1/* 2 * Node information (ConfigROM) collection and management. 3 * 4 * Copyright (C) 2000 Andreas E. Bombe 5 * 2001-2003 Ben Collins <bcollins@debian.net> 6 * 7 * This code is licensed under the GPL. See the file COPYING in the root 8 * directory of the kernel sources for details. 9 */ 10 11#include <linux/bitmap.h> 12#include <linux/kernel.h> 13#include <linux/list.h> 14#include <linux/slab.h> 15#include <linux/delay.h> 16#include <linux/kthread.h> 17#include <linux/module.h> 18#include <linux/moduleparam.h> 19#include <linux/mutex.h> 20#include <linux/freezer.h> 21#include <asm/atomic.h> 22 23#include "csr.h" 24#include "highlevel.h" 25#include "hosts.h" 26#include "ieee1394.h" 27#include "ieee1394_core.h" 28#include "ieee1394_hotplug.h" 29#include "ieee1394_types.h" 30#include "ieee1394_transactions.h" 31#include "nodemgr.h" 32 33static int ignore_drivers; 34module_param(ignore_drivers, int, S_IRUGO | S_IWUSR); 35MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers."); 36 37struct 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/* 46 * Correct the speed map entry. This is necessary 47 * - for nodes with link speed < phy speed, 48 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX. 49 * A possible speed is determined by trial and error, using quadlet reads. 50 */ 51static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr, 52 quadlet_t *buffer) 53{ 54 quadlet_t q; 55 u8 i, *speed, old_speed, good_speed; 56 int error; 57 58 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]); 59 old_speed = *speed; 60 good_speed = IEEE1394_SPEED_MAX + 1; 61 62 /* Try every speed from S100 to old_speed. 63 * If we did it the other way around, a too low speed could be caught 64 * if the retry succeeded for some other reason, e.g. because the link 65 * just finished its initialization. */ 66 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) { 67 *speed = i; 68 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, 69 &q, sizeof(quadlet_t)); 70 if (error) 71 break; 72 *buffer = q; 73 good_speed = i; 74 } 75 if (good_speed <= IEEE1394_SPEED_MAX) { 76 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s", 77 NODE_BUS_ARGS(ci->host, ci->nodeid), 78 hpsb_speedto_str[good_speed]); 79 *speed = good_speed; 80 ci->speed_unverified = 0; 81 return 0; 82 } 83 *speed = old_speed; 84 return error; 85} 86 87static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length, 88 void *buffer, void *__ci) 89{ 90 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci; 91 int i, error; 92 93 for (i = 1; ; i++) { 94 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr, 95 buffer, length); 96 if (!error) { 97 ci->speed_unverified = 0; 98 break; 99 } 100 /* Give up after 3rd failure. */ 101 if (i == 3) 102 break; 103 104 /* The ieee1394_core guessed the node's speed capability from 105 * the self ID. Check whether a lower speed works. */ 106 if (ci->speed_unverified && length == sizeof(quadlet_t)) { 107 error = nodemgr_check_speed(ci, addr, buffer); 108 if (!error) 109 break; 110 } 111 if (msleep_interruptible(334)) 112 return -EINTR; 113 } 114 return error; 115} 116 117static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci) 118{ 119 return (be32_to_cpu(bus_info_data[2]) >> 8) & 0x3; 120} 121 122static struct csr1212_bus_ops nodemgr_csr_ops = { 123 .bus_read = nodemgr_bus_read, 124 .get_max_rom = nodemgr_get_max_rom 125}; 126 127 128/* 129 * Basically what we do here is start off retrieving the bus_info block. 130 * From there will fill in some info about the node, verify it is of IEEE 131 * 1394 type, and that the crc checks out ok. After that we start off with 132 * the root directory, and subdirectories. To do this, we retrieve the 133 * quadlet header for a directory, find out the length, and retrieve the 134 * complete directory entry (be it a leaf or a directory). We then process 135 * it and add the info to our structure for that particular node. 136 * 137 * We verify CRC's along the way for each directory/block/leaf. The entire 138 * node structure is generic, and simply stores the information in a way 139 * that's easy to parse by the protocol interface. 140 */ 141 142/* 143 * The nodemgr relies heavily on the Driver Model for device callbacks and 144 * driver/device mappings. The old nodemgr used to handle all this itself, 145 * but now we are much simpler because of the LDM. 146 */ 147 148static DEFINE_MUTEX(nodemgr_serialize); 149 150struct host_info { 151 struct hpsb_host *host; 152 struct list_head list; 153 struct task_struct *thread; 154}; 155 156static int nodemgr_bus_match(struct device * dev, struct device_driver * drv); 157static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, 158 char *buffer, int buffer_size); 159static void nodemgr_resume_ne(struct node_entry *ne); 160static void nodemgr_remove_ne(struct node_entry *ne); 161static struct node_entry *find_entry_by_guid(u64 guid); 162 163struct bus_type ieee1394_bus_type = { 164 .name = "ieee1394", 165 .match = nodemgr_bus_match, 166}; 167 168static void host_cls_release(struct class_device *class_dev) 169{ 170 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device); 171} 172 173struct class hpsb_host_class = { 174 .name = "ieee1394_host", 175 .release = host_cls_release, 176}; 177 178static void ne_cls_release(struct class_device *class_dev) 179{ 180 put_device(&container_of((class_dev), struct node_entry, class_dev)->device); 181} 182 183static struct class nodemgr_ne_class = { 184 .name = "ieee1394_node", 185 .release = ne_cls_release, 186}; 187 188static void ud_cls_release(struct class_device *class_dev) 189{ 190 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device); 191} 192 193/* The name here is only so that unit directory hotplug works with old 194 * style hotplug, which only ever did unit directories anyway. */ 195static struct class nodemgr_ud_class = { 196 .name = "ieee1394", 197 .release = ud_cls_release, 198 .uevent = nodemgr_uevent, 199}; 200 201static struct hpsb_highlevel nodemgr_highlevel; 202 203 204static void nodemgr_release_ud(struct device *dev) 205{ 206 struct unit_directory *ud = container_of(dev, struct unit_directory, device); 207 208 if (ud->vendor_name_kv) 209 csr1212_release_keyval(ud->vendor_name_kv); 210 if (ud->model_name_kv) 211 csr1212_release_keyval(ud->model_name_kv); 212 213 kfree(ud); 214} 215 216static void nodemgr_release_ne(struct device *dev) 217{ 218 struct node_entry *ne = container_of(dev, struct node_entry, device); 219 220 if (ne->vendor_name_kv) 221 csr1212_release_keyval(ne->vendor_name_kv); 222 223 kfree(ne); 224} 225 226 227static void nodemgr_release_host(struct device *dev) 228{ 229 struct hpsb_host *host = container_of(dev, struct hpsb_host, device); 230 231 csr1212_destroy_csr(host->csr.rom); 232 233 kfree(host); 234} 235 236static int nodemgr_ud_platform_data; 237 238static struct device nodemgr_dev_template_ud = { 239 .bus = &ieee1394_bus_type, 240 .release = nodemgr_release_ud, 241 .platform_data = &nodemgr_ud_platform_data, 242}; 243 244static struct device nodemgr_dev_template_ne = { 245 .bus = &ieee1394_bus_type, 246 .release = nodemgr_release_ne, 247}; 248 249/* This dummy driver prevents the host devices from being scanned. We have no 250 * useful drivers for them yet, and there would be a deadlock possible if the 251 * driver core scans the host device while the host's low-level driver (i.e. 252 * the host's parent device) is being removed. */ 253static struct device_driver nodemgr_mid_layer_driver = { 254 .bus = &ieee1394_bus_type, 255 .name = "nodemgr", 256 .owner = THIS_MODULE, 257}; 258 259struct device nodemgr_dev_template_host = { 260 .bus = &ieee1394_bus_type, 261 .release = nodemgr_release_host, 262}; 263 264 265#define fw_attr(class, class_type, field, type, format_string) \ 266static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\ 267{ \ 268 class_type *class; \ 269 class = container_of(dev, class_type, device); \ 270 return sprintf(buf, format_string, (type)class->field); \ 271} \ 272static struct device_attribute dev_attr_##class##_##field = { \ 273 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ 274 .show = fw_show_##class##_##field, \ 275}; 276 277#define fw_attr_td(class, class_type, td_kv) \ 278static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\ 279{ \ 280 int len; \ 281 class_type *class = container_of(dev, class_type, device); \ 282 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \ 283 memcpy(buf, \ 284 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \ 285 len); \ 286 while ((buf + len - 1) == '\0') \ 287 len--; \ 288 buf[len++] = '\n'; \ 289 buf[len] = '\0'; \ 290 return len; \ 291} \ 292static struct device_attribute dev_attr_##class##_##td_kv = { \ 293 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \ 294 .show = fw_show_##class##_##td_kv, \ 295}; 296 297 298#define fw_drv_attr(field, type, format_string) \ 299static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \ 300{ \ 301 struct hpsb_protocol_driver *driver; \ 302 driver = container_of(drv, struct hpsb_protocol_driver, driver); \ 303 return sprintf(buf, format_string, (type)driver->field);\ 304} \ 305static struct driver_attribute driver_attr_drv_##field = { \ 306 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \ 307 .show = fw_drv_show_##field, \ 308}; 309 310 311static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf) 312{ 313 struct node_entry *ne = container_of(dev, struct node_entry, device); 314 315 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) " 316 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n", 317 ne->busopt.irmc, 318 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc, 319 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd, 320 ne->busopt.max_rec, 321 ne->busopt.max_rom, 322 ne->busopt.cyc_clk_acc); 323} 324static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL); 325 326 327#ifdef HPSB_DEBUG_TLABELS 328static ssize_t fw_show_ne_tlabels_free(struct device *dev, 329 struct device_attribute *attr, char *buf) 330{ 331 struct node_entry *ne = container_of(dev, struct node_entry, device); 332 unsigned long flags; 333 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; 334 int tf; 335 336 spin_lock_irqsave(&hpsb_tlabel_lock, flags); 337 tf = 64 - bitmap_weight(tp, 64); 338 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); 339 340 return sprintf(buf, "%d\n", tf); 341} 342static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL); 343 344 345static ssize_t fw_show_ne_tlabels_mask(struct device *dev, 346 struct device_attribute *attr, char *buf) 347{ 348 struct node_entry *ne = container_of(dev, struct node_entry, device); 349 unsigned long flags; 350 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map; 351 u64 tm; 352 353 spin_lock_irqsave(&hpsb_tlabel_lock, flags); 354#if (BITS_PER_LONG <= 32) 355 tm = ((u64)tp[0] << 32) + tp[1]; 356#else 357 tm = tp[0]; 358#endif 359 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); 360 361 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm); 362} 363static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL); 364#endif /* HPSB_DEBUG_TLABELS */ 365 366 367static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 368{ 369 struct unit_directory *ud = container_of(dev, struct unit_directory, device); 370 int state = simple_strtoul(buf, NULL, 10); 371 372 if (state == 1) { 373 ud->ignore_driver = 1; 374 device_release_driver(dev); 375 } else if (state == 0) 376 ud->ignore_driver = 0; 377 378 return count; 379} 380static 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} 386static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver); 387 388 389static 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} 403static 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} 407static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node); 408 409 410static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, 411 size_t count) 412{ 413 int error = 0; 414 415 if (simple_strtoul(buf, NULL, 10) == 1) 416 error = bus_rescan_devices(&ieee1394_bus_type); 417 return error ? error : count; 418} 419static ssize_t fw_get_rescan(struct bus_type *bus, char *buf) 420{ 421 return sprintf(buf, "You can force a rescan of the bus for " 422 "drivers by writing a 1 to this file\n"); 423} 424static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan); 425 426 427static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count) 428{ 429 int state = simple_strtoul(buf, NULL, 10); 430 431 if (state == 1) 432 ignore_drivers = 1; 433 else if (state == 0) 434 ignore_drivers = 0; 435 436 return count; 437} 438static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf) 439{ 440 return sprintf(buf, "%d\n", ignore_drivers); 441} 442static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers); 443 444 445struct bus_attribute *const fw_bus_attrs[] = { 446 &bus_attr_destroy_node, 447 &bus_attr_rescan, 448 &bus_attr_ignore_drivers, 449 NULL 450}; 451 452 453fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n") 454fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n") 455 456fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n") 457fw_attr_td(ne, struct node_entry, vendor_name_kv) 458 459fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n") 460fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n") 461fw_attr(ne, struct node_entry, in_limbo, int, "%d\n"); 462 463static struct device_attribute *const fw_ne_attrs[] = { 464 &dev_attr_ne_guid, 465 &dev_attr_ne_guid_vendor_id, 466 &dev_attr_ne_capabilities, 467 &dev_attr_ne_vendor_id, 468 &dev_attr_ne_nodeid, 469 &dev_attr_bus_options, 470#ifdef HPSB_DEBUG_TLABELS 471 &dev_attr_tlabels_free, 472 &dev_attr_tlabels_mask, 473#endif 474}; 475 476 477 478fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n") 