brcmfmac: add support for P2P listen mode. (0de8aace) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/net/wireless/brcm80211/brcmfmac/dhd.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -452,6 +452,19 @@ struct brcmf_sta_info_le {
		__le32 rx_decrypt_failures; /* # of packet decrypted failed */
		};

		/*
		* WLC_E_PROBRESP_MSG
		* WLC_E_P2P_PROBREQ_MSG
		* WLC_E_ACTION_FRAME_RX
		*/
		struct brcmf_rx_mgmt_data {
		__be16 version;
		__be16 chanspec;
		__be32 rssi;
		__be32 mactime;
		__be32 rate;
		};

		/* Bus independent dongle command */
		struct brcmf_dcmd {
		uint cmd; /* common dongle cmd definition */

drivers/net/wireless/brcm80211/brcmfmac/fweh.h

+5 −1

Original line number	Diff line number	Diff line
		@@ -83,6 +83,7 @@ struct brcmf_event;
		BRCMF_ENUM_DEF(MULTICAST_DECODE_ERROR, 51) \
		BRCMF_ENUM_DEF(TRACE, 52) \
		BRCMF_ENUM_DEF(IF, 54) \
		BRCMF_ENUM_DEF(P2P_DISC_LISTEN_COMPLETE, 55) \
		BRCMF_ENUM_DEF(RSSI, 56) \
		BRCMF_ENUM_DEF(PFN_SCAN_COMPLETE, 57) \
		BRCMF_ENUM_DEF(EXTLOG_MSG, 58) \
		@@ -96,8 +97,11 @@ struct brcmf_event;
		BRCMF_ENUM_DEF(DFS_AP_RESUME, 66) \
		BRCMF_ENUM_DEF(ESCAN_RESULT, 69) \
		BRCMF_ENUM_DEF(ACTION_FRAME_OFF_CHAN_COMPLETE, 70) \
		BRCMF_ENUM_DEF(PROBERESP_MSG, 71) \
		BRCMF_ENUM_DEF(P2P_PROBEREQ_MSG, 72) \
		BRCMF_ENUM_DEF(DCS_REQUEST, 73) \
		BRCMF_ENUM_DEF(FIFO_CREDIT_MAP, 74)
		BRCMF_ENUM_DEF(FIFO_CREDIT_MAP, 74) \
		BRCMF_ENUM_DEF(ACTION_FRAME_RX, 75)

		#define BRCMF_ENUM_DEF(id, val) \
		BRCMF_E_##id = (val),

drivers/net/wireless/brcm80211/brcmfmac/p2p.c

+124 −26

Original line number	Diff line number	Diff line
		@@ -318,11 +318,6 @@ static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
		brcmf_dbg(TRACE, "enter\n");

		bss_dev = &p2p->bss_idx[P2PAPI_BSSCFG_DEVICE];
		if (bss_dev->vif == NULL) {
		brcmf_err("do nothing, not initialized\n");
		return -EINVAL;
		}

		ifp = bss_dev->vif->ifp;

		/* Set the discovery state to SCAN */
		@@ -348,8 +343,7 @@ static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
		*
		* Initializes the discovery device and configure the virtual interface.
		*/
		static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p,
		const u8 *ie, u32 ie_len)
		static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
		{
		struct brcmf_cfg80211_vif *vif;
		s32 ret = 0;
		@@ -357,9 +351,8 @@ static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p,
		brcmf_dbg(TRACE, "enter\n");
		vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
		if (vif) {
		brcmf_dbg(INFO,
		"DISCOVERY init already done, just process IE\n");
		goto set_ie;
		brcmf_dbg(INFO, "DISCOVERY init already done\n");
		goto exit;
		}

		ret = brcmf_p2p_init_discovery(p2p);
		@@ -380,20 +373,36 @@ static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p,
		if (ret < 0)
		brcmf_err("wsec error %d\n", ret);

		set_ie:
		if (ie_len) {
		ret = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
		ie, ie_len);

		if (ret < 0) {
		brcmf_err("set probreq ie occurs error %d\n", ret);
		goto exit;
		}
		}
		exit:
		return ret;
		}

