diff options
Diffstat (limited to 'drivers/net/wireless/marvell/mwifiex/main.c')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/main.c | 1851 |
1 files changed, 1851 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c new file mode 100644 index 000000000..da2e6557e --- /dev/null +++ b/drivers/net/wireless/marvell/mwifiex/main.c @@ -0,0 +1,1851 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * NXP Wireless LAN device driver: major functions + * + * Copyright 2011-2020 NXP + */ + +#include <linux/suspend.h> + +#include "main.h" +#include "wmm.h" +#include "cfg80211.h" +#include "11n.h" + +#define VERSION "1.0" +#define MFG_FIRMWARE "mwifiex_mfg.bin" + +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"); + +bool mfg_mode; +module_param(mfg_mode, bool, 0); +MODULE_PARM_DESC(mfg_mode, "manufacturing mode enable:1, disable:0"); + +bool aggr_ctrl; +module_param(aggr_ctrl, bool, 0000); +MODULE_PARM_DESC(aggr_ctrl, "usb tx aggregation enable:1, disable:0"); + +const u16 mwifiex_1d_to_wmm_queue[8] = { 1, 0, 0, 1, 2, 2, 3, 3 }; + +/* + * 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 device *dev, + 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->dev = dev; + 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); + + timer_setup(&adapter->cmd_timer, mwifiex_cmd_timeout_func, 0); + + 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]); + } + } + + if (adapter->nd_info) { + for (i = 0 ; i < adapter->nd_info->n_matches ; i++) + kfree(adapter->nd_info->matches[i]); + kfree(adapter->nd_info); + adapter->nd_info = NULL; + } + + kfree(adapter->regd); + + 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) +{ + spin_lock_bh(&adapter->rx_proc_lock); + if (adapter->rx_processing) { + spin_unlock_bh(&adapter->rx_proc_lock); + } else { + spin_unlock_bh(&adapter->rx_proc_lock); + queue_work(adapter->rx_workqueue, &adapter->rx_work); + } +} + +static int mwifiex_process_rx(struct mwifiex_adapter *adapter) +{ + struct sk_buff *skb; + struct mwifiex_rxinfo *rx_info; + + spin_lock_bh(&adapter->rx_proc_lock); + if (adapter->rx_processing || adapter->rx_locked) { + spin_unlock_bh(&adapter->rx_proc_lock); + goto exit_rx_proc; + } else { + adapter->rx_processing = true; + spin_unlock_bh(&adapter->rx_proc_lock); + } + + /* 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_bh(&adapter->rx_proc_lock); + adapter->rx_processing = false; + spin_unlock_bh(&adapter->rx_proc_lock); + +exit_rx_proc: + return 0; +} + +static void maybe_quirk_fw_disable_ds(struct mwifiex_adapter *adapter) +{ + struct mwifiex_private *priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA); + struct mwifiex_ver_ext ver_ext; + + if (test_and_set_bit(MWIFIEX_IS_REQUESTING_FW_VEREXT, &adapter->work_flags)) + return; + + memset(&ver_ext, 0, sizeof(ver_ext)); + ver_ext.version_str_sel = 1; + if (mwifiex_send_cmd(priv, HostCmd_CMD_VERSION_EXT, + HostCmd_ACT_GEN_GET, 0, &ver_ext, false)) { + mwifiex_dbg(priv->adapter, MSG, + "Checking hardware revision failed.\n"); + } +} + +/* + * 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); + return 0; + } else { + adapter->mwifiex_processing = true; + spin_unlock_irqrestore(&adapter->main_proc_lock, flags); + } +process_start: + do { + if (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_PRE_SLEEP) + mwifiex_check_ps_cond(adapter); + + if (adapter->ps_state != PS_STATE_AWAKE) + break; + if (adapter->tx_lock_flag) { + if (adapter->iface_type == MWIFIEX_USB) { + if (!adapter->usb_mc_setup) + break; + } else + 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); + maybe_quirk_fw_disable_ds(adapter); + } + } + + /* Check if we need to confirm Sleep Request + received previously */ + if (adapter->ps_state == PS_STATE_PRE_SLEEP) + 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)) { + continue; + } + + if (adapter->tx_lock_flag) { + if (adapter->iface_type == MWIFIEX_USB) { + if (!adapter->usb_mc_setup) + continue; + } else + 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 USB Multi channel setup ongoing, + * wait for ready to tx data. + */ + if (adapter->iface_type == MWIFIEX_USB && + adapter->usb_mc_setup) + continue; + + if ((adapter->scan_chan_gap_enabled || + !adapter->scan_processing) && + !adapter->data_sent && + !skb_queue_empty(&adapter->tx_data_q)) { + if (adapter->hs_activated_manually) { + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY), + MWIFIEX_ASYNC_CMD); + adapter->hs_activated_manually = false; + } + + mwifiex_process_tx_queue(adapter); + if (adapter->hs_activated) { + clear_bit(MWIFIEX_IS_HS_CONFIGURED, + &adapter->work_flags); + 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))) { + if (adapter->hs_activated_manually) { + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY), + MWIFIEX_ASYNC_CMD); + adapter->hs_activated_manually = false; + } + + mwifiex_process_bypass_tx(adapter); + if (adapter->hs_activated) { + clear_bit(MWIFIEX_IS_HS_CONFIGURED, + &adapter->work_flags); + 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))) { + if (adapter->hs_activated_manually) { + mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY), + MWIFIEX_ASYNC_CMD); + adapter->hs_activated_manually = false; + } + + mwifiex_wmm_process_tx(adapter); + if (adapter->hs_activated) { + clear_bit(MWIFIEX_IS_HS_CONFIGURED, + &adapter->work_flags); + 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); + + 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) +{ + if (adapter->workqueue) { + destroy_workqueue(adapter->workqueue); + adapter->workqueue = NULL; + } + + if (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 int _mwifiex_fw_dpc(const struct firmware *firmware, void *context) +{ + int ret; + char fmt[64]; + struct mwifiex_adapter *adapter = context; + struct mwifiex_fw_image fw; + bool init_failed = false; + struct wireless_dev *wdev; + struct completion *fw_done = adapter->fw_done; + + 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 */ + if (!adapter->mfg_mode) { + wait_event_interruptible(adapter->init_wait_q, + adapter->init_wait_q_woken); + if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) + goto err_init_fw; + } + + if (!adapter->wiphy) { + 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_chan_scan; + } + + if (driver_mode) { + driver_mode &= MWIFIEX_DRIVER_MODE_BITMASK; + driver_mode |= MWIFIEX_DRIVER_MODE_STA; + } + + rtnl_lock(); + wiphy_lock(adapter->wiphy); + /* Create station interface by default */ + wdev = mwifiex_add_virtual_intf(adapter->wiphy, "mlan%d", NET_NAME_ENUM, + NL80211_IFTYPE_STATION, NULL); + if (IS_ERR(wdev)) { + mwifiex_dbg(adapter, ERROR, + "cannot create default STA interface\n"); + wiphy_unlock(adapter->wiphy); + 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); + if (IS_ERR(wdev)) { + mwifiex_dbg(adapter, ERROR, + "cannot create AP interface\n"); + wiphy_unlock(adapter->wiphy); + 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); + if (IS_ERR(wdev)) { + mwifiex_dbg(adapter, ERROR, + "cannot create p2p client interface\n"); + wiphy_unlock(adapter->wiphy); + rtnl_unlock(); + goto err_add_intf; + } + } + wiphy_unlock(adapter->wiphy); + rtnl_unlock(); + + mwifiex_drv_get_driver_version(adapter, fmt, sizeof(fmt) - 1); + mwifiex_dbg(adapter, MSG, "driver_version = %s\n", fmt); + adapter->is_up = true; + goto done; + +err_add_intf: + vfree(adapter->chan_stats); +err_init_chan_scan: + 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); + + set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + mwifiex_terminate_workqueue(adapter); + + if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { + pr_debug("info: %s: shutdown mwifiex\n", __func__); + mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(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) { + if (adapter->irq_wakeup >= 