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 sysfs_emit(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 sysfs_emit(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 sysfs_emit(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 sysfs_emit(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 sysfs_emit(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
 514         if (!dd->boardname)
 515                 return -EINVAL;
 516
 517         return sysfs_emit(buf, "%s\n", dd->boardname);
 518 }
 519 static DEVICE_ATTR_RO(board_id);
 520
 521 static ssize_t boardversion_show(struct device *device,
 522                                  struct device_attribute *attr, char *buf)
 523 {
 524         struct hfi1_ibdev *dev =
 525                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 526         struct hfi1_devdata *dd = dd_from_dev(dev);
 527
 528         /* The string printed here is already newline-terminated. */
 529         return sysfs_emit(buf, "%s", dd->boardversion);
 530 }
 531 static DEVICE_ATTR_RO(boardversion);
 532
 533 static ssize_t nctxts_show(struct device *device,
 534                            struct device_attribute *attr, char *buf)
 535 {
 536         struct hfi1_ibdev *dev =
 537                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 538         struct hfi1_devdata *dd = dd_from_dev(dev);
 539
 540         /*
 541          * Return the smaller of send and receive contexts.
 542          * Normally, user level applications would require both a send
 543          * and a receive context, so returning the smaller of the two counts
 544          * give a more accurate picture of total contexts available.
 545          */
 546         return sysfs_emit(buf, "%u\n",
 547                           min(dd->num_user_contexts,
 548                               (u32)dd->sc_sizes[SC_USER].count));
 549 }
 550 static DEVICE_ATTR_RO(nctxts);
 551
 552 static ssize_t nfreectxts_show(struct device *device,
 553                                struct device_attribute *attr, char *buf)
 554 {
 555         struct hfi1_ibdev *dev =
 556                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 557         struct hfi1_devdata *dd = dd_from_dev(dev);
 558
 559         /* Return the number of free user ports (contexts) available. */
 560         return sysfs_emit(buf, "%u\n", dd->freectxts);
 561 }
 562 static DEVICE_ATTR_RO(nfreectxts);
 563
 564 static ssize_t serial_show(struct device *device,
 565                            struct device_attribute *attr, char *buf)
 566 {
 567         struct hfi1_ibdev *dev =
 568                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 569         struct hfi1_devdata *dd = dd_from_dev(dev);
 570
 571         /* dd->serial is already newline terminated in chip.c */
 572         return sysfs_emit(buf, "%s", dd->serial);
 573 }
 574 static DEVICE_ATTR_RO(serial);
 575
 576 static ssize_t chip_reset_store(struct device *device,
 577                                 struct device_attribute *attr, const char *buf,
 578                                 size_t count)
 579 {
 580         struct hfi1_ibdev *dev =
 581                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 582         struct hfi1_devdata *dd = dd_from_dev(dev);
 583         int ret;
 584
 585         if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
 586                 ret = -EINVAL;
 587                 goto bail;
 588         }
 589
 590         ret = hfi1_reset_device(dd->unit);
 591 bail:
 592         return ret < 0 ? ret : count;
 593 }
 594 static DEVICE_ATTR_WO(chip_reset);
 595
 596 /*
 597  * Convert the reported temperature from an integer (reported in
 598  * units of 0.25C) to a floating point number.
 599  */
 600 #define temp_d(t) ((t) >> 2)
 601 #define temp_f(t) (((t)&0x3) * 25u)
 602
 603 /*
 604  * Dump tempsense values, in decimal, to ease shell-scripts.
