lustre/portals/knals/qswnal/qswnal.c

   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 (current->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         switch (kqswnal_data.kqn_init)
 197         {
 198         default:
 199                 LASSERT (0);
 200
 201         case KQN_INIT_ALL:
 202 #if CONFIG_SYSCTL
 203                 if (kqswnal_data.kqn_sysctl != NULL)
 204                         unregister_sysctl_table (kqswnal_data.kqn_sysctl);
 205 #endif
 206                 PORTAL_SYMBOL_UNREGISTER (kqswnal_ni);
 207                 kportal_nal_unregister(QSWNAL);
 208                 /* fall through */
 209
 210         case KQN_INIT_PTL:
 211                 PtlNIFini (kqswnal_ni);
 212                 lib_fini (&kqswnal_lib);
 213                 /* fall through */
 214
 215         case KQN_INIT_DATA:
 216                 LASSERT(list_empty(&kqswnal_data.kqn_activetxds));
 217                 break;
 218
 219         case KQN_INIT_NOTHING:
 220                 return;
 221         }
 222
 223         /**********************************************************************/
 224         /* Make router stop her calling me and fail any more call-ins */
 225         kpr_shutdown (&kqswnal_data.kqn_router);
 226
 227         /**********************************************************************/
 228         /* flag threads we've started to terminate and wait for all to ack */
 229
 230         kqswnal_data.kqn_shuttingdown = 1;
 231         wake_up_all (&kqswnal_data.kqn_sched_waitq);
 232
 233         while (atomic_read (&kqswnal_data.kqn_nthreads_running) != 0) {
 234                 CDEBUG(D_NET, "waiting for %d threads to start shutting down\n",
 235                        atomic_read (&kqswnal_data.kqn_nthreads_running));
 236                 set_current_state (TASK_UNINTERRUPTIBLE);
 237                 schedule_timeout (HZ);
 238         }
 239
 240         /**********************************************************************/
 241         /* close elan comms */
 242 #if MULTIRAIL_EKC
 243         if (kqswnal_data.kqn_eprx_small != NULL)
 244                 ep_free_rcvr (kqswnal_data.kqn_eprx_small);
 245
 246         if (kqswnal_data.kqn_eprx_large != NULL)
 247                 ep_free_rcvr (kqswnal_data.kqn_eprx_large);
 248
 249         if (kqswnal_data.kqn_eptx != NULL)
 250                 ep_free_xmtr (kqswnal_data.kqn_eptx);
 251 #else
 252         if (kqswnal_data.kqn_eprx_small != NULL)
 253                 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_small);
 254
 255         if (kqswnal_data.kqn_eprx_large != NULL)
 256                 ep_remove_large_rcvr (kqswnal_data.kqn_eprx_large);
 257
 258         if (kqswnal_data.kqn_eptx != NULL)
 259                 ep_free_large_xmtr (kqswnal_data.kqn_eptx);
 260 #endif
 261         /**********************************************************************/
 262         /* flag threads to terminate, wake them and wait for them to die */
 263
 264         kqswnal_data.kqn_shuttingdown = 2;
 265         wake_up_all (&kqswnal_data.kqn_sched_waitq);
 266
 267         while (atomic_read (&kqswnal_data.kqn_nthreads) != 0) {
 268                 CDEBUG(D_NET, "waiting for %d threads to terminate\n",
 269                        atomic_read (&kqswnal_data.kqn_nthreads));
 270                 set_current_state (TASK_UNINTERRUPTIBLE);
 271                 schedule_timeout (HZ);
 272         }
 273
 274         /**********************************************************************/
 275         /* No more threads.  No more portals, router or comms callbacks!
 276          * I control the horizontals and the verticals...
