Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IEEE 1394 for Linux | |
3 | * | |
4 | * Transaction support. | |
5 | * | |
6 | * Copyright (C) 1999 Andreas E. Bombe | |
7 | * | |
8 | * This code is licensed under the GPL. See the file COPYING in the root | |
9 | * directory of the kernel sources for details. | |
10 | */ | |
11 | ||
1da177e4 | 12 | #include <linux/bitops.h> |
9951903e SR |
13 | #include <linux/spinlock.h> |
14 | #include <linux/wait.h> | |
1da177e4 | 15 | |
d83e7d8e | 16 | #include <asm/bug.h> |
1da177e4 LT |
17 | #include <asm/errno.h> |
18 | ||
19 | #include "ieee1394.h" | |
20 | #include "ieee1394_types.h" | |
21 | #include "hosts.h" | |
22 | #include "ieee1394_core.h" | |
e27d3014 | 23 | #include "ieee1394_transactions.h" |
1da177e4 | 24 | |
1da177e4 LT |
25 | #define PREP_ASYNC_HEAD_ADDRESS(tc) \ |
26 | packet->tcode = tc; \ | |
27 | packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \ | |
28 | | (1 << 8) | (tc << 4); \ | |
29 | packet->header[1] = (packet->host->node_id << 16) | (addr >> 32); \ | |
30 | packet->header[2] = addr & 0xffffffff | |
31 | ||
9951903e SR |
32 | #ifndef HPSB_DEBUG_TLABELS |
33 | static | |
34 | #endif | |
35 | spinlock_t hpsb_tlabel_lock = SPIN_LOCK_UNLOCKED; | |
36 | ||
37 | static DECLARE_WAIT_QUEUE_HEAD(tlabel_wq); | |
38 | ||
1da177e4 LT |
39 | static void fill_async_readquad(struct hpsb_packet *packet, u64 addr) |
40 | { | |
16c333a3 JMH |
41 | PREP_ASYNC_HEAD_ADDRESS(TCODE_READQ); |
42 | packet->header_size = 12; | |
43 | packet->data_size = 0; | |
44 | packet->expect_response = 1; | |
1da177e4 LT |
45 | } |
46 | ||
16c333a3 JMH |
47 | static void fill_async_readblock(struct hpsb_packet *packet, u64 addr, |
48 | int length) | |
1da177e4 | 49 | { |
16c333a3 JMH |
50 | PREP_ASYNC_HEAD_ADDRESS(TCODE_READB); |
51 | packet->header[3] = length << 16; | |
52 | packet->header_size = 16; | |
53 | packet->data_size = 0; | |
54 | packet->expect_response = 1; | |
1da177e4 LT |
55 | } |
56 | ||
16c333a3 JMH |
57 | static void fill_async_writequad(struct hpsb_packet *packet, u64 addr, |
58 | quadlet_t data) | |
1da177e4 | 59 | { |
16c333a3 JMH |
60 | PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEQ); |
61 | packet->header[3] = data; | |
62 | packet->header_size = 16; | |
63 | packet->data_size = 0; | |
64 | packet->expect_response = 1; | |
1da177e4 LT |
65 | } |
66 | ||
16c333a3 JMH |
67 | static void fill_async_writeblock(struct hpsb_packet *packet, u64 addr, |
68 | int length) | |
1da177e4 | 69 | { |
16c333a3 JMH |
70 | PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEB); |
71 | packet->header[3] = length << 16; | |
72 | packet->header_size = 16; | |
73 | packet->expect_response = 1; | |
74 | packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0); | |
1da177e4 LT |
75 | } |
76 | ||
77 | static void fill_async_lock(struct hpsb_packet *packet, u64 addr, int extcode, | |
16c333a3 | 78 | int length) |
1da177e4 | 79 | { |
16c333a3 JMH |
80 | PREP_ASYNC_HEAD_ADDRESS(TCODE_LOCK_REQUEST); |
81 | packet->header[3] = (length << 16) | extcode; | |
82 | packet->header_size = 16; | |
