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
*tmp
, *ud
;
759 /* Iteration over nodemgr_ud_class.children has to be protected by
760 * nodemgr_ud_class.sem, but class_device_unregister() will eventually
761 * take nodemgr_ud_class.sem too. Therefore pick out one ud at a time,
762 * release the semaphore, and then unregister the ud. Since this code
763 * may be called from other contexts besides the knodemgrds, protect the
764 * gap after release of the semaphore by nodemgr_serialize_remove_uds.
766 mutex_lock(&nodemgr_serialize_remove_uds
);
769 down(&nodemgr_ud_class
.sem
);
770 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
771 tmp
= container_of(cdev
, struct unit_directory
,
778 up(&nodemgr_ud_class
.sem
);
781 class_device_unregister(&ud
->class_dev
);
782 device_unregister(&ud
->device
);
784 mutex_unlock(&nodemgr_serialize_remove_uds
);
788 static void nodemgr_remove_ne(struct node_entry
*ne
)
792 dev
= get_device(&ne
->device
);
796 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
797 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
799 nodemgr_remove_uds(ne
);
801 class_device_unregister(&ne
->class_dev
);
802 device_unregister(dev
);
807 static int __nodemgr_remove_host_dev(struct device
*dev
, void *data
)
809 nodemgr_remove_ne(container_of(dev
, struct node_entry
, device
));
813 static void nodemgr_remove_host_dev(struct device
*dev
)
815 WARN_ON(device_for_each_child(dev
, NULL
, __nodemgr_remove_host_dev
));
816 sysfs_remove_link(&dev
->kobj
, "irm_id");
817 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
818 sysfs_remove_link(&dev
->kobj
, "host_id");
822 static void nodemgr_update_bus_options(struct node_entry
*ne
)
824 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
825 static const u16 mr
[] = { 4, 64, 1024, 0};
827 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
829 ne
->busopt
.irmc
= (busoptions
>> 31) & 1;
830 ne
->busopt
.cmc
= (busoptions
>> 30) & 1;
831 ne
->busopt
.isc
= (busoptions
>> 29) & 1;
832 ne
->busopt
.bmc
= (busoptions
>> 28) & 1;
833 ne
->busopt
.pmc
= (busoptions
>> 27) & 1;
834 ne
->busopt
.cyc_clk_acc
= (busoptions
>> 16) & 0xff;
835 ne
->busopt
.max_rec
= 1 << (((busoptions
>> 12) & 0xf) + 1);
836 ne
->busopt
.max_rom
= (busoptions
>> 8) & 0x3;
837 ne
->busopt
.generation
= (busoptions
>> 4) & 0xf;
838 ne
->busopt
.lnkspd
= busoptions
& 0x7;
840 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
841 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
842 busoptions
, ne
->busopt
.irmc
, ne
->busopt
.cmc
,
843 ne
->busopt
.isc
, ne
->busopt
.bmc
, ne
->busopt
.pmc
,
844 ne
->busopt
.cyc_clk_acc
, ne
->busopt
.max_rec
,
845 mr
[ne
->busopt
.max_rom
],
846 ne
->busopt
.generation
, ne
->busopt
.lnkspd
);
850 static struct node_entry
*nodemgr_create_node(octlet_t guid
, struct csr1212_csr
*csr
,
851 struct host_info
*hi
, nodeid_t nodeid
,
852 unsigned int generation
)
854 struct hpsb_host
*host
= hi
->host
;
855 struct node_entry
*ne
;
857 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
863 ne
->generation
= generation
;
867 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
868 ne
->guid_vendor_oui
= nodemgr_find_oui_name(ne
->guid_vendor_id
);
871 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
873 ne
->device
.parent
= &host
->device
;
874 snprintf(ne
->device
.bus_id
, BUS_ID_SIZE
, "%016Lx",
875 (unsigned long long)(ne
->guid
));
877 ne
->class_dev
.dev
= &ne
->device
;
878 ne
->class_dev
.class = &nodemgr_ne_class
;
879 snprintf(ne
->class_dev
.class_id
, BUS_ID_SIZE
, "%016Lx",
880 (unsigned long long)(ne
->guid
));
882 if (device_register(&ne
->device
))
884 if (class_device_register(&ne
->class_dev
))
885 goto fail_classdevreg
;
886 get_device(&ne
->device
);
888 if (ne
->guid_vendor_oui
&&
889 device_create_file(&ne
->device
, &dev_attr_ne_guid_vendor_oui
))
891 nodemgr_create_ne_dev_files(ne
);
893 nodemgr_update_bus_options(ne
);
