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2854 lines
71 KiB
2854 lines
71 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Author(s)......: Horst Hummel <[email protected]> |
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* Holger Smolinski <[email protected]> |
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* Bugreports.to..: <[email protected]> |
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* Copyright IBM Corp. 2000, 2001 |
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* |
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*/ |
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|
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#define KMSG_COMPONENT "dasd-eckd" |
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|
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#include <linux/timer.h> |
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#include <asm/idals.h> |
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#define PRINTK_HEADER "dasd_erp(3990): " |
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|
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#include "dasd_int.h" |
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#include "dasd_eckd.h" |
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struct DCTL_data { |
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unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ |
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unsigned char modifier; /* Subcommand modifier */ |
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unsigned short res; /* reserved */ |
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} __attribute__ ((packed)); |
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|
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/* |
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***************************************************************************** |
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* SECTION ERP HANDLING |
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***************************************************************************** |
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*/ |
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/* |
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***************************************************************************** |
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* 24 and 32 byte sense ERP functions |
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***************************************************************************** |
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*/ |
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|
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/* |
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* DASD_3990_ERP_CLEANUP |
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* |
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* DESCRIPTION |
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* Removes the already build but not necessary ERP request and sets |
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* the status of the original cqr / erp to the given (final) status |
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* |
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* PARAMETER |
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* erp request to be blocked |
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* final_status either DASD_CQR_DONE or DASD_CQR_FAILED |
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* |
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* RETURN VALUES |
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* cqr original cqr |
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*/ |
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static struct dasd_ccw_req * |
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dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) |
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{ |
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struct dasd_ccw_req *cqr = erp->refers; |
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dasd_free_erp_request(erp, erp->memdev); |
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cqr->status = final_status; |
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return cqr; |
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} /* end dasd_3990_erp_cleanup */ |
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/* |
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* DASD_3990_ERP_BLOCK_QUEUE |
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* |
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* DESCRIPTION |
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* Block the given device request queue to prevent from further |
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* processing until the started timer has expired or an related |
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* interrupt was received. |
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*/ |
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static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) |
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{ |
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struct dasd_device *device = erp->startdev; |
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unsigned long flags; |
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DBF_DEV_EVENT(DBF_INFO, device, |
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"blocking request queue for %is", expires/HZ); |
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spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
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dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); |
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spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
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erp->status = DASD_CQR_FILLED; |
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if (erp->block) |
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dasd_block_set_timer(erp->block, expires); |
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else |
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dasd_device_set_timer(device, expires); |
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} |
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/* |
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* DASD_3990_ERP_INT_REQ |
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* |
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* DESCRIPTION |
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* Handles 'Intervention Required' error. |
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* This means either device offline or not installed. |
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* |
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* PARAMETER |
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* erp current erp |
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* RETURN VALUES |
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* erp modified erp |
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*/ |
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static struct dasd_ccw_req * |
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dasd_3990_erp_int_req(struct dasd_ccw_req * erp) |
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{ |
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struct dasd_device *device = erp->startdev; |
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/* first time set initial retry counter and erp_function */ |
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/* and retry once without blocking queue */ |
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/* (this enables easier enqueing of the cqr) */ |
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if (erp->function != dasd_3990_erp_int_req) { |
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erp->retries = 256; |
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erp->function = dasd_3990_erp_int_req; |
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} else { |
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/* issue a message and wait for 'device ready' interrupt */ |
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dev_err(&device->cdev->dev, |
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"is offline or not installed - " |
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"INTERVENTION REQUIRED!!\n"); |
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dasd_3990_erp_block_queue(erp, 60*HZ); |
