drivers/net/wireless/mwifiex/sta_cmdresp.c

/*
 * Marvell Wireless LAN device driver: station command response handling
 *
 * Copyright (C) 2011, 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"


/*
 * This function handles the command response error case.
 *
 * For scan response error, the function cancels all the pending
 * scan commands and generates an event to inform the applications
 * of the scan completion.
 *
 * For Power Save command failure, we do not retry enter PS
 * command in case of Ad-hoc mode.
 *
 * For all other response errors, the current command buffer is freed
 * and returned to the free command queue.
 */
static void
mwifiex_process_cmdresp_error(struct mwifiex_private *priv,
			      struct host_cmd_ds_command *resp)
{
	struct cmd_ctrl_node *cmd_node = NULL, *tmp_node;
	struct mwifiex_adapter *adapter = priv->adapter;
	struct host_cmd_ds_802_11_ps_mode_enh *pm;
	unsigned long flags;

	dev_err(adapter->dev, "CMD_RESP: cmd %#x error, result=%#x\n",
			resp->command, resp->result);

	if (adapter->curr_cmd->wait_q_enabled)
		adapter->cmd_wait_q.status = -1;

	switch (le16_to_cpu(resp->command)) {
	case HostCmd_CMD_802_11_PS_MODE_ENH:
		pm = &resp->params.psmode_enh;
		dev_err(adapter->dev, "PS_MODE_ENH cmd failed: "
					"result=0x%x action=0x%X\n",
				resp->result, le16_to_cpu(pm->action));
		/* We do not re-try enter-ps command in ad-hoc mode. */
		if (le16_to_cpu(pm->action) == EN_AUTO_PS &&
			(le16_to_cpu(pm->params.ps_bitmap) & BITMAP_STA_PS) &&
				priv->bss_mode == NL80211_IFTYPE_ADHOC)
			adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;

		break;
	case HostCmd_CMD_802_11_SCAN:
		/* Cancel all pending scan command */
		spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
		list_for_each_entry_safe(cmd_node, tmp_node,
					 &adapter->scan_pending_q, list) {
			list_del(&cmd_node->list);
			spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
					       flags);
			mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
			spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
		}
		spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);

		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
		adapter->scan_processing = false;
		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
		if (priv->report_scan_result)
			priv->report_scan_result = false;
		if (priv->scan_pending_on_block) {
			priv->scan_pending_on_block = false;
			up(&priv->async_sem);
		}
		break;

	case HostCmd_CMD_MAC_CONTROL:
		break;

	default:
		break;
	}
	/* Handling errors here */
	mwifiex_insert_cmd_to_free_q(adapter, adapter->curr_cmd);

	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
	adapter->curr_cmd = NULL;
	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
}

/*
 * This function handles the command response of get RSSI info.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the following parameters in driver -
 *      - Last data and beacon RSSI value
 *      - Average data and beacon RSSI value
 *      - Last data and beacon NF value
 *      - Average data and beacon NF value
 *
 * The parameters are send to the application as well, along with
 * calculated SNR values.
 */
static int mwifiex_ret_802_11_rssi_info(struct mwifiex_private *priv,
					struct host_cmd_ds_command *resp,
					struct mwifiex_ds_get_signal *signal)
{
	struct host_cmd_ds_802_11_rssi_info_rsp *rssi_info_rsp =
		&resp->params.rssi_info_rsp;

	priv->data_rssi_last = le16_to_cpu(rssi_info_rsp->data_rssi_last);
	priv->data_nf_last = le16_to_cpu(rssi_info_rsp->data_nf_last);

	priv->data_rssi_avg = le16_to_cpu(rssi_info_rsp->data_rssi_avg);
	priv->data_nf_avg = le16_to_cpu(rssi_info_rsp->data_nf_avg);

	priv->bcn_rssi_last = le16_to_cpu(rssi_info_rsp->bcn_rssi_last);
	priv->bcn_nf_last = le16_to_cpu(rssi_info_rsp->bcn_nf_last);

	priv->bcn_rssi_avg = le16_to_cpu(rssi_info_rsp->bcn_rssi_avg);
	priv->bcn_nf_avg = le16_to_cpu(rssi_info_rsp->bcn_nf_avg);

	/* Need to indicate IOCTL complete */
	if (signal) {
		memset(signal, 0, sizeof(*signal));

		signal->selector = ALL_RSSI_INFO_MASK;

