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, | |
18d0cdfd SR |
313 | * the firewire-core specific %RCODE_SEND_ERROR. The other firewire-core |
314 | * specific rcodes (%RCODE_CANCELLED, %RCODE_BUSY, %RCODE_GENERATION, | |
315 | * %RCODE_NO_ACK) denote transaction timeout, busy responder, stale request | |
316 | * generation, or missing ACK respectively. | |
656b7afd SR |
317 | * |
318 | * Note some timing corner cases: fw_send_request() may complete much earlier | |
319 | * than when the request packet actually hits the wire. On the other hand, | |
320 | * transaction completion and hence execution of @callback may happen even | |
321 | * before fw_send_request() returns. | |
3038e353 | 322 | */ |
53dca511 SR |
323 | void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, |
324 | int destination_id, int generation, int speed, | |
325 | unsigned long long offset, void *payload, size_t length, | |
326 | fw_transaction_callback_t callback, void *callback_data) | |
3038e353 KH |
327 | { |
328 | unsigned long flags; | |
b9549bc6 | 329 | int tlabel; |
3038e353 | 330 | |
c781c06d KH |
331 | /* |
332 | * Allocate tlabel from the bitmap and put the transaction on | |
333 | * the list while holding the card spinlock. | |
334 | */ | |
3038e353 KH |
335 | |
336 | spin_lock_irqsave(&card->lock, flags); | |
337 | ||
7906054f CL |
338 | tlabel = allocate_tlabel(card); |
339 | if (tlabel < 0) { | |
3038e353 KH |
340 | spin_unlock_irqrestore(&card->lock, flags); |
341 | callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); | |
342 | return; | |
343 | } | |
344 | ||
1e119fa9 | 345 | t->node_id = destination_id; |
3038e353 | 346 | t->tlabel = tlabel; |
5c40cbfe CL |
347 | t->card = card; |
348 | setup_timer(&t->split_timeout_timer, | |
349 | split_transaction_timeout_callback, (unsigned long)t); | |
350 | /* FIXME: start this timer later, relative to t->timestamp */ | |
8e4b50f9 CL |
351 | mod_timer(&t->split_timeout_timer, |
352 | jiffies + card->split_timeout_jiffies); | |
3038e353 KH |
353 | t->callback = callback; |
354 | t->callback_data = callback_data; | |
355 | ||
1e119fa9 JF |
356 | fw_fill_request(&t->packet, tcode, t->tlabel, |
357 | destination_id, card->node_id, generation, | |
358 | speed, offset, payload, length); | |
3038e353 KH |
359 | t->packet.callback = transmit_complete_callback; |
360 | ||
e9aeb46c SR |
361 | list_add_tail(&t->link, &card->transaction_list); |
362 | ||
363 | spin_unlock_irqrestore(&card->lock, flags); | |
364 | ||
3038e353 KH |
365 | card->driver->send_request(card, &t->packet); |
366 | } | |
367 | EXPORT_SYMBOL(fw_send_request); | |
368 | ||
1e119fa9 JF |
369 | struct transaction_callback_data { |
370 | struct completion done; | |
371 | void *payload; | |
372 | int rcode; | |
373 | }; | |
374 | ||
375 | static void transaction_callback(struct fw_card *card, int rcode, | |
376 | void *payload, size_t length, void *data) | |
377 | { | |
378 | struct transaction_callback_data *d = data; | |
379 | ||
380 | if (rcode == RCODE_COMPLETE) | |
381 | memcpy(d->payload, payload, length); | |
382 | d->rcode = rcode; | |
383 | complete(&d->done); | |
384 | } | |
385 | ||
386 | /** | |
656b7afd | 387 | * fw_run_transaction() - send request and sleep until transaction is completed |
1e119fa9 | 388 | * |
656b7afd SR |
389 | * Returns the RCODE. See fw_send_request() for parameter documentation. |
390 | * Unlike fw_send_request(), @data points to the payload of the request or/and | |
391 | * to the payload of the response. | |
1e119fa9 JF |
392 | */ |
393 | int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, | |
53dca511 | 394 | int generation, int speed, unsigned long long offset, |
ba27e1f7 | 395 | void *payload, size_t length) |
1e119fa9 JF |
396 | { |
397 | struct transaction_callback_data d; | |
398 | struct fw_transaction t; | |
399 | ||
5c40cbfe | 400 | init_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 | 401 | init_completion(&d.done); |
ba27e1f7 | 402 | d.payload = payload; |
1e119fa9 | 403 | fw_send_request(card, &t, tcode, destination_id, generation, speed, |
ba27e1f7 | 404 | offset, payload, length, transaction_callback, &d); |
1e119fa9 | 405 | wait_for_completion(&d.done); |
5c40cbfe | 406 | destroy_timer_on_stack(&t.split_timeout_timer); |
1e119fa9 JF |
407 | |
408 | return d.rcode; | |
409 | } | |
410 | EXPORT_SYMBOL(fw_run_transaction); | |
411 | ||
c0220d68 SR |
