drivers/scsi/isci/remote_node_table.c

   1 /*
   2  * This file is provided under a dual BSD/GPLv2 license.  When using or
   3  * redistributing this file, you may do so under either license.
   4  *
   5  * GPL LICENSE SUMMARY
   6  *
   7  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * BSD LICENSE
  25  *
  26  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
  27  * All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  *
  33  *   * Redistributions of source code must retain the above copyright
  34  *     notice, this list of conditions and the following disclaimer.
  35  *   * Redistributions in binary form must reproduce the above copyright
  36  *     notice, this list of conditions and the following disclaimer in
  37  *     the documentation and/or other materials provided with the
  38  *     distribution.
  39  *   * Neither the name of Intel Corporation nor the names of its
  40  *     contributors may be used to endorse or promote products derived
  41  *     from this software without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  44  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  45  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  46  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  47  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  53  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  */
  55
  56 /**
  57  * This file contains the implementation of the SCIC_SDS_REMOTE_NODE_TABLE
  58  *    public, protected, and private methods.
  59  *
  60  *
  61  */
  62 #include "remote_node_table.h"
  63 #include "remote_node_context.h"
  64
  65 /**
  66  *
  67  * @remote_node_table: This is the remote node index table from which the
  68  *    selection will be made.
  69  * @group_table_index: This is the index to the group table from which to
  70  *    search for an available selection.
  71  *
  72  * This routine will find the bit position in absolute bit terms of the next 32
  73  * + bit position.  If there are available bits in the first u32 then it is
  74  * just bit position. u32 This is the absolute bit position for an available
  75  * group.
  76  */
  77 static u32 sci_remote_node_table_get_group_index(
  78         struct sci_remote_node_table *remote_node_table,
  79         u32 group_table_index)
  80 {
  81         u32 dword_index;
  82         u32 *group_table;
  83         u32 bit_index;
  84
  85         group_table = remote_node_table->remote_node_groups[group_table_index];
  86
  87         for (dword_index = 0; dword_index < remote_node_table->group_array_size; dword_index++) {
  88                 if (group_table[dword_index] != 0) {
  89                         for (bit_index = 0; bit_index < 32; bit_index++) {
  90                                 if ((group_table[dword_index] & (1 << bit_index)) != 0) {
  91                                         return (dword_index * 32) + bit_index;
  92                                 }
  93                         }
  94                 }
  95         }
  96
  97         return SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX;
  98 }
  99
 100 /**
 101  *
 102  * @out]: remote_node_table This the remote node table in which to clear the
 103  *    selector.
 104  * @set_index: This is the remote node selector in which the change will be
 105  *    made.
 106  * @group_index: This is the bit index in the table to be modified.
 107  *
 108  * This method will clear the group index entry in the specified group index
 109  * table. none
 110  */
 111 static void sci_remote_node_table_clear_group_index(
 112         struct sci_remote_node_table *remote_node_table,
 113         u32 group_table_index,
 114         u32 group_index)
 115 {
 116         u32 dword_index;
 117         u32 bit_index;
 118         u32 *group_table;
 119
 120         BUG_ON(group_table_index >= SCU_STP_REMOTE_NODE_COUNT);
 121         BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32));
 122
 123         dword_index = group_index / 32;
 124         bit_index   = group_index % 32;
 125         group_table = remote_node_table->remote_node_groups[group_table_index];
 126
 127         group_table[dword_index] = group_table[dword_index] & ~(1 << bit_index);
 128 }
 129
 130 /**
 131  *
 132  * @out]: remote_node_table This the remote node table in which to set the
 133  *    selector.
 134  * @group_table_index: This is the remote node selector in which the change
 135  *    will be made.
 136  * @group_index: This is the bit position in the table to be modified.
 137  *
 138  * This method will set the group index bit entry in the specified gropu index
 139  * table. none
 140  */
 141 static void sci_remote_node_table_set_group_index(
 142         struct sci_remote_node_table *remote_node_table,
 143         u32 group_table_index,
 144         u32 group_index)
 145 {
 146         u32 dword_index;
 147         u32 bit_index;
 148         u32 *group_table;
 149
 150         BUG_ON(group_table_index >= SCU_STP_REMOTE_NODE_COUNT);
 151         BUG_ON(group_index >= (u32)(remote_node_table->group_array_size * 32));
 152
 153         dword_index = group_index / 32;
 154         bit_index   = group_index % 32;
 155         group_table = remote_node_table->remote_node_groups[group_table_index];
 156
 157         group_table[dword_index] = group_table[dword_index] | (1 << bit_index);
 158 }
 159
 160 /**
 161  *
 162  * @out]: remote_node_table This is the remote node table in which to modify
 163  *    the remote node availability.
