| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright(c) 2019 Intel Corporation. All rights rsvd. */ |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/device.h> |
| #include <linux/io-64-nonatomic-lo-hi.h> |
| #include <uapi/linux/idxd.h> |
| #include "registers.h" |
| #include "idxd.h" |
| |
| static char *idxd_wq_type_names[] = { |
| [IDXD_WQT_NONE] = "none", |
| [IDXD_WQT_KERNEL] = "kernel", |
| [IDXD_WQT_USER] = "user", |
| }; |
| |
| static int idxd_config_bus_match(struct device *dev, |
| struct device_driver *drv) |
| { |
| int matched = 0; |
| |
| if (is_idxd_dev(dev)) { |
| struct idxd_device *idxd = confdev_to_idxd(dev); |
| |
| if (idxd->state != IDXD_DEV_CONF_READY) |
| return 0; |
| matched = 1; |
| } else if (is_idxd_wq_dev(dev)) { |
| struct idxd_wq *wq = confdev_to_wq(dev); |
| struct idxd_device *idxd = wq->idxd; |
| |
| if (idxd->state < IDXD_DEV_CONF_READY) |
| return 0; |
| |
| if (wq->state != IDXD_WQ_DISABLED) { |
| dev_dbg(dev, "%s not disabled\n", dev_name(dev)); |
| return 0; |
| } |
| matched = 1; |
| } |
| |
| if (matched) |
| dev_dbg(dev, "%s matched\n", dev_name(dev)); |
| |
| return matched; |
| } |
| |
| static int enable_wq(struct idxd_wq *wq) |
| { |
| struct idxd_device *idxd = wq->idxd; |
| struct device *dev = &idxd->pdev->dev; |
| unsigned long flags; |
| int rc; |
| |
| mutex_lock(&wq->wq_lock); |
| |
| if (idxd->state != IDXD_DEV_ENABLED) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "Enabling while device not enabled.\n"); |
| return -EPERM; |
| } |
| |
| if (wq->state != IDXD_WQ_DISABLED) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "WQ %d already enabled.\n", wq->id); |
| return -EBUSY; |
| } |
| |
| if (!wq->group) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "WQ not attached to group.\n"); |
| return -EINVAL; |
| } |
| |
| if (strlen(wq->name) == 0) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "WQ name not set.\n"); |
| return -EINVAL; |
| } |
| |
| /* Shared WQ checks */ |
| if (wq_shared(wq)) { |
| if (!device_swq_supported(idxd)) { |
| dev_warn(dev, "PASID not enabled and shared WQ.\n"); |
| mutex_unlock(&wq->wq_lock); |
| return -ENXIO; |
| } |
| /* |
| * Shared wq with the threshold set to 0 means the user |
| * did not set the threshold or transitioned from a |
| * dedicated wq but did not set threshold. A value |
| * of 0 would effectively disable the shared wq. The |
| * driver does not allow a value of 0 to be set for |
| * threshold via sysfs. |
| */ |
| if (wq->threshold == 0) { |
| dev_warn(dev, "Shared WQ and threshold 0.\n"); |
| mutex_unlock(&wq->wq_lock); |
| return -EINVAL; |
| } |
| } |
| |
| rc = idxd_wq_alloc_resources(wq); |
| if (rc < 0) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "WQ resource alloc failed\n"); |
| return rc; |
| } |
| |
| spin_lock_irqsave(&idxd->dev_lock, flags); |
| if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| rc = idxd_device_config(idxd); |
| spin_unlock_irqrestore(&idxd->dev_lock, flags); |
| if (rc < 0) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "Writing WQ %d config failed: %d\n", wq->id, rc); |
| return rc; |
| } |
| |
| rc = idxd_wq_enable(wq); |
| if (rc < 0) { |
| mutex_unlock(&wq->wq_lock); |
| dev_warn(dev, "WQ %d enabling failed: %d\n", wq->id, rc); |
| return rc; |
| } |
| |
| rc = idxd_wq_map_portal(wq); |
| if (rc < 0) { |
| dev_warn(dev, "wq portal mapping failed: %d\n", rc); |
| rc = idxd_wq_disable(wq); |
| if (rc < 0) |
| dev_warn(dev, "IDXD wq disable failed\n"); |
| mutex_unlock(&wq->wq_lock); |
| return rc; |
| } |
| |
| wq->client_count = 0; |
| |
| if (wq->type == IDXD_WQT_KERNEL) { |
| rc = idxd_wq_init_percpu_ref(wq); |
| if (rc < 0) { |
| dev_dbg(dev, "percpu_ref setup failed\n"); |
| mutex_unlock(&wq->wq_lock); |
| return rc; |
| } |
| } |
| |
| if (is_idxd_wq_dmaengine(wq)) { |
| rc = idxd_register_dma_channel(wq); |
| if (rc < 0) { |
| dev_dbg(dev, "DMA channel register failed\n"); |
| mutex_unlock(&wq->wq_lock); |
| return rc; |
| } |
| } else if (is_idxd_wq_cdev(wq)) { |
| rc = idxd_wq_add_cdev(wq); |
| if (rc < 0) { |
| dev_dbg(dev, "Cdev creation failed\n"); |
| mutex_unlock(&wq->wq_lock); |
| return rc; |
| } |
| } |
| |
| mutex_unlock(&wq->wq_lock); |
| dev_info(dev, "wq %s enabled\n", dev_name(&wq->conf_dev)); |
| |
| return 0; |
| } |
| |
| static int idxd_config_bus_probe(struct device *dev) |
| { |
| int rc = 0; |
| unsigned long flags; |
| |
| dev_dbg(dev, "%s called\n", __func__); |
| |
| if (is_idxd_dev(dev)) { |
| struct idxd_device *idxd = confdev_to_idxd(dev); |
| |