412 | static DEFINE_MUTEX(phy_config_mutex); |
413 | static DECLARE_COMPLETION(phy_config_done); | |
ae1e5355 SR |
414 | |
415 | static void transmit_phy_packet_callback(struct fw_packet *packet, | |
416 | struct fw_card *card, int status) | |
3038e353 | 417 | { |
c0220d68 | 418 | complete(&phy_config_done); |
3038e353 KH |
419 | } |
420 | ||
c0220d68 SR |
421 | static struct fw_packet phy_config_packet = { |
422 | .header_length = 8, | |
423 | .payload_length = 0, | |
424 | .speed = SCODE_100, | |
425 | .callback = transmit_phy_packet_callback, | |
426 | }; | |
427 | ||
83db801c KH |
428 | void fw_send_phy_config(struct fw_card *card, |
429 | int node_id, int generation, int gap_count) | |
3038e353 | 430 | { |
ae1e5355 | 431 | long timeout = DIV_ROUND_UP(HZ, 10); |
02d37bed SR |
432 | u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); |
433 | ||
434 | if (node_id != FW_PHY_CONFIG_NO_NODE_ID) | |
435 | data |= PHY_CONFIG_ROOT_ID(node_id); | |
436 | ||
437 | if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { | |
438 | gap_count = card->driver->read_phy_reg(card, 1); | |
439 | if (gap_count < 0) | |
440 | return; | |
441 | ||
442 | gap_count &= 63; | |
443 | if (gap_count == 63) | |
444 | return; | |
445 | } | |
446 | data |= PHY_CONFIG_GAP_COUNT(gap_count); | |
2a0a2590 | 447 | |
c0220d68 SR |
448 | mutex_lock(&phy_config_mutex); |
449 | ||
450 | phy_config_packet.header[0] = data; | |
451 | phy_config_packet.header[1] = ~data; | |
452 | phy_config_packet.generation = generation; | |
453 | INIT_COMPLETION(phy_config_done); | |
454 | ||
455 | card->driver->send_request(card, &phy_config_packet); | |
456 | wait_for_completion_timeout(&phy_config_done, timeout); | |
ae1e5355 | 457 | |
c0220d68 | 458 | mutex_unlock(&phy_config_mutex); |
3038e353 KH |
459 | } |
460 | ||
53dca511 SR |
461 | static struct fw_address_handler *lookup_overlapping_address_handler( |
462 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
463 | { |
464 | struct fw_address_handler *handler; | |
465 | ||
466 | list_for_each_entry(handler, list, link) { | |
467 | if (handler->offset < offset + length && | |
468 | offset < handler->offset + handler->length) | |
469 | return handler; | |
470 | } | |
471 | ||
472 | return NULL; | |
473 | } | |
474 | ||
db5d247a CL |
475 | static bool is_enclosing_handler(struct fw_address_handler *handler, |
476 | unsigned long long offset, size_t length) | |
477 | { | |
478 | return handler->offset <= offset && | |
479 | offset + length <= handler->offset + handler->length; | |
480 | } | |
481 | ||
53dca511 SR |
482 | static struct fw_address_handler *lookup_enclosing_address_handler( |
483 | struct list_head *list, unsigned long long offset, size_t length) | |
3038e353 KH |
484 | { |
485 | struct fw_address_handler *handler; | |
486 | ||
487 | list_for_each_entry(handler, list, link) { | |
db5d247a | 488 | if (is_enclosing_handler(handler, offset, length)) |
3038e353 KH |
489 | return handler; |
490 | } | |
491 | ||
492 | return NULL; | |
493 | } | |
494 | ||
495 | static DEFINE_SPINLOCK(address_handler_lock); | |
496 | static LIST_HEAD(address_handler_list); | |
497 | ||
21ebcd12 | 498 | const struct fw_address_region fw_high_memory_region = |
5af4e5ea | 499 | { .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
db8be076 AB |
500 | EXPORT_SYMBOL(fw_high_memory_region); |
501 | ||
502 | #if 0 | |
503 | const struct fw_address_region fw_low_memory_region = | |
504 | { .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; | |
21ebcd12 | 505 | const struct fw_address_region fw_private_region = |
5af4e5ea | 506 | { .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
21ebcd12 | 507 | const struct fw_address_region fw_csr_region = |
cca60977 JW |
508 | { .start = CSR_REGISTER_BASE, |
509 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; | |
21ebcd12 | 510 | const struct fw_address_region fw_unit_space_region = |
5af4e5ea | 511 | { .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
db8be076 | 512 | #endif /* 0 */ |
3038e353 | 513 | |
db5d247a CL |
514 | static bool is_in_fcp_region(u64 offset, size_t length) |
515 | { | |
516 | return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
517 | offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); | |
518 | } | |
519 | ||
3038e353 | 520 | /** |
656b7afd SR |
521 | * fw_core_add_address_handler() - register for incoming requests |
