brcmfmac: P2P action frame tx.
authorHante Meuleman <meuleman@broadcom.com>
Fri, 8 Feb 2013 14:53:49 +0000 (15:53 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Fri, 8 Feb 2013 19:51:40 +0000 (14:51 -0500)
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
drivers/net/wireless/brcm80211/brcmfmac/p2p.c
drivers/net/wireless/brcm80211/brcmfmac/p2p.h
drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.h

index 2c4ca59..0f2c83b 100644 (file)
 
 #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;
index e5b1fb9..0c42910 100644 (file)
 #define P2P_OUI                        "\x50\x6F\x9A"  /* P2P OUI */
 #define P2P_OUI_LEN            3               /* P2P OUI length */
 
+/* Action Frame Constants */
+#define DOT11_ACTION_HDR_LEN   2       /* action frame category + action */
+#define DOT11_ACTION_CAT_OFF   0       /* category offset */
+#define DOT11_ACTION_ACT_OFF   1       /* action offset */
+
+#define P2P_AF_DWELL_TIME              200
+#define P2P_AF_MIN_DWELL_TIME          100
+#define P2P_AF_MED_DWELL_TIME          400
+#define P2P_AF_LONG_DWELL_TIME         1000
+#define P2P_AF_TX_MAX_RETRY            5
+#define P2P_AF_MAX_WAIT_TIME           2000
+#define P2P_INVALID_CHANNEL            -1
+#define P2P_CHANNEL_SYNC_RETRY         5
+#define P2P_AF_FRM_SCAN_MAX_WAIT       1500
+
 /* WiFi P2P Public Action Frame OUI Subtypes */
 #define P2P_PAF_GON_REQ                0       /* Group Owner Negotiation Req */
 #define P2P_PAF_GON_RSP                1       /* Group Owner Negotiation Rsp */
@@ -178,6 +193,17 @@ struct brcmf_p2psd_gas_pub_act_frame {
        u8      query_data[1];
 };
 
+/**
+ * struct brcmf_config_af_params - Action Frame Parameters for tx.
+ *
+ * @max_tx_retry: max tx retry count if tx no ack.
+ * @mpc_onoff: To make sure to send successfully action frame, we have to
+ *             turn off mpc  0: off, 1: on,  (-1): do nothing
+ */
+struct brcmf_config_af_params {
+       s32 max_tx_retry;
+       s32 mpc_onoff;
+};
 
 /**
  * brcmf_p2p_is_pub_action() - true if p2p public type frame.
@@ -590,8 +616,6 @@ static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
  * brcmf_p2p_enable_discovery() - initialize and configure discovery.
  *
  * @p2p: P2P specific data.
- * @ie: buffer containing information elements.
- * @ie_len: length of @ie buffer.
  *
  * Initializes the discovery device and configure the virtual interface.
  */
@@ -731,7 +755,7 @@ static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
        /* Override scan params to find a peer for a connection */
        if (num_chans == 1) {
                active = WL_SCAN_CONNECT_DWELL_TIME_MS;
-               /* XXX WAR to sync with presence period of VSDB GO.
+               /* WAR to sync with presence period of VSDB GO.
                 * send probe request more frequently
                 */
                nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
@@ -1032,6 +1056,269 @@ int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
 
