drivers/ieee1394/ieee1394_core.c

   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  */
  22
  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
  36 #include <asm/byteorder.h>
  37 #include <asm/semaphore.h>
  38
  39 #include "ieee1394_types.h"
  40 #include "ieee1394.h"
  41 #include "hosts.h"
  42 #include "ieee1394_core.h"
  43 #include "highlevel.h"
  44 #include "ieee1394_transactions.h"
  45 #include "csr.h"
  46 #include "nodemgr.h"
  47 #include "dma.h"
  48 #include "iso.h"
  49 #include "config_roms.h"
  50
  51 /*
  52  * Disable the nodemgr detection and config rom reading functionality.
  53  */
  54 static int disable_nodemgr = 0;
  55 module_param(disable_nodemgr, int, 0444);
  56 MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality.");
  57
  58 /* We are GPL, so treat us special */
  59 MODULE_LICENSE("GPL");
  60
  61 /* Some globals used */
  62 const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" };
  63
  64 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
  65 static void dump_packet(const char *text, quadlet_t *data, int size)
  66 {
  67         int i;
  68
  69         size /= 4;
  70         size = (size > 4 ? 4 : size);
  71
  72         printk(KERN_DEBUG "ieee1394: %s", text);
  73         for (i = 0; i < size; i++)
  74                 printk(" %08x", data[i]);
  75         printk("\n");
  76 }
  77 #else
  78 #define dump_packet(x,y,z)
  79 #endif
  80
  81 static void queue_packet_complete(struct hpsb_packet *packet);
  82
  83
  84 /**
  85  * hpsb_set_packet_complete_task - set the task that runs when a packet
  86  * completes. You cannot call this more than once on a single packet
  87  * before it is sent.
  88  *
  89  * @packet: the packet whose completion we want the task added to
  90  * @routine: function to call
  91  * @data: data (if any) to pass to the above function
  92  */
  93 void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
  94                                    void (*routine)(void *), void *data)
  95 {
  96         WARN_ON(packet->complete_routine != NULL);
  97         packet->complete_routine = routine;
  98         packet->complete_data = data;
  99         return;
 100 }
 101
 102 /**
 103  * hpsb_alloc_packet - allocate new packet structure
 104  * @data_size: size of the data block to be allocated
 105  *
 106  * This function allocates, initializes and returns a new &struct hpsb_packet.
 107  * It can be used in interrupt context.  A header block is always included, its
 108  * size is big enough to contain all possible 1394 headers.  The data block is
 109  * only allocated when @data_size is not zero.
 110  *
 111  * For packets for which responses will be received the @data_size has to be big
 112  * enough to contain the response's data block since no further allocation
 113  * occurs at response matching time.
 114  *
 115  * The packet's generation value will be set to the current generation number
 116  * for ease of use.  Remember to overwrite it with your own recorded generation
 117  * number if you can not be sure that your code will not race with a bus reset.
 118  *
 119  * Return value: A pointer to a &struct hpsb_packet or NULL on allocation
 120  * failure.
 121  */
 122 struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
 123 {
 124         struct hpsb_packet *packet = NULL;
 125         struct sk_buff *skb;
 126
 127         data_size = ((data_size + 3) & ~3);
 128
 129         skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
 130         if (skb == NULL)
 131                 return NULL;
 132
 133         memset(skb->data, 0, data_size + sizeof(*packet));
 134
 135         packet = (struct hpsb_packet *)skb->data;
 136         packet->skb = skb;
 137
 138         packet->header = packet->embedded_header;
 139         packet->state = hpsb_unused;
 140         packet->generation = -1;
 141         INIT_LIST_HEAD(&packet->driver_list);
 142         atomic_set(&packet->refcnt, 1);
 143
 144         if (data_size) {
 145                 packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
 146                 packet->data_size = data_size;
 147         }
 148
 149         return packet;
 150 }
 151
 152
 153 /**
 154  * hpsb_free_packet - free packet and data associated with it
 155  * @packet: packet to free (is NULL safe)
 156  *
 157  * This function will free packet->data and finally the packet itself.
 158  */
 159 void hpsb_free_packet(struct hpsb_packet *packet)
 160 {
 161         if (packet && atomic_dec_and_test(&packet->refcnt)) {
 162                 BUG_ON(!list_empty(&packet->driver_list));
 163                 kfree_skb(packet->skb);
 164         }
 165 }
 166
 167
 168 int hpsb_reset_bus(struct hpsb_host *host, int type)
 169 {
 170         if (!host->in_bus_reset) {
 171                 host->driver->devctl(host, RESET_BUS, type);
 172                 return 0;
 173         } else {
 174                 return 1;
 175         }
 176 }
 177
 178
 179 int hpsb_bus_reset(struct hpsb_host *host)
 180 {
 181         if (host->in_bus_reset) {
 182                 HPSB_NOTICE("%s called while bus reset already in progress",
 183                             __FUNCTION__);
 184                 return 1;
 185         }
 186
 187         abort_requests(host);
 188         host->in_bus_reset = 1;
 189         host->irm_id = -1;
 190         host->is_irm = 0;
 191         host->busmgr_id = -1;
 192         host->is_busmgr = 0;
 193         host->is_cycmst = 0;
 194         host->node_count = 0;
 195         host->selfid_count = 0;
 196
 197         return 0;
 198 }
 199
 200
 201 /*
 202  * Verify num_of_selfids SelfIDs and return number of nodes.  Return zero in
 203  * case verification failed.
