/drivers/net/wireless/libertas/main.c
C | 1296 lines | 905 code | 251 blank | 140 comment | 147 complexity | dada764e147e0d9bc29c5c622ea40391 MD5 | raw file
Possible License(s): CC-BY-SA-3.0, GPL-2.0, LGPL-2.0, AGPL-1.0
- /**
- * This file contains the major functions in WLAN
- * driver. It includes init, exit, open, close and main
- * thread etc..
- */
- #include <linux/moduleparam.h>
- #include <linux/delay.h>
- #include <linux/etherdevice.h>
- #include <linux/netdevice.h>
- #include <linux/if_arp.h>
- #include <linux/kthread.h>
- #include <linux/kfifo.h>
- #include <linux/stddef.h>
- #include <linux/ieee80211.h>
- #include <linux/slab.h>
- #include <net/iw_handler.h>
- #include <net/cfg80211.h>
- #include "host.h"
- #include "decl.h"
- #include "dev.h"
- #include "wext.h"
- #include "cfg.h"
- #include "debugfs.h"
- #include "scan.h"
- #include "assoc.h"
- #include "cmd.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);
- /* 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
- };
- /**
- * @brief use index to get the data rate
- *
- * @param idx The index of data rate
- * @return 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];
- }
- /**
- * @brief use rate to get the index
- *
- * @param rate data rate
- * @return 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;
- }
- static int lbs_add_rtap(struct lbs_private *priv);
- static void lbs_remove_rtap(struct lbs_private *priv);
- /**
- * Get function for sysfs attribute rtap
- */
- static ssize_t lbs_rtap_get(struct device *dev,
- struct device_attribute *attr, char * buf)
- {
- struct lbs_private *priv = to_net_dev(dev)->ml_priv;
- return snprintf(buf, 5, "0x%X\n", priv->monitormode);
- }
- /**
- * Set function for sysfs attribute rtap
- */
- static ssize_t lbs_rtap_set(struct device *dev,
- struct device_attribute *attr, const char * buf, size_t count)
- {
- int monitor_mode;
- struct lbs_private *priv = to_net_dev(dev)->ml_priv;
- sscanf(buf, "%x", &monitor_mode);
- if (monitor_mode) {
- if (priv->monitormode == monitor_mode)
- return strlen(buf);
- if (!priv->monitormode) {
- if (priv->infra_open || lbs_mesh_open(priv))
- return -EBUSY;
- if (priv->mode == IW_MODE_INFRA)
- lbs_cmd_80211_deauthenticate(priv,
- priv->curbssparams.bssid,
- WLAN_REASON_DEAUTH_LEAVING);
- else if (priv->mode == IW_MODE_ADHOC)
- lbs_adhoc_stop(priv);
- lbs_add_rtap(priv);
- }
- priv->monitormode = monitor_mode;
- } else {
- if (!priv->monitormode)
- return strlen(buf);
- priv->monitormode = 0;
- lbs_remove_rtap(priv);
- if (priv->currenttxskb) {
- dev_kfree_skb_any(priv->currenttxskb);
- priv->currenttxskb = NULL;
- }
- /* Wake queues, command thread, etc. */
- lbs_host_to_card_done(priv);
- }
- lbs_prepare_and_send_command(priv,
- CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
- CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
- return strlen(buf);
- }
- /**
- * lbs_rtap attribute to be exported per ethX interface
- * through sysfs (/sys/class/net/ethX/lbs_rtap)
- */
- static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set );
- /**
- * @brief This function opens the ethX interface
- *
- * @param dev A pointer to net_device structure
- * @return 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;
- lbs_deb_enter(LBS_DEB_NET);
- spin_lock_irq(&priv->driver_lock);
- if (priv->monitormode) {
- ret = -EBUSY;
- goto out;
- }
- priv->infra_open = 1;
- if (priv->connect_status == LBS_CONNECTED)
- netif_carrier_on(dev);
- else
- netif_carrier_off(dev);
- if (!priv->tx_pending_len)
- netif_wake_queue(dev);
