/* * Marvell Wireless LAN device driver: major functions * * Copyright (C) 2011-2014, Marvell International Ltd. * * This software file (the "File") is distributed by Marvell International * Ltd. under the terms of the GNU General Public License Version 2, June 1991 * (the "License"). You may use, redistribute and/or modify this File in * accordance with the terms and conditions of the License, a copy of which * is available by writing to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. * * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE * ARE EXPRESSLY DISCLAIMED. The License provides additional details about * this warranty disclaimer. */ #include "main.h" #include "wmm.h" #include "cfg80211.h" #include "11n.h" #define VERSION "1.0" static unsigned int debug_mask = MWIFIEX_DEFAULT_DEBUG_MASK; module_param(debug_mask, uint, 0); MODULE_PARM_DESC(debug_mask, "bitmap for debug flags"); const char driver_version[] = "mwifiex " VERSION " (%s) "; static char *cal_data_cfg; module_param(cal_data_cfg, charp, 0); static unsigned short driver_mode; module_param(driver_mode, ushort, 0); MODULE_PARM_DESC(driver_mode, "station=0x1(default), ap-sta=0x3, station-p2p=0x5, ap-sta-p2p=0x7"); /* * 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)); adapter->debug_mask = debug_mask; /* 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); setup_timer(&adapter->cmd_timer, mwifiex_cmd_timeout_func, (unsigned long)adapter); return 0; error: mwifiex_dbg(adapter, ERROR, "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]); kfree(adapter->priv[i]); } } vfree(adapter->chan_stats); kfree(adapter); return 0; } void mwifiex_queue_main_work(struct mwifiex_adapter *adapter) { unsigned long flags; spin_lock_irqsave(&adapter->main_proc_lock, flags); if (adapter->mwifiex_processing) { adapter->more_task_flag = true; spin_unlock_irqrestore(&adapter->main_proc_lock, flags); } else { spin_unlock_irqrestore(&adapter->main_proc_lock, flags); queue_work(adapter->workqueue, &adapter->main_work); } } EXPORT_SYMBOL_GPL(mwifiex_queue_main_work); static void mwifiex_queue_rx_work(struct mwifiex_adapter *adapter) { unsigned long flags; spin_lock_irqsave(&adapter->rx_proc_lock, flags); if (adapter->rx_processing) { spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); } else { spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); queue_work(adapter->rx_workqueue, &adapter->rx_work); } } static int mwifiex_process_rx(struct mwifiex_adapter *adapter) { unsigned long flags; struct sk_buff *skb; struct mwifiex_rxinfo *rx_info; spin_lock_irqsave(&adapter->rx_proc_lock, flags); if (adapter->rx_processing || adapter->rx_locked) { spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); goto exit_rx_proc; } else { adapter->rx_processing = true; spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); } /* Check for Rx data */ while ((skb = skb_dequeue(&adapter->rx_data_q))) { atomic_dec(&adapter->rx_pending); if ((adapter->delay_main_work || adapter->iface_type == MWIFIEX_USB) && (atomic_read(&adapter->rx_pending) < LOW_RX_PENDING)) { if (adapter->if_ops.submit_rem_rx_urbs) adapter->if_ops.submit_rem_rx_urbs(adapter); adapter->delay_main_work = false; mwifiex_queue_main_work(adapter); } rx_info = MWIFIEX_SKB_RXCB(skb); if (rx_info->buf_type == MWIFIEX_TYPE_AGGR_DATA) { if (adapter->if_ops.deaggr_pkt) adapter->if_ops.deaggr_pkt(adapter, skb); dev_kfree_skb_any(skb); } else { mwifiex_handle_rx_packet(adapter, skb); } } spin_lock_irqsave(&adapter->rx_proc_lock, flags); adapter->rx_processing = false; spin_unlock_irqrestore(&adapter->rx_proc_lock, flags); exit_rx_proc: 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; spin_lock_irqsave(&adapter->main_proc_lock, flags); /* Check if already processing */ if (adapter->mwifiex_processing || adapter->main_locked) { adapter->more_task_flag = true; 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; /* For non-USB interfaces, If we process interrupts first, it * would increase RX pending even further. Avoid this by * checking if rx_pending has crossed high threshold and * schedule rx work queue and then process interrupts. * For USB interface, there are no interrupts. We already have * HIGH_RX_PENDING check in usb.c */ if (atomic_read(&adapter->rx_pending) >= HIGH_RX_PENDING && adapter->iface_type != MWIFIEX_USB) { adapter->delay_main_work = true; mwifiex_queue_rx_work(adapter); 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); } if (adapter->rx_work_enabled && adapter->data_received) mwifiex_queue_rx_work(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) || !skb_queue_empty(&adapter->tx_data_q) || !mwifiex_bypass_txlist_empty(adapter) || !mwifiex_wmm_lists_empty(adapter))) { adapter->pm_wakeup_fw_try = true; mod_timer(&adapter->wakeup_timer, jiffies + (HZ*3)); adapter->if_ops.wakeup(adapter); continue; } if (IS_CARD_RX_RCVD(adapter)) { adapter->data_received = false; adapter->pm_wakeup_fw_try = false; del_timer(&adapter->wakeup_timer); 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_chan_gap_enabled && adapter->scan_processing) || adapter->data_sent || mwifiex_is_tdls_chan_switching (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA)) || (mwifiex_wmm_lists_empty(adapter) && mwifiex_bypass_txlist_empty(adapter) && skb_queue_empty(&adapter->tx_data_q))) { if (adapter->cmd_sent || adapter->curr_cmd || !mwifiex_is_send_cmd_allowed (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA)) || (!is_command_pending(adapter))) break; } } /* Check for event */ if (adapter->event_received) { adapter->event_received = false; mwifiex_process_event(adapter); } /* 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 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 && mwifiex_is_send_cmd_allowed (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { if (mwifiex_exec_next_cmd(adapter) == -1) { ret = -1; break; } } if ((adapter->scan_chan_gap_enabled || !adapter->scan_processing) && !adapter->data_sent && !skb_queue_empty(&adapter->tx_data_q)) { mwifiex_process_tx_queue(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->scan_chan_gap_enabled || !adapter->scan_processing) && !adapter->data_sent && !mwifiex_bypass_txlist_empty(adapter) && !mwifiex_is_tdls_chan_switching (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { mwifiex_process_bypass_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->scan_chan_gap_enabled || !adapter->scan_processing) && !adapter->data_sent && !mwifiex_wmm_lists_empty(adapter) && !mwifiex_is_tdls_chan_switching (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA))) { 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) && mwifiex_bypass_txlist_empty(adapter) && skb_queue_empty(&adapter->tx_data_q))) { 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->more_task_flag) { adapter->more_task_flag = false; 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; if (adapter->rx_workqueue) { flush_workqueue(adapter->rx_workqueue); destroy_workqueue(adapter->rx_workqueue); adapter->rx_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) { mwifiex_dbg(adapter, ERROR, "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; mwifiex_dbg(adapter, MSG, "WLAN FW is active\n"); if (cal_data_cfg) { if ((request_firmware(&adapter->cal_data, cal_data_cfg, adapter->dev)) < 0) mwifiex_dbg(adapter, ERROR, "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)) { mwifiex_dbg(adapter, ERROR, "cannot register with cfg80211\n"); goto err_init_fw; } if (mwifiex_init_channel_scan_gap(adapter)) { mwifiex_dbg(adapter, ERROR, "could not init channel stats table\n"); goto err_init_fw; } if (driver_mode) { driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK; driver_mode |= MWIFIEX_DRIVER_MODE_STA; } rtnl_lock(); /* Create station interface by default */ wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM, NL80211_IFTYPE_STATION, NULL, NULL); if (IS_ERR(wdev)) { mwifiex_dbg(adapter, ERROR, "cannot create default STA interface\n"); rtnl_unlock(); goto err_add_intf; } if (driver_mode & MWIFIEX_DRIVER_MODE_UAP) { wdev = mwifiex_add_virtual_intf(adapter->wiphy, "uap%d", NET_NAME_ENUM, NL80211_IFTYPE_AP, NULL, NULL); if (IS_ERR(wdev)) { mwifiex_dbg(adapter, ERROR, "cannot create AP interface\n"); rtnl_unlock(); goto err_add_intf; } } if (driver_mode & MWIFIEX_DRIVER_MODE_P2P) { wdev = mwifiex_add_virtual_intf(adapter->wiphy, "p2p%d", NET_NAME_ENUM, NL80211_IFTYPE_P2P_CLIENT, NULL, NULL); if (IS_ERR(wdev)) { mwifiex_dbg(adapter, ERROR, "cannot create p2p client interface\n"); rtnl_unlock(); goto