err.no 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/moduleparam.h>
  18 #include <linux/freezer.h>
  19 #include <asm/atomic.h>
  20
  21 #include "csr.h"
  22 #include "highlevel.h"
  23 #include "hosts.h"
  24 #include "ieee1394.h"
  25 #include "ieee1394_core.h"
  26 #include "ieee1394_hotplug.h"
  27 #include "ieee1394_types.h"
  28 #include "ieee1394_transactions.h"
  29 #include "nodemgr.h"
  30
  31 static int ignore_drivers;
  32 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
  33 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
  34
  35 struct nodemgr_csr_info {
  36         struct hpsb_host *host;
  37         nodeid_t nodeid;
  38         unsigned int generation;
  39         unsigned int speed_unverified:1;
  40 };
  41
  42
  43 static char *nodemgr_find_oui_name(int oui)
  44 {
  45 #ifdef CONFIG_IEEE1394_OUI_DB
  46         extern struct oui_list_struct {
  47                 int oui;
  48                 char *name;
  49         } oui_list[];
  50         int i;
  51
  52         for (i = 0; oui_list[i].name; i++)
  53                 if (oui_list[i].oui == oui)
  54                         return oui_list[i].name;
  55 #endif
  56         return NULL;
  57 }
  58
  59 /*
  60  * Correct the speed map entry.  This is necessary
  61  *  - for nodes with link speed < phy speed,
  62  *  - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
  63  * A possible speed is determined by trial and error, using quadlet reads.
  64  */
  65 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
  66                                quadlet_t *buffer)
  67 {
  68         quadlet_t q;
  69         u8 i, *speed, old_speed, good_speed;
  70         int ret;
  71
  72         speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
  73         old_speed = *speed;
  74         good_speed = IEEE1394_SPEED_MAX + 1;
  75
  76         /* Try every speed from S100 to old_speed.
  77          * If we did it the other way around, a too low speed could be caught
  78          * if the retry succeeded for some other reason, e.g. because the link
  79          * just finished its initialization. */
  80         for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
  81                 *speed = i;
  82                 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
  83                                 &q, sizeof(quadlet_t));
  84                 if (ret)
  85                         break;
  86                 *buffer = q;
  87                 good_speed = i;
  88         }
  89         if (good_speed <= IEEE1394_SPEED_MAX) {
  90                 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
  91                            NODE_BUS_ARGS(ci->host, ci->nodeid),
  92                            hpsb_speedto_str[good_speed]);
  93                 *speed = good_speed;
  94                 ci->speed_unverified = 0;
  95                 return 0;
  96         }
  97         *speed = old_speed;
  98         return ret;
  99 }
 100
 101 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
 102                             void *buffer, void *__ci)
 103 {
 104         struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
 105         int i, ret;
 106
 107         for (i = 1; ; i++) {
 108                 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
 109                                 buffer, length);
 110                 if (!ret) {
 111                         ci->speed_unverified = 0;
 112                         break;
 113                 }
 114                 /* Give up after 3rd failure. */
 115                 if (i == 3)
 116                         break;
 117
 118                 /* The ieee1394_core guessed the node's speed capability from
 119                  * the self ID.  Check whether a lower speed works. */
 120                 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
 121                         ret = nodemgr_check_speed(ci, addr, buffer);
 122                         if (!ret)
 123                                 break;
 124                 }
 125                 if (msleep_interruptible(334))
 126                         return -EINTR;
 127         }
 128         return ret;
 129 }
 130
 131 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
 132 {
 133         return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
 134 }
 135
 136 static struct csr1212_bus_ops nodemgr_csr_ops = {
 137         .bus_read =     nodemgr_bus_read,
 138         .get_max_rom =  nodemgr_get_max_rom
 139 };
 140
 141
 142 /*
 143  * Basically what we do here is start off retrieving the bus_info block.
 144  * From there will fill in some info about the node, verify it is of IEEE
 145  * 1394 type, and that the crc checks out ok. After that we start off with
 146  * the root directory, and subdirectories. To do this, we retrieve the
 147  * quadlet header for a directory, find out the length, and retrieve the
 148  * complete directory entry (be it a leaf or a directory). We then process
 149  * it and add the info to our structure for that particular node.
 150  *
 151  * We verify CRC's along the way for each directory/block/leaf. The entire
 152  * node structure is generic, and simply stores the information in a way
 153  * that's easy to parse by the protocol interface.
 154  */
 155
 156 /*
 157  * The nodemgr relies heavily on the Driver Model for device callbacks and
 158  * driver/device mappings. The old nodemgr used to handle all this itself,
 159  * but now we are much simpler because of the LDM.
 160  */
 161
 162 static DEFINE_MUTEX(nodemgr_serialize);
 163
 164 struct host_info {
 165         struct hpsb_host *host;
 166         struct list_head list;
 167         struct task_struct *thread;
 168 };
 169
 170 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
 171 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
 172                           char *buffer, int buffer_size);
 173 static void nodemgr_resume_ne(struct node_entry *ne);
 174 static void nodemgr_remove_ne(struct node_entry *ne);
 175 static struct node_entry *find_entry_by_guid(u64 guid);
 176
 177 struct bus_type ieee1394_bus_type = {
 178         .name           = "ieee1394",
 179         .match          = nodemgr_bus_match,
 180 };
 181
 182 static void host_cls_release(struct class_device *class_dev)
 183 {
 184         put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
 185 }
 186
 187 struct class hpsb_host_class = {
 188         .name           = "ieee1394_host",
 189         .release        = host_cls_release,
 190 };
 191
 192 static void ne_cls_release(struct class_device *class_dev)
 193 {
 194         put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
 195 }
 196
 197 static struct class nodemgr_ne_class = {
 198         .name           = "ieee1394_node",
 199         .release        = ne_cls_release,
 200 };
 201
 202 static void ud_cls_release(struct class_device *class_dev)
 203 {
 204         put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
 205 }
 206
 207 /* The name here is only so that unit directory hotplug works with old
 208  * style hotplug, which only ever did unit directories anyway. */
 209 static struct class nodemgr_ud_class = {
 210         .name           = "ieee1394",
 211         .release        = ud_cls_release,
 212         .uevent         = nodemgr_uevent,
 213 };
 214
 215 static struct hpsb_highlevel nodemgr_highlevel;
 216
 217
 218 static void nodemgr_release_ud(struct device *dev)
 219 {
 220         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 221
 222         if (ud->vendor_name_kv)
 223                 csr1212_release_keyval(ud->vendor_name_kv);
 224         if (ud->model_name_kv)
 225                 csr1212_release_keyval(ud->model_name_kv);
 226
 227         kfree(ud);
 228 }
 229
 230 static void nodemgr_release_ne(struct device *dev)
 231 {
 232         struct node_entry *ne = container_of(dev, struct node_entry, device);
 233
 234         if (ne->vendor_name_kv)
 235                 csr1212_release_keyval(ne->vendor_name_kv);
 236
 237         kfree(ne);
 238 }
 239
 240
 241 static void nodemgr_release_host(struct device *dev)
 242 {
 243         struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
 244
 245         csr1212_destroy_csr(host->csr.rom);
 246
 247         kfree(host);
 248 }
 249
 250 static int nodemgr_ud_platform_data;
 251
 252 static struct device nodemgr_dev_template_ud = {
 253         .bus            = &ieee1394_bus_type,
 254         .release        = nodemgr_release_ud,
 255         .platform_data  = &nodemgr_ud_platform_data,
 256 };
 257
 258 static struct device nodemgr_dev_template_ne = {
 259         .bus            = &ieee1394_bus_type,
 260         .release        = nodemgr_release_ne,
 261 };
 262
 263 struct device nodemgr_dev_template_host = {
 264         .bus            = &ieee1394_bus_type,
 265         .release        = nodemgr_release_host,
 266 };
 267
 268
 269 #define fw_attr(class, class_type, field, type, format_string)          \
 270 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
 271 {                                                                       \
 272         class_type *class;                                              \
 273         class = container_of(dev, class_type, device);                  \
 274         return sprintf(buf, format_string, (type)class->field);         \
 275 }                                                                       \
 276 static struct device_attribute dev_attr_##class##_##field = {           \
 277         .attr = {.name = __stringify(field), .mode = S_IRUGO },         \
 278         .show   = fw_show_##class##_##field,                            \
 279 };
 280
 281 #define fw_attr_td(class, class_type, td_kv)                            \
