drivers/dma/idxd/sysfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2019 Intel Corporation. All rights rsvd. */
   3 #include <linux/init.h>
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/pci.h>
   7 #include <linux/device.h>
   8 #include <linux/io-64-nonatomic-lo-hi.h>
   9 #include <uapi/linux/idxd.h>
  10 #include "registers.h"
  11 #include "idxd.h"
  12
  13 static char *idxd_wq_type_names[] = {
  14         [IDXD_WQT_NONE]         = "none",
  15         [IDXD_WQT_KERNEL]       = "kernel",
  16         [IDXD_WQT_USER]         = "user",
  17 };
  18
  19 /* IDXD engine attributes */
  20 static ssize_t engine_group_id_show(struct device *dev,
  21                                     struct device_attribute *attr, char *buf)
  22 {
  23         struct idxd_engine *engine = confdev_to_engine(dev);
  24
  25         if (engine->group)
  26                 return sysfs_emit(buf, "%d\n", engine->group->id);
  27         else
  28                 return sysfs_emit(buf, "%d\n", -1);
  29 }
  30
  31 static ssize_t engine_group_id_store(struct device *dev,
  32                                      struct device_attribute *attr,
  33                                      const char *buf, size_t count)
  34 {
  35         struct idxd_engine *engine = confdev_to_engine(dev);
  36         struct idxd_device *idxd = engine->idxd;
  37         long id;
  38         int rc;
  39         struct idxd_group *prevg;
  40
  41         rc = kstrtol(buf, 10, &id);
  42         if (rc < 0)
  43                 return -EINVAL;
  44
  45         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
  46                 return -EPERM;
  47
  48         if (id > idxd->max_groups - 1 || id < -1)
  49                 return -EINVAL;
  50
  51         if (id == -1) {
  52                 if (engine->group) {
  53                         engine->group->num_engines--;
  54                         engine->group = NULL;
  55                 }
  56                 return count;
  57         }
  58
  59         prevg = engine->group;
  60
  61         if (prevg)
  62                 prevg->num_engines--;
  63         engine->group = idxd->groups[id];
  64         engine->group->num_engines++;
  65
  66         return count;
  67 }
  68
  69 static struct device_attribute dev_attr_engine_group =
  70                 __ATTR(group_id, 0644, engine_group_id_show,
  71                        engine_group_id_store);
  72
  73 static struct attribute *idxd_engine_attributes[] = {
  74         &dev_attr_engine_group.attr,
  75         NULL,
  76 };
  77
  78 static const struct attribute_group idxd_engine_attribute_group = {
  79         .attrs = idxd_engine_attributes,
  80 };
  81
  82 static const struct attribute_group *idxd_engine_attribute_groups[] = {
  83         &idxd_engine_attribute_group,
  84         NULL,
  85 };
  86
  87 static void idxd_conf_engine_release(struct device *dev)
  88 {
  89         struct idxd_engine *engine = confdev_to_engine(dev);
  90
  91         kfree(engine);
  92 }
  93
  94 struct device_type idxd_engine_device_type = {
  95         .name = "engine",
  96         .release = idxd_conf_engine_release,
  97         .groups = idxd_engine_attribute_groups,
  98 };
  99
 100 /* Group attributes */
 101
 102 static void idxd_set_free_rdbufs(struct idxd_device *idxd)
 103 {
 104         int i, rdbufs;
 105
 106         for (i = 0, rdbufs = 0; i < idxd->max_groups; i++) {
 107                 struct idxd_group *g = idxd->groups[i];
 108
 109                 rdbufs += g->rdbufs_reserved;
 110         }
 111
 112         idxd->nr_rdbufs = idxd->max_rdbufs - rdbufs;
 113 }
 114
 115 static ssize_t group_read_buffers_reserved_show(struct device *dev,
 116                                                 struct device_attribute *attr,
 117                                                 char *buf)
 118 {
 119         struct idxd_group *group = confdev_to_group(dev);
 120
 121         return sysfs_emit(buf, "%u\n", group->rdbufs_reserved);
 122 }
 123
 124 static ssize_t group_tokens_reserved_show(struct device *dev,
 125                                           struct device_attribute *attr,
 126                                           char *buf)
 127 {
 128         dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
 129         return group_read_buffers_reserved_show(dev, attr, buf);
 130 }
 131
 132 static ssize_t group_read_buffers_reserved_store(struct device *dev,
 133                                                  struct device_attribute *attr,
 134                                                  const char *buf, size_t count)
 135 {
 136         struct idxd_group *group = confdev_to_group(dev);
 137         struct idxd_device *idxd = group->idxd;
 138         unsigned long val;
 139         int rc;
 140
 141         rc = kstrtoul(buf, 10, &val);
 142         if (rc < 0)
 143                 return -EINVAL;
 144
 145         if (idxd->data->type == IDXD_TYPE_IAX)
 146                 return -EOPNOTSUPP;
 147
 148         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 149                 return -EPERM;
 150
 151         if (idxd->state == IDXD_DEV_ENABLED)
 152                 return -EPERM;
 153
 154         if (val > idxd->max_rdbufs)
 155                 return -EINVAL;
 156
 157         if (val > idxd->nr_rdbufs + group->rdbufs_reserved)
 158                 return -EINVAL;
 159
 160         group->rdbufs_reserved = val;
 161         idxd_set_free_rdbufs(idxd);
 162         return count;
 163 }
 164
 165 static ssize_t group_tokens_reserved_store(struct device *dev,
 166                                            struct device_attribute *attr,
 167                                            const char *buf, size_t count)
 168 {
 169         dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
 170         return group_read_buffers_reserved_store(dev, attr, buf, count);
 171 }
 172
 173 static struct device_attribute dev_attr_group_tokens_reserved =
 174                 __ATTR(tokens_reserved, 0644, group_tokens_reserved_show,
 175                        group_tokens_reserved_store);
 176
 177 static struct device_attribute dev_attr_group_read_buffers_reserved =
 178                 __ATTR(read_buffers_reserved, 0644, group_read_buffers_reserved_show,
 179                        group_read_buffers_reserved_store);
 180
 181 static ssize_t group_read_buffers_allowed_show(struct device *dev,
 182                                                struct device_attribute *attr,
 183                                                char *buf)
 184 {
 185         struct idxd_group *group = confdev_to_group(dev);
 186
 187         return sysfs_emit(buf, "%u\n", group->rdbufs_allowed);
 188 }
 189
 190 static ssize_t group_tokens_allowed_show(struct device *dev,
 191                                          struct device_attribute *attr,
 192                                          char *buf)
 193 {
 194         dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
 195         return group_read_buffers_allowed_show(dev, attr, buf);
 196 }
 197
 198 static ssize_t group_read_buffers_allowed_store(struct device *dev,
 199                                                 struct device_attribute *attr,
 200                                                 const char *buf, size_t count)
 201 {
 202         struct idxd_group *group = confdev_to_group(dev);
 203         struct idxd_device *idxd = group->idxd;
 204         unsigned long val;
 205         int rc;
 206
 207         rc = kstrtoul(buf, 10, &val);
 208         if (rc < 0)
 209                 return -EINVAL;
 210
 211         if (idxd->data->type == IDXD_TYPE_IAX)
 212                 return -EOPNOTSUPP;
 213
 214         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 215                 return -EPERM;
 216
 217         if (idxd->state == IDXD_DEV_ENABLED)
 218                 return -EPERM;
 219
 220         if (val < 4 * group->num_engines ||
 221             val > group->rdbufs_reserved + idxd->nr_rdbufs)
 222                 return -EINVAL;
 223
 224         group->rdbufs_allowed = val;
 225         return count;
 226 }
 227
 228 static ssize_t group_tokens_allowed_store(struct device *dev,
 229                                           struct device_attribute *attr,
 230                                           const char *buf, size_t count)
 231 {
 232         dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
 233         return group_read_buffers_allowed_store(dev, attr, buf, count);
 234 }
 235
 236 static struct device_attribute dev_attr_group_tokens_allowed =
 237                 __ATTR(tokens_allowed, 0644, group_tokens_allowed_show,
 238                        group_tokens_allowed_store);
 239
 240 static struct device_attribute dev_attr_group_read_buffers_allowed =
 241                 __ATTR(read_buffers_allowed, 0644, group_read_buffers_allowed_show,
 242                        group_read_buffers_allowed_store);
 243
 244 static ssize_t group_use_read_buffer_limit_show(struct device *dev,
 245                                                 struct device_attribute *attr,
 246                                                 char *buf)
 247 {
 248         struct idxd_group *group = confdev_to_group(dev);
 249
 250         return sysfs_emit(buf, "%u\n", group->use_rdbuf_limit);
 251 }
 252
 253 static ssize_t group_use_token_limit_show(struct device *dev,
 254                                           struct device_attribute *attr,
 255                                           char *buf)
 256 {
 257         dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n");
 258         return group_use_read_buffer_limit_show(dev, attr, buf);
 259 }
 260
 261 static ssize_t group_use_read_buffer_limit_store(struct device *dev,
 262                                                  struct device_attribute *attr,
 263                                                  const char *buf, size_t count)
 264 {
 265         struct idxd_group *group = confdev_to_group(dev);
 266         struct idxd_device *idxd = group->idxd;
 267         unsigned long val;
 268         int rc;
 269
 270         rc = kstrtoul(buf, 10, &val);
 271         if (rc < 0)