- out:
- spin_unlock_irq(&priv->driver_lock);
- lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
- return ret;
- }
- /**
- * @brief This function closes the ethX interface
- *
- * @param dev A pointer to net_device structure
- * @return 0
- */
- static int lbs_eth_stop(struct net_device *dev)
- {
- struct lbs_private *priv = dev->ml_priv;
- lbs_deb_enter(LBS_DEB_NET);
- spin_lock_irq(&priv->driver_lock);
- priv->infra_open = 0;
- netif_stop_queue(dev);
- spin_unlock_irq(&priv->driver_lock);
- schedule_work(&priv->mcast_work);
- lbs_deb_leave(LBS_DEB_NET);
- return 0;
- }
- static void lbs_tx_timeout(struct net_device *dev)
- {
- struct lbs_private *priv = dev->ml_priv;
- lbs_deb_enter(LBS_DEB_TX);
- lbs_pr_err("tx watch dog timeout\n");
- dev->trans_start = jiffies;
- if (priv->currenttxskb)
- lbs_send_tx_feedback(priv, 0);
- /* XX: Shouldn't we also call into the hw-specific driver
- to kick it somehow? */
- lbs_host_to_card_done(priv);
- /* More often than not, this actually happens because the
- firmware has crapped itself -- rather than just a very
- busy medium. So send a harmless command, and if/when
- _that_ times out, we'll kick it in the head. */
- lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
- 0, 0, NULL);
- lbs_deb_leave(LBS_DEB_TX);
- }
- void lbs_host_to_card_done(struct lbs_private *priv)
- {
- unsigned long flags;
- lbs_deb_enter(LBS_DEB_THREAD);
- spin_lock_irqsave(&priv->driver_lock, flags);
- 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_interruptible(&priv->waitq);
- }
- spin_unlock_irqrestore(&priv->driver_lock, flags);
- lbs_deb_leave(LBS_DEB_THREAD);
- }
- 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;
- struct cmd_ds_802_11_mac_address cmd;
- lbs_deb_enter(LBS_DEB_NET);
- /* In case it was called from the mesh device */
- dev = priv->dev;
- cmd.hdr.size = cpu_to_le16(sizeof(cmd));
- cmd.action = cpu_to_le16(CMD_ACT_SET);
- memcpy(cmd.macadd, phwaddr->sa_data, 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 done;
- }
- memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
- memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
- if (priv->mesh_dev)
- memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
- done:
- lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
- 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 dev_mc_list *mc_list;
- 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(mc_list, dev) {
- if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) {
- lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
- mc_list->dmi_addr);
- cnt--;
- continue;
- }
- if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
- break;
- memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN);
- lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
- mc_list->dmi_addr);
- i++;
- cnt--;
- }
- netif_addr_unlock_bh(dev);
- if (cnt)
- return -EOVERFLOW;
- return i;
- }
- static void lbs_set_mcast_worker(struct work_struct *work)
- {
- struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
- struct cmd_ds_mac_multicast_adr mcast_cmd;
- int dev_flags;
- int nr_addrs;
- int old_mac_control = priv->mac_control;
- lbs_deb_enter(LBS_DEB_NET);
- dev_flags = priv->dev->flags;
- if (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);
- lbs_deb_leave(LBS_DEB_NET);
- }
- void lbs_set_multicast_list(struct net_device *dev)
- {
- struct lbs_private *priv = dev->ml_priv;
- schedule_work(&priv->mcast_work);
- }
- /**
- * @brief This function 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.
