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                 set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
 827         else
 828                 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
 829
 830         return count;
 831 }
 832
 833 static struct device_attribute dev_attr_wq_block_on_fault =
 834                 __ATTR(block_on_fault, 0644, wq_block_on_fault_show,
 835                        wq_block_on_fault_store);
 836
 837 static ssize_t wq_threshold_show(struct device *dev,
 838                                  struct device_attribute *attr, char *buf)
 839 {
 840         struct idxd_wq *wq = confdev_to_wq(dev);
 841
 842         return sysfs_emit(buf, "%u\n", wq->threshold);
 843 }
 844
 845 static ssize_t wq_threshold_store(struct device *dev,
 846                                   struct device_attribute *attr,
 847                                   const char *buf, size_t count)
 848 {
 849         struct idxd_wq *wq = confdev_to_wq(dev);
 850         struct idxd_device *idxd = wq->idxd;
 851         unsigned int val;
 852         int rc;
 853
 854         rc = kstrtouint(buf, 0, &val);
 855         if (rc < 0)
 856                 return -EINVAL;
 857
 858         if (val > wq->size || val <= 0)
 859                 return -EINVAL;
 860
 861         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 862                 return -EPERM;
 863
 864         if (wq->state != IDXD_WQ_DISABLED)
 865                 return -ENXIO;
 866
 867         if (test_bit(WQ_FLAG_DEDICATED, &wq->flags))
 868                 return -EINVAL;
 869
 870         wq->threshold = val;
 871
 872         return count;
 873 }
 874
 875 static struct device_attribute dev_attr_wq_threshold =
 876                 __ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store);
 877
 878 static ssize_t wq_type_show(struct device *dev,
 879                             struct device_attribute *attr, char *buf)
 880 {
 881         struct idxd_wq *wq = confdev_to_wq(dev);
 882
 883         switch (wq->type) {
 884         case IDXD_WQT_KERNEL:
 885                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]);
 886         case IDXD_WQT_USER:
 887                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
 888         case IDXD_WQT_NONE:
 889         default:
 890                 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]);
 891         }
 892
 893         return -EINVAL;
 894 }
 895
 896 static ssize_t wq_type_store(struct device *dev,
 897                              struct device_attribute *attr, const char *buf,
 898                              size_t count)
 899 {
 900         struct idxd_wq *wq = confdev_to_wq(dev);
 901         enum idxd_wq_type old_type;
 902
 903         if (wq->state != IDXD_WQ_DISABLED)
 904                 return -EPERM;
 905
 906         old_type = wq->type;
 907         if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE]))
 908                 wq->type = IDXD_WQT_NONE;
 909         else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL]))
 910                 wq->type = IDXD_WQT_KERNEL;
 911         else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER]))
 912                 wq->type = IDXD_WQT_USER;
 913         else
 914                 return -EINVAL;
 915
 916         /* If we are changing queue type, clear the name */
 917         if (wq->type != old_type)
 918                 memset(wq->name, 0, WQ_NAME_SIZE + 1);
 919
 920         return count;
 921 }
 922
 923 static struct device_attribute dev_attr_wq_type =
 924                 __ATTR(type, 0644, wq_type_show, wq_type_store);
 925
 926 static ssize_t wq_name_show(struct device *dev,
 927                             struct device_attribute *attr, char *buf)
 928 {
 929         struct idxd_wq *wq = confdev_to_wq(dev);
 930
 931         return sysfs_emit(buf, "%s\n", wq->name);
 932 }
 933
 934 static ssize_t wq_name_store(struct device *dev,
 935                              struct device_attribute *attr, const char *buf,
 936                              size_t count)
 937 {
 938         struct idxd_wq *wq = confdev_to_wq(dev);
 939         char *input, *pos;
 940
 941         if (wq->state != IDXD_WQ_DISABLED)
 942                 return -EPERM;
 943
 944         if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0)
 945                 return -EINVAL;
 946
 947         /*
 948          * This is temporarily placed here until we have SVM support for
 949          * dmaengine.
