2 * This file contains the handling of command
3 * responses as well as events generated by firmware.
6 #include <linux/hardirq.h>
7 #include <linux/slab.h>
8 #include <linux/delay.h>
9 #include <linux/sched.h>
10 #include <asm/unaligned.h>
11 #include <net/cfg80211.h>
17 * lbs_mac_event_disconnected - handles disconnect event. It
18 * reports disconnect to upper layer, clean tx/rx packets,
19 * reset link state etc.
21 * @priv: A pointer to struct lbs_private structure
22 * @locally_generated: indicates disconnect was requested locally
23 * (usually by userspace)
27 void lbs_mac_event_disconnected(struct lbs_private *priv,
28 bool locally_generated)
30 if (priv->connect_status != LBS_CONNECTED)
33 lbs_deb_enter(LBS_DEB_ASSOC);
36 * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
37 * It causes problem in the Supplicant
39 msleep_interruptible(1000);
41 if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
42 lbs_send_disconnect_notification(priv, locally_generated);
44 /* report disconnect to upper layer */
45 netif_stop_queue(priv->dev);
46 netif_carrier_off(priv->dev);
48 /* Free Tx and Rx packets */
49 kfree_skb(priv->currenttxskb);
50 priv->currenttxskb = NULL;
51 priv->tx_pending_len = 0;
53 priv->connect_status = LBS_DISCONNECTED;
55 if (priv->psstate != PS_STATE_FULL_POWER) {
56 /* make firmware to exit PS mode */
57 lbs_deb_cmd("disconnected, so exit PS mode\n");
58 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
60 lbs_deb_leave(LBS_DEB_ASSOC);
63 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
65 uint16_t respcmd, curcmd;
66 struct cmd_header *resp;
71 lbs_deb_enter(LBS_DEB_HOST);
73 mutex_lock(&priv->lock);
74 spin_lock_irqsave(&priv->driver_lock, flags);
77 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
79 spin_unlock_irqrestore(&priv->driver_lock, flags);
84 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
85 respcmd = le16_to_cpu(resp->command);
86 result = le16_to_cpu(resp->result);
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);
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);
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",
105 spin_unlock_irqrestore(&priv->driver_lock, flags);
110 if (resp->result == cpu_to_le16(0x0004)) {
111 /* 0x0004 means -EAGAIN. Drop the response, let it time out
112 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);
121 /* Now we got response from FW, cancel the command timer */
122 del_timer(&priv->command_timer);
123 priv->cmd_timed_out = 0;
125 if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
126 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
127 u16 action = le16_to_cpu(psmode->action);
130 "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
134 lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
137 * We should not re-try enter-ps command in
138 * ad-hoc mode. It takes place in
139 * lbs_execute_next_command().
141 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
142 action == PS_MODE_ACTION_ENTER_PS)
143 priv->psmode = LBS802_11POWERMODECAM;
144 } else if (action == PS_MODE_ACTION_ENTER_PS) {
145 priv->needtowakeup = 0;
146 priv->psstate = PS_STATE_AWAKE;
148 lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
149 if (priv->connect_status != LBS_CONNECTED) {
151 * When Deauth Event received before Enter_PS command
152 * response, We need to wake up the firmware.
