2 * Node information (ConfigROM) collection and management.
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
11 #include <linux/bitmap.h>
12 #include <linux/kernel.h>
13 #include <linux/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>
25 #include "highlevel.h"
28 #include "ieee1394_core.h"
29 #include "ieee1394_hotplug.h"
30 #include "ieee1394_types.h"
31 #include "ieee1394_transactions.h"
34 static int ignore_drivers
;
35 module_param(ignore_drivers
, int, S_IRUGO
| S_IWUSR
);
36 MODULE_PARM_DESC(ignore_drivers
, "Disable automatic probing for drivers.");
38 struct nodemgr_csr_info
{
39 struct hpsb_host
*host
;
41 unsigned int generation
;
43 kmemcheck_bitfield_begin(flags
);
44 unsigned int speed_unverified
:1;
45 kmemcheck_bitfield_end(flags
);
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.
55 static int nodemgr_check_speed(struct nodemgr_csr_info
*ci
, u64 addr
,
59 u8 i
, *speed
, old_speed
, good_speed
;
62 speed
= &(ci
->host
->speed
[NODEID_TO_NODE(ci
->nodeid
)]);
64 good_speed
= IEEE1394_SPEED_MAX
+ 1;
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
++) {
72 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
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
]);
84 ci
->speed_unverified
= 0;
91 static int nodemgr_bus_read(struct csr1212_csr
*csr
, u64 addr
,
92 void *buffer
, void *__ci
)
94 struct nodemgr_csr_info
*ci
= (struct nodemgr_csr_info
*)__ci
;
98 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
101 ci
->speed_unverified
= 0;
104 /* Give up after 3rd failure. */
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
);
115 if (msleep_interruptible(334))
121 static struct csr1212_bus_ops nodemgr_csr_ops
= {
122 .bus_read
= nodemgr_bus_read
,
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.
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.
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.
147 struct hpsb_host
*host
;
148 struct list_head list
;
149 struct task_struct
*thread
;
152 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
);
153 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
);
155 struct bus_type ieee1394_bus_type
= {
157 .match
= nodemgr_bus_match
,
160 static void host_cls_release(struct device
*dev
)
162 put_device(&container_of((dev
), struct hpsb_host
, host_dev
)->device
);
165 struct class hpsb_host_class
= {
166 .name
= "ieee1394_host",
167 .dev_release
= host_cls_release
,
170 static void ne_cls_release(struct device
*dev
)
172 put_device(&container_of((dev
), struct node_entry
, node_dev
)->device
);
175 static struct class nodemgr_ne_class
= {
176 .name
= "ieee1394_node",
177 .dev_release
= ne_cls_release
,
180 static void ud_cls_release(struct device
*dev
)
182 put_device(&container_of((dev
), struct unit_directory
, unit_dev
)->device
);
185 /* The name here is only so that unit directory hotplug works with old
186 * style hotplug, which only ever did unit directories anyway.
188 static struct class nodemgr_ud_class
= {
190 .dev_release
= ud_cls_release
,
191 .dev_uevent
= nodemgr_uevent
,
194 static struct hpsb_highlevel nodemgr_highlevel
;
197 static void nodemgr_release_ud(struct device
*dev
)
199 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
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
);
209 static void nodemgr_release_ne(struct device
*dev
)
211 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
213 if (ne
->vendor_name_kv
)
214 csr1212_release_keyval(ne
->vendor_name_kv
);
220 static void nodemgr_release_host(struct device
*dev
)
222 struct hpsb_host
*host
= container_of(dev
, struct hpsb_host
, device
);
224 csr1212_destroy_csr(host
->csr
.rom
);
229 static int nodemgr_ud_platform_data
;
231 static struct device nodemgr_dev_template_ud
= {
232 .bus
= &ieee1394_bus_type
,
233 .release
= nodemgr_release_ud
,
234 .platform_data
= &nodemgr_ud_platform_data
,
237 static struct device nodemgr_dev_template_ne
= {
238 .bus
= &ieee1394_bus_type
,
239 .release
= nodemgr_release_ne
,
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. */
