[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / ieee1394 / ieee1394_core.c
bloba294e45c77cdfb09c7338ca07c2777514427ed7a
1 /*
2 * IEEE 1394 for Linux
4 * Core support: hpsb_packet management, packet handling and forwarding to
5 * highlevel or lowlevel code
7 * Copyright (C) 1999, 2000 Andreas E. Bombe
8 * 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
10 * This code is licensed under the GPL. See the file COPYING in the root
11 * directory of the kernel sources for details.
14 * Contributions:
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)
23 #include <linux/config.h>
24 #include <linux/kernel.h>
25 #include <linux/list.h>
26 #include <linux/string.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/module.h>
31 #include <linux/moduleparam.h>
32 #include <linux/bitops.h>
33 #include <linux/kdev_t.h>
34 #include <linux/skbuff.h>
35 #include <linux/suspend.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"
53 * Disable the nodemgr detection and config rom reading functionality.
55 static int disable_nodemgr = 0;
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, 0);
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_simple *hpsb_protocol_class;
72 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
73 static void dump_packet(const char *text, quadlet_t *data, int size)
75 int i;
77 size /= 4;
78 size = (size > 4 ? 4 : size);
80 printk(KERN_DEBUG "ieee1394: %s", text);
81 for (i = 0; i < size; i++)
82 printk(" %08x", data[i]);
83 printk("\n");
85 #else
86 #define dump_packet(x,y,z)
87 #endif
89 static void abort_requests(struct hpsb_host *host);
90 static void queue_packet_complete(struct hpsb_packet *packet);
93 /**
94 * hpsb_set_packet_complete_task - set the task that runs when a packet
95 * completes. You cannot call this more than once on a single packet
96 * before it is sent.
98 * @packet: the packet whose completion we want the task added to
99 * @routine: function to call
100 * @data: data (if any) to pass to the above function
102 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
103 void (*routine)(void *), void *data)
105 WARN_ON(packet->complete_routine != NULL);
106 packet->complete_routine = routine;
107 packet->complete_data = data;
108 return;
112 * hpsb_alloc_packet - allocate new packet structure
113 * @data_size: size of the data block to be allocated
115 * This function allocates, initializes and returns a new &struct hpsb_packet.
116 * It can be used in interrupt context. A header block is always included, its
117 * size is big enough to contain all possible 1394 headers. The data block is
118 * only allocated when @data_size is not zero.
120 * For packets for which responses will be received the @data_size has to be big
121 * enough to contain the response's data block since no further allocation
122 * occurs at response matching time.
124 * The packet's generation value will be set to the current generation number
125 * for ease of use. Remember to overwrite it with your own recorded generation
126 * number if you can not be sure that your code will not race with a bus reset.
128 * Return value: A pointer to a &struct hpsb_packet or NULL on allocation
129 * failure.
131 struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
133 struct hpsb_packet *packet = NULL;
134 struct sk_buff *skb;
136 data_size = ((data_size + 3) & ~3);
138 skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
139 if (skb == NULL)
140 return NULL;
142 memset(skb->data, 0, data_size + sizeof(*packet));
144 packet = (struct hpsb_packet *)skb->data;
145 packet->skb = skb;
147 packet->header = packet->embedded_header;
148 packet->state = hpsb_unused;
149 packet->generation = -1;
150 INIT_LIST_HEAD(&packet->driver_list);
151 atomic_set(&packet->refcnt, 1);
153 if (data_size) {
154 packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
155 packet->data_size = data_size;
158 return packet;
163 * hpsb_free_packet - free packet and data associated with it
164 * @packet: packet to free (is NULL safe)
166 * This function will free packet->data and finally the packet itself.
168 void hpsb_free_packet(struct hpsb_packet *packet)
170 if (packet && atomic_dec_and_test(&packet->refcnt)) {
171 BUG_ON(!list_empty(&packet->driver_list));
172 kfree_skb(packet->skb);
177 int hpsb_reset_bus(struct hpsb_host *host, int type)
179 if (!host->in_bus_reset) {
180 host->driver->devctl(host, RESET_BUS, type);
181 return 0;
182 } else {
183 return 1;
188 int hpsb_bus_reset(struct hpsb_host *host)
190 if (host->in_bus_reset) {
191 HPSB_NOTICE("%s called while bus reset already in progress",
192 __FUNCTION__);
193 return 1;
196 abort_requests(host);
197 host->in_bus_reset = 1;
198 host->irm_id = -1;
199 host->is_irm = 0;
200 host->busmgr_id = -1;
201 host->is_busmgr = 0;
202 host->is_cycmst = 0;
203 host->node_count = 0;
204 host->selfid_count = 0;
206 return 0;
211 * Verify num_of_selfids SelfIDs and return number of nodes. Return zero in
212 * case verification failed.
