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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: | |
759ef89f | 25 | * Intel Linux Wireless <ilw@linux.intel.com> |
857485c0 TW |
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 | ||
c3056065 | 39 | #define IWL_CMD(x) case x: return #x |
857485c0 TW |
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); |
d732129b | 54 | IWL_CMD(REPLY_3945_RX); |
857485c0 TW |
55 | IWL_CMD(REPLY_TX); |
56 | IWL_CMD(REPLY_RATE_SCALE); | |
57 | IWL_CMD(REPLY_LEDS_CMD); | |
58 | IWL_CMD(REPLY_TX_LINK_QUALITY_CMD); | |
7c616cba | 59 | IWL_CMD(COEX_PRIORITY_TABLE_CMD); |
857485c0 TW |
60 | IWL_CMD(RADAR_NOTIFICATION); |
61 | IWL_CMD(REPLY_QUIET_CMD); | |
62 | IWL_CMD(REPLY_CHANNEL_SWITCH); | |
63 | IWL_CMD(CHANNEL_SWITCH_NOTIFICATION); | |
64 | IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD); | |
65 | IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION); | |
66 | IWL_CMD(POWER_TABLE_CMD); | |
67 | IWL_CMD(PM_SLEEP_NOTIFICATION); | |
68 | IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC); | |
69 | IWL_CMD(REPLY_SCAN_CMD); | |
70 | IWL_CMD(REPLY_SCAN_ABORT_CMD); | |
71 | IWL_CMD(SCAN_START_NOTIFICATION); | |
72 | IWL_CMD(SCAN_RESULTS_NOTIFICATION); | |
73 | IWL_CMD(SCAN_COMPLETE_NOTIFICATION); | |
74 | IWL_CMD(BEACON_NOTIFICATION); | |
75 | IWL_CMD(REPLY_TX_BEACON); | |
76 | IWL_CMD(WHO_IS_AWAKE_NOTIFICATION); | |
77 | IWL_CMD(QUIET_NOTIFICATION); | |
78 | IWL_CMD(REPLY_TX_PWR_TABLE_CMD); | |
79 | IWL_CMD(MEASURE_ABORT_NOTIFICATION); | |
80 | IWL_CMD(REPLY_BT_CONFIG); | |
81 | IWL_CMD(REPLY_STATISTICS_CMD); | |
82 | IWL_CMD(STATISTICS_NOTIFICATION); | |
83 | IWL_CMD(REPLY_CARD_STATE_CMD); | |
84 | IWL_CMD(CARD_STATE_NOTIFICATION); | |
85 | IWL_CMD(MISSED_BEACONS_NOTIFICATION); | |
86 | IWL_CMD(REPLY_CT_KILL_CONFIG_CMD); | |
87 | IWL_CMD(SENSITIVITY_CMD); | |
88 | IWL_CMD(REPLY_PHY_CALIBRATION_CMD); | |
89 | IWL_CMD(REPLY_RX_PHY_CMD); | |
90 | IWL_CMD(REPLY_RX_MPDU_CMD); | |
91 | IWL_CMD(REPLY_RX); | |
92 | IWL_CMD(REPLY_COMPRESSED_BA); | |
7c616cba TW |
93 | IWL_CMD(CALIBRATION_CFG_CMD); |
94 | IWL_CMD(CALIBRATION_RES_NOTIFICATION); | |
95 | IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION); | |
ebbbdc3f | 96 | IWL_CMD(REPLY_TX_POWER_DBM_CMD); |
857485c0 TW |
97 | default: |
98 | return "UNKNOWN"; | |
99 | ||
100 | } | |
101 | } | |
102 | EXPORT_SYMBOL(get_cmd_string); | |
103 | ||
104 | #define HOST_COMPLETE_TIMEOUT (HZ / 2) | |
105 | ||
0472f887 EG |
106 | static int iwl_generic_cmd_callback(struct iwl_priv *priv, |
107 | struct iwl_cmd *cmd, struct sk_buff *skb) | |
108 | { | |
db11d634 | 109 | struct iwl_rx_packet *pkt = NULL; |
0472f887 EG |
110 | |
111 | if (!skb) { | |
15b1687c | 112 | IWL_ERR(priv, "Error: Response NULL in %s.\n", |
0472f887 EG |
113 | get_cmd_string(cmd->hdr.cmd)); |
114 | return 1; | |
115 | } | |
116 | ||
db11d634 | 117 | pkt = (struct iwl_rx_packet *)skb->data; |
0472f887 | 118 | if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) { |
