forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2743 lines
67 KiB
C
2743 lines
67 KiB
C
/*
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||
* File...........: linux/drivers/s390/block/dasd_3990_erp.c
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* Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
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* Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000, 2001
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*
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* $Revision: 1.36 $
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*/
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <asm/idals.h>
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#include <asm/todclk.h>
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#define PRINTK_HEADER "dasd_erp(3990): "
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#include "dasd_int.h"
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#include "dasd_eckd.h"
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struct DCTL_data {
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unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
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unsigned char modifier; /* Subcommand modifier */
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unsigned short res; /* reserved */
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} __attribute__ ((packed));
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/*
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*****************************************************************************
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* SECTION ERP EXAMINATION
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*****************************************************************************
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*/
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/*
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* DASD_3990_ERP_EXAMINE_24
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*
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* DESCRIPTION
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* Checks only for fatal (unrecoverable) error.
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* A detailed examination of the sense data is done later outside
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* the interrupt handler.
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*
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* Each bit configuration leading to an action code 2 (Exit with
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* programming error or unusual condition indication)
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* are handled as fatal error´s.
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*
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* All other configurations are handled as recoverable errors.
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*
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* RETURN VALUES
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* dasd_era_fatal for all fatal (unrecoverable errors)
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* dasd_era_recover for all others.
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*/
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static dasd_era_t
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dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense)
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{
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struct dasd_device *device = cqr->device;
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/* check for 'Command Reject' */
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if ((sense[0] & SNS0_CMD_REJECT) &&
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(!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
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DEV_MESSAGE(KERN_ERR, device, "%s",
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"EXAMINE 24: Command Reject detected - "
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"fatal error");
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return dasd_era_fatal;
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}
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/* check for 'Invalid Track Format' */
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if ((sense[1] & SNS1_INV_TRACK_FORMAT) &&
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(!(sense[2] & SNS2_ENV_DATA_PRESENT))) {
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DEV_MESSAGE(KERN_ERR, device, "%s",
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"EXAMINE 24: Invalid Track Format detected "
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"- fatal error");
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return dasd_era_fatal;
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}
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/* check for 'No Record Found' */
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if (sense[1] & SNS1_NO_REC_FOUND) {
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/* FIXME: fatal error ?!? */
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DEV_MESSAGE(KERN_ERR, device,
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"EXAMINE 24: No Record Found detected %s",
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device->state <= DASD_STATE_BASIC ?
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" " : "- fatal error");
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return dasd_era_fatal;
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}
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/* return recoverable for all others */
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return dasd_era_recover;
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} /* END dasd_3990_erp_examine_24 */
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/*
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* DASD_3990_ERP_EXAMINE_32
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*
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* DESCRIPTION
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* Checks only for fatal/no/recoverable error.
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* A detailed examination of the sense data is done later outside
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* the interrupt handler.
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*
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* RETURN VALUES
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* dasd_era_none no error
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* dasd_era_fatal for all fatal (unrecoverable errors)
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* dasd_era_recover for recoverable others.
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*/
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static dasd_era_t
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dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense)
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{
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struct dasd_device *device = cqr->device;
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switch (sense[25]) {
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case 0x00:
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return dasd_era_none;
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case 0x01:
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DEV_MESSAGE(KERN_ERR, device, "%s", "EXAMINE 32: fatal error");
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return dasd_era_fatal;
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default:
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return dasd_era_recover;
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}
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} /* end dasd_3990_erp_examine_32 */
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/*
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* DASD_3990_ERP_EXAMINE
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*
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* DESCRIPTION
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* Checks only for fatal/no/recover error.
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* A detailed examination of the sense data is done later outside
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* the interrupt handler.
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*
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* The logic is based on the 'IBM 3990 Storage Control Reference' manual
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* 'Chapter 7. Error Recovery Procedures'.
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*
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* RETURN VALUES
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* dasd_era_none no error
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* dasd_era_fatal for all fatal (unrecoverable errors)
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* dasd_era_recover for all others.
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*/
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dasd_era_t
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dasd_3990_erp_examine(struct dasd_ccw_req * cqr, struct irb * irb)
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{
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char *sense = irb->ecw;
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dasd_era_t era = dasd_era_recover;
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struct dasd_device *device = cqr->device;
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/* check for successful execution first */
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if (irb->scsw.cstat == 0x00 &&
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irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
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return dasd_era_none;
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/* distinguish between 24 and 32 byte sense data */
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if (sense[27] & DASD_SENSE_BIT_0) {
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era = dasd_3990_erp_examine_24(cqr, sense);
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} else {
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era = dasd_3990_erp_examine_32(cqr, sense);
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}
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/* log the erp chain if fatal error occurred */
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if ((era == dasd_era_fatal) && (device->state >= DASD_STATE_READY)) {
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dasd_log_sense(cqr, irb);
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dasd_log_ccw(cqr, 0, irb->scsw.cpa);
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}
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return era;
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} /* END dasd_3990_erp_examine */
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/*
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*****************************************************************************
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* SECTION ERP HANDLING
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*****************************************************************************
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*/
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/*
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*****************************************************************************
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* 24 and 32 byte sense ERP functions
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*****************************************************************************
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*/
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/*
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* DASD_3990_ERP_CLEANUP
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*
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* DESCRIPTION
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* Removes the already build but not necessary ERP request and sets
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* the status of the original cqr / erp to the given (final) status
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*
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* PARAMETER
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* erp request to be blocked
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* final_status either DASD_CQR_DONE or DASD_CQR_FAILED
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*
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* RETURN VALUES
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* cqr original cqr
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*/
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static struct dasd_ccw_req *
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dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
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{
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struct dasd_ccw_req *cqr = erp->refers;
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dasd_free_erp_request(erp, erp->device);
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cqr->status = final_status;
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return cqr;
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} /* end dasd_3990_erp_cleanup */
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/*
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* DASD_3990_ERP_BLOCK_QUEUE
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*
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* DESCRIPTION
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* Block the given device request queue to prevent from further
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* processing until the started timer has expired or an related
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* interrupt was received.
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*/
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static void
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dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires)
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{
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struct dasd_device *device = erp->device;
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DEV_MESSAGE(KERN_INFO, device,
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"blocking request queue for %is", expires/HZ);
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device->stopped |= DASD_STOPPED_PENDING;
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erp->status = DASD_CQR_QUEUED;
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dasd_set_timer(device, expires);
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}
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/*
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* DASD_3990_ERP_INT_REQ
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*
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* DESCRIPTION
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* Handles 'Intervention Required' error.
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* This means either device offline or not installed.
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*
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* PARAMETER
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* erp current erp
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* RETURN VALUES
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* erp modified erp
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*/
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static struct dasd_ccw_req *
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dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
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{
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struct dasd_device *device = erp->device;
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/* first time set initial retry counter and erp_function */
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/* and retry once without blocking queue */
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/* (this enables easier enqueing of the cqr) */
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if (erp->function != dasd_3990_erp_int_req) {
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erp->retries = 256;
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erp->function = dasd_3990_erp_int_req;
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} else {
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/* issue a message and wait for 'device ready' interrupt */
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DEV_MESSAGE(KERN_ERR, device, "%s",
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"is offline or not installed - "
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"INTERVENTION REQUIRED!!");
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dasd_3990_erp_block_queue(erp, 60*HZ);
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}
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return erp;
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} /* end dasd_3990_erp_int_req */
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/*
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* DASD_3990_ERP_ALTERNATE_PATH
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*
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* DESCRIPTION
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* Repeat the operation on a different channel path.
