1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2019 Intel Corporation. All rights rsvd. */ 3 #include <linux/init.h> 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 #include <linux/pci.h> 7 #include <linux/device.h> 8 #include <linux/io-64-nonatomic-lo-hi.h> 9 #include <uapi/linux/idxd.h> 10 #include "registers.h" 11 #include "idxd.h" 12 13 static char *idxd_wq_type_names[] = { 14 [IDXD_WQT_NONE] = "none", 15 [IDXD_WQT_KERNEL] = "kernel", 16 [IDXD_WQT_USER] = "user", 17 }; 18 19 /* IDXD engine attributes */ 20 static ssize_t engine_group_id_show(struct device *dev, 21 struct device_attribute *attr, char *buf) 22 { 23 struct idxd_engine *engine = confdev_to_engine(dev); 24 25 if (engine->group) 26 return sysfs_emit(buf, "%d\n", engine->group->id); 27 else 28 return sysfs_emit(buf, "%d\n", -1); 29 } 30 31 static ssize_t engine_group_id_store(struct device *dev, 32 struct device_attribute *attr, 33 const char *buf, size_t count) 34 { 35 struct idxd_engine *engine = confdev_to_engine(dev); 36 struct idxd_device *idxd = engine->idxd; 37 long id; 38 int rc; 39 struct idxd_group *prevg; 40 41 rc = kstrtol(buf, 10, &id); 42 if (rc < 0) 43 return -EINVAL; 44 45 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 46 return -EPERM; 47 48 if (id > idxd->max_groups - 1 || id < -1) 49 return -EINVAL; 50 51 if (id == -1) { 52 if (engine->group) { 53 engine->group->num_engines--; 54 engine->group = NULL; 55 } 56 return count; 57 } 58 59 prevg = engine->group; 60 61 if (prevg) 62 prevg->num_engines--; 63 engine->group = idxd->groups[id]; 64 engine->group->num_engines++; 65 66 return count; 67 } 68 69 static struct device_attribute dev_attr_engine_group = 70 __ATTR(group_id, 0644, engine_group_id_show, 71 engine_group_id_store); 72 73 static struct attribute *idxd_engine_attributes[] = { 74 &dev_attr_engine_group.attr, 75 NULL, 76 }; 77 78 static const struct attribute_group idxd_engine_attribute_group = { 79 .attrs = idxd_engine_attributes, 80 }; 81 82 static const struct attribute_group *idxd_engine_attribute_groups[] = { 83 &idxd_engine_attribute_group, 84 NULL, 85 }; 86 87 static void idxd_conf_engine_release(struct device *dev) 88 { 89 struct idxd_engine *engine = confdev_to_engine(dev); 90 91 kfree(engine); 92 } 93 94 struct device_type idxd_engine_device_type = { 95 .name = "engine", 96 .release = idxd_conf_engine_release, 97 .groups = idxd_engine_attribute_groups, 98 }; 99 100 /* Group attributes */ 101 102 static void idxd_set_free_rdbufs(struct idxd_device *idxd) 103 { 104 int i, rdbufs; 105 106 for (i = 0, rdbufs = 0; i < idxd->max_groups; i++) { 107 struct idxd_group *g = idxd->groups[i]; 108 109 rdbufs += g->rdbufs_reserved; 110 } 111 112 idxd->nr_rdbufs = idxd->max_rdbufs - rdbufs; 113 } 114 115 static ssize_t group_read_buffers_reserved_show(struct device *dev, 116 struct device_attribute *attr, 117 char *buf) 118 { 119 struct idxd_group *group = confdev_to_group(dev); 120 121 return sysfs_emit(buf, "%u\n", group->rdbufs_reserved); 122 } 123 124 static ssize_t group_tokens_reserved_show(struct device *dev, 125 struct device_attribute *attr, 126 char *buf) 127 { 128 dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n"); 129 return group_read_buffers_reserved_show(dev, attr, buf); 130 } 131 132 static ssize_t group_read_buffers_reserved_store(struct device *dev, 133 struct device_attribute *attr, 134 const char *buf, size_t count) 135 { 136 struct idxd_group *group = confdev_to_group(dev); 137 struct idxd_device *idxd = group->idxd; 138 unsigned long val; 139 int rc; 140 141 rc = kstrtoul(buf, 10, &val); 142 if (rc < 0) 143 return -EINVAL; 144 145 if (idxd->data->type == IDXD_TYPE_IAX) 146 return -EOPNOTSUPP; 147 148 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 149 return -EPERM; 150 151 if (idxd->state == IDXD_DEV_ENABLED) 152 return -EPERM; 153 154 if (val > idxd->max_rdbufs) 155 return -EINVAL; 156 157 if (val > idxd->nr_rdbufs + group->rdbufs_reserved) 158 return -EINVAL; 159 160 group->rdbufs_reserved = val; 161 idxd_set_free_rdbufs(idxd); 162 return count; 163 } 164 165 static ssize_t group_tokens_reserved_store(struct device *dev, 166 struct device_attribute *attr, 167 const char *buf, size_t count) 168 { 169 dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n"); 170 return group_read_buffers_reserved_store(dev, attr, buf, count); 171 } 172 173 static struct device_attribute dev_attr_group_tokens_reserved = 174 __ATTR(tokens_reserved, 0644, group_tokens_reserved_show, 175 group_tokens_reserved_store); 176 177 static struct device_attribute dev_attr_group_read_buffers_reserved = 178 __ATTR(read_buffers_reserved, 0644, group_read_buffers_reserved_show, 179 group_read_buffers_reserved_store); 180 181 static ssize_t group_read_buffers_allowed_show(struct device *dev, 182 struct device_attribute *attr, 183 char *buf) 184 { 185 struct idxd_group *group = confdev_to_group(dev); 186 187 return sysfs_emit(buf, "%u\n", group->rdbufs_allowed); 188 } 189 190 static ssize_t group_tokens_allowed_show(struct device *dev, 191 struct device_attribute *attr, 192 char *buf) 193 { 194 dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n"); 195 return group_read_buffers_allowed_show(dev, attr, buf); 196 } 197 198 static ssize_t group_read_buffers_allowed_store(struct device *dev, 199 struct device_attribute *attr, 200 const char *buf, size_t count) 201 { 202 struct idxd_group *group = confdev_to_group(dev); 203 struct idxd_device *idxd = group->idxd; 204 unsigned long val; 205 int rc; 206 207 rc = kstrtoul(buf, 10, &val); 208 if (rc < 0) 209 return -EINVAL; 210 211 if (idxd->data->type == IDXD_TYPE_IAX) 212 return -EOPNOTSUPP; 213 214 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 215 return -EPERM; 216 217 if (idxd->state == IDXD_DEV_ENABLED) 218 return -EPERM; 219 220 if (val < 4 * group->num_engines || 221 val > group->rdbufs_reserved + idxd->nr_rdbufs) 222 return -EINVAL; 223 224 group->rdbufs_allowed = val; 225 return count; 226 } 227 228 static ssize_t group_tokens_allowed_store(struct device *dev, 229 struct device_attribute *attr, 230 const char *buf, size_t count) 231 { 232 dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n"); 233 return