drivers/gpu/drm/nouveau/include/nvkm/core/mm.h

   1 #ifndef __NVKM_MM_H__
   2 #define __NVKM_MM_H__
   3 #include <core/os.h>
   4
   5 struct nvkm_mm_node {
   6         struct list_head nl_entry;
   7         struct list_head fl_entry;
   8         struct nvkm_mm_node *next;
   9
  10 #define NVKM_MM_HEAP_ANY 0x00
  11         u8  heap;
  12 #define NVKM_MM_TYPE_NONE 0x00
  13 #define NVKM_MM_TYPE_HOLE 0xff
  14         u8  type;
  15         u32 offset;
  16         u32 length;
  17 };
  18
  19 struct nvkm_mm {
  20         struct list_head nodes;
  21         struct list_head free;
  22
  23         u32 block_size;
  24         int heap_nodes;
  25 };
  26
  27 static inline bool
  28 nvkm_mm_initialised(struct nvkm_mm *mm)
  29 {
  30         return mm->heap_nodes;
  31 }
  32
  33 int  nvkm_mm_init(struct nvkm_mm *, u32 offset, u32 length, u32 block);
  34 int  nvkm_mm_fini(struct nvkm_mm *);
  35 int  nvkm_mm_head(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
  36                   u32 size_min, u32 align, struct nvkm_mm_node **);
  37 int  nvkm_mm_tail(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
  38                   u32 size_min, u32 align, struct nvkm_mm_node **);
  39 void nvkm_mm_free(struct nvkm_mm *, struct nvkm_mm_node **);
  40 void nvkm_mm_dump(struct nvkm_mm *, const char *);
  41
  42 static inline bool
  43 nvkm_mm_contiguous(struct nvkm_mm_node *node)
  44 {
  45         return !node->next;
  46 }
  47 #endif