// SPDX-License-Identifier: GPL-2.0-only /* * Loopback IEEE 802.15.4 interface * * Copyright 2007-2012 Siemens AG * * Written by: * Sergey Lapin * Dmitry Eremin-Solenikov * Alexander Smirnov */ #include #include #include #include #include #include #include #include static int numlbs = 2; static LIST_HEAD(fakelb_phys); static DEFINE_MUTEX(fakelb_phys_lock); static LIST_HEAD(fakelb_ifup_phys); static DEFINE_RWLOCK(fakelb_ifup_phys_lock); struct fakelb_phy { struct ieee802154_hw *hw; u8 page; u8 channel; bool suspended; struct list_head list; struct list_head list_ifup; }; static int fakelb_hw_ed(struct ieee802154_hw *hw, u8 *level) { WARN_ON(!level); *level = 0xbe; return 0; } static int fakelb_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel) { struct fakelb_phy *phy = hw->priv; write_lock_bh(&fakelb_ifup_phys_lock); phy->page = page; phy->channel = channel; write_unlock_bh(&fakelb_ifup_phys_lock); return 0; } static int fakelb_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) { struct fakelb_phy *current_phy = hw->priv, *phy; read_lock_bh(&fakelb_ifup_phys_lock); WARN_ON(current_phy->suspended); list_for_each_entry(phy, &fakelb_ifup_phys, list_ifup) { if (current_phy == phy) continue; if (current_phy->page == phy->page && current_phy->channel == phy->channel) { struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC); if (newskb) ieee802154_rx_irqsafe(phy->hw, newskb, 0xcc); } } read_unlock_bh(&fakelb_ifup_phys_lock); ieee802154_xmit_complete(hw, skb, false); return 0; } static int fakelb_hw_start(struct ieee802154_hw *hw) { struct fakelb_phy *phy = hw->priv; write_lock_bh(&fakelb_ifup_phys_lock); phy->suspended = false; list_add(&phy->list_ifup, &fakelb_ifup_phys); write_unlock_bh(&fakelb_ifup_phys_lock); return 0; } static void fakelb_hw_stop(struct ieee802154_hw *hw) { struct fakelb_phy *phy = hw->priv; write_lock_bh(&fakelb_ifup_phys_lock); phy->suspended = true; list_del(&phy->list_ifup); write_unlock_bh(&fakelb_ifup_phys_lock); } static int fakelb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on) { return 0; } static const struct ieee802154_ops fakelb_ops = { .owner = THIS_MODULE, .xmit_async = fakelb_hw_xmit, .ed = fakelb_hw_ed, .set_channel = fakelb_hw_channel, .start = fakelb_hw_start, .stop = fakelb_hw_stop, .set_promiscuous_mode = fakelb_set_promiscuous_mode, }; /* Number of dummy devices to be set up by this module. */ module_param(numlbs, int, 0); MODULE_PARM_DESC(numlbs, " number of pseudo devices"); static int fakelb_add_one(struct device *dev) { struct ieee802154_hw *hw; struct fakelb_phy *phy; int err; hw = ieee802154_alloc_hw(sizeof(*phy), &fakelb_ops); if (!hw) return -ENOMEM; phy = hw->priv; phy->hw = hw; /* 868 MHz BPSK 802.15.4-2003 */ hw->phy->supported.channels[0] |= 1; /* 915 MHz BPSK 802.15.4-2003 */ hw->phy->supported.channels[0] |= 0x7fe; /* 2.4 GHz O-QPSK 802.15.4-2003 */ hw->phy->supported.channels[0] |= 0x7FFF800; /* 868 MHz ASK 802.15.4-2006 */ hw->phy->supported.channels[1] |= 1; /* 915 MHz ASK 802.15.4-2006 */ hw->phy->supported.channels[1] |= 0x7fe; /* 868 MHz O-QPSK 802.15.4-2006 */ hw->phy->supported.channels[2] |= 1; /* 915 MHz O-QPSK 802.15.4-2006 */ hw->phy->supported.channels[2] |= 0x7fe; /* 2.4 GHz CSS 802.15.4a-2007 */ hw->phy->supported.channels[3] |= 0x3fff; /* UWB Sub-gigahertz 802.15.4a-2007 */ hw->phy->supported.channels[4] |= 1; /* UWB Low band 802.15.4a-2007 */ hw->phy->supported.channels[4] |= 0x1e; /* UWB High band 802.15.4a-2007 */ hw->phy->supported.channels[4] |= 0xffe0; /* 750 MHz O-QPSK 802.15.4c-2009 */ hw->phy->supported.channels[5] |= 0xf; /* 750 MHz MPSK 802.15.4c-2009 */ hw->phy->supported.channels[5] |= 0xf0; /* 950 MHz BPSK 802.15.4d-2009 */ hw->phy->supported.channels[6] |= 0x3ff; /* 950 MHz GFSK 802.15.4d-2009 */ hw->phy->supported.channels[6] |= 0x3ffc00; ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); /* fake phy channel 13 as default */ hw->phy->current_channel = 13; phy->channel = hw->phy->current_channel; hw->flags = IEEE802154_HW_PROMISCUOUS; hw->parent = dev; err = ieee802154_register_hw(hw); if (err) goto err_reg; mutex_lock(&fakelb_phys_lock); list_add_tail(&phy->list, &fakelb_phys); mutex_unlock(&fakelb_phys_lock); return 0; err_reg: ieee802154_free_hw(phy->hw); return err; } static void fakelb_del(struct fakelb_phy *phy) { list_del(&phy->list); ieee802154_unregister_hw(phy->hw); ieee802154_free_hw(phy->hw); } static int fakelb_probe(struct platform_device *pdev) { struct fakelb_phy *phy, *tmp; int err, i; for (i = 0; i < numlbs; i++) { err = fakelb_add_one(&pdev->dev); if (err < 0) goto err_slave; } dev_info(&pdev->dev, "added %i fake ieee802154 hardware devices\n", numlbs); return 0; err_slave: mutex_lock(&fakelb_phys_lock); list_for_each_entry_safe(phy, tmp, &fakelb_phys, list) fakelb_del(phy); mutex_unlock(&fakelb_phys_lock); return err; } static void fakelb_remove(struct platform_device *pdev) { struct fakelb_phy *phy, *tmp; mutex_lock(&fakelb_phys_lock); list_for_each_entry_safe(phy, tmp, &fakelb_phys, list) fakelb_del(phy); mutex_unlock(&fakelb_phys_lock); } static struct platform_device *ieee802154fake_dev; static struct platform_driver ieee802154fake_driver = { .probe = fakelb_probe, .remove = fakelb_remove, .driver = { .name = "ieee802154fakelb", }, }; static __init int fakelb_init_module(void) { ieee802154fake_dev = platform_device_register_simple( "ieee802154fakelb", -1, NULL, 0); pr_warn("fakelb driver is marked as deprecated, please use mac802154_hwsim!\n"); return platform_driver_register(&ieee802154fake_driver); } static __exit void fake_remove_module(void) { platform_driver_unregister(&ieee802154fake_driver); platform_device_unregister(ieee802154fake_dev); } module_init(fakelb_init_module); module_exit(fake_remove_module); MODULE_DESCRIPTION("IEEE 802.15.4 loopback driver"); MODULE_LICENSE("GPL");