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 input = kstrndup(buf, count, GFP_KERNEL); 952 if (!input) 953 return -ENOMEM; 954 955 pos = strim(input); 956 memset(wq->name, 0, WQ_NAME_SIZE + 1); 957 sprintf(wq->name, "%s", pos); 958 kfree(input); 959 return count; 960 } 961 962 static struct device_attribute dev_attr_wq_name = 963 __ATTR(name, 0644, wq_name_show, wq_name_store); 964 965 static ssize_t wq_cdev_minor_show(struct device *dev, 966 struct device_attribute *attr, char *buf) 967 { 968 struct idxd_wq *wq = confdev_to_wq(dev); 969 int minor = -1; 970 971 mutex_lock(&wq->wq_lock); 972 if (wq->idxd_cdev) 973 minor = wq->idxd_cdev->minor; 974 mutex_unlock(&wq->wq_lock); 975 976 if (minor == -1) 977 return -ENXIO; 978 return sysfs_emit(buf, "%d\n", minor); 979 } 980 981 static struct device_attribute dev_attr_wq_cdev_minor = 982 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL); 983 984 static int __get_sysfs_u64(const char *buf, u64 *val) 985 { 986 int rc; 987 988 rc = kstrtou64(buf, 0, val); 989 if (rc < 0) 990 return -EINVAL; 991 992 if (*val == 0) 993 return -EINVAL; 994 995 *val = roundup_pow_of_two(*val); 996 return 0; 997 } 998 999 static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr, 1000 char *buf) 1001 { 1002 struct idxd_wq *wq = confdev_to_wq(dev); 1003 1004 return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes); 1005 } 1006 1007 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr, 1008 const char *buf, size_t count) 1009 { 1010 struct idxd_wq *wq = confdev_to_wq(dev); 1011 struct idxd_device *idxd = wq->idxd; 1012 u64 xfer_size; 1013 int rc; 1014 1015 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1016 return -EPERM; 1017 1018 if (wq->state != IDXD_WQ_DISABLED) 1019 return -EPERM; 1020 1021 rc = __get_sysfs_u64(buf, &xfer_size); 1022 if (rc < 0) 1023 return rc; 1024 1025 if (xfer_size > idxd->max_xfer_bytes) 1026 return -EINVAL; 1027 1028 wq->max_xfer_bytes = xfer_size; 1029 1030 return count; 1031 } 1032 1033 static struct device_attribute dev_attr_wq_max_transfer_size = 1034 __ATTR(max_transfer_size, 0644, 1035 wq_max_transfer_size_show, wq_max_transfer_size_store); 1036 1037 static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf) 1038 { 1039 struct idxd_wq *wq = confdev_to_wq(dev); 1040 1041 return sysfs_emit(buf, "%u\n", wq->max_batch_size); 1042 } 1043 1044 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr, 1045 const char *buf, size_t count) 1046 { 1047 struct idxd_wq *wq = confdev_to_wq(dev); 1048 struct idxd_device *idxd = wq->idxd; 1049 u64 batch_size; 1050 int rc; 1051 1052 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1053 return -EPERM; 1054 1055 if (wq->state != IDXD_WQ_DISABLED) 1056 return -EPERM; 1057 1058 rc = __get_sysfs_u64(buf, &batch_size); 1059 if (rc < 0) 1060 return rc; 1061 1062 if (batch_size > idxd->max_batch_size) 1063 return -EINVAL; 1064 1065 idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size); 1066 1067 return count; 1068 } 1069 1070 static struct device_attribute dev_attr_wq_max_batch_size = 1071 __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store); 1072 1073 static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf) 1074 { 1075 struct idxd_wq *wq = confdev_to_wq(dev); 1076 1077 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags)); 1078 } 1079 1080 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr, 1081 const char *buf, size_t count) 1082 { 1083 struct idxd_wq *wq = confdev_to_wq(dev); 1084 struct idxd_device *idxd = wq->idxd; 1085 bool