522 | * @handler: callback | |
523 | * @region: region in the IEEE 1212 node space address range | |
3e0b5f0d SR |
524 | * |
525 | * region->start, ->end, and handler->length have to be quadlet-aligned. | |
526 | * | |
527 | * When a request is received that falls within the specified address range, | |
528 | * the specified callback is invoked. The parameters passed to the callback | |
529 | * give the details of the particular request. | |
1415d918 SR |
530 | * |
531 | * Return value: 0 on success, non-zero otherwise. | |
db5d247a | 532 | * |
1415d918 SR |
533 | * The start offset of the handler's address region is determined by |
534 | * fw_core_add_address_handler() and is returned in handler->offset. | |
db5d247a CL |
535 | * |
536 | * Address allocations are exclusive, except for the FCP registers. | |
3038e353 | 537 | */ |
53dca511 SR |
538 | int fw_core_add_address_handler(struct fw_address_handler *handler, |
539 | const struct fw_address_region *region) | |
3038e353 KH |
540 | { |
541 | struct fw_address_handler *other; | |
542 | unsigned long flags; | |
543 | int ret = -EBUSY; | |
544 | ||
3e0b5f0d | 545 | if (region->start & 0xffff000000000003ULL || |
3e0b5f0d | 546 | region->start >= region->end || |
0c9ae701 | 547 | region->end > 0x0001000000000000ULL || |
3e0b5f0d SR |
548 | handler->length & 3 || |
549 | handler->length == 0) | |
550 | return -EINVAL; | |
551 | ||
3038e353 KH |
552 | spin_lock_irqsave(&address_handler_lock, flags); |
553 | ||
3e0b5f0d | 554 | handler->offset = region->start; |
3038e353 | 555 | while (handler->offset + handler->length <= region->end) { |
db5d247a CL |
556 | if (is_in_fcp_region(handler->offset, handler->length)) |
557 | other = NULL; | |
558 | else | |
559 | other = lookup_overlapping_address_handler | |
560 | (&address_handler_list, | |
561 | handler->offset, handler->length); | |
3038e353 | 562 | if (other != NULL) { |
3e0b5f0d | 563 | handler->offset += other->length; |
3038e353 KH |
564 | } else { |
565 | list_add_tail(&handler->link, &address_handler_list); | |
566 | ret = 0; | |
567 | break; | |
568 | } | |
569 | } | |
570 | ||
571 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
572 | ||
573 | return ret; | |
574 | } | |
3038e353 KH |
575 | EXPORT_SYMBOL(fw_core_add_address_handler); |
576 | ||
577 | /** | |
656b7afd | 578 | * fw_core_remove_address_handler() - unregister an address handler |
3038e353 | 579 | */ |
3038e353 KH |
580 | void fw_core_remove_address_handler(struct fw_address_handler *handler) |
581 | { | |
582 | unsigned long flags; | |
583 | ||
584 | spin_lock_irqsave(&address_handler_lock, flags); | |
585 | list_del(&handler->link); | |
586 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
587 | } | |
3038e353 KH |
588 | EXPORT_SYMBOL(fw_core_remove_address_handler); |
589 | ||
590 | struct fw_request { | |
591 | struct fw_packet response; | |
36bfe49d | 592 | u32 request_header[4]; |
3038e353 KH |
593 | int ack; |
594 | u32 length; | |
595 | u32 data[0]; | |
596 | }; | |
597 | ||
53dca511 SR |
598 | static void free_response_callback(struct fw_packet *packet, |
599 | struct fw_card *card, int status) | |
3038e353 KH |
600 | { |
601 | struct fw_request *request; | |
602 | ||
603 | request = container_of(packet, struct fw_request, response); | |
604 | kfree(request); | |
605 | } | |
606 | ||
a10c0ce7 CL |
607 | int fw_get_response_length(struct fw_request *r) |
608 | { | |
609 | int tcode, ext_tcode, data_length; | |
610 | ||
611 | tcode = HEADER_GET_TCODE(r->request_header[0]); | |
612 | ||
613 | switch (tcode) { | |
614 | case TCODE_WRITE_QUADLET_REQUEST: | |
615 | case TCODE_WRITE_BLOCK_REQUEST: | |
616 | return 0; | |
617 | ||
618 | case TCODE_READ_QUADLET_REQUEST: | |
619 | return 4; | |
620 | ||
621 | case TCODE_READ_BLOCK_REQUEST: | |
622 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
623 | return data_length; | |
624 | ||
625 | case TCODE_LOCK_REQUEST: | |
626 | ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); | |
627 | data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); | |
628 | switch (ext_tcode) { | |
629 | case EXTCODE_FETCH_ADD: | |
630 | case EXTCODE_LITTLE_ADD: | |
631 | return data_length; | |
632 | default: | |
633 | return data_length / 2; | |
634 | } | |
635 | ||
636 | default: | |
f9c70f91 | 637 | WARN(1, "wrong tcode %d", tcode); |
a10c0ce7 CL |
638 | return 0; |
639 | } | |
640 | } | |
641 | ||
