| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds | 5318 | 59.39% | 4 | 7.69% |
| Stefan Haberland | 1950 | 21.78% | 13 | 25.00% |
| Stefan Weinhuber | 831 | 9.28% | 10 | 19.23% |
| Martin Schwidefsky | 725 | 8.10% | 7 | 13.46% |
| Horst Hummel | 61 | 0.68% | 3 | 5.77% |
| Jan Höppner | 29 | 0.32% | 1 | 1.92% |
| Andrew Morton | 19 | 0.21% | 3 | 5.77% |
| Heiko Carstens | 5 | 0.06% | 2 | 3.85% |
| Peter Oberparleiter | 4 | 0.04% | 1 | 1.92% |
| Kay Sievers | 4 | 0.04% | 1 | 1.92% |
| Lucas De Marchi | 3 | 0.03% | 1 | 1.92% |
| Joe Perches | 1 | 0.01% | 1 | 1.92% |
| Stefan Weil | 1 | 0.01% | 1 | 1.92% |
| Geert Uytterhoeven | 1 | 0.01% | 1 | 1.92% |
| Robert P. J. Day | 1 | 0.01% | 1 | 1.92% |
| Coly Li | 1 | 0.01% | 1 | 1.92% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 1.92% |
| Total | 8955 | 52 |
// SPDX-License-Identifier: GPL-2.0 /* * Author(s)......: Horst Hummel <Horst.Hummel@de.ibm.com> * Holger Smolinski <Holger.Smolinski@de.ibm.com> * Bugreports.to..: <Linux390@de.ibm.com> * Copyright IBM Corp. 2000, 2001 * */ #define KMSG_COMPONENT "dasd-eckd" #include <linux/timer.h> #include <asm/idals.h> #define PRINTK_HEADER "dasd_erp(3990): " #include "dasd_int.h" #include "dasd_eckd.h" struct DCTL_data { unsigned char subcommand; /* e.g Inhibit Write, Enable Write,... */ unsigned char modifier; /* Subcommand modifier */ unsigned short res; /* reserved */ } __attribute__ ((packed)); /* ***************************************************************************** * SECTION ERP HANDLING ***************************************************************************** */ /* ***************************************************************************** * 24 and 32 byte sense ERP functions ***************************************************************************** */ /* * DASD_3990_ERP_CLEANUP * * DESCRIPTION * Removes the already build but not necessary ERP request and sets * the status of the original cqr / erp to the given (final) status * * PARAMETER * erp request to be blocked * final_status either DASD_CQR_DONE or DASD_CQR_FAILED * * RETURN VALUES * cqr original cqr */ static struct dasd_ccw_req * dasd_3990_erp_cleanup(struct dasd_ccw_req * erp, char final_status) { struct dasd_ccw_req *cqr = erp->refers; dasd_free_erp_request(erp, erp->memdev); cqr->status = final_status; return cqr; } /* end dasd_3990_erp_cleanup */ /* * DASD_3990_ERP_BLOCK_QUEUE * * DESCRIPTION * Block the given device request queue to prevent from further * processing until the started timer has expired or an related * interrupt was received. */ static void dasd_3990_erp_block_queue(struct dasd_ccw_req *erp, int expires) { struct dasd_device *device = erp->startdev; unsigned long flags; DBF_DEV_EVENT(DBF_INFO, device, "blocking request queue for %is", expires/HZ); spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); dasd_device_set_stop_bits(device, DASD_STOPPED_PENDING); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); erp->status = DASD_CQR_FILLED; if (erp->block) dasd_block_set_timer(erp->block, expires); else dasd_device_set_timer(device, expires); } /* * DASD_3990_ERP_INT_REQ * * DESCRIPTION * Handles 'Intervention Required' error. * This means either device offline or not installed. * * PARAMETER * erp current erp * RETURN VALUES * erp modified erp */ static struct dasd_ccw_req * dasd_3990_erp_int_req(struct dasd_ccw_req * erp) { struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without blocking queue */ /* (this enables easier enqueing of the cqr) */ if (erp->function != dasd_3990_erp_int_req) { erp->retries = 256; erp->function = dasd_3990_erp_int_req; } else { /* issue a message and wait for 'device ready' interrupt */ dev_err(&device->cdev->dev, "is offline or not installed - " "INTERVENTION REQUIRED!!\n"); dasd_3990_erp_block_queue(erp, 60*HZ); } return erp; } /* end dasd_3990_erp_int_req */ /* * DASD_3990_ERP_ALTERNATE_PATH * * DESCRIPTION * Repeat the operation on a different channel path. * If all alternate paths have been tried, the request is posted with a * permanent error. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp modified pointer to the ERP */ static void dasd_3990_erp_alternate_path(struct dasd_ccw_req * erp) { struct dasd_device *device = erp->startdev; __u8 opm; unsigned long flags; /* try alternate valid path */ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); opm = ccw_device_get_path_mask(device->cdev); spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); if (erp->lpm == 0) erp->lpm = dasd_path_get_opm(device) & ~(erp->irb.esw.esw0.sublog.lpum); else erp->lpm &= ~(erp->irb.esw.esw0.sublog.lpum); if ((erp->lpm & opm) != 0x00) { DBF_DEV_EVENT(DBF_WARNING, device, "try alternate lpm=%x (lpum=%x / opm=%x)", erp->lpm, erp->irb.esw.esw0.sublog.lpum, opm); /* reset status to submit the request again... */ erp->status = DASD_CQR_FILLED; erp->retries = 10; } else { dev_err(&device->cdev->dev, "The DASD cannot be reached on any path (lpum=%x" "/opm=%x)\n", erp->irb.esw.esw0.sublog.lpum, opm); /* post request with permanent error */ erp->status = DASD_CQR_FAILED; } } /* end dasd_3990_erp_alternate_path */ /* * DASD_3990_ERP_DCTL * * DESCRIPTION * Setup cqr to do the Diagnostic Control (DCTL) command with an * Inhibit Write subcommand (0x20) and the given modifier. * * PARAMETER * erp pointer to the current (failed) ERP * modifier subcommand modifier * * RETURN VALUES * dctl_cqr pointer to NEW dctl_cqr * */ static struct dasd_ccw_req * dasd_3990_erp_DCTL(struct dasd_ccw_req * erp, char modifier) { struct dasd_device *device = erp->startdev; struct DCTL_data *DCTL_data; struct ccw1 *ccw; struct dasd_ccw_req *dctl_cqr; dctl_cqr = dasd_alloc_erp_request(erp->magic, 1, sizeof(struct DCTL_data), device); if (IS_ERR(dctl_cqr)) { dev_err(&device->cdev->dev, "Unable to allocate DCTL-CQR\n"); erp->status = DASD_CQR_FAILED; return erp; } DCTL_data = dctl_cqr->data; DCTL_data->subcommand = 0x02; /* Inhibit Write */ DCTL_data->modifier = modifier; ccw = dctl_cqr->cpaddr; memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = CCW_CMD_DCTL; ccw->count = 4; ccw->cda = (__u32)(addr_t) DCTL_data; dctl_cqr->flags = erp->flags; dctl_cqr->function = dasd_3990_erp_DCTL; dctl_cqr->refers = erp; dctl_cqr->startdev = device; dctl_cqr->memdev = device; dctl_cqr->magic = erp->magic; dctl_cqr->expires = 5 * 60 * HZ; dctl_cqr->retries = 2; dctl_cqr->buildclk = get_tod_clock(); dctl_cqr->status = DASD_CQR_FILLED; return dctl_cqr; } /* end dasd_3990_erp_DCTL */ /* * DASD_3990_ERP_ACTION_1 * * DESCRIPTION * Setup ERP to do the ERP action 1 (see Reference manual). * Repeat the operation on a different channel path. * As deviation from the recommended recovery action, we reset the path mask * after we have tried each path and go through all paths a second time. * This will cover situations where only one path at a time is actually down, * but all paths fail and recover just with the same sequence and timing as * we try to use them (flapping links). * If all alternate paths have been tried twice, the request is posted with * a permanent error. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP * */ static struct dasd_ccw_req *dasd_3990_erp_action_1_sec(struct dasd_ccw_req *erp) { erp->function = dasd_3990_erp_action_1_sec; dasd_3990_erp_alternate_path(erp); return erp; } static struct dasd_ccw_req *dasd_3990_erp_action_1(struct dasd_ccw_req *erp) { erp->function = dasd_3990_erp_action_1; dasd_3990_erp_alternate_path(erp); if (erp->status == DASD_CQR_FAILED && !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { erp->status = DASD_CQR_FILLED; erp->retries = 10; erp->lpm = dasd_path_get_opm(erp->startdev); erp->function = dasd_3990_erp_action_1_sec; } return erp; } /* end dasd_3990_erp_action_1(b) */ /* * DASD_3990_ERP_ACTION_4 * * DESCRIPTION * Setup ERP to do the ERP action 4 (see Reference manual). * Set the current request to PENDING to block the CQR queue for that device * until the state change interrupt appears. * Use a timer (20 seconds) to retry the cqr if the interrupt is still * missing. * * PARAMETER * sense sense data of the actual error * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP * */ static struct dasd_ccw_req * dasd_3990_erp_action_4(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without waiting for state change pending */ /* interrupt (this enables easier enqueing of the cqr) */ if (erp->function != dasd_3990_erp_action_4) { DBF_DEV_EVENT(DBF_INFO, device, "%s", "dasd_3990_erp_action_4: first time retry"); erp->retries = 256; erp->function = dasd_3990_erp_action_4; } else { if (sense && (sense[25] == 0x1D)) { /* state change pending */ DBF_DEV_EVENT(DBF_INFO, device, "waiting for state change pending " "interrupt, %d retries left", erp->retries); dasd_3990_erp_block_queue(erp, 30*HZ); } else if (sense && (sense[25] == 0x1E)) { /* busy */ DBF_DEV_EVENT(DBF_INFO, device, "busy - redriving request later, " "%d retries left", erp->retries); dasd_3990_erp_block_queue(erp, HZ); } else { /* no state change pending - retry */ DBF_DEV_EVENT(DBF_INFO, device, "redriving request immediately, " "%d retries left", erp->retries); erp->status = DASD_CQR_FILLED; } } return erp; } /* end dasd_3990_erp_action_4 */ /* ***************************************************************************** * 24 byte sense ERP functions (only) ***************************************************************************** */ /* * DASD_3990_ERP_ACTION_5 * * DESCRIPTION * Setup ERP to do the ERP action 5 (see Reference manual). * NOTE: Further handling is done in xxx_further_erp after the retries. * * PARAMETER * erp pointer to the current ERP * * RETURN VALUES * erp pointer to the ERP * */ static struct dasd_ccw_req * dasd_3990_erp_action_5(struct dasd_ccw_req * erp) { /* first of all retry */ erp->retries = 10; erp->function = dasd_3990_erp_action_5; return erp; } /* end dasd_3990_erp_action_5 */ /* * DASD_3990_HANDLE_ENV_DATA * * DESCRIPTION * Handles 24 byte 'Environmental data present'. * Does a analysis of the sense data (message Format) * and prints the error messages. * * PARAMETER * sense current sense data * * RETURN VALUES * void */ static void dasd_3990_handle_env_data(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; char msg_format = (sense[7] & 0xF0); char msg_no = (sense[7] & 0x0F); char errorstring[ERRORLENGTH]; switch (msg_format) { case 0x00: /* Format 0 - Program or System Checks */ if (sense[1] & 0x10) { /* check message to operator bit */ switch (msg_no) { case 0x00: /* No Message */ break; case 0x01: dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Command\n"); break; case 0x02: dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Command " "Sequence\n"); break; case 0x03: dev_warn(&device->cdev->dev, "FORMAT 0 - CCW Count less than " "required\n"); break; case 0x04: dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Parameter\n"); break; case 0x05: dev_warn(&device->cdev->dev, "FORMAT 0 - Diagnostic of Special" " Command Violates File Mask\n"); break; case 0x07: dev_warn(&device->cdev->dev, "FORMAT 0 - Channel Returned with " "Incorrect retry CCW\n"); break; case 0x08: dev_warn(&device->cdev->dev, "FORMAT 0 - Reset Notification\n"); break; case 0x09: dev_warn(&device->cdev->dev, "FORMAT 0 - Storage Path Restart\n"); break; case 0x0A: dev_warn(&device->cdev->dev, "FORMAT 0 - Channel requested " "... %02x\n", sense[8]); break; case 0x0B: dev_warn(&device->cdev->dev, "FORMAT 0 - Invalid Defective/" "Alternate Track Pointer\n"); break; case 0x0C: dev_warn(&device->cdev->dev, "FORMAT 0 - DPS Installation " "Check\n"); break; case 0x0E: dev_warn(&device->cdev->dev, "FORMAT 0 - Command Invalid on " "Secondary Address\n"); break; case 0x0F: dev_warn(&device->cdev->dev, "FORMAT 0 - Status Not As " "Required: reason %02x\n", sense[8]); break; default: dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n"); } } else { switch (msg_no) { case 0x00: /* No Message */ break; case 0x01: dev_warn(&device->cdev->dev, "FORMAT 0 - Device Error " "Source\n"); break; case 0x02: dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n"); break; case 0x03: dev_warn(&device->cdev->dev, "FORMAT 0 - Device Fenced - " "device = %02x\n", sense[4]); break; case 0x04: dev_warn(&device->cdev->dev, "FORMAT 0 - Data Pinned for " "Device\n"); break; default: dev_warn(&device->cdev->dev, "FORMAT 0 - Reserved\n"); } } break; case 0x10: /* Format 1 - Device Equipment Checks */ switch (msg_no) { case 0x00: /* No Message */ break; case 0x01: dev_warn(&device->cdev->dev, "FORMAT 1 - Device Status 1 not as " "expected\n"); break; case 0x03: dev_warn(&device->cdev->dev, "FORMAT 1 - Index missing\n"); break; case 0x04: dev_warn(&device->cdev->dev, "FORMAT 1 - Interruption cannot be " "reset\n"); break; case 0x05: dev_warn(&device->cdev->dev, "FORMAT 1 - Device did not respond to " "selection\n"); break; case 0x06: dev_warn(&device->cdev->dev, "FORMAT 1 - Device check-2 error or Set " "Sector is not complete\n"); break; case 0x07: dev_warn(&device->cdev->dev, "FORMAT 1 - Head address does not " "compare\n"); break; case 0x08: dev_warn(&device->cdev->dev, "FORMAT 1 - Device status 1 not valid\n"); break; case 0x09: dev_warn(&device->cdev->dev, "FORMAT 1 - Device not ready\n"); break; case 0x0A: dev_warn(&device->cdev->dev, "FORMAT 1 - Track physical address did " "not compare\n"); break; case 0x0B: dev_warn(&device->cdev->dev, "FORMAT 1 - Missing device address bit\n"); break; case 0x0C: dev_warn(&device->cdev->dev, "FORMAT 1 - Drive motor switch is off\n"); break; case 0x0D: dev_warn(&device->cdev->dev, "FORMAT 1 - Seek incomplete\n"); break; case 0x0E: dev_warn(&device->cdev->dev, "FORMAT 1 - Cylinder address did not " "compare\n"); break; case 0x0F: dev_warn(&device->cdev->dev, "FORMAT 1 - Offset active cannot be " "reset\n"); break; default: dev_warn(&device->cdev->dev, "FORMAT 1 - Reserved\n"); } break; case 0x20: /* Format 2 - 3990 Equipment Checks */ switch (msg_no) { case 0x08: dev_warn(&device->cdev->dev, "FORMAT 2 - 3990 check-2 error\n"); break; case 0x0E: dev_warn(&device->cdev->dev, "FORMAT 2 - Support facility errors\n"); break; case 0x0F: dev_warn(&device->cdev->dev, "FORMAT 2 - Microcode detected error " "%02x\n", sense[8]); break; default: dev_warn(&device->cdev->dev, "FORMAT 2 - Reserved\n"); } break; case 0x30: /* Format 3 - 3990 Control Checks */ switch (msg_no) { case 0x0F: dev_warn(&device->cdev->dev, "FORMAT 3 - Allegiance terminated\n"); break; default: dev_warn(&device->cdev->dev, "FORMAT 3 - Reserved\n"); } break; case 0x40: /* Format 4 - Data Checks */ switch (msg_no) { case 0x00: dev_warn(&device->cdev->dev, "FORMAT 4 - Home address area error\n"); break; case 0x01: dev_warn(&device->cdev->dev, "FORMAT 4 - Count area error\n"); break; case 0x02: dev_warn(&device->cdev->dev, "FORMAT 4 - Key area error\n"); break; case 0x03: dev_warn(&device->cdev->dev, "FORMAT 4 - Data area error\n"); break; case 0x04: dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in home address " "area\n"); break; case 0x05: dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in count address " "area\n"); break; case 0x06: dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in key area\n"); break; case 0x07: dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in data area\n"); break; case 0x08: dev_warn(&device->cdev->dev, "FORMAT 4 - Home address area error; " "offset active\n"); break; case 0x09: dev_warn(&device->cdev->dev, "FORMAT 4 - Count area error; offset " "active\n"); break; case 0x0A: dev_warn(&device->cdev->dev, "FORMAT 4 - Key area error; offset " "active\n"); break; case 0x0B: dev_warn(&device->cdev->dev, "FORMAT 4 - Data area error; " "offset active\n"); break; case 0x0C: dev_warn(&device->cdev->dev, "FORMAT 4 - No sync byte in home " "address area; offset active\n"); break; case 0x0D: dev_warn(&device->cdev->dev, "FORMAT 4 - No 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 if (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 { /* fatal error - set status to FAILED internal error 09 - Command Reject */ if (!test_bit(DASD_CQR_SUPPRESS_CR, &erp->flags)) dev_err(&device->cdev->dev, "An error occurred in the DASD device driver, reason=09\n"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); } return erp; } /* end dasd_3990_erp_com_rej */ /* * DASD_3990_ERP_BUS_OUT * * DESCRIPTION * Handles 24 byte 'Bus Out Parity Check' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_bus_out(struct dasd_ccw_req * erp) { struct dasd_device *device = erp->startdev; /* first time set initial retry counter and erp_function */ /* and retry once without blocking queue */ /* (this enables easier enqueing of the cqr) */ if (erp->function != dasd_3990_erp_bus_out) { erp->retries = 256; erp->function = dasd_3990_erp_bus_out; } else { /* issue a message and wait for 'device ready' interrupt */ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "bus out parity error or BOPC requested by " "channel"); dasd_3990_erp_block_queue(erp, 60*HZ); } return erp; } /* end dasd_3990_erp_bus_out */ /* * DASD_3990_ERP_EQUIP_CHECK * * DESCRIPTION * Handles 24 byte 'Equipment Check' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_equip_check(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_equip_check; if (sense[1] & SNS1_WRITE_INHIBITED) { dev_info(&device->cdev->dev, "Write inhibited path encountered\n"); /* vary path offline internal error 04 - Path should be varied off-line.*/ dev_err(&device->cdev->dev, "An error occurred in the DASD " "device driver, reason=%s\n", "04"); erp = dasd_3990_erp_action_1(erp); } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Equipment Check - " "environmental data present"); dasd_3990_handle_env_data(erp, sense); erp = dasd_3990_erp_action_4(erp, sense); } else if (sense[1] & SNS1_PERM_ERR) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Equipment Check - retry exhausted or " "undesirable"); erp = dasd_3990_erp_action_1(erp); } else { /* all other equipment checks - Action 5 */ /* rest is done when retries == 0 */ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Equipment check or processing error"); erp = dasd_3990_erp_action_5(erp); } return erp; } /* end dasd_3990_erp_equip_check */ /* * DASD_3990_ERP_DATA_CHECK * * DESCRIPTION * Handles 24 byte 'Data Check' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_data_check(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_data_check; if (sense[2] & SNS2_CORRECTABLE) { /* correctable data check */ /* issue message that the data has been corrected */ dev_emerg(&device->cdev->dev, "Data recovered during retry with PCI " "fetch mode active\n"); /* not possible to handle this situation in Linux */ panic("No way to inform application about the possibly " "incorrect data"); } else if (sense[2] & SNS2_ENV_DATA_PRESENT) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Uncorrectable data check recovered secondary " "addr of duplex pair"); erp = dasd_3990_erp_action_4(erp, sense); } else if (sense[1] & SNS1_PERM_ERR) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Uncorrectable data check with internal " "retry exhausted"); erp = dasd_3990_erp_action_1(erp); } else { /* all other data checks */ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Uncorrectable data check with retry count " "exhausted..."); erp = dasd_3990_erp_action_5(erp); } return erp; } /* end dasd_3990_erp_data_check */ /* * DASD_3990_ERP_OVERRUN * * DESCRIPTION * Handles 24 byte 'Overrun' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_overrun(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_overrun; DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Overrun - service overrun or overrun" " error requested by channel"); erp = dasd_3990_erp_action_5(erp); return erp; } /* end dasd_3990_erp_overrun */ /* * DASD_3990_ERP_INV_FORMAT * * DESCRIPTION * Handles 24 byte 'Invalid Track Format' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_inv_format(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_inv_format; if (sense[2] & SNS2_ENV_DATA_PRESENT) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Track format error when destaging or " "staging data"); dasd_3990_handle_env_data(erp, sense); erp = dasd_3990_erp_action_4(erp, sense); } else { /* internal error 06 - The track format is not valid*/ dev_err(&device->cdev->dev, "An error occurred in the DASD device driver, " "reason=%s\n", "06"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); } return erp; } /* end dasd_3990_erp_inv_format */ /* * DASD_3990_ERP_EOC * * DESCRIPTION * Handles 24 byte 'End-of-Cylinder' error. * * PARAMETER * erp already added default erp * RETURN VALUES * erp pointer to original (failed) cqr. */ static struct dasd_ccw_req * dasd_3990_erp_EOC(struct dasd_ccw_req * default_erp, char *sense) { struct dasd_device *device = default_erp->startdev; dev_err(&device->cdev->dev, "The cylinder data for accessing the DASD is inconsistent\n"); /* implement action 7 - BUG */ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); } /* end dasd_3990_erp_EOC */ /* * DASD_3990_ERP_ENV_DATA * * DESCRIPTION * Handles 24 byte 'Environmental-Data Present' error. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_env_data(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_env_data; DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Environmental data present"); dasd_3990_handle_env_data(erp, sense); /* don't retry on disabled interface */ if (sense[7] != 0x0F) { erp = dasd_3990_erp_action_4(erp, sense); } else { erp->status = DASD_CQR_FILLED; } return erp; } /* end dasd_3990_erp_env_data */ /* * DASD_3990_ERP_NO_REC * * DESCRIPTION * Handles 24 byte 'No Record Found' error. * * PARAMETER * erp already added default ERP * * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_no_rec(struct dasd_ccw_req * default_erp, char *sense) { struct dasd_device *device = default_erp->startdev; /* * In some cases the 'No Record Found' error might be expected and * log messages shouldn't be written then. * Check if the according suppress bit is set. */ if (!test_bit(DASD_CQR_SUPPRESS_NRF, &default_erp->flags)) dev_err(&device->cdev->dev, "The specified record was not found\n"); return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); } /* end dasd_3990_erp_no_rec */ /* * DASD_3990_ERP_FILE_PROT * * DESCRIPTION * Handles 24 byte 'File Protected' error. * Note: Seek related recovery is not implemented because * wee don't use the seek command yet. * * PARAMETER * erp current erp_head * RETURN VALUES * erp new erp_head - pointer to new ERP */ static struct dasd_ccw_req * dasd_3990_erp_file_prot(struct dasd_ccw_req * erp) { struct dasd_device *device = erp->startdev; /* * In some cases the 'File Protected' error might be expected and * log messages shouldn't be written then. * Check if the according suppress bit is set. */ if (!test_bit(DASD_CQR_SUPPRESS_FP, &erp->flags)) dev_err(&device->cdev->dev, "Accessing the DASD failed because of a hardware error\n"); return dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); } /* end dasd_3990_erp_file_prot */ /* * DASD_3990_ERP_INSPECT_ALIAS * * DESCRIPTION * Checks if the original request was started on an alias device. * If yes, it modifies the original and the erp request so that * the erp request can be started on a base device. * * PARAMETER * erp pointer to the currently created default ERP * * RETURN VALUES * erp pointer to the modified ERP, or NULL */ static struct dasd_ccw_req *dasd_3990_erp_inspect_alias( struct dasd_ccw_req *erp) { struct dasd_ccw_req *cqr = erp->refers; char *sense; if (cqr->block && (cqr->block->base != cqr->startdev)) { sense = dasd_get_sense(&erp->refers->irb); /* * dynamic pav may have changed base alias mapping */ if (!test_bit(DASD_FLAG_OFFLINE, &cqr->startdev->flags) && sense && (sense[0] == 0x10) && (sense[7] == 0x0F) && (sense[8] == 0x67)) { /* * remove device from alias handling to prevent new * requests from being scheduled on the * wrong alias device */ dasd_alias_remove_device(cqr->startdev); /* schedule worker to reload device */ dasd_reload_device(cqr->startdev); } if (cqr->startdev->features & DASD_FEATURE_ERPLOG) { DBF_DEV_EVENT(DBF_ERR, cqr->startdev, "ERP on alias device for request %p," " recover on base device %s", cqr, dev_name(&cqr->block->base->cdev->dev)); } dasd_eckd_reset_ccw_to_base_io(cqr); erp->startdev = cqr->block->base; erp->function = dasd_3990_erp_inspect_alias; return erp; } else return NULL; } /* * DASD_3990_ERP_INSPECT_24 * * DESCRIPTION * Does a detailed inspection of the 24 byte sense data * and sets up a related error recovery action. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created default ERP * * RETURN VALUES * erp pointer to the (addtitional) ERP */ static struct dasd_ccw_req * dasd_3990_erp_inspect_24(struct dasd_ccw_req * erp, char *sense) { struct dasd_ccw_req *erp_filled = NULL; /* Check sense for .... */ /* 'Command Reject' */ if ((erp_filled == NULL) && (sense[0] & SNS0_CMD_REJECT)) { erp_filled = dasd_3990_erp_com_rej(erp, sense); } /* 'Intervention Required' */ if ((erp_filled == NULL) && (sense[0] & SNS0_INTERVENTION_REQ)) { erp_filled = dasd_3990_erp_int_req(erp); } /* 'Bus Out Parity Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_BUS_OUT_CHECK)) { erp_filled = dasd_3990_erp_bus_out(erp); } /* 'Equipment Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_EQUIPMENT_CHECK)) { erp_filled = dasd_3990_erp_equip_check(erp, sense); } /* 'Data Check' */ if ((erp_filled == NULL) && (sense[0] & SNS0_DATA_CHECK)) { erp_filled = dasd_3990_erp_data_check(erp, sense); } /* 'Overrun' */ if ((erp_filled == NULL) && (sense[0] & SNS0_OVERRUN)) { erp_filled = dasd_3990_erp_overrun(erp, sense); } /* 'Invalid Track Format' */ if ((erp_filled == NULL) && (sense[1] & SNS1_INV_TRACK_FORMAT)) { erp_filled = dasd_3990_erp_inv_format(erp, sense); } /* 'End-of-Cylinder' */ if ((erp_filled == NULL) && (sense[1] & SNS1_EOC)) { erp_filled = dasd_3990_erp_EOC(erp, sense); } /* 'Environmental Data' */ if ((erp_filled == NULL) && (sense[2] & SNS2_ENV_DATA_PRESENT)) { erp_filled = dasd_3990_erp_env_data(erp, sense); } /* 'No Record Found' */ if ((erp_filled == NULL) && (sense[1] & SNS1_NO_REC_FOUND)) { erp_filled = dasd_3990_erp_no_rec(erp, sense); } /* 'File Protected' */ if ((erp_filled == NULL) && (sense[1] & SNS1_FILE_PROTECTED)) { erp_filled = dasd_3990_erp_file_prot(erp); } /* other (unknown) error - do default ERP */ if (erp_filled == NULL) { erp_filled = erp; } return erp_filled; } /* END dasd_3990_erp_inspect_24 */ /* ***************************************************************************** * 32 byte sense ERP functions (only) ***************************************************************************** */ /* * DASD_3990_ERPACTION_10_32 * * DESCRIPTION * Handles 32 byte 'Action 10' of Single Program Action Codes. * Just retry and if retry doesn't work, return with error. * * PARAMETER * erp current erp_head * sense current sense data * RETURN VALUES * erp modified erp_head */ static struct dasd_ccw_req * dasd_3990_erp_action_10_32(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->retries = 256; erp->function = dasd_3990_erp_action_10_32; DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Perform logging requested"); return erp; } /* end dasd_3990_erp_action_10_32 */ /* * DASD_3990_ERP_ACTION_1B_32 * * DESCRIPTION * Handles 32 byte 'Action 1B' of Single Program Action Codes. * A write operation could not be finished because of an unexpected * condition. * The already created 'default erp' is used to get the link to * the erp chain, but it can not be used for this recovery * action because it contains no DE/LO data space. * * PARAMETER * default_erp already added default erp. * sense current sense data * * RETURN VALUES * erp new erp or * default_erp in case of imprecise ending or error */ static struct dasd_ccw_req * dasd_3990_erp_action_1B_32(struct dasd_ccw_req * default_erp, char *sense) { struct dasd_device *device = default_erp->startdev; __u32 cpa = 0; struct dasd_ccw_req *cqr; struct dasd_ccw_req *erp; struct DE_eckd_data *DE_data; struct PFX_eckd_data *PFX_data; char *LO_data; /* LO_eckd_data_t */ struct ccw1 *ccw, *oldccw; DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Write not finished because of unexpected condition"); default_erp->function = dasd_3990_erp_action_1B_32; /* determine the original cqr */ cqr = default_erp; while (cqr->refers != NULL) { cqr = cqr->refers; } if (scsw_is_tm(&cqr->irb.scsw)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "32 bit sense, action 1B is not defined" " in transport mode - just retry"); return default_erp; } /* for imprecise ending just do default erp */ if (sense[1] & 0x01) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Imprecise ending is set - just retry"); return