2 * Node information (ConfigROM) collection and management.
4 * Copyright (C) 2000 Andreas E. Bombe
5 * 2001-2003 Ben Collins <bcollins@debian.net>
7 * This code is licensed under the GPL. See the file COPYING in the root
8 * directory of the kernel sources for details.
11 #include <linux/bitmap.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/slab.h>
15 #include <linux/delay.h>
16 #include <linux/kthread.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/freezer.h>
20 #include <asm/atomic.h>
23 #include "highlevel.h"
26 #include "ieee1394_core.h"
27 #include "ieee1394_hotplug.h"
28 #include "ieee1394_types.h"
29 #include "ieee1394_transactions.h"
32 static int ignore_drivers
;
33 module_param(ignore_drivers
, int, S_IRUGO
| S_IWUSR
);
34 MODULE_PARM_DESC(ignore_drivers
, "Disable automatic probing for drivers.");
36 struct nodemgr_csr_info
{
37 struct hpsb_host
*host
;
39 unsigned int generation
;
40 unsigned int speed_unverified
:1;
45 * Correct the speed map entry. This is necessary
46 * - for nodes with link speed < phy speed,
47 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
48 * A possible speed is determined by trial and error, using quadlet reads.
50 static int nodemgr_check_speed(struct nodemgr_csr_info
*ci
, u64 addr
,
54 u8 i
, *speed
, old_speed
, good_speed
;
57 speed
= &(ci
->host
->speed
[NODEID_TO_NODE(ci
->nodeid
)]);
59 good_speed
= IEEE1394_SPEED_MAX
+ 1;
61 /* Try every speed from S100 to old_speed.
62 * If we did it the other way around, a too low speed could be caught
63 * if the retry succeeded for some other reason, e.g. because the link
64 * just finished its initialization. */
65 for (i
= IEEE1394_SPEED_100
; i
<= old_speed
; i
++) {
67 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
68 &q
, sizeof(quadlet_t
));
74 if (good_speed
<= IEEE1394_SPEED_MAX
) {
75 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT
" yields %s",
76 NODE_BUS_ARGS(ci
->host
, ci
->nodeid
),
77 hpsb_speedto_str
[good_speed
]);
79 ci
->speed_unverified
= 0;
86 static int nodemgr_bus_read(struct csr1212_csr
*csr
, u64 addr
, u16 length
,
87 void *buffer
, void *__ci
)
89 struct nodemgr_csr_info
*ci
= (struct nodemgr_csr_info
*)__ci
;
93 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
96 ci
->speed_unverified
= 0;
99 /* Give up after 3rd failure. */
103 /* The ieee1394_core guessed the node's speed capability from
104 * the self ID. Check whether a lower speed works. */
105 if (ci
->speed_unverified
&& length
== sizeof(quadlet_t
)) {
106 error
= nodemgr_check_speed(ci
, addr
, buffer
);
110 if (msleep_interruptible(334))
116 static int nodemgr_get_max_rom(quadlet_t
*bus_info_data
, void *__ci
)
118 return (CSR1212_BE32_TO_CPU(bus_info_data
[2]) >> 8) & 0x3;
121 static struct csr1212_bus_ops nodemgr_csr_ops
= {
122 .bus_read
= nodemgr_bus_read
,
123 .get_max_rom
= nodemgr_get_max_rom
128 * Basically what we do here is start off retrieving the bus_info block.
129 * From there will fill in some info about the node, verify it is of IEEE
130 * 1394 type, and that the crc checks out ok. After that we start off with
131 * the root directory, and subdirectories. To do this, we retrieve the
132 * quadlet header for a directory, find out the length, and retrieve the
133 * complete directory entry (be it a leaf or a directory). We then process
134 * it and add the info to our structure for that particular node.
136 * We verify CRC's along the way for each directory/block/leaf. The entire
137 * node structure is generic, and simply stores the information in a way
138 * that's easy to parse by the protocol interface.
142 * The nodemgr relies heavily on the Driver Model for device callbacks and
143 * driver/device mappings. The old nodemgr used to handle all this itself,
144 * but now we are much simpler because of the LDM.
147 static DEFINE_MUTEX(nodemgr_serialize
);
150 struct hpsb_host
*host
;
151 struct list_head list
;
152 struct task_struct
*thread
;
155 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
);
156 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
157 char *buffer
, int buffer_size
);
158 static void nodemgr_resume_ne(struct node_entry
*ne
);
159 static void nodemgr_remove_ne(struct node_entry
*ne
);
160 static struct node_entry
*find_entry_by_guid(u64 guid
);
162 struct bus_type ieee1394_bus_type
= {
164 .match
= nodemgr_bus_match
,
167 static void host_cls_release(struct class_device
*class_dev
)
169 put_device(&container_of((class_dev
), struct hpsb_host
, class_dev
)->device
);
172 struct class hpsb_host_class
= {
173 .name
= "ieee1394_host",
174 .release
= host_cls_release
,
177 static void ne_cls_release(struct class_device
*class_dev
)
179 put_device(&container_of((class_dev
), struct node_entry
, class_dev
)->device
);
182 static struct class nodemgr_ne_class
= {
183 .name
= "ieee1394_node",
184 .release
= ne_cls_release
,
187 static void ud_cls_release(struct class_device
*class_dev
)
189 put_device(&container_of((class_dev
), struct unit_directory
, class_dev
)->device
);
192 /* The name here is only so that unit directory hotplug works with old
193 * style hotplug, which only ever did unit directories anyway. */
194 static struct class nodemgr_ud_class
= {
196 .release
= ud_cls_release
,
197 .uevent
= nodemgr_uevent
,
200 static struct hpsb_highlevel nodemgr_highlevel
;
203 static void nodemgr_release_ud(struct device
*dev
)
205 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
207 if (ud
->vendor_name_kv
)
208 csr1212_release_keyval(ud
->vendor_name_kv
);
209 if (ud
->model_name_kv
)
210 csr1212_release_keyval(ud
->model_name_kv
);
215 static void nodemgr_release_ne(struct device
*dev
)
217 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
219 if (ne
->vendor_name_kv
)
220 csr1212_release_keyval(ne
->vendor_name_kv
);
226 static void nodemgr_release_host(struct device
*dev
)
228 struct hpsb_host
*host
= container_of(dev
, struct hpsb_host
, device
);
230 csr1212_destroy_csr(host
->csr
.rom
);
235 static int nodemgr_ud_platform_data
;
237 static struct device nodemgr_dev_template_ud
= {
238 .bus
= &ieee1394_bus_type
,
239 .release
= nodemgr_release_ud
,
240 .platform_data
= &nodemgr_ud_platform_data
,
243 static struct device nodemgr_dev_template_ne
= {
244 .bus
= &ieee1394_bus_type
,
245 .release
= nodemgr_release_ne
,
248 /* This dummy driver prevents the host devices from being scanned. We have no
249 * useful drivers for them yet, and there would be a deadlock possible if the
250 * driver core scans the host device while the host's low-level driver (i.e.
