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;
44 static char *nodemgr_find_oui_name(int oui
)
46 #ifdef CONFIG_IEEE1394_OUI_DB
47 extern struct oui_list_struct
{
53 for (i
= 0; oui_list
[i
].name
; i
++)
54 if (oui_list
[i
].oui
== oui
)
55 return oui_list
[i
].name
;
61 * Correct the speed map entry. This is necessary
62 * - for nodes with link speed < phy speed,
63 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
64 * A possible speed is determined by trial and error, using quadlet reads.
66 static int nodemgr_check_speed(struct nodemgr_csr_info
*ci
, u64 addr
,
70 u8 i
, *speed
, old_speed
, good_speed
;
73 speed
= &(ci
->host
->speed
[NODEID_TO_NODE(ci
->nodeid
)]);
75 good_speed
= IEEE1394_SPEED_MAX
+ 1;
77 /* Try every speed from S100 to old_speed.
78 * If we did it the other way around, a too low speed could be caught
79 * if the retry succeeded for some other reason, e.g. because the link
80 * just finished its initialization. */
81 for (i
= IEEE1394_SPEED_100
; i
<= old_speed
; i
++) {
83 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
84 &q
, sizeof(quadlet_t
));
90 if (good_speed
<= IEEE1394_SPEED_MAX
) {
91 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT
" yields %s",
92 NODE_BUS_ARGS(ci
->host
, ci
->nodeid
),
93 hpsb_speedto_str
[good_speed
]);
95 ci
->speed_unverified
= 0;
102 static int nodemgr_bus_read(struct csr1212_csr
*csr
, u64 addr
, u16 length
,
103 void *buffer
, void *__ci
)
105 struct nodemgr_csr_info
*ci
= (struct nodemgr_csr_info
*)__ci
;
109 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
112 ci
->speed_unverified
= 0;
115 /* Give up after 3rd failure. */
119 /* The ieee1394_core guessed the node's speed capability from
120 * the self ID. Check whether a lower speed works. */
121 if (ci
->speed_unverified
&& length
== sizeof(quadlet_t
)) {
122 error
= nodemgr_check_speed(ci
, addr
, buffer
);
126 if (msleep_interruptible(334))
132 static int nodemgr_get_max_rom(quadlet_t
*bus_info_data
, void *__ci
)
134 return (CSR1212_BE32_TO_CPU(bus_info_data
[2]) >> 8) & 0x3;
137 static struct csr1212_bus_ops nodemgr_csr_ops
= {
138 .bus_read
= nodemgr_bus_read
,
139 .get_max_rom
= nodemgr_get_max_rom
144 * Basically what we do here is start off retrieving the bus_info block.
145 * From there will fill in some info about the node, verify it is of IEEE
146 * 1394 type, and that the crc checks out ok. After that we start off with
147 * the root directory, and subdirectories. To do this, we retrieve the
148 * quadlet header for a directory, find out the length, and retrieve the
149 * complete directory entry (be it a leaf or a directory). We then process
150 * it and add the info to our structure for that particular node.
152 * We verify CRC's along the way for each directory/block/leaf. The entire
153 * node structure is generic, and simply stores the information in a way
154 * that's easy to parse by the protocol interface.
158 * The nodemgr relies heavily on the Driver Model for device callbacks and
159 * driver/device mappings. The old nodemgr used to handle all this itself,
160 * but now we are much simpler because of the LDM.
163 static DEFINE_MUTEX(nodemgr_serialize
);
166 struct hpsb_host
*host
;
167 struct list_head list
;
168 struct task_struct
*thread
;
171 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
);
172 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
173 char *buffer
, int buffer_size
);
174 static void nodemgr_resume_ne(struct node_entry
*ne
);
175 static void nodemgr_remove_ne(struct node_entry
*ne
);
176 static struct node_entry
*find_entry_by_guid(u64 guid
);
178 struct bus_type ieee1394_bus_type
= {
180 .match
= nodemgr_bus_match
,
183 static void host_cls_release(struct class_device
*class_dev
)
185 put_device(&container_of((class_dev
), struct hpsb_host
, class_dev
)->device
);
188 struct class hpsb_host_class
= {
189 .name
= "ieee1394_host",
190 .release
= host_cls_release
,
193 static void ne_cls_release(struct class_device
*class_dev
)
195 put_device(&container_of((class_dev
), struct node_entry
, class_dev
)->device
);
198 static struct class nodemgr_ne_class
= {
199 .name
= "ieee1394_node",
200 .release
= ne_cls_release
,
203 static void ud_cls_release(struct class_device
*class_dev
)
205 put_device(&container_of((class_dev
), struct unit_directory
, class_dev
)->device
);
208 /* The name here is only so that unit directory hotplug works with old
209 * style hotplug, which only ever did unit directories anyway. */
210 static struct class nodemgr_ud_class
= {
212 .release
= ud_cls_release
,
213 .uevent
= nodemgr_uevent
,
216 static struct hpsb_highlevel nodemgr_highlevel
;
219 static void nodemgr_release_ud(struct device
*dev
)
221 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
223 if (ud
->vendor_name_kv
)
224 csr1212_release_keyval(ud
->vendor_name_kv
);
225 if (ud
->model_name_kv
)
226 csr1212_release_keyval(ud
->model_name_kv
);
231 static void nodemgr_release_ne(struct device
*dev
)
233 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
235 if (ne
->vendor_name_kv
)
236 csr1212_release_keyval(ne
->vendor_name_kv
);
242 static void nodemgr_release_host(struct device
*dev
)
244 struct hpsb_host
*host
= container_of(dev
, struct hpsb_host
, device
);
246 csr1212_destroy_csr(host
->csr
.rom
);
251 static int nodemgr_ud_platform_data
;
253 static struct device nodemgr_dev_template_ud
= {
254 .bus
= &ieee1394_bus_type
,
255 .release
= nodemgr_release_ud
,
256 .platform_data
= &nodemgr_ud_platform_data
,
259 static struct device nodemgr_dev_template_ne
= {
260 .bus
= &ieee1394_bus_type
,
261 .release
= nodemgr_release_ne
,
264 /* This dummy driver prevents the host devices from being scanned. We have no
265 * useful drivers for them yet, and there would be a deadlock possible if the
266 * driver core scans the host device while the host's low-level driver (i.e.