		/* RSSI */
		signal->bcn_rssi_last = priv->bcn_rssi_last;
		signal->bcn_rssi_avg = priv->bcn_rssi_avg;
		signal->data_rssi_last = priv->data_rssi_last;
		signal->data_rssi_avg = priv->data_rssi_avg;

		/* SNR */
		signal->bcn_snr_last =
			CAL_SNR(priv->bcn_rssi_last, priv->bcn_nf_last);
		signal->bcn_snr_avg =
			CAL_SNR(priv->bcn_rssi_avg, priv->bcn_nf_avg);
		signal->data_snr_last =
			CAL_SNR(priv->data_rssi_last, priv->data_nf_last);
		signal->data_snr_avg =
			CAL_SNR(priv->data_rssi_avg, priv->data_nf_avg);

		/* NF */
		signal->bcn_nf_last = priv->bcn_nf_last;
		signal->bcn_nf_avg = priv->bcn_nf_avg;
		signal->data_nf_last = priv->data_nf_last;
		signal->data_nf_avg = priv->data_nf_avg;
	}

	return 0;
}

/*
 * This function handles the command response of set/get SNMP
 * MIB parameters.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the parameter in driver.
 *
 * The following parameters are supported -
 *      - Fragmentation threshold
 *      - RTS threshold
 *      - Short retry limit
 */
static int mwifiex_ret_802_11_snmp_mib(struct mwifiex_private *priv,
				       struct host_cmd_ds_command *resp,
				       u32 *data_buf)
{
	struct host_cmd_ds_802_11_snmp_mib *smib = &resp->params.smib;
	u16 oid = le16_to_cpu(smib->oid);
	u16 query_type = le16_to_cpu(smib->query_type);
	u32 ul_temp;

	dev_dbg(priv->adapter->dev, "info: SNMP_RESP: oid value = %#x,"
			" query_type = %#x, buf size = %#x\n",
			oid, query_type, le16_to_cpu(smib->buf_size));
	if (query_type == HostCmd_ACT_GEN_GET) {
		ul_temp = le16_to_cpu(*((__le16 *) (smib->value)));
		if (data_buf)
			*data_buf = ul_temp;
		switch (oid) {
		case FRAG_THRESH_I:
			dev_dbg(priv->adapter->dev,
				"info: SNMP_RESP: FragThsd =%u\n", ul_temp);
			break;
		case RTS_THRESH_I:
			dev_dbg(priv->adapter->dev,
				"info: SNMP_RESP: RTSThsd =%u\n", ul_temp);
			break;
		case SHORT_RETRY_LIM_I:
			dev_dbg(priv->adapter->dev,
				"info: SNMP_RESP: TxRetryCount=%u\n", ul_temp);
			break;
		case DTIM_PERIOD_I:
			dev_dbg(priv->adapter->dev,
				"info: SNMP_RESP: DTIM period=%u\n", ul_temp);
		default:
			break;
		}
	}

	return 0;
}

/*
 * This function handles the command response of get log request
 *
 * Handling includes changing the header fields into CPU format
 * and sending the received parameters to application.
 */
static int mwifiex_ret_get_log(struct mwifiex_private *priv,
			       struct host_cmd_ds_command *resp,
			       struct mwifiex_ds_get_stats *stats)
{
	struct host_cmd_ds_802_11_get_log *get_log =
		(struct host_cmd_ds_802_11_get_log *) &resp->params.get_log;

	if (stats) {
		stats->mcast_tx_frame = le32_to_cpu(get_log->mcast_tx_frame);
		stats->failed = le32_to_cpu(get_log->failed);
		stats->retry = le32_to_cpu(get_log->retry);
		stats->multi_retry = le32_to_cpu(get_log->multi_retry);
		stats->frame_dup = le32_to_cpu(get_log->frame_dup);
		stats->rts_success = le32_to_cpu(get_log->rts_success);
		stats->rts_failure = le32_to_cpu(get_log->rts_failure);
		stats->ack_failure = le32_to_cpu(get_log->ack_failure);
		stats->rx_frag = le32_to_cpu(get_log->rx_frag);
		stats->mcast_rx_frame = le32_to_cpu(get_log->mcast_rx_frame);
		stats->fcs_error = le32_to_cpu(get_log->fcs_error);
		stats->tx_frame = le32_to_cpu(get_log->tx_frame);
		stats->wep_icv_error[0] =
			le32_to_cpu(get_log->wep_icv_err_cnt[0]);
		stats->wep_icv_error[1] =
			le32_to_cpu(get_log->wep_icv_err_cnt[1]);
		stats->wep_icv_error[2] =
			le32_to_cpu(get_log->wep_icv_err_cnt[2]);
		stats->wep_icv_error[3] =
			le32_to_cpu(get_log->wep_icv_err_cnt[3]);
	}

