drivers/net/wireless/mwifiex/init.c - android_kernel_htc_msm8960 - Gitiles

 /*
  * Marvell Wireless LAN device driver: HW/FW Initialization
  *
  * Copyright (C) 2011, Marvell International Ltd.
  *
  * This software file (the "File") is distributed by Marvell International
  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  * (the "License").  You may use, redistribute and/or modify this File in
  * accordance with the terms and conditions of the License, a copy of which
  * is available by writing to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  *
  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  * this warranty disclaimer.
  */

 #include "decl.h"
 #include "ioctl.h"
 #include "util.h"
 #include "fw.h"
 #include "main.h"
 #include "wmm.h"
 #include "11n.h"

 /*
  * This function adds a BSS priority table to the table list.
  *
  * The function allocates a new BSS priority table node and adds it to
  * the end of BSS priority table list, kept in driver memory.
  */
 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
 {
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct mwifiex_bss_prio_node *bss_prio;
 	unsigned long flags;

 	bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
 	if (!bss_prio) {
 		dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
 						__func__);
 		return -ENOMEM;
 	}

 	bss_prio->priv = priv;
 	INIT_LIST_HEAD(&bss_prio->list);
 	if (!adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur)
 		adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
 			bss_prio;

 	spin_lock_irqsave(&adapter->bss_prio_tbl[priv->bss_priority]
 			.bss_prio_lock, flags);
 	list_add_tail(&bss_prio->list,
 			&adapter->bss_prio_tbl[priv->bss_priority]
 			.bss_prio_head);
 	spin_unlock_irqrestore(&adapter->bss_prio_tbl[priv->bss_priority]
 			.bss_prio_lock, flags);

 	return 0;
 }

 /*
  * This function initializes the private structure and sets default
  * values to the members.
  *
  * Additionally, it also initializes all the locks and sets up all the
  * lists.
  */
 static int mwifiex_init_priv(struct mwifiex_private *priv)
 {
 	u32 i;

 	priv->media_connected = false;
 	memset(priv->curr_addr, 0xff, ETH_ALEN);

 	priv->pkt_tx_ctrl = 0;
 	priv->bss_mode = NL80211_IFTYPE_STATION;
 	priv->data_rate = 0;	/* Initially indicate the rate as auto */
 	priv->is_data_rate_auto = true;
 	priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
 	priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;

 	priv->sec_info.wep_status = MWIFIEX_802_11_WEP_DISABLED;
 	priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
 	priv->sec_info.encryption_mode = 0;
 	for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
 		memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
 	priv->wep_key_curr_index = 0;
 	priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
 				HostCmd_ACT_MAC_ETHERNETII_ENABLE;

 	priv->beacon_period = 100; /* beacon interval */ ;
 	priv->attempted_bss_desc = NULL;
 	memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
 	priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;

 	memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 	memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 	memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 	priv->assoc_rsp_size = 0;
 	priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 	priv->atim_window = 0;
 	priv->adhoc_state = ADHOC_IDLE;
 	priv->tx_power_level = 0;
 	priv->max_tx_power_level = 0;
 	priv->min_tx_power_level = 0;
 	priv->tx_rate = 0;
 	priv->rxpd_htinfo = 0;
 	priv->rxpd_rate = 0;
 	priv->rate_bitmap = 0;
 	priv->data_rssi_last = 0;
 	priv->data_rssi_avg = 0;
 	priv->data_nf_avg = 0;
 	priv->data_nf_last = 0;
 	priv->bcn_rssi_last = 0;
 	priv->bcn_rssi_avg = 0;
 	priv->bcn_nf_avg = 0;
 	priv->bcn_nf_last = 0;
 	memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 	memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 	priv->wpa_ie_len = 0;
 	priv->wpa_is_gtk_set = false;

 	memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 	priv->assoc_tlv_buf_len = 0;
 	memset(&priv->wps, 0, sizeof(priv->wps));
 	memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 	priv->gen_ie_buf_len = 0;
 	memset(priv->vs_ie, 0, sizeof(priv->vs_ie));

 	priv->wmm_required = true;
 	priv->wmm_enabled = false;
 	priv->wmm_qosinfo = 0;
 	priv->curr_bcn_buf = NULL;
 	priv->curr_bcn_size = 0;

 	priv->scan_block = false;

 	return mwifiex_add_bss_prio_tbl(priv);
 }

 /*
  * This function allocates buffers for members of the adapter
  * structure.
  *
  * The memory allocated includes scan table, command buffers, and
  * sleep confirm command buffer. In addition, the queues are
  * also initialized.
  */
 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 {
 	int ret;
 	u32 buf_size;
 	struct mwifiex_bssdescriptor *temp_scan_table;

