drivers/infiniband/hw/qib/qib_sysfs.c

   1 /*
   2  * Copyright (c) 2012 Intel Corporation.  All rights reserved.
   3  * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
   4  * Copyright (c) 2006 PathScale, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34 #include <linux/ctype.h>
  35
  36 #include "qib.h"
  37 #include "qib_mad.h"
  38
  39 /* start of per-port functions */
  40 /*
  41  * Get/Set heartbeat enable. OR of 1=enabled, 2=auto
  42  */
  43 static ssize_t show_hrtbt_enb(struct qib_pportdata *ppd, char *buf)
  44 {
  45         struct qib_devdata *dd = ppd->dd;
  46         int ret;
  47
  48         ret = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_HRTBT);
  49         ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
  50         return ret;
  51 }
  52
  53 static ssize_t store_hrtbt_enb(struct qib_pportdata *ppd, const char *buf,
  54                                size_t count)
  55 {
  56         struct qib_devdata *dd = ppd->dd;
  57         int ret;
  58         u16 val;
  59
  60         ret = kstrtou16(buf, 0, &val);
  61         if (ret) {
  62                 qib_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
  63                 return ret;
  64         }
  65
  66         /*
  67          * Set the "intentional" heartbeat enable per either of
  68          * "Enable" and "Auto", as these are normally set together.
  69          * This bit is consulted when leaving loopback mode,
  70          * because entering loopback mode overrides it and automatically
  71          * disables heartbeat.
  72          */
  73         ret = dd->f_set_ib_cfg(ppd, QIB_IB_CFG_HRTBT, val);
  74         return ret < 0 ? ret : count;
  75 }
  76
  77 static ssize_t store_loopback(struct qib_pportdata *ppd, const char *buf,
  78                               size_t count)
  79 {
  80         struct qib_devdata *dd = ppd->dd;
  81         int ret = count, r;
  82
  83         r = dd->f_set_ib_loopback(ppd, buf);
  84         if (r < 0)
  85                 ret = r;
  86
  87         return ret;
  88 }
  89
  90 static ssize_t store_led_override(struct qib_pportdata *ppd, const char *buf,
  91                                   size_t count)
  92 {
  93         struct qib_devdata *dd = ppd->dd;
  94         int ret;
  95         u16 val;
  96
  97         ret = kstrtou16(buf, 0, &val);
  98         if (ret) {
  99                 qib_dev_err(dd, "attempt to set invalid LED override\n");
 100                 return ret;
 101         }
 102
 103         qib_set_led_override(ppd, val);
 104         return count;
 105 }
 106
 107 static ssize_t show_status(struct qib_pportdata *ppd, char *buf)
 108 {
 109         ssize_t ret;
 110
 111         if (!ppd->statusp)
 112                 ret = -EINVAL;
 113         else
 114                 ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
 115                                 (unsigned long long) *(ppd->statusp));
 116         return ret;
 117 }
 118
 119 /*
 120  * For userland compatibility, these offsets must remain fixed.
 121  * They are strings for QIB_STATUS_*
 122  */
 123 static const char * const qib_status_str[] = {
 124         "Initted",
 125         "",
 126         "",
 127         "",
 128         "",
 129         "Present",
 130         "IB_link_up",
 131         "IB_configured",
 132         "",
 133         "Fatal_Hardware_Error",
 134         NULL,
 135 };
 136
 137 static ssize_t show_status_str(struct qib_pportdata *ppd, char *buf)
 138 {
 139         int i, any;
 140         u64 s;
 141         ssize_t ret;
 142
 143         if (!ppd->statusp) {
 144                 ret = -EINVAL;
 145                 goto bail;
 146         }
 147
 148         s = *(ppd->statusp);
 149         *buf = '\0';
 150         for (any = i = 0; s && qib_status_str[i]; i++) {
 151                 if (s & 1) {
 152                         /* if overflow */
 153                         if (any && strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
 154                                 break;
 155                         if (strlcat(buf, qib_status_str[i], PAGE_SIZE) >=
 156                                         PAGE_SIZE)
 157                                 break;
 158                         any = 1;
 159                 }
 160                 s >>= 1;
 161         }
 162         if (any)
 163                 strlcat(buf, "\n", PAGE_SIZE);
 164
 165         ret = strlen(buf);
 166
 167 bail:
 168         return ret;
 169 }
 170
 171 /* end of per-port functions */
 172
 173 /*
 174  * Start of per-port file structures and support code
 175  * Because we are fitting into other infrastructure, we have to supply the
 176  * full set of kobject/sysfs_ops structures and routines.
