| /* |
| * 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 |
| * |
| */ |
| |
| #define KMSG_COMPONENT "dasd-eckd" |
| |
| #include <linux/timer.h> |
| #include <asm/idals.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 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->memdev); |
| 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->startdev; |
| unsigned long flags; |
| |
| DBF_DEV_EVENT(DBF_INFO, device, |
| "blocking request queue for %is", expires/HZ); |
| |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| erp->status = DASD_CQR_FILLED; |
| if (erp->block) |
| dasd_block_set_timer(erp->block, expires); |
| else |
| dasd_device_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->startdev; |
| |
| /* 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_err(&device->cdev->dev, |
| "is offline or not installed - " |
| "INTERVENTION REQUIRED!!\n"); |
| |
| 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->startdev; |
| __u8 opm; |
| unsigned long flags; |
| |
| /* try alternate valid path */ |
| spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
| opm = ccw_device_get_path_mask(device->cdev); |
| spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
| if (erp->lpm == 0) |
| erp->lpm = device->path_data.opm & |
| ~(erp->irb.esw.esw0.sublog.lpum); |
| else |
| erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); |
| |
| if ((erp->lpm & opm) != 0x00) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, device, |
| "try alternate lpm=%x (lpum=%x / opm=%x)", |
| erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); |
| |
| /* reset status to submit the request again... */ |
| erp->status = DASD_CQR_FILLED; |
| erp->retries = 10; |
| } else { |
| dev_err(&device->cdev->dev, |
| "The DASD cannot be reached on any path (lpum=%x" |
| "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); |
| |
| /* post request with permanent error */ |
| 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->startdev; |
| 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), |
| device); |
| if (IS_ERR(dctl_cqr)) { |
| dev_err(&device->cdev->dev, |
| "Unable to allocate DCTL-CQR\n"); |
| 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->flags = erp->flags; |
| dctl_cqr->function = dasd_3990_erp_DCTL; |
| dctl_cqr->refers = erp; |
| dctl_cqr->startdev = device; |
| dctl_cqr->memdev = 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. |
| * As deviation from the recommended recovery action, we reset the path mask |
| * after we have tried each path and go through all paths a second time. |
| * This will cover situations where only one path at a time is actually down, |
| * but all paths fail and recover just with the same sequence and timing as |
| * we try to use them (flapping links). |
| * If all alternate paths have been tried twice, the request is posted with |
| * a permanent error. |
| * |
| * PARAMETER |
| * erp pointer to the current ERP |
| * |
| * RETURN VALUES |
| * erp pointer to the ERP |
| * |
| */ |
| static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) |
| { |
| erp->function = dasd_3990_erp_action_1_sec; |
| dasd_3990_erp_alternate_path(erp); |
| return 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); |
| if (erp->status == DASD_CQR_FAILED && |
| !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { |
| erp->status = DASD_CQR_FILLED; |
| erp->retries = 10; |
| erp->lpm = erp->startdev->path_data.opm; |
| erp->function = dasd_3990_erp_action_1_sec; |
| } |
| return erp; |
| } /* end dasd_3990_erp_action_1(b) */ |
| |
| /* |
| * 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->startdev; |
| |
| /* 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) { |
| |
| DBF_DEV_EVENT(DBF_INFO, device, "%s", |
| "dasd_3990_erp_action_4: first time retry"); |
| |
| erp->retries = 256; |
| erp->function = dasd_3990_erp_action_4; |
| |
| } else { |
| if (sense && (sense[25] == 0x1D)) { /* state change pending */ |
| |
| DBF_DEV_EVENT(DBF_INFO, device, |
| "waiting for state change pending " |
| "interrupt, %d retries left", |
| erp->retries); |
| |
| dasd_3990_erp_block_queue(erp, 30*HZ); |
| |
| } else if (sense && (sense[25] == 0x1E)) { /* busy */ |
| DBF_DEV_EVENT(DBF_INFO, device, |
| "busy - redriving request later, " |
| "%d retries left", |
| erp->retries); |
| dasd_3990_erp_block_queue(erp, HZ); |
| } else { |
| /* no state change pending - retry */ |
| DBF_DEV_EVENT(DBF_INFO, device, |
| "redriving request immediately, " |
| "%d retries left", |
| erp->retries); |
| erp->status = DASD_CQR_FILLED; |
| } |
| } |
| |
| 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->startdev; |
| char msg_format = (sense[7] & 0xF0); |