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} |
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return erp; |
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} /* end dasd_3990_erp_int_req */ |
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/* |
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* DASD_3990_ERP_ALTERNATE_PATH |
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* |
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* DESCRIPTION |
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* Repeat the operation on a different channel path. |
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* If all alternate paths have been tried, the request is posted with a |
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* permanent error. |
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* |
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* PARAMETER |
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* erp pointer to the current ERP |
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* |
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* RETURN VALUES |
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* erp modified pointer to the ERP |
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*/ |
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static void |
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dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) |
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{ |
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struct dasd_device *device = erp->startdev; |
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__u8 opm; |
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unsigned long flags; |
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/* try alternate valid path */ |
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spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); |
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opm = ccw_device_get_path_mask(device->cdev); |
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spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); |
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if (erp->lpm == 0) |
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erp->lpm = dasd_path_get_opm(device) & |
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~(erp->irb.esw.esw0.sublog.lpum); |
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else |
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erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); |
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if ((erp->lpm & opm) != 0x00) { |
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DBF_DEV_EVENT(DBF_WARNING, device, |
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"try alternate lpm=%x (lpum=%x / opm=%x)", |
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erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); |
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/* reset status to submit the request again... */ |
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erp->status = DASD_CQR_FILLED; |
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erp->retries = 10; |
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} else { |
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dev_err(&device->cdev->dev, |
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"The DASD cannot be reached on any path (lpum=%x" |
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"/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); |
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/* post request with permanent error */ |
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erp->status = DASD_CQR_FAILED; |
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} |
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} /* end dasd_3990_erp_alternate_path */ |
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/* |
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* DASD_3990_ERP_DCTL |
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* |
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* DESCRIPTION |
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* Setup cqr to do the Diagnostic Control (DCTL) command with an |
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* Inhibit Write subcommand (0x20) and the given modifier. |
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* |
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* PARAMETER |
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* erp pointer to the current (failed) ERP |
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* modifier subcommand modifier |
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* |
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* RETURN VALUES |
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* dctl_cqr pointer to NEW dctl_cqr |
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* |
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*/ |
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static struct dasd_ccw_req * |
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dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) |
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{ |
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struct dasd_device *device = erp->startdev; |
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struct DCTL_data *DCTL_data; |
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struct ccw1 *ccw; |
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struct dasd_ccw_req *dctl_cqr; |
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dctl_cqr = dasd_alloc_erp_request((char *) &erp->magic, 1, |
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sizeof(struct DCTL_data), |
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device); |
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if (IS_ERR(dctl_cqr)) { |
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dev_err(&device->cdev->dev, |
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"Unable to allocate DCTL-CQR\n"); |
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erp->status = DASD_CQR_FAILED; |
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return erp; |
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} |
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DCTL_data = dctl_cqr->data; |
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DCTL_data->subcommand = 0x02; /* Inhibit Write */ |
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DCTL_data->modifier = modifier; |
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ccw = dctl_cqr->cpaddr; |
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memset(ccw, 0, sizeof(struct ccw1)); |
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ccw->cmd_code = CCW_CMD_DCTL; |
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ccw->count = 4; |
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ccw->cda = (__u32)(addr_t) DCTL_data; |
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dctl_cqr->flags = erp->flags; |
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dctl_cqr->function = dasd_3990_erp_DCTL; |
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dctl_cqr->refers = erp; |
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dctl_cqr->startdev = device; |
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dctl_cqr->memdev = device; |
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dctl_cqr->magic = erp->magic; |
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dctl_cqr->expires = 5 * 60 * HZ; |
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dctl_cqr->retries = 2; |
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dctl_cqr->buildclk = get_tod_clock(); |
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dctl_cqr->status = DASD_CQR_FILLED; |
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return dctl_cqr; |
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} /* end dasd_3990_erp_DCTL */ |
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/* |
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* DASD_3990_ERP_ACTION_1 |
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* |
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* DESCRIPTION |
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* Setup ERP to do the ERP action 1 (see Reference manual). |
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* Repeat the operation on a different channel path. |
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* As deviation from the recommended recovery action, we reset the path mask |
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* after we have tried each path and go through all paths a second time. |