| if (idxd->state != IDXD_DEV_CONF_READY) { |
| dev_warn(dev, "Device not ready for config\n"); |
| return -EBUSY; |
| } |
| |
| if (!try_module_get(THIS_MODULE)) |
| return -ENXIO; |
| |
| /* Perform IDXD configuration and enabling */ |
| spin_lock_irqsave(&idxd->dev_lock, flags); |
| if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| rc = idxd_device_config(idxd); |
| spin_unlock_irqrestore(&idxd->dev_lock, flags); |
| if (rc < 0) { |
| module_put(THIS_MODULE); |
| dev_warn(dev, "Device config failed: %d\n", rc); |
| return rc; |
| } |
| |
| /* start device */ |
| rc = idxd_device_enable(idxd); |
| if (rc < 0) { |
| module_put(THIS_MODULE); |
| dev_warn(dev, "Device enable failed: %d\n", rc); |
| return rc; |
| } |
| |
| dev_info(dev, "Device %s enabled\n", dev_name(dev)); |
| |
| rc = idxd_register_dma_device(idxd); |
| if (rc < 0) { |
| module_put(THIS_MODULE); |
| dev_dbg(dev, "Failed to register dmaengine device\n"); |
| return rc; |
| } |
| return 0; |
| } else if (is_idxd_wq_dev(dev)) { |
| struct idxd_wq *wq = confdev_to_wq(dev); |
| |
| return enable_wq(wq); |
| } |
| |
| return -ENODEV; |
| } |
| |
| static void disable_wq(struct idxd_wq *wq) |
| { |
| struct idxd_device *idxd = wq->idxd; |
| struct device *dev = &idxd->pdev->dev; |
| |
| mutex_lock(&wq->wq_lock); |
| dev_dbg(dev, "%s removing WQ %s\n", __func__, dev_name(&wq->conf_dev)); |
| if (wq->state == IDXD_WQ_DISABLED) { |
| mutex_unlock(&wq->wq_lock); |
| return; |
| } |
| |
| if (wq->type == IDXD_WQT_KERNEL) |
| idxd_wq_quiesce(wq); |
| |
| if (is_idxd_wq_dmaengine(wq)) |
| idxd_unregister_dma_channel(wq); |
| else if (is_idxd_wq_cdev(wq)) |
| idxd_wq_del_cdev(wq); |
| |
| if (idxd_wq_refcount(wq)) |
| dev_warn(dev, "Clients has claim on wq %d: %d\n", |
| wq->id, idxd_wq_refcount(wq)); |
| |
| idxd_wq_unmap_portal(wq); |
| |
| idxd_wq_drain(wq); |
| idxd_wq_reset(wq); |
| |
| idxd_wq_free_resources(wq); |
| wq->client_count = 0; |
| mutex_unlock(&wq->wq_lock); |
| |
| dev_info(dev, "wq %s disabled\n", dev_name(&wq->conf_dev)); |
| } |
| |
| static int idxd_config_bus_remove(struct device *dev) |
| { |
| int rc; |
| |
| dev_dbg(dev, "%s called for %s\n", __func__, dev_name(dev)); |
| |
| /* disable workqueue here */ |
| if (is_idxd_wq_dev(dev)) { |
| struct idxd_wq *wq = confdev_to_wq(dev); |
| |
| disable_wq(wq); |
| } else if (is_idxd_dev(dev)) { |
| struct idxd_device *idxd = confdev_to_idxd(dev); |
| int i; |
| |
| dev_dbg(dev, "%s removing dev %s\n", __func__, |
| dev_name(&idxd->conf_dev)); |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| if (wq->state == IDXD_WQ_DISABLED) |
| continue; |
| dev_warn(dev, "Active wq %d on disable %s.\n", i, |
| dev_name(&idxd->conf_dev)); |
| device_release_driver(&wq->conf_dev); |
| } |
| |
| idxd_unregister_dma_device(idxd); |
| rc = idxd_device_disable(idxd); |
| if (test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) { |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| mutex_lock(&wq->wq_lock); |
| idxd_wq_disable_cleanup(wq); |
| mutex_unlock(&wq->wq_lock); |
| } |
| } |
| module_put(THIS_MODULE); |
| if (rc < 0) |
| dev_warn(dev, "Device disable failed\n"); |
| else |
| dev_info(dev, "Device %s disabled\n", dev_name(dev)); |
| |
| } |
| |
| return 0; |
| } |
| |
| static void idxd_config_bus_shutdown(struct device *dev) |
| { |
| dev_dbg(dev, "%s called\n", __func__); |
| } |
| |
| struct bus_type dsa_bus_type = { |
| .name = "dsa", |
| .match = idxd_config_bus_match, |
| .probe = idxd_config_bus_probe, |
| .remove = idxd_config_bus_remove, |
| .shutdown = idxd_config_bus_shutdown, |
| }; |
| |
| static struct idxd_device_driver dsa_drv = { |
| .drv = { |
| .name = "dsa", |
| .bus = &dsa_bus_type, |
| .owner = THIS_MODULE, |
| .mod_name = KBUILD_MODNAME, |
| }, |
| }; |
| |
| /* IDXD generic driver setup */ |
| int idxd_register_driver(void) |
| { |
| return driver_register(&dsa_drv.drv); |
| } |
| |
| void idxd_unregister_driver(void) |
| { |
| driver_unregister(&dsa_drv.drv); |
| } |
| |
| /* IDXD engine attributes */ |
| static ssize_t engine_group_id_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_engine *engine = |
| container_of(dev, struct idxd_engine, conf_dev); |
| |
| if (engine->group) |
| return sysfs_emit(buf, "%d\n", engine->group->id); |
| else |
| return sysfs_emit(buf, "%d\n", -1); |
| } |
| |
| static ssize_t engine_group_id_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_engine *engine = |
| container_of(dev, struct idxd_engine, conf_dev); |
| struct idxd_device *idxd = engine->idxd; |
| long id; |
| int rc; |
| struct idxd_group *prevg; |
