drivers/infiniband/hw/ipath/ipath_sysfs.c

   1 /*
   2  * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
   3  * Copyright (c) 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/ctype.h>
  35
  36 #include "ipath_kernel.h"
  37 #include "ipath_common.h"
  38
  39 /**
  40  * ipath_parse_ushort - parse an unsigned short value in an arbitrary base
  41  * @str: the string containing the number
  42  * @valp: where to put the result
  43  *
  44  * returns the number of bytes consumed, or negative value on error
  45  */
  46 int ipath_parse_ushort(const char *str, unsigned short *valp)
  47 {
  48         unsigned long val;
  49         char *end;
  50         int ret;
  51
  52         if (!isdigit(str[0])) {
  53                 ret = -EINVAL;
  54                 goto bail;
  55         }
  56
  57         val = simple_strtoul(str, &end, 0);
  58
  59         if (val > 0xffff) {
  60                 ret = -EINVAL;
  61                 goto bail;
  62         }
  63
  64         *valp = val;
  65
  66         ret = end + 1 - str;
  67         if (ret == 0)
  68                 ret = -EINVAL;
  69
  70 bail:
  71         return ret;
  72 }
  73
  74 static ssize_t show_version(struct device_driver *dev, char *buf)
  75 {
  76         /* The string printed here is already newline-terminated. */
  77         return scnprintf(buf, PAGE_SIZE, "%s", ib_ipath_version);
  78 }
  79
  80 static ssize_t show_num_units(struct device_driver *dev, char *buf)
  81 {
  82         return scnprintf(buf, PAGE_SIZE, "%d\n",
  83                          ipath_count_units(NULL, NULL, NULL));
  84 }
  85
  86 static ssize_t show_status(struct device *dev,
  87                            struct device_attribute *attr,
  88                            char *buf)
  89 {
  90         struct ipath_devdata *dd = dev_get_drvdata(dev);
  91         ssize_t ret;
  92
  93         if (!dd->ipath_statusp) {
  94                 ret = -EINVAL;
  95                 goto bail;
  96         }
  97
  98         ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
  99                         (unsigned long long) *(dd->ipath_statusp));
 100
 101 bail:
 102         return ret;
 103 }
 104
 105 static const char *ipath_status_str[] = {
 106         "Initted",
 107         "Disabled",
 108         "Admin_Disabled",
 109         "", /* This used to be the old "OIB_SMA" status. */
 110         "", /* This used to be the old "SMA" status. */
 111         "Present",
 112         "IB_link_up",
 113         "IB_configured",
 114         "NoIBcable",
 115         "Fatal_Hardware_Error",
 116         NULL,
 117 };
 118
 119 static ssize_t show_status_str(struct device *dev,
 120                                struct device_attribute *attr,
 121                                char *buf)
 122 {
 123         struct ipath_devdata *dd = dev_get_drvdata(dev);
 124         int i, any;
 125         u64 s;
 126         ssize_t ret;
 127
 128         if (!dd->ipath_statusp) {
 129                 ret = -EINVAL;
 130                 goto bail;
 131         }
 132
 133         s = *(dd->ipath_statusp);
 134         *buf = '\0';
 135         for (any = i = 0; s && ipath_status_str[i]; i++) {
 136                 if (s & 1) {
 137                         if (any && strlcat(buf, " ", PAGE_SIZE) >=
 138                             PAGE_SIZE)
 139                                 /* overflow */
 140                                 break;
 141                         if (strlcat(buf, ipath_status_str[i],
 142                                     PAGE_SIZE) >= PAGE_SIZE)
 143                                 break;
 144                         any = 1;
 145                 }
 146                 s >>= 1;
 147         }
 148         if (any)
 149                 strlcat(buf, "\n", PAGE_SIZE);
 150
 151         ret = strlen(buf);
 152
 153 bail:
 154         return ret;
 155 }
 156
 157 static ssize_t show_boardversion(struct device *dev,
 158                                struct device_attribute *attr,
 159                                char *buf)
 160 {
 161         struct ipath_devdata *dd = dev_get_drvdata(dev);
 162         /* The string printed here is already newline-terminated. */
 163         return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
 164 }
 165
 166 static ssize_t show_localbus_info(struct device *dev,
 167                                struct device_attribute *attr,
 168                                char *buf)
 169 {
 170         struct ipath_devdata *dd = dev_get_drvdata(dev);
 171         /* The string printed here is already newline-terminated. */
 172         return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_lbus_info);
 173 }
 174
 175 static ssize_t show_lmc(struct device *dev,