83 | packet->data_size = length; | |
84 | packet->expect_response = 1; | |
1da177e4 LT |
85 | } |
86 | ||
87 | static void fill_iso_packet(struct hpsb_packet *packet, int length, int channel, | |
16c333a3 | 88 | int tag, int sync) |
1da177e4 | 89 | { |
16c333a3 JMH |
90 | packet->header[0] = (length << 16) | (tag << 14) | (channel << 8) |
91 | | (TCODE_ISO_DATA << 4) | sync; | |
1da177e4 | 92 | |
16c333a3 JMH |
93 | packet->header_size = 4; |
94 | packet->data_size = length; | |
95 | packet->type = hpsb_iso; | |
96 | packet->tcode = TCODE_ISO_DATA; | |
1da177e4 LT |
97 | } |
98 | ||
99 | static void fill_phy_packet(struct hpsb_packet *packet, quadlet_t data) | |
100 | { | |
16c333a3 JMH |
101 | packet->header[0] = data; |
102 | packet->header[1] = ~data; | |
103 | packet->header_size = 8; | |
104 | packet->data_size = 0; | |
105 | packet->expect_response = 0; | |
106 | packet->type = hpsb_raw; /* No CRC added */ | |
107 | packet->speed_code = IEEE1394_SPEED_100; /* Force speed to be 100Mbps */ | |
1da177e4 LT |
108 | } |
109 | ||
110 | static void fill_async_stream_packet(struct hpsb_packet *packet, int length, | |
111 | int channel, int tag, int sync) | |
112 | { | |
113 | packet->header[0] = (length << 16) | (tag << 14) | (channel << 8) | |
16c333a3 | 114 | | (TCODE_STREAM_DATA << 4) | sync; |
1da177e4 LT |
115 | |
116 | packet->header_size = 4; | |
117 | packet->data_size = length; | |
118 | packet->type = hpsb_async; | |
119 | packet->tcode = TCODE_ISO_DATA; | |
120 | } | |
121 | ||
9951903e SR |
122 | /* same as hpsb_get_tlabel, except that it returns immediately */ |
123 | static int hpsb_get_tlabel_atomic(struct hpsb_packet *packet) | |
124 | { | |
125 | unsigned long flags, *tp; | |
126 | u8 *next; | |
127 | int tlabel, n = NODEID_TO_NODE(packet->node_id); | |
128 | ||
129 | /* Broadcast transactions are complete once the request has been sent. | |
130 | * Use the same transaction label for all broadcast transactions. */ | |
131 | if (unlikely(n == ALL_NODES)) { | |
132 | packet->tlabel = 0; | |
133 | return 0; | |
134 | } | |
135 | tp = packet->host->tl_pool[n].map; | |
136 | next = &packet->host->next_tl[n]; | |
137 | ||
138 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); | |
139 | tlabel = find_next_zero_bit(tp, 64, *next); | |
140 | if (tlabel > 63) | |
141 | tlabel = find_first_zero_bit(tp, 64); | |
142 | if (tlabel > 63) { | |
143 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
144 | return -EAGAIN; | |
145 | } | |
146 | __set_bit(tlabel, tp); | |
147 | *next = (tlabel + 1) & 63; | |
148 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
149 | ||
150 | packet->tlabel = tlabel; | |
151 | return 0; | |
152 | } | |
153 | ||
1da177e4 LT |
154 | /** |
155 | * hpsb_get_tlabel - allocate a transaction label | |
9951903e | 156 | * @packet: the packet whose tlabel and tl_pool we set |
1da177e4 LT |
157 | * |
158 | * Every asynchronous transaction on the 1394 bus needs a transaction | |
159 | * label to match the response to the request. This label has to be | |