479fw_attr(ud, struct unit_directory, length, int, "%d\n") 480/* These are all dependent on the value being provided */ 481fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n") 482fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n") 483fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n") 484fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n") 485fw_attr_td(ud, struct unit_directory, vendor_name_kv) 486fw_attr_td(ud, struct unit_directory, model_name_kv) 487 488static struct device_attribute *const fw_ud_attrs[] = { 489 &dev_attr_ud_address, 490 &dev_attr_ud_length, 491 &dev_attr_ignore_driver, 492}; 493 494 495fw_attr(host, struct hpsb_host, node_count, int, "%d\n") 496fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n") 497fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n") 498fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n") 499fw_attr(host, struct hpsb_host, is_root, int, "%d\n") 500fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n") 501fw_attr(host, struct hpsb_host, is_irm, int, "%d\n") 502fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n") 503 504static struct device_attribute *const fw_host_attrs[] = { 505 &dev_attr_host_node_count, 506 &dev_attr_host_selfid_count, 507 &dev_attr_host_nodes_active, 508 &dev_attr_host_in_bus_reset, 509 &dev_attr_host_is_root, 510 &dev_attr_host_is_cycmst, 511 &dev_attr_host_is_irm, 512 &dev_attr_host_is_busmgr, 513}; 514 515 516static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf) 517{ 518 struct hpsb_protocol_driver *driver; 519 struct ieee1394_device_id *id; 520 int length = 0; 521 char *scratch = buf; 522 523 driver = container_of(drv, struct hpsb_protocol_driver, driver); 524 525 for (id = driver->id_table; id->match_flags != 0; id++) { 526 int need_coma = 0; 527 528 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) { 529 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id); 530 scratch = buf + length; 531 need_coma++; 532 } 533 534 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) { 535 length += sprintf(scratch, "%smodel_id=0x%06x", 536 need_coma++ ? "," : "", 537 id->model_id); 538 scratch = buf + length; 539 } 540 541 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) { 542 length += sprintf(scratch, "%sspecifier_id=0x%06x", 543 need_coma++ ? "," : "", 544 id->specifier_id); 545 scratch = buf + length; 546 } 547 548 if (id->match_flags & IEEE1394_MATCH_VERSION) { 549 length += sprintf(scratch, "%sversion=0x%06x", 550 need_coma++ ? "," : "", 551 id->version); 552 scratch = buf + length; 553 } 554 555 if (need_coma) { 556 *scratch++ = '\n'; 557 length++; 558 } 559 } 560 561 return length; 562} 563static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL); 564 565 566fw_drv_attr(name, const char *, "%s\n") 567 568static struct driver_attribute *const fw_drv_attrs[] = { 569 &driver_attr_drv_name, 570 &driver_attr_device_ids, 571}; 572 573 574static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver) 575{ 576 struct device_driver *drv = &driver->driver; 577 int i; 578 579 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++) 580 if (driver_create_file(drv, fw_drv_attrs[i])) 581 goto fail; 582 return; 583fail: 584 HPSB_ERR("Failed to add sysfs attribute"); 585} 586 587 588static void nodemgr_remove_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_remove_file(drv, fw_drv_attrs[i]); 595} 596 597 598static void nodemgr_create_ne_dev_files(struct node_entry *ne) 599{ 600 struct device *dev = &ne->device; 601 int i; 602 603 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++) 604 if (device_create_file(dev, fw_ne_attrs[i])) 605 goto fail; 606 return; 607fail: 608 HPSB_ERR("Failed to add sysfs attribute"); 609} 610 611 612static void nodemgr_create_host_dev_files(struct hpsb_host *host) 613{ 614 struct device *dev = &host->device; 615 int i; 616 617 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++) 618 if (device_create_file(dev, fw_host_attrs[i])) 619 goto fail; 620 return; 621fail: 622 HPSB_ERR("Failed to add sysfs attribute"); 623} 624 625 626static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, 627 nodeid_t nodeid); 628 629static void nodemgr_update_host_dev_links(struct hpsb_host *host) 630{ 631 struct device *dev = &host->device; 632 struct node_entry *ne; 633 634 sysfs_remove_link(&dev->kobj, "irm_id"); 635 sysfs_remove_link(&dev->kobj, "busmgr_id"); 636 sysfs_remove_link(&dev->kobj, "host_id"); 637 638 if ((ne = find_entry_by_nodeid(host, host->irm_id)) && 639 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id")) 640 goto fail; 641 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) && 642 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id")) 643 goto fail; 644 if ((ne = find_entry_by_nodeid(host, host->node_id)) && 645 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id")) 646 goto fail; 647 return; 648fail: 649 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id); 650} 651 652static void nodemgr_create_ud_dev_files(struct unit_directory *ud) 653{ 654 struct device *dev = &ud->device; 655 int i; 656 657 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++) 658 if (device_create_file(dev, fw_ud_attrs[i])) 659 goto fail; 660 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) 661 if (device_create_file(dev, &dev_attr_ud_specifier_id)) 662 goto fail; 663 if (ud->flags & UNIT_DIRECTORY_VERSION) 664 if (device_create_file(dev, &dev_attr_ud_version)) 665 goto fail; 666 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) { 667 if (device_create_file(dev, &dev_attr_ud_vendor_id)) 668 goto fail; 669 if (ud->vendor_name_kv && 670 device_create_file(dev, &dev_attr_ud_vendor_name_kv)) 671 goto fail; 672 } 673 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) { 674 if (device_create_file(dev, &dev_attr_ud_model_id)) 675 goto fail; 676 if (ud->model_name_kv && 677 device_create_file(dev, &dev_attr_ud_model_name_kv)) 678 goto fail; 679 } 680 return; 681fail: 682 HPSB_ERR("Failed to add sysfs attribute"); 683} 684 685 686static int nodemgr_bus_match(struct device * dev, struct device_driver * drv) 687{ 688 struct hpsb_protocol_driver *driver; 689 struct unit_directory *ud; 690 struct ieee1394_device_id *id; 691 692 /* We only match unit directories */ 693 if (dev->platform_data != &nodemgr_ud_platform_data) 694 return 0; 695 696 ud = container_of(dev, struct unit_directory, device); 697 if (ud->ne->in_limbo || ud->ignore_driver) 698 return 0; 699 700 /* We only match drivers of type hpsb_protocol_driver */ 701 if (drv == &nodemgr_mid_layer_driver) 702 return 0; 703 704 driver = container_of(drv, struct hpsb_protocol_driver, driver); 705 for (id = driver->id_table; id->match_flags != 0; id++) { 706 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) && 707 id->vendor_id != ud->vendor_id) 708 continue; 709 710 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) && 