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* If all alternate paths have been tried, the request is posted with a
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* permanent error.
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*
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* PARAMETER
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* erp pointer to the current ERP
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*
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* RETURN VALUES
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* erp modified pointer to the ERP
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*/
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static void
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dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
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{
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struct dasd_device *device = erp->device;
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__u8 opm;
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/* try alternate valid path */
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opm = ccw_device_get_path_mask(device->cdev);
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//FIXME: start with get_opm ?
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if (erp->lpm == 0)
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erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum);
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else
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erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum);
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if ((erp->lpm & opm) != 0x00) {
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DEV_MESSAGE(KERN_DEBUG, device,
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"try alternate lpm=%x (lpum=%x / opm=%x)",
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erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm);
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/* reset status to queued to handle the request again... */
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if (erp->status > DASD_CQR_QUEUED)
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erp->status = DASD_CQR_QUEUED;
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erp->retries = 1;
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} else {
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DEV_MESSAGE(KERN_ERR, device,
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"No alternate channel path left (lpum=%x / "
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"opm=%x) -> permanent error",
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erp->irb.esw.esw0.sublog.lpum, opm);
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/* post request with permanent error */
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if (erp->status > DASD_CQR_QUEUED)
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erp->status = DASD_CQR_FAILED;
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}
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} /* end dasd_3990_erp_alternate_path */
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/*
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* DASD_3990_ERP_DCTL
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*
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* DESCRIPTION
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* Setup cqr to do the Diagnostic Control (DCTL) command with an
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* Inhibit Write subcommand (0x20) and the given modifier.
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*
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* PARAMETER
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* erp pointer to the current (failed) ERP
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* modifier subcommand modifier
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*
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* RETURN VALUES
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* dctl_cqr pointer to NEW dctl_cqr
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*
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*/
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static struct dasd_ccw_req *
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dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
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{
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struct dasd_device *device = erp->device;
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struct DCTL_data *DCTL_data;
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struct ccw1 *ccw;
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struct dasd_ccw_req *dctl_cqr;
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dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1,
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sizeof (struct DCTL_data),
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erp->device);
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if (IS_ERR(dctl_cqr)) {
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DEV_MESSAGE(KERN_ERR, device, "%s",
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"Unable to allocate DCTL-CQR");
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erp->status = DASD_CQR_FAILED;
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return erp;
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}
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DCTL_data = dctl_cqr->data;
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DCTL_data->subcommand = 0x02; /* Inhibit Write */
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DCTL_data->modifier = modifier;
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ccw = dctl_cqr->cpaddr;
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memset(ccw, 0, sizeof (struct ccw1));
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ccw->cmd_code = CCW_CMD_DCTL;
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ccw->count = 4;
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ccw->cda = (__u32)(addr_t) DCTL_data;
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dctl_cqr->function = dasd_3990_erp_DCTL;
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dctl_cqr->refers = erp;
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dctl_cqr->device = erp->device;
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dctl_cqr->magic = erp->magic;
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dctl_cqr->expires = 5 * 60 * HZ;
|
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dctl_cqr->retries = 2;
|
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dctl_cqr->buildclk = get_clock();
|
||
|
||
dctl_cqr->status = DASD_CQR_FILLED;
|
||
|
||
return dctl_cqr;
|
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|
||
} /* end dasd_3990_erp_DCTL */
|
||
|
||
/*
|
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* DASD_3990_ERP_ACTION_1
|
||
*
|
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* DESCRIPTION
|
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* Setup ERP to do the ERP action 1 (see Reference manual).
|
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* Repeat the operation on a different channel path.
|
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* If all alternate paths have been tried, the request is posted with a
|
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* permanent error.
|
||
* Note: duplex handling is not implemented (yet).
|
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*
|
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* PARAMETER
|
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* erp pointer to the current ERP
|
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*
|
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* RETURN VALUES
|
||
* erp pointer to the ERP
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
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dasd_3990_erp_action_1(struct dasd_ccw_req * erp)
|
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{
|
||
|
||
erp->function = dasd_3990_erp_action_1;
|
||
|
||
dasd_3990_erp_alternate_path(erp);
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_action_1 */
|
||
|
||
/*
|
||
* DASD_3990_ERP_ACTION_4
|
||
*
|
||
* DESCRIPTION
|
||
* Setup ERP to do the ERP action 4 (see Reference manual).
|
||
* Set the current request to PENDING to block the CQR queue for that device
|
||
* until the state change interrupt appears.
|
||
* Use a timer (20 seconds) to retry the cqr if the interrupt is still
|
||
* missing.
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the current ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp pointer to the ERP
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
|
||
/* first time set initial retry counter and erp_function */
|
||
/* and retry once without waiting for state change pending */
|
||
/* interrupt (this enables easier enqueing of the cqr) */
|
||
if (erp->function != dasd_3990_erp_action_4) {
|
||
|
||
DEV_MESSAGE(KERN_INFO, device, "%s",
|
||
"dasd_3990_erp_action_4: first time retry");
|
||
|
||
erp->retries = 256;
|
||
erp->function = dasd_3990_erp_action_4;
|
||
|
||
} else {
|
||
|
||
if (sense[25] == 0x1D) { /* state change pending */
|
||
|
||
DEV_MESSAGE(KERN_INFO, device,
|
||
"waiting for state change pending "
|
||
"interrupt, %d retries left",
|
||
erp->retries);
|
||
|
||
dasd_3990_erp_block_queue(erp, 30*HZ);
|
||
|
||
} else if (sense[25] == 0x1E) { /* busy */
|
||
DEV_MESSAGE(KERN_INFO, device,
|
||
"busy - redriving request later, "
|
||
"%d retries left",
|
||
erp->retries);
|
||
dasd_3990_erp_block_queue(erp, HZ);
|
||
} else {
|
||
|
||
/* no state change pending - retry */
|
||
DEV_MESSAGE (KERN_INFO, device,
|
||
"redriving request immediately, "
|
||
"%d retries left",
|
||
erp->retries);
|
||
erp->status = DASD_CQR_QUEUED;
|
||
}
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_action_4 */
|
||
|
||
/*
|
||
*****************************************************************************
|
||
* 24 byte sense ERP functions (only)
|
||
*****************************************************************************
|
||
*/
|
||
|
||
/*
|
||
* DASD_3990_ERP_ACTION_5
|
||
*
|
||
* DESCRIPTION
|
||
* Setup ERP to do the ERP action 5 (see Reference manual).
|
||
* NOTE: Further handling is done in xxx_further_erp after the retries.
|
||
*
|
||
* PARAMETER
|
||
* erp pointer to the current ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp pointer to the ERP
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
|
||
{
|
||
|
||
/* first of all retry */
|
||
erp->retries = 10;
|
||
erp->function = dasd_3990_erp_action_5;
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_action_5 */
|
||
|
||
/*
|
||
* DASD_3990_HANDLE_ENV_DATA
|
||
*
|
||
* DESCRIPTION
|
||
* Handles 24 byte 'Environmental data present'.
|
||
* Does a analysis of the sense data (message Format)
|
||
* and prints the error messages.
