Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jiri Pirko | 958 | 60.94% | 11 | 37.93% |
Jakub Kiciński | 332 | 21.12% | 7 | 24.14% |
Taehee Yoo | 130 | 8.27% | 1 | 3.45% |
Ido Schimmel | 65 | 4.13% | 1 | 3.45% |
Peilin Ye | 32 | 2.04% | 1 | 3.45% |
Zhengchao Shao | 31 | 1.97% | 1 | 3.45% |
Dmytro Linkin | 14 | 0.89% | 2 | 6.90% |
Gustavo A. R. Silva | 4 | 0.25% | 1 | 3.45% |
David Ahern | 2 | 0.13% | 1 | 3.45% |
Greg Kroah-Hartman | 2 | 0.13% | 1 | 3.45% |
Yue haibing | 1 | 0.06% | 1 | 3.45% |
Uwe Kleine-König | 1 | 0.06% | 1 | 3.45% |
Total | 1572 | 29 |
// SPDX-License-Identifier: GPL-2.0 /* Copyright (C) 2017 Netronome Systems, Inc. * Copyright (C) 2019 Mellanox Technologies. All rights reserved */ #include <linux/completion.h> #include <linux/device.h> #include <linux/idr.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/mutex.h> #include <linux/refcount.h> #include <linux/slab.h> #include <linux/sysfs.h> #include "netdevsim.h" static DEFINE_IDA(nsim_bus_dev_ids); static LIST_HEAD(nsim_bus_dev_list); static DEFINE_MUTEX(nsim_bus_dev_list_lock); static bool nsim_bus_enable; static refcount_t nsim_bus_devs; /* Including the bus itself. */ static DECLARE_COMPLETION(nsim_bus_devs_released); static struct nsim_bus_dev *to_nsim_bus_dev(struct device *dev) { return container_of(dev, struct nsim_bus_dev, dev); } static ssize_t nsim_bus_dev_numvfs_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); unsigned int num_vfs; int ret; ret = kstrtouint(buf, 0, &num_vfs); if (ret) return ret; device_lock(dev); ret = -ENOENT; if (dev_get_drvdata(dev)) ret = nsim_drv_configure_vfs(nsim_bus_dev, num_vfs); device_unlock(dev); return ret ? ret : count; } static ssize_t nsim_bus_dev_numvfs_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); return sprintf(buf, "%u\n", nsim_bus_dev->num_vfs); } static struct device_attribute nsim_bus_dev_numvfs_attr = __ATTR(sriov_numvfs, 0664, nsim_bus_dev_numvfs_show, nsim_bus_dev_numvfs_store); static ssize_t new_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); unsigned int port_index; int ret; /* Prevent to use nsim_bus_dev before initialization. */ if (!smp_load_acquire(&nsim_bus_dev->init)) return -EBUSY; ret = kstrtouint(buf, 0, &port_index); if (ret) return ret; ret = nsim_drv_port_add(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index); return ret ? ret : count; } static struct device_attribute nsim_bus_dev_new_port_attr = __ATTR_WO(new_port); static ssize_t del_port_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); unsigned int port_index; int ret; /* Prevent to use nsim_bus_dev before initialization. */ if (!smp_load_acquire(&nsim_bus_dev->init)) return -EBUSY; ret = kstrtouint(buf, 0, &port_index); if (ret) return ret; ret = nsim_drv_port_del(nsim_bus_dev, NSIM_DEV_PORT_TYPE_PF, port_index); return ret ? ret : count; } static struct device_attribute nsim_bus_dev_del_port_attr = __ATTR_WO(del_port); static struct attribute *nsim_bus_dev_attrs[] = { &nsim_bus_dev_numvfs_attr.attr, &nsim_bus_dev_new_port_attr.attr, &nsim_bus_dev_del_port_attr.attr, NULL, }; static const struct attribute_group nsim_bus_dev_attr_group = { .attrs = nsim_bus_dev_attrs, }; static const struct attribute_group *nsim_bus_dev_attr_groups[] = { &nsim_bus_dev_attr_group, NULL, }; static void nsim_bus_dev_release(struct device *dev) { struct nsim_bus_dev *nsim_bus_dev; nsim_bus_dev = container_of(dev, struct nsim_bus_dev, dev); kfree(nsim_bus_dev); if (refcount_dec_and_test(&nsim_bus_devs)) complete(&nsim_bus_devs_released); } static struct device_type nsim_bus_dev_type = { .groups = nsim_bus_dev_attr_groups, .release = nsim_bus_dev_release, }; static struct nsim_bus_dev * nsim_bus_dev_new(unsigned int id, unsigned int port_count, unsigned int num_queues); static ssize_t new_device_store(const struct bus_type *bus, const char *buf, size_t count) { unsigned int id, port_count, num_queues; struct nsim_bus_dev *nsim_bus_dev; int err; err = sscanf(buf, "%u %u %u", &id, &port_count, &num_queues); switch (err) { case 1: port_count = 1; fallthrough; case 2: num_queues = 1; fallthrough; case 3: if (id > INT_MAX) { pr_err("Value of \"id\" is too big.\n"); return -EINVAL; } break; default: pr_err("Format for adding new device is \"id port_count num_queues\" (uint uint unit).