	return 0;
}

/*
 * This function handles the command response of set/get Tx rate
 * configurations.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the following parameters in driver -
 *      - DSSS rate bitmap
 *      - OFDM rate bitmap
 *      - HT MCS rate bitmaps
 *
 * Based on the new rate bitmaps, the function re-evaluates if
 * auto data rate has been activated. If not, it sends another
 * query to the firmware to get the current Tx data rate and updates
 * the driver value.
 */
static int mwifiex_ret_tx_rate_cfg(struct mwifiex_private *priv,
				   struct host_cmd_ds_command *resp,
				   struct mwifiex_rate_cfg *ds_rate)
{
	struct host_cmd_ds_tx_rate_cfg *rate_cfg = &resp->params.tx_rate_cfg;
	struct mwifiex_rate_scope *rate_scope;
	struct mwifiex_ie_types_header *head;
	u16 tlv, tlv_buf_len;
	u8 *tlv_buf;
	u32 i;
	int ret = 0;

	tlv_buf = (u8 *) ((u8 *) rate_cfg) +
			sizeof(struct host_cmd_ds_tx_rate_cfg);
	tlv_buf_len = *(u16 *) (tlv_buf + sizeof(u16));

	while (tlv_buf && tlv_buf_len > 0) {
		tlv = (*tlv_buf);
		tlv = tlv | (*(tlv_buf + 1) << 8);

		switch (tlv) {
		case TLV_TYPE_RATE_SCOPE:
			rate_scope = (struct mwifiex_rate_scope *) tlv_buf;
			priv->bitmap_rates[0] =
				le16_to_cpu(rate_scope->hr_dsss_rate_bitmap);
			priv->bitmap_rates[1] =
				le16_to_cpu(rate_scope->ofdm_rate_bitmap);
			for (i = 0;
			     i <
			     sizeof(rate_scope->ht_mcs_rate_bitmap) /
			     sizeof(u16); i++)
				priv->bitmap_rates[2 + i] =
					le16_to_cpu(rate_scope->
						    ht_mcs_rate_bitmap[i]);
			break;
			/* Add RATE_DROP tlv here */
		}

		head = (struct mwifiex_ie_types_header *) tlv_buf;
		tlv_buf += le16_to_cpu(head->len) + sizeof(*head);
		tlv_buf_len -= le16_to_cpu(head->len);
	}

	priv->is_data_rate_auto = mwifiex_is_rate_auto(priv);

	if (priv->is_data_rate_auto)
		priv->data_rate = 0;
	else
		ret = mwifiex_send_cmd_async(priv,
					  HostCmd_CMD_802_11_TX_RATE_QUERY,
					  HostCmd_ACT_GEN_GET, 0, NULL);

	if (ds_rate) {
		if (le16_to_cpu(rate_cfg->action) == HostCmd_ACT_GEN_GET) {
			if (priv->is_data_rate_auto) {
				ds_rate->is_rate_auto = 1;
			} else {
				ds_rate->rate = mwifiex_get_rate_index(priv->
							       bitmap_rates,
							       sizeof(priv->
							       bitmap_rates));
				if (ds_rate->rate >=
				    MWIFIEX_RATE_BITMAP_OFDM0
				    && ds_rate->rate <=
				    MWIFIEX_RATE_BITMAP_OFDM7)
					ds_rate->rate -=
						(MWIFIEX_RATE_BITMAP_OFDM0 -
						 MWIFIEX_RATE_INDEX_OFDM0);
				if (ds_rate->rate >=
				    MWIFIEX_RATE_BITMAP_MCS0
				    && ds_rate->rate <=
				    MWIFIEX_RATE_BITMAP_MCS127)
					ds_rate->rate -=
						(MWIFIEX_RATE_BITMAP_MCS0 -
						 MWIFIEX_RATE_INDEX_MCS0);
			}
		}
	}

