/* ***************************************************************************** * SECTION ERP HANDLING *****************************************************************************
*/ /* ***************************************************************************** * 24 and 32 byte sense ERP functions *****************************************************************************
*/
/* * DASD_3990_ERP_CLEANUP * * DESCRIPTION * Removes the already build but not necessary ERP request and sets * the status of the original cqr / erp to the given (final) status * * PARAMETER * erp request to be blocked * final_status either DASD_CQR_DONE or DASD_CQR_FAILED * * RETURN VALUES * cqr original cqr
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status)
{ struct dasd_ccw_req *cqr = erp->refers;
/* * DASD_3990_ERP_BLOCK_QUEUE * * DESCRIPTION * Block the given device request queue to prevent from further * processing until the started timer has expired or an related * interrupt was received.
*/ staticvoid dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires)
{
/* * DASD_3990_ERP_INT_REQ * * DESCRIPTION * Handles 'Intervention Required' error. * This means either device offline or not installed. * * PARAMETER * erp current erp * RETURN VALUES * erp modified erp
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_int_req(struct dasd_ccw_req * erp)
{
struct dasd_device *device = erp->startdev;
/* first time set initial retry counter and erp_function */ /* and retry once without blocking queue */ /* (this enables easier enqueing of the cqr) */ if (erp->function != dasd_3990_erp_int_req) {
/* issue a message and wait for 'device ready' interrupt */
dev_err(&device->cdev->dev, "is offline or not installed - " "INTERVENTION REQUIRED!!\n");
dasd_3990_erp_block_queue(erp, 60*HZ);
}
return erp;
} /* end dasd_3990_erp_int_req */
/* * DASD_3990_ERP_ALTERNATE_PATH * * DESCRIPTION * Repeat the operation on a different channel path. * If all alternate paths have been tried, the request is posted with a * permanent error. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp modified pointer to the ERP
*/ staticvoid
dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp)
{ struct dasd_device *device = erp->startdev;
__u8 opm; unsignedlong flags;
/* reset status to submit the request again... */
erp->status = DASD_CQR_FILLED;
erp->retries = 10;
} else {
dev_err(&device->cdev->dev, "The DASD cannot be reached on any path (lpum=%x" "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm);
/* post request with permanent error */
erp->status = DASD_CQR_FAILED;
}
} /* end dasd_3990_erp_alternate_path */
/* * DASD_3990_ERP_DCTL * * DESCRIPTION * Setup cqr to do the Diagnostic Control (DCTL) command with an * Inhibit Write subcommand (0x20) and the given modifier. * * PARAMETER * erp pointer to the current (failed) ERP * modifier subcommand modifier * * RETURN VALUES * dctl_cqr pointer to NEW dctl_cqr *
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier)
{
/* * DASD_3990_ERP_ACTION_1 * * DESCRIPTION * Setup ERP to do the ERP action 1 (see Reference manual). * Repeat the operation on a different channel path. * As deviation from the recommended recovery action, we reset the path mask * after we have tried each path and go through all paths a second time. * This will cover situations where only one path at a time is actually down, * but all paths fail and recover just with the same sequence and timing as * we try to use them (flapping links). * If all alternate paths have been tried twice, the request is posted with * a permanent error. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP *
*/ staticstruct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp)
{
erp->function = dasd_3990_erp_action_1_sec;
dasd_3990_erp_alternate_path(erp); return erp;
}
/* * DASD_3990_ERP_ACTION_4 * * DESCRIPTION * Setup ERP to do the ERP action 4 (see Reference manual). * Set the current request to PENDING to block the CQR queue for that device * until the state change interrupt appears. * Use a timer (20 seconds) to retry the cqr if the interrupt is still * missing. * * PARAMETER * sense sense data of the actual error * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP *
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense)
{
struct dasd_device *device = erp->startdev;
/* first time set initial retry counter and erp_function */ /* and retry once without waiting for state change pending */ /* interrupt (this enables easier enqueing of the cqr) */ if (erp->function != dasd_3990_erp_action_4) {
DBF_DEV_EVENT(DBF_INFO, device, "%s", "dasd_3990_erp_action_4: first time retry");
/* * DASD_3990_ERP_ACTION_5 * * DESCRIPTION * Setup ERP to do the ERP action 5 (see Reference manual). * NOTE: Further handling is done in xxx_further_erp after the retries. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP *
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_action_5(struct dasd_ccw_req * erp)
{
/* first of all retry */
erp->retries = 10;
erp->function = dasd_3990_erp_action_5;
return erp;
} /* end dasd_3990_erp_action_5 */