895 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
896 (host
->node_id
== nodeid
) ? "Host" : "Node",
897 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
902 put_device(&ne
->device
);
904 device_unregister(&ne
->device
);
908 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
909 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
915 static struct node_entry
*find_entry_by_guid(u64 guid
)
917 struct class_device
*cdev
;
918 struct node_entry
*ne
, *ret_ne
= NULL
;
920 down(&nodemgr_ne_class
.sem
);
921 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
922 ne
= container_of(cdev
, struct node_entry
, class_dev
);
924 if (ne
->guid
== guid
) {
929 up(&nodemgr_ne_class
.sem
);
935 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
938 struct class_device
*cdev
;
939 struct node_entry
*ne
, *ret_ne
= NULL
;
941 down(&nodemgr_ne_class
.sem
);
942 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
943 ne
= container_of(cdev
, struct node_entry
, class_dev
);
945 if (ne
->host
== host
&& ne
->nodeid
== nodeid
) {
950 up(&nodemgr_ne_class
.sem
);
956 static void nodemgr_register_device(struct node_entry
*ne
,
957 struct unit_directory
*ud
, struct device
*parent
)
959 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
962 ud
->device
.parent
= parent
;
964 snprintf(ud
->device
.bus_id
, BUS_ID_SIZE
, "%s-%u",
965 ne
->device
.bus_id
, ud
->id
);
967 ud
->class_dev
.dev
= &ud
->device
;
968 ud
->class_dev
.class = &nodemgr_ud_class
;
969 snprintf(ud
->class_dev
.class_id
, BUS_ID_SIZE
, "%s-%u",
970 ne
->device
.bus_id
, ud
->id
);
972 if (device_register(&ud
->device
))
974 if (class_device_register(&ud
->class_dev
))
975 goto fail_classdevreg
;
976 get_device(&ud
->device
);
978 if (ud
->vendor_oui
&&
979 device_create_file(&ud
->device
, &dev_attr_ud_vendor_oui
))
981 nodemgr_create_ud_dev_files(ud
);
986 put_device(&ud
->device
);
988 device_unregister(&ud
->device
);
990 HPSB_ERR("Failed to create unit %s", ud
->device
.bus_id
);
994 /* This implementation currently only scans the config rom and its
995 * immediate unit directories looking for software_id and
996 * software_version entries, in order to get driver autoloading working. */
997 static struct unit_directory
*nodemgr_process_unit_directory
998 (struct host_info
*hi
, struct node_entry
*ne
, struct csr1212_keyval
*ud_kv
,
999 unsigned int *id
, struct unit_directory
*parent
)
1001 struct unit_directory
*ud
;
1002 struct unit_directory
*ud_child
= NULL
;
1003 struct csr1212_dentry
*dentry
;
1004 struct csr1212_keyval
*kv
;
1007 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
1009 goto unit_directory_error
;
1012 ud
->ignore_driver
= ignore_drivers
;
1013 ud
->address
= ud_kv
->offset
+ CSR1212_CONFIG_ROM_SPACE_BASE
;
1017 csr1212_for_each_dir_entry(ne
->csr
, kv
, ud_kv
, dentry
) {
1018 switch (kv
->key
.id
) {
1019 case CSR1212_KV_ID_VENDOR
:
1020 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1021 ud
->vendor_id
= kv
->value
.immediate
;
1022 ud
->flags
|= UNIT_DIRECTORY_VENDOR_ID
;
1025 ud
->vendor_oui
= nodemgr_find_oui_name(ud
->vendor_id
);
1029 case CSR1212_KV_ID_MODEL
:
1030 ud
->model_id
= kv
->value
.immediate
;
1031 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1034 case CSR1212_KV_ID_SPECIFIER_ID
:
1035 ud
->specifier_id
= kv
->value
.immediate
;
1036 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1039 case CSR1212_KV_ID_VERSION
:
1040 ud
->version
= kv
->value
.immediate
;
1041 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
1044 case CSR1212_KV_ID_DESCRIPTOR
:
1045 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1046 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1047 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1048 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1049 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1050 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1051 switch (last_key_id
) {
