Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * Incremental bus scan, based on bus topology | |
3038e353 KH |
3 | * |
4 | * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
19 | */ | |
20 | ||
e8ca9702 | 21 | #include <linux/bug.h> |
3038e353 | 22 | #include <linux/errno.h> |
e8ca9702 SR |
23 | #include <linux/jiffies.h> |
24 | #include <linux/kernel.h> | |
25 | #include <linux/list.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/string.h> | |
30 | ||
31 | #include <asm/atomic.h> | |
b5d2a5e0 | 32 | #include <asm/system.h> |
e8ca9702 | 33 | |
3038e353 | 34 | #include "fw-topology.h" |
e8ca9702 | 35 | #include "fw-transaction.h" |
3038e353 | 36 | |
a77754a7 KH |
37 | #define SELF_ID_PHY_ID(q) (((q) >> 24) & 0x3f) |
38 | #define SELF_ID_EXTENDED(q) (((q) >> 23) & 0x01) | |
39 | #define SELF_ID_LINK_ON(q) (((q) >> 22) & 0x01) | |
40 | #define SELF_ID_GAP_COUNT(q) (((q) >> 16) & 0x3f) | |
41 | #define SELF_ID_PHY_SPEED(q) (((q) >> 14) & 0x03) | |
42 | #define SELF_ID_CONTENDER(q) (((q) >> 11) & 0x01) | |
43 | #define SELF_ID_PHY_INITIATOR(q) (((q) >> 1) & 0x01) | |
44 | #define SELF_ID_MORE_PACKETS(q) (((q) >> 0) & 0x01) | |
3038e353 | 45 | |
a77754a7 | 46 | #define SELF_ID_EXT_SEQUENCE(q) (((q) >> 20) & 0x07) |
3038e353 KH |
47 | |
48 | static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count) | |
49 | { | |
50 | u32 q; | |
51 | int port_type, shift, seq; | |
52 | ||
53 | *total_port_count = 0; | |
54 | *child_port_count = 0; | |
55 | ||
56 | shift = 6; | |
57 | q = *sid; | |
58 | seq = 0; | |
59 | ||
60 | while (1) { | |
61 | port_type = (q >> shift) & 0x03; | |
62 | switch (port_type) { | |
63 | case SELFID_PORT_CHILD: | |
64 | (*child_port_count)++; | |
65 | case SELFID_PORT_PARENT: | |
66 | case SELFID_PORT_NCONN: | |
67 | (*total_port_count)++; | |
68 | case SELFID_PORT_NONE: | |
69 | break; | |
70 | } | |
71 | ||
72 | shift -= 2; | |
73 | if (shift == 0) { | |
a77754a7 | 74 | if (!SELF_ID_MORE_PACKETS(q)) |
3038e353 KH |
75 | return sid + 1; |
76 | ||
77 | shift = 16; | |
78 | sid++; | |
79 | q = *sid; | |
80 | ||
c781c06d KH |
81 | /* |
82 | * Check that the extra packets actually are | |
3038e353 KH |
83 | * extended self ID packets and that the |
84 | * sequence numbers in the extended self ID | |
c781c06d KH |
85 | * packets increase as expected. |
86 | */ | |
3038e353 | 87 | |
a77754a7 KH |
88 | if (!SELF_ID_EXTENDED(q) || |
89 | seq != SELF_ID_EXT_SEQUENCE(q)) | |
3038e353 KH |
90 | return NULL; |
91 | ||
92 | seq++; | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | static int get_port_type(u32 *sid, int port_index) | |
98 | { | |
99 | int index, shift; | |
100 | ||
101 | index = (port_index + 5) / 8; | |
102 | shift = 16 - ((port_index + 5) & 7) * 2; | |
103 | return (sid[index] >> shift) & 0x03; | |
104 | } | |
105 | ||
95688e97 | 106 | static struct fw_node *fw_node_create(u32 sid, int port_count, int color) |
3038e353 KH |
107 | { |
108 | struct fw_node *node; | |
109 | ||
2d826cc5 | 110 | node = kzalloc(sizeof(*node) + port_count * sizeof(node->ports[0]), |
3038e353 KH |
111 | GFP_ATOMIC); |
112 | if (node == NULL) | |
113 | return NULL; | |
114 | ||
115 | node->color = color; | |
a77754a7 KH |
116 | node->node_id = LOCAL_BUS | SELF_ID_PHY_ID(sid); |
117 | node->link_on = SELF_ID_LINK_ON(sid); | |
118 | node->phy_speed = SELF_ID_PHY_SPEED(sid); | |
c9755e14 | 119 | node->initiated_reset = SELF_ID_PHY_INITIATOR(sid); |
