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/kernel.h>
12 #include <linux/config.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/smp_lock.h>
16 #include <linux/interrupt.h>
17 #include <linux/kmod.h>
18 #include <linux/completion.h>
19 #include <linux/delay.h>
20 #include <linux/pci.h>
21 #include <linux/moduleparam.h>
22 #include <linux/suspend.h>
23 #include <asm/atomic.h>
25 #include "ieee1394_types.h"
28 #include "ieee1394_transactions.h"
29 #include "highlevel.h"
33 static int ignore_drivers = 0;
34 module_param(ignore_drivers, int, 0444);
35 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
37 struct nodemgr_csr_info {
38 struct hpsb_host *host;
40 unsigned int generation;
44 static char *nodemgr_find_oui_name(int oui)
46 #ifdef CONFIG_IEEE1394_OUI_DB
47 extern struct oui_list_struct {
53 for (i = 0; oui_list[i].name; i++)
54 if (oui_list[i].oui == oui)
55 return oui_list[i].name;
61 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
62 void *buffer, void *__ci)
64 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
67 for (i = 0; i < 3; i++) {
68 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
73 if (msleep_interruptible(334))
80 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
82 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
85 static struct csr1212_bus_ops nodemgr_csr_ops = {
86 .bus_read = nodemgr_bus_read,
87 .get_max_rom = nodemgr_get_max_rom
92 * Basically what we do here is start off retrieving the bus_info block.
93 * From there will fill in some info about the node, verify it is of IEEE
94 * 1394 type, and that the crc checks out ok. After that we start off with
95 * the root directory, and subdirectories. To do this, we retrieve the
96 * quadlet header for a directory, find out the length, and retrieve the
97 * complete directory entry (be it a leaf or a directory). We then process
98 * it and add the info to our structure for that particular node.
100 * We verify CRC's along the way for each directory/block/leaf. The entire
101 * node structure is generic, and simply stores the information in a way
102 * that's easy to parse by the protocol interface.
106 * The nodemgr relies heavily on the Driver Model for device callbacks and
107 * driver/device mappings. The old nodemgr used to handle all this itself,
108 * but now we are much simpler because of the LDM.
111 static DECLARE_MUTEX(nodemgr_serialize);
114 struct hpsb_host *host;
115 struct list_head list;
116 struct completion exited;
117 struct semaphore reset_sem;
119 char daemon_name[15];
123 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
124 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
125 char *buffer, int buffer_size);
126 static void nodemgr_resume_ne(struct node_entry *ne);
127 static void nodemgr_remove_ne(struct node_entry *ne);
128 static struct node_entry *find_entry_by_guid(u64 guid);
130 struct bus_type ieee1394_bus_type = {
132 .match = nodemgr_bus_match,
135 static void host_cls_release(struct class_device *class_dev)
137 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
140 struct class hpsb_host_class = {
141 .name = "ieee1394_host",
142 .release = host_cls_release,
145 static void ne_cls_release(struct class_device *class_dev)
147 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
150 struct class nodemgr_ne_class = {
151 .name = "ieee1394_node",
152 .release = ne_cls_release,
155 static void ud_cls_release(struct class_device *class_dev)
157 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
160 /* The name here is only so that unit directory hotplug works with old
161 * style hotplug, which only ever did unit directories anyway. */
162 struct class nodemgr_ud_class = {
164 .release = ud_cls_release,
165 .hotplug = nodemgr_hotplug,
168 static struct hpsb_highlevel nodemgr_highlevel;
171 static void nodemgr_release_ud(struct device *dev)
173 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
175 if (ud->vendor_name_kv)
176 csr1212_release_keyval(ud->vendor_name_kv);
177 if (ud->model_name_kv)
178 csr1212_release_keyval(ud->model_name_kv);
183 static void nodemgr_release_ne(struct device *dev)
185 struct node_entry *ne = container_of(dev, struct node_entry, device);
187 if (ne->vendor_name_kv)
188 csr1212_release_keyval(ne->vendor_name_kv);
194 static void nodemgr_release_host(struct device *dev)
196 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
198 csr1212_destroy_csr(host->csr.rom);
203 static int nodemgr_ud_platform_data;
205 static struct device nodemgr_dev_template_ud = {
206 .bus = &ieee1394_bus_type,
207 .release = nodemgr_release_ud,
208 .platform_data = &nodemgr_ud_platform_data,
211 static struct device nodemgr_dev_template_ne = {
212 .bus = &ieee1394_bus_type,
213 .release = nodemgr_release_ne,
216 struct device nodemgr_dev_template_host = {
217 .bus = &ieee1394_bus_type,
218 .release = nodemgr_release_host,
222 #define fw_attr(class, class_type, field, type, format_string) \
223 static ssize_t fw_show_##class##_##field (struct device *dev, char *buf)\
226 class = container_of(dev, class_type, device); \
227 return sprintf(buf, format_string, (type)class->field); \
229 static struct device_attribute dev_attr_##class##_##field = { \
230 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
231 .show = fw_show_##class##_##field, \
234 #define fw_attr_td(class, class_type, td_kv) \
235 static ssize_t fw_show_##class##_##td_kv (struct device *dev, char *buf)\
238 class_type *class = container_of(dev, class_type, device); \
