net: remove interrupt.h inclusion from netdevice.h
[linux-3.10.git] / drivers / net / wireless / libertas / cmdresp.c
1 /*
2  * This file contains the handling of command
3  * responses as well as events generated by firmware.
4  */
5
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>
12
13 #include "cfg.h"
14 #include "cmd.h"
15
16 /**
17  * lbs_mac_event_disconnected - handles disconnect event. It
18  * reports disconnect to upper layer, clean tx/rx packets,
19  * reset link state etc.
20  *
21  * @priv:       A pointer to struct lbs_private structure
22  *
23  * returns:     n/a
24  */
25 void lbs_mac_event_disconnected(struct lbs_private *priv)
26 {
27         if (priv->connect_status != LBS_CONNECTED)
28                 return;
29
30         lbs_deb_enter(LBS_DEB_ASSOC);
31
32         /*
33          * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
34          * It causes problem in the Supplicant
35          */
36         msleep_interruptible(1000);
37
38         if (priv->wdev->iftype == NL80211_IFTYPE_STATION)
39                 lbs_send_disconnect_notification(priv);
40
41         /* report disconnect to upper layer */
42         netif_stop_queue(priv->dev);
43         netif_carrier_off(priv->dev);
44
45         /* Free Tx and Rx packets */
46         kfree_skb(priv->currenttxskb);
47         priv->currenttxskb = NULL;
48         priv->tx_pending_len = 0;
49
50         priv->connect_status = LBS_DISCONNECTED;
51
52         if (priv->psstate != PS_STATE_FULL_POWER) {
53                 /* make firmware to exit PS mode */
54                 lbs_deb_cmd("disconnected, so exit PS mode\n");
55                 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
56         }
57         lbs_deb_leave(LBS_DEB_ASSOC);
58 }
59
60 int lbs_process_command_response(struct lbs_private *priv, u8 *data, u32 len)
61 {
62         uint16_t respcmd, curcmd;
63         struct cmd_header *resp;
64         int ret = 0;
65         unsigned long flags;
66         uint16_t result;
67
68         lbs_deb_enter(LBS_DEB_HOST);
69
70         mutex_lock(&priv->lock);
71         spin_lock_irqsave(&priv->driver_lock, flags);
72
73         if (!priv->cur_cmd) {
74                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
75                 ret = -1;
76                 spin_unlock_irqrestore(&priv->driver_lock, flags);
77                 goto done;
78         }
79
80         resp = (void *)data;
81         curcmd = le16_to_cpu(priv->cur_cmd->cmdbuf->command);
82         respcmd = le16_to_cpu(resp->command);
83         result = le16_to_cpu(resp->result);
84
85         lbs_deb_cmd("CMD_RESP: response 0x%04x, seq %d, size %d\n",
86                      respcmd, le16_to_cpu(resp->seqnum), len);
87         lbs_deb_hex(LBS_DEB_CMD, "CMD_RESP", (void *) resp, len);
88
89         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
90                 netdev_info(priv->dev,
91                             "Received CMD_RESP with invalid sequence %d (expected %d)\n",
92                             le16_to_cpu(resp->seqnum),
93                             le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
94                 spin_unlock_irqrestore(&priv->driver_lock, flags);
95                 ret = -1;
96                 goto done;
97         }
98         if (respcmd != CMD_RET(curcmd) &&
99             respcmd != CMD_RET_802_11_ASSOCIATE && curcmd != CMD_802_11_ASSOCIATE) {
100                 netdev_info(priv->dev, "Invalid CMD_RESP %x to command %x!\n",
101                             respcmd, curcmd);
102                 spin_unlock_irqrestore(&priv->driver_lock, flags);
103                 ret = -1;
104                 goto done;
105         }
106
107         if (resp->result == cpu_to_le16(0x0004)) {
108                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
109                    and be resubmitted */
110                 netdev_info(priv->dev,
111                             "Firmware returns DEFER to command %x. Will let it time out...\n",
112                             le16_to_cpu(resp->command));
113                 spin_unlock_irqrestore(&priv->driver_lock, flags);
114                 ret = -1;
115                 goto done;
116         }
117
118         /* Now we got response from FW, cancel the command timer */
119         del_timer(&priv->command_timer);
120         priv->cmd_timed_out = 0;
121
122         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
123                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
124                 u16 action = le16_to_cpu(psmode->action);
125
126                 lbs_deb_host(
127                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
128                        result, action);
129
130                 if (result) {
131                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
132                                     result);
133                         /*
134                          * We should not re-try enter-ps command in
135                          * ad-hoc mode. It takes place in
136                          * lbs_execute_next_command().
