2 * Node information (ConfigROM) collection and management.
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
11 #include <linux/bitmap.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/delay.h>
16 #include <linux/kthread.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/freezer.h>
20 #include <asm/atomic.h>
23 #include "highlevel.h"
26 #include "ieee1394_core.h"
27 #include "ieee1394_hotplug.h"
28 #include "ieee1394_types.h"
29 #include "ieee1394_transactions.h"
32 static int ignore_drivers;
33 module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
36 struct nodemgr_csr_info {
37 struct hpsb_host *host;
39 unsigned int generation;
40 unsigned int speed_unverified:1;
45 * Correct the speed map entry. This is necessary
46 * - for nodes with link speed < phy speed,
47 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
48 * A possible speed is determined by trial and error, using quadlet reads.
50 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
54 u8 i, *speed, old_speed, good_speed;
57 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
59 good_speed = IEEE1394_SPEED_MAX + 1;
61 /* Try every speed from S100 to old_speed.
62 * If we did it the other way around, a too low speed could be caught
63 * if the retry succeeded for some other reason, e.g. because the link
64 * just finished its initialization. */
65 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
67 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
68 &q, sizeof(quadlet_t));
74 if (good_speed <= IEEE1394_SPEED_MAX) {
75 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
76 NODE_BUS_ARGS(ci->host, ci->nodeid),
77 hpsb_speedto_str[good_speed]);
79 ci->speed_unverified = 0;
86 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
87 void *buffer, void *__ci)
89 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
93 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
96 ci->speed_unverified = 0;
99 /* Give up after 3rd failure. */
103 /* The ieee1394_core guessed the node's speed capability from
104 * the self ID. Check whether a lower speed works. */
105 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
106 error = nodemgr_check_speed(ci, addr, buffer);
110 if (msleep_interruptible(334))
116 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
118 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
121 static struct csr1212_bus_ops nodemgr_csr_ops = {
122 .bus_read = nodemgr_bus_read,
123 .get_max_rom = nodemgr_get_max_rom
128 * Basically what we do here is start off retrieving the bus_info block.
129 * From there will fill in some info about the node, verify it is of IEEE
130 * 1394 type, and that the crc checks out ok. After that we start off with
131 * the root directory, and subdirectories. To do this, we retrieve the
132 * quadlet header for a directory, find out the length, and retrieve the
133 * complete directory entry (be it a leaf or a directory). We then process
134 * it and add the info to our structure for that particular node.
136 * We verify CRC's along the way for each directory/block/leaf. The entire
137 * node structure is generic, and simply stores the information in a way
138 * that's easy to parse by the protocol interface.
142 * The nodemgr relies heavily on the Driver Model for device callbacks and
143 * driver/device mappings. The old nodemgr used to handle all this itself,
144 * but now we are much simpler because of the LDM.
147 static DEFINE_MUTEX(nodemgr_serialize);
150 struct hpsb_host *host;
151 struct list_head list;
152 struct task_struct *thread;
155 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
156 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
157 char *buffer, int buffer_size);
158 static void nodemgr_resume_ne(struct node_entry *ne);
159 static void nodemgr_remove_ne(struct node_entry *ne);
160 static struct node_entry *find_entry_by_guid(u64 guid);
162 struct bus_type ieee1394_bus_type = {
164 .match = nodemgr_bus_match,
167 static void host_cls_release(struct class_device *class_dev)
169 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
172 struct class hpsb_host_class = {
173 .name = "ieee1394_host",
174 .release = host_cls_release,
177 static void ne_cls_release(struct class_device *class_dev)
179 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
182 static struct class nodemgr_ne_class = {
183 .name = "ieee1394_node",
184 .release = ne_cls_release,
187 static void ud_cls_release(struct class_device *class_dev)
189 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
192 /* The name here is only so that unit directory hotplug works with old
193 * style hotplug, which only ever did unit directories anyway. */
194 static struct class nodemgr_ud_class = {
196 .release = ud_cls_release,
197 .uevent = nodemgr_uevent,
200 static struct hpsb_highlevel nodemgr_highlevel;
203 static void nodemgr_release_ud(struct device *dev)
205 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
207 if (ud->vendor_name_kv)
208 csr1212_release_keyval(ud->vendor_name_kv);
209 if (ud->model_name_kv)
210 csr1212_release_keyval(ud->model_name_kv);
215 static void nodemgr_release_ne(struct device *dev)
217 struct node_entry *ne = container_of(dev, struct node_entry, device);
219 if (ne->vendor_name_kv)
220 csr1212_release_keyval(ne->vendor_name_kv);
226 static void nodemgr_release_host(struct device *dev)
228 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
230 csr1212_destroy_csr(host->csr.rom);
235 static int nodemgr_ud_platform_data;
237 static struct device nodemgr_dev_template_ud = {
238 .bus = &ieee1394_bus_type,
239 .release = nodemgr_release_ud,
240 .platform_data = &nodemgr_ud_platform_data,
243 static struct device nodemgr_dev_template_ne = {
244 .bus = &ieee1394_bus_type,
245 .release = nodemgr_release_ne,
248 /* This dummy driver prevents the host devices from being scanned. We have no
249 * useful drivers for them yet, and there would be a deadlock possible if the
250 * driver core scans the host device while the host's low-level driver (i.e.
