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>
7 #include <linux/device.h>
8 #include <linux/io-64-nonatomic-lo-hi.h>
9 #include <uapi/linux/idxd.h>
10 #include "registers.h"
13 static char *idxd_wq_type_names[] = {
14 [IDXD_WQT_NONE] = "none",
15 [IDXD_WQT_KERNEL] = "kernel",
16 [IDXD_WQT_USER] = "user",
19 /* IDXD engine attributes */
20 static ssize_t engine_group_id_show(struct device *dev,
21 struct device_attribute *attr, char *buf)
23 struct idxd_engine *engine = confdev_to_engine(dev);
26 return sysfs_emit(buf, "%d\n", engine->group->id);
28 return sysfs_emit(buf, "%d\n", -1);
31 static ssize_t engine_group_id_store(struct device *dev,
32 struct device_attribute *attr,
33 const char *buf, size_t count)
35 struct idxd_engine *engine = confdev_to_engine(dev);
36 struct idxd_device *idxd = engine->idxd;
39 struct idxd_group *prevg;
41 rc = kstrtol(buf, 10, &id);
45 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
48 if (id > idxd->max_groups - 1 || id < -1)
53 engine->group->num_engines--;
59 prevg = engine->group;
63 engine->group = idxd->groups[id];
64 engine->group->num_engines++;
69 static struct device_attribute dev_attr_engine_group =
70 __ATTR(group_id, 0644, engine_group_id_show,
71 engine_group_id_store);
73 static struct attribute *idxd_engine_attributes[] = {
74 &dev_attr_engine_group.attr,
78 static const struct attribute_group idxd_engine_attribute_group = {
79 .attrs = idxd_engine_attributes,
82 static const struct attribute_group *idxd_engine_attribute_groups[] = {
83 &idxd_engine_attribute_group,
87 static void idxd_conf_engine_release(struct device *dev)
89 struct idxd_engine *engine = confdev_to_engine(dev);
94 struct device_type idxd_engine_device_type = {
96 .release = idxd_conf_engine_release,
97 .groups = idxd_engine_attribute_groups,
100 /* Group attributes */
102 static void idxd_set_free_rdbufs(struct idxd_device *idxd)
106 for (i = 0, rdbufs = 0; i < idxd->max_groups; i++) {
107 struct idxd_group *g = idxd->groups[i];
109 rdbufs += g->rdbufs_reserved;
112 idxd->nr_rdbufs = idxd->max_rdbufs - rdbufs;
115 static ssize_t group_read_buffers_reserved_show(struct device *dev,
116 struct device_attribute *attr,
119 struct idxd_group *group = confdev_to_group(dev);
121 return sysfs_emit(buf, "%u\n", group->rdbufs_reserved);
124 static ssize_t group_tokens_reserved_show(struct device *dev,
125 struct device_attribute *attr,
128 dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
129 return group_read_buffers_reserved_show(dev, attr, buf);
132 static ssize_t group_read_buffers_reserved_store(struct device *dev,
133 struct device_attribute *attr,
134 const char *buf, size_t count)
136 struct idxd_group *group = confdev_to_group(dev);
137 struct idxd_device *idxd = group->idxd;
141 rc = kstrtoul(buf, 10, &val);
145 if (idxd->data->type == IDXD_TYPE_IAX)
148 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
151 if (idxd->state == IDXD_DEV_ENABLED)
154 if (val > idxd->max_rdbufs)
157 if (val > idxd->nr_rdbufs + group->rdbufs_reserved)
160 group->rdbufs_reserved = val;
161 idxd_set_free_rdbufs(idxd);
165 static ssize_t group_tokens_reserved_store(struct device *dev,
166 struct device_attribute *attr,
167 const char *buf, size_t count)
169 dev_warn_once(dev, "attribute deprecated, see read_buffers_reserved.\n");
170 return group_read_buffers_reserved_store(dev, attr, buf, count);
173 static struct device_attribute dev_attr_group_tokens_reserved =
174 __ATTR(tokens_reserved, 0644, group_tokens_reserved_show,
175 group_tokens_reserved_store);
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);
181 static ssize_t group_read_buffers_allowed_show(struct device *dev,
182 struct device_attribute *attr,
185 struct idxd_group *group = confdev_to_group(dev);
187 return sysfs_emit(buf, "%u\n", group->rdbufs_allowed);
190 static ssize_t group_tokens_allowed_show(struct device *dev,
191 struct device_attribute *attr,
194 dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
195 return group_read_buffers_allowed_show(dev, attr, buf);
198 static ssize_t group_read_buffers_allowed_store(struct device *dev,
199 struct device_attribute *attr,
200 const char *buf, size_t count)
202 struct idxd_group *group = confdev_to_group(dev);
203 struct idxd_device *idxd = group->idxd;
207 rc = kstrtoul(buf, 10, &val);
211 if (idxd->data->type == IDXD_TYPE_IAX)
214 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
217 if (idxd->state == IDXD_DEV_ENABLED)
220 if (val < 4 * group->num_engines ||
221 val > group->rdbufs_reserved + idxd->nr_rdbufs)
224 group->rdbufs_allowed = val;
228 static ssize_t group_tokens_allowed_store(struct device *dev,
229 struct device_attribute *attr,
230 const char *buf, size_t count)
232 dev_warn_once(dev, "attribute deprecated, see read_buffers_allowed.\n");
233 return group_read_buffers_allowed_store(dev, attr, buf, count);
236 static struct device_attribute dev_attr_group_tokens_allowed =
237 __ATTR(tokens_allowed, 0644, group_tokens_allowed_show,
238 group_tokens_allowed_store);
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);
244 static ssize_t group_use_read_buffer_limit_show(struct device *dev,
