write_csr_ring_head
void (*write_csr_ring_head)(void __iomem *csr_base_addr, u32 bank,
ops->write_csr_ring_head(base, bank, tx, state->rings[tx].head);
ops->write_csr_ring_head(base, bank, tx, state->rings[tx].head);
ops->write_csr_ring_head(base, bank, rx, state->rings[rx].head);
csr_ops->write_csr_ring_head = write_csr_ring_head;
csr_ops->write_csr_ring_head = write_csr_ring_head;
csr_ops->write_csr_ring_head(ring->bank->csr_addr,