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/config.h>
14 #include <linux/list.h>
15 #include <linux/slab.h>
16 #include <linux/smp_lock.h>
17 #include <linux/interrupt.h>
18 #include <linux/kmod.h>
19 #include <linux/completion.h>
20 #include <linux/delay.h>
21 #include <linux/pci.h>
22 #include <linux/moduleparam.h>
23 #include <asm/atomic.h>
25 #include "ieee1394_types.h"
27 #include "ieee1394_core.h"
29 #include "ieee1394_transactions.h"
30 #include "highlevel.h"
34 static int ignore_drivers;
35 module_param(ignore_drivers, int, 0444);
36 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
38 struct nodemgr_csr_info {
39 struct hpsb_host *host;
41 unsigned int generation;
42 unsigned int speed_unverified:1;
46 static char *nodemgr_find_oui_name(int oui)
48 #ifdef CONFIG_IEEE1394_OUI_DB
49 extern struct oui_list_struct {
55 for (i = 0; oui_list[i].name; i++)
56 if (oui_list[i].oui == oui)
57 return oui_list[i].name;
63 * Correct the speed map entry. This is necessary
64 * - for nodes with link speed < phy speed,
65 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
66 * A possible speed is determined by trial and error, using quadlet reads.
68 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
72 u8 i, *speed, old_speed, good_speed;
75 speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid);
77 good_speed = IEEE1394_SPEED_MAX + 1;
79 /* Try every speed from S100 to old_speed.
80 * If we did it the other way around, a too low speed could be caught
81 * if the retry succeeded for some other reason, e.g. because the link
82 * just finished its initialization. */
83 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
85 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
86 &q, sizeof(quadlet_t));
92 if (good_speed <= IEEE1394_SPEED_MAX) {
93 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
94 NODE_BUS_ARGS(ci->host, ci->nodeid),
95 hpsb_speedto_str[good_speed]);
97 ci->speed_unverified = 0;
104 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
105 void *buffer, void *__ci)
107 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
111 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
114 ci->speed_unverified = 0;
117 /* Give up after 3rd failure. */
121 /* The ieee1394_core guessed the node's speed capability from
122 * the self ID. Check whether a lower speed works. */
123 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
124 ret = nodemgr_check_speed(ci, addr, buffer);
128 if (msleep_interruptible(334))
134 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
136 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
139 static struct csr1212_bus_ops nodemgr_csr_ops = {
140 .bus_read = nodemgr_bus_read,
141 .get_max_rom = nodemgr_get_max_rom
146 * Basically what we do here is start off retrieving the bus_info block.
147 * From there will fill in some info about the node, verify it is of IEEE
148 * 1394 type, and that the crc checks out ok. After that we start off with
149 * the root directory, and subdirectories. To do this, we retrieve the
150 * quadlet header for a directory, find out the length, and retrieve the
151 * complete directory entry (be it a leaf or a directory). We then process
152 * it and add the info to our structure for that particular node.
154 * We verify CRC's along the way for each directory/block/leaf. The entire
155 * node structure is generic, and simply stores the information in a way
156 * that's easy to parse by the protocol interface.
160 * The nodemgr relies heavily on the Driver Model for device callbacks and
161 * driver/device mappings. The old nodemgr used to handle all this itself,
162 * but now we are much simpler because of the LDM.
165 static DECLARE_MUTEX(nodemgr_serialize);
168 struct hpsb_host *host;
169 struct list_head list;
170 struct completion exited;
171 struct semaphore reset_sem;
173 char daemon_name[15];
177 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
178 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
179 char *buffer, int buffer_size);
180 static void nodemgr_resume_ne(struct node_entry *ne);
181 static void nodemgr_remove_ne(struct node_entry *ne);
182 static struct node_entry *find_entry_by_guid(u64 guid);
184 struct bus_type ieee1394_bus_type = {
186 .match = nodemgr_bus_match,
189 static void host_cls_release(struct class_device *class_dev)
191 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
194 struct class hpsb_host_class = {
195 .name = "ieee1394_host",
196 .release = host_cls_release,
199 static void ne_cls_release(struct class_device *class_dev)
201 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
204 static struct class nodemgr_ne_class = {
205 .name = "ieee1394_node",
206 .release = ne_cls_release,
209 static void ud_cls_release(struct class_device *class_dev)
211 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
214 /* The name here is only so that unit directory hotplug works with old
215 * style hotplug, which only ever did unit directories anyway. */
216 static struct class nodemgr_ud_class = {
218 .release = ud_cls_release,
219 .uevent = nodemgr_uevent,
222 static struct hpsb_highlevel nodemgr_highlevel;
225 static void nodemgr_release_ud(struct device *dev)
227 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
229 if (ud->vendor_name_kv)
230 csr1212_release_keyval(ud->vendor_name_kv);
231 if (ud->model_name_kv)
232 csr1212_release_keyval(ud->model_name_kv);
237 static void nodemgr_release_ne(struct device *dev)
239 struct node_entry *ne = container_of(dev, struct node_entry, device);
241 if (ne->vendor_name_kv)
242 csr1212_release_keyval(ne->vendor_name_kv);
248 static void nodemgr_release_host(struct device *dev)
250 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
252 csr1212_destroy_csr(host->csr.rom);
257 static int nodemgr_ud_platform_data;
259 static struct device nodemgr_dev_template_ud = {
260 .bus = &ieee1394_bus_type,
261 .release = nodemgr_release_ud,
262 .platform_data = &nodemgr_ud_platform_data,
265 static struct device nodemgr_dev_template_ne = {
266 .bus = &ieee1394_bus_type,
267 .release = nodemgr_release_ne,
270 struct device nodemgr_dev_template_host = {
271 .bus = &ieee1394_bus_type,
272 .release = nodemgr_release_host,
276 #define fw_attr(class, class_type, field, type, format_string) \