246 static struct device_driver nodemgr_mid_layer_driver
= {
247 .bus
= &ieee1394_bus_type
,
249 .owner
= THIS_MODULE
,
252 struct device nodemgr_dev_template_host
= {
253 .bus
= &ieee1394_bus_type
,
254 .release
= nodemgr_release_host
,
258 #define fw_attr(class, class_type, field, type, format_string) \
259 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
262 class = container_of(dev, class_type, device); \
263 return sprintf(buf, format_string, (type)class->field); \
265 static struct device_attribute dev_attr_##class##_##field = { \
266 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
267 .show = fw_show_##class##_##field, \
270 #define fw_attr_td(class, class_type, td_kv) \
271 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
274 class_type *class = container_of(dev, class_type, device); \
275 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
277 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
279 while (buf[len - 1] == '\0') \
285 static struct device_attribute dev_attr_##class##_##td_kv = { \
286 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
287 .show = fw_show_##class##_##td_kv, \
291 #define fw_drv_attr(field, type, format_string) \
292 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
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);\
298 static struct driver_attribute driver_attr_drv_##field = { \
299 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
300 .show = fw_drv_show_##field, \
304 static ssize_t
fw_show_ne_bus_options(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
306 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
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",
311 ne
->busopt
.cmc
, ne
->busopt
.isc
, ne
->busopt
.bmc
,
312 ne
->busopt
.pmc
, ne
->busopt
.generation
, ne
->busopt
.lnkspd
,
315 ne
->busopt
.cyc_clk_acc
);
317 static DEVICE_ATTR(bus_options
,S_IRUGO
,fw_show_ne_bus_options
,NULL
);
320 #ifdef HPSB_DEBUG_TLABELS
321 static ssize_t
fw_show_ne_tlabels_free(struct device
*dev
,
322 struct device_attribute
*attr
, char *buf
)
324 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
326 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
329 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
330 tf
= 64 - bitmap_weight(tp
, 64);
331 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
333 return sprintf(buf
, "%d\n", tf
);
335 static DEVICE_ATTR(tlabels_free
,S_IRUGO
,fw_show_ne_tlabels_free
,NULL
);
338 static ssize_t
fw_show_ne_tlabels_mask(struct device
*dev
,
339 struct device_attribute
*attr
, char *buf
)
341 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
343 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
346 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
347 #if (BITS_PER_LONG <= 32)
348 tm
= ((u64
)tp
[0] << 32) + tp
[1];
352 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
354 return sprintf(buf
, "0x%016llx\n", (unsigned long long)tm
);
356 static DEVICE_ATTR(tlabels_mask
, S_IRUGO
, fw_show_ne_tlabels_mask
, NULL
);
357 #endif /* HPSB_DEBUG_TLABELS */
360 static ssize_t
fw_set_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
362 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
363 int state
= simple_strtoul(buf
, NULL
, 10);
366 ud
->ignore_driver
= 1;
367 device_release_driver(dev
);
368 } else if (state
== 0)
369 ud
->ignore_driver
= 0;
373 static ssize_t
fw_get_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
375 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
377 return sprintf(buf
, "%d\n", ud
->ignore_driver
);
379 static DEVICE_ATTR(ignore_driver
, S_IWUSR
| S_IRUGO
, fw_get_ignore_driver
, fw_set_ignore_driver
);
382 static ssize_t
fw_set_rescan(struct bus_type
*bus
, const char *buf
,
387 if (simple_strtoul(buf
, NULL
, 10) == 1)
388 error
= bus_rescan_devices(&ieee1394_bus_type
);
389 return error
? error
: count
;
391 static ssize_t
fw_get_rescan(struct bus_type
*bus
, char *buf
)
393 return sprintf(buf
, "You can force a rescan of the bus for "
394 "drivers by writing a 1 to this file\n");
