/* * tape device discipline for 3590 tapes. * * Copyright IBM Corp. 2001, 2009 * Author(s): Stefan Bader * Michael Holzheu * Martin Schwidefsky */ #define KMSG_COMPONENT "tape_3590" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include #include #include #include #include #define TAPE_DBF_AREA tape_3590_dbf #define BUFSIZE 512 /* size of buffers for dynamic generated messages */ #include "tape.h" #include "tape_std.h" #include "tape_3590.h" static struct workqueue_struct *tape_3590_wq; /* * Pointer to debug area. */ debug_info_t *TAPE_DBF_AREA = NULL; EXPORT_SYMBOL(TAPE_DBF_AREA); /******************************************************************* * Error Recovery functions: * - Read Opposite: implemented * - Read Device (buffered) log: BRA * - Read Library log: BRA * - Swap Devices: BRA * - Long Busy: implemented * - Special Intercept: BRA * - Read Alternate: implemented *******************************************************************/ static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { [0x00] = "", [0x10] = "Lost Sense", [0x11] = "Assigned Elsewhere", [0x12] = "Allegiance Reset", [0x13] = "Shared Access Violation", [0x20] = "Command Reject", [0x21] = "Configuration Error", [0x22] = "Protection Exception", [0x23] = "Write Protect", [0x24] = "Write Length", [0x25] = "Read-Only Format", [0x31] = "Beginning of Partition", [0x33] = "End of Partition", [0x34] = "End of Data", [0x35] = "Block not found", [0x40] = "Device Intervention", [0x41] = "Loader Intervention", [0x42] = "Library Intervention", [0x50] = "Write Error", [0x51] = "Erase Error", [0x52] = "Formatting Error", [0x53] = "Read Error", [0x54] = "Unsupported Format", [0x55] = "No Formatting", [0x56] = "Positioning lost", [0x57] = "Read Length", [0x60] = "Unsupported Medium", [0x61] = "Medium Length Error", [0x62] = "Medium removed", [0x64] = "Load Check", [0x65] = "Unload Check", [0x70] = "Equipment Check", [0x71] = "Bus out Check", [0x72] = "Protocol Error", [0x73] = "Interface Error", [0x74] = "Overrun", [0x75] = "Halt Signal", [0x90] = "Device fenced", [0x91] = "Device Path fenced", [0xa0] = "Volume misplaced", [0xa1] = "Volume inaccessible", [0xa2] = "Volume in input", [0xa3] = "Volume ejected", [0xa4] = "All categories reserved", [0xa5] = "Duplicate Volume", [0xa6] = "Library Manager Offline", [0xa7] = "Library Output Station full", [0xa8] = "Vision System non-operational", [0xa9] = "Library Manager Equipment Check", [0xaa] = "Library Equipment Check", [0xab] = "All Library Cells full", [0xac] = "No Cleaner Volumes in Library", [0xad] = "I/O Station door open", [0xae] = "Subsystem environmental alert", }; static int crypt_supported(struct tape_device *device) { return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); } static int crypt_enabled(struct tape_device *device) { return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); } static void ext_to_int_kekl(struct tape390_kekl *in, struct tape3592_kekl *out) { int i; memset(out, 0, sizeof(*out)); if (in->type == TAPE390_KEKL_TYPE_HASH) out->flags |= 0x40; if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) out->flags |= 0x80; strncpy(out->label, in->label, 64); for (i = strlen(in->label); i < sizeof(out->label); i++) out->label[i] = ' '; ASCEBC(out->label, sizeof(out->label)); } static void int_to_ext_kekl(struct tape3592_kekl *in, struct tape390_kekl *out) { memset(out, 0, sizeof(*out)); if(in->flags & 0x40) out->type = TAPE390_KEKL_TYPE_HASH; else out->type = TAPE390_KEKL_TYPE_LABEL; if(in->flags & 0x80) out->type_on_tape = TAPE390_KEKL_TYPE_HASH; else out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; memcpy(out->label, in->label, sizeof(in->label)); EBCASC(out->label, sizeof(in->label)); strim(out->label); } static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, struct tape390_kekl_pair *out) { if (in->count == 0) { out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; } else if (in->count == 1) { int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; } else if (in->count == 2) { int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); } else { printk("Invalid KEKL number: %d\n", in->count); BUG(); } } static int check_ext_kekl(struct tape390_kekl *kekl) { if (kekl->type == TAPE390_KEKL_TYPE_NONE) goto invalid; if (kekl->type > TAPE390_KEKL_TYPE_HASH) goto invalid; if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) goto invalid; if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) goto invalid; if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) goto invalid; return 0; invalid: return -EINVAL; } static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) { if (check_ext_kekl(&kekls->kekl[0])) goto invalid; if (check_ext_kekl(&kekls->kekl[1])) goto invalid; return 0; invalid: return -EINVAL; } /* * Query KEKLs */ static int tape_3592_kekl_query(struct tape_device *device, struct tape390_kekl_pair *ext_kekls) { struct tape_request *request; struct tape3592_kekl_query_order *order; struct tape3592_kekl_query_data *int_kekls; int