 282 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
 283 {                                                                       \
 284         int len;                                                        \
 285         class_type *class = container_of(dev, class_type, device);      \
 286         len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t);   \
 287         memcpy(buf,                                                     \
 288                CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv),      \
 289                len);                                                    \
 290         while ((buf + len - 1) == '\0')                                 \
 291                 len--;                                                  \
 292         buf[len++] = '\n';                                              \
 293         buf[len] = '\0';                                                \
 294         return len;                                                     \
 295 }                                                                       \
 296 static struct device_attribute dev_attr_##class##_##td_kv = {           \
 297         .attr = {.name = __stringify(td_kv), .mode = S_IRUGO },         \
 298         .show   = fw_show_##class##_##td_kv,                            \
 299 };
 300
 301
 302 #define fw_drv_attr(field, type, format_string)                 \
 303 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
 304 {                                                               \
 305         struct hpsb_protocol_driver *driver;                    \
 306         driver = container_of(drv, struct hpsb_protocol_driver, driver); \
 307         return sprintf(buf, format_string, (type)driver->field);\
 308 }                                                               \
 309 static struct driver_attribute driver_attr_drv_##field = {      \
 310         .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
 311         .show   = fw_drv_show_##field,                          \
 312 };
 313
 314
 315 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
 316 {
 317         struct node_entry *ne = container_of(dev, struct node_entry, device);
 318
 319         return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
 320                        "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
 321                        ne->busopt.irmc,
 322                        ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
 323                        ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
 324                        ne->busopt.max_rec,
 325                        ne->busopt.max_rom,
 326                        ne->busopt.cyc_clk_acc);
 327 }
 328 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
 329
 330
 331 #ifdef HPSB_DEBUG_TLABELS
 332 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
 333                                        struct device_attribute *attr, char *buf)
 334 {
 335         struct node_entry *ne = container_of(dev, struct node_entry, device);
 336         unsigned long flags;
 337         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 338         int tf;
 339
 340         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 341         tf = 64 - bitmap_weight(tp, 64);
 342         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 343
 344         return sprintf(buf, "%d\n", tf);
 345 }
 346 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
 347
 348
 349 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
 350                                        struct device_attribute *attr, char *buf)
 351 {
 352         struct node_entry *ne = container_of(dev, struct node_entry, device);
 353         unsigned long flags;
 354         unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
 355         u64 tm;
 356
 357         spin_lock_irqsave(&hpsb_tlabel_lock, flags);
 358 #if (BITS_PER_LONG <= 32)
 359         tm = ((u64)tp[0] << 32) + tp[1];
 360 #else
 361         tm = tp[0];
 362 #endif
 363         spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
 364
 365         return sprintf(buf, "0x%016llx\n", tm);
 366 }
 367 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
 368 #endif /* HPSB_DEBUG_TLABELS */
 369
 370
 371 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 372 {
 373         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 374         int state = simple_strtoul(buf, NULL, 10);
 375
 376         if (state == 1) {
 377                 down_write(&dev->bus->subsys.rwsem);
 378                 device_release_driver(dev);
 379                 ud->ignore_driver = 1;
 380                 up_write(&dev->bus->subsys.rwsem);
 381         } else if (!state)
 382                 ud->ignore_driver = 0;
 383
 384         return count;
 385 }
 386 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
 387 {
 388         struct unit_directory *ud = container_of(dev, struct unit_directory, device);
 389
 390         return sprintf(buf, "%d\n", ud->ignore_driver);
 391 }
 392 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
 393
 394
 395 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
 396 {
 397         struct node_entry *ne;
 398         u64 guid = (u64)simple_strtoull(buf, NULL, 16);
 399
 400         ne = find_entry_by_guid(guid);
 401
 402         if (ne == NULL || !ne->in_limbo)
 403                 return -EINVAL;
 404
 405         nodemgr_remove_ne(ne);
 406
 407         return count;
 408 }
 409 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
 410 {
 411         return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
 412 }
 413 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
 414
 415
 416 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
 417                              size_t count)
 418 {
 419         int error = 0;
 420
 421         if (simple_strtoul(buf, NULL, 10) == 1)
 422                 error = bus_rescan_devices(&ieee1394_bus_type);
 423         return error ? error : count;
 424 }
 425 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
 426 {
 427         return sprintf(buf, "You can force a rescan of the bus for "
 428                         "drivers by writing a 1 to this file\n");
 429 }
 430 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
 431
 432
 433 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
 434 {
 435         int state = simple_strtoul(buf, NULL, 10);
 436
 437         if (state == 1)
 438                 ignore_drivers = 1;
 439         else if (!state)
 440                 ignore_drivers = 0;
 441
 442         return count;
 443 }
 444 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
 445 {
 446         return sprintf(buf, "%d\n", ignore_drivers);
 447 }
 448 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
 449
 450
 451 struct bus_attribute *const fw_bus_attrs[] = {
 452         &bus_attr_destroy_node,
 453         &bus_attr_rescan,
 454         &bus_attr_ignore_drivers,
 455         NULL
 456 };
 457
 458
 459 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
 460 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
 461
 462 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
 463 fw_attr_td(ne, struct node_entry, vendor_name_kv)
 464 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
 465
 466 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
 467 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
 468 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
 469 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
 470
 471 static struct device_attribute *const fw_ne_attrs[] = {
 472         &dev_attr_ne_guid,
 473         &dev_attr_ne_guid_vendor_id,
 474         &dev_attr_ne_capabilities,
 475         &dev_attr_ne_vendor_id,
 476         &dev_attr_ne_nodeid,
 477         &dev_attr_bus_options,
 478 #ifdef HPSB_DEBUG_TLABELS
 479         &dev_attr_tlabels_free,
 480         &dev_attr_tlabels_mask,
 481 #endif
 482 };
 483
 484
 485
 486 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
 487 fw_attr(ud, struct unit_directory, length, int, "%d\n")
 488 /* These are all dependent on the value being provided */
 489 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
 490 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
 491 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
 492 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
 493 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
 494 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
 495 fw_attr_td(ud, struct unit_directory, model_name_kv)
 496
 497 static struct device_attribute *const fw_ud_attrs[] = {
 498         &dev_attr_ud_address,
 499         &dev_attr_ud_length,
 500         &dev_attr_ignore_driver,
 501 };
 502
 503
 504 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
 505 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
 506 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
 507 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
 508 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
 509 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
 510 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
 511 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
 512
 513 static struct device_attribute *const fw_host_attrs[] = {
 514         &dev_attr_host_node_count,
 515         &dev_attr_host_selfid_count,
 516         &dev_attr_host_nodes_active,
 517         &dev_attr_host_in_bus_reset,
 518         &dev_attr_host_is_root,
 519         &dev_attr_host_is_cycmst,
 520         &dev_attr_host_is_irm,
 521         &dev_attr_host_is_busmgr,
 522 };
 523
 524
 525 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
 526 {
 527         struct hpsb_protocol_driver *driver;
 528         struct ieee1394_device_id *id;