err_add_intf; } } rtnl_unlock(); mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); mwifiex_dbg(adapter, MSG, "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: mwifiex_dbg(adapter, ERROR, "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_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; } 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; ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name, adapter->dev, GFP_KERNEL, adapter, mwifiex_fw_dpc); if (ret < 0) mwifiex_dbg(adapter, ERROR, "request_firmware_nowait 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_carrier_off(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) { mwifiex_dbg(priv->adapter, INFO, "aborting scan on ndo_stop\n"); cfg80211_scan_done(priv->scan_request, 1); priv->scan_request = NULL; priv->scan_aborting = true; } return 0; } static bool mwifiex_bypass_tx_queue(struct mwifiex_private *priv, struct sk_buff *skb) { struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; if (ntohs(eth_hdr->h_proto) == ETH_P_PAE || mwifiex_is_skb_mgmt_frame(skb) || (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) { mwifiex_dbg(priv->adapter, DATA, "bypass txqueue; eth type %#x, mgmt %d\n", ntohs(eth_hdr->h_proto), mwifiex_is_skb_mgmt_frame(skb)); return true; } return false; } /* * 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); mwifiex_dbg(priv->adapter, DATA, "stop queue: %d\n", index); } } if (mwifiex_bypass_tx_queue(priv, skb)) { atomic_inc(&priv->adapter->tx_pending); atomic_inc(&priv->adapter->bypass_tx_pending); mwifiex_wmm_add_buf_bypass_txqueue(priv, skb); } else { atomic_inc(&priv->adapter->tx_pending); mwifiex_wmm_add_buf_txqueue(priv, skb); } mwifiex_queue_main_work(priv->adapter); return 0; } struct sk_buff * mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv, struct sk_buff *skb, u8 flag, u64 *cookie) { struct sk_buff *orig_skb = skb; struct mwifiex_txinfo *tx_info, *orig_tx_info; skb = skb_clone(skb, GFP_ATOMIC); if (skb) { unsigned long flags; int id; spin_lock_irqsave(&priv->ack_status_lock, flags); id = idr_alloc(&priv->ack_status_frames, orig_skb, 1, 0xff, GFP_ATOMIC); spin_unlock_irqrestore(&priv->ack_status_lock, flags); if (id >= 0) { tx_info = MWIFIEX_SKB_TXCB(skb); tx_info->ack_frame_id = id; tx_info->flags |= flag; orig_tx_info = MWIFIEX_SKB_TXCB(orig_skb); orig_tx_info->ack_frame_id = id; orig_tx_info->flags |= flag; if (flag == MWIFIEX_BUF_FLAG_ACTION_TX_STATUS && cookie) orig_tx_info->cookie = *cookie; } else if (skb_shared(skb)) { kfree_skb(orig_skb); } else { kfree_skb(skb); skb = orig_skb; } } else { /* couldn't clone -- lose tx status ... */ skb = orig_skb; } return skb; } /* * 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; bool multicast; mwifiex_dbg(priv->adapter, DATA, "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)) { mwifiex_dbg(priv->adapter, ERROR, "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) { mwifiex_dbg(priv->adapter, DATA, "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)) { mwifiex_dbg(priv->adapter, ERROR, "Tx: cannot alloca new_skb\n"); kfree_skb(skb); priv->stats.tx_dropped++; return 0; } kfree_skb(skb); skb = new_skb; mwifiex_dbg(priv->adapter, INFO, "info: new skb headroomd %d\n", skb_headroom(skb)); } tx_info = MWIFIEX_SKB_TXCB(skb); memset(tx_info, 0, sizeof(*tx_info)); tx_info->bss_num = priv->bss_num; tx_info->bss_type = priv->bss_type; tx_info->pkt_len = skb->len; multicast = is_multicast_ether_addr(skb->data); if (unlikely(!multicast && skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS && priv->adapter->fw_api_ver == MWIFIEX_FW_V15)) skb = mwifiex_clone_skb_for_tx_status(priv, skb, MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS, NULL); /* 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. */ __net_timestamp(skb); if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) && priv->bss_type == MWIFIEX_BSS_TYPE_STA && !ether_addr_equal_unaligned(priv->cfg_bssid, skb->data)) { if (priv->adapter->auto_tdls && priv->check_tdls_tx) mwifiex_tdls_check_tx(priv, 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(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 mwifiex_dbg(priv->adapter, ERROR, "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++; mwifiex_dbg(priv->adapter, ERROR, "%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) { mwifiex_dbg(priv->adapter, ERROR, "tx_timeout_cnt exceeds threshold.