 164  * @remote_node_index: This is the remote node index that is being returned to
 165  *    the table.
 166  *
 167  * This method will set the remote to available in the remote node allocation
 168  * table. none
 169  */
 170 static void sci_remote_node_table_set_node_index(
 171         struct sci_remote_node_table *remote_node_table,
 172         u32 remote_node_index)
 173 {
 174         u32 dword_location;
 175         u32 dword_remainder;
 176         u32 slot_normalized;
 177         u32 slot_position;
 178
 179         BUG_ON(
 180                 (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD)
 181                 <= (remote_node_index / SCU_STP_REMOTE_NODE_COUNT)
 182                 );
 183
 184         dword_location  = remote_node_index / SCIC_SDS_REMOTE_NODES_PER_DWORD;
 185         dword_remainder = remote_node_index % SCIC_SDS_REMOTE_NODES_PER_DWORD;
 186         slot_normalized = (dword_remainder / SCU_STP_REMOTE_NODE_COUNT) * sizeof(u32);
 187         slot_position   = remote_node_index % SCU_STP_REMOTE_NODE_COUNT;
 188
 189         remote_node_table->available_remote_nodes[dword_location] |=
 190                 1 << (slot_normalized + slot_position);
 191 }
 192
 193 /**
 194  *
 195  * @out]: remote_node_table This is the remote node table from which to clear
 196  *    the available remote node bit.
 197  * @remote_node_index: This is the remote node index which is to be cleared
 198  *    from the table.
 199  *
 200  * This method clears the remote node index from the table of available remote
 201  * nodes. none
 202  */
 203 static void sci_remote_node_table_clear_node_index(
 204         struct sci_remote_node_table *remote_node_table,
 205         u32 remote_node_index)
 206 {
 207         u32 dword_location;
 208         u32 dword_remainder;
 209         u32 slot_position;
 210         u32 slot_normalized;
 211
 212         BUG_ON(
 213                 (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD)
 214                 <= (remote_node_index / SCU_STP_REMOTE_NODE_COUNT)
 215                 );
 216
 217         dword_location  = remote_node_index / SCIC_SDS_REMOTE_NODES_PER_DWORD;
 218         dword_remainder = remote_node_index % SCIC_SDS_REMOTE_NODES_PER_DWORD;
 219         slot_normalized = (dword_remainder / SCU_STP_REMOTE_NODE_COUNT) * sizeof(u32);
 220         slot_position   = remote_node_index % SCU_STP_REMOTE_NODE_COUNT;
 221
 222         remote_node_table->available_remote_nodes[dword_location] &=
 223                 ~(1 << (slot_normalized + slot_position));
 224 }
 225
 226 /**
 227  *
 228  * @out]: remote_node_table The remote node table from which the slot will be
 229  *    cleared.
 230  * @group_index: The index for the slot that is to be cleared.
 231  *
 232  * This method clears the entire table slot at the specified slot index. none
 233  */
 234 static void sci_remote_node_table_clear_group(
 235         struct sci_remote_node_table *remote_node_table,
 236         u32 group_index)
 237 {
 238         u32 dword_location;
 239         u32 dword_remainder;
 240         u32 dword_value;
 241
 242         BUG_ON(
 243                 (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD)
 244                 <= (group_index / SCU_STP_REMOTE_NODE_COUNT)
 245                 );
 246
 247         dword_location  = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 248         dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 249
 250         dword_value = remote_node_table->available_remote_nodes[dword_location];
 251         dword_value &= ~(SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4));
 252         remote_node_table->available_remote_nodes[dword_location] = dword_value;
 253 }
 254
 255 /**
 256  *
 257  * @remote_node_table:
 258  *
 259  * THis method sets an entire remote node group in the remote node table.
