ia64/linux-2.6.18-xen.hg

view drivers/ieee1394/ieee1394_core.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 /*
2 * IEEE 1394 for Linux
3 *
4 * Core support: hpsb_packet management, packet handling and forwarding to
5 * highlevel or lowlevel code
6 *
7 * Copyright (C) 1999, 2000 Andreas E. Bombe
8 * 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
9 *
10 * This code is licensed under the GPL. See the file COPYING in the root
11 * directory of the kernel sources for details.
12 *
13 *
14 * Contributions:
15 *
16 * Manfred Weihs <weihs@ict.tuwien.ac.at>
17 * loopback functionality in hpsb_send_packet
18 * allow highlevel drivers to disable automatic response generation
19 * and to generate responses themselves (deferred)
20 *
21 */
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/string.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/interrupt.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/bitops.h>
32 #include <linux/kdev_t.h>
33 #include <linux/skbuff.h>
34 #include <linux/suspend.h>
35 #include <linux/kthread.h>
37 #include <asm/byteorder.h>
38 #include <asm/semaphore.h>
40 #include "ieee1394_types.h"
41 #include "ieee1394.h"
42 #include "hosts.h"
43 #include "ieee1394_core.h"
44 #include "highlevel.h"
45 #include "ieee1394_transactions.h"
46 #include "csr.h"
47 #include "nodemgr.h"
48 #include "dma.h"
49 #include "iso.h"
50 #include "config_roms.h"
52 /*
53 * Disable the nodemgr detection and config rom reading functionality.
54 */
55 static int disable_nodemgr;
56 module_param(disable_nodemgr, int, 0444);
57 MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality.");
59 /* Disable Isochronous Resource Manager functionality */
60 int hpsb_disable_irm = 0;
61 module_param_named(disable_irm, hpsb_disable_irm, bool, 0444);
62 MODULE_PARM_DESC(disable_irm,
63 "Disable Isochronous Resource Manager functionality.");
65 /* We are GPL, so treat us special */
66 MODULE_LICENSE("GPL");
68 /* Some globals used */
69 const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" };
70 struct class *hpsb_protocol_class;
72 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
73 static void dump_packet(const char *text, quadlet_t *data, int size, int speed)
74 {
75 int i;
77 size /= 4;
78 size = (size > 4 ? 4 : size);
80 printk(KERN_DEBUG "ieee1394: %s", text);
81 if (speed > -1 && speed < 6)
82 printk(" at %s", hpsb_speedto_str[speed]);
83 printk(":");
84 for (i = 0; i < size; i++)
85 printk(" %08x", data[i]);
86 printk("\n");
87 }
88 #else
89 #define dump_packet(a,b,c,d)
90 #endif
92 static void abort_requests(struct hpsb_host *host);
93 static void queue_packet_complete(struct hpsb_packet *packet);
96 /**
97 * hpsb_set_packet_complete_task - set the task that runs when a packet
98 * completes. You cannot call this more than once on a single packet
99 * before it is sent.
100 *
101 * @packet: the packet whose completion we want the task added to
102 * @routine: function to call
103 * @data: data (if any) to pass to the above function
104 */
105 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
106 void (*routine)(void *), void *data)
107 {
108 WARN_ON(packet->complete_routine != NULL);
109 packet->complete_routine = routine;
110 packet->complete_data = data;
111 return;
112 }
114 /**
115 * hpsb_alloc_packet - allocate new packet structure
116 * @data_size: size of the data block to be allocated
117 *
118 * This function allocates, initializes and returns a new &struct hpsb_packet.
119 * It can be used in interrupt context. A header block is always included, its
120 * size is big enough to contain all possible 1394 headers. The data block is
121 * only allocated when @data_size is not zero.
122 *
123 * For packets for which responses will be received the @data_size has to be big
124 * enough to contain the response's data block since no further allocation
125 * occurs at response matching time.
126 *
127 * The packet's generation value will be set to the current generation number
128 * for ease of use. Remember to overwrite it with your own recorded generation
129 * number if you can not be sure that your code will not race with a bus reset.
130 *
131 * Return value: A pointer to a &struct hpsb_packet or NULL on allocation
132 * failure.
133 */
134 struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
135 {
136 struct hpsb_packet *packet = NULL;
137 struct sk_buff *skb;
139 data_size = ((data_size + 3) & ~3);
141 skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
142 if (skb == NULL)
143 return NULL;
145 memset(skb->data, 0, data_size + sizeof(*packet));
147 packet = (struct hpsb_packet *)skb->data;
148 packet->skb = skb;
150 packet->header = packet->embedded_header;
151 packet->state = hpsb_unused;
152 packet->generation = -1;
153 INIT_LIST_HEAD(&packet->driver_list);
154 atomic_set(&packet->refcnt, 1);
156 if (data_size) {
157 packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
158 packet->data_size = data_size;
159 }
161 return packet;
162 }
165 /**
166 * hpsb_free_packet - free packet and data associated with it
167 * @packet: packet to free (is NULL safe)
168 *
169 * This function will free packet->data and finally the packet itself.