0) + device_init_wakeup(adapter->dev, false); + mwifiex_free_adapter(adapter); + } + /* Tell all current and future waiters we're finished */ + complete_all(fw_done); + + return init_failed ? -EIO : 0; +} + +static void mwifiex_fw_dpc(const struct firmware *firmware, void *context) +{ + _mwifiex_fw_dpc(firmware, context); +} + +/* + * This function gets the firmware and (if called asynchronously) kicks off the + * HW init when done. + */ +static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter, + bool req_fw_nowait) +{ + int ret; + + /* Override default firmware with manufacturing one if + * manufacturing mode is enabled + */ + if (mfg_mode) { + if (strlcpy(adapter->fw_name, MFG_FIRMWARE, + sizeof(adapter->fw_name)) >= + sizeof(adapter->fw_name)) { + pr_err("%s: fw_name too long!\n", __func__); + return -1; + } + } + + if (req_fw_nowait) { + ret = request_firmware_nowait(THIS_MODULE, 1, adapter->fw_name, + adapter->dev, GFP_KERNEL, adapter, + mwifiex_fw_dpc); + } else { + ret = request_firmware(&adapter->firmware, + adapter->fw_name, + adapter->dev); + } + + if (ret < 0) + mwifiex_dbg(adapter, ERROR, "request_firmware%s error %d\n", + req_fw_nowait ? "_nowait" : "", 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) { + struct cfg80211_scan_info info = { + .aborted = true, + }; + + mwifiex_dbg(priv->adapter, INFO, + "aborting scan on ndo_stop\n"); + cfg80211_scan_done(priv->scan_request, &info); + priv->scan_request = NULL; + priv->scan_aborting = true; + } + + if (priv->sched_scanning) { + mwifiex_dbg(priv->adapter, INFO, + "aborting bgscan on ndo_stop\n"); + mwifiex_stop_bg_scan(priv); + cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0); + } + + 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) { + int id; + + spin_lock_bh(&priv->ack_status_lock); + id = idr_alloc(&priv->ack_status_frames, orig_skb, + 1, 0x10, GFP_ATOMIC); + spin_unlock_bh(&priv->ack_status_lock); + + 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 netdev_tx_t +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 (test_bit(MWIFIEX_SURPRISE_REMOVED, &priv->adapter->work_flags)) { + 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; +} + +int mwifiex_set_mac_address(struct mwifiex_private *priv, + struct net_device *dev, bool external, + u8 *new_mac) +{ + int ret; + u64 mac_addr, old_mac_addr; + + old_mac_addr = ether_addr_to_u64(priv->curr_addr); + + if (external) { + mac_addr = ether_addr_to_u64(new_mac); + } else { + /* Internal mac address change */ + if (priv->bss_type == MWIFIEX_BSS_TYPE_ANY) + return -EOPNOTSUPP; + + mac_addr = old_mac_addr; + + if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P) { + mac_addr |= BIT_ULL(MWIFIEX_MAC_LOCAL_ADMIN_BIT); + mac_addr += priv->bss_num; + } else if (priv->adapter->priv[0] != priv) { + /* Set mac address based on bss_type/bss_num */ + mac_addr ^= BIT_ULL(priv->bss_type + 8); + mac_addr += priv->bss_num; + } + } + + u64_to_ether_addr(mac_addr, priv->curr_addr); + + /* Send request to firmware */ + ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_MAC_ADDRESS, + HostCmd_ACT_GEN_SET, 0, NULL, true); + + if (ret) { + u64_to_ether_addr(old_mac_addr, priv->curr_addr); + mwifiex_dbg(priv->adapter, ERROR, + "set mac address failed: ret=%d\n", ret); + return ret; + } + + eth_hw_addr_set(dev, priv->curr_addr); + return 0; +} + +/* CFG802.11 network device handler for setting MAC address. + */ +static int +mwifiex_ndo_set_mac_address(struct net_device *dev, void *addr) +{ + struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); + struct sockaddr *hw_addr = addr; + + return mwifiex_set_mac_address(priv, dev, true, hw_addr->sa_data); +} + +/* + * 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, unsigned int txqueue) +{ + 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_multi_chan_resync(struct mwifiex_adapter *adapter) +{ + struct usb_card_rec *card = adapter->card; + struct mwifiex_private *priv; + u16 tx_buf_size; + int i, ret; + + card->mc_resync_flag = true; + for (i = 0; i < MWIFIEX_TX_DATA_PORT; i++) { + if (atomic_read(&card->port[i].tx_data_urb_pending)) { + mwifiex_dbg(adapter, WARN, "pending data urb in sys\n"); + return; + } + } + + card->mc_resync_flag = false; + tx_buf_size = 0xffff; + priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); + ret = mwifiex_send_cmd(priv, HostCmd_CMD_RECONFIGURE_TX_BUFF, + HostCmd_ACT_GEN_SET, 0, &tx_buf_size, false); + if (ret) + mwifiex_dbg(adapter, ERROR, + "send reconfig tx buf size cmd err\n"); +} +EXPORT_SYMBOL_GPL(mwifiex_multi_chan_resync); + +void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter) +{ + /* 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\n"); + dev_coredumpv(adapter->dev, adapter->devdump_data, adapter->devdump_len, + GFP_KERNEL); + mwifiex_dbg(adapter, MSG, + "== mwifiex dump information to /sys/class/devcoredump end\n"); + + /* Device dump data will be freed in device coredump release function + * after 5 min. Here reset adapter->devdump_data and ->devdump_len + * to avoid it been accidentally reused. + */ + adapter->devdump_data = NULL; + adapter->devdump_len = 0; +} +EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump); + +void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter) +{ + char *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; + + mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump start===\n"); + + p = adapter->devdump_data; + strcpy(p, "========Start dump driverinfo========\n"); + p += strlen("========Start dump driverinfo========\n"); + 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_port_0 = %d\n", + atomic_read(&cardp->port[0].tx_data_urb_pending)); + p += sprintf(p, "tx_data_urb_pending_port_1 = %d\n", + atomic_read(&cardp->port[1].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 || + adapter->iface_type == MWIFIEX_PCIE) { + p += sprintf(p, "\n=== %s register dump===\n", + adapter->iface_type == MWIFIEX_SDIO ? + "SDIO" : "PCIE"); + 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); + } + + strcpy(p, "\n========End dump========\n"); + p += strlen("\n========End dump========\n"); + mwifiex_dbg(adapter, MSG, "===mwifiex driverinfo dump end===\n"); + adapter->devdump_len = p - (char *)adapter->devdump_data; +} +EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump); + +void mwifiex_prepare_fw_dump_info(struct mwifiex_adapter *adapter) +{ + u8 idx; + char *fw_dump_ptr; + u32 dump_len = 0; + + 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")); + } + } + + if (dump_len + 1 + adapter->devdump_len > MWIFIEX_FW_DUMP_SIZE) { + /* Realloc in case buffer overflow */ + fw_dump_ptr = vzalloc(dump_len + 1 + adapter->devdump_len); + mwifiex_dbg(adapter, MSG, "Realloc device dump data.\n"); + if (!fw_dump_ptr) { + vfree(adapter->devdump_data); + mwifiex_dbg(adapter, ERROR, + "vzalloc devdump data failure!\n"); + return; + } + + memmove(fw_dump_ptr, adapter->devdump_data, + adapter->devdump_len); + vfree(adapter->devdump_data); + adapter->devdump_data = fw_dump_ptr; + } + + fw_dump_ptr = (char *)adapter->devdump_data + adapter->devdump_len; + + 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"); + } + } + + adapter->devdump_len = fw_dump_ptr - (char *)adapter->devdump_data; + + for (idx = 0; idx < adapter->num_mem_types; idx++) { + struct memory_type_mapping *entry = + &adapter->mem_type_mapping_tbl[idx]; + + vfree(entry->mem_ptr); + entry->mem_ptr = NULL; + entry->mem_size = 0; + } +} +EXPORT_SYMBOL_GPL(mwifiex_prepare_fw_dump_info); + +/* + * 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, + struct net_device *sb_dev) +{ + 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_ndo_set_mac_address, + .ndo_validate_addr = eth_validate_addr, + .