160 | * different from any other transaction label in an outstanding request to | |
161 | * the same node to make matching possible without ambiguity. | |
162 | * | |
163 | * There are 64 different tlabels, so an allocated tlabel has to be freed | |
164 | * with hpsb_free_tlabel() after the transaction is complete (unless it's | |
165 | * reused again for the same target node). | |
166 | * | |
167 | * Return value: Zero on success, otherwise non-zero. A non-zero return | |
168 | * generally means there are no available tlabels. If this is called out | |
169 | * of interrupt or atomic context, then it will sleep until can return a | |
9951903e | 170 | * tlabel or a signal is received. |
1da177e4 LT |
171 | */ |
172 | int hpsb_get_tlabel(struct hpsb_packet *packet) | |
173 | { | |
9951903e SR |
174 | if (irqs_disabled() || in_atomic()) |
175 | return hpsb_get_tlabel_atomic(packet); | |
176 | ||
177 | /* NB: The macro wait_event_interruptible() is called with a condition | |
178 | * argument with side effect. This is only possible because the side | |
179 | * effect does not occur until the condition became true, and | |
180 | * wait_event_interruptible() won't evaluate the condition again after | |
181 | * that. */ | |
182 | return wait_event_interruptible(tlabel_wq, | |
183 | !hpsb_get_tlabel_atomic(packet)); | |
1da177e4 LT |
184 | } |
185 | ||
186 | /** | |
187 | * hpsb_free_tlabel - free an allocated transaction label | |
9951903e | 188 | * @packet: packet whose tlabel and tl_pool needs to be cleared |
1da177e4 LT |
189 | * |
190 | * Frees the transaction label allocated with hpsb_get_tlabel(). The | |
191 | * tlabel has to be freed after the transaction is complete (i.e. response | |
192 | * was received for a split transaction or packet was sent for a unified | |
193 | * transaction). | |
194 | * | |
195 | * A tlabel must not be freed twice. | |
196 | */ | |
197 | void hpsb_free_tlabel(struct hpsb_packet *packet) | |
198 | { | |
9951903e SR |
199 | unsigned long flags, *tp; |
200 | int tlabel, n = NODEID_TO_NODE(packet->node_id); | |
1da177e4 | 201 | |
eaf88450 BC |
202 | if (unlikely(n == ALL_NODES)) |
203 | return; | |
9951903e SR |
204 | tp = packet->host->tl_pool[n].map; |
205 | tlabel = packet->tlabel; | |
206 | BUG_ON(tlabel > 63 || tlabel < 0); | |
1da177e4 | 207 | |
9951903e SR |
208 | spin_lock_irqsave(&hpsb_tlabel_lock, flags); |
209 | BUG_ON(!__test_and_clear_bit(tlabel, tp)); | |
210 | spin_unlock_irqrestore(&hpsb_tlabel_lock, flags); | |
1da177e4 | 211 | |
9951903e | 212 | wake_up_interruptible(&tlabel_wq); |
1da177e4 LT |
213 | } |
214 | ||
1da177e4 LT |
215 | int hpsb_packet_success(struct hpsb_packet *packet) |
216 | { | |
16c333a3 JMH |
217 | switch (packet->ack_code) { |
218 | case ACK_PENDING: | |
219 | switch ((packet->header[1] >> 12) & 0xf) { | |
220 | case RCODE_COMPLETE: | |
221 | return 0; | |
222 | case RCODE_CONFLICT_ERROR: | |
223 | return -EAGAIN; | |
224 | case RCODE_DATA_ERROR: | |
225 | return -EREMOTEIO; | |
226 | case RCODE_TYPE_ERROR: | |
227 | return -EACCES; | |
228 | case RCODE_ADDRESS_ERROR: | |
229 | return -EINVAL; | |
