]>
Commit | Line | Data |
---|---|---|
c781c06d KH |
1 | /* |
2 | * Core IEEE1394 transaction logic | |
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> |
2a0a2590 | 22 | #include <linux/completion.h> |
e8ca9702 SR |
23 | #include <linux/device.h> |
24 | #include <linux/errno.h> | |
77c9a5da | 25 | #include <linux/firewire.h> |
e8ca9702 SR |
26 | #include <linux/firewire-constants.h> |
27 | #include <linux/fs.h> | |
28 | #include <linux/init.h> | |
d6053e08 | 29 | #include <linux/idr.h> |
e8ca9702 | 30 | #include <linux/jiffies.h> |
3038e353 | 31 | #include <linux/kernel.h> |
3038e353 | 32 | #include <linux/list.h> |
e8ca9702 SR |
33 | #include <linux/module.h> |
34 | #include <linux/slab.h> | |
35 | #include <linux/spinlock.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/timer.h> | |
38 | #include <linux/types.h> | |
39 | ||
40 | #include <asm/byteorder.h> | |
3038e353 | 41 | |
77c9a5da | 42 | #include "core.h" |
3038e353 | 43 | |
a77754a7 KH |
44 | #define HEADER_PRI(pri) ((pri) << 0) |
45 | #define HEADER_TCODE(tcode) ((tcode) << 4) | |
46 | #define HEADER_RETRY(retry) ((retry) << 8) | |
47 | #define HEADER_TLABEL(tlabel) ((tlabel) << 10) | |
48 | #define HEADER_DESTINATION(destination) ((destination) << 16) | |
49 | #define HEADER_SOURCE(source) ((source) << 16) | |
50 | #define HEADER_RCODE(rcode) ((rcode) << 12) | |
51 | #define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0) | |
52 | #define HEADER_DATA_LENGTH(length) ((length) << 16) | |
53 | #define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0) | |
54 | ||
55 | #define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f) | |
56 | #define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f) | |
57 | #define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f) | |
58 | #define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff) | |
59 | #define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff) | |
60 | #define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff) | |
61 | #define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff) | |
62 | #define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff) | |
63 | ||
a7ea6782 SR |
64 | #define HEADER_DESTINATION_IS_BROADCAST(q) \ |
65 | (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f)) | |
66 | ||
77c9a5da SR |
67 | #define PHY_PACKET_CONFIG 0x0 |
68 | #define PHY_PACKET_LINK_ON 0x1 | |
69 | #define PHY_PACKET_SELF_ID 0x2 | |
70 | ||
a77754a7 KH |
71 | #define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22)) |
72 | #define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23)) | |
73 | #define PHY_IDENTIFIER(id) ((id) << 30) | |
3038e353 | 74 | |
53dca511 | 75 | static int close_transaction(struct fw_transaction *transaction, |
a38a00fd | 76 | struct fw_card *card, int rcode) |
3038e353 | 77 | { |
730c32f5 | 78 | struct fw_transaction *t; |
3038e353 KH |
79 | unsigned long flags; |
80 | ||
81 | spin_lock_irqsave(&card->lock, flags); | |
730c32f5 KH |
82 | list_for_each_entry(t, &card->transaction_list, link) { |
83 | if (t == transaction) { | |
5c40cbfe | 84 | list_del_init(&t->link); |
1e626fdc | 85 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
730c32f5 KH |
86 | break; |
87 | } | |
88 | } | |
3038e353 KH |
89 | spin_unlock_irqrestore(&card->lock, flags); |
90 | ||
730c32f5 | 91 | if (&t->link != &card->transaction_list) { |
5c40cbfe | 92 | del_timer_sync(&t->split_timeout_timer); |
a38a00fd | 93 | t->callback(card, rcode, NULL, 0, t->callback_data); |
730c32f5 KH |
94 | return 0; |
95 | } | |
96 | ||
97 | return -ENOENT; | |
3038e353 KH |
98 | } |
99 | ||
c781c06d KH |
100 | /* |
101 | * Only valid for transactions that are potentially pending (ie have | |
102 | * been sent). | |
103 | */ | |
53dca511 SR |
104 | int fw_cancel_transaction(struct fw_card *card, |
105 | struct fw_transaction *transaction) | |
730c32f5 | 106 | { |
c781c06d KH |
107 | /* |
108 | * Cancel the packet transmission if it's still queued. That | |
730c32f5 | 109 | * will call the packet transmission callback which cancels |
c781c06d KH |
110 | * the transaction. |
111 | */ | |
730c32f5 KH |
112 | |
113 | if (card->driver->cancel_packet(card, &transaction->packet) == 0) | |
114 | return 0; | |
115 | ||
c781c06d KH |
116 | /* |
117 | * If the request packet has already been sent, we need to see | |
118 | * if the transaction is still pending and remove it in that case. | |
119 | */ | |
730c32f5 | 120 | |
a38a00fd | 121 | return close_transaction(transaction, card, RCODE_CANCELLED); |
730c32f5 KH |
122 | } |
123 | EXPORT_SYMBOL(fw_cancel_transaction); | |
124 | ||
5c40cbfe CL |
125 | static void split_transaction_timeout_callback(unsigned long data) |
126 | { | |
127 | struct fw_transaction *t = (struct fw_transaction *)data; | |
128 | struct fw_card *card = t->card; | |
129 | unsigned long flags; | |
130 | ||
131 | spin_lock_irqsave(&card->lock, flags); | |
132 | if (list_empty(&t->link)) { | |
133 | spin_unlock_irqrestore(&card->lock, flags); | |
134 | return; | |
135 | } | |
136 | list_del(&t->link); | |
137 | card->tlabel_mask &= ~(1ULL << t->tlabel); | |
138 | spin_unlock_irqrestore(&card->lock, flags); | |
139 | ||
140 | card->driver->cancel_packet(card, &t->packet); | |
141 | ||
142 | /* | |
143 | * At this point cancel_packet will never call the transaction | |
144 | * callback, since we just took the transaction out of the list. | |
145 | * So do it here. | |
146 | */ | |
147 | t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); | |
148 | } | |
149 | ||
53dca511 SR |
150 | static void transmit_complete_callback(struct fw_packet *packet, |
151 | struct fw_card *card, int status) | |
3038e353 KH |
152 | { |
153 | struct fw_transaction *t = | |
154 | container_of(packet, struct fw_transaction, packet); | |
155 | ||
156 | switch (status) { | |
157 | case ACK_COMPLETE: | |