|
||
*
|
||
* PARAMETER
|
||
* sense current sense data
|
||
*
|
||
* RETURN VALUES
|
||
* void
|
||
*/
|
||
static void
|
||
dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
char msg_format = (sense[7] & 0xF0);
|
||
char msg_no = (sense[7] & 0x0F);
|
||
|
||
switch (msg_format) {
|
||
case 0x00: /* Format 0 - Program or System Checks */
|
||
|
||
if (sense[1] & 0x10) { /* check message to operator bit */
|
||
|
||
switch (msg_no) {
|
||
case 0x00: /* No Message */
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Invalid Command");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Invalid Command "
|
||
"Sequence");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - CCW Count less than "
|
||
"required");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Invalid Parameter");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Diagnostic of Sepecial"
|
||
" Command Violates File Mask");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Channel Returned with "
|
||
"Incorrect retry CCW");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Reset Notification");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Storage Path Restart");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device,
|
||
"FORMAT 0 - Channel requested "
|
||
"... %02x", sense[8]);
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Invalid Defective/"
|
||
"Alternate Track Pointer");
|
||
break;
|
||
case 0x0C:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - DPS Installation "
|
||
"Check");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Command Invalid on "
|
||
"Secondary Address");
|
||
break;
|
||
case 0x0F:
|
||
DEV_MESSAGE(KERN_WARNING, device,
|
||
"FORMAT 0 - Status Not As "
|
||
"Required: reason %02x", sense[8]);
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Reseved");
|
||
}
|
||
} else {
|
||
switch (msg_no) {
|
||
case 0x00: /* No Message */
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Device Error Source");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Reserved");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device,
|
||
"FORMAT 0 - Device Fenced - "
|
||
"device = %02x", sense[4]);
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Data Pinned for "
|
||
"Device");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 0 - Reserved");
|
||
}
|
||
}
|
||
break;
|
||
|
||
case 0x10: /* Format 1 - Device Equipment Checks */
|
||
switch (msg_no) {
|
||
case 0x00: /* No Message */
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Device Status 1 not as "
|
||
"expected");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Index missing");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Interruption cannot be reset");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Device did not respond to "
|
||
"selection");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Device check-2 error or Set "
|
||
"Sector is not complete");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Head address does not "
|
||
"compare");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Device status 1 not valid");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Device not ready");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Track physical address did "
|
||
"not compare");
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Missing device address bit");
|
||
break;
|
||
case 0x0C:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Drive motor switch is off");
|
||
break;
|
||
case 0x0D:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Seek incomplete");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Cylinder address did not "
|
||
"compare");
|
||
break;
|
||
case 0x0F:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Offset active cannot be "
|
||
"reset");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 1 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x20: /* Format 2 - 3990 Equipment Checks */
|
||
switch (msg_no) {
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 2 - 3990 check-2 error");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 2 - Support facility errors");
|
||
break;
|
||
case 0x0F:
|
||
DEV_MESSAGE(KERN_WARNING, device,
|
||
"FORMAT 2 - Microcode detected error %02x",
|
||
sense[8]);
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 2 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x30: /* Format 3 - 3990 Control Checks */
|
||
switch (msg_no) {
|
||
case 0x0F:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 3 - Allegiance terminated");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 3 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x40: /* Format 4 - Data Checks */
|
||
switch (msg_no) {
|
||
case 0x00:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Home address area error");
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Count area error");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Key area error");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Data area error");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in home address "
|
||
"area");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in count address "
|
||
"area");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in key area");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in data area");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Home address area error; "
|
||
"offset active");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Count area error; offset "
|
||
"active");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Key area error; offset "
|
||
"active");
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Data area error; "
|
||
"offset active");
|
||
break;
|
||
case 0x0C:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in home "
|
||
"address area; offset active");
|
||
break;
|
||
case 0x0D:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No syn byte in count "
|
||
"address area; offset active");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No sync byte in key area; "
|
||
"offset active");
|
||
break;
|
||
case 0x0F:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - No syn byte in data area; "
|
||
"offset active");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 4 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x50: /* Format 5 - Data Check with displacement information */
|
||
switch (msg_no) {
|
||
case 0x00:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the "
|
||
"home address area");
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the count area");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the key area");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the data area");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the "
|
||
"home address area; offset active");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the count area; "
|
||
"offset active");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the key area; "
|
||
"offset active");
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Data Check in the data area; "
|
||
"offset active");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 5 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */
|
||
switch (msg_no) {
|
||
case 0x00:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel A");
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel B");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel C");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel D");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel E");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel F");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel G");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Overrun on channel H");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 6 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0x70: /* Format 7 - Device Connection Control Checks */
|
||
switch (msg_no) {
|
||
case 0x00:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - RCC initiated by a connection "
|
||
"check alert");
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - RCC 1 sequence not "
|
||
"successful");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - RCC 1 and RCC 2 sequences not "
|
||
"successful");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Invalid tag-in during "
|
||
"selection sequence");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - extra RCC required");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Invalid DCC selection "
|
||
"response or timeout");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Missing end operation; device "
|
||
"transfer complete");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Missing end operation; device "
|
||
"transfer incomplete");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Invalid tag-in for an "
|
||
"immediate command sequence");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Invalid tag-in for an "
|
||
"extended command sequence");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - 3990 microcode time out when "
|
||
"stopping selection");
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - No response to selection "
|
||
"after a poll interruption");
|
||
break;
|
||
case 0x0C:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - Permanent path error (DASD "
|
||
"controller not available)");
|
||
break;
|
||
case 0x0D:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 7 - DASD controller not available"
|
||
" on disconnected command chain");
|
||
break;
|
||
default:
|
||
DEV_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:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - Error correction code "
|
||
"hardware fault");
|
||
break;
|
||
case 0x03:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - Unexpected end operation "
|
||
"response code");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - End operation with transfer "
|
||
"count not zero");
|
||
break;
|
||
case 0x05:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - End operation with transfer "
|
||
"count zero");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - DPS checks after a system "
|
||
"reset or selective reset");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - DPS cannot be filled");
|
||
break;
|
||
case 0x08:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - Short busy time-out during "
|
||
"device selection");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - DASD controller failed to "
|
||
"set or reset the long busy latch");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 8 - No interruption from device "
|
||
"during a command chain");
|
||
break;
|
||
default:
|
||
DEV_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:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 9 - Device check-2 error");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 9 - Head address did not compare");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 9 - Track physical address did "
|
||
"not compare while oriented");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 9 - Cylinder address did not "
|
||
"compare");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT 9 - Reserved");
|
||
}
|
||
break;
|
||
|
||
case 0xF0: /* Format F - Cache Storage Checks */
|
||
switch (msg_no) {
|
||
case 0x00:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Operation Terminated");
|
||
break;
|
||
case 0x01:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Subsystem Processing Error");
|
||
break;
|
||
case 0x02:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Cache or nonvolatile storage "
|
||
"equipment failure");
|
||
break;
|
||
case 0x04:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Caching terminated");
|
||
break;
|
||
case 0x06:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Cache fast write access not "
|
||
"authorized");
|
||
break;
|
||
case 0x07:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Track format incorrect");
|
||
break;
|
||
case 0x09:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Caching reinitiated");
|
||
break;
|
||
case 0x0A:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Nonvolatile storage "
|
||
"terminated");
|
||
break;
|
||
case 0x0B:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Volume is suspended duplex");
|
||
break;
|
||
case 0x0C:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Subsystem status connot be "
|
||
"determined");
|
||
break;
|
||
case 0x0D:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - Caching status reset to "
|
||
"default");
|
||
break;
|
||
case 0x0E:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT F - DASD Fast Write inhibited");
|
||
break;
|
||
default:
|
||
DEV_MESSAGE(KERN_WARNING, device, "%s",
|
||
"FORMAT D - Reserved");
|
||
}
|
||
break;
|
||
|
||
default: /* unknown message format - should not happen */
|
||
DEV_MESSAGE (KERN_WARNING, device,
|
||
"unknown message format %02x",
|
||
msg_format);
|
||
break;
|
||
} /* 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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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) {
|
||
|
||
DEV_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 */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"Command Reject - Fatal error");
|
||
|
||
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
|
||
{
|
||
|
||
struct dasd_device *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 */
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"bus out parity error or BOPC requested by "
|
||
"channel");
|
||
|
||
dasd_3990_erp_block_queue(erp, 60*HZ);
|
||
|
||
}
|
||
|
||
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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
|
||
erp->function = dasd_3990_erp_equip_check;
|
||
|
||
if (sense[1] & SNS1_WRITE_INHIBITED) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Write inhibited path encountered");
|
||
|
||
/* vary path offline */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"Path should be varied off-line. "
|
||
"This is not implemented yet \n - please report "
|
||
"to linux390@de.ibm.com");
|
||
|
||
erp = dasd_3990_erp_action_1(erp);
|
||
|
||
} else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
|
||
|
||
DEV_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) {
|
||
|
||
DEV_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 */
|
||
DEV_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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 application about the possibly "
|
||
"incorrect 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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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, DASD_CQR_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.
