git.oblomov.eu Git - linux-2.6/blob - drivers/ieee1394/nodemgr.c

   1 /*
   2  * Node information (ConfigROM) collection and management.
   3  *
   4  * Copyright (C) 2000           Andreas E. Bombe
   5  *               2001-2003      Ben Collins <bcollins@debian.net>
   6  *
   7  * This code is licensed under the GPL.  See the file COPYING in the root
   8  * directory of the kernel sources for details.
   9  */
  10
  11 #include <linux/bitmap.h>
  12 #include <linux/kernel.h>
  13 #include <linux/list.h>
  14 #include <linux/slab.h>
  15 #include <linux/delay.h>
  16 #include <linux/kthread.h>
  17 #include <linux/module.h>
  18 #include <linux/moduleparam.h>
  19 #include <linux/mutex.h>
  20 #include <linux/freezer.h>
  21 #include <linux/semaphore.h>
  22 #include <asm/atomic.h>
  23
  24 #include "csr.h"
  25 #include "highlevel.h"
  26 #include "hosts.h"
  27 #include "ieee1394.h"
  28 #include "ieee1394_core.h"
  29 #include "ieee1394_hotplug.h"
  30 #include "ieee1394_types.h"
  31 #include "ieee1394_transactions.h"
  32 #include "nodemgr.h"
  33
  34 static int ignore_drivers;
  35 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
  36 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
  37
  38 struct nodemgr_csr_info {
  39         struct hpsb_host *host;
  40         nodeid_t nodeid;
  41         unsigned int generation;
  42         unsigned int speed_unverified:1;
  43 };
  44
  45
  46 /*
  47  * Correct the speed map entry.  This is necessary
  48  *  - for nodes with link speed < phy speed,
  49  *  - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
  50  * A possible speed is determined by trial and error, using quadlet reads.
  51  */
  52 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
  53                                quadlet_t *buffer)
  54 {
  55         quadlet_t q;
  56         u8 i, *speed, old_speed, good_speed;
  57         int error;
  58
  59         speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
  60         old_speed = *speed;
  61         good_speed = IEEE1394_SPEED_MAX + 1;
  62
  63         /* Try every speed from S100 to old_speed.
  64          * If we did it the other way around, a too low speed could be caught
  65          * if the retry succeeded for some other reason, e.g. because the link
  66          * just finished its initialization. */
  67         for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
  68                 *speed = i;
  69                 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
  70                                   &q, 4);
  71                 if (error)
  72                         break;
  73                 *buffer = q;
  74                 good_speed = i;
  75         }
  76         if (good_speed <= IEEE1394_SPEED_MAX) {
  77                 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
  78                            NODE_BUS_ARGS(ci->host, ci->nodeid),
  79                            hpsb_speedto_str[good_speed]);
  80                 *speed = good_speed;
  81                 ci->speed_unverified = 0;
  82                 return 0;
  83         }
  84         *speed = old_speed;
  85         return error;
  86 }
  87
  88 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
  89                             void *buffer, void *__ci)
  90 {
  91         struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
  92         int i, error;
  93
  94         for (i = 1; ; i++) {
  95                 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
  96                                   buffer, 4);
  97                 if (!error) {
  98                         ci->speed_unverified = 0;
  99                         break;
 100                 }
 101                 /* Give up after 3rd failure. */
 102                 if (i == 3)
 103                         break;
 104
 105                 /* The ieee1394_core guessed the node's speed capability from
 106                  * the self ID.  Check whether a lower speed works. */
 107                 if (ci->speed_unverified) {
 108                         error = nodemgr_check_speed(ci, addr, buffer);
 109                         if (!error)
 110                                 break;
 111                 }
 112                 if (msleep_interruptible(334))
 113                         return -EINTR;
 114         }
 115         return error;
 116 }
 117
 118 static struct csr1212_bus_ops nodemgr_csr_ops = {
 119         .bus_read =     nodemgr_bus_read,
 120 };
 121
 122
 123 /*
 124  * Basically what we do here is start off retrieving the bus_info block.
 125  * From there will fill in some info about the node, verify it is of IEEE
 126  * 1394 type, and that the crc checks out ok. After that we start off with
 127  * the root directory, and subdirectories. To do this, we retrieve the
 128  * quadlet header for a directory, find out the length, and retrieve the
 129  * complete directory entry (be it a leaf or a directory). We then process
 130  * it and add the info to our structure for that particular node.
 131  *
 132  * We verify CRC's along the way for each directory/block/leaf. The entire
 133  * node structure is generic, and simply stores the information in a way
 134  * that's easy to parse by the protocol interface.
 135  */
 136
 137 /*
 138  * The nodemgr relies heavily on the Driver Model for device callbacks and
 139  * driver/device mappings. The old nodemgr used to handle all this itself,
 140  * but now we are much simpler because of the LDM.
 141  */
 142
 143 struct host_info {
 144         struct hpsb_host *host;
 145         struct list_head list;
 146         struct task_struct *thread;
 147 };
 148
 149 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
 150 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
 151
 152 struct bus_type ieee1394_bus_type = {
 153         .name           = "ieee1394",
 154         .match          = nodemgr_bus_match,
 155 };
 156
 157 static void host_cls_release(struct device *dev)
 158 {
 159         put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
 160 }
 161
 162 struct class hpsb_host_class = {
 163         .name           = "ieee1394_host",
 164         .dev_release    = host_cls_release,
 165 };
 166
 167 static void ne_cls_release(struct device *dev)
 168 {
 169         put_device(&container_of((dev), struct node_entry, node_dev)->device);
 170 }
 171
 172 static struct class nodemgr_ne_class = {
 173         .name           = "ieee1394_node",
 174         .dev_release    = ne_cls_release,
 175 };
 176
 177 static void ud_cls_release(struct device *dev)
 178 {
 179         put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
 180 }
 181
 182 /* The name here is only so that unit directory hotplug works with old
 183  * style hotplug, which only ever did unit directories anyway.
 184  */
 185 static struct class nodemgr_ud_class = {
 186         .name           = "ieee1394",
 187         .dev_release    = ud_cls_release,
 188         .dev_uevent     = nodemgr_uevent,
 189 };
 190
 191 static struct hpsb_highlevel nodemgr_highlevel;
 192
 193
 194 static void nodemgr_release_ud(struct device *dev)
 195 {
 196         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 197
 198         if (ud->vendor_name_kv)
 199                 csr1212_release_keyval(ud->vendor_name_kv);
 200         if (ud->model_name_kv)
 201                 csr1212_release_keyval(ud->model_name_kv);
 202
 203         kfree(ud);
 204 }
 205
 206 static void nodemgr_release_ne(struct device *dev)
 207 {
 208         struct node_entry *ne = container_of(dev, struct node_entry, device);
 209
 210         if (ne->vendor_name_kv)
 211                 csr1212_release_keyval(ne->vendor_name_kv);
 212
 213         kfree(ne);
 214 }
 215
 216
 217 static void nodemgr_release_host(struct device *dev)
 218 {
 219         struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
 220
 221         csr1212_destroy_csr(host->csr.rom);
 222
 223         kfree(host);
 224 }
 225
 226 static int nodemgr_ud_platform_data;
 227
 228 static struct device nodemgr_dev_template_ud = {
 229         .bus            = &ieee1394_bus_type,
 230         .release        = nodemgr_release_ud,
 231         .platform_data  = &nodemgr_ud_platform_data,
 232 };
 233
 234 static struct device nodemgr_dev_template_ne = {
 235         .bus            = &ieee1394_bus_type,
 236         .release        = nodemgr_release_ne,
 237 };
 238
 239 /* This dummy driver prevents the host devices from being scanned. We have no
 240  * useful drivers for them yet, and there would be a deadlock possible if the
 241  * driver core scans the host device while the host's low-level driver (i.e.
