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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 | ||
e8ca9702 | 19 | #include <linux/bug.h> |
459f7923 SR |
20 | #include <linux/completion.h> |
21 | #include <linux/crc-itu-t.h> | |
3038e353 | 22 | #include <linux/device.h> |
459f7923 | 23 | #include <linux/errno.h> |
77c9a5da SR |
24 | #include <linux/firewire.h> |
25 | #include <linux/firewire-constants.h> | |
e8ca9702 SR |
26 | #include <linux/jiffies.h> |
27 | #include <linux/kernel.h> | |
459f7923 | 28 | #include <linux/kref.h> |
e8ca9702 | 29 | #include <linux/list.h> |
459f7923 | 30 | #include <linux/module.h> |
6a5033be | 31 | #include <linux/mutex.h> |
e8ca9702 | 32 | #include <linux/spinlock.h> |
e8ca9702 SR |
33 | #include <linux/workqueue.h> |
34 | ||
35 | #include <asm/atomic.h> | |
36 | #include <asm/byteorder.h> | |
459f7923 | 37 | |
77c9a5da | 38 | #include "core.h" |
3038e353 | 39 | |
cb7c96da | 40 | int fw_compute_block_crc(__be32 *block) |
8e85973e SR |
41 | { |
42 | int length; | |
43 | u16 crc; | |
44 | ||
45 | length = (be32_to_cpu(block[0]) >> 16) & 0xff; | |
46 | crc = crc_itu_t(0, (u8 *)&block[1], length * 4); | |
47 | *block |= cpu_to_be32(crc); | |
48 | ||
49 | return length; | |
50 | } | |
51 | ||
6a5033be | 52 | static DEFINE_MUTEX(card_mutex); |
3038e353 KH |
53 | static LIST_HEAD(card_list); |
54 | ||
55 | static LIST_HEAD(descriptor_list); | |
56 | static int descriptor_count; | |
57 | ||
fe242579 | 58 | static __be32 tmp_config_rom[256]; |
e300839d SR |
59 | /* ROM header, bus info block, root dir header, capabilities = 7 quadlets */ |
60 | static size_t config_rom_length = 1 + 4 + 1 + 1; | |
fe242579 | 61 | |
a77754a7 KH |
62 | #define BIB_CRC(v) ((v) << 0) |
63 | #define BIB_CRC_LENGTH(v) ((v) << 16) | |
64 | #define BIB_INFO_LENGTH(v) ((v) << 24) | |
edd5bdaf | 65 | #define BIB_BUS_NAME 0x31333934 /* "1394" */ |
a77754a7 KH |
66 | #define BIB_LINK_SPEED(v) ((v) << 0) |
67 | #define BIB_GENERATION(v) ((v) << 4) | |
68 | #define BIB_MAX_ROM(v) ((v) << 8) | |
69 | #define BIB_MAX_RECEIVE(v) ((v) << 12) | |
70 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) | |
71 | #define BIB_PMC ((1) << 27) | |
72 | #define BIB_BMC ((1) << 28) | |
73 | #define BIB_ISC ((1) << 29) | |
74 | #define BIB_CMC ((1) << 30) | |
edd5bdaf SR |
75 | #define BIB_IRMC ((1) << 31) |
76 | #define NODE_CAPABILITIES 0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */ | |
3038e353 | 77 | |
e300839d | 78 | static void generate_config_rom(struct fw_card *card, __be32 *config_rom) |
3038e353 KH |
79 | { |
80 | struct fw_descriptor *desc; | |
8e85973e | 81 | int i, j, k, length; |
3038e353 | 82 | |
c781c06d KH |
83 | /* |
84 | * Initialize contents of config rom buffer. On the OHCI | |
5e20c282 SR |
85 | * controller, block reads to the config rom accesses the host |
86 | * memory, but quadlet read access the hardware bus info block | |
87 | * registers. That's just crack, but it means we should make | |
2cc489c2 | 88 | * sure the contents of bus info block in host memory matches |
c781c06d KH |
89 | * the version stored in the OHCI registers. |
90 | */ | |
3038e353 | 91 | |
8e85973e SR |
92 | config_rom[0] = cpu_to_be32( |
93 | BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0)); | |
