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/delay.h>
16 #include <linux/kthread.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/freezer.h>
20 #include <asm/atomic.h>
23 #include "highlevel.h"
26 #include "ieee1394_core.h"
27 #include "ieee1394_hotplug.h"
28 #include "ieee1394_types.h"
29 #include "ieee1394_transactions.h"
32 static int ignore_drivers;
33 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
36 struct nodemgr_csr_info {
37 struct hpsb_host *host;
39 unsigned int generation;
40 unsigned int speed_unverified:1;
45 * Correct the speed map entry. This is necessary
46 * - for nodes with link speed < phy speed,
47 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
48 * A possible speed is determined by trial and error, using quadlet reads.
50 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
54 u8 i, *speed, old_speed, good_speed;
57 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
59 good_speed = IEEE1394_SPEED_MAX + 1;
61 /* Try every speed from S100 to old_speed.
62 * If we did it the other way around, a too low speed could be caught
63 * if the retry succeeded for some other reason, e.g. because the link
64 * just finished its initialization. */
65 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
67 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
68 &q, sizeof(quadlet_t));
74 if (good_speed <= IEEE1394_SPEED_MAX) {
75 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
76 NODE_BUS_ARGS(ci->host, ci->nodeid),
77 hpsb_speedto_str[good_speed]);
79 ci->speed_unverified = 0;
86 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
87 void *buffer, void *__ci)
89 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
93 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
96 ci->speed_unverified = 0;
99 /* Give up after 3rd failure. */
103 /* The ieee1394_core guessed the node's speed capability from
104 * the self ID. Check whether a lower speed works. */
105 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
106 error = nodemgr_check_speed(ci, addr, buffer);
110 if (msleep_interruptible(334))
116 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
118 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
121 static struct csr1212_bus_ops nodemgr_csr_ops = {
122 .bus_read = nodemgr_bus_read,
123 .get_max_rom = nodemgr_get_max_rom
128 * Basically what we do here is start off retrieving the bus_info block.
129 * From there will fill in some info about the node, verify it is of IEEE
130 * 1394 type, and that the crc checks out ok. After that we start off with
131 * the root directory, and subdirectories. To do this, we retrieve the
132 * quadlet header for a directory, find out the length, and retrieve the
133 * complete directory entry (be it a leaf or a directory). We then process
134 * it and add the info to our structure for that particular node.
136 * We verify CRC's along the way for each directory/block/leaf. The entire
137 * node structure is generic, and simply stores the information in a way
138 * that's easy to parse by the protocol interface.
142 * The nodemgr relies heavily on the Driver Model for device callbacks and
143 * driver/device mappings. The old nodemgr used to handle all this itself,
144 * but now we are much simpler because of the LDM.
147 static DEFINE_MUTEX(nodemgr_serialize);
150 struct hpsb_host *host;
151 struct list_head list;
152 struct task_struct *thread;
155 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
156 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
157 char *buffer, int buffer_size);
158 static void nodemgr_resume_ne(struct node_entry *ne);
159 static void nodemgr_remove_ne(struct node_entry *ne);
160 static struct node_entry *find_entry_by_guid(u64 guid);
162 struct bus_type ieee1394_bus_type = {
164 .match = nodemgr_bus_match,
167 static void host_cls_release(struct class_device *class_dev)
169 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
172 struct class hpsb_host_class = {
173 .name = "ieee1394_host",
174 .release = host_cls_release,
177 static void ne_cls_release(struct class_device *class_dev)
179 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
182 static struct class nodemgr_ne_class = {
183 .name = "ieee1394_node",
184 .release = ne_cls_release,
187 static void ud_cls_release(struct class_device *class_dev)
189 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
192 /* The name here is only so that unit directory hotplug works with old
193 * style hotplug, which only ever did unit directories anyway. */
194 static struct class nodemgr_ud_class = {
196 .release = ud_cls_release,
197 .uevent = nodemgr_uevent,
200 static struct hpsb_highlevel nodemgr_highlevel;
203 static void nodemgr_release_ud(struct device *dev)
205 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
207 if (ud->vendor_name_kv)
208 csr1212_release_keyval(ud->vendor_name_kv);
209 if (ud->model_name_kv)
210 csr1212_release_keyval(ud->model_name_kv);
215 static void nodemgr_release_ne(struct device *dev)
217 struct node_entry *ne = container_of(dev, struct node_entry, device);
219 if (ne->vendor_name_kv)
220 csr1212_release_keyval(ne->vendor_name_kv);
226 static void nodemgr_release_host(struct device *dev)
228 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
230 csr1212_destroy_csr(host->csr.rom);
235 static int nodemgr_ud_platform_data;
237 static struct device nodemgr_dev_template_ud = {
238 .bus = &ieee1394_bus_type,
239 .release = nodemgr_release_ud,
240 .platform_data = &nodemgr_ud_platform_data,
243 static struct device nodemgr_dev_template_ne = {
244 .bus = &ieee1394_bus_type,
245 .release = nodemgr_release_ne,
248 /* This dummy driver prevents the host devices from being scanned. We have no
249 * useful drivers for them yet, and there would be a deadlock possible if the
250 * driver core scans the host device while the host's low-level driver (i.e.
