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857485c0 TW |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
01f8162a | 5 | * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved. |
857485c0 TW |
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> | |
d43c36dc | 31 | #include <linux/sched.h> |
857485c0 TW |
32 | #include <net/mac80211.h> |
33 | ||
3e0d4cb1 | 34 | #include "iwl-dev.h" /* FIXME: remove */ |
857485c0 TW |
35 | #include "iwl-debug.h" |
36 | #include "iwl-eeprom.h" | |
37 | #include "iwl-core.h" | |
38 | ||
39 | ||
857485c0 TW |
40 | const char *get_cmd_string(u8 cmd) |
41 | { | |
42 | switch (cmd) { | |
43 | IWL_CMD(REPLY_ALIVE); | |
44 | IWL_CMD(REPLY_ERROR); | |
45 | IWL_CMD(REPLY_RXON); | |
46 | IWL_CMD(REPLY_RXON_ASSOC); | |
47 | IWL_CMD(REPLY_QOS_PARAM); | |
48 | IWL_CMD(REPLY_RXON_TIMING); | |
49 | IWL_CMD(REPLY_ADD_STA); | |
50 | IWL_CMD(REPLY_REMOVE_STA); | |
51 | IWL_CMD(REPLY_REMOVE_ALL_STA); | |
0a0bed1d | 52 | IWL_CMD(REPLY_WEPKEY); |
d732129b | 53 | IWL_CMD(REPLY_3945_RX); |
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 | ||
5696aea6 JB |
105 | static void iwl_generic_cmd_callback(struct iwl_priv *priv, |
106 | struct iwl_device_cmd *cmd, | |
107 | struct sk_buff *skb) | |
0472f887 | 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 | 113 | get_cmd_string(cmd->hdr.cmd)); |
5696aea6 | 114 | return; |
0472f887 EG |
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 | 120 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
5696aea6 | 121 | return; |
0472f887 EG |
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: | |
e1623446 | 128 | IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n", |
ded2ae7c | 129 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
5696aea6 | 130 | break; |
ded2ae7c | 131 | default: |
e1623446 | 132 | IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n", |
ded2ae7c EK |
133 | get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); |
134 | } | |
135 | #endif | |
0472f887 EG |
136 | } |
137 | ||
857485c0 TW |
138 | static int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd) |
139 | { | |
140 | int ret; | |
141 | ||
c2acea8e | 142 | BUG_ON(!(cmd->flags & CMD_ASYNC)); |
857485c0 TW |
143 | |
144 | /* An asynchronous command can not expect an SKB to be set. */ | |
c2acea8e | 145 | BUG_ON(cmd->flags & CMD_WANT_SKB); |
857485c0 | 146 | |
0472f887 | 147 | /* Assign a generic callback if one is not provided */ |
c2acea8e JB |
148 | if (!cmd->callback) |
149 | cmd->callback = iwl_generic_cmd_callback; | |
857485c0 TW |
150 | |
151 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
152 | return -EBUSY; | |
153 | ||
fd4abac5 | 154 | ret = iwl_enqueue_hcmd(priv, cmd); |
857485c0 | 155 | if (ret < 0) { |
15b1687c | 156 | IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n", |
857485c0 TW |
157 | get_cmd_string(cmd->id), ret); |
158 | return ret; | |
159 | } | |
160 | return 0; | |
161 | } | |
162 | ||
163 | int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
164 | { | |
165 | int cmd_idx; | |
166 | int ret; | |
857485c0 | 167 | |
c2acea8e | 168 | BUG_ON(cmd->flags & CMD_ASYNC); |
857485c0 TW |
169 | |
170 | /* A synchronous command can not have a callback set. */ | |
c2acea8e | 171 | BUG_ON(cmd->callback); |
857485c0 | 172 | |
e5472978 | 173 | if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) { |
15b1687c WT |
174 | IWL_ERR(priv, |
175 | "Error sending %s: Already sending a host command\n", | |
176 | get_cmd_string(cmd->id)); | |
e5472978 TW |
177 | ret = -EBUSY; |
178 | goto out; | |
857485c0 TW |
179 | } |
180 | ||
181 | set_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
182 | ||
fd4abac5 | 183 | cmd_idx = iwl_enqueue_hcmd(priv, cmd); |
