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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __NVKM_MM_H__
   3 #define __NVKM_MM_H__
   4 #include <core/os.h>
   5
   6 struct nvkm_mm_node {
   7         struct list_head nl_entry;
   8         struct list_head fl_entry;
   9         struct nvkm_mm_node *next;
  10
  11 #define NVKM_MM_HEAP_ANY 0x00
  12         u8  heap;
  13 #define NVKM_MM_TYPE_NONE 0x00
  14 #define NVKM_MM_TYPE_HOLE 0xff
  15         u8  type;
  16         u32 offset;
  17         u32 length;
  18 };
  19
  20 struct nvkm_mm {
  21         struct list_head nodes;
  22         struct list_head free;
  23
  24         u32 block_size;
  25         int heap_nodes;
  26 };
  27
  28 static inline bool
  29 nvkm_mm_initialised(struct nvkm_mm *mm)
  30 {
  31         return mm->heap_nodes;
  32 }
  33
  34 int  nvkm_mm_init(struct nvkm_mm *, u32 offset, u32 length, u32 block);
  35 int  nvkm_mm_fini(struct nvkm_mm *);
  36 int  nvkm_mm_head(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
  37                   u32 size_min, u32 align, struct nvkm_mm_node **);
  38 int  nvkm_mm_tail(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
  39                   u32 size_min, u32 align, struct nvkm_mm_node **);
  40 void nvkm_mm_free(struct nvkm_mm *, struct nvkm_mm_node **);
  41 void nvkm_mm_dump(struct nvkm_mm *, const char *);
  42
  43 static inline bool
  44 nvkm_mm_contiguous(struct nvkm_mm_node *node)
  45 {
  46         return !node->next;
  47 }
  48 #endif