rc; DBF_EVENT(6, "tape3592_kekl_query\n"); int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); if (!int_kekls) return -ENOMEM; request = tape_alloc_request(2, sizeof(*order)); if (IS_ERR(request)) { rc = PTR_ERR(request); goto fail_malloc; } order = request->cpdata; memset(order,0,sizeof(*order)); order->code = 0xe2; order->max_count = 2; request->op = TO_KEKL_QUERY; tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), int_kekls); rc = tape_do_io(device, request); if (rc) goto fail_request; int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); rc = 0; fail_request: tape_free_request(request); fail_malloc: kfree(int_kekls); return rc; } /* * IOCTL: Query KEKLs */ static int tape_3592_ioctl_kekl_query(struct tape_device *device, unsigned long arg) { int rc; struct tape390_kekl_pair *ext_kekls; DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); if (!crypt_supported(device)) return -ENOSYS; if (!crypt_enabled(device)) return -EUNATCH; ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); if (!ext_kekls) return -ENOMEM; rc = tape_3592_kekl_query(device, ext_kekls); if (rc != 0) goto fail; if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { rc = -EFAULT; goto fail; } rc = 0; fail: kfree(ext_kekls); return rc; } static int tape_3590_mttell(struct tape_device *device, int mt_count); /* * Set KEKLs */ static int tape_3592_kekl_set(struct tape_device *device, struct tape390_kekl_pair *ext_kekls) { struct tape_request *request; struct tape3592_kekl_set_order *order; DBF_EVENT(6, "tape3592_kekl_set\n"); if (check_ext_kekl_pair(ext_kekls)) { DBF_EVENT(6, "invalid kekls\n"); return -EINVAL; } if (tape_3590_mttell(device, 0) != 0) return -EBADSLT; request = tape_alloc_request(1, sizeof(*order)); if (IS_ERR(request)) return PTR_ERR(request); order = request->cpdata; memset(order, 0, sizeof(*order)); order->code = 0xe3; order->kekls.count = 2; ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); request->op = TO_KEKL_SET; tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); return tape_do_io_free(device, request); } /* * IOCTL: Set KEKLs */ static int tape_3592_ioctl_kekl_set(struct tape_device *device, unsigned long arg) { int rc; struct tape390_kekl_pair *ext_kekls; DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); if (!crypt_supported(device)) return -ENOSYS; if (!crypt_enabled(device)) return -EUNATCH; ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls)); if (IS_ERR(ext_kekls)) return PTR_ERR(ext_kekls); rc = tape_3592_kekl_set(device, ext_kekls); kfree(ext_kekls); return rc; } /* * Enable encryption */ static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device) { struct tape_request *request; char *data; DBF_EVENT(6, "tape_3592_enable_crypt\n"); if (!crypt_supported(device)) return ERR_PTR(-ENOSYS); request = tape_alloc_request(2, 72); if (IS_ERR(request)) return request; data = request->cpdata; memset(data,0,72); data[0] = 0x05; data[36 + 0] = 0x03; data[36 + 1] = 0x03; data[36 + 4] = 0x40; data[36 + 6] = 0x01; data[36 + 14] = 0x2f; data[36 + 18] = 0xc3; data[36 + 35] = 0x72; request->op = TO_CRYPT_ON; tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); return request; } static int tape_3592_enable_crypt(struct tape_device *device) { struct tape_request *request; request = __tape_3592_enable_crypt(device); if (IS_ERR(request)) return PTR_ERR(request); return tape_do_io_free(device, request); } static void tape_3592_enable_crypt_async(struct tape_device *device) { struct tape_request *request; request = __tape_3592_enable_crypt(device); if (!IS_ERR(request)) tape_do_io_async_free(device, request); } /* * Disable encryption */ static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device) { struct tape_request *request; char *data; DBF_EVENT(6, "tape_3592_disable_crypt\n"); if (!crypt_supported(device)) return ERR_PTR(-ENOSYS); request = tape_alloc_request(2, 72); if (IS_ERR(request)) return request; data = request->cpdata; memset(data,0,72); data[0] = 0x05; data[36 + 0] = 0x03; data[36 + 1] = 0x03; data[36 + 35] = 0x32; request->op = TO_CRYPT_OFF; tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); return request; } static int tape_3592_disable_crypt(struct tape_device *device) { struct tape_request *request; request = __tape_3592_disable_crypt(device); if (IS_ERR(request)) return PTR_ERR(request); return tape_do_io_free(device, request); } static void tape_3592_disable_crypt_async(struct tape_device *device) { struct tape_request *request; request = __tape_3592_disable_crypt(device); if (!IS_ERR(request)) tape_do_io_async_free(device, request); } /* * IOCTL: Set encryption status */ static int tape_3592_ioctl_crypt_set(struct tape_device *device, unsigned long arg) { struct tape390_crypt_info info; DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); if (!crypt_supported(device)) return -ENOSYS; if (copy_from_user(&info, (char __user *)arg, sizeof(info))) return -EFAULT; if (info.status & ~TAPE390_CRYPT_ON_MASK) return -EINVAL; if (info.status & TAPE390_CRYPT_ON_MASK) return tape_3592_enable_crypt(device); else