a38a00fd | 158 | close_transaction(t, card, RCODE_COMPLETE); |
3038e353 KH |
159 | break; |
160 | case ACK_PENDING: | |
161 | t->timestamp = packet->timestamp; | |
162 | break; | |
163 | case ACK_BUSY_X: | |
164 | case ACK_BUSY_A: | |
165 | case ACK_BUSY_B: | |
a38a00fd | 166 | close_transaction(t, card, RCODE_BUSY); |
3038e353 KH |
167 | break; |
168 | case ACK_DATA_ERROR: | |
a38a00fd | 169 | close_transaction(t, card, RCODE_DATA_ERROR); |
e5f49c3b | 170 | break; |
3038e353 | 171 | case ACK_TYPE_ERROR: |
a38a00fd | 172 | close_transaction(t, card, RCODE_TYPE_ERROR); |
3038e353 KH |
173 | break; |
174 | default: | |
c781c06d KH |
175 | /* |
176 | * In this case the ack is really a juju specific | |
177 | * rcode, so just forward that to the callback. | |
178 | */ | |
a38a00fd | 179 | close_transaction(t, card, status); |
3038e353 KH |
180 | break; |
181 | } | |
182 | } | |
183 | ||
53dca511 | 184 | static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
b9549bc6 | 185 | int destination_id, int source_id, int generation, int speed, |
36bfe49d | 186 | unsigned long long offset, void *payload, size_t length) |
3038e353 KH |
187 | { |
188 | int ext_tcode; | |
189 | ||
18e9b10f SR |
190 | if (tcode == TCODE_STREAM_DATA) { |
191 | packet->header[0] = | |
192 | HEADER_DATA_LENGTH(length) | | |
193 | destination_id | | |
194 | HEADER_TCODE(TCODE_STREAM_DATA); | |
195 | packet->header_length = 4; | |
196 | packet->payload = payload; | |
197 | packet->payload_length = length; | |
198 | ||
199 | goto common; | |
200 | } | |
201 | ||
3038e353 | 202 | if (tcode > 0x10) { |
8f9f963e | 203 | ext_tcode = tcode & ~0x10; |
3038e353 KH |
204 | tcode = TCODE_LOCK_REQUEST; |
205 | } else | |
206 | ext_tcode = 0; | |
207 | ||
208 | packet->header[0] = | |
a77754a7 KH |
209 | HEADER_RETRY(RETRY_X) | |
210 | HEADER_TLABEL(tlabel) | | |
211 | HEADER_TCODE(tcode) | | |
b9549bc6 | 212 | HEADER_DESTINATION(destination_id); |
3038e353 | 213 | packet->header[1] = |
a77754a7 | 214 | HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
3038e353 KH |
215 | packet->header[2] = |
216 | offset; | |
217 | ||
218 | switch (tcode) { | |
219 | case TCODE_WRITE_QUADLET_REQUEST: | |
220 | packet->header[3] = *(u32 *)payload; | |
221 | packet->header_length = 16; | |
222 | packet->payload_length = 0; | |
223 | break; | |
224 | ||
225 | case TCODE_LOCK_REQUEST: | |
226 | case TCODE_WRITE_BLOCK_REQUEST: | |
227 | packet->header[3] = | |
a77754a7 KH |
228 | HEADER_DATA_LENGTH(length) | |
229 | HEADER_EXTENDED_TCODE(ext_tcode); | |
3038e353 KH |
230 | packet->header_length = 16; |
231 | packet->payload = payload; | |
232 | packet->payload_length = length; | |
233 | break; | |
234 | ||
235 | case TCODE_READ_QUADLET_REQUEST: | |
236 | packet->header_length = 12; | |
237 | packet->payload_length = 0; | |
238 | break; | |
239 | ||
240 | case TCODE_READ_BLOCK_REQUEST: | |
241 | packet->header[3] = | |
a77754a7 KH |
242 | HEADER_DATA_LENGTH(length) | |
243 | HEADER_EXTENDED_TCODE(ext_tcode); | |
3038e353 KH |
244 | packet->header_length = 16; |
245 | packet->payload_length = 0; | |
246 | break; | |
5b189bf3 SR |
247 | |
248 | default: | |
f9c70f91 | 249 | WARN(1, "wrong tcode %d", tcode); |
3038e353 | 250 | } |
18e9b10f | 251 | common: |
3038e353 KH |
252 | packet->speed = speed; |
253 | packet->generation = generation; | |
730c32f5 | 254 | packet->ack = 0; |
19593ffd | 255 | packet->payload_mapped = false; |
3038e353 KH |
256 | } |
257 | ||
7906054f CL |
258 | static int allocate_tlabel(struct fw_card *card) |
259 | { | |
260 | int tlabel; | |
261 | ||
262 | tlabel = card->current_tlabel; | |
263 | while (card->tlabel_mask & (1ULL << tlabel)) { | |
264 | tlabel = (tlabel + 1) & 0x3f; | |
265 | if (tlabel == card->current_tlabel) | |
266 | return -EBUSY; | |
267 | } | |
268 | ||
269 | card->current_tlabel = (tlabel + 1) & 0x3f; | |
270 | card->tlabel_mask |= 1ULL << tlabel; | |
271 | ||
272 | return tlabel; | |
273 | } | |
274 | ||
3038e353 | 275 | /** |
656b7afd SR |
276 | * fw_send_request() - submit a request packet for transmission |
277 | * @card: interface to send the request at | |
278 | * @t: transaction instance to which the request belongs | |
279 | * @tcode: transaction code | |
280 | * @destination_id: destination node ID, consisting of bus_ID and phy_ID | |
281 | * @generation: bus generation in which request and response are valid | |
282 | * @speed: transmission speed | |
283 | * @offset: 48bit wide offset into destination's address space | |
284 | * @payload: data payload for the request subaction | |
285 | * @length: length of the payload, in bytes | |
286 | * @callback: function to be called when the transaction is completed | |
287 | * @callback_data: data to be passed to the transaction completion callback | |
3038e353 | 288 | * |
656b7afd SR |
289 | * Submit a request packet into the asynchronous request transmission queue. |
290 | * Can be called from atomic context. If you prefer a blocking API, use | |
291 | * fw_run_transaction() in a context that can sleep. | |
3038e353 | 292 | * |
656b7afd SR |
293 | * In case of lock requests, specify one of the firewire-core specific %TCODE_ |
294 | * constants instead of %TCODE_LOCK_REQUEST in @tcode. | |
3038e353 | 295 | * |
656b7afd SR |
296 | * Make sure that the value in @destination_id is not older than the one in |
297 | * @generation. Otherwise the request is in danger to be sent to a wrong node. | |
3038e353 | 298 | * |
656b7afd | 299 | * In case of asynchronous stream packets i.e. %TCODE_STREAM_DATA, the caller |
18e9b10f | 300 | * needs to synthesize @destination_id with fw_stream_packet_destination_id(). |
656b7afd SR |
301 | * It will contain tag, channel, and sy data instead of a node ID then. |
302 | * | |
303 | * The payload buffer at @data is going to be DMA-mapped except in case of | |