3038e353 KH |
120 | node->port_count = port_count; |
121 | ||
122 | atomic_set(&node->ref_count, 1); | |
123 | INIT_LIST_HEAD(&node->link); | |
124 | ||
125 | return node; | |
126 | } | |
127 | ||
c781c06d KH |
128 | /* |
129 | * Compute the maximum hop count for this node and it's children. The | |
83db801c KH |
130 | * maximum hop count is the maximum number of connections between any |
131 | * two nodes in the subtree rooted at this node. We need this for | |
132 | * setting the gap count. As we build the tree bottom up in | |
133 | * build_tree() below, this is fairly easy to do: for each node we | |
134 | * maintain the max hop count and the max depth, ie the number of hops | |
135 | * to the furthest leaf. Computing the max hop count breaks down into | |
136 | * two cases: either the path goes through this node, in which case | |
137 | * the hop count is the sum of the two biggest child depths plus 2. | |
138 | * Or it could be the case that the max hop path is entirely | |
139 | * containted in a child tree, in which case the max hop count is just | |
140 | * the max hop count of this child. | |
141 | */ | |
142 | static void update_hop_count(struct fw_node *node) | |
143 | { | |
144 | int depths[2] = { -1, -1 }; | |
145 | int max_child_hops = 0; | |
146 | int i; | |
147 | ||
148 | for (i = 0; i < node->port_count; i++) { | |
dae1a3aa | 149 | if (node->ports[i] == NULL) |
83db801c KH |
150 | continue; |
151 | ||
dae1a3aa SR |
152 | if (node->ports[i]->max_hops > max_child_hops) |
153 | max_child_hops = node->ports[i]->max_hops; | |
83db801c | 154 | |
dae1a3aa | 155 | if (node->ports[i]->max_depth > depths[0]) { |
83db801c | 156 | depths[1] = depths[0]; |
dae1a3aa SR |
157 | depths[0] = node->ports[i]->max_depth; |
158 | } else if (node->ports[i]->max_depth > depths[1]) | |
159 | depths[1] = node->ports[i]->max_depth; | |
83db801c KH |
160 | } |
161 | ||
162 | node->max_depth = depths[0] + 1; | |
163 | node->max_hops = max(max_child_hops, depths[0] + depths[1] + 2); | |
164 | } | |
165 | ||
e5f84f82 SR |
166 | static inline struct fw_node *fw_node(struct list_head *l) |
167 | { | |
168 | return list_entry(l, struct fw_node, link); | |
169 | } | |
83db801c | 170 | |
3038e353 KH |
171 | /** |
172 | * build_tree - Build the tree representation of the topology | |
173 | * @self_ids: array of self IDs to create the tree from | |
174 | * @self_id_count: the length of the self_ids array | |
175 | * @local_id: the node ID of the local node | |
176 | * | |
177 | * This function builds the tree representation of the topology given | |
178 | * by the self IDs from the latest bus reset. During the construction | |
179 | * of the tree, the function checks that the self IDs are valid and | |
c1b91ce4 | 180 | * internally consistent. On succcess this function returns the |
3038e353 KH |
181 | * fw_node corresponding to the local card otherwise NULL. |
182 | */ | |
473d28c7 KH |
183 | static struct fw_node *build_tree(struct fw_card *card, |
184 | u32 *sid, int self_id_count) | |
3038e353 | 185 | { |
93e4fd45 | 186 | struct fw_node *node, *child, *local_node, *irm_node; |
3038e353 | 187 | struct list_head stack, *h; |
473d28c7 | 188 | u32 *next_sid, *end, q; |
3038e353 | 189 | int i, port_count, child_port_count, phy_id, parent_count, stack_depth; |
24d40125 SR |
190 | int gap_count; |
191 | bool beta_repeaters_present; | |
3038e353 KH |
192 | |
193 | local_node = NULL; | |
