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, sizeof(quadlet_t));
  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, u16 length,
  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, length);
  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 && length == sizeof(quadlet_t)) {
 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 #define OUI_FREECOM_TECHNOLOGIES_GMBH 0x0001db
 119
 120 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
 121 {
 122         /* Freecom FireWire Hard Drive firmware bug */
 123         if (be32_to_cpu(bus_info_data[3]) >> 8 == OUI_FREECOM_TECHNOLOGIES_GMBH)
 124                 return 0;
 125
 126         return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3;
 127 }
 128
 129 static struct csr1212_bus_ops nodemgr_csr_ops = {
 130         .bus_read =     nodemgr_bus_read,
 131         .get_max_rom =  nodemgr_get_max_rom
 132 };
 133
 134
 135 /*
 136  * Basically what we do here is start off retrieving the bus_info block.
 137  * From there will fill in some info about the node, verify it is of IEEE
 138  * 1394 type, and that the crc checks out ok. After that we start off with
 139  * the root directory, and subdirectories. To do this, we retrieve the
 140  * quadlet header for a directory, find out the length, and retrieve the
 141  * complete directory entry (be it a leaf or a directory). We then process
 142  * it and add the info to our structure for that particular node.
 143  *
 144  * We verify CRC's along the way for each directory/block/leaf. The entire
 145  * node structure is generic, and simply stores the information in a way
 146  * that's easy to parse by the protocol interface.
 147  */
 148
 149 /*
 150  * The nodemgr relies heavily on the Driver Model for device callbacks and
 151  * driver/device mappings. The old nodemgr used to handle all this itself,
 152  * but now we are much simpler because of the LDM.
 153  */
 154
 155 struct host_info {
 156         struct hpsb_host *host;
 157         struct list_head list;
 158         struct task_struct *thread;
 159 };
 160
 161 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
 162 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
 163
 164 struct bus_type ieee1394_bus_type = {
 165         .name           = "ieee1394",
 166         .match          = nodemgr_bus_match,
 167 };
 168
 169 static void host_cls_release(struct device *dev)
 170 {
 171         put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
 172 }
 173
 174 struct class hpsb_host_class = {
 175         .name           = "ieee1394_host",
 176         .dev_release    = host_cls_release,
 177 };
 178
 179 static void ne_cls_release(struct device *dev)
 180 {
 181         put_device(&container_of((dev), struct node_entry, node_dev)->device);
 182 }
 183
 184 static struct class nodemgr_ne_class = {
 185         .name           = "ieee1394_node",
 186         .dev_release    = ne_cls_release,
 187 };
 188
 189 static void ud_cls_release(struct device *dev)
 190 {
 191         put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
 192 }
 193
 194 /* The name here is only so that unit directory hotplug works with old
 195  * style hotplug, which only ever did unit directories anyway.
 196  */
 197 static struct class nodemgr_ud_class = {
 198         .name           = "ieee1394",
 199         .dev_release    = ud_cls_release,
 200         .dev_uevent     = nodemgr_uevent,
 201 };
 202
 203 static struct hpsb_highlevel nodemgr_highlevel;
 204
 205
 206 static void nodemgr_release_ud(struct device *dev)
 207 {
 208         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 209
 210         if (ud->vendor_name_kv)
 211                 csr1212_release_keyval(ud->vendor_name_kv);
 212         if (ud->model_name_kv)
 213                 csr1212_release_keyval(ud->model_name_kv);
 214
 215         kfree(ud);
 216 }
 217
 218 static void nodemgr_release_ne(struct device *dev)
 219 {
 220         struct node_entry *ne = container_of(dev, struct node_entry, device);
 221
 222         if (ne->vendor_name_kv)
 223                 csr1212_release_keyval(ne->vendor_name_kv);
 224
 225         kfree(ne);
 226 }
 227
 228
 229 static void nodemgr_release_host(struct device *dev)
 230 {
 231         struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
 232
 233         csr1212_destroy_csr(host->csr.rom);
 234
 235         kfree(host);
 236 }
 237
 238 static int nodemgr_ud_platform_data;
 239
 240 static struct device nodemgr_dev_template_ud = {
 241         .bus            = &ieee1394_bus_type,
 242         .release        = nodemgr_release_ud,
 243         .platform_data  = &nodemgr_ud_platform_data,
 244 };
 245
 246 static struct device nodemgr_dev_template_ne = {
 247         .bus            = &ieee1394_bus_type,
 248         .release        = nodemgr_release_ne,
 249 };
 250
 251 /* This dummy driver prevents the host devices from being scanned. We have no
 252  * useful drivers for them yet, and there would be a deadlock possible if the
 253  * driver core scans the host device while the host's low-level driver (i.e.
 254  * the host's parent device) is being removed. */
 255 static struct device_driver nodemgr_mid_layer_driver = {
 256         .bus            = &ieee1394_bus_type,
 257         .name           = "nodemgr",
 258         .owner          = THIS_MODULE,
 259 };
 260
 261 struct device nodemgr_dev_template_host = {
 262         .bus            = &ieee1394_bus_type,
 263         .release        = nodemgr_release_host,
 264 };
 265
 266
 267 #define fw_attr(class, class_type, field, type, format_string)          \
 268 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
 269 {                                                                       \
 270         class_type *class;                                              \
 271         class = container_of(dev, class_type, device);                  \
 272         return sprintf(buf, format_string, (type)class->field);         \
 273 }                                                                       \
 274 static struct device_attribute dev_attr_##class##_##field = {           \
 275         .attr = {.name = __stringify(field), .mode = S_IRUGO },         \
 276         .show   = fw_show_##class##_##field,                            \
 277 };
 278
 279 #define fw_attr_td(class, class_type, td_kv)                            \
 280 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
 281 {                                                                       \
 282         int len;                                                        \
 283         class_type *class = container_of(dev, class_type, device);      \
 284         len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);   \
 285         memcpy(buf,                                                     \
 286                CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),      \
 287                len);                                                    \
 288         while (buf[len - 1] == '\0')                                    \
 289                 len--;                                                  \
 290         buf[len++] = '\n';                                              \
 291         buf[len] = '\0';                                                \
 292         return len;                                                     \
 293 }                                                                       \
 294 static struct device_attribute dev_attr_##class##_##td_kv = {           \
 295         .attr = {.name = __stringify(td_kv), .mode = S_IRUGO },         \
 296         .show   = fw_show_##class##_##td_kv,                            \
 297 };
 298
 299
 300 #define fw_drv_attr(field, type, format_string)                 \
 301 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
 302 {                                                               \
 303         struct hpsb_protocol_driver *driver;                    \
 304         driver = container_of(drv, struct hpsb_protocol_driver, driver); \
 305         return sprintf(buf, format_string, (type)driver->field);\
 306 }                                                               \
 307 static struct driver_attribute driver_attr_drv_##field = {      \
 308         .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
 309         .show   = fw_drv_show_##field,                          \
 310 };
 311
 312
 313 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
 314 {
 315         struct node_entry *ne = container_of(dev, struct node_entry, device);
 316
 317         return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
 318                        "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
 319                        ne->busopt.irmc,
 320                        ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
 321                        ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
 322                        ne->busopt.max_rec,
 323                        ne->busopt.max_rom,
 324                        ne->busopt.cyc_clk_acc);