155 "disconnected, invoking lbs_ps_wakeup\n");
157 spin_unlock_irqrestore(&priv->driver_lock, flags);
158 mutex_unlock(&priv->lock);
159 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
161 mutex_lock(&priv->lock);
162 spin_lock_irqsave(&priv->driver_lock, flags);
164 } else if (action == PS_MODE_ACTION_EXIT_PS) {
165 priv->needtowakeup = 0;
166 priv->psstate = PS_STATE_FULL_POWER;
167 lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
169 lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
172 __lbs_complete_command(priv, priv->cur_cmd, result);
173 spin_unlock_irqrestore(&priv->driver_lock, flags);
179 /* If the command is not successful, cleanup and return failure */
180 if ((result != 0 || !(respcmd & 0x8000))) {
181 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
184 * Handling errors here
187 case CMD_RET(CMD_GET_HW_SPEC):
188 case CMD_RET(CMD_802_11_RESET):
189 lbs_deb_host("CMD_RESP: reset failed\n");
193 __lbs_complete_command(priv, priv->cur_cmd, result);
194 spin_unlock_irqrestore(&priv->driver_lock, flags);
200 spin_unlock_irqrestore(&priv->driver_lock, flags);
202 if (priv->cur_cmd && priv->cur_cmd->callback) {
203 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
207 spin_lock_irqsave(&priv->driver_lock, flags);
210 /* Clean up and Put current command back to cmdfreeq */
211 __lbs_complete_command(priv, priv->cur_cmd, result);
213 spin_unlock_irqrestore(&priv->driver_lock, flags);
216 mutex_unlock(&priv->lock);
217 lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
221 int lbs_process_event(struct lbs_private *priv, u32 event)
224 struct cmd_header cmd;
226 lbs_deb_enter(LBS_DEB_CMD);
229 case MACREG_INT_CODE_LINK_SENSED:
230 lbs_deb_cmd("EVENT: link sensed\n");
233 case MACREG_INT_CODE_DEAUTHENTICATED:
234 lbs_deb_cmd("EVENT: deauthenticated\n");
235 lbs_mac_event_disconnected(priv, false);
238 case MACREG_INT_CODE_DISASSOCIATED:
239 lbs_deb_cmd("EVENT: disassociated\n");
240 lbs_mac_event_disconnected(priv, false);
243 case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
244 lbs_deb_cmd("EVENT: link lost\n");
245 lbs_mac_event_disconnected(priv, true);
248 case MACREG_INT_CODE_PS_SLEEP:
249 lbs_deb_cmd("EVENT: ps sleep\n");
251 /* handle unexpected PS SLEEP event */
252 if (priv->psstate == PS_STATE_FULL_POWER) {
254 "EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");
257 priv->psstate = PS_STATE_PRE_SLEEP;
259 lbs_ps_confirm_sleep(priv);
263 case MACREG_INT_CODE_HOST_AWAKE:
264 lbs_deb_cmd("EVENT: host awake\n");
265 if (priv->reset_deep_sleep_wakeup)
266 priv->reset_deep_sleep_wakeup(priv);
267 priv->is_deep_sleep = 0;
268 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
270 priv->is_host_sleep_activated = 0;
271 wake_up_interruptible(&priv->host_sleep_q);
274 case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
275 if (priv->reset_deep_sleep_wakeup)
276 priv->reset_deep_sleep_wakeup(priv);
277 lbs_deb_cmd("EVENT: ds awake\n");
278 priv->is_deep_sleep = 0;
279 priv->wakeup_dev_required = 0;
280 wake_up_interruptible(&priv->ds_awake_q);
283 case MACREG_INT_CODE_PS_AWAKE:
284 lbs_deb_cmd("EVENT: ps awake\n");
285 /* handle unexpected PS AWAKE event */
286 if (priv->psstate == PS_STATE_FULL_POWER) {
288 "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
292 priv->psstate = PS_STATE_AWAKE;
294 if (priv->needtowakeup) {
296 * wait for the command processing to finish
297 * before resuming sending
298 * priv->needtowakeup will be set to FALSE
301 lbs_deb_cmd("waking up ...\n");
302 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
306 case MACREG_INT_CODE_MIC_ERR_UNICAST:
307 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
308 lbs_send_mic_failureevent(priv, event);
311 case MACREG_INT_CODE_MIC_ERR_MULTICAST:
312 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
313 lbs_send_mic_failureevent(priv, event);
316 case MACREG_INT_CODE_MIB_CHANGED:
317 lbs_deb_cmd("EVENT: MIB CHANGED\n");
319 case MACREG_INT_CODE_INIT_DONE:
320 lbs_deb_cmd("EVENT: INIT DONE\n");
322 case MACREG_INT_CODE_ADHOC_BCN_LOST:
323 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
325 case MACREG_INT_CODE_RSSI_LOW:
326 netdev_alert(priv->dev, "EVENT: rssi low\n");
328 case MACREG_INT_CODE_SNR_LOW:
329 netdev_alert(priv->dev, "EVENT: snr low\n");
331 case MACREG_INT_CODE_MAX_FAIL:
332 netdev_alert(priv->dev, "EVENT: max fail\n");
334 case MACREG_INT_CODE_RSSI_HIGH:
335 netdev_alert(priv->dev, "EVENT: rssi high\n");
337 case MACREG_INT_CODE_SNR_HIGH:
338 netdev_alert(priv->dev, "EVENT: snr high\n");
341 case MACREG_INT_CODE_MESH_AUTO_STARTED:
342 /* Ignore spurious autostart events */
343 netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");
347 netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);
351 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);