	return ret;
}

/*
 * This function handles the command response of get Tx power level.
 *
 * Handling includes saving the maximum and minimum Tx power levels
 * in driver, as well as sending the values to user.
 */
static int mwifiex_get_power_level(struct mwifiex_private *priv, void *data_buf)
{
	int length, max_power = -1, min_power = -1;
	struct mwifiex_types_power_group *pg_tlv_hdr;
	struct mwifiex_power_group *pg;

	if (data_buf) {
		pg_tlv_hdr =
			(struct mwifiex_types_power_group *) ((u8 *) data_buf
					+ sizeof(struct host_cmd_ds_txpwr_cfg));
		pg = (struct mwifiex_power_group *) ((u8 *) pg_tlv_hdr +
				sizeof(struct mwifiex_types_power_group));
		length = pg_tlv_hdr->length;
		if (length > 0) {
			max_power = pg->power_max;
			min_power = pg->power_min;
			length -= sizeof(struct mwifiex_power_group);
		}
		while (length) {
			pg++;
			if (max_power < pg->power_max)
				max_power = pg->power_max;

			if (min_power > pg->power_min)
				min_power = pg->power_min;

			length -= sizeof(struct mwifiex_power_group);
		}
		if (pg_tlv_hdr->length > 0) {
			priv->min_tx_power_level = (u8) min_power;
			priv->max_tx_power_level = (u8) max_power;
		}
	} else {
		return -1;
	}

	return 0;
}

/*
 * This function handles the command response of set/get Tx power
 * configurations.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the current Tx power level in driver.
 */
static int mwifiex_ret_tx_power_cfg(struct mwifiex_private *priv,
				    struct host_cmd_ds_command *resp)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct host_cmd_ds_txpwr_cfg *txp_cfg = &resp->params.txp_cfg;
	struct mwifiex_types_power_group *pg_tlv_hdr;
	struct mwifiex_power_group *pg;
	u16 action = le16_to_cpu(txp_cfg->action);

	switch (action) {
	case HostCmd_ACT_GEN_GET:
		pg_tlv_hdr = (struct mwifiex_types_power_group *)
			((u8 *) txp_cfg +
			 sizeof(struct host_cmd_ds_txpwr_cfg));

		pg = (struct mwifiex_power_group *)
			((u8 *) pg_tlv_hdr +
			 sizeof(struct mwifiex_types_power_group));

		if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
			mwifiex_get_power_level(priv, txp_cfg);

		priv->tx_power_level = (u16) pg->power_min;
		break;

	case HostCmd_ACT_GEN_SET:
		if (!le32_to_cpu(txp_cfg->mode))
			break;

		pg_tlv_hdr = (struct mwifiex_types_power_group *)
			((u8 *) txp_cfg +
			 sizeof(struct host_cmd_ds_txpwr_cfg));

		pg = (struct mwifiex_power_group *)
			((u8 *) pg_tlv_hdr +
			 sizeof(struct mwifiex_types_power_group));

		if (pg->power_max == pg->power_min)
			priv->tx_power_level = (u16) pg->power_min;
		break;
	default:
		dev_err(adapter->dev, "CMD_RESP: unknown cmd action %d\n",
				action);
		return 0;
	}
	dev_dbg(adapter->dev,
		"info: Current TxPower Level = %d, Max Power=%d, Min Power=%d\n",
	       priv->tx_power_level, priv->max_tx_power_level,
	       priv->min_tx_power_level);

	return 0;
}

/*
 * This function handles the command response of set/get MAC address.
 *
 * Handling includes saving the MAC address in driver.
 */
static int mwifiex_ret_802_11_mac_address(struct mwifiex_private *priv,
					  struct host_cmd_ds_command *resp)
{
	struct host_cmd_ds_802_11_mac_address *cmd_mac_addr =
		&resp->params.mac_addr;

	memcpy(priv->curr_addr, cmd_mac_addr->mac_addr, ETH_ALEN);

	dev_dbg(priv->adapter->dev,
		"info: set mac address: %pM\n", priv->curr_addr);

	return 0;
}

/*
 * This function handles the command response of set/get MAC multicast
 * address.
 */
static int mwifiex_ret_mac_multicast_adr(struct mwifiex_private *priv,
					 struct host_cmd_ds_command *resp)
{
	return 0;
}

