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.
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/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"
43 #include "ieee1394_core.h"
44 #include "highlevel.h"
45 #include "ieee1394_transactions.h"
50 #include "config_roms.h"
53 * Disable the nodemgr detection and config rom reading functionality.
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)
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]);
84 for (i = 0; i < size; i++)
85 printk(" %08x", data[i]);
89 #define dump_packet(a,b,c,d)
92 static void abort_requests(struct hpsb_host *host);
93 static void queue_packet_complete(struct hpsb_packet *packet);
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
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
105 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
106 void (*routine)(void *), void *data)
108 WARN_ON(packet->complete_routine != NULL);
109 packet->complete_routine = routine;
110 packet->complete_data = data;
115 * hpsb_alloc_packet - allocate new packet structure
116 * @data_size: size of the data block to be allocated
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.
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.
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.
131 * Return value: A pointer to a &struct hpsb_packet or NULL on allocation
134 struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
136 struct hpsb_packet *packet = NULL;
139 data_size = ((data_size + 3) & ~3);
141 skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
145 memset(skb->data, 0, data_size + sizeof(*packet));
147 packet = (struct hpsb_packet *)skb->data;
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);
157 packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
158 packet->data_size = data_size;
166 * hpsb_free_packet - free packet and data associated with it
167 * @packet: packet to free (is NULL safe)
169 * This function will free packet->data and finally the packet itself.
171 void hpsb_free_packet(struct hpsb_packet *packet)
173 if (packet && atomic_dec_and_test(&packet->refcnt)) {
174 BUG_ON(!list_empty(&packet->driver_list));
175 kfree_skb(packet->skb);
180 int hpsb_reset_bus(struct hpsb_host *host, int type)
182 if (!host->in_bus_reset) {
183 host->driver->devctl(host, RESET_BUS, type);
191 int hpsb_bus_reset(struct hpsb_host *host)
193 if (host->in_bus_reset) {
194 HPSB_NOTICE("%s called while bus reset already in progress",
199 abort_requests(host);
200 host->in_bus_reset = 1;
203 host->busmgr_id = -1;
206 host->node_count = 0;
207 host->selfid_count = 0;
214 * Verify num_of_selfids SelfIDs and return number of nodes. Return zero in
215 * case verification failed.
217 static int check_selfids(struct hpsb_host *host)
220 int rest_of_selfids = host->selfid_count;
221 struct selfid *sid = (struct selfid *)host->topology_map;
222 struct ext_selfid *esid;
225 host->nodes_active = 0;
227 while (rest_of_selfids--) {
228 if (!sid->extended) {
232 if (sid->phy_id != nodeid) {
233 HPSB_INFO("SelfIDs failed monotony check with "
238 if (sid->link_active) {
239 host->nodes_active++;
241 host->irm_id = LOCAL_BUS | sid->phy_id;
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);
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 "
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");
282 host->node_count = nodeid + 1;
286 static void build_speed_map(struct hpsb_host *host, int nodecount)
288 u8 cldcnt[nodecount];
289 u8 *map = host->speed_map;
290 u8 *speedcap = host->speed;
292 struct ext_selfid *esid;
295 for (i = 0; i < (nodecount * 64); i += 64) {
296 for (j = 0; j < nodecount; j++) {
297 map[i+j] = IEEE1394_SPEED_MAX;
301 for (i = 0; i < nodecount; i++) {
305 /* find direct children count and speed */
306 for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
308 (void *)sid >= (void *)host->topology_map; sid--) {
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]++;
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;
330 /* set self mapping */
331 for (i = 0; i < nodecount; i++) {
332 map[64*i + i] = speedcap[i];
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]);
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]);
