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-rw-r--r--drivers/net/wireless/mwifiex/main.c1055
1 files changed, 1055 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
new file mode 100644
index 0000000..f058225
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -0,0 +1,1055 @@
+/*
+ * Marvell Wireless LAN device driver: major functions
+ *
+ * Copyright (C) 2011, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "main.h"
+#include "wmm.h"
+#include "cfg80211.h"
+#include "11n.h"
+
+#define VERSION "1.0"
+
+const char driver_version[] = "mwifiex " VERSION " (%s) ";
+
+struct mwifiex_adapter *g_adapter;
+EXPORT_SYMBOL_GPL(g_adapter);
+
+static struct mwifiex_bss_attr mwifiex_bss_sta[] = {
+ {MWIFIEX_BSS_TYPE_STA, MWIFIEX_DATA_FRAME_TYPE_ETH_II, true, 0, 0},
+};
+
+static int drv_mode = DRV_MODE_STA;
+
+static char fw_name[32] = DEFAULT_FW_NAME;
+
+/* Supported drv_mode table */
+static struct mwifiex_drv_mode mwifiex_drv_mode_tbl[] = {
+ {
+ .drv_mode = DRV_MODE_STA,
+ .intf_num = ARRAY_SIZE(mwifiex_bss_sta),
+ .bss_attr = mwifiex_bss_sta,
+ },
+};
+
+/*
+ * This function registers the device and performs all the necessary
+ * initializations.
+ *
+ * The following initialization operations are performed -
+ * - Allocate adapter structure
+ * - Save interface specific operations table in adapter
+ * - Call interface specific initialization routine
+ * - Allocate private structures
+ * - Set default adapter structure parameters
+ * - Initialize locks
+ *
+ * In case of any errors during inittialization, this function also ensures
+ * proper cleanup before exiting.
+ */
+static int mwifiex_register(void *card, struct mwifiex_if_ops *if_ops,
+ struct mwifiex_drv_mode *drv_mode_ptr)
+{
+ struct mwifiex_adapter *adapter;
+ int i;
+
+ adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
+ if (!adapter)
+ return -ENOMEM;
+
+ g_adapter = adapter;
+ adapter->card = card;
+
+ /* Save interface specific operations in adapter */
+ memmove(&adapter->if_ops, if_ops, sizeof(struct mwifiex_if_ops));
+
+ /* card specific initialization has been deferred until now .. */
+ if (adapter->if_ops.init_if(adapter))
+ goto error;
+
+ adapter->priv_num = 0;
+ for (i = 0; i < drv_mode_ptr->intf_num; i++) {
+ adapter->priv[i] = NULL;
+
+ if (!drv_mode_ptr->bss_attr[i].active)
+ continue;
+
+ /* Allocate memory for private structure */
+ adapter->priv[i] = kzalloc(sizeof(struct mwifiex_private),
+ GFP_KERNEL);
+ if (!adapter->priv[i]) {
+ dev_err(adapter->dev, "%s: failed to alloc priv[%d]\n",
+ __func__, i);
+ goto error;
+ }
+
+ adapter->priv_num++;
+ adapter->priv[i]->adapter = adapter;
+ /* Save bss_type, frame_type & bss_priority */
+ adapter->priv[i]->bss_type = drv_mode_ptr->bss_attr[i].bss_type;
+ adapter->priv[i]->frame_type =
+ drv_mode_ptr->bss_attr[i].frame_type;
+ adapter->priv[i]->bss_priority =
+ drv_mode_ptr->bss_attr[i].bss_priority;
+
+ if (drv_mode_ptr->bss_attr[i].bss_type == MWIFIEX_BSS_TYPE_STA)
+ adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_STA;
+ else if (drv_mode_ptr->bss_attr[i].bss_type ==
+ MWIFIEX_BSS_TYPE_UAP)
+ adapter->priv[i]->bss_role = MWIFIEX_BSS_ROLE_UAP;
+
+ /* Save bss_index & bss_num */
+ adapter->priv[i]->bss_index = i;
+ adapter->priv[i]->bss_num = drv_mode_ptr->bss_attr[i].bss_num;
+ }
+ adapter->drv_mode = drv_mode_ptr;
+
+ if (mwifiex_init_lock_list(adapter))
+ goto error;
+
+ init_timer(&adapter->cmd_timer);
+ adapter->cmd_timer.function = mwifiex_cmd_timeout_func;
+ adapter->cmd_timer.data = (unsigned long) adapter;
+
+ return 0;
+
+error:
+ dev_dbg(adapter->dev, "info: leave mwifiex_register with error\n");
+
+ mwifiex_free_lock_list(adapter);
+ for (i = 0; i < drv_mode_ptr->intf_num; i++)
+ kfree(adapter->priv[i]);
+ kfree(adapter);
+
+ return -1;
+}
+
+/*
+ * This function unregisters the device and performs all the necessary
+ * cleanups.