251 * the host's parent device) is being removed. */
252 static struct device_driver nodemgr_mid_layer_driver
= {
253 .bus
= &ieee1394_bus_type
,
255 .owner
= THIS_MODULE
,
258 struct device nodemgr_dev_template_host
= {
259 .bus
= &ieee1394_bus_type
,
260 .release
= nodemgr_release_host
,
264 #define fw_attr(class, class_type, field, type, format_string) \
265 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
268 class = container_of(dev, class_type, device); \
269 return sprintf(buf, format_string, (type)class->field); \
271 static struct device_attribute dev_attr_##class##_##field = { \
272 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
273 .show = fw_show_##class##_##field, \
276 #define fw_attr_td(class, class_type, td_kv) \
277 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
280 class_type *class = container_of(dev, class_type, device); \
281 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
283 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
285 while ((buf + len - 1) == '\0') \
291 static struct device_attribute dev_attr_##class##_##td_kv = { \
292 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
293 .show = fw_show_##class##_##td_kv, \
297 #define fw_drv_attr(field, type, format_string) \
298 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
300 struct hpsb_protocol_driver *driver; \
301 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
302 return sprintf(buf, format_string, (type)driver->field);\
304 static struct driver_attribute driver_attr_drv_##field = { \
305 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
306 .show = fw_drv_show_##field, \
310 static ssize_t
fw_show_ne_bus_options(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
312 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
314 return sprintf(buf
, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
315 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
317 ne
->busopt
.cmc
, ne
->busopt
.isc
, ne
->busopt
.bmc
,
318 ne
->busopt
.pmc
, ne
->busopt
.generation
, ne
->busopt
.lnkspd
,
321 ne
->busopt
.cyc_clk_acc
);
323 static DEVICE_ATTR(bus_options
,S_IRUGO
,fw_show_ne_bus_options
,NULL
);
326 #ifdef HPSB_DEBUG_TLABELS
327 static ssize_t
fw_show_ne_tlabels_free(struct device
*dev
,
328 struct device_attribute
*attr
, char *buf
)
330 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
332 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
335 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
336 tf
= 64 - bitmap_weight(tp
, 64);
337 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
339 return sprintf(buf
, "%d\n", tf
);
341 static DEVICE_ATTR(tlabels_free
,S_IRUGO
,fw_show_ne_tlabels_free
,NULL
);
344 static ssize_t
fw_show_ne_tlabels_mask(struct device
*dev
,
345 struct device_attribute
*attr
, char *buf
)
347 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
349 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
352 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
353 #if (BITS_PER_LONG <= 32)
354 tm
= ((u64
)tp
[0] << 32) + tp
[1];
358 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
360 return sprintf(buf
, "0x%016llx\n", (unsigned long long)tm
);
362 static DEVICE_ATTR(tlabels_mask
, S_IRUGO
, fw_show_ne_tlabels_mask
, NULL
);
363 #endif /* HPSB_DEBUG_TLABELS */
366 static ssize_t
fw_set_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
368 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
369 int state
= simple_strtoul(buf
, NULL
, 10);
372 ud
->ignore_driver
= 1;
373 device_release_driver(dev
);
374 } else if (state
== 0)
375 ud
->ignore_driver
= 0;
379 static ssize_t
fw_get_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
381 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
383 return sprintf(buf
, "%d\n", ud
->ignore_driver
);
385 static DEVICE_ATTR(ignore_driver
, S_IWUSR
| S_IRUGO
, fw_get_ignore_driver
, fw_set_ignore_driver
);
388 static ssize_t
fw_set_destroy_node(struct bus_type
*bus
, const char *buf
, size_t count
)
390 struct node_entry
*ne
;
391 u64 guid
= (u64
)simple_strtoull(buf
, NULL
, 16);
393 ne
= find_entry_by_guid(guid
);
395 if (ne
== NULL
|| !ne
->in_limbo
)
398 nodemgr_remove_ne(ne
);
402 static ssize_t
fw_get_destroy_node(struct bus_type
*bus
, char *buf
)
404 return sprintf(buf
, "You can destroy in_limbo nodes by writing their GUID to this file\n");
406 static BUS_ATTR(destroy_node
, S_IWUSR
| S_IRUGO
, fw_get_destroy_node
, fw_set_destroy_node
);
409 static ssize_t
fw_set_rescan(struct bus_type
*bus
, const char *buf
,
414 if (simple_strtoul(buf
, NULL
, 10) == 1)
415 error
= bus_rescan_devices(&ieee1394_bus_type
);
416 return error
? error
: count
;
418 static ssize_t
fw_get_rescan(struct bus_type
*bus
, char *buf
)
420 return sprintf(buf
, "You can force a rescan of the bus for "
421 "drivers by writing a 1 to this file\n");
423 static BUS_ATTR(rescan
, S_IWUSR
| S_IRUGO
, fw_get_rescan
, fw_set_rescan
);
426 static ssize_t
fw_set_ignore_drivers(struct bus_type
*bus
, const char *buf
, size_t count
)
428 int state
= simple_strtoul(buf
, NULL
, 10);
437 static ssize_t
fw_get_ignore_drivers(struct bus_type
*bus
, char *buf
)
439 return sprintf(buf
, "%d\n", ignore_drivers
);
441 static BUS_ATTR(ignore_drivers
, S_IWUSR
| S_IRUGO
, fw_get_ignore_drivers
, fw_set_ignore_drivers
);
444 struct bus_attribute
