Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1604 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/mwifiex/cmdevt.c b/kernel/drivers/net/wireless/mwifiex/cmdevt.c
new file mode 100644
index 000000000..c5a14ff7e
--- /dev/null
+++ b/kernel/drivers/net/wireless/mwifiex/cmdevt.c
@@ -0,0 +1,1604 @@
+/*
+ * 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)) {
+		dev_err(adapter->dev, "GET_CMD_NODE: cmd node not available\n");
+		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);
+	dev_dbg(priv->adapter->dev, "cmd: host cmd size = %d\n", 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) {
+		dev_err(adapter->dev, "DNLD_CMD: host_cmd is null"
+			" or cmd size is 0, not sending\n");
+		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) {
+		dev_err(adapter->dev,
+			"DNLD_CMD: FW in reset state, ignore cmd %#x\n",
+			cmd_code);
+		if (cmd_node->wait_q_enabled)
+			mwifiex_complete_cmd(adapter, cmd_node);
+		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);
+
+	dev_dbg(adapter->dev,
+		"cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x\n", cmd_code,
+		le16_to_cpu(*(__le16 *) ((u8 *) host_cmd + S_DS_GEN)), cmd_size,
+		le16_to_cpu(host_cmd->seq_num));
+
+	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) {
+		dev_err(adapter->dev, "DNLD_CMD: host to card failed\n");
+		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)));
+
+	dev_dbg(adapter->dev,
+		"cmd: DNLD_CMD: %#x, act %#x, len %d, seqno %#x\n",
+		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));
+
+	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) {
+		dev_err(adapter->dev, "SLEEP_CFM: failed\n");
+		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) {
+			dev_err(adapter->dev, "ALLOC_CMD_BUF: out of memory\n");
+			return -1;
+		}
+	}
+
+	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) {
+		dev_dbg(adapter->dev, "info: FREE_CMD_BUF: cmd_pool is null\n");
+		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) {
+			dev_dbg(adapter->dev, "cmd: free cmd buffer %d\n", 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) {
+		dev_dbg(adapter->dev, "cmd: free cmd pool\n");
+		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;
+	}
+
+	dev_dbg(adapter->dev, "EVENT: cause: %#x\n", 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\n");
+		return -1;
+	}
+
+	if (adapter->is_suspended) {
+		dev_err(adapter->dev, "PREP_CMD: device in suspended state\n");
+		return -1;
+	}
+
+	if (adapter->hs_enabling && cmd_no != HostCmd_CMD_802_11_HS_CFG_ENH) {
+		dev_err(adapter->dev, "PREP_CMD: host entering sleep state\n");
+		return -1;
+	}
+
+	if (adapter->surprise_removed) {
+		dev_err(adapter->dev, "PREP_CMD: card is removed\n");
+		return -1;
+	}
+
+	if (adapter->is_cmd_timedout) {
+		dev_err(adapter->dev, "PREP_CMD: FW is in bad state\n");
+		return -1;
+	}
+
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_RESET) {
+		if (cmd_no != HostCmd_CMD_FUNC_INIT) {
+			dev_err(adapter->dev, "PREP_CMD: FW in reset state\n");
+			return -1;
+		}
+	}
+
+	/* Get a new command node */
+	cmd_node = mwifiex_get_cmd_node(adapter);
+
+	if (!cmd_node) {
+		dev_err(adapter->dev, "PREP_CMD: no free cmd node\n");
+		return -1;
+	}
+
+	/* Initialize the command node */
+	mwifiex_init_cmd_node(priv, cmd_node, cmd_oid, data_buf, sync);
+
+	if (!cmd_node->cmd_skb) {
+		dev_err(adapter->dev, "PREP_CMD: no free cmd buf\n");
+		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:
+			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) {
+		dev_err(adapter->dev, "PREP_CMD: cmd %#x preparation failed\n",
+			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);
+	dev_dbg(adapter->dev, "cmd: FREE_CMD: cmd=%#x, cmd_pending=%d\n",
+		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) {
+		dev_err(adapter->dev, "QUEUE_CMD: host_cmd is NULL\n");
+		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);
+	dev_dbg(adapter->dev, "cmd: QUEUE_CMD: cmd=%#x, cmd_pending=%d\n",
