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1// SPDX-License-Identifier: GPL-2.02/*3 * tape device discipline for 3590 tapes.4 *5 * Copyright IBM Corp. 2001, 20096 * Author(s): Stefan Bader <shbader@de.ibm.com>7 * Michael Holzheu <holzheu@de.ibm.com>8 * Martin Schwidefsky <schwidefsky@de.ibm.com>9 */10 11#define KMSG_COMPONENT "tape_3590"12#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt13 14#include <linux/module.h>15#include <linux/slab.h>16#include <linux/init.h>17#include <linux/bio.h>18#include <asm/ebcdic.h>19 20#define TAPE_DBF_AREA tape_3590_dbf21#define BUFSIZE 512 /* size of buffers for dynamic generated messages */22 23#include "tape.h"24#include "tape_std.h"25#include "tape_3590.h"26 27static struct workqueue_struct *tape_3590_wq;28 29/*30 * Pointer to debug area.31 */32debug_info_t *TAPE_DBF_AREA = NULL;33EXPORT_SYMBOL(TAPE_DBF_AREA);34 35/*******************************************************************36 * Error Recovery functions:37 * - Read Opposite: implemented38 * - Read Device (buffered) log: BRA39 * - Read Library log: BRA40 * - Swap Devices: BRA41 * - Long Busy: implemented42 * - Special Intercept: BRA43 * - Read Alternate: implemented44 *******************************************************************/45 46static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = {47 [0x00] = "",48 [0x10] = "Lost Sense",49 [0x11] = "Assigned Elsewhere",50 [0x12] = "Allegiance Reset",51 [0x13] = "Shared Access Violation",52 [0x20] = "Command Reject",53 [0x21] = "Configuration Error",54 [0x22] = "Protection Exception",55 [0x23] = "Write Protect",56 [0x24] = "Write Length",57 [0x25] = "Read-Only Format",58 [0x31] = "Beginning of Partition",59 [0x33] = "End of Partition",60 [0x34] = "End of Data",61 [0x35] = "Block not found",62 [0x40] = "Device Intervention",63 [0x41] = "Loader Intervention",64 [0x42] = "Library Intervention",65 [0x50] = "Write Error",66 [0x51] = "Erase Error",67 [0x52] = "Formatting Error",68 [0x53] = "Read Error",69 [0x54] = "Unsupported Format",70 [0x55] = "No Formatting",71 [0x56] = "Positioning lost",72 [0x57] = "Read Length",73 [0x60] = "Unsupported Medium",74 [0x61] = "Medium Length Error",75 [0x62] = "Medium removed",76 [0x64] = "Load Check",77 [0x65] = "Unload Check",78 [0x70] = "Equipment Check",79 [0x71] = "Bus out Check",80 [0x72] = "Protocol Error",81 [0x73] = "Interface Error",82 [0x74] = "Overrun",83 [0x75] = "Halt Signal",84 [0x90] = "Device fenced",85 [0x91] = "Device Path fenced",86 [0xa0] = "Volume misplaced",87 [0xa1] = "Volume inaccessible",88 [0xa2] = "Volume in input",89 [0xa3] = "Volume ejected",90 [0xa4] = "All categories reserved",91 [0xa5] = "Duplicate Volume",92 [0xa6] = "Library Manager Offline",93 [0xa7] = "Library Output Station full",94 [0xa8] = "Vision System non-operational",95 [0xa9] = "Library Manager Equipment Check",96 [0xaa] = "Library Equipment Check",97 [0xab] = "All Library Cells full",98 [0xac] = "No Cleaner Volumes in Library",99 [0xad] = "I/O Station door open",100 [0xae] = "Subsystem environmental alert",101};102 103static int crypt_supported(struct tape_device *device)104{105 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device));106}107 108static int crypt_enabled(struct tape_device *device)109{110 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device));111}112 113static void ext_to_int_kekl(struct tape390_kekl *in,114 struct tape3592_kekl *out)115{116 int len;117 118 memset(out, 0, sizeof(*out));119 if (in->type == TAPE390_KEKL_TYPE_HASH)120 out->flags |= 0x40;121 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)122 out->flags |= 0x80;123 len = min(sizeof(out->label), strlen(in->label));124 memcpy(out->label, in->label, len);125 memset(out->label + len, ' ', sizeof(out->label) - len);126 ASCEBC(out->label, sizeof(out->label));127}128 129static void int_to_ext_kekl(struct tape3592_kekl *in,130 struct tape390_kekl *out)131{132 memset(out, 0, sizeof(*out));133 if(in->flags & 0x40)134 out->type = TAPE390_KEKL_TYPE_HASH;135 else136 out->type = TAPE390_KEKL_TYPE_LABEL;137 if(in->flags & 0x80)138 out->type_on_tape = TAPE390_KEKL_TYPE_HASH;139 else140 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL;141 memcpy(out->label, in->label, sizeof(in->label));142 EBCASC(out->label, sizeof(in->label));143 strim(out->label);144}145 146static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in,147 struct tape390_kekl_pair *out)148{149 if (in->count == 0) {150 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE;151 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE;152 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;153 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;154 } else if (in->count == 1) {155 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);156 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE;157 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE;158 } else if (in->count == 2) {159 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]);160 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]);161 } else {162 printk("Invalid KEKL number: %d\n", in->count);163 BUG();164 }165}166 167static int check_ext_kekl(struct tape390_kekl *kekl)168{169 if (kekl->type == TAPE390_KEKL_TYPE_NONE)170 goto invalid;171 if (kekl->type > TAPE390_KEKL_TYPE_HASH)172 goto invalid;173 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE)174 goto invalid;175 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH)176 goto invalid;177 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) &&178 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL))179 goto invalid;180 181 return 0;182invalid:183 return -EINVAL;184}185 186static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls)187{188 if (check_ext_kekl(&kekls->kekl[0]))189 goto invalid;190 if (check_ext_kekl(&kekls->kekl[1]))191 goto invalid;192 193 return 0;194invalid:195 return -EINVAL;196}197 198/*199 * Query KEKLs200 */201static int tape_3592_kekl_query(struct tape_device *device,202 struct tape390_kekl_pair *ext_kekls)203{204 