 529         int length = 0;
 530         char *scratch = buf;
 531
 532         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 533
 534         for (id = driver->id_table; id->match_flags != 0; id++) {
 535                 int need_coma = 0;
 536
 537                 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
 538                         length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
 539                         scratch = buf + length;
 540                         need_coma++;
 541                 }
 542
 543                 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
 544                         length += sprintf(scratch, "%smodel_id=0x%06x",
 545                                           need_coma++ ? "," : "",
 546                                           id->model_id);
 547                         scratch = buf + length;
 548                 }
 549
 550                 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
 551                         length += sprintf(scratch, "%sspecifier_id=0x%06x",
 552                                           need_coma++ ? "," : "",
 553                                           id->specifier_id);
 554                         scratch = buf + length;
 555                 }
 556
 557                 if (id->match_flags & IEEE1394_MATCH_VERSION) {
 558                         length += sprintf(scratch, "%sversion=0x%06x",
 559                                           need_coma++ ? "," : "",
 560                                           id->version);
 561                         scratch = buf + length;
 562                 }
 563
 564                 if (need_coma) {
 565                         *scratch++ = '\n';
 566                         length++;
 567                 }
 568         }
 569
 570         return length;
 571 }
 572 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
 573
 574
 575 fw_drv_attr(name, const char *, "%s\n")
 576
 577 static struct driver_attribute *const fw_drv_attrs[] = {
 578         &driver_attr_drv_name,
 579         &driver_attr_device_ids,
 580 };
 581
 582
 583 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
 584 {
 585         struct device_driver *drv = &driver->driver;
 586         int i;
 587
 588         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 589                 if (driver_create_file(drv, fw_drv_attrs[i]))
 590                         goto fail;
 591         return;
 592 fail:
 593         HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
 594 }
 595
 596
 597 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
 598 {
 599         struct device_driver *drv = &driver->driver;
 600         int i;
 601
 602         for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
 603                 driver_remove_file(drv, fw_drv_attrs[i]);
 604 }
 605
 606
 607 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
 608 {
 609         struct device *dev = &ne->device;
 610         int i;
 611
 612         for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
 613                 if (device_create_file(dev, fw_ne_attrs[i]))
 614                         goto fail;
 615         return;
 616 fail:
 617         HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
 618                  (unsigned long long)ne->guid);
 619 }
 620
 621
 622 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
 623 {
 624         struct device *dev = &host->device;
 625         int i;
 626
 627         for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
 628                 if (device_create_file(dev, fw_host_attrs[i]))
 629                         goto fail;
 630         return;
 631 fail:
 632         HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
 633 }
 634
 635
 636 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
 637                                                nodeid_t nodeid);
 638
 639 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
 640 {
 641         struct device *dev = &host->device;
 642         struct node_entry *ne;
 643
 644         sysfs_remove_link(&dev->kobj, "irm_id");
 645         sysfs_remove_link(&dev->kobj, "busmgr_id");
 646         sysfs_remove_link(&dev->kobj, "host_id");
 647
 648         if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
 649             sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
 650                 goto fail;
 651         if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
 652             sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
 653                 goto fail;
 654         if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
 655             sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
 656                 goto fail;
 657         return;
 658 fail:
 659         HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
 660 }
 661
 662 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
 663 {
 664         struct device *dev = &ud->device;
 665         int i;
 666
 667         for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
 668                 if (device_create_file(dev, fw_ud_attrs[i]))
 669                         goto fail;
 670         if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
 671                 if (device_create_file(dev, &dev_attr_ud_specifier_id))
 672                         goto fail;
 673         if (ud->flags & UNIT_DIRECTORY_VERSION)
 674                 if (device_create_file(dev, &dev_attr_ud_version))
 675                         goto fail;
 676         if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
 677                 if (device_create_file(dev, &dev_attr_ud_vendor_id))
 678                         goto fail;
 679                 if (ud->vendor_name_kv &&
 680                     device_create_file(dev, &dev_attr_ud_vendor_name_kv))
 681                         goto fail;
 682         }
 683         if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
 684                 if (device_create_file(dev, &dev_attr_ud_model_id))
 685                         goto fail;
 686                 if (ud->model_name_kv &&
 687                     device_create_file(dev, &dev_attr_ud_model_name_kv))
 688                         goto fail;
 689         }
 690         return;
 691 fail:
 692         HPSB_ERR("Failed to add sysfs attributes for unit %s",
 693                  ud->device.bus_id);
 694 }
 695
 696
 697 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
 698 {
 699         struct hpsb_protocol_driver *driver;
 700         struct unit_directory *ud;
 701         struct ieee1394_device_id *id;
 702
 703         /* We only match unit directories */
 704         if (dev->platform_data != &nodemgr_ud_platform_data)
 705                 return 0;
 706
 707         ud = container_of(dev, struct unit_directory, device);
 708         driver = container_of(drv, struct hpsb_protocol_driver, driver);
 709
 710         if (ud->ne->in_limbo || ud->ignore_driver)
 711                 return 0;
 712
 713         for (id = driver->id_table; id->match_flags != 0; id++) {
 714                 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
 715                     id->vendor_id != ud->vendor_id)
 716                         continue;
 717
 718                 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
 719                     id->model_id != ud->model_id)
 720                         continue;
 721
 722                 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
 723                     id->specifier_id != ud->specifier_id)
 724                         continue;
 725
 726                 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
 727                     id->version != ud->version)
 728                         continue;
 729
 730                 return 1;
 731         }
 732
 733         return 0;
 734 }
 735
 736
 737 static void nodemgr_remove_uds(struct node_entry *ne)
 738 {
 739         struct class_device *cdev, *next;
 740         struct unit_directory *ud;
 741
 742         list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
 743                 ud = container_of(cdev, struct unit_directory, class_dev);
 744
 745                 if (ud->ne != ne)
 746                         continue;
 747
 748                 class_device_unregister(&ud->class_dev);
 749                 device_unregister(&ud->device);
 750         }
 751 }
 752
 753
 754 static void nodemgr_remove_ne(struct node_entry *ne)
 755 {
 756         struct device *dev = &ne->device;
 757
 758         dev = get_device(&ne->device);
 759         if (!dev)
 760                 return;
 761
 762         HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 763                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
 764
 765         nodemgr_remove_uds(ne);
 766
 767         class_device_unregister(&ne->class_dev);
 768         device_unregister(dev);
 769
 770         put_device(dev);
 771 }
 772
 773 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
 774 {
 775         nodemgr_remove_ne(container_of(dev, struct node_entry, device));
 776         return 0;
 777 }
 778
 779 static void nodemgr_remove_host_dev(struct device *dev)
 780 {
 781         WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
 782         sysfs_remove_link(&dev->kobj, "irm_id");
 783         sysfs_remove_link(&dev->kobj, "busmgr_id");
 784         sysfs_remove_link(&dev->kobj, "host_id");
 785 }
 786
 787
 788 static void nodemgr_update_bus_options(struct node_entry *ne)
 789 {
 790 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
 791         static const u16 mr[] = { 4, 64, 1024, 0};
 792 #endif
 793         quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
 794
 795         ne->busopt.irmc         = (busoptions >> 31) & 1;