 204  */
 205 static int check_selfids(struct hpsb_host *host)
 206 {
 207         int nodeid = -1;
 208         int rest_of_selfids = host->selfid_count;
 209         struct selfid *sid = (struct selfid *)host->topology_map;
 210         struct ext_selfid *esid;
 211         int esid_seq = 23;
 212
 213         host->nodes_active = 0;
 214
 215         while (rest_of_selfids--) {
 216                 if (!sid->extended) {
 217                         nodeid++;
 218                         esid_seq = 0;
 219
 220                         if (sid->phy_id != nodeid) {
 221                                 HPSB_INFO("SelfIDs failed monotony check with "
 222                                           "%d", sid->phy_id);
 223                                 return 0;
 224                         }
 225
 226                         if (sid->link_active) {
 227                                 host->nodes_active++;
 228                                 if (sid->contender)
 229                                         host->irm_id = LOCAL_BUS | sid->phy_id;
 230                         }
 231                 } else {
 232                         esid = (struct ext_selfid *)sid;
 233
 234                         if ((esid->phy_id != nodeid)
 235                             || (esid->seq_nr != esid_seq)) {
 236                                 HPSB_INFO("SelfIDs failed monotony check with "
 237                                           "%d/%d", esid->phy_id, esid->seq_nr);
 238                                 return 0;
 239                         }
 240                         esid_seq++;
 241                 }
 242                 sid++;
 243         }
 244
 245         esid = (struct ext_selfid *)(sid - 1);
 246         while (esid->extended) {
 247                 if ((esid->porta == 0x2) || (esid->portb == 0x2)
 248                     || (esid->portc == 0x2) || (esid->portd == 0x2)
 249                     || (esid->porte == 0x2) || (esid->portf == 0x2)
 250                     || (esid->portg == 0x2) || (esid->porth == 0x2)) {
 251                         HPSB_INFO("SelfIDs failed root check on "
 252                                   "extended SelfID");
 253                         return 0;
 254                 }
 255                 esid--;
 256         }
 257
 258         sid = (struct selfid *)esid;
 259         if ((sid->port0 == 0x2) || (sid->port1 == 0x2) || (sid->port2 == 0x2)) {
 260                 HPSB_INFO("SelfIDs failed root check");
 261                 return 0;
 262         }
 263
 264         host->node_count = nodeid + 1;
 265         return 1;
 266 }
 267
 268 static void build_speed_map(struct hpsb_host *host, int nodecount)
 269 {
 270         u8 speedcap[nodecount];
 271         u8 cldcnt[nodecount];
 272         u8 *map = host->speed_map;
 273         struct selfid *sid;
 274         struct ext_selfid *esid;
 275         int i, j, n;
 276
 277         for (i = 0; i < (nodecount * 64); i += 64) {
 278                 for (j = 0; j < nodecount; j++) {
 279                         map[i+j] = IEEE1394_SPEED_MAX;
 280                 }
 281         }
 282
 283         for (i = 0; i < nodecount; i++) {
 284                 cldcnt[i] = 0;
 285         }
 286
 287         /* find direct children count and speed */
 288         for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
 289                      n = nodecount - 1;
 290              (void *)sid >= (void *)host->topology_map; sid--) {
 291                 if (sid->extended) {
 292                         esid = (struct ext_selfid *)sid;
 293
 294                         if (esid->porta == 0x3) cldcnt[n]++;
 295                         if (esid->portb == 0x3) cldcnt[n]++;
 296                         if (esid->portc == 0x3) cldcnt[n]++;
 297                         if (esid->portd == 0x3) cldcnt[n]++;
 298                         if (esid->porte == 0x3) cldcnt[n]++;
 299                         if (esid->portf == 0x3) cldcnt[n]++;
 300                         if (esid->portg == 0x3) cldcnt[n]++;
 301                         if (esid->porth == 0x3) cldcnt[n]++;
 302                 } else {
 303                         if (sid->port0 == 0x3) cldcnt[n]++;
 304                         if (sid->port1 == 0x3) cldcnt[n]++;
 305                         if (sid->port2 == 0x3) cldcnt[n]++;
 306
 307                         speedcap[n] = sid->speed;
 308                         n--;
 309                 }
 310         }
 311
 312         /* set self mapping */
 313         for (i = 0; i < nodecount; i++) {
 314                 map[64*i + i] = speedcap[i];
 315         }
 316
 317         /* fix up direct children count to total children count;
 318          * also fix up speedcaps for sibling and parent communication */
 319         for (i = 1; i < nodecount; i++) {
 320                 for (j = cldcnt[i], n = i - 1; j > 0; j--) {
 321                         cldcnt[i] += cldcnt[n];
 322                         speedcap[n] = min(speedcap[n], speedcap[i]);
 323                         n -= cldcnt[n] + 1;
 324                 }
 325         }
 326
 327         for (n = 0; n < nodecount; n++) {
 328                 for (i = n - cldcnt[n]; i <= n; i++) {
 329                         for (j = 0; j < (n - cldcnt[n]); j++) {
 330                                 map[j*64 + i] = map[i*64 + j] =
 331                                         min(map[i*64 + j], speedcap[n]);
 332                         }
 333                         for (j = n + 1; j < nodecount; j++) {
 334                                 map[j*64 + i] = map[i*64 + j] =
 335                                         min(map[i*64 + j], speedcap[n]);
 336                         }
 337                 }
 338         }
 339 }
 340
 341
 342 void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
 343 {
 344         if (host->in_bus_reset) {
 345                 HPSB_VERBOSE("Including SelfID 0x%x", sid);
