aic79xx_core.c

linux-2.4.29操作系统的源码

		}

		ahd_handle_message_phase(ahd);
		break;
	}
	case NO_MATCH:
	{
		/* Ensure we don't leave the selection hardware on */
		AHD_ASSERT_MODES(ahd, AHD_MODE_SCSI_MSK, AHD_MODE_SCSI_MSK);
		ahd_outb(ahd, SCSISEQ0, ahd_inb(ahd, SCSISEQ0) & ~ENSELO);

		printf("%s:%c:%d: no active SCB for reconnecting "
		       "target - issuing BUS DEVICE RESET\n",
		       ahd_name(ahd), 'A', ahd_inb(ahd, SELID) >> 4);
		printf("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, "
		       "REG0 == 0x%x ACCUM = 0x%x\n",
		       ahd_inb(ahd, SAVED_SCSIID), ahd_inb(ahd, SAVED_LUN),
		       ahd_inw(ahd, REG0), ahd_inb(ahd, ACCUM));
		printf("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, "
		       "SINDEX == 0x%x\n",
		       ahd_inb(ahd, SEQ_FLAGS), ahd_get_scbptr(ahd),
		       ahd_find_busy_tcl(ahd,
					 BUILD_TCL(ahd_inb(ahd, SAVED_SCSIID),
						   ahd_inb(ahd, SAVED_LUN))),
		       ahd_inw(ahd, SINDEX));
		printf("SELID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, "
		       "SCB_CONTROL == 0x%x\n",
		       ahd_inb(ahd, SELID), ahd_inb_scbram(ahd, SCB_SCSIID),
		       ahd_inb_scbram(ahd, SCB_LUN),
		       ahd_inb_scbram(ahd, SCB_CONTROL));
		printf("SCSIBUS[0] == 0x%x, SCSISIGI == 0x%x\n",
		       ahd_inb(ahd, SCSIBUS), ahd_inb(ahd, SCSISIGI));
		printf("SXFRCTL0 == 0x%x\n", ahd_inb(ahd, SXFRCTL0));
		printf("SEQCTL0 == 0x%x\n", ahd_inb(ahd, SEQCTL0));
		ahd_dump_card_state(ahd);
		ahd->msgout_buf[0] = MSG_BUS_DEV_RESET;
		ahd->msgout_len = 1;
		ahd->msgout_index = 0;
		ahd->msg_type = MSG_TYPE_INITIATOR_MSGOUT;
		ahd_outb(ahd, MSG_OUT, HOST_MSG);
		ahd_assert_atn(ahd);
		break;
	}
	case PROTO_VIOLATION:
	{
		ahd_handle_proto_violation(ahd);
		break;
	}
	case IGN_WIDE_RES:
	{
		struct ahd_devinfo devinfo;

		ahd_fetch_devinfo(ahd, &devinfo);
		ahd_handle_ign_wide_residue(ahd, &devinfo);
		break;
	}
	case BAD_PHASE:
	{
		u_int lastphase;

		lastphase = ahd_inb(ahd, LASTPHASE);
		printf("%s:%c:%d: unknown scsi bus phase %x, "
		       "lastphase = 0x%x.  Attempting to continue\n",
		       ahd_name(ahd), 'A',
		       SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)),
		       lastphase, ahd_inb(ahd, SCSISIGI));
		break;
	}
	case MISSED_BUSFREE:
	{
		u_int lastphase;

		lastphase = ahd_inb(ahd, LASTPHASE);
		printf("%s:%c:%d: Missed busfree. "
		       "Lastphase = 0x%x, Curphase = 0x%x\n",
		       ahd_name(ahd), 'A',
		       SCSIID_TARGET(ahd, ahd_inb(ahd, SAVED_SCSIID)),
		       lastphase, ahd_inb(ahd, SCSISIGI));
		ahd_restart(ahd);
		return;
	}
	case DATA_OVERRUN:
	{
		/*
		 * When the sequencer detects an overrun, it
		 * places the controller in "BITBUCKET" mode
		 * and allows the target to complete its transfer.
		 * Unfortunately, none of the counters get updated
		 * when the controller is in this mode, so we have
		 * no way of knowing how large the overrun was.
		 */
		struct	scb *scb;
		u_int	scbindex;
#ifdef AHD_DEBUG
		u_int	lastphase;
#endif