struct tape_request *request;205 struct tape3592_kekl_query_order *order;206 struct tape3592_kekl_query_data *int_kekls;207 int rc;208 209 DBF_EVENT(6, "tape3592_kekl_query\n");210 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA);211 if (!int_kekls)212 return -ENOMEM;213 request = tape_alloc_request(2, sizeof(*order));214 if (IS_ERR(request)) {215 rc = PTR_ERR(request);216 goto fail_malloc;217 }218 order = request->cpdata;219 memset(order,0,sizeof(*order));220 order->code = 0xe2;221 order->max_count = 2;222 request->op = TO_KEKL_QUERY;223 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);224 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls),225 int_kekls);226 rc = tape_do_io(device, request);227 if (rc)228 goto fail_request;229 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls);230 231 rc = 0;232fail_request:233 tape_free_request(request);234fail_malloc:235 kfree(int_kekls);236 return rc;237}238 239/*240 * IOCTL: Query KEKLs241 */242static int tape_3592_ioctl_kekl_query(struct tape_device *device,243 unsigned long arg)244{245 int rc;246 struct tape390_kekl_pair *ext_kekls;247 248 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n");249 if (!crypt_supported(device))250 return -ENOSYS;251 if (!crypt_enabled(device))252 return -EUNATCH;253 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL);254 if (!ext_kekls)255 return -ENOMEM;256 rc = tape_3592_kekl_query(device, ext_kekls);257 if (rc != 0)258 goto fail;259 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) {260 rc = -EFAULT;261 goto fail;262 }263 rc = 0;264fail:265 kfree(ext_kekls);266 return rc;267}268 269static int tape_3590_mttell(struct tape_device *device, int mt_count);270 271/*272 * Set KEKLs273 */274static int tape_3592_kekl_set(struct tape_device *device,275 struct tape390_kekl_pair *ext_kekls)276{277 struct tape_request *request;278 struct tape3592_kekl_set_order *order;279 280 DBF_EVENT(6, "tape3592_kekl_set\n");281 if (check_ext_kekl_pair(ext_kekls)) {282 DBF_EVENT(6, "invalid kekls\n");283 return -EINVAL;284 }285 if (tape_3590_mttell(device, 0) != 0)286 return -EBADSLT;287 request = tape_alloc_request(1, sizeof(*order));288 if (IS_ERR(request))289 return PTR_ERR(request);290 order = request->cpdata;291 memset(order, 0, sizeof(*order));292 order->code = 0xe3;293 order->kekls.count = 2;294 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]);295 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]);296 request->op = TO_KEKL_SET;297 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order);298 299 return tape_do_io_free(device, request);300}301 302/*303 * IOCTL: Set KEKLs304 */305static int tape_3592_ioctl_kekl_set(struct tape_device *device,306 unsigned long arg)307{308 int rc;309 struct tape390_kekl_pair *ext_kekls;310 311 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n");312 if (!crypt_supported(device))313 return -ENOSYS;314 if (!crypt_enabled(device))315 return -EUNATCH;316 ext_kekls = memdup_user((char __user *)arg, sizeof(*ext_kekls));317 if (IS_ERR(ext_kekls))318 return PTR_ERR(ext_kekls);319 rc = tape_3592_kekl_set(device, ext_kekls);320 kfree(ext_kekls);321 return rc;322}323 324/*325 * Enable encryption326 */327static struct tape_request *__tape_3592_enable_crypt(struct tape_device *device)328{329 struct tape_request *request;330 char *data;331 332 DBF_EVENT(6, "tape_3592_enable_crypt\n");333 if (!crypt_supported(device))334 return ERR_PTR(-ENOSYS);335 request = tape_alloc_request(2, 72);336 if (IS_ERR(request))337 return request;338 data = request->cpdata;339 memset(data,0,72);340 341 data[0] = 0x05;342 data[36 + 0] = 0x03;343 data[36 + 1] = 0x03;344 data[36 + 4] = 0x40;345 data[36 + 6] = 0x01;346 data[36 + 14] = 0x2f;347 data[36 + 18] = 0xc3;348 data[36 + 35] = 0x72;349 request->op = TO_CRYPT_ON;350 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);351 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);352 return request;353}354 355static int tape_3592_enable_crypt(struct tape_device *device)356{357 struct tape_request *request;358 359 request = __tape_3592_enable_crypt(device);360 if (IS_ERR(request))361 return PTR_ERR(request);362 return tape_do_io_free(device, request);363}364 365static void tape_3592_enable_crypt_async(struct tape_device *device)366{367 struct tape_request *request;368 369 request = __tape_3592_enable_crypt(device);370 if (!IS_ERR(request))371 tape_do_io_async_free(device, request);372}373 374/*375 * Disable encryption376 */377static struct tape_request *__tape_3592_disable_crypt(struct tape_device *device)378{379 struct tape_request *request;380 char *data;381 382 DBF_EVENT(6, "tape_3592_disable_crypt\n");383 if (!crypt_supported(device))384 return ERR_PTR(-ENOSYS);385 request = tape_alloc_request(2, 72);386 if (IS_ERR(request))387 return request;388 data = request->cpdata;389 memset(data,0,72);390 391 data[0] = 0x05;392 data[36 + 0] = 0x03;393 data[36 + 1] = 0x03;394 data[36 + 35] = 0x32;395 396 request->op = TO_CRYPT_OFF;397 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data);398 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36);399 400 return request;401}402 403static int tape_3592_disable_crypt(struct tape_device *device)404{405 struct tape_request *request;406 407 request = __tape_3592_disable_crypt(device);408 if (IS_ERR(request))409 return PTR_ERR(request);410 return tape_do_io_free(device, request);411}412 413static void tape_3592_disable_crypt_async(struct tape_device *device)414{415 struct tape_request *request;416 417 request = __tape_3592_disable_crypt(device);418 if (!IS_ERR(request))419 tape_do_io_async_free(device, request);420}421 422/*423 * IOCTL: Set encryption status424 */425static int tape_3592_ioctl_crypt_set(struct tape_device *device,426 unsigned long arg)427{428 struct tape390_crypt_info info;429 430 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n");431 if (!crypt_supported(device))432 return -ENOSYS;433 if (copy_from_user(&info, (char __user *)arg, sizeof(info)))434 return -EFAULT;435 if (info.status & ~TAPE390_CRYPT_ON_MASK)436 return -EINVAL;437 if (info.status & TAPE390_CRYPT_ON_MASK)438 return tape_3592_enable_crypt(device);439 else440 return tape_3592_disable_crypt(device);441}442 443static int tape_3590_sense_medium(struct tape_device *device);444 445/*446 * IOCTL: Query enryption status447 */448static int tape_3592_ioctl_crypt_query(struct tape_device *device,449 unsigned long arg)450{451 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n");452 if (!crypt_supported(device))453 return -ENOSYS;454 tape_3590_sense_medium(device);455 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device),456 sizeof(TAPE_3590_CRYPT_INFO(device))))457 return -EFAULT;458 else459 return 0;460}461 462/*463 * 3590 IOCTL Overload464 */465static int466tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg)467{468 switch (cmd) {469 case TAPE390_DISPLAY: {470 struct display_struct disp;471 472 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp)))473 return -EFAULT;474 475 return tape_std_display(device, &disp);476 }477 case TAPE390_KEKL_SET:478 return tape_3592_ioctl_kekl_set(device, arg);479 case TAPE390_KEKL_QUERY:480 return tape_3592_ioctl_kekl_query(device, arg);481 case TAPE390_CRYPT_SET:482 return tape_3592_ioctl_crypt_set(device, arg);483 case TAPE390_CRYPT_QUERY:484 return tape_3592_ioctl_crypt_query(device, arg);485 default:486 return -EINVAL; /* no additional ioctls */487 }488}489 490/*491 * SENSE Medium: Get Sense data about medium state492 */493static int tape_3590_sense_medium(struct tape_device *device)494{495 struct tape_request *request;496 497 request = tape_alloc_request(1, 128);498 if (IS_ERR(request))499 return PTR_ERR(request);500 request->op = TO_MSEN;501 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);502 return tape_do_io_free(device, request);503}504 505static void tape_3590_sense_medium_async(struct tape_device *device)506{507 struct tape_request *request;508 509 request = tape_alloc_request(1, 128);510 if (IS_ERR(request))511 return;512 request->op = TO_MSEN;513 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata);514 tape_do_io_async_free(device, request);515}516 517/*518 * MTTELL: Tell block. Return the number of block relative to current file.519 */520static int521tape_3590_mttell(struct tape_device *device, int mt_count)522{523 __u64 block_id;524 int rc;525 526 rc = tape_std_read_block_id(device, &block_id);527 if (rc)528 return rc;529 return block_id >> 32;530}531 532/*533 * MTSEEK: seek to the specified block.534 */535static int536tape_3590_mtseek(struct tape_device *device, int count)537{538 struct tape_request *request;539 540 DBF_EVENT(6, "xsee id: %x\n", count);541 request = tape_alloc_request(3, 4);542 if (IS_ERR(request))543 return PTR_ERR(request);544 request->op = TO_LBL;545 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);546 *(__u32 *) request->cpdata = count;547 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);548 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);549 return tape_do_io_free(device, request);550}551 552/*553 * Read Opposite Error Recovery Function:554 * Used, when Read Forward does not work555 */556static void557tape_3590_read_opposite(struct tape_device *device,558 struct tape_request *request)559{560 struct tape_3590_disc_data *data;561 562 /*563 * We have allocated 4 ccws in tape_std_read, so we can now564 * transform the request to a read backward, followed by a565 * forward space block.566 */567 request->op = TO_RBA;568 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte);569 data = device->discdata;570 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op,571 device->char_data.idal_buf);572 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL);573 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL);574 DBF_EVENT(6, "xrop ccwg\n");575}576 577/*578 * Read Attention Msg579 * This should be done after an interrupt with attention bit (0x80)580 * in device state.581 *582 * After a "read attention message" request there are two possible583 * results:584 *585 * 1. A unit check is presented, when attention sense is present (e.g. when586 * a medium has been unloaded). The attention sense comes then587 * together with the unit check. The recovery action is either "retry"588 * (in case there is an attention message pending) or "permanent error".589 *590 * 2. The attention msg is written to the "read subsystem data" buffer.591 * In this case we probably should print it to the console.592 */593static void tape_3590_read_attmsg_async(struct tape_device *device)594{595 struct tape_request *request;596 char *buf;597 598 request = tape_alloc_request(3, 4096);599 if (IS_ERR(request))600 return;601 request->op = TO_READ_ATTMSG;602 buf = request->cpdata;603 buf[0] = PREP_RD_SS_DATA;604 buf[6] = RD_ATTMSG; /* read att msg */605 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf);606 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12);607 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL);608 tape_do_io_async_free(device, request);609}610 611/*612 * These functions are used to schedule follow-up actions from within an613 * interrupt context (like unsolicited interrupts).614 * Note: the work handler is called by the system work queue. The tape615 * commands started by the handler need to be asynchrounous, otherwise616 * a deadlock can occur e.g. in case of a deferred cc=1 (see __tape_do_irq).617 */618struct work_handler_data {619 struct tape_device *device;620 enum tape_op op;621 struct work_struct work;622};623 624static void625tape_3590_work_handler(struct work_struct *work)626{627 struct work_handler_data *p =628 container_of(work, struct work_handler_data, work);629 630 switch (p->op) {631 case TO_MSEN:632 tape_3590_sense_medium_async(p->device);633 break;634 case TO_READ_ATTMSG:635 tape_3590_read_attmsg_async(p->device);636 break;637 case TO_CRYPT_ON:638 tape_3592_enable_crypt_async(p->device);639 break;640 case TO_CRYPT_OFF:641 tape_3592_disable_crypt_async(p->device);642 break;643 default:644 DBF_EVENT(3, "T3590: work