251 * the host's parent device) is being removed. */
252 static struct device_driver nodemgr_mid_layer_driver = {
253 .bus = &ieee1394_bus_type,
255 .owner = THIS_MODULE,
258 struct device nodemgr_dev_template_host = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_host,
261 .driver = &nodemgr_mid_layer_driver,
265 #define fw_attr(class, class_type, field, type, format_string) \
266 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
269 class = container_of(dev, class_type, device); \
270 return sprintf(buf, format_string, (type)class->field); \
272 static struct device_attribute dev_attr_##class##_##field = { \
273 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
274 .show = fw_show_##class##_##field, \
277 #define fw_attr_td(class, class_type, td_kv) \
278 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
281 class_type *class = container_of(dev, class_type, device); \
282 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
284 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
286 while ((buf + len - 1) == '\0') \
292 static struct device_attribute dev_attr_##class##_##td_kv = { \
293 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
294 .show = fw_show_##class##_##td_kv, \
298 #define fw_drv_attr(field, type, format_string) \
299 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
301 struct hpsb_protocol_driver *driver; \
302 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
303 return sprintf(buf, format_string, (type)driver->field);\
305 static struct driver_attribute driver_attr_drv_##field = { \
306 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
307 .show = fw_drv_show_##field, \
311 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
313 struct node_entry *ne = container_of(dev, struct node_entry, device);
315 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
316 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
318 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
319 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
322 ne->busopt.cyc_clk_acc);
324 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
327 #ifdef HPSB_DEBUG_TLABELS
328 static ssize_t fw_show_ne_tlabels_free(struct device *dev,
329 struct device_attribute *attr, char *buf)
331 struct node_entry *ne = container_of(dev, struct node_entry, device);
333 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
336 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
337 tf = 64 - bitmap_weight(tp, 64);
338 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
340 return sprintf(buf, "%d\n", tf);
342 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
345 static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
346 struct device_attribute *attr, char *buf)
348 struct node_entry *ne = container_of(dev, struct node_entry, device);
350 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
353 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
354 #if (BITS_PER_LONG <= 32)
355 tm = ((u64)tp[0] << 32) + tp[1];
359 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
361 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
363 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
364 #endif /* HPSB_DEBUG_TLABELS */
367 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
369 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
370 int state = simple_strtoul(buf, NULL, 10);
373 ud->ignore_driver = 1;
374 down_write(&ieee1394_bus_type.subsys.rwsem);
375 device_release_driver(dev);
376 up_write(&ieee1394_bus_type.subsys.rwsem);
377 } else if (state == 0)
378 ud->ignore_driver = 0;
382 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
384 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
386 return sprintf(buf, "%d\n", ud->ignore_driver);
388 static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
391 static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
393 struct node_entry *ne;
394 u64 guid = (u64)simple_strtoull(buf, NULL, 16);
396 ne = find_entry_by_guid(guid);
398 if (ne == NULL || !ne->in_limbo)
401 nodemgr_remove_ne(ne);
405 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
407 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
409 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
412 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
417 if (simple_strtoul(buf, NULL, 10) == 1)
418 error = bus_rescan_devices(&ieee1394_bus_type);
419 return error ? error : count;
421 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
423 return sprintf(buf, "You can force a rescan of the bus for "
424 "drivers by writing a 1 to this file\n");
426 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
429 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
431 int state = simple_strtoul(buf, NULL, 10);
440 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
442 return sprintf(buf, "%d\n", ignore_drivers);
444 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
447 struct bus_attribute *const fw_bus_attrs[] = {
448 &bus_attr_destroy_node,
450 &bus_attr_ignore_drivers,
455 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
456 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
458 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
459 fw_attr_td(ne, struct node_entry, vendor_name_kv)
461 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
462 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
463 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
465 static struct device_attribute *const fw_ne_attrs[] = {
467 &dev_attr_ne_guid_vendor_id,
468 &dev_attr_ne_capabilities,
469 &dev_attr_ne_vendor_id,
471 &dev_attr_bus_options,
472 #ifdef HPSB_DEBUG_TLABELS
473 &dev_attr_tlabels_free,
474 &dev_attr_tlabels_mask,
480 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
481 fw_attr(ud, struct unit_directory, length, int, "%d\n")
482 /* These are all dependent on the value being provided */
483 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
484 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
485 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
486 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
487 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
488 fw_attr_td(ud, struct unit_directory, model_name_kv)
490 static struct device_attribute *const fw_ud_attrs[] = {
491 &dev_attr_ud_address,
493 &dev_attr_ignore_driver,
497 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
498 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
499 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
500 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
501 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