| |
| rc = kstrtol(buf, 10, &id); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (id > idxd->max_groups - 1 || id < -1) |
| return -EINVAL; |
| |
| if (id == -1) { |
| if (engine->group) { |
| engine->group->num_engines--; |
| engine->group = NULL; |
| } |
| return count; |
| } |
| |
| prevg = engine->group; |
| |
| if (prevg) |
| prevg->num_engines--; |
| engine->group = idxd->groups[id]; |
| engine->group->num_engines++; |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_engine_group = |
| __ATTR(group_id, 0644, engine_group_id_show, |
| engine_group_id_store); |
| |
| static struct attribute *idxd_engine_attributes[] = { |
| &dev_attr_engine_group.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group idxd_engine_attribute_group = { |
| .attrs = idxd_engine_attributes, |
| }; |
| |
| static const struct attribute_group *idxd_engine_attribute_groups[] = { |
| &idxd_engine_attribute_group, |
| NULL, |
| }; |
| |
| static void idxd_conf_engine_release(struct device *dev) |
| { |
| struct idxd_engine *engine = container_of(dev, struct idxd_engine, conf_dev); |
| |
| kfree(engine); |
| } |
| |
| struct device_type idxd_engine_device_type = { |
| .name = "engine", |
| .release = idxd_conf_engine_release, |
| .groups = idxd_engine_attribute_groups, |
| }; |
| |
| /* Group attributes */ |
| |
| static void idxd_set_free_tokens(struct idxd_device *idxd) |
| { |
| int i, tokens; |
| |
| for (i = 0, tokens = 0; i < idxd->max_groups; i++) { |
| struct idxd_group *g = idxd->groups[i]; |
| |
| tokens += g->tokens_reserved; |
| } |
| |
| idxd->nr_tokens = idxd->max_tokens - tokens; |
| } |
| |
| static ssize_t group_tokens_reserved_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", group->tokens_reserved); |
| } |
| |
| static ssize_t group_tokens_reserved_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| struct idxd_device *idxd = group->idxd; |
| unsigned long val; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (idxd->data->type == IDXD_TYPE_IAX) |
| return -EOPNOTSUPP; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (val > idxd->max_tokens) |
| return -EINVAL; |
| |
| if (val > idxd->nr_tokens + group->tokens_reserved) |
| return -EINVAL; |
| |
| group->tokens_reserved = val; |
| idxd_set_free_tokens(idxd); |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_group_tokens_reserved = |
| __ATTR(tokens_reserved, 0644, group_tokens_reserved_show, |
| group_tokens_reserved_store); |
| |
| static ssize_t group_tokens_allowed_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", group->tokens_allowed); |
| } |
| |
| static ssize_t group_tokens_allowed_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| struct idxd_device *idxd = group->idxd; |
| unsigned long val; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (idxd->data->type == IDXD_TYPE_IAX) |
| return -EOPNOTSUPP; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (val < 4 * group->num_engines || |
| val > group->tokens_reserved + idxd->nr_tokens) |
| return -EINVAL; |
| |
| group->tokens_allowed = val; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_group_tokens_allowed = |
| __ATTR(tokens_allowed, 0644, group_tokens_allowed_show, |
| group_tokens_allowed_store); |
| |
| static ssize_t group_use_token_limit_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", group->use_token_limit); |
| } |
| |
| static ssize_t group_use_token_limit_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| struct idxd_device *idxd = group->idxd; |
| unsigned long val; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (idxd->data->type == IDXD_TYPE_IAX) |
| return -EOPNOTSUPP; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (idxd->token_limit == 0) |
| return -EPERM; |
| |
| group->use_token_limit = !!val; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_group_use_token_limit = |
| __ATTR(use_token_limit, 0644, group_use_token_limit_show, |
| group_use_token_limit_store); |
| |
| static ssize_t group_engines_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| int i, rc = 0; |
| struct idxd_device *idxd = group->idxd; |
| |
| for (i = 0; i < idxd->max_engines; i++) { |
| struct idxd_engine *engine = idxd->engines[i]; |
| |
| if (!engine->group) |
| continue; |
| |
| if (engine->group->id == group->id) |
| rc += sysfs_emit_at(buf, rc, "engine%d.%d ", idxd->id, engine->id); |
| } |
| |
| if (!rc) |
| return 0; |
| rc--; |
| rc += sysfs_emit_at(buf, rc, "\n"); |
| |
| return rc; |
| } |
| |
| static struct device_attribute dev_attr_group_engines = |
| __ATTR(engines, 0444, group_engines_show, NULL); |
