2 * Node information (ConfigROM) collection and management.
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
11 #include <linux/bitmap.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/completion.h>
16 #include <linux/delay.h>
17 #include <linux/moduleparam.h>
18 #include <asm/atomic.h>
21 #include "highlevel.h"
24 #include "ieee1394_core.h"
25 #include "ieee1394_hotplug.h"
26 #include "ieee1394_types.h"
27 #include "ieee1394_transactions.h"
30 static int ignore_drivers;
31 module_param(ignore_drivers, int, 0444);
32 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
34 struct nodemgr_csr_info {
35 struct hpsb_host *host;
37 unsigned int generation;
38 unsigned int speed_unverified:1;
42 static char *nodemgr_find_oui_name(int oui)
44 #ifdef CONFIG_IEEE1394_OUI_DB
45 extern struct oui_list_struct {
51 for (i = 0; oui_list[i].name; i++)
52 if (oui_list[i].oui == oui)
53 return oui_list[i].name;
59 * Correct the speed map entry. This is necessary
60 * - for nodes with link speed < phy speed,
61 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
62 * A possible speed is determined by trial and error, using quadlet reads.
64 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
68 u8 i, *speed, old_speed, good_speed;
71 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
73 good_speed = IEEE1394_SPEED_MAX + 1;
75 /* Try every speed from S100 to old_speed.
76 * If we did it the other way around, a too low speed could be caught
77 * if the retry succeeded for some other reason, e.g. because the link
78 * just finished its initialization. */
79 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
81 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
82 &q, sizeof(quadlet_t));
88 if (good_speed <= IEEE1394_SPEED_MAX) {
89 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
90 NODE_BUS_ARGS(ci->host, ci->nodeid),
91 hpsb_speedto_str[good_speed]);
93 ci->speed_unverified = 0;
100 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
101 void *buffer, void *__ci)
103 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
107 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
110 ci->speed_unverified = 0;
113 /* Give up after 3rd failure. */
117 /* The ieee1394_core guessed the node's speed capability from
118 * the self ID. Check whether a lower speed works. */
119 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
120 ret = nodemgr_check_speed(ci, addr, buffer);
124 if (msleep_interruptible(334))
130 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
132 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
135 static struct csr1212_bus_ops nodemgr_csr_ops = {
136 .bus_read = nodemgr_bus_read,
137 .get_max_rom = nodemgr_get_max_rom
142 * Basically what we do here is start off retrieving the bus_info block.
143 * From there will fill in some info about the node, verify it is of IEEE
144 * 1394 type, and that the crc checks out ok. After that we start off with
145 * the root directory, and subdirectories. To do this, we retrieve the
146 * quadlet header for a directory, find out the length, and retrieve the
147 * complete directory entry (be it a leaf or a directory). We then process
148 * it and add the info to our structure for that particular node.
150 * We verify CRC's along the way for each directory/block/leaf. The entire
151 * node structure is generic, and simply stores the information in a way
152 * that's easy to parse by the protocol interface.
156 * The nodemgr relies heavily on the Driver Model for device callbacks and
157 * driver/device mappings. The old nodemgr used to handle all this itself,
158 * but now we are much simpler because of the LDM.
161 static DECLARE_MUTEX(nodemgr_serialize);
164 struct hpsb_host *host;
165 struct list_head list;
166 struct completion exited;
167 struct semaphore reset_sem;
169 char daemon_name[15];
173 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
174 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
175 char *buffer, int buffer_size);
176 static void nodemgr_resume_ne(struct node_entry *ne);
177 static void nodemgr_remove_ne(struct node_entry *ne);
178 static struct node_entry *find_entry_by_guid(u64 guid);
180 struct bus_type ieee1394_bus_type = {
182 .match = nodemgr_bus_match,
185 static void host_cls_release(struct class_device *class_dev)
187 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
190 struct class hpsb_host_class = {
191 .name = "ieee1394_host",
192 .release = host_cls_release,
195 static void ne_cls_release(struct class_device *class_dev)
197 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
200 static struct class nodemgr_ne_class = {
201 .name = "ieee1394_node",
202 .release = ne_cls_release,
205 static void ud_cls_release(struct class_device *class_dev)
207 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
210 /* The name here is only so that unit directory hotplug works with old
211 * style hotplug, which only ever did unit directories anyway. */
212 static struct class nodemgr_ud_class = {
214 .release = ud_cls_release,
215 .uevent = nodemgr_uevent,
218 static struct hpsb_highlevel nodemgr_highlevel;
221 static void nodemgr_release_ud(struct device *dev)
223 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
225 if (ud->vendor_name_kv)
226 csr1212_release_keyval(ud->vendor_name_kv);
227 if (ud->model_name_kv)
228 csr1212_release_keyval(ud->model_name_kv);
233 static void nodemgr_release_ne(struct device *dev)
235 struct node_entry *ne = container_of(dev, struct node_entry, device);
237 if (ne->vendor_name_kv)
238 csr1212_release_keyval(ne->vendor_name_kv);
244 static void nodemgr_release_host(struct device *dev)
246 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
248 csr1212_destroy_csr(host->csr.rom);
253 static int nodemgr_ud_platform_data;
255 static struct device nodemgr_dev_template_ud = {
256 .bus = &ieee1394_bus_type,
257 .release = nodemgr_release_ud,
258 .platform_data = &nodemgr_ud_platform_data,
261 static struct device nodemgr_dev_template_ne = {
262 .bus = &ieee1394_bus_type,
263 .release = nodemgr_release_ne,
266 struct device nodemgr_dev_template_host = {
267 .bus = &ieee1394_bus_type,
268 .release = nodemgr_release_host,
272 #define fw_attr(class, class_type, field, type, format_string) \
273 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