 176                         struct device_attribute *attr,
 177                         char *buf)
 178 {
 179         struct ipath_devdata *dd = dev_get_drvdata(dev);
 180
 181         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_lmc);
 182 }
 183
 184 static ssize_t store_lmc(struct device *dev,
 185                          struct device_attribute *attr,
 186                          const char *buf,
 187                          size_t count)
 188 {
 189         struct ipath_devdata *dd = dev_get_drvdata(dev);
 190         u16 lmc = 0;
 191         int ret;
 192
 193         ret = ipath_parse_ushort(buf, &lmc);
 194         if (ret < 0)
 195                 goto invalid;
 196
 197         if (lmc > 7) {
 198                 ret = -EINVAL;
 199                 goto invalid;
 200         }
 201
 202         ipath_set_lid(dd, dd->ipath_lid, lmc);
 203
 204         goto bail;
 205 invalid:
 206         ipath_dev_err(dd, "attempt to set invalid LMC %u\n", lmc);
 207 bail:
 208         return ret;
 209 }
 210
 211 static ssize_t show_lid(struct device *dev,
 212                         struct device_attribute *attr,
 213                         char *buf)
 214 {
 215         struct ipath_devdata *dd = dev_get_drvdata(dev);
 216
 217         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_lid);
 218 }
 219
 220 static ssize_t store_lid(struct device *dev,
 221                          struct device_attribute *attr,
 222                           const char *buf,
 223                           size_t count)
 224 {
 225         struct ipath_devdata *dd = dev_get_drvdata(dev);
 226         u16 lid = 0;
 227         int ret;
 228
 229         ret = ipath_parse_ushort(buf, &lid);
 230         if (ret < 0)
 231                 goto invalid;
 232
 233         if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE) {
 234                 ret = -EINVAL;
 235                 goto invalid;
 236         }
 237
 238         ipath_set_lid(dd, lid, dd->ipath_lmc);
 239
 240         goto bail;
 241 invalid:
 242         ipath_dev_err(dd, "attempt to set invalid LID 0x%x\n", lid);
 243 bail:
 244         return ret;
 245 }
 246
 247 static ssize_t show_mlid(struct device *dev,
 248                          struct device_attribute *attr,
 249                          char *buf)
 250 {
 251         struct ipath_devdata *dd = dev_get_drvdata(dev);
 252
 253         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_mlid);
 254 }
 255
 256 static ssize_t store_mlid(struct device *dev,
 257                          struct device_attribute *attr,
 258                           const char *buf,
 259                           size_t count)
 260 {
 261         struct ipath_devdata *dd = dev_get_drvdata(dev);
 262         u16 mlid;
 263         int ret;
 264
 265         ret = ipath_parse_ushort(buf, &mlid);
 266         if (ret < 0 || mlid < IPATH_MULTICAST_LID_BASE)
 267                 goto invalid;
 268
 269         dd->ipath_mlid = mlid;
 270
 271         goto bail;
 272 invalid:
 273         ipath_dev_err(dd, "attempt to set invalid MLID\n");
 274 bail:
 275         return ret;
 276 }
 277
 278 static ssize_t show_guid(struct device *dev,
 279                          struct device_attribute *attr,
 280                          char *buf)
 281 {
 282         struct ipath_devdata *dd = dev_get_drvdata(dev);
 283         u8 *guid;
 284
 285         guid = (u8 *) & (dd->ipath_guid);
 286
 287         return scnprintf(buf, PAGE_SIZE,
 288                          "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
 289                          guid[0], guid[1], guid[2], guid[3],
 290                          guid[4], guid[5], guid[6], guid[7]);
 291 }
 292
 293 static ssize_t store_guid(struct device *dev,
 294                          struct device_attribute *attr,
 295                           const char *buf,
 296                           size_t count)
 297 {
 298         struct ipath_devdata *dd = dev_get_drvdata(dev);
 299         ssize_t ret;
 300         unsigned short guid[8];
 301         __be64 new_guid;
 302         u8 *ng;
 303         int i;
 304
 305         if (sscanf(buf, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
 306                    &guid[0], &guid[1], &guid[2], &guid[3],
 307                    &guid[4], &guid[5], &guid[6], &guid[7]) != 8)
 308                 goto invalid;
 309
 310         ng = (u8 *) &new_guid;
 311
 312         for (i = 0; i < 8; i++) {
 313                 if (guid[i] > 0xff)
 314                         goto invalid;
 315                 ng[i] = guid[i];
 316         }
 317
 318         if (new_guid == 0)
 319                 goto invalid;
 320
 321         dd->ipath_guid = new_guid;
 322         dd->ipath_nguid = 1;