group_read_buffers_allowed_store(dev, attr, buf, count); 234 } 235 236 static struct device_attribute dev_attr_group_tokens_allowed = 237 __ATTR(tokens_allowed, 0644, group_tokens_allowed_show, 238 group_tokens_allowed_store); 239 240 static struct device_attribute dev_attr_group_read_buffers_allowed = 241 __ATTR(read_buffers_allowed, 0644, group_read_buffers_allowed_show, 242 group_read_buffers_allowed_store); 243 244 static ssize_t group_use_read_buffer_limit_show(struct device *dev, 245 struct device_attribute *attr, 246 char *buf) 247 { 248 struct idxd_group *group = confdev_to_group(dev); 249 250 return sysfs_emit(buf, "%u\n", group->use_rdbuf_limit); 251 } 252 253 static ssize_t group_use_token_limit_show(struct device *dev, 254 struct device_attribute *attr, 255 char *buf) 256 { 257 dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n"); 258 return group_use_read_buffer_limit_show(dev, attr, buf); 259 } 260 261 static ssize_t group_use_read_buffer_limit_store(struct device *dev, 262 struct device_attribute *attr, 263 const char *buf, size_t count) 264 { 265 struct idxd_group *group = confdev_to_group(dev); 266 struct idxd_device *idxd = group->idxd; 267 unsigned long val; 268 int rc; 269 270 rc = kstrtoul(buf, 10, &val); 271 if (rc < 0) 272 return -EINVAL; 273 274 if (idxd->data->type == IDXD_TYPE_IAX) 275 return -EOPNOTSUPP; 276 277 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 278 return -EPERM; 279 280 if (idxd->state == IDXD_DEV_ENABLED) 281 return -EPERM; 282 283 if (idxd->rdbuf_limit == 0) 284 return -EPERM; 285 286 group->use_rdbuf_limit = !!val; 287 return count; 288 } 289 290 static ssize_t group_use_token_limit_store(struct device *dev, 291 struct device_attribute *attr, 292 const char *buf, size_t count) 293 { 294 dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n"); 295 return group_use_read_buffer_limit_store(dev, attr, buf, count); 296 } 297 298 static struct device_attribute dev_attr_group_use_token_limit = 299 __ATTR(use_token_limit, 0644, group_use_token_limit_show, 300 group_use_token_limit_store); 301 302 static struct device_attribute dev_attr_group_use_read_buffer_limit = 303 __ATTR(use_read_buffer_limit, 0644, group_use_read_buffer_limit_show, 304 group_use_read_buffer_limit_store); 305 306 static ssize_t group_engines_show(struct device *dev, 307 struct device_attribute *attr, char *buf) 308 { 309 struct idxd_group *group = confdev_to_group(dev); 310 int i, rc = 0; 311 struct idxd_device *idxd = group->idxd; 312 313 for (i = 0; i < idxd->max_engines; i++) { 314 struct idxd_engine *engine = idxd->engines[i]; 315 316 if (!engine->group) 317 continue; 318 319 if (engine->group->id == group->id) 320 rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id); 321 } 322 323 if (!rc) 324 return 0; 325 rc--; 326 rc += sysfs_emit_at(buf, rc, "\n"); 327 328 return rc; 329 } 330 331 static struct device_attribute dev_attr_group_engines = 332 __ATTR(engines, 0444, group_engines_show, NULL); 333 334 static ssize_t group_work_queues_show(struct device *dev, 335 struct device_attribute *attr, char *buf) 336 { 337 struct idxd_group *group = confdev_to_group(dev); 338 int i, rc = 0; 339 struct idxd_device *idxd = group->idxd; 340 341 for (i = 0; i < idxd->max_wqs; i++) { 342 struct idxd_wq *wq = idxd->wqs[i]; 343 344 if (!wq->group) 345 continue; 346 347 if (wq->group->id == group->id) 348 rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id); 349 } 350 351 if (!rc) 352 return 0; 353 rc--; 354 rc += sysfs_emit_at(buf, rc, "\n"); 355 356 return rc; 357 } 358 359 static struct device_attribute dev_attr_group_work_queues = 360 __ATTR(work_queues, 0444, group_work_queues_show, NULL); 361 362 static ssize_t group_traffic_class_a_show(struct device *dev, 363 struct device_attribute *attr, 364 char *buf) 365 { 366 struct idxd_group *group = confdev_to_group(dev); 367 368 return sysfs_emit(buf, "%d\n", group->tc_a); 369 } 370 371 static ssize_t group_traffic_class_a_store(struct device *dev, 372 struct device_attribute *attr, 373 const char *buf, size_t count) 374 { 375 struct idxd_group *group = confdev_to_group(dev); 376 struct idxd_device *idxd = group->idxd; 377 long val; 378 int rc; 379 380 rc = kstrtol(buf, 10, &val); 381 if (rc < 0) 382 return -EINVAL; 383 384 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 385 return -EPERM; 386 387 if (idxd->state == IDXD_DEV_ENABLED) 388 return -EPERM; 389 390 if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) 391 return -EPERM; 392 393 if (val < 0 || val > 7) 394 return -EINVAL; 395 396 group->tc_a = val; 397 return count; 398 } 399 400 static struct device_attribute dev_attr_group_traffic_class_a = 401 __ATTR(traffic_class_a, 0644, group_traffic_class_a_show, 402 group_traffic_class_a_store); 403 404 static ssize_t group_traffic_class_b_show(struct device *dev, 405 struct device_attribute *attr, 406 char *buf) 407 { 408 struct idxd_group *group = confdev_to_group(dev); 409 410 return sysfs_emit(buf, "%d\n", group->tc_b); 411 } 412 413 static ssize_t group_traffic_class_b_store(struct device *dev, 414 struct device_attribute *attr, 415 const char *buf, size_t count) 416 { 417 struct idxd_group *group = confdev_to_group(dev); 418 struct idxd_device *idxd = group->idxd; 419 long val; 420 int rc; 421 422 rc = kstrtol(buf, 10, &val); 423 if (rc < 0) 424 return -EINVAL; 425 426 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 427 return -EPERM; 428 429 if (idxd->state == IDXD_DEV_ENABLED) 430 return -EPERM; 431 432 if (idxd->hw.version < DEVICE_VERSION_2 && !tc_override) 433 return -EPERM; 434 435 if (val < 0 || val > 7) 436 return -EINVAL; 437 438 group->tc_b = val; 439 return count; 440 } 441 442 static struct device_attribute dev_attr_group_traffic_class_b = 443 __ATTR(traffic_class_b, 0644, group_traffic_class_b_show, 444 group_traffic_class_b_store); 445 446 static ssize_t group_desc_progress_limit_show(struct device *dev, 447 struct device_attribute *attr, 448 char *buf) 449 { 450 struct idxd_group *group = confdev_to_group(dev); 451 452 return sysfs_emit(buf, "%d\n", group->desc_progress_limit); 453 } 454 455 static ssize_t group_desc_progress_limit_store(struct device *dev, 456 struct device_attribute *attr, 