diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/main.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/main.c | 918 |
1 files changed, 918 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c new file mode 100644 index 0000000..9794165 --- /dev/null +++ b/drivers/net/wireless/mwifiex/main.c @@ -0,0 +1,918 @@ +/* + * Marvell Wireless LAN device driver: major functions + * + * 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 "main.h" +#include "wmm.h" +#include "cfg80211.h" +#include "11n.h" + +#define VERSION "1.0" + +const char driver_version[] = "mwifiex " VERSION " (%s) "; + +/* + * This function registers the device and performs all the necessary + * initializations. + * + * The following initialization operations are performed - + * - Allocate adapter structure + * - Save interface specific operations table in adapter + * - Call interface specific initialization routine + * - Allocate private structures + * - Set default adapter structure parameters + * - Initialize locks + * + * In case of any errors during inittialization, this function also ensures + * proper cleanup before exiting. + */ +static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops, + void **padapter) +{ + struct mwifiex_adapter *adapter; + int i; + + adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL); + if (!adapter) + return -ENOMEM; + + *padapter = adapter; + adapter->card = card; + + /* Save interface specific operations in adapter */ + memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops)); + + /* card specific initialization has been deferred until now .. */ + if (adapter->if_ops.init_if) + if (adapter->if_ops.init_if(adapter)) + goto error; + + adapter->priv_num = 0; + + for (i = 0; i < MWIFIEX_MAX_BSS_NUM; i++) { + /* Allocate memory for private structure */ + adapter->priv[i] = + kzalloc(sizeof(struct mwifiex_private), GFP_KERNEL); + if (!adapter->priv[i]) + goto error; + + adapter->priv[i]->adapter = adapter; + adapter->priv_num++; + } + mwifiex_init_lock_list(adapter); + + init_timer(&adapter->cmd_timer); + adapter->cmd_timer.function = mwifiex_cmd_timeout_func; + adapter->cmd_timer.data = (unsigned long) adapter; + + return 0; + +error: + dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n"); + + for (i = 0; i < adapter->priv_num; i++) + kfree(adapter->priv[i]); + + kfree(adapter); + + return -1; +} + +/* + * This function unregisters the device and performs all the necessary + * cleanups. + * + * The following cleanup operations are performed - + * - Free the timers + * - Free beacon buffers + * - Free private structures + * - Free adapter structure + */ +static int mwifiex_unregister(struct mwifiex_adapter *adapter) +{ + s32 i; + + del_timer(&adapter->cmd_timer); + + /* Free private structures */ + for (i = 0; i < adapter->priv_num; i++) { + if (adapter->priv[i]) { + mwifiex_free_curr_bcn(adapter->priv[i]); + kfree(adapter->priv[i]); + } + } + + kfree(adapter); + return 0; +} + +/* + * The main process. + * + * This function is the main procedure of the driver and handles various driver + * operations. It runs in a loop and provides the core functionalities. + * + * The main responsibilities of this function are - + * - Ensure concurrency control + * - Handle pending interrupts and call interrupt handlers + * - Wake up the card if required + * - Handle command responses and call response handlers + * - Handle events and call event handlers + * - Execute pending commands + * - Transmit pending data packets + */ +int mwifiex_main_process(struct mwifiex_adapter *adapter) +{ + int ret = 0; + unsigned long flags; + struct sk_buff *skb; + + spin_lock_irqsave(&adapter->main_proc_lock, flags); + + /* Check if already processing */ + if (adapter->mwifiex_processing) { + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); + goto exit_main_proc; + } else { + adapter->mwifiex_processing = true; + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); + } +process_start: + do { + if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) || + (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)) + break; + + /* Handle