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/kernel.h>
  12 #include <linux/config.h>
  13 #include <linux/list.h>
  14 #include <linux/slab.h>
  15 #include <linux/smp_lock.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/kmod.h>
  18 #include <linux/completion.h>
  19 #include <linux/delay.h>
  20 #include <linux/pci.h>
  21 #include <linux/moduleparam.h>
  22 #include <asm/atomic.h>
  23
  24 #include "ieee1394_types.h"
  25 #include "ieee1394.h"
  26 #include "ieee1394_core.h"
  27 #include "hosts.h"
  28 #include "ieee1394_transactions.h"
  29 #include "highlevel.h"
  30 #include "csr.h"
  31 #include "nodemgr.h"
  32
  33 static int ignore_drivers;
  34 module_param(ignore_drivers, int, 0444);
  35 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
  36
  37 struct nodemgr_csr_info {
  38         struct hpsb_host *host;
  39         nodeid_t nodeid;
  40         unsigned int generation;
  41         unsigned int speed_unverified:1;
  42 };
  43
  44
  45 static char *nodemgr_find_oui_name(int oui)
  46 {
  47 #ifdef CONFIG_IEEE1394_OUI_DB
  48         extern struct oui_list_struct {
  49                 int oui;
  50                 char *name;
  51         } oui_list[];
  52         int i;
  53
  54         for (i = 0; oui_list[i].name; i++)
  55                 if (oui_list[i].oui == oui)
  56                         return oui_list[i].name;
  57 #endif
  58         return NULL;
  59 }
  60
  61 /*
  62  * Correct the speed map entry.  This is necessary
  63  *  - for nodes with link speed < phy speed,
  64  *  - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
  65  * A possible speed is determined by trial and error, using quadlet reads.
  66  */
  67 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
  68                                quadlet_t *buffer)
  69 {
  70         quadlet_t q;
  71         u8 i, *speed, old_speed, good_speed;
  72         int ret;
  73
  74         speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid);
  75         old_speed = *speed;
  76         good_speed = IEEE1394_SPEED_MAX + 1;
  77
  78         /* Try every speed from S100 to old_speed.
  79          * If we did it the other way around, a too low speed could be caught
  80          * if the retry succeeded for some other reason, e.g. because the link
  81          * just finished its initialization. */
  82         for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
  83                 *speed = i;
  84                 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
  85                                 &q, sizeof(quadlet_t));
  86                 if (ret)
  87                         break;
  88                 *buffer = q;
  89                 good_speed = i;
  90         }
  91         if (good_speed <= IEEE1394_SPEED_MAX) {
  92                 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
  93                            NODE_BUS_ARGS(ci->host, ci->nodeid),
  94                            hpsb_speedto_str[good_speed]);
  95                 *speed = good_speed;
  96                 ci->speed_unverified = 0;
  97                 return 0;
  98         }
  99         *speed = old_speed;
 100         return ret;
 101 }
 102
 103 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
 104                             void *buffer, void *__ci)
 105 {
 106         struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
 107         int i, ret;
 108
 109         for (i = 1; ; i++) {
 110                 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
 111                                 buffer, length);
 112                 if (!ret) {
 113                         ci->speed_unverified = 0;
 114                         break;
 115                 }
 116                 /* Give up after 3rd failure. */
 117                 if (i == 3)
 118                         break;
 119
 120                 /* The ieee1394_core guessed the node's speed capability from
 121                  * the self ID.  Check whether a lower speed works. */
 122                 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
 123                         ret = nodemgr_check_speed(ci, addr, buffer);
 124                         if (!ret)
 125                                 break;
 126                 }
 127                 if (msleep_interruptible(334))
 128                         return -EINTR;
 129         }
 130         return ret;
 131 }
 132
 133 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
 134 {
 135         return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
 136 }
 137
 138 static struct csr1212_bus_ops nodemgr_csr_ops = {
 139         .bus_read =     nodemgr_bus_read,
 140         .get_max_rom =  nodemgr_get_max_rom
 141 };
 142
 143
 144 /*
 145  * Basically what we do here is start off retrieving the bus_info block.
 146  * From there will fill in some info about the node, verify it is of IEEE
 147  * 1394 type, and that the crc checks out ok. After that we start off with
 148  * the root directory, and subdirectories. To do this, we retrieve the
 149  * quadlet header for a directory, find out the length, and retrieve the
 150  * complete directory entry (be it a leaf or a directory). We then process
 151  * it and add the info to our structure for that particular node.
 152  *
 153  * We verify CRC's along the way for each directory/block/leaf. The entire
 154  * node structure is generic, and simply stores the information in a way
 155  * that's easy to parse by the protocol interface.
 156  */
 157
 158 /*
 159  * The nodemgr relies heavily on the Driver Model for device callbacks and
 160  * driver/device mappings. The old nodemgr used to handle all this itself,
 161  * but now we are much simpler because of the LDM.