711 id->model_id != ud->model_id) 712 continue; 713 714 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) && 715 id->specifier_id != ud->specifier_id) 716 continue; 717 718 if ((id->match_flags & IEEE1394_MATCH_VERSION) && 719 id->version != ud->version) 720 continue; 721 722 return 1; 723 } 724 725 return 0; 726} 727 728 729static DEFINE_MUTEX(nodemgr_serialize_remove_uds); 730 731static void nodemgr_remove_uds(struct node_entry *ne) 732{ 733 struct class_device *cdev; 734 struct unit_directory *tmp, *ud; 735 736 /* Iteration over nodemgr_ud_class.children has to be protected by 737 * nodemgr_ud_class.sem, but class_device_unregister() will eventually 738 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time, 739 * release the semaphore, and then unregister the ud. Since this code 740 * may be called from other contexts besides the knodemgrds, protect the 741 * gap after release of the semaphore by nodemgr_serialize_remove_uds. 742 */ 743 mutex_lock(&nodemgr_serialize_remove_uds); 744 for (;;) { 745 ud = NULL; 746 down(&nodemgr_ud_class.sem); 747 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { 748 tmp = container_of(cdev, struct unit_directory, 749 class_dev); 750 if (tmp->ne == ne) { 751 ud = tmp; 752 break; 753 } 754 } 755 up(&nodemgr_ud_class.sem); 756 if (ud == NULL) 757 break; 758 class_device_unregister(&ud->class_dev); 759 device_unregister(&ud->device); 760 } 761 mutex_unlock(&nodemgr_serialize_remove_uds); 762} 763 764 765static void nodemgr_remove_ne(struct node_entry *ne) 766{ 767 struct device *dev; 768 769 dev = get_device(&ne->device); 770 if (!dev) 771 return; 772 773 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", 774 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); 775 776 nodemgr_remove_uds(ne); 777 778 class_device_unregister(&ne->class_dev); 779 device_unregister(dev); 780 781 put_device(dev); 782} 783 784static int __nodemgr_remove_host_dev(struct device *dev, void *data) 785{ 786 nodemgr_remove_ne(container_of(dev, struct node_entry, device)); 787 return 0; 788} 789 790static void nodemgr_remove_host_dev(struct device *dev) 791{ 792 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev)); 793 sysfs_remove_link(&dev->kobj, "irm_id"); 794 sysfs_remove_link(&dev->kobj, "busmgr_id"); 795 sysfs_remove_link(&dev->kobj, "host_id"); 796} 797 798 799static void nodemgr_update_bus_options(struct node_entry *ne) 800{ 801#ifdef CONFIG_IEEE1394_VERBOSEDEBUG 802 static const u16 mr[] = { 4, 64, 1024, 0}; 803#endif 804 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]); 805 806 ne->busopt.irmc = (busoptions >> 31) & 1; 807 ne->busopt.cmc = (busoptions >> 30) & 1; 808 ne->busopt.isc = (busoptions >> 29) & 1; 809 ne->busopt.bmc = (busoptions >> 28) & 1; 810 ne->busopt.pmc = (busoptions >> 27) & 1; 811 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff; 812 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1); 813 ne->busopt.max_rom = (busoptions >> 8) & 0x3; 814 ne->busopt.generation = (busoptions >> 4) & 0xf; 815 ne->busopt.lnkspd = busoptions & 0x7; 816 817 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d " 818 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d", 819 busoptions, ne->busopt.irmc, ne->busopt.cmc, 820 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc, 821 ne->busopt.cyc_clk_acc, ne->busopt.max_rec, 822 mr[ne->busopt.max_rom], 823 ne->busopt.generation, ne->busopt.lnkspd); 824} 825 826 827static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr, 828 struct host_info *hi, nodeid_t nodeid, 829 unsigned int generation) 830{ 831 struct hpsb_host *host = hi->host; 832 struct node_entry *ne; 833 834 ne = kzalloc(sizeof(*ne), GFP_KERNEL); 835 if (!ne) 836 goto fail_alloc; 837 838 ne->host = host; 839 ne->nodeid = nodeid; 840 ne->generation = generation; 841 ne->needs_probe = 1; 842 843 ne->guid = guid; 844 ne->guid_vendor_id = (guid >> 40) & 0xffffff; 845 ne->csr = csr; 846 847 memcpy(&ne->device, &nodemgr_dev_template_ne, 848 sizeof(ne->device)); 849 ne->device.parent = &host->device; 850 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx", 851 (unsigned long long)(ne->guid)); 852 853 ne->class_dev.dev = &ne->device; 854 ne->class_dev.class = &nodemgr_ne_class; 855 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx", 856 (unsigned long long)(ne->guid)); 857 858 if (device_register(&ne->device)) 859 goto fail_devreg; 860 if (class_device_register(&ne->class_dev)) 861 goto fail_classdevreg; 862 get_device(&ne->device); 863 864 nodemgr_create_ne_dev_files(ne); 865 866 nodemgr_update_bus_options(ne); 867 868 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", 869 (host->node_id == nodeid) ? "Host" : "Node", 870 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); 871 872 return ne; 873 874fail_classdevreg: 875 device_unregister(&ne->device); 876fail_devreg: 877 kfree(ne); 878fail_alloc: 879 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", 880 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid); 881 882 return NULL; 883} 884 885 886static struct node_entry *find_entry_by_guid(u64 guid) 887{ 888 struct class_device *cdev; 889 struct node_entry *ne, *ret_ne = NULL; 890 891 down(&nodemgr_ne_class.sem); 892 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { 893 ne = container_of(cdev, struct node_entry, class_dev); 894 895 if (ne->guid == guid) { 896 ret_ne = ne; 897 break; 898 } 899 } 900 up(&nodemgr_ne_class.sem); 901 902 return ret_ne; 903} 904 905 906static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, 907 nodeid_t nodeid) 908{ 909 struct class_device *cdev; 910 struct node_entry *ne, *ret_ne = NULL; 911 912 down(&nodemgr_ne_class.sem); 913 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { 914 ne = container_of(cdev, struct node_entry, class_dev); 915 916 if (ne->host == host && ne->nodeid == nodeid) { 917 ret_ne = ne; 918 break; 919 } 920 } 921 up(&nodemgr_ne_class.sem); 922 923 return ret_ne; 924} 925 926 927static void nodemgr_register_device(struct node_entry *ne, 928 struct unit_directory *ud, struct device *parent) 929{ 930 memcpy(&ud->device, &nodemgr_dev_template_ud, 931 sizeof(ud->device)); 932 933 ud->device.parent = parent; 934 935 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u", 936 ne->device.bus_id, ud->id); 937 938 ud->class_dev.dev = &ud->device; 939 ud->class_dev.class = &nodemgr_ud_class; 940 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u", 941 ne->device.bus_id, ud->id); 942 943 if (device_register(&ud->device)) 944 goto fail_devreg; 945 if (class_device_register(&ud->class_dev)) 946 goto fail_classdevreg; 947 get_device(&ud->device); 948 949 nodemgr_create_ud_dev_files(ud); 950 951 return; 952 953fail_classdevreg: 954 device_unregister(&ud->device); 955fail_devreg: 956 HPSB_ERR("Failed to create unit %s", ud->device.bus_id); 957} 958 959 960/* This implementation currently only scans the