/* * 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) "; static char *cal_data_cfg; module_param(cal_data_cfg, charp, 0); static void scan_delay_timer_fn(unsigned long data) { struct mwifiex_private *priv = (struct mwifiex_private *)data; struct mwifiex_adapter *adapter = priv->adapter; struct cmd_ctrl_node *cmd_node, *tmp_node; unsigned long flags; if (adapter->surprise_removed) return; if (adapter->scan_delay_cnt == MWIFIEX_MAX_SCAN_DELAY_CNT) { /* * Abort scan operation by cancelling all pending scan * commands */ 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); mwifiex_insert_cmd_to_free_q(adapter, cmd_node); } spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); adapter->scan_processing = false; adapter->scan_delay_cnt = 0; adapter->empty_tx_q_cnt = 0; spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); if (priv->scan_request) { dev_dbg(adapter->dev, "info: aborting scan\n"); cfg80211_scan_done(priv->scan_request, 1); priv->scan_request = NULL; } else { priv->scan_aborting = false; dev_dbg(adapter->dev, "info: scan already aborted\n"); } goto done; } if (!atomic_read(&priv->adapter->is_tx_received)) { adapter->empty_tx_q_cnt++; if (adapter->empty_tx_q_cnt == MWIFIEX_MAX_EMPTY_TX_Q_CNT) { /* * No Tx traffic for 200msec. Get scan command from * scan pending queue and put to cmd pending queue to * resume scan operation */ adapter->scan_delay_cnt = 0; adapter->empty_tx_q_cnt = 0; spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); cmd_node = list_first_entry(&adapter->scan_pending_q, struct cmd_ctrl_node, list); list_del(&cmd_node->list); spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true); queue_work(adapter->workqueue, &adapter->main_work); goto done; } } else { adapter->empty_tx_q_cnt = 0; } /* Delay scan operation further by 20msec */ mod_timer(&priv->scan_delay_timer, jiffies + msecs_to_jiffies(MWIFIEX_SCAN_DELAY_MSEC)); adapter->scan_delay_cnt++; done: if (atomic_read(&priv->adapter->is_tx_received)) atomic_set(&priv->adapter->is_tx_received, false); return; } /* * 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++; setup_timer(&adapter->priv[i]->scan_delay_timer, scan_delay_timer_fn, (unsigned long)adapter->priv[i]); } 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; if (adapter->if_ops.cleanup_if) adapter->if_ops.cleanup_if(adapter); del_timer_sync(&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]); del_timer_sync(&adapter->priv[i]->scan_delay_timer); 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 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 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; struct semaphore *sem = adapter->card_sem; bool init_failed = false; struct wireless_dev *wdev; if (!firmware) { dev_err(adapter->dev, "Failed to get firmware %s\n", adapter->fw_name); goto err_dnld_fw; } 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 err_dnld_fw; dev_notice(adapter->dev, "WLAN FW is active\n"); if (cal_data_cfg) { if ((request_firmware(&adapter->cal_data, cal_data_cfg, adapter->dev)) < 0) dev_err(adapter->dev, "Cal data request_firmware() failed\n"); } /* enable host interrupt after fw dnld is successful */ if (adapter->if_ops.enable_int) { if (adapter->if_ops.enable_int(adapter)) goto err_dnld_fw; } adapter->init_wait_q_woken = false; ret = mwifiex_init_fw(adapter); if (ret == -1) { goto err_init_fw; } 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 err_init_fw; 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 */ wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NL80211_IFTYPE_STATION, NULL, NULL); if (IS_ERR(wdev)) { dev_err(adapter->dev, "cannot create default STA interface\n"); rtnl_unlock(); 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: wiphy_unregister(adapter->wiphy); wiphy_free(adapter->wiphy); err_init_fw: if (adapter->if_ops.disable_int) adapter->if_ops.disable_int(adapter); err_dnld_fw: pr_debug("info: %s: unregister device\n", __func__); if (adapter->if_ops.unregister_dev) adapter->if_ops.unregister_dev(adapter); 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); } adapter->surprise_removed = true; mwifiex_terminate_workqueue(adapter); init_failed = true; done: if (adapter->cal_data) { release_firmware(adapter->cal_data); adapter->cal_data = NULL; } if (adapter->firmware) { release_firmware(adapter->firmware); adapter->firmware = NULL; } complete(&adapter->fw_load); if (init_failed) mwifiex_free_adapter(adapter); up(sem); 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; priv->scan_aborting = true; } 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; tx_info->pkt_len = skb->len; /* 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(priv, HostCmd_CMD_802_11_MAC_ADDRESS, HostCmd_ACT_GEN_SET, 0, NULL, true); 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, void *accel_priv) { skb->priority = cfg80211_classify8021d(skb, NULL); 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) { dev->netdev_ops = &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 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->card_sem = sem; 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); init_waitqueue_head(&adapter->cmd_wait_q.wait); adapter->cmd_wait_q.status = 0; adapter->scan_wait_q_woken = false; adapter->workqueue = alloc_workqueue("MWIFIEX_WORK_QUEUE", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 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. */ 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; } 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); 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); } err_registerdev: adapter->surprise_removed = true; mwifiex_terminate_workqueue(adapter); err_kmalloc: 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; /* We can no longer handle interrupts once we start doing the teardown * below. */ if (adapter->if_ops.disable_int) adapter->if_ops.disable_int(adapter); 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(); } wiphy_unregister(adapter->wiphy); wiphy_free(adapter->wiphy); 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");