pending interrupt if any */ + if (adapter->int_status) { + if (adapter->hs_activated) + mwifiex_process_hs_config(adapter); + if (adapter->if_ops.process_int_status) + adapter->if_ops.process_int_status(adapter); + } + + /* Need to wake up the card ? */ + if ((adapter->ps_state == PS_STATE_SLEEP) && + (adapter->pm_wakeup_card_req && + !adapter->pm_wakeup_fw_try) && + (is_command_pending(adapter) || + !mwifiex_wmm_lists_empty(adapter))) { + adapter->pm_wakeup_fw_try = true; + adapter->if_ops.wakeup(adapter); + continue; + } + + if (IS_CARD_RX_RCVD(adapter)) { + adapter->pm_wakeup_fw_try = false; + if (adapter->ps_state == PS_STATE_SLEEP) + adapter->ps_state = PS_STATE_AWAKE; + } else { + /* We have tried to wakeup the card already */ + if (adapter->pm_wakeup_fw_try) + break; + if (adapter->ps_state != PS_STATE_AWAKE || + adapter->tx_lock_flag) + break; + + if ((adapter->scan_processing && + !adapter->scan_delay_cnt) || adapter->data_sent || + mwifiex_wmm_lists_empty(adapter)) { + if (adapter->cmd_sent || adapter->curr_cmd || + (!is_command_pending(adapter))) + break; + } + } + + /* Check Rx data for USB */ + if (adapter->iface_type == MWIFIEX_USB) + while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) + mwifiex_handle_rx_packet(adapter, skb); + + /* Check for Cmd Resp */ + if (adapter->cmd_resp_received) { + adapter->cmd_resp_received = false; + mwifiex_process_cmdresp(adapter); + + /* call mwifiex back when init_fw is done */ + if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) { + adapter->hw_status = MWIFIEX_HW_STATUS_READY; + mwifiex_init_fw_complete(adapter); + } + } + + /* Check for event */ + if (adapter->event_received) { + adapter->event_received = false; + mwifiex_process_event(adapter); + } + + /* Check if we need to confirm Sleep Request + received previously */ + if (adapter->ps_state == PS_STATE_PRE_SLEEP) { + if (!adapter->cmd_sent && !adapter->curr_cmd) + mwifiex_check_ps_cond(adapter); + } + + /* * The ps_state may have been changed during processing of + * Sleep Request event. + */ + if ((adapter->ps_state == PS_STATE_SLEEP) || + (adapter->ps_state == PS_STATE_PRE_SLEEP) || + (adapter->ps_state == PS_STATE_SLEEP_CFM) || + adapter->tx_lock_flag) + continue; + + if (!adapter->cmd_sent && !adapter->curr_cmd) { + if (mwifiex_exec_next_cmd(adapter) == -1) { + ret = -1; + break; + } + } + + if ((!adapter->scan_processing || adapter->scan_delay_cnt) && + !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter)) { + mwifiex_wmm_process_tx(adapter); + if (adapter->hs_activated) { + adapter->is_hs_configured = false; + mwifiex_hs_activated_event + (mwifiex_get_priv + (adapter, MWIFIEX_BSS_ROLE_ANY), + false); + } + } + + if (adapter->delay_null_pkt && !adapter->cmd_sent && + !adapter->curr_cmd && !is_command_pending(adapter) && + mwifiex_wmm_lists_empty(adapter)) { + if (!mwifiex_send_null_packet + (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA), + MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET | + MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) { + adapter->delay_null_pkt = false; + adapter->ps_state = PS_STATE_SLEEP; + } + break; + } + } while (true); + + spin_lock_irqsave(&adapter->main_proc_lock, flags); + if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) { + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); + goto process_start; + } + + adapter->mwifiex_processing = false; + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); + +exit_main_proc: + if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) + mwifiex_shutdown_drv(adapter); + return ret; +} +EXPORT_SYMBOL_GPL(mwifiex_main_process); + +/* + * This function frees the adapter structure. + * + * Additionally, this closes the netlink socket, frees the timers + * and private structures. + */ +static void mwifiex_free_adapter(struct mwifiex_adapter *adapter) +{ + if (!adapter) { + pr_err("%s: adapter is NULL\n", __func__); + return; + } + + mwifiex_unregister(adapter); + pr_debug("info: %s: free