194 | node = NULL; | |
195 | INIT_LIST_HEAD(&stack); | |
196 | stack_depth = 0; | |
473d28c7 | 197 | end = sid + self_id_count; |
3038e353 | 198 | phy_id = 0; |
93e4fd45 | 199 | irm_node = NULL; |
a77754a7 | 200 | gap_count = SELF_ID_GAP_COUNT(*sid); |
24d40125 | 201 | beta_repeaters_present = false; |
3038e353 KH |
202 | |
203 | while (sid < end) { | |
204 | next_sid = count_ports(sid, &port_count, &child_port_count); | |
205 | ||
206 | if (next_sid == NULL) { | |
207 | fw_error("Inconsistent extended self IDs.\n"); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | q = *sid; | |
a77754a7 | 212 | if (phy_id != SELF_ID_PHY_ID(q)) { |
3038e353 | 213 | fw_error("PHY ID mismatch in self ID: %d != %d.\n", |
a77754a7 | 214 | phy_id, SELF_ID_PHY_ID(q)); |
3038e353 KH |
215 | return NULL; |
216 | } | |
217 | ||
218 | if (child_port_count > stack_depth) { | |
219 | fw_error("Topology stack underflow\n"); | |
220 | return NULL; | |
221 | } | |
222 | ||
c781c06d KH |
223 | /* |
224 | * Seek back from the top of our stack to find the | |
225 | * start of the child nodes for this node. | |
226 | */ | |
3038e353 KH |
227 | for (i = 0, h = &stack; i < child_port_count; i++) |
228 | h = h->prev; | |
c1b91ce4 YD |
229 | /* |
230 | * When the stack is empty, this yields an invalid value, | |
231 | * but that pointer will never be dereferenced. | |
232 | */ | |
3038e353 KH |
233 | child = fw_node(h); |
234 | ||
235 | node = fw_node_create(q, port_count, card->color); | |
236 | if (node == NULL) { | |
8a8cea27 | 237 | fw_error("Out of memory while building topology.\n"); |
3038e353 KH |
238 | return NULL; |
239 | } | |
240 | ||
241 | if (phy_id == (card->node_id & 0x3f)) | |
242 | local_node = node; | |
243 | ||
a77754a7 | 244 | if (SELF_ID_CONTENDER(q)) |
93e4fd45 | 245 | irm_node = node; |
3038e353 KH |
246 | |
247 | parent_count = 0; | |
248 | ||
249 | for (i = 0; i < port_count; i++) { | |
250 | switch (get_port_type(sid, i)) { | |
251 | case SELFID_PORT_PARENT: | |
c781c06d KH |
252 | /* |
253 | * Who's your daddy? We dont know the | |
3038e353 KH |
254 | * parent node at this time, so we |
255 | * temporarily abuse node->color for | |
256 | * remembering the entry in the | |
257 | * node->ports array where the parent | |
258 | * node should be. Later, when we | |
259 | * handle the parent node, we fix up | |
260 | * the reference. | |
261 | */ | |
262 | parent_count++; | |
263 | node->color = i; | |
264 | break; | |
265 | ||
266 | case SELFID_PORT_CHILD: | |
dae1a3aa | 267 | node->ports[i] = child; |
c781c06d KH |
268 | /* |
269 | * Fix up parent reference for this | |
270 | * child node. | |
271 | */ | |
dae1a3aa | 272 | child->ports[child->color] = node; |
3038e353 KH |
273 | child->color = card->color; |
274 | child = fw_node(child->link.next); | |
275 | break; | |
276 | } | |
277 | } | |
278 | ||
c781c06d KH |
279 | /* |
280 | * Check that the node reports exactly one parent | |
3038e353 | 281 | * port, except for the root, which of course should |
c781c06d KH |
282 | * have no parents. |
283 | */ | |
3038e353 KH |
284 | if ((next_sid == end && parent_count != 0) || |
285 | (next_sid < end && parent_count != 1)) { | |
286 | fw_error("Parent port inconsistency for node %d: " | |
287 | "parent_count=%d\n", phy_id, parent_count); | |
288 | return NULL; | |
289 | } | |
290 | ||
291 | /* Pop the child nodes off the stack and push the new node. */ | |
292 | __list_del(h->prev, &stack); | |
