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1/******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 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 * Intel Linux Wireless <ilw@linux.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>
31#include <linux/sched.h>
32#include <net/mac80211.h>
33
34#include "iwl-dev.h"
35#include "iwl-debug.h"
36#include "iwl-eeprom.h"
37#include "iwl-core.h"
38
39
40const char *iwl_legacy_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_WEPKEY);
52 IWL_CMD(REPLY_3945_RX);
53 IWL_CMD(REPLY_TX);
54 IWL_CMD(REPLY_RATE_SCALE);
55 IWL_CMD(REPLY_LEDS_CMD);
56 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
57 IWL_CMD(REPLY_CHANNEL_SWITCH);
58 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
59 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
60 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
61 IWL_CMD(POWER_TABLE_CMD);
62 IWL_CMD(PM_SLEEP_NOTIFICATION);
63 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
64 IWL_CMD(REPLY_SCAN_CMD);
65 IWL_CMD(REPLY_SCAN_ABORT_CMD);
66 IWL_CMD(SCAN_START_NOTIFICATION);
67 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
68 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
69 IWL_CMD(BEACON_NOTIFICATION);
70 IWL_CMD(REPLY_TX_BEACON);
71 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
72 IWL_CMD(REPLY_BT_CONFIG);
73 IWL_CMD(REPLY_STATISTICS_CMD);
74 IWL_CMD(STATISTICS_NOTIFICATION);
75 IWL_CMD(CARD_STATE_NOTIFICATION);
76 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
77 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
78 IWL_CMD(SENSITIVITY_CMD);
79 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
80 IWL_CMD(REPLY_RX_PHY_CMD);
81 IWL_CMD(REPLY_RX_MPDU_CMD);
82 IWL_CMD(REPLY_RX);
83 IWL_CMD(REPLY_COMPRESSED_BA);
84 default:
85 return "UNKNOWN";
86
87 }
88}
89EXPORT_SYMBOL(iwl_legacy_get_cmd_string);
90
91#define HOST_COMPLETE_TIMEOUT (HZ / 2)
92
93static void iwl_legacy_generic_cmd_callback(struct iwl_priv *priv,
94 struct iwl_device_cmd *cmd,
95 struct iwl_rx_packet *pkt)
96{
97 if (pkt->hdr.flags & IWL_CMD_FAILED_MSK) {
98 IWL_ERR(priv, "Bad return from %s (0x%08X)\n",
99 iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
100 return;
101 }
102
103#ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
104 switch (cmd->hdr.cmd) {
105 case REPLY_TX_LINK_QUALITY_CMD:
106 case SENSITIVITY_CMD:
107 IWL_DEBUG_HC_DUMP(priv, "back from %s (0x%08X)\n",
108 iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
109 break;
110 default:
111 IWL_DEBUG_HC(priv, "back from %s (0x%08X)\n",
112 iwl_legacy_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
113 }
114#endif
115}
116
117static int
118iwl_legacy_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
119{
120 int ret;
121
122 BUG_ON(!(cmd->flags & CMD_ASYNC));
123
124 /* An asynchronous command can not expect an SKB to be set. */
125 BUG_ON(cmd->flags & CMD_WANT_SKB);
126
127 /* Assign a generic callback if one is not provided */
128 if (!cmd->callback)
129 cmd->callback = iwl_legacy_generic_cmd_callback;
130
131 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
132 return -EBUSY;
133
134 ret = iwl_legacy_enqueue_hcmd(priv, cmd);
135 if (ret < 0) {
136 IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
137 iwl_legacy_get_cmd_string(cmd->id), ret);
138 return ret;
139 }
140 return 0;
141}
142
143int iwl_legacy_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
144{
