Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 768 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/util.c b/drivers/net/wireless/marvell/mwifiex/util.c
new file mode 100644
index 000000000..f9b71539d
--- /dev/null
+++ b/drivers/net/wireless/marvell/mwifiex/util.c
@@ -0,0 +1,768 @@
+/*
+ * Marvell Wireless LAN device driver: utility functions
+ *
+ * Copyright (C) 2011-2014, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+
+static struct mwifiex_debug_data items[] = {
+	{"debug_mask", item_size(debug_mask),
+	 item_addr(debug_mask), 1},
+	{"int_counter", item_size(int_counter),
+	 item_addr(int_counter), 1},
+	{"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
+	 item_addr(packets_out[WMM_AC_VO]), 1},
+	{"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
+	 item_addr(packets_out[WMM_AC_VI]), 1},
+	{"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
+	 item_addr(packets_out[WMM_AC_BE]), 1},
+	{"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
+	 item_addr(packets_out[WMM_AC_BK]), 1},
+	{"tx_buf_size", item_size(tx_buf_size),
+	 item_addr(tx_buf_size), 1},
+	{"curr_tx_buf_size", item_size(curr_tx_buf_size),
+	 item_addr(curr_tx_buf_size), 1},
+	{"ps_mode", item_size(ps_mode),
+	 item_addr(ps_mode), 1},
+	{"ps_state", item_size(ps_state),
+	 item_addr(ps_state), 1},
+	{"is_deep_sleep", item_size(is_deep_sleep),
+	 item_addr(is_deep_sleep), 1},
+	{"wakeup_dev_req", item_size(pm_wakeup_card_req),
+	 item_addr(pm_wakeup_card_req), 1},
+	{"wakeup_tries", item_size(pm_wakeup_fw_try),
+	 item_addr(pm_wakeup_fw_try), 1},
+	{"hs_configured", item_size(is_hs_configured),
+	 item_addr(is_hs_configured), 1},
+	{"hs_activated", item_size(hs_activated),
+	 item_addr(hs_activated), 1},
+	{"num_tx_timeout", item_size(num_tx_timeout),
+	 item_addr(num_tx_timeout), 1},
+	{"is_cmd_timedout", item_size(is_cmd_timedout),
+	 item_addr(is_cmd_timedout), 1},
+	{"timeout_cmd_id", item_size(timeout_cmd_id),
+	 item_addr(timeout_cmd_id), 1},
+	{"timeout_cmd_act", item_size(timeout_cmd_act),
+	 item_addr(timeout_cmd_act), 1},
+	{"last_cmd_id", item_size(last_cmd_id),
+	 item_addr(last_cmd_id), DBG_CMD_NUM},
+	{"last_cmd_act", item_size(last_cmd_act),
+	 item_addr(last_cmd_act), DBG_CMD_NUM},
+	{"last_cmd_index", item_size(last_cmd_index),
+	 item_addr(last_cmd_index), 1},
+	{"last_cmd_resp_id", item_size(last_cmd_resp_id),
+	 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
+	{"last_cmd_resp_index", item_size(last_cmd_resp_index),
+	 item_addr(last_cmd_resp_index), 1},
+	{"last_event", item_size(last_event),
+	 item_addr(last_event), DBG_CMD_NUM},
+	{"last_event_index", item_size(last_event_index),
+	 item_addr(last_event_index), 1},
+	{"last_mp_wr_bitmap", item_size(last_mp_wr_bitmap),
+	 item_addr(last_mp_wr_bitmap), MWIFIEX_DBG_SDIO_MP_NUM},
+	{"last_mp_wr_ports", item_size(last_mp_wr_ports),
+	 item_addr(last_mp_wr_ports), MWIFIEX_DBG_SDIO_MP_NUM},
+	{"last_mp_wr_len", item_size(last_mp_wr_len),
+	 item_addr(last_mp_wr_len), MWIFIEX_DBG_SDIO_MP_NUM},