276 class = container_of(dev, class_type, device); \
277 return sprintf(buf, format_string, (type)class->field); \
279 static struct device_attribute dev_attr_##class##_##field = { \
280 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
281 .show = fw_show_##class##_##field, \
284 #define fw_attr_td(class, class_type, td_kv) \
285 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
288 class_type *class = container_of(dev, class_type, device); \
289 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
291 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
293 while ((buf + len - 1) == '\0') \
299 static struct device_attribute dev_attr_##class##_##td_kv = { \
300 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
301 .show = fw_show_##class##_##td_kv, \
305 #define fw_drv_attr(field, type, format_string) \
306 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
308 struct hpsb_protocol_driver *driver; \
309 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
310 return sprintf(buf, format_string, (type)driver->field);\
312 static struct driver_attribute driver_attr_drv_##field = { \
313 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
314 .show = fw_drv_show_##field, \
318 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
320 struct node_entry *ne = container_of(dev, struct node_entry, device);
322 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
323 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
325 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
326 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
329 ne->busopt.cyc_clk_acc);
331 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
334 /* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically
335 * here, therefore displayed values may be occasionally wrong. */
336 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
338 struct node_entry *ne = container_of(dev, struct node_entry, device);
339 return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64));
341 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
344 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
346 struct node_entry *ne = container_of(dev, struct node_entry, device);
347 return sprintf(buf, "%u\n", ne->tpool->allocations);
349 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
352 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
354 struct node_entry *ne = container_of(dev, struct node_entry, device);
355 #if (BITS_PER_LONG <= 32)
356 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
358 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
361 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
364 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
366 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
367 int state = simple_strtoul(buf, NULL, 10);
370 down_write(&dev->bus->subsys.rwsem);
371 device_release_driver(dev);
372 ud->ignore_driver = 1;
373 up_write(&dev->bus->subsys.rwsem);
375 ud->ignore_driver = 0;
379 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
381 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
383 return sprintf(buf, "%d\n", ud->ignore_driver);
385 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
388 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
390 struct node_entry *ne;
391 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
393 ne = find_entry_by_guid(guid);
395 if (ne == NULL || !ne->in_limbo)
398 nodemgr_remove_ne(ne);
402 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
404 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
406 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
408 static int nodemgr_rescan_bus_thread(void *__unused)
410 /* No userlevel access needed */
411 daemonize("kfwrescan");
413 bus_rescan_devices(&ieee1394_bus_type);
418 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
420 int state = simple_strtoul(buf, NULL, 10);
422 /* Don't wait for this, or care about errors. Root could do
423 * something stupid and spawn this a lot of times, but that's
426 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
430 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
432 return sprintf(buf, "You can force a rescan of the bus for "
433 "drivers by writing a 1 to this file\n");
435 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
438 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
440 int state = simple_strtoul(buf, NULL, 10);
449 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
451 return sprintf(buf, "%d\n", ignore_drivers);
453 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
456 struct bus_attribute *const fw_bus_attrs[] = {
457 &bus_attr_destroy_node,
459 &bus_attr_ignore_drivers,
464 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
465 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
467 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
468 fw_attr_td(ne, struct node_entry, vendor_name_kv)
469 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
471 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
472 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
473 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
474 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
476 static struct device_attribute *const fw_ne_attrs[] = {
478 &dev_attr_ne_guid_vendor_id,
479 &dev_attr_ne_capabilities,
480 &dev_attr_ne_vendor_id,
482 &dev_attr_bus_options,
483 &dev_attr_tlabels_free,
484 &dev_attr_tlabels_allocations,
485 &dev_attr_tlabels_mask,
490 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
491 fw_attr(ud, struct unit_directory, length, int, "%d\n")
492 /* These are all dependent on the value being provided */
493 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
494 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
495 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
496 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
497 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
498 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
499 fw_attr_td(ud, struct unit_directory, model_name_kv)
501 static struct device_attribute *const fw_ud_attrs[] = {
502 &dev_attr_ud_address,
504 &dev_attr_ignore_driver,
508 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