*const fw_bus_attrs
[] = {
445 &bus_attr_destroy_node
,
447 &bus_attr_ignore_drivers
,
452 fw_attr(ne
, struct node_entry
, capabilities
, unsigned int, "0x%06x\n")
453 fw_attr(ne
, struct node_entry
, nodeid
, unsigned int, "0x%04x\n")
455 fw_attr(ne
, struct node_entry
, vendor_id
, unsigned int, "0x%06x\n")
456 fw_attr_td(ne
, struct node_entry
, vendor_name_kv
)
458 fw_attr(ne
, struct node_entry
, guid
, unsigned long long, "0x%016Lx\n")
459 fw_attr(ne
, struct node_entry
, guid_vendor_id
, unsigned int, "0x%06x\n")
460 fw_attr(ne
, struct node_entry
, in_limbo
, int, "%d\n");
462 static struct device_attribute
*const fw_ne_attrs
[] = {
464 &dev_attr_ne_guid_vendor_id
,
465 &dev_attr_ne_capabilities
,
466 &dev_attr_ne_vendor_id
,
468 &dev_attr_bus_options
,
469 #ifdef HPSB_DEBUG_TLABELS
470 &dev_attr_tlabels_free
,
471 &dev_attr_tlabels_mask
,
477 fw_attr(ud
, struct unit_directory
, address
, unsigned long long, "0x%016Lx\n")
478 fw_attr(ud
, struct unit_directory
, length
, int, "%d\n")
479 /* These are all dependent on the value being provided */
480 fw_attr(ud
, struct unit_directory
, vendor_id
, unsigned int, "0x%06x\n")
481 fw_attr(ud
, struct unit_directory
, model_id
, unsigned int, "0x%06x\n")
482 fw_attr(ud
, struct unit_directory
, specifier_id
, unsigned int, "0x%06x\n")
483 fw_attr(ud
, struct unit_directory
, version
, unsigned int, "0x%06x\n")
484 fw_attr_td(ud
, struct unit_directory
, vendor_name_kv
)
485 fw_attr_td(ud
, struct unit_directory
, model_name_kv
)
487 static struct device_attribute
*const fw_ud_attrs
[] = {
488 &dev_attr_ud_address
,
490 &dev_attr_ignore_driver
,
494 fw_attr(host
, struct hpsb_host
, node_count
, int, "%d\n")
495 fw_attr(host
, struct hpsb_host
, selfid_count
, int, "%d\n")
496 fw_attr(host
, struct hpsb_host
, nodes_active
, int, "%d\n")
497 fw_attr(host
, struct hpsb_host
, in_bus_reset
, int, "%d\n")
498 fw_attr(host
, struct hpsb_host
, is_root
, int, "%d\n")
499 fw_attr(host
, struct hpsb_host
, is_cycmst
, int, "%d\n")
500 fw_attr(host
, struct hpsb_host
, is_irm
, int, "%d\n")
501 fw_attr(host
, struct hpsb_host
, is_busmgr
, int, "%d\n")
503 static struct device_attribute
*const fw_host_attrs
[] = {
504 &dev_attr_host_node_count
,
505 &dev_attr_host_selfid_count
,
506 &dev_attr_host_nodes_active
,
507 &dev_attr_host_in_bus_reset
,
508 &dev_attr_host_is_root
,
509 &dev_attr_host_is_cycmst
,
510 &dev_attr_host_is_irm
,
511 &dev_attr_host_is_busmgr
,
515 static ssize_t
fw_show_drv_device_ids(struct device_driver
*drv
, char *buf
)
517 struct hpsb_protocol_driver
*driver
;
518 struct ieee1394_device_id
*id
;
522 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
524 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
527 if (id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) {
528 length
+= sprintf(scratch
, "vendor_id=0x%06x", id
->vendor_id
);
529 scratch
= buf
+ length
;
533 if (id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) {
534 length
+= sprintf(scratch
, "%smodel_id=0x%06x",
535 need_coma
++ ? "," : "",
537 scratch
= buf
+ length
;
540 if (id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) {
541 length
+= sprintf(scratch
, "%sspecifier_id=0x%06x",
542 need_coma
++ ? "," : "",
544 scratch
= buf
+ length
;
547 if (id
->match_flags
& IEEE1394_MATCH_VERSION
) {
548 length
+= sprintf(scratch
, "%sversion=0x%06x",
549 need_coma
++ ? "," : "",
551 scratch
= buf
+ length
;
562 static DRIVER_ATTR(device_ids
,S_IRUGO
,fw_show_drv_device_ids
,NULL
);
565 fw_drv_attr(name
, const char *, "%s\n")
567 static struct driver_attribute
*const fw_drv_attrs
[] = {
568 &driver_attr_drv_name
,
569 &driver_attr_device_ids
,
573 static void nodemgr_create_drv_files(struct hpsb_protocol_driver
*driver
)
575 struct device_driver
*drv
= &driver
->driver
;
578 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
579 if (driver_create_file(drv
, fw_drv_attrs
[i
]))
583 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver
->name
);
587 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver
*driver
)
589 struct device_driver
*drv
= &driver
->driver
;
592 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
593 driver_remove_file(drv
, fw_drv_attrs
[i
]);
597 static void nodemgr_create_ne_dev_files(struct node_entry
*ne
)
599 struct device
*dev
= &ne
->device
;
602 for (i
= 0; i
< ARRAY_SIZE(fw_ne_attrs
); i
++)
603 if (device_create_file(dev
, fw_ne_attrs
[i
]))
607 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
608 (unsigned long long)ne
->guid
);
612 static void nodemgr_create_host_dev_files(struct hpsb_host
*host
)
614 struct device
*dev
= &host
->device
;
617 for (i
= 0; i
< ARRAY_SIZE(fw_host_attrs
); i
++)
618 if (device_create_file(dev
, fw_host_attrs
[i
]))
622 HPSB_ERR("Failed to add sysfs attribute for host %d", host
->id
);
626 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
629 static void nodemgr_update_host_dev_links(struct hpsb_host
*host
)
631 struct device
*dev
= &host
->device
;
632 struct node_entry
*ne
;
634 sysfs_remove_link(&dev
->kobj
, "irm_id");
635 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
636 sysfs_remove_link(&dev
->kobj
, "host_id");
638 if ((ne
= find_entry_by_nodeid(host
, host
->irm_id
)) &&
639 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "irm_id"))
641 if ((ne
= find_entry_by_nodeid(host
, host