 
 /**
+ * brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
+ *
+ * @ifp: interfac control.
+ * @e: event message. Not used, to make it usable for fweh event dispatcher.
+ * @data: not used.
+ *
+ */
+int brcmf_p2p_notify_action_tx_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(INFO, "Enter: status %d\n", e->status);
+
+       if (e->status == BRCMF_E_STATUS_SUCCESS)
+               set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
+       else
+               set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
+       /* for now complete the receiver process here !! */
+       complete(&p2p->send_af_done);
+
+       return 0;
+}
+
+
+/**
+ * brcmf_p2p_tx_action_frame() - send action frame over fil.
+ *
+ * @p2p: p2p info struct for vif.
+ * @af_params: action frame data/info.
+ *
+ * Send an action frame immediately without doing channel synchronization.
+ *
+ * This function waits for a completion event before returning.
+ * The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
+ * frame is transmitted.
+ */
+static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
+                                    struct brcmf_fil_af_params_le *af_params)
+{
+       struct brcmf_cfg80211_vif *vif;
+       s32 err = 0;
+       s32 timeout = 0;
+
+       brcmf_dbg(TRACE, "Enter\n");
+
+       clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
+       clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
+
+       vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
+       err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
+                                       sizeof(*af_params));
+       if (err) {
+               brcmf_err(" sending action frame has failed\n");
+               goto exit;
+       }
+
+       timeout = wait_for_completion_timeout(&p2p->send_af_done,
+                                       msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
+
+       if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
+               brcmf_dbg(TRACE, "TX action frame operation is success\n");
+       } else {
+               err = -EIO;
+               brcmf_dbg(TRACE, "TX action frame operation has failed\n");
+       }
+       /* clear status bit for action tx */
+       clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
+       clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
+
+exit:
+       return err;
+}
+
+
+/**
+ * brcmf_p2p_pub_af_tx() - public action frame tx routine.
+ *
+ * @cfg: driver private data for cfg80211 interface.
+ * @af_params: action frame data/info.
+ * @config_af_params: configuration data for action frame.
+ *
+ * routine which transmits ation frame public type.
+ */
+static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
+                              struct brcmf_fil_af_params_le *af_params,
+                              struct brcmf_config_af_params *config_af_params)
+{
+       struct brcmf_p2p_info *p2p = &cfg->p2p;
+       struct brcmf_fil_action_frame_le *action_frame;
+       struct brcmf_p2p_pub_act_frame *act_frm;
+       s32 err = 0;
+
+       action_frame = &af_params->action_frame;
+       act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
+
+       switch (act_frm->subtype) {
+       case P2P_PAF_GON_REQ:
+               brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
+               set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
+               config_af_params->mpc_onoff = 0;
+               p2p->next_af_subtype = act_frm->subtype + 1;
+               /* increase dwell time to wait for RESP frame */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               break;
+       case P2P_PAF_GON_RSP:
+               p2p->next_af_subtype = act_frm->subtype + 1;
+               /* increase dwell time to wait for CONF frame */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               break;
+       case P2P_PAF_GON_CONF:
+               /* If we reached till GO Neg confirmation reset the filter */
+               brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
+               clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
+               /* turn on mpc again if go nego is done */
+               config_af_params->mpc_onoff = 1;
+               /* minimize dwell time */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
+               break;
+       case P2P_PAF_INVITE_REQ:
+               p2p->next_af_subtype = act_frm->subtype + 1;
+               /* increase dwell time */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               break;
+       case P2P_PAF_INVITE_RSP:
+               /* minimize dwell time */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
+               break;
+       case P2P_PAF_DEVDIS_REQ:
+               p2p->next_af_subtype = act_frm->subtype + 1;
+               /* maximize dwell time to wait for RESP frame */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
+               break;
+       case P2P_PAF_DEVDIS_RSP:
+               /* minimize dwell time */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
+               break;
+       case P2P_PAF_PROVDIS_REQ:
+               config_af_params->mpc_onoff = 0;
+               p2p->next_af_subtype = act_frm->subtype + 1;
+               /* increase dwell time to wait for RESP frame */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               break;
+       case P2P_PAF_PROVDIS_RSP:
+               /* wpa_supplicant send go nego req right after prov disc */
+               p2p->next_af_subtype = P2P_PAF_GON_REQ;
+               /* increase dwell time to MED level */
+               af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               break;
+       default:
+               brcmf_err("Unknown p2p pub act frame subtype: %d\n",
+                         act_frm->subtype);
+               err = -EINVAL;
+       }
+       return err;
+}
+
+/**
+ * brcmf_p2p_send_action_frame() - send action frame .
+ *
+ * @cfg: driver private data for cfg80211 interface.
+ * @ndev: net device to transmit on.
+ * @af_params: configuration data for action frame.
+ */
+bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
+                                struct net_device *ndev,
+                                struct brcmf_fil_af_params_le *af_params)
+{
+       struct brcmf_p2p_info *p2p = &cfg->p2p;
+       struct brcmf_fil_action_frame_le *action_frame;
+       struct brcmf_config_af_params config_af_params;
+       u16 action_frame_len;
+       bool ack = false;
+       u8 category;
+       u8 action;
+       s32 tx_retry;
+
+       action_frame = &af_params->action_frame;
+       action_frame_len = le16_to_cpu(action_frame->len);
+
+       brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
+
+       /* Add the default dwell time. Dwell time to stay off-channel */
+       /* to wait for a response action frame after transmitting an  */
+       /* GO Negotiation action frame                                */
+       af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
+
+       category = action_frame->data[DOT11_ACTION_CAT_OFF];
+       action = action_frame->data[DOT11_ACTION_ACT_OFF];
+
+       /* initialize variables */
+       p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
+
+       /* config parameters */
+       config_af_params.max_tx_retry = P2P_AF_TX_MAX_RETRY;
+       config_af_params.mpc_onoff = -1;
+
+       if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
+               /* p2p public action frame process */
+               if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
+                       /* Just send unknown subtype frame with */
+                       /* default parameters.                  */
+                       brcmf_err("P2P Public action frame, unknown subtype.\n");
+               }
+       } else if (brcmf_p2p_is_gas_action(action_frame->data,
+                                          action_frame_len)) {
+               /* service discovery process */
+               if (action == P2PSD_ACTION_ID_GAS_IREQ ||
+                   action == P2PSD_ACTION_ID_GAS_CREQ) {
+                       /* save next af suptype to cancel */
+                       /* remaining dwell time           */
+                       p2p->next_af_subtype = action + 1;
+
+                       af_params->dwell_time =
+                               cpu_to_le32(P2P_AF_MED_DWELL_TIME);
+               } else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
+                          action == P2PSD_ACTION_ID_GAS_CRESP) {
+                       /* configure service discovery response frame */
+                       af_params->dwell_time =
+                               cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
+               } else {
+                       brcmf_err("Unknown action type: %d\n", action);
+                       goto exit;
+               }
+       } else if (brcmf_p2p_is_p2p_action(action_frame->data,
+                                          action_frame_len)) {
+               /* do not configure anything. it will be */
+               /* sent with a default configuration     */
+       } else {
+               brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
+                         category, action);
+               return false;
+       }
+
+       /* if scan is ongoing, abort current scan. */
+       if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
+               brcmf_abort_scanning(cfg);
+
+       /* To make sure to send successfully action frame, turn off mpc */
+       if (config_af_params.mpc_onoff == 0)
+               brcmf_set_mpc(ndev, 0);
+
+       /* if failed, retry it. tx_retry_max value is configure by .... */
+       tx_retry = 0;
+       while ((ack == false) && (tx_retry < config_af_params.max_tx_retry)) {
+               ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
+               tx_retry++;
+       }
+       if (ack == false)
+               brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
+
+exit:
+       /* if all done, turn mpc on again */
+       if (config_af_params.mpc_onoff == 1)
+               brcmf_set_mpc(ndev, 1);
+
+       return ack;
+}
+
+
+/**
  * brcmf_p2p_attach() - attach for P2P.
  *
  * @cfg: driver private data for cfg80211 interface.
@@ -1047,6 +1334,7 @@ void brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg,
        p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = vif;
        brcmf_p2p_generate_bss_mac(p2p);
        brcmf_p2p_set_firmware(p2p);
+       init_completion(&p2p->send_af_done);
 }
 
 /**
index d247946..0610dcf 100644 (file)
@@ -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_ */
index 3914beb..7ae84a0 100644 (file)
@@ -2494,7 +2494,7 @@ update_bss_info_out:
        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)
index 2595712..a020555 100644 (file)
@@ -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_ */