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1 | /* |
2 | * Intel Wireless Multicomm 3200 WiFi driver | |
3 | * | |
4 | * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com> | |
5 | * Samuel Ortiz <samuel.ortiz@intel.com> | |
6 | * Zhu Yi <yi.zhu@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
20 | * 02110-1301, USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/wireless.h> | |
27 | #include <linux/ieee80211.h> | |
28 | #include <net/cfg80211.h> | |
29 | ||
30 | #include "iwm.h" | |
31 | #include "commands.h" | |
32 | #include "cfg80211.h" | |
33 | #include "debug.h" | |
34 | ||
35 | #define RATETAB_ENT(_rate, _rateid, _flags) \ | |
36 | { \ | |
37 | .bitrate = (_rate), \ | |
38 | .hw_value = (_rateid), \ | |
39 | .flags = (_flags), \ | |
40 | } | |
41 | ||
42 | #define CHAN2G(_channel, _freq, _flags) { \ | |
43 | .band = IEEE80211_BAND_2GHZ, \ | |
44 | .center_freq = (_freq), \ | |
45 | .hw_value = (_channel), \ | |
46 | .flags = (_flags), \ | |
47 | .max_antenna_gain = 0, \ | |
48 | .max_power = 30, \ | |
49 | } | |
50 | ||
51 | #define CHAN5G(_channel, _flags) { \ | |
52 | .band = IEEE80211_BAND_5GHZ, \ | |
53 | .center_freq = 5000 + (5 * (_channel)), \ | |
54 | .hw_value = (_channel), \ | |
55 | .flags = (_flags), \ | |
56 | .max_antenna_gain = 0, \ | |
57 | .max_power = 30, \ | |
58 | } | |
59 | ||
60 | static struct ieee80211_rate iwm_rates[] = { | |
61 | RATETAB_ENT(10, 0x1, 0), | |
62 | RATETAB_ENT(20, 0x2, 0), | |
63 | RATETAB_ENT(55, 0x4, 0), | |
64 | RATETAB_ENT(110, 0x8, 0), | |
65 | RATETAB_ENT(60, 0x10, 0), | |
66 | RATETAB_ENT(90, 0x20, 0), | |
67 | RATETAB_ENT(120, 0x40, 0), | |
68 | RATETAB_ENT(180, 0x80, 0), | |
69 | RATETAB_ENT(240, 0x100, 0), | |
70 | RATETAB_ENT(360, 0x200, 0), | |
71 | RATETAB_ENT(480, 0x400, 0), | |
72 | RATETAB_ENT(540, 0x800, 0), | |
73 | }; | |
74 | ||
75 | #define iwm_a_rates (iwm_rates + 4) | |
76 | #define iwm_a_rates_size 8 | |
77 | #define iwm_g_rates (iwm_rates + 0) | |
78 | #define iwm_g_rates_size 12 | |
79 | ||
80 | static struct ieee80211_channel iwm_2ghz_channels[] = { | |
81 | CHAN2G(1, 2412, 0), | |
82 | CHAN2G(2, 2417, 0), | |
83 | CHAN2G(3, 2422, 0), | |
84 | CHAN2G(4, 2427, 0), | |
85 | CHAN2G(5, 2432, 0), | |
86 | CHAN2G(6, 2437, 0), | |
87 | CHAN2G(7, 2442, 0), | |
88 | CHAN2G(8, 2447, 0), | |
89 | CHAN2G(9, 2452, 0), | |
90 | CHAN2G(10, 2457, 0), | |
91 | CHAN2G(11, 2462, 0), | |
92 | CHAN2G(12, 2467, 0), | |
93 | CHAN2G(13, 2472, 0), | |
94 | CHAN2G(14, 2484, 0), | |
95 | }; | |
96 | ||
97 | static struct ieee80211_channel iwm_5ghz_a_channels[] = { | |
98 | CHAN5G(34, 0), CHAN5G(36, 0), | |
99 | CHAN5G(38, 0), CHAN5G(40, 0), | |
100 | CHAN5G(42, 0), CHAN5G(44, 0), | |
101 | CHAN5G(46, 0), CHAN5G(48, 0), | |
102 | CHAN5G(52, 0), CHAN5G(56, 0), | |
103 | CHAN5G(60, 0), CHAN5G(64, 0), | |
104 | CHAN5G(100, 0), CHAN5G(104, 0), | |
105 | CHAN5G(108, 0), CHAN5G(112, 0), | |
106 | CHAN5G(116, 0), CHAN5G(120, 0), | |
107 | CHAN5G(124, 0), CHAN5G(128, 0), | |
108 | CHAN5G(132, 0), CHAN5G(136, 0), | |
109 | CHAN5G(140, 0), CHAN5G(149, 0), | |
110 | CHAN5G(153, 0), CHAN5G(157, 0), | |
111 | CHAN5G(161, 0), CHAN5G(165, 0), | |
112 | CHAN5G(184, 0), CHAN5G(188, 0), | |
113 | CHAN5G(192, 0), CHAN5G(196, 0), | |