 272                 return -EINVAL;
 273
 274         if (idxd->data->type == IDXD_TYPE_IAX)
 275                 return -EOPNOTSUPP;
 276
 277         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 278                 return -EPERM;
 279
 280         if (idxd->state == IDXD_DEV_ENABLED)
 281                 return -EPERM;
 282
 283         if (idxd->rdbuf_limit == 0)
 284                 return -EPERM;
 285
 286         group->use_rdbuf_limit = !!val;
 287         return count;
 288 }
 289
 290 static ssize_t group_use_token_limit_store(struct device *dev,
 291                                            struct device_attribute *attr,
 292                                            const char *buf, size_t count)
 293 {
 294         dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n");
 295         return group_use_read_buffer_limit_store(dev, attr, buf, count);
 296 }
 297
 298 static struct device_attribute dev_attr_group_use_token_limit =
 299                 __ATTR(use_token_limit, 0644, group_use_token_limit_show,
 300                        group_use_token_limit_store);
 301
 302 static struct device_attribute dev_attr_group_use_read_buffer_limit =
 303                 __ATTR(use_read_buffer_limit, 0644, group_use_read_buffer_limit_show,
 304                        group_use_read_buffer_limit_store);
 305
 306 static ssize_t group_engines_show(struct device *dev,
 307                                   struct device_attribute *attr, char *buf)
 308 {
 309         struct idxd_group *group = confdev_to_group(dev);
 310         int i, rc = 0;
 311         struct idxd_device *idxd = group->idxd;
 312
 313         for (i = 0; i < idxd->max_engines; i++) {
 314                 struct idxd_engine *engine = idxd->engines[i];
 315
 316                 if (!engine->group)
 317                         continue;
 318
 319                 if (engine->group->id == group->id)
 320                         rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id);
 321         }
 322
 323         if (!rc)
 324                 return 0;
 325         rc--;
 326         rc += sysfs_emit_at(buf, rc, "\n");
 327
 328         return rc;
 329 }
 330
 331 static struct device_attribute dev_attr_group_engines =
 332                 __ATTR(engines, 0444, group_engines_show, NULL);
 333
 334 static ssize_t group_work_queues_show(struct device *dev,
 335                                       struct device_attribute *attr, char *buf)
 336 {
 337         struct idxd_group *group = confdev_to_group(dev);
 338         int i, rc = 0;
 339         struct idxd_device *idxd = group->idxd;
 340
 341         for (i = 0; i < idxd->max_wqs; i++) {
 342                 struct idxd_wq *wq = idxd->wqs[i];
 343
 344                 if (!wq->group)
 345                         continue;
 346
 347                 if (wq->group->id == group->id)
 348                         rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id);
 349         }
 350
 351         if (!rc)
 352                 return 0;
 353         rc--;
 354         rc += sysfs_emit_at(buf, rc, "\n");
 355
 356         return rc;
 357 }
 358
 359 static struct device_attribute dev_attr_group_work_queues =
 360                 __ATTR(work_queues, 0444, group_work_queues_show, NULL);
 361
 362 static ssize_t group_traffic_class_a_show(struct device *dev,
 363                                           struct device_attribute *attr,
 364                                           char *buf)
 365 {
 366         struct idxd_group *group = confdev_to_group(dev);
 367
 368         return sysfs_emit(buf, "%d\n", group->tc_a);
 369 }
 370
 371 static ssize_t group_traffic_class_a_store(struct device *dev,
 372                                            struct device_attribute *attr,
 373                                            const char *buf, size_t count)
 374 {
 375         struct idxd_group *group = confdev_to_group(dev);
 376         struct idxd_device *idxd = group->idxd;
 377         long val;
 378         int rc;
 379
 380         rc = kstrtol(buf, 10, &val);
 381         if (rc < 0)
 382                 return -EINVAL;
 383
 384         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 385                 return -EPERM;
 386
 387         if (idxd->state == IDXD_DEV_ENABLED)
 388                 return -EPERM;
 389
 390         if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override)
 391                 return -EPERM;
 392
 393         if (val < 0 || val > 7)
 394                 return -EINVAL;
 395
 396         group->tc_a = val;
 397         return count;
 398 }
 399
 400 static struct device_attribute dev_attr_group_traffic_class_a =
 401                 __ATTR(traffic_class_a, 0644, group_traffic_class_a_show,
 402                        group_traffic_class_a_store);
 403
 404 static ssize_t group_traffic_class_b_show(struct device *dev,
 405                                           struct device_attribute *attr,
 406                                           char *buf)
 407 {
 408         struct idxd_group *group = confdev_to_group(dev);
 409
 410         return sysfs_emit(buf, "%d\n", group->tc_b);
 411 }
 412
 413 static ssize_t group_traffic_class_b_store(struct device *dev,
 414                                            struct device_attribute *attr,
 415                                            const char *buf, size_t count)
 416 {
 417         struct idxd_group *group = confdev_to_group(dev);
 418         struct idxd_device *idxd = group->idxd;
 419         long val;
 420         int rc;
 421
 422         rc = kstrtol(buf, 10, &val);
 423         if (rc < 0)
 424                 return -EINVAL;
 425
 426         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 427                 return -EPERM;
 428
 429         if (idxd->state == IDXD_DEV_ENABLED)
 430                 return -EPERM;
 431
 432         if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override)
 433                 return -EPERM;
 434
 435         if (val < 0 || val > 7)
 436                 return -EINVAL;
 437
 438         group->tc_b = val;
 439         return count;
 440 }
 441
 442 static struct device_attribute dev_attr_group_traffic_class_b =
 443                 __ATTR(traffic_class_b, 0644, group_traffic_class_b_show,
 444                        group_traffic_class_b_store);
 445
 446 static ssize_t group_desc_progress_limit_show(struct device *dev,
 447                                               struct device_attribute *attr,
 448                                               char *buf)
 449 {
 450         struct idxd_group *group = confdev_to_group(dev);
 451
 452         return sysfs_emit(buf, "%d\n", group->desc_progress_limit);
 453 }
 454
 455 static ssize_t group_desc_progress_limit_store(struct device *dev,
 456                                                struct device_attribute *attr,
 457                                                const char *buf, size_t count)
 458 {
 459         struct idxd_group *group = confdev_to_group(dev);
 460         int val, rc;
 461
 462         rc = kstrtoint(buf, 10, &val);
 463         if (rc < 0)
 464                 return -EINVAL;
 465
 466         if (val & ~GENMASK(1, 0))
 467                 return -EINVAL;
 468
 469         group->desc_progress_limit = val;
 470         return count;
 471 }
 472
 473 static struct device_attribute dev_attr_group_desc_progress_limit =
 474                 __ATTR(desc_progress_limit, 0644, group_desc_progress_limit_show,
 475                        group_desc_progress_limit_store);
 476
 477 static ssize_t group_batch_progress_limit_show(struct device *dev,
 478                                                struct device_attribute *attr,
 479                                                char *buf)
 480 {
 481         struct idxd_group *group = confdev_to_group(dev);
 482
 483         return sysfs_emit(buf, "%d\n", group->batch_progress_limit);
 484 }
 485
 486 static ssize_t group_batch_progress_limit_store(struct device *dev,
 487                                                 struct device_attribute *attr,
 488                                                 const char *buf, size_t count)
 489 {
 490         struct idxd_group *group = confdev_to_group(dev);
 491         int val, rc;
 492
 493         rc = kstrtoint(buf, 10, &val);
 494         if (rc < 0)
 495                 return -EINVAL;
 496
 497         if (val & ~GENMASK(1, 0))
 498                 return -EINVAL;
 499
 500         group->batch_progress_limit = val;
 501         return count;
 502 }
 503
 504 static struct device_attribute dev_attr_group_batch_progress_limit =
 505                 __ATTR(batch_progress_limit, 0644, group_batch_progress_limit_show,
 506                        group_batch_progress_limit_store);
 507 static struct attribute *idxd_group_attributes[] = {
 508         &dev_attr_group_work_queues.attr,
 509         &dev_attr_group_engines.attr,
 510         &dev_attr_group_use_token_limit.attr,
 511         &dev_attr_group_use_read_buffer_limit.attr,
 512         &dev_attr_group_tokens_allowed.attr,
 513         &dev_attr_group_read_buffers_allowed.attr,
 514         &dev_attr_group_tokens_reserved.attr,
 515         &dev_attr_group_read_buffers_reserved.attr,
 516         &dev_attr_group_traffic_class_a.attr,
 517         &dev_attr_group_traffic_class_b.attr,
 518         &dev_attr_group_desc_progress_limit.attr,
 519         &dev_attr_group_batch_progress_limit.attr,
 520         NULL,
 521 };
 522
 523 static bool idxd_group_attr_progress_limit_invisible(struct attribute *attr,
 524                                                      struct idxd_device *idxd)
 525 {
 526         return (attr == &dev_attr_group_desc_progress_limit.attr ||
 527                 attr == &dev_attr_group_batch_progress_limit.attr) &&
 528                 !idxd->hw.group_cap.progress_limit;
 529 }
 530
 531 static bool idxd_group_attr_read_buffers_invisible(struct attribute *attr,
 532                                                    struct idxd_device *idxd)
 533 {
 534         /*
 535          * Intel IAA does not support Read Buffer allocation control,
 536          * make these attributes invisible.
