BEST_dma_device.h

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#ifndef BEST_DMA_DEVICE_H_
#define BEST_DMA_DEVICE_H_


#define DMA_MAX_BUFFER_NR       32


struct dma_dev_struct {
    char name[16];

    void* desc_addr;

    void* csr_addr;

    void* buf[DMA_MAX_BUFFER_NR];

    uint8_t buf_number;

    uint32_t buf_len;

    dma_addr_t dma_handle[DMA_MAX_BUFFER_NR];

    uint8_t curent_buff_idx;

    dev_t cdevno;

    struct cdev cdev;
};

int dma_dev_create(struct dma_dev_struct* dev, struct class* best_class);

void dma_dev_remove(struct dma_dev_struct* dev, struct class* best_class);

void dma_reset(struct dma_dev_struct* dev);

void dma_advance_buf(struct dma_dev_struct* dev);

int dma_dev_allocate_buffers(struct pci_dev *dev, struct dma_dev_struct* dma);

void dma_dev_free_buffers(struct pci_dev *dev, struct dma_dev_struct* dma);

#endif /* BEST_DMA_DEVICE_H_ */