Commit | Line | Data |
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c781c06d KH |
1 | /* |
2 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> | |
3038e353 KH |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/device.h> | |
6a5033be | 22 | #include <linux/mutex.h> |
e175569c | 23 | #include <linux/crc-itu-t.h> |
3038e353 KH |
24 | #include "fw-transaction.h" |
25 | #include "fw-topology.h" | |
19a15b93 | 26 | #include "fw-device.h" |
3038e353 | 27 | |
e175569c | 28 | int fw_compute_block_crc(u32 *block) |
3038e353 | 29 | { |
e175569c KH |
30 | __be32 be32_block[256]; |
31 | int i, length; | |
32 | ||
33 | length = (*block >> 16) & 0xff; | |
34 | for (i = 0; i < length; i++) | |
35 | be32_block[i] = cpu_to_be32(block[i + 1]); | |
36 | *block |= crc_itu_t(0, (u8 *) be32_block, length * 4); | |
3038e353 | 37 | |
e175569c | 38 | return length; |
3038e353 KH |
39 | } |
40 | ||
6a5033be | 41 | static DEFINE_MUTEX(card_mutex); |
3038e353 KH |
42 | static LIST_HEAD(card_list); |
43 | ||
44 | static LIST_HEAD(descriptor_list); | |
45 | static int descriptor_count; | |
46 | ||
a77754a7 KH |
47 | #define BIB_CRC(v) ((v) << 0) |
48 | #define BIB_CRC_LENGTH(v) ((v) << 16) | |
49 | #define BIB_INFO_LENGTH(v) ((v) << 24) | |
50 | ||
51 | #define BIB_LINK_SPEED(v) ((v) << 0) | |
52 | #define BIB_GENERATION(v) ((v) << 4) | |
53 | #define BIB_MAX_ROM(v) ((v) << 8) | |
54 | #define BIB_MAX_RECEIVE(v) ((v) << 12) | |
55 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) | |
56 | #define BIB_PMC ((1) << 27) | |
57 | #define BIB_BMC ((1) << 28) | |
58 | #define BIB_ISC ((1) << 29) | |
59 | #define BIB_CMC ((1) << 30) | |
60 | #define BIB_IMC ((1) << 31) | |
3038e353 KH |
61 | |
62 | static u32 * | |
a98e2719 | 63 | generate_config_rom(struct fw_card *card, size_t *config_rom_length) |
3038e353 KH |
64 | { |
65 | struct fw_descriptor *desc; | |
66 | static u32 config_rom[256]; | |
67 | int i, j, length; | |
68 | ||
c781c06d KH |
69 | /* |
70 | * Initialize contents of config rom buffer. On the OHCI | |
5e20c282 SR |
71 | * controller, block reads to the config rom accesses the host |
72 | * memory, but quadlet read access the hardware bus info block | |
73 | * registers. That's just crack, but it means we should make | |
74 | * sure the contents of bus info block in host memory mathces | |
c781c06d KH |
75 | * the version stored in the OHCI registers. |
76 | */ | |
3038e353 | 77 | |
2d826cc5 | 78 | memset(config_rom, 0, sizeof(config_rom)); |
a77754a7 | 79 | config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0); |
3038e353 KH |
80 | config_rom[1] = 0x31333934; |
81 | ||
82 | config_rom[2] = | |
a77754a7 KH |
83 | BIB_LINK_SPEED(card->link_speed) | |
84 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | | |
85 | BIB_MAX_ROM(2) | | |
86 | BIB_MAX_RECEIVE(card->max_receive) | | |
87 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC; | |
3038e353 KH |
88 | config_rom[3] = card->guid >> 32; |
89 | config_rom[4] = card->guid; | |
90 | ||
91 | /* Generate root directory. */ | |
92 | i = 5; | |
93 | config_rom[i++] = 0; | |
94 | config_rom[i++] = 0x0c0083c0; /* node capabilities */ | |
3038e353 KH |
95 | j = i + descriptor_count; |
96 | ||
97 | /* Generate root directory entries for descriptors. */ | |
98 | list_for_each_entry (desc, &descriptor_list, link) { | |
937f6879 KH |
99 | if (desc->immediate > 0) |
100 | config_rom[i++] = desc->immediate; | |
3038e353 KH |