 325 }
 326 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
 327
 328
 329 #ifdef HPSB_DEBUG_TLABELS
 330 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
 331                                        struct device_attribute *attr, char *buf)
 332 {
 333         struct node_entry *ne = container_of(dev, struct node_entry, device);
 334         unsigned long flags;
 335         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 336         int tf;
 337
 338         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 339         tf = 64 - bitmap_weight(tp, 64);
 340         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 341
 342         return sprintf(buf, "%d\n", tf);
 343 }
 344 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
 345
 346
 347 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
 348                                        struct device_attribute *attr, char *buf)
 349 {
 350         struct node_entry *ne = container_of(dev, struct node_entry, device);
 351         unsigned long flags;
 352         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 353         u64 tm;
 354
 355         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 356 #if (BITS_PER_LONG <= 32)
 357         tm = ((u64)tp[0] << 32) + tp[1];
 358 #else
 359         tm = tp[0];
 360 #endif
 361         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 362
 363         return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
 364 }
 365 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
 366 #endif /* HPSB_DEBUG_TLABELS */
 367
 368
 369 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 370 {
 371         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 372         int state = simple_strtoul(buf, NULL, 10);
 373
 374         if (state == 1) {
 375                 ud->ignore_driver = 1;
 376                 device_release_driver(dev);
 377         } else if (state == 0)
 378                 ud->ignore_driver = 0;
 379
 380         return count;
 381 }
 382 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
 383 {
 384         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 385
 386         return sprintf(buf, "%d\n", ud->ignore_driver);
 387 }
 388 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
 389
 390
 391 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
 392                              size_t count)
 393 {
 394         int error = 0;
 395
 396         if (simple_strtoul(buf, NULL, 10) == 1)
 397                 error = bus_rescan_devices(&ieee1394_bus_type);
 398         return error ? error : count;
 399 }
 400 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
 401 {
 402         return sprintf(buf, "You can force a rescan of the bus for "
 403                         "drivers by writing a 1 to this file\n");
 404 }
 405 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
 406
 407
 408 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
 409 {
 410         int state = simple_strtoul(buf, NULL, 10);
 411
 412         if (state == 1)
 413                 ignore_drivers = 1;
 414         else if (state == 0)
 415                 ignore_drivers = 0;
 416
 417         return count;
 418 }
 419 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
 420 {
 421         return sprintf(buf, "%d\n", ignore_drivers);
 422 }
 423 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
 424
 425
 426 struct bus_attribute *const fw_bus_attrs[] = {
 427         &bus_attr_rescan,
 428         &bus_attr_ignore_drivers,
 429         NULL
 430 };
 431
 432
 433 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
 434 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
 435
 436 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
 437 fw_attr_td(ne, struct node_entry, vendor_name_kv)
 438
 439 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
 440 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
 441 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
 442
 443 static struct device_attribute *const fw_ne_attrs[] = {
 444         &dev_attr_ne_guid,
 445         &dev_attr_ne_guid_vendor_id,
 446         &dev_attr_ne_capabilities,
 447         &dev_attr_ne_vendor_id,
 448         &dev_attr_ne_nodeid,
 449         &dev_attr_bus_options,
 450 #ifdef HPSB_DEBUG_TLABELS
 451         &dev_attr_tlabels_free,
 452         &dev_attr_tlabels_mask,
 453 #endif
 454 };
 455
 456
 457
 458 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
 459 fw_attr(ud, struct unit_directory, length, int, "%d\n")
 460 /* These are all dependent on the value being provided */
 461 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
 462 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
 463 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
 464 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
 465 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
 466 fw_attr_td(ud, struct unit_directory, model_name_kv)
 467
 468 static struct device_attribute *const fw_ud_attrs[] = {
 469         &dev_attr_ud_address,
 470         &dev_attr_ud_length,
 471         &dev_attr_ignore_driver,
 472 };
 473
 474
 475 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
 476 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
 477 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
 478 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
 479 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
 480 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
 481 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
 482 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
 483
 484 static struct device_attribute *const fw_host_attrs[] = {
 485         &dev_attr_host_node_count,
 486         &dev_attr_host_selfid_count,
 487         &dev_attr_host_nodes_active,
 488         &dev_attr_host_in_bus_reset,
 489         &dev_attr_host_is_root,
 490         &dev_attr_host_is_cycmst,
 491         &dev_attr_host_is_irm,
 492         &dev_attr_host_is_busmgr,
 493 };
 494
 495
 496 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
 497 {
 498         struct hpsb_protocol_driver *driver;
 499         struct ieee1394_device_id *id;
 500         int length = 0;
 501         char *scratch = buf;
 502
 503         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 504         id = driver->id_table;
 505         if (!id)
 506                 return 0;
 507
 508         for (; id->match_flags != 0; id++) {
 509                 int need_coma = 0;
 510
 511                 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
 512                         length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
 513                         scratch = buf + length;
 514                         need_coma++;
 515                 }
 516
 517                 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
 518                         length += sprintf(scratch, "%smodel_id=0x%06x",
 519                                           need_coma++ ? "," : "",
 520                                           id->model_id);
 521                         scratch = buf + length;
 522                 }
 523
 524                 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
 525                         length += sprintf(scratch, "%sspecifier_id=0x%06x",
 526                                           need_coma++ ? "," : "",
 527                                           id->specifier_id);
 528                         scratch = buf + length;
 529                 }
 530
 531                 if (id->match_flags & IEEE1394_MATCH_VERSION) {
 532                         length += sprintf(scratch, "%sversion=0x%06x",
 533                                           need_coma++ ? "," : "",
 534                                           id->version);
 535                         scratch = buf + length;
 536                 }
 537
 538                 if (need_coma) {
 539                         *scratch++ = '\n';
 540                         length++;
 541                 }
 542         }
 543
 544         return length;
 545 }
 546 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
 547
 548
 549 fw_drv_attr(name, const char *, "%s\n")
 550
 551 static struct driver_attribute *const fw_drv_attrs[] = {
 552         &driver_attr_drv_name,
 553         &driver_attr_device_ids,
 554 };
 555
 556
 557 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
 558 {
 559         struct device_driver *drv = &driver->driver;
 560         int i;
 561
 562         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 563                 if (driver_create_file(drv, fw_drv_attrs[i]))
 564                         goto fail;
 565         return;
 566 fail:
 567         HPSB_ERR("Failed to add sysfs attribute");
 568 }
 569
 570
 571 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
 572 {
 573         struct device_driver *drv = &driver->driver;
 574         int i;
 575
 576         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 577                 driver_remove_file(drv, fw_drv_attrs[i]);
 578 }
 579
 580
 581 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
