// SPDX-License-Identifier: GPL-2.0-only /* * This file contains the major functions in WLAN * driver. It includes init, exit, open, close and main * thread etc.. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include "host.h" #include "decl.h" #include "dev.h" #include "cfg.h" #include "debugfs.h" #include "cmd.h" #include "mesh.h" #define DRIVER_RELEASE_VERSION "323.p0" const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION #ifdef DEBUG "-dbg" #endif ""; /* Module parameters */ unsigned int lbs_debug; EXPORT_SYMBOL_GPL(lbs_debug); module_param_named(libertas_debug, lbs_debug, int, 0644); unsigned int lbs_disablemesh; EXPORT_SYMBOL_GPL(lbs_disablemesh); module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644); /* * This global structure is used to send the confirm_sleep command as * fast as possible down to the firmware. */ struct cmd_confirm_sleep confirm_sleep; /* * the table to keep region code */ u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] = { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 }; /* * FW rate table. FW refers to rates by their index in this table, not by the * rate value itself. Values of 0x00 are * reserved positions. */ static u8 fw_data_rates[MAX_RATES] = { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00 }; /** * lbs_fw_index_to_data_rate - use index to get the data rate * * @idx: The index of data rate * returns: data rate or 0 */ u32 lbs_fw_index_to_data_rate(u8 idx) { if (idx >= sizeof(fw_data_rates)) idx = 0; return fw_data_rates[idx]; } /** * lbs_data_rate_to_fw_index - use rate to get the index * * @rate: data rate * returns: index or 0 */ u8 lbs_data_rate_to_fw_index(u32 rate) { u8 i; if (!rate) return 0; for (i = 0; i < sizeof(fw_data_rates); i++) { if (rate == fw_data_rates[i]) return i; } return 0; } int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type) { int ret = 0; switch (type) { case NL80211_IFTYPE_MONITOR: ret = lbs_set_monitor_mode(priv, 1); break; case NL80211_IFTYPE_STATION: if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) ret = lbs_set_monitor_mode(priv, 0); if (!ret) ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1); break; case NL80211_IFTYPE_ADHOC: if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR) ret = lbs_set_monitor_mode(priv, 0); if (!ret) ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2); break; default: ret = -ENOTSUPP; } return ret; } int lbs_start_iface(struct lbs_private *priv) { struct cmd_ds_802_11_mac_address cmd; int ret; if (priv->power_restore) { ret = priv->power_restore(priv); if (ret) return ret; } cmd.hdr.size = cpu_to_le16(sizeof(cmd)); cmd.action = cpu_to_le16(CMD_ACT_SET); memcpy(cmd.macadd, priv->current_addr, ETH_ALEN); ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd); if (ret) { lbs_deb_net("set MAC address failed\n"); goto err; } ret = lbs_set_iface_type(priv, priv->wdev->iftype); if (ret) { lbs_deb_net("set iface type failed\n"); goto err; } ret = lbs_set_11d_domain_info(priv); if (ret) { lbs_deb_net("set 11d domain info failed\n"); goto err; } lbs_update_channel(priv); priv->iface_running = true; return 0; err: if (priv->power_save) priv->power_save(priv); return ret; } /** * lbs_dev_open - open the ethX interface * * @dev: A pointer to &net_device structure * returns: 0 or -EBUSY if monitor mode active */ static int lbs_dev_open(struct net_device *dev) { struct lbs_private *priv = dev->ml_priv; int ret = 0; if (!priv->iface_running) { ret = lbs_start_iface(priv); if (ret) goto out; } spin_lock_irq(&priv->driver_lock); netif_carrier_off(dev); if (!priv->tx_pending_len) netif_wake_queue(dev); spin_unlock_irq(&priv->driver_lock); out: return ret; } static bool lbs_command_queue_empty(struct lbs_private *priv) { unsigned long flags; bool