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->needs_free_netdev = true; + /* 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; + if (is_valid_ether_addr(dev->dev_addr)) + ether_addr_copy(priv->curr_addr, dev->dev_addr); + else + ether_addr_copy(priv->curr_addr, priv->adapter->perm_addr); + + 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) +{ + int is_cmd_pend_q_empty; + + spin_lock_bh(&adapter->cmd_pending_q_lock); + is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q); + spin_unlock_bh(&adapter->cmd_pending_q_lock); + + 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 (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags)) + 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 (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags)) + return; + mwifiex_main_process(adapter); +} + +/* Common teardown code used for both device removal and reset */ +static void mwifiex_uninit_sw(struct mwifiex_adapter *adapter) +{ + struct mwifiex_private *priv; + int i; + + /* 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); + + set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + mwifiex_terminate_workqueue(adapter); + adapter->int_status = 0; + + /* 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); + netif_device_detach(priv->netdev); + } + } + + mwifiex_dbg(adapter, CMD, "cmd: calling mwifiex_shutdown_drv...\n"); + mwifiex_shutdown_drv(adapter); + 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) { + /* + * Close the netdev now, because if we do it later, the + * netdev notifiers will need to acquire the wiphy lock + * again --> deadlock. + */ + dev_close(priv->wdev.netdev); + wiphy_lock(adapter->wiphy); + mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev); + wiphy_unlock(adapter->wiphy); + } + rtnl_unlock(); + } + + wiphy_unregister(adapter->wiphy); + wiphy_free(adapter->wiphy); + adapter->wiphy = NULL; + + vfree(adapter->chan_stats); + mwifiex_free_cmd_buffers(adapter); +} + +/* + * This function can be used for shutting down the adapter SW. + */ +int mwifiex_shutdown_sw(struct mwifiex_adapter *adapter) +{ + struct mwifiex_private *priv; + + if (!adapter) + return 0; + + wait_for_completion(adapter->fw_done); + /* Caller should ensure we aren't suspending while this happens */ + reinit_completion(adapter->fw_done); + + priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY); + mwifiex_deauthenticate(priv, NULL); + + mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN); + + mwifiex_uninit_sw(adapter); + adapter->is_up = false; + + if (adapter->if_ops.down_dev) + adapter->if_ops.down_dev(adapter); + + return 0; +} +EXPORT_SYMBOL_GPL(mwifiex_shutdown_sw); + +/* This function can be used for reinitting the adapter SW. Required + * code is extracted from mwifiex_add_card() + */ +int +mwifiex_reinit_sw(struct mwifiex_adapter *adapter) +{ + int ret; + + mwifiex_init_lock_list(adapter); + if (adapter->if_ops.up_dev) + adapter->if_ops.up_dev(adapter); + + adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; + clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + init_waitqueue_head(&adapter->init_wait_q); + clear_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags); + adapter->hs_activated = false; + clear_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags); + 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; + + 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. Some code extracted from + * mwifiex_register_dev() + */ + mwifiex_dbg(adapter, INFO, "%s, mwifiex_init_hw_fw()...