214 static int check_selfids(struct hpsb_host *host)
216 int nodeid = -1;
217 int rest_of_selfids = host->selfid_count;
218 struct selfid *sid = (struct selfid *)host->topology_map;
219 struct ext_selfid *esid;
220 int esid_seq = 23;
222 host->nodes_active = 0;
224 while (rest_of_selfids--) {
225 if (!sid->extended) {
226 nodeid++;
227 esid_seq = 0;
229 if (sid->phy_id != nodeid) {
230 HPSB_INFO("SelfIDs failed monotony check with "
231 "%d", sid->phy_id);
232 return 0;
235 if (sid->link_active) {
236 host->nodes_active++;
237 if (sid->contender)
238 host->irm_id = LOCAL_BUS | sid->phy_id;
240 } else {
241 esid = (struct ext_selfid *)sid;
243 if ((esid->phy_id != nodeid)
244 || (esid->seq_nr != esid_seq)) {
245 HPSB_INFO("SelfIDs failed monotony check with "
246 "%d/%d", esid->phy_id, esid->seq_nr);
247 return 0;
249 esid_seq++;
251 sid++;
254 esid = (struct ext_selfid *)(sid - 1);
255 while (esid->extended) {
256 if ((esid->porta == 0x2) || (esid->portb == 0x2)
257 || (esid->portc == 0x2) || (esid->portd == 0x2)
258 || (esid->porte == 0x2) || (esid->portf == 0x2)
259 || (esid->portg == 0x2) || (esid->porth == 0x2)) {
260 HPSB_INFO("SelfIDs failed root check on "
261 "extended SelfID");
262 return 0;
264 esid--;
267 sid = (struct selfid *)esid;
268 if ((sid->port0 == 0x2) || (sid->port1 == 0x2) || (sid->port2 == 0x2)) {
269 HPSB_INFO("SelfIDs failed root check");
270 return 0;
273 host->node_count = nodeid + 1;
274 return 1;
277 static void build_speed_map(struct hpsb_host *host, int nodecount)
279 u8 speedcap[nodecount];
280 u8 cldcnt[nodecount];
281 u8 *map = host->speed_map;
282 struct selfid *sid;
283 struct ext_selfid *esid;
284 int i, j, n;
286 for (i = 0; i < (nodecount * 64); i += 64) {
287 for (j = 0; j < nodecount; j++) {
288 map[i+j] = IEEE1394_SPEED_MAX;
292 for (i = 0; i < nodecount; i++) {
293 cldcnt[i] = 0;
296 /* find direct children count and speed */
297 for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
298 n = nodecount - 1;
299 (void *)sid >= (void *)host->topology_map; sid--) {
300 if (sid->extended) {
301 esid = (struct ext_selfid *)sid;
303 if (esid->porta == 0x3) cldcnt[n]++;
304 if (esid->portb == 0x3) cldcnt[n]++;
305 if (esid->portc == 0x3) cldcnt[n]++;
306 if (esid->portd == 0x3) cldcnt[n]++;
307 if (esid->porte == 0x3) cldcnt[n]++;
308 if (esid->portf == 0x3) cldcnt[n]++;
309 if (esid->portg == 0x3) cldcnt[n]++;
310 if (esid->porth == 0x3) cldcnt[n]++;
311 } else {
312 if (sid->port0 == 0x3) cldcnt[n]++;
313 if (sid->port1 == 0x3) cldcnt[n]++;
314 if (sid->port2 == 0x3) cldcnt[n]++;
316 speedcap[n] = sid->speed;
317 n--;
321 /* set self mapping */
322 for (i = 0; i < nodecount; i++) {
323 map[64*i + i] = speedcap[i];
326 /* fix up direct children count to total children count;
327 * also fix up speedcaps for sibling and parent communication */
328 for (i = 1; i < nodecount; i++) {
329 for (j = cldcnt[i], n = i - 1; j > 0; j--) {
330 cldcnt[i] += cldcnt[n];
331 speedcap[n] = min(speedcap[n], speedcap[i]);
332 n -= cldcnt[n] + 1;
336 for (n = 0; n < nodecount; n++) {
337 for (i = n - cldcnt[n]; i <= n; i++) {
338 for (j = 0; j < (n - cldcnt[n]); j++) {
339 map[j*64 + i] = map[i*64 + j] =
340 min(map[i*64 + j], speedcap[n]);
342 for (j = n + 1; j < nodecount; j++) {
343 map[j*64 + i] = map[i*64 + j] =
344 min(map[i*64 + j], speedcap[n]);
351 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
353 if (host->in_bus_reset) {
354 HPSB_VERBOSE("Including SelfID 0x%x", sid);
355 host->topology_map[host->selfid_count++] = sid;
356 } else {
357 HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
358 sid, NODEID_TO_BUS(host->node_id));
362 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
364 if (!host->in_bus_reset)
365 HPSB_NOTICE("SelfID completion called outside of bus reset!");
367 host->node_id = LOCAL_BUS | phyid;
368 host->is_root = isroot;
370 if (!check_selfids(host)) {
371 if (host->reset_retries++ < 20) {
372 /* selfid stage did not complete without error */
373 HPSB_NOTICE("Error in SelfID stage, resetting");
374 host->in_bus_reset = 0;
375 /* this should work from ohci1394 now... */
376 hpsb_reset_bus(host, LONG_RESET);
377 return;
378 } else {
379 HPSB_NOTICE("Stopping out-of-control reset loop");
380 HPSB_NOTICE("Warning - topology map and speed map will not be valid");