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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, DASD_CQR_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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, DASD_CQR_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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, DASD_CQR_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_file_prot(struct dasd_ccw_req * erp)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
|
||
DEV_MESSAGE(KERN_ERR, device, "%s", "File Protected");
|
||
|
||
return dasd_3990_erp_cleanup(erp, DASD_CQR_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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_ccw_req *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
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *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_ERP_ACTION_1B_32
|
||
*
|
||
* DESCRIPTION
|
||
* Handles 32 byte 'Action 1B' of Single Program Action Codes.
|
||
* A write operation could not be finished because of an unexpected
|
||
* condition.
|
||
* The already created 'default erp' is used to get the link to
|
||
* the erp chain, but it can not be used for this recovery
|
||
* action because it contains no DE/LO data space.
|
||
*
|
||
* PARAMETER
|
||
* default_erp already added default erp.
|
||
* sense current sense data
|
||
*
|
||
* RETURN VALUES
|
||
* erp new erp or
|
||
* default_erp in case of imprecise ending or error
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = default_erp->device;
|
||
__u32 cpa = 0;
|
||
struct dasd_ccw_req *cqr;
|
||
struct dasd_ccw_req *erp;
|
||
struct DE_eckd_data *DE_data;
|
||
char *LO_data; /* LO_eckd_data_t */
|
||
struct ccw1 *ccw;
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Write not finished because of unexpected condition");
|
||
|
||
default_erp->function = dasd_3990_erp_action_1B_32;
|
||
|
||
/* determine the original cqr */
|
||
cqr = default_erp;
|
||
|
||
while (cqr->refers != NULL) {
|
||
cqr = cqr->refers;
|
||
}
|
||
|
||
/* for imprecise ending just do default erp */
|
||
if (sense[1] & 0x01) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Imprecise ending is set - just retry");
|
||
|
||
return default_erp;
|
||
}
|
||
|
||
/* determine the address of the CCW to be restarted */
|
||
/* Imprecise ending is not set -> addr from IRB-SCSW */
|
||
cpa = default_erp->refers->irb.scsw.cpa;
|
||
|
||
if (cpa == 0) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Unable to determine address of the CCW "
|
||
"to be restarted");
|
||
|
||
return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
|
||
}
|
||
|
||
/* Build new ERP request including DE/LO */
|
||
erp = dasd_alloc_erp_request((char *) &cqr->magic,
|
||
2 + 1,/* DE/LO + TIC */
|
||
sizeof (struct DE_eckd_data) +
|
||
sizeof (struct LO_eckd_data), device);
|
||
|
||
if (IS_ERR(erp)) {
|
||
DEV_MESSAGE(KERN_ERR, device, "%s", "Unable to allocate ERP");
|
||
return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
|
||
}
|
||
|
||
/* use original DE */
|
||
DE_data = erp->data;
|
||
memcpy(DE_data, cqr->data, sizeof (struct DE_eckd_data));
|
||
|
||
/* create LO */
|
||
LO_data = erp->data + sizeof (struct DE_eckd_data);
|
||
|
||
if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
|
||
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"BUG - this should not happen");
|
||
|
||
return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
|
||
}
|
||
|
||
if ((sense[7] & 0x3F) == 0x01) {
|
||
/* operation code is WRITE DATA -> data area orientation */
|
||
LO_data[0] = 0x81;
|
||
|
||
} else if ((sense[7] & 0x3F) == 0x03) {
|
||
/* operation code is FORMAT WRITE -> index orientation */
|
||
LO_data[0] = 0xC3;
|
||
|
||
} else {
|
||
LO_data[0] = sense[7]; /* operation */
|
||
}
|
||
|
||
LO_data[1] = sense[8]; /* auxiliary */
|
||
LO_data[2] = sense[9];
|
||
LO_data[3] = sense[3]; /* count */
|
||
LO_data[4] = sense[29]; /* seek_addr.cyl */
|
||
LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
|
||
LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
|
||
|
||
memcpy(&(LO_data[8]), &(sense[11]), 8);
|
||
|
||
/* create DE ccw */
|
||
ccw = erp->cpaddr;
|
||
memset(ccw, 0, sizeof (struct ccw1));
|
||
ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
|
||
ccw->flags = CCW_FLAG_CC;
|
||
ccw->count = 16;
|
||
ccw->cda = (__u32)(addr_t) DE_data;
|
||
|
||
/* create LO ccw */
|
||
ccw++;
|
||
memset(ccw, 0, sizeof (struct ccw1));
|
||
ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD;
|
||
ccw->flags = CCW_FLAG_CC;
|
||
ccw->count = 16;
|
||
ccw->cda = (__u32)(addr_t) LO_data;
|
||
|
||
/* TIC to the failed ccw */
|
||
ccw++;
|
||
ccw->cmd_code = CCW_CMD_TIC;
|
||
ccw->cda = cpa;
|
||
|
||
/* fill erp related fields */
|
||
erp->function = dasd_3990_erp_action_1B_32;
|
||
erp->refers = default_erp->refers;
|
||
erp->device = device;
|
||
erp->magic = default_erp->magic;
|
||
erp->expires = 0;
|
||
erp->retries = 256;
|
||
erp->buildclk = get_clock();
|
||
erp->status = DASD_CQR_FILLED;
|
||
|
||
/* remove the default erp */
|
||
dasd_free_erp_request(default_erp, device);
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_action_1B_32 */
|
||
|
||
/*
|
||
* DASD_3990_UPDATE_1B
|
||
*
|
||
* DESCRIPTION
|
||
* Handles the update to the 32 byte 'Action 1B' of Single Program
|
||
* Action Codes in case the first action was not successful.
|
||
* The already created 'previous_erp' is the currently not successful
|
||
* ERP.
|
||
*
|
||
* PARAMETER
|
||
* previous_erp already created previous erp.
