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/mutex.h>
20 #include <linux/freezer.h>
21 #include <linux/semaphore.h>
22 #include <asm/atomic.h>
25 #include "highlevel.h"
28 #include "ieee1394_core.h"
29 #include "ieee1394_hotplug.h"
30 #include "ieee1394_types.h"
31 #include "ieee1394_transactions.h"
34 static int ignore_drivers
;
35 module_param(ignore_drivers
, int, S_IRUGO
| S_IWUSR
);
36 MODULE_PARM_DESC(ignore_drivers
, "Disable automatic probing for drivers.");
38 struct nodemgr_csr_info
{
39 struct hpsb_host
*host
;
41 unsigned int generation
;
42 unsigned int speed_unverified
:1;
47 * Correct the speed map entry. This is necessary
48 * - for nodes with link speed < phy speed,
49 * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
50 * A possible speed is determined by trial and error, using quadlet reads.
52 static int nodemgr_check_speed(struct nodemgr_csr_info
*ci
, u64 addr
,
56 u8 i
, *speed
, old_speed
, good_speed
;
59 speed
= &(ci
->host
->speed
[NODEID_TO_NODE(ci
->nodeid
)]);
61 good_speed
= IEEE1394_SPEED_MAX
+ 1;
63 /* Try every speed from S100 to old_speed.
64 * If we did it the other way around, a too low speed could be caught
65 * if the retry succeeded for some other reason, e.g. because the link
66 * just finished its initialization. */
67 for (i
= IEEE1394_SPEED_100
; i
<= old_speed
; i
++) {
69 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
70 &q
, sizeof(quadlet_t
));
76 if (good_speed
<= IEEE1394_SPEED_MAX
) {
77 HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT
" yields %s",
78 NODE_BUS_ARGS(ci
->host
, ci
->nodeid
),
79 hpsb_speedto_str
[good_speed
]);
81 ci
->speed_unverified
= 0;
88 static int nodemgr_bus_read(struct csr1212_csr
*csr
, u64 addr
, u16 length
,
89 void *buffer
, void *__ci
)
91 struct nodemgr_csr_info
*ci
= (struct nodemgr_csr_info
*)__ci
;
95 error
= hpsb_read(ci
->host
, ci
->nodeid
, ci
->generation
, addr
,
98 ci
->speed_unverified
= 0;
101 /* Give up after 3rd failure. */
105 /* The ieee1394_core guessed the node's speed capability from
106 * the self ID. Check whether a lower speed works. */
107 if (ci
->speed_unverified
&& length
== sizeof(quadlet_t
)) {
108 error
= nodemgr_check_speed(ci
, addr
, buffer
);
112 if (msleep_interruptible(334))
118 static int nodemgr_get_max_rom(quadlet_t
*bus_info_data
, void *__ci
)
120 return (be32_to_cpu(bus_info_data
[2]) >> 8) & 0x3;
123 static struct csr1212_bus_ops nodemgr_csr_ops
= {
124 .bus_read
= nodemgr_bus_read
,
125 .get_max_rom
= nodemgr_get_max_rom
130 * Basically what we do here is start off retrieving the bus_info block.
131 * From there will fill in some info about the node, verify it is of IEEE
132 * 1394 type, and that the crc checks out ok. After that we start off with
133 * the root directory, and subdirectories. To do this, we retrieve the
134 * quadlet header for a directory, find out the length, and retrieve the
135 * complete directory entry (be it a leaf or a directory). We then process
136 * it and add the info to our structure for that particular node.
138 * We verify CRC's along the way for each directory/block/leaf. The entire
139 * node structure is generic, and simply stores the information in a way
140 * that's easy to parse by the protocol interface.
144 * The nodemgr relies heavily on the Driver Model for device callbacks and
145 * driver/device mappings. The old nodemgr used to handle all this itself,
146 * but now we are much simpler because of the LDM.
150 struct hpsb_host
*host
;
151 struct list_head list
;
152 struct task_struct
*thread
;
155 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
);
156 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
);
158 struct bus_type ieee1394_bus_type
= {
160 .match
= nodemgr_bus_match
,
163 static void host_cls_release(struct device
*dev
)
165 put_device(&container_of((dev
), struct hpsb_host
, host_dev
)->device
);
168 struct class hpsb_host_class
= {
169 .name
= "ieee1394_host",
170 .dev_release
= host_cls_release
,
173 static void ne_cls_release(struct device
*dev
)
175 put_device(&container_of((dev
), struct node_entry
, node_dev
)->device
);
178 static struct class nodemgr_ne_class
= {
179 .name
= "ieee1394_node",
180 .dev_release
= ne_cls_release
,
183 static void ud_cls_release(struct device
*dev
)
185 put_device(&container_of((dev
), struct unit_directory
, unit_dev
)->device
);
188 /* The name here is only so that unit directory hotplug works with old
189 * style hotplug, which only ever did unit directories anyway.
191 static struct class nodemgr_ud_class
= {
193 .dev_release
= ud_cls_release
,
194 .dev_uevent
= nodemgr_uevent
,
197 static struct hpsb_highlevel nodemgr_highlevel
;
200 static void nodemgr_release_ud(struct device
*dev
)
202 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
204 if (ud
->vendor_name_kv
)
205 csr1212_release_keyval(ud
->vendor_name_kv
);
206 if (ud
->model_name_kv
)
207 csr1212_release_keyval(ud
->model_name_kv
);
212 static void nodemgr_release_ne(struct device
*dev
)
214 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
216 if (ne
->vendor_name_kv
)
217 csr1212_release_keyval(ne
->vendor_name_kv
);
223 static void nodemgr_release_host(struct device
*dev
)
225 struct hpsb_host
*host
= container_of(dev
, struct hpsb_host
, device
);
227 csr1212_destroy_csr(host
->csr
.rom
);
232 static int nodemgr_ud_platform_data
;
234 static struct device nodemgr_dev_template_ud
= {
235 .bus
= &ieee1394_bus_type
,
236 .release
= nodemgr_release_ud
,
237 .platform_data
= &nodemgr_ud_platform_data
,
240 static struct device nodemgr_dev_template_ne
= {
241 .bus
= &ieee1394_bus_type
,
242 .release
= nodemgr_release_ne
,
245 /* This dummy driver prevents the host devices from being scanned. We have no
246 * useful drivers for them yet, and there would be a deadlock possible if the
247 * driver core scans the host device while the host's low-level driver (i.e.
