1/* SPDX-License-Identifier: MIT */
 2#ifndef __NVKM_MM_H__
 3#define __NVKM_MM_H__
 4#include <core/os.h>
 5
 6struct 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
20struct nvkm_mm {
21	struct list_head nodes;
22	struct list_head free;
23
24	u32 block_size;
25	int heap_nodes;
26};
27
28static inline bool
29nvkm_mm_initialised(struct nvkm_mm *mm)
30{
31	return mm->heap_nodes;
32}
33
34int  nvkm_mm_init(struct nvkm_mm *, u8 heap, u32 offset, u32 length, u32 block);
35int  nvkm_mm_fini(struct nvkm_mm *);
36int  nvkm_mm_head(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
37		  u32 size_min, u32 align, struct nvkm_mm_node **);
38int  nvkm_mm_tail(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
39		  u32 size_min, u32 align, struct nvkm_mm_node **);
40void nvkm_mm_free(struct nvkm_mm *, struct nvkm_mm_node **);
41void nvkm_mm_dump(struct nvkm_mm *, const char *);
42
43static inline u32
44nvkm_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
55static inline bool
56nvkm_mm_contiguous(struct nvkm_mm_node *node)
57{
58	return !node->next;
59}
60
61static inline u32
62nvkm_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
69static inline u32
70nvkm_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