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