 796         ne->busopt.cmc          = (busoptions >> 30) & 1;
 797         ne->busopt.isc          = (busoptions >> 29) & 1;
 798         ne->busopt.bmc          = (busoptions >> 28) & 1;
 799         ne->busopt.pmc          = (busoptions >> 27) & 1;
 800         ne->busopt.cyc_clk_acc  = (busoptions >> 16) & 0xff;
 801         ne->busopt.max_rec      = 1 << (((busoptions >> 12) & 0xf) + 1);
 802         ne->busopt.max_rom      = (busoptions >> 8) & 0x3;
 803         ne->busopt.generation   = (busoptions >> 4) & 0xf;
 804         ne->busopt.lnkspd       = busoptions & 0x7;
 805
 806         HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
 807                      "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
 808                      busoptions, ne->busopt.irmc, ne->busopt.cmc,
 809                      ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
 810                      ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
 811                      mr[ne->busopt.max_rom],
 812                      ne->busopt.generation, ne->busopt.lnkspd);
 813 }
 814
 815
 816 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
 817                                               struct host_info *hi, nodeid_t nodeid,
 818                                               unsigned int generation)
 819 {
 820         struct hpsb_host *host = hi->host;
 821         struct node_entry *ne;
 822
 823         ne = kzalloc(sizeof(*ne), GFP_KERNEL);
 824         if (!ne)
 825                 goto fail_alloc;
 826
 827         ne->host = host;
 828         ne->nodeid = nodeid;
 829         ne->generation = generation;
 830         ne->needs_probe = 1;
 831
 832         ne->guid = guid;
 833         ne->guid_vendor_id = (guid >> 40) & 0xffffff;
 834         ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
 835         ne->csr = csr;
 836
 837         memcpy(&ne->device, &nodemgr_dev_template_ne,
 838                sizeof(ne->device));
 839         ne->device.parent = &host->device;
 840         snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
 841                  (unsigned long long)(ne->guid));
 842
 843         ne->class_dev.dev = &ne->device;
 844         ne->class_dev.class = &nodemgr_ne_class;
 845         snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
 846                  (unsigned long long)(ne->guid));
 847
 848         if (device_register(&ne->device))
 849                 goto fail_devreg;
 850         if (class_device_register(&ne->class_dev))
 851                 goto fail_classdevreg;
 852         get_device(&ne->device);
 853
 854         if (ne->guid_vendor_oui &&
 855             device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui))
 856                 goto fail_addoiu;
 857         nodemgr_create_ne_dev_files(ne);
 858
 859         nodemgr_update_bus_options(ne);
 860
 861         HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 862                    (host->node_id == nodeid) ? "Host" : "Node",
 863                    NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 864
 865         return ne;
 866
 867 fail_addoiu:
 868         put_device(&ne->device);
 869 fail_classdevreg:
 870         device_unregister(&ne->device);
 871 fail_devreg:
 872         kfree(ne);
 873 fail_alloc:
 874         HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
 875                  NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
 876
 877         return NULL;
 878 }
 879
 880
 881 static struct node_entry *find_entry_by_guid(u64 guid)
 882 {
 883         struct class *class = &nodemgr_ne_class;
 884         struct class_device *cdev;
 885         struct node_entry *ne, *ret_ne = NULL;
 886
 887         down_read(&class->subsys.rwsem);
 888         list_for_each_entry(cdev, &class->children, node) {
 889                 ne = container_of(cdev, struct node_entry, class_dev);
 890
 891                 if (ne->guid == guid) {
 892                         ret_ne = ne;
 893                         break;
 894                 }
 895         }
 896         up_read(&class->subsys.rwsem);
 897
 898         return ret_ne;
 899 }
 900
 901
 902 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
 903 {
 904         struct class *class = &nodemgr_ne_class;
 905         struct class_device *cdev;
 906         struct node_entry *ne, *ret_ne = NULL;
 907
 908         down_read(&class->subsys.rwsem);
 909         list_for_each_entry(cdev, &class->children, node) {
 910                 ne = container_of(cdev, struct node_entry, class_dev);
 911
 912                 if (ne->host == host && ne->nodeid == nodeid) {
 913                         ret_ne = ne;
 914                         break;
 915                 }
 916         }
 917         up_read(&class->subsys.rwsem);
 918
 919         return ret_ne;
 920 }
 921
 922
 923 static void nodemgr_register_device(struct node_entry *ne,
 924         struct unit_directory *ud, struct device *parent)
 925 {
 926         memcpy(&ud->device, &nodemgr_dev_template_ud,
 927                sizeof(ud->device));
 928
 929         ud->device.parent = parent;
 930
 931         snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
 932                  ne->device.bus_id, ud->id);
 933
 934         ud->class_dev.dev = &ud->device;
 935         ud->class_dev.class = &nodemgr_ud_class;
 936         snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
 937                  ne->device.bus_id, ud->id);
 938
 939         if (device_register(&ud->device))
 940                 goto fail_devreg;
 941         if (class_device_register(&ud->class_dev))
 942                 goto fail_classdevreg;
 943         get_device(&ud->device);
 944
 945         if (ud->vendor_oui &&
 946             device_create_file(&ud->device, &dev_attr_ud_vendor_oui))
 947                 goto fail_addoui;
 948         nodemgr_create_ud_dev_files(ud);
 949
 950         return;
 951
 952 fail_addoui:
 953         put_device(&ud->device);
 954 fail_classdevreg:
 955         device_unregister(&ud->device);
 956 fail_devreg:
 957         HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
 958 }
 959
 960
 961 /* This implementation currently only scans the config rom and its
 962  * immediate unit directories looking for software_id and
 963  * software_version entries, in order to get driver autoloading working. */
 964 static struct unit_directory *nodemgr_process_unit_directory
 965         (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
 966          unsigned int *id, struct unit_directory *parent)
 967 {
 968         struct unit_directory *ud;
 969         struct unit_directory *ud_child = NULL;
 970         struct csr1212_dentry *dentry;
 971         struct csr1212_keyval *kv;
 972         u8 last_key_id = 0;
 973
 974         ud = kzalloc(sizeof(*ud), GFP_KERNEL);
 975         if (!ud)
 976                 goto unit_directory_error;
 977
 978         ud->ne = ne;
 979         ud->ignore_driver = ignore_drivers;
 980         ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
 981         ud->ud_kv = ud_kv;
 982         ud->id = (*id)++;
 983
 984         csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
 985                 switch (kv->key.id) {
 986                 case CSR1212_KV_ID_VENDOR:
 987                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
 988                                 ud->vendor_id = kv->value.immediate;
 989                                 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
 990
 991                                 if (ud->vendor_id)
 992                                         ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
 993                         }
 994                         break;
 995
 996                 case CSR1212_KV_ID_MODEL:
 997                         ud->model_id = kv->value.immediate;
 998                         ud->flags |= UNIT_DIRECTORY_MODEL_ID;
 999                         break;
1000
1001                 case CSR1212_KV_ID_SPECIFIER_ID:
1002                         ud->specifier_id = kv->value.immediate;
1003                         ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1004                         break;
1005
1006                 case CSR1212_KV_ID_VERSION:
1007                         ud->version = kv->value.immediate;
1008                         ud->flags |= UNIT_DIRECTORY_VERSION;
1009                         break;
1010
1011                 case CSR1212_KV_ID_DESCRIPTOR:
1012                         if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1013                             CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1014                             CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1015                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1016                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1017                             CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1018                                 switch (last_key_id) {
1019                                 case CSR1212_KV_ID_VENDOR:
1020                                         ud->vendor_name_kv = kv;
1021                                         csr1212_keep_keyval(kv);
1022                                         break;
1023
1024                                 case CSR1212_KV_ID_MODEL:
1025                                         ud->model_name_kv = kv;
1026                                         csr1212_keep_keyval(kv);
1027                                         break;
1028
1029                                 }
1030                         } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1031                         break;
1032
1033                 case CSR1212_KV_ID_DEPENDENT_INFO:
1034                         /* Logical Unit Number */
