Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 929 insertions, 0 deletions

diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
new file mode 100644
index 000000000..9b3da6184
--- /dev/null
+++ b/drivers/net/ieee802154/mac802154_hwsim.c
@@ -0,0 +1,929 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * HWSIM IEEE 802.15.4 interface
+ *
+ * (C) 2018 Mojatau, Alexander Aring <aring@mojatau.com>
+ * Copyright 2007-2012 Siemens AG
+ *
+ * Based on fakelb, original Written by:
+ * Sergey Lapin <slapin@ossfans.org>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/platform_device.h>
+#include <linux/rtnetlink.h>
+#include <linux/netdevice.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <net/mac802154.h>
+#include <net/cfg802154.h>
+#include <net/genetlink.h>
+#include "mac802154_hwsim.h"
+
+MODULE_DESCRIPTION("Software simulator of IEEE 802.15.4 radio(s) for mac802154");
+MODULE_LICENSE("GPL");
+
+static LIST_HEAD(hwsim_phys);
+static DEFINE_MUTEX(hwsim_phys_lock);
+
+static struct platform_device *mac802154hwsim_dev;
+
+/* MAC802154_HWSIM netlink family */
+static struct genl_family hwsim_genl_family;
+
+static int hwsim_radio_idx;
+
+enum hwsim_multicast_groups {
+	HWSIM_MCGRP_CONFIG,
+};
+
+static const struct genl_multicast_group hwsim_mcgrps[] = {
+	[HWSIM_MCGRP_CONFIG] = { .name = "config", },
+};
+
+struct hwsim_pib {
+	u8 page;
+	u8 channel;
+
+	struct rcu_head rcu;
+};
+
+struct hwsim_edge_info {
+	u8 lqi;
+
+	struct rcu_head rcu;
+};
+
+struct hwsim_edge {
+	struct hwsim_phy *endpoint;
+	struct hwsim_edge_info __rcu *info;
+
+	struct list_head list;
+	struct rcu_head rcu;
+};
+
+struct hwsim_phy {
+	struct ieee802154_hw *hw;
+	u32 idx;
+
+	struct hwsim_pib __rcu *pib;
+
+	bool suspended;
+	struct list_head edges;
+
+	struct list_head list;
+};
+
+static int hwsim_add_one(struct genl_info *info, struct device *dev,
+			 bool init);
+static void hwsim_del(struct hwsim_phy *phy);
+
+static int hwsim_hw_ed(struct ieee802154_hw *hw, u8 *level)
+{
+	*level = 0xbe;
+
+	return 0;
+}
+
+static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
+{
+	struct hwsim_phy *phy = hw->priv;
+	struct hwsim_pib *pib, *pib_old;
+
+	pib = kzalloc(sizeof(*pib), GFP_KERNEL);
+	if (!pib)
+		return -ENOMEM;
+
+	pib->page = page;
+	pib->channel = channel;
+
+	pib_old = rtnl_dereference(phy->pib);
+	rcu_assign_pointer(phy->pib, pib);
+	kfree_rcu(pib_old, rcu);
+	return 0;
+}
+
+static int hwsim_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
+{
+	struct hwsim_phy *current_phy = hw->priv;
+	struct hwsim_pib *current_pib, *endpoint_pib;
+	struct hwsim_edge_info *einfo;
+	struct hwsim_edge *e;
+
+	WARN_ON(current_phy->suspended);
+
+	rcu_read_lock();
+	current_pib = rcu_dereference(current_phy->pib);
+	list_for_each_entry_rcu(e, &current_phy->edges, list) {
+		/* Can be changed later in rx_irqsafe, but this is only a
+		 * performance tweak. Received radio should drop the frame
+		 * in mac802154 stack anyway... so we don't need to be
+		 * 100% of locking here to check on suspended
+		 */
+		if (e->endpoint->suspended)
+			continue;
+
+		endpoint_pib = rcu_dereference(e->endpoint->pib);
+		if (current_pib->page == endpoint_pib->page &&
+		    current_pib->channel == endpoint_pib->channel) {
+			struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
+
+			einfo = rcu_dereference(e->info);
+			if (newskb)
+				ieee802154_rx_irqsafe(e->endpoint->hw, newskb,
+						      einfo->lqi);
+		}
+	}
+	rcu_read_unlock();
+
+	ieee802154_xmit_complete(hw, skb, false);
+	return 0;
+}
+
