drivers/net/wireless/intel/iwlwifi/mvm/vendor-cmd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2021 Intel Corporation
 */
#include "mvm.h"
#include <linux/nl80211-vnd-intel.h>
#include <net/netlink.h>

static const struct nla_policy
iwl_mvm_vendor_attr_policy[NUM_IWL_MVM_VENDOR_ATTR] = {
	[IWL_MVM_VENDOR_ATTR_ROAMING_FORBIDDEN] = { .type = NLA_U8 },
	[IWL_MVM_VENDOR_ATTR_AUTH_MODE] = { .type = NLA_U32 },
	[IWL_MVM_VENDOR_ATTR_CHANNEL_NUM] = { .type = NLA_U8 },
	[IWL_MVM_VENDOR_ATTR_SSID] = { .type = NLA_BINARY,
				       .len = IEEE80211_MAX_SSID_LEN },
	[IWL_MVM_VENDOR_ATTR_BAND] = { .type = NLA_U8 },
	[IWL_MVM_VENDOR_ATTR_COLLOC_CHANNEL] = { .type = NLA_U8 },
	[IWL_MVM_VENDOR_ATTR_COLLOC_ADDR] = { .type = NLA_BINARY, .len = ETH_ALEN },
};

static int iwl_mvm_vendor_get_csme_conn_info(struct wiphy *wiphy,
					     struct wireless_dev *wdev,
					     const void *data, int data_len)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_csme_conn_info *csme_conn_info;
	struct sk_buff *skb;
	int err = 0;

	mutex_lock(&mvm->mutex);
	csme_conn_info = iwl_mvm_get_csme_conn_info(mvm);

	if (!csme_conn_info) {
		err = -EINVAL;
		goto out_unlock;
	}

	skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, 200);
	if (!skb) {
		err = -ENOMEM;
		goto out_unlock;
	}

	if (nla_put_u32(skb, IWL_MVM_VENDOR_ATTR_AUTH_MODE,
			csme_conn_info->conn_info.auth_mode) ||
	    nla_put(skb, IWL_MVM_VENDOR_ATTR_SSID,
		    csme_conn_info->conn_info.ssid_len,
		    csme_conn_info->conn_info.ssid) ||
	    nla_put_u32(skb, IWL_MVM_VENDOR_ATTR_STA_CIPHER,
			csme_conn_info->conn_info.pairwise_cipher) ||
	    nla_put_u8(skb, IWL_MVM_VENDOR_ATTR_CHANNEL_NUM,
		       csme_conn_info->conn_info.channel) ||
	    nla_put(skb, IWL_MVM_VENDOR_ATTR_ADDR, ETH_ALEN,
		    csme_conn_info->conn_info.bssid)) {
		kfree_skb(skb);
		err = -ENOBUFS;
	}

out_unlock:
	mutex_unlock(&mvm->mutex);
	if (err)
		return err;

	return cfg80211_vendor_cmd_reply(skb);
}

static int iwl_mvm_vendor_host_get_ownership(struct wiphy *wiphy,
					     struct wireless_dev *wdev,
					     const void *data, int data_len)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	mutex_lock(&mvm->mutex);
	ret = iwl_mvm_mei_get_ownership(mvm);
	mutex_unlock(&mvm->mutex);

	return ret;
}

static const struct wiphy_vendor_command iwl_mvm_vendor_commands[] = {
	{
		.info = {
			.vendor_id = INTEL_OUI,
			.subcmd = IWL_MVM_VENDOR_CMD_GET_CSME_CONN_INFO,
		},
		.doit = iwl_mvm_vendor_get_csme_conn_info,
		.flags = WIPHY_VENDOR_CMD_NEED_WDEV,
		.policy = iwl_mvm_vendor_attr_policy,
		.maxattr = MAX_IWL_MVM_VENDOR_ATTR,
	},
	{
		.info = {
			.vendor_id = INTEL_OUI,
			.subcmd = IWL_MVM_VENDOR_CMD_HOST_GET_OWNERSHIP,
		},
		.doit = iwl_mvm_vendor_host_get_ownership,
		.flags = WIPHY_VENDOR_CMD_NEED_WDEV,
		.policy = iwl_mvm_vendor_attr_policy,
		.maxattr = MAX_IWL_MVM_VENDOR_ATTR,
	},
};

enum iwl_mvm_vendor_events_idx {
        /* 0x0 - 0x3 are deprecated */
        IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN = 4,
        NUM_IWL_MVM_VENDOR_EVENT_IDX
};

static const struct nl80211_vendor_cmd_info
iwl_mvm_vendor_events[NUM_IWL_MVM_VENDOR_EVENT_IDX] = {
	[IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN] = {
		.vendor_id = INTEL_OUI,
		.subcmd = IWL_MVM_VENDOR_CMD_ROAMING_FORBIDDEN_EVENT,
	},
};

void iwl_mvm_vendor_cmds_register(struct iwl_mvm *mvm)
{
	mvm->hw->wiphy->vendor_commands = iwl_mvm_vendor_commands;
	mvm->hw->wiphy->n_vendor_commands = ARRAY_SIZE(iwl_mvm_vendor_commands);
	mvm->hw->wiphy->vendor_events = iwl_mvm_vendor_events;
	mvm->hw->wiphy->n_vendor_events = ARRAY_SIZE(iwl_mvm_vendor_events);
}

void iwl_mvm_send_roaming_forbidden_event(struct iwl_mvm *mvm,
					  struct ieee80211_vif *vif,
					  bool forbidden)
{
	struct sk_buff *msg =
		cfg80211_vendor_event_alloc(mvm->hw->wiphy,
					    ieee80211_vif_to_wdev(vif),
					    200, IWL_MVM_VENDOR_EVENT_IDX_ROAMING_FORBIDDEN,
					    GFP_ATOMIC);
	if (!msg)
		return;

	if (WARN_ON(!vif))
		return;

	if (nla_put(msg, IWL_MVM_VENDOR_ATTR_VIF_ADDR,
		    ETH_ALEN, vif->addr) ||
	    nla_put_u8(msg, IWL_MVM_VENDOR_ATTR_ROAMING_FORBIDDEN, forbidden))
		goto nla_put_failure;

	cfg80211_vendor_event(msg, GFP_ATOMIC);
	return;

 nla_put_failure:
	kfree_skb(msg);
}