170 */
171 void hpsb_free_packet(struct hpsb_packet *packet)
172 {
173 if (packet && atomic_dec_and_test(&packet->refcnt)) {
174 BUG_ON(!list_empty(&packet->driver_list));
175 kfree_skb(packet->skb);
176 }
177 }
180 int hpsb_reset_bus(struct hpsb_host *host, int type)
181 {
182 if (!host->in_bus_reset) {
183 host->driver->devctl(host, RESET_BUS, type);
184 return 0;
185 } else {
186 return 1;
187 }
188 }
191 int hpsb_bus_reset(struct hpsb_host *host)
192 {
193 if (host->in_bus_reset) {
194 HPSB_NOTICE("%s called while bus reset already in progress",
195 __FUNCTION__);
196 return 1;
197 }
199 abort_requests(host);
200 host->in_bus_reset = 1;
201 host->irm_id = -1;
202 host->is_irm = 0;
203 host->busmgr_id = -1;
204 host->is_busmgr = 0;
205 host->is_cycmst = 0;
206 host->node_count = 0;
207 host->selfid_count = 0;
209 return 0;
210 }
213 /*
214 * Verify num_of_selfids SelfIDs and return number of nodes. Return zero in
215 * case verification failed.
216 */
217 static int check_selfids(struct hpsb_host *host)
218 {
219 int nodeid = -1;
220 int rest_of_selfids = host->selfid_count;
221 struct selfid *sid = (struct selfid *)host->topology_map;
222 struct ext_selfid *esid;
223 int esid_seq = 23;
225 host->nodes_active = 0;
227 while (rest_of_selfids--) {
228 if (!sid->extended) {
229 nodeid++;
230 esid_seq = 0;
232 if (sid->phy_id != nodeid) {
233 HPSB_INFO("SelfIDs failed monotony check with "
234 "%d", sid->phy_id);
235 return 0;
236 }
238 if (sid->link_active) {
239 host->nodes_active++;
240 if (sid->contender)
241 host->irm_id = LOCAL_BUS | sid->phy_id;
242 }
243 } else {
244 esid = (struct ext_selfid *)sid;
246 if ((esid->phy_id != nodeid)
247 || (esid->seq_nr != esid_seq)) {
248 HPSB_INFO("SelfIDs failed monotony check with "
249 "%d/%d", esid->phy_id, esid->seq_nr);
250 return 0;
251 }
252 esid_seq++;
253 }
254 sid++;
255 }
257 esid = (struct ext_selfid *)(sid - 1);
258 while (esid->extended) {
259 if ((esid->porta == SELFID_PORT_PARENT) ||
260 (esid->portb == SELFID_PORT_PARENT) ||
261 (esid->portc == SELFID_PORT_PARENT) ||
262 (esid->portd == SELFID_PORT_PARENT) ||
263 (esid->porte == SELFID_PORT_PARENT) ||
264 (esid->portf == SELFID_PORT_PARENT) ||
265 (esid->portg == SELFID_PORT_PARENT) ||
266 (esid->porth == SELFID_PORT_PARENT)) {
267 HPSB_INFO("SelfIDs failed root check on "
268 "extended SelfID");
269 return 0;
270 }
271 esid--;
272 }
274 sid = (struct selfid *)esid;
275 if ((sid->port0 == SELFID_PORT_PARENT) ||
276 (sid->port1 == SELFID_PORT_PARENT) ||
277 (sid->port2 == SELFID_PORT_PARENT)) {
278 HPSB_INFO("SelfIDs failed root check");
279 return 0;
280 }
282 host->node_count = nodeid + 1;
283 return 1;
284 }
286 static void build_speed_map(struct hpsb_host *host, int nodecount)
287 {
288 u8 cldcnt[nodecount];
289 u8 *map = host->speed_map;
290 u8 *speedcap = host->speed;
291 struct selfid *sid;
292 struct ext_selfid *esid;
293 int i, j, n;
295 for (i = 0; i < (nodecount * 64); i += 64) {
296 for (j = 0; j < nodecount; j++) {
297 map[i+j] = IEEE1394_SPEED_MAX;
298 }
299 }
301 for (i = 0; i < nodecount; i++) {
302 cldcnt[i] = 0;
303 }
305 /* find direct children count and speed */
306 for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
307 n = nodecount - 1;
308 (void *)sid >= (void *)host->topology_map; sid--) {
309 if (sid->extended) {
310 esid = (struct ext_selfid *)sid;
312 if (esid->porta == SELFID_PORT_CHILD) cldcnt[n]++;
313 if (esid->portb == SELFID_PORT_CHILD) cldcnt[n]++;
314 if (esid->portc == SELFID_PORT_CHILD) cldcnt[n]++;
315 if (esid->portd == SELFID_PORT_CHILD) cldcnt[n]++;
316 if (esid->porte == SELFID_PORT_CHILD) cldcnt[n]++;
317 if (esid->portf == SELFID_PORT_CHILD) cldcnt[n]++;
318 if (esid->portg == SELFID_PORT_CHILD) cldcnt[n]++;
319 if (esid->porth == SELFID_PORT_CHILD) cldcnt[n]++;
320 } else {
321 if (sid->port0 == SELFID_PORT_CHILD) cldcnt[n]++;
322 if (sid->port1 == SELFID_PORT_CHILD) cldcnt[n]++;
323 if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++;
325 speedcap[n] = sid->speed;
326 n--;
327 }
328 }
330 /* set self mapping */
331 for (i = 0; i < nodecount; i++) {
332 map[64*i + i] = speedcap[i];
333 }
335 /* fix up direct children count to total children count;
336 * also fix up speedcaps for sibling and parent communication */
337 for (i = 1; i < nodecount; i++) {
338 for (j = cldcnt[i], n = i - 1; j > 0; j--) {
339 cldcnt[i] += cldcnt[n];
340 speedcap[n] = min(speedcap[n], speedcap[i]);
341 n -= cldcnt[n] + 1;
342 }
343 }
345 for (n = 0; n < nodecount; n++) {
346 for (i = n - cldcnt[n]; i <= n; i++) {
347 for (j = 0; j < (n - cldcnt[n]); j++) {
348 map[j*64 + i] = map[i*64 + j] =
349 min(map[i*64 + j], speedcap[n]);
350 }
351 for (j = n + 1; j < nodecount; j++) {