| |
| static ssize_t group_work_queues_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| int i, rc = 0; |
| struct idxd_device *idxd = group->idxd; |
| |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| if (!wq->group) |
| continue; |
| |
| if (wq->group->id == group->id) |
| rc += sysfs_emit_at(buf, rc, "wq%d.%d ", idxd->id, wq->id); |
| } |
| |
| if (!rc) |
| return 0; |
| rc--; |
| rc += sysfs_emit_at(buf, rc, "\n"); |
| |
| return rc; |
| } |
| |
| static struct device_attribute dev_attr_group_work_queues = |
| __ATTR(work_queues, 0444, group_work_queues_show, NULL); |
| |
| static ssize_t group_traffic_class_a_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| |
| return sysfs_emit(buf, "%d\n", group->tc_a); |
| } |
| |
| static ssize_t group_traffic_class_a_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| struct idxd_device *idxd = group->idxd; |
| long val; |
| int rc; |
| |
| rc = kstrtol(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (val < 0 || val > 7) |
| return -EINVAL; |
| |
| group->tc_a = val; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_group_traffic_class_a = |
| __ATTR(traffic_class_a, 0644, group_traffic_class_a_show, |
| group_traffic_class_a_store); |
| |
| static ssize_t group_traffic_class_b_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| |
| return sysfs_emit(buf, "%d\n", group->tc_b); |
| } |
| |
| static ssize_t group_traffic_class_b_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_group *group = |
| container_of(dev, struct idxd_group, conf_dev); |
| struct idxd_device *idxd = group->idxd; |
| long val; |
| int rc; |
| |
| rc = kstrtol(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (val < 0 || val > 7) |
| return -EINVAL; |
| |
| group->tc_b = val; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_group_traffic_class_b = |
| __ATTR(traffic_class_b, 0644, group_traffic_class_b_show, |
| group_traffic_class_b_store); |
| |
| static struct attribute *idxd_group_attributes[] = { |
| &dev_attr_group_work_queues.attr, |
| &dev_attr_group_engines.attr, |
| &dev_attr_group_use_token_limit.attr, |
| &dev_attr_group_tokens_allowed.attr, |
| &dev_attr_group_tokens_reserved.attr, |
| &dev_attr_group_traffic_class_a.attr, |
| &dev_attr_group_traffic_class_b.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group idxd_group_attribute_group = { |
| .attrs = idxd_group_attributes, |
| }; |
| |
| static const struct attribute_group *idxd_group_attribute_groups[] = { |
| &idxd_group_attribute_group, |
| NULL, |
| }; |
| |
| static void idxd_conf_group_release(struct device *dev) |
| { |
| struct idxd_group *group = container_of(dev, struct idxd_group, conf_dev); |
| |
| kfree(group); |
| } |
| |
| struct device_type idxd_group_device_type = { |
| .name = "group", |
| .release = idxd_conf_group_release, |
| .groups = idxd_group_attribute_groups, |
| }; |
| |
| /* IDXD work queue attribs */ |
| static ssize_t wq_clients_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%d\n", wq->client_count); |
| } |
| |
| static struct device_attribute dev_attr_wq_clients = |
| __ATTR(clients, 0444, wq_clients_show, NULL); |
| |
| static ssize_t wq_state_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| switch (wq->state) { |
| case IDXD_WQ_DISABLED: |
| return sysfs_emit(buf, "disabled\n"); |
| case IDXD_WQ_ENABLED: |
| return sysfs_emit(buf, "enabled\n"); |
| } |
| |
| return sysfs_emit(buf, "unknown\n"); |
| } |
| |
| static struct device_attribute dev_attr_wq_state = |
| __ATTR(state, 0444, wq_state_show, NULL); |
| |
| static ssize_t wq_group_id_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| if (wq->group) |
| return sysfs_emit(buf, "%u\n", wq->group->id); |
| else |
| return sysfs_emit(buf, "-1\n"); |
| } |
| |
| static ssize_t wq_group_id_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| long id; |
| int rc; |
| struct idxd_group *prevg, *group; |
| |
| rc = kstrtol(buf, 10, &id); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| if (id > idxd->max_groups - 1 || id < -1) |
| return -EINVAL; |
| |
| if (id == -1) { |
| if (wq->group) { |
| wq->group->num_wqs--; |
| wq->group = NULL; |
| } |
| return count; |
| } |
| |
| group = idxd->groups[id]; |
| prevg = wq->group; |
| |
| if (prevg) |
| prevg->num_wqs--; |
| wq->group = group; |
| group->num_wqs++; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_group_id = |
| __ATTR(group_id, 0644, wq_group_id_show, wq_group_id_store); |
| |
| static ssize_t wq_mode_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%s\n", wq_dedicated(wq) ? "dedicated" : "shared"); |