 346                 host->topology_map[host->selfid_count++] = sid;
 347         } else {
 348                 HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
 349                             sid, NODEID_TO_BUS(host->node_id));
 350         }
 351 }
 352
 353 void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
 354 {
 355         if (!host->in_bus_reset)
 356                 HPSB_NOTICE("SelfID completion called outside of bus reset!");
 357
 358         host->node_id = LOCAL_BUS | phyid;
 359         host->is_root = isroot;
 360
 361         if (!check_selfids(host)) {
 362                 if (host->reset_retries++ < 20) {
 363                         /* selfid stage did not complete without error */
 364                         HPSB_NOTICE("Error in SelfID stage, resetting");
 365                         host->in_bus_reset = 0;
 366                         /* this should work from ohci1394 now... */
 367                         hpsb_reset_bus(host, LONG_RESET);
 368                         return;
 369                 } else {
 370                         HPSB_NOTICE("Stopping out-of-control reset loop");
 371                         HPSB_NOTICE("Warning - topology map and speed map will not be valid");
 372                         host->reset_retries = 0;
 373                 }
 374         } else {
 375                 host->reset_retries = 0;
 376                 build_speed_map(host, host->node_count);
 377         }
 378
 379         HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
 380                      "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
 381
 382         /* irm_id is kept up to date by check_selfids() */
 383         if (host->irm_id == host->node_id) {
 384                 host->is_irm = 1;
 385         } else {
 386                 host->is_busmgr = 0;
 387                 host->is_irm = 0;
 388         }
 389
 390         if (isroot) {
 391                 host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
 392                 host->is_cycmst = 1;
 393         }
 394         atomic_inc(&host->generation);
 395         host->in_bus_reset = 0;
 396         highlevel_host_reset(host);
 397 }
 398
 399
 400 void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
 401                       int ackcode)
 402 {
 403         unsigned long flags;
 404
 405         spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
 406
 407         packet->ack_code = ackcode;
 408
 409         if (packet->no_waiter || packet->state == hpsb_complete) {
 410                 /* if packet->no_waiter, must not have a tlabel allocated */
 411                 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 412                 hpsb_free_packet(packet);
 413                 return;
 414         }
 415
 416         atomic_dec(&packet->refcnt);    /* drop HC's reference */
 417         /* here the packet must be on the host->pending_packet_queue */
 418
 419         if (ackcode != ACK_PENDING || !packet->expect_response) {
 420                 packet->state = hpsb_complete;
 421                 __skb_unlink(packet->skb, &host->pending_packet_queue);
 422                 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 423                 queue_packet_complete(packet);
 424                 return;
 425         }
 426
 427         packet->state = hpsb_pending;
 428         packet->sendtime = jiffies;
 429
 430         spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 431
 432         mod_timer(&host->timeout, jiffies + host->timeout_interval);
 433 }
 434
 435 /**
 436  * hpsb_send_phy_config - transmit a PHY configuration packet on the bus
 437  * @host: host that PHY config packet gets sent through
 438  * @rootid: root whose force_root bit should get set (-1 = don't set force_root)
 439  * @gapcnt: gap count value to set (-1 = don't set gap count)
 440  *
 441  * This function sends a PHY config packet on the bus through the specified host.
 442  *
 443  * Return value: 0 for success or error number otherwise.
 444  */
 445 int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
 446 {
 447         struct hpsb_packet *packet;
 448         int retval = 0;
 449
 450         if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
 451            (rootid == -1 && gapcnt == -1)) {
 452                 HPSB_DEBUG("Invalid Parameter: rootid = %d   gapcnt = %d",
 453                            rootid, gapcnt);
 454                 return -EINVAL;
 455         }
 456
 457         packet = hpsb_alloc_packet(0);
 458         if (!packet)
 459                 return -ENOMEM;
 460
 461         packet->host = host;
 462         packet->header_size = 8;
 463         packet->data_size = 0;
 464         packet->expect_response = 0;
 465         packet->no_waiter = 0;
 466         packet->type = hpsb_raw;
 467         packet->header[0] = 0;
 468         if (rootid != -1)
 469                 packet->header[0] |= rootid << 24 | 1 << 23;
 470         if (gapcnt != -1)
 471                 packet->header[0] |= gapcnt << 16 | 1 << 22;
 472
 473         packet->header[1] = ~packet->header[0];
 474
 475         packet->generation = get_hpsb_generation(host);
 476
 477         retval = hpsb_send_packet_and_wait(packet);
 478         hpsb_free_packet(packet);
 479
 480         return retval;
 481 }
 482
 483 /**
 484  * hpsb_send_packet - transmit a packet on the bus
 485  * @packet: packet to send
 486  *
 487  * The packet is sent through the host specified in the packet->host field.
 488  * Before sending, the packet's transmit speed is automatically determined
 489  * using the local speed map when it is an async, non-broadcast packet.
 490  *
 491  * Possibilities for failure are that host is either not initialized, in bus
 492  * reset, the packet's generation number doesn't match the current generation
 493  * number or the host reports a transmit error.
 494  *
 495  * Return value: 0 on success, negative errno on failure.