304 | * quadlet-sized payload or of local (loopback) requests. Hence make sure that | |
305 | * the buffer complies with the restrictions for DMA-mapped memory. The | |
306 | * @payload must not be freed before the @callback is called. | |
307 | * | |
308 | * In case of request types without payload, @data is NULL and @length is 0. | |
309 | * | |
310 | * After the transaction is completed successfully or unsuccessfully, the | |
311 | * @callback will be called. Among its parameters is the response code which | |
312 | * is either one of the rcodes per IEEE 1394 or, in case of internal errors, | |
313 | * the firewire-core specific %RCODE_SEND_ERROR. | |
314 | * | |
315 | * Note some timing corner cases: fw_send_request() may complete much earlier | |
316 | * than when the request packet actually hits the wire. On the other hand, | |
317 | * transaction completion and hence execution of @callback may happen even | |
318 | * before fw_send_request() returns. | |
3038e353 | 319 | */ |
53dca511 SR |
320 | void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, |
321 | int destination_id, int generation, int speed, | |
322 | unsigned long long offset, void *payload, size_t length, | |
323 | fw_transaction_callback_t callback, void *callback_data) | |
3038e353 KH |
324 | { |
325 | unsigned long flags; | |
b9549bc6 | 326 | int tlabel; |
3038e353 | 327 | |
c781c06d KH |
328 | /* |
329 | * Allocate tlabel from the bitmap and put the transaction on | |
330 | * the list while holding the card spinlock. | |
331 | */ | |
3038e353 KH |
332 | |
333 | spin_lock_irqsave(&card->lock, flags); | |
334 | ||
7906054f CL |
335 | tlabel = allocate_tlabel(card); |
336 | if (tlabel < 0) { | |
3038e353 KH |
337 | spin_unlock_irqrestore(&card->lock, flags); |
338 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); | |
339 | return; | |
340 | } | |
341 | ||
1e119fa9 | 342 | t->node_id = destination_id; |
3038e353 | 343 | t->tlabel = tlabel; |
5c40cbfe CL |
344 | t->card = card; |
345 | setup_timer(&t->split_timeout_timer, | |
346 | split_transaction_timeout_callback, (unsigned long)t); | |
347 | /* FIXME: start this timer later, relative to t->timestamp */ | |
8e4b50f9 CL |
348 | mod_timer(&t->split_timeout_timer, |
349 | jiffies + card->split_timeout_jiffies); | |
3038e353 KH |
350 | t->callback = callback; |
351 | t->callback_data = callback_data; | |
352 | ||
1e119fa9 JF |
353 | fw_fill_request(&t->packet, tcode, t->tlabel, |
354 | destination_id, card->node_id, generation, | |
355 | speed, offset, payload, length); | |
3038e353 KH |
356 | t->packet.callback = transmit_complete_callback; |
357 | ||
e9aeb46c SR |
358 | list_add_tail(&t->link, &card->transaction_list); |
359 | ||
360 | spin_unlock_irqrestore(&card->lock, flags); | |
361 | ||
3038e353 KH |
362 | card->driver->send_request(card, &t->packet); |
363 | } | |
364 | EXPORT_SYMBOL(fw_send_request); | |
365 | ||
1e119fa9 JF |
366 | struct transaction_callback_data { |
367 | struct completion done; | |
368 | void *payload; | |
369 | int rcode; | |
370 | }; | |
371 | ||
372 | static void transaction_callback(struct fw_card *card, int rcode, | |
373 | void *payload, size_t length, void *data) | |
374 | { | |
375 | struct transaction_callback_data *d = data; | |
376 | ||
377 | if (rcode == RCODE_COMPLETE) | |
378 | memcpy(d->payload, payload, length); | |
379 | d->rcode = rcode; | |
380 | complete(&d->done); | |
381 | } | |
382 | ||
383 | /** | |
656b7afd | 384 | * fw_run_transaction() - send request and sleep until transaction is completed |
1e119fa9 | 385 | * |
656b7afd SR |
386 | * Returns the RCODE. See fw_send_request() for parameter documentation. |
387 | * Unlike fw_send_request(), @data points to the payload of the request or/and | |
388 | * to the payload of the response. | |
1e119fa9 JF |
389 | */ |
390 | int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
53dca511 | 391 | int generation, int speed, unsigned long long offset, |
ba27e1f7 | 392 | void *payload, size_t length) |
1e119fa9 JF |
393 | { |
394 | struct transaction_callback_data d; | |
395 | struct fw_transaction t; | |
396 | ||
5c40cbfe | 397 | init_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 | 398 | init_completion(&d.done); |
ba27e1f7 | 399 | d.payload = payload; |
1e119fa9 | 400 | fw_send_request(card, &t, tcode, destination_id, generation, speed, |
ba27e1f7 | 401 | offset, payload, length, transaction_callback, &d); |
1e119fa9 | 402 | wait_for_completion(&d.done); |
5c40cbfe | 403 | destroy_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 JF |
404 | |
405 | return d.rcode; | |
406 | } | |
407 | EXPORT_SYMBOL(fw_run_transaction); | |
408 | ||
c0220d68 SR |
409 | static DEFINE_MUTEX(phy_config_mutex); |
410 | static DECLARE_COMPLETION(phy_config_done); | |
ae1e5355 SR |
411 | |
412 | static void transmit_phy_packet_callback(struct fw_packet *packet, | |
413 | struct fw_card *card, int status) | |
3038e353 | 414 | { |
c0220d68 | 415 | complete(&phy_config_done); |
3038e353 KH |
416 | } |
417 | ||
c0220d68 SR |
418 | static struct fw_packet phy_config_packet = { |
419 | .header_length = 8, | |
420 | .payload_length = 0, | |
421 | .speed = SCODE_100, | |
422 | .callback = transmit_phy_packet_callback, | |
423 | }; | |
424 | ||
83db801c KH |
425 | void fw_send_phy_config(struct fw_card *card, |
426 | int node_id, int generation, int gap_count) | |
3038e353 | 427 | { |
ae1e5355 | 428 | long timeout = DIV_ROUND_UP(HZ, 10); |
02d37bed SR |
429 | u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); |
430 | ||
431 | if (node_id != FW_PHY_CONFIG_NO_NODE_ID) | |
432 | data |= PHY_CONFIG_ROOT_ID(node_id); | |
433 | ||
434 | if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { | |
435 | gap_count = card->driver->read_phy_reg(card, 1); | |
436 | if (gap_count < 0) | |
437 | return; | |
438 | ||
