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-rw-r--r--drivers/ieee1394/nodemgr.c1901
1 files changed, 0 insertions, 1901 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
deleted file mode 100644
index 18350213479e..000000000000
--- a/drivers/ieee1394/nodemgr.c
+++ /dev/null
@@ -1,1901 +0,0 @@
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 */
10
11#include <linux/bitmap.h>
12#include <linux/kernel.h>
13#include <linux/kmemcheck.h>
14#include <linux/list.h>
15#include <linux/slab.h>
16#include <linux/delay.h>
17#include <linux/kthread.h>
18#include <linux/module.h>
19#include <linux/moduleparam.h>
20#include <linux/mutex.h>
21#include <linux/freezer.h>
22#include <asm/atomic.h>
23
24#include "csr.h"
25#include "highlevel.h"
26#include "hosts.h"
27#include "ieee1394.h"
28#include "ieee1394_core.h"
29#include "ieee1394_hotplug.h"
30#include "ieee1394_types.h"
31#include "ieee1394_transactions.h"
32#include "nodemgr.h"
33
34static int ignore_drivers;
35module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
36MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
37
38struct nodemgr_csr_info {
39 struct hpsb_host *host;
40 nodeid_t nodeid;
41 unsigned int generation;
42
43 kmemcheck_bitfield_begin(flags);
44 unsigned int speed_unverified:1;
45 kmemcheck_bitfield_end(flags);
46};
47
48
49/*
50 * Correct the speed map entry. This is necessary
51 * - for nodes with link speed < phy speed,
52 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
53 * A possible speed is determined by trial and error, using quadlet reads.
54 */
55static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
56 quadlet_t *buffer)
57{
58 quadlet_t q;
59 u8 i, *speed, old_speed, good_speed;
60 int error;
61
62 speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
63 old_speed = *speed;
64 good_speed = IEEE1394_SPEED_MAX + 1;
65
66 /* Try every speed from S100 to old_speed.
67 * If we did it the other way around, a too low speed could be caught
68 * if the retry succeeded for some other reason, e.g. because the link
69 * just finished its initialization. */
70 for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
71 *speed = i;
72 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
73 &q, 4);
74 if (error)
75 break;
76 *buffer = q;
77 good_speed = i;
78 }
79 if (good_speed <= IEEE1394_SPEED_MAX) {
80 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
81 NODE_BUS_ARGS(ci->host, ci->nodeid),
82 hpsb_speedto_str[good_speed]);
83 *speed = good_speed;
84 ci->speed_unverified = 0;
85 return 0;
86 }
87 *speed = old_speed;
88 return error;
89}
90
91static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
92 void *buffer, void *__ci)
93{
94 struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
95 int i, error;
96
97 for (i = 1; ; i++) {
98 error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
99 buffer, 4);
100 if (!error) {
101 ci->speed_unverified = 0;
102 break;
103 }
104 /* Give up after 3rd failure. */
105 if (i == 3)
106 break;
107
108 /* The ieee1394_core guessed the node's speed capability from
109 * the self ID. Check whether a lower speed works. */
110 if (ci->speed_unverified) {
111 error = nodemgr_check_speed(ci, addr, buffer);
112 if (!error)
113 break;
114 }
115 if (msleep_interruptible(334))
116 return -EINTR;
117 }
118 return error;
119}
120
121static struct csr1212_bus_ops nodemgr_csr_ops = {
122 .bus_read = nodemgr_bus_read,
123};
124
125
126/*
127 * Basically what we do here is start off retrieving the bus_info block.
128 * From there will fill in some info about the node, verify it is of IEEE
129 * 1394 type, and that the crc checks out ok. After that we start off with
130 * the root directory, and subdirectories. To do this, we retrieve the
131 * quadlet header for a directory, find out the length, and retrieve the
132 * complete directory entry (be it a leaf or a directory). We then process
133 * it and add the info to our structure for that particular node.
134 *
135 * We verify CRC's along the way for each directory/block/leaf. The entire
136 * node structure is generic, and simply stores the information in a way
137 * that's easy to parse by the protocol interface.
138 */
139
140/*
141 * The nodemgr relies heavily on the Driver Model for device callbacks and
142 * driver/device mappings. The old nodemgr used to handle all this itself,
143 * but now we are much simpler because of the LDM.
144 */
145
146struct host_info {
147 struct hpsb_host *host;
148 struct list_head list;
149 struct task_struct *thread;
150};
151
152static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
153static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
154
155struct bus_type ieee1394_bus_type = {
156 .name = "ieee1394",
157 .match = nodemgr_bus_match,
158};
159
160static void host_cls_release(struct device *dev)
161{
162 put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
163}
164
165struct class hpsb_host_class = {
166 .name = "ieee1394_host",
167 .dev_release = host_cls_release,
168};
169
170static void ne_cls_release(struct device *dev)
171{
172 put_device(&container_of((dev), struct node_entry, node_dev)->device);
173}
174
175static struct class nodemgr_ne_class = {
176 .name = "ieee1394_node",
177 .dev_release = ne_cls_release,
178};
179
180static void ud_cls_release(struct device *dev)
181{
182 put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
183}
184
185/* The name here is only so that unit directory hotplug works with old
186 * style hotplug, which only ever did unit directories anyway.
187 */
188static struct class nodemgr_ud_class = {
189 .name = "ieee1394",
190 .dev_release = ud_cls_release,
191 .dev_uevent = nodemgr_uevent,
192};
193
194static struct hpsb_highlevel nodemgr_highlevel;
195
196
197static void nodemgr_release_ud(struct device *dev)
198{
199 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
200
201 if (ud->vendor_name_kv)
202 csr1212_release_keyval(ud->vendor_name_kv);
203 if (ud->model_name_kv)
204 csr1212_release_keyval(ud->model_name_kv);
205
206 kfree(ud);
207}
208
209static void nodemgr_release_ne(struct device *dev)
210{
211 struct node_entry *ne = container_of(dev, struct node_entry, device);
212
213 if (ne->vendor_name_kv)
214 csr1212_release_keyval(ne->vendor_name_kv);
215
216 kfree(ne);
217}
218
219
220static void nodemgr_release_host(struct device *dev)
221{
222 struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
223
224 csr1212_destroy_csr(host->csr.rom);
225
226 kfree(host);
227}
228
229static int nodemgr_ud_platform_data;
230
231static struct device nodemgr_dev_template_ud = {
232 .bus = &ieee1394_bus_type,
233 .release = nodemgr_release_ud,
234 .platform_data = &nodemgr_ud_platform_data,
235};
236
237static struct device nodemgr_dev_template_ne = {
238 .bus = &ieee1394_bus_type,
239 .release = nodemgr_release_ne,
240};
241
242/* This dummy driver prevents the host devices from being scanned. We have no
243 * useful drivers for them yet, and there would be a deadlock possible if the
244 * driver core scans the host device while the host's low-level driver (i.e.