+ *
+ * The following cleanup operations are performed -
+ * - Free the timers
+ * - Free beacon buffers
+ * - Free private structures
+ * - Free adapter structure
+ */
+static int mwifiex_unregister(struct mwifiex_adapter *adapter)
+{
+ s32 i;
+
+ del_timer(&adapter->cmd_timer);
+
+ /* Free private structures */
+ for (i = 0; i < adapter->priv_num; i++) {
+ if (adapter->priv[i]) {
+ mwifiex_free_curr_bcn(adapter->priv[i]);
+ kfree(adapter->priv[i]);
+ }
+ }
+
+ kfree(adapter);
+ return 0;
+}
+
+/*
+ * The main process.
+ *
+ * This function is the main procedure of the driver and handles various driver
+ * operations. It runs in a loop and provides the core functionalities.
+ *
+ * The main responsibilities of this function are -
+ * - Ensure concurrency control
+ * - Handle pending interrupts and call interrupt handlers
+ * - Wake up the card if required
+ * - Handle command responses and call response handlers
+ * - Handle events and call event handlers
+ * - Execute pending commands
+ * - Transmit pending data packets
+ */
+int mwifiex_main_process(struct mwifiex_adapter *adapter)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&adapter->main_proc_lock, flags);
+
+ /* Check if already processing */
+ if (adapter->mwifiex_processing) {
+ spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
+ goto exit_main_proc;
+ } else {
+ adapter->mwifiex_processing = true;
+ spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
+ }
+process_start:
+ do {
+ if ((adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING) ||
+ (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY))
+ break;
+
+ /* Handle pending interrupt if any */
+ if (adapter->int_status) {
+ if (adapter->hs_activated)
+ mwifiex_process_hs_config(adapter);
+ adapter->if_ops.process_int_status(adapter);
+ }
+
+ /* Need to wake up the card ? */
+ if ((adapter->ps_state == PS_STATE_SLEEP) &&
+ (adapter->pm_wakeup_card_req &&
+ !adapter->pm_wakeup_fw_try) &&
+ (is_command_pending(adapter)
+ || !mwifiex_wmm_lists_empty(adapter))) {
+ adapter->pm_wakeup_fw_try = true;
+ adapter->if_ops.wakeup(adapter);
+ continue;
+ }
+ if (IS_CARD_RX_RCVD(adapter)) {
+ adapter->pm_wakeup_fw_try = false;
+ if (adapter->ps_state == PS_STATE_SLEEP)
+ adapter->ps_state = PS_STATE_AWAKE;
+ } else {
+ /* We have tried to wakeup the card already */
+ if (adapter->pm_wakeup_fw_try)
+ break;
+ if (adapter->ps_state != PS_STATE_AWAKE ||
+ adapter->tx_lock_flag)
+ break;
+
+ if (adapter->scan_processing || adapter->data_sent
+ || mwifiex_wmm_lists_empty(adapter)) {
+ if (adapter->cmd_sent || adapter->curr_cmd
+ || (!is_command_pending(adapter)))
+ break;
+ }
+ }
+
+ /* Check for Cmd Resp */
+ if (adapter->cmd_resp_received) {
+ adapter->cmd_resp_received = false;
+ mwifiex_process_cmdresp(adapter);
+
+ /* call mwifiex back when init_fw is done */
+ if (adapter->hw_status == MWIFIEX_HW_STATUS_INIT_DONE) {
+ adapter->hw_status = MWIFIEX_HW_STATUS_READY;
+ mwifiex_init_fw_complete(adapter);
+ }
+ }
+
+ /* Check for event */
+ if (adapter->event_received) {
+ adapter->event_received = false;
+ mwifiex_process_event(adapter);
+ }
+
+ /* Check if we need to confirm Sleep Request
+ received previously */
+ if (adapter->ps_state == PS_STATE_PRE_SLEEP) {
+ if (!adapter->cmd_sent && !adapter->curr_cmd)
+ mwifiex_check_ps_cond(adapter);
+ }
+
+ /* * The ps_state may have been changed during processing of
+ * Sleep Request event.