1052 case CSR1212_KV_ID_VENDOR
:
1053 ud
->vendor_name_kv
= kv
;
1054 csr1212_keep_keyval(kv
);
1057 case CSR1212_KV_ID_MODEL
:
1058 ud
->model_name_kv
= kv
;
1059 csr1212_keep_keyval(kv
);
1063 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1066 case CSR1212_KV_ID_DEPENDENT_INFO
:
1067 /* Logical Unit Number */
1068 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1069 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
) {
1070 ud_child
= kmemdup(ud
, sizeof(*ud_child
), GFP_KERNEL
);
1072 goto unit_directory_error
;
1073 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1078 ud
->lun
= kv
->value
.immediate
;
1079 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
1081 /* Logical Unit Directory */
1082 } else if (kv
->key
.type
== CSR1212_KV_TYPE_DIRECTORY
) {
1083 /* This should really be done in SBP2 as this is
1084 * doing SBP2 specific parsing.
1087 /* first register the parent unit */
1088 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN_DIRECTORY
;
1089 if (ud
->device
.bus
!= &ieee1394_bus_type
)
1090 nodemgr_register_device(ne
, ud
, &ne
->device
);
1092 /* process the child unit */
1093 ud_child
= nodemgr_process_unit_directory(hi
, ne
, kv
, id
, ud
);
1095 if (ud_child
== NULL
)
1098 /* inherit unspecified values, the driver core picks it up */
1099 if ((ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) &&
1100 !(ud_child
->flags
& UNIT_DIRECTORY_MODEL_ID
))
1102 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1103 ud_child
->model_id
= ud
->model_id
;
1105 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1106 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1108 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1109 ud_child
->specifier_id
= ud
->specifier_id
;
1111 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1112 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1114 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1115 ud_child
->version
= ud
->version
;
1118 /* register the child unit */
1119 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1120 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
1128 last_key_id
= kv
->key
.id
;
1131 /* do not process child units here and only if not already registered */
1132 if (!parent
&& ud
->device
.bus
!= &ieee1394_bus_type
)
1133 nodemgr_register_device(ne
, ud
, &ne
->device
);
1137 unit_directory_error
:
1143 static void nodemgr_process_root_directory(struct host_info
*hi
, struct node_entry
*ne
)
1145 unsigned int ud_id
= 0;
1146 struct csr1212_dentry
*dentry
;
1147 struct csr1212_keyval
*kv
;
1150 ne
->needs_probe
= 0;
1152 csr1212_for_each_dir_entry(ne
->csr
, kv
, ne
->csr
->root_kv
, dentry
) {
1153 switch (kv
->key
.id
) {
1154 case CSR1212_KV_ID_VENDOR
:
1155 ne
->vendor_id
= kv
->value
.immediate
;
1158 ne
->vendor_oui
= nodemgr_find_oui_name(ne
->vendor_id
);
1161 case CSR1212_KV_ID_NODE_CAPABILITIES
:
1162 ne
->capabilities
= kv
->value
.immediate
;
1165 case CSR1212_KV_ID_UNIT
:
1166 nodemgr_process_unit_directory(hi
, ne
, kv
, &ud_id
, NULL
);
1169 case CSR1212_KV_ID_DESCRIPTOR
:
1170 if (last_key_id
== CSR1212_KV_ID_VENDOR
) {
1171 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1172 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1173 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1174 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1175 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1176 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1177 ne
->vendor_name_kv
= kv
;
1178 csr1212_keep_keyval(kv
);
1183 last_key_id
= kv
->key
.id
;
1186 if (ne
->vendor_oui
&&
1187 device_create_file(&ne
->device
, &dev_attr_ne_vendor_oui
))
1189 if (ne
->vendor_name_kv
&&
1190 device_create_file(&ne
->device
, &dev_attr_ne_vendor_name_kv
))
1194 HPSB_ERR("Failed to add sysfs attribute for node %016Lx",
1195 (unsigned long long)ne
->guid
);
1198 #ifdef CONFIG_HOTPLUG
1200 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1201 char *buffer