1035                         if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1036                                 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1037                                         ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
1038                                         if (!ud_child)
1039                                                 goto unit_directory_error;
1040                                         memcpy(ud_child, ud, sizeof(*ud_child));
1041                                         nodemgr_register_device(ne, ud_child, &ne->device);
1042                                         ud_child = NULL;
1043
1044                                         ud->id = (*id)++;
1045                                 }
1046                                 ud->lun = kv->value.immediate;
1047                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1048
1049                         /* Logical Unit Directory */
1050                         } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1051                                 /* This should really be done in SBP2 as this is
1052                                  * doing SBP2 specific parsing.
1053                                  */
1054
1055                                 /* first register the parent unit */
1056                                 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1057                                 if (ud->device.bus != &ieee1394_bus_type)
1058                                         nodemgr_register_device(ne, ud, &ne->device);
1059
1060                                 /* process the child unit */
1061                                 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1062
1063                                 if (ud_child == NULL)
1064                                         break;
1065
1066                                 /* inherit unspecified values, the driver core picks it up */
1067                                 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1068                                     !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1069                                 {
1070                                         ud_child->flags |=  UNIT_DIRECTORY_MODEL_ID;
1071                                         ud_child->model_id = ud->model_id;
1072                                 }
1073                                 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1074                                     !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1075                                 {
1076                                         ud_child->flags |=  UNIT_DIRECTORY_SPECIFIER_ID;
1077                                         ud_child->specifier_id = ud->specifier_id;
1078                                 }
1079                                 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1080                                     !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1081                                 {
1082                                         ud_child->flags |=  UNIT_DIRECTORY_VERSION;
1083                                         ud_child->version = ud->version;
1084                                 }
1085
1086                                 /* register the child unit */
1087                                 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1088                                 nodemgr_register_device(ne, ud_child, &ud->device);
1089                         }
1090
1091                         break;
1092
1093                 default:
1094                         break;
1095                 }
1096                 last_key_id = kv->key.id;
1097         }
1098
1099         /* do not process child units here and only if not already registered */
1100         if (!parent && ud->device.bus != &ieee1394_bus_type)
1101                 nodemgr_register_device(ne, ud, &ne->device);
1102
1103         return ud;
1104
1105 unit_directory_error:
1106         kfree(ud);
1107         return NULL;
1108 }
1109
1110
1111 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1112 {
1113         unsigned int ud_id = 0;
1114         struct csr1212_dentry *dentry;
1115         struct csr1212_keyval *kv;
1116         u8 last_key_id = 0;
1117
1118         ne->needs_probe = 0;
1119
1120         csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1121                 switch (kv->key.id) {
1122                 case CSR1212_KV_ID_VENDOR:
1123                         ne->vendor_id = kv->value.immediate;
1124
1125                         if (ne->vendor_id)
1126                                 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1127                         break;
1128
1129                 case CSR1212_KV_ID_NODE_CAPABILITIES:
1130                         ne->capabilities = kv->value.immediate;
1131                         break;
1132
1133                 case CSR1212_KV_ID_UNIT:
1134                         nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1135                         break;
1136
1137                 case CSR1212_KV_ID_DESCRIPTOR:
1138                         if (last_key_id == CSR1212_KV_ID_VENDOR) {
1139                                 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1140                                     CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1141                                     CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1142                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1143                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1144                                     CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1145                                         ne->vendor_name_kv = kv;
1146                                         csr1212_keep_keyval(kv);
1147                                 }
1148                         }
1149                         break;
1150                 }
1151                 last_key_id = kv->key.id;
1152         }
1153
1154         if (ne->vendor_oui &&
1155             device_create_file(&ne->device, &dev_attr_ne_vendor_oui))
1156                 goto fail;
1157         if (ne->vendor_name_kv &&
1158             device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1159                 goto fail;
1160         return;
1161 fail:
1162         HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1163                  (unsigned long long)ne->guid);
1164 }
1165
1166 #ifdef CONFIG_HOTPLUG
1167
1168 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1169                           char *buffer, int buffer_size)
1170 {
1171         struct unit_directory *ud;
1172         int i = 0;
1173         int length = 0;
1174         /* ieee1394:venNmoNspNverN */
1175         char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1176
1177         if (!cdev)
1178                 return -ENODEV;
1179
1180         ud = container_of(cdev, struct unit_directory, class_dev);
1181
1182         if (ud->ne->in_limbo || ud->ignore_driver)
1183                 return -ENODEV;
1184
1185 #define PUT_ENVP(fmt,val)                                       \
1186 do {                                                            \
1187         int printed;                                            \
1188         envp[i++] = buffer;                                     \
1189         printed = snprintf(buffer, buffer_size - length,        \
1190                            fmt, val);                           \
1191         if ((buffer_size - (length+printed) <= 0) || (i >= num_envp))   \
1192                 return -ENOMEM;                                 \
1193         length += printed+1;                                    \
1194         buffer += printed+1;                                    \
1195 } while (0)
1196
1197         PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1198         PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1199         PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1200         PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1201         PUT_ENVP("VERSION=%06x", ud->version);
1202         snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1203                         ud->vendor_id,
1204                         ud->model_id,
1205                         ud->specifier_id,
1206                         ud->version);
1207         PUT_ENVP("MODALIAS=%s", buf);
1208
1209 #undef PUT_ENVP
1210
1211         envp[i] = NULL;
1212
1213         return 0;
1214 }
1215
1216 #else
1217
1218 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1219                           char *buffer, int buffer_size)
1220 {
1221         return -ENODEV;
1222 }
1223
1224 #endif /* CONFIG_HOTPLUG */
1225
1226
1227 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1228 {
1229         int ret;
1230
1231         /* This will cause a probe for devices */
1232         ret = driver_register(&driver->driver);
1233         if (!ret)
1234                 nodemgr_create_drv_files(driver);
1235
1236         return 0;
1237 }
1238
1239 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1240 {
1241         nodemgr_remove_drv_files(driver);
1242         /* This will subsequently disconnect all devices that our driver
1243          * is attached to. */
1244         driver_unregister(&driver->driver);
1245 }
1246
1247
1248 /*
1249  * This function updates nodes that were present on the bus before the
1250  * reset and still are after the reset.  The nodeid and the config rom
1251  * may have changed, and the drivers managing this device must be
1252  * informed that this device just went through a bus reset, to allow
1253  * the to take whatever actions required.