15b1687c | 119 | IWL_ERR(priv, "Bad return from %s (0x%08X)\n", |
0472f887 EG |
120 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
121 | return 1; | |
122 | } | |
123 | ||
ded2ae7c EK |
124 | #ifdef CONFIG_IWLWIFI_DEBUG |
125 | switch (cmd->hdr.cmd) { | |
126 | case REPLY_TX_LINK_QUALITY_CMD: | |
127 | case SENSITIVITY_CMD: | |
128 | IWL_DEBUG_HC_DUMP("back from %s (0x%08X)\n", | |
129 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); | |
130 | break; | |
131 | default: | |
132 | IWL_DEBUG_HC("back from %s (0x%08X)\n", | |
133 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); | |
134 | } | |
135 | #endif | |
0472f887 EG |
136 | |
137 | /* Let iwl_tx_complete free the response skb */ | |
138 | return 1; | |
139 | } | |
140 | ||
857485c0 TW |
141 | static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd) |
142 | { | |
143 | int ret; | |
144 | ||
145 | BUG_ON(!(cmd->meta.flags & CMD_ASYNC)); | |
146 | ||
147 | /* An asynchronous command can not expect an SKB to be set. */ | |
148 | BUG_ON(cmd->meta.flags & CMD_WANT_SKB); | |
149 | ||
0472f887 EG |
150 | /* Assign a generic callback if one is not provided */ |
151 | if (!cmd->meta.u.callback) | |
152 | cmd->meta.u.callback = iwl_generic_cmd_callback; | |
857485c0 TW |
153 | |
154 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
155 | return -EBUSY; | |
156 | ||
fd4abac5 | 157 | ret = iwl_enqueue_hcmd(priv, cmd); |
857485c0 | 158 | if (ret < 0) { |
15b1687c | 159 | IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n", |
857485c0 TW |
160 | get_cmd_string(cmd->id), ret); |
161 | return ret; | |
162 | } | |
163 | return 0; | |
164 | } | |
165 | ||
166 | int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
167 | { | |
168 | int cmd_idx; | |
169 | int ret; | |
857485c0 TW |
170 | |
171 | BUG_ON(cmd->meta.flags & CMD_ASYNC); | |
172 | ||
173 | /* A synchronous command can not have a callback set. */ | |
174 | BUG_ON(cmd->meta.u.callback != NULL); | |
175 | ||
e5472978 | 176 | if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) { |
15b1687c WT |
177 | IWL_ERR(priv, |
178 | "Error sending %s: Already sending a host command\n", | |
179 | get_cmd_string(cmd->id)); | |
e5472978 TW |
180 | ret = -EBUSY; |
181 | goto out; | |
857485c0 TW |
182 | } |
183 | ||
184 | set_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
185 | ||
186 | if (cmd->meta.flags & CMD_WANT_SKB) | |
187 | cmd->meta.source = &cmd->meta; | |
188 | ||
fd4abac5 | 189 | cmd_idx = iwl_enqueue_hcmd(priv, cmd); |
857485c0 TW |
190 | if (cmd_idx < 0) { |
191 | ret = cmd_idx; | |
15b1687c | 192 | IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n", |
857485c0 TW |
193 | get_cmd_string(cmd->id), ret); |
194 | goto out; | |
195 | } | |
196 | ||
197 | ret = wait_event_interruptible_timeout(priv->wait_command_queue, | |
198 | !test_bit(STATUS_HCMD_ACTIVE, &priv->status), | |
199 | HOST_COMPLETE_TIMEOUT); | |
200 | if (!ret) { | |
201 | if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) { | |
15b1687c WT |
202 | IWL_ERR(priv, |
