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/smp_lock.h>
16 #include <linux/interrupt.h>
17 #include <linux/kmod.h>
18 #include <linux/completion.h>
19 #include <linux/delay.h>
20 #include <linux/pci.h>
21 #include <linux/moduleparam.h>
22 #include <asm/atomic.h>
24 #include "ieee1394_types.h"
26 #include "ieee1394_core.h"
28 #include "ieee1394_transactions.h"
29 #include "highlevel.h"
33 static int ignore_drivers
;
34 module_param(ignore_drivers
, int, 0444);
35 MODULE_PARM_DESC(ignore_drivers
, "Disable automatic probing for drivers.");
37 struct nodemgr_csr_info
{
38 struct hpsb_host
*host
;
40 unsigned int generation
;
41 unsigned int speed_unverified
:1;
45 static char *nodemgr_find_oui_name(int oui
)
47 #ifdef CONFIG_IEEE1394_OUI_DB
48 extern struct oui_list_struct
{
54 for (i
= 0; oui_list
[i
].name
; i
++)
55 if (oui_list
[i
].oui
== oui
)
56 return oui_list
[i
].name
;
62 * Correct the speed map entry. This is necessary
63 * - for nodes with link speed < phy speed,
64 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
65 * A possible speed is determined by trial and error, using quadlet reads.
67 static int nodemgr_check_speed(struct nodemgr_csr_info
*ci
, u64 addr
,
71 u8 i
, *speed
, old_speed
, good_speed
;
74 speed
= ci
->host
->speed
+ NODEID_TO_NODE(ci
->nodeid
);
76 good_speed
= IEEE1394_SPEED_MAX
+ 1;
78 /* Try every speed from S100 to old_speed.
79 * If we did it the other way around, a too low speed could be caught
80 * if the retry succeeded for some other reason, e.g. because the link
81 * just finished its initialization. */
82 for (i
= IEEE1394_SPEED_100
; i
<= old_speed
; i
++) {
84 ret
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
85 &q
, sizeof(quadlet_t
));
91 if (good_speed
<= IEEE1394_SPEED_MAX
) {
92 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT
" yields %s",
93 NODE_BUS_ARGS(ci
->host
, ci
->nodeid
),
94 hpsb_speedto_str
[good_speed
]);
96 ci
->speed_unverified
= 0;
103 static int nodemgr_bus_read(struct csr1212_csr
*csr
, u64 addr
, u16 length
,
104 void *buffer
, void *__ci
)
106 struct nodemgr_csr_info
*ci
= (struct nodemgr_csr_info
*)__ci
;
110 ret
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
113 ci
->speed_unverified
= 0;
116 /* Give up after 3rd failure. */
120 /* The ieee1394_core guessed the node's speed capability from
121 * the self ID. Check whether a lower speed works. */
122 if (ci
->speed_unverified
&& length
== sizeof(quadlet_t
)) {
123 ret
= nodemgr_check_speed(ci
, addr
, buffer
);
127 if (msleep_interruptible(334))
133 static int nodemgr_get_max_rom(quadlet_t
*bus_info_data
, void *__ci
)
135 return (CSR1212_BE32_TO_CPU(bus_info_data
[2]) >> 8) & 0x3;
138 static struct csr1212_bus_ops nodemgr_csr_ops
= {
139 .bus_read
= nodemgr_bus_read
,
140 .get_max_rom
= nodemgr_get_max_rom
145 * Basically what we do here is start off retrieving the bus_info block.
146 * From there will fill in some info about the node, verify it is of IEEE
147 * 1394 type, and that the crc checks out ok. After that we start off with
148 * the root directory, and subdirectories. To do this, we retrieve the
149 * quadlet header for a directory, find out the length, and retrieve the
150 * complete directory entry (be it a leaf or a directory). We then process
151 * it and add the info to our structure for that particular node.
153 * We verify CRC's along the way for each directory/block/leaf. The entire
154 * node structure is generic, and simply stores the information in a way
155 * that's easy to parse by the protocol interface.
159 * The nodemgr relies heavily on the Driver Model for device callbacks and
160 * driver/device mappings. The old nodemgr used to handle all this itself,
161 * but now we are much simpler because of the LDM.
164 static DECLARE_MUTEX(nodemgr_serialize
);
167 struct hpsb_host
*host
;
168 struct list_head list
;
169 struct completion exited
;
170 struct semaphore reset_sem
;
172 char daemon_name
[15];
176 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
);
177 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
178 char *buffer
, int buffer_size
);
179 static void nodemgr_resume_ne(struct node_entry
*ne
);
180 static void nodemgr_remove_ne(struct node_entry
*ne
);
181 static struct node_entry
*find_entry_by_guid(u64 guid
);
183 struct bus_type ieee1394_bus_type
= {
185 .match
= nodemgr_bus_match
,
188 static void host_cls_release(struct class_device
*class_dev
)
190 put_device(&container_of((class_dev
), struct hpsb_host
, class_dev
)->device
);
193 struct class hpsb_host_class
= {
194 .name
= "ieee1394_host",
195 .release
= host_cls_release
,
198 static void ne_cls_release(struct class_device
*class_dev
)
200 put_device(&container_of((class_dev
), struct node_entry
, class_dev
)->device
);
203 static struct class nodemgr_ne_class
= {
204 .name
= "ieee1394_node",
205 .release
= ne_cls_release
,
208 static void ud_cls_release(struct class_device
*class_dev
)
210 put_device(&container_of((class_dev
), struct unit_directory
, class_dev
)->device
);
213 /* The name here is only so that unit directory hotplug works with old
214 * style hotplug, which only ever did unit directories anyway. */
215 static struct class nodemgr_ud_class
= {
217 .release
= ud_cls_release
,
218 .uevent
= nodemgr_uevent
,
221 static struct hpsb_highlevel nodemgr_highlevel
;
224 static void nodemgr_release_ud(struct device
*dev
)
226 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
228 if (ud
->vendor_name_kv
)
229 csr1212_release_keyval(ud
->vendor_name_kv
);
230 if (ud
->model_name_kv
)
231 csr1212_release_keyval(ud
->model_name_kv
);
236 static void nodemgr_release_ne(struct device
*dev
)
238 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
240 if (ne
->vendor_name_kv
)
241 csr1212_release_keyval(ne
->vendor_name_kv
);
247 static void nodemgr_release_host(struct device
*dev
)
249 struct hpsb_host
*host
= container_of(dev
, struct hpsb_host
, device
);
251 csr1212_destroy_csr(host
->csr
.rom
);
256 static int nodemgr_ud_platform_data
;
258 static struct device nodemgr_dev_template_ud
= {
259 .bus
= &ieee1394_bus_type
,
260 .release
= nodemgr_release_ud
,
261 .platform_data
= &nodemgr_ud_platform_data
,
264 static struct device nodemgr_dev_template_ne
= {
265 .bus
= &ieee1394_bus_type
,
266 .release
= nodemgr_release_ne
,
269 struct device nodemgr_dev_template_host
= {
270 .bus
= &ieee1394_bus_type
,
271 .release