457 const char *buf, size_t count) 458 { 459 struct idxd_group *group = confdev_to_group(dev); 460 int val, rc; 461 462 rc = kstrtoint(buf, 10, &val); 463 if (rc < 0) 464 return -EINVAL; 465 466 if (val & ~GENMASK(1, 0)) 467 return -EINVAL; 468 469 group->desc_progress_limit = val; 470 return count; 471 } 472 473 static struct device_attribute dev_attr_group_desc_progress_limit = 474 __ATTR(desc_progress_limit, 0644, group_desc_progress_limit_show, 475 group_desc_progress_limit_store); 476 477 static ssize_t group_batch_progress_limit_show(struct device *dev, 478 struct device_attribute *attr, 479 char *buf) 480 { 481 struct idxd_group *group = confdev_to_group(dev); 482 483 return sysfs_emit(buf, "%d\n", group->batch_progress_limit); 484 } 485 486 static ssize_t group_batch_progress_limit_store(struct device *dev, 487 struct device_attribute *attr, 488 const char *buf, size_t count) 489 { 490 struct idxd_group *group = confdev_to_group(dev); 491 int val, rc; 492 493 rc = kstrtoint(buf, 10, &val); 494 if (rc < 0) 495 return -EINVAL; 496 497 if (val & ~GENMASK(1, 0)) 498 return -EINVAL; 499 500 group->batch_progress_limit = val; 501 return count; 502 } 503 504 static struct device_attribute dev_attr_group_batch_progress_limit = 505 __ATTR(batch_progress_limit, 0644, group_batch_progress_limit_show, 506 group_batch_progress_limit_store); 507 static struct attribute *idxd_group_attributes[] = { 508 &dev_attr_group_work_queues.attr, 509 &dev_attr_group_engines.attr, 510 &dev_attr_group_use_token_limit.attr, 511 &dev_attr_group_use_read_buffer_limit.attr, 512 &dev_attr_group_tokens_allowed.attr, 513 &dev_attr_group_read_buffers_allowed.attr, 514 &dev_attr_group_tokens_reserved.attr, 515 &dev_attr_group_read_buffers_reserved.attr, 516 &dev_attr_group_traffic_class_a.attr, 517 &dev_attr_group_traffic_class_b.attr, 518 &dev_attr_group_desc_progress_limit.attr, 519 &dev_attr_group_batch_progress_limit.attr, 520 NULL, 521 }; 522 523 static bool idxd_group_attr_progress_limit_invisible(struct attribute *attr, 524 struct idxd_device *idxd) 525 { 526 return (attr == &dev_attr_group_desc_progress_limit.attr || 527 attr == &dev_attr_group_batch_progress_limit.attr) && 528 !idxd->hw.group_cap.progress_limit; 529 } 530 531 static bool idxd_group_attr_read_buffers_invisible(struct attribute *attr, 532 struct idxd_device *idxd) 533 { 534 /* 535 * Intel IAA does not support Read Buffer allocation control, 536 * make these attributes invisible. 537 */ 538 return (attr == &dev_attr_group_use_token_limit.attr || 539 attr == &dev_attr_group_use_read_buffer_limit.attr || 540 attr == &dev_attr_group_tokens_allowed.attr || 541 attr == &dev_attr_group_read_buffers_allowed.attr || 542 attr == &dev_attr_group_tokens_reserved.attr || 543 attr == &dev_attr_group_read_buffers_reserved.attr) && 544 idxd->data->type == IDXD_TYPE_IAX; 545 } 546 547 static umode_t idxd_group_attr_visible(struct kobject *kobj, 548 struct attribute *attr, int n) 549 { 550 struct device *dev = container_of(kobj, struct device, kobj); 551 struct idxd_group *group = confdev_to_group(dev); 552 struct idxd_device *idxd = group->idxd; 553 554 if (idxd_group_attr_progress_limit_invisible(attr, idxd)) 555 return 0; 556 557 if (idxd_group_attr_read_buffers_invisible(attr, idxd)) 558 return 0; 559 560 return attr->mode; 561 } 562 563 static const struct attribute_group idxd_group_attribute_group = { 564 .attrs = idxd_group_attributes, 565 .is_visible = idxd_group_attr_visible, 566 }; 567 568 static const struct attribute_group *idxd_group_attribute_groups[] = { 569 &idxd_group_attribute_group, 570 NULL, 571 }; 572 573 static void idxd_conf_group_release(struct device *dev) 574 { 575 struct idxd_group *group = confdev_to_group(dev); 576 577 kfree(group); 578 } 579 580 struct device_type idxd_group_device_type = { 581 .name = "group", 582 .release = idxd_conf_group_release, 583 .groups = idxd_group_attribute_groups, 584 }; 585 586 /* IDXD work queue attribs */ 587 static ssize_t wq_clients_show(struct device *dev, 588 struct device_attribute *attr, char *buf) 589 { 590 struct idxd_wq *wq = confdev_to_wq(dev); 591 592 return sysfs_emit(buf, "%d\n", wq->client_count); 593 } 594 595 static struct device_attribute dev_attr_wq_clients = 596 __ATTR(clients, 0444, wq_clients_show, NULL); 597 598 static ssize_t wq_state_show(struct device *dev, 599 struct device_attribute *attr, char *buf) 600 { 601 struct idxd_wq *wq = confdev_to_wq(dev); 602 603 switch (wq->state) { 604 case IDXD_WQ_DISABLED: 605 return sysfs_emit(buf, "disabled\n"); 606 case IDXD_WQ_ENABLED: 607 return sysfs_emit(buf, "enabled\n"); 608 } 609 610 return sysfs_emit(buf, "unknown\n"); 611 } 612 613 static struct device_attribute dev_attr_wq_state = 614 __ATTR(state, 0444, wq_state_show, NULL); 615 616 static ssize_t wq_group_id_show(struct device *dev, 617 struct device_attribute *attr, char *buf) 618 { 619 struct idxd_wq *wq = confdev_to_wq(dev); 620 621 if (wq->group) 622 return sysfs_emit(buf, "%u\n", wq->group->id); 623 else 624 return sysfs_emit(buf, "-1\n"); 625 } 626 627 static ssize_t wq_group_id_store(struct device *dev, 628 struct device_attribute *attr, 629 const char *buf, size_t count) 630 { 631 struct idxd_wq *wq = confdev_to_wq(dev); 632 struct idxd_device *idxd = wq->idxd; 633 long id; 634 int rc; 635 struct idxd_group *prevg, *group; 636 637 rc = kstrtol(buf, 10, &id); 638 if (rc < 0) 639 return -EINVAL; 640 641 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 642 return -EPERM; 643 644 if (wq->state != IDXD_WQ_DISABLED) 645 return -EPERM; 646 647 if (id > idxd->max_groups - 1 || id < -1) 648 return -EINVAL; 649 650 if (id == -1) { 651 if (wq->group) { 652 wq->group->num_wqs--; 653 wq->group = NULL; 654 } 655 return count; 656 } 657 658 group = idxd->groups[id]; 659 prevg = wq->group; 660 661 if (prevg) 662 prevg->num_wqs--; 663 wq->group = group; 664 group->num_wqs++; 665 return count; 666 } 667 668 static struct device_attribute dev_attr_wq_group_id = 669 __ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store); 670 671 static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr, 672 char *buf) 673 { 674 struct idxd_wq *wq = confdev_to_wq(dev); 675 676 