239 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
241 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
243 while ((buf + len - 1) == '\0') \
249 static struct device_attribute dev_attr_##class##_##td_kv = { \
250 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
251 .show = fw_show_##class##_##td_kv, \
255 #define fw_drv_attr(field, type, format_string) \
256 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
258 struct hpsb_protocol_driver *driver; \
259 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
260 return sprintf(buf, format_string, (type)driver->field);\
262 static struct driver_attribute driver_attr_drv_##field = { \
263 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
264 .show = fw_drv_show_##field, \
268 static ssize_t fw_show_ne_bus_options(struct device *dev, char *buf)
270 struct node_entry *ne = container_of(dev, struct node_entry, device);
272 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
273 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
275 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
276 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
279 ne->busopt.cyc_clk_acc);
281 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
284 static ssize_t fw_show_ne_tlabels_free(struct device *dev, char *buf)
286 struct node_entry *ne = container_of(dev, struct node_entry, device);
287 return sprintf(buf, "%d\n", atomic_read(&ne->tpool->count.count) + 1);
289 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
292 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, char *buf)
294 struct node_entry *ne = container_of(dev, struct node_entry, device);
295 return sprintf(buf, "%u\n", ne->tpool->allocations);
297 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
300 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, char *buf)
302 struct node_entry *ne = container_of(dev, struct node_entry, device);
303 #if (BITS_PER_LONG <= 32)
304 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
306 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
309 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
312 static ssize_t fw_set_ignore_driver(struct device *dev, const char *buf, size_t count)
314 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
315 int state = simple_strtoul(buf, NULL, 10);
318 down_write(&dev->bus->subsys.rwsem);
319 device_release_driver(dev);
320 ud->ignore_driver = 1;
321 up_write(&dev->bus->subsys.rwsem);
323 ud->ignore_driver = 0;
327 static ssize_t fw_get_ignore_driver(struct device *dev, char *buf)
329 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
331 return sprintf(buf, "%d\n", ud->ignore_driver);
333 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
336 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
338 struct node_entry *ne;
339 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
341 ne = find_entry_by_guid(guid);
343 if (ne == NULL || !ne->in_limbo)
346 nodemgr_remove_ne(ne);
350 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
352 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
354 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
356 static int nodemgr_rescan_bus_thread(void *__unused)
358 /* No userlevel access needed */
359 daemonize("kfwrescan");
361 bus_rescan_devices(&ieee1394_bus_type);
366 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
368 int state = simple_strtoul(buf, NULL, 10);
370 /* Don't wait for this, or care about errors. Root could do
371 * something stupid and spawn this a lot of times, but that's
374 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
378 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
380 return sprintf(buf, "You can force a rescan of the bus for "
381 "drivers by writing a 1 to this file\n");
383 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
386 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
388 int state = simple_strtoul(buf, NULL, 10);
397 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
399 return sprintf(buf, "%d\n", ignore_drivers);
401 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
404 struct bus_attribute *const fw_bus_attrs[] = {
405 &bus_attr_destroy_node,
407 &bus_attr_ignore_drivers,
412 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
413 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
415 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
416 fw_attr_td(ne, struct node_entry, vendor_name_kv)
417 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
419 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
420 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
421 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
422 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
424 static struct device_attribute *const fw_ne_attrs[] = {
426 &dev_attr_ne_guid_vendor_id,
427 &dev_attr_ne_capabilities,
428 &dev_attr_ne_vendor_id,
430 &dev_attr_bus_options,
431 &dev_attr_tlabels_free,
432 &dev_attr_tlabels_allocations,
433 &dev_attr_tlabels_mask,
438 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
439 fw_attr(ud, struct unit_directory, length, int, "%d\n")
440 /* These are all dependent on the value being provided */
441 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
442 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
443 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
444 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
445 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