439 | gap_count &= 63; | |
440 | if (gap_count == 63) | |
441 | return; | |
442 | } | |
443 | data |= PHY_CONFIG_GAP_COUNT(gap_count); | |
2a0a2590 | 444 | |
c0220d68 SR |
445 | mutex_lock(&phy_config_mutex); |
446 | ||
447 | phy_config_packet.header[0] = data; | |
448 | phy_config_packet.header[1] = ~data; | |
449 | phy_config_packet.generation = generation; | |
450 | INIT_COMPLETION(phy_config_done); | |
451 | ||
452 | card->driver->send_request(card, &phy_config_packet); | |
453 | wait_for_completion_timeout(&phy_config_done, timeout); | |
ae1e5355 | 454 | |
c0220d68 | 455 | mutex_unlock(&phy_config_mutex); |
3038e353 KH |
456 | } |
457 | ||
53dca511 SR |
458 | static struct fw_address_handler *lookup_overlapping_address_handler( |
459 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
460 | { |
461 | struct fw_address_handler *handler; | |
462 | ||
463 | list_for_each_entry(handler, list, link) { | |
464 | if (handler->offset < offset + length && | |
465 | offset < handler->offset + handler->length) | |
466 | return handler; | |
467 | } | |
468 | ||
469 | return NULL; | |
470 | } | |
471 | ||
db5d247a CL |
472 | static bool is_enclosing_handler(struct fw_address_handler *handler, |
473 | unsigned long long offset, size_t length) | |
474 | { | |
475 | return handler->offset <= offset && | |
476 | offset + length <= handler->offset + handler->length; | |
477 | } | |
478 | ||
53dca511 SR |
479 | static struct fw_address_handler *lookup_enclosing_address_handler( |
480 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
481 | { |
482 | struct fw_address_handler *handler; | |
483 | ||
484 | list_for_each_entry(handler, list, link) { | |
db5d247a | 485 | if (is_enclosing_handler(handler, offset, length)) |
3038e353 KH |
486 | return handler; |
487 | } | |
488 | ||
489 | return NULL; | |
490 | } | |
491 | ||
492 | static DEFINE_SPINLOCK(address_handler_lock); | |
493 | static LIST_HEAD(address_handler_list); | |
494 | ||
21ebcd12 | 495 | const struct fw_address_region fw_high_memory_region = |
5af4e5ea | 496 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
db8be076 AB |
497 | EXPORT_SYMBOL(fw_high_memory_region); |
498 | ||
499 | #if 0 | |
500 | const struct fw_address_region fw_low_memory_region = | |
501 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; | |
21ebcd12 | 502 | const struct fw_address_region fw_private_region = |
5af4e5ea | 503 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
21ebcd12 | 504 | const struct fw_address_region fw_csr_region = |
cca60977 JW |
505 | { .start = CSR_REGISTER_BASE, |
506 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; | |
21ebcd12 | 507 | const struct fw_address_region fw_unit_space_region = |
5af4e5ea | 508 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
db8be076 | 509 | #endif /* 0 */ |
3038e353 | 510 | |
db5d247a CL |
511 | static bool is_in_fcp_region(u64 offset, size_t length) |
512 | { | |
513 | return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
514 | offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); | |
515 | } | |
516 | ||
3038e353 | 517 | /** |
656b7afd SR |
518 | * fw_core_add_address_handler() - register for incoming requests |
519 | * @handler: callback | |
520 | * @region: region in the IEEE 1212 node space address range | |
3e0b5f0d SR |
521 | * |
522 | * region->start, ->end, and handler->length have to be quadlet-aligned. | |
523 | * | |
524 | * When a request is received that falls within the specified address range, | |
525 | * the specified callback is invoked. The parameters passed to the callback | |
526 | * give the details of the particular request. | |
1415d918 SR |
527 | * |
528 | * Return value: 0 on success, non-zero otherwise. | |
db5d247a | 529 | * |
1415d918 SR |
530 | * The start offset of the handler's address region is determined by |
531 | * fw_core_add_address_handler() and is returned in handler->offset. | |
db5d247a CL |
532 | * |
533 | * Address allocations are exclusive, except for the FCP registers. | |
3038e353 | 534 | */ |
53dca511 SR |
535 | int fw_core_add_address_handler(struct fw_address_handler *handler, |
536 | const struct fw_address_region *region) | |
3038e353 KH |
537 | { |
538 | struct fw_address_handler *other; | |
539 | unsigned long flags; | |
540 | int ret = -EBUSY; | |
541 | ||
3e0b5f0d SR |
542 | if (region->start & 0xffff000000000003ULL || |
543 | region->end & 0xffff000000000003ULL || | |
544 | region->start >= region->end || | |
545 | handler->length & 3 || | |
546 | handler->length == 0) | |
547 | return -EINVAL; | |
548 | ||
3038e353 KH |
549 | spin_lock_irqsave(&address_handler_lock, flags); |
550 | ||
3e0b5f0d | 551 | handler->offset = region->start; |
3038e353 | 552 | while (handler->offset + handler->length <= region->end) { |
db5d247a CL |
553 | if (is_in_fcp_region(handler->offset, handler->length)) |
554 | other = NULL; | |
555 | else | |
556 | other = lookup_overlapping_address_handler | |
557 | (&address_handler_list, | |
558 | handler->offset, handler->length); | |
3038e353 | 559 | if (other != NULL) { |
3e0b5f0d | 560 | handler->offset += other->length; |
3038e353 KH |
561 | } else { |
562 | list_add_tail(&handler->link, &address_handler_list); | |
563 | ret = 0; | |
564 | break; | |
565 | } | |
566 | } | |
567 | ||
568 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
569 | ||
570 | return ret; | |
571 | } | |
3038e353 KH |
572 | EXPORT_SYMBOL(fw_core_add_address_handler); |
573 | ||
574 | /** | |
656b7afd | 575 | * fw_core_remove_address_handler() - unregister an address handler |
3038e353 | 576 | */ |
3038e353 KH |
577 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
578 | { | |
579 | unsigned long flags; | |
580 | ||
581 | spin_lock_irqsave(&address_handler_lock, flags); | |
582 | list_del(&handler->link); | |
583 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
