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 const 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 const 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 QIB_DIAGC_ATTR(rc_crwaits);
 446
 447 static struct attribute *diagc_default_attributes[] = {
 448         &qib_diagc_attr_rc_resends.attr,
 449         &qib_diagc_attr_rc_acks.attr,
 450         &qib_diagc_attr_rc_qacks.attr,
 451         &qib_diagc_attr_rc_delayed_comp.attr,
 452         &qib_diagc_attr_seq_naks.attr,
 453         &qib_diagc_attr_rdma_seq.attr,
 454         &qib_diagc_attr_rnr_naks.attr,
 455         &qib_diagc_attr_other_naks.attr,
 456         &qib_diagc_attr_rc_timeouts.attr,
 457         &qib_diagc_attr_loop_pkts.attr,
 458         &qib_diagc_attr_pkt_drops.attr,
 459         &qib_diagc_attr_dmawait.attr,
 460         &qib_diagc_attr_unaligned.attr,
 461         &qib_diagc_attr_rc_dupreq.attr,
 462         &qib_diagc_attr_rc_seqnak.attr,
 463         &qib_diagc_attr_rc_crwaits.attr,
 464         NULL
 465 };
 466
 467 static u64 get_all_cpu_total(u64 __percpu *cntr)
 468 {
 469         int cpu;
 470         u64 counter = 0;
 471
 472         for_each_possible_cpu(cpu)
 473                 counter += *per_cpu_ptr(cntr, cpu);
 474         return counter;
 475 }
 476
 477 #define def_write_per_cpu(cntr) \
 478 static void write_per_cpu_##cntr(struct qib_pportdata *ppd, u32 data)   \
 479 {                                                                       \
 480         struct qib_devdata *dd = ppd->dd;                               \
 481         struct qib_ibport *qibp = &ppd->ibport_data;                    \
 482         /*  A write can only zero the counter */                        \
 483         if (data == 0)                                                  \
 484                 qibp->rvp.z_##cntr = get_all_cpu_total(qibp->rvp.cntr); \
 485         else                                                            \
 486                 qib_dev_err(dd, "Per CPU cntrs can only be zeroed");    \
 487 }
 488
 489 def_write_per_cpu(rc_acks)
 490 def_write_per_cpu(rc_qacks)
 491 def_write_per_cpu(rc_delayed_comp)
 492
 493 #define READ_PER_CPU_CNTR(cntr) (get_all_cpu_total(qibp->rvp.cntr) - \
 494                                                         qibp->rvp.z_##cntr)
 495
 496 static ssize_t diagc_attr_show(struct kobject *kobj, struct attribute *attr,
 497                                char *buf)
 498 {
 499         struct qib_diagc_attr *dattr =
 500                 container_of(attr, struct qib_diagc_attr, attr);
 501         struct qib_pportdata *ppd =
 502                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 503         struct qib_ibport *qibp = &ppd->ibport_data;
 504
 505         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 506                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_acks));
 507         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 508                 return sprintf(buf, "%llu\n", READ_PER_CPU_CNTR(rc_qacks));
 509         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 510                 return sprintf(buf, "%llu\n",
 511                                         READ_PER_CPU_CNTR(rc_delayed_comp));
 512         else
 513                 return sprintf(buf, "%u\n",
 514                                 *(u32 *)((char *)qibp + dattr->counter));
 515 }
 516
 517 static ssize_t diagc_attr_store(struct kobject *kobj, struct attribute *attr,
 518                                 const char *buf, size_t size)
 519 {
 520         struct qib_diagc_attr *dattr =
 521                 container_of(attr, struct qib_diagc_attr, attr);
 522         struct qib_pportdata *ppd =
 523                 container_of(kobj, struct qib_pportdata, diagc_kobj);
 524         struct qib_ibport *qibp = &ppd->ibport_data;
 525         u32 val;
 526         int ret;
 527
 528         ret = kstrtou32(buf, 0, &val);
 529         if (ret)
 530                 return ret;
 531
 532         if (!strncmp(dattr->attr.name, "rc_acks", 7))
 533                 write_per_cpu_rc_acks(ppd, val);
 534         else if (!strncmp(dattr->attr.name, "rc_qacks", 8))