 323
 324         ret = strlen(buf);
 325         goto bail;
 326
 327 invalid:
 328         ipath_dev_err(dd, "attempt to set invalid GUID\n");
 329         ret = -EINVAL;
 330
 331 bail:
 332         return ret;
 333 }
 334
 335 static ssize_t show_nguid(struct device *dev,
 336                           struct device_attribute *attr,
 337                           char *buf)
 338 {
 339         struct ipath_devdata *dd = dev_get_drvdata(dev);
 340
 341         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_nguid);
 342 }
 343
 344 static ssize_t show_nports(struct device *dev,
 345                            struct device_attribute *attr,
 346                            char *buf)
 347 {
 348         struct ipath_devdata *dd = dev_get_drvdata(dev);
 349
 350         /* Return the number of user ports available. */
 351         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_cfgports - 1);
 352 }
 353
 354 static ssize_t show_serial(struct device *dev,
 355                            struct device_attribute *attr,
 356                            char *buf)
 357 {
 358         struct ipath_devdata *dd = dev_get_drvdata(dev);
 359
 360         buf[sizeof dd->ipath_serial] = '\0';
 361         memcpy(buf, dd->ipath_serial, sizeof dd->ipath_serial);
 362         strcat(buf, "\n");
 363         return strlen(buf);
 364 }
 365
 366 static ssize_t show_unit(struct device *dev,
 367                          struct device_attribute *attr,
 368                          char *buf)
 369 {
 370         struct ipath_devdata *dd = dev_get_drvdata(dev);
 371
 372         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_unit);
 373 }
 374
 375 static ssize_t show_jint_max_packets(struct device *dev,
 376                                      struct device_attribute *attr,
 377                                      char *buf)
 378 {
 379         struct ipath_devdata *dd = dev_get_drvdata(dev);
 380
 381         return scnprintf(buf, PAGE_SIZE, "%hu\n", dd->ipath_jint_max_packets);
 382 }
 383
 384 static ssize_t store_jint_max_packets(struct device *dev,
 385                                       struct device_attribute *attr,
 386                                       const char *buf,
 387                                       size_t count)
 388 {
 389         struct ipath_devdata *dd = dev_get_drvdata(dev);
 390         u16 v = 0;
 391         int ret;
 392
 393         ret = ipath_parse_ushort(buf, &v);
 394         if (ret < 0)
 395                 ipath_dev_err(dd, "invalid jint_max_packets.\n");
 396         else
 397                 dd->ipath_f_config_jint(dd, dd->ipath_jint_idle_ticks, v);
 398
 399         return ret;
 400 }
 401
 402 static ssize_t show_jint_idle_ticks(struct device *dev,
 403                                     struct device_attribute *attr,
 404                                     char *buf)
 405 {
 406         struct ipath_devdata *dd = dev_get_drvdata(dev);
 407
 408         return scnprintf(buf, PAGE_SIZE, "%hu\n", dd->ipath_jint_idle_ticks);
 409 }
 410
 411 static ssize_t store_jint_idle_ticks(struct device *dev,
 412                                      struct device_attribute *attr,
 413                                      const char *buf,
 414                                      size_t count)
 415 {
 416         struct ipath_devdata *dd = dev_get_drvdata(dev);
 417         u16 v = 0;
 418         int ret;
 419
 420         ret = ipath_parse_ushort(buf, &v);
 421         if (ret < 0)
 422                 ipath_dev_err(dd, "invalid jint_idle_ticks.\n");
 423         else
 424                 dd->ipath_f_config_jint(dd, v, dd->ipath_jint_max_packets);
 425
 426         return ret;
 427 }
 428
 429 #define DEVICE_COUNTER(name, attr) \
 430         static ssize_t show_counter_##name(struct device *dev, \
 431                                            struct device_attribute *attr, \
 432                                            char *buf) \
 433         { \
 434                 struct ipath_devdata *dd = dev_get_drvdata(dev); \
 435                 return scnprintf(\
 436                         buf, PAGE_SIZE, "%llu\n", (unsigned long long) \
 437                         ipath_snap_cntr( \
 438                                 dd, offsetof(struct infinipath_counters, \
 439                                              attr) / sizeof(u64)));     \
 440         } \
 441         static DEVICE_ATTR(name, S_IRUGO, show_counter_##name, NULL);
 442
 443 DEVICE_COUNTER(ib_link_downeds, IBLinkDownedCnt);
 444 DEVICE_COUNTER(ib_link_err_recoveries, IBLinkErrRecoveryCnt);
 445 DEVICE_COUNTER(ib_status_changes, IBStatusChangeCnt);
 446 DEVICE_COUNTER(ib_symbol_errs, IBSymbolErrCnt);
 447 DEVICE_COUNTER(lb_flow_stalls, LBFlowStallCnt);