502 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
503 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
504 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
506 static struct device_attribute *const fw_host_attrs[] = {
507 &dev_attr_host_node_count,
508 &dev_attr_host_selfid_count,
509 &dev_attr_host_nodes_active,
510 &dev_attr_host_in_bus_reset,
511 &dev_attr_host_is_root,
512 &dev_attr_host_is_cycmst,
513 &dev_attr_host_is_irm,
514 &dev_attr_host_is_busmgr,
518 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
520 struct hpsb_protocol_driver *driver;
521 struct ieee1394_device_id *id;
525 driver = container_of(drv, struct hpsb_protocol_driver, driver);
527 for (id = driver->id_table; id->match_flags != 0; id++) {
530 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
531 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
532 scratch = buf + length;
536 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
537 length += sprintf(scratch, "%smodel_id=0x%06x",
538 need_coma++ ? "," : "",
540 scratch = buf + length;
543 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
544 length += sprintf(scratch, "%sspecifier_id=0x%06x",
545 need_coma++ ? "," : "",
547 scratch = buf + length;
550 if (id->match_flags & IEEE1394_MATCH_VERSION) {
551 length += sprintf(scratch, "%sversion=0x%06x",
552 need_coma++ ? "," : "",
554 scratch = buf + length;
565 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
568 fw_drv_attr(name, const char *, "%s\n")
570 static struct driver_attribute *const fw_drv_attrs[] = {
571 &driver_attr_drv_name,
572 &driver_attr_device_ids,
576 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
578 struct device_driver *drv = &driver->driver;
581 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
582 if (driver_create_file(drv, fw_drv_attrs[i]))
586 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver->name);
590 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
592 struct device_driver *drv = &driver->driver;
595 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
596 driver_remove_file(drv, fw_drv_attrs[i]);
600 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
602 struct device *dev = &ne->device;
605 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
606 if (device_create_file(dev, fw_ne_attrs[i]))
610 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
611 (unsigned long long)ne->guid);
615 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
617 struct device *dev = &host->device;
620 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
621 if (device_create_file(dev, fw_host_attrs[i]))
625 HPSB_ERR("Failed to add sysfs attribute for host %d", host->id);
629 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
632 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
634 struct device *dev = &host->device;
635 struct node_entry *ne;
637 sysfs_remove_link(&dev->kobj, "irm_id");
638 sysfs_remove_link(&dev->kobj, "busmgr_id");
639 sysfs_remove_link(&dev->kobj, "host_id");
641 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
642 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"))
647 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
648 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
652 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
655 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
657 struct device *dev = &ud->device;
660 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
661 if (device_create_file(dev, fw_ud_attrs[i]))
663 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
664 if (device_create_file(dev, &dev_attr_ud_specifier_id))
666 if (ud->flags & UNIT_DIRECTORY_VERSION)
667 if (device_create_file(dev, &dev_attr_ud_version))
669 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
670 if (device_create_file(dev, &dev_attr_ud_vendor_id))
672 if (ud->vendor_name_kv &&
673 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
676 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
677 if (device_create_file(dev, &dev_attr_ud_model_id))
679 if (ud->model_name_kv &&
680 device_create_file(dev, &dev_attr_ud_model_name_kv))
685 HPSB_ERR("Failed to add sysfs attributes for unit %s",
690 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
692 struct hpsb_protocol_driver *driver;
693 struct unit_directory *ud;
694 struct ieee1394_device_id *id;
696 /* We only match unit directories */
697 if (dev->platform_data != &nodemgr_ud_platform_data)
700 ud = container_of(dev, struct unit_directory, device);
701 if (ud->ne->in_limbo || ud->ignore_driver)
704 /* We only match drivers of type hpsb_protocol_driver */
705 if (drv == &nodemgr_mid_layer_driver)
708 driver = container_of(drv, struct hpsb_protocol_driver, driver);
709 for (id = driver->id_table; id->match_flags != 0; id++) {
710 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
711 id->vendor_id != ud->vendor_id)
714 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
715 id->model_id != ud->model_id)
718 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
719 id->specifier_id != ud->specifier_id)
722 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
723 id->version != ud->version)
733 static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
735 static void nodemgr_remove_uds(struct node_entry *ne)
737 struct class_device *cdev;
738 struct unit_directory *tmp, *ud;
740 /* Iteration over nodemgr_ud_class.children has to be protected by
741 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
742 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
743 * release the semaphore, and then unregister the ud. Since this code
744 * may be called from other contexts besides the knodemgrds, protect the
745 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
747 mutex_lock(&nodemgr_serialize_remove_uds);
750 down(&nodemgr_ud_class.sem);
751 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
752 tmp = container_of(cdev, struct unit_directory,
759 up(&nodemgr_ud_class.sem);
762 class_device_unregister(&ud->class_dev);
763 device_unregister(&ud->device);
765 mutex_unlock(&nodemgr_serialize_remove_uds);
769 static void nodemgr_remove_ne(struct node_entry *ne)
773 dev = get_device(&ne->device);
777 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
778 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
780 nodemgr_remove_uds(ne);
782 class_device_unregister(&ne->class_dev);
783 device_unregister(dev);
788 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
790 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
794 static void nodemgr_remove_host_dev(struct device *dev)