101 | config_rom[i] = desc->key | (j - i); |
102 | i++; | |
103 | j += desc->length; | |
104 | } | |
105 | ||
106 | /* Update root directory length. */ | |
107 | config_rom[5] = (i - 5 - 1) << 16; | |
108 | ||
109 | /* End of root directory, now copy in descriptors. */ | |
110 | list_for_each_entry (desc, &descriptor_list, link) { | |
111 | memcpy(&config_rom[i], desc->data, desc->length * 4); | |
112 | i += desc->length; | |
113 | } | |
114 | ||
115 | /* Calculate CRCs for all blocks in the config rom. This | |
116 | * assumes that CRC length and info length are identical for | |
117 | * the bus info block, which is always the case for this | |
118 | * implementation. */ | |
e175569c KH |
119 | for (i = 0; i < j; i += length + 1) |
120 | length = fw_compute_block_crc(config_rom + i); | |
3038e353 KH |
121 | |
122 | *config_rom_length = j; | |
123 | ||
124 | return config_rom; | |
125 | } | |
126 | ||
127 | static void | |
a98e2719 | 128 | update_config_roms(void) |
3038e353 KH |
129 | { |
130 | struct fw_card *card; | |
131 | u32 *config_rom; | |
132 | size_t length; | |
133 | ||
134 | list_for_each_entry (card, &card_list, link) { | |
135 | config_rom = generate_config_rom(card, &length); | |
136 | card->driver->set_config_rom(card, config_rom, length); | |
137 | } | |
138 | } | |
139 | ||
140 | int | |
a98e2719 | 141 | fw_core_add_descriptor(struct fw_descriptor *desc) |
3038e353 KH |
142 | { |
143 | size_t i; | |
144 | ||
c781c06d KH |
145 | /* |
146 | * Check descriptor is valid; the length of all blocks in the | |
3038e353 | 147 | * descriptor has to add up to exactly the length of the |
c781c06d KH |
148 | * block. |
149 | */ | |
3038e353 KH |
150 | i = 0; |
151 | while (i < desc->length) | |
152 | i += (desc->data[i] >> 16) + 1; | |
153 | ||
154 | if (i != desc->length) | |
66dea3e5 | 155 | return -EINVAL; |
3038e353 | 156 | |
6a5033be | 157 | mutex_lock(&card_mutex); |
3038e353 | 158 | |
a98e2719 | 159 | list_add_tail(&desc->link, &descriptor_list); |
3038e353 | 160 | descriptor_count++; |
937f6879 KH |
161 | if (desc->immediate > 0) |
162 | descriptor_count++; | |
3038e353 KH |
163 | update_config_roms(); |
164 | ||
6a5033be | 165 | mutex_unlock(&card_mutex); |
3038e353 KH |
166 | |
167 | return 0; | |
168 | } | |
169 | EXPORT_SYMBOL(fw_core_add_descriptor); | |
170 | ||
171 | void | |
a98e2719 | 172 | fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 173 | { |
6a5033be | 174 | mutex_lock(&card_mutex); |
3038e353 KH |
175 | |
176 | list_del(&desc->link); | |
177 | descriptor_count--; | |
937f6879 KH |
178 | if (desc->immediate > 0) |
179 | descriptor_count--; | |
3038e353 KH |
180 | update_config_roms(); |
181 | ||
6a5033be | 182 | mutex_unlock(&card_mutex); |
3038e353 KH |
183 | } |
184 | EXPORT_SYMBOL(fw_core_remove_descriptor); | |
185 | ||
83db801c KH |
186 | static const char gap_count_table[] = { |
187 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
188 | }; | |
189 | ||
931c4834 KH |
190 | struct bm_data { |
191 | struct fw_transaction t; | |
192 | struct { | |
193 | __be32 arg; | |
194 | __be32 data; | |
195 | } lock; | |
196 | u32 old; | |
197 | int rcode; | |
198 | struct completion done; | |
199 | }; | |
200 | ||
19a15b93 | 201 | static void |
931c4834 KH |
202 | complete_bm_lock(struct fw_card *card, int rcode, |
203 | void *payload, size_t length, void *data) | |
204 | { | |
205 | struct bm_data *bmd = data; | |
206 | ||
207 | if (rcode == RCODE_COMPLETE) | |