edd5bdaf | 94 | config_rom[1] = cpu_to_be32(BIB_BUS_NAME); |
8e85973e | 95 | config_rom[2] = cpu_to_be32( |
a77754a7 KH |
96 | BIB_LINK_SPEED(card->link_speed) | |
97 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | | |
98 | BIB_MAX_ROM(2) | | |
99 | BIB_MAX_RECEIVE(card->max_receive) | | |
edd5bdaf | 100 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IRMC); |
8e85973e SR |
101 | config_rom[3] = cpu_to_be32(card->guid >> 32); |
102 | config_rom[4] = cpu_to_be32(card->guid); | |
3038e353 KH |
103 | |
104 | /* Generate root directory. */ | |
edd5bdaf | 105 | config_rom[6] = cpu_to_be32(NODE_CAPABILITIES); |
8e85973e SR |
106 | i = 7; |
107 | j = 7 + descriptor_count; | |
3038e353 KH |
108 | |
109 | /* Generate root directory entries for descriptors. */ | |
110 | list_for_each_entry (desc, &descriptor_list, link) { | |
937f6879 | 111 | if (desc->immediate > 0) |
8e85973e SR |
112 | config_rom[i++] = cpu_to_be32(desc->immediate); |
113 | config_rom[i] = cpu_to_be32(desc->key | (j - i)); | |
3038e353 KH |
114 | i++; |
115 | j += desc->length; | |
116 | } | |
117 | ||
118 | /* Update root directory length. */ | |
8e85973e | 119 | config_rom[5] = cpu_to_be32((i - 5 - 1) << 16); |
3038e353 KH |
120 | |
121 | /* End of root directory, now copy in descriptors. */ | |
122 | list_for_each_entry (desc, &descriptor_list, link) { | |
8e85973e SR |
123 | for (k = 0; k < desc->length; k++) |
124 | config_rom[i + k] = cpu_to_be32(desc->data[k]); | |
3038e353 KH |
125 | i += desc->length; |
126 | } | |
127 | ||
128 | /* Calculate CRCs for all blocks in the config rom. This | |
129 | * assumes that CRC length and info length are identical for | |
130 | * the bus info block, which is always the case for this | |
131 | * implementation. */ | |
e175569c | 132 | for (i = 0; i < j; i += length + 1) |
cb7c96da | 133 | length = fw_compute_block_crc(config_rom + i); |
3038e353 | 134 | |
e300839d | 135 | WARN_ON(j != config_rom_length); |
3038e353 KH |
136 | } |
137 | ||
53dca511 | 138 | static void update_config_roms(void) |
3038e353 KH |
139 | { |
140 | struct fw_card *card; | |
3038e353 KH |
141 | |
142 | list_for_each_entry (card, &card_list, link) { | |
e300839d SR |
143 | generate_config_rom(card, tmp_config_rom); |
144 | card->driver->set_config_rom(card, tmp_config_rom, | |
145 | config_rom_length); | |
3038e353 KH |
146 | } |
147 | } | |
148 | ||
e300839d SR |
149 | static size_t required_space(struct fw_descriptor *desc) |
150 | { | |
151 | /* descriptor + entry into root dir + optional immediate entry */ | |
152 | return desc->length + 1 + (desc->immediate > 0 ? 1 : 0); | |
153 | } | |
154 | ||
53dca511 | 155 | int fw_core_add_descriptor(struct fw_descriptor *desc) |
3038e353 KH |
156 | { |
157 | size_t i; | |
e300839d | 158 | int ret; |
3038e353 | 159 | |
c781c06d KH |
160 | /* |
161 | * Check descriptor is valid; the length of all blocks in the | |
3038e353 | 162 | * descriptor has to add up to exactly the length of the |
c781c06d KH |
163 | * block. |
164 | */ | |
3038e353 KH |
165 | i = 0; |
166 | while (i < desc->length) | |
167 | i += (desc->data[i] >> 16) + 1; | |
168 | ||
169 | if (i != desc->length) | |
66dea3e5 | 170 | return -EINVAL; |
3038e353 | 171 | |
6a5033be | 172 | mutex_lock(&card_mutex); |
3038e353 | 173 | |
e300839d SR |