 535                 write_per_cpu_rc_qacks(ppd, val);
 536         else if (!strncmp(dattr->attr.name, "rc_delayed_comp", 15))
 537                 write_per_cpu_rc_delayed_comp(ppd, val);
 538         else
 539                 *(u32 *)((char *)qibp + dattr->counter) = val;
 540         return size;
 541 }
 542
 543 static const struct sysfs_ops qib_diagc_ops = {
 544         .show = diagc_attr_show,
 545         .store = diagc_attr_store,
 546 };
 547
 548 static struct kobj_type qib_diagc_ktype = {
 549         .release = qib_port_release,
 550         .sysfs_ops = &qib_diagc_ops,
 551         .default_attrs = diagc_default_attributes
 552 };
 553
 554 /* End diag_counters */
 555
 556 /* end of per-port file structures and support code */
 557
 558 /*
 559  * Start of per-unit (or driver, in some cases, but replicated
 560  * per unit) functions (these get a device *)
 561  */
 562 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 563                            char *buf)
 564 {
 565         struct qib_ibdev *dev =
 566                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 567
 568         return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
 569 }
 570 static DEVICE_ATTR_RO(hw_rev);
 571
 572 static ssize_t hca_type_show(struct device *device,
 573                              struct device_attribute *attr, char *buf)
 574 {
 575         struct qib_ibdev *dev =
 576                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 577         struct qib_devdata *dd = dd_from_dev(dev);
 578         int ret;
 579
 580         if (!dd->boardname)
 581                 ret = -EINVAL;
 582         else
 583                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
 584         return ret;
 585 }
 586 static DEVICE_ATTR_RO(hca_type);
 587 static DEVICE_ATTR(board_id, 0444, hca_type_show, NULL);
 588
 589 static ssize_t version_show(struct device *device,
 590                             struct device_attribute *attr, char *buf)
 591 {
 592         /* The string printed here is already newline-terminated. */
 593         return scnprintf(buf, PAGE_SIZE, "%s", (char *)ib_qib_version);
 594 }
 595 static DEVICE_ATTR_RO(version);
 596
 597 static ssize_t boardversion_show(struct device *device,
 598                                  struct device_attribute *attr, char *buf)
 599 {
 600         struct qib_ibdev *dev =
 601                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 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->boardversion);
 606 }
 607 static DEVICE_ATTR_RO(boardversion);
 608
 609 static ssize_t localbus_info_show(struct device *device,
 610                                   struct device_attribute *attr, char *buf)
 611 {
 612         struct qib_ibdev *dev =
 613                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 614         struct qib_devdata *dd = dd_from_dev(dev);
 615
 616         /* The string printed here is already newline-terminated. */
 617         return scnprintf(buf, PAGE_SIZE, "%s", dd->lbus_info);
 618 }
 619 static DEVICE_ATTR_RO(localbus_info);
 620
 621 static ssize_t nctxts_show(struct device *device,
 622                            struct device_attribute *attr, char *buf)
 623 {
 624         struct qib_ibdev *dev =
 625                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 626         struct qib_devdata *dd = dd_from_dev(dev);
 627
 628         /* Return the number of user ports (contexts) available. */
 629         /* The calculation below deals with a special case where
 630          * cfgctxts is set to 1 on a single-port board. */
 631         return scnprintf(buf, PAGE_SIZE, "%u\n",
 632                         (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
 633                         (dd->cfgctxts - dd->first_user_ctxt));
 634 }
 635 static DEVICE_ATTR_RO(nctxts);
 636
 637 static ssize_t nfreectxts_show(struct device *device,
 638                                struct device_attribute *attr, char *buf)
 639 {
 640         struct qib_ibdev *dev =
