Message-Id: <20240621075208.513497-38-yu-hao.lin@nxp.com>
Date: Fri, 21 Jun 2024 15:52:02 +0800
From: David Lin <yu-hao.lin@....com>
To: linux-wireless@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	briannorris@...omium.org,
	kvalo@...nel.org,
	francesco@...cini.it,
	tsung-hsien.hsieh@....com,
	David Lin <yu-hao.lin@....com>
Subject: [PATCH 37/43] wifi: nxpwifi: add util.c

Signed-off-by: David Lin <yu-hao.lin@....com>
---
 drivers/net/wireless/nxp/nxpwifi/util.c | 751 ++++++++++++++++++++++++
 1 file changed, 751 insertions(+)
 create mode 100644 drivers/net/wireless/nxp/nxpwifi/util.c

diff --git a/drivers/net/wireless/nxp/nxpwifi/util.c b/drivers/net/wireless/nxp/nxpwifi/util.c
new file mode 100644
index 000000000000..bae1216e7599
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/util.c
@@ -0,0 +1,751 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: utility functions
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "cmdevt.h"
+#include "wmm.h"
+#include "11n.h"
+
+static struct nxpwifi_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), NXPWIFI_DBG_SDIO_MP_NUM},
+	{"last_mp_wr_ports", item_size(last_mp_wr_ports),
+	 item_addr(last_mp_wr_ports), NXPWIFI_DBG_SDIO_MP_NUM},
+	{"last_mp_wr_len", item_size(last_mp_wr_len),
+	 item_addr(last_mp_wr_len), NXPWIFI_DBG_SDIO_MP_NUM},
+	{"last_mp_curr_wr_port", item_size(last_mp_curr_wr_port),
+	 item_addr(last_mp_curr_wr_port), NXPWIFI_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 nxpwifi_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 nxpwifi_init_fw_complete(struct nxpwifi_adapter *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 nxpwifi_init_shutdown_fw(struct nxpwifi_private *priv,
+			     u32 func_init_shutdown)
+{
+	u16 cmd;
+
+	if (func_init_shutdown == NXPWIFI_FUNC_INIT) {
+		cmd = HOST_CMD_FUNC_INIT;
+	} else if (func_init_shutdown == NXPWIFI_FUNC_SHUTDOWN) {
+		cmd = HOST_CMD_FUNC_SHUTDOWN;
+	} else {
+		nxpwifi_dbg(priv->adapter, ERROR,
+			    "unsupported parameter\n");
+		return -1;
+	}
+
+	return nxpwifi_send_cmd(priv, cmd, HOST_ACT_GEN_SET, 0, NULL, true);
+}
+EXPORT_SYMBOL_GPL(nxpwifi_init_shutdown_fw);
+
+/* IOCTL request handler to set/get debug information.
+ *
+ * This function collates/sets the information from/to different driver
+ * structures.
