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
  47         return sysfs_emit(buf, "%d\n", dd->f_get_ib_cfg(ppd, QIB_IB_CFG_HRTBT));
  48 }
  49
  50 static ssize_t store_hrtbt_enb(struct qib_pportdata *ppd, const char *buf,
  51                                size_t count)
  52 {
  53         struct qib_devdata *dd = ppd->dd;
  54         int ret;
  55         u16 val;
  56
  57         ret = kstrtou16(buf, 0, &val);
  58         if (ret) {
  59                 qib_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
  60                 return ret;
  61         }
  62
  63         /*
  64          * Set the "intentional" heartbeat enable per either of
  65          * "Enable" and "Auto", as these are normally set together.
  66          * This bit is consulted when leaving loopback mode,
  67          * because entering loopback mode overrides it and automatically
  68          * disables heartbeat.
  69          */
  70         ret = dd->f_set_ib_cfg(ppd, QIB_IB_CFG_HRTBT, val);
  71         return ret < 0 ? ret : count;
  72 }
  73
  74 static ssize_t store_loopback(struct qib_pportdata *ppd, const char *buf,
  75                               size_t count)
  76 {
  77         struct qib_devdata *dd = ppd->dd;
  78         int ret = count, r;
  79
  80         r = dd->f_set_ib_loopback(ppd, buf);
  81         if (r < 0)
  82                 ret = r;
  83
  84         return ret;
  85 }
  86
  87 static ssize_t store_led_override(struct qib_pportdata *ppd, const char *buf,
  88                                   size_t count)
  89 {
  90         struct qib_devdata *dd = ppd->dd;
  91         int ret;
  92         u16 val;
  93
  94         ret = kstrtou16(buf, 0, &val);
  95         if (ret) {
  96                 qib_dev_err(dd, "attempt to set invalid LED override\n");
  97                 return ret;
  98         }
  99
 100         qib_set_led_override(ppd, val);
 101         return count;
 102 }
 103
 104 static ssize_t show_status(struct qib_pportdata *ppd, char *buf)
 105 {
 106         if (!ppd->statusp)
 107                 return -EINVAL;
 108
 109         return sysfs_emit(buf, "0x%llx\n", (unsigned long long)*(ppd->statusp));
 110 }
 111
 112 /*
 113  * For userland compatibility, these offsets must remain fixed.
 114  * They are strings for QIB_STATUS_*
 115  */
 116 static const char * const qib_status_str[] = {
 117         "Initted",
 118         "",
 119         "",
 120         "",
 121         "",
 122         "Present",
 123         "IB_link_up",
 124         "IB_configured",
 125         "",
 126         "Fatal_Hardware_Error",
 127         NULL,
 128 };
 129
 130 static ssize_t show_status_str(struct qib_pportdata *ppd, char *buf)
 131 {
 132         int i, any;
 133         u64 s;
 134         ssize_t ret;
 135
 136         if (!ppd->statusp) {
 137                 ret = -EINVAL;
 138                 goto bail;
 139         }
 140
 141         s = *(ppd->statusp);
 142         *buf = '\0';
 143         for (any = i = 0; s && qib_status_str[i]; i++) {
 144                 if (s & 1) {
 145                         /* if overflow */
 146                         if (any && strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
 147                                 break;
 148                         if (strlcat(buf, qib_status_str[i], PAGE_SIZE) >=
 149                                         PAGE_SIZE)
 150                                 break;
 151                         any = 1;
 152                 }
 153                 s >>= 1;
 154         }
 155         if (any)
 156                 strlcat(buf, "\n", PAGE_SIZE);
 157
 158         ret = strlen(buf);
 159
 160 bail:
 161         return ret;
 162 }
 163
 164 /* end of per-port functions */
 165
 166 /*
 167  * Start of per-port file structures and support code
 168  * Because we are fitting into other infrastructure, we have to supply the
 169  * full set of kobject/sysfs_ops structures and routines.