114 | CHAN5G(200, 0), CHAN5G(204, 0), | |
115 | CHAN5G(208, 0), CHAN5G(212, 0), | |
116 | CHAN5G(216, 0), | |
117 | }; | |
118 | ||
119 | static struct ieee80211_supported_band iwm_band_2ghz = { | |
120 | .channels = iwm_2ghz_channels, | |
121 | .n_channels = ARRAY_SIZE(iwm_2ghz_channels), | |
122 | .bitrates = iwm_g_rates, | |
123 | .n_bitrates = iwm_g_rates_size, | |
124 | }; | |
125 | ||
126 | static struct ieee80211_supported_band iwm_band_5ghz = { | |
127 | .channels = iwm_5ghz_a_channels, | |
128 | .n_channels = ARRAY_SIZE(iwm_5ghz_a_channels), | |
129 | .bitrates = iwm_a_rates, | |
130 | .n_bitrates = iwm_a_rates_size, | |
131 | }; | |
132 | ||
133 | int iwm_cfg80211_inform_bss(struct iwm_priv *iwm) | |
134 | { | |
135 | struct wiphy *wiphy = iwm_to_wiphy(iwm); | |
136 | struct iwm_bss_info *bss, *next; | |
137 | struct iwm_umac_notif_bss_info *umac_bss; | |
138 | struct ieee80211_mgmt *mgmt; | |
139 | struct ieee80211_channel *channel; | |
140 | struct ieee80211_supported_band *band; | |
141 | s32 signal; | |
142 | int freq; | |
143 | ||
144 | list_for_each_entry_safe(bss, next, &iwm->bss_list, node) { | |
145 | umac_bss = bss->bss; | |
146 | mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf); | |
147 | ||
148 | if (umac_bss->band == UMAC_BAND_2GHZ) | |
149 | band = wiphy->bands[IEEE80211_BAND_2GHZ]; | |
150 | else if (umac_bss->band == UMAC_BAND_5GHZ) | |
151 | band = wiphy->bands[IEEE80211_BAND_5GHZ]; | |
152 | else { | |
153 | IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band); | |
154 | return -EINVAL; | |
155 | } | |
156 | ||
157 | freq = ieee80211_channel_to_frequency(umac_bss->channel); | |
158 | channel = ieee80211_get_channel(wiphy, freq); | |
159 | signal = umac_bss->rssi * 100; | |
160 | ||
161 | if (!cfg80211_inform_bss_frame(wiphy, channel, mgmt, | |
162 | le16_to_cpu(umac_bss->frame_len), | |
163 | signal, GFP_KERNEL)) | |
164 | return -EINVAL; | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static int iwm_cfg80211_change_iface(struct wiphy *wiphy, int ifindex, | |
171 | enum nl80211_iftype type, u32 *flags, | |
172 | struct vif_params *params) | |
173 | { | |
174 | struct net_device *ndev; | |
175 | struct wireless_dev *wdev; | |
176 | struct iwm_priv *iwm; | |
177 | u32 old_mode; | |
178 | ||
179 | /* we're under RTNL */ | |
180 | ndev = __dev_get_by_index(&init_net, ifindex); | |
181 | if (!ndev) | |
182 | return -ENODEV; | |
183 | ||
184 | wdev = ndev->ieee80211_ptr; | |
185 | iwm = ndev_to_iwm(ndev); | |
186 | old_mode = iwm->conf.mode; | |
187 | ||
188 | switch (type) { | |
189 | case NL80211_IFTYPE_STATION: | |
190 | iwm->conf.mode = UMAC_MODE_BSS; | |
191 | break; | |
192 | case NL80211_IFTYPE_ADHOC: | |
193 | iwm->conf.mode = UMAC_MODE_IBSS; | |
194 | break; | |
195 | default: | |
196 | return -EOPNOTSUPP; | |
197 | } | |
198 | ||
199 | wdev->iftype = type; | |
200 | ||
201 | if ((old_mode == iwm->conf.mode) || !iwm->umac_profile) | |
202 | return 0; | |
203 | ||
204 | iwm->umac_profile->mode = cpu_to_le32(iwm->conf.mode); | |
205 | ||
206 | if (iwm->umac_profile_active) { | |
207 | int ret = iwm_invalidate_mlme_profile(iwm); | |
208 | if (ret < 0) | |
209 | IWM_ERR(iwm, "Couldn't invalidate profile\n"); | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int iwm_cfg80211_scan(struct wiphy *wiphy, struct net_device *ndev, | |