 537          */
 538         return (attr == &dev_attr_group_use_token_limit.attr ||
 539                 attr == &dev_attr_group_use_read_buffer_limit.attr ||
 540                 attr == &dev_attr_group_tokens_allowed.attr ||
 541                 attr == &dev_attr_group_read_buffers_allowed.attr ||
 542                 attr == &dev_attr_group_tokens_reserved.attr ||
 543                 attr == &dev_attr_group_read_buffers_reserved.attr) &&
 544                 idxd->data->type == IDXD_TYPE_IAX;
 545 }
 546
 547 static umode_t idxd_group_attr_visible(struct kobject *kobj,
 548                                        struct attribute *attr, int n)
 549 {
 550         struct device *dev = container_of(kobj, struct device, kobj);
 551         struct idxd_group *group = confdev_to_group(dev);
 552         struct idxd_device *idxd = group->idxd;
 553
 554         if (idxd_group_attr_progress_limit_invisible(attr, idxd))
 555                 return 0;
 556
 557         if (idxd_group_attr_read_buffers_invisible(attr, idxd))
 558                 return 0;
 559
 560         return attr->mode;
 561 }
 562
 563 static const struct attribute_group idxd_group_attribute_group = {
 564         .attrs = idxd_group_attributes,
 565         .is_visible = idxd_group_attr_visible,
 566 };
 567
 568 static const struct attribute_group *idxd_group_attribute_groups[] = {
 569         &idxd_group_attribute_group,
 570         NULL,
 571 };
 572
 573 static void idxd_conf_group_release(struct device *dev)
 574 {
 575         struct idxd_group *group = confdev_to_group(dev);
 576
 577         kfree(group);
 578 }
 579
 580 struct device_type idxd_group_device_type = {
 581         .name = "group",
 582         .release = idxd_conf_group_release,
 583         .groups = idxd_group_attribute_groups,
 584 };
 585
 586 /* IDXD work queue attribs */
 587 static ssize_t wq_clients_show(struct device *dev,
 588                                struct device_attribute *attr, char *buf)
 589 {
 590         struct idxd_wq *wq = confdev_to_wq(dev);
 591
 592         return sysfs_emit(buf, "%d\n", wq->client_count);
 593 }
 594
 595 static struct device_attribute dev_attr_wq_clients =
 596                 __ATTR(clients, 0444, wq_clients_show, NULL);
 597
 598 static ssize_t wq_state_show(struct device *dev,
 599                              struct device_attribute *attr, char *buf)
 600 {
 601         struct idxd_wq *wq = confdev_to_wq(dev);
 602
 603         switch (wq->state) {
 604         case IDXD_WQ_DISABLED:
 605                 return sysfs_emit(buf, "disabled\n");
 606         case IDXD_WQ_ENABLED:
 607                 return sysfs_emit(buf, "enabled\n");
 608         }
 609
 610         return sysfs_emit(buf, "unknown\n");
 611 }
 612
 613 static struct device_attribute dev_attr_wq_state =
 614                 __ATTR(state, 0444, wq_state_show, NULL);
 615
 616 static ssize_t wq_group_id_show(struct device *dev,
 617                                 struct device_attribute *attr, char *buf)
 618 {
 619         struct idxd_wq *wq = confdev_to_wq(dev);
 620
 621         if (wq->group)
 622                 return sysfs_emit(buf, "%u\n", wq->group->id);
 623         else
 624                 return sysfs_emit(buf, "-1\n");
 625 }
 626
 627 static ssize_t wq_group_id_store(struct device *dev,
 628                                  struct device_attribute *attr,
 629                                  const char *buf, size_t count)
 630 {
 631         struct idxd_wq *wq = confdev_to_wq(dev);
 632         struct idxd_device *idxd = wq->idxd;
 633         long id;
 634         int rc;
 635         struct idxd_group *prevg, *group;
 636
 637         rc = kstrtol(buf, 10, &id);
 638         if (rc < 0)
 639                 return -EINVAL;
 640
 641         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 642                 return -EPERM;
 643
 644         if (wq->state != IDXD_WQ_DISABLED)
 645                 return -EPERM;
 646
 647         if (id > idxd->max_groups - 1 || id < -1)
 648                 return -EINVAL;
 649
 650         if (id == -1) {
 651                 if (wq->group) {
 652                         wq->group->num_wqs--;
 653                         wq->group = NULL;
 654                 }
 655                 return count;
 656         }
 657
 658         group = idxd->groups[id];
 659         prevg = wq->group;
 660
 661         if (prevg)
 662                 prevg->num_wqs--;
 663         wq->group = group;
 664         group->num_wqs++;
 665         return count;
 666 }
 667
 668 static struct device_attribute dev_attr_wq_group_id =
 669                 __ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store);
 670
 671 static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr,
 672                             char *buf)
 673 {
 674         struct idxd_wq *wq = confdev_to_wq(dev);
 675
 676         return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared");
 677 }
 678
 679 static ssize_t wq_mode_store(struct device *dev,
 680                              struct device_attribute *attr, const char *buf,
 681                              size_t count)
 682 {
 683         struct idxd_wq *wq = confdev_to_wq(dev);
 684         struct idxd_device *idxd = wq->idxd;
 685
 686         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 687                 return -EPERM;
 688
 689         if (wq->state != IDXD_WQ_DISABLED)
 690                 return -EPERM;
 691
 692         if (sysfs_streq(buf, "dedicated")) {
 693                 set_bit(WQ_FLAG_DEDICATED, &wq->flags);
 694                 wq->threshold = 0;
 695         } else if (sysfs_streq(buf, "shared")) {
 696                 clear_bit(WQ_FLAG_DEDICATED, &wq->flags);
 697         } else {
 698                 return -EINVAL;
 699         }
 700
 701         return count;
 702 }
 703
 704 static struct device_attribute dev_attr_wq_mode =
 705                 __ATTR(mode, 0644, wq_mode_show, wq_mode_store);
 706
 707 static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr,
 708                             char *buf)
 709 {
 710         struct idxd_wq *wq = confdev_to_wq(dev);
 711
 712         return sysfs_emit(buf, "%u\n", wq->size);
 713 }
 714
 715 static int total_claimed_wq_size(struct idxd_device *idxd)
 716 {
 717         int i;
 718         int wq_size = 0;
 719
 720         for (i = 0; i < idxd->max_wqs; i++) {
 721                 struct idxd_wq *wq = idxd->wqs[i];
 722
 723                 wq_size += wq->size;
 724         }
 725
 726         return wq_size;
 727 }
 728
 729 static ssize_t wq_size_store(struct device *dev,
 730                              struct device_attribute *attr, const char *buf,
 731                              size_t count)
 732 {
 733         struct idxd_wq *wq = confdev_to_wq(dev);
 734         unsigned long size;
 735         struct idxd_device *idxd = wq->idxd;
 736         int rc;
 737
 738         rc = kstrtoul(buf, 10, &size);
 739         if (rc < 0)
 740                 return -EINVAL;
 741
 742         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 743                 return -EPERM;
 744
 745         if (idxd->state == IDXD_DEV_ENABLED)
 746                 return -EPERM;
 747