|
||
* sense current sense data
|
||
* RETURN VALUES
|
||
* erp modified erp
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = previous_erp->device;
|
||
__u32 cpa = 0;
|
||
struct dasd_ccw_req *cqr;
|
||
struct dasd_ccw_req *erp;
|
||
char *LO_data; /* struct LO_eckd_data */
|
||
struct ccw1 *ccw;
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Write not finished because of unexpected condition"
|
||
" - follow on");
|
||
|
||
/* determine the original cqr */
|
||
cqr = previous_erp;
|
||
|
||
while (cqr->refers != NULL) {
|
||
cqr = cqr->refers;
|
||
}
|
||
|
||
/* for imprecise ending just do default erp */
|
||
if (sense[1] & 0x01) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Imprecise ending is set - just retry");
|
||
|
||
previous_erp->status = DASD_CQR_QUEUED;
|
||
|
||
return previous_erp;
|
||
}
|
||
|
||
/* determine the address of the CCW to be restarted */
|
||
/* Imprecise ending is not set -> addr from IRB-SCSW */
|
||
cpa = previous_erp->irb.scsw.cpa;
|
||
|
||
if (cpa == 0) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Unable to determine address of the CCW "
|
||
"to be restarted");
|
||
|
||
previous_erp->status = DASD_CQR_FAILED;
|
||
|
||
return previous_erp;
|
||
}
|
||
|
||
erp = previous_erp;
|
||
|
||
/* update the LO with the new returned sense data */
|
||
LO_data = erp->data + sizeof (struct DE_eckd_data);
|
||
|
||
if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) {
|
||
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"BUG - this should not happen");
|
||
|
||
previous_erp->status = DASD_CQR_FAILED;
|
||
|
||
return previous_erp;
|
||
}
|
||
|
||
if ((sense[7] & 0x3F) == 0x01) {
|
||
/* operation code is WRITE DATA -> data area orientation */
|
||
LO_data[0] = 0x81;
|
||
|
||
} else if ((sense[7] & 0x3F) == 0x03) {
|
||
/* operation code is FORMAT WRITE -> index orientation */
|
||
LO_data[0] = 0xC3;
|
||
|
||
} else {
|
||
LO_data[0] = sense[7]; /* operation */
|
||
}
|
||
|
||
LO_data[1] = sense[8]; /* auxiliary */
|
||
LO_data[2] = sense[9];
|
||
LO_data[3] = sense[3]; /* count */
|
||
LO_data[4] = sense[29]; /* seek_addr.cyl */
|
||
LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */
|
||
LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */
|
||
|
||
memcpy(&(LO_data[8]), &(sense[11]), 8);
|
||
|
||
/* TIC to the failed ccw */
|
||
ccw = erp->cpaddr; /* addr of DE ccw */
|
||
ccw++; /* addr of LE ccw */
|
||
ccw++; /* addr of TIC ccw */
|
||
ccw->cda = cpa;
|
||
|
||
erp->status = DASD_CQR_QUEUED;
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_update_1B */
|
||
|
||
/*
|
||
* DASD_3990_ERP_COMPOUND_RETRY
|
||
*
|
||
* DESCRIPTION
|
||
* Handles the compound ERP action retry code.
|
||
* NOTE: At least one retry is done even if zero is specified
|
||
* by the sense data. This makes enqueueing of the request
|
||
* easier.
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the currently created ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp modified ERP pointer
|
||
*
|
||
*/
|
||
static void
|
||
dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
switch (sense[25] & 0x03) {
|
||
case 0x00: /* no not retry */
|
||
erp->retries = 1;
|
||
break;
|
||
|
||
case 0x01: /* retry 2 times */
|
||
erp->retries = 2;
|
||
break;
|
||
|
||
case 0x02: /* retry 10 times */
|
||
erp->retries = 10;
|
||
break;
|
||
|
||
case 0x03: /* retry 256 times */
|
||
erp->retries = 256;
|
||
break;
|
||
|
||
default:
|
||
BUG();
|
||
}
|
||
|
||
erp->function = dasd_3990_erp_compound_retry;
|
||
|
||
} /* end dasd_3990_erp_compound_retry */
|
||
|
||
/*
|
||
* DASD_3990_ERP_COMPOUND_PATH
|
||
*
|
||
* DESCRIPTION
|
||
* Handles the compound ERP action for retry on alternate
|
||
* channel path.
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the currently created ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp modified ERP pointer
|
||
*
|
||
*/
|
||
static void
|
||
dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
if (sense[25] & DASD_SENSE_BIT_3) {
|
||
dasd_3990_erp_alternate_path(erp);
|
||
|
||
if (erp->status == DASD_CQR_FAILED) {
|
||
/* reset the lpm and the status to be able to
|
||
* try further actions. */
|
||
|
||
erp->lpm = 0;
|
||
|
||
erp->status = DASD_CQR_ERROR;
|
||
|
||
}
|
||
}
|
||
|
||
erp->function = dasd_3990_erp_compound_path;
|
||
|
||
} /* end dasd_3990_erp_compound_path */
|
||
|
||
/*
|
||
* DASD_3990_ERP_COMPOUND_CODE
|
||
*
|
||
* DESCRIPTION
|
||
* Handles the compound ERP action for retry code.
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the currently created ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp NEW ERP pointer
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
if (sense[25] & DASD_SENSE_BIT_2) {
|
||
|
||
switch (sense[28]) {
|
||
case 0x17:
|
||
/* issue a Diagnostic Control command with an
|
||
* Inhibit Write subcommand and controler modifier */
|
||
erp = dasd_3990_erp_DCTL(erp, 0x20);
|
||
break;
|
||
|
||
case 0x25:
|
||
/* wait for 5 seconds and retry again */
|
||
erp->retries = 1;
|
||
|
||
dasd_3990_erp_block_queue (erp, 5*HZ);
|
||
break;
|
||
|
||
default:
|
||
/* should not happen - continue */
|
||
break;
|
||
}
|
||
}
|
||
|
||
erp->function = dasd_3990_erp_compound_code;
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_compound_code */
|
||
|
||
/*
|
||
* DASD_3990_ERP_COMPOUND_CONFIG
|
||
*
|
||
* DESCRIPTION
|
||
* Handles the compound ERP action for configruation
|
||
* dependent error.
|
||
* Note: duplex handling is not implemented (yet).
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the currently created ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp modified ERP pointer
|
||
*
|
||
*/
|
||
static void
|
||
dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
|
||
|
||
/* set to suspended duplex state then restart */
|
||
struct dasd_device *device = erp->device;
|
||
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"Set device to suspended duplex state should be "
|
||
"done!\n"
|
||
"This is not implemented yet (for compound ERP)"
|
||
" - please report to linux390@de.ibm.com");
|
||
|
||
}
|
||
|
||
erp->function = dasd_3990_erp_compound_config;
|
||
|
||
} /* end dasd_3990_erp_compound_config */
|
||
|
||
/*
|
||
* DASD_3990_ERP_COMPOUND
|
||
*
|
||
* DESCRIPTION
|
||
* Does the further compound program action if
|
||
* compound retry was not successful.