/*
 * This function handles the command response of get Tx rate query.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the Tx rate and HT information parameters in driver.
 *
 * Both rate configuration and current data rate can be retrieved
 * with this request.
 */
static int mwifiex_ret_802_11_tx_rate_query(struct mwifiex_private *priv,
					    struct host_cmd_ds_command *resp)
{
	priv->tx_rate = resp->params.tx_rate.tx_rate;
	priv->tx_htinfo = resp->params.tx_rate.ht_info;
	if (!priv->is_data_rate_auto)
		priv->data_rate =
			mwifiex_index_to_data_rate(priv, priv->tx_rate,
						   priv->tx_htinfo);

	return 0;
}

/*
 * This function handles the command response of a deauthenticate
 * command.
 *
 * If the deauthenticated MAC matches the current BSS MAC, the connection
 * state is reset.
 */
static int mwifiex_ret_802_11_deauthenticate(struct mwifiex_private *priv,
					     struct host_cmd_ds_command *resp)
{
	struct mwifiex_adapter *adapter = priv->adapter;

	adapter->dbg.num_cmd_deauth++;
	if (!memcmp(resp->params.deauth.mac_addr,
		    &priv->curr_bss_params.bss_descriptor.mac_address,
		    sizeof(resp->params.deauth.mac_addr)))
		mwifiex_reset_connect_state(priv);

	return 0;
}

/*
 * This function handles the command response of ad-hoc stop.
 *
 * The function resets the connection state in driver.
 */
static int mwifiex_ret_802_11_ad_hoc_stop(struct mwifiex_private *priv,
					  struct host_cmd_ds_command *resp)
{
	mwifiex_reset_connect_state(priv);
	return 0;
}

/*
 * This function handles the command response of set/get key material.
 *
 * Handling includes updating the driver parameters to reflect the
 * changes.
 */
static int mwifiex_ret_802_11_key_material(struct mwifiex_private *priv,
					   struct host_cmd_ds_command *resp)
{
	struct host_cmd_ds_802_11_key_material *key =
		&resp->params.key_material;

	if (le16_to_cpu(key->action) == HostCmd_ACT_GEN_SET) {
		if ((le16_to_cpu(key->key_param_set.key_info) & KEY_MCAST)) {
			dev_dbg(priv->adapter->dev, "info: key: GTK is set\n");
			priv->wpa_is_gtk_set = true;
			priv->scan_block = false;
		}
	}

	memset(priv->aes_key.key_param_set.key, 0,
	       sizeof(key->key_param_set.key));
	priv->aes_key.key_param_set.key_len = key->key_param_set.key_len;
	memcpy(priv->aes_key.key_param_set.key, key->key_param_set.key,
	       le16_to_cpu(priv->aes_key.key_param_set.key_len));

	return 0;
}

/*
 * This function handles the command response of get 11d domain information.
 */
static int mwifiex_ret_802_11d_domain_info(struct mwifiex_private *priv,
					   struct host_cmd_ds_command *resp)
{
	struct host_cmd_ds_802_11d_domain_info_rsp *domain_info =
		&resp->params.domain_info_resp;
	struct mwifiex_ietypes_domain_param_set *domain = &domain_info->domain;
	u16 action = le16_to_cpu(domain_info->action);
	u8 no_of_triplet;

	no_of_triplet = (u8) ((le16_to_cpu(domain->header.len) -
					IEEE80211_COUNTRY_STRING_LEN) /
				sizeof(struct ieee80211_country_ie_triplet));

	dev_dbg(priv->adapter->dev, "info: 11D Domain Info Resp:"
			" no_of_triplet=%d\n", no_of_triplet);

	if (no_of_triplet > MWIFIEX_MAX_TRIPLET_802_11D) {
		dev_warn(priv->adapter->dev,
			"11D: invalid number of triplets %d "
			"returned!!\n", no_of_triplet);
		return -1;
	}

	switch (action) {
	case HostCmd_ACT_GEN_SET:  /* Proc Set Action */
		break;
	case HostCmd_ACT_GEN_GET:
		break;
	default:
		dev_err(priv->adapter->dev,
			"11D: invalid action:%d\n", domain_info->action);
		return -1;
	}

	return 0;
}

/*
 * This function handles the command response of get RF channel.
 *
 * Handling includes changing the header fields into CPU format
 * and saving the new channel in driver.
 */
static int mwifiex_ret_802_11_rf_channel(struct mwifiex_private *priv,
					 struct host_cmd_ds_command *resp,
					 u16 *data_buf)
{
	struct host_cmd_ds_802_11_rf_channel *rf_channel =
		&resp->params.rf_channel;
	u16 new_channel = le16_to_cpu(rf_channel->current_channel);