293 | list_add_tail(&node->link, &stack); | |
294 | stack_depth += 1 - child_port_count; | |
295 | ||
24d40125 SR |
296 | if (node->phy_speed == SCODE_BETA && |
297 | parent_count + child_port_count > 1) | |
298 | beta_repeaters_present = true; | |
299 | ||
c781c06d | 300 | /* |
25b1c3d8 SR |
301 | * If PHYs report different gap counts, set an invalid count |
302 | * which will force a gap count reconfiguration and a reset. | |
c781c06d | 303 | */ |
a77754a7 | 304 | if (SELF_ID_GAP_COUNT(q) != gap_count) |
25b1c3d8 | 305 | gap_count = 0; |
83db801c KH |
306 | |
307 | update_hop_count(node); | |
308 | ||
3038e353 KH |
309 | sid = next_sid; |
310 | phy_id++; | |
311 | } | |
312 | ||
313 | card->root_node = node; | |
93e4fd45 | 314 | card->irm_node = irm_node; |
83db801c | 315 | card->gap_count = gap_count; |
24d40125 | 316 | card->beta_repeaters_present = beta_repeaters_present; |
3038e353 KH |
317 | |
318 | return local_node; | |
319 | } | |
320 | ||
a98e2719 KH |
321 | typedef void (*fw_node_callback_t)(struct fw_card * card, |
322 | struct fw_node * node, | |
323 | struct fw_node * parent); | |
3038e353 | 324 | |
53dca511 SR |
325 | static void for_each_fw_node(struct fw_card *card, struct fw_node *root, |
326 | fw_node_callback_t callback) | |
3038e353 KH |
327 | { |
328 | struct list_head list; | |
329 | struct fw_node *node, *next, *child, *parent; | |
330 | int i; | |
331 | ||
332 | INIT_LIST_HEAD(&list); | |
333 | ||
334 | fw_node_get(root); | |
335 | list_add_tail(&root->link, &list); | |
336 | parent = NULL; | |
337 | list_for_each_entry(node, &list, link) { | |
338 | node->color = card->color; | |
339 | ||
340 | for (i = 0; i < node->port_count; i++) { | |
dae1a3aa | 341 | child = node->ports[i]; |
3038e353 KH |
342 | if (!child) |
343 | continue; | |
344 | if (child->color == card->color) | |
345 | parent = child; | |
346 | else { | |
347 | fw_node_get(child); | |
348 | list_add_tail(&child->link, &list); | |
349 | } | |
350 | } | |
351 | ||
352 | callback(card, node, parent); | |
353 | } | |
354 | ||
355 | list_for_each_entry_safe(node, next, &list, link) | |
356 | fw_node_put(node); | |
357 | } | |
358 | ||
53dca511 SR |
359 | static void report_lost_node(struct fw_card *card, |
360 | struct fw_node *node, struct fw_node *parent) | |
3038e353 KH |
361 | { |
362 | fw_node_event(card, node, FW_NODE_DESTROYED); | |
363 | fw_node_put(node); | |
d6f95a3d SR |
364 | |
365 | /* Topology has changed - reset bus manager retry counter */ | |
366 | card->bm_retries = 0; | |
3038e353 KH |
367 | } |
368 | ||
53dca511 SR |
369 | static void report_found_node(struct fw_card *card, |
370 | struct fw_node *node, struct fw_node *parent) | |
3038e353 KH |
371 | { |
372 | int b_path = (node->phy_speed == SCODE_BETA); | |
373 | ||
374 | if (parent != NULL) { | |
748086eb SR |
375 | /* min() macro doesn't work here with gcc 3.4 */ |
376 | node->max_speed = parent->max_speed < node->phy_speed ? | |
377 | parent->max_speed : node->phy_speed; | |
3038e353 KH |
378 | node->b_path = parent->b_path && b_path; |
379 | } else { | |
380 | node->max_speed = node->phy_speed; | |
381 | node->b_path = b_path; | |
382 | } | |
383 | ||
384 | fw_node_event(card, node, FW_NODE_CREATED); | |
d6f95a3d SR |
385 | |
386 | /* Topology has changed - reset bus manager retry counter */ | |
387 | card->bm_retries = 0; | |
3038e353 KH |
388 | } |
389 | ||
390 | void fw_destroy_nodes(struct fw_card *card) | |