/* * DASD_3990_HANDLE_ENV_DATA * * DESCRIPTION * Handles 24 byte 'Environmental data present'. * Does a analysis of the sense data (message Format) * and prints the error messages. * * PARAMETER * sense current sense data * * RETURN VALUES * void
*/ staticvoid
dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense)
{
switch (msg_format) { case 0x00: /* Format 0 - Program or System Checks */
if (sense[1] & 0x10) { /* check message to operator bit */
switch (msg_no) { case 0x00: /* No Message */ break; case 0x01:
dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Command\n"); break; case 0x02:
dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Command " "Sequence\n"); break; case 0x03:
dev_warn(&device->cdev->dev, "FORMAT 0 - CCW Count less than " "required\n"); break; case 0x04:
dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Parameter\n"); break; case 0x05:
dev_warn(&device->cdev->dev, "FORMAT 0 - Diagnostic of Special" " Command Violates File Mask\n"); break; case 0x07:
dev_warn(&device->cdev->dev, "FORMAT 0 - Channel Returned with " "Incorrect retry CCW\n"); break; case 0x08:
dev_warn(&device->cdev->dev, "FORMAT 0 - Reset Notification\n"); break; case 0x09:
dev_warn(&device->cdev->dev, "FORMAT 0 - Storage Path Restart\n"); break; case 0x0A:
dev_warn(&device->cdev->dev, "FORMAT 0 - Channel requested " "... %02x\n", sense[8]); break; case 0x0B:
dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Defective/" "Alternate Track Pointer\n"); break; case 0x0C:
dev_warn(&device->cdev->dev, "FORMAT 0 - DPS Installation " "Check\n"); break; case 0x0E:
dev_warn(&device->cdev->dev, "FORMAT 0 - Command Invalid on " "Secondary Address\n"); break; case 0x0F:
dev_warn(&device->cdev->dev, "FORMAT 0 - Status Not As " "Required: reason %02x\n",
sense[8]); break; default:
dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n");
}
} else { switch (msg_no) { case 0x00: /* No Message */ break; case 0x01:
dev_warn(&device->cdev->dev, "FORMAT 0 - Device Error " "Source\n"); break; case 0x02:
dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n"); break; case 0x03:
dev_warn(&device->cdev->dev, "FORMAT 0 - Device Fenced - " "device = %02x\n", sense[4]); break; case 0x04:
dev_warn(&device->cdev->dev, "FORMAT 0 - Data Pinned for " "Device\n"); break; default:
dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n");
}
} break;
case 0x10: /* Format 1 - Device Equipment Checks */ switch (msg_no) { case 0x00: /* No Message */ break; case 0x01:
dev_warn(&device->cdev->dev, "FORMAT 1 - Device Status 1 not as " "expected\n"); break; case 0x03:
dev_warn(&device->cdev->dev, "FORMAT 1 - Index missing\n"); break; case 0x04:
dev_warn(&device->cdev->dev, "FORMAT 1 - Interruption cannot be " "reset\n"); break; case 0x05:
dev_warn(&device->cdev->dev, "FORMAT 1 - Device did not respond to " "selection\n"); break; case 0x06:
dev_warn(&device->cdev->dev, "FORMAT 1 - Device check-2 error or Set " "Sector is not complete\n"); break; case 0x07:
dev_warn(&device->cdev->dev, "FORMAT 1 - Head address does not " "compare\n"); break; case 0x08:
dev_warn(&device->cdev->dev, "FORMAT 1 - Device status 1 not valid\n"); break; case 0x09:
dev_warn(&device->cdev->dev, "FORMAT 1 - Device not ready\n"); break; case 0x0A:
dev_warn(&device->cdev->dev, "FORMAT 1 - Track physical address did " "not compare\n"); break; case 0x0B:
dev_warn(&device->cdev->dev, "FORMAT 1 - Missing device address bit\n"); break; case 0x0C:
dev_warn(&device->cdev->dev, "FORMAT 1 - Drive motor switch is off\n"); break; case 0x0D:
dev_warn(&device->cdev->dev, "FORMAT 1 - Seek incomplete\n"); break; case 0x0E:
dev_warn(&device->cdev->dev, "FORMAT 1 - Cylinder address did not " "compare\n"); break; case 0x0F:
dev_warn(&device->cdev->dev, "FORMAT 1 - Offset active cannot be " "reset\n"); break; default:
dev_warn(&device->cdev->dev, "FORMAT 1 - Reserved\n");
} break;
case 0x20: /* Format 2 - 3990 Equipment Checks */ switch (msg_no) { case 0x08:
dev_warn(&device->cdev->dev, "FORMAT 2 - 3990 check-2 error\n"); break; case 0x0E:
dev_warn(&device->cdev->dev, "FORMAT 2 - Support facility errors\n"); break; case 0x0F:
dev_warn(&device->cdev->dev, "FORMAT 2 - Microcode detected error " "%02x\n",
sense[8]); break; default:
dev_warn(&device->cdev->dev, "FORMAT 2 - Reserved\n");
} break;
case 0x30: /* Format 3 - 3990 Control Checks */ switch (msg_no) { case 0x0F:
dev_warn(&device->cdev->dev, "FORMAT 3 - Allegiance terminated\n"); break; default:
dev_warn(&device->cdev->dev, "FORMAT 3 - Reserved\n");
} break;
case 0x40: /* Format 4 - Data Checks */ switch (msg_no) { case 0x00:
dev_warn(&device->cdev->dev, "FORMAT 4 - Home address area error\n"); break; case 0x01:
dev_warn(&device->cdev->dev, "FORMAT 4 - Count area error\n"); break; case 0x02:
dev_warn(&device->cdev->dev, "FORMAT 4 - Key area error\n"); break; case 0x03:
dev_warn(&device->cdev->dev, "FORMAT 4 - Data area error\n"); break; case 0x04:
dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in home address " "area\n"); break; case 0x05:
dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in count address " "area\n"); break; case 0x06:
dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in key area\n"); break; case 0x07:
dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in data area\n"); break; case 0x08:
dev_warn(&device->cdev->dev, "FORMAT 4 - Home address area error; " "offset active\n"); break; case 0x09:
dev_warn(&device->cdev->dev, "FORMAT 4 - Count area error; offset " "active\n"); break; case 0x0A:
dev_warn(&device->cdev->dev, "FORMAT 4 - Key area error; offset " "active\n"); break; case 0x0B:
dev_warn(&device->cdev->dev, "FORMAT 4 - Data area error; " "offset active\n"); break; case 0x0C:
dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in home " "address area; offset active\n"); break; case 0x0D:
dev_warn(&device->cdev->dev, "FORMAT 4 - No 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:
dev_err(&device->cdev->dev, "Unknown message format %02x", msg_format); break;
} /* end switch message format */
} /* end dasd_3990_handle_env_data */
/* * DASD_3990_ERP_COM_REJ * * DESCRIPTION * Handles 24 byte 'Command Reject' error. * * PARAMETER * erp current erp_head * sense current sense data * * RETURN VALUES * erp 'new' erp_head - pointer to new ERP
*/ staticstruct 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;
} elseif (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);
} elseif (sense[7] == SNS7_INVALID_ON_SEC) {
dev_err(&device->cdev->dev, "An I/O request was rejected on a copy pair secondary device\n"); /* suppress dump of sense data for this error */
set_bit(DASD_CQR_SUPPRESS_CR, &erp->refers->flags);
erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
} else { if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags))
dev_err(&device->cdev->dev, "An I/O command request was rejected\n");
/* * 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
*/ staticstruct 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");
/* * 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");
/* * 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
*/
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
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense)
{
/* * 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
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense)
{
/* * 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
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense)
{
/* 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");
/* 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
*/ staticstruct dasd_ccw_req *
dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense)
{
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) {
dev_err(&device->cdev->dev, "Unable to determine address of to be restarted CCW\n");
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;
} elseif ((sense[7] & 0x3F) == 0x03) { /* operation code is FORMAT WRITE -> index orientation */
LO_data[0] = 0xC3;
/* 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 *
*/ staticvoid
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 *
*/ staticvoid
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 *
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense)
{
if (sense[25] & DASD_SENSE_BIT_2) {
switch (sense[28]) { case 0x17: /* issue a Diagnostic Control command with an
* Inhibit Write subcommand and controller modifier */
erp = dasd_3990_erp_DCTL(erp, 0x20); break;
case 0x25: /* wait for 5 seconds and retry again */
erp->retries = 1;
dasd_3990_erp_block_queue (erp, 5*HZ); break;
default: /* should not happen - continue */ break;
}
}
erp->function = dasd_3990_erp_compound_code;
return erp;
} /* end dasd_3990_erp_compound_code */
/* * DASD_3990_ERP_COMPOUND_CONFIG * * DESCRIPTION * Handles the compound ERP action for configuration * dependent error. * Note: duplex handling is not implemented (yet). * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created ERP * * RETURN VALUES * erp modified ERP pointer *
*/ staticvoid
dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense)
{
/* * 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 *
*/ staticstruct 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]);
} elseif (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 *
*/ staticstruct 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");
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;
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
*/
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
*/ staticstruct 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 */ elseif (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
*/ staticstruct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr)
{
/* * 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
*/ staticstruct 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.
*/ staticint dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
{ char *sense1, *sense2;
/* 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.
*/ staticstruct 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
*/ staticstruct dasd_ccw_req *
dasd_3990_erp_further_erp(struct dasd_ccw_req *erp)
{
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