->busmgr_id
)) &&
642 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "busmgr_id"))
644 if ((ne
= find_entry_by_nodeid(host
, host
->node_id
)) &&
645 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "host_id"))
649 HPSB_ERR("Failed to update sysfs attributes for host %d", host
->id
);
652 static void nodemgr_create_ud_dev_files(struct unit_directory
*ud
)
654 struct device
*dev
= &ud
->device
;
657 for (i
= 0; i
< ARRAY_SIZE(fw_ud_attrs
); i
++)
658 if (device_create_file(dev
, fw_ud_attrs
[i
]))
660 if (ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
)
661 if (device_create_file(dev
, &dev_attr_ud_specifier_id
))
663 if (ud
->flags
& UNIT_DIRECTORY_VERSION
)
664 if (device_create_file(dev
, &dev_attr_ud_version
))
666 if (ud
->flags
& UNIT_DIRECTORY_VENDOR_ID
) {
667 if (device_create_file(dev
, &dev_attr_ud_vendor_id
))
669 if (ud
->vendor_name_kv
&&
670 device_create_file(dev
, &dev_attr_ud_vendor_name_kv
))
673 if (ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) {
674 if (device_create_file(dev
, &dev_attr_ud_model_id
))
676 if (ud
->model_name_kv
&&
677 device_create_file(dev
, &dev_attr_ud_model_name_kv
))
682 HPSB_ERR("Failed to add sysfs attributes for unit %s",
687 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
)
689 struct hpsb_protocol_driver
*driver
;
690 struct unit_directory
*ud
;
691 struct ieee1394_device_id
*id
;
693 /* We only match unit directories */
694 if (dev
->platform_data
!= &nodemgr_ud_platform_data
)
697 ud
= container_of(dev
, struct unit_directory
, device
);
698 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
701 /* We only match drivers of type hpsb_protocol_driver */
702 if (drv
== &nodemgr_mid_layer_driver
)
705 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
706 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
707 if ((id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) &&
708 id
->vendor_id
!= ud
->vendor_id
)
711 if ((id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) &&
712 id
->model_id
!= ud
->model_id
)
715 if ((id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) &&
716 id
->specifier_id
!= ud
->specifier_id
)
719 if ((id
->match_flags
& IEEE1394_MATCH_VERSION
) &&
720 id
->version
!= ud
->version
)
730 static DEFINE_MUTEX(nodemgr_serialize_remove_uds
);
732 static void nodemgr_remove_uds(struct node_entry
*ne
)
734 struct class_device
*cdev
;
735 struct unit_directory
*tmp
, *ud
;
737 /* Iteration over nodemgr_ud_class.children has to be protected by
738 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
739 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
740 * release the semaphore, and then unregister the ud. Since this code
741 * may be called from other contexts besides the knodemgrds, protect the
742 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
744 mutex_lock(&nodemgr_serialize_remove_uds
);
747 down(&nodemgr_ud_class
.sem
);
748 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
749 tmp
= container_of(cdev
, struct unit_directory
,
756 up(&nodemgr_ud_class
.sem
);
759 class_device_unregister(&ud
->class_dev
);
760 device_unregister(&ud
->device
);
762 mutex_unlock(&nodemgr_serialize_remove_uds
);
766 static void nodemgr_remove_ne(struct node_entry
*ne
)
770 dev
= get_device(&ne
->device
);
774 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
775 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
777 nodemgr_remove_uds(ne
);
779 class_device_unregister(&ne
->class_dev
);
780 device_unregister(dev
);
785 static int __nodemgr_remove_host_dev(struct device
*dev
, void *data
)
787 nodemgr_remove_ne(container_of(dev
, struct node_entry
, device
));
791 static void nodemgr_remove_host_dev(struct device
*dev
)
793 WARN_ON(device_for_each_child(dev
, NULL
, __nodemgr_remove_host_dev
));
794 sysfs_remove_link(&dev
->kobj
, "irm_id");
795 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
796 sysfs_remove_link(&dev
->kobj
, "host_id");
800 static void nodemgr_update_bus_options(struct node_entry
*ne
)
802 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
803 static const u16 mr
[] = { 4, 64, 1024, 0};
805 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
807 ne
->busopt
.irmc
= (busoptions
>> 31) & 1;
808 ne
->busopt
.cmc
= (busoptions
>> 30) & 1;
809 ne
->busopt
.isc
= (busoptions
>> 29) & 1;
810 ne
->busopt
.bmc
= (busoptions
>> 28) & 1;
811 ne
->busopt
.pmc
= (busoptions
>> 27) & 1;
812 ne
->busopt
.cyc_clk_acc
= (busoptions
>> 16) & 0xff;
813 ne
->busopt
.max_rec
= 1 << (((busoptions
>> 12) & 0xf) + 1);
814 ne
->busopt
.max_rom
= (busoptions
>> 8) & 0x3;
815 ne
->busopt
.generation
= (busoptions
>> 4) & 0xf;
816 ne
->busopt
.lnkspd
= busoptions
& 0x7;
818 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
819 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
820 busoptions
, ne
->busopt
.irmc
, ne
->busopt
.cmc
,
821 ne
->busopt
.isc
, ne
->busopt
.bmc
, ne
->busopt
.pmc
,
822 ne
->busopt
.cyc_clk_acc
, ne
->busopt
.max_rec
,
823 mr
[ne
->busopt
.max_rom
],
824 ne
->busopt
.generation
, ne
->busopt
.lnkspd
);
828 static struct node_entry
*nodemgr_create_node(octlet_t guid
, struct csr1212_csr
*csr
,
829 struct host_info
*hi
, nodeid_t nodeid
,
830 unsigned int generation
)
832 struct hpsb_host
*host
= hi
->host
;
833 struct node_entry
*ne
;