391 | { | |
392 | unsigned long flags; | |
393 | ||
394 | spin_lock_irqsave(&card->lock, flags); | |
395 | card->color++; | |
396 | if (card->local_node != NULL) | |
397 | for_each_fw_node(card, card->local_node, report_lost_node); | |
15803478 | 398 | card->local_node = NULL; |
3038e353 KH |
399 | spin_unlock_irqrestore(&card->lock, flags); |
400 | } | |
401 | ||
402 | static void move_tree(struct fw_node *node0, struct fw_node *node1, int port) | |
403 | { | |
404 | struct fw_node *tree; | |
405 | int i; | |
406 | ||
dae1a3aa SR |
407 | tree = node1->ports[port]; |
408 | node0->ports[port] = tree; | |
3038e353 | 409 | for (i = 0; i < tree->port_count; i++) { |
dae1a3aa SR |
410 | if (tree->ports[i] == node1) { |
411 | tree->ports[i] = node0; | |
3038e353 KH |
412 | break; |
413 | } | |
414 | } | |
415 | } | |
416 | ||
417 | /** | |
418 | * update_tree - compare the old topology tree for card with the new | |
419 | * one specified by root. Queue the nodes and mark them as either | |
420 | * found, lost or updated. Update the nodes in the card topology tree | |
421 | * as we go. | |
422 | */ | |
53dca511 | 423 | static void update_tree(struct fw_card *card, struct fw_node *root) |
3038e353 KH |
424 | { |
425 | struct list_head list0, list1; | |
77e55719 | 426 | struct fw_node *node0, *node1, *next1; |
3038e353 KH |
427 | int i, event; |
428 | ||
429 | INIT_LIST_HEAD(&list0); | |
430 | list_add_tail(&card->local_node->link, &list0); | |
431 | INIT_LIST_HEAD(&list1); | |
432 | list_add_tail(&root->link, &list1); | |
433 | ||
434 | node0 = fw_node(list0.next); | |
435 | node1 = fw_node(list1.next); | |
3038e353 KH |
436 | |
437 | while (&node0->link != &list0) { | |
a2cdebe3 | 438 | WARN_ON(node0->port_count != node1->port_count); |
3038e353 | 439 | |
3038e353 KH |
440 | if (node0->link_on && !node1->link_on) |
441 | event = FW_NODE_LINK_OFF; | |
442 | else if (!node0->link_on && node1->link_on) | |
443 | event = FW_NODE_LINK_ON; | |
c9755e14 SR |
444 | else if (node1->initiated_reset && node1->link_on) |
445 | event = FW_NODE_INITIATED_RESET; | |
3038e353 KH |
446 | else |
447 | event = FW_NODE_UPDATED; | |
448 | ||
449 | node0->node_id = node1->node_id; | |
450 | node0->color = card->color; | |
451 | node0->link_on = node1->link_on; | |
452 | node0->initiated_reset = node1->initiated_reset; | |
83db801c | 453 | node0->max_hops = node1->max_hops; |
3038e353 KH |
454 | node1->color = card->color; |
455 | fw_node_event(card, node0, event); | |
456 | ||
457 | if (card->root_node == node1) | |
458 | card->root_node = node0; | |
459 | if (card->irm_node == node1) | |
460 | card->irm_node = node0; | |
461 | ||
462 | for (i = 0; i < node0->port_count; i++) { | |
dae1a3aa | 463 | if (node0->ports[i] && node1->ports[i]) { |
c781c06d KH |
464 | /* |
465 | * This port didn't change, queue the | |
3038e353 | 466 | * connected node for further |
c781c06d KH |
467 | * investigation. |
468 | */ | |
dae1a3aa | 469 | if (node0->ports[i]->color == card->color) |
3038e353 | 470 | continue; |
dae1a3aa SR |
471 | list_add_tail(&node0->ports[i]->link, &list0); |
472 | list_add_tail(&node1->ports[i]->link, &list1); | |
473 | } else if (node0->ports[i]) { | |
c781c06d KH |
474 | /* |
475 | * The nodes connected here were | |
3038e353 KH |
476 | * unplugged; unref the lost nodes and |
477 | * queue FW_NODE_LOST callbacks for | |
c781c06d KH |
478 | * them. |
479 | */ | |
3038e353 | 480 | |