| char msg_no = (sense[7] & 0x0F); |
| char errorstring[ERRORLENGTH]; |
| |
| 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_warn(&device->cdev->dev, |
| "FORMAT 0 - Invalid Command\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Invalid Command " |
| "Sequence\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - CCW Count less than " |
| "required\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Invalid Parameter\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Diagnostic of Special" |
| " Command Violates File Mask\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Channel Returned with " |
| "Incorrect retry CCW\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Reset Notification\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Storage Path Restart\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Channel requested " |
| "... %02x\n", sense[8]); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Invalid Defective/" |
| "Alternate Track Pointer\n"); |
| break; |
| case 0x0C: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - DPS Installation " |
| "Check\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Command Invalid on " |
| "Secondary Address\n"); |
| break; |
| case 0x0F: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Status Not As " |
| "Required: reason %02x\n", |
| sense[8]); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Reserved\n"); |
| } |
| } else { |
| switch (msg_no) { |
| case 0x00: /* No Message */ |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Device Error " |
| "Source\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Reserved\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Device Fenced - " |
| "device = %02x\n", sense[4]); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Data Pinned for " |
| "Device\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 0 - Reserved\n"); |
| } |
| } |
| break; |
| |
| case 0x10: /* Format 1 - Device Equipment Checks */ |
| switch (msg_no) { |
| case 0x00: /* No Message */ |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Device Status 1 not as " |
| "expected\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Index missing\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Interruption cannot be " |
| "reset\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Device did not respond to " |
| "selection\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Device check-2 error or Set " |
| "Sector is not complete\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Head address does not " |
| "compare\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Device status 1 not valid\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Device not ready\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Track physical address did " |
| "not compare\n"); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Missing device address bit\n"); |
| break; |
| case 0x0C: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Drive motor switch is off\n"); |
| break; |
| case 0x0D: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Seek incomplete\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Cylinder address did not " |
| "compare\n"); |
| break; |
| case 0x0F: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Offset active cannot be " |
| "reset\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 1 - Reserved\n"); |
| } |
| break; |
| |
| case 0x20: /* Format 2 - 3990 Equipment Checks */ |
| switch (msg_no) { |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 2 - 3990 check-2 error\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 2 - Support facility errors\n"); |
| break; |
| case 0x0F: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 2 - Microcode detected error " |
| "%02x\n", |
| sense[8]); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 2 - Reserved\n"); |
| } |
| break; |
| |
| case 0x30: /* Format 3 - 3990 Control Checks */ |
| switch (msg_no) { |
| case 0x0F: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 3 - Allegiance terminated\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 3 - Reserved\n"); |
| } |
| break; |
| |
| case 0x40: /* Format 4 - Data Checks */ |
| switch (msg_no) { |
| case 0x00: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Home address area error\n"); |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Count area error\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Key area error\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Data area error\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in home address " |
| "area\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in count address " |
