drivers/infiniband/hw/hfi1/sysfs.c

   1 /*
   2  * Copyright(c) 2015-2017 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47 #include <linux/ctype.h>
  48
  49 #include "hfi.h"
  50 #include "mad.h"
  51 #include "trace.h"
  52
  53 /*
  54  * Start of per-port congestion control structures and support code
  55  */
  56
  57 /*
  58  * Congestion control table size followed by table entries
  59  */
  60 static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
  61                                  struct bin_attribute *bin_attr,
  62                                  char *buf, loff_t pos, size_t count)
  63 {
  64         int ret;
  65         struct hfi1_pportdata *ppd =
  66                 container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
  67         struct cc_state *cc_state;
  68
  69         ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
  70                  + sizeof(__be16);
  71
  72         if (pos > ret)
  73                 return -EINVAL;
  74
  75         if (count > ret - pos)
  76                 count = ret - pos;
  77
  78         if (!count)
  79                 return count;
  80
  81         rcu_read_lock();
  82         cc_state = get_cc_state(ppd);
  83         if (!cc_state) {
  84                 rcu_read_unlock();
  85                 return -EINVAL;
  86         }
  87         memcpy(buf, (void *)&cc_state->cct + pos, count);
  88         rcu_read_unlock();
  89
  90         return count;
  91 }
  92
  93 static void port_release(struct kobject *kobj)
  94 {
  95         /* nothing to do since memory is freed by hfi1_free_devdata() */
  96 }
  97
  98 static const struct bin_attribute cc_table_bin_attr = {
  99         .attr = {.name = "cc_table_bin", .mode = 0444},
 100         .read = read_cc_table_bin,
 101         .size = PAGE_SIZE,
 102 };
 103
 104 /*
 105  * Congestion settings: port control, control map and an array of 16
 106  * entries for the congestion entries - increase, timer, event log
 107  * trigger threshold and the minimum injection rate delay.
 108  */
 109 static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
 110                                    struct bin_attribute *bin_attr,
 111                                    char *buf, loff_t pos, size_t count)
 112 {
 113         int ret;
 114         struct hfi1_pportdata *ppd =
 115                 container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
 116         struct cc_state *cc_state;
 117
 118         ret = sizeof(struct opa_congestion_setting_attr_shadow);
 119
 120         if (pos > ret)
 121                 return -EINVAL;
 122         if (count > ret - pos)
 123                 count = ret - pos;
 124
 125         if (!count)
 126                 return count;
 127
 128         rcu_read_lock();
 129         cc_state = get_cc_state(ppd);
 130         if (!cc_state) {
 131                 rcu_read_unlock();
 132                 return -EINVAL;
 133         }
 134         memcpy(buf, (void *)&cc_state->cong_setting + pos, count);
 135         rcu_read_unlock();
 136
 137         return count;
 138 }
 139
 140 static const struct bin_attribute cc_setting_bin_attr = {
 141         .attr = {.name = "cc_settings_bin", .mode = 0444},
 142         .read = read_cc_setting_bin,
 143         .size = PAGE_SIZE,
 144 };
 145
 146 struct hfi1_port_attr {
