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