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]);
358 #if SELFID_SPEED_UNKNOWN != IEEE1394_SPEED_MAX
359 /* assume maximum speed for 1394b PHYs, nodemgr will correct it */
360 for (n = 0; n < nodecount; n++)
361 if (speedcap[n] == SELFID_SPEED_UNKNOWN)
362 speedcap[n] = IEEE1394_SPEED_MAX;
367 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
369 if (host->in_bus_reset) {
370 HPSB_VERBOSE("Including SelfID 0x%x", sid);
371 host->topology_map[host->selfid_count++] = sid;
373 HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
374 sid, NODEID_TO_BUS(host->node_id));
378 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
380 if (!host->in_bus_reset)
381 HPSB_NOTICE("SelfID completion called outside of bus reset!");
383 host->node_id = LOCAL_BUS | phyid;
384 host->is_root = isroot;
386 if (!check_selfids(host)) {
387 if (host->reset_retries++ < 20) {
388 /* selfid stage did not complete without error */
389 HPSB_NOTICE("Error in SelfID stage, resetting");
390 host->in_bus_reset = 0;
391 /* this should work from ohci1394 now... */
392 hpsb_reset_bus(host, LONG_RESET);
395 HPSB_NOTICE("Stopping out-of-control reset loop");
396 HPSB_NOTICE("Warning - topology map and speed map will not be valid");
397 host->reset_retries = 0;
400 host->reset_retries = 0;
401 build_speed_map(host, host->node_count);
404 HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
405 "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
407 /* irm_id is kept up to date by check_selfids() */
408 if (host->irm_id == host->node_id) {
416 host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
419 atomic_inc(&host->generation);
420 host->in_bus_reset = 0;
421 highlevel_host_reset(host);
425 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
430 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
432 packet->ack_code = ackcode;
434 if (packet->no_waiter || packet->state == hpsb_complete) {
435 /* if packet->no_waiter, must not have a tlabel allocated */
436 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
437 hpsb_free_packet(packet);
441 atomic_dec(&packet->refcnt); /* drop HC's reference */
442 /* here the packet must be on the host->pending_packet_queue */
444 if (ackcode != ACK_PENDING || !packet->expect_response) {
445 packet->state = hpsb_complete;
446 __skb_unlink(packet->skb, &host->pending_packet_queue);
447 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
448 queue_packet_complete(packet);
452 packet->state = hpsb_pending;
453 packet->sendtime = jiffies;
455 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
457 mod_timer(&host->timeout, jiffies + host->timeout_interval);
461 * hpsb_send_phy_config - transmit a PHY configuration packet on the bus
462 * @host: host that PHY config packet gets sent through
463 * @rootid: root whose force_root bit should get set (-1 = don't set force_root)
464 * @gapcnt: gap count value to set (-1 = don't set gap count)
466 * This function sends a PHY config packet on the bus through the specified host.
468 * Return value: 0 for success or error number otherwise.
470 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
472 struct hpsb_packet *packet;
476 if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
477 (rootid == -1 && gapcnt == -1)) {
478 HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d",
484 d |= PHYPACKET_PHYCONFIG_R | rootid << PHYPACKET_PORT_SHIFT;
486 d |= PHYPACKET_PHYCONFIG_T | gapcnt << PHYPACKET_GAPCOUNT_SHIFT;
488 packet = hpsb_make_phypacket(host, d);
492 packet->generation = get_hpsb_generation(host);
493 retval = hpsb_send_packet_and_wait(packet);
494 hpsb_free_packet(packet);
500 * hpsb_send_packet - transmit a packet on the bus
501 * @packet: packet to send
503 * The packet is sent through the host specified in the packet->host field.
504 * Before sending, the packet's transmit speed is automatically determined
505 * using the local speed map when it is an async, non-broadcast packet.
507 * Possibilities for failure are that host is either not initialized, in bus
508 * reset, the packet's generation number doesn't match the current generation
509 * number or the host reports a transmit error.
511 * Return value: 0 on success, negative errno on failure.