adapter\n", __func__); +} + +/* + * This function gets firmware and initializes it. + * + * The main initialization steps followed are - + * - Download the correct firmware to card + * - Issue the init commands to firmware + */ +static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) +{ + int ret; + char fmt[64]; + struct mwifiex_private *priv; + struct mwifiex_adapter *adapter = context; + struct mwifiex_fw_image fw; + + if (!firmware) { + dev_err(adapter->dev, + "Failed to get firmware %s\n", adapter->fw_name); + goto done; + } + + memset(&fw, 0, sizeof(struct mwifiex_fw_image)); + adapter->firmware = firmware; + fw.fw_buf = (u8 *) adapter->firmware->data; + fw.fw_len = adapter->firmware->size; + + if (adapter->if_ops.dnld_fw) + ret = adapter->if_ops.dnld_fw(adapter, &fw); + else + ret = mwifiex_dnld_fw(adapter, &fw); + if (ret == -1) + goto done; + + dev_notice(adapter->dev, "WLAN FW is active\n"); + + adapter->init_wait_q_woken = false; + ret = mwifiex_init_fw(adapter); + if (ret == -1) { + goto done; + } else if (!ret) { + adapter->hw_status = MWIFIEX_HW_STATUS_READY; + goto done; + } + /* Wait for mwifiex_init to complete */ + wait_event_interruptible(adapter->init_wait_q, + adapter->init_wait_q_woken); + if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) + goto done; + + priv = adapter->priv[MWIFIEX_BSS_ROLE_STA]; + if (mwifiex_register_cfg80211(adapter)) { + dev_err(adapter->dev, "cannot register with cfg80211\n"); + goto err_init_fw; + } + + rtnl_lock(); + /* Create station interface by default */ + if (!mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", + NL80211_IFTYPE_STATION, NULL, NULL)) { + dev_err(adapter->dev, "cannot create default STA interface\n"); + goto err_add_intf; + } + rtnl_unlock(); + + mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); + dev_notice(adapter->dev, "driver_version = %s\n", fmt); + goto done; + +err_add_intf: + mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev); + rtnl_unlock(); +err_init_fw: + pr_debug("info: %s: unregister device\n", __func__); + adapter->if_ops.unregister_dev(adapter); +done: + release_firmware(adapter->firmware); + complete(&adapter->fw_load); + return; +} + +/* + * This function initializes the hardware and gets firmware. + */ +static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter) +{ + int ret; + + init_completion(&adapter->fw_load); + ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name, + adapter->dev, GFP_KERNEL, adapter, + mwifiex_fw_dpc); + if (ret < 0) + dev_err(adapter->dev, + "request_firmware_nowait() returned error %d\n", ret); + return ret; +} + +/* + * CFG802.11 network device handler for open. + * + * Starts the data queue. + */ +static int +mwifiex_open(struct net_device *dev) +{ + netif_tx_start_all_queues(dev); + return 0; +} + +/* + * CFG802.11 network device handler for close. + */ +static int +mwifiex_close(struct net_device *dev) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + + if (priv->scan_request) { + dev_dbg(priv->adapter->dev, "aborting scan on ndo_stop\n"); + cfg80211_scan_done(priv->scan_request, 1); + priv->scan_request = NULL; + } + + return 0; +} + +/* + * Add buffer into wmm tx queue and queue work to transmit it. + */ +int mwifiex_queue_tx_pkt(struct mwifiex_private *priv, struct sk_buff *skb) +{ + struct netdev_queue *txq; + int index = mwifiex_1d_to_wmm_queue[skb->priority]; + + if (atomic_inc_return(&priv->wmm_tx_pending[index]) >= MAX_TX_PENDING) { + txq = netdev_get_tx_queue(priv->netdev, index); + if (!netif_tx_queue_stopped(txq)) { + netif_tx_stop_queue(txq); + dev_dbg(priv->adapter->dev, "stop queue: %d\n", index); + } + } + + atomic_inc(&priv->adapter->tx_pending); + mwifiex_wmm_add_buf_txqueue(priv, skb); + + if (priv->adapter->scan_delay_cnt) + atomic_set(&priv->adapter->is_tx_received, true); + + queue_work(priv->adapter->workqueue, &priv->adapter->main_work); + + return 0; +} + +/* + * CFG802.11 network device handler for data transmission. + */ +static int +mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + struct sk_buff *new_skb; + struct mwifiex_txinfo *tx_info; + struct timeval tv; + + dev_dbg(priv->adapter->dev, "data: %lu BSS(%d-%d): Data <= kernel\n", + jiffies, priv->bss_type, priv->bss_num); + + if (priv->adapter->surprise_removed) { + kfree_skb(skb); + priv->stats.tx_dropped++; + return 0; + } + if (!skb->len || (skb->len > ETH_FRAME_LEN)) { + dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len); + kfree_skb(skb); + priv->stats.tx_dropped++; + return 0; + } + if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) { + dev_dbg(priv->adapter->dev, + "data: Tx: insufficient skb headroom %d\n", + skb_headroom(skb)); + /* Insufficient skb headroom - allocate a new skb */ + new_skb = + skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN); + if (unlikely(!new_skb)) { + dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n"); + kfree_skb(skb); + priv->stats.tx_dropped++; + return 0; + } + kfree_skb(skb); + skb = new_skb; + dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n", + skb_headroom(skb)); + } + + tx_info = MWIFIEX_SKB_TXCB(skb); + tx_info->bss_num = priv->bss_num; + tx_info->bss_type = priv->bss_type; + + /* Record the current time the packet was queued; used to + * determine the amount of time the packet was queued in + * the driver before it was sent to the firmware. + * The delay is then sent along with the packet to the + * firmware for aggregate delay calculation for stats and + * MSDU lifetime expiry. + */ + do_gettimeofday(&tv); + skb->tstamp = timeval_to_ktime(tv); + + mwifiex_queue_tx_pkt(priv, skb); + + return 0; +} + +/* + * CFG802.11 network device handler for setting MAC address. + */ +static int +mwifiex_set_mac_address(struct net_device *dev, void *addr) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + struct sockaddr *hw_addr = addr; + int ret; + + memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN); + + /* Send request to firmware */ + ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS, + HostCmd_ACT_GEN_SET, 0, NULL); + + if (!ret) + memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN); + else + dev_err(priv->adapter->dev, + "set mac address failed: ret=%d\n", ret); + + memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); + + return ret; +} + +/* + * CFG802.11 network device handler for setting multicast list. + */ +static void mwifiex_set_multicast_list(struct net_device *dev) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + struct mwifiex_multicast_list mcast_list; + + if (dev->flags & IFF_PROMISC) { + mcast_list.mode = MWIFIEX_PROMISC_MODE; + } else if (dev->flags & IFF_ALLMULTI || + netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) { + mcast_list.mode = MWIFIEX_ALL_MULTI_MODE; + } else { + mcast_list.mode = MWIFIEX_MULTICAST_MODE; + mcast_list.num_multicast_addr = + mwifiex_copy_mcast_addr(&mcast_list, dev); + } + mwifiex_request_set_multicast_list(priv, &mcast_list); +} + +/* + * CFG802.11 network device handler for transmission timeout. + */ +static void +mwifiex_tx_timeout(struct net_device *dev) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + + priv->num_tx_timeout++; + priv->tx_timeout_cnt++; + dev_err(priv->adapter->dev, + "%lu : Tx timeout(#%d), bss_type-num = %d-%d\n", + jiffies, priv->tx_timeout_cnt, priv->bss_type, priv->bss_num); + mwifiex_set_trans_start(dev); + + if (priv->tx_timeout_cnt > TX_TIMEOUT_THRESHOLD && + priv->adapter->if_ops.card_reset) { + dev_err(priv->adapter->dev, + "tx_timeout_cnt exceeds threshold. Triggering card reset!