ats_dis; 1086 int rc; 1087 1088 if (wq->state != IDXD_WQ_DISABLED) 1089 return -EPERM; 1090 1091 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1092 return -EPERM; 1093 1094 rc = kstrtobool(buf, &ats_dis); 1095 if (rc < 0) 1096 return rc; 1097 1098 if (ats_dis) 1099 set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags); 1100 else 1101 clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags); 1102 1103 return count; 1104 } 1105 1106 static struct device_attribute dev_attr_wq_ats_disable = 1107 __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store); 1108 1109 static ssize_t wq_prs_disable_show(struct device *dev, struct device_attribute *attr, char *buf) 1110 { 1111 struct idxd_wq *wq = confdev_to_wq(dev); 1112 1113 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_PRS_DISABLE, &wq->flags)); 1114 } 1115 1116 static ssize_t wq_prs_disable_store(struct device *dev, struct device_attribute *attr, 1117 const char *buf, size_t count) 1118 { 1119 struct idxd_wq *wq = confdev_to_wq(dev); 1120 struct idxd_device *idxd = wq->idxd; 1121 bool prs_dis; 1122 int rc; 1123 1124 if (wq->state != IDXD_WQ_DISABLED) 1125 return -EPERM; 1126 1127 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1128 return -EPERM; 1129 1130 rc = kstrtobool(buf, &prs_dis); 1131 if (rc < 0) 1132 return rc; 1133 1134 if (prs_dis) { 1135 set_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); 1136 /* when PRS is disabled, BOF needs to be off as well */ 1137 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); 1138 } else { 1139 clear_bit(WQ_FLAG_PRS_DISABLE, &wq->flags); 1140 } 1141 return count; 1142 } 1143 1144 static struct device_attribute dev_attr_wq_prs_disable = 1145 __ATTR(prs_disable, 0644, wq_prs_disable_show, wq_prs_disable_store); 1146 1147 static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf) 1148 { 1149 struct idxd_wq *wq = confdev_to_wq(dev); 1150 struct idxd_device *idxd = wq->idxd; 1151 u32 occup, offset; 1152 1153 if (!idxd->hw.wq_cap.occupancy) 1154 return -EOPNOTSUPP; 1155 1156 offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX); 1157 occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK; 1158 1159 return sysfs_emit(buf, "%u\n", occup); 1160 } 1161 1162 static struct device_attribute dev_attr_wq_occupancy = 1163 __ATTR(occupancy, 0444, wq_occupancy_show, NULL); 1164 1165 static ssize_t wq_enqcmds_retries_show(struct device *dev, 1166 struct device_attribute *attr, char *buf) 1167 { 1168 struct idxd_wq *wq = confdev_to_wq(dev); 1169 1170 if (wq_dedicated(wq)) 1171 return -EOPNOTSUPP; 1172 1173 return sysfs_emit(buf, "%u\n", wq->enqcmds_retries); 1174 } 1175 1176 static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr, 1177 const char *buf, size_t count) 1178 { 1179 struct idxd_wq *wq = confdev_to_wq(dev); 1180 int rc; 1181 unsigned int retries; 1182 1183 if (wq_dedicated(wq)) 1184 return -EOPNOTSUPP; 1185 1186 rc = kstrtouint(buf, 10, &retries); 1187 if (rc < 0) 1188 return rc; 1189 1190 if (retries > IDXD_ENQCMDS_MAX_RETRIES) 1191 retries = IDXD_ENQCMDS_MAX_RETRIES; 1192 1193 wq->enqcmds_retries = retries; 1194 return count; 1195 } 1196 1197 static struct device_attribute dev_attr_wq_enqcmds_retries = 1198 __ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store); 1199 1200 static ssize_t op_cap_show_common(struct device *dev, char *buf, unsigned long *opcap_bmap) 1201 { 1202 ssize_t pos; 1203 int i; 1204 1205 pos = 0; 1206 for (i = IDXD_MAX_OPCAP_BITS/64 - 1; i >= 0; i--) { 1207 unsigned long val = opcap_bmap[i]; 1208 1209 /* On systems where direct user submissions are not safe, we need to clear out 1210 * the BATCH capability from the capability mask in sysfs since we cannot support 1211 * that command on such systems. 