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 static void idxd_conf_device_release(struct device *dev)
21 dev_dbg(dev, "%s for %s\n", __func__, dev_name(dev));
24 static struct device_type idxd_group_device_type = {
26 .release = idxd_conf_device_release,
29 static struct device_type idxd_wq_device_type = {
31 .release = idxd_conf_device_release,
34 static struct device_type idxd_engine_device_type = {
36 .release = idxd_conf_device_release,
39 static struct device_type dsa_device_type = {
41 .release = idxd_conf_device_release,
44 static inline bool is_dsa_dev(struct device *dev)
46 return dev ? dev->type == &dsa_device_type : false;
49 static inline bool is_idxd_dev(struct device *dev)
51 return is_dsa_dev(dev);
54 static inline bool is_idxd_wq_dev(struct device *dev)
56 return dev ? dev->type == &idxd_wq_device_type : false;
59 static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq)
61 if (wq->type == IDXD_WQT_KERNEL &&
62 strcmp(wq->name, "dmaengine") == 0)
67 static inline bool is_idxd_wq_cdev(struct idxd_wq *wq)
69 return wq->type == IDXD_WQT_USER;
72 static int idxd_config_bus_match(struct device *dev,
73 struct device_driver *drv)
77 if (is_idxd_dev(dev)) {
78 struct idxd_device *idxd = confdev_to_idxd(dev);
80 if (idxd->state != IDXD_DEV_CONF_READY)
83 } else if (is_idxd_wq_dev(dev)) {
84 struct idxd_wq *wq = confdev_to_wq(dev);
85 struct idxd_device *idxd = wq->idxd;
87 if (idxd->state < IDXD_DEV_CONF_READY)
90 if (wq->state != IDXD_WQ_DISABLED) {
91 dev_dbg(dev, "%s not disabled\n", dev_name(dev));
98 dev_dbg(dev, "%s matched\n", dev_name(dev));
103 static int idxd_config_bus_probe(struct device *dev)
108 dev_dbg(dev, "%s called\n", __func__);
110 if (is_idxd_dev(dev)) {
111 struct idxd_device *idxd = confdev_to_idxd(dev);
113 if (idxd->state != IDXD_DEV_CONF_READY) {
114 dev_warn(dev, "Device not ready for config\n");
118 if (!try_module_get(THIS_MODULE))
121 spin_lock_irqsave(&idxd->dev_lock, flags);
123 /* Perform IDXD configuration and enabling */
124 rc = idxd_device_config(idxd);
126 spin_unlock_irqrestore(&idxd->dev_lock, flags);
127 dev_warn(dev, "Device config failed: %d\n", rc);
132 rc = idxd_device_enable(idxd);
134 spin_unlock_irqrestore(&idxd->dev_lock, flags);
135 dev_warn(dev, "Device enable failed: %d\n", rc);
139 spin_unlock_irqrestore(&idxd->dev_lock, flags);
140 dev_info(dev, "Device %s enabled\n", dev_name(dev));
142 rc = idxd_register_dma_device(idxd);
144 spin_unlock_irqrestore(&idxd->dev_lock, flags);
145 dev_dbg(dev, "Failed to register dmaengine device\n");
149 } else if (is_idxd_wq_dev(dev)) {
150 struct idxd_wq *wq = confdev_to_wq(dev);
151 struct idxd_device *idxd = wq->idxd;
153 mutex_lock(&wq->wq_lock);
155 if (idxd->state != IDXD_DEV_ENABLED) {
156 mutex_unlock(&wq->wq_lock);
157 dev_warn(dev, "Enabling while device not enabled.\n");
161 if (wq->state != IDXD_WQ_DISABLED) {
162 mutex_unlock(&wq->wq_lock);
163 dev_warn(dev, "WQ %d already enabled.\n", wq->id);
168 mutex_unlock(&wq->wq_lock);
169 dev_warn(dev, "WQ not attached to group.\n");
173 if (strlen(wq->name) == 0) {
174 mutex_unlock(&wq->wq_lock);
175 dev_warn(dev, "WQ name not set.\n");
179 rc = idxd_wq_alloc_resources(wq);
181 mutex_unlock(&wq->wq_lock);
182 dev_warn(dev, "WQ resource alloc failed\n");
186 spin_lock_irqsave(&idxd->dev_lock, flags);
187 rc = idxd_device_config(idxd);
189 spin_unlock_irqrestore(&idxd->dev_lock, flags);
190 mutex_unlock(&wq->wq_lock);
191 dev_warn(dev, "Writing WQ %d config failed: %d\n",
196 rc = idxd_wq_enable(wq);
198 spin_unlock_irqrestore(&idxd->dev_lock, flags);
199 mutex_unlock(&wq->wq_lock);
200 dev_warn(dev, "WQ %d enabling failed: %d\n",
204 spin_unlock_irqrestore(&idxd->dev_lock, flags);
206 rc = idxd_wq_map_portal(wq);
208 dev_warn(dev, "wq portal mapping failed: %d\n", rc);
209 rc = idxd_wq_disable(wq);
211 dev_warn(dev, "IDXD wq disable failed\n");
212 spin_unlock_irqrestore(&idxd->dev_lock, flags);
213 mutex_unlock(&wq->wq_lock);
217 wq->client_count = 0;