248 * the host's parent device) is being removed. */
249 static struct device_driver nodemgr_mid_layer_driver
= {
250 .bus
= &ieee1394_bus_type
,
252 .owner
= THIS_MODULE
,
255 struct device nodemgr_dev_template_host
= {
256 .bus
= &ieee1394_bus_type
,
257 .release
= nodemgr_release_host
,
261 #define fw_attr(class, class_type, field, type, format_string) \
262 static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
265 class = container_of(dev, class_type, device); \
266 return sprintf(buf, format_string, (type)class->field); \
268 static struct device_attribute dev_attr_##class##_##field = { \
269 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
270 .show = fw_show_##class##_##field, \
273 #define fw_attr_td(class, class_type, td_kv) \
274 static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
277 class_type *class = container_of(dev, class_type, device); \
278 len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
280 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
282 while (buf[len - 1] == '\0') \
288 static struct device_attribute dev_attr_##class##_##td_kv = { \
289 .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
290 .show = fw_show_##class##_##td_kv, \
294 #define fw_drv_attr(field, type, format_string) \
295 static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
297 struct hpsb_protocol_driver *driver; \
298 driver = container_of(drv, struct hpsb_protocol_driver, driver); \
299 return sprintf(buf, format_string, (type)driver->field);\
301 static struct driver_attribute driver_attr_drv_##field = { \
302 .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
303 .show = fw_drv_show_##field, \
307 static ssize_t
fw_show_ne_bus_options(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
309 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
311 return sprintf(buf
, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
312 "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
314 ne
->busopt
.cmc
, ne
->busopt
.isc
, ne
->busopt
.bmc
,
315 ne
->busopt
.pmc
, ne
->busopt
.generation
, ne
->busopt
.lnkspd
,
318 ne
->busopt
.cyc_clk_acc
);
320 static DEVICE_ATTR(bus_options
,S_IRUGO
,fw_show_ne_bus_options
,NULL
);
323 #ifdef HPSB_DEBUG_TLABELS
324 static ssize_t
fw_show_ne_tlabels_free(struct device
*dev
,
325 struct device_attribute
*attr
, char *buf
)
327 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
329 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
332 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
333 tf
= 64 - bitmap_weight(tp
, 64);
334 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
336 return sprintf(buf
, "%d\n", tf
);
338 static DEVICE_ATTR(tlabels_free
,S_IRUGO
,fw_show_ne_tlabels_free
,NULL
);
341 static ssize_t
fw_show_ne_tlabels_mask(struct device
*dev
,
342 struct device_attribute
*attr
, char *buf
)
344 struct node_entry
*ne
= container_of(dev
, struct node_entry
, device
);
346 unsigned long *tp
= ne
->host
->tl_pool
[NODEID_TO_NODE(ne
->nodeid
)].map
;
349 spin_lock_irqsave(&hpsb_tlabel_lock
, flags
);
350 #if (BITS_PER_LONG <= 32)
351 tm
= ((u64
)tp
[0] << 32) + tp
[1];
355 spin_unlock_irqrestore(&hpsb_tlabel_lock
, flags
);
357 return sprintf(buf
, "0x%016llx\n", (unsigned long long)tm
);
359 static DEVICE_ATTR(tlabels_mask
, S_IRUGO
, fw_show_ne_tlabels_mask
, NULL
);
360 #endif /* HPSB_DEBUG_TLABELS */
363 static ssize_t
fw_set_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, const char *buf
, size_t count
)
365 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
366 int state
= simple_strtoul(buf
, NULL
, 10);
369 ud
->ignore_driver
= 1;
370 device_release_driver(dev
);
371 } else if (state
== 0)
372 ud
->ignore_driver
= 0;
376 static ssize_t
fw_get_ignore_driver(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
378 struct unit_directory
*ud
= container_of(dev
, struct unit_directory
, device
);
380 return sprintf(buf
, "%d\n", ud
->ignore_driver
);
382 static DEVICE_ATTR(ignore_driver
, S_IWUSR
| S_IRUGO
, fw_get_ignore_driver
, fw_set_ignore_driver
);
385 static ssize_t
fw_set_rescan(struct bus_type
*bus
, const char *buf
,
390 if (simple_strtoul(buf
, NULL
, 10) == 1)
391 error
= bus_rescan_devices(&ieee1394_bus_type
);
392 return error
? error
: count
;
394 static ssize_t
fw_get_rescan(struct bus_type
*bus
, char *buf
)
396 return sprintf(buf
, "You can force a rescan of the bus for "
397 "drivers by writing a 1 to this file\n");
399 static BUS_ATTR(rescan
, S_IWUSR
| S_IRUGO
, fw_get_rescan
, fw_set_rescan
);
402 static ssize_t
fw_set_ignore_drivers(struct bus_type
*bus
, const char *buf
, size_t count
)
404 int state
= simple_strtoul(buf
, NULL
, 10);
413 static ssize_t
fw_get_ignore_drivers(struct bus_type
*bus
, char *buf
)
415 return sprintf(buf
, "%d\n", ignore_drivers
);
417 static BUS_ATTR(ignore_drivers
, S_IWUSR
| S_IRUGO
, fw_get_ignore_drivers
, fw_set_ignore_drivers
);
420 struct bus_attribute
*const fw_bus_attrs
[] = {
422 &bus_attr_ignore_drivers
,
427 fw_attr(ne
, struct node_entry
, capabilities
, unsigned int, "0x%06x\n")
428 fw_attr(ne
, struct node_entry
, nodeid
, unsigned int, "0x%04x\n")
430 fw_attr(ne
, struct node_entry
, vendor_id
, unsigned int, "0x%06x\n")
431 fw_attr_td(ne
, struct node_entry
, vendor_name_kv
)
433 fw_attr(ne
, struct node_entry
, guid
, unsigned long long, "0x%016Lx\n")
434 fw_attr(ne
, struct node_entry
, guid_vendor_id
, unsigned int, "0x%06x\n")
435 fw_attr(ne
, struct node_entry
, in_limbo
, int, "%d\n");
437 static struct device_attribute
*const fw_ne_attrs
[] = {
439 &dev_attr_ne_guid_vendor_id
,
440 &dev_attr_ne_capabilities
,
441 &dev_attr_ne_vendor_id
,
443 &dev_attr_bus_options
,
444 #ifdef HPSB_DEBUG_TLABELS
445 &dev_attr_tlabels_free
,
446 &dev_attr_tlabels_mask
,
452 fw_attr(ud
, struct unit_directory
, address
, unsigned long long, "0x%016Lx\n")
453 fw_attr(ud
, struct unit_directory
, length
, int, "%d\n")
454 /* These are all dependent on the value being provided */
455 fw_attr(ud
, struct unit_directory
, vendor_id
, unsigned int, "0x%06x\n")
456 fw_attr(ud
, struct unit_directory
, model_id
, unsigned int, "0x%06x\n")
457 fw_attr(ud
, struct unit_directory
, specifier_id
, unsigned int, "0x%06x\n")
458 fw_attr(ud
, struct unit_directory
, version
, unsigned int, "0x%06x\n")
459 fw_attr_td(ud
, struct unit_directory
, vendor_name_kv
)
460 fw_attr_td(ud
, struct unit_directory
, model_name_kv
)
462 static struct device_attribute
*const fw_ud_attrs
[] = {