1212 */ 1213 if (i == DSA_OPCODE_BATCH/64 && !confdev_to_idxd(dev)->user_submission_safe) 1214 clear_bit(DSA_OPCODE_BATCH % 64, &val); 1215 1216 pos += sysfs_emit_at(buf, pos, "%*pb", 64, &val); 1217 pos += sysfs_emit_at(buf, pos, "%c", i == 0 ? '\n' : ','); 1218 } 1219 1220 return pos; 1221 } 1222 1223 static ssize_t wq_op_config_show(struct device *dev, 1224 struct device_attribute *attr, char *buf) 1225 { 1226 struct idxd_wq *wq = confdev_to_wq(dev); 1227 1228 return op_cap_show_common(dev, buf, wq->opcap_bmap); 1229 } 1230 1231 static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask) 1232 { 1233 int bit; 1234 1235 /* 1236 * The OPCAP is defined as 256 bits that represents each operation the device 1237 * supports per bit. Iterate through all the bits and check if the input mask 1238 * is set for bits that are not set in the OPCAP for the device. If no OPCAP 1239 * bit is set and input mask has the bit set, then return error. 1240 */ 1241 for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) { 1242 if (!test_bit(bit, idxd->opcap_bmap)) 1243 return -EINVAL; 1244 } 1245 1246 return 0; 1247 } 1248 1249 static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr, 1250 const char *buf, size_t count) 1251 { 1252 struct idxd_wq *wq = confdev_to_wq(dev); 1253 struct idxd_device *idxd = wq->idxd; 1254 unsigned long *opmask; 1255 int rc; 1256 1257 if (wq->state != IDXD_WQ_DISABLED) 1258 return -EPERM; 1259 1260 opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL); 1261 if (!opmask) 1262 return -ENOMEM; 1263 1264 rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS); 1265 if (rc < 0) 1266 goto err; 1267 1268 rc = idxd_verify_supported_opcap(idxd, opmask); 1269 if (rc < 0) 1270 goto err; 1271 1272 bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS); 1273 1274 bitmap_free(opmask); 1275 return count; 1276 1277 err: 1278 bitmap_free(opmask); 1279 return rc; 1280 } 1281 1282 static struct device_attribute dev_attr_wq_op_config = 1283 __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store); 1284 1285 static struct attribute *idxd_wq_attributes[] = { 1286 &dev_attr_wq_clients.attr, 1287 &dev_attr_wq_state.attr, 1288 &dev_attr_wq_group_id.attr, 1289 &dev_attr_wq_mode.attr, 1290 &dev_attr_wq_size.attr, 1291 &dev_attr_wq_priority.attr, 1292 &dev_attr_wq_block_on_fault.attr, 1293 &dev_attr_wq_threshold.attr, 1294 &dev_attr_wq_type.attr, 1295 &dev_attr_wq_name.attr, 1296 &dev_attr_wq_cdev_minor.attr, 1297 &dev_attr_wq_max_transfer_size.attr, 1298 &dev_attr_wq_max_batch_size.attr, 1299 &dev_attr_wq_ats_disable.attr, 1300 &dev_attr_wq_prs_disable.attr, 1301 &dev_attr_wq_occupancy.attr, 1302 &dev_attr_wq_enqcmds_retries.attr, 1303 &dev_attr_wq_op_config.attr, 1304 NULL, 1305 }; 1306 1307 /* A WQ attr is invisible if the feature is not supported in WQCAP. */ 1308 #define idxd_wq_attr_invisible(name, cap_field, a, idxd) \ 1309 ((a) == &dev_attr_wq_##name.attr && !