| "area\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in key area\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in data area\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Home address area error; " |
| "offset active\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Count area error; offset " |
| "active\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Key area error; offset " |
| "active\n"); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Data area error; " |
| "offset active\n"); |
| break; |
| case 0x0C: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in home " |
| "address area; offset active\n"); |
| break; |
| case 0x0D: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No syn byte in count " |
| "address area; offset active\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No sync byte in key area; " |
| "offset active\n"); |
| break; |
| case 0x0F: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - No syn byte in data area; " |
| "offset active\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 4 - Reserved\n"); |
| } |
| break; |
| |
| case 0x50: /* Format 5 - Data Check with displacement information */ |
| switch (msg_no) { |
| case 0x00: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the " |
| "home address area\n"); |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the count " |
| "area\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the key area\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the data " |
| "area\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the " |
| "home address area; offset active\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the count area; " |
| "offset active\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the key area; " |
| "offset active\n"); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Data Check in the data area; " |
| "offset active\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 5 - Reserved\n"); |
| } |
| break; |
| |
| case 0x60: /* Format 6 - Usage Statistics/Overrun Errors */ |
| switch (msg_no) { |
| case 0x00: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel A\n"); |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel B\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel C\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel D\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel E\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel F\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel G\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Overrun on channel H\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 6 - Reserved\n"); |
| } |
| break; |
| |
| case 0x70: /* Format 7 - Device Connection Control Checks */ |
| switch (msg_no) { |
| case 0x00: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - RCC initiated by a connection " |
| "check alert\n"); |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - RCC 1 sequence not " |
| "successful\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - RCC 1 and RCC 2 sequences not " |
| "successful\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Invalid tag-in during " |
| "selection sequence\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - extra RCC required\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Invalid DCC selection " |
| "response or timeout\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Missing end operation; device " |
| "transfer complete\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Missing end operation; device " |
| "transfer incomplete\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Invalid tag-in for an " |
| "immediate command sequence\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Invalid tag-in for an " |
| "extended command sequence\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - 3990 microcode time out when " |
| "stopping selection\n"); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - No response to selection " |
| "after a poll interruption\n"); |
| break; |
| case 0x0C: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Permanent path error (DASD " |
| "controller not available)\n"); |
| break; |
| case 0x0D: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - DASD controller not available" |
| " on disconnected command chain\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 7 - Reserved\n"); |
| } |
| break; |
| |
| case 0x80: /* Format 8 - Additional Device Equipment Checks */ |
| switch (msg_no) { |
| case 0x00: /* No Message */ |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - Error correction code " |
| "hardware fault\n"); |
| break; |