 582 {
 583         struct device *dev = &ne->device;
 584         int i;
 585
 586         for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
 587                 if (device_create_file(dev, fw_ne_attrs[i]))
 588                         goto fail;
 589         return;
 590 fail:
 591         HPSB_ERR("Failed to add sysfs attribute");
 592 }
 593
 594
 595 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
 596 {
 597         struct device *dev = &host->device;
 598         int i;
 599
 600         for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
 601                 if (device_create_file(dev, fw_host_attrs[i]))
 602                         goto fail;
 603         return;
 604 fail:
 605         HPSB_ERR("Failed to add sysfs attribute");
 606 }
 607
 608
 609 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
 610                                                nodeid_t nodeid);
 611
 612 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
 613 {
 614         struct device *dev = &host->device;
 615         struct node_entry *ne;
 616
 617         sysfs_remove_link(&dev->kobj, "irm_id");
 618         sysfs_remove_link(&dev->kobj, "busmgr_id");
 619         sysfs_remove_link(&dev->kobj, "host_id");
 620
 621         if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
 622             sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
 623                 goto fail;
 624         if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
 625             sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
 626                 goto fail;
 627         if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
 628             sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
 629                 goto fail;
 630         return;
 631 fail:
 632         HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
 633 }
 634
 635 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
 636 {
 637         struct device *dev = &ud->device;
 638         int i;
 639
 640         for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
 641                 if (device_create_file(dev, fw_ud_attrs[i]))
 642                         goto fail;
 643         if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
 644                 if (device_create_file(dev, &dev_attr_ud_specifier_id))
 645                         goto fail;
 646         if (ud->flags & UNIT_DIRECTORY_VERSION)
 647                 if (device_create_file(dev, &dev_attr_ud_version))
 648                         goto fail;
 649         if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
 650                 if (device_create_file(dev, &dev_attr_ud_vendor_id))
 651                         goto fail;
 652                 if (ud->vendor_name_kv &&
 653                     device_create_file(dev, &dev_attr_ud_vendor_name_kv))
 654                         goto fail;
 655         }
 656         if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
 657                 if (device_create_file(dev, &dev_attr_ud_model_id))
 658                         goto fail;
 659                 if (ud->model_name_kv &&
 660                     device_create_file(dev, &dev_attr_ud_model_name_kv))
 661                         goto fail;
 662         }
 663         return;
 664 fail:
 665         HPSB_ERR("Failed to add sysfs attribute");
 666 }
 667
 668
 669 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
 670 {
 671         struct hpsb_protocol_driver *driver;
 672         struct unit_directory *ud;
 673         struct ieee1394_device_id *id;
 674
 675         /* We only match unit directories */
 676         if (dev->platform_data != &nodemgr_ud_platform_data)
 677                 return 0;
 678
 679         ud = container_of(dev, struct unit_directory, device);
 680         if (ud->ne->in_limbo || ud->ignore_driver)
 681                 return 0;
 682
 683         /* We only match drivers of type hpsb_protocol_driver */
 684         if (drv == &nodemgr_mid_layer_driver)
 685                 return 0;
 686
 687         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 688         id = driver->id_table;
 689         if (!id)
 690                 return 0;
 691
 692         for (; id->match_flags != 0; id++) {
 693                 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
 694                     id->vendor_id != ud->vendor_id)
 695                         continue;
 696
 697                 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
 698                     id->model_id != ud->model_id)
 699                         continue;
 700
 701                 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
 702                     id->specifier_id != ud->specifier_id)
 703                         continue;
 704
 705                 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
 706                     id->version != ud->version)
 707                         continue;
 708
 709                 return 1;
 710         }
 711
 712         return 0;
 713 }
 714
 715
 716 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
 717
 718 static int match_ne(struct device *dev, void *data)
 719 {
 720         struct unit_directory *ud;
 721         struct node_entry *ne = data;
 722
 723         ud = container_of(dev, struct unit_directory, unit_dev);
 724         return ud->ne == ne;
 725 }
 726
 727 static void nodemgr_remove_uds(struct node_entry *ne)
 728 {
 729         struct device *dev;
 730         struct unit_directory *ud;
 731
 732         /* Use class_find device to iterate the devices. Since this code
 733          * may be called from other contexts besides the knodemgrds,
 734          * protect it by nodemgr_serialize_remove_uds.
 735          */
 736         mutex_lock(&nodemgr_serialize_remove_uds);
 737         for (;;) {
 738                 dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
 739                 if (!dev)
 740                         break;
 741                 ud = container_of(dev, struct unit_directory, unit_dev);
 742                 put_device(dev);
 743                 device_unregister(&ud->unit_dev);
 744                 device_unregister(&ud->device);
 745         }
 746         mutex_unlock(&nodemgr_serialize_remove_uds);
 747 }
 748
 749
 750 static void nodemgr_remove_ne(struct node_entry *ne)
 751 {
 752         struct device *dev;
 753
 754         dev = get_device(&ne->device);
 755         if (!dev)
 756                 return;
 757
 758         HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 759                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
 760         nodemgr_remove_uds(ne);
 761
 762         device_unregister(&ne->node_dev);
 763         device_unregister(dev);
 764
 765         put_device(dev);
 766 }
 767
 768 static int remove_host_dev(struct device *dev, void *data)
 769 {
 770         if (dev->bus == &ieee1394_bus_type)
 771                 nodemgr_remove_ne(container_of(dev, struct node_entry,
 772                                   device));
 773         return 0;
 774 }
 775
 776 static void nodemgr_remove_host_dev(struct device *dev)
 777 {
 778         device_for_each_child(dev, NULL, remove_host_dev);
 779         sysfs_remove_link(&dev->kobj, "irm_id");
 780         sysfs_remove_link(&dev->kobj, "busmgr_id");
 781         sysfs_remove_link(&dev->kobj, "host_id");
 782 }
 783
 784
 785 static void nodemgr_update_bus_options(struct node_entry *ne)
 786 {
 787 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
 788         static const u16 mr[] = { 4, 64, 1024, 0};
 789 #endif
 790         quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
 791
 792         ne->busopt.irmc         = (busoptions >> 31) & 1;
 793         ne->busopt.cmc          = (busoptions >> 30) & 1;
 794         ne->busopt.isc          = (busoptions >> 29) & 1;
 795         ne->busopt.bmc          = (busoptions >> 28) & 1;
 796         ne->busopt.pmc          = (busoptions >> 27) & 1;
 797         ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
 798         ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
 799         ne->busopt.max_rom      = (busoptions >> 8) & 0x3;
 800         ne->busopt.generation   = (busoptions >> 4) & 0xf;
 801         ne->busopt.lnkspd       = busoptions & 0x7;
 802
 803         HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
 804                      "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
 805                      busoptions, ne->busopt.irmc, ne->busopt.cmc,
 806                      ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
 807                      ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
 808                      mr[ne->busopt.max_rom],
 809                      ne->busopt.generation, ne->busopt.lnkspd);
 810 }
 811
 812
 813 static struct node_entry *nodemgr_create_node(octlet_t guid,
 814                                 struct csr1212_csr *csr, struct hpsb_host *host,
 815                                 nodeid_t nodeid, unsigned int generation)
 816 {
 817         struct node_entry *ne;
 818
 819         ne = kzalloc(sizeof(*ne), GFP_KERNEL);