277 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
280 class = container_of(dev, class_type, device); \
281 return sprintf(buf, format_string, (type)class->field); \
283 static struct device_attribute dev_attr_##class##_##field = { \
284 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
285 .show = fw_show_##class##_##field, \
288 #define fw_attr_td(class, class_type, td_kv) \
289 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
292 class_type *class = container_of(dev, class_type, device); \
293 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
295 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
297 while ((buf + len - 1) == '\0') \
303 static struct device_attribute dev_attr_##class##_##td_kv = { \
304 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
305 .show = fw_show_##class##_##td_kv, \
309 #define fw_drv_attr(field, type, format_string) \
310 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
312 struct hpsb_protocol_driver *driver; \
313 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
314 return sprintf(buf, format_string, (type)driver->field);\
316 static struct driver_attribute driver_attr_drv_##field = { \
317 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
318 .show = fw_drv_show_##field, \
322 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
324 struct node_entry *ne = container_of(dev, struct node_entry, device);
326 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
327 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
329 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
330 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
333 ne->busopt.cyc_clk_acc);
335 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
338 /* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically
339 * here, therefore displayed values may be occasionally wrong. */
340 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
342 struct node_entry *ne = container_of(dev, struct node_entry, device);
343 return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64));
345 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
348 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
350 struct node_entry *ne = container_of(dev, struct node_entry, device);
351 return sprintf(buf, "%u\n", ne->tpool->allocations);
353 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
356 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
358 struct node_entry *ne = container_of(dev, struct node_entry, device);
359 #if (BITS_PER_LONG <= 32)
360 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
362 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
365 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
368 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
370 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
371 int state = simple_strtoul(buf, NULL, 10);
374 down_write(&dev->bus->subsys.rwsem);
375 device_release_driver(dev);
376 ud->ignore_driver = 1;
377 up_write(&dev->bus->subsys.rwsem);
379 ud->ignore_driver = 0;
383 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
385 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
387 return sprintf(buf, "%d\n", ud->ignore_driver);
389 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
392 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
394 struct node_entry *ne;
395 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
397 ne = find_entry_by_guid(guid);
399 if (ne == NULL || !ne->in_limbo)
402 nodemgr_remove_ne(ne);
406 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
408 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
410 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
412 static int nodemgr_rescan_bus_thread(void *__unused)
414 /* No userlevel access needed */
415 daemonize("kfwrescan");
417 bus_rescan_devices(&ieee1394_bus_type);
422 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
424 int state = simple_strtoul(buf, NULL, 10);
426 /* Don't wait for this, or care about errors. Root could do
427 * something stupid and spawn this a lot of times, but that's
430 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
434 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
436 return sprintf(buf, "You can force a rescan of the bus for "
437 "drivers by writing a 1 to this file\n");
439 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
442 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
444 int state = simple_strtoul(buf, NULL, 10);
453 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
455 return sprintf(buf, "%d\n", ignore_drivers);
457 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
460 struct bus_attribute *const fw_bus_attrs[] = {
461 &bus_attr_destroy_node,
463 &bus_attr_ignore_drivers,
468 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
469 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
471 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
472 fw_attr_td(ne, struct node_entry, vendor_name_kv)
473 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
475 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
476 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
477 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
478 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
480 static struct device_attribute *const fw_ne_attrs[] = {
482 &dev_attr_ne_guid_vendor_id,
483 &dev_attr_ne_capabilities,
484 &dev_attr_ne_vendor_id,
486 &dev_attr_bus_options,
487 &dev_attr_tlabels_free,
488 &dev_attr_tlabels_allocations,
489 &dev_attr_tlabels_mask,
494 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
495 fw_attr(ud, struct unit_directory, length, int, "%d\n")
496 /* These are all dependent on the value being provided */
497 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
498 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
499 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
500 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
501 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
502 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
503 fw_attr_td(ud, struct unit_directory, model_name_kv)
505 static struct device_attribute *const fw_ud_attrs[] = {
506 &dev_attr_ud_address,
508 &dev_attr_ignore_driver,
512 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
