drivers/ieee1394/highlevel.c

   1 /*
   2  * IEEE 1394 for Linux
   3  *
   4  * Copyright (C) 1999 Andreas E. Bombe
   5  *
   6  * This code is licensed under the GPL.  See the file COPYING in the root
   7  * directory of the kernel sources for details.
   8  *
   9  *
  10  * Contributions:
  11  *
  12  * Christian Toegel <christian.toegel@gmx.at>
  13  *        unregister address space
  14  *
  15  * Manfred Weihs <weihs@ict.tuwien.ac.at>
  16  *        unregister address space
  17  *
  18  */
  19
  20 #include <linux/config.h>
  21 #include <linux/slab.h>
  22 #include <linux/list.h>
  23 #include <linux/bitops.h>
  24
  25 #include "ieee1394.h"
  26 #include "ieee1394_types.h"
  27 #include "hosts.h"
  28 #include "ieee1394_core.h"
  29 #include "highlevel.h"
  30 #include "nodemgr.h"
  31
  32
  33 struct hl_host_info {
  34         struct list_head list;
  35         struct hpsb_host *host;
  36         size_t size;
  37         unsigned long key;
  38         void *data;
  39 };
  40
  41
  42 static LIST_HEAD(hl_drivers);
  43 static DECLARE_RWSEM(hl_drivers_sem);
  44
  45 static LIST_HEAD(hl_irqs);
  46 static rwlock_t hl_irqs_lock = RW_LOCK_UNLOCKED;
  47
  48 static rwlock_t addr_space_lock = RW_LOCK_UNLOCKED;
  49
  50 /* addr_space list will have zero and max already included as bounds */
  51 static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
  52 static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
  53
  54
  55 static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
  56                                               struct hpsb_host *host)
  57 {
  58         struct hl_host_info *hi = NULL;
  59
  60         if (!hl || !host)
  61                 return NULL;
  62
  63         read_lock(&hl->host_info_lock);
  64         list_for_each_entry(hi, &hl->host_info_list, list) {
  65                 if (hi->host == host) {
  66                         read_unlock(&hl->host_info_lock);
  67                         return hi;
  68                 }
  69         }
  70         read_unlock(&hl->host_info_lock);
  71
  72         return NULL;
  73 }
  74
  75
  76 /* Returns a per host/driver data structure that was previously stored by
  77  * hpsb_create_hostinfo. */
  78 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
  79 {
  80         struct hl_host_info *hi = hl_get_hostinfo(hl, host);
  81
  82         if (hi)
  83                 return hi->data;
  84
  85         return NULL;
  86 }
  87
  88
  89 /* If size is zero, then the return here is only valid for error checking */
  90 void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
  91                            size_t data_size)
  92 {
  93         struct hl_host_info *hi;
  94         void *data;
  95         unsigned long flags;
  96
  97         hi = hl_get_hostinfo(hl, host);
  98         if (hi) {
  99                 HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists",
 100                          hl->name);
 101                 return NULL;
 102         }
 103
 104         hi = kmalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
 105         if (!hi)
 106                 return NULL;
 107
 108         memset(hi, 0, sizeof(*hi) + data_size);
 109
 110         if (data_size) {
 111                 data = hi->data = hi + 1;
 112                 hi->size = data_size;
 113         } else
 114                 data = hi;
 115
 116         hi->host = host;
 117
 118         write_lock_irqsave(&hl->host_info_lock, flags);
 119         list_add_tail(&hi->list, &hl->host_info_list);
 120         write_unlock_irqrestore(&hl->host_info_lock, flags);
 121
 122         return data;
 123 }
 124
 125
 126 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 127                       void *data)
 128 {
 129         struct hl_host_info *hi;
 130
 131         hi = hl_get_hostinfo(hl, host);
 132         if (hi) {
 133                 if (!hi->size && !hi->data) {
 134                         hi->data = data;
 135                         return 0;
 136                 } else
 137                         HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
 138                                  hl->name);
 139         } else
 140                 HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
 141                          hl->name);
 142
 143         return -EINVAL;
 144 }
 145
 146
 147 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
 148 {
 149         struct hl_host_info *hi;
 150
 151         hi = hl_get_hostinfo(hl, host);
 152         if (hi) {
 153                 unsigned long flags;
 154                 write_lock_irqsave(&hl->host_info_lock, flags);
 155                 list_del(&hi->list);
 156                 write_unlock_irqrestore(&hl->host_info_lock, flags);
 157                 kfree(hi);
 158         }
 159
 160         return;
 161 }
 162
 163
 164 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key)
 165 {
 166         struct hl_host_info *hi;
 167
