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857485c0 TW |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
5 | * Copyright(c) 2008 Intel Corporation. All rights reserved. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
19 | * USA | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
23 | * | |
24 | * Contact Information: | |
25 | * Tomas Winkler <tomas.winkler@intel.com> | |
26 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
27 | *****************************************************************************/ | |
28 | ||
29 | #include <linux/kernel.h> | |
30 | #include <linux/module.h> | |
857485c0 TW |
31 | #include <net/mac80211.h> |
32 | ||
3e0d4cb1 | 33 | #include "iwl-dev.h" /* FIXME: remove */ |
857485c0 TW |
34 | #include "iwl-debug.h" |
35 | #include "iwl-eeprom.h" | |
36 | #include "iwl-core.h" | |
37 | ||
38 | ||
39 | #define IWL_CMD(x) case x : return #x | |
40 | ||
41 | const char *get_cmd_string(u8 cmd) | |
42 | { | |
43 | switch (cmd) { | |
44 | IWL_CMD(REPLY_ALIVE); | |
45 | IWL_CMD(REPLY_ERROR); | |
46 | IWL_CMD(REPLY_RXON); | |
47 | IWL_CMD(REPLY_RXON_ASSOC); | |
48 | IWL_CMD(REPLY_QOS_PARAM); | |
49 | IWL_CMD(REPLY_RXON_TIMING); | |
50 | IWL_CMD(REPLY_ADD_STA); | |
51 | IWL_CMD(REPLY_REMOVE_STA); | |
52 | IWL_CMD(REPLY_REMOVE_ALL_STA); | |
0a0bed1d | 53 | IWL_CMD(REPLY_WEPKEY); |
857485c0 TW |
54 | IWL_CMD(REPLY_TX); |
55 | IWL_CMD(REPLY_RATE_SCALE); | |
56 | IWL_CMD(REPLY_LEDS_CMD); | |
57 | IWL_CMD(REPLY_TX_LINK_QUALITY_CMD); | |
7c616cba | 58 | IWL_CMD(COEX_PRIORITY_TABLE_CMD); |
857485c0 TW |
59 | IWL_CMD(RADAR_NOTIFICATION); |
60 | IWL_CMD(REPLY_QUIET_CMD); | |
61 | IWL_CMD(REPLY_CHANNEL_SWITCH); | |
62 | IWL_CMD(CHANNEL_SWITCH_NOTIFICATION); | |
63 | IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD); | |
64 | IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION); | |
65 | IWL_CMD(POWER_TABLE_CMD); | |
66 | IWL_CMD(PM_SLEEP_NOTIFICATION); | |
67 | IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC); | |
68 | IWL_CMD(REPLY_SCAN_CMD); | |
69 | IWL_CMD(REPLY_SCAN_ABORT_CMD); | |
70 | IWL_CMD(SCAN_START_NOTIFICATION); | |
71 | IWL_CMD(SCAN_RESULTS_NOTIFICATION); | |
72 | IWL_CMD(SCAN_COMPLETE_NOTIFICATION); | |
73 | IWL_CMD(BEACON_NOTIFICATION); | |
74 | IWL_CMD(REPLY_TX_BEACON); | |
75 | IWL_CMD(WHO_IS_AWAKE_NOTIFICATION); | |
76 | IWL_CMD(QUIET_NOTIFICATION); | |
77 | IWL_CMD(REPLY_TX_PWR_TABLE_CMD); | |
78 | IWL_CMD(MEASURE_ABORT_NOTIFICATION); | |
79 | IWL_CMD(REPLY_BT_CONFIG); | |
80 | IWL_CMD(REPLY_STATISTICS_CMD); | |
81 | IWL_CMD(STATISTICS_NOTIFICATION); | |
82 | IWL_CMD(REPLY_CARD_STATE_CMD); | |
83 | IWL_CMD(CARD_STATE_NOTIFICATION); | |
84 | IWL_CMD(MISSED_BEACONS_NOTIFICATION); | |
85 | IWL_CMD(REPLY_CT_KILL_CONFIG_CMD); | |
86 | IWL_CMD(SENSITIVITY_CMD); | |
87 | IWL_CMD(REPLY_PHY_CALIBRATION_CMD); | |
88 | IWL_CMD(REPLY_RX_PHY_CMD); | |
89 | IWL_CMD(REPLY_RX_MPDU_CMD); | |
90 | IWL_CMD(REPLY_RX); | |
91 | IWL_CMD(REPLY_COMPRESSED_BA); | |
7c616cba TW |
92 | IWL_CMD(CALIBRATION_CFG_CMD); |
93 | IWL_CMD(CALIBRATION_RES_NOTIFICATION); | |
94 | IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION); | |
ebbbdc3f | 95 | IWL_CMD(REPLY_TX_POWER_DBM_CMD); |
857485c0 TW |
96 | default: |
97 | return "UNKNOWN"; | |
98 | ||
99 | } | |
100 | } | |