230 | default: | |
231 | HPSB_ERR("received reserved rcode %d from node %d", | |
232 | (packet->header[1] >> 12) & 0xf, | |
233 | packet->node_id); | |
234 | return -EAGAIN; | |
235 | } | |
d83e7d8e | 236 | BUG(); |
16c333a3 JMH |
237 | |
238 | case ACK_BUSY_X: | |
239 | case ACK_BUSY_A: | |
240 | case ACK_BUSY_B: | |
241 | return -EBUSY; | |
242 | ||
243 | case ACK_TYPE_ERROR: | |
244 | return -EACCES; | |
245 | ||
246 | case ACK_COMPLETE: | |
247 | if (packet->tcode == TCODE_WRITEQ | |
248 | || packet->tcode == TCODE_WRITEB) { | |
249 | return 0; | |
250 | } else { | |
251 | HPSB_ERR("impossible ack_complete from node %d " | |
252 | "(tcode %d)", packet->node_id, packet->tcode); | |
253 | return -EAGAIN; | |
254 | } | |
255 | ||
256 | case ACK_DATA_ERROR: | |
257 | if (packet->tcode == TCODE_WRITEB | |
258 | || packet->tcode == TCODE_LOCK_REQUEST) { | |
259 | return -EAGAIN; | |
260 | } else { | |
261 | HPSB_ERR("impossible ack_data_error from node %d " | |
262 | "(tcode %d)", packet->node_id, packet->tcode); | |
263 | return -EAGAIN; | |
264 | } | |
265 | ||
266 | case ACK_ADDRESS_ERROR: | |
267 | return -EINVAL; | |
268 | ||
269 | case ACK_TARDY: | |
270 | case ACK_CONFLICT_ERROR: | |
271 | case ACKX_NONE: | |
272 | case ACKX_SEND_ERROR: | |
273 | case ACKX_ABORTED: | |
274 | case ACKX_TIMEOUT: | |
275 | /* error while sending */ | |
276 | return -EAGAIN; | |
277 | ||
278 | default: | |
279 | HPSB_ERR("got invalid ack %d from node %d (tcode %d)", | |
280 | packet->ack_code, packet->node_id, packet->tcode); | |
281 | return -EAGAIN; | |
282 | } | |
d83e7d8e | 283 | BUG(); |
1da177e4 LT |
284 | } |
285 | ||
286 | struct hpsb_packet *hpsb_make_readpacket(struct hpsb_host *host, nodeid_t node, | |
287 | u64 addr, size_t length) | |
288 | { | |
16c333a3 | 289 | struct hpsb_packet *packet; |
1da177e4 LT |
290 | |
291 | if (length == 0) | |
292 | return NULL; | |
293 | ||
294 | packet = hpsb_alloc_packet(length); | |
295 | if (!packet) | |
296 | return NULL; | |
297 | ||
298 | packet->host = host; | |
299 | packet->node_id = node; | |
300 | ||
301 | if (hpsb_get_tlabel(packet)) { | |
302 | hpsb_free_packet(packet); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | if (length == 4) | |
307 | fill_async_readquad(packet, addr); | |
308 | else | |
309 | fill_async_readblock(packet, addr, length); | |
310 | ||
311 | return packet; | |
312 | } | |
313 | ||
16c333a3 JMH |
314 | struct hpsb_packet *hpsb_make_writepacket(struct hpsb_host *host, nodeid_t node, |
315 | u64 addr, quadlet_t * buffer, | |
316 | size_t length) | |
1da177e4 LT |
317 | { |
318 | struct hpsb_packet *packet; | |
319 | ||
320 | if (length == 0) | |
321 | return NULL; | |
322 | ||
323 | packet = hpsb_alloc_packet(length); | |
324 | if (!packet) | |
325 | return NULL; | |
326 | ||
16c333a3 | 327 | if (length % 4) { /* zero padding bytes */ |
1da177e4 LT |
328 | packet->data[length >> 2] = 0; |
329 | } | |
330 | packet->host = host; | |
331 | packet->node_id = node; | |
332 | ||
333 | if (hpsb_get_tlabel(packet)) { | |