+	{"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port),
+	 item_addr(last_mp_curr_wr_port), MWIFIEX_DBG_SDIO_MP_NUM},
+	{"last_sdio_mp_index", item_size(last_sdio_mp_index),
+	 item_addr(last_sdio_mp_index), 1},
+	{"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
+	 item_addr(num_cmd_host_to_card_failure), 1},
+	{"num_cmd_sleep_cfm_fail",
+	 item_size(num_cmd_sleep_cfm_host_to_card_failure),
+	 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
+	{"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
+	 item_addr(num_tx_host_to_card_failure), 1},
+	{"num_evt_deauth", item_size(num_event_deauth),
+	 item_addr(num_event_deauth), 1},
+	{"num_evt_disassoc", item_size(num_event_disassoc),
+	 item_addr(num_event_disassoc), 1},
+	{"num_evt_link_lost", item_size(num_event_link_lost),
+	 item_addr(num_event_link_lost), 1},
+	{"num_cmd_deauth", item_size(num_cmd_deauth),
+	 item_addr(num_cmd_deauth), 1},
+	{"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
+	 item_addr(num_cmd_assoc_success), 1},
+	{"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
+	 item_addr(num_cmd_assoc_failure), 1},
+	{"cmd_sent", item_size(cmd_sent),
+	 item_addr(cmd_sent), 1},
+	{"data_sent", item_size(data_sent),
+	 item_addr(data_sent), 1},
+	{"cmd_resp_received", item_size(cmd_resp_received),
+	 item_addr(cmd_resp_received), 1},
+	{"event_received", item_size(event_received),
+	 item_addr(event_received), 1},
+
+	/* variables defined in struct mwifiex_adapter */
+	{"cmd_pending", adapter_item_size(cmd_pending),
+	 adapter_item_addr(cmd_pending), 1},
+	{"tx_pending", adapter_item_size(tx_pending),
+	 adapter_item_addr(tx_pending), 1},
+	{"rx_pending", adapter_item_size(rx_pending),
+	 adapter_item_addr(rx_pending), 1},
+};
+
+static int num_of_items = ARRAY_SIZE(items);
+
+/*
+ * Firmware initialization complete callback handler.
+ *
+ * This function wakes up the function waiting on the init
+ * wait queue for the firmware initialization to complete.
+ */
+int mwifiex_init_fw_complete(struct mwifiex_adapter *adapter)
+{
+
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_READY)
+		if (adapter->if_ops.init_fw_port)
+			adapter->if_ops.init_fw_port(adapter);
+
+	adapter->init_wait_q_woken = true;
+	wake_up_interruptible(&adapter->init_wait_q);
+	return 0;
+}
+
+/*
+ * This function sends init/shutdown command
+ * to firmware.
+ */
+int mwifiex_init_shutdown_fw(struct mwifiex_private *priv,
+			     u32 func_init_shutdown)
+{
+	u16 cmd;
+
+	if (func_init_shutdown == MWIFIEX_FUNC_INIT) {
+		cmd = HostCmd_CMD_FUNC_INIT;
+	} else if (func_init_shutdown == MWIFIEX_FUNC_SHUTDOWN) {
+		cmd = HostCmd_CMD_FUNC_SHUTDOWN;
+	} else {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "unsupported parameter\n");
+		return -1;
+	}
+
+	return mwifiex_send_cmd(priv, cmd, HostCmd_ACT_GEN_SET, 0, NULL, true);
+}
+EXPORT_SYMBOL_GPL(mwifiex_init_shutdown_fw);
+
+/*
+ * IOCTL request handler to set/get debug information.
+ *
+ * This function collates/sets the information from/to different driver
+ * structures.
