iopdma_segment
struct iopdma_segment *iopdma_seg;
struct iopdma_segment ds_iopdma_seg;
iopdma_allocate_buffer(struct iopdma_segment *seg, size_t size)
iopdma_free_buffer(struct iopdma_segment *seg)
int iopdma_allocate_buffer(struct iopdma_segment *, size_t size);
void iopdma_free_buffer(struct iopdma_segment *);