267 * the host's parent device) is being removed. */
268 static struct device_driver nodemgr_mid_layer_driver
= {
269 .bus
= &ieee1394_bus_type
,
271 .owner
= THIS_MODULE
,
274 struct device nodemgr_dev_template_host
= {
275 .bus
= &ieee1394_bus_type
,
276 .release
= nodemgr_release_host
,
277 .driver
= &nodemgr_mid_layer_driver
,
281 #define fw_attr(class, class_type, field, type, format_string) \
282 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
285 class = container_of(dev, class_type, device); \
286 return sprintf(buf, format_string, (type)class->field); \
288 static struct device_attribute dev_attr_##class##_##field = { \
289 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
290 .show = fw_show_##class##_##field, \
293 #define fw_attr_td(class, class_type, td_kv) \
294 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
297 class_type *class = container_of(dev, class_type, device); \
298 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
300 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
302 while ((buf + len - 1) == '\0') \
308 static struct device_attribute dev_attr_##class##_##td_kv = { \
309 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
310 .show = fw_show_##class##_##td_kv, \
314 #define fw_drv_attr(field, type, format_string) \
315 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
317 struct hpsb_protocol_driver *driver; \
318 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
319 return sprintf(buf, format_string, (type)driver->field);\
321 static struct driver_attribute driver_attr_drv_##field = { \
322 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
323 .show = fw_drv_show_##field, \
327 static ssize_t
fw_show_ne_bus_options(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
329 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
331 return sprintf(buf
, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
332 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
334 ne
->busopt
.cmc
, ne
->busopt
.isc
, ne
->busopt
.bmc
,
335 ne
->busopt
.pmc
, ne
->busopt
.generation
, ne
->busopt
.lnkspd
,
338 ne
->busopt
.cyc_clk_acc
);
340 static DEVICE_ATTR(bus_options
,S_IRUGO
,fw_show_ne_bus_options
,NULL
);
343 #ifdef HPSB_DEBUG_TLABELS
344 static ssize_t
fw_show_ne_tlabels_free(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 tf
= 64 - bitmap_weight(tp
, 64);
354 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
356 return sprintf(buf
, "%d\n", tf
);
358 static DEVICE_ATTR(tlabels_free
,S_IRUGO
,fw_show_ne_tlabels_free
,NULL
);
361 static ssize_t
fw_show_ne_tlabels_mask(struct device
*dev
,
362 struct device_attribute
*attr
, char *buf
)
364 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
366 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
369 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
370 #if (BITS_PER_LONG <= 32)
371 tm
= ((u64
)tp
[0] << 32) + tp
[1];
375 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
377 return sprintf(buf
, "0x%016llx\n", (unsigned long long)tm
);
379 static DEVICE_ATTR(tlabels_mask
, S_IRUGO
, fw_show_ne_tlabels_mask
, NULL
);
380 #endif /* HPSB_DEBUG_TLABELS */
383 static ssize_t
fw_set_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
385 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
386 int state
= simple_strtoul(buf
, NULL
, 10);
389 ud
->ignore_driver
= 1;
390 down_write(&ieee1394_bus_type
.subsys
.rwsem
);
391 device_release_driver(dev
);
392 up_write(&ieee1394_bus_type
.subsys
.rwsem
);
393 } else if (state
== 0)
394 ud
->ignore_driver
= 0;
398 static ssize_t
fw_get_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
400 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
402 return sprintf(buf
, "%d\n", ud
->ignore_driver
);
404 static DEVICE_ATTR(ignore_driver
, S_IWUSR
| S_IRUGO
, fw_get_ignore_driver
, fw_set_ignore_driver
);
407 static ssize_t
fw_set_destroy_node(struct bus_type
*bus
, const char *buf
, size_t count
)
409 struct node_entry
*ne
;
410 u64 guid
= (u64
)simple_strtoull(buf
, NULL
, 16);
412 ne
= find_entry_by_guid(guid
);
414 if (ne
== NULL
|| !ne
->in_limbo
)
417 nodemgr_remove_ne(ne
);
421 static ssize_t
fw_get_destroy_node(struct bus_type
*bus
, char *buf
)
423 return sprintf(buf
, "You can destroy in_limbo nodes by writing their GUID to this file\n");
425 static BUS_ATTR(destroy_node
, S_IWUSR
| S_IRUGO
, fw_get_destroy_node
, fw_set_destroy_node
);
428 static ssize_t
fw_set_rescan(struct bus_type
*bus
, const char *buf
,
433 if (simple_strtoul(buf
, NULL
, 10) == 1)
434 error
= bus_rescan_devices(&ieee1394_bus_type
);
435 return error
? error
: count
;
437 static ssize_t
fw_get_rescan(struct bus_type
*bus
, char *buf
)
439 return sprintf(buf
, "You can force a rescan of the bus for "
440 "drivers by writing a 1 to this file\n");
442 static BUS_ATTR(rescan
, S_IWUSR
| S_IRUGO
, fw_get_rescan
, fw_set_rescan
);
445 static ssize_t
fw_set_ignore_drivers(struct bus_type
*bus
, const char *buf
, size_t count
)
447 int state
= simple_strtoul(buf
, NULL
, 10);
456 static ssize_t
fw_get_ignore_drivers(struct bus_type
*bus
, char *buf
)
458 return sprintf(buf
, "%d\n", ignore_drivers
);
460 static BUS_ATTR(ignore_drivers
, S_IWUSR
| S_IRUGO
, fw_get_ignore_drivers
, fw_set_ignore_drivers
);
463 struct bus_attribute
*const fw_bus_attrs
[] = {
464 &bus_attr_destroy_node
,
466 &bus_attr_ignore_drivers
,
471 fw_attr(ne
, struct node_entry
, capabilities
, unsigned int, "0x%06x\n")
472 fw_attr(ne
, struct node_entry
, nodeid
, unsigned int, "0x%04x\n")
474 fw_attr(ne
, struct node_entry
, vendor_id
, unsigned int, "0x%06x\n")
475 fw_attr_td(ne
, struct node_entry
, vendor_name_kv
)
476 fw_attr(ne
, struct node_entry
, vendor_oui
, const char *, "%s\n")
478 fw_attr(ne
, struct node_entry
, guid
, unsigned long long, "0x%016Lx\n")
479 fw_attr(ne
, struct node_entry
, guid_vendor_id
, unsigned int, "0x%06x\n")
480 fw_attr(ne
, struct node_entry
, guid_vendor_oui
, const char *, "%s\n")
481 fw_attr(ne
, struct node_entry
, in_limbo
, int, "%d\n");
483 static struct device_attribute
*const fw_ne_attrs
[] = {
485 &dev_attr_ne_guid_vendor_id
,
486 &dev_attr_ne_capabilities
,
487 &dev_attr_ne_vendor_id
,
489 &dev_attr_bus_options
,
490 #ifdef HPSB_DEBUG_TLABELS
491 &dev_attr_tlabels_free
,
492 &dev_attr_tlabels_mask
,
498 fw_attr(ud
, struct unit_directory
, address
, unsigned long long, "0x%016Lx\n")
499 fw_attr(ud
, struct unit_directory
, length
, int, "%d\n")
500 /* These are all dependent on the value being provided */
501 fw_attr(ud
, struct unit_directory
, vendor_id
, unsigned int, "0x%06x\n")
502 fw_attr(ud
, struct unit_directory
, model_id
, unsigned int, "0x%06x\n")
503 fw_attr(ud
, struct unit_directory
, specifier_id
, unsigned int, "0x%06x\n")
504 fw_attr(ud
, struct unit_directory
, version