 177  */
 178 #define QIB_PORT_ATTR(name, mode, show, store) \
 179         static struct qib_port_attr qib_port_attr_##name = \
 180                 __ATTR(name, mode, show, store)
 181
 182 struct qib_port_attr {
 183         struct attribute attr;
 184         ssize_t (*show)(struct qib_pportdata *, char *);
 185         ssize_t (*store)(struct qib_pportdata *, const char *, size_t);
 186 };
 187
 188 QIB_PORT_ATTR(loopback, S_IWUSR, NULL, store_loopback);
 189 QIB_PORT_ATTR(led_override, S_IWUSR, NULL, store_led_override);
 190 QIB_PORT_ATTR(hrtbt_enable, S_IWUSR | S_IRUGO, show_hrtbt_enb,
 191               store_hrtbt_enb);
 192 QIB_PORT_ATTR(status, S_IRUGO, show_status, NULL);
 193 QIB_PORT_ATTR(status_str, S_IRUGO, show_status_str, NULL);
 194
 195 static struct attribute *port_default_attributes[] = {
 196         &qib_port_attr_loopback.attr,
 197         &qib_port_attr_led_override.attr,
 198         &qib_port_attr_hrtbt_enable.attr,
 199         &qib_port_attr_status.attr,
 200         &qib_port_attr_status_str.attr,
 201         NULL
 202 };
 203
 204 /*
 205  * Start of per-port congestion control structures and support code
 206  */
 207
 208 /*
 209  * Congestion control table size followed by table entries
 210  */
 211 static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
 212                 struct bin_attribute *bin_attr,
 213                 char *buf, loff_t pos, size_t count)
 214 {
 215         int ret;
 216         struct qib_pportdata *ppd =
 217                 container_of(kobj, struct qib_pportdata, pport_cc_kobj);
 218
 219         if (!qib_cc_table_size || !ppd->ccti_entries_shadow)
 220                 return -EINVAL;
 221
 222         ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
 223                  + sizeof(__be16);
 224
 225         if (pos > ret)
 226                 return -EINVAL;
 227
 228         if (count > ret - pos)
 229                 count = ret - pos;
 230
 231         if (!count)
 232                 return count;
 233
 234         spin_lock(&ppd->cc_shadow_lock);
 235         memcpy(buf, ppd->ccti_entries_shadow, count);
 236         spin_unlock(&ppd->cc_shadow_lock);
 237
 238         return count;
 239 }
 240
 241 static void qib_port_release(struct kobject *kobj)
 242 {
 243         /* nothing to do since memory is freed by qib_free_devdata() */
 244 }
 245
 246 static struct kobj_type qib_port_cc_ktype = {
 247         .release = qib_port_release,
 248 };
 249
 250 static struct bin_attribute cc_table_bin_attr = {
 251         .attr = {.name = "cc_table_bin", .mode = 0444},
 252         .read = read_cc_table_bin,
 253         .size = PAGE_SIZE,
 254 };
 255
 256 /*
 257  * Congestion settings: port control, control map and an array of 16
 258  * entries for the congestion entries - increase, timer, event log
 259  * trigger threshold and the minimum injection rate delay.