 242  * the host's parent device) is being removed. */
 243 static struct device_driver nodemgr_mid_layer_driver = {
 244         .bus            = &ieee1394_bus_type,
 245         .name           = "nodemgr",
 246         .owner          = THIS_MODULE,
 247 };
 248
 249 struct device nodemgr_dev_template_host = {
 250         .bus            = &ieee1394_bus_type,
 251         .release        = nodemgr_release_host,
 252 };
 253
 254
 255 #define fw_attr(class, class_type, field, type, format_string)          \
 256 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
 257 {                                                                       \
 258         class_type *class;                                              \
 259         class = container_of(dev, class_type, device);                  \
 260         return sprintf(buf, format_string, (type)class->field);         \
 261 }                                                                       \
 262 static struct device_attribute dev_attr_##class##_##field = {           \
 263         .attr = {.name = __stringify(field), .mode = S_IRUGO },         \
 264         .show   = fw_show_##class##_##field,                            \
 265 };
 266
 267 #define fw_attr_td(class, class_type, td_kv)                            \
 268 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
 269 {                                                                       \
 270         int len;                                                        \
 271         class_type *class = container_of(dev, class_type, device);      \
 272         len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);   \
 273         memcpy(buf,                                                     \
 274                CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),      \
 275                len);                                                    \
 276         while (buf[len - 1] == '\0')                                    \
 277                 len--;                                                  \
 278         buf[len++] = '\n';                                              \
 279         buf[len] = '\0';                                                \
 280         return len;                                                     \
 281 }                                                                       \
 282 static struct device_attribute dev_attr_##class##_##td_kv = {           \
 283         .attr = {.name = __stringify(td_kv), .mode = S_IRUGO },         \
 284         .show   = fw_show_##class##_##td_kv,                            \
 285 };
 286
 287
 288 #define fw_drv_attr(field, type, format_string)                 \
 289 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
 290 {                                                               \
 291         struct hpsb_protocol_driver *driver;                    \
 292         driver = container_of(drv, struct hpsb_protocol_driver, driver); \
 293         return sprintf(buf, format_string, (type)driver->field);\
 294 }                                                               \
 295 static struct driver_attribute driver_attr_drv_##field = {      \
 296         .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
 297         .show   = fw_drv_show_##field,                          \
 298 };
 299
 300
 301 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
 302 {
 303         struct node_entry *ne = container_of(dev, struct node_entry, device);
 304
 305         return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
 306                        "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
 307                        ne->busopt.irmc,
 308                        ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
 309                        ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
 310                        ne->busopt.max_rec,
 311                        ne->busopt.max_rom,
 312                        ne->busopt.cyc_clk_acc);
 313 }
 314 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
 315
 316
 317 #ifdef HPSB_DEBUG_TLABELS
 318 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
 319                                        struct device_attribute *attr, char *buf)
 320 {
 321         struct node_entry *ne = container_of(dev, struct node_entry, device);
 322         unsigned long flags;
 323         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 324         int tf;
 325
 326         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 327         tf = 64 - bitmap_weight(tp, 64);
 328         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 329
 330         return sprintf(buf, "%d\n", tf);
 331 }
 332 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
 333
 334
 335 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
 336                                        struct device_attribute *attr, char *buf)
 337 {
 338         struct node_entry *ne = container_of(dev, struct node_entry, device);
 339         unsigned long flags;
 340         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 341         u64 tm;
 342
 343         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 344 #if (BITS_PER_LONG <= 32)
 345         tm = ((u64)tp[0] << 32) + tp[1];
 346 #else
 347         tm = tp[0];
 348 #endif
 349         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 350
 351         return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
 352 }
 353 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
 354 #endif /* HPSB_DEBUG_TLABELS */
 355
 356
 357 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 358 {
 359         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 360         int state = simple_strtoul(buf, NULL, 10);
 361
 362         if (state == 1) {
 363                 ud->ignore_driver = 1;
 364                 device_release_driver(dev);
 365         } else if (state == 0)
 366                 ud->ignore_driver = 0;
 367
 368         return count;
 369 }
 370 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
 371 {
 372         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 373
 374         return sprintf(buf, "%d\n", ud->ignore_driver);
 375 }
 376 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
 377
 378
 379 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
 380                              size_t count)
 381 {
 382         int error = 0;
 383
 384         if (simple_strtoul(buf, NULL, 10) == 1)
 385                 error = bus_rescan_devices(&ieee1394_bus_type);
 386         return error ? error : count;
 387 }
 388 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
 389 {
 390         return sprintf(buf, "You can force a rescan of the bus for "
 391                         "drivers by writing a 1 to this file\n");
 392 }
 393 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
 394
 395
 396 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
 397 {
 398         int state = simple_strtoul(buf, NULL, 10);
 399
 400         if (state == 1)
 401                 ignore_drivers = 1;
 402         else if (state == 0)
 403                 ignore_drivers = 0;
 404
 405         return count;
 406 }
 407 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
 408 {
 409         return sprintf(buf, "%d\n", ignore_drivers);
 410 }
 411 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
 412
 413
 414 struct bus_attribute *const fw_bus_attrs[] = {
 415         &bus_attr_rescan,
 416         &bus_attr_ignore_drivers,
 417         NULL
 418 };
 419
 420
 421 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
 422 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
 423
 424 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
 425 fw_attr_td(ne, struct node_entry, vendor_name_kv)
 426
 427 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
 428 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
 429 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
 430
 431 static struct device_attribute *const fw_ne_attrs[] = {
 432         &dev_attr_ne_guid,
 433         &dev_attr_ne_guid_vendor_id,
 434         &dev_attr_ne_capabilities,
 435         &dev_attr_ne_vendor_id,
 436         &dev_attr_ne_nodeid,
 437         &dev_attr_bus_options,
 438 #ifdef HPSB_DEBUG_TLABELS
 439         &dev_attr_tlabels_free,
 440         &dev_attr_tlabels_mask,
 441 #endif
 442 };
 443
 444
 445
 446 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
 447 fw_attr(ud, struct unit_directory, length, int, "%d\n")
 448 /* These are all dependent on the value being provided */
 449 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
 450 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
 451 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
 452 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
 453 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
 454 fw_attr_td(ud, struct unit_directory, model_name_kv)
 455
 456 static struct device_attribute *const fw_ud_attrs[] = {
 457         &dev_attr_ud_address,
 458         &dev_attr_ud_length,
 459         &dev_attr_ignore_driver,
 460 };
 461
 462
 463 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
 464 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
 465 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
 466 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
 467 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