835 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
841 ne
->generation
= generation
;
845 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
848 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
850 ne
->device
.parent
= &host
->device
;
851 snprintf(ne
->device
.bus_id
, BUS_ID_SIZE
, "%016Lx",
852 (unsigned long long)(ne
->guid
));
854 ne
->class_dev
.dev
= &ne
->device
;
855 ne
->class_dev
.class = &nodemgr_ne_class
;
856 snprintf(ne
->class_dev
.class_id
, BUS_ID_SIZE
, "%016Lx",
857 (unsigned long long)(ne
->guid
));
859 if (device_register(&ne
->device
))
861 if (class_device_register(&ne
->class_dev
))
862 goto fail_classdevreg
;
863 get_device(&ne
->device
);
865 nodemgr_create_ne_dev_files(ne
);
867 nodemgr_update_bus_options(ne
);
869 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
870 (host
->node_id
== nodeid
) ? "Host" : "Node",
871 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
876 device_unregister(&ne
->device
);
880 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
881 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
887 static struct node_entry
*find_entry_by_guid(u64 guid
)
889 struct class_device
*cdev
;
890 struct node_entry
*ne
, *ret_ne
= NULL
;
892 down(&nodemgr_ne_class
.sem
);
893 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
894 ne
= container_of(cdev
, struct node_entry
, class_dev
);
896 if (ne
->guid
== guid
) {
901 up(&nodemgr_ne_class
.sem
);
907 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
910 struct class_device
*cdev
;
911 struct node_entry
*ne
, *ret_ne
= NULL
;
913 down(&nodemgr_ne_class
.sem
);
914 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
915 ne
= container_of(cdev
, struct node_entry
, class_dev
);
917 if (ne
->host
== host
&& ne
->nodeid
== nodeid
) {
922 up(&nodemgr_ne_class
.sem
);
928 static void nodemgr_register_device(struct node_entry
*ne
,
929 struct unit_directory
*ud
, struct device
*parent
)
931 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
934 ud
->device
.parent
= parent
;
936 snprintf(ud
->device
.bus_id
, BUS_ID_SIZE
, "%s-%u",
937 ne
->device
.bus_id
, ud
->id
);
939 ud
->class_dev
.dev
= &ud
->device
;
940 ud
->class_dev
.class = &nodemgr_ud_class
;
941 snprintf(ud
->class_dev
.class_id
, BUS_ID_SIZE
, "%s-%u",
942 ne
->device
.bus_id
, ud
->id
);
944 if (device_register(&ud
->device
))
946 if (class_device_register(&ud
->class_dev
))
947 goto fail_classdevreg
;
948 get_device(&ud
->device
);
950 nodemgr_create_ud_dev_files(ud
);
955 device_unregister(&ud
->device
);
957 HPSB_ERR("Failed to create unit %s", ud
->device
.bus_id
);
961 /* This implementation currently only scans the config rom and its
962 * immediate unit directories looking for software_id and
963 * software_version entries, in order to get driver autoloading working. */
964 static struct unit_directory
*nodemgr_process_unit_directory
965 (struct host_info
*hi
, struct node_entry
*ne
, struct csr1212_keyval
*ud_kv
,
966 unsigned int *id
, struct unit_directory
*parent
)
968 struct unit_directory
*ud
;
969 struct unit_directory
*ud_child
= NULL
;
970 struct csr1212_dentry
*dentry
;
971 struct csr1212_keyval
*kv
;
974 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
976 goto unit_directory_error
;
979 ud
->ignore_driver
= ignore_drivers
;
980 ud
->address
= ud_kv
->offset
+ CSR1212_CONFIG_ROM_SPACE_BASE
;
984 csr1212_for_each_dir_entry(ne
->csr
, kv
, ud_kv
, dentry
) {
985 switch (kv
->key
.id
) {
986 case CSR1212_KV_ID_VENDOR
:
987 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
988 ud
->vendor_id
= kv
->value
.immediate
;
989 ud
->flags
|= UNIT_DIRECTORY_VENDOR_ID
;
993 case CSR1212_KV_ID_MODEL
:
994 ud
->model_id
= kv
->value
.immediate
;
995 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
998 case CSR1212_KV_ID_SPECIFIER_ID
:
999 ud
->specifier_id
= kv
->value
.immediate
;
1000 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1003 case CSR1212_KV_ID_VERSION
:
1004 ud
->version
= kv
->value
.immediate
;
1005 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
1008 case CSR1212_KV_ID_DESCRIPTOR
:
1009 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1010 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1011 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1012 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1013 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1014 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1015 switch (last_key_id
) {
1016 case CSR1212_KV_ID_VENDOR
:
1017 ud
->vendor_name_kv
= kv
;
1018 csr1212_keep_keyval(kv
);
1021 case CSR1212_KV_ID_MODEL
:
1022 ud
->model_name_kv
= kv
;
1023 csr1212_keep_keyval(kv
);
1027 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1030 case CSR1212_KV_ID_DEPENDENT_INFO
:
1031 /* Logical Unit Number */
1032 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1033 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
) {
1034 ud_child
= kmemdup(ud
, sizeof(*ud_child
), GFP_KERNEL
);
1036 goto unit_directory_error
;
1037 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1042 ud
->lun
= kv
->value
.immediate
;
1043 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
1045 /* Logical Unit Directory */
1046 } else if (kv
->key
.type
== CSR1212_KV_TYPE_DIRECTORY
) {
1047 /* This should really be done in SBP2 as this is
1048 * doing SBP2 specific parsing.