| } |
| |
| static ssize_t wq_mode_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| if (sysfs_streq(buf, "dedicated")) { |
| set_bit(WQ_FLAG_DEDICATED, &wq->flags); |
| wq->threshold = 0; |
| } else if (sysfs_streq(buf, "shared") && device_swq_supported(idxd)) { |
| clear_bit(WQ_FLAG_DEDICATED, &wq->flags); |
| } else { |
| return -EINVAL; |
| } |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_mode = |
| __ATTR(mode, 0644, wq_mode_show, wq_mode_store); |
| |
| static ssize_t wq_size_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", wq->size); |
| } |
| |
| static int total_claimed_wq_size(struct idxd_device *idxd) |
| { |
| int i; |
| int wq_size = 0; |
| |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| wq_size += wq->size; |
| } |
| |
| return wq_size; |
| } |
| |
| static ssize_t wq_size_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| unsigned long size; |
| struct idxd_device *idxd = wq->idxd; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &size); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (size + total_claimed_wq_size(idxd) - wq->size > idxd->max_wq_size) |
| return -EINVAL; |
| |
| wq->size = size; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_size = |
| __ATTR(size, 0644, wq_size_show, wq_size_store); |
| |
| static ssize_t wq_priority_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", wq->priority); |
| } |
| |
| static ssize_t wq_priority_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| unsigned long prio; |
| struct idxd_device *idxd = wq->idxd; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &prio); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| if (prio > IDXD_MAX_PRIORITY) |
| return -EINVAL; |
| |
| wq->priority = prio; |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_priority = |
| __ATTR(priority, 0644, wq_priority_show, wq_priority_store); |
| |
| static ssize_t wq_block_on_fault_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", test_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags)); |
| } |
| |
| static ssize_t wq_block_on_fault_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| bool bof; |
| int rc; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -ENXIO; |
| |
| rc = kstrtobool(buf, &bof); |
| if (rc < 0) |
| return rc; |
| |
| if (bof) |
| set_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); |
| else |
| clear_bit(WQ_FLAG_BLOCK_ON_FAULT, &wq->flags); |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_block_on_fault = |
| __ATTR(block_on_fault, 0644, wq_block_on_fault_show, |
| wq_block_on_fault_store); |
| |
| static ssize_t wq_threshold_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", wq->threshold); |
| } |
| |
| static ssize_t wq_threshold_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| unsigned int val; |
| int rc; |
| |
| rc = kstrtouint(buf, 0, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (val > wq->size || val <= 0) |
| return -EINVAL; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -ENXIO; |
| |
| if (test_bit(WQ_FLAG_DEDICATED, &wq->flags)) |
| return -EINVAL; |
| |
| wq->threshold = val; |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_threshold = |
| __ATTR(threshold, 0644, wq_threshold_show, wq_threshold_store); |
| |
| static ssize_t wq_type_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| switch (wq->type) { |
| case IDXD_WQT_KERNEL: |
| return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_KERNEL]); |
| case IDXD_WQT_USER: |
| return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]); |
| case IDXD_WQT_NONE: |
| default: |
| return sysfs_emit(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_NONE]); |
| } |
| |
| return -EINVAL; |
| } |
| |
| static ssize_t wq_type_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| enum idxd_wq_type old_type; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| old_type = wq->type; |
| if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_NONE])) |
| wq->type = IDXD_WQT_NONE; |
| else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_KERNEL])) |
| wq->type = IDXD_WQT_KERNEL; |
| else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER])) |
| wq->type = IDXD_WQT_USER; |
| else |
| return -EINVAL; |
| |
| /* If we are changing queue type, clear the name */ |
| if (wq->type != old_type) |
| memset(wq->name, 0, WQ_NAME_SIZE + 1); |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_type = |
| __ATTR(type, 0644, wq_type_show, wq_type_store); |
| |
| static ssize_t wq_name_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%s\n", wq->name); |