 162  */
 163
 164 static DECLARE_MUTEX(nodemgr_serialize);
 165
 166 struct host_info {
 167         struct hpsb_host *host;
 168         struct list_head list;
 169         struct completion exited;
 170         struct semaphore reset_sem;
 171         int pid;
 172         char daemon_name[15];
 173         int kill_me;
 174 };
 175
 176 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
 177 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
 178                           char *buffer, int buffer_size);
 179 static void nodemgr_resume_ne(struct node_entry *ne);
 180 static void nodemgr_remove_ne(struct node_entry *ne);
 181 static struct node_entry *find_entry_by_guid(u64 guid);
 182
 183 struct bus_type ieee1394_bus_type = {
 184         .name           = "ieee1394",
 185         .match          = nodemgr_bus_match,
 186 };
 187
 188 static void host_cls_release(struct class_device *class_dev)
 189 {
 190         put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
 191 }
 192
 193 struct class hpsb_host_class = {
 194         .name           = "ieee1394_host",
 195         .release        = host_cls_release,
 196 };
 197
 198 static void ne_cls_release(struct class_device *class_dev)
 199 {
 200         put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
 201 }
 202
 203 static struct class nodemgr_ne_class = {
 204         .name           = "ieee1394_node",
 205         .release        = ne_cls_release,
 206 };
 207
 208 static void ud_cls_release(struct class_device *class_dev)
 209 {
 210         put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
 211 }
 212
 213 /* The name here is only so that unit directory hotplug works with old
 214  * style hotplug, which only ever did unit directories anyway. */
 215 static struct class nodemgr_ud_class = {
 216         .name           = "ieee1394",
 217         .release        = ud_cls_release,
 218         .uevent         = nodemgr_uevent,
 219 };
 220
 221 static struct hpsb_highlevel nodemgr_highlevel;
 222
 223
 224 static void nodemgr_release_ud(struct device *dev)
 225 {
 226         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 227
 228         if (ud->vendor_name_kv)
 229                 csr1212_release_keyval(ud->vendor_name_kv);
 230         if (ud->model_name_kv)
 231                 csr1212_release_keyval(ud->model_name_kv);
 232
 233         kfree(ud);
 234 }
 235
 236 static void nodemgr_release_ne(struct device *dev)
 237 {
 238         struct node_entry *ne = container_of(dev, struct node_entry, device);
 239
 240         if (ne->vendor_name_kv)
 241                 csr1212_release_keyval(ne->vendor_name_kv);
 242
 243         kfree(ne);
 244 }
 245
 246
 247 static void nodemgr_release_host(struct device *dev)
 248 {
 249         struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
 250
 251         csr1212_destroy_csr(host->csr.rom);
 252
 253         kfree(host);
 254 }
 255
 256 static int nodemgr_ud_platform_data;
 257
 258 static struct device nodemgr_dev_template_ud = {
 259         .bus            = &ieee1394_bus_type,
 260         .release        = nodemgr_release_ud,
 261         .platform_data  = &nodemgr_ud_platform_data,
 262 };
 263
 264 static struct device nodemgr_dev_template_ne = {
 265         .bus            = &ieee1394_bus_type,
 266         .release        = nodemgr_release_ne,
 267 };
 268
 269 struct device nodemgr_dev_template_host = {
 270         .bus            = &ieee1394_bus_type,
 271         .release        = nodemgr_release_host,
 272 };
 273
 274
 275 #define fw_attr(class, class_type, field, type, format_string)          \
 276 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
 277 {                                                                       \
 278         class_type *class;                                              \
 279         class = container_of(dev, class_type, device);                  \
 280         return sprintf(buf, format_string, (type)class->field);         \
 281 }                                                                       \
 282 static struct device_attribute dev_attr_##class##_##field = {           \
 283         .attr = {.name = __stringify(field), .mode = S_IRUGO },         \
 284         .show   = fw_show_##class##_##field,                            \
 285 };
 286
 287 #define fw_attr_td(class, class_type, td_kv)                            \
 288 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
 289 {                                                                       \
 290         int len;                                                        \
 291         class_type *class = container_of(dev, class_type, device);      \
 292         len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);   \
 293         memcpy(buf,                                                     \
 294                CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),      \
 295                len);                                                    \
 296         while ((buf + len - 1) == '\0')                                 \
 297                 len--;                                                  \
 298         buf[len++] = '\n';                                              \
 299         buf[len] = '\0';                                                \
 300         return len;                                                     \
 301 }                                                                       \
 302 static struct device_attribute dev_attr_##class##_##td_kv = {           \
 303         .attr = {.name = __stringify(td_kv), .mode = S_IRUGO },         \
 304         .show   = fw_show_##class##_##td_kv,                            \
 305 };
 306
 307
 308 #define fw_drv_attr(field, type, format_string)                 \
 309 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
 310 {                                                               \
 311         struct hpsb_protocol_driver *driver;                    \
 312         driver = container_of(drv, struct hpsb_protocol_driver, driver); \
 313         return sprintf(buf, format_string, (type)driver->field);\
 314 }                                                               \
 315 static struct driver_attribute driver_attr_drv_##field = {      \
 316         .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
 317         .show   = fw_drv_show_##field,                          \
 318 };
 319
 320
 321 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
 322 {
 323         struct node_entry *ne = container_of(dev, struct node_entry, device);
 324
 325         return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
 326                        "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
 327                        ne->busopt.irmc,
 328                        ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
 329                        ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
 330                        ne->busopt.max_rec,
 331                        ne->busopt.max_rom,
 332                        ne->busopt.cyc_clk_acc);
 333 }
 334 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
 335
 336
 337 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
 338 {
 339         struct node_entry *ne = container_of(dev, struct node_entry, device);
 340         return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
 341 }
 342 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
 343
 344
 345 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
 346 {
 347         struct node_entry *ne = container_of(dev, struct node_entry, device);
 348         return sprintf(buf, "%u\n", ne->tpool->allocations);
 349 }
 350 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
 351
 352
 353 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
 354 {
 355         struct node_entry *ne = container_of(dev, struct node_entry, device);
 356 #if (BITS_PER_LONG <= 32)
 357         return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
 358 #else
 359         return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
 360 #endif
 361 }
 362 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
 363
 364
 365 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 366 {
 367         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 368         int state = simple_strtoul(buf, NULL, 10);
 369
 370         if (state == 1) {
 371                 down_write(&dev->bus->subsys.rwsem);
 372                 device_release_driver(dev);
 373                 ud->ignore_driver = 1;
 374                 up_write(&dev->bus->subsys.rwsem);
 375         } else if (!state)
 376                 ud->ignore_driver = 0;
 377
 378         return count;
 379 }
 380 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
 381 {
 382         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 383
 384         return sprintf(buf, "%d\n", ud->ignore_driver);
 385 }
 386 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
 387
 388
 389 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
 390 {
 391         struct node_entry *ne;
 392         u64 guid = (u64)simple_strtoull(buf, NULL, 16);
 393
 394         ne = find_entry_by_guid(guid);
 395
 396         if (ne == NULL || !ne->in_limbo)
 397                 return -EINVAL;
 398
 399         nodemgr_remove_ne(ne);
 400
 401         return count;
 402 }
 403 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
 404 {
 405         return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
 406 }
 407 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
 408
 409 static int nodemgr_rescan_bus_thread(void *__unused)
 410 {
 411         /* No userlevel access needed */
 412         daemonize("kfwrescan");
 413
 414         bus_rescan_devices(&ieee1394_bus_type);
 415
 416         return 0;
 417 }
 418
 419 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
 420 {
 421         int state = simple_strtoul(buf, NULL, 10);
 422
 423         /* Don't wait for this, or care about errors. Root could do
 424          * something stupid and spawn this a lot of times, but that's
 425          * root's fault. */
 426         if (state == 1)
 427                 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
 428
 429         return count;
 430 }
 431 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
 432 {
 433         return sprintf(buf, "You can force a rescan of the bus for "
 434                         "drivers by writing a 1 to this file\n");
 435 }
 436 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
 437
 438
 439 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
 440 {
 441         int state = simple_strtoul(buf, NULL, 10);
 442
 443         if (state == 1)
 444                 ignore_drivers = 1;
 445         else if (!state)
 446                 ignore_drivers = 0;
 447
 448         return count;
 449 }
 450 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
