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1// SPDX-License-Identifier: GPL-2.02/*3 * This file contains the handling of command4 * responses as well as events generated by firmware.5 */6 7#include <linux/hardirq.h>8#include <linux/slab.h>9#include <linux/delay.h>10#include <linux/sched.h>11#include <linux/unaligned.h>12#include <net/cfg80211.h>13 14#include "cfg.h"15#include "cmd.h"16 17/**18 * lbs_mac_event_disconnected - handles disconnect event. It19 * reports disconnect to upper layer, clean tx/rx packets,20 * reset link state etc.21 *22 * @priv: A pointer to struct lbs_private structure23 * @locally_generated: indicates disconnect was requested locally24 * (usually by userspace)25 *26 * returns: n/a27 */28void lbs_mac_event_disconnected(struct lbs_private *priv,29 bool locally_generated)30{31 unsigned long flags;32 33 if (priv->connect_status != LBS_CONNECTED)34 return;35 36 /*37 * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.38 * It causes problem in the Supplicant39 */40 msleep_interruptible(1000);41 42 if (priv->wdev->iftype == NL80211_IFTYPE_STATION)43 lbs_send_disconnect_notification(priv, locally_generated);44 45 /* report disconnect to upper layer */46 netif_stop_queue(priv->dev);47 netif_carrier_off(priv->dev);48 49 /* Free Tx and Rx packets */50 spin_lock_irqsave(&priv->driver_lock, flags);51 dev_kfree_skb_irq(priv->currenttxskb);52 priv->currenttxskb = NULL;53 priv->tx_pending_len = 0;54 spin_unlock_irqrestore(&priv->driver_lock, flags);55 56 priv->connect_status = LBS_DISCONNECTED;57 58 if (priv->psstate != PS_STATE_FULL_POWER) {59 /* make firmware to exit PS mode */60 lbs_deb_cmd("disconnected, so exit PS mode\n");61 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);62 }63}64 65int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)66{67 uint16_t respcmd, curcmd;68 struct cmd_header *resp;69 int ret = 0;70 unsigned long flags;71 uint16_t result;72 73 mutex_lock(&priv->lock);74 spin_lock_irqsave(&priv->driver_lock, flags);75 76 if (!priv->cur_cmd) {77 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");78 ret = -1;79 spin_unlock_irqrestore(&priv->driver_lock, flags);80 goto done;81 }82 83 resp = (void *)data;84 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);85 respcmd = le16_to_cpu(resp->command);86 result = le16_to_cpu(resp->result);87 88 lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",89 respcmd, le16_to_cpu(resp->seqnum), len);90 lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);91 92 if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {93 netdev_info(priv->dev,94 "Received CMD_RESP with invalid sequence %d (expected %d)\n",95 le16_to_cpu(resp->seqnum),96 le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));97 spin_unlock_irqrestore(&priv->driver_lock, flags);98 ret = -1;99 goto done;100 }101 if (respcmd != CMD_RET(curcmd) &&102 respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {103 netdev_info(priv->dev, "Invalid CMD_RESP %x to command %x!\n",104 respcmd, curcmd);105 spin_unlock_irqrestore(&priv->driver_lock, flags);106 ret = -1;107 goto done;108 }109 110 if (resp->result == cpu_to_le16(0x0004)) {111 /* 0x0004 means -EAGAIN. Drop the response, let it time out112 and be resubmitted */113 netdev_info(priv->dev,114 "Firmware returns DEFER to command %x. Will let it time out...\n",115 le16_to_cpu(resp->command));116 spin_unlock_irqrestore(&priv->driver_lock, flags);117 ret = -1;118 goto done;119 }120 121 /* Now we got response from FW, cancel the command timer */122 del_timer(&priv->command_timer);123 priv->cmd_timed_out = 0;124 125 if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {126 /* struct cmd_ds_802_11_ps_mode also contains127 * the header128 */129 struct cmd_ds_802_11_ps_mode *psmode = (void *)resp;130 u16 action = le16_to_cpu(psmode->action);131 132 lbs_deb_host(133 "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",134 result, action);135 136 if (result) {137 lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",138 result);139 /*140 * We should not re-try enter-ps command in141 * ad-hoc mode. It takes place in142 * lbs_execute_next_command().143 */144 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&145 action == PS_MODE_ACTION_ENTER_PS)146 priv->psmode = LBS802_11POWERMODECAM;147 } else if (action == PS_MODE_ACTION_ENTER_PS) {148 priv->needtowakeup = 0;149 priv->psstate = PS_STATE_AWAKE;150 151 lbs_deb_host("CMD_RESP: ENTER_PS command response\n");152 if (priv->connect_status != LBS_CONNECTED) {153 /*154 * When Deauth Event received before Enter_PS command155 * response, We need to wake up the firmware.156 */157 lbs_deb_host(158 "disconnected, invoking lbs_ps_wakeup\n");159 160 spin_unlock_irqrestore(&priv->driver_lock, flags);161 mutex_unlock(&priv->lock);162 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,163 false);164 mutex_lock(&priv->lock);165 spin_lock_irqsave(&priv->driver_lock, flags);166 }167 } else if (action == PS_MODE_ACTION_EXIT_PS) {168 priv->needtowakeup = 0;169 priv->psstate = PS_STATE_FULL_POWER;170 lbs_deb_host("CMD_RESP: EXIT_PS command response\n");171 } else {172 lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);173 }174 175 __lbs_complete_command(priv, priv->cur_cmd, result);176 spin_unlock_irqrestore(&priv->driver_lock, flags);177 178 ret = 0;179 goto done;180 }181 182 /* If the command is not successful, cleanup and return failure */183 if ((result != 0 || !