- *
- * @param data A pointer to lbs_thread structure
- * @return 0
- */
- static int lbs_thread(void *data)
- {
- struct net_device *dev = data;
- struct lbs_private *priv = dev->ml_priv;
- wait_queue_t wait;
- lbs_deb_enter(LBS_DEB_THREAD);
- 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;
- lbs_pr_info("Timeout submitting command 0x%04x\n",
- le16_to_cpu(cmdnode->cmdbuf->command));
- lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
- if (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;
- lbs_pr_alert("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);
- /* Wake-up command waiters which can't sleep in
- * lbs_prepare_and_send_command
- */
- if (!list_empty(&priv->cmdpendingq))
- wake_up_all(&priv->cmd_pending);
- 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;
- }
- 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 &&
- lbs_mesh_connected(priv))
- netif_wake_queue(priv->mesh_dev);
- }
- }
- spin_unlock_irq(&priv->driver_lock);
- }
- del_timer(&priv->command_timer);
- del_timer(&priv->auto_deepsleep_timer);
- wake_up_all(&priv->cmd_pending);
- lbs_deb_leave(LBS_DEB_THREAD);
- return 0;
- }
- static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
- struct cmd_header *cmd)
- {
- lbs_deb_enter(LBS_DEB_FW);
- netif_device_detach(priv->dev);
- if (priv->mesh_dev)
- netif_device_detach(priv->mesh_dev);
- priv->fw_ready = 0;
- lbs_deb_leave(LBS_DEB_FW);
- return 0;
- }
- int lbs_suspend(struct lbs_private *priv)
- {
- struct cmd_header cmd;
- int ret;
- lbs_deb_enter(LBS_DEB_FW);
- if (priv->wol_criteria == 0xffffffff) {
- lbs_pr_info("Suspend attempt without configuring wake params!\n");
- return -EINVAL;
- }
- memset(&cmd, 0, sizeof(cmd));
- ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
- sizeof(cmd), lbs_suspend_callback, 0);
- if (ret)
- lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
- lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
- return ret;
- }
- EXPORT_SYMBOL_GPL(lbs_suspend);
- void lbs_resume(struct lbs_private *priv)
- {
- lbs_deb_enter(LBS_DEB_FW);
- priv->fw_ready = 1;
- /* Firmware doesn't seem to give us RX packets any more
- until we send it some command. Might as well update */
- lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
- 0, 0, NULL);
- netif_device_attach(priv->dev);
- if (priv->mesh_dev)
- netif_device_attach(priv->mesh_dev);
- lbs_deb_leave(LBS_DEB_FW);
- }
- EXPORT_SYMBOL_GPL(lbs_resume);
- /**
- * @brief This function gets the HW spec from the firmware and sets
- * some basic parameters.
- *
- * @param priv A pointer to struct lbs_private structure
- * @return 0 or -1
- */
- static int lbs_setup_firmware(struct lbs_private *priv)
- {
- int ret = -1;
- s16 curlevel = 0, minlevel = 0, maxlevel = 0;
- lbs_deb_enter(LBS_DEB_FW);
- /* Read MAC address from firmware */
- memset(priv->current_addr, 0xff, ETH_ALEN);
- 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;
- }
- lbs_set_mac_control(priv);
- done:
- lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
- return ret;
- }
- /**
- * This function handles the timeout of command sending.
- * It will re-send the same command again.
- */
- static void lbs_cmd_timeout_handler(unsigned long data)
- {
- struct lbs_private *priv = (struct lbs_private *)data;
- unsigned long flags;
- lbs_deb_enter(LBS_DEB_CMD);
- spin_lock_irqsave(&priv->driver_lock, flags);
- if (!priv->cur_cmd)
- goto out;
- lbs_pr_info("command 0x%04x timed out\n",
- le16_to_cpu(priv->cur_cmd->cmdbuf->command));
- priv->cmd_timed_out = 1;
- wake_up_interruptible(&priv->waitq);
- out:
- spin_unlock_irqrestore(&priv->driver_lock, flags);
- lbs_deb_leave(LBS_DEB_CMD);
- }
- /**
- * This function put the device back to deep sleep mode when timer expires
- * and no activity (command, event, data etc.) is detected.
