/** * This file contains the handling of command * responses as well as events generated by firmware. */ #include #include #include #include #include #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; unsigned long flags; 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; case CMD_RET(CMD_BT_ACCESS): spin_lock_irqsave(&priv->driver_lock, flags); if (priv->cur_cmd->callback_arg) memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.bt.addr1, 2 * ETH_ALEN); spin_unlock_irqrestore(&priv->driver_lock, flags); break; case CMD_RET(CMD_FWT_ACCESS): spin_lock_irqsave(&priv->driver_lock, flags); if (priv->cur_cmd->callback_arg) memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt, sizeof(resp->params.fwt)); spin_unlock_irqrestore(&priv->driver_lock, flags); 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; }