\n"); + priv->adapter->if_ops.card_reset(priv->adapter); + } +} + +/* + * CFG802.11 network device handler for statistics retrieval. + */ +static struct net_device_stats *mwifiex_get_stats(struct net_device *dev) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + + return &priv->stats; +} + +static u16 +mwifiex_netdev_select_wmm_queue(struct net_device *dev, struct sk_buff *skb) +{ + skb->priority = cfg80211_classify8021d(skb); + return mwifiex_1d_to_wmm_queue[skb->priority]; +} + +/* Network device handlers */ +static const struct net_device_ops mwifiex_netdev_ops = { + .ndo_open = mwifiex_open, + .ndo_stop = mwifiex_close, + .ndo_start_xmit = mwifiex_hard_start_xmit, + .ndo_set_mac_address = mwifiex_set_mac_address, + .ndo_tx_timeout = mwifiex_tx_timeout, + .ndo_get_stats = mwifiex_get_stats, + .ndo_set_rx_mode = mwifiex_set_multicast_list, + .ndo_select_queue = mwifiex_netdev_select_wmm_queue, +}; + +/* + * This function initializes the private structure parameters. + * + * The following wait queues are initialized - + * - IOCTL wait queue + * - Command wait queue + * - Statistics wait queue + * + * ...and the following default parameters are set - + * - Current key index : Set to 0 + * - Rate index : Set to auto + * - Media connected : Set to disconnected + * - Adhoc link sensed : Set to false + * - Nick name : Set to null + * - Number of Tx timeout : Set to 0 + * - Device address : Set to current address + * + * In addition, the CFG80211 work queue is also created. + */ +void mwifiex_init_priv_params(struct mwifiex_private *priv, + struct net_device *dev) +{ + netdev_attach_ops(dev, &mwifiex_netdev_ops); + dev->destructor = free_netdev; + /* Initialize private structure */ + priv->current_key_index = 0; + priv->media_connected = false; + memset(&priv->nick_name, 0, sizeof(priv->nick_name)); + memset(priv->mgmt_ie, 0, + sizeof(struct mwifiex_ie) * MAX_MGMT_IE_INDEX); + priv->beacon_idx = MWIFIEX_AUTO_IDX_MASK; + priv->proberesp_idx = MWIFIEX_AUTO_IDX_MASK; + priv->assocresp_idx = MWIFIEX_AUTO_IDX_MASK; + priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK; + priv->num_tx_timeout = 0; + memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); +} + +/* + * This function check if command is pending. + */ +int is_command_pending(struct mwifiex_adapter *adapter) +{ + unsigned long flags; + int is_cmd_pend_q_empty; + + 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); + + return !is_cmd_pend_q_empty; +} + +/* + * This is the main work queue function. + * + * It handles the main process, which in turn handles the complete + * driver operations. + */ +static void mwifiex_main_work_queue(struct work_struct *work) +{ + struct mwifiex_adapter *adapter = + container_of(work, struct mwifiex_adapter, main_work); + + if (adapter->surprise_removed) + return; + mwifiex_main_process(adapter); +} + +/* + * This function cancels all works in the queue and destroys + * the main workqueue. + */ +static void +mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter) +{ + flush_workqueue(adapter->workqueue); + destroy_workqueue(adapter->workqueue); + adapter->workqueue = NULL; +} + +/* + * This function adds the card. + * + * This function follows the following major steps to set up the device - + * - Initialize software. This includes probing the card, registering + * the interface operations table, and allocating/initializing the + * adapter structure + * - Set up the netlink socket + * - Create and start the main work queue + * - Register the device + * - Initialize firmware and hardware + * - Add logical interfaces + */ +int +mwifiex_add_card(void *card, struct semaphore *sem, + struct mwifiex_if_ops *if_ops, u8 iface_type) +{ + struct mwifiex_adapter *adapter; + + if (down_interruptible(sem)) + goto exit_sem_err; + + if (mwifiex_register(card, if_ops, (void **)&adapter)) { + pr_err("%s: software init failed\n", __func__); + goto err_init_sw; + } + + adapter->iface_type = iface_type; + + adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; + adapter->surprise_removed = false; + init_waitqueue_head(&adapter->init_wait_q); + adapter->is_suspended = false; + adapter->hs_activated = false; + init_waitqueue_head(&adapter->hs_activate_wait_q); + adapter->cmd_wait_q_required = false; + init_waitqueue_head(&adapter->cmd_wait_q.wait); + adapter->cmd_wait_q.status = 0; + adapter->scan_wait_q_woken = false; + + adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE"); + if (!adapter->workqueue) + goto err_kmalloc; + + INIT_WORK(&adapter->main_work, mwifiex_main_work_queue); + + /* Register the device. Fill up the private data structure