251 * the host's parent device) is being removed. */
252 static struct device_driver nodemgr_mid_layer_driver = {
253 .bus = &ieee1394_bus_type,
255 .owner = THIS_MODULE,
258 struct device nodemgr_dev_template_host = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_host,
264 #define fw_attr(class, class_type, field, type, format_string) \
265 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
268 class = container_of(dev, class_type, device); \
269 return sprintf(buf, format_string, (type)class->field); \
271 static struct device_attribute dev_attr_##class##_##field = { \
272 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
273 .show = fw_show_##class##_##field, \
276 #define fw_attr_td(class, class_type, td_kv) \
277 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
280 class_type *class = container_of(dev, class_type, device); \
281 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
283 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
285 while ((buf + len - 1) == '\0') \
291 static struct device_attribute dev_attr_##class##_##td_kv = { \
292 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
293 .show = fw_show_##class##_##td_kv, \
297 #define fw_drv_attr(field, type, format_string) \
298 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
300 struct hpsb_protocol_driver *driver; \
301 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
302 return sprintf(buf, format_string, (type)driver->field);\
304 static struct driver_attribute driver_attr_drv_##field = { \
305 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
306 .show = fw_drv_show_##field, \
310 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
312 struct node_entry *ne = container_of(dev, struct node_entry, device);
314 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
315 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
317 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
318 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
321 ne->busopt.cyc_clk_acc);
323 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
326 #ifdef HPSB_DEBUG_TLABELS
327 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
328 struct device_attribute *attr, char *buf)
330 struct node_entry *ne = container_of(dev, struct node_entry, device);
332 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
335 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
336 tf = 64 - bitmap_weight(tp, 64);
337 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
339 return sprintf(buf, "%d\n", tf);
341 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
344 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
345 struct device_attribute *attr, char *buf)
347 struct node_entry *ne = container_of(dev, struct node_entry, device);
349 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
352 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
353 #if (BITS_PER_LONG <= 32)
354 tm = ((u64)tp[0] << 32) + tp[1];
358 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
360 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
362 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
363 #endif /* HPSB_DEBUG_TLABELS */
366 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
368 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
369 int state = simple_strtoul(buf, NULL, 10);
372 ud->ignore_driver = 1;
373 device_release_driver(dev);
374 } else if (state == 0)
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);
409 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
414 if (simple_strtoul(buf, NULL, 10) == 1)
415 error = bus_rescan_devices(&ieee1394_bus_type);
416 return error ? error : count;
418 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
420 return sprintf(buf, "You can force a rescan of the bus for "
421 "drivers by writing a 1 to this file\n");
423 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
426 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
428 int state = simple_strtoul(buf, NULL, 10);
437 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
439 return sprintf(buf, "%d\n", ignore_drivers);
441 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
444 struct bus_attribute *const fw_bus_attrs[] = {
445 &bus_attr_destroy_node,
447 &bus_attr_ignore_drivers,
452 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
453 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
455 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
456 fw_attr_td(ne, struct node_entry, vendor_name_kv)
458 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
459 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
460 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
462 static struct device_attribute *const fw_ne_attrs[] = {
464 &dev_attr_ne_guid_vendor_id,
465 &dev_attr_ne_capabilities,
466 &dev_attr_ne_vendor_id,
468 &dev_attr_bus_options,
469 #ifdef HPSB_DEBUG_TLABELS
470 &dev_attr_tlabels_free,
471 &dev_attr_tlabels_mask,
477 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
478 fw_attr(ud, struct unit_directory, length, int, "%d\n")
479 /* These are all dependent on the value being provided */
480 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
481 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
482 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
483 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
484 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
485 fw_attr_td(ud, struct unit_directory, model_name_kv)
487 static struct device_attribute *const fw_ud_attrs[] = {
488 &dev_attr_ud_address,
490 &dev_attr_ignore_driver,
494 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
495 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
496 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
497 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
498 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
499 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