, int buffer_size
)
1203 struct unit_directory
*ud
;
1206 /* ieee1394:venNmoNspNverN */
1207 char buf
[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1212 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1214 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1217 #define PUT_ENVP(fmt,val) \
1220 envp[i++] = buffer; \
1221 printed = snprintf(buffer, buffer_size - length, \
1223 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1225 length += printed+1; \
1226 buffer += printed+1; \
1229 PUT_ENVP("VENDOR_ID=%06x", ud
->vendor_id
);
1230 PUT_ENVP("MODEL_ID=%06x", ud
->model_id
);
1231 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud
->ne
->guid
);
1232 PUT_ENVP("SPECIFIER_ID=%06x", ud
->specifier_id
);
1233 PUT_ENVP("VERSION=%06x", ud
->version
);
1234 snprintf(buf
, sizeof(buf
), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1239 PUT_ENVP("MODALIAS=%s", buf
);
1250 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1251 char *buffer
, int buffer_size
)
1256 #endif /* CONFIG_HOTPLUG */
1259 int __hpsb_register_protocol(struct hpsb_protocol_driver
*drv
,
1260 struct module
*owner
)
1264 drv
->driver
.bus
= &ieee1394_bus_type
;
1265 drv
->driver
.owner
= owner
;
1266 drv
->driver
.name
= drv
->name
;
1268 /* This will cause a probe for devices */
1269 error
= driver_register(&drv
->driver
);
1271 nodemgr_create_drv_files(drv
);
1275 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
1277 nodemgr_remove_drv_files(driver
);
1278 /* This will subsequently disconnect all devices that our driver
1279 * is attached to. */
1280 driver_unregister(&driver
->driver
);
1285 * This function updates nodes that were present on the bus before the
1286 * reset and still are after the reset. The nodeid and the config rom
1287 * may have changed, and the drivers managing this device must be
1288 * informed that this device just went through a bus reset, to allow
1289 * the to take whatever actions required.
1291 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1292 struct host_info
*hi
, nodeid_t nodeid
,
1293 unsigned int generation
)
1295 if (ne
->nodeid
!= nodeid
) {
1296 HPSB_DEBUG("Node changed: " NODE_BUS_FMT
" -> " NODE_BUS_FMT
,
1297 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1298 NODE_BUS_ARGS(ne
->host
, nodeid
));
1299 ne
->nodeid
= nodeid
;
1302 if (ne
->busopt
.generation
!= ((be32_to_cpu(csr
->bus_info_data
[2]) >> 4) & 0xf)) {
1303 kfree(ne
->csr
->private);
1304 csr1212_destroy_csr(ne
->csr
);
1307 /* If the node's configrom generation has changed, we
1308 * unregister all the unit directories. */
1309 nodemgr_remove_uds(ne
);
1311 nodemgr_update_bus_options(ne
);
1313 /* Mark the node as new, so it gets re-probed */
1314 ne
->needs_probe
= 1;
1316 /* old cache is valid, so update its generation */
1317 struct nodemgr_csr_info
*ci
= ne
->csr
->private;
1318 ci
->generation
= generation
;
1319 /* free the partially filled now unneeded new cache */
1320 kfree(csr
->private);
1321 csr1212_destroy_csr(csr
);
1325 nodemgr_resume_ne(ne
);
1327 /* Mark the node current */
1328 ne
->generation
= generation
;
1333 static void nodemgr_node_scan_one(struct host_info
*hi
,
1334 nodeid_t nodeid
, int generation
)
1336 struct hpsb_host
*host
= hi
->host
;
1337 struct node_entry
*ne
;
1339 struct csr1212_csr
*csr
;
1340 struct nodemgr_csr_info
*ci
;
1343 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
1348 ci
->nodeid
= nodeid
;
1349 ci
->generation
= generation
;
1351 /* Prepare for speed probe which occurs when reading the ROM */
1352 speed
= &(host
->speed
[NODEID_TO_NODE(nodeid
)]);
1353 if (*speed
> host
->csr
.lnk_spd
)
1354 *speed
= host
->csr
.lnk_spd
;
1355 ci
->speed_unverified
= *speed
> IEEE1394_SPEED_100
;
1357 /* We need to detect when the ConfigROM's generation has changed,
1358 * so we only update the node's info when it needs to be. */
1360 csr
= csr1212_create_csr(&nodemgr_csr_ops