446 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
447 fw_attr_td(ud, struct unit_directory, model_name_kv)
449 static struct device_attribute *const fw_ud_attrs[] = {
450 &dev_attr_ud_address,
452 &dev_attr_ignore_driver,
456 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
457 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
458 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
459 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
460 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
461 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
462 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
463 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
465 static struct device_attribute *const fw_host_attrs[] = {
466 &dev_attr_host_node_count,
467 &dev_attr_host_selfid_count,
468 &dev_attr_host_nodes_active,
469 &dev_attr_host_in_bus_reset,
470 &dev_attr_host_is_root,
471 &dev_attr_host_is_cycmst,
472 &dev_attr_host_is_irm,
473 &dev_attr_host_is_busmgr,
477 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
479 struct hpsb_protocol_driver *driver;
480 struct ieee1394_device_id *id;
484 driver = container_of(drv, struct hpsb_protocol_driver, driver);
486 for (id = driver->id_table; id->match_flags != 0; id++) {
489 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
490 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
491 scratch = buf + length;
495 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
496 length += sprintf(scratch, "%smodel_id=0x%06x",
497 need_coma++ ? "," : "",
499 scratch = buf + length;
502 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
503 length += sprintf(scratch, "%sspecifier_id=0x%06x",
504 need_coma++ ? "," : "",
506 scratch = buf + length;
509 if (id->match_flags & IEEE1394_MATCH_VERSION) {
510 length += sprintf(scratch, "%sversion=0x%06x",
511 need_coma++ ? "," : "",
513 scratch = buf + length;
524 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
527 fw_drv_attr(name, const char *, "%s\n")
529 static struct driver_attribute *const fw_drv_attrs[] = {
530 &driver_attr_drv_name,
531 &driver_attr_device_ids,
535 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
537 struct device_driver *drv = &driver->driver;
540 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
541 driver_create_file(drv, fw_drv_attrs[i]);
545 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
547 struct device_driver *drv = &driver->driver;
550 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
551 driver_remove_file(drv, fw_drv_attrs[i]);
555 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
557 struct device *dev = &ne->device;
560 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
561 device_create_file(dev, fw_ne_attrs[i]);
565 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
567 struct device *dev = &host->device;
570 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
571 device_create_file(dev, fw_host_attrs[i]);
575 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
577 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
579 struct device *dev = &host->device;
580 struct node_entry *ne;
582 sysfs_remove_link(&dev->kobj, "irm_id");
583 sysfs_remove_link(&dev->kobj, "busmgr_id");
584 sysfs_remove_link(&dev->kobj, "host_id");
586 if ((ne = find_entry_by_nodeid(host, host->irm_id)))
587 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id");
588 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
589 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
590 if ((ne = find_entry_by_nodeid(host, host->node_id)))
591 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
594 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
596 struct device *dev = &ud->device;
599 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
600 device_create_file(dev, fw_ud_attrs[i]);
602 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
603 device_create_file(dev, &dev_attr_ud_specifier_id);
605 if (ud->flags & UNIT_DIRECTORY_VERSION)
606 device_create_file(dev, &dev_attr_ud_version);
608 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
609 device_create_file(dev, &dev_attr_ud_vendor_id);
610 if (ud->vendor_name_kv)
611 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
614 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
615 device_create_file(dev, &dev_attr_ud_model_id);
616 if (ud->model_name_kv)
617 device_create_file(dev, &dev_attr_ud_model_name_kv);
622 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
624 struct hpsb_protocol_driver *driver;
625 struct unit_directory *ud;
626 struct ieee1394_device_id *id;
628 /* We only match unit directories */
629 if (dev->platform_data != &nodemgr_ud_platform_data)
632 ud = container_of(dev, struct unit_directory, device);
633 driver = container_of(drv, struct hpsb_protocol_driver, driver);
635 if (ud->ne->in_limbo || ud->ignore_driver)
638 for (id = driver->id_table; id->match_flags != 0; id++) {
639 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
640 id->vendor_id != ud->vendor_id)
643 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
644 id->model_id != ud->model_id)
647 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
648 id->specifier_id != ud->specifier_id)
651 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
652 id->version != ud->version)
662 static void nodemgr_remove_uds(struct node_entry *ne)
664 struct class_device *cdev, *next;
665 struct unit_directory *ud;
667 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