509 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
510 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
511 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
512 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
513 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
514 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
515 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
517 static struct device_attribute *const fw_host_attrs[] = {
518 &dev_attr_host_node_count,
519 &dev_attr_host_selfid_count,
520 &dev_attr_host_nodes_active,
521 &dev_attr_host_in_bus_reset,
522 &dev_attr_host_is_root,
523 &dev_attr_host_is_cycmst,
524 &dev_attr_host_is_irm,
525 &dev_attr_host_is_busmgr,
529 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
531 struct hpsb_protocol_driver *driver;
532 struct ieee1394_device_id *id;
536 driver = container_of(drv, struct hpsb_protocol_driver, driver);
538 for (id = driver->id_table; id->match_flags != 0; id++) {
541 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
542 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
543 scratch = buf + length;
547 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
548 length += sprintf(scratch, "%smodel_id=0x%06x",
549 need_coma++ ? "," : "",
551 scratch = buf + length;
554 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
555 length += sprintf(scratch, "%sspecifier_id=0x%06x",
556 need_coma++ ? "," : "",
558 scratch = buf + length;
561 if (id->match_flags & IEEE1394_MATCH_VERSION) {
562 length += sprintf(scratch, "%sversion=0x%06x",
563 need_coma++ ? "," : "",
565 scratch = buf + length;
576 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
579 fw_drv_attr(name, const char *, "%s\n")
581 static struct driver_attribute *const fw_drv_attrs[] = {
582 &driver_attr_drv_name,
583 &driver_attr_device_ids,
587 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
589 struct device_driver *drv = &driver->driver;
592 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
593 driver_create_file(drv, fw_drv_attrs[i]);
597 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
599 struct device_driver *drv = &driver->driver;
602 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
603 driver_remove_file(drv, fw_drv_attrs[i]);
607 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
609 struct device *dev = &ne->device;
612 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
613 device_create_file(dev, fw_ne_attrs[i]);
617 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
619 struct device *dev = &host->device;
622 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
623 device_create_file(dev, fw_host_attrs[i]);
627 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
629 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
631 struct device *dev = &host->device;
632 struct node_entry *ne;
634 sysfs_remove_link(&dev->kobj, "irm_id");
635 sysfs_remove_link(&dev->kobj, "busmgr_id");
636 sysfs_remove_link(&dev->kobj, "host_id");
638 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
639 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
640 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
641 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
642 if ((ne = find_entry_by_nodeid(host, host->node_id)))
643 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
646 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
648 struct device *dev = &ud->device;
651 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
652 device_create_file(dev, fw_ud_attrs[i]);
654 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
655 device_create_file(dev, &dev_attr_ud_specifier_id);
657 if (ud->flags & UNIT_DIRECTORY_VERSION)
658 device_create_file(dev, &dev_attr_ud_version);
660 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
661 device_create_file(dev, &dev_attr_ud_vendor_id);
662 if (ud->vendor_name_kv)
663 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
666 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
667 device_create_file(dev, &dev_attr_ud_model_id);
668 if (ud->model_name_kv)
669 device_create_file(dev, &dev_attr_ud_model_name_kv);
674 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
676 struct hpsb_protocol_driver *driver;
677 struct unit_directory *ud;
678 struct ieee1394_device_id *id;
680 /* We only match unit directories */
681 if (dev->platform_data != &nodemgr_ud_platform_data)
684 ud = container_of(dev, struct unit_directory, device);
685 driver = container_of(drv, struct hpsb_protocol_driver, driver);
687 if (ud->ne->in_limbo || ud->ignore_driver)
690 for (id = driver->id_table; id->match_flags != 0; id++) {
691 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
692 id->vendor_id != ud->vendor_id)
695 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
696 id->model_id != ud->model_id)
699 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
700 id->specifier_id != ud->specifier_id)
703 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
704 id->version != ud->version)
714 static void nodemgr_remove_uds(struct node_entry *ne)
716 struct class_device *cdev, *next;
717 struct unit_directory *ud;
719 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
720 ud = container_of(cdev, struct unit_directory, class_dev);
725 class_device_unregister(&ud->class_dev);
726 device_unregister(&ud->device);
731 static void nodemgr_remove_ne(struct node_entry *ne)
733 struct device *dev = &ne->device;
735 dev = get_device(&ne->device);
739 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
740 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
742 nodemgr_remove_uds(ne);
744 class_device_unregister(&ne->class_dev);
745 device_unregister(dev);
750 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
752 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
756 static void nodemgr_remove_host_dev(struct device *dev)
758 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
759 sysfs_remove_link(&dev->kobj, "irm_id");
760 sysfs_remove_link(&dev->kobj, "busmgr_id");
761 sysfs_remove_link(&dev->kobj, "host_id");
765 static void nodemgr_update_bus_options(struct node_entry *ne)
767 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
768 static const u16 mr[] = { 4, 64, 1024, 0};
770 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
