/*
   * Marvell Wireless LAN device driver: commands and events
   *
   * 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"
  #include "11ac.h"
  
  /*
   * This function initializes a command node.
   *
   * The actual allocation of the node is not done by this function. It only
   * initiates a node by filling it with default parameters. Similarly,
   * allocation of the different buffers used (IOCTL buffer, data buffer) are
   * not done by this function either.
   */
  static void
  mwifiex_init_cmd_node(struct mwifiex_private *priv,
  		      struct cmd_ctrl_node *cmd_node,
  		      u32 cmd_oid, void *data_buf, bool sync)
  {
  	cmd_node->priv = priv;
  	cmd_node->cmd_oid = cmd_oid;
  	if (sync) {
  		cmd_node->wait_q_enabled = true;
  		cmd_node->cmd_wait_q_woken = false;
  		cmd_node->condition = &cmd_node->cmd_wait_q_woken;
  	}
  	cmd_node->data_buf = data_buf;
  	cmd_node->cmd_skb = cmd_node->skb;
  }
  
  /*
   * This function returns a command node from the free queue depending upon
   * availability.
   */
  static struct cmd_ctrl_node *
  mwifiex_get_cmd_node(struct mwifiex_adapter *adapter)
  {
  	struct cmd_ctrl_node *cmd_node;
  	unsigned long flags;
  
  	spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
  	if (list_empty(&adapter->cmd_free_q)) {
  		mwifiex_dbg(adapter, ERROR,
  			    "GET_CMD_NODE: cmd node not available
  ");
  		spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
  		return NULL;
  	}
  	cmd_node = list_first_entry(&adapter->cmd_free_q,
  				    struct cmd_ctrl_node, list);
  	list_del(&cmd_node->list);
  	spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
  
  	return cmd_node;
  }
  
  /*
   * This function cleans up a command node.
   *
   * The function resets the fields including the buffer pointers.
   * This function does not try to free the buffers. They must be
   * freed before calling this function.
   *
   * This function will however call the receive completion callback
   * in case a response buffer is still available before resetting
   * the pointer.
   */
  static void
  mwifiex_clean_cmd_node(struct mwifiex_adapter *adapter,
  		       struct cmd_ctrl_node *cmd_node)
  {
  	cmd_node->cmd_oid = 0;
  	cmd_node->cmd_flag = 0;
  	cmd_node->data_buf = NULL;
  	cmd_node->wait_q_enabled = false;
  
  	if (cmd_node->cmd_skb)
  		skb_trim(cmd_node->cmd_skb, 0);
  
  	if (cmd_node->resp_skb) {
  		adapter->if_ops.cmdrsp_complete(adapter, cmd_node->resp_skb);
  		cmd_node->resp_skb = NULL;
  	}
  }
  
  /*
   * This function sends a host command to the firmware.
   *
   * The function copies the host command into the driver command
   * buffer, which will be transferred to the firmware later by the
   * main thread.
   */
  static int mwifiex_cmd_host_cmd(struct mwifiex_private *priv,
  				struct host_cmd_ds_command *cmd,
  				struct mwifiex_ds_misc_cmd *pcmd_ptr)
  {
  	/* Copy the HOST command to command buffer */
  	memcpy(cmd, pcmd_ptr->cmd, pcmd_ptr->len);
  	mwifiex_dbg(priv->adapter, CMD,
  		    "cmd: host cmd size = %d
  ", pcmd_ptr->len);
  	return 0;
  }
  
  /*
   * This function downloads a command to the firmware.
   *
   * The function performs sanity tests, sets the command sequence
   * number and size, converts the header fields to CPU format before
   * sending. Afterwards, it logs the command ID and action for debugging
   * and sets up the command timeout timer.
   */
  static int mwifiex_dnld_cmd_to_fw(struct mwifiex_private *priv,
  				  struct cmd_ctrl_node *cmd_node)
  {
  
  	struct mwifiex_adapter *adapter = priv->adapter;
  	int ret;
  	struct host_cmd_ds_command *host_cmd;
  	uint16_t cmd_code;
  	uint16_t cmd_size;
  	unsigned long flags;
  	__le32 tmp;
  
  	if (!adapter || !cmd_node)
  		return -1;
  
  	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
  
  	/* Sanity test */
  	if (host_cmd == NULL || host_cmd->size == 0) {
  		mwifiex_dbg(adapter, ERROR,
  			    "DNLD_CMD: host_cmd is null\t"
  			    "or cmd size is 0, not sending
  ");
  		if (cmd_node->wait_q_enabled)
  			adapter->cmd_wait_q.status = -1;
  		mwifiex_recycle_cmd_node(adapter, cmd_node);
  		return -1;
  	}
  
  	cmd_code = le16_to_cpu(host_cmd->command);
  	cmd_size = le16_to_cpu(host_cmd->size);
  
  	if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET &&
  	    cmd_code != HostCmd_CMD_FUNC_SHUTDOWN &&
  	    cmd_code != HostCmd_CMD_FUNC_INIT) {
  		mwifiex_dbg(adapter, ERROR,
  			    "DNLD_CMD: FW in reset state, ignore cmd %#x
  ",
  			cmd_code);
  		mwifiex_recycle_cmd_node(adapter, cmd_node);
  		queue_work(adapter->workqueue, &adapter->main_work);
  		return -1;
  	}
  
  	/* Set command sequence number */
  	adapter->seq_num++;
  	host_cmd->seq_num = cpu_to_le16(HostCmd_SET_SEQ_NO_BSS_INFO
  					(adapter->seq_num,
  					 cmd_node->priv->bss_num,
  					 cmd_node->priv->bss_type));
  
  	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  	adapter->curr_cmd = cmd_node;
  	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  
  	/* Adjust skb length */
  	if (cmd_node->cmd_skb->len > cmd_size)
  		/*
  		 * cmd_size is less than sizeof(struct host_cmd_ds_command).
  		 * Trim off the unused portion.
  		 */
  		skb_trim(cmd_node->cmd_skb, cmd_size);
  	else if (cmd_node->cmd_skb->len < cmd_size)
  		/*
  		 * cmd_size is larger than sizeof(struct host_cmd_ds_command)
  		 * because we have appended custom IE TLV. Increase skb length
  		 * accordingly.
  		 */
  		skb_put(cmd_node->cmd_skb, cmd_size - cmd_node->cmd_skb->len);
  
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x
  ",
  		    cmd_code,
  		    le16_to_cpu(*(__le16 *)((u8 *)host_cmd + S_DS_GEN)),
  		    cmd_size, le16_to_cpu(host_cmd->seq_num));
  	mwifiex_dbg_dump(adapter, CMD_D, "cmd buffer:", host_cmd, cmd_size);
  
  	if (adapter->iface_type == MWIFIEX_USB) {
  		tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
  		skb_push(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
  		memcpy(cmd_node->cmd_skb->data, &tmp, MWIFIEX_TYPE_LEN);
  		adapter->cmd_sent = true;
  		ret = adapter->if_ops.host_to_card(adapter,
  						   MWIFIEX_USB_EP_CMD_EVENT,
  						   cmd_node->cmd_skb, NULL);
  		skb_pull(cmd_node->cmd_skb, MWIFIEX_TYPE_LEN);
  		if (ret == -EBUSY)
  			cmd_node->cmd_skb = NULL;
  	} else {
  		skb_push(cmd_node->cmd_skb, INTF_HEADER_LEN);
  		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
  						   cmd_node->cmd_skb, NULL);
  		skb_pull(cmd_node->cmd_skb, INTF_HEADER_LEN);
  	}
  
  	if (ret == -1) {
  		mwifiex_dbg(adapter, ERROR,
  			    "DNLD_CMD: host to card failed
  ");
  		if (adapter->iface_type == MWIFIEX_USB)
  			adapter->cmd_sent = false;
  		if (cmd_node->wait_q_enabled)
  			adapter->cmd_wait_q.status = -1;
  		mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
  
