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/moduleparam.h>
18 #include <linux/freezer.h>
19 #include <asm/atomic.h>
22 #include "highlevel.h"
25 #include "ieee1394_core.h"
26 #include "ieee1394_hotplug.h"
27 #include "ieee1394_types.h"
28 #include "ieee1394_transactions.h"
31 static int ignore_drivers;
32 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
33 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
35 struct nodemgr_csr_info {
36 struct hpsb_host *host;
38 unsigned int generation;
39 unsigned int speed_unverified:1;
43 static char *nodemgr_find_oui_name(int oui)
45 #ifdef CONFIG_IEEE1394_OUI_DB
46 extern struct oui_list_struct {
52 for (i = 0; oui_list[i].name; i++)
53 if (oui_list[i].oui == oui)
54 return oui_list[i].name;
60 * Correct the speed map entry. This is necessary
61 * - for nodes with link speed < phy speed,
62 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
63 * A possible speed is determined by trial and error, using quadlet reads.
65 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
69 u8 i, *speed, old_speed, good_speed;
72 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
74 good_speed = IEEE1394_SPEED_MAX + 1;
76 /* Try every speed from S100 to old_speed.
77 * If we did it the other way around, a too low speed could be caught
78 * if the retry succeeded for some other reason, e.g. because the link
79 * just finished its initialization. */
80 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
82 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
83 &q, sizeof(quadlet_t));
89 if (good_speed <= IEEE1394_SPEED_MAX) {
90 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
91 NODE_BUS_ARGS(ci->host, ci->nodeid),
92 hpsb_speedto_str[good_speed]);
94 ci->speed_unverified = 0;
101 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
102 void *buffer, void *__ci)
104 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
108 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
111 ci->speed_unverified = 0;
114 /* Give up after 3rd failure. */
118 /* The ieee1394_core guessed the node's speed capability from
119 * the self ID. Check whether a lower speed works. */
120 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
121 ret = nodemgr_check_speed(ci, addr, buffer);
125 if (msleep_interruptible(334))
131 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
133 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
136 static struct csr1212_bus_ops nodemgr_csr_ops = {
137 .bus_read = nodemgr_bus_read,
138 .get_max_rom = nodemgr_get_max_rom
143 * Basically what we do here is start off retrieving the bus_info block.
144 * From there will fill in some info about the node, verify it is of IEEE
145 * 1394 type, and that the crc checks out ok. After that we start off with
146 * the root directory, and subdirectories. To do this, we retrieve the
147 * quadlet header for a directory, find out the length, and retrieve the
148 * complete directory entry (be it a leaf or a directory). We then process
149 * it and add the info to our structure for that particular node.
151 * We verify CRC's along the way for each directory/block/leaf. The entire
152 * node structure is generic, and simply stores the information in a way
153 * that's easy to parse by the protocol interface.
157 * The nodemgr relies heavily on the Driver Model for device callbacks and
158 * driver/device mappings. The old nodemgr used to handle all this itself,
159 * but now we are much simpler because of the LDM.
162 static DEFINE_MUTEX(nodemgr_serialize);
165 struct hpsb_host *host;
166 struct list_head list;
167 struct task_struct *thread;
170 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
171 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
172 char *buffer, int buffer_size);
173 static void nodemgr_resume_ne(struct node_entry *ne);
174 static void nodemgr_remove_ne(struct node_entry *ne);
175 static struct node_entry *find_entry_by_guid(u64 guid);
177 struct bus_type ieee1394_bus_type = {
179 .match = nodemgr_bus_match,
182 static void host_cls_release(struct class_device *class_dev)
184 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
187 struct class hpsb_host_class = {
188 .name = "ieee1394_host",
189 .release = host_cls_release,
192 static void ne_cls_release(struct class_device *class_dev)
194 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
197 static struct class nodemgr_ne_class = {
198 .name = "ieee1394_node",
199 .release = ne_cls_release,
202 static void ud_cls_release(struct class_device *class_dev)
204 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
207 /* The name here is only so that unit directory hotplug works with old
208 * style hotplug, which only ever did unit directories anyway. */
209 static struct class nodemgr_ud_class = {
211 .release = ud_cls_release,
212 .uevent = nodemgr_uevent,
215 static struct hpsb_highlevel nodemgr_highlevel;
218 static void nodemgr_release_ud(struct device *dev)
220 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
222 if (ud->vendor_name_kv)
223 csr1212_release_keyval(ud->vendor_name_kv);
224 if (ud->model_name_kv)
225 csr1212_release_keyval(ud->model_name_kv);
230 static void nodemgr_release_ne(struct device *dev)
232 struct node_entry *ne = container_of(dev, struct node_entry, device);
234 if (ne->vendor_name_kv)
235 csr1212_release_keyval(ne->vendor_name_kv);
241 static void nodemgr_release_host(struct device *dev)
243 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
245 csr1212_destroy_csr(host->csr.rom);
250 static int nodemgr_ud_platform_data;
252 static struct device nodemgr_dev_template_ud = {
253 .bus = &ieee1394_bus_type,
254 .release = nodemgr_release_ud,
255 .platform_data = &nodemgr_ud_platform_data,
258 static struct device nodemgr_dev_template_ne = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_ne,
263 struct device nodemgr_dev_template_host = {
264 .bus = &ieee1394_bus_type,
265 .release = nodemgr_release_host,
269 #define fw_attr(class, class_type, field, type, format_string) \