handler undefined for "645 "operation 0x%02x\n", p->op);646 }647 tape_put_device(p->device);648 kfree(p);649}650 651static int652tape_3590_schedule_work(struct tape_device *device, enum tape_op op)653{654 struct work_handler_data *p;655 656 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)657 return -ENOMEM;658 659 INIT_WORK(&p->work, tape_3590_work_handler);660 661 p->device = tape_get_device(device);662 p->op = op;663 664 queue_work(tape_3590_wq, &p->work);665 return 0;666}667 668static void tape_3590_med_state_set(struct tape_device *device,669 struct tape_3590_med_sense *sense)670{671 struct tape390_crypt_info *c_info;672 673 c_info = &TAPE_3590_CRYPT_INFO(device);674 675 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst);676 switch (sense->macst) {677 case 0x04:678 case 0x05:679 case 0x06:680 tape_med_state_set(device, MS_UNLOADED);681 TAPE_3590_CRYPT_INFO(device).medium_status = 0;682 return;683 case 0x08:684 case 0x09:685 tape_med_state_set(device, MS_LOADED);686 break;687 default:688 tape_med_state_set(device, MS_UNKNOWN);689 return;690 }691 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK;692 if (sense->flags & MSENSE_CRYPT_MASK) {693 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags);694 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK;695 } else {696 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags);697 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK;698 }699}700 701/*702 * The done handler is called at device/channel end and wakes up the sleeping703 * process704 */705static int706tape_3590_done(struct tape_device *device, struct tape_request *request)707{708 709 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]);710 711 switch (request->op) {712 case TO_BSB:713 case TO_BSF:714 case TO_DSE:715 case TO_FSB:716 case TO_FSF:717 case TO_LBL:718 case TO_RFO:719 case TO_RBA:720 case TO_REW:721 case TO_WRI:722 case TO_WTM:723 case TO_BLOCK:724 case TO_LOAD:725 tape_med_state_set(device, MS_LOADED);726 break;727 case TO_RUN:728 tape_med_state_set(device, MS_UNLOADED);729 tape_3590_schedule_work(device, TO_CRYPT_OFF);730 break;731 case TO_MSEN:732 tape_3590_med_state_set(device, request->cpdata);733 break;734 case TO_CRYPT_ON:735 TAPE_3590_CRYPT_INFO(device).status736 |= TAPE390_CRYPT_ON_MASK;737 *(device->modeset_byte) |= 0x03;738 break;739 case TO_CRYPT_OFF:740 TAPE_3590_CRYPT_INFO(device).status741 &= ~TAPE390_CRYPT_ON_MASK;742 *(device->modeset_byte) &= ~0x03;743 break;744 case TO_RBI: /* RBI seems to succeed even without medium loaded. */745 case TO_NOP: /* Same to NOP. */746 case TO_READ_CONFIG:747 case TO_READ_ATTMSG:748 case TO_DIS:749 case TO_ASSIGN:750 case TO_UNASSIGN:751 case TO_SIZE:752 case TO_KEKL_SET:753 case TO_KEKL_QUERY:754 case TO_RDC:755 break;756 }757 return TAPE_IO_SUCCESS;758}759 760/*761 * This function is called, when error recovery was successful762 */763static inline int764tape_3590_erp_succeeded(struct tape_device *device, struct tape_request *request)765{766 DBF_EVENT(3, "Error Recovery successful for %s\n",767 tape_op_verbose[request->op]);768 return tape_3590_done(device, request);769}770 771/*772 * This function is called, when error recovery was not successful773 */774static inline int775tape_3590_erp_failed(struct tape_device *device, struct tape_request *request,776 struct irb *irb, int rc)777{778 DBF_EVENT(3, "Error Recovery failed for %s\n",779 tape_op_verbose[request->op]);780 tape_dump_sense_dbf(device, request, irb);781 return rc;782}783 784/*785 * Error Recovery do retry786 */787static inline int788tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,789 struct irb *irb)790{791 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);792 tape_dump_sense_dbf(device, request, irb);793 return TAPE_IO_RETRY;794}795 796/*797 * Handle unsolicited interrupts798 */799static int800tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)801{802 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END)803 /* Probably result of halt ssch */804 return TAPE_IO_PENDING;805 else if (irb->scsw.cmd.dstat == 0x85)806 /* Device Ready */807 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id);808 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {809 tape_3590_schedule_work(device, TO_READ_ATTMSG);810 } else {811 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);812 tape_dump_sense_dbf(device, NULL, irb);813 }814 /* check medium state */815 tape_3590_schedule_work(device, TO_MSEN);816 return TAPE_IO_SUCCESS;817}818 819/*820 * Basic Recovery routine821 */822static int823tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,824 struct irb *irb, int rc)825{826 struct tape_3590_sense *sense;827 828 sense = (struct tape_3590_sense *) irb->ecw;829 830 switch (sense->bra) {831 case SENSE_BRA_PER:832 return tape_3590_erp_failed(device, request, irb, rc);833 case SENSE_BRA_CONT:834 return tape_3590_erp_succeeded(device, request);835 case SENSE_BRA_RE:836 return tape_3590_erp_retry(device, request, irb);837 case SENSE_BRA_DRE:838 return tape_3590_erp_failed(device, request, irb, rc);839 default:840 BUG();841 return TAPE_IO_STOP;842 }843}844 845/*846 * RDL: Read Device (buffered) log847 */848static int849tape_3590_erp_read_buf_log(struct tape_device *device,850 struct tape_request *request, struct irb *irb)851{852 /*853 * We just do the basic error recovery at the moment (retry).854 * Perhaps in the future, we read the log and dump it somewhere...855 */856 return tape_3590_erp_basic(device, request, irb, -EIO);857}858 859/*860 * SWAP: Swap Devices861 */862static int863tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,864 struct irb *irb)865{866 /*867 * This error recovery should swap the tapes868 * if the original has a problem. The operation869 * should proceed with the new tape... this870 * should probably be done in user space!871 */872 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a "873 "different tape unit\n");874 return tape_3590_erp_basic(device, request, irb, -EIO);875}876 877/*878 * LBY: Long Busy879 */880static