174 | if (config_rom_length + required_space(desc) > 256) { |
175 | ret = -EBUSY; | |
176 | } else { | |
177 | list_add_tail(&desc->link, &descriptor_list); | |
178 | config_rom_length += required_space(desc); | |
937f6879 | 179 | descriptor_count++; |
e300839d SR |
180 | if (desc->immediate > 0) |
181 | descriptor_count++; | |
182 | update_config_roms(); | |
183 | ret = 0; | |
184 | } | |
3038e353 | 185 | |
6a5033be | 186 | mutex_unlock(&card_mutex); |
3038e353 | 187 | |
e300839d | 188 | return ret; |
3038e353 | 189 | } |
c76acec6 | 190 | EXPORT_SYMBOL(fw_core_add_descriptor); |
3038e353 | 191 | |
53dca511 | 192 | void fw_core_remove_descriptor(struct fw_descriptor *desc) |
3038e353 | 193 | { |
6a5033be | 194 | mutex_lock(&card_mutex); |
3038e353 KH |
195 | |
196 | list_del(&desc->link); | |
e300839d | 197 | config_rom_length -= required_space(desc); |
3038e353 | 198 | descriptor_count--; |
937f6879 KH |
199 | if (desc->immediate > 0) |
200 | descriptor_count--; | |
3038e353 KH |
201 | update_config_roms(); |
202 | ||
6a5033be | 203 | mutex_unlock(&card_mutex); |
3038e353 | 204 | } |
c76acec6 | 205 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
3038e353 | 206 | |
cbae787c | 207 | static void allocate_broadcast_channel(struct fw_card *card, int generation) |
6104ee92 | 208 | { |
cbae787c SR |
209 | int channel, bandwidth = 0; |
210 | ||
6fdc0370 SR |
211 | fw_iso_resource_manage(card, generation, 1ULL << 31, &channel, |
212 | &bandwidth, true, card->bm_transaction_data); | |
cbae787c | 213 | if (channel == 31) { |
7889b60e SR |
214 | card->broadcast_channel_allocated = true; |
215 | device_for_each_child(card->device, (void *)(long)generation, | |
099d5414 | 216 | fw_device_set_broadcast_channel); |
6104ee92 | 217 | } |
6104ee92 | 218 | } |
6104ee92 | 219 | |
83db801c KH |
220 | static const char gap_count_table[] = { |
221 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 | |
222 | }; | |
223 | ||
53dca511 | 224 | void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) |
0fa1986f | 225 | { |
0fa1986f | 226 | fw_card_get(card); |
9fb551bf | 227 | if (!schedule_delayed_work(&card->work, delay)) |
0fa1986f JF |
228 | fw_card_put(card); |
229 | } | |
230 | ||
53dca511 | 231 | static void fw_card_bm_work(struct work_struct *work) |
19a15b93 | 232 | { |
83db801c | 233 | struct fw_card *card = container_of(work, struct fw_card, work.work); |
10389536 | 234 | struct fw_device *root_device, *irm_device; |
cbae787c | 235 | struct fw_node *root_node; |
19a15b93 | 236 | unsigned long flags; |
cbae787c SR |
237 | int root_id, new_root_id, irm_id, local_id; |
238 | int gap_count, generation, grace, rcode; | |
25b1c3d8 | 239 | bool do_reset = false; |
62305823 SR |
240 | bool root_device_is_running; |
241 | bool root_device_is_cmc; | |
10389536 | 242 | bool irm_is_1394_1995_only; |
19a15b93 KH |
243 | |
244 | spin_lock_irqsave(&card->lock, flags); | |
15803478 | 245 | |
cbae787c | 246 | if (card->local_node == NULL) { |
15803478 | 247 | spin_unlock_irqrestore(&card->lock, flags); |
0fa1986f | 248 | goto out_put_card; |
15803478 | 249 | } |
19a15b93 KH |
250 | |
251 | generation = card->generation; | |
10389536 | 252 | |
cbae787c SR |
253 | root_node = card->root_node; |
254 | fw_node_get(root_node); | |
15803478 | 255 | root_device = root_node->data; |