 950          */
 951         if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd))
 952                 return -EOPNOTSUPP;
 953
 954         input = kstrndup(buf, count, GFP_KERNEL);
 955         if (!input)
 956                 return -ENOMEM;
 957
 958         pos = strim(input);
 959         memset(wq->name, 0, WQ_NAME_SIZE + 1);
 960         sprintf(wq->name, "%s", pos);
 961         kfree(input);
 962         return count;
 963 }
 964
 965 static struct device_attribute dev_attr_wq_name =
 966                 __ATTR(name, 0644, wq_name_show, wq_name_store);
 967
 968 static ssize_t wq_cdev_minor_show(struct device *dev,
 969                                   struct device_attribute *attr, char *buf)
 970 {
 971         struct idxd_wq *wq = confdev_to_wq(dev);
 972         int minor = -1;
 973
 974         mutex_lock(&wq->wq_lock);
 975         if (wq->idxd_cdev)
 976                 minor = wq->idxd_cdev->minor;
 977         mutex_unlock(&wq->wq_lock);
 978
 979         if (minor == -1)
 980                 return -ENXIO;
 981         return sysfs_emit(buf, "%d\n", minor);
 982 }
 983
 984 static struct device_attribute dev_attr_wq_cdev_minor =
 985                 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL);
 986
 987 static int __get_sysfs_u64(const char *buf, u64 *val)
 988 {
 989         int rc;
 990
 991         rc = kstrtou64(buf, 0, val);
 992         if (rc < 0)
 993                 return -EINVAL;
 994
 995         if (*val == 0)
 996                 return -EINVAL;
 997
 998         *val = roundup_pow_of_two(*val);
 999         return 0;
1000 }
1001
1002 static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr,
1003                                          char *buf)
1004 {
1005         struct idxd_wq *wq = confdev_to_wq(dev);
1006
1007         return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes);
1008 }
1009
1010 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr,
1011                                           const char *buf, size_t count)
1012 {
1013         struct idxd_wq *wq = confdev_to_wq(dev);
1014         struct idxd_device *idxd = wq->idxd;
1015         u64 xfer_size;
1016         int rc;
1017
1018         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1019                 return -EPERM;
1020
1021         if (wq->state != IDXD_WQ_DISABLED)
1022                 return -EPERM;
1023
1024         rc = __get_sysfs_u64(buf, &xfer_size);
1025         if (rc < 0)
1026                 return rc;
1027
1028         if (xfer_size > idxd->max_xfer_bytes)
1029                 return -EINVAL;
1030
1031         wq->max_xfer_bytes = xfer_size;
1032
1033         return count;
1034 }
1035
1036 static struct device_attribute dev_attr_wq_max_transfer_size =
1037                 __ATTR(max_transfer_size, 0644,
1038                        wq_max_transfer_size_show, wq_max_transfer_size_store);
1039
1040 static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf)
1041 {
1042         struct idxd_wq *wq = confdev_to_wq(dev);
1043
1044         return sysfs_emit(buf, "%u\n", wq->max_batch_size);
1045 }
1046
1047 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr,
1048                                        const char *buf, size_t count)
1049 {
1050         struct idxd_wq *wq = confdev_to_wq(dev);
1051         struct idxd_device *idxd = wq->idxd;
1052         u64 batch_size;
1053         int rc;
1054
1055         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1056                 return -EPERM;
1057
1058         if (wq->state != IDXD_WQ_DISABLED)
1059                 return -EPERM;
1060
1061         rc = __get_sysfs_u64(buf, &batch_size);
1062         if (rc < 0)
1063                 return rc;
1064
1065         if (batch_size > idxd->max_batch_size)
1066                 return -EINVAL;
1067
1068         idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size);
1069
1070         return count;
1071 }
1072
1073 static struct device_attribute dev_attr_wq_max_batch_size =
1074                 __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store);
1075
1076 static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf)
1077 {
1078         struct idxd_wq *wq = confdev_to_wq(dev);
1079
1080         return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags));
1081 }
1082
1083 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
1084                                     const char *buf, size_t count)
