git://git.whamcloud.com - fs/lustre-release.git/blob

   1 /*
   2  * Copyright (C) 2002 Cluster File Systems, Inc.
   3  *   Author: Eric Barton <eric@bartonsoftware.com>
   4  *
   5  * Copyright (C) 2002, Lawrence Livermore National Labs (LLNL)
   6  * W. Marcus Miller - Based on ksocknal
   7  *
   8  * This file is part of Portals, http://www.sf.net/projects/lustre/
   9  *
  10  * Portals is free software; you can redistribute it and/or
  11  * modify it under the terms of version 2 of the GNU General Public
  12  * License as published by the Free Software Foundation.
  13  *
  14  * Portals is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with Portals; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  */
  24
  25 #include "qswnal.h"
  26
  27 ptl_handle_ni_t         kqswnal_ni;
  28 nal_t                   kqswnal_api;
  29 kqswnal_data_t          kqswnal_data;
  30
  31 kpr_nal_interface_t kqswnal_router_interface = {
  32         kprni_nalid:    QSWNAL,
  33         kprni_arg:      NULL,
  34         kprni_fwd:      kqswnal_fwd_packet,
  35         kprni_notify:   NULL,                   /* we're connectionless */
  36 };
  37
  38 #if CONFIG_SYSCTL
  39 #define QSWNAL_SYSCTL  201
  40
  41 #define QSWNAL_SYSCTL_OPTIMIZED_GETS     1
  42 #define QSWNAL_SYSCTL_COPY_SMALL_FWD     2
  43
  44 static ctl_table kqswnal_ctl_table[] = {
  45         {QSWNAL_SYSCTL_OPTIMIZED_GETS, "optimized_gets",
  46          &kqswnal_data.kqn_optimized_gets, sizeof (int),
  47          0644, NULL, &proc_dointvec},
  48         {QSWNAL_SYSCTL_COPY_SMALL_FWD, "copy_small_fwd",
  49          &kqswnal_data.kqn_copy_small_fwd, sizeof (int),
  50          0644, NULL, &proc_dointvec},
  51         {0}
  52 };
  53
  54 static ctl_table kqswnal_top_ctl_table[] = {
  55         {QSWNAL_SYSCTL, "qswnal", NULL, 0, 0555, kqswnal_ctl_table},
  56         {0}
  57 };
  58 #endif
  59
  60 static int
  61 kqswnal_forward(nal_t   *nal,
  62                 int     id,
  63                 void    *args,  size_t args_len,
  64                 void    *ret,   size_t ret_len)
  65 {
  66         kqswnal_data_t *k = nal->nal_data;
  67         nal_cb_t       *nal_cb = k->kqn_cb;
  68
  69         LASSERT (nal == &kqswnal_api);
  70         LASSERT (k == &kqswnal_data);
  71         LASSERT (nal_cb == &kqswnal_lib);
  72
  73         lib_dispatch(nal_cb, k, id, args, ret); /* nal needs k */
  74         return (PTL_OK);
  75 }
  76
  77 static void
  78 kqswnal_lock (nal_t *nal, unsigned long *flags)
  79 {
  80         kqswnal_data_t *k = nal->nal_data;
  81         nal_cb_t       *nal_cb = k->kqn_cb;
  82
  83         LASSERT (nal == &kqswnal_api);
  84         LASSERT (k == &kqswnal_data);
  85         LASSERT (nal_cb == &kqswnal_lib);
  86
  87         nal_cb->cb_cli(nal_cb,flags);
  88 }
  89
  90 static void
  91 kqswnal_unlock(nal_t *nal, unsigned long *flags)
  92 {
  93         kqswnal_data_t *k = nal->nal_data;
  94         nal_cb_t       *nal_cb = k->kqn_cb;
  95
  96         LASSERT (nal == &kqswnal_api);
  97         LASSERT (k == &kqswnal_data);
  98         LASSERT (nal_cb == &kqswnal_lib);
  99
 100         nal_cb->cb_sti(nal_cb,flags);
 101 }
 102
 103 static int
 104 kqswnal_shutdown(nal_t *nal, int ni)
 105 {
 106         CDEBUG (D_NET, "shutdown\n");
 107
 108         LASSERT (nal == &kqswnal_api);
 109         return (0);
 110 }
 111
 112 static void
 113 kqswnal_yield( nal_t *nal )
 114 {
 115         CDEBUG (D_NET, "yield\n");
 116
 117         if (need_resched())
 118                 schedule();
 119         return;
 120 }
 121
 122 static nal_t *
 123 kqswnal_init(int interface, ptl_pt_index_t ptl_size, ptl_ac_index_t ac_size,
 124              ptl_pid_t requested_pid)
 125 {
 126         ptl_nid_t mynid = kqswnal_elanid2nid (kqswnal_data.kqn_elanid);
 127         int       nnids = kqswnal_data.kqn_nnodes;
 128
 129         CDEBUG(D_NET, "calling lib_init with nid "LPX64" of %d\n", mynid, nnids);
 130
 131         lib_init(&kqswnal_lib, mynid, 0, nnids, ptl_size, ac_size);
 132
 133         return (&kqswnal_api);
 134 }
 135
 136 int
 137 kqswnal_get_tx_desc (struct portals_cfg *pcfg)
 138 {
 139         unsigned long      flags;
 140         struct list_head  *tmp;
 141         kqswnal_tx_t      *ktx;
