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 const 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 const 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 ssize_t wq_driver_name_show(struct device *dev, struct device_attribute *attr, char *buf) 1286 { 1287 struct idxd_wq *wq = confdev_to_wq(dev); 1288 1289 return sysfs_emit(buf, "%s\n", wq->driver_name); 1290 } 1291 1292 static ssize_t wq_driver_name_store(struct device *dev, struct device_attribute *attr, 1293 const char *buf, size_t count) 1294 { 1295 struct idxd_wq *wq = confdev_to_wq(dev); 1296 char *input, *pos; 1297 1298 if (wq->state != IDXD_WQ_DISABLED) 1299 return -EPERM; 1300 1301 if (strlen(buf) > DRIVER_NAME_SIZE || strlen(buf) == 0) 1302 return -EINVAL; 1303 1304 input = kstrndup(buf, count, GFP_KERNEL); 1305 if (!input) 1306 return -ENOMEM; 1307 1308 pos = strim(input); 1309 memset(wq->driver_name, 0, DRIVER_NAME_SIZE + 1); 1310 sprintf(wq->driver_name, "%s", pos); 1311 kfree(input); 1312 return count; 1313 } 1314 1315 static struct device_attribute dev_attr_wq_driver_name = 1316 __ATTR(driver_name, 0644, wq_driver_name_show, wq_driver_name_store); 1317 1318 static struct attribute *idxd_wq_attributes[] = { 1319 &dev_attr_wq_clients.attr, 1320 &dev_attr_wq_state.attr, 1321 &dev_attr_wq_group_id.attr, 1322 &dev_attr_wq_mode.attr, 1323 &dev_attr_wq_size.attr, 1324 &dev_attr_wq_priority.attr, 1325 &dev_attr_wq_block_on_fault.attr, 1326 &dev_attr_wq_threshold.attr, 1327 &dev_attr_wq_type.attr, 1328 &dev_attr_wq_name.attr, 1329 &dev_attr_wq_cdev_minor.attr, 1330 &dev_attr_wq_max_transfer_size.attr, 1331 &dev_attr_wq_max_batch_size.attr, 1332 &dev_attr_wq_ats_disable.attr, 1333 &dev_attr_wq_prs_disable.attr, 1334 &dev_attr_wq_occupancy.attr, 1335 &dev_attr_wq_enqcmds_retries.attr, 1336 &dev_attr_wq_op_config.attr, 1337 &dev_attr_wq_driver_name.attr, 1338 NULL, 1339 }; 1340 1341 /* A WQ attr is invisible if the feature is not supported in WQCAP. */ 1342 #define idxd_wq_attr_invisible(name, cap_field, a, idxd) \ 1343 ((a) == &dev_attr_wq_##name.attr && !(idxd)->hw.wq_cap.cap_field) 1344 1345 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr, 1346 struct idxd_device *idxd) 1347 { 1348 /* Intel IAA does not support batch processing, make it invisible */ 1349 return attr == &dev_attr_wq_max_batch_size.attr && 1350 idxd->data->type == IDXD_TYPE_IAX; 1351 } 1352 1353 static umode_t idxd_wq_attr_visible(struct kobject *kobj, 1354 struct attribute *attr, int n) 1355 { 1356 struct device *dev = container_of(kobj, struct device, kobj); 1357 struct idxd_wq *wq = confdev_to_wq(dev); 1358 struct idxd_device *idxd = wq->idxd; 1359 1360 if (idxd_wq_attr_invisible(op_config, op_config, attr, idxd)) 1361 return 0; 1362 1363 if (idxd_wq_attr_max_batch_size_invisible(attr, idxd)) 1364 return 0; 1365 1366 if (idxd_wq_attr_invisible(prs_disable, wq_prs_support, attr, idxd)) 1367 return 0; 1368 1369 if (idxd_wq_attr_invisible(ats_disable, wq_ats_support, attr, idxd)) 1370 return 0; 1371 1372 return attr->mode; 1373 } 1374 1375 static const struct attribute_group idxd_wq_attribute_group = { 1376 .attrs = idxd_wq_attributes, 1377 .is_visible = idxd_wq_attr_visible, 1378 }; 1379 1380 static const struct attribute_group *idxd_wq_attribute_groups[] = { 1381 &idxd_wq_attribute_group, 1382 NULL, 1383 }; 1384 1385 static void