 748         if (size + total_claimed_wq_size(idxd) - wq->size > idxd->max_wq_size)
 749                 return -EINVAL;
 750
 751         wq->size = size;
 752         return count;
 753 }
 754
 755 static struct device_attribute dev_attr_wq_size =
 756                 __ATTR(size, 0644, wq_size_show, wq_size_store);
 757
 758 static ssize_t wq_priority_show(struct device *dev,
 759                                 struct device_attribute *attr, char *buf)
 760 {
 761         struct idxd_wq *wq = confdev_to_wq(dev);
 762
 763         return sysfs_emit(buf, "%u\n", wq->priority);
 764 }
 765
 766 static ssize_t wq_priority_store(struct device *dev,
 767                                  struct device_attribute *attr,
 768                                  const char *buf, size_t count)
 769 {
 770         struct idxd_wq *wq = confdev_to_wq(dev);
 771         unsigned long prio;
 772         struct idxd_device *idxd = wq->idxd;
 773         int rc;
 774
 775         rc = kstrtoul(buf, 10, &prio);
 776         if (rc < 0)
 777                 return -EINVAL;
 778
 779         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 780                 return -EPERM;
 781
 782         if (wq->state != IDXD_WQ_DISABLED)
 783                 return -EPERM;
 784
 785         if (prio > IDXD_MAX_PRIORITY)
 786                 return -EINVAL;
 787
 788         wq->priority = prio;
 789         return count;
 790 }
 791
 792 static struct device_attribute dev_attr_wq_priority =
 793                 __ATTR(priority, 0644, wq_priority_show, wq_priority_store);
 794
 795 static ssize_t wq_block_on_fault_show(struct device *dev,
 796                                       struct device_attribute *attr, char *buf)
 797 {
 798         struct idxd_wq *wq = confdev_to_wq(dev);
 799
 800         return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags));
 801 }
 802
 803 static ssize_t wq_block_on_fault_store(struct device *dev,
 804                                        struct device_attribute *attr,
 805                                        const char *buf, size_t count)
 806 {
 807         struct idxd_wq *wq = confdev_to_wq(dev);
 808         struct idxd_device *idxd = wq->idxd;
 809         bool bof;
 810         int rc;
 811
 812         if (!idxd->hw.gen_cap.block_on_fault)
 813                 return -EOPNOTSUPP;
 814
 815         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 816                 return -EPERM;
 817
 818         if (wq->state != IDXD_WQ_DISABLED)
 819                 return -ENXIO;
 820
 821         rc = kstrtobool(buf, &bof);
 822         if (rc < 0)
 823                 return rc;
 824
 825         if (bof) {
 826                 if (test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags))
 827                         return -EOPNOTSUPP;
 828
 829                 set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
 830         } else {
 831                 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
 832         }
 833
 834         return count;
 835 }
 836
 837 static struct device_attribute dev_attr_wq_block_on_fault =
 838                 __ATTR(block_on_fault, 0644, wq_block_on_fault_show,
 839                        wq_block_on_fault_store);
 840
 841 static ssize_t wq_threshold_show(struct device *dev,
 842                                  struct device_attribute *attr, char *buf)
 843 {
 844         struct idxd_wq *wq = confdev_to_wq(dev);
 845
 846         return sysfs_emit(buf, "%u\n", wq->threshold);
 847 }
 848
 849 static ssize_t wq_threshold_store(struct device *dev,
 850                                   struct device_attribute *attr,
 851                                   const char *buf, size_t count)
 852 {
 853         struct idxd_wq *wq = confdev_to_wq(dev);
 854         struct idxd_device *idxd = wq->idxd;
 855         unsigned int val;
 856         int rc;
 857
 858         rc = kstrtouint(buf, 0, &val);
 859         if (rc < 0)
 860                 return -EINVAL;
 861
 862         if (val > wq->size || val <= 0)
 863                 return -EINVAL;
 864
 865         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 866                 return -EPERM;
 867
 868         if (wq->state != IDXD_WQ_DISABLED)
 869                 return -ENXIO;
 870
 871         if (test_bit(WQ_FLAG_DEDICATED, &wq->flags))
 872                 return -EINVAL;
 873
 874         wq->threshold = val;
 875
 876         return count;
 877 }
 878
 879 static struct device_attribute dev_attr_wq_threshold =
 880                 __ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store);
 881
 882 static ssize_t wq_type_show(struct device *dev,
 883                             struct device_attribute *attr, char *buf)
 884 {
 885         struct idxd_wq *wq = confdev_to_wq(dev);
 886
 887         switch (wq->type) {
 888         case IDXD_WQT_KERNEL:
 889                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]);
 890         case IDXD_WQT_USER:
 891                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
 892         case IDXD_WQT_NONE:
 893         default:
 894                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]);
 895         }
 896
 897         return -EINVAL;
 898 }
 899
 900 static ssize_t wq_type_store(struct device *dev,
 901                              struct device_attribute *attr, const char *buf,
 902                              size_t count)
 903 {
 904         struct idxd_wq *wq = confdev_to_wq(dev);
 905         enum idxd_wq_type old_type;
 906
 907         if (wq->state != IDXD_WQ_DISABLED)
 908                 return -EPERM;
 909
 910         old_type = wq->type;
 911         if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE]))
 912                 wq->type = IDXD_WQT_NONE;
 913         else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL]))
 914                 wq->type = IDXD_WQT_KERNEL;
 915         else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER]))
 916                 wq->type = IDXD_WQT_USER;
 917         else
 918                 return -EINVAL;
 919
 920         /* If we are changing queue type, clear the name */
 921         if (wq->type != old_type)
 922                 memset(wq->name, 0, WQ_NAME_SIZE + 1);
 923
 924         return count;
 925 }
 926
 927 static struct device_attribute dev_attr_wq_type =
 928                 __ATTR(type, 0644, wq_type_show, wq_type_store);
 929
 930 static ssize_t wq_name_show(struct device *dev,
 931                             struct device_attribute *attr, char *buf)
 932 {
 933         struct idxd_wq *wq = confdev_to_wq(dev);
 934
 935         return sysfs_emit(buf, "%s\n", wq->name);
 936 }
 937
 938 static ssize_t wq_name_store(struct device *dev,
 939                              struct device_attribute *attr, const char *buf,
 940                              size_t count)
 941 {
 942         struct idxd_wq *wq = confdev_to_wq(dev);
 943         char *input, *pos;
 944
 945         if (wq->state != IDXD_WQ_DISABLED)
 946                 return -EPERM;
 947
 948         if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0)
 949                 return -EINVAL;
 950
 951         /*
 952          * This is temporarily placed here until we have SVM support for
 953          * dmaengine.
