dasd_3990_erp.c

来自「linux-2.4.29操作系统的源码」· C语言 代码 · 共 1,977 行 · 第 1/5 页

/*
 * DASD_3990_ERP_DATA_CHECK
 *
 * DESCRIPTION
 *   Handles 24 byte 'Data Check' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_data_check (ccw_req_t *erp,
			  char      *sense)
{

	dasd_device_t *device = erp->device;

	erp->function = dasd_3990_erp_data_check;

	if (sense[2] & SNS2_CORRECTABLE) {	/* correctable data check */

		/* issue message that the data has been corrected */
		DEV_MESSAGE (KERN_EMERG, device, "%s",
                             "Data recovered during retry with PCI "
                             "fetch mode active");

                /* not possible to handle this situation in Linux */    
                panic("No way to inform appliction about the possibly "
                      "incorret data");

	} else if (sense[2] & SNS2_ENV_DATA_PRESENT) {

		DEV_MESSAGE (KERN_DEBUG, device, "%s",
                             "Uncorrectable data check recovered secondary "
                             "addr of duplex pair");

		erp = dasd_3990_erp_action_4 (erp,
					      sense);

	} else if (sense[1] & SNS1_PERM_ERR) {

		DEV_MESSAGE (KERN_DEBUG, device, "%s",
                             "Uncorrectable data check with internal "
                             "retry exhausted");

		erp = dasd_3990_erp_action_1 (erp);

	} else {
		/* all other data checks */
		DEV_MESSAGE (KERN_DEBUG, device, "%s",
                             "Uncorrectable data check with retry count "
                             "exhausted...");

		erp = dasd_3990_erp_action_5 (erp);
	}

	return erp;

} /* end dasd_3990_erp_data_check */

/*
 * DASD_3990_ERP_OVERRUN
 *
 * DESCRIPTION
 *   Handles 24 byte 'Overrun' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_overrun (ccw_req_t *erp,
		       char      *sense)
{

	dasd_device_t *device = erp->device;

	erp->function = dasd_3990_erp_overrun;

        DEV_MESSAGE (KERN_DEBUG, device, "%s",
                     "Overrun - service overrun or overrun"
                     " error requested by channel");

        erp = dasd_3990_erp_action_5 (erp);

	return erp;

} /* end dasd_3990_erp_overrun */

/*
 * DASD_3990_ERP_INV_FORMAT
 *
 * DESCRIPTION
 *   Handles 24 byte 'Invalid Track Format' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_inv_format (ccw_req_t *erp,
			  char      *sense)
{

	dasd_device_t *device = erp->device;

	erp->function = dasd_3990_erp_inv_format;

	if (sense[2] & SNS2_ENV_DATA_PRESENT) {

		DEV_MESSAGE (KERN_DEBUG, device, "%s",
                             "Track format error when destaging or "
                             "staging data");

		dasd_3990_handle_env_data (erp,
                                           sense);

		erp = dasd_3990_erp_action_4 (erp,
					      sense);

	} else {
		DEV_MESSAGE (KERN_ERR, device, "%s",
                             "Invalid Track Format - Fatal error should have "
                             "been handled within the interrupt handler");

                erp= dasd_3990_erp_cleanup (erp,
                                            CQR_STATUS_FAILED);
        }

	return erp;

} /* end dasd_3990_erp_inv_format */

/*
 * DASD_3990_ERP_EOC
 *
 * DESCRIPTION
 *   Handles 24 byte 'End-of-Cylinder' error.
 *
 * PARAMETER
 *   erp                already added default erp
 * RETURN VALUES
 *   erp                pointer to original (failed) cqr.
 */
ccw_req_t *
dasd_3990_erp_EOC (ccw_req_t *default_erp,
		   char      *sense)
{

	dasd_device_t *device = default_erp->device;

        DEV_MESSAGE (KERN_ERR, device, "%s",
                     "End-of-Cylinder - must never happen");

        /* implement action 7 - BUG */
        return dasd_3990_erp_cleanup (default_erp,
                                      CQR_STATUS_FAILED);

} /* end dasd_3990_erp_EOC */

/*
 * DASD_3990_ERP_ENV_DATA
 *
 * DESCRIPTION
 *   Handles 24 byte 'Environmental-Data Present' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_env_data (ccw_req_t *erp,
			char      *sense)
{

	dasd_device_t *device = erp->device;

	erp->function = dasd_3990_erp_env_data;

        DEV_MESSAGE (KERN_DEBUG, device, "%s",
                     "Environmental data present");

        dasd_3990_handle_env_data (erp,
                                   sense);

        /* don't retry on disabled interface */
        if (sense[7] != 0x0F) {

                erp = dasd_3990_erp_action_4 (erp,
                                              sense);
        } else {

                erp = dasd_3990_erp_cleanup (erp,
                                             CQR_STATUS_IN_IO);
        }

	return erp;

