77 #define	SCB_IS_SCSIBUS_B(ahc, scb) \  argument
78 	(SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid) == 'B')
79 #define	SCB_GET_OUR_ID(scb) \  argument
80 	SCSIID_OUR_ID((scb)->hscb->scsiid)
81 #define	SCB_GET_TARGET(ahc, scb) \  argument
82 	SCSIID_TARGET((ahc), (scb)->hscb->scsiid)
83 #define	SCB_GET_CHANNEL(ahc, scb) \  argument
84 	SCSIID_CHANNEL(ahc, (scb)->hscb->scsiid)
85 #define	SCB_GET_LUN(scb) \  argument
86 	((scb)->hscb->lun & LID)
87 #define SCB_GET_TARGET_OFFSET(ahc, scb)	\  argument
88 	(SCB_GET_TARGET(ahc, scb) + (SCB_IS_SCSIBUS_B(ahc, scb) ? 8 : 0))
89 #define SCB_GET_TARGET_MASK(ahc, scb) \  argument
90 	(0x01 << (SCB_GET_TARGET_OFFSET(ahc, scb)))
92 #define SCB_IS_SILENT(scb)					\  argument
94       && (((scb)->flags & SCB_SILENT) != 0))
96 #define SCB_IS_SILENT(scb)					\  argument
97 	(((scb)->flags & SCB_SILENT) != 0)
131  * The maximum amount of SCB storage in hardware on a controller.
145  *	3) Our input queue scheme requires one SCB to always be reserved
158  * The maximum amount of SCB storage we allocate in host memory.  This
159  * number should reflect the 1 additional SCB we require to handle our
297 	 * An SCB upload using the SCB channel's
347 					   * stored in SCB space rather
352 	AHC_PAGESCBS	      = 0x400000,  /* Enable SCB paging */
362 /************************* Hardware  SCB Definition ***************************/
365  * The driver keeps up to MAX_SCB scb structures per card in memory.  The SCB
366  * consists of a "hardware SCB" mirroring the fields available on the card
369  * To minimize space utilization, a portion of the hardware scb stores
382  * an SCB after passing the cdb to the target.  The kernel
393  * Target mode version of the shared data SCB segment.
408 		 * in the SCB.  For longer cdbs, we embed the address
419  * The scb is presented to the sequencer with the dataptr and datacnt
436  * will set the SG_RESID_VALID flag in sgptr and dma the scb back into
447  *	o A residual has occurred if a completed scb has the
466 					 * Index into our kernel SCB array.
475 					 * "Disconnected SCB" lists down
489 /************************ Kernel SCB Definitions ******************************/
491  * Some fields of the SCB are OS dependent.  Here we collect the
493  * in there SCB definition.
520  * The current state of this SCB.
527 					  * this SCB so we gave ourselves
561 struct scb {  struct
564 		SLIST_ENTRY(scb)  sle;  argument
565 		TAILQ_ENTRY(scb)  tqe;
567 	LIST_ENTRY(scb)		  pending_links;  argument
579 	SLIST_HEAD(, scb) free_scbs;	/*  argument
583 	struct	scb *scbindex[256];	/*
584 					 * Mapping from tag to SCB.
593 	struct	scb *scbarray;		/* Array of kernel SCBs */
594 	struct	scsi_sense_data *sense; /* Per SCB sense data */
599 	bus_dma_tag_t	 hscb_dmat;	/* dmat for our hardware SCB array */
866 TAILQ_HEAD(scb_tailq, scb);
908 	struct scb		 *next_queued_scb;
913 	BSD_LIST_HEAD(, scb)	  pending_scbs;
1147 /************************** SCB and SCB queue management **********************/
1150 					 struct scb *scb);
1151 int		ahc_match_scb(struct ahc_softc *ahc, struct scb *scb,