= nodemgr_release_host
,
275 #define fw_attr(class, class_type, field, type, format_string) \
276 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
279 class = container_of(dev, class_type, device); \
280 return sprintf(buf, format_string, (type)class->field); \
282 static struct device_attribute dev_attr_##class##_##field = { \
283 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
284 .show = fw_show_##class##_##field, \
287 #define fw_attr_td(class, class_type, td_kv) \
288 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
291 class_type *class = container_of(dev, class_type, device); \
292 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
294 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
296 while ((buf + len - 1) == '\0') \
302 static struct device_attribute dev_attr_##class##_##td_kv = { \
303 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
304 .show = fw_show_##class##_##td_kv, \
308 #define fw_drv_attr(field, type, format_string) \
309 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
311 struct hpsb_protocol_driver *driver; \
312 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
313 return sprintf(buf, format_string, (type)driver->field);\
315 static struct driver_attribute driver_attr_drv_##field = { \
316 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
317 .show = fw_drv_show_##field, \
321 static ssize_t
fw_show_ne_bus_options(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
323 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
325 return sprintf(buf
, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
326 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
328 ne
->busopt
.cmc
, ne
->busopt
.isc
, ne
->busopt
.bmc
,
329 ne
->busopt
.pmc
, ne
->busopt
.generation
, ne
->busopt
.lnkspd
,
332 ne
->busopt
.cyc_clk_acc
);
334 static DEVICE_ATTR(bus_options
,S_IRUGO
,fw_show_ne_bus_options
,NULL
);
337 /* tlabels_free, tlabels_allocations, tlabels_mask are read non-atomically
338 * here, therefore displayed values may be occasionally wrong. */
339 static ssize_t
fw_show_ne_tlabels_free(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
341 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
342 return sprintf(buf
, "%d\n", 64 - bitmap_weight(ne
->tpool
->pool
, 64));
344 static DEVICE_ATTR(tlabels_free
,S_IRUGO
,fw_show_ne_tlabels_free
,NULL
);
347 static ssize_t
fw_show_ne_tlabels_allocations(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
349 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
350 return sprintf(buf
, "%u\n", ne
->tpool
->allocations
);
352 static DEVICE_ATTR(tlabels_allocations
,S_IRUGO
,fw_show_ne_tlabels_allocations
,NULL
);
355 static ssize_t
fw_show_ne_tlabels_mask(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
357 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
358 #if (BITS_PER_LONG <= 32)
359 return sprintf(buf
, "0x%08lx%08lx\n", ne
->tpool
->pool
[0], ne
->tpool
->pool
[1]);
361 return sprintf(buf
, "0x%016lx\n", ne
->tpool
->pool
[0]);
364 static DEVICE_ATTR(tlabels_mask
, S_IRUGO
, fw_show_ne_tlabels_mask
, NULL
);
367 static ssize_t
fw_set_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
369 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
370 int state
= simple_strtoul(buf
, NULL
, 10);
373 down_write(&dev
->bus
->subsys
.rwsem
);
374 device_release_driver(dev
);
375 ud
->ignore_driver
= 1;
376 up_write(&dev
->bus
->subsys
.rwsem
);
378 ud
->ignore_driver
= 0;
382 static ssize_t
fw_get_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
384 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
386 return sprintf(buf
, "%d\n", ud
->ignore_driver
);
388 static DEVICE_ATTR(ignore_driver
, S_IWUSR
| S_IRUGO
, fw_get_ignore_driver
, fw_set_ignore_driver
);
391 static ssize_t
fw_set_destroy_node(struct bus_type
*bus
, const char *buf
, size_t count
)
393 struct node_entry
*ne
;
394 u64 guid
= (u64
)simple_strtoull(buf
, NULL
, 16);
396 ne
= find_entry_by_guid(guid
);
398 if (ne
== NULL
|| !ne
->in_limbo
)
401 nodemgr_remove_ne(ne
);
405 static ssize_t
fw_get_destroy_node(struct bus_type
*bus
, char *buf
)
407 return sprintf(buf
, "You can destroy in_limbo nodes by writing their GUID to this file\n");
409 static BUS_ATTR(destroy_node
, S_IWUSR
| S_IRUGO
, fw_get_destroy_node
, fw_set_destroy_node
);
411 static int nodemgr_rescan_bus_thread(void *__unused
)
413 /* No userlevel access needed */
414 daemonize("kfwrescan");
416 bus_rescan_devices(&ieee1394_bus_type
);
421 static ssize_t
fw_set_rescan(struct bus_type
*bus
, const char *buf
, size_t count
)
423 int state
= simple_strtoul(buf
, NULL
, 10);
425 /* Don't wait for this, or care about errors. Root could do
426 * something stupid and spawn this a lot of times, but that's
429 kernel_thread(nodemgr_rescan_bus_thread
, NULL
, CLONE_KERNEL
);
433 static ssize_t
fw_get_rescan(struct bus_type
*bus
, char *buf
)
435 return sprintf(buf
, "You can force a rescan of the bus for "
436 "drivers by writing a 1 to this file\n");
438 static BUS_ATTR(rescan
, S_IWUSR
| S_IRUGO
, fw_get_rescan
, fw_set_rescan
);
441 static ssize_t
fw_set_ignore_drivers(struct bus_type
*bus
, const char *buf
, size_t count
)
443 int state
= simple_strtoul(buf
, NULL
, 10);
452 static ssize_t
fw_get_ignore_drivers(struct bus_type
*bus
, char *buf
)
454 return sprintf(buf
, "%d\n", ignore_drivers
);
456 static BUS_ATTR(ignore_drivers
, S_IWUSR
| S_IRUGO
, fw_get_ignore_drivers
, fw_set_ignore_drivers
);
459 struct bus_attribute
*const fw_bus_attrs
[] = {
460 &bus_attr_destroy_node
,
462 &bus_attr_ignore_drivers
,
467 fw_attr(ne
, struct node_entry
, capabilities
, unsigned int, "0x%06x\n")
468 fw_attr(ne
, struct node_entry
, nodeid
, unsigned int, "0x%04x\n")
470 fw_attr(ne
, struct node_entry
, vendor_id
, unsigned int, "0x%06x\n")
471 fw_attr_td(ne
, struct node_entry
, vendor_name_kv
)
472 fw_attr(ne
, struct node_entry
, vendor_oui
, const char *, "%s\n")
474 fw_attr(ne
, struct node_entry
, guid
, unsigned long long, "0x%016Lx\n")
475 fw_attr(ne
, struct node_entry
, guid_vendor_id
, unsigned int, "0x%06x\n")
476 fw_attr(ne
, struct node_entry
, guid_vendor_oui
, const char *, "%s\n")
477 fw_attr(ne
, struct node_entry
, in_limbo
, int, "%d\n");
479 static struct device_attribute
*const fw_ne_attrs
[] = {
481 &dev_attr_ne_guid_vendor_id
,
482 &dev_attr_ne_capabilities
,
483 &dev_attr_ne_vendor_id
,
485 &dev_attr_bus_options
,