|
||
*
|
||
* PARAMETER
|
||
* sense sense data of the actual error
|
||
* erp pointer to the current (failed) ERP
|
||
*
|
||
* RETURN VALUES
|
||
* erp (additional) ERP pointer
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
if ((erp->function == dasd_3990_erp_compound_retry) &&
|
||
(erp->status == DASD_CQR_ERROR)) {
|
||
|
||
dasd_3990_erp_compound_path(erp, sense);
|
||
}
|
||
|
||
if ((erp->function == dasd_3990_erp_compound_path) &&
|
||
(erp->status == DASD_CQR_ERROR)) {
|
||
|
||
erp = dasd_3990_erp_compound_code(erp, sense);
|
||
}
|
||
|
||
if ((erp->function == dasd_3990_erp_compound_code) &&
|
||
(erp->status == DASD_CQR_ERROR)) {
|
||
|
||
dasd_3990_erp_compound_config(erp, sense);
|
||
}
|
||
|
||
/* if no compound action ERP specified, the request failed */
|
||
if (erp->status == DASD_CQR_ERROR) {
|
||
|
||
erp->status = DASD_CQR_FAILED;
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_compound */
|
||
|
||
/*
|
||
* DASD_3990_ERP_INSPECT_32
|
||
*
|
||
* DESCRIPTION
|
||
* Does a detailed inspection of the 32 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_filled pointer to the ERP
|
||
*
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
|
||
erp->function = dasd_3990_erp_inspect_32;
|
||
|
||
if (sense[25] & DASD_SENSE_BIT_0) {
|
||
|
||
/* compound program action codes (byte25 bit 0 == '1') */
|
||
dasd_3990_erp_compound_retry(erp, sense);
|
||
|
||
} else {
|
||
|
||
/* single program action codes (byte25 bit 0 == '0') */
|
||
switch (sense[25]) {
|
||
|
||
case 0x00: /* success - use default ERP for retries */
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"ERP called for successful request"
|
||
" - just retry");
|
||
break;
|
||
|
||
case 0x01: /* fatal error */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"Fatal error should have been "
|
||
"handled within the interrupt handler");
|
||
|
||
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
||
break;
|
||
|
||
case 0x02: /* intervention required */
|
||
case 0x03: /* intervention required during dual copy */
|
||
erp = dasd_3990_erp_int_req(erp);
|
||
break;
|
||
|
||
case 0x0F: /* length mismatch during update write command */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"update write command error - should not "
|
||
"happen;\n"
|
||
"Please send this message together with "
|
||
"the above sense data to linux390@de."
|
||
"ibm.com");
|
||
|
||
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
||
break;
|
||
|
||
case 0x10: /* logging required for other channel program */
|
||
erp = dasd_3990_erp_action_10_32(erp, sense);
|
||
break;
|
||
|
||
case 0x15: /* next track outside defined extend */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"next track outside defined extend - "
|
||
"should not happen;\n"
|
||
"Please send this message together with "
|
||
"the above sense data to linux390@de."
|
||
"ibm.com");
|
||
|
||
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
||
break;
|
||
|
||
case 0x1B: /* unexpected condition during write */
|
||
|
||
erp = dasd_3990_erp_action_1B_32(erp, sense);
|
||
break;
|
||
|
||
case 0x1C: /* invalid data */
|
||
DEV_MESSAGE(KERN_EMERG, device, "%s",
|
||
"Data recovered during retry with PCI "
|
||
"fetch mode active");
|
||
|
||
/* not possible to handle this situation in Linux */
|
||
panic
|
||
("Invalid data - No way to inform application "
|
||
"about the possibly incorrect data");
|
||
break;
|
||
|
||
case 0x1D: /* state-change pending */
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"A State change pending condition exists "
|
||
"for the subsystem or device");
|
||
|
||
erp = dasd_3990_erp_action_4(erp, sense);
|
||
break;
|
||
|
||
case 0x1E: /* busy */
|
||
DEV_MESSAGE(KERN_DEBUG, device, "%s",
|
||
"Busy condition exists "
|
||
"for the subsystem or device");
|
||
erp = dasd_3990_erp_action_4(erp, sense);
|
||
break;
|
||
|
||
default: /* all others errors - default erp */
|
||
break;
|
||
}
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_inspect_32 */
|
||
|
||
/*
|
||
*****************************************************************************
|
||
* main ERP control fuctions (24 and 32 byte sense)
|
||
*****************************************************************************
|
||
*/
|
||
|
||
/*
|
||
* DASD_3990_ERP_INSPECT
|
||
*
|
||
* DESCRIPTION
|
||
* Does a detailed inspection for sense data by calling either
|
||
* the 24-byte or the 32-byte inspection routine.
|
||
*
|
||
* PARAMETER
|
||
* erp pointer to the currently created default ERP
|
||
* RETURN VALUES
|
||
* erp_new contens was possibly modified
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_inspect(struct dasd_ccw_req * erp)
|
||
{
|
||
|
||
struct dasd_ccw_req *erp_new = NULL;
|
||
/* sense data are located in the refers record of the */
|
||
/* already set up new ERP ! */
|
||
char *sense = erp->refers->irb.ecw;
|
||
|
||
/* distinguish between 24 and 32 byte sense data */
|
||
if (sense[27] & DASD_SENSE_BIT_0) {
|
||
|
||
/* inspect the 24 byte sense data */
|
||
erp_new = dasd_3990_erp_inspect_24(erp, sense);
|
||
|
||
} else {
|
||
|
||
/* inspect the 32 byte sense data */
|
||
erp_new = dasd_3990_erp_inspect_32(erp, sense);
|
||
|
||
} /* end distinguish between 24 and 32 byte sense data */
|
||
|
||
return erp_new;
|
||
}
|
||
|
||
/*
|
||
* DASD_3990_ERP_ADD_ERP
|
||
*
|
||
* DESCRIPTION
|
||
* This funtion adds an additional request block (ERP) to the head of
|
||
* the given cqr (or erp).
|
||
* This erp is initialized as an default erp (retry TIC)
|
||
*
|
||
* PARAMETER
|
||
* cqr head of the current ERP-chain (or single cqr if
|
||
* first error)
|
||
* RETURN VALUES
|
||
* erp pointer to new ERP-chain head
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_add_erp(struct dasd_ccw_req * cqr)
|
||
{
|
||
|
||
struct dasd_device *device = cqr->device;
|
||
struct ccw1 *ccw;
|
||
|
||
/* allocate additional request block */
|
||
struct dasd_ccw_req *erp;
|
||
|
||
erp = dasd_alloc_erp_request((char *) &cqr->magic, 2, 0, cqr->device);
|
||
if (IS_ERR(erp)) {
|
||
if (cqr->retries <= 0) {
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"Unable to allocate ERP request");
|
||
cqr->status = DASD_CQR_FAILED;
|
||
cqr->stopclk = get_clock ();
|
||
} else {
|
||
DEV_MESSAGE (KERN_ERR, device,
|
||
"Unable to allocate ERP request "
|
||
"(%i retries left)",
|
||
cqr->retries);
|
||
dasd_set_timer(device, (HZ << 3));
|
||
}
|
||
return cqr;
|
||
}
|
||
|
||
/* initialize request with default TIC to current ERP/CQR */
|
||
ccw = erp->cpaddr;
|
||
ccw->cmd_code = CCW_CMD_NOOP;
|
||
ccw->flags = CCW_FLAG_CC;
|
||
ccw++;
|
||
ccw->cmd_code = CCW_CMD_TIC;
|
||
ccw->cda = (long)(cqr->cpaddr);
|
||
erp->function = dasd_3990_erp_add_erp;
|
||
erp->refers = cqr;
|
||
erp->device = cqr->device;
|
||
erp->magic = cqr->magic;
|
||
erp->expires = 0;
|
||
erp->retries = 256;
|
||
erp->buildclk = get_clock();
|
||
|
||
erp->status = DASD_CQR_FILLED;
|
||
|
||
return erp;
|
||
}
|
||
|
||
/*
|
||
* DASD_3990_ERP_ADDITIONAL_ERP
|
||
*
|
||
* DESCRIPTION
|
||
* An additional ERP is needed to handle the current error.