 451 {
 452         return sprintf(buf, "%d\n", ignore_drivers);
 453 }
 454 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
 455
 456
 457 struct bus_attribute *const fw_bus_attrs[] = {
 458         &bus_attr_destroy_node,
 459         &bus_attr_rescan,
 460         &bus_attr_ignore_drivers,
 461         NULL
 462 };
 463
 464
 465 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
 466 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
 467
 468 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
 469 fw_attr_td(ne, struct node_entry, vendor_name_kv)
 470 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
 471
 472 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
 473 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
 474 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
 475 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
 476
 477 static struct device_attribute *const fw_ne_attrs[] = {
 478         &dev_attr_ne_guid,
 479         &dev_attr_ne_guid_vendor_id,
 480         &dev_attr_ne_capabilities,
 481         &dev_attr_ne_vendor_id,
 482         &dev_attr_ne_nodeid,
 483         &dev_attr_bus_options,
 484         &dev_attr_tlabels_free,
 485         &dev_attr_tlabels_allocations,
 486         &dev_attr_tlabels_mask,
 487 };
 488
 489
 490
 491 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
 492 fw_attr(ud, struct unit_directory, length, int, "%d\n")
 493 /* These are all dependent on the value being provided */
 494 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
 495 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
 496 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
 497 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
 498 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
 499 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
 500 fw_attr_td(ud, struct unit_directory, model_name_kv)
 501
 502 static struct device_attribute *const fw_ud_attrs[] = {
 503         &dev_attr_ud_address,
 504         &dev_attr_ud_length,
 505         &dev_attr_ignore_driver,
 506 };
 507
 508
 509 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
 510 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
 511 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
 512 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
 513 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
 514 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
 515 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
 516 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
 517
 518 static struct device_attribute *const fw_host_attrs[] = {
 519         &dev_attr_host_node_count,
 520         &dev_attr_host_selfid_count,
 521         &dev_attr_host_nodes_active,
 522         &dev_attr_host_in_bus_reset,
 523         &dev_attr_host_is_root,
 524         &dev_attr_host_is_cycmst,
 525         &dev_attr_host_is_irm,
 526         &dev_attr_host_is_busmgr,
 527 };
 528
 529
 530 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
 531 {
 532         struct hpsb_protocol_driver *driver;
 533         struct ieee1394_device_id *id;
 534         int length = 0;
 535         char *scratch = buf;
 536
 537         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 538
 539         for (id = driver->id_table; id->match_flags != 0; id++) {
 540                 int need_coma = 0;
 541
 542                 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
 543                         length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
 544                         scratch = buf + length;
 545                         need_coma++;
 546                 }
 547
 548                 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
 549                         length += sprintf(scratch, "%smodel_id=0x%06x",
 550                                           need_coma++ ? "," : "",
 551                                           id->model_id);
 552                         scratch = buf + length;
 553                 }
 554
 555                 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
 556                         length += sprintf(scratch, "%sspecifier_id=0x%06x",
 557                                           need_coma++ ? "," : "",
 558                                           id->specifier_id);
 559                         scratch = buf + length;
 560                 }
 561
 562                 if (id->match_flags & IEEE1394_MATCH_VERSION) {
 563                         length += sprintf(scratch, "%sversion=0x%06x",
 564                                           need_coma++ ? "," : "",
 565                                           id->version);
 566                         scratch = buf + length;
 567                 }
 568
 569                 if (need_coma) {
 570                         *scratch++ = '\n';
 571                         length++;
 572                 }
 573         }
 574
 575         return length;
 576 }
 577 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
 578
 579
 580 fw_drv_attr(name, const char *, "%s\n")
 581
 582 static struct driver_attribute *const fw_drv_attrs[] = {
 583         &driver_attr_drv_name,
 584         &driver_attr_device_ids,
 585 };
 586
 587
 588 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
 589 {
 590         struct device_driver *drv = &driver->driver;
 591         int i;
 592
 593         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 594                 driver_create_file(drv, fw_drv_attrs[i]);
 595 }
 596
 597
 598 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
 599 {
 600         struct device_driver *drv = &driver->driver;
 601         int i;
 602
 603         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 604                 driver_remove_file(drv, fw_drv_attrs[i]);
 605 }
 606
 607
 608 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
 609 {
 610         struct device *dev = &ne->device;
 611         int i;
 612
 613         for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
 614                 device_create_file(dev, fw_ne_attrs[i]);
 615 }
 616
 617
 618 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
 619 {
 620         struct device *dev = &host->device;
 621         int i;
 622
 623         for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
 624                 device_create_file(dev, fw_host_attrs[i]);
 625 }
 626
 627
 628 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
 629
 630 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
 631 {
 632         struct device *dev = &host->device;
 633         struct node_entry *ne;
 634
 635         sysfs_remove_link(&dev->kobj, "irm_id");
 636         sysfs_remove_link(&dev->kobj, "busmgr_id");
 637         sysfs_remove_link(&dev->kobj, "host_id");
 638
 639         if ((ne = find_entry_by_nodeid(host, host->irm_id)))
 640                 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
 641         if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
 642                 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
 643         if ((ne = find_entry_by_nodeid(host, host->node_id)))
 644                 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
 645 }
 646
 647 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
 648 {
 649         struct device *dev = &ud->device;
 650         int i;
 651
 652         for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
 653                 device_create_file(dev, fw_ud_attrs[i]);
 654
 655         if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
 656                 device_create_file(dev, &dev_attr_ud_specifier_id);
 657
 658         if (ud->flags & UNIT_DIRECTORY_VERSION)
 659                 device_create_file(dev, &dev_attr_ud_version);
 660
 661         if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
 662                 device_create_file(dev, &dev_attr_ud_vendor_id);
 663                 if (ud->vendor_name_kv)
 664                         device_create_file(dev, &dev_attr_ud_vendor_name_kv);
 665         }
 666
 667         if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
 668                 device_create_file(dev, &dev_attr_ud_model_id);
 669                 if (ud->model_name_kv)
 670                         device_create_file(dev, &dev_attr_ud_model_name_kv);
 671         }
 672 }
 673
 674
 675 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
 676 {
 677         struct hpsb_protocol_driver *driver;
 678         struct unit_directory *ud;
 679         struct ieee1394_device_id *id;
 680
 681         /* We only match unit directories */
 682         if (dev->platform_data != &nodemgr_ud_platform_data)
 683                 return 0;
 684
 685         ud = container_of(dev, struct unit_directory, device);
 686         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 687
 688         if (ud->ne->in_limbo || ud->ignore_driver)
 689                 return 0;
 690
 691         for (id = driver->id_table; id->match_flags != 0; id++) {
 692                 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
 693                     id->vendor_id != ud->vendor_id)
 694                         continue;
 695
 696                 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
 697                     id->model_id != ud->model_id)
 698                         continue;
 699
 700                 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
 701                     id->specifier_id != ud->specifier_id)
 702                         continue;
 703
 704                 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
 705                     id->version != ud->version)
 706                         continue;
 707
 708                 return 1;
 709         }
 710
 711         return 0;
 712 }
 713
 714
 715 static void nodemgr_remove_uds(struct node_entry *ne)
 716 {
 717         struct class_device *cdev, *next;
 718         struct unit_directory *ud;
 719
 720         list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
 721                 ud = container_of(cdev, struct unit_directory, class_dev);
 722
 723                 if (ud->ne != ne)
 724                         continue;
 725
 726                 class_device_unregister(&ud->class_dev);
 727                 device_unregister(&ud->device);
 728         }
 729 }
 730
 731
 732 static void nodemgr_remove_ne(struct node_entry *ne)
 733 {
 734         struct device *dev = &ne->device;
 735
 736         dev = get_device(&ne->device);
 737         if (!dev)
 738                 return;
 739
 740         HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 741                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
 742
 743         nodemgr_remove_uds(ne);
 744
 745         class_device_unregister(&ne->class_dev);
 746         device_unregister(dev);
 747
 748         put_device(dev);
 749 }
 750
 751 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
 752 {