334 | hpsb_free_packet(packet); | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | if (length == 4) { | |
339 | fill_async_writequad(packet, addr, buffer ? *buffer : 0); | |
340 | } else { | |
341 | fill_async_writeblock(packet, addr, length); | |
342 | if (buffer) | |
343 | memcpy(packet->data, buffer, length); | |
344 | } | |
345 | ||
346 | return packet; | |
347 | } | |
348 | ||
16c333a3 JMH |
349 | struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 * buffer, |
350 | int length, int channel, int tag, | |
351 | int sync) | |
1da177e4 LT |
352 | { |
353 | struct hpsb_packet *packet; | |
354 | ||
355 | if (length == 0) | |
356 | return NULL; | |
357 | ||
358 | packet = hpsb_alloc_packet(length); | |
359 | if (!packet) | |
360 | return NULL; | |
361 | ||
16c333a3 | 362 | if (length % 4) { /* zero padding bytes */ |
1da177e4 LT |
363 | packet->data[length >> 2] = 0; |
364 | } | |
365 | packet->host = host; | |
366 | ||
367 | if (hpsb_get_tlabel(packet)) { | |
368 | hpsb_free_packet(packet); | |
369 | return NULL; | |
370 | } | |
371 | ||
372 | fill_async_stream_packet(packet, length, channel, tag, sync); | |
373 | if (buffer) | |
374 | memcpy(packet->data, buffer, length); | |
375 | ||
376 | return packet; | |
377 | } | |
378 | ||
379 | struct hpsb_packet *hpsb_make_lockpacket(struct hpsb_host *host, nodeid_t node, | |
16c333a3 JMH |
380 | u64 addr, int extcode, |
381 | quadlet_t * data, quadlet_t arg) | |
1da177e4 LT |
382 | { |
383 | struct hpsb_packet *p; | |
384 | u32 length; | |
385 | ||
386 | p = hpsb_alloc_packet(8); | |
16c333a3 JMH |
387 | if (!p) |
388 | return NULL; | |
1da177e4 LT |
389 | |
390 | p->host = host; | |
391 | p->node_id = node; | |
392 | if (hpsb_get_tlabel(p)) { | |
393 | hpsb_free_packet(p); | |
394 | return NULL; | |
395 | } | |
396 | ||
397 | switch (extcode) { | |
398 | case EXTCODE_FETCH_ADD: | |
399 | case EXTCODE_LITTLE_ADD: | |
400 | length = 4; | |
401 | if (data) | |
402 | p->data[0] = *data; | |
403 | break; | |
404 | default: | |
405 | length = 8; | |
406 | if (data) { | |
407 | p->data[0] = arg; | |
408 | p->data[1] = *data; | |
409 | } | |
410 | break; | |
411 | } | |
412 | fill_async_lock(p, addr, extcode, length); | |
413 | ||
414 | return p; | |
415 | } | |
416 | ||
16c333a3 JMH |
417 | struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host, |
418 | nodeid_t node, u64 addr, int extcode, | |
419 | octlet_t * data, octlet_t arg) | |
1da177e4 LT |
420 | { |
421 | struct hpsb_packet *p; | |
422 | u32 length; | |
423 | ||
424 | p = hpsb_alloc_packet(16); | |
16c333a3 JMH |
425 | if (!p) |
426 | return NULL; | |
1da177e4 LT |
427 | |
428 | p->host = host; | |
429 | p->node_id = node; | |
430 | if (hpsb_get_tlabel(p)) { | |
431 | hpsb_free_packet(p); | |
432 | return NULL; | |
433 | } | |
434 | ||
435 | switch (extcode) { | |
436 | case EXTCODE_FETCH_ADD: | |
437 | case EXTCODE_LITTLE_ADD: | |
438 | length = 8; | |
439 | if (data) { | |
440 | p->data[0] = *data >> 32; | |
441 | p->data[1] = *data & 0xffffffff; | |
442 | } | |
443 | break; | |
444 | default: | |
445 | length = 16; | |
446 | if (data) { | |