219 dev_info(dev, "wq %s enabled\n", dev_name(&wq->conf_dev));
221 if (is_idxd_wq_dmaengine(wq)) {
222 rc = idxd_register_dma_channel(wq);
224 dev_dbg(dev, "DMA channel register failed\n");
225 mutex_unlock(&wq->wq_lock);
228 } else if (is_idxd_wq_cdev(wq)) {
229 rc = idxd_wq_add_cdev(wq);
231 dev_dbg(dev, "Cdev creation failed\n");
232 mutex_unlock(&wq->wq_lock);
237 mutex_unlock(&wq->wq_lock);
244 static void disable_wq(struct idxd_wq *wq)
246 struct idxd_device *idxd = wq->idxd;
247 struct device *dev = &idxd->pdev->dev;
251 mutex_lock(&wq->wq_lock);
252 dev_dbg(dev, "%s removing WQ %s\n", __func__, dev_name(&wq->conf_dev));
253 if (wq->state == IDXD_WQ_DISABLED) {
254 mutex_unlock(&wq->wq_lock);
258 if (is_idxd_wq_dmaengine(wq))
259 idxd_unregister_dma_channel(wq);
260 else if (is_idxd_wq_cdev(wq))
261 idxd_wq_del_cdev(wq);
263 if (idxd_wq_refcount(wq))
264 dev_warn(dev, "Clients has claim on wq %d: %d\n",
265 wq->id, idxd_wq_refcount(wq));
267 idxd_wq_unmap_portal(wq);
269 spin_lock_irqsave(&idxd->dev_lock, flags);
270 rc = idxd_wq_disable(wq);
271 spin_unlock_irqrestore(&idxd->dev_lock, flags);
273 idxd_wq_free_resources(wq);
274 wq->client_count = 0;
275 mutex_unlock(&wq->wq_lock);
278 dev_warn(dev, "Failed to disable %s: %d\n",
279 dev_name(&wq->conf_dev), rc);
281 dev_info(dev, "wq %s disabled\n", dev_name(&wq->conf_dev));
284 static int idxd_config_bus_remove(struct device *dev)
289 dev_dbg(dev, "%s called for %s\n", __func__, dev_name(dev));
291 /* disable workqueue here */
292 if (is_idxd_wq_dev(dev)) {
293 struct idxd_wq *wq = confdev_to_wq(dev);
296 } else if (is_idxd_dev(dev)) {
297 struct idxd_device *idxd = confdev_to_idxd(dev);
300 dev_dbg(dev, "%s removing dev %s\n", __func__,
301 dev_name(&idxd->conf_dev));
302 for (i = 0; i < idxd->max_wqs; i++) {
303 struct idxd_wq *wq = &idxd->wqs[i];
305 if (wq->state == IDXD_WQ_DISABLED)
307 dev_warn(dev, "Active wq %d on disable %s.\n", i,
308 dev_name(&idxd->conf_dev));
309 device_release_driver(&wq->conf_dev);
312 idxd_unregister_dma_device(idxd);
313 spin_lock_irqsave(&idxd->dev_lock, flags);
314 rc = idxd_device_disable(idxd);
315 spin_unlock_irqrestore(&idxd->dev_lock, flags);
316 module_put(THIS_MODULE);
318 dev_warn(dev, "Device disable failed\n");
320 dev_info(dev, "Device %s disabled\n", dev_name(dev));
327 static void idxd_config_bus_shutdown(struct device *dev)
329 dev_dbg(dev, "%s called\n", __func__);
332 struct bus_type dsa_bus_type = {
334 .match = idxd_config_bus_match,
335 .probe = idxd_config_bus_probe,
336 .remove = idxd_config_bus_remove,
337 .shutdown = idxd_config_bus_shutdown,
340 static struct bus_type *idxd_bus_types[] = {
344 static struct idxd_device_driver dsa_drv = {
347 .bus = &dsa_bus_type,
348 .owner = THIS_MODULE,
349 .mod_name = KBUILD_MODNAME,
353 static struct idxd_device_driver *idxd_drvs[] = {
357 struct bus_type *idxd_get_bus_type(struct idxd_device *idxd)
359 return idxd_bus_types[idxd->type];
362 static struct device_type *idxd_get_device_type(struct idxd_device *idxd)
364 if (idxd->type == IDXD_TYPE_DSA)
365 return &dsa_device_type;
370 /* IDXD generic driver setup */
371 int idxd_register_driver(void)
375 for (i = 0; i < IDXD_TYPE_MAX; i++) {
376 rc = driver_register(&idxd_drvs[i]->drv);
385 driver_unregister(&idxd_drvs[i]->drv);
389 void idxd_unregister_driver(void)
393 for (i = 0; i < IDXD_TYPE_MAX; i++)
394 driver_unregister(&idxd_drvs[i]->drv);
397 /* IDXD engine attributes */
398 static ssize_t engine_group_id_show(struct device *dev,
399 struct device_attribute *attr, char *buf)
401 struct idxd_engine *engine =
402 container_of(dev, struct idxd_engine, conf_dev);
405 return sprintf(buf, "%d\n", engine->group->id);
407 return sprintf(buf, "%d\n", -1);
410 static ssize_t engine_group_id_store(struct device *dev,
411 struct device_attribute *attr,
412 const char *buf, size_t count)
414 struct idxd_engine *engine =
415 container_of(dev, struct idxd_engine, conf_dev);
416 struct idxd_device *idxd = engine->idxd;
419 struct idxd_group *prevg, *group;