 	/* Allocate buffer to store the BSSID list */
 	buf_size = sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP;
 	temp_scan_table = kzalloc(buf_size, GFP_KERNEL);
 	if (!temp_scan_table) {
 		dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
 		       __func__);
 		return -ENOMEM;
 	}

 	adapter->scan_table = temp_scan_table;

 	/* Allocate command buffer */
 	ret = mwifiex_alloc_cmd_buffer(adapter);
 	if (ret) {
 		dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 		       __func__);
 		return -1;
 	}

 	adapter->sleep_cfm =
 		dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 				+ INTF_HEADER_LEN);

 	if (!adapter->sleep_cfm) {
 		dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 			" cmd buffer\n", __func__);
 		return -1;
 	}
 	skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);

 	return 0;
 }

 /*
  * This function initializes the adapter structure and sets default
  * values to the members of adapter.
  *
  * This also initializes the WMM related parameters in the driver private
  * structures.
  */
 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 {
 	struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;

 	skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 	sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 						(adapter->sleep_cfm->data);

 	adapter->cmd_sent = false;
 	adapter->data_sent = true;
 	adapter->cmd_resp_received = false;
 	adapter->event_received = false;
 	adapter->data_received = false;

 	adapter->surprise_removed = false;

 	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;

 	adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 	adapter->ps_state = PS_STATE_AWAKE;
 	adapter->need_to_wakeup = false;

 	adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 	adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 	adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 	adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;

 	adapter->num_in_scan_table = 0;
 	memset(adapter->scan_table, 0,
 	       (sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP));
 	adapter->scan_probes = 1;

 	memset(adapter->bcn_buf, 0, sizeof(adapter->bcn_buf));
 	adapter->bcn_buf_end = adapter->bcn_buf;

 	adapter->multiple_dtim = 1;

 	adapter->local_listen_interval = 0;	/* default value in firmware
 						   will be used */

 	adapter->is_deep_sleep = false;

 	adapter->delay_null_pkt = false;
 	adapter->delay_to_ps = 1000;
 	adapter->enhanced_ps_mode = PS_MODE_AUTO;

 	adapter->gen_null_pkt = false;	/* Disable NULL Pkg generation by
 					   default */
 	adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 					   default */
 	adapter->pm_wakeup_card_req = false;

 	adapter->pm_wakeup_fw_try = false;

 	adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 	adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 	adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;

 	adapter->is_hs_configured = false;
 	adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 	adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 	adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 	adapter->hs_activated = false;

 	memset(adapter->event_body, 0, sizeof(adapter->event_body));
 	adapter->hw_dot_11n_dev_cap = 0;
 	adapter->hw_dev_mcs_support = 0;
 	adapter->chan_offset = 0;
 	adapter->adhoc_11n_enabled = false;

 	mwifiex_wmm_init(adapter);

 	if (adapter->sleep_cfm) {
 		memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 		sleep_cfm_buf->command =
 				cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 		sleep_cfm_buf->size =
 				cpu_to_le16(adapter->sleep_cfm->len);
 		sleep_cfm_buf->result = 0;
 		sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 		sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 	}
 	memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 	memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 	adapter->tx_lock_flag = false;
 	adapter->null_pkt_interval = 0;
 	adapter->fw_bands = 0;
 	adapter->config_bands = 0;
 	adapter->adhoc_start_band = 0;
 	adapter->scan_channels = NULL;
 	adapter->fw_release_number = 0;
 	adapter->fw_cap_info = 0;
 	memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 	adapter->event_cause = 0;
 	adapter->region_code = 0;
 	adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 	adapter->adhoc_awake_period = 0;
 	memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 	adapter->arp_filter_size = 0;
 }

 /*
  * This function frees the adapter structure.
  *
  * The freeing operation is done recursively, by canceling all
  * pending commands, freeing the member buffers previously
  * allocated (command buffers, scan table buffer, sleep confirm
  * command buffer), stopping the timers and calling the cleanup
  * routines for every interface, before the actual adapter
  * structure is freed.
  */
 static void
 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 {
 	if (!adapter) {
 		pr_err("%s: adapter is NULL\n", __func__);
 		return;
 	}

 	mwifiex_cancel_all_pending_cmd(adapter);

 	/* Free lock variables */
 	mwifiex_free_lock_list(adapter);