396 static BUS_ATTR(rescan
, S_IWUSR
| S_IRUGO
, fw_get_rescan
, fw_set_rescan
);
399 static ssize_t
fw_set_ignore_drivers(struct bus_type
*bus
, const char *buf
, size_t count
)
401 int state
= simple_strtoul(buf
, NULL
, 10);
410 static ssize_t
fw_get_ignore_drivers(struct bus_type
*bus
, char *buf
)
412 return sprintf(buf
, "%d\n", ignore_drivers
);
414 static BUS_ATTR(ignore_drivers
, S_IWUSR
| S_IRUGO
, fw_get_ignore_drivers
, fw_set_ignore_drivers
);
417 struct bus_attribute
*const fw_bus_attrs
[] = {
419 &bus_attr_ignore_drivers
,
424 fw_attr(ne
, struct node_entry
, capabilities
, unsigned int, "0x%06x\n")
425 fw_attr(ne
, struct node_entry
, nodeid
, unsigned int, "0x%04x\n")
427 fw_attr(ne
, struct node_entry
, vendor_id
, unsigned int, "0x%06x\n")
428 fw_attr_td(ne
, struct node_entry
, vendor_name_kv
)
430 fw_attr(ne
, struct node_entry
, guid
, unsigned long long, "0x%016Lx\n")
431 fw_attr(ne
, struct node_entry
, guid_vendor_id
, unsigned int, "0x%06x\n")
432 fw_attr(ne
, struct node_entry
, in_limbo
, int, "%d\n");
434 static struct device_attribute
*const fw_ne_attrs
[] = {
436 &dev_attr_ne_guid_vendor_id
,
437 &dev_attr_ne_capabilities
,
438 &dev_attr_ne_vendor_id
,
440 &dev_attr_bus_options
,
441 #ifdef HPSB_DEBUG_TLABELS
442 &dev_attr_tlabels_free
,
443 &dev_attr_tlabels_mask
,
449 fw_attr(ud
, struct unit_directory
, address
, unsigned long long, "0x%016Lx\n")
450 fw_attr(ud
, struct unit_directory
, length
, int, "%d\n")
451 /* These are all dependent on the value being provided */
452 fw_attr(ud
, struct unit_directory
, vendor_id
, unsigned int, "0x%06x\n")
453 fw_attr(ud
, struct unit_directory
, model_id
, unsigned int, "0x%06x\n")
454 fw_attr(ud
, struct unit_directory
, specifier_id
, unsigned int, "0x%06x\n")
455 fw_attr(ud
, struct unit_directory
, version
, unsigned int, "0x%06x\n")
456 fw_attr_td(ud
, struct unit_directory
, vendor_name_kv
)
457 fw_attr_td(ud
, struct unit_directory
, model_name_kv
)
459 static struct device_attribute
*const fw_ud_attrs
[] = {
460 &dev_attr_ud_address
,
462 &dev_attr_ignore_driver
,
466 fw_attr(host
, struct hpsb_host
, node_count
, int, "%d\n")
467 fw_attr(host
, struct hpsb_host
, selfid_count
, int, "%d\n")
468 fw_attr(host
, struct hpsb_host
, nodes_active
, int, "%d\n")
469 fw_attr(host
, struct hpsb_host
, in_bus_reset
, int, "%d\n")
470 fw_attr(host
, struct hpsb_host
, is_root
, int, "%d\n")
471 fw_attr(host
, struct hpsb_host
, is_cycmst
, int, "%d\n")
472 fw_attr(host
, struct hpsb_host
, is_irm
, int, "%d\n")
473 fw_attr(host
, struct hpsb_host
, is_busmgr
, int, "%d\n")
475 static 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
,
487 static ssize_t
fw_show_drv_device_ids(struct device_driver
*drv
, char *buf
)
489 struct hpsb_protocol_driver
*driver
;
490 const struct ieee1394_device_id
*id
;
494 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
495 id
= driver
->id_table
;
499 for (; id
->match_flags
!= 0; id
++) {
502 if (id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) {
503 length
+= sprintf(scratch
, "vendor_id=0x%06x", id
->vendor_id
);
504 scratch
= buf
+ length
;
508 if (id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) {
509 length
+= sprintf(scratch
, "%smodel_id=0x%06x",
510 need_coma
++ ? "," : "",
512 scratch
= buf
+ length
;
515 if (id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) {
516 length
+= sprintf(scratch
, "%sspecifier_id=0x%06x",
517 need_coma
++ ? "," : "",
519 scratch
= buf
+ length
;
522 if (id
->match_flags
& IEEE1394_MATCH_VERSION
) {
523 length
+= sprintf(scratch
, "%sversion=0x%06x",
524 need_coma
++ ? "," : "",
526 scratch
= buf
+ length
;
537 static DRIVER_ATTR(device_ids
,S_IRUGO
,fw_show_drv_device_ids
,NULL
);
540 fw_drv_attr(name
, const char *, "%s\n")
542 static struct driver_attribute
*const fw_drv_attrs
[] = {
543 &driver_attr_drv_name
,
544 &driver_attr_device_ids
,
548 static void nodemgr_create_drv_files(struct hpsb_protocol_driver
*driver
)
550 struct device_driver
*drv
= &driver
->driver
;
553 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
