-
-static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)
-{
- struct drm_mm_node *next_node =
- list_entry(hole_node->node_list.next, struct drm_mm_node,
- node_list);
-
- return next_node->start;
-}
-
static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
struct drm_mm_node *node,
unsigned long size, unsigned alignment,
@@ -127,7 +113,7 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
unsigned long adj_start = hole_start;
unsigned long adj_end = hole_end;
- BUG_ON(!hole_node->hole_follows || node->allocated);
+ BUG_ON(node->allocated);
if (mm->color_adjust)
mm->color_adjust(hole_node, color, &adj_start, &adj_end);
@@ -155,12 +141,57 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
BUG_ON(node->start + node->size > adj_end);
node->hole_follows = 0;
- if (node->start + node->size < hole_end) {
+ if (__drm_mm_hole_node_start(node) < hole_end) {
list_add(&node->hole_stack, &mm->hole_stack);
node->hole_follows = 1;
}
}
+struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
+ unsigned long start,
+ unsigned long size,
+ bool atomic)
+{
+ struct drm_mm_node *hole, *node;
+ unsigned long end = start + size;
+ unsigned long hole_start;
+ unsigned long hole_end;
+
+ drm_mm_for_each_hole(hole, mm, hole_start, hole_end) {
+ if (hole_start > start || hole_end < end)
+ continue;
+
+ node = drm_mm_kmalloc(mm, atomic);
+ if (unlikely(node == NULL))
+ return NULL;
+
+ node->start = start;
+ node->size = size;
+ node->mm = mm;
+ node->allocated = 1;
+
+ INIT_LIST_HEAD(&node->hole_stack);
+ list_add(&node->node_list, &hole->node_list);
+
+ if (start == hole_start) {
+ hole->hole_follows = 0;
+ list_del_init(&hole->hole_stack);
+ }
+
+ node->hole_follows = 0;
+ if (end != hole_end) {
+ list_add(&node->hole_stack, &mm->hole_stack);
+ node->hole_follows = 1;
+ }
+
+ return node;
+ }
+
+ WARN(1, "no hole found for block 0x%lx + 0x%lx\n", start, size);
+ return NULL;
+}
+EXPORT_SYMBOL(drm_mm_create_block);
+
struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
unsigned long size,
unsigned alignment,
@@ -253,7 +284,7 @@ static void drm_mm_insert_helper_range(struct drm_mm_node *hole_node,
BUG_ON(node->start + node->size > end);
node->hole_follows = 0;
- if (node->start + node->size < hole_end) {
+ if (__drm_mm_hole_node_start(node) < hole_end) {
list_add(&node->hole_stack, &mm->hole_stack);
node->hole_follows = 1;
}
@@ -327,12 +358,13 @@ void drm_mm_remove_node(struct drm_mm_node *node)
list_entry(node->node_list.prev, struct drm_mm_node, node_list);
if (node->hole_follows) {
- BUG_ON(drm_mm_hole_node_start(node)
- == drm_mm_hole_node_end(node));
+ BUG_ON(__drm_mm_hole_node_start(node) ==
+ __drm_mm_hole_node_end(node));
list_del(&node->hole_stack);
} else
- BUG_ON(drm_mm_hole_node_start(node)
- != drm_mm_hole_node_end(node));
+ BUG_ON(__drm_mm_hole_node_start(node) !=
+ __drm_mm_hole_node_end(node));
+
if (!prev_node->hole_follows) {
prev_node->hole_follows = 1;
@@ -390,6 +422,8 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
{
struct drm_mm_node *entry;
struct drm_mm_node *best;
+ unsigned long adj_start;
+ unsigned long adj_end;
unsigned long best_size;
BUG_ON(mm->scanned_blocks);
@@ -397,17 +431,13 @@ struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
best = NULL;
best_size = ~0UL;
- list_for_each_entry(entry, &mm->hole_stack, hole_stack) {
- unsigned long adj_start = drm_mm_hole_node_start(entry);
- unsigned long adj_end = drm_mm_hole_node_end(entry);
-
+ drm_mm_for_each_hole(entry, mm, adj_start, adj_end) {
if (mm->color_adjust) {
mm->color_adjust(entry, color, &adj_start, &adj_end);
if (adj_end <= adj_start)
continue;
}
- BUG_ON(!entry->hole_follows);
if (!check_free_hole(adj_start, adj_end, size, alignment))
continue;
@@ -434,6 +464,8 @@ struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
{
struct drm_mm_node *entry;
struct drm_mm_node *best;
+ unsigned long adj_start;
+ unsigned long adj_end;
unsigned long best_size;
BUG_ON(mm->scanned_blocks);
@@ -441,13 +473,11 @@ struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
best = NULL;
best_size = ~0UL;
- list_for_each_entry(entry, &mm->hole_stack, hole_stack) {
- unsigned long adj_start = drm_mm_hole_node_start(entry) < start ?
- start : drm_mm_hole_node_start(entry);
- unsigned long adj_end = drm_mm_hole_node_end(entry) > end ?
- end : drm_mm_hole_node_end(entry);
-
- BUG_ON(!entry->hole_follows);
+ drm_mm_for_each_hole(entry, mm, adj_start, adj_end) {
+ if (adj_start < start)
+ adj_start = start;
+ if (adj_end > end)
+ adj_end = end;
if (mm->color_adjust) {
mm->color_adjust(entry, color, &adj_start, &adj_end);