 260  */
 261 static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
 262                 struct bin_attribute *bin_attr,
 263                 char *buf, loff_t pos, size_t count)
 264 {
 265         int ret;
 266         struct qib_pportdata *ppd =
 267                 container_of(kobj, struct qib_pportdata, pport_cc_kobj);
 268
 269         if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
 270                 return -EINVAL;
 271
 272         ret = sizeof(struct ib_cc_congestion_setting_attr_shadow);
 273
 274         if (pos > ret)
 275                 return -EINVAL;
 276         if (count > ret - pos)
 277                 count = ret - pos;
 278
 279         if (!count)
 280                 return count;
 281
 282         spin_lock(&ppd->cc_shadow_lock);
 283         memcpy(buf, ppd->congestion_entries_shadow, count);
 284         spin_unlock(&ppd->cc_shadow_lock);
 285
 286         return count;
 287 }
 288
 289 static struct bin_attribute cc_setting_bin_attr = {
 290         .attr = {.name = "cc_settings_bin", .mode = 0444},
 291         .read = read_cc_setting_bin,
 292         .size = PAGE_SIZE,
 293 };
 294
 295
 296 static ssize_t qib_portattr_show(struct kobject *kobj,
 297         struct attribute *attr, char *buf)
 298 {
 299         struct qib_port_attr *pattr =
 300                 container_of(attr, struct qib_port_attr, attr);
 301         struct qib_pportdata *ppd =
 302                 container_of(kobj, struct qib_pportdata, pport_kobj);
 303
 304         if (!pattr->show)
 305                 return -EIO;
 306
 307         return pattr->show(ppd, buf);
 308 }
 309
 310 static ssize_t qib_portattr_store(struct kobject *kobj,
 311         struct attribute *attr, const char *buf, size_t len)
 312 {
 313         struct qib_port_attr *pattr =
 314                 container_of(attr, struct qib_port_attr, attr);
 315         struct qib_pportdata *ppd =
 316                 container_of(kobj, struct qib_pportdata, pport_kobj);
 317
 318         if (!pattr->store)
 319                 return -EIO;
 320
 321         return pattr->store(ppd, buf, len);
 322 }
 323
 324
 325 static const struct sysfs_ops qib_port_ops = {
 326         .show = qib_portattr_show,
 327         .store = qib_portattr_store,
 328 };
 329
 330 static struct kobj_type qib_port_ktype = {
 331         .release = qib_port_release,
 332         .sysfs_ops = &qib_port_ops,
 333         .default_attrs = port_default_attributes
 334 };
 335
 336 /* Start sl2vl */
 337
 338 #define QIB_SL2VL_ATTR(N) \
 339         static struct qib_sl2vl_attr qib_sl2vl_attr_##N = { \
 340                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 341                 .sl = N \
 342         }
 343
 344 struct qib_sl2vl_attr {
 345         struct attribute attr;
 346         int sl;
 347 };
 348
 349 QIB_SL2VL_ATTR(0);
 350 QIB_SL2VL_ATTR(1);
 351 QIB_SL2VL_ATTR(2);
 352 QIB_SL2VL_ATTR(3);
 353 QIB_SL2VL_ATTR(4);
 354 QIB_SL2VL_ATTR(5);
 355 QIB_SL2VL_ATTR(6);
 356 QIB_SL2VL_ATTR(7);
 357 QIB_SL2VL_ATTR(8);
 358 QIB_SL2VL_ATTR(9);
 359 QIB_SL2VL_ATTR(10);
 360 QIB_SL2VL_ATTR(11);
 361 QIB_SL2VL_ATTR(12);
 362 QIB_SL2VL_ATTR(13);
 363 QIB_SL2VL_ATTR(14);
 364 QIB_SL2VL_ATTR(15);
 365
 366 static struct attribute *sl2vl_default_attributes[] = {
 367         &qib_sl2vl_attr_0.attr,
 368         &qib_sl2vl_attr_1.attr,
 369         &qib_sl2vl_attr_2.attr,
 370         &qib_sl2vl_attr_3.attr,
 371         &qib_sl2vl_attr_4.attr,
 372         &qib_sl2vl_attr_5.attr,
 373         &qib_sl2vl_attr_6.attr,
 374         &qib_sl2vl_attr_7.attr,
 375         &qib_sl2vl_attr_8.attr,
 376         &qib_sl2vl_attr_9.attr,
 377         &qib_sl2vl_attr_10.attr,
 378         &qib_sl2vl_attr_11.attr,
 379         &qib_sl2vl_attr_12.attr,
 380         &qib_sl2vl_attr_13.attr,
 381         &qib_sl2vl_attr_14.attr,
 382         &qib_sl2vl_attr_15.attr,
 383         NULL
 384 };
 385
 386 static ssize_t sl2vl_attr_show(struct kobject *kobj, struct attribute *attr,
 387                                char *buf)
 388 {
 389         struct qib_sl2vl_attr *sattr =
 390                 container_of(attr, struct qib_sl2vl_attr, attr);
 391         struct qib_pportdata *ppd =
 392                 container_of(kobj, struct qib_pportdata, sl2vl_kobj);
 393         struct qib_ibport *qibp = &ppd->ibport_data;
 394
 395         return sprintf(buf, "%u\n", qibp->sl_to_vl[sattr->sl]);
 396 }
 397
 398 static const struct sysfs_ops qib_sl2vl_ops = {
 399         .show = sl2vl_attr_show,
 400 };
 401
 402 static struct kobj_type qib_sl2vl_ktype = {
 403         .release = qib_port_release,