config rom and its 961 * immediate unit directories looking for software_id and 962 * software_version entries, in order to get driver autoloading working. */ 963static struct unit_directory *nodemgr_process_unit_directory 964 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv, 965 unsigned int *id, struct unit_directory *parent) 966{ 967 struct unit_directory *ud; 968 struct unit_directory *ud_child = NULL; 969 struct csr1212_dentry *dentry; 970 struct csr1212_keyval *kv; 971 u8 last_key_id = 0; 972 973 ud = kzalloc(sizeof(*ud), GFP_KERNEL); 974 if (!ud) 975 goto unit_directory_error; 976 977 ud->ne = ne; 978 ud->ignore_driver = ignore_drivers; 979 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE; 980 ud->directory_id = ud->address & 0xffffff; 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 break; 992 993 case CSR1212_KV_ID_MODEL: 994 ud->model_id = kv->value.immediate; 995 ud->flags |= UNIT_DIRECTORY_MODEL_ID; 996 break; 997 998 case CSR1212_KV_ID_SPECIFIER_ID: 999 ud->specifier_id = kv->value.immediate; 1000 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID; 1001 break; 1002 1003 case CSR1212_KV_ID_VERSION: 1004 ud->version = kv->value.immediate; 1005 ud->flags |= UNIT_DIRECTORY_VERSION; 1006 break; 1007 1008 case CSR1212_KV_ID_DESCRIPTOR: 1009 if (kv->key.type == CSR1212_KV_TYPE_LEAF && 1010 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && 1011 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && 1012 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && 1013 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && 1014 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { 1015 switch (last_key_id) { 1016 case CSR1212_KV_ID_VENDOR: 1017 ud->vendor_name_kv = kv; 1018 csr1212_keep_keyval(kv); 1019 break; 1020 1021 case CSR1212_KV_ID_MODEL: 1022 ud->model_name_kv = kv; 1023 csr1212_keep_keyval(kv); 1024 break; 1025 1026 } 1027 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */ 1028 break; 1029 1030 case CSR1212_KV_ID_DEPENDENT_INFO: 1031 /* Logical Unit Number */ 1032 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { 1033 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) { 1034 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL); 1035 if (!ud_child) 1036 goto unit_directory_error; 1037 nodemgr_register_device(ne, ud_child, &ne->device); 1038 ud_child = NULL; 1039 1040 ud->id = (*id)++; 1041 } 1042 ud->lun = kv->value.immediate; 1043 ud->flags |= UNIT_DIRECTORY_HAS_LUN; 1044 1045 /* Logical Unit Directory */ 1046 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) { 1047 /* This should really be done in SBP2 as this is 1048 * doing SBP2 specific parsing. 1049 */ 1050 1051 /* first register the parent unit */ 1052 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY; 1053 if (ud->device.bus != &ieee1394_bus_type) 1054 nodemgr_register_device(ne, ud, &ne->device); 1055 1056 /* process the child unit */ 1057 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud); 1058 1059 if (ud_child == NULL) 1060 break; 1061 1062 /* inherit unspecified values, the driver core picks it up */ 1063 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) && 1064 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID)) 1065 { 1066 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID; 1067 ud_child->model_id = ud->model_id; 1068 } 1069 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) && 1070 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID)) 1071 { 1072 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID; 1073 ud_child->specifier_id = ud->specifier_id; 1074 } 1075 if ((ud->flags & UNIT_DIRECTORY_VERSION) && 1076 !(ud_child->flags & UNIT_DIRECTORY_VERSION)) 1077 { 1078 ud_child->flags |= UNIT_DIRECTORY_VERSION; 1079 ud_child->version = ud->version; 1080 } 1081 1082 /* register the child unit */ 1083 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY; 1084 nodemgr_register_device(ne, ud_child, &ud->device); 1085 } 1086 1087 break; 1088 1089 case CSR1212_KV_ID_DIRECTORY_ID: 1090 ud->directory_id = kv->value.immediate; 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 1105unit_directory_error: 1106 kfree(ud); 1107 return NULL; 1108} 1109 1110 1111static 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 break; 1125 1126 case CSR1212_KV_ID_NODE_CAPABILITIES: 1127 ne->capabilities = kv->value.immediate; 1128 break; 1129 1130 case CSR1212_KV_ID_UNIT: 1131 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL); 1132 break; 1133 1134 case CSR1212_KV_ID_DESCRIPTOR: 1135 if (last_key_id == CSR1212_KV_ID_VENDOR) { 1136 if (kv->key.type == CSR1212_KV_TYPE_LEAF && 1137 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 && 1138 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 && 1139 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 && 1140 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 && 1141 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) { 1142 ne->vendor_name_kv = kv; 1143 csr1212_keep_keyval(kv); 1144 } 1145 } 1146 break; 1147 } 1148 last_key_id = kv->key.id; 1149 } 1150 1151 if (ne->vendor_name_kv) { 1152 int error = device_create_file(&ne->device, 1153 &dev_attr_ne_vendor_name_kv); 1154 1155 if (error && error != -EEXIST) 1156 HPSB_ERR("Failed to add sysfs attribute"); 1157 } 1158} 1159 1160#ifdef CONFIG_HOTPLUG 1161 1162static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, 1163 char *buffer, int buffer_size) 1164{ 1165 struct unit_directory *ud; 1166 int i = 0; 1167 int length = 0; 1168 int retval = 0; 1169 /* ieee1394:venNmoNspNverN */ 1170 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1]; 1171 1172 if (!cdev) 1173 return -ENODEV; 1174 1175 ud = container_of(cdev, struct unit_directory, class_dev); 1176 1177 if (ud->ne->in_limbo || ud->ignore_driver) 1178 return -ENODEV; 1179 1180#define PUT_ENVP(fmt,val) \ 1181do { \ 1182 retval = add_uevent_var(envp, num_envp, &i, \ 1183 buffer, buffer_size, &length, \ 1184 fmt, val); \ 1185 if (retval) \ 1186 return retval; \ 1187} while (0) 1188 1189 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id); 1190 PUT_ENVP("MODEL_ID=%06x", ud->model_id); 1191 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid); 1192 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id); 1193 PUT_ENVP("VERSION=%06x", ud->version); 1194 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X", 1195 ud->vendor_id, 1196 ud->model_id, 1197 ud->specifier_id, 1198 ud->version); 1199 PUT_ENVP("MODALIAS=%s", buf); 1200 1201#undef PUT_ENVP 1202 1203 envp[i] = NULL; 1204 1205 return 0; 1206} 1207 1208#else 1209 1210static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp, 1211 char *buffer, int buffer_size) 1212{ 1213 return -ENODEV; 1214} 1215 1216#endif /* CONFIG_HOTPLUG */ 1217 1218 1219int __hpsb_register_protocol(struct hpsb_protocol_driver *drv, 1220 struct module *owner) 1221{ 1222 int error; 1223 1224 drv->driver.bus = &ieee1394_bus_type; 1225 drv->driver.owner = owner; 1226 drv->driver.name = drv->name; 1227 1228 /* This will cause a probe for devices */ 1229 error = driver_register(&drv->driver); 1230 if (!error) 1231 nodemgr_create_drv_files(drv); 1232 return error; 1233} 1234 1235void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver) 1236{ 1237 nodemgr_remove_drv_files(driver); 1238 /* This will subsequently disconnect all devices that our driver 1239 * is attached to. */ 1240 driver_unregister(&driver->driver); 1241} 1242 1243 1244/* 1245 * This function updates nodes that were present on the bus before the 1246 * reset and still are after the reset. The nodeid and the config rom 1247 * may have changed, and the drivers managing this device must be 1248 * informed that this device just went through a bus reset, to allow 1249 * the to take whatever actions required. 