421 rc = kstrtol(buf, 10, &id);
425 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
428 if (id > idxd->max_groups - 1 || id < -1)
433 engine->group->num_engines--;
434 engine->group = NULL;
439 group = &idxd->groups[id];
440 prevg = engine->group;
443 prevg->num_engines--;
444 engine->group = &idxd->groups[id];
445 engine->group->num_engines++;
450 static struct device_attribute dev_attr_engine_group =
451 __ATTR(group_id, 0644, engine_group_id_show,
452 engine_group_id_store);
454 static struct attribute *idxd_engine_attributes[] = {
455 &dev_attr_engine_group.attr,
459 static const struct attribute_group idxd_engine_attribute_group = {
460 .attrs = idxd_engine_attributes,
463 static const struct attribute_group *idxd_engine_attribute_groups[] = {
464 &idxd_engine_attribute_group,
468 /* Group attributes */
470 static void idxd_set_free_tokens(struct idxd_device *idxd)
474 for (i = 0, tokens = 0; i < idxd->max_groups; i++) {
475 struct idxd_group *g = &idxd->groups[i];
477 tokens += g->tokens_reserved;
480 idxd->nr_tokens = idxd->max_tokens - tokens;
483 static ssize_t group_tokens_reserved_show(struct device *dev,
484 struct device_attribute *attr,
487 struct idxd_group *group =
488 container_of(dev, struct idxd_group, conf_dev);
490 return sprintf(buf, "%u\n", group->tokens_reserved);
493 static ssize_t group_tokens_reserved_store(struct device *dev,
494 struct device_attribute *attr,
495 const char *buf, size_t count)
497 struct idxd_group *group =
498 container_of(dev, struct idxd_group, conf_dev);
499 struct idxd_device *idxd = group->idxd;
503 rc = kstrtoul(buf, 10, &val);
507 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
510 if (idxd->state == IDXD_DEV_ENABLED)
513 if (idxd->token_limit == 0)
516 if (val > idxd->max_tokens)
519 if (val > idxd->nr_tokens)
522 group->tokens_reserved = val;
523 idxd_set_free_tokens(idxd);
527 static struct device_attribute dev_attr_group_tokens_reserved =
528 __ATTR(tokens_reserved, 0644, group_tokens_reserved_show,
529 group_tokens_reserved_store);
531 static ssize_t group_tokens_allowed_show(struct device *dev,
532 struct device_attribute *attr,
535 struct idxd_group *group =
536 container_of(dev, struct idxd_group, conf_dev);
538 return sprintf(buf, "%u\n", group->tokens_allowed);
541 static ssize_t group_tokens_allowed_store(struct device *dev,
542 struct device_attribute *attr,
543 const char *buf, size_t count)
545 struct idxd_group *group =
546 container_of(dev, struct idxd_group, conf_dev);
547 struct idxd_device *idxd = group->idxd;
551 rc = kstrtoul(buf, 10, &val);
555 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
558 if (idxd->state == IDXD_DEV_ENABLED)
561 if (idxd->token_limit == 0)
563 if (val < 4 * group->num_engines ||
564 val > group->tokens_reserved + idxd->nr_tokens)
567 group->tokens_allowed = val;
571 static struct device_attribute dev_attr_group_tokens_allowed =
572 __ATTR(tokens_allowed, 0644, group_tokens_allowed_show,
573 group_tokens_allowed_store);
575 static ssize_t group_use_token_limit_show(struct device *dev,
576 struct device_attribute *attr,
579 struct idxd_group *group =
580 container_of(dev, struct idxd_group, conf_dev);
582 return sprintf(buf, "%u\n", group->use_token_limit);
585 static ssize_t group_use_token_limit_store(struct device *dev,
586 struct device_attribute *attr,
587 const char *buf, size_t count)
589 struct idxd_group *group =
590 container_of(dev, struct idxd_group, conf_dev);
591 struct idxd_device *idxd = group->idxd;
595 rc = kstrtoul(buf, 10, &val);
599 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
602 if (idxd->state == IDXD_DEV_ENABLED)
605 if (idxd->token_limit == 0)
608 group->use_token_limit = !!val;
612 static struct device_attribute dev_attr_group_use_token_limit =
613 __ATTR(use_token_limit, 0644, group_use_token_limit_show,
614 group_use_token_limit_store);
616 static ssize_t group_engines_show(struct device *dev,
617 struct device_attribute *attr, char *buf)
619 struct idxd_group *group =