1254  */
1255 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1256                                 struct host_info *hi, nodeid_t nodeid,
1257                                 unsigned int generation)
1258 {
1259         if (ne->nodeid != nodeid) {
1260                 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1261                            NODE_BUS_ARGS(ne->host, ne->nodeid),
1262                            NODE_BUS_ARGS(ne->host, nodeid));
1263                 ne->nodeid = nodeid;
1264         }
1265
1266         if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1267                 kfree(ne->csr->private);
1268                 csr1212_destroy_csr(ne->csr);
1269                 ne->csr = csr;
1270
1271                 /* If the node's configrom generation has changed, we
1272                  * unregister all the unit directories. */
1273                 nodemgr_remove_uds(ne);
1274
1275                 nodemgr_update_bus_options(ne);
1276
1277                 /* Mark the node as new, so it gets re-probed */
1278                 ne->needs_probe = 1;
1279         } else {
1280                 /* old cache is valid, so update its generation */
1281                 struct nodemgr_csr_info *ci = ne->csr->private;
1282                 ci->generation = generation;
1283                 /* free the partially filled now unneeded new cache */
1284                 kfree(csr->private);
1285                 csr1212_destroy_csr(csr);
1286         }
1287
1288         if (ne->in_limbo)
1289                 nodemgr_resume_ne(ne);
1290
1291         /* Mark the node current */
1292         ne->generation = generation;
1293 }
1294
1295
1296
1297 static void nodemgr_node_scan_one(struct host_info *hi,
1298                                   nodeid_t nodeid, int generation)
1299 {
1300         struct hpsb_host *host = hi->host;
1301         struct node_entry *ne;
1302         octlet_t guid;
1303         struct csr1212_csr *csr;
1304         struct nodemgr_csr_info *ci;
1305         u8 *speed;
1306
1307         ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1308         if (!ci)
1309                 return;
1310
1311         ci->host = host;
1312         ci->nodeid = nodeid;
1313         ci->generation = generation;
1314
1315         /* Prepare for speed probe which occurs when reading the ROM */
1316         speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1317         if (*speed > host->csr.lnk_spd)
1318                 *speed = host->csr.lnk_spd;
1319         ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1320
1321         /* We need to detect when the ConfigROM's generation has changed,
1322          * so we only update the node's info when it needs to be.  */
1323
1324         csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1325         if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1326                 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1327                          NODE_BUS_ARGS(host, nodeid));
1328                 if (csr)
1329                         csr1212_destroy_csr(csr);
1330                 kfree(ci);
1331                 return;
1332         }
1333
1334         if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1335                 /* This isn't a 1394 device, but we let it slide. There
1336                  * was a report of a device with broken firmware which
1337                  * reported '2394' instead of '1394', which is obviously a
1338                  * mistake. One would hope that a non-1394 device never
1339                  * gets connected to Firewire bus. If someone does, we
1340                  * shouldn't be held responsible, so we'll allow it with a
1341                  * warning.  */
1342                 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1343                           NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1344         }
1345
1346         guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1347         ne = find_entry_by_guid(guid);
1348
1349         if (ne && ne->host != host && ne->in_limbo) {
1350                 /* Must have moved this device from one host to another */
1351                 nodemgr_remove_ne(ne);
1352                 ne = NULL;
1353         }
1354
1355         if (!ne)
1356                 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1357         else
1358                 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1359 }
1360
1361
1362 static void nodemgr_node_scan(struct host_info *hi, int generation)
1363 {
1364         int count;
1365         struct hpsb_host *host = hi->host;
1366         struct selfid *sid = (struct selfid *)host->topology_map;
1367         nodeid_t nodeid = LOCAL_BUS;
1368
1369         /* Scan each node on the bus */
1370         for (count = host->selfid_count; count; count--, sid++) {
1371                 if (sid->extended)
1372                         continue;
1373
1374                 if (!sid->link_active) {
1375                         nodeid++;
1376                         continue;
1377                 }
1378                 nodemgr_node_scan_one(hi, nodeid++, generation);
1379         }
1380 }
1381
1382
1383 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1384 static void nodemgr_suspend_ne(struct node_entry *ne)
1385 {
1386         struct class_device *cdev;
1387         struct unit_directory *ud;
1388
1389         HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1390                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1391
1392         ne->in_limbo = 1;
1393         WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1394
1395         down_write(&ne->device.bus->subsys.rwsem);
1396         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1397                 ud = container_of(cdev, struct unit_directory, class_dev);
1398
1399                 if (ud->ne != ne)
1400                         continue;
1401
1402                 if (ud->device.driver &&
1403                     (!ud->device.driver->suspend ||
1404                       ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1405                         device_release_driver(&ud->device);
1406         }
1407         up_write(&ne->device.bus->subsys.rwsem);
1408 }
1409
1410
1411 static void nodemgr_resume_ne(struct node_entry *ne)
1412 {
1413         struct class_device *cdev;
1414         struct unit_directory *ud;
1415
1416         ne->in_limbo = 0;
1417         device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1418
1419         down_read(&nodemgr_ud_class.subsys.rwsem);
1420         down_read(&ne->device.bus->subsys.rwsem);
1421         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1422                 ud = container_of(cdev, struct unit_directory, class_dev);
1423
1424                 if (ud->ne != ne)
1425                         continue;
1426
1427                 if (ud->device.driver && ud->device.driver->resume)
1428                         ud->device.driver->resume(&ud->device);
1429         }
1430         up_read(&ne->device.bus->subsys.rwsem);
1431         up_read(&nodemgr_ud_class.subsys.rwsem);
1432
1433         HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "]  GUID[%016Lx]",
1434                    NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1435 }
1436
1437
1438 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1439 static void nodemgr_update_pdrv(struct node_entry *ne)
1440 {
1441         struct unit_directory *ud;
1442         struct hpsb_protocol_driver *pdrv;
1443         struct class_device *cdev;
1444
1445         list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1446                 ud = container_of(cdev, struct unit_directory, class_dev);
1447                 if (ud->ne != ne || !ud->device.driver)
1448                         continue;
1449
1450                 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1451
1452                 if (pdrv->update && pdrv->update(ud)) {
1453                         down_write(&ud->device.bus->subsys.rwsem);
1454                         device_release_driver(&ud->device);
1455                         up_write(&ud->device.bus->subsys.rwsem);
1456                 }
1457         }
1458 }
1459
1460
1461 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3.  This
1462  * seems like an optional service but in the end it is practically mandatory
1463  * as a consequence of these clauses.