| case 0x03: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - Unexpected end operation " |
| "response code\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - End operation with transfer " |
| "count not zero\n"); |
| break; |
| case 0x05: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - End operation with transfer " |
| "count zero\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - DPS checks after a system " |
| "reset or selective reset\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - DPS cannot be filled\n"); |
| break; |
| case 0x08: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - Short busy time-out during " |
| "device selection\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - DASD controller failed to " |
| "set or reset the long busy latch\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - No interruption from device " |
| "during a command chain\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 8 - Reserved\n"); |
| } |
| break; |
| |
| case 0x90: /* Format 9 - Device Read, Write, and Seek Checks */ |
| switch (msg_no) { |
| case 0x00: |
| break; /* No Message */ |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 9 - Device check-2 error\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 9 - Head address did not " |
| "compare\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 9 - Track physical address did " |
| "not compare while oriented\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 9 - Cylinder address did not " |
| "compare\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT 9 - Reserved\n"); |
| } |
| break; |
| |
| case 0xF0: /* Format F - Cache Storage Checks */ |
| switch (msg_no) { |
| case 0x00: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Operation Terminated\n"); |
| break; |
| case 0x01: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Subsystem Processing Error\n"); |
| break; |
| case 0x02: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Cache or nonvolatile storage " |
| "equipment failure\n"); |
| break; |
| case 0x04: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Caching terminated\n"); |
| break; |
| case 0x06: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Cache fast write access not " |
| "authorized\n"); |
| break; |
| case 0x07: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Track format incorrect\n"); |
| break; |
| case 0x09: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Caching reinitiated\n"); |
| break; |
| case 0x0A: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Nonvolatile storage " |
| "terminated\n"); |
| break; |
| case 0x0B: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Volume is suspended duplex\n"); |
| /* call extended error reporting (EER) */ |
| dasd_eer_write(device, erp->refers, |
| DASD_EER_PPRCSUSPEND); |
| break; |
| case 0x0C: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Subsystem status cannot be " |
| "determined\n"); |
| break; |
| case 0x0D: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - Caching status reset to " |
| "default\n"); |
| break; |
| case 0x0E: |
| dev_warn(&device->cdev->dev, |
| "FORMAT F - DASD Fast Write inhibited\n"); |
| break; |
| default: |
| dev_warn(&device->cdev->dev, |
| "FORMAT D - Reserved\n"); |
| } |
| break; |
| |
| default: /* unknown message format - should not happen |
| internal error 03 - unknown message format */ |
| snprintf(errorstring, ERRORLENGTH, "03 %x02", msg_format); |
| dev_err(&device->cdev->dev, |
| "An error occurred in the DASD device driver, " |
| "reason=%s\n", errorstring); |
| 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->startdev; |
| |
| erp->function = dasd_3990_erp_com_rej; |
| |
| /* env data present (ACTION 10 - retry should work) */ |
| if (sense[2] & SNS2_ENV_DATA_PRESENT) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Command Reject - environmental data present"); |
| |
| dasd_3990_handle_env_data(erp, sense); |
| |
| erp->retries = 5; |
| |
| } else if (sense[1] & SNS1_WRITE_INHIBITED) { |
| dev_err(&device->cdev->dev, "An I/O request was rejected" |
| " because writing is inhibited\n"); |
| erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); |
| } else { |
| /* fatal error - set status to FAILED |
| internal error 09 - Command Reject */ |
| dev_err(&device->cdev->dev, "An error occurred in the DASD " |
| "device driver, reason=%s\n", "09"); |
| |
| 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->startdev; |
| |
| /* 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 */ |
| DBF_DEV_EVENT(DBF_WARNING, 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->startdev; |
| |
| erp->function = dasd_3990_erp_equip_check; |