 641                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 642         struct qib_devdata *dd = dd_from_dev(dev);
 643
 644         /* Return the number of free user ports (contexts) available. */
 645         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
 646 }
 647 static DEVICE_ATTR_RO(nfreectxts);
 648
 649 static ssize_t serial_show(struct device *device,
 650                            struct device_attribute *attr, char *buf)
 651 {
 652         struct qib_ibdev *dev =
 653                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 654         struct qib_devdata *dd = dd_from_dev(dev);
 655
 656         buf[sizeof(dd->serial)] = '\0';
 657         memcpy(buf, dd->serial, sizeof(dd->serial));
 658         strcat(buf, "\n");
 659         return strlen(buf);
 660 }
 661 static DEVICE_ATTR_RO(serial);
 662
 663 static ssize_t chip_reset_store(struct device *device,
 664                                 struct device_attribute *attr, const char *buf,
 665                                 size_t count)
 666 {
 667         struct qib_ibdev *dev =
 668                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 669         struct qib_devdata *dd = dd_from_dev(dev);
 670         int ret;
 671
 672         if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
 673                 ret = -EINVAL;
 674                 goto bail;
 675         }
 676
 677         ret = qib_reset_device(dd->unit);
 678 bail:
 679         return ret < 0 ? ret : count;
 680 }
 681 static DEVICE_ATTR_WO(chip_reset);
 682
 683 /*
 684  * Dump tempsense regs. in decimal, to ease shell-scripts.
 685  */
 686 static ssize_t tempsense_show(struct device *device,
 687                               struct device_attribute *attr, char *buf)
 688 {
 689         struct qib_ibdev *dev =
 690                 rdma_device_to_drv_device(device, struct qib_ibdev, rdi.ibdev);
 691         struct qib_devdata *dd = dd_from_dev(dev);
 692         int ret;
 693         int idx;
 694         u8 regvals[8];
 695
 696         ret = -ENXIO;
 697         for (idx = 0; idx < 8; ++idx) {
 698                 if (idx == 6)
 699                         continue;
 700                 ret = dd->f_tempsense_rd(dd, idx);
 701                 if (ret < 0)
 702                         break;
 703                 regvals[idx] = ret;
 704         }
 705         if (idx == 8)
 706                 ret = scnprintf(buf, PAGE_SIZE, "%d %d %02X %02X %d %d\n",
 707                                 *(signed char *)(regvals),
 708                                 *(signed char *)(regvals + 1),
 709                                 regvals[2], regvals[3],
 710                                 *(signed char *)(regvals + 5),
 711                                 *(signed char *)(regvals + 7));
 712         return ret;
 713 }
 714 static DEVICE_ATTR_RO(tempsense);
 715
 716 /*
 717  * end of per-unit (or driver, in some cases, but replicated
 718  * per unit) functions
 719  */
 720
 721 /* start of per-unit file structures and support code */
 722 static struct attribute *qib_attributes[] = {
 723         &dev_attr_hw_rev.attr,
 724         &dev_attr_hca_type.attr,
 725         &dev_attr_board_id.attr,
 726         &dev_attr_version.attr,
 727         &dev_attr_nctxts.attr,
 728         &dev_attr_nfreectxts.attr,
 729         &dev_attr_serial.attr,
 730         &dev_attr_boardversion.attr,
 731         &dev_attr_tempsense.attr,
 732         &dev_attr_localbus_info.attr,
 733         &dev_attr_chip_reset.attr,
 734         NULL,
 735 };
 736
 737 const struct attribute_group qib_attr_group = {
 738         .attrs = qib_attributes,
 739 };
 740
 741 int qib_create_port_files(struct ib_device *ibdev, u8 port_num,
 742                           struct kobject *kobj)
 743 {
 744         struct qib_pportdata *ppd;
 745         struct qib_devdata *dd = dd_from_ibdev(ibdev);
 746         int ret;
 747
 748         if (!port_num || port_num > dd->num_pports) {
 749                 qib_dev_err(dd,
 750                         "Skipping infiniband class with invalid port %u\n",
 751                         port_num);
 752                 ret = -ENODEV;
 753                 goto bail;