	if (priv->curr_bss_params.bss_descriptor.channel != new_channel) {
		dev_dbg(priv->adapter->dev, "cmd: Channel Switch: %d to %d\n",
		       priv->curr_bss_params.bss_descriptor.channel,
		       new_channel);
		/* Update the channel again */
		priv->curr_bss_params.bss_descriptor.channel = new_channel;
	}

	if (data_buf)
		*data_buf = new_channel;

	return 0;
}

/*
 * This function handles the command response of get extended version.
 *
 * Handling includes forming the extended version string and sending it
 * to application.
 */
static int mwifiex_ret_ver_ext(struct mwifiex_private *priv,
			       struct host_cmd_ds_command *resp,
			       struct host_cmd_ds_version_ext *version_ext)
{
	struct host_cmd_ds_version_ext *ver_ext = &resp->params.verext;

	if (version_ext) {
		version_ext->version_str_sel = ver_ext->version_str_sel;
		memcpy(version_ext->version_str, ver_ext->version_str,
		       sizeof(char) * 128);
		memcpy(priv->version_str, ver_ext->version_str, 128);
	}
	return 0;
}

/*
 * This function handles the command response of register access.
 *
 * The register value and offset are returned to the user. For EEPROM
 * access, the byte count is also returned.
 */
static int mwifiex_ret_reg_access(u16 type, struct host_cmd_ds_command *resp,
				  void *data_buf)
{
	struct mwifiex_ds_reg_rw *reg_rw;
	struct mwifiex_ds_read_eeprom *eeprom;
	union reg {
		struct host_cmd_ds_mac_reg_access *mac;
		struct host_cmd_ds_bbp_reg_access *bbp;
		struct host_cmd_ds_rf_reg_access *rf;
		struct host_cmd_ds_pmic_reg_access *pmic;
		struct host_cmd_ds_802_11_eeprom_access *eeprom;
	} r;

	if (!data_buf)
		return 0;

	reg_rw = data_buf;
	eeprom = data_buf;
	switch (type) {
	case HostCmd_CMD_MAC_REG_ACCESS:
		r.mac = (struct host_cmd_ds_mac_reg_access *)
			&resp->params.mac_reg;
		reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.mac->offset));
		reg_rw->value = r.mac->value;
		break;
	case HostCmd_CMD_BBP_REG_ACCESS:
		r.bbp = (struct host_cmd_ds_bbp_reg_access *)
			&resp->params.bbp_reg;
		reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.bbp->offset));
		reg_rw->value = cpu_to_le32((u32) r.bbp->value);
		break;

	case HostCmd_CMD_RF_REG_ACCESS:
		r.rf = (struct host_cmd_ds_rf_reg_access *)
		       &resp->params.rf_reg;
		reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.rf->offset));
		reg_rw->value = cpu_to_le32((u32) r.bbp->value);
		break;
	case HostCmd_CMD_PMIC_REG_ACCESS:
		r.pmic = (struct host_cmd_ds_pmic_reg_access *)
			 &resp->params.pmic_reg;
		reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.pmic->offset));
		reg_rw->value = cpu_to_le32((u32) r.pmic->value);
		break;
	case HostCmd_CMD_CAU_REG_ACCESS:
		r.rf = (struct host_cmd_ds_rf_reg_access *)
		       &resp->params.rf_reg;
		reg_rw->offset = cpu_to_le32((u32) le16_to_cpu(r.rf->offset));
		reg_rw->value = cpu_to_le32((u32) r.rf->value);
		break;
	case HostCmd_CMD_802_11_EEPROM_ACCESS:
		r.eeprom = (struct host_cmd_ds_802_11_eeprom_access *)
			   &resp->params.eeprom;
		pr_debug("info: EEPROM read len=%x\n", r.eeprom->byte_count);
		if (le16_to_cpu(eeprom->byte_count) <
		    le16_to_cpu(r.eeprom->byte_count)) {
			eeprom->byte_count = cpu_to_le16(0);
			pr_debug("info: EEPROM read length is too big\n");
			return -1;
		}
		eeprom->offset = r.eeprom->offset;
		eeprom->byte_count = r.eeprom->byte_count;
		if (le16_to_cpu(eeprom->byte_count) > 0)
			memcpy(&eeprom->value, &r.eeprom->value,
			       le16_to_cpu(r.eeprom->byte_count));