idxd_conf_wq_release(struct device *dev) 1386 { 1387 struct idxd_wq *wq = confdev_to_wq(dev); 1388 1389 bitmap_free(wq->opcap_bmap); 1390 kfree(wq->wqcfg); 1391 xa_destroy(&wq->upasid_xa); 1392 kfree(wq); 1393 } 1394 1395 const struct device_type idxd_wq_device_type = { 1396 .name = "wq", 1397 .release = idxd_conf_wq_release, 1398 .groups = idxd_wq_attribute_groups, 1399 }; 1400 1401 /* IDXD device attribs */ 1402 static ssize_t version_show(struct device *dev, struct device_attribute *attr, 1403 char *buf) 1404 { 1405 struct idxd_device *idxd = confdev_to_idxd(dev); 1406 1407 return sysfs_emit(buf, "%#x\n", idxd->hw.version); 1408 } 1409 static DEVICE_ATTR_RO(version); 1410 1411 static ssize_t max_work_queues_size_show(struct device *dev, 1412 struct device_attribute *attr, 1413 char *buf) 1414 { 1415 struct idxd_device *idxd = confdev_to_idxd(dev); 1416 1417 return sysfs_emit(buf, "%u\n", idxd->max_wq_size); 1418 } 1419 static DEVICE_ATTR_RO(max_work_queues_size); 1420 1421 static ssize_t max_groups_show(struct device *dev, 1422 struct device_attribute *attr, char *buf) 1423 { 1424 struct idxd_device *idxd = confdev_to_idxd(dev); 1425 1426 return sysfs_emit(buf, "%u\n", idxd->max_groups); 1427 } 1428 static DEVICE_ATTR_RO(max_groups); 1429 1430 static ssize_t max_work_queues_show(struct device *dev, 1431 struct device_attribute *attr, char *buf) 1432 { 1433 struct idxd_device *idxd = confdev_to_idxd(dev); 1434 1435 return sysfs_emit(buf, "%u\n", idxd->max_wqs); 1436 } 1437 static DEVICE_ATTR_RO(max_work_queues); 1438 1439 static ssize_t max_engines_show(struct device *dev, 1440 struct device_attribute *attr, char *buf) 1441 { 1442 struct idxd_device *idxd = confdev_to_idxd(dev); 1443 1444 return sysfs_emit(buf, "%u\n", idxd->max_engines); 1445 } 1446 static DEVICE_ATTR_RO(max_engines); 1447 1448 static ssize_t numa_node_show(struct device *dev, 1449 struct device_attribute *attr, char *buf) 1450 { 1451 struct idxd_device *idxd = confdev_to_idxd(dev); 1452 1453 return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); 1454 } 1455 static DEVICE_ATTR_RO(numa_node); 1456 1457 static ssize_t max_batch_size_show(struct device *dev, 1458 struct device_attribute *attr, char *buf) 1459 { 1460 struct idxd_device *idxd = confdev_to_idxd(dev); 1461 1462 return sysfs_emit(buf, "%u\n", idxd->max_batch_size); 1463 } 1464 static DEVICE_ATTR_RO(max_batch_size); 1465 1466 static ssize_t max_transfer_size_show(struct device *dev, 1467 struct device_attribute *attr, 1468 char *buf) 1469 { 1470 struct idxd_device *idxd = confdev_to_idxd(dev); 1471 1472 return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes); 1473 } 1474 static DEVICE_ATTR_RO(max_transfer_size); 1475 1476 static ssize_t op_cap_show(struct device *dev, 1477 struct device_attribute *attr, char *buf) 1478 { 1479 struct idxd_device *idxd = confdev_to_idxd(dev); 1480 1481 return op_cap_show_common(dev, buf, idxd->opcap_bmap); 1482 } 1483 static DEVICE_ATTR_RO(op_cap); 1484 1485 static ssize_t gen_cap_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, "%#llx\n", idxd->hw.gen_cap.bits); 1491 } 1492 static DEVICE_ATTR_RO(gen_cap); 1493 1494 static ssize_t configurable_show(struct device *dev, 1495 struct device_attribute *attr, char *buf) 1496 { 1497 struct idxd_device *idxd = confdev_to_idxd(dev); 1498 1499 return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); 