203 | "Error sending %s: time out after %dms.\n", | |
204 | get_cmd_string(cmd->id), | |
205 | jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); | |
857485c0 TW |
206 | |
207 | clear_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
208 | ret = -ETIMEDOUT; | |
209 | goto cancel; | |
210 | } | |
211 | } | |
212 | ||
213 | if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { | |
214 | IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n", | |
215 | get_cmd_string(cmd->id)); | |
216 | ret = -ECANCELED; | |
217 | goto fail; | |
218 | } | |
219 | if (test_bit(STATUS_FW_ERROR, &priv->status)) { | |
220 | IWL_DEBUG_INFO("Command %s failed: FW Error\n", | |
221 | get_cmd_string(cmd->id)); | |
222 | ret = -EIO; | |
223 | goto fail; | |
224 | } | |
225 | if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) { | |
15b1687c | 226 | IWL_ERR(priv, "Error: Response NULL in '%s'\n", |
857485c0 TW |
227 | get_cmd_string(cmd->id)); |
228 | ret = -EIO; | |
73e1a65d | 229 | goto cancel; |
857485c0 TW |
230 | } |
231 | ||
232 | ret = 0; | |
233 | goto out; | |
234 | ||
235 | cancel: | |
236 | if (cmd->meta.flags & CMD_WANT_SKB) { | |
237 | struct iwl_cmd *qcmd; | |
238 | ||
239 | /* Cancel the CMD_WANT_SKB flag for the cmd in the | |
240 | * TX cmd queue. Otherwise in case the cmd comes | |
241 | * in later, it will possibly set an invalid | |
242 | * address (cmd->meta.source). */ | |
da99c4b6 | 243 | qcmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx]; |
857485c0 TW |
244 | qcmd->meta.flags &= ~CMD_WANT_SKB; |
245 | } | |
246 | fail: | |
247 | if (cmd->meta.u.skb) { | |
248 | dev_kfree_skb_any(cmd->meta.u.skb); | |
249 | cmd->meta.u.skb = NULL; | |
250 | } | |
251 | out: | |
e5472978 | 252 | clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status); |
857485c0 TW |
253 | return ret; |
254 | } | |
255 | EXPORT_SYMBOL(iwl_send_cmd_sync); | |
256 | ||
257 | int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
258 | { | |
259 | if (cmd->meta.flags & CMD_ASYNC) | |
260 | return iwl_send_cmd_async(priv, cmd); | |
261 | ||
262 | return iwl_send_cmd_sync(priv, cmd); | |
263 | } | |
264 | EXPORT_SYMBOL(iwl_send_cmd); | |
265 | ||
266 | int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data) | |
267 | { | |
268 | struct iwl_host_cmd cmd = { | |
269 | .id = id, | |
270 | .len = len, | |
271 | .data = data, | |
272 | }; | |
273 | ||
274 | return iwl_send_cmd_sync(priv, &cmd); | |
275 | } | |
276 | EXPORT_SYMBOL(iwl_send_cmd_pdu); | |
277 | ||
278 | int iwl_send_cmd_pdu_async(struct iwl_priv *priv, | |
279 | u8 id, u16 len, const void *data, | |
280 | int (*callback)(struct iwl_priv *priv, | |
281 | struct iwl_cmd *cmd, | |
282 | struct sk_buff *skb)) | |
283 | { | |
284 | struct iwl_host_cmd cmd = { | |
285 | .id = id, | |
286 | .len = len, | |
287 | .data = data, | |
288 | }; | |
289 | ||
290 | cmd.meta.flags |= CMD_ASYNC; | |
291 | cmd.meta.u.callback = callback; | |
292 | ||
293 | return iwl_send_cmd_async(priv, &cmd); | |
294 | } | |
295 | EXPORT_SYMBOL(iwl_send_cmd_pdu_async); |