 753         nodemgr_remove_ne(container_of(dev, struct node_entry, device));
 754         return 0;
 755 }
 756
 757 static void nodemgr_remove_host_dev(struct device *dev)
 758 {
 759         device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
 760         sysfs_remove_link(&dev->kobj, "irm_id");
 761         sysfs_remove_link(&dev->kobj, "busmgr_id");
 762         sysfs_remove_link(&dev->kobj, "host_id");
 763 }
 764
 765
 766 static void nodemgr_update_bus_options(struct node_entry *ne)
 767 {
 768 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
 769         static const u16 mr[] = { 4, 64, 1024, 0};
 770 #endif
 771         quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
 772
 773         ne->busopt.irmc         = (busoptions >> 31) & 1;
 774         ne->busopt.cmc          = (busoptions >> 30) & 1;
 775         ne->busopt.isc          = (busoptions >> 29) & 1;
 776         ne->busopt.bmc          = (busoptions >> 28) & 1;
 777         ne->busopt.pmc          = (busoptions >> 27) & 1;
 778         ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
 779         ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
 780         ne->busopt.max_rom      = (busoptions >> 8) & 0x3;
 781         ne->busopt.generation   = (busoptions >> 4) & 0xf;
 782         ne->busopt.lnkspd       = busoptions & 0x7;
 783
 784         HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
 785                      "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
 786                      busoptions, ne->busopt.irmc, ne->busopt.cmc,
 787                      ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
 788                      ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
 789                      mr[ne->busopt.max_rom],
 790                      ne->busopt.generation, ne->busopt.lnkspd);
 791 }
 792
 793
 794 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
 795                                               struct host_info *hi, nodeid_t nodeid,
 796                                               unsigned int generation)
 797 {
 798         struct hpsb_host *host = hi->host;
 799         struct node_entry *ne;
 800
 801         ne = kzalloc(sizeof(*ne), GFP_KERNEL);
 802         if (!ne)
 803                 return NULL;
 804
 805         ne->tpool = &host->tpool[nodeid & NODE_MASK];
 806
 807         ne->host = host;
 808         ne->nodeid = nodeid;
 809         ne->generation = generation;
 810         ne->needs_probe = 1;
 811
 812         ne->guid = guid;
 813         ne->guid_vendor_id = (guid >> 40) & 0xffffff;
 814         ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
 815         ne->csr = csr;
 816
 817         memcpy(&ne->device, &nodemgr_dev_template_ne,
 818                sizeof(ne->device));
 819         ne->device.parent = &host->device;
 820         snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
 821                  (unsigned long long)(ne->guid));
 822
 823         ne->class_dev.dev = &ne->device;
 824         ne->class_dev.class = &nodemgr_ne_class;
 825         snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
 826                  (unsigned long long)(ne->guid));
 827
 828         device_register(&ne->device);
 829         class_device_register(&ne->class_dev);
 830         get_device(&ne->device);
 831
 832         if (ne->guid_vendor_oui)
 833                 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
 834         nodemgr_create_ne_dev_files(ne);
 835
 836         nodemgr_update_bus_options(ne);
 837
 838         HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 839                    (host->node_id == nodeid) ? "Host" : "Node",
 840                    NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 841
 842         return ne;
 843 }
 844
 845
 846 static struct node_entry *find_entry_by_guid(u64 guid)
 847 {
 848         struct class *class = &nodemgr_ne_class;
 849         struct class_device *cdev;
 850         struct node_entry *ne, *ret_ne = NULL;
 851
 852         down_read(&class->subsys.rwsem);
 853         list_for_each_entry(cdev, &class->children, node) {
 854                 ne = container_of(cdev, struct node_entry, class_dev);
 855
 856                 if (ne->guid == guid) {
 857                         ret_ne = ne;
 858                         break;
 859                 }
 860         }
 861         up_read(&class->subsys.rwsem);
 862
 863         return ret_ne;
 864 }
 865
 866
 867 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
 868 {
 869         struct class *class = &nodemgr_ne_class;
 870         struct class_device *cdev;
 871         struct node_entry *ne, *ret_ne = NULL;
 872
 873         down_read(&class->subsys.rwsem);
 874         list_for_each_entry(cdev, &class->children, node) {
 875                 ne = container_of(cdev, struct node_entry, class_dev);
 876
 877                 if (ne->host == host && ne->nodeid == nodeid) {
 878                         ret_ne = ne;
 879                         break;
 880                 }
 881         }
 882         up_read(&class->subsys.rwsem);
 883
 884         return ret_ne;
 885 }
 886
 887
 888 static void nodemgr_register_device(struct node_entry *ne,
 889         struct unit_directory *ud, struct device *parent)
 890 {
 891         memcpy(&ud->device, &nodemgr_dev_template_ud,
 892                sizeof(ud->device));
 893
 894         ud->device.parent = parent;
 895
 896         snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
 897                  ne->device.bus_id, ud->id);
 898
 899         ud->class_dev.dev = &ud->device;
 900         ud->class_dev.class = &nodemgr_ud_class;
 901         snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
 902                  ne->device.bus_id, ud->id);
 903
 904         device_register(&ud->device);
 905         class_device_register(&ud->class_dev);
 906         get_device(&ud->device);
 907
 908         if (ud->vendor_oui)
 909                 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
 910         nodemgr_create_ud_dev_files(ud);
 911 }
 912
 913
 914 /* This implementation currently only scans the config rom and its
 915  * immediate unit directories looking for software_id and
 916  * software_version entries, in order to get driver autoloading working. */
 917 static struct unit_directory *nodemgr_process_unit_directory
 918         (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
 919          unsigned int *id, struct unit_directory *parent)
 920 {
 921         struct unit_directory *ud;
 922         struct unit_directory *ud_child = NULL;
 923         struct csr1212_dentry *dentry;
 924         struct csr1212_keyval *kv;
 925         u8 last_key_id = 0;
 926
 927         ud = kzalloc(sizeof(*ud), GFP_KERNEL);
 928         if (!ud)
 929                 goto unit_directory_error;
 930
 931         ud->ne = ne;
 932         ud->ignore_driver = ignore_drivers;
 933         ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
 934         ud->ud_kv = ud_kv;
 935         ud->id = (*id)++;
 936
 937         csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
 938                 switch (kv->key.id) {
 939                 case CSR1212_KV_ID_VENDOR:
 940                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
 941                                 ud->vendor_id = kv->value.immediate;
 942                                 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
 943
 944                                 if (ud->vendor_id)
 945                                         ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
 946                         }
 947                         break;
 948
 949                 case CSR1212_KV_ID_MODEL:
 950                         ud->model_id = kv->value.immediate;
 951                         ud->flags |= UNIT_DIRECTORY_MODEL_ID;
 952                         break;
 953
 954                 case CSR1212_KV_ID_SPECIFIER_ID:
 955                         ud->specifier_id = kv->value.immediate;
 956                         ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
 957                         break;
 958
 959                 case CSR1212_KV_ID_VERSION:
 960                         ud->version = kv->value.immediate;
 961                         ud->flags |= UNIT_DIRECTORY_VERSION;
 962                         break;
 963
 964                 case CSR1212_KV_ID_DESCRIPTOR:
 965                         if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
 966                             CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
 967                             CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
 968                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
 969                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
 970                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
 971                                 switch (last_key_id) {
 972                                 case CSR1212_KV_ID_VENDOR:
 973                                         ud->vendor_name_kv = kv;
 974                                         csr1212_keep_keyval(kv);
 975                                         break;
 976
 977                                 case CSR1212_KV_ID_MODEL:
 978                                         ud->model_name_kv = kv;
 979                                         csr1212_keep_keyval(kv);
 980                                         break;
 981
 982                                 }
 983                         } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
 984                         break;
 985
 986                 case CSR1212_KV_ID_DEPENDENT_INFO:
 987                         /* Logical Unit Number */
 988                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
 989                                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
 990                                         ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
 991                                         if (!ud_child)
 992                                                 goto unit_directory_error;
 993                                         memcpy(ud_child, ud, sizeof(*ud_child));
 994                                         nodemgr_register_device(ne, ud_child, &ne->device);
 995                                         ud_child = NULL;
 996
 997                                         ud->id = (*id)++;
 998                                 }
 999                                 ud->lun = kv->value.immediate;
1000                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1001
1002                         /* Logical Unit Directory */
1003                         } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1004                                 /* This should really be done in SBP2 as this is
1005                                  * doing SBP2 specific parsing.
