brcmfmac: P2P action frame tx.

With this patch it is possible to send action frames.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -20,6 +20,10 @@
 
 #include <linux/if_ether.h>
 
+
+#define BRCMF_FIL_ACTION_FRAME_SIZE	1800
+
+
 enum brcmf_fil_p2p_if_types {
 	BRCMF_FIL_P2P_IF_CLIENT,
 	BRCMF_FIL_P2P_IF_GO,
@@ -39,6 +43,21 @@ struct brcmf_fil_chan_info_le {
 	__le32 scan_channel;
 };
 
+struct brcmf_fil_action_frame_le {
+	u8	da[ETH_ALEN];
+	__le16	len;
+	__le32	packet_id;
+	u8	data[BRCMF_FIL_ACTION_FRAME_SIZE];
+};
+
+struct brcmf_fil_af_params_le {
+	__le32					channel;
+	__le32					dwell_time;
+	u8					bssid[ETH_ALEN];
+	u8					pad[2];
+	struct brcmf_fil_action_frame_le	action_frame;
+};
+
 struct brcmf_fil_bss_enable_le {
 	__le32 bsscfg_idx;
 	__le32 enable;

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

@@ -89,6 +89,8 @@ enum brcmf_p2p_status {
  * @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.
+ * @next_af_subtype: expected action frame subtype.
+ * @send_af_done: indication that action frame tx is complete.
  */
 struct brcmf_p2p_info {
 	struct brcmf_cfg80211_info *cfg;
@@ -100,6 +102,8 @@ struct brcmf_p2p_info {
 	struct brcmf_ssid ssid;
 	u8 listen_channel;
 	struct ieee80211_channel remain_on_channel;
+	u8 next_af_subtype;
+	struct completion send_af_done;
 };
 
 void brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg,
@@ -126,5 +130,11 @@ void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp);
 int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
 				     const struct brcmf_event_msg *e,
 				     void *data);
+int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
+					const struct brcmf_event_msg *e,
+					void *data);
+bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
+				 struct net_device *ndev,
+				 struct brcmf_fil_af_params_le *af_params);
 
 #endif /* WL_CFGP2P_H_ */

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

@@ -2494,7 +2494,7 @@ static s32 brcmf_update_bss_info(struct brcmf_cfg80211_info *cfg,
 	return err;
 }
 
-static void brcmf_abort_scanning(struct brcmf_cfg80211_info *cfg)
+void brcmf_abort_scanning(struct brcmf_cfg80211_info *cfg)
 {
 	struct escan_info *escan = &cfg->escan_info;
 
@@ -3949,6 +3949,10 @@ brcmf_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 	s32 err = 0;
 	s32 ie_offset;
 	s32 ie_len;
+	struct brcmf_fil_action_frame_le *action_frame;
+	struct brcmf_fil_af_params_le *af_params;
+	bool ack;
+	s32 chan_nr;
 
 	brcmf_dbg(TRACE, "Enter\n");
 
@@ -3986,11 +3990,44 @@ brcmf_cfg80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
 					    ie_len);
 		cfg80211_mgmt_tx_status(wdev, *cookie, buf, len, true,
 					GFP_KERNEL);
+	} else if (ieee80211_is_action(mgmt->frame_control)) {
+		af_params = kzalloc(sizeof(*af_params), GFP_KERNEL);
+		if (af_params == NULL) {
+			brcmf_err("unable to allocate frame\n");
+			err = -ENOMEM;
+			goto exit;
+		}
+		action_frame = &af_params->action_frame;
+		/* Add the packet Id */
+		action_frame->packet_id = cpu_to_le32(*cookie);
+		/* Add BSSID */
+		memcpy(&action_frame->da[0], &mgmt->da[0], ETH_ALEN);
+		memcpy(&af_params->bssid[0], &mgmt->bssid[0], ETH_ALEN);
+		/* Add the length exepted for 802.11 header  */
+		action_frame->len = cpu_to_le16(len - DOT11_MGMT_HDR_LEN);
+		/* Add the channel */
+		chan_nr = ieee80211_frequency_to_channel(chan->center_freq);
+		af_params->channel = cpu_to_le32(chan_nr);
+
+		memcpy(action_frame->data, &buf[DOT11_MGMT_HDR_LEN],
+		       le16_to_cpu(action_frame->len));
+
+		brcmf_dbg(TRACE, "Action frame, cookie=%lld, len=%d, freq=%d\n",
+			  *cookie, le16_to_cpu(action_frame->len),
+			  chan->center_freq);
+
+		ack = brcmf_p2p_send_action_frame(cfg, wdev->netdev,
+						  af_params);
+
+		cfg80211_mgmt_tx_status(wdev, *cookie, buf, len, ack,
+					GFP_KERNEL);
+		kfree(af_params);
 	} else {
 		brcmf_dbg(TRACE, "Unhandled, fc=%04x!!\n", mgmt->frame_control);
 		brcmf_dbg_hex_dump(true, buf, len, "payload, len=%Zu\n", len);
 	}
 
+exit:
 	return err;
 }
 
@@ -4703,6 +4740,8 @@ static void brcmf_register_event_handlers(struct brcmf_cfg80211_info *cfg)
 			    brcmf_p2p_notify_listen_complete);
 	brcmf_fweh_register(cfg->pub, BRCMF_E_ACTION_FRAME_RX,
 			    brcmf_p2p_notify_action_frame_rx);
+	brcmf_fweh_register(cfg->pub, BRCMF_E_ACTION_FRAME_COMPLETE,
+			    brcmf_p2p_notify_action_tx_complete);
 }
 
 static void brcmf_deinit_priv_mem(struct brcmf_cfg80211_info *cfg)

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

@@ -498,5 +498,6 @@ s32 brcmf_notify_escan_complete(struct brcmf_cfg80211_info *cfg,
 				struct net_device *ndev,
 				bool aborted, bool fw_abort);
 void brcmf_set_mpc(struct net_device *ndev, int mpc);
+void brcmf_abort_scanning(struct brcmf_cfg80211_info *cfg);
 
 #endif				/* _wl_cfg80211_h_ */