1051 /* first register the parent unit */
1052 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN_DIRECTORY
;
1053 if (ud
->device
.bus
!= &ieee1394_bus_type
)
1054 nodemgr_register_device(ne
, ud
, &ne
->device
);
1056 /* process the child unit */
1057 ud_child
= nodemgr_process_unit_directory(hi
, ne
, kv
, id
, ud
);
1059 if (ud_child
== NULL
)
1062 /* inherit unspecified values, the driver core picks it up */
1063 if ((ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) &&
1064 !(ud_child
->flags
& UNIT_DIRECTORY_MODEL_ID
))
1066 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1067 ud_child
->model_id
= ud
->model_id
;
1069 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1070 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1072 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1073 ud_child
->specifier_id
= ud
->specifier_id
;
1075 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1076 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1078 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1079 ud_child
->version
= ud
->version
;
1082 /* register the child unit */
1083 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1084 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
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 host_info
*hi
, struct node_entry
*ne
)
1109 unsigned int ud_id
= 0;
1110 struct csr1212_dentry
*dentry
;
1111 struct csr1212_keyval
*kv
;
1114 ne
->needs_probe
= 0;
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(hi
, 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 ne
->vendor_name_kv
= kv
;
1139 csr1212_keep_keyval(kv
);
1144 last_key_id
= kv
->key
.id
;
1147 if (ne
->vendor_name_kv
&&
1148 device_create_file(&ne
->device
, &dev_attr_ne_vendor_name_kv
))
1152 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1153 (unsigned long long)ne
->guid
);
1156 #ifdef CONFIG_HOTPLUG
1158 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1159 char *buffer
, int buffer_size
)
1161 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(cdev
, struct unit_directory
, class_dev
);
1173 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1176 #define PUT_ENVP(fmt,val) \
1178 retval = add_uevent_var(envp, num_envp, &i, \
1179 buffer, buffer_size, &length, \
1185 PUT_ENVP("VENDOR_ID=%06x", ud
->vendor_id
);
1186 PUT_ENVP("MODEL_ID=%06x", ud
->model_id
);
1187 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud
->ne
->guid
);
1188 PUT_ENVP("SPECIFIER_ID=%06x", ud
->specifier_id
);
1189 PUT_ENVP("VERSION=%06x", ud
->version
);
1190 snprintf(buf
, sizeof(buf
), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1195 PUT_ENVP("MODALIAS=%s", buf
);
1206 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1207 char *buffer
, int buffer_size
)
1212 #endif /* CONFIG_HOTPLUG */
1215 int __hpsb_register_protocol(struct hpsb_protocol_driver
*drv
,
1216 struct module
*owner
)
1220 drv
->driver
.bus
= &ieee1394_bus_type
;
1221 drv
->driver
.owner
= owner
;
1222 drv
->driver
.name
= drv
->name
;
1224 /* This will cause a probe for devices */
1225 error
= driver_register(&drv
->driver
);
1227 nodemgr_create_drv_files(drv
);
1231 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
1233 nodemgr_remove_drv_files(driver
);
1234 /* This will subsequently disconnect all devices that our driver
1235 * is attached to. */
1236 driver_unregister(&driver
->driver
);
1241 * This function updates nodes that were present on the bus before the
1242 * reset and still are after the reset. The nodeid and the config rom
1243 * may have changed, and the drivers managing this device must be
1244 * informed that this device just went through a bus reset, to allow
1245 * the to take whatever actions required.