 170  */
 171 #define QIB_PORT_ATTR(name, mode, show, store) \
 172         static struct qib_port_attr qib_port_attr_##name = \
 173                 __ATTR(name, mode, show, store)
 174
 175 struct qib_port_attr {
 176         struct attribute attr;
 177         ssize_t (*show)(struct qib_pportdata *, char *);
 178         ssize_t (*store)(struct qib_pportdata *, const char *, size_t);
 179 };
 180
 181 QIB_PORT_ATTR(loopback, S_IWUSR, NULL, store_loopback);
 182 QIB_PORT_ATTR(led_override, S_IWUSR, NULL, store_led_override);
 183 QIB_PORT_ATTR(hrtbt_enable, S_IWUSR | S_IRUGO, show_hrtbt_enb,
 184               store_hrtbt_enb);
 185 QIB_PORT_ATTR(status, S_IRUGO, show_status, NULL);
 186 QIB_PORT_ATTR(status_str, S_IRUGO, show_status_str, NULL);
 187
 188 static struct attribute *port_default_attributes[] = {
 189         &qib_port_attr_loopback.attr,
 190         &qib_port_attr_led_override.attr,
 191         &qib_port_attr_hrtbt_enable.attr,
 192         &qib_port_attr_status.attr,
 193         &qib_port_attr_status_str.attr,
 194         NULL
 195 };
 196
 197 /*
 198  * Start of per-port congestion control structures and support code
 199  */
 200
 201 /*
 202  * Congestion control table size followed by table entries
 203  */
 204 static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
 205                 struct bin_attribute *bin_attr,
 206                 char *buf, loff_t pos, size_t count)
 207 {
 208         int ret;
 209         struct qib_pportdata *ppd =
 210                 container_of(kobj, struct qib_pportdata, pport_cc_kobj);
 211
 212         if (!qib_cc_table_size || !ppd->ccti_entries_shadow)
 213                 return -EINVAL;
 214
 215         ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
 216                  + sizeof(__be16);
 217
 218         if (pos > ret)
 219                 return -EINVAL;
 220
 221         if (count > ret - pos)
 222                 count = ret - pos;
 223
 224         if (!count)
 225                 return count;
 226
 227         spin_lock(&ppd->cc_shadow_lock);
 228         memcpy(buf, ppd->ccti_entries_shadow, count);
 229         spin_unlock(&ppd->cc_shadow_lock);
 230
 231         return count;
 232 }
 233
 234 static void qib_port_release(struct kobject *kobj)
 235 {
 236         /* nothing to do since memory is freed by qib_free_devdata() */
 237 }
 238
 239 static struct kobj_type qib_port_cc_ktype = {
 240         .release = qib_port_release,
 241 };
 242
 243 static const struct bin_attribute cc_table_bin_attr = {
 244         .attr = {.name = "cc_table_bin", .mode = 0444},
 245         .read = read_cc_table_bin,
 246         .size = PAGE_SIZE,
 247 };
 248
 249 /*
 250  * Congestion settings: port control, control map and an array of 16
 251  * entries for the congestion entries - increase, timer, event log
 252  * trigger threshold and the minimum injection rate delay.
 253  */
 254 static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
 255                 struct bin_attribute *bin_attr,
 256                 char *buf, loff_t pos, size_t count)
 257 {
 258         int ret;
 259         struct qib_pportdata *ppd =
 260                 container_of(kobj, struct qib_pportdata, pport_cc_kobj);
 261
 262         if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
 263                 return -EINVAL;
 264
 265         ret = sizeof(struct ib_cc_congestion_setting_attr_shadow);
 266
 267         if (pos > ret)
 268                 return -EINVAL;
 269         if (count > ret - pos)
 270                 count = ret - pos;
 271
 272         if (!count)
 273                 return count;
 274
 275         spin_lock(&ppd->cc_shadow_lock);
 276         memcpy(buf, ppd->congestion_entries_shadow, count);
 277         spin_unlock(&ppd->cc_shadow_lock);
 278
 279         return count;
 280 }
 281
 282 static const struct bin_attribute cc_setting_bin_attr = {
 283         .attr = {.name = "cc_settings_bin", .mode = 0444},