+ */
+int mwifiex_get_debug_info(struct mwifiex_private *priv,
+			   struct mwifiex_debug_info *info)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+
+	if (info) {
+		info->debug_mask = adapter->debug_mask;
+		memcpy(info->packets_out,
+		       priv->wmm.packets_out,
+		       sizeof(priv->wmm.packets_out));
+		info->curr_tx_buf_size = (u32) adapter->curr_tx_buf_size;
+		info->tx_buf_size = (u32) adapter->tx_buf_size;
+		info->rx_tbl_num = mwifiex_get_rx_reorder_tbl(priv,
+							      info->rx_tbl);
+		info->tx_tbl_num = mwifiex_get_tx_ba_stream_tbl(priv,
+								info->tx_tbl);
+		info->tdls_peer_num = mwifiex_get_tdls_list(priv,
+							    info->tdls_list);
+		info->ps_mode = adapter->ps_mode;
+		info->ps_state = adapter->ps_state;
+		info->is_deep_sleep = adapter->is_deep_sleep;
+		info->pm_wakeup_card_req = adapter->pm_wakeup_card_req;
+		info->pm_wakeup_fw_try = adapter->pm_wakeup_fw_try;
+		info->is_hs_configured = test_bit(MWIFIEX_IS_HS_CONFIGURED,
+						  &adapter->work_flags);
+		info->hs_activated = adapter->hs_activated;
+		info->is_cmd_timedout = test_bit(MWIFIEX_IS_CMD_TIMEDOUT,
+						 &adapter->work_flags);
+		info->num_cmd_host_to_card_failure
+				= adapter->dbg.num_cmd_host_to_card_failure;
+		info->num_cmd_sleep_cfm_host_to_card_failure
+			= adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure;
+		info->num_tx_host_to_card_failure
+				= adapter->dbg.num_tx_host_to_card_failure;
+		info->num_event_deauth = adapter->dbg.num_event_deauth;
+		info->num_event_disassoc = adapter->dbg.num_event_disassoc;
+		info->num_event_link_lost = adapter->dbg.num_event_link_lost;
+		info->num_cmd_deauth = adapter->dbg.num_cmd_deauth;
+		info->num_cmd_assoc_success =
+					adapter->dbg.num_cmd_assoc_success;
+		info->num_cmd_assoc_failure =
+					adapter->dbg.num_cmd_assoc_failure;
+		info->num_tx_timeout = adapter->dbg.num_tx_timeout;
+		info->timeout_cmd_id = adapter->dbg.timeout_cmd_id;
+		info->timeout_cmd_act = adapter->dbg.timeout_cmd_act;
+		memcpy(info->last_cmd_id, adapter->dbg.last_cmd_id,
+		       sizeof(adapter->dbg.last_cmd_id));
+		memcpy(info->last_cmd_act, adapter->dbg.last_cmd_act,
+		       sizeof(adapter->dbg.last_cmd_act));
+		info->last_cmd_index = adapter->dbg.last_cmd_index;
+		memcpy(info->last_cmd_resp_id, adapter->dbg.last_cmd_resp_id,
+		       sizeof(adapter->dbg.last_cmd_resp_id));
+		info->last_cmd_resp_index = adapter->dbg.last_cmd_resp_index;
+		memcpy(info->last_event, adapter->dbg.last_event,
+		       sizeof(adapter->dbg.last_event));
+		info->last_event_index = adapter->dbg.last_event_index;
+		memcpy(info->last_mp_wr_bitmap, adapter->dbg.last_mp_wr_bitmap,
+		       sizeof(adapter->dbg.last_mp_wr_bitmap));
+		memcpy(info->last_mp_wr_ports, adapter->dbg.last_mp_wr_ports,
+		       sizeof(adapter->dbg.last_mp_wr_ports));
+		memcpy(info->last_mp_curr_wr_port,
+		       adapter->dbg.last_mp_curr_wr_port,
+		       sizeof(adapter->dbg.last_mp_curr_wr_port));
+		memcpy(info->last_mp_wr_len, adapter->dbg.last_mp_wr_len,
+		       sizeof(adapter->dbg.last_mp_wr_len));
+		info->last_sdio_mp_index = adapter->dbg.last_sdio_mp_index;
+		info->data_sent = adapter->data_sent;
+		info->cmd_sent = adapter->cmd_sent;
+		info->cmd_resp_received = adapter->cmd_resp_received;
+	}
+
+	return 0;
+}
+
+int mwifiex_debug_info_to_buffer(struct mwifiex_private *priv, char *buf,