		/**
		* brcmf_p2p_configure_probereq() - Configure probe request data.
		*
		* @p2p: P2P specific data.
		* @ie: buffer containing information elements.
		* @ie_len: length of @ie buffer.
		*
		*/
		static int brcmf_p2p_configure_probereq(struct brcmf_p2p_info *p2p,
		const u8 *ie, u32 ie_len)
		{
		struct brcmf_cfg80211_vif *vif;
		s32 err = 0;

		brcmf_dbg(TRACE, "enter\n");
		vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;

		err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
		ie, ie_len);

		if (err < 0)
		brcmf_err("set probreq ie occurs error %d\n", err);

		return err;
		}

		/*
		* brcmf_p2p_escan() - initiate a P2P scan.
		*
		@@ -420,9 +429,6 @@ static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
		struct brcmf_scan_params_le *sparams;
		struct brcmf_ssid ssid;

		/* add padding if uneven */
		if (num_chans % 2)
		memsize += sizeof(__le16);
		memsize += num_chans * sizeof(__le16);
		memblk = kzalloc(memsize, GFP_KERNEL);
		if (!memblk)
		@@ -639,7 +645,9 @@ int brcmf_p2p_scan_prep(struct wiphy *wiphy,
		clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
		brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");

		err = brcmf_p2p_enable_discovery(p2p, request->ie,
		err = brcmf_p2p_enable_discovery(p2p);
		if (err == 0)
		err = brcmf_p2p_configure_probereq(p2p, request->ie,
		request->ie_len);

		/*
		@@ -666,6 +674,92 @@ int brcmf_p2p_scan_prep(struct wiphy *wiphy,
		return err;
		}


		/**
		* brcmf_p2p_remain_on_channel() - put device on channel and stay there.
		*
		* @wiphy: wiphy device.
		* @channel: channel to stay on.
		* @duration: time in ms to remain on channel.
		*
		*/
		int brcmf_p2p_remain_on_channel(struct wiphy wiphy, struct wireless_dev wdev,
		struct ieee80211_channel *channel,
		unsigned int duration, u64 *cookie)
		{
		struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
		struct brcmf_p2p_info *p2p = &cfg->p2p;
		struct brcmf_cfg80211_vif *vif;
		s32 err;
		u16 chanspec;

		brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n",
		ieee80211_frequency_to_channel(channel->center_freq),
		duration);

		*cookie = 0;
		err = brcmf_p2p_enable_discovery(p2p);
		if (err)
		goto exit;

		chanspec = channel_to_chanspec(channel);
		vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
		err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
		chanspec, (u16)duration);
		if (err)
		goto exit;

		memcpy(&p2p->remain_on_channel, channel,
		sizeof(p2p->remain_on_channel));

		set_bit(BRCMF_P2P_STATUS_REMAIN_ON_CHANNEL, &p2p->status);

		exit:
		cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
		return err;
		}


		/**
		* brcmf_p2p_notify_listen_complete() - p2p listen has completed.
		*
		* @ifp: interfac control.
		* @e: event message. Not used, to make it usable for fweh event dispatcher.
		* @data: payload of message. Not used.
		*
		*/
		int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
		const struct brcmf_event_msg *e,
		void *data)
		{
		struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
		struct brcmf_p2p_info *p2p = &cfg->p2p;

		brcmf_dbg(TRACE, "Enter\n");
		if (test_and_clear_bit(BRCMF_P2P_STATUS_REMAIN_ON_CHANNEL,
		&p2p->status))
		cfg80211_remain_on_channel_expired(&ifp->vif->wdev, 0,
		&p2p->remain_on_channel,
		GFP_KERNEL);
		return 0;
		}


		/**
		* brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
		*
		* @ifp: interfac control.
		*
		*/
		void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
		{
		if (!ifp)
		return;
		brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
		brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
		}