		break;
	default:
		return -1;
	}
	return 0;
}

/*
 * This function handles the command response of get IBSS coalescing status.
 *
 * If the received BSSID is different than the current one, the current BSSID,
 * beacon interval, ATIM window and ERP information are updated, along with
 * changing the ad-hoc state accordingly.
 */
static int mwifiex_ret_ibss_coalescing_status(struct mwifiex_private *priv,
					      struct host_cmd_ds_command *resp)
{
	struct host_cmd_ds_802_11_ibss_status *ibss_coal_resp =
		&(resp->params.ibss_coalescing);
	u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };

	if (le16_to_cpu(ibss_coal_resp->action) == HostCmd_ACT_GEN_SET)
		return 0;

	dev_dbg(priv->adapter->dev,
		"info: new BSSID %pM\n", ibss_coal_resp->bssid);

	/* If rsp has NULL BSSID, Just return..... No Action */
	if (!memcmp(ibss_coal_resp->bssid, zero_mac, ETH_ALEN)) {
		dev_warn(priv->adapter->dev, "new BSSID is NULL\n");
		return 0;
	}

	/* If BSSID is diff, modify current BSS parameters */
	if (memcmp(priv->curr_bss_params.bss_descriptor.mac_address,
		   ibss_coal_resp->bssid, ETH_ALEN)) {
		/* BSSID */
		memcpy(priv->curr_bss_params.bss_descriptor.mac_address,
		       ibss_coal_resp->bssid, ETH_ALEN);

		/* Beacon Interval */
		priv->curr_bss_params.bss_descriptor.beacon_period
			= le16_to_cpu(ibss_coal_resp->beacon_interval);

		/* ERP Information */
		priv->curr_bss_params.bss_descriptor.erp_flags =
			(u8) le16_to_cpu(ibss_coal_resp->use_g_rate_protect);

		priv->adhoc_state = ADHOC_COALESCED;
	}

	return 0;
}

/*
 * This function handles the command responses.
 *
 * This is a generic function, which calls command specific
 * response handlers based on the command ID.
 */
int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
				struct host_cmd_ds_command *resp)
{
	int ret = 0;
	struct mwifiex_adapter *adapter = priv->adapter;
	void *data_buf = adapter->curr_cmd->data_buf;