772 ne->busopt.irmc = (busoptions >> 31) & 1;
773 ne->busopt.cmc = (busoptions >> 30) & 1;
774 ne->busopt.isc = (busoptions >> 29) & 1;
775 ne->busopt.bmc = (busoptions >> 28) & 1;
776 ne->busopt.pmc = (busoptions >> 27) & 1;
777 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
778 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
779 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
780 ne->busopt.generation = (busoptions >> 4) & 0xf;
781 ne->busopt.lnkspd = busoptions & 0x7;
783 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
784 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
785 busoptions, ne->busopt.irmc, ne->busopt.cmc,
786 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
787 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
788 mr[ne->busopt.max_rom],
789 ne->busopt.generation, ne->busopt.lnkspd);
793 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
794 struct host_info *hi, nodeid_t nodeid,
795 unsigned int generation)
797 struct hpsb_host *host = hi->host;
798 struct node_entry *ne;
800 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
804 ne->tpool = &host->tpool[nodeid & NODE_MASK];
808 ne->generation = generation;
812 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
813 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
816 memcpy(&ne->device, &nodemgr_dev_template_ne,
818 ne->device.parent = &host->device;
819 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
820 (unsigned long long)(ne->guid));
822 ne->class_dev.dev = &ne->device;
823 ne->class_dev.class = &nodemgr_ne_class;
824 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
825 (unsigned long long)(ne->guid));
827 device_register(&ne->device);
828 class_device_register(&ne->class_dev);
829 get_device(&ne->device);
831 if (ne->guid_vendor_oui)
832 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
833 nodemgr_create_ne_dev_files(ne);
835 nodemgr_update_bus_options(ne);
837 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
838 (host->node_id == nodeid) ? "Host" : "Node",
839 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
845 static struct node_entry *find_entry_by_guid(u64 guid)
847 struct class *class = &nodemgr_ne_class;
848 struct class_device *cdev;
849 struct node_entry *ne, *ret_ne = NULL;
851 down_read(&class->subsys.rwsem);
852 list_for_each_entry(cdev, &class->children, node) {
853 ne = container_of(cdev, struct node_entry, class_dev);
855 if (ne->guid == guid) {
860 up_read(&class->subsys.rwsem);
866 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
868 struct class *class = &nodemgr_ne_class;
869 struct class_device *cdev;
870 struct node_entry *ne, *ret_ne = NULL;
872 down_read(&class->subsys.rwsem);
873 list_for_each_entry(cdev, &class->children, node) {
874 ne = container_of(cdev, struct node_entry, class_dev);
876 if (ne->host == host && ne->nodeid == nodeid) {
881 up_read(&class->subsys.rwsem);
887 static void nodemgr_register_device(struct node_entry *ne,
888 struct unit_directory *ud, struct device *parent)
890 memcpy(&ud->device, &nodemgr_dev_template_ud,
893 ud->device.parent = parent;
895 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
896 ne->device.bus_id, ud->id);
898 ud->class_dev.dev = &ud->device;
899 ud->class_dev.class = &nodemgr_ud_class;
900 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
901 ne->device.bus_id, ud->id);
903 device_register(&ud->device);
904 class_device_register(&ud->class_dev);
905 get_device(&ud->device);
908 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
909 nodemgr_create_ud_dev_files(ud);
913 /* This implementation currently only scans the config rom and its
914 * immediate unit directories looking for software_id and
915 * software_version entries, in order to get driver autoloading working. */
916 static struct unit_directory *nodemgr_process_unit_directory
917 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
918 unsigned int *id, struct unit_directory *parent)
920 struct unit_directory *ud;
921 struct unit_directory *ud_child = NULL;
922 struct csr1212_dentry *dentry;
923 struct csr1212_keyval *kv;
926 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
928 goto unit_directory_error;
931 ud->ignore_driver = ignore_drivers;
932 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
936 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
937 switch (kv->key.id) {
938 case CSR1212_KV_ID_VENDOR:
939 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
940 ud->vendor_id = kv->value.immediate;
941 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
944 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
948 case CSR1212_KV_ID_MODEL:
949 ud->model_id = kv->value.immediate;
950 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
953 case CSR1212_KV_ID_SPECIFIER_ID:
954 ud->specifier_id = kv->value.immediate;
955 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
958 case CSR1212_KV_ID_VERSION:
959 ud->version = kv->value.immediate;
960 ud->flags |= UNIT_DIRECTORY_VERSION;
963 case CSR1212_KV_ID_DESCRIPTOR:
964 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
965 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
966 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
967 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
968 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
969 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
970 switch (last_key_id) {
971 case CSR1212_KV_ID_VENDOR:
972 ud->vendor_name_kv = kv;
973 csr1212_keep_keyval(kv);
976 case CSR1212_KV_ID_MODEL:
977 ud->model_name_kv = kv;
978 csr1212_keep_keyval(kv);
982 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
985 case CSR1212_KV_ID_DEPENDENT_INFO:
986 /* Logical Unit Number */
987 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
988 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
989 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
991 goto unit_directory_error;
992 memcpy(ud_child, ud, sizeof(*ud_child));
993 nodemgr_register_device(ne, ud_child, &ne->device);
998 ud->lun = kv->value.immediate;
999 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1001 /* Logical Unit Directory */
1002 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1003 /* This should really be done in SBP2 as this is
1004 * doing SBP2 specific parsing.