1006                                  */
1007
1008                                 /* first register the parent unit */
1009                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1010                                 if (ud->device.bus != &ieee1394_bus_type)
1011                                         nodemgr_register_device(ne, ud, &ne->device);
1012
1013                                 /* process the child unit */
1014                                 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1015
1016                                 if (ud_child == NULL)
1017                                         break;
1018
1019                                 /* inherit unspecified values, the driver core picks it up */
1020                                 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1021                                     !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1022                                 {
1023                                         ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
1024                                         ud_child->model_id = ud->model_id;
1025                                 }
1026                                 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1027                                     !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1028                                 {
1029                                         ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
1030                                         ud_child->specifier_id = ud->specifier_id;
1031                                 }
1032                                 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1033                                     !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1034                                 {
1035                                         ud_child->flags |=  UNIT_DIRECTORY_VERSION;
1036                                         ud_child->version = ud->version;
1037                                 }
1038
1039                                 /* register the child unit */
1040                                 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1041                                 nodemgr_register_device(ne, ud_child, &ud->device);
1042                         }
1043
1044                         break;
1045
1046                 default:
1047                         break;
1048                 }
1049                 last_key_id = kv->key.id;
1050         }
1051
1052         /* do not process child units here and only if not already registered */
1053         if (!parent && ud->device.bus != &ieee1394_bus_type)
1054                 nodemgr_register_device(ne, ud, &ne->device);
1055
1056         return ud;
1057
1058 unit_directory_error:
1059         kfree(ud);
1060         return NULL;
1061 }
1062
1063
1064 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1065 {
1066         unsigned int ud_id = 0;
1067         struct csr1212_dentry *dentry;
1068         struct csr1212_keyval *kv;
1069         u8 last_key_id = 0;
1070
1071         ne->needs_probe = 0;
1072
1073         csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1074                 switch (kv->key.id) {
1075                 case CSR1212_KV_ID_VENDOR:
1076                         ne->vendor_id = kv->value.immediate;
1077
1078                         if (ne->vendor_id)
1079                                 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1080                         break;
1081
1082                 case CSR1212_KV_ID_NODE_CAPABILITIES:
1083                         ne->capabilities = kv->value.immediate;
1084                         break;
1085
1086                 case CSR1212_KV_ID_UNIT:
1087                         nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1088                         break;
1089
1090                 case CSR1212_KV_ID_DESCRIPTOR:
1091                         if (last_key_id == CSR1212_KV_ID_VENDOR) {
1092                                 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1093                                     CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1094                                     CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1095                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1096                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1097                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1098                                         ne->vendor_name_kv = kv;
1099                                         csr1212_keep_keyval(kv);
1100                                 }
1101                         }
1102                         break;
1103                 }
1104                 last_key_id = kv->key.id;
1105         }
1106
1107         if (ne->vendor_oui)
1108                 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1109         if (ne->vendor_name_kv)
1110                 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1111 }
1112
1113 #ifdef CONFIG_HOTPLUG
1114
1115 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1116                           char *buffer, int buffer_size)
1117 {
1118         struct unit_directory *ud;
1119         int i = 0;
1120         int length = 0;
1121         /* ieee1394:venNmoNspNverN */
1122         char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1123
1124         if (!cdev)
1125                 return -ENODEV;
1126
1127         ud = container_of(cdev, struct unit_directory, class_dev);
1128
1129         if (ud->ne->in_limbo || ud->ignore_driver)
1130                 return -ENODEV;
1131
1132 #define PUT_ENVP(fmt,val)                                       \
1133 do {                                                            \
1134         int printed;                                            \
1135         envp[i++] = buffer;                                     \
1136         printed = snprintf(buffer, buffer_size - length,        \
1137                            fmt, val);                           \
1138         if ((buffer_size - (length+printed) <= 0) || (i >= num_envp))   \
1139                 return -ENOMEM;                                 \
1140         length += printed+1;                                    \
1141         buffer += printed+1;                                    \
1142 } while (0)
1143
1144         PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1145         PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1146         PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1147         PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1148         PUT_ENVP("VERSION=%06x", ud->version);
1149         snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1150                         ud->vendor_id,
1151                         ud->model_id,
1152                         ud->specifier_id,
1153                         ud->version);
1154         PUT_ENVP("MODALIAS=%s", buf);
1155
1156 #undef PUT_ENVP
1157
1158         envp[i] = NULL;
1159
1160         return 0;
1161 }
1162
1163 #else
1164
1165 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1166                           char *buffer, int buffer_size)
1167 {
1168         return -ENODEV;
1169 }
1170
1171 #endif /* CONFIG_HOTPLUG */
1172
1173
1174 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1175 {
1176         int ret;
1177
1178         /* This will cause a probe for devices */
1179         ret = driver_register(&driver->driver);
1180         if (!ret)
1181                 nodemgr_create_drv_files(driver);
1182
1183         return ret;
1184 }
1185
1186 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1187 {
1188         nodemgr_remove_drv_files(driver);
1189         /* This will subsequently disconnect all devices that our driver
1190          * is attached to. */
1191         driver_unregister(&driver->driver);
1192 }
1193
1194
1195 /*
1196  * This function updates nodes that were present on the bus before the
1197  * reset and still are after the reset.  The nodeid and the config rom
1198  * may have changed, and the drivers managing this device must be
1199  * informed that this device just went through a bus reset, to allow
1200  * the to take whatever actions required.