463 &dev_attr_ud_address
,
465 &dev_attr_ignore_driver
,
469 fw_attr(host
, struct hpsb_host
, node_count
, int, "%d\n")
470 fw_attr(host
, struct hpsb_host
, selfid_count
, int, "%d\n")
471 fw_attr(host
, struct hpsb_host
, nodes_active
, int, "%d\n")
472 fw_attr(host
, struct hpsb_host
, in_bus_reset
, int, "%d\n")
473 fw_attr(host
, struct hpsb_host
, is_root
, int, "%d\n")
474 fw_attr(host
, struct hpsb_host
, is_cycmst
, int, "%d\n")
475 fw_attr(host
, struct hpsb_host
, is_irm
, int, "%d\n")
476 fw_attr(host
, struct hpsb_host
, is_busmgr
, int, "%d\n")
478 static struct device_attribute
*const fw_host_attrs
[] = {
479 &dev_attr_host_node_count
,
480 &dev_attr_host_selfid_count
,
481 &dev_attr_host_nodes_active
,
482 &dev_attr_host_in_bus_reset
,
483 &dev_attr_host_is_root
,
484 &dev_attr_host_is_cycmst
,
485 &dev_attr_host_is_irm
,
486 &dev_attr_host_is_busmgr
,
490 static ssize_t
fw_show_drv_device_ids(struct device_driver
*drv
, char *buf
)
492 struct hpsb_protocol_driver
*driver
;
493 struct ieee1394_device_id
*id
;
497 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
498 id
= driver
->id_table
;
502 for (; id
->match_flags
!= 0; id
++) {
505 if (id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) {
506 length
+= sprintf(scratch
, "vendor_id=0x%06x", id
->vendor_id
);
507 scratch
= buf
+ length
;
511 if (id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) {
512 length
+= sprintf(scratch
, "%smodel_id=0x%06x",
513 need_coma
++ ? "," : "",
515 scratch
= buf
+ length
;
518 if (id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) {
519 length
+= sprintf(scratch
, "%sspecifier_id=0x%06x",
520 need_coma
++ ? "," : "",
522 scratch
= buf
+ length
;
525 if (id
->match_flags
& IEEE1394_MATCH_VERSION
) {
526 length
+= sprintf(scratch
, "%sversion=0x%06x",
527 need_coma
++ ? "," : "",
529 scratch
= buf
+ length
;
540 static DRIVER_ATTR(device_ids
,S_IRUGO
,fw_show_drv_device_ids
,NULL
);
543 fw_drv_attr(name
, const char *, "%s\n")
545 static struct driver_attribute
*const fw_drv_attrs
[] = {
546 &driver_attr_drv_name
,
547 &driver_attr_device_ids
,
551 static void nodemgr_create_drv_files(struct hpsb_protocol_driver
*driver
)
553 struct device_driver
*drv
= &driver
->driver
;
556 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
557 if (driver_create_file(drv
, fw_drv_attrs
[i
]))
561 HPSB_ERR("Failed to add sysfs attribute");
565 static void nodemgr_remove_drv_files(struct hpsb_protocol_driver
*driver
)
567 struct device_driver
*drv
= &driver
->driver
;
570 for (i
= 0; i
< ARRAY_SIZE(fw_drv_attrs
); i
++)
571 driver_remove_file(drv
, fw_drv_attrs
[i
]);
575 static void nodemgr_create_ne_dev_files(struct node_entry
*ne
)
577 struct device
*dev
= &ne
->device
;
580 for (i
= 0; i
< ARRAY_SIZE(fw_ne_attrs
); i
++)
581 if (device_create_file(dev
, fw_ne_attrs
[i
]))
585 HPSB_ERR("Failed to add sysfs attribute");
589 static void nodemgr_create_host_dev_files(struct hpsb_host
*host
)
591 struct device
*dev
= &host
->device
;
594 for (i
= 0; i
< ARRAY_SIZE(fw_host_attrs
); i
++)
595 if (device_create_file(dev
, fw_host_attrs
[i
]))
599 HPSB_ERR("Failed to add sysfs attribute");
603 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
606 static void nodemgr_update_host_dev_links(struct hpsb_host
*host
)
608 struct device
*dev
= &host
->device
;
609 struct node_entry
*ne
;
611 sysfs_remove_link(&dev
->kobj
, "irm_id");
612 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
613 sysfs_remove_link(&dev
->kobj
, "host_id");
615 if ((ne
= find_entry_by_nodeid(host
, host
->irm_id
)) &&
616 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "irm_id"))
618 if ((ne
= find_entry_by_nodeid(host
, host
->busmgr_id
)) &&
619 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "busmgr_id"))
621 if ((ne
= find_entry_by_nodeid(host
, host
->node_id
)) &&
622 sysfs_create_link(&dev
->kobj
, &ne
->device
.kobj
, "host_id"))
626 HPSB_ERR("Failed to update sysfs attributes for host %d", host
->id
);
629 static void nodemgr_create_ud_dev_files(struct unit_directory
*ud
)
631 struct device
*dev
= &ud
->device
;
634 for (i
= 0; i
< ARRAY_SIZE(fw_ud_attrs
); i
++)
635 if (device_create_file(dev
, fw_ud_attrs
[i
]))
637 if (ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
)
638 if (device_create_file(dev
, &dev_attr_ud_specifier_id
))
640 if (ud
->flags
& UNIT_DIRECTORY_VERSION
)
641 if (device_create_file(dev
, &dev_attr_ud_version
))
643 if (ud
->flags
& UNIT_DIRECTORY_VENDOR_ID
) {
644 if (device_create_file(dev
, &dev_attr_ud_vendor_id
))
646 if (ud
->vendor_name_kv
&&
647 device_create_file(dev
, &dev_attr_ud_vendor_name_kv
))
650 if (ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) {
651 if (device_create_file(dev
, &dev_attr_ud_model_id
))
653 if (ud
->model_name_kv
&&
654 device_create_file(dev
, &dev_attr_ud_model_name_kv
))
659 HPSB_ERR("Failed to add sysfs attribute");
663 static int nodemgr_bus_match(struct device
* dev
, struct device_driver
* drv
)
665 struct hpsb_protocol_driver
*driver
;
666 struct unit_directory
*ud
;
667 struct ieee1394_device_id
*id
;
669 /* We only match unit directories */
670 if (dev
->platform_data
!= &nodemgr_ud_platform_data
)
673 ud
= container_of(dev
, struct unit_directory
, device
);
674 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
677 /* We only match drivers of type hpsb_protocol_driver */
678 if (drv
== &nodemgr_mid_layer_driver
)
681 driver
= container_of(drv
, struct hpsb_protocol_driver
, driver
);
682 id
= driver
->id_table
;
686 for (; id
->match_flags
!= 0; id
++) {
687 if ((id
->match_flags
& IEEE1394_MATCH_VENDOR_ID
) &&
688 id
->vendor_id
!= ud
->vendor_id
)
691 if ((id
->match_flags
& IEEE1394_MATCH_MODEL_ID
) &&
692 id
->model_id
!= ud
->model_id
)
695 if ((id
->match_flags
& IEEE1394_MATCH_SPECIFIER_ID
) &&
696 id
->specifier_id
!= ud
->specifier_id
)
699 if ((id
->match_flags
& IEEE1394_MATCH_VERSION
) &&
700 id
->version
!= ud
->version
)
710 static DEFINE_MUTEX(nodemgr_serialize_remove_uds
);
712 static int match_ne(struct device
*dev
, void *data
)
714 struct unit_directory
*ud
;
715 struct node_entry
*ne
= data
;
717 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
721 static void nodemgr_remove_uds(struct node_entry
*ne
)
724 struct unit_directory
*ud
;
726 /* Use class_find device to iterate the devices. Since this code
727 * may be called from other contexts besides the knodemgrds,
728 * protect it by nodemgr_serialize_remove_uds.