		/**
		* brcmf_p2p_attach() - attach for P2P.
		*
		@@ -689,7 +783,11 @@ void brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg)
		*/
		void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
		{
		if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif != NULL) {
		brcmf_p2p_cancel_remain_on_channel(
		p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp);
		brcmf_p2p_deinit_discovery(p2p);
		}
		/* just set it all to zero */
		memset(p2p, 0, sizeof(*p2p));
		}

drivers/net/wireless/brcm80211/brcmfmac/p2p.h

+12 −3

Original line number	Diff line number	Diff line
		@@ -60,10 +60,10 @@ struct p2p_bss {
		* @BRCMF_P2P_STATUS_IF_DELETING: peer-to-peer vif delete sent to dongle.
		* @BRCMF_P2P_STATUS_IF_CHANGING: peer-to-peer vif change sent to dongle.
		* @BRCMF_P2P_STATUS_IF_CHANGED: peer-to-peer vif change completed on dongle.
		* @BRCMF_P2P_STATUS_LISTEN_EXPIRED: listen duration expired.
		* @BRCMF_P2P_STATUS_ACTION_TX_COMPLETED: action frame tx completed.
		* @BRCMF_P2P_STATUS_ACTION_TX_NOACK: action frame tx not acked.
		* @BRCMF_P2P_STATUS_GO_NEG_PHASE: P2P GO negotiation ongoing.
		* @BRCMF_P2P_STATUS_REMAIN_ON_CHANNEL: P2P listen, remaining on channel.
		*/
		enum brcmf_p2p_status {
		BRCMF_P2P_STATUS_IF_ADD = 0,
		@@ -71,10 +71,10 @@ enum brcmf_p2p_status {
		BRCMF_P2P_STATUS_IF_DELETING,
		BRCMF_P2P_STATUS_IF_CHANGING,
		BRCMF_P2P_STATUS_IF_CHANGED,
		BRCMF_P2P_STATUS_LISTEN_EXPIRED,
		BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
		BRCMF_P2P_STATUS_ACTION_TX_NOACK,
		BRCMF_P2P_STATUS_GO_NEG_PHASE
		BRCMF_P2P_STATUS_GO_NEG_PHASE,
		BRCMF_P2P_STATUS_REMAIN_ON_CHANNEL
		};

		/**
		@@ -88,6 +88,7 @@ enum brcmf_p2p_status {
		* @listen_timer: timer for @WL_P2P_DISC_ST_LISTEN discover state.
		* @ssid: ssid for P2P GO.
		* @listen_channel: channel for @WL_P2P_DISC_ST_LISTEN discover state.
		* @remain_on_channel: contains copy of struct used by cfg80211.
		*/
		struct brcmf_p2p_info {
		struct brcmf_cfg80211_info *cfg;
		@@ -98,6 +99,7 @@ struct brcmf_p2p_info {
		struct timer_list listen_timer;
		struct brcmf_ssid ssid;
		u8 listen_channel;
		struct ieee80211_channel remain_on_channel;
		};

		void brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg);
		@@ -110,5 +112,12 @@ int brcmf_p2p_start_device(struct wiphy wiphy, struct wireless_dev wdev);
		void brcmf_p2p_stop_device(struct wiphy wiphy, struct wireless_dev wdev);
		int brcmf_p2p_scan_prep(struct wiphy *wiphy,
		struct cfg80211_scan_request *request);
		int brcmf_p2p_remain_on_channel(struct wiphy wiphy, struct wireless_dev wdev,
		struct ieee80211_channel *channel,
		unsigned int duration, u64 *cookie);
		int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
		const struct brcmf_event_msg *e,
		void *data);
		void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp);

		#endif /* WL_CFGP2P_H_ */

drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c

+185 −4

Original line number	Diff line number	Diff line
		@@ -3359,6 +3359,11 @@ s32 brcmf_vif_set_mgmt_ie(struct brcmf_cfg80211_vif *vif, s32 pktflag,
		mgmt_ie_len = &saved_ie->probe_req_ie_len;
		mgmt_ie_buf_len = sizeof(saved_ie->probe_req_ie);
		break;
		case BRCMF_VNDR_IE_PRBRSP_FLAG:
		mgmt_ie_buf = saved_ie->probe_res_ie;
		mgmt_ie_len = &saved_ie->probe_res_ie_len;
		mgmt_ie_buf_len = sizeof(saved_ie->probe_res_ie);
		break;
		default:
		err = -EPERM;
		brcmf_err("not suitable type\n");
		@@ -3674,6 +3679,150 @@ brcmf_cfg80211_del_station(struct wiphy wiphy, struct net_device ndev,
		return err;
		}


		static void
		brcmf_cfg80211_mgmt_frame_register(struct wiphy *wiphy,
		struct wireless_dev *wdev,
		u16 frame_type, bool reg)
		{
		struct brcmf_if *ifp = netdev_priv(wdev->netdev);
		struct brcmf_cfg80211_vif *vif = ifp->vif;
		u16 mgmt_type;