1085 {
1086         struct idxd_wq *wq = confdev_to_wq(dev);
1087         struct idxd_device *idxd = wq->idxd;
1088         bool ats_dis;
1089         int rc;
1090
1091         if (wq->state != IDXD_WQ_DISABLED)
1092                 return -EPERM;
1093
1094         if (!idxd->hw.wq_cap.wq_ats_support)
1095                 return -EOPNOTSUPP;
1096
1097         rc = kstrtobool(buf, &ats_dis);
1098         if (rc < 0)
1099                 return rc;
1100
1101         if (ats_dis)
1102                 set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1103         else
1104                 clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1105
1106         return count;
1107 }
1108
1109 static struct device_attribute dev_attr_wq_ats_disable =
1110                 __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store);
1111
1112 static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf)
1113 {
1114         struct idxd_wq *wq = confdev_to_wq(dev);
1115         struct idxd_device *idxd = wq->idxd;
1116         u32 occup, offset;
1117
1118         if (!idxd->hw.wq_cap.occupancy)
1119                 return -EOPNOTSUPP;
1120
1121         offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX);
1122         occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK;
1123
1124         return sysfs_emit(buf, "%u\n", occup);
1125 }
1126
1127 static struct device_attribute dev_attr_wq_occupancy =
1128                 __ATTR(occupancy, 0444, wq_occupancy_show, NULL);
1129
1130 static ssize_t wq_enqcmds_retries_show(struct device *dev,
1131                                        struct device_attribute *attr, char *buf)
1132 {
1133         struct idxd_wq *wq = confdev_to_wq(dev);
1134
1135         if (wq_dedicated(wq))
1136                 return -EOPNOTSUPP;
1137
1138         return sysfs_emit(buf, "%u\n", wq->enqcmds_retries);
1139 }
1140
1141 static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr,
1142                                         const char *buf, size_t count)
1143 {
1144         struct idxd_wq *wq = confdev_to_wq(dev);
1145         int rc;
1146         unsigned int retries;
1147
1148         if (wq_dedicated(wq))
1149                 return -EOPNOTSUPP;
1150
1151         rc = kstrtouint(buf, 10, &retries);
1152         if (rc < 0)
1153                 return rc;
1154
1155         if (retries > IDXD_ENQCMDS_MAX_RETRIES)
1156                 retries = IDXD_ENQCMDS_MAX_RETRIES;
1157
1158         wq->enqcmds_retries = retries;
1159         return count;
1160 }
1161
1162 static struct device_attribute dev_attr_wq_enqcmds_retries =
1163                 __ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store);
1164
1165 static ssize_t wq_op_config_show(struct device *dev,
1166                                  struct device_attribute *attr, char *buf)
1167 {
1168         struct idxd_wq *wq = confdev_to_wq(dev);
1169
1170         return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap);
1171 }
1172
1173 static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask)
1174 {
1175         int bit;
1176
1177         /*
1178          * The OPCAP is defined as 256 bits that represents each operation the device
1179          * supports per bit. Iterate through all the bits and check if the input mask
1180          * is set for bits that are not set in the OPCAP for the device. If no OPCAP
1181          * bit is set and input mask has the bit set, then return error.
1182          */
1183         for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) {
1184                 if (!test_bit(bit, idxd->opcap_bmap))
1185                         return -EINVAL;
1186         }
1187
1188         return 0;
1189 }
1190
1191 static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr,
1192                                   const char *buf, size_t count)
1193 {
1194         struct idxd_wq *wq = confdev_to_wq(dev);
1195         struct idxd_device *idxd = wq->idxd;
1196         unsigned long *opmask;
1197         int rc;
1198
1199         if (wq->state != IDXD_WQ_DISABLED)
1200                 return -EPERM;
1201
1202         opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL);
1203         if (!opmask)
1204                 return -ENOMEM;
1205
1206         rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS);
1207         if (rc < 0)
1208                 goto err;
1209
1210         rc = idxd_verify_supported_opcap(idxd, opmask);