796 WARN_ON(device_for_each_child(dev, NULL, __nodemgr_remove_host_dev));
797 sysfs_remove_link(&dev->kobj, "irm_id");
798 sysfs_remove_link(&dev->kobj, "busmgr_id");
799 sysfs_remove_link(&dev->kobj, "host_id");
803 static void nodemgr_update_bus_options(struct node_entry *ne)
805 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
806 static const u16 mr[] = { 4, 64, 1024, 0};
808 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
810 ne->busopt.irmc = (busoptions >> 31) & 1;
811 ne->busopt.cmc = (busoptions >> 30) & 1;
812 ne->busopt.isc = (busoptions >> 29) & 1;
813 ne->busopt.bmc = (busoptions >> 28) & 1;
814 ne->busopt.pmc = (busoptions >> 27) & 1;
815 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
816 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
817 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
818 ne->busopt.generation = (busoptions >> 4) & 0xf;
819 ne->busopt.lnkspd = busoptions & 0x7;
821 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
822 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
823 busoptions, ne->busopt.irmc, ne->busopt.cmc,
824 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
825 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
826 mr[ne->busopt.max_rom],
827 ne->busopt.generation, ne->busopt.lnkspd);
831 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
832 struct host_info *hi, nodeid_t nodeid,
833 unsigned int generation)
835 struct hpsb_host *host = hi->host;
836 struct node_entry *ne;
838 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
844 ne->generation = generation;
848 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
851 memcpy(&ne->device, &nodemgr_dev_template_ne,
853 ne->device.parent = &host->device;
854 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
855 (unsigned long long)(ne->guid));
857 ne->class_dev.dev = &ne->device;
858 ne->class_dev.class = &nodemgr_ne_class;
859 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
860 (unsigned long long)(ne->guid));
862 if (device_register(&ne->device))
864 if (class_device_register(&ne->class_dev))
865 goto fail_classdevreg;
866 get_device(&ne->device);
868 nodemgr_create_ne_dev_files(ne);
870 nodemgr_update_bus_options(ne);
872 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
873 (host->node_id == nodeid) ? "Host" : "Node",
874 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
879 device_unregister(&ne->device);
883 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
884 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
890 static struct node_entry *find_entry_by_guid(u64 guid)
892 struct class_device *cdev;
893 struct node_entry *ne, *ret_ne = NULL;
895 down(&nodemgr_ne_class.sem);
896 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
897 ne = container_of(cdev, struct node_entry, class_dev);
899 if (ne->guid == guid) {
904 up(&nodemgr_ne_class.sem);
910 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
913 struct class_device *cdev;
914 struct node_entry *ne, *ret_ne = NULL;
916 down(&nodemgr_ne_class.sem);
917 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
918 ne = container_of(cdev, struct node_entry, class_dev);
920 if (ne->host == host && ne->nodeid == nodeid) {
925 up(&nodemgr_ne_class.sem);
931 static void nodemgr_register_device(struct node_entry *ne,
932 struct unit_directory *ud, struct device *parent)
934 memcpy(&ud->device, &nodemgr_dev_template_ud,
937 ud->device.parent = parent;
939 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
940 ne->device.bus_id, ud->id);
942 ud->class_dev.dev = &ud->device;
943 ud->class_dev.class = &nodemgr_ud_class;
944 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
945 ne->device.bus_id, ud->id);
947 if (device_register(&ud->device))
949 if (class_device_register(&ud->class_dev))
950 goto fail_classdevreg;
951 get_device(&ud->device);
953 nodemgr_create_ud_dev_files(ud);
958 device_unregister(&ud->device);
960 HPSB_ERR("Failed to create unit %s", ud->device.bus_id);
964 /* This implementation currently only scans the config rom and its
965 * immediate unit directories looking for software_id and
966 * software_version entries, in order to get driver autoloading working. */
967 static struct unit_directory *nodemgr_process_unit_directory
968 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
969 unsigned int *id, struct unit_directory *parent)
971 struct unit_directory *ud;
972 struct unit_directory *ud_child = NULL;
973 struct csr1212_dentry *dentry;
974 struct csr1212_keyval *kv;
977 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
979 goto unit_directory_error;
982 ud->ignore_driver = ignore_drivers;
983 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
987 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
988 switch (kv->key.id) {
989 case CSR1212_KV_ID_VENDOR:
990 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
991 ud->vendor_id = kv->value.immediate;
992 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
996 case CSR1212_KV_ID_MODEL:
997 ud->model_id = kv->value.immediate;
998 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
1001 case CSR1212_KV_ID_SPECIFIER_ID:
1002 ud->specifier_id = kv->value.immediate;
1003 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1006 case CSR1212_KV_ID_VERSION:
1007 ud->version = kv->value.immediate;
1008 ud->flags |= UNIT_DIRECTORY_VERSION;
1011 case CSR1212_KV_ID_DESCRIPTOR:
1012 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1013 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1014 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1015 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1016 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1017 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1018 switch (last_key_id) {
1019 case CSR1212_KV_ID_VENDOR:
1020 ud->vendor_name_kv = kv;
1021 csr1212_keep_keyval(kv);
1024 case CSR1212_KV_ID_MODEL:
1025 ud->model_name_kv = kv;
1026 csr1212_keep_keyval(kv);
1030 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1033 case CSR1212_KV_ID_DEPENDENT_INFO:
1034 /* Logical Unit Number */
1035 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1036 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1037 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1039 goto unit_directory_error;
1040 nodemgr_register_device(ne, ud_child, &ne->device);
1045 ud->lun = kv->value.immediate;
1046 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1048 /* Logical Unit Directory */
1049 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1050 /* This should really be done in SBP2 as this is
1051 * doing SBP2 specific parsing.