1500 } 1501 static DEVICE_ATTR_RO(configurable); 1502 1503 static ssize_t clients_show(struct device *dev, 1504 struct device_attribute *attr, char *buf) 1505 { 1506 struct idxd_device *idxd = confdev_to_idxd(dev); 1507 int count = 0, i; 1508 1509 spin_lock(&idxd->dev_lock); 1510 for (i = 0; i < idxd->max_wqs; i++) { 1511 struct idxd_wq *wq = idxd->wqs[i]; 1512 1513 count += wq->client_count; 1514 } 1515 spin_unlock(&idxd->dev_lock); 1516 1517 return sysfs_emit(buf, "%d\n", count); 1518 } 1519 static DEVICE_ATTR_RO(clients); 1520 1521 static ssize_t pasid_enabled_show(struct device *dev, 1522 struct device_attribute *attr, char *buf) 1523 { 1524 struct idxd_device *idxd = confdev_to_idxd(dev); 1525 1526 return sysfs_emit(buf, "%u\n", device_user_pasid_enabled(idxd)); 1527 } 1528 static DEVICE_ATTR_RO(pasid_enabled); 1529 1530 static ssize_t state_show(struct device *dev, 1531 struct device_attribute *attr, char *buf) 1532 { 1533 struct idxd_device *idxd = confdev_to_idxd(dev); 1534 1535 switch (idxd->state) { 1536 case IDXD_DEV_DISABLED: 1537 return sysfs_emit(buf, "disabled\n"); 1538 case IDXD_DEV_ENABLED: 1539 return sysfs_emit(buf, "enabled\n"); 1540 case IDXD_DEV_HALTED: 1541 return sysfs_emit(buf, "halted\n"); 1542 } 1543 1544 return sysfs_emit(buf, "unknown\n"); 1545 } 1546 static DEVICE_ATTR_RO(state); 1547 1548 static ssize_t errors_show(struct device *dev, 1549 struct device_attribute *attr, char *buf) 1550 { 1551 struct idxd_device *idxd = confdev_to_idxd(dev); 1552 DECLARE_BITMAP(swerr_bmap, 256); 1553 1554 bitmap_zero(swerr_bmap, 256); 1555 spin_lock(&idxd->dev_lock); 1556 multi_u64_to_bmap(swerr_bmap, &idxd->sw_err.bits[0], 4); 1557 spin_unlock(&idxd->dev_lock); 1558 return sysfs_emit(buf, "%*pb\n", 256, swerr_bmap); 1559 } 1560 static DEVICE_ATTR_RO(errors); 1561 1562 static ssize_t max_read_buffers_show(struct device *dev, 1563 struct device_attribute *attr, char *buf) 1564 { 1565 struct idxd_device *idxd = confdev_to_idxd(dev); 1566 1567 return sysfs_emit(buf, "%u\n", idxd->max_rdbufs); 1568 } 1569 1570 static ssize_t max_tokens_show(struct device *dev, 1571 struct device_attribute *attr, char *buf) 1572 { 1573 dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n"); 1574 return max_read_buffers_show(dev, attr, buf); 1575 } 1576 1577 static DEVICE_ATTR_RO(max_tokens); /* deprecated */ 1578 static DEVICE_ATTR_RO(max_read_buffers); 1579 1580 static ssize_t read_buffer_limit_show(struct device *dev, 1581 struct device_attribute *attr, char *buf) 1582 { 1583 struct idxd_device *idxd = confdev_to_idxd(dev); 1584 1585 return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit); 1586 } 1587 1588 static ssize_t token_limit_show(struct device *dev, 1589 struct device_attribute *attr, char *buf) 1590 { 1591 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n"); 1592 return read_buffer_limit_show(dev, attr, buf); 1593 } 1594 1595 static ssize_t read_buffer_limit_store(struct device *dev, 1596 struct device_attribute *attr, 1597 const char *buf, size_t count) 1598 { 1599 struct idxd_device *idxd = confdev_to_idxd(dev); 1600 unsigned long val; 1601 int rc; 1602 1603 rc = kstrtoul(buf, 10, &val); 1604 if (rc < 0) 1605 return -EINVAL; 1606 1607 if (idxd->state == IDXD_DEV_ENABLED) 1608 return -EPERM; 1609 1610 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1611 