| /** |
| * This file contains the handling of command |
| * responses as well as events generated by firmware. |
| */ |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/sched.h> |
| #include <asm/unaligned.h> |
| #include <net/cfg80211.h> |
| |
| #include "cfg.h" |
| #include "cmd.h" |
| |
| /** |
| * @brief This function handles disconnect event. it |
| * reports disconnect to upper layer, clean tx/rx packets, |
| * reset link state etc. |
| * |
| * @param priv A pointer to struct lbs_private structure |
| * @return n/a |
| */ |
| void lbs_mac_event_disconnected(struct lbs_private *priv) |
| { |
| if (priv->connect_status != LBS_CONNECTED) |
| return; |
| |
| lbs_deb_enter(LBS_DEB_ASSOC); |
| |
| /* |
| * Cisco AP sends EAP failure and de-auth in less than 0.5 ms. |
| * It causes problem in the Supplicant |
| */ |
| msleep_interruptible(1000); |
| |
| if (priv->wdev->iftype == NL80211_IFTYPE_STATION) |
| lbs_send_disconnect_notification(priv); |
| |
| /* report disconnect to upper layer */ |
| netif_stop_queue(priv->dev); |
| netif_carrier_off(priv->dev); |
| |
| /* Free Tx and Rx packets */ |
| kfree_skb(priv->currenttxskb); |
| priv->currenttxskb = NULL; |
| priv->tx_pending_len = 0; |
| |
| priv->connect_status = LBS_DISCONNECTED; |
| |
| if (priv->psstate != PS_STATE_FULL_POWER) { |
| /* make firmware to exit PS mode */ |
| lbs_deb_cmd("disconnected, so exit PS mode\n"); |
| lbs_ps_wakeup(priv, 0); |
| } |
| lbs_deb_leave(LBS_DEB_ASSOC); |
| } |
| |
| static inline int handle_cmd_response(struct lbs_private *priv, |
| struct cmd_header *cmd_response) |
| { |
| struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response; |
| int ret = 0; |
| uint16_t respcmd = le16_to_cpu(resp->command); |
| |
| lbs_deb_enter(LBS_DEB_HOST); |
| |
| switch (respcmd) { |
| case CMD_RET(CMD_802_11_BEACON_STOP): |
| break; |
| |
| default: |
| lbs_pr_err("CMD_RESP: unknown cmd response 0x%04x\n", |
| le16_to_cpu(resp->command)); |
| break; |
| } |
| lbs_deb_leave(LBS_DEB_HOST); |
| return ret; |
| } |
| |
| int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len) |
| { |
| uint16_t respcmd, curcmd; |
| struct cmd_header *resp; |
| int ret = 0; |
| unsigned long flags; |
| uint16_t result; |
| |
| lbs_deb_enter(LBS_DEB_HOST); |
| |
| mutex_lock(&priv->lock); |
| spin_lock_irqsave(&priv->driver_lock, flags); |
| |
| if (!priv->cur_cmd) { |
| lbs_deb_host("CMD_RESP: cur_cmd is NULL\n"); |
| ret = -1; |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| goto done; |
| } |
| |
| resp = (void *)data; |
| curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command); |
| respcmd = le16_to_cpu(resp->command); |
| result = le16_to_cpu(resp->result); |
| |
| lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n", |
| respcmd, le16_to_cpu(resp->seqnum), len); |
| lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len); |
| |
| if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) { |
| lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n", |
| le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum)); |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| ret = -1; |
| goto done; |
| } |
| if (respcmd != CMD_RET(curcmd) && |
| respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) { |
| lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd); |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| ret = -1; |
| goto done; |
| } |
| |
| if (resp->result == cpu_to_le16(0x0004)) { |