 954          */
 955         if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd))
 956                 return -EOPNOTSUPP;
 957
 958         input = kstrndup(buf, count, GFP_KERNEL);
 959         if (!input)
 960                 return -ENOMEM;
 961
 962         pos = strim(input);
 963         memset(wq->name, 0, WQ_NAME_SIZE + 1);
 964         sprintf(wq->name, "%s", pos);
 965         kfree(input);
 966         return count;
 967 }
 968
 969 static struct device_attribute dev_attr_wq_name =
 970                 __ATTR(name, 0644, wq_name_show, wq_name_store);
 971
 972 static ssize_t wq_cdev_minor_show(struct device *dev,
 973                                   struct device_attribute *attr, char *buf)
 974 {
 975         struct idxd_wq *wq = confdev_to_wq(dev);
 976         int minor = -1;
 977
 978         mutex_lock(&wq->wq_lock);
 979         if (wq->idxd_cdev)
 980                 minor = wq->idxd_cdev->minor;
 981         mutex_unlock(&wq->wq_lock);
 982
 983         if (minor == -1)
 984                 return -ENXIO;
 985         return sysfs_emit(buf, "%d\n", minor);
 986 }
 987
 988 static struct device_attribute dev_attr_wq_cdev_minor =
 989                 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL);
 990
 991 static int __get_sysfs_u64(const char *buf, u64 *val)
 992 {
 993         int rc;
 994
 995         rc = kstrtou64(buf, 0, val);
 996         if (rc < 0)
 997                 return -EINVAL;
 998
 999         if (*val == 0)
1000                 return -EINVAL;
1001
1002         *val = roundup_pow_of_two(*val);
1003         return 0;
1004 }
1005
1006 static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr,
1007                                          char *buf)
1008 {
1009         struct idxd_wq *wq = confdev_to_wq(dev);
1010
1011         return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes);
1012 }
1013
1014 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr,
1015                                           const char *buf, size_t count)
1016 {
1017         struct idxd_wq *wq = confdev_to_wq(dev);
1018         struct idxd_device *idxd = wq->idxd;
1019         u64 xfer_size;
1020         int rc;
1021
1022         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1023                 return -EPERM;
1024
1025         if (wq->state != IDXD_WQ_DISABLED)
1026                 return -EPERM;
1027
1028         rc = __get_sysfs_u64(buf, &xfer_size);
1029         if (rc < 0)
1030                 return rc;
1031
1032         if (xfer_size > idxd->max_xfer_bytes)
1033                 return -EINVAL;
1034
1035         wq->max_xfer_bytes = xfer_size;
1036
1037         return count;
1038 }
1039
1040 static struct device_attribute dev_attr_wq_max_transfer_size =
1041                 __ATTR(max_transfer_size, 0644,
1042                        wq_max_transfer_size_show, wq_max_transfer_size_store);
1043
1044 static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf)
1045 {
1046         struct idxd_wq *wq = confdev_to_wq(dev);
1047
1048         return sysfs_emit(buf, "%u\n", wq->max_batch_size);
1049 }
1050
1051 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr,
1052                                        const char *buf, size_t count)
1053 {
1054         struct idxd_wq *wq = confdev_to_wq(dev);
1055         struct idxd_device *idxd = wq->idxd;
1056         u64 batch_size;
1057         int rc;
1058
1059         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1060                 return -EPERM;
1061
1062         if (wq->state != IDXD_WQ_DISABLED)
1063                 return -EPERM;
1064
1065         rc = __get_sysfs_u64(buf, &batch_size);
1066         if (rc < 0)
1067                 return rc;
1068
1069         if (batch_size > idxd->max_batch_size)
1070                 return -EINVAL;
1071
1072         idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size);
1073
1074         return count;
1075 }
1076
1077 static struct device_attribute dev_attr_wq_max_batch_size =
1078                 __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store);
1079
1080 static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf)
1081 {
1082         struct idxd_wq *wq = confdev_to_wq(dev);
1083
1084         return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags));
1085 }
1086
1087 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
1088                                     const char *buf, size_t count)
1089 {
1090         struct idxd_wq *wq = confdev_to_wq(dev);
1091         struct idxd_device *idxd = wq->idxd;
1092         bool ats_dis;
1093         int rc;
1094
1095         if (wq->state != IDXD_WQ_DISABLED)
1096                 return -EPERM;
1097
1098         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1099                 return -EPERM;
1100
1101         rc = kstrtobool(buf, &ats_dis);
1102         if (rc < 0)
1103                 return rc;
1104
1105         if (ats_dis)
1106                 set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1107         else
1108                 clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1109
1110         return count;
1111 }
1112
1113 static struct device_attribute dev_attr_wq_ats_disable =
1114                 __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store);
1115
1116 static ssize_t wq_prs_disable_show(struct device *dev, struct device_attribute *attr, char *buf)
1117 {
1118         struct idxd_wq *wq = confdev_to_wq(dev);
1119
1120         return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags));
1121 }
1122
1123 static ssize_t wq_prs_disable_store(struct device *dev, struct device_attribute *attr,
1124                                     const char *buf, size_t count)
1125 {
1126         struct idxd_wq *wq = confdev_to_wq(dev);
1127         struct idxd_device *idxd = wq->idxd;
1128         bool prs_dis;
1129         int rc;
1130
1131         if (wq->state != IDXD_WQ_DISABLED)
1132                 return -EPERM;
1133
1134         if (!idxd->hw.wq_cap.wq_prs_support)
1135                 return -EOPNOTSUPP;
1136
1137         rc = kstrtobool(buf, &prs_dis);
1138         if (rc < 0)
1139                 return rc;
1140
1141         if (prs_dis) {
1142                 set_bit(WQ_FLAG_PRS_DISABLE, &wq->flags);
1143                 /* when PRS is disabled, BOF needs to be off as well */
1144                 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
1145         } else {
1146                 clear_bit(WQ_FLAG_PRS_DISABLE, &wq->flags);
1147         }
1148         return count;
1149 }
1150
1151 static struct device_attribute dev_attr_wq_prs_disable =
1152                 __ATTR(prs_disable, 0644, wq_prs_disable_show, wq_prs_disable_store);
1153
1154 static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf)
1155 {
1156         struct idxd_wq *wq = confdev_to_wq(dev);
1157         struct idxd_device *idxd = wq->idxd;
1158         u32 occup, offset;
1159
1160         if (!idxd->hw.wq_cap.occupancy)
1161                 return -EOPNOTSUPP;
1162
1163         offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX);
1164         occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK;
1165
1166         return sysfs_emit(buf, "%u\n", occup);
1167 }
1168
1169 static struct device_attribute dev_attr_wq_occupancy =
1170                 __ATTR(occupancy, 0444, wq_occupancy_show, NULL);
1171
1172 static ssize_t wq_enqcmds_retries_show(struct device *dev,
1173                                        struct device_attribute *attr, char *buf)
1174 {
1175         struct idxd_wq *wq = confdev_to_wq(dev);
1176
1177         if (wq_dedicated(wq))
1178                 return -EOPNOTSUPP;
1179
1180         return sysfs_emit(buf, "%u\n", wq->enqcmds_retries);
1181 }
1182
1183 static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr,
1184                                         const char *buf, size_t count)
1185 {
1186         struct idxd_wq *wq = confdev_to_wq(dev);
1187         int rc;
1188         unsigned int retries;
1189
1190         if (wq_dedicated(wq))
1191                 return -EOPNOTSUPP;
1192
1193         rc = kstrtouint(buf, 10, &retries);
1194         if (rc < 0)
1195                 return rc;
1196
1197         if (retries > IDXD_ENQCMDS_MAX_RETRIES)
1198                 retries = IDXD_ENQCMDS_MAX_RETRIES;
1199
1200         wq->enqcmds_retries = retries;
1201         return count;
1202 }
1203
1204 static struct device_attribute dev_attr_wq_enqcmds_retries =
1205                 __ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store);
1206
1207 static ssize_t wq_op_config_show(struct device *dev,
1208                                  struct device_attribute *attr, char *buf)
1209 {
1210         struct idxd_wq *wq = confdev_to_wq(dev);
1211
1212         return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap);
1213 }
1214
1215 static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask)
1216 {
1217         int bit;
1218
1219         /*
1220          * The OPCAP is defined as 256 bits that represents each operation the device
1221          * supports per bit. Iterate through all the bits and check if the input mask
1222          * is set for bits that are not set in the OPCAP for the device. If no OPCAP
1223          * bit is set and input mask has the bit set, then return error.