270 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
273 class = container_of(dev, class_type, device); \
274 return sprintf(buf, format_string, (type)class->field); \
276 static struct device_attribute dev_attr_##class##_##field = { \
277 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
278 .show = fw_show_##class##_##field, \
281 #define fw_attr_td(class, class_type, td_kv) \
282 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
285 class_type *class = container_of(dev, class_type, device); \
286 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
288 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
290 while ((buf + len - 1) == '\0') \
296 static struct device_attribute dev_attr_##class##_##td_kv = { \
297 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
298 .show = fw_show_##class##_##td_kv, \
302 #define fw_drv_attr(field, type, format_string) \
303 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
305 struct hpsb_protocol_driver *driver; \
306 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
307 return sprintf(buf, format_string, (type)driver->field);\
309 static struct driver_attribute driver_attr_drv_##field = { \
310 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
311 .show = fw_drv_show_##field, \
315 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
317 struct node_entry *ne = container_of(dev, struct node_entry, device);
319 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
320 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
322 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
323 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
326 ne->busopt.cyc_clk_acc);
328 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
331 #ifdef HPSB_DEBUG_TLABELS
332 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
333 struct device_attribute *attr, char *buf)
335 struct node_entry *ne = container_of(dev, struct node_entry, device);
337 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
340 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
341 tf = 64 - bitmap_weight(tp, 64);
342 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
344 return sprintf(buf, "%d\n", tf);
346 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
349 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
350 struct device_attribute *attr, char *buf)
352 struct node_entry *ne = container_of(dev, struct node_entry, device);
354 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
357 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
358 #if (BITS_PER_LONG <= 32)
359 tm = ((u64)tp[0] << 32) + tp[1];
363 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
365 return sprintf(buf, "0x%016llx\n", tm);
367 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
368 #endif /* HPSB_DEBUG_TLABELS */
371 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
373 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
374 int state = simple_strtoul(buf, NULL, 10);
377 down_write(&dev->bus->subsys.rwsem);
378 device_release_driver(dev);
379 ud->ignore_driver = 1;
380 up_write(&dev->bus->subsys.rwsem);
382 ud->ignore_driver = 0;
386 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
388 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
390 return sprintf(buf, "%d\n", ud->ignore_driver);
392 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
395 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
397 struct node_entry *ne;
398 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
400 ne = find_entry_by_guid(guid);
402 if (ne == NULL || !ne->in_limbo)
405 nodemgr_remove_ne(ne);
409 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
411 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
413 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
416 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
421 if (simple_strtoul(buf, NULL, 10) == 1)
422 error = bus_rescan_devices(&ieee1394_bus_type);
423 return error ? error : count;
425 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
427 return sprintf(buf, "You can force a rescan of the bus for "
428 "drivers by writing a 1 to this file\n");
430 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
433 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
435 int state = simple_strtoul(buf, NULL, 10);
444 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
446 return sprintf(buf, "%d\n", ignore_drivers);
448 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
451 struct bus_attribute *const fw_bus_attrs[] = {
452 &bus_attr_destroy_node,
454 &bus_attr_ignore_drivers,
459 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
460 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
462 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
463 fw_attr_td(ne, struct node_entry, vendor_name_kv)
464 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
466 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
467 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
468 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
469 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
471 static struct device_attribute *const fw_ne_attrs[] = {
473 &dev_attr_ne_guid_vendor_id,
474 &dev_attr_ne_capabilities,
475 &dev_attr_ne_vendor_id,
477 &dev_attr_bus_options,
478 #ifdef HPSB_DEBUG_TLABELS
479 &dev_attr_tlabels_free,
480 &dev_attr_tlabels_mask,
486 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
487 fw_attr(ud, struct unit_directory, length, int, "%d\n")
488 /* These are all dependent on the value being provided */
489 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
490 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
491 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
492 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
493 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
494 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
495 fw_attr_td(ud, struct unit_directory, model_name_kv)
497 static struct device_attribute *const fw_ud_attrs[] = {
498 &dev_attr_ud_address,
500 &dev_attr_ignore_driver,