620 container_of(dev, struct idxd_group, conf_dev);
623 struct idxd_device *idxd = group->idxd;
625 for (i = 0; i < idxd->max_engines; i++) {
626 struct idxd_engine *engine = &idxd->engines[i];
631 if (engine->group->id == group->id)
632 rc += sprintf(tmp + rc, "engine%d.%d ",
633 idxd->id, engine->id);
637 rc += sprintf(tmp + rc, "\n");
642 static struct device_attribute dev_attr_group_engines =
643 __ATTR(engines, 0444, group_engines_show, NULL);
645 static ssize_t group_work_queues_show(struct device *dev,
646 struct device_attribute *attr, char *buf)
648 struct idxd_group *group =
649 container_of(dev, struct idxd_group, conf_dev);
652 struct idxd_device *idxd = group->idxd;
654 for (i = 0; i < idxd->max_wqs; i++) {
655 struct idxd_wq *wq = &idxd->wqs[i];
660 if (wq->group->id == group->id)
661 rc += sprintf(tmp + rc, "wq%d.%d ",
666 rc += sprintf(tmp + rc, "\n");
671 static struct device_attribute dev_attr_group_work_queues =
672 __ATTR(work_queues, 0444, group_work_queues_show, NULL);
674 static ssize_t group_traffic_class_a_show(struct device *dev,
675 struct device_attribute *attr,
678 struct idxd_group *group =
679 container_of(dev, struct idxd_group, conf_dev);
681 return sprintf(buf, "%d\n", group->tc_a);
684 static ssize_t group_traffic_class_a_store(struct device *dev,
685 struct device_attribute *attr,
686 const char *buf, size_t count)
688 struct idxd_group *group =
689 container_of(dev, struct idxd_group, conf_dev);
690 struct idxd_device *idxd = group->idxd;
694 rc = kstrtol(buf, 10, &val);
698 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
701 if (idxd->state == IDXD_DEV_ENABLED)
704 if (val < 0 || val > 7)
711 static struct device_attribute dev_attr_group_traffic_class_a =
712 __ATTR(traffic_class_a, 0644, group_traffic_class_a_show,
713 group_traffic_class_a_store);
715 static ssize_t group_traffic_class_b_show(struct device *dev,
716 struct device_attribute *attr,
719 struct idxd_group *group =
720 container_of(dev, struct idxd_group, conf_dev);
722 return sprintf(buf, "%d\n", group->tc_b);
725 static ssize_t group_traffic_class_b_store(struct device *dev,
726 struct device_attribute *attr,
727 const char *buf, size_t count)
729 struct idxd_group *group =
730 container_of(dev, struct idxd_group, conf_dev);
731 struct idxd_device *idxd = group->idxd;
735 rc = kstrtol(buf, 10, &val);
739 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
742 if (idxd->state == IDXD_DEV_ENABLED)
745 if (val < 0 || val > 7)
752 static struct device_attribute dev_attr_group_traffic_class_b =
753 __ATTR(traffic_class_b, 0644, group_traffic_class_b_show,
754 group_traffic_class_b_store);
756 static struct attribute *idxd_group_attributes[] = {
757 &dev_attr_group_work_queues.attr,
758 &dev_attr_group_engines.attr,
759 &dev_attr_group_use_token_limit.attr,
760 &dev_attr_group_tokens_allowed.attr,
761 &dev_attr_group_tokens_reserved.attr,
762 &dev_attr_group_traffic_class_a.attr,
763 &dev_attr_group_traffic_class_b.attr,
767 static const struct attribute_group idxd_group_attribute_group = {
768 .attrs = idxd_group_attributes,
771 static const struct attribute_group *idxd_group_attribute_groups[] = {
772 &idxd_group_attribute_group,
776 /* IDXD work queue attribs */
777 static ssize_t wq_clients_show(struct device *dev,
778 struct device_attribute *attr, char *buf)
780 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
782 return sprintf(buf, "%d\n", wq->client_count);
785 static struct device_attribute dev_attr_wq_clients =
786 __ATTR(clients, 0444, wq_clients_show, NULL);
788 static ssize_t wq_state_show(struct device *dev,
789 struct device_attribute *attr, char *buf)
791 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
794 case IDXD_WQ_DISABLED:
795 return sprintf(buf, "disabled\n");
796 case IDXD_WQ_ENABLED:
797 return sprintf(buf, "enabled\n");
800 return sprintf(buf, "unknown\n");
803 static struct device_attribute dev_attr_wq_state =
804 __ATTR(state, 0444, wq_state_show, NULL);
806 static ssize_t wq_group_id_show(struct device *dev,