584 | } | |
3038e353 KH |
585 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
586 | ||
587 | struct fw_request { | |
588 | struct fw_packet response; | |
36bfe49d | 589 | u32 request_header[4]; |
3038e353 KH |
590 | int ack; |
591 | u32 length; | |
592 | u32 data[0]; | |
593 | }; | |
594 | ||
53dca511 SR |
595 | static void free_response_callback(struct fw_packet *packet, |
596 | struct fw_card *card, int status) | |
3038e353 KH |
597 | { |
598 | struct fw_request *request; | |
599 | ||
600 | request = container_of(packet, struct fw_request, response); | |
601 | kfree(request); | |
602 | } | |
603 | ||
a10c0ce7 CL |
604 | int fw_get_response_length(struct fw_request *r) |
605 | { | |
606 | int tcode, ext_tcode, data_length; | |
607 | ||
608 | tcode = HEADER_GET_TCODE(r->request_header[0]); | |
609 | ||
610 | switch (tcode) { | |
611 | case TCODE_WRITE_QUADLET_REQUEST: | |
612 | case TCODE_WRITE_BLOCK_REQUEST: | |
613 | return 0; | |
614 | ||
615 | case TCODE_READ_QUADLET_REQUEST: | |
616 | return 4; | |
617 | ||
618 | case TCODE_READ_BLOCK_REQUEST: | |
619 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
620 | return data_length; | |
621 | ||
622 | case TCODE_LOCK_REQUEST: | |
623 | ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); | |
624 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
625 | switch (ext_tcode) { | |
626 | case EXTCODE_FETCH_ADD: | |
627 | case EXTCODE_LITTLE_ADD: | |
628 | return data_length; | |
629 | default: | |
630 | return data_length / 2; | |
631 | } | |
632 | ||
633 | default: | |
f9c70f91 | 634 | WARN(1, "wrong tcode %d", tcode); |
a10c0ce7 CL |
635 | return 0; |
636 | } | |
637 | } | |
638 | ||
53dca511 SR |
639 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
640 | int rcode, void *payload, size_t length) | |
3038e353 KH |
641 | { |
642 | int tcode, tlabel, extended_tcode, source, destination; | |
643 | ||
a77754a7 KH |
644 | tcode = HEADER_GET_TCODE(request_header[0]); |
645 | tlabel = HEADER_GET_TLABEL(request_header[0]); | |
646 | source = HEADER_GET_DESTINATION(request_header[0]); | |
647 | destination = HEADER_GET_SOURCE(request_header[1]); | |
648 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); | |
3038e353 KH |
649 | |
650 | response->header[0] = | |
a77754a7 KH |
651 | HEADER_RETRY(RETRY_1) | |
652 | HEADER_TLABEL(tlabel) | | |
653 | HEADER_DESTINATION(destination); | |
36bfe49d | 654 | response->header[1] = |
a77754a7 KH |
655 | HEADER_SOURCE(source) | |
656 | HEADER_RCODE(rcode); | |
3038e353 KH |
657 | response->header[2] = 0; |
658 | ||
659 | switch (tcode) { | |
660 | case TCODE_WRITE_QUADLET_REQUEST: | |
661 | case TCODE_WRITE_BLOCK_REQUEST: | |
a77754a7 | 662 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
3038e353 KH |
663 | response->header_length = 12; |
664 | response->payload_length = 0; | |
665 | break; | |
666 | ||
667 | case TCODE_READ_QUADLET_REQUEST: | |
668 | response->header[0] |= | |
a77754a7 | 669 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
93c4cceb KH |
670 | if (payload != NULL) |
671 | response->header[3] = *(u32 *)payload; | |
672 | else | |
673 | response->header[3] = 0; | |
3038e353 KH |
674 | response->header_length = 16; |
675 | response->payload_length = 0; | |
676 | break; | |
677 | ||
678 | case TCODE_READ_BLOCK_REQUEST: | |
679 | case TCODE_LOCK_REQUEST: | |
a77754a7 | 680 | response->header[0] |= HEADER_TCODE(tcode + 2); |
3038e353 | 681 | response->header[3] = |
a77754a7 KH |
682 | HEADER_DATA_LENGTH(length) | |
683 | HEADER_EXTENDED_TCODE(extended_tcode); | |
3038e353 | 684 | response->header_length = 16; |
36bfe49d KH |
685 | response->payload = payload; |
686 | response->payload_length = length; | |
3038e353 KH |
687 | break; |
688 | ||
689 | default: | |
f9c70f91 | 690 | WARN(1, "wrong tcode %d", tcode); |
3038e353 | 691 | } |
1d1dc5e8 | 692 | |
19593ffd | 693 | response->payload_mapped = false; |
3038e353 | 694 | } |
93c4cceb | 695 | EXPORT_SYMBOL(fw_fill_response); |
3038e353 | 696 | |
8e4b50f9 CL |
697 | static u32 compute_split_timeout_timestamp(struct fw_card *card, |
698 | u32 request_timestamp) | |
699 | { | |
700 | unsigned int cycles; | |
701 | u32 timestamp; | |
702 | ||
703 | cycles = card->split_timeout_cycles; | |
704 | cycles += request_timestamp & 0x1fff; | |
705 | ||
706 | timestamp = request_timestamp & ~0x1fff; | |
707 | timestamp += (cycles / 8000) << 13; | |
708 | timestamp |= cycles % 8000; | |
709 | ||
710 | return timestamp; | |
711 | } | |
712 | ||
713 | static struct fw_request *allocate_request(struct fw_card *card, | |
714 | struct fw_packet *p) | |
3038e353 KH |
715 | { |
716 | struct fw_request *request; | |
717 | u32 *data, length; | |
8e4b50f9 | 718 | int request_tcode; |
3038e353 | 719 | |
a77754a7 | 720 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
3038e353 KH |
721 | switch (request_tcode) { |
722 | case TCODE_WRITE_QUADLET_REQUEST: | |
2639a6fb | 723 | data = &p->header[3]; |
3038e353 KH |
724 | length = 4; |
725 | break; | |
726 | ||
727 | case TCODE_WRITE_BLOCK_REQUEST: | |
728 | case TCODE_LOCK_REQUEST: | |
2639a6fb | 729 | data = p->payload; |
a77754a7 | 730 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
731 | break; |
732 | ||
733 | case TCODE_READ_QUADLET_REQUEST: | |
734 | data = NULL; | |
735 | length = 4; | |
736 | break; | |
737 | ||
738 | case TCODE_READ_BLOCK_REQUEST: | |
739 | data = NULL; | |
a77754a7 | 740 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
741 | break; |
742 | ||
743 | default: | |
0bf607c5 SR |
744 | fw_error("ERROR - corrupt request received - %08x %08x %08x\n", |
745 | p->header[0], p->header[1], p->header[2]); | |
3038e353 KH |
746 | return NULL; |
747 | } | |
748 | ||
2d826cc5 | 749 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
3038e353 KH |
750 | if (request == NULL) |
751 | return NULL; | |
752 | ||