216 | struct cfg80211_scan_request *request) | |
217 | { | |
218 | struct iwm_priv *iwm = ndev_to_iwm(ndev); | |
219 | int ret; | |
220 | ||
221 | if (!test_bit(IWM_STATUS_READY, &iwm->status)) { | |
222 | IWM_ERR(iwm, "Scan while device is not ready\n"); | |
223 | return -EIO; | |
224 | } | |
225 | ||
226 | if (test_bit(IWM_STATUS_SCANNING, &iwm->status)) { | |
227 | IWM_ERR(iwm, "Scanning already\n"); | |
228 | return -EAGAIN; | |
229 | } | |
230 | ||
231 | if (test_bit(IWM_STATUS_SCAN_ABORTING, &iwm->status)) { | |
232 | IWM_ERR(iwm, "Scanning being aborted\n"); | |
233 | return -EAGAIN; | |
234 | } | |
235 | ||
236 | set_bit(IWM_STATUS_SCANNING, &iwm->status); | |
237 | ||
238 | ret = iwm_scan_ssids(iwm, request->ssids, request->n_ssids); | |
239 | if (ret) { | |
240 | clear_bit(IWM_STATUS_SCANNING, &iwm->status); | |
241 | return ret; | |
242 | } | |
243 | ||
244 | iwm->scan_request = request; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int iwm_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed) | |
249 | { | |
250 | struct iwm_priv *iwm = wiphy_to_iwm(wiphy); | |
251 | ||
252 | if (changed & WIPHY_PARAM_RTS_THRESHOLD && | |
253 | (iwm->conf.rts_threshold != wiphy->rts_threshold)) { | |
254 | int ret; | |
255 | ||
256 | iwm->conf.rts_threshold = wiphy->rts_threshold; | |
257 | ||
258 | ret = iwm_umac_set_config_fix(iwm, UMAC_PARAM_TBL_CFG_FIX, | |
259 | CFG_RTS_THRESHOLD, | |
260 | iwm->conf.rts_threshold); | |
261 | if (ret < 0) | |
262 | return ret; | |
263 | } | |
264 | ||
265 | if (changed & WIPHY_PARAM_FRAG_THRESHOLD && | |
266 | (iwm->conf.frag_threshold != wiphy->frag_threshold)) { | |
267 | int ret; | |
268 | ||
269 | iwm->conf.frag_threshold = wiphy->frag_threshold; | |
270 | ||
b63b0ea2 | 271 | ret = iwm_umac_set_config_fix(iwm, UMAC_PARAM_TBL_FA_CFG_FIX, |
bb9f8692 ZY |
272 | CFG_FRAG_THRESHOLD, |
273 | iwm->conf.frag_threshold); | |
274 | if (ret < 0) | |
275 | return ret; | |
276 | } | |
277 | ||
278 | return 0; | |
279 | } | |
280 | ||
281 | static int iwm_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *dev, | |
282 | struct cfg80211_ibss_params *params) | |
283 | { | |
284 | struct iwm_priv *iwm = wiphy_to_iwm(wiphy); | |
285 | struct ieee80211_channel *chan = params->channel; | |
286 | struct cfg80211_bss *bss; | |
287 | ||
288 | if (!test_bit(IWM_STATUS_READY, &iwm->status)) | |
289 | return -EIO; | |
290 | ||
291 | /* UMAC doesn't support creating IBSS network with specified bssid. | |
292 | * This should be removed after we have join only mode supported. */ | |
293 | if (params->bssid) | |
294 | return -EOPNOTSUPP; | |
295 | ||
296 | bss = cfg80211_get_ibss(iwm_to_wiphy(iwm), NULL, | |
297 | params->ssid, params->ssid_len); | |
298 | if (!bss) { | |
299 | iwm_scan_one_ssid(iwm, params->ssid, params->ssid_len); | |
300 | schedule_timeout_interruptible(2 * HZ); | |
301 | bss = cfg80211_get_ibss(iwm_to_wiphy(iwm), NULL, | |
302 | params->ssid, params->ssid_len); | |
303 | } | |
304 | /* IBSS join only mode is not supported by UMAC ATM */ | |
305 | if (bss) { | |
306 | cfg80211_put_bss(bss); | |
307 | return -EOPNOTSUPP; | |
308 | } | |
309 | ||
310 | iwm->channel = ieee80211_frequency_to_channel(chan->center_freq); | |