 260  */
 261 static void sci_remote_node_table_set_group(
 262         struct sci_remote_node_table *remote_node_table,
 263         u32 group_index)
 264 {
 265         u32 dword_location;
 266         u32 dword_remainder;
 267         u32 dword_value;
 268
 269         BUG_ON(
 270                 (remote_node_table->available_nodes_array_size * SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD)
 271                 <= (group_index / SCU_STP_REMOTE_NODE_COUNT)
 272                 );
 273
 274         dword_location  = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 275         dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 276
 277         dword_value = remote_node_table->available_remote_nodes[dword_location];
 278         dword_value |= (SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4));
 279         remote_node_table->available_remote_nodes[dword_location] = dword_value;
 280 }
 281
 282 /**
 283  *
 284  * @remote_node_table: This is the remote node table that for which the group
 285  *    value is to be returned.
 286  * @group_index: This is the group index to use to find the group value.
 287  *
 288  * This method will return the group value for the specified group index. The
 289  * bit values at the specified remote node group index.
 290  */
 291 static u8 sci_remote_node_table_get_group_value(
 292         struct sci_remote_node_table *remote_node_table,
 293         u32 group_index)
 294 {
 295         u32 dword_location;
 296         u32 dword_remainder;
 297         u32 dword_value;
 298
 299         dword_location  = group_index / SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 300         dword_remainder = group_index % SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD;
 301
 302         dword_value = remote_node_table->available_remote_nodes[dword_location];
 303         dword_value &= (SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE << (dword_remainder * 4));
 304         dword_value = dword_value >> (dword_remainder * 4);
 305
 306         return (u8)dword_value;
 307 }
 308
 309 /**
 310  *
 311  * @out]: remote_node_table The remote that which is to be initialized.
 312  * @remote_node_entries: The number of entries to put in the table.
 313  *
 314  * This method will initialize the remote node table for use. none
 315  */
 316 void sci_remote_node_table_initialize(
 317         struct sci_remote_node_table *remote_node_table,
 318         u32 remote_node_entries)
 319 {
 320         u32 index;
 321
 322         /*
 323          * Initialize the raw data we could improve the speed by only initializing
 324          * those entries that we are actually going to be used */
 325         memset(
 326                 remote_node_table->available_remote_nodes,
 327                 0x00,
 328                 sizeof(remote_node_table->available_remote_nodes)
 329                 );
 330
 331         memset(
 332                 remote_node_table->remote_node_groups,
 333                 0x00,
 334                 sizeof(remote_node_table->remote_node_groups)
 335                 );
 336
 337         /* Initialize the available remote node sets */
 338         remote_node_table->available_nodes_array_size = (u16)
 339                                                         (remote_node_entries / SCIC_SDS_REMOTE_NODES_PER_DWORD)
 340                                                         + ((remote_node_entries % SCIC_SDS_REMOTE_NODES_PER_DWORD) != 0);
 341
 342
 343         /* Initialize each full DWORD to a FULL SET of remote nodes */
 344         for (index = 0; index < remote_node_entries; index++) {
 345                 sci_remote_node_table_set_node_index(remote_node_table, index);
 346         }
 347
 348         remote_node_table->group_array_size = (u16)
 349                                               (remote_node_entries / (SCU_STP_REMOTE_NODE_COUNT * 32))
 350                                               + ((remote_node_entries % (SCU_STP_REMOTE_NODE_COUNT * 32)) != 0);
 351
 352         for (index = 0; index < (remote_node_entries / SCU_STP_REMOTE_NODE_COUNT); index++) {
 353                 /*
 354                  * These are all guaranteed to be full slot values so fill them in the
 355                  * available sets of 3 remote nodes */
 356                 sci_remote_node_table_set_group_index(remote_node_table, 2, index);
 357         }
 358
 359         /* Now fill in any remainders that we may find */
 360         if ((remote_node_entries % SCU_STP_REMOTE_NODE_COUNT) == 2) {
 361                 sci_remote_node_table_set_group_index(remote_node_table, 1, index);
 362         } else if ((remote_node_entries % SCU_STP_REMOTE_NODE_COUNT) == 1) {
 363                 sci_remote_node_table_set_group_index(remote_node_table, 0, index);
 364         }
 365 }
 366
 367 /**
 368  *
 369  * @out]: remote_node_table The remote node table from which to allocate a
 370  *    remote node.
 371  * @table_index: The group index that is to be used for the search.