\t" "Triggering card reset!\n"); priv->adapter->if_ops.card_reset(priv->adapter); } } void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter) { void *p; char drv_version[64]; struct usb_card_rec *cardp; struct sdio_mmc_card *sdio_card; struct mwifiex_private *priv; int i, idx; struct netdev_queue *txq; struct mwifiex_debug_info *debug_info; if (adapter->drv_info_dump) { vfree(adapter->drv_info_dump); adapter->drv_info_dump = NULL; adapter->drv_info_size = 0; } mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n"); adapter->drv_info_dump = vzalloc(MWIFIEX_DRV_INFO_SIZE_MAX); if (!adapter->drv_info_dump) return; p = (char *)(adapter->drv_info_dump); p += sprintf(p, "driver_name = " "\"mwifiex\"\n"); mwifiex_drv_get_driver_version(adapter, drv_version, sizeof(drv_version) - 1); p += sprintf(p, "driver_version = %s\n", drv_version); if (adapter->iface_type == MWIFIEX_USB) { cardp = (struct usb_card_rec *)adapter->card; p += sprintf(p, "tx_cmd_urb_pending = %d\n", atomic_read(&cardp->tx_cmd_urb_pending)); p += sprintf(p, "tx_data_urb_pending = %d\n", atomic_read(&cardp->tx_data_urb_pending)); p += sprintf(p, "rx_cmd_urb_pending = %d\n", atomic_read(&cardp->rx_cmd_urb_pending)); p += sprintf(p, "rx_data_urb_pending = %d\n", atomic_read(&cardp->rx_data_urb_pending)); } p += sprintf(p, "tx_pending = %d\n", atomic_read(&adapter->tx_pending)); p += sprintf(p, "rx_pending = %d\n", atomic_read(&adapter->rx_pending)); if (adapter->iface_type == MWIFIEX_SDIO) { sdio_card = (struct sdio_mmc_card *)adapter->card; p += sprintf(p, "\nmp_rd_bitmap=0x%x curr_rd_port=0x%x\n", sdio_card->mp_rd_bitmap, sdio_card->curr_rd_port); p += sprintf(p, "mp_wr_bitmap=0x%x curr_wr_port=0x%x\n", sdio_card->mp_wr_bitmap, sdio_card->curr_wr_port); } for (i = 0; i < adapter->priv_num; i++) { if (!adapter->priv[i] || !adapter->priv[i]->netdev) continue; priv = adapter->priv[i]; p += sprintf(p, "\n[interface : \"%s\"]\n", priv->netdev->name); p += sprintf(p, "wmm_tx_pending[0] = %d\n", atomic_read(&priv->wmm_tx_pending[0])); p += sprintf(p, "wmm_tx_pending[1] = %d\n", atomic_read(&priv->wmm_tx_pending[1])); p += sprintf(p, "wmm_tx_pending[2] = %d\n", atomic_read(&priv->wmm_tx_pending[2])); p += sprintf(p, "wmm_tx_pending[3] = %d\n", atomic_read(&priv->wmm_tx_pending[3])); p += sprintf(p, "media_state=\"%s\"\n", !priv->media_connected ? "Disconnected" : "Connected"); p += sprintf(p, "carrier %s\n", (netif_carrier_ok(priv->netdev) ? "on" : "off")); for (idx = 0; idx < priv->netdev->num_tx_queues; idx++) { txq = netdev_get_tx_queue(priv->netdev, idx); p += sprintf(p, "tx queue %d:%s ", idx, netif_tx_queue_stopped(txq) ? "stopped" : "started"); } p += sprintf(p, "\n%s: num_tx_timeout = %d\n", priv->netdev->name, priv->num_tx_timeout); } if (adapter->iface_type == MWIFIEX_SDIO) { p += sprintf(p, "\n=== SDIO register dump===\n"); if (adapter->if_ops.reg_dump) p += adapter->if_ops.reg_dump(adapter, p); } p += sprintf(p, "\n=== more debug information\n"); debug_info = kzalloc(sizeof(*debug_info), GFP_KERNEL); if (debug_info) { for (i = 0; i < adapter->priv_num; i++) { if (!adapter->priv[i] || !adapter->priv[i]->netdev) continue; priv = adapter->priv[i]; mwifiex_get_debug_info(priv, debug_info); p += mwifiex_debug_info_to_buffer(priv, p, debug_info); break; } kfree(debug_info); } adapter->drv_info_size = p - adapter->drv_info_dump; mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n"); } EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump); void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter) { u8 idx, *dump_data, *fw_dump_ptr; u32 dump_len; dump_len = (strlen("========Start dump driverinfo========\n") + adapter->drv_info_size + strlen("\n========End dump========\n")); for (idx = 0; idx < adapter->num_mem_types; idx++) { struct memory_type_mapping *entry = &adapter->mem_type_mapping_tbl[idx]; if (entry->mem_ptr) { dump_len += (strlen("========Start dump ") + strlen(entry->mem_name) + strlen("========\n") + (entry->mem_size + 1) + strlen("\n========End dump========\n")); } } dump_data = vzalloc(dump_len + 1); if (!dump_data) goto done; fw_dump_ptr = dump_data; /* Dump all the memory data into single file, a userspace script will * be used to split all the memory data to multiple files */ mwifiex_dbg(adapter, MSG, "== mwifiex dump information to /sys/class/devcoredump start"); strcpy(fw_dump_ptr, "========Start dump driverinfo========\n"); fw_dump_ptr += strlen("========Start dump driverinfo========\n"); memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size); fw_dump_ptr += adapter->drv_info_size; strcpy(fw_dump_ptr, "\n========End dump========\n"); fw_dump_ptr += strlen("\n========End dump========\n"); for (idx = 0; idx < adapter->num_mem_types; idx++) { struct memory_type_mapping *entry = &adapter->mem_type_mapping_tbl[idx]; if (entry->mem_ptr) { strcpy(fw_dump_ptr, "========Start dump "); fw_dump_ptr += strlen("========Start dump "); strcpy(fw_dump_ptr, entry->mem_name); fw_dump_ptr += strlen(entry->mem_name); strcpy(fw_dump_ptr, "========\n"); fw_dump_ptr += strlen("========\n"); memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size); fw_dump_ptr += entry->mem_size; strcpy(fw_dump_ptr, "\n========End dump========\n"); fw_dump_ptr += strlen("\n========End dump========\n"); } } /* device dump data will be free in device coredump release function * after 5 min */ dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL); mwifiex_dbg(adapter, MSG, "== mwifiex dump information to /sys/class/devcoredump end"); done: for (idx = 0; idx < adapter->num_mem_types; idx++) { struct memory_type_mapping *entry = &adapter->mem_type_mapping_tbl[idx]; if (entry->mem_ptr) { vfree(entry->mem_ptr); entry->mem_ptr = NULL; } entry->mem_size = 0; } if (adapter->drv_info_dump) { vfree(adapter->drv_info_dump); adapter->drv_info_dump = NULL; adapter->drv_info_size = 0; } } EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump); /* * 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, select_queue_fallback_t fallback) { 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 * - Rx histogram statistc : Set to 0 * * 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->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->gen_idx = MWIFIEX_AUTO_IDX_MASK; priv->num_tx_timeout = 0; ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr); memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN); if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA || GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) { priv->hist_data = kmalloc(sizeof(*priv->hist_data), GFP_KERNEL); if (priv->hist_data) mwifiex_hist_data_reset(priv); } } /* * 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 RX work queue function. * * It handles the RX operations. */ static void mwifiex_rx_work_queue(struct work_struct *work) { struct mwifiex_adapter *adapter = container_of(work, struct mwifiex_adapter, rx_work); if (adapter->surprise_removed) return; mwifiex_process_rx(adapter); } /* * 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; if ((num_possible_cpus() > 1) || adapter->iface_type == MWIFIEX_USB) { adapter->rx_work_enabled = true; pr_notice("rx work enabled, cpus %d\n", num_possible_cpus()); } 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); if (adapter->rx_work_enabled) { adapter->rx_workqueue = alloc_workqueue("MWIFIEX_RX_WORK_QUEUE", WQ_HIGHPRI | WQ_MEM_RECLAIM | WQ_UNBOUND, 1); if (!adapter->rx_workqueue) goto err_kmalloc; INIT_WORK(&adapter->rx_work, mwifiex_rx_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_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; mwifiex_terminate_workqueue(adapter); /* 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); } } mwifiex_dbg(adapter, CMD, "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); mwifiex_dbg(adapter, CMD, "cmd: mwifiex_shutdown_drv done\n"); if (atomic_read(&adapter->rx_pending) || atomic_read(&adapter->tx_pending) || atomic_read(&adapter->cmd_pending)) { mwifiex_dbg(adapter, ERROR, "rx_pending=%d, tx_pending=%d,\t" "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->netdev && priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED) mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev); rtnl_unlock(); } wiphy_unregister(adapter->wiphy); wiphy_free(adapter->wiphy); /* Unregister device */ mwifiex_dbg(adapter, INFO, "info: unregister device\n"); if (adapter->if_ops.unregister_dev) adapter->if_ops.unregister_dev(adapter); /* Free adapter structure */ mwifiex_dbg(adapter, INFO, "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");