352 map[j*64 + i] = map[i*64 + j] =
353 min(map[i*64 + j], speedcap[n]);
354 }
355 }
356 }
358 /* assume maximum speed for 1394b PHYs, nodemgr will correct it */
359 for (n = 0; n < nodecount; n++)
360 if (speedcap[n] == 3)
361 speedcap[n] = IEEE1394_SPEED_MAX;
362 }
365 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
366 {
367 if (host->in_bus_reset) {
368 HPSB_VERBOSE("Including SelfID 0x%x", sid);
369 host->topology_map[host->selfid_count++] = sid;
370 } else {
371 HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
372 sid, NODEID_TO_BUS(host->node_id));
373 }
374 }
376 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
377 {
378 if (!host->in_bus_reset)
379 HPSB_NOTICE("SelfID completion called outside of bus reset!");
381 host->node_id = LOCAL_BUS | phyid;
382 host->is_root = isroot;
384 if (!check_selfids(host)) {
385 if (host->reset_retries++ < 20) {
386 /* selfid stage did not complete without error */
387 HPSB_NOTICE("Error in SelfID stage, resetting");
388 host->in_bus_reset = 0;
389 /* this should work from ohci1394 now... */
390 hpsb_reset_bus(host, LONG_RESET);
391 return;
392 } else {
393 HPSB_NOTICE("Stopping out-of-control reset loop");
394 HPSB_NOTICE("Warning - topology map and speed map will not be valid");
395 host->reset_retries = 0;
396 }
397 } else {
398 host->reset_retries = 0;
399 build_speed_map(host, host->node_count);
400 }
402 HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
403 "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
405 /* irm_id is kept up to date by check_selfids() */
406 if (host->irm_id == host->node_id) {
407 host->is_irm = 1;
408 } else {
409 host->is_busmgr = 0;
410 host->is_irm = 0;
411 }
413 if (isroot) {
414 host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
415 host->is_cycmst = 1;
416 }
417 atomic_inc(&host->generation);
418 host->in_bus_reset = 0;
419 highlevel_host_reset(host);
420 }
423 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
424 int ackcode)
425 {
426 unsigned long flags;
428 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
430 packet->ack_code = ackcode;
432 if (packet->no_waiter || packet->state == hpsb_complete) {
433 /* if packet->no_waiter, must not have a tlabel allocated */
434 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
435 hpsb_free_packet(packet);
436 return;
437 }
439 atomic_dec(&packet->refcnt); /* drop HC's reference */
440 /* here the packet must be on the host->pending_packet_queue */
442 if (ackcode != ACK_PENDING || !packet->expect_response) {
443 packet->state = hpsb_complete;
444 __skb_unlink(packet->skb, &host->pending_packet_queue);
445 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
446 queue_packet_complete(packet);
447 return;
448 }
450 packet->state = hpsb_pending;
451 packet->sendtime = jiffies;
453 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
455 mod_timer(&host->timeout, jiffies + host->timeout_interval);
456 }
458 /**
459 * hpsb_send_phy_config - transmit a PHY configuration packet on the bus
460 * @host: host that PHY config packet gets sent through
461 * @rootid: root whose force_root bit should get set (-1 = don't set force_root)
462 * @gapcnt: gap count value to set (-1 = don't set gap count)
463 *
464 * This function sends a PHY config packet on the bus through the specified host.
465 *
466 * Return value: 0 for success or error number otherwise.
467 */
468 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
469 {
470 struct hpsb_packet *packet;
471 quadlet_t d = 0;
472 int retval = 0;
474 if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
475 (rootid == -1 && gapcnt == -1)) {
476 HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d",
477 rootid, gapcnt);
478 return -EINVAL;
479 }
481 if (rootid != -1)
482 d |= PHYPACKET_PHYCONFIG_R | rootid << PHYPACKET_PORT_SHIFT;
483 if (gapcnt != -1)
484 d |= PHYPACKET_PHYCONFIG_T | gapcnt << PHYPACKET_GAPCOUNT_SHIFT;
486 packet = hpsb_make_phypacket(host, d);
487 if (!packet)
488 return -ENOMEM;
490 packet->generation = get_hpsb_generation(host);
491 retval = hpsb_send_packet_and_wait(packet);
492 hpsb_free_packet(packet);
494 return retval;
495 }
497 /**
498 * hpsb_send_packet - transmit a packet on the bus
499 * @packet: packet to send
500 *
501 * The packet is sent through the host specified in the packet->host field.
502 * Before sending, the packet's transmit speed is automatically determined
503 * using the local speed map when it is an async, non-broadcast packet.
504 *
505 * Possibilities for failure are that host is either not initialized, in bus
506 * reset, the packet's generation number doesn't match the current generation
507 * number or the host reports a transmit error.