ret; spin_lock_irqsave(&priv->driver_lock, flags); ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq); spin_unlock_irqrestore(&priv->driver_lock, flags); return ret; } int lbs_stop_iface(struct lbs_private *priv) { unsigned long flags; int ret = 0; spin_lock_irqsave(&priv->driver_lock, flags); priv->iface_running = false; kfree_skb(priv->currenttxskb); priv->currenttxskb = NULL; priv->tx_pending_len = 0; spin_unlock_irqrestore(&priv->driver_lock, flags); cancel_work_sync(&priv->mcast_work); del_timer_sync(&priv->tx_lockup_timer); /* Disable command processing, and wait for all commands to complete */ lbs_deb_main("waiting for commands to complete\n"); wait_event(priv->waitq, lbs_command_queue_empty(priv)); lbs_deb_main("all commands completed\n"); if (priv->power_save) ret = priv->power_save(priv); return ret; } /** * lbs_eth_stop - close the ethX interface * * @dev: A pointer to &net_device structure * returns: 0 */ static int lbs_eth_stop(struct net_device *dev) { struct lbs_private *priv = dev->ml_priv; if (priv->connect_status == LBS_CONNECTED) lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING); spin_lock_irq(&priv->driver_lock); netif_stop_queue(dev); spin_unlock_irq(&priv->driver_lock); lbs_update_mcast(priv); cancel_delayed_work_sync(&priv->scan_work); if (priv->scan_req) lbs_scan_done(priv); netif_carrier_off(priv->dev); if (!lbs_iface_active(priv)) lbs_stop_iface(priv); return 0; } void lbs_host_to_card_done(struct lbs_private *priv) { unsigned long flags; spin_lock_irqsave(&priv->driver_lock, flags); del_timer(&priv->tx_lockup_timer); priv->dnld_sent = DNLD_RES_RECEIVED; /* Wake main thread if commands are pending */ if (!priv->cur_cmd || priv->tx_pending_len > 0) { if (!priv->wakeup_dev_required) wake_up(&priv->waitq); } spin_unlock_irqrestore(&priv->driver_lock, flags); } EXPORT_SYMBOL_GPL(lbs_host_to_card_done); int lbs_set_mac_address(struct net_device *dev, void *addr) { int ret = 0; struct lbs_private *priv = dev->ml_priv; struct sockaddr *phwaddr = addr; /* * Can only set MAC address when all interfaces are down, to be written * to the hardware when one of them is brought up. */ if (lbs_iface_active(priv)) return -EBUSY; /* In case it was called from the mesh device */ dev = priv->dev; memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN); eth_hw_addr_set(dev, phwaddr->sa_data); if (priv->mesh_dev) eth_hw_addr_set(priv->mesh_dev, phwaddr->sa_data); return ret; } static inline int mac_in_list(unsigned char *list, int list_len, unsigned char *mac) { while (list_len) { if (!memcmp(list, mac, ETH_ALEN)) return 1; list += ETH_ALEN; list_len--; } return 0; } static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd, struct net_device *dev, int nr_addrs) { int i = nr_addrs; struct netdev_hw_addr *ha; int cnt; if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST)) return nr_addrs; netif_addr_lock_bh(dev); cnt = netdev_mc_count(dev); netdev_for_each_mc_addr(ha, dev) { if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) { lbs_deb_net("mcast address %s:%pM skipped\n", dev->name, ha->addr); cnt--; continue; } if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE) break; memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN); lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name, ha->addr); i++; cnt--; } netif_addr_unlock_bh(dev); if (cnt) return -EOVERFLOW; return i; } void lbs_update_mcast(struct lbs_private *priv) { struct cmd_ds_mac_multicast_adr mcast_cmd; int dev_flags = 0; int nr_addrs; int old_mac_control = priv->mac_control; if (netif_running(priv->dev)) dev_flags |= priv->dev->flags; if (priv->mesh_dev && netif_running(priv->mesh_dev)) dev_flags |= priv->mesh_dev->flags; if (dev_flags & IFF_PROMISC) { priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE | CMD_ACT_MAC_MULTICAST_ENABLE); goto out_set_mac_control; } else if (dev_flags & IFF_ALLMULTI) { do_allmulti: priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | CMD_ACT_MAC_MULTICAST_ENABLE); goto out_set_mac_control; } /* Once for priv->dev, again for priv->mesh_dev if it exists */ nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0); if (nr_addrs >= 0 && priv->mesh_dev) nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs); if (nr_addrs < 0) goto do_allmulti; if (nr_addrs) { int size = offsetof(struct cmd_ds_mac_multicast_adr, maclist[6*nr_addrs]); mcast_cmd.action = cpu_to_le16(CMD_ACT_SET); mcast_cmd.hdr.size = cpu_to_le16(size); mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs); lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size); priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE; } else priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE; priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE | CMD_ACT_MAC_ALL_MULTICAST_ENABLE); out_set_mac_control: if (priv->mac_control != old_mac_control) lbs_set_mac_control(priv); } static void lbs_set_mcast_worker(struct work_struct *work) { struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work); lbs_update_mcast(priv); } void lbs_set_multicast_list(struct net_device *dev) { struct lbs_private *priv = dev->ml_priv; schedule_work(&priv->mcast_work); } /** * lbs_thread - handles the major jobs in the LBS driver. * It handles all events generated by firmware, RX data received * from firmware and TX data sent from kernel. * * @data: A pointer to &lbs_thread structure * returns: 0 */ static int lbs_thread(void *data) { struct net_device *dev = data; struct lbs_private *priv = dev->ml_priv; wait_queue_entry_t wait; init_waitqueue_entry(&wait, current); for (;;) { int shouldsleep; u8 resp_idx; lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); add_wait_queue(&priv->waitq, &wait); set_current_state(TASK_INTERRUPTIBLE); spin_lock_irq(&priv->driver_lock); if (kthread_should_stop()) shouldsleep = 0; /* Bye */ else if (priv->surpriseremoved) shouldsleep = 1; /* We need to wait until we're _told_ to die */ else if (priv->psstate == PS_STATE_SLEEP) shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */ else if (priv->cmd_timed_out) shouldsleep = 0; /* Command timed out. Recover */ else if (!priv->fw_ready) shouldsleep = 1; /* Firmware not ready. We're waiting for it */ else if (priv->dnld_sent) shouldsleep = 1; /* Something is en route to the device already */ else if (priv->tx_pending_len > 0) shouldsleep = 0; /* We've a packet to send */ else if (priv->resp_len[priv->resp_idx]) shouldsleep = 0; /* We have a command response */ else if (priv->cur_cmd) shouldsleep = 1; /* Can't send a command; one already running */ else if (!list_empty(&priv->cmdpendingq) && !(priv->wakeup_dev_required)) shouldsleep = 0; /* We have a command to send */ else if (kfifo_len(&priv->event_fifo)) shouldsleep = 0; /* We have an event to process */ else shouldsleep = 1; /* No command */ if (shouldsleep) { lbs_deb_thread("sleeping, connect_status %d, " "psmode %d, psstate %d\n", priv->connect_status, priv->psmode, priv->psstate); spin_unlock_irq(&priv->driver_lock); schedule(); } else spin_unlock_irq(&priv->driver_lock); lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n", priv->currenttxskb, priv->dnld_sent); set_current_state(TASK_RUNNING); remove_wait_queue(&priv->waitq, &wait); lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); if (kthread_should_stop()) { lbs_deb_thread("break from main thread\n"); break; } if (priv->surpriseremoved) { lbs_deb_thread("adapter removed; waiting to die...