| |
| if (sense[1] & SNS1_WRITE_INHIBITED) { |
| dev_info(&device->cdev->dev, |
| "Write inhibited path encountered\n"); |
| |
| /* vary path offline |
| internal error 04 - Path should be varied off-line.*/ |
| dev_err(&device->cdev->dev, "An error occurred in the DASD " |
| "device driver, reason=%s\n", "04"); |
| |
| erp = dasd_3990_erp_action_1(erp); |
| |
| } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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 */ |
| DBF_DEV_EVENT(DBF_WARNING, 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->startdev; |
| |
| erp->function = dasd_3990_erp_data_check; |
| |
| if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ |
| |
| /* issue message that the data has been corrected */ |
| dev_emerg(&device->cdev->dev, |
| "Data recovered during retry with PCI " |
| "fetch mode active\n"); |
| |
| /* 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) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Uncorrectable data check with internal " |
| "retry exhausted"); |
| |
| erp = dasd_3990_erp_action_1(erp); |
| |
| } else { |
| /* all other data checks */ |
| DBF_DEV_EVENT(DBF_WARNING, 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->startdev; |
| |
| erp->function = dasd_3990_erp_overrun; |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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->startdev; |
| |
| erp->function = dasd_3990_erp_inv_format; |
| |
| if (sense[2] & SNS2_ENV_DATA_PRESENT) { |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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 { |
| /* internal error 06 - The track format is not valid*/ |
| dev_err(&device->cdev->dev, |
| "An error occurred in the DASD device driver, " |
| "reason=%s\n", "06"); |
| |
| 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->startdev; |
| |
| dev_err(&device->cdev->dev, |
| "The cylinder data for accessing the DASD is inconsistent\n"); |
| |
| /* 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->startdev; |
| |
| erp->function = dasd_3990_erp_env_data; |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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->status = DASD_CQR_FILLED; |
| } |
| |
| 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->startdev; |
| |
| dev_err(&device->cdev->dev, |
| "The specified record was not found\n"); |
| |
| 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->startdev; |
| |
| dev_err(&device->cdev->dev, "Accessing the DASD failed because of " |
| "a hardware error\n"); |
| |
| return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); |
| |
| } /* end dasd_3990_erp_file_prot */ |
| |
| /* |
| * DASD_3990_ERP_INSPECT_ALIAS |
| * |
| * DESCRIPTION |
| * Checks if the original request was started on an alias device. |
| * If yes, it modifies the original and the erp request so that |
| * the erp request can be started on a base device. |
| * |
| * PARAMETER |
| * erp pointer to the currently created default ERP |
| * |
| * RETURN VALUES |
| * erp pointer to the modified ERP, or NULL |
| */ |
| |
| static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( |
| struct dasd_ccw_req *erp) |
| { |
| struct dasd_ccw_req *cqr = erp->refers; |
| char *sense; |
| |
| if (cqr->block && |
| (cqr->block->base != cqr->startdev)) { |
| |
| sense = dasd_get_sense(&erp->refers->irb); |
| /* |
| * dynamic pav may have changed base alias mapping |
| */ |
| if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense |
| && (sense[0] == 0x10) && (sense[7] == 0x0F) |
| && (sense[8] == 0x67)) { |
| /* |
| * remove device from alias handling to prevent new |
| * requests from being scheduled on the |
| * wrong alias device |
| */ |
| dasd_alias_remove_device(cqr->startdev); |
| |
| /* schedule worker to reload device */ |
| dasd_reload_device(cqr->startdev); |
| } |
| |
| if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { |
| DBF_DEV_EVENT(DBF_ERR, cqr->startdev, |
| "ERP on alias device for request %p," |
| " recover on base device %s", cqr, |
| dev_name(&cqr->block->base->cdev->dev)); |
| } |
| dasd_eckd_reset_ccw_to_base_io(cqr); |
| erp->startdev = cqr->block->base; |
| erp->function = dasd_3990_erp_inspect_alias; |
| return erp; |
| } else |
| return NULL; |
| } |
| |
| |
| /* |
| * 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->startdev; |
| |
| erp->retries = 256; |
| erp->function = dasd_3990_erp_action_10_32; |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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->startdev; |
| __u32 cpa = 0; |
| struct dasd_ccw_req *cqr; |
| struct dasd_ccw_req *erp; |
| struct DE_eckd_data *DE_data; |