return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared"); 677 } 678 679 static ssize_t wq_mode_store(struct device *dev, 680 struct device_attribute *attr, const char *buf, 681 size_t count) 682 { 683 struct idxd_wq *wq = confdev_to_wq(dev); 684 struct idxd_device *idxd = wq->idxd; 685 686 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 687 return -EPERM; 688 689 if (wq->state != IDXD_WQ_DISABLED) 690 return -EPERM; 691 692 if (sysfs_streq(buf, "dedicated")) { 693 set_bit(WQ_FLAG_DEDICATED, &wq->flags); 694 wq->threshold = 0; 695 } else if (sysfs_streq(buf, "shared")) { 696 clear_bit(WQ_FLAG_DEDICATED, &wq->flags); 697 } else { 698 return -EINVAL; 699 } 700 701 return count; 702 } 703 704 static struct device_attribute dev_attr_wq_mode = 705 __ATTR(mode, 0644, wq_mode_show, wq_mode_store); 706 707 static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr, 708 char *buf) 709 { 710 struct idxd_wq *wq = confdev_to_wq(dev); 711 712 return sysfs_emit(buf, "%u\n", wq->size); 713 } 714 715 static int total_claimed_wq_size(struct idxd_device *idxd) 716 { 717 int i; 718 int wq_size = 0; 719 720 for (i = 0; i < idxd->max_wqs; i++) { 721 struct idxd_wq *wq = idxd->wqs[i]; 722 723 wq_size += wq->size; 724 } 725 726 return wq_size; 727 } 728 729 static ssize_t wq_size_store(struct device *dev, 730 struct device_attribute *attr, const char *buf, 731 size_t count) 732 { 733 struct idxd_wq *wq = confdev_to_wq(dev); 734 unsigned long size; 735 struct idxd_device *idxd = wq->idxd; 736 int rc; 737 738 rc = kstrtoul(buf, 10, &size); 739 if (rc < 0) 740 return -EINVAL; 741 742 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 743 return -EPERM; 744 745 if (idxd->state == IDXD_DEV_ENABLED) 746 return -EPERM; 747 748 if (size + total_claimed_wq_size(idxd) - wq->size > idxd->max_wq_size) 749 return -EINVAL; 750 751 wq->size = size; 752 return count; 753 } 754 755 static struct device_attribute dev_attr_wq_size = 756 __ATTR(size, 0644, wq_size_show, wq_size_store); 757 758 static ssize_t wq_priority_show(struct device *dev, 759 struct device_attribute *attr, char *buf) 760 { 761 struct idxd_wq *wq = confdev_to_wq(dev); 762 763 return sysfs_emit(buf, "%u\n", wq->priority); 764 } 765 766 static ssize_t wq_priority_store(struct device *dev, 767 struct device_attribute *attr, 768 const char *buf, size_t count) 769 { 770 struct idxd_wq *wq = confdev_to_wq(dev); 771 unsigned long prio; 772 struct idxd_device *idxd = wq->idxd; 773 int rc; 774 775 rc = kstrtoul(buf, 10, &prio); 776 if (rc < 0) 777 return -EINVAL; 778 779 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 780 return -EPERM; 781 782 if (wq->state != IDXD_WQ_DISABLED) 783 return -EPERM; 784 785 if (prio > IDXD_MAX_PRIORITY) 786 return -EINVAL; 787 788 wq->priority = prio; 789 return count; 790 } 791 792 static struct device_attribute dev_attr_wq_priority = 793 __ATTR(priority, 0644, wq_priority_show, wq_priority_store); 794 795 static ssize_t wq_block_on_fault_show(struct device *dev, 796 struct device_attribute *attr, char *buf) 797 { 798 struct idxd_wq *wq = confdev_to_wq(dev); 799 800 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags)); 801 } 802 803 static ssize_t wq_block_on_fault_store(struct device *dev, 804 struct device_attribute *attr, 805 const char *buf, size_t count) 806 { 807 struct idxd_wq *wq = confdev_to_wq(dev); 808 struct idxd_device *idxd = wq->idxd; 809 bool bof; 810 int rc; 811 812 if (!idxd->hw.gen_cap.block_on_fault) 813 return -EOPNOTSUPP; 814 815 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 816 return -EPERM; 817 818 if (wq->state != IDXD_WQ_DISABLED) 819 return -ENXIO; 820 821 rc = kstrtobool(buf, &bof); 822 if (rc < 0) 823 return rc; 824 825 if (bof) 826 set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); 827 else 828 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); 829 830 return count; 831 } 832 833 static struct device_attribute dev_attr_wq_block_on_fault = 834 __ATTR(block_on_fault, 0644, wq_block_on_fault_show, 835 wq_block_on_fault_store); 836 837 static ssize_t wq_threshold_show(struct device *dev, 838 struct device_attribute *attr, char *buf) 839 { 840 struct idxd_wq *wq = confdev_to_wq(dev); 841 842 return sysfs_emit(buf, "%u\n", wq->threshold); 843 } 844 845 static ssize_t wq_threshold_store(struct device *dev, 846 struct device_attribute *attr, 847 const char *buf, size_t count) 848 { 849 struct idxd_wq *wq = confdev_to_wq(dev); 850 struct idxd_device *idxd = wq->idxd; 851 unsigned int val; 852 int rc; 853 854 rc = kstrtouint(buf, 0, &val); 855 if (rc < 0) 856 return -EINVAL; 857 858 if (val > wq->size || val <= 0) 859 return -EINVAL; 860 861 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 862 return -EPERM; 863 864 if (wq->state != IDXD_WQ_DISABLED) 865 return -ENXIO; 866 867 if (test_bit(WQ_FLAG_DEDICATED, &wq->flags)) 868 return -EINVAL; 869 870 wq->threshold = val; 871 872 return count; 873 } 874 875 static struct device_attribute dev_attr_wq_threshold = 876 __ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store); 877 878 static ssize_t wq_type_show(struct device *dev, 879 struct device_attribute *attr, char *buf) 880 { 881 struct idxd_wq *wq = confdev_to_wq(dev); 882 883 switch (wq->type) { 884 case IDXD_WQT_KERNEL: 885 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]); 886 case IDXD_WQT_USER: 887 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]); 888 case IDXD_WQT_NONE: 889 default: 890 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]); 891 } 892 893 return -EINVAL; 894 } 895 896 static ssize_t wq_type_store(struct device *dev, 897 struct device_attribute *attr, const char *buf, 898 size_t count) 899 { 900 struct idxd_wq *wq = confdev_to_wq(dev); 901 enum idxd_wq_type old_type; 902 903 if (wq->state != IDXD_WQ_DISABLED) 904 return -EPERM; 905 906 old_type = wq->type; 907 if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE])) 908 wq->type = IDXD_WQT_NONE; 909 else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL])) 910 wq->type = IDXD_WQT_KERNEL; 911 else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER])) 912 wq->type = IDXD_WQT_USER; 913 else 914 return -EINVAL; 915 916 /* If we are changing queue type, clear the name */ 917 if (wq->type != old_type) 918 memset(wq->name, 0, WQ_NAME_SIZE + 1); 919 920 return count; 921 } 922 923 static struct device_attribute dev_attr_wq_type = 924 __ATTR(type, 0644, wq_type_show, wq_type_store); 925 926 static ssize_t wq_name_show(struct device *dev, 927 struct device_attribute *attr, char *buf) 928 { 929 struct idxd_wq *wq = confdev_to_wq(dev); 930 931 return sysfs_emit(buf, "%s\n", wq->name); 932 } 933 934 static ssize_t wq_name_store(struct device *dev, 935 struct device_attribute *attr, const char *buf, 936 size_t count) 937 { 938 struct idxd_wq *wq = confdev_to_wq(dev); 939 char *input, *pos; 940 941 if (wq->state != IDXD_WQ_DISABLED) 942 return -EPERM; 943 944 if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0) 945 return -EINVAL; 946 947 /* 948 * This is temporarily placed here until we have SVM support for 949 * dmaengine. 