245 * the host's parent device) is being removed. */
246static struct device_driver nodemgr_mid_layer_driver = {
247 .bus = &ieee1394_bus_type,
248 .name = "nodemgr",
249 .owner = THIS_MODULE,
250};
251
252struct device nodemgr_dev_template_host = {
253 .bus = &ieee1394_bus_type,
254 .release = nodemgr_release_host,
255};
256
257
258#define fw_attr(class, class_type, field, type, format_string) \
259static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
260{ \
261 class_type *class; \
262 class = container_of(dev, class_type, device); \
263 return sprintf(buf, format_string, (type)class->field); \
264} \
265static struct device_attribute dev_attr_##class##_##field = { \
266 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
267 .show = fw_show_##class##_##field, \
268};
269
270#define fw_attr_td(class, class_type, td_kv) \
271static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
272{ \
273 int len; \
274 class_type *class = container_of(dev, class_type, device); \
275 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
276 memcpy(buf, \
277 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
278 len); \
279 while (buf[len - 1] == '\0') \
280 len--; \
281 buf[len++] = '\n'; \
282 buf[len] = '\0'; \
283 return len; \
284} \
285static struct device_attribute dev_attr_##class##_##td_kv = { \
286 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
287 .show = fw_show_##class##_##td_kv, \
288};
289
290
291#define fw_drv_attr(field, type, format_string) \
292static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
293{ \
294 struct hpsb_protocol_driver *driver; \
295 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
296 return sprintf(buf, format_string, (type)driver->field);\
297} \
298static struct driver_attribute driver_attr_drv_##field = { \
299 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
300 .show = fw_drv_show_##field, \
301};
302
303
304static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
305{
306 struct node_entry *ne = container_of(dev, struct node_entry, device);
307
308 return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
309 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
310 ne->busopt.irmc,
311 ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
312 ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
313 ne->busopt.max_rec,
314 ne->busopt.max_rom,
315 ne->busopt.cyc_clk_acc);
316}
317static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
318
319
320#ifdef HPSB_DEBUG_TLABELS
321static ssize_t fw_show_ne_tlabels_free(struct device *dev,
322 struct device_attribute *attr, char *buf)
323{
324 struct node_entry *ne = container_of(dev, struct node_entry, device);
325 unsigned long flags;
326 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
327 int tf;
328
329 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
330 tf = 64 - bitmap_weight(tp, 64);
331 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
332
333 return sprintf(buf, "%d\n", tf);
334}
335static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
336
337
338static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
339 struct device_attribute *attr, char *buf)
340{
341 struct node_entry *ne = container_of(dev, struct node_entry, device);
342 unsigned long flags;
343 unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
344 u64 tm;
345
346 spin_lock_irqsave(&hpsb_tlabel_lock, flags);
347#if (BITS_PER_LONG <= 32)
348 tm = ((u64)tp[0] << 32) + tp[1];
349#else
350 tm = tp[0];
351#endif
352 spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
353
354 return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
355}
356static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
357#endif /* HPSB_DEBUG_TLABELS */
358
359
360static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
361{
362 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
363 int state = simple_strtoul(buf, NULL, 10);
364
365 if (state == 1) {
366 ud->ignore_driver = 1;
367 device_release_driver(dev);
368 } else if (state == 0)
369 ud->ignore_driver = 0;
370
371 return count;
372}
373static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
374{
375 struct unit_directory *ud = container_of(dev, struct unit_directory, device);
376
377 return sprintf(buf, "%d\n", ud->ignore_driver);
378}
379static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
380
381
382static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
383 size_t count)
384{
385 int error = 0;
386
387 if (simple_strtoul(buf, NULL, 10) == 1)
388 error = bus_rescan_devices(&ieee1394_bus_type);
389 return error ? error : count;
390}
391static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
392{
393 return sprintf(buf, "You can force a rescan of the bus for "
394 "drivers by writing a 1 to this file\n");
395}
396static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
397
398
399static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
400{
401 int state = simple_strtoul(buf, NULL, 10);
402
403 if (state == 1)
404 ignore_drivers = 1;
405 else if (state == 0)
406 ignore_drivers = 0;
407
408 return count;
409}
410static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
411{
412 return sprintf(buf, "%d\n", ignore_drivers);
413}
414static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
415
416
417struct bus_attribute *const fw_bus_attrs[] = {
418 &bus_attr_rescan,
419 &bus_attr_ignore_drivers,
420 NULL
421};
422
423
424fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
425fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
426
427fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
428fw_attr_td(ne, struct node_entry, vendor_name_kv)
429
430fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
431fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
432fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
433
434static struct device_attribute *const fw_ne_attrs[] = {
435 &dev_attr_ne_guid,
436 &dev_attr_ne_guid_vendor_id,
437 &dev_attr_ne_capabilities,
438 &dev_attr_ne_vendor_id,
439 &dev_attr_ne_nodeid,
440 &dev_attr_bus_options,
441#ifdef HPSB_DEBUG_TLABELS
442 &dev_attr_tlabels_free,
443 &dev_attr_tlabels_mask,
444#endif
445};
446
447
448
449fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
450fw_attr(ud, struct unit_directory, length, int, "%d\n")
451/* These are all dependent on the value being provided */
452fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
453fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
454fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
455fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
456fw_attr_td(ud, struct unit_directory, vendor_name_kv)
457fw_attr_td(ud, struct unit_directory, model_name_kv)
458
459static struct device_attribute *const fw_ud_attrs[] = {
460 &dev_attr_ud_address,
461 &dev_attr_ud_length,
462 &dev_attr_ignore_driver,
463};
464
465
466fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
467fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
468fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
469fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
470fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
471fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
472fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
473fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
474
475static struct device_attribute *const fw_host_attrs[] = {
476 &dev_attr_host_node_count,
477 &dev_attr_host_selfid_count,
478 &dev_attr_host_nodes_active,
479 &dev_attr_host_in_bus_reset,
480 &dev_attr_host_is_root,
481 &dev_attr_host_is_cycmst,
482 &dev_attr_host_is_irm,
483 &dev_attr_host_is_busmgr,
484};
485
486
487static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
488{
489 struct hpsb_protocol_driver *driver;
490 const struct ieee1394_device_id *id;
491 int length = 0;
492 char *scratch = buf;
493
494 driver = container_of(drv, struct hpsb_protocol_driver, driver);
495 id = driver->id_table;
496 if (!id)
497 return 0;
498
499 for (; id->match_flags != 0; id++) {
500 int need_coma = 0;
501
502 if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
503 length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
504 scratch = buf + length;
505 need_coma++;
506 }
507
508 if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
509 length += sprintf(scratch, "%smodel_id=0x%06x",
510 need_coma++ ? "," : "",
511 id->model_id);
512 scratch = buf + length;
513 }
514
515 if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
516 length += sprintf(scratch, "%sspecifier_id=0x%06x",
517 need_coma++ ? "," : "",
518 id->specifier_id);
519 scratch = buf + length;
520 }
521
522 if (id->match_flags & IEEE1394_MATCH_VERSION) {
523 length += sprintf(scratch, "%sversion=0x%06x",
524 need_coma++ ? "," : "",
525 id->version);
526 scratch = buf + length;
527 }
528
529 if (need_coma) {
530 *scratch++ = '\n';
531 length++;
532 }
533 }
534
535 return length;
536}
537static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
538
539
540fw_drv_attr(name, const char *, "%s\n")
541
542static struct driver_attribute *const fw_drv_attrs[] = {
543 &driver_attr_drv_name,
544 &driver_attr_device_ids,
545};
546
547
548static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
549{
550 struct device_driver *drv = &driver->driver;
551 int i;
552
553 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
554 if (driver_create_file(drv, fw_drv_attrs[i]))
555 goto fail;
556 return;
557fail:
558 HPSB_ERR("Failed to add sysfs attribute");
559}
560
561
562static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
563{
564 struct device_driver *drv = &driver->driver;
565 int i;
566
567 for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
568 driver_remove_file(drv, fw_drv_attrs[i]);
569}
570
571
572static void nodemgr_create_ne_dev_files(struct node_entry *ne)
573{
574 struct device *dev = &ne->device;
575 int i;
576
577 for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
578 if (device_create_file(dev, fw_ne_attrs[i]))
579 goto fail;
580 return;
581fail:
582 HPSB_ERR("Failed to add sysfs attribute");
583}
584
585
586static void nodemgr_create_host_dev_files(struct hpsb_host *host)
587{
588 struct device *dev = &host->device;
589 int i;
590
591 for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
592 if (device_create_file(dev, fw_host_attrs[i]))
593 goto fail;
594 return;
595fail:
596 HPSB_ERR("Failed to add sysfs attribute");
597}
598
599
600static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
601 nodeid_t nodeid);
602
603static void nodemgr_update_host_dev_links(struct hpsb_host *host)
604{
605 struct device *dev = &host->device;
606 struct node_entry *ne;
607
608 sysfs_remove_link(&dev->kobj, "irm_id");
609 sysfs_remove_link(&dev->kobj, "busmgr_id");
610 sysfs_remove_link(&dev->kobj, "host_id");
611
612 if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
613 sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
614 goto fail;
615 if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
616 sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
617 goto fail;
618 if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
619 sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
620 goto fail;
621 return;
622fail:
623 HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
624}
625
626static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
627{
628 struct device *dev = &ud->device;
629 int i;
630
631 for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
632 if (device_create_file(dev, fw_ud_attrs[i]))
633 goto fail;
634 if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
635 if (device_create_file(dev, &dev_attr_ud_specifier_id))
636 goto fail;
637 if (ud->flags & UNIT_DIRECTORY_VERSION)
638 if (device_create_file(dev, &dev_attr_ud_version))
639 goto fail;
640 if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
641 if (device_create_file(dev, &dev_attr_ud_vendor_id))
642 goto fail;
643 if (ud->vendor_name_kv &&
644 device_create_file(dev, &dev_attr_ud_vendor_name_kv))
645 goto fail;
646 }
647 if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
648 if (device_create_file(dev, &dev_attr_ud_model_id))
649 goto fail;
650 if (ud->model_name_kv &&
651 device_create_file(dev, &dev_attr_ud_model_name_kv))
652 goto fail;
653 }
654 return;
655fail:
656 HPSB_ERR("Failed to add sysfs attribute");
657}
658
659
660static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
661{
662 struct hpsb_protocol_driver *driver;
663 struct unit_directory *ud;
664 const struct ieee1394_device_id *id;
665
666 /* We only match unit directories */
667 if (dev->platform_data != &nodemgr_ud_platform_data)
668 return 0;
669
670 ud = container_of(dev, struct unit_directory, device);
671 if (ud->ne->in_limbo || ud->ignore_driver)
672 return 0;
673
674 /* We only match drivers of type hpsb_protocol_driver */
675 if (drv == &nodemgr_mid_layer_driver)
676 return 0;
677
678 driver = container_of(drv, struct hpsb_protocol_driver, driver);
679 id = driver->id_table;
680 if (!id)
681 return 0;
682
683 for (; id->match_flags != 0; id++) {
684 if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
685 id->vendor_id != ud->vendor_id)
686 continue;
687
688 if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
689 id->model_id != ud->model_id)
690 continue;
691
692 if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
693 id->specifier_id != ud->specifier_id)
694 continue;
695
696 if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
697 id->version != ud->version)
698 continue;
699
700 return 1;
701 }
702
703 return 0;
704}
705
706
707static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
708
709static int match_ne(struct device *dev, void *data)
710{
711 struct unit_directory *ud;
712 struct node_entry *ne = data;
713
714 ud = container_of(dev, struct unit_directory, unit_dev);
715 return ud->ne == ne;
716}
717
718static void nodemgr_remove_uds(struct node_entry *ne)
719{
720 struct device *dev;
721 struct unit_directory *ud;
722
723 /* Use class_find device to iterate the devices. Since this code
724 * may be called from other contexts besides the knodemgrds,
725 * protect it by nodemgr_serialize_remove_uds.