 820         if (!ne)
 821                 goto fail_alloc;
 822
 823         ne->host = host;
 824         ne->nodeid = nodeid;
 825         ne->generation = generation;
 826         ne->needs_probe = true;
 827
 828         ne->guid = guid;
 829         ne->guid_vendor_id = (guid >> 40) & 0xffffff;
 830         ne->csr = csr;
 831
 832         memcpy(&ne->device, &nodemgr_dev_template_ne,
 833                sizeof(ne->device));
 834         ne->device.parent = &host->device;
 835         dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
 836
 837         ne->node_dev.parent = &ne->device;
 838         ne->node_dev.class = &nodemgr_ne_class;
 839         dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
 840
 841         if (device_register(&ne->device))
 842                 goto fail_devreg;
 843         if (device_register(&ne->node_dev))
 844                 goto fail_classdevreg;
 845         get_device(&ne->device);
 846
 847         nodemgr_create_ne_dev_files(ne);
 848
 849         nodemgr_update_bus_options(ne);
 850
 851         HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 852                    (host->node_id == nodeid) ? "Host" : "Node",
 853                    NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 854
 855         return ne;
 856
 857 fail_classdevreg:
 858         device_unregister(&ne->device);
 859 fail_devreg:
 860         kfree(ne);
 861 fail_alloc:
 862         HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 863                  NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 864
 865         return NULL;
 866 }
 867
 868 static int match_ne_guid(struct device *dev, void *data)
 869 {
 870         struct node_entry *ne;
 871         u64 *guid = data;
 872
 873         ne = container_of(dev, struct node_entry, node_dev);
 874         return ne->guid == *guid;
 875 }
 876
 877 static struct node_entry *find_entry_by_guid(u64 guid)
 878 {
 879         struct device *dev;
 880         struct node_entry *ne;
 881
 882         dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
 883         if (!dev)
 884                 return NULL;
 885         ne = container_of(dev, struct node_entry, node_dev);
 886         put_device(dev);
 887
 888         return ne;
 889 }
 890
 891 struct match_nodeid_parameter {
 892         struct hpsb_host *host;
 893         nodeid_t nodeid;
 894 };
 895
 896 static int match_ne_nodeid(struct device *dev, void *data)
 897 {
 898         int found = 0;
 899         struct node_entry *ne;
 900         struct match_nodeid_parameter *p = data;
 901
 902         if (!dev)
 903                 goto ret;
 904         ne = container_of(dev, struct node_entry, node_dev);
 905         if (ne->host == p->host && ne->nodeid == p->nodeid)
 906                 found = 1;
 907 ret:
 908         return found;
 909 }
 910
 911 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
 912                                                nodeid_t nodeid)
 913 {
 914         struct device *dev;
 915         struct node_entry *ne;
 916         struct match_nodeid_parameter p;
 917
 918         p.host = host;
 919         p.nodeid = nodeid;
 920
 921         dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
 922         if (!dev)
 923                 return NULL;
 924         ne = container_of(dev, struct node_entry, node_dev);
 925         put_device(dev);
 926
 927         return ne;
 928 }
 929
 930
 931 static void nodemgr_register_device(struct node_entry *ne,
 932         struct unit_directory *ud, struct device *parent)
 933 {
 934         memcpy(&ud->device, &nodemgr_dev_template_ud,
 935                sizeof(ud->device));
 936
 937         ud->device.parent = parent;
 938
 939         dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
 940
 941         ud->unit_dev.parent = &ud->device;
 942         ud->unit_dev.class = &nodemgr_ud_class;
 943         dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
 944
 945         if (device_register(&ud->device))
 946                 goto fail_devreg;
 947         if (device_register(&ud->unit_dev))
 948                 goto fail_classdevreg;
 949         get_device(&ud->device);
 950
 951         nodemgr_create_ud_dev_files(ud);
 952
 953         return;
 954
 955 fail_classdevreg:
 956         device_unregister(&ud->device);
 957 fail_devreg:
 958         HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
 959 }
 960
 961
 962 /* This implementation currently only scans the config rom and its
 963  * immediate unit directories looking for software_id and
 964  * software_version entries, in order to get driver autoloading working. */
 965 static struct unit_directory *nodemgr_process_unit_directory
 966         (struct node_entry *ne, struct csr1212_keyval *ud_kv,
 967          unsigned int *id, struct unit_directory *parent)
 968 {
 969         struct unit_directory *ud;
 970         struct unit_directory *ud_child = NULL;
 971         struct csr1212_dentry *dentry;
 972         struct csr1212_keyval *kv;
 973         u8 last_key_id = 0;
 974
 975         ud = kzalloc(sizeof(*ud), GFP_KERNEL);
 976         if (!ud)
 977                 goto unit_directory_error;
 978
 979         ud->ne = ne;
 980         ud->ignore_driver = ignore_drivers;
 981         ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
 982         ud->directory_id = ud->address & 0xffffff;
 983         ud->ud_kv = ud_kv;
 984         ud->id = (*id)++;
 985
 986         csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
 987                 switch (kv->key.id) {
 988                 case CSR1212_KV_ID_VENDOR:
 989                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
 990                                 ud->vendor_id = kv->value.immediate;
 991                                 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
 992                         }
 993                         break;
 994
 995                 case CSR1212_KV_ID_MODEL:
 996                         ud->model_id = kv->value.immediate;
 997                         ud->flags |= UNIT_DIRECTORY_MODEL_ID;
 998                         break;
 999
1000                 case CSR1212_KV_ID_SPECIFIER_ID:
1001                         ud->specifier_id = kv->value.immediate;
1002                         ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1003                         break;
1004
1005                 case CSR1212_KV_ID_VERSION:
1006                         ud->version = kv->value.immediate;
1007                         ud->flags |= UNIT_DIRECTORY_VERSION;
1008                         break;
1009
1010                 case CSR1212_KV_ID_DESCRIPTOR:
1011                         if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1012                             CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1013                             CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1014                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1015                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1016                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1017                                 switch (last_key_id) {
1018                                 case CSR1212_KV_ID_VENDOR:
1019                                         csr1212_keep_keyval(kv);
1020                                         ud->vendor_name_kv = kv;
1021                                         break;
1022
1023                                 case CSR1212_KV_ID_MODEL:
1024                                         csr1212_keep_keyval(kv);
1025                                         ud->model_name_kv = kv;
1026                                         break;
1027
1028                                 }
1029                         } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1030                         break;
1031
1032                 case CSR1212_KV_ID_DEPENDENT_INFO:
1033                         /* Logical Unit Number */
1034                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1035                                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1036                                         ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1037                                         if (!ud_child)
1038                                                 goto unit_directory_error;
1039                                         nodemgr_register_device(ne, ud_child, &ne->device);
1040                                         ud_child = NULL;
1041
1042                                         ud->id = (*id)++;
1043                                 }
1044                                 ud->lun = kv->value.immediate;
1045                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1046
1047                         /* Logical Unit Directory */
1048                         } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1049                                 /* This should really be done in SBP2 as this is
1050                                  * doing SBP2 specific parsing.