486 &dev_attr_tlabels_free
,
487 &dev_attr_tlabels_allocations
,
488 &dev_attr_tlabels_mask
,
493 fw_attr(ud
, struct unit_directory
, address
, unsigned long long, "0x%016Lx\n")
494 fw_attr(ud
, struct unit_directory
, length
, int, "%d\n")
495 /* These are all dependent on the value being provided */
496 fw_attr(ud
, struct unit_directory
, vendor_id
, unsigned int, "0x%06x\n")
497 fw_attr(ud
, struct unit_directory
, model_id
, unsigned int, "0x%06x\n")
498 fw_attr(ud
, struct unit_directory
, specifier_id
, unsigned int, "0x%06x\n")
499 fw_attr(ud
, struct unit_directory
, version
, unsigned int, "0x%06x\n")
500 fw_attr_td(ud
, struct unit_directory
, vendor_name_kv
)
501 fw_attr(ud
, struct unit_directory
, vendor_oui
, const char *, "%s\n")
502 fw_attr_td(ud
, struct unit_directory
, model_name_kv
)
504 static struct device_attribute
*const fw_ud_attrs
[] = {
505 &dev_attr_ud_address
,
507 &dev_attr_ignore_driver
,
511 fw_attr(host
, struct hpsb_host
, node_count
, int, "%d\n")
512 fw_attr(host
, struct hpsb_host
, selfid_count
, int, "%d\n")
513 fw_attr(host
, struct hpsb_host
, nodes_active
, int, "%d\n")
514 fw_attr(host
, struct hpsb_host
, in_bus_reset
, int, "%d\n")
515 fw_attr(host
, struct hpsb_host
, is_root
, int, "%d\n")
516 fw_attr(host
, struct hpsb_host
, is_cycmst
, int, "%d\n")
517 fw_attr(host
, struct hpsb_host
, is_irm
, int, "%d\n")
518 fw_attr(host
, struct hpsb_host
, is_busmgr
, int, "%d\n")
520 static struct device_attribute
*const fw_host_attrs
[] = {
521 &dev_attr_host_node_count
,
522 &dev_attr_host_selfid_count
,
523 &dev_attr_host_nodes_active
,
524 &dev_attr_host_in_bus_reset
,
525 &dev_attr_host_is_root
,
526 &dev_attr_host_is_cycmst
,
527 &dev_attr_host_is_irm
,
528 &dev_attr_host_is_busmgr
,
532 static ssize_t
fw_show_drv_device_ids(struct device_driver
*drv
, char *buf
)
534 struct hpsb_protocol_driver
*driver
;
535 struct ieee1394_device_id
*id
;
539 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
541 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
544 if (id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) {
545 length
+= sprintf(scratch
, "vendor_id=0x%06x", id
->vendor_id
);
546 scratch
= buf
+ length
;
550 if (id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) {
551 length
+= sprintf(scratch
, "%smodel_id=0x%06x",
552 need_coma
++ ? "," : "",
554 scratch
= buf
+ length
;
557 if (id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) {
558 length
+= sprintf(scratch
, "%sspecifier_id=0x%06x",
559 need_coma
++ ? "," : "",
561 scratch
= buf
+ length
;
564 if (id
->match_flags
& IEEE1394_MATCH_VERSION
) {
565 length
+= sprintf(scratch
, "%sversion=0x%06x",
566 need_coma
++ ? "," : "",
568 scratch
= buf
+ length
;
579 static DRIVER_ATTR(device_ids
,S_IRUGO
,fw_show_drv_device_ids
,NULL
);
582 fw_drv_attr(name
, const char *, "%s\n")
584 static struct driver_attribute
*const fw_drv_attrs
[] = {
585 &driver_attr_drv_name
,
586 &driver_attr_device_ids
,
590 static void nodemgr_create_drv_files(struct hpsb_protocol_driver
*driver
)
592 struct device_driver
*drv
= &driver
->driver
;
595 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
596 driver_create_file(drv
, fw_drv_attrs
[i
]);
600 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver
*driver
)
602 struct device_driver
*drv
= &driver
->driver
;
605 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
606 driver_remove_file(drv
, fw_drv_attrs
[i
]);
610 static void nodemgr_create_ne_dev_files(struct node_entry
*ne
)
612 struct device
*dev
= &ne
->device
;
615 for (i
= 0; i
< ARRAY_SIZE(fw_ne_attrs
); i
++)
616 device_create_file(dev
, fw_ne_attrs
[i
]);
620 static void nodemgr_create_host_dev_files(struct hpsb_host
*host
)
622 struct device
*dev
= &host
->device
;
625 for (i
= 0; i
< ARRAY_SIZE(fw_host_attrs
); i
++)
626 device_create_file(dev
, fw_host_attrs
[i
]);
630 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
, nodeid_t nodeid
);
632 static void nodemgr_update_host_dev_links(struct hpsb_host
*host
)
634 struct device
*dev
= &host
->device
;
635 struct node_entry
*ne
;
637 sysfs_remove_link(&dev
->kobj
, "irm_id");
638 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
639 sysfs_remove_link(&dev
->kobj
, "host_id");
641 if ((ne
= find_entry_by_nodeid(host
, host
->irm_id
)))
642 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "irm_id");
643 if ((ne
= find_entry_by_nodeid(host
, host
->busmgr_id
)))
644 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "busmgr_id");
645 if ((ne
= find_entry_by_nodeid(host
, host
->node_id
)))
646 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "host_id");
649 static void nodemgr_create_ud_dev_files(struct unit_directory
*ud
)
651 struct device
*dev
= &ud
->device
;
654 for (i
= 0; i
< ARRAY_SIZE(fw_ud_attrs
); i
++)
655 device_create_file(dev
, fw_ud_attrs
[i
]);
657 if (ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
)
658 device_create_file(dev
, &dev_attr_ud_specifier_id
);
660 if (ud
->flags
& UNIT_DIRECTORY_VERSION
)
661 device_create_file(dev
, &dev_attr_ud_version
);
663 if (ud
->flags
& UNIT_DIRECTORY_VENDOR_ID
) {
664 device_create_file(dev
, &dev_attr_ud_vendor_id
);
665 if (ud
->vendor_name_kv
)
666 device_create_file(dev
, &dev_attr_ud_vendor_name_kv
);
669 if (ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) {
670 device_create_file(dev
, &dev_attr_ud_model_id
);
671 if (ud
->model_name_kv
)
672 device_create_file(dev
, &dev_attr_ud_model_name_kv
);
677 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
)
679 struct hpsb_protocol_driver
*driver
;
680 struct unit_directory
*ud
;
681 struct ieee1394_device_id
*id
;
683 /* We only match unit directories */
684 if (dev
->platform_data
!= &nodemgr_ud_platform_data
)
687 ud
= container_of(dev
, struct unit_directory
, device
);
688 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
690 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
693 for (id
= driver
->id_table
; id
->match_flags
!= 0; id
++) {
694 if ((id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) &&
695 id
->vendor_id
!= ud
->vendor_id
)
698 if ((id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) &&
699 id
->model_id
!= ud
->model_id
)
702 if ((id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) &&
703 id
->specifier_id
!= ud
->specifier_id
)
706 if ((id
->match_flags
& IEEE1394_MATCH_VERSION
) &&
707 id
->version
!= ud
->version
)