 448 DEVICE_COUNTER(lb_ints, LBIntCnt);
 449 DEVICE_COUNTER(rx_bad_formats, RxBadFormatCnt);
 450 DEVICE_COUNTER(rx_buf_ovfls, RxBufOvflCnt);
 451 DEVICE_COUNTER(rx_data_pkts, RxDataPktCnt);
 452 DEVICE_COUNTER(rx_dropped_pkts, RxDroppedPktCnt);
 453 DEVICE_COUNTER(rx_dwords, RxDwordCnt);
 454 DEVICE_COUNTER(rx_ebps, RxEBPCnt);
 455 DEVICE_COUNTER(rx_flow_ctrl_errs, RxFlowCtrlErrCnt);
 456 DEVICE_COUNTER(rx_flow_pkts, RxFlowPktCnt);
 457 DEVICE_COUNTER(rx_icrc_errs, RxICRCErrCnt);
 458 DEVICE_COUNTER(rx_len_errs, RxLenErrCnt);
 459 DEVICE_COUNTER(rx_link_problems, RxLinkProblemCnt);
 460 DEVICE_COUNTER(rx_lpcrc_errs, RxLPCRCErrCnt);
 461 DEVICE_COUNTER(rx_max_min_len_errs, RxMaxMinLenErrCnt);
 462 DEVICE_COUNTER(rx_p0_hdr_egr_ovfls, RxP0HdrEgrOvflCnt);
 463 DEVICE_COUNTER(rx_p1_hdr_egr_ovfls, RxP1HdrEgrOvflCnt);
 464 DEVICE_COUNTER(rx_p2_hdr_egr_ovfls, RxP2HdrEgrOvflCnt);
 465 DEVICE_COUNTER(rx_p3_hdr_egr_ovfls, RxP3HdrEgrOvflCnt);
 466 DEVICE_COUNTER(rx_p4_hdr_egr_ovfls, RxP4HdrEgrOvflCnt);
 467 DEVICE_COUNTER(rx_p5_hdr_egr_ovfls, RxP5HdrEgrOvflCnt);
 468 DEVICE_COUNTER(rx_p6_hdr_egr_ovfls, RxP6HdrEgrOvflCnt);
 469 DEVICE_COUNTER(rx_p7_hdr_egr_ovfls, RxP7HdrEgrOvflCnt);
 470 DEVICE_COUNTER(rx_p8_hdr_egr_ovfls, RxP8HdrEgrOvflCnt);
 471 DEVICE_COUNTER(rx_pkey_mismatches, RxPKeyMismatchCnt);
 472 DEVICE_COUNTER(rx_tid_full_errs, RxTIDFullErrCnt);
 473 DEVICE_COUNTER(rx_tid_valid_errs, RxTIDValidErrCnt);
 474 DEVICE_COUNTER(rx_vcrc_errs, RxVCRCErrCnt);
 475 DEVICE_COUNTER(tx_data_pkts, TxDataPktCnt);
 476 DEVICE_COUNTER(tx_dropped_pkts, TxDroppedPktCnt);
 477 DEVICE_COUNTER(tx_dwords, TxDwordCnt);
 478 DEVICE_COUNTER(tx_flow_pkts, TxFlowPktCnt);
 479 DEVICE_COUNTER(tx_flow_stalls, TxFlowStallCnt);
 480 DEVICE_COUNTER(tx_len_errs, TxLenErrCnt);
 481 DEVICE_COUNTER(tx_max_min_len_errs, TxMaxMinLenErrCnt);
 482 DEVICE_COUNTER(tx_underruns, TxUnderrunCnt);
 483 DEVICE_COUNTER(tx_unsup_vl_errs, TxUnsupVLErrCnt);
 484
 485 static struct attribute *dev_counter_attributes[] = {
 486         &dev_attr_ib_link_downeds.attr,
 487         &dev_attr_ib_link_err_recoveries.attr,
 488         &dev_attr_ib_status_changes.attr,
 489         &dev_attr_ib_symbol_errs.attr,
 490         &dev_attr_lb_flow_stalls.attr,
 491         &dev_attr_lb_ints.attr,
 492         &dev_attr_rx_bad_formats.attr,
 493         &dev_attr_rx_buf_ovfls.attr,
 494         &dev_attr_rx_data_pkts.attr,
 495         &dev_attr_rx_dropped_pkts.attr,
 496         &dev_attr_rx_dwords.attr,
 497         &dev_attr_rx_ebps.attr,
 498         &dev_attr_rx_flow_ctrl_errs.attr,
 499         &dev_attr_rx_flow_pkts.attr,
 500         &dev_attr_rx_icrc_errs.attr,
 501         &dev_attr_rx_len_errs.attr,
 502         &dev_attr_rx_link_problems.attr,
 503         &dev_attr_rx_lpcrc_errs.attr,
 504         &dev_attr_rx_max_min_len_errs.attr,
 505         &dev_attr_rx_p0_hdr_egr_ovfls.attr,
 506         &dev_attr_rx_p1_hdr_egr_ovfls.attr,
 507         &dev_attr_rx_p2_hdr_egr_ovfls.attr,
 508         &dev_attr_rx_p3_hdr_egr_ovfls.attr,
 509         &dev_attr_rx_p4_hdr_egr_ovfls.attr,
 510         &dev_attr_rx_p5_hdr_egr_ovfls.attr,
 511         &dev_attr_rx_p6_hdr_egr_ovfls.attr,
 512         &dev_attr_rx_p7_hdr_egr_ovfls.attr,
 513         &dev_attr_rx_p8_hdr_egr_ovfls.attr,
 514         &dev_attr_rx_pkey_mismatches.attr,
 515         &dev_attr_rx_tid_full_errs.attr,
 516         &dev_attr_rx_tid_valid_errs.attr,
 517         &dev_attr_rx_vcrc_errs.attr,
 518         &dev_attr_tx_data_pkts.attr,
 519         &dev_attr_tx_dropped_pkts.attr,
 520         &dev_attr_tx_dwords.attr,
 521         &dev_attr_tx_flow_pkts.attr,
 522         &dev_attr_tx_flow_stalls.attr,
 523         &dev_attr_tx_len_errs.attr,
 524         &dev_attr_tx_max_min_len_errs.attr,
 525         &dev_attr_tx_underruns.attr,
 526         &dev_attr_tx_unsup_vl_errs.attr,
 527         NULL
 528 };
 529
 530 static struct attribute_group dev_counter_attr_group = {
 531         .name = "counters",
 532         .attrs = dev_counter_attributes
 533 };
 534
 535 static ssize_t store_reset(struct device *dev,
 536                          struct device_attribute *attr,
 537                           const char *buf,
 538                           size_t count)
 539 {
 540         struct ipath_devdata *dd = dev_get_drvdata(dev);
 541         int ret;
 542
 543         if (count < 5 || memcmp(buf, "reset", 5)) {
 544                 ret = -EINVAL;
 545                 goto bail;
 546         }
 547
 548         if (dd->ipath_flags & IPATH_DISABLED) {
 549                 /*
 550                  * post-reset init would re-enable interrupts, etc.
 551                  * so don't allow reset on disabled devices.  Not
 552                  * perfect error, but about the best choice.