 468 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
 469 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
 470 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
 471
 472 static struct device_attribute *const fw_host_attrs[] = {
 473         &dev_attr_host_node_count,
 474         &dev_attr_host_selfid_count,
 475         &dev_attr_host_nodes_active,
 476         &dev_attr_host_in_bus_reset,
 477         &dev_attr_host_is_root,
 478         &dev_attr_host_is_cycmst,
 479         &dev_attr_host_is_irm,
 480         &dev_attr_host_is_busmgr,
 481 };
 482
 483
 484 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
 485 {
 486         struct hpsb_protocol_driver *driver;
 487         struct ieee1394_device_id *id;
 488         int length = 0;
 489         char *scratch = buf;
 490
 491         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 492         id = driver->id_table;
 493         if (!id)
 494                 return 0;
 495
 496         for (; id->match_flags != 0; id++) {
 497                 int need_coma = 0;
 498
 499                 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
 500                         length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
 501                         scratch = buf + length;
 502                         need_coma++;
 503                 }
 504
 505                 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
 506                         length += sprintf(scratch, "%smodel_id=0x%06x",
 507                                           need_coma++ ? "," : "",
 508                                           id->model_id);
 509                         scratch = buf + length;
 510                 }
 511
 512                 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
 513                         length += sprintf(scratch, "%sspecifier_id=0x%06x",
 514                                           need_coma++ ? "," : "",
 515                                           id->specifier_id);
 516                         scratch = buf + length;
 517                 }
 518
 519                 if (id->match_flags & IEEE1394_MATCH_VERSION) {
 520                         length += sprintf(scratch, "%sversion=0x%06x",
 521                                           need_coma++ ? "," : "",
 522                                           id->version);
 523                         scratch = buf + length;
 524                 }
 525
 526                 if (need_coma) {
 527                         *scratch++ = '\n';
 528                         length++;
 529                 }
 530         }
 531
 532         return length;
 533 }
 534 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
 535
 536
 537 fw_drv_attr(name, const char *, "%s\n")
 538
 539 static struct driver_attribute *const fw_drv_attrs[] = {
 540         &driver_attr_drv_name,
 541         &driver_attr_device_ids,
 542 };
 543
 544
 545 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
 546 {
 547         struct device_driver *drv = &driver->driver;
 548         int i;
 549
 550         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 551                 if (driver_create_file(drv, fw_drv_attrs[i]))
 552                         goto fail;
 553         return;
 554 fail:
 555         HPSB_ERR("Failed to add sysfs attribute");
 556 }
 557
 558
 559 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
 560 {
 561         struct device_driver *drv = &driver->driver;
 562         int i;
 563
 564         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 565                 driver_remove_file(drv, fw_drv_attrs[i]);
 566 }
 567
 568
 569 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
 570 {
 571         struct device *dev = &ne->device;
 572         int i;
 573
 574         for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
 575                 if (device_create_file(dev, fw_ne_attrs[i]))
 576                         goto fail;
 577         return;
 578 fail:
 579         HPSB_ERR("Failed to add sysfs attribute");
 580 }
 581
 582
 583 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
 584 {
 585         struct device *dev = &host->device;
 586         int i;
 587
 588         for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
 589                 if (device_create_file(dev, fw_host_attrs[i]))
 590                         goto fail;
 591         return;
 592 fail:
 593         HPSB_ERR("Failed to add sysfs attribute");
 594 }
 595
 596
 597 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
 598                                                nodeid_t nodeid);
 599
 600 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
 601 {
 602         struct device *dev = &host->device;
 603         struct node_entry *ne;
 604
 605         sysfs_remove_link(&dev->kobj, "irm_id");
 606         sysfs_remove_link(&dev->kobj, "busmgr_id");
 607         sysfs_remove_link(&dev->kobj, "host_id");
 608
 609         if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
 610             sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
 611                 goto fail;
 612         if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
 613             sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
 614                 goto fail;
 615         if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
 616             sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
 617                 goto fail;
 618         return;
 619 fail:
 620         HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
 621 }
 622
 623 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
 624 {
 625         struct device *dev = &ud->device;
 626         int i;
 627
 628         for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
 629                 if (device_create_file(dev, fw_ud_attrs[i]))
 630                         goto fail;
 631         if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
 632                 if (device_create_file(dev, &dev_attr_ud_specifier_id))
 633                         goto fail;
 634         if (ud->flags & UNIT_DIRECTORY_VERSION)
 635                 if (device_create_file(dev, &dev_attr_ud_version))
 636                         goto fail;
 637         if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
 638                 if (device_create_file(dev, &dev_attr_ud_vendor_id))
 639                         goto fail;
 640                 if (ud->vendor_name_kv &&
 641                     device_create_file(dev, &dev_attr_ud_vendor_name_kv))
 642                         goto fail;
 643         }
 644         if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
 645                 if (device_create_file(dev, &dev_attr_ud_model_id))
 646                         goto fail;
 647                 if (ud->model_name_kv &&
 648                     device_create_file(dev, &dev_attr_ud_model_name_kv))
 649                         goto fail;
 650         }
 651         return;
 652 fail:
 653         HPSB_ERR("Failed to add sysfs attribute");
 654 }
 655
 656
 657 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
 658 {
 659         struct hpsb_protocol_driver *driver;
 660         struct unit_directory *ud;
 661         struct ieee1394_device_id *id;
 662
 663         /* We only match unit directories */
 664         if (dev->platform_data != &nodemgr_ud_platform_data)
 665                 return 0;
 666
 667         ud = container_of(dev, struct unit_directory, device);
 668         if (ud->ne->in_limbo || ud->ignore_driver)
 669                 return 0;
 670
 671         /* We only match drivers of type hpsb_protocol_driver */
 672         if (drv == &nodemgr_mid_layer_driver)
 673                 return 0;
 674
 675         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 676         id = driver->id_table;
 677         if (!id)
 678                 return 0;
 679
 680         for (; id->match_flags != 0; id++) {
 681                 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
 682                     id->vendor_id != ud->vendor_id)
 683                         continue;
 684
 685                 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
 686                     id->model_id != ud->model_id)
 687                         continue;
 688
 689                 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
 690                     id->specifier_id != ud->specifier_id)
 691                         continue;
 692
 693                 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
 694                     id->version != ud->version)
 695                         continue;
 696
 697                 return 1;
 698         }
 699
 700         return 0;
 701 }
 702
 703
 704 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
 705
 706 static int match_ne(struct device *dev, void *data)
 707 {
 708         struct unit_directory *ud;
 709         struct node_entry *ne = data;
 710
 711         ud = container_of(dev, struct unit_directory, unit_dev);
 712         return ud->ne == ne;
 713 }
 714
 715 static void nodemgr_remove_uds(struct node_entry *ne)
 716 {
 717         struct device *dev;
 718         struct unit_directory *ud;
 719
 720         /* Use class_find device to iterate the devices. Since this code
 721          * may be called from other contexts besides the knodemgrds,
 722          * protect it by nodemgr_serialize_remove_uds.