2639a6fb | 753 | request->response.speed = p->speed; |
8e4b50f9 CL |
754 | request->response.timestamp = |
755 | compute_split_timeout_timestamp(card, p->timestamp); | |
2639a6fb | 756 | request->response.generation = p->generation; |
730c32f5 | 757 | request->response.ack = 0; |
3038e353 | 758 | request->response.callback = free_response_callback; |
2639a6fb | 759 | request->ack = p->ack; |
93c4cceb | 760 | request->length = length; |
3038e353 | 761 | if (data) |
6e2e8424 | 762 | memcpy(request->data, data, length); |
3038e353 | 763 | |
2d826cc5 | 764 | memcpy(request->request_header, p->header, sizeof(p->header)); |
3038e353 KH |
765 | |
766 | return request; | |
767 | } | |
768 | ||
53dca511 SR |
769 | void fw_send_response(struct fw_card *card, |
770 | struct fw_request *request, int rcode) | |
3038e353 | 771 | { |
db5d247a CL |
772 | if (WARN_ONCE(!request, "invalid for FCP address handlers")) |
773 | return; | |
774 | ||
a7ea6782 SR |
775 | /* unified transaction or broadcast transaction: don't respond */ |
776 | if (request->ack != ACK_PENDING || | |
777 | HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { | |
9c9bdf4d | 778 | kfree(request); |
3038e353 | 779 | return; |
9c9bdf4d | 780 | } |
3038e353 | 781 | |
36bfe49d KH |
782 | if (rcode == RCODE_COMPLETE) |
783 | fw_fill_response(&request->response, request->request_header, | |
a10c0ce7 CL |
784 | rcode, request->data, |
785 | fw_get_response_length(request)); | |
36bfe49d KH |
786 | else |
787 | fw_fill_response(&request->response, request->request_header, | |
788 | rcode, NULL, 0); | |
3038e353 KH |
789 | |
790 | card->driver->send_response(card, &request->response); | |
791 | } | |
3038e353 KH |
792 | EXPORT_SYMBOL(fw_send_response); |
793 | ||
db5d247a CL |
794 | static void handle_exclusive_region_request(struct fw_card *card, |
795 | struct fw_packet *p, | |
796 | struct fw_request *request, | |
797 | unsigned long long offset) | |
3038e353 KH |
798 | { |
799 | struct fw_address_handler *handler; | |
3038e353 | 800 | unsigned long flags; |
2639a6fb | 801 | int tcode, destination, source; |
3038e353 | 802 | |
a77754a7 | 803 | destination = HEADER_GET_DESTINATION(p->header[0]); |
478b233e | 804 | source = HEADER_GET_SOURCE(p->header[1]); |
c82f91f2 JF |
805 | tcode = HEADER_GET_TCODE(p->header[0]); |
806 | if (tcode == TCODE_LOCK_REQUEST) | |
807 | tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]); | |
3038e353 KH |
808 | |
809 | spin_lock_irqsave(&address_handler_lock, flags); | |
810 | handler = lookup_enclosing_address_handler(&address_handler_list, | |
811 | offset, request->length); | |
812 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
813 | ||
c781c06d KH |
814 | /* |
815 | * FIXME: lookup the fw_node corresponding to the sender of | |
3038e353 KH |
816 | * this request and pass that to the address handler instead |
817 | * of the node ID. We may also want to move the address | |
818 | * allocations to fw_node so we only do this callback if the | |
c781c06d KH |
819 | * upper layers registered it for this node. |
820 | */ | |
3038e353 KH |
821 | |
822 | if (handler == NULL) | |
823 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
824 | else | |
825 | handler->address_callback(card, request, | |
826 | tcode, destination, source, | |
33e553fe | 827 | p->generation, offset, |
3038e353 KH |
828 | request->data, request->length, |
829 | handler->callback_data); | |
830 | } | |
db5d247a CL |
831 | |
832 | static void handle_fcp_region_request(struct fw_card *card, | |
833 | struct fw_packet *p, | |
834 | struct fw_request *request, | |
835 | unsigned long long offset) | |
836 | { | |
837 | struct fw_address_handler *handler; | |
838 | unsigned long flags; | |
839 | int tcode, destination, source; | |
840 | ||
841 | if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
842 | offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || | |
843 | request->length > 0x200) { | |
844 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
845 | ||
846 | return; | |
847 | } | |
848 | ||
849 | tcode = HEADER_GET_TCODE(p->header[0]); | |
850 | destination = HEADER_GET_DESTINATION(p->header[0]); | |
851 | source = HEADER_GET_SOURCE(p->header[1]); | |
852 | ||
853 | if (tcode != TCODE_WRITE_QUADLET_REQUEST && | |
854 | tcode != TCODE_WRITE_BLOCK_REQUEST) { | |
855 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
856 | ||
857 | return; | |
858 | } | |
859 | ||
860 | spin_lock_irqsave(&address_handler_lock, flags); | |
861 | list_for_each_entry(handler, &address_handler_list, link) { | |
862 | if (is_enclosing_handler(handler, offset, request->length)) | |
863 | handler->address_callback(card, NULL, tcode, | |
864 | destination, source, | |
33e553fe SR |
865 | p->generation, offset, |
866 | request->data, | |
db5d247a CL |
867 | request->length, |
868 | handler->callback_data); | |
869 | } | |
870 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
871 | ||
872 | fw_send_response(card, request, RCODE_COMPLETE); | |
873 | } | |
874 | ||
875 | void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) | |
876 | { | |
877 | struct fw_request *request; | |
878 | unsigned long long offset; | |
879 | ||
880 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) | |
881 | return; | |
882 | ||
8e4b50f9 | 883 | request = allocate_request(card, p); |
db5d247a CL |
884 | if (request == NULL) { |
885 | /* FIXME: send statically allocated busy packet. */ | |
886 | return; | |
887 | } | |
888 | ||
889 | offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | | |
890 | p->header[2]; | |
891 | ||
892 | if (!is_in_fcp_region(offset, request->length)) | |
893 | handle_exclusive_region_request(card, p, request, offset); | |
894 | else | |
895 | handle_fcp_region_request(card, p, request, offset); | |
896 | ||
897 | } | |
3038e353 KH |
898 | EXPORT_SYMBOL(fw_core_handle_request); |
