Beispiel #1
0
int ieee80211_register_hw(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);
	int result, i;
	enum ieee80211_band band;
	int channels, max_bitrates;
	bool supp_ht;
	static const u32 cipher_suites[] = {
		/* keep WEP first, it may be removed below */
		WLAN_CIPHER_SUITE_WEP40,
		WLAN_CIPHER_SUITE_WEP104,
		WLAN_CIPHER_SUITE_TKIP,
		WLAN_CIPHER_SUITE_CCMP,

		/* keep last -- depends on hw flags! */
		WLAN_CIPHER_SUITE_AES_CMAC
	};

	if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns)
#ifdef CONFIG_PM
	    && (!local->ops->suspend || !local->ops->resume)
#endif
	    )
		return -EINVAL;

	if (hw->max_report_rates == 0)
		hw->max_report_rates = hw->max_rates;

	/*
	 * generic code guarantees at least one band,
	 * set this very early because much code assumes
	 * that hw.conf.channel is assigned
	 */
	channels = 0;
	max_bitrates = 0;
	supp_ht = false;
	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		struct ieee80211_supported_band *sband;

		sband = local->hw.wiphy->bands[band];
		if (!sband)
			continue;
		if (!local->oper_channel) {
			/* init channel we're on */
			local->hw.conf.channel =
			local->oper_channel = &sband->channels[0];
			local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
		}
		channels += sband->n_channels;

		if (max_bitrates < sband->n_bitrates)
			max_bitrates = sband->n_bitrates;
		supp_ht = supp_ht || sband->ht_cap.ht_supported;
	}

	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
				      sizeof(void *) * channels, GFP_KERNEL);
	if (!local->int_scan_req)
		return -ENOMEM;

	/* if low-level driver supports AP, we also support VLAN */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
		hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
	}

	/* mac80211 always supports monitor */
	hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
	hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);

	/*
	 * mac80211 doesn't support more than 1 channel, and also not more
	 * than one IBSS interface
	 */
	for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
		const struct ieee80211_iface_combination *c;
		int j;

		c = &hw->wiphy->iface_combinations[i];

		if (c->num_different_channels > 1)
			return -EINVAL;

		for (j = 0; j < c->n_limits; j++)
			if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
			    c->limits[j].max > 1)
				return -EINVAL;
	}

#ifndef CONFIG_MAC80211_MESH
	/* mesh depends on Kconfig, but drivers should set it if they want */
	local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
#endif

	/* if the underlying driver supports mesh, mac80211 will (at least)
	 * provide routing of mesh authentication frames to userspace */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
		local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;

	/* mac80211 supports control port protocol changing */
	local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;

	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;

	WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
	     && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");

	/*
	 * Calculate scan IE length -- we need this to alloc
	 * memory and to subtract from the driver limit. It
	 * includes the DS Params, (extended) supported rates, and HT
	 * information -- SSID is the driver's responsibility.
	 */
	local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
		3 /* DS Params */;
	if (supp_ht)
		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);

	if (!local->ops->hw_scan) {
		/* For hw_scan, driver needs to set these up. */
		local->hw.wiphy->max_scan_ssids = 4;
		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
	}

	/*
	 * If the driver supports any scan IEs, then assume the
	 * limit includes the IEs mac80211 will add, otherwise
	 * leave it at zero and let the driver sort it out; we
	 * still pass our IEs to the driver but userspace will
	 * not be allowed to in that case.
	 */
	if (local->hw.wiphy->max_scan_ie_len)
		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;

	/* Set up cipher suites unless driver already did */
	if (!local->hw.wiphy->cipher_suites) {
		local->hw.wiphy->cipher_suites = cipher_suites;
		local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
		if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
			local->hw.wiphy->n_cipher_suites--;
	}
	if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) {
		if (local->hw.wiphy->cipher_suites == cipher_suites) {
			local->hw.wiphy->cipher_suites += 2;
			local->hw.wiphy->n_cipher_suites -= 2;
		} else {
			u32 *suites;
			int r, w = 0;

			/* Filter out WEP */

			suites = kmemdup(
				local->hw.wiphy->cipher_suites,
				sizeof(u32) * local->hw.wiphy->n_cipher_suites,
				GFP_KERNEL);
			if (!suites)
				return -ENOMEM;
			for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
				u32 suite = local->hw.wiphy->cipher_suites[r];
				if (suite == WLAN_CIPHER_SUITE_WEP40 ||
				    suite == WLAN_CIPHER_SUITE_WEP104)
					continue;
				suites[w++] = suite;
			}
			local->hw.wiphy->cipher_suites = suites;
			local->hw.wiphy->n_cipher_suites = w;
			local->wiphy_ciphers_allocated = true;
		}
	}

	if (!local->ops->remain_on_channel)
		local->hw.wiphy->max_remain_on_channel_duration = 5000;

	if (local->ops->sched_scan_start)
		local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;

	result = wiphy_register(local->hw.wiphy);
	if (result < 0)
		goto fail_wiphy_register;

