blob: 8c71ad4f88c5f98e027293a1459d5700a388bb17 [file] [log] [blame]
Tomas Winkler857485c2008-03-21 13:53:44 -07001/******************************************************************************
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:
Winkler, Tomas759ef892008-12-09 11:28:58 -080025 * Intel Linux Wireless <ilw@linux.intel.com>
Tomas Winkler857485c2008-03-21 13:53:44 -070026 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29#include <linux/kernel.h>
30#include <linux/module.h>
Tomas Winkler857485c2008-03-21 13:53:44 -070031#include <net/mac80211.h>
32
Tomas Winkler3e0d4cb2008-04-24 11:55:38 -070033#include "iwl-dev.h" /* FIXME: remove */
Tomas Winkler857485c2008-03-21 13:53:44 -070034#include "iwl-debug.h"
35#include "iwl-eeprom.h"
36#include "iwl-core.h"
37
38
Abhijeet Kolekarc3056062008-11-12 13:14:08 -080039#define IWL_CMD(x) case x: return #x
Tomas Winkler857485c2008-03-21 13:53:44 -070040
41const 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);
Emmanuel Grumbach0a0bed12008-04-14 21:16:05 -070053 IWL_CMD(REPLY_WEPKEY);
Samuel Ortizd7321292009-01-08 10:20:00 -080054 IWL_CMD(REPLY_3945_RX);
Tomas Winkler857485c2008-03-21 13:53:44 -070055 IWL_CMD(REPLY_TX);
56 IWL_CMD(REPLY_RATE_SCALE);
57 IWL_CMD(REPLY_LEDS_CMD);
58 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
Tomas Winkler7c616cb2008-05-29 16:35:05 +080059 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
Tomas Winkler857485c2008-03-21 13:53:44 -070060 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);
Tomas Winkler7c616cb2008-05-29 16:35:05 +080093 IWL_CMD(CALIBRATION_CFG_CMD);
94 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
95 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
Emmanuel Grumbachebbbdc32008-06-30 17:23:05 +080096 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
Tomas Winkler857485c2008-03-21 13:53:44 -070097 default:
98 return "UNKNOWN";
99
100 }
101}
102EXPORT_SYMBOL(get_cmd_string);
103
104#define HOST_COMPLETE_TIMEOUT (HZ / 2)
105
Emmanuel Grumbach0472f882008-03-25 16:33:40 -0700106static int iwl_generic_cmd_callback(struct iwl_priv *priv,
107 struct iwl_cmd *cmd, struct sk_buff *skb)
108{
Tomas Winklerdb11d632008-05-05 10:22:33 +0800109 struct iwl_rx_packet *pkt = NULL;
Emmanuel Grumbach0472f882008-03-25 16:33:40 -0700110
111 if (!skb) {
112 IWL_ERROR("Error: Response NULL in %s.\n",
113 get_cmd_string(cmd->hdr.cmd));
114 return 1;
115 }
116
Tomas Winklerdb11d632008-05-05 10:22:33 +0800117 pkt = (struct iwl_rx_packet *)skb->data;
Emmanuel Grumbach0472f882008-03-25 16:33:40 -0700118 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
119 IWL_ERROR("Bad return from %s (0x%08X)\n",
120 get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
121 return 1;
122 }
123
Esti Kummerded2ae72008-08-04 16:00:45 +0800124#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
Emmanuel Grumbach0472f882008-03-25 16:33:40 -0700136
137 /* Let iwl_tx_complete free the response skb */
138 return 1;
139}
140
Tomas Winkler857485c2008-03-21 13:53:44 -0700141static 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
Emmanuel Grumbach0472f882008-03-25 16:33:40 -0700150 /* Assign a generic callback if one is not provided */
151 if (!cmd->meta.u.callback)
152 cmd->meta.u.callback = iwl_generic_cmd_callback;
Tomas Winkler857485c2008-03-21 13:53:44 -0700153
154 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
155 return -EBUSY;
156
Tomas Winklerfd4abac2008-05-15 13:54:07 +0800157 ret = iwl_enqueue_hcmd(priv, cmd);
Tomas Winkler857485c2008-03-21 13:53:44 -0700158 if (ret < 0) {
159 IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
160 get_cmd_string(cmd->id), ret);
161 return ret;
162 }
163 return 0;
164}
165
166int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
167{
168 int cmd_idx;