+				 struct mwifiex_debug_info *info)
+{
+	char *p = buf;
+	struct mwifiex_debug_data *d = &items[0];
+	size_t size, addr;
+	long val;
+	int i, j;
+
+	if (!info)
+		return 0;
+
+	for (i = 0; i < num_of_items; i++) {
+		p += sprintf(p, "%s=", d[i].name);
+
+		size = d[i].size / d[i].num;
+
+		if (i < (num_of_items - 3))
+			addr = d[i].addr + (size_t)info;
+		else /* The last 3 items are struct mwifiex_adapter variables */
+			addr = d[i].addr + (size_t)priv->adapter;
+
+		for (j = 0; j < d[i].num; j++) {
+			switch (size) {
+			case 1:
+				val = *((u8 *)addr);
+				break;
+			case 2:
+				val = get_unaligned((u16 *)addr);
+				break;
+			case 4:
+				val = get_unaligned((u32 *)addr);
+				break;
+			case 8:
+				val = get_unaligned((long long *)addr);
+				break;
+			default:
+				val = -1;
+				break;
+			}
+
+			p += sprintf(p, "%#lx ", val);
+			addr += size;
+		}
+
+		p += sprintf(p, "\n");
+	}
+
+	if (info->tx_tbl_num) {
+		p += sprintf(p, "Tx BA stream table:\n");
+		for (i = 0; i < info->tx_tbl_num; i++)
+			p += sprintf(p, "tid = %d, ra = %pM\n",
+				     info->tx_tbl[i].tid, info->tx_tbl[i].ra);
+	}
+
+	if (info->rx_tbl_num) {
+		p += sprintf(p, "Rx reorder table:\n");
+		for (i = 0; i < info->rx_tbl_num; i++) {
+			p += sprintf(p, "tid = %d, ta = %pM, ",
+				     info->rx_tbl[i].tid,
+				     info->rx_tbl[i].ta);
+			p += sprintf(p, "start_win = %d, ",
+				     info->rx_tbl[i].start_win);
+			p += sprintf(p, "win_size = %d, buffer: ",
+				     info->rx_tbl[i].win_size);
+
+			for (j = 0; j < info->rx_tbl[i].win_size; j++)
+				p += sprintf(p, "%c ",
+					     info->rx_tbl[i].buffer[j] ?
+					     '1' : '0');
+
+			p += sprintf(p, "\n");
+		}
+	}
+
+	if (info->tdls_peer_num) {
+		p += sprintf(p, "TDLS peer table:\n");
+		for (i = 0; i < info->tdls_peer_num; i++) {
+			p += sprintf(p, "peer = %pM",
+				     info->tdls_list[i].peer_addr);
+			p += sprintf(p, "\n");
+		}
+	}
+
+	return p - buf;
+}
+
+static int
+mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
+			  struct rxpd *rx_pd)
+{
+	u16 stype;
+	u8 category, action_code, *addr2;
+	struct ieee80211_hdr *ieee_hdr = (void *)payload;
+
+	stype = (le16_to_cpu(ieee_hdr->frame_control) & IEEE80211_FCTL_STYPE);
+
+	switch (stype) {
+	case IEEE80211_STYPE_ACTION:
+		category = *(payload + sizeof(struct ieee80211_hdr));
+		switch (category) {
+		case WLAN_CATEGORY_PUBLIC:
+			action_code = *(payload + sizeof(struct ieee80211_hdr)
+					+ 1);
+			if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
+				addr2 = ieee_hdr->addr2;
+				mwifiex_dbg(priv->adapter, INFO,
+					    "TDLS discovery response %pM nf=%d, snr=%d\n",
+					    addr2, rx_pd->nf, rx_pd->snr);
+				mwifiex_auto_tdls_update_peer_signal(priv,
+								     addr2,
+								     rx_pd->snr,
+								     rx_pd->nf);
+			}
+			break;
+		case WLAN_CATEGORY_BACK:
+			/*we dont indicate BACK action frames to cfg80211*/
+			mwifiex_dbg(priv->adapter, INFO,
+				    "drop BACK action frames");
+			return -1;
+		default:
+			mwifiex_dbg(priv->adapter, INFO,
+				    "unknown public action frame category %d\n",
+				    category);
+		}
+		break;
+	default:
+		mwifiex_dbg(priv->adapter, INFO,
+		    "unknown mgmt frame subtype %#x\n", stype);
+		return 0;
+	}
+
+	return 0;
+}
+/*
+ * This function processes the received management packet and send it
+ * to the kernel.