| } |
| |
| static ssize_t wq_name_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| if (strlen(buf) > WQ_NAME_SIZE || strlen(buf) == 0) |
| return -EINVAL; |
| |
| /* |
| * This is temporarily placed here until we have SVM support for |
| * dmaengine. |
| */ |
| if (wq->type == IDXD_WQT_KERNEL && device_pasid_enabled(wq->idxd)) |
| return -EOPNOTSUPP; |
| |
| memset(wq->name, 0, WQ_NAME_SIZE + 1); |
| strncpy(wq->name, buf, WQ_NAME_SIZE); |
| strreplace(wq->name, '\n', '\0'); |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_name = |
| __ATTR(name, 0644, wq_name_show, wq_name_store); |
| |
| static ssize_t wq_cdev_minor_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| int minor = -1; |
| |
| mutex_lock(&wq->wq_lock); |
| if (wq->idxd_cdev) |
| minor = wq->idxd_cdev->minor; |
| mutex_unlock(&wq->wq_lock); |
| |
| if (minor == -1) |
| return -ENXIO; |
| return sysfs_emit(buf, "%d\n", minor); |
| } |
| |
| static struct device_attribute dev_attr_wq_cdev_minor = |
| __ATTR(cdev_minor, 0444, wq_cdev_minor_show, NULL); |
| |
| static int __get_sysfs_u64(const char *buf, u64 *val) |
| { |
| int rc; |
| |
| rc = kstrtou64(buf, 0, val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (*val == 0) |
| return -EINVAL; |
| |
| *val = roundup_pow_of_two(*val); |
| return 0; |
| } |
| |
| static ssize_t wq_max_transfer_size_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%llu\n", wq->max_xfer_bytes); |
| } |
| |
| static ssize_t wq_max_transfer_size_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| u64 xfer_size; |
| int rc; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| rc = __get_sysfs_u64(buf, &xfer_size); |
| if (rc < 0) |
| return rc; |
| |
| if (xfer_size > idxd->max_xfer_bytes) |
| return -EINVAL; |
| |
| wq->max_xfer_bytes = xfer_size; |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_max_transfer_size = |
| __ATTR(max_transfer_size, 0644, |
| wq_max_transfer_size_show, wq_max_transfer_size_store); |
| |
| static ssize_t wq_max_batch_size_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", wq->max_batch_size); |
| } |
| |
| static ssize_t wq_max_batch_size_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| u64 batch_size; |
| int rc; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| rc = __get_sysfs_u64(buf, &batch_size); |
| if (rc < 0) |
| return rc; |
| |
| if (batch_size > idxd->max_batch_size) |
| return -EINVAL; |
| |
| wq->max_batch_size = (u32)batch_size; |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_max_batch_size = |
| __ATTR(max_batch_size, 0644, wq_max_batch_size_show, wq_max_batch_size_store); |
| |
| static ssize_t wq_ats_disable_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", wq->ats_dis); |
| } |
| |
| static ssize_t wq_ats_disable_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| struct idxd_device *idxd = wq->idxd; |
| bool ats_dis; |
| int rc; |
| |
| if (wq->state != IDXD_WQ_DISABLED) |
| return -EPERM; |
| |
| if (!idxd->hw.wq_cap.wq_ats_support) |
| return -EOPNOTSUPP; |
| |
| rc = kstrtobool(buf, &ats_dis); |
| if (rc < 0) |
| return rc; |
| |
| wq->ats_dis = ats_dis; |
| |
| return count; |
| } |
| |
| static struct device_attribute dev_attr_wq_ats_disable = |
| __ATTR(ats_disable, 0644, wq_ats_disable_show, wq_ats_disable_store); |
| |
| static struct attribute *idxd_wq_attributes[] = { |
| &dev_attr_wq_clients.attr, |
| &dev_attr_wq_state.attr, |
| &dev_attr_wq_group_id.attr, |
| &dev_attr_wq_mode.attr, |
| &dev_attr_wq_size.attr, |
| &dev_attr_wq_priority.attr, |
| &dev_attr_wq_block_on_fault.attr, |
| &dev_attr_wq_threshold.attr, |
| &dev_attr_wq_type.attr, |
| &dev_attr_wq_name.attr, |
| &dev_attr_wq_cdev_minor.attr, |
| &dev_attr_wq_max_transfer_size.attr, |
| &dev_attr_wq_max_batch_size.attr, |
| &dev_attr_wq_ats_disable.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group idxd_wq_attribute_group = { |
| .attrs = idxd_wq_attributes, |
| }; |
| |
| static const struct attribute_group *idxd_wq_attribute_groups[] = { |
| &idxd_wq_attribute_group, |
| NULL, |
| }; |
| |
| static void idxd_conf_wq_release(struct device *dev) |
| { |
| struct idxd_wq *wq = container_of(dev, struct idxd_wq, conf_dev); |
| |
| kfree(wq->wqcfg); |
| kfree(wq); |
| } |
| |
| struct device_type idxd_wq_device_type = { |
| .name = "wq", |
| .release = idxd_conf_wq_release, |
| .groups = idxd_wq_attribute_groups, |
| }; |
| |
| /* IDXD device attribs */ |
| static ssize_t version_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%#x\n", idxd->hw.version); |
| } |