\n", __func__); + + if (mwifiex_init_hw_fw(adapter, false)) { + mwifiex_dbg(adapter, ERROR, + "%s: firmware init failed\n", __func__); + goto err_init_fw; + } + + /* _mwifiex_fw_dpc() does its own cleanup */ + ret = _mwifiex_fw_dpc(adapter->firmware, adapter); + if (ret) { + pr_err("Failed to bring up adapter: %d\n", ret); + return ret; + } + mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__); + + return 0; + +err_init_fw: + mwifiex_dbg(adapter, ERROR, "info: %s: unregister device\n", __func__); + if (adapter->if_ops.unregister_dev) + adapter->if_ops.unregister_dev(adapter); + +err_kmalloc: + set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + mwifiex_terminate_workqueue(adapter); + if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { + mwifiex_dbg(adapter, ERROR, + "info: %s: shutdown mwifiex\n", __func__); + mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(adapter); + } + + complete_all(adapter->fw_done); + mwifiex_dbg(adapter, INFO, "%s, error\n", __func__); + + return -1; +} +EXPORT_SYMBOL_GPL(mwifiex_reinit_sw); + +static irqreturn_t mwifiex_irq_wakeup_handler(int irq, void *priv) +{ + struct mwifiex_adapter *adapter = priv; + + dev_dbg(adapter->dev, "%s: wake by wifi", __func__); + adapter->wake_by_wifi = true; + disable_irq_nosync(irq); + + /* Notify PM core we are wakeup source */ + pm_wakeup_event(adapter->dev, 0); + pm_system_wakeup(); + + return IRQ_HANDLED; +} + +static void mwifiex_probe_of(struct mwifiex_adapter *adapter) +{ + int ret; + struct device *dev = adapter->dev; + + if (!dev->of_node) + goto err_exit; + + adapter->dt_node = dev->of_node; + adapter->irq_wakeup = irq_of_parse_and_map(adapter->dt_node, 0); + if (!adapter->irq_wakeup) { + dev_dbg(dev, "fail to parse irq_wakeup from device tree\n"); + goto err_exit; + } + + ret = devm_request_irq(dev, adapter->irq_wakeup, + mwifiex_irq_wakeup_handler, IRQF_TRIGGER_LOW, + "wifi_wake", adapter); + if (ret) { + dev_err(dev, "Failed to request irq_wakeup %d (%d)\n", + adapter->irq_wakeup, ret); + goto err_exit; + } + + disable_irq(adapter->irq_wakeup); + if (device_init_wakeup(dev, true)) { + dev_err(dev, "fail to init wakeup for mwifiex\n"); + goto err_exit; + } + return; + +err_exit: + adapter->irq_wakeup = -1; +} + +/* + * 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 completion *fw_done, + struct mwifiex_if_ops *if_ops, u8 iface_type, + struct device *dev) +{ + struct mwifiex_adapter *adapter; + + if (mwifiex_register(card, dev, if_ops, (void **)&adapter)) { + pr_err("%s: software init failed\n", __func__); + goto err_init_sw; + } + + mwifiex_probe_of(adapter); + + adapter->iface_type = iface_type; + adapter->fw_done = fw_done; + + adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING; + clear_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + init_waitqueue_head(&adapter->init_wait_q); + clear_bit(MWIFIEX_IS_SUSPENDED, &adapter->work_flags); + 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; + + 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, true)) { + 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); +err_registerdev: + set_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags); + mwifiex_terminate_workqueue(adapter); + if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { + pr_debug("info: %s: shutdown mwifiex\n", __func__); + mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(adapter); + } +err_kmalloc: + if (adapter->irq_wakeup >= 0) + device_init_wakeup(adapter->dev, false); + mwifiex_free_adapter(adapter); + +err_init_sw: + + 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) +{ + if (!adapter) + return 0; + + if (adapter->is_up) + mwifiex_uninit_sw(adapter); + + if (adapter->irq_wakeup >= 0) + device_init_wakeup(adapter->dev, false); + + /* 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); + + return 0; +} +EXPORT_SYMBOL_GPL(mwifiex_remove_card); + +void _mwifiex_dbg(const struct mwifiex_adapter *adapter, int mask, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + + if (!(adapter->debug_mask & mask)) + return; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + if (adapter->dev) + dev_info(adapter->dev, "%pV", &vaf); + else + pr_info("%pV", &vaf); + + va_end(args); +} +EXPORT_SYMBOL_GPL(_mwifiex_dbg); + +/* + * 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"); |