| struct PFX_eckd_data *PFX_data; |
| char *LO_data; /* LO_eckd_data_t */ |
| struct ccw1 *ccw, *oldccw; |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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; |
| } |
| |
| if (scsw_is_tm(&cqr->irb.scsw)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "32 bit sense, action 1B is not defined" |
| " in transport mode - just retry"); |
| return default_erp; |
| } |
| |
| /* for imprecise ending just do default erp */ |
| if (sense[1] & 0x01) { |
| DBF_DEV_EVENT(DBF_WARNING, 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.cmd.cpa; |
| |
| if (cpa == 0) { |
| DBF_DEV_EVENT(DBF_WARNING, 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)) { |
| /* internal error 01 - Unable to allocate ERP */ |
| dev_err(&device->cdev->dev, "An error occurred in the DASD " |
| "device driver, reason=%s\n", "01"); |
| return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); |
| } |
| |
| /* use original DE */ |
| DE_data = erp->data; |
| oldccw = cqr->cpaddr; |
| if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { |
| PFX_data = cqr->data; |
| memcpy(DE_data, &PFX_data->define_extent, |
| sizeof(struct DE_eckd_data)); |
| } else |
| 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)) { |
| /* should not */ |
| 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->flags = default_erp->flags; |
| erp->function = dasd_3990_erp_action_1B_32; |
| erp->refers = default_erp->refers; |
| erp->startdev = device; |
| erp->memdev = 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->startdev; |
| __u32 cpa = 0; |
| struct dasd_ccw_req *cqr; |
| struct dasd_ccw_req *erp; |
| char *LO_data; /* struct LO_eckd_data */ |
| struct ccw1 *ccw; |
| |
| DBF_DEV_EVENT(DBF_WARNING, 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; |
| } |
| |
| if (scsw_is_tm(&cqr->irb.scsw)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "32 bit sense, action 1B, update," |
| " in transport mode - just retry"); |
| return previous_erp; |
| } |
| |
| /* for imprecise ending just do default erp */ |
| if (sense[1] & 0x01) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "Imprecise ending is set - just retry"); |
| |
| previous_erp->status = DASD_CQR_FILLED; |
| |
| 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.cmd.cpa; |
| |
| if (cpa == 0) { |
| /* internal error 02 - |
| Unable to determine address of the CCW to be restarted */ |
| dev_err(&device->cdev->dev, "An error occurred in the DASD " |
| "device driver, reason=%s\n", "02"); |
| |
| 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)) { |
| /* 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_FILLED; |
| |
| 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 && |
| !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { |
| /* reset the lpm and the status to be able to |
| * try further actions. */ |
| erp->lpm = erp->startdev->path_data.opm; |
| erp->status = DASD_CQR_NEED_ERP; |
| } |
| } |
| |
| 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 controller 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 |
| internal error 05 - Set device to suspended duplex state |
| should be done */ |
| struct dasd_device *device = erp->startdev; |
| dev_err(&device->cdev->dev, |
| "An error occurred in the DASD device driver, " |
| "reason=%s\n", "05"); |
| |
| } |
| |
| 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_NEED_ERP)) { |
| |
| dasd_3990_erp_compound_path(erp, sense); |
| } |
| |
| if ((erp->function == dasd_3990_erp_compound_path) && |
| (erp->status == DASD_CQR_NEED_ERP)) { |
| |
| erp = dasd_3990_erp_compound_code(erp, sense); |
| } |
| |
| if ((erp->function == dasd_3990_erp_compound_code) && |
| (erp->status == DASD_CQR_NEED_ERP)) { |
| |
| dasd_3990_erp_compound_config(erp, sense); |
| } |
| |
| /* if no compound action ERP specified, the request failed */ |
| if (erp->status == DASD_CQR_NEED_ERP) |
| erp->status = DASD_CQR_FAILED; |
| |
| return erp; |
| |
| } /* end dasd_3990_erp_compound */ |
| |
| /* |
| *DASD_3990_ERP_HANDLE_SIM |
| * |
| *DESCRIPTION |
| * inspects the SIM SENSE data and starts an appropriate action |
| * |
| * PARAMETER |
| * sense sense data of the actual error |
| * |
| * RETURN VALUES |
| * none |
| */ |
| void |
| dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) |
| { |
| /* print message according to log or message to operator mode */ |
| if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { |
| /* print SIM SRC from RefCode */ |
| dev_err(&device->cdev->dev, "SIM - SRC: " |
| "%02x%02x%02x%02x\n", sense[22], |
| sense[23], sense[11], sense[12]); |
| } else if (sense[24] & DASD_SIM_LOG) { |
| /* print SIM SRC Refcode */ |