1211         if (rc < 0)
1212                 goto err;
1213
1214         bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS);
1215
1216         bitmap_free(opmask);
1217         return count;
1218
1219 err:
1220         bitmap_free(opmask);
1221         return rc;
1222 }
1223
1224 static struct device_attribute dev_attr_wq_op_config =
1225                 __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
1226
1227 static struct attribute *idxd_wq_attributes[] = {
1228         &dev_attr_wq_clients.attr,
1229         &dev_attr_wq_state.attr,
1230         &dev_attr_wq_group_id.attr,
1231         &dev_attr_wq_mode.attr,
1232         &dev_attr_wq_size.attr,
1233         &dev_attr_wq_priority.attr,
1234         &dev_attr_wq_block_on_fault.attr,
1235         &dev_attr_wq_threshold.attr,
1236         &dev_attr_wq_type.attr,
1237         &dev_attr_wq_name.attr,
1238         &dev_attr_wq_cdev_minor.attr,
1239         &dev_attr_wq_max_transfer_size.attr,
1240         &dev_attr_wq_max_batch_size.attr,
1241         &dev_attr_wq_ats_disable.attr,
1242         &dev_attr_wq_occupancy.attr,
1243         &dev_attr_wq_enqcmds_retries.attr,
1244         &dev_attr_wq_op_config.attr,
1245         NULL,
1246 };
1247
1248 static bool idxd_wq_attr_op_config_invisible(struct attribute *attr,
1249                                              struct idxd_device *idxd)
1250 {
1251         return attr == &dev_attr_wq_op_config.attr &&
1252                !idxd->hw.wq_cap.op_config;
1253 }
1254
1255 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr,
1256                                                   struct idxd_device *idxd)
1257 {
1258         /* Intel IAA does not support batch processing, make it invisible */
1259         return attr == &dev_attr_wq_max_batch_size.attr &&
1260                idxd->data->type == IDXD_TYPE_IAX;
1261 }
1262
1263 static umode_t idxd_wq_attr_visible(struct kobject *kobj,
1264                                     struct attribute *attr, int n)
1265 {
1266         struct device *dev = container_of(kobj, struct device, kobj);
1267         struct idxd_wq *wq = confdev_to_wq(dev);
1268         struct idxd_device *idxd = wq->idxd;
1269
1270         if (idxd_wq_attr_op_config_invisible(attr, idxd))
1271                 return 0;
1272
1273         if (idxd_wq_attr_max_batch_size_invisible(attr, idxd))
1274                 return 0;
1275
1276         return attr->mode;
1277 }
1278
1279 static const struct attribute_group idxd_wq_attribute_group = {
1280         .attrs = idxd_wq_attributes,
1281         .is_visible = idxd_wq_attr_visible,
1282 };
1283
1284 static const struct attribute_group *idxd_wq_attribute_groups[] = {
1285         &idxd_wq_attribute_group,
1286         NULL,
1287 };
1288
1289 static void idxd_conf_wq_release(struct device *dev)
1290 {
1291         struct idxd_wq *wq = confdev_to_wq(dev);
1292
1293         bitmap_free(wq->opcap_bmap);
1294         kfree(wq->wqcfg);
1295         kfree(wq);
1296 }
1297
1298 struct device_type idxd_wq_device_type = {
1299         .name = "wq",
1300         .release = idxd_conf_wq_release,
1301         .groups = idxd_wq_attribute_groups,
1302 };
1303
1304 /* IDXD device attribs */
1305 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
1306                             char *buf)
1307 {
1308         struct idxd_device *idxd = confdev_to_idxd(dev);
1309
1310         return sysfs_emit(buf, "%#x\n", idxd->hw.version);
1311 }
1312 static DEVICE_ATTR_RO(version);
1313
1314 static ssize_t max_work_queues_size_show(struct device *dev,
1315                                          struct device_attribute *attr,
1316                                          char *buf)
1317 {
1318         struct idxd_device *idxd = confdev_to_idxd(dev);
1319
1320         return sysfs_emit(buf, "%u\n", idxd->max_wq_size);
1321 }
1322 static DEVICE_ATTR_RO(max_work_queues_size);
1323
1324 static ssize_t max_groups_show(struct device *dev,
1325                                struct device_attribute *attr, char *buf)
1326 {
1327         struct idxd_device *idxd = confdev_to_idxd(dev);
1328
1329         return sysfs_emit(buf, "%u\n", idxd->max_groups);
1330 }
1331 static DEVICE_ATTR_RO(max_groups);
1332
1333 static ssize_t max_work_queues_show(struct device *dev,
1334                                     struct device_attribute *attr, char *buf)
1335 {
1336         struct idxd_device *idxd = confdev_to_idxd(dev);
1337