, 5 * sizeof(quadlet_t
), ci
);
1361 if (!csr
|| csr1212_parse_csr(csr
) != CSR1212_SUCCESS
) {
1362 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT
,
1363 NODE_BUS_ARGS(host
, nodeid
));
1365 csr1212_destroy_csr(csr
);
1370 if (csr
->bus_info_data
[1] != IEEE1394_BUSID_MAGIC
) {
1371 /* This isn't a 1394 device, but we let it slide. There
1372 * was a report of a device with broken firmware which
1373 * reported '2394' instead of '1394', which is obviously a
1374 * mistake. One would hope that a non-1394 device never
1375 * gets connected to Firewire bus. If someone does, we
1376 * shouldn't be held responsible, so we'll allow it with a
1378 HPSB_WARN("Node " NODE_BUS_FMT
" has invalid busID magic [0x%08x]",
1379 NODE_BUS_ARGS(host
, nodeid
), csr
->bus_info_data
[1]);
1382 guid
= ((u64
)be32_to_cpu(csr
->bus_info_data
[3]) << 32) | be32_to_cpu(csr
->bus_info_data
[4]);
1383 ne
= find_entry_by_guid(guid
);
1385 if (ne
&& ne
->host
!= host
&& ne
->in_limbo
) {
1386 /* Must have moved this device from one host to another */
1387 nodemgr_remove_ne(ne
);
1392 nodemgr_create_node(guid
, csr
, hi
, nodeid
, generation
);
1394 nodemgr_update_node(ne
, csr
, hi
, nodeid
, generation
);
1398 static void nodemgr_node_scan(struct host_info
*hi
, int generation
)
1401 struct hpsb_host
*host
= hi
->host
;
1402 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1403 nodeid_t nodeid
= LOCAL_BUS
;
1405 /* Scan each node on the bus */
1406 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1410 if (!sid
->link_active
) {
1414 nodemgr_node_scan_one(hi
, nodeid
++, generation
);
1419 static void nodemgr_suspend_ne(struct node_entry
*ne
)
1421 struct class_device
*cdev
;
1422 struct unit_directory
*ud
;
1424 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1425 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1428 WARN_ON(device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
));
1430 down(&nodemgr_ud_class
.sem
);
1431 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1432 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1436 down_write(&ieee1394_bus_type
.subsys
.rwsem
);
1437 if (ud
->device
.driver
&&
1438 (!ud
->device
.driver
->suspend
||
1439 ud
->device
.driver
->suspend(&ud
->device
, PMSG_SUSPEND
)))
1440 device_release_driver(&ud
->device
);
1441 up_write(&ieee1394_bus_type
.subsys
.rwsem
);
1443 up(&nodemgr_ud_class
.sem
);
1447 static void nodemgr_resume_ne(struct node_entry
*ne
)
1449 struct class_device
*cdev
;
1450 struct unit_directory
*ud
;
1453 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1455 down(&nodemgr_ud_class
.sem
);
1456 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1457 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1461 down_read(&ieee1394_bus_type
.subsys
.rwsem
);
1462 if (ud
->device
.driver
&& ud
->device
.driver
->resume
)
1463 ud
->device
.driver
->resume(&ud
->device
);
1464 up_read(&ieee1394_bus_type
.subsys
.rwsem
);
1466 up(&nodemgr_ud_class
.sem
);
1468 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1469 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1473 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1475 struct unit_directory
*ud
;
1476 struct hpsb_protocol_driver
*pdrv
;
1477 struct class_device
*cdev
;
1479 down(&nodemgr_ud_class
.sem
);
1480 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1481 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1485 down_write(&ieee1394_bus_type
.subsys
.rwsem
);
1486 if (ud
->device
.driver
) {
1487 pdrv
= container_of(ud
->device
.driver
,
1488 struct hpsb_protocol_driver
,
1490 if (pdrv
->update
&& pdrv
->update(ud
))
1491 device_release_driver(&ud
->device
);
1493 up_write(&ieee1394_bus_type
.subsys
.rwsem
);
1495 up(&nodemgr_ud_class
.sem
);
1499 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1500 * seems like an optional service but in the end it is practically mandatory
1501 * as a consequence of these clauses.