950 */ 951 if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd)) 952 return -EOPNOTSUPP; 953 954 input = kstrndup(buf, count, GFP_KERNEL); 955 if (!input) 956 return -ENOMEM; 957 958 pos = strim(input); 959 memset(wq->name, 0, WQ_NAME_SIZE + 1); 960 sprintf(wq->name, "%s", pos); 961 kfree(input); 962 return count; 963 } 964 965 static struct device_attribute dev_attr_wq_name = 966 __ATTR(name, 0644, wq_name_show, wq_name_store); 967 968 static ssize_t wq_cdev_minor_show(struct device *dev, 969 struct device_attribute *attr, char *buf) 970 { 971 struct idxd_wq *wq = confdev_to_wq(dev); 972 int minor = -1; 973 974 mutex_lock(&wq->wq_lock); 975 if (wq->idxd_cdev) 976 minor = wq->idxd_cdev->minor; 977 mutex_unlock(&wq->wq_lock); 978 979 if (minor == -1) 980 return -ENXIO; 981 return sysfs_emit(buf, "%d\n", minor); 982 } 983 984 static struct device_attribute dev_attr_wq_cdev_minor = 985 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL); 986 987 static int __get_sysfs_u64(const char *buf, u64 *val) 988 { 989 int rc; 990 991 rc = kstrtou64(buf, 0, val); 992 if (rc < 0) 993 return -EINVAL; 994 995 if (*val == 0) 996 return -EINVAL; 997 998 *val = roundup_pow_of_two(*val); 999 return 0; 1000 } 1001 1002 static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr, 1003 char *buf) 1004 { 1005 struct idxd_wq *wq = confdev_to_wq(dev); 1006 1007 return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes); 1008 } 1009 1010 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr, 1011 const char *buf, size_t count) 1012 { 1013 struct idxd_wq *wq = confdev_to_wq(dev); 1014 struct idxd_device *idxd = wq->idxd; 1015 u64 xfer_size; 1016 int rc; 1017 1018 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1019 return -EPERM; 1020 1021 if (wq->state != IDXD_WQ_DISABLED) 1022 return -EPERM; 1023 1024 rc = __get_sysfs_u64(buf, &xfer_size); 1025 if (rc < 0) 1026 return rc; 1027 1028 if (xfer_size > idxd->max_xfer_bytes) 1029 return -EINVAL; 1030 1031 wq->max_xfer_bytes = xfer_size; 1032 1033 return count; 1034 } 1035 1036 static struct device_attribute dev_attr_wq_max_transfer_size = 1037 __ATTR(max_transfer_size, 0644, 1038 wq_max_transfer_size_show, wq_max_transfer_size_store); 1039 1040 static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf) 1041 { 1042 struct idxd_wq *wq = confdev_to_wq(dev); 1043 1044 return sysfs_emit(buf, "%u\n", wq->max_batch_size); 1045 } 1046 1047 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr, 1048 const char *buf, size_t count) 1049 { 1050 struct idxd_wq *wq = confdev_to_wq(dev); 1051 struct idxd_device *idxd = wq->idxd; 1052 u64 batch_size; 1053 int rc; 1054 1055 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1056 return -EPERM; 1057 1058 if (wq->state != IDXD_WQ_DISABLED) 1059 return -EPERM; 1060 1061 rc = __get_sysfs_u64(buf, &batch_size); 1062 if (rc < 0) 1063 return rc; 1064 1065 if (batch_size > idxd->max_batch_size) 1066 return -EINVAL; 1067 1068 idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size); 1069 1070 return count; 1071 } 1072 1073 static struct device_attribute dev_attr_wq_max_batch_size = 1074 __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store); 1075 1076 static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf) 1077 { 1078 struct idxd_wq *wq = confdev_to_wq(dev); 1079 1080 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags)); 1081 } 1082 1083 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr, 1084 const char *buf, size_t count) 1085 { 1086 struct idxd_wq *wq = confdev_to_wq(dev); 1087 struct idxd_device *idxd = wq->idxd; 1088 bool ats_dis; 1089 int rc; 1090 1091 if (wq->state != IDXD_WQ_DISABLED) 1092 return -EPERM; 1093 1094 if (!idxd->hw.wq_cap.wq_ats_support) 1095 return -EOPNOTSUPP; 1096 1097 rc = kstrtobool(buf, &ats_dis); 1098 if (rc < 0) 1099 return rc; 1100 1101 if (ats_dis) 1102 set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags); 1103 else 1104 clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags); 1105 1106 return count; 1107 } 1108 1109 static struct device_attribute dev_attr_wq_ats_disable = 1110 __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store); 1111 1112 static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf) 1113 { 1114 struct idxd_wq *wq = confdev_to_wq(dev); 1115 struct idxd_device *idxd = wq->idxd; 1116 u32 occup, offset; 1117 1118 if (!idxd->hw.wq_cap.occupancy) 1119 return -EOPNOTSUPP; 1120 1121 offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX); 1122 occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK; 1123 1124 return sysfs_emit(buf, "%u\n", occup); 1125 } 1126 1127 static struct device_attribute dev_attr_wq_occupancy = 1128 __ATTR(occupancy, 0444, wq_occupancy_show, NULL); 1129 1130 static ssize_t wq_enqcmds_retries_show(struct device *dev, 1131 struct device_attribute *attr, char *buf) 1132 { 1133 struct idxd_wq *wq = confdev_to_wq(dev); 1134 1135 if (wq_dedicated(wq)) 1136 return -EOPNOTSUPP; 1137 1138 return sysfs_emit(buf, "%u\n", wq->enqcmds_retries); 1139 } 1140 1141 static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr, 1142 const char *buf, size_t count) 1143 { 1144 struct idxd_wq *wq = confdev_to_wq(dev); 1145 int rc; 1146 unsigned int retries; 1147 1148 if (wq_dedicated(wq)) 1149 return -EOPNOTSUPP; 1150 1151 rc = kstrtouint(buf, 10, &retries); 1152 if (rc < 0) 