500 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
501 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
503 static struct device_attribute *const fw_host_attrs[] = {
504 &dev_attr_host_node_count,
505 &dev_attr_host_selfid_count,
506 &dev_attr_host_nodes_active,
507 &dev_attr_host_in_bus_reset,
508 &dev_attr_host_is_root,
509 &dev_attr_host_is_cycmst,
510 &dev_attr_host_is_irm,
511 &dev_attr_host_is_busmgr,
515 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
517 struct hpsb_protocol_driver *driver;
518 struct ieee1394_device_id *id;
522 driver = container_of(drv, struct hpsb_protocol_driver, driver);
524 for (id = driver->id_table; id->match_flags != 0; id++) {
527 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
528 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
529 scratch = buf + length;
533 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
534 length += sprintf(scratch, "%smodel_id=0x%06x",
535 need_coma++ ? "," : "",
537 scratch = buf + length;
540 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
541 length += sprintf(scratch, "%sspecifier_id=0x%06x",
542 need_coma++ ? "," : "",
544 scratch = buf + length;
547 if (id->match_flags & IEEE1394_MATCH_VERSION) {
548 length += sprintf(scratch, "%sversion=0x%06x",
549 need_coma++ ? "," : "",
551 scratch = buf + length;
562 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
565 fw_drv_attr(name, const char *, "%s\n")
567 static struct driver_attribute *const fw_drv_attrs[] = {
568 &driver_attr_drv_name,
569 &driver_attr_device_ids,
573 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
575 struct device_driver *drv = &driver->driver;
578 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
579 if (driver_create_file(drv, fw_drv_attrs[i]))
583 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
587 static void nodemgr_remove_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_remove_file(drv, fw_drv_attrs[i]);
597 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
599 struct device *dev = &ne->device;
602 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
603 if (device_create_file(dev, fw_ne_attrs[i]))
607 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
608 (unsigned long long)ne->guid);
612 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
614 struct device *dev = &host->device;
617 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
618 if (device_create_file(dev, fw_host_attrs[i]))
622 HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
626 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
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"))
641 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
642 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
644 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
645 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
649 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
652 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
654 struct device *dev = &ud->device;
657 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
658 if (device_create_file(dev, fw_ud_attrs[i]))
660 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
661 if (device_create_file(dev, &dev_attr_ud_specifier_id))
663 if (ud->flags & UNIT_DIRECTORY_VERSION)
664 if (device_create_file(dev, &dev_attr_ud_version))
666 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
667 if (device_create_file(dev, &dev_attr_ud_vendor_id))
669 if (ud->vendor_name_kv &&
670 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
673 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
674 if (device_create_file(dev, &dev_attr_ud_model_id))
676 if (ud->model_name_kv &&
677 device_create_file(dev, &dev_attr_ud_model_name_kv))
682 HPSB_ERR("Failed to add sysfs attributes for unit %s",
687 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
689 struct hpsb_protocol_driver *driver;
690 struct unit_directory *ud;
691 struct ieee1394_device_id *id;
693 /* We only match unit directories */
694 if (dev->platform_data != &nodemgr_ud_platform_data)
697 ud = container_of(dev, struct unit_directory, device);
698 if (ud->ne->in_limbo || ud->ignore_driver)
701 /* We only match drivers of type hpsb_protocol_driver */
702 if (drv == &nodemgr_mid_layer_driver)
705 driver = container_of(drv, struct hpsb_protocol_driver, driver);
706 for (id = driver->id_table; id->match_flags != 0; id++) {
707 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
708 id->vendor_id != ud->vendor_id)
711 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
712 id->model_id != ud->model_id)
715 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
716 id->specifier_id != ud->specifier_id)
719 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
720 id->version != ud->version)
730 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
732 static void nodemgr_remove_uds(struct node_entry *ne)
734 struct class_device *cdev;
735 struct unit_directory *tmp, *ud;
737 /* Iteration over nodemgr_ud_class.children has to be protected by
738 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
739 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
740 * release the semaphore, and then unregister the ud. Since this code
741 * may be called from other contexts besides the knodemgrds, protect the
742 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
744 mutex_lock(&nodemgr_serialize_remove_uds);
747 down(&nodemgr_ud_class.sem);
748 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
749 tmp = container_of(cdev, struct unit_directory,
756 up(&nodemgr_ud_class.sem);
759 class_device_unregister(&ud->class_dev);
760 device_unregister(&ud->device);
762 mutex_unlock(&nodemgr_serialize_remove_uds);
766 static void nodemgr_remove_ne(struct node_entry *ne)
770 dev = get_device(&ne->device);
774 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
775 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