62305823 SR |
256 | root_device_is_running = root_device && |
257 | atomic_read(&root_device->state) == FW_DEVICE_RUNNING; | |
258 | root_device_is_cmc = root_device && root_device->cmc; | |
10389536 SR |
259 | |
260 | irm_device = card->irm_node->data; | |
261 | irm_is_1394_1995_only = irm_device && irm_device->config_rom && | |
262 | (irm_device->config_rom[2] & 0x000000f0) == 0; | |
263 | ||
cbae787c SR |
264 | root_id = root_node->node_id; |
265 | irm_id = card->irm_node->node_id; | |
266 | local_id = card->local_node->node_id; | |
e1dc7cab SR |
267 | |
268 | grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 8)); | |
269 | ||
8cd0bbbd | 270 | if (is_next_generation(generation, card->bm_generation) || |
931c4834 | 271 | (card->bm_generation != generation && grace)) { |
c781c06d KH |
272 | /* |
273 | * This first step is to figure out who is IRM and | |
931c4834 KH |
274 | * then try to become bus manager. If the IRM is not |
275 | * well defined (e.g. does not have an active link | |
276 | * layer or does not responds to our lock request, we | |
277 | * will have to do a little vigilante bus management. | |
278 | * In that case, we do a goto into the gap count logic | |
279 | * so that when we do the reset, we still optimize the | |
280 | * gap count. That could well save a reset in the | |
c781c06d KH |
281 | * next generation. |
282 | */ | |
931c4834 | 283 | |
cbae787c SR |
284 | if (!card->irm_node->link_on) { |
285 | new_root_id = local_id; | |
10389536 SR |
286 | fw_notify("%s, making local node (%02x) root.\n", |
287 | "IRM has link off", new_root_id); | |
288 | goto pick_me; | |
289 | } | |
290 | ||
291 | if (irm_is_1394_1995_only) { | |
292 | new_root_id = local_id; | |
293 | fw_notify("%s, making local node (%02x) root.\n", | |
294 | "IRM is not 1394a compliant", new_root_id); | |
931c4834 KH |
295 | goto pick_me; |
296 | } | |
297 | ||
6fdc0370 SR |
298 | card->bm_transaction_data[0] = cpu_to_be32(0x3f); |
299 | card->bm_transaction_data[1] = cpu_to_be32(local_id); | |
931c4834 KH |
300 | |
301 | spin_unlock_irqrestore(&card->lock, flags); | |
302 | ||
1e119fa9 JF |
303 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
304 | irm_id, generation, SCODE_100, | |
305 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, | |
6fdc0370 SR |
306 | card->bm_transaction_data, |
307 | sizeof(card->bm_transaction_data)); | |
931c4834 | 308 | |
1e119fa9 JF |
309 | if (rcode == RCODE_GENERATION) |
310 | /* Another bus reset, BM work has been rescheduled. */ | |
15803478 | 311 | goto out; |
931c4834 | 312 | |
1e119fa9 | 313 | if (rcode == RCODE_COMPLETE && |
6fdc0370 | 314 | card->bm_transaction_data[0] != cpu_to_be32(0x3f)) { |
cbae787c SR |
315 | |
316 | /* Somebody else is BM. Only act as IRM. */ | |
317 | if (local_id == irm_id) | |
318 | allocate_broadcast_channel(card, generation); | |
319 | ||
15803478 | 320 | goto out; |
6104ee92 | 321 | } |
931c4834 KH |
322 | |
323 | spin_lock_irqsave(&card->lock, flags); | |
1e119fa9 JF |
324 | |
325 | if (rcode != RCODE_COMPLETE) { | |
c781c06d KH |
326 | /* |
327 | * The lock request failed, maybe the IRM | |
931c4834 KH |
328 | * isn't really IRM capable after all. Let's |
329 | * do a bus reset and pick the local node as | |
c781c06d KH |
330 | * root, and thus, IRM. |
331 | */ | |