717 static void nodemgr_remove_uds(struct node_entry
*ne
)
719 struct class_device
*cdev
, *next
;
720 struct unit_directory
*ud
;
722 list_for_each_entry_safe(cdev
, next
, &nodemgr_ud_class
.children
, node
) {
723 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
728 class_device_unregister(&ud
->class_dev
);
729 device_unregister(&ud
->device
);
734 static void nodemgr_remove_ne(struct node_entry
*ne
)
736 struct device
*dev
= &ne
->device
;
738 dev
= get_device(&ne
->device
);
742 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
743 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
745 nodemgr_remove_uds(ne
);
747 class_device_unregister(&ne
->class_dev
);
748 device_unregister(dev
);
753 static int __nodemgr_remove_host_dev(struct device
*dev
, void *data
)
755 nodemgr_remove_ne(container_of(dev
, struct node_entry
, device
));
759 static void nodemgr_remove_host_dev(struct device
*dev
)
761 device_for_each_child(dev
, NULL
, __nodemgr_remove_host_dev
);
762 sysfs_remove_link(&dev
->kobj
, "irm_id");
763 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
764 sysfs_remove_link(&dev
->kobj
, "host_id");
768 static void nodemgr_update_bus_options(struct node_entry
*ne
)
770 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
771 static const u16 mr
[] = { 4, 64, 1024, 0};
773 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
775 ne
->busopt
.irmc
= (busoptions
>> 31) & 1;
776 ne
->busopt
.cmc
= (busoptions
>> 30) & 1;
777 ne
->busopt
.isc
= (busoptions
>> 29) & 1;
778 ne
->busopt
.bmc
= (busoptions
>> 28) & 1;
779 ne
->busopt
.pmc
= (busoptions
>> 27) & 1;
780 ne
->busopt
.cyc_clk_acc
= (busoptions
>> 16) & 0xff;
781 ne
->busopt
.max_rec
= 1 << (((busoptions
>> 12) & 0xf) + 1);
782 ne
->busopt
.max_rom
= (busoptions
>> 8) & 0x3;
783 ne
->busopt
.generation
= (busoptions
>> 4) & 0xf;
784 ne
->busopt
.lnkspd
= busoptions
& 0x7;
786 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
787 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
788 busoptions
, ne
->busopt
.irmc
, ne
->busopt
.cmc
,
789 ne
->busopt
.isc
, ne
->busopt
.bmc
, ne
->busopt
.pmc
,
790 ne
->busopt
.cyc_clk_acc
, ne
->busopt
.max_rec
,
791 mr
[ne
->busopt
.max_rom
],
792 ne
->busopt
.generation
, ne
->busopt
.lnkspd
);
796 static struct node_entry
*nodemgr_create_node(octlet_t guid
, struct csr1212_csr
*csr
,
797 struct host_info
*hi
, nodeid_t nodeid
,
798 unsigned int generation
)
800 struct hpsb_host
*host
= hi
->host
;
801 struct node_entry
*ne
;
803 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
807 ne
->tpool
= &host
->tpool
[nodeid
& NODE_MASK
];
811 ne
->generation
= generation
;
815 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
816 ne
->guid_vendor_oui
= nodemgr_find_oui_name(ne
->guid_vendor_id
);
819 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
821 ne
->device
.parent
= &host
->device
;
822 snprintf(ne
->device
.bus_id
, BUS_ID_SIZE
, "%016Lx",
823 (unsigned long long)(ne
->guid
));
825 ne
->class_dev
.dev
= &ne
->device
;
826 ne
->class_dev
.class = &nodemgr_ne_class
;
827 snprintf(ne
->class_dev
.class_id
, BUS_ID_SIZE
, "%016Lx",
828 (unsigned long long)(ne
->guid
));
830 device_register(&ne
->device
);
831 class_device_register(&ne
->class_dev
);
832 get_device(&ne
->device
);
834 if (ne
->guid_vendor_oui
)
835 device_create_file(&ne
->device
, &dev_attr_ne_guid_vendor_oui
);
836 nodemgr_create_ne_dev_files(ne
);
838 nodemgr_update_bus_options(ne
);
840 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
841 (host
->node_id
== nodeid
) ? "Host" : "Node",
842 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
848 static struct node_entry
*find_entry_by_guid(u64 guid
)
850 struct class *class = &nodemgr_ne_class
;
851 struct class_device
*cdev
;
852 struct node_entry
*ne
, *ret_ne
= NULL
;
854 down_read(&class->subsys
.rwsem
);
855 list_for_each_entry(cdev
, &class->children
, node
) {
856 ne
= container_of(cdev
, struct node_entry
, class_dev
);
858 if (ne
->guid
== guid
) {
863 up_read(&class->subsys
.rwsem
);
869 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
, nodeid_t nodeid
)
871 struct class *class = &nodemgr_ne_class
;
872 struct class_device
*cdev
;
873 struct node_entry
*ne
, *ret_ne
= NULL
;
875 down_read(&class->subsys
.rwsem
);
876 list_for_each_entry(cdev
, &class->children
, node
) {
877 ne
= container_of(cdev
, struct node_entry
, class_dev
);
879 if (ne
->host
== host
&& ne
->nodeid
== nodeid
) {
884 up_read(&class->subsys
.rwsem
);
890 static void nodemgr_register_device(struct node_entry
*ne
,
891 struct unit_directory
*ud
, struct device
*parent
)
893 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
896 ud
->device
.parent
= parent
;
898 snprintf(ud
->device
.bus_id
, BUS_ID_SIZE
, "%s-%u",
899 ne
->device
.bus_id
, ud
->id
);
901 ud
->class_dev
.dev
= &ud
->device
;
902 ud
->class_dev
.class = &nodemgr_ud_class
;
903 snprintf(ud
->class_dev
.class_id
, BUS_ID_SIZE
, "%s-%u",
904 ne
->device
.bus_id
, ud
->id
);
906 device_register(&ud
->device
);
907 class_device_register(&ud
->class_dev
);
908 get_device(&ud
->device
);
911 device_create_file(&ud
->device
, &dev_attr_ud_vendor_oui
);
912 nodemgr_create_ud_dev_files(ud
);
916 /* This implementation currently only scans the config rom and its
917 * immediate unit directories looking for software_id and
918 * software_version entries, in order to get driver autoloading working. */
919 static struct unit_directory
*nodemgr_process_unit_directory
920 (struct host_info
*hi
, struct node_entry
*ne
, struct csr1212_keyval
*ud_kv
,
921 unsigned int *id
, struct unit_directory
*parent
)
923 struct unit_directory
*ud
;
924 struct unit_directory
*ud_child
= NULL
;
925 struct csr1212_dentry
*dentry
;
926 struct csr1212_keyval
*kv
;
929 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
931 goto unit_directory_error
;
934 ud
->ignore_driver
= ignore_drivers
;
935 ud
->address
= ud_kv
->offset
+ CSR1212_CONFIG_ROM_SPACE_BASE
;
939 csr1212_for_each_dir_entry(ne
->csr
, kv
, ud_kv
, dentry
) {
940 switch (kv
->key
.id
) {
941 case CSR1212_KV_ID_VENDOR
:
942 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
943 ud
->vendor_id
= kv
->value
.immediate
;
944 ud
->flags
|= UNIT_DIRECTORY_VENDOR_ID
;
947 ud
->vendor_oui
= nodemgr_find_oui_name(ud
->vendor_id
);
951 case CSR1212_KV_ID_MODEL
:
952 ud
->model_id
= kv
->value
.immediate
;
953 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
