153 struct	esc_softc {  struct
177 	int		       (*sc_setup_dma)(struct esc_softc *, void *,  argument
179 	int		       (*sc_build_dma_chain)(struct esc_softc *,  argument
181 	int		       (*sc_need_bump)(struct esc_softc *, void *,  argument
186 	void		       (*sc_led)(struct esc_softc *, int);  argument
189 	struct nexus		 sc_nexus[8];
190 	struct nexus		*sc_cur_nexus;
191 	struct nexus		*sc_sel_nexus;
194 	u_char			*sc_buf;	/* va */
195 	int			 sc_len;
197 	void			*sc_dma_buf;	/* pa */
198 	int			 sc_dma_len;
199 	void			*sc_dma_blk_ptr;
200 	int			 sc_dma_blk_len;
201 	short			 sc_dma_blk_flg;
203 	struct esc_dma_chain	*sc_chain;	/* Current DMA chain */
204 	short			 sc_max_link;
205 	short			 sc_cur_link;
208 	u_char			 sc_status;
209 	u_char			 sc_interrupt;
210 	u_char			 sc_resel[2];
212 	u_char			 sc_units_disconnected;
215 	u_char			 sc_config1;
216 	u_char			 sc_config2;
217 	u_char			 sc_config3;
218 	u_char			 sc_config4;
219 	u_char			 sc_clock_conv_fact;
220 	u_char			 sc_timeout_val;
221 	u_char			 sc_clock_period;
223 	u_char			 sc_msg_in[7];
224 	u_char			 sc_msg_in_len;
226 	u_char			 sc_msg_out[7];
227 	u_char			 sc_msg_out_len;
229 	u_char			 sc_unit;
230 	u_char			 sc_lun;
231 	u_char			 sc_flags;