1007 /* first register the parent unit */
1008 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1009 if (ud->device.bus != &ieee1394_bus_type)
1010 nodemgr_register_device(ne, ud, &ne->device);
1012 /* process the child unit */
1013 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1015 if (ud_child == NULL)
1018 /* inherit unspecified values, the driver core picks it up */
1019 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1020 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1022 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1023 ud_child->model_id = ud->model_id;
1025 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1026 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1028 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1029 ud_child->specifier_id = ud->specifier_id;
1031 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1032 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1034 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1035 ud_child->version = ud->version;
1038 /* register the child unit */
1039 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1040 nodemgr_register_device(ne, ud_child, &ud->device);
1048 last_key_id = kv->key.id;
1051 /* do not process child units here and only if not already registered */
1052 if (!parent && ud->device.bus != &ieee1394_bus_type)
1053 nodemgr_register_device(ne, ud, &ne->device);
1057 unit_directory_error:
1063 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1065 unsigned int ud_id = 0;
1066 struct csr1212_dentry *dentry;
1067 struct csr1212_keyval *kv;
1070 ne->needs_probe = 0;
1072 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1073 switch (kv->key.id) {
1074 case CSR1212_KV_ID_VENDOR:
1075 ne->vendor_id = kv->value.immediate;
1078 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1081 case CSR1212_KV_ID_NODE_CAPABILITIES:
1082 ne->capabilities = kv->value.immediate;
1085 case CSR1212_KV_ID_UNIT:
1086 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1089 case CSR1212_KV_ID_DESCRIPTOR:
1090 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1091 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1092 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1093 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1094 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1095 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1096 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1097 ne->vendor_name_kv = kv;
1098 csr1212_keep_keyval(kv);
1103 last_key_id = kv->key.id;
1107 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1108 if (ne->vendor_name_kv)
1109 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1112 #ifdef CONFIG_HOTPLUG
1114 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1115 char *buffer, int buffer_size)
1117 struct unit_directory *ud;
1120 /* ieee1394:venNmoNspNverN */
1121 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1126 ud = container_of(cdev, struct unit_directory, class_dev);
1128 if (ud->ne->in_limbo || ud->ignore_driver)
1131 #define PUT_ENVP(fmt,val) \
1134 envp[i++] = buffer; \
1135 printed = snprintf(buffer, buffer_size - length, \
1137 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1139 length += printed+1; \
1140 buffer += printed+1; \
1143 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1144 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1145 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1146 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1147 PUT_ENVP("VERSION=%06x", ud->version);
1148 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1153 PUT_ENVP("MODALIAS=%s", buf);
1164 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1165 char *buffer, int buffer_size)
1170 #endif /* CONFIG_HOTPLUG */
1173 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1177 /* This will cause a probe for devices */
1178 ret = driver_register(&driver->driver);
1180 nodemgr_create_drv_files(driver);
1185 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1187 nodemgr_remove_drv_files(driver);
1188 /* This will subsequently disconnect all devices that our driver
1189 * is attached to. */
1190 driver_unregister(&driver->driver);
1195 * This function updates nodes that were present on the bus before the
1196 * reset and still are after the reset. The nodeid and the config rom
1197 * may have changed, and the drivers managing this device must be
1198 * informed that this device just went through a bus reset, to allow
1199 * the to take whatever actions required.