default_erp; } /* determine the address of the CCW to be restarted */ /* Imprecise ending is not set -> addr from IRB-SCSW */ cpa = default_erp->refers->irb.scsw.cmd.cpa; if (cpa == 0) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Unable to determine address of the CCW " "to be restarted"); return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); } /* Build new ERP request including DE/LO */ erp = dasd_alloc_erp_request(cqr->magic, 2 + 1,/* DE/LO + TIC */ sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data), device); if (IS_ERR(erp)) { /* internal error 01 - Unable to allocate ERP */ dev_err(&device->cdev->dev, "An error occurred in the DASD " "device driver, reason=%s\n", "01"); return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); } /* use original DE */ DE_data = erp->data; oldccw = cqr->cpaddr; if (oldccw->cmd_code == DASD_ECKD_CCW_PFX) { PFX_data = cqr->data; memcpy(DE_data, &PFX_data->define_extent, sizeof(struct DE_eckd_data)); } else memcpy(DE_data, cqr->data, sizeof(struct DE_eckd_data)); /* create LO */ LO_data = erp->data + sizeof(struct DE_eckd_data); if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { /* should not */ return dasd_3990_erp_cleanup(default_erp, DASD_CQR_FAILED); } if ((sense[7] & 0x3F) == 0x01) { /* operation code is WRITE DATA -> data area orientation */ LO_data[0] = 0x81; } else if ((sense[7] & 0x3F) == 0x03) { /* operation code is FORMAT WRITE -> index orientation */ LO_data[0] = 0xC3; } else { LO_data[0] = sense[7]; /* operation */ } LO_data[1] = sense[8]; /* auxiliary */ LO_data[2] = sense[9]; LO_data[3] = sense[3]; /* count */ LO_data[4] = sense[29]; /* seek_addr.cyl */ LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ memcpy(&(LO_data[8]), &(sense[11]), 8); /* create DE ccw */ ccw = erp->cpaddr; memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; ccw->flags = CCW_FLAG_CC; ccw->count = 16; ccw->cda = (__u32)(addr_t) DE_data; /* create LO ccw */ ccw++; memset(ccw, 0, sizeof(struct ccw1)); ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; ccw->flags = CCW_FLAG_CC; ccw->count = 16; ccw->cda = (__u32)(addr_t) LO_data; /* TIC to the failed ccw */ ccw++; ccw->cmd_code = CCW_CMD_TIC; ccw->cda = cpa; /* fill erp related fields */ erp->flags = default_erp->flags; erp->function = dasd_3990_erp_action_1B_32; erp->refers = default_erp->refers; erp->startdev = device; erp->memdev = device; erp->magic = default_erp->magic; erp->expires = default_erp->expires; erp->retries = 256; erp->buildclk = get_tod_clock(); erp->status = DASD_CQR_FILLED; /* remove the default erp */ dasd_free_erp_request(default_erp, device); return erp; } /* end dasd_3990_erp_action_1B_32 */ /* * DASD_3990_UPDATE_1B * * DESCRIPTION * Handles the update to the 32 byte 'Action 1B' of Single Program * Action Codes in case the first action was not successful. * The already created 'previous_erp' is the currently not successful * ERP. * * PARAMETER * previous_erp already created previous erp. * sense current sense data * RETURN VALUES * erp modified erp */ static struct dasd_ccw_req * dasd_3990_update_1B(struct dasd_ccw_req * previous_erp, char *sense) { struct dasd_device *device = previous_erp->startdev; __u32 cpa = 0; struct dasd_ccw_req *cqr; struct dasd_ccw_req *erp; char *LO_data; /* struct LO_eckd_data */ struct ccw1 *ccw; DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Write not finished because of unexpected condition" " - follow on"); /* determine the original cqr */ cqr = previous_erp; while (cqr->refers != NULL) { cqr = cqr->refers; } if (scsw_is_tm(&cqr->irb.scsw)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "32 bit sense, action 1B, update," " in transport mode - just retry"); return previous_erp; } /* for imprecise ending just do default erp */ if (sense[1] & 0x01) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Imprecise ending is set - just retry"); previous_erp->status = DASD_CQR_FILLED; return previous_erp; } /* determine the address of the CCW to be restarted */ /* Imprecise ending is not set -> addr from IRB-SCSW */ cpa = previous_erp->irb.scsw.cmd.cpa; if (cpa == 0) { /* internal error 02 - Unable to determine address of the CCW to be restarted */ dev_err(&device->cdev->dev, "An error occurred in the DASD " "device driver, reason=%s\n", "02"); previous_erp->status = DASD_CQR_FAILED; return previous_erp; } erp = previous_erp; /* update the LO with the new returned sense data */ LO_data = erp->data + sizeof(struct DE_eckd_data); if ((sense[3] == 0x01) && (LO_data[1] & 0x01)) { /* should not happen */ previous_erp->status = DASD_CQR_FAILED; return previous_erp; } if ((sense[7] & 0x3F) == 0x01) { /* operation code is WRITE DATA -> data area orientation */ LO_data[0] = 0x81; } else if ((sense[7] & 0x3F) == 0x03) { /* operation code is FORMAT WRITE -> index orientation */ LO_data[0] = 0xC3; } else { LO_data[0] = sense[7]; /* operation */ } LO_data[1] = sense[8]; /* auxiliary */ LO_data[2] = sense[9]; LO_data[3] = sense[3]; /* count */ LO_data[4] = sense[29]; /* seek_addr.cyl */ LO_data[5] = sense[30]; /* seek_addr.cyl 2nd byte */ LO_data[7] = sense[31]; /* seek_addr.head 2nd byte */ memcpy(&(LO_data[8]), &(sense[11]), 8); /* TIC to the failed ccw */ ccw = erp->cpaddr; /* addr of DE ccw */ ccw++; /* addr of LE ccw */ ccw++; /* addr of TIC ccw */ ccw->cda = cpa; erp->status = DASD_CQR_FILLED; return erp; } /* end dasd_3990_update_1B */ /* * DASD_3990_ERP_COMPOUND_RETRY * * DESCRIPTION * Handles the compound ERP action retry code. * NOTE: At least one retry is done even if zero is specified * by the sense data. This makes enqueueing of the request * easier. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created ERP * * RETURN VALUES * erp modified ERP pointer * */ static void dasd_3990_erp_compound_retry(struct dasd_ccw_req * erp, char *sense) { switch (sense[25] & 0x03) { case 0x00: /* no not retry */ erp->retries = 1; break; case 0x01: /* retry 2 times */ erp->retries = 2; break; case 0x02: /* retry 10 times */ erp->retries = 10; break; case 0x03: /* retry 256 times */ erp->retries = 256; break; default: BUG(); } erp->function = dasd_3990_erp_compound_retry; } /* end dasd_3990_erp_compound_retry */ /* * DASD_3990_ERP_COMPOUND_PATH * * DESCRIPTION * Handles the compound ERP action for retry on alternate * channel path. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created ERP * * RETURN VALUES * erp modified ERP pointer * */ static void dasd_3990_erp_compound_path(struct dasd_ccw_req * erp, char *sense) { if (sense[25] & DASD_SENSE_BIT_3) { dasd_3990_erp_alternate_path(erp); if (erp->status == DASD_CQR_FAILED && !test_bit(DASD_CQR_VERIFY_PATH, &erp->flags)) { /* reset the lpm and the status to be able to * try further actions. */ erp->lpm = dasd_path_get_opm(erp->startdev); erp->status = DASD_CQR_NEED_ERP; } } erp->function = dasd_3990_erp_compound_path; } /* end dasd_3990_erp_compound_path */ /* * DASD_3990_ERP_COMPOUND_CODE * * DESCRIPTION * Handles the compound ERP action for retry code. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created ERP * * RETURN VALUES * erp NEW ERP pointer * */ static struct dasd_ccw_req * dasd_3990_erp_compound_code(struct dasd_ccw_req * erp, char *sense) { if (sense[25] & DASD_SENSE_BIT_2) { switch (sense[28]) { case 0x17: /* issue a Diagnostic Control command with an * Inhibit Write subcommand and controller modifier */ erp = dasd_3990_erp_DCTL(erp, 0x20); break; case 0x25: /* wait for 5 seconds and retry again */ erp->retries = 1; dasd_3990_erp_block_queue (erp, 5*HZ); break; default: /* should not happen - continue */ break; } } erp->function = dasd_3990_erp_compound_code; return erp; } /* end dasd_3990_erp_compound_code */ /* * DASD_3990_ERP_COMPOUND_CONFIG * * DESCRIPTION * Handles the compound ERP action for configuration * dependent error. * Note: duplex handling is not implemented (yet). * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created ERP * * RETURN VALUES * erp modified ERP pointer * */ static void dasd_3990_erp_compound_config(struct dasd_ccw_req * erp, char *sense) { if ((sense[25] & DASD_SENSE_BIT_1) && (sense[26] & DASD_SENSE_BIT_2)) { /* set to suspended duplex state then restart internal error 05 - Set device to suspended duplex state should be done */ struct dasd_device *device = erp->startdev; dev_err(&device->cdev->dev, "An error occurred in the DASD device driver, " "reason=%s\n", "05"); } erp->function = dasd_3990_erp_compound_config; } /* end dasd_3990_erp_compound_config */ /* * DASD_3990_ERP_COMPOUND * * DESCRIPTION * Does the further compound program action if * compound retry was not successful. * * PARAMETER * sense sense data of the actual error * erp pointer to the current (failed) ERP * * RETURN VALUES * erp (additional) ERP pointer * */ static struct dasd_ccw_req * dasd_3990_erp_compound(struct dasd_ccw_req * erp, char *sense) { if ((erp->function == dasd_3990_erp_compound_retry) && (erp->status == DASD_CQR_NEED_ERP)) { dasd_3990_erp_compound_path(erp, sense); } if ((erp->function == dasd_3990_erp_compound_path) && (erp->status == DASD_CQR_NEED_ERP)) { erp = dasd_3990_erp_compound_code(erp, sense); } if ((erp->function == dasd_3990_erp_compound_code) && (erp->status == DASD_CQR_NEED_ERP)) { dasd_3990_erp_compound_config(erp, sense); } /* if no compound action ERP specified, the request failed */ if (erp->status == DASD_CQR_NEED_ERP) erp->status = DASD_CQR_FAILED; return erp; } /* end dasd_3990_erp_compound */ /* *DASD_3990_ERP_HANDLE_SIM * *DESCRIPTION * inspects the SIM SENSE data and starts an appropriate action * * PARAMETER * sense sense data of the actual error * * RETURN VALUES * none */ void dasd_3990_erp_handle_sim(struct dasd_device *device, char *sense) { /* print message according to log or message to operator mode */ if ((sense[24] & DASD_SIM_MSG_TO_OP) || (sense[1] & 0x10)) { /* print SIM SRC from RefCode */ dev_err(&device->cdev->dev, "SIM - SRC: " "%02x%02x%02x%02x\n", sense[22], sense[23], sense[11], sense[12]); } else if (sense[24] & DASD_SIM_LOG) { /* print SIM SRC Refcode */ dev_warn(&device->cdev->dev, "log SIM - SRC: " "%02x%02x%02x%02x\n", sense[22], sense[23], sense[11], sense[12]); } } /* * DASD_3990_ERP_INSPECT_32 * * DESCRIPTION * Does a detailed inspection of the 32 byte sense data * and sets up a related error recovery action. * * PARAMETER * sense sense data of the actual error * erp pointer to the currently created default ERP * * RETURN VALUES * erp_filled pointer to the ERP * */ static struct dasd_ccw_req * dasd_3990_erp_inspect_32(struct dasd_ccw_req * erp, char *sense) { struct dasd_device *device = erp->startdev; erp->function = dasd_3990_erp_inspect_32; /* check for SIM sense data */ if ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE) dasd_3990_erp_handle_sim(device, sense); if (sense[25] & DASD_SENSE_BIT_0) { /* compound program action codes (byte25 bit 0 == '1') */ dasd_3990_erp_compound_retry(erp, sense); } else { /* single program action codes (byte25 bit 0 == '0') */ switch (sense[25]) { case 0x00: /* success - use default ERP for retries */ DBF_DEV_EVENT(DBF_DEBUG, device, "%s", "ERP called for successful request" " - just retry"); break; case 0x01: /* fatal error */ dev_err(&device->cdev->dev, "ERP failed for the DASD\n"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); break; case 0x02: /* intervention required */ case 0x03: /* intervention required during dual copy */ erp = dasd_3990_erp_int_req(erp); break; case 0x0F: /* length mismatch during update write command internal error 08 - update write command error*/ dev_err(&device->cdev->dev, "An error occurred in the " "DASD device driver, reason=%s\n", "08"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); break; case 0x10: /* logging required for other channel program */ erp = dasd_3990_erp_action_10_32(erp, sense); break; case 0x15: /* next track outside defined extend internal error 07 - The next track is not within the defined storage extent */ dev_err(&device->cdev->dev, "An error occurred in the DASD device driver, " "reason=%s\n", "07"); erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED); break; case 0x1B: /* unexpected condition during write */ erp = dasd_3990_erp_action_1B_32(erp, sense); break; case 0x1C: /* invalid data */ dev_emerg(&device->cdev->dev, "Data recovered during retry with PCI " "fetch mode active\n"); /* not possible to handle this situation in Linux */ panic ("Invalid data - No way to inform application " "about the possibly incorrect data"); break; case 0x1D: /* state-change pending */ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "A State change pending condition exists " "for the subsystem or device"); erp = dasd_3990_erp_action_4(erp, sense); break; case 0x1E: /* busy */ DBF_DEV_EVENT(DBF_WARNING, device, "%s", "Busy condition exists " "for the subsystem or device"); erp = dasd_3990_erp_action_4(erp, sense); break; default: /* all others errors - default erp */ break; } } return erp; } /* end dasd_3990_erp_inspect_32 */ static void dasd_3990_erp_disable_path(struct dasd_device *device, __u8 lpum) { int pos = pathmask_to_pos(lpum); if (!(device->features & DASD_FEATURE_PATH_AUTODISABLE)) { dev_err(&device->cdev->dev, "Path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", device->path[pos].cssid, device->path[pos].chpid, lpum); goto out; } /* no remaining path, cannot disable */ if (!(dasd_path_get_opm(device) & ~lpum)) { dev_err(&device->cdev->dev, "Last path %x.%02x (pathmask %02x) is operational despite excessive IFCCs\n", device->path[pos].cssid, device->path[pos].chpid, lpum); goto out; } dev_err(&device->cdev->dev, "Path %x.