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