cbae787c | 332 | new_root_id = local_id; |
10389536 SR |
333 | fw_notify("%s, making local node (%02x) root.\n", |
334 | "BM lock failed", new_root_id); | |
931c4834 KH |
335 | goto pick_me; |
336 | } | |
337 | } else if (card->bm_generation != generation) { | |
c781c06d | 338 | /* |
e1dc7cab SR |
339 | * We weren't BM in the last generation, and the last |
340 | * bus reset is less than 125ms ago. Reschedule this job. | |
c781c06d | 341 | */ |
931c4834 | 342 | spin_unlock_irqrestore(&card->lock, flags); |
e1dc7cab | 343 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
15803478 | 344 | goto out; |
931c4834 KH |
345 | } |
346 | ||
c781c06d KH |
347 | /* |
348 | * We're bus manager for this generation, so next step is to | |
931c4834 | 349 | * make sure we have an active cycle master and do gap count |
c781c06d KH |
350 | * optimization. |
351 | */ | |
931c4834 | 352 | card->bm_generation = generation; |
19a15b93 | 353 | |
15803478 | 354 | if (root_device == NULL) { |
c781c06d KH |
355 | /* |
356 | * Either link_on is false, or we failed to read the | |
357 | * config rom. In either case, pick another root. | |
358 | */ | |
cbae787c | 359 | new_root_id = local_id; |
62305823 | 360 | } else if (!root_device_is_running) { |
c781c06d KH |
361 | /* |
362 | * If we haven't probed this device yet, bail out now | |
363 | * and let's try again once that's done. | |
364 | */ | |
931c4834 | 365 | spin_unlock_irqrestore(&card->lock, flags); |
15803478 | 366 | goto out; |
62305823 | 367 | } else if (root_device_is_cmc) { |
c781c06d KH |
368 | /* |
369 | * FIXME: I suppose we should set the cmstr bit in the | |
19a15b93 KH |
370 | * STATE_CLEAR register of this node, as described in |
371 | * 1394-1995, 8.4.2.6. Also, send out a force root | |
c781c06d KH |
372 | * packet for this node. |
373 | */ | |
931c4834 | 374 | new_root_id = root_id; |
83db801c | 375 | } else { |
c781c06d KH |
376 | /* |
377 | * Current root has an active link layer and we | |
19a15b93 | 378 | * successfully read the config rom, but it's not |
c781c06d KH |
379 | * cycle master capable. |
380 | */ | |
cbae787c | 381 | new_root_id = local_id; |
83db801c KH |
382 | } |
383 | ||
931c4834 | 384 | pick_me: |
24d40125 SR |
385 | /* |
386 | * Pick a gap count from 1394a table E-1. The table doesn't cover | |
387 | * the typically much larger 1394b beta repeater delays though. | |
388 | */ | |
389 | if (!card->beta_repeaters_present && | |
15803478 SR |
390 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
391 | gap_count = gap_count_table[root_node->max_hops]; | |
83db801c KH |
392 | else |
393 | gap_count = 63; | |
394 | ||
c781c06d | 395 | /* |
25b1c3d8 SR |
396 | * Finally, figure out if we should do a reset or not. If we have |
397 | * done less than 5 resets with the same physical topology and we | |
c781c06d KH |
398 | * have either a new root or a new gap count setting, let's do it. |
399 | */ | |
19a15b93 | 400 | |
931c4834 KH |
401 | if (card->bm_retries++ < 5 && |
402 | (card->gap_count != gap_count || new_root_id != root_id)) | |
25b1c3d8 | 403 | do_reset = true; |
19a15b93 KH |
404 | |
405 | spin_unlock_irqrestore(&card->lock, flags); | |
406 | ||
83db801c KH |
407 | if (do_reset) { |
408 | fw_notify("phy config: card %d, new root=%x, gap_count=%d\n", | |
931c4834 KH |