169 int ret;
Tomas Winkler857485c2008-03-21 13:53:44 -0700170
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
Tomas Winklere5472972008-03-28 16:21:12 -0700176 if (test_and_set_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)) {
Tomas Winkler857485c2008-03-21 13:53:44 -0700177 IWL_ERROR("Error sending %s: Already sending a host command\n",
178 get_cmd_string(cmd->id));
Tomas Winklere5472972008-03-28 16:21:12 -0700179 ret = -EBUSY;
180 goto out;
Tomas Winkler857485c2008-03-21 13:53:44 -0700181 }
182
183 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
184
185 if (cmd->meta.flags & CMD_WANT_SKB)
186 cmd->meta.source = &cmd->meta;
187
Tomas Winklerfd4abac2008-05-15 13:54:07 +0800188 cmd_idx = iwl_enqueue_hcmd(priv, cmd);
Tomas Winkler857485c2008-03-21 13:53:44 -0700189 if (cmd_idx < 0) {
190 ret = cmd_idx;
191 IWL_ERROR("Error sending %s: enqueue_hcmd failed: %d\n",
192 get_cmd_string(cmd->id), ret);
193 goto out;
194 }
195
196 ret = wait_event_interruptible_timeout(priv->wait_command_queue,
197 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
198 HOST_COMPLETE_TIMEOUT);
199 if (!ret) {
200 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
201 IWL_ERROR("Error sending %s: time out after %dms.\n",
202 get_cmd_string(cmd->id),
203 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
204
205 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
206 ret = -ETIMEDOUT;
207 goto cancel;
208 }
209 }
210
211 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
212 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
213 get_cmd_string(cmd->id));
214 ret = -ECANCELED;
215 goto fail;
216 }
217 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
218 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
219 get_cmd_string(cmd->id));
220 ret = -EIO;
221 goto fail;
222 }
223 if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
224 IWL_ERROR("Error: Response NULL in '%s'\n",
225 get_cmd_string(cmd->id));
226 ret = -EIO;
227 goto out;
228 }
229
230 ret = 0;
231 goto out;
232
233cancel:
234 if (cmd->meta.flags & CMD_WANT_SKB) {
235 struct iwl_cmd *qcmd;
236
237 /* Cancel the CMD_WANT_SKB flag for the cmd in the
238 * TX cmd queue. Otherwise in case the cmd comes
239 * in later, it will possibly set an invalid
240 * address (cmd->meta.source). */
Gregory Greenmanda99c4b2008-08-04 16:00:40 +0800241 qcmd = priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
Tomas Winkler857485c2008-03-21 13:53:44 -0700242 qcmd->meta.flags &= ~CMD_WANT_SKB;
243 }
244fail:
245 if (cmd->meta.u.skb) {
246 dev_kfree_skb_any(cmd->meta.u.skb);
247 cmd->meta.u.skb = NULL;
248 }
249out:
Tomas Winklere5472972008-03-28 16:21:12 -0700250 clear_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status);
Tomas Winkler857485c2008-03-21 13:53:44 -0700251 return ret;
252}
253EXPORT_SYMBOL(iwl_send_cmd_sync);
254
255int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
256{
257 if (cmd->meta.flags & CMD_ASYNC)
258 return iwl_send_cmd_async(priv, cmd);
259
260 return iwl_send_cmd_sync(priv, cmd);
261}
262EXPORT_SYMBOL(iwl_send_cmd);
263
264int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
265{
266 struct iwl_host_cmd cmd = {
267 .id = id,
268 .len = len,
269 .data = data,
270 };
271
272 return iwl_send_cmd_sync(priv, &cmd);
273}
274EXPORT_SYMBOL(iwl_send_cmd_pdu);
275
276int iwl_send_cmd_pdu_async(struct iwl_priv *priv,
277 u8 id, u16 len, const void *data,
278 int (*callback)(struct iwl_priv *priv,
279 struct iwl_cmd *cmd,
280 struct sk_buff *skb))
281{
282 struct iwl_host_cmd cmd = {
283 .id = id,
284 .len = len,
285 .data = data,
286 };
287
288 cmd.meta.flags |= CMD_ASYNC;
289 cmd.meta.u.callback = callback;
290
291 return iwl_send_cmd_async(priv, &cmd);
292}
293EXPORT_SYMBOL(iwl_send_cmd_pdu_async);