1338         return sysfs_emit(buf, "%u\n", idxd->max_wqs);
1339 }
1340 static DEVICE_ATTR_RO(max_work_queues);
1341
1342 static ssize_t max_engines_show(struct device *dev,
1343                                 struct device_attribute *attr, char *buf)
1344 {
1345         struct idxd_device *idxd = confdev_to_idxd(dev);
1346
1347         return sysfs_emit(buf, "%u\n", idxd->max_engines);
1348 }
1349 static DEVICE_ATTR_RO(max_engines);
1350
1351 static ssize_t numa_node_show(struct device *dev,
1352                               struct device_attribute *attr, char *buf)
1353 {
1354         struct idxd_device *idxd = confdev_to_idxd(dev);
1355
1356         return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
1357 }
1358 static DEVICE_ATTR_RO(numa_node);
1359
1360 static ssize_t max_batch_size_show(struct device *dev,
1361                                    struct device_attribute *attr, char *buf)
1362 {
1363         struct idxd_device *idxd = confdev_to_idxd(dev);
1364
1365         return sysfs_emit(buf, "%u\n", idxd->max_batch_size);
1366 }
1367 static DEVICE_ATTR_RO(max_batch_size);
1368
1369 static ssize_t max_transfer_size_show(struct device *dev,
1370                                       struct device_attribute *attr,
1371                                       char *buf)
1372 {
1373         struct idxd_device *idxd = confdev_to_idxd(dev);
1374
1375         return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes);
1376 }
1377 static DEVICE_ATTR_RO(max_transfer_size);
1378
1379 static ssize_t op_cap_show(struct device *dev,
1380                            struct device_attribute *attr, char *buf)
1381 {
1382         struct idxd_device *idxd = confdev_to_idxd(dev);
1383
1384         return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap);
1385 }
1386 static DEVICE_ATTR_RO(op_cap);
1387
1388 static ssize_t gen_cap_show(struct device *dev,
1389                             struct device_attribute *attr, char *buf)
1390 {
1391         struct idxd_device *idxd = confdev_to_idxd(dev);
1392
1393         return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits);
1394 }
1395 static DEVICE_ATTR_RO(gen_cap);
1396
1397 static ssize_t configurable_show(struct device *dev,
1398                                  struct device_attribute *attr, char *buf)
1399 {
1400         struct idxd_device *idxd = confdev_to_idxd(dev);
1401
1402         return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
1403 }
1404 static DEVICE_ATTR_RO(configurable);
1405
1406 static ssize_t clients_show(struct device *dev,
1407                             struct device_attribute *attr, char *buf)
1408 {
1409         struct idxd_device *idxd = confdev_to_idxd(dev);
1410         int count = 0, i;
1411
1412         spin_lock(&idxd->dev_lock);
1413         for (i = 0; i < idxd->max_wqs; i++) {
1414                 struct idxd_wq *wq = idxd->wqs[i];
1415
1416                 count += wq->client_count;
1417         }
1418         spin_unlock(&idxd->dev_lock);
1419
1420         return sysfs_emit(buf, "%d\n", count);
1421 }
1422 static DEVICE_ATTR_RO(clients);
1423
1424 static ssize_t pasid_enabled_show(struct device *dev,
1425                                   struct device_attribute *attr, char *buf)
1426 {
1427         struct idxd_device *idxd = confdev_to_idxd(dev);
1428
1429         return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
1430 }
1431 static DEVICE_ATTR_RO(pasid_enabled);
1432
1433 static ssize_t state_show(struct device *dev,
1434                           struct device_attribute *attr, char *buf)
1435 {
1436         struct idxd_device *idxd = confdev_to_idxd(dev);
1437
1438         switch (idxd->state) {
1439         case IDXD_DEV_DISABLED:
1440                 return sysfs_emit(buf, "disabled\n");
1441         case IDXD_DEV_ENABLED:
1442                 return sysfs_emit(buf, "enabled\n");
1443         case IDXD_DEV_HALTED:
1444                 return sysfs_emit(buf, "halted\n");
1445         }
1446
1447         return sysfs_emit(buf, "unknown\n");
1448 }
1449 static DEVICE_ATTR_RO(state);
1450
1451 static ssize_t errors_show(struct device *dev,
1452                            struct device_attribute *attr, char *buf)
1453 {
1454         struct idxd_device *idxd = confdev_to_idxd(dev);
1455         int i, out = 0;
1456
1457         spin_lock(&idxd->dev_lock);
1458         for (i = 0; i < 4; i++)
1459                 out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]);