 168         hi = hl_get_hostinfo(hl, host);
 169         if (hi)
 170                 hi->key = key;
 171
 172         return;
 173 }
 174
 175
 176 unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host)
 177 {
 178         struct hl_host_info *hi;
 179
 180         hi = hl_get_hostinfo(hl, host);
 181         if (hi)
 182                 return hi->key;
 183
 184         return 0;
 185 }
 186
 187
 188 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
 189 {
 190         struct hl_host_info *hi;
 191         void *data = NULL;
 192
 193         if (!hl)
 194                 return NULL;
 195
 196         read_lock(&hl->host_info_lock);
 197         list_for_each_entry(hi, &hl->host_info_list, list) {
 198                 if (hi->key == key) {
 199                         data = hi->data;
 200                         break;
 201                 }
 202         }
 203         read_unlock(&hl->host_info_lock);
 204
 205         return data;
 206 }
 207
 208
 209 struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, unsigned long key)
 210 {
 211         struct hl_host_info *hi;
 212         struct hpsb_host *host = NULL;
 213
 214         if (!hl)
 215                 return NULL;
 216
 217         read_lock(&hl->host_info_lock);
 218         list_for_each_entry(hi, &hl->host_info_list, list) {
 219                 if (hi->key == key) {
 220                         host = hi->host;
 221                         break;
 222                 }
 223         }
 224         read_unlock(&hl->host_info_lock);
 225
 226         return host;
 227 }
 228
 229 static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data)
 230 {
 231         struct hpsb_highlevel *hl = __data;
 232
 233         hl->add_host(host);
 234
 235         if (host->update_config_rom) {
 236                 if (hpsb_update_config_rom_image(host) < 0) {
 237                         HPSB_ERR("Failed to generate Configuration ROM image for host "
 238                                  "%s-%d", hl->name, host->id);
 239                 }
 240         }
 241
 242         return 0;
 243 }
 244
 245 void hpsb_register_highlevel(struct hpsb_highlevel *hl)
 246 {
 247         INIT_LIST_HEAD(&hl->addr_list);
 248         INIT_LIST_HEAD(&hl->host_info_list);
 249
 250         rwlock_init(&hl->host_info_lock);
 251
 252         down_write(&hl_drivers_sem);
 253         list_add_tail(&hl->hl_list, &hl_drivers);
 254         up_write(&hl_drivers_sem);
 255
 256         write_lock(&hl_irqs_lock);
 257         list_add_tail(&hl->irq_list, &hl_irqs);
 258         write_unlock(&hl_irqs_lock);
 259
 260         if (hl->add_host)
 261                 nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
 262
 263         return;
 264 }
 265
 266 static void __delete_addr(struct hpsb_address_serve *as)
 267 {
 268         list_del(&as->host_list);
 269         list_del(&as->hl_list);
 270         kfree(as);
 271 }
 272
 273 static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, int update_cr)
 274 {
 275         unsigned long flags;
 276         struct list_head *lh, *next;
 277         struct hpsb_address_serve *as;
 278
 279         /* First, let the highlevel driver unreg */
 280         if (hl->remove_host)
 281                 hl->remove_host(host);
 282
 283         /* Remove any addresses that are matched for this highlevel driver
 284          * and this particular host. */
 285         write_lock_irqsave(&addr_space_lock, flags);
 286         list_for_each_safe (lh, next, &hl->addr_list) {
 287                 as = list_entry(lh, struct hpsb_address_serve, hl_list);
 288
 289                 if (as->host == host)
 290                         __delete_addr(as);
 291         }
 292         write_unlock_irqrestore(&addr_space_lock, flags);
 293
 294         /* Now update the config-rom to reflect anything removed by the
 295          * highlevel driver. */
 296         if (update_cr && host->update_config_rom) {
 297                 if (hpsb_update_config_rom_image(host) < 0) {
 298                         HPSB_ERR("Failed to generate Configuration ROM image for host "
 299                                  "%s-%d", hl->name, host->id);
 300                 }
 301         }
 302
 303         /* And finally, remove all the host info associated between these
 304          * two. */
 305         hpsb_destroy_hostinfo(hl, host);
 306 }
 307
 308 static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data)
 309 {
 310         struct hpsb_highlevel *hl = __data;
 311
 312         __unregister_host(hl, host, 1);
 313
 314         return 0;
 315 }
 316
 317 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
 318 {
 319         write_lock(&hl_irqs_lock);
 320         list_del(&hl->irq_list);
 321         write_unlock(&hl_irqs_lock);
 322
 323         down_write(&hl_drivers_sem);
 324         list_del(&hl->hl_list);
 325         up_write(&hl_drivers_sem);
 326
 327         nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
 328 }