208 | bmd->old = be32_to_cpu(*(__be32 *) payload); | |
209 | bmd->rcode = rcode; | |
210 | complete(&bmd->done); | |
211 | } | |
212 | ||
213 | static void | |
214 | fw_card_bm_work(struct work_struct *work) | |
19a15b93 | 215 | { |
83db801c | 216 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
15803478 SR |
217 | struct fw_device *root_device; |
218 | struct fw_node *root_node, *local_node; | |
931c4834 | 219 | struct bm_data bmd; |
19a15b93 | 220 | unsigned long flags; |
931c4834 KH |
221 | int root_id, new_root_id, irm_id, gap_count, generation, grace; |
222 | int do_reset = 0; | |
19a15b93 KH |
223 | |
224 | spin_lock_irqsave(&card->lock, flags); | |
15803478 SR |
225 | local_node = card->local_node; |
226 | root_node = card->root_node; | |
227 | ||
228 | if (local_node == NULL) { | |
229 | spin_unlock_irqrestore(&card->lock, flags); | |
230 | return; | |
231 | } | |
232 | fw_node_get(local_node); | |
233 | fw_node_get(root_node); | |
19a15b93 KH |
234 | |
235 | generation = card->generation; | |
15803478 SR |
236 | root_device = root_node->data; |
237 | if (root_device) | |
238 | fw_device_get(root_device); | |
239 | root_id = root_node->node_id; | |
931c4834 KH |
240 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10)); |
241 | ||
242 | if (card->bm_generation + 1 == generation || | |
243 | (card->bm_generation != generation && grace)) { | |
c781c06d KH |
244 | /* |
245 | * This first step is to figure out who is IRM and | |
931c4834 KH |
246 | * then try to become bus manager. If the IRM is not |
247 | * well defined (e.g. does not have an active link | |
248 | * layer or does not responds to our lock request, we | |
249 | * will have to do a little vigilante bus management. | |
250 | * In that case, we do a goto into the gap count logic | |
251 | * so that when we do the reset, we still optimize the | |
252 | * gap count. That could well save a reset in the | |
c781c06d KH |
253 | * next generation. |
254 | */ | |
931c4834 KH |
255 | |
256 | irm_id = card->irm_node->node_id; | |
257 | if (!card->irm_node->link_on) { | |
15803478 | 258 | new_root_id = local_node->node_id; |
931c4834 KH |
259 | fw_notify("IRM has link off, making local node (%02x) root.\n", |
260 | new_root_id); | |
261 | goto pick_me; | |
262 | } | |
263 | ||
264 | bmd.lock.arg = cpu_to_be32(0x3f); | |
15803478 | 265 | bmd.lock.data = cpu_to_be32(local_node->node_id); |
931c4834 KH |
266 | |
267 | spin_unlock_irqrestore(&card->lock, flags); | |
268 | ||
269 | init_completion(&bmd.done); | |
270 | fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP, | |
271 | irm_id, generation, | |
272 | SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
2d826cc5 | 273 | &bmd.lock, sizeof(bmd.lock), |
931c4834 KH |
274 | complete_bm_lock, &bmd); |
275 | wait_for_completion(&bmd.done); | |
276 | ||
277 | if (bmd.rcode == RCODE_GENERATION) { | |
c781c06d KH |
278 | /* |
279 | * Another bus reset happened. Just return, | |
280 | * the BM work has been rescheduled. | |
281 | */ | |
15803478 | 282 | goto out; |
931c4834 KH |
283 | } |
284 | ||
285 | if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f) | |
286 | /* Somebody else is BM, let them do the work. */ | |
15803478 | 287 | goto out; |
931c4834 KH |
288 | |
289 | spin_lock_irqsave(&card->lock, flags); | |
290 | if (bmd.rcode != RCODE_COMPLETE) { | |
c781c06d KH |
291 | /* |
292 | * The lock request failed, maybe the IRM | |
931c4834 KH |
