URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [s390/] [block/] [dasd_3990_erp.c] - Rev 1765
Compare with Previous | Blame | View Log
/* * File...........: linux/drivers/s390/block/dasd_3990_erp.c * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com> * Holger Smolinski <Holger.Smolinski@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000, 2001 * * $Revision: 1.1.1.1 $ * * History of changes: * 05/14/01 fixed PL030160GTO (BUG() in erp_action_5) */ #include <asm/ccwcache.h> #include <asm/idals.h> #include <asm/s390io.h> #include <linux/timer.h> #include "dasd_int.h" #include "dasd_eckd.h" #include "dasd_3990_erp.h" #ifdef PRINTK_HEADER #undef PRINTK_HEADER #endif /* PRINTK_HEADER */ #define PRINTK_HEADER "dasd_erp(3990): " /* ***************************************************************************** * SECTION DEBUG ROUTINES ***************************************************************************** */ void log_erp_chain (ccw_req_t *cqr, int caller, __u32 cpa) { ccw_req_t *loop_cqr = cqr; dasd_device_t *device = cqr->device; int i; char *nl, *end_cqr, *begin, *end, buffer[80]; /* dump sense data */ if (device->discipline && device->discipline->dump_sense ) { device->discipline->dump_sense (device, cqr); } /* log the channel program */ while (loop_cqr != NULL) { DEV_MESSAGE (KERN_ERR, device, "(%s) ERP chain report for req: %p", caller == 0 ? "EXAMINE" : "ACTION", loop_cqr); nl = (char *) loop_cqr; end_cqr = nl + sizeof (ccw_req_t); while (nl < end_cqr) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl +=16; } DEV_MESSAGE (KERN_ERR, device, "DATA area is at: %p", loop_cqr->data); nl = (char *) loop_cqr->data; end_cqr = nl + loop_cqr->datasize; while (nl < end_cqr) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl +=16; } nl = (char *) loop_cqr->cpaddr; if (loop_cqr->cplength > 40) { /* log only parts of the CP */ DEV_MESSAGE (KERN_ERR, device, "%s", "Start of channel program:"); for (i = 0; i < 20; i += 2) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl += 16; } DEV_MESSAGE (KERN_ERR, device, "%s", "End of channel program:"); nl = (char *) loop_cqr->cpaddr; nl += ((loop_cqr->cplength - 10) * 8); for (i = 0; i < 20; i += 2) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl += 16; } } else { /* log the whole CP */ DEV_MESSAGE (KERN_ERR, device, "%s", "Channel program (complete):"); for (i = 0; i < (loop_cqr->cplength + 4); i += 2) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl += 16; } } /* log bytes arround failed CCW if not already done */ begin = (char *) loop_cqr->cpaddr; end = begin + ((loop_cqr->cplength+4) * 8); nl = (void *)(long)cpa; if (loop_cqr == cqr) { /* log only once */ /* if not whole CP logged OR CCW outside logged CP */ if ((loop_cqr->cplength > 40) || ((nl < begin ) && (nl > end ) ) ) { nl -= 10*8; /* start some bytes before */ DEV_MESSAGE (KERN_ERR, device, "Failed CCW (%p) (area):", (void *)(long)cpa); for (i = 0; i < 20; i += 2) { sprintf (buffer, "%p: %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x" " %02x%02x%02x%02x", nl, nl[0], nl[1], nl[2], nl[3], nl[4], nl[5], nl[6], nl[7], nl[8], nl[9], nl[10], nl[11], nl[12], nl[13], nl[14], nl[15]); DEV_MESSAGE (KERN_ERR, device, "%s", buffer); nl += 16; } } else { DEV_MESSAGE (KERN_ERR, device, "Failed CCW (%p) already logged", (void *)(long)cpa); } } loop_cqr = loop_cqr->refers; } } /* end log_erp_chain */ /* ***************************************************************************** * SECTION ERP EXAMINATION ***************************************************************************** */ /* * DASD_3990_ERP_EXAMINE_24 * * DESCRIPTION * Checks only for fatal (unrecoverable) error. * A detailed examination of the sense data is done later outside * the interrupt handler. * * Each bit configuration leading to an action code 2 (Exit with * programming error or unusual condition indication) * are handled as fatal error´s. * * All other configurations are handled as recoverable errors. * * RETURN VALUES * dasd_era_fatal for all fatal (unrecoverable errors) * dasd_era_recover for all others. */ dasd_era_t dasd_3990_erp_examine_24 (ccw_req_t *cqr, char *sense) { dasd_device_t *device = cqr->device; /* check for 'Command Reject' */ if (( sense[0] & SNS0_CMD_REJECT ) && (!