101 | EXPORT_SYMBOL(get_cmd_string); | |
102 | ||
103 | #define HOST_COMPLETE_TIMEOUT (HZ / 2) | |
104 | ||
0472f887 EG |
105 | static int iwl_generic_cmd_callback(struct iwl_priv *priv, |
106 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
107 | { | |
db11d634 | 108 | struct iwl_rx_packet *pkt = NULL; |
0472f887 EG |
109 | |
110 | if (!skb) { | |
111 | IWL_ERROR("Error: Response NULL in %s.\n", | |
112 | get_cmd_string(cmd->hdr.cmd)); | |
113 | return 1; | |
114 | } | |
115 | ||
db11d634 | 116 | pkt = (struct iwl_rx_packet *)skb->data; |
0472f887 EG |
117 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { |
118 | IWL_ERROR("Bad return from %s (0x%08X)\n", | |
119 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); | |
120 | return 1; | |
121 | } | |
122 | ||
ded2ae7c EK |
123 | #ifdef CONFIG_IWLWIFI_DEBUG |
124 | switch (cmd->hdr.cmd) { | |
125 | case REPLY_TX_LINK_QUALITY_CMD: | |
126 | case SENSITIVITY_CMD: | |
127 | IWL_DEBUG_HC_DUMP("back from %s (0x%08X)\n", | |
128 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); | |
129 | break; | |
130 | default: | |
131 | IWL_DEBUG_HC("back from %s (0x%08X)\n", | |
132 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); | |
133 | } | |
134 | #endif | |
0472f887 EG |
135 | |
136 | /* Let iwl_tx_complete free the response skb */ | |
137 | return 1; | |
138 | } | |
139 | ||
857485c0 TW |
140 | static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd) |
141 | { | |
142 | int ret; | |
143 | ||
144 | BUG_ON(!(cmd->meta.flags & CMD_ASYNC)); | |
145 | ||
146 | /* An asynchronous command can not expect an SKB to be set. */ | |
147 | BUG_ON(cmd->meta.flags & CMD_WANT_SKB); | |
148 | ||
0472f887 EG |
149 | /* Assign a generic callback if one is not provided */ |
150 | if (!cmd->meta.u.callback) | |
151 | cmd->meta.u.callback = iwl_generic_cmd_callback; | |
857485c0 TW |
152 | |
153 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
154 | return -EBUSY; | |
155 | ||
fd4abac5 | 156 | ret = iwl_enqueue_hcmd(priv, cmd); |
857485c0 TW |
157 | if (ret < 0) { |
158 | IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n", | |
159 | get_cmd_string(cmd->id), ret); | |
160 | return ret; | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
165 | int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
166 | { | |
167 | int cmd_idx; | |
168 | int ret; | |
857485c0 TW |
169 | |
170 | BUG_ON(cmd->meta.flags & CMD_ASYNC); | |
171 | ||
172 | /* A synchronous command can not have a callback set. */ | |
173 | BUG_ON(cmd->meta.u.callback != NULL); | |
174 | ||
e5472978 | 175 | if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) { |
857485c0 TW |
176 | IWL_ERROR("Error sending %s: Already sending a host command\n", |
177 | get_cmd_string(cmd->id)); | |
e5472978 TW |
178 | ret = -EBUSY; |
179 | goto out; | |
857485c0 TW |
180 | } |
181 | ||
182 | set_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
183 | ||
184 | if (cmd->meta.flags & CMD_WANT_SKB) | |
185 | cmd->meta.source = &cmd->meta; | |
186 | ||
fd4abac5 | 187 | cmd_idx = iwl_enqueue_hcmd(priv, cmd); |
857485c0 TW |
188 | if (cmd_idx < 0) { |
189 | ret = cmd_idx; | |
190 | IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n", | |
191 | get_cmd_string(cmd->id), ret); | |
192 | goto out; | |
