ia64/linux-2.6.18-xen.hg

view drivers/ieee1394/nodemgr.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 /*
2 * Node information (ConfigROM) collection and management.
3 *
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
6 *
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
9 */
11 #include <linux/bitmap.h>
12 #include <linux/kernel.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 <asm/atomic.h>
24 #include "ieee1394_types.h"
25 #include "ieee1394.h"
26 #include "ieee1394_core.h"
27 #include "hosts.h"
28 #include "ieee1394_transactions.h"
29 #include "highlevel.h"
30 #include "csr.h"
31 #include "nodemgr.h"
33 static int ignore_drivers;
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;
39 nodeid_t nodeid;
40 unsigned int generation;
41 unsigned int speed_unverified:1;
42 };
45 static char *nodemgr_find_oui_name(int oui)
46 {
47 #ifdef CONFIG_IEEE1394_OUI_DB
48 extern struct oui_list_struct {
49 int oui;
50 char *name;
51 } oui_list[];
52 int i;
54 for (i = 0; oui_list[i].name; i++)
55 if (oui_list[i].oui == oui)
56 return oui_list[i].name;
57 #endif
58 return NULL;
59 }
61 /*
62 * Correct the speed map entry. This is necessary
63 * - for nodes with link speed < phy speed,
64 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
65 * A possible speed is determined by trial and error, using quadlet reads.
66 */
67 static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
68 quadlet_t *buffer)
69 {
70 quadlet_t q;
71 u8 i, *speed, old_speed, good_speed;
72 int ret;
74 speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid);
75 old_speed = *speed;
76 good_speed = IEEE1394_SPEED_MAX + 1;
78 /* Try every speed from S100 to old_speed.
79 * If we did it the other way around, a too low speed could be caught
80 * if the retry succeeded for some other reason, e.g. because the link
81 * just finished its initialization. */
82 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
83 *speed = i;
84 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
85 &q, sizeof(quadlet_t));
86 if (ret)
87 break;
88 *buffer = q;
89 good_speed = i;
90 }
91 if (good_speed <= IEEE1394_SPEED_MAX) {
92 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
93 NODE_BUS_ARGS(ci->host, ci->nodeid),
94 hpsb_speedto_str[good_speed]);
95 *speed = good_speed;
96 ci->speed_unverified = 0;
97 return 0;
98 }
99 *speed = old_speed;
100 return ret;
101 }
103 static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
104 void *buffer, void *__ci)
105 {
106 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
107 int i, ret;
109 for (i = 1; ; i++) {
110 ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
111 buffer, length);
112 if (!ret) {
113 ci->speed_unverified = 0;
114 break;
115 }
116 /* Give up after 3rd failure. */
117 if (i == 3)
118 break;
120 /* The ieee1394_core guessed the node's speed capability from
121 * the self ID. Check whether a lower speed works. */
122 if (ci->speed_unverified && length == sizeof(quadlet_t)) {
123 ret = nodemgr_check_speed(ci, addr, buffer);
124 if (!ret)
125 break;
126 }
127 if (msleep_interruptible(334))
128 return -EINTR;
129 }
130 return ret;
131 }
133 static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
134 {
135 return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
136 }
138 static struct csr1212_bus_ops nodemgr_csr_ops = {
139 .bus_read = nodemgr_bus_read,
140 .get_max_rom = nodemgr_get_max_rom
141 };
144 /*
145 * Basically what we do here is start off retrieving the bus_info block.
146 * From there will fill in some info about the node, verify it is of IEEE
147 * 1394 type, and that the crc checks out ok. After that we start off with
148 * the root directory, and subdirectories. To do this, we retrieve the
149 * quadlet header for a directory, find out the length, and retrieve the
150 * complete directory entry (be it a leaf or a directory). We then process
151 * it and add the info to our structure for that particular node.
152 *
153 * We verify CRC's along the way for each directory/block/leaf. The entire
154 * node structure is generic, and simply stores the information in a way
155 * that's easy to parse by the protocol interface.
156 */
158 /*
159 * The nodemgr relies heavily on the Driver Model for device callbacks and
160 * driver/device mappings. The old nodemgr used to handle all this itself,
161 * but now we are much simpler because of the LDM.
162 */
164 static DECLARE_MUTEX(nodemgr_serialize);
166 struct host_info {
167 struct hpsb_host *host;
168 struct list_head list;
169 struct completion exited;
170 struct semaphore reset_sem;
171 int pid;
172 char daemon_name[15];
173 int kill_me;
174 };
176 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
177 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
178 char *buffer, int buffer_size);
179 static void nodemgr_resume_ne(struct node_entry *ne);
180 static void nodemgr_remove_ne(struct node_entry *ne);
181 static struct node_entry *find_entry_by_guid(u64 guid);
183 struct bus_type ieee1394_bus_type = {
184 .name = "ieee1394",
185 .match = nodemgr_bus_match,
186 };
188 static void host_cls_release(struct class_device *class_dev)
189 {
190 put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
191 }
193 struct class hpsb_host_class = {
194 .name = "ieee1394_host",
195 .release = host_cls_release,
196 };
198 static void ne_cls_release(struct class_device *class_dev)
199 {
200 put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
201 }
203 static struct class nodemgr_ne_class = {
204 .name = "ieee1394_node",
205 .release = ne_cls_release,
206 };
208 static void ud_cls_release(struct class_device *class_dev)
209 {
210 put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
211 }
213 /* The name here is only so that unit directory hotplug works with old
214 * style hotplug, which only ever did unit directories anyway. */
215 static struct class nodemgr_ud_class = {
216 .name = "ieee1394",
217 .release = ud_cls_release,
218 .uevent = nodemgr_uevent,
219 };
221 static struct hpsb_highlevel nodemgr_highlevel;
224 static void nodemgr_release_ud(struct device *dev)
225 {
226 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
228 if (ud->vendor_name_kv)
229 csr1212_release_keyval(ud->vendor_name_kv);
230 if (ud->model_name_kv)
231 csr1212_release_keyval(ud->model_name_kv);
233 kfree(ud);
234 }
236 static void nodemgr_release_ne(struct device *dev)
237 {
238 struct node_entry *ne = container_of(dev, struct node_entry, device);
240 if (ne->vendor_name_kv)
241 csr1212_release_keyval(ne->vendor_name_kv);
243 kfree(ne);
244 }
247 static void nodemgr_release_host(struct device *dev)
248 {
249 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
251 csr1212_destroy_csr(host->csr.rom);
253 kfree(host);
254 }
256 static int nodemgr_ud_platform_data;
258 static struct device nodemgr_dev_template_ud = {
259 .bus = &ieee1394_bus_type,
260 .release = nodemgr_release_ud,
261 .platform_data = &nodemgr_ud_platform_data,
262 };
264 static struct device nodemgr_dev_template_ne = {
265 .bus = &ieee1394_bus_type,
266 .release = nodemgr_release_ne,
267 };
269 struct device nodemgr_dev_template_host = {