(sense[2] & SNS2_ENV_DATA_PRESENT)) ) { DEV_MESSAGE (KERN_ERR, device, "%s", "EXAMINE 24: Command Reject detected - " "fatal error"); return dasd_era_fatal; } /* check for 'Invalid Track Format' */ if (( sense[1] & SNS1_INV_TRACK_FORMAT ) && (!(sense[2] & SNS2_ENV_DATA_PRESENT)) ) { DEV_MESSAGE (KERN_ERR, device, "%s", "EXAMINE 24: Invalid Track Format detected " "- fatal error"); return dasd_era_fatal; } /* check for 'No Record Found' */ if (sense[1] & SNS1_NO_REC_FOUND) { DEV_MESSAGE (KERN_ERR, device, "EXAMINE 24: No Record Found detected %s", cqr == device->init_cqr ? " " : "- fatal error"); return dasd_era_fatal; } /* return recoverable for all others */ return dasd_era_recover; } /* END dasd_3990_erp_examine_24 */ /* * DASD_3990_ERP_EXAMINE_32 * * DESCRIPTION * Checks only for fatal/no/recoverable error. * A detailed examination of the sense data is done later outside * the interrupt handler. * * RETURN VALUES * dasd_era_none no error * dasd_era_fatal for all fatal (unrecoverable errors) * dasd_era_recover for recoverable others. */ dasd_era_t dasd_3990_erp_examine_32 (ccw_req_t *cqr, char *sense) { dasd_device_t *device = cqr->device; switch (sense[25]) { case 0x00: return dasd_era_none; case 0x01: DEV_MESSAGE (KERN_ERR, device, "%s", "EXAMINE 32: fatal error"); return dasd_era_fatal; default: return dasd_era_recover; } } /* end dasd_3990_erp_examine_32 */ /* * DASD_3990_ERP_EXAMINE * * DESCRIPTION * Checks only for fatal/no/recover error. * A detailed examination of the sense data is done later outside * the interrupt handler. * * The logic is based on the 'IBM 3990 Storage Control Reference' manual * 'Chapter 7. Error Recovery Procedures'. * * RETURN VALUES * dasd_era_none no error * dasd_era_fatal for all fatal (unrecoverable errors) * dasd_era_recover for all others. */ dasd_era_t dasd_3990_erp_examine (ccw_req_t *cqr, devstat_t *stat) { char *sense = stat->ii.sense.data; dasd_era_t era = dasd_era_recover; dasd_device_t *device = cqr->device; /* check for successful execution first */ if (stat->cstat == 0x00 && stat->dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END) ) return dasd_era_none; /* distinguish between 24 and 32 byte sense data */ if (sense[27] & DASD_SENSE_BIT_0) { era = dasd_3990_erp_examine_24 (cqr, sense); } else { era = dasd_3990_erp_examine_32 (cqr, sense); } /* log the erp chain if fatal error occurred */ if ((era == dasd_era_fatal ) && (cqr != device->init_cqr) ){ log_erp_chain (cqr, 0, stat->cpa); } return era; } /* END dasd_3990_erp_examine */ /* ***************************************************************************** * SECTION ERP HANDLING ***************************************************************************** */ /* ***************************************************************************** * 24 and 32 byte sense ERP functions ***************************************************************************** */ /* * DASD_3990_ERP_CLEANUP * * DESCRIPTION * Removes the already build but not neccessary ERP request and sets * the status of the original cqr / erp to the given (final) status * * PARAMETER * erp request to be blocked * final_status either CQR_STATUS_DONE or CQR_STATUS_FAILED * * RETURN VALUES * cqr original cqr */ ccw_req_t * dasd_3990_erp_cleanup (ccw_req_t *erp, char final_status) { ccw_req_t *cqr = erp->refers; dasd_free_request (erp, erp->device); check_then_set (&cqr->status, CQR_STATUS_ERROR, final_status); return cqr; } /* end dasd_3990_erp_cleanup */ /* * DASD_3990_ERP_BLOCK_QUEUE * * DESCRIPTION * Block the given device request queue to prevent from further * processing until the started timer has expired or an related * interrupt was received. */ void dasd_3990_erp_block_queue (ccw_req_t *erp, unsigned long expires) { dasd_device_t *device = erp->device; DEV_MESSAGE (KERN_INFO, device, "blocking request queue for %is", (int) expires); device->stopped |= DASD_STOPPED_PENDING; check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_QUEUED); /* restart queue after some time */ if (!timer_pending(&device->blocking_timer)) { init_timer(&device->blocking_timer); device->blocking_timer.function = dasd_3990_erp_restart_queue; device->blocking_timer.data = (unsigned long) device; device->blocking_timer.expires = jiffies + (expires * HZ); add_timer(&device->blocking_timer); } else { mod_timer(&device->blocking_timer, jiffies + (expires * HZ)); } } /* end dasd_3990_erp_block_queue */ /* * DASD_3990_ERP_RESTART_QUEUE * * DESCRIPTION * Restarts request queue of current device. * This has to be done if either an related interrupt was received, or * the timer has expired. */ void dasd_3990_erp_restart_queue (unsigned long device_ptr) { dasd_device_t *device = (dasd_device_t *) device_ptr; unsigned long flags; /* get the needed locks to modify the request queue */ s390irq_spin_lock_irqsave (device->devinfo.irq, flags); /* 'restart' the device queue */ DEV_MESSAGE (KERN_INFO, device, "%s", "request queue restarted by MIH"); device->stopped &= ~DASD_STOPPED_PENDING; s390irq_spin_unlock_irqrestore (device->devinfo.irq, flags); dasd_schedule_bh (device); } /* end dasd_3990_erp_restart_queue */ /* * DASD_3990_ERP_INT_REQ * * DESCRIPTION * Handles 'Intervention Required' error. * This means either device offline or not installed. * * PARAMETER * erp current erp * RETURN VALUES * erp modified erp */ ccw_req_t * dasd_3990_erp_int_req (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_int_req) { erp->retries = 256; erp->function = dasd_3990_erp_int_req; } else { /* issue a message and wait for 'device ready' interrupt */ DEV_MESSAGE (KERN_ERR, device, "%s", "is offline or not installed - " "INTERVENTION REQUIRED!!"); dasd_3990_erp_block_queue (erp, 60); } return erp; } /* end dasd_3990_erp_int_req */ /* * DASD_3990_ERP_ALTERNATE_PATH * * DESCRIPTION * Repeat the operation on a different channel path. * If all alternate paths have been tried, the request is posted with a * permanent error. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp modified pointer to the ERP * */ void dasd_3990_erp_alternate_path (ccw_req_t *erp) { dasd_device_t *device = erp->device; int irq = device->devinfo.irq; /* try alternate valid path */ erp->lpm &= ~(erp->dstat->lpum); erp->options |= DOIO_VALID_LPM; /* use LPM for DO_IO */ if ((erp->lpm & ioinfo[irq]->opm) != 0x00) { DEV_MESSAGE (KERN_DEBUG, device, "try alternate lpm=%x (lpum=%x / opm=%x)", erp->lpm, erp->dstat->lpum, ioinfo[irq]->opm); /* reset status to queued to handle the request again... */ check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_QUEUED); erp->retries = 1; } else { DEV_MESSAGE (KERN_ERR, device, "No alternate channel path left (lpum=%x / " "opm=%x) -> permanent error", erp->dstat->lpum, ioinfo[irq]->opm); /* post request with permanent error */ check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_FAILED); } } /* end dasd_3990_erp_alternate_path */ /* * DASD_3990_ERP_DCTL * * DESCRIPTION * Setup cqr to do the Diagnostic Control (DCTL) command with an * Inhibit Write subcommand (0x20) and the given modifier. * * PARAMETER * erp pointer to the current (failed) ERP * modifier subcommand modifier * * RETURN VALUES * dctl_cqr pointer to NEW dctl_cqr * */ ccw_req_t * dasd_3990_erp_DCTL (ccw_req_t *erp, char modifier) { dasd_device_t *device = erp->device; DCTL_data_t *DCTL_data; ccw1_t *ccw; ccw_req_t *dctl_cqr = dasd_alloc_request ((char *) &erp->magic, 1, sizeof(DCTL_data_t), erp->device); if (!dctl_cqr) { DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate DCTL-CQR"); check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_FAILED); return erp; } DCTL_data = dctl_cqr->data; DCTL_data->subcommand = 0x02; /* Inhibit Write */ DCTL_data->modifier = modifier; ccw = dctl_cqr->cpaddr; memset (ccw, 0, sizeof (ccw1_t)); ccw->cmd_code = CCW_CMD_DCTL; ccw->count = 4; if (dasd_set_normalized_cda(ccw, __pa (DCTL_data), dctl_cqr, erp->device)) { dasd_free_request (dctl_cqr, erp->device); DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate DCTL-CQR"); check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_FAILED); return erp; } dctl_cqr->function = dasd_3990_erp_DCTL; dctl_cqr->refers = erp; dctl_cqr->device = erp->device; dctl_cqr->magic = erp->magic; dctl_cqr->lpm = LPM_ANYPATH; dctl_cqr->expires = 5 * TOD_MIN; dctl_cqr->retries = 2; dctl_cqr->buildclk = get_clock (); dctl_cqr->status = CQR_STATUS_FILLED; return dctl_cqr; } /* end dasd_3990_erp_DCTL */ /* * DASD_3990_ERP_ACTION_1 * * DESCRIPTION * Setup ERP to do the ERP action 1 (see Reference manual). * Repeat the operation on a different channel path. * If all alternate paths have been tried, the request is posted with a * permanent error. * Note: duplex handling is not implemented (yet). * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP * */ ccw_req_t * dasd_3990_erp_action_1 (ccw_req_t *erp) { 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 * */ ccw_req_t * dasd_3990_erp_action_4 (ccw_req_t *erp, char *sense) { dasd_device_t *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) { 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); } else { DEV_MESSAGE (KERN_INFO, device, "redriving request immediately, " "%d retries left", erp->retries); /* no state change pending - retry */ check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_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 * */ ccw_req_t * dasd_3990_erp_action_5 (ccw_req_t *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 */ void dasd_3990_handle_env_data (ccw_req_t *erp, char *sense) { dasd_device_t *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); } /* 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) { 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, 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 */ DEV_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) { 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 */ ccw_req_t * dasd_3990_erp_data_check (ccw_req_t *erp, char *sense) { dasd_device_t *device = erp->device; erp->function = dasd_3990_erp_data_check; if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ /* issue message that the data has been corrected */ DEV_MESSAGE (KERN_EMERG, device, "%s", "Data recovered during retry with PCI " "fetch mode active"); /* not possible to handle this situation in Linux */ panic("No way to inform appliction about the possibly " "incorret data"); } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { DEV_MESSAGE (KERN_DEBUG, device, "%s", "Uncorrectable data check recovered secondary " "addr of duplex pair"); erp = dasd_3990_erp_action_4 (erp, sense); } else if (sense[1] & SNS1_PERM_ERR) { DEV_MESSAGE (KERN_DEBUG, device, "%s", "Uncorrectable data check with internal " "retry exhausted"); erp = dasd_3990_erp_action_1 (erp); } else { /* all other data checks */ DEV_MESSAGE (KERN_DEBUG, device, "%s", "Uncorrectable data check with retry count " "exhausted..."); erp = dasd_3990_erp_action_5 (erp); } return erp; } /* end dasd_3990_erp_data_check */ /* * DASD_3990_ERP_OVERRUN * * DESCRIPTION * Handles 24 byte 'Overrun' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ ccw_req_t * dasd_3990_erp_overrun (ccw_req_t *erp, char *sense) { dasd_device_t *device = erp->device; erp->function = dasd_3990_erp_overrun; DEV_MESSAGE (KERN_DEBUG, device, "%s", "Overrun - service overrun or overrun" " error requested by channel"); erp = dasd_3990_erp_action_5 (erp); return erp; } /* end dasd_3990_erp_overrun */ /* * DASD_3990_ERP_INV_FORMAT * * DESCRIPTION * Handles 24 byte 'Invalid Track Format' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ ccw_req_t * dasd_3990_erp_inv_format (ccw_req_t *erp, char *sense) { dasd_device_t *device = erp->device; erp->function = dasd_3990_erp_inv_format; if (sense[2] & SNS2_ENV_DATA_PRESENT) { DEV_MESSAGE (KERN_DEBUG, device, "%s", "Track format error when destaging or " "staging data"); dasd_3990_handle_env_data (erp, sense); erp = dasd_3990_erp_action_4 (erp, sense); } else { DEV_MESSAGE (KERN_ERR, device, "%s", "Invalid Track Format - Fatal error should have " "been handled within the interrupt handler"); erp= dasd_3990_erp_cleanup (erp, CQR_STATUS_FAILED); } return erp; } /* end dasd_3990_erp_inv_format */ /* * DASD_3990_ERP_EOC * * DESCRIPTION * Handles 24 byte 'End-of-Cylinder' error. * * PARAMETER * erp already added default erp * RETURN VALUES * erp pointer to original (failed) cqr. */ ccw_req_t * dasd_3990_erp_EOC (ccw_req_t *default_erp, char *sense) { dasd_device_t *device = default_erp->device; DEV_MESSAGE (KERN_ERR, device, "%s", "End-of-Cylinder - must never happen"); /* implement action 7 - BUG */ return dasd_3990_erp_cleanup (default_erp, CQR_STATUS_FAILED); } /* end dasd_3990_erp_EOC */ /* * DASD_3990_ERP_ENV_DATA * * DESCRIPTION * Handles 24 byte 'Environmental-Data Present' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ ccw_req_t * dasd_3990_erp_env_data (ccw_req_t *erp, char *sense) { dasd_device_t *device = erp->device; erp->function = dasd_3990_erp_env_data; DEV_MESSAGE (KERN_DEBUG, device, "%s", "Environmental data present"); dasd_3990_handle_env_data (erp, sense); /* don't retry on disabled interface */ if (sense[7] != 0x0F) { erp = dasd_3990_erp_action_4 (erp, sense); } else { erp = dasd_3990_erp_cleanup (erp, CQR_STATUS_IN_IO); } return erp; } /* end dasd_3990_erp_env_data */ /* * DASD_3990_ERP_NO_REC * * DESCRIPTION * Handles 24 byte 'No Record Found' error. * * PARAMETER * erp already added default ERP * * RETURN VALUES * erp new erp_head - pointer to new ERP */ ccw_req_t * dasd_3990_erp_no_rec (ccw_req_t *default_erp, char *sense) { dasd_device_t *device = default_erp->device; DEV_MESSAGE (KERN_ERR, device, "%s", "No Record Found - Fatal error should " "have been handled within the interrupt handler"); return dasd_3990_erp_cleanup (default_erp, CQR_STATUS_FAILED); } /* end dasd_3990_erp_no_rec */ /* * DASD_3990_ERP_FILE_PROT * * DESCRIPTION * Handles 24 byte 'File Protected' error. * Note: Seek related recovery is not implemented because * wee don't use the seek command yet. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ ccw_req_t * dasd_3990_erp_file_prot (ccw_req_t *erp) { dasd_device_t *device = erp->device; DEV_MESSAGE (KERN_ERR, device, "%s", "File Protected"); return dasd_3990_erp_cleanup (erp, CQR_STATUS_FAILED); } /* end dasd_3990_erp_file_prot */ /* * DASD_3990_ERP_INSPECT_24 * * DESCRIPTION * Does a detailed inspection of the 24 byte sense data * and sets up a related error recovery action. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created default ERP * * RETURN VALUES * erp pointer to the (addtitional) ERP */ ccw_req_t * dasd_3990_erp_inspect_24 (ccw_req_t *erp, char *sense) { ccw_req_t *erp_filled = NULL; /* Check sense for .... */ /* 'Command Reject' */ if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { erp_filled = dasd_3990_erp_com_rej (erp, sense); } /* 'Intervention Required' */ if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { erp_filled = dasd_3990_erp_int_req (erp); } /* 'Bus Out Parity Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { erp_filled = dasd_3990_erp_bus_out (erp); } /* 'Equipment Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { erp_filled = dasd_3990_erp_equip_check (erp, sense); } /* 'Data Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { erp_filled = dasd_3990_erp_data_check (erp, sense); } /* 'Overrun' */ if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { erp_filled = dasd_3990_erp_overrun (erp, sense); } /* 'Invalid Track Format' */ if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { erp_filled = dasd_3990_erp_inv_format (erp, sense); } /* 'End-of-Cylinder' */ if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { erp_filled = dasd_3990_erp_EOC (erp, sense); } /* 'Environmental Data' */ if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { erp_filled = dasd_3990_erp_env_data (erp, sense); } /* 'No Record Found' */ if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { erp_filled = dasd_3990_erp_no_rec (erp, sense); } /* 'File Protected' */ if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { erp_filled = dasd_3990_erp_file_prot (erp); } /* other (unknown) error - do default ERP */ if (erp_filled == NULL) { erp_filled = erp; } return erp_filled; } /* END dasd_3990_erp_inspect_24 */ /* ***************************************************************************** * 32 byte sense ERP functions (only) ***************************************************************************** */ /* * DASD_3990_ERPACTION_10_32 * * DESCRIPTION * Handles 32 byte 'Action 10' of Single Program Action Codes. * Just retry and if retry doesn't work, return with error. * * PARAMETER * erp current erp_head * sense current sense data * RETURN VALUES * erp modified erp_head */ ccw_req_t * dasd_3990_erp_action_10_32 (ccw_req_t *erp, char *sense) { dasd_device_t *device = erp->device; erp->retries = 256; erp->function = dasd_3990_erp_action_10_32; DEV_MESSAGE (KERN_DEBUG, device, "%s", "Perform logging requested"); return erp; } /* end dasd_3990_erp_action_10_32 */ /* * DASD_3990_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 */ ccw_req_t * dasd_3990_erp_action_1B_32 (ccw_req_t *default_erp, char *sense) { dasd_device_t *device = default_erp->device; __u32 cpa = 0; ccw_req_t *cqr; ccw_req_t *erp; DE_eckd_data_t *DE_data; char *LO_data; /* LO_eckd_data_t */ ccw1_t *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->dstat->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, CQR_STATUS_FAILED); } /* Build new ERP request including DE/LO */ erp = dasd_alloc_request ((char *) &cqr->magic, 2 + 1, /* DE/LO + TIC */ sizeof (DE_eckd_data_t) + sizeof (LO_eckd_data_t), device); if (!erp) { DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate ERP"); return dasd_3990_erp_cleanup (default_erp, CQR_STATUS_FAILED); } /* use original DE */ DE_data = erp->data; memcpy (DE_data, cqr->data, sizeof (DE_eckd_data_t)); /* create LO */ LO_data = erp->data + sizeof (DE_eckd_data_t); 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, CQR_STATUS_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 (ccw1_t)); ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; ccw->flags = CCW_FLAG_CC; ccw->count = 16; if (dasd_set_normalized_cda (ccw, __pa (DE_data), erp, device)) { dasd_free_request (erp, device); DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate ERP"); return dasd_3990_erp_cleanup (default_erp, CQR_STATUS_FAILED); } /* create LO ccw */ ccw++; memset (ccw, 0, sizeof (ccw1_t)); ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; ccw->flags = CCW_FLAG_CC; ccw->count = 16; if (dasd_set_normalized_cda (ccw, __pa (LO_data), erp, device)){ dasd_free_request (erp, device); DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate ERP"); return dasd_3990_erp_cleanup (default_erp, CQR_STATUS_FAILED); } /* 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->lpm = 0xFF; erp->expires = 0; erp->retries = 256; erp->status = CQR_STATUS_FILLED; /* remove the default erp */ dasd_free_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 */ ccw_req_t * dasd_3990_update_1B (ccw_req_t *previous_erp, char *sense) { dasd_device_t *device = previous_erp->device; __u32 cpa = 0; ccw_req_t *cqr; ccw_req_t *erp; char *LO_data; /* LO_eckd_data_t */ ccw1_t *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"); check_then_set (&previous_erp->status, CQR_STATUS_ERROR, CQR_STATUS_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->dstat->cpa; if (cpa == 0) { DEV_MESSAGE (KERN_DEBUG, device, "%s", "Unable to determine address of the CCW " "to be restarted"); check_then_set (&previous_erp->status, CQR_STATUS_ERROR, CQR_STATUS_FAILED); return previous_erp; } erp = previous_erp; /* update the LO with the new returned sense data */ LO_data = erp->data + sizeof (DE_eckd_data_t); if ((sense[3] == 0x01) && (LO_data[1] & 0x01) ){ DEV_MESSAGE (KERN_ERR, device, "%s", "BUG - this should not happen"); check_then_set (&previous_erp->status, CQR_STATUS_ERROR, CQR_STATUS_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; check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_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 * */ void dasd_3990_erp_compound_retry (ccw_req_t *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 * */ void dasd_3990_erp_compound_path (ccw_req_t *erp, char *sense) { if (sense[25] & DASD_SENSE_BIT_3) { dasd_3990_erp_alternate_path (erp); if (erp->status == CQR_STATUS_FAILED) { /* reset the lpm and the status to be able to * try further actions. */ erp->lpm = LPM_ANYPATH; check_then_set (&erp->status, CQR_STATUS_FAILED, CQR_STATUS_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 * */ ccw_req_t * dasd_3990_erp_compound_code (ccw_req_t *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); break; default: ; /* should not happen - continue */ } } 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 * */ void dasd_3990_erp_compound_config (ccw_req_t *erp, char *sense) { if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2) ) { /* set to suspended duplex state then restart */ dasd_device_t *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 * */ ccw_req_t * dasd_3990_erp_compound (ccw_req_t *erp, char *sense) { if ((erp->function == dasd_3990_erp_compound_retry) && (erp->status == CQR_STATUS_ERROR ) ) { dasd_3990_erp_compound_path (erp, sense); } if ((erp->function == dasd_3990_erp_compound_path) && (erp->status == CQR_STATUS_ERROR ) ){ erp = dasd_3990_erp_compound_code (erp, sense); } if ((erp->function == dasd_3990_erp_compound_code) && (erp->status == CQR_STATUS_ERROR ) ) { dasd_3990_erp_compound_config (erp, sense); } /* if no compound action ERP specified, the request failed */ if (erp->status == CQR_STATUS_ERROR) { check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_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 * */ ccw_req_t * dasd_3990_erp_inspect_32 ( ccw_req_t *erp, char *sense ) { dasd_device_t *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 */ DEV_MESSAGE (KERN_DEBUG, device, "ERP called for successful request %p" " - NO ERP necessary", erp); erp = dasd_3990_erp_cleanup (erp, CQR_STATUS_DONE); 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, CQR_STATUS_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, CQR_STATUS_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, CQR_STATUS_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 appliction about " "the possibly incorret 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; default: ; /* all others errors - default erp */ } } 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 */ ccw_req_t * dasd_3990_erp_inspect (ccw_req_t *erp) { ccw_req_t *erp_new = NULL; /* sense data are located in the refers record of the */ /* already set up new ERP ! */ char *sense = erp->refers->dstat->ii.sense.data; /* 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; } /* END dasd_3990_erp_inspect */ /* * 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 */ ccw_req_t * dasd_3990_erp_add_erp (ccw_req_t *cqr) { dasd_device_t *device = cqr->device; ccw1_t *ccw; /* allocate additional request block */ ccw_req_t *erp = dasd_alloc_request ((char *) &cqr->magic, 2, 0, cqr->device); if (!erp) { if (cqr->retries <= 0) { DEV_MESSAGE (KERN_ERR, device, "%s", "Unable to allocate ERP request (NO retries left)"); check_then_set (&cqr->status, CQR_STATUS_ERROR, CQR_STATUS_FAILED); cqr->stopclk = get_clock (); } else { DEV_MESSAGE (KERN_ERR, device, "Unable to allocate ERP request (%i retries left)", cqr->retries); if (!timer_pending(&device->timer)) { init_timer (&device->timer); device->timer.function = dasd_schedule_bh_timed; device->timer.data = (unsigned long) device; device->timer.expires = jiffies + (HZ << 3); add_timer (&device->timer); } else { mod_timer(&device->timer, jiffies + (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->lpm = 0xFF; erp->expires = 0; erp->retries = 256; erp->status = CQR_STATUS_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 */ ccw_req_t * dasd_3990_erp_additional_erp (ccw_req_t *cqr) { ccw_req_t *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. */ int dasd_3990_erp_error_match (ccw_req_t *cqr1, ccw_req_t *cqr2) { /* check failed CCW */ if (cqr1->dstat->cpa != cqr2->dstat->cpa) { // return 0; /* CCW doesn't match */ } /* check sense data; byte 0-2,25,27 */ if (!