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* This will cover situations where only one path at a time is actually down, |
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* but all paths fail and recover just with the same sequence and timing as |
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* we try to use them (flapping links). |
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* If all alternate paths have been tried twice, the request is posted with |
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* a permanent error. |
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* |
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* PARAMETER |
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* erp pointer to the current ERP |
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* |
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* RETURN VALUES |
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* erp pointer to the ERP |
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* |
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*/ |
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static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) |
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{ |
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erp->function = dasd_3990_erp_action_1_sec; |
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dasd_3990_erp_alternate_path(erp); |
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return erp; |
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} |
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static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp) |
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{ |
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erp->function = dasd_3990_erp_action_1; |
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dasd_3990_erp_alternate_path(erp); |
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if (erp->status == DASD_CQR_FAILED && |
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!test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { |
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erp->status = DASD_CQR_FILLED; |
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erp->retries = 10; |
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erp->lpm = dasd_path_get_opm(erp->startdev); |
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erp->function = dasd_3990_erp_action_1_sec; |
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} |
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return erp; |
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} /* end dasd_3990_erp_action_1(b) */ |
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/* |
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* DASD_3990_ERP_ACTION_4 |
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* |
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* DESCRIPTION |
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* Setup ERP to do the ERP action 4 (see Reference manual). |
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* Set the current request to PENDING to block the CQR queue for that device |
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* until the state change interrupt appears. |
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* Use a timer (20 seconds) to retry the cqr if the interrupt is still |
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* missing. |
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* |
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* PARAMETER |
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* sense sense data of the actual error |
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* erp pointer to the current ERP |
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* |
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* RETURN VALUES |
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* erp pointer to the ERP |
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* |
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*/ |
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static struct dasd_ccw_req * |
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dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) |
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{ |
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struct dasd_device *device = erp->startdev; |
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/* first time set initial retry counter and erp_function */ |
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/* and retry once without waiting for state change pending */ |
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/* interrupt (this enables easier enqueing of the cqr) */ |
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if (erp->function != dasd_3990_erp_action_4) { |
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DBF_DEV_EVENT(DBF_INFO, device, "%s", |
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"dasd_3990_erp_action_4: first time retry"); |
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erp->retries = 256; |
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erp->function = dasd_3990_erp_action_4; |
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} else { |
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if (sense && (sense[25] == 0x1D)) { /* state change pending */ |
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DBF_DEV_EVENT(DBF_INFO, device, |
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"waiting for state change pending " |
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"interrupt, %d retries left", |
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erp->retries); |
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dasd_3990_erp_block_queue(erp, 30*HZ); |
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} else if (sense && (sense[25] == 0x1E)) { /* busy */ |
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DBF_DEV_EVENT(DBF_INFO, device, |
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"busy - redriving request later, " |
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"%d retries left", |
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erp->retries); |
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dasd_3990_erp_block_queue(erp, HZ); |
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} else { |
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/* no state change pending - retry */ |
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DBF_DEV_EVENT(DBF_INFO, device, |
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"redriving request immediately, " |
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"%d retries left", |
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erp->retries); |
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erp->status = DASD_CQR_FILLED; |
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} |
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} |
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return erp; |
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} /* end dasd_3990_erp_action_4 */ |
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/* |
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***************************************************************************** |
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* 24 byte sense ERP functions (only) |
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***************************************************************************** |
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*/ |
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/* |
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* DASD_3990_ERP_ACTION_5 |
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* |
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* DESCRIPTION |
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* Setup ERP to do the ERP action 5 (see Reference manual). |
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* NOTE: Further handling is done in xxx_further_erp after the retries. |
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* |
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* PARAMETER |
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* erp pointer to the current ERP |
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* |
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* RETURN VALUES |
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* erp pointer to the ERP |
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* |
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*/ |