+ */
+ if ((adapter->ps_state == PS_STATE_SLEEP)
+ || (adapter->ps_state == PS_STATE_PRE_SLEEP)
+ || (adapter->ps_state == PS_STATE_SLEEP_CFM)
+ || adapter->tx_lock_flag)
+ continue;
+
+ if (!adapter->cmd_sent && !adapter->curr_cmd) {
+ if (mwifiex_exec_next_cmd(adapter) == -1) {
+ ret = -1;
+ break;
+ }
+ }
+
+ if (!adapter->scan_processing && !adapter->data_sent &&
+ !mwifiex_wmm_lists_empty(adapter)) {
+ mwifiex_wmm_process_tx(adapter);
+ if (adapter->hs_activated) {
+ adapter->is_hs_configured = false;
+ mwifiex_hs_activated_event
+ (mwifiex_get_priv
+ (adapter, MWIFIEX_BSS_ROLE_ANY),
+ false);
+ }
+ }
+
+ if (adapter->delay_null_pkt && !adapter->cmd_sent &&
+ !adapter->curr_cmd && !is_command_pending(adapter)
+ && mwifiex_wmm_lists_empty(adapter)) {
+ if (!mwifiex_send_null_packet
+ (mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
+ MWIFIEX_TxPD_POWER_MGMT_NULL_PACKET |
+ MWIFIEX_TxPD_POWER_MGMT_LAST_PACKET)) {
+ adapter->delay_null_pkt = false;
+ adapter->ps_state = PS_STATE_SLEEP;
+ }
+ break;
+ }
+ } while (true);
+
+ if ((adapter->int_status) || IS_CARD_RX_RCVD(adapter))
+ goto process_start;
+
+ spin_lock_irqsave(&adapter->main_proc_lock, flags);
+ adapter->mwifiex_processing = false;
+ spin_unlock_irqrestore(&adapter->main_proc_lock, flags);
+
+exit_main_proc:
+ if (adapter->hw_status == MWIFIEX_HW_STATUS_CLOSING)
+ mwifiex_shutdown_drv(adapter);
+ return ret;
+}
+
+/*
+ * This function initializes the software.
+ *
+ * The main work includes allocating and initializing the adapter structure
+ * and initializing the private structures.
+ */
+static int
+mwifiex_init_sw(void *card, struct mwifiex_if_ops *if_ops)
+{
+ int i;
+ struct mwifiex_drv_mode *drv_mode_ptr;
+
+ /* find mwifiex_drv_mode entry from mwifiex_drv_mode_tbl */
+ drv_mode_ptr = NULL;
+ for (i = 0; i < ARRAY_SIZE(mwifiex_drv_mode_tbl); i++) {
+ if (mwifiex_drv_mode_tbl[i].drv_mode == drv_mode) {
+ drv_mode_ptr = &mwifiex_drv_mode_tbl[i];
+ break;
+ }
+ }
+
+ if (!drv_mode_ptr) {
+ pr_err("invalid drv_mode=%d\n", drv_mode);
+ return -1;
+ }
+
+ if (mwifiex_register(card, if_ops, drv_mode_ptr))
+ return -1;
+
+ return 0;
+}
+
+/*
+ * 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 initializes the hardware and firmware.