int881tape_3590_erp_long_busy(struct tape_device *device,882 struct tape_request *request, struct irb *irb)883{884 DBF_EVENT(6, "Device is busy\n");885 return TAPE_IO_LONG_BUSY;886}887 888/*889 * SPI: Special Intercept890 */891static int892tape_3590_erp_special_interrupt(struct tape_device *device,893 struct tape_request *request, struct irb *irb)894{895 return tape_3590_erp_basic(device, request, irb, -EIO);896}897 898/*899 * RDA: Read Alternate900 */901static int902tape_3590_erp_read_alternate(struct tape_device *device,903 struct tape_request *request, struct irb *irb)904{905 struct tape_3590_disc_data *data;906 907 /*908 * The issued Read Backward or Read Previous command is not909 * supported by the device910 * The recovery action should be to issue another command:911 * Read Revious: if Read Backward is not supported912 * Read Backward: if Read Previous is not supported913 */914 data = device->discdata;915 if (data->read_back_op == READ_PREVIOUS) {916 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",917 device->cdev_id);918 data->read_back_op = READ_BACKWARD;919 } else {920 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",921 device->cdev_id);922 data->read_back_op = READ_PREVIOUS;923 }924 tape_3590_read_opposite(device, request);925 return tape_3590_erp_retry(device, request, irb);926}927 928/*929 * Error Recovery read opposite930 */931static int932tape_3590_erp_read_opposite(struct tape_device *device,933 struct tape_request *request, struct irb *irb)934{935 switch (request->op) {936 case TO_RFO:937 /*938 * We did read forward, but the data could not be read.939 * We will read backward and then skip forward again.940 */941 tape_3590_read_opposite(device, request);942 return tape_3590_erp_retry(device, request, irb);943 case TO_RBA:944 /* We tried to read forward and backward, but hat no success */945 return tape_3590_erp_failed(device, request, irb, -EIO);946 break;947 default:948 return tape_3590_erp_failed(device, request, irb, -EIO);949 }950}951 952/*953 * Print an MIM (Media Information Message) (message code f0)954 */955static void956tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)957{958 struct tape_3590_sense *sense;959 char *exception, *service;960 961 exception = kmalloc(BUFSIZE, GFP_ATOMIC);962 service = kmalloc(BUFSIZE, GFP_ATOMIC);963 964 if (!exception || !service)965 goto out_nomem;966 967 sense = (struct tape_3590_sense *) irb->ecw;968 /* Exception Message */969 switch (sense->fmt.f70.emc) {970 case 0x02:971 snprintf(exception, BUFSIZE, "Data degraded");972 break;973 case 0x03:974 snprintf(exception, BUFSIZE, "Data degraded in partition %i",975 sense->fmt.f70.mp);976 break;977 case 0x04:978 snprintf(exception, BUFSIZE, "Medium degraded");979 break;980 case 0x05:981 snprintf(exception, BUFSIZE, "Medium degraded in partition %i",982 sense->fmt.f70.mp);983 break;984 case 0x06:985 snprintf(exception, BUFSIZE, "Block 0 Error");986 break;987 case 0x07:988 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x",989 sense->fmt.f70.md);990 break;991 default:992 snprintf(exception, BUFSIZE, "0x%02x",993 sense->fmt.f70.emc);994 break;995 }996 /* Service Message */997 switch (sense->fmt.f70.smc) {998 case 0x02:999 snprintf(service, BUFSIZE, "Reference Media maintenance "1000 "procedure %i", sense->fmt.f70.md);1001 break;1002 default:1003 snprintf(service, BUFSIZE, "0x%02x",1004 sense->fmt.f70.smc);1005 break;1006 }1007 1008 dev_warn (&device->cdev->dev, "Tape media information: exception %s, "1009 "service %s\n", exception, service);1010 1011out_nomem:1012 kfree(exception);1013 kfree(service);1014}1015 1016/*1017 * Print an I/O Subsystem Service Information Message (message code f1)1018 */1019static void1020tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)1021{1022 struct tape_3590_sense *sense;1023 char *exception, *service;1024 1025 exception = kmalloc(BUFSIZE, GFP_ATOMIC);1026 service = kmalloc(BUFSIZE, GFP_ATOMIC);1027 1028 if (!exception || !service)1029 goto out_nomem;1030 1031 sense = (struct tape_3590_sense *) irb->ecw;1032 /* Exception Message */1033 switch (sense->fmt.f71.emc) {1034 case 0x01:1035 snprintf(exception, BUFSIZE, "Effect of failure is unknown");1036 break;1037 case 0x02:1038 snprintf(exception, BUFSIZE, "CU Exception - no performance "1039 "impact");1040 break;1041 case 0x03:1042 snprintf(exception, BUFSIZE, "CU Exception on channel "1043 "interface 0x%02x", sense->fmt.f71.md[0]);1044 break;1045 case 0x04:1046 snprintf(exception, BUFSIZE, "CU Exception on device path "1047 "0x%02x", sense->fmt.f71.md[0]);1048 break;1049 case 0x05:1050 snprintf(exception, BUFSIZE, "CU Exception on library path "1051 "0x%02x", sense->fmt.f71.md[0]);1052 break;1053 case 0x06:1054 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x",1055 sense->fmt.f71.md[0]);1056 break;1057 case 0x07:1058 snprintf(exception, BUFSIZE, "CU Exception on partition "1059 "0x%02x", sense->fmt.f71.md[0]);1060 break;1061 default:1062 snprintf(exception, BUFSIZE, "0x%02x",1063 sense->fmt.f71.emc);1064 }1065 /* Service Message */1066 switch (sense->fmt.f71.smc) {1067 case 0x01:1068 snprintf(service, BUFSIZE, "Repair impact is unknown");1069 break;1070 case 0x02:1071 snprintf(service, BUFSIZE, "Repair will not impact cu "1072 "performance");1073 break;1074 case 0x03:1075 if (sense->fmt.f71.mdf == 0)1076 snprintf(service, BUFSIZE, "Repair will disable node "1077 "0x%x on CU", sense->fmt.f71.md[1]);1078 else1079 snprintf(service, BUFSIZE, "Repair will disable "1080 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1],1081 sense->fmt.f71.md[2]);1082 break;1083 case 0x04:1084 if (sense->fmt.f71.mdf == 0)1085 snprintf(service, BUFSIZE, "Repair will disable "1086 "channel path 0x%x on CU",1087 sense->fmt.f71.md[1]);1088 else1089 snprintf(service, BUFSIZE, "Repair will disable channel"1090 " paths (0x%x-0x%x) on CU",1091 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1092 break;1093 case 0x05:1094 if (sense->fmt.f71.mdf == 0)1095 snprintf(service, BUFSIZE, "Repair will disable device"1096 " path 0x%x on CU", sense->fmt.f71.md[1]);1097 else1098 snprintf(service, BUFSIZE, "Repair will disable device"1099 " paths (0x%x-0x%x) on CU",1100 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1101 break;1102 case 0x06:1103 if (sense->fmt.f71.mdf == 0)1104 snprintf(service, BUFSIZE, "Repair will disable "1105 "library path 0x%x on CU",1106 sense->fmt.f71.md[1]);1107 else1108 snprintf(service, BUFSIZE, "Repair will disable "1109 "library paths (0x%x-0x%x) on CU",1110 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1111 break;1112 case 0x07:1113 snprintf(service, BUFSIZE, "Repair will disable access to CU");1114 break;1115 default:1116 snprintf(service, BUFSIZE, "0x%02x",1117 sense->fmt.f71.smc);1118 }1119 1120 dev_warn (&device->cdev->dev, "I/O subsystem information: exception"1121 " %s, service %s\n", exception, service);1122out_nomem:1123 kfree(exception);1124 kfree(service);1125}1126 1127/*1128 * Print an Device Subsystem Service Information Message (message code f2)1129 */1130static void1131tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)1132{1133 struct tape_3590_sense *sense;1134 char *exception, *service;1135 1136 exception = kmalloc(BUFSIZE, GFP_ATOMIC);1137 service = kmalloc(BUFSIZE, GFP_ATOMIC);1138 1139 if (!exception || !service)1140 goto out_nomem;1141 1142 sense = (struct tape_3590_sense *) irb->ecw;1143 /* Exception Message */1144 switch (sense->fmt.f71.emc) {1145 case 0x01:1146 snprintf(exception, BUFSIZE, "Effect of failure is unknown");1147 break;1148 case 0x02:1149 snprintf(exception, BUFSIZE, "DV Exception - no performance"1150 " impact");1151 break;1152 case 0x03:1153 snprintf(exception, BUFSIZE, "DV Exception on channel "1154 "interface 0x%02x", sense->fmt.f71.md[0]);1155 break;1156 case 0x04:1157 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x",1158 sense->fmt.f71.md[0]);1159 break;1160 case 0x05:1161 snprintf(exception, BUFSIZE, "DV Exception on message display"1162 " 0x%02x", sense->fmt.f71.md[0]);1163 break;1164 case 0x06:1165 snprintf(exception, BUFSIZE, "DV Exception in tape path");1166 break;1167 case 0x07:1168 snprintf(exception, BUFSIZE, "DV Exception in drive");1169 break;1170 default:1171 snprintf(exception, BUFSIZE, "0x%02x",1172 sense->fmt.f71.emc);1173 }1174 /* Service Message */1175 switch (sense->fmt.f71.smc) {1176 case 0x01:1177 snprintf(service, BUFSIZE, "Repair impact is unknown");1178 break;1179 case 0x02:1180 snprintf(service, BUFSIZE, "Repair will not impact device "1181 "performance");1182 break;1183 case 0x03:1184 if (sense->fmt.f71.mdf == 0)1185 snprintf(service, BUFSIZE, "Repair will disable "1186 "channel path 0x%x on DV",1187 sense->fmt.f71.md[1]);1188 else1189 snprintf(service, BUFSIZE, "Repair will disable "1190 "channel path (0x%x-0x%x) on DV",1191 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1192 break;1193 case 0x04:1194 if (sense->fmt.f71.mdf == 0)1195 snprintf(service, BUFSIZE, "Repair will disable "1196 "interface 0x%x on DV", sense->fmt.f71.md[1]);1197 else1198 snprintf(service, BUFSIZE, "Repair will disable "1199 "interfaces (0x%x-0x%x) on DV",1200 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1201 break;1202 case 0x05:1203 if (sense->fmt.f71.mdf == 0)1204 snprintf(service, BUFSIZE, "Repair will disable loader"1205 " 0x%x on DV", sense->fmt.f71.md[1]);1206 else1207 snprintf(service, BUFSIZE, "Repair will disable loader"1208 " (0x%x-0x%x) on DV",1209 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1210 break;1211 case 0x07:1212 snprintf(service, BUFSIZE, "Repair will disable access to DV");1213 break;1214 case 0x08:1215 if (sense->fmt.f71.mdf == 0)1216 snprintf(service, BUFSIZE, "Repair will disable "1217 "message display 0x%x on DV",1218 sense->fmt.f71.md[1]);1219 else1220 snprintf(service, BUFSIZE, "Repair will disable "1221 "message displays (0x%x-0x%x) on DV",1222 sense->fmt.f71.md[1], sense->fmt.f71.md[2]);1223 break;1224 case 0x09:1225 snprintf(service, BUFSIZE, "Clean DV");1226 break;1227 default:1228 snprintf(service, BUFSIZE, "0x%02x",1229 sense->fmt.f71.smc);1230 }1231 1232 dev_warn (&device->cdev->dev, "Device subsystem information: exception"1233 " %s, service %s\n", exception, service);1234out_nomem:1235 kfree(exception);1236 kfree(service);1237}1238 1239/*1240 * Print standard ERA Message1241 */1242static void1243tape_3590_print_era_msg(struct tape_device *device, struct irb *irb)1244{1245 struct tape_3590_sense *sense;1246 1247 sense = (struct tape_3590_sense *) irb->ecw;1248 if (sense->mc == 0)1249 return;1250 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) {1251 if (tape_3590_msg[sense->mc] != NULL)1252 dev_warn (&device->cdev->dev, "The tape unit has "1253 "issued sense message %s\n",1254 tape_3590_msg[sense->mc]);1255 else1256 dev_warn (&device->cdev->dev, "The tape unit has "1257 "issued an unknown sense message code 0x%x\n",1258 sense->mc);1259 return;1260 }1261 if (sense->mc == 0xf0) {1262 /* Standard Media Information Message */1263 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, "1264 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc,1265 sense->fmt.f70.emc, sense->fmt.f70.smc,1266 sense->fmt.f70.refcode, sense->fmt.f70.mid,1267 sense->fmt.f70.fid);1268 tape_3590_print_mim_msg_f0(device, irb);1269 return;1270 }1271 if (sense->mc == 0xf1) {1272 /* Standard I/O Subsystem Service Information Message */1273 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x,"1274 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",1275 sense->fmt.f71.sev, device->cdev->id.dev_model,1276 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,1277 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,1278 sense->fmt.f71.refcode3);1279 tape_3590_print_io_sim_msg_f1(device, irb);1280 return;1281 }1282 if (sense->mc == 0xf2) {1283 /* Standard Device Service Information Message */1284 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x"1285 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n",1286 sense->fmt.f71.sev, device->cdev->id.dev_model,1287 