730 mutex_lock(&nodemgr_serialize_remove_uds
);
732 dev
= class_find_device(&nodemgr_ud_class
, NULL
, ne
, match_ne
);
735 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
737 device_unregister(&ud
->unit_dev
);
738 device_unregister(&ud
->device
);
740 mutex_unlock(&nodemgr_serialize_remove_uds
);
744 static void nodemgr_remove_ne(struct node_entry
*ne
)
748 dev
= get_device(&ne
->device
);
752 HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
753 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
), (unsigned long long)ne
->guid
);
754 nodemgr_remove_uds(ne
);
756 device_unregister(&ne
->node_dev
);
757 device_unregister(dev
);
762 static int remove_host_dev(struct device
*dev
, void *data
)
764 if (dev
->bus
== &ieee1394_bus_type
)
765 nodemgr_remove_ne(container_of(dev
, struct node_entry
,
770 static void nodemgr_remove_host_dev(struct device
*dev
)
772 device_for_each_child(dev
, NULL
, remove_host_dev
);
773 sysfs_remove_link(&dev
->kobj
, "irm_id");
774 sysfs_remove_link(&dev
->kobj
, "busmgr_id");
775 sysfs_remove_link(&dev
->kobj
, "host_id");
779 static void nodemgr_update_bus_options(struct node_entry
*ne
)
781 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
782 static const u16 mr
[] = { 4, 64, 1024, 0};
784 quadlet_t busoptions
= be32_to_cpu(ne
->csr
->bus_info_data
[2]);
786 ne
->busopt
.irmc
= (busoptions
>> 31) & 1;
787 ne
->busopt
.cmc
= (busoptions
>> 30) & 1;
788 ne
->busopt
.isc
= (busoptions
>> 29) & 1;
789 ne
->busopt
.bmc
= (busoptions
>> 28) & 1;
790 ne
->busopt
.pmc
= (busoptions
>> 27) & 1;
791 ne
->busopt
.cyc_clk_acc
= (busoptions
>> 16) & 0xff;
792 ne
->busopt
.max_rec
= 1 << (((busoptions
>> 12) & 0xf) + 1);
793 ne
->busopt
.max_rom
= (busoptions
>> 8) & 0x3;
794 ne
->busopt
.generation
= (busoptions
>> 4) & 0xf;
795 ne
->busopt
.lnkspd
= busoptions
& 0x7;
797 HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
798 "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
799 busoptions
, ne
->busopt
.irmc
, ne
->busopt
.cmc
,
800 ne
->busopt
.isc
, ne
->busopt
.bmc
, ne
->busopt
.pmc
,
801 ne
->busopt
.cyc_clk_acc
, ne
->busopt
.max_rec
,
802 mr
[ne
->busopt
.max_rom
],
803 ne
->busopt
.generation
, ne
->busopt
.lnkspd
);
807 static struct node_entry
*nodemgr_create_node(octlet_t guid
,
808 struct csr1212_csr
*csr
, struct hpsb_host
*host
,
809 nodeid_t nodeid
, unsigned int generation
)
811 struct node_entry
*ne
;
813 ne
= kzalloc(sizeof(*ne
), GFP_KERNEL
);
819 ne
->generation
= generation
;
820 ne
->needs_probe
= true;
823 ne
->guid_vendor_id
= (guid
>> 40) & 0xffffff;
826 memcpy(&ne
->device
, &nodemgr_dev_template_ne
,
828 ne
->device
.parent
= &host
->device
;
829 dev_set_name(&ne
->device
, "%016Lx", (unsigned long long)(ne
->guid
));
831 ne
->node_dev
.parent
= &ne
->device
;
832 ne
->node_dev
.class = &nodemgr_ne_class
;
833 dev_set_name(&ne
->node_dev
, "%016Lx", (unsigned long long)(ne
->guid
));
835 if (device_register(&ne
->device
))
837 if (device_register(&ne
->node_dev
))
838 goto fail_classdevreg
;
839 get_device(&ne
->device
);
841 nodemgr_create_ne_dev_files(ne
);
843 nodemgr_update_bus_options(ne
);
845 HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
846 (host
->node_id
== nodeid
) ? "Host" : "Node",
847 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
852 device_unregister(&ne
->device
);
856 HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
857 NODE_BUS_ARGS(host
, nodeid
), (unsigned long long)guid
);
862 static int match_ne_guid(struct device
*dev
, void *data
)
864 struct node_entry
*ne
;
867 ne
= container_of(dev
, struct node_entry
, node_dev
);
868 return ne
->guid
== *guid
;
871 static struct node_entry
*find_entry_by_guid(u64 guid
)
874 struct node_entry
*ne
;
876 dev
= class_find_device(&nodemgr_ne_class
, NULL
, &guid
, match_ne_guid
);
879 ne
= container_of(dev
, struct node_entry
, node_dev
);
885 struct match_nodeid_parameter
{
886 struct hpsb_host
*host
;
890 static int match_ne_nodeid(struct device
*dev
, void *data
)
893 struct node_entry
*ne
;
894 struct match_nodeid_parameter
*p
= data
;
898 ne
= container_of(dev
, struct node_entry
, node_dev
);
899 if (ne
->host
== p
->host
&& ne
->nodeid
== p
->nodeid
)
905 static struct node_entry
*find_entry_by_nodeid(struct hpsb_host
*host
,
909 struct node_entry
*ne
;
910 struct match_nodeid_parameter p
;
915 dev
= class_find_device(&nodemgr_ne_class
, NULL
, &p
, match_ne_nodeid
);
918 ne
= container_of(dev
, struct node_entry
, node_dev
);
925 static void nodemgr_register_device(struct node_entry
*ne
,
926 struct unit_directory
*ud
, struct device
*parent
)
928 memcpy(&ud
->device
, &nodemgr_dev_template_ud
,
931 ud
->device
.parent
= parent
;
933 dev_set_name(&ud
->device
, "%s-%u", dev_name(&ne
->device
), ud
->id
);
935 ud
->unit_dev
.parent
= &ud
->device
;
936 ud
->unit_dev
.class = &nodemgr_ud_class
;
937 dev_set_name(&ud
->unit_dev
, "%s-%u", dev_name(&ne
->device
), ud
->id
);
939 if (device_register(&ud
->device
))
941 if (device_register(&ud
->unit_dev
))
942 goto fail_classdevreg
;
943 get_device(&ud
->device
);
945 nodemgr_create_ud_dev_files(ud
);
950 device_unregister(&ud
->device
);
952 HPSB_ERR("Failed to create unit %s", dev_name(&ud
->device
));
956 /* This implementation currently only scans the config rom and its
957 * immediate unit directories looking for software_id and
958 * software_version entries, in order to get driver autoloading working. */
959 static struct unit_directory
*nodemgr_process_unit_directory
960 (struct node_entry
*ne
, struct csr1212_keyval
*ud_kv
,
961 unsigned int *id
, struct unit_directory
*parent
)
963 struct unit_directory
*ud
;
964 struct unit_directory
*ud_child
= NULL
;
965 struct csr1212_dentry
*dentry
;
966 struct csr1212_keyval
*kv
;
969 ud
= kzalloc(sizeof(*ud
), GFP_KERNEL
);
971 goto unit_directory_error
;
974 ud
->ignore_driver
= ignore_drivers
;
975 ud
->address
= ud_kv
->offset
+ CSR1212_REGISTER_SPACE_BASE
;
976 ud
->directory_id
= ud
->address
& 0xffffff;
980 csr1212_for_each_dir_entry(ne
->csr
, kv
, ud_kv
, dentry
) {
981 switch (kv
->key
.id
) {
982 case CSR1212_KV_ID_VENDOR
:
983 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
984 ud
->vendor_id
= kv
->value
.immediate
;
985 ud
->flags
|= UNIT_DIRECTORY_VENDOR_ID
;
989 case CSR1212_KV_ID_MODEL
:
990 ud
->model_id
= kv
->value
.immediate
;
991 ud
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
994 case CSR1212_KV_ID_SPECIFIER_ID
:
995 ud
->specifier_id
= kv
->value
.immediate
;
996 ud
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
999 case CSR1212_KV_ID_VERSION
:
1000 ud
->version
= kv
->value
.immediate
;
1001 ud
->flags
|= UNIT_DIRECTORY_VERSION
;
1004 case CSR1212_KV_ID_DESCRIPTOR
:
1005 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1006 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1007 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1008 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1009 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1010 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1011 switch (last_key_id
) {
1012 case CSR1212_KV_ID_VENDOR
:
1013 csr1212_keep_keyval(kv
);
1014 ud
->vendor_name_kv
= kv
;
1017 case CSR1212_KV_ID_MODEL
:
1018 csr1212_keep_keyval(kv
);
1019 ud
->model_name_kv
= kv
;
1023 } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
1026 case CSR1212_KV_ID_DEPENDENT_INFO
:
1027 /* Logical Unit Number */
1028 if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1029 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
) {
1030 ud_child
= kmemdup(ud
, sizeof(*ud_child
), GFP_KERNEL
);
1032 goto unit_directory_error
;
1033 nodemgr_register_device(ne
, ud_child
, &ne
->device
);
1038 ud
->lun
= kv
->value
.immediate
;
1039 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN
;
1041 /* Logical Unit Directory */
1042 } else if (kv
->key
.type
== CSR1212_KV_TYPE_DIRECTORY
) {
1043 /* This should really be done in SBP2 as this is
1044 * doing SBP2 specific parsing.