+ *
+ * The main initialization steps followed are -
+ * - Download the correct firmware to card
+ * - Allocate and initialize the adapter structure
+ * - Initialize the private structures
+ * - Issue the init commands to firmware
+ */
+static int mwifiex_init_hw_fw(struct mwifiex_adapter *adapter)
+{
+ int ret, err;
+ struct mwifiex_fw_image fw;
+
+ memset(&fw, 0, sizeof(struct mwifiex_fw_image));
+
+ switch (adapter->revision_id) {
+ case SD8787_W0:
+ case SD8787_W1:
+ strcpy(fw_name, SD8787_W1_FW_NAME);
+ break;
+ case SD8787_A0:
+ case SD8787_A1:
+ strcpy(fw_name, SD8787_AX_FW_NAME);
+ break;
+ default:
+ break;
+ }
+
+ err = request_firmware(&adapter->firmware, fw_name, adapter->dev);
+ if (err < 0) {
+ dev_err(adapter->dev, "request_firmware() returned"
+ " error code %#x\n", err);
+ ret = -1;
+ goto done;
+ }
+ fw.fw_buf = (u8 *) adapter->firmware->data;
+ fw.fw_len = adapter->firmware->size;
+
+ ret = mwifiex_dnld_fw(adapter, &fw);
+ if (ret == -1)
+ goto done;
+
+ dev_notice(adapter->dev, "WLAN FW is active\n");
+
+ adapter->init_wait_q_woken = false;
+ ret = mwifiex_init_fw(adapter);
+ if (ret == -1) {
+ goto done;
+ } else if (!ret) {
+ adapter->hw_status = MWIFIEX_HW_STATUS_READY;
+ goto done;
+ }
+ /* Wait for mwifiex_init to complete */
+ wait_event_interruptible(adapter->init_wait_q,
+ adapter->init_wait_q_woken);
+ if (adapter->hw_status != MWIFIEX_HW_STATUS_READY) {
+ ret = -1;
+ goto done;
+ }
+ ret = 0;
+
+done:
+ if (adapter->firmware)
+ release_firmware(adapter->firmware);
+ if (ret)
+ ret = -1;
+ return ret;
+}
+
+/*
+ * This function fills a driver buffer.
+ *
+ * The function associates a given SKB with the provided driver buffer
+ * and also updates some of the SKB parameters, including IP header,
+ * priority and timestamp.
+ */
+static void
+mwifiex_fill_buffer(struct sk_buff *skb)
+{
+ struct ethhdr *eth;
+ struct iphdr *iph;
+ struct timeval tv;
+ u8 tid = 0;
+
+ eth = (struct ethhdr *) skb->data;
+ switch (eth->h_proto) {
+ case __constant_htons(ETH_P_IP):
+ iph = ip_hdr(skb);
+ tid = IPTOS_PREC(iph->tos);
+ pr_debug("data: packet type ETH_P_IP: %04x, tid=%#x prio=%#x\n",
+ eth->h_proto, tid, skb->priority);
+ break;
+ case __constant_htons(ETH_P_ARP):
+ pr_debug("data: ARP packet: %04x\n", eth->h_proto);
+ default:
+ break;
+ }
+/* Offset for TOS field in the IP header */
+#define IPTOS_OFFSET 5
+ tid = (tid >> IPTOS_OFFSET);
+ skb->priority = tid;
+ /* Record the current time the packet was queued; used to
+ determine the amount of time the packet was queued in
+ the driver before it was sent to the firmware.
+ The delay is then sent along with the packet to the
+ firmware for aggregate delay calculation for stats and
+ MSDU lifetime expiry.
+ */
+ do_gettimeofday(&tv);
+ skb->tstamp = timeval_to_ktime(tv);
+}
+
+/*
+ * CFG802.11 network device handler for open.
+ *
+ * Starts the data queue.
+ */
+static int
+mwifiex_open(struct net_device *dev)
+{
+ netif_start_queue(dev);
+ return 0;
+}
+
+/*
+ * CFG802.11 network device handler for close.
+ */
+static int
+mwifiex_close(struct net_device *dev)
+{
+ return 0;
+}
+
+/*
+ * CFG802.11 network device handler for data transmission.