 142         int                index = pcfg->pcfg_count;
 143         int                rc = -ENOENT;
 144
 145         spin_lock_irqsave (&kqswnal_data.kqn_idletxd_lock, flags);
 146
 147         list_for_each (tmp, &kqswnal_data.kqn_activetxds) {
 148                 if (index-- != 0)
 149                         continue;
 150
 151                 ktx = list_entry (tmp, kqswnal_tx_t, ktx_list);
 152
 153                 pcfg->pcfg_pbuf1 = (char *)ktx;
 154                 pcfg->pcfg_count = NTOH__u32(ktx->ktx_wire_hdr->type);
 155                 pcfg->pcfg_size  = NTOH__u32(ktx->ktx_wire_hdr->payload_length);
 156                 pcfg->pcfg_nid   = NTOH__u64(ktx->ktx_wire_hdr->dest_nid);
 157                 pcfg->pcfg_nid2  = ktx->ktx_nid;
 158                 pcfg->pcfg_misc  = ktx->ktx_launcher;
 159                 pcfg->pcfg_flags = (list_empty (&ktx->ktx_delayed_list) ? 0 : 1) |
 160                                   (!ktx->ktx_isnblk                    ? 0 : 2) |
 161                                   (ktx->ktx_state << 2);
 162                 rc = 0;
 163                 break;
 164         }
 165
 166         spin_unlock_irqrestore (&kqswnal_data.kqn_idletxd_lock, flags);
 167         return (rc);
 168 }
 169
 170 int
 171 kqswnal_cmd (struct portals_cfg *pcfg, void *private)
 172 {
 173         LASSERT (pcfg != NULL);
 174
 175         switch (pcfg->pcfg_command) {
 176         case NAL_CMD_GET_TXDESC:
 177                 return (kqswnal_get_tx_desc (pcfg));
 178
 179         case NAL_CMD_REGISTER_MYNID:
 180                 CDEBUG (D_IOCTL, "setting NID offset to "LPX64" (was "LPX64")\n",
 181                         pcfg->pcfg_nid - kqswnal_data.kqn_elanid,
 182                         kqswnal_data.kqn_nid_offset);
 183                 kqswnal_data.kqn_nid_offset =
 184                         pcfg->pcfg_nid - kqswnal_data.kqn_elanid;
 185                 kqswnal_lib.ni.nid = pcfg->pcfg_nid;
 186                 return (0);
 187
 188         default:
 189                 return (-EINVAL);
 190         }
 191 }
 192
 193 void __exit
 194 kqswnal_finalise (void)
 195 {
 196         kqswnal_tx_t *ktx;
 197         kqswnal_rx_t *krx;
 198
 199         switch (kqswnal_data.kqn_init)
 200         {
 201         default:
 202                 LASSERT (0);
 203
 204         case KQN_INIT_ALL:
 205 #if CONFIG_SYSCTL
 206                 if (kqswnal_data.kqn_sysctl != NULL)
 207                         unregister_sysctl_table (kqswnal_data.kqn_sysctl);
 208 #endif
 209                 PORTAL_SYMBOL_UNREGISTER (kqswnal_ni);
 210                 kportal_nal_unregister(QSWNAL);
 211                 /* fall through */
 212
 213         case KQN_INIT_PTL:
 214                 PtlNIFini (kqswnal_ni);
 215                 lib_fini (&kqswnal_lib);
 216                 /* fall through */
 217
 218         case KQN_INIT_DATA:
 219                 break;
 220
 221         case KQN_INIT_NOTHING:
 222                 return;
 223         }
 224
 225         /**********************************************************************/
 226         /* Make router stop her calling me and fail any more call-ins */
 227         kpr_shutdown (&kqswnal_data.kqn_router);
 228
 229         /**********************************************************************/
 230         /* flag threads we've started to terminate and wait for all to ack */
 231
 232         kqswnal_data.kqn_shuttingdown = 1;
 233         wake_up_all (&kqswnal_data.kqn_sched_waitq);
 234
 235         while (atomic_read (&kqswnal_data.kqn_nthreads_running) != 0) {
 236                 CDEBUG(D_NET, "waiting for %d threads to start shutting down\n",
 237                        atomic_read (&kqswnal_data.kqn_nthreads_running));
 238                 set_current_state (TASK_UNINTERRUPTIBLE);
 239                 schedule_timeout (HZ);
 240         }
 241
 242         /**********************************************************************/
 243         /* close elan comms */
 244 #if MULTIRAIL_EKC
 245         if (kqswnal_data.kqn_eprx_small != NULL)
 246                 ep_free_rcvr (kqswnal_data.kqn_eprx_small);
 247
 248         if (kqswnal_data.kqn_eprx_large != NULL)
 249                 ep_free_rcvr (kqswnal_data.kqn_eprx_large);
 250
 251         if (kqswnal_data.kqn_eptx != NULL)