956 case CSR1212_KV_ID_SPECIFIER_ID
:
957 ud
->specifier_id
= kv
->value
.immediate
;
958 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
961 case CSR1212_KV_ID_VERSION
:
962 ud
->version
= kv
->value
.immediate
;
963 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
966 case CSR1212_KV_ID_DESCRIPTOR
:
967 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
968 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
969 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
970 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
971 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
972 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
973 switch (last_key_id
) {
974 case CSR1212_KV_ID_VENDOR
:
975 ud
->vendor_name_kv
= kv
;
976 csr1212_keep_keyval(kv
);
979 case CSR1212_KV_ID_MODEL
:
980 ud
->model_name_kv
= kv
;
981 csr1212_keep_keyval(kv
);
985 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
988 case CSR1212_KV_ID_DEPENDENT_INFO
:
989 /* Logical Unit Number */
990 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
991 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
) {
992 ud_child
= kmalloc(sizeof(*ud_child
), GFP_KERNEL
);
994 goto unit_directory_error
;
995 memcpy(ud_child
, ud
, sizeof(*ud_child
));
996 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1001 ud
->lun
= kv
->value
.immediate
;
1002 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
1004 /* Logical Unit Directory */
1005 } else if (kv
->key
.type
== CSR1212_KV_TYPE_DIRECTORY
) {
1006 /* This should really be done in SBP2 as this is
1007 * doing SBP2 specific parsing.
1010 /* first register the parent unit */
1011 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN_DIRECTORY
;
1012 if (ud
->device
.bus
!= &ieee1394_bus_type
)
1013 nodemgr_register_device(ne
, ud
, &ne
->device
);
1015 /* process the child unit */
1016 ud_child
= nodemgr_process_unit_directory(hi
, ne
, kv
, id
, ud
);
1018 if (ud_child
== NULL
)
1021 /* inherit unspecified values, the driver core picks it up */
1022 if ((ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) &&
1023 !(ud_child
->flags
& UNIT_DIRECTORY_MODEL_ID
))
1025 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1026 ud_child
->model_id
= ud
->model_id
;
1028 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1029 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1031 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1032 ud_child
->specifier_id
= ud
->specifier_id
;
1034 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1035 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1037 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1038 ud_child
->version
= ud
->version
;
1041 /* register the child unit */
1042 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1043 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
1051 last_key_id
= kv
->key
.id
;
1054 /* do not process child units here and only if not already registered */
1055 if (!parent
&& ud
->device
.bus
!= &ieee1394_bus_type
)
1056 nodemgr_register_device(ne
, ud
, &ne
->device
);
1060 unit_directory_error
:
1066 static void nodemgr_process_root_directory(struct host_info
*hi
, struct node_entry
*ne
)
1068 unsigned int ud_id
= 0;
1069 struct csr1212_dentry
*dentry
;
1070 struct csr1212_keyval
*kv
;
1073 ne
->needs_probe
= 0;
1075 csr1212_for_each_dir_entry(ne
->csr
, kv
, ne
->csr
->root_kv
, dentry
) {
1076 switch (kv
->key
.id
) {
1077 case CSR1212_KV_ID_VENDOR
:
1078 ne
->vendor_id
= kv
->value
.immediate
;
1081 ne
->vendor_oui
= nodemgr_find_oui_name(ne
->vendor_id
);
1084 case CSR1212_KV_ID_NODE_CAPABILITIES
:
1085 ne
->capabilities
= kv
->value
.immediate
;
1088 case CSR1212_KV_ID_UNIT
:
1089 nodemgr_process_unit_directory(hi
, ne
, kv
, &ud_id
, NULL
);
1092 case CSR1212_KV_ID_DESCRIPTOR
:
1093 if (last_key_id
== CSR1212_KV_ID_VENDOR
) {
1094 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1095 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1096 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1097 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1098 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1099 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1100 ne
->vendor_name_kv
= kv
;
1101 csr1212_keep_keyval(kv
);
1106 last_key_id
= kv
->key
.id
;
1110 device_create_file(&ne
->device
, &dev_attr_ne_vendor_oui
);
1111 if (ne
->vendor_name_kv
)
1112 device_create_file(&ne
->device
, &dev_attr_ne_vendor_name_kv
);
1115 #ifdef CONFIG_HOTPLUG
1117 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1118 char *buffer
, int buffer_size
)
1120 struct unit_directory
*ud
;
1123 /* ieee1394:venNmoNspNverN */
1124 char buf
[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1129 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1131 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1134 #define PUT_ENVP(fmt,val) \
1137 envp[i++] = buffer; \
1138 printed = snprintf(buffer, buffer_size - length, \
1140 if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
1142 length += printed+1; \
1143 buffer += printed+1; \
1146 PUT_ENVP("VENDOR_ID=%06x", ud
->vendor_id
);
1147 PUT_ENVP("MODEL_ID=%06x", ud
->model_id
);
1148 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud
->ne
->guid
);
1149 PUT_ENVP("SPECIFIER_ID=%06x", ud
->specifier_id
);
1150 PUT_ENVP("VERSION=%06x", ud
->version
);
1151 snprintf(buf
, sizeof(buf
), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1156 PUT_ENVP("MODALIAS=%s", buf
);
1167 static int nodemgr_uevent(struct class_device
*cdev
, char **envp
, int num_envp
,
1168 char *buffer
, int buffer_size
)
1173 #endif /* CONFIG_HOTPLUG */
1176 int hpsb_register_protocol(struct hpsb_protocol_driver
*driver
)
1180 /* This will cause a probe for devices */
1181 ret
= driver_register(&driver
->driver
);
1183 nodemgr_create_drv_files(driver
);
1188 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
1190 nodemgr_remove_drv_files(driver
);
1191 /* This will subsequently disconnect all devices that our driver
1192 * is attached to. */
1193 driver_unregister(&driver
->driver
);
1198 * This function updates nodes that were present on the bus before the
1199 * reset and still are after the reset. The nodeid and the config rom
1200 * may have changed, and the drivers managing this device must be
1201 * informed that this device just went through a bus reset, to allow
1202 * the to take whatever actions required.