| /* 0x0004 means -EAGAIN. Drop the response, let it time out |
| and be resubmitted */ |
| lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n", |
| le16_to_cpu(resp->command)); |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| ret = -1; |
| goto done; |
| } |
| |
| /* Now we got response from FW, cancel the command timer */ |
| del_timer(&priv->command_timer); |
| priv->cmd_timed_out = 0; |
| |
| /* Store the response code to cur_cmd_retcode. */ |
| priv->cur_cmd_retcode = result; |
| |
| if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) { |
| struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1]; |
| u16 action = le16_to_cpu(psmode->action); |
| |
| lbs_deb_host( |
| "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n", |
| result, action); |
| |
| if (result) { |
| lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n", |
| result); |
| /* |
| * We should not re-try enter-ps command in |
| * ad-hoc mode. It takes place in |
| * lbs_execute_next_command(). |
| */ |
| if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR && |
| action == CMD_SUBCMD_ENTER_PS) |
| priv->psmode = LBS802_11POWERMODECAM; |
| } else if (action == CMD_SUBCMD_ENTER_PS) { |
| priv->needtowakeup = 0; |
| priv->psstate = PS_STATE_AWAKE; |
| |
| lbs_deb_host("CMD_RESP: ENTER_PS command response\n"); |
| if (priv->connect_status != LBS_CONNECTED) { |
| /* |
| * When Deauth Event received before Enter_PS command |
| * response, We need to wake up the firmware. |
| */ |
| lbs_deb_host( |
| "disconnected, invoking lbs_ps_wakeup\n"); |
| |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| mutex_unlock(&priv->lock); |
| lbs_ps_wakeup(priv, 0); |
| mutex_lock(&priv->lock); |
| spin_lock_irqsave(&priv->driver_lock, flags); |
| } |
| } else if (action == CMD_SUBCMD_EXIT_PS) { |
| priv->needtowakeup = 0; |
| priv->psstate = PS_STATE_FULL_POWER; |
| lbs_deb_host("CMD_RESP: EXIT_PS command response\n"); |
| } else { |
| lbs_deb_host("CMD_RESP: PS action 0x%X\n", action); |
| } |
| |
| lbs_complete_command(priv, priv->cur_cmd, result); |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| |
| ret = 0; |
| goto done; |
| } |
| |
| /* If the command is not successful, cleanup and return failure */ |
| if ((result != 0 || !(respcmd & 0x8000))) { |
| lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n", |
| result, respcmd); |
| /* |
| * Handling errors here |
| */ |
| switch (respcmd) { |
| case CMD_RET(CMD_GET_HW_SPEC): |
| case CMD_RET(CMD_802_11_RESET): |
| lbs_deb_host("CMD_RESP: reset failed\n"); |
| break; |
| |
| } |
| lbs_complete_command(priv, priv->cur_cmd, result); |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| |
| ret = -1; |
| goto done; |
| } |
| |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| |
| if (priv->cur_cmd && priv->cur_cmd->callback) { |
| ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg, |
| resp); |
| } else |
| ret = handle_cmd_response(priv, resp); |
| |
| spin_lock_irqsave(&priv->driver_lock, flags); |
| |
| if (priv->cur_cmd) { |
| /* Clean up and Put current command back to cmdfreeq */ |
| lbs_complete_command(priv, priv->cur_cmd, result); |
| } |
| spin_unlock_irqrestore(&priv->driver_lock, flags); |
| |
| done: |
| mutex_unlock(&priv->lock); |
| lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret); |
| return ret; |
| } |
| |
| int lbs_process_event(struct lbs_private *priv, u32 event) |
| { |
| int ret = 0; |
| struct cmd_header cmd; |
| |
| lbs_deb_enter(LBS_DEB_CMD); |
| |