 147         struct attribute attr;
 148         ssize_t (*show)(struct hfi1_pportdata *, char *);
 149         ssize_t (*store)(struct hfi1_pportdata *, const char *, size_t);
 150 };
 151
 152 static ssize_t cc_prescan_show(struct hfi1_pportdata *ppd, char *buf)
 153 {
 154         return sprintf(buf, "%s\n", ppd->cc_prescan ? "on" : "off");
 155 }
 156
 157 static ssize_t cc_prescan_store(struct hfi1_pportdata *ppd, const char *buf,
 158                                 size_t count)
 159 {
 160         if (!memcmp(buf, "on", 2))
 161                 ppd->cc_prescan = true;
 162         else if (!memcmp(buf, "off", 3))
 163                 ppd->cc_prescan = false;
 164
 165         return count;
 166 }
 167
 168 static struct hfi1_port_attr cc_prescan_attr =
 169                 __ATTR(cc_prescan, 0600, cc_prescan_show, cc_prescan_store);
 170
 171 static ssize_t cc_attr_show(struct kobject *kobj, struct attribute *attr,
 172                             char *buf)
 173 {
 174         struct hfi1_port_attr *port_attr =
 175                 container_of(attr, struct hfi1_port_attr, attr);
 176         struct hfi1_pportdata *ppd =
 177                 container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
 178
 179         return port_attr->show(ppd, buf);
 180 }
 181
 182 static ssize_t cc_attr_store(struct kobject *kobj, struct attribute *attr,
 183                              const char *buf, size_t count)
 184 {
 185         struct hfi1_port_attr *port_attr =
 186                 container_of(attr, struct hfi1_port_attr, attr);
 187         struct hfi1_pportdata *ppd =
 188                 container_of(kobj, struct hfi1_pportdata, pport_cc_kobj);
 189
 190         return port_attr->store(ppd, buf, count);
 191 }
 192
 193 static const struct sysfs_ops port_cc_sysfs_ops = {
 194         .show = cc_attr_show,
 195         .store = cc_attr_store
 196 };
 197
 198 static struct attribute *port_cc_default_attributes[] = {
 199         &cc_prescan_attr.attr,
 200         NULL
 201 };
 202
 203 static struct kobj_type port_cc_ktype = {
 204         .release = port_release,
 205         .sysfs_ops = &port_cc_sysfs_ops,
 206         .default_attrs = port_cc_default_attributes
 207 };
 208
 209 /* Start sc2vl */
 210 #define HFI1_SC2VL_ATTR(N)                                  \
 211         static struct hfi1_sc2vl_attr hfi1_sc2vl_attr_##N = { \
 212                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 213                 .sc = N \
 214         }
 215
 216 struct hfi1_sc2vl_attr {
 217         struct attribute attr;
 218         int sc;
 219 };
 220
 221 HFI1_SC2VL_ATTR(0);
 222 HFI1_SC2VL_ATTR(1);
 223 HFI1_SC2VL_ATTR(2);
 224 HFI1_SC2VL_ATTR(3);
 225 HFI1_SC2VL_ATTR(4);
 226 HFI1_SC2VL_ATTR(5);
 227 HFI1_SC2VL_ATTR(6);
 228 HFI1_SC2VL_ATTR(7);
 229 HFI1_SC2VL_ATTR(8);
 230 HFI1_SC2VL_ATTR(9);
 231 HFI1_SC2VL_ATTR(10);
 232 HFI1_SC2VL_ATTR(11);
 233 HFI1_SC2VL_ATTR(12);
 234 HFI1_SC2VL_ATTR(13);
 235 HFI1_SC2VL_ATTR(14);
 236 HFI1_SC2VL_ATTR(15);
 237 HFI1_SC2VL_ATTR(16);
 238 HFI1_SC2VL_ATTR(17);
 239 HFI1_SC2VL_ATTR(18);
 240 HFI1_SC2VL_ATTR(19);
 241 HFI1_SC2VL_ATTR(20);
 242 HFI1_SC2VL_ATTR(21);
 243 HFI1_SC2VL_ATTR(22);
 244 HFI1_SC2VL_ATTR(23);
 245 HFI1_SC2VL_ATTR(24);
 246 HFI1_SC2VL_ATTR(25);
 247 HFI1_SC2VL_ATTR(26);
 248 HFI1_SC2VL_ATTR(27);
 249 HFI1_SC2VL_ATTR(28);
 250 HFI1_SC2VL_ATTR(29);