513 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
514 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
515 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
516 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
517 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
518 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
519 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
521 static struct device_attribute *const fw_host_attrs[] = {
522 &dev_attr_host_node_count,
523 &dev_attr_host_selfid_count,
524 &dev_attr_host_nodes_active,
525 &dev_attr_host_in_bus_reset,
526 &dev_attr_host_is_root,
527 &dev_attr_host_is_cycmst,
528 &dev_attr_host_is_irm,
529 &dev_attr_host_is_busmgr,
533 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
535 struct hpsb_protocol_driver *driver;
536 struct ieee1394_device_id *id;
540 driver = container_of(drv, struct hpsb_protocol_driver, driver);
542 for (id = driver->id_table; id->match_flags != 0; id++) {
545 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
546 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
547 scratch = buf + length;
551 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
552 length += sprintf(scratch, "%smodel_id=0x%06x",
553 need_coma++ ? "," : "",
555 scratch = buf + length;
558 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
559 length += sprintf(scratch, "%sspecifier_id=0x%06x",
560 need_coma++ ? "," : "",
562 scratch = buf + length;
565 if (id->match_flags & IEEE1394_MATCH_VERSION) {
566 length += sprintf(scratch, "%sversion=0x%06x",
567 need_coma++ ? "," : "",
569 scratch = buf + length;
580 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
583 fw_drv_attr(name, const char *, "%s\n")
585 static struct driver_attribute *const fw_drv_attrs[] = {
586 &driver_attr_drv_name,
587 &driver_attr_device_ids,
591 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
593 struct device_driver *drv = &driver->driver;
596 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
597 driver_create_file(drv, fw_drv_attrs[i]);
601 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
603 struct device_driver *drv = &driver->driver;
606 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
607 driver_remove_file(drv, fw_drv_attrs[i]);
611 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
613 struct device *dev = &ne->device;
616 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
617 device_create_file(dev, fw_ne_attrs[i]);
621 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
623 struct device *dev = &host->device;
626 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
627 device_create_file(dev, fw_host_attrs[i]);
631 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
633 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
635 struct device *dev = &host->device;
636 struct node_entry *ne;
638 sysfs_remove_link(&dev->kobj, "irm_id");
639 sysfs_remove_link(&dev->kobj, "busmgr_id");
640 sysfs_remove_link(&dev->kobj, "host_id");
642 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
643 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
644 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
645 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
646 if ((ne = find_entry_by_nodeid(host, host->node_id)))
647 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
650 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
652 struct device *dev = &ud->device;
655 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
656 device_create_file(dev, fw_ud_attrs[i]);
658 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
659 device_create_file(dev, &dev_attr_ud_specifier_id);
661 if (ud->flags & UNIT_DIRECTORY_VERSION)
662 device_create_file(dev, &dev_attr_ud_version);
664 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
665 device_create_file(dev, &dev_attr_ud_vendor_id);
666 if (ud->vendor_name_kv)
667 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
670 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
671 device_create_file(dev, &dev_attr_ud_model_id);
672 if (ud->model_name_kv)
673 device_create_file(dev, &dev_attr_ud_model_name_kv);
678 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
680 struct hpsb_protocol_driver *driver;
681 struct unit_directory *ud;
682 struct ieee1394_device_id *id;
684 /* We only match unit directories */
685 if (dev->platform_data != &nodemgr_ud_platform_data)
688 ud = container_of(dev, struct unit_directory, device);
689 driver = container_of(drv, struct hpsb_protocol_driver, driver);
691 if (ud->ne->in_limbo || ud->ignore_driver)
694 for (id = driver->id_table; id->match_flags != 0; id++) {
695 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
696 id->vendor_id != ud->vendor_id)
699 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
700 id->model_id != ud->model_id)
703 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
704 id->specifier_id != ud->specifier_id)
707 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
708 id->version != ud->version)
718 static void nodemgr_remove_uds(struct node_entry *ne)
720 struct class_device *cdev, *next;
721 struct unit_directory *ud;
723 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
724 ud = container_of(cdev, struct unit_directory, class_dev);
729 class_device_unregister(&ud->class_dev);
730 device_unregister(&ud->device);
735 static void nodemgr_remove_ne(struct node_entry *ne)
737 struct device *dev = &ne->device;
739 dev = get_device(&ne->device);
743 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
744 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
746 nodemgr_remove_uds(ne);
748 class_device_unregister(&ne->class_dev);
749 device_unregister(dev);
754 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
756 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
760 static void nodemgr_remove_host_dev(struct device *dev)
762 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
763 sysfs_remove_link(&dev->kobj, "irm_id");
764 sysfs_remove_link(&dev->kobj, "busmgr_id");
765 sysfs_remove_link(&dev->kobj, "host_id");
769 static void nodemgr_update_bus_options(struct node_entry *ne)
771 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
772 static const u16 mr[] = { 4, 64, 1024, 0};
774 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