, unsigned int, "0x%06x\n")
505 fw_attr_td(ud
, struct unit_directory
, vendor_name_kv
)
506 fw_attr(ud
, struct unit_directory
, vendor_oui
, const char *, "%s\n")
507 fw_attr_td(ud
, struct unit_directory
, model_name_kv
)
509 static struct device_attribute
*const fw_ud_attrs
[] = {
510 &dev_attr_ud_address
,
512 &dev_attr_ignore_driver
,
516 fw_attr(host
, struct hpsb_host
, node_count
, int, "%d\n")
517 fw_attr(host
, struct hpsb_host
, selfid_count
, int, "%d\n")
518 fw_attr(host
, struct hpsb_host
, nodes_active
, int, "%d\n")
519 fw_attr(host
, struct hpsb_host
, in_bus_reset
, int, "%d\n")
520 fw_attr(host
, struct hpsb_host
, is_root
, int, "%d\n")
521 fw_attr(host
, struct hpsb_host
, is_cycmst
, int, "%d\n")
522 fw_attr(host
, struct hpsb_host
, is_irm
, int, "%d\n")
523 fw_attr(host
, struct hpsb_host
, is_busmgr
, int, "%d\n")
525 static struct device_attribute
*const fw_host_attrs
[] = {
526 &dev_attr_host_node_count
,
527 &dev_attr_host_selfid_count
,
528 &dev_attr_host_nodes_active
,
529 &dev_attr_host_in_bus_reset
,
530 &dev_attr_host_is_root
,
531 &dev_attr_host_is_cycmst
,
532 &dev_attr_host_is_irm
,
533 &dev_attr_host_is_busmgr
,
537 static ssize_t
fw_show_drv_device_ids(struct device_driver
*drv
, char *buf
)
539 struct hpsb_protocol_driver
*driver
;
540 struct ieee1394_device_id
*id
;
544 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
546 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
549 if (id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) {
550 length
+= sprintf(scratch
, "vendor_id=0x%06x", id
->vendor_id
);
551 scratch
= buf
+ length
;
555 if (id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) {
556 length
+= sprintf(scratch
, "%smodel_id=0x%06x",
557 need_coma
++ ? "," : "",
559 scratch
= buf
+ length
;
562 if (id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) {
563 length
+= sprintf(scratch
, "%sspecifier_id=0x%06x",
564 need_coma
++ ? "," : "",
566 scratch
= buf
+ length
;
569 if (id
->match_flags
& IEEE1394_MATCH_VERSION
) {
570 length
+= sprintf(scratch
, "%sversion=0x%06x",
571 need_coma
++ ? "," : "",
573 scratch
= buf
+ length
;
584 static DRIVER_ATTR(device_ids
,S_IRUGO
,fw_show_drv_device_ids
,NULL
);
587 fw_drv_attr(name
, const char *, "%s\n")
589 static struct driver_attribute
*const fw_drv_attrs
[] = {
590 &driver_attr_drv_name
,
591 &driver_attr_device_ids
,
595 static void nodemgr_create_drv_files(struct hpsb_protocol_driver
*driver
)
597 struct device_driver
*drv
= &driver
->driver
;
600 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
601 if (driver_create_file(drv
, fw_drv_attrs
[i
]))
605 HPSB_ERR("Failed to add sysfs attribute for driver %s", driver
->name
);
609 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver
*driver
)
611 struct device_driver
*drv
= &driver
->driver
;
614 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
615 driver_remove_file(drv
, fw_drv_attrs
[i
]);
619 static void nodemgr_create_ne_dev_files(struct node_entry
*ne
)
621 struct device
*dev
= &ne
->device
;
624 for (i
= 0; i
< ARRAY_SIZE(fw_ne_attrs
); i
++)
625 if (device_create_file(dev
, fw_ne_attrs
[i
]))
629 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
630 (unsigned long long)ne
->guid
);
634 static void nodemgr_create_host_dev_files(struct hpsb_host
*host
)
636 struct device
*dev
= &host
->device
;
639 for (i
= 0; i
< ARRAY_SIZE(fw_host_attrs
); i
++)
640 if (device_create_file(dev
, fw_host_attrs
[i
]))
644 HPSB_ERR("Failed to add sysfs attribute for host %d", host
->id
);
648 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
651 static void nodemgr_update_host_dev_links(struct hpsb_host
*host
)
653 struct device
*dev
= &host
->device
;
654 struct node_entry
*ne
;
656 sysfs_remove_link(&dev
->kobj
, "irm_id");
657 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
658 sysfs_remove_link(&dev
->kobj
, "host_id");
660 if ((ne
= find_entry_by_nodeid(host
, host
->irm_id
)) &&
661 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "irm_id"))
663 if ((ne
= find_entry_by_nodeid(host
, host
->busmgr_id
)) &&
664 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "busmgr_id"))
666 if ((ne
= find_entry_by_nodeid(host
, host
->node_id
)) &&
667 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "host_id"))
671 HPSB_ERR("Failed to update sysfs attributes for host %d", host
->id
);
674 static void nodemgr_create_ud_dev_files(struct unit_directory
*ud
)
676 struct device
*dev
= &ud
->device
;
679 for (i
= 0; i
< ARRAY_SIZE(fw_ud_attrs
); i
++)
680 if (device_create_file(dev
, fw_ud_attrs
[i
]))
682 if (ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
)
683 if (device_create_file(dev
, &dev_attr_ud_specifier_id
))
685 if (ud
->flags
& UNIT_DIRECTORY_VERSION
)
686 if (device_create_file(dev
, &dev_attr_ud_version
))
688 if (ud
->flags
& UNIT_DIRECTORY_VENDOR_ID
) {
689 if (device_create_file(dev
, &dev_attr_ud_vendor_id
))
691 if (ud
->vendor_name_kv
&&
692 device_create_file(dev
, &dev_attr_ud_vendor_name_kv
))
695 if (ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) {
696 if (device_create_file(dev
, &dev_attr_ud_model_id
))
698 if (ud
->model_name_kv
&&
699 device_create_file(dev
, &dev_attr_ud_model_name_kv
))
704 HPSB_ERR("Failed to add sysfs attributes for unit %s",
709 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
)
711 struct hpsb_protocol_driver
*driver
;
712 struct unit_directory
*ud
;
713 struct ieee1394_device_id
*id
;
715 /* We only match unit directories */
716 if (dev
->platform_data
!= &nodemgr_ud_platform_data
)
719 ud
= container_of(dev
, struct unit_directory
, device
);
720 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
723 /* We only match drivers of type hpsb_protocol_driver */
724 if (drv
== &nodemgr_mid_layer_driver
)
727 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
728 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
729 if ((id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) &&
730 id
->vendor_id
!= ud
->vendor_id
)
733 if ((id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) &&
734 id
->model_id
!= ud
->model_id
)
737 if ((id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) &&
738 id
->specifier_id
!= ud
->specifier_id
)
741 if ((id
->match_flags
& IEEE1394_MATCH_VERSION
) &&
742 id
->version
!= ud
->version
)
752 static DEFINE_MUTEX(nodemgr_serialize_remove_uds
);
754 static void nodemgr_remove_uds(struct node_entry
*ne
)
756 struct class_device
*cdev
;
757 struct unit_directory
*ud
, **unreg
;
762 * Iteration over nodemgr_ud_class.children has to be protected by
763 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
764 * take nodemgr_ud_class.sem too. Therefore store all uds to be
765 * unregistered in a temporary array, release the semaphore, and then
766 * unregister the uds.