508 *
509 * Return value: 0 on success, negative errno on failure.
510 */
511 int hpsb_send_packet(struct hpsb_packet *packet)
512 {
513 struct hpsb_host *host = packet->host;
515 if (host->is_shutdown)
516 return -EINVAL;
517 if (host->in_bus_reset ||
518 (packet->generation != get_hpsb_generation(host)))
519 return -EAGAIN;
521 packet->state = hpsb_queued;
523 /* This just seems silly to me */
524 WARN_ON(packet->no_waiter && packet->expect_response);
526 if (!packet->no_waiter || packet->expect_response) {
527 atomic_inc(&packet->refcnt);
528 /* Set the initial "sendtime" to 10 seconds from now, to
529 prevent premature expiry. If a packet takes more than
530 10 seconds to hit the wire, we have bigger problems :) */
531 packet->sendtime = jiffies + 10 * HZ;
532 skb_queue_tail(&host->pending_packet_queue, packet->skb);
533 }
535 if (packet->node_id == host->node_id) {
536 /* it is a local request, so handle it locally */
538 quadlet_t *data;
539 size_t size = packet->data_size + packet->header_size;
541 data = kmalloc(size, GFP_ATOMIC);
542 if (!data) {
543 HPSB_ERR("unable to allocate memory for concatenating header and data");
544 return -ENOMEM;
545 }
547 memcpy(data, packet->header, packet->header_size);
549 if (packet->data_size)
550 memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size);
552 dump_packet("send packet local", packet->header, packet->header_size, -1);
554 hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE);
555 hpsb_packet_received(host, data, size, 0);
557 kfree(data);
559 return 0;
560 }
562 if (packet->type == hpsb_async &&
563 NODEID_TO_NODE(packet->node_id) != ALL_NODES)
564 packet->speed_code =
565 host->speed[NODEID_TO_NODE(packet->node_id)];
567 dump_packet("send packet", packet->header, packet->header_size, packet->speed_code);
569 return host->driver->transmit_packet(host, packet);
570 }
572 /* We could just use complete() directly as the packet complete
573 * callback, but this is more typesafe, in the sense that we get a
574 * compiler error if the prototype for complete() changes. */
576 static void complete_packet(void *data)
577 {
578 complete((struct completion *) data);
579 }
581 int hpsb_send_packet_and_wait(struct hpsb_packet *packet)
582 {
583 struct completion done;
584 int retval;
586 init_completion(&done);
587 hpsb_set_packet_complete_task(packet, complete_packet, &done);
588 retval = hpsb_send_packet(packet);
589 if (retval == 0)
590 wait_for_completion(&done);
592 return retval;
593 }
595 static void send_packet_nocare(struct hpsb_packet *packet)
596 {
597 if (hpsb_send_packet(packet) < 0) {
598 hpsb_free_packet(packet);
599 }
600 }
603 static void handle_packet_response(struct hpsb_host *host, int tcode,
604 quadlet_t *data, size_t size)
605 {
606 struct hpsb_packet *packet = NULL;
607 struct sk_buff *skb;
608 int tcode_match = 0;
609 int tlabel;
610 unsigned long flags;
612 tlabel = (data[0] >> 10) & 0x3f;
614 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
616 skb_queue_walk(&host->pending_packet_queue, skb) {
617 packet = (struct hpsb_packet *)skb->data;
618 if ((packet->tlabel == tlabel)
619 && (packet->node_id == (data[1] >> 16))){
620 break;
621 }
623 packet = NULL;
624 }
626 if (packet == NULL) {
627 HPSB_DEBUG("unsolicited response packet received - no tlabel match");
628 dump_packet("contents", data, 16, -1);
629 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
630 return;
631 }
633 switch (packet->tcode) {
634 case TCODE_WRITEQ:
635 case TCODE_WRITEB:
636 if (tcode != TCODE_WRITE_RESPONSE)
637 break;
638 tcode_match = 1;
639 memcpy(packet->header, data, 12);
640 break;
641 case TCODE_READQ:
642 if (tcode != TCODE_READQ_RESPONSE)
643 break;
644 tcode_match = 1;
645 memcpy(packet->header, data, 16);
646 break;
647 case TCODE_READB:
648 if (tcode != TCODE_READB_RESPONSE)
649 break;
650 tcode_match = 1;
651 BUG_ON(packet->skb->len - sizeof(*packet) < size - 16);
652 memcpy(packet->header, data, 16);
653 memcpy(packet->data, data + 4, size - 16);
654 break;
655 case TCODE_LOCK_REQUEST:
656 if (tcode != TCODE_LOCK_RESPONSE)
657 break;
658 tcode_match = 1;
659 size = min((size - 16), (size_t)8);
660 BUG_ON(packet->skb->len - sizeof(*packet) < size);
661 memcpy(packet->header, data, 16);
662 memcpy(packet->data, data + 4, size);
663 break;
664 }
666 if (!tcode_match) {
667 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
