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         return pattr->show(ppd, buf);
 305 }
 306
 307 static ssize_t qib_portattr_store(struct kobject *kobj,
 308         struct attribute *attr, const char *buf, size_t len)
 309 {
 310         struct qib_port_attr *pattr =
 311                 container_of(attr, struct qib_port_attr, attr);
 312         struct qib_pportdata *ppd =
 313                 container_of(kobj, struct qib_pportdata, pport_kobj);
 314
 315         return pattr->store(ppd, buf, len);
 316 }
 317
 318
 319 static const struct sysfs_ops qib_port_ops = {
 320         .show = qib_portattr_show,
 321         .store = qib_portattr_store,
 322 };
 323
 324 static struct kobj_type qib_port_ktype = {
 325         .release = qib_port_release,
 326         .sysfs_ops = &qib_port_ops,
 327         .default_attrs = port_default_attributes
 328 };
 329
 330 /* Start sl2vl */
 331
 332 #define QIB_SL2VL_ATTR(N) \
 333         static struct qib_sl2vl_attr qib_sl2vl_attr_##N = { \
 334                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 335                 .sl = N \
 336         }
 337
 338 struct qib_sl2vl_attr {
 339         struct attribute attr;
 340         int sl;
 341 };
 342
 343 QIB_SL2VL_ATTR(0);
 344 QIB_SL2VL_ATTR(1);
 345 QIB_SL2VL_ATTR(2);
 346 QIB_SL2VL_ATTR(3);
 347 QIB_SL2VL_ATTR(4);
 348 QIB_SL2VL_ATTR(5);
 349 QIB_SL2VL_ATTR(6);
 350 QIB_SL2VL_ATTR(7);
 351 QIB_SL2VL_ATTR(8);
 352 QIB_SL2VL_ATTR(9);
 353 QIB_SL2VL_ATTR(10);
 354 QIB_SL2VL_ATTR(11);
 355 QIB_SL2VL_ATTR(12);
 356 QIB_SL2VL_ATTR(13);
 357 QIB_SL2VL_ATTR(14);
 358 QIB_SL2VL_ATTR(15);
 359
 360 static struct attribute *sl2vl_default_attributes[] = {
 361         &qib_sl2vl_attr_0.attr,
 362         &qib_sl2vl_attr_1.attr,
 363         &qib_sl2vl_attr_2.attr,
 364         &qib_sl2vl_attr_3.attr,
 365         &qib_sl2vl_attr_4.attr,
 366         &qib_sl2vl_attr_5.attr,
 367         &qib_sl2vl_attr_6.attr,
 368         &qib_sl2vl_attr_7.attr,
 369         &qib_sl2vl_attr_8.attr,
 370         &qib_sl2vl_attr_9.attr,
 371         &qib_sl2vl_attr_10.attr,
 372         &qib_sl2vl_attr_11.attr,
 373         &qib_sl2vl_attr_12.attr,
 374         &qib_sl2vl_attr_13.attr,
 375         &qib_sl2vl_attr_14.attr,
 376         &qib_sl2vl_attr_15.attr,
 377         NULL
 378 };
 379
 380 static ssize_t sl2vl_attr_show(struct kobject *kobj, struct attribute *attr,
 381                                char *buf)
 382 {
 383         struct qib_sl2vl_attr *sattr =
 384                 container_of(attr, struct qib_sl2vl_attr, attr);
 385         struct qib_pportdata *ppd =
 386                 container_of(kobj, struct qib_pportdata, sl2vl_kobj);
 387         struct qib_ibport *qibp = &ppd->ibport_data;
 388
 389         return sprintf(buf, "%u\n", qibp->sl_to_vl[sattr->sl]);
 390 }
 391
 392 static const struct sysfs_ops qib_sl2vl_ops = {
 393         .show = sl2vl_attr_show,
 394 };
 395
 396 static struct kobj_type qib_sl2vl_ktype = {
 397         .release = qib_port_release,
 398         .sysfs_ops = &qib_sl2vl_ops,
 399         .default_attrs = sl2vl_default_attributes
 400 };
 401
 402 /* End sl2vl */
 403
 404 /* Start diag_counters */
 405
 406 #define QIB_DIAGC_ATTR(N) \
 407         static struct qib_diagc_attr qib_diagc_attr_##N = { \
 408                 .attr = { .name = __stringify(N), .mode = 0664 }, \
 409                 .counter = offsetof(struct qib_ibport, rvp.n_##N) \
 410         }
 411
 412 #define QIB_DIAGC_ATTR_PER_CPU(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.z_##N) \
 416         }
 417
 418 struct qib_diagc_attr {
 419         struct attribute attr;
 420         size_t counter;
 421 };
 422
 423 QIB_DIAGC_ATTR_PER_CPU(rc_acks);
 424 QIB_DIAGC_ATTR_PER_CPU(rc_qacks);
 425 QIB_DIAGC_ATTR_PER_CPU(rc_delayed_comp);
 426
 427 QIB_DIAGC_ATTR(rc_resends);
 428 QIB_DIAGC_ATTR(seq_naks);
 429 QIB_DIAGC_ATTR(rdma_seq);
 430 QIB_DIAGC_ATTR(rnr_naks);
 431 QIB_DIAGC_ATTR(other_naks);
 432 QIB_DIAGC_ATTR(rc_timeouts);
 433 QIB_DIAGC_ATTR(loop_pkts);
 434 QIB_DIAGC_ATTR(pkt_drops);
 435 QIB_DIAGC_ATTR(dmawait);
 436 QIB_DIAGC_ATTR(unaligned);
 437 QIB_DIAGC_ATTR(rc_dupreq);
 438 QIB_DIAGC_ATTR(rc_seqnak);
 439
 440 static struct attribute *diagc_default_attributes[] = {