| static DEVICE_ATTR_RO(version); |
| |
| static ssize_t max_work_queues_size_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_wq_size); |
| } |
| static DEVICE_ATTR_RO(max_work_queues_size); |
| |
| static ssize_t max_groups_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_groups); |
| } |
| static DEVICE_ATTR_RO(max_groups); |
| |
| static ssize_t max_work_queues_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_wqs); |
| } |
| static DEVICE_ATTR_RO(max_work_queues); |
| |
| static ssize_t max_engines_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_engines); |
| } |
| static DEVICE_ATTR_RO(max_engines); |
| |
| static ssize_t numa_node_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%d\n", dev_to_node(&idxd->pdev->dev)); |
| } |
| static DEVICE_ATTR_RO(numa_node); |
| |
| static ssize_t max_batch_size_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_batch_size); |
| } |
| static DEVICE_ATTR_RO(max_batch_size); |
| |
| static ssize_t max_transfer_size_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%llu\n", idxd->max_xfer_bytes); |
| } |
| static DEVICE_ATTR_RO(max_transfer_size); |
| |
| static ssize_t op_cap_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| int i, rc = 0; |
| |
| for (i = 0; i < 4; i++) |
| rc += sysfs_emit_at(buf, rc, "%#llx ", idxd->hw.opcap.bits[i]); |
| |
| rc--; |
| rc += sysfs_emit_at(buf, rc, "\n"); |
| return rc; |
| } |
| static DEVICE_ATTR_RO(op_cap); |
| |
| static ssize_t gen_cap_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%#llx\n", idxd->hw.gen_cap.bits); |
| } |
| static DEVICE_ATTR_RO(gen_cap); |
| |
| static ssize_t configurable_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)); |
| } |
| static DEVICE_ATTR_RO(configurable); |
| |
| static ssize_t clients_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| unsigned long flags; |
| int count = 0, i; |
| |
| spin_lock_irqsave(&idxd->dev_lock, flags); |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| count += wq->client_count; |
| } |
| spin_unlock_irqrestore(&idxd->dev_lock, flags); |
| |
| return sysfs_emit(buf, "%d\n", count); |
| } |
| static DEVICE_ATTR_RO(clients); |
| |
| static ssize_t pasid_enabled_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd)); |
| } |
| static DEVICE_ATTR_RO(pasid_enabled); |
| |
| static ssize_t state_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| switch (idxd->state) { |
| case IDXD_DEV_DISABLED: |
| case IDXD_DEV_CONF_READY: |
| return sysfs_emit(buf, "disabled\n"); |
| case IDXD_DEV_ENABLED: |
| return sysfs_emit(buf, "enabled\n"); |
| case IDXD_DEV_HALTED: |
| return sysfs_emit(buf, "halted\n"); |
| } |
| |
| return sysfs_emit(buf, "unknown\n"); |
| } |
| static DEVICE_ATTR_RO(state); |
| |
| static ssize_t errors_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| int i, out = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&idxd->dev_lock, flags); |
| for (i = 0; i < 4; i++) |
| out += sysfs_emit_at(buf, out, "%#018llx ", idxd->sw_err.bits[i]); |
| spin_unlock_irqrestore(&idxd->dev_lock, flags); |
| out--; |
| out += sysfs_emit_at(buf, out, "\n"); |
| return out; |
| } |
| static DEVICE_ATTR_RO(errors); |
| |
| static ssize_t max_tokens_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->max_tokens); |
| } |
| static DEVICE_ATTR_RO(max_tokens); |
| |
| static ssize_t token_limit_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->token_limit); |
| } |
| |
| static ssize_t token_limit_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| unsigned long val; |
| int rc; |
| |
| rc = kstrtoul(buf, 10, &val); |
| if (rc < 0) |
| return -EINVAL; |
| |
| if (idxd->state == IDXD_DEV_ENABLED) |
| return -EPERM; |
| |
| if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags)) |
| return -EPERM; |
| |
| if (!idxd->hw.group_cap.token_limit) |
| return -EPERM; |
| |
| if (val > idxd->hw.group_cap.total_tokens) |
| return -EINVAL; |
| |
| idxd->token_limit = val; |
| return count; |
| } |
| static DEVICE_ATTR_RW(token_limit); |
| |
| static ssize_t cdev_major_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = |
| container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%u\n", idxd->major); |
| } |
| static DEVICE_ATTR_RO(cdev_major); |
| |
| static ssize_t cmd_status_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); |
| |
| return sysfs_emit(buf, "%#x\n", idxd->cmd_status); |
| } |
| static DEVICE_ATTR_RO(cmd_status); |
| |
| static struct attribute *idxd_device_attributes[] = { |
| &dev_attr_version.attr, |
| &dev_attr_max_groups.attr, |
| &dev_attr_max_work_queues.attr, |