	/*
	 * We use the number of queues for feature tests (QoS, HT) internally
	 * so restrict them appropriately.
	 */
	if (hw->queues > IEEE80211_MAX_QUEUES)
		hw->queues = IEEE80211_MAX_QUEUES;

	local->workqueue =
		alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0);
	if (!local->workqueue) {
		result = -ENOMEM;
		goto fail_workqueue;
	}

	/*
	 * The hardware needs headroom for sending the frame,
	 * and we need some headroom for passing the frame to monitor
	 * interfaces, but never both at the same time.
	 */
#ifndef __CHECKER__
	BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
			sizeof(struct ieee80211_tx_status_rtap_hdr));
#endif
	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
				   sizeof(struct ieee80211_tx_status_rtap_hdr));

	debugfs_hw_add(local);

	/*
	 * if the driver doesn't specify a max listen interval we
	 * use 5 which should be a safe default
	 */
	if (local->hw.max_listen_interval == 0)
		local->hw.max_listen_interval = 5;

	local->hw.conf.listen_interval = local->hw.max_listen_interval;

	local->dynamic_ps_forced_timeout = -1;

	result = ieee80211_wep_init(local);
	if (result < 0)
		wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n",
			    result);

	rtnl_lock();

	result = ieee80211_init_rate_ctrl_alg(local,
					      hw->rate_control_algorithm);
	if (result < 0) {
		wiphy_debug(local->hw.wiphy,
			    "Failed to initialize rate control algorithm\n");
		goto fail_rate;
	}

	/* add one default STA interface if supported */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
		result = ieee80211_if_add(local, "wlan%d", NULL,
					  NL80211_IFTYPE_STATION, NULL);
		if (result)
			wiphy_warn(local->hw.wiphy,
				   "Failed to add default virtual iface\n");
	}

	rtnl_unlock();

	ieee80211_led_init(local);

	local->network_latency_notifier.notifier_call =
		ieee80211_max_network_latency;
	result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
				     &local->network_latency_notifier);
	if (result) {
		rtnl_lock();
		goto fail_pm_qos;
	}

#ifdef CONFIG_INET
	local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
	result = register_inetaddr_notifier(&local->ifa_notifier);
	if (result)
		goto fail_ifa;
#endif

	netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll,
			local->hw.napi_weight);

	return 0;

#ifdef CONFIG_INET
 fail_ifa:
	pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
			       &local->network_latency_notifier);
	rtnl_lock();
#endif
 fail_pm_qos:
	ieee80211_led_exit(local);
	ieee80211_remove_interfaces(local);
 fail_rate:
	rtnl_unlock();
	ieee80211_wep_free(local);
	sta_info_stop(local);
	destroy_workqueue(local->workqueue);
 fail_workqueue:
	wiphy_unregister(local->hw.wiphy);
 fail_wiphy_register:
	if (local->wiphy_ciphers_allocated)
		kfree(local->hw.wiphy->cipher_suites);
	kfree(local->int_scan_req);
	return result;
}
Beispiel #2
0
int ieee80211_register_hw(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);
	int result;
	enum ieee80211_band band;
	int channels, max_bitrates;
	bool supp_ht;
	static const u32 cipher_suites[] = {
		WLAN_CIPHER_SUITE_WEP40,
		WLAN_CIPHER_SUITE_WEP104,
		WLAN_CIPHER_SUITE_TKIP,
		WLAN_CIPHER_SUITE_CCMP,

		/* keep last -- depends on hw flags! */
		WLAN_CIPHER_SUITE_AES_CMAC
	};

	/*
	 * generic code guarantees at least one band,
	 * set this very early because much code assumes
	 * that hw.conf.channel is assigned
	 */
	channels = 0;
	max_bitrates = 0;
	supp_ht = false;
	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		struct ieee80211_supported_band *sband;

		sband = local->hw.wiphy->bands[band];
		if (!sband)
			continue;
		if (!local->oper_channel) {
			/* init channel we're on */
			local->hw.conf.channel =
			local->oper_channel = &sband->channels[0];
			local->hw.conf.channel_type = NL80211_CHAN_NO_HT;
		}
		channels += sband->n_channels;

		if (max_bitrates < sband->n_bitrates)
			max_bitrates = sband->n_bitrates;
		supp_ht = supp_ht || sband->ht_cap.ht_supported;
	}