293 | * isn't really IRM capable after all. Let's |
294 | * do a bus reset and pick the local node as | |
c781c06d KH |
295 | * root, and thus, IRM. |
296 | */ | |
15803478 | 297 | new_root_id = local_node->node_id; |
931c4834 KH |
298 | fw_notify("BM lock failed, making local node (%02x) root.\n", |
299 | new_root_id); | |
300 | goto pick_me; | |
301 | } | |
302 | } else if (card->bm_generation != generation) { | |
c781c06d KH |
303 | /* |
304 | * OK, we weren't BM in the last generation, and it's | |
931c4834 | 305 | * less than 100ms since last bus reset. Reschedule |
c781c06d KH |
306 | * this task 100ms from now. |
307 | */ | |
931c4834 KH |
308 | spin_unlock_irqrestore(&card->lock, flags); |
309 | schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10)); | |
15803478 | 310 | goto out; |
931c4834 KH |
311 | } |
312 | ||
c781c06d KH |
313 | /* |
314 | * We're bus manager for this generation, so next step is to | |
931c4834 | 315 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
316 | * optimization. |
317 | */ | |
931c4834 | 318 | card->bm_generation = generation; |
19a15b93 | 319 | |
15803478 | 320 | if (root_device == NULL) { |
c781c06d KH |
321 | /* |
322 | * Either link_on is false, or we failed to read the | |
323 | * config rom. In either case, pick another root. | |
324 | */ | |
15803478 SR |
325 | new_root_id = local_node->node_id; |
326 | } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) { | |
c781c06d KH |
327 | /* |
328 | * If we haven't probed this device yet, bail out now | |
329 | * and let's try again once that's done. | |
330 | */ | |
931c4834 | 331 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 SR |
332 | goto out; |
333 | } else if (root_device->config_rom[2] & BIB_CMC) { | |
c781c06d KH |
334 | /* |
335 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
336 | * STATE_CLEAR register of this node, as described in |
337 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
338 | * packet for this node. |
339 | */ | |
931c4834 | 340 | new_root_id = root_id; |
83db801c | 341 | } else { |
c781c06d KH |
342 | /* |
343 | * Current root has an active link layer and we | |
19a15b93 | 344 | * successfully read the config rom, but it's not |
c781c06d KH |
345 | * cycle master capable. |
346 | */ | |
15803478 | 347 | new_root_id = local_node->node_id; |
83db801c KH |
348 | } |
349 | ||
931c4834 | 350 | pick_me: |
24d40125 SR |
351 | /* |
352 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
353 | * the typically much larger 1394b beta repeater delays though. | |
354 | */ | |
355 | if (!card->beta_repeaters_present && | |
15803478 SR |
356 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
357 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
358 | else |
359 | gap_count = 63; | |
360 | ||
c781c06d KH |
361 | /* |
362 | * Finally, figure out if we should do a reset or not. If we've | |
83db801c | 363 | * done less that 5 resets with the same physical topology and we |
c781c06d KH |
364 | * have either a new root or a new gap count setting, let's do it. |
365 | */ | |
19a15b93 | 366 | |
931c4834 KH |
367 | if (card->bm_retries++ < 5 && |
368 | (card->gap_count != gap_count || new_root_id != root_id)) | |
83db801c | 369 | do_reset = 1; |
19a15b93 KH |
370 | |
371 | spin_unlock_irqrestore(&card->lock, flags); | |
372 | ||
83db801c KH |
373 | if (do_reset) { |
374 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