1250 */ 1251static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr, 1252 struct host_info *hi, nodeid_t nodeid, 1253 unsigned int generation) 1254{ 1255 if (ne->nodeid != nodeid) { 1256 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT, 1257 NODE_BUS_ARGS(ne->host, ne->nodeid), 1258 NODE_BUS_ARGS(ne->host, nodeid)); 1259 ne->nodeid = nodeid; 1260 } 1261 1262 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) { 1263 kfree(ne->csr->private); 1264 csr1212_destroy_csr(ne->csr); 1265 ne->csr = csr; 1266 1267 /* If the node's configrom generation has changed, we 1268 * unregister all the unit directories. */ 1269 nodemgr_remove_uds(ne); 1270 1271 nodemgr_update_bus_options(ne); 1272 1273 /* Mark the node as new, so it gets re-probed */ 1274 ne->needs_probe = 1; 1275 } else { 1276 /* old cache is valid, so update its generation */ 1277 struct nodemgr_csr_info *ci = ne->csr->private; 1278 ci->generation = generation; 1279 /* free the partially filled now unneeded new cache */ 1280 kfree(csr->private); 1281 csr1212_destroy_csr(csr); 1282 } 1283 1284 if (ne->in_limbo) 1285 nodemgr_resume_ne(ne); 1286 1287 /* Mark the node current */ 1288 ne->generation = generation; 1289} 1290 1291 1292 1293static void nodemgr_node_scan_one(struct host_info *hi, 1294 nodeid_t nodeid, int generation) 1295{ 1296 struct hpsb_host *host = hi->host; 1297 struct node_entry *ne; 1298 octlet_t guid; 1299 struct csr1212_csr *csr; 1300 struct nodemgr_csr_info *ci; 1301 u8 *speed; 1302 1303 ci = kmalloc(sizeof(*ci), GFP_KERNEL); 1304 if (!ci) 1305 return; 1306 1307 ci->host = host; 1308 ci->nodeid = nodeid; 1309 ci->generation = generation; 1310 1311 /* Prepare for speed probe which occurs when reading the ROM */ 1312 speed = &(host->speed[NODEID_TO_NODE(nodeid)]); 1313 if (*speed > host->csr.lnk_spd) 1314 *speed = host->csr.lnk_spd; 1315 ci->speed_unverified = *speed > IEEE1394_SPEED_100; 1316 1317 /* We need to detect when the ConfigROM's generation has changed, 1318 * so we only update the node's info when it needs to be. */ 1319 1320 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci); 1321 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) { 1322 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT, 1323 NODE_BUS_ARGS(host, nodeid)); 1324 if (csr) 1325 csr1212_destroy_csr(csr); 1326 kfree(ci); 1327 return; 1328 } 1329 1330 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) { 1331 /* This isn't a 1394 device, but we let it slide. There 1332 * was a report of a device with broken firmware which 1333 * reported '2394' instead of '1394', which is obviously a 1334 * mistake. One would hope that a non-1394 device never 1335 * gets connected to Firewire bus. If someone does, we 1336 * shouldn't be held responsible, so we'll allow it with a 1337 * warning. */ 1338 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]", 1339 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]); 1340 } 1341 1342 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]); 1343 ne = find_entry_by_guid(guid); 1344 1345 if (ne && ne->host != host && ne->in_limbo) { 1346 /* Must have moved this device from one host to another */ 1347 nodemgr_remove_ne(ne); 1348 ne = NULL; 1349 } 1350 1351 if (!ne) 1352 nodemgr_create_node(guid, csr, hi, nodeid, generation); 1353 else 1354 nodemgr_update_node(ne, csr, hi, nodeid, generation); 1355} 1356 1357 1358static void nodemgr_node_scan(struct host_info *hi, int generation) 1359{ 1360 int count; 1361 struct hpsb_host *host = hi->host; 1362 struct selfid *sid = (struct selfid *)host->topology_map; 1363 nodeid_t nodeid = LOCAL_BUS; 1364 1365 /* Scan each node on the bus */ 1366 for (count = host->selfid_count; count; count--, sid++) { 1367 if (sid->extended) 1368 continue; 1369 1370 if (!sid->link_active) { 1371 nodeid++; 1372 continue; 1373 } 1374 nodemgr_node_scan_one(hi, nodeid++, generation); 1375 } 1376} 1377 1378 1379static void nodemgr_suspend_ne(struct node_entry *ne) 1380{ 1381 struct class_device *cdev; 1382 struct unit_directory *ud; 1383 1384 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", 1385 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); 1386 1387 ne->in_limbo = 1; 1388 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo)); 1389 1390 down(&nodemgr_ud_class.sem); 1391 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { 1392 ud = container_of(cdev, struct unit_directory, class_dev); 1393 if (ud->ne != ne) 1394 continue; 1395 1396 if (ud->device.driver && 1397 (!ud->device.driver->suspend || 1398 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND))) 1399 device_release_driver(&ud->device); 1400 } 1401 up(&nodemgr_ud_class.sem); 1402} 1403 1404 1405static void nodemgr_resume_ne(struct node_entry *ne) 1406{ 1407 struct class_device *cdev; 1408 struct unit_directory *ud; 1409 1410 ne->in_limbo = 0; 1411 device_remove_file(&ne->device, &dev_attr_ne_in_limbo); 1412 1413 down(&nodemgr_ud_class.sem); 1414 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { 1415 ud = container_of(cdev, struct unit_directory, class_dev); 1416 if (ud->ne != ne) 1417 continue; 1418 1419 if (ud->device.driver && ud->device.driver->resume) 1420 ud->device.driver->resume(&ud->device); 1421 } 1422 up(&nodemgr_ud_class.sem); 1423 1424 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]", 1425 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid); 1426} 1427 1428 1429static void nodemgr_update_pdrv(struct node_entry *ne) 1430{ 1431 struct unit_directory *ud; 1432 struct hpsb_protocol_driver *pdrv; 1433 struct class_device *cdev; 1434 1435 down(&nodemgr_ud_class.sem); 1436 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) { 1437 ud = container_of(cdev, struct unit_directory, class_dev); 1438 if (ud->ne != ne) 1439 continue; 1440 1441 if (ud->device.driver) { 1442 pdrv = container_of(ud->device.driver, 1443 struct hpsb_protocol_driver, 1444 driver); 1445 if (pdrv->update && pdrv->update(ud)) 1446 device_release_driver(&ud->device); 1447 } 1448 } 1449 up(&nodemgr_ud_class.sem); 1450} 1451 1452 1453/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This 1454 * seems like an optional service but in the end it is practically mandatory 1455 * as a consequence of these clauses. 