1460         spin_unlock(&idxd->dev_lock);
1461         out--;
1462         out += sysfs_emit_at(buf, out, "\n");
1463         return out;
1464 }
1465 static DEVICE_ATTR_RO(errors);
1466
1467 static ssize_t max_read_buffers_show(struct device *dev,
1468                                      struct device_attribute *attr, char *buf)
1469 {
1470         struct idxd_device *idxd = confdev_to_idxd(dev);
1471
1472         return sysfs_emit(buf, "%u\n", idxd->max_rdbufs);
1473 }
1474
1475 static ssize_t max_tokens_show(struct device *dev,
1476                                struct device_attribute *attr, char *buf)
1477 {
1478         dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n");
1479         return max_read_buffers_show(dev, attr, buf);
1480 }
1481
1482 static DEVICE_ATTR_RO(max_tokens);      /* deprecated */
1483 static DEVICE_ATTR_RO(max_read_buffers);
1484
1485 static ssize_t read_buffer_limit_show(struct device *dev,
1486                                       struct device_attribute *attr, char *buf)
1487 {
1488         struct idxd_device *idxd = confdev_to_idxd(dev);
1489
1490         return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit);
1491 }
1492
1493 static ssize_t token_limit_show(struct device *dev,
1494                                 struct device_attribute *attr, char *buf)
1495 {
1496         dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n");
1497         return read_buffer_limit_show(dev, attr, buf);
1498 }
1499
1500 static ssize_t read_buffer_limit_store(struct device *dev,
1501                                        struct device_attribute *attr,
1502                                        const char *buf, size_t count)
1503 {
1504         struct idxd_device *idxd = confdev_to_idxd(dev);
1505         unsigned long val;
1506         int rc;
1507
1508         rc = kstrtoul(buf, 10, &val);
1509         if (rc < 0)
1510                 return -EINVAL;
1511
1512         if (idxd->state == IDXD_DEV_ENABLED)
1513                 return -EPERM;
1514
1515         if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1516                 return -EPERM;
1517
1518         if (!idxd->hw.group_cap.rdbuf_limit)
1519                 return -EPERM;
1520
1521         if (val > idxd->hw.group_cap.total_rdbufs)
1522                 return -EINVAL;
1523
1524         idxd->rdbuf_limit = val;
1525         return count;
1526 }
1527
1528 static ssize_t token_limit_store(struct device *dev,
1529                                  struct device_attribute *attr,
1530                                  const char *buf, size_t count)
1531 {
1532         dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n");
1533         return read_buffer_limit_store(dev, attr, buf, count);
1534 }
1535
1536 static DEVICE_ATTR_RW(token_limit);     /* deprecated */
1537 static DEVICE_ATTR_RW(read_buffer_limit);
1538
1539 static ssize_t cdev_major_show(struct device *dev,
1540                                struct device_attribute *attr, char *buf)
1541 {
1542         struct idxd_device *idxd = confdev_to_idxd(dev);
1543
1544         return sysfs_emit(buf, "%u\n", idxd->major);
1545 }
1546 static DEVICE_ATTR_RO(cdev_major);
1547
1548 static ssize_t cmd_status_show(struct device *dev,
1549                                struct device_attribute *attr, char *buf)
1550 {
1551         struct idxd_device *idxd = confdev_to_idxd(dev);
1552
1553         return sysfs_emit(buf, "%#x\n", idxd->cmd_status);
1554 }
1555
1556 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr,
1557                                 const char *buf, size_t count)
1558 {
1559         struct idxd_device *idxd = confdev_to_idxd(dev);
1560
1561         idxd->cmd_status = 0;
1562         return count;
1563 }
1564 static DEVICE_ATTR_RW(cmd_status);
1565
1566 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr,
1567                                                       struct idxd_device *idxd)
1568 {
1569         /* Intel IAA does not support batch processing, make it invisible */
1570         return attr == &dev_attr_max_batch_size.attr &&
1571                idxd->data->type == IDXD_TYPE_IAX;
1572 }
1573
1574 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr,
1575                                                     struct idxd_device *idxd)
1576 {
1577         /*
1578          * Intel IAA does not support Read Buffer allocation control,
1579          * make these attributes invisible.