513 int hpsb_send_packet(struct hpsb_packet *packet)
515 struct hpsb_host *host = packet->host;
517 if (host->is_shutdown)
519 if (host->in_bus_reset ||
520 (packet->generation != get_hpsb_generation(host)))
523 packet->state = hpsb_queued;
525 /* This just seems silly to me */
526 WARN_ON(packet->no_waiter && packet->expect_response);
528 if (!packet->no_waiter || packet->expect_response) {
529 atomic_inc(&packet->refcnt);
530 /* Set the initial "sendtime" to 10 seconds from now, to
531 prevent premature expiry. If a packet takes more than
532 10 seconds to hit the wire, we have bigger problems :) */
533 packet->sendtime = jiffies + 10 * HZ;
534 skb_queue_tail(&host->pending_packet_queue, packet->skb);
537 if (packet->node_id == host->node_id) {
538 /* it is a local request, so handle it locally */
541 size_t size = packet->data_size + packet->header_size;
543 data = kmalloc(size, GFP_ATOMIC);
545 HPSB_ERR("unable to allocate memory for concatenating header and data");
549 memcpy(data, packet->header, packet->header_size);
551 if (packet->data_size)
552 memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size);
554 dump_packet("send packet local", packet->header, packet->header_size, -1);
556 hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE);
557 hpsb_packet_received(host, data, size, 0);
564 if (packet->type == hpsb_async &&
565 NODEID_TO_NODE(packet->node_id) != ALL_NODES)
567 host->speed[NODEID_TO_NODE(packet->node_id)];
569 dump_packet("send packet", packet->header, packet->header_size, packet->speed_code);
571 return host->driver->transmit_packet(host, packet);
574 /* We could just use complete() directly as the packet complete
575 * callback, but this is more typesafe, in the sense that we get a
576 * compiler error if the prototype for complete() changes. */
578 static void complete_packet(void *data)
580 complete((struct completion *) data);
583 int hpsb_send_packet_and_wait(struct hpsb_packet *packet)
585 struct completion done;
588 init_completion(&done);
589 hpsb_set_packet_complete_task(packet, complete_packet, &done);
590 retval = hpsb_send_packet(packet);
592 wait_for_completion(&done);
597 static void send_packet_nocare(struct hpsb_packet *packet)
599 if (hpsb_send_packet(packet) < 0) {
600 hpsb_free_packet(packet);
605 static void handle_packet_response(struct hpsb_host *host, int tcode,
606 quadlet_t *data, size_t size)
608 struct hpsb_packet *packet = NULL;
614 tlabel = (data[0] >> 10) & 0x3f;
616 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
618 skb_queue_walk(&host->pending_packet_queue, skb) {
619 packet = (struct hpsb_packet *)skb->data;
620 if ((packet->tlabel == tlabel)
621 && (packet->node_id == (data[1] >> 16))){
628 if (packet == NULL) {
629 HPSB_DEBUG("unsolicited response packet received - no tlabel match");
630 dump_packet("contents", data, 16, -1);
631 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
635 switch (packet->tcode) {
638 if (tcode != TCODE_WRITE_RESPONSE)
641 memcpy(packet->header, data, 12);
644 if (tcode != TCODE_READQ_RESPONSE)
647 memcpy(packet->header, data, 16);
650 if (tcode != TCODE_READB_RESPONSE)
653 BUG_ON(packet->skb->len - sizeof(*packet) < size - 16);
654 memcpy(packet->header, data, 16);
655 memcpy(packet->data, data + 4, size - 16);
657 case TCODE_LOCK_REQUEST:
658 if (tcode != TCODE_LOCK_RESPONSE)
661 size = min((size - 16), (size_t)8);
662 BUG_ON(packet->skb->len - sizeof(*packet) < size);
663 memcpy(packet->header, data, 16);
664 memcpy(packet->data, data + 4, size);
669 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
670 HPSB_INFO("unsolicited response packet received - tcode mismatch");
671 dump_packet("contents", data, 16, -1);
675 __skb_unlink(skb, &host->pending_packet_queue);
677 if (packet->state == hpsb_queued) {
678 packet->sendtime = jiffies;