270 .bus = &ieee1394_bus_type,
271 .release = nodemgr_release_host,
272 };
275 #define fw_attr(class, class_type, field, type, format_string) \
276 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
277 { \
278 class_type *class; \
279 class = container_of(dev, class_type, device); \
280 return sprintf(buf, format_string, (type)class->field); \
281 } \
282 static struct device_attribute dev_attr_##class##_##field = { \
283 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
284 .show = fw_show_##class##_##field, \
285 };
287 #define fw_attr_td(class, class_type, td_kv) \
288 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
289 { \
290 int len; \
291 class_type *class = container_of(dev, class_type, device); \
292 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
293 memcpy(buf, \
294 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
295 len); \
296 while ((buf + len - 1) == '\0') \
297 len--; \
298 buf[len++] = '\n'; \
299 buf[len] = '\0'; \
300 return len; \
301 } \
302 static struct device_attribute dev_attr_##class##_##td_kv = { \
303 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
304 .show = fw_show_##class##_##td_kv, \
305 };
308 #define fw_drv_attr(field, type, format_string) \
309 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
310 { \
311 struct hpsb_protocol_driver *driver; \
312 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
313 return sprintf(buf, format_string, (type)driver->field);\
314 } \
315 static struct driver_attribute driver_attr_drv_##field = { \
316 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
317 .show = fw_drv_show_##field, \
318 };
321 static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
322 {
323 struct node_entry *ne = container_of(dev, struct node_entry, device);
325 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
326 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
327 ne->busopt.irmc,
328 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
329 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
330 ne->busopt.max_rec,
331 ne->busopt.max_rom,
332 ne->busopt.cyc_clk_acc);
333 }
334 static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
337 /* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically
338 * here, therefore displayed values may be occasionally wrong. */
339 static ssize_t fw_show_ne_tlabels_free(struct device *dev, struct device_attribute *attr, char *buf)
340 {
341 struct node_entry *ne = container_of(dev, struct node_entry, device);
342 return sprintf(buf, "%d\n", 64 - bitmap_weight(ne->tpool->pool, 64));
343 }
344 static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
347 static ssize_t fw_show_ne_tlabels_allocations(struct device *dev, struct device_attribute *attr, char *buf)
348 {
349 struct node_entry *ne = container_of(dev, struct node_entry, device);
350 return sprintf(buf, "%u\n", ne->tpool->allocations);
351 }
352 static DEVICE_ATTR(tlabels_allocations,S_IRUGO,fw_show_ne_tlabels_allocations,NULL);
355 static ssize_t fw_show_ne_tlabels_mask(struct device *dev, struct device_attribute *attr, char *buf)
356 {
357 struct node_entry *ne = container_of(dev, struct node_entry, device);
358 #if (BITS_PER_LONG <= 32)
359 return sprintf(buf, "0x%08lx%08lx\n", ne->tpool->pool[0], ne->tpool->pool[1]);
360 #else
361 return sprintf(buf, "0x%016lx\n", ne->tpool->pool[0]);
362 #endif
363 }
364 static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
367 static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
368 {
369 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
370 int state = simple_strtoul(buf, NULL, 10);
372 if (state == 1) {
373 down_write(&dev->bus->subsys.rwsem);
374 device_release_driver(dev);
375 ud->ignore_driver = 1;
376 up_write(&dev->bus->subsys.rwsem);
377 } else if (!state)
378 ud->ignore_driver = 0;
380 return count;
381 }
382 static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
383 {
384 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
386 return sprintf(buf, "%d\n", ud->ignore_driver);
387 }
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)
392 {
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)
399 return -EINVAL;
401 nodemgr_remove_ne(ne);
403 return count;
404 }
405 static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
406 {
407 return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
408 }
409 static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
411 static int nodemgr_rescan_bus_thread(void *__unused)
412 {
413 /* No userlevel access needed */
414 daemonize("kfwrescan");
416 bus_rescan_devices(&ieee1394_bus_type);
418 return 0;
419 }
421 static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
422 {
423 int state = simple_strtoul(buf, NULL, 10);
425 /* Don't wait for this, or care about errors. Root could do
426 * something stupid and spawn this a lot of times, but that's
427 * root's fault. */
428 if (state == 1)
429 kernel_thread(nodemgr_rescan_bus_thread, NULL, CLONE_KERNEL);
431 return count;
432 }
433 static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
434 {
435 return sprintf(buf, "You can force a rescan of the bus for "
436 "drivers by writing a 1 to this file\n");
437 }
438 static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
441 static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
442 {
443 int state = simple_strtoul(buf, NULL, 10);
445 if (state == 1)
446 ignore_drivers = 1;
447 else if (!state)
448 ignore_drivers = 0;
450 return count;
451 }
452 static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
453 {
454 return sprintf(buf, "%d\n", ignore_drivers);
455 }
456 static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
459 struct bus_attribute *const fw_bus_attrs[] = {
460 &bus_attr_destroy_node,
461 &bus_attr_rescan,
462 &bus_attr_ignore_drivers,
463 NULL
464 };
467 fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
468 fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
470 fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
471 fw_attr_td(ne, struct node_entry, vendor_name_kv)
472 fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
474 fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
475 fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
476 fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\n")
477 fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
479 static struct device_attribute *const fw_ne_attrs[] = {
480 &dev_attr_ne_guid,
481 &dev_attr_ne_guid_vendor_id,
482 &dev_attr_ne_capabilities,
483 &dev_attr_ne_vendor_id,
484 &dev_attr_ne_nodeid,
485 &dev_attr_bus_options,
486 &dev_attr_tlabels_free,
487 &dev_attr_tlabels_allocations,
488 &dev_attr_tlabels_mask,
489 };
493 fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
494 fw_attr(ud, struct unit_directory, length, int, "%d\n")
495 /* These are all dependent on the value being provided */
496 fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
497 fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
498 fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
499 fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
500 fw_attr_td(ud, struct unit_directory, vendor_name_kv)