726 */
727 mutex_lock(&nodemgr_serialize_remove_uds);
728 for (;;) {
729 dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
730 if (!dev)
731 break;
732 ud = container_of(dev, struct unit_directory, unit_dev);
733 put_device(dev);
734 device_unregister(&ud->unit_dev);
735 device_unregister(&ud->device);
736 }
737 mutex_unlock(&nodemgr_serialize_remove_uds);
738}
739
740
741static void nodemgr_remove_ne(struct node_entry *ne)
742{
743 struct device *dev;
744
745 dev = get_device(&ne->device);
746 if (!dev)
747 return;
748
749 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
750 NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
751 nodemgr_remove_uds(ne);
752
753 device_unregister(&ne->node_dev);
754 device_unregister(dev);
755
756 put_device(dev);
757}
758
759static int remove_host_dev(struct device *dev, void *data)
760{
761 if (dev->bus == &ieee1394_bus_type)
762 nodemgr_remove_ne(container_of(dev, struct node_entry,
763 device));
764 return 0;
765}
766
767static void nodemgr_remove_host_dev(struct device *dev)
768{
769 device_for_each_child(dev, NULL, remove_host_dev);
770 sysfs_remove_link(&dev->kobj, "irm_id");
771 sysfs_remove_link(&dev->kobj, "busmgr_id");
772 sysfs_remove_link(&dev->kobj, "host_id");
773}
774
775
776static void nodemgr_update_bus_options(struct node_entry *ne)
777{
778#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
779 static const u16 mr[] = { 4, 64, 1024, 0};
780#endif
781 quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
782
783 ne->busopt.irmc = (busoptions >> 31) & 1;
784 ne->busopt.cmc = (busoptions >> 30) & 1;
785 ne->busopt.isc = (busoptions >> 29) & 1;
786 ne->busopt.bmc = (busoptions >> 28) & 1;
787 ne->busopt.pmc = (busoptions >> 27) & 1;
788 ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
789 ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
790 ne->busopt.max_rom = (busoptions >> 8) & 0x3;
791 ne->busopt.generation = (busoptions >> 4) & 0xf;
792 ne->busopt.lnkspd = busoptions & 0x7;
793
794 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
795 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
796 busoptions, ne->busopt.irmc, ne->busopt.cmc,
797 ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
798 ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
799 mr[ne->busopt.max_rom],
800 ne->busopt.generation, ne->busopt.lnkspd);
801}
802
803
804static struct node_entry *nodemgr_create_node(octlet_t guid,
805 struct csr1212_csr *csr, struct hpsb_host *host,
806 nodeid_t nodeid, unsigned int generation)
807{
808 struct node_entry *ne;
809
810 ne = kzalloc(sizeof(*ne), GFP_KERNEL);
811 if (!ne)
812 goto fail_alloc;
813
814 ne->host = host;
815 ne->nodeid = nodeid;
816 ne->generation = generation;
817 ne->needs_probe = true;
818
819 ne->guid = guid;
820 ne->guid_vendor_id = (guid >> 40) & 0xffffff;
821 ne->csr = csr;
822
823 memcpy(&ne->device, &nodemgr_dev_template_ne,
824 sizeof(ne->device));
825 ne->device.parent = &host->device;
826 dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
827
828 ne->node_dev.parent = &ne->device;
829 ne->node_dev.class = &nodemgr_ne_class;
830 dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
831
832 if (device_register(&ne->device))
833 goto fail_devreg;
834 if (device_register(&ne->node_dev))
835 goto fail_classdevreg;
836 get_device(&ne->device);
837
838 nodemgr_create_ne_dev_files(ne);
839
840 nodemgr_update_bus_options(ne);
841
842 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
843 (host->node_id == nodeid) ? "Host" : "Node",
844 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
845
846 return ne;
847
848fail_classdevreg:
849 device_unregister(&ne->device);
850fail_devreg:
851 kfree(ne);
852fail_alloc:
853 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
854 NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
855
856 return NULL;
857}
858
859static int match_ne_guid(struct device *dev, void *data)
860{
861 struct node_entry *ne;
862 u64 *guid = data;
863
864 ne = container_of(dev, struct node_entry, node_dev);
865 return ne->guid == *guid;
866}
867
868static struct node_entry *find_entry_by_guid(u64 guid)
869{
870 struct device *dev;
871 struct node_entry *ne;
872
873 dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
874 if (!dev)
875 return NULL;
876 ne = container_of(dev, struct node_entry, node_dev);
877 put_device(dev);
878
879 return ne;
880}
881
882struct match_nodeid_parameter {
883 struct hpsb_host *host;
884 nodeid_t nodeid;
885};
886
887static int match_ne_nodeid(struct device *dev, void *data)
888{
889 int found = 0;
890 struct node_entry *ne;
891 struct match_nodeid_parameter *p = data;
892
893 if (!dev)
894 goto ret;
895 ne = container_of(dev, struct node_entry, node_dev);
896 if (ne->host == p->host && ne->nodeid == p->nodeid)
897 found = 1;
898ret:
899 return found;
900}
901
902static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
903 nodeid_t nodeid)
904{
905 struct device *dev;
906 struct node_entry *ne;
907 struct match_nodeid_parameter p;
908
909 p.host = host;
910 p.nodeid = nodeid;
911
912 dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
913 if (!dev)
914 return NULL;
915 ne = container_of(dev, struct node_entry, node_dev);
916 put_device(dev);
917
918 return ne;
919}
920
921
922static void nodemgr_register_device(struct node_entry *ne,
923 struct unit_directory *ud, struct device *parent)
924{
925 memcpy(&ud->device, &nodemgr_dev_template_ud,
926 sizeof(ud->device));
927
928 ud->device.parent = parent;
929
930 dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
931
932 ud->unit_dev.parent = &ud->device;
933 ud->unit_dev.class = &nodemgr_ud_class;
934 dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
935
936 if (device_register(&ud->device))
937 goto fail_devreg;
938 if (device_register(&ud->unit_dev))
939 goto fail_classdevreg;
940 get_device(&ud->device);
941
942 nodemgr_create_ud_dev_files(ud);
943
944 return;
945
946fail_classdevreg:
947 device_unregister(&ud->device);
948fail_devreg:
949 HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
950}
951
952
953/* This implementation currently only scans the config rom and its
954 * immediate unit directories looking for software_id and
955 * software_version entries, in order to get driver autoloading working. */
956static struct unit_directory *nodemgr_process_unit_directory
957 (struct node_entry *ne, struct csr1212_keyval *ud_kv,
958 unsigned int *id, struct unit_directory *parent)
959{
960 struct unit_directory *ud;
961 struct unit_directory *ud_child = NULL;
962 struct csr1212_dentry *dentry;
963 struct csr1212_keyval *kv;
964 u8 last_key_id = 0;
965
966 ud = kzalloc(sizeof(*ud), GFP_KERNEL);
967 if (!ud)
968 goto unit_directory_error;
969
970 ud->ne = ne;
971 ud->ignore_driver = ignore_drivers;
972 ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
973 ud->directory_id = ud->address & 0xffffff;
974 ud->ud_kv = ud_kv;
975 ud->id = (*id)++;
976
977 /* inherit vendor_id from root directory if none exists in unit dir */
978 ud->vendor_id = ne->vendor_id;
979
980 csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
981 switch (kv->key.id) {
982 case CSR1212_KV_ID_VENDOR:
983 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
984 ud->vendor_id = kv->value.immediate;
985 ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
986 }
987 break;
988
989 case CSR1212_KV_ID_MODEL:
990 ud->model_id = kv->value.immediate;
991 ud->flags |= UNIT_DIRECTORY_MODEL_ID;
992 break;
993
994 case CSR1212_KV_ID_SPECIFIER_ID:
995 ud->specifier_id = kv->value.immediate;
996 ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
997 break;
998
999 case CSR1212_KV_ID_VERSION:
1000 ud->version = kv->value.immediate;
1001 ud->flags |= UNIT_DIRECTORY_VERSION;
1002 break;
1003
1004 case CSR1212_KV_ID_DESCRIPTOR:
1005 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1006 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1007 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1008 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1009 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1010 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1011 switch (last_key_id) {
1012 case CSR1212_KV_ID_VENDOR:
1013 csr1212_keep_keyval(kv);
1014 ud->vendor_name_kv = kv;
1015 break;
1016
1017 case CSR1212_KV_ID_MODEL:
1018 csr1212_keep_keyval(kv);
1019 ud->model_name_kv = kv;
1020 break;
1021
1022 }
1023 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1024 break;
1025
1026 case CSR1212_KV_ID_DEPENDENT_INFO:
1027 /* Logical Unit Number */
1028 if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1029 if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
1030 ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
1031 if (!ud_child)
1032 goto unit_directory_error;
1033 nodemgr_register_device(ne, ud_child, &ne->device);
1034 ud_child = NULL;
1035
1036 ud->id = (*id)++;
1037 }
1038 ud->lun = kv->value.immediate;
1039 ud->flags |= UNIT_DIRECTORY_HAS_LUN;
1040
1041 /* Logical Unit Directory */
1042 } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
1043 /* This should really be done in SBP2 as this is
1044 * doing SBP2 specific parsing.