807 struct device_attribute *attr, char *buf)
809 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
812 return sprintf(buf, "%u\n", wq->group->id);
814 return sprintf(buf, "-1\n");
817 static ssize_t wq_group_id_store(struct device *dev,
818 struct device_attribute *attr,
819 const char *buf, size_t count)
821 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
822 struct idxd_device *idxd = wq->idxd;
825 struct idxd_group *prevg, *group;
827 rc = kstrtol(buf, 10, &id);
831 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
834 if (wq->state != IDXD_WQ_DISABLED)
837 if (id > idxd->max_groups - 1 || id < -1)
842 wq->group->num_wqs--;
848 group = &idxd->groups[id];
858 static struct device_attribute dev_attr_wq_group_id =
859 __ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store);
861 static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr,
864 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
866 return sprintf(buf, "%s\n",
867 wq_dedicated(wq) ? "dedicated" : "shared");
870 static ssize_t wq_mode_store(struct device *dev,
871 struct device_attribute *attr, const char *buf,
874 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
875 struct idxd_device *idxd = wq->idxd;
877 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
880 if (wq->state != IDXD_WQ_DISABLED)
883 if (sysfs_streq(buf, "dedicated")) {
884 set_bit(WQ_FLAG_DEDICATED, &wq->flags);
893 static struct device_attribute dev_attr_wq_mode =
894 __ATTR(mode, 0644, wq_mode_show, wq_mode_store);
896 static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr,
899 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
901 return sprintf(buf, "%u\n", wq->size);
904 static ssize_t wq_size_store(struct device *dev,
905 struct device_attribute *attr, const char *buf,
908 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
910 struct idxd_device *idxd = wq->idxd;
913 rc = kstrtoul(buf, 10, &size);
917 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
920 if (wq->state != IDXD_WQ_DISABLED)
923 if (size > idxd->max_wq_size)
930 static struct device_attribute dev_attr_wq_size =
931 __ATTR(size, 0644, wq_size_show, wq_size_store);
933 static ssize_t wq_priority_show(struct device *dev,
934 struct device_attribute *attr, char *buf)
936 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
938 return sprintf(buf, "%u\n", wq->priority);
941 static ssize_t wq_priority_store(struct device *dev,
942 struct device_attribute *attr,
943 const char *buf, size_t count)
945 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
947 struct idxd_device *idxd = wq->idxd;
950 rc = kstrtoul(buf, 10, &prio);
954 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
957 if (wq->state != IDXD_WQ_DISABLED)
960 if (prio > IDXD_MAX_PRIORITY)
967 static struct device_attribute dev_attr_wq_priority =
968 __ATTR(priority, 0644, wq_priority_show, wq_priority_store);
970 static ssize_t wq_type_show(struct device *dev,
971 struct device_attribute *attr, char *buf)
973 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
976 case IDXD_WQT_KERNEL:
977 return sprintf(buf, "%s\n",
978 idxd_wq_type_names[IDXD_WQT_KERNEL]);
980 return sprintf(buf, "%s\n",
981 idxd_wq_type_names[IDXD_WQT_USER]);
984 return sprintf(buf, "%s\n",
985 idxd_wq_type_names[IDXD_WQT_NONE]);
991 static ssize_t wq_type_store(struct device *dev,
992 struct device_attribute *attr, const char *buf,
995 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
996 enum idxd_wq_type old_type;
998 if (wq->state != IDXD_WQ_DISABLED)
1001 old_type = wq->type;
1002 if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL]))
1003 wq->type = IDXD_WQT_KERNEL;
1004 else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER]))
1005 wq->type = IDXD_WQT_USER;
1007 wq->type = IDXD_WQT_NONE;
1009 /* If we are changing queue type, clear the name */
1010 if (wq->type != old_type)
1011 memset(wq->name, 0, WQ_NAME_SIZE + 1);
1016 static struct device_attribute dev_attr_wq_type =
1017 __ATTR(type, 0644, wq_type_show, wq_type_store);