381 host->reset_retries = 0;
383 } else {
384 host->reset_retries = 0;
385 build_speed_map(host, host->node_count);
388 HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
389 "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
391 /* irm_id is kept up to date by check_selfids() */
392 if (host->irm_id == host->node_id) {
393 host->is_irm = 1;
394 } else {
395 host->is_busmgr = 0;
396 host->is_irm = 0;
399 if (isroot) {
400 host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
401 host->is_cycmst = 1;
403 atomic_inc(&host->generation);
404 host->in_bus_reset = 0;
405 highlevel_host_reset(host);
409 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
410 int ackcode)
412 unsigned long flags;
414 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
416 packet->ack_code = ackcode;
418 if (packet->no_waiter || packet->state == hpsb_complete) {
419 /* if packet->no_waiter, must not have a tlabel allocated */
420 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
421 hpsb_free_packet(packet);
422 return;
425 atomic_dec(&packet->refcnt); /* drop HC's reference */
426 /* here the packet must be on the host->pending_packet_queue */
428 if (ackcode != ACK_PENDING || !packet->expect_response) {
429 packet->state = hpsb_complete;
430 __skb_unlink(packet->skb, &host->pending_packet_queue);
431 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
432 queue_packet_complete(packet);
433 return;
436 packet->state = hpsb_pending;
437 packet->sendtime = jiffies;
439 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
441 mod_timer(&host->timeout, jiffies + host->timeout_interval);
445 * hpsb_send_phy_config - transmit a PHY configuration packet on the bus
446 * @host: host that PHY config packet gets sent through
447 * @rootid: root whose force_root bit should get set (-1 = don't set force_root)
448 * @gapcnt: gap count value to set (-1 = don't set gap count)
450 * This function sends a PHY config packet on the bus through the specified host.
452 * Return value: 0 for success or error number otherwise.
454 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
456 struct hpsb_packet *packet;
457 int retval = 0;
459 if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
460 (rootid == -1 && gapcnt == -1)) {
461 HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d",
462 rootid, gapcnt);
463 return -EINVAL;
466 packet = hpsb_alloc_packet(0);
467 if (!packet)
468 return -ENOMEM;
470 packet->host = host;
471 packet->header_size = 8;
472 packet->data_size = 0;
473 packet->expect_response = 0;
474 packet->no_waiter = 0;
475 packet->type = hpsb_raw;
476 packet->header[0] = 0;
477 if (rootid != -1)
478 packet->header[0] |= rootid << 24 | 1 << 23;
479 if (gapcnt != -1)
480 packet->header[0] |= gapcnt << 16 | 1 << 22;
482 packet->header[1] = ~packet->header[0];
484 packet->generation = get_hpsb_generation(host);
486 retval = hpsb_send_packet_and_wait(packet);
487 hpsb_free_packet(packet);
489 return retval;
493 * hpsb_send_packet - transmit a packet on the bus
494 * @packet: packet to send
496 * The packet is sent through the host specified in the packet->host field.
497 * Before sending, the packet's transmit speed is automatically determined
498 * using the local speed map when it is an async, non-broadcast packet.
500 * Possibilities for failure are that host is either not initialized, in bus
501 * reset, the packet's generation number doesn't match the current generation
502 * number or the host reports a transmit error.
504 * Return value: 0 on success, negative errno on failure.
506 int hpsb_send_packet(struct hpsb_packet *packet)
508 struct hpsb_host *host = packet->host;
510 if (host->is_shutdown)
511 return -EINVAL;
512 if (host->in_bus_reset ||
513 (packet->generation != get_hpsb_generation(host)))
514 return -EAGAIN;
516 packet->state = hpsb_queued;
518 /* This just seems silly to me */
519 WARN_ON(packet->no_waiter && packet->expect_response);
521 if (!packet->no_waiter || packet->expect_response) {
522 atomic_inc(&packet->refcnt);
523 packet->sendtime = jiffies + 10 * HZ;
524 skb_queue_tail(&host->pending_packet_queue, packet->skb);
527 if (packet->node_id == host->node_id) {
528 /* it is a local request, so handle it locally */
530 quadlet_t *data;
531 size_t size = packet->data_size + packet->header_size;