137                          */
138                         if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR &&
139                             action == PS_MODE_ACTION_ENTER_PS)
140                                 priv->psmode = LBS802_11POWERMODECAM;
141                 } else if (action == PS_MODE_ACTION_ENTER_PS) {
142                         priv->needtowakeup = 0;
143                         priv->psstate = PS_STATE_AWAKE;
144
145                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
146                         if (priv->connect_status != LBS_CONNECTED) {
147                                 /*
148                                  * When Deauth Event received before Enter_PS command
149                                  * response, We need to wake up the firmware.
150                                  */
151                                 lbs_deb_host(
152                                        "disconnected, invoking lbs_ps_wakeup\n");
153
154                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
155                                 mutex_unlock(&priv->lock);
156                                 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS,
157                                                 false);
158                                 mutex_lock(&priv->lock);
159                                 spin_lock_irqsave(&priv->driver_lock, flags);
160                         }
161                 } else if (action == PS_MODE_ACTION_EXIT_PS) {
162                         priv->needtowakeup = 0;
163                         priv->psstate = PS_STATE_FULL_POWER;
164                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
165                 } else {
166                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
167                 }
168
169                 lbs_complete_command(priv, priv->cur_cmd, result);
170                 spin_unlock_irqrestore(&priv->driver_lock, flags);
171
172                 ret = 0;
173                 goto done;
174         }
175
176         /* If the command is not successful, cleanup and return failure */
177         if ((result != 0 || !(respcmd & 0x8000))) {
178                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
179                        result, respcmd);
180                 /*
181                  * Handling errors here
182                  */
183                 switch (respcmd) {
184                 case CMD_RET(CMD_GET_HW_SPEC):
185                 case CMD_RET(CMD_802_11_RESET):
186                         lbs_deb_host("CMD_RESP: reset failed\n");
187                         break;
188
189                 }
190                 lbs_complete_command(priv, priv->cur_cmd, result);
191                 spin_unlock_irqrestore(&priv->driver_lock, flags);
192
193                 ret = -1;
194                 goto done;
195         }
196
197         spin_unlock_irqrestore(&priv->driver_lock, flags);
198
199         if (priv->cur_cmd && priv->cur_cmd->callback) {
200                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
201                                 resp);
202         }
203
204         spin_lock_irqsave(&priv->driver_lock, flags);
205
206         if (priv->cur_cmd) {
207                 /* Clean up and Put current command back to cmdfreeq */
208                 lbs_complete_command(priv, priv->cur_cmd, result);
209         }
210         spin_unlock_irqrestore(&priv->driver_lock, flags);
211
212 done:
213         mutex_unlock(&priv->lock);
214         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
215         return ret;
216 }
217
218 int lbs_process_event(struct lbs_private *priv, u32 event)
219 {
220         int ret = 0;
221         struct cmd_header cmd;
222
223         lbs_deb_enter(LBS_DEB_CMD);
224
225         switch (event) {
226         case MACREG_INT_CODE_LINK_SENSED:
227                 lbs_deb_cmd("EVENT: link sensed\n");
228                 break;
229
230         case MACREG_INT_CODE_DEAUTHENTICATED:
231                 lbs_deb_cmd("EVENT: deauthenticated\n");
232                 lbs_mac_event_disconnected(priv);
233                 break;
234
235         case MACREG_INT_CODE_DISASSOCIATED:
236                 lbs_deb_cmd("EVENT: disassociated\n");
237                 lbs_mac_event_disconnected(priv);
238                 break;
239
240         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
241                 lbs_deb_cmd("EVENT: link lost\n");
242                 lbs_mac_event_disconnected(priv);