with relevant + information from the card and request for the required IRQ. */ + if (adapter->if_ops.register_dev(adapter)) { + pr_err("%s: failed to register mwifiex device\n", __func__); + goto err_registerdev; + } + + if (mwifiex_init_hw_fw(adapter)) { + pr_err("%s: firmware init failed\n", __func__); + goto err_init_fw; + } + + up(sem); + return 0; + +err_init_fw: + pr_debug("info: %s: unregister device\n", __func__); + if (adapter->if_ops.unregister_dev) + adapter->if_ops.unregister_dev(adapter); +err_registerdev: + adapter->surprise_removed = true; + mwifiex_terminate_workqueue(adapter); +err_kmalloc: + if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) || + (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) { + pr_debug("info: %s: shutdown mwifiex\n", __func__); + adapter->init_wait_q_woken = false; + + if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) + wait_event_interruptible(adapter->init_wait_q, + adapter->init_wait_q_woken); + } + + mwifiex_free_adapter(adapter); + +err_init_sw: + up(sem); + +exit_sem_err: + return -1; +} +EXPORT_SYMBOL_GPL(mwifiex_add_card); + +/* + * This function removes the card. + * + * This function follows the following major steps to remove the device - + * - Stop data traffic + * - Shutdown firmware + * - Remove the logical interfaces + * - Terminate the work queue + * - Unregister the device + * - Free the adapter structure + */ +int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem) +{ + struct mwifiex_private *priv = NULL; + int i; + + if (down_interruptible(sem)) + goto exit_sem_err; + + if (!adapter) + goto exit_remove; + + adapter->surprise_removed = true; + + /* Stop data */ + for (i = 0; i < adapter->priv_num; i++) { + priv = adapter->priv[i]; + if (priv && priv->netdev) { + mwifiex_stop_net_dev_queue(priv->netdev, adapter); + if (netif_carrier_ok(priv->netdev)) + netif_carrier_off(priv->netdev); + } + } + + dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n"); + adapter->init_wait_q_woken = false; + + if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS) + wait_event_interruptible(adapter->init_wait_q, + adapter->init_wait_q_woken); + dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n"); + if (atomic_read(&adapter->rx_pending) || + atomic_read(&adapter->tx_pending) || + atomic_read(&adapter->cmd_pending)) { + dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, " + "cmd_pending=%d\n", + atomic_read(&adapter->rx_pending), + atomic_read(&adapter->tx_pending), + atomic_read(&adapter->cmd_pending)); + } + + for (i = 0; i < adapter->priv_num; i++) { + priv = adapter->priv[i]; + + if (!priv) + continue; + + rtnl_lock(); + if (priv->wdev && priv->netdev) + mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev); + rtnl_unlock(); + } + + priv = adapter->priv[0]; + if (!priv || !priv->wdev) + goto exit_remove; + + wiphy_unregister(priv->wdev->wiphy); + wiphy_free(priv->wdev->wiphy); + + for (i = 0; i < adapter->priv_num; i++) { + priv = adapter->priv[i]; + if (priv) + kfree(priv->wdev); + } + + mwifiex_terminate_workqueue(adapter); + + /* Unregister device */ + dev_dbg(adapter->dev, "info: unregister device\n"); + if (adapter->if_ops.unregister_dev) + adapter->if_ops.unregister_dev(adapter); + /* Free adapter structure */ + dev_dbg(adapter->dev, "info: free adapter\n"); + mwifiex_free_adapter(adapter); + +exit_remove: + up(sem); +exit_sem_err: + return 0; +} +EXPORT_SYMBOL_GPL(mwifiex_remove_card); + +/* + * This function initializes the module. + * + * The debug FS is also initialized if configured. + */ +static int +mwifiex_init_module(void) +{ +#ifdef CONFIG_DEBUG_FS + mwifiex_debugfs_init(); +#endif + return 0; +} + +/* + * This function cleans up the module. + * + * The debug FS is removed if available. + */ +static void +mwifiex_cleanup_module(void) +{ +#ifdef CONFIG_DEBUG_FS + mwifiex_debugfs_remove(); +#endif +} + +module_init(mwifiex_init_module); +module_exit(mwifiex_cleanup_module); + +MODULE_AUTHOR("Marvell International Ltd."); +MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL v2"); |