1045 */
1046
1047 /* first register the parent unit */
1048 ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
1049 if (ud->device.bus != &ieee1394_bus_type)
1050 nodemgr_register_device(ne, ud, &ne->device);
1051
1052 /* process the child unit */
1053 ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
1054
1055 if (ud_child == NULL)
1056 break;
1057
1058 /* inherit unspecified values, the driver core picks it up */
1059 if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
1060 !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
1061 {
1062 ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
1063 ud_child->model_id = ud->model_id;
1064 }
1065 if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
1066 !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
1067 {
1068 ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
1069 ud_child->specifier_id = ud->specifier_id;
1070 }
1071 if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
1072 !(ud_child->flags & UNIT_DIRECTORY_VERSION))
1073 {
1074 ud_child->flags |= UNIT_DIRECTORY_VERSION;
1075 ud_child->version = ud->version;
1076 }
1077
1078 /* register the child unit */
1079 ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
1080 nodemgr_register_device(ne, ud_child, &ud->device);
1081 }
1082
1083 break;
1084
1085 case CSR1212_KV_ID_DIRECTORY_ID:
1086 ud->directory_id = kv->value.immediate;
1087 break;
1088
1089 default:
1090 break;
1091 }
1092 last_key_id = kv->key.id;
1093 }
1094
1095 /* do not process child units here and only if not already registered */
1096 if (!parent && ud->device.bus != &ieee1394_bus_type)
1097 nodemgr_register_device(ne, ud, &ne->device);
1098
1099 return ud;
1100
1101unit_directory_error:
1102 kfree(ud);
1103 return NULL;
1104}
1105
1106
1107static void nodemgr_process_root_directory(struct node_entry *ne)
1108{
1109 unsigned int ud_id = 0;
1110 struct csr1212_dentry *dentry;
1111 struct csr1212_keyval *kv, *vendor_name_kv = NULL;
1112 u8 last_key_id = 0;
1113
1114 ne->needs_probe = false;
1115
1116 csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
1117 switch (kv->key.id) {
1118 case CSR1212_KV_ID_VENDOR:
1119 ne->vendor_id = kv->value.immediate;
1120 break;
1121
1122 case CSR1212_KV_ID_NODE_CAPABILITIES:
1123 ne->capabilities = kv->value.immediate;
1124 break;
1125
1126 case CSR1212_KV_ID_UNIT:
1127 nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
1128 break;
1129
1130 case CSR1212_KV_ID_DESCRIPTOR:
1131 if (last_key_id == CSR1212_KV_ID_VENDOR) {
1132 if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
1133 CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
1134 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
1135 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
1136 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
1137 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
1138 csr1212_keep_keyval(kv);
1139 vendor_name_kv = kv;
1140 }
1141 }
1142 break;
1143 }
1144 last_key_id = kv->key.id;
1145 }
1146
1147 if (ne->vendor_name_kv) {
1148 kv = ne->vendor_name_kv;
1149 ne->vendor_name_kv = vendor_name_kv;
1150 csr1212_release_keyval(kv);
1151 } else if (vendor_name_kv) {
1152 ne->vendor_name_kv = vendor_name_kv;
1153 if (device_create_file(&ne->device,
1154 &dev_attr_ne_vendor_name_kv) != 0)
1155 HPSB_ERR("Failed to add sysfs attribute");
1156 }
1157}
1158
1159#ifdef CONFIG_HOTPLUG
1160
1161static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1162{
1163 struct unit_directory *ud;
1164 int retval = 0;
1165 /* ieee1394:venNmoNspNverN */
1166 char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1167
1168 if (!dev)
1169 return -ENODEV;
1170
1171 ud = container_of(dev, struct unit_directory, unit_dev);
1172
1173 if (ud->ne->in_limbo || ud->ignore_driver)
1174 return -ENODEV;
1175
1176#define PUT_ENVP(fmt,val) \
1177do { \
1178 retval = add_uevent_var(env, fmt, val); \
1179 if (retval) \
1180 return retval; \
1181} while (0)
1182
1183 PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
1184 PUT_ENVP("MODEL_ID=%06x", ud->model_id);
1185 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
1186 PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
1187 PUT_ENVP("VERSION=%06x", ud->version);
1188 snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1189 ud->vendor_id,
1190 ud->model_id,
1191 ud->specifier_id,
1192 ud->version);
1193 PUT_ENVP("MODALIAS=%s", buf);
1194
1195#undef PUT_ENVP
1196
1197 return 0;
1198}
1199
1200#else
1201
1202static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
1203{
1204 return -ENODEV;
1205}
1206
1207#endif /* CONFIG_HOTPLUG */
1208
1209
1210int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
1211 struct module *owner)
1212{
1213 int error;
1214
1215 drv->driver.bus = &ieee1394_bus_type;
1216 drv->driver.owner = owner;
1217 drv->driver.name = drv->name;
1218
1219 /* This will cause a probe for devices */
1220 error = driver_register(&drv->driver);
1221 if (!error)
1222 nodemgr_create_drv_files(drv);
1223 return error;
1224}
1225
1226void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
1227{
1228 nodemgr_remove_drv_files(driver);
1229 /* This will subsequently disconnect all devices that our driver
1230 * is attached to. */
1231 driver_unregister(&driver->driver);
1232}
1233
1234
1235/*
1236 * This function updates nodes that were present on the bus before the
1237 * reset and still are after the reset. The nodeid and the config rom
1238 * may have changed, and the drivers managing this device must be
1239 * informed that this device just went through a bus reset, to allow
1240 * the to take whatever actions required.