1201  */
1202 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1203                                 struct host_info *hi, nodeid_t nodeid,
1204                                 unsigned int generation)
1205 {
1206         if (ne->nodeid != nodeid) {
1207                 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1208                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1209                            NODE_BUS_ARGS(ne->host, nodeid));
1210                 ne->nodeid = nodeid;
1211         }
1212
1213         if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1214                 kfree(ne->csr->private);
1215                 csr1212_destroy_csr(ne->csr);
1216                 ne->csr = csr;
1217
1218                 /* If the node's configrom generation has changed, we
1219                  * unregister all the unit directories. */
1220                 nodemgr_remove_uds(ne);
1221
1222                 nodemgr_update_bus_options(ne);
1223
1224                 /* Mark the node as new, so it gets re-probed */
1225                 ne->needs_probe = 1;
1226         } else {
1227                 /* old cache is valid, so update its generation */
1228                 struct nodemgr_csr_info *ci = ne->csr->private;
1229                 ci->generation = generation;
1230                 /* free the partially filled now unneeded new cache */
1231                 kfree(csr->private);
1232                 csr1212_destroy_csr(csr);
1233         }
1234
1235         if (ne->in_limbo)
1236                 nodemgr_resume_ne(ne);
1237
1238         /* Mark the node current */
1239         ne->generation = generation;
1240 }
1241
1242
1243
1244 static void nodemgr_node_scan_one(struct host_info *hi,
1245                                   nodeid_t nodeid, int generation)
1246 {
1247         struct hpsb_host *host = hi->host;
1248         struct node_entry *ne;
1249         octlet_t guid;
1250         struct csr1212_csr *csr;
1251         struct nodemgr_csr_info *ci;
1252
1253         ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1254         if (!ci)
1255                 return;
1256
1257         ci->host = host;
1258         ci->nodeid = nodeid;
1259         ci->generation = generation;
1260         ci->speed_unverified =
1261                 host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100;
1262
1263         /* We need to detect when the ConfigROM's generation has changed,
1264          * so we only update the node's info when it needs to be.  */
1265
1266         csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1267         if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1268                 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1269                          NODE_BUS_ARGS(host, nodeid));
1270                 if (csr)
1271                         csr1212_destroy_csr(csr);
1272                 kfree(ci);
1273                 return;
1274         }
1275
1276         if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1277                 /* This isn't a 1394 device, but we let it slide. There
1278                  * was a report of a device with broken firmware which
1279                  * reported '2394' instead of '1394', which is obviously a
1280                  * mistake. One would hope that a non-1394 device never
1281                  * gets connected to Firewire bus. If someone does, we
1282                  * shouldn't be held responsible, so we'll allow it with a
1283                  * warning.  */
1284                 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1285                           NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1286         }
1287
1288         guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1289         ne = find_entry_by_guid(guid);
1290
1291         if (ne && ne->host != host && ne->in_limbo) {
1292                 /* Must have moved this device from one host to another */
1293                 nodemgr_remove_ne(ne);
1294                 ne = NULL;
1295         }
1296
1297         if (!ne)
1298                 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1299         else
1300                 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1301
1302         return;
1303 }
1304
1305
1306 static void nodemgr_node_scan(struct host_info *hi, int generation)
1307 {
1308         int count;
1309         struct hpsb_host *host = hi->host;
1310         struct selfid *sid = (struct selfid *)host->topology_map;
1311         nodeid_t nodeid = LOCAL_BUS;
1312
1313         /* Scan each node on the bus */
1314         for (count = host->selfid_count; count; count--, sid++) {
1315                 if (sid->extended)
1316                         continue;
1317
1318                 if (!sid->link_active) {
1319                         nodeid++;
1320                         continue;
1321                 }
1322                 nodemgr_node_scan_one(hi, nodeid++, generation);
1323         }
1324 }
1325
1326
1327 static void nodemgr_suspend_ne(struct node_entry *ne)
1328 {
1329         struct class_device *cdev;
1330         struct unit_directory *ud;
1331
1332         HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1333                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1334
1335         ne->in_limbo = 1;
1336         device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1337
1338         down_write(&ne->device.bus->subsys.rwsem);
1339         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1340                 ud = container_of(cdev, struct unit_directory, class_dev);
1341
1342                 if (ud->ne != ne)
1343                         continue;
1344
1345                 if (ud->device.driver &&
1346                     (!ud->device.driver->suspend ||
1347                       ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1348                         device_release_driver(&ud->device);
1349         }
1350         up_write(&ne->device.bus->subsys.rwsem);
1351 }
1352
1353
1354 static void nodemgr_resume_ne(struct node_entry *ne)
1355 {
1356         struct class_device *cdev;
1357         struct unit_directory *ud;
1358
1359         ne->in_limbo = 0;
1360         device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1361
1362         down_read(&ne->device.bus->subsys.rwsem);
1363         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1364                 ud = container_of(cdev, struct unit_directory, class_dev);
1365
1366                 if (ud->ne != ne)
1367                         continue;
1368
1369                 if (ud->device.driver && ud->device.driver->resume)
1370                         ud->device.driver->resume(&ud->device);
1371         }
1372         up_read(&ne->device.bus->subsys.rwsem);
1373
1374         HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1375                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1376 }
1377
1378
1379 static void nodemgr_update_pdrv(struct node_entry *ne)
1380 {
1381         struct unit_directory *ud;
1382         struct hpsb_protocol_driver *pdrv;
1383         struct class *class = &nodemgr_ud_class;
1384         struct class_device *cdev;
1385
1386         down_read(&class->subsys.rwsem);
1387         list_for_each_entry(cdev, &class->children, node) {
1388                 ud = container_of(cdev, struct unit_directory, class_dev);
1389                 if (ud->ne != ne || !ud->device.driver)
1390                         continue;
1391
1392                 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1393
1394                 if (pdrv->update && pdrv->update(ud)) {
1395                         down_write(&ud->device.bus->subsys.rwsem);
1396                         device_release_driver(&ud->device);
1397                         up_write(&ud->device.bus->subsys.rwsem);
1398                 }
1399         }
1400         up_read(&class->subsys.rwsem);
1401 }
1402
1403
1404 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3.  This
1405  * seems like an optional service but in the end it is practically mandatory
1406  * as a consequence of these clauses.