 252                 ep_free_xmtr (kqswnal_data.kqn_eptx);
 253
 254         /* freeing the xmtr completes all txs pdq */
 255         LASSERT(list_empty(&kqswnal_data.kqn_activetxds));
 256 #else
 257         if (kqswnal_data.kqn_eprx_small != NULL)
 258                 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_small);
 259
 260         if (kqswnal_data.kqn_eprx_large != NULL)
 261                 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_large);
 262
 263         /* wait for transmits to complete */
 264         while (!list_empty(&kqswnal_data.kqn_activetxds)) {
 265                 CWARN("waiting for active transmits to complete\n");
 266                 set_current_state(TASK_UNINTERRUPTIBLE);
 267                 schedule_timeout(HZ);
 268         }
 269
 270         if (kqswnal_data.kqn_eptx != NULL)
 271                 ep_free_large_xmtr (kqswnal_data.kqn_eptx);
 272 #endif
 273         /**********************************************************************/
 274         /* flag threads to terminate, wake them and wait for them to die */
 275
 276         kqswnal_data.kqn_shuttingdown = 2;
 277         wake_up_all (&kqswnal_data.kqn_sched_waitq);
 278
 279         while (atomic_read (&kqswnal_data.kqn_nthreads) != 0) {
 280                 CDEBUG(D_NET, "waiting for %d threads to terminate\n",
 281                        atomic_read (&kqswnal_data.kqn_nthreads));
 282                 set_current_state (TASK_UNINTERRUPTIBLE);
 283                 schedule_timeout (HZ);
 284         }
 285
 286         /**********************************************************************/
 287         /* No more threads.  No more portals, router or comms callbacks!
 288          * I control the horizontals and the verticals...
 289          */
 290
 291 #if MULTIRAIL_EKC
 292         LASSERT (list_empty (&kqswnal_data.kqn_readyrxds));
 293 #endif
 294
 295         /**********************************************************************/
 296         /* Complete any blocked forwarding packets with error
 297          */
 298
 299         while (!list_empty (&kqswnal_data.kqn_idletxd_fwdq))
 300         {
 301                 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
 302                                                   kpr_fwd_desc_t, kprfd_list);
 303                 list_del (&fwd->kprfd_list);
 304                 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
 305         }
 306
 307         while (!list_empty (&kqswnal_data.kqn_delayedfwds))
 308         {
 309                 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_delayedfwds.next,
 310                                                   kpr_fwd_desc_t, kprfd_list);
 311                 list_del (&fwd->kprfd_list);
 312                 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
 313         }
 314
 315         /**********************************************************************/
 316         /* Wait for router to complete any packets I sent her
 317          */
 318
 319         kpr_deregister (&kqswnal_data.kqn_router);
 320
 321
 322         /**********************************************************************/
 323         /* Unmap message buffers and free all descriptors and buffers
 324          */
 325
 326 #if MULTIRAIL_EKC
 327         /* FTTB, we need to unmap any remaining mapped memory.  When
 328          * ep_dvma_release() get fixed (and releases any mappings in the
 329          * region), we can delete all the code from here -------->  */
 330
 331         for (ktx = kqswnal_data.kqn_txds; ktx != NULL; ktx =ktx->ktx_alloclist){
 332                 /* If ktx has a buffer, it got mapped; unmap now.  NB only
 333                  * the pre-mapped stuff is still mapped since all tx descs
 334                  * must be idle */
 335
 336                 if (ktx->ktx_buffer != NULL)
 337                         ep_dvma_unload(kqswnal_data.kqn_ep,
 338                                        kqswnal_data.kqn_ep_tx_nmh,
 339                                        &ktx->ktx_ebuffer);
 340         }
 341
 342         for (krx = kqswnal_data.kqn_rxds; krx != NULL; krx =krx->krx_alloclist){
 343                 /* If krx_kiov[0].kiov_page got allocated, it got mapped.