- */
- static void auto_deepsleep_timer_fn(unsigned long data)
- {
- struct lbs_private *priv = (struct lbs_private *)data;
- int ret;
- lbs_deb_enter(LBS_DEB_CMD);
- 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)) {
- lbs_deb_main("Entering auto deep sleep mode...\n");
- ret = lbs_prepare_and_send_command(priv,
- CMD_802_11_DEEP_SLEEP, 0,
- 0, 0, NULL);
- if (ret)
- lbs_pr_err("Enter Deep Sleep command failed\n");
- }
- }
- mod_timer(&priv->auto_deepsleep_timer , jiffies +
- (priv->auto_deep_sleep_timeout * HZ)/1000);
- lbs_deb_leave(LBS_DEB_CMD);
- }
- int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
- {
- lbs_deb_enter(LBS_DEB_SDIO);
- 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);
- lbs_deb_leave(LBS_DEB_SDIO);
- return 0;
- }
- int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
- {
- lbs_deb_enter(LBS_DEB_SDIO);
- priv->is_auto_deep_sleep_enabled = 0;
- priv->auto_deep_sleep_timeout = 0;
- del_timer(&priv->auto_deepsleep_timer);
- lbs_deb_leave(LBS_DEB_SDIO);
- return 0;
- }
- static int lbs_init_adapter(struct lbs_private *priv)
- {
- size_t bufsize;
- int i, ret = 0;
- lbs_deb_enter(LBS_DEB_MAIN);
- /* Allocate buffer to store the BSSID list */
- bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
- priv->networks = kzalloc(bufsize, GFP_KERNEL);
- if (!priv->networks) {
- lbs_pr_err("Out of memory allocating beacons\n");
- ret = -1;
- goto out;
- }
- /* Initialize scan result lists */
- INIT_LIST_HEAD(&priv->network_free_list);
- INIT_LIST_HEAD(&priv->network_list);
- for (i = 0; i < MAX_NETWORK_COUNT; i++) {
- list_add_tail(&priv->networks[i].list,
- &priv->network_free_list);
- }
- memset(priv->current_addr, 0xff, ETH_ALEN);
- priv->connect_status = LBS_DISCONNECTED;
- priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
- priv->mode = IW_MODE_INFRA;
- priv->channel = DEFAULT_AD_HOC_CHANNEL;
- priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
- priv->radio_on = 1;
- priv->enablehwauto = 1;
- priv->psmode = LBS802_11POWERMODECAM;
- priv->psstate = PS_STATE_FULL_POWER;
- priv->is_deep_sleep = 0;
- priv->is_auto_deep_sleep_enabled = 0;
- priv->wakeup_dev_required = 0;
- init_waitqueue_head(&priv->ds_awake_q);
- mutex_init(&priv->lock);
- setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
- (unsigned long)priv);
- setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
- (unsigned long)priv);
- INIT_LIST_HEAD(&priv->cmdfreeq);
- INIT_LIST_HEAD(&priv->cmdpendingq);
- spin_lock_init(&priv->driver_lock);
- init_waitqueue_head(&priv->cmd_pending);
- /* Allocate the command buffers */
- if (lbs_allocate_cmd_buffer(priv)) {
- lbs_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) {
- lbs_pr_err("Out of memory allocating event FIFO buffer\n");
- goto out;
- }
- out:
- lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
- return ret;
- }
- static void lbs_free_adapter(struct lbs_private *priv)
- {
- lbs_deb_enter(LBS_DEB_MAIN);
- lbs_free_cmd_buffer(priv);
- kfifo_free(&priv->event_fifo);
- del_timer(&priv->command_timer);
- del_timer(&priv->auto_deepsleep_timer);
- kfree(priv->networks);
- priv->networks = NULL;
- lbs_deb_leave(LBS_DEB_MAIN);
- }
- 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_tx_timeout = lbs_tx_timeout,
- .ndo_set_multicast_list = lbs_set_multicast_list,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_validate_addr = eth_validate_addr,
- };
- /**
- * @brief This function adds the card. it will probe the
- * card, allocate the lbs_priv and initialize the device.