1201 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1202 struct host_info *hi, nodeid_t nodeid,
1203 unsigned int generation)
1205 if (ne->nodeid != nodeid) {
1206 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1207 NODE_BUS_ARGS(ne->host, ne->nodeid),
1208 NODE_BUS_ARGS(ne->host, nodeid));
1209 ne->nodeid = nodeid;
1212 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1213 kfree(ne->csr->private);
1214 csr1212_destroy_csr(ne->csr);
1217 /* If the node's configrom generation has changed, we
1218 * unregister all the unit directories. */
1219 nodemgr_remove_uds(ne);
1221 nodemgr_update_bus_options(ne);
1223 /* Mark the node as new, so it gets re-probed */
1224 ne->needs_probe = 1;
1226 /* old cache is valid, so update its generation */
1227 struct nodemgr_csr_info *ci = ne->csr->private;
1228 ci->generation = generation;
1229 /* free the partially filled now unneeded new cache */
1230 kfree(csr->private);
1231 csr1212_destroy_csr(csr);
1235 nodemgr_resume_ne(ne);
1237 /* Mark the node current */
1238 ne->generation = generation;
1243 static void nodemgr_node_scan_one(struct host_info *hi,
1244 nodeid_t nodeid, int generation)
1246 struct hpsb_host *host = hi->host;
1247 struct node_entry *ne;
1249 struct csr1212_csr *csr;
1250 struct nodemgr_csr_info *ci;
1253 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1258 ci->nodeid = nodeid;
1259 ci->generation = generation;
1261 /* Prepare for speed probe which occurs when reading the ROM */
1262 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1263 if (*speed > host->csr.lnk_spd)
1264 *speed = host->csr.lnk_spd;
1265 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1267 /* We need to detect when the ConfigROM's generation has changed,
1268 * so we only update the node's info when it needs to be. */
1270 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1271 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1272 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1273 NODE_BUS_ARGS(host, nodeid));
1275 csr1212_destroy_csr(csr);
1280 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1281 /* This isn't a 1394 device, but we let it slide. There
1282 * was a report of a device with broken firmware which
1283 * reported '2394' instead of '1394', which is obviously a
1284 * mistake. One would hope that a non-1394 device never
1285 * gets connected to Firewire bus. If someone does, we
1286 * shouldn't be held responsible, so we'll allow it with a
1288 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1289 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1292 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1293 ne = find_entry_by_guid(guid);
1295 if (ne && ne->host != host && ne->in_limbo) {
1296 /* Must have moved this device from one host to another */
1297 nodemgr_remove_ne(ne);
1302 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1304 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1308 static void nodemgr_node_scan(struct host_info *hi, int generation)
1311 struct hpsb_host *host = hi->host;
1312 struct selfid *sid = (struct selfid *)host->topology_map;
1313 nodeid_t nodeid = LOCAL_BUS;
1315 /* Scan each node on the bus */
1316 for (count = host->selfid_count; count; count--, sid++) {
1320 if (!sid->link_active) {
1324 nodemgr_node_scan_one(hi, nodeid++, generation);
1329 static void nodemgr_suspend_ne(struct node_entry *ne)
1331 struct class_device *cdev;
1332 struct unit_directory *ud;
1334 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1335 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1338 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1340 down_write(&ne->device.bus->subsys.rwsem);
1341 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1342 ud = container_of(cdev, struct unit_directory, class_dev);
1347 if (ud->device.driver &&
1348 (!ud->device.driver->suspend ||
1349 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1350 device_release_driver(&ud->device);
1352 up_write(&ne->device.bus->subsys.rwsem);
1356 static void nodemgr_resume_ne(struct node_entry *ne)
1358 struct class_device *cdev;
1359 struct unit_directory *ud;
1362 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1364 down_read(&ne->device.bus->subsys.rwsem);
1365 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1366 ud = container_of(cdev, struct unit_directory, class_dev);
1371 if (ud->device.driver && ud->device.driver->resume)
1372 ud->device.driver->resume(&ud->device);
1374 up_read(&ne->device.bus->subsys.rwsem);
1376 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1377 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1381 static void nodemgr_update_pdrv(struct node_entry *ne)
1383 struct unit_directory *ud;
1384 struct hpsb_protocol_driver *pdrv;
1385 struct class *class = &nodemgr_ud_class;
1386 struct class_device *cdev;
1388 down_read(&class->subsys.rwsem);
1389 list_for_each_entry(cdev, &class->children, node) {
1390 ud = container_of(cdev, struct unit_directory, class_dev);
1391 if (ud->ne != ne || !ud->device.driver)
1394 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1396 if (pdrv->update && pdrv->update(ud)) {
1397 down_write(&ud->device.bus->subsys.rwsem);
1398 device_release_driver(&ud->device);
1399 up_write(&ud->device.bus->subsys.rwsem);
1402 up_read(&class->subsys.rwsem);
1406 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1407 * seems like an optional service but in the end it is practically mandatory
1408 * as a consequence of these clauses.