 	/* Free command buffer */
 	dev_dbg(adapter->dev, "info: free cmd buffer\n");
 	mwifiex_free_cmd_buffer(adapter);

 	del_timer(&adapter->cmd_timer);

 	dev_dbg(adapter->dev, "info: free scan table\n");
 	kfree(adapter->scan_table);
 	adapter->scan_table = NULL;

 	adapter->if_ops.cleanup_if(adapter);

 	dev_kfree_skb_any(adapter->sleep_cfm);
 }

 /*
  *  This function intializes the lock variables and
  *  the list heads.
  */
 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 {
 	struct mwifiex_private *priv;
 	s32 i, j;

 	spin_lock_init(&adapter->mwifiex_lock);
 	spin_lock_init(&adapter->int_lock);
 	spin_lock_init(&adapter->main_proc_lock);
 	spin_lock_init(&adapter->mwifiex_cmd_lock);
 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			priv = adapter->priv[i];
 			spin_lock_init(&priv->rx_pkt_lock);
 			spin_lock_init(&priv->wmm.ra_list_spinlock);
 			spin_lock_init(&priv->curr_bcn_buf_lock);
 		}
 	}

 	/* Initialize cmd_free_q */
 	INIT_LIST_HEAD(&adapter->cmd_free_q);
 	/* Initialize cmd_pending_q */
 	INIT_LIST_HEAD(&adapter->cmd_pending_q);
 	/* Initialize scan_pending_q */
 	INIT_LIST_HEAD(&adapter->scan_pending_q);

 	spin_lock_init(&adapter->cmd_free_q_lock);
 	spin_lock_init(&adapter->cmd_pending_q_lock);
 	spin_lock_init(&adapter->scan_pending_q_lock);

 	for (i = 0; i < adapter->priv_num; ++i) {
 		INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 		adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 		spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 	}

 	for (i = 0; i < adapter->priv_num; i++) {
 		if (!adapter->priv[i])
 			continue;
 		priv = adapter->priv[i];
 		for (j = 0; j < MAX_NUM_TID; ++j) {
 			INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 			spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 		}
 		INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 		INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);

 		spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 		spin_lock_init(&priv->rx_reorder_tbl_lock);
 	}

 	return 0;
 }

 /*
  *  This function releases the lock variables and frees the locks and
  *  associated locks.
  */
 void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 {
 	struct mwifiex_private *priv;
 	s32 i, j;

 	/* Free lists */
 	list_del(&adapter->cmd_free_q);
 	list_del(&adapter->cmd_pending_q);
 	list_del(&adapter->scan_pending_q);

 	for (i = 0; i < adapter->priv_num; i++)
 		list_del(&adapter->bss_prio_tbl[i].bss_prio_head);

 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			priv = adapter->priv[i];
 			for (j = 0; j < MAX_NUM_TID; ++j)
 				list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 			list_del(&priv->tx_ba_stream_tbl_ptr);
 			list_del(&priv->rx_reorder_tbl_ptr);
 		}
 	}
 }

 /*
  * This function initializes the firmware.
  *
  * The following operations are performed sequentially -
  *      - Allocate adapter structure
  *      - Initialize the adapter structure
  *      - Initialize the private structure
  *      - Add BSS priority tables to the adapter structure
  *      - For each interface, send the init commands to firmware
  *      - Send the first command in command pending queue, if available
  */
 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 {
 	int ret;
 	struct mwifiex_private *priv;
 	u8 i, first_sta = true;
 	int is_cmd_pend_q_empty;
 	unsigned long flags;

 	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;

 	/* Allocate memory for member of adapter structure */
 	ret = mwifiex_allocate_adapter(adapter);
 	if (ret)
 		return -1;

 	/* Initialize adapter structure */
 	mwifiex_init_adapter(adapter);

 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			priv = adapter->priv[i];

 			/* Initialize private structure */
 			ret = mwifiex_init_priv(priv);
 			if (ret)
 				return -1;
 		}
 	}
 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 			if (ret == -1)
 				return -1;

 			first_sta = false;
 		}
 	}

 	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 	is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 	if (!is_cmd_pend_q_empty) {
 		/* Send the first command in queue and return */
 		if (mwifiex_main_process(adapter) != -1)
 			ret = -EINPROGRESS;
 	} else {
 		adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 	}

 	return ret;
 }

 /*
  * This function deletes the BSS priority tables.
  *
  * The function traverses through all the allocated BSS priority nodes
  * in every BSS priority table and frees them.
  */
 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 {
 	int i;
 	struct mwifiex_adapter *adapter = priv->adapter;
 	struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 	struct list_head *head;
 	spinlock_t *lock;
 	unsigned long flags;