145 int cmd_idx;
146 int ret;
147
148 lockdep_assert_held(&priv->mutex);
149
150 BUG_ON(cmd->flags & CMD_ASYNC);
151
152 /* A synchronous command can not have a callback set. */
153 BUG_ON(cmd->callback);
154
155 IWL_DEBUG_INFO(priv, "Attempting to send sync command %s\n",
156 iwl_legacy_get_cmd_string(cmd->id));
157
158 set_bit(STATUS_HCMD_ACTIVE, &priv->status);
159 IWL_DEBUG_INFO(priv, "Setting HCMD_ACTIVE for command %s\n",
160 iwl_legacy_get_cmd_string(cmd->id));
161
162 cmd_idx = iwl_legacy_enqueue_hcmd(priv, cmd);
163 if (cmd_idx < 0) {
164 ret = cmd_idx;
165 IWL_ERR(priv, "Error sending %s: enqueue_hcmd failed: %d\n",
166 iwl_legacy_get_cmd_string(cmd->id), ret);
167 goto out;
168 }
169
170 ret = wait_event_timeout(priv->wait_command_queue,
171 !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
172 HOST_COMPLETE_TIMEOUT);
173 if (!ret) {
174 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
175 IWL_ERR(priv,
176 "Error sending %s: time out after %dms.\n",
177 iwl_legacy_get_cmd_string(cmd->id),
178 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
179
180 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
181 IWL_DEBUG_INFO(priv,
182 "Clearing HCMD_ACTIVE for command %s\n",
183 iwl_legacy_get_cmd_string(cmd->id));
184 ret = -ETIMEDOUT;
185 goto cancel;
186 }
187 }
188
189 if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
190 IWL_ERR(priv, "Command %s aborted: RF KILL Switch\n",
191 iwl_legacy_get_cmd_string(cmd->id));
192 ret = -ECANCELED;
193 goto fail;
194 }
195 if (test_bit(STATUS_FW_ERROR, &priv->status)) {
196 IWL_ERR(priv, "Command %s failed: FW Error\n",
197 iwl_legacy_get_cmd_string(cmd->id));
198 ret = -EIO;
199 goto fail;
200 }
201 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
202 IWL_ERR(priv, "Error: Response NULL in '%s'\n",
203 iwl_legacy_get_cmd_string(cmd->id));
204 ret = -EIO;
205 goto cancel;
206 }
207
208 ret = 0;
209 goto out;
210
211cancel:
212 if (cmd->flags & CMD_WANT_SKB) {
213 /*
214 * Cancel the CMD_WANT_SKB flag for the cmd in the
215 * TX cmd queue. Otherwise in case the cmd comes
216 * in later, it will possibly set an invalid
217 * address (cmd->meta.source).
218 */
219 priv->txq[priv->cmd_queue].meta[cmd_idx].flags &=
220 ~CMD_WANT_SKB;
221 }
222fail:
223 if (cmd->reply_page) {
224 iwl_legacy_free_pages(priv, cmd->reply_page);
225 cmd->reply_page = 0;
226 }
227out:
228 return ret;
229}
230EXPORT_SYMBOL(iwl_legacy_send_cmd_sync);
231
232int iwl_legacy_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
233{
234 if (cmd->flags & CMD_ASYNC)
235 return iwl_legacy_send_cmd_async(priv, cmd);
236
237 return iwl_legacy_send_cmd_sync(priv, cmd);
238}
239EXPORT_SYMBOL(iwl_legacy_send_cmd);
240
241int
242iwl_legacy_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
243{
244 struct iwl_host_cmd cmd = {
245 .id = id,
246 .len = len,
247 .data = data,
248 };
249
250 return iwl_legacy_send_cmd_sync(priv, &cmd);
251}
252EXPORT_SYMBOL(iwl_legacy_send_cmd_pdu);
253
254int iwl_legacy_send_cmd_pdu_async(struct iwl_priv *priv,
255 u8 id, u16 len, const void *data,
256 void (*callback)(struct iwl_priv *priv,
257 struct iwl_device_cmd *cmd,
258 struct iwl_rx_packet *pkt))
259{
260 struct iwl_host_cmd cmd = {
261 .id = id,
262 .len = len,
263 .data = data,
264 };
265
266 cmd.flags |= CMD_ASYNC;
267 cmd.callback = callback;
268
269 return iwl_legacy_send_cmd_async(priv, &cmd);
270}
271EXPORT_SYMBOL(iwl_legacy_send_cmd_pdu_async);