(idxd)->hw.wq_cap.cap_field) 1310 1311 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr, 1312 struct idxd_device *idxd) 1313 { 1314 /* Intel IAA does not support batch processing, make it invisible */ 1315 return attr == &dev_attr_wq_max_batch_size.attr && 1316 idxd->data->type == IDXD_TYPE_IAX; 1317 } 1318 1319 static umode_t idxd_wq_attr_visible(struct kobject *kobj, 1320 struct attribute *attr, int n) 1321 { 1322 struct device *dev = container_of(kobj, struct device, kobj); 1323 struct idxd_wq *wq = confdev_to_wq(dev); 1324 struct idxd_device *idxd = wq->idxd; 1325 1326 if (idxd_wq_attr_invisible(op_config, op_config, attr, idxd)) 1327 return 0; 1328 1329 if (idxd_wq_attr_max_batch_size_invisible(attr, idxd)) 1330 return 0; 1331 1332 if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd)) 1333 return 0; 1334 1335 if (idxd_wq_attr_invisible(ats_disable, wq_ats_support, attr, idxd)) 1336 return 0; 1337 1338 return attr->mode; 1339 } 1340 1341 static const struct attribute_group idxd_wq_attribute_group = { 1342 .attrs = idxd_wq_attributes, 1343 .is_visible = idxd_wq_attr_visible, 1344 }; 1345 1346 static const struct attribute_group *idxd_wq_attribute_groups[] = { 1347 &idxd_wq_attribute_group, 1348 NULL, 1349 }; 1350 1351 static void idxd_conf_wq_release(struct device *dev) 1352 { 1353 struct idxd_wq *wq = confdev_to_wq(dev); 1354 1355 bitmap_free(wq->opcap_bmap); 1356 kfree(wq->wqcfg); 1357 xa_destroy(&wq->upasid_xa); 1358 kfree(wq); 1359 } 1360 1361 struct device_type idxd_wq_device_type = { 1362 .name = "wq", 1363 .release = idxd_conf_wq_release, 1364 .groups = idxd_wq_attribute_groups, 1365 }; 1366 1367 /* IDXD device attribs */ 1368 static ssize_t version_show(struct device *dev, struct device_attribute *attr, 1369 char *buf) 1370 { 1371 struct idxd_device *idxd = confdev_to_idxd(dev); 1372 1373 return sysfs_emit(buf, "%#x\n", idxd->hw.version); 1374 } 1375 static DEVICE_ATTR_RO(version); 1376 1377 static ssize_t max_work_queues_size_show(struct device *dev, 1378 struct device_attribute *attr, 1379 char *buf) 1380 { 1381 struct idxd_device *idxd = confdev_to_idxd(dev); 1382 1383 return sysfs_emit(buf, "%u\n", idxd->max_wq_size); 1384 } 1385 static DEVICE_ATTR_RO(max_work_queues_size); 1386 1387 static ssize_t max_groups_show(struct device *dev, 1388 struct device_attribute *attr, char *buf) 1389 { 1390 struct idxd_device *idxd = confdev_to_idxd(dev); 1391 1392 return sysfs_emit(buf, "%u\n", idxd->max_groups); 1393 } 1394 static DEVICE_ATTR_RO(max_groups); 1395 1396 static ssize_t max_work_queues_show(struct device *dev, 1397 struct device_attribute *attr, char *buf) 1398 { 1399 struct idxd_device *idxd = confdev_to_idxd(dev); 1400 1401 return sysfs_emit(buf, "%u\n", idxd->max_wqs); 1402 } 1403 static DEVICE_ATTR_RO(max_work_queues); 1404 1405 static ssize_t max_engines_show(struct device *dev, 1406 struct device_attribute *attr, char *buf) 1407 { 1408 struct idxd_device *idxd = confdev_to_idxd(dev); 1409 1410 return sysfs_emit(buf, "%u\n", idxd->max_engines); 1411 } 1412 static DEVICE_ATTR_RO(max_engines); 1413 1414 static ssize_t numa_node_show(struct device *dev, 1415 struct device_attribute *attr, char *buf) 1416 { 1417 struct idxd_device *idxd = confdev_to_idxd(dev); 1418 1419 return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); 1420 } 1421 static DEVICE_ATTR_RO(numa_node); 1422 1423 static ssize_t max_batch_size_show(struct device *dev, 1424 struct device_attribute *attr, char *buf) 1425 { 1426 struct idxd_device *idxd = confdev_to_idxd(dev); 1427 1428 return sysfs_emit(buf, "%u\n", idxd->max_batch_size); 1429 } 1430 static DEVICE_ATTR_RO(max_batch_size); 1431 1432 static ssize_t max_transfer_size_show(struct device *dev, 1433 struct device_attribute *attr, 1434 char *buf) 1435 { 1436 struct idxd_device *idxd = confdev_to_idxd(dev); 1437 1438 return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes); 1439 } 1440 static DEVICE_ATTR_RO(max_transfer_size); 