1410 * Note that we cannot do a broadcast write to all nodes at once because some
1411 * pre-1394a devices would hang. */
1412 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1414 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1415 quadlet_t bc_remote, bc_local;
1418 if (!ne->host->is_irm || ne->generation != generation ||
1419 ne->nodeid == ne->host->node_id)
1422 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1424 /* Check if the register is implemented and 1394a compliant. */
1425 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1427 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1428 bc_remote != bc_local)
1429 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1433 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1437 if (ne->host != hi->host || ne->in_limbo)
1440 dev = get_device(&ne->device);
1444 nodemgr_irm_write_bc(ne, generation);
1446 /* If "needs_probe", then this is either a new or changed node we
1447 * rescan totally. If the generation matches for an existing node
1448 * (one that existed prior to the bus reset) we send update calls
1449 * down to the drivers. Otherwise, this is a dead node and we
1451 if (ne->needs_probe)
1452 nodemgr_process_root_directory(hi, ne);
1453 else if (ne->generation == generation)
1454 nodemgr_update_pdrv(ne);
1456 nodemgr_suspend_ne(ne);
1462 static void nodemgr_node_probe(struct host_info *hi, int generation)
1464 struct hpsb_host *host = hi->host;
1465 struct class *class = &nodemgr_ne_class;
1466 struct class_device *cdev;
1467 struct node_entry *ne;
1469 /* Do some processing of the nodes we've probed. This pulls them
1470 * into the sysfs layer if needed, and can result in processing of
1471 * unit-directories, or just updating the node and it's
1474 * Run updates before probes. Usually, updates are time-critical
1475 * while probes are time-consuming. (Well, those probes need some
1476 * improvement...) */
1478 down_read(&class->subsys.rwsem);
1479 list_for_each_entry(cdev, &class->children, node) {
1480 ne = container_of(cdev, struct node_entry, class_dev);
1481 if (!ne->needs_probe)
1482 nodemgr_probe_ne(hi, ne, generation);
1484 list_for_each_entry(cdev, &class->children, node) {
1485 ne = container_of(cdev, struct node_entry, class_dev);
1486 if (ne->needs_probe)
1487 nodemgr_probe_ne(hi, ne, generation);
1489 up_read(&class->subsys.rwsem);
1492 /* If we had a bus reset while we were scanning the bus, it is
1493 * possible that we did not probe all nodes. In that case, we
1494 * skip the clean up for now, since we could remove nodes that
1495 * were still on the bus. The bus reset increased hi->reset_sem,
1496 * so there's a bus scan pending which will do the clean up
1499 * Now let's tell the bus to rescan our devices. This may seem
1500 * like overhead, but the driver-model core will only scan a
1501 * device for a driver when either the device is added, or when a
1502 * new driver is added. A bus reset is a good reason to rescan
1503 * devices that were there before. For example, an sbp2 device
1504 * may become available for login, if the host that held it was
1507 if (generation == get_hpsb_generation(host))
1508 bus_rescan_devices(&ieee1394_bus_type);
1513 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1515 struct hpsb_packet *packet;
1518 packet = hpsb_make_phypacket(host,
1519 EXTPHYPACKET_TYPE_RESUME |
1520 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1522 packet->no_waiter = 1;
1523 packet->generation = get_hpsb_generation(host);
1524 ret = hpsb_send_packet(packet);
1527 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1532 /* Perform a few high-level IRM responsibilities. */
1533 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1537 /* if irm_id == -1 then there is no IRM on this bus */
1538 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1541 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1542 host->csr.broadcast_channel |= 0x40000000;
1544 /* If there is no bus manager then we should set the root node's
1545 * force_root bit to promote bus stability per the 1394
1546 * spec. (8.4.2.6) */
1547 if (host->busmgr_id == 0xffff && host->node_count > 1)
1549 u16 root_node = host->node_count - 1;
1551 /* get cycle master capability flag from root node */
1552 if (host->is_cycmst ||
1553 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1554 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1555 &bc, sizeof(quadlet_t)) &&
1556 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1557 hpsb_send_phy_config(host, root_node, -1);
1559 HPSB_DEBUG("The root node is not cycle master capable; "
1560 "selecting a new root node and resetting...");
1563 /* Oh screw it! Just leave the bus as it is */
1564 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1568 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1569 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1575 /* Some devices suspend their ports while being connected to an inactive
1576 * host adapter, i.e. if connected before the low-level driver is
1577 * loaded. They become visible either when physically unplugged and
1578 * replugged, or when receiving a resume packet. Send one once. */
1579 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1580 host->resume_packet_sent = 1;
1585 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1586 * everything we can do, otherwise issue a bus reset and try to become the IRM
1588 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1593 if (hpsb_disable_irm || host->is_irm)
1596 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1597 get_hpsb_generation(host),
1598 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1599 &bc, sizeof(quadlet_t));