668 HPSB_INFO("unsolicited response packet received - tcode mismatch");
669 dump_packet("contents", data, 16, -1);
670 return;
671 }
673 __skb_unlink(skb, &host->pending_packet_queue);
675 if (packet->state == hpsb_queued) {
676 packet->sendtime = jiffies;
677 packet->ack_code = ACK_PENDING;
678 }
680 packet->state = hpsb_complete;
681 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
683 queue_packet_complete(packet);
684 }
687 static struct hpsb_packet *create_reply_packet(struct hpsb_host *host,
688 quadlet_t *data, size_t dsize)
689 {
690 struct hpsb_packet *p;
692 p = hpsb_alloc_packet(dsize);
693 if (unlikely(p == NULL)) {
694 /* FIXME - send data_error response */
695 return NULL;
696 }
698 p->type = hpsb_async;
699 p->state = hpsb_unused;
700 p->host = host;
701 p->node_id = data[1] >> 16;
702 p->tlabel = (data[0] >> 10) & 0x3f;
703 p->no_waiter = 1;
705 p->generation = get_hpsb_generation(host);
707 if (dsize % 4)
708 p->data[dsize / 4] = 0;
710 return p;
711 }
713 #define PREP_ASYNC_HEAD_RCODE(tc) \
714 packet->tcode = tc; \
715 packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
716 | (1 << 8) | (tc << 4); \
717 packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \
718 packet->header[2] = 0
720 static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode,
721 quadlet_t data)
722 {
723 PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE);
724 packet->header[3] = data;
725 packet->header_size = 16;
726 packet->data_size = 0;
727 }
729 static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode,
730 int length)
731 {
732 if (rcode != RCODE_COMPLETE)
733 length = 0;
735 PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE);
736 packet->header[3] = length << 16;
737 packet->header_size = 16;
738 packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
739 }
741 static void fill_async_write_resp(struct hpsb_packet *packet, int rcode)
742 {
743 PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE);
744 packet->header[2] = 0;
745 packet->header_size = 12;
746 packet->data_size = 0;
747 }
749 static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode,
750 int length)
751 {
752 if (rcode != RCODE_COMPLETE)
753 length = 0;
755 PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE);
756 packet->header[3] = (length << 16) | extcode;
757 packet->header_size = 16;
758 packet->data_size = length;
759 }
761 #define PREP_REPLY_PACKET(length) \
762 packet = create_reply_packet(host, data, length); \
763 if (packet == NULL) break
765 static void handle_incoming_packet(struct hpsb_host *host, int tcode,
766 quadlet_t *data, size_t size, int write_acked)
767 {
768 struct hpsb_packet *packet;
769 int length, rcode, extcode;
770 quadlet_t buffer;
771 nodeid_t source = data[1] >> 16;
772 nodeid_t dest = data[0] >> 16;
773 u16 flags = (u16) data[0];
774 u64 addr;
776 /* big FIXME - no error checking is done for an out of bounds length */
778 switch (tcode) {
779 case TCODE_WRITEQ:
780 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
781 rcode = highlevel_write(host, source, dest, data+3,
782 addr, 4, flags);
784 if (!write_acked
785 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
786 && (rcode >= 0)) {
787 /* not a broadcast write, reply */
788 PREP_REPLY_PACKET(0);
789 fill_async_write_resp(packet, rcode);
790 send_packet_nocare(packet);
791 }
792 break;
794 case TCODE_WRITEB:
795 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
796 rcode = highlevel_write(host, source, dest, data+4,
797 addr, data[3]>>16, flags);
799 if (!write_acked
800 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
801 && (rcode >= 0)) {
802 /* not a broadcast write, reply */
803 PREP_REPLY_PACKET(0);
804 fill_async_write_resp(packet, rcode);
805 send_packet_nocare(packet);
806 }
807 break;
809 case TCODE_READQ:
810 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
811 rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
813 if (rcode >= 0) {
814 PREP_REPLY_PACKET(0);
815 fill_async_readquad_resp(packet, rcode, buffer);
816 send_packet_nocare(packet);
817 }
818 break;
820 case TCODE_READB:
821 length = data[3] >> 16;
822 PREP_REPLY_PACKET(length);
824 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
825 rcode = highlevel_read(host, source, packet->data, addr,
826 length, flags);
828 if (rcode >= 0) {
829 fill_async_readblock_resp(packet, rcode, length);
830 send_packet_nocare(packet);
831 } else {
832 hpsb_free_packet(packet);
833 }