 723          */
 724         mutex_lock(&nodemgr_serialize_remove_uds);
 725         for (;;) {
 726                 dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
 727                 if (!dev)
 728                         break;
 729                 ud = container_of(dev, struct unit_directory, unit_dev);
 730                 put_device(dev);
 731                 device_unregister(&ud->unit_dev);
 732                 device_unregister(&ud->device);
 733         }
 734         mutex_unlock(&nodemgr_serialize_remove_uds);
 735 }
 736
 737
 738 static void nodemgr_remove_ne(struct node_entry *ne)
 739 {
 740         struct device *dev;
 741
 742         dev = get_device(&ne->device);
 743         if (!dev)
 744                 return;
 745
 746         HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 747                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
 748         nodemgr_remove_uds(ne);
 749
 750         device_unregister(&ne->node_dev);
 751         device_unregister(dev);
 752
 753         put_device(dev);
 754 }
 755
 756 static int remove_host_dev(struct device *dev, void *data)
 757 {
 758         if (dev->bus == &ieee1394_bus_type)
 759                 nodemgr_remove_ne(container_of(dev, struct node_entry,
 760                                   device));
 761         return 0;
 762 }
 763
 764 static void nodemgr_remove_host_dev(struct device *dev)
 765 {
 766         device_for_each_child(dev, NULL, remove_host_dev);
 767         sysfs_remove_link(&dev->kobj, "irm_id");
 768         sysfs_remove_link(&dev->kobj, "busmgr_id");
 769         sysfs_remove_link(&dev->kobj, "host_id");
 770 }
 771
 772
 773 static void nodemgr_update_bus_options(struct node_entry *ne)
 774 {
 775 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
 776         static const u16 mr[] = { 4, 64, 1024, 0};
 777 #endif
 778         quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
 779
 780         ne->busopt.irmc         = (busoptions >> 31) & 1;
 781         ne->busopt.cmc          = (busoptions >> 30) & 1;
 782         ne->busopt.isc          = (busoptions >> 29) & 1;
 783         ne->busopt.bmc          = (busoptions >> 28) & 1;
 784         ne->busopt.pmc          = (busoptions >> 27) & 1;
 785         ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
 786         ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
 787         ne->busopt.max_rom      = (busoptions >> 8) & 0x3;
 788         ne->busopt.generation   = (busoptions >> 4) & 0xf;
 789         ne->busopt.lnkspd       = busoptions & 0x7;
 790
 791         HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
 792                      "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
 793                      busoptions, ne->busopt.irmc, ne->busopt.cmc,
 794                      ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
 795                      ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
 796                      mr[ne->busopt.max_rom],
 797                      ne->busopt.generation, ne->busopt.lnkspd);
 798 }
 799
 800
 801 static struct node_entry *nodemgr_create_node(octlet_t guid,
 802                                 struct csr1212_csr *csr, struct hpsb_host *host,
 803                                 nodeid_t nodeid, unsigned int generation)
 804 {
 805         struct node_entry *ne;
 806
 807         ne = kzalloc(sizeof(*ne), GFP_KERNEL);
 808         if (!ne)
 809                 goto fail_alloc;
 810
 811         ne->host = host;
 812         ne->nodeid = nodeid;
 813         ne->generation = generation;
 814         ne->needs_probe = true;
 815
 816         ne->guid = guid;
 817         ne->guid_vendor_id = (guid >> 40) & 0xffffff;
 818         ne->csr = csr;
 819
 820         memcpy(&ne->device, &nodemgr_dev_template_ne,
 821                sizeof(ne->device));
 822         ne->device.parent = &host->device;
 823         dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
 824
 825         ne->node_dev.parent = &ne->device;
 826         ne->node_dev.class = &nodemgr_ne_class;
 827         dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
 828
 829         if (device_register(&ne->device))
 830                 goto fail_devreg;
 831         if (device_register(&ne->node_dev))
 832                 goto fail_classdevreg;
 833         get_device(&ne->device);
 834
 835         nodemgr_create_ne_dev_files(ne);
 836
 837         nodemgr_update_bus_options(ne);
 838
 839         HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 840                    (host->node_id == nodeid) ? "Host" : "Node",
 841                    NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 842
 843         return ne;
 844
 845 fail_classdevreg:
 846         device_unregister(&ne->device);
 847 fail_devreg:
 848         kfree(ne);
 849 fail_alloc:
 850         HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 851                  NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 852
 853         return NULL;
 854 }
 855
 856 static int match_ne_guid(struct device *dev, void *data)
 857 {
 858         struct node_entry *ne;
 859         u64 *guid = data;
 860
 861         ne = container_of(dev, struct node_entry, node_dev);
 862         return ne->guid == *guid;
 863 }
 864
 865 static struct node_entry *find_entry_by_guid(u64 guid)
 866 {
 867         struct device *dev;
 868         struct node_entry *ne;
 869
 870         dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
 871         if (!dev)
 872                 return NULL;
 873         ne = container_of(dev, struct node_entry, node_dev);
 874         put_device(dev);
 875
 876         return ne;
 877 }
 878
 879 struct match_nodeid_parameter {
 880         struct hpsb_host *host;
 881         nodeid_t nodeid;
 882 };
 883
 884 static int match_ne_nodeid(struct device *dev, void *data)
 885 {
 886         int found = 0;
 887         struct node_entry *ne;
 888         struct match_nodeid_parameter *p = data;
 889
 890         if (!dev)
 891                 goto ret;
 892         ne = container_of(dev, struct node_entry, node_dev);
 893         if (ne->host == p->host && ne->nodeid == p->nodeid)
 894                 found = 1;
 895 ret:
 896         return found;
 897 }
 898
 899 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
 900                                                nodeid_t nodeid)
 901 {
 902         struct device *dev;
 903         struct node_entry *ne;
 904         struct match_nodeid_parameter p;
 905
 906         p.host = host;
 907         p.nodeid = nodeid;
 908
 909         dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
 910         if (!dev)
 911                 return NULL;
 912         ne = container_of(dev, struct node_entry, node_dev);
 913         put_device(dev);
 914
 915         return ne;
 916 }
 917
 918
 919 static void nodemgr_register_device(struct node_entry *ne,
 920         struct unit_directory *ud, struct device *parent)
 921 {
 922         memcpy(&ud->device, &nodemgr_dev_template_ud,
 923                sizeof(ud->device));
 924
 925         ud->device.parent = parent;
 926
 927         dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
 928
 929         ud->unit_dev.parent = &ud->device;
 930         ud->unit_dev.class = &nodemgr_ud_class;
 931         dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
 932
 933         if (device_register(&ud->device))
 934                 goto fail_devreg;
 935         if (device_register(&ud->unit_dev))
 936                 goto fail_classdevreg;
 937         get_device(&ud->device);
 938
 939         nodemgr_create_ud_dev_files(ud);
 940
 941         return;
 942
 943 fail_classdevreg:
 944         device_unregister(&ud->device);
 945 fail_devreg:
 946         HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
 947 }
 948
 949
 950 /* This implementation currently only scans the config rom and its
 951  * immediate unit directories looking for software_id and
 952  * software_version entries, in order to get driver autoloading working. */
 953 static struct unit_directory *nodemgr_process_unit_directory
 954         (struct node_entry *ne, struct csr1212_keyval *ud_kv,
 955          unsigned int *id, struct unit_directory *parent)
 956 {
 957         struct unit_directory *ud;
 958         struct unit_directory *ud_child = NULL;
 959         struct csr1212_dentry *dentry;
 960         struct csr1212_keyval *kv;
 961         u8 last_key_id = 0;
 962
 963         ud = kzalloc(sizeof(*ud), GFP_KERNEL);
 964         if (!ud)
 965                 goto unit_directory_error;
 966
 967         ud->ne = ne;
 968         ud->ignore_driver = ignore_drivers;
 969         ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
 970         ud->directory_id = ud->address & 0xffffff;
 971         ud->ud_kv = ud_kv;
 972         ud->id = (*id)++;
 973
 974         csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
 975                 switch (kv->key.id) {
 976                 case CSR1212_KV_ID_VENDOR:
 977                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
 978                                 ud->vendor_id = kv->value.immediate;
 979                                 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
 980                         }
 981                         break;
 982
 983                 case CSR1212_KV_ID_MODEL:
 984                         ud->model_id = kv->value.immediate;
 985                         ud->flags |= UNIT_DIRECTORY_MODEL_ID;
 986                         break;
 987
 988                 case CSR1212_KV_ID_SPECIFIER_ID:
 989                         ud->specifier_id = kv->value.immediate;
 990                         ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
 991                         break;
 992
 993                 case CSR1212_KV_ID_VERSION:
 994                         ud->version = kv->value.immediate;
 995                         ud->flags |= UNIT_DIRECTORY_VERSION;
 996                         break;
 997
 998                 case CSR1212_KV_ID_DESCRIPTOR:
 999                         if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1000                             CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1001                             CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1002                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1003                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1004                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1005                                 switch (last_key_id) {