899 | ||
53dca511 | 900 | void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
3038e353 KH |
901 | { |
902 | struct fw_transaction *t; | |
903 | unsigned long flags; | |
904 | u32 *data; | |
905 | size_t data_length; | |
ae86e81e | 906 | int tcode, tlabel, source, rcode; |
3038e353 | 907 | |
ae86e81e SR |
908 | tcode = HEADER_GET_TCODE(p->header[0]); |
909 | tlabel = HEADER_GET_TLABEL(p->header[0]); | |
910 | source = HEADER_GET_SOURCE(p->header[1]); | |
911 | rcode = HEADER_GET_RCODE(p->header[1]); | |
3038e353 KH |
912 | |
913 | spin_lock_irqsave(&card->lock, flags); | |
914 | list_for_each_entry(t, &card->transaction_list, link) { | |
915 | if (t->node_id == source && t->tlabel == tlabel) { | |
5c40cbfe | 916 | list_del_init(&t->link); |
753a8970 | 917 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
3038e353 KH |
918 | break; |
919 | } | |
920 | } | |
921 | spin_unlock_irqrestore(&card->lock, flags); | |
922 | ||
923 | if (&t->link == &card->transaction_list) { | |
32b46093 KH |
924 | fw_notify("Unsolicited response (source %x, tlabel %x)\n", |
925 | source, tlabel); | |
3038e353 KH |
926 | return; |
927 | } | |
928 | ||
c781c06d KH |
929 | /* |
930 | * FIXME: sanity check packet, is length correct, does tcodes | |
931 | * and addresses match. | |
932 | */ | |
3038e353 KH |
933 | |
934 | switch (tcode) { | |
935 | case TCODE_READ_QUADLET_RESPONSE: | |
2639a6fb | 936 | data = (u32 *) &p->header[3]; |
3038e353 KH |
937 | data_length = 4; |
938 | break; | |
939 | ||
940 | case TCODE_WRITE_RESPONSE: | |
941 | data = NULL; | |
942 | data_length = 0; | |
943 | break; | |
944 | ||
945 | case TCODE_READ_BLOCK_RESPONSE: | |
946 | case TCODE_LOCK_RESPONSE: | |
93c4cceb | 947 | data = p->payload; |
a77754a7 | 948 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
949 | break; |
950 | ||
951 | default: | |
952 | /* Should never happen, this is just to shut up gcc. */ | |
953 | data = NULL; | |
954 | data_length = 0; | |
955 | break; | |
956 | } | |
957 | ||
5c40cbfe CL |
958 | del_timer_sync(&t->split_timeout_timer); |
959 | ||
10a4c735 SR |
960 | /* |
961 | * The response handler may be executed while the request handler | |
962 | * is still pending. Cancel the request handler. | |
963 | */ | |
964 | card->driver->cancel_packet(card, &t->packet); | |
965 | ||
3038e353 KH |
966 | t->callback(card, rcode, data, data_length, t->callback_data); |
967 | } | |
3038e353 KH |
968 | EXPORT_SYMBOL(fw_core_handle_response); |
969 | ||
ae57988f | 970 | static const struct fw_address_region topology_map_region = |
cca60977 JW |
971 | { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, |
972 | .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; | |
473d28c7 | 973 | |
53dca511 SR |
974 | static void handle_topology_map(struct fw_card *card, struct fw_request *request, |
975 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
976 | unsigned long long offset, void *payload, size_t length, |
977 | void *callback_data) | |
473d28c7 | 978 | { |
cb7c96da | 979 | int start; |
473d28c7 KH |
980 | |
981 | if (!TCODE_IS_READ_REQUEST(tcode)) { | |
982 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
983 | return; | |
984 | } | |
985 | ||
986 | if ((offset & 3) > 0 || (length & 3) > 0) { | |
987 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
988 | return; | |
989 | } | |
990 | ||
991 | start = (offset - topology_map_region.start) / 4; | |
cb7c96da | 992 | memcpy(payload, &card->topology_map[start], length); |
473d28c7 KH |
993 | |
994 | fw_send_response(card, request, RCODE_COMPLETE); | |
995 | } | |
996 | ||
997 | static struct fw_address_handler topology_map = { | |
85cb9b68 | 998 | .length = 0x400, |
473d28c7 KH |
999 | .address_callback = handle_topology_map, |
1000 | }; | |
1001 | ||
ae57988f | 1002 | static const struct fw_address_region registers_region = |
cca60977 JW |
1003 | { .start = CSR_REGISTER_BASE, |
1004 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; | |
d60d7f1d | 1005 | |
8e4b50f9 CL |
1006 | static void update_split_timeout(struct fw_card *card) |
1007 | { | |
1008 | unsigned int cycles; | |
1009 | ||
1010 | cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19); | |
1011 | ||
1012 | cycles = max(cycles, 800u); /* minimum as per the spec */ | |
1013 | cycles = min(cycles, 3u * 8000u); /* maximum OHCI timeout */ | |
1014 | ||
1015 | card->split_timeout_cycles = cycles; | |
1016 | card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000); | |
1017 | } | |
1018 | ||
53dca511 SR |
1019 | static void handle_registers(struct fw_card *card, struct fw_request *request, |
1020 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
1021 | unsigned long long offset, void *payload, size_t length, |
1022 | void *callback_data) | |
d60d7f1d | 1023 | { |
15f0d833 | 1024 | int reg = offset & ~CSR_REGISTER_BASE; |
d60d7f1d | 1025 | __be32 *data = payload; |
e534fe16 | 1026 | int rcode = RCODE_COMPLETE; |
8e4b50f9 | 1027 | unsigned long flags; |
d60d7f1d KH |
1028 | |
1029 | switch (reg) { | |
b384cf18 SR |
1030 | case CSR_PRIORITY_BUDGET: |
1031 | if (!card->priority_budget_implemented) { | |
1032 | rcode = RCODE_ADDRESS_ERROR; | |
1033 | break; | |
1034 | } | |
1035 | /* else fall through */ | |
3e07ec0e | 1036 | |
506f1a31 | 1037 | case CSR_NODE_IDS: |
65b2742a SR |
1038 | /* |
1039 | * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8 | |
1040 | * and 9.6, but interoperable with IEEE 1394.1-2004 bridges | |
1041 | */ | |
b384cf18 SR |
1042 | /* fall through */ |
1043 | ||
1044 | case CSR_STATE_CLEAR: | |
1045 | case CSR_STATE_SET: | |
1046 | case CSR_CYCLE_TIME: | |
1047 | case CSR_BUS_TIME: | |
1048 | case CSR_BUSY_TIMEOUT: | |
506f1a31 | 1049 | if (tcode == TCODE_READ_QUADLET_REQUEST) |
0fcff4e3 | 1050 | *data = cpu_to_be32(card->driver->read_csr(card, reg)); |