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  		adapter->curr_cmd = NULL;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  
  		adapter->dbg.num_cmd_host_to_card_failure++;
  		return -1;
  	}
  
  	/* Save the last command id and action to debug log */
  	adapter->dbg.last_cmd_index =
  			(adapter->dbg.last_cmd_index + 1) % DBG_CMD_NUM;
  	adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index] = cmd_code;
  	adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index] =
  			le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN));
  
  	/* Clear BSS_NO_BITS from HostCmd */
  	cmd_code &= HostCmd_CMD_ID_MASK;
  
  	/* Setup the timer after transmit command */
  	mod_timer(&adapter->cmd_timer,
  		  jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
  
  	return 0;
  }
  
  /*
   * This function downloads a sleep confirm command to the firmware.
   *
   * The function performs sanity tests, sets the command sequence
   * number and size, converts the header fields to CPU format before
   * sending.
   *
   * No responses are needed for sleep confirm command.
   */
  static int mwifiex_dnld_sleep_confirm_cmd(struct mwifiex_adapter *adapter)
  {
  	int ret;
  	struct mwifiex_private *priv;
  	struct mwifiex_opt_sleep_confirm *sleep_cfm_buf =
  				(struct mwifiex_opt_sleep_confirm *)
  						adapter->sleep_cfm->data;
  	struct sk_buff *sleep_cfm_tmp;
  	__le32 tmp;
  
  	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  
  	adapter->seq_num++;
  	sleep_cfm_buf->seq_num =
  		cpu_to_le16((HostCmd_SET_SEQ_NO_BSS_INFO
  					(adapter->seq_num, priv->bss_num,
  					 priv->bss_type)));
  
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x
  ",
  		le16_to_cpu(sleep_cfm_buf->command),
  		le16_to_cpu(sleep_cfm_buf->action),
  		le16_to_cpu(sleep_cfm_buf->size),
  		le16_to_cpu(sleep_cfm_buf->seq_num));
  	mwifiex_dbg_dump(adapter, CMD_D, "SLEEP_CFM buffer: ", sleep_cfm_buf,
  			 le16_to_cpu(sleep_cfm_buf->size));
  
  	if (adapter->iface_type == MWIFIEX_USB) {
  		sleep_cfm_tmp =
  			dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
  				      + MWIFIEX_TYPE_LEN);
  		skb_put(sleep_cfm_tmp, sizeof(struct mwifiex_opt_sleep_confirm)
  			+ MWIFIEX_TYPE_LEN);
  		tmp = cpu_to_le32(MWIFIEX_USB_TYPE_CMD);
  		memcpy(sleep_cfm_tmp->data, &tmp, MWIFIEX_TYPE_LEN);
  		memcpy(sleep_cfm_tmp->data + MWIFIEX_TYPE_LEN,
  		       adapter->sleep_cfm->data,
  		       sizeof(struct mwifiex_opt_sleep_confirm));
  		ret = adapter->if_ops.host_to_card(adapter,
  						   MWIFIEX_USB_EP_CMD_EVENT,
  						   sleep_cfm_tmp, NULL);
  		if (ret != -EBUSY)
  			dev_kfree_skb_any(sleep_cfm_tmp);
  	} else {
  		skb_push(adapter->sleep_cfm, INTF_HEADER_LEN);
  		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_CMD,
  						   adapter->sleep_cfm, NULL);
  		skb_pull(adapter->sleep_cfm, INTF_HEADER_LEN);
  	}
  
  	if (ret == -1) {
  		mwifiex_dbg(adapter, ERROR, "SLEEP_CFM: failed
  ");
  		adapter->dbg.num_cmd_sleep_cfm_host_to_card_failure++;
  		return -1;
  	}
  
  	if (!le16_to_cpu(sleep_cfm_buf->resp_ctrl))
  		/* Response is not needed for sleep confirm command */
  		adapter->ps_state = PS_STATE_SLEEP;
  	else
  		adapter->ps_state = PS_STATE_SLEEP_CFM;
  
  	if (!le16_to_cpu(sleep_cfm_buf->resp_ctrl) &&
  	    (adapter->is_hs_configured &&
  	     !adapter->sleep_period.period)) {
  		adapter->pm_wakeup_card_req = true;
  		mwifiex_hs_activated_event(mwifiex_get_priv
  				(adapter, MWIFIEX_BSS_ROLE_ANY), true);
  	}
  
  	return ret;
  }
  
  /*
   * This function allocates the command buffers and links them to
   * the command free queue.
   *
   * The driver uses a pre allocated number of command buffers, which
   * are created at driver initializations and freed at driver cleanup.
   * Every command needs to obtain a command buffer from this pool before
   * it can be issued. The command free queue lists the command buffers
   * currently free to use, while the command pending queue lists the
   * command buffers already in use and awaiting handling. Command buffers
   * are returned to the free queue after use.
   */
  int mwifiex_alloc_cmd_buffer(struct mwifiex_adapter *adapter)
  {
  	struct cmd_ctrl_node *cmd_array;
  	u32 i;
  
  	/* Allocate and initialize struct cmd_ctrl_node */
  	cmd_array = kcalloc(MWIFIEX_NUM_OF_CMD_BUFFER,
  			    sizeof(struct cmd_ctrl_node), GFP_KERNEL);
  	if (!cmd_array)
  		return -ENOMEM;
  
  	adapter->cmd_pool = cmd_array;
  
  	/* Allocate and initialize command buffers */
  	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
  		cmd_array[i].skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER);
  		if (!cmd_array[i].skb) {
  			mwifiex_dbg(adapter, ERROR,
  				    "unable to allocate command buffer
  ");
  			return -ENOMEM;
  		}
  	}
  
  	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++)
  		mwifiex_insert_cmd_to_free_q(adapter, &cmd_array[i]);
  
  	return 0;
  }
  
  /*
   * This function frees the command buffers.
   *
   * The function calls the completion callback for all the command
   * buffers that still have response buffers associated with them.
   */
  int mwifiex_free_cmd_buffer(struct mwifiex_adapter *adapter)
  {
  	struct cmd_ctrl_node *cmd_array;
  	u32 i;
  
  	/* Need to check if cmd pool is allocated or not */
  	if (!adapter->cmd_pool) {
  		mwifiex_dbg(adapter, FATAL,
  			    "info: FREE_CMD_BUF: cmd_pool is null
  ");
  		return 0;
  	}
  
  	cmd_array = adapter->cmd_pool;
  
  	/* Release shared memory buffers */
  	for (i = 0; i < MWIFIEX_NUM_OF_CMD_BUFFER; i++) {
  		if (cmd_array[i].skb) {
  			mwifiex_dbg(adapter, CMD,
  				    "cmd: free cmd buffer %d
  ", i);
  			dev_kfree_skb_any(cmd_array[i].skb);
  		}
  		if (!cmd_array[i].resp_skb)
  			continue;
  
  		if (adapter->iface_type == MWIFIEX_USB)
  			adapter->if_ops.cmdrsp_complete(adapter,
  							cmd_array[i].resp_skb);
  		else
  			dev_kfree_skb_any(cmd_array[i].resp_skb);
  	}
  	/* Release struct cmd_ctrl_node */
  	if (adapter->cmd_pool) {
  		mwifiex_dbg(adapter, CMD,
  			    "cmd: free cmd pool
  ");
  		kfree(adapter->cmd_pool);
  		adapter->cmd_pool = NULL;
  	}
  
  	return 0;
  }
  
  /*
   * This function handles events generated by firmware.
   *
   * Event body of events received from firmware are not used (though they are
   * saved), only the event ID is used. Some events are re-invoked by
   * the driver, with a new event body.
   *
   * After processing, the function calls the completion callback
   * for cleanup.
   */
  int mwifiex_process_event(struct mwifiex_adapter *adapter)
  {
  	int ret;
  	struct mwifiex_private *priv =
  		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  	struct sk_buff *skb = adapter->event_skb;
  	u32 eventcause = adapter->event_cause;
  	struct mwifiex_rxinfo *rx_info;
  
