mwifiex: add HT aggregation support for adhoc mode

This patch adds HT support for adhoc station. Firmware will upload
ibss sta connect event with beacon data, whenever new station joins
the adhoc network. Driver will check the HT IE and decide whether to
support HT aggreagation or not.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 131 insertions, 1 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/sta_event.c b/drivers/net/wireless/marvell/mwifiex/sta_event.c
index b973ee87047a..9df0c4dc06ed 100644
--- a/drivers/net/wireless/marvell/mwifiex/sta_event.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c
@@ -25,6 +25,99 @@
 #include "wmm.h"
 #include "11n.h"
 
+#define MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE    12
+
+static int mwifiex_check_ibss_peer_capabilties(struct mwifiex_private *priv,
+					       struct mwifiex_sta_node *sta_ptr,
+					       struct sk_buff *event)
+{
+	int evt_len, ele_len;
+	u8 *curr;
+	struct ieee_types_header *ele_hdr;
+	struct mwifiex_ie_types_mgmt_frame *tlv_mgmt_frame;
+	const struct ieee80211_ht_cap *ht_cap;
+	const struct ieee80211_vht_cap *vht_cap;
+
+	skb_pull(event, MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE);
+	evt_len = event->len;
+	curr = event->data;
+
+	mwifiex_dbg_dump(priv->adapter, EVT_D, "ibss peer capabilties:",
+			 event->data, event->len);
+
+	skb_push(event, MWIFIEX_IBSS_CONNECT_EVT_FIX_SIZE);
+
+	tlv_mgmt_frame = (void *)curr;
+	if (evt_len >= sizeof(*tlv_mgmt_frame) &&
+	    le16_to_cpu(tlv_mgmt_frame->header.type) ==
+	    TLV_TYPE_UAP_MGMT_FRAME) {
+		/* Locate curr pointer to the start of beacon tlv,
+		 * timestamp 8 bytes, beacon intervel 2 bytes,
+		 * capability info 2 bytes, totally 12 byte beacon header
+		 */
+		evt_len = le16_to_cpu(tlv_mgmt_frame->header.len);
+		curr += (sizeof(*tlv_mgmt_frame) + 12);
+	} else {
+		mwifiex_dbg(priv->adapter, MSG,
+			    "management frame tlv not found!\n");
+		return 0;
+	}
+
+	while (evt_len >= sizeof(*ele_hdr)) {
+		ele_hdr = (struct ieee_types_header *)curr;
+		ele_len = ele_hdr->len;
+
+		if (evt_len < ele_len + sizeof(*ele_hdr))
+			break;
+
+		switch (ele_hdr->element_id) {
+		case WLAN_EID_HT_CAPABILITY:
+			sta_ptr->is_11n_enabled = true;
+			ht_cap = (void *)(ele_hdr + 2);
+			sta_ptr->max_amsdu = le16_to_cpu(ht_cap->cap_info) &
+				IEEE80211_HT_CAP_MAX_AMSDU ?
+				MWIFIEX_TX_DATA_BUF_SIZE_8K :
+				MWIFIEX_TX_DATA_BUF_SIZE_4K;
+			mwifiex_dbg(priv->adapter, INFO,
+				    "11n enabled!, max_amsdu : %d\n",
+				    sta_ptr->max_amsdu);
+			break;
+
+		case WLAN_EID_VHT_CAPABILITY:
+			sta_ptr->is_11ac_enabled = true;
+			vht_cap = (void *)(ele_hdr + 2);
+			/* check VHT MAXMPDU capability */
+			switch (le32_to_cpu(vht_cap->vht_cap_info) & 0x3) {
+			case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
+				sta_ptr->max_amsdu =
+					MWIFIEX_TX_DATA_BUF_SIZE_12K;
+				break;
+			case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
+				sta_ptr->max_amsdu =
+					MWIFIEX_TX_DATA_BUF_SIZE_8K;
+				break;
+			case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
+				sta_ptr->max_amsdu =
+					MWIFIEX_TX_DATA_BUF_SIZE_4K;
+			default:
+				break;
+			}
+
+			mwifiex_dbg(priv->adapter, INFO,
+				    "11ac enabled!, max_amsdu : %d\n",
+				    sta_ptr->max_amsdu);
+			break;
+		default:
+			break;
+		}
+
+		curr += (ele_len + sizeof(*ele_hdr));
+		evt_len -= (ele_len + sizeof(*ele_hdr));
+	}
+
+	return 0;
+}
+
 /*
  * This function resets the connection state.
  *
@@ -519,6 +612,8 @@ void mwifiex_bt_coex_wlan_param_update_event(struct mwifiex_private *priv,
  *      - EVENT_LINK_QUALITY
  *      - EVENT_PRE_BEACON_LOST
  *      - EVENT_IBSS_COALESCED
+ *      - EVENT_IBSS_STA_CONNECT
+ *      - EVENT_IBSS_STA_DISCONNECT
  *      - EVENT_WEP_ICV_ERR
  *      - EVENT_BW_CHANGE
  *      - EVENT_HOSTWAKE_STAIE
@@ -547,9 +642,11 @@ void mwifiex_bt_coex_wlan_param_update_event(struct mwifiex_private *priv,
 int mwifiex_process_sta_event(struct mwifiex_private *priv)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
-	int ret = 0;
+	int ret = 0, i;
 	u32 eventcause = adapter->event_cause;
 	u16 ctrl, reason_code;
+	u8 ibss_sta_addr[ETH_ALEN];
+	struct mwifiex_sta_node *sta_ptr;
 