501 fw_attr(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
502 fw_attr_td(ud, struct unit_directory, model_name_kv)
504 static struct device_attribute *const fw_ud_attrs[] = {
505 &dev_attr_ud_address,
506 &dev_attr_ud_length,
507 &dev_attr_ignore_driver,
508 };
511 fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
512 fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
513 fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
514 fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
515 fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
516 fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
517 fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
518 fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
520 static struct device_attribute *const fw_host_attrs[] = {
521 &dev_attr_host_node_count,
522 &dev_attr_host_selfid_count,
523 &dev_attr_host_nodes_active,
524 &dev_attr_host_in_bus_reset,
525 &dev_attr_host_is_root,
526 &dev_attr_host_is_cycmst,
527 &dev_attr_host_is_irm,
528 &dev_attr_host_is_busmgr,
529 };
532 static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
533 {
534 struct hpsb_protocol_driver *driver;
535 struct ieee1394_device_id *id;
536 int length = 0;
537 char *scratch = buf;
539 driver = container_of(drv, struct hpsb_protocol_driver, driver);
541 for (id = driver->id_table; id->match_flags != 0; id++) {
542 int need_coma = 0;
544 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
545 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
546 scratch = buf + length;
547 need_coma++;
548 }
550 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
551 length += sprintf(scratch, "%smodel_id=0x%06x",
552 need_coma++ ? "," : "",
553 id->model_id);
554 scratch = buf + length;
555 }
557 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
558 length += sprintf(scratch, "%sspecifier_id=0x%06x",
559 need_coma++ ? "," : "",
560 id->specifier_id);
561 scratch = buf + length;
562 }
564 if (id->match_flags & IEEE1394_MATCH_VERSION) {
565 length += sprintf(scratch, "%sversion=0x%06x",
566 need_coma++ ? "," : "",
567 id->version);
568 scratch = buf + length;
569 }
571 if (need_coma) {
572 *scratch++ = '\n';
573 length++;
574 }
575 }
577 return length;
578 }
579 static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
582 fw_drv_attr(name, const char *, "%s\n")
584 static struct driver_attribute *const fw_drv_attrs[] = {
585 &driver_attr_drv_name,
586 &driver_attr_device_ids,
587 };
590 static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
591 {
592 struct device_driver *drv = &driver->driver;
593 int i;
595 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
596 driver_create_file(drv, fw_drv_attrs[i]);
597 }
600 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
601 {
602 struct device_driver *drv = &driver->driver;
603 int i;
605 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
606 driver_remove_file(drv, fw_drv_attrs[i]);
607 }
610 static void nodemgr_create_ne_dev_files(struct node_entry *ne)
611 {
612 struct device *dev = &ne->device;
613 int i;
615 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
616 device_create_file(dev, fw_ne_attrs[i]);
617 }
620 static void nodemgr_create_host_dev_files(struct hpsb_host *host)
621 {
622 struct device *dev = &host->device;
623 int i;
625 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
626 device_create_file(dev, fw_host_attrs[i]);
627 }
630 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid);
632 static void nodemgr_update_host_dev_links(struct hpsb_host *host)
633 {
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");
643 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
644 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
645 if ((ne = find_entry_by_nodeid(host, host->node_id)))
646 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id");
647 }
649 static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
650 {
651 struct device *dev = &ud->device;
652 int i;
654 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
655 device_create_file(dev, fw_ud_attrs[i]);
657 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
658 device_create_file(dev, &dev_attr_ud_specifier_id);
660 if (ud->flags & UNIT_DIRECTORY_VERSION)
661 device_create_file(dev, &dev_attr_ud_version);
663 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
664 device_create_file(dev, &dev_attr_ud_vendor_id);
665 if (ud->vendor_name_kv)
666 device_create_file(dev, &dev_attr_ud_vendor_name_kv);
667 }
669 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
670 device_create_file(dev, &dev_attr_ud_model_id);
671 if (ud->model_name_kv)
672 device_create_file(dev, &dev_attr_ud_model_name_kv);
673 }
674 }
677 static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
678 {
679 struct hpsb_protocol_driver *driver;
680 struct unit_directory *ud;
681 struct ieee1394_device_id *id;
683 /* We only match unit directories */
684 if (dev->platform_data != &nodemgr_ud_platform_data)
685 return 0;
687 ud = container_of(dev, struct unit_directory, device);
688 driver = container_of(drv, struct hpsb_protocol_driver, driver);
690 if (ud->ne->in_limbo || ud->ignore_driver)
691 return 0;
693 for (id = driver->id_table; id->match_flags != 0; id++) {
694 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
695 id->vendor_id != ud->vendor_id)
696 continue;
698 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
699 id->model_id != ud->model_id)
700 continue;
702 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
703 id->specifier_id != ud->specifier_id)
704 continue;
706 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
707 id->version != ud->version)
708 continue;
710 return 1;
711 }
713 return 0;
714 }
717 static void nodemgr_remove_uds(struct node_entry *ne)
718 {
719 struct class_device *cdev, *next;
720 struct unit_directory *ud;
722 list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
723 ud = container_of(cdev, struct unit_directory, class_dev);
725 if (ud->ne != ne)
726 continue;
728 class_device_unregister(&ud->class_dev);
729 device_unregister(&ud->device);
730 }
731 }
734 static void nodemgr_remove_ne(struct node_entry *ne)
735 {
736 struct device *dev = &ne->device;
738 dev = get_device(&ne->device);
739 if (!dev)
740 return;
742 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
743 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
745 nodemgr_remove_uds(ne);
747 class_device_unregister(&ne->class_dev);
748 device_unregister(dev);
750 put_device(dev);
751 }
753 static int __nodemgr_remove_host_dev(struct device *dev, void *data)
754 {
755 nodemgr_remove_ne(container_of(dev, struct node_entry, device));
756 return 0;
757 }
759 static void nodemgr_remove_host_dev(struct device *dev)
760 {
761 device_for_each_child(dev, NULL, __nodemgr_remove_host_dev);
762 sysfs_remove_link(&dev->kobj, "irm_id");
763 sysfs_remove_link(&dev->kobj, "busmgr_id");
764 sysfs_remove_link(&dev->kobj, "host_id");
765 }
768 static void nodemgr_update_bus_options(struct node_entry *ne)
769 {
770 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
771 static const u16 mr[] = { 4, 64, 1024, 0};