+ */
+int
+mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
+			    struct sk_buff *skb)
+{
+	struct rxpd *rx_pd;
+	u16 pkt_len;
+	struct ieee80211_hdr *ieee_hdr;
+
+	if (!skb)
+		return -1;
+
+	if (!priv->mgmt_frame_mask ||
+	    priv->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "do not receive mgmt frames on uninitialized intf");
+		return -1;
+	}
+
+	rx_pd = (struct rxpd *)skb->data;
+
+	skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
+	skb_pull(skb, sizeof(pkt_len));
+
+	pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
+
+	ieee_hdr = (void *)skb->data;
+	if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
+		if (mwifiex_parse_mgmt_packet(priv, (u8 *)ieee_hdr,
+					      pkt_len, rx_pd))
+			return -1;
+	}
+	/* Remove address4 */
+	memmove(skb->data + sizeof(struct ieee80211_hdr_3addr),
+		skb->data + sizeof(struct ieee80211_hdr),
+		pkt_len - sizeof(struct ieee80211_hdr));
+
+	pkt_len -= ETH_ALEN + sizeof(pkt_len);
+	rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
+
+	cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
+			 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
+			 0);
+
+	return 0;
+}
+
+/*
+ * This function processes the received packet before sending it to the
+ * kernel.
+ *
+ * It extracts the SKB from the received buffer and sends it to kernel.
+ * In case the received buffer does not contain the data in SKB format,
+ * the function creates a blank SKB, fills it with the data from the
+ * received buffer and then sends this new SKB to the kernel.
+ */
+int mwifiex_recv_packet(struct mwifiex_private *priv, struct sk_buff *skb)
+{
+	struct mwifiex_sta_node *src_node;
+	struct ethhdr *p_ethhdr;
+
+	if (!skb)
+		return -1;
+
+	priv->stats.rx_bytes += skb->len;
+	priv->stats.rx_packets++;
+
+	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
+		p_ethhdr = (void *)skb->data;
+		src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
+		if (src_node) {
+			src_node->stats.last_rx = jiffies;
+			src_node->stats.rx_bytes += skb->len;
+			src_node->stats.rx_packets++;
+		}
+	}
+
+	skb->dev = priv->netdev;
+	skb->protocol = eth_type_trans(skb, priv->netdev);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	/* This is required only in case of 11n and USB/PCIE as we alloc
+	 * a buffer of 4K only if its 11N (to be able to receive 4K
+	 * AMSDU packets). In case of SD we allocate buffers based
+	 * on the size of packet and hence this is not needed.
+	 *
+	 * Modifying the truesize here as our allocation for each
+	 * skb is 4K but we only receive 2K packets and this cause
+	 * the kernel to start dropping packets in case where
+	 * application has allocated buffer based on 2K size i.e.
+	 * if there a 64K packet received (in IP fragments and
+	 * application allocates 64K to receive this packet but
+	 * this packet would almost double up because we allocate
+	 * each 1.5K fragment in 4K and pass it up. As soon as the
+	 * 64K limit hits kernel will start to drop rest of the
+	 * fragments. Currently we fail the Filesndl-ht.scr script
+	 * for UDP, hence this fix
+	 */
+	if ((priv->adapter->iface_type == MWIFIEX_USB ||
+	     priv->adapter->iface_type == MWIFIEX_PCIE) &&
+	    (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE))
+		skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
+
+	if (in_interrupt())
+		netif_rx(skb);
+	else
+		netif_rx_ni(skb);
+
+	return 0;
+}
+
+/*
+ * IOCTL completion callback handler.
+ *
+ * This function is called when a pending IOCTL is completed.
