2830 lines
70 KiB
C
2830 lines
70 KiB
C
/*
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* Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com>
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* Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* Copyright IBM Corp. 2000, 2001
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*
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*/
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#define KMSG_COMPONENT "dasd-eckd"
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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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#include "dasd_int.h"
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#include "dasd_eckd.h"
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struct DCTL_data {
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unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */
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unsigned char modifier; /* Subcommand modifier */
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unsigned short res; /* reserved */
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} __attribute__ ((packed));
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/*
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*****************************************************************************
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* SECTION ERP HANDLING
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*****************************************************************************
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*/
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/*
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*****************************************************************************
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* 24 and 32 byte sense ERP functions
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*****************************************************************************
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*/
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/*
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* DASD_3990_ERP_CLEANUP
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*
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* DESCRIPTION
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* Removes the already build but not necessary ERP request and sets
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* the status of the original cqr / erp to the given (final) status
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*
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* PARAMETER
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* erp request to be blocked
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* final_status either DASD_CQR_DONE or DASD_CQR_FAILED
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*
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* RETURN VALUES
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* cqr original cqr
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*/
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static struct dasd_ccw_req *
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dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
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{
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struct dasd_ccw_req *cqr = erp->refers;
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dasd_free_erp_request(erp, erp->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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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");
|
|
break;
|
|
case 0x06:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Device check-2 error or Set "
|
|
"Sector is not complete\n");
|
|
break;
|
|
case 0x07:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Head address does not "
|
|
"compare\n");
|
|
break;
|
|
case 0x08:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Device status 1 not valid\n");
|
|
break;
|
|
case 0x09:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Device not ready\n");
|
|
break;
|
|
case 0x0A:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Track physical address did "
|
|
"not compare\n");
|
|
break;
|
|
case 0x0B:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Missing device address bit\n");
|
|
break;
|
|
case 0x0C:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Drive motor switch is off\n");
|
|
break;
|
|
case 0x0D:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Seek incomplete\n");
|
|
break;
|
|
case 0x0E:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Cylinder address did not "
|
|
"compare\n");
|
|
break;
|
|
case 0x0F:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Offset active cannot be "
|
|
"reset\n");
|
|
break;
|
|
default:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 1 - Reserved\n");
|
|
}
|
|
break;
|
|
|
|
case 0x20: /* Format 2 - 3990 Equipment Checks */
|
|
switch (msg_no) {
|
|
case 0x08:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 2 - 3990 check-2 error\n");
|
|
break;
|
|
case 0x0E:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 2 - Support facility errors\n");
|
|
break;
|
|
case 0x0F:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 2 - Microcode detected error "
|
|
"%02x\n",
|
|
sense[8]);
|
|
break;
|
|
default:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 2 - Reserved\n");
|
|
}
|
|
break;
|
|
|
|
case 0x30: /* Format 3 - 3990 Control Checks */
|
|
switch (msg_no) {
|
|
case 0x0F:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 3 - Allegiance terminated\n");
|
|
break;
|
|
default:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 3 - Reserved\n");
|
|
}
|
|
break;
|
|
|
|
case 0x40: /* Format 4 - Data Checks */
|
|
switch (msg_no) {
|
|
case 0x00:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Home address area error\n");
|
|
break;
|
|
case 0x01:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Count area error\n");
|
|
break;
|
|
case 0x02:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Key area error\n");
|
|
break;