 284         .read = read_cc_setting_bin,
 285         .size = PAGE_SIZE,
 286 };
 287
 288
 289 static ssize_t qib_portattr_show(struct kobject *kobj,
 290         struct attribute *attr, char *buf)
 291 {
 292         struct qib_port_attr *pattr =
 293                 container_of(attr, struct qib_port_attr, attr);
 294         struct qib_pportdata *ppd =
 295                 container_of(kobj, struct qib_pportdata, pport_kobj);
 296
 297         if (!pattr->show)
 298                 return -EIO;
 299
 300         return pattr->show(ppd, buf);
 301 }
 302
 303 static ssize_t qib_portattr_store(struct kobject *kobj,
 304         struct attribute *attr, const char *buf, size_t len)
 305 {
 306         struct qib_port_attr *pattr =
 307                 container_of(attr, struct qib_port_attr, attr);
 308         struct qib_pportdata *ppd =
 309                 container_of(kobj, struct qib_pportdata, pport_kobj);
 310
 311         if (!pattr->store)
 312                 return -EIO;
 313
 314         return pattr->store(ppd, buf, len);
 315 }
 316
 317
 318 static const struct sysfs_ops qib_port_ops = {
 319         .show = qib_portattr_show,
 320         .store = qib_portattr_store,
 321 };
 322
 323 static struct kobj_type qib_port_ktype = {
 324         .release = qib_port_release,
 325         .sysfs_ops = &qib_port_ops,
 326         .default_attrs = port_default_attributes
 327 };
 328
 329 /* Start sl2vl */
 330
 331 #define QIB_SL2VL_ATTR(N) \
 332         static struct qib_sl2vl_attr qib_sl2vl_attr_##N = { \
 333                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 334                 .sl = N \
 335         }
 336
 337 struct qib_sl2vl_attr {
 338         struct attribute attr;
 339         int sl;
 340 };
 341
 342 QIB_SL2VL_ATTR(0);
 343 QIB_SL2VL_ATTR(1);
 344 QIB_SL2VL_ATTR(2);
 345 QIB_SL2VL_ATTR(3);
 346 QIB_SL2VL_ATTR(4);
 347 QIB_SL2VL_ATTR(5);
 348 QIB_SL2VL_ATTR(6);
 349 QIB_SL2VL_ATTR(7);
 350 QIB_SL2VL_ATTR(8);
 351 QIB_SL2VL_ATTR(9);
 352 QIB_SL2VL_ATTR(10);
 353 QIB_SL2VL_ATTR(11);
 354 QIB_SL2VL_ATTR(12);
 355 QIB_SL2VL_ATTR(13);
 356 QIB_SL2VL_ATTR(14);
 357 QIB_SL2VL_ATTR(15);
 358
 359 static struct attribute *sl2vl_default_attributes[] = {
 360         &qib_sl2vl_attr_0.attr,
 361         &qib_sl2vl_attr_1.attr,
 362         &qib_sl2vl_attr_2.attr,
 363         &qib_sl2vl_attr_3.attr,
 364         &qib_sl2vl_attr_4.attr,
 365         &qib_sl2vl_attr_5.attr,
 366         &qib_sl2vl_attr_6.attr,
 367         &qib_sl2vl_attr_7.attr,
 368         &qib_sl2vl_attr_8.attr,
 369         &qib_sl2vl_attr_9.attr,
 370         &qib_sl2vl_attr_10.attr,
 371         &qib_sl2vl_attr_11.attr,
 372         &qib_sl2vl_attr_12.attr,
 373         &qib_sl2vl_attr_13.attr,
 374         &qib_sl2vl_attr_14.attr,
 375         &qib_sl2vl_attr_15.attr,
 376         NULL
 377 };
 378
 379 static ssize_t sl2vl_attr_show(struct kobject *kobj, struct attribute *attr,
 380                                char *buf)
 381 {
 382         struct qib_sl2vl_attr *sattr =
 383                 container_of(attr, struct qib_sl2vl_attr, attr);
 384         struct qib_pportdata *ppd =
 385                 container_of(kobj, struct qib_pportdata, sl2vl_kobj);
 386         struct qib_ibport *qibp = &ppd->ibport_data;
 387
 388         return sysfs_emit(buf, "%u\n", qibp->sl_to_vl[sattr->sl]);
 389 }
 390
 391 static const struct sysfs_ops qib_sl2vl_ops = {
 392         .show = sl2vl_attr_show,
 393 };
 394
 395 static struct kobj_type qib_sl2vl_ktype = {
 396         .release = qib_port_release,
 397         .sysfs_ops = &qib_sl2vl_ops,
 398         .default_attrs = sl2vl_default_attributes
 399 };
 400
 401 /* End sl2vl */
 402
 403 /* Start diag_counters */
 404
 405 #define QIB_DIAGC_ATTR(N) \
 406         static struct qib_diagc_attr qib_diagc_attr_##N = { \
 407                 .attr = { .name = __stringify(N), .mode = 0664 }, \
 408                 .counter = offsetof(struct qib_ibport, rvp.n_##N) \