  	/* Save the last event to debug log */
  	adapter->dbg.last_event_index =
  			(adapter->dbg.last_event_index + 1) % DBG_CMD_NUM;
  	adapter->dbg.last_event[adapter->dbg.last_event_index] =
  							(u16) eventcause;
  
  	/* Get BSS number and corresponding priv */
  	priv = mwifiex_get_priv_by_id(adapter, EVENT_GET_BSS_NUM(eventcause),
  				      EVENT_GET_BSS_TYPE(eventcause));
  	if (!priv)
  		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  
  	/* Clear BSS_NO_BITS from event */
  	eventcause &= EVENT_ID_MASK;
  	adapter->event_cause = eventcause;
  
  	if (skb) {
  		rx_info = MWIFIEX_SKB_RXCB(skb);
  		memset(rx_info, 0, sizeof(*rx_info));
  		rx_info->bss_num = priv->bss_num;
  		rx_info->bss_type = priv->bss_type;
  		mwifiex_dbg_dump(adapter, EVT_D, "Event Buf:",
  				 skb->data, skb->len);
  	}
  
  	mwifiex_dbg(adapter, EVENT, "EVENT: cause: %#x
  ", eventcause);
  
  	if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
  		ret = mwifiex_process_uap_event(priv);
  	else
  		ret = mwifiex_process_sta_event(priv);
  
  	adapter->event_cause = 0;
  	adapter->event_skb = NULL;
  	adapter->if_ops.event_complete(adapter, skb);
  
  	return ret;
  }
  
  /*
   * This function prepares a command and send it to the firmware.
   *
   * Preparation includes -
   *      - Sanity tests to make sure the card is still present or the FW
   *        is not reset
   *      - Getting a new command node from the command free queue
   *      - Initializing the command node for default parameters
   *      - Fill up the non-default parameters and buffer pointers
   *      - Add the command to pending queue
   */
  int mwifiex_send_cmd(struct mwifiex_private *priv, u16 cmd_no,
  		     u16 cmd_action, u32 cmd_oid, void *data_buf, bool sync)
  {
  	int ret;
  	struct mwifiex_adapter *adapter = priv->adapter;
  	struct cmd_ctrl_node *cmd_node;
  	struct host_cmd_ds_command *cmd_ptr;
  
  	if (!adapter) {
  		pr_err("PREP_CMD: adapter is NULL
  ");
  		return -1;
  	}
  
  	if (adapter->is_suspended) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: device in suspended state
  ");
  		return -1;
  	}
  
  	if (adapter->hs_enabling && cmd_no != HostCmd_CMD_802_11_HS_CFG_ENH) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: host entering sleep state
  ");
  		return -1;
  	}
  
  	if (adapter->surprise_removed) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: card is removed
  ");
  		return -1;
  	}
  
  	if (adapter->is_cmd_timedout) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: FW is in bad state
  ");
  		return -1;
  	}
  
  	if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET) {
  		if (cmd_no != HostCmd_CMD_FUNC_INIT) {
  			mwifiex_dbg(adapter, ERROR,
  				    "PREP_CMD: FW in reset state
  ");
  			return -1;
  		}
  	}
  
  	/* Get a new command node */
  	cmd_node = mwifiex_get_cmd_node(adapter);
  
  	if (!cmd_node) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: no free cmd node
  ");
  		return -1;
  	}
  
  	/* Initialize the command node */
  	mwifiex_init_cmd_node(priv, cmd_node, cmd_oid, data_buf, sync);
  
  	if (!cmd_node->cmd_skb) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: no free cmd buf
  ");
  		return -1;
  	}
  
  	memset(skb_put(cmd_node->cmd_skb, sizeof(struct host_cmd_ds_command)),
  	       0, sizeof(struct host_cmd_ds_command));
  
  	cmd_ptr = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
  	cmd_ptr->command = cpu_to_le16(cmd_no);
  	cmd_ptr->result = 0;
  
  	/* Prepare command */
  	if (cmd_no) {
  		switch (cmd_no) {
  		case HostCmd_CMD_UAP_SYS_CONFIG:
  		case HostCmd_CMD_UAP_BSS_START:
  		case HostCmd_CMD_UAP_BSS_STOP:
  		case HostCmd_CMD_UAP_STA_DEAUTH:
  		case HOST_CMD_APCMD_SYS_RESET:
  		case HOST_CMD_APCMD_STA_LIST:
  			ret = mwifiex_uap_prepare_cmd(priv, cmd_no, cmd_action,
  						      cmd_oid, data_buf,
  						      cmd_ptr);
  			break;
  		default:
  			ret = mwifiex_sta_prepare_cmd(priv, cmd_no, cmd_action,
  						      cmd_oid, data_buf,
  						      cmd_ptr);
  			break;
  		}
  	} else {
  		ret = mwifiex_cmd_host_cmd(priv, cmd_ptr, data_buf);
  		cmd_node->cmd_flag |= CMD_F_HOSTCMD;
  	}
  
  	/* Return error, since the command preparation failed */
  	if (ret) {
  		mwifiex_dbg(adapter, ERROR,
  			    "PREP_CMD: cmd %#x preparation failed
  ",
  			cmd_no);
  		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  		return -1;
  	}
  
  	/* Send command */
  	if (cmd_no == HostCmd_CMD_802_11_SCAN ||
  	    cmd_no == HostCmd_CMD_802_11_SCAN_EXT) {
  		mwifiex_queue_scan_cmd(priv, cmd_node);
  	} else {
  		mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
  		queue_work(adapter->workqueue, &adapter->main_work);
  		if (cmd_node->wait_q_enabled)
  			ret = mwifiex_wait_queue_complete(adapter, cmd_node);
  	}
  
  	return ret;
  }
  
  /*
   * This function returns a command to the command free queue.
   *
   * The function also calls the completion callback if required, before
   * cleaning the command node and re-inserting it into the free queue.
   */
  void
  mwifiex_insert_cmd_to_free_q(struct mwifiex_adapter *adapter,
  			     struct cmd_ctrl_node *cmd_node)
  {
  	unsigned long flags;
  
  	if (!cmd_node)
  		return;
  
  	if (cmd_node->wait_q_enabled)
  		mwifiex_complete_cmd(adapter, cmd_node);
  	/* Clean the node */
  	mwifiex_clean_cmd_node(adapter, cmd_node);
  
  	/* Insert node into cmd_free_q */
  	spin_lock_irqsave(&adapter->cmd_free_q_lock, flags);
  	list_add_tail(&cmd_node->list, &adapter->cmd_free_q);
  	spin_unlock_irqrestore(&adapter->cmd_free_q_lock, flags);
  }
  
  /* This function reuses a command node. */
  void mwifiex_recycle_cmd_node(struct mwifiex_adapter *adapter,
  			      struct cmd_ctrl_node *cmd_node)
  {
  	struct host_cmd_ds_command *host_cmd = (void *)cmd_node->cmd_skb->data;
  
  	mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  
  	atomic_dec(&adapter->cmd_pending);
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: FREE_CMD: cmd=%#x, cmd_pending=%d
  ",
  		le16_to_cpu(host_cmd->command),
  		atomic_read(&adapter->cmd_pending));
  }
  
  /*
   * This function queues a command to the command pending queue.
   *
   * This in effect adds the command to the command list to be executed.
   * Exit PS command is handled specially, by placing it always to the
   * front of the command queue.
   */
  void
  mwifiex_insert_cmd_to_pending_q(struct mwifiex_adapter *adapter,
  				struct cmd_ctrl_node *cmd_node, u32 add_tail)
  {
  	struct host_cmd_ds_command *host_cmd = NULL;
  	u16 command;
  	unsigned long flags;
  
  	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
  	if (!host_cmd) {
  		mwifiex_dbg(adapter, ERROR, "QUEUE_CMD: host_cmd is NULL
  ");
  		return;
  	}
  
  	command = le16_to_cpu(host_cmd->command);
  