243                 break;
244
245         case MACREG_INT_CODE_PS_SLEEP:
246                 lbs_deb_cmd("EVENT: ps sleep\n");
247
248                 /* handle unexpected PS SLEEP event */
249                 if (priv->psstate == PS_STATE_FULL_POWER) {
250                         lbs_deb_cmd(
251                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
252                         break;
253                 }
254                 priv->psstate = PS_STATE_PRE_SLEEP;
255
256                 lbs_ps_confirm_sleep(priv);
257
258                 break;
259
260         case MACREG_INT_CODE_HOST_AWAKE:
261                 lbs_deb_cmd("EVENT: host awake\n");
262                 if (priv->reset_deep_sleep_wakeup)
263                         priv->reset_deep_sleep_wakeup(priv);
264                 priv->is_deep_sleep = 0;
265                 lbs_cmd_async(priv, CMD_802_11_WAKEUP_CONFIRM, &cmd,
266                                 sizeof(cmd));
267                 priv->is_host_sleep_activated = 0;
268                 wake_up_interruptible(&priv->host_sleep_q);
269                 break;
270
271         case MACREG_INT_CODE_DEEP_SLEEP_AWAKE:
272                 if (priv->reset_deep_sleep_wakeup)
273                         priv->reset_deep_sleep_wakeup(priv);
274                 lbs_deb_cmd("EVENT: ds awake\n");
275                 priv->is_deep_sleep = 0;
276                 priv->wakeup_dev_required = 0;
277                 wake_up_interruptible(&priv->ds_awake_q);
278                 break;
279
280         case MACREG_INT_CODE_PS_AWAKE:
281                 lbs_deb_cmd("EVENT: ps awake\n");
282                 /* handle unexpected PS AWAKE event */
283                 if (priv->psstate == PS_STATE_FULL_POWER) {
284                         lbs_deb_cmd(
285                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
286                         break;
287                 }
288
289                 priv->psstate = PS_STATE_AWAKE;
290
291                 if (priv->needtowakeup) {
292                         /*
293                          * wait for the command processing to finish
294                          * before resuming sending
295                          * priv->needtowakeup will be set to FALSE
296                          * in lbs_ps_wakeup()
297                          */
298                         lbs_deb_cmd("waking up ...\n");
299                         lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, false);
300                 }
301                 break;
302
303         case MACREG_INT_CODE_MIC_ERR_UNICAST:
304                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
305                 lbs_send_mic_failureevent(priv, event);
306                 break;
307
308         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
309                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
310                 lbs_send_mic_failureevent(priv, event);
311                 break;
312
313         case MACREG_INT_CODE_MIB_CHANGED:
314                 lbs_deb_cmd("EVENT: MIB CHANGED\n");
315                 break;
316         case MACREG_INT_CODE_INIT_DONE:
317                 lbs_deb_cmd("EVENT: INIT DONE\n");
318                 break;
319         case MACREG_INT_CODE_ADHOC_BCN_LOST:
320                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
321                 break;
322         case MACREG_INT_CODE_RSSI_LOW:
323                 netdev_alert(priv->dev, "EVENT: rssi low\n");
324                 break;
325         case MACREG_INT_CODE_SNR_LOW:
326                 netdev_alert(priv->dev, "EVENT: snr low\n");
327                 break;
328         case MACREG_INT_CODE_MAX_FAIL:
329                 netdev_alert(priv->dev, "EVENT: max fail\n");
330                 break;
331         case MACREG_INT_CODE_RSSI_HIGH:
332                 netdev_alert(priv->dev, "EVENT: rssi high\n");
333                 break;
334         case MACREG_INT_CODE_SNR_HIGH:
335                 netdev_alert(priv->dev, "EVENT: snr high\n");
336                 break;
337
338         case MACREG_INT_CODE_MESH_AUTO_STARTED:
339                 /* Ignore spurious autostart events */
340                 netdev_info(priv->dev, "EVENT: MESH_AUTO_STARTED (ignoring)\n");
341                 break;
342
343         default:
344                 netdev_alert(priv->dev, "EVENT: unknown event id %d\n", event);
345                 break;
346         }
347
348         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
349         return ret;
350 }