\n"); continue; } lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n", priv->currenttxskb, priv->dnld_sent); /* Process any pending command response */ spin_lock_irq(&priv->driver_lock); resp_idx = priv->resp_idx; if (priv->resp_len[resp_idx]) { spin_unlock_irq(&priv->driver_lock); lbs_process_command_response(priv, priv->resp_buf[resp_idx], priv->resp_len[resp_idx]); spin_lock_irq(&priv->driver_lock); priv->resp_len[resp_idx] = 0; } spin_unlock_irq(&priv->driver_lock); /* Process hardware events, e.g. card removed, link lost */ spin_lock_irq(&priv->driver_lock); while (kfifo_len(&priv->event_fifo)) { u32 event; if (kfifo_out(&priv->event_fifo, (unsigned char *) &event, sizeof(event)) != sizeof(event)) break; spin_unlock_irq(&priv->driver_lock); lbs_process_event(priv, event); spin_lock_irq(&priv->driver_lock); } spin_unlock_irq(&priv->driver_lock); if (priv->wakeup_dev_required) { lbs_deb_thread("Waking up device...\n"); /* Wake up device */ if (priv->exit_deep_sleep(priv)) lbs_deb_thread("Wakeup device failed\n"); continue; } /* command timeout stuff */ if (priv->cmd_timed_out && priv->cur_cmd) { struct cmd_ctrl_node *cmdnode = priv->cur_cmd; netdev_info(dev, "Timeout submitting command 0x%04x\n", le16_to_cpu(cmdnode->cmdbuf->command)); lbs_complete_command(priv, cmdnode, -ETIMEDOUT); /* Reset card, but only when it isn't in the process * of being shutdown anyway. */ if (!dev->dismantle && priv->reset_card) priv->reset_card(priv); } priv->cmd_timed_out = 0; if (!priv->fw_ready) continue; /* Check if we need to confirm Sleep Request received previously */ if (priv->psstate == PS_STATE_PRE_SLEEP && !priv->dnld_sent && !priv->cur_cmd) { if (priv->connect_status == LBS_CONNECTED) { lbs_deb_thread("pre-sleep, currenttxskb %p, " "dnld_sent %d, cur_cmd %p\n", priv->currenttxskb, priv->dnld_sent, priv->cur_cmd); lbs_ps_confirm_sleep(priv); } else { /* workaround for firmware sending * deauth/linkloss event immediately * after sleep request; remove this * after firmware fixes it */ priv->psstate = PS_STATE_AWAKE; netdev_alert(dev, "ignore PS_SleepConfirm in non-connected state\n"); } } /* The PS state is changed during processing of Sleep Request * event above */ if ((priv->psstate == PS_STATE_SLEEP) || (priv->psstate == PS_STATE_PRE_SLEEP)) continue; if (priv->is_deep_sleep) continue; /* Execute the next command */ if (!priv->dnld_sent && !priv->cur_cmd) lbs_execute_next_command(priv); spin_lock_irq(&priv->driver_lock); if (!priv->dnld_sent && priv->tx_pending_len > 0) { int ret = priv->hw_host_to_card(priv, MVMS_DAT, priv->tx_pending_buf, priv->tx_pending_len); if (ret) { lbs_deb_tx("host_to_card failed %d\n", ret); priv->dnld_sent = DNLD_RES_RECEIVED; } else { mod_timer(&priv->tx_lockup_timer, jiffies + (HZ * 5)); } priv->tx_pending_len = 0; if (!priv->currenttxskb) { /* We can wake the queues immediately if we aren't waiting for TX feedback */ if (priv->connect_status == LBS_CONNECTED) netif_wake_queue(priv->dev); if (priv->mesh_dev && netif_running(priv->mesh_dev)) netif_wake_queue(priv->mesh_dev); } } spin_unlock_irq(&priv->driver_lock); } del_timer(&priv->command_timer); del_timer(&priv->tx_lockup_timer); del_timer(&priv->auto_deepsleep_timer); return 0; } /** * lbs_setup_firmware - gets the HW spec from the firmware and sets * some basic parameters * * @priv: A pointer to &struct lbs_private structure * returns: 0 or -1 */ static int lbs_setup_firmware(struct lbs_private *priv) { int ret = -1; s16 curlevel = 0, minlevel = 0, maxlevel = 0; /* Read MAC address from firmware */ eth_broadcast_addr(priv->current_addr); ret = lbs_update_hw_spec(priv); if (ret) goto done; /* Read power levels if available */ ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel); if (ret == 0) { priv->txpower_cur = curlevel; priv->txpower_min = minlevel; priv->txpower_max = maxlevel; } /* Send cmd to FW to enable 11D function */ ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1); if (ret) goto done; ret = lbs_set_mac_control_sync(priv); done: return ret; } int lbs_suspend(struct lbs_private *priv) { int ret; if (priv->is_deep_sleep) { ret = lbs_set_deep_sleep(priv, 0); if (ret) { netdev_err(priv->dev, "deep sleep cancellation failed: %d\n", ret); return ret; } priv->deep_sleep_required = 1; } ret = lbs_set_host_sleep(priv, 1); netif_device_detach(priv->dev); if (priv->mesh_dev) netif_device_detach(priv->mesh_dev); return ret; } EXPORT_SYMBOL_GPL(lbs_suspend); int lbs_resume(struct lbs_private *priv) { int ret; ret = lbs_set_host_sleep(priv, 0); netif_device_attach(priv->dev); if (priv->mesh_dev) netif_device_attach(priv->mesh_dev); if (priv->deep_sleep_required) { priv->deep_sleep_required = 0; ret = lbs_set_deep_sleep(priv, 1); if (ret) netdev_err(priv->dev, "deep sleep activation failed: %d\n", ret); } if (priv->setup_fw_on_resume) ret = lbs_setup_firmware(priv); return ret; } EXPORT_SYMBOL_GPL(lbs_resume); /** * lbs_cmd_timeout_handler - handles the timeout of command sending. * It will re-send the same command again. * * @t: Context from which to retrieve a &struct lbs_private pointer */ static void lbs_cmd_timeout_handler(struct timer_list *t) { struct lbs_private *priv = from_timer(priv, t, command_timer); unsigned long flags; spin_lock_irqsave(&priv->driver_lock, flags); if (!priv->cur_cmd) goto out; netdev_info(priv->dev, "command 0x%04x timed out\n", le16_to_cpu(priv->cur_cmd->cmdbuf->command)); priv->cmd_timed_out = 1; /* * If the device didn't even acknowledge the command, reset the state * so that we don't block all future commands due to this one timeout. */ if (priv->dnld_sent == DNLD_CMD_SENT) priv->dnld_sent = DNLD_RES_RECEIVED; wake_up(&priv->waitq); out: spin_unlock_irqrestore(&priv->driver_lock, flags); } /** * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames * to the hardware. This is known to frequently happen with SD8686 when * waking up after a Wake-on-WLAN-triggered resume. * * @t: Context from which to retrieve a &struct lbs_private pointer */ static void lbs_tx_lockup_handler(struct timer_list *t) { struct lbs_private *priv = from_timer(priv, t, tx_lockup_timer); unsigned long flags; spin_lock_irqsave(&priv->driver_lock, flags); netdev_info(priv->dev, "TX lockup detected\n"); if (priv->reset_card) priv->reset_card(priv); priv->dnld_sent = DNLD_RES_RECEIVED; wake_up_interruptible(&priv->waitq); spin_unlock_irqrestore(&priv->driver_lock, flags); } /** * auto_deepsleep_timer_fn - put the device back to deep sleep mode when * timer expires and no activity (command, event, data etc.) is detected. * @t: Context from which to retrieve a &struct lbs_private pointer * returns: N/A */ static void auto_deepsleep_timer_fn(struct timer_list *t) { struct lbs_private *priv = from_timer(priv, t, auto_deepsleep_timer); if (priv->is_activity_detected) { priv->is_activity_detected = 0; } else { if (priv->is_auto_deep_sleep_enabled && (!priv->wakeup_dev_required) && (priv->connect_status != LBS_CONNECTED)) { struct cmd_header cmd; lbs_deb_main("Entering auto deep sleep mode...\n"); memset(&cmd, 0, sizeof(cmd)); cmd.size = cpu_to_le16(sizeof(cmd)); lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd)); } } mod_timer(&priv->auto_deepsleep_timer , jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000); } int lbs_enter_auto_deep_sleep(struct lbs_private *priv) { priv->is_auto_deep_sleep_enabled = 1; if (priv->is_deep_sleep) priv->wakeup_dev_required = 1; mod_timer(&priv->auto_deepsleep_timer , jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000); return 0; } int lbs_exit_auto_deep_sleep(struct lbs_private *priv) { priv->is_auto_deep_sleep_enabled = 0; priv->auto_deep_sleep_timeout = 0; del_timer(&priv->auto_deepsleep_timer); return 0; } static