  	/* Exit_PS command needs to be queued in the header always. */
  	if (command == HostCmd_CMD_802_11_PS_MODE_ENH) {
  		struct host_cmd_ds_802_11_ps_mode_enh *pm =
  						&host_cmd->params.psmode_enh;
  		if ((le16_to_cpu(pm->action) == DIS_PS) ||
  		    (le16_to_cpu(pm->action) == DIS_AUTO_PS)) {
  			if (adapter->ps_state != PS_STATE_AWAKE)
  				add_tail = false;
  		}
  	}
  
  	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
  	if (add_tail)
  		list_add_tail(&cmd_node->list, &adapter->cmd_pending_q);
  	else
  		list_add(&cmd_node->list, &adapter->cmd_pending_q);
  	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
  
  	atomic_inc(&adapter->cmd_pending);
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: QUEUE_CMD: cmd=%#x, cmd_pending=%d
  ",
  		command, atomic_read(&adapter->cmd_pending));
  }
  
  /*
   * This function executes the next command in command pending queue.
   *
   * This function will fail if a command is already in processing stage,
   * otherwise it will dequeue the first command from the command pending
   * queue and send to the firmware.
   *
   * If the device is currently in host sleep mode, any commands, except the
   * host sleep configuration command will de-activate the host sleep. For PS
   * mode, the function will put the firmware back to sleep if applicable.
   */
  int mwifiex_exec_next_cmd(struct mwifiex_adapter *adapter)
  {
  	struct mwifiex_private *priv;
  	struct cmd_ctrl_node *cmd_node;
  	int ret = 0;
  	struct host_cmd_ds_command *host_cmd;
  	unsigned long cmd_flags;
  	unsigned long cmd_pending_q_flags;
  
  	/* Check if already in processing */
  	if (adapter->curr_cmd) {
  		mwifiex_dbg(adapter, FATAL,
  			    "EXEC_NEXT_CMD: cmd in processing
  ");
  		return -1;
  	}
  
  	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
  	/* Check if any command is pending */
  	spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
  	if (list_empty(&adapter->cmd_pending_q)) {
  		spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
  				       cmd_pending_q_flags);
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  		return 0;
  	}
  	cmd_node = list_first_entry(&adapter->cmd_pending_q,
  				    struct cmd_ctrl_node, list);
  	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
  			       cmd_pending_q_flags);
  
  	host_cmd = (struct host_cmd_ds_command *) (cmd_node->cmd_skb->data);
  	priv = cmd_node->priv;
  
  	if (adapter->ps_state != PS_STATE_AWAKE) {
  		mwifiex_dbg(adapter, ERROR,
  			    "%s: cannot send cmd in sleep state,\t"
  			    "this should not happen
  ", __func__);
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  		return ret;
  	}
  
  	spin_lock_irqsave(&adapter->cmd_pending_q_lock, cmd_pending_q_flags);
  	list_del(&cmd_node->list);
  	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock,
  			       cmd_pending_q_flags);
  
  	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  	ret = mwifiex_dnld_cmd_to_fw(priv, cmd_node);
  	priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  	/* Any command sent to the firmware when host is in sleep
  	 * mode should de-configure host sleep. We should skip the
  	 * host sleep configuration command itself though
  	 */
  	if (priv && (host_cmd->command !=
  	     cpu_to_le16(HostCmd_CMD_802_11_HS_CFG_ENH))) {
  		if (adapter->hs_activated) {
  			adapter->is_hs_configured = false;
  			mwifiex_hs_activated_event(priv, false);
  		}
  	}
  
  	return ret;
  }
  
  /*
   * This function handles the command response.
   *
   * After processing, the function cleans the command node and puts
   * it back to the command free queue.
   */
  int mwifiex_process_cmdresp(struct mwifiex_adapter *adapter)
  {
  	struct host_cmd_ds_command *resp;
  	struct mwifiex_private *priv =
  		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  	int ret = 0;
  	uint16_t orig_cmdresp_no;
  	uint16_t cmdresp_no;
  	uint16_t cmdresp_result;
  	unsigned long flags;
  
  	/* Now we got response from FW, cancel the command timer */
  	del_timer_sync(&adapter->cmd_timer);
  
  	if (!adapter->curr_cmd || !adapter->curr_cmd->resp_skb) {
  		resp = (struct host_cmd_ds_command *) adapter->upld_buf;
  		mwifiex_dbg(adapter, ERROR,
  			    "CMD_RESP: NULL curr_cmd, %#x
  ",
  			    le16_to_cpu(resp->command));
  		return -1;
  	}
  
  	adapter->is_cmd_timedout = 0;
  
  	resp = (struct host_cmd_ds_command *) adapter->curr_cmd->resp_skb->data;
  	if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
  		/* Copy original response back to response buffer */
  		struct mwifiex_ds_misc_cmd *hostcmd;
  		uint16_t size = le16_to_cpu(resp->size);
  		mwifiex_dbg(adapter, INFO,
  			    "info: host cmd resp size = %d
  ", size);
  		size = min_t(u16, size, MWIFIEX_SIZE_OF_CMD_BUFFER);
  		if (adapter->curr_cmd->data_buf) {
  			hostcmd = adapter->curr_cmd->data_buf;
  			hostcmd->len = size;
  			memcpy(hostcmd->cmd, resp, size);
  		}
  	}
  	orig_cmdresp_no = le16_to_cpu(resp->command);
  
  	/* Get BSS number and corresponding priv */
  	priv = mwifiex_get_priv_by_id(adapter,
  			     HostCmd_GET_BSS_NO(le16_to_cpu(resp->seq_num)),
  			     HostCmd_GET_BSS_TYPE(le16_to_cpu(resp->seq_num)));
  	if (!priv)
  		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  	/* Clear RET_BIT from HostCmd */
  	resp->command = cpu_to_le16(orig_cmdresp_no & HostCmd_CMD_ID_MASK);
  
  	cmdresp_no = le16_to_cpu(resp->command);
  	cmdresp_result = le16_to_cpu(resp->result);
  
  	/* Save the last command response to debug log */
  	adapter->dbg.last_cmd_resp_index =
  			(adapter->dbg.last_cmd_resp_index + 1) % DBG_CMD_NUM;
  	adapter->dbg.last_cmd_resp_id[adapter->dbg.last_cmd_resp_index] =
  								orig_cmdresp_no;
  
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x
  ",
  		    orig_cmdresp_no, cmdresp_result,
  		    le16_to_cpu(resp->size), le16_to_cpu(resp->seq_num));
  	mwifiex_dbg_dump(adapter, CMD_D, "CMD_RESP buffer:", resp,
  			 le16_to_cpu(resp->size));
  
  	if (!(orig_cmdresp_no & HostCmd_RET_BIT)) {
  		mwifiex_dbg(adapter, ERROR, "CMD_RESP: invalid cmd resp
  ");
  		if (adapter->curr_cmd->wait_q_enabled)
  			adapter->cmd_wait_q.status = -1;
  
  		mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  		adapter->curr_cmd = NULL;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  		return -1;
  	}
  
  	if (adapter->curr_cmd->cmd_flag & CMD_F_HOSTCMD) {
  		adapter->curr_cmd->cmd_flag &= ~CMD_F_HOSTCMD;
  		if ((cmdresp_result == HostCmd_RESULT_OK) &&
  		    (cmdresp_no == HostCmd_CMD_802_11_HS_CFG_ENH))
  			ret = mwifiex_ret_802_11_hs_cfg(priv, resp);
  	} else {
  		/* handle response */
  		ret = mwifiex_process_sta_cmdresp(priv, cmdresp_no, resp);
  	}
  