 409         }
 410
 411 #define QIB_DIAGC_ATTR_PER_CPU(N) \
 412         static struct qib_diagc_attr qib_diagc_attr_##N = { \
 413                 .attr = { .name = __stringify(N), .mode = 0664 }, \
 414                 .counter = offsetof(struct qib_ibport, rvp.z_##N) \
 415         }
 416
 417 struct qib_diagc_attr {
 418         struct attribute attr;
 419         size_t counter;
 420 };
 421
 422 QIB_DIAGC_ATTR_PER_CPU(rc_acks);
 423 QIB_DIAGC_ATTR_PER_CPU(rc_qacks);
 424 QIB_DIAGC_ATTR_PER_CPU(rc_delayed_comp);
 425
 426 QIB_DIAGC_ATTR(rc_resends);
 427 QIB_DIAGC_ATTR(seq_naks);
 428 QIB_DIAGC_ATTR(rdma_seq);
 429 QIB_DIAGC_ATTR(rnr_naks);
 430 QIB_DIAGC_ATTR(other_naks);
 431 QIB_DIAGC_ATTR(rc_timeouts);
 432 QIB_DIAGC_ATTR(loop_pkts);
 433 QIB_DIAGC_ATTR(pkt_drops);
 434 QIB_DIAGC_ATTR(dmawait);
 435 QIB_DIAGC_ATTR(unaligned);
 436 QIB_DIAGC_ATTR(rc_dupreq);
 437 QIB_DIAGC_ATTR(rc_seqnak);
 438 QIB_DIAGC_ATTR(rc_crwaits);
 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         &qib_diagc_attr_rc_crwaits.attr,
 457         NULL
 458 };
 459
 460 static u64 get_all_cpu_total(u64 __percpu *cntr)
 461 {
 462         int cpu;
 463         u64 counter = 0;
 464
 465         for_each_possible_cpu(cpu)
 466                 counter += *per_cpu_ptr(cntr, cpu);
 467         return counter;
 468 }
 469
 470 #define def_write_per_cpu(cntr) \
 471 static void write_per_cpu_##cntr(struct qib_pportdata *ppd, u32 data)   \
 472 {                                                                       \
 473         struct qib_devdata *dd = ppd->dd;                               \
 474         struct qib_ibport *qibp = &ppd->ibport_data;                    \
 475         /*  A write can only zero the counter */                        \
 476         if (data == 0)                                                  \
 477                 qibp->rvp.z_##cntr = get_all_cpu_total(qibp->rvp.cntr); \
 478         else                                                            \
 479                 qib_dev_err(dd, "Per CPU cntrs can only be zeroed");    \
 480 }
 481
 482 def_write_per_cpu(rc_acks)
 483 def_write_per_cpu(rc_qacks)
 484 def_write_per_cpu(rc_delayed_comp)
 485
 486 #define READ_PER_CPU_CNTR(cntr) (get_all_cpu_total(qibp->rvp.cntr) - \
 487                                                         qibp->rvp.z_##cntr)
 488
 489 static ssize_t diagc_attr_show(struct kobject *kobj, struct attribute *attr,
 490                                char *buf)
 491 {
 492         struct qib_diagc_attr *dattr =
 493                 container_of(attr, struct qib_diagc_attr, attr);
 494         struct qib_pportdata *ppd =
 495                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 496         struct qib_ibport *qibp = &ppd->ibport_data;
 497         u64 val;
 498
 499         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 500                 val = READ_PER_CPU_CNTR(rc_acks);
 501         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 502                 val = READ_PER_CPU_CNTR(rc_qacks);
 503         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 504                 val = READ_PER_CPU_CNTR(rc_delayed_comp);
 505         else
 506                 val = *(u32 *)((char *)qibp + dattr->counter);
 507
 508         return sysfs_emit(buf, "%llu\n", val);
 509 }
 510
 511 static ssize_t diagc_attr_store(struct kobject *kobj, struct attribute *attr,
 512                                 const char *buf, size_t size)
 513 {
 514         struct qib_diagc_attr *dattr =
 515                 container_of(attr, struct qib_diagc_attr, attr);
 516         struct qib_pportdata *ppd =
 517                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 518         struct qib_ibport *qibp = &ppd->ibport_data;
 519         u32 val;
 520         int ret;
 521
 522         ret = kstrtou32(buf, 0, &val);
 523         if (ret)
 524                 return ret;