1580          */
1581         return (attr == &dev_attr_max_tokens.attr ||
1582                 attr == &dev_attr_max_read_buffers.attr ||
1583                 attr == &dev_attr_token_limit.attr ||
1584                 attr == &dev_attr_read_buffer_limit.attr) &&
1585                 idxd->data->type == IDXD_TYPE_IAX;
1586 }
1587
1588 static umode_t idxd_device_attr_visible(struct kobject *kobj,
1589                                         struct attribute *attr, int n)
1590 {
1591         struct device *dev = container_of(kobj, struct device, kobj);
1592         struct idxd_device *idxd = confdev_to_idxd(dev);
1593
1594         if (idxd_device_attr_max_batch_size_invisible(attr, idxd))
1595                 return 0;
1596
1597         if (idxd_device_attr_read_buffers_invisible(attr, idxd))
1598                 return 0;
1599
1600         return attr->mode;
1601 }
1602
1603 static struct attribute *idxd_device_attributes[] = {
1604         &dev_attr_version.attr,
1605         &dev_attr_max_groups.attr,
1606         &dev_attr_max_work_queues.attr,
1607         &dev_attr_max_work_queues_size.attr,
1608         &dev_attr_max_engines.attr,
1609         &dev_attr_numa_node.attr,
1610         &dev_attr_max_batch_size.attr,
1611         &dev_attr_max_transfer_size.attr,
1612         &dev_attr_op_cap.attr,
1613         &dev_attr_gen_cap.attr,
1614         &dev_attr_configurable.attr,
1615         &dev_attr_clients.attr,
1616         &dev_attr_pasid_enabled.attr,
1617         &dev_attr_state.attr,
1618         &dev_attr_errors.attr,
1619         &dev_attr_max_tokens.attr,
1620         &dev_attr_max_read_buffers.attr,
1621         &dev_attr_token_limit.attr,
1622         &dev_attr_read_buffer_limit.attr,
1623         &dev_attr_cdev_major.attr,
1624         &dev_attr_cmd_status.attr,
1625         NULL,
1626 };
1627
1628 static const struct attribute_group idxd_device_attribute_group = {
1629         .attrs = idxd_device_attributes,
1630         .is_visible = idxd_device_attr_visible,
1631 };
1632
1633 static const struct attribute_group *idxd_attribute_groups[] = {
1634         &idxd_device_attribute_group,
1635         NULL,
1636 };
1637
1638 static void idxd_conf_device_release(struct device *dev)
1639 {
1640         struct idxd_device *idxd = confdev_to_idxd(dev);
1641
1642         kfree(idxd->groups);
1643         bitmap_free(idxd->wq_enable_map);
1644         kfree(idxd->wqs);
1645         kfree(idxd->engines);
1646         ida_free(&idxd_ida, idxd->id);
1647         bitmap_free(idxd->opcap_bmap);
1648         kfree(idxd);
1649 }
1650
1651 struct device_type dsa_device_type = {
1652         .name = "dsa",
1653         .release = idxd_conf_device_release,
1654         .groups = idxd_attribute_groups,
1655 };
1656
1657 struct device_type iax_device_type = {
1658         .name = "iax",
1659         .release = idxd_conf_device_release,
1660         .groups = idxd_attribute_groups,
1661 };
1662
1663 static int idxd_register_engine_devices(struct idxd_device *idxd)
1664 {
1665         struct idxd_engine *engine;
1666         int i, j, rc;
1667
1668         for (i = 0; i < idxd->max_engines; i++) {
1669                 engine = idxd->engines[i];
1670                 rc = device_add(engine_confdev(engine));
1671                 if (rc < 0)
1672                         goto cleanup;
1673         }
1674
1675         return 0;
1676
1677 cleanup:
1678         j = i - 1;
1679         for (; i < idxd->max_engines; i++) {
1680                 engine = idxd->engines[i];
1681                 put_device(engine_confdev(engine));
1682         }
1683
1684         while (j--) {
1685                 engine = idxd->engines[j];
1686                 device_unregister(engine_confdev(engine));
1687         }
1688         return rc;
1689 }
1690
