| /* |
| * 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 |
| * |
| */ |
| |
| #include <linux/timer.h> |
| #include <linux/slab.h> |
| #include <asm/idals.h> |
| #include <asm/todclk.h> |
| |
| #define PRINTK_HEADER "dasd_erp(3990): " |
| |
| #include "dasd_int.h" |
| #include "dasd_eckd.h" |
| |
| |
| struct DCTL_data { |
| unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ |
| unsigned char modifier; /* Subcommand modifier */ |
| unsigned short res; /* reserved */ |
| } __attribute__ ((packed)); |
| |
| /* |
| ***************************************************************************** |
| * 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 errorĀ“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. |
| */ |
| static dasd_era_t |
| dasd_3990_erp_examine_24(struct dasd_ccw_req * cqr, char *sense) |
| { |
| |
| struct dasd_device *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) { |
| |
| /* FIXME: fatal error ?!? */ |
| DEV_MESSAGE(KERN_ERR, device, |
| "EXAMINE 24: No Record Found detected %s", |
| device->state <= DASD_STATE_BASIC ? |
| " " : "- 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. |
| */ |
| static dasd_era_t |
| dasd_3990_erp_examine_32(struct dasd_ccw_req * cqr, char *sense) |
| { |
| |
| struct dasd_device *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(struct dasd_ccw_req * cqr, struct irb * irb) |
| { |
| |
| char *sense = irb->ecw; |
| dasd_era_t era = dasd_era_recover; |
| struct dasd_device *device = cqr->device; |
| |
| /* check for successful execution first */ |
| if (irb->scsw.cstat == 0x00 && |
| irb->scsw.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) && (device->state >= DASD_STATE_READY)) { |
| dasd_log_sense(cqr, irb); |
| dasd_log_ccw(cqr, 0, irb->scsw.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 necessary 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 DASD_CQR_DONE or DASD_CQR_FAILED |
| * |
| * RETURN VALUES |
| * cqr original cqr |
| */ |
| static struct dasd_ccw_req * |
| dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) |
| { |
| struct dasd_ccw_req *cqr = erp->refers; |
| |
| dasd_free_erp_request(erp, erp->device); |
| cqr->status = 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. |
| */ |
| static void |
| dasd_3990_erp_block_queue(struct dasd_ccw_req * erp, int expires) |
| { |
| |
| struct dasd_device *device = erp->device; |
| |
| DEV_MESSAGE(KERN_INFO, device, |
| "blocking request queue for %is", expires/HZ); |
| |
| device->stopped |= DASD_STOPPED_PENDING; |
| erp->status = DASD_CQR_QUEUED; |
| |
| dasd_set_timer(device, expires); |
| } |
| |
| /* |
| * 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 |
| */ |
| static struct dasd_ccw_req * |
| dasd_3990_erp_int_req(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_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*HZ); |
| } |
| |
| 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 |
| */ |
| static void |
| dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) |
| { |
| struct dasd_device *device = erp->device; |
| __u8 opm; |
| |
| /* try alternate valid path */ |
| opm = ccw_device_get_path_mask(device->cdev); |
| //FIXME: start with get_opm ? |
| if (erp->lpm == 0) |
| erp->lpm = LPM_ANYPATH & ~(erp->irb.esw.esw0.sublog.lpum); |
| else |
| erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); |
| |
| if ((erp->lpm & opm) != 0x00) { |
| |
| DEV_MESSAGE(KERN_DEBUG, device, |
| "try alternate lpm=%x (lpum=%x / opm=%x)", |
| erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); |
| |
| /* reset status to queued to handle the request again... */ |
| if (erp->status > DASD_CQR_QUEUED) |
| erp->status = DASD_CQR_QUEUED; |
| erp->retries = 1; |
| } else { |
| DEV_MESSAGE(KERN_ERR, device, |
| "No alternate channel path left (lpum=%x / " |
| "opm=%x) -> permanent error", |
| erp->irb.esw.esw0.sublog.lpum, opm); |
| |
| /* post request with permanent error */ |
| if (erp->status > DASD_CQR_QUEUED) |
| erp->status = DASD_CQR_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 |
| * |
| */ |
| static struct dasd_ccw_req * |
| dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) |
| { |
| |
| struct dasd_device *device = erp->device; |
| struct DCTL_data *DCTL_data; |
| struct ccw1 *ccw; |
| struct dasd_ccw_req *dctl_cqr; |
| |
| dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, |
| sizeof (struct DCTL_data), |
| erp->device); |
| if (IS_ERR(dctl_cqr)) { |
| DEV_MESSAGE(KERN_ERR, device, "%s", |
| "Unable to allocate DCTL-CQR"); |
| erp->status = DASD_CQR_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 (struct ccw1)); |
| ccw->cmd_code = CCW_CMD_DCTL; |
| ccw->count = 4; |
| ccw->cda = (__u32)(addr_t) DCTL_data; |
| dctl_cqr->function = dasd_3990_erp_DCTL; |
| dctl_cqr->refers = erp; |
| dctl_cqr->device = erp->device; |
| dctl_cqr->magic = erp->magic; |
| dctl_cqr->expires = 5 * 60 * HZ; |
| dctl_cqr->retries = 2; |
| |
| dctl_cqr->buildclk = get_clock(); |
| |
| dctl_cqr->status = DASD_CQR_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 |
| * |
| */ |
| static struct dasd_ccw_req * |
| dasd_3990_erp_action_1(struct dasd_ccw_req * 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 |
| * |
| */ |
| 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"); |
| /* call extended error reporting (EER) */ |
| dasd_eer_write(device, erp->refers, |
| DASD_EER_PPRCSUSPEND); |
| 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; |
| struct dasd_ccw_req *temp_erp = NULL; |
| |
| if (device->features & DASD_FEATURE_ERPLOG) { |
| /* print current erp_chain */ |
| DEV_MESSAGE(KERN_ERR, device, "%s", |
| "ERP chain at BEGINNING of ERP-ACTION"); |
| 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); |
| } |
| } |
| |
| /* 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); |
| } |
| |
| if (device->features & DASD_FEATURE_ERPLOG) { |
| /* print current erp_chain */ |
| DEV_MESSAGE(KERN_ERR, device, "%s", |
| "ERP chain at END of ERP-ACTION"); |
| 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); |
| } |
| } |
| |
| 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 */ |