 754         }
 755         ppd = &dd->pport[port_num - 1];
 756
 757         ret = kobject_init_and_add(&ppd->pport_kobj, &qib_port_ktype, kobj,
 758                                    "linkcontrol");
 759         if (ret) {
 760                 qib_dev_err(dd,
 761                         "Skipping linkcontrol sysfs info, (err %d) port %u\n",
 762                         ret, port_num);
 763                 goto bail;
 764         }
 765         kobject_uevent(&ppd->pport_kobj, KOBJ_ADD);
 766
 767         ret = kobject_init_and_add(&ppd->sl2vl_kobj, &qib_sl2vl_ktype, kobj,
 768                                    "sl2vl");
 769         if (ret) {
 770                 qib_dev_err(dd,
 771                         "Skipping sl2vl sysfs info, (err %d) port %u\n",
 772                         ret, port_num);
 773                 goto bail_link;
 774         }
 775         kobject_uevent(&ppd->sl2vl_kobj, KOBJ_ADD);
 776
 777         ret = kobject_init_and_add(&ppd->diagc_kobj, &qib_diagc_ktype, kobj,
 778                                    "diag_counters");
 779         if (ret) {
 780                 qib_dev_err(dd,
 781                         "Skipping diag_counters sysfs info, (err %d) port %u\n",
 782                         ret, port_num);
 783                 goto bail_sl;
 784         }
 785         kobject_uevent(&ppd->diagc_kobj, KOBJ_ADD);
 786
 787         if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
 788                 return 0;
 789
 790         ret = kobject_init_and_add(&ppd->pport_cc_kobj, &qib_port_cc_ktype,
 791                                 kobj, "CCMgtA");
 792         if (ret) {
 793                 qib_dev_err(dd,
 794                  "Skipping Congestion Control sysfs info, (err %d) port %u\n",
 795                  ret, port_num);
 796                 goto bail_diagc;
 797         }
 798
 799         kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
 800
 801         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 802                                 &cc_setting_bin_attr);
 803         if (ret) {
 804                 qib_dev_err(dd,
 805                  "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
 806                  ret, port_num);
 807                 goto bail_cc;
 808         }
 809
 810         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
 811                                 &cc_table_bin_attr);
 812         if (ret) {
 813                 qib_dev_err(dd,
 814                  "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
 815                  ret, port_num);
 816                 goto bail_cc_entry_bin;
 817         }
 818
 819         qib_devinfo(dd->pcidev,
 820                 "IB%u: Congestion Control Agent enabled for port %d\n",
 821                 dd->unit, port_num);
 822
 823         return 0;
 824
 825 bail_cc_entry_bin:
 826         sysfs_remove_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
 827 bail_cc:
 828         kobject_put(&ppd->pport_cc_kobj);
 829 bail_diagc:
 830         kobject_put(&ppd->diagc_kobj);
 831 bail_sl:
 832         kobject_put(&ppd->sl2vl_kobj);
 833 bail_link:
 834         kobject_put(&ppd->pport_kobj);
 835 bail:
 836         return ret;
 837 }
 838
 839 /*
 840  * Unregister and remove our files in /sys/class/infiniband.
 841  */
 842 void qib_verbs_unregister_sysfs(struct qib_devdata *dd)
 843 {
 844         struct qib_pportdata *ppd;
 845         int i;
 846
 847         for (i = 0; i < dd->num_pports; i++) {
 848                 ppd = &dd->pport[i];
 849                 if (qib_cc_table_size &&
 850                         ppd->congestion_entries_shadow) {
 851                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 852                                 &cc_setting_bin_attr);
 853                         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 854                                 &cc_table_bin_attr);
 855                         kobject_put(&ppd->pport_cc_kobj);
 856                 }
 857                 kobject_put(&ppd->sl2vl_kobj);
 858                 kobject_put(&ppd->pport_kobj);
 859         }
 860 }