+		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) {
+		dev_err(adapter->dev, "EXEC_NEXT_CMD: cmd in processing\n");
+		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) {
+		dev_err(adapter->dev, "%s: cannot send cmd in sleep state,"
+				" this should not happen\n", __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;
+		dev_err(adapter->dev, "CMD_RESP: NULL curr_cmd, %#x\n",
+			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_CANCELED) {
+		dev_err(adapter->dev, "CMD_RESP: %#x been canceled\n",
+			le16_to_cpu(resp->command));
+		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) {
+		/* Copy original response back to response buffer */
+		struct mwifiex_ds_misc_cmd *hostcmd;
+		uint16_t size = le16_to_cpu(resp->size);
+		dev_dbg(adapter->dev, "info: host cmd resp size = %d\n", 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;
+
+	dev_dbg(adapter->dev,
+		"cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x\n",
+		orig_cmdresp_no, cmdresp_result,
+		le16_to_cpu(resp->size), le16_to_cpu(resp->seq_num));
+
+	if (!(orig_cmdresp_no & HostCmd_RET_BIT)) {
+		dev_err(adapter->dev, "CMD_RESP: invalid cmd resp\n");
+		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) {
+			dev_err(adapter->dev, "%s: cmd %#x failed during "
+				"initialization\n", __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) {
+		dev_dbg(adapter->dev, "cmd: empty curr_cmd\n");
+		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];
+		dev_err(adapter->dev,
+			"%s: Timeout cmd id = %#x, act = %#x\n", __func__,
+			adapter->dbg.timeout_cmd_id,
+			adapter->dbg.timeout_cmd_act);
+
+		dev_err(adapter->dev, "num_data_h2c_failure = %d\n",
+			adapter->dbg.num_tx_host_to_card_failure);
+		dev_err(adapter->dev, "num_cmd_h2c_failure = %d\n",
+			adapter->dbg.num_cmd_host_to_card_failure);
+
+		dev_err(adapter->dev, "is_cmd_timedout = %d\n",
+			adapter->is_cmd_timedout);
+		dev_err(adapter->dev, "num_tx_timeout = %d\n",
+			adapter->dbg.num_tx_timeout);
+
+		dev_err(adapter->dev, "last_cmd_index = %d\n",
+			adapter->dbg.last_cmd_index);
+		dev_err(adapter->dev, "last_cmd_id: %*ph\n",
+			(int)sizeof(adapter->dbg.last_cmd_id),
+			adapter->dbg.last_cmd_id);
+		dev_err(adapter->dev, "last_cmd_act: %*ph\n",
+			(int)sizeof(adapter->dbg.last_cmd_act),
+			adapter->dbg.last_cmd_act);
+
+		dev_err(adapter->dev, "last_cmd_resp_index = %d\n",
+			adapter->dbg.last_cmd_resp_index);
+		dev_err(adapter->dev, "last_cmd_resp_id: %*ph\n",
+			(int)sizeof(adapter->dbg.last_cmd_resp_id),
+			adapter->dbg.last_cmd_resp_id);
+
+		dev_err(adapter->dev, "last_event_index = %d\n",
+			adapter->dbg.last_event_index);
+		dev_err(adapter->dev, "last_event: %*ph\n",
+			(int)sizeof(adapter->dbg.last_event),
+			adapter->dbg.last_event);
+
+		dev_err(adapter->dev, "data_sent=%d cmd_sent=%d\n",
+			adapter->data_sent, adapter->cmd_sent);
+
+		dev_err(adapter->dev, "ps_mode=%d ps_state=%d\n",
+			adapter->ps_mode, adapter->ps_state);
+
+		if (cmd_node->wait_q_enabled) {
+			adapter->cmd_wait_q.status = -ETIMEDOUT;
+			wake_up_interruptible(&adapter->cmd_wait_q.wait);
+			mwifiex_cancel_pending_ioctl(adapter);
+		}
+	}
+	if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
+		mwifiex_init_fw_complete(adapter);
+
+	if (adapter->if_ops.fw_dump)
+		adapter->if_ops.fw_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);
+	}
+	/* 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_complete_cmd(adapter, cmd_node);
+			cmd_node->wait_q_enabled = false;
+		}
+		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) {
+				dev_dbg(adapter->dev, "info: aborting scan\n");
+				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;
+		cmd_node->wait_q_enabled = false;
+		cmd_node->cmd_flag |= CMD_F_CANCELED;
+		mwifiex_recycle_cmd_node(adapter, cmd_node);
+		mwifiex_complete_cmd(adapter, adapter->curr_cmd);
+		adapter->curr_cmd = NULL;
+		spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, cmd_flags);
+	}
+
