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bhavar.h revision 1.1 
      1 /*
      2  * Mail box defs  etc.
      3  * these could be bigger but we need the bha_softc to fit on a single page..
      4  */
      5 #define BHA_MBX_SIZE	32	/* mail box size  (MAX 255 MBxs) */
      6 				/* don't need that many really */
      7 #define BHA_CCB_MAX	32	/* store up to 32 CCBs at one time */
      8 #define	CCB_HASH_SIZE	32	/* hash table size for phystokv */
      9 #define	CCB_HASH_SHIFT	9
     10 #define CCB_HASH(x)	((((long)(x))>>CCB_HASH_SHIFT) & (CCB_HASH_SIZE - 1))
     11 
     12 #define bha_nextmbx(wmb, mbx, mbio) \
     13 	if ((wmb) == &(mbx)->mbio[BHA_MBX_SIZE - 1])	\
     14 		(wmb) = &(mbx)->mbio[0];		\
     15 	else						\
     16 		(wmb)++;
     17 
     18 struct bha_mbx {
     19 	struct bha_mbx_out mbo[BHA_MBX_SIZE];
     20 	struct bha_mbx_in mbi[BHA_MBX_SIZE];
     21 	struct bha_mbx_out *cmbo;	/* Collection Mail Box out */
     22 	struct bha_mbx_out *tmbo;	/* Target Mail Box out */
     23 	struct bha_mbx_in *tmbi;	/* Target Mail Box in */
     24 };
     25 
     26 struct bha_softc {
     27 	struct device sc_dev;
     28 	bus_chipset_tag_t sc_bc;
     29 
     30 	bus_io_handle_t sc_ioh;
     31 	int sc_irq, sc_drq;
     32 	void *sc_ih;
     33 
     34 	char sc_model[7],
     35 	     sc_firmware[6];
     36 
     37 	struct bha_mbx sc_mbx;		/* all our mailboxes */
     38 #define	wmbx	(&sc->sc_mbx)
     39 	struct bha_ccb *sc_ccbhash[CCB_HASH_SIZE];
     40 	TAILQ_HEAD(, bha_ccb) sc_free_ccb, sc_waiting_ccb;
     41 	int sc_numccbs, sc_mbofull;
     42 	int sc_scsi_dev;		/* adapters scsi id */
     43 	struct scsi_link sc_link;	/* prototype for devs */
     44 };
     45 
     46 int	bha_find __P((bus_chipset_tag_t, bus_io_handle_t, struct bha_softc *));
     47 void	bha_attach __P((struct bha_softc *));
     48 int	bha_intr __P((void *));
     49