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DMA Controller (dma)

DMA controller.

Device Type​

DEVICE_TYPE_DMACHIP

Struct​

struct dmachip_t {
    char * name;
    int base, ndma, channel;
    void (*start)(struct dmachip_t * dmachip, int c, void * s, void * d, int64_t n, uint64_t f);
    void (*stop)(struct dmachip_t * dmachip, int c);
    int (*busying)(struct dmachip_t * dmachip, int c);
    void * priv;
};

Key API​

FunctionDescription
search_dmachip(name)Find DMA controller by name
register_dmachip(dmachip, drv)Register DMA controller
unregister_dmachip(dmachip)Unregister DMA controller
dma_start(channel, src, dst, count, flags)Start DMA transfer
dma_stop(channel)Stop DMA transfer
dma_wait(channel)Wait for transfer completion

Description​

DMA controller interface. Supports multiple transfer directions and configurable data width, burst size.