		brcmf_dbg(TRACE, "Enter, frame_type %04x, reg=%d\n", frame_type, reg);

		mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
		if (reg)
		vif->mgmt_rx_reg \|= BIT(mgmt_type);
		else
		vif->mgmt_rx_reg \|= ~BIT(mgmt_type);
		}


		static int
		brcmf_cfg80211_mgmt_tx(struct wiphy wiphy, struct wireless_dev wdev,
		struct ieee80211_channel *chan, bool offchan,
		unsigned int wait, const u8 *buf, size_t len,
		bool no_cck, bool dont_wait_for_ack, u64 *cookie)
		{
		struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
		const struct ieee80211_mgmt *mgmt;
		struct brcmf_cfg80211_vif *vif;
		s32 err = 0;
		s32 ie_offset;
		s32 ie_len;

		brcmf_dbg(TRACE, "Enter\n");

		*cookie = 0;

		mgmt = (const struct ieee80211_mgmt *)buf;

		if (ieee80211_is_mgmt(mgmt->frame_control)) {
		if (ieee80211_is_probe_resp(mgmt->frame_control)) {
		/* Right now the only reason to get a probe response */
		/* is for p2p listen response from wpa_supplicant. */
		/* Unfortunately the wpa_supplicant sends it on the */
		/* primary ndev, while dongle wants it on the p2p */
		/* vif. Since this is only reason for a probe */
		/* response to be sent, the vif is taken from cfg. */
		/* If ever desired to send proberesp for non p2p */
		/* response then data should be checked for */
		/* "DIRECT-". Note in future supplicant will take */
		/* dedicated p2p wdev to do this and then this 'hack'*/
		/* is not needed anymore. */
		ie_offset = DOT11_MGMT_HDR_LEN +
		DOT11_BCN_PRB_FIXED_LEN;
		ie_len = len - ie_offset;

		vif = cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
		if (vif == NULL) {
		brcmf_err("No p2p device available for probe response\n");
		err = -ENODEV;
		goto exit;
		}
		err = brcmf_vif_set_mgmt_ie(vif,
		BRCMF_VNDR_IE_PRBRSP_FLAG,
		&buf[ie_offset],
		ie_len);
		cfg80211_mgmt_tx_status(wdev, *cookie, buf, len, true,
		GFP_KERNEL);
		goto exit;
		}
		}
		brcmf_dbg(TRACE, "Unhandled, is_mgmt %d, fc=%04x!!!!!\n",
		ieee80211_is_mgmt(mgmt->frame_control), mgmt->frame_control);
		exit:
		return err;
		}


		static int
		brcmf_cfg80211_cancel_remain_on_channel(struct wiphy *wiphy,
		struct wireless_dev *wdev,
		u64 cookie)
		{
		struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
		struct brcmf_cfg80211_vif *vif;
		int err = 0;

		brcmf_dbg(TRACE, "Enter p2p listen cancel\n");

		vif = cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
		if (vif == NULL) {
		brcmf_err("No p2p device available for probe response\n");
		err = -ENODEV;
		goto exit;
		}
		brcmf_p2p_cancel_remain_on_channel(vif->ifp);
		exit:
		return err;
		}

		static s32 brcmf_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
		const struct brcmf_event_msg *e,
		void *data)
		{
		struct wireless_dev *wdev;
		struct brcmf_cfg80211_vif *vif = ifp->vif;
		struct brcmf_rx_mgmt_data rxframe = (struct brcmf_rx_mgmt_data )data;
		u16 chanspec = be16_to_cpu(rxframe->chanspec);
		u8 *mgmt_frame;
		u32 mgmt_frame_len;
		s32 freq;
		u16 mgmt_type;

		brcmf_dbg(INFO,
		"Enter: event %d reason %d\n", e->event_code, e->reason);

		/* Firmware sends us two proberesponses for each idx one. At the */
		/* moment only bsscfgidx 0 is passed up to supplicant */
		if (e->bsscfgidx)
		return 0;