  	/* Check init command response */
  	if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
  		if (ret) {
  			mwifiex_dbg(adapter, ERROR,
  				    "%s: cmd %#x failed during\t"
  				    "initialization
  ", __func__, cmdresp_no);
  			mwifiex_init_fw_complete(adapter);
  			return -1;
  		} else if (adapter->last_init_cmd == cmdresp_no)
  			adapter->hw_status = MWIFIEX_HW_STATUS_INIT_DONE;
  	}
  
  	if (adapter->curr_cmd) {
  		if (adapter->curr_cmd->wait_q_enabled)
  			adapter->cmd_wait_q.status = ret;
  
  		mwifiex_recycle_cmd_node(adapter, adapter->curr_cmd);
  
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
  		adapter->curr_cmd = NULL;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
  	}
  
  	return ret;
  }
  
  /*
   * This function handles the timeout of command sending.
   *
   * It will re-send the same command again.
   */
  void
  mwifiex_cmd_timeout_func(unsigned long function_context)
  {
  	struct mwifiex_adapter *adapter =
  		(struct mwifiex_adapter *) function_context;
  	struct cmd_ctrl_node *cmd_node;
  
  	adapter->is_cmd_timedout = 1;
  	if (!adapter->curr_cmd) {
  		mwifiex_dbg(adapter, ERROR,
  			    "cmd: empty curr_cmd
  ");
  		return;
  	}
  	cmd_node = adapter->curr_cmd;
  	if (cmd_node) {
  		adapter->dbg.timeout_cmd_id =
  			adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index];
  		adapter->dbg.timeout_cmd_act =
  			adapter->dbg.last_cmd_act[adapter->dbg.last_cmd_index];
  		mwifiex_dbg(adapter, MSG,
  			    "%s: Timeout cmd id = %#x, act = %#x
  ", __func__,
  			    adapter->dbg.timeout_cmd_id,
  			    adapter->dbg.timeout_cmd_act);
  
  		mwifiex_dbg(adapter, MSG,
  			    "num_data_h2c_failure = %d
  ",
  			    adapter->dbg.num_tx_host_to_card_failure);
  		mwifiex_dbg(adapter, MSG,
  			    "num_cmd_h2c_failure = %d
  ",
  			    adapter->dbg.num_cmd_host_to_card_failure);
  
  		mwifiex_dbg(adapter, MSG,
  			    "is_cmd_timedout = %d
  ",
  			    adapter->is_cmd_timedout);
  		mwifiex_dbg(adapter, MSG,
  			    "num_tx_timeout = %d
  ",
  			    adapter->dbg.num_tx_timeout);
  
  		mwifiex_dbg(adapter, MSG,
  			    "last_cmd_index = %d
  ",
  			    adapter->dbg.last_cmd_index);
  		mwifiex_dbg(adapter, MSG,
  			    "last_cmd_id: %*ph
  ",
  			    (int)sizeof(adapter->dbg.last_cmd_id),
  			    adapter->dbg.last_cmd_id);
  		mwifiex_dbg(adapter, MSG,
  			    "last_cmd_act: %*ph
  ",
  			    (int)sizeof(adapter->dbg.last_cmd_act),
  			    adapter->dbg.last_cmd_act);
  
  		mwifiex_dbg(adapter, MSG,
  			    "last_cmd_resp_index = %d
  ",
  			    adapter->dbg.last_cmd_resp_index);
  		mwifiex_dbg(adapter, MSG,
  			    "last_cmd_resp_id: %*ph
  ",
  			    (int)sizeof(adapter->dbg.last_cmd_resp_id),
  			    adapter->dbg.last_cmd_resp_id);
  
  		mwifiex_dbg(adapter, MSG,
  			    "last_event_index = %d
  ",
  			    adapter->dbg.last_event_index);
  		mwifiex_dbg(adapter, MSG,
  			    "last_event: %*ph
  ",
  			    (int)sizeof(adapter->dbg.last_event),
  			    adapter->dbg.last_event);
  
  		mwifiex_dbg(adapter, MSG,
  			    "data_sent=%d cmd_sent=%d
  ",
  			    adapter->data_sent, adapter->cmd_sent);
  
  		mwifiex_dbg(adapter, MSG,
  			    "ps_mode=%d ps_state=%d
  ",
  			    adapter->ps_mode, adapter->ps_state);
  
  		if (cmd_node->wait_q_enabled) {
  			adapter->cmd_wait_q.status = -ETIMEDOUT;
  			mwifiex_cancel_pending_ioctl(adapter);
  		}
  	}
  	if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING) {
  		mwifiex_init_fw_complete(adapter);
  		return;
  	}
  
  	if (adapter->if_ops.device_dump)
  		adapter->if_ops.device_dump(adapter);
  
  	if (adapter->if_ops.card_reset)
  		adapter->if_ops.card_reset(adapter);
  }
  
  /*
   * This function cancels all the pending commands.
   *
   * The current command, all commands in command pending queue and all scan
   * commands in scan pending queue are cancelled. All the completion callbacks
   * are called with failure status to ensure cleanup.
   */
  void
  mwifiex_cancel_all_pending_cmd(struct mwifiex_adapter *adapter)
  {
  	struct cmd_ctrl_node *cmd_node = NULL, *tmp_node;
  	unsigned long flags, cmd_flags;
  	struct mwifiex_private *priv;
  	int i;
  
  	spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
  	/* Cancel current cmd */
  	if ((adapter->curr_cmd) && (adapter->curr_cmd->wait_q_enabled)) {
  		adapter->curr_cmd->wait_q_enabled = false;
  		adapter->cmd_wait_q.status = -1;
  		mwifiex_complete_cmd(adapter, adapter->curr_cmd);
  		/* no recycle probably wait for response */
  	}
  	/* Cancel all pending command */
  	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
  	list_for_each_entry_safe(cmd_node, tmp_node,
  				 &adapter->cmd_pending_q, list) {
  		list_del(&cmd_node->list);
  		spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
  
  		if (cmd_node->wait_q_enabled)
  			adapter->cmd_wait_q.status = -1;
  		mwifiex_recycle_cmd_node(adapter, cmd_node);
  		spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
  	}
  	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
  	spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  
  	/* 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);
  
  		cmd_node->wait_q_enabled = false;
  		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  	}
  	spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
  
  	if (adapter->scan_processing) {
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
  		adapter->scan_processing = false;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  		for (i = 0; i < adapter->priv_num; i++) {
  			priv = adapter->priv[i];
  			if (!priv)
  				continue;
  			if (priv->scan_request) {
  				mwifiex_dbg(adapter, WARN, "info: aborting scan
  ");
  				cfg80211_scan_done(priv->scan_request, 1);
  				priv->scan_request = NULL;
  			}
  		}
  	}
  }
  
  /*
   * This function cancels all pending commands that matches with
   * the given IOCTL request.
   *
   * Both the current command buffer and the pending command queue are
   * searched for matching IOCTL request. The completion callback of
   * the matched command is called with failure status to ensure cleanup.
   * In case of scan commands, all pending commands in scan pending queue
   * are cancelled.
   */
  void
  mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter)
  {
  	struct cmd_ctrl_node *cmd_node = NULL, *tmp_node = NULL;
  	unsigned long cmd_flags;
  	unsigned long scan_pending_q_flags;
  	struct mwifiex_private *priv;
  	int i;
  
  	if ((adapter->curr_cmd) &&
  	    (adapter->curr_cmd->wait_q_enabled)) {
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
  		cmd_node = adapter->curr_cmd;
  		/* setting curr_cmd to NULL is quite dangerous, because
  		 * mwifiex_process_cmdresp checks curr_cmd to be != NULL
  		 * at the beginning then relies on it and dereferences
  		 * it at will
  		 * this probably works since mwifiex_cmd_timeout_func
  		 * is the only caller of this function and responses
  		 * at that point
  		 */
  		adapter->curr_cmd = NULL;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  
  		mwifiex_recycle_cmd_node(adapter, cmd_node);
  	}
  