1503 * Note that we cannot do a broadcast write to all nodes at once because some
1504 * pre-1394a devices would hang. */
1505 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1507 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1508 quadlet_t bc_remote
, bc_local
;
1511 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1512 ne
->nodeid
== ne
->host
->node_id
)
1515 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1517 /* Check if the register is implemented and 1394a compliant. */
1518 error
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &bc_remote
,
1520 if (!error
&& bc_remote
& cpu_to_be32(0x80000000) &&
1521 bc_remote
!= bc_local
)
1522 hpsb_node_write(ne
, bc_addr
, &bc_local
, sizeof(bc_local
));
1526 static void nodemgr_probe_ne(struct host_info
*hi
, struct node_entry
*ne
, int generation
)
1530 if (ne
->host
!= hi
->host
|| ne
->in_limbo
)
1533 dev
= get_device(&ne
->device
);
1537 nodemgr_irm_write_bc(ne
, generation
);
1539 /* If "needs_probe", then this is either a new or changed node we
1540 * rescan totally. If the generation matches for an existing node
1541 * (one that existed prior to the bus reset) we send update calls
1542 * down to the drivers. Otherwise, this is a dead node and we
1544 if (ne
->needs_probe
)
1545 nodemgr_process_root_directory(hi
, ne
);
1546 else if (ne
->generation
== generation
)
1547 nodemgr_update_pdrv(ne
);
1549 nodemgr_suspend_ne(ne
);
1555 static void nodemgr_node_probe(struct host_info
*hi
, int generation
)
1557 struct hpsb_host
*host
= hi
->host
;
1558 struct class_device
*cdev
;
1559 struct node_entry
*ne
;
1561 /* Do some processing of the nodes we've probed. This pulls them
1562 * into the sysfs layer if needed, and can result in processing of
1563 * unit-directories, or just updating the node and it's
1566 * Run updates before probes. Usually, updates are time-critical
1567 * while probes are time-consuming. (Well, those probes need some
1568 * improvement...) */
1570 down(&nodemgr_ne_class
.sem
);
1571 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1572 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1573 if (!ne
->needs_probe
)
1574 nodemgr_probe_ne(hi
, ne
, generation
);
1576 list_for_each_entry(cdev
, &nodemgr_ne_class
.children
, node
) {
1577 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1578 if (ne
->needs_probe
)
1579 nodemgr_probe_ne(hi
, ne
, generation
);
1581 up(&nodemgr_ne_class
.sem
);
1584 /* If we had a bus reset while we were scanning the bus, it is
1585 * possible that we did not probe all nodes. In that case, we
1586 * skip the clean up for now, since we could remove nodes that
1587 * were still on the bus. Another bus scan is pending which will
1588 * do the clean up eventually.
