#define MM_UNUSED_TARGET 4
-static struct drm_mm_node *drm_mm_kmalloc(struct drm_mm *mm, int atomic)
-{
- struct drm_mm_node *child;
-
- if (atomic)
- child = kzalloc(sizeof(*child), GFP_ATOMIC);
- else
- child = kzalloc(sizeof(*child), GFP_KERNEL);
-
- if (unlikely(child == NULL)) {
- spin_lock(&mm->unused_lock);
- if (list_empty(&mm->unused_nodes))
- child = NULL;
- else {
- child =
- list_entry(mm->unused_nodes.next,
- struct drm_mm_node, node_list);
- list_del(&child->node_list);
- --mm->num_unused;
- }
- spin_unlock(&mm->unused_lock);
- }
- return child;
-}
-
-/* drm_mm_pre_get() - pre allocate drm_mm_node structure
- * drm_mm: memory manager struct we are pre-allocating for
- *
- * Returns 0 on success or -ENOMEM if allocation fails.
- */
-int drm_mm_pre_get(struct drm_mm *mm)
-{
- struct drm_mm_node *node;
-
- spin_lock(&mm->unused_lock);
- while (mm->num_unused < MM_UNUSED_TARGET) {
- spin_unlock(&mm->unused_lock);
- node = kzalloc(sizeof(*node), GFP_KERNEL);
- spin_lock(&mm->unused_lock);
-
- if (unlikely(node == NULL)) {
- int ret = (mm->num_unused < 2) ? -ENOMEM : 0;
- spin_unlock(&mm->unused_lock);
- return ret;
- }
- ++mm->num_unused;
- list_add_tail(&node->node_list, &mm->unused_nodes);
- }
- spin_unlock(&mm->unused_lock);
- return 0;
-}
-EXPORT_SYMBOL(drm_mm_pre_get);
+static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long color,
+ enum drm_mm_search_flags flags);
+static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long color,
+ unsigned long start,
+ unsigned long end,
+ enum drm_mm_search_flags flags);
static void drm_mm_insert_helper(struct drm_mm_node *hole_node,
struct drm_mm_node *node,
}
EXPORT_SYMBOL(drm_mm_reserve_node);
-struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *hole_node,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- int atomic)
-{
- struct drm_mm_node *node;
-
- node = drm_mm_kmalloc(hole_node->mm, atomic);
- if (unlikely(node == NULL))
- return NULL;
-
- drm_mm_insert_helper(hole_node, node, size, alignment, color);
-
- return node;
-}
-EXPORT_SYMBOL(drm_mm_get_block_generic);
-
/**
* Search for free space and insert a preallocated memory node. Returns
* -ENOSPC if no suitable free area is available. The preallocated memory node
}
}
-struct drm_mm_node *drm_mm_get_block_range_generic(struct drm_mm_node *hole_node,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- unsigned long start,
- unsigned long end,
- int atomic)
-{
- struct drm_mm_node *node;
-
- node = drm_mm_kmalloc(hole_node->mm, atomic);
- if (unlikely(node == NULL))
- return NULL;
-
- drm_mm_insert_helper_range(hole_node, node, size, alignment, color,
- start, end);
-
- return node;
-}
-EXPORT_SYMBOL(drm_mm_get_block_range_generic);
-
/**
* Search for free space and insert a preallocated memory node. Returns
* -ENOSPC if no suitable free area is available. This is for range
}
EXPORT_SYMBOL(drm_mm_remove_node);
-/*
- * Remove a memory node from the allocator and free the allocated struct
- * drm_mm_node. Only to be used on a struct drm_mm_node obtained by one of the
- * drm_mm_get_block functions.
- */
-void drm_mm_put_block(struct drm_mm_node *node)
-{
-
- struct drm_mm *mm = node->mm;
-
- drm_mm_remove_node(node);
-
- spin_lock(&mm->unused_lock);
- if (mm->num_unused < MM_UNUSED_TARGET) {
- list_add(&node->node_list, &mm->unused_nodes);
- ++mm->num_unused;
- } else
- kfree(node);
- spin_unlock(&mm->unused_lock);
-}
-EXPORT_SYMBOL(drm_mm_put_block);
-
static int check_free_hole(unsigned long start, unsigned long end,
unsigned long size, unsigned alignment)
{
return end >= start + size;
}
-struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- enum drm_mm_search_flags flags)
+static struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
+ unsigned long size,
+ unsigned alignment,
+ unsigned long color,
+ enum drm_mm_search_flags flags)
{
struct drm_mm_node *entry;
struct drm_mm_node *best;
return best;
}
-EXPORT_SYMBOL(drm_mm_search_free_generic);
-struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
+static struct drm_mm_node *drm_mm_search_free_in_range_generic(const struct drm_mm *mm,
unsigned long size,
unsigned alignment,
unsigned long color,
return best;
}
-EXPORT_SYMBOL(drm_mm_search_free_in_range_generic);
/**
* Moves an allocation. To be used with embedded struct drm_mm_node.