1006                                 case CSR1212_KV_ID_VENDOR:
1007                                         csr1212_keep_keyval(kv);
1008                                         ud->vendor_name_kv = kv;
1009                                         break;
1010
1011                                 case CSR1212_KV_ID_MODEL:
1012                                         csr1212_keep_keyval(kv);
1013                                         ud->model_name_kv = kv;
1014                                         break;
1015
1016                                 }
1017                         } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1018                         break;
1019
1020                 case CSR1212_KV_ID_DEPENDENT_INFO:
1021                         /* Logical Unit Number */
1022                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1023                                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1024                                         ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1025                                         if (!ud_child)
1026                                                 goto unit_directory_error;
1027                                         nodemgr_register_device(ne, ud_child, &ne->device);
1028                                         ud_child = NULL;
1029
1030                                         ud->id = (*id)++;
1031                                 }
1032                                 ud->lun = kv->value.immediate;
1033                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1034
1035                         /* Logical Unit Directory */
1036                         } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1037                                 /* This should really be done in SBP2 as this is
1038                                  * doing SBP2 specific parsing.
1039                                  */
1040
1041                                 /* first register the parent unit */
1042                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1043                                 if (ud->device.bus != &ieee1394_bus_type)
1044                                         nodemgr_register_device(ne, ud, &ne->device);
1045
1046                                 /* process the child unit */
1047                                 ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
1048
1049                                 if (ud_child == NULL)
1050                                         break;
1051
1052                                 /* inherit unspecified values, the driver core picks it up */
1053                                 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1054                                     !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1055                                 {
1056                                         ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
1057                                         ud_child->model_id = ud->model_id;
1058                                 }
1059                                 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1060                                     !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1061                                 {
1062                                         ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
1063                                         ud_child->specifier_id = ud->specifier_id;
1064                                 }
1065                                 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1066                                     !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1067                                 {
1068                                         ud_child->flags |=  UNIT_DIRECTORY_VERSION;
1069                                         ud_child->version = ud->version;
1070                                 }
1071
1072                                 /* register the child unit */
1073                                 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1074                                 nodemgr_register_device(ne, ud_child, &ud->device);
1075                         }
1076
1077                         break;
1078
1079                 case CSR1212_KV_ID_DIRECTORY_ID:
1080                         ud->directory_id = kv->value.immediate;
1081                         break;
1082
1083                 default:
1084                         break;
1085                 }
1086                 last_key_id = kv->key.id;
1087         }
1088
1089         /* do not process child units here and only if not already registered */
1090         if (!parent && ud->device.bus != &ieee1394_bus_type)
1091                 nodemgr_register_device(ne, ud, &ne->device);
1092
1093         return ud;
1094
1095 unit_directory_error:
1096         kfree(ud);
1097         return NULL;
1098 }
1099
1100
1101 static void nodemgr_process_root_directory(struct node_entry *ne)
1102 {
1103         unsigned int ud_id = 0;
1104         struct csr1212_dentry *dentry;
1105         struct csr1212_keyval *kv, *vendor_name_kv = NULL;
1106         u8 last_key_id = 0;
1107
1108         ne->needs_probe = false;
1109
1110         csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1111                 switch (kv->key.id) {
1112                 case CSR1212_KV_ID_VENDOR:
1113                         ne->vendor_id = kv->value.immediate;
1114                         break;
1115
1116                 case CSR1212_KV_ID_NODE_CAPABILITIES:
1117                         ne->capabilities = kv->value.immediate;
1118                         break;
1119
1120                 case CSR1212_KV_ID_UNIT:
1121                         nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
1122                         break;
1123
1124                 case CSR1212_KV_ID_DESCRIPTOR:
1125                         if (last_key_id == CSR1212_KV_ID_VENDOR) {
1126                                 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1127                                     CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1128                                     CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1129                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1130                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1131                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1132                                         csr1212_keep_keyval(kv);
1133                                         vendor_name_kv = kv;
1134                                 }
1135                         }
1136                         break;
1137                 }
1138                 last_key_id = kv->key.id;
1139         }
1140
1141         if (ne->vendor_name_kv) {
1142                 kv = ne->vendor_name_kv;
1143                 ne->vendor_name_kv = vendor_name_kv;
1144                 csr1212_release_keyval(kv);
1145         } else if (vendor_name_kv) {
1146                 ne->vendor_name_kv = vendor_name_kv;
1147                 if (device_create_file(&ne->device,
1148                                        &dev_attr_ne_vendor_name_kv) != 0)
1149                         HPSB_ERR("Failed to add sysfs attribute");
1150         }
1151 }
1152
1153 #ifdef CONFIG_HOTPLUG
1154
1155 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1156 {
1157         struct unit_directory *ud;
1158         int retval = 0;
1159         /* ieee1394:venNmoNspNverN */
1160         char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1161
1162         if (!dev)
1163                 return -ENODEV;
1164
1165         ud = container_of(dev, struct unit_directory, unit_dev);
1166
1167         if (ud->ne->in_limbo || ud->ignore_driver)
1168                 return -ENODEV;
1169
1170 #define PUT_ENVP(fmt,val)                                       \
1171 do {                                                            \
1172         retval = add_uevent_var(env, fmt, val);         \
1173         if (retval)                                             \
1174                 return retval;                                  \
1175 } while (0)
1176
1177         PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1178         PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1179         PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1180         PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1181         PUT_ENVP("VERSION=%06x", ud->version);
1182         snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1183                         ud->vendor_id,
1184                         ud->model_id,
1185                         ud->specifier_id,
1186                         ud->version);
1187         PUT_ENVP("MODALIAS=%s", buf);
1188
1189 #undef PUT_ENVP
1190
1191         return 0;
1192 }
1193
1194 #else
1195
1196 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1197 {
1198         return -ENODEV;
1199 }
1200
1201 #endif /* CONFIG_HOTPLUG */
1202
1203
1204 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1205                              struct module *owner)
1206 {
1207         int error;
1208
1209         drv->driver.bus = &ieee1394_bus_type;
1210         drv->driver.owner = owner;
1211         drv->driver.name = drv->name;
1212
1213         /* This will cause a probe for devices */
1214         error = driver_register(&drv->driver);
1215         if (!error)
1216                 nodemgr_create_drv_files(drv);
1217         return error;
1218 }
1219
1220 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1221 {
1222         nodemgr_remove_drv_files(driver);
1223         /* This will subsequently disconnect all devices that our driver
1224          * is attached to. */
1225         driver_unregister(&driver->driver);
1226 }
1227
1228
1229 /*
1230  * This function updates nodes that were present on the bus before the
1231  * reset and still are after the reset.  The nodeid and the config rom
1232  * may have changed, and the drivers managing this device must be
1233  * informed that this device just went through a bus reset, to allow
1234  * the to take whatever actions required.