 404         .sysfs_ops = &qib_sl2vl_ops,
 405         .default_attrs = sl2vl_default_attributes
 406 };
 407
 408 /* End sl2vl */
 409
 410 /* Start diag_counters */
 411
 412 #define QIB_DIAGC_ATTR(N) \
 413         static struct qib_diagc_attr qib_diagc_attr_##N = { \
 414                 .attr = { .name = __stringify(N), .mode = 0664 }, \
 415                 .counter = offsetof(struct qib_ibport, rvp.n_##N) \
 416         }
 417
 418 #define QIB_DIAGC_ATTR_PER_CPU(N) \
 419         static struct qib_diagc_attr qib_diagc_attr_##N = { \
 420                 .attr = { .name = __stringify(N), .mode = 0664 }, \
 421                 .counter = offsetof(struct qib_ibport, rvp.z_##N) \
 422         }
 423
 424 struct qib_diagc_attr {
 425         struct attribute attr;
 426         size_t counter;
 427 };
 428
 429 QIB_DIAGC_ATTR_PER_CPU(rc_acks);
 430 QIB_DIAGC_ATTR_PER_CPU(rc_qacks);
 431 QIB_DIAGC_ATTR_PER_CPU(rc_delayed_comp);
 432
 433 QIB_DIAGC_ATTR(rc_resends);
 434 QIB_DIAGC_ATTR(seq_naks);
 435 QIB_DIAGC_ATTR(rdma_seq);
 436 QIB_DIAGC_ATTR(rnr_naks);
 437 QIB_DIAGC_ATTR(other_naks);
 438 QIB_DIAGC_ATTR(rc_timeouts);
 439 QIB_DIAGC_ATTR(loop_pkts);
 440 QIB_DIAGC_ATTR(pkt_drops);
 441 QIB_DIAGC_ATTR(dmawait);
 442 QIB_DIAGC_ATTR(unaligned);
 443 QIB_DIAGC_ATTR(rc_dupreq);
 444 QIB_DIAGC_ATTR(rc_seqnak);
 445
 446 static struct attribute *diagc_default_attributes[] = {
 447         &qib_diagc_attr_rc_resends.attr,
 448         &qib_diagc_attr_rc_acks.attr,
 449         &qib_diagc_attr_rc_qacks.attr,
 450         &qib_diagc_attr_rc_delayed_comp.attr,
 451         &qib_diagc_attr_seq_naks.attr,
 452         &qib_diagc_attr_rdma_seq.attr,
 453         &qib_diagc_attr_rnr_naks.attr,
 454         &qib_diagc_attr_other_naks.attr,
 455         &qib_diagc_attr_rc_timeouts.attr,
 456         &qib_diagc_attr_loop_pkts.attr,
 457         &qib_diagc_attr_pkt_drops.attr,
 458         &qib_diagc_attr_dmawait.attr,
 459         &qib_diagc_attr_unaligned.attr,
 460         &qib_diagc_attr_rc_dupreq.attr,
 461         &qib_diagc_attr_rc_seqnak.attr,
 462         NULL
 463 };
 464
 465 static u64 get_all_cpu_total(u64 __percpu *cntr)
 466 {
 467         int cpu;
 468         u64 counter = 0;
 469
 470         for_each_possible_cpu(cpu)
 471                 counter += *per_cpu_ptr(cntr, cpu);
 472         return counter;
 473 }
 474
 475 #define def_write_per_cpu(cntr) \
 476 static void write_per_cpu_##cntr(struct qib_pportdata *ppd, u32 data)   \
 477 {                                                                       \
 478         struct qib_devdata *dd = ppd->dd;                               \
 479         struct qib_ibport *qibp = &ppd->ibport_data;                    \
 480         /*  A write can only zero the counter */                        \
 481         if (data == 0)                                                  \
 482                 qibp->rvp.z_##cntr = get_all_cpu_total(qibp->rvp.cntr); \
 483         else                                                            \
 484                 qib_dev_err(dd, "Per CPU cntrs can only be zeroed");    \
 485 }
 486
 487 def_write_per_cpu(rc_acks)
 488 def_write_per_cpu(rc_qacks)
 489 def_write_per_cpu(rc_delayed_comp)
 490
 491 #define READ_PER_CPU_CNTR(cntr) (get_all_cpu_total(qibp->rvp.cntr) - \
 492                                                         qibp->rvp.z_##cntr)
 493
 494 static ssize_t diagc_attr_show(struct kobject *kobj, struct attribute *attr,
 495                                char *buf)
 496 {
 497         struct qib_diagc_attr *dattr =
 498                 container_of(attr, struct qib_diagc_attr, attr);
 499         struct qib_pportdata *ppd =
 500                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 501         struct qib_ibport *qibp = &ppd->ibport_data;
 502
 503         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 504                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_acks));
 505         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 506                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_qacks));
 507         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 508                 return sprintf(buf, "%llu\n",
 509                                         READ_PER_CPU_CNTR(rc_delayed_comp));
 510         else
 511                 return sprintf(buf, "%u\n",
 512                                 *(u32 *)((char *)qibp + dattr->counter));
 513 }
 514
 515 static ssize_t diagc_attr_store(struct kobject *kobj, struct attribute *attr,
 516                                 const char *buf, size_t size)
 517 {
 518         struct qib_diagc_attr *dattr =