768 * Since nodemgr_remove_uds can also run in other contexts than the
769 * knodemgrds (which are currently globally serialized), protect the
770 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
773 mutex_lock(&nodemgr_serialize_remove_uds
);
775 down(&nodemgr_ud_class
.sem
);
777 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
778 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
783 up(&nodemgr_ud_class
.sem
);
784 mutex_unlock(&nodemgr_serialize_remove_uds
);
787 unreg
= kcalloc(count
, sizeof(*unreg
), GFP_KERNEL
);
789 HPSB_ERR("NodeMgr: out of memory in nodemgr_remove_uds");
790 up(&nodemgr_ud_class
.sem
);
791 mutex_unlock(&nodemgr_serialize_remove_uds
);
795 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
796 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
802 up(&nodemgr_ud_class
.sem
);
804 for (i
= 0; i
< count
; i
++) {
805 class_device_unregister(&unreg
[i
]->class_dev
);
806 device_unregister(&unreg
[i
]->device
);
810 mutex_unlock(&nodemgr_serialize_remove_uds
);
814 static void nodemgr_remove_ne(struct node_entry
*ne
)
818 dev
= get_device(&ne
->device
);
822 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
823 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
825 nodemgr_remove_uds(ne
);
827 class_device_unregister(&ne
->class_dev
);
828 device_unregister(dev
);
833 static int __nodemgr_remove_host_dev(struct device
*dev
, void *data
)
835 nodemgr_remove_ne(container_of(dev
, struct node_entry
, device
));
839 static void nodemgr_remove_host_dev(struct device
*dev
)
841 WARN_ON(device_for_each_child(dev
, NULL
, __nodemgr_remove_host_dev
));
842 sysfs_remove_link(&dev
->kobj
, "irm_id");
843 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
844 sysfs_remove_link(&dev
->kobj
, "host_id");
848 static void nodemgr_update_bus_options(struct node_entry
*ne
)
850 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
851 static const u16 mr
[] = { 4, 64, 1024, 0};
853 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
855 ne
->busopt
.irmc
= (busoptions
>> 31) & 1;
856 ne
->busopt
.cmc
= (busoptions
>> 30) & 1;
857 ne
->busopt
.isc
= (busoptions
>> 29) & 1;
858 ne
->busopt
.bmc
= (busoptions
>> 28) & 1;
859 ne
->busopt
.pmc
= (busoptions
>> 27) & 1;
860 ne
->busopt
.cyc_clk_acc
= (busoptions
>> 16) & 0xff;
861 ne
->busopt
.max_rec
= 1 << (((busoptions
>> 12) & 0xf) + 1);
862 ne
->busopt
.max_rom
= (busoptions
>> 8) & 0x3;
863 ne
->busopt
.generation
= (busoptions
>> 4) & 0xf;
864 ne
->busopt
.lnkspd
= busoptions
& 0x7;
866 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
867 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
868 busoptions
, ne
->busopt
.irmc
, ne
->busopt
.cmc
,
869 ne
->busopt
.isc
, ne
->busopt
.bmc
, ne
->busopt
.pmc
,
870 ne
->busopt
.cyc_clk_acc
, ne
->busopt
.max_rec
,
871 mr
[ne
->busopt
.max_rom
],
872 ne
->busopt
.generation
, ne
->busopt
.lnkspd
);
876 static struct node_entry
*nodemgr_create_node(octlet_t guid
, struct csr1212_csr
*csr
,
877 struct host_info
*hi
, nodeid_t nodeid
,
878 unsigned int generation
)
880 struct hpsb_host
*host
= hi
->host
;
881 struct node_entry
*ne
;
883 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
889 ne
->generation
= generation
;
893 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
894 ne
->guid_vendor_oui
= nodemgr_find_oui_name(ne
->guid_vendor_id
);
897 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
899 ne
->device
.parent
= &host
->device
;
900 snprintf(ne
->device
.bus_id
, BUS_ID_SIZE
, "%016Lx",
901 (unsigned long long)(ne
->guid
));
903 ne
->class_dev
.dev
= &ne
->device
;
904 ne
->class_dev
.class = &nodemgr_ne_class
;
905 snprintf(ne
->class_dev
.class_id
, BUS_ID_SIZE
, "%016Lx",
906 (unsigned long long)(ne
->guid
));
908 if (device_register(&ne
->device
))
910 if (class_device_register(&ne
->class_dev
))
911 goto fail_classdevreg
;
912 get_device(&ne
->device
);
914 if (ne
->guid_vendor_oui
&&
915 device_create_file(&ne
->device
, &dev_attr_ne_guid_vendor_oui
))
917 nodemgr_create_ne_dev_files(ne
);
919 nodemgr_update_bus_options(ne
);
921 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
922 (host
->node_id
== nodeid
) ? "Host" : "Node",
923 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
928 put_device(&ne
->device
);
930 device_unregister(&ne
->device
);
934 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
935 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
941 static struct node_entry
*find_entry_by_guid(u64 guid
)
943 struct class_device
*cdev
;
944 struct node_entry
*ne
, *ret_ne
= NULL
;
946 down(&nodemgr_ne_class
.sem
);
947 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
948 ne
= container_of(cdev
, struct node_entry
, class_dev
);
950 if (ne
->guid
== guid
) {
955 up(&nodemgr_ne_class
.sem
);
961 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
964 struct class_device
*cdev
;
965 struct node_entry
*ne
, *ret_ne
= NULL
;
967 down(&nodemgr_ne_class
.sem
);
968 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
969 ne
= container_of(cdev
, struct node_entry
, class_dev
);
971 if (ne
->host
== host
&& ne
->nodeid
== nodeid
) {
976 up(&nodemgr_ne_class
.sem
);
982 static void nodemgr_register_device(struct node_entry
*ne
,
983 struct unit_directory
*ud
, struct device
*parent
)
985 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
988 ud
->device
.parent
= parent
;
990 snprintf(ud
->device
.bus_id
, BUS_ID_SIZE
, "%s-%u",
991 ne
->device
.bus_id
, ud
->id
);
993 ud
->class_dev
.dev
= &ud
->device
;
994 ud
->class_dev
.class = &nodemgr_ud_class
;
995 snprintf(ud
->class_dev
.class_id
, BUS_ID_SIZE
, "%s-%u",
996 ne
->device
.bus_id
, ud
->id
);
998 if (device_register(&ud
->device
))
1000 if (class_device_register(&ud
->class_dev
))
1001 goto fail_classdevreg
;
1002 get_device(&ud
->device
);
1004 if (ud
->vendor_oui
&&
1005 device_create_file(&ud
->device
, &dev_attr_ud_vendor_oui
))
1007 nodemgr_create_ud_dev_files(ud
);
1012 put_device(&ud
->device
);
1014 device_unregister(&ud
->device
);
1016 HPSB_ERR("Failed to create unit %s", ud
->device
.bus_id
);
1020 /* This implementation currently only scans the config rom and its
1021 * immediate unit directories looking for software_id and
1022 * software_version entries, in order to get driver autoloading working. */
1023 static struct unit_directory
*nodemgr_process_unit_directory
1024 (struct host_info
*hi
, struct node_entry
*ne
, struct csr1212_keyval
*ud_kv
,
1025 unsigned int *id
, struct unit_directory
*parent
)
1027 struct unit_directory
*ud
;
1028 struct unit_directory
*ud_child
= NULL
;
1029 struct csr1212_dentry
*dentry
;
1030 struct csr1212_keyval
*kv
;
1033 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
1035 goto unit_directory_error
;
1038 ud
->ignore_driver
= ignore_drivers
;
1039 ud
->address
= ud_kv
->offset
+ CSR1212_CONFIG_ROM_SPACE_BASE
;
1043 csr1212_for_each_dir_entry(ne
->csr
, kv
, ud_kv