533 data = kmalloc(size, GFP_ATOMIC);
534 if (!data) {
535 HPSB_ERR("unable to allocate memory for concatenating header and data");
536 return -ENOMEM;
539 memcpy(data, packet->header, packet->header_size);
541 if (packet->data_size)
542 memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size);
544 dump_packet("send packet local:", packet->header,
545 packet->header_size);
547 hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE);
548 hpsb_packet_received(host, data, size, 0);
550 kfree(data);
552 return 0;
555 if (packet->type == hpsb_async && packet->node_id != ALL_NODES) {
556 packet->speed_code =
557 host->speed_map[NODEID_TO_NODE(host->node_id) * 64
558 + NODEID_TO_NODE(packet->node_id)];
561 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
562 switch (packet->speed_code) {
563 case 2:
564 dump_packet("send packet 400:", packet->header,
565 packet->header_size);
566 break;
567 case 1:
568 dump_packet("send packet 200:", packet->header,
569 packet->header_size);
570 break;
571 default:
572 dump_packet("send packet 100:", packet->header,
573 packet->header_size);
575 #endif
577 return host->driver->transmit_packet(host, packet);
580 /* We could just use complete() directly as the packet complete
581 * callback, but this is more typesafe, in the sense that we get a
582 * compiler error if the prototype for complete() changes. */
584 static void complete_packet(void *data)
586 complete((struct completion *) data);
589 int hpsb_send_packet_and_wait(struct hpsb_packet *packet)
591 struct completion done;
592 int retval;
594 init_completion(&done);
595 hpsb_set_packet_complete_task(packet, complete_packet, &done);
596 retval = hpsb_send_packet(packet);
597 if (retval == 0)
598 wait_for_completion(&done);
600 return retval;
603 static void send_packet_nocare(struct hpsb_packet *packet)
605 if (hpsb_send_packet(packet) < 0) {
606 hpsb_free_packet(packet);
611 static void handle_packet_response(struct hpsb_host *host, int tcode,
612 quadlet_t *data, size_t size)
614 struct hpsb_packet *packet = NULL;
615 struct sk_buff *skb;
616 int tcode_match = 0;
617 int tlabel;
618 unsigned long flags;
620 tlabel = (data[0] >> 10) & 0x3f;
622 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
624 skb_queue_walk(&host->pending_packet_queue, skb) {
625 packet = (struct hpsb_packet *)skb->data;
626 if ((packet->tlabel == tlabel)
627 && (packet->node_id == (data[1] >> 16))){
628 break;
631 packet = NULL;
634 if (packet == NULL) {
635 HPSB_DEBUG("unsolicited response packet received - no tlabel match");
636 dump_packet("contents:", data, 16);
637 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
638 return;
641 switch (packet->tcode) {
642 case TCODE_WRITEQ:
643 case TCODE_WRITEB:
644 if (tcode != TCODE_WRITE_RESPONSE)
645 break;
646 tcode_match = 1;
647 memcpy(packet->header, data, 12);
648 break;
649 case TCODE_READQ:
650 if (tcode != TCODE_READQ_RESPONSE)
651 break;
652 tcode_match = 1;
653 memcpy(packet->header, data, 16);
654 break;
655 case TCODE_READB:
656 if (tcode != TCODE_READB_RESPONSE)
657 break;
658 tcode_match = 1;
659 BUG_ON(packet->skb->len - sizeof(*packet) < size - 16);
660 memcpy(packet->header, data, 16);
661 memcpy(packet->data, data + 4, size - 16);
662 break;
663 case TCODE_LOCK_REQUEST:
664 if (tcode != TCODE_LOCK_RESPONSE)
665 break;
666 tcode_match = 1;
667 size = min((size - 16), (size_t)8);
668 BUG_ON(packet->skb->len - sizeof(*packet) < size);
669 memcpy(packet->header, data, 16);
670 memcpy(packet->data, data + 4, size);
671 break;
674 if (!tcode_match) {
675 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
676 HPSB_INFO("unsolicited response packet received - tcode mismatch");
677 dump_packet("contents:", data, 16);
678 return;
681 __skb_unlink(skb, skb->list);
683 if (packet->state == hpsb_queued) {
684 packet->sendtime = jiffies;
685 packet->ack_code = ACK_PENDING;
688 packet->state = hpsb_complete;
689 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
691 queue_packet_complete(packet);
695 static struct hpsb_packet *create_reply_packet(struct hpsb_host *host,
696 quadlet_t *data, size_t dsize)
698 struct hpsb_packet *p;
700 p = hpsb_alloc_packet(dsize);
701 if (unlikely(p == NULL)) {
702 /* FIXME - send data_error response */
703 return NULL;