776 ne->busopt.irmc = (busoptions >> 31) & 1;
777 ne->busopt.cmc = (busoptions >> 30) & 1;
778 ne->busopt.isc = (busoptions >> 29) & 1;
779 ne->busopt.bmc = (busoptions >> 28) & 1;
780 ne->busopt.pmc = (busoptions >> 27) & 1;
781 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
782 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
783 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
784 ne->busopt.generation = (busoptions >> 4) & 0xf;
785 ne->busopt.lnkspd = busoptions & 0x7;
787 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
788 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
789 busoptions, ne->busopt.irmc, ne->busopt.cmc,
790 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
791 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
792 mr[ne->busopt.max_rom],
793 ne->busopt.generation, ne->busopt.lnkspd);
797 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
798 struct host_info *hi, nodeid_t nodeid,
799 unsigned int generation)
801 struct hpsb_host *host = hi->host;
802 struct node_entry *ne;
804 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
808 ne->tpool = &host->tpool[nodeid & NODE_MASK];
812 ne->generation = generation;
816 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
817 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
820 memcpy(&ne->device, &nodemgr_dev_template_ne,
822 ne->device.parent = &host->device;
823 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
824 (unsigned long long)(ne->guid));
826 ne->class_dev.dev = &ne->device;
827 ne->class_dev.class = &nodemgr_ne_class;
828 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
829 (unsigned long long)(ne->guid));
831 device_register(&ne->device);
832 class_device_register(&ne->class_dev);
833 get_device(&ne->device);
835 if (ne->guid_vendor_oui)
836 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
837 nodemgr_create_ne_dev_files(ne);
839 nodemgr_update_bus_options(ne);
841 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
842 (host->node_id == nodeid) ? "Host" : "Node",
843 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
849 static struct node_entry *find_entry_by_guid(u64 guid)
851 struct class *class = &nodemgr_ne_class;
852 struct class_device *cdev;
853 struct node_entry *ne, *ret_ne = NULL;
855 down_read(&class->subsys.rwsem);
856 list_for_each_entry(cdev, &class->children, node) {
857 ne = container_of(cdev, struct node_entry, class_dev);
859 if (ne->guid == guid) {
864 up_read(&class->subsys.rwsem);
870 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
872 struct class *class = &nodemgr_ne_class;
873 struct class_device *cdev;
874 struct node_entry *ne, *ret_ne = NULL;
876 down_read(&class->subsys.rwsem);
877 list_for_each_entry(cdev, &class->children, node) {
878 ne = container_of(cdev, struct node_entry, class_dev);
880 if (ne->host == host && ne->nodeid == nodeid) {
885 up_read(&class->subsys.rwsem);
891 static void nodemgr_register_device(struct node_entry *ne,
892 struct unit_directory *ud, struct device *parent)
894 memcpy(&ud->device, &nodemgr_dev_template_ud,
897 ud->device.parent = parent;
899 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
900 ne->device.bus_id, ud->id);
902 ud->class_dev.dev = &ud->device;
903 ud->class_dev.class = &nodemgr_ud_class;
904 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
905 ne->device.bus_id, ud->id);
907 device_register(&ud->device);
908 class_device_register(&ud->class_dev);
909 get_device(&ud->device);
912 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
913 nodemgr_create_ud_dev_files(ud);
917 /* This implementation currently only scans the config rom and its
918 * immediate unit directories looking for software_id and
919 * software_version entries, in order to get driver autoloading working. */
920 static struct unit_directory *nodemgr_process_unit_directory
921 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
922 unsigned int *id, struct unit_directory *parent)
924 struct unit_directory *ud;
925 struct unit_directory *ud_child = NULL;
926 struct csr1212_dentry *dentry;
927 struct csr1212_keyval *kv;
930 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
932 goto unit_directory_error;
935 ud->ignore_driver = ignore_drivers;
936 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
940 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
941 switch (kv->key.id) {
942 case CSR1212_KV_ID_VENDOR:
943 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
944 ud->vendor_id = kv->value.immediate;
945 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
948 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
952 case CSR1212_KV_ID_MODEL:
953 ud->model_id = kv->value.immediate;
954 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
957 case CSR1212_KV_ID_SPECIFIER_ID:
958 ud->specifier_id = kv->value.immediate;
959 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
962 case CSR1212_KV_ID_VERSION:
963 ud->version = kv->value.immediate;
964 ud->flags |= UNIT_DIRECTORY_VERSION;
967 case CSR1212_KV_ID_DESCRIPTOR:
968 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
969 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
970 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
971 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
972 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
973 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
974 switch (last_key_id) {
975 case CSR1212_KV_ID_VENDOR:
976 ud->vendor_name_kv = kv;
977 csr1212_keep_keyval(kv);
980 case CSR1212_KV_ID_MODEL:
981 ud->model_name_kv = kv;
982 csr1212_keep_keyval(kv);
986 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
989 case CSR1212_KV_ID_DEPENDENT_INFO:
990 /* Logical Unit Number */
991 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
992 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
993 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
995 goto unit_directory_error;
996 memcpy(ud_child, ud, sizeof(*ud_child));
997 nodemgr_register_device(ne, ud_child, &ne->device);
1002 ud->lun = kv->value.immediate;
1003 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1005 /* Logical Unit Directory */
1006 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1007 /* This should really be done in SBP2 as this is
1008 * doing SBP2 specific parsing.