%02x (pathmask %02x) is disabled - IFCC threshold exceeded\n", device->path[pos].cssid, device->path[pos].chpid, lpum); dasd_path_remove_opm(device, lpum); dasd_path_add_ifccpm(device, lpum); out: device->path[pos].errorclk = 0; atomic_set(&device->path[pos].error_count, 0); } static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp) { struct dasd_device *device = erp->startdev; __u8 lpum = erp->refers->irb.esw.esw1.lpum; int pos = pathmask_to_pos(lpum); unsigned long clk; if (!device->path_thrhld) return; clk = get_tod_clock(); /* * check if the last error is longer ago than the timeout, * if so reset error state */ if ((tod_to_ns(clk - device->path[pos].errorclk) / NSEC_PER_SEC) >= device->path_interval) { atomic_set(&device->path[pos].error_count, 0); device->path[pos].errorclk = 0; } atomic_inc(&device->path[pos].error_count); device->path[pos].errorclk = clk; /* threshold exceeded disable path if possible */ if (atomic_read(&device->path[pos].error_count) >= device->path_thrhld) dasd_3990_erp_disable_path(device, lpum); } /* ***************************************************************************** * main ERP control functions (24 and 32 byte sense) ***************************************************************************** */ /* * DASD_3990_ERP_CONTROL_CHECK * * DESCRIPTION * Does a generic inspection if a control check occurred and sets up * the related error recovery procedure * * PARAMETER * erp pointer to the currently created default ERP * * RETURN VALUES * erp_filled pointer to the erp */ static struct dasd_ccw_req * dasd_3990_erp_control_check(struct dasd_ccw_req *erp) { struct dasd_device *device = erp->startdev; if (scsw_cstat(&erp->refers->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | SCHN_STAT_CHN_CTRL_CHK)) { DBF_DEV_EVENT(DBF_WARNING, device, "%s", "channel or interface control check"); dasd_3990_erp_account_error(erp); erp = dasd_3990_erp_action_4(erp, NULL); } return erp; } /* * DASD_3990_ERP_INSPECT * * DESCRIPTION * Does a detailed inspection for sense data by calling either * the 24-byte or the 32-byte inspection routine. * * PARAMETER * erp pointer to the currently created default ERP * RETURN VALUES * erp_new contens was possibly modified */ static struct dasd_ccw_req * dasd_3990_erp_inspect(struct dasd_ccw_req *erp) { struct dasd_ccw_req *erp_new = NULL; char *sense; /* if this problem occurred on an alias retry on base */ erp_new = dasd_3990_erp_inspect_alias(erp); if (erp_new) return erp_new; /* sense data are located in the refers record of the * already set up new ERP ! * check if concurrent sens is available */ sense = dasd_get_sense(&erp->refers->irb); if (!sense) erp_new = dasd_3990_erp_control_check(erp); /* distinguish between 24 and 32 byte sense data */ else if (sense[27] & DASD_SENSE_BIT_0) { /* inspect the 24 byte sense data */ erp_new = dasd_3990_erp_inspect_24(erp, sense); } else { /* inspect the 32 byte sense data */ erp_new = dasd_3990_erp_inspect_32(erp, sense); } /* end distinguish between 24 and 32 byte sense data */ return erp_new; } /* * DASD_3990_ERP_ADD_ERP * * DESCRIPTION * This function adds an additional request block (ERP) to the head of * the given cqr (or erp). * For a command mode cqr the erp is initialized as an default erp * (retry TIC). * For transport mode we make a copy of the original TCW (points to * the original TCCB, TIDALs, etc.) but give it a fresh * TSB so the original sense data will not be changed. * * PARAMETER * cqr head of the current ERP-chain (or single cqr if * first error) * RETURN VALUES * erp pointer to new ERP-chain head */ static struct dasd_ccw_req *dasd_3990_erp_add_erp(struct dasd_ccw_req *cqr) { struct dasd_device *device = cqr->startdev; struct ccw1 *ccw; struct dasd_ccw_req *erp; int cplength, datasize; struct tcw *tcw; struct tsb *tsb; if (cqr->cpmode == 1) { cplength = 0; /* TCW needs to be 64 byte aligned, so leave enough room */ datasize = 64 + sizeof(struct tcw) + sizeof(struct tsb); } else { cplength = 2; datasize = 0; } /* allocate additional request block */ erp = dasd_alloc_erp_request(cqr->magic, cplength, datasize, device); if (IS_ERR(erp)) { if (cqr->retries <= 0) { DBF_DEV_EVENT(DBF_ERR, device, "%s", "Unable to allocate ERP request"); cqr->status = DASD_CQR_FAILED; cqr->stopclk = get_tod_clock(); } else { DBF_DEV_EVENT(DBF_ERR, device, "Unable to allocate ERP request " "(%i retries left)", cqr->retries); dasd_block_set_timer(device->block, (HZ << 3)); } return erp; } ccw = cqr->cpaddr; if (cqr->cpmode == 1) { /* make a shallow copy of the original tcw but set new tsb */ erp->cpmode = 1; erp->cpaddr = PTR_ALIGN(erp->data, 64); tcw = erp->cpaddr; tsb = (struct tsb *) &tcw[1]; *tcw = *((struct tcw *)cqr->cpaddr); tcw->tsb = (long)tsb; } else if (ccw->cmd_code == DASD_ECKD_CCW_PSF) { /* PSF cannot be chained from NOOP/TIC */ erp->cpaddr = cqr->cpaddr; } else { /* initialize request with default TIC to current ERP/CQR */ ccw = erp->cpaddr; ccw->cmd_code = CCW_CMD_NOOP; ccw->flags = CCW_FLAG_CC; ccw++; ccw->cmd_code = CCW_CMD_TIC; ccw->cda = (long)(cqr->cpaddr); } erp->flags = cqr->flags; erp->function = dasd_3990_erp_add_erp; erp->refers = cqr; erp->startdev = device; erp->memdev = device; erp->block = cqr->block; erp->magic = cqr->magic; erp->expires = cqr->expires; erp->retries = 256; erp->buildclk = get_tod_clock(); erp->status = DASD_CQR_FILLED; return erp; } /* * DASD_3990_ERP_ADDITIONAL_ERP * * DESCRIPTION * An additional ERP is needed to handle the current error. * Add ERP to the head of the ERP-chain containing the ERP processing * determined based on the sense data. * * PARAMETER * cqr head of the current ERP-chain (or single cqr if * first error) * * RETURN VALUES * erp pointer to new ERP-chain head */ static struct dasd_ccw_req * dasd_3990_erp_additional_erp(struct dasd_ccw_req * cqr) { struct dasd_ccw_req *erp = NULL; /* add erp and initialize with default TIC */ erp = dasd_3990_erp_add_erp(cqr); if (IS_ERR(erp)) return erp; /* inspect sense, determine specific ERP if possible */ if (erp != cqr) { erp = dasd_3990_erp_inspect(erp); } return erp; } /* end dasd_3990_erp_additional_erp */ /* * DASD_3990_ERP_ERROR_MATCH * * DESCRIPTION * Check if the device status of the given cqr is the same. * This means that the failed CCW and the relevant sense data * must match. * I don't distinguish between 24 and 32 byte sense because in case of * 24 byte sense byte 25 and 27 is set as well. * * PARAMETER * cqr1 first cqr, which will be compared with the * cqr2 second cqr. * * RETURN VALUES * match 'boolean' for match found * returns 1 if match found, otherwise 0. */ static int dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2) { char *sense1, *sense2; if (cqr1->startdev != cqr2->startdev) return 0; sense1 = dasd_get_sense(&cqr1->irb); sense2 = dasd_get_sense(&cqr2->irb); /* one request has sense data, the other not -> no match, return 0 */ if (!sense1 != !sense2) return 0; /* no sense data in both cases -> check cstat for IFCC */ if (!sense1 && !sense2) { if ((scsw_cstat(&cqr1->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | SCHN_STAT_CHN_CTRL_CHK)) == (scsw_cstat(&cqr2->irb.scsw) & (SCHN_STAT_INTF_CTRL_CHK | SCHN_STAT_CHN_CTRL_CHK))) return 1; /* match with ifcc*/ } /* check sense data; byte 0-2,25,27 */ if (!