 251 HFI1_SC2VL_ATTR(30);
 252 HFI1_SC2VL_ATTR(31);
 253
 254 static struct attribute *sc2vl_default_attributes[] = {
 255         &hfi1_sc2vl_attr_0.attr,
 256         &hfi1_sc2vl_attr_1.attr,
 257         &hfi1_sc2vl_attr_2.attr,
 258         &hfi1_sc2vl_attr_3.attr,
 259         &hfi1_sc2vl_attr_4.attr,
 260         &hfi1_sc2vl_attr_5.attr,
 261         &hfi1_sc2vl_attr_6.attr,
 262         &hfi1_sc2vl_attr_7.attr,
 263         &hfi1_sc2vl_attr_8.attr,
 264         &hfi1_sc2vl_attr_9.attr,
 265         &hfi1_sc2vl_attr_10.attr,
 266         &hfi1_sc2vl_attr_11.attr,
 267         &hfi1_sc2vl_attr_12.attr,
 268         &hfi1_sc2vl_attr_13.attr,
 269         &hfi1_sc2vl_attr_14.attr,
 270         &hfi1_sc2vl_attr_15.attr,
 271         &hfi1_sc2vl_attr_16.attr,
 272         &hfi1_sc2vl_attr_17.attr,
 273         &hfi1_sc2vl_attr_18.attr,
 274         &hfi1_sc2vl_attr_19.attr,
 275         &hfi1_sc2vl_attr_20.attr,
 276         &hfi1_sc2vl_attr_21.attr,
 277         &hfi1_sc2vl_attr_22.attr,
 278         &hfi1_sc2vl_attr_23.attr,
 279         &hfi1_sc2vl_attr_24.attr,
 280         &hfi1_sc2vl_attr_25.attr,
 281         &hfi1_sc2vl_attr_26.attr,
 282         &hfi1_sc2vl_attr_27.attr,
 283         &hfi1_sc2vl_attr_28.attr,
 284         &hfi1_sc2vl_attr_29.attr,
 285         &hfi1_sc2vl_attr_30.attr,
 286         &hfi1_sc2vl_attr_31.attr,
 287         NULL
 288 };
 289
 290 static ssize_t sc2vl_attr_show(struct kobject *kobj, struct attribute *attr,
 291                                char *buf)
 292 {
 293         struct hfi1_sc2vl_attr *sattr =
 294                 container_of(attr, struct hfi1_sc2vl_attr, attr);
 295         struct hfi1_pportdata *ppd =
 296                 container_of(kobj, struct hfi1_pportdata, sc2vl_kobj);
 297         struct hfi1_devdata *dd = ppd->dd;
 298
 299         return sprintf(buf, "%u\n", *((u8 *)dd->sc2vl + sattr->sc));
 300 }
 301
 302 static const struct sysfs_ops hfi1_sc2vl_ops = {
 303         .show = sc2vl_attr_show,
 304 };
 305
 306 static struct kobj_type hfi1_sc2vl_ktype = {
 307         .release = port_release,
 308         .sysfs_ops = &hfi1_sc2vl_ops,
 309         .default_attrs = sc2vl_default_attributes
 310 };
 311
 312 /* End sc2vl */
 313
 314 /* Start sl2sc */
 315 #define HFI1_SL2SC_ATTR(N)                                  \
 316         static struct hfi1_sl2sc_attr hfi1_sl2sc_attr_##N = {     \
 317                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 318                 .sl = N                                           \
 319         }
 320
 321 struct hfi1_sl2sc_attr {
 322         struct attribute attr;
 323         int sl;
 324 };
 325
 326 HFI1_SL2SC_ATTR(0);
 327 HFI1_SL2SC_ATTR(1);
 328 HFI1_SL2SC_ATTR(2);
 329 HFI1_SL2SC_ATTR(3);
 330 HFI1_SL2SC_ATTR(4);
 331 HFI1_SL2SC_ATTR(5);
 332 HFI1_SL2SC_ATTR(6);
 333 HFI1_SL2SC_ATTR(7);
 334 HFI1_SL2SC_ATTR(8);
 335 HFI1_SL2SC_ATTR(9);
 336 HFI1_SL2SC_ATTR(10);
 337 HFI1_SL2SC_ATTR(11);
 338 HFI1_SL2SC_ATTR(12);
 339 HFI1_SL2SC_ATTR(13);
 340 HFI1_SL2SC_ATTR(14);
 341 HFI1_SL2SC_ATTR(15);
 342 HFI1_SL2SC_ATTR(16);
 343 HFI1_SL2SC_ATTR(17);
 344 HFI1_SL2SC_ATTR(18);
 345 HFI1_SL2SC_ATTR(19);
 346 HFI1_SL2SC_ATTR(20);
 347 HFI1_SL2SC_ATTR(21);
 348 HFI1_SL2SC_ATTR(22);
 349 HFI1_SL2SC_ATTR(23);
 350 HFI1_SL2SC_ATTR(24);
 351 HFI1_SL2SC_ATTR(25);
 352 HFI1_SL2SC_ATTR(26);