| &dev_attr_max_work_queues_size.attr, |
| &dev_attr_max_engines.attr, |
| &dev_attr_numa_node.attr, |
| &dev_attr_max_batch_size.attr, |
| &dev_attr_max_transfer_size.attr, |
| &dev_attr_op_cap.attr, |
| &dev_attr_gen_cap.attr, |
| &dev_attr_configurable.attr, |
| &dev_attr_clients.attr, |
| &dev_attr_pasid_enabled.attr, |
| &dev_attr_state.attr, |
| &dev_attr_errors.attr, |
| &dev_attr_max_tokens.attr, |
| &dev_attr_token_limit.attr, |
| &dev_attr_cdev_major.attr, |
| &dev_attr_cmd_status.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group idxd_device_attribute_group = { |
| .attrs = idxd_device_attributes, |
| }; |
| |
| static const struct attribute_group *idxd_attribute_groups[] = { |
| &idxd_device_attribute_group, |
| NULL, |
| }; |
| |
| static void idxd_conf_device_release(struct device *dev) |
| { |
| struct idxd_device *idxd = container_of(dev, struct idxd_device, conf_dev); |
| |
| kfree(idxd->groups); |
| kfree(idxd->wqs); |
| kfree(idxd->engines); |
| kfree(idxd->irq_entries); |
| kfree(idxd->int_handles); |
| ida_free(&idxd_ida, idxd->id); |
| kfree(idxd); |
| } |
| |
| struct device_type dsa_device_type = { |
| .name = "dsa", |
| .release = idxd_conf_device_release, |
| .groups = idxd_attribute_groups, |
| }; |
| |
| struct device_type iax_device_type = { |
| .name = "iax", |
| .release = idxd_conf_device_release, |
| .groups = idxd_attribute_groups, |
| }; |
| |
| static int idxd_register_engine_devices(struct idxd_device *idxd) |
| { |
| int i, j, rc; |
| |
| for (i = 0; i < idxd->max_engines; i++) { |
| struct idxd_engine *engine = idxd->engines[i]; |
| |
| rc = device_add(&engine->conf_dev); |
| if (rc < 0) |
| goto cleanup; |
| } |
| |
| return 0; |
| |
| cleanup: |
| j = i - 1; |
| for (; i < idxd->max_engines; i++) |
| put_device(&idxd->engines[i]->conf_dev); |
| |
| while (j--) |
| device_unregister(&idxd->engines[j]->conf_dev); |
| return rc; |
| } |
| |
| static int idxd_register_group_devices(struct idxd_device *idxd) |
| { |
| int i, j, rc; |
| |
| for (i = 0; i < idxd->max_groups; i++) { |
| struct idxd_group *group = idxd->groups[i]; |
| |
| rc = device_add(&group->conf_dev); |
| if (rc < 0) |
| goto cleanup; |
| } |
| |
| return 0; |
| |
| cleanup: |
| j = i - 1; |
| for (; i < idxd->max_groups; i++) |
| put_device(&idxd->groups[i]->conf_dev); |
| |
| while (j--) |
| device_unregister(&idxd->groups[j]->conf_dev); |
| return rc; |
| } |
| |
| static int idxd_register_wq_devices(struct idxd_device *idxd) |
| { |
| int i, rc, j; |
| |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| rc = device_add(&wq->conf_dev); |
| if (rc < 0) |
| goto cleanup; |
| } |
| |
| return 0; |
| |
| cleanup: |
| j = i - 1; |
| for (; i < idxd->max_wqs; i++) |
| put_device(&idxd->wqs[i]->conf_dev); |
| |
| while (j--) |
| device_unregister(&idxd->wqs[j]->conf_dev); |
| return rc; |
| } |
| |
| int idxd_register_devices(struct idxd_device *idxd) |
| { |
| struct device *dev = &idxd->pdev->dev; |
| int rc, i; |
| |
| rc = device_add(&idxd->conf_dev); |
| if (rc < 0) |
| return rc; |
| |
| rc = idxd_register_wq_devices(idxd); |
| if (rc < 0) { |
| dev_dbg(dev, "WQ devices registering failed: %d\n", rc); |
| goto err_wq; |
| } |
| |
| rc = idxd_register_engine_devices(idxd); |
| if (rc < 0) { |
| dev_dbg(dev, "Engine devices registering failed: %d\n", rc); |
| goto err_engine; |
| } |
| |
| rc = idxd_register_group_devices(idxd); |
| if (rc < 0) { |
| dev_dbg(dev, "Group device registering failed: %d\n", rc); |
| goto err_group; |
| } |
| |
| return 0; |
| |
| err_group: |
| for (i = 0; i < idxd->max_engines; i++) |
| device_unregister(&idxd->engines[i]->conf_dev); |
| err_engine: |
| for (i = 0; i < idxd->max_wqs; i++) |
| device_unregister(&idxd->wqs[i]->conf_dev); |
| err_wq: |
| device_del(&idxd->conf_dev); |
| return rc; |
| } |
| |
| void idxd_unregister_devices(struct idxd_device *idxd) |
| { |
| int i; |
| |
| for (i = 0; i < idxd->max_wqs; i++) { |
| struct idxd_wq *wq = idxd->wqs[i]; |
| |
| device_unregister(&wq->conf_dev); |
| } |
| |
| for (i = 0; i < idxd->max_engines; i++) { |
| struct idxd_engine *engine = idxd->engines[i]; |
| |
| device_unregister(&engine->conf_dev); |
| } |
| |
| for (i = 0; i < idxd->max_groups; i++) { |
| struct idxd_group *group = idxd->groups[i]; |
| |
| device_unregister(&group->conf_dev); |
| } |
| |
| device_unregister(&idxd->conf_dev); |
| } |
| |
| int idxd_register_bus_type(void) |
| { |
| return bus_register(&dsa_bus_type); |
| } |
| |
| void idxd_unregister_bus_type(void) |
| { |
| bus_unregister(&dsa_bus_type); |
| } |