 344                  * NB subsequent pages get merged */
 345
 346                 if (krx->krx_kiov[0].kiov_page != NULL)
 347                         ep_dvma_unload(kqswnal_data.kqn_ep,
 348                                        kqswnal_data.kqn_ep_rx_nmh,
 349                                        &krx->krx_elanbuffer);
 350         }
 351         /* <----------- to here */
 352
 353         if (kqswnal_data.kqn_ep_rx_nmh != NULL)
 354                 ep_dvma_release(kqswnal_data.kqn_ep,kqswnal_data.kqn_ep_rx_nmh);
 355
 356         if (kqswnal_data.kqn_ep_tx_nmh != NULL)
 357                 ep_dvma_release(kqswnal_data.kqn_ep,kqswnal_data.kqn_ep_tx_nmh);
 358 #else
 359         if (kqswnal_data.kqn_eprxdmahandle != NULL)
 360         {
 361                 elan3_dvma_unload(kqswnal_data.kqn_ep->DmaState,
 362                                   kqswnal_data.kqn_eprxdmahandle, 0,
 363                                   KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
 364                                   KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE);
 365
 366                 elan3_dma_release(kqswnal_data.kqn_ep->DmaState,
 367                                   kqswnal_data.kqn_eprxdmahandle);
 368         }
 369
 370         if (kqswnal_data.kqn_eptxdmahandle != NULL)
 371         {
 372                 elan3_dvma_unload(kqswnal_data.kqn_ep->DmaState,
 373                                   kqswnal_data.kqn_eptxdmahandle, 0,
 374                                   KQSW_NTXMSGPAGES * (KQSW_NTXMSGS +
 375                                                       KQSW_NNBLK_TXMSGS));
 376
 377                 elan3_dma_release(kqswnal_data.kqn_ep->DmaState,
 378                                   kqswnal_data.kqn_eptxdmahandle);
 379         }
 380 #endif
 381
 382         while (kqswnal_data.kqn_txds != NULL) {
 383                 ktx = kqswnal_data.kqn_txds;
 384
 385                 if (ktx->ktx_buffer != NULL)
 386                         PORTAL_FREE(ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
 387
 388                 kqswnal_data.kqn_txds = ktx->ktx_alloclist;
 389                 PORTAL_FREE(ktx, sizeof(*ktx));
 390         }
 391
 392         while (kqswnal_data.kqn_rxds != NULL) {
 393                 int           i;
 394
 395                 krx = kqswnal_data.kqn_rxds;
 396                 for (i = 0; i < krx->krx_npages; i++)
 397                         if (krx->krx_kiov[i].kiov_page != NULL)
 398                                 __free_page (krx->krx_kiov[i].kiov_page);
 399
 400                 kqswnal_data.kqn_rxds = krx->krx_alloclist;
 401                 PORTAL_FREE(krx, sizeof (*krx));
 402         }
 403
 404         /* resets flags, pointers to NULL etc */
 405         memset(&kqswnal_data, 0, sizeof (kqswnal_data));
 406
 407         CDEBUG (D_MALLOC, "done kmem %d\n", atomic_read(&portal_kmemory));
 408
 409         printk (KERN_INFO "Lustre: Routing QSW NAL unloaded (final mem %d)\n",
 410                 atomic_read(&portal_kmemory));
 411 }
 412
 413 static int __init
 414 kqswnal_initialise (void)
 415 {
 416 #if MULTIRAIL_EKC
 417         EP_RAILMASK       all_rails = EP_RAILMASK_ALL;
 418 #else
 419         ELAN3_DMA_REQUEST dmareq;
 420 #endif
 421         int               rc;
 422         int               i;
 423         kqswnal_rx_t     *krx;
 424         kqswnal_tx_t     *ktx;
 425         int               elan_page_idx;
 426         int               pkmem = atomic_read(&portal_kmemory);
 427
 428         LASSERT (kqswnal_data.kqn_init == KQN_INIT_NOTHING);
 429
 430         CDEBUG (D_MALLOC, "start kmem %d\n", atomic_read(&portal_kmemory));
 431
 432         kqswnal_api.forward  = kqswnal_forward;
 433         kqswnal_api.shutdown = kqswnal_shutdown;
 434         kqswnal_api.yield    = kqswnal_yield;
 435         kqswnal_api.validate = NULL;            /* our api validate is a NOOP */
 436         kqswnal_api.lock     = kqswnal_lock;
 437         kqswnal_api.unlock   = kqswnal_unlock;
 438         kqswnal_api.nal_data = &kqswnal_data;
 439
 440         kqswnal_lib.nal_data = &kqswnal_data;
 441
 442         memset(&kqswnal_rpc_success, 0, sizeof(kqswnal_rpc_success));