447 | p->data[0] = arg >> 32; | |
448 | p->data[1] = arg & 0xffffffff; | |
449 | p->data[2] = *data >> 32; | |
450 | p->data[3] = *data & 0xffffffff; | |
451 | } | |
452 | break; | |
453 | } | |
454 | fill_async_lock(p, addr, extcode, length); | |
455 | ||
456 | return p; | |
457 | } | |
458 | ||
16c333a3 | 459 | struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host, quadlet_t data) |
1da177e4 | 460 | { |
16c333a3 | 461 | struct hpsb_packet *p; |
1da177e4 | 462 | |
16c333a3 JMH |
463 | p = hpsb_alloc_packet(0); |
464 | if (!p) | |
465 | return NULL; | |
1da177e4 | 466 | |
16c333a3 JMH |
467 | p->host = host; |
468 | fill_phy_packet(p, data); | |
1da177e4 | 469 | |
16c333a3 | 470 | return p; |
1da177e4 LT |
471 | } |
472 | ||
473 | struct hpsb_packet *hpsb_make_isopacket(struct hpsb_host *host, | |
474 | int length, int channel, | |
475 | int tag, int sync) | |
476 | { | |
477 | struct hpsb_packet *p; | |
478 | ||
479 | p = hpsb_alloc_packet(length); | |
16c333a3 JMH |
480 | if (!p) |
481 | return NULL; | |
1da177e4 LT |
482 | |
483 | p->host = host; | |
484 | fill_iso_packet(p, length, channel, tag, sync); | |
485 | ||
486 | p->generation = get_hpsb_generation(host); | |
487 | ||
488 | return p; | |
489 | } | |
490 | ||
491 | /* | |
492 | * FIXME - these functions should probably read from / write to user space to | |
493 | * avoid in kernel buffers for user space callers | |
494 | */ | |
495 | ||
496 | int hpsb_read(struct hpsb_host *host, nodeid_t node, unsigned int generation, | |
16c333a3 | 497 | u64 addr, quadlet_t * buffer, size_t length) |
1da177e4 | 498 | { |
16c333a3 JMH |
499 | struct hpsb_packet *packet; |
500 | int retval = 0; | |
1da177e4 | 501 | |
16c333a3 JMH |
502 | if (length == 0) |
503 | return -EINVAL; | |
1da177e4 | 504 | |
16c333a3 | 505 | BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet |
1da177e4 LT |
506 | |
507 | packet = hpsb_make_readpacket(host, node, addr, length); | |
508 | ||
16c333a3 JMH |
509 | if (!packet) { |
510 | return -ENOMEM; | |
511 | } | |
1da177e4 LT |
512 | |
513 | packet->generation = generation; | |
16c333a3 | 514 | retval = hpsb_send_packet_and_wait(packet); |
1da177e4 LT |
515 | if (retval < 0) |
516 | goto hpsb_read_fail; | |
517 | ||
16c333a3 | 518 | retval = hpsb_packet_success(packet); |
1da177e4 | 519 | |
16c333a3 JMH |
520 | if (retval == 0) { |
521 | if (length == 4) { | |
522 | *buffer = packet->header[3]; | |
523 | } else { | |
524 | memcpy(buffer, packet->data, length); | |
525 | } | |
526 | } | |
1da177e4 | 527 | |
16c333a3 JMH |
528 | hpsb_read_fail: |
529 | hpsb_free_tlabel(packet); | |
530 | hpsb_free_packet(packet); | |
1da177e4 | 531 | |
16c333a3 | 532 | return retval; |
1da177e4 LT |
533 | } |
534 | ||
1da177e4 | 535 | int hpsb_write(struct hpsb_host *host, nodeid_t node, unsigned int generation, |
16c333a3 | 536 | u64 addr, quadlet_t * buffer, size_t length) |
1da177e4 LT |
537 | { |
538 | struct hpsb_packet *packet; | |
539 | int retval; | |
540 | ||
541 | if (length == 0) | |
542 | return -EINVAL; | |
543 | ||
16c333a3 | 544 | BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet |
1da177e4 | 545 | |
16c333a3 | 546 | packet = hpsb_make_writepacket(host, node, addr, buffer, length); |
1da177e4 LT |
547 | |
548 | if (!packet) | |
549 | return -ENOMEM; | |
550 | ||
551 | packet->generation = generation; | |
16c333a3 | 552 | retval = hpsb_send_packet_and_wait(packet); |
1da177e4 LT |
553 | if (retval < 0) |
554 | goto hpsb_write_fail; | |
555 | ||
16c333a3 | 556 | retval = hpsb_packet_success(packet); |
1da177e4 | 557 | |
16c333a3 JMH |
558 | hpsb_write_fail: |
559 | hpsb_free_tlabel(packet); | |
560 | hpsb_free_packet(packet); | |
1da177e4 | 561 | |
16c333a3 | 562 | return retval; |
1da177e4 LT |
563 | } |
564 | ||
9ac485dc | 565 | #if 0 |
1da177e4 LT |
566 | |
567 | int hpsb_lock(struct hpsb_host *host, nodeid_t node, unsigned int generation, | |
16c333a3 | 568 | u64 addr, int extcode, quadlet_t * data, quadlet_t arg) |
1da177e4 | 569 | { |
16c333a3 JMH |
570 | struct hpsb_packet *packet; |
571 | int retval = 0; | |
1da177e4 | 572 | |
16c333a3 | 573 | BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet |
1da177e4 LT |
574 | |
575 | packet = hpsb_make_lockpacket(host, node, addr, extcode, data, arg); | |
16c333a3 JMH |
576 | if (!packet) |
577 | return -ENOMEM; | |
1da177e4 LT |
578 | |
579 | packet->generation = generation; | |
16c333a3 | 580 | retval = hpsb_send_packet_and_wait(packet); |
1da177e4 LT |
581 | if (retval < 0) |
582 | goto hpsb_lock_fail; | |
583 | ||
16c333a3 | 584 | retval = hpsb_packet_success(packet); |
1da177e4 | 585 | |
16c333a3 JMH |
586 | if (retval == 0) { |
587 | *data = packet->data[0]; | |
588 | } | |
1da177e4 | 589 | |
16c333a3 JMH |
590 | hpsb_lock_fail: |
591 | hpsb_free_tlabel(packet); | |
592 | hpsb_free_packet(packet); | |
1da177e4 | 593 | |
16c333a3 | 594 | return retval; |
1da177e4 LT |
595 | } |
596 | ||
1da177e4 | 597 | int hpsb_send_gasp(struct hpsb_host *host, int channel, unsigned int generation, |
16c333a3 | 598 | quadlet_t * buffer, size_t length, u32 specifier_id, |
1da177e4 LT |
599 | unsigned int version) |
600 | { | |
601 | struct hpsb_packet *packet; | |
602 | int retval = 0; | |
603 | u16 specifier_id_hi = (specifier_id & 0x00ffff00) >> 8; | |
604 | u8 specifier_id_lo = specifier_id & 0xff; | |
605 | ||
606 | HPSB_VERBOSE("Send GASP: channel = %d, length = %Zd", channel, length); | |
607 | ||
608 | length += 8; | |
609 | ||
610 | packet = hpsb_make_streampacket(host, NULL, length, channel, 3, 0); | |
611 | if (!packet) | |
612 | return -ENOMEM; | |
613 | ||
614 | packet->data[0] = cpu_to_be32((host->node_id << 16) | specifier_id_hi); | |
16c333a3 JMH |
615 | packet->data[1] = |
616 | cpu_to_be32((specifier_id_lo << 24) | (version & 0x00ffffff)); | |
1da177e4 LT |
617 | |
618 | memcpy(&(packet->data[2]), buffer, length - 8); | |
619 | ||
620 | packet->generation = generation; | |
621 | ||
622 | packet->no_waiter = 1; | |
623 | ||
624 | retval = hpsb_send_packet(packet); | |
625 | if (retval < 0) | |
626 | hpsb_free_packet(packet); | |
627 | ||
628 | return retval; | |
629 | } | |
9ac485dc | 630 | |
16c333a3 | 631 | #endif /* 0 */ |