 353 HFI1_SL2SC_ATTR(27);
 354 HFI1_SL2SC_ATTR(28);
 355 HFI1_SL2SC_ATTR(29);
 356 HFI1_SL2SC_ATTR(30);
 357 HFI1_SL2SC_ATTR(31);
 358
 359 static struct attribute *sl2sc_default_attributes[] = {
 360         &hfi1_sl2sc_attr_0.attr,
 361         &hfi1_sl2sc_attr_1.attr,
 362         &hfi1_sl2sc_attr_2.attr,
 363         &hfi1_sl2sc_attr_3.attr,
 364         &hfi1_sl2sc_attr_4.attr,
 365         &hfi1_sl2sc_attr_5.attr,
 366         &hfi1_sl2sc_attr_6.attr,
 367         &hfi1_sl2sc_attr_7.attr,
 368         &hfi1_sl2sc_attr_8.attr,
 369         &hfi1_sl2sc_attr_9.attr,
 370         &hfi1_sl2sc_attr_10.attr,
 371         &hfi1_sl2sc_attr_11.attr,
 372         &hfi1_sl2sc_attr_12.attr,
 373         &hfi1_sl2sc_attr_13.attr,
 374         &hfi1_sl2sc_attr_14.attr,
 375         &hfi1_sl2sc_attr_15.attr,
 376         &hfi1_sl2sc_attr_16.attr,
 377         &hfi1_sl2sc_attr_17.attr,
 378         &hfi1_sl2sc_attr_18.attr,
 379         &hfi1_sl2sc_attr_19.attr,
 380         &hfi1_sl2sc_attr_20.attr,
 381         &hfi1_sl2sc_attr_21.attr,
 382         &hfi1_sl2sc_attr_22.attr,
 383         &hfi1_sl2sc_attr_23.attr,
 384         &hfi1_sl2sc_attr_24.attr,
 385         &hfi1_sl2sc_attr_25.attr,
 386         &hfi1_sl2sc_attr_26.attr,
 387         &hfi1_sl2sc_attr_27.attr,
 388         &hfi1_sl2sc_attr_28.attr,
 389         &hfi1_sl2sc_attr_29.attr,
 390         &hfi1_sl2sc_attr_30.attr,
 391         &hfi1_sl2sc_attr_31.attr,
 392         NULL
 393 };
 394
 395 static ssize_t sl2sc_attr_show(struct kobject *kobj, struct attribute *attr,
 396                                char *buf)
 397 {
 398         struct hfi1_sl2sc_attr *sattr =
 399                 container_of(attr, struct hfi1_sl2sc_attr, attr);
 400         struct hfi1_pportdata *ppd =
 401                 container_of(kobj, struct hfi1_pportdata, sl2sc_kobj);
 402         struct hfi1_ibport *ibp = &ppd->ibport_data;
 403
 404         return sprintf(buf, "%u\n", ibp->sl_to_sc[sattr->sl]);
 405 }
 406
 407 static const struct sysfs_ops hfi1_sl2sc_ops = {
 408         .show = sl2sc_attr_show,
 409 };
 410
 411 static struct kobj_type hfi1_sl2sc_ktype = {
 412         .release = port_release,
 413         .sysfs_ops = &hfi1_sl2sc_ops,
 414         .default_attrs = sl2sc_default_attributes
 415 };
 416
 417 /* End sl2sc */
 418
 419 /* Start vl2mtu */
 420
 421 #define HFI1_VL2MTU_ATTR(N) \
 422         static struct hfi1_vl2mtu_attr hfi1_vl2mtu_attr_##N = { \
 423                 .attr = { .name = __stringify(N), .mode = 0444 }, \
 424                 .vl = N                                           \
 425         }
 426
 427 struct hfi1_vl2mtu_attr {
 428         struct attribute attr;
 429         int vl;
 430 };
 431
 432 HFI1_VL2MTU_ATTR(0);
 433 HFI1_VL2MTU_ATTR(1);
 434 HFI1_VL2MTU_ATTR(2);
 435 HFI1_VL2MTU_ATTR(3);
 436 HFI1_VL2MTU_ATTR(4);
 437 HFI1_VL2MTU_ATTR(5);
 438 HFI1_VL2MTU_ATTR(6);
 439 HFI1_VL2MTU_ATTR(7);
 440 HFI1_VL2MTU_ATTR(8);
 441 HFI1_VL2MTU_ATTR(9);
 442 HFI1_VL2MTU_ATTR(10);
 443 HFI1_VL2MTU_ATTR(11);
 444 HFI1_VL2MTU_ATTR(12);
 445 HFI1_VL2MTU_ATTR(13);
 446 HFI1_VL2MTU_ATTR(14);
 447 HFI1_VL2MTU_ATTR(15);
 448
 449 static struct attribute *vl2mtu_default_attributes[] = {
 450         &hfi1_vl2mtu_attr_0.attr,
 451         &hfi1_vl2mtu_attr_1.attr,
 452         &hfi1_vl2mtu_attr_2.attr,
 453         &hfi1_vl2mtu_attr_3.attr,