(sense1 && sense2 && (memcmp(sense1, sense2, 3) == 0) && (sense1[27] == sense2[27]) && (sense1[25] == sense2[25]))) { return 0; /* sense doesn't match */ } return 1; /* match */ } /* end dasd_3990_erp_error_match */ /* * DASD_3990_ERP_IN_ERP * * DESCRIPTION * check if the current error already happened before. * quick exit if current cqr is not an ERP (cqr->refers=NULL) * * PARAMETER * cqr failed cqr (either original cqr or already an erp) * * RETURN VALUES * erp erp-pointer to the already defined error * recovery procedure OR * NULL if a 'new' error occurred. */ static struct dasd_ccw_req * dasd_3990_erp_in_erp(struct dasd_ccw_req *cqr) { struct dasd_ccw_req *erp_head = cqr, /* save erp chain head */ *erp_match = NULL; /* save erp chain head */ int match = 0; /* 'boolean' for matching error found */ if (cqr->refers == NULL) { /* return if not in erp */ return NULL; } /* check the erp/cqr chain for current error */ do { match = dasd_3990_erp_error_match(erp_head, cqr->refers); erp_match = cqr; /* save possible matching erp */ cqr = cqr->refers; /* check next erp/cqr in queue */ } while ((cqr->refers != NULL) && (!match)); if (!match) { return NULL; /* no match was found */ } return erp_match; /* return address of matching erp */ } /* END dasd_3990_erp_in_erp */ /* * DASD_3990_ERP_FURTHER_ERP (24 & 32 byte sense) * * DESCRIPTION * No retry is left for the current ERP. Check what has to be done * with the ERP. * - do further defined ERP action or * - wait for interrupt or * - exit with permanent error * * PARAMETER * erp ERP which is in progress with no retry left * * RETURN VALUES * erp modified/additional ERP */ static struct dasd_ccw_req * dasd_3990_erp_further_erp(struct dasd_ccw_req *erp) { struct dasd_device *device = erp->startdev; char *sense = dasd_get_sense(&erp->irb); /* check for 24 byte sense ERP */ if ((erp->function == dasd_3990_erp_bus_out) || (erp->function == dasd_3990_erp_action_1) || (erp->function == dasd_3990_erp_action_4)) { erp = dasd_3990_erp_action_1(erp); } else if (erp->function == dasd_3990_erp_action_1_sec) { erp = dasd_3990_erp_action_1_sec(erp); } else if (erp->function == dasd_3990_erp_action_5) { /* retries have not been successful */ /* prepare erp for retry on different channel path */ erp = dasd_3990_erp_action_1(erp); if (sense && !(sense[2] & DASD_SENSE_BIT_0)) { /* issue a Diagnostic Control command with an * Inhibit Write subcommand */ switch (sense[25]) { case 0x17: case 0x57:{ /* controller */ erp = dasd_3990_erp_DCTL(erp, 0x20); break; } case 0x18: case 0x58:{ /* channel path */ erp = dasd_3990_erp_DCTL(erp, 0x40); break; } case 0x19: case 0x59:{ /* storage director */ erp = dasd_3990_erp_DCTL(erp, 0x80); break; } default: DBF_DEV_EVENT(DBF_WARNING, device, "invalid subcommand modifier 0x%x " "for Diagnostic Control Command", sense[25]); } } /* check for 32 byte sense ERP */ } else if (sense && ((erp->function == dasd_3990_erp_compound_retry) || (erp->function == dasd_3990_erp_compound_path) || (erp->function == dasd_3990_erp_compound_code) || (erp->function == dasd_3990_erp_compound_config))) { erp = dasd_3990_erp_compound(erp, sense); } else { /* * No retry left and no additional special handling * necessary */ dev_err(&device->cdev->dev, "ERP %p has run out of retries and failed\n", erp); erp->status = DASD_CQR_FAILED; } return erp; } /* end dasd_3990_erp_further_erp */ /* * DASD_3990_ERP_HANDLE_MATCH_ERP * * DESCRIPTION * An error occurred again and an ERP has been detected which is already * used to handle this error (e.g. retries). * All prior ERP's are asumed to be successful and therefore removed * from queue. * If retry counter of matching erp is already 0, it is checked if further * action is needed (besides retry) or if the ERP has failed. * * PARAMETER * erp_head first ERP in ERP-chain * erp ERP that handles the actual error. * (matching erp) * * RETURN VALUES * erp modified/additional ERP */ static struct dasd_ccw_req * dasd_3990_erp_handle_match_erp(struct dasd_ccw_req *erp_head, struct dasd_ccw_req *erp) { struct dasd_device *device = erp_head->startdev; struct dasd_ccw_req *erp_done = erp_head; /* finished req */ struct dasd_ccw_req *erp_free = NULL; /* req to be freed */ /* loop over successful ERPs and remove them from chanq */ while (erp_done != erp) { if (erp_done == NULL) /* end of chain reached */ panic(PRINTK_HEADER "Programming error in ERP! The " "original request was lost\n"); /* remove the request from the device queue */ list_del(&erp_done->blocklist); erp_free = erp_done; erp_done = erp_done->refers; /* free the finished erp request */ dasd_free_erp_request(erp_free, erp_free->memdev); } /* end while */ if (erp->retries > 0) { char *sense = dasd_get_sense(&erp->refers->irb); /* check for special retries */ if (sense && erp->function == dasd_3990_erp_action_4) { erp = dasd_3990_erp_action_4(erp, sense); } else if (sense && erp->function == dasd_3990_erp_action_1B_32) { erp = dasd_3990_update_1B(erp, sense); } else if (sense && erp->function == dasd_3990_erp_int_req) { erp = dasd_3990_erp_int_req(erp); } else { /* simple retry */ DBF_DEV_EVENT(DBF_DEBUG, device, "%i retries left for erp %p", erp->retries, erp); /* handle the request again... */ erp->status = DASD_CQR_FILLED; } } else { /* no retry left - check for further necessary action */ /* if no further actions, handle rest as permanent error */ erp = dasd_3990_erp_further_erp(erp); } return erp; } /* end dasd_3990_erp_handle_match_erp */ /* * DASD_3990_ERP_ACTION * * DESCRIPTION * control routine for 3990 erp actions. * Has to be called with the queue lock (namely the s390_irq_lock) acquired. * * PARAMETER * cqr failed cqr (either original cqr or already an erp) * * RETURN VALUES * erp erp-pointer to the head of the ERP action chain. * This means: * - either a ptr to an additional ERP cqr or * - the original given cqr (which's status might * be modified) */ struct dasd_ccw_req * dasd_3990_erp_action(struct dasd_ccw_req * cqr) { struct dasd_ccw_req *erp = NULL; struct dasd_device *device = cqr->startdev; struct dasd_ccw_req *temp_erp = NULL; if (device->features & DASD_FEATURE_ERPLOG) { /* print current erp_chain */ dev_err(&device->cdev->dev, "ERP chain at BEGINNING of ERP-ACTION\n"); for (temp_erp = cqr; temp_erp != NULL; temp_erp = temp_erp->refers) { dev_err(&device->cdev->dev, "ERP %p (%02x) refers to %p\n", temp_erp, temp_erp->status, temp_erp->refers); } } /* double-check if current erp/cqr was successful */ if ((scsw_cstat(&cqr->irb.scsw) == 0x00) && (scsw_dstat(&cqr->irb.scsw) == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { DBF_DEV_EVENT(DBF_DEBUG, device, "ERP called for successful request %p" " - NO ERP necessary", cqr); cqr->status = DASD_CQR_DONE; return cqr; } /* check if error happened before */ erp = dasd_3990_erp_in_erp(cqr); if (erp == NULL) { /* no matching erp found - set up erp */ erp = dasd_3990_erp_additional_erp(cqr); if (IS_ERR(erp)) return erp; } else { /* matching erp found - set all leading erp's to DONE */ erp = dasd_3990_erp_handle_match_erp(cqr, erp); } /* * For path verification work we need to stick with the path that was * originally chosen so that the per path configuration data is * assigned correctly. */ if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) { erp->lpm = cqr->lpm; } if (device->features & DASD_FEATURE_ERPLOG) { /* print current erp_chain */ dev_err(&device->cdev->dev, "ERP chain at END of ERP-ACTION\n"); for (temp_erp = erp; temp_erp != NULL; temp_erp = temp_erp->refers) { dev_err(&device->cdev->dev, "ERP %p (%02x) refers to %p\n", temp_erp, temp_erp->status, temp_erp->refers); } } /* enqueue ERP request if it's a new one */ if (list_empty(&erp->blocklist)) { cqr->status = DASD_CQR_IN_ERP; /* add erp request before the cqr */ list_add_tail(&erp->blocklist, &cqr->blocklist); } return erp; } /* end dasd_3990_erp_action */
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