dae1a3aa | 481 | for_each_fw_node(card, node0->ports[i], |
3038e353 | 482 | report_lost_node); |
dae1a3aa SR |
483 | node0->ports[i] = NULL; |
484 | } else if (node1->ports[i]) { | |
c781c06d KH |
485 | /* |
486 | * One or more node were connected to | |
3038e353 KH |
487 | * this port. Move the new nodes into |
488 | * the tree and queue FW_NODE_CREATED | |
c781c06d KH |
489 | * callbacks for them. |
490 | */ | |
3038e353 | 491 | move_tree(node0, node1, i); |
dae1a3aa | 492 | for_each_fw_node(card, node0->ports[i], |
3038e353 | 493 | report_found_node); |
3038e353 KH |
494 | } |
495 | } | |
496 | ||
497 | node0 = fw_node(node0->link.next); | |
77e55719 JF |
498 | next1 = fw_node(node1->link.next); |
499 | fw_node_put(node1); | |
500 | node1 = next1; | |
3038e353 KH |
501 | } |
502 | } | |
503 | ||
53dca511 SR |
504 | static void update_topology_map(struct fw_card *card, |
505 | u32 *self_ids, int self_id_count) | |
473d28c7 KH |
506 | { |
507 | int node_count; | |
473d28c7 KH |
508 | |
509 | card->topology_map[1]++; | |
510 | node_count = (card->root_node->node_id & 0x3f) + 1; | |
511 | card->topology_map[2] = (node_count << 16) | self_id_count; | |
e175569c | 512 | card->topology_map[0] = (self_id_count + 2) << 16; |
473d28c7 | 513 | memcpy(&card->topology_map[3], self_ids, self_id_count * 4); |
e175569c | 514 | fw_compute_block_crc(card->topology_map); |
473d28c7 KH |
515 | } |
516 | ||
53dca511 SR |
517 | void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation, |
518 | int self_id_count, u32 *self_ids) | |
3038e353 KH |
519 | { |
520 | struct fw_node *local_node; | |
521 | unsigned long flags; | |
3038e353 | 522 | |
a5c7f471 SR |
523 | /* |
524 | * If the selfID buffer is not the immediate successor of the | |
525 | * previously processed one, we cannot reliably compare the | |
526 | * old and new topologies. | |
527 | */ | |
8cd0bbbd | 528 | if (!is_next_generation(generation, card->generation) && |
a5c7f471 SR |
529 | card->local_node != NULL) { |
530 | fw_notify("skipped bus generations, destroying all nodes\n"); | |
531 | fw_destroy_nodes(card); | |
532 | card->bm_retries = 0; | |
533 | } | |
534 | ||
3038e353 KH |
535 | spin_lock_irqsave(&card->lock, flags); |
536 | ||
7889b60e | 537 | card->broadcast_channel_allocated = false; |
3038e353 | 538 | card->node_id = node_id; |
b5d2a5e0 SR |
539 | /* |
540 | * Update node_id before generation to prevent anybody from using | |
541 | * a stale node_id together with a current generation. | |
542 | */ | |
543 | smp_wmb(); | |
3038e353 | 544 | card->generation = generation; |
931c4834 | 545 | card->reset_jiffies = jiffies; |
0fa1986f | 546 | fw_schedule_bm_work(card, 0); |
3038e353 | 547 | |
473d28c7 KH |
548 | local_node = build_tree(card, self_ids, self_id_count); |
549 | ||
550 | update_topology_map(card, self_ids, self_id_count); | |
3038e353 KH |
551 | |
552 | card->color++; | |
553 | ||
554 | if (local_node == NULL) { | |
555 | fw_error("topology build failed\n"); | |
556 | /* FIXME: We need to issue a bus reset in this case. */ | |
557 | } else if (card->local_node == NULL) { | |
558 | card->local_node = local_node; | |
559 | for_each_fw_node(card, local_node, report_found_node); | |
560 | } else { | |
83db801c | 561 | update_tree(card, local_node); |
3038e353 KH |
562 | } |
563 | ||
564 | spin_unlock_irqrestore(&card->lock, flags); | |
565 | } | |
3038e353 | 566 | EXPORT_SYMBOL(fw_core_handle_bus_reset); |