1247 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1248 struct host_info
*hi
, nodeid_t nodeid
,
1249 unsigned int generation
)
1251 if (ne
->nodeid
!= nodeid
) {
1252 HPSB_DEBUG("Node changed: " NODE_BUS_FMT
" -> " NODE_BUS_FMT
,
1253 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1254 NODE_BUS_ARGS(ne
->host
, nodeid
));
1255 ne
->nodeid
= nodeid
;
1258 if (ne
->busopt
.generation
!= ((be32_to_cpu(csr
->bus_info_data
[2]) >> 4) & 0xf)) {
1259 kfree(ne
->csr
->private);
1260 csr1212_destroy_csr(ne
->csr
);
1263 /* If the node's configrom generation has changed, we
1264 * unregister all the unit directories. */
1265 nodemgr_remove_uds(ne
);
1267 nodemgr_update_bus_options(ne
);
1269 /* Mark the node as new, so it gets re-probed */
1270 ne
->needs_probe
= 1;
1272 /* old cache is valid, so update its generation */
1273 struct nodemgr_csr_info
*ci
= ne
->csr
->private;
1274 ci
->generation
= generation
;
1275 /* free the partially filled now unneeded new cache */
1276 kfree(csr
->private);
1277 csr1212_destroy_csr(csr
);
1281 nodemgr_resume_ne(ne
);
1283 /* Mark the node current */
1284 ne
->generation
= generation
;
1289 static void nodemgr_node_scan_one(struct host_info
*hi
,
1290 nodeid_t nodeid
, int generation
)
1292 struct hpsb_host
*host
= hi
->host
;
1293 struct node_entry
*ne
;
1295 struct csr1212_csr
*csr
;
1296 struct nodemgr_csr_info
*ci
;
1299 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
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
, hi
, nodeid
, generation
);
1350 nodemgr_update_node(ne
, csr
, hi
, nodeid
, generation
);
1354 static void nodemgr_node_scan(struct host_info
*hi
, int generation
)
1357 struct hpsb_host
*host
= hi
->host
;
1358 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1359 nodeid_t nodeid
= LOCAL_BUS
;
1361 /* Scan each node on the bus */
1362 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1366 if (!sid
->link_active
) {
1370 nodemgr_node_scan_one(hi
, nodeid
++, generation
);
1375 static void nodemgr_suspend_ne(struct node_entry
*ne
)
1377 struct class_device
*cdev
;
1378 struct unit_directory
*ud
;
1380 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1381 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1384 WARN_ON(device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
));
1386 down(&nodemgr_ud_class
.sem
);
1387 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1388 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1392 if (ud
->device
.driver
&&
1393 (!ud
->device
.driver
->suspend
||
1394 ud
->device
.driver
->suspend(&ud
->device
, PMSG_SUSPEND
)))
1395 device_release_driver(&ud
->device
);
1397 up(&nodemgr_ud_class
.sem
);
1401 static void nodemgr_resume_ne(struct node_entry
*ne
)
1403 struct class_device
*cdev
;
1404 struct unit_directory
*ud
;
1407 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1409 down(&nodemgr_ud_class
.sem
);
1410 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1411 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1415 if (ud
->device
.driver
&& ud
->device
.driver
->resume
)
1416 ud
->device
.driver
->resume(&ud
->device
);
1418 up(&nodemgr_ud_class
.sem
);
1420 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1421 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1425 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1427 struct unit_directory
*ud
;
1428 struct hpsb_protocol_driver
*pdrv
;
1429 struct class_device
*cdev
;
1431 down(&nodemgr_ud_class
.sem
);
1432 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1433 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1437 if (ud
->device
.driver
) {
1438 pdrv
= container_of(ud
->device
.driver
,
1439 struct hpsb_protocol_driver
,
1441 if (pdrv
->update
&& pdrv
->update(ud
))
1442 device_release_driver(&ud
->device
);
1445 up(&nodemgr_ud_class
.sem
);
1449 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1450 * seems like an optional service but in the end it is practically mandatory
1451 * as a consequence of these clauses.
1453 * Note that we cannot do a broadcast write to all nodes at once because some
1454 * pre-1394a devices would hang. */
1455 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1457 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1458 quadlet_t bc_remote
, bc_local
;
1461 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1462 ne
->nodeid
== ne
->host
->node_id
)
1465 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1467 /* Check if the register is implemented and 1394a compliant. */
1468 error
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &bc_remote
,
1470 if (!error
&& bc_remote
& cpu_to_be32(0x80000000) &&
1471 bc_remote
!= bc_local
)
1472 hpsb_node_write(ne
, bc_addr
, &bc_local
, sizeof(bc_local
));
1476 static void nodemgr_probe_ne(struct host_info
*hi
, struct node_entry
*ne
, int generation
)
1480 if (ne
->host
!= hi
->host
|| ne
->in_limbo
)
1483 dev
= get_device(&ne
->device
);
1487 nodemgr_irm_write_bc(ne
, generation
);
1489 /* If "needs_probe", then this is either a new or changed node we
1490 * rescan totally. If the generation matches for an existing node
1491 * (one that existed prior to the bus reset) we send update calls
1492 * down to the drivers. Otherwise, this is a dead node and we
1494 if (ne
->needs_probe
)
1495 nodemgr_process_root_directory(hi
, ne
);
1496 else if (ne
->generation
== generation
)
1497 nodemgr_update_pdrv(ne
);
1499 nodemgr_suspend_ne(ne
);
1505 static void nodemgr_node_probe(struct host_info
*hi
, int generation
)
1507 struct hpsb_host
*host
= hi
->host
;
1508 struct class_device
*cdev
;
1509 struct node_entry
*ne
;
1511 /* Do some processing of the nodes we've probed. This pulls them
1512 * into the sysfs layer if needed, and can result in processing of
1513 * unit-directories, or just updating the node and it's
1516 * Run updates before probes. Usually, updates are time-critical
1517 * while probes are time-consuming. (Well, those probes need some
1518 * improvement...) */
1520 down(&nodemgr_ne_class
.sem
);
1521 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1522 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1523 if (!ne
->needs_probe
)
1524 nodemgr_probe_ne(hi
, ne
, generation
);
1526 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1527 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1528 if (ne
->needs_probe
)
1529 nodemgr_probe_ne(hi
, ne
, generation
);
1531 up(&nodemgr_ne_class
.sem
);
1534 /* If we had a bus reset while we were scanning the bus, it is
1535 * possible that we did not probe all nodes. In that case, we
1536 * skip the clean up for now, since we could remove nodes that
1537 * were still on the bus. Another bus scan is pending which will
1538 * do the clean up eventually.