 372  *
 373  * This method will allocate a single RNi from the remote node table.  The
 374  * table index will determine from which remote node group table to search.
 375  * This search may fail and another group node table can be specified.  The
 376  * function is designed to allow a serach of the available single remote node
 377  * group up to the triple remote node group.  If an entry is found in the
 378  * specified table the remote node is removed and the remote node groups are
 379  * updated. The RNi value or an invalid remote node context if an RNi can not
 380  * be found.
 381  */
 382 static u16 sci_remote_node_table_allocate_single_remote_node(
 383         struct sci_remote_node_table *remote_node_table,
 384         u32 group_table_index)
 385 {
 386         u8 index;
 387         u8 group_value;
 388         u32 group_index;
 389         u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
 390
 391         group_index = sci_remote_node_table_get_group_index(
 392                 remote_node_table, group_table_index);
 393
 394         /* We could not find an available slot in the table selector 0 */
 395         if (group_index != SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX) {
 396                 group_value = sci_remote_node_table_get_group_value(
 397                         remote_node_table, group_index);
 398
 399                 for (index = 0; index < SCU_STP_REMOTE_NODE_COUNT; index++) {
 400                         if (((1 << index) & group_value) != 0) {
 401                                 /* We have selected a bit now clear it */
 402                                 remote_node_index = (u16)(group_index * SCU_STP_REMOTE_NODE_COUNT
 403                                                           + index);
 404
 405                                 sci_remote_node_table_clear_group_index(
 406                                         remote_node_table, group_table_index, group_index
 407                                         );
 408
 409                                 sci_remote_node_table_clear_node_index(
 410                                         remote_node_table, remote_node_index
 411                                         );
 412
 413                                 if (group_table_index > 0) {
 414                                         sci_remote_node_table_set_group_index(
 415                                                 remote_node_table, group_table_index - 1, group_index
 416                                                 );
 417                                 }
 418
 419                                 break;
 420                         }
 421                 }
 422         }
 423
 424         return remote_node_index;
 425 }
 426
 427 /**
 428  *
 429  * @remote_node_table: This is the remote node table from which to allocate the
 430  *    remote node entries.
 431  * @group_table_index: THis is the group table index which must equal two (2)
 432  *    for this operation.
 433  *
 434  * This method will allocate three consecutive remote node context entries. If
 435  * there are no remaining triple entries the function will return a failure.
 436  * The remote node index that represents three consecutive remote node entries
 437  * or an invalid remote node context if none can be found.
 438  */
 439 static u16 sci_remote_node_table_allocate_triple_remote_node(
 440         struct sci_remote_node_table *remote_node_table,
 441         u32 group_table_index)
 442 {
 443         u32 group_index;
 444         u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
 445
 446         group_index = sci_remote_node_table_get_group_index(
 447                 remote_node_table, group_table_index);
 448
 449         if (group_index != SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX) {
 450                 remote_node_index = (u16)group_index * SCU_STP_REMOTE_NODE_COUNT;
 451
 452                 sci_remote_node_table_clear_group_index(
 453                         remote_node_table, group_table_index, group_index
 454                         );
 455
 456                 sci_remote_node_table_clear_group(
 457                         remote_node_table, group_index
 458                         );
 459         }
 460
 461         return remote_node_index;
 462 }
 463
 464 /**
 465  *
 466  * @remote_node_table: This is the remote node table from which the remote node
 467  *    allocation is to take place.
 468  * @remote_node_count: This is ther remote node count which is one of
 469  *    SCU_SSP_REMOTE_NODE_COUNT(1) or SCU_STP_REMOTE_NODE_COUNT(3).
 470  *
 471  * This method will allocate a remote node that mataches the remote node count
 472  * specified by the caller.  Valid values for remote node count is
 473  * SCU_SSP_REMOTE_NODE_COUNT(1) or SCU_STP_REMOTE_NODE_COUNT(3). u16 This is
 474  * the remote node index that is returned or an invalid remote node context.