554 if (driver_create_file(drv
, fw_drv_attrs
[i
]))
558 HPSB_ERR("Failed to add sysfs attribute");
562 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver
*driver
)
564 struct device_driver
*drv
= &driver
->driver
;
567 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
568 driver_remove_file(drv
, fw_drv_attrs
[i
]);
572 static void nodemgr_create_ne_dev_files(struct node_entry
*ne
)
574 struct device
*dev
= &ne
->device
;
577 for (i
= 0; i
< ARRAY_SIZE(fw_ne_attrs
); i
++)
578 if (device_create_file(dev
, fw_ne_attrs
[i
]))
582 HPSB_ERR("Failed to add sysfs attribute");
586 static void nodemgr_create_host_dev_files(struct hpsb_host
*host
)
588 struct device
*dev
= &host
->device
;
591 for (i
= 0; i
< ARRAY_SIZE(fw_host_attrs
); i
++)
592 if (device_create_file(dev
, fw_host_attrs
[i
]))
596 HPSB_ERR("Failed to add sysfs attribute");
600 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
603 static void nodemgr_update_host_dev_links(struct hpsb_host
*host
)
605 struct device
*dev
= &host
->device
;
606 struct node_entry
*ne
;
608 sysfs_remove_link(&dev
->kobj
, "irm_id");
609 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
610 sysfs_remove_link(&dev
->kobj
, "host_id");
612 if ((ne
= find_entry_by_nodeid(host
, host
->irm_id
)) &&
613 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "irm_id"))
615 if ((ne
= find_entry_by_nodeid(host
, host
->busmgr_id
)) &&
616 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "busmgr_id"))
618 if ((ne
= find_entry_by_nodeid(host
, host
->node_id
)) &&
619 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "host_id"))
623 HPSB_ERR("Failed to update sysfs attributes for host %d", host
->id
);
626 static void nodemgr_create_ud_dev_files(struct unit_directory
*ud
)
628 struct device
*dev
= &ud
->device
;
631 for (i
= 0; i
< ARRAY_SIZE(fw_ud_attrs
); i
++)
632 if (device_create_file(dev
, fw_ud_attrs
[i
]))
634 if (ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
)
635 if (device_create_file(dev
, &dev_attr_ud_specifier_id
))
637 if (ud
->flags
& UNIT_DIRECTORY_VERSION
)
638 if (device_create_file(dev
, &dev_attr_ud_version
))
640 if (ud
->flags
& UNIT_DIRECTORY_VENDOR_ID
) {
641 if (device_create_file(dev
, &dev_attr_ud_vendor_id
))
643 if (ud
->vendor_name_kv
&&
644 device_create_file(dev
, &dev_attr_ud_vendor_name_kv
))
647 if (ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) {
648 if (device_create_file(dev
, &dev_attr_ud_model_id
))
650 if (ud
->model_name_kv
&&
651 device_create_file(dev
, &dev_attr_ud_model_name_kv
))
656 HPSB_ERR("Failed to add sysfs attribute");
660 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
)
662 struct hpsb_protocol_driver
*driver
;
663 struct unit_directory
*ud
;
664 const struct ieee1394_device_id
*id
;
666 /* We only match unit directories */
667 if (dev
->platform_data
!= &nodemgr_ud_platform_data
)
670 ud
= container_of(dev
, struct unit_directory
, device
);
671 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
674 /* We only match drivers of type hpsb_protocol_driver */
675 if (drv
== &nodemgr_mid_layer_driver
)
678 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
679 id
= driver
->id_table
;
683 for (; id
->match_flags
!= 0; id
++) {
684 if ((id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) &&
685 id
->vendor_id
!= ud
->vendor_id
)
688 if ((id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) &&
689 id
->model_id
!= ud
->model_id
)
692 if ((id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) &&
693 id
->specifier_id
!= ud
->specifier_id
)
696 if ((id
->match_flags
& IEEE1394_MATCH_VERSION
) &&
697 id
->version
!= ud
->version
)
707 static DEFINE_MUTEX(nodemgr_serialize_remove_uds
);
709 static int match_ne(struct device
*dev
, void *data
)
711 struct unit_directory
*ud
;
712 struct node_entry
*ne
= data
;
714 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
718 static void nodemgr_remove_uds(struct node_entry
*ne
)
721 struct unit_directory
*ud
;
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.