 	for (i = 0; i < adapter->priv_num; ++i) {
 		head = &adapter->bss_prio_tbl[i].bss_prio_head;
 		cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 		lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 		dev_dbg(adapter->dev, "info: delete BSS priority table,"
 				" index = %d, i = %d, head = %p, cur = %p\n",
 			      priv->bss_index, i, head, *cur);
 		if (*cur) {
 			spin_lock_irqsave(lock, flags);
 			if (list_empty(head)) {
 				spin_unlock_irqrestore(lock, flags);
 				continue;
 			}
 			bssprio_node = list_first_entry(head,
 					struct mwifiex_bss_prio_node, list);
 			spin_unlock_irqrestore(lock, flags);

 			list_for_each_entry_safe(bssprio_node, tmp_node, head,
 						 list) {
 				if (bssprio_node->priv == priv) {
 					dev_dbg(adapter->dev, "info: Delete "
 						"node %p, next = %p\n",
 						bssprio_node, tmp_node);
 					spin_lock_irqsave(lock, flags);
 					list_del(&bssprio_node->list);
 					spin_unlock_irqrestore(lock, flags);
 					kfree(bssprio_node);
 				}
 			}
 			*cur = (struct mwifiex_bss_prio_node *)head;
 		}
 	}
 }

 /*
  * This function is used to shutdown the driver.
  *
  * The following operations are performed sequentially -
  *      - Check if already shut down
  *      - Make sure the main process has stopped
  *      - Clean up the Tx and Rx queues
  *      - Delete BSS priority tables
  *      - Free the adapter
  *      - Notify completion
  */
 int
 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 {
 	int ret = -EINPROGRESS;
 	struct mwifiex_private *priv;
 	s32 i;
 	unsigned long flags;

 	/* mwifiex already shutdown */
 	if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 		return 0;

 	adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 	/* wait for mwifiex_process to complete */
 	if (adapter->mwifiex_processing) {
 		dev_warn(adapter->dev, "main process is still running\n");
 		return ret;
 	}

 	/* shut down mwifiex */
 	dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");

 	/* Clean up Tx/Rx queues and delete BSS priority table */
 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			priv = adapter->priv[i];

 			mwifiex_clean_txrx(priv);
 			mwifiex_delete_bss_prio_tbl(priv);
 		}
 	}

 	spin_lock_irqsave(&adapter->mwifiex_lock, flags);

 	/* Free adapter structure */
 	mwifiex_free_adapter(adapter);

 	spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);

 	/* Notify completion */
 	ret = mwifiex_shutdown_fw_complete(adapter);

 	return ret;
 }

 /*
  * This function downloads the firmware to the card.
  *
  * The actual download is preceded by two sanity checks -
  *      - Check if firmware is already running
  *      - Check if the interface is the winner to download the firmware
  *
  * ...and followed by another -
  *      - Check if the firmware is downloaded successfully
  *
  * After download is successfully completed, the host interrupts are enabled.
  */
 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 		    struct mwifiex_fw_image *pmfw)
 {
 	int ret, winner;
 	u32 poll_num = 1;

 	/* Check if firmware is already running */
 	ret = adapter->if_ops.check_fw_status(adapter, poll_num, &winner);
 	if (!ret) {
 		dev_notice(adapter->dev,
 				"WLAN FW already running! Skip FW download\n");
 		goto done;
 	}
 	poll_num = MAX_FIRMWARE_POLL_TRIES;

 	/* Check if we are the winner for downloading FW */
 	if (!winner) {
 		dev_notice(adapter->dev,
 				"Other interface already running!"
 				" Skip FW download\n");
 		poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 		goto poll_fw;
 	}
 	if (pmfw) {
 		/* Download firmware with helper */
 		ret = adapter->if_ops.prog_fw(adapter, pmfw);
 		if (ret) {
 			dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 			return ret;
 		}
 	}

 poll_fw:
 	/* Check if the firmware is downloaded successfully or not */
 	ret = adapter->if_ops.check_fw_status(adapter, poll_num, NULL);
 	if (ret) {
 		dev_err(adapter->dev, "FW failed to be active in time\n");
 		return -1;
 	}
 done:
 	/* re-enable host interrupt for mwifiex after fw dnld is successful */
 	adapter->if_ops.enable_int(adapter);
 	return ret;
 }
	/*
	* Marvell Wireless LAN device driver: HW/FW Initialization
	*
	* Copyright (C) 2011, Marvell International Ltd.
	*
	* This software file (the "File") is distributed by Marvell International
	* Ltd. under the terms of the GNU General Public License Version 2, June 1991
	* (the "License"). You may use, redistribute and/or modify this File in
	* accordance with the terms and conditions of the License, a copy of which
	* is available by writing to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
	* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
	*
	* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
	* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
	* this warranty disclaimer.
	*/