245 struct device_attribute *attr,
248 struct idxd_group *group = confdev_to_group(dev);
250 return sysfs_emit(buf, "%u\n", group->use_rdbuf_limit);
253 static ssize_t group_use_token_limit_show(struct device *dev,
254 struct device_attribute *attr,
257 dev_warn_once(dev, "attribute deprecated, see use_read_buffer_limit.\n");
258 return group_use_read_buffer_limit_show(dev, attr, buf);
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)
265 struct idxd_group *group = confdev_to_group(dev);
266 struct idxd_device *idxd = group->idxd;
270 rc = kstrtoul(buf, 10, &val);
274 if (idxd->data->type == IDXD_TYPE_IAX)
277 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
280 if (idxd->state == IDXD_DEV_ENABLED)
283 if (idxd->rdbuf_limit == 0)
286 group->use_rdbuf_limit = !!val;
290 static ssize_t group_use_token_limit_store(struct device *dev,
291 struct device_attribute *attr,
292 const char *buf, size_t count)
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);
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);
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);
306 static ssize_t group_engines_show(struct device *dev,
307 struct device_attribute *attr, char *buf)
309 struct idxd_group *group = confdev_to_group(dev);
311 struct idxd_device *idxd = group->idxd;
313 for (i = 0; i < idxd->max_engines; i++) {
314 struct idxd_engine *engine = idxd->engines[i];
319 if (engine->group->id == group->id)
320 rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id);
326 rc += sysfs_emit_at(buf, rc, "\n");
331 static struct device_attribute dev_attr_group_engines =
332 __ATTR(engines, 0444, group_engines_show, NULL);
334 static ssize_t group_work_queues_show(struct device *dev,
335 struct device_attribute *attr, char *buf)
337 struct idxd_group *group = confdev_to_group(dev);
339 struct idxd_device *idxd = group->idxd;
341 for (i = 0; i < idxd->max_wqs; i++) {
342 struct idxd_wq *wq = idxd->wqs[i];
347 if (wq->group->id == group->id)
348 rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id);
354 rc += sysfs_emit_at(buf, rc, "\n");
359 static struct device_attribute dev_attr_group_work_queues =
360 __ATTR(work_queues, 0444, group_work_queues_show, NULL);
362 static ssize_t group_traffic_class_a_show(struct device *dev,
363 struct device_attribute *attr,
366 struct idxd_group *group = confdev_to_group(dev);
368 return sysfs_emit(buf, "%d\n", group->tc_a);
371 static ssize_t group_traffic_class_a_store(struct device *dev,
372 struct device_attribute *attr,
373 const char *buf, size_t count)
375 struct idxd_group *group = confdev_to_group(dev);
376 struct idxd_device *idxd = group->idxd;
380 rc = kstrtol(buf, 10, &val);
384 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
387 if (idxd->state == IDXD_DEV_ENABLED)
390 if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override)
393 if (val < 0 || val > 7)
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);
404 static ssize_t group_traffic_class_b_show(struct device *dev,
405 struct device_attribute *attr,
408 struct idxd_group *group = confdev_to_group(dev);
410 return sysfs_emit(buf, "%d\n", group->tc_b);
413 static ssize_t group_traffic_class_b_store(struct device *dev,
414 struct device_attribute *attr,
415 const char *buf, size_t count)
417 struct idxd_group *group = confdev_to_group(dev);
418 struct idxd_device *idxd = group->idxd;
422 rc = kstrtol(buf, 10, &val);
426 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
429 if (idxd->state == IDXD_DEV_ENABLED)
432 if (idxd->hw.version <= DEVICE_VERSION_2 && !tc_override)
435 if (val < 0 || val > 7)
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);
446 static ssize_t group_desc_progress_limit_show(struct device *dev,
447 struct device_attribute *attr,
450 struct idxd_group *group = confdev_to_group(dev);
452 return sysfs_emit(buf, "%d\n", group->desc_progress_limit);
455 static ssize_t group_desc_progress_limit_store(struct device *dev,
456 struct device_attribute *attr,
457 const char *buf, size_t count)
459 struct idxd_group *group = confdev_to_group(dev);
462 rc = kstrtoint(buf, 10, &val);
466 if (val & ~GENMASK(1, 0))
469 group->desc_progress_limit = val;
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);
477 static ssize_t group_batch_progress_limit_show(struct device *dev,
478 struct device_attribute *attr,
481 struct idxd_group *group = confdev_to_group(dev);
483 return sysfs_emit(buf, "%d\n", group->batch_progress_limit);
486 static ssize_t group_batch_progress_limit_store(struct device *dev,
487 struct device_attribute *attr,
488 const char *buf, size_t count)
490 struct idxd_group *group = confdev_to_group(dev);
493 rc = kstrtoint(buf, 10, &val);
497 if (val & ~GENMASK(1, 0))
500 group->batch_progress_limit = val;
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,
523 static bool idxd_group_attr_progress_limit_invisible(struct attribute *attr,
524 struct idxd_device *idxd)
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;
531 static bool idxd_group_attr_read_buffers_invisible(struct attribute *attr,
532 struct idxd_device *idxd)
535 * Intel IAA does not support Read Buffer allocation control,
536 * make these attributes invisible.