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc,1288 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2,1289 sense->fmt.f71.refcode3);1290 tape_3590_print_dev_sim_msg_f2(device, irb);1291 return;1292 }1293 if (sense->mc == 0xf3) {1294 /* Standard Library Service Information Message */1295 return;1296 }1297 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown "1298 "sense message code %x\n", sense->mc);1299}1300 1301static int tape_3590_crypt_error(struct tape_device *device,1302 struct tape_request *request, struct irb *irb)1303{1304 u8 cu_rc;1305 u16 ekm_rc2;1306 char *sense;1307 1308 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data;1309 cu_rc = sense[0];1310 ekm_rc2 = *((u16*) &sense[10]);1311 if ((cu_rc == 0) && (ekm_rc2 == 0xee31))1312 /* key not defined on EKM */1313 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED);1314 if ((cu_rc == 1) || (cu_rc == 2))1315 /* No connection to EKM */1316 return tape_3590_erp_basic(device, request, irb, -ENOTCONN);1317 1318 dev_err (&device->cdev->dev, "The tape unit failed to obtain the "1319 "encryption key from EKM\n");1320 1321 return tape_3590_erp_basic(device, request, irb, -ENOKEY);1322}1323 1324/*1325 * 3590 error Recovery routine:1326 * If possible, it tries to recover from the error. If this is not possible,1327 * inform the user about the problem.1328 */1329static int1330tape_3590_unit_check(struct tape_device *device, struct tape_request *request,1331 struct irb *irb)1332{1333 struct tape_3590_sense *sense;1334 1335 sense = (struct tape_3590_sense *) irb->ecw;1336 1337 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);1338 1339 /*1340 * First check all RC-QRCs where we want to do something special1341 * - "break": basic error recovery is done1342 * - "goto out:": just print error message if available1343 */1344 switch (sense->rc_rqc) {1345 1346 case 0x1110:1347 tape_3590_print_era_msg(device, irb);1348 return tape_3590_erp_read_buf_log(device, request, irb);1349 1350 case 0x2011:1351 tape_3590_print_era_msg(device, irb);1352 return tape_3590_erp_read_alternate(device, request, irb);1353 1354 case 0x2230:1355 case 0x2231:1356 tape_3590_print_era_msg(device, irb);1357 return tape_3590_erp_special_interrupt(device, request, irb);1358 case 0x2240:1359 return tape_3590_crypt_error(device, request, irb);1360 1361 case 0x3010:1362 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n",1363 device->cdev_id);1364 return tape_3590_erp_basic(device, request, irb, -ENOSPC);1365 case 0x3012:1366 DBF_EVENT(2, "(%08x): Forward at End of Partition\n",1367 device->cdev_id);1368 return tape_3590_erp_basic(device, request, irb, -ENOSPC);1369 case 0x3020:1370 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id);1371 return tape_3590_erp_basic(device, request, irb, -ENOSPC);1372 1373 case 0x3122:1374 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n",1375 device->cdev_id);1376 return tape_3590_erp_basic(device, request, irb, -EIO);1377 case 0x3123:1378 DBF_EVENT(2, "(%08x): Rewind Unload complete\n",1379 device->cdev_id);1380 tape_med_state_set(device, MS_UNLOADED);1381 tape_3590_schedule_work(device, TO_CRYPT_OFF);1382 return tape_3590_erp_basic(device, request, irb, 0);1383 1384 case 0x4010:1385 /*1386 * print additional msg since default msg1387 * "device intervention" is not very meaningfull1388 */1389 tape_med_state_set(device, MS_UNLOADED);1390 tape_3590_schedule_work(device, TO_CRYPT_OFF);1391 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);1392 case 0x4012: /* Device Long Busy */1393 /* XXX: Also use long busy handling here? */1394 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id);1395 tape_3590_print_era_msg(device, irb);1396 return tape_3590_erp_basic(device, request, irb, -EBUSY);1397 case 0x4014:1398 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id);1399 return tape_3590_erp_long_busy(device, request, irb);1400 1401 case 0x5010:1402 if (sense->rac == 0xd0) {1403 /* Swap */1404 tape_3590_print_era_msg(device, irb);1405 return tape_3590_erp_swap(device, request, irb);1406 }1407 if (sense->rac == 0x26) {1408 /* Read Opposite */1409 tape_3590_print_era_msg(device, irb);1410 return tape_3590_erp_read_opposite(device, request,1411 irb);1412 }1413 return tape_3590_erp_basic(device, request, irb, -EIO);1414 case 0x5020:1415 case 0x5021:1416 case 0x5022:1417 case 0x5040:1418 case 0x5041:1419 case 0x5042:1420 tape_3590_print_era_msg(device, irb);1421 return tape_3590_erp_swap(device, request, irb);1422 1423 case 0x5110:1424 case 0x5111:1425 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);1426 1427 case 0x5120:1428 case 0x1120:1429 tape_med_state_set(device, MS_UNLOADED);1430 tape_3590_schedule_work(device, TO_CRYPT_OFF);1431 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM);1432 1433 case 0x6020:1434 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE);1435 1436 case 0x8011:1437 return tape_3590_erp_basic(device, request, irb, -EPERM);1438 case 0x8013:1439 dev_warn (&device->cdev->dev, "A different host has privileged"1440 " access to the tape unit\n");1441 return tape_3590_erp_basic(device, request, irb, -EPERM);1442 default:1443 return tape_3590_erp_basic(device, request, irb, -EIO);1444 }1445}1446 1447/*1448 * 3590 interrupt handler:1449 */1450static int1451tape_3590_irq(struct tape_device *device, struct tape_request *request,1452 struct irb *irb)1453{1454 if (request == NULL)1455 return tape_3590_unsolicited_irq(device, irb);1456 1457 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) &&1458 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) &&1459 (request->op == TO_WRI)) {1460 /* Write at end of volume */1461 DBF_EVENT(2, "End of volume\n");1462 return tape_3590_erp_failed(device, request, irb, -ENOSPC);1463 }1464 1465 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK)1466 return tape_3590_unit_check(device, request, irb);1467 1468 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) {1469 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) {1470 if (request->op == TO_FSB || request->op == TO_BSB)1471 request->rescnt++;1472 else1473 DBF_EVENT(5, "Unit Exception!