1054 /* first register the parent unit */
1055 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1056 if (ud->device.bus != &ieee1394_bus_type)
1057 nodemgr_register_device(ne, ud, &ne->device);
1059 /* process the child unit */
1060 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1062 if (ud_child == NULL)
1065 /* inherit unspecified values, the driver core picks it up */
1066 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1067 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1069 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1070 ud_child->model_id = ud->model_id;
1072 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1073 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1075 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1076 ud_child->specifier_id = ud->specifier_id;
1078 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1079 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1081 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1082 ud_child->version = ud->version;
1085 /* register the child unit */
1086 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1087 nodemgr_register_device(ne, ud_child, &ud->device);
1095 last_key_id = kv->key.id;
1098 /* do not process child units here and only if not already registered */
1099 if (!parent && ud->device.bus != &ieee1394_bus_type)
1100 nodemgr_register_device(ne, ud, &ne->device);
1104 unit_directory_error:
1110 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1112 unsigned int ud_id = 0;
1113 struct csr1212_dentry *dentry;
1114 struct csr1212_keyval *kv;
1117 ne->needs_probe = 0;
1119 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1120 switch (kv->key.id) {
1121 case CSR1212_KV_ID_VENDOR:
1122 ne->vendor_id = kv->value.immediate;
1125 case CSR1212_KV_ID_NODE_CAPABILITIES:
1126 ne->capabilities = kv->value.immediate;
1129 case CSR1212_KV_ID_UNIT:
1130 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1133 case CSR1212_KV_ID_DESCRIPTOR:
1134 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1135 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1136 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1137 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1138 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1139 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1140 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1141 ne->vendor_name_kv = kv;
1142 csr1212_keep_keyval(kv);
1147 last_key_id = kv->key.id;
1150 if (ne->vendor_name_kv &&
1151 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv))
1155 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1156 (unsigned long long)ne->guid);
1159 #ifdef CONFIG_HOTPLUG
1161 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1162 char *buffer, int buffer_size)
1164 struct unit_directory *ud;
1167 /* ieee1394:venNmoNspNverN */
1168 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1173 ud = container_of(cdev, struct unit_directory, class_dev);
1175 if (ud->ne->in_limbo || ud->ignore_driver)
1178 #define PUT_ENVP(fmt,val) \
1181 envp[i++] = buffer; \
1182 printed = snprintf(buffer, buffer_size - length, \
1184 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1186 length += printed+1; \
1187 buffer += printed+1; \
1190 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1191 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1192 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1193 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1194 PUT_ENVP("VERSION=%06x", ud->version);
1195 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1200 PUT_ENVP("MODALIAS=%s", buf);
1211 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1212 char *buffer, int buffer_size)
1217 #endif /* CONFIG_HOTPLUG */
1220 int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1221 struct module *owner)
1225 drv->driver.bus = &ieee1394_bus_type;
1226 drv->driver.owner = owner;
1227 drv->driver.name = drv->name;
1229 /* This will cause a probe for devices */
1230 error = driver_register(&drv->driver);
1232 nodemgr_create_drv_files(drv);
1236 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1238 nodemgr_remove_drv_files(driver);
1239 /* This will subsequently disconnect all devices that our driver
1240 * is attached to. */
1241 driver_unregister(&driver->driver);
1246 * This function updates nodes that were present on the bus before the
1247 * reset and still are after the reset. The nodeid and the config rom
1248 * may have changed, and the drivers managing this device must be
1249 * informed that this device just went through a bus reset, to allow
1250 * the to take whatever actions required.