 525
 526         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 527                 write_per_cpu_rc_acks(ppd, val);
 528         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 529                 write_per_cpu_rc_qacks(ppd, val);
 530         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 531                 write_per_cpu_rc_delayed_comp(ppd, val);
 532         else
 533                 *(u32 *)((char *)qibp + dattr->counter) = val;
 534         return size;
 535 }
 536
 537 static const struct sysfs_ops qib_diagc_ops = {
 538         .show = diagc_attr_show,
 539         .store = diagc_attr_store,
 540 };
 541
 542 static struct kobj_type qib_diagc_ktype = {
 543         .release = qib_port_release,
 544         .sysfs_ops = &qib_diagc_ops,
 545         .default_attrs = diagc_default_attributes
 546 };
 547
 548 /* End diag_counters */
 549
 550 /* end of per-port file structures and support code */
 551
 552 /*
 553  * Start of per-unit (or driver, in some cases, but replicated
 554  * per unit) functions (these get a device *)
 555  */
 556 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 557                            char *buf)
 558 {
 559         struct qib_ibdev *dev =
 560                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 561
 562         return sysfs_emit(buf, "%x\n", dd_from_dev(dev)->minrev);
 563 }
 564 static DEVICE_ATTR_RO(hw_rev);
 565
 566 static ssize_t hca_type_show(struct device *device,
 567                              struct device_attribute *attr, char *buf)
 568 {
 569         struct qib_ibdev *dev =
 570                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 571         struct qib_devdata *dd = dd_from_dev(dev);
 572
 573         if (!dd->boardname)
 574                 return -EINVAL;
 575         return sysfs_emit(buf, "%s\n", dd->boardname);
 576 }
 577 static DEVICE_ATTR_RO(hca_type);
 578 static DEVICE_ATTR(board_id, 0444, hca_type_show, NULL);
 579
 580 static ssize_t version_show(struct device *device,
 581                             struct device_attribute *attr, char *buf)
 582 {
 583         /* The string printed here is already newline-terminated. */
 584         return sysfs_emit(buf, "%s", (char *)ib_qib_version);
 585 }
 586 static DEVICE_ATTR_RO(version);
 587
 588 static ssize_t boardversion_show(struct device *device,
 589                                  struct device_attribute *attr, char *buf)
 590 {
 591         struct qib_ibdev *dev =
 592                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 593         struct qib_devdata *dd = dd_from_dev(dev);
 594
 595         /* The string printed here is already newline-terminated. */
 596         return sysfs_emit(buf, "%s", dd->boardversion);
 597 }
 598 static DEVICE_ATTR_RO(boardversion);
 599
 600 static ssize_t localbus_info_show(struct device *device,
 601                                   struct device_attribute *attr, char *buf)
 602 {
 603         struct qib_ibdev *dev =
 604                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 605         struct qib_devdata *dd = dd_from_dev(dev);
 606
 607         /* The string printed here is already newline-terminated. */
 608         return sysfs_emit(buf, "%s", dd->lbus_info);
 609 }
 610 static DEVICE_ATTR_RO(localbus_info);
 611
 612 static ssize_t nctxts_show(struct device *device,
 613                            struct device_attribute *attr, char *buf)
 614 {
 615         struct qib_ibdev *dev =
 616                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 617         struct qib_devdata *dd = dd_from_dev(dev);
 618
 619         /* Return the number of user ports (contexts) available. */
 620         /* The calculation below deals with a special case where
 621          * cfgctxts is set to 1 on a single-port board. */
 622         return sysfs_emit(buf, "%u\n",
 623                           (dd->first_user_ctxt > dd->cfgctxts) ?