 475  */
 476 u16 sci_remote_node_table_allocate_remote_node(
 477         struct sci_remote_node_table *remote_node_table,
 478         u32 remote_node_count)
 479 {
 480         u16 remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
 481
 482         if (remote_node_count == SCU_SSP_REMOTE_NODE_COUNT) {
 483                 remote_node_index =
 484                         sci_remote_node_table_allocate_single_remote_node(
 485                                 remote_node_table, 0);
 486
 487                 if (remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) {
 488                         remote_node_index =
 489                                 sci_remote_node_table_allocate_single_remote_node(
 490                                         remote_node_table, 1);
 491                 }
 492
 493                 if (remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX) {
 494                         remote_node_index =
 495                                 sci_remote_node_table_allocate_single_remote_node(
 496                                         remote_node_table, 2);
 497                 }
 498         } else if (remote_node_count == SCU_STP_REMOTE_NODE_COUNT) {
 499                 remote_node_index =
 500                         sci_remote_node_table_allocate_triple_remote_node(
 501                                 remote_node_table, 2);
 502         }
 503
 504         return remote_node_index;
 505 }
 506
 507 /**
 508  *
 509  * @remote_node_table:
 510  *
 511  * This method will free a single remote node index back to the remote node
 512  * table.  This routine will update the remote node groups
 513  */
 514 static void sci_remote_node_table_release_single_remote_node(
 515         struct sci_remote_node_table *remote_node_table,
 516         u16 remote_node_index)
 517 {
 518         u32 group_index;
 519         u8 group_value;
 520
 521         group_index = remote_node_index / SCU_STP_REMOTE_NODE_COUNT;
 522
 523         group_value = sci_remote_node_table_get_group_value(remote_node_table, group_index);
 524
 525         /*
 526          * Assert that we are not trying to add an entry to a slot that is already
 527          * full. */
 528         BUG_ON(group_value == SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE);
 529
 530         if (group_value == 0x00) {
 531                 /*
 532                  * There are no entries in this slot so it must be added to the single
 533                  * slot table. */
 534                 sci_remote_node_table_set_group_index(remote_node_table, 0, group_index);
 535         } else if ((group_value & (group_value - 1)) == 0) {
 536                 /*
 537                  * There is only one entry in this slot so it must be moved from the
 538                  * single slot table to the dual slot table */
 539                 sci_remote_node_table_clear_group_index(remote_node_table, 0, group_index);
 540                 sci_remote_node_table_set_group_index(remote_node_table, 1, group_index);
 541         } else {
 542                 /*
 543                  * There are two entries in the slot so it must be moved from the dual
 544                  * slot table to the tripple slot table. */
 545                 sci_remote_node_table_clear_group_index(remote_node_table, 1, group_index);
 546                 sci_remote_node_table_set_group_index(remote_node_table, 2, group_index);
 547         }
 548
 549         sci_remote_node_table_set_node_index(remote_node_table, remote_node_index);
 550 }
 551
 552 /**
 553  *
 554  * @remote_node_table: This is the remote node table to which the remote node
 555  *    index is to be freed.
 556  *
 557  * This method will release a group of three consecutive remote nodes back to
 558  * the free remote nodes.
 559  */
 560 static void sci_remote_node_table_release_triple_remote_node(
 561         struct sci_remote_node_table *remote_node_table,
 562         u16 remote_node_index)
 563 {
 564         u32 group_index;
 565
 566         group_index = remote_node_index / SCU_STP_REMOTE_NODE_COUNT;
 567
 568         sci_remote_node_table_set_group_index(
 569                 remote_node_table, 2, group_index
 570                 );
 571
 572         sci_remote_node_table_set_group(remote_node_table, group_index);
 573 }
 574
 575 /**
 576  *
 577  * @remote_node_table: The remote node table to which the remote node index is
 578  *    to be freed.
 579  * @remote_node_count: This is the count of consecutive remote nodes that are
 580  *    to be freed.
 581  *
 582  * This method will release the remote node index back into the remote node
 583  * table free pool.
 584  */
 585 void sci_remote_node_table_release_remote_node_index(
 586         struct sci_remote_node_table *remote_node_table,
 587         u32 remote_node_count,
 588         u16 remote_node_index)
 589 {
 590         if (remote_node_count == SCU_SSP_REMOTE_NODE_COUNT) {
 591                 sci_remote_node_table_release_single_remote_node(
 592                         remote_node_table, remote_node_index);
 593         } else if (remote_node_count == SCU_STP_REMOTE_NODE_COUNT) {
 594                 sci_remote_node_table_release_triple_remote_node(
 595                         remote_node_table, remote_node_index);
 596         }
 597 }
 598