BAM_DMUX_BUFFER_SIZE
#define BAM_DMUX_MAX_DATA_SIZE (BAM_DMUX_BUFFER_SIZE - BAM_DMUX_HDR_SIZE)
skb_dma->skb = __netdev_alloc_skb(NULL, BAM_DMUX_BUFFER_SIZE, gfp);
skb_put(skb_dma->skb, BAM_DMUX_BUFFER_SIZE);
.src_maxburst = BAM_DMUX_BUFFER_SIZE,