1590 * Now let's tell the bus to rescan our devices. This may seem
1591 * like overhead, but the driver-model core will only scan a
1592 * device for a driver when either the device is added, or when a
1593 * new driver is added. A bus reset is a good reason to rescan
1594 * devices that were there before. For example, an sbp2 device
1595 * may become available for login, if the host that held it was
1598 if (generation
== get_hpsb_generation(host
))
1599 if (bus_rescan_devices(&ieee1394_bus_type
))
1600 HPSB_DEBUG("bus_rescan_devices had an error");
1603 static int nodemgr_send_resume_packet(struct hpsb_host
*host
)
1605 struct hpsb_packet
*packet
;
1606 int error
= -ENOMEM
;
1608 packet
= hpsb_make_phypacket(host
,
1609 EXTPHYPACKET_TYPE_RESUME
|
1610 NODEID_TO_NODE(host
->node_id
) << PHYPACKET_PORT_SHIFT
);
1612 packet
->no_waiter
= 1;
1613 packet
->generation
= get_hpsb_generation(host
);
1614 error
= hpsb_send_packet(packet
);
1617 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1622 /* Perform a few high-level IRM responsibilities. */
1623 static int nodemgr_do_irm_duties(struct hpsb_host
*host
, int cycles
)
1627 /* if irm_id == -1 then there is no IRM on this bus */
1628 if (!host
->is_irm
|| host
->irm_id
== (nodeid_t
)-1)
1631 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1632 host
->csr
.broadcast_channel
|= 0x40000000;
1634 /* If there is no bus manager then we should set the root node's
1635 * force_root bit to promote bus stability per the 1394
1636 * spec. (8.4.2.6) */
1637 if (host
->busmgr_id
== 0xffff && host
->node_count
> 1)
1639 u16 root_node
= host
->node_count
- 1;
1641 /* get cycle master capability flag from root node */
1642 if (host
->is_cycmst
||
1643 (!hpsb_read(host
, LOCAL_BUS
| root_node
, get_hpsb_generation(host
),
1644 (CSR_REGISTER_BASE
+ CSR_CONFIG_ROM
+ 2 * sizeof(quadlet_t
)),
1645 &bc
, sizeof(quadlet_t
)) &&
1646 be32_to_cpu(bc
) & 1 << CSR_CMC_SHIFT
))
1647 hpsb_send_phy_config(host
, root_node
, -1);
1649 HPSB_DEBUG("The root node is not cycle master capable; "
1650 "selecting a new root node and resetting...");
1653 /* Oh screw it! Just leave the bus as it is */
1654 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1658 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1659 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1665 /* Some devices suspend their ports while being connected to an inactive
1666 * host adapter, i.e. if connected before the low-level driver is
1667 * loaded. They become visible either when physically unplugged and
1668 * replugged, or when receiving a resume packet. Send one once. */
1669 if (!host
->resume_packet_sent
&& !nodemgr_send_resume_packet(host
))
1670 host
->resume_packet_sent
= 1;
1675 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1676 * everything we can do, otherwise issue a bus reset and try to become the IRM
1678 static int nodemgr_check_irm_capability(struct hpsb_host
*host
, int cycles
)
1683 if (hpsb_disable_irm
|| host
->is_irm
)
1686 status
= hpsb_read(host
, LOCAL_BUS
| (host
->irm_id
),
1687 get_hpsb_generation(host
),
1688 (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
),
1689 &bc
, sizeof(quadlet_t
));
1691 if (status
< 0 || !(be32_to_cpu(bc
) & 0x80000000)) {
1692 /* The current irm node does not have a valid BROADCAST_CHANNEL
1693 * register and we do, so reset the bus with force_root set */
1694 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1697 /* Oh screw it! Just leave the bus as it is */
1698 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1702 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1703 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1711 static int nodemgr_host_thread(void *__hi
)
1713 struct host_info
*hi
= (struct host_info
*)__hi
;
1714 struct hpsb_host
*host
= hi
->host
;
1715 unsigned int g
, generation
= 0;
1716 int i
, reset_cycles
= 0;
1718 /* Setup our device-model entries */
1719 nodemgr_create_host_dev_files(host
);
1722 /* Sleep until next bus reset */
1723 set_current_state(TASK_INTERRUPTIBLE
);
1724 if (get_hpsb_generation(host
) == generation
)
1726 __set_current_state(TASK_RUNNING
);
1728 /* Thread may have been woken up to freeze or to exit */
1729 if (try_to_freeze())
1731 if (kthread_should_stop())
1734 if (mutex_lock_interruptible(&nodemgr_serialize
)) {
1735 if (try_to_freeze())
1740 /* Pause for 1/4 second in 1/16 second intervals,
1741 * to make sure things settle down. */