 441         &qib_diagc_attr_rc_resends.attr,
 442         &qib_diagc_attr_rc_acks.attr,
 443         &qib_diagc_attr_rc_qacks.attr,
 444         &qib_diagc_attr_rc_delayed_comp.attr,
 445         &qib_diagc_attr_seq_naks.attr,
 446         &qib_diagc_attr_rdma_seq.attr,
 447         &qib_diagc_attr_rnr_naks.attr,
 448         &qib_diagc_attr_other_naks.attr,
 449         &qib_diagc_attr_rc_timeouts.attr,
 450         &qib_diagc_attr_loop_pkts.attr,
 451         &qib_diagc_attr_pkt_drops.attr,
 452         &qib_diagc_attr_dmawait.attr,
 453         &qib_diagc_attr_unaligned.attr,
 454         &qib_diagc_attr_rc_dupreq.attr,
 455         &qib_diagc_attr_rc_seqnak.attr,
 456         NULL
 457 };
 458
 459 static u64 get_all_cpu_total(u64 __percpu *cntr)
 460 {
 461         int cpu;
 462         u64 counter = 0;
 463
 464         for_each_possible_cpu(cpu)
 465                 counter += *per_cpu_ptr(cntr, cpu);
 466         return counter;
 467 }
 468
 469 #define def_write_per_cpu(cntr) \
 470 static void write_per_cpu_##cntr(struct qib_pportdata *ppd, u32 data)   \
 471 {                                                                       \
 472         struct qib_devdata *dd = ppd->dd;                               \
 473         struct qib_ibport *qibp = &ppd->ibport_data;                    \
 474         /*  A write can only zero the counter */                        \
 475         if (data == 0)                                                  \
 476                 qibp->rvp.z_##cntr = get_all_cpu_total(qibp->rvp.cntr); \
 477         else                                                            \
 478                 qib_dev_err(dd, "Per CPU cntrs can only be zeroed");    \
 479 }
 480
 481 def_write_per_cpu(rc_acks)
 482 def_write_per_cpu(rc_qacks)
 483 def_write_per_cpu(rc_delayed_comp)
 484
 485 #define READ_PER_CPU_CNTR(cntr) (get_all_cpu_total(qibp->rvp.cntr) - \
 486                                                         qibp->rvp.z_##cntr)
 487
 488 static ssize_t diagc_attr_show(struct kobject *kobj, struct attribute *attr,
 489                                char *buf)
 490 {
 491         struct qib_diagc_attr *dattr =
 492                 container_of(attr, struct qib_diagc_attr, attr);
 493         struct qib_pportdata *ppd =
 494                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 495         struct qib_ibport *qibp = &ppd->ibport_data;
 496
 497         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 498                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_acks));
 499         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 500                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_qacks));
 501         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 502                 return sprintf(buf, "%llu\n",
 503                                         READ_PER_CPU_CNTR(rc_delayed_comp));
 504         else
 505                 return sprintf(buf, "%u\n",
 506                                 *(u32 *)((char *)qibp + dattr->counter));
 507 }
 508
 509 static ssize_t diagc_attr_store(struct kobject *kobj, struct attribute *attr,
 510                                 const char *buf, size_t size)
 511 {
 512         struct qib_diagc_attr *dattr =
 513                 container_of(attr, struct qib_diagc_attr, attr);
 514         struct qib_pportdata *ppd =
 515                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 516         struct qib_ibport *qibp = &ppd->ibport_data;
 517         u32 val;
 518         int ret;
 519
 520         ret = kstrtou32(buf, 0, &val);
 521         if (ret)
 522                 return ret;
 523
 524         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 525                 write_per_cpu_rc_acks(ppd, val);
 526         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 527                 write_per_cpu_rc_qacks(ppd, val);
 528         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 529                 write_per_cpu_rc_delayed_comp(ppd, val);
 530         else
 531                 *(u32 *)((char *)qibp + dattr->counter) = val;
 532         return size;
 533 }
 534
 535 static const struct sysfs_ops qib_diagc_ops = {
 536         .show = diagc_attr_show,
 537         .store = diagc_attr_store,