506f1a31 | 1051 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e3 | 1052 | card->driver->write_csr(card, reg, be32_to_cpu(*data)); |
506f1a31 CL |
1053 | else |
1054 | rcode = RCODE_TYPE_ERROR; | |
1055 | break; | |
1056 | ||
446eba0d | 1057 | case CSR_RESET_START: |
7e0e314f | 1058 | if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e3 SR |
1059 | card->driver->write_csr(card, CSR_STATE_CLEAR, |
1060 | CSR_STATE_BIT_ABDICATE); | |
7e0e314f | 1061 | else |
446eba0d CL |
1062 | rcode = RCODE_TYPE_ERROR; |
1063 | break; | |
1064 | ||
8e4b50f9 CL |
1065 | case CSR_SPLIT_TIMEOUT_HI: |
1066 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1067 | *data = cpu_to_be32(card->split_timeout_hi); | |
1068 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1069 | spin_lock_irqsave(&card->lock, flags); | |
1070 | card->split_timeout_hi = be32_to_cpu(*data) & 7; | |
1071 | update_split_timeout(card); | |
1072 | spin_unlock_irqrestore(&card->lock, flags); | |
1073 | } else { | |
1074 | rcode = RCODE_TYPE_ERROR; | |
1075 | } | |
1076 | break; | |
1077 | ||
1078 | case CSR_SPLIT_TIMEOUT_LO: | |
1079 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1080 | *data = cpu_to_be32(card->split_timeout_lo); | |
1081 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1082 | spin_lock_irqsave(&card->lock, flags); | |
1083 | card->split_timeout_lo = | |
1084 | be32_to_cpu(*data) & 0xfff80000; | |
1085 | update_split_timeout(card); | |
1086 | spin_unlock_irqrestore(&card->lock, flags); | |
1087 | } else { | |
1088 | rcode = RCODE_TYPE_ERROR; | |
1089 | } | |
1090 | break; | |
1091 | ||
3d1f46eb CL |
1092 | case CSR_MAINT_UTILITY: |
1093 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1094 | *data = card->maint_utility_register; | |
1095 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1096 | card->maint_utility_register = *data; | |
1097 | else | |
1098 | rcode = RCODE_TYPE_ERROR; | |
1099 | break; | |
1100 | ||
e534fe16 SR |
1101 | case CSR_BROADCAST_CHANNEL: |
1102 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1103 | *data = cpu_to_be32(card->broadcast_channel); | |
1104 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1105 | card->broadcast_channel = | |
1106 | (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | | |
1107 | BROADCAST_CHANNEL_INITIAL; | |
1108 | else | |
1109 | rcode = RCODE_TYPE_ERROR; | |
d60d7f1d KH |
1110 | break; |
1111 | ||
1112 | case CSR_BUS_MANAGER_ID: | |
1113 | case CSR_BANDWIDTH_AVAILABLE: | |
1114 | case CSR_CHANNELS_AVAILABLE_HI: | |
1115 | case CSR_CHANNELS_AVAILABLE_LO: | |
c781c06d KH |
1116 | /* |
1117 | * FIXME: these are handled by the OHCI hardware and | |
d60d7f1d KH |
1118 | * the stack never sees these request. If we add |
1119 | * support for a new type of controller that doesn't | |
1120 | * handle this in hardware we need to deal with these | |
c781c06d KH |
1121 | * transactions. |
1122 | */ | |
d60d7f1d KH |
1123 | BUG(); |
1124 | break; | |
1125 | ||
d60d7f1d | 1126 | default: |
e534fe16 | 1127 | rcode = RCODE_ADDRESS_ERROR; |
d60d7f1d KH |
1128 | break; |
1129 | } | |
e534fe16 SR |
1130 | |
1131 | fw_send_response(card, request, rcode); | |
d60d7f1d KH |
1132 | } |
1133 | ||
1134 | static struct fw_address_handler registers = { | |
1135 | .length = 0x400, | |
1136 | .address_callback = handle_registers, | |
1137 | }; | |
1138 | ||
3038e353 KH |
1139 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1140 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); | |
1141 | MODULE_LICENSE("GPL"); | |
1142 | ||
937f6879 | 1143 | static const u32 vendor_textual_descriptor[] = { |
3038e353 | 1144 | /* textual descriptor leaf () */ |
937f6879 | 1145 | 0x00060000, |
3038e353 KH |
1146 | 0x00000000, |
1147 | 0x00000000, | |
1148 | 0x4c696e75, /* L i n u */ | |
1149 | 0x78204669, /* x F i */ | |
1150 | 0x72657769, /* r e w i */ | |
937f6879 | 1151 | 0x72650000, /* r e */ |
3038e353 KH |
1152 | }; |
1153 | ||
937f6879 KH |
1154 | static const u32 model_textual_descriptor[] = { |
1155 | /* model descriptor leaf () */ | |
1156 | 0x00030000, | |
1157 | 0x00000000, | |
1158 | 0x00000000, | |
1159 | 0x4a756a75, /* J u j u */ | |
1160 | }; | |
1161 | ||
1162 | static struct fw_descriptor vendor_id_descriptor = { | |
1163 | .length = ARRAY_SIZE(vendor_textual_descriptor), | |
1164 | .immediate = 0x03d00d1e, | |
3038e353 | 1165 | .key = 0x81000000, |
937f6879 KH |
1166 | .data = vendor_textual_descriptor, |
1167 | }; | |
1168 | ||
1169 | static struct fw_descriptor model_id_descriptor = { | |
1170 | .length = ARRAY_SIZE(model_textual_descriptor), | |
1171 | .immediate = 0x17000001, | |
1172 | .key = 0x81000000, | |
1173 | .data = model_textual_descriptor, | |
3038e353 KH |
1174 | }; |
1175 | ||
3038e353 KH |
1176 | static int __init fw_core_init(void) |
1177 | { | |
2dbd7d7e | 1178 | int ret; |
3038e353 | 1179 | |
2dbd7d7e SR |
1180 | ret = bus_register(&fw_bus_type); |
1181 | if (ret < 0) | |
1182 | return ret; | |
3038e353 | 1183 | |
a3aca3da KH |
1184 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
1185 | if (fw_cdev_major < 0) { | |
1186 | bus_unregister(&fw_bus_type); | |
1187 | return fw_cdev_major; | |
1188 | } | |
1189 | ||
c490a6de SR |
1190 | fw_core_add_address_handler(&topology_map, &topology_map_region); |
1191 | fw_core_add_address_handler(®isters, ®isters_region); | |
1192 | fw_core_add_descriptor(&vendor_id_descriptor); | |
1193 | fw_core_add_descriptor(&model_id_descriptor); | |
3038e353 KH |
1194 | |
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | static void __exit fw_core_cleanup(void) | |
1199 | { | |
a3aca3da | 1200 | unregister_chrdev(fw_cdev_major, "firewire"); |
3038e353 | 1201 | bus_unregister(&fw_bus_type); |
d6053e08 | 1202 | idr_destroy(&fw_device_idr); |
3038e353 KH |
1203 | } |
1204 | ||
1205 | module_init(fw_core_init); | |
1206 | module_exit(fw_core_cleanup); |