  	/* Cancel all pending scan command */
  	spin_lock_irqsave(&adapter->scan_pending_q_lock,
  			  scan_pending_q_flags);
  	list_for_each_entry_safe(cmd_node, tmp_node,
  				 &adapter->scan_pending_q, list) {
  		list_del(&cmd_node->list);
  		cmd_node->wait_q_enabled = false;
  		mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
  	}
  	spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
  			       scan_pending_q_flags);
  
  	if (adapter->scan_processing) {
  		spin_lock_irqsave(&adapter->mwifiex_cmd_lock, cmd_flags);
  		adapter->scan_processing = false;
  		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
  		for (i = 0; i < adapter->priv_num; i++) {
  			priv = adapter->priv[i];
  			if (!priv)
  				continue;
  			if (priv->scan_request) {
  				mwifiex_dbg(adapter, WARN, "info: aborting scan
  ");
  				cfg80211_scan_done(priv->scan_request, 1);
  				priv->scan_request = NULL;
  			}
  		}
  	}
  }
  
  /*
   * This function sends the sleep confirm command to firmware, if
   * possible.
   *
   * The sleep confirm command cannot be issued if command response,
   * data response or event response is awaiting handling, or if we
   * are in the middle of sending a command, or expecting a command
   * response.
   */
  void
  mwifiex_check_ps_cond(struct mwifiex_adapter *adapter)
  {
  	if (!adapter->cmd_sent &&
  	    !adapter->curr_cmd && !IS_CARD_RX_RCVD(adapter))
  		mwifiex_dnld_sleep_confirm_cmd(adapter);
  	else
  		mwifiex_dbg(adapter, CMD,
  			    "cmd: Delay Sleep Confirm (%s%s%s)
  ",
  			    (adapter->cmd_sent) ? "D" : "",
  			    (adapter->curr_cmd) ? "C" : "",
  			    (IS_CARD_RX_RCVD(adapter)) ? "R" : "");
  }
  
  /*
   * This function sends a Host Sleep activated event to applications.
   *
   * This event is generated by the driver, with a blank event body.
   */
  void
  mwifiex_hs_activated_event(struct mwifiex_private *priv, u8 activated)
  {
  	if (activated) {
  		if (priv->adapter->is_hs_configured) {
  			priv->adapter->hs_activated = true;
  			mwifiex_update_rxreor_flags(priv->adapter,
  						    RXREOR_FORCE_NO_DROP);
  			mwifiex_dbg(priv->adapter, EVENT,
  				    "event: hs_activated
  ");
  			priv->adapter->hs_activate_wait_q_woken = true;
  			wake_up_interruptible(
  				&priv->adapter->hs_activate_wait_q);
  		} else {
  			mwifiex_dbg(priv->adapter, EVENT,
  				    "event: HS not configured
  ");
  		}
  	} else {
  		mwifiex_dbg(priv->adapter, EVENT,
  			    "event: hs_deactivated
  ");
  		priv->adapter->hs_activated = false;
  	}
  }
  
  /*
   * This function handles the command response of a Host Sleep configuration
   * command.
   *
   * Handling includes changing the header fields into CPU format
   * and setting the current host sleep activation status in driver.
   *
   * In case host sleep status change, the function generates an event to
   * notify the applications.
   */
  int mwifiex_ret_802_11_hs_cfg(struct mwifiex_private *priv,
  			      struct host_cmd_ds_command *resp)
  {
  	struct mwifiex_adapter *adapter = priv->adapter;
  	struct host_cmd_ds_802_11_hs_cfg_enh *phs_cfg =
  		&resp->params.opt_hs_cfg;
  	uint32_t conditions = le32_to_cpu(phs_cfg->params.hs_config.conditions);
  
  	if (phs_cfg->action == cpu_to_le16(HS_ACTIVATE) &&
  	    adapter->iface_type != MWIFIEX_USB) {
  		mwifiex_hs_activated_event(priv, true);
  		return 0;
  	} else {
  		mwifiex_dbg(adapter, CMD,
  			    "cmd: CMD_RESP: HS_CFG cmd reply\t"
  			    " result=%#x, conditions=0x%x gpio=0x%x gap=0x%x
  ",
  			    resp->result, conditions,
  			    phs_cfg->params.hs_config.gpio,
  			    phs_cfg->params.hs_config.gap);
  	}
  	if (conditions != HS_CFG_CANCEL) {
  		adapter->is_hs_configured = true;
  		if (adapter->iface_type == MWIFIEX_USB)
  			mwifiex_hs_activated_event(priv, true);
  	} else {
  		adapter->is_hs_configured = false;
  		if (adapter->hs_activated)
  			mwifiex_hs_activated_event(priv, false);
  	}
  
  	return 0;
  }
  
  /*
   * This function wakes up the adapter and generates a Host Sleep
   * cancel event on receiving the power up interrupt.
   */
  void
  mwifiex_process_hs_config(struct mwifiex_adapter *adapter)
  {
  	mwifiex_dbg(adapter, INFO,
  		    "info: %s: auto cancelling host sleep\t"
  		    "since there is interrupt from the firmware
  ",
  		    __func__);
  
  	adapter->if_ops.wakeup(adapter);
  	adapter->hs_activated = false;
  	adapter->is_hs_configured = false;
  	adapter->is_suspended = false;
  	mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
  						    MWIFIEX_BSS_ROLE_ANY),
  				   false);
  }
  EXPORT_SYMBOL_GPL(mwifiex_process_hs_config);
  
  /*
   * This function handles the command response of a sleep confirm command.
   *
   * The function sets the card state to SLEEP if the response indicates success.
   */
  void
  mwifiex_process_sleep_confirm_resp(struct mwifiex_adapter *adapter,
  				   u8 *pbuf, u32 upld_len)
  {
  	struct host_cmd_ds_command *cmd = (struct host_cmd_ds_command *) pbuf;
  	struct mwifiex_private *priv =
  		mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  	uint16_t result = le16_to_cpu(cmd->result);
  	uint16_t command = le16_to_cpu(cmd->command);
  	uint16_t seq_num = le16_to_cpu(cmd->seq_num);
  
  	if (!upld_len) {
  		mwifiex_dbg(adapter, ERROR,
  			    "%s: cmd size is 0
  ", __func__);
  		return;
  	}
  
  	mwifiex_dbg(adapter, CMD,
  		    "cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x
  ",
  		    command, result, le16_to_cpu(cmd->size), seq_num);
  
  	/* Get BSS number and corresponding priv */
  	priv = mwifiex_get_priv_by_id(adapter, HostCmd_GET_BSS_NO(seq_num),
  				      HostCmd_GET_BSS_TYPE(seq_num));
  	if (!priv)
  		priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
  
  	/* Update sequence number */
  	seq_num = HostCmd_GET_SEQ_NO(seq_num);
  	/* Clear RET_BIT from HostCmd */
  	command &= HostCmd_CMD_ID_MASK;
  
  	if (command != HostCmd_CMD_802_11_PS_MODE_ENH) {
  		mwifiex_dbg(adapter, ERROR,
  			    "%s: rcvd unexpected resp for cmd %#x, result = %x
  ",
  			    __func__, command, result);
  		return;
  	}
  
  	if (result) {
  		mwifiex_dbg(adapter, ERROR,
  			    "%s: sleep confirm cmd failed
  ",
  			    __func__);
  		adapter->pm_wakeup_card_req = false;
  		adapter->ps_state = PS_STATE_AWAKE;
  		return;
  	}
  	adapter->pm_wakeup_card_req = true;
  	if (adapter->is_hs_configured)
  		mwifiex_hs_activated_event(mwifiex_get_priv
  						(adapter, MWIFIEX_BSS_ROLE_ANY),
  					   true);
  	adapter->ps_state = PS_STATE_SLEEP;
  	cmd->command = cpu_to_le16(command);
  	cmd->seq_num = cpu_to_le16(seq_num);
  }
  EXPORT_SYMBOL_GPL(mwifiex_process_sleep_confirm_resp);
  