1464  *
1465  * Note that we cannot do a broadcast write to all nodes at once because some
1466  * pre-1394a devices would hang. */
1467 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1468 {
1469         const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1470         quadlet_t bc_remote, bc_local;
1471         int ret;
1472
1473         if (!ne->host->is_irm || ne->generation != generation ||
1474             ne->nodeid == ne->host->node_id)
1475                 return;
1476
1477         bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1478
1479         /* Check if the register is implemented and 1394a compliant. */
1480         ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1481                         sizeof(bc_remote));
1482         if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1483             bc_remote != bc_local)
1484                 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1485 }
1486
1487
1488 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the
1489  * calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */
1490 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1491 {
1492         struct device *dev;
1493
1494         if (ne->host != hi->host || ne->in_limbo)
1495                 return;
1496
1497         dev = get_device(&ne->device);
1498         if (!dev)
1499                 return;
1500
1501         nodemgr_irm_write_bc(ne, generation);
1502
1503         /* If "needs_probe", then this is either a new or changed node we
1504          * rescan totally. If the generation matches for an existing node
1505          * (one that existed prior to the bus reset) we send update calls
1506          * down to the drivers. Otherwise, this is a dead node and we
1507          * suspend it. */
1508         if (ne->needs_probe)
1509                 nodemgr_process_root_directory(hi, ne);
1510         else if (ne->generation == generation)
1511                 nodemgr_update_pdrv(ne);
1512         else
1513                 nodemgr_suspend_ne(ne);
1514
1515         put_device(dev);
1516 }
1517
1518
1519 static void nodemgr_node_probe(struct host_info *hi, int generation)
1520 {
1521         struct hpsb_host *host = hi->host;
1522         struct class *class = &nodemgr_ne_class;
1523         struct class_device *cdev;
1524         struct node_entry *ne;
1525
1526         /* Do some processing of the nodes we've probed. This pulls them
1527          * into the sysfs layer if needed, and can result in processing of
1528          * unit-directories, or just updating the node and it's
1529          * unit-directories.
1530          *
1531          * Run updates before probes. Usually, updates are time-critical
1532          * while probes are time-consuming. (Well, those probes need some
1533          * improvement...) */
1534
1535         down_read(&class->subsys.rwsem);
1536         list_for_each_entry(cdev, &class->children, node) {
1537                 ne = container_of(cdev, struct node_entry, class_dev);
1538                 if (!ne->needs_probe)
1539                         nodemgr_probe_ne(hi, ne, generation);
1540         }
1541         list_for_each_entry(cdev, &class->children, node) {
1542                 ne = container_of(cdev, struct node_entry, class_dev);
1543                 if (ne->needs_probe)
1544                         nodemgr_probe_ne(hi, ne, generation);
1545         }
1546         up_read(&class->subsys.rwsem);
1547
1548
1549         /* If we had a bus reset while we were scanning the bus, it is
1550          * possible that we did not probe all nodes.  In that case, we
1551          * skip the clean up for now, since we could remove nodes that
1552          * were still on the bus.  Another bus scan is pending which will
1553          * do the clean up eventually.
1554          *
1555          * Now let's tell the bus to rescan our devices. This may seem
1556          * like overhead, but the driver-model core will only scan a
1557          * device for a driver when either the device is added, or when a
1558          * new driver is added. A bus reset is a good reason to rescan
1559          * devices that were there before.  For example, an sbp2 device
1560          * may become available for login, if the host that held it was
1561          * just removed.  */
1562
1563         if (generation == get_hpsb_generation(host))
1564                 WARN_ON(bus_rescan_devices(&ieee1394_bus_type));
1565
1566         return;
1567 }
1568
1569 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1570 {
1571         struct hpsb_packet *packet;
1572         int ret = 1;
1573
1574         packet = hpsb_make_phypacket(host,
1575                         EXTPHYPACKET_TYPE_RESUME |
1576                         NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1577         if (packet) {
1578                 packet->no_waiter = 1;
1579                 packet->generation = get_hpsb_generation(host);
1580                 ret = hpsb_send_packet(packet);
1581         }
1582         if (ret)
1583                 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1584                           host->id);
1585         return ret;
1586 }
1587
1588 /* Perform a few high-level IRM responsibilities. */
1589 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1590 {
1591         quadlet_t bc;
1592
1593         /* if irm_id == -1 then there is no IRM on this bus */
1594         if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1595                 return 1;
1596
1597         /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1598         host->csr.broadcast_channel |= 0x40000000;
1599
1600         /* If there is no bus manager then we should set the root node's
1601          * force_root bit to promote bus stability per the 1394
1602          * spec. (8.4.2.6) */
1603         if (host->busmgr_id == 0xffff && host->node_count > 1)
1604         {
1605                 u16 root_node = host->node_count - 1;
1606
1607                 /* get cycle master capability flag from root node */
1608                 if (host->is_cycmst ||
1609                     (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1610                                 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1611                                 &bc, sizeof(quadlet_t)) &&
1612                      be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1613                         hpsb_send_phy_config(host, root_node, -1);
1614                 else {
1615                         HPSB_DEBUG("The root node is not cycle master capable; "
1616                                    "selecting a new root node and resetting...");
1617
1618                         if (cycles >= 5) {
1619                                 /* Oh screw it! Just leave the bus as it is */
1620                                 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1621                                 return 1;
1622                         }
1623
1624                         hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1625                         hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1626
1627                         return 0;
1628                 }
1629         }
1630
1631         /* Some devices suspend their ports while being connected to an inactive
1632          * host adapter, i.e. if connected before the low-level driver is
1633          * loaded.  They become visible either when physically unplugged and
1634          * replugged, or when receiving a resume packet.  Send one once. */
1635         if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1636                 host->resume_packet_sent = 1;
1637
1638         return 1;
1639 }
1640
1641 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1642  * everything we can do, otherwise issue a bus reset and try to become the IRM
1643  * ourselves. */
1644 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1645 {
1646         quadlet_t bc;
1647         int status;
1648
1649         if (hpsb_disable_irm || host->is_irm)
1650                 return 1;
1651
1652         status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1653                            get_hpsb_generation(host),
1654                            (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1655                            &bc, sizeof(quadlet_t));
1656
1657         if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1658                 /* The current irm node does not have a valid BROADCAST_CHANNEL