+ */
+int nxpwifi_get_debug_info(struct nxpwifi_private *priv,
+			   struct nxpwifi_debug_info *info)
+{
+	struct nxpwifi_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 = nxpwifi_get_rx_reorder_tbl(priv,
+							      info->rx_tbl);
+		info->tx_tbl_num = nxpwifi_get_tx_ba_stream_tbl(priv,
+								info->tx_tbl);
+		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(NXPWIFI_IS_HS_CONFIGURED,
+						  &adapter->work_flags);
+		info->hs_activated = adapter->hs_activated;
+		info->is_cmd_timedout = test_bit(NXPWIFI_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 nxpwifi_debug_info_to_buffer(struct nxpwifi_private *priv, char *buf,
+				 struct nxpwifi_debug_info *info)
+{
+	char *p = buf;
+	struct nxpwifi_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 nxpwifi_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");
+		}
+	}
+
+	return p - buf;
+}
+
+static int
+nxpwifi_parse_mgmt_packet(struct nxpwifi_private *priv, u8 *payload, u16 len,
+			  struct rxpd *rx_pd)
+{
+	u16 stype;
+	u8 category;
+	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_BACK:
+			/*we dont indicate BACK action frames to cfg80211*/
+			nxpwifi_dbg(priv->adapter, INFO,
+				    "drop BACK action frames");
+			return -1;
+		default:
+			nxpwifi_dbg(priv->adapter, INFO,
+				    "unknown public action frame category %d\n",
+				    category);
+		}
+		break;
+	default:
+		nxpwifi_dbg(priv->adapter, INFO,
+			    "unknown mgmt frame subtype %#x\n", stype);
+		return 0;
+	}
+
+	return 0;
+}
+
+/* This function sends deauth packet to the kernel. */
+void nxpwifi_host_mlme_disconnect(struct nxpwifi_private *priv,
+				  u16 reason_code, u8 *sa)
+{
+	u8 frame_buf[100];
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)frame_buf;
+
+	memset(frame_buf, 0, sizeof(frame_buf));
+	mgmt->frame_control = cpu_to_le16(IEEE80211_STYPE_DEAUTH);
+	mgmt->duration = 0;
+	mgmt->seq_ctrl = 0;
+	mgmt->u.deauth.reason_code = cpu_to_le16(reason_code);
+
+	if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) {
+		eth_broadcast_addr(mgmt->da);
+		memcpy(mgmt->sa,
+		       priv->curr_bss_params.bss_descriptor.mac_address,
+		       ETH_ALEN);
+		memcpy(mgmt->bssid, priv->cfg_bssid, ETH_ALEN);
+		priv->auth_flag = 0;
+		priv->auth_alg = WLAN_AUTH_NONE;
+	} else {
+		memcpy(mgmt->da, priv->curr_addr, ETH_ALEN);
+		memcpy(mgmt->sa, sa, ETH_ALEN);
+		memcpy(mgmt->bssid, priv->curr_addr, ETH_ALEN);
+	}
+
+	if (GET_BSS_ROLE(priv) != NXPWIFI_BSS_ROLE_UAP) {
+		wiphy_lock(priv->wdev.wiphy);
+		cfg80211_rx_mlme_mgmt(priv->netdev, frame_buf, 26);
+		wiphy_unlock(priv->wdev.wiphy);
+	} else {
+		cfg80211_rx_mgmt(&priv->wdev,
+				 priv->bss_chandef.chan->center_freq,
+				 0, frame_buf, 26, 0);
+	}
+}
+
+/* This function processes the received management packet and send it
+ * to the kernel.
+ */
+int
+nxpwifi_process_mgmt_packet(struct nxpwifi_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) {
+		nxpwifi_dbg(priv->adapter, ERROR,
+			    "do not receive mgmt frames on uninitialized intf");
+		return -1;
+	}
+
+	rx_pd = (struct rxpd *)skb->data;
+	pkt_len = le16_to_cpu(rx_pd->rx_pkt_length);
+	if (pkt_len < sizeof(struct ieee80211_hdr) + sizeof(pkt_len)) {
+		nxpwifi_dbg(priv->adapter, ERROR, "invalid rx_pkt_length");
+		return -1;
+	}
+
+	skb_pull(skb, le16_to_cpu(rx_pd->rx_pkt_offset));
+	skb_pull(skb, sizeof(pkt_len));
+	pkt_len -= sizeof(pkt_len);
+
+	ieee_hdr = (void *)skb->data;
+	if (ieee80211_is_mgmt(ieee_hdr->frame_control)) {
+		if (nxpwifi_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;