1252 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1253 struct host_info *hi, nodeid_t nodeid,
1254 unsigned int generation)
1256 if (ne->nodeid != nodeid) {
1257 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1258 NODE_BUS_ARGS(ne->host, ne->nodeid),
1259 NODE_BUS_ARGS(ne->host, nodeid));
1260 ne->nodeid = nodeid;
1263 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1264 kfree(ne->csr->private);
1265 csr1212_destroy_csr(ne->csr);
1268 /* If the node's configrom generation has changed, we
1269 * unregister all the unit directories. */
1270 nodemgr_remove_uds(ne);
1272 nodemgr_update_bus_options(ne);
1274 /* Mark the node as new, so it gets re-probed */
1275 ne->needs_probe = 1;
1277 /* old cache is valid, so update its generation */
1278 struct nodemgr_csr_info *ci = ne->csr->private;
1279 ci->generation = generation;
1280 /* free the partially filled now unneeded new cache */
1281 kfree(csr->private);
1282 csr1212_destroy_csr(csr);
1286 nodemgr_resume_ne(ne);
1288 /* Mark the node current */
1289 ne->generation = generation;
1294 static void nodemgr_node_scan_one(struct host_info *hi,
1295 nodeid_t nodeid, int generation)
1297 struct hpsb_host *host = hi->host;
1298 struct node_entry *ne;
1300 struct csr1212_csr *csr;
1301 struct nodemgr_csr_info *ci;
1304 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1309 ci->nodeid = nodeid;
1310 ci->generation = generation;
1312 /* Prepare for speed probe which occurs when reading the ROM */
1313 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1314 if (*speed > host->csr.lnk_spd)
1315 *speed = host->csr.lnk_spd;
1316 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1318 /* We need to detect when the ConfigROM's generation has changed,
1319 * so we only update the node's info when it needs to be. */
1321 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1322 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1323 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1324 NODE_BUS_ARGS(host, nodeid));
1326 csr1212_destroy_csr(csr);
1331 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1332 /* This isn't a 1394 device, but we let it slide. There
1333 * was a report of a device with broken firmware which
1334 * reported '2394' instead of '1394', which is obviously a
1335 * mistake. One would hope that a non-1394 device never
1336 * gets connected to Firewire bus. If someone does, we
1337 * shouldn't be held responsible, so we'll allow it with a
1339 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1340 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1343 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1344 ne = find_entry_by_guid(guid);
1346 if (ne && ne->host != host && ne->in_limbo) {
1347 /* Must have moved this device from one host to another */
1348 nodemgr_remove_ne(ne);
1353 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1355 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1359 static void nodemgr_node_scan(struct host_info *hi, int generation)
1362 struct hpsb_host *host = hi->host;
1363 struct selfid *sid = (struct selfid *)host->topology_map;
1364 nodeid_t nodeid = LOCAL_BUS;
1366 /* Scan each node on the bus */
1367 for (count = host->selfid_count; count; count--, sid++) {
1371 if (!sid->link_active) {
1375 nodemgr_node_scan_one(hi, nodeid++, generation);
1380 static void nodemgr_suspend_ne(struct node_entry *ne)
1382 struct class_device *cdev;
1383 struct unit_directory *ud;
1385 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1386 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1389 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1391 down(&nodemgr_ud_class.sem);
1392 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1393 ud = container_of(cdev, struct unit_directory, class_dev);
1397 down_write(&ieee1394_bus_type.subsys.rwsem);
1398 if (ud->device.driver &&
1399 (!ud->device.driver->suspend ||
1400 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1401 device_release_driver(&ud->device);
1402 up_write(&ieee1394_bus_type.subsys.rwsem);
1404 up(&nodemgr_ud_class.sem);
1408 static void nodemgr_resume_ne(struct node_entry *ne)
1410 struct class_device *cdev;
1411 struct unit_directory *ud;
1414 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1416 down(&nodemgr_ud_class.sem);
1417 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1418 ud = container_of(cdev, struct unit_directory, class_dev);
1422 down_read(&ieee1394_bus_type.subsys.rwsem);
1423 if (ud->device.driver && ud->device.driver->resume)
1424 ud->device.driver->resume(&ud->device);
1425 up_read(&ieee1394_bus_type.subsys.rwsem);
1427 up(&nodemgr_ud_class.sem);
1429 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1430 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1434 static void nodemgr_update_pdrv(struct node_entry *ne)
1436 struct unit_directory *ud;
1437 struct hpsb_protocol_driver *pdrv;
1438 struct class_device *cdev;
1440 down(&nodemgr_ud_class.sem);
1441 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1442 ud = container_of(cdev, struct unit_directory, class_dev);
1446 down_write(&ieee1394_bus_type.subsys.rwsem);
1447 if (ud->device.driver) {
1448 pdrv = container_of(ud->device.driver,
1449 struct hpsb_protocol_driver,
1451 if (pdrv->update && pdrv->update(ud))
1452 device_release_driver(&ud->device);
1454 up_write(&ieee1394_bus_type.subsys.rwsem);
1456 up(&nodemgr_ud_class.sem);
1460 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1461 * seems like an optional service but in the end it is practically mandatory
1462 * as a consequence of these clauses.