	#include "decl.h"
	#include "ioctl.h"
	#include "util.h"
	#include "fw.h"
	#include "main.h"
	#include "wmm.h"
	#include "11n.h"

	/*
	* This function adds a BSS priority table to the table list.
	*
	* The function allocates a new BSS priority table node and adds it to
	* the end of BSS priority table list, kept in driver memory.
	*/
	static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
	{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct mwifiex_bss_prio_node *bss_prio;
	unsigned long flags;

	bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
	if (!bss_prio) {
	dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
	__func__);
	return -ENOMEM;
	}

	bss_prio->priv = priv;
	INIT_LIST_HEAD(&bss_prio->list);
	if (!adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur)
	adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
	bss_prio;

	spin_lock_irqsave(&adapter->bss_prio_tbl[priv->bss_priority]
	.bss_prio_lock, flags);
	list_add_tail(&bss_prio->list,
	&adapter->bss_prio_tbl[priv->bss_priority]
	.bss_prio_head);
	spin_unlock_irqrestore(&adapter->bss_prio_tbl[priv->bss_priority]
	.bss_prio_lock, flags);

	return 0;
	}

	/*
	* This function initializes the private structure and sets default
	* values to the members.
	*
	* Additionally, it also initializes all the locks and sets up all the
	* lists.
	*/
	static int mwifiex_init_priv(struct mwifiex_private *priv)
	{
	u32 i;

	priv->media_connected = false;
	memset(priv->curr_addr, 0xff, ETH_ALEN);

	priv->pkt_tx_ctrl = 0;
	priv->bss_mode = NL80211_IFTYPE_STATION;
	priv->data_rate = 0; /* Initially indicate the rate as auto */
	priv->is_data_rate_auto = true;
	priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
	priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;

	priv->sec_info.wep_status = MWIFIEX_802_11_WEP_DISABLED;
	priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
	priv->sec_info.encryption_mode = 0;
	for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
	memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
	priv->wep_key_curr_index = 0;
	priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON \| HostCmd_ACT_MAC_TX_ON \|
	HostCmd_ACT_MAC_ETHERNETII_ENABLE;

	priv->beacon_period = 100; /* beacon interval */ ;
	priv->attempted_bss_desc = NULL;
	memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
	priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;

	memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
	memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
	memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
	priv->assoc_rsp_size = 0;
	priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
	priv->atim_window = 0;
	priv->adhoc_state = ADHOC_IDLE;
	priv->tx_power_level = 0;
	priv->max_tx_power_level = 0;
	priv->min_tx_power_level = 0;
	priv->tx_rate = 0;
	priv->rxpd_htinfo = 0;
	priv->rxpd_rate = 0;
	priv->rate_bitmap = 0;
	priv->data_rssi_last = 0;
	priv->data_rssi_avg = 0;
	priv->data_nf_avg = 0;
	priv->data_nf_last = 0;
	priv->bcn_rssi_last = 0;
	priv->bcn_rssi_avg = 0;
	priv->bcn_nf_avg = 0;
	priv->bcn_nf_last = 0;
	memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
	memset(&priv->aes_key, 0, sizeof(priv->aes_key));
	priv->wpa_ie_len = 0;
	priv->wpa_is_gtk_set = false;

	memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
	priv->assoc_tlv_buf_len = 0;
	memset(&priv->wps, 0, sizeof(priv->wps));
	memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
	priv->gen_ie_buf_len = 0;
	memset(priv->vs_ie, 0, sizeof(priv->vs_ie));

	priv->wmm_required = true;
	priv->wmm_enabled = false;
	priv->wmm_qosinfo = 0;
	priv->curr_bcn_buf = NULL;
	priv->curr_bcn_size = 0;

	priv->scan_block = false;

	return mwifiex_add_bss_prio_tbl(priv);
	}

	/*
	* This function allocates buffers for members of the adapter
	* structure.
	*
	* The memory allocated includes scan table, command buffers, and
	* sleep confirm command buffer. In addition, the queues are
	* also initialized.
	*/
	static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
	{
	int ret;
	u32 buf_size;
	struct mwifiex_bssdescriptor *temp_scan_table;