 519                 container_of(attr, struct qib_diagc_attr, attr);
 520         struct qib_pportdata *ppd =
 521                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 522         struct qib_ibport *qibp = &ppd->ibport_data;
 523         u32 val;
 524         int ret;
 525
 526         ret = kstrtou32(buf, 0, &val);
 527         if (ret)
 528                 return ret;
 529
 530         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 531                 write_per_cpu_rc_acks(ppd, val);
 532         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 533                 write_per_cpu_rc_qacks(ppd, val);
 534         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 535                 write_per_cpu_rc_delayed_comp(ppd, val);
 536         else
 537                 *(u32 *)((char *)qibp + dattr->counter) = val;
 538         return size;
 539 }
 540
 541 static const struct sysfs_ops qib_diagc_ops = {
 542         .show = diagc_attr_show,
 543         .store = diagc_attr_store,
 544 };
 545
 546 static struct kobj_type qib_diagc_ktype = {
 547         .release = qib_port_release,
 548         .sysfs_ops = &qib_diagc_ops,
 549         .default_attrs = diagc_default_attributes
 550 };
 551
 552 /* End diag_counters */
 553
 554 /* end of per-port file structures and support code */
 555
 556 /*
 557  * Start of per-unit (or driver, in some cases, but replicated
 558  * per unit) functions (these get a device *)
 559  */
 560 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 561                         char *buf)
 562 {
 563         struct qib_ibdev *dev =
 564                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 565
 566         return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
 567 }
 568
 569 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 570                         char *buf)
 571 {
 572         struct qib_ibdev *dev =
 573                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 574         struct qib_devdata *dd = dd_from_dev(dev);
 575         int ret;
 576
 577         if (!dd->boardname)
 578                 ret = -EINVAL;
 579         else
 580                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
 581         return ret;
 582 }
 583
 584 static ssize_t show_version(struct device *device,
 585                             struct device_attribute *attr, char *buf)
 586 {
 587         /* The string printed here is already newline-terminated. */
 588         return scnprintf(buf, PAGE_SIZE, "%s", (char *)ib_qib_version);
 589 }
 590
 591 static ssize_t show_boardversion(struct device *device,
 592                                  struct device_attribute *attr, char *buf)
 593 {
 594         struct qib_ibdev *dev =
 595                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 596         struct qib_devdata *dd = dd_from_dev(dev);
 597
 598         /* The string printed here is already newline-terminated. */
 599         return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
 600 }
 601
 602
 603 static ssize_t show_localbus_info(struct device *device,
 604                                   struct device_attribute *attr, char *buf)
 605 {
 606         struct qib_ibdev *dev =
 607                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 608         struct qib_devdata *dd = dd_from_dev(dev);
 609
 610         /* The string printed here is already newline-terminated. */
 611         return scnprintf(buf, PAGE_SIZE, "%s", dd->lbus_info);
 612 }
 613
 614
 615 static ssize_t show_nctxts(struct device *device,
 616                            struct device_attribute *attr, char *buf)
 617 {
 618         struct qib_ibdev *dev =
 619                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 620         struct qib_devdata *dd = dd_from_dev(dev);
 621
 622         /* Return the number of user ports (contexts) available. */
 623         /* The calculation below deals with a special case where
 624          * cfgctxts is set to 1 on a single-port board. */
 625         return scnprintf(buf, PAGE_SIZE, "%u\n",
 626                         (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
 627                         (dd->cfgctxts - dd->first_user_ctxt));
 628 }
 629
 630 static ssize_t show_nfreectxts(struct device *device,
 631                            struct device_attribute *attr, char *buf)
 632 {
 633         struct qib_ibdev *dev =
 634                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 635         struct qib_devdata *dd = dd_from_dev(dev);
 636
 637         /* Return the number of free user ports (contexts) available. */