  /*
   * This function prepares an enhanced power mode command.
   *
   * This function can be used to disable power save or to configure
   * power save with auto PS or STA PS or auto deep sleep.
   *
   * Preparation includes -
   *      - Setting command ID, action and proper size
   *      - Setting Power Save bitmap, PS parameters TLV, PS mode TLV,
   *        auto deep sleep TLV (as required)
   *      - Ensuring correct endian-ness
   */
  int mwifiex_cmd_enh_power_mode(struct mwifiex_private *priv,
  			       struct host_cmd_ds_command *cmd,
  			       u16 cmd_action, uint16_t ps_bitmap,
  			       struct mwifiex_ds_auto_ds *auto_ds)
  {
  	struct host_cmd_ds_802_11_ps_mode_enh *psmode_enh =
  		&cmd->params.psmode_enh;
  	u8 *tlv;
  	u16 cmd_size = 0;
  
  	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
  	if (cmd_action == DIS_AUTO_PS) {
  		psmode_enh->action = cpu_to_le16(DIS_AUTO_PS);
  		psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
  		cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
  					sizeof(psmode_enh->params.ps_bitmap));
  	} else if (cmd_action == GET_PS) {
  		psmode_enh->action = cpu_to_le16(GET_PS);
  		psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
  		cmd->size = cpu_to_le16(S_DS_GEN + sizeof(psmode_enh->action) +
  					sizeof(psmode_enh->params.ps_bitmap));
  	} else if (cmd_action == EN_AUTO_PS) {
  		psmode_enh->action = cpu_to_le16(EN_AUTO_PS);
  		psmode_enh->params.ps_bitmap = cpu_to_le16(ps_bitmap);
  		cmd_size = S_DS_GEN + sizeof(psmode_enh->action) +
  					sizeof(psmode_enh->params.ps_bitmap);
  		tlv = (u8 *) cmd + cmd_size;
  		if (ps_bitmap & BITMAP_STA_PS) {
  			struct mwifiex_adapter *adapter = priv->adapter;
  			struct mwifiex_ie_types_ps_param *ps_tlv =
  				(struct mwifiex_ie_types_ps_param *) tlv;
  			struct mwifiex_ps_param *ps_mode = &ps_tlv->param;
  			ps_tlv->header.type = cpu_to_le16(TLV_TYPE_PS_PARAM);
  			ps_tlv->header.len = cpu_to_le16(sizeof(*ps_tlv) -
  					sizeof(struct mwifiex_ie_types_header));
  			cmd_size += sizeof(*ps_tlv);
  			tlv += sizeof(*ps_tlv);
  			mwifiex_dbg(priv->adapter, CMD,
  				    "cmd: PS Command: Enter PS
  ");
  			ps_mode->null_pkt_interval =
  					cpu_to_le16(adapter->null_pkt_interval);
  			ps_mode->multiple_dtims =
  					cpu_to_le16(adapter->multiple_dtim);
  			ps_mode->bcn_miss_timeout =
  					cpu_to_le16(adapter->bcn_miss_time_out);
  			ps_mode->local_listen_interval =
  				cpu_to_le16(adapter->local_listen_interval);
  			ps_mode->adhoc_wake_period =
  				cpu_to_le16(adapter->adhoc_awake_period);
  			ps_mode->delay_to_ps =
  					cpu_to_le16(adapter->delay_to_ps);
  			ps_mode->mode = cpu_to_le16(adapter->enhanced_ps_mode);
  
  		}
  		if (ps_bitmap & BITMAP_AUTO_DS) {
  			struct mwifiex_ie_types_auto_ds_param *auto_ds_tlv =
  				(struct mwifiex_ie_types_auto_ds_param *) tlv;
  			u16 idletime = 0;
  
  			auto_ds_tlv->header.type =
  				cpu_to_le16(TLV_TYPE_AUTO_DS_PARAM);
  			auto_ds_tlv->header.len =
  				cpu_to_le16(sizeof(*auto_ds_tlv) -
  					sizeof(struct mwifiex_ie_types_header));
  			cmd_size += sizeof(*auto_ds_tlv);
  			tlv += sizeof(*auto_ds_tlv);
  			if (auto_ds)
  				idletime = auto_ds->idle_time;
  			mwifiex_dbg(priv->adapter, CMD,
  				    "cmd: PS Command: Enter Auto Deep Sleep
  ");
  			auto_ds_tlv->deep_sleep_timeout = cpu_to_le16(idletime);
  		}
  		cmd->size = cpu_to_le16(cmd_size);
  	}
  	return 0;
  }
  
  /*
   * This function handles the command response of an enhanced power mode
   * command.
   *
   * Handling includes changing the header fields into CPU format
   * and setting the current enhanced power mode in driver.
   */
  int mwifiex_ret_enh_power_mode(struct mwifiex_private *priv,
  			       struct host_cmd_ds_command *resp,
  			       struct mwifiex_ds_pm_cfg *pm_cfg)
  {
  	struct mwifiex_adapter *adapter = priv->adapter;
  	struct host_cmd_ds_802_11_ps_mode_enh *ps_mode =
  		&resp->params.psmode_enh;
  	uint16_t action = le16_to_cpu(ps_mode->action);
  	uint16_t ps_bitmap = le16_to_cpu(ps_mode->params.ps_bitmap);
  	uint16_t auto_ps_bitmap =
  		le16_to_cpu(ps_mode->params.ps_bitmap);
  
  	mwifiex_dbg(adapter, INFO,
  		    "info: %s: PS_MODE cmd reply result=%#x action=%#X
  ",
  		    __func__, resp->result, action);
  	if (action == EN_AUTO_PS) {
  		if (auto_ps_bitmap & BITMAP_AUTO_DS) {
  			mwifiex_dbg(adapter, CMD,
  				    "cmd: Enabled auto deep sleep
  ");
  			priv->adapter->is_deep_sleep = true;
  		}
  		if (auto_ps_bitmap & BITMAP_STA_PS) {
  			mwifiex_dbg(adapter, CMD,
  				    "cmd: Enabled STA power save
  ");
  			if (adapter->sleep_period.period)
  				mwifiex_dbg(adapter, CMD,
  					    "cmd: set to uapsd/pps mode
  ");
  		}
  	} else if (action == DIS_AUTO_PS) {
  		if (ps_bitmap & BITMAP_AUTO_DS) {
  			priv->adapter->is_deep_sleep = false;
  			mwifiex_dbg(adapter, CMD,
  				    "cmd: Disabled auto deep sleep
  ");
  		}
  		if (ps_bitmap & BITMAP_STA_PS) {
  			mwifiex_dbg(adapter, CMD,
  				    "cmd: Disabled STA power save
  ");
  			if (adapter->sleep_period.period) {
  				adapter->delay_null_pkt = false;
  				adapter->tx_lock_flag = false;
  				adapter->pps_uapsd_mode = false;
  			}
  		}
  	} else if (action == GET_PS) {
  		if (ps_bitmap & BITMAP_STA_PS)
  			adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_PSP;
  		else
  			adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
  
  		mwifiex_dbg(adapter, CMD,
  			    "cmd: ps_bitmap=%#x
  ", ps_bitmap);
  
  		if (pm_cfg) {
  			/* This section is for get power save mode */
  			if (ps_bitmap & BITMAP_STA_PS)
  				pm_cfg->param.ps_mode = 1;
  			else
  				pm_cfg->param.ps_mode = 0;
  		}
  	}
  	return 0;
  }
  