 277          */
 278
 279 #if MULTIRAIL_EKC
 280         LASSERT (list_empty (&kqswnal_data.kqn_readyrxds));
 281 #endif
 282
 283         /**********************************************************************/
 284         /* Complete any blocked forwarding packets with error
 285          */
 286
 287         while (!list_empty (&kqswnal_data.kqn_idletxd_fwdq))
 288         {
 289                 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_idletxd_fwdq.next,
 290                                                   kpr_fwd_desc_t, kprfd_list);
 291                 list_del (&fwd->kprfd_list);
 292                 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
 293         }
 294
 295         while (!list_empty (&kqswnal_data.kqn_delayedfwds))
 296         {
 297                 kpr_fwd_desc_t *fwd = list_entry (kqswnal_data.kqn_delayedfwds.next,
 298                                                   kpr_fwd_desc_t, kprfd_list);
 299                 list_del (&fwd->kprfd_list);
 300                 kpr_fwd_done (&kqswnal_data.kqn_router, fwd, -EHOSTUNREACH);
 301         }
 302
 303         /**********************************************************************/
 304         /* Wait for router to complete any packets I sent her
 305          */
 306
 307         kpr_deregister (&kqswnal_data.kqn_router);
 308
 309
 310         /**********************************************************************/
 311         /* Unmap message buffers and free all descriptors and buffers
 312          */
 313
 314 #if MULTIRAIL_EKC
 315         /* FTTB, we need to unmap any remaining mapped memory.  When
 316          * ep_dvma_release() get fixed (and releases any mappings in the
 317          * region), we can delete all the code from here -------->  */
 318
 319         if (kqswnal_data.kqn_txds != NULL) {
 320                 int  i;
 321
 322                 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++) {
 323                         kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
 324
 325                         /* If ktx has a buffer, it got mapped; unmap now.
 326                          * NB only the pre-mapped stuff is still mapped
 327                          * since all tx descs must be idle */
 328
 329                         if (ktx->ktx_buffer != NULL)
 330                                 ep_dvma_unload(kqswnal_data.kqn_ep,
 331                                                kqswnal_data.kqn_ep_tx_nmh,
 332                                                &ktx->ktx_ebuffer);
 333                 }
 334         }
 335
 336         if (kqswnal_data.kqn_rxds != NULL) {
 337                 int   i;
 338
 339                 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++) {
 340                         kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
 341
 342                         /* If krx_pages[0] got allocated, it got mapped.
 343                          * NB subsequent pages get merged */
 344
 345                         if (krx->krx_pages[0] != NULL)
 346                                 ep_dvma_unload(kqswnal_data.kqn_ep,
 347                                                kqswnal_data.kqn_ep_rx_nmh,
 348                                                &krx->krx_elanbuffer);
 349                 }
 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         if (kqswnal_data.kqn_txds != NULL)
 383         {
 384                 int   i;
 385
 386                 for (i = 0; i < KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS; i++)
 387                 {
 388                         kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
 389
 390                         if (ktx->ktx_buffer != NULL)
 391                                 PORTAL_FREE(ktx->ktx_buffer,
 392                                             KQSW_TX_BUFFER_SIZE);
 393                 }
 394