1047 /* first register the parent unit */
1048 ud
->flags
|= UNIT_DIRECTORY_HAS_LUN_DIRECTORY
;
1049 if (ud
->device
.bus
!= &ieee1394_bus_type
)
1050 nodemgr_register_device(ne
, ud
, &ne
->device
);
1052 /* process the child unit */
1053 ud_child
= nodemgr_process_unit_directory(ne
, kv
, id
, ud
);
1055 if (ud_child
== NULL
)
1058 /* inherit unspecified values, the driver core picks it up */
1059 if ((ud
->flags
& UNIT_DIRECTORY_MODEL_ID
) &&
1060 !(ud_child
->flags
& UNIT_DIRECTORY_MODEL_ID
))
1062 ud_child
->flags
|= UNIT_DIRECTORY_MODEL_ID
;
1063 ud_child
->model_id
= ud
->model_id
;
1065 if ((ud
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
) &&
1066 !(ud_child
->flags
& UNIT_DIRECTORY_SPECIFIER_ID
))
1068 ud_child
->flags
|= UNIT_DIRECTORY_SPECIFIER_ID
;
1069 ud_child
->specifier_id
= ud
->specifier_id
;
1071 if ((ud
->flags
& UNIT_DIRECTORY_VERSION
) &&
1072 !(ud_child
->flags
& UNIT_DIRECTORY_VERSION
))
1074 ud_child
->flags
|= UNIT_DIRECTORY_VERSION
;
1075 ud_child
->version
= ud
->version
;
1078 /* register the child unit */
1079 ud_child
->flags
|= UNIT_DIRECTORY_LUN_DIRECTORY
;
1080 nodemgr_register_device(ne
, ud_child
, &ud
->device
);
1085 case CSR1212_KV_ID_DIRECTORY_ID
:
1086 ud
->directory_id
= kv
->value
.immediate
;
1092 last_key_id
= kv
->key
.id
;
1095 /* do not process child units here and only if not already registered */
1096 if (!parent
&& ud
->device
.bus
!= &ieee1394_bus_type
)
1097 nodemgr_register_device(ne
, ud
, &ne
->device
);
1101 unit_directory_error
:
1107 static void nodemgr_process_root_directory(struct node_entry
*ne
)
1109 unsigned int ud_id
= 0;
1110 struct csr1212_dentry
*dentry
;
1111 struct csr1212_keyval
*kv
, *vendor_name_kv
= NULL
;
1114 ne
->needs_probe
= false;
1116 csr1212_for_each_dir_entry(ne
->csr
, kv
, ne
->csr
->root_kv
, dentry
) {
1117 switch (kv
->key
.id
) {
1118 case CSR1212_KV_ID_VENDOR
:
1119 ne
->vendor_id
= kv
->value
.immediate
;
1122 case CSR1212_KV_ID_NODE_CAPABILITIES
:
1123 ne
->capabilities
= kv
->value
.immediate
;
1126 case CSR1212_KV_ID_UNIT
:
1127 nodemgr_process_unit_directory(ne
, kv
, &ud_id
, NULL
);
1130 case CSR1212_KV_ID_DESCRIPTOR
:
1131 if (last_key_id
== CSR1212_KV_ID_VENDOR
) {
1132 if (kv
->key
.type
== CSR1212_KV_TYPE_LEAF
&&
1133 CSR1212_DESCRIPTOR_LEAF_TYPE(kv
) == 0 &&
1134 CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv
) == 0 &&
1135 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv
) == 0 &&
1136 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv
) == 0 &&
1137 CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv
) == 0) {
1138 csr1212_keep_keyval(kv
);
1139 vendor_name_kv
= kv
;
1144 last_key_id
= kv
->key
.id
;
1147 if (ne
->vendor_name_kv
) {
1148 kv
= ne
->vendor_name_kv
;
1149 ne
->vendor_name_kv
= vendor_name_kv
;
1150 csr1212_release_keyval(kv
);
1151 } else if (vendor_name_kv
) {
1152 ne
->vendor_name_kv
= vendor_name_kv
;
1153 if (device_create_file(&ne
->device
,
1154 &dev_attr_ne_vendor_name_kv
) != 0)
1155 HPSB_ERR("Failed to add sysfs attribute");
1159 #ifdef CONFIG_HOTPLUG
1161 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1163 struct unit_directory
*ud
;
1165 /* ieee1394:venNmoNspNverN */
1166 char buf
[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
1171 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
1173 if (ud
->ne
->in_limbo
|| ud
->ignore_driver
)
1176 #define PUT_ENVP(fmt,val) \
1178 retval = add_uevent_var(env, fmt, val); \
1183 PUT_ENVP("VENDOR_ID=%06x", ud
->vendor_id
);
1184 PUT_ENVP("MODEL_ID=%06x", ud
->model_id
);
1185 PUT_ENVP("GUID=%016Lx", (unsigned long long)ud
->ne
->guid
);
1186 PUT_ENVP("SPECIFIER_ID=%06x", ud
->specifier_id
);
1187 PUT_ENVP("VERSION=%06x", ud
->version
);
1188 snprintf(buf
, sizeof(buf
), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
1193 PUT_ENVP("MODALIAS=%s", buf
);
1202 static int nodemgr_uevent(struct device
*dev
, struct kobj_uevent_env
*env
)
1207 #endif /* CONFIG_HOTPLUG */
1210 int __hpsb_register_protocol(struct hpsb_protocol_driver
*drv
,
1211 struct module
*owner
)
1215 drv
->driver
.bus
= &ieee1394_bus_type
;
1216 drv
->driver
.owner
= owner
;
1217 drv
->driver
.name
= drv
->name
;
1219 /* This will cause a probe for devices */
1220 error
= driver_register(&drv
->driver
);
1222 nodemgr_create_drv_files(drv
);
1226 void hpsb_unregister_protocol(struct hpsb_protocol_driver
*driver
)
1228 nodemgr_remove_drv_files(driver
);
1229 /* This will subsequently disconnect all devices that our driver
1230 * is attached to. */
1231 driver_unregister(&driver
->driver
);
1236 * This function updates nodes that were present on the bus before the
1237 * reset and still are after the reset. The nodeid and the config rom
1238 * may have changed, and the drivers managing this device must be
1239 * informed that this device just went through a bus reset, to allow
1240 * the to take whatever actions required.
