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)
32 if (priv->connect_status != LBS_CONNECTED)
35 lbs_deb_enter(LBS_DEB_ASSOC);
38 * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
39 * It causes problem in the Supplicant
41 msleep_interruptible(1000);
43 if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
44 lbs_send_disconnect_notification(priv, locally_generated);
46 /* report disconnect to upper layer */
47 netif_stop_queue(priv->dev);
48 netif_carrier_off(priv->dev);
50 /* Free Tx and Rx packets */
51 spin_lock_irqsave(&priv->driver_lock, flags);
52 kfree_skb(priv->currenttxskb);
53 priv->currenttxskb = NULL;
54 priv->tx_pending_len = 0;
55 spin_unlock_irqrestore(&priv->driver_lock, flags);
57 priv->connect_status = LBS_DISCONNECTED;
59 if (priv->psstate != PS_STATE_FULL_POWER) {
60 /* make firmware to exit PS mode */
61 lbs_deb_cmd("disconnected, so exit PS mode\n");
62 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
64 lbs_deb_leave(LBS_DEB_ASSOC);
67 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
69 uint16_t respcmd, curcmd;
70 struct cmd_header *resp;
75 lbs_deb_enter(LBS_DEB_HOST);
77 mutex_lock(&priv->lock);
78 spin_lock_irqsave(&priv->driver_lock, flags);
81 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
83 spin_unlock_irqrestore(&priv->driver_lock, flags);
88 curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
89 respcmd = le16_to_cpu(resp->command);
90 result = le16_to_cpu(resp->result);
92 lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
93 respcmd, le16_to_cpu(resp->seqnum), len);
94 lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
96 if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
97 netdev_info(priv->dev,
98 "Received CMD_RESP with invalid sequence %d (expected %d)\n",
99 le16_to_cpu(resp->seqnum),
100 le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
101 spin_unlock_irqrestore(&priv->driver_lock, flags);
105 if (respcmd != CMD_RET(curcmd) &&
106 respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
107 netdev_info(priv->dev, "Invalid CMD_RESP %x to command %x!\n",
109 spin_unlock_irqrestore(&priv->driver_lock, flags);
114 if (resp->result == cpu_to_le16(0x0004)) {
115 /* 0x0004 means -EAGAIN. Drop the response, let it time out
116 and be resubmitted */
117 netdev_info(priv->dev,
118 "Firmware returns DEFER to command %x. Will let it time out...\n",
119 le16_to_cpu(resp->command));
120 spin_unlock_irqrestore(&priv->driver_lock, flags);
125 /* Now we got response from FW, cancel the command timer */
126 del_timer(&priv->command_timer);
127 priv->cmd_timed_out = 0;
129 if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
130 /* struct cmd_ds_802_11_ps_mode also contains
133 struct cmd_ds_802_11_ps_mode *psmode = (void *)resp;
134 u16 action = le16_to_cpu(psmode->action);
137 "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
141 lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
144 * We should not re-try enter-ps command in
145 * ad-hoc mode. It takes place in
146 * lbs_execute_next_command().
148 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
149 action == PS_MODE_ACTION_ENTER_PS)
150 priv->psmode = LBS802_11POWERMODECAM;
151 } else if (action == PS_MODE_ACTION_ENTER_PS) {
152 priv->needtowakeup = 0;
153 priv->psstate = PS_STATE_AWAKE;
155 lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
156 if (priv->connect_status != LBS_CONNECTED) {
158 * When Deauth Event received before Enter_PS command
159 * response, We need to wake up the firmware.