+static int hwsim_hw_start(struct ieee802154_hw *hw)
+{
+	struct hwsim_phy *phy = hw->priv;
+
+	phy->suspended = false;
+	return 0;
+}
+
+static void hwsim_hw_stop(struct ieee802154_hw *hw)
+{
+	struct hwsim_phy *phy = hw->priv;
+
+	phy->suspended = true;
+}
+
+static int
+hwsim_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
+{
+	return 0;
+}
+
+static const struct ieee802154_ops hwsim_ops = {
+	.owner = THIS_MODULE,
+	.xmit_async = hwsim_hw_xmit,
+	.ed = hwsim_hw_ed,
+	.set_channel = hwsim_hw_channel,
+	.start = hwsim_hw_start,
+	.stop = hwsim_hw_stop,
+	.set_promiscuous_mode = hwsim_set_promiscuous_mode,
+};
+
+static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
+{
+	return hwsim_add_one(info, &mac802154hwsim_dev->dev, false);
+}
+
+static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
+{
+	struct hwsim_phy *phy, *tmp;
+	s64 idx = -1;
+
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID])
+		return -EINVAL;
+
+	idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
+
+	mutex_lock(&hwsim_phys_lock);
+	list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) {
+		if (idx == phy->idx) {
+			hwsim_del(phy);
+			mutex_unlock(&hwsim_phys_lock);
+			return 0;
+		}
+	}
+	mutex_unlock(&hwsim_phys_lock);
+
+	return -ENODEV;
+}
+
+static int append_radio_msg(struct sk_buff *skb, struct hwsim_phy *phy)
+{
+	struct nlattr *nl_edges, *nl_edge;
+	struct hwsim_edge_info *einfo;
+	struct hwsim_edge *e;
+	int ret;
+
+	ret = nla_put_u32(skb, MAC802154_HWSIM_ATTR_RADIO_ID, phy->idx);
+	if (ret < 0)
+		return ret;
+
+	rcu_read_lock();
+	if (list_empty(&phy->edges)) {
+		rcu_read_unlock();
+		return 0;
+	}
+
+	nl_edges = nla_nest_start_noflag(skb,
+					 MAC802154_HWSIM_ATTR_RADIO_EDGES);
+	if (!nl_edges) {
+		rcu_read_unlock();
+		return -ENOBUFS;
+	}
+
+	list_for_each_entry_rcu(e, &phy->edges, list) {
+		nl_edge = nla_nest_start_noflag(skb,
+						MAC802154_HWSIM_ATTR_RADIO_EDGE);
+		if (!nl_edge) {
+			rcu_read_unlock();
+			nla_nest_cancel(skb, nl_edges);
+			return -ENOBUFS;
+		}
+
+		ret = nla_put_u32(skb, MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID,
+				  e->endpoint->idx);
+		if (ret < 0) {
+			rcu_read_unlock();
+			nla_nest_cancel(skb, nl_edge);
+			nla_nest_cancel(skb, nl_edges);
+			return ret;
+		}
+
+		einfo = rcu_dereference(e->info);
+		ret = nla_put_u8(skb, MAC802154_HWSIM_EDGE_ATTR_LQI,
+				 einfo->lqi);
+		if (ret < 0) {
+			rcu_read_unlock();
+			nla_nest_cancel(skb, nl_edge);
+			nla_nest_cancel(skb, nl_edges);
+			return ret;
+		}
+
+		nla_nest_end(skb, nl_edge);
+	}
+	rcu_read_unlock();
+
+	nla_nest_end(skb, nl_edges);
+
+	return 0;
+}
+
+static int hwsim_get_radio(struct sk_buff *skb, struct hwsim_phy *phy,
+			   u32 portid, u32 seq,
+			   struct netlink_callback *cb, int flags)
+{
+	void *hdr;
+	int res;
+
+	hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
+			  MAC802154_HWSIM_CMD_GET_RADIO);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (cb)
+		genl_dump_check_consistent(cb, hdr);
+
+	res = append_radio_msg(skb, phy);
+	if (res < 0)
+		goto out_err;
+
+	genlmsg_end(skb, hdr);
+	return 0;
+
+out_err:
+	genlmsg_cancel(skb, hdr);
+	return res;
+}
+
+static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
+{
+	struct hwsim_phy *phy;
+	struct sk_buff *skb;
+	int idx, res = -ENODEV;
+
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID])
+		return -EINVAL;
+	idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
+
+	mutex_lock(&hwsim_phys_lock);
+	list_for_each_entry(phy, &hwsim_phys, list) {
+		if (phy->idx != idx)
+			continue;
+