 605  */
 606 static ssize_t tempsense_show(struct device *device,
 607                               struct device_attribute *attr, char *buf)
 608 {
 609         struct hfi1_ibdev *dev =
 610                 rdma_device_to_drv_device(device, struct hfi1_ibdev, rdi.ibdev);
 611         struct hfi1_devdata *dd = dd_from_dev(dev);
 612         struct hfi1_temp temp;
 613         int ret;
 614
 615         ret = hfi1_tempsense_rd(dd, &temp);
 616         if (ret)
 617                 return ret;
 618
 619         return sysfs_emit(buf, "%u.%02u %u.%02u %u.%02u %u.%02u %u %u %u\n",
 620                           temp_d(temp.curr), temp_f(temp.curr),
 621                           temp_d(temp.lo_lim), temp_f(temp.lo_lim),
 622                           temp_d(temp.hi_lim), temp_f(temp.hi_lim),
 623                           temp_d(temp.crit_lim), temp_f(temp.crit_lim),
 624                           temp.triggers & 0x1,
 625                           temp.triggers & 0x2,
 626                           temp.triggers & 0x4);
 627 }
 628 static DEVICE_ATTR_RO(tempsense);
 629
 630 /*
 631  * end of per-unit (or driver, in some cases, but replicated
 632  * per unit) functions
 633  */
 634
 635 /* start of per-unit file structures and support code */
 636 static struct attribute *hfi1_attributes[] = {
 637         &dev_attr_hw_rev.attr,
 638         &dev_attr_board_id.attr,
 639         &dev_attr_nctxts.attr,
 640         &dev_attr_nfreectxts.attr,
 641         &dev_attr_serial.attr,
 642         &dev_attr_boardversion.attr,
 643         &dev_attr_tempsense.attr,
 644         &dev_attr_chip_reset.attr,
 645         NULL,
 646 };
 647
 648 const struct attribute_group ib_hfi1_attr_group = {
 649         .attrs = hfi1_attributes,
 650 };
 651
 652 int hfi1_create_port_files(struct ib_device *ibdev, u8 port_num,
 653                            struct kobject *kobj)
 654 {
 655         struct hfi1_pportdata *ppd;
 656         struct hfi1_devdata *dd = dd_from_ibdev(ibdev);
 657         int ret;
 658
 659         if (!port_num || port_num > dd->num_pports) {
 660                 dd_dev_err(dd,
 661                            "Skipping infiniband class with invalid port %u\n",
 662                            port_num);
 663                 return -ENODEV;
 664         }
 665         ppd = &dd->pport[port_num - 1];
 666
 667         ret = kobject_init_and_add(&ppd->sc2vl_kobj, &hfi1_sc2vl_ktype, kobj,
 668                                    "sc2vl");
 669         if (ret) {
 670                 dd_dev_err(dd,
 671                            "Skipping sc2vl sysfs info, (err %d) port %u\n",
 672                            ret, port_num);
 673                 /*
 674                  * Based on the documentation for kobject_init_and_add(), the
 675                  * caller should call kobject_put even if this call fails.
 676                  */
 677                 goto bail_sc2vl;
 678         }
 679         kobject_uevent(&ppd->sc2vl_kobj, KOBJ_ADD);
 680
 681         ret = kobject_init_and_add(&ppd->sl2sc_kobj, &hfi1_sl2sc_ktype, kobj,
 682                                    "sl2sc");
 683         if (ret) {
 684                 dd_dev_err(dd,
 685                            "Skipping sl2sc sysfs info, (err %d) port %u\n",
 686                            ret, port_num);
 687                 goto bail_sl2sc;
 688         }
 689         kobject_uevent(&ppd->sl2sc_kobj, KOBJ_ADD);
 690
 691         ret = kobject_init_and_add(&ppd->vl2mtu_kobj, &hfi1_vl2mtu_ktype, kobj,
 692                                    "vl2mtu");
 693         if (ret) {
 694                 dd_dev_err(dd,
 695                            "Skipping vl2mtu sysfs info, (err %d) port %u\n",
 696                            ret, port_num);
 697                 goto bail_vl2mtu;
 698         }
 699         kobject_uevent(&ppd->vl2mtu_kobj, KOBJ_ADD);
 700
 701         ret = kobject_init_and_add(&ppd->pport_cc_kobj, &port_cc_ktype,
 702                                    kobj, "CCMgtA");
 703         if (ret) {
 704                 dd_dev_err(dd,
 705                            "Skipping Congestion Control sysfs info, (err %d) port %u\n",
 706                            ret, port_num);
 707                 goto bail_cc;
 708         }
 709
 710         kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);
 711
 712         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
 713         if (ret) {
 714                 dd_dev_err(dd,
 715                            "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
 716                            ret, port_num);
 717                 goto bail_cc;
 718         }
 719
 720         ret = sysfs_create_bin_file(&ppd->pport_cc_kobj, &cc_table_bin_attr);
 721         if (ret) {
 722                 dd_dev_err(dd,
 723                            "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
 724                            ret, port_num);
 725                 goto bail_cc_entry_bin;
 726         }
 727
 728         dd_dev_info(dd,
 729                     "Congestion Control Agent enabled for port %d\n",
 730                     port_num);
 731
 732         return 0;
 733
 734 bail_cc_entry_bin:
 735         sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 736                               &cc_setting_bin_attr);
 737 bail_cc:
 738         kobject_put(&ppd->pport_cc_kobj);
 739 bail_vl2mtu:
 740         kobject_put(&ppd->vl2mtu_kobj);
 741 bail_sl2sc:
 742         kobject_put(&ppd->sl2sc_kobj);
 743 bail_sc2vl:
 744         kobject_put(&ppd->sc2vl_kobj);
 745         return ret;
 746 }
 747
 748 struct sde_attribute {
 749         struct attribute attr;
 750         ssize_t (*show)(struct sdma_engine *sde, char *buf);
 751         ssize_t (*store)(struct sdma_engine *sde, const char *buf, size_t cnt);
 752 };
 753
 754 static ssize_t sde_show(struct kobject *kobj, struct attribute *attr, char *buf)
 755 {
 756         struct sde_attribute *sde_attr =
 757                 container_of(attr, struct sde_attribute, attr);
 758         struct sdma_engine *sde =
 759                 container_of(kobj, struct sdma_engine, kobj);
 760
 761         if (!sde_attr->show)
 762                 return -EINVAL;
 763
 764         return sde_attr->show(sde, buf);
 765 }
 766
 767 static ssize_t sde_store(struct kobject *kobj, struct attribute *attr,
 768                          const char *buf, size_t count)
 769 {
 770         struct sde_attribute *sde_attr =
 771                 container_of(attr, struct sde_attribute, attr);
 772         struct sdma_engine *sde =
 773                 container_of(kobj, struct sdma_engine, kobj);
 774
 775         if (!capable(CAP_SYS_ADMIN))
 776                 return -EPERM;
 777
 778         if (!sde_attr->store)
 779                 return -EINVAL;
 780
 781         return sde_attr->store(sde, buf, count);
 782 }
 783
 784 static const struct sysfs_ops sde_sysfs_ops = {
 785         .show = sde_show,
 786         .store = sde_store,
 787 };
 788
 789 static struct kobj_type sde_ktype = {
 790         .sysfs_ops = &sde_sysfs_ops,
 791 };
 792
 793 #define SDE_ATTR(_name, _mode, _show, _store) \
 794         struct sde_attribute sde_attr_##_name = \
 795                 __ATTR(_name, _mode, _show, _store)
 796
 797 static ssize_t sde_show_cpu_to_sde_map(struct sdma_engine *sde, char *buf)
 798 {
 799         return sdma_get_cpu_to_sde_map(sde, buf);
 800 }
 801
 802 static ssize_t sde_store_cpu_to_sde_map(struct sdma_engine *sde,
 803                                         const char *buf, size_t count)
 804 {
 805         return sdma_set_cpu_to_sde_map(sde, buf, count);
 806 }
 807
 808 static ssize_t sde_show_vl(struct sdma_engine *sde, char *buf)
 809 {
 810         int vl;
 811
 812         vl = sdma_engine_get_vl(sde);
 813         if (vl < 0)
 814                 return vl;
 815
 816         return sysfs_emit(buf, "%d\n", vl);
 817 }
 818
 819 static SDE_ATTR(cpu_list, S_IWUSR | S_IRUGO,
 820                 sde_show_cpu_to_sde_map,
 821                 sde_store_cpu_to_sde_map);
 822 static SDE_ATTR(vl, S_IRUGO, sde_show_vl, NULL);
 823
 824 static struct sde_attribute *sde_attribs[] = {
 825         &sde_attr_cpu_list,
 826         &sde_attr_vl
 827 };
 828
 829 /*
 830  * Register and create our files in /sys/class/infiniband.
 831  */
 832 int hfi1_verbs_register_sysfs(struct hfi1_devdata *dd)
 833 {
 834         struct ib_device *dev = &dd->verbs_dev.rdi.ibdev;
 835         struct device *class_dev = &dev->dev;
 836         int i, j, ret;
 837
 838         for (i = 0; i < dd->num_sdma; i++) {
 839                 ret = kobject_init_and_add(&dd->per_sdma[i].kobj,
 840                                            &sde_ktype, &class_dev->kobj,
 841                                            "sdma%d", i);
 842                 if (ret)
 843                         goto bail;
 844
 845                 for (j = 0; j < ARRAY_SIZE(sde_attribs); j++) {
 846                         ret = sysfs_create_file(&dd->per_sdma[i].kobj,
 847                                                 &sde_attribs[j]->attr);
 848                         if (ret)
 849                                 goto bail;
 850                 }
 851         }
 852
 853         return 0;
 854 bail:
 855         /*
 856          * The function kobject_put() will call kobject_del() if the kobject
 857          * has been added successfully. The sysfs files created under the
 858          * kobject directory will also be removed during the process.
 859          */
 860         for (; i >= 0; i--)
 861                 kobject_put(&dd->per_sdma[i].kobj);
 862
 863         return ret;
 864 }
 865
 866 /*
 867  * Unregister and remove our files in /sys/class/infiniband.
 868  */
 869 void hfi1_verbs_unregister_sysfs(struct hfi1_devdata *dd)
 870 {
 871         struct hfi1_pportdata *ppd;
 872         int i;
 873
 874         /* Unwind operations in hfi1_verbs_register_sysfs() */
 875         for (i = 0; i < dd->num_sdma; i++)
 876                 kobject_put(&dd->per_sdma[i].kobj);
 877
 878         for (i = 0; i < dd->num_pports; i++) {
 879                 ppd = &dd->pport[i];
 880
 881                 sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 882                                       &cc_setting_bin_attr);
 883                 sysfs_remove_bin_file(&ppd->pport_cc_kobj,
 884                                       &cc_table_bin_attr);
 885                 kobject_put(&ppd->pport_cc_kobj);
 886                 kobject_put(&ppd->vl2mtu_kobj);
 887                 kobject_put(&ppd->sl2sc_kobj);
 888                 kobject_put(&ppd->sc2vl_kobj);
 889         }
 890 }