777 nodemgr_remove_uds(ne);
779 class_device_unregister(&ne->class_dev);
780 device_unregister(dev);
785 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
787 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
791 static void nodemgr_remove_host_dev(struct device *dev)
793 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
794 sysfs_remove_link(&dev->kobj, "irm_id");
795 sysfs_remove_link(&dev->kobj, "busmgr_id");
796 sysfs_remove_link(&dev->kobj, "host_id");
800 static void nodemgr_update_bus_options(struct node_entry *ne)
802 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
803 static const u16 mr[] = { 4, 64, 1024, 0};
805 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
807 ne->busopt.irmc = (busoptions >> 31) & 1;
808 ne->busopt.cmc = (busoptions >> 30) & 1;
809 ne->busopt.isc = (busoptions >> 29) & 1;
810 ne->busopt.bmc = (busoptions >> 28) & 1;
811 ne->busopt.pmc = (busoptions >> 27) & 1;
812 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
813 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
814 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
815 ne->busopt.generation = (busoptions >> 4) & 0xf;
816 ne->busopt.lnkspd = busoptions & 0x7;
818 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
819 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
820 busoptions, ne->busopt.irmc, ne->busopt.cmc,
821 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
822 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
823 mr[ne->busopt.max_rom],
824 ne->busopt.generation, ne->busopt.lnkspd);
828 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
829 struct host_info *hi, nodeid_t nodeid,
830 unsigned int generation)
832 struct hpsb_host *host = hi->host;
833 struct node_entry *ne;
835 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
841 ne->generation = generation;
845 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
848 memcpy(&ne->device, &nodemgr_dev_template_ne,
850 ne->device.parent = &host->device;
851 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
852 (unsigned long long)(ne->guid));
854 ne->class_dev.dev = &ne->device;
855 ne->class_dev.class = &nodemgr_ne_class;
856 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
857 (unsigned long long)(ne->guid));
859 if (device_register(&ne->device))
861 if (class_device_register(&ne->class_dev))
862 goto fail_classdevreg;
863 get_device(&ne->device);
865 nodemgr_create_ne_dev_files(ne);
867 nodemgr_update_bus_options(ne);
869 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
870 (host->node_id == nodeid) ? "Host" : "Node",
871 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
876 device_unregister(&ne->device);
880 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
881 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
887 static struct node_entry *find_entry_by_guid(u64 guid)
889 struct class_device *cdev;
890 struct node_entry *ne, *ret_ne = NULL;
892 down(&nodemgr_ne_class.sem);
893 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
894 ne = container_of(cdev, struct node_entry, class_dev);
896 if (ne->guid == guid) {
901 up(&nodemgr_ne_class.sem);
907 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
910 struct class_device *cdev;
911 struct node_entry *ne, *ret_ne = NULL;
913 down(&nodemgr_ne_class.sem);
914 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
915 ne = container_of(cdev, struct node_entry, class_dev);
917 if (ne->host == host && ne->nodeid == nodeid) {
922 up(&nodemgr_ne_class.sem);
928 static void nodemgr_register_device(struct node_entry *ne,
929 struct unit_directory *ud, struct device *parent)
931 memcpy(&ud->device, &nodemgr_dev_template_ud,
934 ud->device.parent = parent;
936 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
937 ne->device.bus_id, ud->id);
939 ud->class_dev.dev = &ud->device;
940 ud->class_dev.class = &nodemgr_ud_class;
941 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
942 ne->device.bus_id, ud->id);
944 if (device_register(&ud->device))
946 if (class_device_register(&ud->class_dev))
947 goto fail_classdevreg;
948 get_device(&ud->device);
950 nodemgr_create_ud_dev_files(ud);
955 device_unregister(&ud->device);
957 HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
961 /* This implementation currently only scans the config rom and its
962 * immediate unit directories looking for software_id and
963 * software_version entries, in order to get driver autoloading working. */
964 static struct unit_directory *nodemgr_process_unit_directory
965 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
966 unsigned int *id, struct unit_directory *parent)
968 struct unit_directory *ud;
969 struct unit_directory *ud_child = NULL;
970 struct csr1212_dentry *dentry;
971 struct csr1212_keyval *kv;
974 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
976 goto unit_directory_error;
979 ud->ignore_driver = ignore_drivers;
980 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
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;
993 case CSR1212_KV_ID_MODEL:
994 ud->model_id = kv->value.immediate;
995 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
998 case CSR1212_KV_ID_SPECIFIER_ID:
999 ud->specifier_id = kv->value.immediate;
1000 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1003 case CSR1212_KV_ID_VERSION:
1004 ud->version = kv->value.immediate;
1005 ud->flags |= UNIT_DIRECTORY_VERSION;
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);
1021 case CSR1212_KV_ID_MODEL:
1022 ud->model_name_kv = kv;
1023 csr1212_keep_keyval(kv);
1027 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
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);
1036 goto unit_directory_error;
1037 nodemgr_register_device(ne, ud_child, &ne->device);
1042 ud->lun = kv->value.immediate;
1043 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
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.