 538 };
 539
 540 static struct kobj_type qib_diagc_ktype = {
 541         .release = qib_port_release,
 542         .sysfs_ops = &qib_diagc_ops,
 543         .default_attrs = diagc_default_attributes
 544 };
 545
 546 /* End diag_counters */
 547
 548 /* end of per-port file structures and support code */
 549
 550 /*
 551  * Start of per-unit (or driver, in some cases, but replicated
 552  * per unit) functions (these get a device *)
 553  */
 554 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 555                         char *buf)
 556 {
 557         struct qib_ibdev *dev =
 558                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 559
 560         return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
 561 }
 562
 563 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
 564                         char *buf)
 565 {
 566         struct qib_ibdev *dev =
 567                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 568         struct qib_devdata *dd = dd_from_dev(dev);
 569         int ret;
 570
 571         if (!dd->boardname)
 572                 ret = -EINVAL;
 573         else
 574                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
 575         return ret;
 576 }
 577
 578 static ssize_t show_version(struct device *device,
 579                             struct device_attribute *attr, char *buf)
 580 {
 581         /* The string printed here is already newline-terminated. */
 582         return scnprintf(buf, PAGE_SIZE, "%s", (char *)ib_qib_version);
 583 }
 584
 585 static ssize_t show_boardversion(struct device *device,
 586                                  struct device_attribute *attr, char *buf)
 587 {
 588         struct qib_ibdev *dev =
 589                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 590         struct qib_devdata *dd = dd_from_dev(dev);
 591
 592         /* The string printed here is already newline-terminated. */
 593         return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
 594 }
 595
 596
 597 static ssize_t show_localbus_info(struct device *device,
 598                                   struct device_attribute *attr, char *buf)
 599 {
 600         struct qib_ibdev *dev =
 601                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 602         struct qib_devdata *dd = dd_from_dev(dev);
 603
 604         /* The string printed here is already newline-terminated. */
 605         return scnprintf(buf, PAGE_SIZE, "%s", dd->lbus_info);
 606 }
 607
 608
 609 static ssize_t show_nctxts(struct device *device,
 610                            struct device_attribute *attr, char *buf)
 611 {
 612         struct qib_ibdev *dev =
 613                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 614         struct qib_devdata *dd = dd_from_dev(dev);
 615
 616         /* Return the number of user ports (contexts) available. */
 617         /* The calculation below deals with a special case where
 618          * cfgctxts is set to 1 on a single-port board. */
 619         return scnprintf(buf, PAGE_SIZE, "%u\n",
 620                         (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
 621                         (dd->cfgctxts - dd->first_user_ctxt));
 622 }
 623
 624 static ssize_t show_nfreectxts(struct device *device,
 625                            struct device_attribute *attr, char *buf)
 626 {
 627         struct qib_ibdev *dev =
 628                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 629         struct qib_devdata *dd = dd_from_dev(dev);
 630
 631         /* Return the number of free user ports (contexts) available. */
 632         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
 633 }
 634
 635 static ssize_t show_serial(struct device *device,
 636                            struct device_attribute *attr, char *buf)
 637 {
 638         struct qib_ibdev *dev =
 639                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 640         struct qib_devdata *dd = dd_from_dev(dev);
 641
 642         buf[sizeof(dd->serial)] = '\0';
 643         memcpy(buf, dd->serial, sizeof(dd->serial));
 644         strcat(buf, "\n");
 645         return strlen(buf);
 646 }
 647
 648 static ssize_t store_chip_reset(struct device *device,