	/* If the command is not successful, cleanup and return failure */
	if (resp->result != HostCmd_RESULT_OK) {
		mwifiex_process_cmdresp_error(priv, resp);
		return -1;
	}
	/* Command successful, handle response */
	switch (cmdresp_no) {
	case HostCmd_CMD_GET_HW_SPEC:
		ret = mwifiex_ret_get_hw_spec(priv, resp);
		break;
	case HostCmd_CMD_MAC_CONTROL:
		break;
	case HostCmd_CMD_802_11_MAC_ADDRESS:
		ret = mwifiex_ret_802_11_mac_address(priv, resp);
		break;
	case HostCmd_CMD_MAC_MULTICAST_ADR:
		ret = mwifiex_ret_mac_multicast_adr(priv, resp);
		break;
	case HostCmd_CMD_TX_RATE_CFG:
		ret = mwifiex_ret_tx_rate_cfg(priv, resp, data_buf);
		break;
	case HostCmd_CMD_802_11_SCAN:
		ret = mwifiex_ret_802_11_scan(priv, resp);
		adapter->curr_cmd->wait_q_enabled = false;
		break;
	case HostCmd_CMD_802_11_BG_SCAN_QUERY:
		ret = mwifiex_ret_802_11_scan(priv, resp);
		dev_dbg(adapter->dev,
			"info: CMD_RESP: BG_SCAN result is ready!\n");
		break;
	case HostCmd_CMD_TXPWR_CFG:
		ret = mwifiex_ret_tx_power_cfg(priv, resp);
		break;
	case HostCmd_CMD_802_11_PS_MODE_ENH:
		ret = mwifiex_ret_enh_power_mode(priv, resp, data_buf);
		break;
	case HostCmd_CMD_802_11_HS_CFG_ENH:
		ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
		break;
	case HostCmd_CMD_802_11_ASSOCIATE:
		ret = mwifiex_ret_802_11_associate(priv, resp);
		break;
	case HostCmd_CMD_802_11_DEAUTHENTICATE:
		ret = mwifiex_ret_802_11_deauthenticate(priv, resp);
		break;
	case HostCmd_CMD_802_11_AD_HOC_START:
	case HostCmd_CMD_802_11_AD_HOC_JOIN:
		ret = mwifiex_ret_802_11_ad_hoc(priv, resp);
		break;
	case HostCmd_CMD_802_11_AD_HOC_STOP:
		ret = mwifiex_ret_802_11_ad_hoc_stop(priv, resp);
		break;
	case HostCmd_CMD_802_11_GET_LOG:
		ret = mwifiex_ret_get_log(priv, resp, data_buf);
		break;
	case HostCmd_CMD_RSSI_INFO:
		ret = mwifiex_ret_802_11_rssi_info(priv, resp, data_buf);
		break;
	case HostCmd_CMD_802_11_SNMP_MIB:
		ret = mwifiex_ret_802_11_snmp_mib(priv, resp, data_buf);
		break;
	case HostCmd_CMD_802_11_TX_RATE_QUERY:
		ret = mwifiex_ret_802_11_tx_rate_query(priv, resp);
		break;
	case HostCmd_CMD_802_11_RF_CHANNEL:
		ret = mwifiex_ret_802_11_rf_channel(priv, resp, data_buf);
		break;
	case HostCmd_CMD_VERSION_EXT:
		ret = mwifiex_ret_ver_ext(priv, resp, data_buf);
		break;
	case HostCmd_CMD_FUNC_INIT:
	case HostCmd_CMD_FUNC_SHUTDOWN:
		break;
	case HostCmd_CMD_802_11_KEY_MATERIAL:
		ret = mwifiex_ret_802_11_key_material(priv, resp);
		break;
	case HostCmd_CMD_802_11D_DOMAIN_INFO:
		ret = mwifiex_ret_802_11d_domain_info(priv, resp);
		break;
	case HostCmd_CMD_11N_ADDBA_REQ:
		ret = mwifiex_ret_11n_addba_req(priv, resp);
		break;
	case HostCmd_CMD_11N_DELBA:
		ret = mwifiex_ret_11n_delba(priv, resp);
		break;
	case HostCmd_CMD_11N_ADDBA_RSP:
		ret = mwifiex_ret_11n_addba_resp(priv, resp);
		break;
	case HostCmd_CMD_RECONFIGURE_TX_BUFF:
		adapter->tx_buf_size = (u16) le16_to_cpu(resp->params.
							     tx_buf.buff_size);
		adapter->tx_buf_size = (adapter->tx_buf_size /
						MWIFIEX_SDIO_BLOCK_SIZE) *
						MWIFIEX_SDIO_BLOCK_SIZE;
		adapter->curr_tx_buf_size = adapter->tx_buf_size;
		dev_dbg(adapter->dev,
			"cmd: max_tx_buf_size=%d, tx_buf_size=%d\n",
		       adapter->max_tx_buf_size, adapter->tx_buf_size);

		if (adapter->if_ops.update_mp_end_port)
			adapter->if_ops.update_mp_end_port(adapter,
					le16_to_cpu(resp->
						params.
						tx_buf.
						mp_end_port));
		break;
	case HostCmd_CMD_AMSDU_AGGR_CTRL:
		ret = mwifiex_ret_amsdu_aggr_ctrl(resp, data_buf);
		break;
	case HostCmd_CMD_WMM_GET_STATUS:
		ret = mwifiex_ret_wmm_get_status(priv, resp);
		break;
	case HostCmd_CMD_802_11_IBSS_COALESCING_STATUS:
		ret = mwifiex_ret_ibss_coalescing_status(priv, resp);
		break;
	case HostCmd_CMD_MAC_REG_ACCESS:
	case HostCmd_CMD_BBP_REG_ACCESS:
	case HostCmd_CMD_RF_REG_ACCESS:
	case HostCmd_CMD_PMIC_REG_ACCESS:
	case HostCmd_CMD_CAU_REG_ACCESS:
	case HostCmd_CMD_802_11_EEPROM_ACCESS:
		ret = mwifiex_ret_reg_access(cmdresp_no, resp, data_buf);
		break;
	case HostCmd_CMD_SET_BSS_MODE:
		break;
	case HostCmd_CMD_11N_CFG:
		ret = mwifiex_ret_11n_cfg(resp, data_buf);
		break;
	case HostCmd_CMD_PCIE_DESC_DETAILS:
		break;
	default:
		dev_err(adapter->dev, "CMD_RESP: unknown cmd response %#x\n",
		       resp->command);
		break;
	}

	return ret;
}