 553                  */
 554                 dev_info(dev,"Unit %d is disabled, can't reset\n",
 555                          dd->ipath_unit);
 556                 ret = -EINVAL;
 557         }
 558         ret = ipath_reset_device(dd->ipath_unit);
 559 bail:
 560         return ret<0 ? ret : count;
 561 }
 562
 563 static ssize_t store_link_state(struct device *dev,
 564                          struct device_attribute *attr,
 565                           const char *buf,
 566                           size_t count)
 567 {
 568         struct ipath_devdata *dd = dev_get_drvdata(dev);
 569         int ret, r;
 570         u16 state;
 571
 572         ret = ipath_parse_ushort(buf, &state);
 573         if (ret < 0)
 574                 goto invalid;
 575
 576         r = ipath_set_linkstate(dd, state);
 577         if (r < 0) {
 578                 ret = r;
 579                 goto bail;
 580         }
 581
 582         goto bail;
 583 invalid:
 584         ipath_dev_err(dd, "attempt to set invalid link state\n");
 585 bail:
 586         return ret;
 587 }
 588
 589 static ssize_t show_mtu(struct device *dev,
 590                          struct device_attribute *attr,
 591                          char *buf)
 592 {
 593         struct ipath_devdata *dd = dev_get_drvdata(dev);
 594         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_ibmtu);
 595 }
 596
 597 static ssize_t store_mtu(struct device *dev,
 598                          struct device_attribute *attr,
 599                           const char *buf,
 600                           size_t count)
 601 {
 602         struct ipath_devdata *dd = dev_get_drvdata(dev);
 603         ssize_t ret;
 604         u16 mtu = 0;
 605         int r;
 606
 607         ret = ipath_parse_ushort(buf, &mtu);
 608         if (ret < 0)
 609                 goto invalid;
 610
 611         r = ipath_set_mtu(dd, mtu);
 612         if (r < 0)
 613                 ret = r;
 614
 615         goto bail;
 616 invalid:
 617         ipath_dev_err(dd, "attempt to set invalid MTU\n");
 618 bail:
 619         return ret;
 620 }
 621
 622 static ssize_t show_enabled(struct device *dev,
 623                          struct device_attribute *attr,
 624                          char *buf)
 625 {
 626         struct ipath_devdata *dd = dev_get_drvdata(dev);
 627         return scnprintf(buf, PAGE_SIZE, "%u\n",
 628                          (dd->ipath_flags & IPATH_DISABLED) ? 0 : 1);
 629 }
 630
 631 static ssize_t store_enabled(struct device *dev,
 632                          struct device_attribute *attr,
 633                           const char *buf,
 634                           size_t count)
 635 {
 636         struct ipath_devdata *dd = dev_get_drvdata(dev);
 637         ssize_t ret;
 638         u16 enable = 0;
 639
 640         ret = ipath_parse_ushort(buf, &enable);
 641         if (ret < 0) {
 642                 ipath_dev_err(dd, "attempt to use non-numeric on enable\n");
 643                 goto bail;
 644         }
 645
 646         if (enable) {
 647                 if (!(dd->ipath_flags & IPATH_DISABLED))
 648                         goto bail;
 649
 650                 dev_info(dev, "Enabling unit %d\n", dd->ipath_unit);
 651                 /* same as post-reset */
 652                 ret = ipath_init_chip(dd, 1);
 653                 if (ret)
 654                         ipath_dev_err(dd, "Failed to enable unit %d\n",
 655                                       dd->ipath_unit);
 656                 else {
 657                         dd->ipath_flags &= ~IPATH_DISABLED;
 658                         *dd->ipath_statusp &= ~IPATH_STATUS_ADMIN_DISABLED;
 659                 }
 660         }
 661         else if (!(dd->ipath_flags & IPATH_DISABLED)) {
 662                 dev_info(dev, "Disabling unit %d\n", dd->ipath_unit);
 663                 ipath_shutdown_device(dd);
 664                 dd->ipath_flags |= IPATH_DISABLED;
 665                 *dd->ipath_statusp |= IPATH_STATUS_ADMIN_DISABLED;
 666         }
 667
 668 bail:
 669         return ret;
 670 }
 671
 672 static ssize_t store_rx_pol_inv(struct device *dev,
 673                           struct device_attribute *attr,
 674                           const char *buf,
 675                           size_t count)
 676 {
 677         struct ipath_devdata *dd = dev_get_drvdata(dev);
 678         int ret, r;
 679         u16 val;
 680
 681         ret = ipath_parse_ushort(buf, &val);
 682         if (ret < 0)
 683                 goto invalid;
 684
 685         r = ipath_set_rx_pol_inv(dd, val);
 686         if (r < 0) {
 687                 ret = r;
 688                 goto bail;
 689         }
 690
 691         goto bail;
 692 invalid:
 693         ipath_dev_err(dd, "attempt to set invalid Rx Polarity invert\n");
 694 bail:
 695         return ret;
 696 }
 697
 698 static ssize_t store_led_override(struct device *dev,
 699                           struct device_attribute *attr,
 700                           const char *buf,
 701                           size_t count)
 702 {
 703         struct ipath_devdata *dd = dev_get_drvdata(dev);
 704         int ret;
 705         u16 val;
 706
 707         ret = ipath_parse_ushort(buf, &val);
 708         if (ret > 0)
 709                 ipath_set_led_override(dd, val);
 710         else
 711                 ipath_dev_err(dd, "attempt to set invalid LED override\n");
 712         return ret;
 713 }
 714
 715 static ssize_t show_logged_errs(struct device *dev,
 716                                 struct device_attribute *attr,
 717                                 char *buf)
 718 {
 719         struct ipath_devdata *dd = dev_get_drvdata(dev);
 720         int idx, count;
 721
 722         /* force consistency with actual EEPROM */
 723         if (ipath_update_eeprom_log(dd) != 0)
 724                 return -ENXIO;
 725
 726         count = 0;
 727         for (idx = 0; idx < IPATH_EEP_LOG_CNT; ++idx) {
 728                 count += scnprintf(buf + count, PAGE_SIZE - count, "%d%c",
 729                         dd->ipath_eep_st_errs[idx],
 730                         idx == (IPATH_EEP_LOG_CNT - 1) ? '\n' : ' ');
 731         }
 732
 733         return count;
 734 }
 735
 736 /*
 737  * New sysfs entries to control various IB config. These all turn into
 738  * accesses via ipath_f_get/set_ib_cfg.