1540 * Now let's tell the bus to rescan our devices. This may seem
1541 * like overhead, but the driver-model core will only scan a
1542 * device for a driver when either the device is added, or when a
1543 * new driver is added. A bus reset is a good reason to rescan
1544 * devices that were there before. For example, an sbp2 device
1545 * may become available for login, if the host that held it was
1548 if (generation
== get_hpsb_generation(host
))
1549 if (bus_rescan_devices(&ieee1394_bus_type
))
1550 HPSB_DEBUG("bus_rescan_devices had an error");
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 *__hi
)
1663 struct host_info
*hi
= (struct host_info
*)__hi
;
1664 struct hpsb_host
*host
= hi
->host
;
1665 unsigned int g
, generation
= 0;
1666 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 if (mutex_lock_interruptible(&nodemgr_serialize
)) {
1686 if (try_to_freeze())
1691 /* Pause for 1/4 second in 1/16 second intervals,
1692 * to make sure things settle down. */
1693 g
= get_hpsb_generation(host
);
1694 for (i
= 0; i
< 4 ; i
++) {
1695 if (msleep_interruptible(63) || kthread_should_stop())
1698 /* Now get the generation in which the node ID's we collect
1699 * are valid. During the bus scan we will use this generation
1700 * for the read transactions, so that if another reset occurs
1701 * during the scan the transactions will fail instead of
1702 * returning bogus data. */
1703 generation
= get_hpsb_generation(host
);
1705 /* If we get a reset before we are done waiting, then
1706 * start the the waiting over again */
1707 if (generation
!= g
)
1708 g
= generation
, i
= 0;
1711 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1712 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
1714 mutex_unlock(&nodemgr_serialize
);
1719 /* Scan our nodes to get the bus options and create node
1720 * entries. This does not do the sysfs stuff, since that
1721 * would trigger uevents and such, which is a bad idea at
1723 nodemgr_node_scan(hi
, generation
);
1725 /* This actually does the full probe, with sysfs
1727 nodemgr_node_probe(hi
, generation
);
1729 /* Update some of our sysfs symlinks */
1730 nodemgr_update_host_dev_links(host
);
1732 mutex_unlock(&nodemgr_serialize
);
1735 mutex_unlock(&nodemgr_serialize
);
1737 HPSB_VERBOSE("NodeMgr: Exiting thread");
1741 int nodemgr_for_each_host(void *__data
, int (*cb
)(struct hpsb_host
*, void *))
1743 struct class_device
*cdev
;
1744 struct hpsb_host
*host
;
1747 down(&hpsb_host_class
.sem
);
1748 list_for_each_entry(cdev
, &hpsb_host_class
.children
, node
) {
1749 host
= container_of(cdev
, struct hpsb_host
, class_dev
);
1751 if ((error
= cb(host
, __data
)))
1754 up(&hpsb_host_class
.sem
);
1759 /* The following two convenience functions use a struct node_entry
1760 * for addressing a node on the bus. They are intended for use by any
1761 * process context, not just the nodemgr thread, so we need to be a
1762 * little careful when reading out the node ID and generation. The
1763 * thing that can go wrong is that we get the node ID, then a bus
1764 * reset occurs, and then we read the generation. The node ID is
1765 * possibly invalid, but the generation is current, and we end up
1766 * sending a packet to a the wrong node.
1768 * The solution is to make sure we read the generation first, so that
1769 * if a reset occurs in the process, we end up with a stale generation
1770 * and the transactions will fail instead of silently using wrong node
1774 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*pkt
)
1776 pkt
->host
= ne
->host
;
1777 pkt
->generation
= ne
->generation
;
1779 pkt
->node_id
= ne
->nodeid
;
1782 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1783 quadlet_t
*buffer
, size_t length
)
1785 unsigned int generation
= ne
->generation
;
1788 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1789 addr
, buffer
, length
);
1792 static void nodemgr_add_host(struct hpsb_host
*host
)
1794 struct host_info
*hi
;
1796 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1798 HPSB_ERR("NodeMgr: out of memory in add host");
1802 hi
->thread
= kthread_run(nodemgr_host_thread
, hi
, "knodemgrd_%d",
1804 if (IS_ERR(hi
->thread
)) {
1805 HPSB_ERR("NodeMgr: cannot start thread for host %d", host
->id
);
1806 hpsb_destroy_hostinfo(&nodemgr_highlevel
, host
);
1810 static void nodemgr_host_reset(struct hpsb_host
*host
)
1812 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1815 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host
->id
);
1816 wake_up_process(hi
->thread
);
1820 static void nodemgr_remove_host(struct hpsb_host
*host
)
1822 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1825 kthread_stop(hi
->thread
);
1826 nodemgr_remove_host_dev(&host
->device
);
1830 static struct hpsb_highlevel nodemgr_highlevel
= {
1831 .name
= "Node manager",
1832 .add_host
= nodemgr_add_host
,
1833 .host_reset
= nodemgr_host_reset
,
1834 .remove_host
= nodemgr_remove_host
,
1837 int init_ieee1394_nodemgr(void)
1841 error
= class_register(&nodemgr_ne_class
);
1844 error
= class_register(&nodemgr_ud_class
);
1847 error
= driver_register(&nodemgr_mid_layer_driver
);
1850 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1851 nodemgr_dev_template_host
.driver
= &nodemgr_mid_layer_driver
;
1853 hpsb_register_highlevel(&nodemgr_highlevel
);
1857 class_unregister(&nodemgr_ud_class
);
1859 class_unregister(&nodemgr_ne_class
);
1864 void cleanup_ieee1394_nodemgr(void)
1866 hpsb_unregister_highlevel(&nodemgr_highlevel
);
1867 driver_unregister(&nodemgr_mid_layer_driver
);
1868 class_unregister(&nodemgr_ud_class
);
1869 class_unregister(&nodemgr_ne_class
);