1235  */
1236 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1237                                 nodeid_t nodeid, unsigned int generation)
1238 {
1239         if (ne->nodeid != nodeid) {
1240                 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1241                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1242                            NODE_BUS_ARGS(ne->host, nodeid));
1243                 ne->nodeid = nodeid;
1244         }
1245
1246         if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1247                 kfree(ne->csr->private);
1248                 csr1212_destroy_csr(ne->csr);
1249                 ne->csr = csr;
1250
1251                 /* If the node's configrom generation has changed, we
1252                  * unregister all the unit directories. */
1253                 nodemgr_remove_uds(ne);
1254
1255                 nodemgr_update_bus_options(ne);
1256
1257                 /* Mark the node as new, so it gets re-probed */
1258                 ne->needs_probe = true;
1259         } else {
1260                 /* old cache is valid, so update its generation */
1261                 struct nodemgr_csr_info *ci = ne->csr->private;
1262                 ci->generation = generation;
1263                 /* free the partially filled now unneeded new cache */
1264                 kfree(csr->private);
1265                 csr1212_destroy_csr(csr);
1266         }
1267
1268         /* Mark the node current */
1269         ne->generation = generation;
1270
1271         if (ne->in_limbo) {
1272                 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1273                 ne->in_limbo = false;
1274
1275                 HPSB_DEBUG("Node reactivated: "
1276                            "ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1277                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1278                            (unsigned long long)ne->guid);
1279         }
1280 }
1281
1282 static void nodemgr_node_scan_one(struct hpsb_host *host,
1283                                   nodeid_t nodeid, int generation)
1284 {
1285         struct node_entry *ne;
1286         octlet_t guid;
1287         struct csr1212_csr *csr;
1288         struct nodemgr_csr_info *ci;
1289         u8 *speed;
1290
1291         ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1292         if (!ci)
1293                 return;
1294
1295         ci->host = host;
1296         ci->nodeid = nodeid;
1297         ci->generation = generation;
1298
1299         /* Prepare for speed probe which occurs when reading the ROM */
1300         speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1301         if (*speed > host->csr.lnk_spd)
1302                 *speed = host->csr.lnk_spd;
1303         ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1304
1305         /* We need to detect when the ConfigROM's generation has changed,
1306          * so we only update the node's info when it needs to be.  */
1307
1308         csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1309         if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1310                 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1311                          NODE_BUS_ARGS(host, nodeid));
1312                 if (csr)
1313                         csr1212_destroy_csr(csr);
1314                 kfree(ci);
1315                 return;
1316         }
1317
1318         if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1319                 /* This isn't a 1394 device, but we let it slide. There
1320                  * was a report of a device with broken firmware which
1321                  * reported '2394' instead of '1394', which is obviously a
1322                  * mistake. One would hope that a non-1394 device never
1323                  * gets connected to Firewire bus. If someone does, we
1324                  * shouldn't be held responsible, so we'll allow it with a
1325                  * warning.  */
1326                 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1327                           NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1328         }
1329
1330         guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1331         ne = find_entry_by_guid(guid);
1332
1333         if (ne && ne->host != host && ne->in_limbo) {
1334                 /* Must have moved this device from one host to another */
1335                 nodemgr_remove_ne(ne);
1336                 ne = NULL;
1337         }
1338
1339         if (!ne)
1340                 nodemgr_create_node(guid, csr, host, nodeid, generation);
1341         else
1342                 nodemgr_update_node(ne, csr, nodeid, generation);
1343 }
1344
1345
1346 static void nodemgr_node_scan(struct hpsb_host *host, int generation)
1347 {
1348         int count;
1349         struct selfid *sid = (struct selfid *)host->topology_map;
1350         nodeid_t nodeid = LOCAL_BUS;
1351
1352         /* Scan each node on the bus */
1353         for (count = host->selfid_count; count; count--, sid++) {
1354                 if (sid->extended)
1355                         continue;
1356
1357                 if (!sid->link_active) {
1358                         nodeid++;
1359                         continue;
1360                 }
1361                 nodemgr_node_scan_one(host, nodeid++, generation);
1362         }
1363 }
1364
1365 static void nodemgr_pause_ne(struct node_entry *ne)
1366 {
1367         HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1368                    NODE_BUS_ARGS(ne->host, ne->nodeid),
1369                    (unsigned long long)ne->guid);
1370
1371         ne->in_limbo = true;
1372         WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1373 }
1374
1375 static int update_pdrv(struct device *dev, void *data)
1376 {
1377         struct unit_directory *ud;
1378         struct device_driver *drv;
1379         struct hpsb_protocol_driver *pdrv;
1380         struct node_entry *ne = data;
1381         int error;
1382
1383         ud = container_of(dev, struct unit_directory, unit_dev);
1384         if (ud->ne == ne) {
1385                 drv = get_driver(ud->device.driver);
1386                 if (drv) {
1387                         error = 0;
1388                         pdrv = container_of(drv, struct hpsb_protocol_driver,
1389                                             driver);
1390                         if (pdrv->update) {
1391                                 down(&ud->device.sem);
1392                                 error = pdrv->update(ud);
1393                                 up(&ud->device.sem);
1394                         }
1395                         if (error)
1396                                 device_release_driver(&ud->device);
1397                         put_driver(drv);
1398                 }
1399         }
1400
1401         return 0;
1402 }
1403
1404 static void nodemgr_update_pdrv(struct node_entry *ne)
1405 {
1406         class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
1407 }
1408
1409 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3.  This
1410  * seems like an optional service but in the end it is practically mandatory
1411  * as a consequence of these clauses.