1051                                  */
1052
1053                                 /* first register the parent unit */
1054                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1055                                 if (ud->device.bus != &ieee1394_bus_type)
1056                                         nodemgr_register_device(ne, ud, &ne->device);
1057
1058                                 /* process the child unit */
1059                                 ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
1060
1061                                 if (ud_child == NULL)
1062                                         break;
1063
1064                                 /* inherit unspecified values, the driver core picks it up */
1065                                 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1066                                     !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1067                                 {
1068                                         ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
1069                                         ud_child->model_id = ud->model_id;
1070                                 }
1071                                 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1072                                     !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1073                                 {
1074                                         ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
1075                                         ud_child->specifier_id = ud->specifier_id;
1076                                 }
1077                                 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1078                                     !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1079                                 {
1080                                         ud_child->flags |=  UNIT_DIRECTORY_VERSION;
1081                                         ud_child->version = ud->version;
1082                                 }
1083
1084                                 /* register the child unit */
1085                                 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1086                                 nodemgr_register_device(ne, ud_child, &ud->device);
1087                         }
1088
1089                         break;
1090
1091                 case CSR1212_KV_ID_DIRECTORY_ID:
1092                         ud->directory_id = kv->value.immediate;
1093                         break;
1094
1095                 default:
1096                         break;
1097                 }
1098                 last_key_id = kv->key.id;
1099         }
1100
1101         /* do not process child units here and only if not already registered */
1102         if (!parent && ud->device.bus != &ieee1394_bus_type)
1103                 nodemgr_register_device(ne, ud, &ne->device);
1104
1105         return ud;
1106
1107 unit_directory_error:
1108         kfree(ud);
1109         return NULL;
1110 }
1111
1112
1113 static void nodemgr_process_root_directory(struct node_entry *ne)
1114 {
1115         unsigned int ud_id = 0;
1116         struct csr1212_dentry *dentry;
1117         struct csr1212_keyval *kv, *vendor_name_kv = NULL;
1118         u8 last_key_id = 0;
1119
1120         ne->needs_probe = false;
1121
1122         csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1123                 switch (kv->key.id) {
1124                 case CSR1212_KV_ID_VENDOR:
1125                         ne->vendor_id = kv->value.immediate;
1126                         break;
1127
1128                 case CSR1212_KV_ID_NODE_CAPABILITIES:
1129                         ne->capabilities = kv->value.immediate;
1130                         break;
1131
1132                 case CSR1212_KV_ID_UNIT:
1133                         nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
1134                         break;
1135
1136                 case CSR1212_KV_ID_DESCRIPTOR:
1137                         if (last_key_id == CSR1212_KV_ID_VENDOR) {
1138                                 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1139                                     CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1140                                     CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1141                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1142                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1143                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1144                                         csr1212_keep_keyval(kv);
1145                                         vendor_name_kv = kv;
1146                                 }
1147                         }
1148                         break;
1149                 }
1150                 last_key_id = kv->key.id;
1151         }
1152
1153         if (ne->vendor_name_kv) {
1154                 kv = ne->vendor_name_kv;
1155                 ne->vendor_name_kv = vendor_name_kv;
1156                 csr1212_release_keyval(kv);
1157         } else if (vendor_name_kv) {
1158                 ne->vendor_name_kv = vendor_name_kv;
1159                 if (device_create_file(&ne->device,
1160                                        &dev_attr_ne_vendor_name_kv) != 0)
1161                         HPSB_ERR("Failed to add sysfs attribute");
1162         }
1163 }
1164
1165 #ifdef CONFIG_HOTPLUG
1166
1167 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1168 {
1169         struct unit_directory *ud;
1170         int retval = 0;
1171         /* ieee1394:venNmoNspNverN */
1172         char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1173
1174         if (!dev)
1175                 return -ENODEV;
1176
1177         ud = container_of(dev, struct unit_directory, unit_dev);
1178
1179         if (ud->ne->in_limbo || ud->ignore_driver)
1180                 return -ENODEV;
1181
1182 #define PUT_ENVP(fmt,val)                                       \
1183 do {                                                            \
1184         retval = add_uevent_var(env, fmt, val);         \
1185         if (retval)                                             \
1186                 return retval;                                  \
1187 } while (0)
1188
1189         PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1190         PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1191         PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1192         PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1193         PUT_ENVP("VERSION=%06x", ud->version);
1194         snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1195                         ud->vendor_id,
1196                         ud->model_id,
1197                         ud->specifier_id,
1198                         ud->version);
1199         PUT_ENVP("MODALIAS=%s", buf);
1200
1201 #undef PUT_ENVP
1202
1203         return 0;
1204 }
1205
1206 #else
1207
1208 static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1209 {
1210         return -ENODEV;
1211 }
1212
1213 #endif /* CONFIG_HOTPLUG */
1214
1215
1216 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1217                              struct module *owner)
1218 {
1219         int error;
1220
1221         drv->driver.bus = &ieee1394_bus_type;
1222         drv->driver.owner = owner;
1223         drv->driver.name = drv->name;
1224
1225         /* This will cause a probe for devices */
1226         error = driver_register(&drv->driver);
1227         if (!error)
1228                 nodemgr_create_drv_files(drv);
1229         return error;
1230 }
1231
1232 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1233 {
1234         nodemgr_remove_drv_files(driver);
1235         /* This will subsequently disconnect all devices that our driver
1236          * is attached to. */
1237         driver_unregister(&driver->driver);
1238 }
1239
1240
1241 /*
1242  * This function updates nodes that were present on the bus before the
1243  * reset and still are after the reset.  The nodeid and the config rom
1244  * may have changed, and the drivers managing this device must be
1245  * informed that this device just went through a bus reset, to allow
1246  * the to take whatever actions required.