53dca511 SR |
642 | void fw_fill_response(struct fw_packet *response, u32 *request_header, |
643 | int rcode, void *payload, size_t length) | |
3038e353 KH |
644 | { |
645 | int tcode, tlabel, extended_tcode, source, destination; | |
646 | ||
a77754a7 KH |
647 | tcode = HEADER_GET_TCODE(request_header[0]); |
648 | tlabel = HEADER_GET_TLABEL(request_header[0]); | |
649 | source = HEADER_GET_DESTINATION(request_header[0]); | |
650 | destination = HEADER_GET_SOURCE(request_header[1]); | |
651 | extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]); | |
3038e353 KH |
652 | |
653 | response->header[0] = | |
a77754a7 KH |
654 | HEADER_RETRY(RETRY_1) | |
655 | HEADER_TLABEL(tlabel) | | |
656 | HEADER_DESTINATION(destination); | |
36bfe49d | 657 | response->header[1] = |
a77754a7 KH |
658 | HEADER_SOURCE(source) | |
659 | HEADER_RCODE(rcode); | |
3038e353 KH |
660 | response->header[2] = 0; |
661 | ||
662 | switch (tcode) { | |
663 | case TCODE_WRITE_QUADLET_REQUEST: | |
664 | case TCODE_WRITE_BLOCK_REQUEST: | |
a77754a7 | 665 | response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
3038e353 KH |
666 | response->header_length = 12; |
667 | response->payload_length = 0; | |
668 | break; | |
669 | ||
670 | case TCODE_READ_QUADLET_REQUEST: | |
671 | response->header[0] |= | |
a77754a7 | 672 | HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
93c4cceb KH |
673 | if (payload != NULL) |
674 | response->header[3] = *(u32 *)payload; | |
675 | else | |
676 | response->header[3] = 0; | |
3038e353 KH |
677 | response->header_length = 16; |
678 | response->payload_length = 0; | |
679 | break; | |
680 | ||
681 | case TCODE_READ_BLOCK_REQUEST: | |
682 | case TCODE_LOCK_REQUEST: | |
a77754a7 | 683 | response->header[0] |= HEADER_TCODE(tcode + 2); |
3038e353 | 684 | response->header[3] = |
a77754a7 KH |
685 | HEADER_DATA_LENGTH(length) | |
686 | HEADER_EXTENDED_TCODE(extended_tcode); | |
3038e353 | 687 | response->header_length = 16; |
36bfe49d KH |
688 | response->payload = payload; |
689 | response->payload_length = length; | |
3038e353 KH |
690 | break; |
691 | ||
692 | default: | |
f9c70f91 | 693 | WARN(1, "wrong tcode %d", tcode); |
3038e353 | 694 | } |
1d1dc5e8 | 695 | |
19593ffd | 696 | response->payload_mapped = false; |
3038e353 | 697 | } |
93c4cceb | 698 | EXPORT_SYMBOL(fw_fill_response); |
3038e353 | 699 | |
8e4b50f9 CL |
700 | static u32 compute_split_timeout_timestamp(struct fw_card *card, |
701 | u32 request_timestamp) | |
702 | { | |
703 | unsigned int cycles; | |
704 | u32 timestamp; | |
705 | ||
706 | cycles = card->split_timeout_cycles; | |
707 | cycles += request_timestamp & 0x1fff; | |
708 | ||
709 | timestamp = request_timestamp & ~0x1fff; | |
710 | timestamp += (cycles / 8000) << 13; | |
711 | timestamp |= cycles % 8000; | |
712 | ||
713 | return timestamp; | |
714 | } | |
715 | ||
716 | static struct fw_request *allocate_request(struct fw_card *card, | |
717 | struct fw_packet *p) | |
3038e353 KH |
718 | { |
719 | struct fw_request *request; | |
720 | u32 *data, length; | |
8e4b50f9 | 721 | int request_tcode; |
3038e353 | 722 | |
a77754a7 | 723 | request_tcode = HEADER_GET_TCODE(p->header[0]); |
3038e353 KH |
724 | switch (request_tcode) { |
725 | case TCODE_WRITE_QUADLET_REQUEST: | |
2639a6fb | 726 | data = &p->header[3]; |
3038e353 KH |
727 | length = 4; |
728 | break; | |
729 | ||
730 | case TCODE_WRITE_BLOCK_REQUEST: | |
731 | case TCODE_LOCK_REQUEST: | |
2639a6fb | 732 | data = p->payload; |
a77754a7 | 733 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
734 | break; |
735 | ||
736 | case TCODE_READ_QUADLET_REQUEST: | |
737 | data = NULL; | |
738 | length = 4; | |
739 | break; | |
740 | ||
741 | case TCODE_READ_BLOCK_REQUEST: | |
742 | data = NULL; | |
a77754a7 | 743 | length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
744 | break; |
745 | ||
746 | default: | |
0bf607c5 SR |
747 | fw_error("ERROR - corrupt request received - %08x %08x %08x\n", |
748 | p->header[0], p->header[1], p->header[2]); | |
3038e353 KH |
749 | return NULL; |
750 | } | |
751 | ||
2d826cc5 | 752 | request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
3038e353 KH |
753 | if (request == NULL) |
754 | return NULL; | |
755 | ||
2639a6fb | 756 | request->response.speed = p->speed; |
8e4b50f9 CL |
757 | request->response.timestamp = |
758 | compute_split_timeout_timestamp(card, p->timestamp); | |