	/* Allocate buffer to store the BSSID list */
	buf_size = sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP;
	temp_scan_table = kzalloc(buf_size, GFP_KERNEL);
	if (!temp_scan_table) {
	dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
	__func__);
	return -ENOMEM;
	}

	adapter->scan_table = temp_scan_table;

	/* Allocate command buffer */
	ret = mwifiex_alloc_cmd_buffer(adapter);
	if (ret) {
	dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
	__func__);
	return -1;
	}

	adapter->sleep_cfm =
	dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
	+ INTF_HEADER_LEN);

	if (!adapter->sleep_cfm) {
	dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
	" cmd buffer\n", __func__);
	return -1;
	}
	skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);

	return 0;
	}

	/*
	* This function initializes the adapter structure and sets default
	* values to the members of adapter.
	*
	* This also initializes the WMM related parameters in the driver private
	* structures.
	*/
	static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
	{
	struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;

	skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
	sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
	(adapter->sleep_cfm->data);

	adapter->cmd_sent = false;
	adapter->data_sent = true;
	adapter->cmd_resp_received = false;
	adapter->event_received = false;
	adapter->data_received = false;

	adapter->surprise_removed = false;

	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;

	adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
	adapter->ps_state = PS_STATE_AWAKE;
	adapter->need_to_wakeup = false;

	adapter->scan_mode = HostCmd_BSS_MODE_ANY;
	adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
	adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
	adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;

	adapter->num_in_scan_table = 0;
	memset(adapter->scan_table, 0,
	(sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP));
	adapter->scan_probes = 1;

	memset(adapter->bcn_buf, 0, sizeof(adapter->bcn_buf));
	adapter->bcn_buf_end = adapter->bcn_buf;

	adapter->multiple_dtim = 1;

	adapter->local_listen_interval = 0; /* default value in firmware
	will be used */

	adapter->is_deep_sleep = false;

	adapter->delay_null_pkt = false;
	adapter->delay_to_ps = 1000;
	adapter->enhanced_ps_mode = PS_MODE_AUTO;

	adapter->gen_null_pkt = false; /* Disable NULL Pkg generation by
	default */
	adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
	default */
	adapter->pm_wakeup_card_req = false;

	adapter->pm_wakeup_fw_try = false;

	adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
	adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
	adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;

	adapter->is_hs_configured = false;
	adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
	adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
	adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
	adapter->hs_activated = false;

	memset(adapter->event_body, 0, sizeof(adapter->event_body));
	adapter->hw_dot_11n_dev_cap = 0;
	adapter->hw_dev_mcs_support = 0;
	adapter->chan_offset = 0;
	adapter->adhoc_11n_enabled = false;

	mwifiex_wmm_init(adapter);

	if (adapter->sleep_cfm) {
	memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
	sleep_cfm_buf->command =
	cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
	sleep_cfm_buf->size =
	cpu_to_le16(adapter->sleep_cfm->len);
	sleep_cfm_buf->result = 0;
	sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
	sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
	}
	memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
	memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
	adapter->tx_lock_flag = false;
	adapter->null_pkt_interval = 0;
	adapter->fw_bands = 0;
	adapter->config_bands = 0;
	adapter->adhoc_start_band = 0;
	adapter->scan_channels = NULL;
	adapter->fw_release_number = 0;
	adapter->fw_cap_info = 0;
	memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
	adapter->event_cause = 0;
	adapter->region_code = 0;
	adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
	adapter->adhoc_awake_period = 0;
	memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
	adapter->arp_filter_size = 0;
	}

	/*
	* This function frees the adapter structure.
	*
	* The freeing operation is done recursively, by canceling all
	* pending commands, freeing the member buffers previously
	* allocated (command buffers, scan table buffer, sleep confirm
	* command buffer), stopping the timers and calling the cleanup
	* routines for every interface, before the actual adapter
	* structure is freed.
	*/
	static void
	mwifiex_free_adapter(struct mwifiex_adapter *adapter)
	{
	if (!adapter) {
	pr_err("%s: adapter is NULL\n", __func__);
	return;
	}

	mwifiex_cancel_all_pending_cmd(adapter);

	/* Free lock variables */
	mwifiex_free_lock_list(adapter);