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);
1056 /* process the child unit */
1057 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1059 if (ud_child == NULL)
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))
1066 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1067 ud_child->model_id = ud->model_id;
1069 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1070 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1072 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1073 ud_child->specifier_id = ud->specifier_id;
1075 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1076 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1078 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1079 ud_child->version = ud->version;
1082 /* register the child unit */
1083 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1084 nodemgr_register_device(ne, ud_child, &ud->device);
1092 last_key_id = kv->key.id;
1095 /* do not process child units here and only if not already registered */
1096 if (!parent && ud->device.bus != &ieee1394_bus_type)
1097 nodemgr_register_device(ne, ud, &ne->device);
1101 unit_directory_error:
1107 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1109 unsigned int ud_id = 0;
1110 struct csr1212_dentry *dentry;
1111 struct csr1212_keyval *kv;
1114 ne->needs_probe = 0;
1116 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1117 switch (kv->key.id) {
1118 case CSR1212_KV_ID_VENDOR:
1119 ne->vendor_id = kv->value.immediate;
1122 case CSR1212_KV_ID_NODE_CAPABILITIES:
1123 ne->capabilities = kv->value.immediate;
1126 case CSR1212_KV_ID_UNIT:
1127 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1130 case CSR1212_KV_ID_DESCRIPTOR:
1131 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1132 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1133 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1134 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1135 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1136 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1137 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1138 ne->vendor_name_kv = kv;
1139 csr1212_keep_keyval(kv);
1144 last_key_id = kv->key.id;
1147 if (ne->vendor_name_kv &&
1148 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1152 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1153 (unsigned long long)ne->guid);
1156 #ifdef CONFIG_HOTPLUG
1158 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1159 char *buffer, int buffer_size)
1161 struct unit_directory *ud;
1165 /* ieee1394:venNmoNspNverN */
1166 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1171 ud = container_of(cdev, struct unit_directory, class_dev);
1173 if (ud->ne->in_limbo || ud->ignore_driver)
1176 #define PUT_ENVP(fmt,val) \
1178 retval = add_uevent_var(envp, num_envp, &i, \
1179 buffer, buffer_size, &length, \
1185 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1186 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1187 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1188 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1189 PUT_ENVP("VERSION=%06x", ud->version);
1190 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1195 PUT_ENVP("MODALIAS=%s", buf);
1206 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1207 char *buffer, int buffer_size)
1212 #endif /* CONFIG_HOTPLUG */
1215 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1216 struct module *owner)
1220 drv->driver.bus = &ieee1394_bus_type;
1221 drv->driver.owner = owner;
1222 drv->driver.name = drv->name;
1224 /* This will cause a probe for devices */
1225 error = driver_register(&drv->driver);
1227 nodemgr_create_drv_files(drv);
1231 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1233 nodemgr_remove_drv_files(driver);
1234 /* This will subsequently disconnect all devices that our driver
1235 * is attached to. */
1236 driver_unregister(&driver->driver);
1241 * This function updates nodes that were present on the bus before the
1242 * reset and still are after the reset. The nodeid and the config rom
1243 * may have changed, and the drivers managing this device must be
1244 * informed that this device just went through a bus reset, to allow
1245 * the to take whatever actions required.