 443         memset(&kqswnal_rpc_failed, 0, sizeof(kqswnal_rpc_failed));
 444 #if MULTIRAIL_EKC
 445         kqswnal_rpc_failed.Data[0] = -ECONNREFUSED;
 446 #else
 447         kqswnal_rpc_failed.Status = -ECONNREFUSED;
 448 #endif
 449         /* ensure all pointers NULL etc */
 450         memset (&kqswnal_data, 0, sizeof (kqswnal_data));
 451
 452         kqswnal_data.kqn_optimized_gets = KQSW_OPTIMIZED_GETS;
 453         kqswnal_data.kqn_copy_small_fwd = KQSW_COPY_SMALL_FWD;
 454
 455         kqswnal_data.kqn_cb = &kqswnal_lib;
 456
 457         INIT_LIST_HEAD (&kqswnal_data.kqn_idletxds);
 458         INIT_LIST_HEAD (&kqswnal_data.kqn_nblk_idletxds);
 459         INIT_LIST_HEAD (&kqswnal_data.kqn_activetxds);
 460         spin_lock_init (&kqswnal_data.kqn_idletxd_lock);
 461         init_waitqueue_head (&kqswnal_data.kqn_idletxd_waitq);
 462         INIT_LIST_HEAD (&kqswnal_data.kqn_idletxd_fwdq);
 463
 464         INIT_LIST_HEAD (&kqswnal_data.kqn_delayedfwds);
 465         INIT_LIST_HEAD (&kqswnal_data.kqn_delayedtxds);
 466         INIT_LIST_HEAD (&kqswnal_data.kqn_readyrxds);
 467
 468         spin_lock_init (&kqswnal_data.kqn_sched_lock);
 469         init_waitqueue_head (&kqswnal_data.kqn_sched_waitq);
 470
 471         spin_lock_init (&kqswnal_data.kqn_statelock);
 472
 473         /* pointers/lists/locks initialised */
 474         kqswnal_data.kqn_init = KQN_INIT_DATA;
 475
 476 #if MULTIRAIL_EKC
 477         kqswnal_data.kqn_ep = ep_system();
 478         if (kqswnal_data.kqn_ep == NULL) {
 479                 CERROR("Can't initialise EKC\n");
 480                 return (-ENODEV);
 481         }
 482
 483         if (ep_waitfor_nodeid(kqswnal_data.kqn_ep) == ELAN_INVALID_NODE) {
 484                 CERROR("Can't get elan ID\n");
 485                 kqswnal_finalise();
 486                 return (-ENODEV);
 487         }
 488 #else
 489         /**********************************************************************/
 490         /* Find the first Elan device */
 491
 492         kqswnal_data.kqn_ep = ep_device (0);
 493         if (kqswnal_data.kqn_ep == NULL)
 494         {
 495                 CERROR ("Can't get elan device 0\n");
 496                 return (-ENODEV);
 497         }
 498 #endif
 499
 500         kqswnal_data.kqn_nid_offset = 0;
 501         kqswnal_data.kqn_nnodes     = ep_numnodes (kqswnal_data.kqn_ep);
 502         kqswnal_data.kqn_elanid     = ep_nodeid (kqswnal_data.kqn_ep);
 503
 504         /**********************************************************************/
 505         /* Get the transmitter */
 506
 507         kqswnal_data.kqn_eptx = ep_alloc_xmtr (kqswnal_data.kqn_ep);
 508         if (kqswnal_data.kqn_eptx == NULL)
 509         {
 510                 CERROR ("Can't allocate transmitter\n");
 511                 kqswnal_finalise ();
 512                 return (-ENOMEM);
 513         }
 514
 515         /**********************************************************************/
 516         /* Get the receivers */
 517
 518         kqswnal_data.kqn_eprx_small = ep_alloc_rcvr (kqswnal_data.kqn_ep,
 519                                                      EP_MSG_SVC_PORTALS_SMALL,
 520                                                      KQSW_EP_ENVELOPES_SMALL);
 521         if (kqswnal_data.kqn_eprx_small == NULL)
 522         {
 523                 CERROR ("Can't install small msg receiver\n");
 524                 kqswnal_finalise ();
 525                 return (-ENOMEM);
 526         }
 527
 528         kqswnal_data.kqn_eprx_large = ep_alloc_rcvr (kqswnal_data.kqn_ep,
 529                                                      EP_MSG_SVC_PORTALS_LARGE,
 530                                                      KQSW_EP_ENVELOPES_LARGE);
 531         if (kqswnal_data.kqn_eprx_large == NULL)
 532         {
 533                 CERROR ("Can't install large msg receiver\n");
 534                 kqswnal_finalise ();
 535                 return (-ENOMEM);
 536         }
 537
 538         /**********************************************************************/
 539         /* Reserve Elan address space for transmit descriptors NB we may