504 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
505 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
506 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
507 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
508 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
509 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
510 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
511 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
513 static struct device_attribute *const fw_host_attrs[] = {
514 &dev_attr_host_node_count,
515 &dev_attr_host_selfid_count,
516 &dev_attr_host_nodes_active,
517 &dev_attr_host_in_bus_reset,
518 &dev_attr_host_is_root,
519 &dev_attr_host_is_cycmst,
520 &dev_attr_host_is_irm,
521 &dev_attr_host_is_busmgr,
525 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
527 struct hpsb_protocol_driver *driver;
528 struct ieee1394_device_id *id;
532 driver = container_of(drv, struct hpsb_protocol_driver, driver);
534 for (id = driver->id_table; id->match_flags != 0; id++) {
537 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
538 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
539 scratch = buf + length;
543 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
544 length += sprintf(scratch, "%smodel_id=0x%06x",
545 need_coma++ ? "," : "",
547 scratch = buf + length;
550 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
551 length += sprintf(scratch, "%sspecifier_id=0x%06x",
552 need_coma++ ? "," : "",
554 scratch = buf + length;
557 if (id->match_flags & IEEE1394_MATCH_VERSION) {
558 length += sprintf(scratch, "%sversion=0x%06x",
559 need_coma++ ? "," : "",
561 scratch = buf + length;
572 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
575 fw_drv_attr(name, const char *, "%s\n")
577 static struct driver_attribute *const fw_drv_attrs[] = {
578 &driver_attr_drv_name,
579 &driver_attr_device_ids,
583 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
585 struct device_driver *drv = &driver->driver;
588 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
589 if (driver_create_file(drv, fw_drv_attrs[i]))
593 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
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 if (device_create_file(dev, fw_ne_attrs[i]))
617 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
618 (unsigned long long)ne->guid);
622 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
624 struct device *dev = &host->device;
627 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
628 if (device_create_file(dev, fw_host_attrs[i]))
632 HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
636 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
639 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
641 struct device *dev = &host->device;
642 struct node_entry *ne;
644 sysfs_remove_link(&dev->kobj, "irm_id");
645 sysfs_remove_link(&dev->kobj, "busmgr_id");
646 sysfs_remove_link(&dev->kobj, "host_id");
648 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
649 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
651 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
652 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
654 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
655 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
659 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
662 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
664 struct device *dev = &ud->device;
667 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
668 if (device_create_file(dev, fw_ud_attrs[i]))
670 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
671 if (device_create_file(dev, &dev_attr_ud_specifier_id))
673 if (ud->flags & UNIT_DIRECTORY_VERSION)
674 if (device_create_file(dev, &dev_attr_ud_version))
676 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
677 if (device_create_file(dev, &dev_attr_ud_vendor_id))
679 if (ud->vendor_name_kv &&
680 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
683 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
684 if (device_create_file(dev, &dev_attr_ud_model_id))
686 if (ud->model_name_kv &&
687 device_create_file(dev, &dev_attr_ud_model_name_kv))
692 HPSB_ERR("Failed to add sysfs attributes for unit %s",
697 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
699 struct hpsb_protocol_driver *driver;
700 struct unit_directory *ud;
701 struct ieee1394_device_id *id;
703 /* We only match unit directories */
704 if (dev->platform_data != &nodemgr_ud_platform_data)
707 ud = container_of(dev, struct unit_directory, device);
708 driver = container_of(drv, struct hpsb_protocol_driver, driver);
710 if (ud->ne->in_limbo || ud->ignore_driver)
713 for (id = driver->id_table; id->match_flags != 0; id++) {
714 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
715 id->vendor_id != ud->vendor_id)
718 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
719 id->model_id != ud->model_id)
722 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
723 id->specifier_id != ud->specifier_id)
726 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
727 id->version != ud->version)
737 static void nodemgr_remove_uds(struct node_entry *ne)
739 struct class_device *cdev, *next;
740 struct unit_directory *ud;
742 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
743 ud = container_of(cdev, struct unit_directory, class_dev);
748 class_device_unregister(&ud->class_dev);
749 device_unregister(&ud->device);
754 static void nodemgr_remove_ne(struct node_entry *ne)
756 struct device *dev = &ne->device;
758 dev = get_device(&ne->device);
762 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
763 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
765 nodemgr_remove_uds(ne);
767 class_device_unregister(&ne->class_dev);
768 device_unregister(dev);
773 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
775 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
779 static void nodemgr_remove_host_dev(struct device *dev)
781 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