1407  *
1408  * Note that we cannot do a broadcast write to all nodes at once because some
1409  * pre-1394a devices would hang. */
1410 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1411 {
1412         const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1413         quadlet_t bc_remote, bc_local;
1414         int ret;
1415
1416         if (!ne->host->is_irm || ne->generation != generation ||
1417             ne->nodeid == ne->host->node_id)
1418                 return;
1419
1420         bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1421
1422         /* Check if the register is implemented and 1394a compliant. */
1423         ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1424                         sizeof(bc_remote));
1425         if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1426             bc_remote != bc_local)
1427                 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1428 }
1429
1430
1431 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1432 {
1433         struct device *dev;
1434
1435         if (ne->host != hi->host || ne->in_limbo)
1436                 return;
1437
1438         dev = get_device(&ne->device);
1439         if (!dev)
1440                 return;
1441
1442         nodemgr_irm_write_bc(ne, generation);
1443
1444         /* If "needs_probe", then this is either a new or changed node we
1445          * rescan totally. If the generation matches for an existing node
1446          * (one that existed prior to the bus reset) we send update calls
1447          * down to the drivers. Otherwise, this is a dead node and we
1448          * suspend it. */
1449         if (ne->needs_probe)
1450                 nodemgr_process_root_directory(hi, ne);
1451         else if (ne->generation == generation)
1452                 nodemgr_update_pdrv(ne);
1453         else
1454                 nodemgr_suspend_ne(ne);
1455
1456         put_device(dev);
1457 }
1458
1459
1460 static void nodemgr_node_probe(struct host_info *hi, int generation)
1461 {
1462         struct hpsb_host *host = hi->host;
1463         struct class *class = &nodemgr_ne_class;
1464         struct class_device *cdev;
1465         struct node_entry *ne;
1466
1467         /* Do some processing of the nodes we've probed. This pulls them
1468          * into the sysfs layer if needed, and can result in processing of
1469          * unit-directories, or just updating the node and it's
1470          * unit-directories.
1471          *
1472          * Run updates before probes. Usually, updates are time-critical
1473          * while probes are time-consuming. (Well, those probes need some
1474          * improvement...) */
1475
1476         down_read(&class->subsys.rwsem);
1477         list_for_each_entry(cdev, &class->children, node) {
1478                 ne = container_of(cdev, struct node_entry, class_dev);
1479                 if (!ne->needs_probe)
1480                         nodemgr_probe_ne(hi, ne, generation);
1481         }
1482         list_for_each_entry(cdev, &class->children, node) {
1483                 ne = container_of(cdev, struct node_entry, class_dev);
1484                 if (ne->needs_probe)
1485                         nodemgr_probe_ne(hi, ne, generation);
1486         }
1487         up_read(&class->subsys.rwsem);
1488
1489
1490         /* If we had a bus reset while we were scanning the bus, it is
1491          * possible that we did not probe all nodes.  In that case, we
1492          * skip the clean up for now, since we could remove nodes that
1493          * were still on the bus.  The bus reset increased hi->reset_sem,
1494          * so there's a bus scan pending which will do the clean up
1495          * eventually.
1496          *
1497          * Now let's tell the bus to rescan our devices. This may seem
1498          * like overhead, but the driver-model core will only scan a
1499          * device for a driver when either the device is added, or when a
1500          * new driver is added. A bus reset is a good reason to rescan
1501          * devices that were there before.  For example, an sbp2 device
1502          * may become available for login, if the host that held it was
1503          * just removed.  */
1504
1505         if (generation == get_hpsb_generation(host))
1506                 bus_rescan_devices(&ieee1394_bus_type);
1507
1508         return;
1509 }
1510
1511 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1512 {
1513         struct hpsb_packet *packet;
1514         int ret = 1;
1515
1516         packet = hpsb_make_phypacket(host,
1517                         EXTPHYPACKET_TYPE_RESUME |
1518                         NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1519         if (packet) {
1520                 packet->no_waiter = 1;
1521                 packet->generation = get_hpsb_generation(host);
1522                 ret = hpsb_send_packet(packet);
1523         }
1524         if (ret)
1525                 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1526                           host->id);
1527         return ret;
1528 }
1529
1530 /* Perform a few high-level IRM responsibilities. */
1531 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1532 {
1533         quadlet_t bc;
1534
1535         /* if irm_id == -1 then there is no IRM on this bus */
1536         if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1537                 return 1;
1538
1539         /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1540         host->csr.broadcast_channel |= 0x40000000;
1541
1542         /* If there is no bus manager then we should set the root node's
1543          * force_root bit to promote bus stability per the 1394
1544          * spec. (8.4.2.6) */
1545         if (host->busmgr_id == 0xffff && host->node_count > 1)
1546         {
1547                 u16 root_node = host->node_count - 1;
1548
1549                 /* get cycle master capability flag from root node */
1550                 if (host->is_cycmst ||
1551                     (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1552                                 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1553                                 &bc, sizeof(quadlet_t)) &&
1554                      be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1555                         hpsb_send_phy_config(host, root_node, -1);
1556                 else {
1557                         HPSB_DEBUG("The root node is not cycle master capable; "
1558                                    "selecting a new root node and resetting...");
1559
1560                         if (cycles >= 5) {
1561                                 /* Oh screw it! Just leave the bus as it is */
1562                                 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1563                                 return 1;
1564                         }
1565
1566                         hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1567                         hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1568
1569                         return 0;
1570                 }
1571         }
1572
1573         /* Some devices suspend their ports while being connected to an inactive
1574          * host adapter, i.e. if connected before the low-level driver is
1575          * loaded.  They become visible either when physically unplugged and
1576          * replugged, or when receiving a resume packet.  Send one once. */
1577         if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1578                 host->resume_packet_sent = 1;
1579
1580         return 1;
1581 }
1582
1583 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1584  * everything we can do, otherwise issue a bus reset and try to become the IRM
1585  * ourselves. */
1586 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1587 {
1588         quadlet_t bc;
1589         int status;
1590
1591         if (hpsb_disable_irm || host->is_irm)
1592                 return 1;
1593
1594         status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1595                            get_hpsb_generation(host),
1596                            (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1597                            &bc, sizeof(quadlet_t));
1598
1599         if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1600                 /* The current irm node does not have a valid BROADCAST_CHANNEL
1601                  * register and we do, so reset the bus with force_root set */
1602                 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1603
1604                 if (cycles >= 5) {
1605                         /* Oh screw it! Just leave the bus as it is */
1606                         HPSB_DEBUG("Stopping reset loop for IRM sanity");
1607                         return 1;
1608                 }
1609
1610                 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1611                 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1612