668 ud = container_of(cdev, struct unit_directory, class_dev);
673 class_device_unregister(&ud->class_dev);
674 device_unregister(&ud->device);
679 static void nodemgr_remove_ne(struct node_entry *ne)
681 struct device *dev = &ne->device;
683 dev = get_device(&ne->device);
687 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
688 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
690 nodemgr_remove_uds(ne);
692 class_device_unregister(&ne->class_dev);
693 device_unregister(dev);
699 static void nodemgr_remove_host_dev(struct device *dev)
701 struct device *ne_dev, *next;
703 list_for_each_entry_safe(ne_dev, next, &dev->children, node)
704 nodemgr_remove_ne(container_of(ne_dev, struct node_entry, device));
706 sysfs_remove_link(&dev->kobj, "irm_id");
707 sysfs_remove_link(&dev->kobj, "busmgr_id");
708 sysfs_remove_link(&dev->kobj, "host_id");
712 static void nodemgr_update_bus_options(struct node_entry *ne)
714 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
715 static const u16 mr[] = { 4, 64, 1024, 0};
717 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
719 ne->busopt.irmc = (busoptions >> 31) & 1;
720 ne->busopt.cmc = (busoptions >> 30) & 1;
721 ne->busopt.isc = (busoptions >> 29) & 1;
722 ne->busopt.bmc = (busoptions >> 28) & 1;
723 ne->busopt.pmc = (busoptions >> 27) & 1;
724 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
725 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
726 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
727 ne->busopt.generation = (busoptions >> 4) & 0xf;
728 ne->busopt.lnkspd = busoptions & 0x7;
730 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
731 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
732 busoptions, ne->busopt.irmc, ne->busopt.cmc,
733 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
734 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
735 mr[ne->busopt.max_rom],
736 ne->busopt.generation, ne->busopt.lnkspd);
740 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
741 struct host_info *hi, nodeid_t nodeid,
742 unsigned int generation)
744 struct hpsb_host *host = hi->host;
745 struct node_entry *ne;
747 ne = kmalloc(sizeof(struct node_entry), GFP_KERNEL);
748 if (!ne) return NULL;
750 memset(ne, 0, sizeof(struct node_entry));
752 ne->tpool = &host->tpool[nodeid & NODE_MASK];
756 ne->generation = generation;
760 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
761 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
764 memcpy(&ne->device, &nodemgr_dev_template_ne,
766 ne->device.parent = &host->device;
767 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
768 (unsigned long long)(ne->guid));
770 ne->class_dev.dev = &ne->device;
771 ne->class_dev.class = &nodemgr_ne_class;
772 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
773 (unsigned long long)(ne->guid));
775 device_register(&ne->device);
776 class_device_register(&ne->class_dev);
777 get_device(&ne->device);
779 if (ne->guid_vendor_oui)
780 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
781 nodemgr_create_ne_dev_files(ne);
783 nodemgr_update_bus_options(ne);
785 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
786 (host->node_id == nodeid) ? "Host" : "Node",
787 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
793 static struct node_entry *find_entry_by_guid(u64 guid)
795 struct class *class = &nodemgr_ne_class;
796 struct class_device *cdev;
797 struct node_entry *ne, *ret_ne = NULL;
799 down_read(&class->subsys.rwsem);
800 list_for_each_entry(cdev, &class->children, node) {
801 ne = container_of(cdev, struct node_entry, class_dev);
803 if (ne->guid == guid) {
808 up_read(&class->subsys.rwsem);
814 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
816 struct class *class = &nodemgr_ne_class;
817 struct class_device *cdev;
818 struct node_entry *ne, *ret_ne = NULL;
820 down_read(&class->subsys.rwsem);
821 list_for_each_entry(cdev, &class->children, node) {
822 ne = container_of(cdev, struct node_entry, class_dev);
824 if (ne->host == host && ne->nodeid == nodeid) {
829 up_read(&class->subsys.rwsem);
836 /* This implementation currently only scans the config rom and its
837 * immediate unit directories looking for software_id and
838 * software_version entries, in order to get driver autoloading working. */
839 static struct unit_directory *nodemgr_process_unit_directory
840 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
841 unsigned int *id, struct unit_directory *parent)
843 struct unit_directory *ud;
844 struct unit_directory *ud_temp = NULL;
845 struct csr1212_dentry *dentry;
846 struct csr1212_keyval *kv;
849 ud = kmalloc(sizeof(struct unit_directory), GFP_KERNEL);
851 goto unit_directory_error;
853 memset (ud, 0, sizeof(struct unit_directory));
856 ud->ignore_driver = ignore_drivers;
857 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
861 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
862 switch (kv->key.id) {
863 case CSR1212_KV_ID_VENDOR:
864 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
865 ud->vendor_id = kv->value.immediate;
866 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
869 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
873 case CSR1212_KV_ID_MODEL:
874 ud->model_id = kv->value.immediate;
875 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
878 case CSR1212_KV_ID_SPECIFIER_ID:
879 ud->specifier_id = kv->value.immediate;
880 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
883 case CSR1212_KV_ID_VERSION:
884 ud->version = kv->value.immediate;
