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

INCLUDED FROM

DEFINITIONS

1. nvkm_mm_initialised
2. nvkm_mm_heap_size
3. nvkm_mm_contiguous
4. nvkm_mm_addr
5. nvkm_mm_size

   1 /* SPDX-License-Identifier: MIT */
   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 *, u8 heap, 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 u32
  44 nvkm_mm_heap_size(struct nvkm_mm *mm, u8 heap)
  45 {
  46         struct nvkm_mm_node *node;
  47         u32 size = 0;
  48         list_for_each_entry(node, &mm->nodes, nl_entry) {
  49                 if (node->heap == heap)
  50                         size += node->length;
  51         }
  52         return size;
  53 }
  54 
  55 static inline bool
  56 nvkm_mm_contiguous(struct nvkm_mm_node *node)
  57 {
  58         return !node->next;
  59 }
  60 
  61 static inline u32
  62 nvkm_mm_addr(struct nvkm_mm_node *node)
  63 {
  64         if (WARN_ON(!nvkm_mm_contiguous(node)))
  65                 return 0;
  66         return node->offset;
  67 }
  68 
  69 static inline u32
  70 nvkm_mm_size(struct nvkm_mm_node *node)
  71 {
  72         u32 size = 0;
  73         do {
  74                 size += node->length;
  75         } while ((node = node->next));
  76         return size;
  77 }
  78 #endif