 540          * either send the contents of associated buffers immediately, or
 541          * map them for the peer to suck/blow... */
 542 #if MULTIRAIL_EKC
 543         kqswnal_data.kqn_ep_tx_nmh =
 544                 ep_dvma_reserve(kqswnal_data.kqn_ep,
 545                                 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
 546                                 EP_PERM_WRITE);
 547         if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
 548                 CERROR("Can't reserve tx dma space\n");
 549                 kqswnal_finalise();
 550                 return (-ENOMEM);
 551         }
 552 #else
 553         dmareq.Waitfn   = DDI_DMA_SLEEP;
 554         dmareq.ElanAddr = (E3_Addr) 0;
 555         dmareq.Attr     = PTE_LOAD_LITTLE_ENDIAN;
 556         dmareq.Perm     = ELAN_PERM_REMOTEWRITE;
 557
 558         rc = elan3_dma_reserve(kqswnal_data.kqn_ep->DmaState,
 559                               KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
 560                               &dmareq, &kqswnal_data.kqn_eptxdmahandle);
 561         if (rc != DDI_SUCCESS)
 562         {
 563                 CERROR ("Can't reserve rx dma space\n");
 564                 kqswnal_finalise ();
 565                 return (-ENOMEM);
 566         }
 567 #endif
 568         /**********************************************************************/
 569         /* Reserve Elan address space for receive buffers */
 570 #if MULTIRAIL_EKC
 571         kqswnal_data.kqn_ep_rx_nmh =
 572                 ep_dvma_reserve(kqswnal_data.kqn_ep,
 573                                 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
 574                                 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
 575                                 EP_PERM_WRITE);
 576         if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
 577                 CERROR("Can't reserve rx dma space\n");
 578                 kqswnal_finalise();
 579                 return (-ENOMEM);
 580         }
 581 #else
 582         dmareq.Waitfn   = DDI_DMA_SLEEP;
 583         dmareq.ElanAddr = (E3_Addr) 0;
 584         dmareq.Attr     = PTE_LOAD_LITTLE_ENDIAN;
 585         dmareq.Perm     = ELAN_PERM_REMOTEWRITE;
 586
 587         rc = elan3_dma_reserve (kqswnal_data.kqn_ep->DmaState,
 588                                 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
 589                                 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
 590                                 &dmareq, &kqswnal_data.kqn_eprxdmahandle);
 591         if (rc != DDI_SUCCESS)
 592         {
 593                 CERROR ("Can't reserve rx dma space\n");
 594                 kqswnal_finalise ();
 595                 return (-ENOMEM);
 596         }
 597 #endif
 598         /**********************************************************************/
 599         /* Allocate/Initialise transmit descriptors */
 600
 601         kqswnal_data.kqn_txds = NULL;
 602         for (i = 0; i < (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS); i++)
 603         {
 604                 int           premapped_pages;
 605                 int           basepage = i * KQSW_NTXMSGPAGES;
 606
 607                 PORTAL_ALLOC (ktx, sizeof(*ktx));
 608                 if (ktx == NULL) {
 609                         kqswnal_finalise ();
 610                         return (-ENOMEM);
 611                 }
 612
 613                 ktx->ktx_alloclist = kqswnal_data.kqn_txds;
 614                 kqswnal_data.kqn_txds = ktx;
 615
 616                 PORTAL_ALLOC (ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
 617                 if (ktx->ktx_buffer == NULL)
 618                 {
 619                         kqswnal_finalise ();
 620                         return (-ENOMEM);
 621                 }
 622
 623                 /* Map pre-allocated buffer NOW, to save latency on transmit */
 624                 premapped_pages = kqswnal_pages_spanned(ktx->ktx_buffer,
 625                                                         KQSW_TX_BUFFER_SIZE);
 626 #if MULTIRAIL_EKC
 627                 ep_dvma_load(kqswnal_data.kqn_ep, NULL,