1241 */
1242static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
1243 nodeid_t nodeid, unsigned int generation)
1244{
1245 if (ne->nodeid != nodeid) {
1246 HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
1247 NODE_BUS_ARGS(ne->host, ne->nodeid),
1248 NODE_BUS_ARGS(ne->host, nodeid));
1249 ne->nodeid = nodeid;
1250 }
1251
1252 if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
1253 kfree(ne->csr->private);
1254 csr1212_destroy_csr(ne->csr);
1255 ne->csr = csr;
1256
1257 /* If the node's configrom generation has changed, we
1258 * unregister all the unit directories. */
1259 nodemgr_remove_uds(ne);
1260
1261 nodemgr_update_bus_options(ne);
1262
1263 /* Mark the node as new, so it gets re-probed */
1264 ne->needs_probe = true;
1265 } else {
1266 /* old cache is valid, so update its generation */
1267 struct nodemgr_csr_info *ci = ne->csr->private;
1268 ci->generation = generation;
1269 /* free the partially filled now unneeded new cache */
1270 kfree(csr->private);
1271 csr1212_destroy_csr(csr);
1272 }
1273
1274 /* Finally, mark the node current */
1275 smp_wmb();
1276 ne->generation = generation;
1277
1278 if (ne->in_limbo) {
1279 device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
1280 ne->in_limbo = false;
1281
1282 HPSB_DEBUG("Node reactivated: "
1283 "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1284 NODE_BUS_ARGS(ne->host, ne->nodeid),
1285 (unsigned long long)ne->guid);
1286 }
1287}
1288
1289static void nodemgr_node_scan_one(struct hpsb_host *host,
1290 nodeid_t nodeid, int generation)
1291{
1292 struct node_entry *ne;
1293 octlet_t guid;
1294 struct csr1212_csr *csr;
1295 struct nodemgr_csr_info *ci;
1296 u8 *speed;
1297
1298 ci = kmalloc(sizeof(*ci), GFP_KERNEL);
1299 kmemcheck_annotate_bitfield(ci, flags);
1300 if (!ci)
1301 return;
1302
1303 ci->host = host;
1304 ci->nodeid = nodeid;
1305 ci->generation = generation;
1306
1307 /* Prepare for speed probe which occurs when reading the ROM */
1308 speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
1309 if (*speed > host->csr.lnk_spd)
1310 *speed = host->csr.lnk_spd;
1311 ci->speed_unverified = *speed > IEEE1394_SPEED_100;
1312
1313 /* We need to detect when the ConfigROM's generation has changed,
1314 * so we only update the node's info when it needs to be. */
1315
1316 csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
1317 if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
1318 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
1319 NODE_BUS_ARGS(host, nodeid));
1320 if (csr)
1321 csr1212_destroy_csr(csr);
1322 kfree(ci);
1323 return;
1324 }
1325
1326 if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
1327 /* This isn't a 1394 device, but we let it slide. There
1328 * was a report of a device with broken firmware which
1329 * reported '2394' instead of '1394', which is obviously a
1330 * mistake. One would hope that a non-1394 device never
1331 * gets connected to Firewire bus. If someone does, we
1332 * shouldn't be held responsible, so we'll allow it with a
1333 * warning. */
1334 HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
1335 NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
1336 }
1337
1338 guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
1339 ne = find_entry_by_guid(guid);
1340
1341 if (ne && ne->host != host && ne->in_limbo) {
1342 /* Must have moved this device from one host to another */
1343 nodemgr_remove_ne(ne);
1344 ne = NULL;
1345 }
1346
1347 if (!ne)
1348 nodemgr_create_node(guid, csr, host, nodeid, generation);
1349 else
1350 nodemgr_update_node(ne, csr, nodeid, generation);
1351}
1352
1353
1354static void nodemgr_node_scan(struct hpsb_host *host, int generation)
1355{
1356 int count;
1357 struct selfid *sid = (struct selfid *)host->topology_map;
1358 nodeid_t nodeid = LOCAL_BUS;
1359
1360 /* Scan each node on the bus */
1361 for (count = host->selfid_count; count; count--, sid++) {
1362 if (sid->extended)
1363 continue;
1364
1365 if (!sid->link_active) {
1366 nodeid++;
1367 continue;
1368 }
1369 nodemgr_node_scan_one(host, nodeid++, generation);
1370 }
1371}
1372
1373static void nodemgr_pause_ne(struct node_entry *ne)
1374{
1375 HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
1376 NODE_BUS_ARGS(ne->host, ne->nodeid),
1377 (unsigned long long)ne->guid);
1378
1379 ne->in_limbo = true;
1380 WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
1381}
1382
1383static int update_pdrv(struct device *dev, void *data)
1384{
1385 struct unit_directory *ud;
1386 struct device_driver *drv;
1387 struct hpsb_protocol_driver *pdrv;
1388 struct node_entry *ne = data;
1389 int error;
1390
1391 ud = container_of(dev, struct unit_directory, unit_dev);
1392 if (ud->ne == ne) {
1393 drv = get_driver(ud->device.driver);
1394 if (drv) {
1395 error = 0;
1396 pdrv = container_of(drv, struct hpsb_protocol_driver,
1397 driver);
1398 if (pdrv->update) {
1399 device_lock(&ud->device);
1400 error = pdrv->update(ud);
1401 device_unlock(&ud->device);
1402 }
1403 if (error)
1404 device_release_driver(&ud->device);
1405 put_driver(drv);
1406 }
1407 }
1408
1409 return 0;
1410}
1411
1412static void nodemgr_update_pdrv(struct node_entry *ne)
1413{
1414 class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
1415}
1416
1417/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1418 * seems like an optional service but in the end it is practically mandatory
1419 * as a consequence of these clauses.