void drm_mm_init(struct drm_mm * mm, unsigned long start, unsigned long size)
{
INIT_LIST_HEAD(&mm->hole_stack);
- INIT_LIST_HEAD(&mm->unused_nodes);
- mm->num_unused = 0;
mm->scanned_blocks = 0;
- spin_lock_init(&mm->unused_lock);
/* Clever trick to avoid a special case in the free hole tracking. */
INIT_LIST_HEAD(&mm->head_node.node_list);
void drm_mm_takedown(struct drm_mm * mm)
{
- struct drm_mm_node *entry, *next;
-
- if (WARN(!list_empty(&mm->head_node.node_list),
- "Memory manager not clean. Delaying takedown\n")) {
- return;
- }
-
- spin_lock(&mm->unused_lock);
- list_for_each_entry_safe(entry, next, &mm->unused_nodes, node_list) {
- list_del(&entry->node_list);
- kfree(entry);
- --mm->num_unused;
- }
- spin_unlock(&mm->unused_lock);
-
- BUG_ON(mm->num_unused != 0);
+ WARN(!list_empty(&mm->head_node.node_list),
+ "Memory manager not clean during takedown.\n");
}
EXPORT_SYMBOL(drm_mm_takedown);
/* head_node.node_list is the list of all memory nodes, ordered
* according to the (increasing) start address of the memory node. */
struct drm_mm_node head_node;
- struct list_head unused_nodes;
- int num_unused;
- spinlock_t unused_lock;
unsigned int scan_check_range : 1;
unsigned scan_alignment;
unsigned long scan_color;
#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
&(mm)->head_node.node_list, \
node_list)
-#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
- for (entry = (mm)->prev_scanned_node, \
- next = entry ? list_entry(entry->node_list.next, \
- struct drm_mm_node, node_list) : NULL; \
- entry != NULL; entry = next, \
- next = entry ? list_entry(entry->node_list.next, \
- struct drm_mm_node, node_list) : NULL) \
/* Note that we need to unroll list_for_each_entry in order to inline
* setting hole_start and hole_end on each iteration and keep the
* Basic range manager support (drm_mm.c)
*/
extern int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node);
-extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- int atomic);
-extern struct drm_mm_node *drm_mm_get_block_range_generic(
- struct drm_mm_node *node,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- unsigned long start,
- unsigned long end,
- int atomic);
-
-static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
- unsigned long size,
- unsigned alignment)
-{
- return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
-}
-static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
- unsigned long size,
- unsigned alignment)
-{
- return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
-}
-static inline struct drm_mm_node *drm_mm_get_block_range(
- struct drm_mm_node *parent,
- unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end)
-{
- return drm_mm_get_block_range_generic(parent, size, alignment, 0,
- start, end, 0);
-}
-static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
- struct drm_mm_node *parent,
- unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end)
-{
- return drm_mm_get_block_range_generic(parent, size, alignment, 0,
- start, end, 1);
-}
extern int drm_mm_insert_node_generic(struct drm_mm *mm,
struct drm_mm_node *node,
0, start, end, flags);
}
-extern void drm_mm_put_block(struct drm_mm_node *cur);
extern void drm_mm_remove_node(struct drm_mm_node *node);
extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
-extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- enum drm_mm_search_flags flags);
-extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
- const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- unsigned long color,
- unsigned long start,
- unsigned long end,
- enum drm_mm_search_flags flags);
-static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- enum drm_mm_search_flags flags)
-{
- return drm_mm_search_free_generic(mm,size, alignment, 0, flags);
-}
-static inline struct drm_mm_node *drm_mm_search_free_in_range(
- const struct drm_mm *mm,
- unsigned long size,
- unsigned alignment,
- unsigned long start,
- unsigned long end,
- enum drm_mm_search_flags flags)
-{
- return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
- start, end, flags);
-}
-
extern void drm_mm_init(struct drm_mm *mm,
unsigned long start,
unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);
extern int drm_mm_clean(struct drm_mm *mm);
-extern int drm_mm_pre_get(struct drm_mm *mm);
-
-static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
-{
- return block->mm;
-}
void drm_mm_init_scan(struct drm_mm *mm,
unsigned long size,
projects / users / dwmw2 / linux.git / commitdiff