1613                 return 0;
1614         }
1615
1616         return 1;
1617 }
1618
1619 static int nodemgr_host_thread(void *__hi)
1620 {
1621         struct host_info *hi = (struct host_info *)__hi;
1622         struct hpsb_host *host = hi->host;
1623         int reset_cycles = 0;
1624
1625         /* No userlevel access needed */
1626         daemonize(hi->daemon_name);
1627
1628         /* Setup our device-model entries */
1629         nodemgr_create_host_dev_files(host);
1630
1631         /* Sit and wait for a signal to probe the nodes on the bus. This
1632          * happens when we get a bus reset. */
1633         while (1) {
1634                 unsigned int generation = 0;
1635                 int i;
1636
1637                 if (down_interruptible(&hi->reset_sem) ||
1638                     down_interruptible(&nodemgr_serialize)) {
1639                         if (try_to_freeze())
1640                                 continue;
1641                         printk("NodeMgr: received unexpected signal?!\n" );
1642                         break;
1643                 }
1644
1645                 if (hi->kill_me) {
1646                         up(&nodemgr_serialize);
1647                         break;
1648                 }
1649
1650                 /* Pause for 1/4 second in 1/16 second intervals,
1651                  * to make sure things settle down. */
1652                 for (i = 0; i < 4 ; i++) {
1653                         set_current_state(TASK_INTERRUPTIBLE);
1654                         if (msleep_interruptible(63)) {
1655                                 up(&nodemgr_serialize);
1656                                 goto caught_signal;
1657                         }
1658
1659                         /* Now get the generation in which the node ID's we collect
1660                          * are valid.  During the bus scan we will use this generation
1661                          * for the read transactions, so that if another reset occurs
1662                          * during the scan the transactions will fail instead of
1663                          * returning bogus data. */
1664                         generation = get_hpsb_generation(host);
1665
1666                         /* If we get a reset before we are done waiting, then
1667                          * start the the waiting over again */
1668                         while (!down_trylock(&hi->reset_sem))
1669                                 i = 0;
1670
1671                         /* Check the kill_me again */
1672                         if (hi->kill_me) {
1673                                 up(&nodemgr_serialize);
1674                                 goto caught_signal;
1675                         }
1676                 }
1677
1678                 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1679                     !nodemgr_do_irm_duties(host, reset_cycles)) {
1680                         reset_cycles++;
1681                         up(&nodemgr_serialize);
1682                         continue;
1683                 }
1684                 reset_cycles = 0;
1685
1686                 /* Scan our nodes to get the bus options and create node
1687                  * entries. This does not do the sysfs stuff, since that
1688                  * would trigger uevents and such, which is a bad idea at
1689                  * this point. */
1690                 nodemgr_node_scan(hi, generation);
1691
1692                 /* This actually does the full probe, with sysfs
1693                  * registration. */
1694                 nodemgr_node_probe(hi, generation);
1695
1696                 /* Update some of our sysfs symlinks */
1697                 nodemgr_update_host_dev_links(host);
1698
1699                 up(&nodemgr_serialize);
1700         }
1701
1702 caught_signal:
1703         HPSB_VERBOSE("NodeMgr: Exiting thread");
1704
1705         complete_and_exit(&hi->exited, 0);
1706 }
1707
1708 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1709 {
1710         struct class *class = &hpsb_host_class;
1711         struct class_device *cdev;
1712         struct hpsb_host *host;
1713         int error = 0;
1714
1715         down_read(&class->subsys.rwsem);
1716         list_for_each_entry(cdev, &class->children, node) {
1717                 host = container_of(cdev, struct hpsb_host, class_dev);
1718
1719                 if ((error = cb(host, __data)))
1720                         break;
1721         }
1722         up_read(&class->subsys.rwsem);
1723
1724         return error;
1725 }
1726
1727 /* The following four convenience functions use a struct node_entry
1728  * for addressing a node on the bus.  They are intended for use by any
1729  * process context, not just the nodemgr thread, so we need to be a
1730  * little careful when reading out the node ID and generation.  The
1731  * thing that can go wrong is that we get the node ID, then a bus
1732  * reset occurs, and then we read the generation.  The node ID is
1733  * possibly invalid, but the generation is current, and we end up
1734  * sending a packet to a the wrong node.
1735  *
1736  * The solution is to make sure we read the generation first, so that
1737  * if a reset occurs in the process, we end up with a stale generation
1738  * and the transactions will fail instead of silently using wrong node
1739  * ID's.
1740  */
1741
1742 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1743 {
1744         pkt->host = ne->host;
1745         pkt->generation = ne->generation;
1746         barrier();
1747         pkt->node_id = ne->nodeid;
1748 }
1749
1750 int hpsb_node_write(struct node_entry *ne, u64 addr,
1751                     quadlet_t *buffer, size_t length)
1752 {
1753         unsigned int generation = ne->generation;
1754
1755         barrier();
1756         return hpsb_write(ne->host, ne->nodeid, generation,
1757                           addr, buffer, length);
1758 }
1759
1760 static void nodemgr_add_host(struct hpsb_host *host)
1761 {
1762         struct host_info *hi;
1763
1764         hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1765
1766         if (!hi) {
1767                 HPSB_ERR ("NodeMgr: out of memory in add host");
1768                 return;
1769         }
1770
1771         hi->host = host;
1772         init_completion(&hi->exited);
1773         sema_init(&hi->reset_sem, 0);
1774
1775         sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1776
1777         hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1778
1779         if (hi->pid < 0) {
1780                 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1781                           hi->daemon_name, host->driver->name);
1782                 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1783                 return;
1784         }
1785
1786         return;
1787 }
1788
1789 static void nodemgr_host_reset(struct hpsb_host *host)
1790 {
1791         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1792
1793         if (hi != NULL) {
1794                 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1795                 up(&hi->reset_sem);
1796         } else
1797                 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1798
1799         return;
1800 }
1801
1802 static void nodemgr_remove_host(struct hpsb_host *host)
1803 {
1804         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1805
1806         if (hi) {
1807                 if (hi->pid >= 0) {
1808                         hi->kill_me = 1;
1809                         mb();
1810                         up(&hi->reset_sem);
1811                         wait_for_completion(&hi->exited);
1812                         nodemgr_remove_host_dev(&host->device);
1813                 }
1814         } else
1815                 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1816                          host->driver->name);
1817
1818         return;
1819 }
1820
1821 static struct hpsb_highlevel nodemgr_highlevel = {
1822         .name =         "Node manager",
1823         .add_host =     nodemgr_add_host,
1824         .host_reset =   nodemgr_host_reset,
1825         .remove_host =  nodemgr_remove_host,
1826 };
1827
1828 int init_ieee1394_nodemgr(void)
1829 {
1830         int ret;
1831
1832         ret = class_register(&nodemgr_ne_class);
1833         if (ret < 0)
1834                 return ret;
1835
1836         ret = class_register(&nodemgr_ud_class);
1837         if (ret < 0) {
1838                 class_unregister(&nodemgr_ne_class);
1839                 return ret;
1840         }
1841
1842         hpsb_register_highlevel(&nodemgr_highlevel);
1843
1844         return 0;
1845 }
1846
1847 void cleanup_ieee1394_nodemgr(void)
1848 {
1849         hpsb_unregister_highlevel(&nodemgr_highlevel);
1850
1851         class_unregister(&nodemgr_ud_class);
1852         class_unregister(&nodemgr_ne_class);
1853 }