706 p->type = hpsb_async;
707 p->state = hpsb_unused;
708 p->host = host;
709 p->node_id = data[1] >> 16;
710 p->tlabel = (data[0] >> 10) & 0x3f;
711 p->no_waiter = 1;
713 p->generation = get_hpsb_generation(host);
715 if (dsize % 4)
716 p->data[dsize / 4] = 0;
718 return p;
721 #define PREP_ASYNC_HEAD_RCODE(tc) \
722 packet->tcode = tc; \
723 packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
724 | (1 << 8) | (tc << 4); \
725 packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \
726 packet->header[2] = 0
728 static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode,
729 quadlet_t data)
731 PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE);
732 packet->header[3] = data;
733 packet->header_size = 16;
734 packet->data_size = 0;
737 static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode,
738 int length)
740 if (rcode != RCODE_COMPLETE)
741 length = 0;
743 PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE);
744 packet->header[3] = length << 16;
745 packet->header_size = 16;
746 packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
749 static void fill_async_write_resp(struct hpsb_packet *packet, int rcode)
751 PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE);
752 packet->header[2] = 0;
753 packet->header_size = 12;
754 packet->data_size = 0;
757 static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode,
758 int length)
760 if (rcode != RCODE_COMPLETE)
761 length = 0;
763 PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE);
764 packet->header[3] = (length << 16) | extcode;
765 packet->header_size = 16;
766 packet->data_size = length;
769 #define PREP_REPLY_PACKET(length) \
770 packet = create_reply_packet(host, data, length); \
771 if (packet == NULL) break
773 static void handle_incoming_packet(struct hpsb_host *host, int tcode,
774 quadlet_t *data, size_t size, int write_acked)
776 struct hpsb_packet *packet;
777 int length, rcode, extcode;
778 quadlet_t buffer;
779 nodeid_t source = data[1] >> 16;
780 nodeid_t dest = data[0] >> 16;
781 u16 flags = (u16) data[0];
782 u64 addr;
784 /* big FIXME - no error checking is done for an out of bounds length */
786 switch (tcode) {
787 case TCODE_WRITEQ:
788 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
789 rcode = highlevel_write(host, source, dest, data+3,
790 addr, 4, flags);
792 if (!write_acked
793 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
794 && (rcode >= 0)) {
795 /* not a broadcast write, reply */
796 PREP_REPLY_PACKET(0);
797 fill_async_write_resp(packet, rcode);
798 send_packet_nocare(packet);
800 break;
802 case TCODE_WRITEB:
803 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
804 rcode = highlevel_write(host, source, dest, data+4,
805 addr, data[3]>>16, flags);
807 if (!write_acked
808 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
809 && (rcode >= 0)) {
810 /* not a broadcast write, reply */
811 PREP_REPLY_PACKET(0);
812 fill_async_write_resp(packet, rcode);
813 send_packet_nocare(packet);
815 break;
817 case TCODE_READQ:
818 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
819 rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
821 if (rcode >= 0) {
822 PREP_REPLY_PACKET(0);
823 fill_async_readquad_resp(packet, rcode, buffer);
824 send_packet_nocare(packet);
826 break;
828 case TCODE_READB:
829 length = data[3] >> 16;
830 PREP_REPLY_PACKET(length);
832 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
833 rcode = highlevel_read(host, source, packet->data, addr,
834 length, flags);
836 if (rcode >= 0) {
837 fill_async_readblock_resp(packet, rcode, length);
838 send_packet_nocare(packet);
839 } else {
840 hpsb_free_packet(packet);
842 break;
844 case TCODE_LOCK_REQUEST:
845 length = data[3] >> 16;
846 extcode = data[3] & 0xffff;
847 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
849 PREP_REPLY_PACKET(8);
851 if ((extcode == 0) || (extcode >= 7)) {
852 /* let switch default handle error */
853 length = 0;
856 switch (length) {
857 case 4:
858 rcode = highlevel_lock(host, source, packet->data, addr,
859 data[4], 0, extcode,flags);
860 fill_async_lock_resp(packet, rcode, extcode, 4);
861 break;
862 case 8:
863 if ((extcode != EXTCODE_FETCH_ADD)
864 && (extcode != EXTCODE_LITTLE_ADD)) {
865 rcode = highlevel_lock(host, source,
866 packet->data, addr,
867 data[5], data[4],