782 sysfs_remove_link(&dev->kobj, "irm_id");
783 sysfs_remove_link(&dev->kobj, "busmgr_id");
784 sysfs_remove_link(&dev->kobj, "host_id");
788 static void nodemgr_update_bus_options(struct node_entry *ne)
790 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
791 static const u16 mr[] = { 4, 64, 1024, 0};
793 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
795 ne->busopt.irmc = (busoptions >> 31) & 1;
796 ne->busopt.cmc = (busoptions >> 30) & 1;
797 ne->busopt.isc = (busoptions >> 29) & 1;
798 ne->busopt.bmc = (busoptions >> 28) & 1;
799 ne->busopt.pmc = (busoptions >> 27) & 1;
800 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
801 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
802 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
803 ne->busopt.generation = (busoptions >> 4) & 0xf;
804 ne->busopt.lnkspd = busoptions & 0x7;
806 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
807 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
808 busoptions, ne->busopt.irmc, ne->busopt.cmc,
809 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
810 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
811 mr[ne->busopt.max_rom],
812 ne->busopt.generation, ne->busopt.lnkspd);
816 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
817 struct host_info *hi, nodeid_t nodeid,
818 unsigned int generation)
820 struct hpsb_host *host = hi->host;
821 struct node_entry *ne;
823 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
829 ne->generation = generation;
833 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
834 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
837 memcpy(&ne->device, &nodemgr_dev_template_ne,
839 ne->device.parent = &host->device;
840 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
841 (unsigned long long)(ne->guid));
843 ne->class_dev.dev = &ne->device;
844 ne->class_dev.class = &nodemgr_ne_class;
845 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
846 (unsigned long long)(ne->guid));
848 if (device_register(&ne->device))
850 if (class_device_register(&ne->class_dev))
851 goto fail_classdevreg;
852 get_device(&ne->device);
854 if (ne->guid_vendor_oui &&
855 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui))
857 nodemgr_create_ne_dev_files(ne);
859 nodemgr_update_bus_options(ne);
861 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
862 (host->node_id == nodeid) ? "Host" : "Node",
863 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
868 put_device(&ne->device);
870 device_unregister(&ne->device);
874 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
875 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
881 static struct node_entry *find_entry_by_guid(u64 guid)
883 struct class *class = &nodemgr_ne_class;
884 struct class_device *cdev;
885 struct node_entry *ne, *ret_ne = NULL;
887 down_read(&class->subsys.rwsem);
888 list_for_each_entry(cdev, &class->children, node) {
889 ne = container_of(cdev, struct node_entry, class_dev);
891 if (ne->guid == guid) {
896 up_read(&class->subsys.rwsem);
902 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
904 struct class *class = &nodemgr_ne_class;
905 struct class_device *cdev;
906 struct node_entry *ne, *ret_ne = NULL;
908 down_read(&class->subsys.rwsem);
909 list_for_each_entry(cdev, &class->children, node) {
910 ne = container_of(cdev, struct node_entry, class_dev);
912 if (ne->host == host && ne->nodeid == nodeid) {
917 up_read(&class->subsys.rwsem);
923 static void nodemgr_register_device(struct node_entry *ne,
924 struct unit_directory *ud, struct device *parent)
926 memcpy(&ud->device, &nodemgr_dev_template_ud,
929 ud->device.parent = parent;
931 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
932 ne->device.bus_id, ud->id);
934 ud->class_dev.dev = &ud->device;
935 ud->class_dev.class = &nodemgr_ud_class;
936 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
937 ne->device.bus_id, ud->id);
939 if (device_register(&ud->device))
941 if (class_device_register(&ud->class_dev))
942 goto fail_classdevreg;
943 get_device(&ud->device);
945 if (ud->vendor_oui &&
946 device_create_file(&ud->device, &dev_attr_ud_vendor_oui))
948 nodemgr_create_ud_dev_files(ud);
953 put_device(&ud->device);
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;
992 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
996 case CSR1212_KV_ID_MODEL:
997 ud->model_id = kv->value.immediate;
998 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1001 case CSR1212_KV_ID_SPECIFIER_ID:
1002 ud->specifier_id = kv->value.immediate;
1003 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1006 case CSR1212_KV_ID_VERSION:
1007 ud->version = kv->value.immediate;
1008 ud->flags |= UNIT_DIRECTORY_VERSION;
1011 case CSR1212_KV_ID_DESCRIPTOR:
1012 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1013 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1014 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1015 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1016 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1017 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1018 switch (last_key_id) {
1019 case CSR1212_KV_ID_VENDOR:
1020 ud->vendor_name_kv = kv;
1021 csr1212_keep_keyval(kv);
1024 case CSR1212_KV_ID_MODEL:
1025 ud->model_name_kv = kv;
1026 csr1212_keep_keyval(kv);
1030 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1033 case CSR1212_KV_ID_DEPENDENT_INFO:
1034 /* Logical Unit Number */
1035 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1036 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1037 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
1039 goto unit_directory_error;
1040 memcpy(ud_child, ud, sizeof(*ud_child));
1041 nodemgr_register_device(ne, ud_child, &ne->device);
1046 ud->lun = kv->value.immediate;
1047 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1049 /* Logical Unit Directory */
1050 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1051 /* This should really be done in SBP2 as this is
1052 * doing SBP2 specific parsing.