+ *
+ * If work queue support is enabled, the function wakes up the
+ * corresponding waiting function. Otherwise, it processes the
+ * IOCTL response and frees the response buffer.
+ */
+int mwifiex_complete_cmd(struct mwifiex_adapter *adapter,
+			 struct cmd_ctrl_node *cmd_node)
+{
+	WARN_ON(!cmd_node->wait_q_enabled);
+	mwifiex_dbg(adapter, CMD, "cmd completed: status=%d\n",
+		    adapter->cmd_wait_q.status);
+
+	*cmd_node->condition = true;
+	wake_up_interruptible(&adapter->cmd_wait_q.wait);
+
+	return 0;
+}
+
+/* This function will return the pointer to station entry in station list
+ * table which matches specified mac address.
+ * This function should be called after acquiring RA list spinlock.
+ * NULL is returned if station entry is not found in associated STA list.
+ */
+struct mwifiex_sta_node *
+mwifiex_get_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+	struct mwifiex_sta_node *node;
+
+	if (!mac)
+		return NULL;
+
+	list_for_each_entry(node, &priv->sta_list, list) {
+		if (!memcmp(node->mac_addr, mac, ETH_ALEN))
+			return node;
+	}
+
+	return NULL;
+}
+
+static struct mwifiex_sta_node *
+mwifiex_get_tdls_sta_entry(struct mwifiex_private *priv, u8 status)
+{
+	struct mwifiex_sta_node *node;
+
+	list_for_each_entry(node, &priv->sta_list, list) {
+		if (node->tdls_status == status)
+			return node;
+	}
+
+	return NULL;
+}
+
+/* If tdls channel switching is on-going, tx data traffic should be
+ * blocked until the switching stage completed.
+ */
+u8 mwifiex_is_tdls_chan_switching(struct mwifiex_private *priv)
+{
+	struct mwifiex_sta_node *sta_ptr;
+
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return false;
+
+	sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_CHAN_SWITCHING);
+	if (sta_ptr)
+		return true;
+
+	return false;
+}
+
+u8 mwifiex_is_tdls_off_chan(struct mwifiex_private *priv)
+{
+	struct mwifiex_sta_node *sta_ptr;
+
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return false;
+
+	sta_ptr = mwifiex_get_tdls_sta_entry(priv, TDLS_IN_OFF_CHAN);
+	if (sta_ptr)
+		return true;
+
+	return false;
+}
+
+/* If tdls channel switching is on-going or tdls operate on off-channel,
+ * cmd path should be blocked until tdls switched to base-channel.
+ */
+u8 mwifiex_is_send_cmd_allowed(struct mwifiex_private *priv)
+{
+	if (!priv || !ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info))
+		return true;
+
+	if (mwifiex_is_tdls_chan_switching(priv) ||
+	    mwifiex_is_tdls_off_chan(priv))
+		return false;
+
+	return true;
+}
+
+/* This function will add a sta_node entry to associated station list
+ * table with the given mac address.
+ * If entry exist already, existing entry is returned.
+ * If received mac address is NULL, NULL is returned.
+ */
+struct mwifiex_sta_node *
+mwifiex_add_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+	struct mwifiex_sta_node *node;
+	unsigned long flags;
+
+	if (!mac)
+		return NULL;
+
+	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+	node = mwifiex_get_sta_entry(priv, mac);
+	if (node)
+		goto done;
+
+	node = kzalloc(sizeof(*node), GFP_ATOMIC);
+	if (!node)
+		goto done;
+
+	memcpy(node->mac_addr, mac, ETH_ALEN);
+	list_add_tail(&node->list, &priv->sta_list);
+
+done:
+	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+	return node;
+}
+
+/* This function will search for HT IE in association request IEs
+ * and set station HT parameters accordingly.