  /*
   * This function prepares command to get hardware specifications.
   *
   * Preparation includes -
   *      - Setting command ID, action and proper size
   *      - Setting permanent address parameter
   *      - Ensuring correct endian-ness
   */
  int mwifiex_cmd_get_hw_spec(struct mwifiex_private *priv,
  			    struct host_cmd_ds_command *cmd)
  {
  	struct host_cmd_ds_get_hw_spec *hw_spec = &cmd->params.hw_spec;
  
  	cmd->command = cpu_to_le16(HostCmd_CMD_GET_HW_SPEC);
  	cmd->size =
  		cpu_to_le16(sizeof(struct host_cmd_ds_get_hw_spec) + S_DS_GEN);
  	memcpy(hw_spec->permanent_addr, priv->curr_addr, ETH_ALEN);
  
  	return 0;
  }
  
  /*
   * This function handles the command response of get hardware
   * specifications.
   *
   * Handling includes changing the header fields into CPU format
   * and saving/updating the following parameters in driver -
   *      - Firmware capability information
   *      - Firmware band settings
   *      - Ad-hoc start band and channel
   *      - Ad-hoc 11n activation status
   *      - Firmware release number
   *      - Number of antennas
   *      - Hardware address
   *      - Hardware interface version
   *      - Firmware version
   *      - Region code
   *      - 11n capabilities
   *      - MCS support fields
   *      - MP end port
   */
  int mwifiex_ret_get_hw_spec(struct mwifiex_private *priv,
  			    struct host_cmd_ds_command *resp)
  {
  	struct host_cmd_ds_get_hw_spec *hw_spec = &resp->params.hw_spec;
  	struct mwifiex_adapter *adapter = priv->adapter;
  	struct mwifiex_ie_types_header *tlv;
  	struct hw_spec_api_rev *api_rev;
  	u16 resp_size, api_id;
  	int i, left_len, parsed_len = 0;
  
  	adapter->fw_cap_info = le32_to_cpu(hw_spec->fw_cap_info);
  
  	if (IS_SUPPORT_MULTI_BANDS(adapter))
  		adapter->fw_bands = (u8) GET_FW_DEFAULT_BANDS(adapter);
  	else
  		adapter->fw_bands = BAND_B;
  
  	adapter->config_bands = adapter->fw_bands;
  
  	if (adapter->fw_bands & BAND_A) {
  		if (adapter->fw_bands & BAND_GN) {
  			adapter->config_bands |= BAND_AN;
  			adapter->fw_bands |= BAND_AN;
  		}
  		if (adapter->fw_bands & BAND_AN) {
  			adapter->adhoc_start_band = BAND_A | BAND_AN;
  			adapter->adhoc_11n_enabled = true;
  		} else {
  			adapter->adhoc_start_band = BAND_A;
  		}
  		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL_A;
  	} else if (adapter->fw_bands & BAND_GN) {
  		adapter->adhoc_start_band = BAND_G | BAND_B | BAND_GN;
  		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
  		adapter->adhoc_11n_enabled = true;
  	} else if (adapter->fw_bands & BAND_G) {
  		adapter->adhoc_start_band = BAND_G | BAND_B;
  		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
  	} else if (adapter->fw_bands & BAND_B) {
  		adapter->adhoc_start_band = BAND_B;
  		priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
  	}
  
  	adapter->fw_release_number = le32_to_cpu(hw_spec->fw_release_number);
  	adapter->fw_api_ver = (adapter->fw_release_number >> 16) & 0xff;
  	adapter->number_of_antenna = le16_to_cpu(hw_spec->number_of_antenna);
  
  	if (le32_to_cpu(hw_spec->dot_11ac_dev_cap)) {
  		adapter->is_hw_11ac_capable = true;
  
  		/* Copy 11AC cap */
  		adapter->hw_dot_11ac_dev_cap =
  					le32_to_cpu(hw_spec->dot_11ac_dev_cap);
  		adapter->usr_dot_11ac_dev_cap_bg = adapter->hw_dot_11ac_dev_cap
  					& ~MWIFIEX_DEF_11AC_CAP_BF_RESET_MASK;
  		adapter->usr_dot_11ac_dev_cap_a = adapter->hw_dot_11ac_dev_cap
  					& ~MWIFIEX_DEF_11AC_CAP_BF_RESET_MASK;
  
  		/* Copy 11AC mcs */
  		adapter->hw_dot_11ac_mcs_support =
  				le32_to_cpu(hw_spec->dot_11ac_mcs_support);
  		adapter->usr_dot_11ac_mcs_support =
  					adapter->hw_dot_11ac_mcs_support;
  	} else {
  		adapter->is_hw_11ac_capable = false;
  	}
  
  	resp_size = le16_to_cpu(resp->size) - S_DS_GEN;
  	if (resp_size > sizeof(struct host_cmd_ds_get_hw_spec)) {
  		/* we have variable HW SPEC information */
  		left_len = resp_size - sizeof(struct host_cmd_ds_get_hw_spec);
  		while (left_len > sizeof(struct mwifiex_ie_types_header)) {
  			tlv = (void *)&hw_spec->tlvs + parsed_len;
  			switch (le16_to_cpu(tlv->type)) {
  			case TLV_TYPE_API_REV:
  				api_rev = (struct hw_spec_api_rev *)tlv;
  				api_id = le16_to_cpu(api_rev->api_id);
  				switch (api_id) {
  				case KEY_API_VER_ID:
  					adapter->key_api_major_ver =
  							api_rev->major_ver;
  					adapter->key_api_minor_ver =
  							api_rev->minor_ver;
  					mwifiex_dbg(adapter, INFO,
  						    "key_api v%d.%d
  ",
  						    adapter->key_api_major_ver,
  						    adapter->key_api_minor_ver);
  					break;
  				case FW_API_VER_ID:
  					adapter->fw_api_ver =
  							api_rev->major_ver;
  					mwifiex_dbg(adapter, INFO,
  						    "Firmware api version %d
  ",
  						    adapter->fw_api_ver);
  					break;
  				default:
  					mwifiex_dbg(adapter, FATAL,
  						    "Unknown api_id: %d
  ",
  						    api_id);
  					break;
  				}
  				break;
  			default:
  				mwifiex_dbg(adapter, FATAL,
  					    "Unknown GET_HW_SPEC TLV type: %#x
  ",
  					    le16_to_cpu(tlv->type));
  				break;
  			}
  			parsed_len += le16_to_cpu(tlv->len) +
  				      sizeof(struct mwifiex_ie_types_header);
  			left_len -= le16_to_cpu(tlv->len) +
  				      sizeof(struct mwifiex_ie_types_header);
  		}
  	}
  
  	mwifiex_dbg(adapter, INFO,
  		    "info: GET_HW_SPEC: fw_release_number- %#x
  ",
  		    adapter->fw_release_number);
  	mwifiex_dbg(adapter, INFO,
  		    "info: GET_HW_SPEC: permanent addr: %pM
  ",
  		    hw_spec->permanent_addr);
  	mwifiex_dbg(adapter, INFO,
  		    "info: GET_HW_SPEC: hw_if_version=%#x version=%#x
  ",
  		    le16_to_cpu(hw_spec->hw_if_version),
  		    le16_to_cpu(hw_spec->version));
  
  	ether_addr_copy(priv->adapter->perm_addr, hw_spec->permanent_addr);
  	adapter->region_code = le16_to_cpu(hw_spec->region_code);
  
  	for (i = 0; i < MWIFIEX_MAX_REGION_CODE; i++)
  		/* Use the region code to search for the index */
  		if (adapter->region_code == region_code_index[i])
  			break;
  
  	/* If it's unidentified region code, use the default (USA) */
  	if (i >= MWIFIEX_MAX_REGION_CODE) {
  		adapter->region_code = 0x10;
  		mwifiex_dbg(adapter, WARN,
  			    "cmd: unknown region code, use default (USA)
  ");
  	}
  
  	adapter->hw_dot_11n_dev_cap = le32_to_cpu(hw_spec->dot_11n_dev_cap);
  	adapter->hw_dev_mcs_support = hw_spec->dev_mcs_support;
  	adapter->user_dev_mcs_support = adapter->hw_dev_mcs_support;
  
  	if (adapter->if_ops.update_mp_end_port)
  		adapter->if_ops.update_mp_end_port(adapter,
  					le16_to_cpu(hw_spec->mp_end_port));
  
  	if (adapter->fw_api_ver == MWIFIEX_FW_V15)
  		adapter->scan_chan_gap_enabled = true;
  
  	return 0;
  }