|
||
* Add ERP to the head of the ERP-chain containing the ERP processing
|
||
* determined based on the sense data.
|
||
*
|
||
* PARAMETER
|
||
* cqr head of the current ERP-chain (or single cqr if
|
||
* first error)
|
||
*
|
||
* RETURN VALUES
|
||
* erp pointer to new ERP-chain head
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr)
|
||
{
|
||
|
||
struct dasd_ccw_req *erp = NULL;
|
||
|
||
/* add erp and initialize with default TIC */
|
||
erp = dasd_3990_erp_add_erp(cqr);
|
||
|
||
/* inspect sense, determine specific ERP if possible */
|
||
if (erp != cqr) {
|
||
|
||
erp = dasd_3990_erp_inspect(erp);
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_additional_erp */
|
||
|
||
/*
|
||
* DASD_3990_ERP_ERROR_MATCH
|
||
*
|
||
* DESCRIPTION
|
||
* Check if the device status of the given cqr is the same.
|
||
* This means that the failed CCW and the relevant sense data
|
||
* must match.
|
||
* I don't distinguish between 24 and 32 byte sense because in case of
|
||
* 24 byte sense byte 25 and 27 is set as well.
|
||
*
|
||
* PARAMETER
|
||
* cqr1 first cqr, which will be compared with the
|
||
* cqr2 second cqr.
|
||
*
|
||
* RETURN VALUES
|
||
* match 'boolean' for match found
|
||
* returns 1 if match found, otherwise 0.
|
||
*/
|
||
static int
|
||
dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
|
||
{
|
||
|
||
/* check failed CCW */
|
||
if (cqr1->irb.scsw.cpa != cqr2->irb.scsw.cpa) {
|
||
// return 0; /* CCW doesn't match */
|
||
}
|
||
|
||
/* check sense data; byte 0-2,25,27 */
|
||
if (!((memcmp (cqr1->irb.ecw, cqr2->irb.ecw, 3) == 0) &&
|
||
(cqr1->irb.ecw[27] == cqr2->irb.ecw[27]) &&
|
||
(cqr1->irb.ecw[25] == cqr2->irb.ecw[25]))) {
|
||
|
||
return 0; /* sense doesn't match */
|
||
}
|
||
|
||
return 1; /* match */
|
||
|
||
} /* end dasd_3990_erp_error_match */
|
||
|
||
/*
|
||
* DASD_3990_ERP_IN_ERP
|
||
*
|
||
* DESCRIPTION
|
||
* check if the current error already happened before.
|
||
* quick exit if current cqr is not an ERP (cqr->refers=NULL)
|
||
*
|
||
* PARAMETER
|
||
* cqr failed cqr (either original cqr or already an erp)
|
||
*
|
||
* RETURN VALUES
|
||
* erp erp-pointer to the already defined error
|
||
* recovery procedure OR
|
||
* NULL if a 'new' error occurred.
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr)
|
||
{
|
||
|
||
struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */
|
||
*erp_match = NULL; /* save erp chain head */
|
||
int match = 0; /* 'boolean' for matching error found */
|
||
|
||
if (cqr->refers == NULL) { /* return if not in erp */
|
||
return NULL;
|
||
}
|
||
|
||
/* check the erp/cqr chain for current error */
|
||
do {
|
||
match = dasd_3990_erp_error_match(erp_head, cqr->refers);
|
||
erp_match = cqr; /* save possible matching erp */
|
||
cqr = cqr->refers; /* check next erp/cqr in queue */
|
||
|
||
} while ((cqr->refers != NULL) && (!match));
|
||
|
||
if (!match) {
|
||
return NULL; /* no match was found */
|
||
}
|
||
|
||
return erp_match; /* return address of matching erp */
|
||
|
||
} /* END dasd_3990_erp_in_erp */
|
||
|
||
/*
|
||
* DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense)
|
||
*
|
||
* DESCRIPTION
|
||
* No retry is left for the current ERP. Check what has to be done
|
||
* with the ERP.
|
||
* - do further defined ERP action or
|
||
* - wait for interrupt or
|
||
* - exit with permanent error
|
||
*
|
||
* PARAMETER
|
||
* erp ERP which is in progress with no retry left
|
||
*
|
||
* RETURN VALUES
|
||
* erp modified/additional ERP
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
|
||
{
|
||
|
||
struct dasd_device *device = erp->device;
|
||
char *sense = erp->irb.ecw;
|
||
|
||
/* check for 24 byte sense ERP */
|
||
if ((erp->function == dasd_3990_erp_bus_out) ||
|
||
(erp->function == dasd_3990_erp_action_1) ||
|
||
(erp->function == dasd_3990_erp_action_4)) {
|
||
|
||
erp = dasd_3990_erp_action_1(erp);
|
||
|
||
} else if (erp->function == dasd_3990_erp_action_5) {
|
||
|
||
/* retries have not been successful */
|
||
/* prepare erp for retry on different channel path */
|
||
erp = dasd_3990_erp_action_1(erp);
|
||
|
||
if (!(sense[2] & DASD_SENSE_BIT_0)) {
|
||
|
||
/* issue a Diagnostic Control command with an
|
||
* Inhibit Write subcommand */
|
||
|
||
switch (sense[25]) {
|
||
case 0x17:
|
||
case 0x57:{ /* controller */
|
||
erp = dasd_3990_erp_DCTL(erp, 0x20);
|
||
break;
|
||
}
|
||
case 0x18:
|
||
case 0x58:{ /* channel path */
|
||
erp = dasd_3990_erp_DCTL(erp, 0x40);
|
||
break;
|
||
}
|
||
case 0x19:
|
||
case 0x59:{ /* storage director */
|
||
erp = dasd_3990_erp_DCTL(erp, 0x80);
|
||
break;
|
||
}
|
||
default:
|
||
DEV_MESSAGE(KERN_DEBUG, device,
|
||
"invalid subcommand modifier 0x%x "
|
||
"for Diagnostic Control Command",
|
||
sense[25]);
|
||
}
|
||
}
|
||
|
||
/* check for 32 byte sense ERP */
|
||
} else if ((erp->function == dasd_3990_erp_compound_retry) ||
|
||
(erp->function == dasd_3990_erp_compound_path) ||
|
||
(erp->function == dasd_3990_erp_compound_code) ||
|
||
(erp->function == dasd_3990_erp_compound_config)) {
|
||
|
||
erp = dasd_3990_erp_compound(erp, sense);
|
||
|
||
} else {
|
||
/* No retry left and no additional special handling */
|
||
/*necessary */
|
||
DEV_MESSAGE(KERN_ERR, device,
|
||
"no retries left for erp %p - "
|
||
"set status to FAILED", erp);
|
||
|
||
erp->status = DASD_CQR_FAILED;
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_further_erp */
|
||
|
||
/*
|
||
* DASD_3990_ERP_HANDLE_MATCH_ERP
|
||
*
|
||
* DESCRIPTION
|
||
* An error occurred again and an ERP has been detected which is already
|
||
* used to handle this error (e.g. retries).
|
||
* All prior ERP's are asumed to be successful and therefore removed
|
||
* from queue.
|
||
* If retry counter of matching erp is already 0, it is checked if further
|
||
* action is needed (besides retry) or if the ERP has failed.