1242 static void nodemgr_update_node(struct node_entry
*ne
, struct csr1212_csr
*csr
,
1243 nodeid_t nodeid
, unsigned int generation
)
1245 if (ne
->nodeid
!= nodeid
) {
1246 HPSB_DEBUG("Node changed: " NODE_BUS_FMT
" -> " NODE_BUS_FMT
,
1247 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1248 NODE_BUS_ARGS(ne
->host
, nodeid
));
1249 ne
->nodeid
= nodeid
;
1252 if (ne
->busopt
.generation
!= ((be32_to_cpu(csr
->bus_info_data
[2]) >> 4) & 0xf)) {
1253 kfree(ne
->csr
->private);
1254 csr1212_destroy_csr(ne
->csr
);
1257 /* If the node's configrom generation has changed, we
1258 * unregister all the unit directories. */
1259 nodemgr_remove_uds(ne
);
1261 nodemgr_update_bus_options(ne
);
1263 /* Mark the node as new, so it gets re-probed */
1264 ne
->needs_probe
= true;
1266 /* old cache is valid, so update its generation */
1267 struct nodemgr_csr_info
*ci
= ne
->csr
->private;
1268 ci
->generation
= generation
;
1269 /* free the partially filled now unneeded new cache */
1270 kfree(csr
->private);
1271 csr1212_destroy_csr(csr
);
1274 /* Mark the node current */
1275 ne
->generation
= generation
;
1278 device_remove_file(&ne
->device
, &dev_attr_ne_in_limbo
);
1279 ne
->in_limbo
= false;
1281 HPSB_DEBUG("Node reactivated: "
1282 "ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1283 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1284 (unsigned long long)ne
->guid
);
1288 static void nodemgr_node_scan_one(struct hpsb_host
*host
,
1289 nodeid_t nodeid
, int generation
)
1291 struct node_entry
*ne
;
1293 struct csr1212_csr
*csr
;
1294 struct nodemgr_csr_info
*ci
;
1297 ci
= kmalloc(sizeof(*ci
), GFP_KERNEL
);
1302 ci
->nodeid
= nodeid
;
1303 ci
->generation
= generation
;
1305 /* Prepare for speed probe which occurs when reading the ROM */
1306 speed
= &(host
->speed
[NODEID_TO_NODE(nodeid
)]);
1307 if (*speed
> host
->csr
.lnk_spd
)
1308 *speed
= host
->csr
.lnk_spd
;
1309 ci
->speed_unverified
= *speed
> IEEE1394_SPEED_100
;
1311 /* We need to detect when the ConfigROM's generation has changed,
1312 * so we only update the node's info when it needs to be. */
1314 csr
= csr1212_create_csr(&nodemgr_csr_ops
, 5 * sizeof(quadlet_t
), ci
);
1315 if (!csr
|| csr1212_parse_csr(csr
) != CSR1212_SUCCESS
) {
1316 HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT
,
1317 NODE_BUS_ARGS(host
, nodeid
));
1319 csr1212_destroy_csr(csr
);
1324 if (csr
->bus_info_data
[1] != IEEE1394_BUSID_MAGIC
) {
1325 /* This isn't a 1394 device, but we let it slide. There
1326 * was a report of a device with broken firmware which
1327 * reported '2394' instead of '1394', which is obviously a
1328 * mistake. One would hope that a non-1394 device never
1329 * gets connected to Firewire bus. If someone does, we
1330 * shouldn't be held responsible, so we'll allow it with a
1332 HPSB_WARN("Node " NODE_BUS_FMT
" has invalid busID magic [0x%08x]",
1333 NODE_BUS_ARGS(host
, nodeid
), csr
->bus_info_data
[1]);
1336 guid
= ((u64
)be32_to_cpu(csr
->bus_info_data
[3]) << 32) | be32_to_cpu(csr
->bus_info_data
[4]);
1337 ne
= find_entry_by_guid(guid
);
1339 if (ne
&& ne
->host
!= host
&& ne
->in_limbo
) {
1340 /* Must have moved this device from one host to another */
1341 nodemgr_remove_ne(ne
);
1346 nodemgr_create_node(guid
, csr
, host
, nodeid
, generation
);
1348 nodemgr_update_node(ne
, csr
, nodeid
, generation
);
1352 static void nodemgr_node_scan(struct hpsb_host
*host
, int generation
)
1355 struct selfid
*sid
= (struct selfid
*)host
->topology_map
;
1356 nodeid_t nodeid
= LOCAL_BUS
;
1358 /* Scan each node on the bus */
1359 for (count
= host
->selfid_count
; count
; count
--, sid
++) {
1363 if (!sid
->link_active
) {
1367 nodemgr_node_scan_one(host
, nodeid
++, generation
);
1371 static void nodemgr_pause_ne(struct node_entry
*ne
)
1373 HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT
"] GUID[%016Lx]",
1374 NODE_BUS_ARGS(ne
->host
, ne
->nodeid
),
1375 (unsigned long long)ne
->guid
);
1377 ne
->in_limbo
= true;
1378 WARN_ON(device_create_file(&ne
->device
, &dev_attr_ne_in_limbo
));
1381 static int update_pdrv(struct device
*dev
, void *data
)
1383 struct unit_directory
*ud
;
1384 struct device_driver
*drv
;
1385 struct hpsb_protocol_driver
*pdrv
;
1386 struct node_entry
*ne
= data
;
1389 ud
= container_of(dev
, struct unit_directory
, unit_dev
);
1391 drv
= get_driver(ud
->device
.driver
);
1394 pdrv
= container_of(drv
, struct hpsb_protocol_driver
,
1397 down(&ud
->device
.sem
);
1398 error
= pdrv
->update(ud
);
1399 up(&ud
->device
.sem
);
1402 device_release_driver(&ud
->device
);
1410 static void nodemgr_update_pdrv(struct node_entry
*ne
)
1412 class_for_each_device(&nodemgr_ud_class
, NULL
, ne
, update_pdrv
);
1415 /* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
1416 * seems like an optional service but in the end it is practically mandatory
1417 * as a consequence of these clauses.