1224          */
1225         for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) {
1226                 if (!test_bit(bit, idxd->opcap_bmap))
1227                         return -EINVAL;
1228         }
1229
1230         return 0;
1231 }
1232
1233 static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr,
1234                                   const char *buf, size_t count)
1235 {
1236         struct idxd_wq *wq = confdev_to_wq(dev);
1237         struct idxd_device *idxd = wq->idxd;
1238         unsigned long *opmask;
1239         int rc;
1240
1241         if (wq->state != IDXD_WQ_DISABLED)
1242                 return -EPERM;
1243
1244         opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL);
1245         if (!opmask)
1246                 return -ENOMEM;
1247
1248         rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS);
1249         if (rc < 0)
1250                 goto err;
1251
1252         rc = idxd_verify_supported_opcap(idxd, opmask);
1253         if (rc < 0)
1254                 goto err;
1255
1256         bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS);
1257
1258         bitmap_free(opmask);
1259         return count;
1260
1261 err:
1262         bitmap_free(opmask);
1263         return rc;
1264 }
1265
1266 static struct device_attribute dev_attr_wq_op_config =
1267                 __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
1268
1269 static struct attribute *idxd_wq_attributes[] = {
1270         &dev_attr_wq_clients.attr,
1271         &dev_attr_wq_state.attr,
1272         &dev_attr_wq_group_id.attr,
1273         &dev_attr_wq_mode.attr,
1274         &dev_attr_wq_size.attr,
1275         &dev_attr_wq_priority.attr,
1276         &dev_attr_wq_block_on_fault.attr,
1277         &dev_attr_wq_threshold.attr,
1278         &dev_attr_wq_type.attr,
1279         &dev_attr_wq_name.attr,
1280         &dev_attr_wq_cdev_minor.attr,
1281         &dev_attr_wq_max_transfer_size.attr,
1282         &dev_attr_wq_max_batch_size.attr,
1283         &dev_attr_wq_ats_disable.attr,
1284         &dev_attr_wq_prs_disable.attr,
1285         &dev_attr_wq_occupancy.attr,
1286         &dev_attr_wq_enqcmds_retries.attr,
1287         &dev_attr_wq_op_config.attr,
1288         NULL,
1289 };
1290
1291 /*  A WQ attr is invisible if the feature is not supported in WQCAP. */
1292 #define idxd_wq_attr_invisible(name, cap_field, a, idxd)                \
1293         ((a) == &dev_attr_wq_##name.attr && !(idxd)->hw.wq_cap.cap_field)
1294
1295 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr,
1296                                                   struct idxd_device *idxd)
1297 {
1298         /* Intel IAA does not support batch processing, make it invisible */
1299         return attr == &dev_attr_wq_max_batch_size.attr &&
1300                idxd->data->type == IDXD_TYPE_IAX;
1301 }
1302
1303 static umode_t idxd_wq_attr_visible(struct kobject *kobj,
1304                                     struct attribute *attr, int n)
1305 {
1306         struct device *dev = container_of(kobj, struct device, kobj);
1307         struct idxd_wq *wq = confdev_to_wq(dev);
1308         struct idxd_device *idxd = wq->idxd;
1309
1310         if (idxd_wq_attr_invisible(op_config, op_config, attr, idxd))
1311                 return 0;
1312
1313         if (idxd_wq_attr_max_batch_size_invisible(attr, idxd))
1314                 return 0;
1315
1316         if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd))
1317                 return 0;
1318
1319         if (idxd_wq_attr_invisible(ats_disable, wq_ats_support, attr, idxd))
1320                 return 0;
1321
1322         return attr->mode;
1323 }
1324
1325 static const struct attribute_group idxd_wq_attribute_group = {
1326         .attrs = idxd_wq_attributes,
1327         .is_visible = idxd_wq_attr_visible,
1328 };
1329
1330 static const struct attribute_group *idxd_wq_attribute_groups[] = {
1331         &idxd_wq_attribute_group,
1332         NULL,
1333 };
1334
1335 static void idxd_conf_wq_release(struct device *dev)
1336 {
1337         struct idxd_wq *wq = confdev_to_wq(dev);
1338
1339         bitmap_free(wq->opcap_bmap);
1340         kfree(wq->wqcfg);
1341         xa_destroy(&wq->upasid_xa);
1342         kfree(wq);
1343 }
1344
1345 struct device_type idxd_wq_device_type = {
1346         .name = "wq",
1347         .release = idxd_conf_wq_release,
1348         .groups = idxd_wq_attribute_groups,
1349 };
1350
1351 /* IDXD device attribs */
1352 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
1353                             char *buf)
1354 {
1355         struct idxd_device *idxd = confdev_to_idxd(dev);
1356
1357         return sysfs_emit(buf, "%#x\n", idxd->hw.version);
1358 }
1359 static DEVICE_ATTR_RO(version);
1360
1361 static ssize_t max_work_queues_size_show(struct device *dev,
1362                                          struct device_attribute *attr,
1363                                          char *buf)
1364 {
1365         struct idxd_device *idxd = confdev_to_idxd(dev);
1366
1367         return sysfs_emit(buf, "%u\n", idxd->max_wq_size);
1368 }
1369 static DEVICE_ATTR_RO(max_work_queues_size);
1370
1371 static ssize_t max_groups_show(struct device *dev,
1372                                struct device_attribute *attr, char *buf)
1373 {
1374         struct idxd_device *idxd = confdev_to_idxd(dev);
1375
1376         return sysfs_emit(buf, "%u\n", idxd->max_groups);
1377 }
1378 static DEVICE_ATTR_RO(max_groups);
1379
1380 static ssize_t max_work_queues_show(struct device *dev,
1381                                     struct device_attribute *attr, char *buf)
1382 {
1383         struct idxd_device *idxd = confdev_to_idxd(dev);
1384
1385         return sysfs_emit(buf, "%u\n", idxd->max_wqs);
1386 }
1387 static DEVICE_ATTR_RO(max_work_queues);
1388
1389 static ssize_t max_engines_show(struct device *dev,
1390                                 struct device_attribute *attr, char *buf)
1391 {
1392         struct idxd_device *idxd = confdev_to_idxd(dev);
1393
1394         return sysfs_emit(buf, "%u\n", idxd->max_engines);
1395 }
1396 static DEVICE_ATTR_RO(max_engines);
1397
1398 static ssize_t numa_node_show(struct device *dev,
1399                               struct device_attribute *attr, char *buf)
1400 {
1401         struct idxd_device *idxd = confdev_to_idxd(dev);
1402
1403         return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
1404 }
1405 static DEVICE_ATTR_RO(numa_node);
1406
1407 static ssize_t max_batch_size_show(struct device *dev,
1408                                    struct device_attribute *attr, char *buf)
1409 {
1410         struct idxd_device *idxd = confdev_to_idxd(dev);
1411
1412         return sysfs_emit(buf, "%u\n", idxd->max_batch_size);
1413 }
1414 static DEVICE_ATTR_RO(max_batch_size);
1415
1416 static ssize_t max_transfer_size_show(struct device *dev,
1417                                       struct device_attribute *attr,
1418                                       char *buf)
1419 {
1420         struct idxd_device *idxd = confdev_to_idxd(dev);
1421
1422         return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes);
1423 }
1424 static DEVICE_ATTR_RO(max_transfer_size);
1425
1426 static ssize_t op_cap_show(struct device *dev,
1427                            struct device_attribute *attr, char *buf)
1428 {
1429         struct idxd_device *idxd = confdev_to_idxd(dev);
1430
1431         return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap);
1432 }
1433 static DEVICE_ATTR_RO(op_cap);
1434
1435 static ssize_t gen_cap_show(struct device *dev,
1436                             struct device_attribute *attr, char *buf)
1437 {
1438         struct idxd_device *idxd = confdev_to_idxd(dev);
1439
1440         return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits);
1441 }
1442 static DEVICE_ATTR_RO(gen_cap);
1443
1444 static ssize_t configurable_show(struct device *dev,
1445                                  struct device_attribute *attr, char *buf)
1446 {
1447         struct idxd_device *idxd = confdev_to_idxd(dev);
1448
1449         return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
1450 }
1451 static DEVICE_ATTR_RO(configurable);