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;
547 static umode_t idxd_group_attr_visible(struct kobject *kobj,
548 struct attribute *attr, int n)
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;
554 if (idxd_group_attr_progress_limit_invisible(attr, idxd))
557 if (idxd_group_attr_read_buffers_invisible(attr, idxd))
563 static const struct attribute_group idxd_group_attribute_group = {
564 .attrs = idxd_group_attributes,
565 .is_visible = idxd_group_attr_visible,
568 static const struct attribute_group *idxd_group_attribute_groups[] = {
569 &idxd_group_attribute_group,
573 static void idxd_conf_group_release(struct device *dev)
575 struct idxd_group *group = confdev_to_group(dev);
580 struct device_type idxd_group_device_type = {
582 .release = idxd_conf_group_release,
583 .groups = idxd_group_attribute_groups,
586 /* IDXD work queue attribs */
587 static ssize_t wq_clients_show(struct device *dev,
588 struct device_attribute *attr, char *buf)
590 struct idxd_wq *wq = confdev_to_wq(dev);
592 return sysfs_emit(buf, "%d\n", wq->client_count);
595 static struct device_attribute dev_attr_wq_clients =
596 __ATTR(clients, 0444, wq_clients_show, NULL);
598 static ssize_t wq_state_show(struct device *dev,
599 struct device_attribute *attr, char *buf)
601 struct idxd_wq *wq = confdev_to_wq(dev);
604 case IDXD_WQ_DISABLED:
605 return sysfs_emit(buf, "disabled\n");
606 case IDXD_WQ_ENABLED:
607 return sysfs_emit(buf, "enabled\n");
610 return sysfs_emit(buf, "unknown\n");
613 static struct device_attribute dev_attr_wq_state =
614 __ATTR(state, 0444, wq_state_show, NULL);
616 static ssize_t wq_group_id_show(struct device *dev,
617 struct device_attribute *attr, char *buf)
619 struct idxd_wq *wq = confdev_to_wq(dev);
622 return sysfs_emit(buf, "%u\n", wq->group->id);
624 return sysfs_emit(buf, "-1\n");
627 static ssize_t wq_group_id_store(struct device *dev,
628 struct device_attribute *attr,
629 const char *buf, size_t count)
631 struct idxd_wq *wq = confdev_to_wq(dev);
632 struct idxd_device *idxd = wq->idxd;
635 struct idxd_group *prevg, *group;
637 rc = kstrtol(buf, 10, &id);
641 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
644 if (wq->state != IDXD_WQ_DISABLED)
647 if (id > idxd->max_groups - 1 || id < -1)
652 wq->group->num_wqs--;
658 group = idxd->groups[id];
668 static struct device_attribute dev_attr_wq_group_id =
669 __ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store);
671 static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr,
674 struct idxd_wq *wq = confdev_to_wq(dev);
676 return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared");
679 static ssize_t wq_mode_store(struct device *dev,
680 struct device_attribute *attr, const char *buf,
683 struct idxd_wq *wq = confdev_to_wq(dev);
684 struct idxd_device *idxd = wq->idxd;
686 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
689 if (wq->state != IDXD_WQ_DISABLED)
692 if (sysfs_streq(buf, "dedicated")) {
693 set_bit(WQ_FLAG_DEDICATED, &wq->flags);
695 } else if (sysfs_streq(buf, "shared")) {
696 clear_bit(WQ_FLAG_DEDICATED, &wq->flags);
704 static struct device_attribute dev_attr_wq_mode =
705 __ATTR(mode, 0644, wq_mode_show, wq_mode_store);
707 static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr,
710 struct idxd_wq *wq = confdev_to_wq(dev);
712 return sysfs_emit(buf, "%u\n", wq->size);
715 static int total_claimed_wq_size(struct idxd_device *idxd)
720 for (i = 0; i < idxd->max_wqs; i++) {
721 struct idxd_wq *wq = idxd->wqs[i];
729 static ssize_t wq_size_store(struct device *dev,
730 struct device_attribute *attr, const char *buf,
733 struct idxd_wq *wq = confdev_to_wq(dev);
735 struct idxd_device *idxd = wq->idxd;
738 rc = kstrtoul(buf, 10, &size);
742 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
745 if (idxd->state == IDXD_DEV_ENABLED)
748 if (size + total_claimed_wq_size(idxd) - wq->size > idxd->max_wq_size)
755 static struct device_attribute dev_attr_wq_size =
756 __ATTR(size, 0644, wq_size_show, wq_size_store);
758 static ssize_t wq_priority_show(struct device *dev,