(respcmd & 0x8000))) {184 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",185 result, respcmd);186 /*187 * Handling errors here188 */189 switch (respcmd) {190 case CMD_RET(CMD_GET_HW_SPEC):191 case CMD_RET(CMD_802_11_RESET):192 lbs_deb_host("CMD_RESP: reset failed\n");193 break;194 195 }196 __lbs_complete_command(priv, priv->cur_cmd, result);197 spin_unlock_irqrestore(&priv->driver_lock, flags);198 199 ret = -1;200 goto done;201 }202 203 spin_unlock_irqrestore(&priv->driver_lock, flags);204 205 if (priv->cur_cmd && priv->cur_cmd->callback) {206 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,207 resp);208 }209 210 spin_lock_irqsave(&priv->driver_lock, flags);211 212 if (priv->cur_cmd) {213 /* Clean up and Put current command back to cmdfreeq */214 __lbs_complete_command(priv, priv->cur_cmd, result);215 }216 spin_unlock_irqrestore(&priv->driver_lock, flags);217 218done:219 mutex_unlock(&priv->lock);220 return ret;221}222 223void lbs_process_event(struct lbs_private *priv, u32 event)224{225 struct cmd_header cmd;226 227 switch (event) {228 case MACREG_INT_CODE_LINK_SENSED:229 lbs_deb_cmd("EVENT: link sensed\n");230 break;231 232 case MACREG_INT_CODE_DEAUTHENTICATED:233 lbs_deb_cmd("EVENT: deauthenticated\n");234 lbs_mac_event_disconnected(priv, false);235 break;236 237 case MACREG_INT_CODE_DISASSOCIATED:238 lbs_deb_cmd("EVENT: disassociated\n");239 lbs_mac_event_disconnected(priv, false);240 break;241 242 case MACREG_INT_CODE_LINK_LOST_NO_SCAN:243 lbs_deb_cmd("EVENT: link lost\n");244 lbs_mac_event_disconnected(priv, true);245 break;246 247 case MACREG_INT_CODE_PS_SLEEP:248 lbs_deb_cmd("EVENT: ps sleep\n");249 250 /* handle unexpected PS SLEEP event */251 if (priv->psstate == PS_STATE_FULL_POWER) {252 lbs_deb_cmd(253 "EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");254 break;255 }256 if (!list_empty(&priv->cmdpendingq)) {257 lbs_deb_cmd("EVENT: commands in queue, do not sleep\n");258 break;259 }260 priv->psstate = PS_STATE_PRE_SLEEP;261 262 lbs_ps_confirm_sleep(priv);263 264 break;265 266 case MACREG_INT_CODE_HOST_AWAKE:267 lbs_deb_cmd("EVENT: host awake\n");268 if (priv->reset_deep_sleep_wakeup)269 priv->reset_deep_sleep_wakeup(priv);270 priv->is_deep_sleep = 0;271 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,272 sizeof(cmd));273 priv->is_host_sleep_activated = 0;274 wake_up_interruptible(&priv->host_sleep_q);275 break;276 277 case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:278 if (priv->reset_deep_sleep_wakeup)279 priv->reset_deep_sleep_wakeup(priv);280 lbs_deb_cmd("EVENT: ds awake\n");281 priv->is_deep_sleep = 0;282 priv->wakeup_dev_required = 0;283 wake_up_interruptible(&priv->ds_awake_q);284 break;285 286 case MACREG_INT_CODE_PS_AWAKE:287 lbs_deb_cmd("EVENT: ps awake\n");288 /* handle unexpected PS AWAKE event */289 if (priv->psstate == PS_STATE_FULL_POWER) {290 lbs_deb_cmd(291 "EVENT: In FULL POWER mode - ignore PS AWAKE\n");292 break;293 }294 295 priv->psstate = PS_STATE_AWAKE;296 297 if (priv->needtowakeup) {298 /*299 * wait for the command processing to finish300 * before resuming sending301 * priv->needtowakeup will be set to FALSE302 * in lbs_ps_wakeup()303 */304 lbs_deb_cmd("waking up ...\n");305 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);306 }307 break;308 309 case MACREG_INT_CODE_MIC_ERR_UNICAST:310 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");311 lbs_send_mic_failureevent(priv, event);312 break;313 314 case MACREG_INT_CODE_MIC_ERR_MULTICAST:315 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");316 lbs_send_mic_failureevent(priv, event);317 break;318 319 case MACREG_INT_CODE_MIB_CHANGED:320 lbs_deb_cmd("EVENT: MIB CHANGED\n");321 break;322 case MACREG_INT_CODE_INIT_DONE:323 lbs_deb_cmd("EVENT: INIT DONE\n");324 break;325 case MACREG_INT_CODE_ADHOC_BCN_LOST:326 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");327 break;328 case MACREG_INT_CODE_RSSI_LOW:329 netdev_alert(priv->dev, "EVENT: rssi low\n");330 break;331 case MACREG_INT_CODE_SNR_LOW:332 netdev_alert(priv->dev, "EVENT: snr low\n");333 break;334 case MACREG_INT_CODE_MAX_FAIL:335 netdev_alert(priv->dev, "EVENT: max fail\n");336 break;337 case MACREG_INT_CODE_RSSI_HIGH:338 netdev_alert(priv->dev, "EVENT: rssi high\n");339 break;340 case MACREG_INT_CODE_SNR_HIGH:341 netdev_alert(priv->dev, "EVENT: snr high\n");342 break;343 344 case MACREG_INT_CODE_MESH_AUTO_STARTED:345 /* Ignore spurious autostart events */346 netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");347 break;348 349 default:350 netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);351 break;352 }353}354