1452
1453 static ssize_t clients_show(struct device *dev,
1454                             struct device_attribute *attr, char *buf)
1455 {
1456         struct idxd_device *idxd = confdev_to_idxd(dev);
1457         int count = 0, i;
1458
1459         spin_lock(&idxd->dev_lock);
1460         for (i = 0; i < idxd->max_wqs; i++) {
1461                 struct idxd_wq *wq = idxd->wqs[i];
1462
1463                 count += wq->client_count;
1464         }
1465         spin_unlock(&idxd->dev_lock);
1466
1467         return sysfs_emit(buf, "%d\n", count);
1468 }
1469 static DEVICE_ATTR_RO(clients);
1470
1471 static ssize_t pasid_enabled_show(struct device *dev,
1472                                   struct device_attribute *attr, char *buf)
1473 {
1474         struct idxd_device *idxd = confdev_to_idxd(dev);
1475
1476         return sysfs_emit(buf, "%u\n", device_user_pasid_enabled(idxd));
1477 }
1478 static DEVICE_ATTR_RO(pasid_enabled);
1479
1480 static ssize_t state_show(struct device *dev,
1481                           struct device_attribute *attr, char *buf)
1482 {
1483         struct idxd_device *idxd = confdev_to_idxd(dev);
1484
1485         switch (idxd->state) {
1486         case IDXD_DEV_DISABLED:
1487                 return sysfs_emit(buf, "disabled\n");
1488         case IDXD_DEV_ENABLED:
1489                 return sysfs_emit(buf, "enabled\n");
1490         case IDXD_DEV_HALTED:
1491                 return sysfs_emit(buf, "halted\n");
1492         }
1493
1494         return sysfs_emit(buf, "unknown\n");
1495 }
1496 static DEVICE_ATTR_RO(state);
1497
1498 static ssize_t errors_show(struct device *dev,
1499                            struct device_attribute *attr, char *buf)
1500 {
1501         struct idxd_device *idxd = confdev_to_idxd(dev);
1502         DECLARE_BITMAP(swerr_bmap, 256);
1503
1504         bitmap_zero(swerr_bmap, 256);
1505         spin_lock(&idxd->dev_lock);
1506         multi_u64_to_bmap(swerr_bmap, &idxd->sw_err.bits[0], 4);
1507         spin_unlock(&idxd->dev_lock);
1508         return sysfs_emit(buf, "%*pb\n", 256, swerr_bmap);
1509 }
1510 static DEVICE_ATTR_RO(errors);
1511
1512 static ssize_t max_read_buffers_show(struct device *dev,
1513                                      struct device_attribute *attr, char *buf)
1514 {
1515         struct idxd_device *idxd = confdev_to_idxd(dev);
1516
1517         return sysfs_emit(buf, "%u\n", idxd->max_rdbufs);
1518 }
1519
1520 static ssize_t max_tokens_show(struct device *dev,
1521                                struct device_attribute *attr, char *buf)
1522 {
1523         dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n");
1524         return max_read_buffers_show(dev, attr, buf);
1525 }
1526
1527 static DEVICE_ATTR_RO(max_tokens);      /* deprecated */
1528 static DEVICE_ATTR_RO(max_read_buffers);
1529
1530 static ssize_t read_buffer_limit_show(struct device *dev,
1531                                       struct device_attribute *attr, char *buf)
1532 {
1533         struct idxd_device *idxd = confdev_to_idxd(dev);
1534
1535         return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit);
1536 }
1537
1538 static ssize_t token_limit_show(struct device *dev,
1539                                 struct device_attribute *attr, char *buf)
1540 {
1541         dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n");
1542         return read_buffer_limit_show(dev, attr, buf);
1543 }
1544
1545 static ssize_t read_buffer_limit_store(struct device *dev,
1546                                        struct device_attribute *attr,
1547                                        const char *buf, size_t count)
1548 {
1549         struct idxd_device *idxd = confdev_to_idxd(dev);
1550         unsigned long val;
1551         int rc;
1552
1553         rc = kstrtoul(buf, 10, &val);
1554         if (rc < 0)
1555                 return -EINVAL;
1556
1557         if (idxd->state == IDXD_DEV_ENABLED)
1558                 return -EPERM;
1559
1560         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1561                 return -EPERM;
1562
1563         if (!idxd->hw.group_cap.rdbuf_limit)
1564                 return -EPERM;
1565
1566         if (val > idxd->hw.group_cap.total_rdbufs)
1567                 return -EINVAL;
1568
1569         idxd->rdbuf_limit = val;
1570         return count;
1571 }
1572
1573 static ssize_t token_limit_store(struct device *dev,
1574                                  struct device_attribute *attr,
1575                                  const char *buf, size_t count)
1576 {
1577         dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n");
1578         return read_buffer_limit_store(dev, attr, buf, count);
1579 }
1580
1581 static DEVICE_ATTR_RW(token_limit);     /* deprecated */
1582 static DEVICE_ATTR_RW(read_buffer_limit);
1583
1584 static ssize_t cdev_major_show(struct device *dev,
1585                                struct device_attribute *attr, char *buf)
1586 {
1587         struct idxd_device *idxd = confdev_to_idxd(dev);
1588
1589         return sysfs_emit(buf, "%u\n", idxd->major);
1590 }
1591 static DEVICE_ATTR_RO(cdev_major);
1592
1593 static ssize_t cmd_status_show(struct device *dev,
1594                                struct device_attribute *attr, char *buf)
1595 {
1596         struct idxd_device *idxd = confdev_to_idxd(dev);
1597
1598         return sysfs_emit(buf, "%#x\n", idxd->cmd_status);
1599 }
1600
1601 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr,
1602                                 const char *buf, size_t count)
1603 {
1604         struct idxd_device *idxd = confdev_to_idxd(dev);
1605
1606         idxd->cmd_status = 0;
1607         return count;
1608 }
1609 static DEVICE_ATTR_RW(cmd_status);
1610
1611 static ssize_t iaa_cap_show(struct device *dev,
1612                             struct device_attribute *attr, char *buf)
1613 {
1614         struct idxd_device *idxd = confdev_to_idxd(dev);
1615
1616         if (idxd->hw.version < DEVICE_VERSION_2)
1617                 return -EOPNOTSUPP;
1618
1619         return sysfs_emit(buf, "%#llx\n", idxd->hw.iaa_cap.bits);
1620 }
1621 static DEVICE_ATTR_RO(iaa_cap);
1622
1623 static ssize_t event_log_size_show(struct device *dev,
1624                                    struct device_attribute *attr, char *buf)
1625 {
1626         struct idxd_device *idxd = confdev_to_idxd(dev);
1627
1628         if (!idxd->evl)
1629                 return -EOPNOTSUPP;
1630
1631         return sysfs_emit(buf, "%u\n", idxd->evl->size);
1632 }
1633
1634 static ssize_t event_log_size_store(struct device *dev,
1635                                     struct device_attribute *attr,
1636                                     const char *buf, size_t count)
1637 {
1638         struct idxd_device *idxd = confdev_to_idxd(dev);
1639         unsigned long val;
1640         int rc;
1641
1642         if (!idxd->evl)
1643                 return -EOPNOTSUPP;
1644
1645         rc = kstrtoul(buf, 10, &val);
1646         if (rc < 0)
1647                 return -EINVAL;
1648
1649         if (idxd->state == IDXD_DEV_ENABLED)
1650                 return -EPERM;
1651
1652         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1653                 return -EPERM;
1654
1655         if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX ||
1656             (val * evl_ent_size(idxd) > ULONG_MAX - idxd->evl->dma))
1657                 return -EINVAL;
1658
1659         idxd->evl->size = val;
1660         return count;
1661 }
1662 static DEVICE_ATTR_RW(event_log_size);
1663
1664 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr,
1665                                                       struct idxd_device *idxd)
1666 {
1667         /* Intel IAA does not support batch processing, make it invisible */
1668         return attr == &dev_attr_max_batch_size.attr &&
1669                idxd->data->type == IDXD_TYPE_IAX;
1670 }
1671
1672 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr,
1673                                                     struct idxd_device *idxd)
1674 {
1675         /*
1676          * Intel IAA does not support Read Buffer allocation control,
1677          * make these attributes invisible.