1419 * Note that we cannot do a broadcast write to all nodes at once because some
1420 * pre-1394a devices would hang. */
1421 static void nodemgr_irm_write_bc(struct node_entry
*ne
, int generation
)
1423 const u64 bc_addr
= (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
);
1424 quadlet_t bc_remote
, bc_local
;
1427 if (!ne
->host
->is_irm
|| ne
->generation
!= generation
||
1428 ne
->nodeid
== ne
->host
->node_id
)
1431 bc_local
= cpu_to_be32(ne
->host
->csr
.broadcast_channel
);
1433 /* Check if the register is implemented and 1394a compliant. */
1434 error
= hpsb_read(ne
->host
, ne
->nodeid
, generation
, bc_addr
, &bc_remote
,
1436 if (!error
&& bc_remote
& cpu_to_be32(0x80000000) &&
1437 bc_remote
!= bc_local
)
1438 hpsb_node_write(ne
, bc_addr
, &bc_local
, sizeof(bc_local
));
1442 static void nodemgr_probe_ne(struct hpsb_host
*host
, struct node_entry
*ne
,
1447 if (ne
->host
!= host
|| ne
->in_limbo
)
1450 dev
= get_device(&ne
->device
);
1454 nodemgr_irm_write_bc(ne
, generation
);
1456 /* If "needs_probe", then this is either a new or changed node we
1457 * rescan totally. If the generation matches for an existing node
1458 * (one that existed prior to the bus reset) we send update calls
1459 * down to the drivers. Otherwise, this is a dead node and we
1461 if (ne
->needs_probe
)
1462 nodemgr_process_root_directory(ne
);
1463 else if (ne
->generation
== generation
)
1464 nodemgr_update_pdrv(ne
);
1466 nodemgr_pause_ne(ne
);
1471 struct node_probe_parameter
{
1472 struct hpsb_host
*host
;
1477 static int node_probe(struct device
*dev
, void *data
)
1479 struct node_probe_parameter
*p
= data
;
1480 struct node_entry
*ne
;
1482 if (p
->generation
!= get_hpsb_generation(p
->host
))
1485 ne
= container_of(dev
, struct node_entry
, node_dev
);
1486 if (ne
->needs_probe
== p
->probe_now
)
1487 nodemgr_probe_ne(p
->host
, ne
, p
->generation
);
1491 static int nodemgr_node_probe(struct hpsb_host
*host
, int generation
)
1493 struct node_probe_parameter p
;
1496 p
.generation
= generation
;
1498 * Do some processing of the nodes we've probed. This pulls them
1499 * into the sysfs layer if needed, and can result in processing of
1500 * unit-directories, or just updating the node and it's
1503 * Run updates before probes. Usually, updates are time-critical
1504 * while probes are time-consuming.
1506 * Meanwhile, another bus reset may have happened. In this case we
1507 * skip everything here and let the next bus scan handle it.
1508 * Otherwise we may prematurely remove nodes which are still there.
1510 p
.probe_now
= false;
1511 if (class_for_each_device(&nodemgr_ne_class
, NULL
, &p
, node_probe
) != 0)
1515 if (class_for_each_device(&nodemgr_ne_class
, NULL
, &p
, node_probe
) != 0)
1518 * Now let's tell the bus to rescan our devices. This may seem
1519 * like overhead, but the driver-model core will only scan a
1520 * device for a driver when either the device is added, or when a
1521 * new driver is added. A bus reset is a good reason to rescan
1522 * devices that were there before. For example, an sbp2 device
1523 * may become available for login, if the host that held it was
1526 if (bus_rescan_devices(&ieee1394_bus_type
) != 0)
1527 HPSB_DEBUG("bus_rescan_devices had an error");
1532 static int remove_nodes_in_limbo(struct device
*dev
, void *data
)
1534 struct node_entry
*ne
;
1536 if (dev
->bus
!= &ieee1394_bus_type
)
1539 ne
= container_of(dev
, struct node_entry
, device
);
1541 nodemgr_remove_ne(ne
);
1546 static void nodemgr_remove_nodes_in_limbo(struct hpsb_host
*host
)
1548 device_for_each_child(&host
->device
, NULL
, remove_nodes_in_limbo
);
1551 static int nodemgr_send_resume_packet(struct hpsb_host
*host
)
1553 struct hpsb_packet
*packet
;
1554 int error
= -ENOMEM
;
1556 packet
= hpsb_make_phypacket(host
,
1557 EXTPHYPACKET_TYPE_RESUME
|
1558 NODEID_TO_NODE(host
->node_id
) << PHYPACKET_PORT_SHIFT
);
1560 packet
->no_waiter
= 1;
1561 packet
->generation
= get_hpsb_generation(host
);
1562 error
= hpsb_send_packet(packet
);
1565 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1570 /* Perform a few high-level IRM responsibilities. */
1571 static int nodemgr_do_irm_duties(struct hpsb_host
*host
, int cycles
)
1575 /* if irm_id == -1 then there is no IRM on this bus */
1576 if (!host
->is_irm
|| host
->irm_id
== (nodeid_t
)-1)
1579 /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
1580 host
->csr
.broadcast_channel
|= 0x40000000;
1582 /* If there is no bus manager then we should set the root node's
1583 * force_root bit to promote bus stability per the 1394
1584 * spec. (8.4.2.6) */
1585 if (host
->busmgr_id
== 0xffff && host
->node_count
> 1)
1587 u16 root_node
= host
->node_count
- 1;
1589 /* get cycle master capability flag from root node */
1590 if (host
->is_cycmst
||
1591 (!hpsb_read(host
, LOCAL_BUS
| root_node
, get_hpsb_generation(host
),
1592 (CSR_REGISTER_BASE
+ CSR_CONFIG_ROM
+ 2 * sizeof(quadlet_t
)),
1593 &bc
, sizeof(quadlet_t
)) &&
1594 be32_to_cpu(bc
) & 1 << CSR_CMC_SHIFT
))
1595 hpsb_send_phy_config(host
, root_node
, -1);
1597 HPSB_DEBUG("The root node is not cycle master capable; "
1598 "selecting a new root node and resetting...");
1601 /* Oh screw it! Just leave the bus as it is */
1602 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1606 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1607 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1613 /* Some devices suspend their ports while being connected to an inactive
1614 * host adapter, i.e. if connected before the low-level driver is
1615 * loaded. They become visible either when physically unplugged and
1616 * replugged, or when receiving a resume packet. Send one once. */
1617 if (!host
->resume_packet_sent
&& !nodemgr_send_resume_packet(host
))
1618 host
->resume_packet_sent
= 1;
1623 /* We need to ensure that if we are not the IRM, that the IRM node is capable of
1624 * everything we can do, otherwise issue a bus reset and try to become the IRM
1626 static int nodemgr_check_irm_capability(struct hpsb_host
*host
, int cycles
)
1631 if (hpsb_disable_irm
|| host
->is_irm
)
1634 status
= hpsb_read(host
, LOCAL_BUS
| (host
->irm_id
),
1635 get_hpsb_generation(host
),
1636 (CSR_REGISTER_BASE
| CSR_BROADCAST_CHANNEL
),
1637 &bc
, sizeof(quadlet_t
));
1639 if (status
< 0 || !(be32_to_cpu(bc
) & 0x80000000)) {
1640 /* The current irm node does not have a valid BROADCAST_CHANNEL
1641 * register and we do, so reset the bus with force_root set */
1642 HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
1645 /* Oh screw it! Just leave the bus as it is */