return -EPERM; 1612 1613 if (!idxd->hw.group_cap.rdbuf_limit) 1614 return -EPERM; 1615 1616 if (val > idxd->hw.group_cap.total_rdbufs) 1617 return -EINVAL; 1618 1619 idxd->rdbuf_limit = val; 1620 return count; 1621 } 1622 1623 static ssize_t token_limit_store(struct device *dev, 1624 struct device_attribute *attr, 1625 const char *buf, size_t count) 1626 { 1627 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n"); 1628 return read_buffer_limit_store(dev, attr, buf, count); 1629 } 1630 1631 static DEVICE_ATTR_RW(token_limit); /* deprecated */ 1632 static DEVICE_ATTR_RW(read_buffer_limit); 1633 1634 static ssize_t cdev_major_show(struct device *dev, 1635 struct device_attribute *attr, char *buf) 1636 { 1637 struct idxd_device *idxd = confdev_to_idxd(dev); 1638 1639 return sysfs_emit(buf, "%u\n", idxd->major); 1640 } 1641 static DEVICE_ATTR_RO(cdev_major); 1642 1643 static ssize_t cmd_status_show(struct device *dev, 1644 struct device_attribute *attr, char *buf) 1645 { 1646 struct idxd_device *idxd = confdev_to_idxd(dev); 1647 1648 return sysfs_emit(buf, "%#x\n", idxd->cmd_status); 1649 } 1650 1651 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr, 1652 const char *buf, size_t count) 1653 { 1654 struct idxd_device *idxd = confdev_to_idxd(dev); 1655 1656 idxd->cmd_status = 0; 1657 return count; 1658 } 1659 static DEVICE_ATTR_RW(cmd_status); 1660 1661 static ssize_t iaa_cap_show(struct device *dev, 1662 struct device_attribute *attr, char *buf) 1663 { 1664 struct idxd_device *idxd = confdev_to_idxd(dev); 1665 1666 if (idxd->hw.version < DEVICE_VERSION_2) 1667 return -EOPNOTSUPP; 1668 1669 return sysfs_emit(buf, "%#llx\n", idxd->hw.iaa_cap.bits); 1670 } 1671 static DEVICE_ATTR_RO(iaa_cap); 1672 1673 static ssize_t event_log_size_show(struct device *dev, 1674 struct device_attribute *attr, char *buf) 1675 { 1676 struct idxd_device *idxd = confdev_to_idxd(dev); 1677 1678 if (!idxd->evl) 1679 return -EOPNOTSUPP; 1680 1681 return sysfs_emit(buf, "%u\n", idxd->evl->size); 1682 } 1683 1684 static ssize_t event_log_size_store(struct device *dev, 1685 struct device_attribute *attr, 1686 const char *buf, size_t count) 1687 { 1688 struct idxd_device *idxd = confdev_to_idxd(dev); 1689 unsigned long val; 1690 int rc; 1691 1692 if (!idxd->evl) 1693 return -EOPNOTSUPP; 1694 1695 rc = kstrtoul(buf, 10, &val); 1696 if (rc < 0) 1697 return -EINVAL; 1698 1699 if (idxd->state == IDXD_DEV_ENABLED) 1700 return -EPERM; 1701 1702 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1703 return -EPERM; 1704 1705 if (val < IDXD_EVL_SIZE_MIN || val > IDXD_EVL_SIZE_MAX || 1706 (val * evl_ent_size(idxd) > ULONG_MAX - idxd->evl->dma)) 1707 return -EINVAL; 1708 1709 idxd->evl->size = val; 1710 return count; 1711 } 1712 static DEVICE_ATTR_RW(event_log_size); 1713 1714 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr, 1715 struct idxd_device *idxd) 1716 { 1717 /* Intel IAA does not support batch processing, make it invisible */ 1718 return attr == &dev_attr_max_batch_size.attr && 1719 idxd->data->type == IDXD_TYPE_IAX; 1720 } 1721 1722 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr, 1723 struct idxd_device *idxd) 1724 { 1725 /* 1726 * Intel IAA does not support Read Buffer allocation control, 1727 * make these attributes invisible. 