868 extcode, flags);
869 fill_async_lock_resp(packet, rcode, extcode, 4);
870 } else {
871 rcode = highlevel_lock64(host, source,
872 (octlet_t *)packet->data, addr,
873 *(octlet_t *)(data + 4), 0ULL,
874 extcode, flags);
875 fill_async_lock_resp(packet, rcode, extcode, 8);
877 break;
878 case 16:
879 rcode = highlevel_lock64(host, source,
880 (octlet_t *)packet->data, addr,
881 *(octlet_t *)(data + 6),
882 *(octlet_t *)(data + 4),
883 extcode, flags);
884 fill_async_lock_resp(packet, rcode, extcode, 8);
885 break;
886 default:
887 rcode = RCODE_TYPE_ERROR;
888 fill_async_lock_resp(packet, rcode,
889 extcode, 0);
892 if (rcode >= 0) {
893 send_packet_nocare(packet);
894 } else {
895 hpsb_free_packet(packet);
897 break;
901 #undef PREP_REPLY_PACKET
904 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
905 int write_acked)
907 int tcode;
909 if (host->in_bus_reset) {
910 HPSB_INFO("received packet during reset; ignoring");
911 return;
914 dump_packet("received packet:", data, size);
916 tcode = (data[0] >> 4) & 0xf;
918 switch (tcode) {
919 case TCODE_WRITE_RESPONSE:
920 case TCODE_READQ_RESPONSE:
921 case TCODE_READB_RESPONSE:
922 case TCODE_LOCK_RESPONSE:
923 handle_packet_response(host, tcode, data, size);
924 break;
926 case TCODE_WRITEQ:
927 case TCODE_WRITEB:
928 case TCODE_READQ:
929 case TCODE_READB:
930 case TCODE_LOCK_REQUEST:
931 handle_incoming_packet(host, tcode, data, size, write_acked);
932 break;
935 case TCODE_ISO_DATA:
936 highlevel_iso_receive(host, data, size);
937 break;
939 case TCODE_CYCLE_START:
940 /* simply ignore this packet if it is passed on */
941 break;
943 default:
944 HPSB_NOTICE("received packet with bogus transaction code %d",
945 tcode);
946 break;
951 static void abort_requests(struct hpsb_host *host)
953 struct hpsb_packet *packet;
954 struct sk_buff *skb;
956 host->driver->devctl(host, CANCEL_REQUESTS, 0);
958 while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) {
959 packet = (struct hpsb_packet *)skb->data;
961 packet->state = hpsb_complete;
962 packet->ack_code = ACKX_ABORTED;
963 queue_packet_complete(packet);
967 void abort_timedouts(unsigned long __opaque)
969 struct hpsb_host *host = (struct hpsb_host *)__opaque;
970 unsigned long flags;
971 struct hpsb_packet *packet;
972 struct sk_buff *skb;
973 unsigned long expire;
975 spin_lock_irqsave(&host->csr.lock, flags);
976 expire = host->csr.expire;
977 spin_unlock_irqrestore(&host->csr.lock, flags);
979 /* Hold the lock around this, since we aren't dequeuing all
980 * packets, just ones we need. */
981 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
983 while (!skb_queue_empty(&host->pending_packet_queue)) {
984 skb = skb_peek(&host->pending_packet_queue);
986 packet = (struct hpsb_packet *)skb->data;
988 if (time_before(packet->sendtime + expire, jiffies)) {
989 __skb_unlink(skb, skb->list);
990 packet->state = hpsb_complete;
991 packet->ack_code = ACKX_TIMEOUT;
992 queue_packet_complete(packet);
993 } else {
994 /* Since packets are added to the tail, the oldest
995 * ones are first, always. When we get to one that
996 * isn't timed out, the rest aren't either. */
997 break;
1001 if (!skb_queue_empty(&host->pending_packet_queue))
1002 mod_timer(&host->timeout, jiffies + host->timeout_interval);
1004 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
1008 /* Kernel thread and vars, which handles packets that are completed. Only
1009 * packets that have a "complete" function are sent here. This way, the
1010 * completion is run out of kernel context, and doesn't block the rest of
1011 * the stack. */
1012 static int khpsbpkt_pid = -1, khpsbpkt_kill;
1013 static DECLARE_COMPLETION(khpsbpkt_complete);
1014 static struct sk_buff_head hpsbpkt_queue;
1015 static DECLARE_MUTEX_LOCKED(khpsbpkt_sig);
1018 static void queue_packet_complete(struct hpsb_packet *packet)
1020 if (packet->no_waiter) {
1021 hpsb_free_packet(packet);
1022 return;
1024 if (packet->complete_routine != NULL) {
1025 skb_queue_tail(&hpsbpkt_queue, packet->skb);
1027 /* Signal the kernel thread to handle this */
1028 up(&khpsbpkt_sig);
1030 return;
1033 static int hpsbpkt_thread(void *__hi)
1035 struct sk_buff *skb;
1036 struct hpsb_packet *packet;
1037 void (*complete_routine)(void*);
1038 void *complete_data;
1040 daemonize("khpsbpkt");