1055 /* first register the parent unit */
1056 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1057 if (ud->device.bus != &ieee1394_bus_type)
1058 nodemgr_register_device(ne, ud, &ne->device);
1060 /* process the child unit */
1061 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1063 if (ud_child == NULL)
1066 /* inherit unspecified values, the driver core picks it up */
1067 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1068 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1070 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1071 ud_child->model_id = ud->model_id;
1073 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1074 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1076 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1077 ud_child->specifier_id = ud->specifier_id;
1079 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1080 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1082 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1083 ud_child->version = ud->version;
1086 /* register the child unit */
1087 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1088 nodemgr_register_device(ne, ud_child, &ud->device);
1096 last_key_id = kv->key.id;
1099 /* do not process child units here and only if not already registered */
1100 if (!parent && ud->device.bus != &ieee1394_bus_type)
1101 nodemgr_register_device(ne, ud, &ne->device);
1105 unit_directory_error:
1111 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1113 unsigned int ud_id = 0;
1114 struct csr1212_dentry *dentry;
1115 struct csr1212_keyval *kv;
1118 ne->needs_probe = 0;
1120 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1121 switch (kv->key.id) {
1122 case CSR1212_KV_ID_VENDOR:
1123 ne->vendor_id = kv->value.immediate;
1126 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1129 case CSR1212_KV_ID_NODE_CAPABILITIES:
1130 ne->capabilities = kv->value.immediate;
1133 case CSR1212_KV_ID_UNIT:
1134 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1137 case CSR1212_KV_ID_DESCRIPTOR:
1138 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1139 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1140 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1141 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1142 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1143 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1144 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1145 ne->vendor_name_kv = kv;
1146 csr1212_keep_keyval(kv);
1151 last_key_id = kv->key.id;
1154 if (ne->vendor_oui &&
1155 device_create_file(&ne->device, &dev_attr_ne_vendor_oui))
1157 if (ne->vendor_name_kv &&
1158 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1162 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1163 (unsigned long long)ne->guid);
1166 #ifdef CONFIG_HOTPLUG
1168 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1169 char *buffer, int buffer_size)
1171 struct unit_directory *ud;
1174 /* ieee1394:venNmoNspNverN */
1175 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1180 ud = container_of(cdev, struct unit_directory, class_dev);
1182 if (ud->ne->in_limbo || ud->ignore_driver)
1185 #define PUT_ENVP(fmt,val) \
1188 envp[i++] = buffer; \
1189 printed = snprintf(buffer, buffer_size - length, \
1191 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1193 length += printed+1; \
1194 buffer += printed+1; \
1197 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1198 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1199 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1200 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1201 PUT_ENVP("VERSION=%06x", ud->version);
1202 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1207 PUT_ENVP("MODALIAS=%s", buf);
1218 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1219 char *buffer, int buffer_size)
1224 #endif /* CONFIG_HOTPLUG */
1227 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1231 /* This will cause a probe for devices */
1232 ret = driver_register(&driver->driver);
1234 nodemgr_create_drv_files(driver);
1239 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1241 nodemgr_remove_drv_files(driver);
1242 /* This will subsequently disconnect all devices that our driver
1243 * is attached to. */
1244 driver_unregister(&driver->driver);
1249 * This function updates nodes that were present on the bus before the
1250 * reset and still are after the reset. The nodeid and the config rom
1251 * may have changed, and the drivers managing this device must be
1252 * informed that this device just went through a bus reset, to allow
1253 * the to take whatever actions required.