- *
- * @param card A pointer to card
- * @return 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;
- lbs_deb_enter(LBS_DEB_MAIN);
- /* Allocate an Ethernet device and register it */
- wdev = lbs_cfg_alloc(dmdev);
- if (IS_ERR(wdev)) {
- lbs_pr_err("cfg80211 init failed\n");
- goto done;
- }
- /* TODO? */
- wdev->iftype = NL80211_IFTYPE_STATION;
- priv = wdev_priv(wdev);
- priv->wdev = wdev;
- if (lbs_init_adapter(priv)) {
- lbs_pr_err("failed to initialize adapter structure.\n");
- goto err_wdev;
- }
- //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
- dev = alloc_netdev(0, "wlan%d", ether_setup);
- if (!dev) {
- 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;
- #ifdef WIRELESS_EXT
- dev->wireless_handlers = &lbs_handler_def;
- #endif
- dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
- // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
- priv->card = card;
- priv->infra_open = 0;
- priv->rtap_net_dev = NULL;
- 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)) {
- lbs_deb_thread("Error creating main thread.\n");
- goto err_ndev;
- }
- priv->work_thread = create_singlethread_workqueue("lbs_worker");
- INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
- INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
- INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
- priv->wol_criteria = 0xffffffff;
- priv->wol_gpio = 0xff;
- goto done;
- err_ndev:
- free_netdev(dev);
- err_adapter:
- lbs_free_adapter(priv);
- err_wdev:
- lbs_cfg_free(priv);
- priv = NULL;
- done:
- lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
- return priv;
- }
- EXPORT_SYMBOL_GPL(lbs_add_card);
- void lbs_remove_card(struct lbs_private *priv)
- {
- struct net_device *dev = priv->dev;
- lbs_deb_enter(LBS_DEB_MAIN);
- lbs_remove_mesh(priv);
- lbs_remove_rtap(priv);
- dev = priv->dev;
- cancel_delayed_work_sync(&priv->scan_work);
- cancel_delayed_work_sync(&priv->assoc_work);
- cancel_work_sync(&priv->mcast_work);
- /* 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;
- lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
- }
- lbs_send_disconnect_notification(priv);
- if (priv->is_deep_sleep) {
- priv->is_deep_sleep = 0;
- wake_up_interruptible(&priv->ds_awake_q);
- }
- /* Stop the thread servicing the interrupts */
- priv->surpriseremoved = 1;
- kthread_stop(priv->main_thread);
- lbs_free_adapter(priv);
- lbs_cfg_free(priv);
- priv->dev = NULL;
- free_netdev(dev);
- lbs_deb_leave(LBS_DEB_MAIN);
- }
- EXPORT_SYMBOL_GPL(lbs_remove_card);
- static 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 = -1;
- lbs_deb_enter(LBS_DEB_MAIN);
- /* poke the firmware */
- ret = lbs_setup_firmware(priv);
- if (ret)
- goto done;
- if (lbs_cfg_register(priv)) {
- lbs_pr_err("cannot register device\n");
- goto done;
- }
- lbs_update_channel(priv);
- lbs_init_mesh(priv);
- /*
- * While rtap isn't related to mesh, only mesh-enabled
- * firmware implements the rtap functionality via
- * CMD_802_11_MONITOR_MODE.
- */
- if (lbs_rtap_supported(priv)) {
- if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
- lbs_pr_err("cannot register lbs_rtap attribute\n");
- }
- lbs_debugfs_init_one(priv, dev);
- lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
- ret = 0;
- done:
- lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
- return ret;
- }
- EXPORT_SYMBOL_GPL(lbs_start_card);
- void lbs_stop_card(struct lbs_private *priv)
- {
- struct net_device *dev;
- struct cmd_ctrl_node *cmdnode;
- unsigned long flags;
- lbs_deb_enter(LBS_DEB_MAIN);
- if (!priv)
- goto out;
- dev = priv->dev;
- netif_stop_queue(dev);
- netif_carrier_off(dev);
- lbs_debugfs_remove_one(priv);
- lbs_deinit_mesh(priv);
- if (lbs_rtap_supported(priv))
- device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