+ */
+static int
+mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+ struct sk_buff *new_skb;
+ struct mwifiex_txinfo *tx_info;
+
+ dev_dbg(priv->adapter->dev, "data: %lu BSS(%d): Data <= kernel\n",
+ jiffies, priv->bss_index);
+
+ if (priv->adapter->surprise_removed) {
+ kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
+ dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
+ kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
+ dev_dbg(priv->adapter->dev,
+ "data: Tx: insufficient skb headroom %d\n",
+ skb_headroom(skb));
+ /* Insufficient skb headroom - allocate a new skb */
+ new_skb =
+ skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
+ if (unlikely(!new_skb)) {
+ dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
+ kfree_skb(skb);
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ kfree_skb(skb);
+ skb = new_skb;
+ dev_dbg(priv->adapter->dev, "info: new skb headroomd %d\n",
+ skb_headroom(skb));
+ }
+
+ tx_info = MWIFIEX_SKB_TXCB(skb);
+ tx_info->bss_index = priv->bss_index;
+ mwifiex_fill_buffer(skb);
+
+ mwifiex_wmm_add_buf_txqueue(priv->adapter, skb);
+ atomic_inc(&priv->adapter->tx_pending);
+
+ if (atomic_read(&priv->adapter->tx_pending) >= MAX_TX_PENDING) {
+ netif_stop_queue(priv->netdev);
+ dev->trans_start = jiffies;
+ }
+
+ queue_work(priv->adapter->workqueue, &priv->adapter->main_work);
+
+ return 0;
+}
+
+/*
+ * CFG802.11 network device handler for setting MAC address.
+ */
+static int
+mwifiex_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+ struct sockaddr *hw_addr = (struct sockaddr *) addr;
+ int ret;
+
+ memcpy(priv->curr_addr, hw_addr->sa_data, ETH_ALEN);
+
+ /* Send request to firmware */
+ ret = mwifiex_send_cmd_sync(priv, HostCmd_CMD_802_11_MAC_ADDRESS,
+ HostCmd_ACT_GEN_SET, 0, NULL);
+
+ if (!ret)
+ memcpy(priv->netdev->dev_addr, priv->curr_addr, ETH_ALEN);
+ else
+ dev_err(priv->adapter->dev, "set mac address failed: ret=%d"
+ "\n", ret);
+
+ memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
+
+ return ret;
+}
+
+/*
+ * CFG802.11 network device handler for setting multicast list.
+ */
+static void mwifiex_set_multicast_list(struct net_device *dev)
+{
+ struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+ struct mwifiex_multicast_list mcast_list;
+
+ if (dev->flags & IFF_PROMISC) {
+ mcast_list.mode = MWIFIEX_PROMISC_MODE;
+ } else if (dev->flags & IFF_ALLMULTI ||
+ netdev_mc_count(dev) > MWIFIEX_MAX_MULTICAST_LIST_SIZE) {
+ mcast_list.mode = MWIFIEX_ALL_MULTI_MODE;
+ } else {
+ mcast_list.mode = MWIFIEX_MULTICAST_MODE;
+ if (netdev_mc_count(dev))
+ mcast_list.num_multicast_addr =
+ mwifiex_copy_mcast_addr(&mcast_list, dev);
+ }
+ mwifiex_request_set_multicast_list(priv, &mcast_list);
+}
+
+/*
+ * CFG802.11 network device handler for transmission timeout.
+ */
+static void
+mwifiex_tx_timeout(struct net_device *dev)
+{
+ struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+
+ dev_err(priv->adapter->dev, "%lu : Tx timeout, bss_index=%d\n",
+ jiffies, priv->bss_index);
+ dev->trans_start = jiffies;
+ priv->num_tx_timeout++;
+}
+
+/*
+ * CFG802.11 network device handler for statistics retrieval.
+ */
+static struct net_device_stats *mwifiex_get_stats(struct net_device *dev)
+{
+ struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
+
+ return &priv->stats;
+}
+
+/* Network device handlers */
+static const struct net_device_ops mwifiex_netdev_ops = {
+ .ndo_open = mwifiex_open,
+ .ndo_stop = mwifiex_close,
+ .ndo_start_xmit = mwifiex_hard_start_xmit,
+ .ndo_set_mac_address = mwifiex_set_mac_address,
+ .ndo_tx_timeout = mwifiex_tx_timeout,
+ .ndo_get_stats = mwifiex_get_stats,
+ .ndo_set_multicast_list = mwifiex_set_multicast_list,
+};
+
+/*
+ * This function initializes the private structure parameters.
+ *
+ * The following wait queues are initialized -
+ * - IOCTL wait queue
+ * - Command wait queue
+ * - Statistics wait queue
+ *
+ * ...and the following default parameters are set -
+ * - Current key index : Set to 0
+ * - Rate index : Set to auto
+ * - Media connected : Set to disconnected
+ * - Adhoc link sensed : Set to false
+ * - Nick name : Set to null
+ * - Number of Tx timeout : Set to 0
+ * - Device address : Set to current address
+ *
+ * In addition, the CFG80211 work queue is also created.