2639a6fb | 759 | request->response.generation = p->generation; |
730c32f5 | 760 | request->response.ack = 0; |
3038e353 | 761 | request->response.callback = free_response_callback; |
2639a6fb | 762 | request->ack = p->ack; |
93c4cceb | 763 | request->length = length; |
3038e353 | 764 | if (data) |
6e2e8424 | 765 | memcpy(request->data, data, length); |
3038e353 | 766 | |
2d826cc5 | 767 | memcpy(request->request_header, p->header, sizeof(p->header)); |
3038e353 KH |
768 | |
769 | return request; | |
770 | } | |
771 | ||
53dca511 SR |
772 | void fw_send_response(struct fw_card *card, |
773 | struct fw_request *request, int rcode) | |
3038e353 | 774 | { |
db5d247a CL |
775 | if (WARN_ONCE(!request, "invalid for FCP address handlers")) |
776 | return; | |
777 | ||
a7ea6782 SR |
778 | /* unified transaction or broadcast transaction: don't respond */ |
779 | if (request->ack != ACK_PENDING || | |
780 | HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { | |
9c9bdf4d | 781 | kfree(request); |
3038e353 | 782 | return; |
9c9bdf4d | 783 | } |
3038e353 | 784 | |
36bfe49d KH |
785 | if (rcode == RCODE_COMPLETE) |
786 | fw_fill_response(&request->response, request->request_header, | |
a10c0ce7 CL |
787 | rcode, request->data, |
788 | fw_get_response_length(request)); | |
36bfe49d KH |
789 | else |
790 | fw_fill_response(&request->response, request->request_header, | |
791 | rcode, NULL, 0); | |
3038e353 KH |
792 | |
793 | card->driver->send_response(card, &request->response); | |
794 | } | |
3038e353 KH |
795 | EXPORT_SYMBOL(fw_send_response); |
796 | ||
db5d247a CL |
797 | static void handle_exclusive_region_request(struct fw_card *card, |
798 | struct fw_packet *p, | |
799 | struct fw_request *request, | |
800 | unsigned long long offset) | |
3038e353 KH |
801 | { |
802 | struct fw_address_handler *handler; | |
3038e353 | 803 | unsigned long flags; |
2639a6fb | 804 | int tcode, destination, source; |
3038e353 | 805 | |
a77754a7 | 806 | destination = HEADER_GET_DESTINATION(p->header[0]); |
478b233e | 807 | source = HEADER_GET_SOURCE(p->header[1]); |
c82f91f2 JF |
808 | tcode = HEADER_GET_TCODE(p->header[0]); |
809 | if (tcode == TCODE_LOCK_REQUEST) | |
810 | tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]); | |
3038e353 KH |
811 | |
812 | spin_lock_irqsave(&address_handler_lock, flags); | |
813 | handler = lookup_enclosing_address_handler(&address_handler_list, | |
814 | offset, request->length); | |
815 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
816 | ||
c781c06d KH |
817 | /* |
818 | * FIXME: lookup the fw_node corresponding to the sender of | |
3038e353 KH |
819 | * this request and pass that to the address handler instead |
820 | * of the node ID. We may also want to move the address | |
821 | * allocations to fw_node so we only do this callback if the | |
c781c06d KH |
822 | * upper layers registered it for this node. |
823 | */ | |
3038e353 KH |
824 | |
825 | if (handler == NULL) | |
826 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
827 | else | |
828 | handler->address_callback(card, request, | |
829 | tcode, destination, source, | |
33e553fe | 830 | p->generation, offset, |
3038e353 KH |
831 | request->data, request->length, |
832 | handler->callback_data); | |
833 | } | |
db5d247a CL |
834 | |
835 | static void handle_fcp_region_request(struct fw_card *card, | |
836 | struct fw_packet *p, | |
837 | struct fw_request *request, | |
838 | unsigned long long offset) | |
839 | { | |
840 | struct fw_address_handler *handler; | |
841 | unsigned long flags; | |
842 | int tcode, destination, source; | |
843 | ||
844 | if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && | |
845 | offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || | |
846 | request->length > 0x200) { | |
847 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
848 | ||
849 | return; | |
850 | } | |
851 | ||
852 | tcode = HEADER_GET_TCODE(p->header[0]); | |
853 | destination = HEADER_GET_DESTINATION(p->header[0]); | |
854 | source = HEADER_GET_SOURCE(p->header[1]); | |
855 | ||
856 | if (tcode != TCODE_WRITE_QUADLET_REQUEST && | |
857 | tcode != TCODE_WRITE_BLOCK_REQUEST) { | |
858 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
859 | ||
860 | return; | |
861 | } | |
862 | ||
863 | spin_lock_irqsave(&address_handler_lock, flags); | |
864 | list_for_each_entry(handler, &address_handler_list, link) { | |