 329
 330 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
 331                                          struct hpsb_host *host,
 332                                          struct hpsb_address_ops *ops,
 333                                          u64 size, u64 alignment,
 334                                          u64 start, u64 end)
 335 {
 336         struct hpsb_address_serve *as, *a1, *a2;
 337         struct list_head *entry;
 338         u64 retval = ~0ULL;
 339         unsigned long flags;
 340         u64 align_mask = ~(alignment - 1);
 341
 342         if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
 343             ((hweight32(alignment >> 32) +
 344               hweight32(alignment & 0xffffffff) != 1))) {
 345                 HPSB_ERR("%s called with invalid alignment: 0x%048llx",
 346                          __FUNCTION__, (unsigned long long)alignment);
 347                 return retval;
 348         }
 349
 350         if (start == ~0ULL && end == ~0ULL) {
 351                 start = CSR1212_ALL_SPACE_BASE + 0xffff00000000ULL;  /* ohci1394.c limit */
 352                 end = CSR1212_ALL_SPACE_END;
 353         }
 354
 355         if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) {
 356                 HPSB_ERR("%s called with invalid addresses (start = %012Lx    end = %012Lx)",
 357                          __FUNCTION__, (unsigned long long)start, (unsigned long long)end);
 358                 return retval;
 359         }
 360
 361         as = (struct hpsb_address_serve *)
 362                 kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
 363         if (as == NULL) {
 364                 return retval;
 365         }
 366
 367         INIT_LIST_HEAD(&as->host_list);
 368         INIT_LIST_HEAD(&as->hl_list);
 369         as->op = ops;
 370         as->host = host;
 371
 372         write_lock_irqsave(&addr_space_lock, flags);
 373
 374         list_for_each(entry, &host->addr_space) {
 375                 u64 a1sa, a1ea;
 376                 u64 a2sa, a2ea;
 377
 378                 a1 = list_entry(entry, struct hpsb_address_serve, host_list);
 379                 a2 = list_entry(entry->next, struct hpsb_address_serve, host_list);
 380
 381                 a1sa = a1->start & align_mask;
 382                 a1ea = (a1->end + alignment -1) & align_mask;
 383                 a2sa = a2->start & align_mask;
 384                 a2ea = (a2->end + alignment -1) & align_mask;
 385
 386                 if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) {
 387                         as->start = max(start, a1ea);
 388                         as->end = as->start + size;
 389                         list_add(&as->host_list, entry);
 390                         list_add_tail(&as->hl_list, &hl->addr_list);
 391                         retval = as->start;
 392                         break;
 393                 }
 394         }
 395
 396         write_unlock_irqrestore(&addr_space_lock, flags);
 397
 398         if (retval == ~0ULL) {
 399                 kfree(as);
 400         }
 401
 402         return retval;
 403 }
 404
 405 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 406                             struct hpsb_address_ops *ops, u64 start, u64 end)
 407 {
 408         struct hpsb_address_serve *as;
 409         struct list_head *lh;
 410         int retval = 0;
 411         unsigned long flags;
 412
 413         if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) {
 414                 HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
 415                 return 0;
 416         }
 417
 418         as = (struct hpsb_address_serve *)
 419                 kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL);
 420         if (as == NULL) {
 421                 return 0;
 422         }
 423
 424         INIT_LIST_HEAD(&as->host_list);
 425         INIT_LIST_HEAD(&as->hl_list);
 426         as->op = ops;
 427         as->start = start;
 428         as->end = end;
 429         as->host = host;
 430
 431         write_lock_irqsave(&addr_space_lock, flags);
 432
 433         list_for_each(lh, &host->addr_space) {
 434                 struct hpsb_address_serve *as_this =
 435                         list_entry(lh, struct hpsb_address_serve, host_list);
 436                 struct hpsb_address_serve *as_next =
 437                         list_entry(lh->next, struct hpsb_address_serve, host_list);
 438
 439                 if (as_this->end > as->start)
 440                         break;
 441
 442                 if (as_next->start >= as->end) {
 443                         list_add(&as->host_list, lh);
 444                         list_add_tail(&as->hl_list, &hl->addr_list);
 445                         retval = 1;
 446                         break;
 447                 }
 448         }
 449         write_unlock_irqrestore(&addr_space_lock, flags);
 450
 451         if (retval == 0)
 452                 kfree(as);
 453