1204 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1205 struct host_info
*hi
, nodeid_t nodeid
,
1206 unsigned int generation
)
1208 if (ne
->nodeid
!= nodeid
) {
1209 HPSB_DEBUG("Node changed: " NODE_BUS_FMT
" -> " NODE_BUS_FMT
,
1210 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1211 NODE_BUS_ARGS(ne
->host
, nodeid
));
1212 ne
->nodeid
= nodeid
;
1215 if (ne
->busopt
.generation
!= ((be32_to_cpu(csr
->bus_info_data
[2]) >> 4) & 0xf)) {
1216 kfree(ne
->csr
->private);
1217 csr1212_destroy_csr(ne
->csr
);
1220 /* If the node's configrom generation has changed, we
1221 * unregister all the unit directories. */
1222 nodemgr_remove_uds(ne
);
1224 nodemgr_update_bus_options(ne
);
1226 /* Mark the node as new, so it gets re-probed */
1227 ne
->needs_probe
= 1;
1229 /* old cache is valid, so update its generation */
1230 struct nodemgr_csr_info
*ci
= ne
->csr
->private;
1231 ci
->generation
= generation
;
1232 /* free the partially filled now unneeded new cache */
1233 kfree(csr
->private);
1234 csr1212_destroy_csr(csr
);
1238 nodemgr_resume_ne(ne
);
1240 /* Mark the node current */
1241 ne
->generation
= generation
;
1246 static void nodemgr_node_scan_one(struct host_info
*hi
,
1247 nodeid_t nodeid
, int generation
)
1249 struct hpsb_host
*host
= hi
->host
;
1250 struct node_entry
*ne
;
1252 struct csr1212_csr
*csr
;
1253 struct nodemgr_csr_info
*ci
;
1255 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
1260 ci
->nodeid
= nodeid
;
1261 ci
->generation
= generation
;
1262 ci
->speed_unverified
=
1263 host
->speed
[NODEID_TO_NODE(nodeid
)] > IEEE1394_SPEED_100
;
1265 /* We need to detect when the ConfigROM's generation has changed,
1266 * so we only update the node's info when it needs to be. */
1268 csr
= csr1212_create_csr(&nodemgr_csr_ops
, 5 * sizeof(quadlet_t
), ci
);
1269 if (!csr
|| csr1212_parse_csr(csr
) != CSR1212_SUCCESS
) {
1270 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT
,
1271 NODE_BUS_ARGS(host
, nodeid
));
1273 csr1212_destroy_csr(csr
);
1278 if (csr
->bus_info_data
[1] != IEEE1394_BUSID_MAGIC
) {
1279 /* This isn't a 1394 device, but we let it slide. There
1280 * was a report of a device with broken firmware which
1281 * reported '2394' instead of '1394', which is obviously a
1282 * mistake. One would hope that a non-1394 device never
1283 * gets connected to Firewire bus. If someone does, we
1284 * shouldn't be held responsible, so we'll allow it with a
1286 HPSB_WARN("Node " NODE_BUS_FMT
" has invalid busID magic [0x%08x]",
1287 NODE_BUS_ARGS(host
, nodeid
), csr
->bus_info_data
[1]);
1290 guid
= ((u64
)be32_to_cpu(csr
->bus_info_data
[3]) << 32) | be32_to_cpu(csr
->bus_info_data
[4]);
1291 ne
= find_entry_by_guid(guid
);
1293 if (ne
&& ne
->host
!= host
&& ne
->in_limbo
) {
1294 /* Must have moved this device from one host to another */
1295 nodemgr_remove_ne(ne
);
1300 nodemgr_create_node(guid
, csr
, hi
, nodeid
, generation
);
1302 nodemgr_update_node(ne
, csr
, hi
, nodeid
, generation
);
1308 static void nodemgr_node_scan(struct host_info
*hi
, int generation
)
1311 struct hpsb_host
*host
= hi
->host
;
1312 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1313 nodeid_t nodeid
= LOCAL_BUS
;
1315 /* Scan each node on the bus */
1316 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1320 if (!sid
->link_active
) {
1324 nodemgr_node_scan_one(hi
, nodeid
++, generation
);
1329 static void nodemgr_suspend_ne(struct node_entry
*ne
)
1331 struct class_device
*cdev
;
1332 struct unit_directory
*ud
;
1334 HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1335 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1338 device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1340 down_write(&ne
->device
.bus
->subsys
.rwsem
);
1341 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1342 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1347 if (ud
->device
.driver
&&
1348 (!ud
->device
.driver
->suspend
||
1349 ud
->device
.driver
->suspend(&ud
->device
, PMSG_SUSPEND
)))
1350 device_release_driver(&ud
->device
);
1352 up_write(&ne
->device
.bus
->subsys
.rwsem
);
1356 static void nodemgr_resume_ne(struct node_entry
*ne
)
1358 struct class_device
*cdev
;
1359 struct unit_directory
*ud
;
1362 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1364 down_read(&ne
->device
.bus
->subsys
.rwsem
);
1365 list_for_each_entry(cdev
, &nodemgr_ud_class
.children
, node
) {
1366 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1371 if (ud
->device
.driver
&& ud
->device
.driver
->resume
)
1372 ud
->device
.driver
->resume(&ud
->device
);
1374 up_read(&ne
->device
.bus
->subsys
.rwsem
);
1376 HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1377 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
1381 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1383 struct unit_directory
*ud
;
1384 struct hpsb_protocol_driver
*pdrv
;
1385 struct class *class = &nodemgr_ud_class
;
1386 struct class_device
*cdev
;
1388 down_read(&class->subsys
.rwsem
);
1389 list_for_each_entry(cdev
, &class->children
, node
) {
1390 ud
= container_of(cdev
, struct unit_directory
, class_dev
);
1391 if (ud
->ne
!= ne
|| !ud
->device
.driver
)
1394 pdrv
= container_of(ud
->device
.driver
, struct hpsb_protocol_driver
, driver
);
1396 if (pdrv
->update
&& pdrv
->update(ud
)) {
1397 down_write(&ud
->device
.bus
->subsys
.rwsem
);
1398 device_release_driver(&ud
->device
);
1399 up_write(&ud
->device
.bus
->subsys
.rwsem
);
1402 up_read(&class->subsys
.rwsem
);
1406 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1407 * seems like an optional service but in the end it is practically mandatory
1408 * as a consequence of these clauses.