 739  *
 740  * Get/Set heartbeat enable. Or of 1=enabled, 2=auto
 741  */
 742 static ssize_t show_hrtbt_enb(struct device *dev,
 743                          struct device_attribute *attr,
 744                          char *buf)
 745 {
 746         struct ipath_devdata *dd = dev_get_drvdata(dev);
 747         int ret;
 748
 749         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_HRTBT);
 750         if (ret >= 0)
 751                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 752         return ret;
 753 }
 754
 755 static ssize_t store_hrtbt_enb(struct device *dev,
 756                           struct device_attribute *attr,
 757                           const char *buf,
 758                           size_t count)
 759 {
 760         struct ipath_devdata *dd = dev_get_drvdata(dev);
 761         int ret, r;
 762         u16 val;
 763
 764         ret = ipath_parse_ushort(buf, &val);
 765         if (ret >= 0 && val > 3)
 766                 ret = -EINVAL;
 767         if (ret < 0) {
 768                 ipath_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
 769                 goto bail;
 770         }
 771
 772         /*
 773          * Set the "intentional" heartbeat enable per either of
 774          * "Enable" and "Auto", as these are normally set together.
 775          * This bit is consulted when leaving loopback mode,
 776          * because entering loopback mode overrides it and automatically
 777          * disables heartbeat.
 778          */
 779         r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, val);
 780         if (r < 0)
 781                 ret = r;
 782         else if (val == IPATH_IB_HRTBT_OFF)
 783                 dd->ipath_flags |= IPATH_NO_HRTBT;
 784         else
 785                 dd->ipath_flags &= ~IPATH_NO_HRTBT;
 786
 787 bail:
 788         return ret;
 789 }
 790
 791 /*
 792  * Get/Set Link-widths enabled. Or of 1=1x, 2=4x (this is human/IB centric,
 793  * _not_ the particular encoding of any given chip)
 794  */
 795 static ssize_t show_lwid_enb(struct device *dev,
 796                          struct device_attribute *attr,
 797                          char *buf)
 798 {
 799         struct ipath_devdata *dd = dev_get_drvdata(dev);
 800         int ret;
 801
 802         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB);
 803         if (ret >= 0)
 804                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 805         return ret;
 806 }
 807
 808 static ssize_t store_lwid_enb(struct device *dev,
 809                           struct device_attribute *attr,
 810                           const char *buf,
 811                           size_t count)
 812 {
 813         struct ipath_devdata *dd = dev_get_drvdata(dev);
 814         int ret, r;
 815         u16 val;
 816
 817         ret = ipath_parse_ushort(buf, &val);
 818         if (ret >= 0 && (val == 0 || val > 3))
 819                 ret = -EINVAL;
 820         if (ret < 0) {
 821                 ipath_dev_err(dd,
 822                         "attempt to set invalid Link Width (enable)\n");
 823                 goto bail;
 824         }
 825
 826         r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB, val);
 827         if (r < 0)
 828                 ret = r;
 829
 830 bail:
 831         return ret;
 832 }
 833
 834 /* Get current link width */
 835 static ssize_t show_lwid(struct device *dev,
 836                          struct device_attribute *attr,
 837                          char *buf)
 838
 839 {
 840         struct ipath_devdata *dd = dev_get_drvdata(dev);
 841         int ret;
 842
 843         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LWID);
 844         if (ret >= 0)
 845                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 846         return ret;
 847 }
 848
 849 /*
 850  * Get/Set Link-speeds enabled. Or of 1=SDR 2=DDR.