 454         &hfi1_vl2mtu_attr_4.attr,
 455         &hfi1_vl2mtu_attr_5.attr,
 456         &hfi1_vl2mtu_attr_6.attr,
 457         &hfi1_vl2mtu_attr_7.attr,
 458         &hfi1_vl2mtu_attr_8.attr,
 459         &hfi1_vl2mtu_attr_9.attr,
 460         &hfi1_vl2mtu_attr_10.attr,
 461         &hfi1_vl2mtu_attr_11.attr,
 462         &hfi1_vl2mtu_attr_12.attr,
 463         &hfi1_vl2mtu_attr_13.attr,
 464         &hfi1_vl2mtu_attr_14.attr,
 465         &hfi1_vl2mtu_attr_15.attr,
 466         NULL
 467 };
 468
 469 static ssize_t vl2mtu_attr_show(struct kobject *kobj, struct attribute *attr,
 470                                 char *buf)
 471 {
 472         struct hfi1_vl2mtu_attr *vlattr =
 473                 container_of(attr, struct hfi1_vl2mtu_attr, attr);
 474         struct hfi1_pportdata *ppd =
 475                 container_of(kobj, struct hfi1_pportdata, vl2mtu_kobj);
 476         struct hfi1_devdata *dd = ppd->dd;
 477
 478         return sprintf(buf, "%u\n", dd->vld[vlattr->vl].mtu);
 479 }
 480
 481 static const struct sysfs_ops hfi1_vl2mtu_ops = {
 482         .show = vl2mtu_attr_show,
 483 };
 484
 485 static struct kobj_type hfi1_vl2mtu_ktype = {
 486         .release = port_release,
 487         .sysfs_ops = &hfi1_vl2mtu_ops,
 488         .default_attrs = vl2mtu_default_attributes
 489 };
 490
 491 /* end of per-port file structures and support code */
 492
 493 /*
 494  * Start of per-unit (or driver, in some cases, but replicated
 495  * per unit) functions (these get a device *)
 496  */
 497 static ssize_t hw_rev_show(struct device *device, struct device_attribute *attr,
 498                            char *buf)
 499 {
 500         struct hfi1_ibdev *dev =
 501                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 502
 503         return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
 504 }
 505 static DEVICE_ATTR_RO(hw_rev);
 506
 507 static ssize_t board_id_show(struct device *device,
 508                              struct device_attribute *attr, char *buf)
 509 {
 510         struct hfi1_ibdev *dev =
 511                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 512         struct hfi1_devdata *dd = dd_from_dev(dev);
 513         int ret;
 514
 515         if (!dd->boardname)
 516                 ret = -EINVAL;
 517         else
 518                 ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
 519         return ret;
 520 }
 521 static DEVICE_ATTR_RO(board_id);
 522
 523 static ssize_t boardversion_show(struct device *device,
 524                                  struct device_attribute *attr, char *buf)
 525 {
 526         struct hfi1_ibdev *dev =
 527                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 528         struct hfi1_devdata *dd = dd_from_dev(dev);
 529
 530         /* The string printed here is already newline-terminated. */
 531         return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
 532 }
 533 static DEVICE_ATTR_RO(boardversion);
 534
 535 static ssize_t nctxts_show(struct device *device,
 536                            struct device_attribute *attr, char *buf)
 537 {
 538         struct hfi1_ibdev *dev =
 539                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 540         struct hfi1_devdata *dd = dd_from_dev(dev);
 541
 542         /*
 543          * Return the smaller of send and receive contexts.