 395                 PORTAL_FREE(kqswnal_data.kqn_txds,
 396                             sizeof (kqswnal_tx_t) * (KQSW_NTXMSGS +
 397                                                      KQSW_NNBLK_TXMSGS));
 398         }
 399
 400         if (kqswnal_data.kqn_rxds != NULL)
 401         {
 402                 int   i;
 403                 int   j;
 404
 405                 for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
 406                 {
 407                         kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
 408
 409                         for (j = 0; j < krx->krx_npages; j++)
 410                                 if (krx->krx_pages[j] != NULL)
 411                                         __free_page (krx->krx_pages[j]);
 412                 }
 413
 414                 PORTAL_FREE(kqswnal_data.kqn_rxds,
 415                             sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL +
 416                                                     KQSW_NRXMSGS_LARGE));
 417         }
 418
 419         /* resets flags, pointers to NULL etc */
 420         memset(&kqswnal_data, 0, sizeof (kqswnal_data));
 421
 422         CDEBUG (D_MALLOC, "done kmem %d\n", atomic_read(&portal_kmemory));
 423
 424         printk (KERN_INFO "Lustre: Routing QSW NAL unloaded (final mem %d)\n",
 425                 atomic_read(&portal_kmemory));
 426 }
 427
 428 static int __init
 429 kqswnal_initialise (void)
 430 {
 431 #if MULTIRAIL_EKC
 432         EP_RAILMASK       all_rails = EP_RAILMASK_ALL;
 433 #else
 434         ELAN3_DMA_REQUEST dmareq;
 435 #endif
 436         int               rc;
 437         int               i;
 438         int               elan_page_idx;
 439         int               pkmem = atomic_read(&portal_kmemory);
 440
 441         LASSERT (kqswnal_data.kqn_init == KQN_INIT_NOTHING);
 442
 443         CDEBUG (D_MALLOC, "start kmem %d\n", atomic_read(&portal_kmemory));
 444
 445         kqswnal_api.forward  = kqswnal_forward;
 446         kqswnal_api.shutdown = kqswnal_shutdown;
 447         kqswnal_api.yield    = kqswnal_yield;
 448         kqswnal_api.validate = NULL;            /* our api validate is a NOOP */
 449         kqswnal_api.lock     = kqswnal_lock;
 450         kqswnal_api.unlock   = kqswnal_unlock;
 451         kqswnal_api.nal_data = &kqswnal_data;
 452
 453         kqswnal_lib.nal_data = &kqswnal_data;
 454
 455         memset(&kqswnal_rpc_success, 0, sizeof(kqswnal_rpc_success));
 456         memset(&kqswnal_rpc_failed, 0, sizeof(kqswnal_rpc_failed));
 457 #if MULTIRAIL_EKC
 458         kqswnal_rpc_failed.Data[0] = -ECONNREFUSED;
 459 #else
 460         kqswnal_rpc_failed.Status = -ECONNREFUSED;
 461 #endif
 462         /* ensure all pointers NULL etc */
 463         memset (&kqswnal_data, 0, sizeof (kqswnal_data));
 464
 465         kqswnal_data.kqn_optimized_gets = KQSW_OPTIMIZED_GETS;
 466         kqswnal_data.kqn_copy_small_fwd = KQSW_COPY_SMALL_FWD;
 467
 468         kqswnal_data.kqn_cb = &kqswnal_lib;
 469
 470         INIT_LIST_HEAD (&kqswnal_data.kqn_idletxds);
 471         INIT_LIST_HEAD (&kqswnal_data.kqn_nblk_idletxds);
 472         INIT_LIST_HEAD (&kqswnal_data.kqn_activetxds);
 473         spin_lock_init (&kqswnal_data.kqn_idletxd_lock);
 474         init_waitqueue_head (&kqswnal_data.kqn_idletxd_waitq);
 475         INIT_LIST_HEAD (&kqswnal_data.kqn_idletxd_fwdq);
 476
 477         INIT_LIST_HEAD (&kqswnal_data.kqn_delayedfwds);
 478         INIT_LIST_HEAD (&kqswnal_data.kqn_delayedtxds);
 479         INIT_LIST_HEAD (&kqswnal_data.kqn_readyrxds);
 480
 481         spin_lock_init (&kqswnal_data.kqn_sched_lock);
 482         init_waitqueue_head (&kqswnal_data.kqn_sched_waitq);
 483
 484         spin_lock_init (&kqswnal_data.kqn_statelock);
 485
 486         /* pointers/lists/locks initialised */
 487         kqswnal_data.kqn_init = KQN_INIT_DATA;
 488
 489 #if MULTIRAIL_EKC
 490         kqswnal_data.kqn_ep = ep_system();