834 break;
836 case TCODE_LOCK_REQUEST:
837 length = data[3] >> 16;
838 extcode = data[3] & 0xffff;
839 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
841 PREP_REPLY_PACKET(8);
843 if ((extcode == 0) || (extcode >= 7)) {
844 /* let switch default handle error */
845 length = 0;
846 }
848 switch (length) {
849 case 4:
850 rcode = highlevel_lock(host, source, packet->data, addr,
851 data[4], 0, extcode,flags);
852 fill_async_lock_resp(packet, rcode, extcode, 4);
853 break;
854 case 8:
855 if ((extcode != EXTCODE_FETCH_ADD)
856 && (extcode != EXTCODE_LITTLE_ADD)) {
857 rcode = highlevel_lock(host, source,
858 packet->data, addr,
859 data[5], data[4],
860 extcode, flags);
861 fill_async_lock_resp(packet, rcode, extcode, 4);
862 } else {
863 rcode = highlevel_lock64(host, source,
864 (octlet_t *)packet->data, addr,
865 *(octlet_t *)(data + 4), 0ULL,
866 extcode, flags);
867 fill_async_lock_resp(packet, rcode, extcode, 8);
868 }
869 break;
870 case 16:
871 rcode = highlevel_lock64(host, source,
872 (octlet_t *)packet->data, addr,
873 *(octlet_t *)(data + 6),
874 *(octlet_t *)(data + 4),
875 extcode, flags);
876 fill_async_lock_resp(packet, rcode, extcode, 8);
877 break;
878 default:
879 rcode = RCODE_TYPE_ERROR;
880 fill_async_lock_resp(packet, rcode,
881 extcode, 0);
882 }
884 if (rcode >= 0) {
885 send_packet_nocare(packet);
886 } else {
887 hpsb_free_packet(packet);
888 }
889 break;
890 }
892 }
893 #undef PREP_REPLY_PACKET
896 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
897 int write_acked)
898 {
899 int tcode;
901 if (host->in_bus_reset) {
902 HPSB_INFO("received packet during reset; ignoring");
903 return;
904 }
906 dump_packet("received packet", data, size, -1);
908 tcode = (data[0] >> 4) & 0xf;
910 switch (tcode) {
911 case TCODE_WRITE_RESPONSE:
912 case TCODE_READQ_RESPONSE:
913 case TCODE_READB_RESPONSE:
914 case TCODE_LOCK_RESPONSE:
915 handle_packet_response(host, tcode, data, size);
916 break;
918 case TCODE_WRITEQ:
919 case TCODE_WRITEB:
920 case TCODE_READQ:
921 case TCODE_READB:
922 case TCODE_LOCK_REQUEST:
923 handle_incoming_packet(host, tcode, data, size, write_acked);
924 break;
927 case TCODE_ISO_DATA:
928 highlevel_iso_receive(host, data, size);
929 break;
931 case TCODE_CYCLE_START:
932 /* simply ignore this packet if it is passed on */
933 break;
935 default:
936 HPSB_NOTICE("received packet with bogus transaction code %d",
937 tcode);
938 break;
939 }
940 }
943 static void abort_requests(struct hpsb_host *host)
944 {
945 struct hpsb_packet *packet;
946 struct sk_buff *skb;
948 host->driver->devctl(host, CANCEL_REQUESTS, 0);
950 while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) {
951 packet = (struct hpsb_packet *)skb->data;
953 packet->state = hpsb_complete;
954 packet->ack_code = ACKX_ABORTED;
955 queue_packet_complete(packet);
956 }
957 }
959 void abort_timedouts(unsigned long __opaque)
960 {
961 struct hpsb_host *host = (struct hpsb_host *)__opaque;
962 unsigned long flags;
963 struct hpsb_packet *packet;
964 struct sk_buff *skb;
965 unsigned long expire;
967 spin_lock_irqsave(&host->csr.lock, flags);
968 expire = host->csr.expire;
969 spin_unlock_irqrestore(&host->csr.lock, flags);
971 /* Hold the lock around this, since we aren't dequeuing all
972 * packets, just ones we need. */
973 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
975 while (!skb_queue_empty(&host->pending_packet_queue)) {
976 skb = skb_peek(&host->pending_packet_queue);
978 packet = (struct hpsb_packet *)skb->data;
980 if (time_before(packet->sendtime + expire, jiffies)) {
981 __skb_unlink(skb, &host->pending_packet_queue);
982 packet->state = hpsb_complete;
983 packet->ack_code = ACKX_TIMEOUT;
984 queue_packet_complete(packet);
985 } else {
986 /* Since packets are added to the tail, the oldest
987 * ones are first, always. When we get to one that
988 * isn't timed out, the rest aren't either. */
989 break;
990 }
991 }
993 if (!skb_queue_empty(&host->pending_packet_queue))
994 mod_timer(&host->timeout, jiffies + host->timeout_interval);
996 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
997 }
1000 /* Kernel thread and vars, which handles packets that are completed. Only
1001 * packets that have a "complete" function are sent here. This way, the
1002 * completion is run out of kernel context, and doesn't block the rest of
1003 * the stack. */
1004 static struct task_struct *khpsbpkt_thread;
