efx_reg
_efx_writed(efx, cpu_to_le32(1), efx_reg(efx, ER_GZ_MC_DB_HWRD));
efx_reg(channel->efx, ER_GZ_EVQ_INT_PRIME));
efx_readd(efx, ®, efx_reg(efx, ER_GZ_MC_SFT_STATUS));
_efx_writed(efx, cpu_to_le32((u64)dma_addr >> 32), efx_reg(efx, ER_GZ_MC_DB_LWRD));
_efx_writed(efx, cpu_to_le32((u32)dma_addr), efx_reg(efx, ER_GZ_MC_DB_HWRD));