\n"); return -EINVAL; } mutex_lock(&nsim_bus_dev_list_lock); /* Prevent to use resource before initialization. */ if (!smp_load_acquire(&nsim_bus_enable)) { err = -EBUSY; goto err; } nsim_bus_dev = nsim_bus_dev_new(id, port_count, num_queues); if (IS_ERR(nsim_bus_dev)) { err = PTR_ERR(nsim_bus_dev); goto err; } refcount_inc(&nsim_bus_devs); /* Allow using nsim_bus_dev */ smp_store_release(&nsim_bus_dev->init, true); list_add_tail(&nsim_bus_dev->list, &nsim_bus_dev_list); mutex_unlock(&nsim_bus_dev_list_lock); return count; err: mutex_unlock(&nsim_bus_dev_list_lock); return err; } static BUS_ATTR_WO(new_device); static void nsim_bus_dev_del(struct nsim_bus_dev *nsim_bus_dev); static ssize_t del_device_store(const struct bus_type *bus, const char *buf, size_t count) { struct nsim_bus_dev *nsim_bus_dev, *tmp; unsigned int id; int err; err = sscanf(buf, "%u", &id); switch (err) { case 1: if (id > INT_MAX) { pr_err("Value of \"id\" is too big.\n"); return -EINVAL; } break; default: pr_err("Format for deleting device is \"id\" (uint).\n"); return -EINVAL; } err = -ENOENT; mutex_lock(&nsim_bus_dev_list_lock); /* Prevent to use resource before initialization. */ if (!smp_load_acquire(&nsim_bus_enable)) { mutex_unlock(&nsim_bus_dev_list_lock); return -EBUSY; } list_for_each_entry_safe(nsim_bus_dev, tmp, &nsim_bus_dev_list, list) { if (nsim_bus_dev->dev.id != id) continue; list_del(&nsim_bus_dev->list); nsim_bus_dev_del(nsim_bus_dev); err = 0; break; } mutex_unlock(&nsim_bus_dev_list_lock); return !err ? count : err; } static BUS_ATTR_WO(del_device); static struct attribute *nsim_bus_attrs[] = { &bus_attr_new_device.attr, &bus_attr_del_device.attr, NULL }; ATTRIBUTE_GROUPS(nsim_bus); static int nsim_bus_probe(struct device *dev) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); return nsim_drv_probe(nsim_bus_dev); } static void nsim_bus_remove(struct device *dev) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); nsim_drv_remove(nsim_bus_dev); } static int nsim_num_vf(struct device *dev) { struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev); return nsim_bus_dev->num_vfs; } static struct bus_type nsim_bus = { .name = DRV_NAME, .dev_name = DRV_NAME, .bus_groups = nsim_bus_groups, .probe = nsim_bus_probe, .remove = nsim_bus_remove, .num_vf = nsim_num_vf, }; #define NSIM_BUS_DEV_MAX_VFS 4 static struct nsim_bus_dev * nsim_bus_dev_new(unsigned int id, unsigned int port_count, unsigned int num_queues) { struct nsim_bus_dev *nsim_bus_dev; int err; nsim_bus_dev = kzalloc(sizeof(*nsim_bus_dev), GFP_KERNEL); if (!nsim_bus_dev) return ERR_PTR(-ENOMEM); err = ida_alloc_range(&nsim_bus_dev_ids, id, id, GFP_KERNEL); if (err < 0) goto err_nsim_bus_dev_free; nsim_bus_dev->dev.id = err; nsim_bus_dev->dev.bus = &nsim_bus; nsim_bus_dev->dev.type = &nsim_bus_dev_type; nsim_bus_dev->port_count = port_count; nsim_bus_dev->num_queues = num_queues; nsim_bus_dev->initial_net = current->nsproxy->net_ns; nsim_bus_dev->max_vfs = NSIM_BUS_DEV_MAX_VFS; /* Disallow using nsim_bus_dev */ smp_store_release(&nsim_bus_dev->init, false); err = device_register(&nsim_bus_dev->dev); if (err) goto err_nsim_bus_dev_id_free; return nsim_bus_dev; err_nsim_bus_dev_id_free: ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id); put_device(&nsim_bus_dev->dev); nsim_bus_dev = NULL; err_nsim_bus_dev_free: kfree(nsim_bus_dev); return ERR_PTR(err); } static void nsim_bus_dev_del(struct nsim_bus_dev *nsim_bus_dev) { /* Disallow using nsim_bus_dev */ smp_store_release(&nsim_bus_dev->init, false); ida_free(&nsim_bus_dev_ids, nsim_bus_dev->dev.id); device_unregister(&nsim_bus_dev->dev); } static struct device_driver nsim_driver = { .name = DRV_NAME, .bus = &nsim_bus, .owner = THIS_MODULE, }; int nsim_bus_init(void) { int err; err = bus_register(&nsim_bus); if (err) return err; err = driver_register(&nsim_driver); if (err) goto err_bus_unregister; refcount_set(&nsim_bus_devs, 1); /* Allow using resources */ smp_store_release(&nsim_bus_enable, true); return 0; err_bus_unregister: bus_unregister(&nsim_bus); return err; } void nsim_bus_exit(void) { struct nsim_bus_dev *nsim_bus_dev, *tmp; /* Disallow using resources */ smp_store_release(&nsim_bus_enable, false); if (refcount_dec_and_test(&nsim_bus_devs)) complete(&nsim_bus_devs_released); mutex_lock(&nsim_bus_dev_list_lock); list_for_each_entry_safe(nsim_bus_dev, tmp, &nsim_bus_dev_list, list) { list_del(&nsim_bus_dev->list); nsim_bus_dev_del(nsim_bus_dev); } mutex_unlock(&nsim_bus_dev_list_lock); wait_for_completion(&nsim_bus_devs_released); driver_unregister(&nsim_driver); bus_unregister(&nsim_bus); }
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1