\n");1474 }1475 1476 return tape_3590_done(device, request);1477 }1478 1479 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) {1480 DBF_EVENT(2, "channel end\n");1481 return TAPE_IO_PENDING;1482 }1483 1484 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) {1485 DBF_EVENT(2, "Unit Attention when busy..\n");1486 return TAPE_IO_PENDING;1487 }1488 1489 DBF_EVENT(6, "xunknownirq\n");1490 tape_dump_sense_dbf(device, request, irb);1491 return TAPE_IO_STOP;1492}1493 1494 1495static int tape_3590_read_dev_chars(struct tape_device *device,1496 struct tape_3590_rdc_data *rdc_data)1497{1498 int rc;1499 struct tape_request *request;1500 1501 request = tape_alloc_request(1, sizeof(*rdc_data));1502 if (IS_ERR(request))1503 return PTR_ERR(request);1504 request->op = TO_RDC;1505 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data),1506 request->cpdata);1507 rc = tape_do_io(device, request);1508 if (rc == 0)1509 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data));1510 tape_free_request(request);1511 return rc;1512}1513 1514/*1515 * Setup device function1516 */1517static int1518tape_3590_setup_device(struct tape_device *device)1519{1520 int rc;1521 struct tape_3590_disc_data *data;1522 struct tape_3590_rdc_data *rdc_data;1523 1524 DBF_EVENT(6, "3590 device setup\n");1525 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA);1526 if (data == NULL)1527 return -ENOMEM;1528 data->read_back_op = READ_PREVIOUS;1529 device->discdata = data;1530 1531 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA);1532 if (!rdc_data) {1533 rc = -ENOMEM;1534 goto fail_kmalloc;1535 }1536 rc = tape_3590_read_dev_chars(device, rdc_data);1537 if (rc) {1538 DBF_LH(3, "Read device characteristics failed!\n");1539 goto fail_rdc_data;1540 }1541 rc = tape_std_assign(device);1542 if (rc)1543 goto fail_rdc_data;1544 if (rdc_data->data[31] == 0x13) {1545 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK;1546 tape_3592_disable_crypt(device);1547 } else {1548 DBF_EVENT(6, "Device has NO crypto support\n");1549 }1550 /* Try to find out if medium is loaded */1551 rc = tape_3590_sense_medium(device);1552 if (rc) {1553 DBF_LH(3, "3590 medium sense returned %d\n", rc);1554 goto fail_rdc_data;1555 }1556 return 0;1557 1558fail_rdc_data:1559 kfree(rdc_data);1560fail_kmalloc:1561 kfree(data);1562 return rc;1563}1564 1565/*1566 * Cleanup device function1567 */1568static void1569tape_3590_cleanup_device(struct tape_device *device)1570{1571 flush_workqueue(tape_3590_wq);1572 tape_std_unassign(device);1573 1574 kfree(device->discdata);1575 device->discdata = NULL;1576}1577 1578/*1579 * List of 3590 magnetic tape commands.1580 */1581static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = {1582 [MTRESET] = tape_std_mtreset,1583 [MTFSF] = tape_std_mtfsf,1584 [MTBSF] = tape_std_mtbsf,1585 [MTFSR] = tape_std_mtfsr,1586 [MTBSR] = tape_std_mtbsr,1587 [MTWEOF] = tape_std_mtweof,1588 [MTREW] = tape_std_mtrew,1589 [MTOFFL] = tape_std_mtoffl,1590 [MTNOP] = tape_std_mtnop,1591 [MTRETEN] = tape_std_mtreten,1592 [MTBSFM] = tape_std_mtbsfm,1593 [MTFSFM] = tape_std_mtfsfm,1594 [MTEOM] = tape_std_mteom,1595 [MTERASE] = tape_std_mterase,1596 [MTRAS1] = NULL,1597 [MTRAS2] = NULL,1598 [MTRAS3] = NULL,1599 [MTSETBLK] = tape_std_mtsetblk,1600 [MTSETDENSITY] = NULL,1601 [MTSEEK] = tape_3590_mtseek,1602 [MTTELL] = tape_3590_mttell,1603 [MTSETDRVBUFFER] = NULL,1604 [MTFSS] = NULL,1605 [MTBSS] = NULL,1606 [MTWSM] = NULL,1607 [MTLOCK] = NULL,1608 [MTUNLOCK] = NULL,1609 [MTLOAD] = tape_std_mtload,1610 [MTUNLOAD] = tape_std_mtunload,1611 [MTCOMPRESSION] = tape_std_mtcompression,1612 [MTSETPART] = NULL,1613 [MTMKPART] = NULL1614};1615 1616/*1617 * Tape discipline structure for 3590.1618 */1619static struct tape_discipline tape_discipline_3590 = {1620 .owner = THIS_MODULE,1621 .setup_device = tape_3590_setup_device,1622 .cleanup_device = tape_3590_cleanup_device,1623 .process_eov = tape_std_process_eov,1624 .irq = tape_3590_irq,1625 .read_block = tape_std_read_block,1626 .write_block = tape_std_write_block,1627 .ioctl_fn = tape_3590_ioctl,1628 .mtop_array = tape_3590_mtop1629};1630 1631static struct ccw_device_id tape_3590_ids[] = {1632 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590},1633 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592},1634 { /* end of list */ }1635};1636 1637static int1638tape_3590_online(struct ccw_device *cdev)1639{1640 return tape_generic_online(dev_get_drvdata(&cdev->dev),1641 &tape_discipline_3590);1642}1643 1644static struct ccw_driver tape_3590_driver = {1645 .driver = {1646 .name = "tape_3590",1647 .owner = THIS_MODULE,1648 },1649 .ids = tape_3590_ids,1650 .probe = tape_generic_probe,1651 .remove = tape_generic_remove,1652 .set_offline = tape_generic_offline,1653 .set_online = tape_3590_online,1654 .int_class = IRQIO_TAP,1655};1656 1657/*1658 * Setup discipline structure.1659 */1660static int1661tape_3590_init(void)1662{1663 int rc;1664 1665 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long));1666 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view);1667#ifdef DBF_LIKE_HELL1668 debug_set_level(TAPE_DBF_AREA, 6);1669#endif1670 1671 DBF_EVENT(3, "3590 init\n");1672 1673 tape_3590_wq = alloc_workqueue("tape_3590", 0, 0);1674 if (!tape_3590_wq)1675 return -ENOMEM;1676 1677 /* Register driver for 3590 tapes. */1678 rc = ccw_driver_register(&tape_3590_driver);1679 if (rc) {1680 destroy_workqueue(tape_3590_wq);1681 DBF_EVENT(3, "3590 init failed\n");1682 } else1683 DBF_EVENT(3, "3590 registered\n");1684 return rc;1685}1686 1687static void1688tape_3590_exit(void)1689{1690 ccw_driver_unregister(&tape_3590_driver);1691 destroy_workqueue(tape_3590_wq);1692 debug_unregister(TAPE_DBF_AREA);1693}1694 1695MODULE_DEVICE_TABLE(ccw, tape_3590_ids);1696MODULE_AUTHOR("(C) 2001,2006 IBM Corporation");1697MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver");1698MODULE_LICENSE("GPL");1699 1700module_init(tape_3590_init);1701module_exit(tape_3590_exit);1702