1255 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1256 struct host_info *hi, nodeid_t nodeid,
1257 unsigned int generation)
1259 if (ne->nodeid != nodeid) {
1260 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1261 NODE_BUS_ARGS(ne->host, ne->nodeid),
1262 NODE_BUS_ARGS(ne->host, nodeid));
1263 ne->nodeid = nodeid;
1266 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1267 kfree(ne->csr->private);
1268 csr1212_destroy_csr(ne->csr);
1271 /* If the node's configrom generation has changed, we
1272 * unregister all the unit directories. */
1273 nodemgr_remove_uds(ne);
1275 nodemgr_update_bus_options(ne);
1277 /* Mark the node as new, so it gets re-probed */
1278 ne->needs_probe = 1;
1280 /* old cache is valid, so update its generation */
1281 struct nodemgr_csr_info *ci = ne->csr->private;
1282 ci->generation = generation;
1283 /* free the partially filled now unneeded new cache */
1284 kfree(csr->private);
1285 csr1212_destroy_csr(csr);
1289 nodemgr_resume_ne(ne);
1291 /* Mark the node current */
1292 ne->generation = generation;
1297 static void nodemgr_node_scan_one(struct host_info *hi,
1298 nodeid_t nodeid, int generation)
1300 struct hpsb_host *host = hi->host;
1301 struct node_entry *ne;
1303 struct csr1212_csr *csr;
1304 struct nodemgr_csr_info *ci;
1307 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1312 ci->nodeid = nodeid;
1313 ci->generation = generation;
1315 /* Prepare for speed probe which occurs when reading the ROM */
1316 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1317 if (*speed > host->csr.lnk_spd)
1318 *speed = host->csr.lnk_spd;
1319 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1321 /* We need to detect when the ConfigROM's generation has changed,
1322 * so we only update the node's info when it needs to be. */
1324 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1325 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1326 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1327 NODE_BUS_ARGS(host, nodeid));
1329 csr1212_destroy_csr(csr);
1334 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1335 /* This isn't a 1394 device, but we let it slide. There
1336 * was a report of a device with broken firmware which
1337 * reported '2394' instead of '1394', which is obviously a
1338 * mistake. One would hope that a non-1394 device never
1339 * gets connected to Firewire bus. If someone does, we
1340 * shouldn't be held responsible, so we'll allow it with a
1342 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1343 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1346 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1347 ne = find_entry_by_guid(guid);
1349 if (ne && ne->host != host && ne->in_limbo) {
1350 /* Must have moved this device from one host to another */
1351 nodemgr_remove_ne(ne);
1356 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1358 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1362 static void nodemgr_node_scan(struct host_info *hi, int generation)
1365 struct hpsb_host *host = hi->host;
1366 struct selfid *sid = (struct selfid *)host->topology_map;
1367 nodeid_t nodeid = LOCAL_BUS;
1369 /* Scan each node on the bus */
1370 for (count = host->selfid_count; count; count--, sid++) {
1374 if (!sid->link_active) {
1378 nodemgr_node_scan_one(hi, nodeid++, generation);
1383 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1384 static void nodemgr_suspend_ne(struct node_entry *ne)
1386 struct class_device *cdev;
1387 struct unit_directory *ud;
1389 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1390 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1393 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1395 down_write(&ne->device.bus->subsys.rwsem);
1396 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1397 ud = container_of(cdev, struct unit_directory, class_dev);
1402 if (ud->device.driver &&
1403 (!ud->device.driver->suspend ||
1404 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1405 device_release_driver(&ud->device);
1407 up_write(&ne->device.bus->subsys.rwsem);
1411 static void nodemgr_resume_ne(struct node_entry *ne)
1413 struct class_device *cdev;
1414 struct unit_directory *ud;
1417 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1419 down_read(&nodemgr_ud_class.subsys.rwsem);
1420 down_read(&ne->device.bus->subsys.rwsem);
1421 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1422 ud = container_of(cdev, struct unit_directory, class_dev);
1427 if (ud->device.driver && ud->device.driver->resume)
1428 ud->device.driver->resume(&ud->device);
1430 up_read(&ne->device.bus->subsys.rwsem);
1431 up_read(&nodemgr_ud_class.subsys.rwsem);
1433 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1434 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1438 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
1439 static void nodemgr_update_pdrv(struct node_entry *ne)
1441 struct unit_directory *ud;
1442 struct hpsb_protocol_driver *pdrv;
1443 struct class_device *cdev;
1445 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1446 ud = container_of(cdev, struct unit_directory, class_dev);
1447 if (ud->ne != ne || !ud->device.driver)
1450 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1452 if (pdrv->update && pdrv->update(ud)) {
1453 down_write(&ud->device.bus->subsys.rwsem);
1454 device_release_driver(&ud->device);
1455 up_write(&ud->device.bus->subsys.rwsem);
1461 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1462 * seems like an optional service but in the end it is practically mandatory
1463 * as a consequence of these clauses.