 649                                 struct device_attribute *attr, const char *buf,
 650                                 size_t count)
 651 {
 652         struct qib_ibdev *dev =
 653                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 654         struct qib_devdata *dd = dd_from_dev(dev);
 655         int ret;
 656
 657         if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
 658                 ret = -EINVAL;
 659                 goto bail;
 660         }
 661
 662         ret = qib_reset_device(dd->unit);
 663 bail:
 664         return ret < 0 ? ret : count;
 665 }
 666
 667 /*
 668  * Dump tempsense regs. in decimal, to ease shell-scripts.
 669  */
 670 static ssize_t show_tempsense(struct device *device,
 671                               struct device_attribute *attr, char *buf)
 672 {
 673         struct qib_ibdev *dev =
 674                 container_of(device, struct qib_ibdev, rdi.ibdev.dev);
 675         struct qib_devdata *dd = dd_from_dev(dev);
 676         int ret;
 677         int idx;
 678         u8 regvals[8];
 679
 680         ret = -ENXIO;
 681         for (idx = 0; idx < 8; ++idx) {
 682                 if (idx == 6)
 683                         continue;
 684                 ret = dd->f_tempsense_rd(dd, idx);
 685                 if (ret < 0)
 686                         break;
 687                 regvals[idx] = ret;
 688         }
 689         if (idx == 8)
 690                 ret = scnprintf(buf, PAGE_SIZE, "%d %d %02X %02X %d %d\n",
 691                                 *(signed char *)(regvals),
 692                                 *(signed char *)(regvals + 1),
 693                                 regvals[2], regvals[3],
 694                                 *(signed char *)(regvals + 5),
 695                                 *(signed char *)(regvals + 7));
 696         return ret;
 697 }
 698
 699 /*
 700  * end of per-unit (or driver, in some cases, but replicated
 701  * per unit) functions
 702  */
 703
 704 /* start of per-unit file structures and support code */
 705 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 706 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
 707 static DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
 708 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
 709 static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
 710 static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
 711 static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
 712 static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
 713 static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
 714 static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
 715 static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);
 716
 717 static struct device_attribute *qib_attributes[] = {
 718         &dev_attr_hw_rev,
 719         &dev_attr_hca_type,
 720         &dev_attr_board_id,
 721         &dev_attr_version,
 722         &dev_attr_nctxts,
 723         &dev_attr_nfreectxts,
 724         &dev_attr_serial,
 725         &dev_attr_boardversion,
 726         &dev_attr_tempsense,
 727         &dev_attr_localbus_info,
 728         &dev_attr_chip_reset,
 729 };
 730
 731 int qib_create_port_files(struct ib_device *ibdev, u8 port_num,
 732                           struct kobject *kobj)
 733 {
 734         struct qib_pportdata *ppd;
 735         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 736         int ret;
 737
 738         if (!port_num || port_num > dd->num_pports) {
 739                 qib_dev_err(dd,
 740                         "Skipping infiniband class with invalid port %u\n",
 741                         port_num);
 742                 ret = -ENODEV;
 743                 goto bail;
 744         }
 745         ppd = &dd->pport[port_num - 1];
 746
 747         ret = kobject_init_and_add(&ppd->pport_kobj, &qib_port_ktype, kobj,
 748                                    "linkcontrol");
 749         if (ret) {
 750                 qib_dev_err(dd,
 751                         "Skipping linkcontrol sysfs info, (err %d) port %u\n",
 752                         ret, port_num);
 753                 goto bail;
 754         }
 755         kobject_uevent(&ppd->pport_kobj, KOBJ_ADD);
 756