727 mutex_lock(&nodemgr_serialize_remove_uds
);
729 dev
= class_find_device(&nodemgr_ud_class
, NULL
, ne
, match_ne
);
732 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
734 device_unregister(&ud
->unit_dev
);
735 device_unregister(&ud
->device
);
737 mutex_unlock(&nodemgr_serialize_remove_uds
);
741 static void nodemgr_remove_ne(struct node_entry
*ne
)
745 dev
= get_device(&ne
->device
);
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
);
753 device_unregister(&ne
->node_dev
);
754 device_unregister(dev
);
759 static int remove_host_dev(struct device
*dev
, void *data
)
761 if (dev
->bus
== &ieee1394_bus_type
)
762 nodemgr_remove_ne(container_of(dev
, struct node_entry
,
767 static void nodemgr_remove_host_dev(struct device
*dev
)
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");
776 static void nodemgr_update_bus_options(struct node_entry
*ne
)
778 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
779 static const u16 mr
[] = { 4, 64, 1024, 0};
781 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
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;
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
);
804 static 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
)
808 struct node_entry
*ne
;
810 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
816 ne
->generation
= generation
;
817 ne
->needs_probe
= true;
820 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
823 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
825 ne
->device
.parent
= &host
->device
;
826 dev_set_name(&ne
->device
, "%016Lx", (unsigned long long)(ne
->guid
));
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
));
832 if (device_register(&ne
->device
))
834 if (device_register(&ne
->node_dev
))
835 goto fail_classdevreg
;
836 get_device(&ne
->device
);
838 nodemgr_create_ne_dev_files(ne
);
840 nodemgr_update_bus_options(ne
);
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
);
849 device_unregister(&ne
->device
);
853 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
854 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
859 static int match_ne_guid(struct device
*dev
, void *data
)
861 struct node_entry
*ne
;
864 ne
= container_of(dev
, struct node_entry
, node_dev
);
865 return ne
->guid
== *guid
;
868 static struct node_entry
*find_entry_by_guid(u64 guid
)
871 struct node_entry
*ne
;
873 dev
= class_find_device(&nodemgr_ne_class
, NULL
, &guid
, match_ne_guid
);
876 ne
= container_of(dev
, struct node_entry
, node_dev
);
882 struct match_nodeid_parameter
{
883 struct hpsb_host
*host
;
887 static int match_ne_nodeid(struct device
*dev
, void *data
)
890 struct node_entry
*ne
;
891 struct match_nodeid_parameter
*p
= data
;
895 ne
= container_of(dev
, struct node_entry
, node_dev
);
896 if (ne
->host
== p
->host
&& ne
->nodeid
== p
->nodeid
)
902 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
906 struct node_entry
*ne
;
907 struct match_nodeid_parameter p
;
912 dev
= class_find_device(&nodemgr_ne_class
, NULL
, &p
, match_ne_nodeid
);
915 ne
= container_of(dev
, struct node_entry
, node_dev
);
922 static void nodemgr_register_device(struct node_entry
*ne
,
923 struct unit_directory
*ud
, struct device
*parent
)
925 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
928 ud
->device
.parent
= parent
;
930 dev_set_name(&ud
->device
, "%s-%u", dev_name(&ne
->device
), ud
->id
);
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
);
936 if (device_register(&ud
->device
))
938 if (device_register(&ud
->unit_dev
))
939 goto fail_classdevreg
;
940 get_device(&ud
->device
);
942 nodemgr_create_ud_dev_files(ud
);
947 device_unregister(&ud
->device
);
949 HPSB_ERR("Failed to create unit %s", dev_name(&ud
->device
));
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. */
956 static 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
)
960 struct unit_directory
*ud
;
961 struct unit_directory
*ud_child
= NULL
;
962 struct csr1212_dentry
*dentry
;
963 struct csr1212_keyval
*kv
;
966 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
968 goto unit_directory_error
;
971 ud
->ignore_driver
= ignore_drivers
;
972 ud
->address
= ud_kv
->offset
+ CSR1212_REGISTER_SPACE_BASE
;
973 ud
->directory_id
= ud
->address
& 0xffffff;
977 /* inherit vendor_id from root directory if none exists in unit dir */
978 ud
->vendor_id
= ne
->vendor_id
;
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
;
989 case CSR1212_KV_ID_MODEL
:
990 ud
->model_id
= kv
->value
.immediate
;
991 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
994 case CSR1212_KV_ID_SPECIFIER_ID
:
995 ud
->specifier_id
= kv
->value
.immediate
;
996 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
999 case CSR1212_KV_ID_VERSION
:
1000 ud
->version
= kv
->value
.immediate
;
1001 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
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
;
1017 case CSR1212_KV_ID_MODEL
:
1018 csr1212_keep_keyval(kv
);
1019 ud
->model_name_kv
= kv
;
1023 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
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
);
1032 goto unit_directory_error
;
1033 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1038 ud
->lun
= kv
->value
.immediate
;
1039 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
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.