1042 while (1) {
1043 if (down_interruptible(&khpsbpkt_sig)) {
1044 if (current->flags & PF_FREEZE) {
1045 refrigerator(0);
1046 continue;
1048 printk("khpsbpkt: received unexpected signal?!\n" );
1049 break;
1052 if (khpsbpkt_kill)
1053 break;
1055 while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) {
1056 packet = (struct hpsb_packet *)skb->data;
1058 complete_routine = packet->complete_routine;
1059 complete_data = packet->complete_data;
1061 packet->complete_routine = packet->complete_data = NULL;
1063 complete_routine(complete_data);
1067 complete_and_exit(&khpsbpkt_complete, 0);
1070 static int __init ieee1394_init(void)
1072 int i, ret;
1074 skb_queue_head_init(&hpsbpkt_queue);
1076 /* non-fatal error */
1077 if (hpsb_init_config_roms()) {
1078 HPSB_ERR("Failed to initialize some config rom entries.\n");
1079 HPSB_ERR("Some features may not be available\n");
1082 khpsbpkt_pid = kernel_thread(hpsbpkt_thread, NULL, CLONE_KERNEL);
1083 if (khpsbpkt_pid < 0) {
1084 HPSB_ERR("Failed to start hpsbpkt thread!\n");
1085 ret = -ENOMEM;
1086 goto exit_cleanup_config_roms;
1089 if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) {
1090 HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR);
1091 ret = -ENODEV;
1092 goto exit_release_kernel_thread;
1095 /* actually this is a non-fatal error */
1096 ret = devfs_mk_dir("ieee1394");
1097 if (ret < 0) {
1098 HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR);
1099 goto release_chrdev;
1102 ret = bus_register(&ieee1394_bus_type);
1103 if (ret < 0) {
1104 HPSB_INFO("bus register failed");
1105 goto release_devfs;
1108 for (i = 0; fw_bus_attrs[i]; i++) {
1109 ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1110 if (ret < 0) {
1111 while (i >= 0) {
1112 bus_remove_file(&ieee1394_bus_type,
1113 fw_bus_attrs[i--]);
1115 bus_unregister(&ieee1394_bus_type);
1116 goto release_devfs;
1120 ret = class_register(&hpsb_host_class);
1121 if (ret < 0)
1122 goto release_all_bus;
1124 hpsb_protocol_class = class_simple_create(THIS_MODULE, "ieee1394_protocol");
1125 if (IS_ERR(hpsb_protocol_class)) {
1126 ret = PTR_ERR(hpsb_protocol_class);
1127 goto release_class_host;
1130 ret = init_csr();
1131 if (ret) {
1132 HPSB_INFO("init csr failed");
1133 ret = -ENOMEM;
1134 goto release_class_protocol;
1137 if (disable_nodemgr) {
1138 HPSB_INFO("nodemgr and IRM functionality disabled");
1139 /* We shouldn't contend for IRM with nodemgr disabled, since
1140 nodemgr implements functionality required of ieee1394a-2000
1141 IRMs */
1142 hpsb_disable_irm = 1;
1144 return 0;
1147 if (hpsb_disable_irm) {
1148 HPSB_INFO("IRM functionality disabled");
1151 ret = init_ieee1394_nodemgr();
1152 if (ret < 0) {
1153 HPSB_INFO("init nodemgr failed");
1154 goto cleanup_csr;
1157 return 0;
1159 cleanup_csr:
1160 cleanup_csr();
1161 release_class_protocol:
1162 class_simple_destroy(hpsb_protocol_class);
1163 release_class_host:
1164 class_unregister(&hpsb_host_class);
1165 release_all_bus:
1166 for (i = 0; fw_bus_attrs[i]; i++)
1167 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1168 bus_unregister(&ieee1394_bus_type);
1169 release_devfs:
1170 devfs_remove("ieee1394");
1171 release_chrdev:
1172 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1173 exit_release_kernel_thread:
1174 if (khpsbpkt_pid >= 0) {
1175 kill_proc(khpsbpkt_pid, SIGTERM, 1);
1176 wait_for_completion(&khpsbpkt_complete);
1178 exit_cleanup_config_roms:
1179 hpsb_cleanup_config_roms();
1180 return ret;
1183 static void __exit ieee1394_cleanup(void)
1185 int i;
1187 if (!disable_nodemgr)
1188 cleanup_ieee1394_nodemgr();
1190 cleanup_csr();
1192 class_simple_destroy(hpsb_protocol_class);
1193 class_unregister(&hpsb_host_class);
1194 for (i = 0; fw_bus_attrs[i]; i++)
1195 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1196 bus_unregister(&ieee1394_bus_type);
1198 if (khpsbpkt_pid >= 0) {
1199 khpsbpkt_kill = 1;
1200 mb();
1201 up(&khpsbpkt_sig);
1202 wait_for_completion(&khpsbpkt_complete);
1205 hpsb_cleanup_config_roms();
1207 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1208 devfs_remove("ieee1394");
1211 module_init(ieee1394_init);
1212 module_exit(ieee1394_cleanup);
1214 /* Exported symbols */
1216 /** hosts.c **/
1217 EXPORT_SYMBOL(hpsb_alloc_host);
1218 EXPORT_SYMBOL(hpsb_add_host);