865 | if (is_enclosing_handler(handler, offset, request->length)) | |
866 | handler->address_callback(card, NULL, tcode, | |
867 | destination, source, | |
33e553fe SR |
868 | p->generation, offset, |
869 | request->data, | |
db5d247a CL |
870 | request->length, |
871 | handler->callback_data); | |
872 | } | |
873 | spin_unlock_irqrestore(&address_handler_lock, flags); | |
874 | ||
875 | fw_send_response(card, request, RCODE_COMPLETE); | |
876 | } | |
877 | ||
878 | void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) | |
879 | { | |
880 | struct fw_request *request; | |
881 | unsigned long long offset; | |
882 | ||
883 | if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) | |
884 | return; | |
885 | ||
bf54e146 SR |
886 | if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) { |
887 | fw_cdev_handle_phy_packet(card, p); | |
888 | return; | |
889 | } | |
890 | ||
8e4b50f9 | 891 | request = allocate_request(card, p); |
db5d247a CL |
892 | if (request == NULL) { |
893 | /* FIXME: send statically allocated busy packet. */ | |
894 | return; | |
895 | } | |
896 | ||
897 | offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | | |
898 | p->header[2]; | |
899 | ||
900 | if (!is_in_fcp_region(offset, request->length)) | |
901 | handle_exclusive_region_request(card, p, request, offset); | |
902 | else | |
903 | handle_fcp_region_request(card, p, request, offset); | |
904 | ||
905 | } | |
3038e353 KH |
906 | EXPORT_SYMBOL(fw_core_handle_request); |
907 | ||
53dca511 | 908 | void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
3038e353 KH |
909 | { |
910 | struct fw_transaction *t; | |
911 | unsigned long flags; | |
912 | u32 *data; | |
913 | size_t data_length; | |
ae86e81e | 914 | int tcode, tlabel, source, rcode; |
3038e353 | 915 | |
ae86e81e SR |
916 | tcode = HEADER_GET_TCODE(p->header[0]); |
917 | tlabel = HEADER_GET_TLABEL(p->header[0]); | |
918 | source = HEADER_GET_SOURCE(p->header[1]); | |
919 | rcode = HEADER_GET_RCODE(p->header[1]); | |
3038e353 KH |
920 | |
921 | spin_lock_irqsave(&card->lock, flags); | |
922 | list_for_each_entry(t, &card->transaction_list, link) { | |
923 | if (t->node_id == source && t->tlabel == tlabel) { | |
5c40cbfe | 924 | list_del_init(&t->link); |
753a8970 | 925 | card->tlabel_mask &= ~(1ULL << t->tlabel); |
3038e353 KH |
926 | break; |
927 | } | |
928 | } | |
929 | spin_unlock_irqrestore(&card->lock, flags); | |
930 | ||
931 | if (&t->link == &card->transaction_list) { | |
32b46093 KH |
932 | fw_notify("Unsolicited response (source %x, tlabel %x)\n", |
933 | source, tlabel); | |
3038e353 KH |
934 | return; |
935 | } | |
936 | ||
c781c06d KH |
937 | /* |
938 | * FIXME: sanity check packet, is length correct, does tcodes | |
939 | * and addresses match. | |
940 | */ | |
3038e353 KH |
941 | |
942 | switch (tcode) { | |
943 | case TCODE_READ_QUADLET_RESPONSE: | |
2639a6fb | 944 | data = (u32 *) &p->header[3]; |
3038e353 KH |
945 | data_length = 4; |
946 | break; | |
947 | ||
948 | case TCODE_WRITE_RESPONSE: | |
949 | data = NULL; | |
950 | data_length = 0; | |
951 | break; | |
952 | ||
953 | case TCODE_READ_BLOCK_RESPONSE: | |
954 | case TCODE_LOCK_RESPONSE: | |
93c4cceb | 955 | data = p->payload; |
a77754a7 | 956 | data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353 KH |
957 | break; |
958 | ||
959 | default: | |
960 | /* Should never happen, this is just to shut up gcc. */ | |
961 | data = NULL; | |
962 | data_length = 0; | |
963 | break; | |
964 | } | |
965 | ||
5c40cbfe CL |
966 | del_timer_sync(&t->split_timeout_timer); |
967 | ||
10a4c735 SR |
968 | /* |
969 | * The response handler may be executed while the request handler | |
970 | * is still pending. Cancel the request handler. | |
971 | */ | |
972 | card->driver->cancel_packet(card, &t->packet); | |
973 | ||
3038e353 KH |
974 | t->callback(card, rcode, data, data_length, t->callback_data); |
975 | } | |
3038e353 KH |
976 | EXPORT_SYMBOL(fw_core_handle_response); |
977 | ||
ae57988f | 978 | static const struct fw_address_region topology_map_region = |
cca60977 JW |
979 | { .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, |
980 | .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; | |
473d28c7 | 981 | |
53dca511 SR |
982 | static void handle_topology_map(struct fw_card *card, struct fw_request *request, |
983 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
984 | unsigned long long offset, void *payload, size_t length, |