 454         return retval;
 455 }
 456
 457 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
 458                               u64 start)
 459 {
 460         int retval = 0;
 461         struct hpsb_address_serve *as;
 462         struct list_head *lh, *next;
 463         unsigned long flags;
 464
 465         write_lock_irqsave(&addr_space_lock, flags);
 466
 467         list_for_each_safe (lh, next, &hl->addr_list) {
 468                 as = list_entry(lh, struct hpsb_address_serve, hl_list);
 469                 if (as->start == start && as->host == host) {
 470                         __delete_addr(as);
 471                         retval = 1;
 472                         break;
 473                 }
 474         }
 475
 476         write_unlock_irqrestore(&addr_space_lock, flags);
 477
 478         return retval;
 479 }
 480
 481 int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
 482                          unsigned int channel)
 483 {
 484         if (channel > 63) {
 485                 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
 486                 return -EINVAL;
 487         }
 488
 489         if (host->iso_listen_count[channel]++ == 0) {
 490                 return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
 491         }
 492
 493         return 0;
 494 }
 495
 496 void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
 497                            unsigned int channel)
 498 {
 499         if (channel > 63) {
 500                 HPSB_ERR("%s called with invalid channel", __FUNCTION__);
 501                 return;
 502         }
 503
 504         if (--host->iso_listen_count[channel] == 0) {
 505                 host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
 506         }
 507 }
 508
 509 static void init_hpsb_highlevel(struct hpsb_host *host)
 510 {
 511         INIT_LIST_HEAD(&dummy_zero_addr.host_list);
 512         INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
 513         INIT_LIST_HEAD(&dummy_max_addr.host_list);
 514         INIT_LIST_HEAD(&dummy_max_addr.hl_list);
 515
 516         dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
 517
 518         dummy_zero_addr.start = dummy_zero_addr.end = 0;
 519         dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
 520
 521         list_add_tail(&dummy_zero_addr.host_list, &host->addr_space);
 522         list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
 523 }
 524
 525 void highlevel_add_host(struct hpsb_host *host)
 526 {
 527         struct hpsb_highlevel *hl;
 528
 529         init_hpsb_highlevel(host);
 530
 531         down_read(&hl_drivers_sem);
 532         list_for_each_entry(hl, &hl_drivers, hl_list) {
 533                 if (hl->add_host)
 534                         hl->add_host(host);
 535         }
 536         up_read(&hl_drivers_sem);
 537         if (host->update_config_rom) {
 538                 if (hpsb_update_config_rom_image(host) < 0)
 539                         HPSB_ERR("Failed to generate Configuration ROM image for "
 540                                  "host %s-%d", hl->name, host->id);
 541         }
 542 }
 543
 544 void highlevel_remove_host(struct hpsb_host *host)
 545 {
 546         struct hpsb_highlevel *hl;
 547
 548         down_read(&hl_drivers_sem);
 549         list_for_each_entry(hl, &hl_drivers, hl_list)
 550                 __unregister_host(hl, host, 0);
 551         up_read(&hl_drivers_sem);
 552 }
 553
 554 void highlevel_host_reset(struct hpsb_host *host)
 555 {
 556         struct hpsb_highlevel *hl;
 557
 558         read_lock(&hl_irqs_lock);
 559         list_for_each_entry(hl, &hl_irqs, irq_list) {
 560                 if (hl->host_reset)
 561                         hl->host_reset(host);
 562         }
 563         read_unlock(&hl_irqs_lock);
 564 }
 565
 566 void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length)
 567 {
 568         struct hpsb_highlevel *hl;
 569         int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
 570
 571         read_lock(&hl_irqs_lock);
 572         list_for_each_entry(hl, &hl_irqs, irq_list) {
 573                 if (hl->iso_receive)
 574                         hl->iso_receive(host, channel, data, length);
 575         }
 576         read_unlock(&hl_irqs_lock);
 577 }
 578
 579 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
 580                            void *data, size_t length)
 581 {
 582         struct hpsb_highlevel *hl;
 583         int cts = ((quadlet_t *)data)[0] >> 4;
 584
 585         read_lock(&hl_irqs_lock);
 586         list_for_each_entry(hl, &hl_irqs, irq_list) {
 587                 if (hl->fcp_request)
 588                         hl->fcp_request(host, nodeid, direction, cts, data,
 589                                         length);
 590         }
 591         read_unlock(&hl_irqs_lock);
 592 }
 593
 594 int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
 595                    u64 addr, unsigned int length, u16 flags)
 596 {