 496  */
 497 int hpsb_send_packet(struct hpsb_packet *packet)
 498 {
 499         struct hpsb_host *host = packet->host;
 500
 501         if (host->is_shutdown)
 502                 return -EINVAL;
 503         if (host->in_bus_reset ||
 504             (packet->generation != get_hpsb_generation(host)))
 505                 return -EAGAIN;
 506
 507         packet->state = hpsb_queued;
 508
 509         /* This just seems silly to me */
 510         WARN_ON(packet->no_waiter && packet->expect_response);
 511
 512         if (!packet->no_waiter || packet->expect_response) {
 513                 atomic_inc(&packet->refcnt);
 514                 skb_queue_tail(&host->pending_packet_queue, packet->skb);
 515         }
 516
 517         if (packet->node_id == host->node_id) {
 518                 /* it is a local request, so handle it locally */
 519
 520                 quadlet_t *data;
 521                 size_t size = packet->data_size + packet->header_size;
 522
 523                 data = kmalloc(size, GFP_ATOMIC);
 524                 if (!data) {
 525                         HPSB_ERR("unable to allocate memory for concatenating header and data");
 526                         return -ENOMEM;
 527                 }
 528
 529                 memcpy(data, packet->header, packet->header_size);
 530
 531                 if (packet->data_size)
 532                         memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size);
 533
 534                 dump_packet("send packet local:", packet->header,
 535                             packet->header_size);
 536
 537                 hpsb_packet_sent(host, packet, packet->expect_response ? ACK_PENDING : ACK_COMPLETE);
 538                 hpsb_packet_received(host, data, size, 0);
 539
 540                 kfree(data);
 541
 542                 return 0;
 543         }
 544
 545         if (packet->type == hpsb_async && packet->node_id != ALL_NODES) {
 546                 packet->speed_code =
 547                         host->speed_map[NODEID_TO_NODE(host->node_id) * 64
 548                                        + NODEID_TO_NODE(packet->node_id)];
 549         }
 550
 551 #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
 552         switch (packet->speed_code) {
 553         case 2:
 554                 dump_packet("send packet 400:", packet->header,
 555                             packet->header_size);
 556                 break;
 557         case 1:
 558                 dump_packet("send packet 200:", packet->header,
 559                             packet->header_size);
 560                 break;
 561         default:
 562                 dump_packet("send packet 100:", packet->header,
 563                             packet->header_size);
 564         }
 565 #endif
 566
 567         return host->driver->transmit_packet(host, packet);
 568 }
 569
 570 /* We could just use complete() directly as the packet complete
 571  * callback, but this is more typesafe, in the sense that we get a
 572  * compiler error if the prototype for complete() changes. */
 573
 574 static void complete_packet(void *data)
 575 {
 576         complete((struct completion *) data);
 577 }
 578
 579 int hpsb_send_packet_and_wait(struct hpsb_packet *packet)
 580 {
 581         struct completion done;
 582         int retval;
 583
 584         init_completion(&done);
 585         hpsb_set_packet_complete_task(packet, complete_packet, &done);
 586         retval = hpsb_send_packet(packet);
 587         if (retval == 0)
 588                 wait_for_completion(&done);
 589
 590         return retval;
 591 }
 592
 593 static void send_packet_nocare(struct hpsb_packet *packet)
 594 {
 595         if (hpsb_send_packet(packet) < 0) {
 596                 hpsb_free_packet(packet);
 597         }
 598 }
 599
 600
 601 static void handle_packet_response(struct hpsb_host *host, int tcode,
 602                                    quadlet_t *data, size_t size)
 603 {
 604         struct hpsb_packet *packet = NULL;
 605         struct sk_buff *skb;
 606         int tcode_match = 0;
 607         int tlabel;
 608         unsigned long flags;
 609
 610         tlabel = (data[0] >> 10) & 0x3f;
 611
 612         spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
 613
 614         skb_queue_walk(&host->pending_packet_queue, skb) {
 615                 packet = (struct hpsb_packet *)skb->data;
 616                 if ((packet->tlabel == tlabel)
 617                     && (packet->node_id == (data[1] >> 16))){
 618                         break;
 619                 }
 620
 621                 packet = NULL;
 622         }
 623
 624         if (packet == NULL) {
 625                 HPSB_DEBUG("unsolicited response packet received - no tlabel match");
 626                 dump_packet("contents:", data, 16);
 627                 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 628                 return;
 629         }
 630
 631         switch (packet->tcode) {
 632         case TCODE_WRITEQ:
 633         case TCODE_WRITEB:
 634                 if (tcode != TCODE_WRITE_RESPONSE)
 635                         break;
 636                 tcode_match = 1;
 637                 memcpy(packet->header, data, 12);
 638                 break;
 639         case TCODE_READQ:
 640                 if (tcode != TCODE_READQ_RESPONSE)
 641                         break;
 642                 tcode_match = 1;
 643                 memcpy(packet->header, data, 16);
 644                 break;
 645         case TCODE_READB:
 646                 if (tcode != TCODE_READB_RESPONSE)
 647                         break;
 648                 tcode_match = 1;
 649                 BUG_ON(packet->skb->len - sizeof(*packet) < size - 16);
 650                 memcpy(packet->header, data, 16);
 651                 memcpy(packet->data, data + 4, size - 16);
 652                 break;
 653         case TCODE_LOCK_REQUEST:
 654                 if (tcode != TCODE_LOCK_RESPONSE)
 655                         break;
 656                 tcode_match = 1;
 657                 size = min((size - 16), (size_t)8);
 658                 BUG_ON(packet->skb->len - sizeof(*packet) < size);