|
|
case 0x03:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Data area error\n");
|
|
break;
|
|
case 0x04:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No sync byte in home address "
|
|
"area\n");
|
|
break;
|
|
case 0x05:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No sync byte in count address "
|
|
"area\n");
|
|
break;
|
|
case 0x06:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No sync byte in key area\n");
|
|
break;
|
|
case 0x07:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No sync byte in data area\n");
|
|
break;
|
|
case 0x08:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Home address area error; "
|
|
"offset active\n");
|
|
break;
|
|
case 0x09:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Count area error; offset "
|
|
"active\n");
|
|
break;
|
|
case 0x0A:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Key area error; offset "
|
|
"active\n");
|
|
break;
|
|
case 0x0B:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - Data area error; "
|
|
"offset active\n");
|
|
break;
|
|
case 0x0C:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No sync byte in home "
|
|
"address area; offset active\n");
|
|
break;
|
|
case 0x0D:
|
|
dev_warn(&device->cdev->dev,
|
|
"FORMAT 4 - No 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 */
|
|
dev_err(&device->cdev->dev, "An error occurred in the DASD "
|
|
"device driver, reason=%s\n", "09");
|
|
|
|
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_com_rej */
|
|
|
|
/*
|
|
* DASD_3990_ERP_BUS_OUT
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Bus Out Parity Check' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_bus_out(struct dasd_ccw_req * erp)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
/* first time set initial retry counter and erp_function */
|
|
/* and retry once without blocking queue */
|
|
/* (this enables easier enqueing of the cqr) */
|
|
if (erp->function != dasd_3990_erp_bus_out) {
|
|
erp->retries = 256;
|
|
erp->function = dasd_3990_erp_bus_out;
|
|
|
|
} else {
|
|
|
|
/* issue a message and wait for 'device ready' interrupt */
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"bus out parity error or BOPC requested by "
|
|
"channel");
|
|
|
|
dasd_3990_erp_block_queue(erp, 60*HZ);
|
|
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_bus_out */
|
|
|
|
/*
|
|
* DASD_3990_ERP_EQUIP_CHECK
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Equipment Check' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_equip_check;
|
|
|
|
if (sense[1] & SNS1_WRITE_INHIBITED) {
|
|
dev_info(&device->cdev->dev,
|
|
"Write inhibited path encountered\n");
|
|
|
|
/* vary path offline
|
|
internal error 04 - Path should be varied off-line.*/
|
|
dev_err(&device->cdev->dev, "An error occurred in the DASD "
|
|
"device driver, reason=%s\n", "04");
|
|
|
|
erp = dasd_3990_erp_action_1(erp);
|
|
|
|
} else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Equipment Check - " "environmental data present");
|
|
|
|
dasd_3990_handle_env_data(erp, sense);
|
|
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
|
|
} else if (sense[1] & SNS1_PERM_ERR) {
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Equipment Check - retry exhausted or "
|
|
"undesirable");
|
|
|
|
erp = dasd_3990_erp_action_1(erp);
|
|
|
|
} else {
|
|
/* all other equipment checks - Action 5 */
|
|
/* rest is done when retries == 0 */
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Equipment check or processing error");
|
|
|
|
erp = dasd_3990_erp_action_5(erp);
|
|
}
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_equip_check */
|
|
|
|
/*
|
|
* DASD_3990_ERP_DATA_CHECK
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Data Check' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_data_check;
|
|
|
|
if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */
|
|
|
|
/* issue message that the data has been corrected */
|
|
dev_emerg(&device->cdev->dev,
|
|
"Data recovered during retry with PCI "
|
|
"fetch mode active\n");
|
|
|
|
/* not possible to handle this situation in Linux */
|
|
panic("No way to inform application about the possibly "
|
|
"incorrect data");
|
|
|
|
} else if (sense[2] & SNS2_ENV_DATA_PRESENT) {
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Uncorrectable data check recovered secondary "
|
|
"addr of duplex pair");
|
|
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
|
|
} else if (sense[1] & SNS1_PERM_ERR) {
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Uncorrectable data check with internal "
|
|
"retry exhausted");
|
|
|
|
erp = dasd_3990_erp_action_1(erp);
|
|
|
|
} else {
|
|
/* all other data checks */
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Uncorrectable data check with retry count "
|
|
"exhausted...");
|
|
|
|
erp = dasd_3990_erp_action_5(erp);
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_data_check */
|
|
|
|
/*
|
|
* DASD_3990_ERP_OVERRUN
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Overrun' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_overrun;
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Overrun - service overrun or overrun"
|
|
" error requested by channel");
|
|
|
|
erp = dasd_3990_erp_action_5(erp);
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_overrun */
|
|
|
|
/*
|
|
* DASD_3990_ERP_INV_FORMAT
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Invalid Track Format' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_inv_format;
|
|
|
|
if (sense[2] & SNS2_ENV_DATA_PRESENT) {
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Track format error when destaging or "
|
|
"staging data");
|
|
|
|
dasd_3990_handle_env_data(erp, sense);
|
|
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
|
|
} else {
|
|
/* internal error 06 - The track format is not valid*/
|
|
dev_err(&device->cdev->dev,
|
|
"An error occurred in the DASD device driver, "
|
|
"reason=%s\n", "06");
|
|
|
|
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_inv_format */
|
|
|
|
/*
|
|
* DASD_3990_ERP_EOC
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'End-of-Cylinder' error.
|
|
*
|
|
* PARAMETER
|
|
* erp already added default erp
|
|
* RETURN VALUES
|
|
* erp pointer to original (failed) cqr.