		/* Check if wpa_supplicant has registered for this frame */
		brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
		mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
		if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
		return 0;

		mgmt_frame = (u8 *)(rxframe + 1);
		mgmt_frame_len = e->datalen - sizeof(*rxframe);
		freq = ieee80211_channel_to_frequency(CHSPEC_CHANNEL(chanspec),
		CHSPEC_IS2G(chanspec) ?
		IEEE80211_BAND_2GHZ :
		IEEE80211_BAND_5GHZ);
		wdev = ifp->ndev->ieee80211_ptr;
		cfg80211_rx_mgmt(wdev, freq, 0, mgmt_frame, mgmt_frame_len, GFP_ATOMIC);

		brcmf_dbg(INFO,
		"mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
		mgmt_frame_len, e->datalen, chanspec, freq);

		return 0;
		}


		static struct cfg80211_ops wl_cfg80211_ops = {
		.add_virtual_intf = brcmf_cfg80211_add_iface,
		.del_virtual_intf = brcmf_cfg80211_del_iface,
		@@ -3703,6 +3852,10 @@ static struct cfg80211_ops wl_cfg80211_ops = {
		.del_station = brcmf_cfg80211_del_station,
		.sched_scan_start = brcmf_cfg80211_sched_scan_start,
		.sched_scan_stop = brcmf_cfg80211_sched_scan_stop,
		.mgmt_frame_register = brcmf_cfg80211_mgmt_frame_register,
		.mgmt_tx = brcmf_cfg80211_mgmt_tx,
		.remain_on_channel = brcmf_p2p_remain_on_channel,
		.cancel_remain_on_channel = brcmf_cfg80211_cancel_remain_on_channel,
		#ifdef CONFIG_NL80211_TESTMODE
		.testmode_cmd = brcmf_cfg80211_testmode
		#endif
		@@ -3765,6 +3918,30 @@ static const struct ieee80211_iface_combination brcmf_iface_combos[] = {
		}
		};

		static const struct ieee80211_txrx_stypes
		brcmf_txrx_stypes[NUM_NL80211_IFTYPES] = {
		[NL80211_IFTYPE_STATION] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) \|
		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
		},
		[NL80211_IFTYPE_P2P_CLIENT] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) \|
		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
		},
		[NL80211_IFTYPE_P2P_GO] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) \|
		BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) \|
		BIT(IEEE80211_STYPE_PROBE_REQ >> 4) \|
		BIT(IEEE80211_STYPE_DISASSOC >> 4) \|
		BIT(IEEE80211_STYPE_AUTH >> 4) \|
		BIT(IEEE80211_STYPE_DEAUTH >> 4) \|
		BIT(IEEE80211_STYPE_ACTION >> 4)
		}
		};

		static struct wiphy brcmf_setup_wiphy(struct device phydev)
		{
		struct wiphy *wiphy;
		@@ -3797,10 +3974,10 @@ static struct wiphy brcmf_setup_wiphy(struct device phydev)
		wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
		wiphy->cipher_suites = __wl_cipher_suites;
		wiphy->n_cipher_suites = ARRAY_SIZE(__wl_cipher_suites);
		wiphy->flags \|= WIPHY_FLAG_PS_ON_BY_DEFAULT; /* enable power
		* save mode
		* by default
		*/
		wiphy->flags \|= WIPHY_FLAG_PS_ON_BY_DEFAULT \|
		WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
		wiphy->mgmt_stypes = brcmf_txrx_stypes;
		wiphy->max_remain_on_channel_duration = 5000;
		brcmf_wiphy_pno_params(wiphy);
		err = wiphy_register(wiphy);
		if (err < 0) {
		@@ -4271,6 +4448,10 @@ static void brcmf_register_event_handlers(struct brcmf_cfg80211_info *cfg)
		brcmf_notify_sched_scan_results);
		brcmf_fweh_register(cfg->pub, BRCMF_E_IF,
		brcmf_notify_vif_event);
		brcmf_fweh_register(cfg->pub, BRCMF_E_P2P_PROBEREQ_MSG,
		brcmf_notify_rx_mgmt_p2p_probereq);
		brcmf_fweh_register(cfg->pub, BRCMF_E_P2P_DISC_LISTEN_COMPLETE,
		brcmf_p2p_notify_listen_complete);
		}

		static void brcmf_deinit_priv_mem(struct brcmf_cfg80211_info *cfg)