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
);
1052 /* process the child unit */
1053 ud_child
= nodemgr_process_unit_directory(ne
, kv
, id
, ud
);
1055 if (ud_child
== NULL
)
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
))
1062 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1063 ud_child
->model_id
= ud
->model_id
;
1065 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1066 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1068 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1069 ud_child
->specifier_id
= ud
->specifier_id
;
1071 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1072 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1074 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1075 ud_child
->version
= ud
->version
;
1078 /* register the child unit */
1079 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1080 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
1085 case CSR1212_KV_ID_DIRECTORY_ID
:
1086 ud
->directory_id
= kv
->value
.immediate
;
1092 last_key_id
= kv
->key
.id
;
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
);
1101 unit_directory_error
:
1107 static void nodemgr_process_root_directory(struct node_entry
*ne
)
1109 unsigned int ud_id
= 0;
1110 struct csr1212_dentry
*dentry
;
1111 struct csr1212_keyval
*kv
, *vendor_name_kv
= NULL
;
1114 ne
->needs_probe
= false;
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
;
1122 case CSR1212_KV_ID_NODE_CAPABILITIES
:
1123 ne
->capabilities
= kv
->value
.immediate
;
1126 case CSR1212_KV_ID_UNIT
:
1127 nodemgr_process_unit_directory(ne
, kv
, &ud_id
, NULL
);
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
;
1144 last_key_id
= kv
->key
.id
;
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");
1159 #ifdef CONFIG_HOTPLUG
1161 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1163 struct unit_directory
*ud
;
1165 /* ieee1394:venNmoNspNverN */
1166 char buf
[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1171 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
1173 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1176 #define PUT_ENVP(fmt,val) \
1178 retval = add_uevent_var(env, fmt, val); \
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",
1193 PUT_ENVP("MODALIAS=%s", buf
);
1202 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1207 #endif /* CONFIG_HOTPLUG */
1210 int __hpsb_register_protocol(struct hpsb_protocol_driver
*drv
,
1211 struct module
*owner
)
1215 drv
->driver
.bus
= &ieee1394_bus_type
;
1216 drv
->driver
.owner
= owner
;
1217 drv
->driver
.name
= drv
->name
;
1219 /* This will cause a probe for devices */
1220 error
= driver_register(&drv
->driver
);
1222 nodemgr_create_drv_files(drv
);
1226 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
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
);
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.
1242 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1243 nodeid_t nodeid
, unsigned int generation
)
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
;
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
);
1257 /* If the node's configrom generation has changed, we
1258 * unregister all the unit directories. */
1259 nodemgr_remove_uds(ne
);
1261 nodemgr_update_bus_options(ne
);
1263 /* Mark the node as new, so it gets re-probed */
1264 ne
->needs_probe
= true;
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
);
1274 /* Finally, mark the node current */
1276 ne
->generation
= generation
;
1279 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1280 ne
->in_limbo
= false;
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
);
1289 static void nodemgr_node_scan_one(struct hpsb_host
*host
,
1290 nodeid_t nodeid
, int generation
)
1292 struct node_entry
*ne
;
1294 struct csr1212_csr
*csr
;
1295 struct nodemgr_csr_info
*ci
;
1298 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
1299 kmemcheck_annotate_bitfield(ci
, flags
);
1304 ci
->nodeid
= nodeid
;
1305 ci
->generation
= generation
;
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
;
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. */
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
));
1321 csr1212_destroy_csr(csr
);
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
1334 HPSB_WARN("Node " NODE_BUS_FMT
" has invalid busID magic [0x%08x]",
1335 NODE_BUS_ARGS(host
, nodeid
), csr
->bus_info_data
[1]);
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
);
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
);
1348 nodemgr_create_node(guid
, csr
, host
, nodeid
, generation
);
1350 nodemgr_update_node(ne
, csr
, nodeid
, generation
);
1354 static void nodemgr_node_scan(struct hpsb_host
*host
, int generation
)
1357 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1358 nodeid_t nodeid
= LOCAL_BUS
;
1360 /* Scan each node on the bus */
1361 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1365 if (!sid
->link_active
) {
1369 nodemgr_node_scan_one(host
, nodeid
++, generation
);
1373 static void nodemgr_pause_ne(struct node_entry
*ne
)
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
);
1379 ne
->in_limbo
= true;
1380 WARN_ON(device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
));
1383 static int update_pdrv(struct device
*dev
, void *data
)
1385 struct unit_directory
*ud
;
1386 struct device_driver
*drv
;
1387 struct hpsb_protocol_driver
*pdrv
;
1388 struct node_entry
*ne
= data
;
1391 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
1393 drv
= get_driver(ud
->device
.driver
);
1396 pdrv
= container_of(drv
, struct hpsb_protocol_driver
,
1399 device_lock(&ud
->device
);
1400 error
= pdrv
->update(ud
);
1401 device_unlock(&ud
->device
);
1404 device_release_driver(&ud
->device
);
1412 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1414 class_for_each_device(&nodemgr_ud_class
, NULL
, ne
, update_pdrv
);
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.