1247 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1248 struct host_info *hi, nodeid_t nodeid,
1249 unsigned int generation)
1251 if (ne->nodeid != nodeid) {
1252 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1253 NODE_BUS_ARGS(ne->host, ne->nodeid),
1254 NODE_BUS_ARGS(ne->host, nodeid));
1255 ne->nodeid = nodeid;
1258 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1259 kfree(ne->csr->private);
1260 csr1212_destroy_csr(ne->csr);
1263 /* If the node's configrom generation has changed, we
1264 * unregister all the unit directories. */
1265 nodemgr_remove_uds(ne);
1267 nodemgr_update_bus_options(ne);
1269 /* Mark the node as new, so it gets re-probed */
1270 ne->needs_probe = 1;
1272 /* old cache is valid, so update its generation */
1273 struct nodemgr_csr_info *ci = ne->csr->private;
1274 ci->generation = generation;
1275 /* free the partially filled now unneeded new cache */
1276 kfree(csr->private);
1277 csr1212_destroy_csr(csr);
1281 nodemgr_resume_ne(ne);
1283 /* Mark the node current */
1284 ne->generation = generation;
1289 static void nodemgr_node_scan_one(struct host_info *hi,
1290 nodeid_t nodeid, int generation)
1292 struct hpsb_host *host = hi->host;
1293 struct node_entry *ne;
1295 struct csr1212_csr *csr;
1296 struct nodemgr_csr_info *ci;
1299 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1304 ci->nodeid = nodeid;
1305 ci->generation = generation;
1307 /* Prepare for speed probe which occurs when reading the ROM */
1308 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1309 if (*speed > host->csr.lnk_spd)
1310 *speed = host->csr.lnk_spd;
1311 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1313 /* We need to detect when the ConfigROM's generation has changed,
1314 * so we only update the node's info when it needs to be. */
1316 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1317 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1318 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1319 NODE_BUS_ARGS(host, nodeid));
1321 csr1212_destroy_csr(csr);
1326 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1327 /* This isn't a 1394 device, but we let it slide. There
1328 * was a report of a device with broken firmware which
1329 * reported '2394' instead of '1394', which is obviously a
1330 * mistake. One would hope that a non-1394 device never
1331 * gets connected to Firewire bus. If someone does, we
1332 * shouldn't be held responsible, so we'll allow it with a
1334 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1335 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1338 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1339 ne = find_entry_by_guid(guid);
1341 if (ne && ne->host != host && ne->in_limbo) {
1342 /* Must have moved this device from one host to another */
1343 nodemgr_remove_ne(ne);
1348 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1350 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1354 static void nodemgr_node_scan(struct host_info *hi, int generation)
1357 struct hpsb_host *host = hi->host;
1358 struct selfid *sid = (struct selfid *)host->topology_map;
1359 nodeid_t nodeid = LOCAL_BUS;
1361 /* Scan each node on the bus */
1362 for (count = host->selfid_count; count; count--, sid++) {
1366 if (!sid->link_active) {
1370 nodemgr_node_scan_one(hi, nodeid++, generation);
1375 static void nodemgr_suspend_ne(struct node_entry *ne)
1377 struct class_device *cdev;
1378 struct unit_directory *ud;
1380 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1381 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1384 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1386 down(&nodemgr_ud_class.sem);
1387 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1388 ud = container_of(cdev, struct unit_directory, class_dev);
1392 if (ud->device.driver &&
1393 (!ud->device.driver->suspend ||
1394 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1395 device_release_driver(&ud->device);
1397 up(&nodemgr_ud_class.sem);
1401 static void nodemgr_resume_ne(struct node_entry *ne)
1403 struct class_device *cdev;
1404 struct unit_directory *ud;
1407 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1409 down(&nodemgr_ud_class.sem);
1410 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1411 ud = container_of(cdev, struct unit_directory, class_dev);
1415 if (ud->device.driver && ud->device.driver->resume)
1416 ud->device.driver->resume(&ud->device);
1418 up(&nodemgr_ud_class.sem);
1420 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1421 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1425 static void nodemgr_update_pdrv(struct node_entry *ne)
1427 struct unit_directory *ud;
1428 struct hpsb_protocol_driver *pdrv;
1429 struct class_device *cdev;
1431 down(&nodemgr_ud_class.sem);
1432 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1433 ud = container_of(cdev, struct unit_directory, class_dev);
1437 if (ud->device.driver) {
1438 pdrv = container_of(ud->device.driver,
1439 struct hpsb_protocol_driver,
1441 if (pdrv->update && pdrv->update(ud))
1442 device_release_driver(&ud->device);
1445 up(&nodemgr_ud_class.sem);
1449 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1450 * seems like an optional service but in the end it is practically mandatory
1451 * as a consequence of these clauses.