+		skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
+		if (!skb) {
+			res = -ENOMEM;
+			goto out_err;
+		}
+
+		res = hwsim_get_radio(skb, phy, info->snd_portid,
+				      info->snd_seq, NULL, 0);
+		if (res < 0) {
+			nlmsg_free(skb);
+			goto out_err;
+		}
+
+		res = genlmsg_reply(skb, info);
+		break;
+	}
+
+out_err:
+	mutex_unlock(&hwsim_phys_lock);
+
+	return res;
+}
+
+static int hwsim_dump_radio_nl(struct sk_buff *skb,
+			       struct netlink_callback *cb)
+{
+	int idx = cb->args[0];
+	struct hwsim_phy *phy;
+	int res;
+
+	mutex_lock(&hwsim_phys_lock);
+
+	if (idx == hwsim_radio_idx)
+		goto done;
+
+	list_for_each_entry(phy, &hwsim_phys, list) {
+		if (phy->idx < idx)
+			continue;
+
+		res = hwsim_get_radio(skb, phy, NETLINK_CB(cb->skb).portid,
+				      cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
+		if (res < 0)
+			break;
+
+		idx = phy->idx + 1;
+	}
+
+	cb->args[0] = idx;
+
+done:
+	mutex_unlock(&hwsim_phys_lock);
+	return skb->len;
+}
+
+/* caller need to held hwsim_phys_lock */
+static struct hwsim_phy *hwsim_get_radio_by_id(uint32_t idx)
+{
+	struct hwsim_phy *phy;
+
+	list_for_each_entry(phy, &hwsim_phys, list) {
+		if (phy->idx == idx)
+			return phy;
+	}
+
+	return NULL;
+}
+
+static const struct nla_policy hwsim_edge_policy[MAC802154_HWSIM_EDGE_ATTR_MAX + 1] = {
+	[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] = { .type = NLA_U32 },
+	[MAC802154_HWSIM_EDGE_ATTR_LQI] = { .type = NLA_U8 },
+};
+
+static struct hwsim_edge *hwsim_alloc_edge(struct hwsim_phy *endpoint, u8 lqi)
+{
+	struct hwsim_edge_info *einfo;
+	struct hwsim_edge *e;
+
+	e = kzalloc(sizeof(*e), GFP_KERNEL);
+	if (!e)
+		return NULL;
+
+	einfo = kzalloc(sizeof(*einfo), GFP_KERNEL);
+	if (!einfo) {
+		kfree(e);
+		return NULL;
+	}
+
+	einfo->lqi = 0xff;
+	rcu_assign_pointer(e->info, einfo);
+	e->endpoint = endpoint;
+
+	return e;
+}
+
+static void hwsim_free_edge(struct hwsim_edge *e)
+{
+	struct hwsim_edge_info *einfo;
+
+	rcu_read_lock();
+	einfo = rcu_dereference(e->info);
+	rcu_read_unlock();
+
+	kfree_rcu(einfo, rcu);
+	kfree_rcu(e, rcu);
+}
+
+static int hwsim_new_edge_nl(struct sk_buff *msg, struct genl_info *info)
+{
+	struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
+	struct hwsim_phy *phy_v0, *phy_v1;
+	struct hwsim_edge *e;
+	u32 v0, v1;
+
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] ||
+	    !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
+		return -EINVAL;
+
+	if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
+		return -EINVAL;
+
+	if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID])
+		return -EINVAL;
+
+	v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
+	v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
+
+	if (v0 == v1)
+		return -EINVAL;
+
+	mutex_lock(&hwsim_phys_lock);
+	phy_v0 = hwsim_get_radio_by_id(v0);
+	if (!phy_v0) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOENT;
+	}
+
+	phy_v1 = hwsim_get_radio_by_id(v1);
+	if (!phy_v1) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOENT;
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(e, &phy_v0->edges, list) {
+		if (e->endpoint->idx == v1) {
+			mutex_unlock(&hwsim_phys_lock);
+			rcu_read_unlock();
+			return -EEXIST;
+		}
+	}
+	rcu_read_unlock();
+
+	e = hwsim_alloc_edge(phy_v1, 0xff);
+	if (!e) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOMEM;
+	}
+	list_add_rcu(&e->list, &phy_v0->edges);
+	/* wait until changes are done under hwsim_phys_lock lock
+	 * should prevent of calling this function twice while
+	 * edges list has not the changes yet.