, dentry
) {
1044 switch (kv
->key
.id
) {
1045 case CSR1212_KV_ID_VENDOR
:
1046 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1047 ud
->vendor_id
= kv
->value
.immediate
;
1048 ud
->flags
|= UNIT_DIRECTORY_VENDOR_ID
;
1051 ud
->vendor_oui
= nodemgr_find_oui_name(ud
->vendor_id
);
1055 case CSR1212_KV_ID_MODEL
:
1056 ud
->model_id
= kv
->value
.immediate
;
1057 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1060 case CSR1212_KV_ID_SPECIFIER_ID
:
1061 ud
->specifier_id
= kv
->value
.immediate
;
1062 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1065 case CSR1212_KV_ID_VERSION
:
1066 ud
->version
= kv
->value
.immediate
;
1067 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
1070 case CSR1212_KV_ID_DESCRIPTOR
:
1071 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1072 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1073 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1074 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1075 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1076 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1077 switch (last_key_id
) {
1078 case CSR1212_KV_ID_VENDOR
:
1079 ud
->vendor_name_kv
= kv
;
1080 csr1212_keep_keyval(kv
);
1083 case CSR1212_KV_ID_MODEL
:
1084 ud
->model_name_kv
= kv
;
1085 csr1212_keep_keyval(kv
);
1089 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1092 case CSR1212_KV_ID_DEPENDENT_INFO
:
1093 /* Logical Unit Number */
1094 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1095 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
) {
1096 ud_child
= kmemdup(ud
, sizeof(*ud_child
), GFP_KERNEL
);
1098 goto unit_directory_error
;
1099 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1104 ud
->lun
= kv
->value
.immediate
;
1105 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
1107 /* Logical Unit Directory */
1108 } else if (kv
->key
.type
== CSR1212_KV_TYPE_DIRECTORY
) {
1109 /* This should really be done in SBP2 as this is
1110 * doing SBP2 specific parsing.
1113 /* first register the parent unit */
1114 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN_DIRECTORY
;
1115 if (ud
->device
.bus
!= &ieee1394_bus_type
)
1116 nodemgr_register_device(ne
, ud
, &ne
->device
);
1118 /* process the child unit */
1119 ud_child
= nodemgr_process_unit_directory(hi
, ne
, kv
, id
, ud
);
1121 if (ud_child
== NULL
)
1124 /* inherit unspecified values, the driver core picks it up */
1125 if ((ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) &&
1126 !(ud_child
->flags
& UNIT_DIRECTORY_MODEL_ID
))
1128 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1129 ud_child
->model_id
= ud
->model_id
;
1131 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1132 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1134 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1135 ud_child
->specifier_id
= ud
->specifier_id
;
1137 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1138 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1140 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1141 ud_child
->version
= ud
->version
;
1144 /* register the child unit */
1145 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1146 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
1154 last_key_id
= kv
->key
.id
;
1157 /* do not process child units here and only if not already registered */
1158 if (!parent
&& ud
->device
.bus
!= &ieee1394_bus_type
)
1159 nodemgr_register_device(ne
, ud
, &ne
->device
);
1163 unit_directory_error
:
1169 static void nodemgr_process_root_directory(struct host_info
*hi
, struct node_entry
*ne
)
1171 unsigned int ud_id
= 0;
1172 struct csr1212_dentry
*dentry
;
1173 struct csr1212_keyval
*kv
;
1176 ne
->needs_probe
= 0;
1178 csr1212_for_each_dir_entry(ne
->csr
, kv
, ne
->csr
->root_kv
, dentry
) {
1179 switch (kv
->key
.id
) {
1180 case CSR1212_KV_ID_VENDOR
:
1181 ne
->vendor_id
= kv
->value
.immediate
;
1184 ne
->vendor_oui
= nodemgr_find_oui_name(ne
->vendor_id
);
1187 case CSR1212_KV_ID_NODE_CAPABILITIES
:
1188 ne
->capabilities
= kv
->value
.immediate
;
1191 case CSR1212_KV_ID_UNIT
:
1192 nodemgr_process_unit_directory(hi
, ne
, kv
, &ud_id
, NULL
);
1195 case CSR1212_KV_ID_DESCRIPTOR
:
1196 if (last_key_id
== CSR1212_KV_ID_VENDOR
) {
1197 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1198 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1199 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1200 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1201 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1202 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1203 ne
->vendor_name_kv
= kv
;
1204 csr1212_keep_keyval(kv
);
1209 last_key_id
= kv
->key
.id
;
1212 if (ne
->vendor_oui
&&
1213 device_create_file(&ne
->device
, &dev_attr_ne_vendor_oui
))
1215 if (ne
->vendor_name_kv
&&
1216 device_create_file(&ne
->device
, &dev_attr_ne_vendor_name_kv
))
1220 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1221 (unsigned long long)ne
->guid
);
1224 #ifdef CONFIG_HOTPLUG
1226 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1227 char *buffer
, int buffer_size
)
1229 struct unit_directory
*ud
;
1232 /* ieee1394:venNmoNspNverN */
1233 char buf
[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1238 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1240 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1243 #define PUT_ENVP(fmt,val) \
1246 envp[i++] = buffer; \
1247 printed = snprintf(buffer, buffer_size - length, \
1249 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1251 length += printed+1; \
1252 buffer += printed+1; \
1255 PUT_ENVP("VENDOR_ID=%06x", ud
->vendor_id
);
1256 PUT_ENVP("MODEL_ID=%06x", ud
->model_id
);
1257 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud
->ne
->guid
);
1258 PUT_ENVP("SPECIFIER_ID=%06x", ud
->specifier_id
);
1259 PUT_ENVP("VERSION=%06x", ud
->version
);
1260 snprintf(buf
, sizeof(buf
), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1265 PUT_ENVP("MODALIAS=%s", buf
);
1276 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1277 char *buffer
, int buffer_size
)
1282 #endif /* CONFIG_HOTPLUG */
1285 int hpsb_register_protocol(struct hpsb_protocol_driver
*driver
)
1287 /* This will cause a probe for devices */
1288 int error
= driver_register(&driver
->driver
);
1290 nodemgr_create_drv_files(driver
);
1294 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
1296 nodemgr_remove_drv_files(driver
);
1297 /* This will subsequently disconnect all devices that our driver
1298 * is attached to. */
1299 driver_unregister(&driver
->driver
);
1304 * This function updates nodes that were present on the bus before the
1305 * reset and still are after the reset. The nodeid and the config rom
1306 * may have changed, and the drivers managing this device must be
1307 * informed that this device just went through a bus reset, to allow
1308 * the to take whatever actions required.