+ */
+static void
+mwifiex_init_priv_params(struct mwifiex_private *priv, struct net_device *dev)
+{
+ dev->netdev_ops = &mwifiex_netdev_ops;
+ /* Initialize private structure */
+ priv->current_key_index = 0;
+ priv->media_connected = false;
+ memset(&priv->nick_name, 0, sizeof(priv->nick_name));
+ priv->num_tx_timeout = 0;
+ priv->workqueue = create_singlethread_workqueue("cfg80211_wq");
+ INIT_WORK(&priv->cfg_workqueue, mwifiex_cfg80211_results);
+ memcpy(dev->dev_addr, priv->curr_addr, ETH_ALEN);
+}
+
+/*
+ * This function adds a new logical interface.
+ *
+ * It allocates, initializes and registers the interface by performing
+ * the following opearations -
+ * - Allocate a new net device structure
+ * - Assign device name
+ * - Register the new device with CFG80211 subsystem
+ * - Initialize semaphore and private structure
+ * - Register the new device with kernel
+ * - Create the complete debug FS structure if configured
+ */
+static struct mwifiex_private *mwifiex_add_interface(
+ struct mwifiex_adapter *adapter,
+ u8 bss_index, u8 bss_type)
+{
+ struct net_device *dev;
+ struct mwifiex_private *priv;
+ void *mdev_priv;
+
+ dev = alloc_netdev_mq(sizeof(struct mwifiex_private *), "mlan%d",
+ ether_setup, 1);
+ if (!dev) {
+ dev_err(adapter->dev, "no memory available for netdevice\n");
+ goto error;
+ }
+
+ if (mwifiex_register_cfg80211(dev, adapter->priv[bss_index]->curr_addr,
+ adapter->priv[bss_index]) != 0) {
+ dev_err(adapter->dev, "cannot register netdevice with cfg80211\n");
+ goto error;
+ }
+ /* Save the priv pointer in netdev */
+ priv = adapter->priv[bss_index];
+ mdev_priv = netdev_priv(dev);
+ *((unsigned long *) mdev_priv) = (unsigned long) priv;
+
+ priv->netdev = dev;
+
+ sema_init(&priv->async_sem, 1);
+ priv->scan_pending_on_block = false;
+
+ mwifiex_init_priv_params(priv, dev);
+
+ SET_NETDEV_DEV(dev, adapter->dev);
+
+ /* Register network device */
+ if (register_netdev(dev)) {
+ dev_err(adapter->dev, "cannot register virtual network device\n");
+ goto error;
+ }
+
+ dev_dbg(adapter->dev, "info: %s: Marvell 802.11 Adapter\n", dev->name);
+#ifdef CONFIG_DEBUG_FS
+ mwifiex_dev_debugfs_init(priv);
+#endif
+ return priv;
+error:
+ if (dev)
+ free_netdev(dev);
+ return NULL;
+}
+
+/*
+ * This function removes a logical interface.
+ *
+ * It deregisters, resets and frees the interface by performing
+ * the following operations -
+ * - Disconnect the device if connected, send wireless event to
+ * notify applications.
+ * - Remove the debug FS structure if configured
+ * - Unregister the device from kernel
+ * - Free the net device structure
+ * - Cancel all works and destroy work queue
+ * - Unregister and free the wireless device from CFG80211 subsystem
+ */
+static void
+mwifiex_remove_interface(struct mwifiex_adapter *adapter, u8 bss_index)
+{
+ struct net_device *dev;
+ struct mwifiex_private *priv = adapter->priv[bss_index];
+
+ if (!priv)
+ return;
+ dev = priv->netdev;
+
+ if (priv->media_connected)
+ priv->media_connected = false;
+
+#ifdef CONFIG_DEBUG_FS
+ mwifiex_dev_debugfs_remove(priv);
+#endif
+ /* Last reference is our one */
+ dev_dbg(adapter->dev, "info: %s: refcnt = %d\n",
+ dev->name, netdev_refcnt_read(dev));
+
+ if (dev->reg_state == NETREG_REGISTERED)
+ unregister_netdev(dev);
+
+ /* Clear the priv in adapter */
+ priv->netdev = NULL;
+ if (dev)
+ free_netdev(dev);
+
+ cancel_work_sync(&priv->cfg_workqueue);
+ flush_workqueue(priv->workqueue);
+ destroy_workqueue(priv->workqueue);
+ wiphy_unregister(priv->wdev->wiphy);
+ wiphy_free(priv->wdev->wiphy);
+ kfree(priv->wdev);
+}
+
+/*
+ * This function check if command is pending.