1728 */ 1729 return (attr == &dev_attr_max_tokens.attr || 1730 attr == &dev_attr_max_read_buffers.attr || 1731 attr == &dev_attr_token_limit.attr || 1732 attr == &dev_attr_read_buffer_limit.attr) && 1733 idxd->data->type == IDXD_TYPE_IAX; 1734 } 1735 1736 static bool idxd_device_attr_iaa_cap_invisible(struct attribute *attr, 1737 struct idxd_device *idxd) 1738 { 1739 return attr == &dev_attr_iaa_cap.attr && 1740 (idxd->data->type != IDXD_TYPE_IAX || 1741 idxd->hw.version < DEVICE_VERSION_2); 1742 } 1743 1744 static bool idxd_device_attr_event_log_size_invisible(struct attribute *attr, 1745 struct idxd_device *idxd) 1746 { 1747 return (attr == &dev_attr_event_log_size.attr && 1748 !idxd->hw.gen_cap.evl_support); 1749 } 1750 1751 static umode_t idxd_device_attr_visible(struct kobject *kobj, 1752 struct attribute *attr, int n) 1753 { 1754 struct device *dev = container_of(kobj, struct device, kobj); 1755 struct idxd_device *idxd = confdev_to_idxd(dev); 1756 1757 if (idxd_device_attr_max_batch_size_invisible(attr, idxd)) 1758 return 0; 1759 1760 if (idxd_device_attr_read_buffers_invisible(attr, idxd)) 1761 return 0; 1762 1763 if (idxd_device_attr_iaa_cap_invisible(attr, idxd)) 1764 return 0; 1765 1766 if (idxd_device_attr_event_log_size_invisible(attr, idxd)) 1767 return 0; 1768 1769 return attr->mode; 1770 } 1771 1772 static struct attribute *idxd_device_attributes[] = { 1773 &dev_attr_version.attr, 1774 &dev_attr_max_groups.attr, 1775 &dev_attr_max_work_queues.attr, 1776 &dev_attr_max_work_queues_size.attr, 1777 &dev_attr_max_engines.attr, 1778 &dev_attr_numa_node.attr, 1779 &dev_attr_max_batch_size.attr, 1780 &dev_attr_max_transfer_size.attr, 1781 &dev_attr_op_cap.attr, 1782 &dev_attr_gen_cap.attr, 1783 &dev_attr_configurable.attr, 1784 &dev_attr_clients.attr, 1785 &dev_attr_pasid_enabled.attr, 1786 &dev_attr_state.attr, 1787 &dev_attr_errors.attr, 1788 &dev_attr_max_tokens.attr, 1789 &dev_attr_max_read_buffers.attr, 1790 &dev_attr_token_limit.attr, 1791 &dev_attr_read_buffer_limit.attr, 1792 &dev_attr_cdev_major.attr, 1793 &dev_attr_cmd_status.attr, 1794 &dev_attr_iaa_cap.attr, 1795 &dev_attr_event_log_size.attr, 1796 NULL, 1797 }; 1798 1799 static const struct attribute_group idxd_device_attribute_group = { 1800 .attrs = idxd_device_attributes, 1801 .is_visible = idxd_device_attr_visible, 1802 }; 1803 1804 static const struct attribute_group *idxd_attribute_groups[] = { 1805 &idxd_device_attribute_group, 1806 NULL, 1807 }; 1808 1809 static void idxd_conf_device_release(struct device *dev) 1810 { 1811 struct idxd_device *idxd = confdev_to_idxd(dev); 1812 1813 kfree(idxd->groups); 1814 bitmap_free(idxd->wq_enable_map); 1815 kfree(idxd->wqs); 1816 kfree(idxd->engines); 1817 kfree(idxd->evl); 1818 kmem_cache_destroy(idxd->evl_cache); 1819 ida_free(&idxd_ida, idxd->id); 1820 bitmap_free(idxd->opcap_bmap); 1821 kfree(idxd); 1822 } 1823 1824 const struct device_type dsa_device_type = { 1825 .name = "dsa", 1826 .release = idxd_conf_device_release, 1827 .groups = idxd_attribute_groups, 1828 }; 1829 1830 const struct device_type iax_device_type = { 1831 .name = "iax", 1832 .release = idxd_conf_device_release, 1833 .groups = idxd_attribute_groups, 1834 }; 1835 1836 static int idxd_register_engine_devices(struct idxd_device *idxd) 1837 { 1838 struct idxd_engine *engine; 1839 int i, j, rc; 1840 1841 for (i = 0; i < idxd->max_engines; i++) { 1842 