 638         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
 639 }
 640
 641 static ssize_t show_serial(struct device *device,
 642                            struct device_attribute *attr, char *buf)
 643 {
 644         struct qib_ibdev *dev =
 645                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 646         struct qib_devdata *dd = dd_from_dev(dev);
 647
 648         buf[sizeof(dd->serial)] = '\0';
 649         memcpy(buf, dd->serial, sizeof(dd->serial));
 650         strcat(buf, "\n");
 651         return strlen(buf);
 652 }
 653
 654 static ssize_t store_chip_reset(struct device *device,
 655                                 struct device_attribute *attr, const char *buf,
 656                                 size_t count)
 657 {
 658         struct qib_ibdev *dev =
 659                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 660         struct qib_devdata *dd = dd_from_dev(dev);
 661         int ret;
 662
 663         if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
 664                 ret = -EINVAL;
 665                 goto bail;
 666         }
 667
 668         ret = qib_reset_device(dd->unit);
 669 bail:
 670         return ret < 0 ? ret : count;
 671 }
 672
 673 /*
 674  * Dump tempsense regs. in decimal, to ease shell-scripts.
 675  */
 676 static ssize_t show_tempsense(struct device *device,
 677                               struct device_attribute *attr, char *buf)
 678 {
 679         struct qib_ibdev *dev =
 680                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 681         struct qib_devdata *dd = dd_from_dev(dev);
 682         int ret;
 683         int idx;
 684         u8 regvals[8];
 685
 686         ret = -ENXIO;
 687         for (idx = 0; idx < 8; ++idx) {
 688                 if (idx == 6)
 689                         continue;
 690                 ret = dd->f_tempsense_rd(dd, idx);
 691                 if (ret < 0)
 692                         break;
 693                 regvals[idx] = ret;
 694         }
 695         if (idx == 8)
 696                 ret = scnprintf(buf, PAGE_SIZE, "%d %d %02X %02X %d %d\n",
 697                                 *(signed char *)(regvals),
 698                                 *(signed char *)(regvals + 1),
 699                                 regvals[2], regvals[3],
 700                                 *(signed char *)(regvals + 5),
 701                                 *(signed char *)(regvals + 7));
 702         return ret;
 703 }
 704
 705 /*
 706  * end of per-unit (or driver, in some cases, but replicated
 707  * per unit) functions
 708  */
 709
 710 /* start of per-unit file structures and support code */
 711 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 712 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
 713 static DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
 714 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
 715 static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
 716 static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
 717 static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
 718 static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
 719 static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
 720 static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
 721 static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);
 722
 723 static struct device_attribute *qib_attributes[] = {
 724         &dev_attr_hw_rev,
 725         &dev_attr_hca_type,
 726         &dev_attr_board_id,
 727         &dev_attr_version,
 728         &dev_attr_nctxts,
 729         &dev_attr_nfreectxts,
 730         &dev_attr_serial,
 731         &dev_attr_boardversion,
 732         &dev_attr_tempsense,
 733         &dev_attr_localbus_info,
 734         &dev_attr_chip_reset,
 735 };
 736
 737 int qib_create_port_files(struct ib_device *ibdev, u8 port_num,
 738                           struct kobject *kobj)
 739 {
 740         struct qib_pportdata *ppd;
 741         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 742         int ret;
 743
 744         if (!port_num || port_num > dd->num_pports) {
 745                 qib_dev_err(dd,
 746                         "Skipping infiniband class with invalid port %u\n",
 747                         port_num);
 748                 ret = -ENODEV;
 749                 goto bail;
 750         }
 751         ppd = &dd->pport[port_num - 1];
 752
 753         ret = kobject_init_and_add(&ppd->pport_kobj, &qib_port_ktype, kobj,
 754                                    "linkcontrol");
 755         if (ret) {