1310 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1311 struct host_info
*hi
, nodeid_t nodeid
,
1312 unsigned int generation
)
1314 if (ne
->nodeid
!= nodeid
) {
1315 HPSB_DEBUG("Node changed: " NODE_BUS_FMT
" -> " NODE_BUS_FMT
,
1316 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1317 NODE_BUS_ARGS(ne
->host
, nodeid
));
1318 ne
->nodeid
= nodeid
;
1321 if (ne
->busopt
.generation
!= ((be32_to_cpu(csr
->bus_info_data
[2]) >> 4) & 0xf)) {
1322 kfree(ne
->csr
->private);
1323 csr1212_destroy_csr(ne
->csr
);
1326 /* If the node's configrom generation has changed, we
1327 * unregister all the unit directories. */
1328 nodemgr_remove_uds(ne
);
1330 nodemgr_update_bus_options(ne
);
1332 /* Mark the node as new, so it gets re-probed */
1333 ne
->needs_probe
= 1;
1335 /* old cache is valid, so update its generation */
1336 struct nodemgr_csr_info
*ci
= ne
->csr
->private;
1337 ci
->generation
= generation
;
1338 /* free the partially filled now unneeded new cache */
1339 kfree(csr
->private);
1340 csr1212_destroy_csr(csr
);
1344 nodemgr_resume_ne(ne
);
1346 /* Mark the node current */
1347 ne
->generation
= generation
;
1352 static void nodemgr_node_scan_one(struct host_info
*hi
,
1353 nodeid_t nodeid
, int generation
)
1355 struct hpsb_host
*host
= hi
->host
;
1356 struct node_entry
*ne
;
1358 struct csr1212_csr
*csr
;
1359 struct nodemgr_csr_info
*ci
;
1362 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
1367 ci
->nodeid
= nodeid
;
1368 ci
->generation
= generation
;
1370 /* Prepare for speed probe which occurs when reading the ROM */
1371 speed
= &(host
->speed
[NODEID_TO_NODE(nodeid
)]);
1372 if (*speed
> host
->csr
.lnk_spd
)
1373 *speed
= host
->csr
.lnk_spd
;
1374 ci
->speed_unverified
= *speed
> IEEE1394_SPEED_100
;
1376 /* We need to detect when the ConfigROM's generation has changed,
1377 * so we only update the node's info when it needs to be. */
1379 csr
= csr1212_create_csr(&nodemgr_csr_ops
, 5 * sizeof(quadlet_t
), ci
);
1380 if (!csr
|| csr1212_parse_csr(csr
) != CSR1212_SUCCESS
) {
1381 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT
,
1382 NODE_BUS_ARGS(host
, nodeid
));
1384 csr1212_destroy_csr(csr
);
1389 if (csr
->bus_info_data
[1] != IEEE1394_BUSID_MAGIC
) {
1390 /* This isn't a 1394 device, but we let it slide. There
1391 * was a report of a device with broken firmware which
1392 * reported '2394' instead of '1394', which is obviously a
1393 * mistake. One would hope that a non-1394 device never
1394 * gets connected to Firewire bus. If someone does, we
1395 * shouldn't be held responsible, so we'll allow it with a
1397 HPSB_WARN("Node " NODE_BUS_FMT
" has invalid busID magic [0x%08x]",
1398 NODE_BUS_ARGS(host
, nodeid
), csr
->bus_info_data
[1]);
1401 guid
= ((u64
)be32_to_cpu(csr
->bus_info_data
[3]) << 32) | be32_to_cpu(csr
->bus_info_data
[4]);
1402 ne
= find_entry_by_guid(guid
);
1404 if (ne
&& ne
->host
!= host
&& ne
->in_limbo
) {
1405 /* Must have moved this device from one host to another */
1406 nodemgr_remove_ne(ne
);
1411 nodemgr_create_node(guid
, csr
, hi
, nodeid
, generation
);
1413 nodemgr_update_node(ne
, csr
, hi
, nodeid
, generation
);
1417 static void nodemgr_node_scan(struct host_info
*hi
, int generation
)
1420 struct hpsb_host
*host
= hi
->host
;
1421 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1422 nodeid_t nodeid
= LOCAL_BUS
;
1424 /* Scan each node on the bus */
1425 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1429 if (!sid
->link_active
) {
1433 nodemgr_node_scan_one(hi
, nodeid
++, generation
);
1438 static void nodemgr_suspend_ne(struct node_entry
*ne
)
1440 struct class_device
*cdev
;
1441 struct unit_directory
*ud
;
1443 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1444 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1447 WARN_ON(device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
));
1449 down(&nodemgr_ud_class
.sem
);
1450 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1451 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1455 down_write(&ieee1394_bus_type
.subsys
.rwsem
);
1456 if (ud
->device
.driver
&&
1457 (!ud
->device
.driver
->suspend
||
1458 ud
->device
.driver
->suspend(&ud
->device
, PMSG_SUSPEND
)))
1459 device_release_driver(&ud
->device
);
1460 up_write(&ieee1394_bus_type
.subsys
.rwsem
);
1462 up(&nodemgr_ud_class
.sem
);
1466 static void nodemgr_resume_ne(struct node_entry
*ne
)
1468 struct class_device
*cdev
;
1469 struct unit_directory
*ud
;
1472 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1474 down(&nodemgr_ud_class
.sem
);
1475 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1476 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1480 down_read(&ieee1394_bus_type
.subsys
.rwsem
);
1481 if (ud
->device
.driver
&& ud
->device
.driver
->resume
)
1482 ud
->device
.driver
->resume(&ud
->device
);
1483 up_read(&ieee1394_bus_type
.subsys
.rwsem
);
1485 up(&nodemgr_ud_class
.sem
);
1487 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1488 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1492 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1494 struct unit_directory
*ud
;
1495 struct hpsb_protocol_driver
*pdrv
;
1496 struct class_device
*cdev
;
1498 down(&nodemgr_ud_class
.sem
);
1499 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1500 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1504 down_write(&ieee1394_bus_type
.subsys
.rwsem
);
1505 if (ud
->device
.driver
) {
1506 pdrv
= container_of(ud
->device
.driver
,
1507 struct hpsb_protocol_driver
,
1509 if (pdrv
->update
&& pdrv
->update(ud
))
1510 device_release_driver(&ud
->device
);
1512 up_write(&ieee1394_bus_type
.subsys
.rwsem
);
1514 up(&nodemgr_ud_class
.sem
);
1518 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1519 * seems like an optional service but in the end it is practically mandatory
1520 * as a consequence of these clauses.