return tape_3592_disable_crypt(device); } static int tape_3590_sense_medium(struct tape_device *device); /* * IOCTL: Query enryption status */ static int tape_3592_ioctl_crypt_query(struct tape_device *device, unsigned long arg) { DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); if (!crypt_supported(device)) return -ENOSYS; tape_3590_sense_medium(device); if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), sizeof(TAPE_3590_CRYPT_INFO(device)))) return -EFAULT; else return 0; } /* * 3590 IOCTL Overload */ static int tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) { switch (cmd) { case TAPE390_DISPLAY: { struct display_struct disp; if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) return -EFAULT; return tape_std_display(device, &disp); } case TAPE390_KEKL_SET: return tape_3592_ioctl_kekl_set(device, arg); case TAPE390_KEKL_QUERY: return tape_3592_ioctl_kekl_query(device, arg); case TAPE390_CRYPT_SET: return tape_3592_ioctl_crypt_set(device, arg); case TAPE390_CRYPT_QUERY: return tape_3592_ioctl_crypt_query(device, arg); default: return -EINVAL; /* no additional ioctls */ } } /* * SENSE Medium: Get Sense data about medium state */ static int tape_3590_sense_medium(struct tape_device *device) { struct tape_request *request; request = tape_alloc_request(1, 128); if (IS_ERR(request)) return PTR_ERR(request); request->op = TO_MSEN; tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); return tape_do_io_free(device, request); } static void tape_3590_sense_medium_async(struct tape_device *device) { struct tape_request *request; request = tape_alloc_request(1, 128); if (IS_ERR(request)) return; request->op = TO_MSEN; tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); tape_do_io_async_free(device, request); } /* * MTTELL: Tell block. Return the number of block relative to current file. */ static int tape_3590_mttell(struct tape_device *device, int mt_count) { __u64 block_id; int rc; rc = tape_std_read_block_id(device, &block_id); if (rc) return rc; return block_id >> 32; } /* * MTSEEK: seek to the specified block. */ static int tape_3590_mtseek(struct tape_device *device, int count) { struct tape_request *request; DBF_EVENT(6, "xsee id: %x\n", count); request = tape_alloc_request(3, 4); if (IS_ERR(request)) return PTR_ERR(request); request->op = TO_LBL; tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); *(__u32 *) request->cpdata = count; tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); return tape_do_io_free(device, request); } /* * Read Opposite Error Recovery Function: * Used, when Read Forward does not work */ static void tape_3590_read_opposite(struct tape_device *device, struct tape_request *request) { struct tape_3590_disc_data *data; /* * We have allocated 4 ccws in tape_std_read, so we can now * transform the request to a read backward, followed by a * forward space block. */ request->op = TO_RBA; tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); data = device->discdata; tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, device->char_data.idal_buf); tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); DBF_EVENT(6, "xrop ccwg\n"); } /* * Read Attention Msg * This should be done after an interrupt with attention bit (0x80) * in device state. * * After a "read attention message" request there are two possible * results: * * 1. A unit check is presented, when attention sense is present (e.g. when * a medium has been unloaded). The attention sense comes then * together with the unit check. The recovery action is either "retry" * (in case there is an attention message pending) or "permanent error". * * 2. The attention msg is written to the "read subsystem data" buffer. * In this case we probably should print it to the console. */ static void tape_3590_read_attmsg_async(struct tape_device *device) { struct tape_request *request; char *buf; request = tape_alloc_request(3, 4096); if (IS_ERR(request)) return; request->op = TO_READ_ATTMSG; buf = request->cpdata; buf[0] = PREP_RD_SS_DATA; buf[6] = RD_ATTMSG; /* read att msg */ tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); tape_do_io_async_free(device, request); } /* * These functions are used to schedule follow-up actions from within an * interrupt context (like unsolicited interrupts). * Note: the work handler is called by the system work queue. The tape * commands started by the handler need to be asynchrounous, otherwise * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq). */ struct work_handler_data { struct tape_device *device; enum tape_op op; struct work_struct work; }; static void tape_3590_work_handler(struct work_struct *work) { struct work_handler_data *p = container_of(work, struct work_handler_data, work); switch (p->op) { case TO_MSEN: tape_3590_sense_medium_async(p->device); break; case TO_READ_ATTMSG: tape_3590_read_attmsg_async(p->device); break; case TO_CRYPT_ON: tape_3592_enable_crypt_async(p->device); break; case TO_CRYPT_OFF: tape_3592_disable_crypt_async(p->device); break; default: DBF_EVENT(3, "T3590: work handler undefined for " "operation 0x%02x\n", p->op); } tape_put_device(p->device); kfree(p); } static int tape_3590_schedule_work(struct tape_device *device, enum tape_op op) { struct work_handler_data *p; if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) return -ENOMEM; INIT_WORK(&p->work, tape_3590_work_handler); p->device = tape_get_device(device); p->op = op; queue_work(tape_3590_wq, &p->work); return 0; } static void tape_3590_med_state_set(struct tape_device *device, struct tape_3590_med_sense *sense) { struct tape390_crypt_info *c_info; c_info = &TAPE_3590_CRYPT_INFO(device); DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); switch (sense->macst) { case 0x04: case 0x05: case 0x06: tape_med_state_set(device, MS_UNLOADED); TAPE_3590_CRYPT_INFO(device).medium_status = 0; return; case 0x08: case 0x09: tape_med_state_set(device, MS_LOADED); break; default: tape_med_state_set(device, MS_UNKNOWN); return; } c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; if (sense->flags & MSENSE_CRYPT_MASK) { DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; } else { DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; } } /* * The done handler is called at device/channel end and wakes up the sleeping * process */ static int tape_3590_done(struct tape_device *device, struct tape_request *request) { DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); switch (request->op) { case TO_BSB: case TO_BSF: case TO_DSE: case TO_FSB: case TO_FSF: case TO_LBL: case TO_RFO: case TO_RBA: case TO_REW: case TO_WRI: case TO_WTM: case TO_BLOCK: case TO_LOAD: tape_med_state_set(device, MS_LOADED); break; case TO_RUN: tape_med_state_set(device, MS_UNLOADED); tape_3590_schedule_work(device, TO_CRYPT_OFF); break; case TO_MSEN: tape_3590_med_state_set(device, request->cpdata); break; case TO_CRYPT_ON: TAPE_3590_CRYPT_INFO(device).status |= TAPE390_CRYPT_ON_MASK; *(device->modeset_byte) |= 0x03; break; case TO_CRYPT_OFF: TAPE_3590_CRYPT_INFO(device).status &= ~TAPE390_CRYPT_ON_MASK; *(device->modeset_byte) &= ~0x03; break; case TO_RBI: /* RBI seems to succeed even without medium loaded. */ case TO_NOP: /* Same to NOP. */ case TO_READ_CONFIG: case TO_READ_ATTMSG: case TO_DIS: case TO_ASSIGN: case TO_UNASSIGN: case TO_SIZE: case TO_KEKL_SET: case TO_KEKL_QUERY: case TO_RDC: break; } return TAPE_IO_SUCCESS; } /* * This function is called, when error recovery was successful */ static inline int tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) { DBF_EVENT(3, "Error Recovery successful for %s\n", tape_op_verbose[request->op]); return tape_3590_done(device, request); } /* * This function is called, when error recovery was not successful */ static inline int tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, struct irb *irb, int rc) { DBF_EVENT(3, "Error Recovery failed for %s\n", tape_op_verbose[request->op]); tape_dump_sense_dbf(device, request, irb); return rc; } /* * Error Recovery do retry */ static inline int tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, struct irb *irb) { DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); tape_dump_sense_dbf(device, request, irb); return TAPE_IO_RETRY; } /* * Handle unsolicited interrupts */ static int tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) { if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) /* Probably result of halt ssch */ return TAPE_IO_PENDING; else if (irb->scsw.cmd.dstat == 0x85) /* Device Ready */ DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { tape_3590_schedule_work(device, TO_READ_ATTMSG); } else { DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); tape_dump_sense_dbf(device, NULL, irb); } /* check medium state */ tape_3590_schedule_work(device, TO_MSEN); return TAPE_IO_SUCCESS; } /* * Basic Recovery routine */ static int tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, struct irb *irb, int rc) { struct tape_3590_sense *sense; sense = (struct tape_3590_sense *) irb->ecw; switch (sense->bra) { case SENSE_BRA_PER: return tape_3590_erp_failed(device, request, irb, rc); case SENSE_BRA_CONT: return tape_3590_erp_succeded(device, request); case SENSE_BRA_RE: return tape_3590_erp_retry(device, request, irb); case SENSE_BRA_DRE: return tape_3590_erp_failed(device, request, irb, rc); default: BUG(); return TAPE_IO_STOP; } } /* * RDL: Read Device (buffered) log */ static int tape_3590_erp_read_buf_log(struct tape_device *device, struct tape_request *request, struct irb *irb) { /* * We just do the basic error recovery at the moment (retry). * Perhaps in the future, we read the log and dump it somewhere... */ return tape_3590_erp_basic(device, request, irb, -EIO); } /* * SWAP: Swap Devices */ static int tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, struct irb *irb) { /* * This error recovery should swap the tapes * if the original has a problem. The operation * should proceed with the new tape... this * should probably be done in user space! */ dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " "different tape unit\n"); return tape_3590_erp_basic(device, request, irb, -EIO); } /* * LBY: Long Busy */ static int tape_3590_erp_long_busy(struct tape_device *device, struct tape_request *request, struct irb *irb) { DBF_EVENT(6, "Device is busy\n"); return TAPE_IO_LONG_BUSY; } /* * SPI: Special Intercept */ static int tape_3590_erp_special_interrupt(struct tape_device *device, struct tape_request *request, struct irb *irb) { return tape_3590_erp_basic(device, request, irb, -EIO); } /* * RDA: Read Alternate */ static int tape_3590_erp_read_alternate(struct tape_device *device, struct tape_request *request, struct irb *irb) { struct tape_3590_disc_data *data; /* * The issued Read Backward or Read Previous command is not * supported by the device * The recovery action should be to issue another command: * Read Revious: if Read Backward is not supported * Read Backward: if Read Previous is not supported */ data = device->discdata; if (data->read_back_op == READ_PREVIOUS) { DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", device->cdev_id); data->read_back_op = READ_BACKWARD; } else { DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", device->cdev_id); data->read_back_op = READ_PREVIOUS; } tape_3590_read_opposite(device, request); return tape_3590_erp_retry(device, request, irb); } /* * Error Recovery read opposite */ static int tape_3590_erp_read_opposite(struct tape_device *device, struct tape_request *request, struct irb *irb) { switch (request->op) { case TO_RFO: /* * We did read forward, but the data could not be read. * We will read backward and then skip forward again. */ tape_3590_read_opposite(device, request); return tape_3590_erp_retry(device, request, irb); case TO_RBA: /* We tried to read forward and backward, but hat no success */ return tape_3590_erp_failed(device, request, irb, -EIO); break; default: return tape_3590_erp_failed(device, request, irb, -EIO); } } /* * Print an MIM (Media Information Message) (message code f0) */ static void tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) { struct tape_3590_sense *sense; char *exception, *service; exception = kmalloc(BUFSIZE, GFP_ATOMIC); service = kmalloc(BUFSIZE, GFP_ATOMIC); if (!exception || !service) goto out_nomem; sense = (struct tape_3590_sense *) irb->ecw; /* Exception Message */ switch (sense->fmt.f70.emc) { case 0x02: snprintf(exception, BUFSIZE, "Data degraded"); break; case 0x03: snprintf(exception, BUFSIZE, "Data degraded in partion %i", sense->fmt.f70.mp); break; case 0x04: snprintf(exception, BUFSIZE, "Medium degraded"); break; case 0x05: snprintf(exception, BUFSIZE, "Medium degraded in partition %i", sense->fmt.f70.mp); break; case 0x06: snprintf(exception, BUFSIZE, "Block 0 Error"); break; case 0x07: snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", sense->fmt.f70.md); break; default: snprintf(exception, BUFSIZE, "0x%02x", sense->fmt.f70.emc); break; } /* Service Message */ switch (sense->fmt.f70.smc) { case 0x02: snprintf(service, BUFSIZE, "Reference Media maintenance " "procedure %i", sense->fmt.f70.md); break; default: snprintf(service, BUFSIZE, "0x%02x", sense->fmt.f70.smc); break; } dev_warn (&device->cdev->dev, "Tape media information: exception %s, " "service %s\n", exception, service); out_nomem: kfree(exception); kfree(service); } /* * Print an I/O Subsystem Service Information Message (message code f1) */ static void tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) { struct tape_3590_sense *sense; char *exception, *service; exception = kmalloc(BUFSIZE, GFP_ATOMIC); service = kmalloc(BUFSIZE, GFP_ATOMIC); if (!exception || !service) goto out_nomem; sense = (struct tape_3590_sense *) irb->ecw; /* Exception Message */ switch (sense->fmt.f71.emc) { case 0x01: snprintf(exception, BUFSIZE, "Effect of failure is unknown"); break; case 0x02: snprintf(exception, BUFSIZE, "CU Exception - no performance " "impact"); break; case 0x03: snprintf(exception, BUFSIZE, "CU Exception on channel " "interface 0x%02x", sense->fmt.f71.md[0]); break; case 0x04: snprintf(exception, BUFSIZE, "CU Exception on device path " "0x%02x", sense->fmt.f71.md[0]); break; case 0x05: snprintf(exception, BUFSIZE, "CU Exception on library path " "0x%02x", sense->fmt.f71.md[0]); break; case 0x06: snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", sense->fmt.f71.md[0]); break; case 0x07: snprintf(exception, BUFSIZE, "CU Exception on partition " "0x%02x", sense->fmt.f71.md[0]); break; default: snprintf(exception, BUFSIZE, "0x%02x", sense->fmt.f71.emc); } /* Service Message */ switch (sense->fmt.f71.smc) { case 0x01: snprintf(service, BUFSIZE, "Repair impact is unknown"); break; case 0x02: snprintf(service, BUFSIZE, "Repair will not impact cu " "performance"); break; case 0x03: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable node " "0x%x on CU", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable " "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x04: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable " "channel path 0x%x