+	/* 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) {
+				dev_dbg(adapter->dev, "info: aborting scan\n");
+				cfg80211_scan_done(priv->scan_request, 1);
+				priv->scan_request = NULL;
+			}
+		}
+	}
+	adapter->cmd_wait_q.status = -1;
+}
+
+/*
+ * 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
+		dev_dbg(adapter->dev,
+			"cmd: Delay Sleep Confirm (%s%s%s)\n",
+			(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);
+			dev_dbg(priv->adapter->dev, "event: hs_activated\n");
+			priv->adapter->hs_activate_wait_q_woken = true;
+			wake_up_interruptible(
+				&priv->adapter->hs_activate_wait_q);
+		} else {
+			dev_dbg(priv->adapter->dev, "event: HS not configured\n");
+		}
+	} else {
+		dev_dbg(priv->adapter->dev, "event: hs_deactivated\n");
+		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 {
+		dev_dbg(adapter->dev, "cmd: CMD_RESP: HS_CFG cmd reply"
+			" result=%#x, conditions=0x%x gpio=0x%x gap=0x%x\n",
+			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)
+{
+	dev_dbg(adapter->dev, "info: %s: auto cancelling host sleep"
+		" since there is interrupt from the firmware\n", __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) {
+		dev_err(adapter->dev, "%s: cmd size is 0\n", __func__);
+		return;
+	}
+
+	dev_dbg(adapter->dev,
+		"cmd: CMD_RESP: 0x%x, result %d, len %d, seqno 0x%x\n",
+		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) {
+		dev_err(adapter->dev,
+			"%s: rcvd unexpected resp for cmd %#x, result = %x\n",
+			__func__, command, result);
+		return;
+	}
+
+	if (result) {
+		dev_err(adapter->dev, "%s: sleep confirm cmd failed\n",
+			__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);
+			dev_dbg(adapter->dev, "cmd: PS Command: Enter PS\n");
+			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;
+			dev_dbg(priv->adapter->dev,
+				"cmd: PS Command: Enter Auto Deep Sleep\n");
+			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);
+
+	dev_dbg(adapter->dev,
+		"info: %s: PS_MODE cmd reply result=%#x action=%#X\n",
+		__func__, resp->result, action);
+	if (action == EN_AUTO_PS) {
+		if (auto_ps_bitmap & BITMAP_AUTO_DS) {
+			dev_dbg(adapter->dev, "cmd: Enabled auto deep sleep\n");
+			priv->adapter->is_deep_sleep = true;
+		}
+		if (auto_ps_bitmap & BITMAP_STA_PS) {
+			dev_dbg(adapter->dev, "cmd: Enabled STA power save\n");
+			if (adapter->sleep_period.period)
+				dev_dbg(adapter->dev,
+					"cmd: set to uapsd/pps mode\n");
+		}
+	} else if (action == DIS_AUTO_PS) {
+		if (ps_bitmap & BITMAP_AUTO_DS) {
+			priv->adapter->is_deep_sleep = false;
+			dev_dbg(adapter->dev, "cmd: Disabled auto deep sleep\n");
+		}
+		if (ps_bitmap & BITMAP_STA_PS) {
+			dev_dbg(adapter->dev, "cmd: Disabled STA power save\n");
+			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;
+
+		dev_dbg(adapter->dev, "cmd: ps_bitmap=%#x\n", 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;
+					dev_dbg(adapter->dev,
+						"key_api v%d.%d\n",
+						adapter->key_api_major_ver,
+						adapter->key_api_minor_ver);
+					break;
+				case FW_API_VER_ID:
+					adapter->fw_api_ver =
+							api_rev->major_ver;
+					dev_dbg(adapter->dev,
+						"Firmware api version %d\n",
+						adapter->fw_api_ver);
+					break;
+				default:
+					dev_warn(adapter->dev,
+						 "Unknown api_id: %d\n",
+						 api_id);
+					break;
+				}
+				break;
+			default:
+				dev_warn(adapter->dev,
+					 "Unknown GET_HW_SPEC TLV type: %#x\n",
+					 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);
+		}
+	}
+
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: fw_release_number- %#x\n",
+		adapter->fw_release_number);
+	dev_dbg(adapter->dev, "info: GET_HW_SPEC: permanent addr: %pM\n",
+		hw_spec->permanent_addr);
+	dev_dbg(adapter->dev,
+		"info: GET_HW_SPEC: hw_if_version=%#x version=%#x\n",
+		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;
+		dev_dbg(adapter->dev,
+			"cmd: unknown region code, use default (USA)\n");
+	}
+
+	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;
+}