| /* |
| * 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); |
| |
| if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter)) |
| goto process_start; |
| |
| spin_lock_irqsave(&adapter->main_proc_lock, flags); |
| 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; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* Create AP interface by default */ |
| if (!mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", |
| NL80211_IFTYPE_AP, NULL, NULL)) { |
| dev_err(adapter->dev, "cannot create default AP 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; |
| } |
| |
| /* |
| * This function fills a driver buffer. |
| * |
| * The function associates a given SKB with the provided driver buffer |
| * and also updates some of the SKB parameters, including IP header, |
| * priority and timestamp. |
| */ |
| static void |
| mwifiex_fill_buffer(struct sk_buff *skb) |
| { |
| struct ethhdr *eth; |
| struct iphdr *iph; |
| struct timeval tv; |
| u8 tid = 0; |
| |
| eth = (struct ethhdr *) skb->data; |
| switch (eth->h_proto) { |
| case __constant_htons(ETH_P_IP): |
| iph = ip_hdr(skb); |
| tid = IPTOS_PREC(iph->tos); |
| pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n", |
| eth->h_proto, tid, skb->priority); |
| break; |
| case __constant_htons(ETH_P_ARP): |
| pr_debug("data: ARP packet: %04x\n", eth->h_proto); |
| default: |
| break; |
| } |
| /* Offset for TOS field in the IP header */ |
| #define IPTOS_OFFSET 5 |
| tid = (tid >> IPTOS_OFFSET); |
| skb->priority = tid; |
| /* 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); |
| } |
| |
| /* |
| * 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) |
| { |
| 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) |
| { |
| mwifiex_wmm_add_buf_txqueue(priv, skb); |
| atomic_inc(&priv->adapter->tx_pending); |
| |
| if (priv->adapter->scan_delay_cnt) |
| atomic_set(&priv->adapter->is_tx_received, true); |
| |
| if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) { |
| mwifiex_set_trans_start(priv->netdev); |
| mwifiex_stop_net_dev_queue(priv->netdev, priv->adapter); |
| } |
| |
| 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; |
| |
| 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; |
| mwifiex_fill_buffer(skb); |
| |
| 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; |
| if (netdev_mc_count(dev)) |
| 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); |
| |
| dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_type-num = %d-%d\n", |
| jiffies, priv->bss_type, priv->bss_num); |
| mwifiex_set_trans_start(dev); |
| priv->num_tx_timeout++; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| /* 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, |
| }; |
| |
| /* |
| * 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; |
| /* 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) { |
| if (!netif_queue_stopped(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"); |