885 ud->flags |= UNIT_DIRECTORY_VERSION;
888 case CSR1212_KV_ID_DESCRIPTOR:
889 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
890 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
891 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
892 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
893 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
894 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
895 switch (last_key_id) {
896 case CSR1212_KV_ID_VENDOR:
897 ud->vendor_name_kv = kv;
898 csr1212_keep_keyval(kv);
901 case CSR1212_KV_ID_MODEL:
902 ud->model_name_kv = kv;
903 csr1212_keep_keyval(kv);
907 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
910 case CSR1212_KV_ID_DEPENDENT_INFO:
911 if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
912 /* This should really be done in SBP2 as this is
913 * doing SBP2 specific parsing. */
914 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
915 ud_temp = nodemgr_process_unit_directory(hi, ne, kv, id,
921 /* inherit unspecified values */
922 if ((ud->flags & UNIT_DIRECTORY_VENDOR_ID) &&
923 !(ud_temp->flags & UNIT_DIRECTORY_VENDOR_ID))
925 ud_temp->flags |= UNIT_DIRECTORY_VENDOR_ID;
926 ud_temp->vendor_id = ud->vendor_id;
927 ud_temp->vendor_oui = ud->vendor_oui;
929 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
930 !(ud_temp->flags & UNIT_DIRECTORY_MODEL_ID))
932 ud_temp->flags |= UNIT_DIRECTORY_MODEL_ID;
933 ud_temp->model_id = ud->model_id;
935 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
936 !(ud_temp->flags & UNIT_DIRECTORY_SPECIFIER_ID))
938 ud_temp->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
939 ud_temp->specifier_id = ud->specifier_id;
941 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
942 !(ud_temp->flags & UNIT_DIRECTORY_VERSION))
944 ud_temp->flags |= UNIT_DIRECTORY_VERSION;
945 ud_temp->version = ud->version;
954 last_key_id = kv->key.id;
957 memcpy(&ud->device, &nodemgr_dev_template_ud,
961 ud->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
962 ud->device.parent = &parent->device;
964 ud->device.parent = &ne->device;
966 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
967 ne->device.bus_id, ud->id);
969 ud->class_dev.dev = &ud->device;
970 ud->class_dev.class = &nodemgr_ud_class;
971 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
972 ne->device.bus_id, ud->id);
974 device_register(&ud->device);
975 class_device_register(&ud->class_dev);
976 get_device(&ud->device);
979 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
980 nodemgr_create_ud_dev_files(ud);
984 unit_directory_error:
991 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
993 unsigned int ud_id = 0;
994 struct csr1212_dentry *dentry;
995 struct csr1212_keyval *kv;
1000 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1001 switch (kv->key.id) {
1002 case CSR1212_KV_ID_VENDOR:
1003 ne->vendor_id = kv->value.immediate;
1006 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1009 case CSR1212_KV_ID_NODE_CAPABILITIES:
1010 ne->capabilities = kv->value.immediate;
1013 case CSR1212_KV_ID_UNIT:
1014 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1017 case CSR1212_KV_ID_DESCRIPTOR:
1018 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1019 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1020 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1021 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1022 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1023 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1024 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1025 ne->vendor_name_kv = kv;
1026 csr1212_keep_keyval(kv);
1031 last_key_id = kv->key.id;
1035 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1036 if (ne->vendor_name_kv)
1037 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1040 #ifdef CONFIG_HOTPLUG
1042 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
1043 char *buffer, int buffer_size)
1045 struct unit_directory *ud;
1052 ud = container_of(cdev, struct unit_directory, class_dev);
1054 if (ud->ne->in_limbo || ud->ignore_driver)
1057 #define PUT_ENVP(fmt,val) \
1060 envp[i++] = buffer; \
1061 printed = snprintf(buffer, buffer_size - length, \
1063 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1065 length += printed+1; \
1066 buffer += printed+1; \
1069 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1070 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1071 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1072 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1073 PUT_ENVP("VERSION=%06x", ud->version);
1084 static int nodemgr_hotplug(struct class_device *cdev, char **envp, int num_envp,
1085 char *buffer, int buffer_size)
1090 #endif /* CONFIG_HOTPLUG */
1093 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1097 /* This will cause a probe for devices */
1098 ret = driver_register(&driver->driver);
1100 nodemgr_create_drv_files(driver);
1105 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1107 nodemgr_remove_drv_files(driver);
1108 /* This will subsequently disconnect all devices that our driver
1109 * is attached to. */
1110 driver_unregister(&driver->driver);
1115 * This function updates nodes that were present on the bus before the
1116 * reset and still are after the reset. The nodeid and the config rom
1117 * may have changed, and the drivers managing this device must be
1118 * informed that this device just went through a bus reset, to allow
1119 * the to take whatever actions required.