	/* Free command buffer */
	dev_dbg(adapter->dev, "info: free cmd buffer\n");
	mwifiex_free_cmd_buffer(adapter);

	del_timer(&adapter->cmd_timer);

	dev_dbg(adapter->dev, "info: free scan table\n");
	kfree(adapter->scan_table);
	adapter->scan_table = NULL;

	adapter->if_ops.cleanup_if(adapter);

	dev_kfree_skb_any(adapter->sleep_cfm);
	}

	/*
	* This function intializes the lock variables and
	* the list heads.
	*/
	int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
	{
	struct mwifiex_private *priv;
	s32 i, j;

	spin_lock_init(&adapter->mwifiex_lock);
	spin_lock_init(&adapter->int_lock);
	spin_lock_init(&adapter->main_proc_lock);
	spin_lock_init(&adapter->mwifiex_cmd_lock);
	for (i = 0; i < adapter->priv_num; i++) {
	if (adapter->priv[i]) {
	priv = adapter->priv[i];
	spin_lock_init(&priv->rx_pkt_lock);
	spin_lock_init(&priv->wmm.ra_list_spinlock);
	spin_lock_init(&priv->curr_bcn_buf_lock);
	}
	}

	/* Initialize cmd_free_q */
	INIT_LIST_HEAD(&adapter->cmd_free_q);
	/* Initialize cmd_pending_q */
	INIT_LIST_HEAD(&adapter->cmd_pending_q);
	/* Initialize scan_pending_q */
	INIT_LIST_HEAD(&adapter->scan_pending_q);

	spin_lock_init(&adapter->cmd_free_q_lock);
	spin_lock_init(&adapter->cmd_pending_q_lock);
	spin_lock_init(&adapter->scan_pending_q_lock);

	for (i = 0; i < adapter->priv_num; ++i) {
	INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
	adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
	spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
	}

	for (i = 0; i < adapter->priv_num; i++) {
	if (!adapter->priv[i])
	continue;
	priv = adapter->priv[i];
	for (j = 0; j < MAX_NUM_TID; ++j) {
	INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
	spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
	}
	INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
	INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);

	spin_lock_init(&priv->tx_ba_stream_tbl_lock);
	spin_lock_init(&priv->rx_reorder_tbl_lock);
	}

	return 0;
	}

	/*
	* This function releases the lock variables and frees the locks and
	* associated locks.
	*/
	void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
	{
	struct mwifiex_private *priv;
	s32 i, j;

	/* Free lists */
	list_del(&adapter->cmd_free_q);
	list_del(&adapter->cmd_pending_q);
	list_del(&adapter->scan_pending_q);

	for (i = 0; i < adapter->priv_num; i++)
	list_del(&adapter->bss_prio_tbl[i].bss_prio_head);

	for (i = 0; i < adapter->priv_num; i++) {
	if (adapter->priv[i]) {
	priv = adapter->priv[i];
	for (j = 0; j < MAX_NUM_TID; ++j)
	list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
	list_del(&priv->tx_ba_stream_tbl_ptr);
	list_del(&priv->rx_reorder_tbl_ptr);
	}
	}
	}

	/*
	* This function initializes the firmware.
	*
	* The following operations are performed sequentially -
	* - Allocate adapter structure
	* - Initialize the adapter structure
	* - Initialize the private structure
	* - Add BSS priority tables to the adapter structure
	* - For each interface, send the init commands to firmware
	* - Send the first command in command pending queue, if available
	*/
	int mwifiex_init_fw(struct mwifiex_adapter *adapter)
	{
	int ret;
	struct mwifiex_private *priv;
	u8 i, first_sta = true;
	int is_cmd_pend_q_empty;
	unsigned long flags;

	adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;

	/* Allocate memory for member of adapter structure */
	ret = mwifiex_allocate_adapter(adapter);
	if (ret)
	return -1;

	/* Initialize adapter structure */
	mwifiex_init_adapter(adapter);

	for (i = 0; i < adapter->priv_num; i++) {
	if (adapter->priv[i]) {
	priv = adapter->priv[i];

	/* Initialize private structure */
	ret = mwifiex_init_priv(priv);
	if (ret)
	return -1;
	}
	}
	for (i = 0; i < adapter->priv_num; i++) {
	if (adapter->priv[i]) {
	ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
	if (ret == -1)
	return -1;

	first_sta = false;
	}
	}

	spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
	is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
	spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
	if (!is_cmd_pend_q_empty) {
	/* Send the first command in queue and return */
	if (mwifiex_main_process(adapter) != -1)
	ret = -EINPROGRESS;
	} else {
	adapter->hw_status = MWIFIEX_HW_STATUS_READY;
	}