1412  *
1413  * Note that we cannot do a broadcast write to all nodes at once because some
1414  * pre-1394a devices would hang. */
1415 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1416 {
1417         const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1418         quadlet_t bc_remote, bc_local;
1419         int error;
1420
1421         if (!ne->host->is_irm || ne->generation != generation ||
1422             ne->nodeid == ne->host->node_id)
1423                 return;
1424
1425         bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1426
1427         /* Check if the register is implemented and 1394a compliant. */
1428         error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1429                           sizeof(bc_remote));
1430         if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1431             bc_remote != bc_local)
1432                 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1433 }
1434
1435
1436 static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
1437                              int generation)
1438 {
1439         struct device *dev;
1440
1441         if (ne->host != host || ne->in_limbo)
1442                 return;
1443
1444         dev = get_device(&ne->device);
1445         if (!dev)
1446                 return;
1447
1448         nodemgr_irm_write_bc(ne, generation);
1449
1450         /* If "needs_probe", then this is either a new or changed node we
1451          * rescan totally. If the generation matches for an existing node
1452          * (one that existed prior to the bus reset) we send update calls
1453          * down to the drivers. Otherwise, this is a dead node and we
1454          * suspend it. */
1455         if (ne->needs_probe)
1456                 nodemgr_process_root_directory(ne);
1457         else if (ne->generation == generation)
1458                 nodemgr_update_pdrv(ne);
1459         else
1460                 nodemgr_pause_ne(ne);
1461
1462         put_device(dev);
1463 }
1464
1465 struct node_probe_parameter {
1466         struct hpsb_host *host;
1467         int generation;
1468         bool probe_now;
1469 };
1470
1471 static int node_probe(struct device *dev, void *data)
1472 {
1473         struct node_probe_parameter *p = data;
1474         struct node_entry *ne;
1475
1476         if (p->generation != get_hpsb_generation(p->host))
1477                 return -EAGAIN;
1478
1479         ne = container_of(dev, struct node_entry, node_dev);
1480         if (ne->needs_probe == p->probe_now)
1481                 nodemgr_probe_ne(p->host, ne, p->generation);
1482         return 0;
1483 }
1484
1485 static int nodemgr_node_probe(struct hpsb_host *host, int generation)
1486 {
1487         struct node_probe_parameter p;
1488
1489         p.host = host;
1490         p.generation = generation;
1491         /*
1492          * Do some processing of the nodes we've probed. This pulls them
1493          * into the sysfs layer if needed, and can result in processing of
1494          * unit-directories, or just updating the node and it's
1495          * unit-directories.
1496          *
1497          * Run updates before probes. Usually, updates are time-critical
1498          * while probes are time-consuming.
1499          *
1500          * Meanwhile, another bus reset may have happened. In this case we
1501          * skip everything here and let the next bus scan handle it.
1502          * Otherwise we may prematurely remove nodes which are still there.
1503          */
1504         p.probe_now = false;
1505         if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1506                 return 0;
1507
1508         p.probe_now = true;
1509         if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1510                 return 0;
1511         /*
1512          * Now let's tell the bus to rescan our devices. This may seem
1513          * like overhead, but the driver-model core will only scan a
1514          * device for a driver when either the device is added, or when a
1515          * new driver is added. A bus reset is a good reason to rescan
1516          * devices that were there before.  For example, an sbp2 device
1517          * may become available for login, if the host that held it was
1518          * just removed.
1519          */
1520         if (bus_rescan_devices(&ieee1394_bus_type) != 0)
1521                 HPSB_DEBUG("bus_rescan_devices had an error");
1522
1523         return 1;
1524 }
1525
1526 static int remove_nodes_in_limbo(struct device *dev, void *data)
1527 {
1528         struct node_entry *ne;
1529
1530         if (dev->bus != &ieee1394_bus_type)
1531                 return 0;
1532
1533         ne = container_of(dev, struct node_entry, device);
1534         if (ne->in_limbo)
1535                 nodemgr_remove_ne(ne);
1536
1537         return 0;
1538 }
1539
1540 static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
1541 {
1542         device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
1543 }
1544
1545 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1546 {
1547         struct hpsb_packet *packet;
1548         int error = -ENOMEM;
1549
1550         packet = hpsb_make_phypacket(host,
1551                         EXTPHYPACKET_TYPE_RESUME |
1552                         NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1553         if (packet) {
1554                 packet->no_waiter = 1;
1555                 packet->generation = get_hpsb_generation(host);
1556                 error = hpsb_send_packet(packet);
1557         }
1558         if (error)
1559                 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1560                           host->id);
1561         return error;
1562 }
1563
1564 /* Perform a few high-level IRM responsibilities. */
1565 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1566 {
1567         quadlet_t bc;
1568
1569         /* if irm_id == -1 then there is no IRM on this bus */
1570         if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1571                 return 1;
1572
1573         /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1574         host->csr.broadcast_channel |= 0x40000000;
1575
1576         /* If there is no bus manager then we should set the root node's
1577          * force_root bit to promote bus stability per the 1394
1578          * spec. (8.4.2.6) */
1579         if (host->busmgr_id == 0xffff && host->node_count > 1)
1580         {
1581                 u16 root_node = host->node_count - 1;
1582
1583                 /* get cycle master capability flag from root node */
1584                 if (host->is_cycmst ||
1585                     (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1586                                 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1587                                 &bc, sizeof(quadlet_t)) &&
1588                      be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1589                         hpsb_send_phy_config(host, root_node, -1);
1590                 else {
1591                         HPSB_DEBUG("The root node is not cycle master capable; "
1592                                    "selecting a new root node and resetting...");
1593
1594                         if (cycles >= 5) {
1595                                 /* Oh screw it! Just leave the bus as it is */
1596                                 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1597                                 return 1;
1598                         }
1599
1600                         hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1601                         hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1602
1603                         return 0;
1604                 }
1605         }
1606
1607         /* Some devices suspend their ports while being connected to an inactive
1608          * host adapter, i.e. if connected before the low-level driver is
1609          * loaded.  They become visible either when physically unplugged and
1610          * replugged, or when receiving a resume packet.  Send one once. */
1611         if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1612                 host->resume_packet_sent = 1;
1613
1614         return 1;
1615 }
1616
1617 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1618  * everything we can do, otherwise issue a bus reset and try to become the IRM
1619  * ourselves. */
1620 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1621 {
1622         quadlet_t bc;
1623         int status;
1624
1625         if (hpsb_disable_irm || host->is_irm)
1626                 return 1;
1627
1628         status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1629                            get_hpsb_generation(host),
1630                            (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1631                            &bc, sizeof(quadlet_t));
1632
1633         if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1634                 /* The current irm node does not have a valid BROADCAST_CHANNEL
1635                  * register and we do, so reset the bus with force_root set */
1636                 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1637
1638                 if (cycles >= 5) {
1639                         /* Oh screw it! Just leave the bus as it is */
1640                         HPSB_DEBUG("Stopping reset loop for IRM sanity");
1641                         return 1;
1642                 }
1643