 491         if (kqswnal_data.kqn_ep == NULL) {
 492                 CERROR("Can't initialise EKC\n");
 493                 return (-ENODEV);
 494         }
 495
 496         if (ep_waitfor_nodeid(kqswnal_data.kqn_ep) == ELAN_INVALID_NODE) {
 497                 CERROR("Can't get elan ID\n");
 498                 kqswnal_finalise();
 499                 return (-ENODEV);
 500         }
 501 #else
 502         /**********************************************************************/
 503         /* Find the first Elan device */
 504
 505         kqswnal_data.kqn_ep = ep_device (0);
 506         if (kqswnal_data.kqn_ep == NULL)
 507         {
 508                 CERROR ("Can't get elan device 0\n");
 509                 return (-ENODEV);
 510         }
 511 #endif
 512
 513         kqswnal_data.kqn_nid_offset = 0;
 514         kqswnal_data.kqn_nnodes     = ep_numnodes (kqswnal_data.kqn_ep);
 515         kqswnal_data.kqn_elanid     = ep_nodeid (kqswnal_data.kqn_ep);
 516
 517         /**********************************************************************/
 518         /* Get the transmitter */
 519
 520         kqswnal_data.kqn_eptx = ep_alloc_xmtr (kqswnal_data.kqn_ep);
 521         if (kqswnal_data.kqn_eptx == NULL)
 522         {
 523                 CERROR ("Can't allocate transmitter\n");
 524                 kqswnal_finalise ();
 525                 return (-ENOMEM);
 526         }
 527
 528         /**********************************************************************/
 529         /* Get the receivers */
 530
 531         kqswnal_data.kqn_eprx_small = ep_alloc_rcvr (kqswnal_data.kqn_ep,
 532                                                      EP_MSG_SVC_PORTALS_SMALL,
 533                                                      KQSW_EP_ENVELOPES_SMALL);
 534         if (kqswnal_data.kqn_eprx_small == NULL)
 535         {
 536                 CERROR ("Can't install small msg receiver\n");
 537                 kqswnal_finalise ();
 538                 return (-ENOMEM);
 539         }
 540
 541         kqswnal_data.kqn_eprx_large = ep_alloc_rcvr (kqswnal_data.kqn_ep,
 542                                                      EP_MSG_SVC_PORTALS_LARGE,
 543                                                      KQSW_EP_ENVELOPES_LARGE);
 544         if (kqswnal_data.kqn_eprx_large == NULL)
 545         {
 546                 CERROR ("Can't install large msg receiver\n");
 547                 kqswnal_finalise ();
 548                 return (-ENOMEM);
 549         }
 550
 551         /**********************************************************************/
 552         /* Reserve Elan address space for transmit descriptors NB we may
 553          * either send the contents of associated buffers immediately, or
 554          * map them for the peer to suck/blow... */
 555 #if MULTIRAIL_EKC
 556         kqswnal_data.kqn_ep_tx_nmh =
 557                 ep_dvma_reserve(kqswnal_data.kqn_ep,
 558                                 KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
 559                                 EP_PERM_WRITE);
 560         if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
 561                 CERROR("Can't reserve tx dma space\n");
 562                 kqswnal_finalise();
 563                 return (-ENOMEM);
 564         }
 565 #else
 566         dmareq.Waitfn   = DDI_DMA_SLEEP;
 567         dmareq.ElanAddr = (E3_Addr) 0;
 568         dmareq.Attr     = PTE_LOAD_LITTLE_ENDIAN;
 569         dmareq.Perm     = ELAN_PERM_REMOTEWRITE;
 570
 571         rc = elan3_dma_reserve(kqswnal_data.kqn_ep->DmaState,
 572                               KQSW_NTXMSGPAGES*(KQSW_NTXMSGS+KQSW_NNBLK_TXMSGS),
 573                               &dmareq, &kqswnal_data.kqn_eptxdmahandle);
 574         if (rc != DDI_SUCCESS)
 575         {
 576                 CERROR ("Can't reserve rx dma space\n");
 577                 kqswnal_finalise ();