1646 HPSB_DEBUG("Stopping reset loop for IRM sanity");
1650 hpsb_send_phy_config(host
, NODEID_TO_NODE(host
->node_id
), -1);
1651 hpsb_reset_bus(host
, LONG_RESET_FORCE_ROOT
);
1659 static int nodemgr_host_thread(void *data
)
1661 struct hpsb_host
*host
= data
;
1662 unsigned int g
, generation
= 0;
1663 int i
, reset_cycles
= 0;
1666 /* Setup our device-model entries */
1667 nodemgr_create_host_dev_files(host
);
1670 /* Sleep until next bus reset */
1671 set_current_state(TASK_INTERRUPTIBLE
);
1672 if (get_hpsb_generation(host
) == generation
&&
1673 !kthread_should_stop())
1675 __set_current_state(TASK_RUNNING
);
1677 /* Thread may have been woken up to freeze or to exit */
1678 if (try_to_freeze())
1680 if (kthread_should_stop())
1683 /* Pause for 1/4 second in 1/16 second intervals,
1684 * to make sure things settle down. */
1685 g
= get_hpsb_generation(host
);
1686 for (i
= 0; i
< 4 ; i
++) {
1687 msleep_interruptible(63);
1688 if (kthread_should_stop())
1691 /* Now get the generation in which the node ID's we collect
1692 * are valid. During the bus scan we will use this generation
1693 * for the read transactions, so that if another reset occurs
1694 * during the scan the transactions will fail instead of
1695 * returning bogus data. */
1696 generation
= get_hpsb_generation(host
);
1698 /* If we get a reset before we are done waiting, then
1699 * start the waiting over again */
1700 if (generation
!= g
)
1701 g
= generation
, i
= 0;
1704 if (!nodemgr_check_irm_capability(host
, reset_cycles
) ||
1705 !nodemgr_do_irm_duties(host
, reset_cycles
)) {
1711 /* Scan our nodes to get the bus options and create node
1712 * entries. This does not do the sysfs stuff, since that
1713 * would trigger uevents and such, which is a bad idea at
1715 nodemgr_node_scan(host
, generation
);
1717 /* This actually does the full probe, with sysfs
1719 if (!nodemgr_node_probe(host
, generation
))
1722 /* Update some of our sysfs symlinks */
1723 nodemgr_update_host_dev_links(host
);
1725 /* Sleep 3 seconds */
1726 for (i
= 3000/200; i
; i
--) {
1727 msleep_interruptible(200);
1728 if (kthread_should_stop())
1731 if (generation
!= get_hpsb_generation(host
))
1734 /* Remove nodes which are gone, unless a bus reset happened */
1736 nodemgr_remove_nodes_in_limbo(host
);
1739 HPSB_VERBOSE("NodeMgr: Exiting thread");
1743 struct per_host_parameter
{
1745 int (*cb
)(struct hpsb_host
*, void *);
1748 static int per_host(struct device
*dev
, void *data
)
1750 struct hpsb_host
*host
;
1751 struct per_host_parameter
*p
= data
;
1753 host
= container_of(dev
, struct hpsb_host
, host_dev
);
1754 return p
->cb(host
, p
->data
);
1758 * nodemgr_for_each_host - call a function for each IEEE 1394 host
1759 * @data: an address to supply to the callback
1760 * @cb: function to call for each host
1762 * Iterate the hosts, calling a given function with supplied data for each host.
1763 * If the callback fails on a host, i.e. if it returns a non-zero value, the
1764 * iteration is stopped.
1766 * Return value: 0 on success, non-zero on failure (same as returned by last run
1769 int nodemgr_for_each_host(void *data
, int (*cb
)(struct hpsb_host
*, void *))
1771 struct per_host_parameter p
;
1775 return class_for_each_device(&hpsb_host_class
, NULL
, &p
, per_host
);
1778 /* The following two convenience functions use a struct node_entry
1779 * for addressing a node on the bus. They are intended for use by any
1780 * process context, not just the nodemgr thread, so we need to be a
1781 * little careful when reading out the node ID and generation. The
1782 * thing that can go wrong is that we get the node ID, then a bus
1783 * reset occurs, and then we read the generation. The node ID is
1784 * possibly invalid, but the generation is current, and we end up
1785 * sending a packet to a the wrong node.
1787 * The solution is to make sure we read the generation first, so that
1788 * if a reset occurs in the process, we end up with a stale generation
1789 * and the transactions will fail instead of silently using wrong node
1794 * hpsb_node_fill_packet - fill some destination information into a packet
1795 * @ne: destination node
1796 * @packet: packet to fill in
1798 * This will fill in the given, pre-initialised hpsb_packet with the current
1799 * information from the node entry (host, node ID, bus generation number).
1801 void hpsb_node_fill_packet(struct node_entry
*ne
, struct hpsb_packet
*packet
)
1803 packet
->host
= ne
->host
;
1804 packet
->generation
= ne
->generation
;
1806 packet
->node_id
= ne
->nodeid
;
1809 int hpsb_node_write(struct node_entry
*ne
, u64 addr
,
1810 quadlet_t
*buffer
, size_t length
)
1812 unsigned int generation
= ne
->generation
;
1815 return hpsb_write(ne
->host
, ne
->nodeid
, generation
,
1816 addr
, buffer
, length
);
1819 static void nodemgr_add_host(struct hpsb_host
*host
)
1821 struct host_info
*hi
;
1823 hi
= hpsb_create_hostinfo(&nodemgr_highlevel
, host
, sizeof(*hi
));
1825 HPSB_ERR("NodeMgr: out of memory in add host");
1829 hi
->thread
= kthread_run(nodemgr_host_thread
, host
, "knodemgrd_%d",
1831 if (IS_ERR(hi
->thread
)) {
1832 HPSB_ERR("NodeMgr: cannot start thread for host %d", host
->id
);
1833 hpsb_destroy_hostinfo(&nodemgr_highlevel
, host
);
1837 static void nodemgr_host_reset(struct hpsb_host
*host
)
1839 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1842 HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host
->id
);
1843 wake_up_process(hi
->thread
);
1847 static void nodemgr_remove_host(struct hpsb_host
*host
)
1849 struct host_info
*hi
= hpsb_get_hostinfo(&nodemgr_highlevel
, host
);
1852 kthread_stop(hi
->thread
);
1853 nodemgr_remove_host_dev(&host
->device
);
1857 static struct hpsb_highlevel nodemgr_highlevel
= {
1858 .name
= "Node manager",
1859 .add_host
= nodemgr_add_host
,
1860 .host_reset
= nodemgr_host_reset
,
1861 .remove_host
= nodemgr_remove_host
,
1864 int init_ieee1394_nodemgr(void)
1868 error
= class_register(&nodemgr_ne_class
);
1871 error
= class_register(&nodemgr_ud_class
);
1874 error
= driver_register(&nodemgr_mid_layer_driver
);
1877 /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
1878 nodemgr_dev_template_host
.driver
= &nodemgr_mid_layer_driver
;
1880 hpsb_register_highlevel(&nodemgr_highlevel
);
1884 class_unregister(&nodemgr_ud_class
);
1886 class_unregister(&nodemgr_ne_class
);
1891 void cleanup_ieee1394_nodemgr(void)
1893 hpsb_unregister_highlevel(&nodemgr_highlevel
);
1894 driver_unregister(&nodemgr_mid_layer_driver
);
1895 class_unregister(&nodemgr_ud_class
);
1896 class_unregister(&nodemgr_ne_class
);