759 struct device_attribute *attr, char *buf)
761 struct idxd_wq *wq = confdev_to_wq(dev);
763 return sysfs_emit(buf, "%u\n", wq->priority);
766 static ssize_t wq_priority_store(struct device *dev,
767 struct device_attribute *attr,
768 const char *buf, size_t count)
770 struct idxd_wq *wq = confdev_to_wq(dev);
772 struct idxd_device *idxd = wq->idxd;
775 rc = kstrtoul(buf, 10, &prio);
779 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
782 if (wq->state != IDXD_WQ_DISABLED)
785 if (prio > IDXD_MAX_PRIORITY)
792 static struct device_attribute dev_attr_wq_priority =
793 __ATTR(priority, 0644, wq_priority_show, wq_priority_store);
795 static ssize_t wq_block_on_fault_show(struct device *dev,
796 struct device_attribute *attr, char *buf)
798 struct idxd_wq *wq = confdev_to_wq(dev);
800 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags));
803 static ssize_t wq_block_on_fault_store(struct device *dev,
804 struct device_attribute *attr,
805 const char *buf, size_t count)
807 struct idxd_wq *wq = confdev_to_wq(dev);
808 struct idxd_device *idxd = wq->idxd;
812 if (!idxd->hw.gen_cap.block_on_fault)
815 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
818 if (wq->state != IDXD_WQ_DISABLED)
821 rc = kstrtobool(buf, &bof);
826 set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
828 clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags);
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);
837 static ssize_t wq_threshold_show(struct device *dev,
838 struct device_attribute *attr, char *buf)
840 struct idxd_wq *wq = confdev_to_wq(dev);
842 return sysfs_emit(buf, "%u\n", wq->threshold);
845 static ssize_t wq_threshold_store(struct device *dev,
846 struct device_attribute *attr,
847 const char *buf, size_t count)
849 struct idxd_wq *wq = confdev_to_wq(dev);
850 struct idxd_device *idxd = wq->idxd;
854 rc = kstrtouint(buf, 0, &val);
858 if (val > wq->size || val <= 0)
861 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
864 if (wq->state != IDXD_WQ_DISABLED)
867 if (test_bit(WQ_FLAG_DEDICATED, &wq->flags))
875 static struct device_attribute dev_attr_wq_threshold =
876 __ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store);
878 static ssize_t wq_type_show(struct device *dev,
879 struct device_attribute *attr, char *buf)
881 struct idxd_wq *wq = confdev_to_wq(dev);
884 case IDXD_WQT_KERNEL:
885 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]);
887 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
890 return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]);
896 static ssize_t wq_type_store(struct device *dev,
897 struct device_attribute *attr, const char *buf,
900 struct idxd_wq *wq = confdev_to_wq(dev);
901 enum idxd_wq_type old_type;
903 if (wq->state != IDXD_WQ_DISABLED)
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;
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);
923 static struct device_attribute dev_attr_wq_type =
924 __ATTR(type, 0644, wq_type_show, wq_type_store);
926 static ssize_t wq_name_show(struct device *dev,
927 struct device_attribute *attr, char *buf)
929 struct idxd_wq *wq = confdev_to_wq(dev);
931 return sysfs_emit(buf, "%s\n", wq->name);
934 static ssize_t wq_name_store(struct device *dev,
935 struct device_attribute *attr, const char *buf,
938 struct idxd_wq *wq = confdev_to_wq(dev);
941 if (wq->state != IDXD_WQ_DISABLED)
944 if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0)
948 * This is temporarily placed here until we have SVM support for
951 if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd))
954 input = kstrndup(buf, count, GFP_KERNEL);
959 memset(wq->name, 0, WQ_NAME_SIZE + 1);
960 sprintf(wq->name, "%s", pos);
965 static struct device_attribute dev_attr_wq_name =
966 __ATTR(name, 0644, wq_name_show, wq_name_store);
968 static ssize_t wq_cdev_minor_show(struct device *dev,
969 struct device_attribute *attr, char *buf)
971 struct idxd_wq *wq = confdev_to_wq(dev);
974 mutex_lock(&wq->wq_lock);
976 minor = wq->idxd_cdev->minor;
977 mutex_unlock(&wq->wq_lock);