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static struct dasd_ccw_req * |
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dasd_3990_erp_action_5(struct dasd_ccw_req * erp) |
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{ |
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/* first of all retry */ |
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erp->retries = 10; |
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erp->function = dasd_3990_erp_action_5; |
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return erp; |
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} /* end dasd_3990_erp_action_5 */ |
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/* |
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* DASD_3990_HANDLE_ENV_DATA |
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* |
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* DESCRIPTION |
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* Handles 24 byte 'Environmental data present'. |
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* Does a analysis of the sense data (message Format) |
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* and prints the error messages. |
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* |
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* PARAMETER |
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* sense current sense data |
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* |
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* RETURN VALUES |
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* void |
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*/ |
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static void |
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dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) |
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{ |
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struct dasd_device *device = erp->startdev; |
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char msg_format = (sense[7] & 0xF0); |
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char msg_no = (sense[7] & 0x0F); |
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char errorstring[ERRORLENGTH]; |
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switch (msg_format) { |
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case 0x00: /* Format 0 - Program or System Checks */ |
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if (sense[1] & 0x10) { /* check message to operator bit */ |
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switch (msg_no) { |
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case 0x00: /* No Message */ |
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break; |
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case 0x01: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Invalid Command\n"); |
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break; |
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case 0x02: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Invalid Command " |
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"Sequence\n"); |
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break; |
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case 0x03: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - CCW Count less than " |
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"required\n"); |
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break; |
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case 0x04: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Invalid Parameter\n"); |
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break; |
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case 0x05: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Diagnostic of Special" |
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" Command Violates File Mask\n"); |
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break; |
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case 0x07: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Channel Returned with " |
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"Incorrect retry CCW\n"); |
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break; |
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case 0x08: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Reset Notification\n"); |
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break; |
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case 0x09: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Storage Path Restart\n"); |
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break; |
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case 0x0A: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Channel requested " |
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"... %02x\n", sense[8]); |
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break; |
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case 0x0B: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Invalid Defective/" |
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"Alternate Track Pointer\n"); |
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break; |
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case 0x0C: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - DPS Installation " |
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"Check\n"); |
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break; |
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case 0x0E: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Command Invalid on " |
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"Secondary Address\n"); |
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break; |
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case 0x0F: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Status Not As " |
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"Required: reason %02x\n", |
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sense[8]); |
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break; |
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default: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Reserved\n"); |
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} |
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} else { |
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switch (msg_no) { |
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case 0x00: /* No Message */ |
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break; |
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case 0x01: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Device Error " |
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"Source\n"); |
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break; |
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case 0x02: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Reserved\n"); |
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break; |
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case 0x03: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Device Fenced - " |
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"device = %02x\n", sense[4]); |
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break; |
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case 0x04: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Data Pinned for " |
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"Device\n"); |
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break; |
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default: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 0 - Reserved\n"); |
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} |
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} |
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break; |
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|
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case 0x10: /* Format 1 - Device Equipment Checks */ |
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switch (msg_no) { |
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case 0x00: /* No Message */ |
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break; |
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case 0x01: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Device Status 1 not as " |
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"expected\n"); |
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break; |
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case 0x03: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Index missing\n"); |
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break; |