1420 *
1421 * Note that we cannot do a broadcast write to all nodes at once because some
1422 * pre-1394a devices would hang. */
1423static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
1424{
1425 const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
1426 quadlet_t bc_remote, bc_local;
1427 int error;
1428
1429 if (!ne->host->is_irm || ne->generation != generation ||
1430 ne->nodeid == ne->host->node_id)
1431 return;
1432
1433 bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
1434
1435 /* Check if the register is implemented and 1394a compliant. */
1436 error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
1437 sizeof(bc_remote));
1438 if (!error && bc_remote & cpu_to_be32(0x80000000) &&
1439 bc_remote != bc_local)
1440 hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
1441}
1442
1443
1444static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
1445 int generation)
1446{
1447 struct device *dev;
1448
1449 if (ne->host != host || ne->in_limbo)
1450 return;
1451
1452 dev = get_device(&ne->device);
1453 if (!dev)
1454 return;
1455
1456 nodemgr_irm_write_bc(ne, generation);
1457
1458 /* If "needs_probe", then this is either a new or changed node we
1459 * rescan totally. If the generation matches for an existing node
1460 * (one that existed prior to the bus reset) we send update calls
1461 * down to the drivers. Otherwise, this is a dead node and we
1462 * suspend it. */
1463 if (ne->needs_probe)
1464 nodemgr_process_root_directory(ne);
1465 else if (ne->generation == generation)
1466 nodemgr_update_pdrv(ne);
1467 else
1468 nodemgr_pause_ne(ne);
1469
1470 put_device(dev);
1471}
1472
1473struct node_probe_parameter {
1474 struct hpsb_host *host;
1475 int generation;
1476 bool probe_now;
1477};
1478
1479static int node_probe(struct device *dev, void *data)
1480{
1481 struct node_probe_parameter *p = data;
1482 struct node_entry *ne;
1483
1484 if (p->generation != get_hpsb_generation(p->host))
1485 return -EAGAIN;
1486
1487 ne = container_of(dev, struct node_entry, node_dev);
1488 if (ne->needs_probe == p->probe_now)
1489 nodemgr_probe_ne(p->host, ne, p->generation);
1490 return 0;
1491}
1492
1493static int nodemgr_node_probe(struct hpsb_host *host, int generation)
1494{
1495 struct node_probe_parameter p;
1496
1497 p.host = host;
1498 p.generation = generation;
1499 /*
1500 * Do some processing of the nodes we've probed. This pulls them
1501 * into the sysfs layer if needed, and can result in processing of
1502 * unit-directories, or just updating the node and it's
1503 * unit-directories.
1504 *
1505 * Run updates before probes. Usually, updates are time-critical
1506 * while probes are time-consuming.
1507 *
1508 * Meanwhile, another bus reset may have happened. In this case we
1509 * skip everything here and let the next bus scan handle it.
1510 * Otherwise we may prematurely remove nodes which are still there.
1511 */
1512 p.probe_now = false;
1513 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1514 return 0;
1515
1516 p.probe_now = true;
1517 if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
1518 return 0;
1519 /*
1520 * Now let's tell the bus to rescan our devices. This may seem
1521 * like overhead, but the driver-model core will only scan a
1522 * device for a driver when either the device is added, or when a
1523 * new driver is added. A bus reset is a good reason to rescan
1524 * devices that were there before. For example, an sbp2 device
1525 * may become available for login, if the host that held it was
1526 * just removed.
1527 */
1528 if (bus_rescan_devices(&ieee1394_bus_type) != 0)
1529 HPSB_DEBUG("bus_rescan_devices had an error");
1530
1531 return 1;
1532}
1533
1534static int remove_nodes_in_limbo(struct device *dev, void *data)
1535{
1536 struct node_entry *ne;
1537
1538 if (dev->bus != &ieee1394_bus_type)
1539 return 0;
1540
1541 ne = container_of(dev, struct node_entry, device);
1542 if (ne->in_limbo)
1543 nodemgr_remove_ne(ne);
1544
1545 return 0;
1546}
1547
1548static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
1549{
1550 device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
1551}
1552
1553static int nodemgr_send_resume_packet(struct hpsb_host *host)
1554{
1555 struct hpsb_packet *packet;
1556 int error = -ENOMEM;
1557
1558 packet = hpsb_make_phypacket(host,
1559 EXTPHYPACKET_TYPE_RESUME |
1560 NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
1561 if (packet) {
1562 packet->no_waiter = 1;
1563 packet->generation = get_hpsb_generation(host);
1564 error = hpsb_send_packet(packet);
1565 }
1566 if (error)
1567 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1568 host->id);
1569 return error;
1570}
1571
1572/* Perform a few high-level IRM responsibilities. */
1573static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1574{
1575 quadlet_t bc;
1576
1577 /* if irm_id == -1 then there is no IRM on this bus */
1578 if (!host->is_irm || host->irm_id == (nodeid_t)-1)
1579 return 1;
1580
1581 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1582 host->csr.broadcast_channel |= 0x40000000;
1583
1584 /* If there is no bus manager then we should set the root node's
1585 * force_root bit to promote bus stability per the 1394
1586 * spec. (8.4.2.6) */
1587 if (host->busmgr_id == 0xffff && host->node_count > 1)
1588 {
1589 u16 root_node = host->node_count - 1;
1590
1591 /* get cycle master capability flag from root node */
1592 if (host->is_cycmst ||
1593 (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
1594 (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
1595 &bc, sizeof(quadlet_t)) &&
1596 be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
1597 hpsb_send_phy_config(host, root_node, -1);
1598 else {
1599 HPSB_DEBUG("The root node is not cycle master capable; "
1600 "selecting a new root node and resetting...");
1601
1602 if (cycles >= 5) {
1603 /* Oh screw it! Just leave the bus as it is */
1604 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1605 return 1;
1606 }
1607
1608 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1609 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1610
1611 return 0;
1612 }
1613 }
1614
1615 /* Some devices suspend their ports while being connected to an inactive
1616 * host adapter, i.e. if connected before the low-level driver is
1617 * loaded. They become visible either when physically unplugged and
1618 * replugged, or when receiving a resume packet. Send one once. */
1619 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1620 host->resume_packet_sent = 1;
1621
1622 return 1;
1623}
1624
1625/* We need to ensure that if we are not the IRM, that the IRM node is capable of
1626 * everything we can do, otherwise issue a bus reset and try to become the IRM
1627 * ourselves. */
1628static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
1629{
1630 quadlet_t bc;
1631 int status;
1632
1633 if (hpsb_disable_irm || host->is_irm)
1634 return 1;
1635
1636 status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
1637 get_hpsb_generation(host),
1638 (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
1639 &bc, sizeof(quadlet_t));
1640
1641 if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
1642 /* The current irm node does not have a valid BROADCAST_CHANNEL
1643 * register and we do, so reset the bus with force_root set */
1644 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1645
1646 if (cycles >= 5) {
1647 /* Oh screw it! Just leave the bus as it is */
1648 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1649 return 1;
1650 }
1651