	return ret;
	}

	/*
	* This function deletes the BSS priority tables.
	*
	* The function traverses through all the allocated BSS priority nodes
	* in every BSS priority table and frees them.
	*/
	static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
	{
	int i;
	struct mwifiex_adapter *adapter = priv->adapter;
	struct mwifiex_bss_prio_node bssprio_node, tmp_node, **cur;
	struct list_head *head;
	spinlock_t *lock;
	unsigned long flags;

	for (i = 0; i < adapter->priv_num; ++i) {
	head = &adapter->bss_prio_tbl[i].bss_prio_head;
	cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
	lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
	dev_dbg(adapter->dev, "info: delete BSS priority table,"
	" index = %d, i = %d, head = %p, cur = %p\n",
	priv->bss_index, i, head, *cur);
	if (*cur) {
	spin_lock_irqsave(lock, flags);
	if (list_empty(head)) {
	spin_unlock_irqrestore(lock, flags);
	continue;
	}
	bssprio_node = list_first_entry(head,
	struct mwifiex_bss_prio_node, list);
	spin_unlock_irqrestore(lock, flags);

	list_for_each_entry_safe(bssprio_node, tmp_node, head,
	list) {
	if (bssprio_node->priv == priv) {
	dev_dbg(adapter->dev, "info: Delete "
	"node %p, next = %p\n",
	bssprio_node, tmp_node);
	spin_lock_irqsave(lock, flags);
	list_del(&bssprio_node->list);
	spin_unlock_irqrestore(lock, flags);
	kfree(bssprio_node);
	}
	}
	cur = (struct mwifiex_bss_prio_node )head;
	}
	}
	}

	/*
	* This function is used to shutdown the driver.
	*
	* The following operations are performed sequentially -
	* - Check if already shut down
	* - Make sure the main process has stopped
	* - Clean up the Tx and Rx queues
	* - Delete BSS priority tables
	* - Free the adapter
	* - Notify completion
	*/
	int
	mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
	{
	int ret = -EINPROGRESS;
	struct mwifiex_private *priv;
	s32 i;
	unsigned long flags;

	/* mwifiex already shutdown */
	if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
	return 0;

	adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
	/* wait for mwifiex_process to complete */
	if (adapter->mwifiex_processing) {
	dev_warn(adapter->dev, "main process is still running\n");
	return ret;
	}

	/* shut down mwifiex */
	dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");

	/* Clean up Tx/Rx queues and delete BSS priority table */
	for (i = 0; i < adapter->priv_num; i++) {
	if (adapter->priv[i]) {
	priv = adapter->priv[i];

	mwifiex_clean_txrx(priv);
	mwifiex_delete_bss_prio_tbl(priv);
	}
	}

	spin_lock_irqsave(&adapter->mwifiex_lock, flags);

	/* Free adapter structure */
	mwifiex_free_adapter(adapter);

	spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);

	/* Notify completion */
	ret = mwifiex_shutdown_fw_complete(adapter);

	return ret;
	}

	/*
	* This function downloads the firmware to the card.
	*
	* The actual download is preceded by two sanity checks -
	* - Check if firmware is already running
	* - Check if the interface is the winner to download the firmware
	*
	* ...and followed by another -
	* - Check if the firmware is downloaded successfully
	*
	* After download is successfully completed, the host interrupts are enabled.
	*/
	int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
	struct mwifiex_fw_image *pmfw)
	{
	int ret, winner;
	u32 poll_num = 1;

	/* Check if firmware is already running */
	ret = adapter->if_ops.check_fw_status(adapter, poll_num, &winner);
	if (!ret) {
	dev_notice(adapter->dev,
	"WLAN FW already running! Skip FW download\n");
	goto done;
	}
	poll_num = MAX_FIRMWARE_POLL_TRIES;

	/* Check if we are the winner for downloading FW */
	if (!winner) {
	dev_notice(adapter->dev,
	"Other interface already running!"
	" Skip FW download\n");
	poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
	goto poll_fw;
	}
	if (pmfw) {
	/* Download firmware with helper */
	ret = adapter->if_ops.prog_fw(adapter, pmfw);
	if (ret) {
	dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
	return ret;
	}
	}

	poll_fw:
	/* Check if the firmware is downloaded successfully or not */
	ret = adapter->if_ops.check_fw_status(adapter, poll_num, NULL);
	if (ret) {
	dev_err(adapter->dev, "FW failed to be active in time\n");
	return -1;
	}
	done:
	/* re-enable host interrupt for mwifiex after fw dnld is successful */
	adapter->if_ops.enable_int(adapter);
	return ret;
	}