int lbs_init_adapter(struct lbs_private *priv) { int ret; eth_broadcast_addr(priv->current_addr); priv->connect_status = LBS_DISCONNECTED; priv->channel = DEFAULT_AD_HOC_CHANNEL; priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON; priv->radio_on = 1; priv->psmode = LBS802_11POWERMODECAM; priv->psstate = PS_STATE_FULL_POWER; priv->is_deep_sleep = 0; priv->is_auto_deep_sleep_enabled = 0; priv->deep_sleep_required = 0; priv->wakeup_dev_required = 0; init_waitqueue_head(&priv->ds_awake_q); init_waitqueue_head(&priv->scan_q); priv->authtype_auto = 1; priv->is_host_sleep_configured = 0; priv->is_host_sleep_activated = 0; init_waitqueue_head(&priv->host_sleep_q); init_waitqueue_head(&priv->fw_waitq); mutex_init(&priv->lock); timer_setup(&priv->command_timer, lbs_cmd_timeout_handler, 0); timer_setup(&priv->tx_lockup_timer, lbs_tx_lockup_handler, 0); timer_setup(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn, 0); INIT_LIST_HEAD(&priv->cmdfreeq); INIT_LIST_HEAD(&priv->cmdpendingq); spin_lock_init(&priv->driver_lock); /* Allocate the command buffers */ if (lbs_allocate_cmd_buffer(priv)) { pr_err("Out of memory allocating command buffers\n"); ret = -ENOMEM; goto out; } priv->resp_idx = 0; priv->resp_len[0] = priv->resp_len[1] = 0; /* Create the event FIFO */ ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL); if (ret) { pr_err("Out of memory allocating event FIFO buffer\n"); goto out; } out: return ret; } static void lbs_free_adapter(struct lbs_private *priv) { lbs_free_cmd_buffer(priv); kfifo_free(&priv->event_fifo); del_timer(&priv->command_timer); del_timer(&priv->tx_lockup_timer); del_timer(&priv->auto_deepsleep_timer); } static const struct net_device_ops lbs_netdev_ops = { .ndo_open = lbs_dev_open, .ndo_stop = lbs_eth_stop, .ndo_start_xmit = lbs_hard_start_xmit, .ndo_set_mac_address = lbs_set_mac_address, .ndo_set_rx_mode = lbs_set_multicast_list, .ndo_validate_addr = eth_validate_addr, }; /** * lbs_add_card - adds the card. It will probe the * card, allocate the lbs_priv and initialize the device. * * @card: A pointer to card * @dmdev: A pointer to &struct device * returns: A pointer to &struct lbs_private structure */ struct lbs_private *lbs_add_card(void *card, struct device *dmdev) { struct net_device *dev; struct wireless_dev *wdev; struct lbs_private *priv = NULL; int err; /* Allocate an Ethernet device and register it */ wdev = lbs_cfg_alloc(dmdev); if (IS_ERR(wdev)) { err = PTR_ERR(wdev); pr_err("cfg80211 init failed\n"); goto err_cfg; } wdev->iftype = NL80211_IFTYPE_STATION; priv = wdev_priv(wdev); priv->wdev = wdev; err = lbs_init_adapter(priv); if (err) { pr_err("failed to initialize adapter structure\n"); goto err_wdev; } dev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup); if (!dev) { err = -ENOMEM; dev_err(dmdev, "no memory for network device instance\n"); goto err_adapter; } dev->ieee80211_ptr = wdev; dev->ml_priv = priv; SET_NETDEV_DEV(dev, dmdev); wdev->netdev = dev; priv->dev = dev; dev->netdev_ops = &lbs_netdev_ops; dev->watchdog_timeo = 5 * HZ; dev->ethtool_ops = &lbs_ethtool_ops; dev->flags |= IFF_BROADCAST | IFF_MULTICAST; priv->card = card; strcpy(dev->name, "wlan%d"); lbs_deb_thread("Starting main thread...\n"); init_waitqueue_head(&priv->waitq); priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main"); if (IS_ERR(priv->main_thread)) { err = PTR_ERR(priv->main_thread); lbs_deb_thread("Error creating main thread.