 757         ret = kobject_init_and_add(&ppd->sl2vl_kobj, &qib_sl2vl_ktype, kobj,
 758                                    "sl2vl");
 759         if (ret) {
 760                 qib_dev_err(dd,
 761                         "Skipping sl2vl sysfs info, (err %d) port %u\n",
 762                         ret, port_num);
 763                 goto bail_link;
 764         }
 765         kobject_uevent(&ppd->sl2vl_kobj, KOBJ_ADD);
 766
 767         ret = kobject_init_and_add(&ppd->diagc_kobj, &qib_diagc_ktype, kobj,
 768                                    "diag_counters");
 769         if (ret) {
 770                 qib_dev_err(dd,
 771                         "Skipping diag_counters sysfs info, (err %d) port %u\n",
 772                         ret, port_num);
 773                 goto bail_sl;
 774         }
 775         kobject_uevent(&ppd->diagc_kobj, KOBJ_ADD);
 776
 777         if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
 778                 return 0;
 779
 780         ret = kobject_init_and_add(&ppd->pport_cc_kobj, &qib_port_cc_ktype,
 781                                 kobj, "CCMgtA");
 782         if (ret) {
 783                 qib_dev_err(dd,
 784                  "Skipping Congestion Control sysfs info, (err %d) port %u\n",
 785                  ret, port_num);
 786                 goto bail_diagc;
 787         }
 788
 789         kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
 790
 791         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 792                                 &cc_setting_bin_attr);
 793         if (ret) {
 794                 qib_dev_err(dd,
 795                  "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
 796                  ret, port_num);
 797                 goto bail_cc;
 798         }
 799
 800         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 801                                 &cc_table_bin_attr);
 802         if (ret) {
 803                 qib_dev_err(dd,
 804                  "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
 805                  ret, port_num);
 806                 goto bail_cc_entry_bin;
 807         }
 808
 809         qib_devinfo(dd->pcidev,
 810                 "IB%u: Congestion Control Agent enabled for port %d\n",
 811                 dd->unit, port_num);
 812
 813         return 0;
 814
 815 bail_cc_entry_bin:
 816         sysfs_remove_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
 817 bail_cc:
 818         kobject_put(&ppd->pport_cc_kobj);
 819 bail_diagc:
 820         kobject_put(&ppd->diagc_kobj);
 821 bail_sl:
 822         kobject_put(&ppd->sl2vl_kobj);
 823 bail_link:
 824         kobject_put(&ppd->pport_kobj);
 825 bail:
 826         return ret;
 827 }
 828
 829 /*
 830  * Register and create our files in /sys/class/infiniband.
 831  */
 832 int qib_verbs_register_sysfs(struct qib_devdata *dd)
 833 {
 834         struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
 835         int i, ret;
 836
 837         for (i = 0; i < ARRAY_SIZE(qib_attributes); ++i) {
 838                 ret = device_create_file(&dev->dev, qib_attributes[i]);
 839                 if (ret)
 840                         goto bail;
 841         }
 842
 843         return 0;
 844 bail:
 845         for (i = 0; i < ARRAY_SIZE(qib_attributes); ++i)
 846                 device_remove_file(&dev->dev, qib_attributes[i]);
 847         return ret;
 848 }
 849
 850 /*
 851  * Unregister and remove our files in /sys/class/infiniband.
 852  */
 853 void qib_verbs_unregister_sysfs(struct qib_devdata *dd)
 854 {
 855         struct qib_pportdata *ppd;
 856         int i;
 857
 858         for (i = 0; i < dd->num_pports; i++) {
 859                 ppd = &dd->pport[i];
 860                 if (qib_cc_table_size &&
 861                         ppd->congestion_entries_shadow) {
 862                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 863                                 &cc_setting_bin_attr);
 864                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 865                                 &cc_table_bin_attr);
 866                         kobject_put(&ppd->pport_cc_kobj);
 867                 }
 868                 kobject_put(&ppd->sl2vl_kobj);
 869                 kobject_put(&ppd->pport_kobj);
 870         }
 871 }