1247  */
1248 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1249                                 nodeid_t nodeid, unsigned int generation)
1250 {
1251         if (ne->nodeid != nodeid) {
1252                 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1253                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1254                            NODE_BUS_ARGS(ne->host, nodeid));
1255                 ne->nodeid = nodeid;
1256         }
1257
1258         if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1259                 kfree(ne->csr->private);
1260                 csr1212_destroy_csr(ne->csr);
1261                 ne->csr = csr;
1262
1263                 /* If the node's configrom generation has changed, we
1264                  * unregister all the unit directories. */
1265                 nodemgr_remove_uds(ne);
1266
1267                 nodemgr_update_bus_options(ne);
1268
1269                 /* Mark the node as new, so it gets re-probed */
1270                 ne->needs_probe = true;
1271         } else {
1272                 /* old cache is valid, so update its generation */
1273                 struct nodemgr_csr_info *ci = ne->csr->private;
1274                 ci->generation = generation;
1275                 /* free the partially filled now unneeded new cache */
1276                 kfree(csr->private);
1277                 csr1212_destroy_csr(csr);
1278         }
1279
1280         /* Mark the node current */
1281         ne->generation = generation;
1282
1283         if (ne->in_limbo) {
1284                 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1285                 ne->in_limbo = false;
1286
1287                 HPSB_DEBUG("Node reactivated: "
1288                            "ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1289                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1290                            (unsigned long long)ne->guid);
1291         }
1292 }
1293
1294 static void nodemgr_node_scan_one(struct hpsb_host *host,
1295                                   nodeid_t nodeid, int generation)
1296 {
1297         struct node_entry *ne;
1298         octlet_t guid;
1299         struct csr1212_csr *csr;
1300         struct nodemgr_csr_info *ci;
1301         u8 *speed;
1302
1303         ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1304         if (!ci)
1305                 return;
1306
1307         ci->host = host;
1308         ci->nodeid = nodeid;
1309         ci->generation = generation;
1310
1311         /* Prepare for speed probe which occurs when reading the ROM */
1312         speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1313         if (*speed > host->csr.lnk_spd)
1314                 *speed = host->csr.lnk_spd;
1315         ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1316
1317         /* We need to detect when the ConfigROM's generation has changed,
1318          * so we only update the node's info when it needs to be.  */
1319
1320         csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1321         if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1322                 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1323                          NODE_BUS_ARGS(host, nodeid));
1324                 if (csr)
1325                         csr1212_destroy_csr(csr);
1326                 kfree(ci);
1327                 return;
1328         }
1329
1330         if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1331                 /* This isn't a 1394 device, but we let it slide. There
1332                  * was a report of a device with broken firmware which
1333                  * reported '2394' instead of '1394', which is obviously a
1334                  * mistake. One would hope that a non-1394 device never
1335                  * gets connected to Firewire bus. If someone does, we
1336                  * shouldn't be held responsible, so we'll allow it with a
1337                  * warning.  */
1338                 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1339                           NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1340         }
1341
1342         guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1343         ne = find_entry_by_guid(guid);
1344
1345         if (ne && ne->host != host && ne->in_limbo) {
1346                 /* Must have moved this device from one host to another */
1347                 nodemgr_remove_ne(ne);
1348                 ne = NULL;
1349         }
1350
1351         if (!ne)
1352                 nodemgr_create_node(guid, csr, host, nodeid, generation);
1353         else
1354                 nodemgr_update_node(ne, csr, nodeid, generation);
1355 }
1356
1357
1358 static void nodemgr_node_scan(struct hpsb_host *host, int generation)
1359 {
1360         int count;
1361         struct selfid *sid = (struct selfid *)host->topology_map;
1362         nodeid_t nodeid = LOCAL_BUS;
1363
1364         /* Scan each node on the bus */
1365         for (count = host->selfid_count; count; count--, sid++) {
1366                 if (sid->extended)
1367                         continue;
1368
1369                 if (!sid->link_active) {
1370                         nodeid++;
1371                         continue;
1372                 }
1373                 nodemgr_node_scan_one(host, nodeid++, generation);
1374         }
1375 }
1376
1377 static void nodemgr_pause_ne(struct node_entry *ne)
1378 {
1379         HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1380                    NODE_BUS_ARGS(ne->host, ne->nodeid),
1381                    (unsigned long long)ne->guid);
1382
1383         ne->in_limbo = true;
1384         WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1385 }
1386
1387 static int update_pdrv(struct device *dev, void *data)
1388 {
1389         struct unit_directory *ud;
1390         struct device_driver *drv;
1391         struct hpsb_protocol_driver *pdrv;
1392         struct node_entry *ne = data;
1393         int error;
1394
1395         ud = container_of(dev, struct unit_directory, unit_dev);
1396         if (ud->ne == ne) {
1397                 drv = get_driver(ud->device.driver);
1398                 if (drv) {
1399                         error = 0;
1400                         pdrv = container_of(drv, struct hpsb_protocol_driver,
1401                                             driver);
1402                         if (pdrv->update) {
1403                                 down(&ud->device.sem);
1404                                 error = pdrv->update(ud);
1405                                 up(&ud->device.sem);
1406                         }
1407                         if (error)
1408                                 device_release_driver(&ud->device);
1409                         put_driver(drv);
1410                 }
1411         }
1412
1413         return 0;
1414 }
1415
1416 static void nodemgr_update_pdrv(struct node_entry *ne)
1417 {
1418         class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
1419 }
1420
1421 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3.  This
1422  * seems like an optional service but in the end it is practically mandatory
1423  * as a consequence of these clauses.
1424  *
1425  * Note that we cannot do a broadcast write to all nodes at once because some
1426  * pre-1394a devices would hang. */
1427 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1428 {
1429         const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1430         quadlet_t bc_remote, bc_local;
1431         int error;
1432
1433         if (!ne->host->is_irm || ne->generation != generation ||
1434             ne->nodeid == ne->host->node_id)
1435                 return;
1436
1437         bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1438
1439         /* Check if the register is implemented and 1394a compliant. */
1440         error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1441                           sizeof(bc_remote));
1442         if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1443             bc_remote != bc_local)
1444                 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1445 }
1446
1447
1448 static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
1449                              int generation)
1450 {
1451         struct device *dev;
1452
1453         if (ne->host != host || ne->in_limbo)
1454                 return;
1455
1456         dev = get_device(&ne->device);
1457         if (!dev)
1458                 return;
1459
1460         nodemgr_irm_write_bc(ne, generation);
1461
1462         /* If "needs_probe", then this is either a new or changed node we
1463          * rescan totally. If the generation matches for an existing node
1464          * (one that existed prior to the bus reset) we send update calls
1465          * down to the drivers. Otherwise, this is a dead node and we
1466          * suspend it. */
1467         if (ne->needs_probe)
1468                 nodemgr_process_root_directory(ne);
1469         else if (ne->generation == generation)
1470                 nodemgr_update_pdrv(ne);
1471         else
1472                 nodemgr_pause_ne(ne);
1473
1474         put_device(dev);
1475 }
1476
1477 struct node_probe_parameter {
1478         struct hpsb_host *host;
1479         int generation;
1480         bool probe_now;
1481 };
1482
1483 static int node_probe(struct device *dev, void *data)
1484 {
1485         struct node_probe_parameter *p = data;
1486         struct node_entry *ne;
1487
1488         if (p->generation != get_hpsb_generation(p->host))
1489                 return -EAGAIN;
1490
1491         ne = container_of(dev, struct node_entry, node_dev);
1492         if (ne->needs_probe == p->probe_now)
1493                 nodemgr_probe_ne(p->host, ne, p->generation);
1494         return 0;
1495 }
1496
1497 static int nodemgr_node_probe(struct hpsb_host *host, int generation)
1498 {
1499         struct node_probe_parameter p;
1500
1501         p.host = host;
1502         p.generation = generation;
1503         /*
1504          * Do some processing of the nodes we've probed. This pulls them
1505          * into the sysfs layer if needed, and can result in processing of
1506          * unit-directories, or just updating the node and it's
1507          * unit-directories.