981 return sysfs_emit(buf, "%d\n", minor);
984 static struct device_attribute dev_attr_wq_cdev_minor =
985 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL);
987 static int __get_sysfs_u64(const char *buf, u64 *val)
991 rc = kstrtou64(buf, 0, val);
998 *val = roundup_pow_of_two(*val);
1002 static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr,
1005 struct idxd_wq *wq = confdev_to_wq(dev);
1007 return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes);
1010 static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr,
1011 const char *buf, size_t count)
1013 struct idxd_wq *wq = confdev_to_wq(dev);
1014 struct idxd_device *idxd = wq->idxd;
1018 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1021 if (wq->state != IDXD_WQ_DISABLED)
1024 rc = __get_sysfs_u64(buf, &xfer_size);
1028 if (xfer_size > idxd->max_xfer_bytes)
1031 wq->max_xfer_bytes = xfer_size;
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);
1040 static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf)
1042 struct idxd_wq *wq = confdev_to_wq(dev);
1044 return sysfs_emit(buf, "%u\n", wq->max_batch_size);
1047 static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr,
1048 const char *buf, size_t count)
1050 struct idxd_wq *wq = confdev_to_wq(dev);
1051 struct idxd_device *idxd = wq->idxd;
1055 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1058 if (wq->state != IDXD_WQ_DISABLED)
1061 rc = __get_sysfs_u64(buf, &batch_size);
1065 if (batch_size > idxd->max_batch_size)
1068 idxd_wq_set_max_batch_size(idxd->data->type, wq, (u32)batch_size);
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);
1076 static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf)
1078 struct idxd_wq *wq = confdev_to_wq(dev);
1080 return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_ATS_DISABLE, &wq->flags));
1083 static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr,
1084 const char *buf, size_t count)
1086 struct idxd_wq *wq = confdev_to_wq(dev);
1087 struct idxd_device *idxd = wq->idxd;
1091 if (wq->state != IDXD_WQ_DISABLED)
1094 if (!idxd->hw.wq_cap.wq_ats_support)
1097 rc = kstrtobool(buf, &ats_dis);
1102 set_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1104 clear_bit(WQ_FLAG_ATS_DISABLE, &wq->flags);
1109 static struct device_attribute dev_attr_wq_ats_disable =
1110 __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store);
1112 static ssize_t wq_occupancy_show(struct device *dev, struct device_attribute *attr, char *buf)
1114 struct idxd_wq *wq = confdev_to_wq(dev);
1115 struct idxd_device *idxd = wq->idxd;
1118 if (!idxd->hw.wq_cap.occupancy)
1121 offset = WQCFG_OFFSET(idxd, wq->id, WQCFG_OCCUP_IDX);
1122 occup = ioread32(idxd->reg_base + offset) & WQCFG_OCCUP_MASK;
1124 return sysfs_emit(buf, "%u\n", occup);
1127 static struct device_attribute dev_attr_wq_occupancy =
1128 __ATTR(occupancy, 0444, wq_occupancy_show, NULL);
1130 static ssize_t wq_enqcmds_retries_show(struct device *dev,
1131 struct device_attribute *attr, char *buf)
1133 struct idxd_wq *wq = confdev_to_wq(dev);
1135 if (wq_dedicated(wq))
1138 return sysfs_emit(buf, "%u\n", wq->enqcmds_retries);
1141 static ssize_t wq_enqcmds_retries_store(struct device *dev, struct device_attribute *attr,
1142 const char *buf, size_t count)
1144 struct idxd_wq *wq = confdev_to_wq(dev);
1146 unsigned int retries;
1148 if (wq_dedicated(wq))
1151 rc = kstrtouint(buf, 10, &retries);
1155 if (retries > IDXD_ENQCMDS_MAX_RETRIES)
1156 retries = IDXD_ENQCMDS_MAX_RETRIES;
1158 wq->enqcmds_retries = retries;
1162 static struct device_attribute dev_attr_wq_enqcmds_retries =
1163 __ATTR(enqcmds_retries, 0644, wq_enqcmds_retries_show, wq_enqcmds_retries_store);
1165 static ssize_t wq_op_config_show(struct device *dev,
1166 struct device_attribute *attr, char *buf)
1168 struct idxd_wq *wq = confdev_to_wq(dev);
1170 return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, wq->opcap_bmap);
1173 static int idxd_verify_supported_opcap(struct idxd_device *idxd, unsigned long *opmask)
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.
