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      1 /*	$NetBSD: mm.h,v 1.3 2021/12/18 23:45:33 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: MIT */
      4 #ifndef __NVKM_MM_H__
      5 #define __NVKM_MM_H__
      6 #include <core/os.h>
      7 
      8 struct nvkm_mm_node {
      9 	struct list_head nl_entry;
     10 	struct list_head fl_entry;
     11 	struct nvkm_mm_node *next;
     12 
     13 #define NVKM_MM_HEAP_ANY 0x00
     14 	u8  heap;
     15 #define NVKM_MM_TYPE_NONE 0x00
     16 #define NVKM_MM_TYPE_HOLE 0xff
     17 	u8  type;
     18 	u32 offset;
     19 	u32 length;
     20 };
     21 
     22 struct nvkm_mm {
     23 	struct list_head nodes;
     24 	struct list_head free;
     25 
     26 	u32 block_size;
     27 	int heap_nodes;
     28 };
     29 
     30 static inline bool
     31 nvkm_mm_initialised(struct nvkm_mm *mm)
     32 {
     33 	return mm->heap_nodes;
     34 }
     35 
     36 int  nvkm_mm_init(struct nvkm_mm *, u8 heap, u32 offset, u32 length, u32 block);
     37 int  nvkm_mm_fini(struct nvkm_mm *);
     38 int  nvkm_mm_head(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
     39 		  u32 size_min, u32 align, struct nvkm_mm_node **);
     40 int  nvkm_mm_tail(struct nvkm_mm *, u8 heap, u8 type, u32 size_max,
     41 		  u32 size_min, u32 align, struct nvkm_mm_node **);
     42 void nvkm_mm_free(struct nvkm_mm *, struct nvkm_mm_node **);
     43 void nvkm_mm_dump(struct nvkm_mm *, const char *);
     44 
     45 static inline u32
     46 nvkm_mm_heap_size(struct nvkm_mm *mm, u8 heap)
     47 {
     48 	struct nvkm_mm_node *node;
     49 	u32 size = 0;
     50 	list_for_each_entry(node, &mm->nodes, nl_entry) {
     51 		if (node->heap == heap)
     52 			size += node->length;
     53 	}
     54 	return size;
     55 }
     56 
     57 static inline bool
     58 nvkm_mm_contiguous(struct nvkm_mm_node *node)
     59 {
     60 	return !node->next;
     61 }
     62 
     63 static inline u32
     64 nvkm_mm_addr(struct nvkm_mm_node *node)
     65 {
     66 	if (WARN_ON(!nvkm_mm_contiguous(node)))
     67 		return 0;
     68 	return node->offset;
     69 }
     70 
     71 static inline u32
     72 nvkm_mm_size(struct nvkm_mm_node *node)
     73 {
     74 	u32 size = 0;
     75 	do {
     76 		size += node->length;
     77 	} while ((node = node->next));
     78 	return size;
     79 }
     80 #endif
     81