1508          *
1509          * Run updates before probes. Usually, updates are time-critical
1510          * while probes are time-consuming.
1511          *
1512          * Meanwhile, another bus reset may have happened. In this case we
1513          * skip everything here and let the next bus scan handle it.
1514          * Otherwise we may prematurely remove nodes which are still there.
1515          */
1516         p.probe_now = false;
1517         if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1518                 return 0;
1519
1520         p.probe_now = true;
1521         if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1522                 return 0;
1523         /*
1524          * Now let's tell the bus to rescan our devices. This may seem
1525          * like overhead, but the driver-model core will only scan a
1526          * device for a driver when either the device is added, or when a
1527          * new driver is added. A bus reset is a good reason to rescan
1528          * devices that were there before.  For example, an sbp2 device
1529          * may become available for login, if the host that held it was
1530          * just removed.
1531          */
1532         if (bus_rescan_devices(&ieee1394_bus_type) != 0)
1533                 HPSB_DEBUG("bus_rescan_devices had an error");
1534
1535         return 1;
1536 }
1537
1538 static int remove_nodes_in_limbo(struct device *dev, void *data)
1539 {
1540         struct node_entry *ne;
1541
1542         if (dev->bus != &ieee1394_bus_type)
1543                 return 0;
1544
1545         ne = container_of(dev, struct node_entry, device);
1546         if (ne->in_limbo)
1547                 nodemgr_remove_ne(ne);
1548
1549         return 0;
1550 }
1551
1552 static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
1553 {
1554         device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
1555 }
1556
1557 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1558 {
1559         struct hpsb_packet *packet;
1560         int error = -ENOMEM;
1561
1562         packet = hpsb_make_phypacket(host,
1563                         EXTPHYPACKET_TYPE_RESUME |
1564                         NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1565         if (packet) {
1566                 packet->no_waiter = 1;
1567                 packet->generation = get_hpsb_generation(host);
1568                 error = hpsb_send_packet(packet);
1569         }
1570         if (error)
1571                 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1572                           host->id);
1573         return error;
1574 }
1575
1576 /* Perform a few high-level IRM responsibilities. */
1577 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1578 {
1579         quadlet_t bc;
1580
1581         /* if irm_id == -1 then there is no IRM on this bus */
1582         if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1583                 return 1;
1584
1585         /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1586         host->csr.broadcast_channel |= 0x40000000;
1587
1588         /* If there is no bus manager then we should set the root node's
1589          * force_root bit to promote bus stability per the 1394
1590          * spec. (8.4.2.6) */
1591         if (host->busmgr_id == 0xffff && host->node_count > 1)
1592         {
1593                 u16 root_node = host->node_count - 1;
1594
1595                 /* get cycle master capability flag from root node */
1596                 if (host->is_cycmst ||
1597                     (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1598                                 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1599                                 &bc, sizeof(quadlet_t)) &&
1600                      be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1601                         hpsb_send_phy_config(host, root_node, -1);
1602                 else {
1603                         HPSB_DEBUG("The root node is not cycle master capable; "
1604                                    "selecting a new root node and resetting...");
1605
1606                         if (cycles >= 5) {
1607                                 /* Oh screw it! Just leave the bus as it is */
1608                                 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1609                                 return 1;
1610                         }
1611
1612                         hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1613                         hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1614
1615                         return 0;
1616                 }
1617         }
1618
1619         /* Some devices suspend their ports while being connected to an inactive
1620          * host adapter, i.e. if connected before the low-level driver is
1621          * loaded.  They become visible either when physically unplugged and
1622          * replugged, or when receiving a resume packet.  Send one once. */
1623         if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1624                 host->resume_packet_sent = 1;
1625
1626         return 1;
1627 }
1628
1629 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1630  * everything we can do, otherwise issue a bus reset and try to become the IRM
1631  * ourselves. */
1632 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1633 {
1634         quadlet_t bc;
1635         int status;
1636
1637         if (hpsb_disable_irm || host->is_irm)
1638                 return 1;
1639
1640         status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1641                            get_hpsb_generation(host),
1642                            (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1643                            &bc, sizeof(quadlet_t));
1644
1645         if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1646                 /* The current irm node does not have a valid BROADCAST_CHANNEL
1647                  * register and we do, so reset the bus with force_root set */
1648                 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1649
1650                 if (cycles >= 5) {
1651                         /* Oh screw it! Just leave the bus as it is */
1652                         HPSB_DEBUG("Stopping reset loop for IRM sanity");
1653                         return 1;
1654                 }
1655
1656                 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1657                 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1658
1659                 return 0;
1660         }
1661
1662         return 1;
1663 }
1664
1665 static int nodemgr_host_thread(void *data)
1666 {
1667         struct hpsb_host *host = data;
1668         unsigned int g, generation = 0;
1669         int i, reset_cycles = 0;
1670
1671         set_freezable();
1672         /* Setup our device-model entries */
1673         nodemgr_create_host_dev_files(host);
1674
1675         for (;;) {
1676                 /* Sleep until next bus reset */
1677                 set_current_state(TASK_INTERRUPTIBLE);
1678                 if (get_hpsb_generation(host) == generation &&
1679                     !kthread_should_stop())
1680                         schedule();
1681                 __set_current_state(TASK_RUNNING);
1682
1683                 /* Thread may have been woken up to freeze or to exit */
1684                 if (try_to_freeze())
1685                         continue;
1686                 if (kthread_should_stop())
1687                         goto exit;
1688
1689                 /* Pause for 1/4 second in 1/16 second intervals,
1690                  * to make sure things settle down. */
1691                 g = get_hpsb_generation(host);
1692                 for (i = 0; i < 4 ; i++) {
1693                         msleep_interruptible(63);
1694                         try_to_freeze();
1695                         if (kthread_should_stop())
1696                                 goto exit;
1697