	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
				      sizeof(void *) * channels, GFP_KERNEL);
	if (!local->int_scan_req)
		return -ENOMEM;

	/* if low-level driver supports AP, we also support VLAN */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP))
		local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);

	/* mac80211 always supports monitor */
	local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);

	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
	else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;

	WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
	     && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");

	/*
	 * Calculate scan IE length -- we need this to alloc
	 * memory and to subtract from the driver limit. It
	 * includes the (extended) supported rates and HT
	 * information -- SSID is the driver's responsibility.
	 */
	local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */
	if (supp_ht)
		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);

	if (!local->ops->hw_scan) {
		/* For hw_scan, driver needs to set these up. */
		local->hw.wiphy->max_scan_ssids = 4;
		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
	}

	/*
	 * If the driver supports any scan IEs, then assume the
	 * limit includes the IEs mac80211 will add, otherwise
	 * leave it at zero and let the driver sort it out; we
	 * still pass our IEs to the driver but userspace will
	 * not be allowed to in that case.
	 */
	if (local->hw.wiphy->max_scan_ie_len)
		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;

	local->hw.wiphy->cipher_suites = cipher_suites;
	local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
	if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE))
		local->hw.wiphy->n_cipher_suites--;

	result = wiphy_register(local->hw.wiphy);
	if (result < 0)
		goto fail_wiphy_register;

	/*
	 * We use the number of queues for feature tests (QoS, HT) internally
	 * so restrict them appropriately.
	 */
	if (hw->queues > IEEE80211_MAX_QUEUES)
		hw->queues = IEEE80211_MAX_QUEUES;

	local->workqueue =
		create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
	if (!local->workqueue) {
		result = -ENOMEM;
		goto fail_workqueue;
	}

	/*
	 * The hardware needs headroom for sending the frame,
	 * and we need some headroom for passing the frame to monitor
	 * interfaces, but never both at the same time.
	 */
	BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM !=
			sizeof(struct ieee80211_tx_status_rtap_hdr));
	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
				   sizeof(struct ieee80211_tx_status_rtap_hdr));

	debugfs_hw_add(local);

	/*
	 * if the driver doesn't specify a max listen interval we
	 * use 5 which should be a safe default
	 */
	if (local->hw.max_listen_interval == 0)
		local->hw.max_listen_interval = 5;

	local->hw.conf.listen_interval = local->hw.max_listen_interval;

	local->dynamic_ps_forced_timeout = -1;

	result = sta_info_start(local);
	if (result < 0)
		goto fail_sta_info;

	result = ieee80211_wep_init(local);
	if (result < 0)
		printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n",
		       wiphy_name(local->hw.wiphy), result);

	rtnl_lock();

	result = ieee80211_init_rate_ctrl_alg(local,
					      hw->rate_control_algorithm);
	if (result < 0) {
		printk(KERN_DEBUG "%s: Failed to initialize rate control "
		       "algorithm\n", wiphy_name(local->hw.wiphy));
		goto fail_rate;
	}

	/* add one default STA interface if supported */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
		result = ieee80211_if_add(local, "wlan%d", NULL,
					  NL80211_IFTYPE_STATION, NULL);
		if (result)
			printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
			       wiphy_name(local->hw.wiphy));
	}

	rtnl_unlock();

	ieee80211_led_init(local);

	local->network_latency_notifier.notifier_call =
		ieee80211_max_network_latency;
	result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
				     &local->network_latency_notifier);
	if (result) {
		rtnl_lock();
		goto fail_pm_qos;
	}

#ifdef CONFIG_INET
	local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
	result = register_inetaddr_notifier(&local->ifa_notifier);
	if (result)
		goto fail_ifa;
#endif

	return 0;

#ifdef CONFIG_INET
 fail_ifa:
	pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
			       &local->network_latency_notifier);
	rtnl_lock();
#endif
 fail_pm_qos:
	ieee80211_led_exit(local);
	ieee80211_remove_interfaces(local);
 fail_rate:
	rtnl_unlock();
	ieee80211_wep_free(local);
	sta_info_stop(local);
 fail_sta_info:
	destroy_workqueue(local->workqueue);
 fail_workqueue:
	wiphy_unregister(local->hw.wiphy);
 fail_wiphy_register:
	kfree(local->int_scan_req);
	return result;
}