1421 * Note that we cannot do a broadcast write to all nodes at once because some
1422 * pre-1394a devices would hang. */
1423 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1425 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1426 quadlet_t bc_remote
, bc_local
;
1429 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1430 ne
->nodeid
== ne
->host
->node_id
)
1433 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1435 /* Check if the register is implemented and 1394a compliant. */
1436 error
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &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
));
1444 static void nodemgr_probe_ne(struct hpsb_host
*host
, struct node_entry
*ne
,
1449 if (ne
->host
!= host
|| ne
->in_limbo
)
1452 dev
= get_device(&ne
->device
);
1456 nodemgr_irm_write_bc(ne
, generation
);
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
1463 if (ne
->needs_probe
)
1464 nodemgr_process_root_directory(ne
);
1465 else if (ne
->generation
== generation
)
1466 nodemgr_update_pdrv(ne
);
1468 nodemgr_pause_ne(ne
);
1473 struct node_probe_parameter
{
1474 struct hpsb_host
*host
;
1479 static int node_probe(struct device
*dev
, void *data
)
1481 struct node_probe_parameter
*p
= data
;
1482 struct node_entry
*ne
;
1484 if (p
->generation
!= get_hpsb_generation(p
->host
))
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
);
1493 static int nodemgr_node_probe(struct hpsb_host
*host
, int generation
)
1495 struct node_probe_parameter p
;
1498 p
.generation
= generation
;
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
1505 * Run updates before probes. Usually, updates are time-critical
1506 * while probes are time-consuming.
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.
1512 p
.probe_now
= false;
1513 if (class_for_each_device(&nodemgr_ne_class
, NULL
, &p
, node_probe
) != 0)
1517 if (class_for_each_device(&nodemgr_ne_class
, NULL
, &p
, node_probe
) != 0)
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
1528 if (bus_rescan_devices(&ieee1394_bus_type
) != 0)
1529 HPSB_DEBUG("bus_rescan_devices had an error");
1534 static int remove_nodes_in_limbo(struct device
*dev
, void *data
)
1536 struct node_entry
*ne
;
1538 if (dev
->bus
!= &ieee1394_bus_type
)
1541 ne
= container_of(dev
, struct node_entry
, device
);
1543 nodemgr_remove_ne(ne
);
1548 static void nodemgr_remove_nodes_in_limbo(struct hpsb_host
*host
)
1550 device_for_each_child(&host
->device
, NULL
, remove_nodes_in_limbo
);
1553 static int nodemgr_send_resume_packet(struct hpsb_host
*host
)
1555 struct hpsb_packet
*packet
;
1556 int error
= -ENOMEM
;
1558 packet
= hpsb_make_phypacket(host
,
1559 EXTPHYPACKET_TYPE_RESUME
|
1560 NODEID_TO_NODE(host
->node_id
) << PHYPACKET_PORT_SHIFT
);
1562 packet
->no_waiter
= 1;
1563 packet
->generation
= get_hpsb_generation(host
);
1564 error
= hpsb_send_packet(packet
);
1567 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1572 /* Perform a few high-level IRM responsibilities. */
1573 static int nodemgr_do_irm_duties(struct hpsb_host
*host
, int cycles
)
1577 /* if irm_id == -1 then there is no IRM on this bus */
1578 if (!host
->is_irm
|| host
->irm_id
== (nodeid_t
)-1)
1581 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1582 host
->csr
.broadcast_channel
|= 0x40000000;
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)
1589 u16 root_node
= host
->node_count
- 1;
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);
1599 HPSB_DEBUG("The root node is not cycle master capable; "
1600 "selecting a new root node and resetting...");
1603 /* Oh screw it! Just leave the bus as it is */
1604 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1608 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1609 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
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;
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
1628 static int nodemgr_check_irm_capability(struct hpsb_host
*host
, int cycles
)
1633 if (hpsb_disable_irm
|| host
->is_irm
)
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
));
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...");
1647 /* Oh screw it! Just leave the bus as it is */
1648 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1652 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1653 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1661 static int nodemgr_host_thread(void *data