1011 /* first register the parent unit */
1012 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1013 if (ud->device.bus != &ieee1394_bus_type)
1014 nodemgr_register_device(ne, ud, &ne->device);
1016 /* process the child unit */
1017 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1019 if (ud_child == NULL)
1022 /* inherit unspecified values, the driver core picks it up */
1023 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1024 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1026 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1027 ud_child->model_id = ud->model_id;
1029 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1030 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1032 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1033 ud_child->specifier_id = ud->specifier_id;
1035 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1036 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1038 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1039 ud_child->version = ud->version;
1042 /* register the child unit */
1043 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1044 nodemgr_register_device(ne, ud_child, &ud->device);
1052 last_key_id = kv->key.id;
1055 /* do not process child units here and only if not already registered */
1056 if (!parent && ud->device.bus != &ieee1394_bus_type)
1057 nodemgr_register_device(ne, ud, &ne->device);
1061 unit_directory_error:
1067 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1069 unsigned int ud_id = 0;
1070 struct csr1212_dentry *dentry;
1071 struct csr1212_keyval *kv;
1074 ne->needs_probe = 0;
1076 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1077 switch (kv->key.id) {
1078 case CSR1212_KV_ID_VENDOR:
1079 ne->vendor_id = kv->value.immediate;
1082 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1085 case CSR1212_KV_ID_NODE_CAPABILITIES:
1086 ne->capabilities = kv->value.immediate;
1089 case CSR1212_KV_ID_UNIT:
1090 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1093 case CSR1212_KV_ID_DESCRIPTOR:
1094 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1095 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1096 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1097 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1098 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1099 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1100 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1101 ne->vendor_name_kv = kv;
1102 csr1212_keep_keyval(kv);
1107 last_key_id = kv->key.id;
1111 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1112 if (ne->vendor_name_kv)
1113 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1116 #ifdef CONFIG_HOTPLUG
1118 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1119 char *buffer, int buffer_size)
1121 struct unit_directory *ud;
1124 /* ieee1394:venNmoNspNverN */
1125 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1130 ud = container_of(cdev, struct unit_directory, class_dev);
1132 if (ud->ne->in_limbo || ud->ignore_driver)
1135 #define PUT_ENVP(fmt,val) \
1138 envp[i++] = buffer; \
1139 printed = snprintf(buffer, buffer_size - length, \
1141 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1143 length += printed+1; \
1144 buffer += printed+1; \
1147 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1148 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1149 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1150 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1151 PUT_ENVP("VERSION=%06x", ud->version);
1152 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1157 PUT_ENVP("MODALIAS=%s", buf);
1168 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1169 char *buffer, int buffer_size)
1174 #endif /* CONFIG_HOTPLUG */
1177 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1181 /* This will cause a probe for devices */
1182 ret = driver_register(&driver->driver);
1184 nodemgr_create_drv_files(driver);
1189 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1191 nodemgr_remove_drv_files(driver);
1192 /* This will subsequently disconnect all devices that our driver
1193 * is attached to. */
1194 driver_unregister(&driver->driver);
1199 * This function updates nodes that were present on the bus before the
1200 * reset and still are after the reset. The nodeid and the config rom
1201 * may have changed, and the drivers managing this device must be
1202 * informed that this device just went through a bus reset, to allow
1203 * the to take whatever actions required.