1121 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1122 struct host_info *hi, nodeid_t nodeid,
1123 unsigned int generation)
1125 if (ne->nodeid != nodeid) {
1126 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1127 NODE_BUS_ARGS(ne->host, ne->nodeid),
1128 NODE_BUS_ARGS(ne->host, nodeid));
1129 ne->nodeid = nodeid;
1132 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1133 kfree(ne->csr->private);
1134 csr1212_destroy_csr(ne->csr);
1137 /* If the node's configrom generation has changed, we
1138 * unregister all the unit directories. */
1139 nodemgr_remove_uds(ne);
1141 nodemgr_update_bus_options(ne);
1143 /* Mark the node as new, so it gets re-probed */
1144 ne->needs_probe = 1;
1148 nodemgr_resume_ne(ne);
1150 /* Mark the node current */
1151 ne->generation = generation;
1156 static void nodemgr_node_scan_one(struct host_info *hi,
1157 nodeid_t nodeid, int generation)
1159 struct hpsb_host *host = hi->host;
1160 struct node_entry *ne;
1162 struct csr1212_csr *csr;
1163 struct nodemgr_csr_info *ci;
1165 ci = kmalloc(sizeof(struct nodemgr_csr_info), GFP_KERNEL);
1170 ci->nodeid = nodeid;
1171 ci->generation = generation;
1173 /* We need to detect when the ConfigROM's generation has changed,
1174 * so we only update the node's info when it needs to be. */
1176 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1177 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1178 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1179 NODE_BUS_ARGS(host, nodeid));
1181 csr1212_destroy_csr(csr);
1186 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1187 /* This isn't a 1394 device, but we let it slide. There
1188 * was a report of a device with broken firmware which
1189 * reported '2394' instead of '1394', which is obviously a
1190 * mistake. One would hope that a non-1394 device never
1191 * gets connected to Firewire bus. If someone does, we
1192 * shouldn't be held responsible, so we'll allow it with a
1194 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1195 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1198 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1199 ne = find_entry_by_guid(guid);
1201 if (ne && ne->host != host && ne->in_limbo) {
1202 /* Must have moved this device from one host to another */
1203 nodemgr_remove_ne(ne);
1208 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1210 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1216 static void nodemgr_node_scan(struct host_info *hi, int generation)
1219 struct hpsb_host *host = hi->host;
1220 struct selfid *sid = (struct selfid *)host->topology_map;
1221 nodeid_t nodeid = LOCAL_BUS;
1223 /* Scan each node on the bus */
1224 for (count = host->selfid_count; count; count--, sid++) {
1228 if (!sid->link_active) {
1232 nodemgr_node_scan_one(hi, nodeid++, generation);
1237 static void nodemgr_suspend_ne(struct node_entry *ne)
1239 struct class_device *cdev;
1240 struct unit_directory *ud;
1242 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1243 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1246 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1248 down_write(&ne->device.bus->subsys.rwsem);
1249 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1250 ud = container_of(cdev, struct unit_directory, class_dev);
1255 if (ud->device.driver &&
1256 (!ud->device.driver->suspend ||
1257 ud->device.driver->suspend(&ud->device, 0, 0)))
1258 device_release_driver(&ud->device);
1260 up_write(&ne->device.bus->subsys.rwsem);
1264 static void nodemgr_resume_ne(struct node_entry *ne)
1266 struct class_device *cdev;
1267 struct unit_directory *ud;
1270 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1272 down_read(&ne->device.bus->subsys.rwsem);
1273 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1274 ud = container_of(cdev, struct unit_directory, class_dev);
1279 if (ud->device.driver && ud->device.driver->resume)
1280 ud->device.driver->resume(&ud->device, 0);
1282 up_read(&ne->device.bus->subsys.rwsem);
1284 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1285 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1289 static void nodemgr_update_pdrv(struct node_entry *ne)
1291 struct unit_directory *ud;
1292 struct hpsb_protocol_driver *pdrv;
1293 struct class *class = &nodemgr_ud_class;
1294 struct class_device *cdev;
1296 down_read(&class->subsys.rwsem);
1297 list_for_each_entry(cdev, &class->children, node) {
1298 ud = container_of(cdev, struct unit_directory, class_dev);
1299 if (ud->ne != ne || !ud->device.driver)
1302 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1304 if (pdrv->update && pdrv->update(ud)) {
1305 down_write(&ud->device.bus->subsys.rwsem);
1306 device_release_driver(&ud->device);
1307 up_write(&ud->device.bus->subsys.rwsem);
1310 up_read(&class->subsys.rwsem);
1314 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1318 if (ne->host != hi->host || ne->in_limbo)
1321 dev = get_device(&ne->device);
1325 /* If "needs_probe", then this is either a new or changed node we
1326 * rescan totally. If the generation matches for an existing node
1327 * (one that existed prior to the bus reset) we send update calls