1465 * Note that we cannot do a broadcast write to all nodes at once because some
1466 * pre-1394a devices would hang. */
1467 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1469 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1470 quadlet_t bc_remote, bc_local;
1473 if (!ne->host->is_irm || ne->generation != generation ||
1474 ne->nodeid == ne->host->node_id)
1477 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1479 /* Check if the register is implemented and 1394a compliant. */
1480 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1482 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1483 bc_remote != bc_local)
1484 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1488 /* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the
1489 * calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */
1490 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1494 if (ne->host != hi->host || ne->in_limbo)
1497 dev = get_device(&ne->device);
1501 nodemgr_irm_write_bc(ne, generation);
1503 /* If "needs_probe", then this is either a new or changed node we
1504 * rescan totally. If the generation matches for an existing node
1505 * (one that existed prior to the bus reset) we send update calls
1506 * down to the drivers. Otherwise, this is a dead node and we
1508 if (ne->needs_probe)
1509 nodemgr_process_root_directory(hi, ne);
1510 else if (ne->generation == generation)
1511 nodemgr_update_pdrv(ne);
1513 nodemgr_suspend_ne(ne);
1519 static void nodemgr_node_probe(struct host_info *hi, int generation)
1521 struct hpsb_host *host = hi->host;
1522 struct class *class = &nodemgr_ne_class;
1523 struct class_device *cdev;
1524 struct node_entry *ne;
1526 /* Do some processing of the nodes we've probed. This pulls them
1527 * into the sysfs layer if needed, and can result in processing of
1528 * unit-directories, or just updating the node and it's
1531 * Run updates before probes. Usually, updates are time-critical
1532 * while probes are time-consuming. (Well, those probes need some
1533 * improvement...) */
1535 down_read(&class->subsys.rwsem);
1536 list_for_each_entry(cdev, &class->children, node) {
1537 ne = container_of(cdev, struct node_entry, class_dev);
1538 if (!ne->needs_probe)
1539 nodemgr_probe_ne(hi, ne, generation);
1541 list_for_each_entry(cdev, &class->children, node) {
1542 ne = container_of(cdev, struct node_entry, class_dev);
1543 if (ne->needs_probe)
1544 nodemgr_probe_ne(hi, ne, generation);
1546 up_read(&class->subsys.rwsem);
1549 /* If we had a bus reset while we were scanning the bus, it is
1550 * possible that we did not probe all nodes. In that case, we
1551 * skip the clean up for now, since we could remove nodes that
1552 * were still on the bus. Another bus scan is pending which will
1553 * do the clean up eventually.
1555 * Now let's tell the bus to rescan our devices. This may seem
1556 * like overhead, but the driver-model core will only scan a
1557 * device for a driver when either the device is added, or when a
1558 * new driver is added. A bus reset is a good reason to rescan
1559 * devices that were there before. For example, an sbp2 device
1560 * may become available for login, if the host that held it was
1563 if (generation == get_hpsb_generation(host))
1564 WARN_ON(bus_rescan_devices(&ieee1394_bus_type));
1569 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1571 struct hpsb_packet *packet;
1574 packet = hpsb_make_phypacket(host,
1575 EXTPHYPACKET_TYPE_RESUME |
1576 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1578 packet->no_waiter = 1;
1579 packet->generation = get_hpsb_generation(host);
1580 ret = hpsb_send_packet(packet);
1583 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1588 /* Perform a few high-level IRM responsibilities. */
1589 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1593 /* if irm_id == -1 then there is no IRM on this bus */
1594 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1597 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1598 host->csr.broadcast_channel |= 0x40000000;
1600 /* If there is no bus manager then we should set the root node's
1601 * force_root bit to promote bus stability per the 1394
1602 * spec. (8.4.2.6) */
1603 if (host->busmgr_id == 0xffff && host->node_count > 1)
1605 u16 root_node = host->node_count - 1;
1607 /* get cycle master capability flag from root node */
1608 if (host->is_cycmst ||
1609 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1610 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1611 &bc, sizeof(quadlet_t)) &&
1612 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1613 hpsb_send_phy_config(host, root_node, -1);
1615 HPSB_DEBUG("The root node is not cycle master capable; "
1616 "selecting a new root node and resetting...");
1619 /* Oh screw it! Just leave the bus as it is */
1620 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1624 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1625 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1631 /* Some devices suspend their ports while being connected to an inactive
1632 * host adapter, i.e. if connected before the low-level driver is
1633 * loaded. They become visible either when physically unplugged and
1634 * replugged, or when receiving a resume packet. Send one once. */
1635 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1636 host->resume_packet_sent = 1;
1641 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1642 * everything we can do, otherwise issue a bus reset and try to become the IRM
1644 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1649 if (hpsb_disable_irm || host->is_irm)