162 "disconnected, invoking lbs_ps_wakeup\n");
164 spin_unlock_irqrestore(&priv->driver_lock, flags);
165 mutex_unlock(&priv->lock);
166 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
168 mutex_lock(&priv->lock);
169 spin_lock_irqsave(&priv->driver_lock, flags);
171 } else if (action == PS_MODE_ACTION_EXIT_PS) {
172 priv->needtowakeup = 0;
173 priv->psstate = PS_STATE_FULL_POWER;
174 lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
176 lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
179 __lbs_complete_command(priv, priv->cur_cmd, result);
180 spin_unlock_irqrestore(&priv->driver_lock, flags);
186 /* If the command is not successful, cleanup and return failure */
187 if ((result != 0 || !(respcmd & 0x8000))) {
188 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
191 * Handling errors here
194 case CMD_RET(CMD_GET_HW_SPEC):
195 case CMD_RET(CMD_802_11_RESET):
196 lbs_deb_host("CMD_RESP: reset failed\n");
200 __lbs_complete_command(priv, priv->cur_cmd, result);
201 spin_unlock_irqrestore(&priv->driver_lock, flags);
207 spin_unlock_irqrestore(&priv->driver_lock, flags);
209 if (priv->cur_cmd && priv->cur_cmd->callback) {
210 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
214 spin_lock_irqsave(&priv->driver_lock, flags);
217 /* Clean up and Put current command back to cmdfreeq */
218 __lbs_complete_command(priv, priv->cur_cmd, result);
220 spin_unlock_irqrestore(&priv->driver_lock, flags);
223 mutex_unlock(&priv->lock);
224 lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
228 int lbs_process_event(struct lbs_private *priv, u32 event)
231 struct cmd_header cmd;
233 lbs_deb_enter(LBS_DEB_CMD);
236 case MACREG_INT_CODE_LINK_SENSED:
237 lbs_deb_cmd("EVENT: link sensed\n");
240 case MACREG_INT_CODE_DEAUTHENTICATED:
241 lbs_deb_cmd("EVENT: deauthenticated\n");
242 lbs_mac_event_disconnected(priv, false);
245 case MACREG_INT_CODE_DISASSOCIATED:
246 lbs_deb_cmd("EVENT: disassociated\n");
247 lbs_mac_event_disconnected(priv, false);
250 case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
251 lbs_deb_cmd("EVENT: link lost\n");
252 lbs_mac_event_disconnected(priv, true);
255 case MACREG_INT_CODE_PS_SLEEP:
256 lbs_deb_cmd("EVENT: ps sleep\n");
258 /* handle unexpected PS SLEEP event */
259 if (priv->psstate == PS_STATE_FULL_POWER) {
261 "EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");
264 if (!list_empty(&priv->cmdpendingq)) {
265 lbs_deb_cmd("EVENT: commands in queue, do not sleep\n");
268 priv->psstate = PS_STATE_PRE_SLEEP;
270 lbs_ps_confirm_sleep(priv);
274 case MACREG_INT_CODE_HOST_AWAKE:
275 lbs_deb_cmd("EVENT: host awake\n");
276 if (priv->reset_deep_sleep_wakeup)
277 priv->reset_deep_sleep_wakeup(priv);
278 priv->is_deep_sleep = 0;
279 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
281 priv->is_host_sleep_activated = 0;
282 wake_up_interruptible(&priv->host_sleep_q);
285 case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
286 if (priv->reset_deep_sleep_wakeup)
287 priv->reset_deep_sleep_wakeup(priv);
288 lbs_deb_cmd("EVENT: ds awake\n");
289 priv->is_deep_sleep = 0;
290 priv->wakeup_dev_required = 0;
291 wake_up_interruptible(&priv->ds_awake_q);
294 case MACREG_INT_CODE_PS_AWAKE:
295 lbs_deb_cmd("EVENT: ps awake\n");
296 /* handle unexpected PS AWAKE event */
297 if (priv->psstate == PS_STATE_FULL_POWER) {
299 "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
303 priv->psstate = PS_STATE_AWAKE;
305 if (priv->needtowakeup) {
307 * wait for the command processing to finish
308 * before resuming sending
309 * priv->needtowakeup will be set to FALSE
312 lbs_deb_cmd("waking up ...\n");
313 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
317 case MACREG_INT_CODE_MIC_ERR_UNICAST:
318 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
319 lbs_send_mic_failureevent(priv, event);
322 case MACREG_INT_CODE_MIC_ERR_MULTICAST:
323 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
324 lbs_send_mic_failureevent(priv, event);
327 case MACREG_INT_CODE_MIB_CHANGED:
328 lbs_deb_cmd("EVENT: MIB CHANGED\n");
330 case MACREG_INT_CODE_INIT_DONE:
331 lbs_deb_cmd("EVENT: INIT DONE\n");
333 case MACREG_INT_CODE_ADHOC_BCN_LOST:
334 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
336 case MACREG_INT_CODE_RSSI_LOW:
337 netdev_alert(priv->dev, "EVENT: rssi low\n");
339 case MACREG_INT_CODE_SNR_LOW:
340 netdev_alert(priv->dev, "EVENT: snr low\n");
342 case MACREG_INT_CODE_MAX_FAIL:
343 netdev_alert(priv->dev, "EVENT: max fail\n");
345 case MACREG_INT_CODE_RSSI_HIGH:
346 netdev_alert(priv->dev, "EVENT: rssi high\n");
348 case MACREG_INT_CODE_SNR_HIGH:
349 netdev_alert(priv->dev, "EVENT: snr high\n");
352 case MACREG_INT_CODE_MESH_AUTO_STARTED:
353 /* Ignore spurious autostart events */
354 netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");
358 netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);
362 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);