1153 return rc; 1154 1155 if (retries > IDXD_ENQCMDS_MAX_RETRIES) 1156 retries = IDXD_ENQCMDS_MAX_RETRIES; 1157 1158 wq->enqcmds_retries = retries; 1159 return count; 1160 } 1161 1162 static struct device_attribute dev_attr_wq_enqcmds_retries = 1163 __ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store); 1164 1165 static ssize_t wq_op_config_show(struct device *dev, 1166 struct device_attribute *attr, char *buf) 1167 { 1168 struct idxd_wq *wq = confdev_to_wq(dev); 1169 1170 return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap); 1171 } 1172 1173 static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask) 1174 { 1175 int bit; 1176 1177 /* 1178 * The OPCAP is defined as 256 bits that represents each operation the device 1179 * supports per bit. Iterate through all the bits and check if the input mask 1180 * is set for bits that are not set in the OPCAP for the device. If no OPCAP 1181 * bit is set and input mask has the bit set, then return error. 1182 */ 1183 for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) { 1184 if (!test_bit(bit, idxd->opcap_bmap)) 1185 return -EINVAL; 1186 } 1187 1188 return 0; 1189 } 1190 1191 static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr, 1192 const char *buf, size_t count) 1193 { 1194 struct idxd_wq *wq = confdev_to_wq(dev); 1195 struct idxd_device *idxd = wq->idxd; 1196 unsigned long *opmask; 1197 int rc; 1198 1199 if (wq->state != IDXD_WQ_DISABLED) 1200 return -EPERM; 1201 1202 opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL); 1203 if (!opmask) 1204 return -ENOMEM; 1205 1206 rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS); 1207 if (rc < 0) 1208 goto err; 1209 1210 rc = idxd_verify_supported_opcap(idxd, opmask); 1211 if (rc < 0) 1212 goto err; 1213 1214 bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS); 1215 1216 bitmap_free(opmask); 1217 return count; 1218 1219 err: 1220 bitmap_free(opmask); 1221 return rc; 1222 } 1223 1224 static struct device_attribute dev_attr_wq_op_config = 1225 __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store); 1226 1227 static struct attribute *idxd_wq_attributes[] = { 1228 &dev_attr_wq_clients.attr, 1229 &dev_attr_wq_state.attr, 1230 &dev_attr_wq_group_id.attr, 1231 &dev_attr_wq_mode.attr, 1232 &dev_attr_wq_size.attr, 1233 &dev_attr_wq_priority.attr, 1234 &dev_attr_wq_block_on_fault.attr, 1235 &dev_attr_wq_threshold.attr, 1236 &dev_attr_wq_type.attr, 1237 &dev_attr_wq_name.attr, 1238 &dev_attr_wq_cdev_minor.attr, 1239 &dev_attr_wq_max_transfer_size.attr, 1240 &dev_attr_wq_max_batch_size.attr, 1241 &dev_attr_wq_ats_disable.attr, 1242 &dev_attr_wq_occupancy.attr, 1243 &dev_attr_wq_enqcmds_retries.attr, 1244 &dev_attr_wq_op_config.attr, 1245 NULL, 1246 }; 1247 1248 static bool idxd_wq_attr_op_config_invisible(struct attribute *attr, 1249 struct idxd_device *idxd) 1250 { 1251 return attr == &dev_attr_wq_op_config.attr && 1252 !idxd->hw.wq_cap.op_config; 1253 } 1254 1255 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr, 1256 struct idxd_device *idxd) 1257 { 1258 /* Intel IAA does not support batch processing, make it invisible */ 1259 return attr == &dev_attr_wq_max_batch_size.attr && 1260 idxd->data->type == IDXD_TYPE_IAX; 1261 } 1262 1263 static umode_t idxd_wq_attr_visible(struct kobject *kobj, 1264 struct attribute *attr, int n) 1265 { 1266 struct device *dev = container_of(kobj, struct device, kobj); 1267 struct idxd_wq *wq = confdev_to_wq(dev); 1268 struct idxd_device *idxd = wq->idxd; 1269 1270 if (idxd_wq_attr_op_config_invisible(attr, idxd)) 1271 return 0; 1272 1273 if (idxd_wq_attr_max_batch_size_invisible(attr, idxd)) 1274 return 0; 1275 1276 return attr->mode; 1277 } 1278 1279 static const struct attribute_group idxd_wq_attribute_group = { 1280 .attrs = idxd_wq_attributes, 1281 .is_visible = idxd_wq_attr_visible, 1282 }; 1283 1284 static const struct attribute_group *idxd_wq_attribute_groups[] = { 1285 &idxd_wq_attribute_group, 1286 NULL, 1287 }; 1288 1289 static void idxd_conf_wq_release(struct device *dev) 1290 { 1291 struct idxd_wq *wq = confdev_to_wq(dev); 1292 1293 bitmap_free(wq->opcap_bmap); 1294 kfree(wq->wqcfg); 1295 kfree(wq); 1296 } 1297 1298 struct device_type idxd_wq_device_type = { 1299 .name = "wq", 1300 .release = idxd_conf_wq_release, 1301 .groups = idxd_wq_attribute_groups, 1302 }; 1303 1304 /* IDXD device attribs */ 1305 static ssize_t version_show(struct device *dev, struct device_attribute *attr, 1306 char *buf) 1307 { 1308 struct idxd_device *idxd = confdev_to_idxd(dev); 1309 1310 return sysfs_emit(buf, "%#x\n", idxd->hw.version); 1311 } 1312 static DEVICE_ATTR_RO(version); 1313 1314 static ssize_t max_work_queues_size_show(struct device *dev, 1315 struct device_attribute *attr, 1316 char *buf) 1317 { 1318 struct idxd_device *idxd = confdev_to_idxd(dev); 1319 1320 return sysfs_emit(buf, "%u\n", idxd->max_wq_size); 1321 } 1322 static DEVICE_ATTR_RO(max_work_queues_size); 1323 1324 static ssize_t max_groups_show(struct device *dev, 1325 struct device_attribute *attr, char *buf) 1326 { 1327 struct idxd_device *idxd = confdev_to_idxd(dev); 1328 1329 return sysfs_emit(buf, "%u\n", idxd->max_groups); 1330 } 1331 static DEVICE_ATTR_RO(max_groups); 1332 1333 static ssize_t max_work_queues_show(struct device *dev, 1334 struct device_attribute *attr, char *buf) 1335 { 1336 struct idxd_device *idxd = confdev_to_idxd(dev); 1337 1338 return sysfs_emit(buf, "%u\n", idxd->max_wqs); 1339 } 1340 static DEVICE_ATTR_RO(max_work_queues); 1341 1342 static ssize_t max_engines_show(struct device *dev, 1343 struct device_attribute *attr, char *buf) 1344 { 1345 struct idxd_device *idxd = confdev_to_idxd(dev); 1346 1347 return sysfs_emit(buf, "%u\n", idxd->max_engines); 1348 } 1349 static DEVICE_ATTR_RO(max_engines); 1350 1351 static ssize_t numa_node_show(struct device *dev, 1352 struct device_attribute *attr, char *buf) 1353 { 1354 struct idxd_device *idxd = confdev_to_idxd(dev); 1355 1356 return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); 1357 } 1358 static DEVICE_ATTR_RO(numa_node); 1359 1360 static ssize_t max_batch_size_show(struct device *dev, 1361 struct device_attribute *attr, char *buf) 1362 { 1363 struct idxd_device *idxd = confdev_to_idxd(dev); 1364 1365 return sysfs_emit(buf, "%u\n", idxd->max_batch_size); 1366 } 1367 static DEVICE_ATTR_RO(max_batch_size); 1368 1369 static ssize_t max_transfer_size_show(struct device *dev, 1370 struct device_attribute *attr, 1371 char *buf) 1372 { 1373 struct idxd_device *idxd = confdev_to_idxd(dev); 1374 1375 return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes); 1376 } 1377 static DEVICE_ATTR_RO(max_transfer_size); 1378 1379 static ssize_t op_cap_show(struct device *dev, 1380 struct device_attribute *attr, char *buf) 1381 { 1382 struct idxd_device *idxd = confdev_to_idxd(dev); 1383 1384 return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap); 1385 } 1386 static DEVICE_ATTR_RO(op_cap); 1387 1388 static ssize_t gen_cap_show(struct device *dev, 1389 struct device_attribute *attr, char *buf) 1390 { 1391 struct idxd_device *idxd = confdev_to_idxd(dev); 1392 1393 return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits); 1394 } 1395 static DEVICE_ATTR_RO(gen_cap); 1396 1397 static ssize_t configurable_show(struct device *dev, 1398 struct device_attribute *attr, char *buf) 1399 { 1400 struct idxd_device *idxd = confdev_to_idxd(dev); 1401 1402 return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); 1403 } 1404 static DEVICE_ATTR_RO(configurable); 1405 1406 static ssize_t clients_show(struct device *dev, 1407 struct device_attribute *attr, char *buf) 1408 { 1409 struct idxd_device *idxd = confdev_to_idxd(dev); 1410 int count = 0, i; 1411 1412 spin_lock(&idxd->dev_lock); 1413 for (i = 0; i < idxd->max_wqs; i++) { 1414 struct idxd_wq *wq = idxd->wqs[i]; 1415 1416 count += wq->client_count; 1417 } 1418 spin_unlock(&idxd->dev_lock); 1419 1420 return sysfs_emit(buf, "%d\n", count); 1421 } 1422 static DEVICE_ATTR_RO(clients); 1423 1424 static ssize_t pasid_enabled_show(struct device *dev, 1425 struct device_attribute *attr, char *buf) 1426 { 1427 struct idxd_device *idxd = confdev_to_idxd(dev); 1428 1429 return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd)); 1430 } 1431 static DEVICE_ATTR_RO(pasid_enabled); 1432 1433 static ssize_t state_show(struct device *dev, 1434 struct device_attribute *attr, char *buf) 1435 { 1436 struct idxd_device *idxd = confdev_to_idxd(dev); 1437 1438 switch (idxd->state) { 1439 case IDXD_DEV_DISABLED: 1440 return sysfs_emit(buf, "disabled\n"); 1441 case IDXD_DEV_ENABLED: 1442 return sysfs_emit(buf, "enabled\n"); 1443 case IDXD_DEV_HALTED: 1444 return sysfs_emit(buf, "halted\n"); 1445 } 1446 1447 return sysfs_emit(buf, "unknown\n"); 1448 } 1449 static DEVICE_ATTR_RO(state); 1450 1451 static ssize_t errors_show(struct device *dev, 1452 struct device_attribute *attr, char *buf) 1453 { 1454 struct idxd_device *idxd = confdev_to_idxd(dev); 1455 int i, out = 0; 1456 1457 spin_lock(&idxd->dev_lock); 1458 for (i = 0; i < 4; i++) 1459 out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]); 1460 spin_unlock(&idxd->dev_lock); 1461 out--; 1462 out += sysfs_emit_at(buf, out, "\n"); 1463 return out; 1464 } 1465 static DEVICE_ATTR_RO(errors); 1466 1467 static ssize_t max_read_buffers_show(struct device *dev, 1468 struct device_attribute *attr, char *buf) 1469 { 1470 struct idxd_device *idxd = confdev_to_idxd(dev); 1471 1472 return sysfs_emit(buf, "%u\n", idxd->max_rdbufs); 1473 } 1474 1475 static ssize_t max_tokens_show(struct device *dev, 1476 struct device_attribute *attr, char *buf) 1477 { 1478 dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n"); 1479 return max_read_buffers_show(dev, attr, buf); 1480 } 1481 1482 static DEVICE_ATTR_RO(max_tokens); /* deprecated */ 1483 static DEVICE_ATTR_RO(max_read_buffers); 1484 1485 static ssize_t read_buffer_limit_show(struct device *dev, 1486 struct device_attribute *attr, char *buf) 1487 { 1488 struct idxd_device *idxd = confdev_to_idxd(dev); 1489 1490 return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit); 1491 } 1492 1493 static ssize_t token_limit_show(struct device *dev, 1494 struct device_attribute *attr, char *buf) 1495 { 1496 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n"); 1497 return read_buffer_limit_show(dev, attr, buf); 1498 } 1499 1500 static ssize_t read_buffer_limit_store(struct device *dev, 1501 struct device_attribute *attr, 1502 const char *buf, size_t count) 1503 { 1504 struct idxd_device *idxd = confdev_to_idxd(dev); 1505 unsigned long val; 1506 int rc; 1507 1508 rc = kstrtoul(buf, 10, &val); 1509 if (rc < 0) 1510 return -EINVAL; 1511 1512 if (idxd->state == IDXD_DEV_ENABLED) 1513 return -EPERM; 1514 1515 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) 1516 return -EPERM; 1517 1518 if (!idxd->hw.group_cap.rdbuf_limit) 1519 return -EPERM; 1520 1521 if (val > idxd->hw.group_cap.total_rdbufs) 1522 return -EINVAL; 1523 1524 idxd->rdbuf_limit = val; 1525 return count; 1526 } 1527 1528 static ssize_t token_limit_store(struct device *dev, 1529 struct device_attribute *attr, 1530 const char *buf, size_t count) 1531 { 1532 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n"); 1533 return read_buffer_limit_store(dev, attr, buf, count); 1534 } 1535 1536 static DEVICE_ATTR_RW(token_limit); /* deprecated */ 1537 static DEVICE_ATTR_RW(read_buffer_limit); 1538 1539 static ssize_t cdev_major_show(struct device *dev, 1540 struct device_attribute *attr, char *buf) 1541 { 1542 struct idxd_device *idxd = confdev_to_idxd(dev); 1543 1544 return sysfs_emit(buf, "%u\n", idxd->major); 1545 } 1546 static DEVICE_ATTR_RO(cdev_major); 1547 1548 static ssize_t cmd_status_show(struct device *dev, 1549 struct device_attribute *attr, char *buf) 1550 { 1551 struct idxd_device *idxd = confdev_to_idxd(dev); 1552 1553 return sysfs_emit(buf, "%#x\n", idxd->cmd_status); 1554 } 1555 1556 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr, 1557 const char *buf, size_t count) 1558 { 1559 struct idxd_device *idxd = confdev_to_idxd(dev); 1560 1561 idxd->cmd_status = 0; 1562 return count; 1563 } 1564 static DEVICE_ATTR_RW(cmd_status); 1565 1566 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr, 1567 struct idxd_device *idxd) 1568 { 1569 /* Intel IAA does not support batch processing, make it invisible */ 1570 return attr == &dev_attr_max_batch_size.attr && 1571 idxd->data->type == IDXD_TYPE_IAX; 1572 } 1573 1574 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr, 1575 struct idxd_device *idxd) 1576 { 1577 /* 1578 * Intel IAA does not support Read Buffer allocation control, 1579 * make these attributes invisible. 