772 #endif
773 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
775 ne->busopt.irmc = (busoptions >> 31) & 1;
776 ne->busopt.cmc = (busoptions >> 30) & 1;
777 ne->busopt.isc = (busoptions >> 29) & 1;
778 ne->busopt.bmc = (busoptions >> 28) & 1;
779 ne->busopt.pmc = (busoptions >> 27) & 1;
780 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
781 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
782 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
783 ne->busopt.generation = (busoptions >> 4) & 0xf;
784 ne->busopt.lnkspd = busoptions & 0x7;
786 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
787 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
788 busoptions, ne->busopt.irmc, ne->busopt.cmc,
789 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
790 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
791 mr[ne->busopt.max_rom],
792 ne->busopt.generation, ne->busopt.lnkspd);
793 }
796 static struct node_entry *nodemgr_create_node(octlet_t guid, struct csr1212_csr *csr,
797 struct host_info *hi, nodeid_t nodeid,
798 unsigned int generation)
799 {
800 struct hpsb_host *host = hi->host;
801 struct node_entry *ne;
803 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
804 if (!ne)
805 return NULL;
807 ne->tpool = &host->tpool[nodeid & NODE_MASK];
809 ne->host = host;
810 ne->nodeid = nodeid;
811 ne->generation = generation;
812 ne->needs_probe = 1;
814 ne->guid = guid;
815 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
816 ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
817 ne->csr = csr;
819 memcpy(&ne->device, &nodemgr_dev_template_ne,
820 sizeof(ne->device));
821 ne->device.parent = &host->device;
822 snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
823 (unsigned long long)(ne->guid));
825 ne->class_dev.dev = &ne->device;
826 ne->class_dev.class = &nodemgr_ne_class;
827 snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
828 (unsigned long long)(ne->guid));
830 device_register(&ne->device);
831 class_device_register(&ne->class_dev);
832 get_device(&ne->device);
834 if (ne->guid_vendor_oui)
835 device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
836 nodemgr_create_ne_dev_files(ne);
838 nodemgr_update_bus_options(ne);
840 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
841 (host->node_id == nodeid) ? "Host" : "Node",
842 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
844 return ne;
845 }
848 static struct node_entry *find_entry_by_guid(u64 guid)
849 {
850 struct class *class = &nodemgr_ne_class;
851 struct class_device *cdev;
852 struct node_entry *ne, *ret_ne = NULL;
854 down_read(&class->subsys.rwsem);
855 list_for_each_entry(cdev, &class->children, node) {
856 ne = container_of(cdev, struct node_entry, class_dev);
858 if (ne->guid == guid) {
859 ret_ne = ne;
860 break;
861 }
862 }
863 up_read(&class->subsys.rwsem);
865 return ret_ne;
866 }
869 static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
870 {
871 struct class *class = &nodemgr_ne_class;
872 struct class_device *cdev;
873 struct node_entry *ne, *ret_ne = NULL;
875 down_read(&class->subsys.rwsem);
876 list_for_each_entry(cdev, &class->children, node) {
877 ne = container_of(cdev, struct node_entry, class_dev);
879 if (ne->host == host && ne->nodeid == nodeid) {
880 ret_ne = ne;
881 break;
882 }
883 }
884 up_read(&class->subsys.rwsem);
886 return ret_ne;
887 }
890 static void nodemgr_register_device(struct node_entry *ne,
891 struct unit_directory *ud, struct device *parent)
892 {
893 memcpy(&ud->device, &nodemgr_dev_template_ud,
894 sizeof(ud->device));
896 ud->device.parent = parent;
898 snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
899 ne->device.bus_id, ud->id);
901 ud->class_dev.dev = &ud->device;
902 ud->class_dev.class = &nodemgr_ud_class;
903 snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
904 ne->device.bus_id, ud->id);
906 device_register(&ud->device);
907 class_device_register(&ud->class_dev);
908 get_device(&ud->device);
910 if (ud->vendor_oui)
911 device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
912 nodemgr_create_ud_dev_files(ud);
913 }
916 /* This implementation currently only scans the config rom and its
917 * immediate unit directories looking for software_id and
918 * software_version entries, in order to get driver autoloading working. */
919 static struct unit_directory *nodemgr_process_unit_directory
920 (struct host_info *hi, struct node_entry *ne, struct csr1212_keyval *ud_kv,
921 unsigned int *id, struct unit_directory *parent)
922 {
923 struct unit_directory *ud;
924 struct unit_directory *ud_child = NULL;
925 struct csr1212_dentry *dentry;
926 struct csr1212_keyval *kv;
927 u8 last_key_id = 0;
929 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
930 if (!ud)
931 goto unit_directory_error;
933 ud->ne = ne;
934 ud->ignore_driver = ignore_drivers;
935 ud->address = ud_kv->offset + CSR1212_CONFIG_ROM_SPACE_BASE;
936 ud->ud_kv = ud_kv;
937 ud->id = (*id)++;
939 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
940 switch (kv->key.id) {
941 case CSR1212_KV_ID_VENDOR:
942 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
943 ud->vendor_id = kv->value.immediate;
944 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
946 if (ud->vendor_id)
947 ud->vendor_oui = nodemgr_find_oui_name(ud->vendor_id);
948 }
949 break;
951 case CSR1212_KV_ID_MODEL:
952 ud->model_id = kv->value.immediate;
953 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
954 break;
956 case CSR1212_KV_ID_SPECIFIER_ID:
957 ud->specifier_id = kv->value.immediate;
958 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
959 break;
961 case CSR1212_KV_ID_VERSION:
962 ud->version = kv->value.immediate;
963 ud->flags |= UNIT_DIRECTORY_VERSION;
964 break;
966 case CSR1212_KV_ID_DESCRIPTOR:
967 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
968 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
969 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
970 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
971 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
972 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
973 switch (last_key_id) {
974 case CSR1212_KV_ID_VENDOR:
975 ud->vendor_name_kv = kv;
976 csr1212_keep_keyval(kv);
977 break;
979 case CSR1212_KV_ID_MODEL:
980 ud->model_name_kv = kv;
981 csr1212_keep_keyval(kv);
982 break;
984 }
985 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
986 break;
988 case CSR1212_KV_ID_DEPENDENT_INFO:
989 /* Logical Unit Number */
990 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
991 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
992 ud_child = kmalloc(sizeof(*ud_child), GFP_KERNEL);
993 if (!ud_child)
994 goto unit_directory_error;
995 memcpy(ud_child, ud, sizeof(*ud_child));
996 nodemgr_register_device(ne, ud_child, &ne->device);
997 ud_child = NULL;
999 ud->id = (*id)++;
1001 ud->lun = kv->value.immediate;
1002 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1004 /* Logical Unit Directory */
1005 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1006 /* This should really be done in SBP2 as this is
1007 * doing SBP2 specific parsing.