1019 static ssize_t wq_name_show(struct device *dev,
1020 struct device_attribute *attr, char *buf)
1022 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
1024 return sprintf(buf, "%s\n", wq->name);
1027 static ssize_t wq_name_store(struct device *dev,
1028 struct device_attribute *attr, const char *buf,
1031 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
1033 if (wq->state != IDXD_WQ_DISABLED)
1036 if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0)
1039 memset(wq->name, 0, WQ_NAME_SIZE + 1);
1040 strncpy(wq->name, buf, WQ_NAME_SIZE);
1041 strreplace(wq->name, '\n', '\0');
1045 static struct device_attribute dev_attr_wq_name =
1046 __ATTR(name, 0644, wq_name_show, wq_name_store);
1048 static ssize_t wq_cdev_minor_show(struct device *dev,
1049 struct device_attribute *attr, char *buf)
1051 struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev);
1053 return sprintf(buf, "%d\n", wq->idxd_cdev.minor);
1056 static struct device_attribute dev_attr_wq_cdev_minor =
1057 __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL);
1059 static struct attribute *idxd_wq_attributes[] = {
1060 &dev_attr_wq_clients.attr,
1061 &dev_attr_wq_state.attr,
1062 &dev_attr_wq_group_id.attr,
1063 &dev_attr_wq_mode.attr,
1064 &dev_attr_wq_size.attr,
1065 &dev_attr_wq_priority.attr,
1066 &dev_attr_wq_type.attr,
1067 &dev_attr_wq_name.attr,
1068 &dev_attr_wq_cdev_minor.attr,
1072 static const struct attribute_group idxd_wq_attribute_group = {
1073 .attrs = idxd_wq_attributes,
1076 static const struct attribute_group *idxd_wq_attribute_groups[] = {
1077 &idxd_wq_attribute_group,
1081 /* IDXD device attribs */
1082 static ssize_t max_work_queues_size_show(struct device *dev,
1083 struct device_attribute *attr,
1086 struct idxd_device *idxd =
1087 container_of(dev, struct idxd_device, conf_dev);
1089 return sprintf(buf, "%u\n", idxd->max_wq_size);
1091 static DEVICE_ATTR_RO(max_work_queues_size);
1093 static ssize_t max_groups_show(struct device *dev,
1094 struct device_attribute *attr, char *buf)
1096 struct idxd_device *idxd =
1097 container_of(dev, struct idxd_device, conf_dev);
1099 return sprintf(buf, "%u\n", idxd->max_groups);
1101 static DEVICE_ATTR_RO(max_groups);
1103 static ssize_t max_work_queues_show(struct device *dev,
1104 struct device_attribute *attr, char *buf)
1106 struct idxd_device *idxd =
1107 container_of(dev, struct idxd_device, conf_dev);
1109 return sprintf(buf, "%u\n", idxd->max_wqs);
1111 static DEVICE_ATTR_RO(max_work_queues);
1113 static ssize_t max_engines_show(struct device *dev,
1114 struct device_attribute *attr, char *buf)
1116 struct idxd_device *idxd =
1117 container_of(dev, struct idxd_device, conf_dev);
1119 return sprintf(buf, "%u\n", idxd->max_engines);
1121 static DEVICE_ATTR_RO(max_engines);
1123 static ssize_t numa_node_show(struct device *dev,
1124 struct device_attribute *attr, char *buf)
1126 struct idxd_device *idxd =
1127 container_of(dev, struct idxd_device, conf_dev);
1129 return sprintf(buf, "%d\n", dev_to_node(&idxd->pdev->dev));
1131 static DEVICE_ATTR_RO(numa_node);
1133 static ssize_t max_batch_size_show(struct device *dev,
1134 struct device_attribute *attr, char *buf)
1136 struct idxd_device *idxd =
1137 container_of(dev, struct idxd_device, conf_dev);
1139 return sprintf(buf, "%u\n", idxd->max_batch_size);
1141 static DEVICE_ATTR_RO(max_batch_size);
1143 static ssize_t max_transfer_size_show(struct device *dev,
1144 struct device_attribute *attr,
1147 struct idxd_device *idxd =
1148 container_of(dev, struct idxd_device, conf_dev);
1150 return sprintf(buf, "%llu\n", idxd->max_xfer_bytes);
1152 static DEVICE_ATTR_RO(max_transfer_size);
1154 static ssize_t op_cap_show(struct device *dev,
1155 struct device_attribute *attr, char *buf)
1157 struct idxd_device *idxd =
1158 container_of(dev, struct idxd_device, conf_dev);
1160 return sprintf(buf, "%#llx\n", idxd->hw.opcap.bits[0]);
1162 static DEVICE_ATTR_RO(op_cap);
1164 static ssize_t configurable_show(struct device *dev,
1165 struct device_attribute *attr, char *buf)