 624                                   0 :
 625                                   (dd->cfgctxts - dd->first_user_ctxt));
 626 }
 627 static DEVICE_ATTR_RO(nctxts);
 628
 629 static ssize_t nfreectxts_show(struct device *device,
 630                                struct device_attribute *attr, char *buf)
 631 {
 632         struct qib_ibdev *dev =
 633                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 634         struct qib_devdata *dd = dd_from_dev(dev);
 635
 636         /* Return the number of free user ports (contexts) available. */
 637         return sysfs_emit(buf, "%u\n", dd->freectxts);
 638 }
 639 static DEVICE_ATTR_RO(nfreectxts);
 640
 641 static ssize_t serial_show(struct device *device, struct device_attribute *attr,
 642                            char *buf)
 643 {
 644         struct qib_ibdev *dev =
 645                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 646         struct qib_devdata *dd = dd_from_dev(dev);
 647         const u8 *end = memchr(dd->serial, 0, ARRAY_SIZE(dd->serial));
 648         int size = end ? end - dd->serial : ARRAY_SIZE(dd->serial);
 649
 650         return sysfs_emit(buf, ".%*s\n", size, dd->serial);
 651 }
 652 static DEVICE_ATTR_RO(serial);
 653
 654 static ssize_t chip_reset_store(struct device *device,
 655                                 struct device_attribute *attr, const char *buf,
 656                                 size_t count)
 657 {
 658         struct qib_ibdev *dev =
 659                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 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 static DEVICE_ATTR_WO(chip_reset);
 673
 674 /*
 675  * Dump tempsense regs. in decimal, to ease shell-scripts.
 676  */
 677 static ssize_t tempsense_show(struct device *device,
 678                               struct device_attribute *attr, char *buf)
 679 {
 680         struct qib_ibdev *dev =
 681                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 682         struct qib_devdata *dd = dd_from_dev(dev);
 683         int i;
 684         u8 regvals[8];
 685
 686         for (i = 0; i < 8; i++) {
 687                 int ret;
 688
 689                 if (i == 6)
 690                         continue;
 691                 ret = dd->f_tempsense_rd(dd, i);
 692                 if (ret < 0)
 693                         return ret;     /* return error on bad read */
 694                 regvals[i] = ret;
 695         }
 696         return sysfs_emit(buf, "%d %d %02X %02X %d %d\n",
 697                           (signed char)regvals[0],
 698                           (signed char)regvals[1],
 699                           regvals[2],
 700                           regvals[3],
 701                           (signed char)regvals[5],
 702                           (signed char)regvals[7]);
 703 }
 704 static DEVICE_ATTR_RO(tempsense);
 705
 706 /*
 707  * end of per-unit (or driver, in some cases, but replicated
 708  * per unit) functions
 709  */
 710
 711 /* start of per-unit file structures and support code */
 712 static struct attribute *qib_attributes[] = {
 713         &dev_attr_hw_rev.attr,
 714         &dev_attr_hca_type.attr,
 715         &dev_attr_board_id.attr,
 716         &dev_attr_version.attr,
 717         &dev_attr_nctxts.attr,
 718         &dev_attr_nfreectxts.attr,
 719         &dev_attr_serial.attr,
 720         &dev_attr_boardversion.attr,
 721         &dev_attr_tempsense.attr,
 722         &dev_attr_localbus_info.attr,
 723         &dev_attr_chip_reset.attr,
 724         NULL,
 725 };
 726
 727 const struct attribute_group qib_attr_group = {
 728         .attrs = qib_attributes,
 729 };
 730
 731 int qib_create_port_files(struct ib_device *ibdev, u32 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_link;
 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_sl;
 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_diagc;
 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_cc;
 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  * Unregister and remove our files in /sys/class/infiniband.
 831  */
 832 void qib_verbs_unregister_sysfs(struct qib_devdata *dd)
 833 {
 834         struct qib_pportdata *ppd;
 835         int i;
 836
 837         for (i = 0; i < dd->num_pports; i++) {
 838                 ppd = &dd->pport[i];
 839                 if (qib_cc_table_size &&
 840                         ppd->congestion_entries_shadow) {
 841                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 842                                 &cc_setting_bin_attr);
 843                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 844                                 &cc_table_bin_attr);
 845                         kobject_put(&ppd->pport_cc_kobj);
 846                 }
 847                 kobject_put(&ppd->diagc_kobj);
 848                 kobject_put(&ppd->sl2vl_kobj);
 849                 kobject_put(&ppd->pport_kobj);
 850         }
 851 }