985 | void *callback_data) | |
473d28c7 | 986 | { |
cb7c96da | 987 | int start; |
473d28c7 KH |
988 | |
989 | if (!TCODE_IS_READ_REQUEST(tcode)) { | |
990 | fw_send_response(card, request, RCODE_TYPE_ERROR); | |
991 | return; | |
992 | } | |
993 | ||
994 | if ((offset & 3) > 0 || (length & 3) > 0) { | |
995 | fw_send_response(card, request, RCODE_ADDRESS_ERROR); | |
996 | return; | |
997 | } | |
998 | ||
999 | start = (offset - topology_map_region.start) / 4; | |
cb7c96da | 1000 | memcpy(payload, &card->topology_map[start], length); |
473d28c7 KH |
1001 | |
1002 | fw_send_response(card, request, RCODE_COMPLETE); | |
1003 | } | |
1004 | ||
1005 | static struct fw_address_handler topology_map = { | |
85cb9b68 | 1006 | .length = 0x400, |
473d28c7 KH |
1007 | .address_callback = handle_topology_map, |
1008 | }; | |
1009 | ||
ae57988f | 1010 | static const struct fw_address_region registers_region = |
cca60977 JW |
1011 | { .start = CSR_REGISTER_BASE, |
1012 | .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; | |
d60d7f1d | 1013 | |
8e4b50f9 CL |
1014 | static void update_split_timeout(struct fw_card *card) |
1015 | { | |
1016 | unsigned int cycles; | |
1017 | ||
1018 | cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19); | |
1019 | ||
1020 | cycles = max(cycles, 800u); /* minimum as per the spec */ | |
1021 | cycles = min(cycles, 3u * 8000u); /* maximum OHCI timeout */ | |
1022 | ||
1023 | card->split_timeout_cycles = cycles; | |
1024 | card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000); | |
1025 | } | |
1026 | ||
53dca511 SR |
1027 | static void handle_registers(struct fw_card *card, struct fw_request *request, |
1028 | int tcode, int destination, int source, int generation, | |
33e553fe SR |
1029 | unsigned long long offset, void *payload, size_t length, |
1030 | void *callback_data) | |
d60d7f1d | 1031 | { |
15f0d833 | 1032 | int reg = offset & ~CSR_REGISTER_BASE; |
d60d7f1d | 1033 | __be32 *data = payload; |
e534fe16 | 1034 | int rcode = RCODE_COMPLETE; |
8e4b50f9 | 1035 | unsigned long flags; |
d60d7f1d KH |
1036 | |
1037 | switch (reg) { | |
b384cf18 SR |
1038 | case CSR_PRIORITY_BUDGET: |
1039 | if (!card->priority_budget_implemented) { | |
1040 | rcode = RCODE_ADDRESS_ERROR; | |
1041 | break; | |
1042 | } | |
1043 | /* else fall through */ | |
3e07ec0e | 1044 | |
506f1a31 | 1045 | case CSR_NODE_IDS: |
65b2742a SR |
1046 | /* |
1047 | * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8 | |
1048 | * and 9.6, but interoperable with IEEE 1394.1-2004 bridges | |
1049 | */ | |
b384cf18 SR |
1050 | /* fall through */ |
1051 | ||
1052 | case CSR_STATE_CLEAR: | |
1053 | case CSR_STATE_SET: | |
1054 | case CSR_CYCLE_TIME: | |
1055 | case CSR_BUS_TIME: | |
1056 | case CSR_BUSY_TIMEOUT: | |
506f1a31 | 1057 | if (tcode == TCODE_READ_QUADLET_REQUEST) |
0fcff4e3 | 1058 | *data = cpu_to_be32(card->driver->read_csr(card, reg)); |
506f1a31 | 1059 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e3 | 1060 | card->driver->write_csr(card, reg, be32_to_cpu(*data)); |
506f1a31 CL |
1061 | else |
1062 | rcode = RCODE_TYPE_ERROR; | |
1063 | break; | |
1064 | ||
446eba0d | 1065 | case CSR_RESET_START: |
7e0e314f | 1066 | if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e3 SR |
1067 | card->driver->write_csr(card, CSR_STATE_CLEAR, |
1068 | CSR_STATE_BIT_ABDICATE); | |
7e0e314f | 1069 | else |
446eba0d CL |
1070 | rcode = RCODE_TYPE_ERROR; |
1071 | break; | |
1072 | ||
8e4b50f9 CL |
1073 | case CSR_SPLIT_TIMEOUT_HI: |
1074 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1075 | *data = cpu_to_be32(card->split_timeout_hi); | |
1076 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1077 | spin_lock_irqsave(&card->lock, flags); | |
1078 | card->split_timeout_hi = be32_to_cpu(*data) & 7; | |
1079 | update_split_timeout(card); | |
1080 | spin_unlock_irqrestore(&card->lock, flags); | |
1081 | } else { | |
1082 | rcode = RCODE_TYPE_ERROR; | |
1083 | } | |
1084 | break; | |
1085 | ||
1086 | case CSR_SPLIT_TIMEOUT_LO: | |
1087 | if (tcode == TCODE_READ_QUADLET_REQUEST) { | |
1088 | *data = cpu_to_be32(card->split_timeout_lo); | |
1089 | } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { | |
1090 | spin_lock_irqsave(&card->lock, flags); | |
1091 | card->split_timeout_lo = | |
1092 | be32_to_cpu(*data) & 0xfff80000; | |
1093 | update_split_timeout(card); | |