+	 */
+	synchronize_rcu();
+	mutex_unlock(&hwsim_phys_lock);
+
+	return 0;
+}
+
+static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info)
+{
+	struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
+	struct hwsim_phy *phy_v0;
+	struct hwsim_edge *e;
+	u32 v0, v1;
+
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] ||
+	    !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
+		return -EINVAL;
+
+	if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
+		return -EINVAL;
+
+	if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID])
+		return -EINVAL;
+
+	v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
+	v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
+
+	mutex_lock(&hwsim_phys_lock);
+	phy_v0 = hwsim_get_radio_by_id(v0);
+	if (!phy_v0) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOENT;
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(e, &phy_v0->edges, list) {
+		if (e->endpoint->idx == v1) {
+			rcu_read_unlock();
+			list_del_rcu(&e->list);
+			hwsim_free_edge(e);
+			/* same again - wait until list changes are done */
+			synchronize_rcu();
+			mutex_unlock(&hwsim_phys_lock);
+			return 0;
+		}
+	}
+	rcu_read_unlock();
+
+	mutex_unlock(&hwsim_phys_lock);
+
+	return -ENOENT;
+}
+
+static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info)
+{
+	struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
+	struct hwsim_edge_info *einfo, *einfo_old;
+	struct hwsim_phy *phy_v0;
+	struct hwsim_edge *e;
+	u32 v0, v1;
+	u8 lqi;
+
+	if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] ||
+	    !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
+		return -EINVAL;
+
+	if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
+		return -EINVAL;
+
+	if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] ||
+	    !edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI])
+		return -EINVAL;
+
+	v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
+	v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
+	lqi = nla_get_u8(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI]);
+
+	mutex_lock(&hwsim_phys_lock);
+	phy_v0 = hwsim_get_radio_by_id(v0);
+	if (!phy_v0) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOENT;
+	}
+
+	einfo = kzalloc(sizeof(*einfo), GFP_KERNEL);
+	if (!einfo) {
+		mutex_unlock(&hwsim_phys_lock);
+		return -ENOMEM;
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(e, &phy_v0->edges, list) {
+		if (e->endpoint->idx == v1) {
+			einfo->lqi = lqi;
+			einfo_old = rcu_replace_pointer(e->info, einfo,
+							lockdep_is_held(&hwsim_phys_lock));
+			rcu_read_unlock();
+			kfree_rcu(einfo_old, rcu);
+			mutex_unlock(&hwsim_phys_lock);
+			return 0;
+		}
+	}
+	rcu_read_unlock();
+
+	kfree(einfo);
+	mutex_unlock(&hwsim_phys_lock);
+
+	return -ENOENT;
+}
+
+/* MAC802154_HWSIM netlink policy */
+
+static const struct nla_policy hwsim_genl_policy[MAC802154_HWSIM_ATTR_MAX + 1] = {
+	[MAC802154_HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
+	[MAC802154_HWSIM_ATTR_RADIO_EDGE] = { .type = NLA_NESTED },
+	[MAC802154_HWSIM_ATTR_RADIO_EDGES] = { .type = NLA_NESTED },
+};
+
+/* Generic Netlink operations array */
+static const struct genl_small_ops hwsim_nl_ops[] = {
+	{
+		.cmd = MAC802154_HWSIM_CMD_NEW_RADIO,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_new_radio_nl,
+		.flags = GENL_UNS_ADMIN_PERM,