+ */
+int is_command_pending(struct mwifiex_adapter *adapter)
+{
+ unsigned long flags;
+ int is_cmd_pend_q_empty;
+
+ spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
+ is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
+ spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
+
+ return !is_cmd_pend_q_empty;
+}
+
+/*
+ * This function returns the correct private structure pointer based
+ * upon the BSS number.
+ */
+struct mwifiex_private *
+mwifiex_bss_index_to_priv(struct mwifiex_adapter *adapter, u8 bss_index)
+{
+ if (!adapter || (bss_index >= adapter->priv_num))
+ return NULL;
+ return adapter->priv[bss_index];
+}
+
+/*
+ * This is the main work queue function.
+ *
+ * It handles the main process, which in turn handles the complete
+ * driver operations.
+ */
+static void mwifiex_main_work_queue(struct work_struct *work)
+{
+ struct mwifiex_adapter *adapter =
+ container_of(work, struct mwifiex_adapter, main_work);
+
+ if (adapter->surprise_removed)
+ return;
+ mwifiex_main_process(adapter);
+}
+
+/*
+ * This function cancels all works in the queue and destroys
+ * the main workqueue.
+ */
+static void
+mwifiex_terminate_workqueue(struct mwifiex_adapter *adapter)
+{
+ flush_workqueue(adapter->workqueue);
+ destroy_workqueue(adapter->workqueue);
+ adapter->workqueue = NULL;
+}
+
+/*
+ * This function adds the card.
+ *
+ * This function follows the following major steps to set up the device -
+ * - Initialize software. This includes probing the card, registering
+ * the interface operations table, and allocating/initializing the
+ * adapter structure
+ * - Set up the netlink socket
+ * - Create and start the main work queue
+ * - Register the device
+ * - Initialize firmware and hardware
+ * - Add logical interfaces
+ */
+int
+mwifiex_add_card(void *card, struct semaphore *sem,
+ struct mwifiex_if_ops *if_ops)
+{
+ int i;
+ struct mwifiex_adapter *adapter;
+
+ if (down_interruptible(sem))
+ goto exit_sem_err;
+
+ if (mwifiex_init_sw(card, if_ops)) {
+ pr_err("%s: software init failed\n", __func__);
+ goto err_init_sw;
+ }
+
+ adapter = g_adapter;
+
+ adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
+ adapter->surprise_removed = false;
+ init_waitqueue_head(&adapter->init_wait_q);
+ adapter->is_suspended = false;
+ adapter->hs_activated = false;
+ init_waitqueue_head(&adapter->hs_activate_wait_q);
+ adapter->cmd_wait_q_required = false;
+ init_waitqueue_head(&adapter->cmd_wait_q.wait);
+ adapter->cmd_wait_q.condition = false;
+ adapter->cmd_wait_q.status = 0;
+
+ adapter->workqueue = create_workqueue("MWIFIEX_WORK_QUEUE");
+ if (!adapter->workqueue)
+ goto err_kmalloc;
+
+ INIT_WORK(&adapter->main_work, mwifiex_main_work_queue);
+
+ /* Register the device. Fill up the private data structure with relevant
+ information from the card and request for the required IRQ. */
+ if (adapter->if_ops.register_dev(adapter)) {
+ pr_err("%s: failed to register mwifiex device\n", __func__);
+ goto err_registerdev;
+ }
+
+ if (mwifiex_init_hw_fw(adapter)) {
+ pr_err("%s: firmware init failed\n", __func__);
+ goto err_init_fw;
+ }
+
+ /* Add interfaces */
+ for (i = 0; i < adapter->drv_mode->intf_num; i++) {
+ if (!mwifiex_add_interface(adapter, i,
+ adapter->drv_mode->bss_attr[i].bss_type)) {
+ goto err_add_intf;
+ }
+ }
+
+ up(sem);
+
+ return 0;
+
+err_add_intf:
+ for (i = 0; i < adapter->priv_num; i++)
+ mwifiex_remove_interface(adapter, i);
+err_init_fw:
+ pr_debug("info: %s: unregister device\n", __func__);
+ adapter->if_ops.unregister_dev(adapter);
+err_registerdev:
+ adapter->surprise_removed = true;
+ mwifiex_terminate_workqueue(adapter);
+err_kmalloc:
+ if ((adapter->hw_status == MWIFIEX_HW_STATUS_FW_READY) ||
+ (adapter->hw_status == MWIFIEX_HW_STATUS_READY)) {
+ pr_debug("info: %s: shutdown mwifiex\n", __func__);
+ adapter->init_wait_q_woken = false;
+
+ if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
+ wait_event_interruptible(adapter->init_wait_q,
+ adapter->init_wait_q_woken);
+ }
+
+ mwifiex_free_adapter(adapter);
+
+err_init_sw:
+ up(sem);
+
+exit_sem_err:
+ return -1;
+}
+EXPORT_SYMBOL_GPL(mwifiex_add_card);
+
+/*
+ * This function removes the card.