1678          */
1679         return (attr == &dev_attr_max_tokens.attr ||
1680                 attr == &dev_attr_max_read_buffers.attr ||
1681                 attr == &dev_attr_token_limit.attr ||
1682                 attr == &dev_attr_read_buffer_limit.attr) &&
1683                 idxd->data->type == IDXD_TYPE_IAX;
1684 }
1685
1686 static bool idxd_device_attr_iaa_cap_invisible(struct attribute *attr,
1687                                                struct idxd_device *idxd)
1688 {
1689         return attr == &dev_attr_iaa_cap.attr &&
1690                (idxd->data->type != IDXD_TYPE_IAX ||
1691                idxd->hw.version < DEVICE_VERSION_2);
1692 }
1693
1694 static bool idxd_device_attr_event_log_size_invisible(struct attribute *attr,
1695                                                       struct idxd_device *idxd)
1696 {
1697         return (attr == &dev_attr_event_log_size.attr &&
1698                 !idxd->hw.gen_cap.evl_support);
1699 }
1700
1701 static umode_t idxd_device_attr_visible(struct kobject *kobj,
1702                                         struct attribute *attr, int n)
1703 {
1704         struct device *dev = container_of(kobj, struct device, kobj);
1705         struct idxd_device *idxd = confdev_to_idxd(dev);
1706
1707         if (idxd_device_attr_max_batch_size_invisible(attr, idxd))
1708                 return 0;
1709
1710         if (idxd_device_attr_read_buffers_invisible(attr, idxd))
1711                 return 0;
1712
1713         if (idxd_device_attr_iaa_cap_invisible(attr, idxd))
1714                 return 0;
1715
1716         if (idxd_device_attr_event_log_size_invisible(attr, idxd))
1717                 return 0;
1718
1719         return attr->mode;
1720 }
1721
1722 static struct attribute *idxd_device_attributes[] = {
1723         &dev_attr_version.attr,
1724         &dev_attr_max_groups.attr,
1725         &dev_attr_max_work_queues.attr,
1726         &dev_attr_max_work_queues_size.attr,
1727         &dev_attr_max_engines.attr,
1728         &dev_attr_numa_node.attr,
1729         &dev_attr_max_batch_size.attr,
1730         &dev_attr_max_transfer_size.attr,
1731         &dev_attr_op_cap.attr,
1732         &dev_attr_gen_cap.attr,
1733         &dev_attr_configurable.attr,
1734         &dev_attr_clients.attr,
1735         &dev_attr_pasid_enabled.attr,
1736         &dev_attr_state.attr,
1737         &dev_attr_errors.attr,
1738         &dev_attr_max_tokens.attr,
1739         &dev_attr_max_read_buffers.attr,
1740         &dev_attr_token_limit.attr,
1741         &dev_attr_read_buffer_limit.attr,
1742         &dev_attr_cdev_major.attr,
1743         &dev_attr_cmd_status.attr,
1744         &dev_attr_iaa_cap.attr,
1745         &dev_attr_event_log_size.attr,
1746         NULL,
1747 };
1748
1749 static const struct attribute_group idxd_device_attribute_group = {
1750         .attrs = idxd_device_attributes,
1751         .is_visible = idxd_device_attr_visible,
1752 };
1753
1754 static const struct attribute_group *idxd_attribute_groups[] = {
1755         &idxd_device_attribute_group,
1756         NULL,
1757 };
1758
1759 static void idxd_conf_device_release(struct device *dev)
1760 {
1761         struct idxd_device *idxd = confdev_to_idxd(dev);
1762
1763         kfree(idxd->groups);
1764         bitmap_free(idxd->wq_enable_map);
1765         kfree(idxd->wqs);
1766         kfree(idxd->engines);
1767         kfree(idxd->evl);
1768         kmem_cache_destroy(idxd->evl_cache);
1769         ida_free(&idxd_ida, idxd->id);
1770         bitmap_free(idxd->opcap_bmap);
1771         kfree(idxd);
1772 }
1773
1774 struct device_type dsa_device_type = {
1775         .name = "dsa",
1776         .release = idxd_conf_device_release,
1777         .groups = idxd_attribute_groups,
1778 };
1779
1780 struct device_type iax_device_type = {
1781         .name = "iax",
1782         .release = idxd_conf_device_release,
1783         .groups = idxd_attribute_groups,
1784 };
1785
1786 static int idxd_register_engine_devices(struct idxd_device *idxd)
1787 {
1788         struct idxd_engine *engine;
1789         int i, j, rc;
1790
1791         for (i = 0; i < idxd->max_engines; i++) {
1792                 engine = idxd->engines[i];
1793                 rc = device_add(engine_confdev(engine));
1794                 if (rc < 0)
1795                         goto cleanup;
1796         }
1797
1798         return 0;
1799
1800 cleanup:
1801         j = i - 1;
1802         for (; i < idxd->max_engines; i++) {
1803                 engine = idxd->engines[i];
1804                 put_device(engine_confdev(engine));
1805         }
1806
1807         while (j--) {
1808                 engine = idxd->engines[j];
1809                 device_unregister(engine_confdev(engine));
1810         }
1811         return rc;
1812 }
1813
1814 static int idxd_register_group_devices(struct idxd_device *idxd)
1815 {
1816         struct idxd_group *group;
1817         int i, j, rc;
1818
1819         for (i = 0; i < idxd->max_groups; i++) {
1820                 group = idxd->groups[i];
1821                 rc = device_add(group_confdev(group));
1822                 if (rc < 0)
1823                         goto cleanup;
1824         }
1825
1826         return 0;
1827
1828 cleanup:
1829         j = i - 1;
1830         for (; i < idxd->max_groups; i++) {
1831                 group = idxd->groups[i];
1832                 put_device(group_confdev(group));
1833         }
1834
1835         while (j--) {
1836                 group = idxd->groups[j];
1837                 device_unregister(group_confdev(group));
1838         }
1839         return rc;
1840 }
1841
1842 static int idxd_register_wq_devices(struct idxd_device *idxd)
1843 {
1844         struct idxd_wq *wq;
1845         int i, rc, j;
1846
1847         for (i = 0; i < idxd->max_wqs; i++) {
1848                 wq = idxd->wqs[i];
1849                 rc = device_add(wq_confdev(wq));
1850                 if (rc < 0)
1851                         goto cleanup;
1852         }
1853
1854         return 0;
1855
1856 cleanup:
1857         j = i - 1;
1858         for (; i < idxd->max_wqs; i++) {
1859                 wq = idxd->wqs[i];
1860                 put_device(wq_confdev(wq));
1861         }
1862
1863         while (j--) {
1864                 wq = idxd->wqs[j];
1865                 device_unregister(wq_confdev(wq));
1866         }
1867         return rc;
1868 }
1869
1870 int idxd_register_devices(struct idxd_device *idxd)
1871 {
1872         struct device *dev = &idxd->pdev->dev;
1873         int rc, i;
1874
1875         rc = device_add(idxd_confdev(idxd));
1876         if (rc < 0)
1877                 return rc;
1878
1879         rc = idxd_register_wq_devices(idxd);
1880         if (rc < 0) {
1881                 dev_dbg(dev, "WQ devices registering failed: %d\n", rc);
1882                 goto err_wq;
1883         }
1884
1885         rc = idxd_register_engine_devices(idxd);
1886         if (rc < 0) {
1887                 dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
1888                 goto err_engine;
1889         }
1890
1891         rc = idxd_register_group_devices(idxd);
1892         if (rc < 0) {
1893                 dev_dbg(dev, "Group device registering failed: %d\n", rc);
1894                 goto err_group;
1895         }
1896
1897         return 0;
1898
1899  err_group:
1900         for (i = 0; i < idxd->max_engines; i++)
1901                 device_unregister(engine_confdev(idxd->engines[i]));
1902  err_engine:
1903         for (i = 0; i < idxd->max_wqs; i++)
1904                 device_unregister(wq_confdev(idxd->wqs[i]));
1905  err_wq:
1906         device_del(idxd_confdev(idxd));
1907         return rc;
1908 }
1909
1910 void idxd_unregister_devices(struct idxd_device *idxd)
1911 {
1912         int i;
1913
1914         for (i = 0; i < idxd->max_wqs; i++) {
1915                 struct idxd_wq *wq = idxd->wqs[i];
1916
1917                 device_unregister(wq_confdev(wq));
1918         }
1919
1920         for (i = 0; i < idxd->max_engines; i++) {
1921                 struct idxd_engine *engine = idxd->engines[i];
1922
1923                 device_unregister(engine_confdev(engine));
1924         }
1925
1926         for (i = 0; i < idxd->max_groups; i++) {
1927                 struct idxd_group *group = idxd->groups[i];
1928
1929                 device_unregister(group_confdev(group));
1930         }
1931 }
1932
1933 int idxd_register_bus_type(void)
1934 {
1935         return bus_register(&dsa_bus_type);
1936 }
1937
1938 void idxd_unregister_bus_type(void)
1939 {
1940         bus_unregister(&dsa_bus_type);
1941 }