1410 * Note that we cannot do a broadcast write to all nodes at once because some
1411 * pre-1394a devices would hang. */
1412 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1414 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1415 quadlet_t bc_remote
, bc_local
;
1418 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1419 ne
->nodeid
== ne
->host
->node_id
)
1422 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1424 /* Check if the register is implemented and 1394a compliant. */
1425 ret
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &bc_remote
,
1427 if (!ret
&& bc_remote
& cpu_to_be32(0x80000000) &&
1428 bc_remote
!= bc_local
)
1429 hpsb_node_write(ne
, bc_addr
, &bc_local
, sizeof(bc_local
));
1433 static void nodemgr_probe_ne(struct host_info
*hi
, struct node_entry
*ne
, int generation
)
1437 if (ne
->host
!= hi
->host
|| ne
->in_limbo
)
1440 dev
= get_device(&ne
->device
);
1444 nodemgr_irm_write_bc(ne
, generation
);
1446 /* If "needs_probe", then this is either a new or changed node we
1447 * rescan totally. If the generation matches for an existing node
1448 * (one that existed prior to the bus reset) we send update calls
1449 * down to the drivers. Otherwise, this is a dead node and we
1451 if (ne
->needs_probe
)
1452 nodemgr_process_root_directory(hi
, ne
);
1453 else if (ne
->generation
== generation
)
1454 nodemgr_update_pdrv(ne
);
1456 nodemgr_suspend_ne(ne
);
1462 static void nodemgr_node_probe(struct host_info
*hi
, int generation
)
1464 struct hpsb_host
*host
= hi
->host
;
1465 struct class *class = &nodemgr_ne_class
;
1466 struct class_device
*cdev
;
1467 struct node_entry
*ne
;
1469 /* Do some processing of the nodes we've probed. This pulls them
1470 * into the sysfs layer if needed, and can result in processing of
1471 * unit-directories, or just updating the node and it's
1474 * Run updates before probes. Usually, updates are time-critical
1475 * while probes are time-consuming. (Well, those probes need some
1476 * improvement...) */
1478 down_read(&class->subsys
.rwsem
);
1479 list_for_each_entry(cdev
, &class->children
, node
) {
1480 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1481 if (!ne
->needs_probe
)
1482 nodemgr_probe_ne(hi
, ne
, generation
);
1484 list_for_each_entry(cdev
, &class->children
, node
) {
1485 ne
= container_of(cdev
, struct node_entry
, class_dev
);
1486 if (ne
->needs_probe
)
1487 nodemgr_probe_ne(hi
, ne
, generation
);
1489 up_read(&class->subsys
.rwsem
);
1492 /* If we had a bus reset while we were scanning the bus, it is
1493 * possible that we did not probe all nodes. In that case, we
1494 * skip the clean up for now, since we could remove nodes that
1495 * were still on the bus. The bus reset increased hi->reset_sem,
1496 * so there's a bus scan pending which will do the clean up
1499 * Now let's tell the bus to rescan our devices. This may seem
1500 * like overhead, but the driver-model core will only scan a
1501 * device for a driver when either the device is added, or when a
1502 * new driver is added. A bus reset is a good reason to rescan
1503 * devices that were there before. For example, an sbp2 device
1504 * may become available for login, if the host that held it was
1507 if (generation
== get_hpsb_generation(host
))
1508 bus_rescan_devices(&ieee1394_bus_type
);
1513 static int nodemgr_send_resume_packet(struct hpsb_host
*host
)
1515 struct hpsb_packet
*packet
;
1518 packet
= hpsb_make_phypacket(host
,
1519 EXTPHYPACKET_TYPE_RESUME
|
1520 NODEID_TO_NODE(host
->node_id
) << PHYPACKET_PORT_SHIFT
);
1522 packet
->no_waiter
= 1;
1523 packet
->generation
= get_hpsb_generation(host
);
1524 ret
= hpsb_send_packet(packet
);
1527 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1532 /* Perform a few high-level IRM responsibilities. */
1533 static int nodemgr_do_irm_duties(struct hpsb_host
*host
, int cycles
)
1537 /* if irm_id == -1 then there is no IRM on this bus */
1538 if (!host
->is_irm
|| host
->irm_id
== (nodeid_t
)-1)
1541 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1542 host
->csr
.broadcast_channel
|= 0x40000000;
1544 /* If there is no bus manager then we should set the root node's
1545 * force_root bit to promote bus stability per the 1394
1546 * spec. (8.4.2.6) */
1547 if (host
->busmgr_id
== 0xffff && host
->node_count
> 1)
1549 u16 root_node
= host
->node_count
- 1;
1551 /* get cycle master capability flag from root node */
1552 if (host
->is_cycmst
||
1553 (!hpsb_read(host
, LOCAL_BUS
| root_node
, get_hpsb_generation(host
),
1554 (CSR_REGISTER_BASE
+ CSR_CONFIG_ROM
+ 2 * sizeof(quadlet_t
)),
1555 &bc
, sizeof(quadlet_t
)) &&
1556 be32_to_cpu(bc
) & 1 << CSR_CMC_SHIFT
))
1557 hpsb_send_phy_config(host
, root_node
, -1);
1559 HPSB_DEBUG("The root node is not cycle master capable; "
1560 "selecting a new root node and resetting...");
1563 /* Oh screw it! Just leave the bus as it is */
1564 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1568 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1569 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1575 /* Some devices suspend their ports while being connected to an inactive
1576 * host adapter, i.e. if connected before the low-level driver is
1577 * loaded. They become visible either when physically unplugged and
1578 * replugged, or when receiving a resume packet. Send one once. */
1579 if (!host
->resume_packet_sent
&& !nodemgr_send_resume_packet(host
))
1580 host
->resume_packet_sent
= 1;
1585 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1586 * everything we can do, otherwise issue a bus reset and try to become the IRM
1588 static int nodemgr_check_irm_capability(struct hpsb_host
*host
, int cycles
)
1593 if (hpsb_disable_irm
|| host
->is_irm
)
1596 status
= hpsb_read(host
, LOCAL_BUS
| (host
->irm_id
),
1597 get_hpsb_generation(host
),
1598 (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
),
1599 &bc
, sizeof(quadlet_t
));
1601 if (status
< 0 || !(be32_to_cpu(bc