+ *
+ * This function follows the following major steps to remove the device -
+ * - Stop data traffic
+ * - Shutdown firmware
+ * - Remove the logical interfaces
+ * - Terminate the work queue
+ * - Unregister the device
+ * - Free the adapter structure
+ */
+int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
+{
+ struct mwifiex_private *priv = NULL;
+ int i;
+
+ if (down_interruptible(sem))
+ goto exit_sem_err;
+
+ if (!adapter)
+ goto exit_remove;
+
+ adapter->surprise_removed = true;
+
+ /* Stop data */
+ for (i = 0; i < adapter->priv_num; i++) {
+ priv = adapter->priv[i];
+ if (priv) {
+ if (!netif_queue_stopped(priv->netdev))
+ netif_stop_queue(priv->netdev);
+ if (netif_carrier_ok(priv->netdev))
+ netif_carrier_off(priv->netdev);
+ }
+ }
+
+ dev_dbg(adapter->dev, "cmd: calling mwifiex_shutdown_drv...\n");
+ adapter->init_wait_q_woken = false;
+
+ if (mwifiex_shutdown_drv(adapter) == -EINPROGRESS)
+ wait_event_interruptible(adapter->init_wait_q,
+ adapter->init_wait_q_woken);
+ dev_dbg(adapter->dev, "cmd: mwifiex_shutdown_drv done\n");
+ if (atomic_read(&adapter->rx_pending) ||
+ atomic_read(&adapter->tx_pending) ||
+ atomic_read(&adapter->cmd_pending)) {
+ dev_err(adapter->dev, "rx_pending=%d, tx_pending=%d, "
+ "cmd_pending=%d\n",
+ atomic_read(&adapter->rx_pending),
+ atomic_read(&adapter->tx_pending),
+ atomic_read(&adapter->cmd_pending));
+ }
+
+ /* Remove interface */
+ for (i = 0; i < adapter->priv_num; i++)
+ mwifiex_remove_interface(adapter, i);
+
+ mwifiex_terminate_workqueue(adapter);
+
+ /* Unregister device */
+ dev_dbg(adapter->dev, "info: unregister device\n");
+ adapter->if_ops.unregister_dev(adapter);
+ /* Free adapter structure */
+ dev_dbg(adapter->dev, "info: free adapter\n");
+ mwifiex_free_adapter(adapter);
+
+exit_remove:
+ up(sem);
+exit_sem_err:
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mwifiex_remove_card);
+
+/*
+ * This function initializes the module.
+ *
+ * The debug FS is also initialized if configured.
+ */
+static int
+mwifiex_init_module(void)
+{
+#ifdef CONFIG_DEBUG_FS
+ mwifiex_debugfs_init();
+#endif
+ return 0;
+}
+
+/*
+ * This function cleans up the module.
+ *
+ * The debug FS is removed if available.
+ */
+static void
+mwifiex_cleanup_module(void)
+{
+#ifdef CONFIG_DEBUG_FS
+ mwifiex_debugfs_remove();
+#endif
+}
+
+module_init(mwifiex_init_module);
+module_exit(mwifiex_cleanup_module);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("Marvell WiFi-Ex Driver version " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL v2");
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