 628                              ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
 629                              kqswnal_data.kqn_ep_tx_nmh, basepage,
 630                              &all_rails, &ktx->ktx_ebuffer);
 631 #else
 632                 elan3_dvma_kaddr_load (kqswnal_data.kqn_ep->DmaState,
 633                                        kqswnal_data.kqn_eptxdmahandle,
 634                                        ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
 635                                        basepage, &ktx->ktx_ebuffer);
 636 #endif
 637                 ktx->ktx_basepage = basepage + premapped_pages; /* message mapping starts here */
 638                 ktx->ktx_npages = KQSW_NTXMSGPAGES - premapped_pages; /* for this many pages */
 639
 640                 INIT_LIST_HEAD (&ktx->ktx_delayed_list);
 641
 642                 ktx->ktx_state = KTX_IDLE;
 643                 ktx->ktx_isnblk = (i >= KQSW_NTXMSGS);
 644                 list_add_tail (&ktx->ktx_list,
 645                                ktx->ktx_isnblk ? &kqswnal_data.kqn_nblk_idletxds :
 646                                                  &kqswnal_data.kqn_idletxds);
 647         }
 648
 649         /**********************************************************************/
 650         /* Allocate/Initialise receive descriptors */
 651
 652         kqswnal_data.kqn_rxds = NULL;
 653         elan_page_idx = 0;
 654         for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
 655         {
 656 #if MULTIRAIL_EKC
 657                 EP_NMD        elanbuffer;
 658 #else
 659                 E3_Addr       elanbuffer;
 660 #endif
 661                 int           j;
 662
 663                 PORTAL_ALLOC(krx, sizeof(*krx));
 664                 if (krx == NULL) {
 665                         kqswnal_finalise();
 666                         return (-ENOSPC);
 667                 }
 668
 669                 krx->krx_alloclist = kqswnal_data.kqn_rxds;
 670                 kqswnal_data.kqn_rxds = krx;
 671
 672                 if (i < KQSW_NRXMSGS_SMALL)
 673                 {
 674                         krx->krx_npages = KQSW_NRXMSGPAGES_SMALL;
 675                         krx->krx_eprx   = kqswnal_data.kqn_eprx_small;
 676                 }
 677                 else
 678                 {
 679                         krx->krx_npages = KQSW_NRXMSGPAGES_LARGE;
 680                         krx->krx_eprx   = kqswnal_data.kqn_eprx_large;
 681                 }
 682
 683                 LASSERT (krx->krx_npages > 0);
 684                 for (j = 0; j < krx->krx_npages; j++)
 685                 {
 686                         struct page *page = alloc_page(GFP_KERNEL);
 687
 688                         if (page == NULL) {
 689                                 kqswnal_finalise ();
 690                                 return (-ENOMEM);
 691                         }
 692
 693                         krx->krx_kiov[j].kiov_page = page;
 694                         LASSERT(page_address(page) != NULL);
 695
 696 #if MULTIRAIL_EKC
 697                         ep_dvma_load(kqswnal_data.kqn_ep, NULL,
 698                                      page_address(page),
 699                                      PAGE_SIZE, kqswnal_data.kqn_ep_rx_nmh,
 700                                      elan_page_idx, &all_rails, &elanbuffer);
 701
 702                         if (j == 0) {
 703                                 krx->krx_elanbuffer = elanbuffer;
 704                         } else {
 705                                 rc = ep_nmd_merge(&krx->krx_elanbuffer,
 706                                                   &krx->krx_elanbuffer,
 707                                                   &elanbuffer);
 708                                 /* NB contiguous mapping */
 709                                 LASSERT(rc);
 710                         }
 711 #else
 712                         elan3_dvma_kaddr_load(kqswnal_data.kqn_ep->DmaState,
 713                                               kqswnal_data.kqn_eprxdmahandle,
 714                                               page_address(page),
 715                                               PAGE_SIZE, elan_page_idx,