1453 * Note that we cannot do a broadcast write to all nodes at once because some
1454 * pre-1394a devices would hang. */
1455 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1457 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1458 quadlet_t bc_remote, bc_local;
1461 if (!ne->host->is_irm || ne->generation != generation ||
1462 ne->nodeid == ne->host->node_id)
1465 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1467 /* Check if the register is implemented and 1394a compliant. */
1468 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1470 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1471 bc_remote != bc_local)
1472 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1476 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1480 if (ne->host != hi->host || ne->in_limbo)
1483 dev = get_device(&ne->device);
1487 nodemgr_irm_write_bc(ne, generation);
1489 /* If "needs_probe", then this is either a new or changed node we
1490 * rescan totally. If the generation matches for an existing node
1491 * (one that existed prior to the bus reset) we send update calls
1492 * down to the drivers. Otherwise, this is a dead node and we
1494 if (ne->needs_probe)
1495 nodemgr_process_root_directory(hi, ne);
1496 else if (ne->generation == generation)
1497 nodemgr_update_pdrv(ne);
1499 nodemgr_suspend_ne(ne);
1505 static void nodemgr_node_probe(struct host_info *hi, int generation)
1507 struct hpsb_host *host = hi->host;
1508 struct class_device *cdev;
1509 struct node_entry *ne;
1511 /* Do some processing of the nodes we've probed. This pulls them
1512 * into the sysfs layer if needed, and can result in processing of
1513 * unit-directories, or just updating the node and it's
1516 * Run updates before probes. Usually, updates are time-critical
1517 * while probes are time-consuming. (Well, those probes need some
1518 * improvement...) */
1520 down(&nodemgr_ne_class.sem);
1521 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1522 ne = container_of(cdev, struct node_entry, class_dev);
1523 if (!ne->needs_probe)
1524 nodemgr_probe_ne(hi, ne, generation);
1526 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1527 ne = container_of(cdev, struct node_entry, class_dev);
1528 if (ne->needs_probe)
1529 nodemgr_probe_ne(hi, ne, generation);
1531 up(&nodemgr_ne_class.sem);
1534 /* If we had a bus reset while we were scanning the bus, it is
1535 * possible that we did not probe all nodes. In that case, we
1536 * skip the clean up for now, since we could remove nodes that
1537 * were still on the bus. Another bus scan is pending which will
1538 * do the clean up eventually.
1540 * Now let's tell the bus to rescan our devices. This may seem
1541 * like overhead, but the driver-model core will only scan a
1542 * device for a driver when either the device is added, or when a
1543 * new driver is added. A bus reset is a good reason to rescan
1544 * devices that were there before. For example, an sbp2 device
1545 * may become available for login, if the host that held it was
1548 if (generation == get_hpsb_generation(host))
1549 if (bus_rescan_devices(&ieee1394_bus_type))
1550 HPSB_DEBUG("bus_rescan_devices had an error");
1553 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1555 struct hpsb_packet *packet;
1556 int error = -ENOMEM;
1558 packet = hpsb_make_phypacket(host,
1559 EXTPHYPACKET_TYPE_RESUME |
1560 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1562 packet->no_waiter = 1;
1563 packet->generation = get_hpsb_generation(host);
1564 error = hpsb_send_packet(packet);
1567 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1572 /* Perform a few high-level IRM responsibilities. */
1573 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1577 /* if irm_id == -1 then there is no IRM on this bus */
1578 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1581 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1582 host->csr.broadcast_channel |= 0x40000000;
1584 /* If there is no bus manager then we should set the root node's
1585 * force_root bit to promote bus stability per the 1394
1586 * spec. (8.4.2.6) */
1587 if (host->busmgr_id == 0xffff && host->node_count > 1)
1589 u16 root_node = host->node_count - 1;
1591 /* get cycle master capability flag from root node */
1592 if (host->is_cycmst ||
1593 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1594 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1595 &bc, sizeof(quadlet_t)) &&
1596 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1597 hpsb_send_phy_config(host, root_node, -1);
1599 HPSB_DEBUG("The root node is not cycle master capable; "
1600 "selecting a new root node and resetting...");
1603 /* Oh screw it! Just leave the bus as it is */
1604 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1608 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1609 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1615 /* Some devices suspend their ports while being connected to an inactive
1616 * host adapter, i.e. if connected before the low-level driver is
1617 * loaded. They become visible either when physically unplugged and
1618 * replugged, or when receiving a resume packet. Send one once. */
1619 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1620 host->resume_packet_sent = 1;
1625 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1626 * everything we can do, otherwise issue a bus reset and try to become the IRM
1628 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1633 if (hpsb_disable_irm || host->is_irm)
1636 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1637 get_hpsb_generation(host),
1638 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1639 &bc, sizeof(quadlet_t));