+	},
+	{
+		.cmd = MAC802154_HWSIM_CMD_DEL_RADIO,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_del_radio_nl,
+		.flags = GENL_UNS_ADMIN_PERM,
+	},
+	{
+		.cmd = MAC802154_HWSIM_CMD_GET_RADIO,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_get_radio_nl,
+		.dumpit = hwsim_dump_radio_nl,
+	},
+	{
+		.cmd = MAC802154_HWSIM_CMD_NEW_EDGE,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_new_edge_nl,
+		.flags = GENL_UNS_ADMIN_PERM,
+	},
+	{
+		.cmd = MAC802154_HWSIM_CMD_DEL_EDGE,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_del_edge_nl,
+		.flags = GENL_UNS_ADMIN_PERM,
+	},
+	{
+		.cmd = MAC802154_HWSIM_CMD_SET_EDGE,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
+		.doit = hwsim_set_edge_lqi,
+		.flags = GENL_UNS_ADMIN_PERM,
+	},
+};
+
+static struct genl_family hwsim_genl_family __ro_after_init = {
+	.name = "MAC802154_HWSIM",
+	.version = 1,
+	.maxattr = MAC802154_HWSIM_ATTR_MAX,
+	.policy = hwsim_genl_policy,
+	.module = THIS_MODULE,
+	.small_ops = hwsim_nl_ops,
+	.n_small_ops = ARRAY_SIZE(hwsim_nl_ops),
+	.resv_start_op = MAC802154_HWSIM_CMD_NEW_EDGE + 1,
+	.mcgrps = hwsim_mcgrps,
+	.n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
+};
+
+static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
+				   struct genl_info *info)
+{
+	if (info)
+		genl_notify(&hwsim_genl_family, mcast_skb, info,
+			    HWSIM_MCGRP_CONFIG, GFP_KERNEL);
+	else
+		genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
+				  HWSIM_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+static void hwsim_mcast_new_radio(struct genl_info *info, struct hwsim_phy *phy)
+{
+	struct sk_buff *mcast_skb;
+	void *data;
+
+	mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!mcast_skb)
+		return;
+
+	data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
+			   MAC802154_HWSIM_CMD_NEW_RADIO);
+	if (!data)
+		goto out_err;
+
+	if (append_radio_msg(mcast_skb, phy) < 0)
+		goto out_err;
+
+	genlmsg_end(mcast_skb, data);
+
+	hwsim_mcast_config_msg(mcast_skb, info);
+	return;
+
+out_err:
+	genlmsg_cancel(mcast_skb, data);
+	nlmsg_free(mcast_skb);
+}
+
+static void hwsim_edge_unsubscribe_me(struct hwsim_phy *phy)
+{
+	struct hwsim_phy *tmp;
+	struct hwsim_edge *e;
+
+	rcu_read_lock();
+	/* going to all phy edges and remove phy from it */
+	list_for_each_entry(tmp, &hwsim_phys, list) {
+		list_for_each_entry_rcu(e, &tmp->edges, list) {
+			if (e->endpoint->idx == phy->idx) {
+				list_del_rcu(&e->list);
+				hwsim_free_edge(e);
+			}
+		}
+	}
+	rcu_read_unlock();
+
+	synchronize_rcu();
+}
+
+static int hwsim_subscribe_all_others(struct hwsim_phy *phy)
+{
+	struct hwsim_phy *sub;
+	struct hwsim_edge *e;
+
+	list_for_each_entry(sub, &hwsim_phys, list) {
+		e = hwsim_alloc_edge(sub, 0xff);
+		if (!e)
+			goto me_fail;
+
+		list_add_rcu(&e->list, &phy->edges);
+	}
+
+	list_for_each_entry(sub, &hwsim_phys, list) {
+		e = hwsim_alloc_edge(phy, 0xff);
+		if (!e)
+			goto sub_fail;
+
+		list_add_rcu(&e->list, &sub->edges);
+	}
+
+	return 0;
+
+sub_fail:
+	hwsim_edge_unsubscribe_me(phy);
+me_fail:
+	rcu_read_lock();
+	list_for_each_entry_rcu(e, &phy->edges, list) {
+		list_del_rcu(&e->list);
+		hwsim_free_edge(e);
+	}
+	rcu_read_unlock();
+	return -ENOMEM;
+}
+
+static int hwsim_add_one(struct genl_info *info, struct device *dev,
+			 bool init)
+{