375 | card->index, new_root_id, gap_count); |
376 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 KH |
377 | fw_core_initiate_bus_reset(card, 1); |
378 | } | |
15803478 SR |
379 | out: |
380 | if (root_device) | |
381 | fw_device_put(root_device); | |
382 | fw_node_put(root_node); | |
383 | fw_node_put(local_node); | |
19a15b93 KH |
384 | } |
385 | ||
3038e353 KH |
386 | static void |
387 | flush_timer_callback(unsigned long data) | |
388 | { | |
389 | struct fw_card *card = (struct fw_card *)data; | |
390 | ||
391 | fw_flush_transactions(card); | |
392 | } | |
393 | ||
394 | void | |
21ebcd12 | 395 | fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver, |
3038e353 KH |
396 | struct device *device) |
397 | { | |
bbf19db3 | 398 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 399 | |
49e1179b | 400 | kref_init(&card->kref); |
bbf19db3 | 401 | card->index = atomic_inc_return(&index); |
5e20c282 | 402 | card->driver = driver; |
3038e353 | 403 | card->device = device; |
5e20c282 SR |
404 | card->current_tlabel = 0; |
405 | card->tlabel_mask = 0; | |
3038e353 KH |
406 | card->color = 0; |
407 | ||
5e20c282 | 408 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 KH |
409 | spin_lock_init(&card->lock); |
410 | setup_timer(&card->flush_timer, | |
411 | flush_timer_callback, (unsigned long)card); | |
412 | ||
413 | card->local_node = NULL; | |
414 | ||
931c4834 | 415 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
416 | } |
417 | EXPORT_SYMBOL(fw_card_initialize); | |
418 | ||
419 | int | |
420 | fw_card_add(struct fw_card *card, | |
421 | u32 max_receive, u32 link_speed, u64 guid) | |
422 | { | |
3038e353 KH |
423 | u32 *config_rom; |
424 | size_t length; | |
425 | ||
426 | card->max_receive = max_receive; | |
427 | card->link_speed = link_speed; | |
428 | card->guid = guid; | |
429 | ||
c781c06d KH |
430 | /* |
431 | * The subsystem grabs a reference when the card is added and | |
432 | * drops it when the driver calls fw_core_remove_card. | |
433 | */ | |
3038e353 KH |
434 | fw_card_get(card); |
435 | ||
6a5033be | 436 | mutex_lock(&card_mutex); |
a98e2719 | 437 | config_rom = generate_config_rom(card, &length); |
3038e353 | 438 | list_add_tail(&card->link, &card_list); |
6a5033be | 439 | mutex_unlock(&card_mutex); |
3038e353 KH |
440 | |
441 | return card->driver->enable(card, config_rom, length); | |
442 | } | |
443 | EXPORT_SYMBOL(fw_card_add); | |
444 | ||
445 | ||
c781c06d KH |
446 | /* |
447 | * The next few functions implements a dummy driver that use once a | |
3038e353 KH |
448 | * card driver shuts down an fw_card. This allows the driver to |
449 | * cleanly unload, as all IO to the card will be handled by the dummy | |
450 | * driver instead of calling into the (possibly) unloaded module. The | |
c781c06d KH |
451 | * dummy driver just fails all IO. |
452 | */ | |
3038e353 KH |
453 | |
454 | static int | |
455 | dummy_enable(struct fw_card *card, u32 *config_rom, size_t length) | |
456 | { | |
457 | BUG(); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | static int | |
462 | dummy_update_phy_reg(struct fw_card *card, int address, | |
463 | int clear_bits, int set_bits) | |
464 | { | |
465 | return -ENODEV; | |
466 | } | |
467 | ||
468 | static int | |
469 | dummy_set_config_rom(struct fw_card *card, | |
470 | u32 *config_rom, size_t length) | |
471 | { | |
c781c06d KH |
472 | /* |
473 | * We take the card out of card_list before setting the dummy | |