+	rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
+
+	if (priv->host_mlme_reg &&
+	    (GET_BSS_ROLE(priv) != NXPWIFI_BSS_ROLE_UAP) &&
+	    (ieee80211_is_auth(ieee_hdr->frame_control) ||
+	     ieee80211_is_deauth(ieee_hdr->frame_control) ||
+	     ieee80211_is_disassoc(ieee_hdr->frame_control))) {
+		if (ieee80211_is_auth(ieee_hdr->frame_control)) {
+			if (priv->auth_flag & HOST_MLME_AUTH_PENDING) {
+				if (priv->auth_alg != WLAN_AUTH_SAE) {
+					priv->auth_flag &=
+						~HOST_MLME_AUTH_PENDING;
+					priv->auth_flag |=
+						HOST_MLME_AUTH_DONE;
+				}
+			} else {
+				return 0;
+			}
+
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "auth: receive authentication from %pM\n",
+				    ieee_hdr->addr3);
+		} else {
+			if (!priv->wdev.connected)
+				return 0;
+
+			if (ieee80211_is_deauth(ieee_hdr->frame_control)) {
+				nxpwifi_dbg(priv->adapter, MSG,
+					    "auth: receive deauth from %pM\n",
+					    ieee_hdr->addr3);
+				priv->auth_flag = 0;
+				priv->auth_alg = WLAN_AUTH_NONE;
+			} else {
+				nxpwifi_dbg(priv->adapter, MSG,
+					    "assoc: receive disassoc from %pM\n",
+					    ieee_hdr->addr3);
+			}
+		}
+
+		cfg80211_rx_mlme_mgmt(priv->netdev, skb->data, pkt_len);
+	}
+
+	if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP) {
+		if (ieee80211_is_auth(ieee_hdr->frame_control))
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "auth: receive auth from %pM\n",
+				    ieee_hdr->addr2);
+		if (ieee80211_is_deauth(ieee_hdr->frame_control))
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "auth: receive deauth from %pM\n",
+				    ieee_hdr->addr2);
+		if (ieee80211_is_disassoc(ieee_hdr->frame_control))
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "assoc: receive disassoc from %pM\n",
+				    ieee_hdr->addr2);
+		if (ieee80211_is_assoc_req(ieee_hdr->frame_control))
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "assoc: receive assoc req from %pM\n",
+				    ieee_hdr->addr2);
+		if (ieee80211_is_reassoc_req(ieee_hdr->frame_control))
+			nxpwifi_dbg(priv->adapter, MSG,
+				    "assoc: receive reassoc req from %pM\n",
+				    ieee_hdr->addr2);
+	}
+
+	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 nxpwifi_recv_packet(struct nxpwifi_private *priv, struct sk_buff *skb)
+{
+	struct nxpwifi_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) == NXPWIFI_BSS_ROLE_UAP) {
+		p_ethhdr = (void *)skb->data;
+		src_node = nxpwifi_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;
+
+	netif_rx(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 nxpwifi_complete_cmd(struct nxpwifi_adapter *adapter,
+			 struct cmd_ctrl_node *cmd_node)
+{
+	WARN_ON(!cmd_node->wait_q_enabled);
+	nxpwifi_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 nxpwifi_sta_node *
+nxpwifi_get_sta_entry(struct nxpwifi_private *priv, const u8 *mac)
+{
+	struct nxpwifi_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;
+}
+
+/* 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 nxpwifi_sta_node *
+nxpwifi_add_sta_entry(struct nxpwifi_private *priv, const u8 *mac)
+{
+	struct nxpwifi_sta_node *node;
+
+	if (!mac)
+		return NULL;
+
+	spin_lock_bh(&priv->sta_list_spinlock);
+	node = nxpwifi_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_bh(&priv->sta_list_spinlock);
+	return node;
+}
+
+/* This function will search for HT IE in association request IEs
+ * and set station HT parameters accordingly.
+ */
+void
+nxpwifi_set_sta_ht_cap(struct nxpwifi_private *priv, const u8 *ies,
+		       int ies_len, struct nxpwifi_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 ?