		scbindex = ahd_get_scbptr(ahd);
		scb = ahd_lookup_scb(ahd, scbindex);
#ifdef AHD_DEBUG
		lastphase = ahd_inb(ahd, LASTPHASE);
		if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) {
			ahd_print_path(ahd, scb);
			printf("data overrun detected %s.  Tag == 0x%x.\n",
			       ahd_lookup_phase_entry(lastphase)->phasemsg,
			       SCB_GET_TAG(scb));
			ahd_print_path(ahd, scb);
			printf("%s seen Data Phase.  Length = %ld.  "
			       "NumSGs = %d.\n",
			       ahd_inb(ahd, SEQ_FLAGS) & DPHASE
			       ? "Have" : "Haven't",
			       ahd_get_transfer_length(scb), scb->sg_count);
			ahd_dump_sglist(scb);
		}
#endif

		/*
		 * Set this and it will take effect when the
		 * target does a command complete.
		 */
		ahd_freeze_devq(ahd, scb);
		ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
		ahd_freeze_scb(scb);
		break;
	}
	case MKMSG_FAILED:
	{
		struct ahd_devinfo devinfo;
		struct scb *scb;
		u_int scbid;

		ahd_fetch_devinfo(ahd, &devinfo);
		printf("%s:%c:%d:%d: Attempt to issue message failed\n",
		       ahd_name(ahd), devinfo.channel, devinfo.target,
		       devinfo.lun);
		scbid = ahd_get_scbptr(ahd);
		scb = ahd_lookup_scb(ahd, scbid);
		if (scb != NULL
		 && (scb->flags & SCB_RECOVERY_SCB) != 0)
			/*
			 * Ensure that we didn't put a second instance of this
			 * SCB into the QINFIFO.
			 */
			ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb),
					   SCB_GET_CHANNEL(ahd, scb),
					   SCB_GET_LUN(scb), SCB_GET_TAG(scb),
					   ROLE_INITIATOR, /*status*/0,
					   SEARCH_REMOVE);
		ahd_outb(ahd, SCB_CONTROL,
			 ahd_inb(ahd, SCB_CONTROL) & ~MK_MESSAGE);
		break;
	}
	case TASKMGMT_FUNC_COMPLETE:
	{
		u_int	scbid;
		struct	scb *scb;

		scbid = ahd_get_scbptr(ahd);
		scb = ahd_lookup_scb(ahd, scbid);
		if (scb != NULL) {
			u_int	   lun;
			u_int	   tag;
			cam_status error;

			ahd_print_path(ahd, scb);
			printf("Task Management Func 0x%x Complete\n",
			       scb->hscb->task_management);
			lun = CAM_LUN_WILDCARD;
			tag = SCB_LIST_NULL;

			switch (scb->hscb->task_management) {
			case SIU_TASKMGMT_ABORT_TASK:
				tag = SCB_GET_TAG(scb);
			case SIU_TASKMGMT_ABORT_TASK_SET:
			case SIU_TASKMGMT_CLEAR_TASK_SET:
				lun = scb->hscb->lun;
				error = CAM_REQ_ABORTED;
				ahd_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
					       'A', lun, tag, ROLE_INITIATOR,
					       error);
				break;
			case SIU_TASKMGMT_LUN_RESET:
				lun = scb->hscb->lun;
			case SIU_TASKMGMT_TARGET_RESET:
			{
				struct ahd_devinfo devinfo;

				ahd_scb_devinfo(ahd, &devinfo, scb);
				error = CAM_BDR_SENT;
				ahd_handle_devreset(ahd, &devinfo, lun,
						    CAM_BDR_SENT,
						    lun != CAM_LUN_WILDCARD
						    ? "Lun Reset"
						    : "Target Reset",
						    /*verbose_level*/0);
				break;
			}
			default:
				panic("Unexpected TaskMgmt Func\n");
				break;
			}
		}
		break;
	}
	case TASKMGMT_CMD_CMPLT_OKAY:
	{
		u_int	scbid;
		struct	scb *scb;