679 packet->ack_code = ACK_PENDING;
682 packet->state = hpsb_complete;
683 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
685 queue_packet_complete(packet);
689 static struct hpsb_packet *create_reply_packet(struct hpsb_host *host,
690 quadlet_t *data, size_t dsize)
692 struct hpsb_packet *p;
694 p = hpsb_alloc_packet(dsize);
695 if (unlikely(p == NULL)) {
696 /* FIXME - send data_error response */
700 p->type = hpsb_async;
701 p->state = hpsb_unused;
703 p->node_id = data[1] >> 16;
704 p->tlabel = (data[0] >> 10) & 0x3f;
707 p->generation = get_hpsb_generation(host);
710 p->data[dsize / 4] = 0;
715 #define PREP_ASYNC_HEAD_RCODE(tc) \
716 packet->tcode = tc; \
717 packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
718 | (1 << 8) | (tc << 4); \
719 packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \
720 packet->header[2] = 0
722 static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode,
725 PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE);
726 packet->header[3] = data;
727 packet->header_size = 16;
728 packet->data_size = 0;
731 static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode,
734 if (rcode != RCODE_COMPLETE)
737 PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE);
738 packet->header[3] = length << 16;
739 packet->header_size = 16;
740 packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
743 static void fill_async_write_resp(struct hpsb_packet *packet, int rcode)
745 PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE);
746 packet->header[2] = 0;
747 packet->header_size = 12;
748 packet->data_size = 0;
751 static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode,
754 if (rcode != RCODE_COMPLETE)
757 PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE);
758 packet->header[3] = (length << 16) | extcode;
759 packet->header_size = 16;
760 packet->data_size = length;
763 #define PREP_REPLY_PACKET(length) \
764 packet = create_reply_packet(host, data, length); \
765 if (packet == NULL) break
767 static void handle_incoming_packet(struct hpsb_host *host, int tcode,
768 quadlet_t *data, size_t size, int write_acked)
770 struct hpsb_packet *packet;
771 int length, rcode, extcode;
773 nodeid_t source = data[1] >> 16;
774 nodeid_t dest = data[0] >> 16;
775 u16 flags = (u16) data[0];
778 /* big FIXME - no error checking is done for an out of bounds length */
782 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
783 rcode = highlevel_write(host, source, dest, data+3,
787 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
789 /* not a broadcast write, reply */
790 PREP_REPLY_PACKET(0);
791 fill_async_write_resp(packet, rcode);
792 send_packet_nocare(packet);
797 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
798 rcode = highlevel_write(host, source, dest, data+4,
799 addr, data[3]>>16, flags);
802 && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
804 /* not a broadcast write, reply */
805 PREP_REPLY_PACKET(0);
806 fill_async_write_resp(packet, rcode);
807 send_packet_nocare(packet);
812 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
813 rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
816 PREP_REPLY_PACKET(0);
817 fill_async_readquad_resp(packet, rcode, buffer);
818 send_packet_nocare(packet);
823 length = data[3] >> 16;
824 PREP_REPLY_PACKET(length);
826 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
827 rcode = highlevel_read(host, source, packet->data, addr,
831 fill_async_readblock_resp(packet, rcode, length);
832 send_packet_nocare(packet);
834 hpsb_free_packet(packet);
838 case TCODE_LOCK_REQUEST:
839 length = data[3] >> 16;
840 extcode = data[3] & 0xffff;
841 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
843 PREP_REPLY_PACKET(8);
845 if ((extcode == 0) || (extcode >= 7)) {
846 /* let switch default handle error */