857485c0 TW |
184 | if (cmd_idx < 0) { |
185 | ret = cmd_idx; | |
15b1687c | 186 | IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n", |
857485c0 TW |
187 | get_cmd_string(cmd->id), ret); |
188 | goto out; | |
189 | } | |
190 | ||
191 | ret = wait_event_interruptible_timeout(priv->wait_command_queue, | |
192 | !test_bit(STATUS_HCMD_ACTIVE, &priv->status), | |
193 | HOST_COMPLETE_TIMEOUT); | |
194 | if (!ret) { | |
195 | if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) { | |
15b1687c WT |
196 | IWL_ERR(priv, |
197 | "Error sending %s: time out after %dms.\n", | |
198 | get_cmd_string(cmd->id), | |
199 | jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); | |
857485c0 TW |
200 | |
201 | clear_bit(STATUS_HCMD_ACTIVE, &priv->status); | |
202 | ret = -ETIMEDOUT; | |
203 | goto cancel; | |
204 | } | |
205 | } | |
206 | ||
207 | if (test_bit(STATUS_RF_KILL_HW, &priv->status)) { | |
e1623446 | 208 | IWL_DEBUG_INFO(priv, "Command %s aborted: RF KILL Switch\n", |
857485c0 TW |
209 | get_cmd_string(cmd->id)); |
210 | ret = -ECANCELED; | |
211 | goto fail; | |
212 | } | |
213 | if (test_bit(STATUS_FW_ERROR, &priv->status)) { | |
e1623446 | 214 | IWL_DEBUG_INFO(priv, "Command %s failed: FW Error\n", |
857485c0 TW |
215 | get_cmd_string(cmd->id)); |
216 | ret = -EIO; | |
217 | goto fail; | |
218 | } | |
c2acea8e | 219 | if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_skb) { |
15b1687c | 220 | IWL_ERR(priv, "Error: Response NULL in '%s'\n", |
857485c0 TW |
221 | get_cmd_string(cmd->id)); |
222 | ret = -EIO; | |
73e1a65d | 223 | goto cancel; |
857485c0 TW |
224 | } |
225 | ||
226 | ret = 0; | |
227 | goto out; | |
228 | ||
229 | cancel: | |
c2acea8e JB |
230 | if (cmd->flags & CMD_WANT_SKB) { |
231 | /* | |
232 | * Cancel the CMD_WANT_SKB flag for the cmd in the | |
857485c0 TW |
233 | * TX cmd queue. Otherwise in case the cmd comes |
234 | * in later, it will possibly set an invalid | |
c2acea8e JB |
235 | * address (cmd->meta.source). |
236 | */ | |
237 | priv->txq[IWL_CMD_QUEUE_NUM].meta[cmd_idx].flags &= | |
238 | ~CMD_WANT_SKB; | |
857485c0 TW |
239 | } |
240 | fail: | |
c2acea8e JB |
241 | if (cmd->reply_skb) { |
242 | dev_kfree_skb_any(cmd->reply_skb); | |
243 | cmd->reply_skb = NULL; | |
857485c0 TW |
244 | } |
245 | out: | |
e5472978 | 246 | clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status); |
857485c0 TW |
247 | return ret; |
248 | } | |
249 | EXPORT_SYMBOL(iwl_send_cmd_sync); | |
250 | ||
251 | int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd) | |
252 | { | |
c2acea8e | 253 | if (cmd->flags & CMD_ASYNC) |
857485c0 TW |
254 | return iwl_send_cmd_async(priv, cmd); |
255 | ||
256 | return iwl_send_cmd_sync(priv, cmd); | |
257 | } | |
258 | EXPORT_SYMBOL(iwl_send_cmd); | |
259 | ||
260 | int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data) | |
261 | { | |
262 | struct iwl_host_cmd cmd = { | |
263 | .id = id, | |
264 | .len = len, | |
265 | .data = data, | |
266 | }; | |
267 | ||
268 | return iwl_send_cmd_sync(priv, &cmd); | |
269 | } | |
270 | EXPORT_SYMBOL(iwl_send_cmd_pdu); | |
271 | ||
272 | int iwl_send_cmd_pdu_async(struct iwl_priv *priv, | |
273 | u8 id, u16 len, const void *data, | |
5696aea6 JB |
274 | void (*callback)(struct iwl_priv *priv, |
275 | struct iwl_device_cmd *cmd, | |
276 | struct sk_buff *skb)) | |
857485c0 TW |
277 | { |
278 | struct iwl_host_cmd cmd = { | |
279 | .id = id, | |
280 | .len = len, | |
281 | .data = data, | |
282 | }; | |
283 | ||
c2acea8e JB |
284 | cmd.flags |= CMD_ASYNC; |
285 | cmd.callback = callback; | |
857485c0 TW |
286 | |
287 | return iwl_send_cmd_async(priv, &cmd); | |
288 | } | |
289 | EXPORT_SYMBOL(iwl_send_cmd_pdu_async); |