474 | * driver, so this should never get called. | |
475 | */ | |
3038e353 KH |
476 | BUG(); |
477 | return -1; | |
478 | } | |
479 | ||
480 | static void | |
481 | dummy_send_request(struct fw_card *card, struct fw_packet *packet) | |
482 | { | |
5e20c282 | 483 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
484 | } |
485 | ||
486 | static void | |
487 | dummy_send_response(struct fw_card *card, struct fw_packet *packet) | |
488 | { | |
5e20c282 | 489 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
490 | } |
491 | ||
730c32f5 KH |
492 | static int |
493 | dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) | |
494 | { | |
495 | return -ENOENT; | |
496 | } | |
497 | ||
3038e353 KH |
498 | static int |
499 | dummy_enable_phys_dma(struct fw_card *card, | |
500 | int node_id, int generation) | |
501 | { | |
502 | return -ENODEV; | |
503 | } | |
504 | ||
505 | static struct fw_card_driver dummy_driver = { | |
5e20c282 | 506 | .name = "dummy", |
3038e353 KH |
507 | .enable = dummy_enable, |
508 | .update_phy_reg = dummy_update_phy_reg, | |
509 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 510 | .send_request = dummy_send_request, |
730c32f5 | 511 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 512 | .send_response = dummy_send_response, |
5af4e5ea | 513 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
514 | }; |
515 | ||
516 | void | |
517 | fw_core_remove_card(struct fw_card *card) | |
518 | { | |
ecab4133 MB |
519 | card->driver->update_phy_reg(card, 4, |
520 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
521 | fw_core_initiate_bus_reset(card, 1); |
522 | ||
6a5033be | 523 | mutex_lock(&card_mutex); |
3038e353 | 524 | list_del(&card->link); |
6a5033be | 525 | mutex_unlock(&card_mutex); |
3038e353 KH |
526 | |
527 | /* Set up the dummy driver. */ | |
528 | card->driver = &dummy_driver; | |
529 | ||
3038e353 | 530 | fw_destroy_nodes(card); |
8a2d9ed3 SR |
531 | flush_scheduled_work(); |
532 | ||
533 | fw_flush_transactions(card); | |
534 | del_timer_sync(&card->flush_timer); | |
3038e353 | 535 | |
49e1179b | 536 | fw_card_put(card); |
3038e353 KH |
537 | } |
538 | EXPORT_SYMBOL(fw_core_remove_card); | |
539 | ||
540 | struct fw_card * | |
541 | fw_card_get(struct fw_card *card) | |
542 | { | |
49e1179b | 543 | kref_get(&card->kref); |
3038e353 KH |
544 | |
545 | return card; | |
546 | } | |
547 | EXPORT_SYMBOL(fw_card_get); | |
548 | ||
49e1179b KH |
549 | static void |
550 | release_card(struct kref *kref) | |
551 | { | |
552 | struct fw_card *card = container_of(kref, struct fw_card, kref); | |
553 | ||
554 | kfree(card); | |
555 | } | |
556 | ||
c781c06d KH |
557 | /* |
558 | * An assumption for fw_card_put() is that the card driver allocates | |
3038e353 | 559 | * the fw_card struct with kalloc and that it has been shut down |
c781c06d KH |
560 | * before the last ref is dropped. |
561 | */ | |
3038e353 KH |
562 | void |
563 | fw_card_put(struct fw_card *card) | |
564 | { | |
49e1179b | 565 | kref_put(&card->kref, release_card); |
3038e353 KH |
566 | } |
567 | EXPORT_SYMBOL(fw_card_put); | |
568 | ||
569 | int | |
570 | fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) | |
571 | { | |
ecab4133 | 572 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
573 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
574 | ||
575 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
576 | } |
577 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |