drivers/infiniband/hw/ipath/ipath_sysfs.c

   1 /*
   2  * Copyright (c) 2006 PathScale, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/ctype.h>
  34 #include <linux/pci.h>
  35
  36 #include "ipath_kernel.h"
  37 #include "ips_common.h"
  38 #include "ipath_layer.h"
  39
  40 /**
  41  * ipath_parse_ushort - parse an unsigned short value in an arbitrary base
  42  * @str: the string containing the number
  43  * @valp: where to put the result
  44  *
  45  * returns the number of bytes consumed, or negative value on error
  46  */
  47 int ipath_parse_ushort(const char *str, unsigned short *valp)
  48 {
  49         unsigned long val;
  50         char *end;
  51         int ret;
  52
  53         if (!isdigit(str[0])) {
  54                 ret = -EINVAL;
  55                 goto bail;
  56         }
  57
  58         val = simple_strtoul(str, &end, 0);
  59
  60         if (val > 0xffff) {
  61                 ret = -EINVAL;
  62                 goto bail;
  63         }
  64
  65         *valp = val;
  66
  67         ret = end + 1 - str;
  68         if (ret == 0)
  69                 ret = -EINVAL;
  70
  71 bail:
  72         return ret;
  73 }
  74
  75 static ssize_t show_version(struct device_driver *dev, char *buf)
  76 {
  77         /* The string printed here is already newline-terminated. */
  78         return scnprintf(buf, PAGE_SIZE, "%s", ipath_core_version);
  79 }
  80
  81 static ssize_t show_num_units(struct device_driver *dev, char *buf)
  82 {
  83         return scnprintf(buf, PAGE_SIZE, "%d\n",
  84                          ipath_count_units(NULL, NULL, NULL));
  85 }
  86
  87 #define DRIVER_STAT(name, attr) \
  88         static ssize_t show_stat_##name(struct device_driver *dev, \
  89                                         char *buf) \
  90         { \
  91                 return scnprintf( \
  92                         buf, PAGE_SIZE, "%llu\n", \
  93                         (unsigned long long) ipath_stats.sps_ ##attr); \
  94         } \
  95         static DRIVER_ATTR(name, S_IRUGO, show_stat_##name, NULL)
  96
  97 DRIVER_STAT(intrs, ints);
  98 DRIVER_STAT(err_intrs, errints);
  99 DRIVER_STAT(errs, errs);
 100 DRIVER_STAT(pkt_errs, pkterrs);
 101 DRIVER_STAT(crc_errs, crcerrs);
 102 DRIVER_STAT(hw_errs, hwerrs);
 103 DRIVER_STAT(ib_link, iblink);
 104 DRIVER_STAT(port0_pkts, port0pkts);
 105 DRIVER_STAT(ether_spkts, ether_spkts);
 106 DRIVER_STAT(ether_rpkts, ether_rpkts);
 107 DRIVER_STAT(sma_spkts, sma_spkts);
 108 DRIVER_STAT(sma_rpkts, sma_rpkts);
 109 DRIVER_STAT(hdrq_full, hdrqfull);
 110 DRIVER_STAT(etid_full, etidfull);
 111 DRIVER_STAT(no_piobufs, nopiobufs);
 112 DRIVER_STAT(ports, ports);
 113 DRIVER_STAT(pkey0, pkeys[0]);
 114 DRIVER_STAT(pkey1, pkeys[1]);
 115 DRIVER_STAT(pkey2, pkeys[2]);
 116 DRIVER_STAT(pkey3, pkeys[3]);
 117 /* XXX fix the following when dynamic table of devices used */
 118 DRIVER_STAT(lid0, lid[0]);
 119 DRIVER_STAT(lid1, lid[1]);
 120 DRIVER_STAT(lid2, lid[2]);
 121 DRIVER_STAT(lid3, lid[3]);
 122
 123 DRIVER_STAT(nports, nports);
 124 DRIVER_STAT(null_intr, nullintr);
 125 DRIVER_STAT(max_pkts_call, maxpkts_call);
 126 DRIVER_STAT(avg_pkts_call, avgpkts_call);
 127 DRIVER_STAT(page_locks, pagelocks);
 128 DRIVER_STAT(page_unlocks, pageunlocks);
 129 DRIVER_STAT(krdrops, krdrops);
 130 /* XXX fix the following when dynamic table of devices used */
 131 DRIVER_STAT(mlid0, mlid[0]);
 132 DRIVER_STAT(mlid1, mlid[1]);
 133 DRIVER_STAT(mlid2, mlid[2]);
 134 DRIVER_STAT(mlid3, mlid[3]);
 135
 136 static struct attribute *driver_stat_attributes[] = {
 137         &driver_attr_intrs.attr,
 138         &driver_attr_err_intrs.attr,
 139         &driver_attr_errs.attr,
 140         &driver_attr_pkt_errs.attr,
 141         &driver_attr_crc_errs.attr,
 142         &driver_attr_hw_errs.attr,
 143         &driver_attr_ib_link.attr,
 144         &driver_attr_port0_pkts.attr,
 145         &driver_attr_ether_spkts.attr,
 146         &driver_attr_ether_rpkts.attr,
 147         &driver_attr_sma_spkts.attr,
 148         &driver_attr_sma_rpkts.attr,
 149         &driver_attr_hdrq_full.attr,
 150         &driver_attr_etid_full.attr,
 151         &driver_attr_no_piobufs.attr,
 152         &driver_attr_ports.attr,
 153         &driver_attr_pkey0.attr,
 154         &driver_attr_pkey1.attr,
 155         &driver_attr_pkey2.attr,
 156         &driver_attr_pkey3.attr,
 157         &driver_attr_lid0.attr,
 158         &driver_attr_lid1.attr,
 159         &driver_attr_lid2.attr,
 160         &driver_attr_lid3.attr,
 161         &driver_attr_nports.attr,
 162         &driver_attr_null_intr.attr,
 163         &driver_attr_max_pkts_call.attr,
 164         &driver_attr_avg_pkts_call.attr,
 165         &driver_attr_page_locks.attr,
 166         &driver_attr_page_unlocks.attr,
 167         &driver_attr_krdrops.attr,
 168         &driver_attr_mlid0.attr,
 169         &driver_attr_mlid1.attr,
 170         &driver_attr_mlid2.attr,
 171         &driver_attr_mlid3.attr,
 172         NULL
 173 };
 174
 175 static struct attribute_group driver_stat_attr_group = {
 176         .name = "stats",
 177         .attrs = driver_stat_attributes
 178 };
 179
 180 static ssize_t show_status(struct device *dev,
 181                            struct device_attribute *attr,
 182                            char *buf)
 183 {
 184         struct ipath_devdata *dd = dev_get_drvdata(dev);
 185         ssize_t ret;
 186
 187         if (!dd->ipath_statusp) {
 188                 ret = -EINVAL;
 189                 goto bail;
 190         }
 191
 192         ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
 193                         (unsigned long long) *(dd->ipath_statusp));
 194
 195 bail:
 196         return ret;
 197 }
 198
 199 static const char *ipath_status_str[] = {
 200         "Initted",
 201         "Disabled",
 202         "Admin_Disabled",
 203         "OIB_SMA",
 204         "SMA",
 205         "Present",
 206         "IB_link_up",
 207         "IB_configured",
 208         "NoIBcable",
 209         "Fatal_Hardware_Error",
 210         NULL,
 211 };
 212
 213 static ssize_t show_status_str(struct device *dev,
 214                                struct device_attribute *attr,
 215                                char *buf)
 216 {
 217         struct ipath_devdata *dd = dev_get_drvdata(dev);
 218         int i, any;
 219         u64 s;
 220         ssize_t ret;
 221
 222         if (!dd->ipath_statusp) {
 223                 ret = -EINVAL;
 224                 goto bail;
 225         }
 226
 227         s = *(dd->ipath_statusp);
 228         *buf = '\0';
 229         for (any = i = 0; s && ipath_status_str[i]; i++) {
 230                 if (s & 1) {
 231                         if (any && strlcat(buf, " ", PAGE_SIZE) >=
 232                             PAGE_SIZE)
 233                                 /* overflow */
 234                                 break;
 235                         if (strlcat(buf, ipath_status_str[i],
 236                                     PAGE_SIZE) >= PAGE_SIZE)
 237                                 break;
 238                         any = 1;
 239                 }
 240                 s >>= 1;
 241         }
 242         if (any)
 243                 strlcat(buf, "\n", PAGE_SIZE);
 244
 245         ret = strlen(buf);
 246
 247 bail:
 248         return ret;
 249 }
 250
 251 static ssize_t show_boardversion(struct device *dev,
 252                                struct device_attribute *attr,
 253                                char *buf)
 254 {
 255         struct ipath_devdata *dd = dev_get_drvdata(dev);
 256         /* The string printed here is already newline-terminated. */
 257         return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
 258 }
 259
 260 static ssize_t show_lid(struct device *dev,
 261                         struct device_attribute *attr,
 262                         char *buf)
 263 {
 264         struct ipath_devdata *dd = dev_get_drvdata(dev);
 265
 266         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_lid);
 267 }
 268
 269 static ssize_t store_lid(struct device *dev,
 270                          struct device_attribute *attr,
 271                           const char *buf,
 272                           size_t count)
 273 {
 274         struct ipath_devdata *dd = dev_get_drvdata(dev);
 275         u16 lid;
 276         int ret;
 277
 278         ret = ipath_parse_ushort(buf, &lid);
 279         if (ret < 0)
 280                 goto invalid;
 281
 282         if (lid == 0 || lid >= 0xc000) {
 283                 ret = -EINVAL;
 284                 goto invalid;
 285         }
 286
 287         ipath_set_sps_lid(dd, lid, 0);
 288
 289         goto bail;
 290 invalid:
 291         ipath_dev_err(dd, "attempt to set invalid LID\n");
 292 bail:
 293         return ret;
 294 }
 295
 296 static ssize_t show_mlid(struct device *dev,
 297                          struct device_attribute *attr,
 298                          char *buf)
 299 {
 300         struct ipath_devdata *dd = dev_get_drvdata(dev);
 301
 302         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_mlid);
 303 }
 304
 305 static ssize_t store_mlid(struct device *dev,
 306                          struct device_attribute *attr,
 307                           const char *buf,
 308                           size_t count)
 309 {
 310         struct ipath_devdata *dd = dev_get_drvdata(dev);
 311         int unit;
 312         u16 mlid;
 313         int ret;
 314
 315         ret = ipath_parse_ushort(buf, &mlid);
 316         if (ret < 0)
 317                 goto invalid;
 318
 319         unit = dd->ipath_unit;
 320
 321         dd->ipath_mlid = mlid;
 322         ipath_stats.sps_mlid[unit] = mlid;
 323         ipath_layer_intr(dd, IPATH_LAYER_INT_BCAST);
 324
 325         goto bail;
 326 invalid:
 327         ipath_dev_err(dd, "attempt to set invalid MLID\n");
 328 bail:
 329         return ret;
 330 }
 331
 332 static ssize_t show_guid(struct device *dev,
 333                          struct device_attribute *attr,
 334                          char *buf)
 335 {
 336         struct ipath_devdata *dd = dev_get_drvdata(dev);
 337         u8 *guid;
 338
 339         guid = (u8 *) & (dd->ipath_guid);
 340
 341         return scnprintf(buf, PAGE_SIZE,
 342                          "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
 343                          guid[0], guid[1], guid[2], guid[3],
 344                          guid[4], guid[5], guid[6], guid[7]);
 345 }
 346
 347 static ssize_t store_guid(struct device *dev,
 348                          struct device_attribute *attr,
 349                           const char *buf,
 350                           size_t count)
 351 {
 352         struct ipath_devdata *dd = dev_get_drvdata(dev);
 353         ssize_t ret;
 354         unsigned short guid[8];
 355         __be64 nguid;
 356         u8 *ng;
 357         int i;
 358
 359         if (sscanf(buf, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
 360                    &guid[0], &guid[1], &guid[2], &guid[3],
 361                    &guid[4], &guid[5], &guid[6], &guid[7]) != 8)
 362                 goto invalid;
 363
 364         ng = (u8 *) &nguid;
 365
 366         for (i = 0; i < 8; i++) {
 367                 if (guid[i] > 0xff)
 368                         goto invalid;
 369                 ng[i] = guid[i];
 370         }
 371
 372         dd->ipath_guid = nguid;
 373         dd->ipath_nguid = 1;
 374
 375         ret = strlen(buf);
 376         goto bail;
 377
 378 invalid:
 379         ipath_dev_err(dd, "attempt to set invalid GUID\n");
 380         ret = -EINVAL;
 381
 382 bail:
 383         return ret;
 384 }
 385
 386 static ssize_t show_nguid(struct device *dev,
 387                           struct device_attribute *attr,
 388                           char *buf)
 389 {
 390         struct ipath_devdata *dd = dev_get_drvdata(dev);
 391
 392         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_nguid);
 393 }
 394
 395 static ssize_t show_serial(struct device *dev,
 396                            struct device_attribute *attr,
 397                            char *buf)
 398 {
 399         struct ipath_devdata *dd = dev_get_drvdata(dev);
 400
 401         buf[sizeof dd->ipath_serial] = '\0';
 402         memcpy(buf, dd->ipath_serial, sizeof dd->ipath_serial);
 403         strcat(buf, "\n");
 404         return strlen(buf);
 405 }
 406
 407 static ssize_t show_unit(struct device *dev,
 408                          struct device_attribute *attr,
 409                          char *buf)
 410 {
 411         struct ipath_devdata *dd = dev_get_drvdata(dev);
 412
 413         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_unit);
 414 }
 415
 416 #define DEVICE_COUNTER(name, attr) \
 417         static ssize_t show_counter_##name(struct device *dev, \
 418                                            struct device_attribute *attr, \
 419                                            char *buf) \
 420         { \
 421                 struct ipath_devdata *dd = dev_get_drvdata(dev); \
 422                 return scnprintf(\
 423                         buf, PAGE_SIZE, "%llu\n", (unsigned long long) \
 424                         ipath_snap_cntr( \
 425                                 dd, offsetof(struct infinipath_counters, \
 426                                              attr) / sizeof(u64)));     \
 427         } \
 428         static DEVICE_ATTR(name, S_IRUGO, show_counter_##name, NULL);
 429
 430 DEVICE_COUNTER(ib_link_downeds, IBLinkDownedCnt);
 431 DEVICE_COUNTER(ib_link_err_recoveries, IBLinkErrRecoveryCnt);
 432 DEVICE_COUNTER(ib_status_changes, IBStatusChangeCnt);
 433 DEVICE_COUNTER(ib_symbol_errs, IBSymbolErrCnt);
 434 DEVICE_COUNTER(lb_flow_stalls, LBFlowStallCnt);
 435 DEVICE_COUNTER(lb_ints, LBIntCnt);
 436 DEVICE_COUNTER(rx_bad_formats, RxBadFormatCnt);
 437 DEVICE_COUNTER(rx_buf_ovfls, RxBufOvflCnt);
 438 DEVICE_COUNTER(rx_data_pkts, RxDataPktCnt);
 439 DEVICE_COUNTER(rx_dropped_pkts, RxDroppedPktCnt);
 440 DEVICE_COUNTER(rx_dwords, RxDwordCnt);
 441 DEVICE_COUNTER(rx_ebps, RxEBPCnt);
 442 DEVICE_COUNTER(rx_flow_ctrl_errs, RxFlowCtrlErrCnt);
 443 DEVICE_COUNTER(rx_flow_pkts, RxFlowPktCnt);
 444 DEVICE_COUNTER(rx_icrc_errs, RxICRCErrCnt);
 445 DEVICE_COUNTER(rx_len_errs, RxLenErrCnt);
 446 DEVICE_COUNTER(rx_link_problems, RxLinkProblemCnt);
 447 DEVICE_COUNTER(rx_lpcrc_errs, RxLPCRCErrCnt);
 448 DEVICE_COUNTER(rx_max_min_len_errs, RxMaxMinLenErrCnt);
 449 DEVICE_COUNTER(rx_p0_hdr_egr_ovfls, RxP0HdrEgrOvflCnt);
 450 DEVICE_COUNTER(rx_p1_hdr_egr_ovfls, RxP1HdrEgrOvflCnt);
 451 DEVICE_COUNTER(rx_p2_hdr_egr_ovfls, RxP2HdrEgrOvflCnt);
 452 DEVICE_COUNTER(rx_p3_hdr_egr_ovfls, RxP3HdrEgrOvflCnt);
 453 DEVICE_COUNTER(rx_p4_hdr_egr_ovfls, RxP4HdrEgrOvflCnt);
 454 DEVICE_COUNTER(rx_p5_hdr_egr_ovfls, RxP5HdrEgrOvflCnt);
 455 DEVICE_COUNTER(rx_p6_hdr_egr_ovfls, RxP6HdrEgrOvflCnt);
 456 DEVICE_COUNTER(rx_p7_hdr_egr_ovfls, RxP7HdrEgrOvflCnt);
 457 DEVICE_COUNTER(rx_p8_hdr_egr_ovfls, RxP8HdrEgrOvflCnt);
 458 DEVICE_COUNTER(rx_pkey_mismatches, RxPKeyMismatchCnt);
 459 DEVICE_COUNTER(rx_tid_full_errs, RxTIDFullErrCnt);
 460 DEVICE_COUNTER(rx_tid_valid_errs, RxTIDValidErrCnt);
 461 DEVICE_COUNTER(rx_vcrc_errs, RxVCRCErrCnt);
 462 DEVICE_COUNTER(tx_data_pkts, TxDataPktCnt);
 463 DEVICE_COUNTER(tx_dropped_pkts, TxDroppedPktCnt);
 464 DEVICE_COUNTER(tx_dwords, TxDwordCnt);
 465 DEVICE_COUNTER(tx_flow_pkts, TxFlowPktCnt);
 466 DEVICE_COUNTER(tx_flow_stalls, TxFlowStallCnt);
 467 DEVICE_COUNTER(tx_len_errs, TxLenErrCnt);
 468 DEVICE_COUNTER(tx_max_min_len_errs, TxMaxMinLenErrCnt);
 469 DEVICE_COUNTER(tx_underruns, TxUnderrunCnt);
 470 DEVICE_COUNTER(tx_unsup_vl_errs, TxUnsupVLErrCnt);
 471
 472 static struct attribute *dev_counter_attributes[] = {
 473         &dev_attr_ib_link_downeds.attr,
 474         &dev_attr_ib_link_err_recoveries.attr,
 475         &dev_attr_ib_status_changes.attr,
 476         &dev_attr_ib_symbol_errs.attr,
 477         &dev_attr_lb_flow_stalls.attr,
 478         &dev_attr_lb_ints.attr,
 479         &dev_attr_rx_bad_formats.attr,
 480         &dev_attr_rx_buf_ovfls.attr,
 481         &dev_attr_rx_data_pkts.attr,
 482         &dev_attr_rx_dropped_pkts.attr,
 483         &dev_attr_rx_dwords.attr,
 484         &dev_attr_rx_ebps.attr,
 485         &dev_attr_rx_flow_ctrl_errs.attr,
 486         &dev_attr_rx_flow_pkts.attr,
 487         &dev_attr_rx_icrc_errs.attr,
 488         &dev_attr_rx_len_errs.attr,
 489         &dev_attr_rx_link_problems.attr,
 490         &dev_attr_rx_lpcrc_errs.attr,
 491         &dev_attr_rx_max_min_len_errs.attr,
 492         &dev_attr_rx_p0_hdr_egr_ovfls.attr,
 493         &dev_attr_rx_p1_hdr_egr_ovfls.attr,
 494         &dev_attr_rx_p2_hdr_egr_ovfls.attr,
 495         &dev_attr_rx_p3_hdr_egr_ovfls.attr,
 496         &dev_attr_rx_p4_hdr_egr_ovfls.attr,
 497         &dev_attr_rx_p5_hdr_egr_ovfls.attr,
 498         &dev_attr_rx_p6_hdr_egr_ovfls.attr,
 499         &dev_attr_rx_p7_hdr_egr_ovfls.attr,
 500         &dev_attr_rx_p8_hdr_egr_ovfls.attr,
 501         &dev_attr_rx_pkey_mismatches.attr,
 502         &dev_attr_rx_tid_full_errs.attr,
 503         &dev_attr_rx_tid_valid_errs.attr,
 504         &dev_attr_rx_vcrc_errs.attr,
 505         &dev_attr_tx_data_pkts.attr,
 506         &dev_attr_tx_dropped_pkts.attr,
 507         &dev_attr_tx_dwords.attr,
 508         &dev_attr_tx_flow_pkts.attr,
 509         &dev_attr_tx_flow_stalls.attr,
 510         &dev_attr_tx_len_errs.attr,
 511         &dev_attr_tx_max_min_len_errs.attr,
 512         &dev_attr_tx_underruns.attr,
 513         &dev_attr_tx_unsup_vl_errs.attr,
 514         NULL
 515 };
 516
 517 static struct attribute_group dev_counter_attr_group = {
 518         .name = "counters",
 519         .attrs = dev_counter_attributes
 520 };
 521
 522 static ssize_t store_reset(struct device *dev,
 523                          struct device_attribute *attr,
 524                           const char *buf,
 525                           size_t count)
 526 {
 527         struct ipath_devdata *dd = dev_get_drvdata(dev);
 528         int ret;
 529
 530         if (count < 5 || memcmp(buf, "reset", 5)) {
 531                 ret = -EINVAL;
 532                 goto bail;
 533         }
 534
 535         if (dd->ipath_flags & IPATH_DISABLED) {
 536                 /*
 537                  * post-reset init would re-enable interrupts, etc.
 538                  * so don't allow reset on disabled devices.  Not
 539                  * perfect error, but about the best choice.
 540                  */
 541                 dev_info(dev,"Unit %d is disabled, can't reset\n",
 542                          dd->ipath_unit);
 543                 ret = -EINVAL;
 544         }
 545         ret = ipath_reset_device(dd->ipath_unit);
 546 bail:
 547         return ret<0 ? ret : count;
 548 }
 549
 550 static ssize_t store_link_state(struct device *dev,
 551                          struct device_attribute *attr,
 552                           const char *buf,
 553                           size_t count)
 554 {
 555         struct ipath_devdata *dd = dev_get_drvdata(dev);
 556         int ret, r;
 557         u16 state;
 558
 559         ret = ipath_parse_ushort(buf, &state);
 560         if (ret < 0)
 561                 goto invalid;
 562
 563         r = ipath_layer_set_linkstate(dd, state);
 564         if (r < 0) {
 565                 ret = r;
 566                 goto bail;
 567         }
 568
 569         goto bail;
 570 invalid:
 571         ipath_dev_err(dd, "attempt to set invalid link state\n");
 572 bail:
 573         return ret;
 574 }
 575
 576 static ssize_t show_mtu(struct device *dev,
 577                          struct device_attribute *attr,
 578                          char *buf)
 579 {
 580         struct ipath_devdata *dd = dev_get_drvdata(dev);
 581         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_ibmtu);
 582 }
 583
 584 static ssize_t store_mtu(struct device *dev,
 585                          struct device_attribute *attr,
 586                           const char *buf,
 587                           size_t count)
 588 {
 589         struct ipath_devdata *dd = dev_get_drvdata(dev);
 590         ssize_t ret;
 591         u16 mtu = 0;
 592         int r;
 593
 594         ret = ipath_parse_ushort(buf, &mtu);
 595         if (ret < 0)
 596                 goto invalid;
 597
 598         r = ipath_layer_set_mtu(dd, mtu);
 599         if (r < 0)
 600                 ret = r;
 601
 602         goto bail;
 603 invalid:
 604         ipath_dev_err(dd, "attempt to set invalid MTU\n");
 605 bail:
 606         return ret;
 607 }
 608
 609 static ssize_t show_enabled(struct device *dev,
 610                          struct device_attribute *attr,
 611                          char *buf)
 612 {
 613         struct ipath_devdata *dd = dev_get_drvdata(dev);
 614         return scnprintf(buf, PAGE_SIZE, "%u\n",
 615                          (dd->ipath_flags & IPATH_DISABLED) ? 0 : 1);
 616 }
 617
 618 static ssize_t store_enabled(struct device *dev,
 619                          struct device_attribute *attr,
 620                           const char *buf,
 621                           size_t count)
 622 {
 623         struct ipath_devdata *dd = dev_get_drvdata(dev);
 624         ssize_t ret;
 625         u16 enable = 0;
 626
 627         ret = ipath_parse_ushort(buf, &enable);
 628         if (ret < 0) {
 629                 ipath_dev_err(dd, "attempt to use non-numeric on enable\n");
 630                 goto bail;
 631         }
 632
 633         if (enable) {
 634                 if (!(dd->ipath_flags & IPATH_DISABLED))
 635                         goto bail;
 636
 637                 dev_info(dev, "Enabling unit %d\n", dd->ipath_unit);
 638                 /* same as post-reset */
 639                 ret = ipath_init_chip(dd, 1);
 640                 if (ret)
 641                         ipath_dev_err(dd, "Failed to enable unit %d\n",
 642                                       dd->ipath_unit);
 643                 else {
 644                         dd->ipath_flags &= ~IPATH_DISABLED;
 645                         *dd->ipath_statusp &= ~IPATH_STATUS_ADMIN_DISABLED;
 646                 }
 647         }
 648         else if (!(dd->ipath_flags & IPATH_DISABLED)) {
 649                 dev_info(dev, "Disabling unit %d\n", dd->ipath_unit);
 650                 ipath_shutdown_device(dd);
 651                 dd->ipath_flags |= IPATH_DISABLED;
 652                 *dd->ipath_statusp |= IPATH_STATUS_ADMIN_DISABLED;
 653         }
 654
 655 bail:
 656         return ret;
 657 }
 658
 659 static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
 660 static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);
 661
 662 static struct attribute *driver_attributes[] = {
 663         &driver_attr_num_units.attr,
 664         &driver_attr_version.attr,
 665         NULL
 666 };
 667
 668 static struct attribute_group driver_attr_group = {
 669         .attrs = driver_attributes
 670 };
 671
 672 static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
 673 static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
 674 static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
 675 static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
 676 static DEVICE_ATTR(mtu, S_IWUSR | S_IRUGO, show_mtu, store_mtu);
 677 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO, show_enabled, store_enabled);
 678 static DEVICE_ATTR(nguid, S_IRUGO, show_nguid, NULL);
 679 static DEVICE_ATTR(reset, S_IWUSR, NULL, store_reset);
 680 static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
 681 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
 682 static DEVICE_ATTR(status_str, S_IRUGO, show_status_str, NULL);
 683 static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
 684 static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
 685
 686 static struct attribute *dev_attributes[] = {
 687         &dev_attr_guid.attr,
 688         &dev_attr_lid.attr,
 689         &dev_attr_link_state.attr,
 690         &dev_attr_mlid.attr,
 691         &dev_attr_mtu.attr,
 692         &dev_attr_nguid.attr,
 693         &dev_attr_serial.attr,
 694         &dev_attr_status.attr,
 695         &dev_attr_status_str.attr,
 696         &dev_attr_boardversion.attr,
 697         &dev_attr_unit.attr,
 698         &dev_attr_enabled.attr,
 699         NULL
 700 };
 701
 702 static struct attribute_group dev_attr_group = {
 703         .attrs = dev_attributes
 704 };
 705
 706 /**
 707  * ipath_expose_reset - create a device reset file
 708  * @dev: the device structure
 709  *
 710  * Only expose a file that lets us reset the device after someone
 711  * enters diag mode.  A device reset is quite likely to crash the
 712  * machine entirely, so we don't want to normally make it
 713  * available.
 714  *
 715  * Called with ipath_mutex held.
 716  */
 717 int ipath_expose_reset(struct device *dev)
 718 {
 719         static int exposed;
 720         int ret;
 721
 722         if (!exposed) {
 723                 ret = device_create_file(dev, &dev_attr_reset);
 724                 exposed = 1;
 725         }
 726         else
 727                 ret = 0;
 728
 729         return ret;
 730 }
 731
 732 int ipath_driver_create_group(struct device_driver *drv)
 733 {
 734         int ret;
 735
 736         ret = sysfs_create_group(&drv->kobj, &driver_attr_group);
 737         if (ret)
 738                 goto bail;
 739
 740         ret = sysfs_create_group(&drv->kobj, &driver_stat_attr_group);
 741         if (ret)
 742                 sysfs_remove_group(&drv->kobj, &driver_attr_group);
 743
 744 bail:
 745         return ret;
 746 }
 747
 748 void ipath_driver_remove_group(struct device_driver *drv)
 749 {
 750         sysfs_remove_group(&drv->kobj, &driver_stat_attr_group);
 751         sysfs_remove_group(&drv->kobj, &driver_attr_group);
 752 }
 753
 754 int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
 755 {
 756         int ret;
 757         char unit[5];
 758
 759         ret = sysfs_create_group(&dev->kobj, &dev_attr_group);
 760         if (ret)
 761                 goto bail;
 762
 763         ret = sysfs_create_group(&dev->kobj, &dev_counter_attr_group);
 764         if (ret)
 765                 goto bail_attrs;
 766
 767         snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
 768         ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj, unit);
 769         if (ret == 0)
 770                 goto bail;
 771
 772         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
 773 bail_attrs:
 774         sysfs_remove_group(&dev->kobj, &dev_attr_group);
 775 bail:
 776         return ret;
 777 }
 778
 779 void ipath_device_remove_group(struct device *dev, struct ipath_devdata *dd)
 780 {
 781         char unit[5];
 782
 783         snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
 784         sysfs_remove_link(&dev->driver->kobj, unit);
 785
 786         sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
 787         sysfs_remove_group(&dev->kobj, &dev_attr_group);
 788
 789         device_remove_file(dev, &dev_attr_reset);
 790 }