		/*
		 * An ABORT TASK TMF failed to be delivered before
		 * the targeted command completed normally.
		 */
		scbid = ahd_get_scbptr(ahd);
		scb = ahd_lookup_scb(ahd, scbid);
		if (scb != NULL) {
			/*
			 * Remove the second instance of this SCB from
			 * the QINFIFO if it is still there.
                         */
			ahd_print_path(ahd, scb);
			printf("SCB completes before TMF\n");
			/*
			 * Handle losing the race.  Wait until any
			 * current selection completes.  We will then
			 * set the TMF back to zero in this SCB so that
			 * the sequencer doesn't bother to issue another
			 * sequencer interrupt for its completion.
			 */
			while ((ahd_inb(ahd, SCSISEQ0) & ENSELO) != 0
			    && (ahd_inb(ahd, SSTAT0) & SELDO) == 0
			    && (ahd_inb(ahd, SSTAT1) & SELTO) == 0)
				;
			ahd_outb(ahd, SCB_TASK_MANAGEMENT, 0);
			ahd_search_qinfifo(ahd, SCB_GET_TARGET(ahd, scb),
					   SCB_GET_CHANNEL(ahd, scb),  
					   SCB_GET_LUN(scb), SCB_GET_TAG(scb), 
					   ROLE_INITIATOR, /*status*/0,   
					   SEARCH_REMOVE);
		}
		break;
	}
	case TRACEPOINT0:
	case TRACEPOINT1:
	case TRACEPOINT2:
	case TRACEPOINT3:
		printf("%s: Tracepoint %d\n", ahd_name(ahd),
		       seqintcode - TRACEPOINT0);
		break;
	case NO_SEQINT:
		break;
	case SAW_HWERR:
		ahd_handle_hwerrint(ahd);
		break;
	default:
		printf("%s: Unexpected SEQINTCODE %d\n", ahd_name(ahd),
		       seqintcode);
		break;
	}
	/*
	 *  The sequencer is paused immediately on
	 *  a SEQINT, so we should restart it when
	 *  we're done.
	 */
	ahd_unpause(ahd);
}

void
ahd_handle_scsiint(struct ahd_softc *ahd, u_int intstat)
{
	struct scb	*scb;
	u_int		 status0;
	u_int		 status3;
	u_int		 status;
	u_int		 lqistat1;
	u_int		 lqostat0;
	u_int		 scbid;
	u_int		 busfreetime;

	ahd_update_modes(ahd);
	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);

	status3 = ahd_inb(ahd, SSTAT3) & (NTRAMPERR|OSRAMPERR);
	status0 = ahd_inb(ahd, SSTAT0) & (IOERR|OVERRUN|SELDI|SELDO);
	status = ahd_inb(ahd, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR);
	lqistat1 = ahd_inb(ahd, LQISTAT1);
	lqostat0 = ahd_inb(ahd, LQOSTAT0);
	busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME;
	if ((status0 & (SELDI|SELDO)) != 0) {
		u_int simode0;

		ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
		simode0 = ahd_inb(ahd, SIMODE0);
		status0 &= simode0 & (IOERR|OVERRUN|SELDI|SELDO);
		ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
	}
	scbid = ahd_get_scbptr(ahd);
	scb = ahd_lookup_scb(ahd, scbid);
	if (scb != NULL
	 && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) != 0)
		scb = NULL;

	/* Make sure the sequencer is in a safe location. */
	ahd_clear_critical_section(ahd);

	if ((status0 & IOERR) != 0) {
		u_int now_lvd;

		now_lvd = ahd_inb(ahd, SBLKCTL) & ENAB40;
		printf("%s: Transceiver State Has Changed to %s mode\n",
		       ahd_name(ahd), now_lvd ? "LVD" : "SE");
		ahd_outb(ahd, CLRSINT0, CLRIOERR);
		/*
		 * A change in I/O mode is equivalent to a bus reset.
		 */
		ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
		ahd_pause(ahd);
		ahd_setup_iocell_workaround(ahd);
		ahd_unpause(ahd);
	} else if ((status0 & OVERRUN) != 0) {
		printf("%s: SCSI offset overrun detected.  Resetting bus.\n",
		       ahd_name(ahd));
		ahd_reset_channel(ahd, 'A', /*Initiate Reset*/TRUE);
	} else if ((status & SCSIRSTI) != 0) {
		printf("%s: Someone reset channel A\n", ahd_name(ahd));
		ahd_reset_channel(ahd, 'A', /*Initiate Reset*/FALSE);
	} else if ((status & SCSIPERR) != 0) {
		ahd_handle_transmission_error(ahd);
	} else if (lqostat0 != 0) {
		printf("%s: lqostat0 == 0x%x!\n", ahd_name(ahd), lqostat0);
		ahd_outb(ahd, CLRLQOINT0, lqostat0);
		if ((ahd->bugs & AHD_CLRLQO_AUTOCLR_BUG) != 0) {
			ahd_outb(ahd, CLRLQOINT1, 0);
		}
	} else if ((status & SELTO) != 0) {
		u_int  scbid;