 659                 memcpy(packet->header, data, 16);
 660                 memcpy(packet->data, data + 4, size);
 661                 break;
 662         }
 663
 664         if (!tcode_match) {
 665                 spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 666                 HPSB_INFO("unsolicited response packet received - tcode mismatch");
 667                 dump_packet("contents:", data, 16);
 668                 return;
 669         }
 670
 671         __skb_unlink(skb, skb->list);
 672
 673         if (packet->state == hpsb_queued) {
 674                 packet->sendtime = jiffies;
 675                 packet->ack_code = ACK_PENDING;
 676         }
 677
 678         packet->state = hpsb_complete;
 679         spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 680
 681         queue_packet_complete(packet);
 682 }
 683
 684
 685 static struct hpsb_packet *create_reply_packet(struct hpsb_host *host,
 686                                                quadlet_t *data, size_t dsize)
 687 {
 688         struct hpsb_packet *p;
 689
 690         p = hpsb_alloc_packet(dsize);
 691         if (unlikely(p == NULL)) {
 692                 /* FIXME - send data_error response */
 693                 return NULL;
 694         }
 695
 696         p->type = hpsb_async;
 697         p->state = hpsb_unused;
 698         p->host = host;
 699         p->node_id = data[1] >> 16;
 700         p->tlabel = (data[0] >> 10) & 0x3f;
 701         p->no_waiter = 1;
 702
 703         p->generation = get_hpsb_generation(host);
 704
 705         if (dsize % 4)
 706                 p->data[dsize / 4] = 0;
 707
 708         return p;
 709 }
 710
 711 #define PREP_ASYNC_HEAD_RCODE(tc) \
 712         packet->tcode = tc; \
 713         packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
 714                 | (1 << 8) | (tc << 4); \
 715         packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \
 716         packet->header[2] = 0
 717
 718 static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode,
 719                               quadlet_t data)
 720 {
 721         PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE);
 722         packet->header[3] = data;
 723         packet->header_size = 16;
 724         packet->data_size = 0;
 725 }
 726
 727 static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode,
 728                                int length)
 729 {
 730         if (rcode != RCODE_COMPLETE)
 731                 length = 0;
 732
 733         PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE);
 734         packet->header[3] = length << 16;
 735         packet->header_size = 16;
 736         packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
 737 }
 738
 739 static void fill_async_write_resp(struct hpsb_packet *packet, int rcode)
 740 {
 741         PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE);
 742         packet->header[2] = 0;
 743         packet->header_size = 12;
 744         packet->data_size = 0;
 745 }
 746
 747 static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode,
 748                           int length)
 749 {
 750         if (rcode != RCODE_COMPLETE)
 751                 length = 0;
 752
 753         PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE);
 754         packet->header[3] = (length << 16) | extcode;
 755         packet->header_size = 16;
 756         packet->data_size = length;
 757 }
 758
 759 #define PREP_REPLY_PACKET(length) \
 760                 packet = create_reply_packet(host, data, length); \
 761                 if (packet == NULL) break
 762
 763 static void handle_incoming_packet(struct hpsb_host *host, int tcode,
 764                                    quadlet_t *data, size_t size, int write_acked)
 765 {
 766         struct hpsb_packet *packet;
 767         int length, rcode, extcode;
 768         quadlet_t buffer;
 769         nodeid_t source = data[1] >> 16;
 770         nodeid_t dest = data[0] >> 16;
 771         u16 flags = (u16) data[0];
 772         u64 addr;
 773
 774         /* big FIXME - no error checking is done for an out of bounds length */
 775
 776         switch (tcode) {
 777         case TCODE_WRITEQ:
 778                 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
 779                 rcode = highlevel_write(host, source, dest, data+3,
 780                                         addr, 4, flags);
 781
 782                 if (!write_acked
 783                     && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
 784                     && (rcode >= 0)) {
 785                         /* not a broadcast write, reply */
 786                         PREP_REPLY_PACKET(0);
 787                         fill_async_write_resp(packet, rcode);
 788                         send_packet_nocare(packet);
 789                 }
 790                 break;
 791
 792         case TCODE_WRITEB:
 793                 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
 794                 rcode = highlevel_write(host, source, dest, data+4,
 795                                         addr, data[3]>>16, flags);
 796
 797                 if (!write_acked
 798                     && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK)
 799                     && (rcode >= 0)) {
 800                         /* not a broadcast write, reply */
 801                         PREP_REPLY_PACKET(0);
 802                         fill_async_write_resp(packet, rcode);
 803                         send_packet_nocare(packet);
 804                 }
 805                 break;
 806
 807         case TCODE_READQ:
 808                 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
 809                 rcode = highlevel_read(host, source, &buffer, addr, 4, flags);
 810
 811                 if (rcode >= 0) {
 812                         PREP_REPLY_PACKET(0);
 813                         fill_async_readquad_resp(packet, rcode, buffer);
 814                         send_packet_nocare(packet);
 815                 }
 816                 break;
 817
 818         case TCODE_READB:
 819                 length = data[3] >> 16;
