dasd_3990_erp.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Invalid DCC selection "
                                      "response or timeout");
			break;
		case 0x06:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Missing end operation; device "
                                      "transfer complete");
			break;
		case 0x07:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Missing end operation; device "
                                      "transfer incomplete");
			break;
		case 0x08:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Invalid tag-in for an "
                                      "immediate command sequence");
			break;
		case 0x09:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Invalid tag-in for an "
                                      "extended command sequence");
			break;
		case 0x0A:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - 3990 microcode time out when "
                                      "stopping selection");
			break;
		case 0x0B:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - No response to selection "
                                      "after a poll interruption");
			break;
		case 0x0C:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Permanent path error (DASD "
                                      "controller not available)");
			break;
		case 0x0D:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - DASD controller not available"
                                      " on disconnected command chain");
			break;
		default:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 7 - Reserved");
		}
                break;		

	case 0x80:	/* Format 8 - Additional Device Equipment Checks */
		switch (msg_no) {
		case 0x00:	/* No Message */
		case 0x01:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - Error correction code "
                                      "hardware fault");
			break;
		case 0x03:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - Unexpected end operation "
                                      "response code");
			break;
		case 0x04:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - End operation with transfer "
                                      "count not zero");
			break;
		case 0x05:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - End operation with transfer "
                                      "count zero");
			break;
		case 0x06:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - DPS checks after a system "
                                      "reset or selective reset");
			break;
		case 0x07:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - DPS cannot be filled");
			break;
		case 0x08:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - Short busy time-out during "
                                      "device selection");
			break;
		case 0x09:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - DASD controller failed to "
                                      "set or reset the long busy latch");
			break;
		case 0x0A:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - No interruption from device "
                                      "during a command chain");
			break;
		default:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 8 - Reserved");
		}
                break;		

	case 0x90:	/* Format 9 - Device Read, Write, and Seek Checks */
		switch (msg_no) {
		case 0x00:
			break;	/* No Message */
		case 0x06:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 9 - Device check-2 error");
			break;
		case 0x07:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 9 - Head address did not compare");
			break;
		case 0x0A:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 9 - Track physical address did "
                                      "not compare while oriented");
			break;
		case 0x0E:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 9 - Cylinder address did not "
                                      "compare");
			break;
		default:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT 9 - Reserved");
		}
                break;		

	case 0xF0:		/* Format F - Cache Storage Checks */
		switch (msg_no) {
		case 0x00:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Operation Terminated");
			break;
		case 0x01:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Subsystem Processing Error");
			break;
		case 0x02:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Cache or nonvolatile storage "
                                      "equipment failure");
			break;
		case 0x04:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Caching terminated");
			break;
		case 0x06:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Cache fast write access not "
                                      "authorized");
			break;
		case 0x07:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Track format incorrect");
			break;
		case 0x09:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Caching reinitiated");
			break;
		case 0x0A:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Nonvolatile storage "
                                      "terminated");
			break;
		case 0x0B:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Volume is suspended duplex");
			break;
		case 0x0C:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Subsystem status connot be "
                                      "determined");
			break;
		case 0x0D:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - Caching status reset to "
                                      "default");
			break;
		case 0x0E:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT F - DASD Fast Write inhibited");
			break;
		default:
                        DASD_MESSAGE (KERN_WARNING, device, "%s",
                                      "FORMAT D - Reserved");
		}
                break;		

	default:	/* unknown message format - should not happen */

	} /* end switch message format */

} /* end dasd_3990_handle_env_data */

/*
 * DASD_3990_ERP_COM_REJ
 *
 * DESCRIPTION
 *   Handles 24 byte 'Command Reject' error.
 *
 * PARAMETER
 *   erp                current erp_head
 *   sense              current sense data
 * 
 * RETURN VALUES
 *   erp                'new' erp_head - pointer to new ERP 
 */
ccw_req_t *
dasd_3990_erp_com_rej (ccw_req_t *erp,
		       char      *sense)
{

	dasd_device_t *device = erp->device;

        erp->function = dasd_3990_erp_com_rej;

	/* env data present (ACTION 10 - retry should work) */
	if (sense[2] & SNS2_ENV_DATA_PRESENT) {

                DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "Command Reject - environmental data present");

		dasd_3990_handle_env_data (erp,
                                           sense);

		erp->retries = 5;

	} else {
		/* fatal error -  set status to FAILED */
                DASD_MESSAGE (KERN_ERR, device, "%s",
                              "Command Reject - Fatal error");

                erp = dasd_3990_erp_cleanup (erp,
                                             CQR_STATUS_FAILED);
	}

	return erp;

} /* end dasd_3990_erp_com_rej */

/*
 * DASD_3990_ERP_BUS_OUT 
 *
 * DESCRIPTION
 *   Handles 24 byte 'Bus Out Parity Check' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_bus_out (ccw_req_t *erp)
{

	dasd_device_t *device = erp->device;

        /* first time set initial retry counter and erp_function */
        /* and retry once without blocking queue                 */
        /* (this enables easier enqueing of the cqr)             */
        if (erp->function != dasd_3990_erp_bus_out) {
                erp->retries  = 256;
                erp->function = dasd_3990_erp_bus_out;

        } else {

                /* issue a message and wait for 'device ready' interrupt */
                DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "bus out parity error or BOPC requested by "
                              "channel");
                
                dasd_3990_erp_block_queue (erp,
                                           60);
                
        }

	return erp;

} /* end dasd_3990_erp_bus_out */

/*
 * DASD_3990_ERP_EQUIP_CHECK
 *
 * DESCRIPTION
 *   Handles 24 byte 'Equipment Check' error.
 *
 * PARAMETER
 *   erp                current erp_head
 * RETURN VALUES
 *   erp                new erp_head - pointer to new ERP
 */
ccw_req_t *
dasd_3990_erp_equip_check (ccw_req_t *erp,
			   char      *sense)
{

	dasd_device_t *device = erp->device;

	erp->function = dasd_3990_erp_equip_check;

	if (sense[1] & SNS1_WRITE_INHIBITED) {

		DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "Write inhibited path encountered");

		/* vary path offline */
		DASD_MESSAGE (KERN_ERR, device, "%s",
                              "Path should be varied off-line. "
                              "This is not implemented yet \n - please report "
                              "to [e-mail]");

		erp = dasd_3990_erp_action_1 (erp);

	} else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
                
                DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "Equipment Check - "
                              "environmental data present");
                
                dasd_3990_handle_env_data (erp,
                                           sense);
                
                erp = dasd_3990_erp_action_4 (erp,
                                              sense);
                
        } else if (sense[1] & SNS1_PERM_ERR) {
                DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "Equipment Check - retry exhausted or "
                              "undesirable");
                
                erp = dasd_3990_erp_action_1 (erp);
                
        } else {
                /* all other equipment checks - Action 5 */
                /* rest is done when retries == 0 */
                DASD_MESSAGE (KERN_DEBUG, device, "%s",
                              "Equipment check or processing error");
                
                erp = dasd_3990_erp_action_5 (erp);
        }
        
        return erp;
        
} /* end dasd_3990_erp_equip_check */

/*
 * 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 */
		DASD_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) {

		DASD_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) {

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

		erp = dasd_3990_erp_action_1 (erp);