1601 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1602 /* The current irm node does not have a valid BROADCAST_CHANNEL
1603 * register and we do, so reset the bus with force_root set */
1604 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1607 /* Oh screw it! Just leave the bus as it is */
1608 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1612 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1613 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1621 static int nodemgr_host_thread(void *__hi)
1623 struct host_info *hi = (struct host_info *)__hi;
1624 struct hpsb_host *host = hi->host;
1625 int reset_cycles = 0;
1627 /* No userlevel access needed */
1628 daemonize(hi->daemon_name);
1630 /* Setup our device-model entries */
1631 nodemgr_create_host_dev_files(host);
1633 /* Sit and wait for a signal to probe the nodes on the bus. This
1634 * happens when we get a bus reset. */
1636 unsigned int generation = 0;
1639 if (down_interruptible(&hi->reset_sem) ||
1640 down_interruptible(&nodemgr_serialize)) {
1641 if (try_to_freeze())
1643 printk("NodeMgr: received unexpected signal?!\n" );
1648 up(&nodemgr_serialize);
1652 /* Pause for 1/4 second in 1/16 second intervals,
1653 * to make sure things settle down. */
1654 for (i = 0; i < 4 ; i++) {
1655 set_current_state(TASK_INTERRUPTIBLE);
1656 if (msleep_interruptible(63)) {
1657 up(&nodemgr_serialize);
1661 /* Now get the generation in which the node ID's we collect
1662 * are valid. During the bus scan we will use this generation
1663 * for the read transactions, so that if another reset occurs
1664 * during the scan the transactions will fail instead of
1665 * returning bogus data. */
1666 generation = get_hpsb_generation(host);
1668 /* If we get a reset before we are done waiting, then
1669 * start the the waiting over again */
1670 while (!down_trylock(&hi->reset_sem))
1673 /* Check the kill_me again */
1675 up(&nodemgr_serialize);
1680 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1681 !nodemgr_do_irm_duties(host, reset_cycles)) {
1683 up(&nodemgr_serialize);
1688 /* Scan our nodes to get the bus options and create node
1689 * entries. This does not do the sysfs stuff, since that
1690 * would trigger uevents and such, which is a bad idea at
1692 nodemgr_node_scan(hi, generation);
1694 /* This actually does the full probe, with sysfs
1696 nodemgr_node_probe(hi, generation);
1698 /* Update some of our sysfs symlinks */
1699 nodemgr_update_host_dev_links(host);
1701 up(&nodemgr_serialize);
1705 HPSB_VERBOSE("NodeMgr: Exiting thread");
1707 complete_and_exit(&hi->exited, 0);
1710 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1712 struct class *class = &hpsb_host_class;
1713 struct class_device *cdev;
1714 struct hpsb_host *host;
1717 down_read(&class->subsys.rwsem);
1718 list_for_each_entry(cdev, &class->children, node) {
1719 host = container_of(cdev, struct hpsb_host, class_dev);
1721 if ((error = cb(host, __data)))
1724 up_read(&class->subsys.rwsem);
1729 /* The following four convenience functions use a struct node_entry
1730 * for addressing a node on the bus. They are intended for use by any
1731 * process context, not just the nodemgr thread, so we need to be a
1732 * little careful when reading out the node ID and generation. The
1733 * thing that can go wrong is that we get the node ID, then a bus
1734 * reset occurs, and then we read the generation. The node ID is
1735 * possibly invalid, but the generation is current, and we end up
1736 * sending a packet to a the wrong node.
1738 * The solution is to make sure we read the generation first, so that
1739 * if a reset occurs in the process, we end up with a stale generation
1740 * and the transactions will fail instead of silently using wrong node
1744 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1746 pkt->host = ne->host;
1747 pkt->generation = ne->generation;
1749 pkt->node_id = ne->nodeid;
1752 int hpsb_node_write(struct node_entry *ne, u64 addr,
1753 quadlet_t *buffer, size_t length)
1755 unsigned int generation = ne->generation;
1758 return hpsb_write(ne->host, ne->nodeid, generation,
1759 addr, buffer, length);
1762 static void nodemgr_add_host(struct hpsb_host *host)
1764 struct host_info *hi;
1766 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1769 HPSB_ERR ("NodeMgr: out of memory in add host");
1774 init_completion(&hi->exited);
1775 sema_init(&hi->reset_sem, 0);
1777 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1779 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1782 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1783 hi->daemon_name, host->driver->name);
1784 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1791 static void nodemgr_host_reset(struct hpsb_host *host)
1793 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1796 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1799 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1804 static void nodemgr_remove_host(struct hpsb_host *host)
1806 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1813 wait_for_completion(&hi->exited);
1814 nodemgr_remove_host_dev(&host->device);
1817 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1818 host->driver->name);
1823 static struct hpsb_highlevel nodemgr_highlevel = {
1824 .name = "Node manager",
1825 .add_host = nodemgr_add_host,
1826 .host_reset = nodemgr_host_reset,
1827 .remove_host = nodemgr_remove_host,
1830 int init_ieee1394_nodemgr(void)
1834 ret = class_register(&nodemgr_ne_class);
1838 ret = class_register(&nodemgr_ud_class);
1840 class_unregister(&nodemgr_ne_class);
1844 hpsb_register_highlevel(&nodemgr_highlevel);
1849 void cleanup_ieee1394_nodemgr(void)
1851 hpsb_unregister_highlevel(&nodemgr_highlevel);
1853 class_unregister(&nodemgr_ud_class);
1854 class_unregister(&nodemgr_ne_class);