 820                 PREP_REPLY_PACKET(length);
 821
 822                 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
 823                 rcode = highlevel_read(host, source, packet->data, addr,
 824                                        length, flags);
 825
 826                 if (rcode >= 0) {
 827                         fill_async_readblock_resp(packet, rcode, length);
 828                         send_packet_nocare(packet);
 829                 } else {
 830                         hpsb_free_packet(packet);
 831                 }
 832                 break;
 833
 834         case TCODE_LOCK_REQUEST:
 835                 length = data[3] >> 16;
 836                 extcode = data[3] & 0xffff;
 837                 addr = (((u64)(data[1] & 0xffff)) << 32) | data[2];
 838
 839                 PREP_REPLY_PACKET(8);
 840
 841                 if ((extcode == 0) || (extcode >= 7)) {
 842                         /* let switch default handle error */
 843                         length = 0;
 844                 }
 845
 846                 switch (length) {
 847                 case 4:
 848                         rcode = highlevel_lock(host, source, packet->data, addr,
 849                                                data[4], 0, extcode,flags);
 850                         fill_async_lock_resp(packet, rcode, extcode, 4);
 851                         break;
 852                 case 8:
 853                         if ((extcode != EXTCODE_FETCH_ADD)
 854                             && (extcode != EXTCODE_LITTLE_ADD)) {
 855                                 rcode = highlevel_lock(host, source,
 856                                                        packet->data, addr,
 857                                                        data[5], data[4],
 858                                                        extcode, flags);
 859                                 fill_async_lock_resp(packet, rcode, extcode, 4);
 860                         } else {
 861                                 rcode = highlevel_lock64(host, source,
 862                                              (octlet_t *)packet->data, addr,
 863                                              *(octlet_t *)(data + 4), 0ULL,
 864                                              extcode, flags);
 865                                 fill_async_lock_resp(packet, rcode, extcode, 8);
 866                         }
 867                         break;
 868                 case 16:
 869                         rcode = highlevel_lock64(host, source,
 870                                                  (octlet_t *)packet->data, addr,
 871                                                  *(octlet_t *)(data + 6),
 872                                                  *(octlet_t *)(data + 4),
 873                                                  extcode, flags);
 874                         fill_async_lock_resp(packet, rcode, extcode, 8);
 875                         break;
 876                 default:
 877                         rcode = RCODE_TYPE_ERROR;
 878                         fill_async_lock_resp(packet, rcode,
 879                                              extcode, 0);
 880                 }
 881
 882                 if (rcode >= 0) {
 883                         send_packet_nocare(packet);
 884                 } else {
 885                         hpsb_free_packet(packet);
 886                 }
 887                 break;
 888         }
 889
 890 }
 891 #undef PREP_REPLY_PACKET
 892
 893
 894 void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size,
 895                           int write_acked)
 896 {
 897         int tcode;
 898
 899         if (host->in_bus_reset) {
 900                 HPSB_INFO("received packet during reset; ignoring");
 901                 return;
 902         }
 903
 904         dump_packet("received packet:", data, size);
 905
 906         tcode = (data[0] >> 4) & 0xf;
 907
 908         switch (tcode) {
 909         case TCODE_WRITE_RESPONSE:
 910         case TCODE_READQ_RESPONSE:
 911         case TCODE_READB_RESPONSE:
 912         case TCODE_LOCK_RESPONSE:
 913                 handle_packet_response(host, tcode, data, size);
 914                 break;
 915
 916         case TCODE_WRITEQ:
 917         case TCODE_WRITEB:
 918         case TCODE_READQ:
 919         case TCODE_READB:
 920         case TCODE_LOCK_REQUEST:
 921                 handle_incoming_packet(host, tcode, data, size, write_acked);
 922                 break;
 923
 924
 925         case TCODE_ISO_DATA:
 926                 highlevel_iso_receive(host, data, size);
 927                 break;
 928
 929         case TCODE_CYCLE_START:
 930                 /* simply ignore this packet if it is passed on */
 931                 break;
 932
 933         default:
 934                 HPSB_NOTICE("received packet with bogus transaction code %d",
 935                             tcode);
 936                 break;
 937         }
 938 }
 939
 940
 941 void abort_requests(struct hpsb_host *host)
 942 {
 943         struct hpsb_packet *packet;
 944         struct sk_buff *skb;
 945
 946         host->driver->devctl(host, CANCEL_REQUESTS, 0);
 947
 948         while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) {
 949                 packet = (struct hpsb_packet *)skb->data;
 950
 951                 packet->state = hpsb_complete;
 952                 packet->ack_code = ACKX_ABORTED;
 953                 queue_packet_complete(packet);
 954         }
 955 }
 956
 957 void abort_timedouts(unsigned long __opaque)
 958 {
 959         struct hpsb_host *host = (struct hpsb_host *)__opaque;
 960         unsigned long flags;
 961         struct hpsb_packet *packet;
 962         struct sk_buff *skb;
 963         unsigned long expire;
 964
 965         spin_lock_irqsave(&host->csr.lock, flags);
 966         expire = host->csr.expire;
 967         spin_unlock_irqrestore(&host->csr.lock, flags);
 968
 969         /* Hold the lock around this, since we aren't dequeuing all
 970          * packets, just ones we need. */
 971         spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
 972