1441 1442 static ssize_t op_cap_show(struct device *dev, 1443 struct device_attribute *attr, char *buf) 1444 { 1445 struct idxd_device *idxd = confdev_to_idxd(dev); 1446 1447 return op_cap_show_common(dev, buf, idxd->opcap_bmap); 1448 } 1449 static DEVICE_ATTR_RO(op_cap); 1450 1451 static ssize_t gen_cap_show(struct device *dev, 1452 struct device_attribute *attr, char *buf) 1453 { 1454 struct idxd_device *idxd = confdev_to_idxd(dev); 1455 1456 return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits); 1457 } 1458 static DEVICE_ATTR_RO(gen_cap); 1459 1460 static ssize_t configurable_show(struct device *dev, 1461 struct device_attribute *attr, char *buf) 1462 { 1463 struct idxd_device *idxd = confdev_to_idxd(dev); 1464 1465 return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); 1466 } 1467 static DEVICE_ATTR_RO(configurable); 1468 1469 static ssize_t clients_show(struct device *dev, 1470 struct device_attribute *attr, char *buf) 1471 { 1472 struct idxd_device *idxd = confdev_to_idxd(dev); 1473 int count = 0, i; 1474 1475 spin_lock(&idxd->dev_lock); 1476 for (i = 0; i < idxd->max_wqs; i++) { 1477 struct idxd_wq *wq = idxd->wqs[i]; 1478 1479 count += wq->client_count; 1480 } 1481 spin_unlock(&idxd->dev_lock); 1482 1483 return sysfs_emit(buf, "%d\n", count); 1484 } 1485 static DEVICE_ATTR_RO(clients); 1486 1487 static ssize_t pasid_enabled_show(struct device *dev, 1488 struct device_attribute *attr, char *buf) 1489 { 1490 struct idxd_device *idxd = confdev_to_idxd(dev); 1491 1492 return sysfs_emit(buf, "%u\n", device_user_pasid_enabled(idxd)); 1493 } 1494 static DEVICE_ATTR_RO(pasid_enabled); 1495 1496 static ssize_t state_show(struct device *dev, 1497 struct device_attribute *attr, char *buf) 1498 { 1499 struct idxd_device *idxd = confdev_to_idxd(dev); 1500 1501 switch (idxd->state) { 1502 case IDXD_DEV_DISABLED: 1503 return sysfs_emit(buf, "disabled\n"); 1504 case IDXD_DEV_ENABLED: 1505 return sysfs_emit(buf, "enabled\n"); 1506 case IDXD_DEV_HALTED: 1507 return sysfs_emit(buf, "halted\n"); 1508 } 1509 1510 return sysfs_emit(buf, "unknown\n"); 1511 } 1512 static DEVICE_ATTR_RO(state); 1513 1514 static ssize_t errors_show(struct device *dev, 1515 struct device_attribute *attr, char *buf) 1516 { 1517 struct idxd_device *idxd = confdev_to_idxd(dev); 1518 DECLARE_BITMAP(swerr_bmap, 256); 1519 1520 bitmap_zero(swerr_bmap, 256); 1521 spin_lock(&idxd->dev_lock); 1522 multi_u64_to_bmap(swerr_bmap, &idxd->sw_err.bits[0], 4); 1523 spin_unlock(&idxd->dev_lock); 1524 return sysfs_emit(buf, "%*pb\n", 256, swerr_bmap); 1525 } 1526 static DEVICE_ATTR_RO(errors); 1527 1528 static ssize_t max_read_buffers_show(struct device *dev, 1529 struct device_attribute *attr, char *buf) 1530 { 1531 struct idxd_device *idxd = confdev_to_idxd(dev); 1532 1533 return sysfs_emit(buf, "%u\n", idxd->max_rdbufs); 1534 } 1535 1536 static ssize_t max_tokens_show(struct device *dev, 1537 struct device_attribute *attr, char *buf) 1538 { 1539 dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n"); 1540 return max_read_buffers_show(dev, attr, buf); 1541 } 1542 1543 static DEVICE_ATTR_RO(max_tokens); /* deprecated */ 1544 static DEVICE_ATTR_RO(max_read_buffers); 1545 1546 static ssize_t read_buffer_limit_show(struct device *dev, 1547 struct device_attribute *attr, char *buf) 1548 { 1549 struct idxd_device *idxd = confdev_to_idxd(dev); 1550 1551 return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit); 1552 } 1553 1554 static ssize_t token_limit_show(struct device *dev, 1555 struct device_attribute *attr, char *buf) 1556 { 1557 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n"); 1558 return read_buffer_limit_show(dev, attr, buf); 1559 } 1560 1561 static ssize_t read_buffer_limit_store(struct device *dev, 1562 struct device_attribute *attr, 1563 const char *buf, size_t count) 1564 { 1565 struct idxd_device *idxd = confdev_to_idxd(dev); 1566 unsigned long val; 1567 int rc; 1568 1569 rc = kstrtoul(buf, 10, &val); 1570 if (rc < 0) 1571 return -EINVAL; 1572 1573 if (idxd->state == IDXD_DEV_ENABLED) 1574 return -EPERM; 1575 1576 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1577 return -EPERM; 1578 1579 if (!idxd->hw.group_cap.rdbuf_limit) 1580 return -EPERM; 1581 1582 if (val > idxd->hw.group_cap.total_rdbufs) 1583 return -EINVAL; 1584 1585 idxd->rdbuf_limit = val; 1586 return count; 1587 } 1588 1589 static ssize_t token_limit_store(struct device *dev, 1590 struct device_attribute *attr, 1591 const char *buf, size_t count) 1592 { 1593 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n"); 1594 return read_buffer_limit_store(dev, attr, buf, count); 1595 } 1596 1597 static DEVICE_ATTR_RW(token_limit); /* deprecated */ 1598 static DEVICE_ATTR_RW(read_buffer_limit); 1599 1600 static ssize_t cdev_major_show(struct device *dev, 1601 struct device_attribute *attr, char *buf) 1602 { 1603 struct idxd_device *idxd = confdev_to_idxd(dev); 1604 1605 return sysfs_emit(buf, "%u\n", idxd->major); 1606 } 1607 static DEVICE_ATTR_RO(cdev_major); 1608 1609 static ssize_t cmd_status_show(struct device *dev, 1610 struct device_attribute *attr, char *buf) 1611 { 1612 struct idxd_device *idxd = confdev_to_idxd(dev); 1613 1614 return sysfs_emit(buf, "%#x\n", idxd->cmd_status); 1615 } 1616 1617 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr, 1618 const char *buf, size_t count) 1619 { 1620 struct idxd_device *idxd = confdev_to_idxd(dev); 1621 1622 idxd->cmd_status = 0; 1623 return count; 1624 } 1625 static DEVICE_ATTR_RW(cmd_status); 1626 1627 static ssize_t iaa_cap_show(struct device *dev, 1628 struct device_attribute *attr, char *buf) 1629 { 1630 struct idxd_device *idxd = confdev_to_idxd(dev); 1631 1632 if (idxd->hw.version < DEVICE_VERSION_2) 1633 return -EOPNOTSUPP; 1634 1635 return sysfs_emit(buf, "%#llx\n", idxd->hw.iaa_cap.bits); 1636 } 1637 static DEVICE_ATTR_RO(iaa_cap); 1638 1639 static ssize_t event_log_size_show(struct device *dev, 1640 struct device_attribute *attr, char *buf) 1641 { 1642 struct idxd_device *idxd = confdev_to_idxd(dev); 1643 1644 if (!idxd->evl) 1645 return -EOPNOTSUPP; 1646 1647 return sysfs_emit(buf, "%u\n", idxd->evl->size); 1648 } 1649 1650 static ssize_t event_log_size_store(struct device *dev, 1651 struct device_attribute *attr, 1652 const char *buf, size_t count) 1653 { 1654 struct idxd_device *idxd = confdev_to_idxd(dev); 1655 unsigned long val; 1656 int rc; 1657 1658 if (!idxd->evl) 1659 return -EOPNOTSUPP; 1660 1661 rc = kstrtoul(buf, 10, &val); 1662 if (rc < 0) 1663 return -EINVAL; 1664 1665 if (idxd->state == IDXD_DEV_ENABLED) 1666 return -EPERM; 1667 1668 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1669 return -EPERM; 1670 1671 if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX || 1672 (val * evl_ent_size(idxd) > ULONG_MAX - idxd->evl->dma)) 1673 return -EINVAL; 1674 1675 idxd->evl->size = val; 1676 return count; 1677 } 1678 static DEVICE_ATTR_RW(event_log_size); 1679 1680 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr, 1681 struct idxd_device *idxd) 1682 { 1683 /* Intel IAA does not support batch processing, make it invisible */ 1684 return attr == &dev_attr_max_batch_size.attr && 1685 idxd->data->type == IDXD_TYPE_IAX; 1686 } 1687 1688 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr, 1689 struct idxd_device *idxd) 1690 { 1691 /* 1692 * Intel IAA does not support Read Buffer allocation control, 1693 * make these attributes invisible. 