 544          * Normally, user level applications would require both a send
 545          * and a receive context, so returning the smaller of the two counts
 546          * give a more accurate picture of total contexts available.
 547          */
 548         return scnprintf(buf, PAGE_SIZE, "%u\n",
 549                          min(dd->num_user_contexts,
 550                              (u32)dd->sc_sizes[SC_USER].count));
 551 }
 552 static DEVICE_ATTR_RO(nctxts);
 553
 554 static ssize_t nfreectxts_show(struct device *device,
 555                                struct device_attribute *attr, char *buf)
 556 {
 557         struct hfi1_ibdev *dev =
 558                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 559         struct hfi1_devdata *dd = dd_from_dev(dev);
 560
 561         /* Return the number of free user ports (contexts) available. */
 562         return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
 563 }
 564 static DEVICE_ATTR_RO(nfreectxts);
 565
 566 static ssize_t serial_show(struct device *device,
 567                            struct device_attribute *attr, char *buf)
 568 {
 569         struct hfi1_ibdev *dev =
 570                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 571         struct hfi1_devdata *dd = dd_from_dev(dev);
 572
 573         return scnprintf(buf, PAGE_SIZE, "%s", dd->serial);
 574 }
 575 static DEVICE_ATTR_RO(serial);
 576
 577 static ssize_t chip_reset_store(struct device *device,
 578                                 struct device_attribute *attr, const char *buf,
 579                                 size_t count)
 580 {
 581         struct hfi1_ibdev *dev =
 582                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 583         struct hfi1_devdata *dd = dd_from_dev(dev);
 584         int ret;
 585
 586         if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
 587                 ret = -EINVAL;
 588                 goto bail;
 589         }
 590
 591         ret = hfi1_reset_device(dd->unit);
 592 bail:
 593         return ret < 0 ? ret : count;
 594 }
 595 static DEVICE_ATTR_WO(chip_reset);
 596
 597 /*
 598  * Convert the reported temperature from an integer (reported in
 599  * units of 0.25C) to a floating point number.
 600  */
 601 #define temp2str(temp, buf, size, idx)                                  \
 602         scnprintf((buf) + (idx), (size) - (idx), "%u.%02u ",            \
 603                               ((temp) >> 2), ((temp) & 0x3) * 25)
 604
 605 /*
 606  * Dump tempsense values, in decimal, to ease shell-scripts.
 607  */
 608 static ssize_t tempsense_show(struct device *device,
 609                               struct device_attribute *attr, char *buf)
 610 {
 611         struct hfi1_ibdev *dev =
 612                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 613         struct hfi1_devdata *dd = dd_from_dev(dev);
 614         struct hfi1_temp temp;
 615         int ret;
 616
 617         ret = hfi1_tempsense_rd(dd, &temp);
 618         if (!ret) {
 619                 int idx = 0;
 620
 621                 idx += temp2str(temp.curr, buf, PAGE_SIZE, idx);
 622                 idx += temp2str(temp.lo_lim, buf, PAGE_SIZE, idx);
 623                 idx += temp2str(temp.hi_lim, buf, PAGE_SIZE, idx);
 624                 idx += temp2str(temp.crit_lim, buf, PAGE_SIZE, idx);
 625                 idx += scnprintf(buf + idx, PAGE_SIZE - idx,
 626                                 "%u %u %u\n", temp.triggers & 0x1,
 627                                 temp.triggers & 0x2, temp.triggers & 0x4);
 628                 ret = idx;
 629         }
 630         return ret;
 631 }
 632 static DEVICE_ATTR_RO(tempsense);
 633
 634 /*
 635  * end of per-unit (or driver, in some cases, but replicated
 636  * per unit) functions
 637  */
 638
 639 /* start of per-unit file structures and support code */
 640 static struct attribute *hfi1_attributes[] = {
 641         &dev_attr_hw_rev.attr,
 642         &dev_attr_board_id.attr,
 643         &dev_attr_nctxts.attr,
 644         &dev_attr_nfreectxts.attr,
 645         &dev_attr_serial.attr,
 646         &dev_attr_boardversion.attr,
 647         &dev_attr_tempsense.attr,
 648         &dev_attr_chip_reset.attr,
 649         NULL,
 650 };
 651
 652 const struct attribute_group ib_hfi1_attr_group = {
 653         .attrs = hfi1_attributes,
 654 };
 655
 656 int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
 657                            struct kobject *kobj)
 658 {
 659         struct hfi1_pportdata *ppd;
 660         struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
 661         int ret;
 662
 663         if (!port_num || port_num > dd->num_pports) {
 664                 dd_dev_err(dd,
 665                            "Skipping infiniband class with invalid port %u\n",
 666                            port_num);
 667                 return -ENODEV;
 668         }
 669         ppd = &dd->pport[port_num - 1];
 670
 671         ret = kobject_init_and_add(&ppd->sc2vl_kobj, &hfi1_sc2vl_ktype, kobj,
 672                                    "sc2vl");
 673         if (ret) {
 674                 dd_dev_err(dd,
 675                            "Skipping sc2vl sysfs info, (err %d) port %u\n",
 676                            ret, port_num);
 677                 /*
 678                  * Based on the documentation for kobject_init_and_add(), the
 679                  * caller should call kobject_put even if this call fails.