- /* Delete the timeout of the currently processing command */
- del_timer_sync(&priv->command_timer);
- del_timer_sync(&priv->auto_deepsleep_timer);
- /* Flush pending command nodes */
- spin_lock_irqsave(&priv->driver_lock, flags);
- lbs_deb_main("clearing pending commands\n");
- list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
- cmdnode->result = -ENOENT;
- cmdnode->cmdwaitqwoken = 1;
- wake_up_interruptible(&cmdnode->cmdwait_q);
- }
- /* Flush the command the card is currently processing */
- if (priv->cur_cmd) {
- lbs_deb_main("clearing current command\n");
- priv->cur_cmd->result = -ENOENT;
- priv->cur_cmd->cmdwaitqwoken = 1;
- wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
- }
- lbs_deb_main("done clearing commands\n");
- spin_unlock_irqrestore(&priv->driver_lock, flags);
- unregister_netdev(dev);
- out:
- lbs_deb_leave(LBS_DEB_MAIN);
- }
- EXPORT_SYMBOL_GPL(lbs_stop_card);
- void lbs_queue_event(struct lbs_private *priv, u32 event)
- {
- unsigned long flags;
- lbs_deb_enter(LBS_DEB_THREAD);
- 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_interruptible(&priv->waitq);
- spin_unlock_irqrestore(&priv->driver_lock, flags);
- lbs_deb_leave(LBS_DEB_THREAD);
- }
- EXPORT_SYMBOL_GPL(lbs_queue_event);
- void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
- {
- lbs_deb_enter(LBS_DEB_THREAD);
- 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_interruptible(&priv->waitq);
- lbs_deb_leave(LBS_DEB_THREAD);
- }
- EXPORT_SYMBOL_GPL(lbs_notify_command_response);
- static int __init lbs_init_module(void)
- {
- lbs_deb_enter(LBS_DEB_MAIN);
- 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(CMD_SUBCMD_SLEEP_CONFIRMED);
- lbs_debugfs_init();
- lbs_deb_leave(LBS_DEB_MAIN);
- return 0;
- }
- static void __exit lbs_exit_module(void)
- {
- lbs_deb_enter(LBS_DEB_MAIN);
- lbs_debugfs_remove();
- lbs_deb_leave(LBS_DEB_MAIN);
- }
- /*
- * rtap interface support fuctions
- */
- static int lbs_rtap_open(struct net_device *dev)
- {
- /* Yes, _stop_ the queue. Because we don't support injection */
- lbs_deb_enter(LBS_DEB_MAIN);
- netif_carrier_off(dev);
- netif_stop_queue(dev);
- lbs_deb_leave(LBS_DEB_LEAVE);
- return 0;
- }
- static int lbs_rtap_stop(struct net_device *dev)
- {
- lbs_deb_enter(LBS_DEB_MAIN);
- lbs_deb_leave(LBS_DEB_MAIN);
- return 0;
- }
- static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
- {
- netif_stop_queue(dev);
- return NETDEV_TX_BUSY;
- }
- static void lbs_remove_rtap(struct lbs_private *priv)
- {
- lbs_deb_enter(LBS_DEB_MAIN);
- if (priv->rtap_net_dev == NULL)
- goto out;
- unregister_netdev(priv->rtap_net_dev);
- free_netdev(priv->rtap_net_dev);
- priv->rtap_net_dev = NULL;
- out:
- lbs_deb_leave(LBS_DEB_MAIN);
- }
- static const struct net_device_ops rtap_netdev_ops = {
- .ndo_open = lbs_rtap_open,
- .ndo_stop = lbs_rtap_stop,
- .ndo_start_xmit = lbs_rtap_hard_start_xmit,
- };
- static int lbs_add_rtap(struct lbs_private *priv)
- {
- int ret = 0;
- struct net_device *rtap_dev;
- lbs_deb_enter(LBS_DEB_MAIN);
- if (priv->rtap_net_dev) {
- ret = -EPERM;
- goto out;
- }
- rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
- if (rtap_dev == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
- rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
- rtap_dev->netdev_ops = &rtap_netdev_ops;
- rtap_dev->ml_priv = priv;
- SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
- ret = register_netdev(rtap_dev);
- if (ret) {
- free_netdev(rtap_dev);
- goto out;
- }
- priv->rtap_net_dev = rtap_dev;
- out:
- lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
- return ret;
- }
- module_init(lbs_init_module);
- module_exit(lbs_exit_module);
- MODULE_DESCRIPTION("Libertas WLAN Driver Library");
- MODULE_AUTHOR("Marvell International Ltd.");
- MODULE_LICENSE("GPL");