 578                 return (-ENOMEM);
 579         }
 580 #endif
 581         /**********************************************************************/
 582         /* Reserve Elan address space for receive buffers */
 583 #if MULTIRAIL_EKC
 584         kqswnal_data.kqn_ep_rx_nmh =
 585                 ep_dvma_reserve(kqswnal_data.kqn_ep,
 586                                 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
 587                                 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
 588                                 EP_PERM_WRITE);
 589         if (kqswnal_data.kqn_ep_tx_nmh == NULL) {
 590                 CERROR("Can't reserve rx dma space\n");
 591                 kqswnal_finalise();
 592                 return (-ENOMEM);
 593         }
 594 #else
 595         dmareq.Waitfn   = DDI_DMA_SLEEP;
 596         dmareq.ElanAddr = (E3_Addr) 0;
 597         dmareq.Attr     = PTE_LOAD_LITTLE_ENDIAN;
 598         dmareq.Perm     = ELAN_PERM_REMOTEWRITE;
 599
 600         rc = elan3_dma_reserve (kqswnal_data.kqn_ep->DmaState,
 601                                 KQSW_NRXMSGPAGES_SMALL * KQSW_NRXMSGS_SMALL +
 602                                 KQSW_NRXMSGPAGES_LARGE * KQSW_NRXMSGS_LARGE,
 603                                 &dmareq, &kqswnal_data.kqn_eprxdmahandle);
 604         if (rc != DDI_SUCCESS)
 605         {
 606                 CERROR ("Can't reserve rx dma space\n");
 607                 kqswnal_finalise ();
 608                 return (-ENOMEM);
 609         }
 610 #endif
 611         /**********************************************************************/
 612         /* Allocate/Initialise transmit descriptors */
 613
 614         PORTAL_ALLOC(kqswnal_data.kqn_txds,
 615                      sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
 616         if (kqswnal_data.kqn_txds == NULL)
 617         {
 618                 kqswnal_finalise ();
 619                 return (-ENOMEM);
 620         }
 621
 622         /* clear flags, null pointers etc */
 623         memset(kqswnal_data.kqn_txds, 0,
 624                sizeof(kqswnal_tx_t) * (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS));
 625         for (i = 0; i < (KQSW_NTXMSGS + KQSW_NNBLK_TXMSGS); i++)
 626         {
 627                 int           premapped_pages;
 628                 kqswnal_tx_t *ktx = &kqswnal_data.kqn_txds[i];
 629                 int           basepage = i * KQSW_NTXMSGPAGES;
 630
 631                 PORTAL_ALLOC (ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE);
 632                 if (ktx->ktx_buffer == NULL)
 633                 {
 634                         kqswnal_finalise ();
 635                         return (-ENOMEM);
 636                 }
 637
 638                 /* Map pre-allocated buffer NOW, to save latency on transmit */
 639                 premapped_pages = kqswnal_pages_spanned(ktx->ktx_buffer,
 640                                                         KQSW_TX_BUFFER_SIZE);
 641 #if MULTIRAIL_EKC
 642                 ep_dvma_load(kqswnal_data.kqn_ep, NULL,
 643                              ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
 644                              kqswnal_data.kqn_ep_tx_nmh, basepage,
 645                              &all_rails, &ktx->ktx_ebuffer);
 646 #else
 647                 elan3_dvma_kaddr_load (kqswnal_data.kqn_ep->DmaState,
 648                                        kqswnal_data.kqn_eptxdmahandle,
 649                                        ktx->ktx_buffer, KQSW_TX_BUFFER_SIZE,
 650                                        basepage, &ktx->ktx_ebuffer);
 651 #endif
 652                 ktx->ktx_basepage = basepage + premapped_pages; /* message mapping starts here */
 653                 ktx->ktx_npages = KQSW_NTXMSGPAGES - premapped_pages; /* for this many pages */
 654
 655                 INIT_LIST_HEAD (&ktx->ktx_delayed_list);