 973         while (!skb_queue_empty(&host->pending_packet_queue)) {
 974                 skb = skb_peek(&host->pending_packet_queue);
 975
 976                 packet = (struct hpsb_packet *)skb->data;
 977
 978                 if (time_before(packet->sendtime + expire, jiffies)) {
 979                         __skb_unlink(skb, skb->list);
 980                         packet->state = hpsb_complete;
 981                         packet->ack_code = ACKX_TIMEOUT;
 982                         queue_packet_complete(packet);
 983                 } else {
 984                         /* Since packets are added to the tail, the oldest
 985                          * ones are first, always. When we get to one that
 986                          * isn't timed out, the rest aren't either. */
 987                         break;
 988                 }
 989         }
 990
 991         if (!skb_queue_empty(&host->pending_packet_queue))
 992                 mod_timer(&host->timeout, jiffies + host->timeout_interval);
 993
 994         spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
 995 }
 996
 997
 998 /* Kernel thread and vars, which handles packets that are completed. Only
 999  * packets that have a "complete" function are sent here. This way, the
1000  * completion is run out of kernel context, and doesn't block the rest of
1001  * the stack. */
1002 static int khpsbpkt_pid = -1, khpsbpkt_kill;
1003 static DECLARE_COMPLETION(khpsbpkt_complete);
1004 struct sk_buff_head hpsbpkt_queue;
1005 static DECLARE_MUTEX_LOCKED(khpsbpkt_sig);
1006
1007
1008 static void queue_packet_complete(struct hpsb_packet *packet)
1009 {
1010         if (packet->no_waiter) {
1011                 hpsb_free_packet(packet);
1012                 return;
1013         }
1014         if (packet->complete_routine != NULL) {
1015                 skb_queue_tail(&hpsbpkt_queue, packet->skb);
1016
1017                 /* Signal the kernel thread to handle this */
1018                 up(&khpsbpkt_sig);
1019         }
1020         return;
1021 }
1022
1023 static int hpsbpkt_thread(void *__hi)
1024 {
1025         struct sk_buff *skb;
1026         struct hpsb_packet *packet;
1027         void (*complete_routine)(void*);
1028         void *complete_data;
1029
1030         daemonize("khpsbpkt");
1031
1032         while (!down_interruptible(&khpsbpkt_sig)) {
1033                 if (khpsbpkt_kill)
1034                         break;
1035
1036                 while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) {
1037                         packet = (struct hpsb_packet *)skb->data;
1038
1039                         complete_routine = packet->complete_routine;
1040                         complete_data = packet->complete_data;
1041
1042                         packet->complete_routine = packet->complete_data = NULL;
1043
1044                         complete_routine(complete_data);
1045                 }
1046         }
1047
1048         complete_and_exit(&khpsbpkt_complete, 0);
1049 }
1050
1051
1052 static int __init ieee1394_init(void)
1053 {
1054         int i, ret;
1055
1056         skb_queue_head_init(&hpsbpkt_queue);
1057
1058         /* non-fatal error */
1059         if (hpsb_init_config_roms()) {
1060                 HPSB_ERR("Failed to initialize some config rom entries.\n");
1061                 HPSB_ERR("Some features may not be available\n");
1062         }
1063
1064         khpsbpkt_pid = kernel_thread(hpsbpkt_thread, NULL, CLONE_KERNEL);
1065         if (khpsbpkt_pid < 0) {
1066                 HPSB_ERR("Failed to start hpsbpkt thread!\n");
1067                 ret = -ENOMEM;
1068                 goto exit_cleanup_config_roms;
1069         }
1070
1071         if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) {
1072                 HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR);
1073                 ret = -ENODEV;
1074                 goto exit_release_kernel_thread;
1075         }
1076
1077         /* actually this is a non-fatal error */
1078         ret = devfs_mk_dir("ieee1394");
1079         if (ret < 0) {
1080                 HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR);
1081                 goto release_chrdev;
1082         }
1083
1084         ret = bus_register(&ieee1394_bus_type);
1085         if (ret < 0) {
1086                 HPSB_INFO("bus register failed");
1087                 goto release_devfs;
1088         }
1089
1090         for (i = 0; fw_bus_attrs[i]; i++) {
1091                 ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1092                 if (ret < 0) {
1093                         while (i >= 0) {
1094                                 bus_remove_file(&ieee1394_bus_type,
1095                                                 fw_bus_attrs[i--]);
1096                         }
1097                         bus_unregister(&ieee1394_bus_type);
1098                         goto release_devfs;
1099                 }
1100         }
1101
1102         ret = class_register(&hpsb_host_class);
1103         if (ret < 0)
1104                 goto release_all_bus;
1105
1106         ret = init_csr();
1107         if (ret) {
1108                 HPSB_INFO("init csr failed");
1109                 ret = -ENOMEM;
1110                 goto release_class;
1111         }
1112
1113         if (disable_nodemgr) {
1114                 HPSB_INFO("nodemgr functionality disabled");
1115                 return 0;
1116         }
1117
1118         ret = init_ieee1394_nodemgr();
1119         if (ret < 0) {
1120                 HPSB_INFO("init nodemgr failed");
1121                 goto cleanup_csr;
1122         }
1123
1124         return 0;
1125
1126 cleanup_csr:
1127         cleanup_csr();
1128 release_class:
1129         class_unregister(&hpsb_host_class);
1130 release_all_bus:
1131         for (i = 0; fw_bus_attrs[i]; i++)
1132                 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1133         bus_unregister(&ieee1394_bus_type);
1134 release_devfs:
1135         devfs_remove("ieee1394");
1136 release_chrdev:
1137         unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1138 exit_release_kernel_thread:
1139         if (khpsbpkt_pid >= 0) {