1205 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1206 struct host_info *hi, nodeid_t nodeid,
1207 unsigned int generation)
1209 if (ne->nodeid != nodeid) {
1210 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1211 NODE_BUS_ARGS(ne->host, ne->nodeid),
1212 NODE_BUS_ARGS(ne->host, nodeid));
1213 ne->nodeid = nodeid;
1216 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1217 kfree(ne->csr->private);
1218 csr1212_destroy_csr(ne->csr);
1221 /* If the node's configrom generation has changed, we
1222 * unregister all the unit directories. */
1223 nodemgr_remove_uds(ne);
1225 nodemgr_update_bus_options(ne);
1227 /* Mark the node as new, so it gets re-probed */
1228 ne->needs_probe = 1;
1230 /* old cache is valid, so update its generation */
1231 struct nodemgr_csr_info *ci = ne->csr->private;
1232 ci->generation = generation;
1233 /* free the partially filled now unneeded new cache */
1234 kfree(csr->private);
1235 csr1212_destroy_csr(csr);
1239 nodemgr_resume_ne(ne);
1241 /* Mark the node current */
1242 ne->generation = generation;
1247 static void nodemgr_node_scan_one(struct host_info *hi,
1248 nodeid_t nodeid, int generation)
1250 struct hpsb_host *host = hi->host;
1251 struct node_entry *ne;
1253 struct csr1212_csr *csr;
1254 struct nodemgr_csr_info *ci;
1256 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1261 ci->nodeid = nodeid;
1262 ci->generation = generation;
1263 ci->speed_unverified =
1264 host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100;
1266 /* We need to detect when the ConfigROM's generation has changed,
1267 * so we only update the node's info when it needs to be. */
1269 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1270 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1271 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1272 NODE_BUS_ARGS(host, nodeid));
1274 csr1212_destroy_csr(csr);
1279 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1280 /* This isn't a 1394 device, but we let it slide. There
1281 * was a report of a device with broken firmware which
1282 * reported '2394' instead of '1394', which is obviously a
1283 * mistake. One would hope that a non-1394 device never
1284 * gets connected to Firewire bus. If someone does, we
1285 * shouldn't be held responsible, so we'll allow it with a
1287 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1288 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1291 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1292 ne = find_entry_by_guid(guid);
1294 if (ne && ne->host != host && ne->in_limbo) {
1295 /* Must have moved this device from one host to another */
1296 nodemgr_remove_ne(ne);
1301 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1303 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1309 static void nodemgr_node_scan(struct host_info *hi, int generation)
1312 struct hpsb_host *host = hi->host;
1313 struct selfid *sid = (struct selfid *)host->topology_map;
1314 nodeid_t nodeid = LOCAL_BUS;
1316 /* Scan each node on the bus */
1317 for (count = host->selfid_count; count; count--, sid++) {
1321 if (!sid->link_active) {
1325 nodemgr_node_scan_one(hi, nodeid++, generation);
1330 static void nodemgr_suspend_ne(struct node_entry *ne)
1332 struct class_device *cdev;
1333 struct unit_directory *ud;
1335 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1336 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1339 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1341 down_write(&ne->device.bus->subsys.rwsem);
1342 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1343 ud = container_of(cdev, struct unit_directory, class_dev);
1348 if (ud->device.driver &&
1349 (!ud->device.driver->suspend ||
1350 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1351 device_release_driver(&ud->device);
1353 up_write(&ne->device.bus->subsys.rwsem);
1357 static void nodemgr_resume_ne(struct node_entry *ne)
1359 struct class_device *cdev;
1360 struct unit_directory *ud;
1363 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1365 down_read(&ne->device.bus->subsys.rwsem);
1366 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1367 ud = container_of(cdev, struct unit_directory, class_dev);
1372 if (ud->device.driver && ud->device.driver->resume)
1373 ud->device.driver->resume(&ud->device);
1375 up_read(&ne->device.bus->subsys.rwsem);
1377 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1378 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1382 static void nodemgr_update_pdrv(struct node_entry *ne)
1384 struct unit_directory *ud;
1385 struct hpsb_protocol_driver *pdrv;
1386 struct class *class = &nodemgr_ud_class;
1387 struct class_device *cdev;
1389 down_read(&class->subsys.rwsem);
1390 list_for_each_entry(cdev, &class->children, node) {
1391 ud = container_of(cdev, struct unit_directory, class_dev);
1392 if (ud->ne != ne || !ud->device.driver)
1395 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1397 if (pdrv->update && pdrv->update(ud)) {
1398 down_write(&ud->device.bus->subsys.rwsem);
1399 device_release_driver(&ud->device);
1400 up_write(&ud->device.bus->subsys.rwsem);
1403 up_read(&class->subsys.rwsem);
1407 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1408 * seems like an optional service but in the end it is practically mandatory
1409 * as a consequence of these clauses.