1522 * Note that we cannot do a broadcast write to all nodes at once because some
1523 * pre-1394a devices would hang. */
1524 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1526 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1527 quadlet_t bc_remote
, bc_local
;
1530 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1531 ne
->nodeid
== ne
->host
->node_id
)
1534 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1536 /* Check if the register is implemented and 1394a compliant. */
1537 error
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &bc_remote
,
1539 if (!error
&& bc_remote
& cpu_to_be32(0x80000000) &&
1540 bc_remote
!= bc_local
)
1541 hpsb_node_write(ne
, bc_addr
, &bc_local
, sizeof(bc_local
));
1545 static void nodemgr_probe_ne(struct host_info
*hi
, struct node_entry
*ne
, int generation
)
1549 if (ne
->host
!= hi
->host
|| ne
->in_limbo
)
1552 dev
= get_device(&ne
->device
);
1556 nodemgr_irm_write_bc(ne
, generation
);
1558 /* If "needs_probe", then this is either a new or changed node we
1559 * rescan totally. If the generation matches for an existing node
1560 * (one that existed prior to the bus reset) we send update calls
1561 * down to the drivers. Otherwise, this is a dead node and we
1563 if (ne
->needs_probe
)
1564 nodemgr_process_root_directory(hi
, ne
);
1565 else if (ne
->generation
== generation
)
1566 nodemgr_update_pdrv(ne
);
1568 nodemgr_suspend_ne(ne
);
1574 static void nodemgr_node_probe(struct host_info
*hi
, int generation
)
1576 struct hpsb_host
*host
= hi
->host
;
1577 struct class_device
*cdev
;
1578 struct node_entry
*ne
;
1580 /* Do some processing of the nodes we've probed. This pulls them
1581 * into the sysfs layer if needed, and can result in processing of
1582 * unit-directories, or just updating the node and it's
1585 * Run updates before probes. Usually, updates are time-critical
1586 * while probes are time-consuming. (Well, those probes need some
1587 * improvement...) */
1589 down(&nodemgr_ne_class
.sem
);
1590 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1591 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1592 if (!ne
->needs_probe
)
1593 nodemgr_probe_ne(hi
, ne
, generation
);
1595 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1596 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1597 if (ne
->needs_probe
)
1598 nodemgr_probe_ne(hi
, ne
, generation
);
1600 up(&nodemgr_ne_class
.sem
);
1603 /* If we had a bus reset while we were scanning the bus, it is
1604 * possible that we did not probe all nodes. In that case, we
1605 * skip the clean up for now, since we could remove nodes that
1606 * were still on the bus. Another bus scan is pending which will
1607 * do the clean up eventually.
1609 * Now let's tell the bus to rescan our devices. This may seem
1610 * like overhead, but the driver-model core will only scan a
1611 * device for a driver when either the device is added, or when a
1612 * new driver is added. A bus reset is a good reason to rescan
1613 * devices that were there before. For example, an sbp2 device
1614 * may become available for login, if the host that held it was
1617 if (generation
== get_hpsb_generation(host
))
1618 if (bus_rescan_devices(&ieee1394_bus_type
))
1619 HPSB_DEBUG("bus_rescan_devices had an error");
1622 static int nodemgr_send_resume_packet(struct hpsb_host
*host
)
1624 struct hpsb_packet
*packet
;
1625 int error
= -ENOMEM
;
1627 packet
= hpsb_make_phypacket(host
,
1628 EXTPHYPACKET_TYPE_RESUME
|
1629 NODEID_TO_NODE(host
->node_id
) << PHYPACKET_PORT_SHIFT
);
1631 packet
->no_waiter
= 1;
1632 packet
->generation
= get_hpsb_generation(host
);
1633 error
= hpsb_send_packet(packet
);
1636 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1641 /* Perform a few high-level IRM responsibilities. */
1642 static int nodemgr_do_irm_duties(struct hpsb_host
*host
, int cycles
)
1646 /* if irm_id == -1 then there is no IRM on this bus */
1647 if (!host
->is_irm
|| host
->irm_id
== (nodeid_t
)-1)
1650 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1651 host
->csr
.broadcast_channel
|= 0x40000000;
1653 /* If there is no bus manager then we should set the root node's
1654 * force_root bit to promote bus stability per the 1394
1655 * spec. (8.4.2.6) */
1656 if (host
->busmgr_id
== 0xffff && host
->node_count
> 1)
1658 u16 root_node
= host
->node_count
- 1;
1660 /* get cycle master capability flag from root node */
1661 if (host
->is_cycmst
||
1662 (!hpsb_read(host
, LOCAL_BUS
| root_node
, get_hpsb_generation(host
),
1663 (CSR_REGISTER_BASE
+ CSR_CONFIG_ROM
+ 2 * sizeof(quadlet_t
)),
1664 &bc
, sizeof(quadlet_t
)) &&
1665 be32_to_cpu(bc
) & 1 << CSR_CMC_SHIFT
))
1666 hpsb_send_phy_config(host
, root_node
, -1);
1668 HPSB_DEBUG("The root node is not cycle master capable; "
1669 "selecting a new root node and resetting...");
1672 /* Oh screw it! Just leave the bus as it is */
1673 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1677 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1678 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1684 /* Some devices suspend their ports while being connected to an inactive
1685 * host adapter, i.e. if connected before the low-level driver is
1686 * loaded. They become visible either when physically unplugged and
1687 * replugged, or when receiving a resume packet. Send one once. */
1688 if (!host
->resume_packet_sent
&& !nodemgr_send_resume_packet(host
))
1689 host
->resume_packet_sent
= 1;
1694 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1695 * everything we can do, otherwise issue a bus reset and try to become the IRM
1697 static int nodemgr_check_irm_capability(struct hpsb_host
*host
, int cycles
)
1702 if (hpsb_disable_irm
|| host
->is_irm
)
1705 status
= hpsb_read(host
, LOCAL_BUS
| (host
->irm_id
),