1183 for_each_set_bit(bit, opmask, IDXD_MAX_OPCAP_BITS) {
1184 if (!test_bit(bit, idxd->opcap_bmap))
1191 static ssize_t wq_op_config_store(struct device *dev, struct device_attribute *attr,
1192 const char *buf, size_t count)
1194 struct idxd_wq *wq = confdev_to_wq(dev);
1195 struct idxd_device *idxd = wq->idxd;
1196 unsigned long *opmask;
1199 if (wq->state != IDXD_WQ_DISABLED)
1202 opmask = bitmap_zalloc(IDXD_MAX_OPCAP_BITS, GFP_KERNEL);
1206 rc = bitmap_parse(buf, count, opmask, IDXD_MAX_OPCAP_BITS);
1210 rc = idxd_verify_supported_opcap(idxd, opmask);
1214 bitmap_copy(wq->opcap_bmap, opmask, IDXD_MAX_OPCAP_BITS);
1216 bitmap_free(opmask);
1220 bitmap_free(opmask);
1224 static struct device_attribute dev_attr_wq_op_config =
1225 __ATTR(op_config, 0644, wq_op_config_show, wq_op_config_store);
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,
1248 static bool idxd_wq_attr_op_config_invisible(struct attribute *attr,
1249 struct idxd_device *idxd)
1251 return attr == &dev_attr_wq_op_config.attr &&
1252 !idxd->hw.wq_cap.op_config;
1255 static bool idxd_wq_attr_max_batch_size_invisible(struct attribute *attr,
1256 struct idxd_device *idxd)
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;
1263 static umode_t idxd_wq_attr_visible(struct kobject *kobj,
1264 struct attribute *attr, int n)
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;
1270 if (idxd_wq_attr_op_config_invisible(attr, idxd))
1273 if (idxd_wq_attr_max_batch_size_invisible(attr, idxd))
1279 static const struct attribute_group idxd_wq_attribute_group = {
1280 .attrs = idxd_wq_attributes,
1281 .is_visible = idxd_wq_attr_visible,
1284 static const struct attribute_group *idxd_wq_attribute_groups[] = {
1285 &idxd_wq_attribute_group,
1289 static void idxd_conf_wq_release(struct device *dev)
1291 struct idxd_wq *wq = confdev_to_wq(dev);
1293 bitmap_free(wq->opcap_bmap);
1298 struct device_type idxd_wq_device_type = {
1300 .release = idxd_conf_wq_release,
1301 .groups = idxd_wq_attribute_groups,
1304 /* IDXD device attribs */
1305 static ssize_t version_show(struct device *dev, struct device_attribute *attr,
1308 struct idxd_device *idxd = confdev_to_idxd(dev);
1310 return sysfs_emit(buf, "%#x\n", idxd->hw.version);
1312 static DEVICE_ATTR_RO(version);
1314 static ssize_t max_work_queues_size_show(struct device *dev,
1315 struct device_attribute *attr,
1318 struct idxd_device *idxd = confdev_to_idxd(dev);
1320 return sysfs_emit(buf, "%u\n", idxd->max_wq_size);
1322 static DEVICE_ATTR_RO(max_work_queues_size);
1324 static ssize_t max_groups_show(struct device *dev,
1325 struct device_attribute *attr, char *buf)
1327 struct idxd_device *idxd = confdev_to_idxd(dev);
1329 return sysfs_emit(buf, "%u\n", idxd->max_groups);
1331 static DEVICE_ATTR_RO(max_groups);
1333 static ssize_t max_work_queues_show(struct device *dev,
1334 struct device_attribute *attr, char *buf)
1336 struct idxd_device *idxd = confdev_to_idxd(dev);
1338 return sysfs_emit(buf, "%u\n", idxd->max_wqs);
1340 static DEVICE_ATTR_RO(max_work_queues);
1342 static ssize_t max_engines_show(struct device *dev,
1343 struct device_attribute *attr, char *buf)
1345 struct idxd_device *idxd = confdev_to_idxd(dev);
1347 return sysfs_emit(buf, "%u\n", idxd->max_engines);
1349 static DEVICE_ATTR_RO(max_engines);
1351 static ssize_t numa_node_show(struct device *dev,
1352 struct device_attribute *attr, char *buf)
1354 struct idxd_device *idxd = confdev_to_idxd(dev);
1356 return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
1358 static DEVICE_ATTR_RO(numa_node);
1360 static ssize_t max_batch_size_show(struct device *dev,
1361 struct device_attribute *attr, char *buf)
1363 struct idxd_device *idxd = confdev_to_idxd(dev);
1365 return sysfs_emit(buf, "%u\n", idxd->max_batch_size);
1367 static DEVICE_ATTR_RO(max_batch_size);
1369 static ssize_t max_transfer_size_show(struct device *dev,
1370 struct device_attribute *attr,
1373 struct idxd_device *idxd = confdev_to_idxd(dev);
1375 return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes);
1377 static DEVICE_ATTR_RO(max_transfer_size);
1379 static ssize_t op_cap_show(struct device *dev,
1380 struct device_attribute *attr, char *buf)
1382 struct idxd_device *idxd = confdev_to_idxd(dev);
1384 return sysfs_emit(buf, "%*pb\n", IDXD_MAX_OPCAP_BITS, idxd->opcap_bmap);
1386 static DEVICE_ATTR_RO(op_cap);
1388 static ssize_t gen_cap_show(struct device *dev,
1389 struct device_attribute *attr, char *buf)
1391 struct idxd_device *idxd = confdev_to_idxd(dev);
