MANTIS_BUF_SIZE
#define MANTIS_BLOCK_BYTES (MANTIS_BUF_SIZE / 4)
#define MANTIS_BLOCK_COUNT (MANTIS_BUF_SIZE / MANTIS_BLOCK_BYTES)
MANTIS_BUF_SIZE);
dma_free_coherent(&mantis->pdev->dev, MANTIS_BUF_SIZE,
MANTIS_BUF_SIZE,
mantis->buf_cpu, MANTIS_BUF_SIZE);