1706 get_hpsb_generation(host
),
1707 (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
),
1708 &bc
, sizeof(quadlet_t
));
1710 if (status
< 0 || !(be32_to_cpu(bc
) & 0x80000000)) {
1711 /* The current irm node does not have a valid BROADCAST_CHANNEL
1712 * register and we do, so reset the bus with force_root set */
1713 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1716 /* Oh screw it! Just leave the bus as it is */
1717 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1721 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1722 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1730 static int nodemgr_host_thread(void *__hi
)
1732 struct host_info
*hi
= (struct host_info
*)__hi
;
1733 struct hpsb_host
*host
= hi
->host
;
1734 unsigned int g
, generation
= 0;
1735 int i
, reset_cycles
= 0;
1737 /* Setup our device-model entries */
1738 nodemgr_create_host_dev_files(host
);
1741 /* Sleep until next bus reset */
1742 set_current_state(TASK_INTERRUPTIBLE
);
1743 if (get_hpsb_generation(host
) == generation
)
1745 __set_current_state(TASK_RUNNING
);
1747 /* Thread may have been woken up to freeze or to exit */
1748 if (try_to_freeze())
1750 if (kthread_should_stop())
1753 if (mutex_lock_interruptible(&nodemgr_serialize
)) {
1754 if (try_to_freeze())
1759 /* Pause for 1/4 second in 1/16 second intervals,
1760 * to make sure things settle down. */
1761 g
= get_hpsb_generation(host
);
1762 for (i
= 0; i
< 4 ; i
++) {
1763 if (msleep_interruptible(63) || kthread_should_stop())
1766 /* Now get the generation in which the node ID's we collect
1767 * are valid. During the bus scan we will use this generation
1768 * for the read transactions, so that if another reset occurs
1769 * during the scan the transactions will fail instead of
1770 * returning bogus data. */
1771 generation
= get_hpsb_generation(host
);
1773 /* If we get a reset before we are done waiting, then
1774 * start the the waiting over again */
1775 if (generation
!= g
)
1776 g
= generation
, i
= 0;
1779 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1780 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
1782 mutex_unlock(&nodemgr_serialize
);
1787 /* Scan our nodes to get the bus options and create node
1788 * entries. This does not do the sysfs stuff, since that
1789 * would trigger uevents and such, which is a bad idea at
1791 nodemgr_node_scan(hi
, generation
);
1793 /* This actually does the full probe, with sysfs
1795 nodemgr_node_probe(hi
, generation
);
1797 /* Update some of our sysfs symlinks */
1798 nodemgr_update_host_dev_links(host
);
1800 mutex_unlock(&nodemgr_serialize
);
1803 mutex_unlock(&nodemgr_serialize
);
1805 HPSB_VERBOSE("NodeMgr: Exiting thread");
1809 int nodemgr_for_each_host(void *__data
, int (*cb
)(struct hpsb_host
*, void *))
1811 struct class_device
*cdev
;
1812 struct hpsb_host
*host
;
1815 down(&hpsb_host_class
.sem
);
1816 list_for_each_entry(cdev
, &hpsb_host_class
.children
, node
) {
1817 host
= container_of(cdev
, struct hpsb_host
, class_dev
);
1819 if ((error
= cb(host
, __data
)))
1822 up(&hpsb_host_class
.sem
);
1827 /* The following four convenience functions use a struct node_entry
1828 * for addressing a node on the bus. They are intended for use by any
1829 * process context, not just the nodemgr thread, so we need to be a
1830 * little careful when reading out the node ID and generation. The
1831 * thing that can go wrong is that we get the node ID, then a bus
1832 * reset occurs, and then we read the generation. The node ID is
1833 * possibly invalid, but the generation is current, and we end up
1834 * sending a packet to a the wrong node.
1836 * The solution is to make sure we read the generation first, so that
1837 * if a reset occurs in the process, we end up with a stale generation
1838 * and the transactions will fail instead of silently using wrong node
1842 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*pkt
)
1844 pkt
->host
= ne
->host
;
1845 pkt
->generation
= ne
->generation
;
1847 pkt
->node_id
= ne
->nodeid
;
1850 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1851 quadlet_t
*buffer
, size_t length
)
1853 unsigned int generation
= ne
->generation
;
1856 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1857 addr
, buffer
, length
);
1860 static void nodemgr_add_host(struct hpsb_host
*host
)
1862 struct host_info
*hi
;
1864 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1866 HPSB_ERR("NodeMgr: out of memory in add host");
1870 hi
->thread
= kthread_run(nodemgr_host_thread
, hi
, "knodemgrd_%d",
1872 if (IS_ERR(hi
->thread
)) {
1873 HPSB_ERR("NodeMgr: cannot start thread for host %d", host
->id
);
1874 hpsb_destroy_hostinfo(&nodemgr_highlevel
, host
);
1878 static void nodemgr_host_reset(struct hpsb_host
*host
)
1880 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1883 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host
->id
);
1884 wake_up_process(hi
->thread
);
1888 static void nodemgr_remove_host(struct hpsb_host
*host
)
1890 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1893 kthread_stop(hi
->thread
);
1894 nodemgr_remove_host_dev(&host
->device
);
1898 static struct hpsb_highlevel nodemgr_highlevel
= {
1899 .name
= "Node manager",
1900 .add_host
= nodemgr_add_host
,
1901 .host_reset
= nodemgr_host_reset
,
1902 .remove_host
= nodemgr_remove_host
,
1905 int init_ieee1394_nodemgr(void)
1909 error
= class_register(&nodemgr_ne_class
);
1913 error
= class_register(&nodemgr_ud_class
);
1915 class_unregister(&nodemgr_ne_class
);
1918 error
= driver_register(&nodemgr_mid_layer_driver
);
1919 hpsb_register_highlevel(&nodemgr_highlevel
);
1923 void cleanup_ieee1394_nodemgr(void)
1925 hpsb_unregister_highlevel(&nodemgr_highlevel
);
1927 class_unregister(&nodemgr_ud_class
);
1928 class_unregister(&nodemgr_ne_class
);