| switch (event) { |
| case MACREG_INT_CODE_LINK_SENSED: |
| lbs_deb_cmd("EVENT: link sensed\n"); |
| break; |
| |
| case MACREG_INT_CODE_DEAUTHENTICATED: |
| lbs_deb_cmd("EVENT: deauthenticated\n"); |
| lbs_mac_event_disconnected(priv); |
| break; |
| |
| case MACREG_INT_CODE_DISASSOCIATED: |
| lbs_deb_cmd("EVENT: disassociated\n"); |
| lbs_mac_event_disconnected(priv); |
| break; |
| |
| case MACREG_INT_CODE_LINK_LOST_NO_SCAN: |
| lbs_deb_cmd("EVENT: link lost\n"); |
| lbs_mac_event_disconnected(priv); |
| break; |
| |
| case MACREG_INT_CODE_PS_SLEEP: |
| lbs_deb_cmd("EVENT: ps sleep\n"); |
| |
| /* handle unexpected PS SLEEP event */ |
| if (priv->psstate == PS_STATE_FULL_POWER) { |
| lbs_deb_cmd( |
| "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n"); |
| break; |
| } |
| priv->psstate = PS_STATE_PRE_SLEEP; |
| |
| lbs_ps_confirm_sleep(priv); |
| |
| break; |
| |
| case MACREG_INT_CODE_HOST_AWAKE: |
| lbs_deb_cmd("EVENT: host awake\n"); |
| if (priv->reset_deep_sleep_wakeup) |
| priv->reset_deep_sleep_wakeup(priv); |
| priv->is_deep_sleep = 0; |
| lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd, |
| sizeof(cmd)); |
| priv->is_host_sleep_activated = 0; |
| wake_up_interruptible(&priv->host_sleep_q); |
| break; |
| |
| case MACREG_INT_CODE_DEEP_SLEEP_AWAKE: |
| if (priv->reset_deep_sleep_wakeup) |
| priv->reset_deep_sleep_wakeup(priv); |
| lbs_deb_cmd("EVENT: ds awake\n"); |
| priv->is_deep_sleep = 0; |
| priv->wakeup_dev_required = 0; |
| wake_up_interruptible(&priv->ds_awake_q); |
| break; |
| |
| case MACREG_INT_CODE_PS_AWAKE: |
| lbs_deb_cmd("EVENT: ps awake\n"); |
| /* handle unexpected PS AWAKE event */ |
| if (priv->psstate == PS_STATE_FULL_POWER) { |
| lbs_deb_cmd( |
| "EVENT: In FULL POWER mode - ignore PS AWAKE\n"); |
| break; |
| } |
| |
| priv->psstate = PS_STATE_AWAKE; |
| |
| if (priv->needtowakeup) { |
| /* |
| * wait for the command processing to finish |
| * before resuming sending |
| * priv->needtowakeup will be set to FALSE |
| * in lbs_ps_wakeup() |
| */ |
| lbs_deb_cmd("waking up ...\n"); |
| lbs_ps_wakeup(priv, 0); |
| } |
| break; |
| |
| case MACREG_INT_CODE_MIC_ERR_UNICAST: |
| lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n"); |
| lbs_send_mic_failureevent(priv, event); |
| break; |
| |
| case MACREG_INT_CODE_MIC_ERR_MULTICAST: |
| lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n"); |
| lbs_send_mic_failureevent(priv, event); |
| break; |
| |
| case MACREG_INT_CODE_MIB_CHANGED: |
| lbs_deb_cmd("EVENT: MIB CHANGED\n"); |
| break; |
| case MACREG_INT_CODE_INIT_DONE: |
| lbs_deb_cmd("EVENT: INIT DONE\n"); |
| break; |
| case MACREG_INT_CODE_ADHOC_BCN_LOST: |
| lbs_deb_cmd("EVENT: ADHOC beacon lost\n"); |
| break; |
| case MACREG_INT_CODE_RSSI_LOW: |
| lbs_pr_alert("EVENT: rssi low\n"); |
| break; |
| case MACREG_INT_CODE_SNR_LOW: |
| lbs_pr_alert("EVENT: snr low\n"); |
| break; |
| case MACREG_INT_CODE_MAX_FAIL: |
| lbs_pr_alert("EVENT: max fail\n"); |
| break; |
| case MACREG_INT_CODE_RSSI_HIGH: |
| lbs_pr_alert("EVENT: rssi high\n"); |
| break; |
| case MACREG_INT_CODE_SNR_HIGH: |
| lbs_pr_alert("EVENT: snr high\n"); |
| break; |
| |
| case MACREG_INT_CODE_MESH_AUTO_STARTED: |
| /* Ignore spurious autostart events */ |
| lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n"); |
| break; |
| |
| default: |
| lbs_pr_alert("EVENT: unknown event id %d\n", event); |
| break; |
| } |
| |
| lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret); |
| return ret; |
| } |