1140                 kill_proc(khpsbpkt_pid, SIGTERM, 1);
1141                 wait_for_completion(&khpsbpkt_complete);
1142         }
1143 exit_cleanup_config_roms:
1144         hpsb_cleanup_config_roms();
1145         return ret;
1146 }
1147
1148 static void __exit ieee1394_cleanup(void)
1149 {
1150         int i;
1151
1152         if (!disable_nodemgr)
1153                 cleanup_ieee1394_nodemgr();
1154
1155         cleanup_csr();
1156
1157         class_unregister(&hpsb_host_class);
1158         for (i = 0; fw_bus_attrs[i]; i++)
1159                 bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
1160         bus_unregister(&ieee1394_bus_type);
1161
1162         if (khpsbpkt_pid >= 0) {
1163                 khpsbpkt_kill = 1;
1164                 mb();
1165                 up(&khpsbpkt_sig);
1166                 wait_for_completion(&khpsbpkt_complete);
1167         }
1168
1169         hpsb_cleanup_config_roms();
1170
1171         unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
1172         devfs_remove("ieee1394");
1173 }
1174
1175 module_init(ieee1394_init);
1176 module_exit(ieee1394_cleanup);
1177
1178 /* Exported symbols */
1179
1180 /** hosts.c **/
1181 EXPORT_SYMBOL(hpsb_alloc_host);
1182 EXPORT_SYMBOL(hpsb_add_host);
1183 EXPORT_SYMBOL(hpsb_remove_host);
1184 EXPORT_SYMBOL(hpsb_update_config_rom_image);
1185
1186 /** ieee1394_core.c **/
1187 EXPORT_SYMBOL(hpsb_speedto_str);
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_phy_config);
1192 EXPORT_SYMBOL(hpsb_send_packet);
1193 EXPORT_SYMBOL(hpsb_send_packet_and_wait);
1194 EXPORT_SYMBOL(hpsb_reset_bus);
1195 EXPORT_SYMBOL(hpsb_bus_reset);
1196 EXPORT_SYMBOL(hpsb_selfid_received);
1197 EXPORT_SYMBOL(hpsb_selfid_complete);
1198 EXPORT_SYMBOL(hpsb_packet_sent);
1199 EXPORT_SYMBOL(hpsb_packet_received);
1200
1201 /** ieee1394_transactions.c **/
1202 EXPORT_SYMBOL(hpsb_get_tlabel);
1203 EXPORT_SYMBOL(hpsb_free_tlabel);
1204 EXPORT_SYMBOL(hpsb_make_readpacket);
1205 EXPORT_SYMBOL(hpsb_make_writepacket);
1206 EXPORT_SYMBOL(hpsb_make_streampacket);
1207 EXPORT_SYMBOL(hpsb_make_lockpacket);
1208 EXPORT_SYMBOL(hpsb_make_lock64packet);
1209 EXPORT_SYMBOL(hpsb_make_phypacket);
1210 EXPORT_SYMBOL(hpsb_make_isopacket);
1211 EXPORT_SYMBOL(hpsb_read);
1212 EXPORT_SYMBOL(hpsb_write);
1213 EXPORT_SYMBOL(hpsb_lock);
1214 EXPORT_SYMBOL(hpsb_lock64);
1215 EXPORT_SYMBOL(hpsb_send_gasp);
1216 EXPORT_SYMBOL(hpsb_packet_success);
1217
1218 /** highlevel.c **/
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_get_host_bykey);
1228 EXPORT_SYMBOL(hpsb_create_hostinfo);
1229 EXPORT_SYMBOL(hpsb_destroy_hostinfo);
1230 EXPORT_SYMBOL(hpsb_set_hostinfo_key);
1231 EXPORT_SYMBOL(hpsb_get_hostinfo_key);
1232 EXPORT_SYMBOL(hpsb_get_hostinfo_bykey);
1233 EXPORT_SYMBOL(hpsb_set_hostinfo);
1234 EXPORT_SYMBOL(highlevel_read);
1235 EXPORT_SYMBOL(highlevel_write);
1236 EXPORT_SYMBOL(highlevel_lock);
1237 EXPORT_SYMBOL(highlevel_lock64);
1238 EXPORT_SYMBOL(highlevel_add_host);
1239 EXPORT_SYMBOL(highlevel_remove_host);
1240 EXPORT_SYMBOL(highlevel_host_reset);
1241
1242 /** nodemgr.c **/
1243 EXPORT_SYMBOL(hpsb_guid_get_entry);
1244 EXPORT_SYMBOL(hpsb_nodeid_get_entry);
1245 EXPORT_SYMBOL(hpsb_node_fill_packet);
1246 EXPORT_SYMBOL(hpsb_node_read);
1247 EXPORT_SYMBOL(hpsb_node_write);
1248 EXPORT_SYMBOL(hpsb_node_lock);
1249 EXPORT_SYMBOL(hpsb_register_protocol);
1250 EXPORT_SYMBOL(hpsb_unregister_protocol);
1251 EXPORT_SYMBOL(ieee1394_bus_type);
1252 EXPORT_SYMBOL(nodemgr_for_each_host);
1253
1254 /** csr.c **/
1255 EXPORT_SYMBOL(hpsb_update_config_rom);
1256
1257 /** dma.c **/
1258 EXPORT_SYMBOL(dma_prog_region_init);
1259 EXPORT_SYMBOL(dma_prog_region_alloc);
1260 EXPORT_SYMBOL(dma_prog_region_free);
1261 EXPORT_SYMBOL(dma_region_init);
1262 EXPORT_SYMBOL(dma_region_alloc);
1263 EXPORT_SYMBOL(dma_region_free);
1264 EXPORT_SYMBOL(dma_region_sync_for_cpu);
1265 EXPORT_SYMBOL(dma_region_sync_for_device);
1266 EXPORT_SYMBOL(dma_region_mmap);
1267 EXPORT_SYMBOL(dma_region_offset_to_bus);
1268
1269 /** iso.c **/
1270 EXPORT_SYMBOL(hpsb_iso_xmit_init);
1271 EXPORT_SYMBOL(hpsb_iso_recv_init);
1272 EXPORT_SYMBOL(hpsb_iso_xmit_start);
1273 EXPORT_SYMBOL(hpsb_iso_recv_start);
1274 EXPORT_SYMBOL(hpsb_iso_recv_listen_channel);
1275 EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel);
1276 EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask);
1277 EXPORT_SYMBOL(hpsb_iso_stop);
1278 EXPORT_SYMBOL(hpsb_iso_shutdown);
1279 EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet);
1280 EXPORT_SYMBOL(hpsb_iso_xmit_sync);
1281 EXPORT_SYMBOL(hpsb_iso_recv_release_packets);
1282 EXPORT_SYMBOL(hpsb_iso_n_ready);
1283 EXPORT_SYMBOL(hpsb_iso_packet_sent);
1284 EXPORT_SYMBOL(hpsb_iso_packet_received);
1285 EXPORT_SYMBOL(hpsb_iso_wake);
1286 EXPORT_SYMBOL(hpsb_iso_recv_flush);
1287
1288 /** csr1212.c **/
1289 EXPORT_SYMBOL(csr1212_create_csr);
1290 EXPORT_SYMBOL(csr1212_init_local_csr);
1291 EXPORT_SYMBOL(csr1212_new_immediate);
1292 EXPORT_SYMBOL(csr1212_new_leaf);
1293 EXPORT_SYMBOL(csr1212_new_csr_offset);
1294 EXPORT_SYMBOL(csr1212_new_directory);
1295 EXPORT_SYMBOL(csr1212_associate_keyval);
1296 EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
1297 EXPORT_SYMBOL(csr1212_new_extended_immediate);
1298 EXPORT_SYMBOL(csr1212_new_extended_leaf);
1299 EXPORT_SYMBOL(csr1212_new_descriptor_leaf);
1300 EXPORT_SYMBOL(csr1212_new_textual_descriptor_leaf);
1301 EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
1302 EXPORT_SYMBOL(csr1212_new_icon_descriptor_leaf);
1303 EXPORT_SYMBOL(csr1212_new_modifiable_descriptor_leaf);
1304 EXPORT_SYMBOL(csr1212_new_keyword_leaf);
1305 EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
1306 EXPORT_SYMBOL(csr1212_disassociate_keyval);
1307 EXPORT_SYMBOL(csr1212_release_keyval);
1308 EXPORT_SYMBOL(csr1212_destroy_csr);
1309 EXPORT_SYMBOL(csr1212_read);
1310 EXPORT_SYMBOL(csr1212_generate_positions);
1311 EXPORT_SYMBOL(csr1212_generate_layout_order);
1312 EXPORT_SYMBOL(csr1212_fill_cache);
1313 EXPORT_SYMBOL(csr1212_generate_csr_image);
1314 EXPORT_SYMBOL(csr1212_parse_keyval);
1315 EXPORT_SYMBOL(csr1212_parse_csr);
1316 EXPORT_SYMBOL(_csr1212_read_keyval);
1317 EXPORT_SYMBOL(_csr1212_destroy_keyval);