dma.h

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#ifndef __DMA_H__
#define __DMA_H__
 
#include <Mm/pmmngr.h>
#include <Mm/vmmngr.h>
#include <aurora.h>
 
typedef struct _au_dma_page_ {
    void* virt;
    uint64_t phys;
    uint32_t in_use;
    uint32_t slots;
    uint8_t* bitmap;
    struct _au_dma_page_* next;
}AuDMAPage;
 
typedef struct _au_dma_pool_ {
    char name[32];
    size_t alloc_sz;
    size_t align;
    size_t boundary;
    uint32_t slots_per_page;
    AuDMAPage* pages;
    uint64_t total_allocs;
    uint64_t total_frees;
}AuDMAPool;
 
#define DMA_NUM_CLASSES 7
#define DMA_MAX_POOL_SIZE 512
 
typedef struct _au_dma_global_class_{
    AuDMAPool* pools[DMA_NUM_CLASSES];
    size_t szClass[DMA_NUM_CLASSES];
}AuDMAGlobalClass;
 
 
AU_EXTERN AU_EXPORT AuDMAPool* AuDMAPoolCreate(const char* name, size_t alloc_sz, size_t align, size_t boundary);
 
AU_EXTERN AU_EXPORT void* AuDMAPoolAlloc(AuDMAPool* pool, uint64_t* phys_out);
 
AU_EXTERN AU_EXPORT void AuDMAPoolFree(AuDMAPool* pool, void* virt, uint64_t phys);
 
AU_EXTERN AU_EXPORT void AuDMAPoolDestroy(AuDMAPool* pool);
 
AU_EXTERN AU_EXPORT void AuDMAGlobalClassInitialize(AuDMAGlobalClass* gclass, char* name);
 
AU_EXTERN AU_EXPORT void* AuDMAGClassAlloc(AuDMAGlobalClass* gClass, size_t sz, uint64_t* physOut);
 
AU_EXTERN AU_EXPORT void AuDMAGClassFree(AuDMAGlobalClass* gClass, void* virt, uint64_t physOut, size_t sz);
 
AU_EXTERN AU_EXPORT void AuDMAGClassDestroy(AuDMAGlobalClass* gClass);
 
 
#endif