1328 * down to the drivers. Otherwise, this is a dead node and we
1330 if (ne->needs_probe)
1331 nodemgr_process_root_directory(hi, ne);
1332 else if (ne->generation == generation)
1333 nodemgr_update_pdrv(ne);
1335 nodemgr_suspend_ne(ne);
1341 static void nodemgr_node_probe(struct host_info *hi, int generation)
1343 struct hpsb_host *host = hi->host;
1344 struct class *class = &nodemgr_ne_class;
1345 struct class_device *cdev;
1347 /* Do some processing of the nodes we've probed. This pulls them
1348 * into the sysfs layer if needed, and can result in processing of
1349 * unit-directories, or just updating the node and it's
1350 * unit-directories. */
1351 down_read(&class->subsys.rwsem);
1352 list_for_each_entry(cdev, &class->children, node)
1353 nodemgr_probe_ne(hi, container_of(cdev, struct node_entry, class_dev), generation);
1354 up_read(&class->subsys.rwsem);
1357 /* If we had a bus reset while we were scanning the bus, it is
1358 * possible that we did not probe all nodes. In that case, we
1359 * skip the clean up for now, since we could remove nodes that
1360 * were still on the bus. The bus reset increased hi->reset_sem,
1361 * so there's a bus scan pending which will do the clean up
1364 * Now let's tell the bus to rescan our devices. This may seem
1365 * like overhead, but the driver-model core will only scan a
1366 * device for a driver when either the device is added, or when a
1367 * new driver is added. A bus reset is a good reason to rescan
1368 * devices that were there before. For example, an sbp2 device
1369 * may become available for login, if the host that held it was
1372 if (generation == get_hpsb_generation(host))
1373 bus_rescan_devices(&ieee1394_bus_type);
1378 /* Because we are a 1394a-2000 compliant IRM, we need to inform all the other
1379 * nodes of the broadcast channel. (Really we're only setting the validity
1380 * bit). Other IRM responsibilities go in here as well. */
1381 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1385 /* if irm_id == -1 then there is no IRM on this bus */
1386 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1389 host->csr.broadcast_channel |= 0x40000000; /* set validity bit */
1391 bc = cpu_to_be32(host->csr.broadcast_channel);
1393 hpsb_write(host, LOCAL_BUS | ALL_NODES, get_hpsb_generation(host),
1394 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1395 &bc, sizeof(quadlet_t));
1397 /* If there is no bus manager then we should set the root node's
1398 * force_root bit to promote bus stability per the 1394
1399 * spec. (8.4.2.6) */
1400 if (host->busmgr_id == 0xffff && host->node_count > 1)
1402 u16 root_node = host->node_count - 1;
1403 struct node_entry *ne = find_entry_by_nodeid(host, root_node | LOCAL_BUS);
1405 if (ne && ne->busopt.cmc)
1406 hpsb_send_phy_config(host, root_node, -1);
1408 HPSB_DEBUG("The root node is not cycle master capable; "
1409 "selecting a new root node and resetting...");
1412 /* Oh screw it! Just leave the bus as it is */
1413 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1417 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1418 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1427 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1428 * everything we can do, otherwise issue a bus reset and try to become the IRM
1430 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1438 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1439 get_hpsb_generation(host),
1440 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1441 &bc, sizeof(quadlet_t));
1443 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1444 /* The current irm node does not have a valid BROADCAST_CHANNEL
1445 * register and we do, so reset the bus with force_root set */
1446 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1449 /* Oh screw it! Just leave the bus as it is */
1450 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1454 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1455 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1463 static int nodemgr_host_thread(void *__hi)
1465 struct host_info *hi = (struct host_info *)__hi;
1466 struct hpsb_host *host = hi->host;
1467 int reset_cycles = 0;
1469 /* No userlevel access needed */
1470 daemonize(hi->daemon_name);
1472 /* Setup our device-model entries */
1473 nodemgr_create_host_dev_files(host);
1475 /* Sit and wait for a signal to probe the nodes on the bus. This
1476 * happens when we get a bus reset. */
1478 unsigned int generation = 0;
1481 if (down_interruptible(&hi->reset_sem) ||
1482 down_interruptible(&nodemgr_serialize)) {
1483 if (current->flags & PF_FREEZE) {
1487 printk("NodeMgr: received unexpected signal?!\n" );
1492 up(&nodemgr_serialize);
1496 /* Pause for 1/4 second in 1/16 second intervals,
1497 * to make sure things settle down. */
1498 for (i = 0; i < 4 ; i++) {
1499 set_current_state(TASK_INTERRUPTIBLE);
1500 if (msleep_interruptible(63)) {
1501 up(&nodemgr_serialize);
1505 /* Now get the generation in which the node ID's we collect
1506 * are valid. During the bus scan we will use this generation
1507 * for the read transactions, so that if another reset occurs
1508 * during the scan the transactions will fail instead of
1509 * returning bogus data. */
1510 generation = get_hpsb_generation(host);
1512 /* If we get a reset before we are done waiting, then
1513 * start the the waiting over again */
1514 while (!down_trylock(&hi->reset_sem))
1517 /* Check the kill_me again */
1519 up(&nodemgr_serialize);
1524 if (!nodemgr_check_irm_capability(host, reset_cycles)) {
1526 up(&nodemgr_serialize);
1530 /* Scan our nodes to get the bus options and create node
1531 * entries. This does not do the sysfs stuff, since that
1532 * would trigger hotplug callbacks and such, which is a
1533 * bad idea at this point. */
1534 nodemgr_node_scan(hi, generation);
1535 if (!nodemgr_do_irm_duties(host, reset_cycles)) {
1537 up(&nodemgr_serialize);
1543 /* This actually does the full probe, with sysfs
1545 nodemgr_node_probe(hi, generation);
1547 /* Update some of our sysfs symlinks */
1548 nodemgr_update_host_dev_links(host);
1550 up(&nodemgr_serialize);
1554 HPSB_VERBOSE("NodeMgr: Exiting thread");
1556 complete_and_exit(&hi->exited, 0);
1559 struct node_entry *hpsb_guid_get_entry(u64 guid)
1561 struct node_entry *ne;
1563 down(&nodemgr_serialize);
1564 ne = find_entry_by_guid(guid);
1565 up(&nodemgr_serialize);
1570 struct node_entry *hpsb_nodeid_get_entry(struct hpsb_host *host, nodeid_t nodeid)
1572 struct node_entry *ne;
1574 down(&nodemgr_serialize);
1575 ne = find_entry_by_nodeid(host, nodeid);
1576 up(&nodemgr_serialize);
1582 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1584 struct class *class = &hpsb_host_class;
1585 struct class_device *cdev;
1586 struct hpsb_host *host;
1589 down_read(&class->subsys.rwsem);
1590 list_for_each_entry(cdev, &class->children, node) {
1591 host = container_of(cdev, struct hpsb_host, class_dev);
1593 if ((error = cb(host, __data)))
1596 up_read(&class->subsys.rwsem);
1601 /* The following four convenience functions use a struct node_entry
1602 * for addressing a node on the bus. They are intended for use by any
1603 * process context, not just the nodemgr thread, so we need to be a
1604 * little careful when reading out the node ID and generation. The
1605 * thing that can go wrong is that we get the node ID, then a bus
1606 * reset occurs, and then we read the generation. The node ID is
1607 * possibly invalid, but the generation is current, and we end up
1608 * sending a packet to a the wrong node.
1610 * The solution is to make sure we read the generation first, so that
1611 * if a reset occurs in the process, we end up with a stale generation
1612 * and the transactions will fail instead of silently using wrong node
1616 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1618 pkt->host = ne->host;
1619 pkt->generation = ne->generation;
1621 pkt->node_id = ne->nodeid;
1624 int hpsb_node_read(struct node_entry *ne, u64 addr,
1625 quadlet_t *buffer, size_t length)
1627 unsigned int generation = ne->generation;
1630 return hpsb_read(ne->host, ne->nodeid, generation,
1631 addr, buffer, length);
1634 int hpsb_node_write(struct node_entry *ne, u64 addr,
1635 quadlet_t *buffer, size_t length)
1637 unsigned int generation = ne->generation;
1640 return hpsb_write(ne->host, ne->nodeid, generation,
1641 addr, buffer, length);
1644 int hpsb_node_lock(struct node_entry *ne, u64 addr,
1645 int extcode, quadlet_t *data, quadlet_t arg)
1647 unsigned int generation = ne->generation;
1650 return hpsb_lock(ne->host, ne->nodeid, generation,
1651 addr, extcode, data, arg);
1654 static void nodemgr_add_host(struct hpsb_host *host)
1656 struct host_info *hi;
1658 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1661 HPSB_ERR ("NodeMgr: out of memory in add host");
1666 init_completion(&hi->exited);
1667 sema_init(&hi->reset_sem, 0);
1669 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1671 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1674 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1675 hi->daemon_name, host->driver->name);
1676 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1683 static void nodemgr_host_reset(struct hpsb_host *host)
1685 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1688 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1691 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1696 static void nodemgr_remove_host(struct hpsb_host *host)
1698 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1705 wait_for_completion(&hi->exited);
1706 nodemgr_remove_host_dev(&host->device);
1709 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1710 host->driver->name);
1715 static struct hpsb_highlevel nodemgr_highlevel = {
1716 .name = "Node manager",
1717 .add_host = nodemgr_add_host,
1718 .host_reset = nodemgr_host_reset,
1719 .remove_host = nodemgr_remove_host,
1722 int init_ieee1394_nodemgr(void)
1726 ret = class_register(&nodemgr_ne_class);
1730 ret = class_register(&nodemgr_ud_class);
1732 class_unregister(&nodemgr_ne_class);
1736 hpsb_register_highlevel(&nodemgr_highlevel);
1741 void cleanup_ieee1394_nodemgr(void)
1743 hpsb_unregister_highlevel(&nodemgr_highlevel);
1745 class_unregister(&nodemgr_ud_class);
1746 class_unregister(&nodemgr_ne_class);