1008 */
1010 /* first register the parent unit */
1011 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1012 if (ud->device.bus != &ieee1394_bus_type)
1013 nodemgr_register_device(ne, ud, &ne->device);
1015 /* process the child unit */
1016 ud_child = nodemgr_process_unit_directory(hi, ne, kv, id, ud);
1018 if (ud_child == NULL)
1019 break;
1021 /* inherit unspecified values, the driver core picks it up */
1022 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1023 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1025 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1026 ud_child->model_id = ud->model_id;
1028 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1029 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1031 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1032 ud_child->specifier_id = ud->specifier_id;
1034 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1035 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1037 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1038 ud_child->version = ud->version;
1041 /* register the child unit */
1042 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1043 nodemgr_register_device(ne, ud_child, &ud->device);
1046 break;
1048 default:
1049 break;
1051 last_key_id = kv->key.id;
1054 /* do not process child units here and only if not already registered */
1055 if (!parent && ud->device.bus != &ieee1394_bus_type)
1056 nodemgr_register_device(ne, ud, &ne->device);
1058 return ud;
1060 unit_directory_error:
1061 kfree(ud);
1062 return NULL;
1066 static void nodemgr_process_root_directory(struct host_info *hi, struct node_entry *ne)
1068 unsigned int ud_id = 0;
1069 struct csr1212_dentry *dentry;
1070 struct csr1212_keyval *kv;
1071 u8 last_key_id = 0;
1073 ne->needs_probe = 0;
1075 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1076 switch (kv->key.id) {
1077 case CSR1212_KV_ID_VENDOR:
1078 ne->vendor_id = kv->value.immediate;
1080 if (ne->vendor_id)
1081 ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
1082 break;
1084 case CSR1212_KV_ID_NODE_CAPABILITIES:
1085 ne->capabilities = kv->value.immediate;
1086 break;
1088 case CSR1212_KV_ID_UNIT:
1089 nodemgr_process_unit_directory(hi, ne, kv, &ud_id, NULL);
1090 break;
1092 case CSR1212_KV_ID_DESCRIPTOR:
1093 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1094 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1095 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1096 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1097 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1098 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1099 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1100 ne->vendor_name_kv = kv;
1101 csr1212_keep_keyval(kv);
1104 break;
1106 last_key_id = kv->key.id;
1109 if (ne->vendor_oui)
1110 device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
1111 if (ne->vendor_name_kv)
1112 device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
1115 #ifdef CONFIG_HOTPLUG
1117 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1118 char *buffer, int buffer_size)
1120 struct unit_directory *ud;
1121 int i = 0;
1122 int length = 0;
1123 /* ieee1394:venNmoNspNverN */
1124 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1126 if (!cdev)
1127 return -ENODEV;
1129 ud = container_of(cdev, struct unit_directory, class_dev);
1131 if (ud->ne->in_limbo || ud->ignore_driver)
1132 return -ENODEV;
1134 #define PUT_ENVP(fmt,val) \
1135 do { \
1136 int printed; \
1137 envp[i++] = buffer; \
1138 printed = snprintf(buffer, buffer_size - length, \
1139 fmt, val); \
1140 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1141 return -ENOMEM; \
1142 length += printed+1; \
1143 buffer += printed+1; \
1144 } while (0)
1146 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1147 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1148 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1149 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1150 PUT_ENVP("VERSION=%06x", ud->version);
1151 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1152 ud->vendor_id,
1153 ud->model_id,
1154 ud->specifier_id,
1155 ud->version);
1156 PUT_ENVP("MODALIAS=%s", buf);
1158 #undef PUT_ENVP
1160 envp[i] = NULL;
1162 return 0;
1165 #else
1167 static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
1168 char *buffer, int buffer_size)
1170 return -ENODEV;
1173 #endif /* CONFIG_HOTPLUG */
1176 int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
1178 int ret;
1180 /* This will cause a probe for devices */
1181 ret = driver_register(&driver->driver);
1182 if (!ret)
1183 nodemgr_create_drv_files(driver);
1185 return ret;
1188 void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1190 nodemgr_remove_drv_files(driver);
1191 /* This will subsequently disconnect all devices that our driver
1192 * is attached to. */
1193 driver_unregister(&driver->driver);
1197 /*
1198 * This function updates nodes that were present on the bus before the
1199 * reset and still are after the reset. The nodeid and the config rom
1200 * may have changed, and the drivers managing this device must be
1201 * informed that this device just went through a bus reset, to allow
1202 * the to take whatever actions required.