 680                  */
 681                 goto bail_sc2vl;
 682         }
 683         kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);
 684
 685         ret = kobject_init_and_add(&ppd->sl2sc_kobj, &hfi1_sl2sc_ktype, kobj,
 686                                    "sl2sc");
 687         if (ret) {
 688                 dd_dev_err(dd,
 689                            "Skipping sl2sc sysfs info, (err %d) port %u\n",
 690                            ret, port_num);
 691                 goto bail_sl2sc;
 692         }
 693         kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);
 694
 695         ret = kobject_init_and_add(&ppd->vl2mtu_kobj, &hfi1_vl2mtu_ktype, kobj,
 696                                    "vl2mtu");
 697         if (ret) {
 698                 dd_dev_err(dd,
 699                            "Skipping vl2mtu sysfs info, (err %d) port %u\n",
 700                            ret, port_num);
 701                 goto bail_vl2mtu;
 702         }
 703         kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);
 704
 705         ret = kobject_init_and_add(&ppd->pport_cc_kobj, &port_cc_ktype,
 706                                    kobj, "CCMgtA");
 707         if (ret) {
 708                 dd_dev_err(dd,
 709                            "Skipping Congestion Control sysfs info, (err %d) port %u\n",
 710                            ret, port_num);
 711                 goto bail_cc;
 712         }
 713
 714         kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
 715
 716         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
 717         if (ret) {
 718                 dd_dev_err(dd,
 719                            "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
 720                            ret, port_num);
 721                 goto bail_cc;
 722         }
 723
 724         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_table_bin_attr);
 725         if (ret) {
 726                 dd_dev_err(dd,
 727                            "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
 728                            ret, port_num);
 729                 goto bail_cc_entry_bin;
 730         }
 731
 732         dd_dev_info(dd,
 733                     "Congestion Control Agent enabled for port %d\n",
 734                     port_num);
 735
 736         return 0;
 737
 738 bail_cc_entry_bin:
 739         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 740                               &cc_setting_bin_attr);
 741 bail_cc:
 742         kobject_put(&ppd->pport_cc_kobj);
 743 bail_vl2mtu:
 744         kobject_put(&ppd->vl2mtu_kobj);
 745 bail_sl2sc:
 746         kobject_put(&ppd->sl2sc_kobj);
 747 bail_sc2vl:
 748         kobject_put(&ppd->sc2vl_kobj);
 749         return ret;
 750 }
 751
 752 struct sde_attribute {
 753         struct attribute attr;
 754         ssize_t (*show)(struct sdma_engine *sde, char *buf);
 755         ssize_t (*store)(struct sdma_engine *sde, const char *buf, size_t cnt);
 756 };
 757
 758 static ssize_t sde_show(struct kobject *kobj, struct attribute *attr, char *buf)
 759 {
 760         struct sde_attribute *sde_attr =
 761                 container_of(attr, struct sde_attribute, attr);
 762         struct sdma_engine *sde =
 763                 container_of(kobj, struct sdma_engine, kobj);
 764
 765         if (!sde_attr->show)
 766                 return -EINVAL;
 767
 768         return sde_attr->show(sde, buf);
 769 }
 770
 771 static ssize_t sde_store(struct kobject *kobj, struct attribute *attr,
 772                          const char *buf, size_t count)
 773 {
 774         struct sde_attribute *sde_attr =
 775                 container_of(attr, struct sde_attribute, attr);
 776         struct sdma_engine *sde =
 777                 container_of(kobj, struct sdma_engine, kobj);
 778
 779         if (!capable(CAP_SYS_ADMIN))
 780                 return -EPERM;
 781
 782         if (!sde_attr->store)