 656
 657                 ktx->ktx_state = KTX_IDLE;
 658                 ktx->ktx_isnblk = (i >= KQSW_NTXMSGS);
 659                 list_add_tail (&ktx->ktx_list,
 660                                ktx->ktx_isnblk ? &kqswnal_data.kqn_nblk_idletxds :
 661                                                  &kqswnal_data.kqn_idletxds);
 662         }
 663
 664         /**********************************************************************/
 665         /* Allocate/Initialise receive descriptors */
 666
 667         PORTAL_ALLOC (kqswnal_data.kqn_rxds,
 668                       sizeof (kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE));
 669         if (kqswnal_data.kqn_rxds == NULL)
 670         {
 671                 kqswnal_finalise ();
 672                 return (-ENOMEM);
 673         }
 674
 675         memset(kqswnal_data.kqn_rxds, 0, /* clear flags, null pointers etc */
 676                sizeof(kqswnal_rx_t) * (KQSW_NRXMSGS_SMALL+KQSW_NRXMSGS_LARGE));
 677
 678         elan_page_idx = 0;
 679         for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
 680         {
 681 #if MULTIRAIL_EKC
 682                 EP_NMD        elanbuffer;
 683 #else
 684                 E3_Addr       elanbuffer;
 685 #endif
 686                 int           j;
 687                 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
 688
 689                 if (i < KQSW_NRXMSGS_SMALL)
 690                 {
 691                         krx->krx_npages = KQSW_NRXMSGPAGES_SMALL;
 692                         krx->krx_eprx   = kqswnal_data.kqn_eprx_small;
 693                 }
 694                 else
 695                 {
 696                         krx->krx_npages = KQSW_NRXMSGPAGES_LARGE;
 697                         krx->krx_eprx   = kqswnal_data.kqn_eprx_large;
 698                 }
 699
 700                 LASSERT (krx->krx_npages > 0);
 701                 for (j = 0; j < krx->krx_npages; j++)
 702                 {
 703                         krx->krx_pages[j] = alloc_page(GFP_KERNEL);
 704                         if (krx->krx_pages[j] == NULL)
 705                         {
 706                                 kqswnal_finalise ();
 707                                 return (-ENOMEM);
 708                         }
 709
 710                         LASSERT(page_address(krx->krx_pages[j]) != NULL);
 711
 712 #if MULTIRAIL_EKC
 713                         ep_dvma_load(kqswnal_data.kqn_ep, NULL,
 714                                      page_address(krx->krx_pages[j]),
 715                                      PAGE_SIZE, kqswnal_data.kqn_ep_rx_nmh,
 716                                      elan_page_idx, &all_rails, &elanbuffer);
 717
 718                         if (j == 0) {
 719                                 krx->krx_elanbuffer = elanbuffer;
 720                         } else {
 721                                 rc = ep_nmd_merge(&krx->krx_elanbuffer,
 722                                                   &krx->krx_elanbuffer,
 723                                                   &elanbuffer);
 724                                 /* NB contiguous mapping */
 725                                 LASSERT(rc);
 726                         }
 727 #else
 728                         elan3_dvma_kaddr_load(kqswnal_data.kqn_ep->DmaState,
 729                                               kqswnal_data.kqn_eprxdmahandle,
 730                                               page_address(krx->krx_pages[j]),
 731                                               PAGE_SIZE, elan_page_idx,
 732                                               &elanbuffer);
 733                         if (j == 0)
 734                                 krx->krx_elanbuffer = elanbuffer;
 735
 736                         /* NB contiguous mapping */
 737                         LASSERT (elanbuffer == krx->krx_elanbuffer + j * PAGE_SIZE);
 738 #endif