1652 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1653 get_hpsb_generation(host),
1654 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1655 &bc, sizeof(quadlet_t));
1657 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1658 /* The current irm node does not have a valid BROADCAST_CHANNEL
1659 * register and we do, so reset the bus with force_root set */
1660 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1663 /* Oh screw it! Just leave the bus as it is */
1664 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1668 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1669 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1677 static int nodemgr_host_thread(void *__hi)
1679 struct host_info *hi = (struct host_info *)__hi;
1680 struct hpsb_host *host = hi->host;
1681 unsigned int g, generation = 0;
1682 int i, reset_cycles = 0;
1684 /* Setup our device-model entries */
1685 nodemgr_create_host_dev_files(host);
1688 /* Sleep until next bus reset */
1689 set_current_state(TASK_INTERRUPTIBLE);
1690 if (get_hpsb_generation(host) == generation)
1692 __set_current_state(TASK_RUNNING);
1694 /* Thread may have been woken up to freeze or to exit */
1695 if (try_to_freeze())
1697 if (kthread_should_stop())
1700 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1701 if (try_to_freeze())
1706 /* Pause for 1/4 second in 1/16 second intervals,
1707 * to make sure things settle down. */
1708 g = get_hpsb_generation(host);
1709 for (i = 0; i < 4 ; i++) {
1710 if (msleep_interruptible(63) || kthread_should_stop())
1713 /* Now get the generation in which the node ID's we collect
1714 * are valid. During the bus scan we will use this generation
1715 * for the read transactions, so that if another reset occurs
1716 * during the scan the transactions will fail instead of
1717 * returning bogus data. */
1718 generation = get_hpsb_generation(host);
1720 /* If we get a reset before we are done waiting, then
1721 * start the the waiting over again */
1722 if (generation != g)
1723 g = generation, i = 0;
1726 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1727 !nodemgr_do_irm_duties(host, reset_cycles)) {
1729 mutex_unlock(&nodemgr_serialize);
1734 /* Scan our nodes to get the bus options and create node
1735 * entries. This does not do the sysfs stuff, since that
1736 * would trigger uevents and such, which is a bad idea at
1738 nodemgr_node_scan(hi, generation);
1740 /* This actually does the full probe, with sysfs
1742 nodemgr_node_probe(hi, generation);
1744 /* Update some of our sysfs symlinks */
1745 nodemgr_update_host_dev_links(host);
1747 mutex_unlock(&nodemgr_serialize);
1750 mutex_unlock(&nodemgr_serialize);
1752 HPSB_VERBOSE("NodeMgr: Exiting thread");
1756 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1758 struct class *class = &hpsb_host_class;
1759 struct class_device *cdev;
1760 struct hpsb_host *host;
1763 down_read(&class->subsys.rwsem);
1764 list_for_each_entry(cdev, &class->children, node) {
1765 host = container_of(cdev, struct hpsb_host, class_dev);
1767 if ((error = cb(host, __data)))
1770 up_read(&class->subsys.rwsem);
1775 /* The following four convenience functions use a struct node_entry
1776 * for addressing a node on the bus. They are intended for use by any
1777 * process context, not just the nodemgr thread, so we need to be a
1778 * little careful when reading out the node ID and generation. The
1779 * thing that can go wrong is that we get the node ID, then a bus
1780 * reset occurs, and then we read the generation. The node ID is
1781 * possibly invalid, but the generation is current, and we end up
1782 * sending a packet to a the wrong node.
1784 * The solution is to make sure we read the generation first, so that
1785 * if a reset occurs in the process, we end up with a stale generation
1786 * and the transactions will fail instead of silently using wrong node
1790 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1792 pkt->host = ne->host;
1793 pkt->generation = ne->generation;
1795 pkt->node_id = ne->nodeid;
1798 int hpsb_node_write(struct node_entry *ne, u64 addr,
1799 quadlet_t *buffer, size_t length)
1801 unsigned int generation = ne->generation;
1804 return hpsb_write(ne->host, ne->nodeid, generation,
1805 addr, buffer, length);
1808 static void nodemgr_add_host(struct hpsb_host *host)
1810 struct host_info *hi;
1812 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1814 HPSB_ERR("NodeMgr: out of memory in add host");
1818 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1820 if (IS_ERR(hi->thread)) {
1821 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1822 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1826 static void nodemgr_host_reset(struct hpsb_host *host)
1828 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1831 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1832 wake_up_process(hi->thread);
1836 static void nodemgr_remove_host(struct hpsb_host *host)
1838 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1841 kthread_stop(hi->thread);
1842 nodemgr_remove_host_dev(&host->device);
1846 static struct hpsb_highlevel nodemgr_highlevel = {
1847 .name = "Node manager",
1848 .add_host = nodemgr_add_host,
1849 .host_reset = nodemgr_host_reset,
1850 .remove_host = nodemgr_remove_host,
1853 int init_ieee1394_nodemgr(void)
1857 ret = class_register(&nodemgr_ne_class);
1861 ret = class_register(&nodemgr_ud_class);
1863 class_unregister(&nodemgr_ne_class);
1867 hpsb_register_highlevel(&nodemgr_highlevel);
1872 void cleanup_ieee1394_nodemgr(void)
1874 hpsb_unregister_highlevel(&nodemgr_highlevel);
1876 class_unregister(&nodemgr_ud_class);
1877 class_unregister(&nodemgr_ne_class);