engine = idxd->engines[i]; 1843 rc = device_add(engine_confdev(engine)); 1844 if (rc < 0) 1845 goto cleanup; 1846 } 1847 1848 return 0; 1849 1850 cleanup: 1851 j = i - 1; 1852 for (; i < idxd->max_engines; i++) { 1853 engine = idxd->engines[i]; 1854 put_device(engine_confdev(engine)); 1855 } 1856 1857 while (j--) { 1858 engine = idxd->engines[j]; 1859 device_unregister(engine_confdev(engine)); 1860 } 1861 return rc; 1862 } 1863 1864 static int idxd_register_group_devices(struct idxd_device *idxd) 1865 { 1866 struct idxd_group *group; 1867 int i, j, rc; 1868 1869 for (i = 0; i < idxd->max_groups; i++) { 1870 group = idxd->groups[i]; 1871 rc = device_add(group_confdev(group)); 1872 if (rc < 0) 1873 goto cleanup; 1874 } 1875 1876 return 0; 1877 1878 cleanup: 1879 j = i - 1; 1880 for (; i < idxd->max_groups; i++) { 1881 group = idxd->groups[i]; 1882 put_device(group_confdev(group)); 1883 } 1884 1885 while (j--) { 1886 group = idxd->groups[j]; 1887 device_unregister(group_confdev(group)); 1888 } 1889 return rc; 1890 } 1891 1892 static int idxd_register_wq_devices(struct idxd_device *idxd) 1893 { 1894 struct idxd_wq *wq; 1895 int i, rc, j; 1896 1897 for (i = 0; i < idxd->max_wqs; i++) { 1898 wq = idxd->wqs[i]; 1899 rc = device_add(wq_confdev(wq)); 1900 if (rc < 0) 1901 goto cleanup; 1902 } 1903 1904 return 0; 1905 1906 cleanup: 1907 j = i - 1; 1908 for (; i < idxd->max_wqs; i++) { 1909 wq = idxd->wqs[i]; 1910 put_device(wq_confdev(wq)); 1911 } 1912 1913 while (j--) { 1914 wq = idxd->wqs[j]; 1915 device_unregister(wq_confdev(wq)); 1916 } 1917 return rc; 1918 } 1919 1920 int idxd_register_devices(struct idxd_device *idxd) 1921 { 1922 struct device *dev = &idxd->pdev->dev; 1923 int rc, i; 1924 1925 rc = device_add(idxd_confdev(idxd)); 1926 if (rc < 0) 1927 return rc; 1928 1929 rc = idxd_register_wq_devices(idxd); 1930 if (rc < 0) { 1931 dev_dbg(dev, "WQ devices registering failed: %d\n", rc); 1932 goto err_wq; 1933 } 1934 1935 rc = idxd_register_engine_devices(idxd); 1936 if (rc < 0) { 1937 dev_dbg(dev, "Engine devices registering failed: %d\n", rc); 1938 goto err_engine; 1939 } 1940 1941 rc = idxd_register_group_devices(idxd); 1942 if (rc < 0) { 1943 dev_dbg(dev, "Group device registering failed: %d\n", rc); 1944 goto err_group; 1945 } 1946 1947 return 0; 1948 1949 err_group: 1950 for (i = 0; i < idxd->max_engines; i++) 1951 device_unregister(engine_confdev(idxd->engines[i])); 1952 err_engine: 1953 for (i = 0; i < idxd->max_wqs; i++) 1954 device_unregister(wq_confdev(idxd->wqs[i])); 1955 err_wq: 1956 device_del(idxd_confdev(idxd)); 1957 return rc; 1958 } 1959 1960 void idxd_unregister_devices(struct idxd_device *idxd) 1961 { 1962 int i; 1963 1964 for (i = 0; i < idxd->max_wqs; i++) { 1965 struct idxd_wq *wq = idxd->wqs[i]; 1966 1967 device_unregister(wq_confdev(wq)); 1968 } 1969 1970 for (i = 0; i < idxd->max_engines; i++) { 1971 struct idxd_engine *engine = idxd->engines[i]; 1972 1973 device_unregister(engine_confdev(engine)); 1974 } 1975 1976 for (i = 0; i < idxd->max_groups; i++) { 1977 struct idxd_group *group = idxd->groups[i]; 1978 1979 device_unregister(group_confdev(group)); 1980 } 1981 } 1982 1983 int idxd_register_bus_type(void) 1984 { 1985 return bus_register(&dsa_bus_type); 1986 } 1987 1988 void idxd_unregister_bus_type(void) 1989 { 1990 bus_unregister(&dsa_bus_type); 1991 } 1992