) & 0x80000000)) {
1602 /* The current irm node does not have a valid BROADCAST_CHANNEL
1603 * register and we do, so reset the bus with force_root set */
1604 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1607 /* Oh screw it! Just leave the bus as it is */
1608 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1612 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1613 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1621 static int nodemgr_host_thread(void *__hi
)
1623 struct host_info
*hi
= (struct host_info
*)__hi
;
1624 struct hpsb_host
*host
= hi
->host
;
1625 int reset_cycles
= 0;
1627 /* No userlevel access needed */
1628 daemonize(hi
->daemon_name
);
1630 /* Setup our device-model entries */
1631 nodemgr_create_host_dev_files(host
);
1633 /* Sit and wait for a signal to probe the nodes on the bus. This
1634 * happens when we get a bus reset. */
1636 unsigned int generation
= 0;
1639 if (down_interruptible(&hi
->reset_sem
) ||
1640 down_interruptible(&nodemgr_serialize
)) {
1641 if (try_to_freeze())
1643 printk("NodeMgr: received unexpected signal?!\n" );
1648 up(&nodemgr_serialize
);
1652 /* Pause for 1/4 second in 1/16 second intervals,
1653 * to make sure things settle down. */
1654 for (i
= 0; i
< 4 ; i
++) {
1655 set_current_state(TASK_INTERRUPTIBLE
);
1656 if (msleep_interruptible(63)) {
1657 up(&nodemgr_serialize
);
1661 /* Now get the generation in which the node ID's we collect
1662 * are valid. During the bus scan we will use this generation
1663 * for the read transactions, so that if another reset occurs
1664 * during the scan the transactions will fail instead of
1665 * returning bogus data. */
1666 generation
= get_hpsb_generation(host
);
1668 /* If we get a reset before we are done waiting, then
1669 * start the the waiting over again */
1670 while (!down_trylock(&hi
->reset_sem
))
1673 /* Check the kill_me again */
1675 up(&nodemgr_serialize
);
1680 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1681 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
1683 up(&nodemgr_serialize
);
1688 /* Scan our nodes to get the bus options and create node
1689 * entries. This does not do the sysfs stuff, since that
1690 * would trigger uevents and such, which is a bad idea at
1692 nodemgr_node_scan(hi
, generation
);
1694 /* This actually does the full probe, with sysfs
1696 nodemgr_node_probe(hi
, generation
);
1698 /* Update some of our sysfs symlinks */
1699 nodemgr_update_host_dev_links(host
);
1701 up(&nodemgr_serialize
);
1705 HPSB_VERBOSE("NodeMgr: Exiting thread");
1707 complete_and_exit(&hi
->exited
, 0);
1710 int nodemgr_for_each_host(void *__data
, int (*cb
)(struct hpsb_host
*, void *))
1712 struct class *class = &hpsb_host_class
;
1713 struct class_device
*cdev
;
1714 struct hpsb_host
*host
;
1717 down_read(&class->subsys
.rwsem
);
1718 list_for_each_entry(cdev
, &class->children
, node
) {
1719 host
= container_of(cdev
, struct hpsb_host
, class_dev
);
1721 if ((error
= cb(host
, __data
)))
1724 up_read(&class->subsys
.rwsem
);
1729 /* The following four convenience functions use a struct node_entry
1730 * for addressing a node on the bus. They are intended for use by any
1731 * process context, not just the nodemgr thread, so we need to be a
1732 * little careful when reading out the node ID and generation. The
1733 * thing that can go wrong is that we get the node ID, then a bus
1734 * reset occurs, and then we read the generation. The node ID is
1735 * possibly invalid, but the generation is current, and we end up
1736 * sending a packet to a the wrong node.
1738 * The solution is to make sure we read the generation first, so that
1739 * if a reset occurs in the process, we end up with a stale generation
1740 * and the transactions will fail instead of silently using wrong node
1744 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*pkt
)
1746 pkt
->host
= ne
->host
;
1747 pkt
->generation
= ne
->generation
;
1749 pkt
->node_id
= ne
->nodeid
;
1752 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1753 quadlet_t
*buffer
, size_t length
)
1755 unsigned int generation
= ne
->generation
;
1758 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1759 addr
, buffer
, length
);
1762 static void nodemgr_add_host(struct hpsb_host
*host
)
1764 struct host_info
*hi
;
1766 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1769 HPSB_ERR ("NodeMgr: out of memory in add host");
1774 init_completion(&hi
->exited
);
1775 sema_init(&hi
->reset_sem
, 0);
1777 sprintf(hi
->daemon_name
, "knodemgrd_%d", host
->id
);
1779 hi
->pid
= kernel_thread(nodemgr_host_thread
, hi
, CLONE_KERNEL
);
1782 HPSB_ERR ("NodeMgr: failed to start %s thread for %s",
1783 hi
->daemon_name
, host
->driver
->name
);
1784 hpsb_destroy_hostinfo(&nodemgr_highlevel
, host
);
1791 static void nodemgr_host_reset(struct hpsb_host
*host
)
1793 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1796 HPSB_VERBOSE("NodeMgr: Processing host reset for %s", hi
->daemon_name
);
1799 HPSB_ERR ("NodeMgr: could not process reset of unused host");
1804 static void nodemgr_remove_host(struct hpsb_host
*host
)
1806 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1813 wait_for_completion(&hi
->exited
);
1814 nodemgr_remove_host_dev(&host
->device
);
1817 HPSB_ERR("NodeMgr: host %s does not exist, cannot remove",
1818 host
->driver
->name
);
1823 static struct hpsb_highlevel nodemgr_highlevel
= {
1824 .name
= "Node manager",
1825 .add_host
= nodemgr_add_host
,
1826 .host_reset
= nodemgr_host_reset
,
1827 .remove_host
= nodemgr_remove_host
,
1830 int init_ieee1394_nodemgr(void)
1834 ret
= class_register(&nodemgr_ne_class
);
1838 ret
= class_register(&nodemgr_ud_class
);
1840 class_unregister(&nodemgr_ne_class
);
1844 hpsb_register_highlevel(&nodemgr_highlevel
);
1849 void cleanup_ieee1394_nodemgr(void)
1851 hpsb_unregister_highlevel(&nodemgr_highlevel
);
1853 class_unregister(&nodemgr_ud_class
);
1854 class_unregister(&nodemgr_ne_class
);