1742 g
= get_hpsb_generation(host
);
1743 for (i
= 0; i
< 4 ; i
++) {
1744 if (msleep_interruptible(63) || kthread_should_stop())
1747 /* Now get the generation in which the node ID's we collect
1748 * are valid. During the bus scan we will use this generation
1749 * for the read transactions, so that if another reset occurs
1750 * during the scan the transactions will fail instead of
1751 * returning bogus data. */
1752 generation
= get_hpsb_generation(host
);
1754 /* If we get a reset before we are done waiting, then
1755 * start the the waiting over again */
1756 if (generation
!= g
)
1757 g
= generation
, i
= 0;
1760 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1761 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
1763 mutex_unlock(&nodemgr_serialize
);
1768 /* Scan our nodes to get the bus options and create node
1769 * entries. This does not do the sysfs stuff, since that
1770 * would trigger uevents and such, which is a bad idea at
1772 nodemgr_node_scan(hi
, generation
);
1774 /* This actually does the full probe, with sysfs
1776 nodemgr_node_probe(hi
, generation
);
1778 /* Update some of our sysfs symlinks */
1779 nodemgr_update_host_dev_links(host
);
1781 mutex_unlock(&nodemgr_serialize
);
1784 mutex_unlock(&nodemgr_serialize
);
1786 HPSB_VERBOSE("NodeMgr: Exiting thread");
1790 int nodemgr_for_each_host(void *__data
, int (*cb
)(struct hpsb_host
*, void *))
1792 struct class_device
*cdev
;
1793 struct hpsb_host
*host
;
1796 down(&hpsb_host_class
.sem
);
1797 list_for_each_entry(cdev
, &hpsb_host_class
.children
, node
) {
1798 host
= container_of(cdev
, struct hpsb_host
, class_dev
);
1800 if ((error
= cb(host
, __data
)))
1803 up(&hpsb_host_class
.sem
);
1808 /* The following four convenience functions use a struct node_entry
1809 * for addressing a node on the bus. They are intended for use by any
1810 * process context, not just the nodemgr thread, so we need to be a
1811 * little careful when reading out the node ID and generation. The
1812 * thing that can go wrong is that we get the node ID, then a bus
1813 * reset occurs, and then we read the generation. The node ID is
1814 * possibly invalid, but the generation is current, and we end up
1815 * sending a packet to a the wrong node.
1817 * The solution is to make sure we read the generation first, so that
1818 * if a reset occurs in the process, we end up with a stale generation
1819 * and the transactions will fail instead of silently using wrong node
1823 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*pkt
)
1825 pkt
->host
= ne
->host
;
1826 pkt
->generation
= ne
->generation
;
1828 pkt
->node_id
= ne
->nodeid
;
1831 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1832 quadlet_t
*buffer
, size_t length
)
1834 unsigned int generation
= ne
->generation
;
1837 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1838 addr
, buffer
, length
);
1841 static void nodemgr_add_host(struct hpsb_host
*host
)
1843 struct host_info
*hi
;
1845 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1847 HPSB_ERR("NodeMgr: out of memory in add host");
1851 hi
->thread
= kthread_run(nodemgr_host_thread
, hi
, "knodemgrd_%d",
1853 if (IS_ERR(hi
->thread
)) {
1854 HPSB_ERR("NodeMgr: cannot start thread for host %d", host
->id
);
1855 hpsb_destroy_hostinfo(&nodemgr_highlevel
, host
);
1859 static void nodemgr_host_reset(struct hpsb_host
*host
)
1861 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1864 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host
->id
);
1865 wake_up_process(hi
->thread
);
1869 static void nodemgr_remove_host(struct hpsb_host
*host
)
1871 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1874 kthread_stop(hi
->thread
);
1875 nodemgr_remove_host_dev(&host
->device
);
1879 static struct hpsb_highlevel nodemgr_highlevel
= {
1880 .name
= "Node manager",
1881 .add_host
= nodemgr_add_host
,
1882 .host_reset
= nodemgr_host_reset
,
1883 .remove_host
= nodemgr_remove_host
,
1886 int init_ieee1394_nodemgr(void)
1890 error
= class_register(&nodemgr_ne_class
);
1894 error
= class_register(&nodemgr_ud_class
);
1896 class_unregister(&nodemgr_ne_class
);
1899 error
= driver_register(&nodemgr_mid_layer_driver
);
1900 hpsb_register_highlevel(&nodemgr_highlevel
);
1904 void cleanup_ieee1394_nodemgr(void)
1906 hpsb_unregister_highlevel(&nodemgr_highlevel
);
1908 class_unregister(&nodemgr_ud_class
);
1909 class_unregister(&nodemgr_ne_class
);