852 rcode = highlevel_lock(host, source, packet->data, addr,
853 data[4], 0, extcode,flags);
854 fill_async_lock_resp(packet, rcode, extcode, 4);
857 if ((extcode != EXTCODE_FETCH_ADD)
858 && (extcode != EXTCODE_LITTLE_ADD)) {
859 rcode = highlevel_lock(host, source,
863 fill_async_lock_resp(packet, rcode, extcode, 4);
865 rcode = highlevel_lock64(host, source,
866 (octlet_t *)packet->data, addr,
867 *(octlet_t *)(data + 4), 0ULL,
869 fill_async_lock_resp(packet, rcode, extcode, 8);
873 rcode = highlevel_lock64(host, source,
874 (octlet_t *)packet->data, addr,
875 *(octlet_t *)(data + 6),
876 *(octlet_t *)(data + 4),
878 fill_async_lock_resp(packet, rcode, extcode, 8);
881 rcode = RCODE_TYPE_ERROR;
882 fill_async_lock_resp(packet, rcode,
887 send_packet_nocare(packet);
889 hpsb_free_packet(packet);
895 #undef PREP_REPLY_PACKET
898 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
903 if (host->in_bus_reset) {
904 HPSB_INFO("received packet during reset; ignoring");
908 dump_packet("received packet", data, size, -1);
910 tcode = (data[0] >> 4) & 0xf;
913 case TCODE_WRITE_RESPONSE:
914 case TCODE_READQ_RESPONSE:
915 case TCODE_READB_RESPONSE:
916 case TCODE_LOCK_RESPONSE:
917 handle_packet_response(host, tcode, data, size);
924 case TCODE_LOCK_REQUEST:
925 handle_incoming_packet(host, tcode, data, size, write_acked);
930 highlevel_iso_receive(host, data, size);
933 case TCODE_CYCLE_START:
934 /* simply ignore this packet if it is passed on */
938 HPSB_NOTICE("received packet with bogus transaction code %d",
945 static void abort_requests(struct hpsb_host *host)
947 struct hpsb_packet *packet;
950 host->driver->devctl(host, CANCEL_REQUESTS, 0);
952 while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) {
953 packet = (struct hpsb_packet *)skb->data;
955 packet->state = hpsb_complete;
956 packet->ack_code = ACKX_ABORTED;
957 queue_packet_complete(packet);
961 void abort_timedouts(unsigned long __opaque)
963 struct hpsb_host *host = (struct hpsb_host *)__opaque;
965 struct hpsb_packet *packet;
967 unsigned long expire;
969 spin_lock_irqsave(&host->csr.lock, flags);
970 expire = host->csr.expire;
971 spin_unlock_irqrestore(&host->csr.lock, flags);
973 /* Hold the lock around this, since we aren't dequeuing all
974 * packets, just ones we need. */
975 spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
977 while (!skb_queue_empty(&host->pending_packet_queue)) {
978 skb = skb_peek(&host->pending_packet_queue);
980 packet = (struct hpsb_packet *)skb->data;
982 if (time_before(packet->sendtime + expire, jiffies)) {
983 __skb_unlink(skb, &host->pending_packet_queue);
984 packet->state = hpsb_complete;
985 packet->ack_code = ACKX_TIMEOUT;
986 queue_packet_complete(packet);
988 /* Since packets are added to the tail, the oldest
989 * ones are first, always. When we get to one that
990 * isn't timed out, the rest aren't either. */
995 if (!skb_queue_empty(&host->pending_packet_queue))
996 mod_timer(&host->timeout, jiffies + host->timeout_interval);
998 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
1002 /* Kernel thread and vars, which handles packets that are completed. Only
1003 * packets that have a "complete" function are sent here. This way, the
1004 * completion is run out of kernel context, and doesn't block the rest of
1006 static struct task_struct *khpsbpkt_thread;
1007 static struct sk_buff_head hpsbpkt_queue;
1009 static void queue_packet_complete(struct hpsb_packet *packet)
1011 if (packet->no_waiter) {
1012 hpsb_free_packet(packet);
1015 if (packet->complete_routine != NULL) {
1016 skb_queue_tail(&hpsbpkt_queue, packet->skb);
1017 wake_up_process(khpsbpkt_thread);
1022 static int hpsbpkt_thread(void *__hi)
1024 struct sk_buff *skb;
1025 struct hpsb_packet *packet;
1026 void (*complete_routine)(void*);
1027 void *complete_data;