| dev_warn(&device->cdev->dev, "log SIM - SRC: " |
| "%02x%02x%02x%02x\n", sense[22], |
| sense[23], sense[11], sense[12]); |
| } |
| } |
| |
| /* |
| * 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->startdev; |
| |
| erp->function = dasd_3990_erp_inspect_32; |
| |
| /* check for SIM sense data */ |
| if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) |
| dasd_3990_erp_handle_sim(device, sense); |
| |
| 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 */ |
| DBF_DEV_EVENT(DBF_DEBUG, device, "%s", |
| "ERP called for successful request" |
| " - just retry"); |
| break; |
| |
| case 0x01: /* fatal error */ |
| dev_err(&device->cdev->dev, |
| "ERP failed for the DASD\n"); |
| |
| 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 |
| internal error 08 - update write command error*/ |
| dev_err(&device->cdev->dev, "An error occurred in the " |
| "DASD device driver, reason=%s\n", "08"); |
| |
| 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 |
| internal error 07 - The next track is not |
| within the defined storage extent */ |
| dev_err(&device->cdev->dev, |
| "An error occurred in the DASD device driver, " |
| "reason=%s\n", "07"); |
| |
| 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_emerg(&device->cdev->dev, |
| "Data recovered during retry with PCI " |
| "fetch mode active\n"); |
| |
| /* 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 */ |
| DBF_DEV_EVENT(DBF_WARNING, 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 */ |
| DBF_DEV_EVENT(DBF_WARNING, 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 functions (24 and 32 byte sense) |
| ***************************************************************************** |
| */ |
| |
| /* |
| * DASD_3990_ERP_CONTROL_CHECK |
| * |
| * DESCRIPTION |
| * Does a generic inspection if a control check occured and sets up |
| * the related error recovery procedure |
| * |
| * PARAMETER |
| * erp pointer to the currently created default ERP |
| * |
| * RETURN VALUES |
| * erp_filled pointer to the erp |
| */ |
| |
| static struct dasd_ccw_req * |
| dasd_3990_erp_control_check(struct dasd_ccw_req *erp) |
| { |
| struct dasd_device *device = erp->startdev; |
| |
| if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK |
| | SCHN_STAT_CHN_CTRL_CHK)) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "channel or interface control check"); |
| erp = dasd_3990_erp_action_4(erp, NULL); |
| } |
| return erp; |
| } |
| |
| /* |
| * 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; |
| char *sense; |
| |
| /* if this problem occured on an alias retry on base */ |
| erp_new = dasd_3990_erp_inspect_alias(erp); |
| if (erp_new) |
| return erp_new; |
| |
| /* sense data are located in the refers record of the |
| * already set up new ERP ! |
| * check if concurrent sens is available |
| */ |
| sense = dasd_get_sense(&erp->refers->irb); |
| if (!sense) |
| erp_new = dasd_3990_erp_control_check(erp); |
| /* distinguish between 24 and 32 byte sense data */ |
| else 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). |
| * For a command mode cqr the erp is initialized as an default erp |
| * (retry TIC). |
| * For transport mode we make a copy of the original TCW (points to |
| * the original TCCB, TIDALs, etc.) but give it a fresh |
| * TSB so the original sense data will not be changed. |
| * |
| * 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->startdev; |
| struct ccw1 *ccw; |
| struct dasd_ccw_req *erp; |
| int cplength, datasize; |
| struct tcw *tcw; |
| struct tsb *tsb; |
| |
| if (cqr->cpmode == 1) { |
| cplength = 0; |
| /* TCW needs to be 64 byte aligned, so leave enough room */ |
| datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); |
| } else { |
| cplength = 2; |
| datasize = 0; |
| } |
| |
| /* allocate additional request block */ |
| erp = dasd_alloc_erp_request((char *) &cqr->magic, |
| cplength, datasize, device); |
| if (IS_ERR(erp)) { |
| if (cqr->retries <= 0) { |
| DBF_DEV_EVENT(DBF_ERR, device, "%s", |
| "Unable to allocate ERP request"); |
| cqr->status = DASD_CQR_FAILED; |
| cqr->stopclk = get_clock (); |
| } else { |
| DBF_DEV_EVENT(DBF_ERR, device, |
| "Unable to allocate ERP request " |
| "(%i retries left)", |
| cqr->retries); |
| dasd_block_set_timer(device->block, (HZ << 3)); |
| } |
| return erp; |
| } |
| |
| ccw = cqr->cpaddr; |
| if (cqr->cpmode == 1) { |
| /* make a shallow copy of the original tcw but set new tsb */ |
| erp->cpmode = 1; |
| erp->cpaddr = PTR_ALIGN(erp->data, 64); |
| tcw = erp->cpaddr; |
| tsb = (struct tsb *) &tcw[1]; |
| *tcw = *((struct tcw *)cqr->cpaddr); |
| tcw->tsb = (long)tsb; |
| } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { |
| /* PSF cannot be chained from NOOP/TIC */ |
| erp->cpaddr = cqr->cpaddr; |
| } else { |
| /* 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->flags = cqr->flags; |
| erp->function = dasd_3990_erp_add_erp; |
| erp->refers = cqr; |
| erp->startdev = device; |
| erp->memdev = device; |
| erp->block = cqr->block; |
| 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); |
| |
| if (IS_ERR(erp)) |
| return erp; |
| |
| /* 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) |
| { |
| char *sense1, *sense2; |
| |
| if (cqr1->startdev != cqr2->startdev) |
| return 0; |
| |
| sense1 = dasd_get_sense(&cqr1->irb); |
| sense2 = dasd_get_sense(&cqr2->irb); |
| |
| /* one request has sense data, the other not -> no match, return 0 */ |
| if (!sense1 != !sense2) |
| return 0; |
| /* no sense data in both cases -> check cstat for IFCC */ |
| if (!sense1 && !sense2) { |
| if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | |
| SCHN_STAT_CHN_CTRL_CHK)) == |
| (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | |
| SCHN_STAT_CHN_CTRL_CHK))) |
| return 1; /* match with ifcc*/ |
| } |
| /* check sense data; byte 0-2,25,27 */ |
| if (!(sense1 && sense2 && |
| (memcmp(sense1, sense2, 3) == 0) && |
| (sense1[27] == sense2[27]) && |
| (sense1[25] == sense2[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->startdev; |
| char *sense = dasd_get_sense(&erp->irb); |
| |
| /* 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_1_sec) { |
| erp = dasd_3990_erp_action_1_sec(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 && !(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: |
| DBF_DEV_EVENT(DBF_WARNING, device, |
| "invalid subcommand modifier 0x%x " |
| "for Diagnostic Control Command", |
| sense[25]); |
| } |
| } |
| |
| /* check for 32 byte sense ERP */ |
| } else if (sense && |
| ((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_err(&device->cdev->dev, |
| "ERP %p has run out of retries and failed\n", 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->startdev; |
| 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->blocklist); |
| |
| erp_free = erp_done; |
| erp_done = erp_done->refers; |
| |
| /* free the finished erp request */ |
| dasd_free_erp_request(erp_free, erp_free->memdev); |
| |
| } /* end while */ |
| |
| if (erp->retries > 0) { |
| |
| char *sense = dasd_get_sense(&erp->refers->irb); |
| |
| /* check for special retries */ |
| if (sense && erp->function == dasd_3990_erp_action_4) { |
| |
| erp = dasd_3990_erp_action_4(erp, sense); |
| |
| } else if (sense && |
| erp->function == dasd_3990_erp_action_1B_32) { |
| |
| erp = dasd_3990_update_1B(erp, sense); |
| |
| } else if (sense && erp->function == dasd_3990_erp_int_req) { |
| |
| erp = dasd_3990_erp_int_req(erp); |
| |
| } else { |
| /* simple retry */ |
| DBF_DEV_EVENT(DBF_DEBUG, device, |
| "%i retries left for erp %p", |
| erp->retries, erp); |
| |
| /* handle the request again... */ |
| erp->status = DASD_CQR_FILLED; |
| } |
| |
| } 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 |
| * control 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->startdev; |
| struct dasd_ccw_req *temp_erp = NULL; |
| |
| if (device->features & DASD_FEATURE_ERPLOG) { |
| /* print current erp_chain */ |
| dev_err(&device->cdev->dev, |
| "ERP chain at BEGINNING of ERP-ACTION\n"); |
| for (temp_erp = cqr; |
| temp_erp != NULL; temp_erp = temp_erp->refers) { |
| |
| dev_err(&device->cdev->dev, |
| "ERP %p (%02x) refers to %p\n", |
| temp_erp, temp_erp->status, |
| temp_erp->refers); |
| } |
| } |
| |
| /* double-check if current erp/cqr was successful */ |
| if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && |
| (scsw_dstat(&cqr->irb.scsw) == |
| (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { |
| |
| DBF_DEV_EVENT(DBF_DEBUG, device, |
| "ERP called for successful request %p" |
| " - NO ERP necessary", cqr); |
| |
| cqr->status = DASD_CQR_DONE; |
| |
| 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); |
| if (IS_ERR(erp)) |
| return erp; |
| } 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_err(&device->cdev->dev, |
| "ERP chain at END of ERP-ACTION\n"); |
| for (temp_erp = erp; |
| temp_erp != NULL; temp_erp = temp_erp->refers) { |
| |
| dev_err(&device->cdev->dev, |
| "ERP %p (%02x) refers to %p\n", |
| temp_erp, temp_erp->status, |
| temp_erp->refers); |
| } |
| } |
| |
| /* enqueue ERP request if it's a new one */ |
| if (list_empty(&erp->blocklist)) { |
| cqr->status = DASD_CQR_IN_ERP; |
| /* add erp request before the cqr */ |
| list_add_tail(&erp->blocklist, &cqr->blocklist); |
| } |
| |
| |
| |
| return erp; |
| |
| } /* end dasd_3990_erp_action */ |