)
1663 struct hpsb_host
*host
= data
;
1664 unsigned int g
, generation
= 0;
1665 int i
, reset_cycles
= 0;
1668 /* Setup our device-model entries */
1669 nodemgr_create_host_dev_files(host
);
1672 /* Sleep until next bus reset */
1673 set_current_state(TASK_INTERRUPTIBLE
);
1674 if (get_hpsb_generation(host
) == generation
&&
1675 !kthread_should_stop())
1677 __set_current_state(TASK_RUNNING
);
1679 /* Thread may have been woken up to freeze or to exit */
1680 if (try_to_freeze())
1682 if (kthread_should_stop())
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);
1691 if (kthread_should_stop())
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
);
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;
1707 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1708 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
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
1718 nodemgr_node_scan(host
, generation
);
1720 /* This actually does the full probe, with sysfs
1722 if (!nodemgr_node_probe(host
, generation
))
1725 /* Update some of our sysfs symlinks */
1726 nodemgr_update_host_dev_links(host
);
1728 /* Sleep 3 seconds */
1729 for (i
= 3000/200; i
; i
--) {
1730 msleep_interruptible(200);
1732 if (kthread_should_stop())
1735 if (generation
!= get_hpsb_generation(host
))
1738 /* Remove nodes which are gone, unless a bus reset happened */
1740 nodemgr_remove_nodes_in_limbo(host
);
1743 HPSB_VERBOSE("NodeMgr: Exiting thread");
1747 struct per_host_parameter
{
1749 int (*cb
)(struct hpsb_host
*, void *);
1752 static int per_host(struct device
*dev
, void *data
)
1754 struct hpsb_host
*host
;
1755 struct per_host_parameter
*p
= data
;
1757 host
= container_of(dev
, struct hpsb_host
, host_dev
);
1758 return p
->cb(host
, p
->data
);
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
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.
1770 * Return value: 0 on success, non-zero on failure (same as returned by last run
1773 int nodemgr_for_each_host(void *data
, int (*cb
)(struct hpsb_host
*, void *))
1775 struct per_host_parameter p
;
1779 return class_for_each_device(&hpsb_host_class
, NULL
, &p
, per_host
);
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.
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
1798 * hpsb_node_fill_packet - fill some destination information into a packet
1799 * @ne: destination node
1800 * @packet: packet to fill in
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).
1805 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*packet
)
1807 packet
->host
= ne
->host
;
1808 packet
->generation
= ne
->generation
;
1810 packet
->node_id
= ne
->nodeid
;
1813 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1814 quadlet_t
*buffer
, size_t length
)
1816 unsigned int generation
= ne
->generation
;
1819 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1820 addr
, buffer
, length
);
1823 static void nodemgr_add_host(struct hpsb_host
*host
)
1825 struct host_info
*hi
;
1827 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1829 HPSB_ERR("NodeMgr: out of memory in add host");
1833 hi
->thread
= kthread_run(nodemgr_host_thread
, host
, "knodemgrd_%d",
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
);
1841 static void nodemgr_host_reset(struct hpsb_host
*host
)
1843 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1846 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host
->id
);
1847 wake_up_process(hi
->thread
);
1851 static void nodemgr_remove_host(struct hpsb_host
*host
)
1853 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1856 kthread_stop(hi
->thread
);
1857 nodemgr_remove_host_dev(&host
->device
);
1861 static 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
,
1868 int init_ieee1394_nodemgr(void)
1872 error
= class_register(&nodemgr_ne_class
);
1875 error
= class_register(&nodemgr_ud_class
);
1878 error
= driver_register(&nodemgr_mid_layer_driver
);
1881 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1882 nodemgr_dev_template_host
.driver
= &nodemgr_mid_layer_driver
;
1884 hpsb_register_highlevel(&nodemgr_highlevel
);
1888 class_unregister(&nodemgr_ud_class
);
1890 class_unregister(&nodemgr_ne_class
);
1895 void cleanup_ieee1394_nodemgr(void)
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
);