1456 * 1457 * Note that we cannot do a broadcast write to all nodes at once because some 1458 * pre-1394a devices would hang. */ 1459static void nodemgr_irm_write_bc(struct node_entry *ne, int generation) 1460{ 1461 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL); 1462 quadlet_t bc_remote, bc_local; 1463 int error; 1464 1465 if (!ne->host->is_irm || ne->generation != generation || 1466 ne->nodeid == ne->host->node_id) 1467 return; 1468 1469 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel); 1470 1471 /* Check if the register is implemented and 1394a compliant. */ 1472 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote, 1473 sizeof(bc_remote)); 1474 if (!error && bc_remote & cpu_to_be32(0x80000000) && 1475 bc_remote != bc_local) 1476 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local)); 1477} 1478 1479 1480static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation) 1481{ 1482 struct device *dev; 1483 1484 if (ne->host != hi->host || ne->in_limbo) 1485 return; 1486 1487 dev = get_device(&ne->device); 1488 if (!dev) 1489 return; 1490 1491 nodemgr_irm_write_bc(ne, generation); 1492 1493 /* If "needs_probe", then this is either a new or changed node we 1494 * rescan totally. If the generation matches for an existing node 1495 * (one that existed prior to the bus reset) we send update calls 1496 * down to the drivers. Otherwise, this is a dead node and we 1497 * suspend it. */ 1498 if (ne->needs_probe) 1499 nodemgr_process_root_directory(hi, ne); 1500 else if (ne->generation == generation) 1501 nodemgr_update_pdrv(ne); 1502 else 1503 nodemgr_suspend_ne(ne); 1504 1505 put_device(dev); 1506} 1507 1508 1509static void nodemgr_node_probe(struct host_info *hi, int generation) 1510{ 1511 struct hpsb_host *host = hi->host; 1512 struct class_device *cdev; 1513 struct node_entry *ne; 1514 1515 /* Do some processing of the nodes we've probed. This pulls them 1516 * into the sysfs layer if needed, and can result in processing of 1517 * unit-directories, or just updating the node and it's 1518 * unit-directories. 1519 * 1520 * Run updates before probes. Usually, updates are time-critical 1521 * while probes are time-consuming. (Well, those probes need some 1522 * improvement...) */ 1523 1524 down(&nodemgr_ne_class.sem); 1525 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { 1526 ne = container_of(cdev, struct node_entry, class_dev); 1527 if (!ne->needs_probe) 1528 nodemgr_probe_ne(hi, ne, generation); 1529 } 1530 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) { 1531 ne = container_of(cdev, struct node_entry, class_dev); 1532 if (ne->needs_probe) 1533 nodemgr_probe_ne(hi, ne, generation); 1534 } 1535 up(&nodemgr_ne_class.sem); 1536 1537 1538 /* If we had a bus reset while we were scanning the bus, it is 1539 * possible that we did not probe all nodes. In that case, we 1540 * skip the clean up for now, since we could remove nodes that 1541 * were still on the bus. Another bus scan is pending which will 1542 * do the clean up eventually. 1543 * 1544 * Now let's tell the bus to rescan our devices. This may seem 1545 * like overhead, but the driver-model core will only scan a 1546 * device for a driver when either the device is added, or when a 1547 * new driver is added. A bus reset is a good reason to rescan 1548 * devices that were there before. For example, an sbp2 device 1549 * may become available for login, if the host that held it was 1550 * just removed. */ 1551 1552 if (generation == get_hpsb_generation(host)) 1553 if (bus_rescan_devices(&ieee1394_bus_type)) 1554 HPSB_DEBUG("bus_rescan_devices had an error"); 1555} 1556 1557static int nodemgr_send_resume_packet(struct hpsb_host *host) 1558{ 1559 struct hpsb_packet *packet; 1560 int error = -ENOMEM; 1561 1562 packet = hpsb_make_phypacket(host, 1563 EXTPHYPACKET_TYPE_RESUME | 1564 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT); 1565 if (packet) { 1566 packet->no_waiter = 1; 1567 packet->generation = get_hpsb_generation(host); 1568 error = hpsb_send_packet(packet); 1569 } 1570 if (error) 1571 HPSB_WARN("fw-host%d: Failed to broadcast resume packet", 1572 host->id); 1573 return error; 1574} 1575 1576/* Perform a few high-level IRM responsibilities. */ 1577static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles) 1578{ 1579 quadlet_t bc; 1580 1581 /* if irm_id == -1 then there is no IRM on this bus */ 1582 if (!host->is_irm || host->irm_id == (nodeid_t)-1) 1583 return 1; 1584 1585 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */ 1586 host->csr.broadcast_channel |= 0x40000000; 1587 1588 /* If there is no bus manager then we should set the root node's 1589 * force_root bit to promote bus stability per the 1394 1590 * spec. (8.4.2.6) */ 1591 if (host->busmgr_id == 0xffff && host->node_count > 1) 1592 { 1593 u16 root_node = host->node_count - 1; 1594 1595 /* get cycle master capability flag from root node */ 1596 if (host->is_cycmst || 1597 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host), 1598 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)), 1599 &bc, sizeof(quadlet_t)) && 1600 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT)) 1601 hpsb_send_phy_config(host, root_node, -1); 1602 else { 1603 HPSB_DEBUG("The root node is not cycle master capable; " 1604 "selecting a new root node and resetting..."); 1605 1606 if (cycles >= 5) { 1607 /* Oh screw it! Just leave the bus as it is */ 1608 HPSB_DEBUG("Stopping reset loop for IRM sanity"); 1609 return 1; 1610 } 1611 1612 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); 1613 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); 1614 1615 return 0; 1616 } 1617 } 1618 1619 /* Some devices suspend their ports while being connected to an inactive 1620 * host adapter, i.e. if connected before the low-level driver is 1621 * loaded. They become visible either when physically unplugged and 1622 * replugged, or when receiving a resume packet. Send one once. */ 1623 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host)) 1624 host->resume_packet_sent = 1; 1625 1626 return 1; 1627} 1628 1629/* We need to ensure that if we are not the IRM, that the IRM node is capable of 1630 * everything we can do, otherwise issue a bus reset and try to become the IRM 1631 * ourselves. */ 1632static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles) 1633{ 1634 quadlet_t bc; 1635 int status; 1636 1637 if (hpsb_disable_irm || host->is_irm) 1638 return 1; 1639 1640 status = hpsb_read(host, LOCAL_BUS | (host->irm_id), 1641 get_hpsb_generation(host), 1642 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL), 1643 &bc, sizeof(quadlet_t)); 1644 1645 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) { 