on CU", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable channel" " paths (0x%x-0x%x) on CU", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x05: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable device" " path 0x%x on CU", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable device" " paths (0x%x-0x%x) on CU", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x06: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable " "library path 0x%x on CU", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable " "library paths (0x%x-0x%x) on CU", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x07: snprintf(service, BUFSIZE, "Repair will disable access to CU"); break; default: snprintf(service, BUFSIZE, "0x%02x", sense->fmt.f71.smc); } dev_warn (&device->cdev->dev, "I/O subsystem information: exception" " %s, service %s\n", exception, service); out_nomem: kfree(exception); kfree(service); } /* * Print an Device Subsystem Service Information Message (message code f2) */ static void tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) { struct tape_3590_sense *sense; char *exception, *service; exception = kmalloc(BUFSIZE, GFP_ATOMIC); service = kmalloc(BUFSIZE, GFP_ATOMIC); if (!exception || !service) goto out_nomem; sense = (struct tape_3590_sense *) irb->ecw; /* Exception Message */ switch (sense->fmt.f71.emc) { case 0x01: snprintf(exception, BUFSIZE, "Effect of failure is unknown"); break; case 0x02: snprintf(exception, BUFSIZE, "DV Exception - no performance" " impact"); break; case 0x03: snprintf(exception, BUFSIZE, "DV Exception on channel " "interface 0x%02x", sense->fmt.f71.md[0]); break; case 0x04: snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", sense->fmt.f71.md[0]); break; case 0x05: snprintf(exception, BUFSIZE, "DV Exception on message display" " 0x%02x", sense->fmt.f71.md[0]); break; case 0x06: snprintf(exception, BUFSIZE, "DV Exception in tape path"); break; case 0x07: snprintf(exception, BUFSIZE, "DV Exception in drive"); break; default: snprintf(exception, BUFSIZE, "0x%02x", sense->fmt.f71.emc); } /* Service Message */ switch (sense->fmt.f71.smc) { case 0x01: snprintf(service, BUFSIZE, "Repair impact is unknown"); break; case 0x02: snprintf(service, BUFSIZE, "Repair will not impact device " "performance"); break; case 0x03: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable " "channel path 0x%x on DV", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable " "channel path (0x%x-0x%x) on DV", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x04: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable " "interface 0x%x on DV", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable " "interfaces (0x%x-0x%x) on DV", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x05: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable loader" " 0x%x on DV", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable loader" " (0x%x-0x%x) on DV", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x07: snprintf(service, BUFSIZE, "Repair will disable access to DV"); break; case 0x08: if (sense->fmt.f71.mdf == 0) snprintf(service, BUFSIZE, "Repair will disable " "message display 0x%x on DV", sense->fmt.f71.md[1]); else snprintf(service, BUFSIZE, "Repair will disable " "message displays (0x%x-0x%x) on DV", sense->fmt.f71.md[1], sense->fmt.f71.md[2]); break; case 0x09: snprintf(service, BUFSIZE, "Clean DV"); break; default: snprintf(service, BUFSIZE, "0x%02x", sense->fmt.f71.smc); } dev_warn (&device->cdev->dev, "Device subsystem information: exception" " %s, service %s\n", exception, service); out_nomem: kfree(exception); kfree(service); } /* * Print standard ERA Message */ static void tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) { struct tape_3590_sense *sense; sense = (struct tape_3590_sense *) irb->ecw; if (sense->mc == 0) return; if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { if (tape_3590_msg[sense->mc] != NULL) dev_warn (&device->cdev->dev, "The tape unit has " "issued sense message %s\n", tape_3590_msg[sense->mc]); else dev_warn (&device->cdev->dev, "The tape unit has " "issued an unknown sense message code 0x%x\n", sense->mc); return; } if (sense->mc == 0xf0) { /* Standard Media Information Message */ dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, sense->fmt.f70.emc, sense->fmt.f70.smc, sense->fmt.f70.refcode, sense->fmt.f70.mid, sense->fmt.f70.fid); tape_3590_print_mim_msg_f0(device, irb); return; } if (sense->mc == 0xf1) { /* Standard I/O Subsystem Service Information Message */ dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", sense->fmt.f71.sev, device->cdev->id.dev_model, sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); tape_3590_print_io_sim_msg_f1(device, irb); return; } if (sense->mc == 0xf2) { /* Standard Device Service Information Message */ dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", sense->fmt.f71.sev, device->cdev->id.dev_model, sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, sense->fmt.f71.refcode3); tape_3590_print_dev_sim_msg_f2(device, irb); return; } if (sense->mc == 0xf3) { /* Standard Library Service Information Message */ return; } dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " "sense message code %x\n", sense->mc); } static int tape_3590_crypt_error(struct tape_device *device, struct tape_request *request, struct irb *irb) { u8 cu_rc; u16 ekm_rc2; char *sense; sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; cu_rc = sense[0]; ekm_rc2 = *((u16*) &sense[10]); if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) /* key not defined on EKM */ return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); if ((cu_rc == 1) || (cu_rc == 2)) /* No connection to EKM */ return tape_3590_erp_basic(device, request, irb, -ENOTCONN); dev_err (&device->cdev->dev, "The tape unit failed to obtain the " "encryption key from EKM\n"); return tape_3590_erp_basic(device, request, irb, -ENOKEY); } /* * 3590 error Recovery routine: * If possible, it tries to recover from the error. If this is not possible, * inform the user about the problem. */ static int tape_3590_unit_check(struct tape_device *device, struct tape_request *request, struct irb *irb) { struct tape_3590_sense *sense; sense = (struct tape_3590_sense *) irb->ecw; DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); /* * First check all RC-QRCs where we want to do something special * - "break": basic error recovery is done * - "goto out:": just print error message if available */ switch (sense->rc_rqc) { case 0x1110: tape_3590_print_era_msg(device, irb); return tape_3590_erp_read_buf_log(device, request, irb); case 0x2011: tape_3590_print_era_msg(device, irb); return tape_3590_erp_read_alternate(device, request, irb); case 0x2230: case 0x2231: tape_3590_print_era_msg(device, irb); return tape_3590_erp_special_interrupt(device, request, irb); case 0x2240: return tape_3590_crypt_error(device, request, irb); case 0x3010: DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", device->cdev_id); return tape_3590_erp_basic(device, request, irb, -ENOSPC); case 0x3012: DBF_EVENT(2, "(%08x): Forward at End of Partition\n", device->cdev_id); return tape_3590_erp_basic(device, request, irb, -ENOSPC); case 0x3020: DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); return tape_3590_erp_basic(device, request, irb, -ENOSPC); case 0x3122: DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", device->cdev_id); return tape_3590_erp_basic(device, request, irb, -EIO); case 0x3123: DBF_EVENT(2, "(%08x): Rewind Unload complete\n", device->cdev_id); tape_med_state_set(device, MS_UNLOADED); tape_3590_schedule_work(device, TO_CRYPT_OFF); return tape_3590_erp_basic(device, request, irb, 0); case 0x4010: /* * print additional msg since default msg * "device intervention" is not very meaningfull */ tape_med_state_set(device, MS_UNLOADED); tape_3590_schedule_work(device, TO_CRYPT_OFF); return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); case 0x4012: /* Device Long Busy */ /* XXX: Also use long busy handling here? */ DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); tape_3590_print_era_msg(device, irb); return tape_3590_erp_basic(device, request, irb, -EBUSY); case 0x4014: DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); return tape_3590_erp_long_busy(device, request, irb); case 0x5010: if (sense->rac == 0xd0) { /* Swap */ tape_3590_print_era_msg(device, irb); return tape_3590_erp_swap(device, request, irb); } if (sense->rac == 0x26) { /* Read Opposite */ tape_3590_print_era_msg(device, irb); return tape_3590_erp_read_opposite(device, request, irb); } return tape_3590_erp_basic(device, request, irb, -EIO); case 0x5020: case 0x5021: case 0x5022: case 0x5040: case 0x5041: case 0x5042: tape_3590_print_era_msg(device, irb); return tape_3590_erp_swap(device, request, irb); case 0x5110: case 0x5111: return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); case 0x5120: case 0x1120: tape_med_state_set(device, MS_UNLOADED); tape_3590_schedule_work(device, TO_CRYPT_OFF); return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); case 0x6020: return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); case 0x8011: return tape_3590_erp_basic(device, request, irb, -EPERM); case 0x8013: dev_warn (&device->cdev->dev, "A different host has privileged" " access to the tape unit\n"); return tape_3590_erp_basic(device, request, irb, -EPERM); default: return tape_3590_erp_basic(device, request, irb, -EIO); } } /* * 3590 interrupt handler: */ static int tape_3590_irq(struct tape_device *device, struct tape_request *request, struct irb *irb) { if (request == NULL) return tape_3590_unsolicited_irq(device, irb); if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && (request->op == TO_WRI)) { /* Write at end of volume */ DBF_EVENT(2, "End of volume\n"); return tape_3590_erp_failed(device, request, irb, -ENOSPC); } if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) return tape_3590_unit_check(device, request, irb); if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { if (request->op == TO_FSB || request->op == TO_BSB) request->rescnt++; else DBF_EVENT(5, "Unit Exception!