409 | card->index, new_root_id, gap_count); |
410 | fw_send_phy_config(card, new_root_id, generation, gap_count); | |
19a15b93 | 411 | fw_core_initiate_bus_reset(card, 1); |
cbae787c SR |
412 | /* Will allocate broadcast channel after the reset. */ |
413 | } else { | |
414 | if (local_id == irm_id) | |
415 | allocate_broadcast_channel(card, generation); | |
19a15b93 | 416 | } |
6104ee92 | 417 | |
15803478 | 418 | out: |
15803478 | 419 | fw_node_put(root_node); |
0fa1986f JF |
420 | out_put_card: |
421 | fw_card_put(card); | |
19a15b93 KH |
422 | } |
423 | ||
53dca511 SR |
424 | void fw_card_initialize(struct fw_card *card, |
425 | const struct fw_card_driver *driver, | |
426 | struct device *device) | |
3038e353 | 427 | { |
bbf19db3 | 428 | static atomic_t index = ATOMIC_INIT(-1); |
3038e353 | 429 | |
bbf19db3 | 430 | card->index = atomic_inc_return(&index); |
5e20c282 | 431 | card->driver = driver; |
3038e353 | 432 | card->device = device; |
5e20c282 SR |
433 | card->current_tlabel = 0; |
434 | card->tlabel_mask = 0; | |
3038e353 | 435 | card->color = 0; |
e534fe16 | 436 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
3038e353 | 437 | |
459f7923 SR |
438 | kref_init(&card->kref); |
439 | init_completion(&card->done); | |
5e20c282 | 440 | INIT_LIST_HEAD(&card->transaction_list); |
3038e353 | 441 | spin_lock_init(&card->lock); |
3038e353 KH |
442 | |
443 | card->local_node = NULL; | |
444 | ||
931c4834 | 445 | INIT_DELAYED_WORK(&card->work, fw_card_bm_work); |
3038e353 KH |
446 | } |
447 | EXPORT_SYMBOL(fw_card_initialize); | |
448 | ||
53dca511 SR |
449 | int fw_card_add(struct fw_card *card, |
450 | u32 max_receive, u32 link_speed, u64 guid) | |
3038e353 | 451 | { |
e1eff7a3 | 452 | int ret; |
3038e353 KH |
453 | |
454 | card->max_receive = max_receive; | |
455 | card->link_speed = link_speed; | |
456 | card->guid = guid; | |
457 | ||
6a5033be | 458 | mutex_lock(&card_mutex); |
3038e353 | 459 | |
e300839d SR |
460 | generate_config_rom(card, tmp_config_rom); |
461 | ret = card->driver->enable(card, tmp_config_rom, config_rom_length); | |
b171e204 SR |
462 | if (ret == 0) |
463 | list_add_tail(&card->link, &card_list); | |
464 | ||
465 | mutex_unlock(&card_mutex); | |
e1eff7a3 SR |
466 | |
467 | return ret; | |
3038e353 KH |
468 | } |
469 | EXPORT_SYMBOL(fw_card_add); | |
470 | ||
471 | ||
c781c06d | 472 | /* |
d645f4da SR |
473 | * The next few functions implement a dummy driver that is used once a card |
474 | * driver shuts down an fw_card. This allows the driver to cleanly unload, | |
475 | * as all IO to the card will be handled (and failed) by the dummy driver | |
476 | * instead of calling into the module. Only functions for iso context | |
477 | * shutdown still need to be provided by the card driver. | |
c781c06d | 478 | */ |
3038e353 | 479 | |
8e85973e SR |
480 | static int dummy_enable(struct fw_card *card, |
481 | const __be32 *config_rom, size_t length) | |
3038e353 KH |
482 | { |
483 | BUG(); | |
484 | return -1; | |
485 | } | |
486 | ||
53dca511 SR |
487 | static int dummy_update_phy_reg(struct fw_card *card, int address, |
488 | int clear_bits, int set_bits) | |
3038e353 KH |
489 | { |
490 | return -ENODEV; | |
491 | } | |
492 | ||
53dca511 | 493 | static int dummy_set_config_rom(struct fw_card *card, |