1464 * Note that we cannot do a broadcast write to all nodes at once because some
1465 * pre-1394a devices would hang. */
1466 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1468 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1469 quadlet_t bc_remote, bc_local;
1472 if (!ne->host->is_irm || ne->generation != generation ||
1473 ne->nodeid == ne->host->node_id)
1476 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1478 /* Check if the register is implemented and 1394a compliant. */
1479 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1481 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1482 bc_remote != bc_local)
1483 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1487 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1491 if (ne->host != hi->host || ne->in_limbo)
1494 dev = get_device(&ne->device);
1498 nodemgr_irm_write_bc(ne, generation);
1500 /* If "needs_probe", then this is either a new or changed node we
1501 * rescan totally. If the generation matches for an existing node
1502 * (one that existed prior to the bus reset) we send update calls
1503 * down to the drivers. Otherwise, this is a dead node and we
1505 if (ne->needs_probe)
1506 nodemgr_process_root_directory(hi, ne);
1507 else if (ne->generation == generation)
1508 nodemgr_update_pdrv(ne);
1510 nodemgr_suspend_ne(ne);
1516 static void nodemgr_node_probe(struct host_info *hi, int generation)
1518 struct hpsb_host *host = hi->host;
1519 struct class_device *cdev;
1520 struct node_entry *ne;
1522 /* Do some processing of the nodes we've probed. This pulls them
1523 * into the sysfs layer if needed, and can result in processing of
1524 * unit-directories, or just updating the node and it's
1527 * Run updates before probes. Usually, updates are time-critical
1528 * while probes are time-consuming. (Well, those probes need some
1529 * improvement...) */
1531 down(&nodemgr_ne_class.sem);
1532 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1533 ne = container_of(cdev, struct node_entry, class_dev);
1534 if (!ne->needs_probe)
1535 nodemgr_probe_ne(hi, ne, generation);
1537 list_for_each_entry(cdev, &nodemgr_ne_class.children, node) {
1538 ne = container_of(cdev, struct node_entry, class_dev);
1539 if (ne->needs_probe)
1540 nodemgr_probe_ne(hi, ne, generation);
1542 up(&nodemgr_ne_class.sem);
1545 /* If we had a bus reset while we were scanning the bus, it is
1546 * possible that we did not probe all nodes. In that case, we
1547 * skip the clean up for now, since we could remove nodes that
1548 * were still on the bus. Another bus scan is pending which will
1549 * do the clean up eventually.
1551 * Now let's tell the bus to rescan our devices. This may seem
1552 * like overhead, but the driver-model core will only scan a
1553 * device for a driver when either the device is added, or when a
1554 * new driver is added. A bus reset is a good reason to rescan
1555 * devices that were there before. For example, an sbp2 device
1556 * may become available for login, if the host that held it was
1559 if (generation == get_hpsb_generation(host))
1560 if (bus_rescan_devices(&ieee1394_bus_type))
1561 HPSB_DEBUG("bus_rescan_devices had an error");
1564 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1566 struct hpsb_packet *packet;
1567 int error = -ENOMEM;
1569 packet = hpsb_make_phypacket(host,
1570 EXTPHYPACKET_TYPE_RESUME |
1571 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1573 packet->no_waiter = 1;
1574 packet->generation = get_hpsb_generation(host);
1575 error = hpsb_send_packet(packet);
1578 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1583 /* Perform a few high-level IRM responsibilities. */
1584 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1588 /* if irm_id == -1 then there is no IRM on this bus */
1589 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1592 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1593 host->csr.broadcast_channel |= 0x40000000;
1595 /* If there is no bus manager then we should set the root node's
1596 * force_root bit to promote bus stability per the 1394
1597 * spec. (8.4.2.6) */
1598 if (host->busmgr_id == 0xffff && host->node_count > 1)
1600 u16 root_node = host->node_count - 1;
1602 /* get cycle master capability flag from root node */
1603 if (host->is_cycmst ||
1604 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1605 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1606 &bc, sizeof(quadlet_t)) &&
1607 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1608 hpsb_send_phy_config(host, root_node, -1);
1610 HPSB_DEBUG("The root node is not cycle master capable; "
1611 "selecting a new root node and resetting...");
1614 /* Oh screw it! Just leave the bus as it is */
1615 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1619 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1620 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1626 /* Some devices suspend their ports while being connected to an inactive
1627 * host adapter, i.e. if connected before the low-level driver is
1628 * loaded. They become visible either when physically unplugged and
1629 * replugged, or when receiving a resume packet. Send one once. */
1630 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1631 host->resume_packet_sent = 1;
1636 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1637 * everything we can do, otherwise issue a bus reset and try to become the IRM
1639 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1644 if (hpsb_disable_irm || host->is_irm)
1647 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1648 get_hpsb_generation(host),