1393 return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits);
1395 static DEVICE_ATTR_RO(gen_cap);
1397 static ssize_t configurable_show(struct device *dev,
1398 struct device_attribute *attr, char *buf)
1400 struct idxd_device *idxd = confdev_to_idxd(dev);
1402 return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
1404 static DEVICE_ATTR_RO(configurable);
1406 static ssize_t clients_show(struct device *dev,
1407 struct device_attribute *attr, char *buf)
1409 struct idxd_device *idxd = confdev_to_idxd(dev);
1412 spin_lock(&idxd->dev_lock);
1413 for (i = 0; i < idxd->max_wqs; i++) {
1414 struct idxd_wq *wq = idxd->wqs[i];
1416 count += wq->client_count;
1418 spin_unlock(&idxd->dev_lock);
1420 return sysfs_emit(buf, "%d\n", count);
1422 static DEVICE_ATTR_RO(clients);
1424 static ssize_t pasid_enabled_show(struct device *dev,
1425 struct device_attribute *attr, char *buf)
1427 struct idxd_device *idxd = confdev_to_idxd(dev);
1429 return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
1431 static DEVICE_ATTR_RO(pasid_enabled);
1433 static ssize_t state_show(struct device *dev,
1434 struct device_attribute *attr, char *buf)
1436 struct idxd_device *idxd = confdev_to_idxd(dev);
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");
1447 return sysfs_emit(buf, "unknown\n");
1449 static DEVICE_ATTR_RO(state);
1451 static ssize_t errors_show(struct device *dev,
1452 struct device_attribute *attr, char *buf)
1454 struct idxd_device *idxd = confdev_to_idxd(dev);
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);
1462 out += sysfs_emit_at(buf, out, "\n");
1465 static DEVICE_ATTR_RO(errors);
1467 static ssize_t max_read_buffers_show(struct device *dev,
1468 struct device_attribute *attr, char *buf)
1470 struct idxd_device *idxd = confdev_to_idxd(dev);
1472 return sysfs_emit(buf, "%u\n", idxd->max_rdbufs);
1475 static ssize_t max_tokens_show(struct device *dev,
1476 struct device_attribute *attr, char *buf)
1478 dev_warn_once(dev, "attribute deprecated, see max_read_buffers.\n");
1479 return max_read_buffers_show(dev, attr, buf);
1482 static DEVICE_ATTR_RO(max_tokens); /* deprecated */
1483 static DEVICE_ATTR_RO(max_read_buffers);
1485 static ssize_t read_buffer_limit_show(struct device *dev,
1486 struct device_attribute *attr, char *buf)
1488 struct idxd_device *idxd = confdev_to_idxd(dev);
1490 return sysfs_emit(buf, "%u\n", idxd->rdbuf_limit);
1493 static ssize_t token_limit_show(struct device *dev,
1494 struct device_attribute *attr, char *buf)
1496 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit.\n");
1497 return read_buffer_limit_show(dev, attr, buf);
1500 static ssize_t read_buffer_limit_store(struct device *dev,
1501 struct device_attribute *attr,
1502 const char *buf, size_t count)
1504 struct idxd_device *idxd = confdev_to_idxd(dev);
1508 rc = kstrtoul(buf, 10, &val);
1512 if (idxd->state == IDXD_DEV_ENABLED)
1515 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1518 if (!idxd->hw.group_cap.rdbuf_limit)
1521 if (val > idxd->hw.group_cap.total_rdbufs)
1524 idxd->rdbuf_limit = val;
1528 static ssize_t token_limit_store(struct device *dev,
1529 struct device_attribute *attr,
1530 const char *buf, size_t count)
1532 dev_warn_once(dev, "attribute deprecated, see read_buffer_limit\n");
1533 return read_buffer_limit_store(dev, attr, buf, count);
1536 static DEVICE_ATTR_RW(token_limit); /* deprecated */
1537 static DEVICE_ATTR_RW(read_buffer_limit);
1539 static ssize_t cdev_major_show(struct device *dev,
1540 struct device_attribute *attr, char *buf)
1542 struct idxd_device *idxd = confdev_to_idxd(dev);
1544 return sysfs_emit(buf, "%u\n", idxd->major);
1546 static DEVICE_ATTR_RO(cdev_major);
1548 static ssize_t cmd_status_show(struct device *dev,
1549 struct device_attribute *attr, char *buf)
1551 struct idxd_device *idxd = confdev_to_idxd(dev);
1553 return sysfs_emit(buf, "%#x\n", idxd->cmd_status);
1556 static ssize_t cmd_status_store(struct device *dev, struct device_attribute *attr,
1557 const char *buf, size_t count)
1559 struct idxd_device *idxd = confdev_to_idxd(dev);
1561 idxd->cmd_status = 0;
1564 static DEVICE_ATTR_RW(cmd_status);
1566 static bool idxd_device_attr_max_batch_size_invisible(struct attribute *attr,
1567 struct idxd_device *idxd)
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;
1574 static bool idxd_device_attr_read_buffers_invisible(struct attribute *attr,
1575 struct idxd_device *idxd)
1578 * Intel IAA does not support Read Buffer allocation control,
1579 * make these attributes invisible.