1167 struct idxd_device *idxd =
1168 container_of(dev, struct idxd_device, conf_dev);
1170 return sprintf(buf, "%u\n",
1171 test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags));
1173 static DEVICE_ATTR_RO(configurable);
1175 static ssize_t clients_show(struct device *dev,
1176 struct device_attribute *attr, char *buf)
1178 struct idxd_device *idxd =
1179 container_of(dev, struct idxd_device, conf_dev);
1180 unsigned long flags;
1183 spin_lock_irqsave(&idxd->dev_lock, flags);
1184 for (i = 0; i < idxd->max_wqs; i++) {
1185 struct idxd_wq *wq = &idxd->wqs[i];
1187 count += wq->client_count;
1189 spin_unlock_irqrestore(&idxd->dev_lock, flags);
1191 return sprintf(buf, "%d\n", count);
1193 static DEVICE_ATTR_RO(clients);
1195 static ssize_t state_show(struct device *dev,
1196 struct device_attribute *attr, char *buf)
1198 struct idxd_device *idxd =
1199 container_of(dev, struct idxd_device, conf_dev);
1201 switch (idxd->state) {
1202 case IDXD_DEV_DISABLED:
1203 case IDXD_DEV_CONF_READY:
1204 return sprintf(buf, "disabled\n");
1205 case IDXD_DEV_ENABLED:
1206 return sprintf(buf, "enabled\n");
1207 case IDXD_DEV_HALTED:
1208 return sprintf(buf, "halted\n");
1211 return sprintf(buf, "unknown\n");
1213 static DEVICE_ATTR_RO(state);
1215 static ssize_t errors_show(struct device *dev,
1216 struct device_attribute *attr, char *buf)
1218 struct idxd_device *idxd =
1219 container_of(dev, struct idxd_device, conf_dev);
1221 unsigned long flags;
1223 spin_lock_irqsave(&idxd->dev_lock, flags);
1224 for (i = 0; i < 4; i++)
1225 out += sprintf(buf + out, "%#018llx ", idxd->sw_err.bits[i]);
1226 spin_unlock_irqrestore(&idxd->dev_lock, flags);
1228 out += sprintf(buf + out, "\n");
1231 static DEVICE_ATTR_RO(errors);
1233 static ssize_t max_tokens_show(struct device *dev,
1234 struct device_attribute *attr, char *buf)
1236 struct idxd_device *idxd =
1237 container_of(dev, struct idxd_device, conf_dev);
1239 return sprintf(buf, "%u\n", idxd->max_tokens);
1241 static DEVICE_ATTR_RO(max_tokens);
1243 static ssize_t token_limit_show(struct device *dev,
1244 struct device_attribute *attr, char *buf)
1246 struct idxd_device *idxd =
1247 container_of(dev, struct idxd_device, conf_dev);
1249 return sprintf(buf, "%u\n", idxd->token_limit);
1252 static ssize_t token_limit_store(struct device *dev,
1253 struct device_attribute *attr,
1254 const char *buf, size_t count)
1256 struct idxd_device *idxd =
1257 container_of(dev, struct idxd_device, conf_dev);
1261 rc = kstrtoul(buf, 10, &val);
1265 if (idxd->state == IDXD_DEV_ENABLED)
1268 if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
1271 if (!idxd->hw.group_cap.token_limit)
1274 if (val > idxd->hw.group_cap.total_tokens)
1277 idxd->token_limit = val;
1280 static DEVICE_ATTR_RW(token_limit);
1282 static ssize_t cdev_major_show(struct device *dev,
1283 struct device_attribute *attr, char *buf)
1285 struct idxd_device *idxd =
1286 container_of(dev, struct idxd_device, conf_dev);
1288 return sprintf(buf, "%u\n", idxd->major);
1290 static DEVICE_ATTR_RO(cdev_major);
1292 static struct attribute *idxd_device_attributes[] = {
1293 &dev_attr_max_groups.attr,
1294 &dev_attr_max_work_queues.attr,
1295 &dev_attr_max_work_queues_size.attr,
1296 &dev_attr_max_engines.attr,
1297 &dev_attr_numa_node.attr,
1298 &dev_attr_max_batch_size.attr,
1299 &dev_attr_max_transfer_size.attr,
1300 &dev_attr_op_cap.attr,
1301 &dev_attr_configurable.attr,
1302 &dev_attr_clients.attr,
1303 &dev_attr_state.attr,
1304 &dev_attr_errors.attr,
1305 &dev_attr_max_tokens.attr,
1306 &dev_attr_token_limit.attr,
1307 &dev_attr_cdev_major.attr,
1311 static const struct attribute_group idxd_device_attribute_group = {
1312 .attrs = idxd_device_attributes,
1315 static const struct attribute_group *idxd_attribute_groups[] = {
1316 &idxd_device_attribute_group,
1320 static int idxd_setup_engine_sysfs(struct idxd_device *idxd)
1322 struct device *dev = &idxd->pdev->dev;
1325 for (i = 0; i < idxd->max_engines; i++) {
1326 struct idxd_engine *engine = &idxd->engines[i];