1644                 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1645                 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1646
1647                 return 0;
1648         }
1649
1650         return 1;
1651 }
1652
1653 static int nodemgr_host_thread(void *data)
1654 {
1655         struct hpsb_host *host = data;
1656         unsigned int g, generation = 0;
1657         int i, reset_cycles = 0;
1658
1659         set_freezable();
1660         /* Setup our device-model entries */
1661         nodemgr_create_host_dev_files(host);
1662
1663         for (;;) {
1664                 /* Sleep until next bus reset */
1665                 set_current_state(TASK_INTERRUPTIBLE);
1666                 if (get_hpsb_generation(host) == generation &&
1667                     !kthread_should_stop())
1668                         schedule();
1669                 __set_current_state(TASK_RUNNING);
1670
1671                 /* Thread may have been woken up to freeze or to exit */
1672                 if (try_to_freeze())
1673                         continue;
1674                 if (kthread_should_stop())
1675                         goto exit;
1676
1677                 /* Pause for 1/4 second in 1/16 second intervals,
1678                  * to make sure things settle down. */
1679                 g = get_hpsb_generation(host);
1680                 for (i = 0; i < 4 ; i++) {
1681                         msleep_interruptible(63);
1682                         try_to_freeze();
1683                         if (kthread_should_stop())
1684                                 goto exit;
1685
1686                         /* Now get the generation in which the node ID's we collect
1687                          * are valid.  During the bus scan we will use this generation
1688                          * for the read transactions, so that if another reset occurs
1689                          * during the scan the transactions will fail instead of
1690                          * returning bogus data. */
1691                         generation = get_hpsb_generation(host);
1692
1693                         /* If we get a reset before we are done waiting, then
1694                          * start the waiting over again */
1695                         if (generation != g)
1696                                 g = generation, i = 0;
1697                 }
1698
1699                 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1700                     !nodemgr_do_irm_duties(host, reset_cycles)) {
1701                         reset_cycles++;
1702                         continue;
1703                 }
1704                 reset_cycles = 0;
1705
1706                 /* Scan our nodes to get the bus options and create node
1707                  * entries. This does not do the sysfs stuff, since that
1708                  * would trigger uevents and such, which is a bad idea at
1709                  * this point. */
1710                 nodemgr_node_scan(host, generation);
1711
1712                 /* This actually does the full probe, with sysfs
1713                  * registration. */
1714                 if (!nodemgr_node_probe(host, generation))
1715                         continue;
1716
1717                 /* Update some of our sysfs symlinks */
1718                 nodemgr_update_host_dev_links(host);
1719
1720                 /* Sleep 3 seconds */
1721                 for (i = 3000/200; i; i--) {
1722                         msleep_interruptible(200);
1723                         try_to_freeze();
1724                         if (kthread_should_stop())
1725                                 goto exit;
1726
1727                         if (generation != get_hpsb_generation(host))
1728                                 break;
1729                 }
1730                 /* Remove nodes which are gone, unless a bus reset happened */
1731                 if (!i)
1732                         nodemgr_remove_nodes_in_limbo(host);
1733         }
1734 exit:
1735         HPSB_VERBOSE("NodeMgr: Exiting thread");
1736         return 0;
1737 }
1738
1739 struct per_host_parameter {
1740         void *data;
1741         int (*cb)(struct hpsb_host *, void *);
1742 };
1743
1744 static int per_host(struct device *dev, void *data)
1745 {
1746         struct hpsb_host *host;
1747         struct per_host_parameter *p = data;
1748
1749         host = container_of(dev, struct hpsb_host, host_dev);
1750         return p->cb(host, p->data);
1751 }
1752
1753 /**
1754  * nodemgr_for_each_host - call a function for each IEEE 1394 host
1755  * @data: an address to supply to the callback
1756  * @cb: function to call for each host
1757  *
1758  * Iterate the hosts, calling a given function with supplied data for each host.
1759  * If the callback fails on a host, i.e. if it returns a non-zero value, the
1760  * iteration is stopped.
1761  *
1762  * Return value: 0 on success, non-zero on failure (same as returned by last run
1763  * of the callback).
1764  */
1765 int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
1766 {
1767         struct per_host_parameter p;
1768
1769         p.cb = cb;
1770         p.data = data;
1771         return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
1772 }
1773
1774 /* The following two convenience functions use a struct node_entry
1775  * for addressing a node on the bus.  They are intended for use by any
1776  * process context, not just the nodemgr thread, so we need to be a
1777  * little careful when reading out the node ID and generation.  The
1778  * thing that can go wrong is that we get the node ID, then a bus
1779  * reset occurs, and then we read the generation.  The node ID is
1780  * possibly invalid, but the generation is current, and we end up
1781  * sending a packet to a the wrong node.
1782  *
1783  * The solution is to make sure we read the generation first, so that
1784  * if a reset occurs in the process, we end up with a stale generation
1785  * and the transactions will fail instead of silently using wrong node
1786  * ID's.
1787  */
1788
1789 /**
1790  * hpsb_node_fill_packet - fill some destination information into a packet
1791  * @ne: destination node
1792  * @packet: packet to fill in
1793  *
1794  * This will fill in the given, pre-initialised hpsb_packet with the current
1795  * information from the node entry (host, node ID, bus generation number).
1796  */
1797 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
1798 {
1799         packet->host = ne->host;
1800         packet->generation = ne->generation;
1801         barrier();
1802         packet->node_id = ne->nodeid;
1803 }
1804
1805 int hpsb_node_write(struct node_entry *ne, u64 addr,
1806                     quadlet_t *buffer, size_t length)
1807 {
1808         unsigned int generation = ne->generation;
1809
1810         barrier();
1811         return hpsb_write(ne->host, ne->nodeid, generation,
1812                           addr, buffer, length);
1813 }
1814
1815 static void nodemgr_add_host(struct hpsb_host *host)
1816 {
1817         struct host_info *hi;
1818
1819         hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1820         if (!hi) {
1821                 HPSB_ERR("NodeMgr: out of memory in add host");
1822                 return;
1823         }
1824         hi->host = host;
1825         hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
1826                                  host->id);
1827         if (IS_ERR(hi->thread)) {
1828                 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1829                 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1830         }
1831 }
1832
1833 static void nodemgr_host_reset(struct hpsb_host *host)
1834 {
1835         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1836
1837         if (hi) {
1838                 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1839                 wake_up_process(hi->thread);
1840         }
1841 }
1842
1843 static void nodemgr_remove_host(struct hpsb_host *host)
1844 {
1845         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1846
1847         if (hi) {
1848                 kthread_stop(hi->thread);
1849                 nodemgr_remove_host_dev(&host->device);
1850         }
1851 }
1852
1853 static struct hpsb_highlevel nodemgr_highlevel = {
1854         .name =         "Node manager",
1855         .add_host =     nodemgr_add_host,
1856         .host_reset =   nodemgr_host_reset,
1857         .remove_host =  nodemgr_remove_host,
1858 };
1859
1860 int init_ieee1394_nodemgr(void)
1861 {
1862         int error;
1863
1864         error = class_register(&nodemgr_ne_class);
1865         if (error)
1866                 goto fail_ne;
1867         error = class_register(&nodemgr_ud_class);
1868         if (error)
1869                 goto fail_ud;
1870         error = driver_register(&nodemgr_mid_layer_driver);
1871         if (error)
1872                 goto fail_ml;
1873         /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1874         nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1875
1876         hpsb_register_highlevel(&nodemgr_highlevel);
1877         return 0;
1878
1879 fail_ml:
1880         class_unregister(&nodemgr_ud_class);
1881 fail_ud:
1882         class_unregister(&nodemgr_ne_class);
1883 fail_ne:
1884         return error;
1885 }
1886
1887 void cleanup_ieee1394_nodemgr(void)
1888 {
1889         hpsb_unregister_highlevel(&nodemgr_highlevel);
1890         driver_unregister(&nodemgr_mid_layer_driver);
1891         class_unregister(&nodemgr_ud_class);
1892         class_unregister(&nodemgr_ne_class);
1893 }