1029 current->flags |= PF_NOFREEZE;
1031 while (!kthread_should_stop()) {
1032 while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) {
1033 packet = (struct hpsb_packet *)skb->data;
1035 complete_routine = packet->complete_routine;
1036 complete_data = packet->complete_data;
1038 packet->complete_routine = packet->complete_data = NULL;
1040 complete_routine(complete_data);
1043 set_current_state(TASK_INTERRUPTIBLE);
1044 if (!skb_peek(&hpsbpkt_queue))
1046 __set_current_state(TASK_RUNNING);
1051 static int __init ieee1394_init(void)
1055 skb_queue_head_init(&hpsbpkt_queue);
1057 /* non-fatal error */
1058 if (hpsb_init_config_roms()) {
1059 HPSB_ERR("Failed to initialize some config rom entries.\n");
1060 HPSB_ERR("Some features may not be available\n");
1063 khpsbpkt_thread = kthread_run(hpsbpkt_thread, NULL, "khpsbpkt");
1064 if (IS_ERR(khpsbpkt_thread)) {
1065 HPSB_ERR("Failed to start hpsbpkt thread!\n");
1066 ret = PTR_ERR(khpsbpkt_thread);
1067 goto exit_cleanup_config_roms;
1070 if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) {
1071 HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR);
1073 goto exit_release_kernel_thread;
1076 ret = bus_register(&ieee1394_bus_type);
1078 HPSB_INFO("bus register failed");
1079 goto release_chrdev;
1082 for (i = 0; fw_bus_attrs[i]; i++) {
1083 ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1086 bus_remove_file(&ieee1394_bus_type,
1089 bus_unregister(&ieee1394_bus_type);
1090 goto release_chrdev;
1094 ret = class_register(&hpsb_host_class);
1096 goto release_all_bus;
1098 hpsb_protocol_class = class_create(THIS_MODULE, "ieee1394_protocol");
1099 if (IS_ERR(hpsb_protocol_class)) {
1100 ret = PTR_ERR(hpsb_protocol_class);
1101 goto release_class_host;
1106 HPSB_INFO("init csr failed");
1108 goto release_class_protocol;
1111 if (disable_nodemgr) {
1112 HPSB_INFO("nodemgr and IRM functionality disabled");
1113 /* We shouldn't contend for IRM with nodemgr disabled, since
1114 nodemgr implements functionality required of ieee1394a-2000
1116 hpsb_disable_irm = 1;
1121 if (hpsb_disable_irm) {
1122 HPSB_INFO("IRM functionality disabled");
1125 ret = init_ieee1394_nodemgr();
1127 HPSB_INFO("init nodemgr failed");
1135 release_class_protocol:
1136 class_destroy(hpsb_protocol_class);
1138 class_unregister(&hpsb_host_class);
1140 for (i = 0; fw_bus_attrs[i]; i++)
1141 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1142 bus_unregister(&ieee1394_bus_type);
1144 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1145 exit_release_kernel_thread:
1146 kthread_stop(khpsbpkt_thread);
1147 exit_cleanup_config_roms:
1148 hpsb_cleanup_config_roms();
1152 static void __exit ieee1394_cleanup(void)
1156 if (!disable_nodemgr)
1157 cleanup_ieee1394_nodemgr();
1161 class_destroy(hpsb_protocol_class);
1162 class_unregister(&hpsb_host_class);
1163 for (i = 0; fw_bus_attrs[i]; i++)
1164 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1165 bus_unregister(&ieee1394_bus_type);
1167 kthread_stop(khpsbpkt_thread);
1169 hpsb_cleanup_config_roms();
1171 unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1174 module_init(ieee1394_init);
1175 module_exit(ieee1394_cleanup);
1177 /* Exported symbols */
1180 EXPORT_SYMBOL(hpsb_alloc_host);
1181 EXPORT_SYMBOL(hpsb_add_host);
1182 EXPORT_SYMBOL(hpsb_remove_host);
1183 EXPORT_SYMBOL(hpsb_update_config_rom_image);
1185 /** ieee1394_core.c **/
1186 EXPORT_SYMBOL(hpsb_speedto_str);
1187 EXPORT_SYMBOL(hpsb_protocol_class);
1188 EXPORT_SYMBOL(hpsb_set_packet_complete_task);
1189 EXPORT_SYMBOL(hpsb_alloc_packet);
1190 EXPORT_SYMBOL(hpsb_free_packet);
1191 EXPORT_SYMBOL(hpsb_send_packet);
1192 EXPORT_SYMBOL(hpsb_reset_bus);
1193 EXPORT_SYMBOL(hpsb_bus_reset);
1194 EXPORT_SYMBOL(hpsb_selfid_received);
1195 EXPORT_SYMBOL(hpsb_selfid_complete);
1196 EXPORT_SYMBOL(hpsb_packet_sent);