 783                 return -EINVAL;
 784
 785         return sde_attr->store(sde, buf, count);
 786 }
 787
 788 static const struct sysfs_ops sde_sysfs_ops = {
 789         .show = sde_show,
 790         .store = sde_store,
 791 };
 792
 793 static struct kobj_type sde_ktype = {
 794         .sysfs_ops = &sde_sysfs_ops,
 795 };
 796
 797 #define SDE_ATTR(_name, _mode, _show, _store) \
 798         struct sde_attribute sde_attr_##_name = \
 799                 __ATTR(_name, _mode, _show, _store)
 800
 801 static ssize_t sde_show_cpu_to_sde_map(struct sdma_engine *sde, char *buf)
 802 {
 803         return sdma_get_cpu_to_sde_map(sde, buf);
 804 }
 805
 806 static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
 807                                         const char *buf, size_t count)
 808 {
 809         return sdma_set_cpu_to_sde_map(sde, buf, count);
 810 }
 811
 812 static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
 813 {
 814         int vl;
 815
 816         vl = sdma_engine_get_vl(sde);
 817         if (vl < 0)
 818                 return vl;
 819
 820         return snprintf(buf, PAGE_SIZE, "%d\n", vl);
 821 }
 822
 823 static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
 824                 sde_show_cpu_to_sde_map,
 825                 sde_store_cpu_to_sde_map);
 826 static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);
 827
 828 static struct sde_attribute *sde_attribs[] = {
 829         &sde_attr_cpu_list,
 830         &sde_attr_vl
 831 };
 832
 833 /*
 834  * Register and create our files in /sys/class/infiniband.
 835  */
 836 int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
 837 {
 838         struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
 839         struct device *class_dev = &dev->dev;
 840         int i, j, ret;
 841
 842         for (i = 0; i < dd->num_sdma; i++) {
 843                 ret = kobject_init_and_add(&dd->per_sdma[i].kobj,
 844                                            &sde_ktype, &class_dev->kobj,
 845                                            "sdma%d", i);
 846                 if (ret)
 847                         goto bail;
 848
 849                 for (j = 0; j < ARRAY_SIZE(sde_attribs); j++) {
 850                         ret = sysfs_create_file(&dd->per_sdma[i].kobj,
 851                                                 &sde_attribs[j]->attr);
 852                         if (ret)
 853                                 goto bail;
 854                 }
 855         }
 856
 857         return 0;
 858 bail:
 859         /*
 860          * The function kobject_put() will call kobject_del() if the kobject
 861          * has been added successfully. The sysfs files created under the
 862          * kobject directory will also be removed during the process.
 863          */
 864         for (; i >= 0; i--)
 865                 kobject_put(&dd->per_sdma[i].kobj);
 866
 867         return ret;
 868 }
 869
 870 /*
 871  * Unregister and remove our files in /sys/class/infiniband.
 872  */
 873 void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
 874 {
 875         struct hfi1_pportdata *ppd;
 876         int i;
 877
 878         /* Unwind operations in hfi1_verbs_register_sysfs() */
 879         for (i = 0; i < dd->num_sdma; i++)
 880                 kobject_put(&dd->per_sdma[i].kobj);
 881
 882         for (i = 0; i < dd->num_pports; i++) {
 883                 ppd = &dd->pport[i];
 884
 885                 sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 886                                       &cc_setting_bin_attr);
 887                 sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 888                                       &cc_table_bin_attr);
 889                 kobject_put(&ppd->pport_cc_kobj);
 890                 kobject_put(&ppd->vl2mtu_kobj);
 891                 kobject_put(&ppd->sl2sc_kobj);
 892                 kobject_put(&ppd->sc2vl_kobj);
 893         }
 894 }