 739                         elan_page_idx++;
 740
 741                 }
 742         }
 743         LASSERT (elan_page_idx ==
 744                  (KQSW_NRXMSGS_SMALL * KQSW_NRXMSGPAGES_SMALL) +
 745                  (KQSW_NRXMSGS_LARGE * KQSW_NRXMSGPAGES_LARGE));
 746
 747         /**********************************************************************/
 748         /* Network interface ready to initialise */
 749
 750         rc = PtlNIInit(kqswnal_init, 32, 4, 0, &kqswnal_ni);
 751         if (rc != 0)
 752         {
 753                 CERROR ("PtlNIInit failed %d\n", rc);
 754                 kqswnal_finalise ();
 755                 return (-ENOMEM);
 756         }
 757
 758         kqswnal_data.kqn_init = KQN_INIT_PTL;
 759
 760         /**********************************************************************/
 761         /* Queue receives, now that it's OK to run their completion callbacks */
 762
 763         for (i = 0; i < KQSW_NRXMSGS_SMALL + KQSW_NRXMSGS_LARGE; i++)
 764         {
 765                 kqswnal_rx_t *krx = &kqswnal_data.kqn_rxds[i];
 766
 767                 /* NB this enqueue can allocate/sleep (attr == 0) */
 768 #if MULTIRAIL_EKC
 769                 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
 770                                       &krx->krx_elanbuffer, 0);
 771 #else
 772                 rc = ep_queue_receive(krx->krx_eprx, kqswnal_rxhandler, krx,
 773                                       krx->krx_elanbuffer,
 774                                       krx->krx_npages * PAGE_SIZE, 0);
 775 #endif
 776                 if (rc != EP_SUCCESS)
 777                 {
 778                         CERROR ("failed ep_queue_receive %d\n", rc);
 779                         kqswnal_finalise ();
 780                         return (-ENOMEM);
 781                 }
 782         }
 783
 784         /**********************************************************************/
 785         /* Spawn scheduling threads */
 786         for (i = 0; i < smp_num_cpus; i++)
 787         {
 788                 rc = kqswnal_thread_start (kqswnal_scheduler, NULL);
 789                 if (rc != 0)
 790                 {
 791                         CERROR ("failed to spawn scheduling thread: %d\n", rc);
 792                         kqswnal_finalise ();
 793                         return (rc);
 794                 }
 795         }
 796
 797         /**********************************************************************/
 798         /* Connect to the router */
 799         rc = kpr_register (&kqswnal_data.kqn_router, &kqswnal_router_interface);
 800         CDEBUG(D_NET, "Can't initialise routing interface (rc = %d): not routing\n",rc);
 801
 802         rc = kportal_nal_register (QSWNAL, &kqswnal_cmd, NULL);
 803         if (rc != 0) {
 804                 CERROR ("Can't initialise command interface (rc = %d)\n", rc);
 805                 kqswnal_finalise ();
 806                 return (rc);
 807         }
 808
 809 #if CONFIG_SYSCTL
 810         /* Press on regardless even if registering sysctl doesn't work */
 811         kqswnal_data.kqn_sysctl = register_sysctl_table (kqswnal_top_ctl_table, 0);
 812 #endif
 813
 814         PORTAL_SYMBOL_REGISTER(kqswnal_ni);
 815         kqswnal_data.kqn_init = KQN_INIT_ALL;
 816
 817         printk(KERN_INFO "Lustre: Routing QSW NAL loaded on node %d of %d "
 818                "(Routing %s, initial mem %d)\n",
 819                kqswnal_data.kqn_elanid, kqswnal_data.kqn_nnodes,
 820                kpr_routing (&kqswnal_data.kqn_router) ? "enabled" : "disabled",
 821                pkmem);
 822
 823         return (0);
 824 }
 825
 826
 827 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 828 MODULE_DESCRIPTION("Kernel Quadrics/Elan NAL v1.01");
 829 MODULE_LICENSE("GPL");
 830
 831 module_init (kqswnal_initialise);
 832 module_exit (kqswnal_finalise);
 833
 834 EXPORT_SYMBOL (kqswnal_ni);