		/* Stop the selection */
		ahd_outb(ahd, SCSISEQ0, 0);

		/* No more pending messages */
		ahd_clear_msg_state(ahd);

		/* Clear interrupt state */
		ahd_outb(ahd, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR);

		/*
		 * Although the driver does not care about the
		 * 'Selection in Progress' status bit, the busy
		 * LED does.  SELINGO is only cleared by a sucessfull
		 * selection, so we must manually clear it to insure
		 * the LED turns off just incase no future successful
		 * selections occur (e.g. no devices on the bus).
		 */
		ahd_outb(ahd, CLRSINT0, CLRSELINGO);

		scbid = ahd_inw(ahd, WAITING_TID_HEAD);
		scb = ahd_lookup_scb(ahd, scbid);
		if (scb == NULL) {
			printf("%s: ahd_intr - referenced scb not "
			       "valid during SELTO scb(0x%x)\n",
			       ahd_name(ahd), scbid);
			ahd_dump_card_state(ahd);
		} else {
			struct ahd_devinfo devinfo;
#ifdef AHD_DEBUG
			if ((ahd_debug & AHD_SHOW_SELTO) != 0) {
				ahd_print_path(ahd, scb);
				printf("Saw Selection Timeout for SCB 0x%x\n",
				       scbid);
			}
#endif
			/*
			 * Force a renegotiation with this target just in
			 * case the cable was pulled and will later be
			 * re-attached.  The target may forget its negotiation
			 * settings with us should it attempt to reselect
			 * during the interruption.  The target will not issue
			 * a unit attention in this case, so we must always
			 * renegotiate.
			 */
			ahd_scb_devinfo(ahd, &devinfo, scb);
			ahd_force_renegotiation(ahd, &devinfo);
			ahd_set_transaction_status(scb, CAM_SEL_TIMEOUT);
			ahd_freeze_devq(ahd, scb);
		}
		ahd_outb(ahd, CLRINT, CLRSCSIINT);
		ahd_iocell_first_selection(ahd);
		ahd_unpause(ahd);
	} else if ((status0 & (SELDI|SELDO)) != 0) {
		ahd_iocell_first_selection(ahd);
		ahd_unpause(ahd);
	} else if (status3 != 0) {
		printf("%s: SCSI Cell parity error SSTAT3 == 0x%x\n",
		       ahd_name(ahd), status3);
		ahd_outb(ahd, CLRSINT3, status3);
	} else if ((lqistat1 & (LQIPHASE_LQ|LQIPHASE_NLQ)) != 0) {
		ahd_handle_lqiphase_error(ahd, lqistat1);
	} else if ((lqistat1 & LQICRCI_NLQ) != 0) {
		/*
		 * This status can be delayed during some
		 * streaming operations.  The SCSIPHASE
		 * handler has already dealt with this case
		 * so just clear the error.
		 */
		ahd_outb(ahd, CLRLQIINT1, CLRLQICRCI_NLQ);
	} else if ((status & BUSFREE) != 0) {
		u_int lqostat1;
		int   restart;
		int   clear_fifo;
		int   packetized;
		u_int mode;

		/*
		 * Clear our selection hardware as soon as possible.
		 * We may have an entry in the waiting Q for this target,
		 * that is affected by this busfree and we don't want to
		 * go about selecting the target while we handle the event.
		 */
		ahd_outb(ahd, SCSISEQ0, 0);

		/*
		 * Determine what we were up to at the time of
		 * the busfree.
		 */
		mode = AHD_MODE_SCSI;
		busfreetime = ahd_inb(ahd, SSTAT2) & BUSFREETIME;
		lqostat1 = ahd_inb(ahd, LQOSTAT1);
		switch (busfreetime) {
		case BUSFREE_DFF0:
		case BUSFREE_DFF1:
		{
			u_int	scbid;
			struct	scb *scb;

			mode = busfreetime == BUSFREE_DFF0
			     ? AHD_MODE_DFF0 : AHD_MODE_DFF1;
			ahd_set_modes(ahd, mode, mode);
			scbid = ahd_get_scbptr(ahd);
			scb = ahd_lookup_scb(ahd, scbid);
			if (scb == NULL) {