1694 */ 1695 return (attr == &dev_attr_max_tokens.attr || 1696 attr == &dev_attr_max_read_buffers.attr || 1697 attr == &dev_attr_token_limit.attr || 1698 attr == &dev_attr_read_buffer_limit.attr) && 1699 idxd->data->type == IDXD_TYPE_IAX; 1700 } 1701 1702 static bool idxd_device_attr_iaa_cap_invisible(struct attribute *attr, 1703 struct idxd_device *idxd) 1704 { 1705 return attr == &dev_attr_iaa_cap.attr && 1706 (idxd->data->type != IDXD_TYPE_IAX || 1707 idxd->hw.version < DEVICE_VERSION_2); 1708 } 1709 1710 static bool idxd_device_attr_event_log_size_invisible(struct attribute *attr, 1711 struct idxd_device *idxd) 1712 { 1713 return (attr == &dev_attr_event_log_size.attr && 1714 !idxd->hw.gen_cap.evl_support); 1715 } 1716 1717 static umode_t idxd_device_attr_visible(struct kobject *kobj, 1718 struct attribute *attr, int n) 1719 { 1720 struct device *dev = container_of(kobj, struct device, kobj); 1721 struct idxd_device *idxd = confdev_to_idxd(dev); 1722 1723 if (idxd_device_attr_max_batch_size_invisible(attr, idxd)) 1724 return 0; 1725 1726 if (idxd_device_attr_read_buffers_invisible(attr, idxd)) 1727 return 0; 1728 1729 if (idxd_device_attr_iaa_cap_invisible(attr, idxd)) 1730 return 0; 1731 1732 if (idxd_device_attr_event_log_size_invisible(attr, idxd)) 1733 return 0; 1734 1735 return attr->mode; 1736 } 1737 1738 static struct attribute *idxd_device_attributes[] = { 1739 &dev_attr_version.attr, 1740 &dev_attr_max_groups.attr, 1741 &dev_attr_max_work_queues.attr, 1742 &dev_attr_max_work_queues_size.attr, 1743 &dev_attr_max_engines.attr, 1744 &dev_attr_numa_node.attr, 1745 &dev_attr_max_batch_size.attr, 1746 &dev_attr_max_transfer_size.attr, 1747 &dev_attr_op_cap.attr, 1748 &dev_attr_gen_cap.attr, 1749 &dev_attr_configurable.attr, 1750 &dev_attr_clients.attr, 1751 &dev_attr_pasid_enabled.attr, 1752 &dev_attr_state.attr, 1753 &dev_attr_errors.attr, 1754 &dev_attr_max_tokens.attr, 1755 &dev_attr_max_read_buffers.attr, 1756 &dev_attr_token_limit.attr, 1757 &dev_attr_read_buffer_limit.attr, 1758 &dev_attr_cdev_major.attr, 1759 &dev_attr_cmd_status.attr, 1760 &dev_attr_iaa_cap.attr, 1761 &dev_attr_event_log_size.attr, 1762 NULL, 1763 }; 1764 1765 static const struct attribute_group idxd_device_attribute_group = { 1766 .attrs = idxd_device_attributes, 1767 .is_visible = idxd_device_attr_visible, 1768 }; 1769 1770 static const struct attribute_group *idxd_attribute_groups[] = { 1771 &idxd_device_attribute_group, 1772 NULL, 1773 }; 1774 1775 static void idxd_conf_device_release(struct device *dev) 1776 { 1777 struct idxd_device *idxd = confdev_to_idxd(dev); 1778 1779 kfree(idxd->groups); 1780 bitmap_free(idxd->wq_enable_map); 1781 kfree(idxd->wqs); 1782 kfree(idxd->engines); 1783 kfree(idxd->evl); 1784 kmem_cache_destroy(idxd->evl_cache); 1785 ida_free(&idxd_ida, idxd->id); 1786 bitmap_free(idxd->opcap_bmap); 1787 kfree(idxd); 1788 } 1789 1790 struct device_type dsa_device_type = { 1791 .name = "dsa", 1792 .release = idxd_conf_device_release, 1793 .groups = idxd_attribute_groups, 1794 }; 1795 1796 struct device_type iax_device_type = { 1797 .name = "iax", 1798 .release = idxd_conf_device_release, 1799 .groups = idxd_attribute_groups, 1800 }; 