1411 * Note that we cannot do a broadcast write to all nodes at once because some
1412 * pre-1394a devices would hang. */
1413 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1415 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1416 quadlet_t bc_remote, bc_local;
1419 if (!ne->host->is_irm || ne->generation != generation ||
1420 ne->nodeid == ne->host->node_id)
1423 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1425 /* Check if the register is implemented and 1394a compliant. */
1426 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1428 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1429 bc_remote != bc_local)
1430 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1434 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1438 if (ne->host != hi->host || ne->in_limbo)
1441 dev = get_device(&ne->device);
1445 nodemgr_irm_write_bc(ne, generation);
1447 /* If "needs_probe", then this is either a new or changed node we
1448 * rescan totally. If the generation matches for an existing node
1449 * (one that existed prior to the bus reset) we send update calls
1450 * down to the drivers. Otherwise, this is a dead node and we
1452 if (ne->needs_probe)
1453 nodemgr_process_root_directory(hi, ne);
1454 else if (ne->generation == generation)
1455 nodemgr_update_pdrv(ne);
1457 nodemgr_suspend_ne(ne);
1463 static void nodemgr_node_probe(struct host_info *hi, int generation)
1465 struct hpsb_host *host = hi->host;
1466 struct class *class = &nodemgr_ne_class;
1467 struct class_device *cdev;
1468 struct node_entry *ne;
1470 /* Do some processing of the nodes we've probed. This pulls them
1471 * into the sysfs layer if needed, and can result in processing of
1472 * unit-directories, or just updating the node and it's
1475 * Run updates before probes. Usually, updates are time-critical
1476 * while probes are time-consuming. (Well, those probes need some
1477 * improvement...) */
1479 down_read(&class->subsys.rwsem);
1480 list_for_each_entry(cdev, &class->children, node) {
1481 ne = container_of(cdev, struct node_entry, class_dev);
1482 if (!ne->needs_probe)
1483 nodemgr_probe_ne(hi, ne, generation);
1485 list_for_each_entry(cdev, &class->children, node) {
1486 ne = container_of(cdev, struct node_entry, class_dev);
1487 if (ne->needs_probe)
1488 nodemgr_probe_ne(hi, ne, generation);
1490 up_read(&class->subsys.rwsem);
1493 /* If we had a bus reset while we were scanning the bus, it is
1494 * possible that we did not probe all nodes. In that case, we
1495 * skip the clean up for now, since we could remove nodes that
1496 * were still on the bus. The bus reset increased hi->reset_sem,
1497 * so there's a bus scan pending which will do the clean up
1500 * Now let's tell the bus to rescan our devices. This may seem
1501 * like overhead, but the driver-model core will only scan a
1502 * device for a driver when either the device is added, or when a
1503 * new driver is added. A bus reset is a good reason to rescan
1504 * devices that were there before. For example, an sbp2 device
1505 * may become available for login, if the host that held it was
1508 if (generation == get_hpsb_generation(host))
1509 bus_rescan_devices(&ieee1394_bus_type);
1514 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1516 struct hpsb_packet *packet;
1519 packet = hpsb_make_phypacket(host,
1520 EXTPHYPACKET_TYPE_RESUME |
1521 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1523 packet->no_waiter = 1;
1524 packet->generation = get_hpsb_generation(host);
1525 ret = hpsb_send_packet(packet);
1528 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1533 /* Perform a few high-level IRM responsibilities. */
1534 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1538 /* if irm_id == -1 then there is no IRM on this bus */
1539 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1542 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1543 host->csr.broadcast_channel |= 0x40000000;
1545 /* If there is no bus manager then we should set the root node's
1546 * force_root bit to promote bus stability per the 1394
1547 * spec. (8.4.2.6) */
1548 if (host->busmgr_id == 0xffff && host->node_count > 1)
1550 u16 root_node = host->node_count - 1;
1552 /* get cycle master capability flag from root node */
1553 if (host->is_cycmst ||
1554 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1555 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1556 &bc, sizeof(quadlet_t)) &&
1557 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1558 hpsb_send_phy_config(host, root_node, -1);
1560 HPSB_DEBUG("The root node is not cycle master capable; "
1561 "selecting a new root node and resetting...");
1564 /* Oh screw it! Just leave the bus as it is */
1565 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1569 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1570 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1576 /* Some devices suspend their ports while being connected to an inactive
1577 * host adapter, i.e. if connected before the low-level driver is
1578 * loaded. They become visible either when physically unplugged and
1579 * replugged, or when receiving a resume packet. Send one once. */
1580 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1581 host->resume_packet_sent = 1;
1586 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1587 * everything we can do, otherwise issue a bus reset and try to become the IRM
1589 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1594 if (hpsb_disable_irm || host->is_irm)
1597 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1598 get_hpsb_generation(host),
1599 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1600 &bc, sizeof(quadlet_t));