1649 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1650 &bc, sizeof(quadlet_t));
1652 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1653 /* The current irm node does not have a valid BROADCAST_CHANNEL
1654 * register and we do, so reset the bus with force_root set */
1655 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1658 /* Oh screw it! Just leave the bus as it is */
1659 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1663 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1664 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1672 static int nodemgr_host_thread(void *__hi)
1674 struct host_info *hi = (struct host_info *)__hi;
1675 struct hpsb_host *host = hi->host;
1676 unsigned int g, generation = 0;
1677 int i, reset_cycles = 0;
1679 /* Setup our device-model entries */
1680 nodemgr_create_host_dev_files(host);
1683 /* Sleep until next bus reset */
1684 set_current_state(TASK_INTERRUPTIBLE);
1685 if (get_hpsb_generation(host) == generation)
1687 __set_current_state(TASK_RUNNING);
1689 /* Thread may have been woken up to freeze or to exit */
1690 if (try_to_freeze())
1692 if (kthread_should_stop())
1695 if (mutex_lock_interruptible(&nodemgr_serialize)) {
1696 if (try_to_freeze())
1701 /* Pause for 1/4 second in 1/16 second intervals,
1702 * to make sure things settle down. */
1703 g = get_hpsb_generation(host);
1704 for (i = 0; i < 4 ; i++) {
1705 if (msleep_interruptible(63) || kthread_should_stop())
1708 /* Now get the generation in which the node ID's we collect
1709 * are valid. During the bus scan we will use this generation
1710 * for the read transactions, so that if another reset occurs
1711 * during the scan the transactions will fail instead of
1712 * returning bogus data. */
1713 generation = get_hpsb_generation(host);
1715 /* If we get a reset before we are done waiting, then
1716 * start the the waiting over again */
1717 if (generation != g)
1718 g = generation, i = 0;
1721 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1722 !nodemgr_do_irm_duties(host, reset_cycles)) {
1724 mutex_unlock(&nodemgr_serialize);
1729 /* Scan our nodes to get the bus options and create node
1730 * entries. This does not do the sysfs stuff, since that
1731 * would trigger uevents and such, which is a bad idea at
1733 nodemgr_node_scan(hi, generation);
1735 /* This actually does the full probe, with sysfs
1737 nodemgr_node_probe(hi, generation);
1739 /* Update some of our sysfs symlinks */
1740 nodemgr_update_host_dev_links(host);
1742 mutex_unlock(&nodemgr_serialize);
1745 mutex_unlock(&nodemgr_serialize);
1747 HPSB_VERBOSE("NodeMgr: Exiting thread");
1751 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1753 struct class_device *cdev;
1754 struct hpsb_host *host;
1757 down(&hpsb_host_class.sem);
1758 list_for_each_entry(cdev, &hpsb_host_class.children, node) {
1759 host = container_of(cdev, struct hpsb_host, class_dev);
1761 if ((error = cb(host, __data)))
1764 up(&hpsb_host_class.sem);
1769 /* The following four convenience functions use a struct node_entry
1770 * for addressing a node on the bus. They are intended for use by any
1771 * process context, not just the nodemgr thread, so we need to be a
1772 * little careful when reading out the node ID and generation. The
1773 * thing that can go wrong is that we get the node ID, then a bus
1774 * reset occurs, and then we read the generation. The node ID is
1775 * possibly invalid, but the generation is current, and we end up
1776 * sending a packet to a the wrong node.
1778 * The solution is to make sure we read the generation first, so that
1779 * if a reset occurs in the process, we end up with a stale generation
1780 * and the transactions will fail instead of silently using wrong node
1784 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1786 pkt->host = ne->host;
1787 pkt->generation = ne->generation;
1789 pkt->node_id = ne->nodeid;
1792 int hpsb_node_write(struct node_entry *ne, u64 addr,
1793 quadlet_t *buffer, size_t length)
1795 unsigned int generation = ne->generation;
1798 return hpsb_write(ne->host, ne->nodeid, generation,
1799 addr, buffer, length);
1802 static void nodemgr_add_host(struct hpsb_host *host)
1804 struct host_info *hi;
1806 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1808 HPSB_ERR("NodeMgr: out of memory in add host");
1812 hi->thread = kthread_run(nodemgr_host_thread, hi, "knodemgrd_%d",
1814 if (IS_ERR(hi->thread)) {
1815 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1816 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1820 static void nodemgr_host_reset(struct hpsb_host *host)
1822 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1825 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1826 wake_up_process(hi->thread);
1830 static void nodemgr_remove_host(struct hpsb_host *host)
1832 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1835 kthread_stop(hi->thread);
1836 nodemgr_remove_host_dev(&host->device);
1840 static struct hpsb_highlevel nodemgr_highlevel = {
1841 .name = "Node manager",
1842 .add_host = nodemgr_add_host,
1843 .host_reset = nodemgr_host_reset,
1844 .remove_host = nodemgr_remove_host,
1847 int init_ieee1394_nodemgr(void)
1851 error = class_register(&nodemgr_ne_class);
1855 error = class_register(&nodemgr_ud_class);
1857 class_unregister(&nodemgr_ne_class);
1860 error = driver_register(&nodemgr_mid_layer_driver);
1861 hpsb_register_highlevel(&nodemgr_highlevel);
1865 void cleanup_ieee1394_nodemgr(void)
1867 hpsb_unregister_highlevel(&nodemgr_highlevel);
1869 class_unregister(&nodemgr_ud_class);
1870 class_unregister(&nodemgr_ne_class);