1641 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1642 /* The current irm node does not have a valid BROADCAST_CHANNEL
1643 * register and we do, so reset the bus with force_root set */
1644 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1647 /* Oh screw it! Just leave the bus as it is */
1648 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1652 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1653 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1661 static int nodemgr_host_thread(void *__hi)
1663 struct host_info *hi = (struct host_info *)__hi;
1664 struct hpsb_host *host = hi->host;
1665 unsigned int g, generation = 0;
1666 int i, reset_cycles = 0;
1668 /* Setup our device-model entries */
1669 nodemgr_create_host_dev_files(host);
1672 /* Sleep until next bus reset */
1673 set_current_state(TASK_INTERRUPTIBLE);
1674 if (get_hpsb_generation(host) == generation &&
1675 !kthread_should_stop())
1677 __set_current_state(TASK_RUNNING);
1679 /* Thread may have been woken up to freeze or to exit */
1680 if (try_to_freeze())
1682 if (kthread_should_stop())
1685 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1686 if (try_to_freeze())
1691 /* Pause for 1/4 second in 1/16 second intervals,
1692 * to make sure things settle down. */
1693 g = get_hpsb_generation(host);
1694 for (i = 0; i < 4 ; i++) {
1695 if (msleep_interruptible(63) || kthread_should_stop())
1698 /* Now get the generation in which the node ID's we collect
1699 * are valid. During the bus scan we will use this generation
1700 * for the read transactions, so that if another reset occurs
1701 * during the scan the transactions will fail instead of
1702 * returning bogus data. */
1703 generation = get_hpsb_generation(host);
1705 /* If we get a reset before we are done waiting, then
1706 * start the the waiting over again */
1707 if (generation != g)
1708 g = generation, i = 0;
1711 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1712 !nodemgr_do_irm_duties(host, reset_cycles)) {
1714 mutex_unlock(&nodemgr_serialize);
1719 /* Scan our nodes to get the bus options and create node
1720 * entries. This does not do the sysfs stuff, since that
1721 * would trigger uevents and such, which is a bad idea at
1723 nodemgr_node_scan(hi, generation);
1725 /* This actually does the full probe, with sysfs
1727 nodemgr_node_probe(hi, generation);
1729 /* Update some of our sysfs symlinks */
1730 nodemgr_update_host_dev_links(host);
1732 mutex_unlock(&nodemgr_serialize);
1735 mutex_unlock(&nodemgr_serialize);
1737 HPSB_VERBOSE("NodeMgr: Exiting thread");
1741 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1743 struct class_device *cdev;
1744 struct hpsb_host *host;
1747 down(&hpsb_host_class.sem);
1748 list_for_each_entry(cdev, &hpsb_host_class.children, node) {
1749 host = container_of(cdev, struct hpsb_host, class_dev);
1751 if ((error = cb(host, __data)))
1754 up(&hpsb_host_class.sem);
1759 /* The following four convenience functions use a struct node_entry
1760 * for addressing a node on the bus. They are intended for use by any
1761 * process context, not just the nodemgr thread, so we need to be a
1762 * little careful when reading out the node ID and generation. The
1763 * thing that can go wrong is that we get the node ID, then a bus
1764 * reset occurs, and then we read the generation. The node ID is
1765 * possibly invalid, but the generation is current, and we end up
1766 * sending a packet to a the wrong node.
1768 * The solution is to make sure we read the generation first, so that
1769 * if a reset occurs in the process, we end up with a stale generation
1770 * and the transactions will fail instead of silently using wrong node
1774 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1776 pkt->host = ne->host;
1777 pkt->generation = ne->generation;
1779 pkt->node_id = ne->nodeid;
1782 int hpsb_node_write(struct node_entry *ne, u64 addr,
1783 quadlet_t *buffer, size_t length)
1785 unsigned int generation = ne->generation;
1788 return hpsb_write(ne->host, ne->nodeid, generation,
1789 addr, buffer, length);
1792 static void nodemgr_add_host(struct hpsb_host *host)
1794 struct host_info *hi;
1796 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1798 HPSB_ERR("NodeMgr: out of memory in add host");
1802 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1804 if (IS_ERR(hi->thread)) {
1805 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1806 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1810 static void nodemgr_host_reset(struct hpsb_host *host)
1812 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1815 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1816 wake_up_process(hi->thread);
1820 static void nodemgr_remove_host(struct hpsb_host *host)
1822 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1825 kthread_stop(hi->thread);
1826 nodemgr_remove_host_dev(&host->device);
1830 static struct hpsb_highlevel nodemgr_highlevel = {
1831 .name = "Node manager",
1832 .add_host = nodemgr_add_host,
1833 .host_reset = nodemgr_host_reset,
1834 .remove_host = nodemgr_remove_host,
1837 int init_ieee1394_nodemgr(void)
1841 error = class_register(&nodemgr_ne_class);
1844 error = class_register(&nodemgr_ud_class);
1847 error = driver_register(&nodemgr_mid_layer_driver);
1850 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1851 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1853 hpsb_register_highlevel(&nodemgr_highlevel);
1857 class_unregister(&nodemgr_ud_class);
1859 class_unregister(&nodemgr_ne_class);
1864 void cleanup_ieee1394_nodemgr(void)
1866 hpsb_unregister_highlevel(&nodemgr_highlevel);
1867 driver_unregister(&nodemgr_mid_layer_driver);
1868 class_unregister(&nodemgr_ud_class);
1869 class_unregister(&nodemgr_ne_class);