} /* end dasd_3990_erp_env_data */

/*
 * DASD_3990_ERP_NO_REC
 *
 * DESCRIPTION
 *   Handles 24 byte 'No Record Found' error.
 *
 * PARAMETER
 *   erp                already added default ERP
 *              
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_no_rec (ccw_req_t *default_erp,
		      char      *sense)
{

	dasd_device_t *device = default_erp->device;

        DEV_MESSAGE (KERN_ERR, device, "%s",
                     "No Record Found - Fatal error should "
                     "have been handled within the interrupt handler");

        return dasd_3990_erp_cleanup (default_erp,
                                      CQR_STATUS_FAILED);

} /* end dasd_3990_erp_no_rec */

/*
 * DASD_3990_ERP_FILE_PROT
 *
 * DESCRIPTION
 *   Handles 24 byte 'File Protected' error.
 *   Note: Seek related recovery is not implemented because
 *         wee don't use the seek command yet.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_file_prot (ccw_req_t *erp)
{

	dasd_device_t *device = erp->device;

        DEV_MESSAGE (KERN_ERR, device, "%s",
                     "File Protected");

        return dasd_3990_erp_cleanup (erp,
                                      CQR_STATUS_FAILED);

} /* end dasd_3990_erp_file_prot */

/*
 * DASD_3990_ERP_INSPECT_24 
 *
 * DESCRIPTION
 *   Does a detailed inspection of the 24 byte sense data
 *   and sets up a related error recovery action.  
 *
 * PARAMETER
 *   sense              sense data of the actual error
 *   erp                pointer to the currently created default ERP
 *
 * RETURN VALUES
 *   erp                pointer to the (addtitional) ERP
 */
ccw_req_t *
dasd_3990_erp_inspect_24 (ccw_req_t *erp,
                          char      *sense)
{

	ccw_req_t *erp_filled = NULL;

	/* Check sense for ....    */
	/* 'Command Reject'        */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_CMD_REJECT)) {
		erp_filled = dasd_3990_erp_com_rej (erp,
						    sense);
	}
	/* 'Intervention Required' */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_INTERVENTION_REQ)) {
		erp_filled = dasd_3990_erp_int_req (erp);
	}
	/* 'Bus Out Parity Check'  */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_BUS_OUT_CHECK)) {
		erp_filled = dasd_3990_erp_bus_out (erp);
	}
	/* 'Equipment Check'       */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_EQUIPMENT_CHECK)) {
		erp_filled = dasd_3990_erp_equip_check (erp,
							sense);
	}
	/* 'Data Check'            */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_DATA_CHECK)) {
		erp_filled = dasd_3990_erp_data_check (erp,
						       sense);
	}
	/* 'Overrun'               */
	if ((erp_filled == NULL) &&
	    (sense[0] & SNS0_OVERRUN)) {
		erp_filled = dasd_3990_erp_overrun (erp,
						    sense);
	}
	/* 'Invalid Track Format'  */
	if ((erp_filled == NULL) &&
	    (sense[1] & SNS1_INV_TRACK_FORMAT)) {
		erp_filled = dasd_3990_erp_inv_format (erp,
						       sense);
	}
	/* 'End-of-Cylinder'       */
	if ((erp_filled == NULL) &&
	    (sense[1] & SNS1_EOC)) {
		erp_filled = dasd_3990_erp_EOC (erp,
						sense);
	}
	/* 'Environmental Data'    */
	if ((erp_filled == NULL) &&
	    (sense[2] & SNS2_ENV_DATA_PRESENT)) {
		erp_filled = dasd_3990_erp_env_data (erp,
						     sense);
	}
	/* 'No Record Found'       */
	if ((erp_filled == NULL) &&
	    (sense[1] & SNS1_NO_REC_FOUND)) {
		erp_filled = dasd_3990_erp_no_rec (erp,
						   sense);
	}
	/* 'File Protected'        */
	if ((erp_filled == NULL) &&
	    (sense[1] & SNS1_FILE_PROTECTED)) {
		erp_filled = dasd_3990_erp_file_prot (erp);
	}
	/* other (unknown) error - do default ERP */
	if (erp_filled == NULL) {

		erp_filled = erp;	
	}

	return erp_filled;

} /* END dasd_3990_erp_inspect_24 */

/*
 ***************************************************************************** 
 * 32 byte sense ERP functions (only)
 ***************************************************************************** 
 */

/*
 * DASD_3990_ERPACTION_10_32 
 *
 * DESCRIPTION
 *   Handles 32 byte 'Action 10' of Single Program Action Codes.
 *   Just retry and if retry doesn't work, return with error.
 *
 * PARAMETER
 *   erp                current erp_head
 *   sense              current sense data 
 * RETURN VALUES
 *   erp                modified erp_head
 */
ccw_req_t *
dasd_3990_erp_action_10_32 (ccw_req_t *erp,
                            char      *sense)
{

	dasd_device_t *device = erp->device;

        erp->retries  = 256;
        erp->function = dasd_3990_erp_action_10_32;

	DEV_MESSAGE (KERN_DEBUG, device, "%s",
                     "Perform logging requested");

	return erp;

} /* end dasd_3990_erp_action_10_32 */

/*
 * DASD_3990