+	struct ieee802154_hw *hw;
+	struct hwsim_phy *phy;
+	struct hwsim_pib *pib;
+	int idx;
+	int err;
+
+	idx = hwsim_radio_idx++;
+
+	hw = ieee802154_alloc_hw(sizeof(*phy), &hwsim_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);
+
+	/* hwsim phy channel 13 as default */
+	hw->phy->current_channel = 13;
+	pib = kzalloc(sizeof(*pib), GFP_KERNEL);
+	if (!pib) {
+		err = -ENOMEM;
+		goto err_pib;
+	}
+
+	pib->channel = 13;
+	rcu_assign_pointer(phy->pib, pib);
+	phy->idx = idx;
+	INIT_LIST_HEAD(&phy->edges);
+
+	hw->flags = IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_RX_DROP_BAD_CKSUM;
+	hw->parent = dev;
+
+	err = ieee802154_register_hw(hw);
+	if (err)
+		goto err_reg;
+
+	mutex_lock(&hwsim_phys_lock);
+	if (init) {
+		err = hwsim_subscribe_all_others(phy);
+		if (err < 0) {
+			mutex_unlock(&hwsim_phys_lock);
+			goto err_subscribe;
+		}
+	}
+	list_add_tail(&phy->list, &hwsim_phys);
+	mutex_unlock(&hwsim_phys_lock);
+
+	hwsim_mcast_new_radio(info, phy);
+
+	return idx;
+
+err_subscribe:
+	ieee802154_unregister_hw(phy->hw);
+err_reg:
+	kfree(pib);
+err_pib:
+	ieee802154_free_hw(phy->hw);
+	return err;
+}
+
+static void hwsim_del(struct hwsim_phy *phy)
+{
+	struct hwsim_pib *pib;
+	struct hwsim_edge *e;
+
+	hwsim_edge_unsubscribe_me(phy);
+
+	list_del(&phy->list);
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(e, &phy->edges, list) {
+		list_del_rcu(&e->list);
+		hwsim_free_edge(e);
+	}
+	pib = rcu_dereference(phy->pib);
+	rcu_read_unlock();
+
+	kfree_rcu(pib, rcu);
+
+	ieee802154_unregister_hw(phy->hw);
+	ieee802154_free_hw(phy->hw);
+}
+
+static int hwsim_probe(struct platform_device *pdev)
+{
+	struct hwsim_phy *phy, *tmp;
+	int err, i;
+
+	for (i = 0; i < 2; i++) {
+		err = hwsim_add_one(NULL, &pdev->dev, true);
+		if (err < 0)
+			goto err_slave;
+	}
+
+	dev_info(&pdev->dev, "Added 2 mac802154 hwsim hardware radios\n");
+	return 0;
+
+err_slave:
+	mutex_lock(&hwsim_phys_lock);
+	list_for_each_entry_safe(phy, tmp, &hwsim_phys, list)
+		hwsim_del(phy);
+	mutex_unlock(&hwsim_phys_lock);
+	return err;
+}
+
+static int hwsim_remove(struct platform_device *pdev)
+{
+	struct hwsim_phy *phy, *tmp;
+
+	mutex_lock(&hwsim_phys_lock);
+	list_for_each_entry_safe(phy, tmp, &hwsim_phys, list)
+		hwsim_del(phy);
+	mutex_unlock(&hwsim_phys_lock);
+
+	return 0;
+}
+
+static struct platform_driver mac802154hwsim_driver = {
+	.probe = hwsim_probe,
+	.remove = hwsim_remove,
+	.driver = {
+			.name = "mac802154_hwsim",
+	},
+};
+
+static __init int hwsim_init_module(void)
+{
+	int rc;
+
+	rc = genl_register_family(&hwsim_genl_family);
+	if (rc)
+		return rc;
+
+	mac802154hwsim_dev = platform_device_register_simple("mac802154_hwsim",
+							     -1, NULL, 0);
+	if (IS_ERR(mac802154hwsim_dev)) {
+		rc = PTR_ERR(mac802154hwsim_dev);
+		goto platform_dev;
+	}
+
+	rc = platform_driver_register(&mac802154hwsim_driver);
+	if (rc < 0)
+		goto platform_drv;
+
+	return 0;
+
+platform_drv:
+	platform_device_unregister(mac802154hwsim_dev);
+platform_dev:
+	genl_unregister_family(&hwsim_genl_family);
+	return rc;
+}
+
+static __exit void hwsim_remove_module(void)
+{
+	genl_unregister_family(&hwsim_genl_family);
+	platform_driver_unregister(&mac802154hwsim_driver);
+	platform_device_unregister(mac802154hwsim_dev);
+}
+
+module_init(hwsim_init_module);
+module_exit(hwsim_remove_module);