1203 */
1204 static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1205 struct host_info *hi, nodeid_t nodeid,
1206 unsigned int generation)
1208 if (ne->nodeid != nodeid) {
1209 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1210 NODE_BUS_ARGS(ne->host, ne->nodeid),
1211 NODE_BUS_ARGS(ne->host, nodeid));
1212 ne->nodeid = nodeid;
1215 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1216 kfree(ne->csr->private);
1217 csr1212_destroy_csr(ne->csr);
1218 ne->csr = csr;
1220 /* If the node's configrom generation has changed, we
1221 * unregister all the unit directories. */
1222 nodemgr_remove_uds(ne);
1224 nodemgr_update_bus_options(ne);
1226 /* Mark the node as new, so it gets re-probed */
1227 ne->needs_probe = 1;
1228 } else {
1229 /* old cache is valid, so update its generation */
1230 struct nodemgr_csr_info *ci = ne->csr->private;
1231 ci->generation = generation;
1232 /* free the partially filled now unneeded new cache */
1233 kfree(csr->private);
1234 csr1212_destroy_csr(csr);
1237 if (ne->in_limbo)
1238 nodemgr_resume_ne(ne);
1240 /* Mark the node current */
1241 ne->generation = generation;
1246 static void nodemgr_node_scan_one(struct host_info *hi,
1247 nodeid_t nodeid, int generation)
1249 struct hpsb_host *host = hi->host;
1250 struct node_entry *ne;
1251 octlet_t guid;
1252 struct csr1212_csr *csr;
1253 struct nodemgr_csr_info *ci;
1255 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1256 if (!ci)
1257 return;
1259 ci->host = host;
1260 ci->nodeid = nodeid;
1261 ci->generation = generation;
1262 ci->speed_unverified =
1263 host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100;
1265 /* We need to detect when the ConfigROM's generation has changed,
1266 * so we only update the node's info when it needs to be. */
1268 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1269 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1270 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1271 NODE_BUS_ARGS(host, nodeid));
1272 if (csr)
1273 csr1212_destroy_csr(csr);
1274 kfree(ci);
1275 return;
1278 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1279 /* This isn't a 1394 device, but we let it slide. There
1280 * was a report of a device with broken firmware which
1281 * reported '2394' instead of '1394', which is obviously a
1282 * mistake. One would hope that a non-1394 device never
1283 * gets connected to Firewire bus. If someone does, we
1284 * shouldn't be held responsible, so we'll allow it with a
1285 * warning. */
1286 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1287 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1290 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1291 ne = find_entry_by_guid(guid);
1293 if (ne && ne->host != host && ne->in_limbo) {
1294 /* Must have moved this device from one host to another */
1295 nodemgr_remove_ne(ne);
1296 ne = NULL;
1299 if (!ne)
1300 nodemgr_create_node(guid, csr, hi, nodeid, generation);
1301 else
1302 nodemgr_update_node(ne, csr, hi, nodeid, generation);
1304 return;
1308 static void nodemgr_node_scan(struct host_info *hi, int generation)
1310 int count;
1311 struct hpsb_host *host = hi->host;
1312 struct selfid *sid = (struct selfid *)host->topology_map;
1313 nodeid_t nodeid = LOCAL_BUS;
1315 /* Scan each node on the bus */
1316 for (count = host->selfid_count; count; count--, sid++) {
1317 if (sid->extended)
1318 continue;
1320 if (!sid->link_active) {
1321 nodeid++;
1322 continue;
1324 nodemgr_node_scan_one(hi, nodeid++, generation);
1329 static void nodemgr_suspend_ne(struct node_entry *ne)
1331 struct class_device *cdev;
1332 struct unit_directory *ud;
1334 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1335 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1337 ne->in_limbo = 1;
1338 device_create_file(&ne->device, &dev_attr_ne_in_limbo);
1340 down_write(&ne->device.bus->subsys.rwsem);
1341 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1342 ud = container_of(cdev, struct unit_directory, class_dev);
1344 if (ud->ne != ne)
1345 continue;
1347 if (ud->device.driver &&
1348 (!ud->device.driver->suspend ||
1349 ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
1350 device_release_driver(&ud->device);
1352 up_write(&ne->device.bus->subsys.rwsem);
1356 static void nodemgr_resume_ne(struct node_entry *ne)
1358 struct class_device *cdev;
1359 struct unit_directory *ud;
1361 ne->in_limbo = 0;
1362 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1364 down_read(&ne->device.bus->subsys.rwsem);
1365 list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
1366 ud = container_of(cdev, struct unit_directory, class_dev);
1368 if (ud->ne != ne)
1369 continue;
1371 if (ud->device.driver && ud->device.driver->resume)
1372 ud->device.driver->resume(&ud->device);
1374 up_read(&ne->device.bus->subsys.rwsem);
1376 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1377 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
1381 static void nodemgr_update_pdrv(struct node_entry *ne)
1383 struct unit_directory *ud;
1384 struct hpsb_protocol_driver *pdrv;
1385 struct class *class = &nodemgr_ud_class;
1386 struct class_device *cdev;
1388 down_read(&class->subsys.rwsem);
1389 list_for_each_entry(cdev, &class->children, node) {
1390 ud = container_of(cdev, struct unit_directory, class_dev);
1391 if (ud->ne != ne || !ud->device.driver)
1392 continue;
1394 pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
1396 if (pdrv->update && pdrv->update(ud)) {
1397 down_write(&ud->device.bus->subsys.rwsem);
1398 device_release_driver(&ud->device);
1399 up_write(&ud->device.bus->subsys.rwsem);
1402 up_read(&class->subsys.rwsem);
1406 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1407 * seems like an optional service but in the end it is practically mandatory
1408 * as a consequence of these clauses.