1698                         /* Now get the generation in which the node ID's we collect
1699                          * are valid.  During the bus scan we will use this generation
1700                          * for the read transactions, so that if another reset occurs
1701                          * during the scan the transactions will fail instead of
1702                          * returning bogus data. */
1703                         generation = get_hpsb_generation(host);
1704
1705                         /* If we get a reset before we are done waiting, then
1706                          * start the waiting over again */
1707                         if (generation != g)
1708                                 g = generation, i = 0;
1709                 }
1710
1711                 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1712                     !nodemgr_do_irm_duties(host, reset_cycles)) {
1713                         reset_cycles++;
1714                         continue;
1715                 }
1716                 reset_cycles = 0;
1717
1718                 /* Scan our nodes to get the bus options and create node
1719                  * entries. This does not do the sysfs stuff, since that
1720                  * would trigger uevents and such, which is a bad idea at
1721                  * this point. */
1722                 nodemgr_node_scan(host, generation);
1723
1724                 /* This actually does the full probe, with sysfs
1725                  * registration. */
1726                 if (!nodemgr_node_probe(host, generation))
1727                         continue;
1728
1729                 /* Update some of our sysfs symlinks */
1730                 nodemgr_update_host_dev_links(host);
1731
1732                 /* Sleep 3 seconds */
1733                 for (i = 3000/200; i; i--) {
1734                         msleep_interruptible(200);
1735                         try_to_freeze();
1736                         if (kthread_should_stop())
1737                                 goto exit;
1738
1739                         if (generation != get_hpsb_generation(host))
1740                                 break;
1741                 }
1742                 /* Remove nodes which are gone, unless a bus reset happened */
1743                 if (!i)
1744                         nodemgr_remove_nodes_in_limbo(host);
1745         }
1746 exit:
1747         HPSB_VERBOSE("NodeMgr: Exiting thread");
1748         return 0;
1749 }
1750
1751 struct per_host_parameter {
1752         void *data;
1753         int (*cb)(struct hpsb_host *, void *);
1754 };
1755
1756 static int per_host(struct device *dev, void *data)
1757 {
1758         struct hpsb_host *host;
1759         struct per_host_parameter *p = data;
1760
1761         host = container_of(dev, struct hpsb_host, host_dev);
1762         return p->cb(host, p->data);
1763 }
1764
1765 /**
1766  * nodemgr_for_each_host - call a function for each IEEE 1394 host
1767  * @data: an address to supply to the callback
1768  * @cb: function to call for each host
1769  *
1770  * Iterate the hosts, calling a given function with supplied data for each host.
1771  * If the callback fails on a host, i.e. if it returns a non-zero value, the
1772  * iteration is stopped.
1773  *
1774  * Return value: 0 on success, non-zero on failure (same as returned by last run
1775  * of the callback).
1776  */
1777 int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
1778 {
1779         struct per_host_parameter p;
1780
1781         p.cb = cb;
1782         p.data = data;
1783         return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
1784 }
1785
1786 /* The following two convenience functions use a struct node_entry
1787  * for addressing a node on the bus.  They are intended for use by any
1788  * process context, not just the nodemgr thread, so we need to be a
1789  * little careful when reading out the node ID and generation.  The
1790  * thing that can go wrong is that we get the node ID, then a bus
1791  * reset occurs, and then we read the generation.  The node ID is
1792  * possibly invalid, but the generation is current, and we end up
1793  * sending a packet to a the wrong node.
1794  *
1795  * The solution is to make sure we read the generation first, so that
1796  * if a reset occurs in the process, we end up with a stale generation
1797  * and the transactions will fail instead of silently using wrong node
1798  * ID's.
1799  */
1800
1801 /**
1802  * hpsb_node_fill_packet - fill some destination information into a packet
1803  * @ne: destination node
1804  * @packet: packet to fill in
1805  *
1806  * This will fill in the given, pre-initialised hpsb_packet with the current
1807  * information from the node entry (host, node ID, bus generation number).
1808  */
1809 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
1810 {
1811         packet->host = ne->host;
1812         packet->generation = ne->generation;
1813         barrier();
1814         packet->node_id = ne->nodeid;
1815 }
1816
1817 int hpsb_node_write(struct node_entry *ne, u64 addr,
1818                     quadlet_t *buffer, size_t length)
1819 {
1820         unsigned int generation = ne->generation;
1821
1822         barrier();
1823         return hpsb_write(ne->host, ne->nodeid, generation,
1824                           addr, buffer, length);
1825 }
1826
1827 static void nodemgr_add_host(struct hpsb_host *host)
1828 {
1829         struct host_info *hi;
1830
1831         hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1832         if (!hi) {
1833                 HPSB_ERR("NodeMgr: out of memory in add host");
1834                 return;
1835         }
1836         hi->host = host;
1837         hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
1838                                  host->id);
1839         if (IS_ERR(hi->thread)) {
1840                 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1841                 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1842         }
1843 }
1844
1845 static void nodemgr_host_reset(struct hpsb_host *host)
1846 {
1847         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1848
1849         if (hi) {
1850                 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1851                 wake_up_process(hi->thread);
1852         }
1853 }
1854
1855 static void nodemgr_remove_host(struct hpsb_host *host)
1856 {
1857         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1858
1859         if (hi) {
1860                 kthread_stop(hi->thread);
1861                 nodemgr_remove_host_dev(&host->device);
1862         }
1863 }
1864
1865 static struct hpsb_highlevel nodemgr_highlevel = {
1866         .name =         "Node manager",
1867         .add_host =     nodemgr_add_host,
1868         .host_reset =   nodemgr_host_reset,
1869         .remove_host =  nodemgr_remove_host,
1870 };
1871
1872 int init_ieee1394_nodemgr(void)
1873 {
1874         int error;
1875
1876         error = class_register(&nodemgr_ne_class);
1877         if (error)
1878                 goto fail_ne;
1879         error = class_register(&nodemgr_ud_class);
1880         if (error)
1881                 goto fail_ud;
1882         error = driver_register(&nodemgr_mid_layer_driver);
1883         if (error)
1884                 goto fail_ml;
1885         /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1886         nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1887
1888         hpsb_register_highlevel(&nodemgr_highlevel);
1889         return 0;
1890
1891 fail_ml:
1892         class_unregister(&nodemgr_ud_class);
1893 fail_ud:
1894         class_unregister(&nodemgr_ne_class);
1895 fail_ne:
1896         return error;
1897 }
1898
1899 void cleanup_ieee1394_nodemgr(void)
1900 {
1901         hpsb_unregister_highlevel(&nodemgr_highlevel);
1902         driver_unregister(&nodemgr_mid_layer_driver);
1903         class_unregister(&nodemgr_ud_class);
1904         class_unregister(&nodemgr_ne_class);
1905 }