1646 /* The current irm node does not have a valid BROADCAST_CHANNEL 1647 * register and we do, so reset the bus with force_root set */ 1648 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting..."); 1649 1650 if (cycles >= 5) { 1651 /* Oh screw it! Just leave the bus as it is */ 1652 HPSB_DEBUG("Stopping reset loop for IRM sanity"); 1653 return 1; 1654 } 1655 1656 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1); 1657 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT); 1658 1659 return 0; 1660 } 1661 1662 return 1; 1663} 1664 1665static int nodemgr_host_thread(void *__hi) 1666{ 1667 struct host_info *hi = (struct host_info *)__hi; 1668 struct hpsb_host *host = hi->host; 1669 unsigned int g, generation = 0; 1670 int i, reset_cycles = 0; 1671 1672 /* Setup our device-model entries */ 1673 nodemgr_create_host_dev_files(host); 1674 1675 for (;;) { 1676 /* Sleep until next bus reset */ 1677 set_current_state(TASK_INTERRUPTIBLE); 1678 if (get_hpsb_generation(host) == generation && 1679 !kthread_should_stop()) 1680 schedule(); 1681 __set_current_state(TASK_RUNNING); 1682 1683 /* Thread may have been woken up to freeze or to exit */ 1684 if (try_to_freeze()) 1685 continue; 1686 if (kthread_should_stop()) 1687 goto exit; 1688 1689 if (mutex_lock_interruptible(&nodemgr_serialize)) { 1690 if (try_to_freeze()) 1691 continue; 1692 goto exit; 1693 } 1694 1695 /* Pause for 1/4 second in 1/16 second intervals, 1696 * to make sure things settle down. */ 1697 g = get_hpsb_generation(host); 1698 for (i = 0; i < 4 ; i++) { 1699 if (msleep_interruptible(63) || kthread_should_stop()) 1700 goto unlock_exit; 1701 1702 /* Now get the generation in which the node ID's we collect 1703 * are valid. During the bus scan we will use this generation 1704 * for the read transactions, so that if another reset occurs 1705 * during the scan the transactions will fail instead of 1706 * returning bogus data. */ 1707 generation = get_hpsb_generation(host); 1708 1709 /* If we get a reset before we are done waiting, then 1710 * start the waiting over again */ 1711 if (generation != g) 1712 g = generation, i = 0; 1713 } 1714 1715 if (!nodemgr_check_irm_capability(host, reset_cycles) || 1716 !nodemgr_do_irm_duties(host, reset_cycles)) { 1717 reset_cycles++; 1718 mutex_unlock(&nodemgr_serialize); 1719 continue; 1720 } 1721 reset_cycles = 0; 1722 1723 /* Scan our nodes to get the bus options and create node 1724 * entries. This does not do the sysfs stuff, since that 1725 * would trigger uevents and such, which is a bad idea at 1726 * this point. */ 1727 nodemgr_node_scan(hi, generation); 1728 1729 /* This actually does the full probe, with sysfs 1730 * registration. */ 1731 nodemgr_node_probe(hi, generation); 1732 1733 /* Update some of our sysfs symlinks */ 1734 nodemgr_update_host_dev_links(host); 1735 1736 mutex_unlock(&nodemgr_serialize); 1737 } 1738unlock_exit: 1739 mutex_unlock(&nodemgr_serialize); 1740exit: 1741 HPSB_VERBOSE("NodeMgr: Exiting thread"); 1742 return 0; 1743} 1744 1745/** 1746 * nodemgr_for_each_host - call a function for each IEEE 1394 host 1747 * @data: an address to supply to the callback 1748 * @cb: function to call for each host 1749 * 1750 * Iterate the hosts, calling a given function with supplied data for each host. 1751 * If the callback fails on a host, i.e. if it returns a non-zero value, the 1752 * iteration is stopped. 1753 * 1754 * Return value: 0 on success, non-zero on failure (same as returned by last run 1755 * of the callback). 1756 */ 1757int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *)) 1758{ 1759 struct class_device *cdev; 1760 struct hpsb_host *host; 1761 int error = 0; 1762 1763 down(&hpsb_host_class.sem); 1764 list_for_each_entry(cdev, &hpsb_host_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(&hpsb_host_class.sem); 1771 1772 return error; 1773} 1774 1775/* The following two 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/** 1791 * hpsb_node_fill_packet - fill some destination information into a packet 1792 * @ne: destination node 1793 * @packet: packet to fill in 1794 * 1795 * This will fill in the given, pre-initialised hpsb_packet with the current 1796 * information from the node entry (host, node ID, bus generation number). 1797 */ 1798void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet) 1799{ 1800 packet->host = ne->host; 1801 packet->generation = ne->generation; 1802 barrier(); 1803 packet->node_id = ne->nodeid; 1804} 1805 1806int hpsb_node_write(struct node_entry *ne, u64 addr, 1807 quadlet_t *buffer, size_t length) 1808{ 1809 unsigned int generation = ne->generation; 1810 1811 barrier(); 1812 return hpsb_write(ne->host, ne->nodeid, generation, 1813 addr, buffer, length); 1814} 1815 1816static void nodemgr_add_host(struct hpsb_host *host) 1817{ 1818 struct host_info *hi; 1819 1820 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi)); 1821 if (!hi) { 1822 HPSB_ERR("NodeMgr: out of memory in add host"); 1823 return; 1824 } 1825 hi->host = host; 1826 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d", 1827 host->id); 1828 if (IS_ERR(hi->thread)) { 1829 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id); 1830 hpsb_destroy_hostinfo(&nodemgr_highlevel, host); 1831 } 1832} 1833 1834static void nodemgr_host_reset(struct hpsb_host *host) 1835{ 1836 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); 1837 1838 if (hi) { 1839 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id); 1840 wake_up_process(hi->thread); 1841 } 1842} 1843 1844static void nodemgr_remove_host(struct hpsb_host *host) 1845{ 1846 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host); 1847 1848 if (hi) { 1849 kthread_stop(hi->thread); 1850 nodemgr_remove_host_dev(&host->device); 1851 } 1852} 1853 1854static struct hpsb_highlevel nodemgr_highlevel = { 1855 .name = "Node manager", 1856 .add_host = nodemgr_add_host, 1857 .host_reset = nodemgr_host_reset, 1858 .remove_host = nodemgr_remove_host, 1859}; 1860 1861int init_ieee1394_nodemgr(void) 1862{ 1863 int error; 1864 1865 error = class_register(&nodemgr_ne_class); 1866 if (error) 1867 goto fail_ne; 1868 error = class_register(&nodemgr_ud_class); 1869 if (error) 1870 goto fail_ud; 1871 error = driver_register(&nodemgr_mid_layer_driver); 1872 if (error) 1873 goto fail_ml; 1874 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */ 1875 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver; 1876 1877 hpsb_register_highlevel(&nodemgr_highlevel); 1878 return 0; 1879 1880fail_ml: 1881 class_unregister(&nodemgr_ud_class); 1882fail_ud: 1883 class_unregister(&nodemgr_ne_class); 1884fail_ne: 1885 return error; 1886} 1887 1888void cleanup_ieee1394_nodemgr(void) 1889{ 1890 hpsb_unregister_highlevel(&nodemgr_highlevel); 1891 driver_unregister(&nodemgr_mid_layer_driver); 1892 class_unregister(&nodemgr_ud_class); 1893 class_unregister(&nodemgr_ne_class); 1894} 1895