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case 0x04: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Interruption cannot be " |
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"reset\n"); |
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break; |
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case 0x05: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Device did not respond to " |
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"selection\n"); |
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break; |
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case 0x06: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Device check-2 error or Set " |
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"Sector is not complete\n"); |
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break; |
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case 0x07: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Head address does not " |
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"compare\n"); |
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break; |
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case 0x08: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Device status 1 not valid\n"); |
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break; |
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case 0x09: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Device not ready\n"); |
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break; |
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case 0x0A: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Track physical address did " |
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"not compare\n"); |
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break; |
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case 0x0B: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Missing device address bit\n"); |
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break; |
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case 0x0C: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Drive motor switch is off\n"); |
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break; |
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case 0x0D: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Seek incomplete\n"); |
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break; |
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case 0x0E: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Cylinder address did not " |
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"compare\n"); |
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break; |
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case 0x0F: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Offset active cannot be " |
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"reset\n"); |
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break; |
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default: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 1 - Reserved\n"); |
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} |
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break; |
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|
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case 0x20: /* Format 2 - 3990 Equipment Checks */ |
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switch (msg_no) { |
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case 0x08: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 2 - 3990 check-2 error\n"); |
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break; |
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case 0x0E: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 2 - Support facility errors\n"); |
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break; |
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case 0x0F: |
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dev_warn(&device->cdev->dev, |
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"FORMAT 2 - Microcode detected error " |
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"%02x\n", |
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sense[8]); |
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break; |
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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 sync 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 sync 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 F - 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 */ |
|
if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags)) |
|
dev_err(&device->cdev->dev, |
|
"An error occurred in the DASD device driver, reason=09\n"); |
|
|
|
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; |
|
|
|
/* |
|
* In some cases the 'No Record Found' error might be expected and |
|
* log messages shouldn't be written then. |
|
* Check if the according suppress bit is set. |
|
*/ |
|
if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags)) |
|
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; |
|
|
|
/* |
|
* In some cases the 'File Protected' error might be expected and |
|
* log messages shouldn't be written then. |
|
* Check if the according suppress bit is set. |
|
*/ |
|
if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags)) |
|
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 = default_erp->expires; |
|
erp->retries = 256; |
|
erp->buildclk = get_tod_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 = dasd_path_get_opm(erp->startdev); |
|
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 configuration |
|
* 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 */ |
|
|
|
static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum) |
|
{ |
|
int pos = pathmask_to_pos(lpum); |
|
|
|
if (!(device->features & DASD_FEATURE_PATH_AUTODISABLE)) { |
|
dev_err(&device->cdev->dev, |
|
"Path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", |
|
device->path[pos].cssid, device->path[pos].chpid, lpum); |
|
goto out; |
|
} |
|
|
|
/* no remaining path, cannot disable */ |
|
if (!(dasd_path_get_opm(device) & ~lpum)) { |
|
dev_err(&device->cdev->dev, |
|
"Last path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", |
|
device->path[pos].cssid, device->path[pos].chpid, lpum); |
|
goto out; |
|
} |
|
|
|
dev_err(&device->cdev->dev, |
|
"Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n", |
|
device->path[pos].cssid, device->path[pos].chpid, lpum); |
|
dasd_path_remove_opm(device, lpum); |
|
dasd_path_add_ifccpm(device, lpum); |
|
|
|
out: |
|
device->path[pos].errorclk = 0; |
|
atomic_set(&device->path[pos].error_count, 0); |
|
} |
|
|
|
static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp) |
|
{ |
|
struct dasd_device *device = erp->startdev; |
|
__u8 lpum = erp->refers->irb.esw.esw1.lpum; |
|
int pos = pathmask_to_pos(lpum); |
|
unsigned long clk; |
|
|
|
if (!device->path_thrhld) |
|
return; |
|
|
|
clk = get_tod_clock(); |
|
/* |
|
* check if the last error is longer ago than the timeout, |
|
* if so reset error state |
|
*/ |
|
if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC) |
|
>= device->path_interval) { |
|
atomic_set(&device->path[pos].error_count, 0); |
|
device->path[pos].errorclk = 0; |
|
} |
|
atomic_inc(&device->path[pos].error_count); |
|
device->path[pos].errorclk = clk; |
|
/* threshold exceeded disable path if possible */ |
|
if (atomic_read(&device->path[pos].error_count) >= |
|
device->path_thrhld) |
|
dasd_3990_erp_disable_path(device, lpum); |
|
} |
|
|
|
/* |
|
***************************************************************************** |
|
* main ERP control functions (24 and 32 byte sense) |
|
***************************************************************************** |
|
*/ |
|
|
|
/* |
|
* DASD_3990_ERP_CONTROL_CHECK |
|
* |
|
* DESCRIPTION |
|
* Does a generic inspection if a control check occurred 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"); |
|
dasd_3990_erp_account_error(erp); |
|
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 occurred 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 function 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_tod_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 = cqr->expires; |
|
erp->retries = 256; |
|
erp->buildclk = get_tod_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); |
|
} |
|
|
|
|
|
/* |
|
* For path verification work we need to stick with the path that was |
|
* originally chosen so that the per path configuration data is |
|
* assigned correctly. |
|
*/ |
|
if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) { |
|
erp->lpm = cqr->lpm; |
|
} |
|
|
|
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 */
|
|
|