1005 static struct sk_buff_head hpsbpkt_queue;
1007 static void queue_packet_complete(struct hpsb_packet *packet)
1009 if (packet->no_waiter) {
1010 hpsb_free_packet(packet);
1011 return;
1013 if (packet->complete_routine != NULL) {
1014 skb_queue_tail(&hpsbpkt_queue, packet->skb);
1015 wake_up_process(khpsbpkt_thread);
1017 return;
1020 static int hpsbpkt_thread(void *__hi)
1022 struct sk_buff *skb;
1023 struct hpsb_packet *packet;
1024 void (*complete_routine)(void*);
1025 void *complete_data;
1027 current->flags |= PF_NOFREEZE;
1029 while (!kthread_should_stop()) {
1030 while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) {
1031 packet = (struct hpsb_packet *)skb->data;
1033 complete_routine = packet->complete_routine;
1034 complete_data = packet->complete_data;
1036 packet->complete_routine = packet->complete_data = NULL;
1038 complete_routine(complete_data);
1041 set_current_state(TASK_INTERRUPTIBLE);
1042 if (!skb_peek(&hpsbpkt_queue))
1043 schedule();
1044 __set_current_state(TASK_RUNNING);
1046 return 0;
1049 static int __init ieee1394_init(void)
1051 int i, ret;
1053 skb_queue_head_init(&hpsbpkt_queue);
1055 /* non-fatal error */
1056 if (hpsb_init_config_roms()) {
1057 HPSB_ERR("Failed to initialize some config rom entries.\n");
1058 HPSB_ERR("Some features may not be available\n");
1061 khpsbpkt_thread = kthread_run(hpsbpkt_thread, NULL, "khpsbpkt");
1062 if (IS_ERR(khpsbpkt_thread)) {
1063 HPSB_ERR("Failed to start hpsbpkt thread!\n");
1064 ret = PTR_ERR(khpsbpkt_thread);
1065 goto exit_cleanup_config_roms;
1068 if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) {
1069 HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR);
1070 ret = -ENODEV;
1071 goto exit_release_kernel_thread;
1074 ret = bus_register(&ieee1394_bus_type);
1075 if (ret < 0) {
1076 HPSB_INFO("bus register failed");
1077 goto release_chrdev;
1080 for (i = 0; fw_bus_attrs[i]; i++) {
1081 ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1082 if (ret < 0) {
1083 while (i >= 0) {
1084 bus_remove_file(&ieee1394_bus_type,
1085 fw_bus_attrs[i--]);
1087 bus_unregister(&ieee1394_bus_type);
1088 goto release_chrdev;
1092 ret = class_register(&hpsb_host_class);
1093 if (ret < 0)
1094 goto release_all_bus;
1096 hpsb_protocol_class = class_create(THIS_MODULE, "ieee1394_protocol");
1097 if (IS_ERR(hpsb_protocol_class)) {
1098 ret = PTR_ERR(hpsb_protocol_class);
1099 goto release_class_host;
1102 ret = init_csr();
1103 if (ret) {
1104 HPSB_INFO("init csr failed");
1105 ret = -ENOMEM;
1106 goto release_class_protocol;
1109 if (disable_nodemgr) {
1110 HPSB_INFO("nodemgr and IRM functionality disabled");
1111 /* We shouldn't contend for IRM with nodemgr disabled, since
1112 nodemgr implements functionality required of ieee1394a-2000
1113 IRMs */
1114 hpsb_disable_irm = 1;
1116 return 0;
1119 if (hpsb_disable_irm) {
1120 HPSB_INFO("IRM functionality disabled");
1123 ret = init_ieee1394_nodemgr();
1124 if (ret < 0) {
1125 HPSB_INFO("init nodemgr failed");
1126 goto cleanup_csr;
1129 return 0;
1131 cleanup_csr:
1132 cleanup_csr();
1133 release_class_protocol:
1134 class_destroy(hpsb_protocol_class);
1135 release_class_host:
1136 class_unregister(&hpsb_host_class);
1137 release_all_bus:
1138 for (i = 0; fw_bus_attrs[i]; i++)
1139 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1140 bus_unregister(&ieee1394_bus_type);
1141 release_chrdev:
1142 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1143 exit_release_kernel_thread:
1144 kthread_stop(khpsbpkt_thread);
1145 exit_cleanup_config_roms:
1146 hpsb_cleanup_config_roms();
1147 return ret;
1150 static void __exit ieee1394_cleanup(void)
1152 int i;
1154 if (!disable_nodemgr)
1155 cleanup_ieee1394_nodemgr();
1157 cleanup_csr();
1159 class_destroy(hpsb_protocol_class);
1160 class_unregister(&hpsb_host_class);
1161 for (i = 0; fw_bus_attrs[i]; i++)
1162 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1163 bus_unregister(&ieee1394_bus_type);
1165 kthread_stop(khpsbpkt_thread);
1167 hpsb_cleanup_config_roms();
1169 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1172 module_init(ieee1394_init);
1173 module_exit(ieee1394_cleanup);
1175 /* Exported symbols */
1177 /** hosts.c **/
1178 EXPORT_SYMBOL(hpsb_alloc_host);
1179 EXPORT_SYMBOL(hpsb_add_host);
1180 EXPORT_SYMBOL(hpsb_remove_host);
1181 EXPORT_SYMBOL(hpsb_update_config_rom_image);
1183 /** ieee1394_core.c **/
1184 EXPORT_SYMBOL(hpsb_speedto_str);