1652 hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
1653 hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
1654
1655 return 0;
1656 }
1657
1658 return 1;
1659}
1660
1661static int nodemgr_host_thread(void *data)
1662{
1663 struct hpsb_host *host = data;
1664 unsigned int g, generation = 0;
1665 int i, reset_cycles = 0;
1666
1667 set_freezable();
1668 /* Setup our device-model entries */
1669 nodemgr_create_host_dev_files(host);
1670
1671 for (;;) {
1672 /* Sleep until next bus reset */
1673 set_current_state(TASK_INTERRUPTIBLE);
1674 if (get_hpsb_generation(host) == generation &&
1675 !kthread_should_stop())
1676 schedule();
1677 __set_current_state(TASK_RUNNING);
1678
1679 /* Thread may have been woken up to freeze or to exit */
1680 if (try_to_freeze())
1681 continue;
1682 if (kthread_should_stop())
1683 goto exit;
1684
1685 /* Pause for 1/4 second in 1/16 second intervals,
1686 * to make sure things settle down. */
1687 g = get_hpsb_generation(host);
1688 for (i = 0; i < 4 ; i++) {
1689 msleep_interruptible(63);
1690 try_to_freeze();
1691 if (kthread_should_stop())
1692 goto exit;
1693
1694 /* Now get the generation in which the node ID's we collect
1695 * are valid. During the bus scan we will use this generation
1696 * for the read transactions, so that if another reset occurs
1697 * during the scan the transactions will fail instead of
1698 * returning bogus data. */
1699 generation = get_hpsb_generation(host);
1700
1701 /* If we get a reset before we are done waiting, then
1702 * start the waiting over again */
1703 if (generation != g)
1704 g = generation, i = 0;
1705 }
1706
1707 if (!nodemgr_check_irm_capability(host, reset_cycles) ||
1708 !nodemgr_do_irm_duties(host, reset_cycles)) {
1709 reset_cycles++;
1710 continue;
1711 }
1712 reset_cycles = 0;
1713
1714 /* Scan our nodes to get the bus options and create node
1715 * entries. This does not do the sysfs stuff, since that
1716 * would trigger uevents and such, which is a bad idea at
1717 * this point. */
1718 nodemgr_node_scan(host, generation);
1719
1720 /* This actually does the full probe, with sysfs
1721 * registration. */
1722 if (!nodemgr_node_probe(host, generation))
1723 continue;
1724
1725 /* Update some of our sysfs symlinks */
1726 nodemgr_update_host_dev_links(host);
1727
1728 /* Sleep 3 seconds */
1729 for (i = 3000/200; i; i--) {
1730 msleep_interruptible(200);
1731 try_to_freeze();
1732 if (kthread_should_stop())
1733 goto exit;
1734
1735 if (generation != get_hpsb_generation(host))
1736 break;
1737 }
1738 /* Remove nodes which are gone, unless a bus reset happened */
1739 if (!i)
1740 nodemgr_remove_nodes_in_limbo(host);
1741 }
1742exit:
1743 HPSB_VERBOSE("NodeMgr: Exiting thread");
1744 return 0;
1745}
1746
1747struct per_host_parameter {
1748 void *data;
1749 int (*cb)(struct hpsb_host *, void *);
1750};
1751
1752static int per_host(struct device *dev, void *data)
1753{
1754 struct hpsb_host *host;
1755 struct per_host_parameter *p = data;
1756
1757 host = container_of(dev, struct hpsb_host, host_dev);
1758 return p->cb(host, p->data);
1759}
1760
1761/**
1762 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1763 * @data: an address to supply to the callback
1764 * @cb: function to call for each host
1765 *
1766 * Iterate the hosts, calling a given function with supplied data for each host.
1767 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1768 * iteration is stopped.
1769 *
1770 * Return value: 0 on success, non-zero on failure (same as returned by last run
1771 * of the callback).
1772 */
1773int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
1774{
1775 struct per_host_parameter p;
1776
1777 p.cb = cb;
1778 p.data = data;
1779 return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
1780}
1781
1782/* The following two convenience functions use a struct node_entry
1783 * for addressing a node on the bus. They are intended for use by any
1784 * process context, not just the nodemgr thread, so we need to be a
1785 * little careful when reading out the node ID and generation. The
1786 * thing that can go wrong is that we get the node ID, then a bus
1787 * reset occurs, and then we read the generation. The node ID is
1788 * possibly invalid, but the generation is current, and we end up
1789 * sending a packet to a the wrong node.
1790 *
1791 * The solution is to make sure we read the generation first, so that
1792 * if a reset occurs in the process, we end up with a stale generation
1793 * and the transactions will fail instead of silently using wrong node
1794 * ID's.
1795 */
1796
1797/**
1798 * hpsb_node_fill_packet - fill some destination information into a packet
1799 * @ne: destination node
1800 * @packet: packet to fill in
1801 *
1802 * This will fill in the given, pre-initialised hpsb_packet with the current
1803 * information from the node entry (host, node ID, bus generation number).
1804 */
1805void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
1806{
1807 packet->host = ne->host;
1808 packet->generation = ne->generation;
1809 smp_rmb();
1810 packet->node_id = ne->nodeid;
1811}
1812
1813int hpsb_node_write(struct node_entry *ne, u64 addr,
1814 quadlet_t *buffer, size_t length)
1815{
1816 unsigned int generation = ne->generation;
1817
1818 smp_rmb();
1819 return hpsb_write(ne->host, ne->nodeid, generation,
1820 addr, buffer, length);
1821}
1822
1823static void nodemgr_add_host(struct hpsb_host *host)
1824{
1825 struct host_info *hi;
1826
1827 hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
1828 if (!hi) {
1829 HPSB_ERR("NodeMgr: out of memory in add host");
1830 return;
1831 }
1832 hi->host = host;
1833 hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
1834 host->id);
1835 if (IS_ERR(hi->thread)) {
1836 HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
1837 hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
1838 }
1839}
1840
1841static void nodemgr_host_reset(struct hpsb_host *host)
1842{
1843 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1844
1845 if (hi) {
1846 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
1847 wake_up_process(hi->thread);
1848 }
1849}
1850
1851static void nodemgr_remove_host(struct hpsb_host *host)
1852{
1853 struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
1854
1855 if (hi) {
1856 kthread_stop(hi->thread);
1857 nodemgr_remove_host_dev(&host->device);
1858 }
1859}
1860
1861static struct hpsb_highlevel nodemgr_highlevel = {
1862 .name = "Node manager",
1863 .add_host = nodemgr_add_host,
1864 .host_reset = nodemgr_host_reset,
1865 .remove_host = nodemgr_remove_host,
1866};
1867
1868int init_ieee1394_nodemgr(void)
1869{
1870 int error;
1871
1872 error = class_register(&nodemgr_ne_class);
1873 if (error)
1874 goto fail_ne;
1875 error = class_register(&nodemgr_ud_class);
1876 if (error)
1877 goto fail_ud;
1878 error = driver_register(&nodemgr_mid_layer_driver);
1879 if (error)
1880 goto fail_ml;
1881 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1882 nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
1883
1884 hpsb_register_highlevel(&nodemgr_highlevel);
1885 return 0;
1886
1887fail_ml:
1888 class_unregister(&nodemgr_ud_class);
1889fail_ud:
1890 class_unregister(&nodemgr_ne_class);
1891fail_ne:
1892 return error;
1893}
1894
1895void cleanup_ieee1394_nodemgr(void)
1896{
1897 hpsb_unregister_highlevel(&nodemgr_highlevel);
1898 driver_unregister(&nodemgr_mid_layer_driver);
1899 class_unregister(&nodemgr_ud_class);
1900 class_unregister(&nodemgr_ne_class);
1901}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 07:10:15 -0500