1691 static int idxd_register_group_devices(struct idxd_device *idxd)
1692 {
1693         struct idxd_group *group;
1694         int i, j, rc;
1695
1696         for (i = 0; i < idxd->max_groups; i++) {
1697                 group = idxd->groups[i];
1698                 rc = device_add(group_confdev(group));
1699                 if (rc < 0)
1700                         goto cleanup;
1701         }
1702
1703         return 0;
1704
1705 cleanup:
1706         j = i - 1;
1707         for (; i < idxd->max_groups; i++) {
1708                 group = idxd->groups[i];
1709                 put_device(group_confdev(group));
1710         }
1711
1712         while (j--) {
1713                 group = idxd->groups[j];
1714                 device_unregister(group_confdev(group));
1715         }
1716         return rc;
1717 }
1718
1719 static int idxd_register_wq_devices(struct idxd_device *idxd)
1720 {
1721         struct idxd_wq *wq;
1722         int i, rc, j;
1723
1724         for (i = 0; i < idxd->max_wqs; i++) {
1725                 wq = idxd->wqs[i];
1726                 rc = device_add(wq_confdev(wq));
1727                 if (rc < 0)
1728                         goto cleanup;
1729         }
1730
1731         return 0;
1732
1733 cleanup:
1734         j = i - 1;
1735         for (; i < idxd->max_wqs; i++) {
1736                 wq = idxd->wqs[i];
1737                 put_device(wq_confdev(wq));
1738         }
1739
1740         while (j--) {
1741                 wq = idxd->wqs[j];
1742                 device_unregister(wq_confdev(wq));
1743         }
1744         return rc;
1745 }
1746
1747 int idxd_register_devices(struct idxd_device *idxd)
1748 {
1749         struct device *dev = &idxd->pdev->dev;
1750         int rc, i;
1751
1752         rc = device_add(idxd_confdev(idxd));
1753         if (rc < 0)
1754                 return rc;
1755
1756         rc = idxd_register_wq_devices(idxd);
1757         if (rc < 0) {
1758                 dev_dbg(dev, "WQ devices registering failed: %d\n", rc);
1759                 goto err_wq;
1760         }
1761
1762         rc = idxd_register_engine_devices(idxd);
1763         if (rc < 0) {
1764                 dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
1765                 goto err_engine;
1766         }
1767
1768         rc = idxd_register_group_devices(idxd);
1769         if (rc < 0) {
1770                 dev_dbg(dev, "Group device registering failed: %d\n", rc);
1771                 goto err_group;
1772         }
1773
1774         return 0;
1775
1776  err_group:
1777         for (i = 0; i < idxd->max_engines; i++)
1778                 device_unregister(engine_confdev(idxd->engines[i]));
1779  err_engine:
1780         for (i = 0; i < idxd->max_wqs; i++)
1781                 device_unregister(wq_confdev(idxd->wqs[i]));
1782  err_wq:
1783         device_del(idxd_confdev(idxd));
1784         return rc;
1785 }
1786
1787 void idxd_unregister_devices(struct idxd_device *idxd)
1788 {
1789         int i;
1790
1791         for (i = 0; i < idxd->max_wqs; i++) {
1792                 struct idxd_wq *wq = idxd->wqs[i];
1793
1794                 device_unregister(wq_confdev(wq));
1795         }
1796
1797         for (i = 0; i < idxd->max_engines; i++) {
1798                 struct idxd_engine *engine = idxd->engines[i];
1799
1800                 device_unregister(engine_confdev(engine));
1801         }
1802
1803         for (i = 0; i < idxd->max_groups; i++) {
1804                 struct idxd_group *group = idxd->groups[i];
1805
1806                 device_unregister(group_confdev(group));
1807         }
1808 }
1809
1810 int idxd_register_bus_type(void)
1811 {
1812         return bus_register(&dsa_bus_type);
1813 }
1814
1815 void idxd_unregister_bus_type(void)
1816 {
1817         bus_unregister(&dsa_bus_type);
1818 }