1185 EXPORT_SYMBOL(hpsb_protocol_class);
1186 EXPORT_SYMBOL(hpsb_set_packet_complete_task);
1187 EXPORT_SYMBOL(hpsb_alloc_packet);
1188 EXPORT_SYMBOL(hpsb_free_packet);
1189 EXPORT_SYMBOL(hpsb_send_packet);
1190 EXPORT_SYMBOL(hpsb_reset_bus);
1191 EXPORT_SYMBOL(hpsb_bus_reset);
1192 EXPORT_SYMBOL(hpsb_selfid_received);
1193 EXPORT_SYMBOL(hpsb_selfid_complete);
1194 EXPORT_SYMBOL(hpsb_packet_sent);
1195 EXPORT_SYMBOL(hpsb_packet_received);
1196 EXPORT_SYMBOL_GPL(hpsb_disable_irm);
1197 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1198 EXPORT_SYMBOL(hpsb_send_phy_config);
1199 EXPORT_SYMBOL(hpsb_send_packet_and_wait);
1200 #endif
1202 /** ieee1394_transactions.c **/
1203 EXPORT_SYMBOL(hpsb_get_tlabel);
1204 EXPORT_SYMBOL(hpsb_free_tlabel);
1205 EXPORT_SYMBOL(hpsb_make_readpacket);
1206 EXPORT_SYMBOL(hpsb_make_writepacket);
1207 EXPORT_SYMBOL(hpsb_make_streampacket);
1208 EXPORT_SYMBOL(hpsb_make_lockpacket);
1209 EXPORT_SYMBOL(hpsb_make_lock64packet);
1210 EXPORT_SYMBOL(hpsb_make_phypacket);
1211 EXPORT_SYMBOL(hpsb_make_isopacket);
1212 EXPORT_SYMBOL(hpsb_read);
1213 EXPORT_SYMBOL(hpsb_write);
1214 EXPORT_SYMBOL(hpsb_packet_success);
1216 /** highlevel.c **/
1217 EXPORT_SYMBOL(hpsb_register_highlevel);
1218 EXPORT_SYMBOL(hpsb_unregister_highlevel);
1219 EXPORT_SYMBOL(hpsb_register_addrspace);
1220 EXPORT_SYMBOL(hpsb_unregister_addrspace);
1221 EXPORT_SYMBOL(hpsb_allocate_and_register_addrspace);
1222 EXPORT_SYMBOL(hpsb_listen_channel);
1223 EXPORT_SYMBOL(hpsb_unlisten_channel);
1224 EXPORT_SYMBOL(hpsb_get_hostinfo);
1225 EXPORT_SYMBOL(hpsb_create_hostinfo);
1226 EXPORT_SYMBOL(hpsb_destroy_hostinfo);
1227 EXPORT_SYMBOL(hpsb_set_hostinfo_key);
1228 EXPORT_SYMBOL(hpsb_get_hostinfo_bykey);
1229 EXPORT_SYMBOL(hpsb_set_hostinfo);
1230 EXPORT_SYMBOL(highlevel_host_reset);
1231 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1232 EXPORT_SYMBOL(highlevel_add_host);
1233 EXPORT_SYMBOL(highlevel_remove_host);
1234 #endif
1236 /** nodemgr.c **/
1237 EXPORT_SYMBOL(hpsb_node_fill_packet);
1238 EXPORT_SYMBOL(hpsb_node_write);
1239 EXPORT_SYMBOL(hpsb_register_protocol);
1240 EXPORT_SYMBOL(hpsb_unregister_protocol);
1241 EXPORT_SYMBOL(ieee1394_bus_type);
1242 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1243 EXPORT_SYMBOL(nodemgr_for_each_host);
1244 #endif
1246 /** csr.c **/
1247 EXPORT_SYMBOL(hpsb_update_config_rom);
1249 /** dma.c **/
1250 EXPORT_SYMBOL(dma_prog_region_init);
1251 EXPORT_SYMBOL(dma_prog_region_alloc);
1252 EXPORT_SYMBOL(dma_prog_region_free);
1253 EXPORT_SYMBOL(dma_region_init);
1254 EXPORT_SYMBOL(dma_region_alloc);
1255 EXPORT_SYMBOL(dma_region_free);
1256 EXPORT_SYMBOL(dma_region_sync_for_cpu);
1257 EXPORT_SYMBOL(dma_region_sync_for_device);
1258 EXPORT_SYMBOL(dma_region_mmap);
1259 EXPORT_SYMBOL(dma_region_offset_to_bus);
1261 /** iso.c **/
1262 EXPORT_SYMBOL(hpsb_iso_xmit_init);
1263 EXPORT_SYMBOL(hpsb_iso_recv_init);
1264 EXPORT_SYMBOL(hpsb_iso_xmit_start);
1265 EXPORT_SYMBOL(hpsb_iso_recv_start);
1266 EXPORT_SYMBOL(hpsb_iso_recv_listen_channel);
1267 EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel);
1268 EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask);
1269 EXPORT_SYMBOL(hpsb_iso_stop);
1270 EXPORT_SYMBOL(hpsb_iso_shutdown);
1271 EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet);
1272 EXPORT_SYMBOL(hpsb_iso_xmit_sync);
1273 EXPORT_SYMBOL(hpsb_iso_recv_release_packets);
1274 EXPORT_SYMBOL(hpsb_iso_n_ready);
1275 EXPORT_SYMBOL(hpsb_iso_packet_sent);
1276 EXPORT_SYMBOL(hpsb_iso_packet_received);
1277 EXPORT_SYMBOL(hpsb_iso_wake);
1278 EXPORT_SYMBOL(hpsb_iso_recv_flush);
1280 /** csr1212.c **/
1281 EXPORT_SYMBOL(csr1212_new_directory);
1282 EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
1283 EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
1284 EXPORT_SYMBOL(csr1212_release_keyval);
1285 EXPORT_SYMBOL(csr1212_read);
1286 EXPORT_SYMBOL(csr1212_parse_keyval);
1287 EXPORT_SYMBOL(_csr1212_read_keyval);
1288 EXPORT_SYMBOL(_csr1212_destroy_keyval);
1289 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1290 EXPORT_SYMBOL(csr1212_create_csr);
1291 EXPORT_SYMBOL(csr1212_init_local_csr);
1292 EXPORT_SYMBOL(csr1212_new_immediate);
1293 EXPORT_SYMBOL(csr1212_associate_keyval);
1294 EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
1295 EXPORT_SYMBOL(csr1212_destroy_csr);
1296 EXPORT_SYMBOL(csr1212_generate_csr_image);
1297 EXPORT_SYMBOL(csr1212_parse_csr);
1298 #endif