1219 EXPORT_SYMBOL(hpsb_remove_host);
1220 EXPORT_SYMBOL(hpsb_update_config_rom_image);
1222 /** ieee1394_core.c **/
1223 EXPORT_SYMBOL(hpsb_speedto_str);
1224 EXPORT_SYMBOL(hpsb_protocol_class);
1225 EXPORT_SYMBOL(hpsb_set_packet_complete_task);
1226 EXPORT_SYMBOL(hpsb_alloc_packet);
1227 EXPORT_SYMBOL(hpsb_free_packet);
1228 EXPORT_SYMBOL(hpsb_send_phy_config);
1229 EXPORT_SYMBOL(hpsb_send_packet);
1230 EXPORT_SYMBOL(hpsb_send_packet_and_wait);
1231 EXPORT_SYMBOL(hpsb_reset_bus);
1232 EXPORT_SYMBOL(hpsb_bus_reset);
1233 EXPORT_SYMBOL(hpsb_selfid_received);
1234 EXPORT_SYMBOL(hpsb_selfid_complete);
1235 EXPORT_SYMBOL(hpsb_packet_sent);
1236 EXPORT_SYMBOL(hpsb_packet_received);
1237 EXPORT_SYMBOL_GPL(hpsb_disable_irm);
1239 /** ieee1394_transactions.c **/
1240 EXPORT_SYMBOL(hpsb_get_tlabel);
1241 EXPORT_SYMBOL(hpsb_free_tlabel);
1242 EXPORT_SYMBOL(hpsb_make_readpacket);
1243 EXPORT_SYMBOL(hpsb_make_writepacket);
1244 EXPORT_SYMBOL(hpsb_make_streampacket);
1245 EXPORT_SYMBOL(hpsb_make_lockpacket);
1246 EXPORT_SYMBOL(hpsb_make_lock64packet);
1247 EXPORT_SYMBOL(hpsb_make_phypacket);
1248 EXPORT_SYMBOL(hpsb_make_isopacket);
1249 EXPORT_SYMBOL(hpsb_read);
1250 EXPORT_SYMBOL(hpsb_write);
1251 EXPORT_SYMBOL(hpsb_packet_success);
1253 /** highlevel.c **/
1254 EXPORT_SYMBOL(hpsb_register_highlevel);
1255 EXPORT_SYMBOL(hpsb_unregister_highlevel);
1256 EXPORT_SYMBOL(hpsb_register_addrspace);
1257 EXPORT_SYMBOL(hpsb_unregister_addrspace);
1258 EXPORT_SYMBOL(hpsb_allocate_and_register_addrspace);
1259 EXPORT_SYMBOL(hpsb_listen_channel);
1260 EXPORT_SYMBOL(hpsb_unlisten_channel);
1261 EXPORT_SYMBOL(hpsb_get_hostinfo);
1262 EXPORT_SYMBOL(hpsb_create_hostinfo);
1263 EXPORT_SYMBOL(hpsb_destroy_hostinfo);
1264 EXPORT_SYMBOL(hpsb_set_hostinfo_key);
1265 EXPORT_SYMBOL(hpsb_get_hostinfo_bykey);
1266 EXPORT_SYMBOL(hpsb_set_hostinfo);
1267 EXPORT_SYMBOL(highlevel_add_host);
1268 EXPORT_SYMBOL(highlevel_remove_host);
1269 EXPORT_SYMBOL(highlevel_host_reset);
1271 /** nodemgr.c **/
1272 EXPORT_SYMBOL(hpsb_node_fill_packet);
1273 EXPORT_SYMBOL(hpsb_node_write);
1274 EXPORT_SYMBOL(hpsb_register_protocol);
1275 EXPORT_SYMBOL(hpsb_unregister_protocol);
1276 EXPORT_SYMBOL(ieee1394_bus_type);
1277 EXPORT_SYMBOL(nodemgr_for_each_host);
1279 /** csr.c **/
1280 EXPORT_SYMBOL(hpsb_update_config_rom);
1282 /** dma.c **/
1283 EXPORT_SYMBOL(dma_prog_region_init);
1284 EXPORT_SYMBOL(dma_prog_region_alloc);
1285 EXPORT_SYMBOL(dma_prog_region_free);
1286 EXPORT_SYMBOL(dma_region_init);
1287 EXPORT_SYMBOL(dma_region_alloc);
1288 EXPORT_SYMBOL(dma_region_free);
1289 EXPORT_SYMBOL(dma_region_sync_for_cpu);
1290 EXPORT_SYMBOL(dma_region_sync_for_device);
1291 EXPORT_SYMBOL(dma_region_mmap);
1292 EXPORT_SYMBOL(dma_region_offset_to_bus);
1294 /** iso.c **/
1295 EXPORT_SYMBOL(hpsb_iso_xmit_init);
1296 EXPORT_SYMBOL(hpsb_iso_recv_init);
1297 EXPORT_SYMBOL(hpsb_iso_xmit_start);
1298 EXPORT_SYMBOL(hpsb_iso_recv_start);
1299 EXPORT_SYMBOL(hpsb_iso_recv_listen_channel);
1300 EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel);
1301 EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask);
1302 EXPORT_SYMBOL(hpsb_iso_stop);
1303 EXPORT_SYMBOL(hpsb_iso_shutdown);
1304 EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet);
1305 EXPORT_SYMBOL(hpsb_iso_xmit_sync);
1306 EXPORT_SYMBOL(hpsb_iso_recv_release_packets);
1307 EXPORT_SYMBOL(hpsb_iso_n_ready);
1308 EXPORT_SYMBOL(hpsb_iso_packet_sent);
1309 EXPORT_SYMBOL(hpsb_iso_packet_received);
1310 EXPORT_SYMBOL(hpsb_iso_wake);
1311 EXPORT_SYMBOL(hpsb_iso_recv_flush);
1313 /** csr1212.c **/
1314 EXPORT_SYMBOL(csr1212_create_csr);
1315 EXPORT_SYMBOL(csr1212_init_local_csr);
1316 EXPORT_SYMBOL(csr1212_new_immediate);
1317 EXPORT_SYMBOL(csr1212_new_directory);
1318 EXPORT_SYMBOL(csr1212_associate_keyval);
1319 EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
1320 EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
1321 EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
1322 EXPORT_SYMBOL(csr1212_release_keyval);
1323 EXPORT_SYMBOL(csr1212_destroy_csr);
1324 EXPORT_SYMBOL(csr1212_read);
1325 EXPORT_SYMBOL(csr1212_generate_csr_image);
1326 EXPORT_SYMBOL(csr1212_parse_keyval);
1327 EXPORT_SYMBOL(csr1212_parse_csr);
1328 EXPORT_SYMBOL(_csr1212_read_keyval);
1329 EXPORT_SYMBOL(_csr1212_destroy_keyval);