 	switch (eventcause) {
 	case EVENT_DUMMY_HOST_WAKEUP_SIGNAL:
@@ -775,6 +872,39 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)
 				HostCmd_CMD_802_11_IBSS_COALESCING_STATUS,
 				HostCmd_ACT_GEN_GET, 0, NULL, false);
 		break;
+	case EVENT_IBSS_STA_CONNECT:
+		ether_addr_copy(ibss_sta_addr, adapter->event_body + 2);
+		mwifiex_dbg(adapter, EVENT, "event: IBSS_STA_CONNECT %pM\n",
+			    ibss_sta_addr);
+		sta_ptr = mwifiex_add_sta_entry(priv, ibss_sta_addr);
+		if (sta_ptr && adapter->adhoc_11n_enabled) {
+			mwifiex_check_ibss_peer_capabilties(priv, sta_ptr,
+							    adapter->event_skb);
+			if (sta_ptr->is_11n_enabled)
+				for (i = 0; i < MAX_NUM_TID; i++)
+					sta_ptr->ampdu_sta[i] =
+					priv->aggr_prio_tbl[i].ampdu_user;
+			else
+				for (i = 0; i < MAX_NUM_TID; i++)
+					sta_ptr->ampdu_sta[i] =
+						BA_STREAM_NOT_ALLOWED;
+			memset(sta_ptr->rx_seq, 0xff, sizeof(sta_ptr->rx_seq));
+		}
+
+		break;
+	case EVENT_IBSS_STA_DISCONNECT:
+		ether_addr_copy(ibss_sta_addr, adapter->event_body + 2);
+		mwifiex_dbg(adapter, EVENT, "event: IBSS_STA_DISCONNECT %pM\n",
+			    ibss_sta_addr);
+		sta_ptr = mwifiex_get_sta_entry(priv, ibss_sta_addr);
+		if (sta_ptr && sta_ptr->is_11n_enabled) {
+			mwifiex_11n_del_rx_reorder_tbl_by_ta(priv,
+							     ibss_sta_addr);
+			mwifiex_del_tx_ba_stream_tbl_by_ra(priv, ibss_sta_addr);
+		}
+		mwifiex_wmm_del_peer_ra_list(priv, ibss_sta_addr);
+		mwifiex_del_sta_entry(priv, ibss_sta_addr);
+		break;
 	case EVENT_ADDBA:
 		mwifiex_dbg(adapter, EVENT, "event: ADDBA Request\n");
 		mwifiex_send_cmd(priv, HostCmd_CMD_11N_ADDBA_RSP,