1410 * Note that we cannot do a broadcast write to all nodes at once because some
1411 * pre-1394a devices would hang. */
1412 static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1414 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1415 quadlet_t bc_remote, bc_local;
1416 int ret;
1418 if (!ne->host->is_irm || ne->generation != generation ||
1419 ne->nodeid == ne->host->node_id)
1420 return;
1422 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1424 /* Check if the register is implemented and 1394a compliant. */
1425 ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1426 sizeof(bc_remote));
1427 if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
1428 bc_remote != bc_local)
1429 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1433 static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
1435 struct device *dev;
1437 if (ne->host != hi->host || ne->in_limbo)
1438 return;
1440 dev = get_device(&ne->device);
1441 if (!dev)
1442 return;
1444 nodemgr_irm_write_bc(ne, generation);
1446 /* If "needs_probe", then this is either a new or changed node we
1447 * rescan totally. If the generation matches for an existing node
1448 * (one that existed prior to the bus reset) we send update calls
1449 * down to the drivers. Otherwise, this is a dead node and we
1450 * suspend it. */
1451 if (ne->needs_probe)
1452 nodemgr_process_root_directory(hi, ne);
1453 else if (ne->generation == generation)
1454 nodemgr_update_pdrv(ne);
1455 else
1456 nodemgr_suspend_ne(ne);
1458 put_device(dev);
1462 static void nodemgr_node_probe(struct host_info *hi, int generation)
1464 struct hpsb_host *host = hi->host;
1465 struct class *class = &nodemgr_ne_class;
1466 struct class_device *cdev;
1467 struct node_entry *ne;
1469 /* Do some processing of the nodes we've probed. This pulls them
1470 * into the sysfs layer if needed, and can result in processing of
1471 * unit-directories, or just updating the node and it's
1472 * unit-directories.
1474 * Run updates before probes. Usually, updates are time-critical
1475 * while probes are time-consuming. (Well, those probes need some
1476 * improvement...) */
1478 down_read(&class->subsys.rwsem);
1479 list_for_each_entry(cdev, &class->children, node) {
1480 ne = container_of(cdev, struct node_entry, class_dev);
1481 if (!ne->needs_probe)
1482 nodemgr_probe_ne(hi, ne, generation);
1484 list_for_each_entry(cdev, &class->children, node) {
1485 ne = container_of(cdev, struct node_entry, class_dev);
1486 if (ne->needs_probe)
1487 nodemgr_probe_ne(hi, ne, generation);
1489 up_read(&class->subsys.rwsem);
1492 /* If we had a bus reset while we were scanning the bus, it is
1493 * possible that we did not probe all nodes. In that case, we
1494 * skip the clean up for now, since we could remove nodes that
1495 * were still on the bus. The bus reset increased hi->reset_sem,
1496 * so there's a bus scan pending which will do the clean up
1497 * eventually.
1499 * Now let's tell the bus to rescan our devices. This may seem
1500 * like overhead, but the driver-model core will only scan a
1501 * device for a driver when either the device is added, or when a
1502 * new driver is added. A bus reset is a good reason to rescan
1503 * devices that were there before. For example, an sbp2 device
1504 * may become available for login, if the host that held it was
1505 * just removed. */
1507 if (generation == get_hpsb_generation(host))
1508 bus_rescan_devices(&ieee1394_bus_type);
1510 return;
1513 static int nodemgr_send_resume_packet(struct hpsb_host *host)
1515 struct hpsb_packet *packet;
1516 int ret = 1;
1518 packet = hpsb_make_phypacket(host,
1519 EXTPHYPACKET_TYPE_RESUME |
1520 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1521 if (packet) {
1522 packet->no_waiter = 1;
1523 packet->generation = get_hpsb_generation(host);
1524 ret = hpsb_send_packet(packet);
1526 if (ret)
1527 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1528 host->id);
1529 return ret;
1532 /* Perform a few high-level IRM responsibilities. */
1533 static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1535 quadlet_t bc;
1537 /* if irm_id == -1 then there is no IRM on this bus */
1538 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1539 return 1;
1541 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1542 host->csr.broadcast_channel |= 0x40000000;
1544 /* If there is no bus manager then we should set the root node's
1545 * force_root bit to promote bus stability per the 1394
1546 * spec. (8.4.2.6) */
1547 if (host->busmgr_id == 0xffff && host->node_count > 1)
1549 u16 root_node = host->node_count - 1;
1551 /* get cycle master capability flag from root node */
1552 if (host->is_cycmst ||
1553 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1554 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1555 &bc, sizeof(quadlet_t)) &&
1556 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1557 hpsb_send_phy_config(host, root_node, -1);
1558 else {
1559 HPSB_DEBUG("The root node is not cycle master capable; "
1560 "selecting a new root node and resetting...");
1562 if (cycles >= 5) {
1563 /* Oh screw it! Just leave the bus as it is */
1564 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1565 return 1;
1568 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1569 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1571 return 0;
1575 /* Some devices suspend their ports while being connected to an inactive
1576 * host adapter, i.e. if connected before the low-level driver is
1577 * loaded. They become visible either when physically unplugged and
1578 * replugged, or when receiving a resume packet. Send one once. */
1579 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1580 host->resume_packet_sent = 1;
1582 return 1;
1585 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1586 * everything we can do, otherwise issue a bus reset and try to become the IRM
1587 * ourselves. */
1588 static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1590 quadlet_t bc;
1591 int status;
1593 if (hpsb_disable_irm || host->is_irm)
1594 return 1;
1596 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1597 get_hpsb_generation(host),
1598 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1599 &bc, sizeof(quadlet_t));
1601 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1602 /* The current irm node does not have a valid BROADCAST_CHANNEL
1603 * register and we do, so reset the bus with force_root set */
1604 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1606 if (cycles >= 5) {