311 | iwm->umac_profile->ibss.band = chan->band; | |
312 | iwm->umac_profile->ibss.channel = iwm->channel; | |
313 | iwm->umac_profile->ssid.ssid_len = params->ssid_len; | |
314 | memcpy(iwm->umac_profile->ssid.ssid, params->ssid, params->ssid_len); | |
315 | ||
316 | if (params->bssid) | |
317 | memcpy(&iwm->umac_profile->bssid[0], params->bssid, ETH_ALEN); | |
318 | ||
319 | return iwm_send_mlme_profile(iwm); | |
320 | } | |
321 | ||
322 | static int iwm_cfg80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev) | |
323 | { | |
324 | struct iwm_priv *iwm = wiphy_to_iwm(wiphy); | |
325 | ||
326 | if (iwm->umac_profile_active) | |
327 | return iwm_invalidate_mlme_profile(iwm); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | static struct cfg80211_ops iwm_cfg80211_ops = { | |
333 | .change_virtual_intf = iwm_cfg80211_change_iface, | |
334 | .scan = iwm_cfg80211_scan, | |
335 | .set_wiphy_params = iwm_cfg80211_set_wiphy_params, | |
336 | .join_ibss = iwm_cfg80211_join_ibss, | |
337 | .leave_ibss = iwm_cfg80211_leave_ibss, | |
338 | }; | |
339 | ||
340 | struct wireless_dev *iwm_wdev_alloc(int sizeof_bus, struct device *dev) | |
341 | { | |
342 | int ret = 0; | |
343 | struct wireless_dev *wdev; | |
344 | ||
345 | /* | |
346 | * We're trying to have the following memory | |
347 | * layout: | |
348 | * | |
349 | * +-------------------------+ | |
350 | * | struct wiphy | | |
351 | * +-------------------------+ | |
352 | * | struct iwm_priv | | |
353 | * +-------------------------+ | |
354 | * | bus private data | | |
355 | * | (e.g. iwm_priv_sdio) | | |
356 | * +-------------------------+ | |
357 | * | |
358 | */ | |
359 | ||
360 | wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL); | |
361 | if (!wdev) { | |
362 | dev_err(dev, "Couldn't allocate wireless device\n"); | |
363 | return ERR_PTR(-ENOMEM); | |
364 | } | |
365 | ||
366 | wdev->wiphy = wiphy_new(&iwm_cfg80211_ops, | |
367 | sizeof(struct iwm_priv) + sizeof_bus); | |
368 | if (!wdev->wiphy) { | |
369 | dev_err(dev, "Couldn't allocate wiphy device\n"); | |
370 | ret = -ENOMEM; | |
371 | goto out_err_new; | |
372 | } | |
373 | ||
374 | set_wiphy_dev(wdev->wiphy, dev); | |
375 | wdev->wiphy->max_scan_ssids = UMAC_WIFI_IF_PROBE_OPTION_MAX; | |
376 | wdev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | | |
377 | BIT(NL80211_IFTYPE_ADHOC); | |
378 | wdev->wiphy->bands[IEEE80211_BAND_2GHZ] = &iwm_band_2ghz; | |
379 | wdev->wiphy->bands[IEEE80211_BAND_5GHZ] = &iwm_band_5ghz; | |
380 | wdev->wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; | |
381 | ||
382 | ret = wiphy_register(wdev->wiphy); | |
383 | if (ret < 0) { | |
384 | dev_err(dev, "Couldn't register wiphy device\n"); | |
385 | goto out_err_register; | |
386 | } | |
387 | ||
388 | return wdev; | |
389 | ||
390 | out_err_register: | |
391 | wiphy_free(wdev->wiphy); | |
392 | ||
393 | out_err_new: | |
394 | kfree(wdev); | |
395 | ||
396 | return ERR_PTR(ret); | |
397 | } | |
398 | ||
399 | void iwm_wdev_free(struct iwm_priv *iwm) | |
400 | { | |
401 | struct wireless_dev *wdev = iwm_to_wdev(iwm); | |
402 | ||
403 | if (!wdev) | |
404 | return; | |
405 | ||
406 | wiphy_unregister(wdev->wiphy); | |
407 | wiphy_free(wdev->wiphy); | |
408 | kfree(wdev); | |
409 | } |