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = default_erp->startdev;
|
|
|
|
dev_err(&device->cdev->dev,
|
|
"The cylinder data for accessing the DASD is inconsistent\n");
|
|
|
|
/* implement action 7 - BUG */
|
|
return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED);
|
|
|
|
} /* end dasd_3990_erp_EOC */
|
|
|
|
/*
|
|
* DASD_3990_ERP_ENV_DATA
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'Environmental-Data Present' error.
|
|
*
|
|
* PARAMETER
|
|
* erp current erp_head
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_env_data;
|
|
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present");
|
|
|
|
dasd_3990_handle_env_data(erp, sense);
|
|
|
|
/* don't retry on disabled interface */
|
|
if (sense[7] != 0x0F) {
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
} else {
|
|
erp->status = DASD_CQR_FILLED;
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_env_data */
|
|
|
|
/*
|
|
* DASD_3990_ERP_NO_REC
|
|
*
|
|
* DESCRIPTION
|
|
* Handles 24 byte 'No Record Found' error.
|
|
*
|
|
* PARAMETER
|
|
* erp already added default ERP
|
|
*
|
|
* RETURN VALUES
|
|
* erp new erp_head - pointer to new ERP
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = default_erp->startdev;
|
|
|
|
/*
|
|
* 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 configruation
|
|
* dependent error.
|
|
* Note: duplex handling is not implemented (yet).
|
|
*
|
|
* PARAMETER
|
|
* sense sense data of the actual error
|
|
* erp pointer to the currently created ERP
|
|
*
|
|
* RETURN VALUES
|
|
* erp modified ERP pointer
|
|
*
|
|
*/
|
|
static void
|
|
dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) {
|
|
|
|
/* set to suspended duplex state then restart
|
|
internal error 05 - Set device to suspended duplex state
|
|
should be done */
|
|
struct dasd_device *device = erp->startdev;
|
|
dev_err(&device->cdev->dev,
|
|
"An error occurred in the DASD device driver, "
|
|
"reason=%s\n", "05");
|
|
|
|
}
|
|
|
|
erp->function = dasd_3990_erp_compound_config;
|
|
|
|
} /* end dasd_3990_erp_compound_config */
|
|
|
|
/*
|
|
* DASD_3990_ERP_COMPOUND
|
|
*
|
|
* DESCRIPTION
|
|
* Does the further compound program action if
|
|
* compound retry was not successful.
|
|
*
|
|
* PARAMETER
|
|
* sense sense data of the actual error
|
|
* erp pointer to the current (failed) ERP
|
|
*
|
|
* RETURN VALUES
|
|
* erp (additional) ERP pointer
|
|
*
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
if ((erp->function == dasd_3990_erp_compound_retry) &&
|
|
(erp->status == DASD_CQR_NEED_ERP)) {
|
|
|
|
dasd_3990_erp_compound_path(erp, sense);
|
|
}
|
|
|
|
if ((erp->function == dasd_3990_erp_compound_path) &&
|
|
(erp->status == DASD_CQR_NEED_ERP)) {
|
|
|
|
erp = dasd_3990_erp_compound_code(erp, sense);
|
|
}
|
|
|
|
if ((erp->function == dasd_3990_erp_compound_code) &&
|
|
(erp->status == DASD_CQR_NEED_ERP)) {
|
|
|
|
dasd_3990_erp_compound_config(erp, sense);
|
|
}
|
|
|
|
/* if no compound action ERP specified, the request failed */
|
|
if (erp->status == DASD_CQR_NEED_ERP)
|
|
erp->status = DASD_CQR_FAILED;
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_compound */
|
|
|
|
/*
|
|
*DASD_3990_ERP_HANDLE_SIM
|
|
*
|
|
*DESCRIPTION
|
|
* inspects the SIM SENSE data and starts an appropriate action
|
|
*
|
|
* PARAMETER
|
|
* sense sense data of the actual error
|
|
*
|
|
* RETURN VALUES
|
|
* none
|
|
*/
|
|
void
|
|
dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense)
|
|
{
|
|
/* print message according to log or message to operator mode */
|
|
if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) {
|
|
/* print SIM SRC from RefCode */
|
|
dev_err(&device->cdev->dev, "SIM - SRC: "
|
|
"%02x%02x%02x%02x\n", sense[22],
|
|
sense[23], sense[11], sense[12]);
|
|
} else if (sense[24] & DASD_SIM_LOG) {
|
|
/* print SIM SRC Refcode */
|
|
dev_warn(&device->cdev->dev, "log SIM - SRC: "
|
|
"%02x%02x%02x%02x\n", sense[22],
|
|
sense[23], sense[11], sense[12]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* DASD_3990_ERP_INSPECT_32
|
|
*
|
|
* DESCRIPTION
|
|
* Does a detailed inspection of the 32 byte sense data
|
|
* and sets up a related error recovery action.