 597         struct hpsb_address_serve *as;
 598         unsigned int partlength;
 599         int rcode = RCODE_ADDRESS_ERROR;
 600
 601         read_lock(&addr_space_lock);
 602
 603         list_for_each_entry(as, &host->addr_space, host_list) {
 604                 if (as->start > addr)
 605                         break;
 606
 607                 if (as->end > addr) {
 608                         partlength = min(as->end - addr, (u64) length);
 609
 610                         if (as->op->read) {
 611                                 rcode = as->op->read(host, nodeid, data,
 612                                                      addr, partlength, flags);
 613                         } else {
 614                                 rcode = RCODE_TYPE_ERROR;
 615                         }
 616
 617                         data += partlength;
 618                         length -= partlength;
 619                         addr += partlength;
 620
 621                         if ((rcode != RCODE_COMPLETE) || !length) {
 622                                 break;
 623                         }
 624                 }
 625         }
 626
 627         read_unlock(&addr_space_lock);
 628
 629         if (length && (rcode == RCODE_COMPLETE)) {
 630                 rcode = RCODE_ADDRESS_ERROR;
 631         }
 632
 633         return rcode;
 634 }
 635
 636 int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
 637                     void *data, u64 addr, unsigned int length, u16 flags)
 638 {
 639         struct hpsb_address_serve *as;
 640         unsigned int partlength;
 641         int rcode = RCODE_ADDRESS_ERROR;
 642
 643         read_lock(&addr_space_lock);
 644
 645         list_for_each_entry(as, &host->addr_space, host_list) {
 646                 if (as->start > addr)
 647                         break;
 648
 649                 if (as->end > addr) {
 650                         partlength = min(as->end - addr, (u64) length);
 651
 652                         if (as->op->write) {
 653                                 rcode = as->op->write(host, nodeid, destid,
 654                                                       data, addr, partlength, flags);
 655                         } else {
 656                                 rcode = RCODE_TYPE_ERROR;
 657                         }
 658
 659                         data += partlength;
 660                         length -= partlength;
 661                         addr += partlength;
 662
 663                         if ((rcode != RCODE_COMPLETE) || !length) {
 664                                 break;
 665                         }
 666                 }
 667         }
 668
 669         read_unlock(&addr_space_lock);
 670
 671         if (length && (rcode == RCODE_COMPLETE)) {
 672                 rcode = RCODE_ADDRESS_ERROR;
 673         }
 674
 675         return rcode;
 676 }
 677
 678
 679 int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
 680                    u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags)
 681 {
 682         struct hpsb_address_serve *as;
 683         int rcode = RCODE_ADDRESS_ERROR;
 684
 685         read_lock(&addr_space_lock);
 686
 687         list_for_each_entry(as, &host->addr_space, host_list) {
 688                 if (as->start > addr)
 689                         break;
 690
 691                 if (as->end > addr) {
 692                         if (as->op->lock) {
 693                                 rcode = as->op->lock(host, nodeid, store, addr,
 694                                                      data, arg, ext_tcode, flags);
 695                         } else {
 696                                 rcode = RCODE_TYPE_ERROR;
 697                         }
 698
 699                         break;
 700                 }
 701         }
 702
 703         read_unlock(&addr_space_lock);
 704
 705         return rcode;
 706 }
 707
 708 int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
 709                      u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags)
 710 {
 711         struct hpsb_address_serve *as;
 712         int rcode = RCODE_ADDRESS_ERROR;
 713
 714         read_lock(&addr_space_lock);
 715
 716         list_for_each_entry(as, &host->addr_space, host_list) {
 717                 if (as->start > addr)
 718                         break;
 719
 720                 if (as->end > addr) {
 721                         if (as->op->lock64) {
 722                                 rcode = as->op->lock64(host, nodeid, store,
 723                                                        addr, data, arg,
 724                                                        ext_tcode, flags);
 725                         } else {
 726                                 rcode = RCODE_TYPE_ERROR;
 727                         }
 728
 729                         break;
 730                 }
 731         }
 732
 733         read_unlock(&addr_space_lock);
 734
 735         return rcode;
 736 }