 851  */
 852 static ssize_t show_spd_enb(struct device *dev,
 853                          struct device_attribute *attr,
 854                          char *buf)
 855 {
 856         struct ipath_devdata *dd = dev_get_drvdata(dev);
 857         int ret;
 858
 859         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB);
 860         if (ret >= 0)
 861                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 862         return ret;
 863 }
 864
 865 static ssize_t store_spd_enb(struct device *dev,
 866                           struct device_attribute *attr,
 867                           const char *buf,
 868                           size_t count)
 869 {
 870         struct ipath_devdata *dd = dev_get_drvdata(dev);
 871         int ret, r;
 872         u16 val;
 873
 874         ret = ipath_parse_ushort(buf, &val);
 875         if (ret >= 0 && (val == 0 || val > (IPATH_IB_SDR | IPATH_IB_DDR)))
 876                 ret = -EINVAL;
 877         if (ret < 0) {
 878                 ipath_dev_err(dd,
 879                         "attempt to set invalid Link Speed (enable)\n");
 880                 goto bail;
 881         }
 882
 883         r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB, val);
 884         if (r < 0)
 885                 ret = r;
 886
 887 bail:
 888         return ret;
 889 }
 890
 891 /* Get current link speed */
 892 static ssize_t show_spd(struct device *dev,
 893                          struct device_attribute *attr,
 894                          char *buf)
 895 {
 896         struct ipath_devdata *dd = dev_get_drvdata(dev);
 897         int ret;
 898
 899         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_SPD);
 900         if (ret >= 0)
 901                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 902         return ret;
 903 }
 904
 905 /*
 906  * Get/Set RX polarity-invert enable. 0=no, 1=yes.
 907  */
 908 static ssize_t show_rx_polinv_enb(struct device *dev,
 909                          struct device_attribute *attr,
 910                          char *buf)
 911 {
 912         struct ipath_devdata *dd = dev_get_drvdata(dev);
 913         int ret;
 914
 915         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_RXPOL_ENB);
 916         if (ret >= 0)
 917                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 918         return ret;
 919 }
 920
 921 static ssize_t store_rx_polinv_enb(struct device *dev,
 922                           struct device_attribute *attr,
 923                           const char *buf,
 924                           size_t count)
 925 {
 926         struct ipath_devdata *dd = dev_get_drvdata(dev);
 927         int ret, r;
 928         u16 val;
 929
 930         ret = ipath_parse_ushort(buf, &val);
 931         if (ret < 0 || val > 1)
 932                 goto invalid;
 933
 934         r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_RXPOL_ENB, val);
 935         if (r < 0) {
 936                 ret = r;
 937                 goto bail;
 938         }
 939
 940         goto bail;
 941 invalid:
 942         ipath_dev_err(dd, "attempt to set invalid Rx Polarity (enable)\n");
 943 bail:
 944         return ret;
 945 }
 946 /*
 947  * Get/Set RX lane-reversal enable. 0=no, 1=yes.
 948  */
 949 static ssize_t show_lanerev_enb(struct device *dev,
 950                          struct device_attribute *attr,
 951                          char *buf)
 952 {
 953         struct ipath_devdata *dd = dev_get_drvdata(dev);
 954         int ret;
 955
 956         ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LREV_ENB);
 957         if (ret >= 0)
 958                 ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
 959         return ret;
 960 }
 961
 962 static ssize_t store_lanerev_enb(struct device *dev,
 963                           struct device_attribute *attr,
 964                           const char *buf,
 965                           size_t count)
 966 {
 967         struct ipath_devdata *dd = dev_get_drvdata(dev);
 968         int ret, r;
 969         u16 val;
 970
 971         ret = ipath_parse_ushort(buf, &val);
 972         if (ret >= 0 && val > 1) {
 973                 ret = -EINVAL;
 974                 ipath_dev_err(dd,
 975                         "attempt to set invalid Lane reversal (enable)\n");
 976                 goto bail;
 977         }
 978
 979         r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LREV_ENB, val);
 980         if (r < 0)
 981                 ret = r;
 982
 983 bail:
 984         return ret;
 985 }
 986
 987 static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
 988 static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);
 989
 990 static struct attribute *driver_attributes[] = {
 991         &driver_attr_num_units.attr,
 992         &driver_attr_version.attr,
 993         NULL
 994 };
 995
 996 static struct attribute_group driver_attr_group = {
 997         .attrs = driver_attributes
 998 };
 999
1000 struct attribute_group *ipath_driver_attr_groups[] = {
1001         &driver_attr_group,
1002         NULL,
1003 };
1004
1005 static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
1006 static DEVICE_ATTR(lmc, S_IWUSR | S_IRUGO, show_lmc, store_lmc);
1007 static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
1008 static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
1009 static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
1010 static DEVICE_ATTR(mtu, S_IWUSR | S_IRUGO, show_mtu, store_mtu);
1011 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO, show_enabled, store_enabled);
1012 static DEVICE_ATTR(nguid, S_IRUGO, show_nguid, NULL);
1013 static DEVICE_ATTR(nports, S_IRUGO, show_nports, NULL);