1659                  * register and we do, so reset the bus with force_root set */
1660                 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1661
1662                 if (cycles >= 5) {
1663                         /* Oh screw it! Just leave the bus as it is */
1664                         HPSB_DEBUG("Stopping reset loop for IRM sanity");
1665                         return 1;
1666                 }
1667
1668                 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1669                 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1670
1671                 return 0;
1672         }
1673
1674         return 1;
1675 }
1676
1677 static int nodemgr_host_thread(void *__hi)
1678 {
1679         struct host_info *hi = (struct host_info *)__hi;
1680         struct hpsb_host *host = hi->host;
1681         unsigned int g, generation = 0;
1682         int i, reset_cycles = 0;
1683
1684         /* Setup our device-model entries */
1685         nodemgr_create_host_dev_files(host);
1686
1687         for (;;) {
1688                 /* Sleep until next bus reset */
1689                 set_current_state(TASK_INTERRUPTIBLE);
1690                 if (get_hpsb_generation(host) == generation)
1691                         schedule();
1692                 __set_current_state(TASK_RUNNING);
1693
1694                 /* Thread may have been woken up to freeze or to exit */
1695                 if (try_to_freeze())
1696                         continue;
1697                 if (kthread_should_stop())
1698                         goto exit;
1699
1700                 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1701                         if (try_to_freeze())
1702                                 continue;
1703                         goto exit;
1704                 }
1705
1706                 /* Pause for 1/4 second in 1/16 second intervals,
1707                  * to make sure things settle down. */
1708                 g = get_hpsb_generation(host);
1709                 for (i = 0; i < 4 ; i++) {
1710                         if (msleep_interruptible(63) || kthread_should_stop())
1711                                 goto unlock_exit;
1712
1713                         /* Now get the generation in which the node ID's we collect
1714                          * are valid.  During the bus scan we will use this generation
1715                          * for the read transactions, so that if another reset occurs
1716                          * during the scan the transactions will fail instead of
1717                          * returning bogus data. */
1718                         generation = get_hpsb_generation(host);
1719
1720                         /* If we get a reset before we are done waiting, then
1721                          * start the the waiting over again */
1722                         if (generation != g)
1723                                 g = generation, i = 0;
1724                 }
1725
1726                 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1727                     !nodemgr_do_irm_duties(host, reset_cycles)) {
1728                         reset_cycles++;
1729                         mutex_unlock(&nodemgr_serialize);
1730                         continue;
1731                 }
1732                 reset_cycles = 0;
1733
1734                 /* Scan our nodes to get the bus options and create node
1735                  * entries. This does not do the sysfs stuff, since that
1736                  * would trigger uevents and such, which is a bad idea at
1737                  * this point. */
1738                 nodemgr_node_scan(hi, generation);
1739
1740                 /* This actually does the full probe, with sysfs
1741                  * registration. */
1742                 nodemgr_node_probe(hi, generation);
1743
1744                 /* Update some of our sysfs symlinks */
1745                 nodemgr_update_host_dev_links(host);
1746
1747                 mutex_unlock(&nodemgr_serialize);
1748         }
1749 unlock_exit:
1750         mutex_unlock(&nodemgr_serialize);
1751 exit:
1752         HPSB_VERBOSE("NodeMgr: Exiting thread");
1753         return 0;
1754 }
1755
1756 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1757 {
1758         struct class *class = &hpsb_host_class;
1759         struct class_device *cdev;
1760         struct hpsb_host *host;
1761         int error = 0;
1762
1763         down_read(&class->subsys.rwsem);
1764         list_for_each_entry(cdev, &class->children, node) {
1765                 host = container_of(cdev, struct hpsb_host, class_dev);
1766
1767                 if ((error = cb(host, __data)))
1768                         break;
1769         }
1770         up_read(&class->subsys.rwsem);
1771
1772         return error;
1773 }
1774
1775 /* The following four convenience functions use a struct node_entry
1776  * for addressing a node on the bus.  They are intended for use by any
1777  * process context, not just the nodemgr thread, so we need to be a
1778  * little careful when reading out the node ID and generation.  The
1779  * thing that can go wrong is that we get the node ID, then a bus
1780  * reset occurs, and then we read the generation.  The node ID is
1781  * possibly invalid, but the generation is current, and we end up
1782  * sending a packet to a the wrong node.
1783  *
1784  * The solution is to make sure we read the generation first, so that
1785  * if a reset occurs in the process, we end up with a stale generation
1786  * and the transactions will fail instead of silently using wrong node
1787  * ID's.
1788  */
1789
1790 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1791 {
1792         pkt->host = ne->host;
1793         pkt->generation = ne->generation;
1794         barrier();
1795         pkt->node_id = ne->nodeid;
1796 }
1797
1798 int hpsb_node_write(struct node_entry *ne, u64 addr,
1799                     quadlet_t *buffer, size_t length)
1800 {
1801         unsigned int generation = ne->generation;
1802
1803         barrier();
1804         return hpsb_write(ne->host, ne->nodeid, generation,
1805                           addr, buffer, length);
1806 }
1807
1808 static void nodemgr_add_host(struct hpsb_host *host)
1809 {
1810         struct host_info *hi;
1811
1812         hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1813         if (!hi) {
1814                 HPSB_ERR("NodeMgr: out of memory in add host");
1815                 return;
1816         }
1817         hi->host = host;
1818         hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1819                                  host->id);
1820         if (IS_ERR(hi->thread)) {
1821                 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1822                 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1823         }
1824 }
1825
1826 static void nodemgr_host_reset(struct hpsb_host *host)
1827 {
1828         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1829
1830         if (hi) {
1831                 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1832                 wake_up_process(hi->thread);
1833         }
1834 }
1835
1836 static void nodemgr_remove_host(struct hpsb_host *host)
1837 {
1838         struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1839
1840         if (hi) {
1841                 kthread_stop(hi->thread);
1842                 nodemgr_remove_host_dev(&host->device);
1843         }
1844 }
1845
1846 static struct hpsb_highlevel nodemgr_highlevel = {
1847         .name =         "Node manager",
1848         .add_host =     nodemgr_add_host,
1849         .host_reset =   nodemgr_host_reset,
1850         .remove_host =  nodemgr_remove_host,
1851 };
1852
1853 int init_ieee1394_nodemgr(void)
1854 {
1855         int ret;
1856
1857         ret = class_register(&nodemgr_ne_class);
1858         if (ret < 0)
1859                 return ret;
1860
1861         ret = class_register(&nodemgr_ud_class);
1862         if (ret < 0) {
1863                 class_unregister(&nodemgr_ne_class);
1864                 return ret;
1865         }
1866
1867         hpsb_register_highlevel(&nodemgr_highlevel);
1868
1869         return 0;
1870 }
1871
1872 void cleanup_ieee1394_nodemgr(void)
1873 {
1874         hpsb_unregister_highlevel(&nodemgr_highlevel);
1875
1876         class_unregister(&nodemgr_ud_class);
1877         class_unregister(&nodemgr_ne_class);
1878 }