1607 /* Oh screw it! Just leave the bus as it is */
1608 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1609 return 1;
1612 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1613 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1615 return 0;
1618 return 1;
1621 static int nodemgr_host_thread(void *__hi)
1623 struct host_info *hi = (struct host_info *)__hi;
1624 struct hpsb_host *host = hi->host;
1625 int reset_cycles = 0;
1627 /* No userlevel access needed */
1628 daemonize(hi->daemon_name);
1630 /* Setup our device-model entries */
1631 nodemgr_create_host_dev_files(host);
1633 /* Sit and wait for a signal to probe the nodes on the bus. This
1634 * happens when we get a bus reset. */
1635 while (1) {
1636 unsigned int generation = 0;
1637 int i;
1639 if (down_interruptible(&hi->reset_sem) ||
1640 down_interruptible(&nodemgr_serialize)) {
1641 if (try_to_freeze())
1642 continue;
1643 printk("NodeMgr: received unexpected signal?!\n" );
1644 break;
1647 if (hi->kill_me) {
1648 up(&nodemgr_serialize);
1649 break;
1652 /* Pause for 1/4 second in 1/16 second intervals,
1653 * to make sure things settle down. */
1654 for (i = 0; i < 4 ; i++) {
1655 set_current_state(TASK_INTERRUPTIBLE);
1656 if (msleep_interruptible(63)) {
1657 up(&nodemgr_serialize);
1658 goto caught_signal;
1661 /* Now get the generation in which the node ID's we collect
1662 * are valid. During the bus scan we will use this generation
1663 * for the read transactions, so that if another reset occurs
1664 * during the scan the transactions will fail instead of
1665 * returning bogus data. */
1666 generation = get_hpsb_generation(host);
1668 /* If we get a reset before we are done waiting, then
1669 * start the the waiting over again */
1670 while (!down_trylock(&hi->reset_sem))
1671 i = 0;
1673 /* Check the kill_me again */
1674 if (hi->kill_me) {
1675 up(&nodemgr_serialize);
1676 goto caught_signal;
1680 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1681 !nodemgr_do_irm_duties(host, reset_cycles)) {
1682 reset_cycles++;
1683 up(&nodemgr_serialize);
1684 continue;
1686 reset_cycles = 0;
1688 /* Scan our nodes to get the bus options and create node
1689 * entries. This does not do the sysfs stuff, since that
1690 * would trigger uevents and such, which is a bad idea at
1691 * this point. */
1692 nodemgr_node_scan(hi, generation);
1694 /* This actually does the full probe, with sysfs
1695 * registration. */
1696 nodemgr_node_probe(hi, generation);
1698 /* Update some of our sysfs symlinks */
1699 nodemgr_update_host_dev_links(host);
1701 up(&nodemgr_serialize);
1704 caught_signal:
1705 HPSB_VERBOSE("NodeMgr: Exiting thread");
1707 complete_and_exit(&hi->exited, 0);
1710 int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
1712 struct class *class = &hpsb_host_class;
1713 struct class_device *cdev;
1714 struct hpsb_host *host;
1715 int error = 0;
1717 down_read(&class->subsys.rwsem);
1718 list_for_each_entry(cdev, &class->children, node) {
1719 host = container_of(cdev, struct hpsb_host, class_dev);
1721 if ((error = cb(host, __data)))
1722 break;
1724 up_read(&class->subsys.rwsem);
1726 return error;
1729 /* The following four convenience functions use a struct node_entry
1730 * for addressing a node on the bus. They are intended for use by any
1731 * process context, not just the nodemgr thread, so we need to be a
1732 * little careful when reading out the node ID and generation. The
1733 * thing that can go wrong is that we get the node ID, then a bus
1734 * reset occurs, and then we read the generation. The node ID is
1735 * possibly invalid, but the generation is current, and we end up
1736 * sending a packet to a the wrong node.
1738 * The solution is to make sure we read the generation first, so that
1739 * if a reset occurs in the process, we end up with a stale generation
1740 * and the transactions will fail instead of silently using wrong node
1741 * ID's.
1742 */
1744 void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
1746 pkt->host = ne->host;
1747 pkt->generation = ne->generation;
1748 barrier();
1749 pkt->node_id = ne->nodeid;
1752 int hpsb_node_write(struct node_entry *ne, u64 addr,
1753 quadlet_t *buffer, size_t length)
1755 unsigned int generation = ne->generation;
1757 barrier();
1758 return hpsb_write(ne->host, ne->nodeid, generation,
1759 addr, buffer, length);
1762 static void nodemgr_add_host(struct hpsb_host *host)
1764 struct host_info *hi;
1766 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1768 if (!hi) {
1769 HPSB_ERR ("NodeMgr: out of memory in add host");
1770 return;
1773 hi->host = host;
1774 init_completion(&hi->exited);
1775 sema_init(&hi->reset_sem, 0);
1777 sprintf(hi->daemon_name, "knodemgrd_%d", host->id);
1779 hi->pid = kernel_thread(nodemgr_host_thread, hi, CLONE_KERNEL);
1781 if (hi->pid < 0) {
1782 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1783 hi->daemon_name, host->driver->name);
1784 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1785 return;
1788 return;
1791 static void nodemgr_host_reset(struct hpsb_host *host)
1793 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1795 if (hi != NULL) {
1796 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi->daemon_name);
1797 up(&hi->reset_sem);
1798 } else
1799 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1801 return;
1804 static void nodemgr_remove_host(struct hpsb_host *host)
1806 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1808 if (hi) {
1809 if (hi->pid >= 0) {
1810 hi->kill_me = 1;
1811 mb();
1812 up(&hi->reset_sem);
1813 wait_for_completion(&hi->exited);
1814 nodemgr_remove_host_dev(&host->device);
1816 } else
1817 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1818 host->driver->name);
1820 return;
1823 static struct hpsb_highlevel nodemgr_highlevel = {
1824 .name = "Node manager",
1825 .add_host = nodemgr_add_host,
1826 .host_reset = nodemgr_host_reset,
1827 .remove_host = nodemgr_remove_host,
1828 };
1830 int init_ieee1394_nodemgr(void)
1832 int ret;
1834 ret = class_register(&nodemgr_ne_class);
1835 if (ret < 0)
1836 return ret;
1838 ret = class_register(&nodemgr_ud_class);
1839 if (ret < 0) {
1840 class_unregister(&nodemgr_ne_class);
1841 return ret;
1844 hpsb_register_highlevel(&nodemgr_highlevel);
1846 return 0;
1849 void cleanup_ieee1394_nodemgr(void)
1851 hpsb_unregister_highlevel(&nodemgr_highlevel);
1853 class_unregister(&nodemgr_ud_class);
1854 class_unregister(&nodemgr_ne_class);