+ */
+void
+mwifiex_set_sta_ht_cap(struct mwifiex_private *priv, const u8 *ies,
+		       int ies_len, struct mwifiex_sta_node *node)
+{
+	struct ieee_types_header *ht_cap_ie;
+	const struct ieee80211_ht_cap *ht_cap;
+
+	if (!ies)
+		return;
+
+	ht_cap_ie = (void *)cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies,
+					     ies_len);
+	if (ht_cap_ie) {
+		ht_cap = (void *)(ht_cap_ie + 1);
+		node->is_11n_enabled = 1;
+		node->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;
+	} else {
+		node->is_11n_enabled = 0;
+	}
+
+	return;
+}
+
+/* This function will delete a station entry from station list */
+void mwifiex_del_sta_entry(struct mwifiex_private *priv, const u8 *mac)
+{
+	struct mwifiex_sta_node *node;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+
+	node = mwifiex_get_sta_entry(priv, mac);
+	if (node) {
+		list_del(&node->list);
+		kfree(node);
+	}
+
+	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+	return;
+}
+
+/* This function will delete all stations from associated station list. */
+void mwifiex_del_all_sta_list(struct mwifiex_private *priv)
+{
+	struct mwifiex_sta_node *node, *tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
+
+	list_for_each_entry_safe(node, tmp, &priv->sta_list, list) {
+		list_del(&node->list);
+		kfree(node);
+	}
+
+	INIT_LIST_HEAD(&priv->sta_list);
+	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
+	return;
+}
+
+/* This function adds histogram data to histogram array*/
+void mwifiex_hist_data_add(struct mwifiex_private *priv,
+			   u8 rx_rate, s8 snr, s8 nflr)
+{
+	struct mwifiex_histogram_data *phist_data = priv->hist_data;
+
+	if (atomic_read(&phist_data->num_samples) > MWIFIEX_HIST_MAX_SAMPLES)
+		mwifiex_hist_data_reset(priv);
+	mwifiex_hist_data_set(priv, rx_rate, snr, nflr);
+}
+
+/* function to add histogram record */
+void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr,
+			   s8 nflr)
+{
+	struct mwifiex_histogram_data *phist_data = priv->hist_data;
+	s8 nf   = -nflr;
+	s8 rssi = snr - nflr;
+
+	atomic_inc(&phist_data->num_samples);
+	atomic_inc(&phist_data->rx_rate[rx_rate]);
+	atomic_inc(&phist_data->snr[snr + 128]);
+	atomic_inc(&phist_data->noise_flr[nf + 128]);
+	atomic_inc(&phist_data->sig_str[rssi + 128]);
+}
+
+/* function to reset histogram data during init/reset */
+void mwifiex_hist_data_reset(struct mwifiex_private *priv)
+{
+	int ix;
+	struct mwifiex_histogram_data *phist_data = priv->hist_data;
+
+	atomic_set(&phist_data->num_samples, 0);
+	for (ix = 0; ix < MWIFIEX_MAX_AC_RX_RATES; ix++)
+		atomic_set(&phist_data->rx_rate[ix], 0);
+	for (ix = 0; ix < MWIFIEX_MAX_SNR; ix++)
+		atomic_set(&phist_data->snr[ix], 0);
+	for (ix = 0; ix < MWIFIEX_MAX_NOISE_FLR; ix++)
+		atomic_set(&phist_data->noise_flr[ix], 0);
+	for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++)
+		atomic_set(&phist_data->sig_str[ix], 0);
+}
+
+void *mwifiex_alloc_dma_align_buf(int rx_len, gfp_t flags)
+{
+	struct sk_buff *skb;
+	int buf_len, pad;
+
+	buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ;
+
+	skb = __dev_alloc_skb(buf_len, flags);
+
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, MWIFIEX_RX_HEADROOM);
+
+	pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) -
+	      (long)skb->data;
+
+	skb_reserve(skb, pad);
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(mwifiex_alloc_dma_align_buf);
+
+void mwifiex_fw_dump_event(struct mwifiex_private *priv)
+{
+	mwifiex_send_cmd(priv, HostCmd_CMD_FW_DUMP_EVENT, HostCmd_ACT_GEN_SET,
+			 0, NULL, true);
+}
+EXPORT_SYMBOL_GPL(mwifiex_fw_dump_event);