1094 | spin_unlock_irqrestore(&card->lock, flags); | |
1095 | } else { | |
1096 | rcode = RCODE_TYPE_ERROR; | |
1097 | } | |
1098 | break; | |
1099 | ||
3d1f46eb CL |
1100 | case CSR_MAINT_UTILITY: |
1101 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1102 | *data = card->maint_utility_register; | |
1103 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1104 | card->maint_utility_register = *data; | |
1105 | else | |
1106 | rcode = RCODE_TYPE_ERROR; | |
1107 | break; | |
1108 | ||
e534fe16 SR |
1109 | case CSR_BROADCAST_CHANNEL: |
1110 | if (tcode == TCODE_READ_QUADLET_REQUEST) | |
1111 | *data = cpu_to_be32(card->broadcast_channel); | |
1112 | else if (tcode == TCODE_WRITE_QUADLET_REQUEST) | |
1113 | card->broadcast_channel = | |
1114 | (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | | |
1115 | BROADCAST_CHANNEL_INITIAL; | |
1116 | else | |
1117 | rcode = RCODE_TYPE_ERROR; | |
d60d7f1d KH |
1118 | break; |
1119 | ||
1120 | case CSR_BUS_MANAGER_ID: | |
1121 | case CSR_BANDWIDTH_AVAILABLE: | |
1122 | case CSR_CHANNELS_AVAILABLE_HI: | |
1123 | case CSR_CHANNELS_AVAILABLE_LO: | |
c781c06d KH |
1124 | /* |
1125 | * FIXME: these are handled by the OHCI hardware and | |
d60d7f1d KH |
1126 | * the stack never sees these request. If we add |
1127 | * support for a new type of controller that doesn't | |
1128 | * handle this in hardware we need to deal with these | |
c781c06d KH |
1129 | * transactions. |
1130 | */ | |
d60d7f1d KH |
1131 | BUG(); |
1132 | break; | |
1133 | ||
d60d7f1d | 1134 | default: |
e534fe16 | 1135 | rcode = RCODE_ADDRESS_ERROR; |
d60d7f1d KH |
1136 | break; |
1137 | } | |
e534fe16 SR |
1138 | |
1139 | fw_send_response(card, request, rcode); | |
d60d7f1d KH |
1140 | } |
1141 | ||
1142 | static struct fw_address_handler registers = { | |
1143 | .length = 0x400, | |
1144 | .address_callback = handle_registers, | |
1145 | }; | |
1146 | ||
3038e353 KH |
1147 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
1148 | MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); | |
1149 | MODULE_LICENSE("GPL"); | |
1150 | ||
937f6879 | 1151 | static const u32 vendor_textual_descriptor[] = { |
3038e353 | 1152 | /* textual descriptor leaf () */ |
937f6879 | 1153 | 0x00060000, |
3038e353 KH |
1154 | 0x00000000, |
1155 | 0x00000000, | |
1156 | 0x4c696e75, /* L i n u */ | |
1157 | 0x78204669, /* x F i */ | |
1158 | 0x72657769, /* r e w i */ | |
937f6879 | 1159 | 0x72650000, /* r e */ |
3038e353 KH |
1160 | }; |
1161 | ||
937f6879 KH |
1162 | static const u32 model_textual_descriptor[] = { |
1163 | /* model descriptor leaf () */ | |
1164 | 0x00030000, | |
1165 | 0x00000000, | |
1166 | 0x00000000, | |
1167 | 0x4a756a75, /* J u j u */ | |
1168 | }; | |
1169 | ||
1170 | static struct fw_descriptor vendor_id_descriptor = { | |
1171 | .length = ARRAY_SIZE(vendor_textual_descriptor), | |
1172 | .immediate = 0x03d00d1e, | |
3038e353 | 1173 | .key = 0x81000000, |
937f6879 KH |
1174 | .data = vendor_textual_descriptor, |
1175 | }; | |
1176 | ||
1177 | static struct fw_descriptor model_id_descriptor = { | |
1178 | .length = ARRAY_SIZE(model_textual_descriptor), | |
1179 | .immediate = 0x17000001, | |
1180 | .key = 0x81000000, | |
1181 | .data = model_textual_descriptor, | |
3038e353 KH |
1182 | }; |
1183 | ||
3038e353 KH |
1184 | static int __init fw_core_init(void) |
1185 | { | |
2dbd7d7e | 1186 | int ret; |
3038e353 | 1187 | |
2dbd7d7e SR |
1188 | ret = bus_register(&fw_bus_type); |
1189 | if (ret < 0) | |
1190 | return ret; | |
3038e353 | 1191 | |
a3aca3da KH |
1192 | fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); |
1193 | if (fw_cdev_major < 0) { | |
1194 | bus_unregister(&fw_bus_type); | |
1195 | return fw_cdev_major; | |
1196 | } | |
1197 | ||
c490a6de SR |
1198 | fw_core_add_address_handler(&topology_map, &topology_map_region); |
1199 | fw_core_add_address_handler(®isters, ®isters_region); | |
1200 | fw_core_add_descriptor(&vendor_id_descriptor); | |
1201 | fw_core_add_descriptor(&model_id_descriptor); | |
3038e353 KH |
1202 | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | static void __exit fw_core_cleanup(void) | |
1207 | { | |
a3aca3da | 1208 | unregister_chrdev(fw_cdev_major, "firewire"); |
3038e353 | 1209 | bus_unregister(&fw_bus_type); |
d6053e08 | 1210 | idr_destroy(&fw_device_idr); |
3038e353 KH |
1211 | } |
1212 | ||
1213 | module_init(fw_core_init); | |
1214 | module_exit(fw_core_cleanup); |