1014 static DEVICE_ATTR(reset, S_IWUSR, NULL, store_reset);
1015 static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
1016 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
1017 static DEVICE_ATTR(status_str, S_IRUGO, show_status_str, NULL);
1018 static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
1019 static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
1020 static DEVICE_ATTR(rx_pol_inv, S_IWUSR, NULL, store_rx_pol_inv);
1021 static DEVICE_ATTR(led_override, S_IWUSR, NULL, store_led_override);
1022 static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
1023 static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
1024 static DEVICE_ATTR(jint_max_packets, S_IWUSR | S_IRUGO,
1025                    show_jint_max_packets, store_jint_max_packets);
1026 static DEVICE_ATTR(jint_idle_ticks, S_IWUSR | S_IRUGO,
1027                    show_jint_idle_ticks, store_jint_idle_ticks);
1028
1029 static struct attribute *dev_attributes[] = {
1030         &dev_attr_guid.attr,
1031         &dev_attr_lmc.attr,
1032         &dev_attr_lid.attr,
1033         &dev_attr_link_state.attr,
1034         &dev_attr_mlid.attr,
1035         &dev_attr_mtu.attr,
1036         &dev_attr_nguid.attr,
1037         &dev_attr_nports.attr,
1038         &dev_attr_serial.attr,
1039         &dev_attr_status.attr,
1040         &dev_attr_status_str.attr,
1041         &dev_attr_boardversion.attr,
1042         &dev_attr_unit.attr,
1043         &dev_attr_enabled.attr,
1044         &dev_attr_rx_pol_inv.attr,
1045         &dev_attr_led_override.attr,
1046         &dev_attr_logged_errors.attr,
1047         &dev_attr_localbus_info.attr,
1048         NULL
1049 };
1050
1051 static struct attribute_group dev_attr_group = {
1052         .attrs = dev_attributes
1053 };
1054
1055 static DEVICE_ATTR(hrtbt_enable, S_IWUSR | S_IRUGO, show_hrtbt_enb,
1056                    store_hrtbt_enb);
1057 static DEVICE_ATTR(link_width_enable, S_IWUSR | S_IRUGO, show_lwid_enb,
1058                    store_lwid_enb);
1059 static DEVICE_ATTR(link_width, S_IRUGO, show_lwid, NULL);
1060 static DEVICE_ATTR(link_speed_enable, S_IWUSR | S_IRUGO, show_spd_enb,
1061                    store_spd_enb);
1062 static DEVICE_ATTR(link_speed, S_IRUGO, show_spd, NULL);
1063 static DEVICE_ATTR(rx_pol_inv_enable, S_IWUSR | S_IRUGO, show_rx_polinv_enb,
1064                    store_rx_polinv_enb);
1065 static DEVICE_ATTR(rx_lane_rev_enable, S_IWUSR | S_IRUGO, show_lanerev_enb,
1066                    store_lanerev_enb);
1067
1068 static struct attribute *dev_ibcfg_attributes[] = {
1069         &dev_attr_hrtbt_enable.attr,
1070         &dev_attr_link_width_enable.attr,
1071         &dev_attr_link_width.attr,
1072         &dev_attr_link_speed_enable.attr,
1073         &dev_attr_link_speed.attr,
1074         &dev_attr_rx_pol_inv_enable.attr,
1075         &dev_attr_rx_lane_rev_enable.attr,
1076         NULL
1077 };
1078
1079 static struct attribute_group dev_ibcfg_attr_group = {
1080         .attrs = dev_ibcfg_attributes
1081 };
1082
1083 /**
1084  * ipath_expose_reset - create a device reset file
1085  * @dev: the device structure
1086  *
1087  * Only expose a file that lets us reset the device after someone
1088  * enters diag mode.  A device reset is quite likely to crash the
1089  * machine entirely, so we don't want to normally make it
1090  * available.
1091  *
1092  * Called with ipath_mutex held.
1093  */
1094 int ipath_expose_reset(struct device *dev)
1095 {
1096         static int exposed;
1097         int ret;
1098
1099         if (!exposed) {
1100                 ret = device_create_file(dev, &dev_attr_reset);
1101                 exposed = 1;
1102         }
1103         else
1104                 ret = 0;
1105
1106         return ret;
1107 }
1108
1109 int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
1110 {
1111         int ret;
1112
1113         ret = sysfs_create_group(&dev->kobj, &dev_attr_group);
1114         if (ret)
1115                 goto bail;
1116
1117         ret = sysfs_create_group(&dev->kobj, &dev_counter_attr_group);
1118         if (ret)
1119                 goto bail_attrs;
1120
1121         if (dd->ipath_flags & IPATH_HAS_MULT_IB_SPEED) {
1122                 ret = device_create_file(dev, &dev_attr_jint_idle_ticks);
1123                 if (ret)
1124                         goto bail_counter;
1125                 ret = device_create_file(dev, &dev_attr_jint_max_packets);
1126                 if (ret)
1127                         goto bail_idle;
1128
1129                 ret = sysfs_create_group(&dev->kobj, &dev_ibcfg_attr_group);
1130                 if (ret)
1131                         goto bail_max;
1132         }
1133
1134         return 0;
1135
1136 bail_max:
1137         device_remove_file(dev, &dev_attr_jint_max_packets);
1138 bail_idle:
1139         device_remove_file(dev, &dev_attr_jint_idle_ticks);
1140 bail_counter:
1141         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
1142 bail_attrs:
1143         sysfs_remove_group(&dev->kobj, &dev_attr_group);
1144 bail:
1145         return ret;
1146 }
1147
1148 void ipath_device_remove_group(struct device *dev, struct ipath_devdata *dd)
1149 {
1150         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
1151
1152         if (dd->ipath_flags & IPATH_HAS_MULT_IB_SPEED) {
1153                 sysfs_remove_group(&dev->kobj, &dev_ibcfg_attr_group);
1154                 device_remove_file(dev, &dev_attr_jint_idle_ticks);
1155                 device_remove_file(dev, &dev_attr_jint_max_packets);
1156         }
1157
1158         sysfs_remove_group(&dev->kobj, &dev_attr_group);
1159
1160         device_remove_file(dev, &dev_attr_reset);
1161 }