\n"); goto err_ndev; } priv->work_thread = create_singlethread_workqueue("lbs_worker"); INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker); priv->wol_criteria = EHS_REMOVE_WAKEUP; priv->wol_gpio = 0xff; priv->wol_gap = 20; priv->ehs_remove_supported = true; return priv; err_ndev: free_netdev(dev); err_adapter: lbs_free_adapter(priv); err_wdev: lbs_cfg_free(priv); err_cfg: return ERR_PTR(err); } EXPORT_SYMBOL_GPL(lbs_add_card); void lbs_remove_card(struct lbs_private *priv) { struct net_device *dev = priv->dev; lbs_remove_mesh(priv); if (priv->wiphy_registered) lbs_scan_deinit(priv); lbs_wait_for_firmware_load(priv); /* worker thread destruction blocks on the in-flight command which * should have been cleared already in lbs_stop_card(). */ lbs_deb_main("destroying worker thread\n"); destroy_workqueue(priv->work_thread); lbs_deb_main("done destroying worker thread\n"); if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { priv->psmode = LBS802_11POWERMODECAM; /* no need to wakeup if already woken up, * on suspend, this exit ps command is not processed * the driver hangs */ if (priv->psstate != PS_STATE_FULL_POWER) lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true); } if (priv->is_deep_sleep) { priv->is_deep_sleep = 0; wake_up_interruptible(&priv->ds_awake_q); } priv->is_host_sleep_configured = 0; priv->is_host_sleep_activated = 0; wake_up_interruptible(&priv->host_sleep_q); /* Stop the thread servicing the interrupts */ priv->surpriseremoved = 1; kthread_stop(priv->main_thread); lbs_free_adapter(priv); lbs_cfg_free(priv); free_netdev(dev); } EXPORT_SYMBOL_GPL(lbs_remove_card); int lbs_rtap_supported(struct lbs_private *priv) { if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5) return 1; /* newer firmware use a capability mask */ return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) && (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK)); } int lbs_start_card(struct lbs_private *priv) { struct net_device *dev = priv->dev; int ret; /* poke the firmware */ ret = lbs_setup_firmware(priv); if (ret) goto done; if (!lbs_disablemesh) lbs_init_mesh(priv); else pr_info("%s: mesh disabled\n", dev->name); ret = lbs_cfg_register(priv); if (ret) { pr_err("cannot register device\n"); goto done; } if (lbs_mesh_activated(priv)) lbs_start_mesh(priv); lbs_debugfs_init_one(priv, dev); netdev_info(dev, "Marvell WLAN 802.11 adapter\n"); ret = 0; done: return ret; } EXPORT_SYMBOL_GPL(lbs_start_card); void lbs_stop_card(struct lbs_private *priv) { struct net_device *dev; if (!priv) return; dev = priv->dev; /* If the netdev isn't registered, it means that lbs_start_card() was * never called so we have nothing to do here. */ if (dev->reg_state != NETREG_REGISTERED) return; netif_stop_queue(dev); netif_carrier_off(dev); lbs_debugfs_remove_one(priv); lbs_deinit_mesh(priv); unregister_netdev(dev); } EXPORT_SYMBOL_GPL(lbs_stop_card); void lbs_queue_event(struct lbs_private *priv, u32 event) { unsigned long flags; spin_lock_irqsave(&priv->driver_lock, flags); if (priv->psstate == PS_STATE_SLEEP) priv->psstate = PS_STATE_AWAKE; kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32)); wake_up(&priv->waitq); spin_unlock_irqrestore(&priv->driver_lock, flags); } EXPORT_SYMBOL_GPL(lbs_queue_event); void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx) { if (priv->psstate == PS_STATE_SLEEP) priv->psstate = PS_STATE_AWAKE; /* Swap buffers by flipping the response index */ BUG_ON(resp_idx > 1); priv->resp_idx = resp_idx; wake_up(&priv->waitq); } EXPORT_SYMBOL_GPL(lbs_notify_command_response); static int __init lbs_init_module(void) { memset(&confirm_sleep, 0, sizeof(confirm_sleep)); confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE); confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep)); confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED); lbs_debugfs_init(); return 0; } static void __exit lbs_exit_module(void) { lbs_debugfs_remove(); } module_init(lbs_init_module); module_exit(lbs_exit_module); MODULE_DESCRIPTION("Libertas WLAN Driver Library"); MODULE_AUTHOR("Marvell International Ltd."); MODULE_LICENSE("GPL");