+				  NXPWIFI_TX_DATA_BUF_SIZE_8K :
+				  NXPWIFI_TX_DATA_BUF_SIZE_4K;
+	} else {
+		node->is_11n_enabled = 0;
+	}
+}
+
+/* This function will delete a station entry from station list */
+void nxpwifi_del_sta_entry(struct nxpwifi_private *priv, const u8 *mac)
+{
+	struct nxpwifi_sta_node *node;
+
+	spin_lock_bh(&priv->sta_list_spinlock);
+
+	node = nxpwifi_get_sta_entry(priv, mac);
+	if (node) {
+		list_del(&node->list);
+		kfree(node);
+	}
+
+	spin_unlock_bh(&priv->sta_list_spinlock);
+}
+
+/* This function will delete all stations from associated station list. */
+void nxpwifi_del_all_sta_list(struct nxpwifi_private *priv)
+{
+	struct nxpwifi_sta_node *node, *tmp;
+
+	spin_lock_bh(&priv->sta_list_spinlock);
+
+	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_bh(&priv->sta_list_spinlock);
+}
+
+/* This function adds histogram data to histogram array*/
+void nxpwifi_hist_data_add(struct nxpwifi_private *priv,
+			   u8 rx_rate, s8 snr, s8 nflr)
+{
+	struct nxpwifi_histogram_data *phist_data = priv->hist_data;
+
+	if (atomic_read(&phist_data->num_samples) > NXPWIFI_HIST_MAX_SAMPLES)
+		nxpwifi_hist_data_reset(priv);
+	nxpwifi_hist_data_set(priv, rx_rate, snr, nflr);
+}
+
+/* function to add histogram record */
+void nxpwifi_hist_data_set(struct nxpwifi_private *priv, u8 rx_rate, s8 snr,
+			   s8 nflr)
+{
+	struct nxpwifi_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 nxpwifi_hist_data_reset(struct nxpwifi_private *priv)
+{
+	int ix;
+	struct nxpwifi_histogram_data *phist_data = priv->hist_data;
+
+	atomic_set(&phist_data->num_samples, 0);
+	for (ix = 0; ix < NXPWIFI_MAX_AC_RX_RATES; ix++)
+		atomic_set(&phist_data->rx_rate[ix], 0);
+	for (ix = 0; ix < NXPWIFI_MAX_SNR; ix++)
+		atomic_set(&phist_data->snr[ix], 0);
+	for (ix = 0; ix < NXPWIFI_MAX_NOISE_FLR; ix++)
+		atomic_set(&phist_data->noise_flr[ix], 0);
+	for (ix = 0; ix < NXPWIFI_MAX_SIG_STRENGTH; ix++)
+		atomic_set(&phist_data->sig_str[ix], 0);
+}
+
+void *nxpwifi_alloc_dma_align_buf(int rx_len, gfp_t flags)
+{
+	struct sk_buff *skb;
+	int buf_len, pad;
+
+	buf_len = rx_len + NXPWIFI_RX_HEADROOM + NXPWIFI_DMA_ALIGN_SZ;
+
+	skb = __dev_alloc_skb(buf_len, flags);
+
+	if (!skb)
+		return NULL;
+
+	skb_reserve(skb, NXPWIFI_RX_HEADROOM);
+
+	pad = NXPWIFI_ALIGN_ADDR(skb->data, NXPWIFI_DMA_ALIGN_SZ) -
+	      (long)skb->data;
+
+	skb_reserve(skb, pad);
+
+	return skb;
+}
+EXPORT_SYMBOL_GPL(nxpwifi_alloc_dma_align_buf);
+
+void nxpwifi_fw_dump_event(struct nxpwifi_private *priv)
+{
+	nxpwifi_send_cmd(priv, HOST_CMD_FW_DUMP_EVENT, HOST_ACT_GEN_SET,
+			 0, NULL, true);
+}
+EXPORT_SYMBOL_GPL(nxpwifi_fw_dump_event);
+
+int nxpwifi_append_data_tlv(u16 id, u8 *data, int len, u8 *pos, u8 *cmd_end)
+{
+	struct nxpwifi_ie_types_data *tlv;
+	u16 header_len = sizeof(struct nxpwifi_ie_types_header);
+
+	if (pos + len > cmd_end)
+		return 0;
+
+	tlv = (struct nxpwifi_ie_types_data *)pos;
+	tlv->header.type = cpu_to_le16(id);
+	tlv->header.len = cpu_to_le16(len);
+	memcpy(tlv->data, data, len);
+
+	return (header_len + len);
+}
-- 
2.34.1

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