1197 EXPORT_SYMBOL(hpsb_packet_received);
1198 EXPORT_SYMBOL_GPL(hpsb_disable_irm);
1199 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1200 EXPORT_SYMBOL(hpsb_send_phy_config);
1201 EXPORT_SYMBOL(hpsb_send_packet_and_wait);
1204 /** ieee1394_transactions.c **/
1205 EXPORT_SYMBOL(hpsb_get_tlabel);
1206 EXPORT_SYMBOL(hpsb_free_tlabel);
1207 EXPORT_SYMBOL(hpsb_make_readpacket);
1208 EXPORT_SYMBOL(hpsb_make_writepacket);
1209 EXPORT_SYMBOL(hpsb_make_streampacket);
1210 EXPORT_SYMBOL(hpsb_make_lockpacket);
1211 EXPORT_SYMBOL(hpsb_make_lock64packet);
1212 EXPORT_SYMBOL(hpsb_make_phypacket);
1213 EXPORT_SYMBOL(hpsb_make_isopacket);
1214 EXPORT_SYMBOL(hpsb_read);
1215 EXPORT_SYMBOL(hpsb_write);
1216 EXPORT_SYMBOL(hpsb_packet_success);
1219 EXPORT_SYMBOL(hpsb_register_highlevel);
1220 EXPORT_SYMBOL(hpsb_unregister_highlevel);
1221 EXPORT_SYMBOL(hpsb_register_addrspace);
1222 EXPORT_SYMBOL(hpsb_unregister_addrspace);
1223 EXPORT_SYMBOL(hpsb_allocate_and_register_addrspace);
1224 EXPORT_SYMBOL(hpsb_listen_channel);
1225 EXPORT_SYMBOL(hpsb_unlisten_channel);
1226 EXPORT_SYMBOL(hpsb_get_hostinfo);
1227 EXPORT_SYMBOL(hpsb_create_hostinfo);
1228 EXPORT_SYMBOL(hpsb_destroy_hostinfo);
1229 EXPORT_SYMBOL(hpsb_set_hostinfo_key);
1230 EXPORT_SYMBOL(hpsb_get_hostinfo_bykey);
1231 EXPORT_SYMBOL(hpsb_set_hostinfo);
1232 EXPORT_SYMBOL(highlevel_host_reset);
1233 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1234 EXPORT_SYMBOL(highlevel_add_host);
1235 EXPORT_SYMBOL(highlevel_remove_host);
1239 EXPORT_SYMBOL(hpsb_node_fill_packet);
1240 EXPORT_SYMBOL(hpsb_node_write);
1241 EXPORT_SYMBOL(hpsb_register_protocol);
1242 EXPORT_SYMBOL(hpsb_unregister_protocol);
1243 EXPORT_SYMBOL(ieee1394_bus_type);
1244 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1245 EXPORT_SYMBOL(nodemgr_for_each_host);
1249 EXPORT_SYMBOL(hpsb_update_config_rom);
1252 EXPORT_SYMBOL(dma_prog_region_init);
1253 EXPORT_SYMBOL(dma_prog_region_alloc);
1254 EXPORT_SYMBOL(dma_prog_region_free);
1255 EXPORT_SYMBOL(dma_region_init);
1256 EXPORT_SYMBOL(dma_region_alloc);
1257 EXPORT_SYMBOL(dma_region_free);
1258 EXPORT_SYMBOL(dma_region_sync_for_cpu);
1259 EXPORT_SYMBOL(dma_region_sync_for_device);
1260 EXPORT_SYMBOL(dma_region_mmap);
1261 EXPORT_SYMBOL(dma_region_offset_to_bus);
1264 EXPORT_SYMBOL(hpsb_iso_xmit_init);
1265 EXPORT_SYMBOL(hpsb_iso_recv_init);
1266 EXPORT_SYMBOL(hpsb_iso_xmit_start);
1267 EXPORT_SYMBOL(hpsb_iso_recv_start);
1268 EXPORT_SYMBOL(hpsb_iso_recv_listen_channel);
1269 EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel);
1270 EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask);
1271 EXPORT_SYMBOL(hpsb_iso_stop);
1272 EXPORT_SYMBOL(hpsb_iso_shutdown);
1273 EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet);
1274 EXPORT_SYMBOL(hpsb_iso_xmit_sync);
1275 EXPORT_SYMBOL(hpsb_iso_recv_release_packets);
1276 EXPORT_SYMBOL(hpsb_iso_n_ready);
1277 EXPORT_SYMBOL(hpsb_iso_packet_sent);
1278 EXPORT_SYMBOL(hpsb_iso_packet_received);
1279 EXPORT_SYMBOL(hpsb_iso_wake);
1280 EXPORT_SYMBOL(hpsb_iso_recv_flush);
1283 EXPORT_SYMBOL(csr1212_new_directory);
1284 EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
1285 EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
1286 EXPORT_SYMBOL(csr1212_release_keyval);
1287 EXPORT_SYMBOL(csr1212_read);
1288 EXPORT_SYMBOL(csr1212_parse_keyval);
1289 EXPORT_SYMBOL(_csr1212_read_keyval);
1290 EXPORT_SYMBOL(_csr1212_destroy_keyval);
1291 #ifdef CONFIG_IEEE1394_EXPORT_FULL_API
1292 EXPORT_SYMBOL(csr1212_create_csr);
1293 EXPORT_SYMBOL(csr1212_init_local_csr);
1294 EXPORT_SYMBOL(csr1212_new_immediate);
1295 EXPORT_SYMBOL(csr1212_associate_keyval);
1296 EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
1297 EXPORT_SYMBOL(csr1212_destroy_csr);
1298 EXPORT_SYMBOL(csr1212_generate_csr_image);
1299 EXPORT_SYMBOL(csr1212_parse_csr);