((memcmp (cqr1->dstat->ii.sense.data, cqr2->dstat->ii.sense.data, 3) == 0) && (cqr1->dstat->ii.sense.data[27] == cqr2->dstat->ii.sense.data[27] ) && (cqr1->dstat->ii.sense.data[25] == cqr2->dstat->ii.sense.data[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. */ ccw_req_t * dasd_3990_erp_in_erp (ccw_req_t *cqr) { ccw_req_t *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 wiht no retry left * * RETURN VALUES * erp modified/additional ERP */ ccw_req_t * dasd_3990_erp_further_erp (ccw_req_t *erp) { dasd_device_t *device = erp->device; char *sense = erp->dstat->ii.sense.data; /* 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); check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_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 */ ccw_req_t * dasd_3990_erp_handle_match_erp (ccw_req_t *erp_head, ccw_req_t *erp) { dasd_device_t *device = erp_head->device; ccw_req_t *erp_done = erp_head; /* finished req */ ccw_req_t *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 */ dasd_chanq_deq (&device->queue, erp_done); erp_free = erp_done; erp_done = erp_done->refers; /* free the finished erp request */ dasd_free_request (erp_free, erp_free->device); } /* end while */ if (erp->retries > 0) { char *sense = erp->refers->dstat->ii.sense.data; /* 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... */ check_then_set (&erp->status, CQR_STATUS_ERROR, CQR_STATUS_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) */ ccw_req_t * dasd_3990_erp_action (ccw_req_t *cqr) { ccw_req_t *erp = NULL; dasd_device_t *device = cqr->device; __u32 cpa = cqr->dstat->cpa; #ifdef ERP_DEBUG /* print current erp_chain */ DEV_MESSAGE (KERN_DEBUG, device, "%s", "ERP chain at BEGINNING of ERP-ACTION"); { ccw_req_t *temp_erp = NULL; for (temp_erp = cqr; temp_erp != NULL; temp_erp = temp_erp->refers){ DEV_MESSAGE (KERN_DEBUG, device, " erp %p refers to %p", temp_erp, temp_erp->refers); } } #endif /* ERP_DEBUG */ /* double-check if current erp/cqr was successfull */ if ((cqr->dstat->cstat == 0x00 ) && (cqr->dstat->dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) ) { DEV_MESSAGE (KERN_DEBUG, device, "ERP called for successful request %p" " - NO ERP necessary", cqr); check_then_set (&cqr->status, CQR_STATUS_ERROR, CQR_STATUS_DONE); return cqr; } /* check if sense data are available */ if (!cqr->dstat->ii.sense.data) { DEV_MESSAGE (KERN_DEBUG, device, "ERP called witout sense data avail ..." "request %p - NO ERP possible", cqr); check_then_set (&cqr->status, CQR_STATUS_ERROR, CQR_STATUS_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_DEBUG, device, "%s", "ERP chain at END of ERP-ACTION"); { ccw_req_t *temp_erp = NULL; for (temp_erp = erp; temp_erp != NULL; temp_erp = temp_erp->refers) { DEV_MESSAGE (KERN_DEBUG, device, " erp %p refers to %p", temp_erp, temp_erp->refers); } } #endif /* ERP_DEBUG */ if (erp->status == CQR_STATUS_FAILED) { log_erp_chain (erp, 1, cpa); } /* enqueue added ERP request */ if ((erp != device->queue.head ) && (erp->status == CQR_STATUS_FILLED) ){ dasd_chanq_enq_head (&device->queue, erp); } else { if ((erp->status == CQR_STATUS_FILLED ) || (erp != device->queue.head)) { /* something strange happened - log the error and panic */ /* print current erp_chain */ DEV_MESSAGE (KERN_DEBUG, device, "%s", "ERP chain at END of ERP-ACTION"); { ccw_req_t *temp_erp = NULL; for (temp_erp = erp; temp_erp != NULL; temp_erp = temp_erp->refers) { DEV_MESSAGE (KERN_DEBUG, device, " erp %p (function %p)" " refers to %p", temp_erp, temp_erp->function, temp_erp->refers); } } panic ("Problems with ERP chain!!! Please report to linux390@de.ibm.com"); } } 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: nil * tab-width: 8 * End: */