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;
1588 static umode_t idxd_device_attr_visible(struct kobject *kobj,
1589 struct attribute *attr, int n)
1591 struct device *dev = container_of(kobj, struct device, kobj);
1592 struct idxd_device *idxd = confdev_to_idxd(dev);
1594 if (idxd_device_attr_max_batch_size_invisible(attr, idxd))
1597 if (idxd_device_attr_read_buffers_invisible(attr, idxd))
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,
1628 static const struct attribute_group idxd_device_attribute_group = {
1629 .attrs = idxd_device_attributes,
1630 .is_visible = idxd_device_attr_visible,
1633 static const struct attribute_group *idxd_attribute_groups[] = {
1634 &idxd_device_attribute_group,
1638 static void idxd_conf_device_release(struct device *dev)
1640 struct idxd_device *idxd = confdev_to_idxd(dev);
1642 kfree(idxd->groups);
1643 bitmap_free(idxd->wq_enable_map);
1645 kfree(idxd->engines);
1646 ida_free(&idxd_ida, idxd->id);
1647 bitmap_free(idxd->opcap_bmap);
1651 struct device_type dsa_device_type = {
1653 .release = idxd_conf_device_release,
1654 .groups = idxd_attribute_groups,
1657 struct device_type iax_device_type = {
1659 .release = idxd_conf_device_release,
1660 .groups = idxd_attribute_groups,
1663 static int idxd_register_engine_devices(struct idxd_device *idxd)
1665 struct idxd_engine *engine;
1668 for (i = 0; i < idxd->max_engines; i++) {
1669 engine = idxd->engines[i];
1670 rc = device_add(engine_confdev(engine));
1679 for (; i < idxd->max_engines; i++) {
1680 engine = idxd->engines[i];
1681 put_device(engine_confdev(engine));
1685 engine = idxd->engines[j];
1686 device_unregister(engine_confdev(engine));
1691 static int idxd_register_group_devices(struct idxd_device *idxd)
1693 struct idxd_group *group;
1696 for (i = 0; i < idxd->max_groups; i++) {
1697 group = idxd->groups[i];
1698 rc = device_add(group_confdev(group));
1707 for (; i < idxd->max_groups; i++) {
1708 group = idxd->groups[i];
1709 put_device(group_confdev(group));
1713 group = idxd->groups[j];
1714 device_unregister(group_confdev(group));
1719 static int idxd_register_wq_devices(struct idxd_device *idxd)
1724 for (i = 0; i < idxd->max_wqs; i++) {
1726 rc = device_add(wq_confdev(wq));
1735 for (; i < idxd->max_wqs; i++) {
1737 put_device(wq_confdev(wq));
1742 device_unregister(wq_confdev(wq));
1747 int idxd_register_devices(struct idxd_device *idxd)
1749 struct device *dev = &idxd->pdev->dev;
1752 rc = device_add(idxd_confdev(idxd));
1756 rc = idxd_register_wq_devices(idxd);
1758 dev_dbg(dev, "WQ devices registering failed: %d\n", rc);
1762 rc = idxd_register_engine_devices(idxd);
1764 dev_dbg(dev, "Engine devices registering failed: %d\n", rc);
1768 rc = idxd_register_group_devices(idxd);
1770 dev_dbg(dev, "Group device registering failed: %d\n", rc);
1777 for (i = 0; i < idxd->max_engines; i++)
1778 device_unregister(engine_confdev(idxd->engines[i]));
1780 for (i = 0; i < idxd->max_wqs; i++)
1781 device_unregister(wq_confdev(idxd->wqs[i]));
1783 device_del(idxd_confdev(idxd));
1787 void idxd_unregister_devices(struct idxd_device *idxd)
1791 for (i = 0; i < idxd->max_wqs; i++) {
1792 struct idxd_wq *wq = idxd->wqs[i];
1794 device_unregister(wq_confdev(wq));
1797 for (i = 0; i < idxd->max_engines; i++) {
1798 struct idxd_engine *engine = idxd->engines[i];
1800 device_unregister(engine_confdev(engine));
1803 for (i = 0; i < idxd->max_groups; i++) {
1804 struct idxd_group *group = idxd->groups[i];
1806 device_unregister(group_confdev(group));
1810 int idxd_register_bus_type(void)
1812 return bus_register(&dsa_bus_type);
1815 void idxd_unregister_bus_type(void)
1817 bus_unregister(&dsa_bus_type);