1602 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1603 /* The current irm node does not have a valid BROADCAST_CHANNEL
1604 * register and we do, so reset the bus with force_root set */
1605 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1608 /* Oh screw it! Just leave the bus as it is */
1609 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1613 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1614 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1622 static int nodemgr_host_thread(void *__hi)
1624 struct host_info *hi = (struct host_info *)__hi;
1625 struct hpsb_host *host = hi->host;
1626 int reset_cycles = 0;
1628 /* No userlevel access needed */
1629 daemonize(hi->daemon_name);
1631 /* Setup our device-model entries */
1632 nodemgr_create_host_dev_files(host);
1634 /* Sit and wait for a signal to probe the nodes on the bus. This
1635 * happens when we get a bus reset. */
1637 unsigned int generation = 0;
1640 if (down_interruptible(&hi->reset_sem) ||
1641 down_interruptible(&nodemgr_serialize)) {
1642 if (try_to_freeze())
1644 printk("NodeMgr: received unexpected signal?!\n" );
1649 up(&nodemgr_serialize);
1653 /* Pause for 1/4 second in 1/16 second intervals,
1654 * to make sure things settle down. */
1655 for (i = 0; i < 4 ; i++) {
1656 set_current_state(TASK_INTERRUPTIBLE);
1657 if (msleep_interruptible(63)) {
1658 up(&nodemgr_serialize);
1662 /* Now get the generation in which the node ID's we collect
1663 * are valid. During the bus scan we will use this generation
1664 * for the read transactions, so that if another reset occurs
1665 * during the scan the transactions will fail instead of
1666 * returning bogus data. */
1667 generation = get_hpsb_generation(host);
1669 /* If we get a reset before we are done waiting, then
1670 * start the the waiting over again */
1671 while (!down_trylock(&hi->reset_sem))
1674 /* Check the kill_me again */
1676 up(&nodemgr_serialize);
1681 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1682 !nodemgr_do_irm_duties(host, reset_cycles)) {
1684 up(&nodemgr_serialize);
1689 /* Scan our nodes to get the bus options and create node
1690 * entries. This does not do the sysfs stuff, since that
1691 * would trigger uevents and such, which is a bad idea at
1693 nodemgr_node_scan(hi, generation);
1695 /* This actually does the full probe, with sysfs
1697 nodemgr_node_probe(hi, generation);
1699 /* Update some of our sysfs symlinks */
1700 nodemgr_update_host_dev_links(host);
1702 up(&nodemgr_serialize);
1706 HPSB_VERBOSE("NodeMgr: Exiting thread");
1708 complete_and_exit(&hi->exited, 0);
1711 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1713 struct class *class = &hpsb_host_class;
1714 struct class_device *cdev;
1715 struct hpsb_host *host;
1718 down_read(&class->subsys.rwsem);
1719 list_for_each_entry(cdev, &class->children, node) {
1720 host = container_of(cdev, struct hpsb_host, class_dev);
1722 if ((error = cb(host, __data)))
1725 up_read(&class->subsys.rwsem);
1730 /* The following four convenience functions use a struct node_entry
1731 * for addressing a node on the bus. They are intended for use by any
1732 * process context, not just the nodemgr thread, so we need to be a
1733 * little careful when reading out the node ID and generation. The
1734 * thing that can go wrong is that we get the node ID, then a bus
1735 * reset occurs, and then we read the generation. The node ID is
1736 * possibly invalid, but the generation is current, and we end up
1737 * sending a packet to a the wrong node.
1739 * The solution is to make sure we read the generation first, so that
1740 * if a reset occurs in the process, we end up with a stale generation
1741 * and the transactions will fail instead of silently using wrong node
1745 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1747 pkt->host = ne->host;
1748 pkt->generation = ne->generation;
1750 pkt->node_id = ne->nodeid;
1753 int hpsb_node_write(struct node_entry *ne, u64 addr,
1754 quadlet_t *buffer, size_t length)
1756 unsigned int generation = ne->generation;
1759 return hpsb_write(ne->host, ne->nodeid, generation,
1760 addr, buffer, length);
1763 static void nodemgr_add_host(struct hpsb_host *host)
1765 struct host_info *hi;
1767 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1770 HPSB_ERR ("NodeMgr: out of memory in add host");
1775 init_completion(&hi->exited);
1776 sema_init(&hi->reset_sem, 0);
1778 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1780 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1783 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1784 hi->daemon_name, host->driver->name);
1785 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1792 static void nodemgr_host_reset(struct hpsb_host *host)
1794 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1797 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1800 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1805 static void nodemgr_remove_host(struct hpsb_host *host)
1807 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1814 wait_for_completion(&hi->exited);
1815 nodemgr_remove_host_dev(&host->device);
1818 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1819 host->driver->name);
1824 static struct hpsb_highlevel nodemgr_highlevel = {
1825 .name = "Node manager",
1826 .add_host = nodemgr_add_host,
1827 .host_reset = nodemgr_host_reset,
1828 .remove_host = nodemgr_remove_host,
1831 int init_ieee1394_nodemgr(void)
1835 ret = class_register(&nodemgr_ne_class);
1839 ret = class_register(&nodemgr_ud_class);
1841 class_unregister(&nodemgr_ne_class);
1845 hpsb_register_highlevel(&nodemgr_highlevel);
1850 void cleanup_ieee1394_nodemgr(void)
1852 hpsb_unregister_highlevel(&nodemgr_highlevel);
1854 class_unregister(&nodemgr_ud_class);
1855 class_unregister(&nodemgr_ne_class);