|
||
*
|
||
* PARAMETER
|
||
* erp_head first ERP in ERP-chain
|
||
* erp ERP that handles the actual error.
|
||
* (matching erp)
|
||
*
|
||
* RETURN VALUES
|
||
* erp modified/additional ERP
|
||
*/
|
||
static struct dasd_ccw_req *
|
||
dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head,
|
||
struct dasd_ccw_req *erp)
|
||
{
|
||
|
||
struct dasd_device *device = erp_head->device;
|
||
struct dasd_ccw_req *erp_done = erp_head; /* finished req */
|
||
struct dasd_ccw_req *erp_free = NULL; /* req to be freed */
|
||
|
||
/* loop over successful ERPs and remove them from chanq */
|
||
while (erp_done != erp) {
|
||
|
||
if (erp_done == NULL) /* end of chain reached */
|
||
panic(PRINTK_HEADER "Programming error in ERP! The "
|
||
"original request was lost\n");
|
||
|
||
/* remove the request from the device queue */
|
||
list_del(&erp_done->list);
|
||
|
||
erp_free = erp_done;
|
||
erp_done = erp_done->refers;
|
||
|
||
/* free the finished erp request */
|
||
dasd_free_erp_request(erp_free, erp_free->device);
|
||
|
||
} /* end while */
|
||
|
||
if (erp->retries > 0) {
|
||
|
||
char *sense = erp->refers->irb.ecw;
|
||
|
||
/* check for special retries */
|
||
if (erp->function == dasd_3990_erp_action_4) {
|
||
|
||
erp = dasd_3990_erp_action_4(erp, sense);
|
||
|
||
} else if (erp->function == dasd_3990_erp_action_1B_32) {
|
||
|
||
erp = dasd_3990_update_1B(erp, sense);
|
||
|
||
} else if (erp->function == dasd_3990_erp_int_req) {
|
||
|
||
erp = dasd_3990_erp_int_req(erp);
|
||
|
||
} else {
|
||
/* simple retry */
|
||
DEV_MESSAGE(KERN_DEBUG, device,
|
||
"%i retries left for erp %p",
|
||
erp->retries, erp);
|
||
|
||
/* handle the request again... */
|
||
erp->status = DASD_CQR_QUEUED;
|
||
}
|
||
|
||
} else {
|
||
/* no retry left - check for further necessary action */
|
||
/* if no further actions, handle rest as permanent error */
|
||
erp = dasd_3990_erp_further_erp(erp);
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_handle_match_erp */
|
||
|
||
/*
|
||
* DASD_3990_ERP_ACTION
|
||
*
|
||
* DESCRIPTION
|
||
* controll routine for 3990 erp actions.
|
||
* Has to be called with the queue lock (namely the s390_irq_lock) acquired.
|
||
*
|
||
* PARAMETER
|
||
* cqr failed cqr (either original cqr or already an erp)
|
||
*
|
||
* RETURN VALUES
|
||
* erp erp-pointer to the head of the ERP action chain.
|
||
* This means:
|
||
* - either a ptr to an additional ERP cqr or
|
||
* - the original given cqr (which's status might
|
||
* be modified)
|
||
*/
|
||
struct dasd_ccw_req *
|
||
dasd_3990_erp_action(struct dasd_ccw_req * cqr)
|
||
{
|
||
|
||
struct dasd_ccw_req *erp = NULL;
|
||
struct dasd_device *device = cqr->device;
|
||
__u32 cpa = cqr->irb.scsw.cpa;
|
||
|
||
#ifdef ERP_DEBUG
|
||
/* print current erp_chain */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s",
|
||
"ERP chain at BEGINNING of ERP-ACTION");
|
||
{
|
||
struct dasd_ccw_req *temp_erp = NULL;
|
||
|
||
for (temp_erp = cqr;
|
||
temp_erp != NULL; temp_erp = temp_erp->refers) {
|
||
|
||
DEV_MESSAGE(KERN_ERR, device,
|
||
" erp %p (%02x) refers to %p",
|
||
temp_erp, temp_erp->status,
|
||
temp_erp->refers);
|
||
}
|
||
}
|
||
#endif /* ERP_DEBUG */
|
||
|
||
/* double-check if current erp/cqr was successfull */
|
||
if ((cqr->irb.scsw.cstat == 0x00) &&
|
||
(cqr->irb.scsw.dstat == (DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
|
||
|
||
DEV_MESSAGE(KERN_DEBUG, device,
|
||
"ERP called for successful request %p"
|
||
" - NO ERP necessary", cqr);
|
||
|
||
cqr->status = DASD_CQR_DONE;
|
||
|
||
return cqr;
|
||
}
|
||
/* check if sense data are available */
|
||
if (!cqr->irb.ecw) {
|
||
DEV_MESSAGE(KERN_DEBUG, device,
|
||
"ERP called witout sense data avail ..."
|
||
"request %p - NO ERP possible", cqr);
|
||
|
||
cqr->status = DASD_CQR_FAILED;
|
||
|
||
return cqr;
|
||
|
||
}
|
||
|
||
/* check if error happened before */
|
||
erp = dasd_3990_erp_in_erp(cqr);
|
||
|
||
if (erp == NULL) {
|
||
/* no matching erp found - set up erp */
|
||
erp = dasd_3990_erp_additional_erp(cqr);
|
||
} else {
|
||
/* matching erp found - set all leading erp's to DONE */
|
||
erp = dasd_3990_erp_handle_match_erp(cqr, erp);
|
||
}
|
||
|
||
#ifdef ERP_DEBUG
|
||
/* print current erp_chain */
|
||
DEV_MESSAGE(KERN_ERR, device, "%s", "ERP chain at END of ERP-ACTION");
|
||
{
|
||
struct dasd_ccw_req *temp_erp = NULL;
|
||
for (temp_erp = erp;
|
||
temp_erp != NULL; temp_erp = temp_erp->refers) {
|
||
|
||
DEV_MESSAGE(KERN_ERR, device,
|
||
" erp %p (%02x) refers to %p",
|
||
temp_erp, temp_erp->status,
|
||
temp_erp->refers);
|
||
}
|
||
}
|
||
#endif /* ERP_DEBUG */
|
||
|
||
if (erp->status == DASD_CQR_FAILED)
|
||
dasd_log_ccw(erp, 1, cpa);
|
||
|
||
/* enqueue added ERP request */
|
||
if (erp->status == DASD_CQR_FILLED) {
|
||
erp->status = DASD_CQR_QUEUED;
|
||
list_add(&erp->list, &device->ccw_queue);
|
||
}
|
||
|
||
return erp;
|
||
|
||
} /* end dasd_3990_erp_action */
|
||
|
||
/*
|
||
* Overrides for Emacs so that we follow Linus's tabbing style.
|
||
* Emacs will notice this stuff at the end of the file and automatically
|
||
* adjust the settings for this buffer only. This must remain at the end
|
||
* of the file.
|
||
* ---------------------------------------------------------------------------
|
||
* Local variables:
|
||
* c-indent-level: 4
|
||
* c-brace-imaginary-offset: 0
|
||
* c-brace-offset: -4
|
||
* c-argdecl-indent: 4
|
||
* c-label-offset: -4
|
||
* c-continued-statement-offset: 4
|
||
* c-continued-brace-offset: 0
|
||
* indent-tabs-mode: 1
|
||
* tab-width: 8
|
||
* End:
|
||
*/
|