1328 engine->conf_dev.parent = &idxd->conf_dev;
1329 dev_set_name(&engine->conf_dev, "engine%d.%d",
1330 idxd->id, engine->id);
1331 engine->conf_dev.bus = idxd_get_bus_type(idxd);
1332 engine->conf_dev.groups = idxd_engine_attribute_groups;
1333 engine->conf_dev.type = &idxd_engine_device_type;
1334 dev_dbg(dev, "Engine device register: %s\n",
1335 dev_name(&engine->conf_dev));
1336 rc = device_register(&engine->conf_dev);
1338 put_device(&engine->conf_dev);
1347 struct idxd_engine *engine = &idxd->engines[i];
1349 device_unregister(&engine->conf_dev);
1354 static int idxd_setup_group_sysfs(struct idxd_device *idxd)
1356 struct device *dev = &idxd->pdev->dev;
1359 for (i = 0; i < idxd->max_groups; i++) {
1360 struct idxd_group *group = &idxd->groups[i];
1362 group->conf_dev.parent = &idxd->conf_dev;
1363 dev_set_name(&group->conf_dev, "group%d.%d",
1364 idxd->id, group->id);
1365 group->conf_dev.bus = idxd_get_bus_type(idxd);
1366 group->conf_dev.groups = idxd_group_attribute_groups;
1367 group->conf_dev.type = &idxd_group_device_type;
1368 dev_dbg(dev, "Group device register: %s\n",
1369 dev_name(&group->conf_dev));
1370 rc = device_register(&group->conf_dev);
1372 put_device(&group->conf_dev);
1381 struct idxd_group *group = &idxd->groups[i];
1383 device_unregister(&group->conf_dev);
1388 static int idxd_setup_wq_sysfs(struct idxd_device *idxd)
1390 struct device *dev = &idxd->pdev->dev;
1393 for (i = 0; i < idxd->max_wqs; i++) {
1394 struct idxd_wq *wq = &idxd->wqs[i];
1396 wq->conf_dev.parent = &idxd->conf_dev;
1397 dev_set_name(&wq->conf_dev, "wq%d.%d", idxd->id, wq->id);
1398 wq->conf_dev.bus = idxd_get_bus_type(idxd);
1399 wq->conf_dev.groups = idxd_wq_attribute_groups;
1400 wq->conf_dev.type = &idxd_wq_device_type;
1401 dev_dbg(dev, "WQ device register: %s\n",
1402 dev_name(&wq->conf_dev));
1403 rc = device_register(&wq->conf_dev);
1405 put_device(&wq->conf_dev);
1414 struct idxd_wq *wq = &idxd->wqs[i];
1416 device_unregister(&wq->conf_dev);
1421 static int idxd_setup_device_sysfs(struct idxd_device *idxd)
1423 struct device *dev = &idxd->pdev->dev;
1425 char devname[IDXD_NAME_SIZE];
1427 sprintf(devname, "%s%d", idxd_get_dev_name(idxd), idxd->id);
1428 idxd->conf_dev.parent = dev;
1429 dev_set_name(&idxd->conf_dev, "%s", devname);
1430 idxd->conf_dev.bus = idxd_get_bus_type(idxd);
1431 idxd->conf_dev.groups = idxd_attribute_groups;
1432 idxd->conf_dev.type = idxd_get_device_type(idxd);
1434 dev_dbg(dev, "IDXD device register: %s\n", dev_name(&idxd->conf_dev));
1435 rc = device_register(&idxd->conf_dev);
1437 put_device(&idxd->conf_dev);
1444 int idxd_setup_sysfs(struct idxd_device *idxd)
1446 struct device *dev = &idxd->pdev->dev;
1449 rc = idxd_setup_device_sysfs(idxd);
1451 dev_dbg(dev, "Device sysfs registering failed: %d\n", rc);
1455 rc = idxd_setup_wq_sysfs(idxd);
1457 /* unregister conf dev */
1458 dev_dbg(dev, "Work Queue sysfs registering failed: %d\n", rc);
1462 rc = idxd_setup_group_sysfs(idxd);
1464 /* unregister conf dev */
1465 dev_dbg(dev, "Group sysfs registering failed: %d\n", rc);
1469 rc = idxd_setup_engine_sysfs(idxd);
1471 /* unregister conf dev */
1472 dev_dbg(dev, "Engine sysfs registering failed: %d\n", rc);
1479 void idxd_cleanup_sysfs(struct idxd_device *idxd)
1483 for (i = 0; i < idxd->max_wqs; i++) {
1484 struct idxd_wq *wq = &idxd->wqs[i];
1486 device_unregister(&wq->conf_dev);
1489 for (i = 0; i < idxd->max_engines; i++) {
1490 struct idxd_engine *engine = &idxd->engines[i];
1492 device_unregister(&engine->conf_dev);
1495 for (i = 0; i < idxd->max_groups; i++) {
1496 struct idxd_group *group = &idxd->groups[i];
1498 device_unregister(&group->conf_dev);
1501 device_unregister(&idxd->conf_dev);
1504 int idxd_register_bus_type(void)
1508 for (i = 0; i < IDXD_TYPE_MAX; i++) {
1509 rc = bus_register(idxd_bus_types[i]);
1518 bus_unregister(idxd_bus_types[i]);
1522 void idxd_unregister_bus_type(void)
1526 for (i = 0; i < IDXD_TYPE_MAX; i++)
1527 bus_unregister(idxd_bus_types[i]);