 756                 qib_dev_err(dd,
 757                         "Skipping linkcontrol sysfs info, (err %d) port %u\n",
 758                         ret, port_num);
 759                 goto bail_link;
 760         }
 761         kobject_uevent(&ppd->pport_kobj, KOBJ_ADD);
 762
 763         ret = kobject_init_and_add(&ppd->sl2vl_kobj, &qib_sl2vl_ktype, kobj,
 764                                    "sl2vl");
 765         if (ret) {
 766                 qib_dev_err(dd,
 767                         "Skipping sl2vl sysfs info, (err %d) port %u\n",
 768                         ret, port_num);
 769                 goto bail_sl;
 770         }
 771         kobject_uevent(&ppd->sl2vl_kobj, KOBJ_ADD);
 772
 773         ret = kobject_init_and_add(&ppd->diagc_kobj, &qib_diagc_ktype, kobj,
 774                                    "diag_counters");
 775         if (ret) {
 776                 qib_dev_err(dd,
 777                         "Skipping diag_counters sysfs info, (err %d) port %u\n",
 778                         ret, port_num);
 779                 goto bail_diagc;
 780         }
 781         kobject_uevent(&ppd->diagc_kobj, KOBJ_ADD);
 782
 783         if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
 784                 return 0;
 785
 786         ret = kobject_init_and_add(&ppd->pport_cc_kobj, &qib_port_cc_ktype,
 787                                 kobj, "CCMgtA");
 788         if (ret) {
 789                 qib_dev_err(dd,
 790                  "Skipping Congestion Control sysfs info, (err %d) port %u\n",
 791                  ret, port_num);
 792                 goto bail_cc;
 793         }
 794
 795         kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
 796
 797         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 798                                 &cc_setting_bin_attr);
 799         if (ret) {
 800                 qib_dev_err(dd,
 801                  "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
 802                  ret, port_num);
 803                 goto bail_cc;
 804         }
 805
 806         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 807                                 &cc_table_bin_attr);
 808         if (ret) {
 809                 qib_dev_err(dd,
 810                  "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
 811                  ret, port_num);
 812                 goto bail_cc_entry_bin;
 813         }
 814
 815         qib_devinfo(dd->pcidev,
 816                 "IB%u: Congestion Control Agent enabled for port %d\n",
 817                 dd->unit, port_num);
 818
 819         return 0;
 820
 821 bail_cc_entry_bin:
 822         sysfs_remove_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
 823 bail_cc:
 824         kobject_put(&ppd->pport_cc_kobj);
 825 bail_diagc:
 826         kobject_put(&ppd->diagc_kobj);
 827 bail_sl:
 828         kobject_put(&ppd->sl2vl_kobj);
 829 bail_link:
 830         kobject_put(&ppd->pport_kobj);
 831 bail:
 832         return ret;
 833 }
 834
 835 /*
 836  * Register and create our files in /sys/class/infiniband.
 837  */
 838 int qib_verbs_register_sysfs(struct qib_devdata *dd)
 839 {
 840         struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
 841         int i, ret;
 842
 843         for (i = 0; i < ARRAY_SIZE(qib_attributes); ++i) {
 844                 ret = device_create_file(&dev->dev, qib_attributes[i]);
 845                 if (ret)
 846                         goto bail;
 847         }
 848
 849         return 0;
 850 bail:
 851         for (i = 0; i < ARRAY_SIZE(qib_attributes); ++i)
 852                 device_remove_file(&dev->dev, qib_attributes[i]);
 853         return ret;
 854 }
 855
 856 /*
 857  * Unregister and remove our files in /sys/class/infiniband.
 858  */
 859 void qib_verbs_unregister_sysfs(struct qib_devdata *dd)
 860 {
 861         struct qib_pportdata *ppd;
 862         int i;
 863
 864         for (i = 0; i < dd->num_pports; i++) {
 865                 ppd = &dd->pport[i];
 866                 if (qib_cc_table_size &&
 867                         ppd->congestion_entries_shadow) {
 868                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 869                                 &cc_setting_bin_attr);
 870                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 871                                 &cc_table_bin_attr);
 872                         kobject_put(&ppd->pport_cc_kobj);
 873                 }
 874                 kobject_put(&ppd->diagc_kobj);
 875                 kobject_put(&ppd->sl2vl_kobj);
 876                 kobject_put(&ppd->pport_kobj);
 877         }
 878 }