1580 */ 1581 return (attr == &dev_attr_max_tokens.attr || 1582 attr == &dev_attr_max_read_buffers.attr || 1583 attr == &dev_attr_token_limit.attr || 1584 attr == &dev_attr_read_buffer_limit.attr) && 1585 idxd->data->type == IDXD_TYPE_IAX; 1586 } 1587 1588 static umode_t idxd_device_attr_visible(struct kobject *kobj, 1589 struct attribute *attr, int n) 1590 { 1591 struct device *dev = container_of(kobj, struct device, kobj); 1592 struct idxd_device *idxd = confdev_to_idxd(dev); 1593 1594 if (idxd_device_attr_max_batch_size_invisible(attr, idxd)) 1595 return 0; 1596 1597 if (idxd_device_attr_read_buffers_invisible(attr, idxd)) 1598 return 0; 1599 1600 return attr->mode; 1601 } 1602 1603 static struct attribute *idxd_device_attributes[] = { 1604 &dev_attr_version.attr, 1605 &dev_attr_max_groups.attr, 1606 &dev_attr_max_work_queues.attr, 1607 &dev_attr_max_work_queues_size.attr, 1608 &dev_attr_max_engines.attr, 1609 &dev_attr_numa_node.attr, 1610 &dev_attr_max_batch_size.attr, 1611 &dev_attr_max_transfer_size.attr, 1612 &dev_attr_op_cap.attr, 1613 &dev_attr_gen_cap.attr, 1614 &dev_attr_configurable.attr, 1615 &dev_attr_clients.attr, 1616 &dev_attr_pasid_enabled.attr, 1617 &dev_attr_state.attr, 1618 &dev_attr_errors.attr, 1619 &dev_attr_max_tokens.attr, 1620 &dev_attr_max_read_buffers.attr, 1621 &dev_attr_token_limit.attr, 1622 &dev_attr_read_buffer_limit.attr, 1623 &dev_attr_cdev_major.attr, 1624 &dev_attr_cmd_status.attr, 1625 NULL, 1626 }; 1627 1628 static const struct attribute_group idxd_device_attribute_group = { 1629 .attrs = idxd_device_attributes, 1630 .is_visible = idxd_device_attr_visible, 1631 }; 1632 1633 static const struct attribute_group *idxd_attribute_groups[] = { 1634 &idxd_device_attribute_group, 1635 NULL, 1636 }; 1637 1638 static void idxd_conf_device_release(struct device *dev) 1639 { 1640 struct idxd_device *idxd = confdev_to_idxd(dev); 1641 1642 kfree(idxd->groups); 1643 bitmap_free(idxd->wq_enable_map); 1644 kfree(idxd->wqs); 1645 kfree(idxd->engines); 1646 ida_free(&idxd_ida, idxd->id); 1647 bitmap_free(idxd->opcap_bmap); 1648 kfree(idxd); 1649 } 1650 1651 struct device_type dsa_device_type = { 1652 .name = "dsa", 1653 .release = idxd_conf_device_release, 1654 .groups = idxd_attribute_groups, 1655 }; 1656 1657 struct device_type iax_device_type = { 1658 .name = "iax", 1659 .release = idxd_conf_device_release, 1660 .groups = idxd_attribute_groups, 1661 }; 1662 1663 static int idxd_register_engine_devices(struct idxd_device *idxd) 1664 { 1665 struct idxd_engine *engine; 1666 int i, j, rc; 1667 1668 for (i = 0; i < idxd->max_engines; i++) { 1669 engine = idxd->engines[i]; 1670 rc = device_add(engine_confdev(engine)); 1671 if (rc < 0) 1672 goto cleanup; 1673 } 1674 1675 return 0; 1676 1677 cleanup: 1678 j = i - 1; 1679 for (; i < idxd->max_engines; i++) { 1680 engine = idxd->engines[i]; 1681 put_device(engine_confdev(engine)); 1682 } 1683 1684 while (j--) { 1685 engine = idxd->engines[j]; 1686 device_unregister(engine_confdev(engine)); 1687 } 1688 return rc; 1689 } 1690 1691 static int idxd_register_group_devices(struct idxd_device *idxd) 1692 { 1693 struct idxd_group *group; 1694 int i, j, rc; 1695 1696 for (i = 0; i < idxd->max_groups; i++) { 1697 group = idxd->groups[i]; 1698 rc = device_add(group_confdev(group)); 1699 if (rc < 0) 1700 goto cleanup; 1701 } 1702 1703 return 0; 1704 1705 cleanup: 1706 j = i - 1; 1707 for (; i < idxd->max_groups; i++) { 1708 group = idxd->groups[i]; 1709 put_device(group_confdev(group)); 1710 } 1711 1712 while (j--) { 1713 group = idxd->groups[j]; 1714 device_unregister(group_confdev(group)); 1715 } 1716 return rc; 1717 } 1718 1719 static int idxd_register_wq_devices(struct idxd_device *idxd) 1720 { 1721 struct idxd_wq *wq; 1722 int i, rc, j; 1723 1724 for (i = 0; i < idxd->max_wqs; i++) { 1725 wq = idxd->wqs[i]; 1726 rc = device_add(wq_confdev(wq)); 1727 if (rc < 0) 1728 goto cleanup; 1729 } 1730 1731 return 0; 1732 1733 cleanup: 1734 j = i - 1; 1735 for (; i < idxd->max_wqs; i++) { 1736 wq = idxd->wqs[i]; 1737 put_device(wq_confdev(wq)); 1738 } 1739 1740 while (j--) { 1741 wq = idxd->wqs[j]; 1742 device_unregister(wq_confdev(wq)); 1743 } 1744 return rc; 1745 } 1746 1747 int idxd_register_devices(struct idxd_device *idxd) 1748 { 1749 struct device *dev = &idxd->pdev->dev; 1750 int rc, i; 1751 1752 rc = device_add(idxd_confdev(idxd)); 1753 if (rc < 0) 1754 return rc; 1755 1756 rc = idxd_register_wq_devices(idxd); 1757 if (rc < 0) { 1758 dev_dbg(dev, "WQ devices registering failed: %d\n", rc); 1759 goto err_wq; 1760 } 1761 1762 rc = idxd_register_engine_devices(idxd); 1763 if (rc < 0) { 1764 dev_dbg(dev, "Engine devices registering failed: %d\n", rc); 1765 goto err_engine; 1766 } 1767 1768 rc = idxd_register_group_devices(idxd); 1769 if (rc < 0) { 1770 dev_dbg(dev, "Group device registering failed: %d\n", rc); 1771 goto err_group; 1772 } 1773 1774 return 0; 1775 1776 err_group: 1777 for (i = 0; i < idxd->max_engines; i++) 1778 device_unregister(engine_confdev(idxd->engines[i])); 1779 err_engine: 1780 for (i = 0; i < idxd->max_wqs; i++) 1781 device_unregister(wq_confdev(idxd->wqs[i])); 1782 err_wq: 1783 device_del(idxd_confdev(idxd)); 1784 return rc; 1785 } 1786 1787 void idxd_unregister_devices(struct idxd_device *idxd) 1788 { 1789 int i; 1790 1791 for (i = 0; i < idxd->max_wqs; i++) { 1792 struct idxd_wq *wq = idxd->wqs[i]; 1793 1794 device_unregister(wq_confdev(wq)); 1795 } 1796 1797 for (i = 0; i < idxd->max_engines; i++) { 1798 struct idxd_engine *engine = idxd->engines[i]; 1799 1800 device_unregister(engine_confdev(engine)); 1801 } 1802 1803 for (i = 0; i < idxd->max_groups; i++) { 1804 struct idxd_group *group = idxd->groups[i]; 1805 1806 device_unregister(group_confdev(group)); 1807 } 1808 } 1809 1810 int idxd_register_bus_type(void) 1811 { 1812 return bus_register(&dsa_bus_type); 1813 } 1814 1815 void idxd_unregister_bus_type(void) 1816 { 1817 bus_unregister(&dsa_bus_type); 1818 } 1819