193 | } | |
194 | ||
195 | ret = wait_event_interruptible_timeout(priv->wait_command_queue, | |
196 | !test_bit(STATUS_HCMD_ACTIVE, &priv->status), | |
197 | HOST_COMPLETE_TIMEOUT); | |
198 | if (!ret) { | |
199 | if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) { | |
200 | IWL_ERROR("Error sending %s: time out after %dms.\n", | |
201 | get_cmd_string(cmd->id), | |
202 | jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); | |
203 | ||
204 | clear_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
205 | ret = -ETIMEDOUT; | |
206 | goto cancel; | |
207 | } | |
208 | } | |
209 | ||
210 | if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { | |
211 | IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n", | |
212 | get_cmd_string(cmd->id)); | |
213 | ret = -ECANCELED; | |
214 | goto fail; | |
215 | } | |
216 | if (test_bit(STATUS_FW_ERROR, &priv->status)) { | |
217 | IWL_DEBUG_INFO("Command %s failed: FW Error\n", | |
218 | get_cmd_string(cmd->id)); | |
219 | ret = -EIO; | |
220 | goto fail; | |
221 | } | |
222 | if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) { | |
223 | IWL_ERROR("Error: Response NULL in '%s'\n", | |
224 | get_cmd_string(cmd->id)); | |
225 | ret = -EIO; | |
226 | goto out; | |
227 | } | |
228 | ||
229 | ret = 0; | |
230 | goto out; | |
231 | ||
232 | cancel: | |
233 | if (cmd->meta.flags & CMD_WANT_SKB) { | |
234 | struct iwl_cmd *qcmd; | |
235 | ||
236 | /* Cancel the CMD_WANT_SKB flag for the cmd in the | |
237 | * TX cmd queue. Otherwise in case the cmd comes | |
238 | * in later, it will possibly set an invalid | |
239 | * address (cmd->meta.source). */ | |
da99c4b6 | 240 | qcmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx]; |
857485c0 TW |
241 | qcmd->meta.flags &= ~CMD_WANT_SKB; |
242 | } | |
243 | fail: | |
244 | if (cmd->meta.u.skb) { | |
245 | dev_kfree_skb_any(cmd->meta.u.skb); | |
246 | cmd->meta.u.skb = NULL; | |
247 | } | |
248 | out: | |
e5472978 | 249 | clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status); |
857485c0 TW |
250 | return ret; |
251 | } | |
252 | EXPORT_SYMBOL(iwl_send_cmd_sync); | |
253 | ||
254 | int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
255 | { | |
256 | if (cmd->meta.flags & CMD_ASYNC) | |
257 | return iwl_send_cmd_async(priv, cmd); | |
258 | ||
259 | return iwl_send_cmd_sync(priv, cmd); | |
260 | } | |
261 | EXPORT_SYMBOL(iwl_send_cmd); | |
262 | ||
263 | int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data) | |
264 | { | |
265 | struct iwl_host_cmd cmd = { | |
266 | .id = id, | |
267 | .len = len, | |
268 | .data = data, | |
269 | }; | |
270 | ||
271 | return iwl_send_cmd_sync(priv, &cmd); | |
272 | } | |
273 | EXPORT_SYMBOL(iwl_send_cmd_pdu); | |
274 | ||
275 | int iwl_send_cmd_pdu_async(struct iwl_priv *priv, | |
276 | u8 id, u16 len, const void *data, | |
277 | int (*callback)(struct iwl_priv *priv, | |
278 | struct iwl_cmd *cmd, | |
279 | struct sk_buff *skb)) | |
280 | { | |
281 | struct iwl_host_cmd cmd = { | |
282 | .id = id, | |
283 | .len = len, | |
284 | .data = data, | |
285 | }; | |
286 | ||
287 | cmd.meta.flags |= CMD_ASYNC; | |
288 | cmd.meta.u.callback = callback; | |
289 | ||
290 | return iwl_send_cmd_async(priv, &cmd); | |
291 | } | |
292 | EXPORT_SYMBOL(iwl_send_cmd_pdu_async); |