 716                                               &elanbuffer);
 717                         if (j == 0)
 718                                 krx->krx_elanbuffer = elanbuffer;
 719
 720                         /* NB contiguous mapping */
 721                         LASSERT (elanbuffer == krx->krx_elanbuffer + j * PAGE_SIZE);
 722 #endif
 723                         elan_page_idx++;
 724
 725                 }
 726         }
 727         LASSERT (elan_page_idx ==
 728                  (KQSW_NRXMSGS_SMALL * KQSW_NRXMSGPAGES_SMALL) +
 729                  (KQSW_NRXMSGS_LARGE * KQSW_NRXMSGPAGES_LARGE));
 730
 731         /**********************************************************************/
 732         /* Network interface ready to initialise */
 733
 734         rc = PtlNIInit(kqswnal_init, 32, 4, 0, &kqswnal_ni);
 735         if (rc != 0)
 736         {
 737                 CERROR ("PtlNIInit failed %d\n", rc);
 738                 kqswnal_finalise ();
 739                 return (-ENOMEM);
 740         }
 741
 742         kqswnal_data.kqn_init = KQN_INIT_PTL;
 743
 744         /**********************************************************************/
 745         /* Queue receives, now that it's OK to run their completion callbacks */
 746
 747         for (krx = kqswnal_data.kqn_rxds; krx != NULL; krx =krx->krx_alloclist){
 748                 /* NB this enqueue can allocate/sleep (attr == 0) */
 749 #if MULTIRAIL_EKC
 750                 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
 751                                       &krx->krx_elanbuffer, 0);
 752 #else
 753                 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
 754                                       krx->krx_elanbuffer,
 755                                       krx->krx_npages * PAGE_SIZE, 0);
 756 #endif
 757                 if (rc != EP_SUCCESS)
 758                 {
 759                         CERROR ("failed ep_queue_receive %d\n", rc);
 760                         kqswnal_finalise ();
 761                         return (-ENOMEM);
 762                 }
 763         }
 764
 765         /**********************************************************************/
 766         /* Spawn scheduling threads */
 767         for (i = 0; i < num_online_cpus(); i++) {
 768                 rc = kqswnal_thread_start (kqswnal_scheduler, NULL);
 769                 if (rc != 0)
 770                 {
 771                         CERROR ("failed to spawn scheduling thread: %d\n", rc);
 772                         kqswnal_finalise ();
 773                         return (rc);
 774                 }
 775         }
 776
 777         /**********************************************************************/
 778         /* Connect to the router */
 779         rc = kpr_register (&kqswnal_data.kqn_router, &kqswnal_router_interface);
 780         CDEBUG(D_NET, "Can't initialise routing interface (rc = %d): not routing\n",rc);
 781
 782         rc = kportal_nal_register (QSWNAL, &kqswnal_cmd, NULL);
 783         if (rc != 0) {
 784                 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
 785                 kqswnal_finalise ();
 786                 return (rc);
 787         }
 788
 789 #if CONFIG_SYSCTL
 790         /* Press on regardless even if registering sysctl doesn't work */
 791         kqswnal_data.kqn_sysctl = register_sysctl_table (kqswnal_top_ctl_table, 0);
 792 #endif
 793
 794         PORTAL_SYMBOL_REGISTER(kqswnal_ni);
 795         kqswnal_data.kqn_init = KQN_INIT_ALL;
 796
 797         printk(KERN_INFO "Lustre: Routing QSW NAL loaded on node %d of %d "
 798                "(Routing %s, initial mem %d)\n",
 799                kqswnal_data.kqn_elanid, kqswnal_data.kqn_nnodes,
 800                kpr_routing (&kqswnal_data.kqn_router) ? "enabled" : "disabled",
 801                pkmem);
 802
 803         return (0);
 804 }
 805
 806
 807 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 808 MODULE_DESCRIPTION("Kernel Quadrics/Elan NAL v1.01");
 809 MODULE_LICENSE("GPL");
 810
 811 module_init (kqswnal_initialise);
 812 module_exit (kqswnal_finalise);
 813
 814 EXPORT_SYMBOL (kqswnal_ni);