\n"); } return tape_3590_done(device, request); } if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { DBF_EVENT(2, "channel end\n"); return TAPE_IO_PENDING; } if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { DBF_EVENT(2, "Unit Attention when busy..\n"); return TAPE_IO_PENDING; } DBF_EVENT(6, "xunknownirq\n"); tape_dump_sense_dbf(device, request, irb); return TAPE_IO_STOP; } static int tape_3590_read_dev_chars(struct tape_device *device, struct tape_3590_rdc_data *rdc_data) { int rc; struct tape_request *request; request = tape_alloc_request(1, sizeof(*rdc_data)); if (IS_ERR(request)) return PTR_ERR(request); request->op = TO_RDC; tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), request->cpdata); rc = tape_do_io(device, request); if (rc == 0) memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); tape_free_request(request); return rc; } /* * Setup device function */ static int tape_3590_setup_device(struct tape_device *device) { int rc; struct tape_3590_disc_data *data; struct tape_3590_rdc_data *rdc_data; DBF_EVENT(6, "3590 device setup\n"); data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); if (data == NULL) return -ENOMEM; data->read_back_op = READ_PREVIOUS; device->discdata = data; rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); if (!rdc_data) { rc = -ENOMEM; goto fail_kmalloc; } rc = tape_3590_read_dev_chars(device, rdc_data); if (rc) { DBF_LH(3, "Read device characteristics failed!\n"); goto fail_rdc_data; } rc = tape_std_assign(device); if (rc) goto fail_rdc_data; if (rdc_data->data[31] == 0x13) { data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; tape_3592_disable_crypt(device); } else { DBF_EVENT(6, "Device has NO crypto support\n"); } /* Try to find out if medium is loaded */ rc = tape_3590_sense_medium(device); if (rc) { DBF_LH(3, "3590 medium sense returned %d\n", rc); goto fail_rdc_data; } return 0; fail_rdc_data: kfree(rdc_data); fail_kmalloc: kfree(data); return rc; } /* * Cleanup device function */ static void tape_3590_cleanup_device(struct tape_device *device) { flush_workqueue(tape_3590_wq); tape_std_unassign(device); kfree(device->discdata); device->discdata = NULL; } /* * List of 3590 magnetic tape commands. */ static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { [MTRESET] = tape_std_mtreset, [MTFSF] = tape_std_mtfsf, [MTBSF] = tape_std_mtbsf, [MTFSR] = tape_std_mtfsr, [MTBSR] = tape_std_mtbsr, [MTWEOF] = tape_std_mtweof, [MTREW] = tape_std_mtrew, [MTOFFL] = tape_std_mtoffl, [MTNOP] = tape_std_mtnop, [MTRETEN] = tape_std_mtreten, [MTBSFM] = tape_std_mtbsfm, [MTFSFM] = tape_std_mtfsfm, [MTEOM] = tape_std_mteom, [MTERASE] = tape_std_mterase, [MTRAS1] = NULL, [MTRAS2] = NULL, [MTRAS3] = NULL, [MTSETBLK] = tape_std_mtsetblk, [MTSETDENSITY] = NULL, [MTSEEK] = tape_3590_mtseek, [MTTELL] = tape_3590_mttell, [MTSETDRVBUFFER] = NULL, [MTFSS] = NULL, [MTBSS] = NULL, [MTWSM] = NULL, [MTLOCK] = NULL, [MTUNLOCK] = NULL, [MTLOAD] = tape_std_mtload, [MTUNLOAD] = tape_std_mtunload, [MTCOMPRESSION] = tape_std_mtcompression, [MTSETPART] = NULL, [MTMKPART] = NULL }; /* * Tape discipline structure for 3590. */ static struct tape_discipline tape_discipline_3590 = { .owner = THIS_MODULE, .setup_device = tape_3590_setup_device, .cleanup_device = tape_3590_cleanup_device, .process_eov = tape_std_process_eov, .irq = tape_3590_irq, .read_block = tape_std_read_block, .write_block = tape_std_write_block, .ioctl_fn = tape_3590_ioctl, .mtop_array = tape_3590_mtop }; static struct ccw_device_id tape_3590_ids[] = { {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, { /* end of list */ } }; static int tape_3590_online(struct ccw_device *cdev) { return tape_generic_online(dev_get_drvdata(&cdev->dev), &tape_discipline_3590); } static struct ccw_driver tape_3590_driver = { .driver = { .name = "tape_3590", .owner = THIS_MODULE, }, .ids = tape_3590_ids, .probe = tape_generic_probe, .remove = tape_generic_remove, .set_offline = tape_generic_offline, .set_online = tape_3590_online, .freeze = tape_generic_pm_suspend, .int_class = IRQIO_TAP, }; /* * Setup discipline structure. */ static int tape_3590_init(void) { int rc; TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); #ifdef DBF_LIKE_HELL debug_set_level(TAPE_DBF_AREA, 6); #endif DBF_EVENT(3, "3590 init\n"); tape_3590_wq = alloc_workqueue("tape_3590", 0, 0); if (!tape_3590_wq) return -ENOMEM; /* Register driver for 3590 tapes. */ rc = ccw_driver_register(&tape_3590_driver); if (rc) { destroy_workqueue(tape_3590_wq); DBF_EVENT(3, "3590 init failed\n"); } else DBF_EVENT(3, "3590 registered\n"); return rc; } static void tape_3590_exit(void) { ccw_driver_unregister(&tape_3590_driver); destroy_workqueue(tape_3590_wq); debug_unregister(TAPE_DBF_AREA); } MODULE_DEVICE_TABLE(ccw, tape_3590_ids); MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); MODULE_LICENSE("GPL"); module_init(tape_3590_init); module_exit(tape_3590_exit);