1801 1802 static int idxd_register_engine_devices(struct idxd_device *idxd) 1803 { 1804 struct idxd_engine *engine; 1805 int i, j, rc; 1806 1807 for (i = 0; i < idxd->max_engines; i++) { 1808 engine = idxd->engines[i]; 1809 rc = device_add(engine_confdev(engine)); 1810 if (rc < 0) 1811 goto cleanup; 1812 } 1813 1814 return 0; 1815 1816 cleanup: 1817 j = i - 1; 1818 for (; i < idxd->max_engines; i++) { 1819 engine = idxd->engines[i]; 1820 put_device(engine_confdev(engine)); 1821 } 1822 1823 while (j--) { 1824 engine = idxd->engines[j]; 1825 device_unregister(engine_confdev(engine)); 1826 } 1827 return rc; 1828 } 1829 1830 static int idxd_register_group_devices(struct idxd_device *idxd) 1831 { 1832 struct idxd_group *group; 1833 int i, j, rc; 1834 1835 for (i = 0; i < idxd->max_groups; i++) { 1836 group = idxd->groups[i]; 1837 rc = device_add(group_confdev(group)); 1838 if (rc < 0) 1839 goto cleanup; 1840 } 1841 1842 return 0; 1843 1844 cleanup: 1845 j = i - 1; 1846 for (; i < idxd->max_groups; i++) { 1847 group = idxd->groups[i]; 1848 put_device(group_confdev(group)); 1849 } 1850 1851 while (j--) { 1852 group = idxd->groups[j]; 1853 device_unregister(group_confdev(group)); 1854 } 1855 return rc; 1856 } 1857 1858 static int idxd_register_wq_devices(struct idxd_device *idxd) 1859 { 1860 struct idxd_wq *wq; 1861 int i, rc, j; 1862 1863 for (i = 0; i < idxd->max_wqs; i++) { 1864 wq = idxd->wqs[i]; 1865 rc = device_add(wq_confdev(wq)); 1866 if (rc < 0) 1867 goto cleanup; 1868 } 1869 1870 return 0; 1871 1872 cleanup: 1873 j = i - 1; 1874 for (; i < idxd->max_wqs; i++) { 1875 wq = idxd->wqs[i]; 1876 put_device(wq_confdev(wq)); 1877 } 1878 1879 while (j--) { 1880 wq = idxd->wqs[j]; 1881 device_unregister(wq_confdev(wq)); 1882 } 1883 return rc; 1884 } 1885 1886 int idxd_register_devices(struct idxd_device *idxd) 1887 { 1888 struct device *dev = &idxd->pdev->dev; 1889 int rc, i; 1890 1891 rc = device_add(idxd_confdev(idxd)); 1892 if (rc < 0) 1893 return rc; 1894 1895 rc = idxd_register_wq_devices(idxd); 1896 if (rc < 0) { 1897 dev_dbg(dev, "WQ devices registering failed: %d\n", rc); 1898 goto err_wq; 1899 } 1900 1901 rc = idxd_register_engine_devices(idxd); 1902 if (rc < 0) { 1903 dev_dbg(dev, "Engine devices registering failed: %d\n", rc); 1904 goto err_engine; 1905 } 1906 1907 rc = idxd_register_group_devices(idxd); 1908 if (rc < 0) { 1909 dev_dbg(dev, "Group device registering failed: %d\n", rc); 1910 goto err_group; 1911 } 1912 1913 return 0; 1914 1915 err_group: 1916 for (i = 0; i < idxd->max_engines; i++) 1917 device_unregister(engine_confdev(idxd->engines[i])); 1918 err_engine: 1919 for (i = 0; i < idxd->max_wqs; i++) 1920 device_unregister(wq_confdev(idxd->wqs[i])); 1921 err_wq: 1922 device_del(idxd_confdev(idxd)); 1923 return rc; 1924 } 1925 1926 void idxd_unregister_devices(struct idxd_device *idxd) 1927 { 1928 int i; 1929 1930 for (i = 0; i < idxd->max_wqs; i++) { 1931 struct idxd_wq *wq = idxd->wqs[i]; 1932 1933 device_unregister(wq_confdev(wq)); 1934 } 1935 1936 for (i = 0; i < idxd->max_engines; i++) { 1937 struct idxd_engine *engine = idxd->engines[i]; 1938 1939 device_unregister(engine_confdev(engine)); 1940 } 1941 1942 for (i = 0; i < idxd->max_groups; i++) { 1943 struct idxd_group *group = idxd->groups[i]; 1944 1945 device_unregister(group_confdev(group)); 1946 } 1947 } 1948 1949 int idxd_register_bus_type(void) 1950 { 1951 return bus_register(&dsa_bus_type); 1952 } 1953 1954 void idxd_unregister_bus_type(void) 1955 { 1956 bus_unregister(&dsa_bus_type); 1957 } 1958