|
|
*
|
|
* PARAMETER
|
|
* sense sense data of the actual error
|
|
* erp pointer to the currently created default ERP
|
|
*
|
|
* RETURN VALUES
|
|
* erp_filled pointer to the ERP
|
|
*
|
|
*/
|
|
static struct dasd_ccw_req *
|
|
dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense)
|
|
{
|
|
|
|
struct dasd_device *device = erp->startdev;
|
|
|
|
erp->function = dasd_3990_erp_inspect_32;
|
|
|
|
/* check for SIM sense data */
|
|
if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)
|
|
dasd_3990_erp_handle_sim(device, sense);
|
|
|
|
if (sense[25] & DASD_SENSE_BIT_0) {
|
|
|
|
/* compound program action codes (byte25 bit 0 == '1') */
|
|
dasd_3990_erp_compound_retry(erp, sense);
|
|
|
|
} else {
|
|
|
|
/* single program action codes (byte25 bit 0 == '0') */
|
|
switch (sense[25]) {
|
|
|
|
case 0x00: /* success - use default ERP for retries */
|
|
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
|
|
"ERP called for successful request"
|
|
" - just retry");
|
|
break;
|
|
|
|
case 0x01: /* fatal error */
|
|
dev_err(&device->cdev->dev,
|
|
"ERP failed for the DASD\n");
|
|
|
|
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
|
break;
|
|
|
|
case 0x02: /* intervention required */
|
|
case 0x03: /* intervention required during dual copy */
|
|
erp = dasd_3990_erp_int_req(erp);
|
|
break;
|
|
|
|
case 0x0F: /* length mismatch during update write command
|
|
internal error 08 - update write command error*/
|
|
dev_err(&device->cdev->dev, "An error occurred in the "
|
|
"DASD device driver, reason=%s\n", "08");
|
|
|
|
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
|
break;
|
|
|
|
case 0x10: /* logging required for other channel program */
|
|
erp = dasd_3990_erp_action_10_32(erp, sense);
|
|
break;
|
|
|
|
case 0x15: /* next track outside defined extend
|
|
internal error 07 - The next track is not
|
|
within the defined storage extent */
|
|
dev_err(&device->cdev->dev,
|
|
"An error occurred in the DASD device driver, "
|
|
"reason=%s\n", "07");
|
|
|
|
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
|
|
break;
|
|
|
|
case 0x1B: /* unexpected condition during write */
|
|
|
|
erp = dasd_3990_erp_action_1B_32(erp, sense);
|
|
break;
|
|
|
|
case 0x1C: /* invalid data */
|
|
dev_emerg(&device->cdev->dev,
|
|
"Data recovered during retry with PCI "
|
|
"fetch mode active\n");
|
|
|
|
/* not possible to handle this situation in Linux */
|
|
panic
|
|
("Invalid data - No way to inform application "
|
|
"about the possibly incorrect data");
|
|
break;
|
|
|
|
case 0x1D: /* state-change pending */
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"A State change pending condition exists "
|
|
"for the subsystem or device");
|
|
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
break;
|
|
|
|
case 0x1E: /* busy */
|
|
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
|
|
"Busy condition exists "
|
|
"for the subsystem or device");
|
|
erp = dasd_3990_erp_action_4(erp, sense);
|
|
break;
|
|
|
|
default: /* all others errors - default erp */
|
|
break;
|
|
}
|
|
}
|
|
|
|
return erp;
|
|
|
|
} /* end dasd_3990_erp_inspect_32 */
|
|
|
|
static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum)
|
|
{
|
|
int pos = pathmask_to_pos(lpum);
|
|
|
|
/* no remaining path, cannot disable */
|
|
if (!(dasd_path_get_opm(device) & ~lpum))
|
|
return;
|
|
|
|
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);
|
|
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 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);
|
|
}
|
|
|
|
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 */
|