8e85973e | 494 | const __be32 *config_rom, size_t length) |
3038e353 | 495 | { |
c781c06d KH |
496 | /* |
497 | * We take the card out of card_list before setting the dummy | |
498 | * driver, so this should never get called. | |
499 | */ | |
3038e353 KH |
500 | BUG(); |
501 | return -1; | |
502 | } | |
503 | ||
53dca511 | 504 | static void dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 505 | { |
5e20c282 | 506 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
507 | } |
508 | ||
53dca511 | 509 | static void dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
3038e353 | 510 | { |
5e20c282 | 511 | packet->callback(packet, card, -ENODEV); |
3038e353 KH |
512 | } |
513 | ||
53dca511 | 514 | static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
730c32f5 KH |
515 | { |
516 | return -ENOENT; | |
517 | } | |
518 | ||
53dca511 SR |
519 | static int dummy_enable_phys_dma(struct fw_card *card, |
520 | int node_id, int generation) | |
3038e353 KH |
521 | { |
522 | return -ENODEV; | |
523 | } | |
524 | ||
d645f4da | 525 | static const struct fw_card_driver dummy_driver_template = { |
3038e353 KH |
526 | .enable = dummy_enable, |
527 | .update_phy_reg = dummy_update_phy_reg, | |
528 | .set_config_rom = dummy_set_config_rom, | |
5e20c282 | 529 | .send_request = dummy_send_request, |
730c32f5 | 530 | .cancel_packet = dummy_cancel_packet, |
5e20c282 | 531 | .send_response = dummy_send_response, |
5af4e5ea | 532 | .enable_phys_dma = dummy_enable_phys_dma, |
3038e353 KH |
533 | }; |
534 | ||
53dca511 | 535 | void fw_card_release(struct kref *kref) |
459f7923 SR |
536 | { |
537 | struct fw_card *card = container_of(kref, struct fw_card, kref); | |
538 | ||
539 | complete(&card->done); | |
540 | } | |
541 | ||
53dca511 | 542 | void fw_core_remove_card(struct fw_card *card) |
3038e353 | 543 | { |
d645f4da SR |
544 | struct fw_card_driver dummy_driver = dummy_driver_template; |
545 | ||
ecab4133 MB |
546 | card->driver->update_phy_reg(card, 4, |
547 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); | |
3038e353 KH |
548 | fw_core_initiate_bus_reset(card, 1); |
549 | ||
6a5033be | 550 | mutex_lock(&card_mutex); |
e747a5c0 | 551 | list_del_init(&card->link); |
6a5033be | 552 | mutex_unlock(&card_mutex); |
3038e353 | 553 | |
d645f4da SR |
554 | /* Switch off most of the card driver interface. */ |
555 | dummy_driver.free_iso_context = card->driver->free_iso_context; | |
556 | dummy_driver.stop_iso = card->driver->stop_iso; | |
3038e353 KH |
557 | card->driver = &dummy_driver; |
558 | ||
3038e353 | 559 | fw_destroy_nodes(card); |
459f7923 SR |
560 | |
561 | /* Wait for all users, especially device workqueue jobs, to finish. */ | |
562 | fw_card_put(card); | |
563 | wait_for_completion(&card->done); | |
8a2d9ed3 | 564 | |
1e8afea1 | 565 | WARN_ON(!list_empty(&card->transaction_list)); |
3038e353 KH |
566 | } |
567 | EXPORT_SYMBOL(fw_core_remove_card); | |
568 | ||
53dca511 | 569 | int fw_core_initiate_bus_reset(struct fw_card *card, int short_reset) |
3038e353 | 570 | { |
ecab4133 | 571 | int reg = short_reset ? 5 : 1; |
ecab4133 MB |
572 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
573 | ||
574 | return card->driver->update_phy_reg(card, reg, 0, bit); | |
3038e353 KH |
575 | } |
576 | EXPORT_SYMBOL(fw_core_initiate_bus_reset); |